CN207670051U

CN207670051U - The flexible not easily broken chalk of one kind

Info

Publication number: CN207670051U
Application number: CN201720962887.1U
Authority: CN
Inventors: 周春曼
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-08-03
Filing date: 2017-08-03
Publication date: 2018-07-31
Anticipated expiration: 2027-08-03

Abstract

The utility model discloses the flexible not easily broken chalk of one kind, including chalk ontology, bush of chalk and screw thread pushing ram, bush of chalk is that round table-like and upper and lower ends are open, which is arranged flexible leather packing, and chalk ontology is assemblied in bush of chalk；Bush of chalk upper port edge is hinged with sealing cover, and thread barrel is provided on sealing cover, which is provided with pushing plate, and screw thread pushing ram upper end is provided with lever；Sealing cover is fixedly connected with limiting plate on outer, open hole on limiting plate, the corresponding position of bush of chalk outer wall are provided with convex block, and the utility model can realize that the telescopic length of the pencil of chalk ontology is adjusted, flexible leather packing is set in bush of chalk, good cushioning effect can be played to chalk ontology forced section on writing, it is made to be not easily broken, it being capable of effectively save chalk, global design practicality simple for structure, easy to operate, cost is relatively low, convenient for promoting.

Description

The flexible not easily broken chalk of one kind

Technical field

The utility model is related to realia field, specially a kind of not easily broken chalk that stretches.

Background technology

Chalk is tool widely used in teaching, is for general on blackboard and writes, the chalk in ancient times is usually used Natural chalk is made, but is mostly used other substance substitutions now, and the ingredient of chalk is a kind of white depositions of calcium sulfate, no Be easy to be decomposed, particle is bigger than dust, at present the teacher of many schools be all when using chalk it is direct grasp chalk ontology into Running hand is write, and such one is the chalk dust for being easy to be stained with full palm, will make clothing dirty unless you give your whole attention to it；Second is that chalk starts just Length is longer when writing, and when writing, which be easy to cause, to fracture；Third, when chalk use to short length, it is not easy to grasp, often Often all it is to be abandoned to cause to waste.

Utility model content

The problem of for background technology, the utility model provide a kind of not easily broken chalk that stretches.

To achieve the above object, the utility model provides the following technical solutions：The flexible not easily broken chalk of one kind, including chalk Ontology, bush of chalk and screw thread pushing ram, the bush of chalk are that round table-like and upper and lower ends are open, which sets It is equipped with elastic leather packing, the chalk ontology is assemblied in bush of chalk；Bush of chalk upper port edge is hinged with sealing cover, It is provided with thread barrel on the sealing cover, the screw thread pushing ram spiral shell and in thread barrel, which is provided with Pushing plate, the pushing plate are round and are close to chalk ontology upper surface that screw thread pushing ram upper end is provided with lever； It is fixedly connected with limiting plate on the sealing cover outer, through-hole is provided on the limiting plate, the bush of chalk outer wall is corresponding Position be provided with convex block, the convex block matches with through-hole.

The utility model makes it let droop by the way that chalk ontology to be assemblied in bush of chalk, by rotating screw thread pushing bar To movement, the chalk ontology being assemblied in bush of chalk can be pressed down on by pushing plate, be the head of chalk ontology Portion exposes from bush of chalk, and writing on the blackboard is carried out by the chalk ontology of exposing；It is needed replacing after a section chalk ontology is finished When, by the way that the upward spiral of screw thread pushing ram to pushing plate is close to sealing cover, opens sealing cover and assembling new chalk ontology In bush of chalk, then close sealing cover, by limiting plate through-hole on bush of chalk outer wall convex block card and realize it is close The fixation of capping.

As a kind of preferred technical solution of the utility model, the elasticity leather packing is made of rubber material.

As a kind of preferred technical solution of the utility model, the lever and screw thread pushing ram are perpendicular, and operate It is enclosed with Anti-slip cover on handle, indentation is carved on the Anti-slip cover.

As a kind of preferred technical solution of the utility model, the thread barrel is located at sealing cover center, the screw thread The height of cylinder is 1-1.5cm.

As a kind of preferred technical solution of the utility model, link is set on the lever.

As a kind of preferred technical solution of the utility model, the bush of chalk is all made of aluminum or modeling with sealing cover Material material is made.

Compared with prior art, the utility model has the beneficial effects that：The utility model global design can realize chalk The telescopic length of the pencil of ontology is adjusted, and flexible leather packing is arranged in bush of chalk, can be on writing to chalk ontology Forced section plays good cushioning effect, it is made to be not easily broken, can effectively save chalk, global design practicality simple for structure, Easy to operate, cost is relatively low, has more vast market prospect, convenient for promoting.

Description of the drawings

Fig. 1 is the utility model overall structure diagram；

Fig. 2 is the utility model sealing cover structure schematic diagram；

In figure：1- chalk ontologies；2- bush of chalk；3- screw thread pushing rams；4- elasticity leather packings；5- sealing covers；6- thread barrels； 7- pushing plates；8- levers；9- limiting plates；10- through-holes；11- convex blocks；12- Anti-slip covers；13- indentations；14- links.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work The every other embodiment obtained, shall fall within the protection scope of the present invention.

