KR200464301Y1

KR200464301Y1 - A chalk holder

Info

Publication number: KR200464301Y1
Application number: KR2020120000258U
Authority: KR
Inventors: 이채민
Original assignee: 이채민
Priority date: 2012-01-11
Filing date: 2012-01-11
Publication date: 2012-12-31

Abstract

The present invention relates to a chalk holder, and the outer body tube made of a curable material; An inner tube inserted into the outer body tube and formed of a soft material having an inner diameter larger than that of chalk; A nut part fixed to one side of the inner tube; A spiral bolt part engaged with the nut part to move and fix the chalk push rod installed in the inner tube along the rotational direction in a forward / backward direction; Consists of a rotating means for rotating the spiral bolt portion to facilitate the drawing out of the chalk during use, and in particular to the chalk holder can be used more efficiently and efficiently by adjusting the draw out length of the chalk according to the user's needs It is about.

Description

Chalk Holder {A CHALK HOLDER}

The present invention relates to a chalk holder, to facilitate the withdrawal of the chalk during use, in particular to be able to use the more convenient and efficient by adjusting the withdrawal length of the chalk precisely according to the user's needs, the external impact It relates to a chalk holder that protects the chalk from the durability of the chalk.

Blackboard chalk, which is commonly used, is prepared by agglomeration of mineral powder and is made to separate particles in order to be smoothly written on the blackboard.

Therefore, when the user uses it with bare hands, there is a problem in that it is harmful to hygiene because the powder gets on the hands, so there is a need to always wash the hands cleanly after use. A chalk holder has also been developed that can be used.

In general, the chalk holder allows the user to write letters without holding the chalk in his hand, and the chalk holder should be able to be easily drawn out of the holder outside the holder to a length suitable for writing. Means for supporting to maintain the state are required.

5 includes a slider 20 having a main body 10 having a hollow portion 12 as shown in the conventional chalk holder, which is movably inserted into the main body, and the main body ( 10) is formed at the rear end of the hollow portion 12, the spring receiving portion 14 is extended radially in diameter.

The slider 20 is provided with a receiving portion for accommodating the chalk 40 inside the clamp 22 is configured to hold the chalk 40 is inserted into the receiving portion in the front, the rear end to the rear end of the main body 10 A pressing part 24 is formed to protrude and is pressed by the user, and the clamp 22 is formed to have an elastic force which is longitudinally cut in front and extends radially outward, and the pressing part 24 is the rear end of the slider. In the radially outward so as to extend the locking step (24a) is formed at its inner end.

In the conventional chalk holder having such a configuration, as shown in FIG. 6, the clamp 22 contracts when the slider 20 in which the spring 30 is inserted is inserted from the rear of the main body 10 with the clamp 22 forward. And the insertion is made and the clamp 22 is expanded at the time when the main body 10 leaves. In this state, the spring 30 always pushes the slider 20 backwards, so that the clamp 22 is held at the tip of the main body 10.

As shown in FIG. 7, the clamp 22 is pushed forward by pressing the pressing portion for the insertion of the chalk 40 and is radially expanded by high elasticity. In this case, the pressing portion 24 is released after the chalk 40 is inserted. At the same time as the retreat), the clamp 22 is tightened by the tip inner diameter of the main body 10 and clamps the chalk 40.

In this state, the spring force continuously pushes the slider backwards, so that the chalk 22 is stably fixed by the clamp 22.

Conventional chalk holders are pushed down when the chalk is drawn out in the same shape as when the chalk is inserted in the state in which the clamp 22 is lowered by gravity in the state in which the clamp 22 is lowered, but the conventional structure is Since the clamp 22 formed of a synthetic resin has an elastic force that extends outward, the elastic force decreases when the clamp 22 is used for a predetermined time, and thus the amount of expansion that is extended outwards even when the pressing portion is pressed is reduced. In particular, the user has a hassle of having to pull out the chalk by shaking the main body up and down or artificially expanding the clamp 22 when the above problems occur.

