WO2013051525A1 - 超音波センサ - Google Patents
超音波センサ Download PDFInfo
- Publication number
- WO2013051525A1 WO2013051525A1 PCT/JP2012/075448 JP2012075448W WO2013051525A1 WO 2013051525 A1 WO2013051525 A1 WO 2013051525A1 JP 2012075448 W JP2012075448 W JP 2012075448W WO 2013051525 A1 WO2013051525 A1 WO 2013051525A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- case
- flexible substrate
- ultrasonic sensor
- piezoelectric element
- pin terminals
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 75
- 238000013016 damping Methods 0.000 claims abstract description 25
- 239000000758 substrate Substances 0.000 claims description 75
- 238000007789 sealing Methods 0.000 claims 1
- 229920005989 resin Polymers 0.000 description 13
- 239000011347 resin Substances 0.000 description 13
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 7
- 230000006378 damage Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- CNQCVBJFEGMYDW-UHFFFAOYSA-N lawrencium atom Chemical compound [Lr] CNQCVBJFEGMYDW-UHFFFAOYSA-N 0.000 description 6
- 239000012779 reinforcing material Substances 0.000 description 6
- 239000011358 absorbing material Substances 0.000 description 5
- 229910000679 solder Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011359 shock absorbing material Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
-
- 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
- B06B1/0644—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 using a single piezoelectric element
-
- 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
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
-
- 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
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
- G10K9/22—Mountings; Casings
-
- 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
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
- G01S2015/932—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles for parking operations
Definitions
- the present invention relates to an ultrasonic sensor, and more particularly to an ultrasonic sensor having a piezoelectric element and a pin terminal electrically connected to the piezoelectric element, and used for, for example, a corner sonar or a back sonar of an automobile.
- the ultrasonic sensor detects an obstacle or target by intermittently transmitting an ultrasonic pulse signal and receiving a reflected wave reflected after the transmitted ultrasonic pulse signal reaches the obstacle or target.
- Ultrasonic sensors are used for back sonars, corner sonars of automobiles, and parking spot sensors for detecting distances from obstacles such as side walls in parallel parking.
- FIG. 6 is a cross-sectional view showing a configuration example of a conventional ultrasonic sensor.
- the ultrasonic sensor 101 includes a case 102, a piezoelectric element 103, a damping material 104, a substrate 105, a foamable resin 106, pin terminals 107A and 107B, and lead wires 108A and 108B.
- the case 102 has a bottomed cylindrical shape and is made of a conductive material such as metal.
- the piezoelectric element 103 is made of piezoelectric ceramics, and has a disk-shaped piezoelectric substrate and a pair of electrodes provided on the principal surfaces of the piezoelectric substrate facing each other.
- the piezoelectric element 103 is bonded to the case 102 with a conductive adhesive or the like so that one electrode contacts the bottom surface of the opening of the case 102 and is electrically connected to the case 102.
- the damping material 104 is provided so as to close the opening of the case 102.
- the substrate 105 is provided on the damping material 104.
- the substrate 105 and the damping material 104 are provided with through holes.
- the foamable resin 106 is injected from one of the through holes into the opening of the case 102 and filled in the case 102 and the through holes.
- Each of the pin terminals 107A and 107B has a straight bar shape, and is inserted into the opening of the case 102 through one of the through holes.
- the lead wire 108 ⁇ / b> A is joined to the tip of the pin terminal 107 ⁇ / b> A and the case 102 by solder in the opening of the case 102, and electrically connects the pin terminal 107 ⁇ / b> A and the case 102.
- the pin terminal 107 ⁇ / b> A is electrically connected to the piezoelectric element 103 via the lead wire 108 ⁇ / b> A and the case 102.
- the lead wire 108B is joined to the tip of the pin terminal 107B and the piezoelectric element 103 by solder, and electrically connects the tip of the pin terminal 107B and the piezoelectric element 103.
- the lead wire is deformed by applying an external force to the pin terminal. If the lead wire is deformed many times due to external force applied to the pin terminal multiple times, the connection between the pin terminal and the lead wire may be broken, and the electrical connection between the pin terminal and the piezoelectric element may be broken There is.
