Dental handpiece
AssigneeKazuyoshi Suzuki
InventorKazuyoshi Suzuki
Life of this patent
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Abstract
A wall portion of a dental handpiece accommodates a cam pin 111 with a cam hole 21 or a cam groove 211 designed so that the size of the cam hole 21 or the cam groove 211 is larger than the size of the cam pin 111 in each of the axial direction and the circumferential direction of a vibration cylinder 20. Therefore, a rotating member 110 is rotationally driven, and a vibrating force acts on the vibration cylinder 20 in the axial direction through the cam pin 111. In this manner, the vibration cylinder 20 vibrates or reciprocates in the axial direction with respect to a second cylindrical member 12, and vibrates or reciprocates in the circumferential direction. In addition, a needle portion 42 protruding from a through-hole 202 of the vibration cylinder 20 vibrates while being bent.
Claims6
A dental handpiece comprising:
- a first cylindrical member;
- a second cylindrical member in which a communication hole continuous with an internal space of the first cylindrical member is formed on a side wall, and connected to one end portion of the first cylindrical member on the side wall;
- a vibration cylinder supporting a needle substrate in a state where a needle portion of a dental piece having the needle substrate and the needle portion extending from the needle substrate is protruded to an external space, and inserted into the second cylindrical member in a coaxial posture;
- a rotating member disposed in the internal space of the first cylindrical member so that one end portion is directed to an internal space of the second cylindrical member via the communication hole;
- and
- an actuator that drives the rotating member to rotate around a central axis,
- wherein a cam protruding portion protruding at a position eccentric with respect to the central axis of the rotating member is provided in the one end portion of the rotating member,
- a cam recessed portion into which the cam protruding portion is fitted is formed on an outside of a side wall of the vibration cylinder,
- the cam recessed portion is formed so that the cam protruding portion of the rotating member is relatively displaceable in a circumferential direction of the vibration cylinder, and
- wherein in the one end portion of the rotating member, a plurality of mounting holes for mounting the cam protruding portion are formed at locations where eccentricity with reference to the central axis of the rotating member is different.
Dependencies are inferred from the claim text.