CN2822983Y - Environmental protection type chalk - Google Patents

Abstract

The utility model discloses an environmental protection type chalk, which comprises a chalk core and a chalk casing, wherein the chalk core is denatured to be a solid chalk by using chalk liquid and the goal of reducing chalk dust is achieved. The chalk core is arranged on the special chalk casing, and pollution of hands is reduced. The utility model has the advantages of safe use and sanitary use, and achieves the effect of environmental protection.

Description

A kind of environmental protection chalk

Technical field

The utility model relates to a kind of chalk, especially a kind of environmental protection chalk.

Background technology

Chalk is that the teacher teaches knowledge, student's necessary tool that absorbs knowledge.Can produce dust at traditional chalk, chafe, shortcoming such as unhygienic and fracture has easily had a lot of people that traditional chalk is improved.Improve and mainly concentrate on the dust that reduces chalk and use chalk sleeve.For the dust aspect that reduces chalk, the someone has proposed chalk is configured to liquid form, the chalk of this liquid form is recorded the improvement project of using in pen.

Though this chalk can reach the purpose that reduces dust, its shortcoming is this chalk can in handwriting the time, is subjected to the restriction of pen core thickness, and general this pen core is the thickest to be 5 millimeters, and when writing, the student who arranges behind the classroom seems more painstaking.

And use the technical scheme of chalk sleeve to be mostly common chalk is installed on the chalk sleeve, and can only separate and never pollute user's hand, reduce the problem of chafe, can not solve the problem of eliminating dust.

The utility model content

The purpose of this utility model is at the deficiencies in the prior art, proposed a kind of novel environment friendly chalk, comprised Chalk casing and chalk core two parts, wherein the chalk core is that the sex change of liquid chalk liquid is become the solid chalk, this chalk core can be installed in the special-purpose Chalk casing, constitutes environmental protection chalk of the present utility model.

The advantage of the utility model environmental protection chalk is two aspects: 1. the chalk core is formed by the sex change of liquid chalk liquid, greatly reduces the generation of dust, and writing is clear when writing simultaneously.2. the chalk core is installed on the special-purpose Chalk casing, further reduces adversary's pollution, uses safety and sanitation.

The utility model environmental protection chalk can use on common ground glass blackboard, and person's handwriting can be wiped with wet cloth, and writes also unaffected, very easy to use under the situation of blackboard humidity.

For achieving the above object, the utility model adopts following technical scheme:

One, the manufacturing of chalk core:

Raw material is mixed by following percentage by weight: 5 parts of titanium dioxides, 18 parts of powdered whitings, 15 parts of land plasters, 2 parts in dextrin, an amount of water fully stirs after being mixed into pasty state, sends into extruder after stirring, and extrusion molding blocks the length that becomes to need.

After this chalk core is shaped to be shaped as diameter bar-shaped uniformly.Chalk core after the shaping adopts the packing method of similar boxlike cigarette, is convenient to the teacher and carries.

Two, the assembling of environmental protection chalk:

The chalk core of said method production is installed in the special-purpose Chalk casing of the present utility model.Special-purpose Chalk casing of the present utility model is by the cap for brush, handwriting, adjust body, the pen core seat, form with blanking cover five parts, establish screw thread in the handwriting, so that it is flexible to drive the pen core seat when body is adjusted in rotation, pen core seat tail end has the both sides projection, just in time embed in the screw thread of handwriting inboard, and can in screw thread, slide freely, pen core seat middle part is a square column, just embed and adjust in the body, adjusting the body inboard is rectangle, the square column of pen core seat just in time can enter wherein and freely slides, and adjusts body and drives the motion of pen core seat when rotated, thereby realize advancing and retreating of pen core seat.

Chalk core with preceding method production during use is installed on pen core seat front end, and advancing and retreating of pen core seat just realized stretching out and retraction of chalk core.

The special-purpose Chalk casing deft design of the utility model, rational in infrastructure simple, adopt good engineering plastics manufacturing, lightly durable, sanitation and hygiene.Its design feature is that hand does not directly contact the chalk core when using environmental protection chalk, can freely adjust the length of environmental protection chalk core, makes its not frangibility, and has reduced the length of chalk head greatly, and it is convenient, easy to carry to change.

Chalk core of the present utility model and the supporting use of special-purpose Chalk casing have significantly reduced the generation of dust, and health safe in utilization reaches the effect of environmental protection.

