WO2018185821A1 - Unité piézoélectrique et outil de traitement - Google Patents

Unité piézoélectrique et outil de traitement Download PDF

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Publication number
WO2018185821A1
WO2018185821A1 PCT/JP2017/013989 JP2017013989W WO2018185821A1 WO 2018185821 A1 WO2018185821 A1 WO 2018185821A1 JP 2017013989 W JP2017013989 W JP 2017013989W WO 2018185821 A1 WO2018185821 A1 WO 2018185821A1
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WIPO (PCT)
Prior art keywords
piezoelectric
electrode
main surface
overhang
plate member
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Application number
PCT/JP2017/013989
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English (en)
Japanese (ja)
Inventor
塩谷　浩一
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オリンパス株式会社
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Priority to PCT/JP2017/013989 priority Critical patent/WO2018185821A1/fr
Publication of WO2018185821A1 publication Critical patent/WO2018185821A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction

Definitions

  • the present invention relates to a piezoelectric unit and a treatment instrument.
  • the piezoelectric unit includes the following piezoelectric members (rectangular piezoelectric bodies), first and second electrodes (positive power side electrode plates, negative power side electrode plates), first and second plate members (insulating plates), and First and second wirings (electric cables) are provided.
  • the piezoelectric member is a piezoelectric body made of a flat plate having a rectangular shape in plan view extending in the longitudinal direction from the distal end to the proximal end of the ultrasonic probe.
  • the first and second electrodes are each formed of a flat plate having the same planar shape as the piezoelectric member, and are joined so as to sandwich the front and back surfaces of the piezoelectric member.
  • the first and second plate members are flat plates made of an insulating material and having the same planar shape as the piezoelectric member. The first and second plate members are respectively joined to the front and back surfaces of the piezoelectric member with the first and second electrodes interposed therebetween.
  • the piezoelectric member, the first and second electrodes, and the first and second plate members are laminated so that the four corners and the four sides of the rectangular shape in plan view are coincident with each other. It is unitized in a rectangular parallelepiped shape.
  • a block in which the piezoelectric member, the first and second electrodes, and the first and second plate members are unitized will be referred to as a piezoelectric block.
  • the first and second wirings are conductively connected to the first and second electrodes from both sides in the width direction of the piezoelectric block.
  • the piezoelectric member vibrates in the thickness direction (direction in which the jaw and the ultrasonic probe face each other) by applying a voltage to the first and second electrodes via the first and second wirings. Generate ultrasonic vibrations in the direction.
  • the first and second wires are conductively connected to the first and second electrodes from both sides in the width direction of the piezoelectric block. For this reason, it is necessary to provide wiring spaces for the first and second wirings on both sides in the width direction of the piezoelectric block, and there is a problem that it is difficult to reduce the diameter of the ultrasonic probe in the width direction.
  • the present invention has been made in view of the above, and an object thereof is to provide a piezoelectric unit and a treatment instrument that can be miniaturized without reducing the generated ultrasonic energy.
  • a piezoelectric unit has a first main surface and a second main surface that is opposite to the first main surface.
  • a piezoelectric member that generates ultrasonic vibration in accordance with a potential difference generated between the first main surface and the second main surface, a first electrode formed on the first main surface, and the first electrode
  • At least one of the piezoelectric member and the first plate member protrudes in a first direction along the first main surface from at least one end of the piezoelectric member and the first plate member.
  • the wiring is conductively connected to the first electrode in the stacking direction of the first plate member, the first electrode, the piezoelectric member, and the second electrode, and the second wiring is Conductive connection is made in
  • the treatment tool according to the present invention includes the piezoelectric unit described above.
  • the size can be reduced without reducing the generated ultrasonic energy.
  • FIG. 1 is a diagram schematically illustrating a treatment tool according to the first embodiment.
  • FIG. 2 is an enlarged view of the distal end portion of the treatment instrument.
  • 3 is a cross-sectional view taken along the line III-III shown in FIG.
  • FIG. 4 is a diagram illustrating the piezoelectric unit.
  • FIG. 5 is a diagram illustrating the piezoelectric unit.
  • FIG. 6 is a diagram showing a piezoelectric unit according to a modification of the first embodiment.
  • FIG. 7 is a diagram illustrating a piezoelectric unit according to a modification of the first embodiment.
  • FIG. 8 is a diagram for explaining the effect of the modification of the first embodiment.
  • FIG. 9 is a diagram illustrating the piezoelectric unit according to the second embodiment.
