A cutting chip assembly which is easy to cut and a pencil sharpener having the same

Abstract

A convenient chip-cutting assembly and a pencil sharpener incorporating the assembly are disclosed. The chip-cutting assembly includes a blade holder positioned and mounted on the pencil sharpener, the blade holder having a transmission component capable of controlling the unidirectional reverse motion of the blade holder relative to the pencil sharpener housing; and a blade holder mounted on the blade holder. An internal shell of the chip-cutting assembly is provided, containing a chip collection chamber and an opening at at least one end serving as the cutting end of the pencil sharpener. The inner wall of the top of the chip collection chamber has a radially extending connecting portion, through which the shell positions and mounts the chip-cutting assembly at the opening. The chip-cutting assembly provided by this invention achieves unidirectional reverse motion with the pencil sharpener body by incorporating a pawl or ratchet, enabling reciprocating cutting of the pencil. This simplifies operation and eliminates the need for frequent angle adjustments. The pencil sharpener with this chip-cutting assembly not only achieves continuous reciprocating cutting but also increases the pencil cutting rate by reducing the ineffective cutting stroke of the pencil sharpener, thereby increasing the final cutting utilization rate of the pencil.

Description

Technical Field

[0001] This invention belongs to the field of pencil sharpener technology, specifically relating to a convenient cutting component and a pencil sharpener having the component. Background Technology

[0002] A pencil sharpener is a common stationery device that uses a cutting motion to shape the wood coating and lead of a pencil into a tapered profile suitable for writing. Manual pencil sharpeners often employ a ratchet-driven mechanism to allow the cutting blades to operate intermittently.

[0003] While existing ratchet-type unidirectional pencil sharpeners can achieve unidirectional reciprocating cutting of pencils, the placement of the ratchet mechanism means that after the pencil shaft enters through the cutting port at the top of the sharpener, it must travel a distance from the inlet to the actual contact point with the blade before it can be effectively cut. This often results in a 1cm to 2cm unused travel distance during the cutting process, leading to wasted pencil shaft and reduced effective cutting length. Furthermore, the traditional structure requires frequent adjustment of the angle during cutting, impacting efficiency. Summary of the Invention

[0004] (a) Technical problems to be solved In view of the shortcomings of the prior art, the purpose of this invention is to provide a convenient cutting component and a pencil sharpener having the component, so as to solve the existing problems. (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a convenient cutting chip assembly, comprising a chip assembly for cutting a workpiece, wherein the chip assembly includes: A blade holder is positioned and installed on a pencil sharpener, and the blade holder is provided with a transmission component that can control the blade holder to perform unidirectional reverse transmission relative to the pencil sharpener housing; A tool holder mounted on a tool holder, the top of which has a cutting surface near the horizontal plane of the cutting end of the pencil sharpener, and an insertion hole opened on the cutting surface; When the workpiece is inserted into the tool holder for cutting, a cutting surface is generated on the workpiece, which varies along the axial displacement of the workpiece according to the cutting insertion length. This cutting surface is parallel to any radial surface of the workpiece. When the cutting surface and the cutting surface are on the same horizontal plane, the workpiece obtains the maximum effective cutting length.

[0005] As a further improvement, the blade holder is also provided with a limiting part that abuts against the inner wall of the pencil sharpener, and is positioned and installed on the pencil sharpener through the limiting part.

[0006] As a further improvement, the limiting part includes a plurality of first limiting blocks and / or second limiting blocks that extend radially along the outer edge of the tool holder and abut against the inner wall of the pencil sharpener.

[0007] As a further improvement, the transmission component includes a positioning component disposed between the pencil sharpener and the chip assembly, and an elastic component that is in transmission cooperation with the positioning component to enable the chip assembly to perform unidirectional reverse motion relative to the pencil sharpener.

[0008] As a further improvement, the positioning element is composed of multiple positioning structures that can restrict the rotation of the elastic element, and the elastic element is composed of at least one elastic body that can rotate relative to the multiple positioning structures to produce elastic deformation, thereby causing at least one elastic body to continuously retract and reset between the multiple positioning structures.

[0009] As a further improvement, the elastomer is a pawl, and the positioning structure is a ratchet with a toothed surface that can engage with the pawl and rotate in one direction.

[0010] As a further improvement, the tool holder is provided with a cutting cavity communicating with the insertion hole, and a cutting blade fixedly installed on the tool holder for cutting the object in the cutting cavity. The tool post is provided with a mounting groove, and the tool holder is installed on the tool post through the mounting groove. The top surface of the cutting blade is set to fit against the top surface of the tool post or the tool holder to obtain a cutting surface with the maximum effective cutting length.

[0011] A pencil sharpener, including the aforementioned easy-to-cut chip assembly, further includes: The device has an internal housing for the chip assembly, which contains a chip collection chamber and an opening at at least one end that serves as the cutting end of the pencil sharpener. The inner wall of the top of the chip collection chamber has a connecting portion that extends radially for positioning and installing the chip assembly at the opening.

[0012] As a further improvement, the top of the housing is also provided with a decorative cover, which has a cutting edge corresponding to the insertion hole of the tool holder in an axial manner, so as to reduce the distance between the cutting edge and the insertion hole.

[0013] As a further improvement, the decorative cover is provided with a mating part, which can be selectively mated and fixed with the tool holder or the outer shell, thereby enabling the decorative cover to be in a state that is fixed relative to the outer shell, moves independently relative to the outer shell, or moves synchronously with the tool holder relative to the outer shell.

