Pencil feeding mechanism and pencil sharpener

Abstract

The pencil feeding mechanism comprises a rolling wheel rotating disc, a rolling wheel assembly is movably installed on the rolling wheel rotating disc, a transmission part in transmission connection with the rolling wheel assembly is arranged on the rolling wheel rotating disc, and the rolling wheel assembly is provided with a clamping opening for a pencil to penetrate through. One side of the magnetic driven rotary table is in transmission connection with the roller rotary table, the other side of the magnetic driven rotary table is in magnetic connection with the magnetic driving rotary table, and the magnetic driving rotary table is stressed to rotate and drives the magnetic driven rotary table to rotate under the action of magnetic force; and the magnetic driving turntable and the magnetic driven turntable are matched to drive the roller turntable to rotate at a reduced speed.

Description

Technical Field

[0001] The present application relates to the technical field of pencil sharpeners, and more specifically to a pencil feeding mechanism and a pencil sharpener. Background Art

[0002] The pencil sharpener can sharpen pencils safely and quickly, and has become an essential tool for students to learn. The pencil sharpener generally includes a box body, a pen feeding mechanism and a pen sharpening mechanism. When sharpening a pencil, the pencil is passed through the pen feeding mechanism and enters the pen sharpening mechanism. After the pencil is in place, the pen feeding mechanism clamps it and automatically feeds the pencil, and then the pencil sharpening mechanism cuts the pencil tip. The existing pen feeding mechanism mainly includes a bracket, a rotating disk, a first rotating wheel and a second rotating wheel. The first rotating wheel and the second rotating wheel are respectively located on both sides of the rotating disk. The bracket is used to rotate and support the first rotating wheel and the second rotating wheel. A transmission structure is provided on one side of the rotating disk. The rotating disk is connected to the first rotating wheel and the second rotating wheel through the transmission structure, that is, the rotation of the rotating disk can drive the first rotating wheel and the second rotating wheel to rotate. The first rotating wheel and the second rotating wheel rotate and drive the pencil forward / backward in a clamping form. The pencil advances, that is, the pencil advances, and the pencil retreats, that is, the pencil retreats. Therefore, the pen feeding mechanism has two functions of pen advancement and pen retreat. In order to simplify the structure, the rotation of the pen feeding mechanism is generally driven by the rotation of the pen sharpening mechanism. At present, most of the fully automatic electric pencil sharpeners on the market use elastic parts to provide torque for sharpening. The torque of the elastic parts is inconsistent during the manufacturing process, and the provided pen feeding force has large deviations. During the light pen process, a large pen feeding force will cause the first rotating wheel and the second rotating wheel to be unable to stop rotating, and the pen feeding mechanism drives the pencil forward for sharpening. Or, because the pen feeding force is too small, the first rotating wheel and the second rotating wheel cannot effectively drive the pencil to reverse quickly when retracting the pencil. Therefore, this type of pencil sharpener generally has problems such as broken pencil cores, sharpened pencil edges, inflexible pen retraction, and loud noise.

[0003] The utility model patent with publication number: CN205130757U discloses an electric pencil sharpener movement, including a frame, a pen feeding mechanism, a knife holder, a knife body and an electric rotating mechanism. The pen feeding mechanism is fixedly mounted on the frame, the knife holder shaft is connected to the frame, a pencil sharpening hole is arranged on the knife holder, the knife body is fixedly arranged on the knife holder and extends into the pencil sharpening hole, the electric rotating mechanism includes a controller, a power supply, a motor, a reducer and a first switch, the controller is respectively connected to the power supply, the motor and the first switch, the motor is connected to the reducer, the reducer is connected to the knife holder, a metal ejector pin is arranged at the front of the pencil sharpening hole, the electric rotating mechanism also includes a second switch, the second switch includes a first wire and a second wire, the controller is connected to the reducer through the first wire, the controller is connected to the reducer through the second wire The wire is connected to the tool holder; when sharpening the pencil, the first switch is closed, the first wire and the second wire are not conductive, and the second switch is in an open state. At this time, the controller generates a forward switch signal to control the motor to rotate forward to drive the tool holder to rotate forward to sharpen the pencil. When the pencil sharpening is completed, the metal push pin is pushed by the pencil to contact the reducer. At this time, the first wire and the second wire are conductive through the connection between the reducer, the metal push pin and the tool holder, and the second switch is in a closed state. At the moment the second switch is closed, the controller generates a reverse switch signal, which controls the motor to rotate in the reverse direction. The motor drives the tool holder to rotate in the reverse direction to realize automatic retraction of the pencil, thereby improving the automation level of the entire machine. However, the pencil sharpener has problems such as complex transmission structure and high noise. Utility Model Content