- the ultrasonic sensor has a configuration with higher resistance to external force.
- an object of the present invention is to realize an ultrasonic sensor that is less likely to cause disconnection of electrical connection between a pin terminal and a piezoelectric element and that has high resistance to external force.
- the ultrasonic sensor of the present invention includes a case, a piezoelectric element, a pin terminal, a flexible substrate, and a damping material.
- the case has a bottomed cylindrical shape and has a bottom plate and a side wall.
- the piezoelectric element is disposed on the bottom plate in the case.
- One end of the pin terminal is disposed in the opening of the case, and the other end is disposed outside the case.
- the flexible substrate is strip-shaped and has a first end connected to one tip of the pin terminal and a second end connected to the piezoelectric element.
- the vibration damping material seals one end portion of the pin terminal and the flexible substrate within the case.
- the flexible substrate has a first end extending along the same direction as one of the tip ends of the pin terminal, bent from the first end, extended to the side wall of the case, and reached the second end. It is bent inside.
- one end portion of the pin terminal is soldered to the first end of the flexible substrate.
- the connecting portion with the pin terminal is broken, and the electrical connection between the pin terminal and the piezoelectric element is broken. Can be prevented.
- the contact area between the flexible substrate and the damping material increases, and the damping material is not easily destroyed even when the flexible substrate is deformed.
- the curvature of the flexible substrate can be lowered and the elastic force of the flexible substrate can be reduced. it can. For this reason, generation
- FIG. 1A is a cross-sectional view of the ultrasonic sensor 1 according to the first embodiment of the present invention.
- FIG. 1B is a plan view of the ultrasonic sensor 1.
- FIG. 1B shows the back surface of the ultrasonic sensor 1.
- the ultrasonic sensor 1 includes a case 2, a piezoelectric element 3, a sound absorbing material 4, a reinforcing material 5, a support material 6, a buffer material 7, a vibration damping material 8, a flexible substrate 9, and a terminal holding material 10. And pin terminals 11A and 11B.
- the case 2 has a bottomed cylindrical shape in which one end surface is closed and the other end surface is open, and includes a cylindrical side wall 2A and a disk-shaped bottom plate 2B. As shown in FIG. 1B, the opening of the case 2 is circular in plan view. In the side wall 2A, the portion on the opening side is thin and the inside diameter of the opening is large, and the portion on the bottom plate 2B side is thick and the inside diameter of the opening is small.
- the bottom plate 2B includes a recess 2B1 near the center. Recess 2B1 has a bottom surface portion and a side wall portion.
- the case 2 is a member made of lightweight aluminum having a high elastic modulus, for example, and is formed by forging.
- the material of the case 2 is not limited to a conductive material such as aluminum, and may be an insulating material.
- the piezoelectric element 3 is made of piezoelectric ceramics, and includes a disk-shaped piezoelectric substrate and a pair of electrodes provided on main surfaces of the piezoelectric substrate facing each other.
- the piezoelectric element 3 has a flat plate shape and spreads in the in-plane direction and vibrates when a driving voltage is applied to a pair of electrodes.
- the piezoelectric element 3 is disposed inside the recess 2B1 of the case 2 and joined to the bottom plate 2B. Specifically, the piezoelectric element 3 is joined to the case 2 so that one of the pair of electrodes is in contact with the bottom surface of the recess 2B1. In other words, the piezoelectric element 3 is disposed on the bottom surface of the recess 2B1.
- the piezoelectric element 3 and the bottom plate 2B are joined together to form a bimorph vibrator.
- This bimorph vibrator is bent and vibrated by the spreading vibration of the piezoelectric element 3. Therefore, the bottom surface portion of the recess 2 ⁇ / b> B ⁇ b> 1 becomes the main vibration region of the case 2.
- the sound absorbing material 4 is a flat plate made of polyester felt, for example, and is provided to absorb unnecessary sound waves emitted from the piezoelectric element 3 to the opening side of the case 2.
