Abstract:
A pen having a decoration includes a decoration on a penholder. The decoration contains an illuminator. When the decoration rotates, the illuminator emits light. On the other hand, upon writing with the pen, the illuminator emits the light as well. Therefore, the illuminator will emit the light by this dual switch.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    a) Field of the Invention The present invention relates to a pen having a decoration, and more particularly to a pen having a decoration wherein the decoration can emit light when a nib is touched or the decoration rotates. 
         [0002]    b) Description of the Prior Art 
         [0003]    An ordinary pen is only capable of writing. Therefore, some vendor has developed a light pen, where a nib can emit light when the nib is touched; whereas, other vendor has provided a non-illuminating decoration on a pen. However, all the aforementioned pens only have a single function and are not able to provide a dual effects that the decoration will illuminate when the decoration spins or the nib is touched. 
       SUMMARY OF THE INVENTION 
       [0004]    The primary object of the present invention is to provide a pen having a decoration. A penholder of the pen is provided with a decoration, when the decoration rotates, the decoration can be controlled to illuminate or not to illuminate, and when a nib is touched, the decoration can illuminate as well. 
         [0005]    To enable a further understanding of the said objectives and the technological methods of the invention herein, the brief description of the drawings below is followed by the detailed description of the preferred embodiments. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0006]      FIG. 1  shows an external view according to the present invention. 
           [0007]      FIG. 2  shows an exploded view according to the present invention. 
           [0008]      FIG. 3  shows a cross-sectional view according to the present invention. 
           [0009]      FIG. 4  shows a schematic view of an embodiment according to the present invention. 
           [0010]      FIG. 5  shows a schematic view of another embodiment according to the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0011]    Referring to  FIGS. 1 to 3 , the present invention comprises a penholder  10 , a refill  20 , a socket  30 , a decoration  40  and an illuminator  50 , wherein the refill  20  is inserted into a through-hole  11  of the penholder  10 , a nib  21  at an end of the refill  20  is protruded out of the penholder  10 , an end of the penholder  10  is sheathed with a pen cap  12 , the other end of the penholder  10  is sheathed with the socket  30 , the refill  20  transfixes through the socket  30 , the decoration  40  is latched on the socket  30  and the illuminator  50  is emplaced in the decoration  40 . 
         [0012]    The illuminator  50  includes a lift plate  51 , a spring  52 , a battery holder  53 , two batteries  54 , a lamp holder  55  and an LED  56 . The lift plate  51  is provided in the socket  30 , above the lift plate  51  is provided with the spring  52  on which is sheathed with the battery holder  53 , and an interior of the battery holder  53  is emplaced with the two batteries  54 . The lamp holder  55 , which is connected with the LED  56 , is latched on a top end of the battery holder  53 , wherein a bottom pin  561  of the LED  56  constantly contacts with the batteries  54 , a side pin  562  constantly contacts with the spring  52 , and the LED  56  is extended into an LED chamber  41  of the decoration  40 . 
         [0013]    Referring to  FIG. 4 , an inner rim of the socket  30  is provided with a holding chamber  31 , corner edges in the holding chamber  31  are provided respectively with a stop strip  311 ,  312 , side edges of the stop strips  311 ,  312  are provided respectively with a slope-shape ring  3111 ,  3121 , two wings  511  of the lift plate  51  are emplaced in the holding chamber  31 , and two lock slots  42  at a bottom end of the decoration  40  are locked at the two wings  511  of the lift plate  51 . Referring to  FIG. 4 , when the decoration rotates  40 , the two wings  511  of the lift plate  51  will be driven to move upward along the slope-shape rings  3111 ,  3121  in the socket  30 , until touching the two stop strips  311 ,  312 . Whereas, ascending of the lift plate  51  also allows a contact  521  which is extended by compressing a bottom end of the spring  52  to touch the batteries  54 , thereby making the LED  56  to illuminate by conducting a circuit. On the contrary, when the decoration  40  rotates counterclockwise, the two wings  511  of the lift plate  51  will be driven to move down along the slope-shape rings  3111 ,  3121 , allowing the contact  521  of the spring  52  not to touch the batteries  54 , thereby extinguishing the LED  56  by shutting down the circuit. 
         [0014]    Referring to  FIG. 5 , when writing, the nib  21  drives the refill  20  to move upward, allowing the refill  20  to push directly the lift plate  51  to compress the bottom end of the spring  52  that the contact  521  will touch the batteries  54 , thereby making the LED  56  to illuminate by conducting a circuit. When the writing stops, as the nib  21  does not drive the refill  20  to move upward, the refill  20  will not push upward the lift plate  51  to compress the bottom end of the spring  52  that the contact  521  will not touch the batteries  54 , thereby extinguishing the LED  56  by shutting down the circuit. 
         [0015]    Conclusive from the above, in accordance with the present invention, the pen is provided with the decoration, wherein when the decoration rotates, the illuminator will emit light, and when the pen is being used for writing, the illuminator will emit the light as well. 
         [0016]    It is of course to be understood that the embodiments described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.