Portable printer label paper centering mechanism

Abstract

The utility model provides a kind of portable printer label paper centering mechanism including support plate, and the label paper limiting support of opposite movement direction is symmetrically slid on support plate left and right, and the synchronous centering component for driving two sides label paper limiting support synchronous movement is installed in support plate lower, and synchronous centering component includes synchronous gear, and synchronous gear is rotatably connected in the middle part of support plate bottom surface, and the front and rear sides of synchronous gear are engaged with sliding rack, and two sliding racks are connected with two label paper limiting supports respectively.The utility model is driven by synchronous gear and makes sliding rack slide, so that left and right two horizontally placed U-shaped supports can be centered to form the limiting passage of label paper, reduce the error in horizontal conveying direction when label printing;Meanwhile, the positioning gap on printing paper is inducted and identified by photoelectric sensor, the confirmation of the initial position of printing paper is realized, and then the error in order conveying direction when label printing is reduced.

Description

Technical Field

[0001] This utility model relates to a label paper centering mechanism for a portable printer. Background Technology

[0002] Labels are widely used in industrial and commercial environments, such as for product identification, traceability, logistics management, information classification and recording. Printers quickly print blank labels, allowing for rapid identification of product names, prices, origins, and other information. However, existing labels often suffer from the problem of printers failing to print text in the designated positions. This is due to two factors: 1. The printer's input slot width is fixed, but the paper cannot be visually positioned precisely in the center of the input slot; 2. The printer cannot accurately position the paper, causing printing to begin before the paper enters the printing area or after it has left the print head, resulting in the text not effectively landing in the required position on the paper. Utility Model Content

[0003] In view of this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a label paper centering mechanism for a portable printer.

[0004] This utility model is achieved by the following scheme: a portable printer label paper centering mechanism includes a support plate, on which label paper limiting brackets with opposite directions of movement are symmetrically slidably connected, and a synchronous centering component for driving the label paper limiting brackets on both sides to move synchronously is installed under the support plate.

[0005] Furthermore, the synchronous centering component includes a synchronous gear, which is rotatably connected to the center of the bottom surface of the support plate. Sliding racks are meshed on the front and rear sides of the synchronous gear, and the two sliding racks are respectively connected to two label paper limiting brackets.

[0006] Furthermore, a vertical gear mounting post is provided on the center of the bottom surface of the support plate, the synchronous gear is sleeved on the gear mounting post, and a gear limiting plate is bolted to the end of the gear mounting post. An O-ring is clamped between the gear limiting plate and the end face of the synchronous gear.

[0007] Furthermore, the sliding rack includes a rack portion that meshes with a synchronous gear. The rack portion is provided with a sliding part, one end of which is fixed to the corresponding label paper limiting bracket, and a limiting block is installed on the upper part of the other end.

[0008] Furthermore, the support plate is provided with a clearance groove corresponding to the movement trajectory of the limiting block, and the middle part of the clearance groove is provided with an avoidance sliding opening corresponding to the sliding part.

[0009] Furthermore, the label paper limiting bracket includes a sliding seat, which slides onto the upper surface of the support plate, and one end of the sliding part is fixed under the corresponding sliding seat.

[0010] Furthermore, the support plate is provided with guide grooves symmetrically arranged on the left and right sides of the middle part, and the lower part of the sliding seat is provided with guide sliders corresponding to the guide grooves. The sliding seat is provided with clearance openings corresponding to the limiting blocks on the sliding part under another sliding seat.

[0011] Furthermore, an L-shaped limiting block is provided on the sliding seat, with the horizontal part of the L-shaped limiting block on top and the vertical part on the bottom. The horizontal part of the L-shaped limiting block faces the middle of the support plate, and the vertical part of the L-shaped limiting block is fixed on the sliding seat. A guide baffle is provided on the side of the sliding seat, and the guide baffle is integrated with the vertical part of the L-shaped limiting block. A photoelectric sensor is provided on the horizontal part of the L-shaped limiting block and on the sliding seat respectively.

[0012] Furthermore, the rear end of the sliding seat is an arc-shaped guide surface.

[0013] Furthermore, the bottom of the support plate is provided with a plurality of connecting posts, and the ends of the connecting posts are provided with snap-fit ​​protrusions or snap-fit ​​grooves.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By using a synchronous gear to drive the sliding rack to slide, the horizontal U-shaped bracket composed of the two L-shaped limit blocks on the left and right and the sliding seat can be centered to form a limiting channel for the label paper, reducing the error in the horizontal conveying direction during label printing. 2. The horizontal part of the L-shaped limiting block and the corresponding photoelectric sensors on the sliding seat are used to sense and identify the positioning gap on the printing paper, thereby confirming the initial position of the printing paper and reducing the error in the conveying direction during label printing. Attached Figure Description

[0015] Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 ; Figure 2 This is a three-dimensional illustration of the present invention. Figure 2 ; Figure 3 This is a three-dimensional sectional view of the present invention; Figure 4 This is a three-dimensional schematic diagram of the label paper limiting bracket of this utility model; Figure 5 This is a schematic diagram of the usage state of this utility model.

