A label printer with a sticker positioning and unlocking function

Abstract

The present invention discloses a label printer with a sticker positioning and unlocking function, which includes a machine body, a label cassette for being built in the machine body, and a machine rear cover installed on the machine body; the label cassette uses a paper pressing spring arm that can rotate around the center to position the sticker. When the label cassette is built in the machine body and the machine rear cover is installed on the machine body, a rubber roller in the machine body presses the sticker against the print head in the machine body, and the positioning function of the paper pressing spring arm is triggered and unlocked simultaneously or subsequently. For the label printer of the present invention, through the action of the paper pressing spring arm, the label cassette can both position the sticker and has the characteristic of being unlocked. Correspondingly, a positioning and unlocking mechanism is provided on the printer, which positions the sticker against the print head in the machine body through the rubber roller respectively, and then unlocks the label cassette either subsequently or simultaneously, achieving effective positioning and unlocking of the sticker, and reducing the printing power, being suitable for popularization and application.

Description

Technical Field

[0001] The present invention relates to the field of label printers, and particularly to a label printer with a sticker positioning and unlocking function. Background Art

[0002] For the label cassette used in label printers, there is an anti-retraction structure in the industry to restrict the free state of the sticker paper roll, but it cannot prevent the sticker from being pulled outwards, and the structure is relatively complex. Moreover, during printing, due to the non-release and unlocking of the anti-retraction binding force, the power required for printing is relatively large.

[0003] Thus, it can be seen that the existing label cassettes with sticker positioning functions and their corresponding label printers obviously still have inconveniences and defects in terms of structure, method, and use, and thus urgently need to be further improved. How to create a label printer that can effectively position and unlock the sticker and reduce the printing power has become an extremely urgent improvement goal in the current industry. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a label printer with a sticker positioning and unlocking function, which can effectively position and unlock the sticker and reduce the printing power.

[0005] To solve the above technical problem, the present invention adopts the following technical solution:

[0006] A label printer with a sticker positioning and unlocking function includes a machine body, a label cassette built in the machine body, and a machine rear cover installed on the machine body; the label cassette uses a paper pressing spring arm that can rotate around the center to position the sticker. When the label cassette is built in the machine body and the machine rear cover is installed on the machine body, a rubber roller in the machine body presses the sticker against a print head in the machine body, and the positioning function of the paper pressing spring arm is triggered to be unlocked simultaneously or subsequently.

[0007] As a further improvement of the present invention, the label cassette includes a housing for placing a sticker roll. A sticker passage is provided near one side inside the housing, and the paper pressing spring arm is installed at the housing outside the sticker passage. The paper pressing spring arm includes a paper pressing arm and a driving spring arm, and the paper pressing arm and the driving spring arm are connected so that the paper pressing spring arm can rotate around the connection center of the two. The paper pressing spring arm is rotatably connected to the housing through the connection center. At the housing outside the sticker passage, at a position corresponding to the end of the driving spring arm, a positioning portion for the end of the driving spring arm is provided. At the housing inside the sticker passage, at a position corresponding to the end of the paper pressing arm, a rib or a vertical wall is provided. When the driving spring arm is installed at the positioning portion for the end of the driving spring arm, under the action of the driving spring arm, the end of the paper pressing arm can press the sticker tightly against the rib or the vertical wall. When the driving spring arm is subjected to a pressure towards the inside of the housing, the paper pressing arm can rotate around the connection center under the drive of the driving spring arm, so that the end of the paper pressing arm is separated from the rib or the vertical wall.

