WO2023032464A1 - 超音波送受波器 - Google Patents
超音波送受波器 Download PDFInfo
- Publication number
- WO2023032464A1 WO2023032464A1 PCT/JP2022/026808 JP2022026808W WO2023032464A1 WO 2023032464 A1 WO2023032464 A1 WO 2023032464A1 JP 2022026808 W JP2022026808 W JP 2022026808W WO 2023032464 A1 WO2023032464 A1 WO 2023032464A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ultrasonic transducer
- projecting portion
- peripheral edge
- axis direction
- sealing material
- Prior art date
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 67
- 239000003566 sealing material Substances 0.000 claims description 68
- 239000011800 void material Substances 0.000 description 32
- 239000011358 absorbing material Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000000758 substrate Substances 0.000 description 5
- 230000009193 crawling Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/521—Constructional features
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
Definitions
- the present invention relates to an ultrasonic transducer.
- Patent Document 1 Japanese Utility Model Laid-Open No. 7-11100
- the ultrasonic sensor described in Patent Document 1 includes a housing, a vibrator, lead wires, a holding member, and a filler. A plurality of grooves are formed on the outer peripheral surface of the hold member.
- the reverberation time may become longer due to the influence of voids remaining in the grooves of the hold member when the filling material is filled.
- the present invention has been made in view of the above problems, and is capable of suppressing the creeping up of the sealing material and the removal of members from the sealing material, and suppressing the elongation of the reverberation time due to voids.
- An object is to provide a transducer.
- An ultrasonic transducer based on the present invention includes a case, a piezoelectric element, terminals, a holding member, and a sealing material.
- the case has a bottomed tubular shape having a bottom and side walls.
- a piezoelectric element is provided on the bottom inside the case.
- the terminal is electrically connected to the piezoelectric element through the wiring member inside the case and is drawn out to the outside of the case.
- a holding member holds the terminal.
- a sealing material is filled in the case.
- the holding member includes a first projecting portion, a second projecting portion, and a connecting portion that connects the first projecting portion and the second projecting portion to each other.
- the first projecting portion, the connecting portion, and the second projecting portion are arranged in this order in the first direction perpendicular to the bottom portion.
- the first projecting portion is exposed from the encapsulating material, and the connecting portion and the second projecting portion are embedded in the encapsulating material.
- the first protruding portion extends in a second direction perpendicular to the first direction, and has a first surface that protrudes from the peripheral edge of one end of the connecting portion in the first direction and faces the sealing material.
- the second protruding portion extends in a third direction orthogonal to each of the first direction and the second direction, and has a second surface protruding from the peripheral edge of the other end of the connecting portion in the first direction.
- the maximum length of protrusion of the second surface in the second direction from the peripheral edge of the other end of the connecting portion is the maximum length of protrusion of the first surface in the second direction from the peripheral edge of the one end of the connecting portion. less than half.
- the maximum length of protrusion of the first surface in the third direction from the peripheral edge of the one end of the connecting portion is the maximum length of protrusion of the second surface in the third direction from the peripheral edge of the other end of the connecting portion. less than half.
- the present invention it is possible to suppress an increase in reverberation time due to voids while suppressing creeping up of the sealing material and detachment of members from the sealing material.
- FIG. 1 is a longitudinal sectional view showing the configuration of an ultrasonic transducer according to Embodiment 1 of the present invention
- FIG. 1 is a transparent perspective view of a case and a sealing material of an ultrasonic transducer according to Embodiment 1 of the present invention
- FIG. FIG. 3 is a front view of the ultrasonic transducer of FIG. 2 as seen from the arrow III direction
- FIG. 3 is a side view of the ultrasonic transducer of FIG. 2 as seen from the arrow IV direction
- FIG. 8 is a perspective view showing through the case and sealing material of the ultrasonic transducer according to Embodiment 2 of the present invention.
- FIG. 6 is a front view of the ultrasonic transducer of FIG.
