Electric pencil sharpener

Abstract

The application discloses a kind of electric pencil sharpener, including shell, the cutter holder assembly and motor are installed in the shell, transmission assembly is equipped between the cutter holder assembly and motor, the cutter holder assembly is rotated by transmission assembly that the motor drives, the output end of the motor is equipped with first gear, the cutter holder assembly is equipped with second gear, the transmission assembly includes transmission connection first gear set and second gear set, the first gear set is engaged with first gear, the second gear set is engaged with second gear, the first gear and second gear are up and down distribution, the first gear set and second gear set are coaxial distribution, by optimizing the layout and structure of transmission assembly, realize small, light weight, transmission efficient, reliable performance and so on Advantage, can satisfy the portable demand of user.

Description

Technical Field

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

[0002] An electric pencil sharpener is a tool that uses a motor to drive a blade to sharpen pencils. It solves the problems of traditional manual pencil sharpeners, such as laborious operation, inconsistent sharpening results, and easy breakage of pencils. By using a motor to drive the blade, it replaces manual labor with mechanical power, achieving fast and precise pencil sharpening. This provides people with a more convenient and efficient pencil sharpening option, meeting the modern society's demand for efficient and convenient office and school supplies. In an electric pencil sharpener, the transmission mechanism is one of its core components. Its design and performance directly affect the sharpener's performance and lifespan. The transmission mechanism is located between the motor and the blade holder, and is generally a gear set. Through the transmission mechanism, the rotational power of the motor is transmitted to the sharpening blade, achieving automatic pencil sharpening. For example, Chinese utility model patent CN207224917U discloses a pencil sharpener, including a shell, a pencil sharpener body, a pencil insertion hole, and an inner cover. The pencil sharpener body contains a motor; a double-ended blade holder; two first and second blades of different diameters disposed within the double-ended blade holder; a gear that drives the blade holder to rotate; a connecting gear; a spring located above the double-ended blade holder; and a switch structure connected to the motor. The gear that drives the blade holder to rotate and the connecting gear are meshed with the transmission gear of the motor, so that the transmission gear of the motor drives the blades within the double-ended blade holder to move axially through the gear that drives the blade holder to rotate and the connecting gear. In this technical solution, after the first gear, the connecting gear, and the second gear are sequentially meshed, the connecting gear meshes with the transmission gear of the motor. The arrangement of the gears is relatively scattered and lacks compactness, resulting in a large overall size of the electric pencil sharpener and an unrefined appearance, making it difficult to meet the portability needs of students and other users. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide an electric pencil sharpener that achieves advantages such as small size, light weight, high transmission efficiency, and reliable performance by optimizing the layout and structure of the transmission components, thereby meeting the user's portability needs.

[0004] This application provides an electric pencil sharpener, including a housing, a blade holder assembly and a motor installed inside the housing, a transmission assembly between the blade holder assembly and the motor, the motor driving the blade holder assembly to rotate through the transmission assembly, a first gear at the output end of the motor, a second gear at the blade holder assembly, and the transmission assembly including a first gear set and a second gear set connected by transmission, the first gear set meshing with the first gear, the second gear set meshing with the second gear, the first gear and the second gear being distributed vertically, and the first gear set and the second gear set being coaxially distributed.

[0005] In this technical solution, the housing protects the internal components and provides structural support. The tool holder assembly is installed inside the housing to stabilize the pencil sharpener. The motor is also installed inside the housing to provide the power required for sharpening. The transmission assembly connects the motor and the tool holder assembly, transmitting the motor's power to the tool holder assembly, driving it to rotate and complete the sharpening process. A first gear is installed at the motor's output end, meshing with a first gear set to transmit the motor's power. A second gear is installed on the tool holder assembly, meshing with a second gear set to receive the power from the first gear set and drive the tool holder assembly to rotate. By rationally designing the gear ratios of each gear set, the rotational speed of the tool holder assembly can be precisely controlled to ensure accurate pencil sharpening. To ensure consistent and high-quality performance, the first and second gear sets are designed to be coaxially distributed, allowing them to be closely arranged in space. This reduces the lateral dimensions of the transmission components, making them more compact. The first and second gears are also arranged vertically to optimize space utilization. The entire transmission assembly is designed to be very compact, significantly reducing the overall size of the electric pencil sharpener and making it more portable. This solution optimizes the layout and structure of the transmission components, achieving advantages such as small size, light weight, high transmission efficiency, and reliable performance. It not only meets the modern user's needs for portability and efficiency but also improves the overall performance and user experience of the product, demonstrating promising market application prospects.

