Pencil sharpener

Abstract

The pencil sharpener comprises a shell, a tool bit assembly is detachably installed on the shell, a pencil inlet is formed in the tool bit assembly, a cover plate is installed on the shell in a sliding mode, and the surface of the side, provided with the cover plate, of the shell is connected with the surface of the side, provided with the pencil inlet, of the tool bit assembly. The cover plate slides back and forth to expose the pencil inlet or cover the pencil inlet, when the cover plate slides to the joint of the tool bit assembly and the surface of the shell, the cover plate abuts against the tool bit assembly so that the tool bit assembly can be limited on the shell, and when the cover plate slides to be completely separated from the tool bit assembly, the tool bit assembly can be detached relative to the shell. The cover plate not only has the function of preventing ash leakage, but also integrates the locking and unlocking functions of the tool bit assembly, a user can move the cover plate through simple sliding operation, and the functions of preventing ash leakage, sharpening a pencil, disassembling the tool bit assembly and the like are completed.

Description

Technical Field

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

[0002] Pencil sharpeners, a common stationery item, are widely used in schools, offices, and other places. They are tools used to remove the outer wood layer of pencils to expose the lead inside. Traditional pencil sharpeners typically consist of a housing and a blade assembly. The housing has a pencil inlet that communicates with the blade assembly. The pencil is inserted into the housing through the inlet and then cut by the blade assembly. During the sharpening process, the blade assembly produces pencil dust and wood shavings, which leak out from the inlet. This can easily contaminate storage containers or the environment, especially when using the pencil at an angle or quickly withdrawing it. To address the aforementioned issues, a utility model patent with authorization announcement number CN207140637U discloses a double-hole pencil sharpener, comprising: a body and a blade holder. The upper part of the body has an inner cavity for accommodating the shavings generated during sharpening; the blade holder has a pencil hole on its surface and is fixedly installed inside the body, with the sharpener fixedly installed on the blade holder; to effectively protect the pencil hole and the sharpener, the double-hole pencil sharpener also includes: a sliding cover; furthermore, the bottom of the body has an elongated hole, and the blade holder is fixedly installed inside the body with the pencil hole facing downwards, the pencil hole and the elongated hole being positioned opposite each other, and there is a gap between the blade holder and the bottom of the body, with the sliding cover movably installed in this gap; in use, sliding the sliding cover exposes the pencil hole, allowing the pencil to be sharpened from the hole. The elongated hole passes through the pen hole and contacts the shaving blade. After use, the sliding cover is slid in the opposite direction to cover the pen hole, effectively protecting both the pen hole and the shaving blade. Although this technical solution protects the pen hole and shaving blade by setting a sliding cover, thus providing some protection against dust leakage, it does not mention a limiting or locking mechanism between the blade holder and the main body. If the pencil sharpener is shaken or dropped, the blade holder is prone to loosening or even falling off, causing pencil shavings to spill out. This not only affects the normal use of the pencil sharpener but may also cut the user's fingers, posing a certain safety hazard. On the other hand, the blade holder of this pencil sharpener is fixedly installed inside the main body. Once installed, the blade holder is difficult to disassemble, making it inconvenient for maintenance and replacement, and failing to meet various usage needs. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide a pencil sharpener that has a sliding cover plate. The cover plate not only has the function of preventing dust leakage, but also integrates the locking and unlocking functions of the blade assembly. The user can move the cover plate by a simple sliding operation to complete the functions of preventing dust leakage, sharpening pencils, and disassembling the blade assembly. The operation is simple and the user experience is good.

[0004] This application provides a pencil sharpener, including a housing, on which a blade assembly is detachably mounted. The blade assembly has a pencil inlet. A cover plate is slidably mounted on the housing. The surface of the housing with the cover plate is engaged with the surface of the blade assembly with the pencil inlet. The cover plate can slide back and forth to expose or cover the pencil inlet. When the cover plate slides to the engagement point between the surface of the blade assembly and the housing, the cover plate abuts against the blade assembly, thereby confining the blade assembly to the housing. When the cover plate slides to the point where it is completely disengaged from the blade assembly, the blade assembly is detachable relative to the housing.

[0005] In this technical solution, the blade assembly is designed to be detachable, allowing users to replace it as needed. A pen inlet is provided on the blade assembly for inserting pencils or other writing instruments. A cover plate is slidably mounted on the housing, with the surface of the housing engaging with the surface of the blade assembly. This ensures precise and smooth sliding of the cover plate during sliding, effectively covering or exposing the pen inlet. The cover plate exposes the pen inlet by sliding, enabling normal use of the pencil sharpening function. Covering the pen inlet by sliding prevents dust leakage. The cover plate abuts against the blade assembly, securing it to the housing and preventing loosening or detachment during use, thus enhancing the stability and safety of the pencil sharpener. Disconnecting the cover plate from the blade assembly releases the restriction, allowing for blade replacement or cleaning of internal debris, improving product maintenance convenience.

