Pen feeding mechanism and pen sharpener having the pen feeding mechanism

Abstract

This application discloses a pen feed mechanism and a pen sharpener having the same. The pen feed mechanism includes a drive device and a pen clamp device, the drive device is connected to the pen clamp device and can operate and drive the pen clamp device, the pen clamp device includes a holder, the holder is provided with three pen clamp roller assemblies, a triangular pen clamp area into which a pencil can be inserted is formed between the three pen clamp roller assemblies, one end of the pen clamp roller assembly is rotatably connected to the holder, the other end of the pen clamp roller assembly is slidingly connected to the holder, and a clamp assembly is provided between the movable end of the pen clamp roller assembly and the holder, the clamp assembly includes a clamp member movably connected to the holder and abutting the movable end of the pen clamp roller assembly, and a restoring elastic member supported between the clamp member and the holder. The pen feed mechanism and the pen sharpener having the same are suitable for pens of different shapes and diameters, making the pen feed mechanism highly versatile.

Description

Cross-reference to Related Applications

[0001] This application claims the priority of a Chinese invention patent with an application number of "202310898711.4", an application date of "July 21, 2023", and an invention title of "Pen Feeding Mechanism and Pencil Sharpener Having the Same", and the priority of a patent application with an application number of "202211328421.8", an application date of "October 27, 2022", and an invention title of "Pen Feeding Mechanism and Pencil Sharpener Having the Same".

Technical Field

[0002] This application relates to the technical field of stationery supplies, and more precisely, to a pen feeding mechanism and a pencil sharpener having the same.

Background Art

[0003] As a pencil sharpening tool, pencil sharpeners are loved by students. A pencil sharpener includes a pen feeding mechanism and a pencil sharpening mechanism. When sharpening a pen, the pencil is inserted through the pen feeding mechanism into the pencil sharpening mechanism. After the pencil is inserted to an appropriate position, it is clamped by the pen feeding mechanism, and then the pencil sharpening mechanism sharpens the tip of the pencil. After sharpening, the pen feeding mechanism can further eject the pencil from the pencil sharpener.

[0004] The invention patent with the patent announcement number CN215474153U discloses a three-wheel pen feeding device for a pencil sharpener. The pen feeding device includes a holder, a rotating disk movably attached to the holder, and a clamp wheel assembly. A pen feeding hole for passing a pen is provided at the central part of the rotating disk. The clamp wheel assembly has three sets, and the three sets of clamp wheel assemblies are arranged in an equilateral triangle centered on the pen feeding hole. This pencil sharpener has uniform force and good stability during the sharpening process, can effectively reduce the phenomenon of core breakage, has less wear of the rubber wheel, normal sliding, and can extend the service life of the product. However, the clamp wheel assembly of this pen feeding device is fixed and cannot be suitable for pens with different shapes and different diameters, and the versatility of the pen feeding device is poor. [Overview of the Initiative]

[0005] The technical problem that this application aims to solve is to provide a pen feeding mechanism that is suitable for pens of different shapes and diameters and offers high versatility.

[0006] The present invention provides a pen feeding mechanism having the following structure, comprising a drive unit and a pen clamping device, wherein the drive unit is connected to the pen clamping device and can drive the pen clamping device, the pen clamping device includes a holder, the holder is provided with three pen clamp roller assemblies, and a triangular pen clamping area is formed between the three pen clamp roller assemblies into which a pencil can be inserted, wherein one end of a pen clamp roller assembly is rotatably connected to the holder, the other end of a pen clamp roller assembly is slidably connected to the holder, a clamping assembly is provided between the movable end of the pen clamp roller assembly and the holder, the clamping assembly includes a clamping member that is movably connected to the holder and abuts against the movable end of the pen clamp roller assembly, and a return elastic member supported between the clamping member and the holder.

[0007] Using the above structure, the pen feeding mechanism of this application has the following advantages compared to the prior art.

[0008] In the pen feeding mechanism of this application, one end of the pen clamp roller assembly is rotatably connected to the holder, and the other end of the pen clamp roller assembly is slidably connected to the holder. When pencils of different shapes and sizes are inserted into the triangular pen clamp area, the other end of the pen clamp roller assembly adjusts its position. A clamp assembly is provided between the movable end of the pen clamp roller assembly and the holder. The clamp member is movably connected to the holder and abuts against the movable end of the pen clamp roller assembly. A return elastic member is supported between the clamp member and the holder. When the other end of the pen clamp roller assembly moves outward, the clamp member applies elastic thrust to the other end of the pen clamp roller assembly, thereby keeping the pen clamp roller assembly in constant contact with the pencil.

[0009] As an improvement, the return elastic member is an elastic hoop, which covers the outside of the other ends of the three clamp members, and a synchronous member is rotatably connected to the holder. One end of the elastic hoop is connected to the holder, and the other end of the elastic hoop is connected to the synchronous member. When the elastic hoop is pressed by the clamp members and twisting occurs, it can rotate the synchronous member. Using this structure, the elastic hoop covers the outside of the other ends of the clamp members, ensuring the synchronization of the movement of the clamp members and preventing the movement of the pen clamp roller assembly from becoming eccentric.

[0010] As an improvement, the synchronous member is provided on the upper side of the clamp member, a sliding rail is provided at the position of the synchronous member corresponding to the clamp member, the lower end of the clamp member is hinged to the holder, and the upper end of the clamp member is slidably combined within the sliding rail. The synchronous member can rotate to drive the clamp member, and at the same time the upper end of the clamp member slides along the sliding rail. Using this structure, when pencils of different shapes and sizes are inserted into the triangular pen clamp area, the movable end of the pen clamp roller assembly is pressed and moves, pushing the clamp member to rotate, and the elastic hoop twists when subjected to force, thereby causing the synchronous member to rotate. The synchronous member rotates to drive the upper end of the clamp member to slide along the sliding rail, and at the same time the upper end of the clamp member 10 can be opened and closed with the lower end as the center, thereby ensuring that when sharpening a pen, the pen is always in the middle of the three pen clamp roller assemblies, making the pen sharpening more stable and eccentric.

