CN210680178U

CN210680178U - Novel chalk clamping device

Info

Publication number: CN210680178U
Application number: CN201921099173.8U
Authority: CN
Inventors: 邹瑞奇
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-13
Filing date: 2019-07-13
Publication date: 2020-06-05
Anticipated expiration: 2029-07-13

Abstract

The utility model belongs to the technical field of the clamping device technique and specifically relates to an with novel chalk clamping device, including handheld section of thick bamboo, a centre gripping section of thick bamboo, threaded rod, adjust knob, the joint ring of fixedly connected with arc evagination on the upper end outer wall of a handheld section of thick bamboo, the inner wall bilateral symmetry of a handheld section of thick bamboo is equipped with the sliding tray, fixedly connected with and joint ring assorted joint section of thick bamboo on adjust knob's the lower extreme anchor ring, the rotatable lock joint of a joint section of thick bamboo is in the upper end of a handheld section of thick bamboo, the fixedly connected with threaded rod of upper end. The utility model has the advantages of reasonable design, convenience simple to use through fixing chalk upper end centre gripping in a centre gripping section of thick bamboo, and the chalk lower extreme exposes the rubber tighrening ring, can make things convenient for the chalk to hand and prevent the chalk rupture, can make a centre gripping section of thick bamboo move down gradually through adjust knob's rotation, can make the chalk expose gradually and write the use, can make the use of chalk maximum length, reduce extravagantly.

Description

Novel chalk clamping device

Technical Field

The utility model belongs to the technical field of clamping device technique and specifically relates to an use novel chalk clamping device.

Background

The chalk has the functions of writing, drawing and painting on the blackboard, and is convenient for teachers to demonstrate and teach on the blackboard by writing and writing, and has the function of spreading knowledge, the main components of the chalk are calcium carbonate (limestone) and calcium sulfate (gypsum) or contain a small amount of calcium oxide, the standard length of the chalk is 10.5cm in national standard, the chalk is short and loose in texture, the chalk can be broken by the teacher with a little strength when the teacher writes on the blackboard, the chalk can be gradually shortened after the teacher holds the chalk on the blackboard, the chalk is inconvenient to hold after being short and short, the chalk is inconvenient to hold when the length of the chalk head is usually about 4cm, so that the remaining chalk head can only be discarded to cause great waste, and meanwhile, the chalk is easy to break, two pen points can be left after the chalk is broken into two sections of chalk which is used to further cause waste, therefore, the traditional teaching uses the blackboard and the chalk to demonstrate and teach, the chalk consumption is very big, uses remaining chalk end to cause a large amount of wastes.

In summary, the technical problem to be solved by the technical solution is: the chalk is inconvenient to operate and easy to break in the hand-holding process, and the chalk head is too long to remain and waste.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the technical defect and providing a novel chalk clamping device. The chalk clamping device is simple and convenient to use, the upper end of the chalk is clamped and fixed in the clamping cylinder, the lower end of the chalk is exposed out of the rubber fastening ring, the chalk can be conveniently held by a hand to prevent the chalk from being broken, the clamping cylinder can be gradually moved downwards through rotation of the adjusting knob, the chalk can be gradually exposed for writing, the use of the maximum length of the chalk can be realized, and waste is reduced.

