CN115972804A

CN115972804A - Pencil sharpener

Info

Publication number: CN115972804A
Application number: CN202211525026.9A
Authority: CN
Inventors: 陈刚
Original assignee: Deli Group Co Ltd
Current assignee: Deli Group Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-04-18

Abstract

The invention discloses a pencil sharpener, which comprises a pencil feeding box (1) and a casing (2), wherein a central positioning assembly and a trigger assembly are arranged on the casing of the pencil feeding box (1), the central positioning assembly comprises a first sliding block (3) and a second sliding block (4), a slide way (104) is arranged on the casing of the pencil feeding box (1), the first sliding block (3) and the second sliding block (4) are in sliding fit in the slide way (104), and a pencil feeding channel is formed between the first sliding block (3) and the second sliding block (4); a linkage piece is arranged between the first sliding block (3) and the second sliding block (4), one end of the first sliding block (3) is connected with a trigger component, and the trigger component is connected with a starting switch in the shell (2); the first sliding block (3) can drive the trigger assembly to open or close the starting switch. The pencil feeding mechanism of the pencil sharpener is simple and compact in structure, the sliding block of the central positioning device is directly connected with the triggering device, the structure is reliable, faults are not prone to occurring, and the service life is long.

Description

Pencil sharpener

Technical Field

The invention relates to the technical field of stationery, in particular to a pencil feeding mechanism and a pencil sharpener with the pencil feeding mechanism.

Background

The pencil sharpener is a pencil sharpening tool and is popular with students. The pencil sharpener comprises a pencil feeding mechanism and a pencil sharpening mechanism, wherein when the pencil is sharpened, a pencil penetrates through the pencil feeding mechanism and enters the pencil sharpening mechanism, the pencil is clamped through the pencil feeding mechanism after the pencil is fed in place, and then the pencil point of the pencil is sharpened by the pencil sharpening mechanism. After the pencil sharpening is finished, the pencil feeding mechanism can withdraw the pencil from the pencil sharpener. In order to enable the pencil to be in a central position when being inserted into the pencil feeding mechanism, the pencil feeding mechanism is provided with a central positioning device, but the central positioning device in the prior art still has defects.

The utility model patent of patent publication No. CN216832977U discloses a central positioner, including first slider, second slider and driving medium, first slider be equipped with first inclined hole, the second slider is equipped with the second inclined hole. The transmission part is provided with a first fitting piece and a second fitting piece, the first fitting piece extends into the first inclined hole, and the second fitting piece extends into the second inclined hole. During the use, the pencil inserts between first slider and the second slider, and the driving medium can drive first slider and second slider and remove the same distance to carry out central point to the pencil and fix a position. According to the center positioning device with the structure, the first sliding block and the second sliding block are connected through the transmission piece, and the transmission piece is connected with the triggering device, so that the pen feeding mechanism is complex and not compact in structure, and the product is large in size. The first sliding block and the second sliding block move, power is transmitted to the trigger device through the transmission part, the structure is unreliable, and if the first sliding block, the second sliding block and the transmission part are connected, the normal use of the pencil sharpener is affected.

Disclosure of Invention

The invention aims to solve the technical problem of providing a pencil sharpener, wherein a pencil feeding mechanism of the pencil sharpener is simple and compact in structure, a sliding block of a central positioning device is directly connected with a trigger device, the structure is reliable, faults are not easy to occur, and the service life is long.

The technical scheme of the invention is that the pencil sharpener with the following structure is provided, which comprises a pencil feeding box and a casing, wherein a central positioning component and a trigger component are arranged on the casing of the pencil feeding box, the central positioning component comprises a first sliding block and a second sliding block, a slide way is arranged on the casing of the pencil feeding box, the first sliding block and the second sliding block are in sliding fit in the slide way, and a pencil feeding channel is formed between the first sliding block and the second sliding block; a linkage part is arranged between the first sliding block and the second sliding block, one end of the first sliding block is connected with the trigger assembly, and the trigger assembly is connected with a starting switch in the machine shell; the first sliding block can drive the trigger assembly to open or close the starting switch.

After adopting the structure, compared with the prior art, the pencil sharpener of the invention has the following advantages:

because the first sliding block of the pencil sharpener is directly connected with the trigger component, the first sliding block can drive the trigger component to open or close the starting switch by sliding, the pencil sharpener has more reliable structure, is not easy to break down and has longer service life. Compared with the prior art, the center positioning assembly is compact in structure, occupies a small space and can reduce the overall size of the pencil sharpener.

