CN211617193U

CN211617193U - Chalk holder for teaching

Info

Publication number: CN211617193U
Application number: CN201922277937.4U
Authority: CN
Inventors: 林亮; 赖晓琴; 李晶蕊; 林静
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-10-02
Anticipated expiration: 2029-12-18

Abstract

The utility model relates to a teaching technical field discloses a chalk clamp is used in teaching, including one end open-ended sleeve pipe, threaded hole has been seted up at the bottom of the sheathed tube, threaded hole female connection has the threaded rod, the screw hole is passed and outside extension at the both ends of threaded rod, the intraductal transmission post that is equipped with of cover, the one end that the transmission post is close to the threaded rod is inlayed and is had the bearing, the one end that the threaded rod is close to the transmission post extends to the inner circle of bearing, and the threaded rod is connected with the inner circle wall of bearing mutually, the intercommunication has one end open-ended storage pipe on the sheathed tube pipe wall, the mouth of pipe intercommunication sheathed tube pipe wall setting of storage pipe, there is the clamp plate through spring coupling at the bottom of the sheathed tube inner tube, clamp plate sliding connection. The utility model discloses once load after many chalks, need not to reload once more, avoided the waste of teaching time, avoided the hand to be infected with the chalk dust moreover.

Description

Chalk holder for teaching

Technical Field

The utility model relates to a teaching technical field especially relates to a chalk clip is used in teaching.

Background

The chalk is composed of calcium sulfate white precipitate, is not easy to decompose, has larger particles than dust, is generally used for writing on a blackboard in teaching, is mostly common chalk, is easy to scatter when the common chalk is used, is directly written by taking the chalk with hands, is easy to pollute the chalk dust by fingers, and is a hidden danger for personal hygiene and personal skin health.

The retrieved public (announcement) number CN208232645U discloses a chalk clip for mathematical education, which can improve the chalk utilization rate, effectively avoid the direct contact between hands and the chalk, protect fingers and skin and conveniently adjust the length of the chalk outside a sleeve when in use; the proposal still has the following technical defects:

only one piece of chalk exists in the sleeve each time, and the chalk needs to be refilled after each use, so that the hands can be stained with chalk dust, and teaching time can be wasted.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that in the prior art, only one chalk exists in the sleeve at every turn, and each chalk needs to be reloaded after being used, so that not only can the hand be stained with the chalk dust, but also the teaching time can be wasted, and the provided chalk clamp for teaching is provided.

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

a chalk clamp for teaching comprises a sleeve with an opening at one end, a threaded hole is formed in the bottom of the sleeve, a threaded rod is connected with the threaded rod in a threaded hole, the two ends of the threaded rod penetrate through the threaded hole and extend outwards, a transmission column is arranged in the sleeve, one end, close to the threaded rod, of the transmission column is embedded with a bearing, one end, close to the transmission column, of the threaded rod extends to an inner ring of the bearing, the threaded rod is connected with an inner ring wall of the bearing, a storage tube with an opening at one end is communicated with the wall of the sleeve, the tube opening of the storage tube is communicated with the wall of the sleeve, a pressing plate is connected with the bottom of the inner tube of the sleeve through a spring and is connected into the storage tube in a sliding mode, a plurality of chalks are arranged at equal intervals in the vertical direction at one end, far away from the spring, the chalks are arranged, the other end of the pull rod penetrates through the tube bottom of the storage tube and extends out of the storage tube, and one end, located in the sleeve, of the chalk is provided with a transmission column, and the transmission column is far away from one end of the tube bottom of the sleeve.

Preferably, one end, far away from the chalk, of the threaded rod is fixedly connected with a rotating ring, and anti-skidding grains are arranged on the ring wall of the rotating ring.

Preferably, one end of the pull rod, which is far away from the pressure plate, is fixedly connected with a pull handle.

Preferably, a sealing groove is formed in the vertical side wall of the pressing plate, a sealing strip is fixedly connected to the bottom of the sealing groove, and one end, far away from the bottom of the sealing groove, of the sealing strip is arranged on the inner pipe wall of the storage pipe.

Preferably, the center of the bottom of the storage tube is provided with a through hole, the pull rod penetrates through the through hole, a plurality of balls are annularly embedded on the wall of the through hole, and the balls are connected to the rod wall of the pull rod in a rolling manner.

Preferably, a rubber strip is fixedly connected to the inner pipe wall of the casing pipe.

