Electric pencil sharpener

Abstract

The application discloses a kind of electric pencil sharpener, including first shell, the first shell is equipped with pencil sharpener mechanism and battery assembly in, also including second shell and battery mounting cover, the bottom of the first shell is equipped with the battery compartment for installing battery assembly, the electrode piece of the battery mounting cover is equipped with the adaptation of battery assembly, the battery mounting cover is connected with the first shell to open and close battery compartment, the second shell is sleeved battery mounting cover and with the bottom of first shell can be detachably connected, so that battery mounting cover is connected or separated from battery compartment, by additionally providing battery mounting cover, so that battery assembly can be correctly aligned when installing, avoid positive and negative reverse, prevent spring from twisting and deforming in the process of installation, by the second shell of battery mounting cover, the sealing property of battery compartment and the stability of overall structure are enhanced.

Description

Technical Field

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

[0002] Traditional manual pencil sharpeners, while inexpensive, suffer from drawbacks such as strenuous operation, inconsistent sharpening results, and a tendency to break pencils. To overcome these shortcomings, electric pencil sharpeners were developed. Electric pencil sharpeners use a motor to drive the blades, offering advantages such as fast sharpening speed, good sharpening effect, and ease of operation. However, traditional electric pencil sharpeners typically have internal batteries secured with screws. Replacing the battery when it's depleted or malfunctioning is complex, requiring disassembly of the entire sharpener casing and potentially other components like the motor. This complexity increases the difficulty and cost of repair, making it difficult for users to perform themselves and increasing the risk of damaging the battery casing or internal parts during disassembly. Some sharpeners use a snap-on battery cover, which is not airtight, allowing dust and debris to enter the battery compartment, affecting battery life and performance, and potentially causing short circuits and other safety hazards. Furthermore, snap-on battery covers have poor overall integrity. Some pencil sharpeners use a rotating clip to secure the battery cover to the battery compartment. However, rotating the cover can easily reverse the positive and negative terminals of the battery, causing the sharpener to malfunction or even damaging the circuitry. Furthermore, rotating the cover can cause the spring to twist and deform, affecting the battery's contact stability and leading to poor battery-circuit connection, resulting in problems such as poor contact and power outages. Therefore, there is still a need for an electric pencil sharpener that can ensure the correct installation of the battery cover while maintaining a sealed battery compartment. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide an electric pencil sharpener that, by adding a battery mounting cover, enables the battery assembly to be correctly aligned during installation, avoids reversed positive and negative terminals, prevents the spring from twisting and deforming during installation, and enhances the sealing of the battery compartment and the stability of the overall structure by fitting a second housing on the battery mounting cover.

[0004] This application provides an electric pencil sharpener, including a first housing, in which a pencil sharpening mechanism and a battery assembly are installed. It also includes a second housing and a battery mounting cover. The bottom of the first housing has a battery compartment for mounting the battery assembly. The battery mounting cover has electrode plates adapted to the battery assembly. The battery mounting cover is connected to the first housing to open and close the battery compartment. The second housing is fitted onto the battery mounting cover and is detachably connected to the bottom of the first housing, allowing the battery mounting cover to be connected to or detached from the battery compartment.

[0005] In this technical solution, the first and second housings are connected to form the outer shell of the pencil sharpener. The first housing houses the sharpening mechanism and battery assembly, serving to protect and secure the internal components. The battery mounting cover is used to open and close the battery compartment, protecting the battery assembly and facilitating battery replacement. Electrode plates are provided on the battery mounting cover. The position and shape of the electrode plates ensure that the battery assembly is correctly aligned during installation, preventing reverse polarity and preventing the spring from being twisted or deformed by external forces during installation. The battery mounting cover is designed to fit inside the second housing. This fitted connection not only increases the stability of the battery mounting cover but also enhances the sealing of the battery compartment through a multi-layered structure. The second housing and the first housing are connected by a detachable method, such as snaps, threads, or magnetic attraction, facilitating user disassembly and installation. The battery mounting cover and the second housing work together to form a multi-layered sealing system, effectively preventing dust and moisture from entering the battery compartment, extending the battery assembly's lifespan, improving sealing, and enhancing the overall structural stability, making the battery compartment more robust. The detachable connection between the second housing and the first housing allows users to easily open the battery compartment to replace the battery while ensuring the battery compartment's sealing and safety.

