Drawing pin having functionality of drawing back automatically

Abstract

A drawing pin having functionality of drawing back automatically is provided, which includes a containing portion and a pin portion. The pin portion is disposed in the containing portion when the pin portion is at a first location, and an appropriate part of the pin portion is exposed outside the containing portion when the pin portion is at a second location. The containing portion provides a resilient force that enables the pin portion to draw back from the second location to the first location automatically when the pin portion moves from the first location to the second location.

1 . A drawing pin having functionality of drawing back automatically, comprising:
 a containing portion; and   a pin portion, wherein the pin portion is disposed in the containing portion when the pin portion is at a first location, and an appropriate part of the pin portion is exposed outside the containing portion when the pin portion is at a second location;   wherein, the containing portion provides a resilient force that enables the pin portion to draw back from the second location to the first location automatically when the pin portion moves from the first location to the second location.   
   
   
       2 . The drawing pin having functionality of drawing back automatically according to  claim 1 , wherein the containing portion comprises an elastic part, and the elastic part provides the resilient force that enables the pin portion to draw back from the second location to the first location automatically when the pin portion moves from the first location to the second location. 
   
   
       3 . The drawing pin having functionality of drawing back automatically according to  claim 2 , wherein the elastic part is in a compressed state to produce the resilient force when the pin portion is at the second location. 
   
   
       4 . The drawing pin having functionality of drawing back automatically according to  claim 2 , wherein a material of the elastic part is an elastic rubber. 
   
   
       5 . The drawing pin having functionality of drawing back automatically according to  claim 1 , wherein the containing portion comprises an opening part, and the drawing pin further comprises:
 a base, connected to the opening part and comprising a pore part, wherein the base encloses substantially the containing portion except at the pore part;   wherein the appropriate part of the pin portion is exposed outside the containing portion through the pore part when the pin portion is at the second location.   
   
   
       6 . The drawing pin having functionality of drawing back automatically according to  claim 5 , wherein the base further comprises a guide part for guiding a moving direction of the pin portion when the pin portion moves from the first location to the second location. 
   
   
       7 . The drawing pin having functionality of drawing back automatically according to  claim 6 , wherein the guide part is further used for constraining the moving direction of the pin portion when the pin portion moves from the first location to the second location. 
   
   
       8 . The drawing pin having functionality of drawing back automatically according to  claim 6 , wherein the containing portion further comprises a depression part, and the guide part is engaged into the depression part when the pin portion is at the second location. 
   
   
       9 . The drawing pin having functionality of drawing back automatically according to  claim 5 , wherein the base has a magnetism. 
   
   
       10 . The drawing pin having functionality of drawing back automatically according to  claim 9 , further comprising:
 a receiving recess;   wherein the base is attracted to the receiving recess with the magnetism when the pin portion is at the first location.   
   
   
       11 . The drawing pin having functionality of drawing back automatically according to  claim 10 , further comprising:
 a surface layer, for encapsulate substantially the receiving recess;   wherein the surface layer is in contact with the base to provide a friction to the base when the base is attracted to the receiving recess.   
   
   
       12 . The drawing pin having functionality of drawing back automatically according to  claim 11 , wherein a material of the surface layer is a rubber. 
   
   
       13 . The drawing pin having functionality of drawing back automatically according to  claim 1 , wherein an appropriate part of a head of the pin portion is exposed outside the containing portion when the pin portion is at the second location. 
   
   
       14 . The drawing pin having functionality of drawing back automatically according to  claim 1 , wherein a tail of the pin portion is secured to the containing portion. 
   
   
       15 . The drawing pin having functionality of drawing back automatically according to  claim 14 , wherein the containing portion has a holding part, and the tail of the pin portion is secured to the holding part. 
   
   
       16 . The drawing pin having functionality of drawing back automatically according to  claim 15 , wherein a material of the holding part is a plastic. 
   
   
       17 . The drawing pin having functionality of drawing back automatically according to  claim 1 , wherein a surface of the pin portion is a non-smooth surface. 
   
   
       18 . The drawing pin having functionality of drawing back automatically according to  claim 1 , wherein a surface of the pin portion is frosted or sand blasted. 
   
   
       19 . The drawing pin having functionality of drawing back automatically according to  claim 1 , wherein when the pin portion penetrates into an object, a friction generated between the pin portion and the object is greater than or equal to the resilient force. 
   
   
       20 . The drawing pin having functionality of drawing back automatically according to  claim 1 , wherein the containing portion is substantially in a shape of a bowling pin when then pin portion is at the first location.