Pencil feeding mechanism and pencil sharpener

Abstract

The pencil feeding mechanism comprises a pencil feeding seat and a knife rest assembly, a transmission wheel is installed in the pencil feeding seat, the knife rest assembly is in transmission connection with the transmission wheel, the knife rest assembly is stressed to drive the transmission wheel to rotate relative to the pencil feeding seat, the pencil feeding seat is provided with a toothed ring, and the toothed ring is connected with the knife rest assembly. A plurality of planet wheels are arranged between the gear ring and the transmission wheel, the gear ring and the transmission wheel are both meshed with the planet wheels, the transmission wheel rotates to drive the planet wheels to rotate along the gear ring, a flexible speed reduction wheel meshed with the planet wheels is installed on the pencil feeding seat, and the planet wheels drive the flexible speed reduction wheel to rotate. According to the pen feeding mechanism, the flexible speed reduction wheel is additionally arranged, so that the speed reduction effect is enhanced, the pen feeding stability is improved, and a pen refill is prevented from being broken.

Description

Technical Field

[0001] The utility model relates to the technical field of stationery products, and more specifically to a pen 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 pencil clamping mechanism, a pen feeding mechanism and a pencil sharpening mechanism. When sharpening a pencil, the pencil passes through the pencil clamping mechanism and the pen feeding mechanism and enters the pencil sharpening mechanism. After the pencil is in place, it is clamped by the pencil clamping mechanism. The pen feeding mechanism is used to automatically feed the pencil, and then the pencil sharpening mechanism cuts the pencil tip. In the cutting process of the existing pencil sharpener, the control of the pen feeding speed mainly depends on the shape of the conical inner cavity on the tool holder. During the cutting process, an inward force is applied to the pen being cut, so that the pen is pushed into the conical inner cavity while being cut. Since the contact surface between the blade of the pencil sharpener mechanism and the pen being cut changes during the cutting process, the force applied to the pen changes with the pencil sharpening process, especially the force applied in the second half of the pencil sharpening process is the largest, thus generating a large cutting resistance and easily causing a broken core failure. At the same time, with the development of pencil sharpener technology, this extensive control technology that only relies on the shape of the conical inner cavity to control the pen feeding speed can no longer meet the refined requirements in the product iteration process of pencil sharpeners.

[0003] For example, the utility model patent with publication number: CN208867760U discloses an automatic pen feeding mechanism and a pencil sharpener, the automatic pen feeding mechanism comprises: a mounting seat, the mounting seat comprises a mounting frame, a wheel disc is mounted in the mounting frame, the wheel disc is evenly provided with helical teeth, a first roller and a second roller are provided in front of the wheel disc, the first roller and the second roller are arranged in parallel, the first roller is rotatably connected through a first mounting frame, the second roller is rotatably connected through a second mounting frame, a first sleeve is clamped at one end of the first roller, the first sleeve is fixedly connected to the first gear, a second sleeve is clamped at the other end of the second roller relative to the first gear, the second sleeve is fixedly connected to the second gear, the first gear and the second gear are meshed with the helical teeth of the wheel disc, and openings are symmetrically arranged between the first roller and the second roller, and the openings are bevel openings. In this technical solution, the bevel teeth on the wheel fan mesh with the first gear and the second gear, and the first roller and the second roller are driven to rotate by rotating the wheel, so that the pen can be stably fed into the pencil sharpener for cutting, thereby improving the pen feeding efficiency. However, the pen feeding mechanism does not have the ability to decelerate. When sharpening the pen, the pen feeding speed is too fast, which often results in the pen tip being too thick, or the pen core being broken, the pen edge being sharpened, and over-sharpening. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a pen feeding mechanism and a pencil sharpener. The pen feeding mechanism is additionally provided with a flexible deceleration wheel to enhance the deceleration effect, improve the pen feeding stability and avoid the breakage of the pen core.