- the sound absorbing material 4 is disposed in the recess 2 ⁇ / b> B ⁇ b> 1 of the case 2 and is bonded onto the piezoelectric element 3.
- the reinforcing material 5 is a ring-shaped member having an opening at the center, and has high acoustic impedance.
- the reinforcing material 5 is made of a material having higher density and higher rigidity than the material constituting the case 2 such as stainless steel or zinc, and functions as a weight.
- the reinforcing material 5 may be made of the same material (aluminum) as the case 2 by adjusting the size such as thickness.
- the reinforcing material 5 is disposed on the bottom plate 2B of the case 2 so as to contact the inner peripheral surface of the thick portion of the side wall 2A.
- the reinforcing material 5 By providing the reinforcing material 5 in this way, the rigidity of the surrounding portion surrounding the recess 2B1 of the case 2 is increased, and the vibration in the bottom plate 2B of the case 2 can be prevented from being transmitted to the side wall 2A of the case 2.
- the support member 6 is a ring-shaped member having an opening in the center, and is provided between the side wall 2 ⁇ / b> A of the case 2 and the buffer material 7 in order to support the buffer material 7 without contacting the case 2. .
- the support member 6 is formed by filling the space between the mold and the case 2 with a mold placed inside the case 2 and curing the resin before removing the mold.
- the support member 6 may be formed inside the case 2 using the mold and the case 2 as described above, or a support member 6 formed in a desired shape in advance inside the case 2. You may arrange.
- the buffer material 7 is a cup-shaped member made of an elastic body such as silicone rubber or urethane resin.
- the shock-absorbing material 7 is provided at the lower portion, and has a convex portion that engages with the opening of the reinforcing member 5, and an opening that is provided at the upper portion and engages with the terminal holding material 10.
- the terminal holding material 10 is an L-shaped member made of a resin such as polybutylene terephthalate (PBT), and holds the pin terminals 11A and 11B in a posture along an axis passing through the center of the opening of the case 2.
- the lower portion of the terminal holding member 10 is bent so as to engage with an opening provided in the upper portion of the cushioning member 7.
- the terminal holding material 10 has a convex portion provided on the bottom surface. Further, two through holes through which the pin terminals 11 ⁇ / b> A and 11 ⁇ / b> B are inserted are provided in the central portion of the terminal holding material 10.
- the pin terminals 11 ⁇ / b> A and 11 ⁇ / b> B are metal linear pins to which the drive voltage of the piezoelectric element 3 is applied, and are held by the terminal holding material 10. Specifically, the pin terminals 11 ⁇ / b> A and 11 ⁇ / b> B are inserted into the through holes of the terminal holding material 10, respectively. One end of each of the pin terminals 11 ⁇ / b> A and 11 ⁇ / b> B is exposed from the through hole of the terminal holding member 10 and is disposed in the opening of the case 2. The other tip ends of the pin terminals 11 ⁇ / b> A and 11 ⁇ / b> B protrude from the upper end of the terminal holding member 10 and are arranged outside the case 2.
- the flexible substrate 9 has a wide band shape, and electrically connects the pin terminals 11A and 11B and the piezoelectric element 3.
- the flexible substrate 9 has a first end and a second end. The first end extends along the same direction as one end of the pin terminals 11A and 11B and is connected to the pin terminals 11A and 11B. The second end is connected to the electrode of the piezoelectric element 3 by a conductive adhesive.
- the flexible substrate 9 is bent from the first end, extends toward the side wall 2A of the case 2, passes through the inside of the support member 6, and is bent and disposed in the opening of the case 2 so as to reach the second end. ing.
- the support member 6 is provided by being filled and cured in a state where the piezoelectric element 3 and the flexible substrate 9 are disposed in the opening of the case 2.
- FIG. 1A only the pin terminal 11A is shown, but the pin terminal 11B is also connected to the flexible substrate 9 in the same manner as the pin terminal 11A.
- the vibration damping material 8 is made of an elastic body such as silicone resin or urethane resin.
- the damping material 8 is filled in the case 2 and seals one end portion of the pin terminals 11 ⁇ / b> A and 11 ⁇ / b> B disposed in the opening of the case 2 and the flexible substrate 9.