In addition, the conventional chalk holder is not only smooth withdrawal operation of the chalk, but also difficult to adjust the withdrawal length desired by the user to be drawn out so long that the chalk is easily broken, too short withdrawal of the use of chalk There was a difficult problem.

The present invention for improving the above problems is to prevent the chalk is protected from the external impact is cut, and to provide a chalk holder that can be used to draw out by adjusting the draw out length of the chalk exactly as desired for the user to use. Its purpose is to.

The present invention for achieving the above object and the outer body tube made of a curable material; An inner tube inserted into the outer body tube and formed of a soft material having an inner diameter larger than that of chalk; A nut part fixed to one side of the inner tube; A spiral bolt part engaged with the nut part to move and fix the chalk push rod installed in the inner tube along the rotational direction in a forward / backward direction; It is characterized by consisting of a rotating means for rotating the spiral bolt portion.

In the present invention, the rotating means is coupled to the outer body tube and the rotating part is rotated by the rotation handle without being separated; Guide ribs of a predetermined height protruding in the longitudinal direction on the inside of the rotation handle; A horizontal moving groove is provided at one side so as to be aligned with the guide rib and rotate simultaneously with the rotation knob, and comprises a movable disk fixedly installed at the end of the spiral bolt.

In the present invention, an intermediate control tube is inserted between the outer body tube and the inner tube, and the chalk push rod for elevating chalk while linearly moving inside the inner tube is a resin material having elasticity and the upper surface of chalk In accordance with the outer diameter is characterized in that the gripping groove is formed to hold the chalk is prevented from being separated.

The present invention protects the chalk by the inner tube of the soft material to reduce waste, and in particular, the user can draw the chalk to the outside of the holder by adjusting the drawing length so that the user is most suitable for writing. It has the effect of being able to write.

1 is a perspective view of an embodiment of the present invention.
Figure 2 is an exploded perspective view of Figure 1;
3 is a perspective view showing an operating state of the embodiment of the present invention,
a) is before chalk is drawn and b) is withdrawn chalk.
Figure 4 is a cross-sectional view showing the internal structure of the operating state of the present invention embodiment,
a) is before chalk is drawn and b) is withdrawn chalk.
Figure 5 is an exploded perspective view showing the configuration of a conventional chalk holder.
6 is a cross-sectional view of the coupled state of FIG.
7 is a cross-sectional view of the operating state of FIG.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of an embodiment of the present invention, Figure 2 is an exploded perspective view of FIG.

An embodiment of the present invention and the outer body tube 100 made of a curable material to form the appearance of the chalk holder; An inner tube 110 is inserted therein.

When a gap occurs due to the standard difference between the inner tube 110 and the outer body tube 100, it is preferable to insert an intermediate control tube 180 therebetween to prevent the shaking.

The inner tube 110 is inserted into the outer body tube 100 is installed, the chalk 200 is inserted into the movable so that the inner diameter is preferably made of a soft material larger than the outer diameter of the chalk (200). Do.

One side of the inner tube 110 is fixed to the nut part 120, the front and rear of the chalk push rod 130 installed in the inner tube 110 in accordance with the rotation direction in engagement with the nut portion 120 It is provided with a spiral bolt portion 140 for moving and fixing to, it is composed of a rotating means for rotating the spiral bolt portion 140.

The rotation means is composed of a guide rib 161 and a moving disk 170 in a structure capable of linear movement while rotating the spiral bolt portion 140 in accordance with the rotation of the rotation knob 160.

The rotation handle 160 is coupled to the rotatable state without being separated by being coupled by the outer body tube 100 and the rotation unit 150.

The rotating part 150 has a coupling groove 151 having a predetermined depth formed on the lower inner circumferential surface of the outer body tube 100, and coupling ribs 152 formed on the upper outer circumferential surface of the rotating handle 160 are coupled to each other. It is designed to be able to meet, but not to depart from each other.