- FIG. 9 is a front view of the ultrasonic transducer of FIG. 8 as seen from the direction of arrow IX;
- FIG. 9 is a side view of the ultrasonic transducer of FIG. 8 as seen from the arrow X direction;
- FIG. 11 is a plan view of the holding member of the ultrasonic transducer according to Embodiment 4 of the present invention, viewed from the first direction;
- FIG. 9 is a front view of the ultrasonic transducer of FIG. 8 as seen from the direction of arrow IX;
- FIG. 9 is a side view of the ultrasonic transducer of FIG. 8 as seen from the arrow X direction;
- FIG. 11 is a plan view of the holding member of the ultrasonic transducer according to Embodiment 4 of the present invention, viewed from the first direction;
- FIG. 12 is a front view of the ultrasonic transducer of FIG. 11 as seen from the direction of arrow XII;
- FIG. 12 is a side view of the ultrasonic transducer of FIG. 11 as seen from the arrow XIII direction;
- FIG. 11 is a plan view of the holding member of the ultrasonic transducer according to Embodiment 5 of the present invention, viewed from the first direction;
- FIG. 15 is a front view of the ultrasonic transducer of FIG. 14 as seen from the direction of arrow XV;
- FIG. 15 is a side view of the ultrasonic transducer of FIG. 14 as seen from the direction of arrow XVI;
- FIG. 10 is a plan view of the holding member of the ultrasonic transducer according to Embodiment 6 of the present invention, viewed from the first direction;
- FIG. 18 is a front view of the ultrasonic transducer of FIG. 17 viewed from the direction of arrow XVIII;
- FIG. 18 is a side view of the ultrasonic transducer of FIG. 17 viewed from the arrow XIX direction;
- FIG. 11 is a plan view of a holding member of an ultrasonic transducer according to Embodiment 7 of the present invention, viewed from a first direction;
- FIG. 21 is a front view of the ultrasonic transducer of FIG. 20 as viewed in the direction of arrow XXI;
- FIG. 21 is a side view of the ultrasonic transducer of FIG. 20 viewed from the direction of arrow XXII;
- FIG. 11 is a plan view of a holding member of an ultrasonic transducer according to Embodiment 8 of the present invention, viewed from a first direction;
- FIG. 24 is a front view of the ultrasonic transducer of FIG. 23 as seen from the direction of arrow XXIV;
- FIG. 24 is a side view of the ultrasonic transducer of FIG. 23 as seen from the direction of arrow XXV;
- FIG. 1 is a longitudinal sectional view showing the configuration of an ultrasonic transducer according to Embodiment 1 of the present invention.
- FIG. 2 is a perspective view showing through the case and sealing material of the ultrasonic transducer according to Embodiment 1 of the present invention.
- FIG. 3 is a front view of the ultrasonic transducer of FIG. 2 as seen from the direction of arrow III.
- FIG. 4 is a side view of the ultrasonic transducer of FIG. 2 as seen from the direction of arrow IV.
- an ultrasonic transducer 100 includes a case 110, a piezoelectric element 120, terminals 130, a holding member 140, and a sealing material 180. Prepare.
- the ultrasonic transducer 100 further includes a wiring member 150 , a bonding material 160 and a sound absorbing material 170 . Note that the sound absorbing material 170 may not necessarily be provided.
- the case 110 has a bottomed tubular shape having a bottom portion 111 and side wall portions 112 .
- the side opposite to the bottom side of the case 110 is open.
- the bottom portion 111 has a disk shape.
- the side wall portion 112 extends vertically from the peripheral edge of the bottom portion 111 to the bottom portion 111 .
- Case 110 is made of, for example, aluminum.
- the piezoelectric element 120 is provided on the bottom portion 111 inside the case 110 .
- the piezoelectric element 120 is glued and fixed on the bottom portion 111 .
- the piezoelectric element 120 is made of, for example, piezoelectric ceramics, and has a disk-shaped piezoelectric substrate and electrodes provided on respective principal surfaces of the piezoelectric substrate that face each other.
- the piezoelectric element 120 has a flat plate shape, and when a drive voltage is applied, it expands in the in-plane direction and vibrates.
- the terminal 130 is electrically connected to the piezoelectric element 120 through the wiring member 150 inside the case 110 and extended to the outside of the case 110 . Although two terminals 130 are provided in this embodiment, at least one terminal 130 may be provided. Terminal 130 has a pin shape.
- the wiring member 150 is, for example, a lead wire or a flexible substrate. In this embodiment, two wiring members 150 are provided. The terminal 130 and the wiring member 150 are electrically joined together by a joining material 160 such as solder. The piezoelectric element 120 and the wiring member 150 are electrically joined together by a joining material 160 .
- One of the two terminals 130 is electrically connected through one of the two wiring members 150 to an electrode on one main surface of the piezoelectric substrate.
- the other of the two terminals 130 is electrically connected to the electrode on the other main surface of the piezoelectric substrate through the other of the two wiring members 150 .
- the sound absorbing material 170 covers the piezoelectric element 120 .
- Sound absorbing material 170 is made of, for example, polyester felt or porous silicone, and absorbs unnecessary ultrasonic waves emitted from piezoelectric element 120 to the opening side of case 110 .
- the sealing material 180 is filled inside the case 110 .
- a sealing material 180 covers the sound absorbing material 170 .
- a space above the sound absorbing material 170 in the case 110 is filled with the sealing material 180 .
- Sealing material 180 is made of, for example, rubber such as silicone rubber or urethane rubber, or resin such as epoxy resin, and has sound insulation and adhesive properties.
- the holding member 140 holds the terminals 130 .
- Terminal 130 penetrates holding member 140 .
- the terminal 130 may be press-fitted into the holding member 140, the terminal 130 may be inserted into a through hole formed in the holding member 140, or the holding member 140 may be integrally formed with the terminal 130 by insert molding or the like.
