CN210257752U

CN210257752U - Chalk holder

Info

Publication number: CN210257752U
Application number: CN201921136376.XU
Authority: CN
Inventors: 顾泽藤; 钱海英
Original assignee: Zhejiang Industry Polytechnic College
Current assignee: Zhejiang Industry Polytechnic College
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-04-07
Anticipated expiration: 2029-07-19

Abstract

The utility model relates to the technical field of teaching aids, in particular to a chalk clip, which comprises a shell, a base and a rear cover, wherein two strip-shaped grooves are symmetrically arranged on the side wall of the shell along the length direction respectively, and one long edge of each strip-shaped groove is provided with a rack; the base is arranged in the shell and used for fixing the chalk, gears are symmetrically arranged on two sides of the base respectively, the gears penetrate through the strip-shaped grooves and are meshed with the racks, and knobs are arranged on the outer sides of the gears. The utility model discloses with the chalk installation in the shell, avoid chalk and hand contact to the protection chalk is not broken, but the extension length of accurate control chalk through the cooperation of gear and rack in addition guarantees to write the comfort of feeling.

Description

Chalk holder

Technical Field

The utility model relates to a teaching aid technical field, concretely relates to chalk clip.

Background

The chalk is used as a widely used teaching aid, fingers are easily polluted when the chalk is used, the chalk is easy to break, the chalk broken into small sections and small sections is difficult to continue to use, and endless waste and redundant garbage are caused. Moreover, teachers sometimes need to mark emphasis on the blackboard during teaching, and replacement of another color chalk is troublesome.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a chalk clip aims at solving the problem among the prior art that above-mentioned background art provided.

The above technical problem of the present invention can be solved by the following technical solutions: a chalk clip comprises a shell, a base and a rear cover; the chalk box comprises a shell, a chalk box body, a rear cover, a rack, a chalk box body, a chalk box cover and a chalk box cover, wherein one end of the shell is provided with a hole for the chalk to pass through, the other end of the shell is connected with the rear cover, two strip-shaped grooves are symmetrically formed in the side wall of the shell along the length direction respectively, the tail ends of the strip; the base is arranged in the shell and used for fixing the chalk, one end of the base is provided with a clamping jaw, the other end of the base is provided with an adjusting rotary rod penetrating through the end part of the base, and an adjusting nut is arranged on the adjusting rotary rod; the both sides of base symmetry respectively are equipped with the gear, the gear runs through to be located the bar inslot and with rack toothing, the outside of gear is equipped with the knob.

In the structure, the chalk is fixed in the base, and the position of the chalk in the shell can be adjusted by rotating the knob to drive the gear to rotate on the rack, so that the length of the chalk extending out of the shell is adjusted; when the chalk is written, the adjusting rotary rod can be pushed by rotating the adjusting nut, so that extra extending distance of the chalk is increased, and the chalk is utilized to the maximum extent when being used.

The further arrangement is that the tail part of the shell is provided with a clamping tenon interface, the rear cover is provided with a clamping tenon matched with the clamping tenon interface, and the shell is connected with the rear cover through the clamping tenon.

The chalk clamp is further arranged in that the inner side of the clamping jaw, which is in contact with the chalk, is provided with anti-skidding lines, so that the chalk is prevented from slipping off during writing.

The further setting lies in, the shell is kept away from the one end of back lid and is equipped with the nib, conveniently writes.

The chalk is further arranged in that the pencil head is conical, and a hole is formed in the middle of the pencil head for the chalk to penetrate through.

The pen is further provided with magnets at the front end of the shell and on the pen point, and the shell is connected with the pen point through the magnets in an adsorption mode.

The chalk clip is characterized in that a magnet is arranged on the outer side of the rear cover, on one hand, the chalk clip can adsorb two chalk clips with different colors together, so that different colors can be replaced conveniently during writing, and on the other hand, the chalk clips or laser pens with the same specification can be connected to the outer side of the rear cover.

The further arrangement is that the rear cover is provided with a through hole.

The blackboard eraser is further provided with a bar-shaped magnet arranged on the side wall of the shell and used for adsorbing the chalk clip on the blackboard.

