Pencil sharpener and automatic pencil

Abstract

The utility model discloses a pencil sharpener, including the casing, the casing has the accommodating cavity, is provided with the cutting mechanism in the accommodating cavity, the cutting mechanism includes the base, sets up the cutter on the base, the base includes the cutting hole, the chip pocket of connecting cutting hole and accommodating cavity, the casing is provided with the aperture being connected with the cutting hole, the junction of cutting hole and aperture is provided with the blocking component of open -and -shut movement, and this blocking component is pushed open based on the insertion action of the cut object along the cutting hole, and utilizes the self elastic deformation ability and closes automatically. The utility model discloses still a kind of mechanical pencil, including the pencil sharpener described above. The utility model solves the problem that the debris generated when the existing pencil sharpener cuts is easy to drop outside along the cutting hole, and also solves the problem that the existing pencil sharpener is inconvenient to carry and is easy to lose.

Description

Technical Field

[0001] This utility model relates to the technical field of stationery, specifically to a pencil sharpener and a mechanical pencil. Background Technology

[0002] A pencil sharpener is a common stationery item used to sharpen the tips of pencils, crayons, and other writing implements for writing, drawing, and marking. A typical pencil sharpener usually consists of a cutting component and a base. The cutting component is fixed to the base, which has a cutting hole and a chip removal port. When sharpening is needed, the tip is inserted into the cutting hole and rotated relative to the base. The cutting component then cuts the tip, making it sharp, and the resulting chips are discharged through the chip removal port.

[0003] Conventional pencil sharpeners lack a shavings collection space, causing shavings to fall directly outwards, easily soiling desktops, floors, and other surrounding areas, requiring cleaning and making them inconvenient to use. To solve the shavings problem, some improved pencil sharpeners have incorporated a shavings collection space in the base structure to collect shavings generated during sharpening. However, shavings in the collection space may still fall outwards along the cutting hole, failing to completely solve the problem, especially since the sharpener is more prone to shaking when carried, causing shavings to fall out of the cutting hole. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a pencil sharpener that solves the problem that debris generated during cutting easily falls outward along the cutting hole.

[0005] This utility model discloses a pencil sharpener, comprising a housing with a cavity inside, and a cutting mechanism disposed within the cavity. The cutting mechanism includes a base and a cutting tool disposed on the base. The base includes a cutting hole and a chip discharge port connecting the cutting hole and the cavity. The housing has an opening connected to the cutting hole. When it is necessary to sharpen the tip, the tip of the object to be sharpened, such as a lead core, crayon, or pencil, is inserted into the cutting hole, and the tip is driven to rotate relative to the pencil sharpener. The cutting tool will cut the tip to make it sharp. The chips generated during cutting will enter the cavity inside the housing through the chip discharge port for collection. In addition, a blocking component that can be opened and closed is provided at the connection between the cutting hole and the opening. This blocking component is pushed open by the insertion action of the object to be sharpened along the cutting hole and closes automatically by its own elastic deformation capability. When the head of the object to be cut is inserted from the outside of the housing along the opening, it will push the blocking component to deform and open, allowing the head of the object to be cut to be inserted into the cutting hole for cutting operation. After the cutting is completed and the head of the object to be cut is pulled out from the cutting hole and the opening, the blocking component will reset and close under its own elasticity, which can prevent the debris from falling out along the cutting hole, making it convenient and hygienic to use.

[0006] Furthermore, the blocking component is a flexible diaphragm flap disposed between the cutting hole and the opening. The flexible diaphragm flap has good deformation and repositioning effects, and has a simple structure and low cost.

[0007] Furthermore, there are multiple flexible flaps, which are evenly distributed circumferentially along the center line of the cutting hole or opening. Each flexible flap includes a radially inwardly extending movable end and a radially outward connecting end. The movable ends of the multiple flexible flaps are fitted together to close the gap. When the head of the object being cut is inserted, the multiple flexible flaps can be pushed open simultaneously, which can reduce the resistance during insertion and removal, improve the blocking effect, and have better adaptability to the heads of objects of different sizes being cut.

