A pencil sharpener with self-adapting pencil holder

Abstract

The application discloses a pencil sharpener with self-adaptive pencil clamping function, which comprises a mounting bracket, at least two pencil clamping assemblies are mounted in the mounting bracket, a pencil clamping opening is formed between the at least two pencil clamping assemblies, the pencil clamping assembly is provided with a roller shaft and a roller, the roller shaft is mounted on the mounting bracket, the roller is provided with a recess for clamping a pencil, the roller is sleeved on the roller shaft, the roller can rotate in a circumferential direction on the roller shaft, the roller can slide in an axial direction on the roller shaft, the size of the pencil clamping opening can be adjusted, an elastic element is arranged between the mounting bracket and the roller, the elastic element is used for keeping the clamping force of the pencil clamping opening, the size of the pencil clamping opening is adjusted through the axial sliding of the roller on the roller shaft, the self-adaptive pencil clamping function is realized, a user does not need to continuously pinch a pencil during pencil sharpening, the fatigue feeling of hands is reduced, and the pencil sharpening is more labor-saving.

Description

Technical Field

[0001] This application relates to the field of stationery technology, and more specifically to an adaptive pen-sharpening device. Background Technology

[0002] Pencil sharpeners, as an indispensable stationery item in fields such as learning, office work, and drawing, have the core function of precisely cutting pencils through a sharpening mechanism to expose the lead and form a sharp tip, thus meeting writing needs. The pencil clamping mechanism is a crucial component of the pencil sharpener. Its main function is to hold the pencil in place during the sharpening process. When the pencil passes through the clamping mechanism into the sharpening mechanism, it is held firmly to prevent the pencil from spinning freely while rotating with the blade holder, ensuring accuracy and stability. The sharpening mechanism then cuts the pencil manually or automatically. After the pencil is sharpened, the clamping mechanism releases the pencil, allowing it to be removed. For example, Chinese utility model patent CN219667830U discloses a pencil-clamping mechanism for a pencil sharpener, including a mounting base, sliders, and an elastic element. Two sliders are located on the upper part of the mounting base and can move towards and away from each other. A clamping opening for a pencil to pass through is provided between the two sliders at their closest ends. The elastic element provides elastic force for the two sliders to move in opposite directions. The pencil-clamping mechanism also includes an adjusting plate that can be rotatably disposed relative to the mounting base. This adjusting plate is linked to the two sliders so that the two sliders can move towards and away from each other synchronously. In this technical solution, the two sliders are located on the upper part of the mounting base and can move towards and away from each other. The clamping opening for a pencil to pass through is provided between their closest ends. Although this design can clamp the pencil by moving the sliders, the size of the clamping opening is fixed and cannot be adjusted according to the pencil diameter. This results in only being able to clamp pencils of a specific diameter, which greatly limits the applicability and ease of use of the pencil sharpener. Summary of the Invention

[0003] The technical problem this application aims to solve is to provide an adaptive pencil sharpener that adjusts the size of the clamping opening by axially sliding a roller on a roller shaft, thereby achieving an adaptive pencil clamping function. Users do not need to continuously squeeze the pencil during the sharpening process, reducing hand fatigue and making it more effortless to use.

[0004] This application provides an adaptive pen-clamping sharpener, including a mounting bracket. At least two pen-clamping assemblies are mounted within the mounting bracket, forming a pen-clamping opening between the at least two pen-clamping assemblies. Each pen-clamping assembly has a roller and a wheel. The roller is mounted on the mounting bracket, and the wheel has a recess for clamping the pen. The wheel is fitted onto the roller, and the wheel can rotate circumferentially on the roller and slide axially on the roller to adjust the size of the pen-clamping opening. An elastic element is provided between the mounting bracket and the wheel to maintain the clamping force of the pen-clamping opening.