[0006] As an improvement, the battery mounting cover is provided with a first connecting part, and the bottom of the first housing is provided with a first limiting part adapted to the first connecting part. The first connecting part is connected to the first limiting part to limit the rotation of the battery mounting cover. In this technical solution, a first connecting part is provided on the battery mounting cover. The first connecting part includes, but is not limited to, protrusions, slots, or other forms of mechanical structures. A first limiting part is provided on the first housing. The first limiting part includes, but is not limited to, protrusions, slots, or other forms of mechanical structures. The first connecting part and the first limiting part cooperate to limit the rotation of the battery mounting cover. The shape and size of the first connecting part and the first limiting part are adapted to each other to ensure accurate alignment and limit function during installation. By limiting the rotation of the battery mounting cover, the correct alignment of the electrode plates and the battery assembly is ensured, avoiding reversed positive and negative terminals due to improper installation. It also prevents problems such as spring torsion and deformation caused by the rotation of the battery mounting cover, making the battery assembly and the electrode plates in stable contact, further improving the correctness of battery installation. On the other hand, the first connecting part and the first limiting part cooperate to have the function of installation positioning. Their shape and size are adapted to each other to ensure that the electrode plates can be accurately aligned with the positive and negative terminals of the battery assembly during installation. This not only improves the accuracy of installation but also simplifies the installation process and improves installation efficiency and reliability.

[0007] As an improvement, the inner wall of the second housing is provided with a second limiting part that is adapted to the first connecting part. After the second housing is sleeved with the battery mounting cover, the first connecting part is connected to or disengaged from the second limiting part by rotation. The connection between the first connecting part and the second limiting part ensures that the battery mounting cover is confined within the second housing. In this technical solution, the battery mounting cover is fitted inside the second housing. A second limiting part is added inside the second housing. The second limiting part cooperates with the first connecting part to limit the installation of the battery mounting cover. By rotating the battery mounting cover or the second housing, the first connecting part and the second limiting part can be connected or disconnected. When the first connecting part and the second limiting part are connected, the battery mounting cover is confined within the second housing, preventing it from loosening or falling off, further enhancing the stability of the battery mounting cover. The battery mounting cover and the second housing are connected and disconnected by sleeve and rotation. The operation is simple and intuitive, and installation and disassembly can be completed without complicated tools and operating steps. The battery mounting cover is connected to the first housing through the second housing. The first connecting part is connected to the first limiting part so that the battery mounting cover cannot rotate relative to the first housing. The connection and locking between the second housing and the first housing does not affect the position of the battery mounting cover, ensuring the correct alignment of the electrode plate and the battery assembly, and improving the installation reliability.

[0008] As an improvement, the first limiting part is provided with a locking position adapted to the second limiting part. The second limiting part is connected to or disengaged from the locking position by rotation. When the second housing is connected to the first housing, the first connecting part is connected to the first limiting part to limit the rotation of the battery mounting cover. The second housing rotates to disengage the second limiting part from the first connecting part and connect with the locking position to lock the connection between the second housing and the first housing. In this technical solution, the first limiting part is provided with a locking position for rotating connection or disengagement with the second limiting part. The locking position connects with the second limiting part to lock the second housing and the first housing, preventing the first housing and the second housing from disengaging during use. The second housing can rotate to disengage the second limiting part from the first connecting part and connect with the locking position, thus locking the connection between the second housing and the first housing. The second housing can rotate in the opposite direction to disengage the second limiting part from the locking position and connect with the first connecting part, thus unlocking the connection between the second housing and the first housing. This application provides a specific installation and disassembly process. Installation process: The second housing is fitted over the battery mounting cover. By rotating the second housing and the battery mounting cover relative to each other, the first connecting part connects with the second limiting part, thereby confining the battery mounting cover inside the second housing. Then, the second housing connects to the first housing, causing the battery mounting cover to close the battery compartment. At this time, the first connecting part... The second housing is connected to the first limiting part, preventing the battery mounting cover from rotating relative to the first housing. Rotating the second housing allows the second limiting part to disengage from the first connecting part and connect with the locking position, thus locking the second housing to the first housing. Disassembly: Rotating the second housing disengages the second limiting part from the locking position and connects it with the first connecting part, unlocking the connection between the second and first housings. The second housing can then be removed, allowing the battery mounting cover to be removed simultaneously. Rotating the second housing causes the second limiting part to switch between connecting and limiting parts. Users can easily connect and disconnect the battery mounting cover by rotating the second housing. The operation is simple and intuitive, requiring no complex tools or procedures, further improving the accuracy and efficiency of battery installation. This design allows users to replace battery components more easily, reducing problems caused by improper installation and improving product reliability and lifespan.

