Ultrasonic transceiver

Abstract

The maximum extension length in the second direction (X-axis direction) of the second surface (142t) starting from the periphery of one end of the connecting part (143) is less than half the maximum extension length in the second direction (X-axis direction) of the first surface (141b) starting from the periphery of one end of the connecting part (143). The maximum extension length in the third direction (Y-axis direction) of the first surface (141b) starting from the periphery of one end of the connecting part (143) is less than half the maximum extension length in the third direction (Y-axis direction) of the second surface (142t) starting from the periphery of the other end of the connecting part (143).

Description

Technical Field

[0001] This invention relates to ultrasonic transceivers. Background Technology

[0002] As a prior art document disclosing the structure of an ultrasonic sensor, there is Japanese Utility Model Application Publication No. 7-11100 (Patent Document 1). The ultrasonic sensor described in Patent Document 1 includes a housing, a transducer, a lead wire, a holding member, and a filling material. Multiple grooves are formed on the outer peripheral surface of the holding member.

[0003] Prior art literature

[0004] Patent documents

[0005] Patent Document 1: Japanese Utility Model Application Publication No. 7-11100 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] In the ultrasonic sensor described in Patent Document 1, the reverberation time is prolonged due to the voids remaining in the groove of the holding member when the filling material is filled.

[0008] The present invention was made in view of the above-mentioned problems, and its object is to provide an ultrasonic transceiver that can suppress the rise of sealing material and the detachment of components from the sealing material while suppressing the reverberation time caused by voids for a longer period of time.

[0009] Technical solutions for solving the problem

[0010] The ultrasonic transceiver according to the present invention includes a housing, a piezoelectric element, terminals, a retaining member, and a sealing material. The housing is a bottomed cylindrical shape having a bottom and sidewalls. The piezoelectric element is disposed on the bottom inside the housing. The terminals are electrically connected to the piezoelectric element inside the housing via a wiring member and are led out to the outside of the housing. The retaining member holds the terminals. The sealing material is filled into the housing. The retaining member includes a first protrusion, a second protrusion, and a connecting portion connecting the first protrusion and the second protrusion to each other. The first protrusion, the connecting portion, and the second protrusion are arranged sequentially in a first direction orthogonal to the bottom. The first protrusion protrudes from the sealing material, and the connecting portion and the second protrusion are embedded in the sealing material. The first protrusion extends in a second direction orthogonal to the first direction and has a first surface extending from the periphery of one end of the connecting portion in the first direction and facing the sealing material. The second protrusion extends in a third direction orthogonal to both the first and second directions and has a second surface extending from the periphery of the other end of the connecting portion in the first direction. The maximum extension length from the periphery of the other end of the connecting portion in the second direction of the second surface is less than half the maximum extension length from the periphery of the connecting portion in the second direction of the first surface. The maximum extension length from the periphery of the connecting portion in the third direction of the first surface is less than half the maximum extension length from the periphery of the other end of the connecting portion in the third direction of the second surface.

[0011] The effects of the invention

[0012] According to the present invention, it is possible to suppress the creep of the sealing material and the detachment of the component from the sealing material while suppressing the prolonged reverberation time caused by the voids. Attached Figure Description

[0013] Figure 1 This is a longitudinal sectional view showing the structure of the ultrasonic transceiver according to Embodiment 1 of the present invention.

[0014] Figure 2 This is a perspective view showing the housing and sealing material of the ultrasonic transceiver according to Embodiment 1 of the present invention.

[0015] Figure 3 Viewed from the direction of arrow III Figure 2 Front view of an ultrasonic transceiver.

[0016] Figure 4 Viewed from the direction of arrow IV Figure 2 A side view of an ultrasonic transceiver.

[0017] Figure 5 This is a perspective view showing the housing and sealing material of the ultrasonic transceiver according to Embodiment 2 of the present invention.

[0018] Figure 6 Viewed from the direction of arrow VI Figure 5 Front view of an ultrasonic transceiver.

[0019] Figure 7 Viewed from the direction of arrow VII Figure 5 A side view of an ultrasonic transceiver.

[0020] Figure 8 This is a perspective view showing the housing and sealing material of the ultrasonic transceiver according to Embodiment 3 of the present invention.

