CN211918189U

CN211918189U - Chalk sleeve

Info

Publication number: CN211918189U
Application number: CN202020370535.9U
Authority: CN
Inventors: 伍辉燕; 詹小佳; 吕霞; 王昺琛
Original assignee: Guilin Normal College
Current assignee: Guilin Normal College
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2020-11-13
Anticipated expiration: 2030-03-23

Abstract

The utility model discloses a chalk sleeve, including portion of gripping, clamping part, baffle, separation blade and guard shield. Install baffle and separation blade in the portion of gripping, the clamping part is installed to the one side that the baffle was kept away from to the portion of gripping, puts into the back with the chalk from the portion of gripping, through baffle and separation blade and the fixed chalk of clamping part, the guard shield is installed and is kept away from portion of gripping one side at the clamping part, covers the chalk that exposes from the clamping part, rotates the guard shield and can expose the unused part of chalk to in the use, the hand is all at the contact guard shield, has avoided the hand directly to contact with the chalk.

Description

Chalk sleeve

Technical Field

The utility model relates to a teaching aid field especially relates to a chalk cover.

Background

Along with the development of the society, more schools are built between cities and countryside, the use amount of chalks is increased, however, most of teachers or students directly hold the chalks when using the chalks, and therefore the health of the teachers is not sanitary and affected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a chalk cover, aim at solving because of the teacher holds the chalk insanitary, influences the healthy problem of teacher.

In order to achieve the above purpose, the utility model provides a chalk sleeve,

the clamping device comprises a holding part, a clamping part, a baffle and a protective cover, wherein the holding part is provided with a first through hole, a first groove and a second groove, the first through hole penetrates through the holding part, the first groove is positioned on one side of the holding part, the second groove is positioned on one side of the holding part far away from the first groove, the baffle is rotatably connected with the holding part and positioned in the first groove, the baffle is slidably connected with the holding part and positioned on one side far away from the first groove, the clamping part is provided with a second through hole, the second through hole penetrates through the clamping part, the cross section of the second through hole is in an isosceles trapezoid shape, the clamping part is fixedly connected with the holding part and positioned on one side of the holding part far away from the baffle, the second through hole and the first through hole are positioned on the same axis, and the protective cover is in threaded connection with the clamping part, and the chalk is positioned at one side of the clamping part far away from the holding part, and the chalk is positioned in the second through hole and the protective cover.

The holding part is provided with a limiting piece, and the limiting piece is positioned in the first groove.

The separation blade comprises a separation blade body and a spring, the separation blade body is in sliding connection with the holding portion and is located in the second groove, and the spring is fixedly connected with the separation blade body and the holding portion and is located between the separation blade body and the holding portion.

The protective cover is provided with a rubber ring, and the rubber ring is positioned on one side, far away from the clamping part, of the protective cover and encloses chalk.

Wherein the shroud surface has a plurality of third grooves.

The baffle plate is provided with a gasket, and the gasket is positioned on one side, close to the chalk, of the separation blade.

The chalk sleeve comprises an extension rod, and the extension rod is fixedly connected with the blocking piece and is positioned in the through hole.

According to the chalk sleeve, after the chalk passes through the first through hole, the baffle plate is rotated, so that the baffle plate fixes the chalk under the action of the baffle plate; the chalk clamping part is provided with a through hole with an isosceles trapezoid cross section, the chalk can be fixed by the through hole and cannot continuously slide out of the clamping part forwards due to the fact that the cross section of the chalk is isosceles trapezoid, the protective cover is in threaded connection with the clamping part and can cover the chalk exposed out of the clamping part, therefore, when the chalk is long, the protective cover can be held by a hand, direct contact between the hand and the chalk is avoided, after the chalk is short, the protective cover can be rotated, the protective cover is moved backwards under the action of threads, and therefore the chalk exposed behind is continuously written, and in the using process, the hand does not need to directly contact the chalk, so that the problem that sanitation is not caused due to the fact that the chalk is held by the hand, and the health of teachers is.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a back view of a chalk cover according to the present invention;

FIG. 2 is a cross-sectional view of a chalk cover of the present invention;

FIG. 3 is a partial cross-sectional view of a chalk cover of the present invention;

fig. 4 is a front structural view of a chalk holder of the present invention.

1-holding part, 2-clamping part, 3-baffle, 4-blocking piece, 5-protective cover, 6-extension rod, 7-chalk, 11-first through hole, 12-first groove, 13-second groove, 14-limiting piece, 21-second through hole, 41-blocking piece body, 42-spring, 51-rubber ring, 52-third groove and 31-gasket.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, 2 and 3, the present invention provides a chalk cover:

comprises a holding part 1, a clamping part 2, a baffle 3, a baffle 4 and a shield 5, wherein the holding part 1 is provided with a first through hole 11, a first groove 12 and a second groove 13, the first through hole 11 penetrates through the holding part 1, the first groove 12 is positioned on one side of the holding part 1, the second groove 13 is positioned on one side of the holding part 1 far away from the first groove 12, the baffle 3 is rotatably connected with the holding part 1 and positioned in the first groove 12, the baffle 4 is slidably connected with the holding part 1 and positioned on one side far away from the first groove 12, the clamping part 2 is provided with a second through hole 21, the second through hole 21 penetrates through the clamping part 2, the cross section of the second through hole 21 is isosceles trapezoid, the clamping part 2 is fixedly connected with the holding part 1 and positioned on one side of the holding part 1 far away from the baffle 3, the second through hole 21 and the first through hole 11 are located on the same axis, the protective cover 5 is in threaded connection with the clamping portion 2 and located on one side, away from the holding portion 1, of the clamping portion 2, and the chalk 7 is located in the second through hole 21 and the protective cover 5.

