Electric pencil sharpener

Abstract

The utility model discloses a kind of electric pencil sharpener, including tool rest and driving motor, and the pencil sharpening inlet of tool rest is provided with in-and-out pen mechanism;In-and-out pen mechanism includes vortex disc that is rotated with tool rest cooperation, still include the first pivot and the second pivot that are cooperated with vortex disc;Vortex disc direct drive its two inner spin and go into pen, vortex disc reverse drive its two outer spin and go out pen;Still include the control assembly of control driving motor rotating direction and the reverse trigger assembly for triggering control assembly and make driving motor reverse;Reverse trigger assembly is set to pencil sharpening outlet, and it is in the movable path that pencil lead exposes tool rest;So that when pencil lead exposes tool rest reaches certain position when pencil sharpening is completed, trigger reverse trigger assembly, make control assembly control driving motor reverse, cooperate in-and-out pen mechanism to realize the action of withdrawing pen;The accuracy of guaranteeing withdrawing pen timing avoids the problem caused by withdrawing pen too early or too late, improves the convenience of use and pencil sharpening effect.

Description

Technical Field

[0001] This utility model relates to the field of pencil sharpener manufacturing and design, and more specifically, to an electric pencil sharpener. Background Technology

[0002] With the continuous development of the stationery market and the increasing demand for convenient writing tools, electric pencil sharpeners, with their significant advantages of efficiency and convenience, have rapidly gained an important position in various scenarios, becoming a common tool in schools, offices, art studios, and other places. Compared to traditional manual pencil sharpeners, electric pencil sharpeners automate the pencil sharpening process by using a motor to drive the blade holder, greatly saving users' time and effort and improving pencil sharpening efficiency.

[0003] The automatic pencil advance and retraction function is an important innovation in the development of electric pencil sharpeners. It is closely related to and complements electric pencil sharpeners. It makes the operation of electric pencil sharpeners more intelligent and user-friendly. Users do not need to manually insert and remove the pencil from the blade holder. They only need to place the pencil in the designated position, and the electric pencil sharpener can automatically complete the entire process of pencil advance, sharpening, and retraction. This function further enhances the convenience of pencil sharpening.

[0004] The timing of the pencil's forward and backward strokes is closely linked to the sharpening time, and a delicate balance must be struck between the two. If the forward and backward strokes are too long, the entire sharpening process becomes tedious and cumbersome; conversely, if the forward and backward strokes are too short, the pencil will start retracting before it has been sharpened to the desired state, thus affecting the writing experience. Furthermore, some electric pencil sharpeners on the market currently use a fixed sharpening time design, which cannot be flexibly adjusted according to the actual condition of the pencil. Different types of pencils, such as brand new, unsharpened pencils and partially sharpened pencils, require significantly different sharpening times. If all are sharpened according to a uniform time, brand new pencils may not be sufficiently sharpened, resulting in a less-than-sharp tip, requiring users to sharpen again to meet their needs, wasting time and effort; while already sharpened pencils may be over-sharpened, causing lead breakage or wasting the pencil, increasing usage costs. In addition, some electric pencil sharpeners use a combination of sensors and circuit chips to achieve automatic pen advance and retraction functions. This requires engineers to perform complex circuit design and programming, and to conduct multiple debugging and optimizations to ensure its normal operation, which consumes a lot of time and manpower. In the production process, the purchase cost of sensors and circuit chips is high, and their production process is relatively complex, with more stringent requirements for production equipment and technology, which further increases the manufacturing cost of the product.

[0005] In conclusion, the market urgently needs an electric pencil sharpener that can accurately control the advance and retreat time of the pencil, adapt to different pencil conditions, and is reasonably priced, in order to meet the growing needs of users. Utility Model Content

[0006] This utility model overcomes the shortcomings of the prior art and provides an electric pencil sharpener with a simple structure, reasonable design, precise control of the advance and retreat time, adaptability to pencils in different states, and reasonable cost.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: An electric pencil sharpener includes a mounting base and a blade holder and a drive motor mounted on the mounting base. The drive motor drives the blade holder to rotate. It also includes a control module for controlling the operating state of the drive motor. The blade holder has a sharpening inlet at one end for pencils to enter and a sharpening outlet at the other end for pencil leads to emerge from the blade holder. The sharpening inlet has a pencil feeding / exit mechanism. This mechanism includes a volute that cooperates with and rotates with the blade holder, and a first and second rotating shaft that cooperate with the volute. The volute surface has a turbine-shaped, arc-segmented rack. The first and second rotating shafts have impellers that mesh with the rack. Rotation of the volute drives the first and second rotating shafts to rotate. Forward rotation of the volute causes both shafts to rotate inward to feed pencils, while reverse rotation causes them to rotate outward to expel pencils. The control module includes a control component for controlling the rotation direction of the drive motor and a reversing trigger component for triggering the control component to reverse the drive motor. The reversing trigger component is located at the sharpening outlet and along the path where the pencil lead emerges from the blade holder.

[0008] Furthermore, a transmission assembly is provided between the tool holder and the drive motor. The transmission assembly includes a transmission gear and a rotating gear mounted on the mounting base. The transmission gear engages with the drive motor and the rotating gear. The reversing trigger assembly includes a trigger shaft, which is movably mounted on the mounting base. The trigger shaft passes through the rotating gear, and one end engages with the tool holder and is located on the path where the pen refill protrudes from the tool holder. The trigger shaft movably engages with the rotating gear and the tool holder. The direction of movement of the trigger shaft corresponds to its axial direction. The other end of the trigger shaft triggers the control assembly to reverse the drive motor. A first mating part is provided on the trigger shaft along its axial direction, and a second mating part and a third mating part are respectively provided on the rotating gear and the tool holder to engage with the first mating part.

[0009] Furthermore, a through hole is provided at the center point of the rotating gear for the trigger shaft to pass through, and a second mating part is provided at the through hole; a connecting part is provided at the tool holder corresponding to the sharpening pen outlet, and a connecting space is provided inside the connecting part, which communicates with the inside of the tool holder through the sharpening pen outlet; the third mating part is provided inside the connecting space; the length of the trigger shaft's moving path is less than the depth of the connecting space, and the first mating part is always in a mating state with the third mating part.