A guide rib 161 having a predetermined height protruding in the longitudinal direction is provided inside the pivoting handle 160.

The movable disk 170 is fitted to the guide rib 161 and is provided with a horizontal moving groove 171 on one side so as to rotate simultaneously with the rotation knob 160 and the linear bolt portion, the spiral bolt portion 140 It is fixedly installed at the end of the unit.

The present invention as described above, the inner tube 110 is inserted into the chalk 200 is made of a soft material such as silicon to prevent the chalk is cut, and also to prevent the slipping out easily by friction rotation knob (160) By rotating the spiral bolt portion 140 by the user to be able to withdraw as accurately as the desired length.

That is, when the rotation knob 160 is rotated, the movable disk 170 inserted therein is rotated together, and the movable disk 170 has a horizontal movable groove 171 formed at one side thereof so that the pivot knob 160 is rotated. The inner surface of the guide rib 161 provided in the longitudinal direction is rotated together.

At this time, the screw bolt portion 140 is coupled to the movable disk 170 is aligned with the nut 120, so as to move in a linear longitudinal direction at the same time as the rotation disk 170, the horizontal movable groove 171 is a guide rib The linear movement is possible along 161.

Therefore, the spiral bolt portion 140 may push up or down the chalk 200 while linearly moving the chalk push rod 130 located inside the inner tube 110.

The chalk rod 130 for linear movement in the inner tube 110 and lifting the chalk 200 by the rotation means is made of a resin material having elasticity, and the upper surface coincides with the outer diameter of the chalk 200 to hold the chalk. The gripping groove 131 is formed to prevent the separation.

The chalk push rod 130 is a soft and elastic material that allows the chalk 200 inserted into the gripping groove 131 formed on the upper surface thereof to be accurately pulled out by the lifting means in the gripped state without being separated from itself. Even when the holder is dropped, the shock is absorbed from the external shock to prevent the chalk from breaking.

The present invention can adjust the position according to the thread pitch of the spiral bolt portion 140, so it can adjust the draw length of the chalk very finely provides the user with the most suitable draw length, and also the inner tube made of soft material chalk Since it is protected by 110, the fear of cutting is very small.

100: outer body tube 110: inner tube
120: nut 130: chalk stick
131: gripping groove 140: spiral bolt portion
150: rotating part 151: coupling groove
152: coupling rib 160: rotation handle
161: guide rib 170: moving disk
171: horizontal moving groove 180: intermediate control pipe
200: chalk

Claims

An outer body tube 100 made of a curable material;
An inner tube 110 inserted into the outer body tube 100 and made of a soft material having an inner diameter larger than that of the chalk 200;
A nut part 120 fixed to one side of the inner tube 110;
A spiral bolt part 140 engaged with the nut part 120 to move and fix the chalk mill 130 installed in the inner tube 110 in a forward / backward direction along a rotational direction;
Rotating handle 160 is rotated without being separated by being coupled by the outer body pipe 100 and the rotating part 150, the guide rib 161 of a predetermined height protruding in the longitudinal direction inside the rotation handle 160. ), A horizontal moving groove 171 is provided at one side so as to be aligned with the guide rib 161 and rotate simultaneously with the rotation knob 160, and integrated at the end of the spiral bolt part 140. Rotation means comprising a movable disk 170 fixed to the rotation, for rotating the spiral bolt portion 140;
Chalk holder, characterized in that consisting of.

delete

The method of claim 1,
An intermediate control tube 180 is inserted between the outer body tube 100 and the inner tube 110, and a chalk push rod 130 for elevating the chalk 200 while linearly moving inside the inner tube 110. ) Is a resin material having elasticity, the upper surface of the chalk holder, characterized in that the gripping groove 131 is formed to match the outer diameter of the chalk (200) to prevent the gripping is prevented.