Electric pencil sharpener

Abstract

The application discloses an electric pencil sharpener, which comprises a pencil feeding mechanism, a trigger mechanism and a forward-reverse rotation mechanism, and the pencil feeding mechanism is provided with a pencil holder and a pencil feeding rubber roller. The pencil holder is connected with the trigger mechanism. When the pencil holder is driven by a pencil feeding force to drive the trigger mechanism to move, the forward-reverse rotation mechanism is driven by the trigger mechanism to drive the pencil feeding rubber roller to rotate in a forward direction, so that the pencil feeding is realized. When the pencil holder is not driven by the pencil feeding force, the trigger mechanism is reset to drive the forward-reverse rotation mechanism to drive the pencil feeding rubber roller to rotate in a reverse direction, so that the pencil feeding is realized. Through the bidirectional rotation function of the pencil feeding rubber roller and the linkage of the trigger mechanism and the forward-reverse rotation mechanism, the automatic pencil feeding and pencil feeding functions are realized. The mechanical structure is adopted to replace the traditional control circuit and controller elements, the problem that the traditional electric pencil sharpener cannot process short pencils is solved, and the production cost is reduced.

Description

Technical Field

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

[0002] Early pencil sharpeners were primarily manual pencil sharpeners, which used angled blades within a frame to cut pencils. Users had to manually rotate the sharpener, resulting in inefficiency, inconvenience, and inconsistent sharpening quality. With societal development, people's demands for convenient learning and office supplies have increased. Traditional manual sharpening methods can no longer meet the need for fast and efficient sharpening, leading to the development of electric pencil sharpeners. Electric pencil sharpeners primarily use a motor-driven sharpening mechanism to automatically complete the sharpening process. While improving speed and efficiency, they still have shortcomings in sharpening quality and safety. The pencil feeding mechanism of electric pencil sharpeners typically relies on the length of the pencil barrel to trigger automatic feeding. When the pencil barrel is too short, the feeding mechanism cannot accurately determine the length, causing the short pencil to be over-push in, get stuck inside the sharpener, and malfunction. Furthermore, a stuck short pencil is difficult to remove, affecting the user experience and potentially damaging the sharpener.

[0003] To address the aforementioned issues, Chinese invention patent CN107160924B discloses a control method for a pencil sharpener. This method includes setting a first operating current, which is less than the operating current of the motor under high load during normal cutting, but greater than the operating current when the motor only drives the roller assembly to rotate without cutting. It also includes setting a minimum entry time, which is the time required for the motor to move the pencil from its entry point into the sharpener to its deepest point without cutting the pencil. The sharpener contains a control circuit that controls the motor's operation. In this solution, a monitoring device determines whether a pencil is inserted into the sharpener and sends a switch signal to a microcontroller. The microcontroller, combined with the current during motor operation, determines different pencil-cutting states. If the inserted pencil is too short, the end of the pencil completely enters the top surface of the casing before cutting is complete. In this case, the monitoring device 12 cannot detect the pencil and triggers a disconnect signal sent to the control circuit. The control circuit determines that the pencil is too short and controls the motor to reverse for 3 seconds to retract the pencil, thus solving the problem of traditional electric pencil sharpeners being unable to handle short pencils. However, this solution requires the addition of corresponding control circuits and controller components, which increases the production cost of electric pencil sharpeners. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide an electric pencil sharpener that achieves automatic pencil feeding and retraction through the bidirectional rotation function of the pencil feed roller and the linkage of the triggering mechanism and the forward and reverse rotation mechanism. The mechanical structure replaces the traditional control circuit and controller components, which solves the problem that traditional electric pencil sharpeners cannot handle short pencils and reduces production costs.

