Abstract:
A strap shoe. The shoe includes an outsole, a retaining piece, a strap, and a pad. The outsole is provided in the upper side with a receiving slot for receiving the retaining piece which is provided in the upper side with strap slots. The strap is provided with engagement pieces and is detachably fastened to the retaining piece such that the engagement pieces of the strap are removably retained in the strap slots of the retaining piece.

Description:
FIELD OF THE INVENTION 
     The present invention relates to an improved shoe with interchangeable vamps, especially for a shoe structure provided with interchangeable combinations and styles of vamps. 
     BACKGROUND OF THE INVENTION 
     In the related prior art, the connected portion between a shoe board and a vamp, including sandals, sports shoes or shoes made of cotton, etc., is permanently sealed so that one cannot change the styles and patterns of the shoe. U.S. Pat. No. 6,418,643 discloses a shoe structure provided with interchangeable accessories.  FIG. 1  of the application illustrates the features of U.S. Pat. No. 6,418,643, wherein the shoe board  1  includes a plurality of receiving spaces  1   a  which receive a plurality of separation pieces  2 , therein. On the edges of the vamps  3  there are retaining pieces  4 , which can be buckled and fixed into the separation pieces  2  in order to connect the shoe board  1  and the vamps  3 . The separation pieces  2  are connected to bases  2   a  respectively. 
     A shoe pad  5  is positioned above the shoe board  1 . Another shoe pad  6  is positioned over the shoe pad  5  and fixed to the shoe pad  5 . Although different styles or types of vamps  3  can be individually connected with the shoe board  1 , there are deficiencies, detailed as follows. 
     In the prior art device, such device is suitable for sandal structures, but not for various shoes such as sports shoes, leather shoes, and informal footwear in which the feet are totally wrapped. Therefore, the vamps of shoes that require the total covering of feet that are currently on sale, such as informal footwear and shoes made of cotton, etc. are not interchangeable. Further, prior art shoes having interchangeable vamps position the vamps at the front of the shoe, resulting in easily broken pieces between the shoe board and the vamp. There is a need for minimizing the deficiencies of the prior art. 
     SUMMARY OF THE INVENTION 
     The inventive shoe structure includes a fixing and buckling device, supplemental fixing and buckling devices positioned between the shoe board and the vamp. The fixing and buckling device includes a push piece, covering board and a buckling board. The push piece and covering board are set up in the inner side of the shoe board, especially at the edges of the push piece. There are fixing board pillars and long holes on the surface of the covering board. 
     The buckling board is fixed at the bottom of the vamp. At a back rib, there is a plurality of square-shaped buckling devices. By installing the buckling devices in the long holes, one can push the fixing board pillar of the push piece and fix with the buckling device. The supplemental fixing device includes a buckling base and a square-shaped buckling board, positioned at the side between the shoe board and the vamp. Thereby, different styles of vamps can be detachably connected with the shoe board, having a strong attachment. 
     A primary objective of the present invention is to provide a shoe structure with interchangeable vamps. The inventive device includes a push piece, covering board and a buckling board positioned between the shoe board and the front of the vamp. The push piece and the covering board are set up on the inner side of the shoe board and primarily set up with a plurality of fixing board pillars at each side rib, with a plurality of long holes on the board surface of the cover board. The buckling board is positioned at the bottom portion of the vamp. The back rib of the buckling board is configured with a plurality of square-shaped buckling bases. By fixing the buckling bases into the long holes, the fixing board pillar on the push piece can be pushed and fixed with the buckling base so as to combine the fully foot wrapped-type vamp with the shoe board. 
     Another object of the invention is to provide a plurality of buckling bases at both edges positioned behind the board, and the backside behind the vamp is provided with square-shaped pieces that are to be buckled with the buckling base, on which there are ribs and the square-shaped piece includes a rib piece. With the combination of the square-shaped piece and the buckling base, the combination between the vamp and the shoe board will become strengthened and fixed. 