[0009] As an improvement, the first limiting part is provided with a first opening adapted to the first connecting part. The second limiting part passes through the first opening to connect with the first limiting part. The first connecting part engages with the first opening to limit the rotation of the battery mounting cover and confine the second limiting part within the first limiting part. In this technical solution, the first limiting part is used to connect the first connecting part and the second limiting part. A first opening is provided on the first limiting part. The shape and size of the first opening match the first connecting part to ensure that the two can be accurately aligned and achieve the limiting function. The first opening allows the second limiting part to pass through, ensuring that the second limiting part can smoothly pass through the first opening and enter the first limiting part. When the first connecting part engages with the first opening, the first opening is in a closed state, forming a closed first limiting part. The second limiting part cannot detach from the first opening within the first limiting part. The second limiting part can switch between connecting the first connecting part and the locking position by rotation, ensuring a stable connection between the battery mounting cover and the first housing, and between the first housing and the second housing. This further limits the position of the battery mounting cover, preventing the three from loosening or falling off during use and improving the overall structural stability.

[0010] As an improvement, the first connecting part is trapezoidal in shape, and / or the first opening is inverted trapezoidal in shape. In this technical solution, the first connecting part and the first opening have at least three specific structural designs: First, only the first connecting part is trapezoidal, with two parallel base edges and two non-parallel side edges. The trapezoidal first connecting part is easier to insert into the first opening, providing a more stable connection. Second, only the first opening is inverted trapezoidal, i.e., the first opening is wider at the top and narrower at the bottom, making it easier for the first connecting part to insert into the first opening, providing a more stable connection. Third, the first connecting part is trapezoidal, and the first opening is inverted trapezoidal, making it easier for the first connecting part and the first opening to align and engage more tightly, further enhancing the stability of the connection.

[0011] As an improvement, the first connecting portion is provided with a first protrusion, and the second limiting portion is provided with a first recess adapted to the first protrusion. The first protrusion and the first recess are connected or disengaged by rotation. The connection between the first protrusion and the first recess ensures that the battery mounting cover is confined within the second housing. In this technical solution, corresponding first protrusions and first recesses are respectively provided on the first connecting portion and the second limiting portion. The shapes and sizes of the first protrusions and first recesses are adapted to each other. The connection between the first protrusion and the first recess achieves the limiting function of the battery mounting cover, preventing the battery mounting cover from detaching from the second housing during assembly, enabling precise docking between the battery mounting cover and the battery compartment, and improving installation reliability.

[0012] As an improvement, the second limiting part is provided with a second protrusion, and the locking position is provided with a second recess adapted to the second protrusion. The second protrusion and the second recess are connected or disengaged by rotation. The connection of the second protrusion and the second recess locks the second housing with the first housing. In this technical solution, corresponding second protrusions and second recesses are provided on the second limiting part and the locking position, respectively. The shapes and sizes of the second protrusion and the second recess are adapted to each other. The connection of the second protrusion and the second recess realizes the connection and locking function between the second housing and the first housing, preventing the second housing from loosening or falling off during use. Through the cooperation of the second protrusion and the second recess, the connection between the second housing and the first housing is more secure, improving the stability of the overall structure.