[0005] This application provides an electric pencil sharpener, including a pencil feeding mechanism. The pencil feeding mechanism is equipped with a pencil clamping rod and a pencil feeding roller, and also includes a triggering mechanism and a forward and reverse rotation mechanism that are linked together. The pencil clamping rod is connected to the triggering mechanism. When the pencil clamping rod is driven by the pencil feeding force to move the triggering mechanism, the forward and reverse rotation mechanism is driven by the triggering mechanism to rotate the pencil feeding roller in the forward direction to realize pencil feeding. When the pencil clamping rod is not subjected to the pencil feeding force, the triggering mechanism resets and causes the forward and reverse rotation mechanism to drive the pencil feeding roller to rotate in the reverse direction to realize pencil retraction.

[0006] In this technical solution, two pencil clamps are typically provided. These two clamps adjust the clamping size of the pencil by rotating closer together or further apart, ensuring the pencil remains stable during feeding. The feeding roller automatically feeds the pencil by rotating forward and automatically retracts it by rotating in the opposite direction. This bidirectional rotation function allows the pencil sharpener to flexibly control the pencil's entry and exit. By adding a trigger mechanism, when the clamps are subjected to feeding force, the trigger mechanism moves, which in turn triggers the forward and reverse rotation mechanism, driving the feeding roller to rotate forward for feeding. When the clamps are no longer subjected to feeding force, the trigger mechanism resets, driving the feeding roller to rotate in the opposite direction for retraction. There is a linkage between the pen clamp, the trigger mechanism, and the forward / reverse mechanism. The movement of the pen clamp is transmitted to the forward / reverse mechanism through the trigger mechanism, which in turn controls the rotation direction of the pen feed roller, realizing automated control of pen feeding and retraction. When a short pen is inserted, the pen clamp is not subjected to the pen feeding force, the trigger mechanism resets, and the forward / reverse mechanism drives the pen feed roller to rotate in the opposite direction, thus retracting the short pen. This avoids the short pen getting stuck inside the pen sharpener and solves the problem that traditional electric pen sharpeners cannot handle short pens. This design mainly relies on the linkage of mechanical structures to achieve its function, without relying on complex electronic control circuits and sensors, thus reducing production costs.

[0007] As an improvement, the pen feeding mechanism is equipped with a synchronizing element. The pen clamp is movably installed within the synchronizing element, and the end of the pen clamp passes through the synchronizing element and connects to the triggering mechanism. The pen clamp moves within the synchronizing element under the force of the pen feeding action, thereby driving the triggering mechanism to move up and down. In this technical solution, the function of the synchronizing element is to ensure that the two pen clamps remain synchronized and stable during movement. The synchronizing element provides a fixed moving space for the pen clamps, making their movement smoother and more controllable. The movement of the pen clamps can be directly transmitted to the triggering mechanism, thereby driving the triggering mechanism to move up and down. The up and down movement of the triggering mechanism further controls the action of the forward and reverse rotation mechanism, realizing the forward or reverse rotation of the pen feeding roller to complete the pen feeding or retraction operation.

[0008] As an improvement, the forward / reverse mechanism includes a slidable bidirectional worm gear. The bidirectional worm gear has a forward engagement section and a reverse engagement section. The bidirectional worm gear switches between engaging the forward or reverse engagement section with the pen feed roller via sliding. In this technical solution, the bidirectional worm gear has a forward engagement section and a reverse engagement section. The forward engagement section drives the pen feed roller to rotate forward, realizing the pen feeding function. The reverse engagement section drives the pen feed roller to rotate backward, realizing the pen retraction function. The bidirectional worm gear switches between engaging the forward or reverse engagement section with the pen feed roller via sliding. The sliding switching mechanism of the bidirectional worm gear, in conjunction with the triggering mechanism, achieves efficient mechanical linkage control, enabling rapid response to the movement of the pen clamp and rapid switching between pen feeding and retraction. The design of the bidirectional worm gear makes the forward / reverse mechanism compact, reducing the number and complexity of mechanical parts.

