A sharpener which can prompt sharpening

Abstract

The application discloses a pencil sharpener capable of prompting sharpening, which comprises a shell, a cutter holder assembly installed in the shell, a cover assembly and a locking structure. The cover assembly is rotationally connected with the shell, and the locking structure is used for rotationally locking or unlocking the cover assembly. A first elastic member is arranged between the cover assembly and the shell. The locking structure is movably installed in the shell and connected with the cutter holder assembly. When a pencil is sharpened in the cutter holder assembly, the pencil tip pushes the locking structure to move from a locking position to an unlocking position, so that the locking structure is unlocked with the cover assembly. The cover assembly is rotated relative to the shell under the action of the first elastic member, so as to prompt the completion of the sharpening. Through the rotating action of the cover assembly, a user can intuitively know that the pencil has been sharpened, and it is not necessary to observe the sharpening process all the time, so that the convenience and efficiency of use are improved.

Description

Technical Field

[0001] This application relates to the field of stationery technology, and more specifically to a pencil sharpener with a prompt for sharpening. Background Technology

[0002] A pencil sharpener is a common stationery item widely used in schools, offices, art studios, and other places to sharpen pencils for writing or drawing. A pencil sharpener typically consists of a housing and a blade assembly. By rotating the pencil relative to the blade assembly, the outer wood layer of the pencil is shaved off to expose the lead inside, thus completing the sharpening process. Traditional pencil sharpeners do not allow for easy confirmation of sharpening completion, leading to blind sharpening and continuous sharpening. This not only wastes pencils but also easily breaks the lead. Furthermore, frequently pulling out the pencil to check for sharpening is cumbersome and increases the time and effort required for sharpening. To address the aforementioned issues, Chinese utility model patent CN212289325U discloses a pencil sharpener mechanism with a replaceable roller cutter and visible sharpening. The mechanism includes a blade holder, a replaceable roller cutter assembly located under the blade holder, a pencil inlet located at the left end of the blade holder, an internal gear ring located at the right end of the blade holder, a crank handle located on the right side of the internal gear ring, and a pointer-visible component located on the right side of the crank handle's turntable, as well as inside the blade holder, internal gear ring, and turntable. In this technical solution, the length of the pencil tip is displayed through multiple scale steps in the viewing window, with each scale step representing one unit length of the pencil tip. As the pencil is sharpened, the pointer... By observing the position of the pointer in the viewing window, users can judge the length of the pencil tip. Although this solves the problem of traditional pencil sharpeners not being able to tell whether the sharpening is complete, users need to pay close attention to the position of the pointer in the viewing window during the sharpening process in order to stop sharpening in time. This pointer indication method requires a high level of user attention and is easy to miss the best time to stop due to distraction, resulting in the pencil lead breaking. For some users with poor eyesight or who are not familiar with the scale, it may be difficult to accurately judge the length of the pencil tip by simply observing the position of the pointer, which may easily lead to misjudgment. There are still many problems in actual use. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide a pencil sharpener that can indicate when the pencil has been sharpened. Through the rotation of the cover assembly, the user can intuitively know that the pencil has been sharpened without having to constantly observe the sharpening process, thus improving the convenience and efficiency of use.

[0004] This application provides a pencil sharpener with a sharpening indicator, including a housing and a blade holder assembly installed within the housing, a cover assembly, and a locking structure. The cover assembly is rotatably connected to the housing, and the locking structure is used to lock or unlock the cover assembly by rotation. A first elastic element is provided between the cover assembly and the housing. The locking structure is movably installed within the housing and connected to the blade holder assembly. When the pencil is sharpened within the blade holder assembly, the pencil tip pushes the locking structure from the locked position to the unlocked position, thereby unlocking the locking structure from the cover assembly. The cover assembly rotates relative to the housing under the action of the first elastic element to indicate that sharpening is complete.