[0011] As an improvement, the sliding direction of the sliding rail intersects the swinging direction of the clamp member. With this structure, even if the synchronous member rotates, it does not affect the rotation of the clamp member, resulting in a better cooperative effect.

[0012] As an improvement, the holder includes a top cover, the top cover is connected to the side of the holder closer to the synchronous member, the synchronous member is pivotally connected to the upper side of the top cover, and an elastic hoop is provided between the top cover and the synchronous member, with one end of the elastic hoop connected to the top cover. Using this structure, the top cover can be provided to protect the internal structure and the reliability of the structure is higher.

[0013] As an improvement, the top cover has a first pen insertion hole above the triangular pen clamp area, and the orthographic projection of the first pen insertion hole covers a portion of the roller of the pen clamp roller assembly. The top cover also has a matching hole, and the other end of the clamp member passes through the matching hole and is fitted into the sliding rail. This structure is simple, reliable, and easy to assemble.

[0014] As an improvement, multiple positioning columns are provided on the side of the top cover closest to the synchronous member, and the synchronous member is provided with rotating rail holes that fit with the positioning columns. The ends of the positioning columns are combined within the rotating rail holes, and when the synchronous member is rotated by the elastic hoop, the positioning columns and the rotating rail holes slide relative to each other. Using this structure, the positioning columns can restrict the movement trajectory of the synchronous member, the synchronous member can accurately drive the clamp member, and the effect of synchronous rotation of the clamp member can be achieved.

[0015] As an improvement, a fourth pen insertion hole is provided in the center of the synchronization member, and the fourth pen insertion hole and the first pen insertion hole are aligned. The synchronization member is provided with an insertion hole, and one end of the elastic hoop is bent upward to form an insertion needle, which is inserted into the insertion hole. This structure provides good positioning for the pencil and facilitates assembly between the elastic hoop and the synchronization member.

[0016] As an improvement, a column is further provided on the side of the top cover closest to the synchronization member, and a ring is provided at one end of the elastic hoop, with the ring covering the outside of the column. Using this structure, the assembly structure between the top cover and the elastic hoop is simple, and assembly is easy.

[0017] As an improvement, the holder is provided with a first support wall and a second support wall, and the pen clamp roller assembly is provided between the first and second support walls. The pen clamp roller assembly includes a pivot shaft, one end of which is rotatably connected to the first support wall, and a sliding groove is provided in the second support wall, with the other end of the pivot shaft slidably fitted into the sliding groove. Using this structure, the assembly structure of the pen clamp roller assembly is simple and easy to assemble.

[0018] As an improvement, a housing chamber is provided in the second support wall, which communicates with a sliding groove, and the clamp member is movably mounted inside the housing chamber. One side of the clamp member abuts against the movable end of the pivot shaft, and the other end of the pivot shaft slides, pushing the clamp member outward. Using this structure, the assembly structure of the clamp member is simple and easy to assemble, the housing chamber can restrict the range of motion of the clamp member, and the movement of the clamp member can be made more stable.

[0019] As an improvement, one end of the clamping member is hinged to the side wall of the housing chamber, one side of the central part of the clamping member abuts against the other end of the pivot shaft, and the other end of the clamping member is connected to a return elastic member. With this structure, the contact area between the clamping member and the pivot shaft is large because the central part of the clamping member abuts against the other end of the pivot shaft, resulting in a good clamping effect.

[0020] As an improvement, one side of the central part of the clamping member is an arcuate surface, which contacts the other end of the pivot shaft. Using this structure, the arcuate surface of the clamping member contacts the other end of the pivot shaft, and by setting the radian of the arcuate surface, the clamping force of the clamping member can be effectively controlled, resulting in a good clamping effect.

[0021] As an improvement, the roller of the pen clamp roller assembly is mounted on a pivot shaft, and a gear is further mounted on the pivot shaft. The gear is connected to a drive unit, which rotates the gear, allowing the gear to rotate synchronously with the pivot shaft and the roller. Using this structure, the pivot shaft and roller are moved and rotated by the gear, resulting in a simple structure and good motion effect. As an improvement, the holder has a third support wall between the first and second support walls, and the third support wall is supported on the underside of the portion of the pivot shaft between the gear and the roller. Using this structure, the mounting of the pivot shaft is made more stable due to the action of the third support wall.

[0022] As an improvement, a first concave groove is provided on the upper surface of the third support wall, and the rotating shaft is embedded in the first concave groove. Using this structure, the installation of the rotating shaft can be reliable.

[0023] As an improvement, a bush is connected to one side of the gear, a shaft hole is provided in the central part of the gear, the shaft hole is coaxial with the through hole of the bush and communicates with each other, at least one regulating plane is provided on the side wall of the rotating shaft, and the shapes of the shaft hole of the gear and the through hole of the bush both match the cross-section of the rotating shaft. The gear and the bush cover the outside of the rotating shaft, one end of the bush abuts against the roller, and the bush is embedded in the first concave groove. Using this structure, the structure is simple and the assembly is easy.

[0024] As an improvement, a mounting hole is provided in the central part of the roller, a connecting sleeve is provided in the mounting hole, the shape of the through hole of the connecting sleeve matches the cross-sectional shape of the rotating shaft, and the connecting sleeve is tightly combined outside the rotating shaft and abuts against the outside of the bush. Using this structure, the roller mounting structure is simple and the assembly is easy.

[0025] As an improvement, a regulating sheet is provided outside the gear on the rotating shaft, and the regulating sheet is regulated outside the gear. Using this structure, the regulating sheet has a regulating effect on the gear.

[0026] As an improvement, a spherical head is provided at the end of the rotating shaft close to the gear, an embedding groove matching the spherical head is provided on the side wall of the first support wall, and the spherical head is rotationally connected in the embedding groove. Using this structure, a spherical head is provided at the end of the rotating shaft, the spherical head is combined with the embedding groove, and the movement is flexible.

[0027] As an improvement, a convex column is provided at the end of the rotating shaft close to the roller, the cross-section of the convex column is circular, and the convex column is installed by rolling on the groove bottom of the sliding groove. Using this structure, the convex column can rotate flexibly on the groove bottom of the sliding groove.