[0013] As an improvement, the outer diameter of the battery mounting cover is adapted to the inner diameter of the second housing, and the battery mounting cover is provided with a second opening for the second limiting part to pass through. In this technical solution, the outer diameter of the battery mounting cover is designed to be adapted to the inner diameter of the second housing, ensuring that the two can fit together tightly, so that the battery mounting cover can be stably installed in the second housing, improving the reliability of the overall structure. The second limiting part is provided on the inner wall of the second housing, and the second limiting part is a protruding structure used to abut against the first connecting part. By providing a second opening on the battery mounting cover, the second limiting part can pass through the second opening during the fitting process of the battery mounting cover and the second housing, avoiding interference with the installation of the battery mounting cover, and making the fitting of the battery mounting cover and the second housing tighter and more reliable.

[0014] As an improvement, the battery mounting cover is provided with a receiving groove adapted to the electrode sheet. The electrode sheet is installed in the receiving groove and is limited by fasteners. In this technical solution, by providing a receiving groove on the battery mounting cover, the receiving groove is used to install the electrode sheet. The shape and size of the receiving groove are designed to fit the electrode sheet, ensuring that the electrode sheet can be stably installed on the battery mounting cover. This allows the electrode sheet to be correctly aligned with the battery assembly during installation. The electrode sheet is fixed in the receiving groove by fasteners, which can be screws, clips, or other mechanical fixing devices, ensuring that the electrode sheet will not loosen in the receiving groove, providing stable electrical contact, and reducing contact problems caused by vibration or external force. Attached Figure Description

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

[0016] Figure 2 This is an exploded structural diagram of an electric pencil sharpener according to this application.

[0017] Figure 3 This is a schematic diagram of the connection structure between the battery mounting cover and the electrode sheet in this application.

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

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

[0020] Figure 6 This is a schematic diagram of the connection structure between the battery mounting cover and the second housing in this application.

[0021] Figure 7 This is a cross-sectional structural diagram of part of the first housing, battery mounting cover and second housing in this application.

[0022] Figure 8 For this application Figure 7 A magnified view of a portion of point A in the middle.

[0023] The figure shows: 1. First housing; 11. Battery compartment; 12. First limiting part; 121. First opening; 13. Locking position; 131. Second recess; 2. Second housing; 21. Second limiting part; 211. First recess; 212. Second protrusion; 3. Battery mounting cover; 31. First connecting part; 311. First protrusion; 312. Second opening; 32. Receiving groove; 4. Battery assembly; 5. Electrode plate; 51. Spring. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] like Figures 1 to 8 As shown, this application discloses an electric pencil sharpener, including a first housing 1, in which a sharpening mechanism and a battery assembly 4 are installed. It also includes a second housing 2 and a battery mounting cover 3. The bottom of the first housing 1 has a battery compartment 11 for installing the battery assembly 4. The battery mounting cover 3 has electrode plates 5 adapted to the battery assembly 4. The battery mounting cover 3 is connected to the first housing 1 to open and close the battery compartment 11. The second housing 2 is fitted onto the battery mounting cover 3 and is detachably connected to the bottom of the first housing 1, allowing the battery mounting cover 3 to connect or detach from the battery compartment 11. The first housing 1 and the second housing 2 are connected to form the outer shell of the pencil sharpener. The first housing 1 houses the sharpening mechanism and the battery assembly 4, serving to protect and secure the internal components. The battery mounting cover 3 is used to open and close the battery compartment 11, serving to protect the battery assembly 4 and facilitate battery replacement. The battery mounting cover 3 has electrode plates 5, the position and shape of which are designed to ensure… The battery assembly 4 is correctly aligned during installation to avoid reversed positive and negative terminals and to prevent the spring 51 from being twisted or deformed by external force during installation. The battery mounting cover 3 is designed to fit inside the second housing 2. This fitted connection not only increases the stability of the battery mounting cover 3 but also enhances the sealing of the battery compartment 11 through a multi-layer structure. The second housing 2 and the first housing 1 are connected by a detachable method, such as a snap, thread, or magnetic attraction, to facilitate user disassembly and installation. The battery mounting cover 3 and the second housing 2 work together to form a multi-layer sealing system, effectively preventing dust and moisture from entering the battery compartment 11 and extending the service life of the battery assembly 4. This not only improves the sealing performance but also enhances the overall structural stability, making the battery compartment 11 more robust. The detachable connection between the second housing 2 and the first housing 1 allows users to easily open the battery compartment 11 to replace the battery while ensuring the sealing and safety of the battery compartment 11.

