A pencil sharpener

Abstract

This application discloses a pencil sharpener, including a housing with a pencil sharpening mechanism installed inside, and a cover rotatably mounted on the housing. The cover has a first pen inlet for inserting a pencil into the housing. A first adjusting member and a second adjusting member are movably mounted between the housing and the cover. The first and second adjusting members cooperate to open and close the first pen inlet and hold the pencil. Both the first and second adjusting members are linked to the cover. The cover rotates under force to drive the first and second adjusting members to move away from or towards each other. The relative movement of the first and second adjusting members increases the opening size of the first pen inlet, while the relative movement of the first and second adjusting members decreases the opening size of the first pen inlet. This achieves adjustability of the size of the first pen inlet, thereby meeting the pencil sharpening needs of various sizes of pencils.

Description

Technical Field

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

[0002] A pencil sharpener is a stationery item used to sharpen pencils, colored pencils, and other writing instruments. It works by using a built-in blade to shave away the outer wood layer of the pencil through relative movement, exposing the lead inside and making writing and drawing easier. Pencil sharpeners are designed to improve efficiency and safety while reducing the inconvenience and dangers of manual sharpening. Existing pencil sharpeners are typically designed for automatic or semi-automatic operation; users simply insert the pencil and sharpen it with a simple rotating motion, greatly improving efficiency. However, traditional pencil sharpeners lack effective protective devices at the inlet, making it difficult to clean or close promptly after use. When sharpening pencils, wood shavings and lead fragments easily spill out of the sharpener, falling onto the table or floor, and pencil shavings and dust often remain at the inlet, easily contaminating stored items.

[0003] To address the aforementioned issues, a utility model patent with authorization announcement number CN213228133U discloses a pencil sharpener with a protective push cover, comprising a shavings collection box, a blade holder, and a blade holder containing blades. The blade holder is fastened to the top of the shavings collection box; the blade holder is fixedly connected to the bottom surface of the blade holder and located within the cavity of the shavings collection box. The key feature is that an upper cover is fastened to the top of the blade holder, and a protective push cover that can slide left and right along the blade holder is located between the top surface of the blade holder and the bottom surface of the upper cover. When the protective push cover is in the initial position, the sharpening hole on the blade holder is covered and closed. When the protective push cover is pushed to the left to the final position, the sharpening hole on the blade holder is opened. After releasing the hand, the protective push cover automatically returns to the initial position. In this technical solution, the sharpening hole of the pencil sharpener is covered by a protective push cover, effectively protecting the sharpening hole and the blade mounted on it. The upper cover and protective push cover remain connected to the pencil sharpener's holder and will not be lost. During use, simply push the protective push cover forward with one hand to open the sharpening hole and insert the pencil for sharpening, solving the problem of pencil shavings scattering due to an open sharpening hole (i.e., the pencil inlet) in traditional pencil sharpeners. However, this solution has two parallel sharpening holes, one large and one small, for sharpening large and small pencils respectively. This means two blade holders are needed to meet the sharpening needs of pencils of different diameters, increasing material costs and manufacturing complexity. Each blade holder needs to be individually machined and installed, undoubtedly increasing production costs and leading to higher maintenance costs. Furthermore, while the dual-blade holder design can meet the sharpening needs of pencils of different diameters, users can only choose to use the large or small hole, without being able to make more precise adjustments based on the actual thickness of the pencil. Therefore, there is still a need for a pencil sharpener that can not only open and close the pencil inlet but also adjust the sharpening tip diameter. Summary of the Invention

[0004] The technical problem this application aims to solve is to provide a pencil sharpener that, through the active cooperation of a first adjusting member and a second adjusting member, achieves the adjustability of the size of the first pencil inlet, thereby meeting the pencil sharpening needs of various sizes of pencils, simplifying the structure, and improving the user experience.

[0005] This application provides a pencil sharpener, including a housing, a pencil sharpening mechanism installed inside the housing, and a cover rotatably mounted on the housing. The cover has a first pen inlet for inserting a pencil into the housing. A first adjusting member and a second adjusting member are movably mounted between the housing and the cover. The first adjusting member and the second adjusting member cooperate to open and close the first pen inlet and hold the pencil. Both the first adjusting member and the second adjusting member are linked to the cover. The cover rotates under force to drive the first adjusting member and the second adjusting member to move away from or towards each other. The first adjusting member and the second adjusting member move away from each other to increase the opening size of the first pen inlet, and the first adjusting member and the second adjusting member move towards each other to decrease the opening size of the first pen inlet.