[0005] In this technical solution, each pen-clamping assembly includes a roller and a roller rotatably mounted on the roller. The roller can rotate freely when clamping the pen, reducing friction and improving the smoothness of pen feeding, retraction, and sharpening. The roller is designed to slide axially on the roller. The size of the clamping opening can automatically adjust according to the diameter of the inserted pen, thus accommodating pens of different diameters and improving the versatility and flexibility of the pencil sharpener. The elastic force of the elastic element can be dynamically adjusted according to the sliding position of the roller, ensuring that appropriate clamping force is provided for different pen diameters, thereby improving the stability and reliability of clamping. When the pencil passes through the clamping opening, the feeding force can... The rollers slide axially, widening the clamping opening to allow the pencil to be inserted. Once the sharpening process begins, the pencil rotates under the action of the blade, causing the rollers to move axially and narrowing the clamping opening between the rollers. This clamps the pencil tightly, preventing it from spinning. The size of the clamping opening is adjusted by the axial sliding of the rollers on the shaft. It can automatically adjust the size of the clamping opening according to the diameter of the inserted pencil, thus adapting to different pencil diameters and achieving an adaptive clamping function. Users do not need to continuously squeeze the pencil during sharpening, reducing hand fatigue, making it easier to use, and improving the user experience.

[0006] As an improvement, the roller is provided with opposing first and second conical sections, which engage to form a recess. In this technical solution, the recess is formed by the engagement of the first and second conical sections and is used to clamp the pencil, providing a stable clamping position. The design of the conical sections can adapt to pencils of different shapes, allowing the recess to fit closely to the pencil surface, thereby achieving adaptive clamping. This creates surface-to-surface contact between the roller and the pencil, providing a more stable clamping force and reducing pencil wobbling during sharpening.

[0007] As an improvement, the diameter of the first conical segment is larger than the diameter of the second conical segment. In this technical solution, the design of first and second conical segments with different diameters creates a progressive clamping space in the recessed area, better accommodating pencils of different diameters and further enhancing adjustability. The larger diameter of the first conical segment results in a smaller clamping opening, suitable for holding smaller diameter pencils, while the smaller diameter of the second conical segment results in a wider range of clamping opening sizes, suitable for holding larger diameter pencils. No manual adjustment by the user is required, making it more convenient and effortless to use.

[0008] As an improvement, the first conical section is located on the side of the roller closer to the elastic element, and the second conical section is located on the side of the roller farther from the elastic element. In this technical solution, the first conical section, located on the side of the roller closer to the elastic element, has a larger diameter, resulting in a smaller pen-clamping opening. This provides a narrower but more stable clamping position, ensuring that the pencil can be quickly positioned and clamped when inserted, suitable for clamping pencils with smaller diameters. The second conical section, located on the side of the roller farther from the elastic element, has a smaller diameter, resulting in a larger range of pen-clamping opening sizes, suitable for clamping pencils with larger diameters. This provides a wider adjustment range, ensuring clamping stability and adaptability. The elastic element abuts against the side of the first conical section with a larger diameter, which better disperses the elastic force of the elastic element, ensuring that the clamping force is evenly distributed around the pencil, thereby improving clamping stability and reducing the force required by the user when inserting the pencil, thus achieving a labor-saving effect.

[0009] As an improvement, the elastic element is fitted onto the roller, and a first limiting seat is provided on the side of the roller away from the elastic element. The first limiting seat abuts against the roller to limit the sliding range of the roller. In this technical solution, the elastic element fitted onto the roller provides stable support for the roller, ensuring the stability of the roller during axial sliding. The first limiting seat abuts against the roller, limiting the sliding range of the roller and ensuring that the roller does not move excessively during axial sliding, thereby ensuring a uniform distribution of clamping force. The first limiting seat is located on the side of the roller away from the elastic element, so that the roller can only squeeze the elastic element to achieve displacement when subjected to force. This allows the user to apply only a light force when inserting the pencil, and the elastic force of the elastic element can provide sufficient initial clamping force, reducing the force required by the user. As the pencil is further inserted, the roller gradually tightens the clamping jaws under the action of the elastic element. This progressive clamping mechanism further reduces the force required by the user during clamping.

[0010] As an improvement, the mounting bracket is provided with a first mounting hole and a second mounting hole adapted to the roller. One end of the roller is rotatably mounted in the first mounting hole, and the other end of the roller is rotatably mounted in the second mounting hole. In this technical solution, both ends of the roller can be installed in the two mounting holes respectively. The size and shape of the mounting holes are adapted to the roller, ensuring that the roller can be tightly installed in the mounting holes, while allowing the roller to rotate freely in the mounting holes, ensuring the stability and rotational flexibility of the roller.