  • FIG. 10 is a diagram illustrating the piezoelectric unit according to the second embodiment.
  • FIG. 11 is a diagram for explaining the effect of the second embodiment.
  • FIG. 12 is a diagram illustrating a piezoelectric unit according to a modification of the second embodiment.
  • FIG. 13 is a diagram illustrating a piezoelectric unit according to a modification of the second embodiment.
  • FIG. 14 is a diagram for explaining the effect of the modification of the second embodiment.
  • FIG. 15 is a diagram illustrating the piezoelectric unit according to the third embodiment.
  • FIG. 16 is a diagram illustrating the piezoelectric unit according to the third embodiment.
  • FIG. 17 is a diagram for explaining the effect of the third embodiment.
  • FIG. 1 is a diagram schematically illustrating a treatment instrument 1 according to the first embodiment.
  • the treatment tool 1 is, for example, a surgical treatment tool for performing treatment (joining (or anastomosis), separation, etc.) on living tissue through the abdominal wall.
  • the treatment instrument 1 includes a handle 2, a shaft 3, and a grip portion 4.
  • the handle 2 is a part that the surgeon holds by hand.
  • the handle 2 is provided with a bending operation lever 21, an operation handle 22, and a fixed handle 23.
  • the shaft 3 has a substantially cylindrical shape, and one end (right end portion in FIG. 1) is connected to the handle 2 via a rotation operation member 5.
  • a grip 4 is attached to the other end of the shaft 3 (left end in FIG. 1).
  • the shaft 3 has a configuration in which a bending portion 31 and an insertion tube portion 32 are connected in order from the left side in FIG.
  • the rotation operation member 5 supports the shaft 3 and is attached to the handle 2 so as to be rotatable about the central axis of the shaft 3. That is, when the rotation operation member 5 is rotated according to the operation of the surgeon, the shaft 3 and the grip portion 4 attached to the shaft 3 have the center axis of the shaft 3 together with the rotation operation member 5. Rotates as the center.
  • An opening / closing mechanism (not shown) that opens and closes the jaw 6 (FIG. 1) and the ultrasonic probe 7 (FIG. 1) constituting the grasping portion 4 according to the operation of the operation handle 22 by the operator is provided inside the shaft 3. ) Is provided. Further, inside the shaft 3, the bending portion 31 is bent with respect to the insertion tube portion 32 in accordance with the operation of the bending operation lever 21 by the operator (for example, in two directions, upward or downward in FIG. 1). A bending mechanism (not shown) is provided. Further, an electric cable C (FIG. 1) is disposed inside the shaft 3 from the one end side (right end side in FIG. 1) to the other end side (left end side in FIG. 1) via the handle 2. ing.
  • FIG. 2 is an enlarged view of the distal end portion of the treatment instrument 1.
  • 3 is a cross-sectional view taken along the line III-III shown in FIG.
  • the first to fourth metal films 13, 14, 112, 122 (see FIG. 5) and the brazing materials S1, S2 (see FIG. 5) are not shown for convenience of explanation.
  • the “tip side” described below is the tip side of the grip portion 4 and means the left side in FIGS. 1 and 2.
  • the “base end side” described below is the shaft 3 side of the grip portion 4 and means the right side in FIGS. 1 and 2.
  • the grasping part 4 is a part that treats the living tissue by grasping the living tissue to be treated and applying ultrasonic energy (ultrasonic vibration) to the living tissue.
  • the grip portion 4 includes a jaw 6 and an ultrasonic probe 7.
  • the jaw 6 is disposed on the upper side in FIGS. 1 and 2 with respect to the ultrasonic probe 7.
  • the jaw 6 is a long member extending in the longitudinal direction of the grip portion 4 (the direction from the distal end of the grip portion 4 to the base end (left and right direction in FIGS. 1 and 2)).
  • the other end (left end in FIGS. 1 and 2) is pivotally supported so as to be rotatable in the direction of arrow R1 (FIG. 2).
  • the jaw 6 rotates in the direction of the arrow R1 according to the operation of the operation handle 22 by the operator.
  • the jaw 6 is provided with a sawtooth pressing portion 61 made of an insulating material on the lower surface in FIGS. 1 and 2.
  • the ultrasonic probe 7 is a portion that generates ultrasonic vibrations, is formed in a long shape extending in the longitudinal direction of the grip portion 4, and is connected to the other end of the shaft 3 (the left end portion in FIGS. 1 and 2). Fixed.
