Printer paper width adjusting structure with self-locking function

Abstract

The utility model provides a printer paper width adjusting structure with a self-locking function, and the structure comprises a paper bin which comprises a containing groove, and an adjusting groove is formed in one side of the containing groove; the two ends of the guide rod are detachably arranged in the adjusting grooves and are parallel to the axial mounting direction of the printing paper reel; the adjusting guide plate is arranged in the accommodating groove and one side of the adjusting guide plate is slidably connected with the guide rod; the limiting structure is arranged in the adjusting groove and comprises a plurality of limiting clamping points which are distributed in parallel in the axial direction of the guide rod; the part, located in the adjusting groove, of the adjusting guide plate is configured to be matched with one limiting clamping point in a buckled mode so that the position can be fixed, and the part can be twisted and deformed along with the adjusting guide plate so that the part can be disengaged from the buckled state. The failure rate caused by mechanical wear, corrosion or fatigue is reduced; the self-locking function is achieved through cooperation of the adjusting guide plate and the limiting structure, and stable paper width setting can be kept without an additional locking device.

Description

Technical Field

[0001] The utility model relates to the technical field of a paper bin structure of a printer housing, in particular to a printer paper width adjustment structure with a self-locking function. Background Art

[0002] In the modern office environment, printers and fax machines play an indispensable role as important tools for information transmission and recording. One of the core functions of these devices is to accurately and efficiently handle various types of recording media, such as printing paper or documents. In order to ensure the precise alignment and smooth transmission of the media during the printing or faxing process, the equipment is usually equipped with a special paper bin structure. The paper bin not only carries the recording paper, but also positions it in the predetermined position within the device to ensure that the print head or scanning element can perform its tasks accurately.

[0003] For printing papers of different widths, the paper bin structure often needs to have a certain degree of adjustment capability. This is because users may frequently change printing papers of different specifications in daily operations. For this reason, the traditional paper bin design includes a paper width adjustment mechanism to accommodate papers of various widths, thereby enhancing the versatility and user-friendliness of the device.

[0004] However, the paper width adjustment structure in the prior art has some significant limitations, which are mainly manifested in the following two aspects:

[0005] 1. Although the gear rack or screw adjustment mechanism can achieve precise width adjustment, its structure is relatively complex. This complexity means more moving parts, increasing the risk of mechanical wear and failure. After long-term use, the gear, rack or screw may be damaged by friction, corrosion or fatigue, affecting the stability and accuracy of paper width adjustment, thereby reducing the working efficiency and life of the entire equipment.

[0006] 2. The current paper width adjustment structure is often designed as an integrated component that is inseparable from the paper bin body. This means that once the adjustment mechanism fails, users or maintenance personnel may need to replace the entire paper bin structure instead of just the damaged part. This not only increases maintenance costs, but may also lead to extended equipment downtime, affecting business continuity and user experience.

[0007] In view of this, the inventor specially designed a printer paper width adjustment structure with a self-locking function, and this case was thus generated. Utility Model Content

[0008] In order to solve the above problems, the technical solution of the utility model is as follows:

[0009] A printer paper width adjustment structure with a self-locking function, comprising:

[0010] The paper bin is arranged in the printer housing and comprises a receiving groove adapted to the outer curved surface of the printing paper roll, and an adjusting groove is formed on one side of the receiving groove and connected therewith;

[0011] The guide rod has two ends which are detachably arranged in the adjustment slot and are arranged parallel to the axial installation direction of the printing paper roll;

[0012] An adjusting guide plate is arranged in the receiving groove and one side of the adjusting guide plate is slidably connected to the guide rod;

[0013] The limiting structure is arranged in the adjusting groove and includes a plurality of limiting points distributed parallel to the axial direction of the guide rod;

[0014] The portion of the adjustment guide plate located in the adjustment slot is constructed to be able to engage with one of the limit snap points to achieve position fixation and can be twisted and deformed with the adjustment guide plate to escape from the snap state.

[0015] Preferably, a flat surface extends horizontally on one side of the accommodating groove, and a long strip-shaped clamping edge parallel to the guide rod is provided on the side of the flat surface close to the accommodating groove. The flat surface extends upward on the side away from the accommodating groove to form a supporting surface, and the supporting surface, the flat surface and the clamping edge enclose the adjusting groove.

