CN201068016Y - Lengthen bushing for pencil - Google Patents
Lengthen bushing for pencil Download PDFInfo
- Publication number
- CN201068016Y CN201068016Y CNU2007200317144U CN200720031714U CN201068016Y CN 201068016 Y CN201068016 Y CN 201068016Y CN U2007200317144 U CNU2007200317144 U CN U2007200317144U CN 200720031714 U CN200720031714 U CN 200720031714U CN 201068016 Y CN201068016 Y CN 201068016Y
- Authority
- CN
- China
- Prior art keywords
- sleeve
- pencil
- thread
- outer sleeve
- sleeve pipe
- 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 provides a pencil lengthening sleeve, which is composed of an outer sleeve and an inner sleeve, the lower section of the inner wall of the outer sleeve is conic, and an internal thread is arranged on the upper section; a plastic claw with the same diameter is arranged at the front section of the outer sleeve, an outer thread matched with the inner wall thread of the outer sleeve is arranged in the middle part of the outer sleeve, and a cylindrical pipe with suitable length is arranged at the rear section of the outer sleeve. The front section of the inner sleeve is inserted into the outer sleeve, and the two parts are connected into a whole through an inner thread and an outer thread. When the pencil is inserted into the sleeve, the thread is tightly screwed. The pencil lengthening sleeve has the advantages that the structure is simple, the processing is easy, and the carryover and the using are very convenient, in addition, the utility model is suitable for the pencils with a plurality of specifications and shapes.
Description
Technical field
The utility model relates to and write or drawing appliance, what be specifically related to is a kind of connection device of writing implement.
Background technology
Pencil is that student or staff use it always as writing or drawing instrument, especially pupil and drawing worker large usage quantity.Because pencil is held with bad taking after short, use not too smoothly, even can't continue again to use, therefore there is remaining long one section pencil to be abandoned often, cause waste.
The utility model content
The purpose of this utility model is to propose a kind of pencil elongated sleeve pipe, uses short point protector to be connected on and can continue in this lengthening sleeve pipe to use.
The technical scheme that realizes above-mentioned purpose is: pencil elongated sleeve pipe, to form by outer tube and inner sleeve, and it is conical that the inwall hypomere of outer tube is, and epimere has internal thread; The leading portion of inner sleeve is that there is the external screw thread that is complementary with the outer sleeve inner wall screw thread at the middle part with the elastic claw in footpath, and back segment is the cylindrical tube of a suitable length.The leading portion of inner sleeve inserts in the outer tube, and both connect as one by internal and external threads.After pencil inserts sleeve pipe, screw screw thread, at this moment, inner sleeve moves axially, and pushes ahead, and its elastic claw draws under the active force of the conical wall of outer tube hypomere gradually, and pencil shaft is firmly grasped.Because this moment, pencil was fixed on the lengthening sleeve pipe firmly, its result has just played the effect that pencil shaft is lengthened out.
The pencil elongated sleeve structure of the utility model is simple, and easily processing is carried and used all very convenient.And it can be applicable to the pencil of plurality of specifications and profile.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is the overall structure axis view of the pencil elongated sleeve pipe of the utility model.
Fig. 2 is the end view of inner sleeve leading portion elastic claw among Fig. 1.
Among the figure: 1. outer tube, 2. internal thread, 3. inner sleeve, 4. external screw thread, 5. elastic claw.
The specific embodiment
As shown in Figure 1, it is conical that the inwall hypomere of the pencil elongated sleeve pipe outer tube 1 of the utility model is, and this conical tapering is unsuitable excessive, is advisable at 0.5-1.2 °, and this tapering can make the elastic claw 5 of inner sleeve big with the contact length of pencil shaft.Because the utility model requires pencil elongated sleeve pipe can be applicable to the pencil of plurality of specifications and profile, so the internal diameter of sleeve pipe just can not be too small.Also just because of pencil shaft is wooden, the front end of elastic claw 5 can be kept a firm hand on penholder, even is partially submerged in the penholder, and its rear section just can tightly lean against on the penholder, makes little that the spacious degree of pencil in sleeve pipe try one's best, and uses pencil and can not rock.
The back segment of inner sleeve 3 is the cylindrical tube of a suitable length.So-called suitable length is according to using object.For example, for the painter, cylindrical tube should be grown a bit; Just suitable short for the writer.The back segment of inner sleeve 3 also can be one section cylinder.Certainly, as cylindrical tube, be that body is light naturally; If cylinder, processing and fabricating are just simple relatively.
In the inner sleeve leading portion elastic claw embodiment shown in Fig. 2, elastic claw 5 is four paws types, and four pawl lobes are promptly arranged, and the cross section of four pawl lobes is a four arcs, and the diameter of a circle that this four arcs surrounded is identical with inner sleeve.Certainly elastic claw 5 can be the three-jaw type fully also, and three pawl lobes are promptly arranged.
Claims (4)
1. pencil elongated sleeve pipe, it is characterized in that: it is made up of outer tube and inner sleeve, and it is conical that the inwall hypomere of described outer tube is, and epimere has internal thread; The leading portion of described inner sleeve is that there is the external screw thread that is complementary with the outer sleeve inner wall screw thread at the middle part with the elastic claw in footpath, and back segment is the cylindrical tube of a suitable length, and the leading portion of inner sleeve inserts in the outer tube, and both connect as one by internal and external threads.
2. according to the described a kind of pencil elongated sleeve pipe of claim 1, it is characterized in that: the conical tapering of described outer sleeve inner wall hypomere is 0.5-1.2 °.
3. according to the described a kind of pencil elongated sleeve pipe of claim 1, it is characterized in that: described elastic claw is a four paws type.
4. according to the described a kind of pencil elongated sleeve pipe of claim 1, it is characterized in that: described elastic claw is a three-jaw type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200317144U CN201068016Y (en) | 2007-04-22 | 2007-04-22 | Lengthen bushing for pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200317144U CN201068016Y (en) | 2007-04-22 | 2007-04-22 | Lengthen bushing for pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201068016Y true CN201068016Y (en) | 2008-06-04 |
Family
ID=39489389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200317144U Expired - Fee Related CN201068016Y (en) | 2007-04-22 | 2007-04-22 | Lengthen bushing for pencil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201068016Y (en) |
-
2007
- 2007-04-22 CN CNU2007200317144U patent/CN201068016Y/en not_active Expired - Fee Related
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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: 20080604 |