[0006] The cover plate has at least three sliding states on the surface of the housing and the surface of the blade assembly. First, the cover plate slides to completely cover the pencil inlet, preventing the blade assembly from sharpening pencils. At this point, the cover plate and blade assembly are in vertical contact, thus confining the blade assembly to the housing. Second, the cover plate slides to the point where the blade assembly and the housing surface meet, exposing the pencil inlet. Again, the cover plate and blade assembly are in vertical contact, confining the blade assembly to the housing, allowing the blade assembly to sharpen pencils normally. Third, the cover plate slides to completely detach from the blade assembly, exposing the pencil inlet. The vertical restraint between the cover plate and the blade assembly is released, allowing the blade assembly to be removed from the housing for easy maintenance or cleaning of internal debris. Through the restraint between the cover plate and the blade assembly, the blade assembly is firmly fixed during use, preventing loosening or detachment due to external forces such as shaking or drops, thus reducing the risk of pencil shavings spilling or the blade scratching the user.

[0007] The sliding cover not only prevents dust leakage and protects the pen inlet, but also provides a limit locking function in conjunction with the cutter head assembly. At the same time, it allows for quick disassembly of the cutter head assembly when needed, reducing the use of additional parts and simplifying the product structure. Users can move the cover with a simple sliding operation to complete functions such as preventing dust leakage, sharpening pens, and disassembling the cutter head assembly, simplifying the operation process and reducing maintenance costs.

[0008] As an improvement, the housing is provided with a limiting buckle, and the cover plate is provided with a first sliding groove adapted to the limiting buckle. The limiting buckle is connected to the first sliding groove so that the cover plate is limited and installed on the housing and can slide relative to the housing. In this technical solution, the limiting buckle and the housing are connected to achieve a limiting fit, ensuring that the cover plate slides on the housing along a predetermined trajectory, while preventing the cover plate from falling off the housing or deviating from the track during sliding. The design of the limiting buckle and the sliding groove is simple, easy to manufacture and assemble, and reduces complex mechanical structures and additional parts while ensuring functionality, thus reducing production costs. On the other hand, in this solution, two limiting buckles are symmetrically arranged on the housing, and two first sliding grooves are symmetrically arranged on the cover plate. The limiting buckles on the same side are connected to the first sliding groove. The cooperation of the two limiting buckles and the sliding groove can more accurately guide the sliding path of the cover plate and improve the stability of the connection between the cover plate and the housing.

[0009] As an improvement, the housing is provided with a positioning protrusion, and the cover plate is provided with a first groove adapted to the positioning protrusion. The first groove connects with the positioning protrusion to allow the cover plate to slide and be positioned. When the cover plate slides to the point where the first groove connects with the positioning protrusion, the cover plate covers the pen inlet and abuts against the blade assembly. In this technical solution, the housing is provided with a positioning protrusion, and the cover plate is provided with a first groove. The two are connected by a convex-concave fit, providing a clear positioning point for the sliding of the cover plate. This ensures that the cover plate can accurately reach the predetermined position during the sliding process, that is, the cover plate completely covers the pen inlet. At this time, the cooperation between the positioning protrusion and the first groove provides a fixing force to prevent the cover plate from sliding on its own due to external force or vibration. When the cover plate slides to the point where the first groove connects with the positioning protrusion, the cover plate covers the pen inlet and abuts against the blade assembly. The positioning protrusion can hold the cover plate in place, keeping it in the current position. This not only prevents the cover plate from sliding off but also further fixes the blade assembly by abutting, ensuring its stability during use.

[0010] As an improvement, the cover plate is provided with a second groove that matches the positioning protrusion. The cover plate slides under force to allow the first and second grooves to switch connections with the positioning protrusion. When the cover plate slides to the point where the second groove connects with the positioning protrusion, the cover plate exposes the pen inlet and abuts against the blade assembly. In this technical solution, the cover plate is provided with a first groove and a second groove, both of which match the positioning protrusion on the housing, providing two positioning points for the cover plate. The user can quickly switch the state of the cover plate through a simple sliding operation, allowing the first and second grooves to switch connections with the positioning protrusion, thereby opening or closing the pen inlet. The cover plate can achieve precise positioning in both positions, preventing the cover plate from sliding on its own due to external force or vibration. When the cover plate slides to the point where the second groove connects with the positioning protrusion, the cover plate exposes the pen inlet and, through abutting against the blade assembly, further fixes the blade assembly, preventing it from loosening or falling off during use, thus improving the reliability of the pencil sharpener.