  • the ultrasonic probe 7 grips the living tissue with the jaw 6 according to the rotation of the jaw 6 in the direction of the arrow R1, and applies ultrasonic vibration to the living tissue.
  • the ultrasonic probe 7 includes a cover member 8 and a piezoelectric unit 9 (FIGS. 2 and 3).
  • the cover member 8 is made of duralumin or a titanium alloy such as 64 Ti, has a substantially cylindrical shape extending in the longitudinal direction of the grip portion 4, and a proximal end side is fixed to the other end of the shaft 3.
  • a hollow portion 81 (FIG. 3) extending along the longitudinal direction of the cover member 8 is formed inside the cover member 8.
  • an opening 82 (FIG. 3) that communicates the hollow portion 81 and the outside is formed on the distal end side of the upper surface in FIGS. 1 to 3.
  • the base end side communicates the hollow portion 81 with the outside, and an opening for inserting the electric cable C disposed up to the other end side of the shaft 3 into the hollow portion 81. (Not shown) is formed.
  • the piezoelectric unit 9 is a part that generates ultrasonic vibrations according to the electric power supplied via the electric cable C, and is accommodated in the hollow part 81 with a part exposed to the outside via the opening 82. The Hereinafter, a detailed configuration of the piezoelectric unit 9 will be described.
  • FIGS. 4 and 5 are diagrams showing the piezoelectric unit 9.
  • FIG. 4 is a perspective view of the piezoelectric unit 9 viewed from the base end side.
  • FIG. 5 is a cross-sectional view of the piezoelectric unit 9 cut along a cut surface along the longitudinal direction of the grip portion 4. 4 and 5, the upper side is the side close to the jaw 6.
  • the first to fourth metal films 13, 14, 112, 122 (FIG. 5) and the brazing materials S1, S2 (FIG. 5) are omitted for convenience of explanation.
  • the piezoelectric unit 9 includes a piezoelectric member 10, a first plate member 11, a second plate member 12, a first wiring C1 (FIGS. 4 and 5), A second wiring C2 (FIGS. 4 and 5) is provided.
  • the piezoelectric member 10 is a piezoelectric body composed of a flat plate having a rectangular shape in plan view extending in the longitudinal direction of the grip portion 4. 3 to 5 of the piezoelectric member 10, the upper plate surface corresponds to the first main surface 101 according to the present invention.
  • a first metal film 13 (FIG. 5) is formed on the entire surface of the first main surface 101.
  • the first metal film 13 corresponds to the first electrode according to the present invention.
  • the lower plate surface of the piezoelectric member 10 corresponds to the second main surface 102 according to the present invention.
  • a second metal film 14 (FIG. 5) is formed on the entire surface of second main surface 102.
  • the second metal film 14 corresponds to the second electrode according to the present invention.
  • the piezoelectric member 10 described above has the piezoelectric member 10 according to the potential difference generated between the first and second metal films 13 and 14 (potential difference generated between the first and second main surfaces 101 and 102). Ultrasonic vibration is generated with the vibration direction as the thickness direction R2 (FIGS. 3 to 5).
  • the thickness direction R2 is a direction in which the jaw 6 and the ultrasonic probe 7 face each other, and corresponds to the stacking direction according to the present invention.
  • a heat generation temperature for example, a maximum of 200 ° C. or more
  • the piezoelectric member 10 and the first and second plate members 11, 12 are brazed.
  • the piezoelectric characteristics are not deteriorated even by the soldering temperature (for example, 200 ° C. or higher for solder bonding and 300 ° C. or higher for AuSn bonding).
  • the soldering temperature for example, 200 ° C. or higher for solder bonding and 300 ° C. or higher for AuSn bonding.
  • PZT lead zirconate titanate
  • the piezoelectric characteristics deteriorate.
  • a piezoelectric material having durability at the above-described temperature there is a piezoelectric single crystal lithium niobate single crystal (LiNbO3).
  • the electromechanical coupling coefficient in the thickness direction R2 has the same value as lead zirconate titanate (PZT), and the efficiency
  • PZT lead zirconate titanate
  • the value of the electromechanical coupling coefficient varies depending on the crystal orientation, and becomes a maximum at a certain angle.
  • the piezoelectric member 10 uses a 36-degree rotated Y-cut lithium niobate single crystal (LiNbO3).
  • a specific crystal orientation for example, a 36-degree rotation Y-cut is given in consideration of availability in the market, but not limited thereto, the vicinity thereof within a range where the electromechanical coupling coefficient does not greatly decrease.
