CN103303032A

CN103303032A - Chalk sleeve

Info

Publication number: CN103303032A
Application number: CN2013102533311A
Authority: CN
Inventors: 戴建华; 冒莉
Original assignee: Wuxi Institute of Commerce
Current assignee: Wuxi Institute of Commerce
Priority date: 2013-06-25
Filing date: 2013-06-25
Publication date: 2013-09-18

Abstract

The invention discloses a chalk sleeve which comprises a housing, wherein the housing is an accommodation cavity with one opened end; the accommodation cavity is internally provided with a spring connected with the bottom; the other end of the spring is connected with a flat plate; a chalk allows the spring to be in a compression state through the flat plate; a locking device is arranged on a side wall of the accommodation cavity and used for fixing the chalk; and a laser pen and a pointer are arranged outside the accommodation cavity and connected with the housing respectively. The chalk sleeve facilitates teaching aid preparation of a teacher, can make full use of the chalk, and reduces waste.

Description

A kind of chalk sleeve

Technical field

The present invention relates to a kind of chalk sleeve.

Background technology

Teachers ' teaching be unable to do without chalk, and chalk dust is a very big injury to teacher, and breathing chalk dust for a long time can be influential to respiratory tract, and simultaneously pushing time contact chalk dust can make hand dry and cracked.Occurred various chalk sleeves in the prior art, be used for preventing that the pushing time from contacting with chalk, simultaneously, the part that chalk exposes is very short, and not only frangibility not also can take full advantage of the chalk head, thereby reduce waste,

In addition, teacher is when teaching, need make indication to corresponding position on the blackboard, lower position on blackboard, teacher's custom is made indication with teacher's pointer, higher position on blackboard, common teacher's pointer is difficult to make indication, so just need indicate with laser pen, therefore, teacher before class needs special standby chalk sleeve, teacher's pointer, laser pen also needs that textbook, other facilities of teaching such as computer have increased some unnecessary work, in use also may be because will look for corresponding teaching aid, waste the time, interrupted thinking, brought very big trouble simultaneously.

Summary of the invention

Technical problem to be solved by this invention is: at shortcoming and defect of the prior art, the invention provides a kind of chalk sleeve, at chalk sleeve teacher's pointer and laser pen are set simultaneously, solved teacher's problem of the standby multiple teaching aid of need before class, saved the time.

The present invention adopts following technical scheme for solving the problems of the technologies described above:

A kind of chalk sleeve comprises housing, and described housing is the container cavity of an end opening; The spring that is connected with the bottom is set in the described container cavity, and the spring other end is connected with dull and stereotyped, and chalk makes spring be in compressive state by flat board, and described container cavity sidewall arranges locking device, is used for fixedly chalk; Described container cavity outside arranges laser pen, teacher's pointer respectively, and described laser pen, teacher's pointer are connected with described housing respectively.

Also comprise the teacher's pointer fixture that is arranged on the housing, teacher's pointer is arranged on the teacher's pointer fixture.

Described locking device is clamping device or spiral knob; Described locking device setting and container cavity opening part.

Described teacher's pointer fixture is hinge or screw.

Described teacher's pointer is collapsible teacher's pointer or telescopic teacher's pointer.

Compared with prior art, the present invention has following beneficial effect:

(1) integrated laser pen and teacher's pointer on the chalk sleeve, avoid staff directly to contact with chalk, chalk dust can directly not sticked on the staff, have common and two kinds of functions of electronic teacher pointer, avoid the long-time and blackboard close contact of teacher, made things convenient for teacher to prepare teaching aid.

(2) locking device is selected clamping device or spiral knob, and is arranged at the container cavity opening part, makes chalk still can use very in short-term, and not only frangibility not also can take full advantage of the chalk head, thereby reduce waste.

Description of drawings

Fig. 1 is structured flowchart of the present invention.

Wherein, being labeled as among the figure: 1-chalk; The 2-locking device; The 3-housing; The 4-flat board; The 5-spring; 6-button cell box; The 7-teacher's pointer; The 8-laser pen; The 9-laser head; 10-teacher's pointer fixture.

