发明名称 Racket frame
摘要 In a racket frame 2, stoppers 28 are each located on a tip side of a narrow diameter portion 26 protruding from a side of an inner circumferential surface 4b of a head 4. A steel sheets 16 is fixed on the side of the inner circumferential surface 4b opposing the stoppers 28 via the narrow diameter portion 26. Weights 14 each include a magnet sheet 32. The narrow diameter portion 26 is inserted through notches 36 and 38 of the weights 14. The steel sheets 16 and the magnet sheet 32 are bound with magnetic force. The notches 36 and 38 of the weights 14 are locked to a string protecting member 12. The stoppers 28 prevent the weights 14 from being detached form the head 4. The weights 14 are detachably mounted on the head 4.
申请公布号 US9533198(B2) 申请公布日期 2017.01.03
申请号 US201414181259 申请日期 2014.02.14
申请人 DUNLOP SPORTS CO. LTD. 发明人 Yamamoto Yosuke
分类号 A63B49/04 主分类号 A63B49/04
代理机构 Birch, Stewart, Kolasch & Birch, LLP 代理人 Birch, Stewart, Kolasch & Birch, LLP
主权项 1. A racket frame comprising: a head; a string protecting member; a weight; and a frame magnetic body, wherein the string protecting member includes a grommet through which a string is inserted, a narrow diameter portion located on a tip side of the grommet, and a stopper located at a tip of the narrow diameter portion, the grommet penetrates through an outer circumferential surface and an inner circumferential surface of the head, the stopper is located on a side of the tip of the narrow diameter portion protruding from a side of the inner circumferential surface of the head, the frame magnetic body is fixed on the side of the head's inner circumferential surface opposing the stopper via the narrow diameter portion, the weight includes a weight magnetic body, the weight magnetic body and the frame magnetic body tug each other with magnetic force, the weight has a notch, the notch has inserted therethrough the narrow diameter portion, the notch of the weight is locked to the narrow diameter portion, the grommet penetrates through the notch of the weight, the notch has an opening configured to extend from one surface of the weight to another surface of the weight along an axial direction of the grommet, the stopper prevents detachment of the weight in a direction from the outer circumferential surface to the inner circumferential surface of the head, the weight is configured to be detachably mounted on the head after the racket is strung, the weight is pinched between the stopper and the frame magnetic body, and the weight and the frame magnetic body are attached firmly to each other with magnetic force to prevent gaps from occurring between the weight and the frame magnetic body.
地址 Kobe-Shi JP