CN113580819B - Intelligent pencil sharpener with good dust removal effect - Google Patents
Intelligent pencil sharpener with good dust removal effect Download PDFInfo
- Publication number
- CN113580819B CN113580819B CN202110733363.6A CN202110733363A CN113580819B CN 113580819 B CN113580819 B CN 113580819B CN 202110733363 A CN202110733363 A CN 202110733363A CN 113580819 B CN113580819 B CN 113580819B
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- fixedly connected
- bevel gear
- main body
- body box
- dust
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L23/00—Sharpeners for pencils or leads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
- B08B15/026—Boxes for removal of dirt, e.g. for cleaning brakes, glove- boxes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/04—Cleaning by suction, with or without auxiliary action
- B08B5/043—Cleaning travelling work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L23/00—Sharpeners for pencils or leads
- B43L23/008—Sharpeners for pencils or leads with rotating cutting bodies
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- Filtering Of Dispersed Particles In Gases (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses an intelligent pencil sharpener with good dust removal effect, which comprises a main body box, a driving mechanism, a dust removal mechanism, a clamping mechanism, a shell, a base cover, driving cylinders and anti-slip pads, wherein the driving mechanism is arranged in the main body box, the dust removal mechanism is arranged on the main body box, the upper end of the main body box is connected with the shell through threads, the clamping mechanism is arranged in the shell, the lower end of the main body box is connected with the base cover through threads, the driving cylinders are fixedly connected in the main body box, the anti-slip pads are fixedly connected with the lower end of the base cover, the number of the anti-slip pads is four, and the four anti-slip pads are uniformly distributed on the base cover. The invention relates to an intelligent pencil sharpener with good dust removal effect, which has the characteristics of collecting dust generated during pencil sharpening and preventing dangers to students in the pencil feeding process.
Description
Technical Field
The invention belongs to the technical field of intelligent pencil sharpener, and particularly relates to an intelligent pencil sharpener with good dust removal effect.
Background
The pencil sharpener comprises an organic main body, a pencil clamping mechanism, a pencil sharpening mechanism and a pencil shaving box, wherein a groove capable of accommodating a pencil sharpener is formed in the bottom of the pencil shaving box, the pencil sharpener is inserted and positioned in the groove, and the pencil sharpener is an intelligent pencil sharpener which is sold and applied in the market at present and can automatically feed a pencil, so that the pencil can be sharpened automatically. However, the existing pencil sharpener has some problems: 1. when the pencil is automatically fed, the pencil needs to be driven to move, and dangers are easy to occur when the student operates the pencil; 2. larger dust can be generated when the pencil inner core is polished in the pencil sharpening process, and the dust is easily sucked into a human body in the garbage bin cleaning process, so that the health of students is influenced. Therefore, an intelligent pencil sharpener with good dust removal effect needs to be designed.
The invention comprises the following steps:
the invention aims to solve the problems and provide the intelligent pencil sharpener with good dust removal effect, which solves the problems in the background art.
In order to solve the problems, the invention provides a technical scheme of an intelligent pencil sharpener with good dust removal effect:
the utility model provides an effectual intelligence of dust removal cuts pen machine, includes main part case, actuating mechanism, dust removal mechanism, clamping mechanism, casing, base cover, actuating cylinder, slipmat, the inside of main part case is provided with actuating mechanism, be provided with dust removal mechanism on the main part case, the upper end of main part case has the casing through threaded connection, the inside of casing is provided with clamping mechanism, the lower extreme of main part case has the base cover through threaded connection, the inside fixedly connected with actuating cylinder of main part case, the lower extreme fixedly connected with slipmat of base cover, the quantity of slipmat is four, four slipmat is in evenly distributed on the base cover.