[0004] The technical problem to be solved by the present application is to provide a pen feeding mechanism and a pencil sharpener. The pen feeding mechanism adopts a magnetic transmission structure to generate torque, and has the advantages of good deceleration effect, stable pen feeding, efficient transmission and low noise.

[0005] The present application provides a pen feeding mechanism, comprising a roller turntable, on which a roller assembly is movably mounted, a transmission part which is transmission-connected to the roller assembly is arranged on the roller turntable, the roller assembly is provided with a clamping opening for a pencil to be inserted, the roller turntable rotates to drive the roller assembly to rotate through the transmission part, and further comprises a magnetic active turntable and a magnetic driven turntable, one side of the magnetic driven turntable is transmission-connected to the roller turntable, the other side of the magnetic driven turntable is magnetically connected to the magnetic active turntable, the magnetic active turntable is rotated under force to drive the magnetic driven turntable to rotate through the action of magnetic force, and the magnetic active turntable and the magnetic driven turntable cooperate to drive the roller turntable to rotate at a reduced speed.

[0006] In the technical scheme, a pencil is inserted into the clamping opening of the roller assembly, and the pencil is clamped by the roller assembly. The roller assembly is movably mounted on the roller turntable. The roller assembly can movably adjust the size of the clamping opening according to the size of the inserted pencil, and is suitable for pencils of various shapes and diameters. The roller turntable is connected to the roller assembly through a transmission part. The roller turntable is rotated by force and can drive the roller assembly to rotate through the transmission part. The roller assembly rotates and drives the pencil forward / backward in the form of clamping. The forward movement of the pencil is the pen advance, and the backward movement of the pencil is the pen retreat. Therefore, the pen advance mechanism has two functions of pen advance and pen retreat. The pen advance mechanism also includes a magnetic active turntable and a magnetic driven turntable. The magnetic active turntable and the magnetic driven turntable are magnetically connected to generate torque. The magnetic active turntable is rotated by force and can drive the magnetic driven turntable to rotate through the action of magnetic force. The magnetic driven turntable is connected to the roller turntable by transmission. The magnetic active turntable and the magnetic driven turntable cooperate to generate a magnetic transmission with a deceleration effect, thereby driving the roller turntable to decelerate and rotate. The pencil sharpening mechanism cuts the pencil and drives the active magnetic turntable to rotate. The active magnetic turntable drives the driven magnetic turntable to rotate through the magnetic force, and the driven magnetic turntable drives the roller turntable to rotate. The power transmission sequence is the pencil sharpening mechanism, the active magnetic turntable, the driven magnetic turntable and the roller turntable. In this way, the active magnetic turntable and the driven magnetic turntable produce a speed difference, and the speed of the roller assembly will change to adapt to the pencil sharpening process. At the end of pencil sharpening, the tip of the pencil abuts against the pencil resistance block in the pencil sharpening mechanism to increase the rotation resistance, so that the active magnetic turntable and the driven magnetic turntable slip to cause idling, thereby limiting the pencil from continuing to advance. The magnetic cooperation between the active magnetic turntable and the driven magnetic turntable enables the pen-feeding mechanism to have a better deceleration effect, avoids the pen-feeding speed being too fast when sharpening, improves the pen-feeding stability, avoids the problems of the pen tip being too thick or the pencil core being broken, the pencil edge being sharpened and over-sharpening, and there is no hard contact between the active magnetic turntable and the driven magnetic turntable, so no noise is generated during the transmission process.