Description of drawings:

Fig. 1: environmental protection chalk outward appearance perspective view

Fig. 2: cap for brush perspective view

Fig. 3: handwriting perspective view

Fig. 4: blanking cover perspective view

Fig. 5: adjust the body perspective view

Fig. 6: pen core seat perspective view

Fig. 7: pen core seat longitudinal sectional drawing

Fig. 8: pen core seat left view

Fig. 9: handwriting longitudinal sectional drawing

Figure 10: adjust the body longitudinal sectional drawing

Figure 11: adjust the body left view

Figure 12: environmental protection chalk installation diagram

The specific embodiment

The structure of environmental protection chalk:

Environmental protection chalk 1 of the present utility model has following structure: mainly be made up of the cap for brush 2, handwriting 3, adjustment body 4, pen core seat 5 and blanking cover 7 five parts, the outward appearance perspective view of each parts is shown in Fig. 1-6.Establish screw thread in the handwriting 3, so that it is flexible to drive pen core seat 5 when body 4 is adjusted in rotation: the tail end of pen core seat 5 has both sides projection 51 (as shown in Figure 7), just in time embed in the screw thread of handwriting 3 inboards, and can in screw thread, slide freely, the middle part of pen core seat 5 is square column 52 (as shown in Figure 8), just embed and adjust in the body 4, the inboard of adjusting body 4 is rectangle 41 (as shown in figure 11), the square column 52 of pen core seat 5 just in time can enter wherein and freely and slide, adjust body 4 and drive 5 motions of pen core seat when rotated, thereby realize advancing and retreating of pen core seat 5.Environmental protection chalk core 6 is installed on pen core seat 5 front ends, and the front end of pen core seat 5 has an opening 53, as Fig. 7, shown in 8, so that chalk core 6 is installed easily, just advancing and retreating of pen core seat 5 realized stretching out and retraction of environmental protection chalk core 6.

The manufacturing of chalk core:

Raw material adopts rutile type titanium white 5 grams, powdered whiting 18 grams, land plaster 15 grams, dextrin 2 grams, water is an amount of, is mixed into pasty state, after above-mentioned mixed raw materials is fully stirred, send into extruder, extrusion molding, and block the length that becomes to need, send into then in the conveyer belt dryer, 170-180 ℃ of oven dry down, be packaged into box at last.

Adopt rutile type titanium white in the foregoing description, in fact can select the titanium dioxide of any model for use according to actual conditions.Selecting for use dextrin as binding agent, is one of characteristics of the present utility model, and the continuous experiment through the inventor proves that dextrin is more satisfactory binding agent.

The installation of environmental protection chalk:

To adjust body 4 during installation earlier and be inserted in handwriting 3 front ends (left side of Fig. 9), again pen core seat 5 from handwriting 3 tail ends (right side of Fig. 9) handwriting of packing into, body 4 is adjusted in rotation makes pen core seat 5 front ends stretch out the adjustment body, blanking cover 7 is contained in the tail end of handwriting 3, environmental protection chalk core 6 is inserted on the pen core seat 5, and body 4 is adjusted in rotation round about again, makes environmental protection chalk core 6 retraction handwritings 3, till can not rotating, cover the cap for brush 2 and get final product.The environmental protection chalk that assembling is finished as shown in Figure 12.

The dismounting of environmental protection chalk:

During dismounting, pull up the cap for brush 2, earlier environmental protection chalk core 6 is launched, again rotation adjust body 4 make pen core seat 5 to handwriting 3 foremost, slightly firmly rotation a bit can eject blanking cover 7 about handwriting 2mm again, take off blanking cover 7, pen core seat 5 is poured out from handwriting 3, final force is extracted from handwriting 3 adjusting body 4, finishes dismounting again.

Claims (4)

1. environmental protection chalk, form by chalk core and Chalk casing two parts, it is characterized in that: Chalk casing is by the cap for brush (2), handwriting (3), adjust body (4), pen core seat (5) and blanking cover (7) five parts are formed, handwriting is established screw thread in (2), so that it is flexible to drive pen core seat (5) when body (4) is adjusted in rotation, pen core seat (5) tail end has the both sides projection, just in time embed in the inboard screw thread of handwriting (2), and can in screw thread, slide freely, pen core seat (5) middle part is square column (52), adjusting the body inboard is rectangle (41), the square column of pen core seat just in time can enter to be adjusted in the body and slides freely, adjust body (4) and drive pen core seat (5) motion when rotated, thereby realize advancing and retreating of pen core seat.

2. environmental protection chalk as claimed in claim 1 is characterized in that: pen core seat front end has an opening (53), with the convenient chalk core of installing.

3. environmental protection chalk as claimed in claim 3 is characterized in that: described chalk core is shaped as bar-shaped uniformly.

4. environmental protection chalk as claimed in claim 3 is characterized in that: described chalk core adopts the packing of boxlike cigarette.

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