Compared with the prior art, the utility model provides a chalk clip is used in teaching possesses following beneficial effect:

the chalk clamp for teaching is characterized in that a sleeve, a threaded hole, a threaded rod, a transmission post, a bearing, a storage tube, a spring, a pressing plate, chalks and a pull rod are arranged, the threaded rod is rotated and is stressed to rotate in the threaded hole, the threaded rod cannot drive the transmission post to rotate through the bearing, the threaded rod drives the transmission post to move backwards, a pulling force is applied to the pull rod, the pull rod is stressed to drive the pressing plate to move in the storage tube and compress the spring, a plurality of chalks are stuffed in the sleeve, redundant chalks enter the storage tube to be stored, only one chalks are left in the sleeve, when the chalks need to be used, the threaded rod is rotated reversely, the transmission post pushes the chalks in the sleeve to move forwards, the chalks in the sleeve are pushed out of the sleeve to be used, after the chalks are used, the transmission post moves backwards, the compressed chalks in the, after a plurality of chalks are filled at one time, the chalks do not need to be refilled again, the waste of teaching time is avoided, and the hands are prevented from being stained with chalk dust.

The part that does not relate to among the device all is the same with prior art or can adopt prior art to realize, the utility model discloses once load after many chalks, need not to reload once more, avoided the waste of teaching time, avoided the hand to be infected with the chalk dust moreover.

Drawings

Fig. 1 is a schematic structural view of a teaching chalk clip of the present invention;

fig. 2 is an enlarged view of a portion a in fig. 1.

In the figure: the chalk box comprises a sleeve 1, a threaded hole 2, a threaded rod 3, a transmission column 4, a bearing 5, a storage tube 6, a spring 7, a pressing plate 8, chalk 9, a pull rod 10, a rotating ring 11, a pull handle 12, a sealing strip 13, a ball 14 and a rubber strip 15.

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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only 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 therefore, should not be construed as limiting the present invention.

Referring to fig. 1-2, a chalk clip for teaching comprises a sleeve 1 with an opening at one end, a threaded hole 2 is arranged at the bottom of the sleeve 1, a threaded rod 3 is connected with the threaded hole 2 in a threaded manner, two ends of the threaded rod 3 penetrate through the threaded hole 2 and extend outwards, a transmission column 4 is arranged in the sleeve 1, a bearing 5 is embedded at one end of the transmission column 4 close to the threaded rod 3, one end of the threaded rod 3 close to the transmission column 4 extends to the inner ring of the bearing 5, the threaded rod 3 is connected with the inner ring wall of the bearing 5, a storage tube 6 with an opening at one end is communicated with the tube wall of the sleeve 1, the tube opening of the storage tube 6 is communicated with the tube wall of the sleeve 1, a pressing plate 8 is connected with the inner bottom of the sleeve 1 through a spring 7, the pressing plate 8 is connected in the storage tube 6 in a sliding manner, a plurality of chalks 9 are uniformly arranged in, one end of the pressing plate 8 close to the spring 7 is fixedly connected with a pull rod 10, the other end of the pull rod 10 penetrates through the tube bottom of the storage tube 6 and extends out of the storage tube 6, one end of a chalk 9 positioned in the sleeve 1 is provided with a transmission column 4 and is far away from one end of the tube bottom of the sleeve 1, the threaded rod 3 is rotated, the threaded rod 3 is stressed to rotate in the threaded hole 2, the threaded rod 3 cannot drive the transmission column 4 to rotate through the bearing 5, the threaded rod 3 drives the transmission column 4 to move backwards, a pulling force is applied to the pull rod 10, the pull rod 10 drives the pressing plate 8 to move in the storage tube 6 and compress the spring 7, a plurality of chalks 9 are stuffed in the sleeve 1, redundant chalks 9 enter the storage tube 6 to be stored, only one chalk 9 is left in the sleeve 1, when the chalk 9 is needed, the threaded rod 3 is rotated reversely, so that the transmission column, the chalk 9 in the sleeve 1 is ejected out of the sleeve 1 for use, after the chalk 9 is used, the transmission column 4 moves backwards, the compressed spring 7 in the storage tube 6 presses the chalk 9 in the storage tube 6 into the sleeve 1 through the pressing plate 8, and after a plurality of chalks 9 are filled once, the chalk is not required to be refilled again, so that the waste of teaching time is avoided, and the hand is prevented from being stained with chalk dust.

One end of the threaded rod 3, which is far away from the chalk 9, is fixedly connected with a rotating ring 11, the annular wall of the rotating ring 11 is provided with anti-skidding grains, and the threaded rod 3 is conveniently driven to rotate through the rotating ring 11.

The end of the pull rod 10 far away from the pressure plate 8 is fixedly connected with a pull handle 12, and the pull handle 12 is convenient for applying pulling force to the pull rod 10.

