CN2187543Y - Sanitary soft chalk with membrane - Google Patents

Abstract

The utility model relates to a sanitary soft chalk with a film, which is mainly composed of a soft chalk and a film. The sanitary soft chalk with a film fills the technical blank that ordinary chalks have no protective devices, and naturally solves the problem of chalk powders fouling hands. The utility model enhances writing comfort and handwriting clearness, reduces breaking rate, increases rate of utilization, and lowers the requirement of storage condition. The sanitary soft chalk with a film also has the function of good health care, is an ideal writing article suitable for teachers to use for every class, and has wide sources of manufacturing materials and low cost.

Description

Sanitary soft chalk with membrane

The utility model is a kind of band film chalk.Common chalk has following shortcoming because there is not the closure hygienic protection: one, a matter mutability, write, wipe inconvenience.Common chalk both can't stop the intrusion of extraneous moisture, also can't preserve self due amount of water.If make moist for a long time, can can't show distinct writing rapidly because of excess moisture when writing, and writing is difficult to wiping, deposit, take equal frangibility and influence use.If long-term overdrying, the due amount of water of chalk self will be evaporated in a large number, makes it too hard again, and a matter deadlock is puckery, writes effort, and noise is big, and because of the powder absorption affinity is strong, wiping needs repeated multiple times, and dust flies upward everywhere, contaminated environment.Two, the dirty hand of powder impairs one's health.When common chalk is write, need directly to grip to be weakly alkaline apparent word material, rub sth. made by twisting a large amount of powder on finger, both unhygienic, the health to long-term user causes recessive harm again.

Consult reference materials, be intended to solve the patented technology 89205147.7 described chalk folders of the dirty hand problem of powder, mainly make according to spring principle.If every chalk configuration one folder, though can produce hand-dirtying-free effect, every chalk needs a spring at least, and the time that the expense of the scrapping life-span of spring and chalk exhaust differs greatly again, if popularize, certainly will cause a large amount of wastes of spring materials such as resources such as iron and steel, plastics.If adopt the mode of several chalk configuration one folders, during use, need again naked chalk to be taken out from packing box again by advancing the chalk folder with methods such as paper bag volume or band gloves, improve the chalk packing method even adopt, be convenient to chalk folder and directly be enclosed within and pick up chalk on the chalk again, still unavoidable a considerable amount of users dislike the program before using loaded down with trivial details, lose time or the not enough and naked chalk of holding of spare unit by advancing the chalk folder or the clear-cut naked chalk of holding is write.In other words, its still can't be extremely naturally solve easily write before, during and after the naked chalk of each link with point the key issue of touching mutually.So this technology has outside the effect of necessarily preventing fractureing except reducing dirty mobile phone meeting of chalk to a certain extent, shortcomings such as, difficult wiping big to a common chalk matter mutability, Yi Qichen, noise still can't overcome.

Show the word material in order to make the writer directly not twist with the fingers to hold, ensure the optimum state that a matter is write effectively, overcome shortcomings such as noise is big, many, easy to break, the difficult wiping of a dirt, the spy is developed into the soft chalk of band film health.

This chalk mainly is made up of film and soft chalk two parts.Its architectural feature is that the outer surface at soft chalk adheres to the last layer film.

Said soft chalk can be to contain amount of water, high quality common chalk that particle is thinner.Also can be on the basis that does not change common chalk materials composition, be standard with the best unification of writing comfort level, manifesting writing perspectivity and intensity three, suitably improves forming at aspects such as materials particle, solid agent, moisture.This particle is thin, moisture increases in right amount, the chalk that solid agent relatively reduces, and it is filled out the grain density that falls into attached to the blackboard exasperate on concavo-convex and strengthens, and the person's handwriting trace face of formation is smooth relatively, and reflection of light rate, refractive index are strengthened, and writing is distinct relatively; Because of its more common chalk moisture increases, the chalk bulk strength dies down again, and hardness diminishes, and particle is loose relatively, and a matter is soft and smooth, write comfortable, and wiping save time, laborsaving, be difficult for dirt.

