chalk holder

Abstract

To provide an inexpensive, safe and easy-to-use chalk holder, causing no labor nor stress in use, with usability, fittable to every chalk to be used, easily replenished at any time and at any place where the chalk is present, and allowing use by even a child.SOLUTION: A chalk holder allows mass production by using widely available plastic materials, forming only one component, simplifying a shape, and using a metal mold.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a chalk holder used for writing characters with chalk on a blackboard or the like. [Background technology]

[0002] There are already a variety of chalk holders on the market, but many of them are expensive and have complicated structures. If one part breaks down, it becomes unusable, and it is difficult to replenish. Many of them are also large and heavy. Parts of the device that secures the chalk to the chalk holder itself, and the device that inserts and removes the chalk This is because the parts are incorporated. Summary of the Invention [Problem to be solved by the invention]

[0003] This chalk holder allows you to write letters and other things using both long and short chalk in the same way. It is used to make it easier to write and to prevent chalk dust from getting on your hands. By simplifying the structure and making it small and light, it can be mass-produced at low cost. Therefore, it will not get dirty with chalk dust, will not break, and can be easily stored in a pencil case. It can be easily carried around. [Means for solving the problem]

[0004] There in, This chalk holder has a vertical slit in one place. The edge of the slit is cut diagonally so that the pads of your fingers can fit over it. On the other side, there is a thin section to give it plasticity and elasticity. You support it with your thumb and use the pads of your index, middle, and ring fingers to push open the slit, insert the chalk, and then release your fingers to use the elasticity of the plastic to return to its original shape, holding the chalk in place. The cut of the slit has a certain thickness to prevent the chalk from being pressed or touched by the pads of your fingers when pushing it open.

[0005] The tube features slits, thin elastic plastic sections, and thick, non-deformable plastic sections, allowing the pressure of the fingers to be easily transmitted to the attached chalk, ensuring a secure hold. When drawing thick or thin lines, the pressure of the fingers changes automatically, allowing the chalk to be securely held in place without any effort. Because it consists of only one component and is inexpensive to manufacture, many can be stocked at once and attached to all the chalks used. If damaged, it can be easily replaced. Since the thickness and length of the holder are virtually the same as the chalk itself, it is stress-free to use. By pushing the slits apart with the pads of your fingers, you can quickly attach and adjust the length of the chalk. The chalk is visible through the slits, allowing you to easily identify the remaining amount and color. This chalk holder is suitable for children because of its easy operation, safe construction and materials, and affordable price, allowing for quick replacement if broken.

[0006] By creating a slit in the tube and providing a thick arc section that is resistant to deformation even when force is applied, the chalk can be securely held in place by the pressure of the fingers gripping it to write. By gripping hard chalk with hard plastic, the chalk can be securely held in place even if it becomes quite short. Furthermore, to provide flexibility, a slightly thinner section of a certain width is provided in the middle of the thick arc, allowing for a firm and elastic grip on chalk of slightly different thicknesses. [Effects of the Invention]

[0007] This chalk holder is roughly the same size as the chalk itself, even when filled with it. It can be pinched between your fingers or held between your fingers, making it convenient for writing with two or more different colors of chalk using only your dominant hand. Attaching it to a ruler or similar object with a rubber band makes it convenient for drawing two or more parallel lines of different colors at once. Its rounded shape allows you to rotate it with your fingers while writing, allowing you to control the thickness of the lines. Even when held long, the chalk won't break, allowing you to write quickly using your fingers, wrist, and arm, from small to large characters. Its snap action also allows you to write strokes such as the final strokes of hiragana and kanji characters correctly. [Brief explanation of the drawings]

