CN201214339Y

CN201214339Y - Automatic clamping device for preventing chalk from being broken

Info

Publication number: CN201214339Y
Application number: CNU200820081369XU
Authority: CN
Inventors: 张云伟; 陈晶
Original assignee: Kunming University of Science and Technology
Current assignee: Kunming University of Science and Technology
Priority date: 2008-06-19
Filing date: 2008-06-19
Publication date: 2009-04-01
Anticipated expiration: 2018-06-19

Abstract

The utility model provides an anti-snap automatic chalk-holding device, which comprises an outer chalk tube, an inner chalk tube, a head, a cap, an end cover, a spring and metal clamping pieces; wherein, the inner chalk tube, the lower end of which is provided with a tapered slotted hole and the upper end of which is provided with the cap, is inserted in the center of the outer chalk tube; a chalk is placed in the inner chalk tube; and the head is fixed on the lower end of the outer chalk tube. When the cap is pressed, the metal clamping pieces move downwards, a lug inside the head stops the metal clamping pieces to pass, the metal clamping pieces upwardly compress the spring, and the slotted hole is released from the clamping of the metal clamping pieces to expand, so that the chalk can be loosened in order to adjust the protruded length of the chalk. After the cap is loosened, the spring can act on the inner chalk tube and the metal clamping pieces, so that the inner chalk tube can return to the original position and the metal clamping pieces can clamp the slotted hole. The chalk-holding device can be used conveniently, moreover, when the chalk-holding device is used, a user is not directly contacted with the chalk, so, not only hygiene can be guaranteed, but also the chalk can be prevented from being snapped when being used, as a result, the cost can be saved, and the waste can be reduced. The chalk-holding device is generally used by the users who use tapered chalks.

Description

The anti-breaking automatic clamping device of chalk

Technical field

The utility model relate to a kind of with the chalk be pen core can be effectively anti-breaking the anti-breaking automatic clamping device of chalk, particularly with the taper chalk be pen core can be effectively anti-breaking the anti-breaking automatic clamping device of chalk, belong to a kind of cultural goods.

Background technology

Chalk is a writing implement commonly used in the teaching, in usual use, there is a lot of drawbacks, at first chalk and user long-term to contact meeting harmful to using skin, secondly chalk is used when also surplus a bit of, because of user's inconvenience is grabbed by giving it up, and the user is easily broken because of the more chalk that causes of impetus of finger when using chalk, has further caused waste.

Summary of the invention

The purpose of this utility model is to propose the anti-breaking automatic clamping device of a kind of chalk, and chalk is not fractureed in the process of using, and do not waste, and the user does not directly contact with chalk, does not pollute skin.

The technical solution of the utility model is achieved in that the anti-breaking automatic clamping device of this chalk comprises outer pen container 1, interior pen container 2, nib 3, the cap for brush 4, spring 6, metal intermediate plate 7, end cap 8, pen container 2 its bottoms are that outer surface is conical in described, inner surface is cylindrical, and vertically have a taper slotted eye in groove and hole along cone, there is a projection 9 described outer pen container 1 its lower end, interior pen container 2 places outer pen container 1, there is the cap for brush 4 its upper end, there is metal intermediate plate 7 outside of the taper slotted eye of its lower end, spring 6 is arranged above the metal intermediate plate 7, metal intermediate plate 7 and spring 6 are enclosed within interior pen container 2 bottoms, there is end cap 8 upper end of outer pen container 1, and the lower end is fixed with a nib 3.

When used chalk was the taper chalk, the utility model further also can be realized like this: the taper slotted eye of interior pen container bottom, its endoporus also are taper, and its tapering is identical with the chalk tapering.

The beneficial effects of the utility model are, owing to used this clamping device, can directly not contact with chalk when the user uses, and have overcome the defective of chalk to user's skin damage; Because the user holds this device and do not arrest chalk when using, impetus is only in the chalk termination, so chalk can not fracture, therefore, has reduced the waste that fractureing of chalk causes.

In the pen container, by the taper slotted eye clamping of interior pen container, its chucking power derived from the metal intermediate plate, holds outer pen container or nib when the end user uses in chalk was contained in.When pressing the cap for brush, stretch the cone tank bore portion of pen container and stretching out of chalk in the projection in the nib does not stop outside under the taper slotted eye, and block stretching out of metal intermediate plate, the constraint that makes the taper slotted eye break away from the metal intermediate plate realizes expansion, the chalk decline of just taking advantage of a situation, enter nib, after hand loosens the cap for brush, spring reset, pen container is replied the normal position in promoting, metal intermediate plate clamping slot hole, by a cap for brush, the chalk extension elongation exceeds nib, can write again.

Description of drawings

Accompanying drawing 1 is a cutaway view of the present utility model;

Among the figure: 1 outer pen container, 2 interior pen containers, 3 nibs, 4 caps for brush, 5 chalks, 6 springs, 7 metal intermediate plates, 8 end caps, 9, projection.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

When using conical chalk, the taper slotted eye of the interior pen container lower end that the utility model uses, its outer surface be taper shape, and inner surface is the tapering taper shape identical with the chalk tapering.Extract the cap for brush chalk is put into interior pen container, during not according to the following cap for brush, under the effect of metal intermediate plate, chalk is pressed the cap for brush by the clamping of taper slotted eye during use, act on interior pen container, under the restriction of written internal protrusion, the metal intermediate plate is prevented from, and the cone tank bore portion can pass through, and the constraint that makes the cone tank bore portion break away from the metal intermediate plate realizes expansion, the chalk decline of just taking advantage of a situation, enter nib, continue to push and to make chalk stretch out nib, reach and unclamp the cap for brush when needing length, the withdrawal of taper slotted eye, pen container and metal intermediate plate in the spring action, interior pen container sets back, metal intermediate plate clamping slot hole.If the time spent can not pinned the cap for brush chalk lower end edge is axially gently pressed on blackboard, chalk is pressed in the nib completely, as long as one by the cap for brush, chalk has just got outta there very much next time in the time will using.

Claims

1, the anti-breaking automatic clamping device of chalk, it is characterized in that: this device mainly comprises outer pen container (1), interior pen container (2), nib (3), the cap for brush (4), spring (6), metal intermediate plate (7), end cap (8), its bottom of pen container (2) is that outer surface is conical in described, inner surface is cylindrical, and vertically have a taper slotted eye in groove and hole along cone, there is a projection (9) its lower end of described outer pen container, interior pen container (2) places outer pen container (1), there is the cap for brush (4) its upper end, there is metal intermediate plate (7) outside of the taper slotted eye of its lower end, spring (6) is arranged at the top of metal intermediate plate (7), metal intermediate plate (7) and spring (6) are enclosed within interior pen container (2) bottom, there is end cap (8) upper end of outer pen container (1), and the lower end is fixed with a nib (3).

2, the anti-breaking automatic clamping device of chalk according to claim 1 is characterized in that: its bottom of pen container (2) is that outer surface is that taper shape, inner surface are the tapering conical taper slotted eye identical with the chalk tapering in described.