公开(公告)号：US20160275925A1

公开(公告)日：2016-09-22

申请号：US15051934

申请日：2016-02-24

Applicant: YAMAHA CORPORATION

Inventor： Yohei WADA ,  Ryuji HASHIMOTO

IPC: G10D13/02

CPC classification number: G10D13/027 ,  G10D13/022

Abstract: A drum head includes a skin having an inner skin and an outer skin formed integrally with an outer edge of the inner skin. The inner skin has a plurality of openings arranged in a circumferential direction of the inner skin. An outline of each of the plurality of openings has an inner end portion in a radial direction of the skin in plan view, and the inner end portion protrudes and tapers inward in the radial direction.

Abstract translation: 鼓头包括具有与内皮的外边缘一体形成的内皮和外皮的皮肤。 内皮具有沿着内皮的圆周方向排列的多个开口。 多个开口中的每一个的轮廓在平面图中具有在皮肤的径向方向上的内端部，并且内端部沿径向向内突出并逐渐变细。

公开(公告)号：US20230267903A1

公开(公告)日：2023-08-24

申请号：US18306475

申请日：2023-04-25

Applicant: YAMAHA CORPORATION

Inventor： Soichi TAKIGAWA ,  Yohei WADA ,  Koji YATAKA ,  Yoshinari NAKAMURA ,  Takahiro ASANO

IPC: G10H1/34

CPC classification number: G10H1/344 ,  G10H2220/221 ,  G10H2220/275

Abstract: A keyboard apparatus according to an embodiment includes a keyboard and a mutual capacitance proximity sensor. The keyboard includes a first key and a second key arranged in an array direction with respect to the first key. The proximity sensor includes a first electrode having a portion extending from at least a first area below the first key to a second area below the second key, a second electrode arranged in the first area, and a third electrode arranged in the second area. The proximity sensor is a mutual capacitance type sensor and is configured to use a change in capacitance between the first electrode and the second electrode and a change in capacitance between the first electrode and the third electrode.

公开(公告)号：US20230152169A1

公开(公告)日：2023-05-18

申请号：US18156589

申请日：2023-01-19

Applicant: YAMAHA CORPORATION

Inventor： Yohei WADA ,  Yasuro OKUMIYA ,  Koji YATAKA ,  Katsunori SUZUKI

IPC: G01L1/22 ,  G01B7/16

CPC classification number: G01L1/2231 ,  G01L1/2287 ,  G01B7/18

Abstract: A biometric sensor 1 according to one aspect of the present disclosure includes: a fixed member 20 having a frame 21 which is ring-shaped; and a first strain sensor element 31 and a second strain sensor element 32, each of the first strain sensor element and the second strain sensor element being string-shaped or strip-shaped, and the first strain sensor element and the second strain sensor element being stretchable and recoverable in a lengthwise direction of the first strain sensor element and a lengthwise direction of the second strain sensor element, wherein the first strain sensor element 31 and the second strain sensor element 32 extend across the frame 21 and are disposed such that the first strain sensor element 31 and the second strain sensor element 32 cross each other, and wherein the frame 21 is configured to be deformable at least in the lengthwise direction of the first strain sensor element 31 and the lengthwise direction of the second strain sensor element 32.

公开(公告)号：US20220003619A1

公开(公告)日：2022-01-06

申请号：US17480901

申请日：2021-09-21

Applicant: Yamaha Corporation

Inventor： Yasuro OKUMIYA ,  Yohei WADA

IPC: G01L5/10 ,  G01L1/22

Abstract: A strain sensor unit includes a filamentous or strip-shaped strain sensor element configured to stretch in a longitudinal direction, and an extension regulator coupled to the strain sensor element and configured to set an initial value of an amount of extension of the strain sensor element.