[0007] As an improvement, the magnetic driven turntable is provided with a first gear, and the roller turntable is provided with a first toothed ring that is transmission-connected to the first gear, and the first gear cooperates with the first toothed ring so that the magnetic driven turntable is transmission-connected to the roller turntable. In this technical solution, one side of the magnetic driven turntable is transmission-connected to the roller turntable, so that the magnetic driven turntable can drive the roller turntable to rotate. By providing a first gear on the side of the magnetic driven turntable, and providing a first toothed ring on the roller turntable, the first gear cooperates with the first toothed ring, and the magnetic driven turntable drives the roller turntable to rotate through the gear toothed ring structure. The transmission structure is simple and reliable, and the transmission efficiency is high.

[0008] As an improvement, a plurality of planetary gears are arranged between the first gear and the first gear ring, and the first gear and the first gear ring are both meshed with the planetary gears. In this technical solution, the first gear and the first gear ring are arranged to be linked by planetary gears, and the first gear drives the planetary gear to rotate along the first gear ring, thereby improving the transmission efficiency. The torque is increased by arranging planetary gears, and the advantages include compact structure and balanced transmission. With the cooperation of the magnetic active turntable and the magnetic driven turntable, the rotation of the planetary gear along the first gear ring is decelerated, and the magnetic driven turntable drives the roller turntable to rotate the flexible deceleration wheel through the planetary gear, so that the pen feeding mechanism has a better deceleration effect, avoids the pen feeding speed being too fast when sharpening the pen, improves the pen feeding stability, and avoids the problems of thick pen tip or broken pen core, sharpening pen edges and over-sharpening.

[0009] As an improvement, an elastic buckle is provided at the bottom of the roller turntable, and a buckle hole adapted to the elastic buckle is provided on the magnetic driven turntable, and the elastic buckle is connected to the buckle hole. In this technical solution, an elastic buckle is provided on the roller turntable, and a buckle hole is provided on the magnetic driven turntable, and the elastic buckle is connected to the buckle hole to lock the roller turntable and the magnetic driven turntable, which can prevent the roller turntable and the magnetic driven turntable from being separated up and down, and the way the elastic buckle is connected to the buckle hole will not limit the relative rotation of the roller turntable and the magnetic driven turntable, and the connection structure is simple and reliable.

[0010] As an improvement, the button hole and the first gear are both located at the center of the magnetic driven turntable, and the button hole passes through the first gear. In this technical solution, the button hole and the first gear are both set at the center of the magnetic driven turntable, and the button hole is set to pass through the first gear, so the structural distribution is more compact and reasonable, and the size of the magnetic driven turntable will not be increased.

[0011] As an improvement, the magnetic active turntable is equipped with a plurality of first magnetic parts, and the magnetic driven turntable is equipped with a plurality of second magnetic parts that magnetically cooperate with the first magnetic parts. In this technical solution, the first magnetic part is installed on the magnetic active turntable, and the second magnetic part is installed on the magnetic driven turntable. The magnetic active turntable and the magnetic driven turntable are magnetically connected through the first magnetic part and the second magnetic part. The structure is simple, the cost is low, and the transmission is efficient. In this solution, the first magnetic part and the second magnetic part are preferably magnets. One or more of the first magnetic part and the second magnetic part can be provided, and this application does not limit this.

[0012] As an improvement, the magnetic active turntable is provided with a first installation slot adapted to the first magnetic member, and the first magnetic member is installed in the first installation slot. In this technical solution, the first magnetic member is installed by providing the first installation slot on the magnetic active turntable, and the installation structure is simple and reliable.

[0013] As an improvement, the magnetic driven turntable is provided with a second mounting groove adapted to the second magnetic member, and the second magnetic member is installed in the second mounting groove. In this technical solution, the second magnetic member is installed by providing the second mounting groove on the magnetic driven turntable, and the installation structure is simple and reliable.