[0009] As an improvement, the forward and reverse mechanism includes a worm gear mounted on the pen feed roller. The worm gear engages with the forward meshing section of a bidirectional worm gear to rotate the pen feed roller in the forward direction, and engages with the reverse meshing section of the bidirectional worm gear to rotate the pen feed roller in the reverse direction. In this technical solution, the forward and reverse mechanism also includes a worm gear mounted on the pen feed roller, allowing the worm gear and the pen feed roller to rotate synchronously, ensuring effective power transmission. When the pen clamp is subjected to a pen feed force, a trigger mechanism drives the bidirectional worm gear to slide to the forward meshing section and engage with the worm gear, thus feeding the pen. When the pen clamp is no longer subjected to a pen feed force, the trigger mechanism resets, driving the bidirectional worm gear to slide to the reverse meshing section and engage with the worm gear, thus retracting the pen, improving the reliability of the mechanical system.

[0010] As an improvement, the forward and reverse mechanism includes a linkage rod, which is connected to a triggering mechanism to drive the bidirectional worm gear to slide up and down. In this technical solution, the movement of the triggering mechanism is transmitted to the bidirectional worm gear through the linkage rod, thereby realizing the up and down sliding of the bidirectional worm gear. The up and down sliding of the bidirectional worm gear allows its forward meshing section and reverse meshing section to switch and mesh with the worm gear, thereby realizing the forward and reverse rotation of the pen feed roller. Specifically, the linkage rod can be equipped with a stop seat adapted to the bidirectional worm gear. The stop seat abuts against the bottom of the bidirectional worm gear to drive the bidirectional worm gear to move upward, ensuring that the forward meshing section of the bidirectional worm gear can mesh with the worm gear to realize the forward rotation of the pen feed roller. The bidirectional worm gear can be connected by a spring to maintain contact with the stop seat. When the linkage rod moves downward, the bidirectional worm gear moves downward synchronously with the linkage rod through the spring, ensuring that the reverse meshing section of the bidirectional worm gear can mesh with the worm gear to realize the reverse rotation of the pen feed roller. The structure is simple and reliable.

[0011] As an improvement, a first gear is provided on the bidirectional worm gear, and a second gear meshing with the first gear is provided on the linkage rod. The linkage rod is connected to a motor, and the rotation of the linkage rod by the motor drives the bidirectional worm gear to drive the pen feed roller to rotate. In this technical solution, the second gear meshes with the first gear. Through this meshing relationship, the rotation of the linkage rod can be transmitted to the bidirectional worm gear, thereby driving the bidirectional worm gear to rotate. The motor is the power source for driving the linkage rod to rotate. The motor drives the linkage rod, which in turn drives the bidirectional worm gear to rotate, realizing the forward or reverse rotation of the pen feed roller. The combination of mechanical linkage and electrical control not only improves the efficiency of power transmission but also increases the automation level of the system.

[0012] As an improvement, the triggering mechanism includes a contact and a contact rod. The contact is fitted onto the contact rod and connected to the end of the pen clamp. A first reset elastic element is fitted onto the contact rod. When the pen clamp is not subjected to the force of pen insertion, the triggering mechanism resets through the first reset elastic element. In this technical solution, the contact is used to transmit the movement of the pen clamp. The end of the pen clamp is connected to the contact, so that the movement of the pen clamp can be directly transmitted to the contact, thereby driving the contact rod to move. The first reset elastic element (such as a spring) is fitted onto the contact rod to provide a reset force. When the pen clamp is not subjected to the force of pen insertion, the elastic force of the first reset elastic element resets the contact rod and the contact, restoring them to their initial state, thus improving the reliability of the mechanical system. More specifically, since the movement of the pen clamp subjected to the force of pen insertion is mainly lateral, the force on the triggering mechanism also comes from a lateral force. The contact is connected to a tension spring, which cooperates with the first reset elastic element to make the reset of the triggering mechanism more accurate and reliable.

