Photo paper pressing mechanism and printer

Abstract

The photo paper pressing mechanism comprises a main frame body and a roller frame, the main frame body is respectively provided with elastic clamping blocks at two sides of a paper feeding channel, two side edges of the roller frame are respectively provided with clamping parts, the clamping parts are clamped into the elastic clamping blocks at the corresponding sides, and the elastic clamping blocks are clamped into the roller frame. A plurality of rollers are arranged on the roller carrier in the transverse direction perpendicular to the paper feeding direction of the paper feeding channel. The elastic clamping blocks are arranged on the two sides of the paper feeding channel of the main frame body, the clamping parts on the two side edges of the roller frame can be directly clamped into the corresponding elastic clamping blocks, complex locking operation can be carried out without the help of additional locking pieces, the assembling steps are greatly simplified, and the assembling efficiency is improved; the roller carrier is provided with the plurality of rollers along the transverse direction perpendicular to the paper feeding direction of the paper feeding channel, and the plurality of rollers can apply pressure to the paper more uniformly, so that the paper is kept flat in the paper feeding channel, the problem of warping of two sides of the paper is effectively avoided, and the printing quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of printer technology, and in particular to a photo paper pressing mechanism and printer. Background Technology

[0002] Existing printer paper pressing mechanisms use a roller frame, with a connecting part on the printer's main frame to connect the roller frame. A locking device is then inserted into the connecting part to lock the roller frame in place, making the assembly process rather cumbersome. Furthermore, the rollers on the roller frame are usually installed in the center of the paper feed channel, which can easily cause the paper to warp on both sides, affecting print quality, as shown in patent document CN2722527Y. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this utility model is to provide a photo sheet pressing mechanism and a printer.

[0004] This utility model is implemented by the following method: a photo paper pressing mechanism, including a main frame and a roller frame. The main frame is provided with elastic locking blocks on both sides of the paper feeding channel. The roller frame is provided with locking parts on both sides. The locking parts are locked into the elastic locking blocks on the corresponding sides. Multiple rollers are arranged on the roller frame in a transverse direction perpendicular to the paper feeding direction of the paper feeding channel.

[0005] Preferably, the elastic snap-fit ​​block is provided with a snap-fit ​​groove, and the snap-fit ​​part snaps into the snap-fit ​​groove.

[0006] Preferably, a guide groove is provided between the end face of the elastic snap block facing away from the main frame and the snap groove, and the snap part slides into the snap groove through the guide groove.

[0007] Preferably, the snap-fit ​​portion is a cylindrical shaft provided on the side of the roller frame; the depth of the guide groove gradually decreases from the end face to the end near the snap-fit ​​groove, and the cylindrical shaft slides into the snap-fit ​​groove from the guide groove.

[0008] Preferably, the roller frame is provided with a plurality of mounting seats, and one roller is installed in each mounting seat.

[0009] Preferably, the mounting base is disposed on the surface of the roller frame opposite to the paper feed end of the paper feed channel; each mounting base includes two symmetrically arranged connecting arms, each connecting arm having a slot, the inlet end of the slot being disposed on the end face opposite to the paper feed inlet of the paper feed channel, at least one side of the slot being an elastic arm, facilitating insertion into the roller shaft under force deformation, and the size of the inlet end of the slot being smaller than the diameter of the roller shaft in the initial state.

[0010] Preferably, elastic members are connected to both sides of the roller frame near the paper feed end of the paper feeding channel. One end of the elastic member abuts against the main frame, and the other end of the elastic member abuts against the roller frame, for pushing the roller frame away from the main frame.

[0011] Preferably, both sides of the roller frame are provided with protruding abutments near the paper feed end of the paper feeding channel, and the main frame is provided with mounting holes opposite to the abutments, the mounting holes for mounting the elastic element.

[0012] Preferably, the main frame body is provided with a limiting groove at a position opposite to the side of the abutment top, and the side of the abutment top facing the limiting groove is provided with a limiting rib, which passes through the limiting groove.

[0013] A printer having a photo sheet pressing mechanism as described above.

[0014] The beneficial effects of this utility model are as follows: This utility model provides a photo sheet pressing mechanism and a printer, which, compared with the prior art, have at least the following technical effects:

[0015] 1. In existing technologies, the roller frame is locked to the main frame by locking components, which is cumbersome to assemble. However, the main frame of this invention has elastic locking blocks on both sides of the paper feed channel. The locking parts on both sides of the roller frame can directly engage with the corresponding elastic locking blocks, eliminating the need for additional locking components for complex locking operations. This greatly simplifies the assembly process and improves assembly efficiency. Existing roller frames typically have one roller installed in the center of the paper feed channel, which can easily cause the paper to warp on both sides, affecting print quality. In this invention, the roller frame has multiple rollers arranged in a transverse direction perpendicular to the paper feed direction. Multiple rollers can apply pressure to the paper more evenly, keeping the paper flat in the paper feed channel and effectively avoiding the problem of paper warping on both sides, thereby improving print quality.