[0005] In this technical solution, the housing houses the blade holder assembly, the cover assembly, and the locking structure, providing stable support and protection for each component. The blade holder assembly is used to fix and sharpen the pencil. The cover assembly is rotatably connected to the housing and covers and protects the internal structure of the pencil sharpener. A movable locking structure is added inside the housing, which can move between a locked position and an unlocked position. This locking structure is mainly used to rotate and lock or unlock the cover assembly. The locking structure is connected to the blade holder assembly. Initially, the locking structure is in the locked position, fixing the cover assembly to the housing. The pencil is inserted into the blade holder assembly. As the pencil sharpener rotates, the pencil is gradually sharpened. When the pencil is sharpened within the pencil holder assembly, the pencil tip pushes the locking structure via the pencil holder assembly, causing the locking structure to move from the locked position to the unlocked position, releasing the lock on the cover assembly. The cover assembly can then rotate relative to the housing due to the force of the first elastic element, thus indicating that sharpening is complete. Through the rotation of the cover assembly, the user can intuitively know that the pencil has been sharpened without constantly observing the sharpening process, improving convenience and efficiency, reducing the risk of misjudgment, and enhancing the user experience. The sharpening indication function is achieved using a simple mechanical structure, which is compact, highly reliable, and easy to manufacture and maintain.

[0006] As an improvement, the locking structure is slidably installed within the housing, and can slide relative to the cover assembly between a locked position and an unlocked position. A second elastic element is provided between the locking structure and the housing, which is used to keep the locking structure in the locked position. In this technical solution, the locking structure is slidably installed within the housing to achieve sliding between the locked and unlocked positions. The cover assembly is locked and unlocked by sliding. When the pencil is sharpened, the pencil tip pushes the locking structure to slide to the unlocked position. The unlocking process is quick and reliable, ensuring that the cover assembly can respond in a timely manner and indicate that the sharpening is complete. By adding a second elastic element, the locking structure is kept in the locked position, ensuring that the cover assembly is firmly locked under normal conditions and will not loosen during pencil sharpening. This improves the reliability of the sharpening indicator and the stability of the pencil sharpener, and ensures the accuracy of the unlocking action.

[0007] As an improvement, the locking structure is provided with a first buckle, and the cover assembly is provided with a first latch that is adapted to the first buckle. The first buckle is connected to the first latch to lock the cover assembly by rotation, and the first buckle is disengaged from the first latch to unlock the cover assembly by rotation. In this technical solution, a first buckle is provided on the locking structure and a first latch is provided on the cover assembly. When the first buckle is connected to the first latch, the cover assembly is firmly locked to the housing, preventing the cover assembly from rotating during pencil sharpening. When the pencil is sharpened, the pencil tip pushes the locking structure to move, causing the first buckle to disengage from the first latch, thereby unlocking the cover assembly and allowing it to rotate under the action of the first elastic element. Through the tight cooperation between the first buckle and the first latch, the cover assembly is firmly locked during pencil sharpening, ensuring the stability and reliability of the pencil sharpener. The buckle locking structure is simple, reducing the number and complexity of mechanical parts and lowering production costs. It should be noted that the specific structure of the first latch includes, but is not limited to, a buckle structure and a buckle hole structure. Furthermore, the first buckle can also be set on the cover assembly and the first latch can be set on the locking structure, with the same principle, which will not be elaborated further.

[0008] As an improvement, a bracket is provided inside the housing, the locking structure is slidably mounted on the bracket, and the cover assembly is rotatably connected to the bracket. In this technical solution, the bracket serves as the mounting base for the internal components of the housing, used to install the locking structure and the cover assembly, ensuring the precise installation position and stability of these key components. The cover assembly is rotatably connected to the bracket, and the rotatability of the bracket relative to the housing makes the movement of the cover assembly more flexible and reliable. The rotatable connection between the cover assembly and the bracket can be hidden through the housing, avoiding rotational interference and extending service life. The bracket design makes the installation of the locking structure and the cover assembly more modular, facilitating production and assembly.

[0009] As an improvement, the bracket is provided with a support arm, and the cover assembly is provided with a rotating connection part adapted to the support arm. The support arm is connected to the rotating connection part so that the cover assembly can rotate relative to the housing. In this technical solution, the bracket is provided with a support arm as a rotation support point for the cover assembly, and the cover assembly is provided with a rotating connection part for connecting the support arm, so that the cover assembly can rotate flexibly relative to the housing. The support arm provides a precise rotation support point for the cover assembly, improving rotational stability. Both the support arm on the bracket and the rotating connection part of the cover assembly are located inside the housing. The housing prevents these key components from being exposed. The hidden design prevents users from accidentally contacting the support arm and rotating connection part during use, avoiding damage or injury caused by misoperation, extending the service life of the components, and making the pencil sharpener more integrated and its rotation more reliable.