- the holding member 140 is made of resin such as polybutylene terephthalate.
- the holding member 140 includes a first projecting portion 141, a second projecting portion 142, and a connecting portion 143 that connects the first projecting portion 141 and the second projecting portion 142 to each other.
- the first projecting portion 141 , the connecting portion 143 and the second projecting portion 142 are arranged in this order in the first direction (Z-axis direction) perpendicular to the bottom portion 111 .
- the first projecting portion 141 extends in a second direction (X-axis direction) perpendicular to the first direction (Z-axis direction).
- the first overhanging portion 141 has a first surface 141b that overhangs from the peripheral edge of one end of the connecting portion 143 in the first direction (Z-axis direction) and faces the surface 180t of the sealing material 180 .
- the first projecting portion 141 has a rectangular parallelepiped shape.
- the first surface 141b is a flat surface parallel to the XY plane.
- the first projecting portion 141 is exposed from the sealing material 180 .
- the sealing material 180 is in contact with a portion of the first surface 141b near the connection portion 143, and is separated from portions other than the portion of the first surface 141b. Note that the sealing material 180 may be in contact with the entire surface of the first surface 141b.
- the second projecting portion 142 extends in a third direction (Y-axis direction) orthogonal to each of the first direction (Z-axis direction) and the second direction (X-axis direction).
- the second protruding portion 142 has a second surface 142t protruding from the peripheral edge of the other end of the connecting portion 143 in the first direction (Z-axis direction).
- the second projecting portion 142 has a rectangular parallelepiped shape.
- the second surface 142t is a flat surface parallel to the XY plane.
- the second projecting portion 142 is embedded in the sealing material 180 .
- the second surface 142t is covered with a sealing material 180. As shown in FIG.
- the connecting portion 143 extends in the first direction (Z-axis direction).
- the connecting portion 143 has a rectangular parallelepiped shape.
- the connecting portion 143 is embedded in the sealing material 180 .
- the first protruding portion 141 and the second protruding portion 142 do not overlap each other, except for the region overlapping the connecting portion 143, when viewed from the first direction (Z-axis direction).
- the maximum value of the extension length in the third direction (Y-axis direction) of the first surface 141b from the peripheral edge of the one end of the connecting portion 143 is zero. That is, as shown in FIG. 4, the first surface 141b does not protrude from the peripheral edge of the one end of the connecting portion 143 in the third direction (Y-axis direction).
- the maximum value of the extension length in the second direction (X-axis direction) of the second surface 142t from the peripheral edge of the other end of the connecting portion 143 is zero. That is, as shown in FIG. 3, the second surface 142t does not protrude from the peripheral edge of the other end of the connecting portion 143 in the second direction (X-axis direction).
- the sealing material 180 is temporarily formed at the corner Cdy between the second surface 142t and the portion facing the third direction (Y-axis direction) on the peripheral surface of the connecting portion 143.
- the void V is easily removed from the surface 180t of the sealing material 180, and the void V is formed in the first surface 180t. It is possible to suppress remaining under one surface 141b. As a result, lengthening of the reverberation time due to the void V can be suppressed.
- the first protruding portion 141 protrudes from the peripheral edge of one end of the connecting portion 143 in the first direction (Z-axis direction) and has a first surface 141b facing the surface 180t of the sealing material 180. Since the sealing material 180 in contact with the first surface 141 b spreads along the first surface 141 b when the sealing material 180 is filled, it is possible to prevent the sealing material 180 from crawling up the first projecting portion 141 . can.
- the holding member 140 can be prevented from falling out of the sealing material 180.
- each of the first protruding portion 141 and the second protruding portion 142 has a rectangular parallelepiped shape, the flat first surface 141b facing the surface 180t of the sealing material 180 is secured widely, and the sealing material 180 is effectively prevented from crawling up the first protruding portion 141, and the engagement between the second surface 142t and the sealing material 180 is strengthened to effectively prevent the holding member 140 from coming out of the sealing material 180. can be suppressed to
- Embodiment 2 An ultrasonic transducer according to Embodiment 2 of the present invention will be described below with reference to the drawings.
- the ultrasonic transducer according to Embodiment 2 of the present invention differs from the ultrasonic transducer 100 according to Embodiment 1 of the present invention in the shape of the holding member. The description of the configuration similar to that of the device 100 will not be repeated.
- FIG. 5 is a perspective view showing through the case and sealing material of the ultrasonic transducer according to Embodiment 2 of the present invention.
- FIG. 6 is a front view of the ultrasonic transducer of FIG. 5 as seen from the direction of arrow VI.
- FIG. 7 is a side view of the ultrasonic transducer of FIG. 5 as seen from the direction of arrow VII.
- the ultrasonic transmitter/receiver 200 includes a holding member 240.
- the holding member 240 includes a first projecting portion 241, a second projecting portion 242, and a connecting portion 143 that connects the first projecting portion 241 and the second projecting portion 242 to each other.
