Retaining structure for removably mounting a surfboard fin

Abstract

A retaining structure for a surfboard fin includes a mounting base secured in the undersurface of a surfboard, a fin member and two blocks. The mounting base has a receptacle and two holding portions. The fin member has a connecting section to be embedded in the receptacle of the mounting base and a body section extending from the connecting section. The body section of the fin member protrudes outside the undersurface of the surfboard and has front and rear ends inclined outwardly. Each block is detachably mounted on the respective holding portion of the mounting base and defines a recess in a side according to the slope of the respective inclined end of the body section so that the inclined ends of the body section can be fitted in the recesses of the blocks and suppressed by the blocks and thereby be secured onto the mounting base.

1 . A retaining structure for removably mounting a surfboard fin comprising:
 a mounting base firmly secured within a cavity in the undersurface of a surfboard; the mounting base having a receptacle and two holding portions adjacent to opposite ends of the receptacle;   a fin member having a connecting section to be embedded in the receptacle of the mounting base and a body section extending from the connecting section, the body section protruding outside the undersurface of the surfboard and having front and rear ends inclined outwardly; and   two suppressing mechanisms each detachably mounted on the respective holding portion of the mounting base and each including a block, wherein one of the blocks defines a recess in a side thereof according to the slope of the inclined front end of the body section of the fin member while the other block defines a recess in a side thereof according to the slope of the inclined rear end of the body section in such a way that the inclined front and rear ends of the body section can be fitted in the recesses of the blocks and suppressed by the blocks and thereby be secured onto the mounting base.   
   
   
       2 . The retaining structure of  claim 1  wherein each of the two holding portions of the mounting base defines a fixing hole therein; each of the suppressing mechanisms includes a block defining a through hole from top to bottom and a fixing part configured to pass through the through hole of the block and be releasably locked in the fixing hole in order to secure the block onto the respective holding portion of the mounting base and thereby enable the block to suppress the fin member. 
   
   
       3 . The retaining structure of  claim 2  wherein the mounting base includes a base portion having the holding portions thereon and a patch plate shaped to fit for the base portion; the receptacle of the mounting base passes through the patch plate and into the base portion; and when the base portion is coupled with the patch plate, the receptacle and the holding portions are exposed in an opening of the patch plate. 
   
   
       4 . A retaining structure for removably mounting a surfboard fin comprising:
 a mounting base firmly secured within a cavity in the undersurface of a surfboard; the mounting base having a receptacle and a holding portion defining a fixing hole therein;   a fin member having a connecting section to be embedded in the receptacle of the mounting base and a body section extending from the connecting section, the body section protruding outside the undersurface of the surfboard;   a first block integrated with the mounting base and provided to suppress one end of the body section of the fin member;   a second block defining a through hole from top to bottom; and   a fixing part configured to pass through the through hole of the second block and be releasably locked in the fixing hole of the holding portion in order to secure the second block onto the holding portion and thereby enable the second block to suppress the other end of the body section of the fin member.   
   
   
       5 . The retaining structure of  claim 4  wherein the two ends of the body section of the fin member are inclined outwardly and each of the first and second blocks defines a recess in a side thereof according to the slope of the respective inclined end of the body section of the fin member in such a way that one inclined end of the body section can be fitted in the recess of the first block and suppressed by the first block which is integrated with the mounting base while the other inclined end of the body section is fitted in the recess of the second block and is suppressed by the second block which is secured on the mounting base by the fixing part. 
   
   
       6 . The retaining structure of  claim 5  wherein the fixing part is a screw and the fixing hole defined in the holding portion is threaded. 
   
   
       7 . A retaining structure for removably mounting a surfboard fin comprising:
 a mounting base firmly secured within a cavity in the undersurface of a surfboard; the mounting base having a receptacle and two holding portions adjacent to opposite ends of the receptacle;   a fin member having a connecting section to be embedded in the receptacle of the mounting base and a body section extending from the connecting section, the body section protruding outside the undersurface of the surfboard, wherein the connecting section has a width slightly greater than the body section to such an extent that the front and rear ends of the connecting section extends outside the front and rear ends of the body section respectively;   two blocks each defining a through hole from top to bottom; and   two fixing parts configured to pass through the through holes of the blocks and be releasably locked in the fixing holes of the holding portions in order to secure the blocks onto the holding portions of the mounting base and thereby enable the blocks to suppress the front and rear ends of the connecting section of the fin member.   
   
   
       8 . The retaining structure of  claim 7  wherein the fixing parts are screws and the fixing holes defined in the holding portions are threaded.