[0006] As an improvement, the transmission assembly further includes a third gear set, with both the first and second gear sets meshing with it. The first and second gear sets are connected via the third gear set. In this technical solution, a third gear set is added to the transmission assembly, meshing with both the first and second gear sets, serving as an intermediate transmission. The motor's power is transmitted from the first gear to the first gear set, then from the third gear set to the second gear set, ultimately driving the second gear and the tool holder assembly to rotate, forming a multi-stage transmission assembly. This allows for more flexible adjustment of the transmission ratio. Through multi-stage transmission, the smoothness of power transmission can be better controlled, vibration and noise reduced, and pencil sharpening quality improved. The multi-stage transmission assembly can also distribute the load, reducing the force on individual gears, thereby improving the stability and reliability of the entire transmission assembly.

[0007] As an improvement, the first gear set includes a third gear and a fourth gear that rotate synchronously. The third gear meshes with the first gear, and the fourth gear meshes with the third gear set. The diameters of the second gear and the third gear are both larger than the diameter of the first gear, and the diameter of the fourth gear is smaller than the diameter of the third gear. In this technical solution, the first gear set meshes with the first gear at the output end of the motor through the third gear. The first gear set meshes with the third gear set through the fourth gear. The power of the motor is transmitted from the first gear to the third gear, then from the fourth gear to the third gear set, and finally from the third gear set to the second gear set, driving the blade holder assembly to rotate. This ensures the continuity and stability of power transmission. Through the multi-stage transmission of the third and fourth gears, more precise transmission ratio adjustment can be achieved, resulting in finer speed control. On the other hand, the first, second, third, fourth, and second gear sets are distributed in multiple layers in the axial direction, effectively utilizing vertical space and reducing the size of the transmission assembly in the horizontal direction. Furthermore, the first and fourth gears are designed with smaller diameters, while the second and third gears have larger diameters. Each layer uses a large gear and a small gear meshing method. This design can achieve more efficient transmission within a limited space, while reducing the gaps between components, making the entire transmission assembly more compact, thereby reducing the overall size of the electric pencil sharpener and further improving portability.

[0008] As an improvement, the second gear set includes a fifth gear and a sixth gear that rotate synchronously. The fifth gear meshes with the second gear, and the sixth gear meshes with the third gear set. The diameters of the second gear and the sixth gear are both larger than the diameter of the fifth gear. In this technical solution, the second gear set meshes with the second gear on the tool holder assembly via the fifth gear. The second gear set meshes with the third gear set via the sixth gear. The motor's power is transmitted from the first gear to the third gear, then from the fourth gear to the third gear set, then from the third gear set to the sixth gear, and finally from the fifth gear to the second gear, driving the tool holder assembly to rotate. This ensures the continuity and stability of power transmission. Through the multi-stage transmission of the fifth and sixth gears, more precise transmission ratio adjustment can be achieved, allowing for more flexible control of the tool holder assembly's speed. On the other hand, the gears are distributed in multiple layers in the vertical direction, effectively utilizing vertical space and reducing the horizontal dimensions of the transmission assembly. Furthermore, the first, fourth, and fifth gears are designed with smaller diameters, while the second, third, and sixth gears have larger diameters. The smaller-diameter first gear meshes with the larger-diameter third gear, and the smaller-diameter fifth gear meshes with the larger-diameter second gear, reducing the gap between gears and making the entire transmission assembly more compact. This reduces the overall size of the electric pencil sharpener and further improves portability.

