CN207711645U - The embedded chalk of pen tube self-regulated - Google Patents

Abstract

The embedded chalk of pen tube self-regulated of the utility model, it is made of pen tube, core pipe and pen cap, there is the cone mouth of necking down in the front end of pen tube, it is equipped with core pipe in the cooperation of pen tube internal clearance, there is contraction notch in the front end of core pipe, chalk is placed in core pipe by cone mouth, the tail end of chalk has the tail of chalk adjustment spring and core pipe to block up mutually support, tail, which blocks up rear end, core pipe adjustment spring and the stifled mutually support of pen tube tail, it has been set with the adjusting sliding sleeve of core pipe in the cooperation of pen tube external series gap, has had locking key to pass through the sliding slot of pen tube that will adjust sliding sleeve and is connected with core pipe locking.Pen tube, core pipe and adjusting sliding sleeve are fixed together using locking key, when using the utility model, length and the position of the chalk in core pipe can be freely controlled, reduce hand and chalk frequency of exposure, accomplish clean hygiene, also reduce the waste of chalk；Sawed-off teacher can utilize the embedded chalk of pen tube self-regulated to increase the height write, and reduce the number to erase the board, the sucking of indirect less chalk dust, while also the classmate of heel row can be allowed to see blackboard clearly, increase learning efficiency.

Description

The embedded chalk of pen tube self-regulated

Technical field

The utility model is related to a kind of teaching chalk more particularly to a kind of embedded chalks of pen tube self-regulated.

Background technology

Chalk is the important tool in teachers ' teaching activity, for a long time using the hand and clothing that can make teacher dirty, in turn Appearance cannot be arranged；Individual teachers can also have allergic reaction, be not conducive to good health；When chalk writes, it can not be pinched with finger Chalk firmly just needs to abandon, and reduces utilization rate；In addition, when sawed-off teacher writes writing on the blackboard, blackboard is often reached Top writes on word the middle and lower part of blackboard, causes the student of heel row not see blackboard, influences teaching efficiency.

Invention content

The purpose of this utility model is exactly to provide a kind of embedded chalk of pen tube self-regulated to improve original technology.

The embedded chalk of pen tube self-regulated of the utility model, is made of pen tube and core pipe, and there is the cone of necking down in the front end of pen tube Mouthful, it is equipped with core pipe in the cooperation of pen tube internal clearance, there is contraction notch in the front end of core pipe, is placed in chalk in core pipe by cone mouth, powder The tail end of pen has the tail of chalk adjustment spring and core pipe to block up mutually support, and tail, which blocks up rear end, has core pipe adjustment spring to block up phase branch with pen tube tail Support has been set with the adjusting sliding sleeve of core pipe in the cooperation of pen tube external series gap, has the sliding slot that locking key passes through pen tube that will adjust sliding sleeve and core pipe Be connected locking.

The cone mouth phase intussusception of pen cap and pen tube as a further improvement of the utility model,.

The core pipe inner wall is horn mouth as a further improvement of the utility model,.

As a further improvement of the utility model, screw thread is equipped in core pipe lower end inner wall ring week.

The core pipe outer tube wall for shrinking notch both sides as a further improvement of the utility model, is equipped with location hole, clamp spring Both ends be placed in location hole.

The embedded chalk of pen tube self-regulated of the utility model, it is reasonable in design, using locking key by pen tube, core pipe and adjusting Sliding sleeve is fixed together, and when using the utility model, can freely control length and the position of the chalk in core pipe, reduce hand with Chalk frequency of exposure accomplishes that clean hygiene, teacher can arrange appearance, has made clothes dirty without worry, has been conducive to teacher's It is physically and mentally healthy；The waste for also reducing chalk, improves service efficiency；Sawed-off teacher can utilize the embedded powder of pen tube self-regulated Pen increases the height write, and reduces the number to erase the board, reduces the sucking of chalk dust, while it is black also to allow the classmate of heel row to see clearly Plate increases learning efficiency.

Description of the drawings

Fig. 1 is the sectional view of the embedded chalk of utility model pen tube self-regulated；

Fig. 2 is the structural schematic diagram of the core pipe of the embedded chalk of utility model pen tube self-regulated.

Specific implementation mode

Below in conjunction with the accompanying drawings to the embedded chalk of pen tube self-regulated of utility model, it is described further.

