CN203600832U - Chalk sleeve - Google Patents

Abstract

The utility model discloses a chalk sleeve which is made of plastic materials. The chalk sleeve can contain two chalks at the same time, for example a white chalk and a colored chalk. After the chalks are placed into the chalk sleeve, a teacher grabs the chalk sleeve when writing with the chalks, and therefore the hands are prevented from being stained by the chalks and chalks of different colors can be replaced conveniently in the writing process. The chalk sleeve comprises two casing pipes and two pressing rods, wherein the two casing pipes are connected together in an inserted mode, and the pressing rods are made of the plastics. Skirt edges of the lower parts of the pressing rods are stretched outwards and have certain elasticity, the pressing rods are sleeved with the casing pipes, and springs are arranged between the casing pipes and the pressing rods. When the pressing rods are pressed downwards, the casing pipes extend from the skirt edges of the lower parts of the pressing rods and are stretched outwards, the chalks are inserted into the pressing rods, the pressing rods are released, the pressing rods contract into the casing pipes through the springs, and the skirt edges of the lower parts of the pressing rods contract through the casing pipes so as to clamp the chalks.

Description

A kind of chalk sleeve

Technical field

The utility model relates to a kind of chalk sleeve, especially a kind ofly can, with the chalk sleeve of the chalk of two kinds of colors of fashionable dress, belong to teaching aid field.

Background technology

At present, teacher need to use chalk when writing on the blackboard at school, serves as a teacher while writing on blackboard with chalk, and chalk can be made hand dirty, if hand is encountered clothes when teachers, is just easy to be stained with chalk powder on clothes.In addition, when teacher irises out key content on blackboard, can use colored chalk, if blackboard is larger, while changing chalk, will go near chalk holder, the pastel of taking, the key content of going further place irises out, and relatively loses time.

Summary of the invention

For addressing the above problem, the utility model provides a kind of chalk sleeve, and chalk sleeve adopts plastic material.This chalk sleeve can be with two chalks of fashionable dress, and as white chalk and pastel, after chalk packs in chalk sleeve, what teacher grasped in the time writing with chalk word is chalk sleeve, thereby has avoided chalk that hand is made dirty.Also can conveniently in writing process, change the chalk of different colours.

Technical solution adopted in the utility model is: chalk sleeve comprises two sleeve pipes and two depression bars, and two sleeve pipes are plugged in together.Depression bar is plastic material, and the shirt rim of depression bar below is outwards opened and has certain elasticity, and depression bar is inserted in sleeve pipe, between sleeve pipe and depression bar, is provided with spring.Instantly when moulded rod, the shirt rim of depression bar below is stretched out sleeve pipe and outwards opens, and now, chalk is inserted in depression bar, discharges depression bar, and under the effect of spring, depression bar shrinks into sleeve pipe, and due to the effect of sleeve pipe, shrink the shirt rim of depression bar below, and chalk is clamped.

The beneficial effects of the utility model are the problems that efficiently solve make dirty while writing with chalk word hand and bad replacing different colours chalk, give lessons and provide a great convenience for teacher's writing on the blackboard, have higher promotional value.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is the cutaway view of the chalk sleeve that relates to of the utility model.

Fig. 2 is the parts explosive view of the chalk sleeve that relates to of the utility model.

Fig. 3 is the cased structural representation of the chalk sleeve that relates to of the utility model.

Fig. 4 is the structural representation of the upper sleeve pipe of the chalk sleeve that relates to of the utility model.

Fig. 5 is the structural representation of the depression bar of the chalk sleeve that relates to of the utility model.

Sleeve pipe on 1. in figure, sleeve pipe groove on 11., sleeve pipe spring boss on 12., 2. upperpush rod, 21. upperpush rod driving levers, 22. upperpush rod spring stops, 23. upperpush rod shirt rims, 3. go up sleeve pipe spring, 4. pastel, 5. setting of casing, 51. setting of casing groove one, 52. setting of casing grooves two, 53. setting of casing spring boss, 6. down-pressed pole, 7. setting of casing spring, 8. white chalk.

The specific embodiment

Upper sleeve pipe (1) is provided with sleeve pipe groove (11) and upper sleeve pipe spring boss (12).Upper sleeve pipe spring (3) is put on upper sleeve pipe spring boss (12), upperpush rod (2) is inserted in upper sleeve pipe (1), and sleeve pipe spring (3) is contacted with upperpush rod spring stop (22), now, the bottom surface of upperpush rod shirt rim (23) is concordant with the bottom surface of upper sleeve pipe (1).In upperpush rod driving lever (21) embedding in sleeve pipe groove (11).Special instruction, before upperpush rod (2) is put into upper sleeve pipe (1), outwards open the upperpush rod shirt rim (23) on it.

Setting of casing (5) is provided with setting of casing groove one (51), setting of casing groove two (52) and setting of casing spring boss (53).Setting of casing spring (7) is put into setting of casing spring boss (53) upper, down-pressed pole (6) is inserted in setting of casing (5).Down-pressed pole driving lever (61) embeds in setting of casing groove one (51).

Upper sleeve pipe (1) is inserted in setting of casing (5), completes the assembling of chalk sleeve.

The course of work of the present utility model is: pin upperpush rod driving lever (21), press depression bar (2) downwards, now, upperpush rod shirt rim (23) is forced out sleeve pipe (1), open upperpush rod shirt rim (23), pastel (4) is inserted in upperpush rod (2), discharge upperpush rod driving lever (21), under the effect of upper sleeve pipe spring (3), upperpush rod (2) is pressed into sleeve pipe (1), and pastel (4) is tightened up and clamped in upperpush rod shirt rim (23).It is identical that white chalk (8) packs operating process in down-pressed pole (6) into.

Claims (5)

1. a chalk sleeve, chalk sleeve adopts plastic material, chalk sleeve comprises sleeve pipe (1), upperpush rod (2), upper sleeve pipe spring (3), setting of casing (5), down-pressed pole (6), setting of casing spring (7), it is characterized in that: upperpush rod (2) is inserted in sleeve pipe (1), between upper sleeve pipe (1) and upperpush rod (2), be provided with sleeve pipe spring (3), down-pressed pole (6) is inserted in setting of casing (5), between setting of casing (5) and down-pressed pole (6), is provided with setting of casing spring (7).

2. chalk sleeve according to claim 1, is characterized in that: upper sleeve pipe (1) is provided with sleeve pipe groove (11) and upper sleeve pipe spring boss (12).

3. chalk sleeve according to claim 1, it is characterized in that: upperpush rod (2) is provided with upperpush rod driving lever (21), Pressure-bar spring baffle plate (22) and upperpush rod shirt rim (23), before upperpush rod (2) is put into upper sleeve pipe (1), outwards open the upperpush rod shirt rim (23) on it.

4. chalk sleeve according to claim 1, is characterized in that: setting of casing (5) is provided with setting of casing groove one (51), setting of casing groove two (52) and setting of casing spring boss (53).

5. chalk sleeve according to claim 1, is characterized in that: upper sleeve pipe (1) is plugged in together with setting of casing (5).

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