CN2625159Y

CN2625159Y - Propelling pencil

Info

Publication number: CN2625159Y
Application number: CN 03234316
Authority: CN
Inventors: 金勇平
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-05-07
Filing date: 2003-05-07
Publication date: 2004-07-14
Anticipated expiration: 2013-05-07

Abstract

The utility model relates to a pencil, in particular to a flexible drafting pencil with spiral propelling, which comprises a pencil core, a pencil head, a resistance ring, a pencil liner sleeve, a pencil holder sleeve, a pencil holder, a pencil liner, a slide block, a pin, an oblique block and a chute. A pencil core contraction preventing device of the utility model is composed of a chute, a sphenoid oblique block, a slide block with threads at its top and a pencil holder with internal threads; the pencil holder sleeve is positioned outside the pencil holder; the pencil holder sleeve and the pencil liner are positioned by a pin. When the pencil holder sleeve rotate relatively to the pencil holder, the pencil liner can also rotate relatively to the pencil holder, so that the slide block that engages with the internal threads of the pencil holder can slide forward or backward in a rectangular chute and the pencil core can extends out, the contraction can be prevented or the contraction prevention can become invalid. The utility model adopts square shape or flat shape pencil cores as flexible pencil cores, which saves the time and labor for the drafters to draw heavy lines.

Description

A kind of propelling pencil

Affiliated technical field

The utility model relates to a kind of pencil, especially relates to a kind of spiral and passes the formula Propelling pencil for drawing.

Background technology

At present, the used pencil pen core of designing and mapping personnel is circle or flat pen core at present, every with after a period of time, stroke lines chap gradually during drawing, stroke weight differs when causing drawing, in order to address this problem, the drawing personnel often will cut pencil, to keep the pen core thickness constant, the propelling pencil of the present circular pen core of many uses can make mapper person cut, but flat or square pen core are never had solution preferably, application number is to have proposed a kind of new method for designing in 96103183.2 Chinese patent application, and this propelling pencil is by the pen core storehouse sub-assembly of uniform thickness pen core process, and F holds penholder, pen core outlet reinforcing sleeve, interior hole shape of collet and uniform thickness pen core adapt and it can be clamped, and by parts such as coupling sleeves above-mentioned part are not relatively rotated.When drawing heavy line, time saving and energy saving, improved and given plot quality, yet owing to giving the figure personnel when drawing heavy line, often firmly bigger, it is less that the while is examined coefficient owing to the pencil pen core rubs, take the chuck of above-mentioned design, be not easy to clamp pen core, easily cause the pen core retraction during use.

The invention provides a kind of new propelling pencil design, it can use the pencil pen core of square or flat as movable refill, thereby the drawing personnel need not be cut also can directly draw the heavy line that obtains even thickness, the present invention simultaneously preferably resolves the problem that the drawing pencil pen core does not tightly bounce back because of folder owing to adopted penholder with Luo line and unique anti-travelling backwards design.

Summary of the invention

In order to overcome existing drawing propelling pencil shortcoming, the utility model provides a kind of drawing propelling pencil simple in structure, and the utility model propelling pencil is made up of pencil-lead, nib, resistance circle, barrel cover, Pen-holder sleeve, penholder, barrel, slide block, pin, skewback, chute.It is the chute of rectangle that one cross section is wherein arranged in the barrel, can pack into rectangle or flat pen core, the barrel front end is with a barrel cover and resistance circle outward, can clamp barrel, thereby clamping pen core, there is the penholder of a hollow barrel outside, the penholder front end accompanies nib, penholder inside has internal thread, there is the threaded slide block of a wedge shape skewback and top at the pen core rear portion in the rectangle chute in the barrel, when packing pen core or pen core retraction into from the front, push the wedge shape skewback and move backward, the wedge shape of wedge shape skewback is partly pierced between slide block and the rectangle chute bottom, thereby raised slide block, cause the internal thread interlock mutually of external screw thread with the penholder on slide block top, thereby stoped the retraction of pencil-lead.There is a Pen-holder sleeve penholder outside, positions with a pin between Pen-holder sleeve and the barrel.When Pen-holder sleeve rotates with respect to penholder, barrel is also the same with Pen-holder sleeve to rotate to penholder, thereby make with the internal thread of penholder mutually the slide block of interlock in the rectangle chute, take place to front or rear slip, thereby realize pen core stretch out and anti-retraction or anti-retraction lost efficacy.

The principal character of the utility model propelling pencil is that its spiral push unit adopts chute, wedge shape skewback, the threaded slide block in top and inner threaded penholder to form, and this device also has anti-pen core retraction function.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a main pseudosection of the present utility model.

Fig. 2 is an A-A profile of the present utility model.

Fig. 3 is a B-B profile of the present utility model.

Fig. 4 is a C-C profile of the present utility model.

1 pencil-lead among the figure, 2, nib, 3, the resistance circle, 4, the barrel cover, 5, Pen-holder sleeve, 6, penholder, 7, barrel, 8, slide block, 9, pin, 10, skewback, 11, chute.

In Fig. 1, one rectangle chute (11) is wherein arranged in the barrel (7), can pack into rectangle or flat pen core (1), barrel 7 front ends are with a barrel cover (4) and resistance circle (3) outward, can clamp barrel 7, thereby clamp pen core (1), there is the penholder (6) of a hollow barrel (7) outside, the penholder front end accompanies nib (2), this penholder (6) inside has internal thread, there is a threaded slide block of wedge shape skewback (10) and top (8) at pen core (1) rear portion in the rectangle chute (11) in the barrel (7), when packing pen core (1) or pen core (1) retraction into from the front, pushing wedge shape skewback (10) moves backward, the wedge shape of wedge shape skewback (10) is partly pierced between slide block (8) and rectangle chute (11) bottom, thereby raised slide block (8) position, caused the internal thread interlock mutually of external screw thread with the penholder (6) on slide block (8) top, thereby stoped the retraction of pencil-lead (1).There is a Pen-holder sleeve (5) penholder (6) outside, positions with a pin (9) between Pen-holder sleeve (5) and the barrel (7).When Pen-holder sleeve (5) with respect to penholder (6) when rotating, barrel (7) is also the same with Pen-holder sleeve (5) to rotate to penholder (6), thereby make with the internal thread of penholder (6) mutually the slide block of interlock (8) in rectangle chute (11), take place to front or rear slip, thereby realize pen core (1) stretch out and anti-retraction function or anti-retraction lost efficacy.

Claims

1, spiral is passed the formula Propelling pencil for drawing, it is characterized in that having internal and external threads can close can from screw, can promote lead for retractable pencil and can prevent pen core retraction, this device by chute, wedge shape skewback, the threaded slide block in top and inside have with the slide block screw thread mutually the hollow penholder of the internal thread of interlock form.

2, the described Propelling pencil for drawing of claim 1 is characterized in that the chute cross section of dress pen core in this pencil is a rectangle.

3, the described Propelling pencil for drawing of claim 2 is characterized in that the used pen core cross section of this pencil is rectangle or ellipse.