As an improvement, a bracket is arranged at the other end of the first sliding block and is positioned above the first sliding block; the bracket is provided with a slide rail, and the second slide block is in sliding fit in the slide rail; the linkage piece is arranged between the bracket and the second sliding block, the linkage piece is respectively connected with the bracket and the second sliding block, and the linkage piece can enable the first sliding block and the second sliding block to slide oppositely or back to each other for the same distance. After adopting this kind of structure, second slider sliding fit is in the support of first slider, simple structure and compactness.

As an improvement, a return spring is arranged between the end face, far away from the support, of the first sliding block and the side wall of the shell of the pen feeding box, and the return spring provides thrust for the first sliding block to approach the second sliding block. After adopting this kind of structure, simple structure can make first slider and second slider reset.

As an improvement, the linkage piece is a rotating wheel, and a middle shaft of the rotating wheel penetrates through the second sliding block to be connected to the slide way in a rotating mode; a plurality of teeth are arranged at the edge of one side of the rotating wheel, a rack is arranged in one side of the bracket, and the teeth of the rotating wheel are meshed with the rack; the other side of the rotating wheel is provided with a deflector rod, the second sliding block is provided with a connecting position, and the deflector rod is in sliding fit with the connecting position. After adopting this kind of structure, drive through the rotation wheel between first slider and the second slider, transmission simple structure, transmission effect is good.

As an improvement, a bulge is arranged on the other side of the rotating wheel, and the upper end of the deflector rod is arranged on the lower surface of the bulge; the connecting position is a connecting groove arranged on the side edge of the second sliding block, and the lower end of the shifting lever is in sliding fit with the connecting groove. After adopting this kind of structure, simple structure, the preparation is convenient.

As an improvement, the second sliding block is provided with an avoiding hole, and a middle shaft of the rotating wheel penetrates through the avoiding hole to be rotatably connected to the bottom surface of the slideway. After adopting this kind of structure, compact structure.

As an improvement, connecting rods are arranged on two sides of one end, close to the first sliding block, of the bracket, and the end parts of the connecting rods are connected with two sides of the first sliding block; the lower side of the bracket is provided with a containing groove, the second sliding block is contained in the containing groove, two opposite side walls of the containing groove are respectively provided with a barrier strip, the barrier strips on the two sides form the sliding rail, and the two sides of the second sliding block are respectively in sliding fit with the barrier strips on the two sides; the second sliding block is flush with the first sliding block. After the structure is adopted, the second sliding block is in sliding fit in the accommodating groove, and the structure is reliable and the sliding is stable; the second sliding block is flush with the first sliding block, and the center positioning effect is good.

As an improvement, a first semicircular groove is formed in the end portion, close to the second sliding block, of the first sliding block, a second semicircular groove is formed in the end portion, close to the first sliding block, of the second sliding block, and when the first sliding block and the second sliding block are close to each other, the first semicircular groove and the second semicircular groove are spliced to form a pen inlet hole. After adopting this kind of structure, first semicircular groove and second semicircular groove can overlap outside the pencil, and is better to the center location effect of pencil.

As an improvement, a first arc-shaped baffle is arranged on one side, close to the first semicircular groove, of the lower surface of the first sliding block, a second arc-shaped baffle is arranged on one side, close to the second semicircular groove, of the lower surface of the second sliding block, and the first arc-shaped baffle and the second arc-shaped baffle are spliced to form an extending hole of the pen inlet hole. After adopting this kind of structure, first cowl and second cowl also can overlap outside the pencil, and it is better to pencil location effect.

As an improvement, one end of the first sliding block, which is far away from the bracket, is provided with a driving rod; the trigger assembly comprises a trigger rod, the end part of the driving rod is connected with the upper end of the trigger rod through a driving structure, and the lower end of the trigger rod is contacted with a key of the starting switch; the first sliding block slides back and forth to drive the trigger rod to move up and down, so that the starting switch can be turned on or off. After adopting this kind of structure, simple structure, the equipment is convenient.

As an improvement, the lower surface of the end part of the driving rod is provided with a driving inclined plane, the upper end of the trigger rod is provided with a jack, the end part of the driving rod is inserted into the jack, the side wall of the jack, which is positioned at the lower side of the end part of the driving rod, is provided with a matching inclined plane, and the driving inclined plane is attached to the matching inclined plane. After adopting this kind of structure, drive through the inclined plane between actuating lever and the trigger bar, simple structure, the equipment is convenient, and drive effect is good.