     The features and the advantages of the present invention will be more readily understood from the reading of the following detailed description of the preferred embodiments of the present invention, with reference to the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows an exploded view of the prior art; 
         FIG. 2  illustrates a combined, perspective view of the present invention; 
         FIG. 3  is an exploded view of the present invention; 
         FIG. 4  is a partially exploded view of an inverted vamp and the buckling board; 
         FIG. 5  is a partial cross-sectional view of a front portion of the inventive device; 
         FIG. 6  is a cross-sectional view of the supplemental fixing and buckling device; 
         FIG. 7  illustrates a front schematic view of the fixing and buckling device of the present invention; 
         FIG. 8  illustrates a rear schematic view of the fixing and buckling device of the present invention; 
         FIG. 9  is a perspective view of another type of vamp; 
         FIG. 10  is a perspective view of the second type of vamp in combination with a shoe board; 
         FIG. 11  is a perspective view of a third type of vamp; 
         FIG. 12  is a perspective view of the third type of vamp in combination with the shoe board; 
         FIG. 13  is a perspective view of a fourth type of vamp; 
         FIG. 14  is a perspective view of a fourth type of vamp in combination with the shoe board; 
         FIG. 15  is an exploded view of another example of the present invention; 
         FIG. 16  is a perspective view of the second example of the present invention. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     With reference to  FIGS. 2-6 , the present invention includes a shoe board  10 , a shoe pad  20  and a vamp  30 , a fixing buckling device  40  positioned between the shoe board  10  and the vamp  30  and supplemental fixing buckling bases  50 , which enable the shoe board  10  and the vamps  30  to be disassembled and recombined to enable different combinations. The shoe board  10  is a shoe-shaped base, on which there are fixing holes  11 , and its inner side is provided with components to combine with the fixing buckling devices  40  and the supplemental fixing buckling devices  40  and the supplemental fixing buckling bases  50 . 
     The shoe pad  20  is of a smaller relative shoe shape in comparison to the shoe board  10 . The shoe pad  20  is provided on its back edge with fixing pillars  21 , which can be fixed into the fixing hole  11  on the shoe board  10  in order to fix the shoe pad  20  on the upper of the shoe board  10 , and in order to replace the shoe pad  20 . The shoe pad  20  is provided with a strap  22  at a back side thereof. 
     The vamp  30  has a shoe shape with coverings at side edges thereof. The bottom portion of the vamp  30  includes a fixing function between the fixing buckling device  40  and the supplemental fixing buckling base  50 . 
     The fixing buckling device  40  includes a put-in base  41 , a push piece  42 , a covering board  43  and a buckling board  44 . 
     The put-in base  41  has a tub piece shape that is provided at the front of the inner side of the shoe board  10  and is provided with a defining piece  411  that is used for the fixing of the push piece  41 . 
     The push piece  42  is of a rectangular shape, as shown in FIG.  3 . The push piece  42  is provided with a hollow part  422  that is fixed over the defining piece  411  in order to allow the push piece  42  to slip into the put-in base  41 , as illustrated in FIG.  3 . Side edges of the push piece  42  are provided with fixing board pillars  421 . 
     The covering board  42  covers over the push piece  42  in relation to the put-in base  41 . A portion of the covering board  43  that faces the fixing board  42  is provided with long holes  431 . 
     The buckling board  44  is fixed to a bottom portion of the vamp  30 , as illustrated in FIG.  4 . The long holes  431  of the covering board  43  receive the square-shaped buckling bases  441  of the buckling board  44 . The center portion of the square-shaped buckling bases  441  is hollow and the outer portion thereof is configured to be secured in the long holes  431 . 