In the embodiment, the middle of the holding part 1 is provided with a first through hole 11, when chalk 7 is installed, the chalk 7 passes through the first through hole, the baffle plate 3 is rotatably connected with the holding part 1 and is positioned in the first groove 12, and after the chalk 7 passes through, the baffle plate 3 is rotated to enable the baffle plate 3 to contact the chalk 7; the baffle plate 4 is connected with the holding part 1 in a sliding manner, so that after the baffle plate 3 blocks the chalk 7, the baffle plate 3 is fixed by the sliding baffle plate 4 and cannot rotate, and the position of the chalk 7 is fixed; the clamping part 2 is provided with a second through hole 21, the section of the second through hole 21 is isosceles trapezoid, the clamping part 2 is fixedly connected with the holding part 1 and is positioned on one side of the holding part 1 far away from the baffle 3, the chalk 7 enters from the first through hole 11 when the chalk 7 is installed, the larger end of the chalk 7 is positioned in the second through hole 21, the chalk 7 can be fixed by the second through hole 21 and cannot continuously slide out of the clamping part 2 to the smaller side of the isosceles trapezoid, the shield 5 is in threaded connection with the clamping part 2, the shield 5 can cover the chalk 7 exposing the clamping part 2, so that the shield 5 can be held by hands when the chalk 7 is longer to avoid the hands from directly contacting with the chalk 7, and the shield 5 can be rotated after the chalk 7 is short, the protective cover 5 is moved backwards under the action of the screw threads, so that the chalk 7 behind is exposed for continuous writing, and in the using process, hands do not need to directly contact the chalk 7, so that the problem that the health of teachers is affected due to unsanitary holding of the chalk 7 by the hands is solved.

Further, the holding portion 1 has a limiting piece 14, and the limiting piece 14 is located in the first groove 12.

In this embodiment, the stopper 14 is used to limit the rotational position of the shutter 3 so that the shutter is always located in the first groove 12 and does not affect the rotation of the shield 5.

Further, the baffle 4 comprises a baffle body 41 and a spring 42, the baffle body 41 is slidably connected with the holding portion 1 and is located in the second groove 13, the spring 42 is fixedly connected with the baffle body 41 and the holding portion 1 and is located between the baffle body 41 and the holding portion 1,

in the present embodiment, the spring 42 between the holder body 41 and the grip portion 1 can move the holder body 41 to the vicinity of the shutter 3, and the holder body 41 can fix the position of the shutter 3 after the shutter 3 rotates to receive the chalk 7.

Further, referring to fig. 4, the shield 5 has a rubber ring 51, and the rubber ring 51 is located on the side of the shield 5 away from the clamping portion 2 and between the chalk 7 and the shield 5.

In the present embodiment, the rubber ring 51 supports the chalk 7 so that it is not easily broken when the force is too large, and since the section of the chalk 7 is gradually enlarged, the rubber ring 51 can follow the enlargement, thereby providing the required holding force.

Further, the baffle 3 is provided with a gasket 31, and the gasket 31 is positioned on the side, close to the chalk 7, of the baffle 4.

In the present embodiment, the spacer 31 may increase the pressure on the chalk 7 when the blocking plate 3 blocks the chalk 7, so that the chalk 7 is more firmly fixed by the clamping portion 2 and the blocking plate 3, and when the blocking plate 4 is released, the blocking plate 3 may automatically bounce by the spacer 31, so that the remaining chalk 7 may be taken out and replaced with a new chalk 7.

Further, the surface of the shield 5 has a plurality of third grooves 52.

In this embodiment, the third groove 52 can increase the friction between the hand and the cover 5, so that the chalk 7 can be held more stably and does not easily slip on the ground.

Further, the chalk sleeve comprises an extension rod 6, and the extension rod 6 is fixedly connected with the blocking piece 4 and is positioned in the first through hole 11.

In the embodiment, the extension rod 6 extends out of the first through hole 11, so that the movement of the baffle 4 to press the chalk 7 can be controlled by the extension rod 6 more easily in use.

The utility model discloses a theory of operation and use flow: referring to fig. 1 and 2, after the present invention is installed,

the baffle plate 3 is rotated towards the direction of the limiting piece 14, chalk 7 is put in from the first through hole 11, then the extension rod 6 is pulled to pull the blocking piece 4 open, then the baffle plate 3 is closed, the blocking piece 4 returns to the original position under the action of the spring 42 to fix the baffle plate 3, after the chalk 7 is used for a certain length, the protective cover 5 is rotated to expose the unused part of the chalk 7, writing is continued, after all parts outside the clamping part 2 are used up, the extension rod 6 is pulled again, the baffle plate 3 bounces up under the action of the gasket 31, and the rest chalk 7 is taken out, so that the next chalk 7 is replaced.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. A chalk sleeve is characterized in that,

2. The chalk holder of claim 1,

3. The chalk holder of claim 1,

4. The chalk holder of claim 1,

the protective cover is provided with a rubber ring, and the rubber ring is positioned on one side, away from the clamping part, of the protective cover and encloses chalk.

5. The chalk holder of claim 4,

the shroud surface has a plurality of third grooves.

6. The chalk holder of claim 1,

the baffle is provided with a gasket, and the gasket is positioned on one side, close to the chalk, of the separation blade.

7. The chalk holder of claim 1,

the chalk sleeve comprises an extension rod, and the extension rod is fixedly connected with the blocking piece and is positioned in the first through hole.