[0013] As an improvement, the triggering mechanism also includes a stroke extender lever. Both the contact rod and the linkage rod are connected to the stroke extender lever. When the contact rod is subjected to force and moves up and down, it drives the linkage rod to slide up and down via the stroke extender lever. In this technical solution, the stroke extender lever connects the contact rod and the linkage rod, amplifying the movement range of the contact rod and thus driving the linkage rod to slide up and down. This mechanical amplification ensures a larger movement range of the linkage rod, achieving more precise control and thus more effectively driving the bidirectional worm gear to realize the forward or reverse rotation of the pen feed roller.

[0014] As an improvement, the touch rod has a first segment and a second segment. The contact element is fitted onto the first segment, and a second reset elastic element is installed between the contact element and the first segment. In this technical solution, the touch rod is designed as two segments, namely the first segment and the second segment, which makes the functional division of the touch rod clearer and facilitates the realization of different mechanical functions. The first segment and the second segment can be integrated or separate, and this application does not limit this. The contact element is directly fitted onto the first segment of the touch rod to receive the movement of the pen clamp and transmit it to the touch rod. The second reset elastic element (such as a spring) is installed between the contact element and the first segment to provide a reset force. The design of the second reset elastic element allows for a certain relative movement space between the contact element and the touch rod, allowing the contact element and the touch rod to have a certain degree of freedom during up and down movement, avoiding direct contact and interference, reducing resistance and wear during movement, and extending the service life of the components.

[0015] As an improvement, a mounting bracket is also included. One end of the extender lever is rotatably connected to the mounting bracket, and the other end of the extender lever is fitted with a kit adapted to the linkage rod. The kit engages with the linkage rod to drive the linkage rod to slide up and down. The contact rod is located between the two ends of the extender lever. In this technical solution, the mounting bracket provides a reliable rotational connection point for the extender lever, enabling it to be installed in a specific position and rotate stably. The mounting bracket provides structural support for the entire triggering mechanism, enhancing the overall stability of the system. The kit is installed at the other end of the extender lever, and engages with the linkage rod, allowing the movement of the extender lever to be directly transmitted to the linkage rod, realizing the up and down sliding of the linkage rod. The design of the kit makes the up and down sliding of the linkage rod more stable and precise. The contact rod is located between the two ends of the extender lever. This design allows the movement of the contact rod to be amplified by the leverage effect of the extender lever. The position design of the contact rod ensures the compactness and efficiency of the triggering mechanism. Attached Figure Description

[0016] Figure 1 This is a partial structural diagram of an electric pencil sharpener according to this application.

[0017] Figure 2 For this application Figure 1 A magnified view of a portion of point A in the middle.

[0018] Figure 3 This is a cross-sectional structural diagram of the contact and contact rod in this application.

