CN211441699U

CN211441699U - Elastically locked chalk holder

Info

Publication number: CN211441699U
Application number: CN201921839329.1U
Authority: CN
Inventors: 张春岭
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-26
Filing date: 2019-10-26
Publication date: 2020-09-08
Anticipated expiration: 2029-10-26

Abstract

The utility model belongs to the technical field of the teaching aid technique and specifically relates to a chalk holder of elasticity locking, including handheld section of thick bamboo, centre gripping post, a centre gripping section of thick bamboo, spacing flexure strip, a spacing section of thick bamboo, end cover, a locking section of thick bamboo, the upper end spiro union of handheld section of thick bamboo is fixed with the end cover, fixedly connected with spacing ring on the downside outer wall of a handheld section of thick bamboo, fixedly connected with compression spring between spacing section of thick bamboo and the spacing ring, a handheld section of thick bamboo internalization cover has a centre gripping section of thick bamboo, and a locking section of thick bamboo internalization is pegged graft and is had T shape pole, and the upper end. The utility model has the advantages of reasonable design, a centre gripping section of thick bamboo inserts the rear end of fixed chalk, and the spacing flexure strip centre gripping of front end accessible of chalk is fixed, pushes down and presses the handle to make the locking plate withdraw from the restraint groove and remove the locking to can promote the reach of a centre gripping section of thick bamboo antedisplacement regulation chalk, make the chalk can not break when writing, through handheld barrel casing on a centre gripping section of thick bamboo, be convenient for hold, the hand can not the direct contact chalk.

Description

Elastically locked chalk holder

Technical Field

The utility model belongs to the technical field of teaching aid technique and specifically relates to a chalk holder of elasticity locking.

Background

At present, in most middle school teaching activities, a blackboard is still the most common teaching blackboard writing carrier, a teacher usually uses chalk to perform blackboard writing on the blackboard to give lessons and explain, the chalk is soft in texture, easy to break, inconvenient to use, influence writing efficiency and easy to cause waste, and when the chalk is directly held by hands to perform blackboard writing, chalk dust on the chalk is easy to stick to the hands, so that the blackboard writing carrier is not sanitary. To sum up, in order to solve the technical problem that the chalk is easy to break and inconvenient to hold, the utility model provides an elastic locking chalk holder.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to overcome the above-mentioned technical disadvantages and to provide a chalk holder with an elastic locking. The clamping cylinder is inserted into the rear end for fixing the chalk, the front end of the chalk can be clamped and fixed through the limiting elastic piece, the locking piece can be retracted from the constraint groove to be unlocked by pressing the pressing handle downwards, so that the clamping cylinder can be pushed to move forwards to adjust the extending length of the chalk, the chalk cannot be broken during writing, the chalk is sleeved on the clamping cylinder through the handheld cylinder, the holding is convenient, and the hand cannot directly contact the chalk.

The utility model provides a technical scheme that technical problem adopted does: an elastically locked chalk holder comprises a handheld barrel, a holding column, a holding barrel, a limiting elastic sheet, a limiting barrel, an end cover and a locking barrel, wherein the end cover is fixedly connected to the upper end of the handheld barrel in a threaded manner, a guide column is fixedly connected to the center of the inner wall of the upper side of the end cover, a buffer spring is fixedly sleeved on the guide column, a cover plate is fixedly connected to the lower end of the buffer spring, a limiting ring is fixedly connected to the outer wall of the lower side of the handheld barrel, 4 outwards-supported L-shaped limiting elastic sheets are fixedly arranged at the edge of the lower end of the handheld barrel, the limiting barrel is movably sleeved on the outer wall of the lower end of the handheld barrel, a chamfer is arranged on the inner side of the lower end of the limiting barrel, a compression spring is fixedly connected between the limiting barrel and the limiting ring, a sliding groove penetrating through the upper end of the limiting ring is formed in the outer wall of the front side of the handheld barrel on the upper side of the limiting ring, a, the lower extreme section of thick bamboo of centre gripping section of thick bamboo is along fixedly connected with rubber ring of department, the internal diameter of rubber ring is less than the internal diameter 2mm of a centre gripping section of thick bamboo, the upper end fixedly connected with centre gripping post of a centre gripping section of thick bamboo, the front side outer wall middle part of centre gripping post is equipped with the screw hole, the spiro union is fixed in the screw hole after the locking section of thick bamboo passes the sliding tray, the activity is pegged graft in the locking section of thick bamboo has T shape pole, the upper end fixedly connected with of T shape pole presses the handle, fixedly connected with reset spring between the lower extreme of T shape pole and the bobbin base inner wall of a locking section of thick bamboo, the symmetry is equipped with the locking groove on the both sides outer wall lower extreme of a locking section of thick bamboo, the both sides outer wall lower extreme of.