As an improvement, the trigger rod comprises an upper feeler lever and a lower feeler lever, the jack is arranged at the upper end of the upper feeler lever, the lower end of the upper feeler lever is provided with a chute, the upper end of the lower feeler lever is in sliding fit in the chute, and an elastic piece is arranged between the bottom of the chute and the upper end of the lower feeler lever; the lower end of the lower feeler lever is contacted with the key of the starting switch. After adopting this kind of structure, go up the feeler lever and be connected with first slider, first slip transmits power for last feeler lever after, and the rethread elastic component transmits for the second slider slides more steadily, and power transmission is softer between second slider and the starting switch, is difficult to damage starting switch, and the structure is more reliable.

As an improvement, the side wall of the sliding groove is provided with a limiting bulge, the side wall of the upper end of the lower feeler lever is provided with a limiting groove, and the limiting bulge is in sliding fit with the limiting groove. After the structure is adopted, the upper contact rod and the lower contact rod can be prevented from being separated under the action of the limiting groove and the limiting protrusion structure, and the structure is simple and reliable.

As an improvement, a guide hole is formed in the side wall of the shell of the pen feeding box, the trigger rod is in sliding fit in the guide hole, and the lower end of the lower feeler lever is exposed out of the lower end of the guide hole. After adopting this kind of structure, the guiding hole has the guide effect to the trigger bar activity, can restrict the movable track of trigger bar.

Drawings

Fig. 1 is a schematic perspective view of a pencil sharpener of the present invention.

Fig. 2 is an exploded view of the pencil sharpener of the present invention.

Fig. 3 is an exploded view of the pencil box of the pencil sharpener of the present invention.

Fig. 4 is a schematic perspective view of the center positioning assembly of the pencil sharpener of the present invention.

Fig. 5 is an exploded view of the centering assembly of the pencil sharpener of the present invention.

FIG. 6 is a schematic view of a partially exploded view of the center positioning assembly of the pencil sharpener of the present invention.

FIG. 7 is a perspective view of a trigger assembly of the pencil sharpener of the present invention.

Fig. 8 is an exploded view of the trigger assembly of the pencil sharpener of the present invention.

Shown in the figure: 1. the pen feeding box comprises a pen feeding box body 101, a box body 102, an upper cover 103, a top cover 104, a slide way 105, a baffle plate 2, a machine shell 3, a first slide block 301, a support 302, a connecting rod 303, a containing groove 304, a first semicircular groove 305, a first arc-shaped baffle 306, a rack 307, a guide hole 308, a driving rod 309, a positioning column 310, a driving inclined plane 311, a baffle strip 4, a second slide block 401, a second semicircular groove 402, a second arc-shaped baffle 403, a avoiding hole 404, a connecting groove 5, a rotating wheel 501, teeth 502, a bulge 503, a deflector rod 6, an upper contact rod 5, a sliding groove 601, a sliding groove 602, a limiting bulge 603, a jack 604, a matching inclined plane 7, a lower contact rod 701, a limiting groove 702, a limiting convex column 8, an elastic piece 9 and a return spring.

Detailed Description

In order that the present application may be better understood, various aspects of the present application will be described in greater detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification.

In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "including," and/or "containing," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

As shown in fig. 1 to 2, the application discloses a pencil sharpener comprises a pencil feeding box 1 and a casing 2, wherein the pencil feeding box 1 is arranged at the upper end of the casing 2, a pencil feeding mechanism is arranged in the pencil feeding box 1, a pencil sharpening mechanism is arranged in the casing 2, and the pencil feeding mechanism is connected with the pencil sharpening mechanism. When the pencil sharpener is used, the pencil is inserted into the pencil sharpening mechanism after passing through the pencil feeding mechanism, and the pencil sharpening mechanism is used for sharpening the end part of the pencil.

As shown in fig. 3 to 6, a central positioning assembly is arranged on the casing of the pen feeding box 1, and the central positioning assembly includes a first sliding block 3 and a second sliding block 4. The casing of the pen feeding box 1 comprises a box body 101, an upper cover 102 and a top cover 103, wherein the upper cover 102 covers the box body 101, an installation cavity is formed between the upper cover 102 and the box body 101, and the pen feeding mechanism is installed in the installation cavity. The upper surface of the upper cover 102 is provided with a slide way 104, and the first slide block 3 and the second slide block 4 are in sliding fit in the slide way 104. The top cover 103 covers the upper cover 102, and the top cover 103 covers the slideway 104.