The specific embodiment

Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated:

A kind of chalk sleeve comprises housing 3, and described housing 3 is the container cavity of an end opening; The spring 5 that is connected with the bottom is set in the described container cavity, and spring 5 other ends are connected with dull and stereotyped 4, and chalk 1 makes spring 5 be in compressive state by dull and stereotyped 4, and described container cavity sidewall arranges locking device 2, is used for fixedly chalk 1; Described container cavity outside arranges laser pen 8, teacher's pointer 7 respectively, and described laser pen 8, teacher's pointer 7 are connected with described housing 3 respectively.

Also comprise the teacher's pointer fixture 10 that is arranged on the housing 3, teacher's pointer 7 is arranged on the teacher's pointer fixture 10.

Described locking device 2 is clamping device or spiral knob; Described locking device 2 arranges and the container cavity opening part.

Described teacher's pointer fixture 10 is hinge or screw.

Its concrete structure as shown in Figure 1, a kind of chalk sleeve comprises housing 3, described housing 3 comprises two container cavities, and two container cavities bottom is fixedly connected, and the opening direction of two container cavities is opposite; The spring 5 of fixedlying connected with the bottom wherein is set in first container cavity, and spring 5 other ends are connected with dull and stereotyped 4, and chalk 1 makes spring 5 be in compressive state by dull and stereotyped 4, and the described first container cavity sidewall arranges locking device 2, is used for fixedly chalk 1; The described second container cavity inner bottom part arranges button cell box 6, and described button cell box 6 tops arrange laser pen 8, and the laser head 9 of described laser pen 8 is arranged at the opening part of second container cavity; The collapsible teacher's pointer of the second container cavity arranged outside, described teacher's pointer fixture 10 are arranged at the second container cavity lateral wall opening part, and collapsible teacher's pointer is arranged on the teacher's pointer fixture.

Present embodiment is analyzed the using method of this device as teacher's pointer fixture 10 as locking device 2, with hinge with spiral knob;

Described spring 5 does not take place under the elastically-deformable state, dull and stereotyped 4 are positioned at spiral button place, the spiral button of outwarding winding, chalk is pushed container cavity, by dull and stereotyped 4 compression springs 5, after chalk 1 was pushed into container cavity, the part that is exposed was advisable with the length that the teacher is accustomed to using, and screwed spiral button this moment, spiral button is pressed on the sidewall of container cavity chalk 1, the part that the discovery chalk exposes in the use is too short, and the spiral button of can outwarding winding on the other hand makes chalk 1 release container cavity by the elastic force of spring 5, in order to prevent that chalk 1 from being ejected, another hand is lived chalk 1, releases suitable length, screws spiral button.

Described two container cavities can be used as integral type and connect, and share a bottom, perhaps between two container cavities a plate washer are set, and spring 5 is fixed on the baffle plate.

It is parallel with housing 3 that described teacher's pointer 7 can be arranged at the outside of described housing 3.

Claims

1. a chalk sleeve comprises housing, it is characterized in that: described housing is the container cavity of an end opening; The spring that is connected with the bottom is set in the described container cavity, and the spring other end is connected with dull and stereotyped, and chalk makes spring be in compressive state by flat board, and described container cavity sidewall arranges locking device, is used for fixedly chalk; Described container cavity outside arranges laser pen, teacher's pointer respectively, and described laser pen, teacher's pointer are connected with described housing respectively.

2. chalk sleeve according to claim 1, it is characterized in that: also comprise the teacher's pointer fixture that is arranged on the housing, teacher's pointer is arranged on the teacher's pointer fixture.

3. chalk sleeve according to claim 1, it is characterized in that: described locking device is clamping device or spiral knob; Described locking device setting and container cavity opening part.

4. chalk sleeve according to claim 2, it is characterized in that: described teacher's pointer fixture is hinge or screw.

5. chalk sleeve according to claim 1 and 2, it is characterized in that: described teacher's pointer is collapsible teacher's pointer or telescopic teacher's pointer.