CN206926432U - Chalk clamp - Google Patents

Abstract

The chalk jacket includes a screw rod, an end cap and a pen container. The axis of the pen container is the left and right horizontal direction. The end cap is screwed to the right end of the pen container. There is a through hole on the end cap, and a screw sleeve is fixed on the left side of the end cap. The screw sleeve, the through hole and the pen holder are coaxially arranged, the screw rod is penetrated in the screw sleeve and the through hole, the screw rod is threadedly connected with the screw sleeve, the left end of the screw rod is fixed with a top plate, the right end of the screw rod is fixed with a handle; the inner wall of the pen holder is fixed An elastic sleeve is provided, and the thickness of the elastic sleeve increases sequentially from right to left; in summary, the utility model has a reasonable structural design, and the clamping is firm respectively. The teacher uses the device to clamp chalk, thereby preventing the teacher's hands from The skin is protected by direct contact with the chalk, which ensures the health of the teacher, and the chalk will not be broken due to strong grip, and is convenient to use.

Description

chalk jacket

technical field

The utility model relates to a teaching tool, in particular to a chalk jacket.

Background technique

Chalk is a tool widely used in daily life. School teachers need to use chalk to write teaching content on the blackboard during class. Usually, teachers hold chalk to write, so that fingers and palms are in direct contact with chalk, which makes the skin eroded by lime , which will affect health; in addition, teachers may use too much force when writing on the blackboard, which will break the chalk and affect the writing on the blackboard, which is very inconvenient.

Utility model content

In order to solve the deficiencies in the prior art, the utility model provides a chalk jacket with a reasonable structural design, which can prevent the hand from directly contacting the chalk and prevent fingers from breaking the chalk during writing.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme: the chalk jacket includes a screw rod, an end cap and a pen container, the axis direction of the pen container is the left and right horizontal direction, and the end cap is threadedly connected to the right end of the pen container, and the end cap is provided with The through hole, the left side of the end cap is fixed with a screw sleeve, the screw sleeve, the through hole and the pen holder are coaxially arranged, the screw rod is set in the screw sleeve and the through hole, the screw rod is threaded with the screw sleeve, and the left end of the screw rod is fixedly provided with The top plate and the right end of the screw rod are fixedly provided with a handle; the inner wall of the pen holder is fixedly provided with an elastic sleeve, and the thickness of the elastic sleeve increases sequentially from right to left.

The right end of the pen container is provided with an external thread, and the inner side of the end cap is provided with an internal thread, and the end cap is connected with the external thread of the pen container through the internal thread.

A sealing ring is arranged between the left end of the screw sleeve and the screw rod.

With the above technical solution, when using the utility model, first screw open the end cover, insert the chalk in the elastic sleeve, then reinstall the end cover on the right end of the pen container, and rotate the screw rod in the screw sleeve by rotating the handle Finally, the screw rod moves to the left, and the top plate at the left end of the screw rod is pressed against one end of the chalk. With the rotation of the handle, the top plate pushes the chalk out, and finally one end of the chalk stretches out from the left end of the pen holder, and you can hold the pen holder for writing; All the chalks are cone structure, and the thickness of the elastic sleeve of the utility model gradually increases, so in the process of writing, the chalk will not fall out of the pen container, the elastic sleeve can hold the chalk well, and at the same time it will not It will cause damage to the chalk; in addition, preferably, the right end of the pen container is provided with external threads, and the inner side of the end cap is provided with internal threads. The fit of the threaded connection, if there is an external thread on the outside of the end cap, and an internal thread on the inside of the pen holder, through this thread connection, chalk foam is easy to accumulate on the internal thread of the pen holder, thus affecting the connection between the end cap and the pen holder. The thread fit between the thread; similarly, a sealing ring is provided between the left end of the screw sleeve and the screw rod, and the sealing ring prevents chalk foam from entering the screw sleeve, thereby affecting the thread fit between the screw sleeve and the screw rod; the teacher is using the utility model When writing, the strength of the fingers is exerted on the pen holder, and the chalk does not directly bear the grip strength of the fingers, so the chalk can be kept from being broken.

To sum up, the utility model has a reasonable structural design, and the clamping is firm respectively. The teacher uses the device to clamp the chalk, thereby preventing the teacher's hand from directly contacting the chalk, and the skin is protected, ensuring the teacher's health. Moreover, the chalk will not be broken due to strong grip strength, and the utility model is convenient to use.

Description of drawings

Fig. 1 is a structural representation of the utility model.

detailed description

As shown in Figure 1, the chalk jacket of the present utility model comprises screw rod 1, end cap 2 and pen container 3, is left and right horizontal direction with the axial direction of pen container 3, and end cap 2 is screwed on the right end of pen container 3, and end cap 2 There is a through hole 4 on the top, the left side of the end cover 2 is fixed with a screw sleeve 5, the screw sleeve 5, the through hole 4 and the pen holder 3 are coaxially arranged, the screw rod 1 is penetrated in the screw sleeve 5 and the through hole 4, and the screw rod 1 1 is threadedly connected with the screw sleeve 5, the left end of the screw rod 1 is fixed with a top plate 6, the right end of the screw rod 1 is fixed with a handle 7; the inner wall of the pen holder 3 is fixed with an elastic sleeve 8, and the thickness of the elastic sleeve 8 increases from right to left. big.

The right end of pen container 3 is provided with external thread, and the inner side of end cap 2 is provided with internal thread, and end cap 2 is connected with the external thread of pen container 3 by internal thread.

A sealing ring 9 is provided between the left end of the screw sleeve 5 and the screw rod 1 .

When using the utility model, first screw open the end cap 2, insert the chalk 10 in the elastic sleeve 8, then reinstall the end cap 2 on the right end of the pen holder 3, and rotate the handle 7 to make the screw rod 1 in the screw sleeve Rotate within 5, finally the screw rod 1 moves to the left, the top plate 6 at the left end of the screw rod 1 presses against one end of the chalk 10, with the rotation of the handle 7, the top plate 6 pushes the chalk 10 out, and finally one end of the chalk 10 stretches out from the left end of the pen container 3 , that is, you can hold the pen holder 3 for writing.

This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the utility model belong to the technology of the utility model. protection scope of the program.

Claims (3)

1. The chalk jacket is characterized in that: it includes a screw rod, an end cap and a pen container, and the axis direction of the pen container is the left and right horizontal direction. The end cap is threadedly connected to the right end of the pen container. A screw sleeve is fixed, the screw sleeve, the through hole and the pen holder are coaxially arranged, the screw rod is passed through the screw sleeve and the through hole, the screw rod is threaded with the screw sleeve, the left end of the screw rod is fixedly provided with a top plate, and the right end of the screw rod is fixedly provided with a handle; the inner wall of the pen container is fixedly provided with an elastic sleeve, and the thickness of the elastic sleeve increases sequentially from right to left. 2. The chalk jacket according to claim 1, characterized in that: the right end of the pen container is provided with an external thread, the inner side of the end cap is provided with an internal thread, and the end cap is connected to the external thread of the pen container through the internal thread. 3. The chalk jacket according to claim 1, characterized in that: a sealing ring is provided between the left end of the screw sleeve and the screw rod.