Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Pencil sharpener capable of automatically discharging broken pencil lead

A technology for automatic rowing and sharpening of pencil sharpeners, applied in printing, office supplies, sharpening devices, etc., can solve the problems of blade wear, trouble, stuck between the blade and the knife holder, etc., and achieve the effect of avoiding manual removal of broken cores

Pending Publication Date: 2020-09-11
DELI GROUP CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When sharpening a pen and breaking the core, the broken core (2.1mm in diameter) will be stuck between the blade and the knife holder. At this time, it is necessary to manually remove the pen core, which is very troublesome, and the broken core will cause wear to the blade

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pencil sharpener capable of automatically discharging broken pencil lead
  • Pencil sharpener capable of automatically discharging broken pencil lead
  • Pencil sharpener capable of automatically discharging broken pencil lead

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 with Figure 8 As shown, a pencil sharpener for automatically arranging pencils and breaking cores includes a knife holder 1, a blade 2 and a fixing screw 3. The blade 2 is fixed on the knife holder 1 by the fixing screw 3, and a core slot 5 is provided on the knife holder 1 And conical sharpening hole 4. The sharpening hole 4 includes a first hole section 41 and a second hole section 42. The second hole section 42 communicates with the end of the first hole section 41, and the end of the first hole section 41 refers to the end away from the opening of the sharpening hole 4. The hole wall of the first hole section 41 includes a first arc wall 411 and a second arc wall 412, and the hole wall of the second hole section 42 includes a third arc wall 421, which is located in the extending direction of the first arc wall 411 Above, a groove 422 is provided on the hole wall of the second hole...

Embodiment 2

[0033] Such as Picture 9 As shown, the core slot 5 is in the extension direction of the second arc wall 412 and a curved surface is formed on the tool holder 1 at the same time, so that the second sharpening section 4b formed is transverse to the axis of the sharpening hole 4 The cross-sectional area gradually increases. The cross-sectional area of ​​the end of the core ejection groove 5 far away from the pencil hole 4 is larger than the cross-sectional area of ​​the end of the core ejection groove 5 near the pencil hole 4. The groove 422 is composed of a curved wall 4221 and a straight wall 4222. The groove wall of the core groove 5 forms a curved surface on the tool holder 1. This curved surface is a part of a conical surface and extends on the curved wall 4221 of the groove 422. On the same cone surface as the curved wall 4221 of the groove 422, the broken core falls into the groove 422 and then the cone surface is used to directly fall out of the pencil sharpener from the ...

Embodiment 3

[0035] Such as Picture 10 As shown, the groove bottom and both sides of the core groove 5 are flush with the three side inner walls of the groove 422, and one side groove wall of the core groove 5 is provided with an inner recess 51, which is in the third In the extending direction of the arc wall 521. The recess 51 is connected to the third arc wall 521 and extends in the extension direction thereof. The cross section of the recess 51 is arc-shaped, and the diameter of the circle corresponding to the arc is smaller than the diameter of the pencil lead to be sharpened, and is between 1.8 mm and 2.0 mm. In this example, the diameter of the circle corresponding to the arc is 1.93 mm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Lengthaaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a pencil sharpener capable of automatically discharging broken pencil lead. The pencil sharpener comprises a knife rest, a knife blade and a fixing screw. The knife blade is fixed to the knife rest through the fixing screw; a lead discharging groove and a conical pencil sharpening hole are formed in the knife rest; the pencil sharpening hole comprises a first hole section and a second hole section; the second hole section communicates with the tail end of the first hole section; the hole wall of the first hole section comprises a first arc wall and a second arc wall; the hole wall of the second hole section comprises a third arc wall; the third arc wall is located in an extending direction of the first arc wall; and a groove is formed in the hole wall of the secondhole section and located in an extending direction of the second arc wall. By means of the structure, compared with the prior art, the pencil sharpener has the benefits that after the pencil lead is broken in the pencil sharpener, the broken pencil lead cannot be stuck in the pencil sharpening hole, and the trouble of manually removing the broken lead is avoided.

Description

Technical field [0001] The invention relates to the technical field of stationery, in particular to a pencil sharpener. Background technique [0002] Sharpening pencils with a sharpener has been widely used because it is small and portable and suitable for elementary school students. In the process of sharpening the pencil, due to uneven force control during the process of sharpening, or excessive wear of the sharpener blade, the pencil core will be broken. The diameter of the refill of a regular pencil is 2.1mm; the minimum diameter of the inner end of the sharpening hole of the existing pencil sharpener is 1.9mm; the blade is lowered by 0.2mm in order to cut the pencil, so the blade and the sharpener sharpen the inner end of the hole The distance between the walls is 1.7 mm. When sharpening the pen core, the broken core (diameter 2.1mm) will be stuck between the blade and the knife holder. At this time, it is necessary to remove the pen core manually, which is very troublesom...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B43L23/00B43L23/08
CPCB43L23/00B43L23/08
Inventor 程扬方潘诚君
Owner DELI GROUP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com