The end part of the first sliding block 3, which is close to the second sliding block 4, is provided with a bracket 301, the two sides of one end of the bracket 301, which is close to the first sliding block 3, are provided with connecting rods 302, the end parts of the connecting rods 302 are connected with the two sides of the first sliding block 3, and the bracket 301 and the first sliding block 3 are integrally formed. The bracket 301 is located above the second slider 4, a containing groove 303 is arranged at the lower side of the bracket 301, and the second slider 4 is contained in the containing groove 303. The two opposite side walls of the accommodating groove 303 are respectively provided with a barrier strip 311, the barrier strips 311 on the two sides form a sliding rail, the two sides of the second slider 4 are respectively in sliding fit with the barrier strips 311 on the two sides, and the second slider 4 is in sliding fit with the sliding rail and the sliding rail 104.

The second sliding block 4 is flush with the first sliding block 3, a first semicircular groove 304 is formed in the end portion, close to the second sliding block 4, of the first sliding block 3, a second semicircular groove 401 is formed in the end portion, close to the first sliding block 3, of the second sliding block 4, and when the first sliding block 3 and the second sliding block 4 are close to each other, the first semicircular groove 304 and the second semicircular groove 401 are spliced to form a pen inlet hole. A first arc-shaped baffle 305 is arranged on one side, close to the first semicircular groove 304, of the lower surface of the first sliding block 3, a second arc-shaped baffle 402 is arranged on one side, close to the second semicircular groove 401, of the lower surface of the second sliding block 4, and the first arc-shaped baffle 305 and the second arc-shaped baffle 402 are spliced to form an extension hole of the pen inlet hole. The pen inlet hole and the extension hole form a pen inlet channel.

A linkage member is arranged between the first sliding block 3 and the second sliding block 4, in this embodiment, the linkage member is a rotating wheel 5, and the rotating wheel 5 is arranged in a space formed between the bracket 301 of the first sliding block 3 and the second sliding block 4. The second slider 4 on be equipped with dodge hole 403, the middle part of rotating wheel 5 pass dodge hole 403 rotate the connection and be in the bottom surface of slide 104 on. The rotating wheel 5 is respectively connected with the bracket 301 and the second sliding block 4, and the rotating wheel 5 rotates to enable the first sliding block 3 and the second sliding block 4 to slide oppositely or backwards for the same distance.

A plurality of teeth 501 are arranged at one side edge of the rotating wheel 5, a rack 306 is arranged in one side of the bracket 301, and the teeth 501 of the rotating wheel 5 are meshed with the rack 306. A protrusion 502 is arranged on the other side of the rotating wheel 5, the protrusion 502 is connected with a deflector rod 503, and the upper end of the deflector rod 503 is connected to the lower surface of the protrusion 502. The second slider 4 is provided with a connecting position, the connecting position is a connecting groove 404 arranged on the side edge of the second slider 4, and the lower end of the deflector rod 503 is in sliding fit in the connecting groove 404. By adopting the structure, the rotating wheel 5 can be driven to rotate no matter the first sliding block 3 slides or the second sliding block 4 slides, so that the first sliding block 3 and the second sliding block 4 slide oppositely or back to each other for the same distance.

As shown in fig. 7 to 8, a trigger assembly is arranged on the casing of the pen feeding box 1, the trigger assembly includes a trigger rod, and the trigger rod includes an upper contact rod 6 and a lower contact rod 7. The lower end of the upper feeler lever 6 is provided with a sliding groove 601, the upper end of the lower feeler lever 7 is in sliding fit in the sliding groove 601, the side wall of the sliding groove 601 is provided with a limiting projection 602502, the side wall of the upper end of the lower feeler lever 7 is provided with a limiting groove 701, and the limiting projection 602502 is in sliding fit in the limiting groove 701. An elastic part 8 is arranged between the bottom of the sliding groove 601 and the upper end of the lower feeler lever 7, the elastic part 8 is a spring, a limiting convex column 702 is arranged at the upper end of the lower feeler lever 7, the lower end of the spring is sleeved outside the limiting convex column 702, and the upper end of the spring is abutted against the bottom of the sliding groove 601.

The side wall of the box body 101 is provided with a guide hole 307, the trigger rod is in sliding fit in the guide hole 307, the upper end of the upper contact rod 6 is exposed out of the upper end of the guide hole 307, and the lower end of the lower contact rod 7 is exposed out of the lower end of the guide hole 307. One end of the first sliding block 3, which is far away from the bracket 301, is provided with a driving rod 308, the end part of the driving rod 308 is connected with the upper end of the upper contact rod 6 through a driving structure, and the lower end of the lower contact rod 7 is in contact with the button of the starting switch. The first sliding block 3 slides back and forth to drive the trigger rod to move up and down, so that the starting switch can be turned on or off.

