Knife rest assembly of pencil sharpener and pencil sharpener

Abstract

The knife rest assembly comprises a knife rest body and a hob installed on the knife rest body, a conical pencil sharpening cavity is formed in the knife rest body, a pencil stopping block matched with the pencil sharpening cavity is installed on the knife rest body, a scrap stopping part connected with the pencil sharpening cavity is arranged on the knife rest body, and the knife rest body is connected with the knife rest body. The scrap blocking part and the pencil stopping block are distributed on the two sides of the knife rest body, the scrap blocking part is used for blocking pencil scraps cut off by a hob from entering a gap between the pencil stopping block and the pencil sharpening cavity, the knife rest assembly can effectively prevent the wood scraps from entering the cavity where the pencil stopping block is located through the scrap blocking part, and the problems that the pencil stopping block is not accurate in positioning, and pencil sharpening tip collapsing and pencil core breaking exist are solved; and the pencil sharpening efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of stationery products, and more specifically to a knife holder assembly of a pencil sharpener and a pencil sharpener. Background Art

[0002] A pencil is mainly composed of a graphite lead and a wooden pen holder. A pencil sharpener is a tool that can shave off the wooden layer on the outside of a pencil to expose the inner lead. A pencil sharpener generally includes a shell, a pen feed mechanism, and a pen sharpening mechanism. Among them, the blade holder assembly is an important component of the pencil sharpening mechanism. When sharpening a pencil, the pencil is passed through the pen feed mechanism and into the pencil sharpening mechanism. The blade holder assembly rotates relative to the inserted pencil through the blade, thereby shaving off the wooden layer on the outer wall of the pencil to expose the lead. The obliquely installed blade can then sharpen the lead to complete the pencil sharpening. The sharpened lead is more convenient for writing and drawing. The existing tool holder assembly includes a tool holder and a hob. The tool holder is connected to a rotary seat. A pinion is provided at one end of the hob. The rotary seat is provided with an internal gear that meshes with the pinion. The rocker arm drives the tool holder and the hob to rotate together. At the same time, the hob rotates by means of gear meshing. The pinion of the hob rotates along the internal gear on the rotary seat. The inner side of the rotary seat has space for the gear to move. When the pencil sharpener is working, wood chips cut by the hob will enter the inner cavity of the rotary seat. The wood chips retained in the cavity will accumulate, affecting the rotation of the hob and increasing the load on the rocker arm. In response to the above problems, the Chinese utility model patent with announcement number: CN204749666U discloses a pencil sharpening mechanism and a pencil sharpener equipped with the pencil sharpening mechanism. The pencil sharpening mechanism includes a rotary wheel seat, a tool holder driven by a rocker arm, and a hob installed on the tool holder. The gear on one end of the hob is engaged with the internal gear of the rotary wheel seat. One end of the tool holder is installed in the middle of the inner side of the rotary wheel seat. The inner side of the rotary wheel seat has a cavity for the gear to move. A chip sweeping block extending toward the inner gear is provided at one end of the tool holder. The chip sweeping block is located in the cavity. In this technical solution, the chip sweeping block on the tool holder rotates in the cavity of the rotary wheel seat to sweep out the wood chips in the cavity, thereby preventing wood chips from accumulating in the rotary wheel seat. However, most current pencil sharpeners have a stopper installed in the tool holder. During the cutting process, the pen hits the stopper to complete the sharpening process. The tool holder can adapt to cutting pens of different thicknesses, softness, and hardness through the stopper. Because the sharpening cavity on the tool holder is tapered and the length of the tapered sharpening cavity is shorter than the length of the hob, there is a gap between the end of the sharpening cavity and the hob. During the sharpening process, small wood chips can easily pass through this gap and enter the cavity where the stopper is located, causing problems such as inaccurate positioning of the stopper and chipped or broken pencils. Therefore, there is still a need for a tool holder assembly that can effectively prevent wood chips from entering the cavity where the stopper is located. Summary of the Invention

[0003] The technical problem to be solved by the present application is to provide a blade holder assembly and a pencil sharpener for a pencil sharpener. The blade holder assembly can effectively prevent wood chips from entering the cavity where the pencil blocking block is located through the chip blocking part, thereby avoiding problems such as inaccurate positioning of the pencil blocking block and chipped pencil tips and broken pencil cores, thereby improving pencil sharpening efficiency.