[0010] As an improvement, the bracket is provided with a mounting post adapted to the first elastic element. The first elastic element is installed inside the mounting post and abuts against the cover assembly. In this technical solution, the mounting post on the bracket provides a precise installation position for the first elastic element, ensuring its stability during operation. One end of the first elastic element abuts against the inner wall of the mounting post, and the other end abuts against the cover assembly, providing effective elastic force. The design of the mounting post ensures the stable installation of the first elastic element and forms an effective abutment relationship with the cover assembly, improving the overall stability and reliability of the pencil sharpener.

[0011] As an improvement, the bracket is equipped with a slide rail adapted to the locking structure. The locking structure cooperates with the slide rail to slide back and forth between a locked position and an unlocked position. The locking structure is mounted on the bracket by means of the slide rail for limiting its position. In this technical solution, the bracket is equipped with a slide rail adapted to the locking structure. The slide rail provides a sliding guide path for the locking structure. The locking structure slides back and forth between the locked and unlocked positions via the slide rail, ensuring the accuracy and stability of the movement, reducing shaking and jamming. Furthermore, the mounting of the locking structure on the bracket via the slide rail prevents the locking structure from detaching from the bracket, improving the stability of the locking structure in use. The limiting function of the slide rail and the precise cooperation of the locking structure improve the structural reliability of the entire pencil sharpener.

[0012] As an improvement, the blade holder assembly includes a blade holder and a blade mounted on the blade holder. The blade holder has a sharpening groove for the pencil to pass through, and the locking structure has an abutment structure adapted to the sharpening groove. The abutment structure is inserted into the sharpening groove to connect the locking structure with the blade holder assembly. In this technical solution, the blade holder assembly consists of a blade holder and a blade. The blade holder has a sharpening groove to fix the pencil, and the blade sharpens the pencil in the sharpening groove. The locking structure has an abutment structure that is inserted into the sharpening groove, so that the locking structure and the blade holder assembly form a stable linkage relationship, ensuring that the movement between the two can be accurately transmitted. The pencil tip can push the locking structure to slide through the abutment structure, improving the reliability of use. On the other hand, the abutment structure and the locking structure can be an integral structure or a separate structure, both of which are within the protection scope of this application.

[0013] As an improvement, the cover assembly includes a cover plate and a cartoon decorative piece, which is connected to the cover plate for synchronous rotation. In this technical solution, the cover assembly is composed of a cover plate and a cartoon decorative piece. The cover plate can drive the cartoon decorative piece to rotate synchronously. When the cover assembly rotates, the cartoon decorative piece can move together with the cover plate, forming a unified visual effect. The design of the cartoon decorative piece not only increases the aesthetics of the product but also improves the indicative function of the cover assembly, providing a more intuitive and obvious reminder to the user that sharpening is complete, thus enhancing the user experience.

[0014] As an improvement, the housing is detachably connected to a shavings box. In this technical solution, the shavings box is used to collect pencil shavings generated during the sharpening process, preventing them from scattering on the outside and keeping the environment clean. The housing and the shavings box are detachably connected, making it convenient for users to clean and replace them as needed. When not in use, the shavings box can be hidden inside the housing, reducing exposed parts and improving the overall aesthetics and safety. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a pencil sharpener that can prompt for sharpening, according to this application.

[0016] Figure 2 This is an exploded structural diagram of a pencil sharpener that provides a tipping function, as described in this application.

[0017] Figure 3 This is a cross-sectional structural diagram of a pencil sharpener that can prompt for sharpening, according to this application.

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

[0019] Figure 5 This is the locking structure in this application.

[0020] Figure 6 This is a three-dimensional structural diagram of the cover component in this application.

