Carrier device having adjustable strap and the usage thereof

Abstract

The present invention provides a carrier device having an adjustable strap comprising a carrier body, at least one strap and a reel device is provided. At least one strap movably disposed on one side of the carrier body. The reel device disposed at one side of the carrier body, the reel device having at least one spool, at least one retractable wire and a latch. The retractable wire is coiled on the spool and the latch is disposed on the reel device and releasably limits a relative movement between the retractable wire and the spool which allows an user to quickly and easily adjust the length of the strap to the desired length.

1 . A carrier device having an adjustable strap, comprising:
 a carrier body;   at least one strap movably disposed on one side of the carrier body; and   a reel device disposed on one side of the carrier body, the reel device having at least one spool, at least one retractable wire and a latch device, the retractable wire being connected to one end of the strap and being coiled on the spool, wherein the latch device is disposed on the reel device and releasably limit a relative movement between the retractable wire and the spool.   
   
   
       2 . The carrier device of  claim 1  further comprising a guiding device disposed on at least one side of the reel device and stretching to at least one side of the carrier body, the guiding device guiding the retractable wire between the reel device and the strap. 
   
   
       3 . The carrier device of  claim 1 , wherein the reel device further includes a casing, the spool includes a first spool and a second spool disposed at two sides of the carrier body, wherein the first spool and the second spool respectively has a spiral spring for storing a resilience force to rotate the first spool and the second spool and to retract the retractable wire. 
   
   
       4 . The carrier device of  claim 3 , wherein the retractable wire further includes a first retractable wire and a second retractable wire, one end of the first retractable wire movably passes through one end of the strap while the other end is fixed on the casing, one end of the second retractable wire movably passes through one end of the strap while the other end is fixed on the casing, the first retractable wire is coiled on the first spool and the second retractable wire is coiled on the second spool. 
   
   
       5 . The carrier device of  claim 1 , wherein the reel device further has a casing, the spool further includes a plurality of first teeth and at least one groove, wherein the groove is formed on a circumferential side of the spool. 
   
   
       6 . The carrier device of  claim 5 , wherein one end of the retractable wire movably passes one end of the strap to coil in the groove while another end is fixed on the casing, the retractable wire is disposed in the groove. 
   
   
       7 . The carrier device of  claim 6 , wherein one end of the strap further includes a pulley for the retractable wire to be disposed on the pulley. 
   
   
       8 . The carrier device of  claim 5 , wherein the spool further includes a spiral spring, the latch device has a plurality of second teeth corresponding to part of the first teeth, wherein the first teeth are distributed on an inner rim on one side of the spool, the spiral spring is disposed in a space opposite to the side of the spool having the first teeth. 
   
   
       9 . The carrier device of  claim 5 , wherein the casing further includes an opening and at least one guiding slot adjacent to at least one side of the opening, the latch device has at least one fin disposed on at least one lateral side of the latch device, the fin of the latch device is disposed in the guiding slot for the latch device to be movably positioned the latch device on the opening. 
   
   
       10 . A carrier device having an adjustable strap comprising:
 a carrier body;   at least one strap having two ends, the two ends of the strap are movably connected to one side of the carrier body; and   a reel device disposed at a bottom of the carrier body, the reel device having at least one spool, a first retractable wire, a second retractable wire and a latch device, the first retractable wire being connected to one of the two ends of the strap and the second retractable wire being connected to another one of the two ends of the strap, wherein the first retractable wire and the second retractable wire are coiled on the spool, the latch device is disposed on the reel device and releasably limit a relative movement between the first retractable wire and the spool and a relative movement between the second retractable wire and the spool.   
   
   
       11 . The carrier device of  claim 10  further comprising a guiding device disposed on at least one side of the reel device and stretching to at least one side of the two sides of the carrier body, the guiding device guiding a length of the first retractable wire and a length of the second retractable wire between the reel device and the strap. 
   
   
       12 . The carrier device of  claim 10 , wherein the reel device further has a casing, the spool further includes a plurality of first teeth and at least one groove, wherein the groove is formed on a circumferential side of the spool. 
   
   
       13 . The carrier device of  claim 12 , wherein one end of the first retractable wire movably passes one end of the strap to coil in the groove while another end is fixed on the casing, one end of the second retractable wire movably passes one end of the strap to coil in the groove while another end is fixed on the casing, the first retractable wire and the second retractable wire is disposed in the grooves around the spool. 
   
   
       14 . The carrier device of  claim 13 , wherein one end of the strap further includes a pulley for the retractable wire to be disposed on the pulley. 
   
   
       15 . The carrier device of  claim 12 , wherein the spool further includes a first groove and a second groove, one end of the first retractable wire is coiled in the first groove while another end is fixed on the casing, one end of the second retractable wire is coiled in the second groove while another end is fixed on the casing. 
   
   
       16 . The carrier device of  claim 15 , wherein the spool further includes a spiral spring, the latch device has a plurality of second teeth corresponding to part of the first teeth, wherein part of the first teeth are distributed on an inner rim on one side of the spool, the spiral spring is disposed in a space opposite to the side of the spool having the inner rim. 
   
   
       17 . The carrier device of  claim 12 , wherein the casing further includes an opening and at least one guiding slot adjacent to at least one side of the opening, the latch device has at least one fin disposed on at least one lateral side of the latch device, the fin is disposed in the guiding slot to movably position the latch device on the opening. 
   
   
       18 . An usage of the carrier device having an adjustable strap, wherein the carrier device further includes a carrier body, a strap movably disposed on one side of the carrier body and a reel device disposed on one side of the carrier body, the reel device has one spool, at least one retractable wire and a latch device, wherein the retractable wire is coiled on the spool, the latch device is disposed on the reel device and releasably limit a relative movement between the retractable wire and the spool, the usage includes:
 pressing the latch device to release a limit on a relative movement between the retractable wire and the spool;   adjusting a length between the strap and the carrier device; and   releasing the latch device to limit the relative movement between the retractable wire and the spool.   
   
   
       19 . The usage of  claim 18 , wherein the step of adjusting the length between the strap and the carrier device includes adjusting the strap to retract and to connect with the carrier device. 
   
   
       20 . The usage of  claim 18 , wherein the step of adjusting the length between the strap and the carrier device includes applying a force on the strap and pressing the latch device to increase the length of the strap stretching form the carrier device. 
   
   
       21 . The usage of  claim 18 , wherein the step of adjusting the length between the strap and the carrier device includes pressing the latch device and releasing a force applied on the strap for the strap to retract and to connect with the carrier device. 
   
   
       22 . The usage of  claim 18 , wherein when the strap stretches from the carrier device, two ends of the strap simultaneously stretch from the carrier device. 
   
   
       23 . The usage of  claim 18 , wherein when the step retract back to the carrier device, both ends of the strap simultaneously retract back to the carrier and connects with the carrier device.