An elastic clamping strip is fixedly connected to the outer wall of the right side of the end cover, and a triangular clamping block is fixedly connected to the outer wall of the inner side of the lower end of the elastic clamping strip. The elastic clamping strips and the clamping blocks can conveniently clamp the device in the book fire pocket.

Two rubber hand-held pads are symmetrically fixed between two sides of the middle part of the outer wall of the hand-held cylinder and the limiting ring, so that the rubber hand-held cylinder is antiskid and convenient to hold.

The chalk is characterized in that a layer of wavy rubber anti-slip pad is fixedly connected to the top surface of the pressing handle, the wavy rubber anti-slip pad is not easy to slip when being pressed by fingers, and the chalk is convenient to push forwards or move backwards so as to adjust the length of the chalk exposed.

The utility model discloses the beneficial effect who has is: the utility model has the advantages of reasonable design, a centre gripping section of thick bamboo inserts the rear end of fixed chalk, and the spacing flexure strip centre gripping of front end accessible of chalk is fixed, pushes down and presses the handle to make the locking plate withdraw from the restraint groove and remove the locking to can promote the reach of a centre gripping section of thick bamboo antedisplacement regulation chalk, make the chalk can not break when writing, through handheld barrel casing on a centre gripping section of thick bamboo, be convenient for hold, the hand can not the direct contact chalk.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the locking cylinder of the present invention.

Fig. 3 is a schematic sectional structure diagram of the present invention.

Detailed Description

The present invention will be described in detail below with reference to fig. 1 to 3.

As shown in fig. 1-3, the utility model comprises a hand-held cylinder 1, a clamping column 15, a clamping cylinder 16, a limiting elastic sheet 13, a limiting cylinder 12, an end cover 2 and a locking cylinder 23, wherein the upper end of the hand-held cylinder 1 is fixed with the end cover 2 by screwing, the center of the upper inner wall of the end cover 2 is fixedly connected with a guide column 22, the guide column 22 is fixedly sleeved with a buffer spring 21, the lower end of the buffer spring 21 is fixedly connected with a cover sheet 20, after the end cover 2 is screwed to the upper end of the hand-held cylinder 1, the buffer spring 21 can give elastic thrust to the clamping column 15, the lower outer wall of the hand-held cylinder 1 is fixedly connected with a limiting ring 10, the lower end of the hand-held cylinder 1 is provided with 4 outward-supported L-shaped limiting elastic sheets 13 along the edge, the lower outer wall of the hand-held cylinder 1 is movably sleeved with the limiting cylinder 12, the lower end of the limiting cylinder 12 is provided with a chamfer along the inner side, the front end of the chalk extends out of the lower end of the handheld barrel 1, the compression spring 11 can push the limiting ring 10 forward, the limiting ring 10 moves forward, the chamfer angle of the inner wall of the front end of the limiting ring 10 can facilitate the front end of the chalk to be sleeved on the outer wall of the limiting elastic sheet 13, the limiting elastic sheet 13 is extruded, the front end of the chalk can be locked, the chalk cannot shake in the handheld barrel 1, the chalk is not easy to break due to the fact that a gap is reserved between the thin front end of the chalk and the handheld barrel 1, the lower end of the limiting elastic sheet 13 is extruded by the limiting barrel 12 and then inwards forms a circular restraining ring to clamp and fix the front end of the chalk, the chalk is not easy to break, a sliding groove 5 penetrating through the upper end of the chalk is formed in the outer wall of the front side of the handheld barrel 1 on the upper side of the limiting ring 10, a plurality of restraining grooves 6 are symmetrically formed in two sides of the sliding groove 5, a clamping barrel 16 is movably sleeved in the handheld barrel 1, a rubber ring 17 is fixedly connected, the upper end fixedly connected with centre gripping post 15 of a centre gripping section of thick bamboo 16, centre gripping post 15's front side outer wall middle part is equipped with screw hole 14, locking section of thick bamboo 23 passes sliding tray 5 back spiro union and fixes in screw hole 14, locking section of thick bamboo 23 internalization is pegged graft and is had T shape pole 24, the upper end fixedly connected with of T shape pole 24 presses handle 7, fixedly connected with reset spring 25 between the lower extreme of T shape pole 24 and the bobbin base inner wall of locking section of thick bamboo 23, the symmetry is equipped with locking groove 26 on the both sides outer wall of locking section of thick bamboo 23, the both sides outer wall lower extreme of T shape pole 24 is fixed with two locking plate 18 through the symmetry articulated of torsional spring axle 19, locking plate 18 of both sides is original to keep the level and its outside tip is pegged graft. When the chalk is pushed down, the locking pieces 18 on the two sides rotate inwards to be retracted to the two sides of the T-shaped rod 24, so that the locking pieces 18 are separated from the restraining groove 6, the locking is released, and the pressing handle 7 is pressed to push the clamping column 15 forwards, so that the chalk can move forwards and extend out of the handheld barrel 1.