[0008] Further, in the label cassette, the positioning portion for the end of the driving spring arm is a protruding post on the housing, and the driving spring arm is tripped on the protruding post of the housing after being toggled to generate an elastic force. At both upper and lower ends of the connection center of the paper pressing arm and the driving spring arm, protruding positioning posts are provided, and the paper pressing arm and the driving spring arm can rotate with the upper and lower two positioning posts as the centers of circles. The corresponding positions on the housing are provided with positioning holes corresponding to the upper and lower two positioning posts; or a positioning through hole is provided at the connection center of the paper pressing arm and the driving spring arm, and a positioning shaft is provided at the position on the housing corresponding to the positioning through hole. The paper pressing arm and the driving spring arm can rotate with the positioning shaft as the center of the circle.

[0009] Further, in the label cassette, the end of the paper pressing arm and the rib or the vertical wall adopt a concave-convex matching structure; the end of the driving spring arm is in a hook shape, the hook faces towards the inside of the housing, and the hook is tripped on the protruding post of the housing; the paper pressing arm is in a plate-like structure, the end of the plate-like structure is bent towards the inside of the housing, and the bent end is the pressing end; the plate-like structure is an intermediate open plate or a non-open plate.

[0010] Further, the width of the paper pressing arm is smaller than the width of the sticker inside the housing and larger than the width of the driving spring arm.

[0011] Further, the driving spring arm of the paper pressing spring arm is made of a metal spring sheet, the paper pressing arm is made of a plastic material, and the paper pressing spring arm is an integrally formed structure.

[0012] Further, inside the machine body, the rubber roller is installed on a rubber roller bracket, and the rubber roller bracket is movably installed on the side of the machine body; at a position on the side of the machine body corresponding to the paper pressing spring arm of the label box, an unlocking pressure block is movably installed; on the machine body or the machine rear cover, a first trigger and a second trigger are provided; the first trigger is used to trigger the rubber roller bracket to drive the rubber roller to press the sticker inward against the print head; the second trigger is used to trigger the unlocking pressure block to press the elastic end of the paper pressing spring arm inward, thereby driving the other end of the paper pressing spring arm to lift off the sticker.

[0013] Further, the first trigger and the second trigger are located on the machine rear cover. When the machine rear cover is buckled with the machine body, the downward linear motion of the first trigger and the second trigger is converted into the rotation or sliding of the rubber roller bracket and the unlocking pressure block; or, the first trigger and the second trigger are located on the machine body or the machine rear cover, and the first trigger and the second trigger are converted into the rotation or sliding of the rubber roller bracket and the unlocking pressure block through rotation; the first trigger and the second trigger are asynchronous trigger parts or synchronous trigger parts; when triggered asynchronously, the first trigger is the first trigger part and the second trigger is the second trigger part.

[0014] Further, the first trigger and the second trigger are two downward wedge-shaped structures located on the side of the machine rear cover; wherein, the first trigger is a long wedge structure and the second trigger is a short wedge structure; when pressing the machine rear cover downward onto the machine body, the first trigger contacts the rubber roller bracket first, driving the rubber roller to press the sticker against the print head; the second trigger contacts the unlocking pressure block later, triggering the unlocking pressure block to press the elastic end of the paper pressing spring arm inward, thereby driving the other end of the paper pressing spring arm to lift off the sticker.

[0015] Further, the rear end of the rubber roller bracket is installed on the machine body through a vertical rotating shaft, and the rubber roller is arranged inside the front end of the rubber roller bracket; the rear end of the unlocking pressure block is also installed on the vertical rotating shaft; the rubber roller bracket and the unlocking pressure block can rotate around the vertical rotating shaft under the triggering action and can return to the original position when the triggering action is cancelled.