[0008] [Figure 1] Cross-sectional view of a chalk holder according to the present invention. [Figure 2] A side perspective view of a chalk holder according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] It is a generally cylindrical shape with both ends open, and a slit-like gap is formed across both ends in the longitudinal direction of the cylinder. The opposing walls of the gap forming the slit are arranged outward from the cylinder and at both ends in the longitudinal direction of the cylinder. The portion of the cylinder facing the slit-shaped gap has a predetermined width, and the This chalk holder is characterized by having a thin wall on both ends of the longitudinal direction of the recording tube. In other words, it is large enough and long enough to fit a commercially available piece of chalk, and can be pressed with a finger. To the extent that it does not deform It is a thick plastic round tube (Figure 2). A slit 3 is made in the center of the opposite part, and arcs 4 and 6 are formed on the left and right sides with the center line 5 as the boundary. A chalk holder that is tilted inward at an appropriate angle and has as narrow a slit as possible. The edges of the slits (1 and 2) are slightly thicker and the corners are cut diagonally. 。

[0010] The left and right portions located in a direction perpendicular to the direction toward the thin portion facing the slit are The choke holder is formed thin with a predetermined width across both ends in the longitudinal direction, and the slit and From the left and right thin-walled portions located in a direction perpendicular to the direction toward the opposing thin-walled portions, A chalk holder characterized in that the left and right portions facing the slit are formed thicker. 。 That is, on the other side of the slit, there is a certain width of meat that can be bent and stretched when pressed with a finger. The thin part 5 is provided. Also, the elastic part is provided in the middle of the left and right arcs that are tilted inward. In order to have a certain thickness, a choke holder with a thin arc part 6 is set. Yes. The surface of the thick part of the tube that comes into contact with the choke is an arc, but the outside of the tube is an elliptical arc. 。

[0011] Therefore, this chalk holder has a vertical slit in one place. The edge of the pad is cut at an angle so that the pad of your finger can rest on it. It has a thin section to provide strength. It is supported by the thumb, index finger, middle finger, and ring finger. Use the belly of the device to push the slit open, and after applying the choke, release your finger and the device will return to its original position. The chalk is held in place by utilizing the elasticity of the plastic. To prevent the chalk from being pressed or touched by the belly of the It has a certain thickness.

[0012] By providing slits in the tube or thin elastic plastic parts, the product will not deform even when pressed. The thick plastic part prevents pressure from being transmitted to the attached chalk. It is easy to grip and holds the chalk securely. When writing thick or thin lines, the grip of your fingers is The pressure changes automatically, so you can secure the choke properly without even thinking about it. It consists of only one part and can be manufactured cheaply, so when used, many You can prepare several and attach them to all the chalk you use. It can be replaced. It is almost the same thickness and length as chalk, so when you use it, No stress. By pushing the slit with your fingertips, you can easily attach the chalk and adjust its length. The adjustment can be done quickly. Also, the chalk can be seen through the slits, so you can easily identify the remaining amount and color. It is easy to operate, and is made of safe structures and materials. It is a suitable chalk for children because it is priced so that it can be easily replaced if it breaks. It is a holder. [Explanation of symbols]

[0013] 1 Part to be spread apart with your fingers 2. The part that you push open with your fingers 3 slits 4 The part that grips the chalk with the pressure of your fingers 5 The thinned part allows it to be bent and stretched so that it can be pushed open to insert or remove chalk or adjust the length. 6 The thin part allows the chalk to be held in place elastically regardless of thickness.

Claims

[Claim 1] A chalk holder characterized in that it is approximately cylindrical and open at both ends, forming a slit-like gap along both longitudinal ends of the tube, and the opposing walls of the gap forming the slit are formed by expanding outwardly from the tube to both longitudinal ends of the tube, the portion of the tube facing the slit-like gap is thin-walled by a predetermined width along both longitudinal ends of the tube, and the left and right portions located in a direction perpendicular to the direction toward the thin-walled portion facing the slit are thin-walled by a predetermined width along both longitudinal ends of the chalk holder, and the left and right portions are thick-walled from the left and right thin-walled portions located in a direction perpendicular to the direction toward the thin-walled portion facing the slit toward the slit.

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