[0021] Figure 9 Viewed from the direction of arrow Iv Figure 8 Front view of an ultrasonic transceiver.

[0022] Figure 10 Viewed from the direction of arrow X Figure 8 A side view of an ultrasonic transceiver.

[0023] Figure 11 This is a top view of the holding member of the ultrasonic transceiver according to Embodiment 4 of the present invention, viewed from the first direction.

[0024] Figure 12 Viewed from the direction of arrow XII Figure 11 Front view of an ultrasonic transceiver.

[0025] Figure 13 Viewed from the direction of arrow XIII Figure 11 A side view of an ultrasonic transceiver.

[0026] Figure 14 This is a top view of the holding member of the ultrasonic transceiver according to Embodiment 5 of the present invention, viewed from the first direction.

[0027] Figure 15 Viewed from the direction of arrow XV Figure 14 Front view of an ultrasonic transceiver.

[0028] Figure 16 Viewed from the direction of arrow XVI Figure 14 A side view of an ultrasonic transceiver.

[0029] Figure 17 This is a top view of the holding member of the ultrasonic transceiver according to Embodiment 6 of the present invention, viewed from the first direction.

[0030] Figure 18 Viewed from the direction of arrow XVIII Figure 17 Front view of an ultrasonic transceiver.

[0031] Figure 19 Viewed from the direction of arrow XIX Figure 17 A side view of an ultrasonic transceiver.

[0032] Figure 20 This is a top view of the holding member of the ultrasonic transceiver according to Embodiment 7 of the present invention, viewed from the first direction.

[0033] Figure 21 Observing from the direction of arrow XXI Figure 20 Front view of an ultrasonic transceiver.

[0034] Figure 22 Observing from the direction of arrow XXII Figure 20 A side view of an ultrasonic transceiver.

[0035] Figure 23 This is a top view of the holding member of the ultrasonic transceiver according to Embodiment 8 of the present invention, viewed from the first direction.

[0036] Figure 24 Observing from the direction of arrow XXIV Figure 23 Front view of an ultrasonic transceiver.

[0037] Figure 25 Observing from the direction of arrow XXV Figure 23 A side view of an ultrasonic transceiver. Detailed Implementation

[0038] Hereinafter, ultrasonic transceivers according to various embodiments of the present invention will be described with reference to the accompanying drawings. In the following description of the embodiments, the same or equivalent parts in the drawings will be labeled with the same reference numerals, and their descriptions will not be repeated.

[0039] (Implementation Method 1)

[0040] Figure 1 This is a longitudinal sectional view showing the structure of the ultrasonic transceiver according to Embodiment 1 of the present invention. Figure 2 This is a perspective view showing the housing and sealing material of the ultrasonic transceiver according to Embodiment 1 of the present invention. Figure 3 Viewed from the direction of arrow III Figure 2 Front view of an ultrasonic transceiver. Figure 4 Viewed from the direction of arrow IV Figure 2 A side view of an ultrasonic transceiver.

[0041] like Figures 1-4As shown, the ultrasonic transceiver 100 according to Embodiment 1 of the present invention includes a housing 110, a piezoelectric element 120, a terminal 130, a retaining member 140, and a sealing material 180. In this embodiment, the ultrasonic transceiver 100 also includes a wiring member 150, a bonding material 160, and a sound-absorbing material 170. However, it is not always necessary to include the sound-absorbing material 170.

[0042] The housing 110 is a bottomed cylindrical shape having a bottom 111 and sidewall portions 112. The housing 110 has an opening on the side opposite to the bottom side. The bottom 111 has a circular plate shape. The sidewall portions 112 stand upright from the periphery of the bottom 111 and are perpendicular to the bottom 111. The housing 110 is formed, for example, of aluminum.

[0043] A piezoelectric element 120 is disposed on the bottom 111 inside the housing 110. The piezoelectric element 120 is bonded and fixed to the bottom 111. The piezoelectric element 120, for example, has a piezoelectric substrate made of piezoelectric ceramic and in the shape of a circular plate, and electrodes respectively disposed on the opposing main surfaces of the piezoelectric substrate. The piezoelectric element 120 is flat and expands and vibrates in the in-plane direction when a driving voltage is applied.

