A sharpener assembly and automatic pencil sharpener thereof

Abstract

The utility model discloses a knife rest assembly and automatic pencil sharpener thereof, and the knife rest assembly comprises: a frame body, the frame body is equipped with the pencil sharpener mouth that can insert the pencil and the accommodating groove located below the pencil sharpener mouth, a pencil blocking block, the pencil blocking block is movably connected to the frame body and can move up and down in the accommodating groove, the pencil blocking block comprises a main part and an extension part, the main part extends in the plane parallel to the second direction and the third direction, can be in abutment with the pencil tip and shield the accommodating groove, the extension part is connected to the lower surface of the main part, from the end close to the main part to the end away from the main part along the first direction, the size of at least part of the extension part gradually reduces along the second direction, can form the ash containing space between the extension part and the groove wall of the accommodating groove, wherein, the first direction is parallel to the height direction of the frame body, the second direction is parallel to the width direction of the accommodating groove, the second direction is parallel to the depth direction of the accommodating groove, and the first direction, the second direction and the third direction are perpendicular respectively two two.

Description

Technical Field

[0001] This utility model relates to the field of automatic pencil sharpeners, specifically, a pencil sharpener assembly and its automatic pencil sharpener. Background Technology

[0002] An automatic pencil sharpener is a new type of stationery. It works by starting a motor when a pencil is inserted, causing the blade holder to rotate and thus begin sharpening the pencil automatically, replacing the traditional hand-cranked sharpener.

[0003] In related technologies, when an automatic pencil sharpener is working, the user inserts one end of a pencil. The pencil pushes the blade holder and the starting shaft downwards together to start the motor. This, in turn, drives the blade holder assembly to perform a planetary cutting motion around the pencil, beginning the sharpening process. At this time, the pencil stop block moves upwards relative to the blade holder. After the pencil is sharpened, the pencil tip rests against the pencil stop block. The user continues to push the pencil, causing the blade holder and pencil stop block to move downwards together. The pencil stop block then pushes the delay shaft downwards, and the delay component begins to work to smooth the pencil tip. Subsequently, the motor stops, completing the sharpening process. After the user removes the pencil, during the upward reset of the blade holder, the pencil stop block moves downwards relative to the blade holder. However, the presence of foreign objects such as sawdust and lead dust beneath the pencil stop block makes it difficult for it to fully reset, affecting the normal operation of the automatic pencil sharpener. Utility Model Content

[0004] One objective of this invention is to provide a tool holder assembly in which the pen block can be smoothly reset, thereby improving the reliability and stability of the tool holder assembly.

[0005] Another objective of this invention is to provide an automatic pencil sharpener having the aforementioned blade holder assembly.

[0006] To achieve at least one of the above objectives, the technical solution adopted by this utility model is as follows: a pencil holder assembly, comprising: a frame, the frame having a pencil sharpening opening for inserting a pencil, and a receiving groove located below the pencil sharpening opening; a pencil stop block, the pencil stop block being movably connected to the frame and being able to move up and down within the receiving groove; the pencil stop block comprising a main body and an extension, the main body extending in a plane parallel to a second direction and a third direction, being able to abut against the pencil tip and block the receiving groove; the extension being connected to the lower surface of the main body, extending along a first direction from one end near the main body to one end away from the main body, at least a portion of the extension gradually decreasing in size along the second direction, thereby forming a dust-collecting space between the extension and the groove wall of the receiving groove; wherein, the first direction is parallel to the height direction of the frame, the second direction is parallel to the width direction of the receiving groove, the third direction is parallel to the depth direction of the receiving groove, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0007] As a preferred embodiment, the extension includes a straight section and a pointed section, the straight section connecting the main body and the pointed section; the dimension of the straight section along the second direction is smaller than the dimension of the main body along the second direction, and the straight section is connected to the middle of the main body along the second direction; along the first direction from one end near the straight section to one end away from the straight section, the dimension of the pointed section along the second direction gradually decreases, so that the sidewalls of the pointed section disposed opposite each other along the second direction move closer to the centerline.