[0019] The diagram shows: 1. Pen feeding mechanism; 11. Pen clamp; 12. Pen feeding roller; 13. Synchronizer; 2. Trigger mechanism; 21. Contact element; 22. Contact rod; 221. First rod segment; 222. Second rod segment; 23. First reset elastic element; 24. Extender lever; 25. Second reset elastic element; 26. Kit; 27. Tension spring; 3. Forward and reverse mechanism; 31. Bidirectional worm gear; 311. Forward engagement segment; 312. Reverse engagement segment; 313. First gear; 32. Worm gear; 33. Linkage rod; 331. Abutment seat; 332. Second gear; 4. Motor; 5. Mounting bracket. 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 3 As shown, this application discloses an electric pencil sharpener, including a pencil feeding mechanism 1. The pencil feeding mechanism 1 is equipped with a pencil clamping bar 11 and a pencil feeding roller 12. Generally, two pencil clamping bars 11 are provided. The two clamping bars 11 adjust the clamping size of the pencil by rotating closer or further apart, ensuring the pencil remains stable during the feeding process. The pencil feeding roller 12 achieves automatic pencil feeding by rotating forward and automatic pencil retraction by rotating in reverse. This bidirectional rotation function allows the pencil sharpener to flexibly control the pencil's entry and exit. It also includes a triggering mechanism 2 and a forward / reverse mechanism 3, which are linked together. The pencil clamping bar 11 is connected to the triggering mechanism 2. When the pencil clamping bar 11 is subjected to a pencil feeding force, the triggering mechanism 2 moves. This movement triggers the forward / reverse mechanism 3, thereby driving the pencil feeding roller 12 to rotate forward, achieving pencil feeding. When the pen gripper 11 is not subjected to the force of the pen feed, the trigger mechanism 2 resets, driving the pen feed roller 12 to rotate in the opposite direction, thus retracting the pen. There is a linkage between the pen gripper 11, the trigger mechanism 2, and the forward / reverse mechanism 3. The movement of the pen gripper 11 is transmitted to the forward / reverse mechanism 3 through the trigger mechanism 2, thereby controlling the rotation direction of the pen feed roller 12. This achieves automated control of pen feed and retraction. When a short pen is inserted, the pen gripper 11 is not subjected to the force of the pen feed, the trigger mechanism 2 resets, and the forward / reverse mechanism 3 drives the pen feed roller 12 to rotate in the opposite direction, retracting the short pen. This prevents the short pen from getting stuck inside the pencil sharpener and solves the problem that traditional electric pencil sharpeners cannot handle short pens. This design mainly relies on the linkage of mechanical structures to achieve its function, without depending on complex electronic control circuits and sensors, thus reducing production costs. More specifically, such as Figure 1As shown, the pen feeding mechanism 1 is equipped with a synchronizing element 13. The pen clamping rod 11 is movably installed in the synchronizing element 13. The end of the pen clamping rod 11 passes through the synchronizing element 13 and connects to the triggering mechanism 2. The pen clamping rod 11 moves within the synchronizing element 13 under the force of pen feeding, thereby driving the triggering mechanism 2 to move up and down. The function of the synchronizing element 13 is to ensure that the two pen clamping rods 11 remain synchronized and stable during the movement. The synchronizing element 13 provides a fixed moving space for the pen clamping rod 11, making the movement of the pen clamping rod 11 more stable and controllable. The movement of the pen clamping rod 11 can be directly transmitted to the triggering mechanism 2, thereby driving the triggering mechanism 2 to move up and down. The up and down movement of the triggering mechanism 2 further controls the action of the forward and reverse rotation mechanism 3, realizing the forward or reverse rotation of the pen feeding roller 12, and completing the pen feeding or retraction operation.

[0025] More specifically, such as Figure 1 and Figure 2 As shown, the forward and reverse mechanism 3 includes a slidable bidirectional worm gear 31. The bidirectional worm gear 31 has a forward engagement section 311 and a reverse engagement section 312. The bidirectional worm gear 31 switches between the forward engagement section 311 and the reverse engagement section 312 to engage with the pen feed roller 12. The forward engagement section 311 is used to drive the pen feed roller 12 to rotate forward, realizing the pen feeding function. The reverse engagement section 312 is used to drive the pen feed roller 12 to rotate in the reverse direction, realizing the pen retraction function. The bidirectional worm gear 31 switches between the engagement of the forward engagement section 311 and the reverse engagement section 312 with the pen feed roller 12 by sliding. The sliding switching mechanism of the bidirectional worm gear 31 and the linkage with the triggering mechanism 2 realize efficient mechanical linkage control. It can quickly respond to the movement of the pen clamp 11 and realize the rapid switching of pen feeding and retraction. The design of the bidirectional worm gear 31 makes the forward and reverse mechanism 3 compact and reduces the number and complexity of mechanical parts.