In this embodiment, the outer wall of the right side of the end cover 2 is fixedly connected with an elastic clamping strip 3, and the inner side outer wall of the lower end of the elastic clamping strip 3 is fixedly connected with a triangular clamping block 4. The elastic clamping strips 3 and the clamping blocks 4 can conveniently clamp the device in the book fire pocket.

In this embodiment, two rubber hand-held pads 9 are symmetrically fixed between two sides of the middle of the outer wall of the hand-held cylinder 1 and the limiting ring 10. The rubber hand-held pad 9 can be skidproof and is convenient to hold.

In this embodiment, a layer of corrugated rubber anti-slip pad 8 is fixedly connected to the top surface of the pressing handle 7. The wavy lines are not easy to slip when being pressed by fingers, and are convenient to push forwards or move backwards so as to adjust the chalk exposure length.

When the chalk clamping device is used, the rear end of a chalk is inserted into the clamping cylinder 16, the rubber ring 17 can restrain and fix the chalk to enable the chalk to be firmly fixed, the clamping cylinder 16 is inserted into the handheld cylinder 1, the locking cylinder 23 is pressed downwards and inserted into the sliding groove 5, the locking piece 18 can be clamped in the restraining groove 6 to lock the clamping cylinder 16 after the pressing handle 7 is loosened, the end cover 2 is screwed to the upper end of the handheld cylinder 1, then the pressing handle 7 is pressed to push the clamping column 15 forwards, the front end of the chalk extends out of the front end of the limiting elastic piece 13, the handheld cylinder 1 is held by a hand to carry out handwriting, and when the exposed length of the chalk is insufficient, the pressing handle 7 can be pressed to continue to push forwards to adjust the exposed length of.

Claims

1. The utility model provides a chalk holder of elasticity locking, includes handheld a section of thick bamboo, centre gripping post, a centre gripping section of thick bamboo, spacing flexure strip, a spacing section of thick bamboo, end cover, a locking section of thick bamboo, its characterized in that: an end cover is fixed at the upper end of the handheld cylinder in a screwed connection mode, a guide column is fixedly connected to the center of the inner wall of the upper side of the end cover, a buffer spring is fixedly sleeved on the guide column, a cover plate is fixedly connected to the lower end of the buffer spring, a limiting ring is fixedly connected to the outer wall of the lower side of the handheld cylinder, 4 outwards-supported L-shaped limiting elastic sheets are fixedly arranged at the edge of the lower end of the handheld cylinder, a limiting cylinder is movably sleeved on the outer wall of the lower end of the handheld cylinder, a chamfer is arranged at the inner side of the lower end of the limiting cylinder, a compression spring is fixedly connected between the limiting cylinder and the limiting ring, a sliding groove penetrating through the upper end of the handheld cylinder is formed in the outer wall of the front side of the handheld cylinder at the upper side of the limiting ring, a plurality of restraining grooves are symmetrically formed in two sides of the sliding groove, a clamping cylinder is movably sleeved in the handheld cylinder, a, the upper end fixedly connected with centre gripping post of a centre gripping section of thick bamboo, the front side outer wall middle part of centre gripping post is equipped with the screw hole, a locking section of thick bamboo passes the spiro union behind the sliding tray and fixes in the screw hole, the activity is pegged graft in the locking section of thick bamboo has T shape pole, the upper end fixedly connected with of T shape pole presses the handle, fixedly connected with reset spring between the lower extreme of T shape pole and the bobbin base inner wall of a locking section of thick bamboo, the symmetry is equipped with the locking groove on the both sides outer wall of a locking section of thick bamboo, the both sides outer wall lower extreme of T shape pole is fixed with two locking plates through torsional spring axial symmetry is articulated, the locking plate initial holding level of both.

2. A resiliently lockable chalk holder as defined in claim 1, characterized in that: an elastic clamping strip is fixedly connected to the outer wall of the right side of the end cover, and a triangular clamping block is fixedly connected to the outer wall of the inner side of the lower end of the elastic clamping strip.

3. A resiliently lockable chalk holder as defined in claim 1, characterized in that: two rubber hand-held pads are symmetrically fixed between two sides of the middle part of the outer wall of the hand-held cylinder and the limiting ring.

4. A resiliently lockable chalk holder as defined in claim 1, characterized in that: the top surface of the press handle is fixedly connected with a layer of wavy rubber non-slip mat.