[0005] The utility model provides a pen-feeding mechanism, comprising a pen-feeding seat and a tool holder assembly, a transmission wheel is installed in the pen-feeding seat, the tool holder assembly is in transmission connection with the transmission wheel, the tool holder assembly is subjected to force to drive the transmission wheel to rotate relative to the pen-feeding seat, the pen-feeding seat is provided with a gear ring, a plurality of planetary gears are arranged between the gear ring and the transmission wheel, the gear ring and the transmission wheel are both meshed with the planetary gear, the transmission wheel drives the planetary gear to rotate along the gear ring by rotating, the pen-feeding seat is provided with a flexible reduction wheel meshed with the planetary gear, the planetary gear drives the flexible reduction wheel to rotate, and the flexible reduction wheel causes the planetary gear to rotate along the gear ring at a reduced speed.

[0006] In the technical scheme, the pencil is inserted into the tool holder assembly through the pen feed seat, and the tool holder assembly is rotated to cut the pencil tip. The pen feed seat and the tool holder assembly are connected through a transmission wheel, and a gear ring is provided in the pen feed seat. The transmission wheel and the gear ring are linked by a planetary gear. The tool holder assembly is driven by force to drive the transmission wheel to rotate, and the transmission wheel drives the planetary wheel to rotate along the gear ring, thereby improving the transmission efficiency. The torque is increased by arranging the planetary gear, and the structure has the advantages of compact structure and balanced transmission. A flexible reduction wheel meshing with the planetary gear is added in the pen feed seat, and the planetary gear can drive the flexible reduction wheel to rotate by rotating. Under the action of the flexible reduction wheel, the planetary gear is decelerated along the rotation of the gear. The planetary gear and the flexible reduction wheel cooperate to produce a flexible transmission with a deceleration effect, so that the pen feed mechanism has a better deceleration effect, avoids too fast a feeding speed when sharpening the pen, improves the feeding stability, and avoids problems such as thick pen tip or broken core, burrs and over-sharpening.

[0007] As an improvement, the flexible reduction wheel is sleeved in the pen feed seat, the gear ring is arranged at the bottom of the pen feed seat, and the flexible reduction wheel and the gear ring are distributed up and down. In the present technical scheme, a flexible reduction wheel is arranged to be sleeved with the pen feed seat, and the flexible reduction wheel can be rotated in the pen feed seat under force, and the installation of the flexible reduction wheel is simple and reliable, and the gear is arranged at the bottom of the pen feed seat, and the gear ring and the pen feed seat are an integrally formed structure, the gear ring structure is simple, and the transmission is reliable, and the flexible reduction wheel and the gear ring are arranged to be distributed up and down, and the flexible reduction wheel and the gear ring are both meshed with the outer periphery of the planetary gear, the structure is compact and the transmission is reliable, and the flexible reduction wheel and the gear ring occupy a small space, and the overall size of the pen feed mechanism is less affected. It should be noted that the flexible reduction wheel in the present scheme can be located above the gear ring, or the gear ring can be located above the flexible reduction wheel, and the upper and lower positions of the two can be interchanged, and the present scheme does not limit this.

[0008] As an improvement, the first roller and the second roller are movably installed in the pen feeder, and a clamping opening for the pencil to pass through is formed between the first roller and the second roller. The first roller and the second roller are forced to move to adjust the size of the clamping opening. In this technical solution, by arranging the first roller and the second roller in the pen feeder, the pencil passes through the clamping opening formed between the first roller and the second roller after being inserted into the pen feeder, and the pencil is clamped by the first roller and the second roller, thereby improving the efficiency of pencil sharpening. The first roller and the second roller are movably arranged in the pen feeder, and the first roller and the second roller can movably adjust the size of the clamping opening according to the size of the inserted pencil, so as to adapt to the use of pencils of various sizes and have better practicality.

[0009] As an improvement, one end of the first roller is rotatably mounted on the pen feeder, the other end of the first roller is swingably mounted on the pen feeder, one end of the second roller is rotatably mounted on the pen feeder, the other end of the second roller is swingably mounted on the pen feeder, and the first roller and the second roller are subjected to force to adjust the size of the clamping opening by swinging. In this technical solution, one end of the first roller is set on the pen feeder and can only rotate, and the other end of the first roller can both rotate and swing on the pen feeder, and the first roller can approach or move away from the second roller by swinging. Similarly, one end of the second roller is set on the pen feeder and can only rotate, and the other end of the second roller can both rotate and swing on the pen feeder, and the second roller can approach or move away from the first roller by swinging. When the pencil is inserted into the clamping opening, it will abut against the first roller and the second roller, so that the first roller and the second roller are both subjected to force to move relatively away from each other by swinging, so that the size of the clamping opening becomes larger for the pencil to pass through, and the transmission structure is simple and reliable.