- the vibration damping material 8 is filled only in the space on the opening side of the case 2.
- the damping material 8 has a function of suppressing vibration of the side wall 2 ⁇ / b> A of the case 2 and also has a function of preventing the support material 6 and the cushioning material 7 from being detached from the case 2.
- the vibration in the bottom plate 2B of the case 2 is attenuated by the sound absorbing material 4, the support material 6, and the buffer material 7, and thus almost propagates to the terminal holding material 10 and the pin terminals 11A and 11B. There is nothing. Therefore, vibration leakage from the pin terminals 11A and 11B to the external substrate that occurs when the ultrasonic sensor 1 is mounted on the external substrate is greatly reduced.
- the support material 6 and the buffer material 7 are difficult to propagate vibration, and the vibration damping material 8 is one that suppresses (vibrates) the vibration of the side wall 2A of the case 2.
- the support material 6 and the buffer material 7 preferably have a lower elastic modulus than the vibration damping material 8. More specifically, the elastic modulus includes a storage elastic modulus and a loss elastic modulus. It is preferable that the support material 6 and the buffer material 7 have a small storage elastic modulus, and the damping material 8 has a large loss elastic modulus.
- the support material 6 and the buffer material 7 are preferably made of a silicone resin (silicone rubber), and the vibration damping material 8 is preferably made of a urethane resin.
- the flexible substrate 9 since the pin terminals 11A and 11B and the piezoelectric element 3 are connected by the flexible substrate 9, even if an external force is applied to the pin terminals 11A and 11B a plurality of times, the flexible substrate is provided each time the external force is applied to the pin terminals 11A and 11B. 9 is elastically deformed, the connecting portion between the flexible substrate 9 and the pin terminals 11A and 11B is not broken, and the electrical connection between the pin terminals 11A and 11B and the piezoelectric element 3 is not broken.
- the flexible substrate 9 has a strip shape and has a larger contact area with the damping material 8 than the lead wire, even if a large external force is applied to the pin terminals 11A and 11B at a time, the damping material 8 is locally loaded. However, the damping material 8 is not broken.
- FIG. 2A is a diagram for explaining the stress applied to the connecting portion in the ultrasonic sensor 1 according to the present embodiment.
- FIG. 2B is a diagram for explaining the stress applied to the connecting portion in the ultrasonic sensor 111 according to the comparative example. 2A and 2B, only the pin terminal 11A is shown, but the pin terminal 11B is also connected to the flexible substrate 9 like the pin terminal 11A.
- the first end of the flexible substrate 9 and the tip ends of the pin terminals 11A and 11B extend in the same direction and are connected by solder (not shown) or the like. Since the flexible substrate 9 extends from the first end, which is a connection portion with the pin terminals 11A and 11B, to the side wall 2A side of the case 2, it is bent with a certain curvature.
- the ultrasonic sensor 111 according to the comparative example is different from the ultrasonic sensor 1 according to the present embodiment in the connection portion between the flexible substrate 9 and the pin terminals 11A and 11B, and the other configurations are the same.
- the first end of the flexible substrate 9 and the tip portions of the pin terminals 11A and 11B extend in the opposite direction and are connected by solder (not shown) or the like.
- the flexible substrate 9 extends in the axial direction of the case 2 from a first end that is a connection portion with the pin terminals 11A and 11B.
- the ultrasonic sensor 1 according to the present embodiment is more piezoelectric than the ultrasonic sensor 111 according to the comparative example, because the connecting portion between the flexible substrate 9 and the pin terminals 11A and 11B is broken. Disconnection of electrical connection with the element 3 is unlikely to occur.
- FIG. 3 is a diagram for explaining the relationship between the loading direction and the destruction mode.
- FIG. 3A is a diagram for explaining a weighting direction applied to the pin terminals 11A and 11B.
- FIG. 3B is a diagram showing the relationship between the weighting direction and the destruction mode for the ultrasonic sensor 1 according to this embodiment.