[0008] As a preferred embodiment, the pointed segment includes two first inclined surfaces arranged opposite each other along a second direction, the two first inclined surfaces intersecting at the sides away from the straight segment to form a "V" shape, such that the size of the pointed segment gradually decreases along the second direction from the end near the straight segment to the end away from the straight segment.

[0009] As a preferred embodiment, the frame has a dust-sealing surface on the side facing the pen block, and the pen block further includes a dust-blocking part. The dust-blocking part is connected to the main body and the extension, and is arranged opposite to the dust-sealing surface in a third direction. The dust-blocking part has a second inclined surface on the side away from the main body, and the second inclined surface is inclined away from the dust-sealing surface.

[0010] As a preferred embodiment, the ash-sealing surface has a groove, and the bottom surface of the frame has a through hole through which the delay shaft passes, the through hole being connected to the groove; the ash-blocking part of the pen block has a protrusion that extends into the groove, allowing it to move along the groove and block it; the lower surface of the protrusion abuts against the delay shaft.

[0011] As a preferred embodiment, the protrusion includes two third inclined surfaces disposed opposite each other along a second direction, the third inclined surfaces being inclined toward the sidewall of the groove, such that at least a portion of the protrusion gradually decreases in size along the second direction from top to bottom along a first direction.

[0012] As a preferred embodiment, the frame is provided with a ash discharge trough, which is located below the receiving trough and is in communication with the ash receiving space.

[0013] As a preferred embodiment, the tool holder assembly further includes a guide member, and the pen block has a connecting hole. The pen block is sleeved on the guide member through the connecting hole, so that the pen block moves up and down along the guide member within the receiving groove.

[0014] As a preferred embodiment, the pencil stop includes a base component and a reinforcing member fixed to the base component. The base component includes a main body portion and an extension portion, and the base component is made of plastic. At least a portion of the reinforcing member is exposed on the upper surface of the main body portion so as to abut against the pencil tip, and the reinforcing member is made of metal.

[0015] To achieve at least one of the above objectives, the technical solution adopted by this utility model is: an automatic pencil sharpener, including the blade holder assembly as described above.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] (1) The main body covers the receiving groove to reduce the amount of foreign objects such as wood chips and lead dust falling under the pen block.

[0018] (2) Along the first direction from the end near the main body to the end away from the main body, at least part of the extension gradually decreases in size along the second direction. As a result, when the pen block moves downward in the receiving groove, the end of the extension can push away the wood chips and lead ash, so that the wood chips and lead ash are contained in the ash-containing space, and the pen block can be smoothly moved down and reset, thereby improving the reliability and stability of the tool holder assembly. Attached Figure Description

[0019] Figure 1 This is a perspective structural diagram of a tool holder assembly according to some embodiments of this application.

[0020] Figure 2 This is a cross-sectional view of a tool holder assembly according to some embodiments of this application.

[0021] Figure 3 This is a three-dimensional structural diagram of a pen block according to some embodiments of this application.

[0022] Figure 4 This is a schematic diagram of the back of the pen block in its initial position according to some embodiments of this application.

[0023] Figure 5 This is a front view of the pen block in its initial position according to some embodiments of this application.

[0024] Figure 6 This is a schematic diagram of the back of the pen block in the working position according to some embodiments of this application.

[0025] Figure 7 This is a front view of the pen block in its working position according to some embodiments of this application.