A blocking piece 105 is arranged on one side, close to the driving rod 308, of the upper cover 102, and a return spring 9 is arranged between the end surface, close to the blocking piece 105, of the first sliding block 3 and the blocking piece 105 bracket 301. The end face, close to the blocking piece 105, of the first sliding block 3 is provided with a positioning column 309, one end of the return spring 9 is sleeved outside the positioning column 309, and the other end of the return spring 9 abuts against the blocking piece 105. When a pencil is inserted between the first sliding block 3 and the second sliding block 4, the first sliding block 3 moves towards the direction of the trigger rod; when the pencil is withdrawn, under the action of the return spring 9, the first sliding block 3 moves towards the direction close to the second sliding block 4.

The lower surface of the end of the driving rod 308 is provided with a driving inclined surface 310, the upper end of the upper feeler lever 6 is provided with a jack 603, the end of the driving rod 308 is inserted into the jack 603, the side wall of the jack 603, which is positioned at the lower side of the end of the driving rod 308, is provided with a matching inclined surface 604, and the driving inclined surface 310 is attached to the matching inclined surface 604. The drive ramp 310, socket 603 and mating ramp 604 form the drive structure. When the first sliding block 3 moves towards the direction of the insertion hole 603, the driving rod 308 can push the trigger rod to move downwards; when the first sliding block 3 moves away from the insertion hole 603, the driving rod 308 releases pressure to the trigger rod, and the trigger rod moves upwards under the action of the start switch button.

When the pencil of the pencil sharpener disclosed by the application is fed, a pencil passes through a first pencil inserting hole of the top cover 103 and is inserted between the first sliding block 3 and the second sliding block 4, and under the action of the extrusion of the pencil, the first sliding block 3 and the second sliding block 4 slide back to the same distance. In the sliding process of the first slider 3, the driving rod 308 of the first slider 3 pushes the push rod to move downwards, the lower end of the lower push rod of the push rod presses the starting switch, and then the starting switch is turned on to enable the pencil sharpener to perform pencil sharpening.

After the pencil is cut, the pencil is pulled out, and the first sliding block 3 and the second sliding block 4 do not have extrusion force. The first slide block 3 moves towards the second slide block 4 under the action of the return spring 9, and the first slide block 3 and the second slide block 4 slide oppositely for the same distance under the action of the linkage. The driving rod 308 cancels the pushing force on the trigger rod, the trigger rod is lifted upwards under the action of the start switch key, and the central positioning component and the trigger component return to the initial state.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.

Claims

1. A pencil sharpener comprises a pencil feeding box (1) and a casing (2), wherein a shell of the pencil feeding box (1) is provided with a center positioning assembly and a trigger assembly, the center positioning assembly comprises a first sliding block (3) and a second sliding block (4), a slide way (104) is arranged on the shell of the pencil feeding box (1), the first sliding block (3) and the second sliding block (4) are in sliding fit in the slide way (104), and a pencil feeding channel is formed between the first sliding block (3) and the second sliding block (4); the method is characterized in that: a linkage piece is arranged between the first sliding block (3) and the second sliding block (4), one end of the first sliding block (3) is connected with the trigger assembly, and the trigger assembly is connected with a starting switch in the machine shell (2); the first sliding block (3) can drive the trigger assembly to open or close the starting switch.

2. The pencil sharpener of claim 1, wherein: a bracket (301) is arranged at the other end of the first sliding block (3), and the bracket (301) is positioned above the first sliding block (3); the bracket (301) is provided with a slide rail, and the second slide block (4) is in sliding fit in the slide rail; the linkage piece is arranged between the support (301) and the second sliding block (4), the linkage piece is respectively connected with the support (301) and the second sliding block (4), and the linkage piece can enable the first sliding block (3) and the second sliding block (4) to slide oppositely or backwards for the same distance.

3. The pencil sharpener of claim 2, wherein: first slider (3) keep away from the terminal surface of support and the lateral wall of the casing of advancing a case (1) between be equipped with return spring (9), return spring (9) give first slider (3) the thrust that is close to second slider (4).

