CN205185643U - Chalk sleeve - Google Patents

Abstract

The utility model discloses a chalk sleeve, its structure includes sleeve, clamping piece, snap ring and push rod, the sleeve is cylindric structure, telescopic front end is equipped with the clamping piece, the clamping piece is circular structure's lengthy motion picture column structure, the clamping piece is equipped with a plurality ofly, a plurality of clamping piece circumference distribute telescopic front end, the periphery of a plurality of clamping pieces is equipped with the annular snap ring of circle, telescopic rear end is equipped with the push rod, the push rod is the screw rod column structure, the structrual installation that the push rod passes through the screw thread is in telescopic rear end, the push rod can precession in the sleeve. The beneficial effects of the utility model are that: the chalk clip that the clamping piece can will be put in the endotheca lives, and the push rod can continue the chalk forward propulsion in the sleeve to use, and the effect of snap ring makes the chalk clip that the clamping piece can will be put in the sleeve hold, so telescopic effect also is that the position of holding can prevent chalk dust pollution hand simultaneously.

Description

Chalk sleeve

Technical field

The utility model relates to a kind of chalk sleeve, particularly relates to a kind of chalk sleeve.

Background technology

The method of the chalk of traditional use be directly chalk is hand held in, the shortcoming of this use chalk method is: 1, and chalk directly contacts with hand and chalk dust can be caused to pollute hand; 2, chalk use certain length to shorten when cannot hold with hand to be so residual chalk end that cannot re-use be a kind of waste.

Utility model content

Problem to be solved in the utility model is to provide a kind of chalk sleeve, its smart structural design, can make full use of chalk dust can't be caused to pollute hand to chalk.

In order to overcome the above problems, the technical solution of the utility model is as follows:

A kind of chalk sleeve, its structure comprises sleeve, intermediate plate, snap ring and push rod; Described sleeve structure cylindrically, the front end of described sleeve is provided with intermediate plate, and described intermediate plate is the long laminated structure of arc structure, and described intermediate plate is provided with multiple, and described multiple intermediate plate circle distribution is in the front end of described sleeve; The outer of described multiple intermediate plate is arranged with circular snap ring; The rear end of described sleeve is provided with push rod, and described push rod is screw shaped structure, and described push rod passes through the structure installment of screw thread in the rear end of described sleeve, and described push rod can precession in described sleeve.

Described snap ring can move axially by relatively described intermediate plate.

The beneficial effects of the utility model are: the chalk be placed in inner sleeve can be clamped by intermediate plate, chalk in sleeve can be pushed ahead and be continued to use by push rod, the effect of snap ring is that the chalk be placed in sleeve can be clamped by intermediate plate, and the effect of sleeve is also that the position held is so can prevent chalk dust from polluting hand simultaneously.

Accompanying drawing explanation

Fig. 1 is the overall structure schematic diagram of the utility model embodiment.

Fig. 2 is the structural representation after Fig. 1 removes push rod.

Fig. 3 is the structural representation of push rod.

Schematic diagram when Fig. 4 is the utility model embodiment clamping chalk.

Detailed description of the invention

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

As shown in Figures 1 to 4, its structure of the utility model comprises sleeve 1, intermediate plate 2, snap ring 3 and push rod 4; Sleeve 1 structure cylindrically, the front end of sleeve 1 is provided with intermediate plate 2, the long laminated structure of intermediate plate 2 in arc structure, and intermediate plate 2 is provided with multiple, and multiple intermediate plate 2 circle distribution is in the front end of sleeve 1; The outer of multiple intermediate plate 2 is arranged with circular snap ring 3; The rear end of sleeve 1 is provided with push rod 4, and push rod 4 is in screw shaped structure, and push rod 4 passes through the structure installment of screw thread in the rear end of sleeve 1, and push rod 4 can precession in sleeve 1.

Snap ring 3 can move axially by opposing clip 2.

The utility model uses like this: be placed on by chalk 5 between multiple intermediate plate 2 and then move forward snap ring 3 until chalk grips by intermediate plate 2.Grasp and just can write letter written with chalk on sleeve.Chalk 5 in sleeve 1 pushed ahead one section and then snap ring is moved forward certain position until chalk grips by intermediate plate again when chalk 5 to expose after the part of intermediate plate 2 front end runs out of precession push rod 3, then continue to use.

Claims (1)

1. a chalk sleeve, its structure comprises sleeve, intermediate plate, snap ring and push rod; It is characterized in that: described sleeve structure cylindrically, the front end of described sleeve is provided with intermediate plate, and described intermediate plate is the long laminated structure of arc structure, and described intermediate plate is provided with multiple, and described multiple intermediate plate circle distribution is in the front end of described sleeve; The outer of described multiple intermediate plate is arranged with circular snap ring; The rear end of described sleeve is provided with push rod, and described push rod is screw shaped structure, and described push rod passes through the structure installment of screw thread in the rear end of described sleeve, and described push rod can precession in described sleeve.