[0014] As a further improvement, when the workpiece is inserted into the cutting edge for cutting, another ineffective surface is generated on the workpiece, which varies along the axial displacement of the workpiece according to the cutting insertion length. The ineffective cutting length is between the cut surface and the ineffective surface, and the range of the ineffective cutting length is 0-5mm.

[0015] As a further improvement, the top of the decorative cover is an arc-shaped surface with its edge inclined toward the central cutting opening, so that the cutting opening fits into the insertion hole near the tool holder.

[0016] As a further improvement, the tool holder is provided with a first limiting block and a second limiting block, and a movable groove that abuts and adapts to the connecting part is provided between the two.

[0017] As a further improvement, the tool holder is provided with a first limiting block, and the tool holder abuts against the connecting part through the first limiting block.

[0018] As a further improvement, a dustproof component is rotatably provided on the decorative cover. The dustproof component includes a rotating shaft, one end of which is provided with a dustproof cover and the other end with a pivot hole. A limiting platform is provided at the bottom of the dustproof cover. The decorative cover is provided with a limiting groove adapted to the limiting platform and a pivot that rotates with the pivot hole. The cutting edge is provided on the bottom wall of the limiting groove.

[0019] As a further improvement, the tool holder is provided with a pawl, and the decorative cover or outer shell is provided with a plurality of ratchet teeth that mesh with the pawl; or, the tool holder is provided with a plurality of ratchet teeth, and the decorative cover or outer shell is provided with a pawl that meshes with the plurality of ratchet teeth.

[0020] As a further improvement, the top of the housing is detachably provided with a set of connectors, the bottom of which is provided with a plurality of guide grooves, at least one positioning strip in each guide groove, and a guide strip in the inner wall of the housing that fits into the guide grooves, and a positioning groove on the guide strip that fits into the positioning strip.

[0021] As a further improvement, the connecting part is located on the top inner wall of the assembly, the mating part is located on the bottom inner wall of the decorative cover, and the top of the assembly is also provided with an annular fixing groove that engages with the mating part on the inner wall of the decorative cover. The decorative cover rotates relative to the outer shell through the mating part and the annular fixing groove.

[0022] As a further improvement, an annular strip extends axially from the connecting portion, and multiple ratchet teeth are provided on the connecting portion between the annular strip and the inner wall of the outer casing.

[0023] As a further improvement, the bottom of the housing is detachably provided with a chip collection cover, the inner wall of the chip collection cover is provided with at least one buckle, and the bottom of the housing is provided with an annular groove adapted to the buckle.

[0024] (III) Beneficial Effects The beneficial effects of this invention are as follows: The chip-cutting assembly provided by this invention achieves unidirectional reverse motion with the pencil sharpener body by setting a pawl or ratchet, so that the pencil and other objects to be cut can be reciprocated by both hands, which is simple to operate and does not require frequent angle adjustment; the pencil sharpener with this chip-cutting assembly can not only achieve continuous reciprocating cutting, but also reduce the ineffective cutting stroke between the cutting edge at the top of the pencil sharpener and the actual contact cutting surface of the blade holder, so as to have a larger effective cutting length, increase the pencil cutting rate, and correspondingly improve the final cutting utilization rate of the pencil, thereby increasing the effective utilization length of a single pencil. Attached Figure Description

[0025] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a chip-cutting assembly according to an embodiment of the present invention; Figure 2 An exploded view of a chip-cutting assembly according to an embodiment of the present invention. Figure 1 ; Figure 3 An exploded view of a chip-cutting assembly according to an embodiment of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the overall structure of the pencil sharpener according to Embodiment 1 of the present invention; Figure 5 This is an exploded view of the pencil sharpener according to Embodiment 1 of the present invention; Figure 6 This is a cross-sectional view of a pencil sharpener according to Embodiment 1 of the present invention; Figure 7 This is a partial cross-sectional view of a pencil sharpener according to Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the overall structure of the pencil sharpener according to Embodiment 2 of the present invention; Figure 9 This is an exploded view of the pencil sharpener according to Embodiment 2 of the present invention; Figure 10 This is a cross-sectional view of a pencil sharpener according to Embodiment 2 of the present invention; Figure 11 This is a partial cross-sectional view of a pencil sharpener according to Embodiment 2 of the present invention; Figure 12 This is a schematic diagram of the overall structure of the pencil sharpener according to Embodiment 3 of the present invention; Figure 13 This is a schematic diagram of the exploded structure of a pencil sharpener according to Embodiment 3 of the present invention. Figure 1 ; Figure 14 This is a cross-sectional view of a pencil sharpener according to Embodiment 3 of the present invention; Figure 15 This is a partial cross-sectional view of a pencil sharpener according to Embodiment 3 of the present invention; Figure 16 This is a schematic diagram of the exploded structure of a pencil sharpener according to Embodiment 3 of the present invention. Figure 2 ; Figure 17 This is a schematic diagram of the overall structure of the pencil sharpener according to Embodiment 4 of the present invention; Figure 18 This is an exploded view of the pencil sharpener according to Embodiment 4 of the present invention; Figure 19 This is a cross-sectional view of a pencil sharpener according to Embodiment 4 of the present invention; Figure 20 This is a partial cross-sectional view of a pencil sharpener according to Embodiment 4 of the present invention; Figure 21 This is a schematic diagram of the assembly component according to Embodiment 4 of the present invention; Figure 22 This is a schematic diagram of the overall structure of the pencil sharpener according to Embodiment 5 of the present invention; Figure 23 A schematic diagram of the exploded structure of a pencil sharpener according to Embodiment 5 of the present invention. Figure 1 ; Figure 24 This is a cross-sectional view of a pencil sharpener according to Embodiment 5 of the present invention; Figure 25 A schematic diagram of the exploded structure of a pencil sharpener according to Embodiment 5 of the present invention. Figure 2 ; Figure 26 This is a pencil cutting cross-sectional view of the chip assembly according to an embodiment of the present invention; Figure 27 This is a cross-sectional view of a pencil sharpener containing a chipping component according to an embodiment of the present invention.