Preferably, the driving mechanism comprises a first bearing, a driving shaft, a square plate, a square sleeve, a pencil sharpening block, a second bearing, an internal thread cylinder, an external thread tube, a limiting plate, a limiting rod, a first bevel gear, a second bevel gear, a third bearing, a connecting shaft, a third bevel gear, a fourth bevel gear and a servo motor, wherein the first bearing is fixedly sleeved in the driving cylinder, the driving shaft is fixedly sleeved in the first bearing, one end of the driving shaft is fixedly connected with the square plate, the square sleeve is slidably connected with the outer side of the square plate, the pencil sharpening block is fixedly connected with the upper end of the square sleeve, the second bearing is fixedly sleeved in the main body box, the internal thread cylinder is connected with the external thread tube through threads, the limiting plate is fixedly connected with the upper end of the external thread tube, the second bevel gear is fixedly connected with the outer side of the driving shaft, the third bearing is fixedly connected with the inner side of the driving cylinder, the third bearing is fixedly connected with the inner side of the bevel gear, the third bearing is fixedly connected with the outer side of the bevel gear is fixedly connected with the output shaft through the fourth bevel gear, and the servo motor is fixedly connected with the outer side of the driving shaft.
Preferably, the first bevel gear is meshed with the third bevel gear, and the diameter of the first bevel gear is larger than that of the third bevel gear.
Preferably, the second bevel gear is meshed with the fourth bevel gear, and the diameter of the fourth bevel gear is larger than that of the second bevel gear.
Preferably, the limiting plate is in contact with the square sleeve, and the limiting plate is in sliding connection with the limiting rod.
Preferably, the number of the limiting rods is two, and the two limiting rods are symmetrically distributed on the main body box.
Preferably, the dust removing mechanism comprises a dust collecting box, a filter screen, a connecting pipe, a dust collecting pump and a sealing sleeve, wherein the dust collecting box is fixedly connected with the inside of the main body box, the filter screen is fixedly connected with two symmetrically distributed, the lower end of the dust collecting box is fixedly connected with the connecting pipe, the connecting pipe is fixedly connected with the main body box, the dust collecting pump is fixedly connected with the inside of the main body box, the sealing sleeve is fixedly sleeved with the inside of the lower end of the main body box, the sealing sleeve is fixedly connected with the output end of the dust collecting pump, the lower end of the main body box is fixedly connected with a filter cover, the output end of the dust collecting pump is positioned inside the filter cover, and an air outlet pipe of the dust collecting pump penetrates through the main body box.
Preferably, the clamping mechanism comprises a rubber block, clamping rods, springs and moving blocks, wherein the rubber block is in sliding connection with the inside of the shell, the clamping rods are in sliding connection with the inside of the shell, the springs are arranged on the outer sides of the clamping rods, the clamping rods are fixedly connected with the rubber block, one ends of the springs are fixedly connected with the shell, the other ends of the springs are fixedly connected with the rubber block, the moving blocks are fixedly connected with one ends of the clamping rods, and the moving blocks are in contact with the shell.
The beneficial effects of the invention are as follows: the invention relates to an intelligent pencil sharpener with good dust removal effect, which has the characteristics of collecting dust generated during pencil sharpening and preventing dangers to students in the pencil feeding process, and has the following two beneficial effects in specific use compared with the traditional intelligent pencil sharpener with good dust removal effect:
firstly, by additionally arranging structures such as an external thread pipe, an internal thread cylinder, a square sleeve and the like in the main body box, when the pencil sharpening block rotates to sharpen pencil, the pencil sharpening block can be driven to move through threaded fit between the external thread pipe and the internal thread cylinder, so that the danger to students caused by pencil movement in the pencil sharpening process can be avoided, and the pencil can be fixed by pushing the rubber block through the elasticity of the spring;
secondly, through adding structures such as dust absorption pump, water tank and dust absorption case on the main part case, at the in-process of cutting the pen, the dust that produces when polishing the pencil inner core can be through the inside of dust absorption case and dust absorption pump suction connecting pipe, then with the inside of dust particle discharge to the water tank to can avoid the dust to increase when using and influence student's health.