  • the first plate member 11 is configured by a flat plate having a rectangular shape in plan view extending in the longitudinal direction of the grip portion 4. 3 to 5 of the first plate member 11, the lower plate surface corresponds to the first facing surface 111 according to the present invention.
  • a third metal film 112 (FIG. 5) is formed on the entire surface of the first facing surface 111.
  • the width dimension of the first plate member 11 is set to be the same as the width dimension of the piezoelectric member 10 as shown in FIG. 3 or FIG.
  • the length dimension of the longitudinal direction of the 1st board member 11 is set so that it may become smaller than the length dimension of the longitudinal direction of the piezoelectric member 10, as shown in FIG. 4 or FIG. As shown in FIG.
  • the first plate member 11 has a longitudinal position that coincides with the piezoelectric member 10 in the longitudinal direction, and the base end side of the piezoelectric member 10 is the first plate member 11.
  • the first main surface 101 is brazed (joined) via the brazing material S1.
  • the first plate member 11 described above is shown in FIG. 3 when the upper plate surface is exposed to the outside through the opening 82 and the living tissue is grasped by the jaw 6 and the ultrasonic probe 7. Contact living tissue. That is, the first plate member 11 imparts ultrasonic vibration generated in the piezoelectric member 10 to the living tissue.
  • the second plate member 12 has the same shape as the first plate member 11. 3 to 5 of the second plate member 12, the upper plate surface corresponds to the second facing surface 121 according to the present invention.
  • a fourth metal film 122 (FIG. 5) is formed on the entire surface of the second facing surface 121.
  • the second plate member 12 has the brazing material S ⁇ b> 2 so that the four corners and the four sides of the first plate member 11 having a rectangular shape in plan view coincide with each other. And is soldered (joined) to the second main surface 102.
  • the brazing materials S1 and S2 include AuSn and solder.
  • insulating materials such as zirconia and alumina with high mechanical strength, can be illustrated.
  • Ti / Pt / Au, Ti / Ni / Au, etc. for improving the adhesion of the brazing materials S1, S2 such as AuSn and solder. can be illustrated.
  • the portions facing the first and second plate members 11 and 12 correspond to the piezoelectric main body 103 (FIGS. 4 and 5) according to the present invention.
  • a portion protruding in the first direction R3 from the base ends of the first and second plate members 11 and 12 is a piezoelectric protruding portion 104 (FIGS. 4 and 5) according to the present invention. It corresponds to. That is, the first and second main surfaces 101 and 102 are the front and back surfaces of the piezoelectric main body portion 103 and the piezoelectric extension portion 104.
  • the first and second metal films 13 and 14 are respectively formed on the first and second main surfaces 101 and 102 across the piezoelectric main body 103 and the piezoelectric overhang 104.
  • the first wiring C1 constitutes the electric cable C, and a conductive adhesive from the upper side in FIGS. 4 and 5 with respect to the portion of the first metal film 13 formed on the piezoelectric overhanging portion 104.
  • the conductive connection is made by solder or the like. That is, the first wiring C1 is conductively connected to the first metal film 13 in the thickness direction R2.
  • the second wiring C2 constitutes the electric cable C, and a conductive adhesive from the lower side in FIGS. 4 and 5 to the portion of the second metal film 14 formed on the piezoelectric overhanging portion 104.
  • the conductive connection is made by solder or the like. That is, the second wiring C2 is conductively connected to the second metal film 14 in the thickness direction R2.
  • the piezoelectric member 10 generates ultrasonic vibrations when a voltage is applied to the first and second metal films 13 and 14 via the first and second wirings C1 and C2.
  • the piezoelectric member 10 includes the piezoelectric main body 103 that faces the first and second plate members 11 and 12, and the first and second plate members 11 and 12. And a piezoelectric overhanging portion 104 projecting in the first direction R3 from the base end.
  • the first and second wirings C1 and C2 are conductively connected in the thickness direction R2 to the portions of the first and second metal films 13 and 14 formed on the piezoelectric extension 104, respectively. .
  • the piezoelectric member 10 has the first and second plate members 11 and 12 joined to both the first and second main surfaces 101 and 102, respectively. Yes. For this reason, when the piezoelectric unit 9 is incorporated in a product, the fragile piezoelectric member 10 can be protected by the first and second plate members 11 and 12.
  • FIG. 6 and 7 are diagrams showing a piezoelectric unit 9A according to a modification of the first embodiment.
  • FIG. 8 is a diagram for explaining the effect of the modification of the first embodiment.
  • FIG. 6 is a perspective view of the piezoelectric unit 9A viewed from the base end side.