[0011] As an improvement, the cover plate is provided with a third groove that matches the positioning protrusion. The cover plate slides under force to switch the connection between the first groove and the third groove to the positioning protrusion. When the cover plate slides to the point where the third groove is connected to the positioning protrusion, the cover plate exposes the pen inlet and disengages from the cutter head assembly. In this technical solution, the cover plate is provided with a first groove, a second groove, and a third groove, all of which are adapted to the positioning protrusions on the housing, providing three positioning points for the cover plate. The user can quickly switch the state of the cover plate through a simple sliding operation, so that the first groove, the second groove, and the third groove can switch to connect with the positioning protrusion, thereby realizing the opening or closing of the pen inlet and the locking and unlocking of the blade assembly. The cover plate can achieve precise positioning in the three positions, preventing the cover plate from sliding on its own due to external force or vibration. When the cover plate slides to the third groove and connects with the positioning protrusion, the cover plate exposes the pen inlet and disengages from the blade assembly, thereby completely releasing the cover plate from limiting the blade assembly. The blade assembly can be removed from the housing for easy replacement of the blade or cleaning of the blade assembly. The multi-groove design and the matching structure of the positioning protrusions are simple, easy to manufacture and assemble, and do not occupy extra space.

[0012] As an improvement, a locking element is movably mounted on the housing, and the cutter head assembly is provided with a latch for the locking element to pass through. The locking element is connected to a cover plate, and the cover plate slides to drive the locking element to insert into or disengage from the latch. The locking element is connected to the latch to limit the cutter head assembly to the housing, and the locking element disengages from the latch to make the cutter head assembly detachable relative to the housing. In this technical solution, the cooperation between the locking element and the latch enables the locking and unlocking functions of the cutter head assembly on the housing. By combining the sliding action of the cover plate with the operation of the locking element, the user can lock or unlock the cutter head assembly by sliding the cover plate without additional operating steps. This not only ensures the stability of the cutter head assembly during use but also facilitates quick replacement of the cutter head assembly when needed. The linkage design between the locking element and the cover plate reduces the use of additional parts, resulting in a compact overall structure that is easy to manufacture and assemble.

[0013] As an improvement, the housing is provided with a mounting structure adapted to the locking member, and the locking member is movably mounted on the mounting structure. The mounting structure has an elastic part that abuts against the locking member, and the locking member is movably reset through the elastic part. Alternatively, an elastic element is provided between the mounting structure and the locking member, and the locking member is movably reset through the elastic element. In this technical solution, the housing is provided with a mounting structure for movably mounting the locking member, enabling the locking member to achieve locking and unlocking functions through movement, improving the installation stability of the locking member, and ensuring that the locking member can work normally. By providing an elastic part that abuts against the locking member in the mounting structure, or by providing an elastic element between the mounting structure and the locking member, the elastic part or elastic element provides elastic support for the locking member, enabling it to automatically reset after being subjected to external force, simplifying the user's operation steps. The elastic part can be part of the mounting structure, such as an elastic rib or elastic groove, while the elastic element can be an independent elastic element, such as a spring or a spring sheet.

[0014] As an improvement, the locking component is equipped with a linkage rod adapted to the cover plate. The housing has a through hole for the linkage rod to pass through, and the linkage rod passes through the through hole to connect with the cover plate. The cover plate drives the locking component to move through the linkage rod. The linkage rod and the locking component are integrally formed. In this technical solution, the linkage rod, as a mechanical component connecting the cover plate and the locking component, extends through the through hole on the housing and connects to the cover plate, thereby transmitting the sliding motion of the cover plate to the locking component and driving its movement. The linkage rod realizes the linkage between the cover plate and the locking component, making the locking and unlocking of the locking component more reliable and efficient. The linkage rod and the locking component are manufactured using an integral molding process to form a single component, reducing assembly steps and connection points, and improving the stability and reliability of the structure.

[0015] As an improvement, the cover plate is provided with a clearance groove adapted to the linkage rod. When the cover plate slides to the end of the housing away from the cutter head assembly, the clearance groove slides to the position corresponding to the linkage rod. The linkage rod inserts into the clearance groove through elastic force, so that the locking member disengages from the latch through elastic force. In this technical solution, the clearance groove added to the cover plate provides a specific receiving position for the linkage rod, allowing the linkage rod to be smoothly inserted, thereby providing space for the locking member to reset. When the cover plate slides to the end of the housing away from the cutter head assembly, the cover plate is completely disengaged from the cutter head assembly, and the clearance groove is opposite to the linkage rod. At this time, the linkage rod can be inserted into the clearance groove, thereby providing space for the locking member to reset. The locking member can be moved and reset under elastic force, thereby disengaging from the latch of the cutter head assembly. The cutter head assembly is released from its limit and can be detached from the housing. The locking member is unlocked through the cooperation of the clearance groove and the linkage rod. This design realizes the quick locking and unlocking function of the cutter head assembly, which is simple to operate and highly reliable.