[0008] Furthermore, multiple flexible diaphragm flaps are connected to a ring-shaped support block, which is fixedly installed within the cavity and located at the connection between the cutting hole and the opening. The inner hole of the support block is correspondingly connected between the cutting hole and the opening, and the connecting ends of the multiple flexible diaphragm flaps are integrally connected to the inner wall of the support block. Multiple flexible diaphragm flaps can be assembled onto the housing via the support block, resulting in a simple structure, convenient flap assembly, and prevention of flexible diaphragm flap detachment.

[0009] Furthermore, the housing includes a base and an openable cover plate connected to the upper end of the base. The cover plate can be connected to the base by sliding or rotating. The cavity of the housing is formed by the connection of the base and the cover plate. When the cavity is full of debris, the cover plate can be opened for emptying. The upper end of the base has a recessed cavity that forms the cavity. The recessed cavity is provided with a slot for the support block to be inserted downward for positioning. The inner side of the cover plate is provided with a protrusion that cooperates with the top of the support block for positioning, which improves the positioning effect of the support block, prevents it from shaking during use, and facilitates the disassembly and assembly of the support block.

[0010] Furthermore, multiple flexible diaphragm flaps are located at the end of the support block corresponding to the opening. The diameter of the support block is larger than the diameter of the opening. When the flexible diaphragm flaps are pushed to swing open in the direction of the cutting hole, the flexible diaphragm flaps will move towards the inner wall of the support block and will not be squeezed between the support block and the head of the object being cut. This can reduce the resistance when the object is inserted, removed and rotated, reduce the wear on the flexible diaphragm flaps and avoid excessive deformation, thus improving its service life.

[0011] Furthermore, the axial side of multiple flexible diaphragm flaps is flush with the end face of the support block, which facilitates the integral injection molding of multiple flexible diaphragm flaps and support blocks. In addition, it enables a limiting fit between the connecting end of the flexible diaphragm flap and the inner edge of the opening, thereby improving the closing effect of the flexible diaphragm flap.

[0012] Furthermore, both circumferential edges of the flexible membrane flap are chamfered, and the distance between the edges of two adjacent circumferential flexible membrane flaps gradually increases from the opening to the cutting hole. The chamfered design of the flexible membrane flap edges is more conducive to the integral injection molding of the gap between adjacent flexible membrane flaps, which can improve the structural strength of the injection mold, eliminate the processing step of cutting to form the gap, thereby simplifying the production process and reducing the precision requirements of the injection molding process. In addition, this structure can also prevent multiple flexible membrane flaps from being squeezed and deformed after closing, thus improving the closing effect of multiple flexible membrane flaps.

[0013] Furthermore, the flexible membrane flap and the support block are made of silicone or rubber, which have advantages such as strong elasticity, fatigue resistance, and low production cost.

[0014] This utility model also provides an automatic pencil, which solves the problems of existing pencil sharpeners being inconvenient to carry and easy to lose.

[0015] This invention relates to a mechanical pencil, comprising a pencil barrel, a connecting rod movably disposed at the rear end of the pencil barrel for controlling the extension of the lead from the front end of the pencil barrel, and a pencil sharpener. A connecting cylinder is integrally connected to the shell of the pencil sharpener. The connecting cylinder and the connecting rod form a detachable plug-in positioning fit. This mechanical pencil uses a thick lead, which needs to be sharpened before drawing or writing. When sharpening is required, the lead is driven to extend slightly forward, and the pencil sharpener is detached from the rear end of the pencil barrel for sharpening. After sharpening, it is reattached to the rear end of the pencil barrel. In daily use, the pencil sharpener at the rear end can be used as a button to control lead extension or as a decorative item. This structure, connecting the pencil sharpener to the rear end of the pencil barrel, enhances the aesthetics and fun of the mechanical pencil while preventing the sharpener from falling or being lost. Attached Figure Description