[0016] By adopting the above technical solutions, the present invention has at least the following advantages:

[0017] 1. The label printer of the present invention has a built-in label cassette that uses a paper pressing spring arm that can rotate around the center to position the sticker. When the label cassette is placed inside the machine body and the machine back cover is installed on the machine body, the rubber roller inside the machine body presses the sticker tightly against the print head inside the machine body, and the positioning function of the paper pressing spring arm is triggered and unlocked simultaneously or subsequently. Through the action of the paper pressing spring arm, before printing, the sticker in the label cassette is positioned at an accurate position, which can not only prevent the sticker from retracting, but also prevent the sticker from being pulled outwards. Correspondingly, a positioning unlocking mechanism is provided inside the label printer. After the label cassette is placed in the printer, it drives the rubber roller to press the sticker tightly against the print head inward for positioning through triggering, ensuring that the accurate position of the sticker positioning does not change. On this basis, by unlocking the paper pressing spring arm, the pressing restraint force on the sticker is released, the power required during printing does not increase, and the sticker is pressed by the print head and the rubber roller for printing, ensuring accurate printing position and avoiding unnecessary sticker waste. After printing is completed, when the label cassette consumable is taken out, the sticker positioning function continues to effectively press and restrain the sticker, always ensuring that the sticker is positioned at the accurate position required for printing, improving the sticker utilization rate.

[0018] 2. When in use, due to the elastic action of the driving spring arm, the label cassette can drive the paper pressing arm to rotate around the connection center when it is subjected to pressure towards the inner side of the shell, so that the end of the paper pressing arm releases the pressing restraint force, and it has the characteristic of being unlockable. Therefore, it does not interfere with the normal printing process.

[0019] 3. The label printer of the present invention with a sticker positioning and unlocking function has a simple structure of the positioning unlocking mechanism, is easy to assemble, and is suitable for popularization and application. Brief Description of the Drawings

[0020] The above is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, the following further detailed description of the present invention will be given in conjunction with the drawings and specific embodiments.

[0021] Figure 1 is a schematic diagram of the structure of a label cassette with a sticker positioning function (inside);

[0022] Figure 2 is a schematic diagram of the split structure of a label cassette with a sticker positioning function;

[0023] Figure 3 is a schematic diagram of the structure of the paper pressing spring arm;

[0024] Figure 4 is a schematic diagram of the exploded structure of a label printer with a label cassette installed (partial);

[0025] Figure 5 is a schematic diagram of a partial structure of a label printer containing a machine body and a label cassette;

[0026] Figure 6 is Figure 5 a top - view structural schematic diagram;

[0027] Figure 7 is an exploded structural schematic diagram (overall) of a label printer equipped with a label cassette. Detailed implementation manners

[0028] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0029] The present invention provides a label printer with a sticker positioning and unlocking function. Its main design concept is to first set the built - in label cassette to have the characteristics of positioning and being unlockable at the same time. Correspondingly, a positioning and unlocking mechanism is provided on the printer. The sticker is pressed against the print head in the main body of the printer by a rubber roller for positioning, and then or simultaneously, the label cassette is unlocked.

[0030] Based on the above design concept, the label printer with a sticker positioning and unlocking function of the present invention includes a main body, a label cassette built in the main body, and a machine rear cover installed on the main body. The label cassette uses a paper - pressing elastic arm that can rotate around the center to position the sticker. When the label cassette is built in the main body and the machine rear cover is installed on the main body, the rubber roller in the main body presses the sticker against the print head in the main body, and the positioning function of the paper - pressing elastic arm is triggered to be unlocked simultaneously or subsequently.

[0031] Hereinafter, it will be described in detail with reference to the accompanying drawings.

[0032] As Figure 1-2 shown, it is a label cassette with a sticker positioning function. As an internal consumable of the label printer, the label cassette has a sticker positioning function and the characteristic of being unlockable at the same time. It includes a housing 11, and a sticker roll is placed in the housing 11. In this embodiment, the housing form is a combination of an upper housing and a lower housing. Here, the housing 11 is the lower housing in this embodiment. Of course, this method is for convenient assembly. In fact, it is not limited to the above - mentioned housing form of the combination of the upper and lower housings. Those skilled in the art can select the housing form according to actual needs. A fixed sticker channel is provided near one side in the housing 11. The sticker 13 extends through this sticker channel to the paper outlet of the label cassette. The upper housing 16 and the housing 11 (lower housing) need to protect a certain width of the upper and lower edges of the sticker 13 in the sticker channel to prevent the sticker 13 from slipping out of the sticker channel.