[0011] As an improvement, the first mounting hole is a through-hole structure, and the second mounting hole is a U-shaped hole structure. The end of the roller furthest from the elastic element is rotatably mounted in the second mounting hole. In this technical solution, the through-hole structure allows one end of the roller to rotate freely within the mounting bracket while providing stable support, ensuring the roller's rotational flexibility and stability. One end of the roller is mounted in the first mounting hole through the through-hole structure. This design ensures that one end of the roller can be stably fixed to the mounting bracket while allowing the roller to rotate freely within the mounting hole. The other end of the roller is mounted in the second mounting hole through the U-shaped hole structure. This allows the roller to be easily mounted on the mounting bracket or disassembled and maintained when needed, simplifying installation.

[0012] As an improvement, the device includes a housing and a cover, with the mounting bracket located between the housing and the cover, and the mounting bracket snap-fitted to the cover. In this technical solution, the housing is the main structure of the pencil sharpener, used to house and protect internal mechanical components such as the blade and the pencil feeding mechanism. The cover is the upper structure of the housing, used to cover and protect the internal components, and also to allow the pencil to be inserted into the housing. The mounting bracket is located between the housing and the cover, used to stably mount the pencil clamping assembly. The mounting bracket is fixed to the cover by a snap-fit ​​connection. The cover has a snap-fit ​​structure, and the mounting bracket has a corresponding slot. The mounting bracket is fixed to the cover by the cooperation of the snap-fit ​​and the slot, achieving quick and reliable assembly and reducing assembly time and labor intensity.

[0013] As an improvement, the cover is provided with a limiting structure adapted to the second mounting hole. This limiting structure is used to confine the end of the roller away from the elastic element within the second mounting hole. In this technical solution, the limiting structure ensures stable rotation of the roller end within the second mounting hole, while preventing loosening or displacement of the roller during use. The second mounting hole is a U-shaped hole structure. When the cover is connected to the mounting bracket, the limiting structure can be inserted into the second mounting hole, thereby cooperating with the second mounting hole to clamp the end of the roller away from the elastic element, improving installation efficiency and reliability.

[0014] As an improvement, the pencil clamping assembly includes a first pencil clamping assembly and a second pencil clamping assembly, which are distributed on opposite sides and in opposite directions on the mounting bracket. In this technical solution, the first and second pencil clamping assemblies are located on both sides of the mounting bracket, clamping the pencil from two directions to provide a more stable clamping effect. The opposite distribution of the two pencil clamping assemblies ensures that the pencil is subjected to uniform force during clamping, further improving the stability and reliability of the clamping. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an adaptive pen-clamping sharpener according to this application.

[0016] Figure 2 This is an exploded structural diagram of an adaptive pen-clamping sharpener according to this application.

[0017] Figure 3 This is an exploded structural diagram of the mounting bracket and pen clamp assembly in this application.

[0018] Figure 4 This is a three-dimensional structural diagram of the pen clip assembly in this application.

[0019] Figure 5 This is a three-dimensional structural diagram of the cover body in this application.

[0020] The figure shows: 1. Mounting bracket; 11. First mounting hole; 12. Second mounting hole; 13. Slot; 2. Pen clamping assembly; 21. Roller; 211. First limiting seat; 22. Roller; 221. Recess; 222. First tapered section; 223. Second tapered section; 23. Elastic element; 3. Pen clamping opening; 4. Housing; 5. Cover; 51. Limiting structure; 52. Buckling structure; 6. Cutting tool. Detailed Implementation

[0021] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0022] In the accompanying drawings, the thickness, size, and shape of the objects have been slightly exaggerated for illustrative purposes. The drawings are for illustrative purposes only and are not drawn to scale.