[0026] Explanation of key figure labels: 1. Outer shell; 10. Connecting part; 11. Annular bar; 12. Chip collection bin; 121. Guide bar; 122. Positioning groove; 13. Assembly piece; 131. Guide groove; 1310. Guide opening; 132. Positioning bar; 133. Annular fixing groove; 14. Annular groove; 2. Chip collector cover; 21. Snap fastener; 3. Tool holder; 30. Transmission component; 301. Pawl; 302. Ratchet; 31. First limit block; 32. Second limit block; 33. Movable groove; 34. Mounting groove; 35. Shaft bracket; 4. Tool holder; 40. Cutting surface; 41. Hole; 410. Cutting cavity; 411. Insert; 5. Decorative cover; 50. Cutting edge; 51. Mating part; 52. Limiting groove; 53. Pivot; 54. Actuating part; 6. Dustproof parts; 61. Rotating shaft; 62. Dust cover; 63. Pivot hole; 64. Limiting platform; 7. Pencil; 70. Surface being cut; 71. Ineffective surface. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0028] Example 1 like Figures 1-3 , Figure 26 As shown, a convenient chip-cutting assembly according to an embodiment of the present invention will be described in detail. The assembly includes a chip-cutting component for cutting a workpiece, the chip-cutting component comprising: A blade holder 3 is positioned and installed on the pencil sharpener, and the blade holder 3 is provided with a transmission component 30 that can control the blade holder 3 to perform unidirectional reverse transmission relative to the pencil sharpener housing; The tool holder 4 is mounted on the tool holder 3. The tool holder 3 and the tool holder 4 can be connected as a single unit or as separate units. In this embodiment, a separate unit connection is preferred. The tool holder 3 has a mounting groove 34, and the tool holder 4 is mounted on the tool holder 3 through the mounting groove 34. The bottom of the tool holder 3 has a mounting bracket 35, which has a certain accommodating space for accommodating the tool holder 4. This accommodating space is connected to the mounting groove 34. During installation, the tool holder 4 is pressed into the mounting groove 34. The top of the tool holder 4 has a cutting surface 40 near the horizontal plane of the pencil sharpener's cutting end, and an insertion hole 41 opened on the cutting surface 40. The object to be cut can be cut by inserting it into the insertion hole 41. The object to be cut can be a pencil, crayon, eyebrow pencil, wooden item, etc., or an object with a shape adapted to the cutting component. The shape of the object to be cut is not limited. It can be an object with a circular outer edge or a polygonal object. The pencil is either shaped or hexagonal. In this embodiment, the object to be cut is preferably pencil 7. When pencil 7 is inserted into the insertion hole 41 of the cutter holder 4 for cutting, a cutting surface 70 is generated on pencil 7, which varies along the axial displacement of pencil 7 according to the cutting insertion length. The cutting surface 70 is parallel to any radial surface of pencil 7. The cutting surface 70 is the actual contact surface of pencil 7 when it is being cut. Since there is no top cover structure on the top of the cutter holder 3, pencil 7 obtains the maximum effective cutting length when the cutting surface 70 and the cutting surface 40 are always on the same horizontal plane. The cutting surface 40 is actually the top surface of the blade 411. That is to say, the cutting surface 40 is the actual contact surface between the top surface of the blade 411 and pencil 7 when the cutter holder 4 (or the pencil sharpener with chip assembly) cuts pencil 7. Only when pencil 7 is inserted into the cutting surface 40 can it be effectively cut. Therefore, this application does not limit the setting position of the blade 411 in order to obtain the maximum effective cutting length.

[0029] When the blade holder 4 and the blade post 3 are installed in the pencil sharpener, the cutting surface 40 of the blade holder will also be close to the horizontal plane of the pencil sharpener used for cutting, so as to shorten the travel distance between the blade holder 4 and the cutting end of the pencil sharpener and increase the cutting efficiency. The cutting end of the pencil sharpener is the pencil inlet at the top of the pencil sharpener.

[0030] Please see Figure 2 , 3 As shown, the blade holder 3 is also provided with a limiting part that abuts against the inner wall of the pencil sharpener, and is positioned and installed on the pencil sharpener through the limiting part. Specifically, the limiting part includes a plurality of first limiting blocks 31 and / or second limiting blocks 32 that extend radially along the outer edge of the blade holder 3 and abut against the inner wall of the pencil sharpener. That is to say, in this embodiment, the first limiting block 31 and the second limiting block 32 are an extended protruding locking block, and are cut to extend and abut against the inner wall of the pencil sharpener, abutting and fixing or abutting and locking to prevent the blade holder 3 from falling out.