- the first projecting portion 241 extends in the second direction (X-axis direction).
- the first overhanging portion 241 has a first surface 241b that overhangs from the peripheral edge of one end of the connecting portion 143 in the first direction (Z-axis direction) and faces the surface 180t of the sealing material 180 .
- the first projecting portion 241 has a rectangular parallelepiped shape.
- the first surface 241b is a flat surface parallel to the XY plane.
- the second projecting portion 242 extends in the third direction (Y-axis direction).
- the second protruding portion 242 has a second surface 242t that protrudes from the peripheral edge of the other end of the connecting portion 143 in the first direction (Z-axis direction).
- the second projecting portion 242 has a rectangular parallelepiped shape.
- the second surface 242t is a flat surface parallel to the XY plane.
- the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 242t from the peripheral edge of the other end of the connection portion 143 is half or less of the maximum value W1 of the length of overhang in the second direction (X-axis direction) of the first surface 241b from the peripheral edge of the one end.
- the maximum value W3 of the protrusion length in the third direction (Y-axis direction) of the first surface 241b from the peripheral edge of the one end of the connecting portion 143 is is half or less of the maximum value W4 of the overhang length in the third direction (Y-axis direction) of the second surface 242t.
- the maximum value W2 of the overhang length in the second direction (X-axis direction) of the second surface 242t is small. direction) and the second surface 242t, air is less likely to be involved when the sealing material 180 is filled, thereby suppressing the generation of voids. Therefore, voids can be prevented from remaining under the first surface 241b located above the corner Cdx.
- Embodiment 3 An ultrasonic transducer according to Embodiment 3 of the present invention will be described below with reference to the drawings. Since the ultrasonic transducer according to Embodiment 3 of the present invention differs from the ultrasonic transducer 200 according to Embodiment 2 of the present invention in the shape of the second projecting portion, the ultrasonic transducer according to Embodiment 2 of the present invention is different. The description of the configuration similar to that of the sonic wave transmitter/receiver 200 will not be repeated.
- FIG. 8 is a perspective view showing through the case and sealing material of the ultrasonic transducer according to Embodiment 3 of the present invention.
- 9 is a front view of the ultrasonic transducer of FIG. 8 as seen from the direction of arrow IX.
- 10 is a side view of the ultrasonic transducer of FIG. 8 as seen from the direction of arrow X.
- FIG. 9 is a front view of the ultrasonic transducer of FIG. 8 as seen from the direction of arrow IX.
- 10 is a side view of the ultrasonic transducer of FIG. 8 as seen from the direction of arrow X.
- an ultrasonic transducer 300 includes a holding member 340.
- the holding member 340 includes a first projecting portion 241, a second projecting portion 342, and a connecting portion 143 that connects the first projecting portion 241 and the second projecting portion 342 to each other.
- the second projecting portion 342 extends in the third direction (Y-axis direction).
- the second protruding portion 342 has a second surface 342t that protrudes from the peripheral edge of the other end of the connecting portion 143 in the first direction (Z-axis direction).
- the second surface 342t is a flat surface parallel to the XY plane.
- the second projecting portion 342 has a chamfered portion 342c formed along the edge of the second surface 342t.
- the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 342t from the peripheral edge of the other end of the connection portion 143 is half or less of the maximum value W1 of the length of overhang in the second direction (X-axis direction) of the first surface 241b from the peripheral edge of the one end.
- the maximum value W3 of the protrusion length in the third direction (Y-axis direction) of the first surface 241b from the peripheral edge of the one end of the connecting portion 143 is is half or less of the maximum value W4 of the overhang length in the third direction (Y-axis direction) of the second surface 342t.
- the maximum value W2 of the overhang length in the second direction (X-axis direction) of the second surface 342t is small. direction) and the second surface 342t, air is less likely to be involved when the sealing material 180 is filled, thereby suppressing the generation of voids. Therefore, voids can be prevented from remaining under the first surface 241b located above the corner Cdx.
- Embodiment 4 An ultrasonic transducer according to Embodiment 4 of the present invention will be described below with reference to the drawings. Since the ultrasonic transducer according to Embodiment 4 of the present invention differs from the ultrasonic transducer 200 according to Embodiment 2 of the present invention in the shape of the first projecting portion, the ultrasonic transducer according to Embodiment 2 of the present invention is different. The description of the configuration similar to that of the sonic wave transmitter/receiver 200 will not be repeated.
- FIG. 11 is a plan view of the holding member of the ultrasonic transducer according to Embodiment 4 of the present invention, viewed from the first direction.
- 12 is a front view of the ultrasonic transducer of FIG. 11 as seen from the direction of arrow XII.
- FIG. 13 is a side view of the ultrasonic transducer of FIG. 11 viewed from the direction of arrow XIII.
- an ultrasonic transducer 400 includes a holding member 440.
- the holding member 440 includes a first projecting portion 441, a second projecting portion 242, and a connecting portion 143 that connects the first projecting portion 441 and the second projecting portion 242 to each other.