[0033] A paper pressing spring arm 12 is installed at the housing 11 outside the sticker channel; meanwhile, in cooperation with Figure 3 As shown, the paper pressing spring arm 12 includes a paper pressing arm 121 and a driving spring arm 122, and the paper pressing arm 121 and the driving spring arm 122 are connected so that the paper pressing spring arm 12 can rotate around the connection center of the two. The paper pressing spring arm 12 is rotatably connected to the housing through the connection center; at the housing outside the sticker channel, at a position corresponding to the end of the driving spring arm 122, a driving spring arm end positioning portion 15 is provided; at the housing inside the sticker channel, at a position corresponding to the end of the paper pressing arm 121, a rib or a vertical wall 14 is provided; when the label box 1 is in a normal state, the driving spring arm 122 is toggled a certain stroke, generates a certain elastic force and then is caught on the driving spring arm end positioning portion 15. Under the action of the driving spring arm 122, the end of the paper pressing arm 121 can press the sticker 13 tightly against the rib or the vertical wall 14; at this time, due to the action of the pressing binding force, the label box has a two-way function of preventing the sticker from retracting and preventing the sticker from being pulled outwards, ensuring the accurate and stable position of the sticker, avoiding unnecessary sticker waste caused by the sticker being pulled out, and improving the sticker utilization rate. For the above-mentioned label box, when in printing use, since the driving spring arm 122 has a certain elastic force, it can drive the paper pressing arm 121 to rotate around the connection center when being subjected to a pressure towards the inner side of the housing, so that the end of the paper pressing arm 121 is disengaged from the rib or the vertical wall 14, releasing the binding force for pressing the sticker, and has the characteristic of being unlockable. Therefore, it does not prevent the normal printing from proceeding.

[0034] The above-mentioned driving spring arm end positioning portion 15 is preferably a protruding structure on the housing, such as but not limited to a protruding post. The driving spring arm 122 is toggled outwards a certain stroke, generates a certain elastic force and then is caught on the protruding post of the housing (it should be noted here that Figure 1 , 2 the driving spring arms 122 in are in an uncaught state). By this way, it can be ensured that the end of the paper pressing arm 121 can generate sufficient pressing binding force.

[0035] The paper pressing spring arm 12 is rotatably connected to the housing through the connection center, preferably but not limited to the following two methods. One method is as shown in Figure 1-3As shown in the figure, protruding positioning posts 123 are provided at both the upper and lower ends of the connection center of the paper pressing arm 121 and the driving spring arm 122. The paper pressing arm 121 and the driving spring arm 122 can rotate around the upper and lower two positioning posts 123 as the center of the circle. Corresponding positioning holes are provided at the corresponding positions of the housing. When the housing adopts the method of upper and lower housing cooperation, corresponding positioning round holes are provided at the corresponding positions of the upper and lower housings. As an alternative, in the second method, a positioning through hole is provided at the connection center of the paper pressing arm 121 and the driving spring arm 122, and a positioning shaft is provided at the position of the housing corresponding to the positioning through hole; the paper pressing arm 121 and the driving spring arm 122 can rotate around the positioning shaft as the center of the circle. Through the above structure, the paper pressing spring arm 12 can rotate around the connection center. The above paper pressing spring arm 12 is buckled between the upper housing 16 and the lower housing, and an opening is provided at the housing corresponding to the middle section of the driving spring arm 122 of the paper pressing spring arm 12 and the paper pressing arm 121. Through the above opening, it is convenient for the outside to apply pressure to the driving spring arm towards the inside of the housing, thereby driving the rotation of the paper pressing arm 121.

