CN2166979Y

CN2166979Y - Pencil sharpener

Info

Publication number: CN2166979Y
Application number: CN 93239077
Authority: CN
Inventors: 陈武贵
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-08-03
Filing date: 1993-08-03
Publication date: 1994-06-01
Anticipated expiration: 2003-08-03

Abstract

The utility model discloses a pencil sharpener which is suitable for various hardness pencil cores whose sections of pencil bodies are circles or hexagons. The thickness of a sharpening pencil core can be adjusted and is a cylinder shape. The pencil core can not be broken or excessively sharpened due to a person or unbalanced force. The utility model comprises the knife frame of a guide hole, which has the functions of spacing an axial end, guiding an axial direction and fixing, a pencil joint rod, a blade which is provided with a notch and a slotted hole, a screw, a handwheel and a screw rod. One end of the blade is bent. The pencil joint rod can be used for jointing a pencil whose section is a hexagon or a round. The supplementary angle of the bent angle of the blade is equal to the half of the included angle of the generatrix of the conical hole of the knife frame. A cutting edge in the plane of the blade and the axial line of the conical hole of the knife frame form the included angle of 0 DEG to 8 DEG.

Description

Pencil sharpener

The utility model relates to a kind of improved high efficiency Pencil sharpener.

Present pencil sharpener mainly is made up of a blade and a screw that has the moulding knife rest of garden taper hole and be fixed on the knife rest.The pen that is dug is a positive cone, owing to difference in operation or the different pen cores of cutting that exist in various degree of structure more; Loss is big, and efficient is low, and the pencil utilization rate is low, can not be extensive use of.Though interrelated data has been done improvement, but still exist easily broken core, pen core that tapering is arranged, use and operate the narrow deficiency of practical application face that varies with each individual.

The purpose of this utility model is the problem at above-mentioned existence, proposes the practical wide the pen or shape tool of cutting of a kind of efficient, reliable, low-loss, handiness.

Fig. 1 is the vertical view of pencil sharpener.

Fig. 2 is the cutaway view of Fig. 1 along the A-A line.

Among the figure: (1)---knife rest; (2)---blade; (3)---screw; (4)---handwheel; (5)---screw rod; (6)---Pencil joint holder.

Knife rest (1) is that to have a cone angle be 21 ° positive garden taper hole, and continuously at its two ends opens the garden cylindrical hole that diameter does not wait, and three holes are coaxial. The firm effect of guiding is played in big post hole, end garden, and the small hole shaft transverse plane plays position-limiting action, and axiality and volitional check pen core when inserting rotation with the assurance pencil are cut out length. The top in hole have one with the rectangle shrinkage pool of the bus tangent plane of garden taper hole, this shrinkage pool should be cut into the bus certain thickness. Blade (2) is by screw (3) Be fixed in its shrinkage pool. Blade becomes the angle of 0 "～8 " with axially bored line in top view. The rear of knife rest is provided with bearing with threaded hole, with studdle (5) and handwheel (4), handwheel (4) partly puts in the breach of blade (2), it is just vertically mobile to rotate its blade of handwheel (4) (2), make the straight sword of blade (2) and Qu Ren reduce or increase at radial dimension, to adapt to the requirement of cutting thickness pen core. Knife rest the place ahead has the hole, garden that can insert Pencil joint holder (6), and the two ends of Pencil joint holder (6) are respectively equipped with hole, garden, hex hole, needs the pencil of spreading just to insert in this hole. One end bending certain-length of blade (2), bending part has bending radius, and namely blade is made up of three sections of straight sword, Qu Ren, straight swords, when blade (2) flattens, whole blade is a straight line sword, so the rake face of blade (2), rear knife face, horizontal frontal plane are the plane. The degree of its bending is to make the straight sword of bending part be parallel to knife rest (1) bore axis, and then the supplementary angle at bending angle equals half of knife rest taper hole bus angle. The middle part of blade (2) has the oval hole of fixing usefulness; Have the breach that adapts to handwheel (4) at the postmedian edge.

During operation, after pen core puts in place, will transfer fair cutting to by cutting, and be rotated further 1～3 circle this moment, like this, the whole surface that is cut will be bright and clean attractive in appearance.

This pencil sharpener is applicable to that the handwriting cross section is the pencil of garden shape or hexagon, various hardness pen cores, not only thickness is adjustable for institute's pen core of cutting, and in the certain-length scope, be bright and clean Cylinder shape, like this, make pencil convenient and practical in write, paint, drawing etc. used.Pencil joint holder can make pencil use the shortest limit, can or not rotate because of the people firmly uneven pen core to be fractureed, and does not more understand to cut pen core more and cause a large amount of wastes.Therefore, it is a kind ofly to cut an efficient height, cut the advanced tools that a loss is extremely low, the pen core utilization rate is high.

Claims

1, a kind of Pencil sharpener, form by a plastics knife rest (1), blade (2), hold-down screw (3), adjusting handle (4), screw rod (5), Pencil joint holder (6), it is characterized in that having on the knife rest (1) a garden taper hole, and continuously at its two ends have a garden cylindrical hole that diameter does not wait, three holes are coaxial, and Pencil joint holder (6) inserts in the hole, garden of knife rest (1).

2, by the described pencil sharpener of claim 1, the two ends that it is characterized in that Pencil joint holder (6) are respectively equipped with garden cylindrical hole or hex hole, adjusting handle (4) partly puts in the breach of blade (2), and adjusting handle (4) links by the bearing of screw rod (5) with knife rest (1).

3, by the described pencil sharpener of claim 1, it is characterized in that the postmedian edge of blade (2) has a breach.

4, by the described pencil sharpener of claim 1, the supplementary angle that it is characterized in that the bending angle of blade (2) equals half of knife rest (1) garden taper hole bus angle.

5,, it is characterized in that the blade of blade (2) is made up of for three sections straight sword, Qu Ren, straight sword by the described pencil sharpener of claim 1.

6, by the described pencil sharpener of claim 1, it is characterized in that the garden taper hole axis of blade and knife rest (1) is 0 "～8 " at the angle of small end.