[0016] Preferably, the limit clamping point is formed by the gap between two adjacent limit protrusions, and a plurality of the limit protrusions are distributed at equal intervals along the length direction of the adjustment slot.

[0017] Preferably, the limiting protrusion is in the shape of an elongated strip and is distributed perpendicularly to the axial direction of the guide rod, and there is a clearance gap between the two ends of the limiting protrusion and the two side walls of the adjusting groove.

[0018] Preferably, a first connecting portion is provided on one side of the adjustment guide plate, and abutment surfaces corresponding to the side walls of the card edge and the support surface are formed on both sides of the first connecting portion respectively. A makeshift groove corresponding to the length of the limiting protrusion is recessed inwardly between the two abutment surfaces on the bottom surface of the first connecting portion, and a deformation rib extends horizontally from the bottom of the makeshift groove, and a buckle portion corresponding to the shape of the limiting card point between adjacent limiting protrusions is convexly provided at the bottom of the deformation rib.

[0019] Preferably, a sliding hole which is gap-matched with the guide rod is formed through the top of the first connecting portion in a direction perpendicular to the adjusting guide plate.

[0020] Preferably, two inclined first guide surfaces are symmetrically arranged on the top of the limiting protrusion and on both sides along the width direction thereof, and second guide surfaces adapted to the first guide surfaces are symmetrically formed on both sides of the buckle portion.

[0021] Preferably, it further comprises a fixed guide plate, the fixed guide plate is adapted to the shape of the adjustment guide plate and one side of the fixed guide plate is slidably connected to the guide rod via a second connecting portion.

[0022] Preferably, the surfaces of the fixed guide plate and the adjusting guide plate close to each other are smooth planes, and a fixing sleeve is horizontally protruded outwardly on the surface of the fixed guide plate away from the adjusting guide plate, and the side walls of the accommodating groove along its length direction are provided with fixing grooves cooperating with the fixing sleeve.

[0023] Preferably, a pair of horizontally extending fixed edges are symmetrically arranged at both ends of the guide rod, and a pair of upwardly protruding locking seats are symmetrically arranged on both sides of the adjustment groove along its length direction. The fixed edges are correspondingly overlapped on the locking seats at corresponding positions and are locked and fixed by locking bolts.

[0024] The beneficial effects of the utility model are as follows:

[0025] The utility model simplifies the adjustment mechanism and adopts a simple mechanical structure combining a guide rod and an adjustment guide plate, thereby replacing a complex gear rack or screw system, fully reducing the number of moving parts, reducing the failure rate due to mechanical wear, corrosion or fatigue, and significantly enhancing the stability and service life of the paper width adjustment structure.

[0026] In addition, the self-locking function is introduced, and the self-locking function is achieved by adjusting the guide plate and the limit structure, that is, the adjustment guide plate can be buckled with the limit card point at multiple preset positions, so as to maintain a stable paper width setting without the need for an additional locking device. This self-locking mechanism not only simplifies the operation process, but also ensures that the adjusted paper width setting will not be offset due to slight vibration or external force, thereby improving the printing quality.

[0027] In particular, the paper width adjustment structure of the utility model adopts a modular design, such as the guide rod, the adjustment guide plate, and the fixed guide plate can be independently disassembled and assembled, which greatly simplifies the maintenance and replacement process. When a component is damaged, only the component needs to be replaced, avoiding the high cost and long downtime caused by the overall replacement of the paper bin structure, and effectively ensuring the continuous operation and work efficiency of the equipment.

[0028] In addition, by rationally arranging the connection relationship between the adjusting guide plate, the fixed guide plate and the guide rod, and the position of the limiting structure, the utility model achieves rapid, accurate and smooth paper width adjustment.

[0029] In addition, the guiding functions of the first guide surface and the second guide surface are combined to make the adjustment process more intuitive and easy to operate, and the paper width adjustment can be easily completed even in a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0031] in:

[0032] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0033] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0034] Figure 3 It is one of the partial cross-sectional structural schematic diagrams of the utility model;

[0035] Figure 4 This is the second partial cross-sectional structural schematic diagram of the utility model;

[0036] Figure 5 It is one of the three-dimensional structural schematic diagrams of the adjusting guide plate in the utility model;

[0037] Figure 6 This is the second schematic diagram of the three-dimensional structure of the adjusting guide plate in the utility model.