[0009] As an improvement, the third gear set includes a seventh gear and an eighth gear that rotate synchronously. The seventh gear meshes with the fourth gear, and the eighth gear meshes with the sixth gear. The diameter of the seventh gear is larger than the diameter of the eighth gear. In this technical solution, the third gear set meshes with the fourth gear of the first gear set via the seventh gear, and the third gear set meshes with the sixth gear of the second gear set via the eighth gear. The motor's power is transmitted from the first gear to the third gear, then from the fourth gear to the seventh gear, then from the eighth gear to the sixth gear, and finally from the fifth gear to the second gear, driving the blade holder assembly to rotate. This ensures the continuity and stability of power transmission. Through the multi-stage transmission of the seventh and eighth gears, more precise transmission ratio adjustment can be achieved, allowing for more flexible control of the blade holder assembly's speed. On the other hand, the gears are distributed in multiple layers in the vertical direction, effectively utilizing vertical space and reducing the size of the transmission assembly in the horizontal direction. Furthermore, the first, fourth, fifth, and eighth gears are designed with smaller diameters, while the second, third, sixth, and seventh gears have larger diameters. Each layer uses a large gear meshing with a small gear. This design achieves more efficient transmission within a limited space, while reducing the gaps between components, making the entire transmission assembly more compact, thereby reducing the overall size of the electric pencil sharpener and further improving portability.

[0010] As an improvement, the second gear, second gear set, and third gear set are arranged in a triangular pattern. In this technical solution, the triangular arrangement of the second gear, second gear set, and third gear set further optimizes space utilization, reduces the gap between gears, and allows for a more compact overall layout of each gear in space. Furthermore, the first gear and second gear are arranged vertically, and the first gear set and second gear set are arranged vertically along the same axis. This arrangement does not increase the size of the transmission components in the vertical direction, further optimizing space utilization and reducing the size of the electric pencil sharpener.

[0011] As an improvement, the transmission assembly further includes a first connecting shaft and a second connecting shaft arranged in parallel. The third, fourth, fifth, and sixth gears are all mounted on the first connecting shaft, and the seventh and eighth gears are all mounted on the second connecting shaft. In this technical solution, the third, fourth, fifth, and sixth gears are all mounted on the first connecting shaft, which further optimizes space utilization and reduces the dimensions of the transmission system in both the horizontal and vertical directions, making the entire system more compact. By mounting multiple gears on the parallel-distributed first and second connecting shafts, this layout significantly reduces the dimensions of the transmission assembly in the horizontal direction, making the entire transmission system more compact. This not only reduces the overall size of the electric pencil sharpener but also improves portability.

[0012] As an improvement, the housing is provided with a mounting cavity for accommodating the transmission components. A first mounting seat is fitted onto the end of the first connecting shaft, and the first connecting shaft is confined within the mounting cavity by the first mounting seat. A second mounting seat is fitted onto the end of the second connecting shaft, and the second connecting shaft is confined within the mounting cavity by the second mounting seat. In this technical solution, the first connecting shaft and its gear are mounted in the mounting cavity via the first mounting seat, and the second connecting shaft and its gear are mounted in the mounting cavity via the second mounting seat. This makes the installation of the transmission components more stable and reliable, reduces vibration in the transmission system, makes the pencil sharpening process smoother, and improves the pencil sharpening quality.

[0013] As an improvement, the fifth, sixth, fourth, and third gears are arranged sequentially along the axial direction on the first connecting shaft, and the second mounting base is provided with a groove to accommodate the third gear. In this technical solution, by arranging multiple gears sequentially along the axial direction on the first connecting shaft, the dimensions of the transmission assembly in both the horizontal and vertical directions are reduced, and the clearance between the gears is decreased, making the entire transmission system more compact. The third gear is located at the bottom of the first connecting shaft, and is closest to both the first and second mounting bases. By providing a groove on the second mounting base, the rotation of the third gear on the first connecting shaft is not interfered with by the second mounting base, ensuring the compactness and stability of the entire transmission assembly. This not only optimizes space utilization but also improves assembly flexibility and reliability.

[0014] As an improvement, the third, sixth, and seventh gears all have the same diameter, as do the fourth, fifth, and eighth gears. In this technical solution, by designing multiple gears to have the same diameter, the manufacturing process can be simplified, the number of molds reduced, and production costs lowered. The uniform gear diameter makes the assembly process more standardized, reduces assembly errors, and improves assembly efficiency, thereby enhancing the stability and reliability of the entire transmission assembly. 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 a partial structural diagram of an electric pencil sharpener according to this application.