[0016] Figure 1 This is a structural diagram of an embodiment of the pencil sharpener of this utility model; Figure 2 This is an exploded view of the structure of an embodiment of the pencil sharpener of this utility model; Figure 3 This is a cross-sectional view of an embodiment of the pencil sharpener of this utility model; Figure 4 This is a schematic diagram of the internal structure of the casing of an embodiment of the pencil sharpener of this utility model; Figure 5 This is a schematic diagram of the support block and flexible membrane flap in an embodiment of the pencil sharpener of this utility model. Figure 1 ; Figure 6 This is a schematic diagram of the support block and flexible membrane flap in an embodiment of the pencil sharpener of this utility model. Figure 2 ; Figure 7 This is a partial cross-sectional view of the junction of two adjacent flexible membrane flaps in the circumferential direction in an embodiment of the pencil sharpener of this utility model; Figure 8 This is a structural diagram of an embodiment of the mechanical pencil of this utility model; Figure 9 This is a cross-sectional view of an embodiment of the mechanical pencil of this utility model. Detailed Implementation

[0017] Examples of embodiments of this utility model pencil sharpener, such as... Figures 1 to 7 As shown, the device includes a housing 1, which contains a cavity 10. A cutting mechanism 2 is disposed in the cavity 10. The cutting mechanism 2 includes a base 21 and a cutting tool 22 disposed on the base 21. The base 21 includes a cutting hole 211 and a chip discharge port 212 connecting the cutting hole 211 and the cavity 10. The housing 1 has an opening 11 connected to the cutting hole 211. When it is necessary to sharpen the tip, the tip of the object to be sharpened, such as a lead core, crayon, or pencil, is inserted into the cutting hole 211 and the tip is driven to rotate relative to the pencil sharpener. The cutting tool 22 will cut the tip to make it sharp. The chips generated during cutting will enter the cavity 10 inside the housing 1 through the chip discharge port 212 for collection. In addition, a blocking component that can be opened and closed is provided at the connection between the cutting hole 211 and the opening 11. The blocking component is pushed open by the insertion of the object to be sharpened along the cutting hole 211 and closes itself by its own elastic deformation. When the head of the object to be cut is inserted from the outside of the housing 1 along the opening 11, it will push the blocking component to deform and open, so that the head of the object to be cut can be inserted into the cutting hole 211 for cutting operation. After the cutting is completed and the head of the object to be cut is pulled out from the cutting hole 211 and the opening 11, the blocking component will reset and close under its own elasticity, which can prevent the debris from falling out along the cutting hole 211. It is convenient and hygienic to use.

[0018] In this embodiment, the blocking component consists of multiple flexible flaps 31 disposed between the cutting hole 211 and the opening 11. The flexible flaps 31 have good deformation and reset effects, and have a simple structure and low cost. The multiple flexible flaps 31 are evenly distributed circumferentially along the center line of the cutting hole 211 or the opening 11. Each flexible flap 31 includes a radially inwardly extending movable end and a radially outward connecting end. The movable ends of the multiple flexible flaps 31 are fitted together to close. When the head of the object being cut is inserted, the multiple flexible flaps 31 can be pushed open simultaneously, which can reduce the resistance during insertion and removal, improve the blocking effect, and has better adaptability to the heads of objects of different sizes being cut.

[0019] In this embodiment, as Figure 5 , Figure 6As shown, there are four flexible membrane flaps 31, and a cross-shaped slot 30 is formed between the four flexible membrane flaps 31. In other embodiments, three or more flexible membrane flaps 31 may also be used.

[0020] Multiple flexible diaphragm flaps 31 are connected to an annular support block 32. The support block 32 is fixedly installed in the cavity 10 and located at the connection between the cutting hole 211 and the opening 11. The inner hole of the support block 32 is connected between the cutting hole 211 and the opening. The connecting ends of the multiple flexible diaphragm flaps 31 are integrally connected to the inner wall of the support block 32. The multiple flexible diaphragm flaps 31 can be assembled on the housing 1 through the support block 32 and held between the opening 11 and the cutting hole 211 by the support block 32. The structure is simple, the assembly of the diaphragm flaps is convenient, and the flexible diaphragm flaps 31 can be prevented from falling off.