[0021] The figure shows: 1. Housing; 2. Blade holder assembly; 21. Blade holder; 211. Sharpening groove; 22. Blade; 3. Cover assembly; 31. First snap-fit; 32. Rotating connection; 33. Cover plate; 34. Cartoon decorative piece; 4. Locking structure; 41. First snap-fit; 42. Abutment structure; 5. First elastic element; 6. Second elastic element; 7. Bracket; 71. Support arm; 72. Mounting post; 73. Slide rail; 8. Chip box. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] like Figures 1 to 6As shown, this application discloses a pencil sharpener with a sharpening indicator, including a housing 1 and a blade holder assembly 2 installed within the housing 1, a cover assembly 3, and a locking structure 4. The cover assembly 3 is rotatably connected to the housing 1, and the locking structure 4 is used to rotate and lock or unlock the cover assembly 3. A first elastic element 5 is provided between the cover assembly 3 and the housing 1. The locking structure 4 is movably installed within the housing 1 and connected to the blade holder assembly 2. The housing 1 is used to accommodate the blade holder assembly 2, the cover assembly 3, and the locking structure 4, providing stable support and protection for each component. The blade holder assembly 2 is used to fix and sharpen pencils. The cover assembly 3 is rotatably connected to the housing 1 and is used to cover and protect the internal structure of the pencil sharpener. A movable locking structure 4 is added within the housing 1. The locking structure 4 can move between a locked position and an unlocked position, mainly used to rotate and lock or unlock the cover assembly 3. The locking structure 4 is connected to the blade holder assembly 2. In the initial state, the locking structure 4 is in the locked position, fixing the cover assembly 3 to the housing 1. The pencil is inserted into the blade holder assembly 2. As the pencil sharpener rotates, the pencil is gradually sharpened. When the pencil is sharpened in the blade holder assembly 2, the pencil tip can push the locking structure 4 to move through the blade holder assembly 2, causing the locking structure 4 to move from the locked position to the unlocked position, releasing the lock on the cover assembly 3. The cover assembly 3 can rotate relative to the housing 1 through the force of the first elastic element 5, thus indicating that the sharpening is complete. Through the rotation of the cover assembly 3, the user can intuitively know that the pencil has been sharpened without having to constantly observe the sharpening process, which improves the convenience and efficiency of use, reduces the risk of misjudgment, and enhances the user experience. The sharpening indication function is realized by using a simple mechanical structure, which is compact, highly reliable, and easy to manufacture and maintain.

[0027] More specifically, such as Figures 2 to 5 As shown, the locking structure 4 is slidably installed inside the housing 1. The locking structure 4 can slide between the locked position and the unlocked position relative to the cover assembly 3. The locking structure 4 is slidably installed inside the housing 1 to achieve sliding between the locked position and the unlocked position. The cover assembly 3 is locked and unlocked by sliding. When the pencil is sharpened, the pencil tip pushes the locking structure 4 to slide to the unlocked position. The unlocking process is quick and reliable, ensuring that the cover assembly 3 can respond in time and indicate that the sharpening is complete.

[0028] More specifically, such as Figure 2 and Figure 3 As shown, a second elastic element 6 is provided between the locking structure 4 and the housing 1. The second elastic element 6 is used to keep the locking structure 4 in the locked position. By adding the second elastic element 6, the locking structure 4 is kept in the locked position, ensuring that the cover assembly 3 is firmly locked under normal conditions. The cover assembly 3 will not loosen during the sharpening process, which improves the reliability of the sharpening indicator and the stability of the sharpener, and ensures the accuracy of the unlocking action.

[0029] More specifically, such as Figure 3, Figure 5 and Figure 6 As shown, the locking structure 4 is provided with a first buckle 41, and the cover assembly 3 is provided with a first latch 31 adapted to the first buckle 41. The first buckle 41 is connected to the first latch 31 to lock the cover assembly 3 by rotation, and the first buckle 41 is disengaged from the first latch 31 to unlock the cover assembly 3 by rotation. The first buckle 41 is provided on the locking structure 4, and the first latch 31 is provided on the cover assembly 3. When the first buckle 41 is connected to the first latch 31, the cover assembly 3 is firmly locked to the housing 1 to prevent the cover assembly 3 from rotating during pencil sharpening. When the pencil is sharpened, the pencil tip pushes the locking structure 4 to move, causing the first buckle 41 to lock. 1. Disengage from the first latch 31, thereby unlocking the cover assembly 3 and allowing it to rotate under the action of the first elastic element 5. Through the tight cooperation between the first buckle 41 and the first latch 31, the cover assembly 3 is firmly locked during the pencil sharpening process, ensuring the stability and reliability of the pencil sharpener. The buckle locking structure is simple, reducing the number and complexity of mechanical parts and lowering production costs. It should be noted that the specific structure of the first latch 31 includes, but is not limited to, a buckle structure and a buckle hole structure. Furthermore, the first buckle 41 can also be set on the cover assembly 3, and the first latch 31 can be set on the locking structure 4. The principle is the same, and it will not be described in detail here.

[0030] More specifically, such as Figures 2 to 4 As shown, a bracket 7 is provided inside the housing 1, and the locking structure 4 is slidably installed on the bracket 7. The cover assembly 3 is rotatably connected to the bracket 7. The bracket 7 serves as the mounting base for the internal components of the housing 1 and is used to install the locking structure 4 and the cover assembly 3, ensuring the precise installation position and stability of these key components. The cover assembly 3 is rotatably connected to the bracket 7. The bracket 7 can rotate relative to the housing 1, making the movement of the cover assembly 3 more flexible and reliable. The rotatable connection part 32 between the cover assembly 3 and the bracket 7 can be hidden through the housing 1 to avoid rotational interference and extend service life. The bracket 7 makes the installation of the locking structure 4 and the cover assembly 3 more modular, which is convenient for production and assembly.