[0017] Figure 3 This is a three-dimensional structural diagram of the first gear, the second gear, and the transmission assembly in this application.

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

[0019] The figure shows: 1. Housing; 11. Mounting cavity; 2. Tool holder assembly; 21. Second gear; 3. Motor; 31. First gear; 4. Transmission assembly; 41. First gear set; 411. Third gear; 412. Fourth gear; 42. Second gear set; 421. Fifth gear; 422. Sixth gear; 43. Third gear set; 431. Seventh gear; 432. Eighth gear; 44. First connecting shaft; 45. Second connecting shaft; 46. First mounting base; 47. Second mounting base; 471. Groove. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] like Figures 1 to 4 As shown, this application discloses an electric pencil sharpener, including a housing 1. A blade holder assembly 2 and a motor 3 are installed inside the housing 1. A transmission assembly 4 is provided between the blade holder assembly 2 and the motor 3. The motor 3 drives the blade holder assembly 2 to rotate through the transmission assembly 4. A first gear 31 is provided at the output end of the motor 3, and a second gear 21 is provided at the output end of the blade holder assembly 2. The transmission assembly 4 includes a first gear set 41 and a second gear set 42 connected by transmission. The first gear set 41 meshes with the first gear 31, and the second gear set 42 meshes with the second gear 21. The first gear 31 and the second gear 21 are arranged vertically, and the first gear set 41 and the second gear set 42 are arranged coaxially. The housing 1 serves to protect the internal components and provide structural support. The blade holder assembly 2 is installed inside the housing 1 to stabilize the pencil sharpener. The motor 3 is installed inside the housing 1 to provide the power required for sharpening the pencil. The transmission assembly 4 connects the motor 3 and the blade holder assembly 2, transmitting the power of the motor 3 to the blade holder assembly 2, driving the blade holder assembly 2 to rotate and complete the pencil sharpening. A first gear 31 is installed at the output end of the motor 3. The first gear 31 meshes with the first gear set 42. The gear set 41 meshes to transmit the power of the motor 3. A second gear 21 is installed on the blade holder assembly 2, and the second gear 21 meshes with the second gear set 42 to receive the power of the first gear set 41 and drive the blade holder assembly 2 to rotate. By rationally designing the gear ratio of each gear set, the rotation speed of the blade holder assembly 2 can be precisely controlled to ensure the consistency and high quality of the pencil sharpening effect. The first gear set 41 and the second gear set 42 are designed to be coaxially distributed, so that the two gear sets are closely arranged in space, reducing the lateral size of the transmission assembly 4 and making the transmission assembly 4 more compact in space. The first gear 31 and the second gear 21 are designed to be distributed vertically to optimize space utilization. The entire transmission assembly 4 is designed to be very compact, significantly reducing the overall size of the electric pencil sharpener and making it more portable. In this solution, by optimizing the layout and structure of the transmission assembly 4, the advantages of small size, light weight, high transmission efficiency, and reliable performance are achieved. It not only meets the needs of modern users for portability and efficiency, but also improves the overall performance and user experience of the product, and has good market application prospects.

[0025] More specifically, such as Figures 2 to 4As shown, the transmission assembly 4 also includes a third gear set 43. The first gear set 41 and the second gear set 42 both mesh with the third gear set 43. The first gear set 41 and the second gear set 42 are connected by the third gear set 43. The addition of the third gear set 43 to the transmission assembly 4, which meshes with both the first gear set 41 and the second gear set 42, serves as an intermediate transmission. The power of the motor 3 is transmitted to the first gear set 41 through the first gear 31, and then to the second gear set 42 through the third gear set 43, ultimately driving the second gear 21 and the tool holder assembly 2 to rotate, forming a multi-stage transmission assembly 4. This allows for more flexible adjustment of the transmission ratio. Through multi-stage transmission, the smoothness of power transmission can be better controlled, vibration and noise can be reduced, and the quality of pencil sharpening can be improved. The multi-stage transmission assembly 4 can distribute the load and reduce the force on individual gears, thereby improving the stability and reliability of the entire transmission assembly 4.