[0006] In this technical solution, the housing is the main body of the pencil sharpener, and a pencil sharpening mechanism is installed inside to perform the core function of sharpening. The cover has a first pencil inlet, and the housing has a corresponding second pencil inlet. The pencil is inserted into the sharpening mechanism through the first and second pencil inlets in sequence to complete the sharpening. A first and second adjusting member are movably installed between the housing and the cover. When the first and second adjusting members are in their initial positions, the first pencil inlet is closed, ensuring that the inlet can be completely closed when not in use to prevent dust and debris from entering and extend its service life. The cover is rotatably mounted on the housing, and the cover can rotate relative to the housing under force. The cover, the first adjusting member, and the second adjusting member are all linked and cooperate with each other. Rotation of the cover drives the relative movement of the first and second adjusting members. When the first and second adjusting components move away from each other, the first pen inlet opens and the opening size gradually increases, suitable for pencils with larger diameters. When the first and second adjusting components move closer to each other, the opening size of the first pen inlet gradually decreases until it is completely closed, suitable for pencils with smaller diameters. The first and second adjusting components work together to hold the pen barrel. By adjusting the relative positions of the first and second adjusting components, the size of the first pen inlet can be changed. One pen inlet can accommodate multiple sizes of pencils, thus meeting the needs of sharpening pencils of different diameters. Compared with the traditional double-blade holder design, this adjustable pen inlet design reduces the number of blade holders, lowers material and manufacturing costs. Users can adjust the size of the first pen inlet simply by rotating the cover, making the operation simple, quick, and easy to operate with one hand.

[0007] As an improvement, the first and second adjusting members are stacked vertically. In this technical solution, the first and second adjusting members are stacked on top of each other in their initial positions, thereby completely closing the first pencil inlet. The first and second adjusting members can move relative to each other in the lateral direction. The stacked design allows the first and second adjusting members to not only completely close the first pencil inlet but also to cooperate with the pencil holder to ensure the pencil remains stable during sharpening, preventing the pencil from shaking or slipping, further improving the stability of the pencil sharpener and the user experience.

[0008] As an improvement, the first adjusting member has a first opening at the end facing the second adjusting member, and the second adjusting member has a second opening at the end facing the first adjusting member. Both the first and second openings are semi-circular, and they cooperate to allow the pencil to pass through and be inserted into the housing. In this technical solution, the first adjusting member has a first opening, and the second adjusting member has a second opening. The first and second openings cooperate to form a complete clamping opening, which better adapts to the shape of the pencil and ensures that the pencil remains stable during sharpening. When the first and second adjusting members are relatively close to their extreme positions, the first and second openings are staggered, with the first opening covered by the second adjusting member and the second opening covered by the first adjusting member, so that the first pencil inlet is completely closed. By moving the first and second adjusting members relative to each other, the distance between the first and second openings can be changed, thereby adjusting the size of the clamping opening to adapt to pencils of different diameters. The structure is ingeniously designed and more reliable in use.

[0009] As an improvement, the first adjusting member is provided with a first positioning protrusion adapted to the second opening, and the second opening and the first positioning protrusion are movably engaged to close the first pen inlet; and / or, the second adjusting member is provided with a second positioning protrusion adapted to the first opening, and the first opening and the second positioning protrusion are movably engaged to close the first pen inlet. In this technical solution, the first adjusting member is provided with a first positioning protrusion, which is used to engage the second opening to close the first pen inlet. The first positioning protrusion ensures that the first adjusting member and the second adjusting member can accurately close the first pen inlet during movement. The cooperation between the first positioning protrusion and the second opening ensures the tightness of the closure of the first pen inlet. Similarly, the second adjusting member is provided with a second positioning protrusion, which is used to engage the first opening to close the first pen inlet. The second positioning protrusion ensures that the first adjusting member and the second adjusting member can accurately close the first pen inlet during movement. The cooperation between the second positioning protrusion and the first opening ensures the tightness of the closure of the first pen inlet.