[0036] The end of the paper pressing arm 121 and the vertical rib or vertical wall 14 adopt a concave-convex matching structure. For example, the end of the paper pressing arm 121 adopts a groove structure (as Figure 3 shown), and the vertical rib or vertical wall 14 adopts a convex structure matching the groove structure; or, the end of the paper pressing arm 121 adopts a convex structure, and the vertical rib or vertical wall 14 adopts a groove structure matching the convex structure. The groove and the convex cooperate with each other to press the sticker more reliably and stably, so as to realize the accurate and stable positioning of the sticker position.

[0037] Cooperate Figure 3 As shown in the figure, the end of the driving spring arm 122 is in a hook shape, the hook faces the inside of the housing, and the hook catches on the protruding column of the housing. When the driving spring arm 122 is subjected to an inward pressure, relative movement can occur between the end and the protruding column, causing the middle section of the driving spring arm 122 to bend slightly towards the inside of the housing, and further driving the end of the paper pressing arm 121 to disengage from the vertical rib or vertical wall 14.

[0038] Cooperate Figure 3 As shown in the figure, the paper pressing arm 121 is preferably but not limited to a plate-like structure. The end of the plate-like structure bends towards the inside of the housing, and the bent end is the pressing end. The above-mentioned concave-convex structure is arranged at the pressing end; the above-mentioned plate-like structure can be a middle-opening plate or a non-opening plate.

[0039] The width of the paper pressing arm 121 is smaller than the width of the sticker 13 inside the housing and larger than the width of the driving spring arm 122, so that the paper pressing arm 121 can perform effective pressing restraint.

[0040] In the above embodiments, the driving spring arm 122 of the paper pressing spring arm 12 is preferably made of a metal spring piece, which can generate a certain elastic deformation under the action of an external force, while the paper pressing arm 121 is preferably made of a plastic material, and the paper pressing spring arm 12 is preferably but not limited to an integrally formed structure.

[0041] Such as Figures 4-7 , a label printer with the above label cassette built-in is provided. The label printer is used in conjunction with the built-in label cassette, mainly for unlocking the sticker positioning function of the above label cassette, and can ensure that the label printer has an effective sticker positioning function and does not affect the printing process, avoiding excessive power consumption of the printer.

[0042] The label printer includes a machine body 2, a label cassette 1 for being built into the machine body, and a machine rear cover 3 installed on the machine body 2; a print head 21 is provided at the machine body 2 inside the sticker channel of the label cassette 1; at a position corresponding to the print head on the side of the machine body 2, a rubber roller bracket 23 with a rubber roller 22 is movably installed; at a position corresponding to the driving spring arm 122 of the label cassette 1 on the side of the machine body 2, an unlocking block 24 is movably installed. The function of the rubber roller bracket 23 is to drive the rubber roller 22 to press the sticker 13 inwardly against the print head 21, so that it can effectively position the sticker 13. The function of the unlocking block 24 is to press the driving spring arm 122 inwardly, thereby driving the end of the paper pressing arm 121 to lift off the sticker 13 to achieve unlocking, without affecting the printing process and without consuming additional power.

[0043] When the above label cassette 1 is placed into the machine body 2, at this time, the rubber roller bracket 23 and the unlocking block 24 do not act, and the sticker positioning function is still effective. In order to achieve unlocking, the above rubber roller bracket 23 and unlocking block 24 are both equipped with corresponding trigger parts, which can be triggered by the trigger parts. In this embodiment, a first trigger part 31 and a second trigger part 32 are provided on the machine rear cover 3 that is fastened to the machine body 2, and both are wedge-shaped structures located on the side of the machine rear cover 3 and facing downward; for example, preferably, the first trigger part 31 is a long wedge structure and the second trigger part 32 is a short wedge structure; two sockets 25, 26 are opened at the top of the side of the machine body 2; when the machine rear cover 3 is pressed downward onto the machine body 2, the first trigger part 31 first inserts into the socket 25 from the outside and contacts the rubber roller bracket 23, driving the rubber roller 22 to press the sticker 13 tightly against the print head 21; the second trigger part 32 then inserts into the socket 26, and continues to press the machine rear cover 3 for a certain stroke, and the second trigger part 32 contacts the unlocking block 24, triggering the unlocking block 24 to press the driving spring arm 122 inwardly. After the driving spring arm 122 is stressed, the paper pressing spring arm 12 itself rotates, driving the end of the paper pressing arm 121 to lift off the sticker 13, thereby achieving the unlocking of the sticker positioning function.