[0023] It should also be understood that the terms "comprising," "including," "having," "containing," and "including," when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. The terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (the specific types and constructions may be the same or different), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0024] Furthermore, it should be noted that the terms "installation," "setting," "equipped with," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components; they can refer to a direct installation on another component or the possible presence of another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only. Unless otherwise defined, 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 invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] like Figures 1 to 5As shown, this application discloses an adaptive pen-clamping sharpener, including a mounting bracket 1. At least two pen-clamping assemblies 2 are mounted within the mounting bracket 1, forming a pen-clamping opening 3 between the at least two pen-clamping assemblies 2. Each pen-clamping assembly 2 is provided with a roller 21 and a roller 22. The roller 21 is mounted on the mounting bracket 1, and the roller 22 has a recess 221 for clamping the pen. The roller 22 is fitted onto the roller 21, and the roller 22 can rotate circumferentially on the roller 21 and slide axially on the roller 21. The size of the pen clamping opening 3 is adjusted by moving the pen clamping mechanism 2. An elastic element 23 is provided between the mounting bracket 1 and the roller 22. The elastic element 23 is used to maintain the clamping force of the pen clamping opening 3. Each pen clamping assembly 2 includes a roller 21 and a roller 22 rotatably mounted on the roller 21. The roller 22 can rotate freely when clamping the pen, reducing friction and improving the smoothness of pen feeding, retraction, and sharpening. The roller 22 is designed to slide axially on the roller 21. The size of the pen clamping opening 3 can be automatically adjusted according to the diameter of the inserted pen. The elastic force of the elastic element 23 can be dynamically adjusted according to the sliding position of the roller 22 to ensure that a suitable clamping force can be provided for different pencil diameters, thereby improving the stability and reliability of clamping. When the pencil passes through the clamping opening 3, the force of the pencil entry can make the roller 22 slide axially, expanding the size of the clamping opening 3, so that the pencil can be inserted. After the pencil sharpening work begins, the pencil begins to rotate under the action of the cutter 6, thereby driving the roller 22 to move axially, reducing the size of the clamping opening 3 formed between the rollers 22, thereby clamping the pencil and preventing the pencil from spinning. The size of the clamping opening 3 can be adjusted by the axial sliding of the roller 22 on the roller 21, so that the size of the clamping opening 3 can be automatically adjusted according to the diameter of the inserted pencil, thereby adapting to pencils of different diameters and realizing the adaptive clamping function. Users do not need to continuously squeeze the pencil during the sharpening process, reducing hand fatigue, making it easier to use and improving the user experience.

[0026] More specifically, such as Figure 3 and Figure 4 As shown, the roller 22 has a first conical section 222 and a second conical section 223 that are opposite to each other. The first conical section 222 and the second conical section 223 are joined to form a recess 221. The recess 221 is formed by the joining of the first conical section 222 and the second conical section 223 and is used to hold the pencil, providing a stable holding position for the pencil. The design of the conical section can adapt to pencils of different shapes, so that the recess 221 can fit closely to the pencil surface, thereby achieving adaptive clamping. This allows the roller 22 to form a surface-to-surface contact with the pencil, providing a more stable clamping force and reducing the shaking of the pencil during the sharpening process.

[0027] More specifically, such as Figure 3 and Figure 4As shown, the diameter of the first conical segment 222 is larger than the diameter of the second conical segment 223. The design of the first conical segment 222 and the second conical segment 223 with different diameters makes the recessed part 221 form a progressive clamping space, which better accommodates pencils of different diameters and further enhances adjustability. The first conical segment 222 has a larger diameter, and the resulting pen clamping opening 3 is smaller, which can accommodate pencils with smaller diameters. The second conical segment 223 has a smaller diameter, and the resulting pen clamping opening 3 has a larger range of sizes, which can accommodate pencils with larger diameters. No manual adjustment is required by the user, making it more convenient and effortless to use.

[0028] More specifically, such as Figure 3 and Figure 4 As shown, the first tapered segment 222 is located on the side of the roller 22 closer to the elastic member 23, and the second tapered segment 223 is located on the side of the roller 22 away from the elastic member 23. The first tapered segment 222, located on the side of the roller 22 closer to the elastic member 23, has a larger diameter, forming a smaller pen-clamping opening 3, providing a narrower but stable clamping position, ensuring that the pencil can be quickly positioned and clamped when inserted, suitable for clamping pencils with smaller diameters. The second tapered segment 223, located on the side of the roller 22 away from the elastic member 23, has a smaller diameter, forming a larger pen-clamping opening 3, suitable for clamping pencils with larger diameters, providing a wider adjustment range, ensuring clamping stability and adaptability. The elastic member 23 abuts against the side of the first tapered segment 222 with a larger diameter, which can better disperse the elastic force of the elastic member 23, ensuring that the clamping force is evenly distributed around the pencil, thereby improving clamping stability and reducing the force that the user needs to apply when inserting the pencil, thus achieving a labor-saving effect.

