CN203818793U - Chalk cover - Google Patents

Abstract

The utility model discloses a chalk cover which comprises a hollow clamp body provided with a closed right end and an open left end, wherein the outer part of the clamp body is sleeved with a movable rubber jacket; an outer spring for enabling the rubber jacket to move leftwards to be reset is arranged between the rubber jacket and the clamp body; an inner spring fixed at the closed end is arranged in the inner cavity of the clamp body; elastic clamping pieces used for clamping chalks are uniformly arranged at the left end of the clamp body in the circumferential direction. According to the chalk cover provided by the utility model, chalks can be put in and taken out of the chalk cover and the chalk length can be controlled without touching chalks by hands; besides, the rubber jacket can lower the friction between the hands and the chalk cover, so that the chalk cover is more suitable for being mastered.

Description

A kind of chalk sleeve

Technical field

The utility model relates to teaching classroom apparatus, relates in particular to a kind of for clamping the chalk sleeve of chalk.

Background technology

At present, use and in chalk sleeve material, generally adopt metal or rigid plastics comparatively widely, by manual operation, chalk is packed in chalk sleeve; And the rate that puts into production of chalk holder and utilization rate are not high, chalk can only be deposited in original-pack papery square box.

Because chalk close-packed arrays is in chalk holder, so extract the chalk tactile chalk that must catch from chalk holder, inevitably, while manually loading and unloading chalk turnover chalk sleeve, also run into same problem.The Long Term Contact of hand and chalk will cause huge injury to skin undoubtedly, must cause that teacher writes inconvenience and common flour pen cap material is really up to the mark, affect classroom instruction.

Utility model content

For above-mentioned technical problem, the utility model is intended to solve the problems of the technologies described above at least to a certain extent.

Can not avoid loading the problem of process contact chalk in order to overcome existing chalk sleeve, the utility model provides a kind of simple in structure, easy to operate chalk sleeve.

The utility model solves the technical scheme that its technical problem adopts:

A kind of chalk sleeve, comprise the hollow clamp of right-hand member sealing left end opening, described clamp outer cover is provided with movably rubber chuck, between described rubber chuck and clamp, be provided with make rubber chuck move to left reset outer spring, the inner chamber of described clamp is provided with the inner spring that is fixed on blind end, and the left end of described clamp is along being circumferentially evenly provided with the elastic clip for clamping chalk.

Further, the inwall of described rubber chuck is provided with the collar flange extending internally, and described clamp periphery wall is provided with step, and described outer spring is arranged between rubber chuck and clamp and two ends connect with flange and step respectively.

Further, the left end of described rubber chuck is provided with the running-on that diameter diminishes gradually.

Further, on described clamp, be also provided with hook.

As supporting, the utility model also provides a kind of chalk holder, and described chalk holder comprises cuboid box body, is arranged on the push button of box portion right side bottom, is arranged on the back-moving spring on push button.Cuboid box body can hold 10 chalks, and chalk 5 is radially stacked.The bottom of box portion left side, has a hole and chalk size to adapt, and goes out for chalk taking.Push button is positioned at box portion right side bottom, by pressing push button, and the extended box portion left of the chalk side aperture of bottommost in box, the enough chalk sleeves of outreach are connected with chalk.

Chalk sleeve comprises clamp, rubber sleeve, inner spring, outer spring.

When use, first, chalk end withstands blackboard, then holds rubber chuck, presses clamp top simultaneously, and rubber chuck is to the displacement of clamp blind end, and compresses outer spring, and the elastic clip that impels clamp left end opens at self elastic reaction under shed.The distance of rubber chuck displacement is larger, and elastic clip open-angle is larger.Move up and down rubber chuck along chalk axial direction, the length that can control chalk and stretch out clamp.

Compared with prior art, the beneficial effects of the utility model are: the chalk sleeve that the utility model provides need not contact chalk by hand, just can realize handling chalk and control chalk length, rubber chuck can reduce the friction of hand and chalk sleeve simultaneously, is more suitable for grasp.

Brief description of the drawings

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

Fig. 2 is that clamp of the present utility model partly cuts open organigram.

Fig. 3 is that schematic diagram is looked on a clamp of the present utility model left side.

Fig. 4 is chuck cross-sectional schematic of the present utility model.

Fig. 5 is that schematic diagram is looked on a chuck of the present utility model left side.

Fig. 6 the utility model chalk clamping process decomposing schematic representation.

Schematic perspective view after Fig. 7 the utility model clamping chalk.

Fig. 8 is the structural representation of chalk holder.

Fig. 9 is the schematic diagram that chalk sleeve is hung on chalk holder.

