CN211617192U

CN211617192U - Adjustable chalk support

Info

Publication number: CN211617192U
Application number: CN201922062585.0U
Authority: CN
Inventors: 周义翔
Original assignee: Yongchun County Yixiang Technology Consulting Co ltd
Current assignee: Yongchun County Yixiang Technology Consulting Co ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-10-02
Anticipated expiration: 2029-11-26

Abstract

The utility model discloses an adjustable chalk support, generally only chalk box to traditional chalk support, teacher has used up and has directly lost the chalk box after the chalk, let the chalk rupture be unfavorable for the rational use easily, and the chalk dust is easy to fly upward polluted environment, the scheme as follows is proposed now, base and chalk cover, the base is located the bottom of chalk cover, two sliders of the bottom fixedly connected with of chalk cover, the spout has been seted up along its circumference in the base top, and slider slidable mounting is in the inside of spout, the left side inner wall fixedly connected with protection casing of chalk cover, the top inner wall of protection casing rotates and is connected with the screw rod that sets up along vertical direction, screw rod outer lane thread bush is equipped with places the board. The utility model discloses novel structure and convenient to use can place the chalk stably in different occasions, can reduce the dust to a certain extent, prevents that the environment from being polluted, can suitably reduce the probability of chalk rupture moreover and let the live time of chalk lengthen.

Description

Adjustable chalk support

Technical Field

The utility model relates to a teaching aid field especially relates to an adjustable chalk support.

Background

Teachers often need to write and draw on blackboards for explanation. The chalk is erased and written for several times in a class of 45-50 minutes, and a layer of white chalk dust is usually left on hands, sleeves, hair and shoulders when the chalk is used for class. Every day, every year, and after working for 20-30 years, tens of thousands of chalks are worn. Some chalk dust is inevitably inhaled from the nostrils. Whether the chalk dust is pathogenic or not is also a concern for vast teachers. The existing chalk is collected in the chalk box collectively after being used, the chalk is easy to break, the dust of the chalk can fly with the wind, the environment is polluted, the human health is harmful, and the chalk cannot be placed stably.

SUMMERY OF THE UTILITY MODEL

The utility model provides an adjustable chalk support has solved traditional chalk support and has generally only chalk box, and in teacher's used the chalk directly lost the chalk box after, let the chalk rupture be unfavorable for the rational use easily, the chalk dust is easy to fly upward the problem of polluted environment moreover.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an adjustable chalk support, includes base and chalk cover, the base is located the bottom of chalk cover, two sliders of the bottom fixedly connected with of chalk cover, the spout has been seted up along its circumference in the base top, and slider slidable mounting is in the inside of spout, the left side inner wall fixedly connected with protection casing of chalk cover, the top inner wall of protection casing rotates and is connected with the screw rod that sets up along vertical direction, the outer lane thread bush of screw rod is equipped with places the board, and places the right side housing that the board runs through the protection casing, the first bevel gear of bottom fixedly connected with of screw rod, the top fixedly connected with fixed axle of base, the fixed cover in outer lane of fixed axle is equipped with second bevel gear, and second bevel gear and first bevel gear meshing transmission.

Preferably, the right side housing of the protection cover is provided with a through hole along the height direction thereof, and the placing plate penetrates through the through hole.

Preferably, the top end of the screw rod is fixedly sleeved with a bearing, and the bearing is connected with the inner wall of the top of the protective cover through a bolt.

Preferably, the inner wall of protection casing and chalk cover constitutes installation cavity and places the chamber, and the screw rod is located the inside of installation cavity, the inside of placing the chamber is provided with the chalk.

Preferably, the vertical sections of the sliding groove and the sliding block are L-shaped structures, the right side housing of the protective cover is provided with an arc surface, and the outer ring of the base is provided with anti-skid lines.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model adopts the structure of the installation base, the chalk sleeve, the two sliding blocks, the placing plate, the screw rod, the bevel gear, the through hole, the sliding block, the fixed shaft and the like, by rotating the base, the second bevel gear sleeved on the fixed shaft drives the first bevel gear to rotate through meshing transmission, the first bevel gear drives the screw rod, the screw rod rotates to enable the placing plate to ascend, and then the messenger places the chalk of placing the board and rises, the protection casing constitutes the installation cavity with the inner wall of chalk cover and places the chamber, installation elevating gear in the installation cavity, place the intracavity and place the chalk, can effectual separation chalk and work interval, prevent that the garrulous end of chalk from dropping to make the chalk seat normally work in the installation cavity, the chalk of placing the intracavity can effectually restrain the dust and fly away, prevent that the environment from being polluted and also can effectually prevent that the chalk from being broken makes the live time extension of chalk, increase the utilization ratio of article.

Drawings

Fig. 1 is a schematic front view of an adjustable chalk holder according to the present invention;

fig. 2 is a schematic top view of an adjustable chalk holder according to the present invention;

fig. 3 is the utility model provides an overlook schematic structure of board is placed to adjustable chalk support.

Fig. 4 is the utility model provides an overlook schematic structure of adjustable chalk support protection casing and through-hole contact position.