[0026] In the diagram: 1. Tool holder assembly; 10. Frame; 11. Pen tip; 12. Receiving groove; 13. Ash holding space; 14. Ash discharge groove; 15. Ash sealing surface; 16. Groove; 17. Through hole; 18. Guide component; 20. Pen block; 21. Main body; 22. Extension; 221. Straight section; 222. Pointed section; 223. First inclined surface; 23. Ash blocking part; 231. Second inclined surface; 24. Protrusion; 241. Third inclined surface; 25. Connecting hole; 26. Base component; 27. Reinforcing component; 30. Hob. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] In the description of this utility model, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0029] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0030] A tool holder assembly 1, such as Figures 1-7 As shown, it includes a frame 10 and a pencil stop block 20. The frame 10 has a pencil sharpening opening 11 for inserting a pencil, and a receiving groove 12 located below the pencil sharpening opening 11. The pencil stop block 20 is movably connected to the frame 10 and can move up and down within the receiving groove 12. Further, as... Figure 1 and Figure 3As shown, the pencil stop block 20 includes a main body 21 and an extension 22. The main body 21 extends in a plane parallel to the second and third directions, so as to abut against the pencil tip and block the receiving groove 12, thereby reducing the amount of foreign matter such as sawdust and lead dust falling into the pencil stop block 20. The extension 22 is connected to the lower surface of the main body 21 and extends along the first direction from the end near the main body 21 to the end away from the main body 21. At least a portion of the extension 22 gradually decreases in size along the second direction, so as to form a dust-containing space 13 between the extension 22 and the groove wall of the receiving groove 12. When the pencil stop block 20 moves downward in the receiving groove 12, the end of the extension 22 can push away the sawdust and lead dust, so that the sawdust and lead dust are contained in the dust-containing space 13, thereby allowing the pencil stop block 20 to move down and reset smoothly, improving the reliability and stability of the pencil holder assembly 1.

[0031] The first direction is parallel to the height direction of the frame 10, the second direction is parallel to the width direction of the receiving groove 12, the third direction is parallel to the depth direction of the receiving groove 12, and the first direction, the second direction and the third direction are perpendicular to each other.

[0032] In some embodiments, such as Figure 1 As shown, the pencil holder assembly 1 also includes a hob cutter 30, which is located beside the pencil sharpening 11 to cut pencils. The hob cutter 30 and the pencil stop block 20 are arranged along a third direction, which helps to make the overall structure of the pencil holder assembly 1 more compact while avoiding interference between the hob cutter 30 and the pencil stop block 20.

[0033] In some embodiments, such as Figures 1-3 As shown, the tool holder assembly 1 also includes a guide member 18, and a pen stop block 20 has a connecting hole 25. The pen stop block 20 is sleeved on the guide member 18 through the connecting hole 25, so that the pen stop block 20 can move up and down along the guide member 18 within the receiving groove 12. It should be understood that the guide member 18 can be used as follows: Figure 2 The pencil stop block 20 is tilted in the first direction, so that when it moves upward along the guide 18 to the working position, it is close to the bottom of the pencil sharpening 11. This helps ensure that the pencil tip abuts against the main body 21 of the pencil stop block 20. When the pencil stop block 20 moves downward along the guide 18 to the initial position, it avoids the frame 10, which helps to prevent interference between the pencil stop block 20 and the frame 10 and the cutting tool 30. This makes the overall structure of the tool holder assembly 1 more compact. It is worth mentioning that the guide 18 can extend in the first direction to allow the pencil stop block 20 to move up and down in the first direction. This application does not impose specific limitations on this.

[0034] In some embodiments, such as Figure 3As shown, the extension 22 includes a straight section 221 and a pointed section 222. The straight section 221 connects the main body 21 and the pointed section 222. The dimension of the straight section 221 in the second direction is smaller than the dimension of the main body 21 in the second direction. The straight section 221 is connected to the middle of the main body 21 in the second direction. From the end near the straight section 221 to the end away from the straight section 221 in the first direction, the dimension of the pointed section 222 in the second direction gradually decreases, so that the sidewalls of the pointed section 222, which are disposed opposite to each other in the second direction, move closer to the centerline.

[0035] It should be understood that, compared to the extension 22 having only a pointed section 222, in this embodiment, the main body 21 and the pointed section 222 are connected by a straight section 221, which enhances the structural strength of the pen block 20. Especially when the connecting hole 25 penetrates the pen block 20, the straight section 221 makes the thickness of the hole wall of the connecting hole 25 more uniform and increases the mating length between the pen block 20 and the guide member 18, thereby improving the stability of the pen block 20 sliding along the guide member 18.

[0036] Furthermore, the dimension of the straight section 221 along the second direction is smaller than the dimension of the main body 21 along the second direction, and the straight section 221 is connected to the middle of the main body 21 along the second direction, thereby forming a dust-containing space 13 between the straight section 221 and the groove wall of the receiving groove 12. In other words, a larger space is provided to accommodate wood chips and lead dust. In addition, the structure of the pen block 20 is made more symmetrical, which helps to reduce the stress concentration phenomenon of the pen block 20.

