CN203093415U

CN203093415U - Dustproof chalk

Info

Publication number: CN203093415U
Application number: CN 201220641926
Authority: CN
Inventors: 曾小平
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-11-29
Filing date: 2012-11-29
Publication date: 2013-07-31
Anticipated expiration: 2022-11-29

Abstract

The utility model discloses a dustproof chalk which comprises a chalk tube and a chalk head, wherein a chalk core tube is arranged in the chalk tube; chalks are filled in the chalk core tube; the lower end of the chalk core tube is of a funnel shape; and a chalk guiding groove is formed in the lower end of the chalk core tube and corresponds to a chalk outlet of the chalk head. The dustproof chalk disclosed by the utility model is reasonable in structure and is simple in manufacturing; and according to the dustproof chalk, the defects that a traditional chalk is needed to be directly held by a teacher to write and teachers and other users easily feel discomfort due to the fact that hands are fully stained with chalk dust are effectively overcome; and meanwhile, the chalks are saved.

Description

Dustproof chalk

Technical field

The utility model relates to a kind of chalk, is specifically related to a kind of dustproof chalk.

Background technology

The teacher often needs to write on blackboard, draw and explain, in a class of 45～50 minutes, will erasable several, following class hour is often on hand, on the sleeve, even all stay one deck white chalk dust on the hair, shoulder, like this everyday, year after year, work after 20～30 years, worn down ten hundreds of chalks.The teacher is when writing blackboard, and hand directly contacts chalk, all speckles with chalk dust on hand for a long time, and health is had certain influence.

The shortcoming of prior art is: the teacher directly holds chalk version book, speckles with chalk dust on hand for a long time, and teacher's health is had certain influence.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of and can avoids the teacher directly to hold the dustproof chalk that chalk is write.

The technical solution of the utility model is as follows: include the shaft of a writing brush and nib, in the described shaft of a writing brush, be provided with the powder pen core tube, in this powder pen core tube, be equiped with chalk, described powder pen core tube lower end is funnel-form, be connected with in the lower end of described powder pen core tube and lead ledge for chalk on blackboard, this leads the chalk outlet of the corresponding described nib of ledge for chalk on blackboard, like this by the installing of the powder pen core tube in shaft of a writing brush chalk, chalk is emerged from nib, the teacher is when writing, just can avoid directly contacting chalk, reduce the possibility speckle with chalk dust on hand, teacher's health is had certain benefit.

The transmission circle that in the described shaft of a writing brush, also is provided with fixed head and can rotates around fixed head, one side of the described transmission circle chalk interior with leading ledge for chalk on blackboard contacts, can drive the rising or the test of chalk thus by rotation transmission circle, make the teacher more convenient when in use.

The outer surface of described transmission circle is provided with oblique screw thread, the described shaft of a writing brush is provided with opening at the position corresponding with the transmission circle, go out to be equiped with drive at this opening, the oblique threaded engagement of described drive and transmission circle outer surface, drive the rotation of turning collar like this by drive, the teacher can regulate the length that chalk is stayed the nib outside very fast when writing, have effect easy to use and that save chalk.

Offer sulculus in the described shaft of a writing brush, described fixed head inserts this sulculus, by such being provided with in the fixed head stator shaft of a writing brush, has guaranteed this dustproof chalk stability in use, phenomenons such as disconnected pen, the pen that contracts can not occur.

The beneficial effects of the utility model are: the utility model is rational in infrastructure, make simply, effectively having solved traditional chalk needs the teacher directly to hold to write, speckle with chalk dust on hand for a long time, the defective that users such as Yi Yinqi teacher are uncomfortable also can be saved chalk simultaneously.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

The specific embodiment

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

A kind of as shown in Figure 1 dustproof chalk, include the shaft of a writing brush 1 and nib 2, in the described shaft of a writing brush, be provided with powder pen core tube 3, in this powder pen core tube 3, be equiped with chalk, described powder pen core tube 3 lower ends are funnel-form, be connected with in the bell mouth of the lower end of described powder pen core tube 3 and lead ledge for chalk on blackboard 4, this leads ledge for chalk on blackboard 4 corresponding described written 2 chalk outlets, the transmission circle 6 that in the described shaft of a writing brush 1, also is provided with fixed head 5 and can rotates around fixed head 5, one side of described transmission circle 6 contacts with chalk in leading ledge for chalk on blackboard 4, the outer surface of described transmission circle 6 is provided with oblique screw thread, and the described shaft of a writing brush 1 is provided with opening at the position corresponding with transmission circle 6, goes out to be equiped with drive 7 at this opening, drive 7 is installed on the shaft of a writing brush through rotating shaft, the oblique threaded engagement of described drive 7 and transmission circle 6 outer surfaces offers sulculus in the described shaft of a writing brush 1, described fixed head 5 inserts these sulculuses.

Although below in conjunction with the accompanying drawings preferred embodiment of the present utility model is described; but the utility model is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic rather than determinate; those of ordinary skill in the art is under enlightenment of the present utility model; under the prerequisite of the utility model aim and claim; can make multiple similar expression; as: the conversion of shaft of a writing brush shape, such conversion such as the conversion of fixed head and shaft of a writing brush internal fixation mode all falls within the protection domain of the present utility model.

Claims

1. dustproof chalk, it is characterized in that: include the shaft of a writing brush (1) and nib (2), in the described shaft of a writing brush, be provided with powder pen core tube (3), in this powder pen core tube (3), be equiped with chalk, described powder pen core tube (3) lower end is funnel-form, be connected with in the lower end of described powder pen core tube (3) and lead ledge for chalk on blackboard (4), this leads the chalk outlet of the corresponding described nib of ledge for chalk on blackboard (4) (2).

2. according to the described dustproof chalk of claim 1, it is characterized in that: the transmission circle (6) that also is provided with fixed head (5) and can rotates around fixed head (5) in the described shaft of a writing brush (1), a side of described transmission circle (6) chalk interior with leading ledge for chalk on blackboard (4) contacts.

3. according to the described dustproof chalk of claim 2, it is characterized in that: the outer surface of described transmission circle (6) is provided with oblique screw thread, the described shaft of a writing brush (1) is provided with opening at the position corresponding with transmission circle (6), go out to be equiped with drive (7) at this opening, the oblique threaded engagement of described drive (7) and transmission circle (6) outer surface.

4. according to claim 1 or 2 described dustproof chalks, it is characterized in that: offer sulculus in the described shaft of a writing brush (1), described fixed head (5) inserts this sulculus.