[0044] In this embodiment, as a preferred solution, the rear end of the rubber roller bracket 23 is installed on the machine body 2 through a vertical rotating shaft 27, and the rubber roller 22 is arranged inside the front end of the rubber roller bracket 23; the rear end of the unlocking block 24 is also installed on the vertical rotating shaft 27; the rubber roller bracket 23 and the unlocking block 24 can rotate around the vertical rotating shaft 27 under the triggering action and can return to their original positions when the triggering action is cancelled.

[0045] As can be seen from the above embodiment, it is preferred that the first trigger 31 and the second trigger 32 are located on the machine rear cover 3. When the machine rear cover 3 is buckled with the machine body 2, the downward linear motion of the first trigger 31 and the second trigger 32 is converted into the rotation of the rubber roller bracket 23 and the unlocking block 24.

[0046] Based on the above unlocking principle of the present invention, those skilled in the art know that as long as a trigger is provided on the label printer, whether the trigger is provided on the machine body 2 or the machine rear cover 3, the same function can be achieved. In addition, based on the above principle, it can also be replaced by converting the downward linear motion of the first trigger 31 and the second trigger 32 into the sliding of the rubber roller bracket 23 and the unlocking block 24; or converting the rotation of the first trigger 31 and the second trigger 32 into the rotation or sliding of the rubber roller bracket 23 and the unlocking block 24 to achieve the purpose of unlocking.

[0047] In addition, in the above embodiment, it is preferably adopted that the first trigger and the second trigger are triggered asynchronously. The first trigger is the first trigger piece, and the second trigger is the second trigger piece. In this way, the rubber roller can be pressed first and then unlocked, avoiding the positioning change during the process. Of course, as an alternative, the first trigger and the second trigger can also be triggered synchronously.

[0048] To sum up, a label printer with a sticker positioning and unlocking function according to the present invention, before printing, the sticker in the label box is positioned at a stable and accurate position. After the label box is installed in the machine, on the basis that the accurate position of the sticker positioning does not change, the positioning function of the sticker is unlocked, the power required during printing does not increase, and the sticker is pressed by the print head and the rubber roller for printing, ensuring accurate printing position and avoiding unnecessary sticker waste. When printing is completed and the label box consumables are taken out, the sticker positioning function continues to effectively press and restrain the sticker, always ensuring that the sticker is positioned at the accurate position required for printing, improving the sticker utilization rate.

[0049] The above are only preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Those skilled in the art can make some simple modifications, equivalent changes or decorations using the disclosed technical content above, and all fall within the protection scope of the present invention.