[0004] The present application provides a blade holder assembly for a pencil sharpener, comprising a blade holder body and a roller mounted on the blade holder body, the blade holder body being provided with a conical pencil sharpening cavity, the blade holder body being provided with a pencil blocking block adapted to the pencil sharpening cavity, the blade holder body being provided with a chip blocking portion engaged with the pencil sharpening cavity, the chip blocking portion and the pencil blocking block being distributed on both sides of the blade holder body, the chip blocking portion being used to prevent pencil chips cut off by the roller from entering the gap between the pencil blocking block and the pencil sharpening cavity. In the present technical solution, a pencil block is installed on the tool holder body to adapt to the cutting of pens of different thicknesses and different hardnesses. A chip stop portion engaged with the pencil sharpening cavity is provided on the tool holder body to avoid the formation of a gap between the end of the pencil sharpening cavity and the roller, and to prevent the pencil shavings cut off by the roller from entering the gap between the pencil block and the pencil sharpening cavity. In particular, pencils with softer properties such as water-soluble colored pencils and sketch pencils are more likely to have pencil shavings generated after cutting to enter the gap between the pencil block and the pencil sharpening cavity and clog the pencil block. The effective blocking of the chip stop portion can avoid the problems of inaccurate positioning of the pencil block, broken tip of the pencil, and broken pencil core, thereby improving the efficiency of pencil sharpening.

[0005] As an improvement, the chip guard is tangential to the outer periphery of the hob. In this technical solution, by providing a chip guard tangential to the outer periphery of the hob, the chip guard does not interfere with the hob during the hob's rotation and cutting process, and maintains the closest distance to the hob's outer periphery, thereby effectively blocking the pencil shavings cut by the hob and improving chip guarding efficiency.

[0006] As an improvement, the chip guard is provided with a guide bevel adapted to the hob, and the guide bevel is used to guide and discharge the pencil shavings cut by the hob. In this technical solution, by providing the guide bevel on the chip guard, the pencil shavings cut by the hob can be discharged from the chip guard along the guide bevel when they reach the chip guard, thereby preventing the pencil shavings from entering the gap between the pencil blocking block and the pencil sharpening cavity, thereby improving the chip guarding efficiency.

[0007] As an improvement, the length direction of the chip guard is parallel to the length direction of the hob, and the chip guard covers the gap between the bottom of the pencil sharpening chamber and the bottom of the hob along the length direction. In this technical solution, the chip guard is arranged to be parallel to the hob, thereby avoiding interference between the chip guard and the hob during the rotation and cutting process of the hob. The chip guard is arranged to completely cover the gap between the bottom of the pencil sharpening chamber and the bottom of the hob along the length direction, preventing pencil chips generated after cutting by the hob from entering the gap between the bottom of the pencil sharpening chamber and the bottom of the hob and causing blockage. The structural design is more reasonable and reliable, and the chip guarding efficiency is improved.

[0008] As an improvement, the tool holder body is provided with a mounting portion for mounting a roller cutter, one end of the chip guard portion along the length direction is engaged with the bottom of the pencil sharpening chamber, and the other end of the chip guard portion along the length direction is engaged with the mounting portion; the chip guard portion is engaged with the tool holder body on one side along the width direction. In this technical solution, a mounting portion is provided on the tool holder body to limit the installation of the roller cutter, making the installation of the roller cutter simpler and more reliable. The chip guard portion is provided to engage the bottom of the pencil sharpening chamber and the mounting portion at both ends along the length direction respectively. The chip guard portion can engage the bottom of the pencil sharpening chamber and the bottom of the roller cutter to avoid the formation of a gap between the bottom of the pencil sharpening chamber and the bottom of the roller cutter; the chip guard portion is provided to engage with the tool holder body on one side along the width direction. The chip guard portion and the tool holder body are an integrally formed structure to avoid the formation of a gap between the chip guard portion and the tool holder body for pencil chips to enter. The structural design is more reasonable and reliable, and the chip guarding efficiency is improved.

