Spike-adjustable spiked shoe

Abstract

A spike-adjustable spiked shoe includes a plurality of anchored walls on an outsole, each having an outer convex surface and an inner concave surface. A positioning unit has an abutment head and a guided end respectively facing toward a bearing wall in the outsole and the inner concave surface, and a tapped bore segment. The abutment head is depressed when it abuts against the bearing wall, thereby generating a sufficient friction force therebetween for holding the positioning unit against the anchored wall. An adjustable spike unit includes a spike body having a tightening surface, and a tightening member secured to the spike body and having a threaded shank that is threadedly engageable with the tapped bore segment such that the spike body can be retained in a normal or adjusted position relative to the outsole.

1 . A spike-adjustable spiked shoe, comprising: 
 an upper;    a sole member having an insole disposed underneath said upper, and an outsole opposite to said insole in an upright direction, said outsole including a plurality of anchored walls, each of said anchored walls having an outer convex surface and an inner concave surface opposite to said outer convex surface in the upright direction, said outsole having a plurality of accommodation chambers, each extending from a respective one of said inner concave surfaces towards said insole to terminate at a bearing wall, said outer convex surface having an access opening which extends along a centerline and through said inner concave surface to be communicated with a respective one of said accommodation chambers;    a plurality of positioning units, each having an abutment head and a guided end which are opposite to each other along an axis that is aligned with the centerline when a respective one of said positioning units is in a normal position, and that forms an angle with the centerline when the respective one of said positioning units is in an adjusted position, and which face toward said bearing wall and said inner concave surface, respectively, said abutment head being depressed when said abutment head abuts against said bearing wall such that a sufficient friction force is generated therebetween to hold a respective one of said positioning units in one of the normal and adjusted positions, each of said positioning units having a tapped bore segment which extends from said guided end along the axis towards said abutment head; and    a plurality of adjustable spike units, each including 
 a spike body which has a bottom surface for treading on a ground surface, and a tightening surface opposite to said bottom surface along the axis, and  
 a tightening member having a connecting end secured to said spike body, and a threaded shank that is opposite to said connecting end, that extends from said tightening surface along the axis, and that terminates at a forcing end, said threaded shank being configured to threadedly engage with said tapped bore segment such that once said forcing end is brought to abut against said abutment head after said threaded shank is extended through said access opening so as to place said spike body in one of the normal and adjusted positions, said tightening surface is brought to move towards said outer convex surface, thereby ensuring the generation of the sufficient frictional force between said abutment head and said bearing wall.  
   
   
   
       2 . The spike-adjustable spiked shoe of  claim 1 , wherein said bearing wall is made from a first material that is more rigid than that of said outsole, and wherein each of said positioning units includes 
 a shiftable body having a seat end and said guided end, said seat end and said guided end being opposite to each other along the axis, said shiftable body having an insert bore that extends from said tapped bore segment through said seat end, and    said abutment head being made from a deformable material, said abutment head including an insert portion disposed in said insert bore, and said abutment portion, which is opposite to said insert portion along the axis, and which is configured such that said abutment portion is depressed and deformed when said abutment portion abuts against said bearing wall so as to generate the sufficient friction force therebetween for holding said shiftable body in one of the normal and adjusted positions.    
   
   
       3 . The spike-adjustable spiked shoe of  claim 2 , further comprising a plurality of anchoring members, each of which is made from a second material more rigid than that of said outsole, and each of which includes an engaging major surface and a tightened major surface that is opposite to said engaging major surface, and that has a through hole extending through said engaging major surface such that once said forcing end of said tightening member is brought to abut against said insert portion after said threaded shank is extended through said through hole and said access opening so as to place said spike body in one of the normal and adjusted positions, said tightening surface is brought to abut against said tightened major surface so as to force said engaging major surface to be anchored onto said outer convex surface, thereby ensuring the generation of the sufficient frictional force between said abutment portion and said bearing wall.  
   
   
       4 . The spike-adjustable spiked shoe of  claim 3 , wherein each of said anchoring members has a plurality of engaging pointed ends which are disposed on and which extend from said engaging major surface to penetrate said outer convex surface when said tightening surface abuts against said tightened major surface.  
   
   
       5 . The spike-adjustable spiked shoe of  claim 4 , further comprising a plurality of restraining mechanisms, each of which is disposed between said tightened major surface and said tightening surface such that once said tightening surface is brought into contact with said tightened major surface by virtue of screw-in movement of said threaded shank into said tapped bore segment, said restraining mechanism permits a continuous screw-in movement of said threaded shank while guarding against a screw-out rotation of said threaded shank relative to said tapped bore segment.  
   
   
       6 . The spike-adjustable spiked shoe of  claim 3 , further comprising a plurality of guiding members, each of which is disposed in a respective one of said accommodation chambers, and each of which is made from the first material, each of said guiding members having a convex attachment surface which is attached to said inner concave surface, and a concave guiding surface which is opposite to said convex attachment surface in the upright direction and which is configured to matingly engage said guided end so as to guide movement of said spike unit relative to said outsole between the normal and adjusted positions.  
   
   
       7 . The spike-adjustable spiked shoe of  claim 6 , wherein said bearing wall is integrally formed with said guiding member so as to enable said bearing wall to serve as a limit to a sliding movement of said guided end.  
   
   
       8 . The spike-adjustable spiked shoe of  claim 1 , wherein said abutment portion and said bearing wall respectively have a convex surface and a concave surface for mating with each other.