[0010] Furthermore, the control module includes a forward rotation triggering component for triggering the control component to make the drive motor rotate forward; the forward rotation triggering component includes a trigger rod movably mounted on the mounting base and a pen-feeding sensing mechanism that drives the trigger rod to trigger the control component; a pen-feeding box is provided at the pencil sharpening inlet, and the pen-feeding mechanism and the pen-feeding sensing mechanism are located inside the pen-feeding box; the pen-feeding box is provided with a pen-feeding opening corresponding to the pencil sharpening inlet; the pen-feeding sensing mechanism includes a rotating rod located on the pencil feeding path and a trigger block fixedly mounted on the rotating rod; the pencil feeding and discharging causes the rotating rod and the trigger block on it to rotate; one end of the trigger rod is located inside the pen-feeding box, and the moving path of the trigger rod intersects with the moving path of the trigger block; the control component is located on the moving path of the trigger rod.

[0011] Furthermore, the control component includes a switch housing rotatably mounted on a mounting base and a changeover switch fixed inside the switch housing and moving therewith; the changeover switch is provided with a forward rotation button, the movement path of the forward rotation button intersects with the movement path of the trigger rod; the movement direction of the trigger rod corresponds to its axial direction; the control module includes a changeover component that cooperates with the trigger shaft to drive the switch housing to rotate.

[0012] Furthermore, the switching assembly includes a switching gear, a gear mounting shaft, and a switching rack; a mounting plate is fixedly mounted on the mounting base, and the switching rack is movably mounted on the mounting plate; the gear mounting shaft is rotatably mounted on the mounting base and / or the mounting plate; the switching gear includes a first switching gear and a second switching gear mounted on the gear mounting shaft; the first switching gear and the switching rack mesh with each other; a mating tooth is provided at the end of the trigger shaft away from the tool holder, arranged circumferentially thereon, and the second switching gear is located on the moving path of the mating tooth; the trigger shaft drives the gear mounting shaft and the first switching gear to rotate through the engagement of the mating tooth with the second switching gear; the switching rack is connected to the switch housing and drives the switch housing and the switching switch to rotate.

[0013] Furthermore, the control module includes a start-up component, which includes a start-up switch and a pen-feeding detection mechanism; the pen-feeding detection mechanism is set inside the pen box to detect whether a pen is being fed in, and works with the start-up switch to control the start-stop state of the drive motor.

[0014] Furthermore, the switching assembly includes a reset post and a reset spring; both the switching rack and the mounting plate are provided with reset posts, and the two ends of the reset spring cooperate with the reset posts on the switching rack and the mounting plate, respectively.

[0015] Furthermore, it includes a reset mechanism that drives the trigger shaft to reset. The reset mechanism includes a reset rod and a reset switch. The reset rod is connected to the trigger shaft, and the reset switch cooperates with the reset rod to push the trigger shaft toward the tool holder.

[0016] Furthermore, an adjustment mechanism is included, comprising an adjustment knob for adjusting the position of the second switching gear and an adjustment switch for controlling the adjustment knob; both ends of the gear mounting shaft are rotatably connected to the mounting base and the mounting plate, respectively, and the gear mounting shaft can move along its own axial direction; the adjustment knob is rotatably mounted on the mounting plate; the adjustment switch engages with the outer surface of the adjustment knob and drives the adjustment knob to rotate; one end of the gear mounting shaft passes through the mounting plate, and the inner surface of the adjustment knob is provided with an inclined contact surface that engages with the end of the gear mounting shaft; a return spring is also sleeved on the gear mounting shaft, and both ends of the return spring abut against the mounting base and the surface of the second switching gear facing the mounting base, respectively. Beneficial effects

[0017] In this invention, an infeed / outfeed mechanism is installed at the pencil sharpening inlet. Utilizing the cooperation of a vortex feeder with the first and second rotating shafts, and the meshing design of the vortex feeder rack and impeller, automatic pencil feeding and retraction are achieved. A reversal trigger component is included in the control module and positioned at the pencil sharpening outlet along the path where the lead protrudes from the blade holder. This triggers the reversal when the lead protrudes from the blade holder to a certain position after sharpening, causing the control component to control the drive motor to reverse, thus retracting the pencil. This ensures the accuracy of the retraction timing, minimizing problems caused by premature or delayed retraction, and further improving ease of use and sharpening effect. Furthermore, since the reversal trigger component is only activated when the lead protrudes from the blade holder to a certain extent, the triggering of the retraction action in this invention is determined by the pencil's state. This allows for better adaptation to the sharpening needs of pencils in different states, avoiding problems such as insufficient sharpening of brand-new pencils or over-sharpening of already sharpened pencils.

[0018] In this invention, mechanical structures such as a vortex, a rotating shaft, a rack, and an impeller are used to achieve the automatic pen advance and retraction function. Compared with some methods that combine sensors and circuit chips to achieve automatic pen advance and retraction, this design avoids complex circuit design and programming. The mechanical structure not only improves the stability and reliability of use, but also reduces the overall cost of this invention compared to high-cost components such as sensors and circuit chips.

[0019] In this invention, the trigger shaft is movably mounted on the mounting base, with one end engaging with the blade holder and positioned along the path where the pencil lead protrudes from the blade holder. The other end triggers the control component to reverse the drive motor. After the pencil is sharpened, the pencil lead protrudes from the blade holder and pushes the trigger shaft to move along its axial direction. The other end of the trigger shaft accurately triggers the control component, thereby reversing the drive motor and achieving the pencil retraction action. This design can accurately capture the signal that the pencil sharpening is complete, allowing the invention to trigger the drive motor to reverse at the appropriate time, thus minimizing problems such as over-sharpening or poor pencil retraction caused by inaccurate triggering timing.

[0020] In this invention, the engagement of the trigger shaft with the rotating gear and the tool holder is achieved through the first engagement part, the second engagement part, and the third engagement part; the trigger shaft also serves as a transmission shaft, reducing the need for independent transmission shafts in the electric pencil sharpener, and simplifying the overall structure while ensuring power transmission function; at the same time, this simple mechanical structure has high reliability and is not prone to failure.

[0021] In this invention, a through hole is provided at the center point of the rotating gear for the trigger shaft to pass through, and the second mating part is disposed at this through hole. This design ensures that the mating position between the trigger shaft and the rotating gear is at the center of the rotating gear, enabling stable power transmission to the trigger shaft when the rotating gear rotates. The arrangement of the connecting part and the connecting space further stabilizes the mating and power transmission between the trigger shaft and the tool holder.