[0016] As an improvement, the blade assembly is provided with a plug-in portion, and the housing is provided with a socket adapted to the plug-in portion, the plug-in portion connecting to the socket; the cover plate is provided with an inwardly recessed force-applying portion, the force-applying portion being subjected to force to drive the cover plate to slide back and forth. In this technical solution, the plug-in portion and the socket cooperate to achieve quick installation and fixation of the blade assembly and the housing, allowing users to quickly install the blade assembly onto the housing or remove it from the housing. The cooperation between the plug-in portion and the socket provides a stable mechanical connection, ensuring that the blade assembly will not loosen during use, improving the installation stability of the blade assembly; the force-applying portion provides a force point for the cover plate to slide, allowing users to apply force to the force-applying portion with their fingers or other tools, thereby driving the cover plate to slide back and forth. The inwardly recessed structural design facilitates user force application, while reducing the occupation of external space, saving effort and improving the user experience. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a pencil sharpener according to this application.

[0018] Figure 2 This is an exploded structural diagram of a pencil sharpener according to this application.

[0019] Figure 3 This is a three-dimensional structural diagram of the cover plate in Embodiment 2 of this application.

[0020] Figure 4 This is a cross-sectional schematic diagram of the pencil sharpener when the first groove and the positioning protrusion are connected in Embodiment 2 of this application.

[0021] Figure 5 This is a cross-sectional schematic diagram of the pencil sharpener when the second groove and the positioning protrusion are connected in Embodiment 2 of this application.

[0022] Figure 6 This is a cross-sectional schematic diagram of the pencil sharpener when the third groove and the positioning protrusion are connected in Embodiment 2 of this application.

[0023] Figure 7 This is a cross-sectional view of the pencil sharpener when the locking element and the buckle are connected in Embodiment 3 of this application.

[0024] Figure 8 For this application Figure 7 A magnified view of a portion of point A in the middle.

[0025] Figure 9 This is a cross-sectional schematic diagram of the pencil sharpener when the locking element is disengaged from the buckle in Embodiment 3 of this application.

[0026] Figure 10 This is a three-dimensional structural diagram of the cover plate in Embodiment 3 of this application.

[0027] The figure shows: 1. Housing; 11. Limiting buckle; 12. Insertion hole; 13. Positioning protrusion; 14. Mounting structure; 141. Elastic part; 15. Through hole; 2. Cutting head assembly; 21. Pen inlet; 22. Insertion part; 23. Buckle; 3. Cover plate; 31. First sliding groove; 32. Force application part; 33. First groove; 34. Second groove; 35. Third groove; 36. Alternating groove; 4. Locking element; 41. Linkage rod. Detailed Implementation

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Example 1

[0033] like Figures 1 to 6 As shown, this application discloses a pencil sharpener, including a housing 1, a detachable blade assembly 2 on the housing 1, a pencil inlet 21 on the blade assembly 2, and a cover plate 3 slidably mounted on the housing 1. The surface of the housing 1 on which the cover plate 3 is mounted engages with the surface of the blade assembly 2 on which the pencil inlet 21 is located. The cover plate 3 can slide back and forth to expose or cover the pencil inlet 21. The blade assembly 2 is designed to be detachable, allowing users to replace the blade assembly 2 as needed. The pencil inlet 21 on the blade assembly 2 is used to insert pencils or other writing instruments. The cover plate 3 is slidably mounted on the housing 1, and the engagement between the surface of the housing 1 and the surface of the blade assembly 2 ensures that the cover plate 3 can precisely cooperate with the blade assembly 2 during sliding, and the sliding is smooth and efficient, effectively covering or exposing the pencil inlet 21. The cover plate 3 exposes the pencil inlet 21 by sliding, thereby enabling the normal use of the pencil sharpening function. The cover plate 3 covers the pencil inlet 21 by sliding, thereby preventing dust leakage.

[0034] like Figure 5 As shown, when the cover plate 3 slides to the surface joint between the cutter head assembly 2 and the housing 1, the cover plate 3 abuts against the cutter head assembly 2, thereby confining the cutter head assembly 2 onto the housing 1, as shown. Figure 6 As shown, when the cover plate 3 slides to completely disengage from the blade assembly 2, the blade assembly 2 becomes detachable from the housing 1. By abutting against the blade assembly 2 with the cover plate 3, the blade assembly 2 can be confined to the housing 1, thus fixing the blade assembly 2 and preventing it from loosening or falling off during use, thereby enhancing the stability and safety of the pencil sharpener. By disengaging the cover plate 3 from the blade assembly 2, the blade assembly 2 can be released from its confinement, allowing for disassembly of the blade assembly 2. This facilitates the replacement of the blade or the cleaning of internal debris, improving the product's maintenance convenience.