[0031] More specifically, such as Figure 3 , Figure 4 and Figure 6As shown, the bracket 7 is provided with a support arm 71, and the cover assembly 3 is provided with a rotating connection part 32 adapted to the support arm 71. The support arm 71 is connected to the rotating connection part 32 so that the cover assembly 3 can rotate relative to the housing 1. The support arm 71 on the bracket 7 serves as the rotation support point of the cover assembly 3. The rotating connection part 32 on the cover assembly 3 is used to connect the support arm 71, so that the cover assembly 3 can rotate flexibly relative to the housing 1. The support arm 71 provides a precise rotation support point for the cover assembly 3, improving rotational stability. The support arm 71 on the bracket 7 and the rotating connection part 32 on the cover assembly 3 are both located inside the housing 1. The housing 1 prevents these key components from being exposed. The hidden design can prevent users from accidentally contacting the support arm 71 and the rotating connection part 32 during use, avoiding damage or injury caused by misoperation, extending the service life of the components, and making the overall integrity of the pencil sharpener better and the rotation more reliable.

[0032] More specifically, such as Figures 2 to 4 As shown, the bracket 7 is provided with a mounting post 72 adapted to the first elastic element 5. The first elastic element 5 is installed in the mounting post 72 and abuts against the cover assembly 3. The mounting post 72 on the bracket 7 provides a precise installation position for the first elastic element 5, so that the first elastic element 5 remains stable during operation. One end of the first elastic element 5 abuts against the inner wall of the mounting post 72, and the other end abuts against the cover assembly 3, providing effective elastic force. The design of the mounting post 72 ensures the stable installation of the first elastic element 5 and forms an effective abutment relationship with the cover assembly 3, improving the overall stability and reliability of the pencil sharpener.

[0033] More specifically, such as Figures 2 to 4 As shown, the bracket 7 is provided with a slide rail 73 adapted to the locking structure 4. The locking structure 4 cooperates with the slide rail 73 to slide back and forth between the locked position and the unlocked position. The locking structure 4 is limited and installed on the bracket 7 by the slide rail 73. The slide rail 73 provides a sliding guide path for the locking structure 4. The locking structure 4 slides back and forth between the locked position and the unlocked position by the slide rail 73, ensuring the accuracy and stability of the movement, reducing shaking and jamming. Furthermore, the locking structure 4 is installed on the bracket 7 by the slide rail 73, which can prevent the locking structure 4 from falling off the bracket 7, improving the stability of the locking structure 4 in use. The limiting function of the slide rail 73 and the precise cooperation of the locking structure 4 improve the structural reliability of the entire pencil sharpener.

[0034] More specifically, such as Figure 3As shown, the pencil holder assembly 2 includes a pencil holder 21 and a blade 22 mounted on the pencil holder 21. The pencil holder 21 has a pencil sharpening groove 211 for the pencil to pass through. The locking structure 4 has an abutment structure 42 adapted to the pencil sharpening groove 211. The abutment structure 42 is inserted into the pencil sharpening groove 211 to connect the locking structure 4 with the pencil holder assembly 2. The pencil holder assembly 2 is composed of a pencil holder 21 and a blade 22. The pencil holder 21 has a pencil sharpening groove 211 for fixing the pencil. The pencil is sharpened in the pencil sharpening groove 211 by the blade 22. The locking structure 4 has an abutment structure 42, which is inserted into the pencil sharpening groove 211, so that the locking structure 4 and the pencil holder assembly 2 form a stable linkage relationship, ensuring that the movement between the two can be accurately transmitted. The pencil tip can push the locking structure 4 to slide through the abutment structure 42, improving the reliability of use. On the other hand, the abutment structure 42 and the locking structure 4 can be an integral structure or a separate structure, both of which are within the protection scope of this application.

[0035] More specifically, such as Figure 2 and Figure 6 As shown, the cover assembly 3 includes a cover plate 33 and a cartoon decorative piece 34. The cartoon decorative piece 34 is connected to the cover plate 33 for synchronous rotation. The cover assembly 3 is composed of the cover plate 33 and the cartoon decorative piece 34. The cover plate 33 can drive the cartoon decorative piece 34 to rotate synchronously. When the cover assembly 3 rotates, the cartoon decorative piece 34 can move together with the cover plate 33 to form a unified visual effect. The design of the cartoon decorative piece 34 not only increases the aesthetics of the product, but also improves the indicative function of the cover assembly 3, which can more intuitively and clearly remind the user that the sharpening is complete, thus improving the user experience.