[0022] In this invention, since the length of the trigger shaft's active path is less than the depth of the connecting space, and the first mating part is always in a mating state with the third mating part, it is ensured that the trigger shaft can stably transmit power to the tool holder throughout the entire process of sharpening and retracting the pen. Problems such as abnormal rotation of the tool holder or failure to retract the pen due to loosening or disengagement will not occur, thus ensuring the continuity and stability of the pen sharpening and retracting functions.

[0023] In this invention, when a pencil enters the pencil sharpening inlet from the pencil inlet / outlet opening, it drives the rotating rod and its trigger block to rotate. Since the movement path of the trigger rod intersects with the movement path of the trigger block, the trigger block pushes the trigger rod to move during rotation. The control component is located on the movement path of the trigger rod, so the control component can be precisely triggered to make the drive motor rotate forward, thereby realizing automatic pencil feeding and automatic pencil sharpening.

[0024] In this invention, the mechanical sensing method, in which the pencil rotates when it enters the pencil sharpening inlet, causing the rotating rod and its trigger block to rotate, is less affected by environmental factors and has higher reliability compared to some electronic sensing methods.

[0025] In this invention, when the trigger rod moves along its axial direction under the action of the pen-feeding sensing mechanism, it accurately triggers the forward rotation button, thereby starting the drive motor to rotate forward for pen sharpening. This minimizes the possibility of abnormal forward rotation starting of the drive motor due to signal interference or misoperation, thus improving the reliability of the pen sharpening process. The switching component can rotate the switch housing according to the state or movement of the trigger shaft, thereby changing the position of the switch and disengaging the forward rotation button from the trigger rod. This allows the drive motor to switch from forward to reverse rotation, completing the pen retraction function and achieving seamless integration of pen sharpening and retraction.

[0026] In this invention, the mating teeth at the end of the trigger shaft away from the tool holder engage with the second switching gear. When the pen refill protrudes from the tool holder and pushes the trigger shaft to engage its mating teeth with the second switching gear, the trigger shaft can drive the second switching gear, the gear mounting shaft, and the first switching gear to rotate, thereby converting the rotational motion into the linear motion of the switching rack. Finally, the switching rack drives the switch housing and the switch to rotate, realizing the conversion from the linear motion of the trigger shaft to the rotational motion of the switch housing.

[0027] In this invention, the starting component includes a pencil-feeding detection mechanism disposed within the pencil case. This mechanism can detect in real time whether a pencil is entering the pencil sharpening inlet. When a pencil enters, the detection mechanism quickly senses this change and, in conjunction with the start switch, automatically triggers the start switch to start the drive motor, thereby initiating the pencil feeding and sharpening process. When sharpening is complete and the pencil is removed, or when no pencil enters, the detection mechanism no longer detects a pencil feeding signal, and the drive motor automatically stops operating. This design achieves automated control of the pencil sharpening process, eliminating the need for manual operation of the drive motor by the user, greatly improving convenience and efficiency.

[0028] In this invention, the motor reverses by combining the force output by the motor with the cooperation between the trigger shaft and the switching assembly. After the retraction is complete and the motor stops outputting force, the reset pin and the reset spring provide a stable reset force for the switching rack. Pulling the switching rack back to the initial position along the original path allows the switch to be accurately reset to the corresponding control position, ensuring that the next switching action can be performed precisely and reliably.

[0029] In this invention, the reset rod in the reset mechanism is connected to the trigger shaft, and the reset switch works with the reset rod to push the trigger shaft toward the tool holder. After the electric pencil sharpener completes operations such as sharpening or retracting the pencil, the user triggers the reset switch to make the reset rod drive the trigger shaft back to the initial position, preparing for the next normal operation.

[0030] In this invention, when the adjustment switch drives the adjustment knob to rotate, the inclined contact surface will move relative to the gear mounting shaft. Due to the special design of the inclined contact surface, the gear mounting shaft can move precisely along its own axial direction, thereby achieving precise adjustment of the position of the second switching gear; thereby changing the meshing position of the second switching gear and the mating teeth to control the length of movement required by the trigger shaft, so as to accurately determine the length of the pencil lead protruding from the blade holder, thus enabling this invention to adjust the thickness of the pencil cut. Attached Figure Description

[0031] Figure 1 This is a structural diagram of the present invention.

[0032] Figure 2 for Figure 1 Cross-sectional view.

[0033] Figure 3 for Figure 1 Structural diagram without tool holder cover.

[0034] Figure 4 This is a cross-sectional view of the pen case.

[0035] Figure 5 This is a structural diagram of the first area inside the pen box.

[0036] Figure 6 This is a structural diagram of the second area inside the pen box.

[0037] Figure 7 This is a structural diagram showing the connection between the vortex, the first rotating shaft, and the second rotating shaft.

[0038] Figure 8 This is a structural diagram showing the coordination of the tool holder, mounting base, control components, and switching components.

[0039] Figure 9 This is a cross-sectional view of the interface between the inversion trigger component, the switching component, and the tool holder.

[0040] Figure 10 This is a structural diagram of the trigger axis.

[0041] Figure 11 This is a structural diagram of the tool holder.

[0042] Figure 12 This is a structural diagram of a rotating gear.

[0043] Figure 13 This is a structural diagram of the connection between the start switch and the start lever.

[0044] Figure 14 This is a diagram showing the working structure of the switching component and the control component when the drive motor is rotating forward.

[0045] Figure 15 This is a diagram showing the interaction structure between the trigger rod and the control components when the drive motor rotates forward.

[0046] Figure 16 This is a diagram showing the working relationship between the switching component and the control component when the drive motor reverses.

[0047] Figure 17 for Figure 16 Structure diagram without mounting plate.

[0048] Figure 18 This is a diagram showing the interaction between the trigger lever and the control components when the drive motor reverses.

[0049] Figure 19 This is a structural diagram of the control component.

[0050] Figure 20 for Figure 19 Cross-sectional view.

[0051] Figure 21 This is a structural diagram of the adjustment knob.