As depicted in figs. 1 and 2, the embedded chalk of pen tube self-regulated of the utility model, by 3 structure of pen tube 1, core pipe 2 and pen cap At the front end of pen tube 1 has the cone mouth 4 of necking down, cone mouth 4 that can facilitate insertion chalk；It is equipped with core pipe 2, core in the cooperation of 1 internal clearance of pen tube The front end of pipe 2, which has, shrinks notch 5, and 2 outer tube wall of core pipe for shrinking 5 both sides of notch is equipped with location hole, and the both ends of clamp spring 14 are placed in In location hole, 5 flexible function of notch is shunk, it under external force can free open and contraction；The chalk being placed in by cone mouth 4 6 in core pipe 2, and the tail end of chalk 6 has the tail of chalk adjustment spring 7 and core pipe 2 to block up the support of 8 phases, and tail, which blocks up 8 rear ends, core pipe adjusting Spring 9 blocks up the support of 10 phases with pen tube tail, has been set with the adjusting sliding sleeve 11 of core pipe 2 in the cooperation of 1 external series gap of pen tube, has had locking key 12 to pass through The sliding slot 13 of pen tube 1 will adjust sliding sleeve 11 and be connected with core pipe 2 locking, after connection, make pen tube 1, adjusting sliding sleeve 11 and the company of core pipe 2 It is connected in one, when slidable adjustment 11 can drive internal core pipe 2 to move together, realize the function of automatic adjustment chalk length； The 4 phase intussusception of cone mouth of pen cap 3 and pen tube 1.

2 appearance of core pipe is that the inner wall of straight-tube shape, lower end 2cm or so is that horn mouth, the i.e. wall thickness of 2 lower end of core pipe are small In upper end wall thickness；Or 2 inner diameter of steel flue of core pipe is gradually increased from top to bottom；And it is equipped with screw thread in 2 lower end inner wall ring week of core pipe.

The embedded chalk of pen tube self-regulated of the utility model, specific application method are as follows：

The right hand holds the pen tube of the embedded chalk of pen tube self-regulated, and the pen tube tail that palm outer rim withstands pen tube rear end is stifled, thumb Sliding sleeve will be rationally adjusted with index finger and moves backward 1.5 centimetres or so, then the front end of pen tube is directed to the rear end of chalk, by chalk It is inserted into pen tube and arrives bottom, decontrol adjusting sliding sleeve at this time and can be used；Moved forward if you need to chalk, can first make pen tube front end with it is black 1.5-2.0 centimetres of distance is kept between plate, then will be adjusted sliding sleeve and is slided backward, then decontrols, you can be continuing with.

Claims (5)

1. the embedded chalk of pen tube self-regulated, by pen tube（1）, core pipe（2）It constitutes, it is characterised in that pen tube（1）Front end have necking down Cone mouth（4）, in pen tube（1）Internal clearance cooperation is equipped with core pipe（2）, core pipe（2）Front end have contraction notch（5）, pass through cone mouth （4）The chalk of merging（6）In core pipe（2）In, chalk（6）Tail end have chalk adjustment spring（7）With core pipe（2）Tail block up (8) It mutually supports, tail, which blocks up (8) rear end, core pipe adjustment spring（9）It is stifled with pen tube tail（10）It mutually supports, in pen tube（1）External series gap engagement sleeves Core pipe is filled（2）Adjusting sliding sleeve（11）, there is locking key（12）Across pen tube（1）Sliding slot（13）Sliding sleeve will be adjusted（11）With core pipe （2）Be connected locking.

2. the embedded chalk of pen tube self-regulated as described in claim 1, it is characterised in that pen cap（3）With pen tube（1）Cone mouth（4） Phase intussusception.

3. the embedded chalk of pen tube self-regulated as described in claim 1, it is characterised in that core pipe（2）Lower end inner wall is horn mouth.

4. the embedded chalk of pen tube self-regulated as claimed in claim 3, it is characterised in that core pipe（2）Lower end inner wall ring week is equipped with spiral shell Line.

5. the embedded chalk of pen tube self-regulated as described in claim 1, it is characterised in that shrink notch（5）The core pipe of both sides（2） Outer tube wall is equipped with location hole, clamp spring（14）Both ends be placed in location hole.