CN201366869Y

CN201366869Y - Chalk sleeve without sticking hands

Info

Publication number: CN201366869Y
Application number: CNU200920129557XU
Authority: CN
Inventors: 谭颖彤; 万飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-19
Filing date: 2009-01-19
Publication date: 2009-12-23
Anticipated expiration: 2019-01-19

Abstract

The utility model provides a chalk sleeve without sticking hands, belonging to the field of a teaching apparatus. At present, teachers in schools write on blackboards with chalks; chalk dust is usually stuck on the hands, which is neither comfortable nor sanitary. The chalk sleeve comprises a screw cap, a screw rod, the chalk sleeve and a movable elastic hoop. The screw cap and the screw rod are connected into one body, an internal thread is designed on the inner wall near the upper end of the chalk sleeve, the screw rod and the chalk sleeve are assembled together by being connected in a threaded manner, 2 to 4 elastic grooves are designed on the chalk sleeve near the lower end part, an external thread is designed on the outer surface of the chalk sleeve near the lower end part, another internal thread is designed on the inner wall of the movable elastic hoop, and the movable elastic hoop and the chalk sleeve are assembled together by being connected in a threaded manner. At the part of the chalk sleeve designed with the elastic grooves, the wall thickness near the end part of the chalk sleeve is larger than that near the middle part of the chalk sleeve, the axial profile of the part of the chalk sleeve designed with the elastic grooves presents the shape of a slope, and anti-slip veins are designed on the outer surfaces of the chalk sleeve and the movable elastic hoop. The chalk sleeve is used to clamp a chalk for the teachers to write on the blackboards.

Description

Tack-free chalk sleeve

Technical field

The utility model relates to the teaching equipment field, particularly relates to a kind of tack-free chalk sleeve.

Background technology

Now, the teachers ' teaching task of school is generally heavier, and the teacher will hold chalk every day and write on blackboard, usually sticks chalk dust on hand, and is both uncomfortable also unhygienic, influences a model for others image of teacher, and teacher healthy had certain influence.Therefore, people wish that urgently a kind of tack-free chalk sleeve comes out, and make the teacher reduce the chance of contact chalk dust, reduce the harm of chalk dust to teacher's health, establish a model for others image of teacher better.

The utility model content

Technical problem to be solved in the utility model is, satisfy people's hope, a kind of tack-free chalk sleeve is provided, use this tack-free chalk sleeve clamping chalk on blackboard, to write, can make the teacher reduce the chance of contact chalk dust, reduce the harm of chalk dust, establish a model for others image of teacher better teacher's health.

The technical scheme that its technical problem that solves the utility model adopts is: tack-free chalk sleeve, comprise nut, the screw rod and the pen cap, nut and screw rod are connected as a single entity, lean on the inwall design of upper end that internal thread is arranged at the pen cap, the screw rod and the pen cap are assembled together by thread connecting mode, it is characterized in that: also comprise an activity degree of tightness hoop, near design on the pen cap of bottom 2～4 degree of tightness grooves are being arranged, in the pen cap outer surface design external screw thread is arranged near the bottom, in the design of activity degree of tightness hoop inwall internal thread is arranged, the activity degree of tightness hoop and the pen cap are assembled together by thread connecting mode.

In technique scheme, in design the pen cap position of degree of tightness groove is arranged, greater than the wall thickness dimension near pen cap middle part, design has the pen cap position axial section appearance of degree of tightness groove to be ramp shaped near the wall thickness dimension of pen cap end.

In the design of pen cap outer surface anti-skidding line is arranged.

In the design of activity degree of tightness hoop outer surface anti-skidding line is arranged.

The beneficial effects of the utility model are: the tack-free chalk sleeve that adopts said structure and shape, by rotating screw cap and adjusting activity degree of tightness hoop, just can as required chalk be clamped in the chalk sleeve, or when writing, as required chalk is released, use this tack-free chalk sleeve clamping chalk on blackboard, to write, can make the teacher reduce the chance of contact chalk dust, reduce the harm of chalk dust, establish a model for others image of teacher better teacher's health.