[0010] As an improvement, a first semicircular groove is provided on one side of the pen feeder, a second semicircular groove is provided on the other side of the pen feeder, one end of the first roller is installed in the first semicircular groove, and one end of the second roller is installed in the second semicircular groove. In this technical solution, one end of the first roller is installed in the first semicircular groove, so that the end can only rotate on the pen feeder, and one end of the second roller is installed in the second semicircular groove, so that the end can only rotate on the pen feeder. The first semicircular groove and the second semicircular groove have simple structures, the first roller and the second roller are easy to install and save effort, and the rotation efficiency of the first roller and the second roller is high.

[0011] As an improvement, a first strip groove is provided on one side of the pen feeder, a second strip groove is provided on the other side of the pen feeder, the other end of the second roller is installed in the first strip groove, and the other end of the first roller is installed in the second strip groove. In this technical solution, the other end of the second roller is installed in the first strip groove, so that the end can both rotate and swing on the pen feeder, and the other end of the first roller is installed in the second strip groove, so that the end can both rotate and swing on the pen feeder. The size of the pen feeder is limited, and the first roller and the second roller are distributed on the pen feeder in opposite directions, so that the swingable range of the first roller and the second roller on the pen feeder is increased, the adjustable size range of the clamping port is increased, and the practicality is better. In addition, the first strip groove and the second strip groove have simple structures, and the first roller and the second roller are easy and labor-saving to install.

[0012] As an improvement, a wheel disc is installed on the flexible reduction wheel, and the wheel disc is provided with an opening connected to the clamping port, and the first roller and the second roller are both linked with the wheel disc, and the flexible reduction wheel drives the wheel disc to rotate, and the wheel disc rotates to drive the first roller and the second roller to rotate and deliver the pen. In this technical solution, by providing a wheel disc capable of driving the first roller and the second roller to rotate, the flexible reduction wheel drives the wheel disc to rotate, and the wheel disc drives the first roller and the second roller to rotate by rotating, so that the pencil can be stably delivered into the tool holder mechanism through the pen feed seat for cutting, and the pencil entry and exit will not be interfered by the first roller and the second roller, the transmission efficiency is good, and the efficiency of pen feeding and retracting is high.

[0013] As an improvement, a plurality of helical teeth are evenly arranged on the wheel disc, a first gear matched with the helical teeth is arranged on the first roller, a second gear matched with the helical teeth is arranged on the second roller, the first gear and the second gear are both meshed with the helical teeth, and the flexible reduction wheel drives the wheel disc to rotate to drive the first roller and the second roller to rotate. In this technical solution, by arranging helical teeth on the wheel disc, arranging a first gear meshed with the helical teeth on the first roller, and arranging a second gear meshed with the helical teeth on the second roller, the wheel disc rotates to drive the first roller and the second roller to rotate through the helical teeth, 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 advancing and retracting the pen.

[0014] As an improvement, the pen feeder seat includes a first shell and a second shell, the gear ring, planetary gear and flexible reduction wheel are all located in the second shell, and the bottom of the second shell is provided with a mounting port adapted to the transmission wheel, and the transmission wheel is installed at the mounting port to be connected to the tool holder assembly in a transmission manner. In this technical solution, the pen feeder seat is composed of a first shell and a second shell, and the pen feeder seat has a simple and reliable structure. The gear ring, planetary gear and flexible reduction wheel are all located in the second shell, and the overall structure is compact, which improves the transmission efficiency. The pen feeder seat and the tool holder mechanism are linked through the transmission wheel. By providing a mounting port at the bottom of the second shell where the transmission wheel can be installed, the transmission wheel can be installed simply and reliably. The transmission wheel passes through the mounting port to be connected to the tool holder assembly in a transmission manner. The tool holder assembly rotates to drive the transmission wheel to rotate synchronously. The connection structure is simple and reliable, and the transmission efficiency is high.