[0052] Numbering on the map: 1. Mounting base; 2. Tool holder; 3. Drive motor; 4. Pencil feeding / ejection mechanism; 5. Control component; 6. Reverse trigger component; 7. Forward trigger component; 8. Switching component; 9. Starting component; 11. Transmission gear; 12. Rotary gear; 13. Mounting plate; 14. Assembly space; 15. Through opening; 16. Adjustment knob; 17. Adjustment switch; 18. Return spring; 21. Pencil sharpening inlet; 22. Pencil sharpening outlet; 23. Third mating part; 24. Connector 25. Pen holder in / out; 41. Scroll; 42. First rotating shaft; 43. Second rotating shaft; 44. Impeller; 45. Shaft; 46. Rubber wheel; 51. Switch housing; 52. Toggle switch; 53. Forward button; 54. Reverse button; 55. Reversing snap; 61. Trigger shaft; 71. Trigger rod; 72. Pen feed sensing mechanism; 81. Gear mounting shaft; 82. Switching rack; 83. First switching gear; 84. Second switching gear; 85. Reset Column; 91. Start switch; 92. Pen insertion detection mechanism; 100. Base plate; 101. Tool holder cover; 121. Second mating part; 161. Contact surface; 241. Connecting space; 251. Pen insertion / exit opening; 252. Partition; 253. First area; 254. Second area; 255. Mating opening; 256. Mating through hole; 257. Assembly bracket; 258. Mounting notch; 259. Mounting bracket; 411. Scroll rack; 511. Assembly plate; 512. Reversing spring; 551. Assembly part; 552. Assembly through hole; 553. First abutting part; 554. Second abutting part; 611. First mating part; 612. Mating tooth; 613. Limiting block; 614. Reset rod; 721. First rotating rod; 722. Second rotating rod; 723. Actuating block; 724. Contact block; 911. Switch housing; 912. Start button; 913. Spring; 921. Start rod; 922. Start contact block. Detailed Implementation

[0053] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are merely specific descriptions of the present invention, and their purpose is to enable those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limitations on the present invention.

[0054] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0055] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0056] like Figure 1-21 As shown, an electric pencil sharpener includes a mounting base 1, a blade holder 2 mounted on the mounting base 1, and a drive motor 3. The drive motor 3 drives the blade holder 2 to rotate. It also includes a control module that controls the operating state of the drive motor 3. The blade holder 2 has a sharpening inlet 21 for pencils to enter and a sharpening outlet 22 for pencil leads to emerge from the blade holder 2 at its two ends. A pencil inlet / outlet mechanism 4 is provided at the sharpening inlet 21. The pencil inlet / outlet mechanism 4 includes a volute 41 that cooperates with and rotates with the blade holder 2, and a first rotating shaft 42 and a second rotating shaft 43 that cooperate with the volute 41. Rotation of the volute 41 drives the first rotating shaft 42 and the second rotating shaft 43 to rotate. Forward rotation of the volute 41 causes both shafts to rotate inward to feed the pencil, while reverse rotation causes both shafts to rotate outward to expel the pencil. The control module includes a control component 5 that controls the rotation direction of the drive motor 3 and a reversing trigger component 6 that triggers the control component 5 to reverse the rotation of the drive motor 3. The reversing trigger component 6 is located at the sharpening outlet 22 and is positioned on the path where the pencil lead emerges from the blade holder 2. This design ensures that when the lead protrudes from the blade holder 2 to a certain position after sharpening, the reversing trigger component 6 is activated. This, in turn, causes the control component 5 to control the drive motor 3 to reverse, coordinating with the pencil feeding / unfeeding mechanism 4 to achieve the pencil retraction action. This maximizes the accuracy of the pencil retraction timing, minimizing problems caused by retraction being too early or too late, thus further improving ease of use and sharpening efficiency. Furthermore, since the reversing trigger component 6 only activates when the lead protrudes from the blade holder 2 to a certain extent, the triggering of the pencil retraction action in this invention is determined by the pencil's state. This allows for better adaptation to the sharpening needs of pencils in different states, avoiding problems such as insufficient sharpening of brand-new pencils or over-sharpening of already sharpened pencils.

[0057] In this invention, the vortex 41 is fixedly connected or detachably connected via a threaded connection or other means to cooperate with the tool holder 2; the first rotating shaft 42 and the second rotating shaft 43 are parallel to each other; a through hole is provided at the center of the vortex 41, which is located between the first rotating shaft 42 and the second rotating shaft 43 and is on the same straight line as the pencil sharpening inlet 21, through which the pencil enters the tool holder 2 for cutting. The surface of the vortex 41 is provided with a turbine-shaped, arc-shaped vortex rack 411, and impellers 44 that mesh with the vortex rack 411 are provided on the first rotating shaft 42 and the second rotating shaft 43; the impellers 44 are located at different ends of the first rotating shaft 42 and the second rotating shaft 43; the teeth of the impellers 44 cooperate with the vortex rack 411 and transmit the rotational torque of the vortex 41 to the impellers 44, thereby driving the impellers 44 and the first rotating shaft 42 and the second rotating shaft 43 on which the impellers 44 are located to rotate. This allows the drive motor 3 to drive the tool holder 2 and the vortex 41 to rotate forward, simultaneously driving the first rotating shaft 42 and the second rotating shaft 43 to rotate inward to achieve pen insertion; and the drive motor 3 to drive the tool holder 2 and the vortex 41 to rotate in reverse, driving the first rotating shaft 42 and the second rotating shaft 43 to rotate outward to achieve pen output.

[0058] In this invention, the automatic pen advance and retraction function is achieved by using mechanical structures such as vortex 41, rotating shaft and impeller 44. Compared with some methods that use sensors and circuit chips to achieve automatic pen advance and retraction, this design avoids complex circuit design and programming. The mechanical structure not only improves the stability and reliability of use, but also reduces the overall cost of this invention compared to high-cost components such as sensors and circuit chips.

[0059] In this invention, a transmission assembly is provided between the blade holder 2 and the drive motor 3. The transmission assembly includes a transmission gear 11 and a rotating gear 12 mounted on the mounting base 1. The transmission gear 11 engages with the drive motor 3 and the rotating gear 12. The reversing trigger assembly 6 includes a trigger shaft 61, which is movably mounted on the mounting base 1. The trigger shaft 61 passes through the rotating gear 12, and one end engages with the blade holder 2 and is located on the path where the pen tip protrudes from the blade holder 2. The trigger shaft 61 movably engages with the rotating gear 12 and the blade holder 2. The direction of movement of the trigger shaft 61 corresponds to its axial direction. The other end of the trigger shaft 61 triggers the control assembly 5 to reverse the drive motor 3. When the pencil is sharpened, the pen tip protrudes from the blade holder 2 and pushes the trigger shaft 61 to move along its axial direction. The other end of the trigger shaft 61 accurately triggers the control assembly 5, thereby reversing the drive motor 3 and realizing the pen retraction action. This design can accurately capture the signal that the pencil sharpening is complete, so that this invention can trigger the drive motor 3 to reverse at the appropriate time, avoiding problems such as over-sharpening or poor pen retraction caused by inaccurate triggering timing.