Description of drawings

Fig. 1 is the perspective view of the utility model when the clamping chalk;

Fig. 2 is an axial cutaway view of the present utility model;

Fig. 3 is a left view of the present utility model.

Among the figure, 1, nut; 2, screw rod; 3, the pen cap; 4, anti-skidding line; 5, activity degree of tightness hoop; 6, degree of tightness groove; 7, chalk.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Referring to Fig. 1, Fig. 2 and Fig. 3, the described a kind of tack-free chalk sleeve of present embodiment, comprise nut 1, the screw rod 2 and the pen cap 3, nut 1 and screw rod 2 are connected as a single entity, lean on the inwall design of upper end that internal thread is arranged at the pen cap 3, screw rod 2 and the pen cap 3 are assembled together by thread connecting mode, this structure helps as required chalk 7 being released from chalk sleeve, it is characterized in that: also comprise an activity degree of tightness hoop 5, near design on the pen cap 3 of bottom 4 degree of tightness grooves 6 are being arranged, in that design has external screw thread near the pen cap 3 outer surfaces of bottom, in the design of activity degree of tightness hoop 5 inwalls internal thread is arranged, activity degree of tightness hoop 5 and the pen cap 3 are assembled together by thread connecting mode; The pen cap 3 positions that degree of tightness groove 6 is arranged in design, the wall thickness dimension of the close pen cap 3 ends is greater than the wall thickness dimension near the pen cap 3 middle parts, design has the pen cap 3 position axial section appearances of degree of tightness groove 6 to be ramp shaped, and this structure helps when adjusting activity degree of tightness hoop 5 chalk 7 being clamped; In the design of the pen cap 3 outer surfaces anti-skidding line 4 is arranged, play anti-skidding effect when being used to use tack-free chalk sleeve clamping chalk 7 on blackboard, to write; In the design of activity degree of tightness hoop 5 outer surfaces anti-skidding line is arranged, play anti-skidding effect when being used for adjusting activity degree of tightness hoop 5.

Above-described only is a preferred implementation of the present utility model.What deserves to be explained is; for one of ordinary skill in the art; under the prerequisite that does not break away from the utility model principle; can also make some distortion and improvement to the utility model; for example: having 2～4 degree of tightness grooves 6 or the like, these features to belong to the scope of the utility model patent application protection equally near design on the pen cap 3 of bottom.

Claims

1, tack-free chalk sleeve, comprise nut (1), the screw rod (2) and the pen cap (3), nut (1) and screw rod (2) are connected as a single entity, lean on the inwall design of upper end that internal thread is arranged at the pen cap (3), screw rod (2) is assembled together by thread connecting mode with the pen cap (3), it is characterized in that: also comprise an activity degree of tightness hoop (5), go up design at the pen cap (3) of close bottom 2～4 degree of tightness grooves (6) are arranged, in the pen cap (3) outer surface design external screw thread is arranged near the bottom, in the design of activity degree of tightness hoop (5) inwall internal thread is arranged, activity degree of tightness hoop (5) is assembled together by thread connecting mode with the pen cap (3).

2, tack-free chalk sleeve according to claim 1, it is characterized in that: the pen cap (3) position that degree of tightness groove (6) are arranged in design, the wall thickness dimension of the close pen cap (3) end is greater than the wall thickness dimension near the pen cap (3) middle part, and design has the pen cap (3) the position axial section appearance of degree of tightness groove (6) to be ramp shaped.

3, tack-free chalk sleeve according to claim 1 is characterized in that: in the design of the pen cap (3) outer surface anti-skidding line (4) is arranged.

4, tack-free chalk sleeve according to claim 1 is characterized in that: in the design of activity degree of tightness hoop (5) outer surface anti-skidding line is arranged.