[0031] Please see Figure 1 , 2 As shown in Figure 3, to achieve unidirectional reverse stop motion, the transmission component 30 includes a positioning component 302 disposed between the pencil sharpener and the cutting assembly, and an elastic component 301 that engages with the positioning component 302 to enable the cutting assembly to perform unidirectional reverse stop motion relative to the pencil sharpener. The positioning component 302 and the elastic component 301 can be selectively disposed on the pencil sharpener or the cutting assembly according to actual production needs. Specifically, the positioning component 302 consists of multiple positioning structures that restrict the rotation of the elastic component 301, and the elastic component 301 consists of at least one elastic body that can rotate relative to the multiple positioning structures to produce elastic deformation. The deformable elastomer can deform elastically through its own material properties (such as pawls, ratchet arms, rubber rings, etc.), or it can deform elastically in conjunction with auxiliary components such as springs (such as pawls + compression springs / torsion springs, etc.). This allows at least one elastomer to continuously retract and reset between multiple positioning structures. The positioning structure's constraint and positioning effect on the elastomer enables the cutting assembly to achieve a one-way reverse motion effect. The one-way reverse motion between the positioning structure and the elastomer will utilize one of the following mechanisms, including but not limited to ratchet mechanisms, friction-type one-way mechanisms, one-way valves, and one-way bearing transmission structures. In this embodiment, the positioning element 302 and the elastic element 301 are preferably ratchet mechanisms. Therefore, the elastic body is a pawl, and the positioning structure is a ratchet with a toothed surface that can mesh with the pawl to rotate in one direction. In this embodiment, a pawl is preferably provided on the knife holder 3 or the pencil sharpener. The unidirectional transmission motion that prevents reversal is achieved through the meshing action between the pawl and multiple ratchet teeth.

[0032] Please see Figure 2 , 3 As shown, the tool holder 4 is provided with a cutting cavity 410 communicating with the insertion hole 41, and a cutting blade 411 fixedly installed on the tool holder 4 for cutting the object in the cutting cavity 410. The tool post 3 is provided with a mounting groove 34, and the tool holder 4 is installed on the tool post 3 through the mounting groove 34. The fixing method of the cutting blade 411 can be selected from, but is not limited to, screw fixing and snap fixing. In this embodiment, screws are used to fix the cutting blade 411 to the tool holder 4. In this embodiment, when the cutting blade 411 is installed, its top surface will be flush with the top surface of the tool holder 4 or the tool post 3, thereby obtaining a cutting surface 40 with the maximum effective cutting length. Figure 3 As shown, the pencil is inserted from the insertion hole 41 into the cutting cavity 410 and cut by the blade 411. The axial insertion distance of the cutting surface 40 at the top of the tool holder 4 relative to the pencil 7 determines the effective length of the pencil being cut. In this embodiment, the top surface of the blade 411 is flush with the top surface of the tool holder 4 or the tool post 3, so this component achieves the maximum cutting rate of the pencil.

[0033] Please see Figure 27 As shown, in order to improve the connection stability of the blade 411, this application not only sets the top surface of the blade 411 to be flush with the top surface of the tool holder 3 or the tool base 4, but also sets the top surface of the blade 411 close to the top surface of the tool holder 3 or the tool base 4, so as to set a fixing structure at the top of the blade 411. This fixing structure is used to assist the screws in fixing the blade 411 more stably, thereby improving the cutting stability requirements; or a certain distance difference is reserved so that the top surface of the blade 411 is slightly lower than the top surface of the tool base 4 or the tool holder 3, so as to facilitate the installation of the blade 411, reduce the cost of manual assembly, and improve production efficiency. However, using the above two blade 411 setting methods will result in a distance between the top surface of the blade 411 and the top surface of the tool holder 3, the tool base 4, or the top surface of the pencil sharpener that cannot be cut. Therefore, when using the above two methods, on the basis of stable connection of the blade 411, the top surface of the blade 411 should be set close to the top surface of the tool holder 3, the tool base 4, or the top surface of the pencil sharpener, so that it has a relatively maximum effective cutting length.

[0034] Please see Figures 1-7 As shown, the present invention also provides a pencil sharpener, including the aforementioned convenient cutting chip assembly, and further comprising: The housing 1 contains the aforementioned chip-cutting assembly. Inside the housing 1 is a chip collection chamber 12 for collecting the cut pencil shavings, and an opening at least one end serving as the cutting end of the pencil sharpener. This opening is used to install the chip-cutting assembly for cutting pencils. The inner wall of the top of the chip collection chamber 12 has a connecting portion 10 extending radially. This connecting portion 10 is formed by extending radially outward or inward within the inner wall of the chip collection chamber 12, creating a protrusion or groove structure with a locking and fixing function. This protrusion or groove structure is adapted to a limiting portion and is mainly used to position and install the chip-cutting assembly at the opening. Specifically, in this embodiment, the connecting portion 10 is arranged radially inward (from the outside towards the axis of the chip collection chamber 12), and forms a ring-shaped connecting portion 10, i.e., a ring-shaped protrusion structure, on the inner wall of the housing 1. The housing 1 positions and installs the chip-cutting assembly at the opening through the connecting portion 10, i.e., by the limiting portion in the chip-cutting assembly abutting and fixing or abutting and locking with the connecting portion 10.

[0035] It should be noted that the outer shell 1 can be designed as a single piece or a split type. In this embodiment, it is composed of two split outer shells 1 that are fixed to each other. The split outer shells 1 are fixed by any of the following methods, including but not limited to snap-fit ​​fixing, screw fixing, insertion fixing, ultrasonic heat fusion fixing, and pivot hole fixing. During installation, the chip assembly is installed in one outer shell 1 and then the other outer shell 1 is fixed by the corresponding pivot hole. Both outer shells 1 can serve as the shell for collecting chips, which significantly increases the volume of the chip collection bin 12.