Description of the drawings:
for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.
FIG. 1 is a perspective view of the overall structure of the present invention;
FIG. 2 is a front cross-sectional view of FIG. 1 of the present invention;
FIG. 3 is a top view of the suction box of FIG. 2 according to the present invention;
FIG. 4 is an enlarged view of the portion A of FIG. 2 in accordance with the present invention;
FIG. 5 is an enlarged view of the portion B of FIG. 2 in accordance with the present invention;
fig. 6 is an enlarged view of the C-section structure of fig. 2 according to the present invention.
In the figure: 1. a main body box; 2. a driving mechanism; 3. a dust removing mechanism; 4. clamping mechanism; 5. a housing; 6. a base cover; 7. a drive cylinder; 8. an anti-slip pad; 21. a first bearing; 22. a drive shaft; 23. a square plate; 24. a square sleeve; 25. sharpening the pencil block; 26. a second bearing; 27. an internal thread cylinder; 28. an external threaded tube; 29. a limiting plate; 20. a limit rod; 201. bevel gears I; 202. bevel gears II; 203. a third bearing; 204. a connecting shaft; 205. bevel gears III; 206. bevel gears IV; 207. a servo motor; 31. a dust suction box; 32. a filter screen; 33. a connecting pipe; 35. a dust collection pump; 36. sealing sleeve; 37. a filter cover; 41. a rubber block; 42. clamping rods; 43. a spring; 44. and (5) moving the block.
The specific embodiment is as follows:
as shown in fig. 1-6, the present embodiment adopts the following technical scheme:
examples:
the utility model provides an intelligent pencil sharpener that dust removal effect is good, includes main part case 1, actuating mechanism 2, dust removal mechanism 3, clamping mechanism 4, casing 5, base cover 6, actuating cylinder 7, slipmat 8, the inside of main part case 1 is provided with actuating mechanism 2, be provided with dust removal mechanism 3 on the main part case 1, the upper end of main part case 1 has casing 5 through threaded connection, the inside of casing 5 is provided with clamping mechanism 4, the lower extreme of main part case 1 has base cover 6 through threaded connection, the inside fixedly connected with actuating cylinder 7 of main part case 1, the lower extreme fixedly connected with slipmat 8 of base cover 6, the quantity of slipmat 8 is four, four slipmat 8 is in evenly distributed on the base cover 6, and the slipmat 8 can make the device put more stably.
The driving mechanism 2 comprises a first bearing 21, a driving shaft 22, a square plate 23, a square sleeve 24, a pencil sharpening block 25, a second bearing 26, an internal thread cylinder 27, an external thread tube 28, a limiting plate 29, a limiting rod 20, a first bevel gear 201, a second bevel gear 202, a third bearing 203, a connecting shaft 204, a third bevel gear 205, a fourth bevel gear 206 and a servo motor 207, wherein the first bearing 21 is fixedly sleeved in the driving cylinder 7, the driving shaft 22 is fixedly sleeved in the first bearing 21, one end of the driving shaft 22 is fixedly connected with the square plate 23, the square sleeve 24 is slidably connected to the outer side of the square plate 23, the pencil sharpening block 25 is fixedly connected to the upper end of the square sleeve 24, the second bearing 26 is fixedly sleeved in the inner side of the main box 1, the internal thread cylinder 27 is fixedly sleeved with the external thread tube 28, the limiting plate 29 is fixedly connected to the upper end of the external thread tube 28, the limiting rod 20 is fixedly connected to the upper end of the main box 1, the first bevel gear 27 is fixedly connected with the inner side of the driving motor 202, the third bevel gear 204 is fixedly connected with the inner side of the bevel gear 27, and the inner side of the bevel gear 27 is fixedly connected with the outer side of the bevel gear 204 through the inner side of the three bevel gear 204, and the inner end of the three bevel gear 27 is fixedly connected with the inner side of the outer side of the bevel gear 204, and the inner end of the inner side of the three bevel gear 204 is fixedly connected with the inner side of the bevel gear 204, and the inner side of the inner threaded tube 204 is fixedly connected with the inner side of the bevel gear 204.
