Abstract:
A handgrip for bicycle includes a body including a first end, a second end, and a light reflection portion covering thereon between the first and second ends, a sheath mounted on the light reflection portion, a lamp device installed on an end of the sheath adjacent to the second end of the body, and a switch device installed to the body and electrically connected to the lamp device.

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a handgrip with a lamp apparatus for bicycle. 
   2. Description of the Related Art 
   A conventional handgrip as shown in reference Taiwan Patent NO M298566, meanwhile, the handgrip composes of a transparent sheath and a lamp unit. The lamp unit is disposed in an end of the interior of the transparent sheath as to make the handgrip to be decorative for signal. 
   However, the lamp unit is installed in the handgrip so that the size of the lamp unit is limited by the handgrip. 
   Further, the lamp unit is disposed in the interior of the sheath so that the light of the lamp is easily hid behind the sheath and it causes a bad effect of signal. Additionally, the lamp unit is preferred to be electronic product. Such lamp unit is easy to be broken if placing the lamp unit out of the sheath and making the lamp unit to be exposed. Moreover, to place the lamp unit inside of the sheath may cause difficult maintenance and of the lamp device and replacement of the batteries of the lamp device. 
   The present invention is therefore intended to obviate or at least alleviate the problems encountered in prior art. 
   SUMMARY OF THE INVENTION 
   Accordingly, the object is achieved by providing a handgrip for bicycle that includes a body, a sheath, a lamp device and a switch device. The sheath is mounted on the body. The lamp device is disposed on the second end of the sheath. The lamp device further includes a plurality of lamp elements disposed on the first and second sides respectively. The body further includes a light reflection portion defined between the body and the sheath and adapted to reflect the light that lights up the body to the sheath so that the sheath is allowed to light outward. 
   Other objects and advantages of the present invention will become apparent from the following detailed description when views in conjunction with the accompanying drawings, which set forth certain embodiment of the invention. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The present invention will be described via detailed illustration of the preferred embodiment referring to the drawings. 
       FIG. 1  is a perspective view of a handgrip with a lamp apparatus for bicycle according to the preferred embodiment of the present invention. 
       FIG. 2  is an exploded view of the handgrip shown in  FIG. 1 . 
       FIG. 3  is another perspective view of the handgrip shown in  FIG. 1 ; illustrating both the first and second sides of the lamp unit are lighted. 
       FIG. 4  is another perspective view of the handgrip shown in  FIG. 1 ; illustrating the first side of the lamp unit is lighted. 
       FIG. 5  is another perspective view of the handgrip shown in  FIG. 1 ; illustrating the second side of the lamp unit is lighted. 
       FIG. 6  is a perspective view of two handgrips which are used to be mounted onto two handle bars of a bicycle respectively. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   Referring to  FIGS. 1 and 2 , a handgrip  10  for a bicycle in accordance with a preferred embodiment in the present invention includes a body  20 , a sheath  30 , a lamp device  40  and a switch device  50 . 
   The body  20  is formed as a hollow cylinder and includes a first end  22 , a second end  23 , an outer periphery  21  defined between the first and second ends  22 ,  23  and a light reflection portion  24  wrapping around or applying to the outer periphery  21 . A through-hole  221  is formed on the rim of the first end  22  for installation of the switch device  50 . A plurality of limited portion  231  is defined on the inner surface of the rim of the second end  23  for installation of the lamp device  40 . 
   The sheath  30  is provided for putting on the body  20  and includes a first end  31  and a second end  32 . A first flange  33  and a second flange  34  respectively define on the first and second ends  31 ,  32 . The first and second flanges  33 ,  34  are ergonomic-designed and provide a comfortable use when a user holds on the sheath  30 . A connecting portion  35  is defined on the second end  32  of the sheath  30  and adapted to receive the lamp device  40 . A plurality of bores  36  are aligned around the connecting portion  35 , with each bore  36  being longitudinally formed on the second end  32 . The material of the sheath  30  is made of transparent plastics or rubber so that the sheath  30  is changeable to suit to various sizes of the lamp device  40  and the handgrip  10 . Further, on the sheath  30 , there could be set some desired designs with differ transmittance as to increase aesthetic perception of the sheath  30 . 