[0010] As an improvement, the first adjusting member is provided with a first guide slope adapted to the second adjusting member, and the first adjusting member and the second adjusting member are arranged in a stacked manner with relative movement close to each other through the first guide slope; and / or, the second adjusting member is provided with a second guide slope adapted to the first adjusting member, and the first adjusting member and the second adjusting member are arranged in a stacked manner with relative movement close to each other through the second guide slope. In this technical solution, a first guide slope is provided on the first adjusting member. When the first and second adjusting members move closer to each other, the first guide slope guides the two adjusting members to be stacked vertically. The design of the first guide slope allows the two adjusting members to smoothly transition to the stacked state during relative movement, avoiding jamming or unstable movement, reducing friction and wear between the adjusting members, and extending the service life of the product. Similarly, a second guide slope is provided on the second adjusting member. When the first and second adjusting members move closer to each other, the second guide slope guides the two adjusting members to be stacked vertically. The design of the second guide slope allows the two adjusting members to smoothly transition to the stacked state during relative movement, avoiding jamming or unstable movement, reducing friction and wear between the adjusting members, and extending the service life of the product.

[0011] As an improvement, the cover is rotatably snapped onto the housing. The housing has multiple third positioning protrusions, and the inner wall of the cover has positioning grooves that mate with these protrusions. These positioning grooves connect to or disengage from the third positioning protrusions by rotation. In this technical solution, the cover and housing are connected by a rotatable snap-fit, allowing the cover to be stably mounted on the housing and rotate relative to it. The installation method is simple and reliable. Multiple third positioning protrusions are provided on the housing, and positioning grooves are provided on the inner wall of the cover. By rotating the cover, the positioning grooves can connect to or disengage from different third positioning protrusions, thus achieving positioning of the cover in different positions. Through the cooperation of multiple third positioning protrusions and positioning grooves, the cover can be positioned in multiple locations to meet different usage needs and improve the overall reliability of the pencil sharpener.

[0012] As an improvement, the inner wall of the cover is provided with a guide portion, the first adjusting member is provided with a first linkage portion connected to the guide portion, and the second adjusting member is provided with a second linkage portion connected to the guide portion. The rotation of the cover drives the first adjusting member and the second adjusting member to open and close the first pen inlet through the guide portion. In this technical solution, the guide part converts the rotation of the cover into relative movement of the first and second adjusting parts, ensuring that the first and second adjusting parts can move along a predetermined trajectory when the cover rotates. The first adjusting part is provided with a first linkage part, and the connection between the first linkage part and the guide part can be a sliding connection or other forms of mechanical connection. The second adjusting part is provided with a second linkage part, and the connection between the second linkage part and the guide part can be a sliding connection or other forms of mechanical connection. When the cover rotates, the guide part, through its connection with the first and second linkage parts, drives the first and second adjusting parts to move away from or towards each other, thereby opening and closing the first pencil inlet. The design of the guide part determines the movement trajectory of the adjusting parts, ensuring that the adjusting parts can move smoothly during the rotation of the cover, avoiding jamming or unstable movement. Through the rotation of the cover, the user can achieve progressive adjustment, gradually opening or closing the pencil inlet as needed to meet the sharpening needs of different pencils.

[0013] As an improvement, the guide portion includes a first slide rail and a second slide rail. The first slide rail is slidably connected to a first linkage part, and the second slide rail is slidably connected to a second linkage part. Both the first and second slide rails are arc-shaped. In this technical solution, the guide portion is composed of a first slide rail and a second slide rail, both of which are arc-shaped. The first slide rail is slidably connected to the first linkage part on the first adjusting member, ensuring that the first adjusting member can move along a predetermined arc-shaped trajectory when the cover rotates. The second slide rail is slidably connected to the second linkage part on the second adjusting member, ensuring that the second adjusting member can move along a predetermined arc-shaped trajectory when the cover rotates. When the cover rotates, guided by the first and second slide rails, the first and second adjusting members can move closer or further apart along the arc-shaped trajectory, thereby opening and closing the first pen inlet, avoiding jamming or unstable movement, and improving the user's operating experience.