[0060] In this embodiment, a drive gear is provided on the motor shaft of the drive motor 3, and the transmission gear 11 meshes with the drive gear and the rotating gear 12 to realize the transmission of the force of the drive motor 3.

[0061] In this invention, the trigger shaft 61 is provided with a first mating part 611 arranged along its axial direction, and the rotating gear 12 and the tool holder 2 are respectively provided with a second mating part 121 and a third mating part 23 that mate with the first mating part 611; the mating of the trigger shaft 61 with the rotating gear 12 and the tool holder 2 is achieved through the first mating part 611, the second mating part 121 and the third mating part 23; this allows the trigger shaft 61 to also function as a transmission shaft, reducing the need for an independent transmission shaft in the electric pencil sharpener, and simplifying the overall structure while ensuring the power transmission function; at the same time, this simple mechanical structure has high reliability and is not prone to failure.

[0062] In this invention, a through hole for the trigger shaft 61 to pass through is provided at the center point of the rotating gear 12, and the second mating part 121 is provided at this through hole. This design ensures that the mating position of the trigger shaft 61 and the rotating gear 12 is at the center of the rotating gear 12, so that power can be stably transmitted to the trigger shaft 61 when the rotating gear 12 rotates. A connecting part 24 is provided at the tool holder 2 corresponding to the sharpening outlet 22, and a connecting space 241 is provided inside the connecting part 24. The connecting space 241 communicates with the interior of the tool holder 2 through the sharpening outlet 22. The third mating part 23 is provided inside the connecting space 241. The provision of the connecting part 24 and the connecting space 241 makes the mating and power transmission between the trigger shaft 61 and the tool holder 2 more stable. The length of the active path of the trigger shaft 61 is less than the depth of the connecting space 241, and the first mating part 611 is always in a mating state with the third mating part 23; this ensures that the trigger shaft 61 can stably transmit power to the blade holder 2 throughout the entire process of sharpening and retracting the pen, and there will be no problems such as abnormal rotation of the blade holder 2 or failure to retract the pen due to loosening or disengagement of the mating, thus ensuring the continuity and stability of the pen sharpening and retracting functions.

[0063] In this embodiment, the axial direction of the trigger shaft 61 is consistent with that of the rotating gear 12, and the center points of the trigger shaft 61, the rotating gear 12, and the pencil sharpening outlet 22 are on the same straight line; thus, the transmission of the trigger shaft 61 is more stable. The length directions of the first mating part 611, the second mating part 121, and the third mating part 23 are consistent; the first mating part 611 is block-shaped, and both the second mating part 121 and the third mating part 23 are groove-shaped to match the first mating part 611; thus, a stable fit is achieved between the first mating part 611, the second mating part 121, and the third mating part 23.

[0064] In this utility model, the control module includes a forward rotation triggering component 7 for triggering the control component 5 to make the drive motor 3 rotate forward; the forward rotation triggering component 7 includes a trigger rod 71 movably mounted on the mounting base 1 and a pen feeding sensing mechanism 72 that drives the trigger rod 71 to trigger the control component 5; a pen feeding box 25 is provided at the pencil sharpening inlet 21, and the pen feeding mechanism 4 and the pen feeding sensing mechanism 72 are disposed inside the pen feeding box 25; the pen feeding box 25 is provided with a pen feeding opening 251 corresponding to the pencil sharpening inlet 21; the pen feeding sensing mechanism 72 includes a rotating rod located on the pencil feeding path and a touch block 723 fixedly disposed on the rotating rod; the pencil feeding and discharging causes the rotating rod and the touch block 723 on it to rotate; one end of the trigger rod 71 is located inside the pen feeding box 25, and the movement path of the trigger rod 71 intersects with the movement path of the touch block 723; the control component 5 is located on the movement path of the trigger rod 71. When a pencil enters the pencil sharpening inlet 21 through the pencil inlet 251, it will cause the rotating rod and the trigger block 723 on it to rotate. Since the movement path of the trigger rod 71 intersects with the movement path of the trigger block 723, the trigger block 723 will push the trigger rod 71 to move during the rotation. The control component 5 is located on the movement path of the trigger rod 71. In this way, the control component 5 can be precisely triggered to make the drive motor 3 rotate in the forward direction, thereby realizing automatic pencil feeding and automatic pencil sharpening.

[0065] In this embodiment, the rotating rod is rotatably mounted on the pencil case 25. When the pencil enters the pencil sharpening inlet 21, it drives the rotating rod and the trigger block 723 on it to rotate. This mechanical sensing method is less affected by environmental factors and has higher reliability compared to some electronic sensing methods.

[0066] In this embodiment, the rotating rod includes a first rotating rod 721 and a second rotating rod 722 symmetrically arranged. A trigger block 723 is fixedly mounted on either the first rotating rod 721 or the second rotating rod 722, corresponding to the trigger rod 71. Both the first rotating rod 721 and the second rotating rod 722 are equipped with gears, and these gears mesh with each other. This gear transmission method provides stable and reliable power transmission, thereby stably transmitting force to the trigger rod 71. A passage gap is provided between the first rotating rod 721 and the second rotating rod 722 to allow the pencil to pass through and rotate both rods. Preferably, both the first rotating rod 721 and the second rotating rod 722 are equipped with toothed contact blocks 724. The passage gap is located between the contact blocks 724, which further stabilize the pencil, allowing it to move in and out more stably, and transmitting force more stably to the first rotating rod 721 and the second rotating rod 722.

[0067] In this invention, the control component 5 includes a switch housing 51 rotatably mounted on the mounting base 1 and a switch 52 fixed inside the switch housing 51 and moving therewith. The switch 52 has a forward rotation button 53, the movement path of which intersects with the movement path of the trigger rod 71. The movement direction of the trigger rod 71 corresponds to its axial direction. The control module includes a switching component 8 that works with the trigger shaft 61 to rotate the switch housing 51. When the trigger rod 71 moves along its axial direction under the action of the pen-feeding sensing mechanism 72, it accurately triggers the forward rotation button 53, thereby starting the drive motor 3 to rotate forward for pen sharpening. This minimizes the risk of abnormal forward starting of the drive motor 3 due to signal interference or misoperation, improving the reliability of the pen sharpening process. The switching component 8 can rotate the switch housing 51 according to the state or movement of the trigger shaft 61, thereby changing the position of the switch 52, causing the forward rotation button 53 to disengage from the trigger rod 71, and switching the drive motor 3 from forward to reverse rotation to complete the pen retraction function, achieving seamless connection between pen sharpening and pen retraction functions.