  • FIG. 7 is a cross-sectional view corresponding to FIG.
  • FIG. 8A is a cross-sectional view of the ultrasonic probe 7 described in the first embodiment described above, cut along a cut surface along the longitudinal direction.
  • FIG. 8B is a cross-sectional view of the ultrasonic probe 7 employing the piezoelectric unit 9A according to the present modification, cut along a cut surface along the longitudinal direction.
  • a piezoelectric unit 9 ⁇ / b> A in which the second plate member 12 is omitted may be employed instead of the piezoelectric unit 9. If such a piezoelectric unit 9A is employed, the dimension of the cover member 8 in the thickness direction R2 on the front end side of the cover member 8 can be determined by comparing the second plate member 12 as shown in FIG. 8 (a) and FIG. 8 (b). Can be reduced by the dimension D1 (FIG.
  • the second wiring C2 is not limited to the configuration in which the second metal film 14 is conductively connected to the portion formed in the piezoelectric overhanging portion 104 of the second metal film 14, but is formed in the piezoelectric main body 103. You may employ
  • FIG. 9 is a perspective view of the piezoelectric unit 9B viewed from the base end side.
  • FIG. 10 is a cross-sectional view corresponding to FIG. 9 and 10, the lower side is the side close to the jaw 6. That is, in FIG. 9 and FIG. 10, for convenience of explanation, the piezoelectric unit 9 ⁇ / b> B is illustrated in an upside down posture with respect to FIG. 4 and FIG. 5.
  • FIG. 9 is a perspective view of the piezoelectric unit 9B viewed from the base end side.
  • FIG. 10 is a cross-sectional view corresponding to FIG. 9 and 10, the lower side is the side close to the jaw 6. That is, in FIG. 9 and FIG. 10, for convenience of explanation, the piezoelectric unit 9 ⁇ / b> B is illustrated in an upside down posture with respect to FIG. 4 and FIG. 5.
  • FIG. 9 is a perspective view of the piezoelectric unit 9B viewed from the base end side.
  • FIG. 10 is a cross-sectional view corresponding to FIG
  • the second embodiment is different from the first embodiment described above in that a piezoelectric unit 9B different from the piezoelectric unit 9 is employed as shown in FIG. 9 or FIG.
  • the longitudinal dimension of the piezoelectric unit 9 described in the first embodiment is different from that of the first plate member 11 in the first length.
  • a plate member 11B is employed.
  • the length dimension in the longitudinal direction of the first plate member 11B is set to be larger than the length dimension in the longitudinal direction of the piezoelectric member 10, as shown in FIG. 9 or FIG.
  • the first plate member 11 ⁇ / b> B has a longitudinal position that coincides with the piezoelectric member 10, and the base end side of the first plate member 11 ⁇ / b> B is first than the base end of the piezoelectric member 10.
  • the first main surface 101 is brazed (joined) via the brazing material S1.
  • the portion facing the piezoelectric member 10 corresponds to the first main body 113 (FIGS. 9 and 10) according to the present invention.
  • the portion protruding in the first direction R3 from the base end of the piezoelectric member 10 corresponds to the first protruding portion 114 (FIGS. 9 and 10) according to the present invention.
  • the first facing surface 111 is a surface on the piezoelectric member 10 side in the first main body portion 113 and the first projecting portion 114.
  • the first wiring C1 according to the second embodiment is conductive from the upper side in FIGS. 9 and 10 with respect to the portion of the third metal film 112 formed in the first overhanging portion 114.
  • the first metal film 13, the brazing material S1, and the third metal film 112 correspond to the first electrode 13B (FIG. 10) according to the present invention. That is, the first electrode 13 ⁇ / b> B is formed on the first main surface 101 and the first facing surface 111 across the piezoelectric member 10 and the first overhanging portion 114.
  • FIG. 11 is a diagram for explaining the effect of the second embodiment. Specifically, FIG. 11 (a) is the same diagram as FIG. 8 (a).
  • FIG. 11B is a cross-sectional view of the ultrasonic probe 7 employing the piezoelectric unit 9B according to the second embodiment, cut along a cut surface along the longitudinal direction. In FIG. 11, the upper side is the side close to the jaw 6.
  • the first to fourth metal films 13, 14, 112, 122 (FIG. 10) and the brazing materials S1, S2 (FIG. 10) are omitted for convenience of explanation.
  • the first plate member 11B protrudes in the first direction R3 from the first main body 113 facing the piezoelectric member 10 and the base end of the piezoelectric member 10.