[0015] The utility model can also provide a pencil sharpener, including any one of the aforementioned pen feeding mechanisms. The pencil sharpener in the technical solution is equipped with the aforementioned pen feeding mechanism, which is provided with a flexible reduction wheel meshing with a planetary wheel in the pen feeding seat, and the planetary wheel can drive the flexible reduction wheel to rotate by rotating. Under the action of the flexible reduction wheel, the planetary wheel decelerates along the rotation of the gear, and the planetary wheel cooperates with the flexible reduction wheel to produce a flexible transmission with a deceleration effect, 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 problems such as the pen tip being too thick or the pen core being broken during sharpening, the pen edge being sharpened, and over-sharpening. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention discloses a three-dimensional structural schematic diagram of a pen feeding mechanism.

[0017] Figure 2 The present invention discloses an exploded structural schematic diagram of a pen feeding mechanism.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the second housing, transmission wheel, planetary gear and flexible reduction wheel in the present disclosure.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the second shell in the present disclosure.

[0020] Figure 5 The present invention discloses a partial structural schematic diagram of a pen feeding mechanism.

[0021] As shown in the figure: 1. pen feeder; 11. first shell; 12. second shell; 121. gear ring; 122. first semicircular groove; 123. second semicircular groove; 124. first strip groove; 125. second strip groove; 126. mounting port; 2. tool holder assembly; 3. transmission wheel; 4. planetary gear; 5. flexible reduction wheel; 61. first roller; 611. first gear; 62. second roller; 621. second gear; 63. wheel disc; 631. opening; 632. bevel teeth. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] like Figures 1 to 5 As shown, the present application discloses a pen feeding mechanism, including a pen feeding seat 1 and a knife holder assembly 2. The pencil passes through the pen feeding seat 1 and is inserted into the knife holder assembly 2. The knife holder assembly 2 is rotated to cut the pencil tip. A transmission wheel 3 is installed in the pen feeding seat 1. The knife holder assembly 2 is connected to the transmission wheel 3. The knife holder assembly 2 is driven by the transmission wheel 3 to rotate relative to the pen feeding seat 1. The pen feeding seat 1 is provided with a gear ring 121. A plurality of planetary gears 4 are provided between the gear ring 121 and the transmission wheel 3. The gear ring 121 and the transmission wheel 3 are connected by the gear ring 121. The drive wheel 3 is meshed with the planetary gear 4, and the planetary gear 4 is driven to rotate along the gear ring 121 by the rotation of the drive wheel 3. The pen feeder 1 is connected to the tool holder assembly 2 through the drive wheel 3, and the tool holder 1 is provided with a gear ring 121. The drive wheel 3 and the gear ring 121 are linked through the planetary gear 4. The tool holder assembly 2 is driven to drive the drive wheel 3 to rotate, and the drive wheel 3 drives the planetary gear 4 to rotate along the gear ring 121, thereby improving the transmission efficiency, increasing the torque by providing the planetary gear 4, and having the advantages of compact structure and balanced transmission, etc.

[0026] The pen feed seat 1 is equipped with a flexible reduction wheel 5 meshing with the planetary gear 4, the planetary gear 4 drives the flexible reduction wheel 5 to rotate, and the flexible reduction wheel 5 makes the planetary gear 4 rotate along the gear ring 121 at a reduced speed. By adding a flexible reduction wheel 5 meshing with the planetary gear 4 in the pen feed seat 1, the planetary gear 4 can drive the flexible reduction wheel 5 to rotate by rotating. Under the action of the flexible reduction wheel 5, the planetary gear 4 decelerates along the rotation of the gear. The planetary gear 4 cooperates with the flexible reduction wheel 5 to produce a flexible transmission with a deceleration effect, so that the pen feed 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 problems such as the pen tip being too thick or the pen core being broken, the pen edge being sharpened, and over-sharpening.

[0027] More specifically, Figures 2 to 4 As shown, the flexible reduction wheel 5 is sleeved in the pen feed seat 1, and the gear ring 121 is arranged at the bottom of the pen feed seat 1, the flexible reduction wheel 5 and the gear ring 121 are distributed up and down, and the flexible reduction wheel 5 is arranged to be sleeved with the pen feed seat 1, and the flexible reduction wheel 5 can rotate in the pen feed seat 1 under force, and the installation of the flexible reduction wheel 5 is simple and reliable, and the gear is arranged at the bottom of the pen feed seat 1, and the gear ring 121 and the pen feed seat 1 are an integrally formed structure, the gear ring 121 has a simple structure and reliable transmission, and the flexible reduction wheel 5 and the gear ring 121 are arranged to be distributed up and down, and the flexible reduction wheel 5 and the gear ring 121 are both meshed with the outer periphery of the planetary gear 4, the structure is compact and the transmission is reliable, and the flexible reduction wheel 5 and the gear ring 121 occupy a small space, and have little effect on the overall size of the pen feed mechanism. It should be noted that the flexible reduction wheel 5 in this embodiment can be located above the gear ring 121, or the gear ring 121 can be located above the flexible reduction wheel 5, and the upper and lower positions of the two can be interchanged, and this scheme is not limited to this.