The first bevel gear 201 is meshed with the third bevel gear 205, the diameter of the first bevel gear 201 is larger than that of the third bevel gear 205, and the third bevel gear 205 can drive the first bevel gear 201 to rotate slowly.
The second bevel gear 202 is meshed with the fourth bevel gear 206, the diameter of the fourth bevel gear 206 is larger than that of the second bevel gear 202, and the fourth bevel gear 206 can drive the second bevel gear 202 to rotate rapidly.
The limiting plate 29 is in contact with the square sleeve 24, the limiting plate 29 is slidably connected with the limiting rod 20, and the limiting plate 29 can limit the externally threaded pipe 28.
The number of the limiting rods 20 is two, the two limiting rods 20 are symmetrically distributed on the main body box 1, and the two limiting rods 20 can enable the limiting plates 29 to be in stress balance.
The dust removing mechanism 3 comprises a dust collecting box 31, a filter screen 32, a connecting pipe 33, a dust sucking pump 35 and a sealing sleeve 36, wherein the dust collecting box 31 is fixedly connected to the inside of the main body box 1, the two symmetrically distributed filter screens 32 are fixedly connected to the inside of the dust collecting box 31, the connecting pipe 33 is fixedly connected to the lower end of the dust collecting box 31, the connecting pipe 33 is fixedly connected with the main body box 1, the dust sucking pump 35 is fixedly connected to the inside of the main body box 1, the sealing sleeve 36 is fixedly sleeved to the inside of the lower end of the main body box 1, the sealing sleeve 36 is fixedly connected with the output end of the dust sucking pump 35, the lower end of the main body box 1 is fixedly connected with a filter cover 37, the air outlet pipe of the dust sucking pump 35 passes through the inside of the filter cover 37, the connecting pipe 33 can transmit suction force, and the filter cover 37 can prevent sundries from being sucked by the dust sucking pump 35.
The clamping mechanism 4 comprises a rubber block 41, clamping rods 42, springs 43 and moving blocks 44, four evenly distributed rubber blocks 41 are connected with the inside of the shell 5 in a sliding mode, four evenly distributed clamping rods 42 are connected with the inside of the shell 5 in a sliding mode, springs 43 are arranged on the outer sides of the clamping rods 42, the clamping rods 42 are fixedly connected with the rubber blocks 41, one ends of the springs 43 are fixedly connected with the shell 5, the other ends of the springs 43 are fixedly connected with the rubber blocks 41, the moving blocks 44 are fixedly connected with one ends of the clamping rods 42, the moving blocks 44 are in contact with the shell 5, and the springs 43 can push the rubber blocks 41 to fix pencils through elasticity.
The use state of the invention is as follows: when in use, the moving block 44 is pulled, the moving block 44 drives the rubber block 41 to move through the clamping rod 42, the spring 43 is compressed, then a pencil is inserted into the inner side of the rubber block 41, then the moving block 44 is loosened, the spring 43 is reset, the spring 43 pushes the rubber block 41 to clamp the pencil through elasticity, then the servo motor 207 is started, the servo motor 207 drives the connecting shaft 204 to rotate, the connecting shaft 204 drives the bevel gear III 205 and the bevel gear IV 206 to rotate, the bevel gear IV 206 drives the driving shaft 22 to rotate through the bevel gear II 202, the driving shaft 22 drives the pencil sharpening block 25 to rotate through the square plate 23 and the square sleeve 24, the pencil sharpening block 25 can cut the pencil in the rotating process, the bevel gear III 205 drives the internal thread cylinder 27 to rotate through the bevel gear I201 in the rotating process of the pencil sharpening block 25, the internal thread section of thick bamboo 27 is in pivoted in-process through with the screw thread cooperation drive limiting plate 29 between the external screw thread pipe 28 go up and down, limiting plate 29 promotes square cover 24 at the in-process that goes up and down and upwards moves, square cover 24 drives the piece 25 of cutting in the in-process that removes and carries out feeding motion, thereby can avoid the in-process of cutting the pencil, and start dust absorption pump 35 at the in-process of cutting the pencil, dust absorption pump 35 is with the inside air suction of base cover 6, and discharge the outside to main part case 1 through the outlet duct, make the inside of base cover 6 form negative pressure, the suction that the negative pressure produced passes through connecting pipe 33 and transmits the inside of dust collection box 31, dust collection is concentrated to the inside of base cover 6 to the dust that produces when the dust collection box 31 will cut the pencil through filter screen 32, thereby can avoid the dust to splash to influence student's health.