[0028] As an improvement, a regulating ring for inserting a pencil is provided at the central part of the holder. The regulating ring is connected to the second support wall and the third support wall. The regulating ring is disposed directly above the triangular pen clamping area, and the orthographic projection of the regulating ring covers a part of the roller. Using this structure, the regulating ring can position the pencil and make the pencil sharpener more stable.

[0029] As an improvement, the driving device includes a base. A driving member, a transmission assembly, and a toothed disk are provided in the base. The driving member is used to be connected to a driving source. The transmission assembly is connected between the driving member and the toothed disk. A plurality of movable teeth are provided on the toothed disk. The driving member can rotate the toothed disk through the transmission assembly. When the toothed disk rotates, the movable teeth can rotate the gear of the pen clamping roller assembly, thereby rotating the roller of the pen clamping roller assembly. Using this structure, the driving device has a simple structure, is easy to assemble, the movable teeth on the toothed disk move the gear so that the driving method and structure are simple and the driving effect is good.

[0030] As an improvement, a partition plate is provided at the central part of the base. The partition plate divides the chamber of the base into a first chamber and a second chamber. A connection hole is provided at the central part of the partition plate. The transmission assembly includes a first driving gear. The central part of the first driving gear is rotatably connected in the connection hole. A gear part is provided at one end of the first driving gear. The gear part projects into the first chamber. The toothed disk is accommodated in the first chamber. The gear part is in transmission connection with the toothed disk. A connection part is provided at the other end of the first driving gear. The connection part projects into the second chamber. The driving member is accommodated in the second chamber. The connection part is connected to the driving member. Using this structure, the transmission assembly has a simple structure and a good transmission effect. The partition plate divides the base chamber into a first chamber and a second chamber. The toothed disk is accommodated in the first chamber, and the driving member is accommodated in the second chamber, without affecting each other, and the structure is reliable.

[0031] As an improvement, the transmission assembly further includes a plurality of second drive gears, each housed in a first chamber and rotatably connected to a partition plate, with one side of the second drive gear meshing with the gear portion of the first drive gear, a flange provided on the edge of a toothed disc closest to the second drive gear, a ring gear provided on the inner wall of the flange, the toothed disc covering the outside of the second drive gear, and the other end of the second drive gear meshing with the ring gear. With this structure, the connection between the ring gear and the gear portion of the first drive gear is driven by the second drive gear, resulting in a simple structure and easy assembly.

[0032] As an improvement, a second pen insertion hole is provided in the center of the toothed disc, and a shaft hole is provided in the center of the first drive gear. The shaft hole and the second pen insertion hole are aligned, an elastic engagement portion is provided on the side of the toothed disc closest to the first drive gear, and a regulating step is provided inside the shaft hole. The elastic engagement portion is inserted into the shaft hole and engages with the regulating step, and the toothed disc and the first drive gear are rotatable relative to each other. Using this structure, the toothed disc and the first drive gear are assembled integrally via the elastic engagement portion and the regulating step, resulting in a more stable and reliable structure.

[0033] As an improvement, the drive member has a lid-like structure, a third pen insertion hole is provided in the center of the drive member, the third and second pen insertion holes are aligned, a convex ring is provided in the center of the drive member on the side closer to the connection part, the convex ring is embedded in the shaft hole of the first drive gear, and connecting teeth for connection to the drive source are provided on the inner wall of the convex ring. Using this structure, the structure is simple and easy to assemble.

[0034] As an improvement, multiple elastic sheets are provided on the outer circumferential wall of the connection portion of the first drive gear. The elastic sheets are housed between the convex ring and the side wall of the drive member, with projections at the ends of the elastic sheets. A second groove is provided on the inside of the side wall of the drive member to fit the projections, and the projections are embedded in the second groove. This structure simplifies the structure of the first drive gear and the drive member, simplifies assembly, and provides a good connection effect.

[0035] Another technical problem that this application seeks to solve is to provide a pen sharpener that includes a pen feeding mechanism suitable for pens of different shapes and diameters, and that offers high pen versatility.

[0036] The present invention provides a pen sharpener having the following structure, the pen sharpener including a housing, the housing containing a pen feeding mechanism and a pen sharpening mechanism having the above structure, the pen feeding mechanism being located above the pen sharpening mechanism and connected to the pen sharpening mechanism.

[0037] Using the above structure, the pen sharpener of this application has the following advantages compared to the prior art.

[0038] In the pen feeding mechanism of the pen sharpener of this application, one end of the pen clamp roller assembly is rotatably connected to a holder, and the other end of the pen clamp roller assembly is slidably connected to the holder. When pencils of different shapes and sizes are inserted into the triangular pen clamp area, the other end of the pen clamp roller assembly adjusts its position. A clamp assembly is provided between the movable end of the pen clamp roller assembly and the holder. The clamp member is movably connected to the holder and abuts against the movable end of the pen clamp roller assembly. A return elastic member is supported between the clamp member and the holder. When the other end of the pen clamp roller assembly moves outward, the clamp member applies elastic thrust to the other end of the pen clamp roller assembly, thereby keeping the pen clamp roller assembly in constant contact with the pencil. [Brief explanation of the drawing]

[0039] [Figure 1] This is a schematic perspective view of the pen feeding mechanism of this application. [Figure 2] This is a schematic diagram of the exploded structure of the pen clamping device of the pen feeding mechanism of this application. [Figure 3] This is a schematic diagram of a partially exploded structure of the pen clamping device of the pen feeding mechanism of this application. [Figure 4] This is a schematic diagram of the assembly structure of the pen clamp roller assembly and holder of the pen feeding mechanism of this application. [Figure 5] This is a schematic diagram of the assembly structure of the pen clamp roller assembly and holder of the pen feeding mechanism of this application, at a different angle. [Figure 6] This is a schematic diagram of the exploded structure of the pen clamp roller assembly and holder of the pen feeding mechanism of this application. [Figure 7] This is a schematic diagram of the exploded structure of the pen clamp roller assembly of the pen feeding mechanism of this application. [Figure 8] This is a schematic perspective view of the drive mechanism for the pen feeding mechanism of this application. [Figure 9] This is a schematic diagram of the pen feeding mechanism drive unit of this application, viewed from a different angle. [Figure 10] This is a schematic diagram of a partially exploded structure of the drive unit for the pen feeding mechanism of this application. [Figure 11] This is a schematic perspective view of the first drive gear of the pen feeding mechanism of this application. [Figure 12] This is a schematic diagram of the exploded structure of the pen feeding mechanism drive unit of this application. [Figure 13] This is a schematic diagram of a partial assembly structure of the drive unit for the pen feeding mechanism of this application. [Modes for carrying out the invention]

[0040] To better understand this application, various aspects of this application will be described in more detail with reference to the drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and do not limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0041] In drawings, the thickness, dimensions, and shape of objects are often slightly enlarged for ease of explanation. The drawings are merely examples and are not strictly proportional.