[0014] As an improvement, the transmission part is a second toothed ring arranged on the roller turntable, the second toothed ring is composed of a plurality of helical teeth, the roller assembly includes a first roller and a second roller, the first roller is provided with a second gear matched with the second toothed ring, the second roller is provided with a third gear matched with the second toothed ring, and the second gear and the third gear are both meshed with the second toothed ring. In the technical scheme, a second toothed ring is arranged on the roller turntable, the second toothed ring is composed of a plurality of helical teeth evenly distributed along the circumference, the second toothed ring is configured as a transmission part, by arranging a second gear on the first roller and a third gear on the second roller, the second gear and the third gear are both meshed with the second toothed ring, so that the roller turntable can drive the first roller and the second roller to rotate through the second toothed ring, the transmission structure is simple, and there is a gap between adjacent helical teeth, so that the first roller and the second roller rotate stably and are not easy to get stuck, thereby improving the transmission efficiency and the efficiency of pen advance and retreat.

[0015] The present application may also provide a pencil sharpener, comprising any one of the aforementioned pen feeding mechanisms. In the present technical solution, the pen feeding mechanism further comprises a first shell and a second shell, and the first shell and the second shell are covered to form a cavity for installing a roller turntable and a roller assembly, so that the roller turntable and the roller assembly are both installed between the first shell and the second shell, and the second shell, the magnetic driven turntable and the magnetic active turntable are arranged to be connected in sequence along the axial direction, and the connection structure is simple and the installation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a pen feeding mechanism of the present application.

[0017] Figure 2 This is an exploded view of a pen feeding mechanism of the present application.

[0018] Figure 3 This is a schematic diagram of the connection structure between the roller turntable and the planetary gear in this application.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the magnetic driven turntable in this application.

[0020] As shown in the figure: 1. roller turntable; 11. transmission part; 12. first gear ring; 13. elastic buckle; 2. first roller; 21. second gear; 3. second roller; 31. third gear; 4. magnetic active turntable; 41. first magnetic part; 42. first mounting slot; 5. magnetic driven turntable; 51. first gear; 52. buckle hole; 53. second magnetic part; 54. second mounting slot; 6. planetary gear; 7. first shell; 8. second shell. DETAILED DESCRIPTION

[0021] In order to better understand the present application, a more detailed description of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numerals refer to the same elements.

[0022] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0023] It should also be understood that the terms “comprises,” “including,” “has,” “contains,” and “comprising,” when used in this specification, indicate the presence of the described features, integers, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or combinations thereof.

[0024] like Figures 1 to 4 As shown, the present application discloses a pen feeding mechanism, including a roller turntable 1, on which a roller assembly is movably mounted, and a transmission part 11 which is transmission-connected to the roller assembly is provided on the roller turntable 1, and the roller assembly includes a first roller 2 and a second roller 3. In the present scheme, the number of rollers in the roller assembly can be two or three, and the first and second should not be understood as limiting the number of rollers. A clamping opening for a pencil to pass through is formed between the first roller 2 and the second roller 3. The roller turntable 1 rotates to drive the first roller 2 and the second roller 3 to rotate through the transmission part 11. The pencil is inserted into the clamping opening between the first roller 2 and the second roller 3, and the pencil passes through the first roller 2 and The second roller 3 cooperates to clamp the pencil, and the first roller 2 and the second roller 3 are movably installed on the roller turntable 1. The first roller 2 and the second roller 3 can movably adjust the size of the clamping opening according to the size of the inserted pencil, so as to be suitable for pencils of various shapes and diameters. The roller turntable 1 is connected to the first roller 2 and the second roller 3 through the transmission part 11. The roller turntable 1 is driven to rotate by the force and can drive the first roller 2 and the second roller 3 to rotate through the transmission part 11. The first roller 2 and the second roller 3 rotate and drive the pencil forward / backward in the form of clamping. The pencil is advanced when it is advanced, and the pencil is retracted when it is retracted. Therefore, the pen-feeding mechanism has two functions of pen-feeding and pen-retracting.