[0029] More specifically, such as Figures 2 to 4 , Figure 8 As shown, the battery mounting cover 3 is provided with a first connecting part 31, and the bottom of the first housing 1 is provided with a first limiting part 12 adapted to the first connecting part 31. The first connecting part 31 and the first limiting part 12 are connected to limit the rotation of the battery mounting cover 3. The first connecting part 31 is provided on the battery mounting cover 3, and the first connecting part 31 includes, but is not limited to, protrusions, slots or other forms of mechanical structures. The first limiting part 12 is provided on the first housing 1, and the first limiting part 12 includes, but is not limited to, protrusions, slots or other forms of mechanical structures. The first connecting part 31 and the first limiting part 12 cooperate to limit the rotation of the battery mounting cover 3. The shape and size of the first connecting part 31 and the first limiting part 12 are adapted to each other to ensure rotation. During installation, the first connecting part 31 and the first limiting part 12 work together to provide a positioning function. Their shapes and sizes are compatible, ensuring that the electrode piece 5 can be accurately aligned with the positive and negative terminals of the battery assembly 4 during installation. This not only improves the accuracy of installation but also limits the rotation of the battery mounting cover 3, ensuring that the electrode piece 5 can be accurately aligned with the positive and negative terminals of the battery assembly 4. This not only improves the accuracy of installation but also simplifies the installation process and increases installation efficiency and reliability.

[0030] More specifically, such as Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, the inner wall of the second housing 2 is provided with a second limiting part 21 adapted to the first connecting part 31. After the second housing 2 is sleeved with the battery mounting cover 3, rotation causes the first connecting part 31 to connect or disconnect from the second limiting part 21. The first connecting part 31 and the second limiting part 21 are connected to limit the battery mounting cover 3 within the second housing 2. The battery mounting cover 3 is fitted into the second housing 2. By adding a second limiting part 21 inside the second housing 2, the second limiting part 21 is used to cooperate with the first connecting part 31 to achieve the installation limiting of the battery mounting cover 3. By rotating the battery mounting cover 3 or the second housing 2, the first connecting part 31 is connected or disconnected from the second limiting part 21. When the first connecting part 31 and the second limiting part 21 are sleeved together, the battery mounting cover 3 is positioned within the second housing 2. When the limiting part 21 is connected, the battery mounting cover 3 is confined within the second housing 2 to prevent it from loosening or falling off, further enhancing the stability of the battery mounting cover 3. The battery mounting cover 3 and the second housing 2 are connected and disconnected by sleeve and rotation, which is simple and intuitive to operate. Installation and disassembly can be completed without complicated tools and operating steps. The battery mounting cover 3 is connected to the first housing 1 through the second housing 2. The first connecting part 31 is connected to the first limiting part 12 so that the battery mounting cover 3 cannot rotate relative to the first housing 1. The connection and locking between the second housing 2 and the first housing 1 will not affect the position of the battery mounting cover 3, ensuring the correct alignment of the electrode plate 5 and the battery assembly 4, and improving the installation reliability.