  • the first wiring C1 is conductively connected from the lower side in FIG. 11B to the portion of the third metal film 112 formed in the first overhanging portion 114.
  • the second wiring C2 is conductively connected from the lower side in FIG. 11B to the portion of the second metal film 14 formed on the piezoelectric overhanging portion 104. Therefore, the drawing direction of the first and second wirings C1 and C2 can be set to the same direction (downward in FIG.
  • the space can be reduced in the thickness direction R2. That is, if such a piezoelectric unit 9B is employed, the dimension in the thickness direction R2 of the cover member 8 can be set according to the reduction of the wiring space, as can be seen by comparing FIG. 11 (a) and FIG. 11 (b).
  • the dimension D2 (FIG. 11B) can be reduced, and the grip portion 4 can be reduced in the thickness direction R2. Further, since the drawing directions of the first and second wirings C1 and C2 are set in the same direction, the wiring work to the first electrode 13B and the second metal film 14 can be easily performed. Productivity of the piezoelectric unit 9B can be improved.
  • FIGS. 12 and 13 are diagrams showing a piezoelectric unit 9C according to a modification of the second embodiment.
  • FIG. 14 is a diagram for explaining the effect of the modification of the second embodiment.
  • FIG. 12 is a perspective view of the piezoelectric unit 9C viewed from the base end side.
  • FIG. 13 is a cross-sectional view corresponding to FIG.
  • FIG. 14A is the same diagram as FIG.
  • FIG. 14B is a cross-sectional view of the ultrasonic probe 7 employing the piezoelectric unit 9C according to the present modification, cut along a cut surface along the longitudinal direction. 12 to 14, the upper side is the side close to the jaw 6.
  • the first to fourth metal films 13, 14, 112, 122 FIGS. 12 and 14
  • FIGS. 12 and 14 the first to fourth metal films 13, 14, 112, 122
  • a piezoelectric unit 9C in which the second plate member 12 is omitted may be employed instead of the piezoelectric unit 9B. If such a piezoelectric unit 9C is employed, as can be seen by comparing FIG. 14A and FIG. 14B, the front end side of the cover member 8 is the same as the modification of the first embodiment described above.
  • the dimension in the thickness direction R2 can be reduced by the dimension D1 (FIG. 14B) corresponding to the omission of the second plate member 12, and the grip portion 4 can be reduced in the thickness direction R2. .
  • FIG. 15 and 16 are diagrams showing a piezoelectric unit 9D according to the third embodiment.
  • FIG. 15 is a perspective view of the piezoelectric unit 9D viewed from the base end side.
  • FIG. 16 is a cross-sectional view corresponding to FIG. 15 and 16, the upper side is the side close to the jaw 6.
  • the first to fourth metal films 13, 14, 112, 122 (FIG. 16) and the brazing materials S1, S2 (FIG. 16) are omitted for convenience of explanation.
  • the third embodiment is different from the first embodiment described above in that a piezoelectric unit 9D different from the piezoelectric unit 9 is employed.
  • first and second plate members 11D and 12D having different shapes from the first and second plate members 11 and 12 are employed.
  • the first plate member 11D is configured by a flat plate, similar to the first plate member 11 described in the first embodiment.
  • the first plate member 11D includes a first main body portion 113D having the same planar shape as the piezoelectric member 10, and a first end from the base end of the first main body portion 113D. 1st overhang
  • the first facing surface 111 is a surface on the piezoelectric member 10 side in the first main body portion 113D and the first overhang portion 114D.
  • the width dimension of the first projecting portion 114D is set to be smaller than the width dimension of the first main body portion 113D.
  • the first plate member 11 ⁇ / b> D has four corners and four sides of the first main body 113 ⁇ / b> D and the piezoelectric member 10 that are rectangular in plan view, and the first plate member 11 ⁇ / b> D matches the first side.
  • the first wiring C1 according to the third embodiment is conductive from the lower side in FIGS. 15 and 16 with respect to the portion of the third metal film 112 formed on the first overhanging portion 114D. Conductive connection is made with an adhesive or solder.
  • the first metal film 13, the brazing filler metal S1, and the third metal film 112 correspond to the first electrode 13D (FIG. 16) according to the present invention. That is, the first electrode 13D is formed on the first main surface 101 and the first facing surface 111 across the piezoelectric member 10 and the first overhanging portion 114D.