[0068] In some other configurations, the switch 52 also includes a reverse button 54; a reversing snap fastener 55 is rotatably mounted inside the switch housing 51, the reversing snap fastener 55 including an assembly part 551 and an abutment part; the assembly part 551 has an axially oriented assembly through hole 552 at its center, and the switch housing 51 also has an assembly post that mates with the assembly through hole 552, thereby enabling the rotation of the reversing snap fastener 55; the abutment part includes a first abutment part 553 and a second abutment part 554, which are axially symmetrically arranged in the assembly part 551. The outer surface of the switch housing 51 is shown. The reverse button 54 is located on the movement path of the first abutment part 553. The forward button 53 is located on the movement path of the second abutment part 554, and the movement path of the second abutment part 554 intersects with the movement path of the trigger rod 71. An assembly plate 511 is fixedly connected inside the switch housing 51, and the first abutment part 553 is located between the assembly plate 511 and the reverse button 54. A reversing spring 512 is also provided inside the switch housing 51, and the two ends of the reversing spring 512 are respectively connected and cooperated with the first abutment part 553 and the assembly plate 511. By setting the forward and reverse buttons 54, precise commands for forward or reverse rotation can be given to the drive motor 3, minimizing the ambiguity of commands during the forward and reverse conversion process of the drive motor 3. Meanwhile, since the reversing spring 512, the reversing latch 55, and the mounting plate 511 are all located inside the switch housing 51, their coordination is not affected by the rotation of the switch housing 51. Through the coordination of the reversing latch 55 and the reversing spring 512, after the second abutment 554 disengages from the trigger rod 71 when the switch housing 51 rotates, the first abutment 553 triggers the reverse button 54 under the force of the reversing spring 512, thereby reversing the drive motor 3. Preferably, the angle between the first abutment 553 and the second abutment 554 facing the surface of the switch 52 is an obtuse angle; thus avoiding the simultaneous triggering of the forward and reverse buttons 54.

[0069] In this invention, the switching assembly 8 includes a switching gear, a gear mounting shaft 81, and a switching rack 82; a mounting plate 13 is fixedly mounted on the mounting base 1, and the switching rack 82 is movably mounted on the mounting plate 13; the gear mounting shaft 81 is rotatably mounted on the mounting base 1 and / or the mounting plate 13; the switching gear includes a first switching gear 83 and a second switching gear 84 mounted on the gear mounting shaft 81; the first switching gear 83 and the switching rack 82 mesh with each other; the trigger shaft 61 has a mating tooth 612 arranged circumferentially at one end away from the tool holder 2, and the second switching gear 84 is located on the movement path of the mating tooth 612; the trigger shaft 61 drives the gear mounting shaft 81 and the first switching gear 83 to rotate through the engagement of the mating tooth 612 and the second switching gear 84; the switching rack 82 is connected to the switch housing 51 and drives the switch housing 51 and the switching switch 52 to rotate. The mating teeth 612 at the end of the trigger shaft 61 away from the tool holder 2 engage with the second switching gear 84. When the pen refill protrudes from the tool holder 2, it pushes the trigger shaft 61 so that its mating teeth 612 mesh with the second switching gear 84. The trigger shaft 61 can then drive the second switching gear 84, the gear mounting shaft 81, and the first switching gear 83 to rotate, thereby converting the rotational motion into the linear motion of the switching rack 82. Finally, the switching rack 82 drives the switch housing 51 and the switching switch 52 to rotate, realizing the conversion from the linear motion of the trigger shaft 61 to the rotational motion of the switch housing 51.

[0070] In this embodiment, the switch housing 51 is connected to the mounting base 1 by a rotating shaft, thereby enabling the switch housing 51 to rotate under force.

[0071] In this utility model, the transmission gear 11 and the rotating gear 12 are assembled in the mounting base 1; the switching component 8 and the mounting plate 13 are assembled outside the mounting base 1 and are located on the side of the mounting base 1 away from the tool holder 2; the mounting base 1 is provided with an assembly space 14, which communicates with the through hole and connecting space 241 of the rotating gear 12, and the trigger shaft 61 is disposed in the assembly space 14; the mounting base 1 is also provided with an opening 15, allowing one end of the trigger shaft 61 with the mating teeth 612 to protrude from the assembly space 14 and engage with the second switching gear 84; the portion of the trigger shaft 61 located in the assembly space 14 is also provided with a limiting block 613 with a diameter larger than the inner diameter of the opening 15, thereby restricting the movement of the trigger shaft 61 by the setting of the limiting block 613, and preventing the first mating part 611 from disengaging from the third mating part 23.

[0072] In this invention, the control module includes a starting component 9, which comprises a start switch 91 and a pencil insertion detection mechanism 92. The pencil insertion detection mechanism 92 is disposed within the pencil case 25 to detect whether a pencil has been inserted and works in conjunction with the start switch 91 to control the start and stop states of the drive motor 3. The starting component 9 includes the pencil insertion detection mechanism 92 disposed within the pencil case 25. This mechanism can detect in real time whether a pencil has entered the pencil sharpening inlet 21. When a pencil enters, the pencil insertion detection mechanism 92 quickly senses this change and, in conjunction with the start switch 91, automatically triggers the start switch 91 to start the drive motor 3, thereby initiating the pencil insertion and sharpening process. When the pencil sharpening is complete and the pencil has been removed, or when no pencil has entered, the pencil insertion detection mechanism 92 no longer detects a pencil insertion signal, and the drive motor 3 automatically stops operating. This design achieves automated control of the pencil sharpening process, eliminating the need for manual operation of the drive motor 3 by the user, greatly improving the convenience and efficiency of use.