[0031] More specifically, such as Figure 4 and Figure 8 As shown, the first limiting part 12 is provided with a locking position 13 adapted to the second limiting part 21. The second limiting part 21 connects or disengages from the locking position 13 by rotation. When the second housing 2 is connected to the first housing 1, the first connecting part 31 connects to the first limiting part 12 to limit the rotation of the battery mounting cover 3. The second housing 2 rotates to disengage the second limiting part 21 from the first connecting part 31 and connect with the locking position 13, thereby locking the second housing 2 to the first housing 1. The first limiting part 12 is provided with the locking position 13 for rotating with the second limiting part 21. The second housing 2 is locked to the first housing 1 by connecting or disconnecting the locking position 13 and the second limiting part 21, preventing the first housing 1 and the second housing 2 from separating from each other in use. The second housing 2 can be rotated to disengage the second limiting part 21 from the first connecting part 31 and connect it to the locking position 13, thereby achieving the connection and locking of the second housing 2 and the first housing 1. The second housing 2 can be rotated in the opposite direction to disengage the second limiting part 21 from the locking position 13 and connect it to the first connecting part 31, thereby achieving the connection and unlocking of the second housing 2 and the first housing 1.

[0032] More specifically, this application provides a specific installation and disassembly process. Installation process: The second housing 2 is fitted over the battery mounting cover 3. By rotating the second housing 2 and the battery mounting cover 3 relative to each other, the first connecting part 31 connects with the second limiting part 21, thereby confining the battery mounting cover 3 within the second housing 2. Then, the second housing 2 connects to the first housing 1, causing the battery mounting cover 3 to close the battery compartment 11. At this time, the first connecting part 31 connects with the first limiting part 12, preventing the battery mounting cover 3 from rotating relative to the first housing 1. By rotating the second housing 2, the second limiting part 21 can disengage from the first connecting part 31 and connect with the locking part 13, thereby achieving a locked connection between the second housing 2 and the first housing 1. Disassembly process: By… Rotating the second housing 2 causes the second limiting part 21 to disengage from the locking position 13 and connect with the first connecting part 31, thereby unlocking the connection between the second housing 2 and the first housing 1. At this time, the second housing 2 can be removed, and the battery mounting cover 3 can be removed at the same time. By rotating the second housing 2, the second limiting part 21 switches between connecting the first connecting part 31 and the first limiting part 12. The user can connect and remove the battery mounting cover 3 by rotating the second housing 2. The operation is simple and intuitive, and the user does not need complicated tools and operating steps, which further improves the correctness and efficiency of battery installation. Through this design, the user can replace the battery assembly 4 more easily, while reducing problems caused by improper installation and improving the reliability and service life of the product.

[0033] More specifically, such as Figure 4 and Figure 8 As shown, the first limiting part 12 has a first opening 121 adapted to the first connecting part 31. The second limiting part 21 passes through the first opening 121 to connect with the first limiting part 12. The first connecting part 31 engages with the first opening 121 to limit the rotation of the battery mounting cover 3 and confine the second limiting part 21 within the first limiting part 12. The first limiting part 12 is used to connect the first connecting part 31 and the second limiting part 21. The first opening 121 is provided on the first limiting part 12. The shape and size of the first opening 121 match the first connecting part 31 to ensure that the two can be accurately aligned and achieve the limiting function. The first opening 121 also allows the second limiting part 21 to pass through. This ensures that the second limiting part 21 can smoothly pass through the first opening 121 and enter the first limiting part 12. When the first connecting part 31 engages with the first opening 121, the first opening 121 is in a closed state, forming a closed first limiting part 12. The second limiting part 21 cannot disengage through the first opening 121 within the first limiting part 12. The second limiting part 21 can switch the connection between the first connecting part 31 and the locking part 13 by rotation, ensuring a stable connection between the battery mounting cover 3 and the first housing 1, and between the first housing 1 and the second housing 2. This further limits the position of the battery mounting cover 3, preventing the three from loosening or falling off during use, and improving the stability of the overall structure.

[0034] More specifically, such as Figure 3 , Figure 4 and Figure 8 As shown, the first connecting part 31 has a trapezoidal structure, and / or the first opening 121 has an inverted trapezoidal structure. The first connecting part 31 and the first opening 121 have at least three specific structural designs. One is: only the first connecting part 31 has a trapezoidal structure, with two parallel bottom edges and two non-parallel side edges. The trapezoidal structure of the first connecting part 31 makes it easier to insert into the first opening 121, providing a more stable connection. The second is: only the first opening 121 has an inverted trapezoidal structure, that is, the first opening 121 has a shape that is wider at the top and narrower at the bottom, so that the first connecting part 31 makes it easier to insert into the first opening 121, providing a more stable connection. The third is: the first connecting part 31 has a trapezoidal structure, and the first opening 121 has an inverted trapezoidal structure. The first connecting part 31 and the first opening 121 are easier to align and can be more tightly joined, further enhancing the stability of the connection.