[0029] More specifically, such as Figure 3 and Figure 4 As shown, the elastic element 23 is fitted onto the roller 21. A first limiting seat 211 is provided on the side of the roller 21 away from the elastic element 23. The first limiting seat 211 abuts against the roller 22 to limit the sliding range of the roller 22. The elastic element 23, fitted onto the roller 21, provides stable support for the roller 22, ensuring the stability of the roller 22 during axial sliding. The first limiting seat 211 abuts against the roller 22, limiting the sliding range of the roller 22 and ensuring that the roller 22 does not move excessively during axial sliding. To ensure a uniform distribution of clamping force, the first limiting seat 211 is located on the side of the roller 21 away from the elastic element 23. When the roller 22 is subjected to force, it can only squeeze the elastic element 23 to achieve displacement. This allows the user to apply only a light force when inserting the pencil, and the elastic force of the elastic element 23 can provide sufficient initial clamping force, reducing the force that the user needs to apply. As the pencil is further inserted, the roller 22 gradually tightens the clamping mouth 3 under the action of the elastic element 23. The progressive clamping mechanism can further reduce the force that the user needs to apply during the clamping process.

[0030] More specifically, such as Figure 3 and Figure 4 As shown, the mounting bracket 1 is provided with a first mounting hole 11 and a second mounting hole 12 that are adapted to the roller 21. One end of the roller 21 is rotatably installed in the first mounting hole 11, and the other end of the roller 21 is rotatably installed in the second mounting hole 12. Both ends of the roller 21 can be installed in the two mounting holes respectively. The size and shape of the mounting holes are adapted to the roller 21 to ensure that the roller 21 can be tightly installed in the mounting holes, while allowing the roller 21 to rotate freely in the mounting holes, ensuring the stability and rotational flexibility of the roller 21.

[0031] More specifically, such as Figure 3 As shown, the first mounting hole 11 is a through hole structure, and the second mounting hole 12 is a U-shaped hole structure. The end of the roller 21 away from the elastic element 23 is rotatably mounted in the second mounting hole 12. The through hole structure allows one end of the roller 21 to rotate freely in the mounting bracket 1, while providing stable support to ensure the rotational flexibility and stability of the roller 21. One end of the roller 21 is mounted in the first mounting hole 11 through the through hole structure. This design ensures that one end of the roller 21 can be stably fixed on the mounting bracket 1, while allowing the roller 21 to rotate freely in the mounting hole. The other end of the roller 21 is mounted in the second mounting hole 12 through the U-shaped hole structure. The roller 21 can be easily mounted on the mounting bracket 1, or disassembled and maintained when needed, making installation simpler.

[0032] More specifically, such as Figure 1 and Figure 2 As shown, the pencil sharpener includes a housing 4 and a cover 5. A mounting bracket 1 is located between the housing 4 and the cover 5. The mounting bracket 1 is snapped together with the cover 5. The housing 4 is the main structure of the pencil sharpener, used to house and protect the internal mechanical parts, such as the blade 6 and the pencil feeding mechanism. The cover 5 is the upper structure of the housing 4, used to cover and protect the internal parts, and to allow the pencil to be inserted into the housing 4. The mounting bracket 1 is located between the housing 4 and the cover 5, used to stably install the pencil clamping assembly 2. The mounting bracket 1 and the cover 5 are fixed by snapping together. The cover 5 is provided with a snap-fit ​​structure 52, and the mounting bracket 1 is provided with a corresponding slot 13. The mounting bracket 1 is fixed to the cover 5 by the cooperation of the snap and the slot 13, realizing quick and reliable assembly and reducing assembly time and labor intensity.

[0033] More specifically, such as Figure 5As shown, the cover 5 is provided with a limiting structure 51 adapted to the second mounting hole 12. The limiting structure 51 is used to limit the end of the roller 21 away from the elastic member 23 within the second mounting hole 12. The function of the limiting structure 51 is to ensure that the end of the roller 21 rotates stably within the second mounting hole 12, and at the same time prevent the roller 21 from loosening or shifting during use. The second mounting hole 12 is a U-shaped hole structure. When the cover 5 is connected to the mounting bracket 1, the limiting structure 51 can be inserted into the second mounting hole 12, thereby cooperating with the second mounting hole 12 to clamp the end of the roller 21 away from the elastic member 23, improving installation efficiency and reliability of use.