[0044] Terminal 130 is electrically connected to piezoelectric element 120 on the inside of housing 110 via wiring member 150 and is led out to the outside of housing 110. Although two terminals 130 are provided in this embodiment, it is sufficient to provide at least one terminal 130. Terminal 130 has a pin shape.

[0045] The wiring component 150 is, for example, a lead wire or a flexible substrate. In this embodiment, two wiring components 150 are provided. The terminal 130 and the wiring component 150 are electrically connected to each other by a bonding material 160 such as solder. The piezoelectric element 120 and the wiring component 150 are electrically connected to each other by the bonding material 160.

[0046] One of the two terminals 130 is electrically connected to an electrode on one main surface of the piezoelectric substrate via one of the two wiring members 150. The other of the two terminals 130 is electrically connected to an electrode on the other main surface of the piezoelectric substrate via the other of the two wiring members 150.

[0047] Sound-absorbing material 170 covers piezoelectric element 120. The sound-absorbing material 170 is made of, for example, polyester felt or porous silicone, and absorbs unwanted ultrasonic waves emitted from piezoelectric element 120 to the opening side of housing 110.

[0048] Sealing material 180 is filled into housing 110. Sealing material 180 covers sound-absorbing material 170. Sealing material 180 fills the space on sound-absorbing material 170 within housing 110. Sealing material 180 is made of rubber such as silicone rubber or polyurethane rubber, or resin such as epoxy resin, and has sound insulation and adhesive properties.

[0049] The retaining member 140 retains the terminal 130. The terminal 130 passes through the retaining member 140. The terminal 130 can be pressed into the retaining member 140, inserted into a through hole formed in the retaining member 140, or the retaining member 140 and the terminal 130 can be integrally molded by insert molding or the like. The retaining member 140 is formed of a resin such as polybutylene terephthalate.

[0050] The retaining member 140 includes a first extension 141, a second extension 142, and a connecting portion 143 that connects the first extension 141 and the second extension 142 to each other. The first extension 141, the connecting portion 143, and the second extension 142 are arranged sequentially in a first direction (Z-axis direction) orthogonal to the bottom 111.

[0051] The first protrusion 141 extends in a second direction (X-axis direction) orthogonal to the first direction (Z-axis direction). The first protrusion 141 has a first surface 141b extending from the periphery of one end of the connecting portion 143 in the first direction (Z-axis direction) and facing the surface 180t of the sealing material 180. In this embodiment, the first protrusion 141 has a cuboid shape. The first surface 141b is a flat surface parallel to the XY plane.

[0052] The first protrusion 141 protrudes from the sealing material 180. In this embodiment, the sealing material 180 is in contact with a portion of the connecting portion 143 in the first surface 141b, and is separate from the portion of the first surface 141b other than that portion. Alternatively, the sealing material 180 may be in contact with the entire surface of the first surface 141b.

[0053] The second extension 142 extends in a third direction (Y-axis direction) orthogonal to both the first direction (Z-axis direction) and the second direction (X-axis direction). The second extension 142 has a second surface 142t extending from the periphery of the other end of the connecting portion 143 in the first direction (Z-axis direction). In this embodiment, the second extension 142 has a cuboid shape. The second surface 142t is a flat surface parallel to the XY plane.

[0054] The second protrusion 142 is embedded in the sealing material 180. The second surface 142t is covered by the sealing material 180.

[0055] The connecting portion 143 extends in the first direction (Z-axis direction). In this embodiment, the connecting portion 143 has a cuboid shape. The connecting portion 143 is embedded in the sealing material 180.

[0056] In this embodiment, when viewed from the first direction (Z-axis direction), the first protrusion 141 and the second protrusion 142 do not overlap with each other except for the area that overlaps with the connecting portion 143.

[0057] Specifically, the maximum extension length of the first surface 141b in the third direction (Y-axis direction) from the periphery of the aforementioned end of the connecting portion 143 is 0. That is, as Figure 4 As shown, the first surface 141b does not extend from the periphery of the aforementioned end of the connecting portion 143 in the third direction (Y-axis direction).