[0035] The cover plate 3 has at least three sliding states on the surface of the housing 1 and the surface of the cutter head assembly 2, one of which is: Figure 4 As shown, when the cover plate 3 slides to completely cover the pencil inlet 21, the blade assembly 2 cannot sharpen the pencil, and at this time the cover plate 3 and the blade assembly 2 abut against each other, thereby confining the blade assembly 2 to the housing 1; the second is: as Figure 5 As shown, the cover plate 3 slides to the joint between the blade assembly 2 and the surface of the housing 1, exposing the pencil inlet 21. The cover plate 3 and the blade assembly 2 abut against each other, thereby confining the blade assembly 2 to the housing 1. At this time, the blade assembly 2 can normally sharpen pencils; the third is: as Figure 6 As shown, the cover plate 3 slides until it is completely separated from the blade assembly 2, exposing the pen inlet 21. The upper and lower limits of the cover plate 3 and the blade assembly 2 are released. At this time, the blade assembly 2 can be removed from the housing 1, which is convenient for the maintenance of the blade assembly 2 or cleaning of internal debris. Through the abutment and limit of the cover plate 3 and the blade assembly 2, the blade assembly 2 is firmly fixed during use, avoiding loosening or falling off due to external forces such as shaking or falling, thereby reducing the risk of pen shavings spilling or the blade scratching the user.

[0036] The sliding cover 3 not only prevents dust leakage and protects the pen inlet 21, but also achieves a limit locking function in cooperation with the cutter head assembly 2. At the same time, it allows for quick disassembly of the cutter head assembly 2 when needed, reducing the use of additional parts and simplifying the product structure. Users can move the cover 3 with a simple sliding operation to complete functions such as preventing dust leakage, sharpening pens, and disassembling the cutter head assembly 2, which simplifies the operation process and reduces maintenance costs.

[0037] More specifically, such as Figure 2 and Figure 3 As shown, the housing 1 is provided with a limiting buckle 11, and the cover plate 3 is provided with a first sliding groove 31 adapted to the limiting buckle 11. The limiting buckle 11 is connected to the first sliding groove 31 so that the cover plate 3 is limited and installed on the housing 1 and can slide relative to the housing 1. The limiting engagement between the cover plate 3 and the housing 1 is achieved through the connection between the limiting buckle 11 and the sliding groove, ensuring that the cover plate 3 slides on the housing 1 along a predetermined trajectory, while preventing the cover plate 3 from falling off the housing 1 or deviating from the track during the sliding process. The design of the limiting buckle 11 and the sliding groove is simple, easy to manufacture and assemble, and reduces complex mechanical structures and additional parts while ensuring functionality, thus reducing production costs. On the other hand, in this solution, two limiting buckles 11 are symmetrically arranged on the housing 1, and two first sliding grooves 31 are symmetrically arranged on the cover plate 3. The limiting buckles 11 on the same side are connected to the first sliding groove 31. The cooperation of the two limiting buckles 11 and the sliding groove can more accurately guide the sliding path of the cover plate 3 and improve the stability of the connection between the cover plate 3 and the housing 1.

[0038] More specifically, such as Figure 2 As shown, the cutter head assembly 2 is provided with a plug-in part 22, and the housing 1 is provided with a plug hole 12 that is adapted to the plug-in part 22. The plug-in part 22 is connected to the plug hole 12. Through the cooperation of the plug-in part 22 and the plug hole 12, the cutter head assembly 2 and the housing 1 can be quickly installed and fixed, allowing users to quickly install the cutter head assembly 2 onto the housing 1 or remove it from the housing 1. The cooperation of the plug-in part 22 and the plug hole 12 can provide a stable mechanical connection, ensuring that the cutter head assembly 2 will not loosen during use. On the other hand, the cover plate 3 realizes the vertical limitation of the cutter head assembly 2, and the cooperation of the plug-in part 22 and the plug hole 12 realizes the lateral limitation of the cutter head assembly 2, further improving the installation stability of the cutter head assembly 2.

[0039] More specifically, such as Figure 1 As shown, the cover plate 3 is provided with an inwardly recessed force-applying part 32. The force-applying part 32 is subjected to force to drive the cover plate 3 to slide back and forth. The force-applying part 32 provides a force point for the sliding of the cover plate 3, so that the user can apply force to the force-applying part 32 with their fingers or other tools, thereby driving the cover plate 3 to slide back and forth. The inwardly recessed structural design makes it easy for the user to apply force, while reducing the occupation of external space, saving effort and improving the user experience.

