CN204123844U - A kind of novel chalk casing - Google Patents
A kind of novel chalk casing Download PDFInfo
- Publication number
- CN204123844U CN204123844U CN201420495826.5U CN201420495826U CN204123844U CN 204123844 U CN204123844 U CN 204123844U CN 201420495826 U CN201420495826 U CN 201420495826U CN 204123844 U CN204123844 U CN 204123844U
- Authority
- CN
- China
- Prior art keywords
- sleeve
- block
- chalk
- fluting
- bolt
- 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
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Abstract
The utility model provides a kind of novel chalk casing, belongs to teaching aid technical field.It solve the problem that existing chalk sleeve is not suitable for finely tuning and gripping.This novel chalk casing, comprise cylindrical sleeve, annular dead ring and be with externally threaded bolt, sleeve has sleeve lining and sleeve outer wall and is respectively equipped with internal thread and external screw thread, and side is provided with bar shaped fluting, dead ring to be set on sleeve and clamping fluting, bolt coordinates the one end be screwed onto away from fluting on sleeve by external screw thread, what also comprise band internal thread manhole holds block, hold block to be coordinated with the external screw thread of sleeve outer wall by the internal thread of through hole and be screwed on sleeve, and hold block and be provided with the arcwall face of symmetrical two indents of sleeve.Chalk is loaded fluting and with dead ring clamping, bolt is rotated pushing chalk and fine-tuning; Forefinger and middle finger are placed on two arcwall faces, hold block, thumb is placed on bolt, similar extruding syringe, avoids existing chalk sleeve to grip inconvenient problem.
Description
Technical field
The utility model belongs to teaching aid technical field, relates to a kind of novel chalk casing.
Background technology
Chalk is important teaching aid, has very long use history.Along with development and the progress of science and technology, multimedia teaching starts constantly universal coming.But in multimedia teaching with use between chalk writing and there is inconvenience, namely finger can be polluted by chalk powder after writing on the blackboard, re-use keyboard and keyboard and mouse then can be made dirty by mouse, therefore existing a kind of chalk sleeve for being embedded chalk.
Such as, Chinese patent application [application number: 201220733560.4; Publication number 202986465U], disclose a kind of chalk sleeve, comprise sleeve, it is characterized in that, be provided with the cardan shaft for advancing chalk to move up near bottom in described sleeve, described cardan shaft is provided with external screw thread, and described sleeve bottom end inwall is provided with internal thread, and the external screw thread on described cardan shaft matches with the internal thread on described sleeve.
And for example, Chinese patent application [application number: 201220633003.5; Publication number 203032153U], disclose a kind of chalk sleeve, it is characterized in that: described chalk sleeve comprises: cylindrical shell, anti-skid design and locking bayonet socket; Wherein: cylindrical shell is hollow cylinder, lower ending opening, and opening part is provided with locking bayonet socket; The outer wall of cylindrical shell is provided with anti-skid design; Locking bayonet socket adopts rotational lock structure.
But existing chalk sleeve is not suitable for finely tuning chalk, and due to chalk sleeve usually thick than chalk, be therefore inconvenient to grip.
Summary of the invention
The purpose of this utility model is for the above-mentioned problems in the prior art, provides a kind of structure simple, and has fine adjustment function and the convenient a kind of novel chalk casing gripped.
The purpose of this utility model realizes by following technical proposal: a kind of novel chalk casing, it is characterized in that: comprise cylindrical sleeve, annular dead ring and the externally threaded bolt of band, described sleeve has sleeve lining and sleeve outer wall and is respectively equipped with internal thread and external screw thread, and sleeve side is provided with bar shaped fluting, described dead ring to be set on sleeve and clamping fluting, described bolt coordinates the one end be screwed onto away from fluting on sleeve by external screw thread, what also comprise band internal thread manhole holds block, described block of holding to be coordinated with the external screw thread of sleeve outer wall by the internal thread of through hole and is screwed on described sleeve, and described block of holding is provided with the arcwall face of symmetrical two indents of sleeve.
During use, chalk is loaded on fluting, with dead ring clamping fluting, chalk is fixed afterwards, when needs promote chalk or when finely tuning, bolt rotated pushing chalk; Hold block owing to having, therefore forefinger and middle finger are placed on respectively on two arcwall faces, block is held in the centre of the palm, and thumb can be placed on bolt, is similar to the posture of extruding syringe, therefore avoids the problem of the excessive finger grip inconvenience of existing chalk sleeve.
In above-mentioned a kind of novel chalk casing, described block of holding has and vertically with arcwall face respectively holds block end face and hold block bottom surface, and described holding block end face and hold on block bottom surface is respectively equipped with anti-skid rack.
After finishing using, chalk sleeve is placed in lecture, holds block and then contact with lecture, anti-skid rack is set and prevents the relative lecture of chalk sleeve from sliding.
In above-mentioned a kind of novel chalk casing, the overall symmetrical structure of described chalk sleeve, and sleeve is provided with two with the fluting of sleeve lining axisymmetrical.
Arrange symmetrical fluting to be conducive to loading chalk.
In above-mentioned a kind of novel chalk casing, described bolt is provided with cylindrical fixed block away from one end of sleeve, and described fixed block rounded face diameter is identical with sleeve outer wall diameter.
Arrange the convenient thumb of fixed block and fixed block carry out against, when not in use, swivel bolt by fixed block and sleeve against, global shape is extremely coordinated.
In above-mentioned a kind of novel chalk casing, described dead ring is that elastomeric material is made.