[0038] Description of labels:

[0039] 10. Paper bin; 11. Accommodating groove; 20. Adjusting groove; 21. Flat surface; 22. Clamping edge; 23. Supporting surface; 24. Locking seat; 25. Fixed groove; 30. Guide rod; 31. Fixed edge; 32. Locking bolt; 40. Adjusting guide plate; 41. First baffle plate; 42. First connecting part; 421. Connecting plate; 422. Adjusting plate; 43. Abutting surface; 44. Displacement groove; 45. Deformation rib; 46. Clamping part; 461. Second guide surface; 47. Sliding hole; 50. Limiting structure; 51. Limiting clamping point; 52. Limiting protrusion; 521. First guide surface; 53. Displacement gap; 60. Fixed guide plate; 61. Second connecting part; 62. Fixed sleeve; 70. Printer housing. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] See also Figures 1 to 6 , is a printer paper width adjustment structure with a self-locking function as the best embodiment of the utility model,

[0042] First, the paper bin 10 is provided inside the printer housing 70 and includes a receiving groove 11 adapted to the outer curved surface of the printing paper roll, and an adjusting groove 20 is formed on one side of the receiving groove 11 and connected therewith;

[0043] Specifically, in the present embodiment, the paper bin 10 is formed by the printer housing 70 (generally the lower cover) to form an overall cylindrical arc-shaped groove (i.e., the accommodating groove 11), a flat surface 21 extends horizontally on one side of the accommodating groove 11, and a long strip-shaped clamping edge 22 is provided on the side of the flat surface 21 close to the accommodating groove 11, and the side of the flat surface 21 away from the accommodating groove 11 extends upward to form a supporting surface 23, and the supporting surface 23, the flat surface 21 and the clamping edge 22 enclose the adjusting groove 20. In order to make the whole more suitable for the installation of the printer lower cover, the upper end of the supporting surface 23 terminates at the highest position with the arc-shaped surface of the accommodating groove 11, so that the accommodating groove 11 and the adjusting groove 20 as a whole form a groove-type design based on the sinking of the end surface of the printer housing 70, which is convenient for the subsequent installation and fixation of the printing paper roll and various components.

[0044] It also includes a guide rod 30 in the shape of an elongated round rod, both ends of which are detachably arranged in the adjustment slot 20 and are arranged parallel to the axial installation direction of the printing paper roll;

[0045] In this embodiment, in order to realize the detachable design of the guide rod 30, a pair of thin-sheet-shaped and horizontally extending fixed edges 31 are symmetrically arranged at both ends of the guide rod 30, and the two sides of the fixed edges 31 are integrally connected to the arc surface on the outer peripheral side of the guide rod 30. The adjustment groove 20 is symmetrically provided with a pair of upwardly protruding locking seats 24 on both sides along its length direction. The fixed edges 31 are correspondingly overlapped on the locking seats 24 at the corresponding positions and are locked and fixed by locking bolts 32. When the locking seats 24 are lifted, the guide rod 30 as a whole forms a certain distance from the bottom of the adjustment groove 20, so that the guide rod 30 can be used as a guide structure to be conveniently connected with other structures to achieve sliding.

[0046] It also includes an adjustment guide plate 40, which is disposed in the receiving groove 11 and one side of which is slidably connected to the guide rod 30;

[0047] In this embodiment, the adjustment guide 40 includes a first baffle 41 and a first connecting portion 42 arranged on one side of the first baffle 41. The shape of the first baffle 41 is adapted to the arc surface of the accommodating groove 11 so as to facilitate clearance fit and sliding with the accommodating groove 11, and at the same time facilitate support for the end of the printing paper roll. The first connecting portion 42 includes a connecting plate 421 and an adjusting plate 422. The adjusting plate 422 remains parallel to the first baffle 41, and the connecting plate 421 is integrally and vertically connected to the adjusting plate 422 and one side of the first baffle 41, thereby forming a staggered parallel relationship between the adjusting plate 422 and the first baffle 41.

