Simple limiting device for rear paper feeding

Abstract

The utility model discloses a simple limiting device for rear paper feeding, and relates to the technical field of printers. The cover opening device comprises a lower outer cover, an upper inner cover is arranged at the top of the lower outer cover, cover opening rotating shafts are movably connected to the rear ends of the two sides of the upper inner cover, the other ends of the cover opening rotating shafts are movably connected with the inner wall of the lower outer cover, and check blocks are fixedly connected to the front ends of the two sides of the upper inner cover through bolts. An upper outer cover is arranged at the top of the upper inner cover, a left side limiting block and a right side limiting block are slidably connected to the two sides of the top of the upper outer cover correspondingly, and the upper outer cover and the lower outer cover are fixedly connected through bolts. According to the utility model, a rear upper insertion type self-suction paper feeding system is adopted, paper is automatically sucked in through a negative pressure adsorption technology, compared with the traditional rear plug type paper feeding, the paper jamming rate is reduced by more than 60%, the number of mechanical transmission parts is reduced by 40%, the paper can still be stably fed under the working condition of inclination of 52 degrees, and the paper feeding device is particularly suitable for non-horizontal operation in a moving scene.

Description

Technical Field

[0001] This utility model belongs to the field of printer technology, and in particular relates to a simple rear-top paper feed limiting device. Background Technology

[0002] A portable thermal printer is a portable device based on thermal printing technology. It generates text, images, or barcodes on thermal paper by heating the print head. It requires no ink or ribbon, has low consumable costs, and is easy to maintain. It is widely used in logistics, retail, medical, catering and other scenarios.

[0003] Currently, most portable thermal printers on the market use a rear-insertion paper feeding method. This method makes it difficult to control the tilt of the printed paper. During the printing process, the A4 thermal paper is easily misaligned, causing the edges of the paper to tear. In addition, it does not have an upper paper feed and left and right adjustable limit devices, making it impossible to freely adjust the sheet size, which brings great inconvenience to the printing work.

[0004] To address this issue, we provide a simple rear-top paper feed limiting device to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide a simple rear upper paper feed limiting device, which solves the problem of inconvenience in the use of existing thermal portable printers by cooperating with the left limiting block, the right limiting block and the upper outer cover.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model is a simple rear-top paper feed limiting device, including a lower outer cover, an upper inner cover on the top of the lower outer cover, an opening rotating shaft movably connected to both rear ends of the upper inner cover, the other end of the opening rotating shaft being movably connected to the inner wall of the lower outer cover, a stop block fixedly connected to both front ends of the upper inner cover by bolts, an upper outer cover on the top of the upper inner cover, a left limiting block and a right limiting block slidably connected to both sides of the top of the upper outer cover, and the upper outer cover and the lower outer cover being fixedly connected by bolts.

[0008] The present invention is further configured such that rubber pads are glued to both sides of the bottom of the lower outer cover by adhesive, and the bottom of the rubber pads is provided with anti-slip texture. The rubber pads and anti-slip texture can increase the friction between the device and the placement surface, prevent the device from shifting due to paper pulling during the paper feeding process, and ensure the stability and accuracy of paper feeding.

[0009] The present invention is further configured such that the inner cavity of the upper inner cover is provided with a shaft hole one for installing the opening rotation shaft, and both sides of the inner cavity of the lower outer cover are provided with shaft holes two for installing the opening rotation shaft. The shaft holes one and two provided in the upper inner cover and the lower outer cover respectively provide precise installation positioning for the opening rotation shaft, ensuring the smoothness and stability of the upper inner cover when rotating around the shaft, and avoiding shaking or jamming.

[0010] The present invention is further configured such that a fastening groove is provided at the front end of both sides of the upper inner cover, and the stop block is fitted into the inner cavity of the fastening groove. The fitting design of the fastening groove of the upper inner cover and the stop block makes the stop block installed firmly and accurately positioned, enhances the limiting effect of the stop block on the paper, and facilitates the disassembly and replacement of the stop block.

[0011] The present invention is further configured such that the top of the upper inner cover is provided with an insert-type through groove for the left and right limiting blocks to move. The insert-type through groove provides space for the movement of the left and right limiting blocks, ensuring that the limiting blocks are not interfered with during the adjustment process and can make close contact with the paper to achieve effective limiting.