[0073] In this embodiment, the pencil insertion detection mechanism 92 includes an activation rod 921 and an activation contact 922. The activation contact 922 is movably mounted inside the pencil case 25. The activation switch 91 is fixedly mounted on the mounting base 1. The activation rod 921 is movably mounted on the mounting base 1, with its two ends pointing to the activation switch 91 and the activation contact 922, respectively. The movement path of the activation rod 921 corresponds to its axial direction. The movement path of the activation contact 922 intersects with the movement path of the activation rod 921 and the pencil insertion path. When the pencil enters the pencil, it drives the activation contact 922 to move, and the activation contact 922 drives the activation rod 921 to move towards the activation switch 91. This direct association design ensures that as long as a pencil enters, the activation contact 922 will produce a corresponding action, which can accurately convert the pencil insertion signal into the force of the activation rod 921 on the activation switch 91, thereby triggering the activation signal and ensuring the high accuracy of the pencil insertion detection. The start switch 91 includes a switch housing 911 and a start button 912 and a spring 913 disposed on the switch housing 911. One end of the spring 913 is connected to the switch housing 911, and the start button 912 is located at the angle between the spring 913 and the switch housing 911. The other end of the spring 913 is located on the movement path of the start lever 921. This structural design gives the start switch 91 stable triggering characteristics. When the start lever 921 moves toward the start switch 91 under the action of the start contact block 922 and presses the spring 913, the spring 913 will undergo elastic deformation, thereby stably pressing the start button 912 and triggering the device to start. When the pencil is retracted or there is no pencil in, the start contact block 922 is in the initial position and will not drive the start lever 921 to move. At the same time, the spring 913 can also drive the start lever 921 to reset, so that the start switch 91 will not be triggered, thus avoiding accidental start of the device when it is not in operation.

[0074] In this invention, the switching assembly 8 includes a reset post 85 and a reset spring; both the switching rack 82 and the mounting plate 13 are fixedly provided with reset posts 85, and the two ends of the reset spring respectively cooperate with the reset posts 85 on the switching rack 82 and the mounting plate 13. In this invention, the motor reverses through the force output by the motor combined with the cooperation between the trigger shaft 61 and the switching assembly 8; when the retraction is complete and the motor stops outputting force, the reset post 85 and the reset spring provide a stable reset force for the switching rack 82; pulling the switching rack 82 back to the initial position along the original path, so that the switching switch 52 is accurately reset to the corresponding control position, so that the next switching action can be performed accurately and reliably.

[0075] This invention includes a reset mechanism that drives the trigger shaft 61 to reset. The reset mechanism includes a reset rod 614 and a reset switch. The reset rod 614 is connected to the trigger shaft 61, and the reset switch cooperates with the reset rod 614 to push the trigger shaft 61 toward the tool holder 2. After the electric pencil sharpener completes operations such as sharpening or retracting the pencil, the user triggers the reset switch to return the reset rod 614 to the trigger shaft 61, preparing it for the next normal operation.

[0076] In this utility model, an adjustment mechanism is included, comprising an adjustment knob 16 for adjusting the position of the second switching gear 84 and an adjustment switch 17 for controlling the adjustment knob 16; both ends of the gear mounting shaft 81 are rotatably connected to the mounting base 1 and the mounting plate 13, respectively, and the gear mounting shaft 81 can move along its own axial direction; the adjustment knob 16 is rotatably mounted on the mounting plate 13; the adjustment switch 17 engages with the outer surface of the adjustment knob 16 and drives the adjustment knob 16 to rotate; one end of the gear mounting shaft 81 passes through the mounting plate 13, and the inner surface of the adjustment knob 16 is provided with an inclined contact surface 161 that engages with the end of the gear mounting shaft 81; a return spring 18 is also sleeved on the gear mounting shaft 81, and both ends of the return spring 18 abut against the surfaces of the mounting base 1 and the second switching gear 84 facing the mounting base 1, respectively; thus, the second switching gear 84 is reset after the adjustment knob 16 is reset. When the adjustment switch 17 rotates the adjustment knob 16, the inclined contact surface 161 will move relative to the gear mounting shaft 81. Due to the special design of the inclined contact surface 161, the gear mounting shaft 81 can move precisely along its own axial direction, thereby achieving precise adjustment of the position of the second switching gear 84; thereby changing the meshing position of the second switching gear 84 and the mating gear 612 to control the length of movement required by the trigger shaft 61, so as to accurately determine the length of the pencil lead protruding from the blade holder 2, thereby enabling this invention to adjust the thickness of the pencil cut.

[0077] This utility model includes a base plate 100 and a housing; the mounting base 1 is fixed on the base plate 100; the housing includes a tool holder cover 101 that surrounds the tool holder 2, the trigger rod 71 and the start rod 921, thereby protecting the three of them; one end of the tool holder cover 101 is fixedly connected to the mounting base 1, and the pen box 25 is fixed to the other end of the tool holder cover 101.

[0078] In this embodiment, the pen holder 25 has an internal space, which is divided into a first region 253 and a second region 254 by a partition 252. The second region 254 is located between the knife holder cover 101 and the first region 253. The vortex 41, the first rotating shaft 42 and the second rotating shaft 43 of the pen feeding mechanism 4 are located in the second region 254. The first rotating rod 721 and the second rotating rod 722 of the pen feeding sensing mechanism 72 are located in the first region 253. The activation contact block 922 is movably located in the second region 254. The pen inlet / outlet box 25 has a mating opening 255 on its surface facing the tool holder 2, allowing the end of the vortex plate 41 away from the first rotating shaft 42 and the second rotating shaft 43 to connect to the tool holder 2; the pen inlet / outlet opening 251 is located on the surface of the pen inlet / outlet box 25 away from the tool holder 2; the partition plate 252 has a mating through hole 256 that connects the first region 253 and the second region 254; the start contact block 922 is movably mounted on the partition plate 252 and is correspondingly set to the mating through hole 256; the pen inlet / outlet opening 251, the mating through hole 256, the mating opening 255 and the pen sharpening inlet 21 are correspondingly set and are on the same straight line. A mounting bracket 257 is provided in the second region 254. The mounting bracket 257 has an installation notch 258. A partition 252 is mounted on the mounting bracket 257 to close the installation notch 258 and form an installation space. The first rotating shaft 42 and the second rotating shaft 43 both include a shaft body 45. The two ends of the shaft body 45 are rotatably located in the installation space. A rubber wheel 46 is sleeved on the shaft body 45. The rubber wheel 46 increases the friction and stably drives the pencil to move in and out of the pencil. The impeller 44 is fixed on the shaft body 45. A mounting bracket 259 is provided on the surface of the partition 252 corresponding to the first region 253. The first rotating rod 721 and the second rotating rod 722 are rotatably mounted on the mounting bracket 259. A through hole 256 is located between the first rotating shaft 42 and the second rotating shaft 43, and between the first rotating rod 721 and the second rotating rod 722.

[0079] It is worth noting that the other technical solutions of this utility model are all existing technologies, and therefore will not be described in detail.