[0035] More specifically, such as Figure 3 , Figure 5 and Figure 6 As shown, the first connecting part 31 is provided with a first protrusion 311, and the second limiting part 21 is provided with a first recess 211 that matches the first protrusion 311. The first protrusion 311 and the first recess 211 are connected or disconnected by rotation. The connection between the first protrusion 311 and the first recess 211 allows the battery mounting cover 3 to be confined within the second housing 2. Corresponding first protrusions 311 and first recesses 211 are respectively provided on the first connecting part 31 and the second limiting part 21. The shapes and sizes of the first protrusions 311 and the first recesses 211 are matched. The connection between the first protrusion 311 and the first recess 211 realizes the limiting function of the battery mounting cover 3, preventing the battery mounting cover 3 from detaching from the second housing 2 during assembly, so that the battery mounting cover 3 can be accurately docked with the battery compartment 11, improving the installation reliability.

[0036] More specifically, such as Figure 5 and Figure 8As shown, a second protrusion 212 is provided on the second limiting part 21, and a second recess 131 adapted to the second protrusion 212 is provided on the locking part 13. The second protrusion 212 and the second recess 131 are connected or disengaged by rotation. The connection between the second protrusion 212 and the second recess 131 enables the second housing 2 to be connected and locked to the first housing 1. Corresponding second protrusions 212 and second recesses 131 are provided on the second limiting part 21 and the locking part 13, respectively. The shapes and sizes of the second protrusions 212 and the second recesses 131 are adapted to each other. The connection between the second protrusion 212 and the second recess 131 enables the connection and locking function between the second housing 2 and the first housing 1, preventing the second housing 2 from loosening or falling off during use. Through the cooperation of the second protrusion 212 and the second recess 131, the connection between the second housing 2 and the first housing 1 is more secure, improving the stability of the overall structure.

[0037] More specifically, such as Figure 3 , Figure 5 and Figure 6 As shown, the outer diameter of the battery mounting cover 3 is adapted to the inner diameter of the second housing 2. The battery mounting cover 3 is provided with a second opening 312 for the second limiting part 21 to pass through. The design of the outer diameter of the battery mounting cover 3 to be adapted to the inner diameter of the second housing 2 ensures that the two can be tightly fitted together, so that the battery mounting cover 3 can be stably installed in the second housing 2, improving the reliability of the overall structure. The second limiting part 21 is provided on the inner wall of the second housing 2. The second limiting part 21 is a protruding structure used to abut against the first connecting part 31. By providing a second opening 312 on the battery mounting cover 3, the second limiting part 21 can pass through the second opening 312 during the process of fitting the battery mounting cover 3 and the second housing 2, avoiding interference with the installation of the battery mounting cover 3, and making the fitting of the battery mounting cover 3 and the second housing 2 tighter and more reliable.

[0038] More specifically, such as Figure 2 and Figure 3 As shown, the battery mounting cover 3 has a receiving groove 32 adapted to the electrode plate 5. The electrode plate 5 is installed in the receiving groove 32 and is limited by fasteners. By setting the receiving groove 32 on the battery mounting cover 3, the receiving groove 32 is used to install the electrode plate 5. The shape and size of the receiving groove 32 are designed to fit the electrode plate 5, ensuring that the electrode plate 5 can be stably installed on the battery mounting cover 3. This allows the electrode plate 5 to be correctly aligned with the battery assembly 4 during installation. The electrode plate 5 is fixed in the receiving groove 32 by fasteners, which can be screws, clips, or other mechanical fixing devices, ensuring that the electrode plate 5 will not loosen in the receiving groove 32, providing stable electrical contact, and reducing contact problems caused by vibration or external force.