[0014] As an improvement, both the first and second slide rails are grooved structures, and both the first and second linkage parts are protruding structures; or, both the first and second slide rails are protruding structures, and both the first and second linkage parts are grooved structures. In this technical solution, the first and second slide rails can be designed as grooved structures, and the first and second linkage parts are designed as protruding structures adapted to the grooves. These protrusions are embedded in the grooves and move by sliding. Conversely, the first and second slide rails can also be designed as protruding structures, while the first and second linkage parts are designed as grooved structures, also moving by sliding. The matching structure is simple and reliable, and this sliding connection method ensures that the first and second adjusting parts can move smoothly along a predetermined trajectory when the cover rotates, avoiding jamming or unstable movement and improving the user's operating experience.

[0015] As an improvement, the housing is provided with a first mounting part and a second mounting part. The first adjusting member is slidably mounted in the first mounting part, and the second adjusting member is slidably mounted in the second mounting part. The first mounting part is provided with a third slide rail slidably connected to the first linkage part, and the second mounting part is provided with a fourth slide rail slidably connected to the second linkage part. Both the third and fourth slide rails are in a straight line shape. In this technical solution, the housing is provided with a first mounting part and a second mounting part, which are used to install the first adjusting member and the second adjusting member, respectively, ensuring the stability and controllability of the adjusting member's movement within the housing. The first mounting part is provided with a third slide rail, and the second mounting part is provided with a fourth slide rail. Both the third and fourth slide rails are in a straight line shape, making the sliding direction of the first and second adjusting members clear and stable. When the user applies force to the cover, the cover rotates. The arc-shaped first slide rail acts on the first linkage part, causing the first linkage part to slide linearly along the third slide rail. The arc-shaped second slide rail acts on the second linkage part, causing the second linkage part to slide linearly along the fourth slide rail. This allows the first adjusting member to slide away from or towards the second adjusting member. The structure is ingeniously designed and effortless to use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a pencil sharpener according to this application.

[0017] Figure 2 This is an exploded structural diagram of a pencil sharpener according to this application.

[0018] Figure 3 This is a three-dimensional structural diagram of the first and second adjusting members in this application.

[0019] Figure 4 This is a three-dimensional structural diagram of the first adjusting member from another angle in this application.

[0020] Figure 5This is a three-dimensional structural diagram of the cover body in this application.

[0021] Figure 6 This is a schematic diagram of the exploded structure of the shell in this application.

[0022] The figure shows: 1. Housing; 11. Second pen inlet; 12. Third positioning protrusion; 13. First mounting part; 131. Third slide rail; 14. Second mounting part; 141. Fourth slide rail; 2. Cover; 21. First pen inlet; 22. Positioning slot; 23. First slide rail; 24. Second slide rail; 3. First adjusting component; 31. First opening; 32. First positioning protrusion; 33. First guide slope; 34. First linkage part; 4. Second adjusting component; 41. Second opening; 42. Second positioning protrusion; 43. Second guide slope; 44. Second linkage part. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] like Figures 1 to 6 As shown, this application discloses a pencil sharpener, including a housing 1, in which a pencil sharpening mechanism is installed. The housing 1 is the main body of the pencil sharpener, and the pencil sharpening mechanism is installed inside to perform the core function of sharpening pencils. It also includes a cover 2 rotatably mounted on the housing 1. The cover 2 has a first inlet 21 for a pencil to pass through and be inserted into the housing 1. The housing 1 has a corresponding second inlet 11. The pencil passes through the first inlet 21 and the second inlet 11 in sequence and is inserted into the pencil sharpening mechanism to complete the sharpening. A first adjusting member 3 and a second adjusting member 4 are movably installed between the housing 1 and the cover 2. The first adjusting member 3 and the second adjusting member 4 cooperate to open and close the first inlet 21 and hold the pencil. When the first adjusting member 3 and the second adjusting member 4 are in the initial position, the first inlet 21 is in a closed state, ensuring that the inlet can be completely closed when not in use to prevent dust and debris from entering and extend the service life.