[0016] 2. The flexible locking block has a locking groove. After the locking part is engaged in the locking groove, the shape and structure of the locking groove can form a more stable enclosure and limit the locking part. Under the vibration and paper friction generated during printer operation, it can effectively prevent the roller frame from loosening and shifting, ensuring the long-term stable operation of the photo paper pressing mechanism, and thus ensuring the stability of print quality. 3. The end face of the locking block opposite to the main frame is connected to the locking groove by a guide groove. The locking part can smoothly slide into the locking groove through the guide groove. When assembling the roller frame, the guide groove plays a guiding role, making it easier for the locking part to align with the locking groove, reducing the assembly difficulty. Especially in the printer's internal environment with limited space or poor operating visibility, it can effectively improve the success rate and convenience of assembly.

[0017] 4. The locking part is a cylindrical shaft on the side of the roller frame. The cylindrical shaft has a regular shape, is easy to process and manufacture, and fits well with the guide groove and locking groove. The guide groove gradually becomes shallower from the end face to the end near the locking groove. This structural design allows the deformation of the elastic locking block to gradually increase as the cylindrical shaft slides into the guide groove and is gradually pressed in. The elastic locking block does not need to deform to its maximum deformation at the beginning, making it easier for the cylindrical shaft to be inserted into the elastic locking block.

[0018] 5. The roller frame is equipped with multiple mounting seats, and each mounting seat is equipped with a roller. This design clearly defines the installation position of the rollers, which facilitates the individual installation and debugging of the rollers during production and manufacturing. It also facilitates the quick replacement of damaged rollers during subsequent use, reducing maintenance costs and equipment downtime, and improving the maintainability of the equipment.

[0019] 6. The mounting base is located on the surface of the roller frame opposite to the paper feed end of the paper feed path. Each mounting base includes two symmetrically arranged connecting arms. The slot entrance end of the connecting arm is located on the end face opposite to the paper feed inlet of the paper feed path, and at least one side of the slot is a flexible arm. When installing the roller, the roller shaft can be directly aligned with the slot entrance. The deformation of the flexible arm allows the roller shaft to be smoothly inserted into the slot without the need for complicated tightening operations using tools, greatly simplifying the roller installation process and improving assembly efficiency. The size of the slot entrance end is initially smaller than the diameter of the roller shaft. After the roller shaft is inserted, the rebound force of the flexible arm ensures a tight fit between the roller shaft and the slot, effectively preventing the roller from loosening or falling off during operation, ensuring the stable pressing effect of the roller on the paper, and thus guaranteeing print quality.

[0020] 7. Elastic elements are connected to both sides of the roller frame near the paper feed end of the paper path. One end of the elastic element abuts against the main frame, and the other end abuts against the roller frame. Pushing the roller frame away from the main frame causes it to rotate around the locking part, moving the side with the roller closer to the main frame, thus pressing the roller against the rubber roller installed in the main frame. In this way, when paper enters the paper path, the roller maintains appropriate pressure contact with the paper under the action of the elastic elements, ensuring smooth paper feeding and avoiding problems such as paper skewing and paper jams caused by insufficient pressure. At the same time, excessive pressure will not damage the paper or affect print quality, thereby improving the printer's paper feeding reliability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a photo-pressing sheet mechanism according to this utility model.

[0022] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0023] Figure 3This is a cross-sectional structural diagram of a photosheet pressing mechanism according to this utility model.

[0024] Figure 4 This is a schematic diagram of the assembly relationship between the roller frame and the roller of this utility model.

[0025] Figure 5 This is a schematic diagram showing the assembly of the roller frame and rollers of this utility model.

