CN204432073U

CN204432073U - A kind of chalk holder

Info

Publication number: CN204432073U
Application number: CN201520027582.2U
Authority: CN
Inventors: 王钦儒
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-01-15
Filing date: 2015-01-15
Publication date: 2015-07-01
Anticipated expiration: 2025-01-15

Abstract

The utility model belongs to realia technical field, particularly relates to a kind of chalk holder, comprises the shaft of a writing brush, and described shaft of a writing brush internal cavity is slidably fitted with the pen cap, and the shaft of a writing brush is connected with the cap for brush and nib, and nib is outer is provided with cap of starting writing; Be provided with Compress Spring between pen cap top and the upper cap for brush, pen cap top is run through and is provided with backstay; Shaft of a writing brush bottom is provided with position-limiting tube, and position-limiting tube is rotatablely equipped with position limited gear, and position limited gear runs through the tube wall of position-limiting tube, and position limited gear is uniformly distributed along position-limiting tube circumference; The outer slip cap of position-limiting tube is equipped with adjustable pipe, and adjustable pipe lower inner wall is provided with the tooth bar coordinated with the gear teeth of position limited gear, and adjustable pipe top and the shaft of a writing brush offset, and is provided with Compress Spring between adjustable pipe bottom and nib; Shaft of a writing brush outer wall is provided with sweat absorbing cotton.The utility model regulates very simple, avoids chalk dust to adhere on hand, effectively avoids chalk to fracture, and can utilize the chalk end that length is very little, health easy to use, effectively improves chalk utilization rate.

Description

A kind of chalk holder

Technical field

The utility model belongs to realia technical field, particularly relates to a kind of chalk holder.

Background technology

Chalk is the apparatus widely used in daily teaching, is for general on blackboard and writes.The composition mainly calcium sulfate of chalk, be not easy to be decomposed, particle is larger than dust.At present, teacher is directly hold with a hand chalk to write when using chalk, and chalk dust can stick to your hands, and Long-Time Service can cause certain injury to hand skin, simultaneously because the toughness of chalk own is poor, long chalk is easy to cause in writing process fracture, and not only brings very big inconvenience to writing, and, when only remaining very little one section of chalk, cannot grip, can not use, cause a large amount of wastes of chalk.

Utility model content

Technical problem to be solved in the utility model is: the deficiency existed for prior art, provides a kind of chalk holder, avoid chalk dust to adhere on hand, chalk is effectively avoided to fracture, and the chalk end that length is very little can be utilized, health easy to use, effectively improve chalk utilization rate.

For solving the problems of the technologies described above, the technical solution of the utility model is:

A kind of chalk holder, comprise the shaft of a writing brush, the cavity for placing chalk is provided with in the described shaft of a writing brush, the pen cap for entangling chalk is slidably fitted with in described cavity, the top closure of the described pen cap, the top of the described shaft of a writing brush is connected with the cap for brush, and the bottom of the described shaft of a writing brush is connected with nib, is provided with cap of starting writing outside described nib;

Compress Spring is provided with between described pen cap top and the upper cap for brush, the closed top end of the described pen cap is provided with through hole, run through in described through hole and be provided with backstay, the bottom of described backstay is provided with the limiting section being positioned at the described pen cap, and the diameter of described limiting section is greater than the diameter of described through hole;

Described shaft of a writing brush bottom is provided with position-limiting tube, described position-limiting tube is rotatablely equipped with the position limited gear of more than three, and described position limited gear runs through the tube wall of described position-limiting tube, and described position limited gear is uniformly distributed along described position-limiting tube circumference;

The outer slip cap of described position-limiting tube is equipped with adjustable pipe, described adjustable pipe lower inner wall is provided with the tooth bar coordinated with the gear teeth of described position limited gear, described adjustable pipe top and the described shaft of a writing brush offset, be provided with Compress Spring between described adjustable pipe bottom and described nib, the two ends of described Compress Spring offset with adjustable pipe and nib respectively;

The position described shaft of a writing brush outer wall being convenient to hand gripping is provided with sweat absorbing cotton.