[0009] As an improvement, the tool holder body is provided with a mounting cavity adapted to the pencil stop block, and the pencil stop block is installed in the mounting cavity. In this technical solution, the mounting cavity is provided on the tool holder body for installing the pencil stop block, making the installation of the pencil stop block on the tool holder body simple and reliable.

[0010] As an improvement, the mounting chamber is connected to the pencil sharpening chamber, and the chip stop is used to prevent pencil shavings from the roller from entering the mounting chamber. In this technical solution, the chip stop is provided on one side of the tool holder body, and the mounting chamber is provided on the other side of the tool holder body, so that the chip stop and the pencil block are distributed on both sides of the tool holder body. The mounting chamber is connected to the pencil sharpening chamber, and the chip stop can prevent pencil shavings from the roller from entering the mounting chamber and blocking the pencil block.

[0011] As an improvement, the tool holder body is provided with a chip sweeping portion, which is used to sweep away pencil shavings when the tool holder body rotates. In this technical solution, the tool holder assembly will generate a large amount of pencil shavings during use, and a large amount of pencil shavings will accumulate in the pencil sharpener. In particular, pencils with softer properties such as water-soluble colored pencils and sketch pencils are more likely to accumulate pencil shavings after cutting. By adding a chip sweeping portion to the tool holder body, the tool holder body drives the chip sweeping portion to rotate synchronously during the force rotation of the tool holder body. The rotation of the chip sweeping portion keeps the pencil shavings accumulated in the pencil sharpener loose and is not easy to accumulate in the installation cavity where the pencil block is located, thus avoiding clogging of the pencil block, avoiding problems such as inaccurate positioning of the pencil block, and breaking of the pencil tip and the pencil core, thereby improving the efficiency of pencil sharpening.

[0012] As an improvement, the chip sweeping part is arranged on the mounting cavity. In this technical solution, the chip sweeping part is arranged on the mounting cavity so that the chip sweeping part can sweep out the pencil chips near the mounting cavity, avoiding the accumulation of pencil chips in the mounting cavity and causing the pencil blocking block to be blocked, thereby improving the chip sweeping efficiency.

[0013] As an improvement, side panels are provided on both sides of the installation cavity, and at least one side panel extends outward to form a chip sweeping portion. In this technical solution, the chip sweeping portion is formed by extending outward from one side panel of the installation cavity, combining the chip sweeping portion with the installation cavity, simplifying the structure of the chip sweeping portion, and having a simple and ingenious structural design.

[0014] The present application may also provide a pencil sharpener comprising a tool holder assembly of any of the aforementioned pencil sharpeners. In this technical solution, the pencil sharpener utilizes the aforementioned tool holder assembly, which, by adding a chip stopper that engages with the sharpening chamber, prevents a gap from forming between the end of the sharpening chamber and the hob. This effectively prevents wood chips from entering the cavity where the pencil stopper is located, avoids problems such as inaccurate positioning of the pencil stopper, chipped tips, and broken cores, and thus improves pencil sharpening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a blade holder assembly of a pencil sharpener according to the present application.

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the chip guard portion of a tool holder assembly of a pencil sharpener according to the present application.

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the side where the pencil blocking block is located in the blade holder assembly of a pencil sharpener of the present application.

[0018] As shown in the figure: 1. Tool holder body; 11. Pen sharpening chamber; 12. Chip blocking part; 121. Guide slope; 13. Mounting chamber; 131. Side plate; 14. Chip sweeping part; 15. Mounting part; 2. Hob; 3. Pen blocking block. DETAILED DESCRIPTION

[0019] In order to better understand the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0020] 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.