- FIG. 3C is a diagram illustrating the relationship between the weighting direction and the destruction mode for the ultrasonic sensor 111 according to the comparative example.
- the weight corresponds to the external force.
- the resin destruction means that a member made of resin such as the vibration damping material 8 is destroyed.
- both the ultrasonic sensor 1 and the ultrasonic sensor 111 are The resin breakage occurred before the disconnection of the electrical connection between the terminals 11A and 11B and the piezoelectric element 3.
- the ultrasonic sensor 1 when a weight in the direction (+ Z direction) in which the pin terminals 11A and 11B are pulled out from the case 2 is applied to the pin terminals 11A and 11B, the ultrasonic sensor 1 has an electrical connection between the pin terminals 11A and 11B and the piezoelectric element 3. The resin breakage occurred prior to the disconnection of a typical connection. On the other hand, in the ultrasonic sensor 111, disconnection of the electrical connection between the pin terminals 11A and 11B and the piezoelectric element 3 occurred before the resin breakage.
- the ultrasonic sensor 1 is different from the ultrasonic sensor 111 of the comparative example in the configuration of the connection portion between the flexible substrate 9 and the pin terminals 11A and 11B.
- disconnection of the electrical connection between the pin terminals 11A and 11B and the piezoelectric element 3 hardly occurs.
- the direction in which the first end of the flexible substrate 9 extends and the direction in which the tip ends of the pin terminals 11A and 11B extend are the same, and the first end of the flexible substrate 9 and the pin terminals 11A and 11B Even though the tip ends are connected, even when their extending directions are opposite to each other, they extend from the first end, which is the connecting portion with the pin terminals 11A and 11B, to the side wall 2A side of the case 2 and bend with a certain curvature.
- the connection portion between the flexible substrate 9 and the pin terminals 11A and 11B is not broken, and the electrical connection between the pin terminals 11A and 11B and the piezoelectric element 3 is disconnected. It can be prevented from occurring.
- FIG. 4 is a cross-sectional view of the ultrasonic sensor 21 according to the second embodiment of the present invention.
- the ultrasonic sensor 21 includes two flexible substrates 29A and 29B.
- the flexible substrate 29A is for electrically connecting the pin terminal 11A and one of the pair of electrodes of the piezoelectric element 3.
- the flexible substrate 29B is for electrically connecting the pin terminal 11B (not shown) and the other of the pair of electrodes of the piezoelectric element 3.
- a plurality of flexible substrates 29A and 29B may be provided and each may be electrically connected to the electrode of the piezoelectric element 3.
- FIG. 5 is a sectional view of an ultrasonic sensor 31 according to the third embodiment of the present invention.
- the ultrasonic sensor 31 includes two flexible substrates 39A and 39B.
- the flexible substrate 39A electrically connects the pin terminal 11A and one of the pair of electrodes of the piezoelectric element 3.
- the flexible substrate 39B electrically connects the pin terminal 11B (not shown) and the case 2.
- the pin terminal 11B is electrically connected to the other (ground potential) of the pair of electrodes of the piezoelectric element 3 via the flexible substrate 39B and the case 102.
- the present invention can be implemented, but the specific configuration of the ultrasonic sensor is not limited to the above.
- any specific shape or material such as cushioning material, support material, reinforcement material, support material, sound absorbing material may be used, and cushioning material, support material, reinforcement material, support material, sound absorption material may be It is not always necessary to provide each.