  • the second plate member 12D is configured by a flat plate, similar to the second plate member 12 described in the second embodiment. Then, as shown in FIG. 15 or FIG. 16, the second plate member 12 ⁇ / b> D has a second main body portion 123 having the same planar shape as the piezoelectric member 10, and a second end from the proximal end of the second main body portion 123. And a second overhanging portion 124 projecting in the first direction R3. That is, the second facing surface 121 is a surface on the piezoelectric member 10 side in the second main body portion 123 and the second projecting portion 124.
  • the width dimension of the second overhanging portion 124 is set to be smaller than the width dimension of the second main body portion 123.
  • the second plate member 12 ⁇ / b> D has the four corners and the four sides of the rectangular shape of the second main body 123 and the piezoelectric member 10 that coincide with each other, With the protruding portion 124 protruding in the first direction R3 from the base end of the piezoelectric member 10, it is brazed (joined) to the second main surface 102 via the brazing material S2.
  • the first and second projecting portions 114D and 124 are in a state where the first and second plate members 11D and 12D are joined to the piezoelectric member 10, respectively. They are formed so as not to overlap each other in the thickness direction R2.
  • the second wiring C2 according to the third embodiment is conductive from the upper side in FIGS. 15 and 16 with respect to the portion of the fourth metal film 122 formed in the second overhanging portion 124. Conductive connection is made with an adhesive or solder.
  • the second metal film 14, the brazing filler metal S2, and the fourth metal film 122 correspond to the second electrode 14D (FIG. 16) according to the present invention. That is, the second electrode 14 ⁇ / b> D is formed on the second main surface 102 and the second facing surface 121 across the piezoelectric member 10 and the second overhanging portion 124.
  • FIG. 17 is a diagram for explaining the effect of the third embodiment.
  • FIG. 17A is the same diagram as FIG.
  • FIG. 17B is a cross-sectional view of the ultrasonic probe 7 employing the piezoelectric unit 9D according to the third embodiment, cut along a cut surface along the longitudinal direction.
  • the upper side is the side close to the jaw 6.
  • the first to fourth metal films 13, 14, 112, 122 (FIG. 16) and the brazing materials S1, S2 (FIG. 16) are not shown for convenience of explanation.
  • the first plate member 11D protrudes in the first direction R3 from the first main body 113D facing the piezoelectric member 10 and the base end of the piezoelectric member 10. 1st overhang
  • projection part 114D is provided.
  • the first wiring C1 is conductively connected from the lower side in FIG. 17B to the portion of the third metal film 112 formed in the first overhanging portion 114D.
  • the second plate member 12 ⁇ / b> D includes a second main body 123 that faces the piezoelectric member 10, and a second protruding portion 124 that protrudes in the first direction R ⁇ b> 3 from the base end of the piezoelectric member 10. .
  • the second wiring C2 is conductively connected from the upper side in FIG. 17B to the portion of the fourth metal film 122 formed in the second overhanging portion 124. For this reason, the drawing direction of the first and second wirings C1 and C2 is set to the piezoelectric member 10 side (first wiring C1: in FIG. 17B, downward, second wiring C2 in FIG. 17B). ), And the wiring space for the first and second wirings C1 and C2 can be reduced in the thickness direction R2. That is, if such a piezoelectric unit 9D is employed, the dimension in the thickness direction R2 of the cover member 8 can be set according to the reduction of the wiring space, as can be seen by comparing FIG. 17 (a) and FIG. 17 (b).
  • the grip portion 4 can be reduced in diameter in the thickness direction R2. Further, since the entire surfaces of the first and second main surfaces 101 and 102 of the piezoelectric member 10 are covered with the first and second plate members 11D and 12D, they are easily broken when the piezoelectric unit 9D is incorporated into a product. The piezoelectric member 10 can be sufficiently protected by the first and second plate members 11D and 12D.
  • the first and second projecting portions 114D and 124 are formed so as not to overlap each other in the thickness direction R2. For this reason, for example, compared to a configuration in which all of the first and second overhang portions 114D and 124 are formed so as to overlap each other in the thickness direction, the first and second overhang portions 114D and 124 are moved to.
  • the wiring work of the first and second wirings C1 and C2 can be easily performed, and the productivity of the piezoelectric unit 9D can be improved.
  • the spatial distance between the first and second overhang portions 114D and 124 can be increased, the dielectric strength can also be improved.
  • the first and second electrodes according to the present invention are the first to fourth metal films 13, 14, 112, 122 and the brazing materials S1, S2.
  • You may comprise with the flat plate which has electroconductivity.