     The supplemental fixing buckling bases  50  each include a buckling base  51  and a square-shaped buckling board  52 . At both the side and the rear of the shoe board  10  are provided with a buckling base  51  in a shoe shape, with the inner side thereof provided with a buckling piece  511  and formed with a rib  512  on the buckling piece  511 . The square-shaped buckling board  52  is fixed in the central and back portions of the vamp  30 , on which inner sides thereof are provided with a rib piece  521 , which can be buckled and fixed with the rib  512  when the square-shaped buckling board  52  is buckled in the buckling base  51 . 
     Thus, one can easily combine and disassemble the vamp  30 , in order to interchange the informal footwear, cotton shoes, etc., in a foot wrapped configuration with the shoe board  10 , to enhance the strength of the combination of the vamp  30  to the shoe board  10 , and facilitating the convenient assembly thereof. 
     With regard to  FIGS. 7 and 8 , each of the components of the fixing buckling device  40  and the supplemental fixing buckling bases  50  is provided at the pre-fixing position of the vamp  30  with the shoe board  10 , placing the buckling set  441  on the vamp  30  into the long hole  431  of the board  43  and pushing the push piece  42  therein to let the fixing board pillar  422  of the push piece  42  to fix into the hollow part of the buckling set  441  and permit the buckling set  441  to release from the long hole  431 . Thus, the shoe board  10  and the vamp  30  can be combined. The square-shaped buckling boards  52  of the vamp  30  are buckled into the buckling base  51  in order to completely combine the central and back portions between the shoe board  10  and the vamp  30 . Finally, the shoe pad  20  is inserted onto the shoe board  10  of the vamp  30 . 
     As illustrated in  FIG. 6 , when the square or rectangular shaped buckling board  52  is buckled into the buckling base  51 , the buckling piece  511  and the rib  512  on the buckling piece  511  are combined as a combination structure that is wedged and stuck with the rib piece  521  of the buckling board  52 , intensifying the combination. Further, such combination will be more convenient and quicker to assemble and disassemble the vamp  30  and the shoe board  10 . 
     Further, when disassembling and replacing the vamp  30 , one first pulls the strap  22  on the shoe pad  20  and takes out the shoe pad  20 . Then, the square-shaped buckling board  52  is separated from the buckling base  51 . The fixing buckling device  40  allows the push piece  42  to be pushed in an opposite direction so that the buckling set  441  will depart from the long hole  431 . Thus, the vamp  30  will separate from the shoe board  10 . In addition, when the square-shaped buckling board  52  is separated from the buckling base  51 , one only needs to pull and twist gently in order to disassemble the vamp  30  in a fast and convenient manner. 
     With regard to  FIGS. 9-14 , a major feature of the present invention is to permit interchanging various styles of vamps  30 . The present invention can be utilized for vamps having fully foot-wrapped structures, as illustrated in  FIGS. 9 and 10 , or semi-wrapped wrapped structures, as illustrated in  FIGS. 11-14 , permitting the user to have numerous choices for wearing footwear. In addition, the shoe board  10  can be used with a variety of colors and styles for vamps  30 . 
     In addition, the buckling base  51  of the supplemental fixing buckling base  50  can be applied on a board base having the arrangement of a shoe pattern or can be applied elsewhere on the shoe board  10  in an individual or pair type arrangement, or further applied on the covering board  43  of the fixing buckling device  40  to locate a vamp  30  of a sandal assembly. With reference to  FIGS. 3 ,  15  and  16 , sides of the covering board  43  of the fixing buckling device  40  can be provided with the buckling base  51 . Thus, when a user wishes to change the vamp  30  of a sandal style shoe, one can directly buckle the square-shaped board  52  on the vamp  30  into the proper buckling bases  51  and then put the shoe pad  20  on the shoe board  10 . In this manner, a user can change the foot wrapped style shoe into a sandal type shoe.  FIGS. 15 and 16  illustrate a sandal styled vamp  30  buckled to a shoe board  10 . The quantity and position of the square-shaped buckling board  52  can be adjusted according to the patterns and styles of the vamp  30 .