[0058] The maximum extension length in the second direction (X-axis direction) of the second surface 142t from the periphery of the other end of the connecting portion 143 is 0. That is, as Figure 3 As shown, the second surface 142t does not extend from the periphery of the other end of the connecting portion 143 in the second direction (X-axis direction).

[0059] Through the above structure, such as Figure 4 As shown, in the portion of the circumferential surface of the connecting portion 143 facing the third direction (Y-axis direction) and at the corner Cdy of the second surface 142t, assuming that air is entangled and a void V is generated when the sealing material 180 is filled, since the first surface 141b is not located above the corner Cdy, the void V easily disappears from the surface 180t of the sealing material 180, and the residue of the void V under the first surface 141b can be suppressed. As a result, the prolonged reverberation time caused by the void V can be suppressed.

[0060] In this embodiment, the first protrusion 141 has a first surface 141b extending from the periphery of one end of the connecting portion 143 in the first direction (Z-axis direction) and facing the surface 180t of the sealing material 180. Thus, when the sealing material 180 is filled, the sealing material 180 in contact with the first surface 141b expands along the first surface 141b, thereby suppressing the sealing material 180 from climbing up the first protrusion 141.

[0061] Furthermore, since the second surface 142t of the second protrusion 142 is covered by the sealing material 180, it is possible to prevent the retaining member 140 from falling off the sealing material 180.

[0062] The first protrusion 141 and the second protrusion 142 each have a cuboid shape, thereby ensuring that the flat first surface 141b facing the surface 180t of the sealing material 180 is large, thereby effectively suppressing the sealing material 180 from climbing at the first protrusion 141, and making the engagement between the second surface 142t and the sealing material 180 firm, thereby effectively preventing the retaining member 140 from falling off the sealing material 180.

[0063] (Implementation Method 2)

[0064] Hereinafter, an ultrasonic transceiver according to Embodiment 2 of the present invention will be described with reference to the figures. The shape of the holding member of the ultrasonic transceiver according to Embodiment 2 of the present invention is different from that of the ultrasonic transceiver 100 according to Embodiment 1 of the present invention. Therefore, the same structure as that of the ultrasonic transceiver 100 according to Embodiment 1 of the present invention will not be described again.

[0065] Figure 5 This is a perspective view showing the housing and sealing material of the ultrasonic transceiver according to Embodiment 2 of the present invention. Figure 6 Viewed from the direction of arrow VI Figure 5 Front view of an ultrasonic transceiver. Figure 7 Viewed from the direction of arrow VII Figure 5 A side view of an ultrasonic transceiver.

[0066] like Figures 5-7 As shown, the ultrasonic transceiver 200 according to Embodiment 2 of the present invention includes a retaining member 240. The retaining member 240 includes a first extension 241, a second extension 242, and a connecting portion 143 that connects the first extension 241 and the second extension 242 to each other.

[0067] The first protrusion 241 extends in the second direction (X-axis direction). The first protrusion 241 has a first surface 241b extending from the periphery of one end of the connecting portion 143 in the first direction (Z-axis direction) and facing the surface 180t of the sealing material 180. In this embodiment, the first protrusion 241 has a cuboid shape. The first surface 241b is a flat surface parallel to the XY plane.

[0068] The second extension 242 extends in the third direction (Y-axis direction). The second extension 242 has a second surface 242t extending from the periphery of the other end of the connecting portion 143 in the first direction (Z-axis direction). In this embodiment, the second extension 242 has a cuboid shape. The second surface 242t is a flat surface parallel to the XY plane.

[0069] In this embodiment, such as Figure 6As shown, the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 242t from the periphery of the other end of the connecting portion 143 is less than half of the maximum value W1 of the extension length in the second direction (X-axis direction) of the first surface 241b from the periphery of one end of the connecting portion 143.

[0070] like Figure 7 As shown, the maximum value W3 of the extension length in the third direction (Y-axis direction) of the first surface 241b from the periphery of the aforementioned end of the connecting portion 143 is less than half of the maximum value W4 of the extension length in the third direction (Y-axis direction) of the second surface 242t from the periphery of the aforementioned other end of the connecting portion 143.