[0026] Explanation of reference numerals: 1. Main frame; 2. Roller frame; 3. Elastic snap-fit ​​block; 31. Snap-fit ​​groove; 32. Guide groove; 4. Snap-fit ​​part; 5. Roller; 6. Mounting base; 61. Slot; 62. Elastic arm; 7. Elastic element; 8. Top abutment; 9. Limiting groove; 10. Limiting rib; 11. Rubber roller. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] Please see Figures 1 to 5 A photo paper pressing mechanism includes a main frame 1 and a roller frame 2. The main frame 1 has elastic locking blocks 3 on both sides of the paper feed channel. The roller frame 2 has locking parts 4 on both sides, which engage with the corresponding elastic locking blocks. Multiple rollers 5 are arranged on the roller frame 2 in a transverse direction perpendicular to the paper feed direction. In the prior art, the roller frame 2 is locked to the main frame 1 via a locking mechanism, resulting in cumbersome assembly. However, in this invention, the main frame 1 has elastic locking blocks 3 on both sides of the paper feed channel, and the locking parts 4 on both sides of the roller frame 2 can directly engage with the corresponding elastic locking blocks 3, eliminating the need for additional locking mechanisms and significantly simplifying the assembly process and improving efficiency. Existing roller frames typically have only one roller 5 centrally mounted in the paper feed channel, which can easily cause paper warping on both sides, affecting print quality. The roller frame 2 of this utility model has multiple rollers 5 arranged in a transverse direction perpendicular to the paper feeding direction of the paper feeding channel. The multiple rollers 5 can apply pressure to the paper more evenly, keep the paper flat in the paper feeding channel, effectively avoid the problem of paper warping on both sides, and thus improve the printing quality.

[0029] Please see Figures 1 to 5 Preferably, the elastic snap-fit ​​block 3 is provided with a snap-fit ​​groove 31, and the snap-fit ​​part 4 snaps into the snap-fit ​​groove 31. With the snap-fit ​​groove 31 in the elastic snap-fit ​​block 3, after the snap-fit ​​part 4 snaps into the snap-fit ​​groove 31, the shape and structure of the snap-fit ​​groove 31 can form a more stable enclosure and limit for the snap-fit ​​part 4. Under conditions such as vibration and paper friction generated during printer operation, it can effectively prevent the roller frame 2 from loosening and shifting, ensuring the long-term stable operation of the photo paper pressing mechanism, and thus ensuring the stability of print quality.

[0030] Please see Figures 1 to 5Preferably, a guide groove 32 is provided between the end face of the elastic snap-fit ​​block 3 facing away from the main frame 1 and the snap-fit ​​groove 31, and the snap-fit ​​part 4 slides into the snap-fit ​​groove 31 through the guide groove 32. The guide groove 32 connecting the end face of the elastic snap-fit ​​block 3 facing away from the main frame 1 and the snap-fit ​​groove 31 allows the snap-fit ​​part 4 to slide smoothly into the snap-fit ​​groove 31. During the assembly of the roller frame 2, the guide groove 32 acts as a guide, making it easier for the snap-fit ​​part 4 to align with the snap-fit ​​groove 31, reducing assembly difficulty. This is especially beneficial in the limited space or poor visibility inside the printer, effectively improving the success rate and convenience of assembly.

[0031] Please see Figures 1 to 5 Preferably, the locking part 4 is a cylindrical shaft located on the side of the roller frame 2; the depth of the guide groove 32 gradually decreases from the end face to the end near the locking groove 31, and the cylindrical shaft slides into the locking groove 31 from the guide groove 32. The locking part 4 is a cylindrical shaft on the side of the roller frame 2. The cylindrical shaft has a regular shape, is easy to process and manufacture, and fits well with the guide groove 32 and the locking groove 31. The guide groove 32 gradually decreases in depth from the end face to the end near the locking groove 31. This structural design allows the deformation of the elastic locking block 3 to gradually increase as the cylindrical shaft slides into the guide groove 32 and is gradually pressed in. The elastic locking block 3 does not need to deform to its maximum deformation at the beginning, making it easier for the cylindrical shaft to be inserted into the elastic locking block 3.

[0032] Please see Figures 1 to 5 Preferably, the roller frame 2 is provided with multiple mounting seats 6, and one roller 5 is installed in each mounting seat 6. This design clearly defines the installation positions of the rollers 5, facilitating individual installation and adjustment of the rollers 5 during manufacturing, and also enabling quick replacement of damaged rollers 5 during subsequent use. This reduces maintenance costs and equipment downtime, and improves the maintainability of the equipment.