[0028] Both the first adjusting member 3 and the second adjusting member 4 are linked to the cover body 2. The cover body 2 rotates under force to drive the first adjusting member 3 and the second adjusting member 4 to move away from or towards each other. The relative movement of the first adjusting member 3 and the second adjusting member 4 increases the opening size of the first pen inlet 21, while the relative movement of the first adjusting member 3 and the second adjusting member 4 decreases the opening size of the first pen inlet 21. The cover body 2 is rotatably mounted on the housing 1 and can rotate relative to the housing 1 under force. The cover body 2 is configured to be linked with the first adjusting member 3 and the second adjusting member 4. Rotation of the cover body 2 drives the relative movement of the first adjusting member 3 and the second adjusting member 4. When the first adjusting member 3 and the second adjusting member 4 move away from each other, the first pen inlet 21 is opened, and the opening size gradually increases. The opening gradually increases in size, suitable for pencils with larger diameters. When the first adjusting member 3 and the second adjusting member 4 move closer to each other, the opening size of the first pen inlet 21 gradually decreases until it is completely closed, suitable for pencils with smaller diameters. The first adjusting member 3 and the second adjusting member 4 work together to hold the pen barrel. By adjusting the relative position of the first adjusting member 3 and the second adjusting member 4, the size of the first pen inlet 21 can be changed. One pen inlet can accommodate multiple sizes of pencils, thus meeting the pencil sharpening needs of different diameter pencils. Compared with the traditional double-blade holder design, this adjustable pen inlet design reduces the number of blade holders, lowers material costs and manufacturing costs. Users can adjust the size of the first pen inlet 21 simply by rotating the cover 2. The operation is simple and quick, and easy to operate with one hand.

[0029] More specifically, such as Figure 2 and Figure 3 As shown, the first adjusting member 3 and the second adjusting member 4 are stacked vertically. When the first adjusting member 3 and the second adjusting member 4 are initially positioned, they overlap each other to completely close the first pencil inlet 21. The first adjusting member 3 and the second adjusting member 4 can move relative to each other in the lateral direction. The stacked design allows the first adjusting member 3 and the second adjusting member 4 to not only completely close the first pencil inlet 21, but also to cooperate with the pencil holder to ensure that the pencil remains stable during the sharpening process, preventing the pencil from shaking or sliding, and further improving the stability of the pencil sharpener and the user experience.

[0030] More specifically, such as Figure 3As shown, the first adjusting member 3 has a first opening 31 at one end facing the second adjusting member 4, and the second adjusting member 4 has a second opening 41 at one end facing the first adjusting member 3. Both the first opening 31 and the second opening 41 are semi-circular. The first opening 31 and the second opening 41 cooperate to allow the pencil to pass through and be inserted into the housing 1. The first opening 31 is provided on the first adjusting member 3, and the second opening 41 is provided on the second adjusting member 4. The first opening 31 and the second opening 41 cooperate to form a complete clamping opening to better adapt to the shape of the pencil and ensure that the pencil remains stable during the sharpening process. When the first adjusting member 3 and the second adjusting member 4 are relatively close to the limit position, the first opening 31 and the second opening 41 are staggered. The first opening 31 is covered by the second adjusting member 4, and the second opening 41 is covered by the first adjusting member 3, so that the first pencil inlet 21 is completely closed. By moving the first adjusting member 3 and the second adjusting member 4 relative to each other, the distance between the first opening 31 and the second opening 41 can be changed, thereby adjusting the size of the clamping opening to adapt to the use of pencils of different diameters. The structure is ingeniously designed and more reliable in use.

[0031] More specifically, such as Figure 3 and Figure 4 As shown, this application can provide at least three specific mating structures for the first adjusting member 3 and the second adjusting member 4. One is as follows: the first adjusting member 3 is provided with a first positioning protrusion 32 adapted to the second opening 41. The second opening 41 and the first positioning protrusion 32 are movably engaged to close the first pen inlet 21. The first positioning protrusion 32 is used to engage the second opening 41 to close the first pen inlet 21. The first positioning protrusion 32 ensures that the first adjusting member 3 and the second adjusting member 4 can accurately close the first pen inlet 21 during movement. The mating of the first positioning protrusion 32 and the second opening 41 ensures the tightness of the closure of the first pen inlet 21. The second is... The second adjusting member 4 is provided with a second positioning protrusion 42 that is adapted to the first opening 31. The second positioning protrusion 42 is used to engage with the first opening 31 to close the first pen inlet 21. The second positioning protrusion 42 ensures that the first adjusting member 3 and the second adjusting member 4 can accurately close the first pen inlet 21 during the movement. The cooperation between the second positioning protrusion 42 and the first opening 31 ensures the tightness of the closure of the first pen inlet 21. Thirdly, the first adjusting member 3 is provided with a first positioning protrusion 32 that is adapted to the second opening 41, and the second adjusting member 4 is provided with a second positioning protrusion 42 that is adapted to the first opening 31. The principle is the same as described above and will not be repeated.