[0026] More specifically, such as Figure 1 and Figure 2 As shown, the forward and reverse mechanism 3 includes a worm gear 32 mounted on the pen feed roller 12. The worm gear 32 engages with the forward meshing section 311 on the bidirectional worm gear 31 to make the pen feed roller 12 rotate in the forward direction. The worm gear 32 engages with the reverse meshing section 312 on the bidirectional worm gear 31 to make the pen feed roller 12 rotate in the reverse direction. The forward and reverse mechanism 3 also includes a worm gear 32 mounted on the pen feed roller 12, so that the worm gear 32 and the pen feed roller 12 rotate synchronously and cooperate, ensuring effective power transmission. When the pen clamp 11 is subjected to the pen feed force, the triggering mechanism 2 drives the bidirectional worm gear 31 to slide to the forward meshing section 311 and engage with the worm gear 32 to realize pen feed. When the pen clamp 11 is not subjected to the pen feed force, the triggering mechanism 2 resets and drives the bidirectional worm gear 31 to slide to the reverse meshing section 312 and engage with the worm gear 32 to realize pen retraction, which improves the reliability of the mechanical system.

[0027] More specifically, such as Figure 1 and Figure 2 As shown, the forward and reverse rotation mechanism 3 includes a linkage rod 33, which is connected to the triggering mechanism 2 to drive the bidirectional worm gear 31 to slide up and down. The movement of the triggering mechanism 2 is transmitted to the bidirectional worm gear 31 through the linkage rod 33, thereby realizing the up and down sliding of the bidirectional worm gear 31. The up and down sliding of the bidirectional worm gear 31 allows its forward meshing section 311 and reverse meshing section 312 to switch meshing with the worm gear 32, thereby realizing the forward and reverse rotation of the pen feed roller 12. Specifically, the linkage rod 33 can be provided with an abutment seat 331 adapted to the bidirectional worm gear 31. The bottom of the bidirectional worm gear 31 is abutted to drive the bidirectional worm gear 31 to move upward, ensuring that the forward meshing section 311 of the bidirectional worm gear 31 can mesh with the worm gear 32, realizing the forward rotation of the pen feed roller 12. The bidirectional worm gear 31 can be connected by a spring to maintain abutment with the abutment seat 331. When the linkage rod 33 moves downward, the bidirectional worm gear 31 moves downward synchronously with the linkage rod 33 through the spring, ensuring that the reverse meshing section 312 of the bidirectional worm gear 31 can mesh with the worm gear 32, realizing the reverse rotation of the pen feed roller 12. The structure is simple and reliable.

[0028] More specifically, such as Figure 1 and Figure 2 As shown, a first gear 313 is provided on the bidirectional worm gear 31, and a second gear 332 meshing with the first gear 313 is provided on the linkage rod 33. The linkage rod 33 is connected to a motor 4. The linkage rod 33 rotates through the motor 4 to drive the bidirectional worm gear 31 to drive the pen feed roller 12 to rotate. The second gear 332 meshes with the first gear 313. Through this meshing relationship, the rotation of the linkage rod 33 can be transmitted to the bidirectional worm gear 31, thereby driving the bidirectional worm gear 31 to rotate. The motor 4 is the power source for driving the linkage rod 33 to rotate. The motor 4 drives the linkage rod 33, which in turn drives the bidirectional worm gear 31 to rotate, realizing the forward or reverse rotation of the pen feed roller 12. The combination of mechanical linkage and electrical control not only improves the efficiency of power transmission, but also increases the degree of automation of the system.

[0029] More specifically, such as Figure 1 and Figure 3As shown, the triggering mechanism 2 includes a contact 21 and a contact rod 22. The contact 21 is fitted onto the contact rod 22 and is connected to the end of the pen clamp 11. A first reset elastic element 23 is fitted onto the contact rod 22. When the pen clamp 11 is not subjected to the pen-feeding force, the triggering mechanism 2 resets through the first reset elastic element 23. The contact 21 is used to transmit the movement of the pen clamp 11. The end of the pen clamp 11 is connected to the contact 21, so that the movement of the pen clamp 11 can be directly transmitted to the contact 21, thereby driving the contact rod 22 to move. The first reset elastic element 23 (such as a spring) is fitted onto the contact rod 22 to provide a reset force. When the pen barrel 11 is not subjected to the force of pen insertion, the elastic force of the first reset elastic element 23 causes the contact rod 22 and the contact element 21 to reset and return to the initial state, thus improving the reliability of the mechanical system. More specifically, since the movement of the pen barrel 11 under the force of pen insertion is mainly lateral, the force on the trigger mechanism 2 also comes from the lateral force. The contact element 21 is connected to a tension spring 27. One end of the tension spring 27 is connected to the contact element 21, and the other end of the tension spring 27 is connected to the inner wall of the electric pencil sharpener housing (not shown in the figure). The tension spring 27 cooperates with the first reset elastic element 23 to make the reset of the trigger mechanism 2 more accurate and reliable.