[0033] Please see Figures 1 to 5Preferably, the mounting base 6 is disposed on the surface of the roller frame 2 opposite to the paper feed end of the paper feed channel; each mounting base 6 includes two symmetrically arranged connecting arms, each connecting arm having a slot 61, the inlet end of the slot 61 being disposed on the end face opposite to the paper feed inlet of the paper feed channel, at least one side of the slot 61 being an elastic arm 62, facilitating insertion into the rotating shaft of the roller 5 under force deformation, and the size of the inlet end of the slot 61 being smaller than the diameter of the rotating shaft of the roller 5 in the initial state. The mounting base 6 is disposed on the surface of the roller frame 2 opposite to the paper feed end of the paper feed channel, and each mounting base 6 includes two symmetrically arranged connecting arms, the inlet end of the slot 61 in the connecting arm being disposed on the end face opposite to the paper feed inlet of the paper feed channel, and at least one side of the slot 61 being an elastic arm 62. When installing roller 5, the roller 5 shaft can be directly aligned with the inlet of slot 61. The deformation of the elastic arm 62 allows the roller 5 shaft to be smoothly inserted into slot 61 without the need for complicated tightening operations using tools. This greatly simplifies the installation process of roller 5 and improves assembly efficiency. The size of the inlet end of slot 61 is initially smaller than the diameter of roller 5 shaft. After roller 5 shaft is inserted, the rebound force of elastic arm 62 allows roller 5 shaft to fit tightly with slot 61, effectively preventing roller 5 from loosening or falling off during operation. This ensures the stable pressing effect of roller 5 on the paper, thereby guaranteeing print quality.

[0034] Please see Figures 1 to 5 Preferably, elastic elements 7 are connected to both sides of the roller frame 2 near the paper feed end of the paper feed channel. One end of the elastic element 7 abuts against the main frame 1, and the other end abuts against the roller frame 2, pushing the roller frame 2 away from the main frame 1. With the elastic elements 7 connected to both sides of the roller frame 2 near the paper feed end of the paper feed channel, and one end of the elastic element 7 abutting against the main frame 1 and the other end abutting against the roller frame 2, the roller frame 2 can be pushed away from the main frame 1. This causes the roller frame 2 to rotate around the locking part 4, and the side where the roller 5 is installed will move closer to the main frame 1, causing the roller 5 to press against the rubber roller 11 installed in the main frame 1. Thus, when the paper enters the paper feed channel, the roller 5, under the action of the elastic elements 7, can always maintain appropriate pressure contact with the paper, ensuring smooth paper feeding and avoiding problems such as paper skewing and paper jams due to insufficient pressure. At the same time, excessive pressure will not damage the paper or affect the printing effect, thereby improving the paper feeding reliability of the printer. The presence of the elastic element 7 enables the roller frame 2 to have a certain elastic compensation function, which can automatically adjust the distance between the roller frame 2 and the main frame 1 according to the thickness of different papers, better adapt to papers of various thicknesses, expand the range of applicable papers for the printer, and enhance the versatility and practicality of the equipment.

[0035] Please see Figures 1 to 5Preferably, both sides of the roller frame 2 are provided with protruding abutment tops 8 near the paper feed end of the paper feeding channel. The main frame 1 has mounting holes opposite to the abutment tops 8, and the elastic element 7 is installed in these mounting holes. The mounting holes and abutment tops 8 ensure that the elastic element 7 can be accurately and securely installed between the roller frame 2 and the main frame 1, ensuring that the elastic element 7 is subjected to uniform force during operation and exerts its due elastic effect. This also facilitates the disassembly and replacement of the elastic element 7 during manufacturing and maintenance. Preferably, the elastic element 7 can be a spring, torsion spring, etc., but is not limited to these.

[0036] Please see Figures 1 to 5 Preferably, the main frame 1 is provided with a limiting groove 9 at a position opposite to the side of the abutment 8, and the side of the abutment 8 facing the limiting groove 9 is provided with a limiting rib 10, which passes through the limiting groove 9. The cooperation of the limiting groove 9 and the limiting rib 10 can guide and limit the movement of the roller frame 2, thereby limiting the swing range of the roller frame 2 around the cylindrical axis.

[0037] Please see Figures 1 to 5 Preferably, in this embodiment, there are two mounting bases 6, which are respectively located on the left and right sides of the front side of the paper feeding channel of the roller frame 2 in the paper feeding direction.

[0038] A printer is provided with a photo paper pressing mechanism as described above. Compared to the prior art where the roller frame 2 is locked to the main frame 1 by a locking component, resulting in cumbersome assembly, the main frame 1 of this invention has elastic locking blocks 3 on both sides of the paper feed channel. The locking parts 4 on both sides of the roller frame 2 can directly engage with the corresponding elastic locking blocks 3, eliminating the need for additional locking components and simplifying the assembly process, thus improving assembly efficiency. In existing printers, the roller frame 2 typically has one roller 5 centrally mounted in the paper feed channel, which can easily cause the paper to warp on both sides, affecting print quality. In this invention, the roller frame 2 has multiple rollers 5 arranged in a transverse direction perpendicular to the paper feed direction. These multiple rollers 5 can apply pressure to the paper more evenly, keeping the paper flat within the paper feed channel and effectively preventing warping on both sides, thereby improving print quality.