[0016] In the diagram: 0-label paper; 1-support plate; 2-label paper limiting bracket; 3-synchronous centering component; 4-synchronous gear; 5-sliding rack; 6-gear mounting post; 7-gear limiting plate; 8-O-ring; 9-rack section; 10-sliding section; 11-limiting block; 12-yielding groove; 13-avoiding sliding opening; 14-sliding seat; 15-guide groove; 16-guide slider; 17-L-shaped limiting block; 18-guide baffle; 19-photoelectric sensor; 20-arc guide surface; 21-connecting post; 22-clamping protrusion; 23-clamping groove; 24-yielding opening. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this patent. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] like Figure 1-5 As shown, a label paper centering mechanism for a portable printer includes a support plate 1. Label paper limiting brackets 2, with opposite directions of movement, are symmetrically slidably mounted on the support plate. A synchronous centering component 3 is installed under the support plate to drive the label paper limiting brackets on both sides to move synchronously. In use, the synchronous centering component drives the two label paper limiting brackets to move synchronously inward or outward, thereby allowing the label paper 0 to enter the printer through the limiting channel formed by the two label paper limiting brackets, thus reducing the problem of text not being printed in the designated position due to deviations in the paper's entry position and achieving accurate printing.

[0021] In this embodiment, in order to enable the two label paper limiting brackets to move inward or outward synchronously, the synchronous centering component includes a synchronous gear 4, which is rotatably connected to the center of the bottom surface of the support plate. Sliding racks 5 are meshed on the front and rear sides of the synchronous gear. The two sliding racks are respectively connected to the two label paper limiting brackets. In use, the synchronous gear rotates to drive the two sliding racks to move in opposite directions, thereby driving the two label paper limiting brackets to move in opposite directions.

[0022] In this embodiment, to achieve the rotation of the synchronous gear, a vertical gear mounting post 6 is provided on the center of the bottom surface of the support plate. The synchronous gear is sleeved on the gear mounting post, and a gear limiting plate 7 is bolted to the end of the gear mounting post. The synchronous gear is fixed between the bottom surface of the support plate and the gear limiting plate through the gear limiting plate, providing a basis for the rotation of the synchronous gear. In order to ensure that the synchronous gear is fixed in the required position under normal conditions, an O-ring 8 is sandwiched between the gear limiting plate and the end face of the synchronous gear. That is, the gear limiting plate abuts against the O-ring, the O-ring abuts against the end face of the synchronous gear, and the other end face of the synchronous gear abuts against the bottom surface of the support plate. The O-ring provides a frictional force to the end face of the synchronous gear, so that the synchronous gear can be fixed in the required position. When it is necessary to open the two label paper limiting brackets, as long as a force that can overcome the friction is provided to pull one of the label paper limiting brackets to move, the other label paper limiting bracket can move synchronously in the opposite direction under the action of the synchronous gear.

[0023] In this embodiment, to achieve the sliding of the sliding rack, the sliding rack includes a rack portion 9, which meshes with a synchronous gear. A sliding portion 10 is provided on the rack portion. One end of the sliding portion is fixed to the corresponding label paper limiting bracket, and a limiting block 11 is installed on the upper part of the other end. A clearance groove 12 is provided on the support plate corresponding to the movement trajectory of the limiting block. An avoidance sliding opening 13 is provided in the middle of the clearance groove corresponding to the sliding portion, that is, the sliding portion slides into the avoidance sliding opening. Inside the opening, the limiting block slides onto the bottom of the clearance groove, and the label limiting bracket slides onto the support plate. The limiting block and the label limiting bracket together support the sliding part on the clearance sliding opening, so that the sliding part can slide on the clearance sliding opening. At the same time, in order to facilitate the installation of the sliding rack, one end of the clearance groove passes through the support plate, and the clearance sliding opening at that end also passes through the end of the clearance groove, so that when the sliding rack is installed, the sliding part and the limiting block can slide into the clearance sliding opening and the clearance groove.

[0024] In this embodiment, in order to realize the label paper limiting bracket sliding on the support plate, the label paper limiting bracket includes a sliding seat 14, which slides on the upper surface of the support plate. One end of the sliding part is fixed under the corresponding sliding seat. The support plate has guide grooves 15 symmetrically arranged on the left and right sides of the middle part. The lower part of the sliding seat is provided with a guide slider 16 corresponding to the guide groove. The cooperation between the guide slider and the guide groove further realizes that the label paper limiting bracket can slide smoothly on the support plate. The sliding seat is provided with a clearance opening 24 corresponding to the limiting block on the sliding part under the other sliding seat. That is, since the two sliding racks move in opposite directions, when both sliding racks move inward, there is a possibility of collision and interference between the limiting block and the other sliding seat. Therefore, the sliding seat is provided with a clearance opening corresponding to the limiting block on the other sliding seat.