[0021] The housing 1 includes a base 11 and a cover plate 12 that can be opened and closed and connected to the upper end of the base 11. In this embodiment, the cover plate 12 is connected to the base 11 by rotation. After the cover plate 12 is closed relative to the base 11, it can be positioned by magnetic attraction or snap-fit. In other embodiments, a sliding cover plate can also be used.

[0022] The cavity 10 of the housing 1 is formed by connecting a base 11 and a cover plate 12. When the cavity 10 is full of debris, the cover plate 12 can be opened for emptying. A recess 111 forming the cavity 10 is provided at the upper end of the base 11. A slot 112 is provided in the recess 111 for the support block 32 to be inserted downwards for positioning. A protrusion 121 is provided on the inner side of the cover plate 12 to cooperate with the top of the support block 32 for positioning, improving the positioning effect of the support block 32, preventing it from shaking during use, and facilitating the assembly and disassembly of the support block 32. To prevent the support block 32 from rotating, the support block 32 preferably adopts the following design: Figure 5 The rectangular shape, the slot 112 or the protrusion 121 has a flat end face that makes smooth contact with the outer side of the support block 32, which can limit the support block 32 in the lateral or circumferential direction and prevent it from rotating.

[0023] Multiple flexible diaphragm flaps 31 are located at one end of the support block 32 corresponding to the opening 11. The diameter of the support block 32 is larger than the diameter of the opening 11, such that the diameter of the support block 32 after the thickness of the flexible diaphragm flaps 31 is superimposed on the inner side of the inner wall of the support block 32 is equal to the diameter of the opening 11. This allows the flexible diaphragm flaps 31 to move towards the inner wall of the support block 32 when they are pushed to swing open in the direction of the cutting hole 211, preventing them from being squeezed between the support block 32 and the head of the object being cut. This reduces the resistance when the object is inserted, removed, or rotated, reduces wear on the flexible diaphragm flaps 31, avoids excessive deformation, and improves their service life.

[0024] like Figure 3 ,Figures 5 to 6 As shown, one axial side of the multiple flexible diaphragm flaps 31 is flush with the end face of the support block 32, which facilitates the integral injection molding of the multiple flexible diaphragm flaps 31 and the support block 32. In addition, it enables a limiting fit between the connecting end of the flexible diaphragm flap 31 and the inner edge of the inner end of the opening 11, improving the closing effect of the flexible diaphragm flap 31. Figure 3 It can be seen that there is an axial abutment fit between the radial outer end of the flexible membrane flap 31, i.e. the connecting end, and the inner edge of the inner end of the opening 11.

[0025] like Figures 6 to 7 As shown, both sides of the flexible diaphragm flap 31 are chamfered. The distance between the edges of two adjacent flexible diaphragm flaps 31 gradually increases from the opening 11 to the cutting hole 211. The chamfered design of the edges of the flexible diaphragm flap 31 is more conducive to the integral injection molding of the gap between adjacent flexible diaphragm flaps 31, which can improve the structural strength of the injection mold and eliminate the processing step of cutting to form the gap, thereby simplifying the production process and reducing the precision requirements of the injection molding process. In addition, this structure can also prevent multiple flexible diaphragm flaps 31 from being squeezed and deformed after closing, thus improving the closing effect of multiple flexible diaphragm flaps 31.

[0026] When multiple flexible membrane flaps 31 are in a closed state, the edges of circumferentially adjacent flexible membrane flaps 31 can make appropriate contact or present a small gap, both of which can prevent debris from falling out.

[0027] The flexible membrane flap 31 and the support block 32 are preferably made of silicone or rubber, which have the advantages of strong elasticity, fatigue resistance and low production cost.