Compared with prior art, the utility model tool has the following advantages:
Chalk is loaded on fluting, with dead ring clamping fluting, chalk is fixed afterwards, when needs promote chalk or when finely tuning, bolt rotated pushing chalk; Hold block owing to having, therefore forefinger and middle finger are placed on respectively on two arcwall faces, block is held in the centre of the palm, and thumb can be placed on bolt, is similar to the posture of extruding syringe, therefore avoids the problem of the excessive finger grip inconvenience of existing chalk sleeve.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of this chalk sleeve.
Fig. 2 is this chalk sleeve side-looking structural representation.
In figure,
1, sleeve; 11, slot;
2, dead ring;
3, bolt; 31, fixed block;
4, block is held; 41, arcwall face; 42, block end face is held; 43, block bottom surface is held; 44, anti-skid rack;
5, chalk.
Detailed description of the invention
Be below specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
As shown in Figure 1-2, a kind of novel chalk casing of the utility model, comprise cylindrical sleeve 1, annular dead ring 2 and the externally threaded bolt 3 of band, sleeve 1 has sleeve 1 inwall and sleeve 1 outer wall and is respectively equipped with internal thread and external screw thread, and sleeve 1 side is provided with bar shaped fluting 11, dead ring 2 to be set on sleeve 1 and clamping fluting 11, bolt 3 coordinates the one end be screwed onto away from fluting 11 on sleeve 1 by external screw thread, what also comprise band internal thread manhole holds block 4, hold the internal thread of block 4 by through hole to coordinate with the external screw thread of sleeve 1 outer wall and be screwed on sleeve 1, and hold block 4 and be provided with the arcwall face 41 of symmetrical two indents of sleeve 1.
Further, hold block 4 and have and vertically with arcwall face 41 respectively hold block end face 42 and hold block bottom surface 43, and hold block end face 42 and hold on block bottom surface 43 and be respectively equipped with anti-skid rack 44.The overall symmetrical structure of chalk sleeve, and sleeve 1 is provided with two with the fluting 11 of sleeve 1 inwall axisymmetrical.Bolt 3 is provided with cylindrical fixed block 31 away from one end of sleeve 1, and fixed block 31 rounded face diameter is identical with sleeve 1 outer diameter.Dead ring 2 is made for elastomeric material.
During use, chalk 5 is loaded on fluting 11, clamp fluting 11 pairs of chalks 5 with dead ring 2 afterwards and be fixed, when needs promote chalk 5 or when finely tuning, bolt 3 rotated pushing chalk 5; Hold block 4 owing to having, therefore forefinger and middle finger are placed on respectively on two arcwall faces 41, block 4 is held in the centre of the palm, and thumb can be placed on bolt 3, is similar to the posture of extruding syringe, therefore avoids the problem of the excessive finger grip inconvenience of existing chalk sleeve.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Although more employ sleeve 1, fluting 11, dead ring 2, bolt 3, fixed block 31 herein, hold block 4, arcwall face 41, hold block end face 42, hold block bottom surface 43, the term such as anti-skid rack 44, chalk 5, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present utility model more easily; The restriction that they are construed to any one additional is all contrary with the utility model spirit.
Claims (5)
1. a novel chalk casing, it is characterized in that: comprise cylindrical sleeve (1), annular dead ring (2) and the externally threaded bolt of band (3), described sleeve (1) has sleeve (1) inwall and sleeve (1) outer wall and is respectively equipped with internal thread and external screw thread, and sleeve (1) side is provided with bar shaped fluting (11), described dead ring (2) is set in sleeve (1) and goes up and clamping fluting (11), described bolt (3) coordinates the one end be screwed onto away from fluting (11) on sleeve (1) by external screw thread, what also comprise band internal thread manhole holds block (4), the described internal thread of block (4) by through hole of holding coordinates with the external screw thread of sleeve (1) outer wall and is screwed on described sleeve (1), and described block (4) of holding is provided with the arcwall face (41) of symmetrical two indents of sleeve (1).
2. a kind of novel chalk casing according to claim 1, it is characterized in that: described block (4) of holding has and vertically with arcwall face (41) respectively holds block end face (42) and hold block bottom surface (43), and described holding block end face (42) and hold on block bottom surface (43) is respectively equipped with anti-skid rack (44).
3. a kind of novel chalk casing according to claim 2, is characterized in that: the overall symmetrical structure of described chalk sleeve, and sleeve (1) is provided with two with the fluting (11) of sleeve (1) inwall axisymmetrical.
4. a kind of novel chalk casing according to claim 3, it is characterized in that: described bolt (3) is provided with cylindrical fixed block (31) away from one end of sleeve (1), and described fixed block (31) rounded face diameter is identical with sleeve (1) outer diameter.
5. a kind of novel chalk casing according to claim 4, is characterized in that: described dead ring (2) is made for elastomeric material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420495826.5U CN204123844U (en) | 2014-08-29 | 2014-08-29 | A kind of novel chalk casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420495826.5U CN204123844U (en) | 2014-08-29 | 2014-08-29 | A kind of novel chalk casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204123844U true CN204123844U (en) | 2015-01-28 |
Family
ID=52380230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420495826.5U Expired - Fee Related CN204123844U (en) | 2014-08-29 | 2014-08-29 | A kind of novel chalk casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204123844U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106808842A (en) * | 2015-12-02 | 2017-06-09 | 王昱 | Point protector |
-
2014
- 2014-08-29 CN CN201420495826.5U patent/CN204123844U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106808842A (en) * | 2015-12-02 | 2017-06-09 | 王昱 | Point protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20150829 |
|
| EXPY | Termination of patent right or utility model |