[0036] More specifically, such as Figure 2 As shown, the housing 1 is detachably connected to a shavings box 8, which is used to collect pencil shavings generated during the sharpening process, preventing pencil shavings from scattering outside and keeping the environment clean. The housing 1 and the shavings box 8 are detachably connected, which makes it convenient for users to clean and replace them as needed. When not in use, the shavings box 8 can be hidden inside the housing 1, reducing exposed parts and improving the overall aesthetics and safety.

[0037] 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. A pencil sharpener with a sharpening indicator, comprising a housing (1) and a blade holder assembly (2) mounted within the housing (1), characterized in that, It also includes a cover assembly (3) and a locking structure (4). The cover assembly (3) is rotatably connected to the housing (1). The locking structure (4) is used to lock or unlock the cover assembly (3) by rotation. A first elastic element (5) is provided between the cover assembly (3) and the housing (1). The locking structure (4) is movably installed in the housing (1) and connected to the blade holder assembly (2). When the pencil is sharpened in the blade holder assembly (2), the pencil tip pushes the locking structure (4) from the locked position to the unlocked position, so that the locking structure (4) and the cover assembly (3) are unlocked. The cover assembly (3) rotates relative to the housing (1) under the action of the first elastic element (5) to indicate that the sharpening is complete.

2. A pencil sharpener with a sharpening prompt according to claim 1, characterized in that, The locking structure (4) is slidably installed inside the housing (1), and the locking structure (4) can slide relative to the cover assembly (3) between the locked position and the unlocked position; a second elastic member (6) is provided between the locking structure (4) and the housing (1), and the second elastic member (6) is used to keep the locking structure (4) in the locked position.

3. A pencil sharpener with a sharpening prompt according to claim 1, characterized in that, The locking structure (4) is provided with a first buckle (41), and the cover assembly (3) is provided with a first latch (31) adapted to the first buckle (41). The first buckle (41) is connected to the first latch (31) so that the cover assembly (3) can be rotated to lock. The first buckle (41) is disengaged from the first latch (31) so that the cover assembly (3) can be rotated to unlock.

4. A pencil sharpener with a sharpening prompt according to claim 1, characterized in that, The housing (1) is provided with a bracket (7), the locking structure (4) is slidably installed on the bracket (7), and the cover assembly (3) is rotatably connected to the bracket (7).

5. A pencil sharpener with a sharpening prompt according to claim 4, characterized in that, The bracket (7) is provided with a support arm (71), and the cover assembly (3) is provided with a rotating connection part (32) adapted to the support arm (71). The support arm (71) is connected to the rotating connection part (32) so that the cover assembly (3) can rotate relative to the shell (1).

6. A pencil sharpener with a sharpening prompt according to claim 4, characterized in that, The bracket (7) is provided with a mounting post (72) adapted to the first elastic member (5), and the first elastic member (5) is installed in the mounting post (72) and abuts against the cover assembly (3).

7. A pencil sharpener with a sharpening prompt according to claim 4, characterized in that, The bracket (7) is provided with a slide rail (73) adapted to the locking structure (4). The locking structure (4) cooperates with the slide rail (73) to slide back and forth between the locked position and the unlocked position. The locking structure (4) is limited and installed on the bracket (7) by the slide rail (73).

8. A pencil sharpener with a sharpening prompt according to claim 1, characterized in that, The tool holder assembly (2) includes a tool holder (21) and a blade (22) mounted on the tool holder (21). The tool holder (21) is provided with a sharpening groove (211) for a pen to pass through. The locking structure (4) is provided with an abutment structure (42) adapted to the sharpening groove (211). The abutment structure (42) is inserted into the sharpening groove (211) to connect the locking structure (4) with the tool holder assembly (2).

9. A pencil sharpener with a sharpening prompt according to claim 1, characterized in that, The cover assembly (3) includes a cover plate (33) and a cartoon decorative piece (34), wherein the cartoon decorative piece (34) is connected to the cover plate (33) for synchronous rotational engagement.

10. A pencil sharpener with a sharpening prompt according to claim 1, characterized in that, The housing (1) is detachably connected to a chip box (8).

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