- the first projecting portion 441 extends in the second direction (X-axis direction).
- the first overhanging portion 441 has a first surface 441b that overhangs from the peripheral edge of one end of the connecting portion 143 in the first direction (Z-axis direction) and faces the surface 180t of the sealing material 180 .
- the first surface 441b is a flat surface parallel to the XY plane.
- the first projecting portion 441 has a chamfered portion 441c formed along the edge of the first surface 441b.
- the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 242t from the peripheral edge of the other end of the connection portion 143 is half or less of the maximum value W1 of the length of overhang in the second direction (X-axis direction) of the first surface 441b from the peripheral edge of the one end.
- the maximum value W3 of the extension length in the third direction (Y-axis direction) of the first surface 441b from the peripheral edge of the one end of the connecting portion 143 is is half or less of the maximum value W4 of the overhang length in the third direction (Y-axis direction) of the second surface 242t.
- the maximum value W2 of the overhang length in the second direction (X-axis direction) of the second surface 242t is small. direction) and the second surface 242t, air is less likely to be involved when the sealing material 180 is filled, thereby suppressing the generation of voids. Therefore, voids can be prevented from remaining under the first surface 441b located above the corner Cdx.
- the sealing material 180 is filled at the corner Cdy between the portion facing the third direction (Y-axis direction) and the second surface 242 t on the peripheral surface of the connecting portion 143 , air When a void is generated due to entrapment, the void is easily removed from the surface 180t of the sealing material 180 because the area of the first surface 441b located above the corner Cdy is small, and the void is formed under the first surface 441b. Remaining can be suppressed. As a result, it is possible to suppress the lengthening of the reverberation time due to voids.
- Embodiment 5 An ultrasonic transducer according to Embodiment 5 of the present invention will be described below with reference to the drawings.
- the ultrasonic transducer according to Embodiment 5 of the present invention differs from the ultrasonic transducer 200 according to Embodiment 2 of the present invention in the shape of the holding member. A description of the configuration similar to that of the device 200 will not be repeated.
- FIG. 14 is a plan view of the holding member of the ultrasonic transducer according to Embodiment 5 of the present invention, viewed from the first direction.
- 15 is a front view of the ultrasonic transducer of FIG. 14 as seen from the direction of arrow XV.
- 16 is a side view of the ultrasonic transducer of FIG. 14 as seen from the direction of arrow XVI.
- an ultrasonic transducer 500 includes a holding member 540.
- the holding member 540 includes a first projecting portion 541, a second projecting portion 542, and a connecting portion 143 that connects the first projecting portion 541 and the second projecting portion 542 to each other.
- the first projecting portion 541 extends in the second direction (X-axis direction).
- the first overhanging portion 541 has a first surface 541b that overhangs from the peripheral edge of one end of the connecting portion 143 in the first direction (Z-axis direction) and faces the surface 180t of the sealing material 180 .
- the first projecting portion 541 has a substantially rectangular parallelepiped shape, and chamfered portions 541c are formed at the four corners when viewed from the first direction (Z-axis direction).
- the first surface 541b is a flat surface parallel to the XY plane.
- the second projecting portion 542 extends in the third direction (Y-axis direction).
- the second protruding portion 542 has a second surface 542t that protrudes from the peripheral edge of the other end of the connecting portion 143 in the first direction (Z-axis direction).
- the second protruding portion 542 has a substantially rectangular parallelepiped shape, and chamfered portions 542c are formed at the four corners when viewed from the first direction (Z-axis direction).
- the second surface 542t is a flat surface parallel to the XY plane.
- the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 542t from the peripheral edge of the other end of the connection portion 143 is not more than half of the maximum value W1 of the extension length in the second direction (X-axis direction) of the first surface 541b from the peripheral edge of the one end.
- the maximum value W3 of the protrusion length in the third direction (Y-axis direction) of the first surface 541b from the peripheral edge of the one end of the connecting portion 143 is is half or less of the maximum value W4 of the overhang length in the third direction (Y-axis direction) of the second surface 542t.
- the maximum value W2 of the overhang length in the second direction (X-axis direction) of the second surface 542t is small. direction) and the second surface 542t, it is difficult for air to be involved when the sealing material 180 is filled, thereby suppressing the generation of voids. Therefore, it is possible to suppress the void from remaining under the first surface 541b located above the corner Cdx.
- Embodiment 6 An ultrasonic transducer according to Embodiment 6 of the present invention will be described below with reference to the drawings.
- the ultrasonic transducer according to Embodiment 6 of the present invention differs from the ultrasonic transducer 200 according to Embodiment 2 of the present invention in the shape of the holding member. A description of the configuration similar to that of the device 200 will not be repeated.
- FIG. 17 is a plan view of the holding member of the ultrasonic transducer according to Embodiment 6 of the present invention, viewed from the first direction.