   The lamp device  40  includes a lamp unit  41 , a light gathering element  42  and a lamp lid  43 . The lamp lid  43  is made of plastic and has several of fastening portion  431 . 
   The lamp unit  41  includes a first side  411  toward the first end  31  of the sheath  30 , a second side  412  opposite to the first side  411  and a plurality of apertures  413  defined on the rim thereof. The apertures  413  correspond to the fastening portions  431  of the lamp lid  43  and the limited portions  231  of the second end  23  of the body  20  so that each fastening portion  431  of the lamp lid  43  is adapted to insert through the related aperture  413  to engage with the related limited portion  231  of the body  20  for fixing the lamp unit  41  and the light gathering element  42  in the connecting portion  35  of the sheath  30 . The first side  411  is connected to the connecting portion  35  of the sheath  30 . Several of lamp elements  414  are disposed on the first and second sides  411  and  412  respectively. The lamp elements  414  on the first side  411  is received in the bores  36  as to prevent said lamp elements  414  being broken by external force because that the bores  36  is located in the second flange  34 . 
   The lamp unit  41  not only lights toward the first side  411  for lighting the sheath  30  but lights toward the second side  412  for lighting the lamp lid  43 . The light reflection portion  24  of the body  20  can reflect the light of the lamp elements  414  of the first side  41  to the sheath  30  as to enhance the illumination of the sheath  30 . Moreover, the light reflection portion  24  allows decreasing the amount of the lamp elements  414  of the first side  41 ; hence, it can save power for supplying the lamp elements  414  of the first side  41 . Users can operate the lamp device  40  for more long time with the same batteries. In addition, it can reduce the generation of heat energy and prevent users feeling that the handgrip  10  is overheated in use. On the contrary, if the amount of the lamp elements  414  of the first side  411  is maintained invariably, the light reflection portion  24  allows increasing the illumination of the light reflected to the sheath  30  from the lamp elements  414  of the first side  411 . It can make the lamp device  40  to have better effect. 
   The light gathering element  42  is connected to the second side  412  of the lamp unit  41  and includes a first surface  422  toward the second side  412 , a second surface  423  opposite to the first surface  422  and a plurality of through-holes  421 . Each through-hole  421  is defined through the first and second surfaces  422 ,  423  and allows the lamp elements  414  which are disposed on the second side  412  of the lamp unit  41  to insert through. The first surface  422  abuts against the second side  412  of the lamp unit  41 . A semi-circular cavity  424  is defined on the second surface  423  and full applied with light reflection material, thus, the cavity  424  can reflect the light from the lamp elements  414  of the second side  412  of the lamp unit  41  as to increase the illumination of the lamp lid  43  of the lamp device  40 . 
   The light of the lamp device  40  can travel toward the sheath  30  or the lamp lid  43  or both the sheath  30  and the lamp lid  43  so that users can operate the handgrip  10  in various conditions. 
   The switch device  50  is preferred to be a multiplex switch and communicates with the lamp unit  41  by a cord  51 . The switch device  50  is a conventional structure and not the emphasis in the present invention; therefore, it would not further describe the switch device  50  in great detail. 
   Referring to  FIGS. 3 through 5 , the multiplex switch device  50  can be operated to switch either the power switch or the light conditions of the lamp device  40  (i.e. the lamp elements  414  of the first side  41  of the lamp unit  41  are operated to light only; or the lamp elements  414  of the second side  42  of the lamp unit  41  are operated to light only; or both the lamp elements  414  of the first and second sides  41 ,  42  of the lamp unit  41  are operated to light.) 
   Referring to  FIG. 6 , it shows two handgrips  10  in accordance with the present invention is provided to be mounted on two handle bars of a bicycle. Users can hold on the handgrips  10  while riding the bicycle (not shown). According to the functions of the switch device  50 , while the handgrip  10  is used to be mounted on the handle bar of the bicycle, the handgrip  10  can also be a turn signal. Furthermore, the lamp lid  43  of the handgrip  10  which is adapted to be turn signal is preferred to be transparent plastic with bright colors.