[0025] The invention also includes a magnetic active turntable 4 and a magnetic driven turntable 5. One side of the magnetic driven turntable 5 is transmission-connected to the roller turntable 1, and the other side of the magnetic driven turntable 5 is magnetically connected to the magnetic active turntable 4. The magnetic active turntable 4 is rotated under force and drives the magnetic driven turntable 5 to rotate through the action of magnetic force. The magnetic active turntable 4 and the magnetic driven turntable 5 cooperate to drive the roller turntable 1 to rotate at a reduced speed. The pen feeding mechanism also includes a magnetic active turntable 4 and a magnetic driven turntable 5. The magnetic active turntable 4 and the magnetic driven turntable 5 are magnetically connected to generate torque. The magnetic active turntable 4 is rotated under force and can drive the magnetic driven turntable 5 to rotate through the action of magnetic force. The magnetic driven turntable 5 is transmission-connected to the roller turntable 1. The magnetic active turntable 4 and the magnetic driven turntable 5 cooperate to generate a magnetic transmission with a deceleration effect, thereby driving the roller turntable 1 to rotate at a reduced speed. In the pencil sharpening state, the pencil passes through the clamping port and is inserted into the pencil sharpening mechanism. The pencil sharpening mechanism cuts the pencil and drives the magnetic active turntable 4 to rotate. The magnetic active turntable 4 The magnetic driven turntable 5 is driven to rotate by magnetic force, and the magnetic driven turntable 5 drives the roller turntable 1 to rotate. The power transmission order is the pencil sharpening mechanism, the magnetic active turntable 4, the magnetic driven turntable 5 and the roller turntable 1. In this way, the magnetic active turntable 4 and the magnetic driven turntable 5 produce a speed difference, then the speed of the first roller 2 and the second roller 3 will change, so as to adapt to the pencil sharpening process. At the end of pencil sharpening, the tip of the pencil abuts against the pencil resistance block in the pencil sharpening mechanism to increase the rotation resistance, so that the magnetic active turntable 4 and the magnetic driven turntable 5 slip to cause idling, thereby limiting the pencil from continuing to feed. The magnetic cooperation between the magnetic active turntable 4 and the magnetic driven turntable 5 makes the pen feeding mechanism have a better deceleration effect, avoids the pen feeding speed being too fast during pencil sharpening, improves the pen feeding stability, avoids the problems of the pen tip being too thick or the pencil breaking the pencil core, the pencil burrs and over-cutting, and there is no hard contact between the magnetic active turntable 4 and the magnetic driven turntable 5, so no noise is generated during the transmission process.

[0026] More specifically, Figure 2 and Figure 3 As shown, a first gear 51 is provided on the magnetic driven turntable 5, and a first toothed ring 12 is provided on the roller turntable 1 which is transmission-connected with the first gear 51. The first gear 51 cooperates with the first toothed ring 12 so that the magnetic driven turntable 5 is transmission-connected with the roller turntable 1. One side of the magnetic driven turntable 5 is transmission-connected with the roller turntable 1, so that the magnetic driven turntable 5 can drive the roller turntable 1 to rotate. By providing the first gear 51 on the side of the magnetic driven turntable 5 and providing the first toothed ring 12 on the roller turntable 1, the first gear 51 cooperates with the first toothed ring 12, and the magnetic driven turntable 5 drives the roller turntable 1 to rotate through the gear and toothed ring structure. The transmission structure is simple and reliable, and the transmission efficiency is high.

[0027] More specifically, Figure 2 and Figure 3As shown, a plurality of planetary gears 6 are arranged between the first gear 51 and the first gear ring 12, and the first gear 51 and the first gear ring 12 are both meshed with the planetary gear 6. The first gear 51 and the first gear ring 12 are arranged to be linked through the planetary gear 6, and the first gear 51 drives the planetary gear 6 to rotate along the first gear ring 12, thereby improving the transmission efficiency. The torque is increased by arranging the planetary gear 6, which has the advantages of compact structure and balanced transmission, etc. With the cooperation of the magnetic active turntable 4 and the magnetic driven turntable 5, the rotation of the planetary gear 6 along the first gear ring 12 is decelerated, and the magnetic driven turntable 5 drives the flexible reduction wheel of the roller turntable 1 to rotate through the planetary gear 6, so that the pen feeding mechanism has a better deceleration effect, avoids the pen feeding speed being too fast when sharpening the pen, improves the pen feeding stability, and avoids the problems of thick pen tip or broken pen core, sharpened pen edges and over-sharpening.

