Abstract:
A surgical treatment instrument includes an insertion portion including a longitudinal axis, an operation portion provided on one end side of the insertion portion, and a treatment portion provided on the other end side of the insertion portion and configured to treat a living tissue. The treatment portion includes a piezoelectric element configured to generate ultrasound and an ultrasound transmitting material configured to transmit the ultrasound generated by the piezoelectric element to the living tissue.
Abstract:
An ultrasound vibration device is provided with a stacked transducer in which a plurality of piezoelectric single crystal element layers are stacked between two metal blocks. Since each of the two metal blocks and the plurality of piezoelectric single crystal element layers is fusion-bonded relative to a stack direction by bonding metal having a melting point corresponding to half a Curie point of the plurality of piezoelectric single crystal element layers or below, it is possible to use non-lead material, reduce a processing cost and realize inexpensiveness.
Abstract:
An ultrasonic transducer includes: two metal blocks; a plurality of piezoelectric elements having rectangular surfaces and stacked between the metal blocks; and bonding materials bonding the metal block and the piezoelectric element and the piezoelectric elements to each other. Thermal expansion coefficients in the diagonal directions from the center of the surface of the piezoelectric element to the four corners thereof are equal to each other.
Abstract:
A stacked ultrasound vibration device is provided with a plurality of piezoelectric bodies between two mass materials, in which brazing materials with an elastic constant smaller than elastic constants of the two mass materials and the plurality of piezoelectric bodies are used to bond the plurality of piezoelectric bodies as similar material bonding portions by a first metal bonding layer with a first thickness and to bond the plurality of piezoelectric bodies and the mass materials as dissimilar material bonding portions by a second metal bonding layer with a second thickness thicker than the first thickness.
Abstract:
An endoscope apparatus includes: a transparent member provided at a distal end of an insertion portion of an endoscope, opposed to an image pickup optical system; a transducer provided on one face of the transparent member; and an elastic member that is provided at a location to which ultrasound vibrations from the transducer are transmitted, and for which a physical property value changes accompanying a temperature change. Thus, the endoscope apparatus suppresses excessive heat generation of a transducer for removing dirt that adheres to an observation window, and prevents damage to the transducer as well as a deterioration in the characteristics thereof.
Abstract:
A stacked ultrasound vibration device includes a stacked piezoelectric body unit in which a plurality of piezoelectric bodies and a plurality of electrode layers are stacked and integrated, a first bonding material that bonds the plurality of piezoelectric bodies and melts at a first bonding temperature lower than a half of a Curie temperature of the plurality of piezoelectric bodies, and a second bonding material that bonds the stacked piezoelectric body unit and the two mass materials and melts at a second bonding temperature lower than the first bonding temperature and higher than a maximum temperature during driving.
Abstract:
An ultrasound vibration device includes a stacked transducer in which a plurality of piezoelectric substances and a plurality of electrode plates are stacked, an external shape of the stacked transducer being in a polygonal prism shape, insulators, a case main body housing the piezoelectric transducer and the insulators, a pressurizing member screwed and fastened to an opening portion of the case main body to pressurize and fix the stacked transducer and the insulators in the case main body, and a plurality of positioning member insertion sections into which a positioning member is inserted, the positioning member retaining the stacked transducer and the insulators in the polygonal prism shape and positioning the stacked transducer in a position where the stacked transducer is non-contact with an inner wall of the case main body and one ends of the insulators are in contact with the pressurizing member.
Abstract:
A multilayer ultrasound vibration device includes a plurality of piezoelectric bodies and a plurality of electrode layers stacked together, wherein: the plurality of piezoelectric bodies are formed of a plurality of monocrystalline piezoelectric bodies; and widths d2 and d3 of outer surfaces of the plurality of electrode layers in a stacking direction is made larger than a spacing distance d1 of the stacked plurality of monocrystalline piezoelectric bodies in the stacking direction.
Abstract:
There is provided an ultrasound transducer device including a plurality of piezoelectric single-crystal plates that are stacked such that polarization components thereof are alternately inverted. The plurality of piezoelectric single-crystal plates are stacked such that directions thereof in which strain deformation in a direction orthogonal to a direction of voltage application from electrodes respectively interposed between the plurality of piezoelectric single-crystal plates becomes largest coincide with each other. There is also provided an ultrasound medical apparatus including the ultrasound transducer device.
Abstract:
An ultrasound medical device includes: a treatment portion configured to treat a living tissue; and a piezoelectric transducer unit provided in the treatment portion and formed by laminating a plurality of piezoelectric elements, which is configured to excite ultrasound vibration, and a plurality of insulating layers and bonding each of the piezoelectric elements and the insulating layers through bonding layers. A thickness of each of the piezoelectric elements, the insulating layers, and a plurality of the bonding layers is set such that nodes of the ultrasound vibration are located other than in the bonding layers.