CN2297320Y - Propelling chalk - Google Patents

Abstract

The utility model relates to a movable chalk. The utility model can prevent a writing person from directly contacting with a naked chalk (namely a chalk core), and can freely control the length of the writing section of the chalk core. A core protecting rod is sheathed on the outer face of the chalk core, a spring between the core protecting rod and a sleeve pipe is used so that a chalk head is clamped and the chalk core is released. The sizes of cross sections of both ends of the chalk core are the same. The utility model can be flexibly used for a long time only the writing person holds an outer sleeve and presses a push bottom by a hand.

Description

The multifunctional movable chalk

The utility model relates to the school supply and stationery of writing usefulness, is the chalk that can isolate pencil lead and the direct pencil lead activity that contacts of the hand of writing.

At present, known used chalk is that the author directly holds bare chalk and writes with hand-tight, the chalk dust of full hand, and long-term pollution is corroded both hands.When the finger tip skin was hindered, its deeply worried sensation was the most outstanding.And chalk loses outer room protection, although length is short, damaging easily fractures, and carries also inconvenient.Specification is single, writes large size word or plate picture, and this a few nothing is arranged.Moreover a body is too thin, is difficult for holding, and it is more difficult to wield the pen, and hand for holding pencil easily turns sour.Word is difficult to write, and the calligraphy of the soft pen of hard-tipped pen is all difficult directly to be used.

The purpose of this utility model provides a kind of multifunctional movable chalk.It not only isolates direct contact of writing with bare chalk (pencil lead), and can control pencil lead freely and the length of writing part, both provides outer protection to pencil lead, carries clean and convenient again.Pencil lead length increases, and specification is many, and the two ends section is identical.Body increases and is easy to hold, and the convergent pen of the mode that holds a pen can directly use pen calligraphy.Pencil lead system is big, and is soft relatively, the writing distinctness, and even thickness is easily write and is wiped.

The purpose of this utility model is achieved in that to set up outside the identical pencil lead of many specification two sections protects core bar, the upper end of protecting core bar connects snapper, the protruding circle ring of giving birth in middle part, the arm that the lower end cracking can be upheld and shrink, this arm is by Bao Erhou, and arm is pacified spring outward, the circle ring of the protruding life in top on the spring, support the pencil lead cover down and close up, pacify sleeve pipe again.Spring flexible makes and protects core bar lower end and pen point casing and close up and produce displacement, arbitrarily broadcast or clamp pencil lead.When enabling, with nib down, press to press and turn round, protect the core bar lower end and stretch out the pen point casing closing in, four arms are opened outward, and pencil lead falls naturally.Control exposes the length of pencil lead according to demand, promptly pencil lead from the dais or other keep out the distance of object plane.Loosen snapper again, protect core bar and inwardly advance with the elastic force of spring again, protect in four arms of core bar lower end and contract, the chucking pencil lead.Because of four arm inner faces are exasperate, frictional force is bigger, and four arm smooth in appearance, the frictional force that itself and pen point casing close up is less.When writing,, advance and protect core bar by the dynamics of starting to write.At this moment, pencil lead does not contract in not only not understanding, and blocks tightlyer on the contrary.After the pencil lead ablation is too short, load onto pencil lead again, repeat above action and just can continue.

Owing to adopt such scheme, not only realized the purpose of this utility model, and everyone is equipped with the Propelling chalk and the corresponding pencil lead of one or the various models of a cover, just can use for a long time.

In conjunction with the embodiments and accompanying drawing, further specify

Figure one constitutes schematic diagram for parts.

Figure two is pencil lead figure, and pencil lead size length specification is many.

Among the figure: (1) snapper (2) sleeve pipe (3) protects core bar (4) pencil lead (5) spring

(6) elastic cover (7) pencil lead cover (8), (9) connect with screw thread (10) protruding

The circle ring (11) of giving birth to protects four arms (12) pen of core bar lower end progressive additive

Headgear closes up

Among the figure one, when stopping using, spring (5) is upheld, to protect in the core bar (3) pushing away, lower end four arms (11) are received (12) mouth with pen point casing and are flushed, and pencil lead (4) is in safely and protects in the core bar (3), protect four arms (11) of core bar lower end progressive additive, by pen point casing closing in (12) compression.At this moment, its internal diameter is less than the pencil lead diameter, and pencil lead can not expose.The circle ring (10) that protects the protruding life of core bar again supports toward sleeve pipe (2), protects core bar and can outwards not eject.During use, firmly press snapper (1), protect core bar lower end (11) and stretch out pen point casing and close up (12), four arms (11) are outer to be opened, and pencil lead (4) tenesmus props up plane, dais etc. and keeps out thing, and control needs the length used.Loosen snapper again, protect core bar, protect core bar lower end four arms (11) and shrink, to tightening pencil lead (4) with pen point casing closing in (12) with advancing in the spring (5).So just can arbitrarily write.Because of its body gradually is same as pen, the mode that holds a pen also can convergent pen, conveniently writes the favourable letter written with chalk of finishing writing., press snapper with the back nib up, pencil lead falls to naturally and protects in the core bar.Exposed parts is zero, loosens snapper again.At this moment, arbitrarily lay also and can not pollute foreign object.

Claims (2)

1, a kind of multifunctional movable chalk, its feature: outside the identical pencil lead of many specification two sections, set up and protect core bar, the upper end of protecting core bar connects snapper, the protruding circle ring of giving birth in middle part, the arm that the lower end cracking can be upheld and shrink, this arm is by Bao Erhou, arm is pacified spring outward, the circle ring of the protruding life in top on the spring supports the pencil lead cover down and closes up, and pacifies sleeve pipe again.

2, multifunctional chalk according to claim 1, its feature: flexible the making of spring protected core bar lower end and pen point casing closing in generation displacement, arbitrarily broadcasts or clamp pencil lead.

Images