[0039] This application is not limited to the above-described preferred embodiments. Anyone can derive other products in various forms under the guidance of this application. However, regardless of any changes made to their shape or structure, any technical solution that is the same as or similar to that of this application falls within the protection scope of this application.

Claims

1. An electric pencil sharpener, comprising a first housing (1), wherein a pencil sharpening mechanism and a battery assembly (4) are installed within the first housing (1), characterized in that, It also includes a second housing (2) and a battery mounting cover (3). The bottom of the first housing (1) is provided with a battery compartment (11) for installing the battery assembly (4). The battery mounting cover (3) is provided with an electrode plate (5) adapted to the battery assembly (4). The battery mounting cover (3) is connected to the first housing (1) to open and close the battery compartment (11). The second housing (2) is fitted with the battery mounting cover (3) and is detachably connected to the bottom of the first housing (1) so that the battery mounting cover (3) can be connected to or disconnected from the battery compartment (11).

2. The electric pencil sharpener according to claim 1, characterized in that, The battery mounting cover (3) is provided with a first connecting part (31), and the bottom of the first housing (1) is provided with a first limiting part (12) adapted to the first connecting part (31). The first connecting part (31) is connected to the first limiting part (12) so that the battery mounting cover (3) can be rotated and limited.

3. An electric pencil sharpener according to claim 2, characterized in that, The inner wall of the second housing (2) is provided with a second limiting part (21) that is adapted to the first connecting part (31). After the second housing (2) is sleeved with the battery mounting cover (3), the first connecting part (31) and the second limiting part (21) are connected or disconnected by rotation. The first connecting part (31) and the second limiting part (21) are connected so that the battery mounting cover (3) is limited to the second housing (2).

4. An electric pencil sharpener according to claim 3, characterized in that, The first limiting part (12) is provided with a locking position (13) adapted to the second limiting part (21). The second limiting part (21) is connected to or disconnected from the locking position (13) by rotation. When the second housing (2) is connected to the first housing (1), the first connecting part (31) is connected to the first limiting part (12) to limit the rotation of the battery mounting cover (3). The second housing (2) rotates to disengage the second limiting part (21) from the first connecting part (31) and connect with the locking position (13) to lock the connection between the second housing (2) and the first housing (1).

5. An electric pencil sharpener according to claim 3, characterized in that, The first limiting part (12) is provided with a first opening (121) adapted to the first connecting part (31). The second limiting part (21) passes through the first opening (121) to connect with the first limiting part (12). The first connecting part (31) engages with the first opening (121) to limit the rotation of the battery mounting cover (3) and limit the second limiting part (21) within the first limiting part (12).

6. An electric pencil sharpener according to claim 5, characterized in that, The first connecting part (31) has a trapezoidal structure, and / or the first opening (121) has an inverted trapezoidal structure.

7. An electric pencil sharpener according to claim 3, characterized in that, The first connecting part (31) is provided with a first protrusion (311), and the second limiting part (21) is provided with a first recess (211) adapted to the first protrusion (311). The first protrusion (311) and the first recess (211) are connected or disconnected by rotation. The first protrusion (311) and the first recess (211) are connected so that the battery mounting cover (3) is limited to the second housing (2).

8. An electric pencil sharpener according to claim 4, characterized in that, The second limiting part (21) is provided with a second protrusion (212), and the locking part (13) is provided with a second recess (131) that is adapted to the second protrusion (212). The second protrusion (212) and the second recess (131) are connected or disconnected by rotation. The second protrusion (212) and the second recess (131) are connected to lock the second housing (2) and the first housing (1).

9. An electric pencil sharpener according to claim 3, characterized in that, The outer diameter of the battery mounting cover (3) is adapted to the inner diameter of the second housing (2), and the battery mounting cover (3) is provided with a second opening (312) for the second limiting part (21) to pass through.

10. An electric pencil sharpener according to claim 1, characterized in that, The battery mounting cover (3) is provided with a receiving groove (32) adapted to the electrode sheet (5), and the electrode sheet (5) is installed in the receiving groove (32) and limited by fasteners.

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