CN202319433U

CN202319433U - Buckling type automatic chalk ejection sleeve

Info

Publication number: CN202319433U
Application number: CN201120463037XU
Authority: CN
Inventors: 董咪
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-21
Filing date: 2011-11-21
Publication date: 2012-07-11
Anticipated expiration: 2021-11-21

Abstract

The utility model provides a buckling type automatic chalk ejection sleeve, belonging to a teaching aid. The structure comprises an upper chalk body and a lower chalk body, wherein the upper chalk body and the lower chalk body are buckled and fixed via a buckle, and corresponding hand-protecting bulges are arranged at the lower parts of the lower chalk body and the upper chalk body; a slide way is arranged on the upper chalk body, and both side edges of the slide way are provided with ratchets; and a chalk fixing sleeve is slidably fixed in the slide way, and pawls matched with the ratchets are arranged on the chalk fixing sleeve. Compared with the prior art, the novel buckling type automatic chalk ejection sleeve has the characteristics of reasonable design, simple structure, convenience for use and the like, the entire use process is simple and convenient, the length of a chalk is easy to adjust, and the buckling type automatic chalk ejection sleeve has good popularization and use values.

Description

Buckle-type ejects chalk sleeve automatically

Technical field

The utility model relates to a kind of teaching aid, a kind of specifically can be simple in structure, the buckle-type chalk sleeve of automatic ejection.

Background technology

As everyone knows, though multimedia has spread to a lot of places to operate schools, the teaching method that is to use chalk on blackboard, to write is still very general, because it is the most ancient, the most easy teaching method.The composition of chalk is a kind of white depositions of calcium sulfate, is not easy to decompose, and particle is bigger than dust.The teacher is when utilizing chalk to write writing on the blackboard, and finger directly contacts chalk, the chalk finger of not only making dirty easily, and finger skin caused damage.Though the utensil of protection finger such as many for example chalk sleeves occurred now, had shortcomings such as complex structure, complex operation, cost of manufacture height mostly.

Summary of the invention

The technical assignment of the utility model is the deficiency that solves prior art, and a kind of buckle-type chalk sleeve that can practice thrift chalk, eject automatically is provided.

The technical scheme of the utility model realizes that by following mode this buckle-type ejects chalk sleeve automatically, and its structure comprises handwriting, lower pen body; Said going up between handwriting, the lower pen body is fastened through buckle; Be provided with corresponding handguard in the bottom of last handwriting, lower pen body protruding, and said going up on the handwriting has slideway, and the slideway both sides of the edge are provided with ratchet; The chalk fixed cover slides and is fixed in the slideway, and the chalk fixed cover is provided with the ratchet that matches with ratchet.

Said chalk fixed cover upper surface also is provided with and pushes away handle.

Curved shell fragment in the said front end of going up handwriting, lower pen body is provided with.

The beneficial effect that the utility model is compared with prior art produced is:

The buckle-type of the utility model ejects chalk sleeve automatically and has simple in structure, easy to use, characteristics such as be skillfully constructed, and said chalk sleeve adopts the structure of ratchet and ratchet, through pushing away the length of handle adjusting chalk; Last handwriting, lower pen body are provided with the handguard convexity, effectively protect teacher's hand, avoid hand directly to contact with chalk; The handwriting structure of the utility model is easy to dismounting, is easy to control, practices thrift chalk; And chalk is difficult for dropping and loses, and is cheap for manufacturing cost, is easy to promote the use of.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model;

Accompanying drawing 2 is cross-sectional view of the utility model.

Mark in the accompanying drawing is represented respectively:

1, pushes away handle, 2, slideway, 3, go up handwriting, 4, chalk, 5, lower pen body, 6, handguard is protruding, 7, the chalk fixed cover, 8, buckle, 9, ratchet, 10, ratchet, 11, shell fragment.

The specific embodiment

Specify below below in conjunction with accompanying drawing the buckle-type of the utility model being ejected the chalk interplanting automatically.

Like accompanying drawing 1, shown in Figure 2; This buckle-type ejects chalk sleeve automatically, and its structure comprises handwriting 3, lower pen body 5, and said going up between handwriting 3, the lower pen body 5 is fastened through buckle 8; Be provided with corresponding handguard protruding 6 in the bottom of last handwriting 3, lower pen body 5; This handguard protruding 6 can avoid teacher's hand directly to contact with chalk 4, and said going up on the handwriting 3 has slideway 2, and slideway 2 both sides of the edge are provided with ratchet 10; Chalk 4 fixed covers slide and are fixed in the slideway 2, and chalk fixed cover 7 is provided with the ratchet 9 that matches with ratchet 10.

Said chalk fixed cover 7 upper surfaces also are provided with and push away handle 1.

Curved shell fragment 11 in the said front end of going up handwriting 3, lower pen body 5 is provided with.

To go up handwriting 3 when in use, lower pen body 5 is taken apart, and chalk 4 is placed in the chalk fixed cover 7, handwriting 3, lower pen body 5 can use on the fastening; Ratchet 10 and ratchet 9 cooperatively interact and promote chalk 4 and move ahead during use; Be easy to control the length of chalk 4, thereby reach the purpose of practicing thrift chalk 4, the fixing chalk 4 of the utility model is difficult for dropping and loses; And it is cheap for manufacturing cost, is easy to promote the use of.

Claims

1. buckle-type ejects chalk sleeve automatically; It is characterized in that its structure comprises handwriting, lower pen body, said going up between handwriting, the lower pen body is fastened through buckle, and be provided with corresponding handguard in the bottom of last handwriting, lower pen body protruding; Said going up on the handwriting has slideway; The slideway both sides of the edge are provided with ratchet, and the chalk fixed cover slides and is fixed in the slideway, and the chalk fixed cover is provided with the ratchet that matches with ratchet.

2. buckle-type according to claim 1 ejects chalk sleeve automatically, it is characterized in that said chalk fixed cover upper surface also is provided with to push away handle.

3. buckle-type according to claim 1 ejects chalk sleeve automatically, it is characterized in that the said front end of going up handwriting, lower pen body is provided with interior curved shell fragment.