[0048] It also includes a limiting structure 50, which is arranged in the adjustment slot 20 and includes a plurality of limiting points 51 distributed parallel to the axial direction of the guide rod 30;

[0049] In this embodiment, the limit clamping point 51 is formed by the gap between two adjacent limit protrusions 52 , and a plurality of limit protrusions 52 are distributed at equal intervals along the length direction of the adjustment slot 20 .

[0050] The portion of the adjustment guide plate 40 located in the adjustment slot 20 is constructed to be snap-fitted with one of the limit clamping points 51 to achieve position fixation and can be twisted and deformed with the adjustment guide plate 40 to escape from the snap-fit ​​state.

[0051] Specifically, in order to achieve the limiting cooperation relationship between the above-mentioned limit card point 51 and the adjustment guide plate 40, abutment surfaces 43 corresponding to the side walls of the card edge 22 and the support surface 23 are formed on both sides of the first connecting part 42, that is, the side wall of the connecting plate 421 maintains parallel contact with the card edge 22, and the side wall of the adjustment plate 422 away from the side of the connecting plate 421 maintains parallel contact with the support surface 23, thereby realizing the limiting of the first connecting part 42 by the adjustment groove 20, so that it can stably slide along the length direction of the adjustment groove 20 and under the guidance of the guide rod 30.

[0052] In addition, a clearance groove 44 adapted to the length of the limiting protrusion 52 is recessed inwardly on the bottom surface of the first connecting portion 42 and located between the two abutting surfaces 43. Thus, through the provision of the clearance groove 44, the first connecting portion 42 can stably avoid a number of limiting protrusions 52 when sliding in the adjustment groove 20, thereby preventing the limiting protrusions 52 from interfering with its normal sliding adjustment process.

[0053] In particular, a deformation rib 45 extends horizontally from the bottom of the yielding groove 44, and a buckle portion 46 adapted to the shape of the limit clamping point 51 between adjacent limit protrusions 52 is protruded from the bottom of the deformation rib 45. In this embodiment, the yielding groove 44 is formed by thickening the side of the adjustment plate 422 in contact with the support surface 23, and hollowing out the middle part between it and the connecting plate 421 to form a hollow area for the deformation rib 45 to deform, and the buckle portion 46 is integrally arranged on the bottom surface of the end of the deformation rib 45, so as to facilitate the limit cooperation between the buckle portion 46 and the limit clamping point 51.

[0054] Preferably, in this embodiment, the clamping edge 22 is parallel to the guide rod 30 , so as to achieve stable guidance of the adjustment guide plate 40 in the receiving groove 11 .

[0055] Preferably, the limiting protrusion 52 is in the shape of an elongated strip and is axially distributed perpendicular to the guide rod 30 , with clearance gaps 53 between its two ends and the two side walls of the adjustment groove 20 , so that the connecting plate 421 and the adjustment plate 422 can be respectively placed in the two clearance gaps 53 to achieve stable sliding of the first connecting part 42 .

[0056] Preferably, a sliding hole 47 which is clearance-matched with the guide rod 30 is formed through the top of the first connecting portion 42 in a direction perpendicular to the adjusting guide plate 40 , thereby facilitating the sliding connection with the guide rod 30 .

[0057] Preferably, two inclined first guide surfaces 521 are symmetrically arranged on the top of the limiting protrusion 52 and on both sides along its width direction, and second guide surfaces 461 adapted to the first guide surfaces 521 are symmetrically formed on both sides of the buckle portion 46. Combined with the guiding effect of the first guide surface 521 and the second guide surface 461, the adjustment process is more intuitive and easy to operate, and the paper width adjustment can be easily completed even in a small space.

[0058] Preferably, a fixed guide plate 60 is further included, which is adapted in shape to the adjustment guide plate 40 and one side of which is slidably connected to the guide rod 30 via a second connecting portion 61. In this embodiment, the second connecting portion 61 has the same structure as the first connecting portion 42 but lacks the deformation rib 45 and the buckle portion 46. Instead, it is replaced by a plane that is in flat contact with the bottom surface of the adjustment groove 20. Under normal use, the fixed guide plate 60 is pressed against one end of the accommodating groove 11 under the extrusion of the axial end of the printing paper roll, and according to the axial length of the other end of the printing paper roll, the adjustment guide plate 40 is bent so that the buckle portion 46 disengages from the limit card point 51. After adjusting to a suitable position, the adjustment guide plate 40 is released so that the buckle portion 46 falls back into the limit card point 51 at the corresponding position, thereby realizing the fixing of the adjustment guide plate 40 and the installation process of the printing paper roll.