[0040] Example 2

[0041] like Figures 4 to 6 As shown, this embodiment provides a pencil sharpener based on Embodiment 1, with the same structure. The housing 1 has a positioning protrusion 13, and the cover plate 3 has a first groove 33 that matches the positioning protrusion 13. The first groove 33 connects to the positioning protrusion 13 to allow the cover plate 3 to slide and be positioned. Figure 4 As shown, when the cover plate 3 slides to the point where the first groove 33 connects with the positioning protrusion 13, the cover plate 3 covers the pen inlet 21 and abuts against the blade assembly 2. The housing 1 is provided with the positioning protrusion 13, and the cover plate 3 is provided with the first groove 33. The two are connected by the convex-concave fit, providing a clear positioning point for the sliding of the cover plate 3, ensuring that the cover plate 3 can accurately reach the predetermined position during the sliding process, that is, the cover plate 3 completely covers the pen inlet 21. At this time, the positioning protrusion 13 and the first groove 33 provide a fixing force to prevent the cover plate 3 from sliding on its own due to external force or vibration. When the cover plate 3 slides to the point where the first groove 33 connects with the positioning protrusion 13, the cover plate 3 covers the pen inlet 21 and abuts against the blade assembly 2. The positioning protrusion 13 can hold the cover plate 3 in place, keeping it in the current position. This not only prevents the cover plate 3 from sliding off, but also further fixes the blade assembly 2 by abutting, ensuring its stability during use.

[0042] More specifically, such as Figure 5As shown, the cover plate 3 is provided with a second groove 34 that matches the positioning protrusion 13. The cover plate 3 slides under force to switch the connection between the first groove 33 and the second groove 34 and the positioning protrusion 13. When the cover plate 3 slides to the point where the second groove 34 connects with the positioning protrusion 13, the cover plate 3 exposes the pen inlet 21 and abuts against the blade assembly 2. The cover plate 3 is provided with a first groove 33 and a second groove 34, both of which match the positioning protrusion 13 on the housing 1, providing two positioning points for the cover plate 3. The user can easily slide the pen inlet 21. The cover plate 3 can be quickly switched so that the first groove 33 and the second groove 34 can be switched to connect to the positioning protrusion 13, thereby opening or closing the pen inlet 21. The cover plate 3 can be accurately positioned in both positions to prevent it from sliding due to external force or vibration. When the cover plate 3 slides to the second groove 34 and connects to the positioning protrusion 13, the cover plate 3 exposes the pen inlet 21 and further fixes the blade assembly 2 by abutting against it, preventing it from loosening or falling off during use and improving the reliability of the pencil sharpener.

[0043] More specifically, such as Figure 6 As shown, the cover plate 3 is provided with a third groove 35 that matches the positioning protrusion 13. The cover plate 3 slides under force to switch the connection between the first groove 33 and the third groove 35 with the positioning protrusion 13. When the cover plate 3 slides to the point where the third groove 35 connects with the positioning protrusion 13, the cover plate 3 exposes the pen inlet 21 and disengages from the cutter head assembly 2. The cover plate 3 is provided with a first groove 33, a second groove 34 and a third groove 35, all of which are adapted to the positioning protrusion 13 on the housing 1, providing three positioning points for the cover plate 3. The user can quickly switch the state of the cover plate 3 through a simple sliding operation, so that the first groove 33, the second groove 34 and the third groove 35 connect. The three grooves 35 can switch the connection to the positioning protrusion 13, thereby realizing the opening or closing of the pen inlet 21 and the locking and unlocking of the blade assembly 2. The cover plate 3 can be accurately positioned in three positions to prevent the cover plate 3 from sliding on its own due to external force or vibration. When the cover plate 3 slides to the third groove 35 and connects with the positioning protrusion 13, the cover plate 3 exposes the pen inlet 21 and disengages from the blade assembly 2, thereby completely releasing the cover plate 3 from limiting the blade assembly 2. The blade assembly 2 can be removed from the housing 1 for easy replacement of the blade or cleaning of the blade assembly 2. The multi-groove design and the cooperation structure of the positioning protrusion 13 are simple, easy to manufacture and assemble, and do not occupy extra space.

[0044] In this application, the sliding positioning of the cover plate 3 can be achieved not only by the structure of the positioning protrusion 13 and multiple grooves, but also by setting magnetic components on the cover plate 3 and the housing 1 respectively. The principle is the same and will not be described in detail here.

[0045] Example 3

[0046] like Figures 7 to 10As shown, this embodiment provides a pencil sharpener based on Embodiment 1 or Embodiment 2, with the same structure as Embodiment 1 or Embodiment 2. A locking member 4 is movably mounted on the housing 1. The blade assembly 2 has a latch 23 through which the locking member 4 passes. The locking member 4 is connected to the cover plate 3. The cover plate 3 slides to drive the locking member 4 to insert into or disengage from the latch 23. The connection between the locking member 4 and the latch 23 limits the blade assembly 2 to the housing 1. Disengagement of the locking member 4 from the latch 23 makes the blade assembly 2 detachable from the housing 1. The cooperation between the locking member 4 and the latch 23 enables the locking and unlocking functions of the blade assembly 2 on the housing 1. By combining the sliding action of the cover plate 3 with the operation of the locking member 4, the user can lock or unlock the blade assembly 2 simply by sliding the cover plate 3, without any additional steps. This not only ensures the stability of the blade assembly 2 during use but also allows the user to quickly replace the blade assembly 2 when needed. The linkage design between the locking member 4 and the cover plate 3 reduces the use of additional components, resulting in a compact overall structure that is easy to manufacture and assemble.