[0030] More specifically, such as Figure 1 As shown, the triggering mechanism 2 also includes a stroke extender lever 24. The contact rod 22 and the linkage rod 33 are both connected to the stroke extender lever 24. When the contact rod 22 is subjected to force and moves up and down, the contact rod 22 drives the linkage rod 33 to slide up and down through the stroke extender lever 24. The stroke extender lever 24 connects the contact rod 22 and the linkage rod 33 and is used to amplify the movement amplitude of the contact rod 22, thereby driving the linkage rod 33 to slide up and down. This mechanical amplification effect can ensure that the movement amplitude of the linkage rod 33 is larger, achieving more precise control, thereby more effectively driving the bidirectional worm gear 31 to realize the forward or reverse rotation of the pen feed roller 12.

[0031] More specifically, such as Figure 1 and Figure 3As shown, the contact rod 22 has a first rod segment 221 and a second rod segment 222. The contact member 21 is fitted onto the first rod segment 221. A second reset elastic member 25 is installed between the contact member 21 and the first rod segment 221. The contact rod 22 is designed as two segments, namely the first rod segment 221 and the second rod segment 222, which makes the functional division of the contact rod 22 more clear and facilitates the realization of different mechanical functions. The first rod segment 221 and the second rod segment 222 can be integrated or separate. This application does not limit this. The contact member 21 is directly fitted onto the contact rod 221. The first segment 221 of the 2 is used to receive the movement of the pen clamp 11 and transmit it to the contact rod 22. The second reset elastic element 25 (such as a spring) is installed between the contact 21 and the first segment 221 to provide a reset force. The design of the second reset elastic element 25 allows for a certain relative movement space between the contact 21 and the contact rod 22, allowing the contact 21 and the contact rod 22 to have a certain degree of freedom during up and down movement, avoiding direct contact and interference, reducing resistance and wear during movement, and extending the service life of the component.

[0032] More specifically, such as Figure 1 As shown, the system also includes a mounting bracket 5. One end of the extender lever 24 is rotatably connected to the mounting bracket 5, and the other end of the extender lever 24 is fitted with a kit 26 adapted to the linkage rod 33. The kit 26 is sleeved with the linkage rod 33 to drive the linkage rod 33 to slide up and down. The contact rod 22 is located between the two ends of the extender lever 24. The mounting bracket 5 provides a reliable rotation connection point for the extender lever 24, enabling it to be installed in a specific position and rotate stably. The mounting bracket 5 provides structural support for the entire triggering mechanism 2, enhancing the overall stability of the system. The kit 26 is installed at the other end of the extender lever 24 and is sleeved with the linkage rod 33, allowing the movement of the extender lever 24 to be directly transmitted to the linkage rod 33, realizing the up and down sliding of the linkage rod 33. The design of the kit 26 makes the up and down sliding of the linkage rod 33 more stable and precise. The contact rod 22 is located between the two ends of the extender lever 24. This design allows the movement of the contact rod 22 to be amplified by the leverage effect of the extender lever 24. The position design of the contact rod 22 ensures the compactness and efficiency of the triggering mechanism 2.