[0039] The working principle of this utility model is as follows:

[0040] When assembling rollers 5 and roller brackets 2, align the axles at both ends of rollers 5 with the slots 61 of the connecting arms on both sides of the mounting base 6, and press the axles of rollers 5 to deform the elastic arms 62 so that the axles can be inserted into the slots 61. Repeat this process to complete the installation of all rollers 5.

[0041] A spring is inserted into the mounting hole of the main frame 1. Then, the large cylindrical shafts on the middle of both sides of the roller frame 2 are aligned with the guide grooves 32 on the elastic locking blocks 3 on both sides of the paper feeding channel. Force is applied to press the roller frame 2 towards the main frame 1. The elastic locking blocks 3, under the thrust received by the inclined surface of the guide grooves 32, bend and deform in the direction away from the paper feeding channel until the cylindrical shaft slides into the locking groove 31. The elastic locking blocks 3 then lose their pressing force and reset, and the locking groove 31 can then limit the cylindrical shaft of the roller frame 2 (the locking groove 31 is away from the main frame 1). The side is semi-circular, which makes the roller frame 2 rotate more smoothly around the cylindrical axis. It is necessary to press the limiting rib 10 into the limiting groove 9. At this time, one end of the spring abuts against the inner end face of the mounting hole, and the other end abuts against the top and bottom. The spring pushes the roller frame 2, causing the end of the roller frame 2 facing the paper feeding channel inlet to be pushed away from the main frame 1, while the end away from the inlet side is pushed towards the main frame 1, so that the roller 5 can be in close contact with the rubber roller 11 in the main frame 1, so that the roller 5, the rubber roller 11 and the paper are in close contact to generate sufficient friction to push the paper.

[0042] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0043] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0044] Finally, the above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions that fall within the scope of the present utility model are protected by the present utility model.

[0045] It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of this utility model should also be considered within the scope of protection of this utility model.

Claims

1. A photo paper pressing mechanism, comprising a main frame and a roller frame, characterized in that: The main frame is provided with elastic locking blocks on both sides of the paper feeding channel, and the roller frame is provided with locking parts on both sides. The locking parts are locked into the elastic locking blocks on the corresponding sides. Multiple rollers are arranged on the roller frame in a transverse direction perpendicular to the paper feeding direction of the paper feeding channel.

2. The photo pressing paper mechanism according to claim 1, characterized in that: The elastic snap-fit ​​block is provided with a snap-fit ​​groove, and the snap-fit ​​part snaps into the snap-fit ​​groove.

3. The photo pressing paper mechanism according to claim 2, characterized in that: The end face of the elastic snap block facing away from the main frame is connected to the snap groove by a guide groove, and the snap part slides into the snap groove through the guide groove.

4. The photo pressing paper mechanism according to claim 3, characterized in that: The snap-fit ​​part is a cylindrical shaft provided on the side of the roller frame; the depth of the guide groove gradually decreases from the end face to the end near the snap-fit ​​groove, and the cylindrical shaft slides into the snap-fit ​​groove from the guide groove.

5. The photo pressing paper mechanism according to claim 1, characterized in that: The roller frame is provided with multiple mounting seats, and one roller is installed in each mounting seat.

6. The photo pressing paper mechanism according to claim 5, characterized in that: The mounting base is disposed on the surface of the roller frame opposite to the paper feed end of the paper feed channel; each mounting base includes two symmetrically arranged connecting arms, each connecting arm having a slot, the inlet end of the slot being disposed on the end face opposite to the paper feed inlet of the paper feed channel, at least one side of the slot being an elastic arm, facilitating insertion into the roller shaft under force deformation, and the size of the inlet end of the slot being smaller than the diameter of the roller shaft in the initial state.

7. The photo pressing paper mechanism according to claim 1, characterized in that: Elastic members are connected to both sides of the roller frame near the paper feed end of the paper feeding channel. One end of the elastic member abuts against the main frame, and the other end of the elastic member abuts against the roller frame, which is used to push the roller frame away from the main frame.

8. The photo pressing paper mechanism according to claim 7, characterized in that: Both sides of the roller frame are provided with protruding abutments near the paper feed end of the paper feeding channel. The main frame is provided with mounting holes opposite to the abutments, and the elastic element is installed in the mounting holes.

9. A photo pressing paper mechanism according to claim 8, characterized in that: The main frame is provided with a limiting groove at a position opposite to the side of the abutment top, and a limiting rib is provided on the side of the abutment top facing the limiting groove, and the limiting rib passes through the limiting groove.

10. A printer, characterized in that: The device is equipped with a pressing sheet paper mechanism as described in any one of claims 1-9.

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