[0042] Furthermore, it should be understood that the terms “contain,” “include,” “have,” “equip,” “contain,” and “include,” as used herein, describe the presence of features, wholes, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, and / or combinations thereof.

[0043] As shown in Figure 1, this application discloses a pen feeding mechanism which includes a drive unit and a pen clamping device, wherein the drive unit is connected to the pen clamping device and the drive unit is capable of operating the pen clamping device.

[0044] As shown in Figures 2 to 7, the pen clamp device includes a holder 1, an upper cover 2, and a synchronization member 3. The holder 1 is provided with three pen clamp roller assemblies, all of which have the same structure and mounting structure, and a triangular pen clamp area 4 into which a pencil can be inserted is formed between the three pen clamp roller assemblies.

[0045] One end of the pen clamp roller assembly is rotatably connected to the holder 1, and the other end is slidably connected to the holder 1. A clamp assembly is provided between the movable end of the pen clamp roller assembly and the holder 1. The clamp assembly includes a clamp member 10 and a return elastic member. The clamp member 10 is movably connected to the holder 1 and abuts against the movable end of the pen clamp roller assembly, and the return elastic member is supported between the clamp member 10 and the holder 1. Using the above structure, the pen feeding mechanism of this application has the following advantages.

[0046] In the pen feeding mechanism of this application, one end of the pen clamp roller assembly is rotatably connected to the holder, and the other end of the pen clamp roller assembly is slidably connected to the holder 1. Therefore, when pencils of different shapes and sizes are inserted into the triangular pen clamp area, the other end of the pen clamp roller assembly adjusts its position. A clamp assembly is provided between the movable end of the pen clamp roller assembly and the holder 1. The clamp member 10 is movably connected to the holder 1 and abuts against the movable end of the pen clamp roller assembly. A return elastic member is supported between the clamp member 10 and the holder 1. When the other end of the pen clamp roller assembly moves outward, the clamp member 10 applies elastic thrust to the other end of the pen clamp roller assembly, thereby keeping the pen clamp roller assembly in constant contact with the pencil.

[0047] In one embodiment, the return elastic member is an elastic hoop 11, which covers the outside of the other ends of the three clamp members 10, and a synchronization member 3 is rotatably connected to the holder 1. One end of the elastic hoop 11 is connected to the holder 1, and the other end of the elastic hoop 11 is connected to the synchronization member 3. When the elastic hoop 11 is pressed by the clamp members 10 and twisting occurs, it can rotate the synchronization member 3.

[0048] This structure allows the elastic hoop 11 to be locked to the outside of the other end of the clamp member 10, ensuring the synchronization of the movement of the clamp member 10 and preventing the movement of the pen clamp roller assembly from becoming eccentric.

[0049] In one embodiment, as shown in Figures 2, 4, and 7, the pen clamp roller assembly includes a pivot shaft 5, a roller 6, and a gear 7. At least one regulating plane 501 is provided on the side wall of the pivot shaft 5, and in this particular embodiment, the cross-section of the pivot shaft 5 is rectangular. A circular regulating sheet 8 is provided on the side wall of one end of the pivot shaft 5. A bush 701 is connected to one side of the gear 7, and the bush 701 and the gear 7 are integrally molded, with an axle hole provided in the center of the gear 7, which is coaxial and in communication with the through hole of the bush 701. The shape of the axle hole and the shape of the through hole of the bush 701 both match the shape of the pivot shaft 5, and the gear 7 and bush 701 cover the outside of the pivot shaft 5, with the end face of the gear 7 in contact with the regulating sheet 8. A mounting hole is provided in the center of the roller 6, a connecting sleeve 9 is provided inside the mounting hole, and an embedded ring 901 is provided on the outer circumferential wall of the connecting sleeve 9. The roller 6 is made of rubber material, and the inner ring of the roller 6 is embedded in the embedded ring 901. The shape of the through hole in the connecting sleeve 9 matches the shape of the pivot shaft 5, the connecting sleeve 9 covers the outside of the pivot shaft 5 and fits tightly with the pivot shaft 5, and one end of the connecting sleeve 9 abuts against the end face of the bush 701.

[0050] In one embodiment, one side of the central part of the clamp member 10 is an arcuate surface 1001, which abuts against the other end of the pivot shaft 5. Using this structure, the arcuate surface 1001 of the clamp member 10 contacts the other end of the pivot shaft 5, and the clamping force of the clamp member 10 can be effectively controlled by setting the radian of the arcuate surface 1001, resulting in a good clamping effect.

[0051] In one embodiment, as shown in Figures 6 and 7, the holder 1 is provided with a first support wall 101, a second support wall 102, and a third support wall 103. A spherical head 502 is provided at the end of the pivot shaft 5 closest to the gear 7, and the spherical head 502 is provided on the outside of the regulating sheet 8. An embedded groove 104 that fits the spherical head 502 is provided in the side wall of the first support wall 101, and the spherical head 502 is rotatably connected within the embedded groove 104. The third support wall 103 is provided below the bush 701 on the pivot shaft 5, and a first recessed groove 105 is provided on the upper end surface of the third support wall 103, and the bush 701 is embedded within the first recessed groove 105. A sliding groove 106 is provided in the second support wall 102, and a protruding column 503 is provided at the end of the pivot shaft 5 closest to the roller 6. The cross-section of the protruding column 503 is circular, and the protruding column 503 is mounted to the bottom of the sliding groove 106 by rolling. When the pivot shaft 5 is subjected to force, the protruding column 503 can reciprocate and slide along the bottom of the sliding groove 106. Each pen clamp roller assembly is mounted to the holder 1 via the first support wall 101, the second support wall 102, and the third support wall 103, and the mounting structure is the same for all of them.