[0080] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An electric pencil sharpener, comprising a mounting base and a blade holder and a drive motor mounted on the mounting base, the drive motor driving the blade holder to rotate; further comprising a control module for controlling the operating state of the drive motor; characterized in that, The two ends of the pencil holder are respectively provided with a sharpening inlet for the pencil to enter the pencil holder and a sharpening outlet for the pencil lead to exit the pencil holder; The pencil sharpening inlet is equipped with a pencil feeding and discharging mechanism; the pencil feeding and discharging mechanism includes a vortex that cooperates with and rotates with the blade holder, and a first rotating shaft and a second rotating shaft that cooperate with the vortex; the surface of the vortex is provided with a vortex rack with a turbine-like distribution and arc-shaped segments, and the first rotating shaft and the second rotating shaft are provided with impellers that mesh with the vortex rack; the rotation of the vortex drives the first rotating shaft and the second rotating shaft to rotate, the clockwise rotation of the vortex drives the two shafts to rotate inward to feed the pencil, and the counterclockwise rotation of the vortex drives the two shafts to rotate outward to discharge the pencil; The control module includes a control component that controls the rotation direction of the drive motor and a reversing trigger component that triggers the control component to reverse the drive motor. The reversal trigger component is located at the pencil sharpening exit and on the active path where the pencil lead protrudes from the blade holder.

2. The electric pencil sharpener according to claim 1, characterized in that, A transmission assembly is provided between the tool holder and the drive motor. The transmission assembly includes a transmission gear and a rotary gear mounted on the mounting base. The transmission gear cooperates with the drive motor and the rotary gear. The reverse trigger assembly includes a trigger shaft that is movably mounted on a mounting base; the trigger shaft passes through a rotating gear, one end of which engages with the tool holder and is positioned on the active path where the pen tip protrudes from the tool holder; the trigger shaft movably engages with the rotating gear and the tool holder; the active direction of the trigger shaft corresponds to its axial direction; the other end of the trigger shaft triggers a control assembly to reverse the drive motor. The trigger shaft is provided with a first mating part arranged along its axial direction, and the rotating gear and the tool holder are respectively provided with a second mating part and a third mating part that mate with the first mating part.

3. An electric pencil sharpener according to claim 2, characterized in that, The rotating gear has a through hole at its center point for the trigger shaft to pass through, and the second mating part is located at the through hole; the tool holder has a connecting part at the sharpening pen outlet, and a connecting space is provided inside the connecting part, which communicates with the inside of the tool holder through the sharpening pen outlet; the third mating part is located inside the connecting space; the length of the trigger shaft's movement path is less than the depth of the connecting space, and the first mating part is always in a mating state with the third mating part.

4. An electric pencil sharpener according to claim 3, characterized in that, The control module includes a forward rotation triggering component for triggering the control component to make the drive motor rotate forward; the forward rotation triggering component includes a trigger rod that is movably mounted on the mounting base and a pen-feeding sensing mechanism that drives the trigger rod to trigger the control component; The pencil sharpening inlet is equipped with a pencil box, and the pencil feeding mechanism and the pencil feeding sensor are located inside the pencil box; the pencil box is equipped with a corresponding pencil feeding opening. The pencil feeding sensing mechanism includes a rotating rod located on the pencil feeding path and a trigger block fixedly mounted on the rotating rod; the pencil feeding and discharging causes the rotating rod and the trigger block to rotate; one end of the trigger rod is located inside the pencil box, and the movement path of the trigger rod intersects with the movement path of the trigger block; the control component is located on the movement path of the trigger rod.

5. An electric pencil sharpener according to claim 4, characterized in that, The control assembly includes a switch housing rotatably mounted on a mounting base and a toggle switch fixed inside the switch housing and moving therewith; the toggle switch is provided with a forward rotation button, the movement path of the forward rotation button intersects with the movement path of the trigger rod; the movement direction of the trigger rod corresponds to its axial direction; The control module includes a switching component that works with the trigger shaft to rotate the switch housing.

6. An electric pencil sharpener according to claim 5, characterized in that, The switching assembly includes a switching gear, a gear mounting shaft, and a switching rack; a mounting plate is fixedly mounted on the mounting base, and the switching rack is movably mounted on the mounting plate; the gear mounting shaft is rotatably mounted on the mounting base and / or the mounting plate; the switching gear includes a first switching gear and a second switching gear mounted on the gear mounting shaft; the first switching gear and the switching rack mesh with each other; a mating tooth is provided at the end of the trigger shaft away from the tool holder, which is circumferentially arranged, and the second switching gear is located on the active path of the mating tooth; the trigger shaft drives the gear mounting shaft and the first switching gear to rotate through the engagement of the mating tooth with the second switching gear; The switching rack is connected to the switch housing and drives the switch housing and the switching switch to rotate.

7. An electric pencil sharpener according to claim 6, characterized in that, The control module includes a start-up component, which includes a start-up switch and a pen-feeding detection mechanism; the pen-feeding detection mechanism is set inside the pen box to detect whether a pen is being fed in, and works with the start-up switch to control the start-stop state of the drive motor.

8. An electric pencil sharpener according to claim 7, characterized in that, The switching assembly includes a reset post and a reset spring; both the switching rack and the mounting plate are provided with reset posts, and the two ends of the reset spring cooperate with the reset posts on the switching rack and the mounting plate, respectively.

9. An electric pencil sharpener according to claim 8, characterized in that, The device includes a reset mechanism that drives the trigger shaft to reset. The reset mechanism includes a reset rod and a reset switch. The reset rod is connected to the trigger shaft, and the reset switch works in conjunction with the reset rod to push the trigger shaft toward the tool holder.

10. An electric pencil sharpener according to claim 6, characterized in that, The device includes an adjustment mechanism comprising an adjustment knob for adjusting the position of the second switching gear and an adjustment switch for controlling the adjustment knob. The two ends of the gear mounting shaft are rotatably connected to the mounting base and the mounting plate, respectively, and the gear mounting shaft is movable along its own axial direction. The adjustment knob is rotatably mounted on the mounting plate. The adjustment switch engages with the outer surface of the adjustment knob and drives the adjustment knob to rotate. One end of the gear mounting shaft passes through the mounting plate, and the inner surface of the adjustment knob is provided with an inclined contact surface that engages with the end of the gear mounting shaft. A return spring is also fitted on the gear mounting shaft, with both ends of the return spring abutting against the mounting base and the surface of the second switching gear facing the mounting base.

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