[0026] More specifically, such as Figures 2 to 4 As shown, the first gear set 41 includes a third gear 411 and a fourth gear 412 that rotate synchronously. The third gear 411 meshes with the first gear 31, and the fourth gear 412 meshes with the third gear set 43. The diameters of the second gear 21 and the third gear 411 are both larger than the diameter of the first gear 31, while the diameter of the fourth gear 412 is smaller than the diameter of the third gear 411. The first gear set 41 meshes with the first gear 31 at the output end of the motor 3 through the third gear 411, and with the third gear set 43 through the fourth gear 412. The power of the motor 3 is transmitted from the first gear 31 to the third gear 411, then to the third gear set 43 through the fourth gear 412, and finally to the second gear set 42 through the third gear set 43, driving the tool holder assembly 2 to rotate, ensuring the continuity of power transmission. Stability is achieved through the multi-stage transmission of the third gear 411 and the fourth gear 412, enabling more precise transmission ratio adjustment and finer speed control. Furthermore, the multi-layered distribution of the first gear 31, second gear 21, third gear 411, fourth gear 412, and second gear set 42 in the axial direction effectively utilizes vertical space, reducing the horizontal dimensions of the transmission assembly 4. The design features smaller diameters for the first gear 31 and fourth gear 412, and larger diameters for the second gear 21 and third gear 411. Each layer employs a large gear and a small gear meshing method. This design achieves more efficient transmission within a limited space, while reducing gaps between components, making the entire transmission assembly 4 more compact and thus reducing the overall size of the electric pencil sharpener, further improving portability.

[0027] More specifically, such as Figures 2 to 4As shown, the second gear set 42 includes a fifth gear 421 and a sixth gear 422 that rotate synchronously. The fifth gear 421 meshes with the second gear 21, and the sixth gear 422 meshes with the third gear set 43. The diameters of both the second gear 21 and the sixth gear 422 are larger than the diameter of the fifth gear 421. The second gear set 42 meshes with the second gear 21 on the tool holder assembly 2 through the fifth gear 421, and with the third gear set 43 through the sixth gear 422. The power from the motor 3 is transmitted from the first gear 31 to the third gear 411, then from the fourth gear 412 to the third gear set 43, then from the third gear set 43 to the sixth gear 422, and finally from the fifth gear 421 to the second gear 21, driving the tool holder assembly 2 to rotate, ensuring the continuity of power transmission. To improve stability, the multi-stage transmission of the fifth gear 421 and the sixth gear 422 enables more precise transmission ratio adjustment and more flexible control of the rotational speed of the blade holder assembly 2. On the other hand, the gears are distributed in multiple layers in the vertical direction, effectively utilizing vertical space and reducing the size of the transmission assembly 4 in the horizontal direction. Furthermore, the design of the first gear 31, the fourth gear 412, and the fifth gear 421 with smaller diameters, and the second gear 21, the third gear 411, and the sixth gear 422 with larger diameters, with the smaller diameter first gear 31 meshing with the larger diameter third gear 411, and the smaller diameter fifth gear 421 meshing with the larger diameter second gear 21, reduces the gap between gears, making the entire transmission assembly 4 more compact, thereby reducing the overall size of the electric pencil sharpener and further improving portability.

[0028] More specifically, such as Figures 2 to 4As shown, the third gear set 43 includes a seventh gear 431 and an eighth gear 432 that rotate synchronously. The seventh gear 431 meshes with the fourth gear 412, and the eighth gear 432 meshes with the sixth gear 422. The diameter of the seventh gear 431 is larger than the diameter of the eighth gear 432. The third gear set 43 meshes with the fourth gear 412 of the first gear set 41 through the seventh gear 431, and with the sixth gear 422 of the second gear set 42 through the eighth gear 432. The power of the motor 3 is transmitted from the first gear 31 to the third gear 411, then from the fourth gear 412 to the seventh gear 431, then from the eighth gear 432 to the sixth gear 422, and finally from the fifth gear 421 to the second gear 21, driving the tool holder assembly 2 to rotate, ensuring the continuity and stability of power transmission. Through the multi-stage transmission of the seventh gear 431 and the eighth gear 432, more precise transmission ratio adjustment can be achieved, allowing for more flexible control of the rotational speed of the blade holder assembly 2. On the other hand, the gears are distributed in multiple layers in the vertical direction, effectively utilizing vertical space and reducing the size of the transmission assembly 4 in the horizontal direction. Furthermore, the diameters of the first gear 31, the fourth gear 412, the fifth gear 421, and the eighth gear 432 are smaller, while the diameters of the second gear 21, the third gear 411, the sixth gear 422, and the seventh gear 431 are larger. Each layer adopts a meshing method of a large gear and a small gear. This design can achieve more efficient transmission in a limited space, while reducing the gaps between parts, making the entire transmission assembly 4 more compact, thereby reducing the overall size of the electric pencil sharpener and further improving portability.

