Extendable and expandable positioning structure of a trunk bag

Abstract

An extendable and expandable positioning structure of a trunk bag comprises a bag body and a movable buckling device at two sides of the bag. The bag body is divided into a bag receiving portion at the middle section thereof. The bag receiving portion has an upper bag at the upper side and a lower bag at the lower side. An inner side of the upper bag is connected to an upper box frame. The lower box frame is connected to a retaining plate and the retaining plate is installed with at least one long groove. The upper bag is connected to the sliding block. The sliding block is installed with a positioning male element at position with respect to the positioning female element so that the positioning male element is capable of being buckled to the positioning female element.

What is claimed is:  
     
         1 . An extendable and expandable positioning structure of a trunk bag comprising: 
 a bag body being divided into a bag receiving portion at the middle section thereof; the bag receiving portion having an upper bag at an upper side thereof and a lower bag at the lower side thereof; an inner side of the upper bag being connected to an upper box frame; the bag receiving portion being used as an extendable and expandable portion of the bag; and    a buckling device installed at an inner surface of at least one lateral side of the bag body, the buckling device including a retaining plate and at least one sliding block; the lower box frame being connected to a retaining plate; the retaining plate being installed with at least one long groove; the long groove being installed with at least one positioning female element; the upper bag being connected to the sliding block; the sliding block being installed with a positioning male element at position with respect to the positioning female element so that the positioning male element is capable to be buckled to the positioning female element; the thickness of the sliding block being extended out of the long groove and two outer edges of the sliding block being engaged with the surface of the retaining plate so that as the bag body is pulled, the sliding block being driven to be moved in the long groove, and thus, to position the positioning male element to move upwards so as to be buckled at another positioning female element.    
     
     
         2 . The extendable and expandable positioning structure of a trunk bag as claimed in  claim 1 , wherein an upper box frame is connected at an inner side of the upper bag of the bag body; and a lower end of the upper box frame positions the sliding block.  
     
     
         3 . The extendable and expandable positioning structure of a trunk bag as claimed in  claim 1 , wherein a lower box frame is connected within the lower bag of the bag body; an upper end of the lower box frame is positioned with a positioning plate.  
     
     
         4 . The extendable and expandable positioning structure of a trunk bag as claimed in  claim 1 , wherein the positioning female element is a positioning buckling hole on the long groove of the retaining plate; the positioning male element is an elastic buckle on the sliding block.  
     
     
         5 . The extendable and expandable positioning structure of a trunk bag as claimed in  claim 4 , wherein the elastic buckle of the positioning male element is installed at a middle position at two lateral surfaces of the sliding block; the middle position is a groove, a piece shape protruded buckle is installed in the groove; the protruded buckle extends from above a side of the groove to another side, but not to be connected with another side; a hook head is protruded from a distal end of the protruded buckle; and the protruded buckle is positioned in the positioning buckling groove through the hook head.  
     
     
         6 . The extendable and expandable positioning structure of a trunk bag as claimed in  claim 4 , wherein the positioning buckling grooves in the long groove of the retaining plate is installed at two lateral sides.  
     
     
         7 . The extendable and expandable positioning structure of a trunk bag as claimed in  claim 1 , wherein the positioning female element is a positioning buckling groove at the long groove of the retaining plate; the positioning male element is at least one elastic buckling bead on the sliding block.  
     
     
         8 . The extendable and expandable positioning structure of a trunk bag as claimed in  claim 7 , wherein the elastic bead of the positioning male element is installed at a middle portion of the lateral surface of the bag body facing to the bag; at the lateral surface of the sliding block against the bag is installed with a retaining groove two lateral surface of which each are installed with a bead hole; the retaining groove is placed with a spring, thereby, part of each bead is protruded out from the bead hole.  
     
     
         9 . The extendable and expandable positioning structure of a trunk bag as claimed in  claim 8 , wherein the positioning buckling groove on the long groove of the retaining plate is installed at an edge of the two sides and is concave.  
     
     
         10 . The extendable and expandable positioning structure of a trunk bag as claimed in  claim 10 , wherein the positioning female element is a positioning buckling leg on the long groove of the retaining plate; and the positioning male element is a protruded buckle on the sliding block.  
     
     
         11 . The extendable and expandable positioning structure of a trunk bag as claimed in  claim 10 , wherein the protruded buckle on the positioning male element is installed at a top of the sliding block, and the top of the sliding block has a protruded buckle like a piece; two lateral surfaces of the protruded buckle like a piece each is installed with a protrusion.  
     
     
         12 . The extendable and expandable positioning structure of a trunk bag as claimed in  claim 11 , wherein the positioning buckling leg of the positioning female element is installed at a top on an inner edge of the long groove of the retaining plate; there are a pair of positioning buckling legs; each of the positioning buckling leg is installed with a buckling groove; and the buckling groove of the positioning buckling leg serves to buckle the protrusion of the protruded buckle.  
     
     
         13 . The extendable and expandable positioning structure of a trunk bag as claimed in  claim 1 , wherein a lower end of the sliding block is connected to an inserting rod; a spring covers around the inserting rod; an upper end of the spring is positioned; a rod groove is installed on the long groove; when the sliding block moves downwards and positioned, an inserting rod is inserted into the rod groove; and the spring is compressed out of the rod groove.