4. The pencil sharpener of claim 2, wherein: the linkage part is a rotating wheel (5), and the middle shaft of the rotating wheel (5) penetrates through the second sliding block (4) to be rotatably connected to the slide way (104); a plurality of teeth (501) are arranged at one side edge of the rotating wheel (5), a rack (306) is arranged in one side of the bracket (301), and the teeth (501) of the rotating wheel (5) are meshed with the rack (306); and a shifting lever (503) is arranged on the other side of the rotating wheel (5), a connecting position is arranged on the second sliding block (4), and the shifting lever (503) is in sliding fit with the connecting position.

5. The pencil sharpener of claim 4, wherein: a bulge (502) is arranged on the other side of the rotating wheel (5), and the upper end of the deflector rod (503) is arranged on the lower surface of the bulge (502); the connecting position is a connecting groove (404) arranged on the side edge of the second sliding block (4), and the lower end of the deflector rod (503) is in sliding fit in the connecting groove (404).

6. The pencil sharpener of claim 4, wherein: the second sliding block (4) is provided with an avoiding hole (403), and the middle shaft of the rotating wheel (5) penetrates through the avoiding hole (403) to be rotatably connected to the bottom surface of the slide way (104).

7. The pencil sharpener of claim 2, wherein: connecting rods (302) are arranged on two sides of one end, close to the first sliding block (3), of the support (301), and the end parts of the connecting rods (302) are connected with two sides of the first sliding block (3); an accommodating groove (303) is formed in the lower side of the support (301), the second sliding block (4) is accommodated in the accommodating groove (303), two opposite side walls of the accommodating groove (303) are respectively provided with a barrier strip (311), the barrier strips (311) on the two sides form the sliding rail, and the two sides of the second sliding block (4) are respectively in sliding fit with the barrier strips (311) on the two sides; the second sliding block (4) is flush with the first sliding block (3).

8. The pencil sharpener of claim 7, wherein: the pen feeding hole is characterized in that a first semicircular groove (304) is formed in the end portion, close to the second sliding block (4), of the first sliding block (3), a second semicircular groove (401) is formed in the end portion, close to the first sliding block (3), of the second sliding block (4), and when the first sliding block (3) and the second sliding block (4) are close, the first semicircular groove (304) and the second semicircular groove (401) are spliced to form the pen feeding hole.

9. The pencil sharpener of claim 8, wherein: one side of the lower surface of the first sliding block (3) close to the first semicircular groove (304) is provided with a first arc-shaped baffle (305), one side of the lower surface of the second sliding block (4) close to the second semicircular groove (401) is provided with a second arc-shaped baffle (402), and the first arc-shaped baffle (305) and the second arc-shaped baffle (402) are spliced to form the extension hole of the pen feeding hole.

10. The pencil sharpener of any one of claims 1 to 9, wherein: one end of the first sliding block (3) far away from the bracket (301) is provided with a driving rod (308); the trigger component comprises a trigger rod, the end part of the drive rod (308) is connected with the upper end of the trigger rod through a drive structure, and the lower end of the trigger rod is contacted with a key of the starting switch; the first sliding block (3) slides back and forth to drive the trigger rod to move up and down, so that the starting switch can be turned on or off.

11. The pencil sharpener of claim 10, wherein: the lower surface of the end part of the driving rod (308) is provided with a driving inclined plane (310), the upper end of the trigger rod is provided with a jack (603), the end part of the driving rod (308) is inserted into the jack (603), the side wall of the jack (603) positioned at the lower side of the end part of the driving rod (308) is provided with a matching inclined plane (604), and the driving inclined plane (310) is attached to the matching inclined plane (604).

12. The pencil sharpener of claim 11, wherein: the trigger rod comprises an upper feeler lever (6) and a lower feeler lever (7), the jack (603) is arranged at the upper end of the upper feeler lever (6), the lower end of the upper feeler lever (6) is provided with a sliding chute (601), the upper end of the lower feeler lever (7) is in sliding fit in the sliding chute (601), and an elastic part (8) is arranged between the bottom of the sliding chute (601) and the upper end of the lower feeler lever (7); the lower end of the lower feeler lever (7) is contacted with the key of the starting switch.

13. The pencil sharpener of claim 12, wherein: the side wall of the sliding groove (601) is provided with limiting protrusions (602) (502), the side wall of the upper end of the lower feeler lever (7) is provided with a limiting groove (701), and the limiting protrusions (602) (502) are in sliding fit in the limiting groove (701).

14. The pencil sharpener of claim 12, wherein: the lateral wall of the shell of the pen feeding box (1) is provided with a guide hole (307), the trigger rod is in sliding fit in the guide hole (307), and the lower end of the lower feeler lever (7) is exposed out of the lower end of the guide hole (307).