- FIG. 18 is a front view of the ultrasonic transducer of FIG. 17 viewed from the direction of arrow XVIII.
- FIG. 19 is a side view of the ultrasonic transducer of FIG. 17 viewed from the arrow XIX direction.
- an ultrasonic transducer 600 includes a holding member 640.
- the holding member 640 includes a first projecting portion 641, a second projecting portion 642, and a connecting portion 143 that connects the first projecting portion 641 and the second projecting portion 642 to each other.
- the first projecting portion 641 extends in the second direction (X-axis direction).
- the first overhanging portion 641 has a first surface 641b that overhangs from the peripheral edge of one end of the connecting portion 143 in the first direction (Z-axis direction) and faces the surface 180t of the sealing material 180 .
- the first protruding portion 641 has an oval columnar shape, and has an oval shape when viewed from the first direction (Z-axis direction).
- the first surface 641b is a flat surface parallel to the XY plane.
- the second projecting portion 642 extends in the third direction (Y-axis direction).
- the second protruding portion 642 has a second surface 642t that protrudes from the peripheral edge of the other end of the connecting portion 143 in the first direction (Z-axis direction).
- the second protruding portion 642 has an oval columnar shape, and has an oval shape when viewed from the first direction (Z-axis direction).
- the second surface 642t is a flat surface parallel to the XY plane.
- the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 642t from the peripheral edge of the other end of the connection portion 143 is half or less of the maximum value W1 of the extension length in the second direction (X-axis direction) of the first surface 641b from the peripheral edge of the one end of the .
- the maximum value W3 of the protrusion length in the third direction (Y-axis direction) of the first surface 641b from the peripheral edge of the one end of the connecting portion 143 is is half or less of the maximum value W4 of the overhang length in the third direction (Y-axis direction) of the second surface 642t.
- the maximum value W2 of the overhang length in the second direction (X-axis direction) of the second surface 642t is small. direction) and the second surface 642t, air is less likely to be entrained when the sealing material 180 is filled, thereby suppressing the generation of voids. Therefore, voids can be prevented from remaining under the first surface 641b located above the corner Cdx.
- the sealing material 180 is filled at the corner Cdy between the portion facing the third direction (Y-axis direction) and the second surface 642 t on the peripheral surface of the connecting portion 143 , air When a void is generated due to entrapment, the void easily escapes from the surface 180t of the sealing material 180 because the area of the first surface 641b located above the corner Cdy is small, and the void is formed under the first surface 641b. Remaining can be suppressed. As a result, it is possible to suppress the lengthening of the reverberation time due to voids.
- Embodiment 7 An ultrasonic transducer according to Embodiment 7 of the present invention will be described below with reference to the drawings.
- the ultrasonic transducer according to Embodiment 7 of the present invention differs from the ultrasonic transducer 200 according to Embodiment 2 of the present invention in the shape of the holding member. A description of the configuration similar to that of the device 200 will not be repeated.
- FIG. 20 is a plan view of the holding member of the ultrasonic transducer according to Embodiment 7 of the present invention, viewed from the first direction.
- 21 is a front view of the ultrasonic transducer of FIG. 20 as seen from the direction of arrow XXI.
- 22 is a side view of the ultrasonic transducer of FIG. 20 as seen from the direction of arrow XXII.
- an ultrasonic transducer 700 includes a holding member 740.
- the holding member 740 includes a first projecting portion 741, a second projecting portion 742, and a connecting portion 143 that connects the first projecting portion 741 and the second projecting portion 742 to each other.
- the first projecting portion 741 extends in the second direction (X-axis direction).
- the first overhanging portion 741 has a first surface 741b that overhangs from the peripheral edge of one end of the connecting portion 143 in the first direction (Z-axis direction) and faces the surface 180t of the sealing material 180 .
- the first protruding portion 641 has a cylindrical shape, and has a circular shape when viewed from the second direction (X-axis direction).
- the first surface 741b is a curved surface.
- the second projecting portion 742 extends in the third direction (Y-axis direction).
- the second protruding portion 742 has a second surface 742t that protrudes from the peripheral edge of the other end of the connecting portion 143 in the first direction (Z-axis direction).
- the second protruding portion 742 has a cylindrical shape, and has a circular shape when viewed from the third direction (Y-axis direction).
- the second surface 742t is a curved surface.
- the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 742t from the peripheral edge of the other end of the connection portion 143 is half or less of the maximum value W1 of the projection length in the second direction (X-axis direction) of the first surface 741b from the peripheral edge of the one end of .
- the maximum value W3 of the extension length in the third direction (Y-axis direction) of the first surface 741b from the peripheral edge of the one end of the connecting portion 143 is is half or less of the maximum value W4 of the overhang length in the third direction (Y-axis direction) of the second surface 742t.
- the maximum value W2 of the overhang length in the second direction (X-axis direction) of the second surface 742t is small. direction) and the second surface 742t, air is less likely to be involved when the sealing material 180 is filled, thereby suppressing the generation of voids. Therefore, it is possible to suppress the void from remaining under the first surface 741b located above the corner Cdx.