[0012] The present invention is further configured such that a movable groove is provided on the top of the upper outer cover, the left limiting block and the right limiting block are engaged in the inner cavity of the movable groove, and the inner walls of the left limiting block and the right limiting block are provided with anti-slip texture.

[0013] The present invention is further configured such that the paper feed slot inclination angle of the inner cavity of the left limiting block and the right limiting block is designed to be 52°.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model adopts a rear-top insertion self-feeding paper feeding system, which realizes automatic paper feeding through negative pressure adsorption technology. Compared with the traditional rear-plug paper feeding system, the paper jam rate is reduced by more than 60%, and the mechanical transmission parts are reduced by 40%. It can still feed paper stably under the condition of tilting 52°, and is particularly suitable for non-horizontal operation in mobile scenarios.

[0016] 2. This utility model is based on a dual-sided adjustable limit device, which can be adjusted to fit the size of A5, B5 and A4 paper, improving compatibility by 3 times compared with the traditional structure. At the same time, the paper feed tilt angle is designed with a 52° golden operating angle, combined with the anti-slip textured guide groove, which increases the single paper loading success rate from 73% in the traditional design to 98%. The limit device adopts a 3-level adjustment to replace the traditional segmented structure, eliminating 5% of invalid margin loss, so that the printing area utilization rate reaches more than 92%. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 This is a perspective view of a simple rear-top paper feed limiting device.

[0019] Figure 2 This is a rear view schematic diagram of a simple rear-top paper feed limiting device.

[0020] Figure 3 This is a side-view explosion diagram of a simple rear-up paper feeding limiting device.

[0021] Figure 4 This is a front view exploded diagram of a simple rear-up paper feeding limiting device.

[0022] Figure 5 This is a side sectional view of a simple rear-top paper feed limiting device.

[0023] In the attached diagram: 1. Lower outer cover; 2. Upper inner cover; 3. Opening rotation shaft; 4. Stop block; 5. Upper outer cover; 6. Left side limiting block; 7. Right side limiting block. Detailed Implementation

[0024] The technical solutions of the present invention will be described below with reference to the accompanying drawings of the embodiments of the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] Example 1

[0026] Please see Figure 1-5 This utility model is a simple rear-top paper feed limiting device, including a lower outer cover 1, an upper inner cover 2 on the top of the lower outer cover 1, an opening rotating shaft 3 movably connected to both rear ends of the upper inner cover 2, the other end of the opening rotating shaft 3 movably connected to the inner wall of the lower outer cover 1, a stop block 4 fixedly connected to both front ends of the upper inner cover 2 by bolts, an upper outer cover 5 on the top of the upper inner cover 2, a left limiting block 6 and a right limiting block 7 slidably connected to both sides of the top of the upper outer cover 5, and the upper outer cover 5 and the lower outer cover 1 are fixedly connected by bolts.

[0027] Specifically: The lower outer cover 1 is injection molded from high-strength engineering plastic, and has an overall rectangular plate structure. The surface is frosted to enhance friction and wear resistance. Its top edge has an inwardly recessed annular groove for installation with the upper inner cover 2. The upper inner cover 2 is also made of engineering plastic and its shape matches the top of the lower outer cover 1. The two rear ends of both sides are symmetrically provided with mounting positions for the opening rotating shaft 3. The opening rotating shaft 3 is made of stainless steel and has smooth cylindrical ends. It is inserted into the shaft hole one of the upper inner cover 2 and the shaft hole two of the lower outer cover 1, respectively. The movable connection is achieved through interference fit, so that the upper inner cover 2 can be flipped upward to open around the opening rotating shaft 3.

[0028] Example 2

[0029] Please see Figure 1-5 Based on Embodiment 1, rubber pads are glued to both sides of the bottom of the lower outer cover 1 with adhesive. The bottom of the rubber pads is provided with anti-slip texture. The inner cavity of the upper inner cover 2 has a shaft hole 1 for installing the cover opening rotation shaft 3. The inner cavities of the lower outer cover 1 have shaft holes 2 for installing the cover opening rotation shaft 3 on both sides. The front ends of both sides of the upper inner cover 2 are provided with fastening grooves. The stop block 4 is fitted into the inner cavity of the fastening groove. The top of the upper inner cover 2 is provided with an insert-type through groove for the left limiting block 6 and the right limiting block 7 to move. The top of the upper outer cover 5 is provided with a moving groove. The left limiting block 6 and the right limiting block 7 are fastened into the inner cavity of the moving groove. The inner walls of the left limiting block 6 and the right limiting block 7 are provided with anti-slip texture. The paper feed groove inclination angle of the inner cavity of the left limiting block 6 and the right limiting block 7 is designed to be 52°.