[0021] It should also be understood that the terms "comprising," "including," "having," "containing," and "including," when used in this specification, indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or combinations thereof. The terms "first," "second," and the like are primarily used to distinguish between different devices, elements, or components (the specific types and configurations of which may be the same or different), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0022] In addition, it should be noted that the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements, or components; it can be directly set on another component or another intermediate component may exist at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the invention. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] like Figures 1 to 3 As shown, the present application discloses a tool holder assembly for a pencil sharpener, comprising a tool holder body 1 and a hob 2 mounted on the tool holder body 1, a tapered pen sharpening cavity 11 being provided on the tool holder body 1, a pencil blocking block 3 being mounted on the tool holder body 1 to match the pen sharpening cavity 11, the pen blocking block 3 being mounted on the tool holder body 1 to be able to adapt to cutting pens of different thicknesses, softness and hardness, a chip blocking portion 12 being mounted on the tool holder body 1 to be engaged with the pen sharpening cavity 11, the chip blocking portion 12 and the pencil blocking block 3 being distributed on both sides of the tool holder body 1, the chip blocking portion 12 being used to block pencil chips cut off by the hob 2 from entering the pencil blocking block 3 and the pen sharpening cavity 11 By arranging a chip stop portion 12 engaged with the pencil sharpening cavity 11 on the tool holder body 1, a gap is avoided between the end of the pencil sharpening cavity 11 and the hob 2, and the pencil shavings cut off by the hob 2 are prevented from entering the gap between the pencil blocking block 3 and the pencil sharpening cavity 11. In particular, pencils with softer properties such as water-soluble colored pencils and sketch pencils are more likely to have pencil shavings after cutting to enter the gap between the pencil blocking block 3 and the pencil sharpening cavity 11 and block the pencil blocking block 3. The effective blocking of the chip stop portion 12 can avoid the problems of inaccurate positioning of the pencil blocking block 3, broken pencil tips, and broken pencil cores, thereby improving the efficiency of pencil sharpening.

[0024] More specifically, Figure 1 and Figure 2 As shown, the chip blocking portion 12 is tangent to the outer periphery of the hob 2. By setting the chip blocking portion 12 tangent to the outer periphery of the hob 2, the chip blocking portion 12 will not interfere with the hob 2 during the rotation and cutting process of the hob 2, and will maintain the closest distance to the outer periphery of the hob 2, so as to effectively block the pencil shavings cut off by the hob 2 and improve the chip blocking efficiency.

[0025] More specifically, Figure 1 and Figure 2 As shown, the chip guard portion 12 is provided with a guide bevel 121 adapted to the hob 2, and the guide bevel 121 is used to guide and discharge the pencil chips cut off by the hob 2. By providing the guide bevel 121 on the chip guard portion 12, the pencil chips cut off by the hob 2 can be discharged from the chip guard portion 12 along the guide bevel 121 when they reach the chip guard portion 12, thereby preventing the pencil chips from entering the gap between the pencil blocking block 3 and the pencil sharpening cavity 11, thereby improving the chip guarding efficiency.

[0026] More specifically, Figure 1 and Figure 2 As shown, the length direction of the chip blocking portion 12 is parallel to the length direction of the hob 2, thereby preventing the chip blocking portion 12 from interfering with the hob 2 during the rotation and cutting process of the hob 2. The chip blocking portion 12 covers the gap between the bottom of the pencil sharpening chamber 11 and the bottom of the hob 2 along the length direction, preventing the pencil chips generated after cutting by the hob 2 from entering the gap between the bottom of the pencil sharpening chamber 11 and the bottom of the hob 2 and causing blockage. The structural design is more reasonable and reliable, and the chip blocking efficiency is improved.

[0027] More specifically, Figure 1 and Figure 2 As shown, the tool holder body 1 is provided with a mounting portion 15 for mounting the roller cutter 2, which makes the installation of the roller cutter 2 simpler and more reliable. The chip stopper 12 is engaged with the bottom of the pencil sharpening chamber 11 at one end along the length direction, and the other end of the chip stopper 12 is engaged with the mounting portion 15 along the length direction. The chip stopper 12 is provided with two ends along the length direction respectively engaged with the bottom of the pencil sharpening chamber 11 and the mounting portion 15. The chip stopper 12 can engage with the bottom of the pencil sharpening chamber 11 and the bottom of the roller cutter 2 to avoid the formation of a gap between the bottom of the pencil sharpening chamber 11 and the bottom of the roller cutter 2; the chip stopper 11 is engaged with the tool holder body 1 on one side along the width direction, and the chip stopper 12 and the tool holder body 1 are an integrally formed structure to avoid the formation of a gap between the chip stopper 11 and the tool holder body 1 for pencil chips to enter. The structural design is more reasonable and reliable, and the chip blocking efficiency is improved.