[0034] More specifically, such as Figure 3 As shown, the pencil clamping assembly 2 includes a first pencil clamping assembly 2 and a second pencil clamping assembly 2. The first pencil clamping assembly 2 and the second pencil clamping assembly 2 have the same structure. The first pencil clamping assembly 2 and the second pencil clamping assembly 2 are distributed on opposite sides and in opposite directions on the mounting bracket 1. The first pencil clamping assembly 2 and the second pencil clamping assembly 2 are located on both sides of the mounting bracket 1, clamping the pencil from two directions to provide a more stable clamping effect. The two pencil clamping assemblies 2 are distributed in opposite directions to ensure that the pencil is subjected to uniform force during the clamping process, further improving the stability and reliability of the clamping.

[0035] This application is not limited to the above-described preferred embodiments. Anyone can derive other products in various forms under the guidance of this application. However, regardless of any changes made to their shape or structure, any technical solution that is the same as or similar to that of this application falls within the protection scope of this application.

Claims

1. An adaptive pen-clamping sharpener, comprising a mounting bracket (1), wherein at least two pen-clamping components (2) are mounted within the mounting bracket (1), and a pen-clamping opening (3) is formed between the at least two pen-clamping components (2), characterized in that, The pen clamping assembly (2) is provided with a roller (21) and a roller (22). The roller (21) is mounted on the mounting bracket (1). The roller (22) is provided with a recess (221) for clamping the pen. The roller (22) is fitted onto the roller (21). The roller (22) can rotate circumferentially on the roller (21) and can slide axially on the roller (21) to adjust the size of the pen clamping opening (3). An elastic element (23) is provided between the mounting bracket (1) and the roller (22). The elastic element (23) is used to keep the roller (22) clamping the pen clamping opening (3) with clamping force.

2. The adaptive pen-sharpening machine according to claim 1, characterized in that, The roller (22) is provided with a first conical section (222) and a second conical section (223) that are opposite each other, and the first conical section (222) and the second conical section (223) are joined to form a recess (221).

3. The adaptive pen-clamping sharpener according to claim 2, characterized in that, The diameter of the first conical segment (222) is greater than the diameter of the second conical segment (223).

4. The adaptive pen-sharpening machine according to claim 3, characterized in that, The first tapered section (222) is located on the side of the roller (22) closer to the elastic member (23), and the second tapered section (223) is located on the side of the roller (22) away from the elastic member (23).

5. The adaptive pen-sharpening device according to claim 1, characterized in that, The elastic element (23) is fitted onto the roller (21). The roller (21) is provided with a first limiting seat (211) on the side away from the elastic element (23). The first limiting seat (211) abuts against the roller (22) to limit the sliding range of the roller (22).

6. The adaptive pen-sharpening device according to claim 5, characterized in that, The mounting bracket (1) is provided with a first mounting hole (11) and a second mounting hole (12) adapted to the roller (21). One end of the roller (21) is rotatably installed in the first mounting hole (11), and the other end of the roller (21) is rotatably installed in the second mounting hole (12).

7. The adaptive pen-sharpening machine according to claim 6, characterized in that, The first mounting hole (11) is a through hole structure, and the second mounting hole (12) is a U-shaped hole structure. The end of the roller (21) away from the elastic element (23) is rotatably mounted in the second mounting hole (12).

8. The adaptive pen-sharpening machine according to claim 7, characterized in that, Includes a housing (4) and a cover (5), wherein the mounting bracket (1) is located between the housing (4) and the cover (5), and the mounting bracket (1) is snapped together with the cover (5).

9. A self-adaptive pen-sharpening device according to claim 8, characterized in that, The cover (5) is provided with a limiting structure (51) adapted to the second mounting hole (12), the limiting structure (51) being used to limit the end of the roller (21) away from the elastic member (23) within the second mounting hole (12).

10. A self-adaptive pen-clamping sharpener according to claim 1, characterized in that, The pen clamping assembly (2) includes a first pen clamping assembly (2) and a second pen clamping assembly (2), which are distributed on opposite sides and in opposite directions on the mounting bracket (1).

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