The vertical side wall of the pressing plate 8 is provided with a sealing groove, the bottom of the sealing groove is fixedly connected with a sealing strip 13, one end, far away from the bottom of the sealing groove, of the sealing strip 13 is arranged on the inner pipe wall of the storage pipe 6, and the sealing performance between the pressing plate 8 and the storage pipe 6 is improved through the sealing strip 13.

The through-hole has been seted up in the socle center department of storage tube 6, and pull rod 10 passes the through-hole setting, is the annular on the pore wall of through-hole and inlays and have a plurality of ball 14, and ball 14 roll connection is on the pole wall of pull rod 10 for stable the motion that carries on in storage tube 6 during the pull rod 10 atress.

The rubber strip 15 is fixedly connected to the inner pipe wall of the casing 1, so that the tightness of the chalk 9 in the casing 1 is improved.

In the utility model, the threaded rod 3 is rotated, the threaded rod 3 rotates in the threaded hole 2 under stress, the threaded rod 3 can not drive the transmission post 4 to rotate through the bearing 5, the threaded rod 3 drives the transmission post 4 to move backwards, the pull rod 10 is exerted with a tensile force, the pull rod 10 drives the pressing plate 8 to move in the storage tube 6 and compress the spring 7, a plurality of chalks 9 are stuffed in the sleeve 1, the redundant chalks 9 enter the storage tube 6 to be stored, only one chalks 9 is left in the sleeve 1, when the chalks 9 need to be used, the threaded rod 3 is rotated reversely, the transmission post 4 pushes the chalks 9 in the sleeve 1 to move forwards, the chalks 9 in the sleeve 1 are pushed out of the sleeve 1 to be used, after the chalks 9 are used, the transmission post 4 moves backwards, the compressed spring 7 in the storage tube 6 presses the chalks 9 in the storage tube 6 into the sleeve 1 through the pressing plate 8, after a plurality of chalks 9 are filled at one time, the chalks do not need to be refilled again, the waste of teaching time is avoided, and the hands are prevented from being stained with chalk dust.

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 utility model provides a chalk clip for teaching, includes one end open-ended sleeve pipe (1), its characterized in that, screw hole (2) are seted up at the socle of sleeve pipe (1), screw hole (2) female connection has threaded rod (3), threaded hole (2) and outside extension are passed at the both ends of threaded rod (3), be equipped with drive post (4) in sleeve pipe (1), the one end that drive post (4) are close to threaded rod (3) is inlayed and is had bearing (5), the one end that threaded rod (3) are close to drive post (4) extends to the inner circle of bearing (5), just threaded rod (3) are connected with the inner circle wall of bearing (5), the intercommunication has one end open-ended pipe (6) on the pipe wall of sleeve pipe (1), the mouth of pipe intercommunication sleeve pipe (1) of storage pipe (6) pipe wall setting, the inner tube end of sleeve pipe (1) is connected with clamp plate (8) through spring (7), pressing plate (8) sliding connection is in storing up and storing pipe (6), the one end that spring (7) were kept away from in pressing plate (8) has a plurality of chalks (9) along the even equidistance range of vertical direction, is located one of below chalk (9) set up in sleeve pipe (1), one end fixedly connected with pull rod (10) that pressing plate (8) are close to spring (7), the other end of pull rod (10) runs through the socle of storing up pipe (6) and extends outward to storing pipe (6), is located chalk (9) one end in sleeve pipe (1) sets up drive column (4) and keeps away from socle one end of sleeve pipe (1).

2. The teaching chalk clip as claimed in claim 1, characterized in that a rotating ring (11) is fixedly connected to one end of the threaded rod (3) far away from the chalk (9), and the wall of the rotating ring (11) is provided with anti-skid lines.

3. The chalk clip for teaching according to claim 1, characterized in that a pull handle (12) is fixedly connected to one end of the pull rod (10) away from the pressing plate (8).

4. The chalk clip for teaching of claim 1, wherein a sealing groove is formed on the vertical side wall of the pressing plate (8), a sealing strip (13) is fixedly connected to the bottom of the sealing groove, and one end of the sealing strip (13) far away from the bottom of the sealing groove is arranged on the inner pipe wall of the storage pipe (6).

5. The chalk clip for teaching of claim 1, characterized in that a through hole is opened at the center of the bottom of the storage tube (6), the pull rod (10) is disposed through the through hole, a plurality of balls (14) are embedded on the wall of the through hole in a ring shape, and the balls (14) are connected to the wall of the pull rod (10) in a rolling manner.

6. An educational chalk clip according to claim 1, characterized in that a rubber strip (15) is fixedly connected to the inner tube wall of the sleeve (1).