[0028] More specifically, Figure 3As shown, the tool holder body 1 is provided with a mounting cavity 13 adapted to the pen blocking block 3, and the pen blocking block 3 is installed in the mounting cavity 13. The mounting cavity 13 is provided on the tool holder body 1 for installing the pen blocking block 3, so that the installation of the pen blocking block 3 on the tool holder body 1 is simple and reliable.

[0029] More specifically, Figures 1 to 3 As shown, the mounting cavity 13 is connected to the pencil sharpening cavity 11, and the chip blocking portion 12 is used to prevent the pencil chips cut off by the roller 2 from entering the mounting cavity 13. The chip blocking portion 12 is arranged on one side of the tool holder body 1, and the mounting cavity 13 is arranged on the other side of the tool holder body 1, so that the chip blocking portion 12 and the pencil blocking block 3 are distributed on both sides of the tool holder body 1, and the mounting cavity 13 is connected to the pencil sharpening cavity 11. The chip blocking portion 12 can prevent the pencil chips cut off by the roller 2 from entering the mounting cavity 13 and blocking the pencil blocking block 3.

[0030] More specifically, Figure 1 and Figure 3 As shown, a chip sweeping portion 14 is provided on the tool holder body 1, and the chip sweeping portion 14 is used to sweep the pencil shavings when the tool holder body 1 rotates. The tool holder assembly will generate a large amount of pencil shavings during use, and a large amount of pencil shavings will accumulate in the pencil sharpener, especially water-soluble colored pencils, sketch pencils and other soft pencils. The pencil shavings generated after cutting are more likely to accumulate. By adding a chip sweeping portion 14 to the tool holder body 1, during the process of the tool holder body 1 being rotated under force, the tool holder body 1 drives the chip sweeping portion 14 to rotate synchronously. The rotation of the chip sweeping portion 14 keeps the pencil shavings accumulated in the pencil sharpener loose and is not easy to accumulate in the mounting cavity 13 where the pencil blocking block 3 is located, thereby avoiding clogging the pencil blocking block 3, avoiding problems such as inaccurate positioning of the pencil blocking block 3 and broken pencil tips and cores, thereby improving the efficiency of pencil sharpening.

[0031] At present, most pencil sharpeners on the market are mainly used to cut HB / 2B pencils. HB / 2B pencils are made of harder materials. Even if the knife holder assembly does not have the chip blocking part 12 and the chip sweeping part 14, the impact on the chipping and broken pencils of HB / 2B pencils is still relatively small. However, for softer pencils such as water-soluble colored pencils and sketch pencils, pencil chips are easily accumulated in the installation cavity 13 where the pencil blocking block 3 is located during the rolling process of the knife holder assembly, and problems such as chipping and broken pencils occur frequently. In the actual test of cutting, taking water-soluble colored pencils as an example, the knife holder assembly does not have the chip blocking part 12 and the chip sweeping part 14. When the tool holder assembly with the chip blocking portion 12 and the chip sweeping portion 14 is rolled, the tip breakage problem occurs during the 20th rolling. When the rolling is performed, the tip breakage problem begins to occur frequently after the pencil chips accumulate. The tip breakage ratio measured during rolling is 22%-30%. When the tool holder assembly with the chip blocking portion 12 and the chip sweeping portion 14 provided by the present application is rolled, the tip breakage problem occurs sporadically during 100 rolling processes. The tip breakage ratio measured during rolling is 5%-10%, which greatly reduces the probability of problems such as tip chipping and core breakage.

[0032] More specifically, Figure 1 and Figure 3 As shown, the chip sweeping portion 14 is arranged on the mounting cavity 13. The chip sweeping portion 14 is arranged in the mounting cavity 13 so that the chip sweeping portion 14 can sweep out the pencil chips near the mounting cavity 13, avoiding the accumulation of pencil chips in the mounting cavity 13 and causing the pencil blocking block 3 to be blocked, thereby improving the chip sweeping efficiency.

