CN202147505U - Extension rod for pencil - Google Patents
Extension rod for pencil Download PDFInfo
- Publication number
- CN202147505U CN202147505U CN201120286536U CN201120286536U CN202147505U CN 202147505 U CN202147505 U CN 202147505U CN 201120286536 U CN201120286536 U CN 201120286536U CN 201120286536 U CN201120286536 U CN 201120286536U CN 202147505 U CN202147505 U CN 202147505U
- Authority
- CN
- China
- Prior art keywords
- tube
- pencil
- extension rod
- placket
- slide
- 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
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- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Abstract
An extension rod for a pencil adopts a tube-in-tube structure, and comprises a front tube, a middle tube and a rear tube, wherein the diameter of the front tube is larger than that of the middle tube; the diameter of the middle tube is larger than that of the rear tube; the rear tube is arranged in the middle tube and can slide in the middle tube; the middle tube is arranged in the front tube and can slide in the front tube; each two matched tubes are spaced through protrusions at the end parts; a middle partition is arranged in the middle of the inner cavity of the front tube; the front tube on one side of the middle partition is matched with the middle tube; and the other side of the middle partition is in interference fit with a pencil. The principle of the extension rod is the same as that of an extractable antenna, resistance is generated during the sliding of the tubes, and the pencil is lengthened when the extension rod is stretched, so that the head of the pencil can be hold more conveniently, the service life of the pencil can be prolonged, and the resource can be utilized better.
Description
Technical field
The utility model relates to a kind of pencil pencil extension rod of service time that increases.
Background technology
Wood pencil is the most frequently used stationery of students in middle and primary schools, but uses shorter and shorter that pencil is cut after a period of time, is inconvenient to hold and pinches, and such pencil often is dropped, and has caused unnecessary waste.
The utility model content
The purpose of the utility model provides a kind of pencil extension rod that utilizes pencil stub more.
For realizing above-mentioned purpose, the technical scheme of the utility model is following:
A kind of pencil extension rod; It is characterized in that: the pencil extension rod is a telescoping structure; It is made up of placket, middle tube, back tube, and placket, middle tube, back tube diameter reduce successively, and the back tube places in the tube and can slide at tube; Middle tube places placket and can slide at placket, and the cylindrical shell that cooperates in twos is protruding spacing through the end; Before tube inner chamber middle part separated in being designed with, in cooperate opposite side and pencil interference fit at a distance from the placket of a side with middle.
This principle of device is identical with the drawing and pulling type antenna, and cylindrical shell has damping when sliding, and after extension rod is elongated, pencil is played the prolongation effect, and gripping of Convenient pencil head can increase the service time of pencil, the better utilization resource.
Description of drawings
Fig. 1 is the structural representation of the utility model.
The specific embodiment
As shown in Figure 1; A kind of pencil extension rod; The pencil extension rod is a telescoping structure; It is made up of placket 2, middle tube 3, back tube 4; Placket 2, middle tube 3, back tube 4 diameters reduce successively; Back tube 4 places in the tube 3 and can slide at tube 3, and middle tube 3 places placket 2 and can slide at placket 2, and the cylindrical shell of Pei Heing passes through the protruding spacing of end in twos; Separated during placket 2 inner chambers middle parts is designed with, in cooperate opposite side and pencil 1 interference fit at a distance from the placket of a side with middle 3.
Claims (1)
1. pencil extension rod; It is characterized in that: the pencil extension rod is a telescoping structure; It is made up of placket (2), middle tube (3), back tube (4), and placket (2), middle tube (3), back tube (4) diameter reduce successively, and back tube (4) places in the tube (3) and can slide at tube (3); Middle tube (3) places placket (2) and can slide at placket (2), and the cylindrical shell that cooperates in twos passes through the protruding spacing of end; Separated during placket (2) inner chamber middle part is designed with, in cooperate opposite side and pencil (1) interference fit at a distance from the placket of a side with middle (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120286536U CN202147505U (en) | 2011-08-03 | 2011-08-03 | Extension rod for pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120286536U CN202147505U (en) | 2011-08-03 | 2011-08-03 | Extension rod for pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202147505U true CN202147505U (en) | 2012-02-22 |
Family
ID=45588578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120286536U Expired - Fee Related CN202147505U (en) | 2011-08-03 | 2011-08-03 | Extension rod for pencil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202147505U (en) |
-
2011
- 2011-08-03 CN CN201120286536U patent/CN202147505U/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: 20120222 Termination date: 20120803 |