[0036] Please see Figures 5-7 As shown, an annular bar 11 extends axially from the connecting part 10, thereby providing a clamping effect on the first limiting block 31 in the limiting part in the horizontal and vertical directions, so that the tool holder 3 can be stably and firmly installed on the outer shell 1. At the same time, a certain space is provided between the annular bar 11 and the inner wall of the outer shell 1. This space is used to set the transmission component 30 to control its one-way reverse stop movement. Therefore, the transmission component 30 in this embodiment is set in such that multiple ratchet teeth 302 are provided on the connecting part 10 between the annular bar 11 and the inner wall of the outer shell 1. The one-way reverse stop movement is achieved through the meshing action between the multiple ratchet teeth 302 and the single pawl 301 provided on the tool holder 3.

[0037] Please see Figure 5 , 6 As shown, in a preferred embodiment, a shaving cover 2 is detachably provided at the bottom of the outer casing 1. The inner wall of the shaving cover 2 is provided with at least one buckle 21. The bottom of the outer casing 1 is provided with an annular groove 14 that matches the buckle 21. The detachable shaving cover 2 allows the shavings in the shavings chamber 12 to be cleaned quickly for easy use next time.

[0038] Please see Figures 4-7 As shown in the preferred embodiment, the pencil sharpener of this embodiment adopts a topless design. In order to prevent the chipping assembly of the topless design from falling out, a first limiting block 31 and a second limiting block 32 are provided on the blade holder 3, which are axially vertically arranged. A movable groove 33 is provided between the first limiting block 31 and the second limiting block 32 to abut against the connecting part 10. Therefore, the first limiting block 31 and the second limiting block 32 are vertically spaced. During installation, the movable groove 33 is aligned with the connecting part 10 on the outer shell 1 for installation. After installation, the first limiting block 31 and the second limiting block 32, which are axially spaced vertically, abut against the connecting part 10 to form an axial limiting effect of the blade holder 3 relative to the outer shell 1 to prevent it from falling out. Due to the effect of the movable groove 33, the blade holder 3 can rotate horizontally relative to the outer shell 1, and the limiting part also provides axial anti-dislodgement protection.

[0039] When in use, the pencil is inserted directly into the insertion hole 41 for cutting. Since there is no conventional pressing and fixing component on the top of the cutting surface 40 of the blade holder 4, the pencil inlet (cutting surface 40) and the actual contact surface (cutting surface 70) of the pencil are consistent. Therefore, the distance (cutting length) of the pencil extending axially into the cutting surface 40 and entering the cutting cavity 410 can be cut by the blade 411. This results in a larger effective cutting length compared to conventional structures, reducing the ineffective cutting stroke by 1cm-2cm when using the pencil sharpener, increasing the pencil cutting rate, and ensuring that the pencil 7 can still achieve the optimal cutting utilization rate when it enters the final stage of use.

[0040] Example 2 For the sake of brevity, the parts that are the same as in Embodiment 1 will not be described again. Instead, the main focus will be on describing the structures that are different from those in Embodiment 1 of this invention.

[0041] Please see Figure 8 , 9 As shown in Figure 11, in the pencil sharpener provided in this embodiment, the top of the outer shell 1 is also provided with a decorative cover 5, and the bottom of the outer shell 1 is also provided with a chip collection cover 2. The transmission component 30 is set in the same way as in embodiment 1. The decorative cover 5 is provided with a cutting port 50. The cutting port 50 is the pencil inlet of the cutting end of the pencil sharpener when sharpening the pencil. It should be noted that the cutting port 50 is set on the decorative cover 5. Therefore, there is a distance between the cutting port 50 and the cutting surface 40 of the blade holder 4. When the pencil 7 is inserted into the cutting port 50 to cut, another ineffective surface 71 is generated on the pencil 7, which varies along the axial displacement of the pencil 7 according to the cutting insertion length. The distance between the cut surface 70 and the ineffective surface 71 is the ineffective cutting length, which is also an ineffective cutting stroke. In this stroke, although the pencil 7 rotates relative to the ratchet 302 or the pawl 301, it does not cut with the blade 411 in the insertion hole 41, forming an ineffective travel range of the pencil 7.

[0042] To reduce the ineffective cutting stroke (ineffective cutting length) during the cutting process, the cutting opening 50 is set in axial direction to fit the insertion hole 41 of the tool holder 4 (the cutting opening 50 is the pencil insertion point during cutting, which is the pencil inlet at the top of the pencil sharpener). This reduces the distance between the cutting opening 50 and the insertion hole 41 (reducing the distance between the ineffective surface 71 and the actual contact surface (cutting surface 40) of the pencil 7 being cut). For example, the ineffective cutting length ranges from 0 to 5 mm, and its length can be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm. Conventional pencil sharpeners usually require a 1-2 cm ineffective cutting length for the assembly of their internal ratchet mechanism. Therefore, this embodiment preferably controls the ineffective cutting length within 0-5 mm, which significantly improves the pencil cutting efficiency and reduces pencil waste. It should be noted that even if the range of ineffective cutting length in this application is expanded (such as 6 mm, 7 mm, etc.) without departing from the relevant technical features of this application, it should still fall within the protection scope of this application.