[0028] More specifically, Figure 2 and Figure 5 As shown, a first roller 61 and a second roller 62 are movably installed in the pen feeder 1, a clamping opening for the pencil to pass through is formed between the first roller 61 and the second roller 62, and the first roller 61 and the second roller 62 are forced to move to adjust the size of the clamping opening. By arranging the first roller 61 and the second roller 62 in the pen feeder 1, the pencil passes through the clamping opening formed between the first roller 61 and the second roller 62 after being inserted into the pen feeder 1, and the pencil is clamped by the first roller 61 and the second roller 62, thereby improving the efficiency of pencil sharpening. The first roller 61 and the second roller 62 are movably arranged in the pen feeder 1, and the first roller 61 and the second roller 62 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 sizes and have better practicality.

[0029] More specifically, Figure 2 and Figure 5As shown, one end of the first roller 61 is rotatably mounted on the pen feeder seat 1, and the other end of the first roller 61 is swingably mounted on the pen feeder seat 1. One end of the second roller 62 is rotatably mounted on the pen feeder seat 1, and the other end of the second roller 62 is swingably mounted on the pen feeder seat 1. The first roller 61 and the second roller 62 are subjected to force and swing to adjust the size of the clamping opening. One end of the first roller 61 is only rotatable on the pen feeder seat 1, and the other end of the first roller 61 is both rotatable and swingable on the pen feeder seat 1. The first roller 61 is rotated by the first roller 61 and the second roller 62 are swingably mounted on the pen feeder seat 1. The second roller 62 can be moved closer to or farther away from the second roller 62 by swinging. Similarly, one end of the second roller 62 is arranged on the pen feeder seat 1 to be only rotatable, and the other end of the second roller 62 can be both rotatable and swung on the pen feeder seat 1. The second roller 62 can be moved closer to or farther away from the first roller 61 by swinging. When a pencil is inserted into the clamping opening, it will abut against the first roller 61 and the second roller 62, so that the first roller 61 and the second roller 62 are both forced to move relatively farther away from each other by swinging, so that the size of the clamping opening becomes larger to allow the pencil to pass through. The transmission structure is simple and reliable.

[0030] More specifically, Figure 2 , Figure 4 and Figure 5 As shown, a first semicircular groove 122 is provided on one side of the pen feeder 1, and a second semicircular groove 123 is provided on the other side of the pen feeder 1, one end of the first roller 61 is installed in the first semicircular groove 122, and one end of the second roller 62 is installed in the second semicircular groove 123, one end of the first roller 61 is installed in the first semicircular groove 122, so that the end can only rotate on the pen feeder 1, and one end of the second roller 62 is installed in the second semicircular groove 123, so that the end can only rotate on the pen feeder 1, the first semicircular groove 122 and the second semicircular groove 123 have a simple structure, the first roller 61 and the second roller 62 are convenient and labor-saving to install, and the rotation efficiency of the first roller 61 and the second roller 62 is relatively high.

[0031] More specifically, Figure 2 , Figure 4 and Figure 5As shown, a first strip groove 124 is provided on one side of the pen feeder 1, and a second strip groove 125 is provided on the other side of the pen feeder 1. The other end of the second roller 62 is installed in the first strip groove 124, and the other end of the first roller 61 is installed in the second strip groove 125. The other end of the second roller 62 is installed in the first strip groove 124, so that the end can both rotate and swing on the pen feeder 1, and the other end of the first roller 61 is installed in the second strip groove 125, so that the end can both rotate and swing on the pen feeder 1. The size of the pen feeder 1 is limited, and the first roller 61 and the second roller 62 are distributed on the pen feeder 1 in opposite directions, so that the swingable range of the first roller 61 and the second roller 62 on the pen feeder 1 is increased, the adjustable size range of the clamping mouth is increased, and the practicality is better. In addition, the first strip groove 124 and the second strip groove 125 have simple structures, and the first roller 61 and the second roller 62 are convenient and labor-saving to install.