Compared with the prior art, the utility model, its advantage lies in:

1. the chalk clip provided by the utility model separates the hand from the chalk when in use, thereby ensuring the cleanness of both hands of a writer and protecting the chalk from being easily broken or broken; in addition, the utility model discloses can furthest take the utilization to the chalk, avoid causing the waste.

2. The utility model discloses a cooperation of gear and rack can accurately control the extension length of chalk, guarantees to write the comfortable of feeling to conveniently replace new chalk.

3. The utility model discloses a magnetite adsorbs the connection, can two or many adsorb and connect the used jointly, and convenient the dismantlement can change the chalk of multiple colour fast conveniently to can be at the chalk eraser or the laser pen of the same specification of end connection.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram of the middle housing of the present invention.

Fig. 3 is another schematic structural diagram of the housing of the present invention.

Fig. 4 is a schematic structural diagram of the base of the present invention.

Fig. 5 is a schematic structural diagram of the middle base (without chalk) of the present invention.

Fig. 6 is a schematic structural view of the middle and rear covers of the present invention.

Fig. 7 is a schematic structural view of the pen tip of the present invention.

In the figure: 1. a housing; 2. a base; 3. a rear cover; 4. a pen point; 5. chalk; 6. a strip-shaped groove; 7. a rack; 8. a gear; 9. a knob; 10. adjusting the rotary rod; 11. adjusting the nut; 12. a claw; 13. anti-skid lines; 14. a tenon joint; 15. a tenon is clamped; 16. a magnet; 17. a bar magnet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further specifically described below by way of embodiments and with reference to the accompanying drawings.

Example (b): a chalk clip is disclosed, as shown in fig. 1-7, comprising a casing 1, a base 2, a rear cover 3 and a chalk end 4, wherein the casing 1 is a hexagonal prism-shaped shell, the chalk end 4 and the rear cover 3 are respectively arranged at two ends of the casing, and the base 2 is arranged in the casing 1 and used for fixing chalk 5.

One end of the shell 1 connected with the pen point 4 is provided with a hole for chalk 5 to pass through; two strip-shaped grooves 6 are symmetrically formed in the side wall of the shell 1 along the length direction, the tail portions of the strip-shaped grooves 6 extend to the tail portion of the shell 1, and a rack 7 is arranged on one long side of each strip-shaped groove 6; in addition, a bar magnet 17 is arranged on the side wall of the shell 1, so that the chalk clip can be conveniently adsorbed on the blackboard.

One end of the base 2 is provided with a clamping jaw 12, when the chalk 5 is arranged in the clamping jaw 12, the clamping jaw 12 fixes the chalk 5 due to the elasticity of the material, and the inner side of the clamping jaw 12 is provided with an anti-skidding line 13 to prevent the chalk from slipping; the other end of the base 2 is provided with an adjusting rotary rod 10 penetrating through the end part of the base 2, an adjusting nut 11 is arranged on the adjusting rotary rod 10, and the adjusting rotary rod 10 can be pushed to be propped against the tail end of the chalk 5 by rotating the adjusting nut 11 when the chalk holder is used; the both sides of base 2 are the symmetry respectively and are equipped with gear 8, and gear 8 runs through respectively to be located two bar grooves 6 in and with rack 7 meshing, and the outside of gear 8 is equipped with knob 9, when rotating knob 9 and driving gear 8 and rotate, can drive base 2 back-and-forth movement in shell 1 to adjust the length that the chalk 5 of fixing stretches out shell 1 on base 2.

For writing, the pen head 4 is conical, and a hole is formed in the middle of the pen head for allowing chalk 5 to pass through; the front end of the shell 1 and the pen point 4 are respectively provided with a magnet 16, and the front end and the pen point are connected in an adsorption mode through the magnets 16, so that the pen is convenient to detach.