[0052] In one embodiment, a regulating ring 107 for inserting a pencil is provided in the center of the holder 1. The regulating ring 107 is connected to all of the second support walls 102 and third support walls 103 of the holder 1. The regulating ring 107 is placed directly above the triangular pen clamp area 4, and the orthographic projection of the regulating ring 107 covers a portion of the roller 6. The regulating ring 107 allows for the positioning of the pencil and makes the pen sharpening more stable.

[0053] In one embodiment, a clamp assembly is provided on the holder 1 near the convex column 503, and the clamp assembly includes a clamp member 10 and a return elastic member. A housing chamber 108 is provided in the second support wall 102, and both the upper and lower ends of the housing chamber 108 are open, and the housing chamber 108 communicates with a sliding groove 106, and the end of the convex column 503 protrudes into the housing chamber 108. The lower end of the clamp member 10 is hinged to the side wall of the housing chamber 108, and one side of the central part of the clamp member 10 abuts against the convex column 503. An arcuate surface 1001 is provided on the side of the central part of the clamp member 10 near the convex column 503, and the arcuate surface 1001 abuts against the outer wall of the convex column 503, and the convex ring 1301 slides outward, pushing the clamp member 10 so that it rotates around the connection point at the lower end of the clamp member 10.

[0054] In one embodiment, the top cover 2 is connected to the upper side of the holder 1 and covers the pen clamp roller assembly. A first pen insertion hole 201 is provided in the center of the top cover 2, which is located directly above the triangular pen clamp area 4, and the orthographic projection of the first pen insertion hole 201 covers a portion of the roller 6 of the pen clamp roller assembly. The top cover 2 is provided with a matching hole 202, and the upper end of the clamp member 10 is exposed outside the top cover 2 by passing through the matching hole 202, and the clamp member 10 can move within the matching hole 202. The return elastic member is an elastic hoop 11, which is locked outside the upper end of the clamp member 10.

[0055] This structure allows for the provision of an upper cover 2, which protects the internal structure and increases the reliability of the structure.

[0056] In one embodiment, as shown in Figures 2 and 3, a synchronization member 3 is provided on the top cover 2, and a fourth pen insertion hole 301 is provided in the center of the synchronization member 3, and the fourth pen insertion hole 301 and the first pen insertion hole 201 are aligned. A sliding rail 302 is provided on the synchronization member 3, one end of the clamp member 10 is hinged to the holder, and the other end of the clamp member 10 protrudes into the sliding rail 302, so that the clamp member 10 and the sliding rail 302 are slidably combined, and the synchronization member 3 can rotate to drive the clamp member 10, and at the same time the upper end of the clamp member 10 slides along the sliding rail 302. Using this structure, when pencils of different shapes and sizes are inserted into the triangular pen clamp area, the movable end of the pen clamp roller assembly is pressed and moves, and pushes the clamp member 10 to rotate, and the elastic hoop 11 twists when subjected to force, thereby causing the synchronization member 3 to rotate. The synchronous member 3 rotates to drive the upper end of the clamp member 10 to slide along the sliding rail 302, and at the same time, the lower end can be used to open and close the upper end of the clamp member 10, thereby ensuring that the pen is always in the center of the three pen clamp roller assembly when sharpening the pen, making the pen sharpening more stable and eccentric.

[0057] In one particular embodiment, the sliding rail 302 has a perforated structure. The elastic hoop 11 is provided in the space between the synchronization member 3 and the top cover 2. One end of the elastic hoop 11 is connected to the synchronization member 3, i.e., the synchronization member 3 is provided with an insertion hole 303, and one end of the elastic hoop 11 is bent upward to form an insertion needle 1101, which is inserted into the insertion hole 303. The other end of the elastic hoop 11 is connected to the top cover 2, i.e., the top cover 2 is provided with a column 203, and the other end of the elastic hoop 11 is provided with a ring 1102, which covers the outside of the column 203. This structure provides good positioning for the pencil, facilitates assembly between the elastic hoop 11 and the synchronization member 3, and simplifies the assembly structure between the top cover 2 and the elastic hoop 11, thus facilitating assembly.

[0058] In one embodiment, the sliding direction of the sliding rail 302 intersects the swinging direction of the clamp member 10. With this structure, even if the synchronous member 3 rotates, it does not affect the rotation of the clamp member 10, resulting in a good cooperative effect.

[0059] Multiple positioning columns 204 are provided on the side of the top cover 2 closest to the synchronization member 3. The synchronization member 3 is provided with a rotating rail hole 304 that fits with the positioning columns 204. The ends of the positioning columns 204 are combined within the rotating rail hole 304, and when the synchronization member 3 is rotated by the elastic hoop 11, the positioning columns 204 and the rotating rail hole 304 slide relative to each other. The positioning columns 204 are located inside the elastic hoop 11. This structure allows the positioning columns 204 to restrict the movement trajectory of the synchronization member 3, enabling the synchronization member 3 to accurately drive the clamp member 10, and achieving the effect of synchronous rotation of the clamp member 10.

[0060] As shown in Figures 8 to 13, in one embodiment of the present application, the drive device includes a base 12, and a drive member 13, a transmission assembly, and a toothed disc 14 are provided inside the base 12. Openings are provided at both the upper and lower ends of the base 12, and a partition plate 1201 is provided in the center of the base 12. The partition plate 1201 divides the chamber of the base 12 into a first chamber 1202 and a second chamber 1203, and a connection hole 1204 is provided in the center of the partition plate 1201. The transmission assembly includes a first drive gear 15, and the center of the first drive gear 15 is rotatably connected to the connection hole 1204.