The utility model provides a technical scheme that technical problem adopted does: a novel chalk clamping device comprises a handheld barrel, a clamping barrel, a threaded rod and an adjusting knob, wherein a rubber fastening ring is fixedly connected at the lower end barrel opening of the handheld barrel, the lower end of the rubber fastening ring is rounded and the inner wall of the rubber fastening ring protrudes inwards in an arc shape, the lower end of a chalk can be fastened by the rubber fastening ring to prevent the chalk from being broken when in use, an arc-shaped convex clamping ring is fixedly connected on the outer wall of the upper end of the handheld barrel, sliding grooves are symmetrically formed in two sides of the inner wall of the handheld barrel, a clamping barrel matched with the clamping ring is fixedly connected on the ring surface of the lower end of the adjusting knob, the clamping barrel is rotatably fastened at the upper end of the handheld barrel, a threaded hole is formed in the middle of the adjusting knob, the clamping barrel is firmly fastened with the clamping ring and can rotate freely, the adjusting knob can rotate, the adjustable threaded rod can move up and down, the clamping barrel can move up and down, the chalk upper end can be pegged graft in a centre gripping section of thick bamboo to locking through the locking bolt of both sides is fixed, and a centre gripping section of thick bamboo activity is pegged graft in handheld section of thick bamboo and the locking bolt of its both sides slides and pegs graft in the sliding tray, and the upper end center department fixedly connected with threaded rod of a centre gripping section of thick bamboo, threaded rod spiro union are fixed in adjust knob's threaded hole, the section of thick bamboo internal depth of a centre gripping section of thick bamboo is 0.5cm, and the width of rubber tighrening ring is 0.3 cm. The remaining maximum length of the chalk end is 0.8cm, the length of the chalk end is greatly shortened compared with that of a chalk end which is directly held by hands, waste is reduced, when the chalk is replaced, a threaded rod can be held by hands to directly write, the remaining maximum length of the chalk end is reduced to 0.5cm, waste is greatly reduced, the locking bolt is inserted into the sliding groove in a sliding mode, the clamping cylinder cannot rotate when the adjusting knob rotates, the threaded rod moves downwards in the threaded hole, the clamping cylinder moves downwards, the chalk is exposed out of the rubber fastening ring at the lower end, and the chalk holder is simple and convenient to use.

The outer wall of the handheld cylinder is fixedly sleeved with a rubber anti-slip sleeve. But rubber antiskid cover antiskid abrasionproof, the handheld of being convenient for, the travelling comfort is higher.

The handheld cylinder, the clamping cylinder, the threaded rod and the adjusting knob are all made of ABS plastic materials. The ABS plastic has the advantages of good comprehensive performance, high impact strength and low cost.

The utility model discloses the beneficial effect who has is: the utility model has the advantages of reasonable design, convenience simple to use through fixing chalk upper end centre gripping in a centre gripping section of thick bamboo, and the chalk lower extreme exposes the rubber tighrening ring, can make things convenient for the chalk to hand and prevent the chalk rupture, can make a centre gripping section of thick bamboo move down gradually through adjust knob's rotation, can make the chalk expose gradually and write the use, can make the use of chalk maximum length, reduce extravagantly.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of the present invention.

Fig. 2 is a schematic structural diagram of the upper end of the handheld cylinder of the present invention.

Detailed Description

The present invention will be described in detail below with reference to fig. 1 and 2.

As shown in figures 1 and 2, the utility model comprises a hand-held cylinder 1, a clamping cylinder 5, a threaded rod 10 and an adjusting knob 9, wherein a rubber fastening ring 3 is fixedly connected at the lower end opening of the hand-held cylinder 1, the lower end of the rubber fastening ring 3 is rounded and the inner wall of the rubber fastening ring is inwards arc-shaped and convex, the rubber fastening ring 3 can fasten the lower end of a chalk to prevent the chalk from being broken when in use, an arc-shaped and convex clamping ring 7 is fixedly connected on the outer wall of the upper end of the hand-held cylinder 1, sliding grooves 4 are symmetrically arranged at two sides of the inner wall of the hand-held cylinder 1, a clamping cylinder 8 matched with the clamping ring 7 is fixedly connected on the lower end ring surface of the adjusting knob 9, the clamping cylinder 8 can be rotatably fastened at the upper end of the hand-held cylinder 1, a threaded hole 11 is arranged in the middle part of the adjusting knob 9, the clamping cylinder 8 is firmly fastened with, the clamping cylinder 5 is enabled to move up and down along with the chalk, the upper end of an opening at the lower end of the clamping cylinder 5 is closed, the two sides of the lower end of the outer wall of the clamping cylinder 5 are fixedly connected with locking bolts 6 in a threaded mode, the upper end of the chalk can be inserted into the clamping cylinder 5 and is locked and fixed through the locking bolts 6 at the two sides, the clamping cylinder 5 is movably inserted into the handheld cylinder 1, the locking bolts 6 at the two sides of the clamping cylinder 5 are inserted into the sliding groove 4 in a sliding mode, a threaded rod 10 is fixedly connected to the center of the upper end of the clamping cylinder 5, the threaded rod 10 is fixedly connected into a threaded hole 11 of an adjusting knob 9 in a threaded mode, the depth inside the clamping cylinder. The remaining maximum length of chalk end is 0.8cm, compare and directly hold the chalk and write remaining chalk end length greatly and shorten, the waste has been reduced, and when changing the chalk, also can hold threaded rod 10, directly write, make chalk end remaining maximum length reduce to 0.5cm, the waste reduces greatly, locking bolt 6 slides and pegs graft in sliding tray 4, can make clamping cylinder 5 can not rotate when adjust knob 9 rotates, make threaded rod 10 move down in screw hole 11, thereby make clamping cylinder 5 move down, make the chalk expose in the rubber fastening ring 3 of lower extreme, and is simple to use and convenient.