[0059] In addition, in this embodiment, the offset setting of the adjustment plate 422 and the connecting plate 421 is intended to form a concession for the locking seat 24, and the adjustment plates 422 of the fixed guide plate 60 and the adjustment guide plate 40 are set toward the side close to each other, thereby forming a symmetrical concession structure.

[0060] Preferably, the side of the fixed guide plate 60 and the adjustment guide plate 40 that are close to each other is a smooth plane, and a fixing sleeve 62 is horizontally protruded outward on the side of the fixed guide plate 60 away from the adjustment guide plate 40, and the side walls of the accommodating groove 11 along its length direction are provided with fixing grooves 25 that cooperate with the fixing sleeve 62.

[0061] In particular, in this embodiment, a plurality of limiting protrusions 52 are formed in a strip shape and extend along a side of the adjustment slot 20 away from the fixed guide plate 60 to a position close to the middle of the adjustment slot 20, thereby realizing the adjustment of the adjustment guide plate 40 within the above-mentioned range, which is suitable for the clamping work of most printing paper rolls on the market.

[0062] The working process and beneficial effects of the utility model are as follows:

[0063] First, when the user needs to adjust the width of the printing paper, the user manually bends the adjustment guide 40 so that the buckle portion 46 is disengaged from the limit point 51. At this time, the adjustment guide 40 can slide along the guide rod 30, and the first connecting portion 42 on one side thereof moves in the area of ​​the continuously distributed limit points 51. At this time, the buckle portion 46 on the adjustment guide 40 and the limit points 51 in the limit structure 50 are in an unfastened state, allowing the adjustment guide 40 to slide freely; when the adjustment guide 40 moves to the target position, the adjustment guide 40 is released, and the buckle portion 46 automatically buckles with the corresponding limit point 51 to achieve position fixation. This process benefits from the elastic deformation of the deformation rib 45, so that the buckle portion 46 can be smoothly embedded in the limit point 51 to form a self-locking state, and the stable position of the adjustment guide 40 can be maintained without additional locking operations. If it is necessary to fine-tune or unlock the adjustment guide 40 , the user only needs to apply a certain torque to slightly twist the adjustment guide 40 , so that the deformation rib 45 deforms accordingly, and the buckle portion 46 disengages from the limit point 51 , thereby restoring the freedom of movement of the adjustment guide 40 .

[0064] The utility model simplifies the adjustment mechanism and adopts a simple mechanical structure combining a guide rod 30 and an adjustment guide plate 40, thereby replacing a complex gear rack or screw system, fully reducing the number of moving parts, reducing the failure rate due to mechanical wear, corrosion or fatigue, and significantly enhancing the stability and service life of the paper width adjustment structure.

[0065] In addition, a self-locking function is introduced, and the self-locking function is realized by the cooperation between the adjustment guide plate 40 and the limit structure 50, that is, the adjustment guide plate 40 can be snap-fitted with the limit card point 51 at multiple preset positions, thereby maintaining a stable paper width setting without the need for an additional locking device. This self-locking mechanism not only simplifies the operation process, but also ensures that the adjusted paper width setting will not be offset due to slight vibration or external force, thereby improving the printing quality.

[0066] In particular, the paper width adjustment structure of the present invention adopts a modular design, such as the guide rod 30, the adjustment guide plate 40, and the fixed guide plate 60 can be independently disassembled and assembled, which greatly simplifies the maintenance and replacement process. When a component is damaged, only the component needs to be replaced, avoiding the high cost and long downtime caused by the overall replacement of the paper bin 10 structure, and effectively ensuring the continuous operation and work efficiency of the equipment.

