CN201849098U - Chalk dust preventing device - Google Patents
Chalk dust preventing device Download PDFInfo
- Publication number
- CN201849098U CN201849098U CN2010205835457U CN201020583545U CN201849098U CN 201849098 U CN201849098 U CN 201849098U CN 2010205835457 U CN2010205835457 U CN 2010205835457U CN 201020583545 U CN201020583545 U CN 201020583545U CN 201849098 U CN201849098 U CN 201849098U
- Authority
- CN
- China
- Prior art keywords
- chalk
- movable part
- base
- utility
- model
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
Abstract
The utility model provides a chalk dust preventing device, comprising a movable part, a housing and a base. The movable part is provided with a cavity, a piece of chalk is placed in the cavity of the movable part, and the extending end at the bottom of the movable part is provided with external threads. The base is provided with a salient part, and internal threads corresponding to the external threads are arranged in the salient part. The extending end of the movable part is installed in the salient part of the base through threaded connection, and the housing is sleeved outside the movable part. In the utility model, the chalk dust preventing device is designed so that a user can use the chalk without directly contacting with the chalk. In addition, a regulating mechanism is arranged in a dust preventing structure, and the chalk can automatically stretch out and draw back, therefore, a piece of short chalk also can be used, and the waste of chalk is greatly reduced.
Description
Technical field
The utility model relates to the stationery field, is specifically related to the anti-apparatus for ash of a kind of chalk.
Background technology
In teacher's teaching, word often need write with chalk, chalk in use is easy to generate chip, therefore, and user's the clothes of can making dirty, the long-term use, also can user's respiratory system be caused damage easy sphagitis, the diseases such as bronchitis of getting of user, and chalk promptly can not reuse and usually cause many unnecessary wastes with after short.
The utility model content
At above problem, the utility model is by the anti-apparatus for ash of a kind of chalk of design, the user need not directly to contact with chalk to use chalk, for reaching this purpose, the utility model provides a kind of chalk to prevent apparatus for ash, comprise movable part, shell and base, described movable part has cavity, be placed with chalk in the movable part cavity, on the external part of movable part bottom external screw thread is arranged, described base has protuberance, has in the protuberance and the corresponding internal thread of external screw thread, described movable part external part is installed in by being threaded in the protuberance of base, and described shell is enclosed within outside the movable part.
As further improvement of the utility model, be provided with internal thread in the described shell, described movable part is outside equipped with and the corresponding external screw thread of internal thread, for the ease of moving respective threads can be set in the enclosure, carries out transmission with convenient by screw thread.
The utility model makes that the user need not directly to contact with chalk to use chalk, and is provided with governor motion in the anti-gray structure that can stretch voluntarily, the brachycephaly chalk also can use, and has significantly reduced the waste to chalk by the anti-apparatus for ash of a kind of chalk of design.
Description of drawings
Shown in Figure 1 is structural representation of the present utility model;
Member among the figure is:
1, chalk; 2, movable part; 3, shell; 4, base;
The specific embodiment
Below in conjunction with drawings and Examples utility model is described in detail:
The utility model is by the anti-apparatus for ash of a kind of chalk of design, and the user need not directly to contact with chalk to use chalk.
The utility model provides a kind of chalk as shown in Figure 1 anti-apparatus for ash, comprise movable part 2, shell 3 and base 4, described movable part 2 has cavity, be placed with chalk 1 in movable part 2 cavitys, on the movable part 2 bottom external parts external screw thread is arranged, described base 4 has protuberance, have in the protuberance and the corresponding internal thread of external screw thread, described movable part 2 external parts are installed in the protuberance of base 4 by being threaded, described shell 3 is enclosed within outside the movable part 2, is provided with internal thread in the described shell 3, and described movable part 2 is outside equipped with and the corresponding external screw thread of internal thread, can in shell 3, respective threads be set for the ease of moving, carry out transmission by screw thread with convenient.
The utility model makes that the user need not directly to contact with chalk to use chalk, and is provided with governor motion in the anti-gray structure that can stretch voluntarily, the brachycephaly chalk also can use, and has significantly reduced the waste to chalk by the anti-apparatus for ash of a kind of chalk of design.
The above; it only is preferred embodiment of the present utility model; be not to be the restriction of the utility model being made any other form, and, still belong to the utility model scope required for protection according to any modification or equivalent variations that technical spirit of the present utility model is done.
Claims (2)
1. a chalk is prevented apparatus for ash, comprise movable part (2), shell (3) and base (4), it is characterized in that: described movable part (2) has cavity, be placed with chalk (1) in movable part (2) cavity, on the external part of movable part (2) bottom external screw thread is arranged, described base (4) has protuberance, have in the protuberance and the corresponding internal thread of external screw thread, described movable part (2) external part is installed in by being threaded in the protuberance of base (4), and described shell (3) is enclosed within outside the movable part (2).
2. a kind of chalk according to claim 1 is prevented apparatus for ash, it is characterized in that: described shell is provided with internal thread in (3), and described movable part (2) is outside equipped with and the corresponding external screw thread of internal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205835457U CN201849098U (en) | 2010-10-29 | 2010-10-29 | Chalk dust preventing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205835457U CN201849098U (en) | 2010-10-29 | 2010-10-29 | Chalk dust preventing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201849098U true CN201849098U (en) | 2011-06-01 |
Family
ID=44091509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205835457U Expired - Fee Related CN201849098U (en) | 2010-10-29 | 2010-10-29 | Chalk dust preventing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201849098U (en) |
-
2010
- 2010-10-29 CN CN2010205835457U patent/CN201849098U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204129603U (en) | A kind of computer cabinet with electromagnetic power-supply self-locking device | |
| CN201849098U (en) | Chalk dust preventing device | |
| CN102452250A (en) | Dust-proof device for chalk | |
| CN202634926U (en) | U disk preventing U disk cap from loss | |
| CN203465682U (en) | Novel mouse with adjustable height | |
| CN202051192U (en) | Writing table | |
| CN205255828U (en) | Ball -point pen | |
| CN204256673U (en) | There is the computer keyboard with cover of function of containing articles | |
| CN204229311U (en) | A kind of school computing machine | |
| CN203708497U (en) | Timing network card | |
| CN202742886U (en) | Multifunctional pen | |
| CN202498932U (en) | Pen container | |
| CN202434200U (en) | USB (Universal Serial Bus) flash disk with reminding function in case of forgetting | |
| CN202404539U (en) | Mouse capable of conveniently containing connecting wire | |
| CN203150782U (en) | Concentrator | |
| CN202870728U (en) | Mouse with voice and image input function | |
| CN202749871U (en) | Power supply for safe keyboard | |
| CN205608665U (en) | Smart mouse based on DSP image location and voice recognition | |
| CN204945961U (en) | A kind of novel hand-held computer mouse point device | |
| CN203659612U (en) | Current transformer for monitoring energy consumption | |
| CN203910050U (en) | Training device for college English listening | |
| CN204005464U (en) | A kind of multi-function desk lamp | |
| CN201556176U (en) | Practical casing for wireless mouse | |
| CN202949634U (en) | Protective sleeve for battery used in printed board | |
| CN203278927U (en) | Plug for mobile phone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20111029 |