[0028] The mechanical pencil of this utility model embodiment, such as Figures 8 to 9 As shown, it includes a pen barrel 4, a connecting rod 6 movably disposed at the rear end of the pen barrel 4 for controlling the lead 5 to extend from the front end of the pen barrel 4, and also includes the aforementioned pencil sharpener. A connecting cylinder 113 is integrally connected to the base 11 of the pencil sharpener's housing 1. Figures 1 to 3 (This illustrates the structural features). The connecting cylinder 113 and the connecting rod 6 form a detachable plug-in positioning fit. The mechanical pencil of this invention uses a thick lead. Before drawing and writing, the lead needs to be sharpened. When sharpening is needed, the lead 5 is driven to extend forward slightly, and the pencil sharpener is removed from the rear end of the pencil barrel 4 to sharpen the lead 5. After the operation is completed, it is reinstalled at the rear end of the pencil barrel 4. In daily use of the mechanical pencil, the pencil sharpener at the rear end can be used as an operation button to control the lead output, or it can be used as a decoration. By connecting the pencil sharpener to the rear end of the pencil barrel in this structure, the aesthetics and fun of the mechanical pencil can be improved, and the pencil sharpener can be prevented from falling or being lost.

[0029] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.

Claims

1. A pencil sharpener, comprising a housing, a cavity within the housing, a cutting mechanism disposed within the cavity, the cutting mechanism comprising a base and a cutting tool disposed on the base, the base comprising a cutting hole and a chip discharge port connecting the cutting hole and the cavity, the housing having an opening connected to the cutting hole, characterized in that: A blocking component that can be opened and closed is provided at the connection between the cutting hole and the opening. The blocking component is pushed open based on the insertion action of the object being cut along the cutting hole, and closes itself by utilizing its own elastic deformation capability.

2. The pencil sharpener according to claim 1, characterized in that: The blocking component is a flexible membrane flap disposed between the cutting hole and the opening.

3. The pencil sharpener according to claim 2, characterized in that: The flexible membrane flaps are multiple in number and are evenly distributed circumferentially along the center line of the cutting hole or opening. Each flexible membrane flap includes a radially inwardly extending movable end and a radially outward connecting end, and the movable ends of the multiple flexible membrane flaps are fitted together to close the gap.

4. The pencil sharpener according to claim 3, characterized in that: Multiple flexible membrane flaps are connected to a ring-shaped support block, which is fixedly installed in the cavity and located at the connection between the cutting hole and the opening. The inner hole of the support block is connected between the cutting hole and the opening, and the connecting ends of the multiple flexible membrane flaps are integrally connected to the inner wall of the support block.

5. The pencil sharpener according to claim 4, characterized in that: The housing includes a base and an openable cover plate connected to the upper end of the base. The cavity of the housing is formed by the connection of the base and the cover plate. The upper end of the base has a recess that forms the cavity. The recess has a slot for a support block to be inserted downward for positioning. The inner side of the cover plate has a protrusion that cooperates with the top of the support block for positioning.

6. The pencil sharpener according to claim 4, characterized in that: Multiple flexible membrane flaps are located at one end of the support block corresponding to the opening, and the diameter of the opening in the support block is larger than the diameter of the opening.

7. The pencil sharpener according to claim 6, characterized in that: The axial side of multiple flexible membrane flaps is flush with the end face of the support block.

8. The pencil sharpener according to claim 3, characterized in that: Both sides of the flexible membrane flap are chamfered, and the distance between the edges of two adjacent flexible membrane flaps gradually increases from the opening to the cutting hole.

9. The pencil sharpener according to claim 4, characterized in that: The flexible membrane flap and support block are made of silicone or rubber.

10. A mechanical pencil, comprising a barrel and a connecting rod movably disposed at the rear end of the barrel for controlling the extension of the lead from the front end of the barrel, characterized in that: It also includes a pencil sharpener as described in any one of claims 1-9, wherein a connecting cylinder is integrally connected to the housing of the pencil sharpener, and the connecting cylinder and the connecting rod form a detachable plug-in positioning fit.

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