[0032] More specifically, Figure 2 and Figure 5 As shown, a wheel disc 63 is installed on the flexible reduction wheel 5, and the wheel disc 63 is provided with an opening 631 connected to the clamping port. The first roller 61 and the second roller 62 are both linked with the wheel disc 63. The flexible reduction wheel 5 drives the wheel disc 63 to rotate, and the wheel disc 63 rotates to drive the first roller 61 and the second roller 62 to rotate and feed the pen. By providing a wheel disc 63 capable of driving the first roller 61 and the second roller 62 to rotate, the flexible reduction wheel 5 drives the wheel disc 63 to rotate, and the wheel disc 63 drives the first roller 61 and the second roller 62 to rotate by rotating, so that the pencil can be stably fed into the tool holder assembly 2 through the pen feed seat 1 for cutting, and the pencil entry and exit will not be interfered by the first roller 61 and the second roller 62, the transmission efficiency is good, and the efficiency of pen feeding and retracting is high.

[0033] More specifically, Figure 2 and Figure 5 As shown, a plurality of helical teeth 632 are evenly arranged on the wheel disc 63, a first gear 611 adapted to the helical teeth 632 is arranged on the first roller 61, and a second gear 621 adapted to the helical teeth 632 is arranged on the second roller 62, and the first gear 611 and the second gear 621 are both meshed with the helical teeth 632, and the flexible reduction wheel 5 drives the wheel disc 63 to rotate to drive the first roller 61 and the second roller 62 to rotate. By arranging the helical teeth 632 on the wheel disc 63, arranging the first gear 611 meshed with the helical teeth 632 on the first roller 61, and arranging the second gear 621 meshed with the helical teeth 632 on the second roller 62, the wheel disc 63 rotates to drive the first roller 61 and the second roller 62 to rotate through the helical teeth 632, the transmission structure is simple, and there is a gap between adjacent helical teeth 632, so that the first roller 61 and the second roller 62 can rotate stably and not easily get stuck, thereby improving the transmission efficiency and the efficiency of advancing and retreating the pen.

[0034] More specifically, Figure 2 and Figure 3 As shown, the pen feeder 1 includes a first shell 11 and a second shell 12, the gear ring 121, the planetary gear 4 and the flexible reduction wheel 5 are all located in the second shell 12, and a mounting opening 126 adapted to the transmission wheel 3 is provided at the bottom of the second shell 12. The transmission wheel 3 is installed at the mounting opening 126 to be connected to the tool holder assembly 2 by transmission. The pen feeder 1 is composed of the first shell 11 and the second shell 12. The pen feeder 1 has a simple and reliable structure. The gear ring 121, the planetary gear 4 and the flexible reduction wheel 5 are all located in the second shell 12. The overall structure is compact and the transmission efficiency is improved. The pen feeder 1 is linked with the tool holder mechanism through the transmission wheel 3. By providing a mounting opening 126 at the bottom of the second shell 12 for installing the transmission wheel 3, the transmission wheel 3 can be installed simply and reliably. The transmission wheel 3 passes through the mounting opening 126 to be connected to the tool holder assembly 2 by transmission. The tool holder assembly 2 drives the transmission wheel 3 to rotate synchronously by rotation. The connection structure is simple and reliable, and the transmission efficiency is high.

[0035] like Figures 1 to 5 As shown, the present embodiment can also provide a pencil sharpener, comprising any one of the aforementioned pen feeding mechanisms, the pencil sharpener is equipped with a pen feeding mechanism, the pen feeding mechanism is achieved by adding a flexible reduction wheel 5 meshing with the planetary gear 4 in the pen feeding seat 1, the planetary gear 4 can drive the flexible reduction wheel 5 to rotate by rotating, under the action of the flexible reduction wheel 5, the planetary gear 4 is decelerated along the rotation of the gear, the planetary gear 4 cooperates with the flexible reduction wheel 5 to produce a flexible transmission with a deceleration effect, 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 problems such as the pen tip being too thick or the pen core being broken, the pen edge being sharpened, and over-sharpening.