In this embodiment, the outer wall of the handheld barrel 1 is fixedly sleeved with a rubber anti-slip sleeve 2. But rubber antiskid cover 2 antiskid abrasionproof, the handheld of being convenient for, the travelling comfort is higher.

In this embodiment, the handheld cylinder 1, the clamping cylinder 5, the threaded rod 10 and the adjusting knob 9 are all made of ABS plastic materials. The ABS plastic has the advantages of good comprehensive performance, high impact strength and low cost.

During the use, can insert the chalk upper end in the clamping cylinder 5 and lock fixedly through locking bolt 6, the joint section of thick bamboo 8 lock joint of adjusting knob 9 lower extreme is in the upper end of handheld section of thick bamboo 1, rotate adjusting knob 9, make the lower extreme of chalk expose from the rubber tighrening ring 3 in, can write after the chalk lower extreme exposes 1cm, prevent that the chalk from exposing easy rupture when using overlength, can rotate adjusting knob 9 when exposing the overlength after the chalk is used, make the chalk lower extreme expose again from the rubber tighrening ring 3 in and continue writing, until clamping cylinder 5 lower extreme contacts rubber tighrening ring 3, can take off joint section of thick bamboo 8 of adjusting knob 9 from the upper end of handheld section of thick bamboo 1, change the chalk, then continue to use and hold and write.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a with novel chalk clamping device, includes handheld a section of thick bamboo, a centre gripping section of thick bamboo, threaded rod, adjust knob, its characterized in that: a rubber fastening ring is fixedly connected at the lower end opening of the handheld cylinder, the lower end of the rubber fastening ring is rounded, the inner wall of the rubber fastening ring is inwards arc-shaped and protruded, an arc-shaped convex clamping ring is fixedly connected on the outer wall of the upper end of the handheld cylinder, sliding grooves are symmetrically arranged on two sides of the inner wall of the handheld cylinder, a clamping cylinder matched with the clamping ring is fixedly connected on the ring surface of the lower end of the adjusting knob, the clamping cylinder can be rotationally fastened at the upper end of the handheld cylinder, a threaded hole is arranged in the middle of the adjusting knob, the upper end of the opening at the lower end of the clamping cylinder is closed, the two sides of the lower end of the outer wall of the clamping cylinder are fixedly connected with locking bolts in a threaded manner, the clamping cylinder is movably inserted in the handheld cylinder, the locking bolts at the two sides of the clamping cylinder are slidably inserted in the sliding grooves, the center of the upper end of the clamping cylinder is fixedly connected with a threaded rod, the threaded rod is fixedly connected in a threaded hole of the adjusting knob in a threaded manner, the depth of the clamping cylinder is 0.5cm, and the width of the rubber fastening ring is 0.3 cm.

2. A novel chalk holding device as defined in claim 1, wherein: the outer wall of the handheld cylinder is fixedly sleeved with a rubber anti-slip sleeve.

3. A novel chalk holding device as defined in claim 1, wherein: the handheld cylinder, the clamping cylinder, the threaded rod and the adjusting knob are all made of ABS plastic materials.