[0043] Since the cut surface 70 and the cutting surface 40 are always on the same horizontal plane, the effective cutting length of the pencil 7 can only be maximized when the distance between the ineffective surface 71 and the cut surface 70 (cutting surface 40) is shorter, thereby improving the cutting utilization rate of the pencil 7 and ultimately increasing the effective cutting length of the pencil sharpener with the top decorative cover 5. The decorative cover 5 is provided with a fitting 51, which can be selectively fitted and fixed to the tool holder 3 or the outer shell 1. It should be noted that the fitting and fixing in this application refers to the connection between two components through a fitting structure (such as a snap-fit ​​connection, threaded connection, spline connection, interference fit, etc.). This connection can constrain the two components and fix them in place, and also allow relative movement between the two components in a specific direction, such as relative rotation around an axis. Taking this embodiment as an example, the fitting 51 allows the decorative cover 5 to be in a state of being fixed relative to the outer shell 1, moving independently relative to the outer shell 1, or moving synchronously with the tool holder 3 relative to the outer shell 1. Specifically, in this embodiment, the decorative cover 5 can be in a state of synchronous movement with the outer shell 1 and the blade holder 3. Preferably, the blade holder 3 is provided with a buckle structure 51 that protrudes towards the decorative cover 5, and the decorative cover 5 is provided with a groove structure that engages with the buckle 51, thereby locking the decorative cover 5 and the blade holder 3. When using the pencil for cutting, the decorative cover 5 will rotate synchronously with the blade holder 3, increasing the fun and versatility of the pencil sharpener product.

[0044] Please see Figure 10As shown, in a preferred embodiment, the top of the decorative cover 5 is an arc-shaped surface with its edge inclined toward the central cutting opening 50. Since the central cutting opening 50 is axially aligned with the insertion hole 41, the design structure, which is higher around the perimeter than at the center, makes the cutting opening 50 more axially close to the insertion hole 41 of the knife holder 4. This shortens the ineffective cutting length between the cut surface 70 and the ineffective surface 71, further reducing the ineffective cutting stroke between the decorative cover 5 and the knife holder 4. In other words, it reduces the distance between the pencil insertion point (cutting opening 50) of the pencil sharpener and the actual contact point (insertion hole 41) where the pencil 7 is cut, increasing the pencil cutting efficiency, improving the cutting utilization rate of the pencil in the final stage of use, and increasing the effective usage length of a single pencil.

[0045] Example 3 For the sake of brevity, the parts that are the same as in Embodiment 2 will not be described again. Instead, the main focus will be on describing the structures that are different from those in Embodiment 2 of this invention.

[0046] Please see Figures 12-15 As shown, in another preferred embodiment, the pencil sharpener provided in this embodiment also has a decorative cover 5 and a chip collection cover 2, but the setting of the limiting part and the transmission component 30 is different. In this embodiment, the blade holder 3 is only provided with a first limiting block 31 for positioning and installation, and the connecting part 10 is not provided with an annular strip 11. It is fixed by the connecting part 10 extending radially inward and abutting against the first limiting block 31. The blade holder 3 abuts against the connecting part 10 through the first limiting block 31. Its assembly method with the outer shell 1 is the same as in embodiment 1. In order to prevent the blade holder 3 from axially dislodging, the transmission component in this embodiment... The configuration of 30 is also different, but the positioning element 302 and the elastic element 301 are preferably configured as a ratchet mechanism with a pawl and multiple ratchet teeth, and the configuration position of the pawl and ratchet teeth is not limited. In this embodiment, a pawl can be provided on the tool holder 3, and multiple ratchet teeth that mesh with the pawl can be provided on the decorative cover 5 or the outer shell 1; or, multiple ratchet teeth can be provided on the tool holder 3, and a pawl that meshes with the ratchet teeth can be provided on the decorative cover 5 or the outer shell 1. Specifically, in this embodiment, multiple ratchet teeth are provided on the tool holder 3, and a pawl that meshes with the multiple ratchet teeth is provided on the decorative cover 5. Furthermore, in order to enable the transmission component 30 to drive the tool holder 3 to perform a one-way reverse motion relative to the outer casing 1, such as... Figure 16 As shown, a latching component 51 is provided in the inner wall of the decorative cover 5, and a corresponding slot structure is provided in the outer wall of the outer shell 1 to engage with the latching component 51, so that the outer shell 1 and the decorative cover 5 are latched and locked, which not only protects the internal blade holder 3 from falling out, but also improves the entertainment and plasticity of the pencil sharpener product and enhances the interactive experience with the user.

[0047] Example 4 For the sake of brevity, the parts that are the same as in Embodiment 1 will not be described again. Instead, the main focus will be on the structure that is different from that in Embodiment 2 of the present invention.

[0048] Please see Figures 17-21 As shown, in another preferred embodiment, the pencil sharpener provided in this embodiment adopts an integrated shell 1 without a chip collection cover 2, but the transmission component 30 is arranged in the same way as in embodiment 1. Specifically, a set of connectors 13 is detachably provided on the top of the shell 1. The bottom of the connectors 13 is provided with a plurality of guide grooves 131. The guide grooves 131 are opened on the bottom side wall of the connectors 13 and have a downward-facing guide opening 1310. In this embodiment, two guide grooves 131 are preferably arranged symmetrically. Each guide groove 131 is provided with at least one positioning strip 132. Specifically, one positioning strip 132 is provided. A guide strip 121 that fits into the guide groove 131 is provided in the inner wall of the shell 1. A positioning groove 122 that fits into the positioning strip 132 is provided on the guide strip 121.

[0049] When installing the connector 13, align the guide strip 121 with the guide opening 1310 in the guide groove 131 and insert it vertically. After insertion, rotate the connector 13 so that the positioning strip 132 in the guide groove 131 engages with the positioning groove 122 on the guide strip 121 to ensure the connection stability between the connector 13 and the outer shell 1. Thus, the entire outer shell 1 can be used as a container for collecting pen shavings. Pen shavings can be cleaned with a simple rotation operation, which is both fun and convenient to operate.