[0028] More specifically, Figures 2 to 4 As shown, an elastic buckle 13 is provided at the bottom of the roller turntable 1, and a buckle hole 52 adapted to the elastic buckle 13 is provided on the magnetic driven turntable 5, and the elastic buckle 13 is connected to the buckle hole 52. The elastic buckle 13 is provided on the roller turntable 1, and the buckle hole 52 is provided on the magnetic driven turntable 5. The elastic buckle 13 is connected to the buckle hole 52 so as to connect and lock the roller turntable 1 and the magnetic driven turntable 5, which can prevent the roller turntable 1 and the magnetic driven turntable 5 from detaching up and down, and the way in which the elastic buckle 13 is connected to the buckle hole 52 will not limit the relative rotation of the roller turntable 1 and the magnetic driven turntable 5, and the connection structure is simple and reliable.

[0029] More specifically, Figure 2 As shown, the buckle hole 52 and the first gear 51 are both located at the center of the magnetic driven turntable 5, and the buckle hole 52 passes through the first gear 51. The buckle hole 52 and the first gear 51 are both arranged at the center of the magnetic driven turntable 5, and the buckle hole 52 passes through the first gear 51. The structural distribution is more compact and reasonable, and the size of the magnetic driven turntable 5 will not be increased.

[0030] More specifically, Figure 2 and Figure 4 As shown, a plurality of first magnetic components 41 are installed on the magnetic active turntable 4, and a plurality of second magnetic components 53 magnetically matched with the first magnetic components 41 are installed on the magnetic driven turntable 5. The first magnetic component 41 is installed on the magnetic active turntable 4, and the second magnetic component 53 is installed on the magnetic driven turntable 5. The magnetic active turntable 4 and the magnetic driven turntable 5 are magnetically connected through the first magnetic component 41 and the second magnetic component 53. The structure is simple, the cost is low, and the transmission is efficient. In this solution, the first magnetic component 41 and the second magnetic component 53 are preferably magnets. One or more of the first magnetic component 41 and the second magnetic component 53 can be provided, and the present application does not limit this.

[0031] More specifically, Figure 2As shown, the magnetic active turntable 4 is provided with a first installation groove 42 adapted to the first magnetic member 41, and the first magnetic member 41 is installed in the first installation groove 42. By providing the first installation groove 42 on the magnetic active turntable 4 to install the first magnetic member 41, the installation structure is simple and reliable.

[0032] More specifically, Figure 4 As shown, the magnetic driven turntable 5 is provided with a second mounting groove 54 adapted to the second magnetic component 53, and the second magnetic component 53 is installed in the second mounting groove 54. By setting the second mounting groove 54 on the magnetic driven turntable 5 to install the second magnetic component 53, the installation structure is simple and reliable.

[0033] More specifically, Figure 2 and Figure 3 As shown, the transmission part 11 is a second gear ring arranged on the roller turntable 1, and the second gear ring is composed of a plurality of helical teeth. A second gear 21 adapted to the second gear ring is arranged on the first roller 2, and a third gear 31 adapted to the second gear ring is arranged on the second roller 3. The second gear 21 and the third gear 31 are both meshed with the second gear ring. A second gear ring is arranged on the roller turntable 1, and the second gear ring is composed of a plurality of helical teeth uniformly distributed along the circumferential direction. The second gear ring is configured as the transmission part 11. By arranging the second gear 21 on the first roller 2 and the third gear 31 on the second roller 3, the second gear 21 and the third gear 31 are both meshed with the second gear ring, so that the roller turntable 1 can drive the first roller 2 and the second roller 3 to rotate through the second gear ring. The transmission structure is simple, and there is a gap between adjacent helical teeth, so that the first roller 2 and the second roller 3 can rotate stably and not easily get stuck, thereby improving the transmission efficiency and the efficiency of advancing and retreating the pen.

