CN202702964U - Short pencil lengthening sleeve - Google Patents
Short pencil lengthening sleeve Download PDFInfo
- Publication number
- CN202702964U CN202702964U CN 201220269698 CN201220269698U CN202702964U CN 202702964 U CN202702964 U CN 202702964U CN 201220269698 CN201220269698 CN 201220269698 CN 201220269698 U CN201220269698 U CN 201220269698U CN 202702964 U CN202702964 U CN 202702964U
- Authority
- CN
- China
- Prior art keywords
- outer tube
- chuck
- pencil
- outer bushing
- elastic claw
- 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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- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Abstract
The utility model discloses a short pencil lengthening sleeve, which comprises a hollow outer bushing, wherein a chuck for clamping a pencil is slidably assembled in an inner hole in the lower end of the outer bushing through an anti-rotation structure; the lower end of the chuck is provided with more than two elastic claws which extend out of an orifice in the lower end of the outer bushing along the extension direction of the outer bushing; the outer surface of each elastic claw is respectively provided with an inclined plane which is correspondingly matched with the orifice in the lower end of the outer bushing to synchronously shrink each elastic claw towards the center; the upper end of the outer bushing is provided with a turning cap; the turning cap is in axial stop limiting fit with the outer bushing; and a connecting rod which is coaxially inserted into the inner hole of the outer bushing is fixedly arranged on the turning cap and is in threaded connection with a threaded hole, which is correspondingly formed in the chuck, through external thread. The short pencil lengthening sleeve has the advantages of simple structure, stable connection and convenience in use; and the defect of high probability of instable fixation of a short pencil in use of the conventional lengthening sleeve is solved.
Description
Technical field
The utility model relates to a kind of complementary apparatus of short pencil easy to use, says accurately the lengthening cover that relates to a kind of short pencil.
Background technology
Existing Wood pencil in use can progressively shorten, and will be dropped because being difficult to grip when its length when pencil only remains one or two cun, causes waste.The lengthening cover that can be used in conjunction with short pencil has appearred in the market, but main resilient sleeve and the anchor ear of adopting of this lengthening cover cooperates clamping short pencil bar, it cover in use easily occurs lengthening and is combined untight defective with pencil, lengthen during use between cover and the pencil be connected comparatively slack and undisciplined, cause this lengthening cover to hold a pen in use very uncomfortable, and in use easily occur lengthening the phenomenon that cover comes off, use very inconvenient.
The utility model content
The purpose of this utility model is: provide a kind of short pencil that can fixedly secure short pencil to lengthen cover.
The technical solution of the utility model is: a kind of short pencil lengthens cover, the outer tube that comprises hollow, be useful on the chuck that clamps pencil by only revolving the structure slidable fit in the lower end endoporus of outer tube, the lower end of chuck is provided with the elastic claw that stretches out aperture, outer tube lower end more than two along the outer tube bearing of trend, the outer surface of each elastic claw is respectively equipped with and aperture, overcoat lower end corresponding matching, so that the inclined-plane that each elastic claw shrinks to the center synchronously, upper end at overcoat is provided with turncap, turncap and spacing cooperation of the axial block of outer tube, be fixed with the connecting rod that is inserted in one heart in the outer tube endoporus at turncap, connecting rod is threaded by the corresponding screwed hole of offering in external screw thread and the chuck.
Inner surface at described elastic claw also is provided with the anti-slop serrations that cooperates for the pencil shaft outer surface.
The described structure of only revolving is made of the keyway that only revolves key and be opened on the described inner sleeve outer peripheral face along outer tube bearing of trend correspondence that is convexly set on the inner tubal wall of outer tube bottom.
Short pencil of the present utility model lengthens cover and utilizes the connecting rod that arranges on the turncap to be threaded with chuck, when turncap rotates, because the axial limiting block cooperates between turncap and the outer tube, thereby the connecting rod that is connected on the turncap is threaded connection, and to drive chuck up along outer tube, thereby so that cooperating with aperture, outer tube lower end to shrink to the center synchronously by the inclined-plane that arranges on its outer surface, the elastic claw that the chuck lower end sets firmly clamps the short pencil bar, make and form firm being connected between short pencil bar and the outer tube, it is simple in structure, easy to use, solve existing lengthening cover and the fixing unstable defective of short pencil easily occurred in use.
Description of drawings
Fig. 1 is the structural representation that the utility model short pencil lengthens the concrete embodiment of cover;
Fig. 2 is the A-A profile among Fig. 1;
Fig. 3 is the structural representation of chuck among Fig. 1.
