CN2292677Y

CN2292677Y - Chalk holder

Info

Publication number: CN2292677Y
Application number: CN 97234461
Authority: CN
Inventors: 张关礼
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-05-05
Filing date: 1997-05-05
Publication date: 1998-09-30
Anticipated expiration: 2007-05-05

Abstract

The utility model relates to a movable chalk which uses a blackboard as a writing object. The utility model is composed of a chalk sleeve, a feeding spring, a telescopic sleeve, a chalk, etc. The utility model has the advantages of convenient use, fluent writing, catering of traditional writing habit and no hand pollution and damage in addition, to the writing functions of conventional chalks and the existing public known technology. The telescopic length of chalks can be freely regulated, a chalk can be effectively controlled without being fallen off from the telescopic sleeve particularly under the condition that the chalk is to be used up, use rate of chalks is improved, waste is avoided, resource is saved, and the defects of the traditional writing mode and the existing public known technology are recuperated.

Description

Propelling chalk

The utility model relates to a kind of writing implement, especially relate to a kind of with blackboard as the Propelling chalk of writing object.

The application of chalk in daily life and work is very widely.It in use has the finger of pollution, fractures easily, causes waste, carries the drawback of inconvenience.Even existing known technology such as ZL932250203, also exist the volume hypertrophy, moulding is dull, write inconvenience, feel not good, run counter to traditional shortcomings such as writing style, especially can not optionally regulate the collapsing length of chalk, controlling chalk does not effectively come off from telescopic, use up gradually at chalk, the diameter of chalk and having under the corresponding situation about reducing of clamping force between the telescopic of slot, exist the elastic force that relies on the feeding spring and directly regulate the collapsing length of chalk, the defective that can cause chalk from telescopic, to come off.

The purpose of this utility model provide a kind of remedy traditional ways of writing and existing known technology defective be convenient to write, cater to traditional writing style, can optionally regulate the collapsing length of chalk, control the Propelling chalk that chalk does not come off effectively from telescopic.

The purpose of this utility model be achieved in that it comprise the pen cap, the pen cap be built-in be with the feeding spring on telescopic, the telescopic, telescopic is built-in with chalk, one projection is arranged on the symmetrical center line of pen cap front inner wall, and have one to contain projection and can produce along the chute of the symmetrical center line relative displacement of projection on the positioning sleeve that the pen cap links to each other with projection.

The task that the utility model proposed is further finished by following technical proposals: projection and chute can be 1 font or T font, the front end of telescopic has slot and concavo-convex wedge mouth, slot and concavo-convex wedge mouth can be a plurality of, on the inwall of the nearly slot opening part of telescopic front end outstanding ratchet is arranged, ratchet can be a plurality of, multilayer.

The utility model is owing to adopt such scheme, and except that the writing function with conventional chalk and existing known technology, easy to use in addition, fluent writing cater to traditional writing style, not the characteristics of stained hand.Because of the feeding spring through the ratchet indirectly-acting on chalk, so under the situation that chalk is about to use up, can regulate the collapsing length of chalk effectively, the control chalk does not come off from telescopic, thereby has improved the utilization rate of chalk, has avoided waste, has saved resource.

Below in conjunction with drawings and Examples the specific embodiment of the present utility model is described in further detail.

Fig. 1 is a stereochemical structure expanded view of the present utility model.

Fig. 2 is a stereochemical structure half sectional view of the present utility model.

Fig. 3 is the stereogram of positioning sleeve of the present utility model.

With reference to accompanying drawing, telescopic 4 of the present utility model is built-in with between chalk 5 and two steps 11 by the internal diameter of the internal diameter of ratchet 6 clamping chalks 5, the pen cap 2 and telescopic 4 and is equipped with feeding spring 3, makes concavo-convex wedge mouth 7 on positioning sleeve 1 and the telescopic 4 and the projection 9 on the chute on the positioning sleeve 18 and the pen cap 2 make relative telescopic displacement by pressing telescopic 4 compressing feeding springs 3.Insert on the pocket for ease of carrying available penholder 10.By pressing telescopic 4, go into chalk 5 to the suitable length of writing from an end plug of slot 12, unclamp telescopic 4 and can write.

Projection 9 of the present utility model and chute 8 can be 1 font or T font, and one section of telescopic 4 front ends is cone, and positioning sleeve 1 is stationary fit with the cone one tangent line place of telescopic 4 front ends, and the positioning sleeve 1 and the pen cap 2 are for movingly.After in the utility model, filling in chalk 5, with thumb by pressing telescopic 4, feeding spring 3 is compressed, telescopic 4 is released the chalk 5 through ratchet 6 clampings synchronously, rely on simultaneously between positioning sleeve 1 and telescopic 4 and the pen cap 2 quiet, reach relation between projection 9 and the chute 8 movingly, drive the relative displacement that the positioning sleeve 1 and the pen cap 2 produce 2mm, be that chalk 5 is pushed out 2mm, thereafter the cone of telescopic 4 front ends and positioning sleeve 1 break away from the stationary fit state, make ratchet 6 on the telescopic 4 because of the plasticity cause of material, loose by the chalk 5 of ratchet 6 clampings.For chalk 5 is not relatively rotated with the pen cap 2, identical with the concavo-convex wedge mouth 7 on the positioning sleeve 1 through the concavo-convex wedge mouth on the telescopic 4 of ratchet 6 clamping chalks 57.When thumb broke away from telescopic 4, feeding spring 3 discharged tension force, and the relative displacement reduction that produces between telescopic 4, positioning sleeve 1, the pen cap 2 is resetted, and the chalk 5 of 2mm is released in ratchet 6 clampings by ratchet 6.Press telescopic 4 continuously, make feeding spring 3 be in the tension alternating with relaxation state, then chalk 5 continuously is pushed out telescopic 4.The length of writing that the utility model can be regulated chalk 5 arbitrarily, effectively according to user's writing style and user mode.

Claims

1. Propelling chalk, it comprise the pen cap, the pen cap be built-in be with the feeding spring on telescopic, the telescopic, telescopic is built-in with chalk, it is characterized in that: a projection is arranged on the symmetrical center line of pen cap front inner wall, and have one to contain projection and can produce along the chute of the symmetrical center line relative displacement of projection on the positioning sleeve that pen cap front end links to each other with projection.

2. a kind of Propelling chalk according to claim 1 is characterized in that: projection and chute can be " 1 " fonts.

3. a kind of Propelling chalk according to claim 1 is characterized in that: projection and chute can be the T fonts.

4. a kind of Propelling chalk according to claim 1 is characterized in that: the front end of telescopic has slot and concavo-convex wedge mouth.

5. a kind of Propelling chalk according to claim 1 is characterized in that: have on the positioning sleeve with telescopic on the concavo-convex wedge mouth that matches of concavo-convex wedge mouth.

6. a kind of Propelling chalk according to claim 4 is characterized in that: slot and concavo-convex wedge mouth can be a plurality of.

7. a kind of Propelling chalk according to claim 4 is characterized in that: on the inwall of the nearly slot opening part of telescopic front end outstanding ratchet is arranged, ratchet can be a plurality of, multilayer.