Patent ID: 7785210

Claim:
A wrist protection device for a bowling game, comprising: a wrist mounted plate in which an intermediate plate and a hand back support plate are connected at a front end of the wrist mounted plate using a pin; an adjusting pin which includes an apex, a concave portion, and a support; a casing which is attached to an upper surface of an intermediate plate using a bolt, with the intermediate plate being connected with the wrist mounted plate using the adjusting pin and includes a smooth concave elongated hole having scales on its upper surface, a plurality of button holes, and two ascending and descending grooves formed at both side surfaces; a button which passes through an interior of the casing through the button hole and includes legs downwardly extending from its four corners, with each leg being provided with a groove and a distortion support; and an ascending and descending plate which is connected with a lower end of the leg in the interior of the casing and includes a horizontal angle adjusting hole having a plurality of fixing holes and groove moving part and two ascending and descending guides formed at both sides, wherein the apex is exposed to the outside through the smooth concave elongated support by passing the adjusting pin through the horizontal angle adjusting hole, and the ascending and descending spring is connected with each distortion support connected with the ascending and descending plate, so that the casing is attached to an upper surface of the intermediate plate using a bolt, and the horizontal angle adjusting hole becomes free from a control of the adjusting pin by descending the ascending and descending plate by pressing the button, whereby the horizontal angle of the hand back support plate is adjusted.