[0037] Furthermore, along the first direction from the end near the straight section 221 to the end away from the straight section 221, the size of the pointed section 222 gradually decreases along the second direction, so that the side wall of the pointed section 222, which is set opposite to the straight section 221, moves closer to the center line. Thus, when the pen block 20 moves downward relative to the frame 10, it can be inserted into the wood chips and lead putty through the pointed section 222, while pushing the wood chips and lead putty to both sides, so that the wood chips and lead putty are contained in the putty space 13, and the pen block 20 can be successfully reset.

[0038] In some embodiments, such as Figure 3 and Figure 4 As shown, the pointed segment 222 includes two first inclined surfaces 223 arranged opposite each other along the second direction. The sides of the two first inclined surfaces 223 away from the straight segment 221 intersect to form a "V" shape, such that the size of the pointed segment 222 gradually decreases along the second direction from the end near the straight segment 221 to the end away from the straight segment 221 along the first direction.

[0039] It is understandable that if the end of the pointed segment 222 were flat, wood chips and lead dust might be located below the flat surface when the pen block 20 moves downward, thus hindering the pen block 20 from returning to its initial position. In this embodiment, the sides of the two first inclined surfaces 223 away from the straight segment 221 intersect, and the cross-section of the pointed segment 222 perpendicular to the third direction is triangular, that is, the end of the pointed segment 222 is a straight line extending along the third direction. Therefore, when the pen block 20 moves downward relative to the frame 10, it can more fully push the wood chips and lead dust to both sides, reducing the risk of wood chips and lead dust being located below the pointed segment 222, thus allowing the pen block 20 to return to its initial position more smoothly.

[0040] It is worth mentioning that the cross section of the pointed segment 222 perpendicular to the third direction can also be an inverted trapezoid, a semicircle, a parabola, etc., and this application does not impose specific restrictions on this.

[0041] In some embodiments, such as Figure 3 , Figure 5 and Figure 7 As shown, the frame 10 has a ash-sealing surface 15 on the side facing the pen block 20. The pen block 20 also includes an ash-blocking part 23, which is connected to the main body 21 and the extension 22, and is arranged opposite to the ash-sealing surface 15 in a third direction. The ash-blocking part 23 has a second inclined surface 231 on the side away from the main body 21, and the second inclined surface 231 is inclined away from the ash-sealing surface 15. It should be understood that the ash-sealing surface 15 and the ash-blocking part 23 are arranged opposite to each other and have an appropriate assembly gap, which is beneficial to avoid interference between the ash-blocking part 23 and the ash-sealing surface 15 and the roller cutter 30, and can also reduce the entry of sawdust and lead ash from between the ash-sealing surface 15 and the ash-blocking part 23 into the receiving groove 12.

[0042] Furthermore, such as Figure 3 As shown, the dust-blocking part 23 connects the main body 21 and the extension 22. By avoiding gaps between the dust-blocking part 23, the main body 21, and the extension 22, the risk of the pen block 20 being unable to move smoothly due to wood chips getting stuck in the gaps is reduced. Furthermore, the dust-blocking part 23 is provided with a second inclined surface 231, which is inclined away from the dust-sealing surface 15. When the pen block 20 moves downward relative to the frame 10, the second inclined surface 231 pushes the wood chips and lead dust towards the dust-collecting spaces 13 on both sides of the extension 22, reducing the risk of wood chips and lead dust being located below the dust-blocking part 23. This facilitates the pen block 20 returning to its initial position more smoothly.

[0043] In some embodiments, such as Figure 2 and Figure 3As shown, the sealing surface 15 has a groove 16, and the bottom surface of the frame 10 has a through hole 17 for the delay shaft to pass through, which is connected to the groove 16. The dust-blocking part 23 of the pen block 20 has a protrusion 24 that extends into the groove 16, allowing it to move along the groove 16 and block the groove 16, thereby reducing the amount of foreign matter such as sawdust and lead dust falling below the protrusion 24. The lower surface of the protrusion 24 abuts against the delay shaft to push the delay shaft to move in the first direction. It is worth mentioning that the cooperation between the groove 16 and the protrusion 24 also makes the structure of the tool holder assembly 1 more compact.