[0047] More specifically, such as Figure 7 As shown, the housing 1 is provided with an installation structure 14 adapted to the locking member 4. The locking member 4 is movably installed on the installation structure 14. By adding the installation structure 14, the housing 1 is used to movably install the locking member 4, so that the locking member 4 can realize the locking and unlocking functions through movement, thereby improving the installation stability of the locking member 4 and ensuring that the locking member 4 can work normally.

[0048] More specifically, such as Figure 7 As shown, the mounting structure 14 is provided with an elastic part 141 that abuts against the locking member 4. The locking member 4 is repositioned by the elastic part 141. Alternatively, an elastic member is provided between the mounting structure 14 and the locking member 4, and the locking member 4 is repositioned by the elastic member. By providing an elastic part 141 that abuts against the locking member 4 in the mounting structure 14, or by providing an elastic member between the mounting structure 14 and the locking member 4, the elastic part 141 or the elastic member provides elastic support for the locking member 4, enabling it to automatically reset after being subjected to external force, thus simplifying the user's operation steps. The elastic part 141 can be part of the mounting structure 14, such as an elastic rib or an elastic groove, while the elastic member can be an independent elastic element, such as a spring or a spring sheet.

[0049] More specifically, such as Figure 8As shown, the locking component 4 is equipped with a linkage rod 41 that is adapted to the cover plate 3. The housing 1 is provided with a through hole 15 for the linkage rod 41 to pass through. The linkage rod 41 passes through the through hole 15 to connect with the cover plate 3. The cover plate 3 drives the locking component 4 to move through the linkage rod 41. The linkage rod 41, as a mechanical component connecting the cover plate 3 and the locking component 4, extends through the through hole 15 on the housing 1 and connects to the cover plate 3, thereby transmitting the sliding action of the cover plate 3 to the locking component 4 and driving its movement. The linkage rod 41 realizes the linkage between the cover plate 3 and the locking component 4, making the locking and unlocking of the locking component 4 more reliable and efficient. The linkage rod 41 and the locking component 4 are integrally molded structures. The linkage rod 41 and the locking component 4 are manufactured by an integral molding process to form an integral component, reducing assembly links and connection points, and improving the stability and reliability of the structure.

[0050] More specifically, such as Figures 8 to 10 As shown, the cover plate 3 is provided with a relief groove 36 that is adapted to the linkage rod 41. The relief groove 36 provides a specific receiving position for the linkage rod 41, so that the linkage rod 41 can be smoothly inserted, thereby providing space for the reset of the locking member 4.

[0051] When the cover plate 3 slides to cover the pen inlet 21, the cover plate 3 slides on the linkage rod 41 to drive the locking member 4 to move into the buckle 23 of the cutter head assembly 2, thereby limiting the cutter head assembly 2 to the housing 1. At this time, the cutter head assembly 2 cannot be disassembled, and the clearance groove 36 and the linkage rod 41 are misaligned, so that the linkage rod 41 abuts against the cover plate 3, the elastic part 141 or the elastic member is in a compressed state, and the locking member 4 remains connected to the buckle 23.

[0052] like Figure 7 As shown, when the cover plate 3 slides to the surface joint of the cutter head assembly 2 and the housing 1, the pen inlet 21 is exposed, the clearance groove 36 is still misaligned with the linkage rod 41, so that the linkage rod 41 abuts against the cover plate 3, the elastic part 141 or the elastic element is still in a compressed state, the locking part 4 remains connected to the buckle 23, at this time the cutter head assembly 2 cannot be disassembled, and the pen inlet 21 can be used to insert a pen for cutting;

[0053] like Figure 9 As shown, when the cover plate 3 slides to the end of the housing 1 away from the cutter head assembly 2, the cover plate 3 is completely disengaged from the cutter head assembly 2, and the clearance groove 36 is opposite to the linkage rod 41. At this time, the linkage rod 41 can be inserted into the clearance groove 36 to provide a reset space for the locking member 4. The locking member 4 can be reset under the elastic action, thereby disengaging from the buckle 23 of the cutter head assembly 2. The cutter head assembly 2 is released from the limit and can be disassembled from the housing 1.

[0054] The locking element 4 is unlocked by the cooperation of the clearance groove 36 and the linkage rod 41. This design realizes the quick locking and unlocking function of the cutter head assembly 2, which is easy to operate and highly reliable.