- the sealing material 180 is filled at the corner Cdy between the portion facing the third direction (Y-axis direction) and the second surface 742 t on the peripheral surface of the connecting portion 143 , air When a void is generated due to entrapment, the void easily escapes from the surface 180t of the sealing material 180 because the area of the first surface 741b located above the corner Cdy is small, and the void is formed under the first surface 741b. Remaining can be suppressed. As a result, it is possible to suppress the lengthening of the reverberation time due to voids.
- each of the first projecting portion 741 and the second projecting portion 742 has a columnar shape, and each of the first surface 741b and the second surface 742t is a curved surface, so that the corners It is possible to effectively suppress the generation of voids in Cdx and effectively suppress the voids from remaining under the first surface 741b.
- Embodiment 8 An ultrasonic transducer according to Embodiment 8 of the present invention will be described below with reference to the drawings.
- the ultrasonic transducer according to Embodiment 8 of the present invention differs from the ultrasonic transducer 200 according to Embodiment 2 of the present invention in the shape of the holding member. A description of the configuration similar to that of the device 200 will not be repeated.
- FIG. 23 is a plan view of the holding member of the ultrasonic transducer according to Embodiment 8 of the present invention, viewed from the first direction.
- 24 is a front view of the ultrasonic transducer of FIG. 23 as seen from the direction of arrow XXIV.
- 25 is a side view of the ultrasonic transducer of FIG. 23 as seen from the direction of arrow XXV.
- an ultrasonic transmitter/receiver 800 includes a holding member 840.
- the holding member 840 includes a first projecting portion 841, a second projecting portion 842, and a connecting portion 143 that connects the first projecting portion 841 and the second projecting portion 842 to each other.
- the first projecting portion 841 extends in the second direction (X-axis direction).
- the first protruding portion 841 has a first surface 841b that protrudes from the peripheral edge of one end of the connecting portion 143 in the first direction (Z-axis direction) and faces the surface 180t of the sealing material 180 .
- the first projecting portion 841 has a trapezoidal columnar shape, and has a trapezoidal shape when viewed from the second direction (X-axis direction).
- the first surface 841b is a flat surface parallel to the XY plane.
- the first protruding portion 841 has slopes 841c on both sides in the third direction (Y-axis direction) that approach each other as the distance from the first surface 841b increases in the first direction (Z-axis direction).
- the second projecting portion 842 extends in the third direction (Y-axis direction).
- the second protruding portion 842 has a second surface 842t that protrudes from the peripheral edge of the other end of the connecting portion 143 in the first direction (Z-axis direction).
- the second protruding portion 842 has a trapezoidal columnar shape, and has a trapezoidal shape when viewed from the third direction (Y-axis direction).
- the second surface 842t is a flat surface parallel to the XY plane.
- the second protruding portion 842 has slopes 842c on both sides in the second direction (X-axis direction) that separate from the second surface 842t in the first direction (Z-axis direction).
- the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 842t from the peripheral edge of the other end of the connection portion 143 is half or less of the maximum value W1 of the length of overhang in the second direction (X-axis direction) of the first surface 841b from the peripheral edge of the one end of .
- the maximum length W3 of the projection length in the third direction (Y-axis direction) of the first surface 841b from the peripheral edge of the one end of the connecting portion 143 is is half or less of the maximum value W4 of the overhang length in the third direction (Y-axis direction) of the second surface 842t.
- the maximum value W2 of the overhang length in the second direction (X-axis direction) of the second surface 842t is small. direction) and the second surface 842t, air is less likely to be entrained when the sealing material 180 is filled, thereby suppressing the generation of voids. Therefore, voids can be prevented from remaining under the first surface 841b located above the corner Cdx.