Claims

1. A label printer with a sticker positioning and unlocking function, characterized in that, it includes a machine body, a label cassette for being built in the machine body, and a machine rear cover installed on the machine body; the label cassette positions the sticker by using a paper pressing elastic arm that can rotate around the center. When the label cassette is built in the machine body and the machine rear cover is installed on the machine body, a rubber roller in the machine body presses the sticker tightly against the print head in the machine body, and then the positioning function of the paper pressing elastic arm is triggered and unlocked; the label cassette includes a housing for placing the sticker paper roll. A sticker channel is arranged at a position close to one side in the housing, and the paper pressing elastic arm is installed at the housing outside the sticker channel; the paper pressing elastic arm includes a paper pressing arm and a driving elastic arm, and the paper pressing arm and the driving elastic arm are connected so that the paper pressing elastic arm can rotate around the connection center of the two. The paper pressing elastic arm is rotatably connected to the housing at the connection center; at the housing outside the sticker channel, at a position corresponding to the end of the driving elastic arm, a driving elastic arm end positioning part is arranged; at the housing inside the sticker channel, at a position corresponding to the end of the paper pressing arm, a rib or a vertical wall is arranged; when the driving elastic arm is installed at the driving elastic arm end positioning part, under the action of the driving elastic arm, the end of the paper pressing arm can press the sticker tightly against the rib or the vertical wall; when the driving elastic arm receives a pressure towards the inside of the housing, driven by the driving elastic arm, the paper pressing arm can rotate around the connection center, so that the end of the paper pressing arm disengages from the rib or the vertical wall; inside the machine body, the rubber roller is installed on a rubber roller bracket, and the rubber roller bracket is movably installed on the side of the machine body; at a position on the side of the machine body corresponding to the paper pressing elastic arm of the label cassette, an unlocking pressing block is movably installed; a first trigger and a second trigger are arranged on the machine body or the machine rear cover; the first trigger and the second trigger are two downward wedge-shaped structures located on the side of the machine rear cover; wherein, the first trigger is a long wedge structure, and the second trigger is a short wedge structure; when pressing the machine rear cover down onto the machine body, the first trigger contacts the rubber roller bracket first, driving the rubber roller to press the sticker tightly against the print head; the second trigger contacts the unlocking pressing block later, triggering the unlocking pressing block to press the elastic end of the paper pressing elastic arm inward, and further driving the other end of the paper pressing elastic arm to tilt up and disengage from the sticker.

2. The label printer with a sticker positioning and unlocking function according to claim 1, characterized in that, in the label cassette, the driving elastic arm end positioning part is a protruding column on the housing, and after the driving elastic arm is toggled to generate elastic force, it is caught on the protruding column of the housing; at both upper and lower ends of the connection center of the paper pressing arm and the driving elastic arm, protruding positioning columns are arranged. The paper pressing arm and the driving elastic arm rotate with the upper and lower two positioning columns as the centers, and the corresponding positions on the housing are provided with positioning holes corresponding to the upper and lower two positioning columns; or a positioning through hole is arranged at the connection center of the paper pressing arm and the driving elastic arm, and a positioning shaft is arranged at the position on the housing corresponding to the positioning through hole; the paper pressing arm and the driving elastic arm rotate with the positioning shaft as the center.

3. The label printer with a sticker positioning and unlocking function according to claim 2, It is characterized in that in the label box, the end of the paper pressing arm and the vertical rib or vertical wall adopt a concave-convex matching structure; the end of the driving spring arm is in a hook shape, and the hook faces the inner side of the shell and is caught on the protruding column of the shell; the paper pressing arm is in a plate-like structure, the end of the plate-like structure is bent towards the inner side of the shell, and the bent end is the pressing end; the plate-like structure is an intermediate open plate or a non-open plate.

4. The label printer with a sticker positioning and unlocking function according to claim 1, It is characterized in that the width of the paper pressing arm is smaller than the width of the sticker in the shell and larger than the width of the driving spring arm.

5. The label printer with a sticker positioning and unlocking function according to claim 1, It is characterized in that the driving spring arm of the paper pressing spring arm adopts a metal spring piece, the paper pressing arm adopts a plastic material, and the paper pressing spring arm is an integrally formed structure.

6. The label printer with a sticker positioning and unlocking function according to claim 1, It is characterized in that the rear end of the rubber roller bracket is installed on the machine body through a vertical rotating shaft, and the rubber roller is arranged on the inner side of the front end of the rubber roller bracket; the rear end of the unlocking pressing block is also installed on the vertical rotating shaft; the rubber roller bracket and the unlocking pressing block can rotate around the vertical rotating shaft under the triggering action and can return to the original position when the triggering action is cancelled.

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