[0032] More specifically, such as Figure 3 and Figure 4As shown, this application can provide at least three specific mating structures for the first adjusting member 3 and the second adjusting member 4. One is as follows: the first adjusting member 3 is provided with a first guide slope 33 adapted to the second adjusting member 4. The first adjusting member 3 and the second adjusting member 4 are arranged in a stacked configuration by moving relatively close together via the first guide slope 33. The first guide slope 33 guides the two adjusting members to engage in a stacked configuration when they move relatively close together. The design of the first guide slope 33 allows the two adjusting members to smoothly transition to a stacked state during relative movement, avoiding jamming or uneven movement, reducing friction and wear between the adjusting members, and extending the product's service life. Another is as follows: the second adjusting member 4 is provided with a second guide slope 43 adapted to the first adjusting member 3. The first adjusting member 3 and the second adjusting member 4 are arranged in a stacked configuration by moving relatively close together via the first guide slope 33. The components 4 are arranged in a stacked manner, moving closer to each other via the second guide ramp 43. The second guide ramp 43 is provided on the second adjusting component 4. When the first adjusting component 3 and the second adjusting component 4 move closer to each other, the second guide ramp 43 guides the two adjusting components to engage in a stacked manner. The design of the second guide ramp 43 allows the two adjusting components to smoothly transition to the stacked state during relative movement, avoiding jamming or unstable movement, reducing friction and wear between the adjusting components, and extending the service life of the product. Thirdly, the first adjusting component 3 is provided with a first guide ramp 33 that matches the second adjusting component 4, and the second adjusting component 4 is provided with a second guide ramp 43 that matches the first adjusting component 3. The first adjusting component 3 and the second adjusting component 4 are arranged in a stacked manner, moving closer to each other via the first guide ramp 33 and the second guide ramp 43. The principle is the same as described above and will not be repeated.

[0033] More specifically, such as Figure 2 , Figure 5 and Figure 6 As shown, the cover 2 is rotatably snapped to the housing 1. The housing 1 has multiple third positioning protrusions 12. The inner wall of the cover 2 has positioning grooves 22 that are adapted to the third positioning protrusions 12. The positioning grooves 22 can be connected to or disengaged from the third positioning protrusions 12 by rotation. The cover 2 and the housing 1 are connected by a rotatable snap-fit. The cover 2 can be stably installed on the housing 1 and can also rotate relative to the housing 1. The installation method is simple and reliable. Multiple third positioning protrusions 12 are provided on the housing 1, and positioning grooves 22 are provided on the inner wall of the cover 2. By rotating the cover 2, the positioning grooves 22 can be connected to or disengaged from different third positioning protrusions 12, thereby realizing the positioning of the cover 2 in different positions. Through the cooperation of multiple third positioning protrusions 12 and positioning grooves 22, the cover 2 can be positioned in multiple positions to meet different usage needs and improve the overall reliability of the pencil sharpener.

[0034] More specifically, such as Figure 2 , Figure 3 and Figure 5 As shown, the inner wall of the cover 2 is provided with a guide portion. The first adjusting member 3 is provided with a first linkage portion 34 connected to the guide portion, and the second adjusting member 4 is provided with a second linkage portion 44 connected to the guide portion. The rotation of the cover 2 drives the first adjusting member 3 and the second adjusting member 4 to open and close the first pen inlet 21 through the guide portion. The function of the guide portion is to convert the rotation of the cover 2 into the relative movement of the first adjusting member 3 and the second adjusting member 4, ensuring that the first adjusting member 3 and the second adjusting member 4 can move along a predetermined trajectory when the cover 2 rotates. The first adjusting member 3 is provided with the first linkage portion 34, and the connection between the first linkage portion 34 and the guide portion can be a sliding connection or other forms of mechanical connection. The second adjusting member 4 is provided with a second linkage part 44. The connection between the second linkage part 44 and the guide part can be a sliding connection or other forms of mechanical connection. When the cover 2 rotates, the guide part drives the first adjusting member 3 and the second adjusting member 4 to move away from or towards each other through the connection with the first linkage part 34 and the second linkage part 44, thereby realizing the opening and closing of the first pencil inlet 21. The design of the guide part determines the movement trajectory of the adjusting member, ensuring that the adjusting member can move smoothly during the rotation of the cover 2, avoiding jamming or unstable movement. Through the rotation of the cover 2, the user can realize progressive adjustment, gradually opening or closing the pencil inlet as needed to meet the pencil sharpening needs of different pencils.