[0033] More specifically, Figure 1 and Figure 3 As shown, side panels 131 are provided on both sides of the installation cavity 13, and at least one side panel 131 extends outward to form a chip sweeping portion 14. The chip sweeping portion 14 is formed by extending outward from one side panel 131 of the installation cavity 13, and the chip sweeping portion 14 is combined with the installation cavity 13 to simplify the structure of the chip sweeping portion 14. The structural design is simple and ingenious.

[0034] This embodiment can also disclose a pencil sharpener, including the aforementioned tool holder assembly. The pencil sharpener adopts the aforementioned tool holder assembly. The tool holder assembly avoids the formation of a gap between the end of the pencil sharpening cavity 11 and the hob 2 by adding a chip blocking portion 12 engaged with the pencil sharpening cavity 11, and can effectively prevent wood chips from entering the cavity where the pencil blocking block 3 is located, avoid inaccurate positioning of the pencil blocking block 3 and problems such as chipped pencil tips and broken pencil cores, thereby improving pencil sharpening efficiency.

[0035] This application is not limited to the above-mentioned optimal implementation method. Anyone can derive various other forms of products based on the inspiration of this application. However, no matter what changes are made in their shape or structure, any technical solution that is the same or similar to that of this application falls within the scope of protection of this application.

Claims

1. A tool holder assembly for a pencil sharpener, comprising a tool holder body (1) and a hob (2) mounted on the tool holder body (1), wherein the tool holder body (1) is provided with a tapered pencil sharpening cavity (11), characterized in that: The tool holder body (1) is provided with a pencil blocking block (3) adapted to the pencil sharpening cavity (11); the tool holder body (1) is provided with a chip blocking portion (12) engaged with the pencil sharpening cavity (11); the chip blocking portion (12) and the pencil blocking block (3) are distributed on both sides of the tool holder body (1); the chip blocking portion (12) is used to block pencil chips cut off by the roller (2) from entering the gap between the pencil blocking block (3) and the pencil sharpening cavity (11).

2. The blade holder assembly of a pencil sharpener according to claim 1, characterized in that: The chip blocking portion (12) is tangent to the outer periphery of the hob (2).

3. A blade holder assembly for a pencil sharpener according to claim 1 or 2, characterized in that: The chip blocking portion (12) is provided with a guide slope (121) adapted to the roller cutter (2), and the guide slope (121) is used for guiding and discharging the pencil chips cut off by the roller cutter (2).

4. The blade holder assembly of a pencil sharpener according to claim 2, characterized in that: The length direction of the chip guard (12) is parallel to the length direction of the hob (2), and the chip guard (12) covers the gap between the bottom of the pencil sharpening cavity (11) and the bottom of the hob (2) along the length direction.

5. The blade holder assembly of a pencil sharpener according to claim 2 or 4, characterized in that: The tool holder body (1) is provided with a mounting portion (15) for mounting the hob (2); one end of the chip guard portion (12) along the length direction is engaged with the bottom of the pencil sharpening chamber (11); the other end of the chip guard portion (12) along the length direction is engaged with the mounting portion (15); and one side of the chip guard portion (12) along the width direction is engaged with the tool holder body (1).

6. A blade holder assembly for a pencil sharpener according to claim 1 or 2, characterized in that: The tool holder body (1) is provided with a mounting cavity (13) adapted to the pen-blocking block (3), and the pen-blocking block (3) is mounted in the mounting cavity (13).

7. The blade holder assembly of a pencil sharpener according to claim 6, characterized in that: The installation cavity (13) is communicated with the pencil sharpening cavity (11), and the chip blocking portion (12) is used to prevent pencil chips cut off by the hob (2) from entering the installation cavity (13).

8. The blade holder assembly of a pencil sharpener according to claim 6, characterized in that: The tool holder body (1) is provided with a chip sweeping portion (14), and the chip sweeping portion (14) is used to sweep away pencil chips when the tool holder body (1) rotates.

9. The blade holder assembly of a pencil sharpener according to claim 8, characterized in that: The chip sweeping portion (14) is arranged on the installation cavity (13); side plates (131) are arranged on both sides of the installation cavity (13), and at least one side plate (131) extends outward to form the chip sweeping portion (14).

10. A pencil sharpener, characterized in that: A blade holder assembly comprising a pencil sharpener according to any one of claims 1 to 9.

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