CN2207938Y

CN2207938Y - Rotary-inserting propelling chalk

Info

Publication number: CN2207938Y
Application number: CN 94247811
Authority: CN
Inventors: 唐培英
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-12-12
Filing date: 1994-12-12
Publication date: 1995-09-20
Anticipated expiration: 2004-12-12

Abstract

The utility model provides a rotary-inserting movable chalk, which is formed by the connection of a chalk holder, a bottom bracket, a chalk sheath, a column-shaped chalk core and a chalk cap, wherein, the chalk holder is provided with two longitudinal through slots; the bottom bracket is provided with double connecting ear; the chalk sheath is provided with two internal spiral grooves. The utility model has the advantages of novel structure, less raw material consumption, no direct contact with the chalk core in writing and convenient operation and is a new writing tool.

Description

Rotary-inserting propelling chalk

The utility model relates to a kind of Propelling chalk with the screw propulsion pen core.It belongs to a kind of writing appliance.

Chalk is in people's daily life, a kind of writing on the blackboard instrument that especially must use in the teaching.Existing chalk mostly is round table-like, directly grips with hand during use, is easy to fracture in writing; And, cause waste residue butt end nib being abandoned when complete; Particularly the dust pickup of chalk finger influences health, and it uses inconvenience.

The purpose of the utility model provides a kind of Propelling chalk, and finger does not directly touch the powder core during use, and handwriting is frangibility not, avoids a powder to be sticky with, and is easy to use.

Solution of the present utility model is: adopt by the tubulose penholder that is shaped on axial pass trough, device has the collet of duplex ear in the penholder pipe, plug-in mounting pillar powder core in the collet, the penholder outside interlocks the pen cap that is shaped on the inside spin groove, the screw-pushing type Propelling chalk that the pen cap top cover dress cap for brush is formed.During use, chalk post core is inserted in the collet, hold an overcoat and write, can be according to the powder core wear intensity rotation pen cap, make collet that pen cap inner spiral groove is connected move axially, with the outside propelling that realizes the powder core or inside retraction along the guide groove of penholder.

Because above-mentioned solution adopted the screw-pushing type Propelling chalk, but the limit advances the powder core with the limit, makes the stressed evenly frangibility not of powder core; Finger does not directly grip the powder core when writing, and has avoided a powder to be sticky with; This powder core is a cylinder, but more existing round table-like chalk conservation is more than 20%.Its novel structure, easy to use, be a kind of novel writing appliance.

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

Fig. 1 is the profilograph of the utility model concrete structure.

Fig. 2 be among Fig. 1 A-A to cutaway view.

Fig. 3 is that the utility model is the cutaway view of collet among Fig. 1 (4).

Fig. 4 is the vertical view of collet among Fig. 3 (4).

Fig. 5 is the left view of collet among Fig. 3 (4).

Fig. 6 is that the utility model is the cutaway view of the pen cap among Fig. 1 (3).

Fig. 7 is the upward view of the pen cap among Fig. 6 (3).

Fig. 8 is that the utility model is the left view of penholder among Fig. 1 (5).

Fig. 9 is the vertical view of penholder among Fig. 8 (5).

As shown in Figure 1, the utility model comprises: penholder (5), the pen cap (3), collet (4), powder core (2) and the cap for brush (1).Be shaped on two symmetrical vertical grooves (seeing Fig. 8, Fig. 9) on the body of penholder (5), in order to collet (4) guide-localization of cross-under.Be shaped on two on the inboard wall of tube body of the pen cap (3) with rotation direction and axial symmetrical helical groove (seeing Fig. 6, Fig. 7).Be shaped on the symmetrical Shi Lianer that lives on the both sides outer wall of collet (4), be shaped on the vertical fin of 4-8 bar (seeing Fig. 3, Fig. 4, Fig. 5) on the inwall.Powder core (2) is a cylinder.Powder core (2) bottom is plugged in collet (4), collet (4) is loaded in the pore of penholder (5), the both sides connection ear of collet (4) vertical groove of break-through penholder (5) respectively is connected movingly with the inside spin groove of the pen cap (3), the pen cap (3) is connected on the penholder (5), and the convex edge that makes penholder (5) top connects the inner groovy of the pen cap (3) movingly, and the cap for brush (1) housing is in the pen cap (3) top.

Claims

1, a kind of screw type Propelling chalk that contains the powder core, it is characterized in that this Propelling chalk also comprises the penholder (5) that is shaped on two vertical grooves, the collet (4) that has the duplex ear, be shaped on the pen cap (3) and the cap for brush (1) of two inside spin grooves, the powder core is a cylindric powder core (2), powder core (2) bottom is plugged in collet (4), collet (4) is loaded in the pore of penholder (5), the both sides connection ear of collet (4) vertical groove of break-through penholder (5) respectively is connected movingly with the inside spin groove of the pen cap (3), the pen cap (3) is connected in penholder (5), and the cap for brush (1) housing is in the pen cap (3) top.

2, Propelling chalk according to claim 1, it is characterized in that two inside spin grooves of the pen cap (3), groove be two with rotation direction and axial symmetrical helical groove.

3, Propelling chalk according to claim 1 is characterized in that being shaped on the vertical fin of 4-8 bar on the inwall of collet (4).