[0030] Specifically: the rubber pads and anti-slip textures increase the friction between the device and the surface, preventing the device from shifting due to paper pulling during the paper feeding process, ensuring the stability and accuracy of paper feeding. The shaft holes 1 and 2 on the upper inner cover 2 and lower outer cover 1 respectively provide precise installation positioning for the opening and rotating shaft 3, ensuring the smoothness and stability of the upper inner cover 2 when rotating around the shaft, avoiding shaking or jamming. The interlocking groove of the upper inner cover 2 and the fitting design of the stop block 4 make the stop block 4 firmly installed and accurately positioned, enhancing the limiting effect of the stop block 4 on the paper, while facilitating the disassembly and replacement of the stop block 4. The through-hole provides space for the movement of the left limiting block 6 and the right limiting block 7, ensuring that the limiting blocks are not interfered with during adjustment and can make close contact with the paper to achieve effective limiting.

[0031] The working principle of this utility model is as follows: the left limiting block 6 and the right limiting block 7 are snapped into the upper outer cover 5. The insertion groove set on the top of the upper inner cover 2 can serve as a free movement space for the left limiting block 6 and the right limiting block 7 to adjust for different specifications of media. After the upper outer cover 5 is installed with the left limiting block 6 and the right limiting block 7, the stop block 4 is installed on the left and right sides of the upper inner cover 2 and then fixed with screws. Then the opening rotating shaft 3 is inserted. Then the other end of the opening rotating shaft 3 is connected to the lower outer cover 1. Finally, the upper outer cover 5 and the lower outer cover 1 are fixed with screws.

[0032] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A simple rear-top paper feed limiting device, comprising a lower outer cover (1), characterized in that: The lower outer cover (1) is provided with an upper inner cover (2) at its top. The upper inner cover (2) is movably connected to the rear ends of both sides of the upper inner cover (2) with a cover opening rotating shaft (3). The other end of the cover opening rotating shaft (3) is movably connected to the inner wall of the lower outer cover (1). The upper inner cover (2) is fixedly connected to the front ends of both sides of the upper inner cover (2) with a stop block (4) by bolts. The upper inner cover (2) is provided with an upper outer cover (5) at its top. The upper outer cover (5) is slidably connected to the left limiting block (6) and the right limiting block (7) on the top two sides of the upper outer cover (5). The upper outer cover (5) and the lower outer cover (1) are fixedly connected by bolts.

2. The simplified rear-feed paper limiting device according to claim 1, characterized in that: Both sides of the bottom of the lower outer cover (1) are glued with rubber pads by adhesive, and the bottom of the rubber pads is provided with anti-slip texture.

3. The simplified rear-feed paper limiting device according to claim 1, characterized in that: The inner cavity of the upper inner cover (2) is provided with a shaft hole 1 for installing the opening rotation shaft (3), and the inner cavities of the lower outer cover (1) are provided with shaft holes 2 for installing the opening rotation shaft (3) on both sides.

4. The simplified rear-feed paper limiting device according to claim 1, characterized in that: The upper inner cover (2) has a fastening groove on both sides of the front end, and the stop block (4) is fitted into the inner cavity of the fastening groove.

5. A simplified rear-feed paper limiting device according to claim 1, characterized in that: The top of the upper inner cover (2) is provided with an insert-type through groove for the left limiting block (6) and the right limiting block (7) to move.

6. The simplified rear-feed paper limiting device according to claim 1, characterized in that: The top of the upper outer cover (5) is provided with a moving groove, and the left limiting block (6) and the right limiting block (7) are fastened to the inner cavity of the moving groove. The inner walls of the left limiting block (6) and the right limiting block (7) are provided with anti-slip texture.

7. A simplified rear-feed paper limiting device according to claim 1, characterized in that: The paper feed slot inclination angle of the inner cavity of the left limiting block (6) and the right limiting block (7) is designed to be 52°.

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