In figure: 1-rubber chuck; 11-flange; 12-running-on; 2-clamp; 21-hook; 22-elastic clip; 3-inner spring; 4-outer spring; 5-chalk; 6-box body; 7-back-moving spring; 8-push button.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, utility model object of the present utility model is described in further detail, embodiment can not repeat one by one at this, but therefore embodiment of the present utility model is not defined in following examples.Unless stated otherwise, the utility model adopts material and processing method are the art conventional material and processing method.

As shown in Figures 1 to 5, a kind of chalk sleeve, comprise the hollow clamp 2 of right-hand member left end, described clamp 2 outer cover are provided with movably rubber chuck 1, between described rubber chuck 1 and clamp 2, be provided with make rubber chuck 1 move to left reset outer spring 4, the inner chamber of described clamp 2 is provided with the inner spring 7 that is fixed on blind end, and the left end of described clamp 2 is along being circumferentially evenly provided with the elastic clip 22 (as shown in Figure 2) for clamping chalk 5.

Particularly, as shown in Figures 2 to 5, the inwall of described rubber chuck 1 is provided with the collar flange 11 extending internally, and described clamp 2 periphery walls are provided with step, and described outer spring 4 is arranged between rubber chuck 1 and clamp 2 and two ends connect with flange 11 and step respectively.

As shown in Figure 2, the left end of described rubber chuck 1 is provided with the running-on 12 that diameter diminishes gradually.

On described clamp 2, be also provided with hook 21, conveniently chalk sleeve be hung on to chalk holder or other suitable positions, as in Fig. 9, chalk sleeve is hung up the outer wall at chalk holder.

Fig. 6 is the clamping process exploded view of chalk, first, as shown in Fig. 6-a, the left end of chalk sleeve is aimed to chalk 5; Then when clamp 2 right-hand members are pressed, the relative clamp 2 of chuck 1 moves to right and compresses outer spring 4, and the elastic clip of clamp 2 left ends stretches out and outwards opens, as shown in Fig. 6-b; Then chalk 5 is pressed into from left side clamp 2 cavitys and (sees Fig. 6-c), and remove the pressing force to clamp 2 right-hand members, under the restoring force effect of outer spring [4], clamp 2 left ends are regained in rubber chuck 1, described elastic clip is inward collapsible under the effect of rubber chuck 1, (sees Fig. 6-d) thereby clamp chalk 5.

Chalk 5 is after using a period of time to shorten, user presses the right-hand member of clamp 2, make elastic clip 22 stretch out outside rubber chuck 1 and outwards open, cancel the clamping action of many chalks 5, now under the elastic reaction of the inner spring 3 in clamp 2, chalk 5 is pushed out a bit of left, then decontroling the right-hand member of clamp 2 presses, under the restoring force effect of outer spring 4, clamp 2 left ends are regained in rubber chuck 1, described elastic clip 22 inward collapsible again under the effect of rubber chuck 1, thus again clamp chalk 5 (seeing Fig. 7).

Fig. 8 is the structural scheme of mechanism of chalk holder, and the bottom, right side of box body 6 is provided with push button 8, presses push button 8 and can make chalk 5 release from the circular hole of box body 6 left bottom.Unclamp after push button, because of the restoring force of back-moving spring 7, push button 8 rebounds, and top chalk 5 falls down, and realizes the circulation that chalk 5 takes out, and chalk holder not only can be deposited chalk steadily, and takes also very conveniently, and has avoided catching and has touched the process of chalk.

Above-described embodiment of the present utility model is only for the utility model example is clearly described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.All any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in the protection domain of the utility model claim.

Claims (4)

1. a chalk sleeve, it is characterized in that, comprise the hollow clamp (2) of right-hand member sealing left end opening, described clamp (2) outer cover is provided with movably rubber chuck (1), between described rubber chuck (1) and clamp (2), be provided with make rubber chuck (1) move to left reset outer spring (4), the inner chamber of described clamp (2) is provided with the inner spring (7) that is fixed on blind end, and the left end of described clamp (2) is along being circumferentially evenly provided with the elastic clip (22) for clamping chalk (5).

2. chalk sleeve according to claim 1, it is characterized in that: the inwall of described rubber chuck (1) is provided with the collar flange (11) extending internally, described clamp (2) periphery wall is provided with step, and described outer spring (4) is arranged between rubber chuck (1) and clamp (2) and two ends connect with flange (11) and step respectively.

3. chalk sleeve according to claim 2, is characterized in that: the left end of described rubber chuck (1) is provided with the running-on (12) that diameter diminishes gradually.

4. chalk sleeve according to claim 3, is characterized in that: on described clamp (2), be also provided with hook (21).