The rear cover 3 is provided with a clamping tenon 15, the tail part of the shell 1 is provided with a clamping tenon interface 14 matched with the clamping tenon 15, and the rear cover 3 can be covered on the tail part of the shell 1 by inserting the clamping tenon 15 into the clamping tenon interface 14; the magnet 16 is arranged on the outer side of the rear cover 3, the through hole is formed in the rear cover 3, the pen point of the other chalk clip filled with chalks with different colors is detached, the two chalk clips can be attached together end to end, when a writer needs to replace chalks with different colors for writing, the writer only needs to detach the pen point 4 of the previous section, connect the tail of the next section to the head of the previous section, and then connect the pen point 4 to the head of the next section. When the chalks with various colors are required to be replaced, a plurality of sections of chalk clips are connected to the tail of the front section; in addition, a chalk eraser or a laser pen with the same specification can be attached to the back cover 3 through a magnet.

In the specific implementation of the embodiment, firstly, the rear cover 3 is pulled out, the base 2 is withdrawn from the tail part of the shell 1 in a transmission mode of the gear 8 and the rack 7 through rotating the knob 9, the chalk 5 is inserted into the base 2, the adjusting nut 11 is rotated, the end part of the adjusting rotary rod 10 is abutted against the bottom of the chalk 5, and at the moment, the clamping jaws 12 of the base 2 can fix the chalk 5 due to the elasticity of the material; then the base 2 is put into the shell 1 from the tail part of the shell 1, the base 2 enters the shell 1 in a way of driving the gear 8 and the rack 7 by rotating the knob 9, then the rear cover 3 is put on, and the rear cover 3 is connected with the shell 1 by the tenon 15; the position of the chalk 5 in the housing 1 can be adjusted by the adjusting knob 9, so that the length of the chalk 5 extending out of the housing 1 can be adjusted. When the chalk 5 is written up, the base 2 can be taken out, the adjusting rotary rod 10 is pushed by rotating the adjusting nut 11, and the chalk 5 can be extended by an extra distance, so that the purpose of utilizing the chalk 5 to the maximum extent is achieved, and waste is avoided.

Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above-described embodiments, and many modifications are possible. All changes and modifications that may be made by the technical spirit of the present invention to the above embodiments by simple modification are considered to fall within the scope of the present invention.

Claims

1. A chalk clip is characterized in that: comprises a shell, a base and a rear cover; the chalk box comprises a shell, a chalk box body, a rear cover, a rack, a chalk box body, a chalk box cover and a chalk box cover, wherein one end of the shell is provided with a hole for the chalk to pass through, the other end of the shell is connected with the rear cover, two strip-shaped grooves are symmetrically formed in the side wall of the shell along the length direction respectively, the tail ends of the strip; the base is arranged in the shell and used for fixing the chalk, one end of the base is provided with a clamping jaw, the other end of the base is provided with an adjusting rotary rod penetrating through the end part of the base, and an adjusting nut is arranged on the adjusting rotary rod; the both sides of base symmetry respectively are equipped with the gear, the gear runs through to be located the bar inslot and with rack toothing, the outside of gear is equipped with the knob.

2. A chalk clip according to claim 1, characterized in that: the tail of the shell is provided with a clamping tenon interface, the rear cover is provided with a clamping tenon matched with the clamping tenon interface, and the shell is connected with the rear cover through the clamping tenon.

3. A chalk clip according to claim 1, characterized in that: and anti-skidding lines are arranged on the inner sides of the clamping jaws, which are in contact with the chalk.

4. A chalk clip according to claim 1, characterized in that: and a pen point is arranged at one end of the shell, which is far away from the rear cover.

5. A chalk clip according to claim 4, characterized in that: the pen point is conical, and a hole is formed in the middle of the pen point for the chalk to penetrate through.

6. A chalk clip according to claim 4 or 5, characterized in that: the front end of the shell and the pen point are respectively provided with a magnet, and the shell and the pen point are connected in an adsorption mode through the magnets.

7. A chalk clip according to claim 6, characterized in that: and a magnet is arranged on the outer side of the rear cover.

8. A chalk clip according to claim 7, characterized in that: the rear cover is provided with a through hole.

9. A chalk clip according to claim 1, characterized in that: and a bar magnet is arranged on the side wall of the shell.