[0061] In one embodiment, a gear portion 1501 is provided at one end of the first drive gear 15, the gear portion 1501 protrudes into the first chamber 1202, the toothed disc 14 is housed in the first chamber 1202, and the gear portion 1501 is transmitted to the toothed disc 14. The transmission assembly further includes a plurality of second drive gears 16, in this embodiment, three second drive gears 16 are provided, the second drive gears 16 are housed in the first chamber 1202 and are rotatably connected to a partition plate 1201, that is, a connecting shaft is provided in the center of the second drive gear 16, a shaft through hole is provided in the partition plate 1201, the connecting shaft is rotatably inserted into the shaft through hole, and one side of the second drive gear 16 meshes with the gear portion 1501 of the first drive gear 15. A flange 1401 is provided on the edge of the toothed disc 14 closest to the second drive gear 16, and a ring gear 1402 is provided on the inner wall of the flange 1401. The toothed disc 14 covers the outside of the second drive gear 16, and the other end of the second drive gear 16 meshes with the ring gear 1402.

[0062] A second pen insertion hole 1403 is provided in the center of the toothed disc 14, and a shaft hole is provided in the center of the first drive gear 15. The shaft hole and the second pen insertion hole 1403 are aligned, and an elastic engagement portion 1404 is provided on the side of the toothed disc 14 closer to the first drive gear 15. A regulating step 1502 is provided inside the shaft hole, and the elastic engagement portion 1404 is inserted into the shaft hole and engaged with the regulating step 1502. The toothed disc 14 and the first drive gear 15 are rotatable relative to each other. The holder 1 of the pen clamp device is connected to the upper end of the base 12, and the toothed disc 14 is located below the pen clamp roller assembly. Multiple moving teeth 1405 are provided on the edge of the end face of the toothed disc 14 closest to the pen clamp roller assembly, and the gear 7 meshes with one of these moving teeth 1405, so that when the toothed disc 14 rotates, the gear 7 rotates as it is moved by the different moving teeth 1405 in sequence.

[0063] A connecting portion 1503 is provided at the other end of the first drive gear 15, and the connecting portion 1503 is inserted into the second chamber 1203. The drive member 13 is housed in the second chamber 1203, and the connecting portion 1503 is connected to the drive unit. The drive member 13 has a lid-like structure, and a third pen insertion hole is provided in the center of the drive member 13. The third pen insertion hole and the second pen insertion hole 1403 are aligned, and a convex ring 1301 is provided in the center of the drive member 13, on the side closer to the connecting portion 1503. The convex ring 1301 is embedded in the shaft hole of the first drive gear 15, and connecting teeth 1302 for connecting to a drive source are provided on the inner wall of the convex ring 1301.

[0064] In one embodiment, a plurality of elastic sheets 1504 are provided on the outer circumferential wall of the connection portion 1503 of the first drive gear 15. The elastic sheets 1504 are housed between the convex ring 1301 and the side wall of the drive member 13. Projections are provided at the ends of the elastic sheets 1504. A second groove 1303 is provided on the inside of the side wall of the drive member 13 to fit the projections, and the projections are embedded in the second groove 1303. This structure simplifies the structure between the first drive gear 15 and the drive member 13, facilitates assembly, and provides a good connection effect. In the operation of the pen feeding mechanism disclosed in this application, the drive source rotates the drive member 13, thereby rotating the first drive gear 15, the first drive gear 15 rotates to rotate the second drive gear 16, thereby rotating the toothed disc 14, and when the toothed disc 14 rotates, the moving teeth 1405 on the toothed disc 14 can rotate the gear 7, thereby rotating the pivot shaft 5 and the rollers 6. The drive source can rotate the drive member 13 in the forward or reverse direction, thereby rotating all three rollers 6 in the inward or outward direction, when all three rollers 6 rotate inward, the pencil can be inserted into the pen feeding mechanism, and conversely, when all three rollers 6 rotate outward, the pencil can be ejected from the pen feeding mechanism.

[0065] Pencils of different diameters or shapes pass through the fourth pen insertion hole 301 and the first pen insertion hole 201 in order before entering the triangular pen clamp area 4. The pivot shaft 5 is pressed by the pencil, and the protruding column 503 at its end slides within the sliding groove 106. The protruding column 503, by sliding, pushes the clamp member 10 so that it rotates, and the rotation of the clamp member 10 causes a twist in the elastic hoop 11, thereby rotating the synchronization member 3. The synchronization member 3, by rotating, can synchronously rotate the clamp member 10, enabling the clamp member 10 to open synchronously and adjusting the roller 6 to the appropriate position. The pencil is then fed into the pen feeding mechanism by the roller 6. When the pencil is ejected from the pen feeding mechanism, it no longer presses against the roller 6, and the protruding column 503 returns to its initial position due to the clamping force of the clamp member 10. At this time, the synchronization member 3 causes the clamp member 10 to close synchronously.

[0066] This application further discloses a pen sharpener including a housing, the housing comprising a pen feeding mechanism and a pen sharpening mechanism having the above-described structure, the pen feeding mechanism being located above the pen sharpening mechanism. The pen sharpener includes a hob and a hob frame, the hob frame being electrically connected to the connecting teeth of the drive member of the pen feeding mechanism.

[0067] This application is not limited to the best embodiment described above, and anyone can obtain various other forms of products under the influence of this application, but any changes in shape or structure, if there is an art invention that is the same as or similar to this application, it will be within the scope of protection of this application. [Explanation of symbols]

[0068] 1. Holder; 101. First support wall; 102. Second support wall; 103. Third support wall; 104. Embedding groove; 105. First recessed groove; 106. Sliding groove; 107. Regulating ring; 108. Housing chamber; 2. Top cover; 201. First pen insertion hole; 202. Matching hole; 203. Column; 204. Positioning column; 3. Synchronizing member; 301. Fourth pen insertion hole; 302. Sliding rail; 303. Insertion hole; 304. Rotating rail hole; 4. Triangular pen clamp area; 5. Rotating shaft; 501. Regulating plane; 502. Spherical head; 503. Convex column; 6. Roller; 7. Gear; 701. Bushing; 8. Regulating sheet; 9. Connecting sleeve; 901 , embedded ring; 10, clamping member; 1001, arcuate surface; 11, elastic hoop; 1101, insertion needle; 1102, ring; 12, base; 1201, partition plate; 1202, first chamber; 1203, second chamber; 1204, connecting hole; 13, drive member; 1301, convex ring; 1302, connecting teeth; 1303, second concave groove; 14, toothed disc; 1401, flange; 1402, ring gear; 1403, second pen insertion hole; 1404, elastic engagement part; 1405, moving teeth; 15, first drive gear; 1501, gear part; 1502, regulating step; 1503, connecting part; 1504, elastic sheet; 16, second drive gear.