But soft chalk recited above must combine with film described below, and its every index could effectively realize.This film is closed state, and certain closure is arranged.So it can separate soft chalk and the hand that holds a pen naturally; It can preserve normal an amount of moisture in the soft chalk, avoids it too dry; The intrusion that it can also stop extraneous moisture has to prevent that soft chalk from crossing tide, soft excessively.This film is thinner.It mainly acts on when being to use this kind chalk, and film easily in time grinds off easily or pulls.The coating materials that has is convenient to the color of direct identification chalk because of thin easily transparent.In addition, system film materials self cost is low, because very thin, consumption is few again, saves resource.This film can have certain intensity.Though this film is thin, but because of it is closed state, and the inwall of most films is stained with a certain amount of adhesive that solidifies, again comparatively securely attached to the soft chalk outer surface that certain degree of hardness is arranged, so it had both strengthened the intensity of self, and the bulk strength of this kind chalk is strengthened to some extent.These film materials mostly are daily necessities protection commonly used materials, and the person and chalk self are not all had ill-effect; Have stronger stability, require lower storage condition.This kind is closed state, the health film that certain intensity and stability, time spent be easy in time remove arranged in a word, the various advantages that are fixed in the soft chalk in it have been ensured effectively, make the combination of the two, promptly with all excellent common chalk of every index of the soft chalk of film health.

The characteristics of above-mentioned film and function all are that plain edition film (2) shown in Figure 1 possesses.In addition, this kind chalk also has health shown in Figure 2.Health film (3) except the various characteristics and function that possess plain edition film (2), on the outer surface of different with it is health film (3) with some firm small embossments (4).Use continuously, small embossment (4) can stimulate the finger peripheral nerve, plays a role in health care.The little handle that it can serve as when prolonging non-penetrative and ripping trace (5) and rip or pull striping (3) is unlikely the sticking micro-powder dirt hand down of film (3) inwall; It can increase the frictional force of finger and pen.

Compared with prior art, this chalk has following good effect: it has filled up the technological deficiency that common chalk does not have the closure hygienic protection, makes the writer need directly to twist with the fingers to hold to be weakly alkaline apparent word material, to have solved the dirty hand problem of powder naturally.More common chalk bulk strength strengthens, and has reduced the rate of fractureing, and has improved utilization rate.This technology has ensured the inner due normal moisture of chalk effectively, has improved and has write comfort level, has reduced noise, has been difficult for dirt, easily wiping.The storage condition of this kind chalk requires more common chalk low.Its health also can play the good health care effect.

Fig. 1 is the appearance and the structural representation of the soft chalk of plain edition band film health, and the plain edition film (2) on its right side, lower end is broken away sub-fraction.Film (2) is attached on soft chalk (1) outer surface.Film (2) can grind off naturally writing on the exasperate of normal blackboard.

Fig. 2 is the appearance and the structural representation of the soft chalk of health band film health, and the health film (3) on its right side, lower end is broken away sub-fraction.The health film (3) that has some firm small embossments (4) on the outer surface is attached on the soft chalk (1).The thin end of this root health band film health chalk is opened or is scratched by hard thing mill, and is pinched minute protrusions (4) and prolong non-penetrative and rip trace (5) and pulled sub-fraction, and the soft chalk (1) that exposes has been spent a point.

Description of drawings:

Fig. 1, the soft chalk of plain edition band film health.

Fig. 2, the soft chalk of health band film health

1, soft chalk

2, plain edition film

3, health film

4, small embossment

5, rip trace

Claims (2)

1, the utility model is a kind of mainly by soft chalk (1) and the soft chalk of film (2) band film dimerous health, it is characterized in that adhering on the outer surface of said soft chalk (1) film (2) that last layer is closed state, said soft chalk can be the common chalk that contains amount of water.

2, the soft chalk of band film health according to claim 1 is characterized in that on the outer surface of film some projectioies (4) being arranged.

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