[0034] like Figures 1 to 4 As shown, the present embodiment can also provide a pencil sharpener, comprising any one of the aforementioned pen feeding mechanisms, the pen feeding mechanism further comprising a first shell 7 and a second shell 8, the first shell 7 and the second shell 8 are covered to form a cavity for installing the roller turntable 1 and the roller assembly, so that the roller turntable 1 and the roller assembly are both installed between the first shell 7 and the second shell 8, and the second shell 8, the magnetic driven turntable 5 and the magnetic active turntable 4 are arranged to be connected in sequence along the axial direction, the connection structure is simple, and the installation is convenient.

[0035] The present application is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present application. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present application.

Claims

1. A pen feeding mechanism, comprising a roller turntable (1), a roller assembly being movably mounted on the roller turntable (1), a transmission part (11) being provided on the roller turntable (1) and being transmission-connected to the roller assembly, the roller assembly being provided with a clamping opening for a pencil to be inserted, the roller turntable (1) rotating drives the roller assembly to rotate through the transmission part (11), characterized in that: The invention also comprises a magnetic driving turntable (4) and a magnetic driven turntable (5), one side of the magnetic driven turntable (5) is drivingly connected to the roller turntable (1), and the other side of the magnetic driven turntable (5) is magnetically connected to the magnetic driving turntable (4), the magnetic driving turntable (4) is rotated by force to drive the magnetic driven turntable (5) to rotate through the action of magnetic force, and the magnetic driving turntable (4) and the magnetic driven turntable (5) cooperate to drive the roller turntable (1) to rotate at a reduced speed.

2. A pen feeding mechanism according to claim 1, characterized in that: The magnetic driven turntable (5) is provided with a first gear (51), and the roller turntable (1) is provided with a first gear ring (12) which is transmission-connected to the first gear (51); the first gear (51) cooperates with the first gear ring (12) so that the magnetic driven turntable (5) is transmission-connected to the roller turntable (1).

3. A pen feeding mechanism according to claim 2, characterized in that: A plurality of planetary gears (6) are arranged between the first gear (51) and the first gear ring (12), and both the first gear (51) and the first gear ring (12) are meshed with the planetary gears (6).

4. A pen feeding mechanism according to claim 2, characterized in that: The bottom of the roller turntable (1) is provided with an elastic buckle (13), the magnetic driven turntable (5) is provided with a buckle hole (52) adapted to the elastic buckle (13), and the elastic buckle (13) is connected to the buckle hole (52).

5. A pen feeding mechanism according to claim 4, characterized in that: The buckle hole (52) and the first gear (51) are both located at the center of the magnetic driven turntable (5), and the buckle hole (52) passes through the first gear (51).

6. A pen feeding mechanism according to claim 1, characterized in that: The magnetic active turntable (4) is provided with a plurality of first magnetic components (41), and the magnetic driven turntable (5) is provided with a plurality of second magnetic components (53) that are magnetically matched with the first magnetic components (41).

7. A pen feeding mechanism according to claim 5, characterized in that: The magnetic active turntable (4) is provided with a first installation groove (42) adapted to the first magnetic component (41), and the first magnetic component (41) is installed in the first installation groove (42).

8. A pen feeding mechanism according to claim 5, characterized in that: The magnetic driven turntable (5) is provided with a second installation groove (54) adapted to the second magnetic component (53), and the second magnetic component (53) is installed in the second installation groove (54).

9. A pen feeding mechanism according to claim 1, characterized in that: The transmission part (11) is a second toothed ring arranged on the roller turntable (1), the second toothed ring is composed of a plurality of helical teeth, the roller assembly comprises a first roller (2) and a second roller (3), the first roller (2) is provided with a second gear (21) adapted to the second toothed ring, the second roller (3) is provided with a third gear (31) adapted to the second toothed ring, and the second gear (21) and the third gear (31) are both meshed with the second toothed ring.

10. A pencil sharpener, characterized in that: It comprises a pen feeding mechanism as described in any one of claims 1-9.

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