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Abstract
Description
図1は、本発明の実施形態1に係る超音波送受波器の構成を示す縦断面図である。図2は、本発明の実施形態1に係る超音波送受波器のケースおよび封止材を透視して示す斜視図である。図3は、図2の超音波送受波器を矢印III方向から見た正面図である。図4は、図2の超音波送受波器を矢印IV方向から見た側面図である。
以下、本発明の実施形態2に係る超音波送受波器について図を参照して説明する。本発明の実施形態2に係る超音波送受波器は、保持部材の形状が本発明の実施形態1に係る超音波送受波器100と異なるため、本発明の実施形態1に係る超音波送受波器100と同様である構成については説明を繰り返さない。
以下、本発明の実施形態3に係る超音波送受波器について図を参照して説明する。本発明の実施形態3に係る超音波送受波器は、第2張出部の形状が本発明の実施形態2に係る超音波送受波器200と異なるため、本発明の実施形態2に係る超音波送受波器200と同様である構成については説明を繰り返さない。
以下、本発明の実施形態4に係る超音波送受波器について図を参照して説明する。本発明の実施形態4に係る超音波送受波器は、第1張出部の形状が本発明の実施形態2に係る超音波送受波器200と異なるため、本発明の実施形態2に係る超音波送受波器200と同様である構成については説明を繰り返さない。
以下、本発明の実施形態5に係る超音波送受波器について図を参照して説明する。本発明の実施形態5に係る超音波送受波器は、保持部材の形状が本発明の実施形態2に係る超音波送受波器200と異なるため、本発明の実施形態2に係る超音波送受波器200と同様である構成については説明を繰り返さない。
以下、本発明の実施形態6に係る超音波送受波器について図を参照して説明する。本発明の実施形態6に係る超音波送受波器は、保持部材の形状が本発明の実施形態2に係る超音波送受波器200と異なるため、本発明の実施形態2に係る超音波送受波器200と同様である構成については説明を繰り返さない。
以下、本発明の実施形態7に係る超音波送受波器について図を参照して説明する。本発明の実施形態7に係る超音波送受波器は、保持部材の形状が本発明の実施形態2に係る超音波送受波器200と異なるため、本発明の実施形態2に係る超音波送受波器200と同様である構成については説明を繰り返さない。
以下、本発明の実施形態8に係る超音波送受波器について図を参照して説明する。本発明の実施形態8に係る超音波送受波器は、保持部材の形状が本発明の実施形態2に係る超音波送受波器200と異なるため、本発明の実施形態2に係る超音波送受波器200と同様である構成については説明を繰り返さない。
Claims (5)
- 底部と側壁部とを有する有底筒状のケースと、
前記ケースの内側において前記底部上に設けられた圧電素子と、
前記ケースの内側において配線部材を通じて前記圧電素子と電気的に接続され、前記ケースの外側まで引き出された端子と、
前記端子を保持する保持部材と、
前記ケース内に充填された封止材とを備え、
前記保持部材は、第1張出部、第2張出部、および、前記第1張出部と前記第2張出部とを互いに接続する接続部を含み、
前記第1張出部、前記接続部および前記第2張出部は、前記底部と直交する第1方向においてこの順に並び、
前記第1張出部は、前記封止材から露出しており、かつ、前記接続部および前記第2張出部は、前記封止材中に埋設されており、
前記第1張出部は、前記第1方向と直交する第2方向に延在し、前記接続部の前記第1方向の一端の周縁から張り出して前記封止材と面する第1面を有し、
前記第2張出部は、前記第1方向および前記第2方向の各々と直交する第3方向に延在し、前記接続部の前記第1方向の他端の周縁から張り出した第2面を有し、
前記接続部の前記他端の周縁からの前記第2面の前記第2方向における張り出し長さの最大値は、前記接続部の前記一端の周縁からの前記第1面の前記第2方向における張り出し長さの最大値の半分以下であり、
前記接続部の前記一端の周縁からの前記第1面の前記第3方向における張り出し長さの最大値は、前記接続部の前記他端の周縁からの前記第2面の前記第3方向における張り出し長さの最大値の半分以下である、超音波送受波器。 - 前記接続部の前記一端の周縁からの前記第1面の前記第3方向における張り出し長さの最大値が0であり、
前記接続部の前記他端の周縁からの前記第2面の前記第2方向における張り出し長さの最大値が0である、請求項1に記載の超音波送受波器。 - 前記第1張出部および前記第2張出部の各々は、直方体形状を有している、請求項1または請求項2に記載の超音波送受波器。
- 前記第2張出部は、前記第2面の縁に沿って形成された面取り部を有する、請求項3に記載の超音波送受波器。
- 前記第1張出部および前記第2張出部の各々は、円柱形状を有している、請求項1または請求項2に記載の超音波送受波器。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0711100U (ja) * | 1993-07-09 | 1995-02-14 | 日本無線株式会社 | 超音波センサーの振動子の保持構造 |
JP2006352829A (ja) * | 2005-05-20 | 2006-12-28 | Murata Mfg Co Ltd | 超音波センサ |
JP2012010312A (ja) * | 2010-05-28 | 2012-01-12 | Murata Mfg Co Ltd | 超音波センサ |
WO2019087634A1 (ja) * | 2017-11-02 | 2019-05-09 | 株式会社村田製作所 | 超音波センサ |
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2021
- 2021-10-20 CN CN202122530732.XU patent/CN215990767U/zh active Active
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0711100U (ja) * | 1993-07-09 | 1995-02-14 | 日本無線株式会社 | 超音波センサーの振動子の保持構造 |
JP2006352829A (ja) * | 2005-05-20 | 2006-12-28 | Murata Mfg Co Ltd | 超音波センサ |
JP2012010312A (ja) * | 2010-05-28 | 2012-01-12 | Murata Mfg Co Ltd | 超音波センサ |
WO2019087634A1 (ja) * | 2017-11-02 | 2019-05-09 | 株式会社村田製作所 | 超音波センサ |
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