Improve as one, described adjustable pipe top is provided with wedge shape projection, and described shaft of a writing brush bottom is provided with the wedge-shaped indentation matched with described wedge shape projection.

As improving further, described adjustable pipe outer surface is provided with anti-slip veins.

Improve as one, described position-limiting tube is threaded with the described shaft of a writing brush and nib respectively.

Owing to have employed technique scheme, the beneficial effects of the utility model are:

Owing to being slidably fitted with the pen cap for entangling chalk in shaft of a writing brush cavity, shaft of a writing brush bottom is provided with position-limiting tube, position-limiting tube is provided with position limited gear, the outer slip cap of position-limiting tube is equipped with adjustable pipe, adjustable pipe is provided with tooth bar and matches with the gear teeth of position limited gear, the bare terminal end of chalk is put into the pen cap, the other end and the position limited gear of chalk offset, the gear teeth meshing of adjustable pipe upper rack and position limited gear, make position limited gear prop up chalk chalk is fixed, when needs regulate chalk position, mobile adjustable pipe is held to nib, the tooth bar of adjustable pipe and position limited gear are separated, under the effect of pen cap top Compress Spring, chalk moves to nib end, when chalk stretches out written appropriate length, unclamp adjustable pipe, under the elastic force effect of the Compress Spring of squeeze adjustments pipe, adjustable pipe resets, the tooth bar of adjustable pipe blocks position limited gear, position limited gear is no longer rotated, thus chalk is fixed, chalk is kept to stretch out the appropriate length of nib, regulate very simple, chalk dust is avoided to adhere on hand, chalk is effectively avoided to fracture, and the chalk end that length is very little can be utilized, health easy to use, effective raising chalk utilization rate.

Nib is outer is provided with cap of starting writing, and being overlapped by the pen cap, effectively avoiding chalk to stretch out pen head part and fractureing, keeping health simultaneously, be easy to carry when not using.

Pen cap top is provided with through hole, run through in through hole and backstay is installed, backstay is positioned at the Compress Spring on pen cap top, positioning action is played to Compress Spring, the bottom of backstay is provided with the limiting section being positioned at the pen cap, and the diameter of limiting section is greater than the diameter of through hole, when chalk remain very fraction can not continue use time, residue chalk end can be released the pen cap by pressing backstay easily, is convenient to change chalk.

Position-limiting tube is rotatablely equipped with the position limited gear of more than three, position limited gear is uniformly distributed along position-limiting tube circumference, can effectively be clamped by chalk, and chalk is moved steadily.

Position shaft of a writing brush outer wall being convenient to hand gripping is provided with sweat absorbing cotton, can absorb hand and perspire, and is convenient to grip the shaft of a writing brush.

Adjustable pipe top and the shaft of a writing brush bottom position that offsets is respectively equipped with the wedge-shaped indentation that is mutually slidably matched and wedge shape is protruding, and adjustable pipe outer surface is provided with anti-slip veins, rotates adjustable pipe and just can realize moving axially adjustable pipe, simple to operate laborsaving.

Position-limiting tube is threaded with the shaft of a writing brush and nib respectively, and structure is simple, easy to connect effective.

Accompanying drawing explanation

Fig. 1 is the structural representation of the present embodiment;

Fig. 2 is the internal structure schematic diagram of the present embodiment;

Fig. 3 is the structural representation of position limited gear in the present embodiment;

Wherein: the 1-shaft of a writing brush, 2-chalk, the 3-pen cap, the upper cap for brush of 4-, 5-nib, the cap for brush under 6-, 7-Compress Spring, 8-backstay, 81-limiting section, 9-position-limiting tube, 91-position limited gear, 10-adjustable pipe, 101-tooth bar, 102-wedge shape is protruding, 103-anti-slip veins, 11-sweat absorbing cotton.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.