[0036] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. A pen feeding mechanism, comprising a pen feeding seat (1) and a tool holder assembly (2), characterized in that: The pen feed seat (1) is provided with a transmission wheel (3), the tool holder assembly (2) is in transmission connection with the transmission wheel (3), the tool holder assembly (2) is subjected to force to drive the transmission wheel (3) to rotate relative to the pen feed seat (1), the pen feed seat (1) is provided with a toothed ring (121), a plurality of planetary gears (4) are provided between the toothed ring (121) and the transmission wheel (3), the toothed ring (121) and the transmission wheel (3) are both meshed with the planetary gears (4), the transmission wheel (3) drives the planetary gears (4) to rotate along the toothed ring (121), the pen feed seat (1) is provided with a flexible reduction wheel (5) meshed with the planetary gears (4), the planetary gears (4) drive the flexible reduction wheel (5) to rotate, and the flexible reduction wheel (5) causes the planetary gears (4) to rotate at a reduced speed along the toothed ring (121).

2. A pen feeding mechanism according to claim 1, characterized in that: The flexible reduction wheel (5) is sleeved in the pen feed seat (1), the toothed ring (121) is arranged at the bottom of the pen feed seat (1), and the flexible reduction wheel (5) and the toothed ring (121) are distributed up and down.

3. A pen feeding mechanism according to claim 1, characterized in that: A first roller (61) and a second roller (62) are movably mounted in the pen feeder (1); a clamping opening for a pencil to pass through is formed between the first roller (61) and the second roller (62); the first roller (61) and the second roller (62) are movable under force to adjust the size of the clamping opening.

4. A pen feeding mechanism according to claim 3, characterized in that: One end of the first roller (61) is rotatably mounted on the pen feed seat (1), and the other end of the first roller (61) is swingably mounted on the pen feed seat (1). One end of the second roller (62) is rotatably mounted on the pen feed seat (1), and the other end of the second roller (62) is swingably mounted on the pen feed seat (1). The first roller (61) and the second roller (62) are subjected to force and swing to adjust the size of the clamping opening.

5. A pen feeding mechanism according to claim 4, characterized in that: A first semicircular groove (122) is provided on one side of the pen feeder seat (1), and a second semicircular groove (123) is provided on the other side of the pen feeder seat (1); one end of the first roller (61) is installed in the first semicircular groove (122), and one end of the second roller (62) is installed in the second semicircular groove (123).

6. A pen feeding mechanism according to claim 4, characterized in that: A first strip groove (124) is provided on one side of the pen feed seat (1), a second strip groove (125) is provided on the other side of the pen feed seat (1), the other end of the second roller (62) is installed in the first strip groove (124), and the other end of the first roller (61) is installed in the second strip groove (125).

7. A pen feeding mechanism according to claim 4, characterized in that: A wheel disc (63) is mounted on the flexible reduction wheel (5), and the wheel disc (63) is provided with an opening (631) connected to the clamping port. The first roller (61) and the second roller (62) are both linked to the wheel disc (63). The flexible reduction wheel (5) drives the wheel disc (63) to rotate, and the wheel disc (63) rotates to drive the first roller (61) and the second roller (62) to rotate.

8. A pen feeding mechanism according to claim 7, characterized in that: The wheel disc (63) is evenly provided with a plurality of bevel teeth (632); the first roller (61) is provided with a first gear (611) adapted to the bevel teeth (632); the second roller (62) is provided with a second gear (621) adapted to the bevel teeth (632); the first gear (611) and the second gear (621) are both meshed with the bevel teeth (632); the flexible reduction wheel (5) drives the wheel disc (63) to rotate so as to drive the first roller (61) and the second roller (62) to rotate and feed the pen.

9. A pen feeding mechanism according to claim 1, characterized in that: The pen feeder (1) comprises a first shell (11) and a second shell (12); the gear ring (121), the planetary gear (4) and the flexible reduction wheel (5) are all located in the second shell (12); a mounting opening (126) adapted to the transmission wheel (3) is provided at the bottom of the second shell (12); the transmission wheel (3) is mounted at the mounting opening (126) to be transmission-connected to the tool holder assembly (2).

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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