The specific embodiment
The implementation of short pencil lengthening cover of the present utility model is Fig. 1 for example, Fig. 2, shown in Figure 3, this lengthens cover mainly by outer tube 1, chuck 2 and turncap 6 form, wherein, outer tube 1 has and connects on it, the central bore of lower two ends end face, chuck 2 only revolves slidable fit in the endoporus of the bottom of outer tube 1, be installed with more than two around even circumferential at the bearing of trend of the lower end edge outer tube 1 of chuck 2 and distribute and stretch out the elastic claw 3 in aperture, outer tube 1 lower end, be equipped with the inclined-plane that cooperates with aperture, outer tube 1 lower end on the outer surface of each elastic claw 3, each elastic claw 3 shrank to the center by its inclined-plane and cooperating synchronously of aperture, outer tube 1 lower end, realized the clamping to short pencil.Turncap 6 and outer tube 1 concentric setting, simultaneously, the axial limiting block cooperates between the upper end of this turncap 6 and outer tube 1, that the lower end is provided with the connecting rod 7 that stretches into along the center line of outer tube 1 in outer tube 1 endoporus at turncap 6, the lower, outer perimeter face that stretches into outer tube 1 at this connecting rod 7 is provided with external screw thread, offer the screwed hole 20 of perforation in the center of chuck 2 correspondence, connecting rod 7 is threaded with screwed hole 20 in the chuck 2 by its external screw thread.In the present embodiment, also be respectively equipped with the anti-slop serrations 31 that cooperates for the penholder of short pencil at each elastic claw 3 inner surface; Only screwing between chuck 2 and the outer tube 1 close mainly by be convexly set on outer tube 1 inwall only revolve key 5 and the corresponding keyway of vertically offering 4 of chuck 2 outer peripheral faces forms, only revolve key 5 and be provided with altogether three, respectively only revolve key 5 and distribute and be wholely set with the tube wall of outer tube 1 around even circumferential; The lower surface of turncap 6 offers blind hole, the upper end correspondence of outer tube 1 is provided with the inserting paragraph of inserting in this blind hole, form the annular table terrace between the outer wall of this inserting paragraph and outer tube 1, the lower surface of turncap 6 cooperates to block is spacing with the ring-shaped step over glaze on outer tube 1 top.
During use, the penholder end of short pencil 8 is inserted between the elastic claw 3 of chuck 2 lower ends, rotation turncap 6, turncap 6 drives connecting rod and screws in the chuck 2, because axial between turncap 6 and the outer tube 1 block is spacing cooperates, thus connecting rod 7 in rotation process, drive chuck 2 along outer tube 1 inwall be convexly equipped with only to revolve key 5 up, when chuck 2 is up, the inclined-plane of each elastic claw 3 by its outer surface cooperates with aperture, outer tube 1 lower end synchronously to the center contraction, clamping short pencil 8.
Claims (3)
1. a short pencil lengthens cover, it is characterized in that, the outer tube that comprises hollow, be useful on the chuck that clamps pencil by only revolving the structure slidable fit in the lower end endoporus of outer tube, the lower end of chuck is provided with the elastic claw that stretches out aperture, outer tube lower end more than two along the outer tube bearing of trend, the outer surface of each elastic claw is respectively equipped with and aperture, overcoat lower end corresponding matching, so that the inclined-plane that each elastic claw shrinks to the center synchronously, upper end at overcoat is provided with turncap, turncap and spacing cooperation of the axial block of outer tube, be fixed with the connecting rod that is inserted in one heart in the outer tube endoporus at turncap, connecting rod is threaded by the corresponding screwed hole of offering in external screw thread and the chuck.
2. short pencil according to claim 1 lengthens cover, it is characterized in that, also is provided with the anti-slop serrations that cooperates for the pencil shaft outer surface at the inner surface of described elastic claw.
3. short pencil according to claim 1 lengthens cover, it is characterized in that, the described structure of only revolving is made of the keyway that only revolves key and be opened on the described inner sleeve outer peripheral face along outer tube bearing of trend correspondence that is convexly set on the inner tubal wall of outer tube bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220269698 CN202702964U (en) | 2012-06-08 | 2012-06-08 | Short pencil lengthening sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220269698 CN202702964U (en) | 2012-06-08 | 2012-06-08 | Short pencil lengthening sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202702964U true CN202702964U (en) | 2013-01-30 |
Family
ID=47583298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220269698 Expired - Fee Related CN202702964U (en) | 2012-06-08 | 2012-06-08 | Short pencil lengthening sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202702964U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103660708A (en) * | 2014-01-06 | 2014-03-26 | 但姝 | Pencil lengthening sleeve |
| CN107379823A (en) * | 2017-08-04 | 2017-11-24 | 合肥名华教育科技有限公司 | A kind of sleeve joint device of the pencil based on education |
| CN107856446A (en) * | 2017-11-16 | 2018-03-30 | 周默 | A kind of modified form compasses |
| CN107901676A (en) * | 2017-11-16 | 2018-04-13 | 周默 | A kind of multifunctional compass |
| CN107933158A (en) * | 2017-11-16 | 2018-04-20 | 周默 | A kind of compasses easy to use |
| CN109397926A (en) * | 2019-01-07 | 2019-03-01 | 李衡屹 | Multifunctional pen |
-
2012
- 2012-06-08 CN CN 201220269698 patent/CN202702964U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103660708A (en) * | 2014-01-06 | 2014-03-26 | 但姝 | Pencil lengthening sleeve |
| CN107379823A (en) * | 2017-08-04 | 2017-11-24 | 合肥名华教育科技有限公司 | A kind of sleeve joint device of the pencil based on education |
| CN107856446A (en) * | 2017-11-16 | 2018-03-30 | 周默 | A kind of modified form compasses |
| CN107901676A (en) * | 2017-11-16 | 2018-04-13 | 周默 | A kind of multifunctional compass |
| CN107933158A (en) * | 2017-11-16 | 2018-04-20 | 周默 | A kind of compasses easy to use |
| CN107856446B (en) * | 2017-11-16 | 2020-02-14 | 周默 | Improved compasses |
| CN107901676B (en) * | 2017-11-16 | 2020-04-28 | 周默 | Multifunctional compasses |
| CN107933158B (en) * | 2017-11-16 | 2020-04-28 | 周默 | Compasses convenient to use |
| CN109397926A (en) * | 2019-01-07 | 2019-03-01 | 李衡屹 | Multifunctional pen |
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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: 20130130 Termination date: 20140608 |