[0067] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A printer paper width adjustment structure with a self-locking function, characterized in that: include: A paper bin (10) is arranged in a printer housing (70), and comprises a receiving groove (11) adapted to the outer curved surface of the printing paper roll, and an adjusting groove (20) is formed on one side of the receiving groove (11) and is in communication with the receiving groove; A guide rod (30) whose two ends are detachably arranged in the adjustment groove (20) and is arranged parallel to the axial installation direction of the printing paper roll; An adjusting guide plate (40) is disposed in the accommodating groove (11) and one side of the adjusting guide plate is slidably connected to the guide rod (30); A limiting structure (50) is arranged in the adjusting groove (20), and comprises a plurality of limiting clamping points (51) distributed in parallel along the axial direction of the guide rod (30); The portion of the adjustment guide plate (40) located in the adjustment slot (20) is constructed to be capable of engaging with one of the limit clamping points (51) to achieve position fixation and can be twisted and deformed along with the adjustment guide plate (40) to escape from the locking state.

2. A printer paper width adjustment structure with a self-locking function according to claim 1, characterized in that: A flat surface (21) extends horizontally from one side of the accommodating groove (11); a long strip-shaped clamping edge (22) parallel to the guide rod (30) is provided on the side of the flat surface (21) close to the accommodating groove (11); a support surface (23) is extended upward from the side of the flat surface (21) away from the accommodating groove (11); and the support surface (23), the flat surface (21) and the clamping edge (22) are enclosed to form the adjusting groove (20).

3. A printer paper width adjustment structure with a self-locking function according to claim 2, characterized in that: The limit clamping point (51) is formed by the gap between two adjacent limit protrusions (52), and a plurality of the limit protrusions (52) are distributed at equal intervals along the length direction of the adjustment slot (20).

4. A printer paper width adjustment structure with a self-locking function according to claim 3, characterized in that: The limiting protrusion (52) is in the shape of an elongated strip and is distributed perpendicularly to the axial direction of the guide rod (30), and a clearance gap (53) is provided between the two ends of the limiting protrusion and the two side walls of the adjusting groove (20).

5. A printer paper width adjustment structure with a self-locking function according to claim 4, characterized in that: A first connecting portion (42) is provided on one side of the adjusting guide plate (40), and abutment surfaces (43) corresponding to the side walls of the clamping edge (22) and the supporting surface (23) are formed on both sides of the first connecting portion (42), respectively; a clearance groove (44) adapted to the length of the limiting protrusion (52) is provided inwardly on the bottom surface of the first connecting portion (42) and between the two abutment surfaces (43); a deformation rib (45) extends horizontally from the bottom of the clearance groove (44); and a buckle portion (46) adapted to the shape of the limiting clamping point (51) between adjacent limiting protrusions (52) is provided protrudingly on the bottom of the deformation rib (45).

6. A printer paper width adjustment structure with a self-locking function according to claim 5, characterized in that: A sliding hole (47) which is clearance-matched with the guide rod (30) is formed through the top of the first connecting portion (42) in a direction perpendicular to the adjusting guide plate (40).

7. A printer paper width adjustment structure with a self-locking function according to claim 5, characterized in that: Two inclined first guide surfaces (521) are symmetrically arranged on the top of the limiting protrusion (52) and on both sides along the width direction thereof, and second guide surfaces (461) adapted to the first guide surfaces (521) are symmetrically formed on both sides of the buckle portion (46).

8. A printer paper width adjustment structure with a self-locking function according to claim 1, characterized in that: It also comprises a fixed guide plate (60), the fixed guide plate (60) is adapted in shape to the adjustment guide plate (40) and one side of the fixed guide plate (60) is slidably connected to the guide rod (30) via a second connection portion (61).

9. A printer paper width adjustment structure with a self-locking function according to claim 8, characterized in that: The surfaces of the fixed guide plate (60) and the adjusting guide plate (40) that are close to each other are smooth planes, and a fixing sleeve (62) is horizontally protruded outwardly on a surface of the fixed guide plate (60) that is away from the adjusting guide plate (40), and the accommodating groove (11) is provided with fixing grooves (25) that cooperate with the fixing sleeve (62) on both side walls along the length direction thereof.

10. A printer paper width adjustment structure with a self-locking function according to claim 1, characterized in that: A pair of horizontally extending fixed edges (31) are symmetrically arranged at both ends of the guide rod (30), and a pair of upwardly protruding locking seats (24) are symmetrically arranged on both sides of the adjustment slot (20) along its length direction. The fixed edges (31) are correspondingly overlapped on the locking seats (24) at corresponding positions and are locked and fixed by locking bolts (32).

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