Embodiment：

It please refers to Fig.1 and Fig. 2, the utility model provides a kind of technical solution：The flexible not easily broken chalk of one kind, including chalk Ontology 1, bush of chalk 2 and screw thread pushing ram 3, the bush of chalk 2 are that round table-like and upper and lower ends are open, the bush of chalk 2 Flexible leather packing 4 is arranged in inner wall, and the chalk ontology 1 is assemblied in bush of chalk 2；It cuts with scissors at 2 upper port edge of the bush of chalk It is connected to sealing cover 5, is provided with thread barrel 6 on the sealing cover 5,3 spiral shell of screw thread pushing ram and in thread barrel 6, the screw thread 3 lower end of pushing ram is provided with pushing plate 7, and the pushing plate 7 is round and is close to 1 upper surface of chalk ontology that the screw thread pushes away 3 upper end of bar is provided with lever 8；It is fixedly connected with limiting plate 9 on 5 outer of the sealing cover, is provided on the limiting plate 9 logical Hole 10, the corresponding position of 2 outer wall of the bush of chalk are provided with convex block 11, and the convex block 11 matches with through-hole 10.

Utility model works principle：The utility model is by the way that chalk ontology 1 to be assemblied in bush of chalk 2, by turning Dynamic screw thread, which pushes bar 3, makes its vertical movement downwards, by pushing plate 7 can by the chalk ontology 1 being assemblied in bush of chalk 2 into Row presses down on, and is that the head of chalk ontology 1 is exposed from bush of chalk 2, and writing on the blackboard is carried out by the chalk ontology 1 of exposing；When When one section chalk ontology 1 needs replacing after being finished, by the way that 3 upward spiral of screw thread pushing ram to pushing plate 7 is close to sealing cover 5, it opens sealing cover 5 and is assembling new chalk ontology 1 in bush of chalk 2, then close sealing cover 5, it will be on limiting plate 9 The fixation of through-hole 10 and the card of convex block 11 and realization sealing cover 5 on 2 outer wall of bush of chalk.

Specifically, the elasticity leather packing 4 is made of rubber material.

Specifically, the lever 8 and screw thread pushing ram 3 are perpendicular, and Anti-slip cover 12 is enclosed on lever 8, it is described It is carved with indentation 13 on Anti-slip cover 12, plays anti-skidding effect.

Specifically, the thread barrel 6 is located at 5 center of sealing cover, the height of the thread barrel 6 is 1-1.5cm.

Specifically, link 14 is set on the lever 8, convenient for suspension.

Specifically, the bush of chalk 2 is all made of aluminum with sealing cover 5 or plastic material is made.

Based on above-mentioned, the utility model has the advantage that：The utility model global design can realize chalk ontology Pencil telescopic length adjust, flexible leather packing is set in bush of chalk, can write on to chalk ontology stress Good cushioning effect is played in portion, it is made to be not easily broken, can effectively save chalk, global design practicality simple for structure, operation Convenient, cost is relatively low, has more vast market prospect, convenient for promoting.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model Protection domain within.

Claims

The not easily broken chalk 1. one kind is stretched, it is characterised in that：Including chalk ontology (1), bush of chalk (2) and screw thread pushing ram (3), the bush of chalk (2) is that round table-like and upper and lower ends are open, which is arranged flexible leather packing (4), The chalk ontology (1) is assemblied in bush of chalk (2)；Bush of chalk (2) the upper port edge is hinged with sealing cover (5), Thread barrel (6), screw thread pushing ram (3) spiral shell and, screw thread propulsion interior in thread barrel (6) are provided on the sealing cover (5) Bar (3) lower end is provided with pushing plate (7), and the pushing plate (7) is round and is close to chalk ontology (1) upper surface, the spiral shell Line pushing ram (3) upper end is provided with lever (8)；Sealing cover (5) outer is fixedly connected with limiting plate (9), the limit Through-hole (10) is provided on plate (9), the corresponding position of bush of chalk (2) outer wall is provided with convex block (11), the convex block (11) match with through-hole (10).
2. a kind of not easily broken chalk that stretches according to claim 1, it is characterised in that：The elasticity leather packing (4) uses rubber Glue material matter is made.
3. a kind of not easily broken chalk that stretches according to claim 1, it is characterised in that：The lever (8) pushes away with screw thread It is perpendicular into bar (3), and Anti-slip cover (12) is enclosed on lever (8), it is carved with indentation (13) on the Anti-slip cover (12).
4. a kind of not easily broken chalk that stretches according to claim 1, it is characterised in that：The thread barrel (6) is located at sealing (5) center is covered, the height of the thread barrel (6) is 1-1.5cm.
5. a kind of not easily broken chalk that stretches according to claim 1, it is characterised in that：It is set on the lever (8) Link (14).
6. a kind of not easily broken chalk that stretches according to claim 1, it is characterised in that：The bush of chalk (2) and sealing Lid (5) is all made of aluminum or plastic material is made.