[0035] More specifically, such as Figure 5 As shown, the guide section includes a first slide rail 23 and a second slide rail 24. The first slide rail 23 is slidably connected to the first linkage part 34, and the second slide rail 24 is slidably connected to the second linkage part 44. Both the first slide rail 23 and the second slide rail 24 are arc-shaped. The guide section is composed of the first slide rail 23 and the second slide rail 24, both of which are arc-shaped. The first slide rail 23 is slidably connected to the first linkage part 34 on the first adjusting member 3, ensuring that the first adjusting member 3 can move along a predetermined arc-shaped trajectory when the cover 2 rotates. The second slide rail 24 is slidably connected to the second linkage part 44 on the second adjusting member 4, ensuring that the second adjusting member 4 can move along a predetermined arc-shaped trajectory when the cover 2 rotates. When the cover 2 rotates, guided by the first slide rail 23 and the second slide rail 24, the first adjusting member 3 and the second adjusting member 4 can move closer or further apart along the arc-shaped trajectory, thereby realizing the opening and closing of the first pen inlet 21, avoiding jamming or unstable movement, and improving the user's operating experience.

[0036] More specifically, such as Figure 3 and Figure 5As shown, this application can provide at least two specific mating structures for the first slide rail 23, the second slide rail 24, the first linkage part 34, and the second linkage part 44. One is that both the first slide rail 23 and the second slide rail 24 are grooved structures, and both the first linkage part 34 and the second linkage part 44 are protruding structures. The other is that both the first slide rail 23 and the second slide rail 24 are protruding structures, and both the first linkage part 34 and the second linkage part 44 are grooved structures. The first slide rail 23 and the second slide rail 24 can be designed as grooved structures, and the first linkage part 34 and the second linkage part 44 can be designed as protruding structures adapted to the grooves. These protrusions are embedded in the grooves and move by sliding. Conversely, the first slide rail 23 and the second slide rail 24 can also be designed as protruding structures, while the first linkage part 34 and the second linkage part 44 are designed as grooved structures, also moving by sliding. The mating structure is simple and reliable, and this sliding connection method ensures that the first adjusting member 3 and the second adjusting member 4 can move smoothly along a predetermined trajectory when the cover 2 rotates, avoiding jamming or unstable movement and improving the user's operating experience.

[0037] More specifically, such as Figure 6 As shown, the housing 1 is provided with a first mounting part 13 and a second mounting part 14. A first adjusting member 3 is slidably mounted in the first mounting part 13, and a second adjusting member 4 is slidably mounted in the second mounting part 14. The first mounting part 13 is provided with a third slide rail 131 slidably connected to a first linkage part 34, and the second mounting part 14 is provided with a fourth slide rail 141 slidably connected to a second linkage part 44. Both the third slide rail 131 and the fourth slide rail 141 are in a straight line shape. The housing 1 is provided with a first mounting part 13 and a second mounting part 14, which are used to mount the first adjusting member 3 and the second adjusting member 4, respectively, ensuring the stability and controllability of the adjusting members within the housing 1. Part 13 is provided with a third slide rail 131, and the second mounting part 14 is provided with a fourth slide rail 141. Both the third slide rail 131 and the fourth slide rail 141 are in a straight line shape, which makes the sliding direction of the first adjusting member 3 and the second adjusting member 4 clear and stable. The user applies force to the cover 2 to make the cover 2 rotate. The arc-shaped first slide rail 23 acts on the first linkage part 34, causing the first linkage part 34 to slide in a straight line along the third slide rail 131. The arc-shaped second slide rail 24 acts on the second linkage part 44, causing the second linkage part 44 to slide in a straight line along the fourth slide rail 141. Thus, the first adjusting member 3 slides away from or closer to the second adjusting member 4. The structure is ingeniously designed and easy to use.