While the basic principles and main features of the present invention and advantages of the present invention have been shown and described, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are described in the foregoing specification merely illustrate the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an effectual intelligence of dust removal cuts pen machine, includes main part case (1), actuating mechanism (2), dust removal mechanism (3), clamping mechanism (4), casing (5), base cover (6), actuating cylinder (7), slipmat (8), its characterized in that: the novel dust collector is characterized in that a driving mechanism (2) is arranged inside the main body box (1), a dust removing mechanism (3) is arranged on the main body box (1), a shell (5) is connected to the upper end of the main body box (1) through threads, a clamping mechanism (4) is arranged inside the shell (5), a base cover (6) is connected to the lower end of the main body box (1) through threads, a driving cylinder (7) is fixedly connected to the inside of the main body box (1), anti-slip pads (8) are fixedly connected to the lower end of the base cover (6), the number of the anti-slip pads (8) is four, and the four anti-slip pads (8) are uniformly distributed on the base cover (6);
the driving mechanism (2) comprises a first bearing (21), a driving shaft (22), a square plate (23), a square sleeve (24), a pencil sharpening block (25), a second bearing (26), an internal thread cylinder (27), an external thread tube (28), a limiting plate (29), a limiting rod (20), a first bevel gear (201), a second bevel gear (202), a third bearing (203), a connecting shaft (204), a third bevel gear (205), a fourth bevel gear (206) and a servo motor (207), the first bearing (21) is fixedly sleeved in the driving cylinder (7), the driving shaft (22) is fixedly sleeved in the first bearing (21), one end of the driving shaft (22) is fixedly connected with the square plate (23), the square sleeve (24) is slidably connected in the outer side of the square plate (23), the upper end of the square sleeve (24) is fixedly connected with the pencil sharpening block (25), the second bearing (26) is fixedly sleeved in the inner part of the main box (1), the second bearing (26) is fixedly sleeved with the internal thread cylinder (27), the inner thread cylinder (27) is internally connected with the external thread tube (28) through threads, the upper end of the external thread tube (28) is fixedly connected with the limiting rod (20), one end of the internal thread cylinder (27) is fixedly connected with a bevel gear I (201), the outer side of the driving shaft (22) is fixedly connected with a bevel gear II (202), a bearing III (203) is fixedly sleeved in the driving cylinder (7), a connecting shaft (204) is fixedly sleeved in the bearing III (203), a bevel gear III (205) is fixedly connected to the outer side of the connecting shaft (204), a bevel gear IV (206) is fixedly connected to one end of the connecting shaft (204), a servo motor (207) is fixedly connected to the outer side of the driving cylinder (7), and an output shaft of the servo motor (207) is connected with the connecting shaft (204) through bolts;
the dust removing mechanism (3) comprises a dust collecting box (31), a filter screen (32), a connecting pipe (33), a dust sucking pump (35), a sealing sleeve (36) and a filter cover (37), wherein the dust collecting box (31) is fixedly connected with the inside of the main body box (1), the filter screen (32) is fixedly connected with two symmetrically distributed inside the dust collecting box (31), the connecting pipe (33) is fixedly connected with the lower end of the dust collecting box (31), the connecting pipe (33) is fixedly connected with the main body box (1), the dust sucking pump (35) is fixedly connected with the inside of the lower end of the main body box (1), the sealing sleeve (36) is fixedly sleeved with the output end of the dust sucking pump (35), the filter cover (37) is fixedly connected with the lower end of the main body box (1), and the output end of the dust sucking pump (35) is located inside the filter cover (37), and the air outlet pipe of the dust sucking pump (35) penetrates through the main body box (1).