In the figure: the chalk holder comprises a base 1, a first bevel gear 2, a chalk sleeve 3, a screw rod 4, a through hole 5, a placing plate 6, a second bevel gear 7, a fixed shaft 8, a bearing 9, a sliding groove 10, a sliding block 11 and a protective cover 12.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-4, an adjustable chalk support comprises a base 1 and a chalk sleeve 3, wherein the base 1 is located at the bottom of the chalk sleeve 3, two sliding blocks 11 are fixedly connected to the bottom of the chalk sleeve 3, a sliding groove 10 is formed in the top of the base 1 along the circumferential direction of the base, the sliding blocks 11 are slidably mounted inside the sliding groove 10, a protective cover 12 is fixedly connected to the inner wall of the left side of the chalk sleeve 3, a screw rod 4 which is arranged along the vertical direction is rotatably connected to the inner wall of the top of the protective cover 12, a placing plate 6 is sleeved on the outer ring of the screw rod 4 in a threaded manner, the placing plate 6 penetrates through a right side housing of the protective cover 12, a first bevel gear 2 is fixedly connected to the bottom of the screw rod 4, a fixing shaft 8 is fixedly connected to the top of the base 1.

In this embodiment, the right side housing of the protection cover 12 is provided with a through hole 5 along the height direction thereof, and the placing plate 6 penetrates the through hole 5.

In this embodiment, the top end of the screw rod 4 is fixedly sleeved with the bearing 9, and the bearing 9 is connected with the inner wall of the top of the protective cover 12 through a bolt.

In this embodiment, the protective cover 12 and the inner wall of the chalk sleeve 3 form an installation cavity and a placing cavity, the screw rod 4 is located inside the installation cavity, and chalk is arranged inside the placing cavity.

In this embodiment, the vertical cross-sections of the sliding groove 10 and the sliding block 11 are both L-shaped structures, the right side housing of the protective cover 12 is provided with an arc surface, and the outer ring of the base 1 is provided with anti-slip lines.

The working principle is that firstly, a base 1 is positioned at the bottom of a chalk sleeve 3, two sliding blocks 11 are fixedly connected at the bottom of the chalk sleeve 3, a sliding groove 10 is arranged at the top of the base 1 along the circumferential direction, the sliding blocks 11 are slidably arranged in the sliding groove 10, a protective cover 12 is fixedly connected at the left inner wall of the chalk sleeve 3, a screw rod 4 arranged along the vertical direction is rotatably connected at the top inner wall of the protective cover 12, a placing plate 6 is sleeved at the outer ring thread of the screw rod 4, the placing plate 6 penetrates through a right housing of the protective cover 12, a first bevel gear 2 is fixedly connected at the bottom end of the screw rod 4, a fixed shaft 8 is fixedly connected at the top end of the base 1, a second bevel gear 7 is fixedly sleeved at the outer ring of the fixed shaft 8, the second bevel gear 7 is in meshing transmission with the first bevel gear 2, the, the screw rod rotates to enable the placing plate to ascend, and then the chalk placed on the placing plate ascends and is adjusted according to the field use condition.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The adjustable chalk support comprises a base (1) and a chalk sleeve (3) and is characterized in that the base (1) is located at the bottom of the chalk sleeve (3), two sliding blocks (11) are fixedly connected to the bottom of the chalk sleeve (3), a sliding groove (10) is formed in the top of the base (1) along the circumferential direction of the base, the sliding blocks (11) are slidably mounted inside the sliding groove (10), a protective cover (12) is fixedly connected to the inner wall of the left side of the chalk sleeve (3), a screw rod (4) arranged in the vertical direction is rotatably connected to the inner wall of the top of the protective cover (12), a placing plate (6) is sleeved on the outer ring of the screw rod (4) in a threaded manner, the placing plate (6) penetrates through a right side housing of the protective cover (12), a first bevel gear (2) is fixedly connected to the bottom end of the screw rod (4), a fixing shaft (8) is fixedly connected, and the outer ring of the fixed shaft (8) is fixedly sleeved with a second bevel gear (7), and the second bevel gear (7) is in meshing transmission with the first bevel gear (2).

2. The adjustable chalk holder is characterized in that a through hole (5) is formed in the right side cover shell of the protective cover (12) in the height direction, and the placing plate (6) penetrates through the through hole (5).

3. The adjustable chalk holder as claimed in claim 1, wherein a bearing (9) is fixedly sleeved on the top end of the screw rod (4), and the bearing (9) is connected with the top inner wall of the protective cover (12) through a bolt.

4. The adjustable chalk support according to claim 1, characterized in that the protective cover (12) and the inner wall of the chalk sleeve (3) form a mounting cavity and a placing cavity, the screw rod (4) is located inside the mounting cavity, and chalk is arranged inside the placing cavity.

5. The adjustable chalk support according to claim 1, wherein the vertical sections of the sliding groove (10) and the sliding block (11) are both L-shaped structures, the right side cover of the protective cover (12) is provided with a cambered surface, and the outer ring of the base (1) is provided with anti-skidding lines.