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A percussion detecting apparatus capable of enhancing an effect of disturbance interception by intercepting a micro-vibration conveyed from a support frame. A pad member has a pad having a back-side surface to which a base is fixed, and a percussion sensor is disposed on a back-side surface of the b

A percussion detecting apparatus capable of enhancing an effect of disturbance interception by intercepting a micro-vibration conveyed from a support frame. A pad member has a pad having a back-side surface to which a base is fixed, and a percussion sensor is disposed on a back-side surface of the base. The pad member is supported by a frame via fixing members integral with the pad member and intervening members made of silicon rubber. Vertical protrusions having different protrusion heights are formed on an upper surface of a flange of each intervening member, and horizontal protrusions are formed on an inner peripheral surface of a through-hole of each intervening member. When the pad member in an unstruck state, each fixing member is in contact with a corresponding one of the intervening members only at the vertical and horizontal protrusions of the intervening member.

대표청구항 ▼

1. A percussion detecting apparatus, comprising: a percussion sensor configured to detect a vibration of a pad member being struck, the pad member having a percussion surface adapted to be struck; andan intervening member disposed between the pad member and a support frame, the intervening member ha

1. A percussion detecting apparatus, comprising: a percussion sensor configured to detect a vibration of a pad member being struck, the pad member having a percussion surface adapted to be struck; andan intervening member disposed between the pad member and a support frame, the intervening member having a base surface on which a first protrusion having elasticity is protrudingly formed,wherein at least one of the pad member and the support frame is in contact with said intervening member at the first protrusion of said intervening member when the pad member is in an unstruck state,wherein said intervening member has, as the base surface, a plurality of base surface portions that face different directions and extend along a direction having a component perpendicular to the percussion surface,a plurality of protrusions, including the first protrusion, are formed on respective ones of the plurality of base surface portions so as to protrude in different directions, anda position of the pad member in the unstruck state in a direction parallel to the percussion surface is restricted by the plurality of protrusions. 2. The percussion detecting apparatus according to claim 1, wherein said intervening member has, as the base surface, a base surface portion extending in a direction having a component parallel to the percussion surface, the first protrusion is protrudingly formed on the base surface portion, anda position of the pad member in the unstruck state in a direction vertically of the percussion surface is restricted by the first protrusion. 3. The percussion detecting apparatus according to claim 2, wherein the first protrusion protrudingly formed on the base surface portion is collapsed by the at least one of the pad member and the support frame and the at least one of the pad member and the support frame can be in contact also with the base surface portion when the percussion surface is struck. 4. The percussion detecting apparatus according to claim 1, wherein said intervening member has, as the base surface, a plurality of slant face portions that face different directions and each extend along a direction having a component oblique to the percussion surface of the pad member, a plurality of protrusions, including the first protrusion, are respectively formed on the slant face portions so as to protrude in different directions, andpositions of the pad member in the unstruck state in directions perpendicular to and parallel to the percussion surface are restricted by the plurality of protrusions. 5. The percussion detecting apparatus according to claim 1, wherein a plurality of protrusions, including the first protrusion, having different protrusion heights are formed on the base surface of said intervening member, and the at least one of the pad member and the support frame is in contact with at least one protrusion having a largest protrusion height among the plurality of protrusions when the pad member in the unstruck state, and can be in contact with other of the plurality of protrusions when the pad member is applied with a displacement force. 6. The percussion detecting apparatus according to claim 1, wherein the first protrusion has an area of cross-section perpendicular to a direction in which the first protrusion is protrudingly formed that becomes smaller toward a tip end of the first protrusion. 7. The percussion detecting apparatus according to claim 1, wherein a plurality of protrusions, including the first protrusion, are formed integrally with said intervening member, a protrusion among the plurality of protrusions extending in a direction having a component parallel to the percussion surface and a protrusion among the plurality of protrusions extending in a direction having a component perpendicular to the percussion surface. 8. The percussion detecting apparatus according to claim 1, wherein said support frame has an annular rib formed with a plate portion projecting inwardly from an inner surface of the annular rib, a fixing member is fixed to the pad member, the fixing member having a flange and a cylindrical portion that extends from the flange and is inserted through the annular rib,said intervening member is disposed between said fixing member and said annular rib,said intervening member is formed with a plurality of protrusions; including the first protrusion, a protrusion among the plurality of protrusions is in contact with or for contact with the flange of the fixing member or with the plate portion of the annular rib, and a protrusion among the plurality of protrusions is in contact with or for contact with the inner surface of the annular rib or with an outer surface of the fixing member.