[0050] Please see Figure 19 , 20 As shown, in this embodiment, the connecting part 10 is provided on the top inner wall of the assembly 13, and an annular strip 11 is also provided for setting the transmission part 30 and the abutment limiting part mounting tool holder 3. The limiting part is set in the same way as in embodiment 2, except that a first limiting block 31 is used.

[0051] In this embodiment, the decorative cover 5 is designed to rotate relative to the connecting member 13. Specifically, the mating member 51 is located on the bottom inner wall of the decorative cover 5. The mating member 51 is also a snap-fit ​​structure. The top of the connecting member 13 is also provided with an annular fixing groove 133 that snaps into the mating member 51 on the inner wall of the decorative cover 5. The decorative cover 5 rotates relative to the outer shell 1 through the mating member 51 and the annular fixing groove 133. As a feasible implementation, a guide groove with an inclined guide surface can also be provided on the top of the connecting member 13 to facilitate the guide snapping of the mating member 51 into the annular fixing groove 133. The decorative cover 5 in this embodiment is different from those in embodiments 1-3 and can rotate independently. In this embodiment, a toggle member 54 that facilitates rotation is also provided on the outer wall of the decorative cover 5, which greatly enhances the fun of the pencil sharpener. The internal chipping component can also perform unidirectional reverse movement with the outer shell 1, further improving the plasticity of the pencil sharpener and its interactivity with the user.

[0052] Example 5 For the sake of brevity, the parts that are the same as in Embodiment 1 will not be described again. Instead, the main focus will be on the structure that is different from that in Embodiment 2 of the present invention.

[0053] Please see Figure 22-25 As shown, in another preferred embodiment, the pencil sharpener provided in this embodiment has a decorative cover 5 and a chip collection cover 2 at the top and bottom of the outer shell 1. The decorative cover 5 is assembled in the same way as in embodiment 3. A mating part 51 is provided on the inner wall of the decorative cover 5 to fasten with the outer shell 1. The transmission part 30 is set in the same way as in embodiment 1. However, the limiting part only uses a first limiting block 31 to abut and fix with the connecting part 10 and the annular strip 11. The decorative cover 5 and the outer shell 1 adopt the same fastening and locking method as in embodiment 3.

[0054] Please see Figure 23 , 24As shown, the decorative cover 5 in this embodiment adopts an arc-shaped surface with its edge inclined towards the central cutting edge 50 to reduce the ineffective travel between the cutting edge 50 of the decorative cover 5 and the cutting surface 40 at the top of the tool holder 3, thereby increasing the pencil cutting efficiency. Simultaneously, a dustproof component 6 is rotatably provided on the decorative cover 5. The dustproof component 6 includes a rotating shaft 61, with a dustproof cover 62 at one end and a pivot hole 63 at the other end. A limiting platform 64 is provided at the bottom of the dustproof cover 62. The decorative cover 5 is provided with a limiting groove 52 and a pivot 53. The limiting groove 52 and the limiting platform 64 are adapted and engaged, and the pivot 53 and the pivot hole 63 are rotatably engaged. The dust cover 62 can be rotated around the pivot 53 to close. The limiting groove 52 is also coaxially opened at the center of the decorative cover 5 with the insertion hole 41 and has a groove structure. Therefore, the cutting edge 50 will be set on the bottom wall of the limiting groove 52. That is to say, the horizontal plane of the cutting end of the cutting edge 50 will be relatively lower, and the ineffective cutting distance between the cutting edge 50 and the cutting surface 40 of the tool holder 4 will also be reduced. The length of the pencil inserted into the cutting increases, reducing the waste of the pencil barrel and optimizing the final cutting utilization rate of the pencil. By setting a rotatable dust cover 62 on the decorative cover 5, dust can also be prevented from entering the cutting cavity 410 and affecting the cutting work.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A chip-cutting assembly that facilitates cutting, characterized in that, It includes a chip assembly for cutting a workpiece, the chip assembly comprising: A tool holder (3) is positioned and installed on the pencil sharpener. The tool holder (3) is provided with a transmission component (30) that can control the tool holder (3) to perform one-way reverse transmission relative to the pencil sharpener housing. A tool holder (4) is provided on the tool holder (3). The top of the tool holder (4) has a cutting surface (40) close to the horizontal plane of the cutting end of the pencil sharpener, and an insertion hole (41) opened on the cutting surface (40). When the workpiece is inserted into the tool holder (4) for cutting, a cutting surface (70) is generated on the workpiece, which varies along the axial displacement of the workpiece according to the cutting insertion length. The cutting surface (70) is parallel to any radial surface of the workpiece. When the cutting surface (70) and the cutting surface (40) are on the same horizontal plane, the workpiece obtains the maximum effective cutting length.

2. The convenient chip-cutting assembly according to claim 1, characterized in that: The blade holder (3) is also provided with a limiting part that just abuts against the inner wall of the pencil sharpener, and is positioned and installed on the pencil sharpener through the limiting part.

3. The convenient chip-cutting assembly according to claim 2, characterized in that: The limiting part includes a plurality of first limiting blocks (31) and / or second limiting blocks (32) extending radially along the outer edge of the blade holder (3) and abutting against the inner wall of the pencil sharpener.

4. The convenient chip-cutting assembly according to claim 1, characterized in that: The transmission component (30) includes a positioning component (302) disposed between the pencil sharpener and the chip assembly, and an elastic component (301) that is in transmission cooperation with the positioning component (302) and enables the chip assembly to perform a one-way reverse stop motion relative to the pencil sharpener.