Claims

1. A pen feeding mechanism comprising a drive unit and a pen clamp device, wherein the drive unit is connected to the pen clamp device and the drive unit can operate and drive the pen clamp device, the pen clamp device includes a holder (1), the holder (1) is provided with three pen clamp roller assemblies, and a triangular pen clamp area (4) is formed between the three pen clamp roller assemblies into which a pencil can be inserted, A pen feeding mechanism characterized in that one end of the pen clamp roller assembly is rotatably connected to the holder (1), the other end of the pen clamp roller assembly is slidably connected to the holder (1), a clamp assembly is provided between the movable end of the pen clamp roller assembly and the holder (1), and the clamp assembly includes a clamp member (10) that is movably connected to the holder (1) and abuts against the movable end of the pen clamp roller assembly, and a return elastic member supported between the clamp member (10) and the holder (1).

2. The pen feeding mechanism according to claim 1, characterized in that the return elastic member is an elastic hoop (11), the elastic hoop (11) covers the outside of the other ends of the three clamp members (10), a synchronization member (3) is rotatably connected to the holder (1), one end of the elastic hoop (11) is connected to the holder (1), the other end of the elastic hoop (11) is connected to the synchronization member (3), and when the elastic hoop (11) is pressed by the clamp members (10) and twisting occurs, it can rotate the synchronization member (3).

3. The pen feeding mechanism according to claim 2, characterized in that the synchronization member (3) is provided on the upper side of the clamp member (10), a sliding rail is provided on the synchronization member (3) at a position corresponding to the clamp member (10), the lower end of the clamp member (10) is hinged to the holder (1), the upper end of the clamp member (10) is slidably combined within the sliding rail (302), the synchronization member (3) can rotate to drive the clamp member (10) to rotate, and at the same time the upper end of the clamp member (10) slides along the sliding rail.

4. The pen feeding mechanism according to claim 3, characterized in that the sliding direction of the sliding rail (302) intersects the swinging direction of the clamp member (10).

5. The pen feeding mechanism according to claim 3, characterized in that the holder (1) includes a top cover (2), the top cover (2) is connected to the side of the holder (1) closer to the synchronization member (3), the synchronization member (3) is rotatably connected to the upper side of the top cover (2), the elastic hoop (11) is provided between the top cover (2) and the synchronization member (3), and one end of the elastic hoop (11) is connected to the top cover (2).

6. The pen feeding mechanism according to claim 5, characterized in that the upper cover (2) is provided with a first pen insertion hole (201) above the triangular pen clamp area (4), the orthographic projection of the first pen insertion hole (201) covers a part of the roller (6) of the pen clamp roller assembly, the upper cover (2) is provided with a matching hole (202), and the other end of the clamp member is fitted into the sliding rail by passing through the matching hole.

7. The pen feeding mechanism according to claim 6, characterized in that a plurality of positioning columns (204) are provided on the side of the upper cover (2) closest to the synchronization member (3), the synchronization member (3) is provided with a rotating rail hole (304) that fits with the positioning columns (204), the ends of the positioning columns (204) are combined within the rotating rail hole (304), and when the synchronization member (3) is rotated by the elastic hoop (11), the positioning columns (204) and the rotating rail hole (304) slide relative to each other.

8. The pen feeding mechanism according to claim 7, characterized in that a fourth pen insertion hole (301) is provided in the central part of the synchronization member (3), the fourth pen insertion hole (301) and the first pen insertion hole (201) are aligned, the synchronization member (3) is provided with an insertion hole (303), one end of the elastic hoop (11) is bent upward to form an insertion needle (1101), and the insertion needle (1101) is inserted into the insertion hole (303).

9. The pen feeding mechanism according to claim 7, further comprising a column (203) on the side of the upper cover (2) closest to the synchronization member (3), a ring (1102) provided at one end of the elastic hoop (11), and the ring (1102) covering the outside of the column (203).

10. The pen feeding mechanism according to claim 5, characterized in that the holder (1) is provided with a first support wall (101) and a second support wall (102), the pen clamp roller assembly is provided between the first support wall (101) and the second support wall (102), the pen clamp roller assembly includes a pivot shaft (5), one end of the pivot shaft (5) is rotatably connected to the first support wall (101), the second support wall (102) is provided with a sliding groove (106), and the other end of the pivot shaft (5) is slidably combined within the sliding groove (106).

11. The pen feeding mechanism according to claim 10, characterized in that the second support wall (102) is provided with a housing chamber (108), the housing chamber (108) is in communication with the sliding groove (106), the clamp member (10) is movably mounted within the housing chamber (108), one side of the clamp member (10) abuts against the movable end of the pivot shaft (5), and the other end of the pivot shaft (5) slides, thereby pushing the clamp member (10) outward.

12. The pen feeding mechanism according to claim 11, characterized in that one end of the clamp member (10) is hinged to the side wall of the housing chamber (108), one side of the central part of the clamp member (10) abuts against the other end of the pivot shaft (5), and the other end of the clamp member (10) is connected to the return elastic member.

13. The pen feeding mechanism according to claim 12, characterized in that one side of the central part of the clamp member (10) is an arcuate surface (1001), and the arcuate surface (1001) abuts against the other end of the pivot shaft (5).

14. The pen feeding mechanism according to claim 10, characterized in that the roller (6) of the pen clamp roller assembly is attached to the pivot shaft (5), a gear (7) is further attached to the pivot shaft (5), the gear (7) is connected to the drive device, the drive device rotates the gear (7), and the gear (7) can rotate the pivot shaft (5) and the roller (6) in synchronous motion.

15. The pen feeding mechanism according to claim 14, wherein the holder (1) is provided with a third support wall (103) between the first support wall (101) and the second support wall (102), and the third support wall (103) is supported on the lower side of the portion of the pivot shaft (5) between the gear (7) and the roller (6).