[0055] 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, comprising a housing (1), wherein a blade assembly (2) is detachably mounted on the housing (1), characterized in that, The blade assembly (2) is provided with a pen inlet (21), and a cover plate (3) is slidably installed on the housing (1). The surface of the housing (1) on which the cover plate (3) is installed is engaged with the surface of the blade assembly (2) on which the pen inlet (21) is provided. The cover plate (3) can slide back and forth to expose or cover the pen inlet (21). When the cover plate (3) slides to the surface engagement point between the blade assembly (2) and the housing (1), the cover plate (3) abuts against the blade assembly (2) so that the blade assembly (2) is confined on the housing (1). When the cover plate (3) slides to the point where it is completely disengaged from the blade assembly (2), the blade assembly (2) is detachable from the housing (1).

2. A pencil sharpener according to claim 1, characterized in that, The housing (1) is provided with a limiting buckle (11), and the cover plate (3) is provided with a first sliding groove (31) adapted to the limiting buckle (11). The limiting buckle (11) is connected to the first sliding groove (31) so that the cover plate (3) is limited and installed on the housing (1) and can slide relative to the housing (1).

3. A pencil sharpener according to claim 1 or 2, characterized in that, The housing (1) is provided with a positioning protrusion (13), and the cover plate (3) is provided with a first groove (33) that matches the positioning protrusion (13). The first groove (33) is connected to the positioning protrusion (13) so that the cover plate (3) can be slidably positioned. When the cover plate (3) slides to the point where the first groove (33) is connected to the positioning protrusion (13), the cover plate (3) covers the pen inlet (21) and abuts against the cutter head assembly (2).

4. A pencil sharpener according to claim 3, characterized in that, The cover plate (3) is provided with a second groove (34) that matches the positioning protrusion (13). The cover plate (3) slides under force so that the first groove (33) and the second groove (34) switch to connect with the positioning protrusion (13). When the cover plate (3) slides to the point where the second groove (34) connects with the positioning protrusion (13), the cover plate (3) exposes the pen inlet (21) and abuts against the cutter head assembly (2).

5. A pencil sharpener according to claim 3, characterized in that, The cover plate (3) is provided with a third groove (35) that is adapted to the positioning protrusion (13). The cover plate (3) slides under force so that the first groove (33) and the third groove (35) switch to connect with the positioning protrusion (13). When the cover plate (3) slides to the point where the third groove (35) connects with the positioning protrusion (13), the cover plate (3) exposes the pen inlet (21) and the cover plate (3) disengages from the cutter head assembly (2).

6. A pencil sharpener according to claim 1 or 2, characterized in that, A locking member (4) is movably mounted on the housing (1). The cutter head assembly (2) is provided with a latch (23) through which the locking member (4) passes. The locking member (4) is connected to the cover plate (3). The cover plate (3) is slid to drive the locking member (4) to insert into or disengage from the latch (23). The locking member (4) is connected to the latch (23) so that the cutter head assembly (2) is limited to the housing (1). The locking member (4) is disengaged from the latch (23) so that the cutter head assembly (2) is detachable relative to the housing (1).

7. A pencil sharpener according to claim 6, characterized in that, The housing (1) is provided with an installation structure (14) adapted to the locking member (4), and the locking member (4) is movably installed on the installation structure (14); the installation structure (14) is provided with an elastic part (141) that abuts against the locking member (4), and the locking member (4) is movably reset through the elastic part (141), or, an elastic member is provided between the installation structure (14) and the locking member (4), and the locking member (4) is movably reset through the elastic member.

8. A pencil sharpener according to claim 7, characterized in that, The locking member (4) is provided with a linkage rod (41) adapted to the cover plate (3). The housing (1) is provided with a through hole (15) through which the linkage rod (41) passes. The linkage rod (41) passes through the through hole (15) to connect with the cover plate (3). The cover plate (3) drives the locking member (4) to move through the linkage rod (41). The linkage rod (41) and the locking member (4) are integrally formed.

9. A pencil sharpener according to claim 8, characterized in that, The cover plate (3) is provided with a clearance groove (36) that is adapted to the linkage rod (41). When the cover plate (3) slides to the end of the housing (1) away from the cutter head assembly (2), the clearance groove (36) slides to the position corresponding to the linkage rod (41), and the linkage rod (41) inserts into the clearance groove (36) by elastic force so that the locking member (4) disengages from the buckle (23) by elastic force.

10. A pencil sharpener according to claim 1, characterized in that, The blade assembly (2) is provided with a plug-in part (22), and the housing (1) is provided with a plug hole (12) adapted to the plug-in part (22). The plug-in part (22) is connected to the plug hole (12). The cover plate (3) is provided with an inwardly recessed force-applying part (32). The force-applying part (32) is subjected to force to drive the cover plate (3) to slide back and forth.

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