5. The convenient chip-cutting assembly according to claim 4, characterized in that: The positioning element (302) is composed of multiple positioning structures that can restrict the rotation of the elastic element (301). The elastic element (301) is composed of at least one elastic body that can rotate relative to the multiple positioning structures to produce elastic deformation, thereby causing at least one elastic body to continuously retract and reset between the multiple positioning structures.

6. The convenient chip-cutting assembly according to claim 5, characterized in that: The elastic body is a pawl, and the positioning structure is a ratchet with a toothed surface that can mesh with the pawl and rotate in one direction.

7. The convenient chip-cutting assembly according to claim 1, characterized in that: The tool holder (4) is provided with a cutting cavity (410) communicating with the insertion hole (41), and a blade (411) fixedly installed on the tool holder (4) for cutting the object in the cutting cavity (410). The tool post (3) is provided with a mounting groove (34), and the tool holder (4) is installed on the tool post (3) through the mounting groove (34). The top surface of the blade (411) is set to fit against the top surface of the tool post (3) or the tool holder (4) to obtain a cutting surface (40) with the maximum effective cutting length.

8. A pencil sharpener, comprising a cutting-friendly chip assembly as described in any one of claims 1-7, further comprising: The inner shell (1) of the chip assembly is provided, which has a chip collection chamber (12) and an opening at least one end serving as the cutting end of the pencil sharpener; the inner wall of the top of the chip collection chamber (12) has a connecting part (10) extending radially for positioning and installing the chip assembly at the opening.

9. The pencil sharpener according to claim 8, characterized in that: The top of the outer shell (1) is also provided with a decorative cover (5), which is provided with a cutting edge (50) of the insertion hole (41) of the tool holder (4) in an axial fit, so as to reduce the distance between the cutting edge (50) and the insertion hole (41).

10. The pencil sharpener according to claim 9, characterized in that: The decorative cover (5) is provided with a fitting (51), and can be selectively fitted and fixed with the tool holder (3) or the outer shell (1) through the fitting (51), so that the decorative cover (5) can be in a state that is fixed relative to the outer shell (1), moves independently relative to the outer shell (1), or moves synchronously with the tool holder (3) relative to the outer shell (1).

11. The pencil sharpener according to claim 9, characterized in that: When the workpiece is inserted into the cutting edge (50) for cutting, another ineffective surface (71) is generated on the workpiece, which varies along the axial displacement of the workpiece according to the cutting insertion length. The ineffective cutting length is between the cutting surface (70) and the ineffective surface (71), and the range of the ineffective cutting length is 0-5mm.

12. The pencil sharpener according to claim 10, characterized in that: The decorative cover (5) has an arc-shaped surface at the top with its edge inclined toward the central cutting opening (50) so that the cutting opening (50) fits into the insertion hole (41) near the tool holder (4).

13. The pencil sharpener according to claim 10, characterized in that: The tool holder (3) is provided with a first limiting block (31) and a second limiting block (32), and there is a movable groove (33) between them that abuts and matches the connecting part (10).

14. The pencil sharpener according to claim 10, characterized in that: The tool holder (3) is provided with a first limiting block (31), and the tool holder (3) abuts against the connecting part (10) through the first limiting block (31).

15. The pencil sharpener according to claim 14, characterized in that: The decorative cover (5) is rotatably provided with a dustproof component (6), the dustproof component (6) includes a rotating shaft (61), one end of the rotating shaft (61) is provided with a dustproof cover (62), and the other end is provided with a pivot hole (63). The bottom of the dustproof cover (62) is provided with a limiting platform (64). The decorative cover (5) is provided with a limiting groove (52) that is adapted to the limiting platform (64) and a pivot (53) that is rotatably engaged with the pivot hole (63). The cutting edge (50) is provided on the bottom wall of the limiting groove (52).

16. The pencil sharpener according to claim 14, characterized in that: The tool holder (3) is provided with a pawl, and the decorative cover (5) or the outer shell (1) is provided with a plurality of ratchet teeth that mesh with the pawl; or, the tool holder (3) is provided with a plurality of ratchet teeth, and the decorative cover (5) or the outer shell (1) is provided with a pawl that meshes with the plurality of ratchet teeth.

17. The pencil sharpener according to claim 10, characterized in that: The top of the outer shell (1) is detachably provided with a set of connectors (13), and the bottom of the connectors (13) is provided with a plurality of guide grooves (131). At least one positioning strip (132) is provided in the guide groove (131). A guide strip (121) is provided in the inner wall of the outer shell (1) to fit into the guide groove (131). A positioning groove (122) is provided on the guide strip (121) to fit into the positioning strip (132).

18. A pencil sharpener according to claim 17, characterized in that: The connecting part (10) is located on the top inner wall of the assembly (13), the fitting part (51) is located on the bottom inner wall of the decorative cover (5), and the top of the assembly (13) is also provided with an annular fixing groove (133) that engages with the fitting part (51) on the inner wall of the decorative cover (5). The decorative cover (5) rotates relative to the outer shell (1) through the fitting part (51) and the annular fixing groove (133).

19. The pencil sharpener according to claim 9, characterized in that: An annular bar (11) extends axially from the connecting part (10), and multiple ratchet teeth are provided on the connecting part (10) between the annular bar (11) and the inner wall of the outer shell (1).

20. The pencil sharpener according to claim 9, characterized in that: The bottom of the outer shell (1) is detachably provided with a chip collection cover (2), the inner wall of the chip collection cover (2) is provided with at least one buckle (21), and the bottom of the outer shell (1) is provided with an annular groove (14) that is adapted to the buckle (21).

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