16. The pen feeding mechanism according to claim 15, characterized in that a first groove (105) is provided on the upper surface of the third support wall (103), and the pivot shaft (5) is embedded in the first groove (105).

17. A bush (701) is connected to one side of the gear (7), a shaft hole is provided in the central part of the gear (7), the shaft hole is coaxial with and communicates with the through hole of the bush (701), at least one regulating plane (501) is provided on the side wall of the pivot shaft (5), the shape of the shaft hole of the gear (7) and the shape of the through hole of the bush (701) both match the cross-section of the pivot shaft (5), the gear (7) and the bush (701) cover the outside of the pivot shaft (5), one end of the bush (701) abuts against the roller (6), and the bush (701) is embedded in the first groove (105), as described in 16.

18. The pen feeding mechanism according to claim 17, characterized in that a mounting hole is provided in the center of the roller (6), a connecting sleeve (9) is provided inside the mounting hole, the shape of the through hole of the connecting sleeve (9) matches the shape of the cross-section of the pivot shaft (5), and the connecting sleeve (9) is tightly fitted outside the pivot shaft (5) and abuts against the outside of the bush (701).

19. The pen feeding mechanism according to claim 17, characterized in that a regulating sheet (8) is provided on the outside of the gear (7) of the pivot shaft (5), and the regulating sheet (8) is restricted to the outside of the gear (7).

20. The pen feeding mechanism according to claim 19, characterized in that a spherical head (502) is provided at the end of the pivot shaft (5) closest to the gear (7), an embedded groove (104) that fits the spherical head (502) is provided in the side wall of the first support wall (101), and the spherical head (502) is rotatably connected within the embedded groove (104).

21. The pen feeding mechanism according to claim 20, characterized in that a protruding column (503) is provided at the end of the pivot shaft (5) closest to the roller (6), the cross-section of the protruding column (503) is circular, and the protruding column (503) is mounted by rolling to the bottom of the sliding groove (106).

22. The pen feeding mechanism according to claim 15, characterized in that a regulating ring (107) for inserting a pencil is provided in the center of the holder (1), the regulating ring (107) is connected to the second support wall (102) and the third support wall (103), the regulating ring (107) is placed directly above the triangular pen clamp area (4), and the orthographic projection of the regulating ring (107) covers a part of the roller (6).

23. The pen feeding mechanism according to claim 14, wherein the drive device includes a base (12), the base (12) is provided with a drive member (13), a transmission assembly and a toothed disc (14), the drive member (13) is used to be connected to a drive source, the transmission assembly is connected between the drive member (13) and the toothed disc (14), the toothed disc (14) is provided with a plurality of moving teeth (1405), the drive member (13) can rotate the toothed disc (14) by the transmission assembly, and when the toothed disc (14) rotates, the moving teeth (1405) can rotate the gear (7) of the pen clamp roller assembly, thereby rotating the roller (6) of the pen clamp roller assembly.

24. A partition plate (1201) is provided in the center of the base (12), and the partition plate (1201) divides the chamber of the base (12) into a first chamber (1202) and a second chamber (1203). A connection hole (1204) is provided in the center of the partition plate (1201). The transmission assembly includes a first drive gear (15), the center of which is rotatably connected to the connection hole (1204). A gear portion (1501) is provided at one end of the first drive gear (15), and the gear portion (1501) is connected to the first chuck. The pen feeding mechanism according to claim 23, characterized in that the toothed disc (14) is housed in the first chamber (1202) and the gear portion (1501) is driven to the toothed disc (14), a connecting portion (1503) is provided at the other end of the first drive gear (15), the connecting portion (1503) is housed in the second chamber (1203) and the drive member (13) is housed in the second chamber (1203), and the connecting portion (1503) is connected to the drive member (13).

25. The pen feeding mechanism according to claim 24, wherein the transmission assembly further includes a plurality of second drive gears (16), the second drive gears (16) being housed in the first chamber (1202) and rotatably connected to the partition plate (1201), one side of the second drive gear (16) meshing with the gear portion (1501) of the first drive gear (15), a flange (1401) provided on the edge of the toothed disc (14) on the side closer to the second drive gear (16), a ring gear (1402) provided on the inner wall of the flange (1401), the toothed disc (14) covering the outside of the second drive gear (16), and the other end of the second drive gear (16) meshing with the ring gear (1402).

26. The pen feeding mechanism according to claim 25, characterized in that a second pen insertion hole (1403) is provided in the center of the toothed disc (14), a shaft hole is provided in the center of the first drive gear (15), the shaft hole and the second pen insertion hole (1403) are aligned, an elastic engagement portion (1404) is provided on the side of the toothed disc (14) closer to the first drive gear (15), a regulating step (1502) is provided inside the shaft hole, the elastic engagement portion (1404) is inserted into the shaft hole and engaged with the regulating step (1502), and the toothed disc (14) and the first drive gear (15) are rotatable relative to each other.

27. The pen feeding mechanism according to claim 26, characterized in that the drive member (13) has a lid-like structure, a third pen insertion hole is provided in the central part of the drive member (13), the third pen insertion hole and the second pen insertion hole (1403) are aligned, a convex ring (1301) is provided in the central part of the drive member (13) on the side closer to the connection part (1503), the convex ring (1301) is embedded in the shaft hole of the first drive gear (15), and connecting teeth (1302) for connecting to a drive source are provided on the inner wall of the convex ring (1301).

28. The pen feeding mechanism according to claim 27, characterized in that a plurality of elastic sheets (1504) are provided on the outer peripheral wall of the connection portion (1503) of the first drive gear (15), the elastic sheets (1504) are housed between the convex ring (1301) and the side wall of the drive member (13), projections are provided at the ends of the elastic sheets (1504), a second recessed groove (1303) that fits with the projections is provided on the inside of the side wall of the drive member (13), and the projections are embedded in the second recessed groove (1303).

29. A pen sharpener including a housing, wherein a pen feeding mechanism and a pen sharpening mechanism according to any one of claims 1 to 28 are provided inside the housing, the pen feeding mechanism is provided above the pen sharpening mechanism, and the pen feeding mechanism is connected to the pen sharpening mechanism.

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