  • at least one of the flat plate-like first and second electrodes is set to be more than the base end of at least one of the piezoelectric member 10, the first plate members 11, 11B, 11D, and the second plate members 12, 12D.
  • the first and second wirings C1 and C2 may be extended in the first direction R3 and the extended parts may be provided.
  • the piezoelectric member 10 and the first and second plate members 11 and 12 are joined to each other by brazing. Etc. may be joined.
  • the adhesive in addition to the adhesive having conductivity, an adhesive having no conductivity may be employed.
  • the piezoelectric member 10 and the first and second plate members 11B and 12 may be joined directly or by an adhesive.
  • the adhesive is an adhesive having conductivity.
  • the piezoelectric member 10 and the first and second plate members 11D and 12D may also be joined directly or with a conductive adhesive.
  • the first and second overhang portions 114D and 124 are formed so as not to overlap each other in the thickness direction R2, but the present invention is not limited to this, and all overlap in the thickness direction R2.
  • a configuration or a configuration in which only a part thereof overlaps in the thickness direction R2 may be adopted.
  • the first to fourth metal films 13 are formed on the entire surfaces of the first and second main surfaces 101 and 102 and the first and second opposing surfaces 111 and 121. , 14, 112, 122 are formed, but the present invention is not limited to this, and a configuration formed only on a part of the entire surface may be adopted.
  • the ultrasonic probe 7 is fixed and the jaw 6 is opened and closed with respect to the ultrasonic probe 7.
  • the present invention is not limited to this.
  • the jaw 6 may be fixed and the ultrasonic probe 7 may be opened / closed with respect to the jaw 6, or both the jaw 6 and the ultrasonic probe 7 are configured to be movable so that the jaw 6 and the ultrasonic probe 7 are movable. It may be configured to open and close.
  • a configuration in which the jaw 6 is omitted may be adopted.
  • a configuration in which the piezoelectric unit 9 (9A to 9D) is also provided in the jaw 6 may be employed.
  • the treatment instrument 1 is configured to apply ultrasonic vibration to a living tissue.
  • the present invention is not limited to this, and other than ultrasonic vibration, high-frequency energy, You may employ

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Mechanical Engineering (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

L'invention concerne une unité piézoélectrique (9) comprenant : un élément piézoélectrique (10) qui possède des première et seconde surfaces primaires (101, 102) qui forment des surfaces avant et arrière et génère une vibration ultrasonore en réponse à une différence de potentiel créée entre les première et seconde surfaces primaires (101, 102) ; une première électrode (13) formée sur la première surface primaire (101) ; un premier câblage (C1) ayant une connexion conductrice avec la première électrode (13) ; une seconde électrode (14) formée sur la seconde surface primaire (102) ; un second câblage (C2) ayant une connexion conductrice avec la seconde électrode (14) ; et un premier élément de plaque (11) ayant une première surface de face (111) qui fait face à la première surface primaire (101), le premier élément de plaque (11) étant joint à la première surface primaire (101) avec la première électrode (13) interposée entre eux. Les première et seconde électrodes (13, 14) s'étendent toutes deux vers l'extérieur plus loin que l'extrémité de base du premier élément de plaque (11) dans une première direction (R3). Les premier et second câblages (C1, C2) ont respectivement des connexions conductrices avec les première et seconde électrodes (13, 14) dans une direction d'épaisseur (R2).
PCT/JP2017/013989 2017-04-03 2017-04-03 Unité piézoélectrique et outil de traitement WO2018185821A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/013989 WO2018185821A1 (fr) 2017-04-03 2017-04-03 Unité piézoélectrique et outil de traitement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/013989 WO2018185821A1 (fr) 2017-04-03 2017-04-03 Unité piézoélectrique et outil de traitement

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0365070A (ja) * 1989-06-22 1991-03-20 Hoechst Ceram Tec Ag 圧電曲げ変換器
JP2002218771A (ja) * 2001-01-24 2002-08-02 Matsushita Electric Ind Co Ltd アクチュエータおよびその製造方法
JP2015043879A (ja) * 2013-08-28 2015-03-12 オリンパス株式会社 外科用治療装置および外科用治療システム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0365070A (ja) * 1989-06-22 1991-03-20 Hoechst Ceram Tec Ag 圧電曲げ変換器
JP2002218771A (ja) * 2001-01-24 2002-08-02 Matsushita Electric Ind Co Ltd アクチュエータおよびその製造方法
JP2015043879A (ja) * 2013-08-28 2015-03-12 オリンパス株式会社 外科用治療装置および外科用治療システム

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