JPH02118581U

JPH02118581U -

Info

Publication number: JPH02118581U
Application number: JP2781689U
Authority: JP
Priority date: 1989-03-11
Filing date: 1989-03-11
Publication date: 1990-09-25

Description

[Brief explanation of the drawing]

図面はこの考案の一実施例を示すもので、第１
図はボーリング用投球練習具の長手方向に沿つた
断面図、第２図はその展開外面図、第３図は展開
内面図である。２……バンド、３……規制板、４……連結手段
、４ｂ……コイルばね、４ｃ……規制部材、４ｅ
……隙間。 The drawing shows one embodiment of this invention.
The figure is a sectional view along the longitudinal direction of the bowling pitching practice tool, FIG. 2 is an expanded external view thereof, and FIG. 3 is an expanded internal view thereof. 2... Band, 3... Regulation plate, 4... Connecting means, 4b... Coil spring, 4c... Regulation member, 4e
……gap.

Claims

[Scope of utility model registration request]

A band 2 worn on the lower arm of the athlete is provided with a bone plate 3a extending toward the wrist, and a regulating plate 3 for regulating finger curvature is rotatably supported on the bone plate 3a facing the back of the hand. A pivot shaft 4a is provided on one of the bone plate 3a and the regulation plate 3, and a through-hole 3e provided in the other is penetrated, and a free end of the pivot shaft 4a is provided with a pivot shaft 4a extending toward the regulation plate 3 side. A substantially cup-shaped regulating member 4c is inserted so that it cannot move backward, and a slight clearance 4e is provided between the regulating member 4c and the regulating plate 3.
This bowling pitching practice tool has a coil spring compressed between the inner surface of the regulating member 4c and the regulating plate 3.