2. The intelligent pencil sharpener with good dust removal effect as in claim 1, wherein: the first bevel gear (201) is meshed with the third bevel gear (205), and the diameter of the first bevel gear (201) is larger than that of the third bevel gear (205).
3. The intelligent pencil sharpener with good dust removal effect as in claim 1, wherein: the bevel gear II (202) is meshed with the bevel gear IV (206), and the diameter of the bevel gear IV (206) is larger than that of the bevel gear II (202).
4. The intelligent pencil sharpener with good dust removal effect as in claim 1, wherein: the limiting plate (29) is in contact with the square sleeve (24), and the limiting plate (29) is in sliding connection with the limiting rod (20).
5. The intelligent pencil sharpener with good dust removal effect as in claim 1, wherein: the number of the limiting rods (20) is two, and the two limiting rods (20) are symmetrically distributed on the main body box (1).
6. The intelligent pencil sharpener with good dust removal effect as in claim 1, wherein: clamping mechanism (4) are including rubber piece (41), clamping pole (42), spring (43), movable block (44), the inside sliding connection of casing (5) has four evenly distributed's rubber piece (41), the inside sliding connection of casing (5) has four evenly distributed's clamping pole (42), every the outside of clamping pole (42) all is provided with spring (43), clamping pole (42) with rubber piece (41) fixed connection, one end of spring (43) with casing (5) fixed connection, the other end of spring (43) with rubber piece (41) fixed connection, one end fixedly connected with movable block (44) of clamping pole (42), movable block (44) with casing (5) contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110733363.6A CN113580819B (en) | 2021-06-30 | 2021-06-30 | Intelligent pencil sharpener with good dust removal effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110733363.6A CN113580819B (en) | 2021-06-30 | 2021-06-30 | Intelligent pencil sharpener with good dust removal effect |
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| Publication Number | Publication Date |
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| CN113580819A CN113580819A (en) | 2021-11-02 |
| CN113580819B true CN113580819B (en) | 2023-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110733363.6A Active CN113580819B (en) | 2021-06-30 | 2021-06-30 | Intelligent pencil sharpener with good dust removal effect |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114347702A (en) * | 2021-12-17 | 2022-04-15 | 德清县恒昌纺器涂料厂 | Ceramic pencil sharpener |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8225516B2 (en) * | 2004-05-25 | 2012-07-24 | Joe Green | Pencil sharpening device |
| JP2008105293A (en) * | 2006-10-26 | 2008-05-08 | Matsushita Electric Ind Co Ltd | Electric pencil sharpener |
| CN209176401U (en) * | 2018-11-13 | 2019-07-30 | 东莞市沃达办公设备有限公司 | A kind of electric pencil-sharpener with cleaning function |
| CN110171240B (en) * | 2019-06-29 | 2020-11-24 | 黑龙江工程学院 | Automatic pencil sharpener for card coating pen of English answer sheet |
| CN212124701U (en) * | 2020-05-18 | 2020-12-11 | 浙江胜明文具有限公司 | Novel pencil sharpening machine |
| CN212267096U (en) * | 2020-05-19 | 2021-01-01 | 宁波多达电子科技有限公司 | Electric pencil sharpener |
| CN111731016A (en) * | 2020-05-26 | 2020-10-02 | 江苏德皇文具有限公司 | Novel safety pencil sharpener |
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