[0044] In some embodiments, such as Figure 3 As shown, the protrusion 24 includes two third inclined surfaces 241 arranged opposite each other along the second direction. The third inclined surfaces 241 are inclined toward the sidewall of the groove 16, such that along the first direction from top to bottom ( Figure 3 (The direction shown is from bottom to top), at least a portion of the protrusion 24 gradually decreases in size along the second direction. It should be understood that the third inclined surface 241 can push the wood chips and lead ash to both sides of the protrusion 24, which is beneficial for the wood chips and lead ash to enter the ash-containing space 13 formed by the extension 22, the ash-blocking part 23 and the groove wall of the receiving groove 12.

[0045] In at least one embodiment, such as Figure 3 and Figure 7 As shown, the protrusion 24 is connected to the lower part of the dust blocking part 23. When the pen blocking block 20 moves upward relative to the frame 10 to the working position, the upper surface of the protrusion 24 is flush with or slightly lower than the upper surface of the boss of the frame 10, which helps to avoid interference between the protrusion 24 and the hobbing cutter 30 installed on the boss.

[0046] In some embodiments, such as Figure 1 , Figure 4 and Figure 6 As shown, the frame 10 has a dust discharge trough 14, which is located below the receiving groove 12 and communicates with the dust receiving space 13. It should be understood that sawdust and lead dust in the dust receiving space 13 can be discharged through the dust discharge trough 14 to reduce the accumulation of sawdust and lead dust. It is worth mentioning that when the pen-blocking block 20 moves downward relative to the frame 10, the pointed section 222 of the extension 22 pushes the sawdust and lead dust to both sides. Simultaneously, as the main body 21 moves downward, the dust receiving space 13 gradually decreases, which helps to squeeze the sawdust and lead dust into the dust discharge trough 14 and discharge it through the trough 14. This allows the pen-blocking block 20 to return to its original position smoothly, improving the reliability and stability of the knife holder assembly 1.

[0047] In some embodiments, such as Figure 2 , Figure 5 and Figure 7As shown, the pencil stop block 20 includes a base component 26 and a reinforcing member 27 fixed to the base component 26. The base component 26 includes a main body 21, an extension 22, a dust-blocking part 23, and a protrusion 24. The base component 26 is made of plastic and can be molded by injection molding or other methods, thereby reducing the manufacturing difficulty of the base component 26 and helping to save manufacturing costs. At least a portion of the reinforcing member 27 is exposed on the upper surface of the main body 21, allowing it to abut against the pencil tip. The reinforcing member 27 is made of metal, thereby increasing the strength of the part of the pencil stop block 20 that contacts the pencil tip, which helps to reduce wear on the pencil stop block 20, extend its service life, and improve the reliability and stability of the pencil holder assembly 1. In at least one embodiment, the reinforcing member 27 is made of zinc alloy, which helps to reduce the weight of the pencil stop block 20 and save manufacturing costs while ensuring sufficient strength of the reinforcing member 27.

[0048] An automatic pencil sharpener includes the aforementioned blade holder assembly 1. The specific working process of the automatic pencil sharpener is as follows: When the automatic pencil sharpener is working, the user inserts one end of a pencil. The pencil pushes the holder 10 and the starter shaft downwards together to start the motor, which in turn drives the assembly to rotate the holder 10. The roller cutter 30 then performs a planetary cutting motion around the pencil, beginning the sharpening process. At this time, the pencil stop block 20 moves upwards within the receiving groove 12 to the working position, as shown below. Figure 6 and Figure 7 As shown. Further, after the pencil is sharpened, the pencil tip rests against the pencil stop block 20. The user continues to push the pencil, and the frame 10 and pencil stop block 20 move downwards together. The pencil stop block 20 pushes the delay shaft downwards in the first direction, and the delay component begins to work to smooth the pencil tip. Then the motor stops, thus completing the sharpening process. Further, after the user pulls out the pencil, during the upward repositioning of the frame 10, the pencil stop block 20 moves downwards within the receiving groove 12. Simultaneously, the extension 22 pushes away the wood chips and lead dust below, allowing them to be discharged from the dust discharge groove 14 into the dust holding space 13. This allows the pencil stop block 20 to smoothly return to its initial position, as shown. Figure 4 and Figure 5 As shown.

