CN2621119Y

CN2621119Y - Improved blackboard-writing pen

Info

Publication number: CN2621119Y
Application number: CN 03261325
Authority: CN
Inventors: 热合曼·艾买提
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-05-16
Filing date: 2003-05-16
Publication date: 2004-06-23
Anticipated expiration: 2013-05-16

Abstract

This utility model discloses an improved blackboard writing pen, consisting of a pen container which is formed by a pen body and a pen nib, the pen container is arranged with a hollow pencil lead, the upper end of the pencil lead is arranged with a cap passing through a hole on the upper end of the pen body, the outer wall of the lower part of the pencil lead is arranged with bulges which are axissymmetrically arranged, the outer margin wall of the lower end of the pencil lead expands gradually outward, thus forming a conical surface which contacts with the inside wall of a bottling pylome of the lower end of the pen nib, the conical surface is located outside the bottling pylome of the lower end of the pen nib, the axial tube wall of the lower end of the pencil lead cuts an axial symmetry arranged wedge-shaped notch, a compression spring is sleeved onthe pen lead between the bulges arranged on the outer wall of the pen lead and the bottling pylome of the lower end of pen lead. Writers does not need to contact the chalk when using the pen, thus effectively preventing the chalk corrosion to hands, and preventing the chalk breaking, thereby the waste on chalk is reduced.

Description

Improved writing on the blackboard pen

Technical field

The utility model belongs to teaching aid, relates to a kind of improved writing on the blackboard pen.

Background technology

At present, writing on the blackboard apparatus in the middle of all kinds of schools mostly is chalk, teachers hold chalk and write on blackboard, chalk contacts with hand for a long time, make teachers' finger be subjected to the corrosion of chalk, skin becomes to wrinkle more in dry day, in addition, traditional writing on the blackboard mode makes chalk be easy to rupture and produces more chalk head that the chalk waste is very big.

Summary of the invention

Hand did not directly contact chalk when the purpose of this utility model was to provide a kind of improved writing on the blackboard pen to write with it, had effectively prevented chalk adversary's corrosion, thereby and can also prevent that chalk fracture from having reduced the waste of chalk.

The purpose of this utility model is achieved in that a kind of improved writing on the blackboard pen, comprise the pen container of forming by a body that is installed together and nib, the pen core of hollow is housed in the pen container, the upper end of pen core is provided with the pressure cap of holding through hole to pass from pen on one's body, pen core bottom outer wall is provided with the projection of arranging axisymmetricly, the outer rim perisporium of pen core lower end outwards expands gradually and forms and the contacted conical surface of written lower end necking down through-hole wall, the described conical surface is positioned at the outside of written lower end necking down through hole, cutting has the wedge-formed incision of arranging axisymmetricly on the axial tube wall of pen core lower end, is set with the compression spring on the pen core between projection that is provided with on the pen core outer wall and the written lower end necking down through hole.

During use, depressing pressure cap earlier makes the pen core lower end conical surface stretch out and outwards open, in pen core, load onto chalk, unclamping pressure cap returns pen core under the effect of compression spring, the pen core lower end conical surface tightens up along wedge-formed incision because of being subjected to written lower end necking down through hole extruding, the chalk that the pen core lower end is stretched out sucks tightly simultaneously, can write.When the chalk that stretches out when the pen core lower end is soon used up, depress pressure cap and the pen core lower end is stretched out open, chalk is elongated some can continue to use.Hand does not directly contact chalk when writing with it, has effectively prevented chalk adversary's corrosion.If falling on the ground, chalk ruptures easily when directly writing with the grasped chalk, much directly thrown away before the chalk of fracture and known clearly, chalk is contained in the utility model pen core, even it falls on the ground, chalk also is not easy fracture, and is disconnected even chalk is wherein shaken, because chalk is contained in the pen core, can also continue to use, thus the waste of minimizing chalk.

Description of drawings

Accompanying drawing is that master of the present utility model looks cross-sectional view.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail, a kind of improved writing on the blackboard pen, as shown in the figure, comprise by a body 2 that is installed together and nib 6 pen containers of forming, the cylindric pen core 3 of hollow is housed in the pen container, the upper end of pen core 3 is provided with the pressure cap 1 that passes from a body 2 upper end through holes, and the lower end of pressure cap 1 is sleeved on the upper end outer wall of pen core 3.The bottom outer wall of pen core 3 is provided with the projection 4 of arranging axisymmetricly, and the outer rim perisporium of pen core 3 lower ends outwards expands gradually from top to bottom and forms and the contacted conical surface of written 6 lower end necking down through-hole walls, and the described conical surface is positioned at the outside of written 6 lower end necking down through holes.Cutting has the wedge-formed incision 7 of arranging axisymmetricly on the axial tube wall of pen core 3 lower ends, because the existence of wedge-formed incision 7 is arranged, the lower end tube wall of pen core 3 is easily deformable when being subjected to written 6 lower end through holes extruding to be shunk to the center, so just easily the chalk of pen core 3 lower ends dress is tightened.Be set with compression spring 5 on the pen core tube wall between projection 4 that is provided with on pen core 3 outer walls and the written 6 lower end necking down through holes, compression spring 5 can make pen core 3 move up, thereby the lower end conical surface of pen core 3 is tightened up by the extruding of the necking down through hole of written 6 lower ends.

Claims

1. improved writing on the blackboard pen, comprise the pen container of forming by a body (2) that is installed together and nib (6), the pen core (3) of hollow is housed in the pen container, the upper end of pen core (3) is provided with the pressure cap (1) that passes from a body (2) upper end through hole, it is characterized in that: pen core (3) bottom outer wall is provided with the projection (4) of arranging axisymmetricly, the outer rim perisporium of pen core (3) lower end outwards expands gradually from top to bottom and forms and the contacted conical surface of nib (6) lower end necking down through-hole wall, the described conical surface is positioned at the outside of nib (6) lower end necking down through hole, cutting has the wedge-formed incision (7) of arranging axisymmetricly on the axial tube wall of pen core (3) lower end, is set with compression spring (5) on the pen core (3) between the projection (4) that is provided with on pen core (3) outer wall and nib (6) the lower end necking down through hole.