Abstract
Description
図1(A)は、本発明の第1の実施形態に係る超音波センサ1の断面図である。また、図1(B)は、超音波センサ1の平面図である。なお、図1(B)は、超音波センサ1の背面を示す。
次に、本発明の第2の実施形態に係る超音波センサ21の構成例について説明する。
次に、本発明の第3の実施形態に係る超音波センサ31の構成例について説明する。
2…ケース
2A…側壁
2B…底板
2B1…凹部
3…圧電素子
4…吸音材
5…補強材
6…支持材
7…緩衝材
8…制振材
9,29A,29B,39A,39B…フレキシブル基板
10…端子保持材
11A,11B…ピン端子
Claims (2)
- 底板と側壁とを有する、有底筒状のケースと、
前記ケース内で前記底板上に配置されている圧電素子と、
一方の先端部が前記ケースの開口内に配置されており、他方の先端部が前記ケースの外部に配置されているピン端子と、
前記ピン端子の一方の先端部に接続されている第一端と、前記圧電素子に接続されている第二端とを有する、帯状のフレキシブル基板と、
前記ケース内で前記ピン端子の一方の先端部と前記フレキシブル基板とを封止している制振材と、を備え、
前記フレキシブル基板は、前記第一端が前記ピン端子の一方の先端部と同方向に沿って延び、前記第一端から屈曲して前記ケースの側壁側に延びて前記第二端に至るように、前記ケースの開口内に屈曲して配置されている、超音波センサ。 - 前記ピン端子の一方の先端部は、前記フレキシブル基板の第一端にはんだ付けされている、請求項1に記載の超音波センサ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12838230.6A EP2765789B1 (en) | 2011-10-05 | 2012-10-02 | Ultrasonic sensor |
KR1020147008635A KR101491510B1 (ko) | 2011-10-05 | 2012-10-02 | 초음파 센서 |
CN201280048814.1A CN103858445B (zh) | 2011-10-05 | 2012-10-02 | 超声波传感器 |
JP2013537506A JP5590248B2 (ja) | 2011-10-05 | 2012-10-02 | 超音波センサ |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011-220673 | 2011-10-05 | ||
JP2011220673 | 2011-10-05 |
Publications (1)
Publication Number | Publication Date |
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WO2013051525A1 true WO2013051525A1 (ja) | 2013-04-11 |
Family
ID=48043683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2012/075448 WO2013051525A1 (ja) | 2011-10-05 | 2012-10-02 | 超音波センサ |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2765789B1 (ja) |
JP (1) | JP5590248B2 (ja) |
KR (1) | KR101491510B1 (ja) |
CN (1) | CN103858445B (ja) |
WO (1) | WO2013051525A1 (ja) |
Cited By (5)
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WO2014171158A1 (ja) * | 2013-04-19 | 2014-10-23 | 株式会社村田製作所 | 超音波センサおよびその製造方法 |
JP2018101924A (ja) * | 2016-12-21 | 2018-06-28 | 上田日本無線株式会社 | 超音波振動子 |
WO2022185744A1 (ja) * | 2021-03-02 | 2022-09-09 | 株式会社村田製作所 | 超音波センサ |
WO2023203879A1 (ja) * | 2022-04-19 | 2023-10-26 | 株式会社村田製作所 | 超音波トランスデューサおよびその製造方法 |
JP7384075B2 (ja) | 2020-03-06 | 2023-11-21 | Tdk株式会社 | 圧電デバイス |
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JP6418315B2 (ja) * | 2015-02-16 | 2018-11-07 | 株式会社村田製作所 | 超音波センサ |
CN107068139B (zh) * | 2017-04-17 | 2020-12-25 | 常州市富盛星特电子有限公司 | Ai插件式蜂鸣器及制造导针弹片的方法 |
JPWO2020158952A1 (ja) * | 2019-01-31 | 2021-12-02 | 太陽誘電株式会社 | 振動センサ |
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WO2022185744A1 (ja) * | 2021-03-02 | 2022-09-09 | 株式会社村田製作所 | 超音波センサ |
WO2023203879A1 (ja) * | 2022-04-19 | 2023-10-26 | 株式会社村田製作所 | 超音波トランスデューサおよびその製造方法 |
Also Published As
Publication number | Publication date |
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CN103858445A (zh) | 2014-06-11 |
JP5590248B2 (ja) | 2014-09-17 |
EP2765789A1 (en) | 2014-08-13 |
KR20140053401A (ko) | 2014-05-07 |
JPWO2013051525A1 (ja) | 2015-03-30 |
KR101491510B1 (ko) | 2015-02-09 |
EP2765789B1 (en) | 2022-10-05 |
CN103858445B (zh) | 2016-09-28 |
EP2765789A4 (en) | 2016-03-02 |
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