[0049] The basic principles, main features, and advantages of this utility model have been described above. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tool holder assembly, characterized in that, include: The frame has a pencil sharpening opening for inserting a pencil and a receiving slot located below the pencil sharpening opening; A pencil stop block is movably connected to the frame and can move up and down within the receiving groove. The pencil stop block includes a main body and an extension. The main body extends in a plane parallel to a second direction and a third direction, so as to abut against the pencil tip and block the receiving groove. The extension is connected to the lower surface of the main body and extends along a first direction from near the main body to away from the main body. At least a portion of the extension gradually decreases in size along the second direction, so as to form a dust-collecting space between the extension and the groove wall of the receiving groove. The first direction is parallel to the height direction of the frame, the second direction is parallel to the width direction of the receiving groove, the third direction is parallel to the depth direction of the receiving groove, and the first direction, the second direction, and the third direction are perpendicular to each other.

2. The tool holder assembly according to claim 1, characterized in that, The extension includes a straight section and a pointed section, the straight section connecting the main body and the pointed section; the dimension of the straight section along the second direction is smaller than the dimension of the main body along the second direction, and the straight section is connected to the middle of the main body along the second direction; along the first direction from one end near the straight section to one end away from the straight section, the dimension of the pointed section along the second direction gradually decreases, so that the sidewalls of the pointed section opposite each other along the second direction move closer to the centerline.

3. The tool holder assembly according to claim 2, characterized in that, The pointed segment includes two first inclined surfaces arranged opposite each other along a second direction. The two first inclined surfaces intersect at the sides away from the straight segment to form a "V" shape, such that the size of the pointed segment gradually decreases along the second direction from the end near the straight segment to the end away from the straight segment.

4. The tool holder assembly according to claim 1, characterized in that, The frame has a dust-sealing surface on the side facing the pen block. The pen block also includes a dust-blocking part. The dust-blocking part is connected to the main body and the extension, and is arranged opposite to the dust-sealing surface in a third direction. A second inclined surface is provided on the side of the dust-blocking part away from the main body. The second inclined surface is inclined away from the dust-sealing surface.

5. The tool holder assembly according to claim 4, characterized in that, The sealing surface has a groove, and the bottom surface of the frame has a through hole through which the delay shaft passes, and the through hole is connected to the groove; the dust-blocking part of the pen block has a protrusion that extends into the groove, moves along the groove, and blocks the groove; the lower surface of the protrusion abuts against the delay shaft.

6. The tool holder assembly according to claim 5, characterized in that, The protrusion includes two third inclined surfaces arranged opposite each other along a second direction. The third inclined surfaces are inclined toward the sidewall of the groove, such that at least a portion of the protrusion gradually decreases in size along the second direction from top to bottom along a first direction.

7. The tool holder assembly according to any one of claims 1-6, characterized in that, The frame is provided with a ash discharge trough, which is located below the receiving trough and is connected to the ash receiving space.

8. The tool holder assembly according to any one of claims 1-6, characterized in that, The tool holder assembly also includes a guide member, and the pen block has a connecting hole. The pen block is sleeved on the guide member through the connecting hole, so that the pen block moves up and down along the guide member in the receiving groove.

9. The tool holder assembly according to any one of claims 1-6, characterized in that, The pencil stop block includes a base component and a reinforcing member fixed to the base component. The base component includes a main body and an extension portion, and the base component is made of plastic. At least a portion of the reinforcing member is exposed on the upper surface of the main body to abut against the pencil tip, and the reinforcing member is made of metal.

10. An automatic pencil sharpener, characterized in that, Includes the tool holder assembly as described in any one of claims 1-9.

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