[0029] More specifically, such as Figures 2 to 4 As shown, the second gear 21, the second gear set 42, and the third gear set 43 are arranged in a triangular pattern. This triangular arrangement further optimizes space utilization and reduces the gap between gears. The triangular distribution allows each gear to maintain a more compact overall layout in space. The first gear 31 is arranged vertically with the second gear 21, and the first gear set 41 is arranged vertically with the second gear set 42 along the same axis. The first gear 31 and the first gear set 41 do not increase the size of the transmission component 4 in the vertical direction, further optimizing space utilization and reducing the size of the electric pencil sharpener.

[0030] More specifically, such as Figures 2 to 4As shown, the transmission assembly 4 also includes a first connecting shaft 44 and a second connecting shaft 45 that are distributed in parallel. The third gear 411, the fourth gear 412, the fifth gear 421, and the sixth gear 422 are all mounted on the first connecting shaft 44, and the seventh gear 431 and the eighth gear 432 are all mounted on the second connecting shaft 45. The third gear 411, the fourth gear 412, the fifth gear 421, and the sixth gear 422 are all mounted on the first connecting shaft 44, which further optimizes space utilization and reduces the size of the transmission system in the horizontal and vertical directions, making the entire system more compact. By mounting multiple gears on the first connecting shaft 44 and the second connecting shaft 45 that are distributed in parallel, this layout significantly reduces the size of the transmission assembly 4 in the horizontal direction, making the entire transmission system more compact. This not only reduces the overall size of the electric pencil sharpener but also improves portability.

[0031] More specifically, such as Figures 2 to 4 As shown, the housing 1 has a mounting cavity 11 for accommodating the transmission assembly 4. The end of the first connecting shaft 44 is fitted with a first mounting seat 46, and the first connecting shaft 44 is confined within the mounting cavity 11 by the first mounting seat 46. The end of the second connecting shaft 45 is fitted with a second mounting seat 47, and the second connecting shaft 45 is confined within the mounting cavity 11 by the second mounting seat 47. The first connecting shaft 44 and its gear are installed in the mounting cavity 11 by the first mounting seat 46, and the second connecting shaft 45 and its gear are installed in the mounting cavity 11 by the second mounting seat 47. The installation of the transmission assembly 4 is more stable and reliable, reducing vibration in the transmission system, making the pencil sharpening process smoother, and improving the pencil sharpening quality.

[0032] More specifically, such as Figures 2 to 4 As shown, the fifth gear 421, the sixth gear 422, the fourth gear 412, and the third gear 411 are arranged sequentially along the axial direction on the first connecting shaft 44. The second mounting base 47 is provided with a groove 471 to avoid the third gear 411. By arranging multiple gears sequentially along the axial direction on the first connecting shaft 44, the dimensions of the transmission assembly 4 in the horizontal and vertical directions are reduced, and the gap between the gears is reduced, making the entire transmission system more compact. The third gear 411 is located at the bottom of the first connecting shaft 44. The third gear 411 is closest to the first mounting base 46 and the second mounting base 47. By providing the groove 471 on the second mounting base 47, the rotation of the third gear 411 on the first connecting shaft 44 is not interfered with by the second mounting base 47, ensuring the compactness and stability of the entire transmission assembly 4. This not only optimizes space utilization but also improves the flexibility and reliability of assembly.