As shown in Figure 1, Figure 2 with Fig. 3 jointly shown in, a kind of chalk holder, comprises the shaft of a writing brush 1, the cavity for placing chalk 2 is provided with in the shaft of a writing brush 1, be slidably fitted with the pen cap 3 for entangling chalk 2 in cavity, the top closure of the pen cap 3, the top of the shaft of a writing brush 1 is connected with the cap for brush 4, particularly, the upper cap for brush 4 can removably connect with the shaft of a writing brush 1, and the bottom of the shaft of a writing brush 1 is connected with nib 5, is provided with cap 6 of starting writing outside nib 5, particularly, the lower cap for brush 6 can be fastened on written 5 outer walls;

Be provided with Compress Spring 7 between the pen cap 3 top and the upper cap for brush 4, the closed top end of the pen cap 3 is provided with through hole, runs through and be provided with backstay 8 in through hole, and the bottom of backstay 8 is provided with the limiting section 81 being positioned at the pen cap 3, and the diameter of limiting section 81 is greater than the diameter of through hole;

The shaft of a writing brush 1 bottom is provided with position-limiting tube 9, and position-limiting tube 9 is rotatablely equipped with the position limited gear 91 of more than three, position limited gear 91 runs through the tube wall of position-limiting tube 9, and the gear teeth and the chalk 2 of position limited gear 91 offset, and position limited gear 91 is uniformly distributed along position-limiting tube 9 circumference;

The outer slip cap of position-limiting tube 9 is equipped with adjustable pipe 10, adjustable pipe 10 lower inner wall is provided with the tooth bar 101 coordinated with the gear teeth of position limited gear 91, adjustable pipe 10 top and the shaft of a writing brush 1 offset, be provided with a Compress Spring 7 between adjustable pipe 10 bottom and nib 5, the two ends of this Compress Spring 7 offset with adjustable pipe 10 and nib 5 respectively;

The position shaft of a writing brush 1 outer wall being convenient to hand gripping is provided with sweat absorbing cotton 11.

In the present embodiment, adjustable pipe 10 top is provided with wedge shape projection 102, and the shaft of a writing brush 1 bottom is provided with the wedge-shaped indentation matched with wedge shape projection 102, and adjustable pipe 10 outer surface is provided with anti-slip veins 103.

In the present embodiment, position-limiting tube 9 is threaded with the shaft of a writing brush 1 and nib 5 respectively.

The chalk holder that the utility model provides, chalk 2 one end is placed in the pen cap 3, the other end and the position limited gear 91 of chalk 2 offset, when needs regulate chalk 2 position, adjustable pipe 10 is moved to written 5 ends, the tooth bar 101 of adjustable pipe 10 is separated with position limited gear 91, under the effect of the pen cap 3 top Compress Spring 7, chalk 2 moves to written 5 ends, when chalk 2 stretches out written 5 appropriate length, unclamp adjustable pipe 10, under the elastic force effect of the Compress Spring 7 of squeeze adjustments pipe 10, adjustable pipe 10 resets, the tooth bar 101 of adjustable pipe 10 blocks position limited gear 91, position limited gear 91 is no longer rotated, thus chalk 2 is fixed, chalk 2 is kept to stretch out the appropriate length of nib 5, regulate very simple, chalk dust is avoided to adhere on hand, chalk 2 is effectively avoided to fracture, and the chalk end that length is very little can be utilized, health easy to use, effective raising chalk 2 utilization rate.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.

Claims

1. a chalk holder, it is characterized in that, comprise the shaft of a writing brush, the cavity for placing chalk is provided with in the described shaft of a writing brush, be slidably fitted with the pen cap for entangling chalk in described cavity, the top closure of the described pen cap, the top of the described shaft of a writing brush is connected with the cap for brush, the bottom of the described shaft of a writing brush is connected with nib, is provided with cap of starting writing outside described nib;

2. chalk holder according to claim 1, is characterized in that, described adjustable pipe top is provided with wedge shape projection, and described shaft of a writing brush bottom is provided with the wedge-shaped indentation matched with described wedge shape projection.

3. chalk holder according to claim 2, is characterized in that, described adjustable pipe outer surface is provided with anti-slip veins.

4. the chalk holder according to claim 1 or 2 or 3, it is characterized in that, described position-limiting tube is threaded with the described shaft of a writing brush and nib respectively.