[0038] 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 pencil sharpening mechanism is installed within the housing (1), characterized in that, It also includes a cover (2) that is rotatably mounted on the housing (1). The cover (2) is provided with a first pen inlet (21) for inserting a pen into the housing (1). A first adjusting member (3) and a second adjusting member (4) are movably installed between the housing (1) and the cover (2). The first adjusting member (3) and the second adjusting member (4) cooperate to open and close the first pen inlet (21) and hold the pen. The first adjusting member (3) and the second adjusting member (4) are linked with the cover (2). The cover (2) is rotated under force to drive the first adjusting member (3) and the second adjusting member (4) to move away from or closer to each other. The first adjusting member (3) and the second adjusting member (4) move away from each other to increase the opening size of the first pen inlet (21). The first adjusting member (3) and the second adjusting member (4) move closer to each other to reduce the opening size of the first pen inlet (21).

2. A pencil sharpener according to claim 1, characterized in that, The first adjusting member (3) and the second adjusting member (4) are stacked vertically.

3. A pencil sharpener according to claim 2, characterized in that, The first adjusting member (3) has a first opening (31) at one end facing the second adjusting member (4), and the second adjusting member (4) has a second opening (41) at one end facing the first adjusting member (3). The first opening (31) and the second opening (41) are both semi-circular. The first opening (31) and the second opening (41) cooperate to allow the pen to be inserted into the housing (1).

4. A pencil sharpener according to claim 3, characterized in that, The first adjusting member (3) is provided with a first positioning protrusion (32) adapted to the second opening (41), and the second opening (41) and the first positioning protrusion (32) are movably engaged to close the first pen inlet (21); and / or, the second adjusting member (4) is provided with a second positioning protrusion (42) adapted to the first opening (31), and the first opening (31) and the second positioning protrusion (42) are movably engaged to close the first pen inlet (21).

5. A pencil sharpener according to claim 2, characterized in that, The first adjusting member (3) is provided with a first guide slope (33) adapted to the second adjusting member (4), and the first adjusting member (3) and the second adjusting member (4) are arranged in a stacked manner with relative movement close to each other through the first guide slope (33); and / or, the second adjusting member (4) is provided with a second guide slope (43) adapted to the first adjusting member (3), and the first adjusting member (3) and the second adjusting member (4) are arranged in a stacked manner with relative movement close to each other through the second guide slope (43).

6. A pencil sharpener according to claim 1, characterized in that, The cover (2) is rotatably snapped to the shell (1). The shell (1) is provided with a plurality of third positioning protrusions (12). The inner wall of the cover (2) is provided with positioning grooves (22) that are adapted to the third positioning protrusions (12). The positioning grooves (22) are connected to or disconnected from the third positioning protrusions (12) by rotation.

7. A pencil sharpener according to claim 1, characterized in that, The inner wall of the cover (2) is provided with a guide part, the first adjusting member (3) is provided with a first linkage part (34) connected to the guide part, and the second adjusting member (4) is provided with a second linkage part (44) connected to the guide part. The cover (2) rotates and drives the first adjusting member (3) and the second adjusting member (4) to open and close the first pen inlet (21) through the guide part.

8. A pencil sharpener according to claim 7, characterized in that, The guide section includes a first slide rail (23) and a second slide rail (24). The first slide rail (23) is slidably connected to the first linkage part (34), and the second slide rail (24) is slidably connected to the second linkage part (44). Both the first slide rail (23) and the second slide rail (24) are arc-shaped.

9. A pencil sharpener according to claim 7, characterized in that, The first slide rail (23) and the second slide rail (24) are both groove structures, and the first linkage part (34) and the second linkage part (44) are both protruding structures; or, the first slide rail (23) and the second slide rail (24) are both protruding structures, and the first linkage part (34) and the second linkage part (44) are both groove structures.

10. A pencil sharpener according to claim 7, characterized in that, The housing (1) is provided with a first mounting part (13) and a second mounting part (14). The first adjusting member (3) is slidably installed in the first mounting part (13), and the second adjusting member (4) is slidably installed in the second mounting part (14). The first mounting part (13) is provided with a third slide rail (131) slidably connected to the first linkage part (34), and the second mounting part (14) is provided with a fourth slide rail (141) slidably connected to the second linkage part (44). The third slide rail (131) and the fourth slide rail (141) are both in the shape of a straight line.

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