[0025] In this embodiment, to achieve a limiting channel formed by the two label paper limiting brackets and reduce errors in the horizontal conveying direction during label printing, an L-shaped limiting block 17 is provided on the sliding seat. The horizontal part of the L-shaped limiting block is on top and the vertical part is on the bottom. The horizontal part of the L-shaped limiting block faces the middle of the support plate, and the vertical part of the L-shaped limiting block is fixed to the outer edge of the sliding seat, so that the L-shaped limiting block and the sliding seat form a horizontal U-shaped bracket. The opening of the U-shaped bracket faces the middle of the support plate, and the two U-shaped brackets together form a limiting channel. To further achieve guiding and limiting, a guide baffle 18 is provided on the side of the sliding seat. The guide baffle is integrated with the vertical part of the L-shaped limiting block. At the same time, in order to confirm the position of the label paper on the label roll in the forward conveying direction, so as to facilitate accurate printing and reduce printing errors in the forward conveying direction, photoelectric sensors 19 are correspondingly provided on the horizontal part of the L-shaped limiting block and the sliding seat. The photoelectric sensors sense and identify the positioning notch on the printing paper to confirm the initial position of the printing paper.

[0026] In this embodiment, to facilitate the output of printing paper, the rear end of the sliding seat is an arc-shaped guide surface 20.

[0027] In this embodiment, to facilitate the installation of the support plate, a plurality of connecting posts 21 are provided on the bottom of the support plate, and the ends of the connecting posts are provided with snap-fit ​​protrusions 22 or snap-fit ​​grooves 23. Corresponding grooves and protrusions are provided on the printer to facilitate fixing.

[0028] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solutions of this utility model. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this utility model.

[0029] If the terms "first" or "second" are used in this document to specify components, those skilled in the art should know that the use of "first" or "second" is merely for the purpose of distinguishing components in description, and unless otherwise stated, the above terms have no special meaning.

[0030] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured by integral molding using a casting process) (except where it is obviously impossible to use an integral molding process).

[0031] Furthermore, the orientations or positional relationships indicated by terms such as "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in any of the technical solutions disclosed in this utility model are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this patent. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent. In addition, unless otherwise stated, the terms used to indicate shape in any of the technical solutions disclosed in this utility model include shapes that are similar to, close to, or approximate with it.

[0032] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A portable printer label sheet centering mechanism characterized by: It includes a support plate, on which label paper limiting brackets with opposite directions of movement are symmetrically slidably connected. A synchronous centering component for driving the label paper limiting brackets on both sides to move synchronously is installed under the support plate.

2. The label paper centering mechanism of claim 1, wherein: The synchronous centering component includes a synchronous gear, which is rotatably connected to the center of the bottom surface of the support plate. Sliding racks are meshed on the front and rear sides of the synchronous gear, and the two sliding racks are respectively connected to two label paper limiting brackets.

3. The label paper centering mechanism of claim 2, wherein: A vertical gear mounting post is provided on the center of the bottom surface of the support plate. The synchronous gear is sleeved on the gear mounting post. A gear limiting plate is bolted to the end of the gear mounting post. An O-ring is clamped between the gear limiting plate and the end face of the synchronous gear.

4. The label paper centering mechanism of claim 2, wherein: The sliding rack includes a rack section that meshes with a synchronous gear. A sliding part is provided on the rack section. One end of the sliding part is fixed to the corresponding label paper limiting bracket, and a limiting block is installed on the upper part of the other end.

5. The label paper centering mechanism of claim 4, wherein: The support plate is provided with a clearance groove corresponding to the movement trajectory of the limiting block, and an avoidance sliding opening is provided on the middle part of the clearance groove corresponding to the sliding part.

6. A label paper centering mechanism according to any one of claims 4 or 5, characterized in that: The label paper limiting bracket includes a sliding seat, which slides on the upper surface of the support plate, and one end of the sliding part is fixed under the corresponding sliding seat.

7. The label paper centering mechanism of claim 6, wherein: The support plate has symmetrical guide grooves on the left and right sides of the middle part, and the lower part of the sliding seat has a guide slider corresponding to the guide groove. The sliding seat has a clearance opening corresponding to the limiting block on the sliding part under another sliding seat.

8. The label paper centering mechanism of claim 6, wherein: An L-shaped limiting block is provided on the sliding seat. The horizontal part of the L-shaped limiting block is on top and the vertical part is on the bottom. The horizontal part of the L-shaped limiting block faces the middle of the support plate. The vertical part of the L-shaped limiting block is fixed on the sliding seat. A guide baffle is provided on the side of the sliding seat. The guide baffle is integrated with the vertical part of the L-shaped limiting block. A photoelectric sensor is provided on the horizontal part of the L-shaped limiting block and on the sliding seat respectively.

9. The label paper centering mechanism of claim 6, wherein: The rear end of the sliding seat is an arc-shaped guide surface.

10. The label sheet centering mechanism of any of claims 1-5, wherein: The bottom of the support plate is provided with several connecting posts, and the ends of the connecting posts are provided with snap-fit ​​protrusions or snap-fit ​​grooves.

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