[0033] More specifically, such as Figures 2 to 4As shown, the diameters of the third gear 411, the sixth gear 422, and the seventh gear 431 are all the same, as are the diameters of the fourth gear 412, the fifth gear 421, and the eighth gear 432. By designing the diameters of multiple gears to be the same, the manufacturing process can be simplified, the number of molds can be reduced, and the production cost can be lowered. The uniform gear diameter makes the assembly process more standardized, reduces assembly errors, and improves assembly efficiency, thereby improving the stability and reliability of the entire transmission assembly 4.

[0034] 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 housing (1), wherein a blade holder assembly (2) and a motor (3) are installed within the housing (1), and a transmission assembly (4) is provided between the blade holder assembly (2) and the motor (3), wherein the motor (3) drives the blade holder assembly (2) to rotate via the transmission assembly (4), characterized in that, The output end of the motor (3) is provided with a first gear (31), the tool holder assembly (2) is provided with a second gear (21), and the transmission assembly (4) includes a first gear set (41) and a second gear set (42) connected by transmission. The first gear set (41) meshes with the first gear (31), and the second gear set (42) meshes with the second gear (21). The first gear (31) and the second gear (21) are distributed vertically, and the first gear set (41) and the second gear set (42) are distributed coaxially.

2. The electric pencil sharpener according to claim 1, characterized in that, The transmission assembly (4) further includes a third gear set (43), wherein the first gear set (41) and the second gear set (42) are both meshed with the third gear set (43), and the first gear set (41) and the second gear set (42) are connected by transmission through the third gear set (43).

3. An electric pencil sharpener according to claim 2, characterized in that, The first gear set (41) includes a third gear (411) and a fourth gear (412) that rotate synchronously. The third gear (411) meshes with the first gear (31), and the fourth gear (412) meshes with the third gear set (43). The diameters of the second gear (21) and the third gear (411) are both larger than the diameter of the first gear (31), and the diameter of the fourth gear (412) is smaller than the diameter of the third gear (411).

4. An electric pencil sharpener according to claim 3, characterized in that, The second gear set (42) includes a fifth gear (421) and a sixth gear (422) that rotate synchronously. The fifth gear (421) meshes with the second gear (21), and the sixth gear (422) meshes with the third gear set (43). The diameters of the second gear (21) and the sixth gear (422) are both larger than the diameter of the fifth gear (421).

5. An electric pencil sharpener according to claim 4, characterized in that, The third gear set (43) includes a seventh gear (431) and an eighth gear (432) that rotate synchronously. The seventh gear (431) meshes with the fourth gear (412), and the eighth gear (432) meshes with the sixth gear (422). The diameter of the seventh gear (431) is larger than the diameter of the eighth gear (432).

6. An electric pencil sharpener according to claim 5, characterized in that, The second gear (21), the second gear set (42), and the third gear set (43) are arranged in a triangular pattern.

7. An electric pencil sharpener according to claim 5, characterized in that, The transmission assembly (4) further includes a first connecting shaft (44) and a second connecting shaft (45) distributed in parallel. The third gear (411), the fourth gear (412), the fifth gear (421) and the sixth gear (422) are all mounted on the first connecting shaft (44), and the seventh gear (431) and the eighth gear (432) are all mounted on the second connecting shaft (45).

8. An electric pencil sharpener according to claim 7, characterized in that, The housing (1) is provided with a mounting cavity (11) for accommodating the transmission assembly (4). The end of the first connecting shaft (44) is fitted with a first mounting seat (46), and the first connecting shaft (44) is limited to the mounting cavity (11) by the first mounting seat (46). The end of the second connecting shaft (45) is fitted with a second mounting seat (47), and the second connecting shaft (45) is limited to the mounting cavity (11) by the second mounting seat (47).

9. An electric pencil sharpener according to claim 8, characterized in that, The fifth gear (421), the sixth gear (422), the fourth gear (412) and the third gear (411) are arranged sequentially along the axial direction on the first connecting shaft (44), and the second mounting base (47) is provided with a groove (471) to avoid the third gear (411).

10. An electric pencil sharpener according to claim 5, characterized in that, The third gear (411), the sixth gear (422), and the seventh gear (431) all have the same diameter, as do the fourth gear (412), the fifth gear (421), and the eighth gear (432).

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