[0033] 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 pencil feeding mechanism (1), wherein the pencil feeding mechanism (1) is provided with a pencil clamping rod (11) and a pencil feeding roller (12), characterized in that, It also includes a triggering mechanism (2) and a forward / reverse mechanism (3) that work together. The pen clamp (11) is connected to the triggering mechanism (2). When the pen clamp (11) is driven by the pen-feeding force to move the triggering mechanism (2), the forward / reverse mechanism (3) is driven by the triggering mechanism (2) to rotate the pen-feeding roller (12) in the forward direction to achieve pen feeding. When the pen clamp (11) is not driven by the pen-feeding force, the triggering mechanism (2) resets and causes the forward / reverse mechanism (3) to rotate the pen-feeding roller (12) in the reverse direction to achieve pen retraction.

2. The electric pencil sharpener according to claim 1, characterized in that, The pen feeding mechanism (1) is equipped with a synchronizing element (13). The pen clamp (11) is movably installed in the synchronizing element (13). The end of the pen clamp (11) passes through the synchronizing element (13) and connects to the triggering mechanism (2). The pen clamp (11) moves within the synchronizing element (13) under the force of pen feeding, thereby driving the triggering mechanism (2) to move up and down.

3. An electric pencil sharpener according to claim 2, characterized in that, The forward and reverse mechanism (3) includes a slidable bidirectional worm gear (31), which has a forward engagement section (311) and a reverse engagement section (312). The bidirectional worm gear (31) engages with the pen feed roller (12) by sliding the forward engagement section (311) or the reverse engagement section (312).

4. An electric pencil sharpener according to claim 3, characterized in that, The forward and reverse mechanism (3) includes a worm gear (32) mounted on the pen feed roller (12). The worm gear (32) meshes with the forward meshing section (311) on the bidirectional worm (31) to make the pen feed roller (12) rotate in the forward direction. The worm gear (32) meshes with the reverse meshing section (312) on the bidirectional worm (31) to make the pen feed roller (12) rotate in the reverse direction.

5. An electric pencil sharpener according to claim 3, characterized in that, The forward and reverse mechanism (3) includes a linkage rod (33), which is connected to the triggering mechanism (2) to drive the bidirectional worm gear (31) to slide up and down.

6. An electric pencil sharpener according to claim 5, characterized in that, The bidirectional worm gear (31) is provided with a first gear (313), and the linkage rod (33) is provided with a second gear (332) that meshes with the first gear (313). The linkage rod (33) is connected to a motor (4). The linkage rod (33) rotates through the motor (4) to drive the bidirectional worm gear (31) to rotate the pen feed roller (12).

7. An electric pencil sharpener according to claim 5, characterized in that, The triggering mechanism (2) includes a contact (21) and a contact rod (22). The contact (21) is fitted onto the contact rod (22). The contact (21) is connected to the end of the pen clamp (11). A first reset elastic element (23) is fitted onto the contact rod (22). When the pen clamp (11) is not subjected to the pen-feeding force, the triggering mechanism (2) is reset by the first reset elastic element (23).

8. An electric pencil sharpener according to claim 7, characterized in that, The triggering mechanism (2) also includes a stroke extender lever (24). The contact rod (22) and the linkage rod (33) are both connected to the stroke extender lever (24). When the contact rod (22) is subjected to force and moves up and down, the contact rod (22) drives the linkage rod (33) to slide up and down through the stroke extender lever (24).

9. An electric pencil sharpener according to claim 7, characterized in that, The contact rod (22) is provided with a first rod segment (221) and a second rod segment (222). The contact element (21) is fitted onto the first rod segment (221). A second reset elastic element (25) is installed between the contact element (21) and the first rod segment (221).

10. An electric pencil sharpener according to claim 8, characterized in that, It also includes a mounting bracket (5), one end of the extended lever (24) is rotatably connected to the mounting bracket (5), the other end of the extended lever (24) is fitted with a kit (26) adapted to the linkage rod (33), the kit (26) is sleeved with the linkage rod (33) to drive the linkage rod (33) to slide up and down, and the contact rod (22) is located between the two ends of the extended lever (24).

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