[0071] Through the above structure, such as Figure 6 As shown, the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 242t is small. Therefore, air is less likely to be entangled when the sealing material 180 is filled in the portion of the circumferential surface of the connecting part 143 facing the second direction (X-axis direction) and at the corner Cdx of the second surface 242t, thereby suppressing the generation of voids. Therefore, it is possible to suppress voids remaining under the first surface 241b located above the corner Cdx.

[0072] In addition, such as Figure 7 As shown, in the portion of the circumferential surface of the connecting portion 143 facing the third direction (Y-axis direction) and at the corner Cdy of the second surface 242t, assuming that air is entangled and a void V is generated when the sealing material 180 is filled, because the area of ​​the first surface 241b located above the corner Cdy is small, the void V easily disappears from the surface 180t of the sealing material 180, and the residue of the void V under the first surface 241b can be suppressed. As a result, the prolonged reverberation time caused by the void V can be suppressed.

[0073] (Implementation Method 3)

[0074] Hereinafter, the ultrasonic transceiver according to Embodiment 3 of the present invention will be described with reference to the figures. The shape of the second protrusion of the ultrasonic transceiver according to Embodiment 3 of the present invention is different from that of the ultrasonic transceiver 200 according to Embodiment 2 of the present invention. Therefore, the same structure as the ultrasonic transceiver 200 according to Embodiment 2 of the present invention will not be described again.

[0075] Figure 8 This is a perspective view showing the housing and sealing material of the ultrasonic transceiver according to Embodiment 3 of the present invention. Figure 9 Viewed from the direction of arrow IX Figure 8 Front view of an ultrasonic transceiver. Figure 10 Viewed from the direction of arrow X Figure 8A side view of an ultrasonic transceiver.

[0076] like Figures 8-10 As shown, the ultrasonic transceiver 300 according to Embodiment 3 of the present invention includes a retaining member 340. The retaining member 340 includes a first extension 241, a second extension 342, and a connecting portion 143 that connects the first extension 241 and the second extension 342 to each other.

[0077] The second extension 342 extends in the third direction (Y-axis direction). The second extension 342 has a second surface 342t extending from the periphery 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 extension 342 has a chamfered portion 342c formed along the edge of the second surface 342t.

[0078] In this embodiment, such as Figure 9 As shown, the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 342t from the periphery of the other end of the connecting portion 143 is less than half of the maximum value W1 of the extension length in the second direction (X-axis direction) of the first surface 241b from the periphery of one end of the connecting portion 143.

[0079] like Figure 10 As shown, the maximum value W3 of the extension length in the third direction (Y-axis direction) of the first surface 241b from the periphery of the aforementioned end of the connecting portion 143 is less than half of the maximum value W4 of the extension length in the third direction (Y-axis direction) of the second surface 342t from the periphery of the aforementioned other end of the connecting portion 143.

[0080] Through the above structure, such as Figure 9 As shown, the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 342t is small. Therefore, air is less likely to be entangled when the sealing material 180 is filled in the portion of the circumferential surface of the connecting part 143 facing the second direction (X-axis direction) and at the corner Cdx of the second surface 342t, thereby suppressing the generation of voids. Therefore, it is possible to suppress voids remaining under the first surface 241b located above the corner Cdx.

[0081] In addition, such as Figure 10 As shown, in the portion of the circumferential surface of the connecting portion 143 facing the third direction (Y-axis direction) and at the corner Cdy of the second surface 342t, assuming that air is entangled and a void V is generated when the sealing material 180 is filled, because the area of ​​the first surface 241b located above the corner Cdy is small, the void V easily disappears from the surface 180t of the sealing material 180, and the residue of the void V under the first surface 241b can be suppressed. As a result, the prolonged reverberation time caused by the void V can be suppressed.

[0082] (Implementation Method 4)

[0083] Hereinafter, the ultrasonic transceiver according to Embodiment 4 of the present invention will be described with reference to the figures. The shape of the first protrusion of the ultrasonic transceiver according to Embodiment 4 of the present invention is different from that of the ultrasonic transceiver 200 according to Embodiment 2 of the present invention. Therefore, the same structure as the ultrasonic transceiver 200 according to Embodiment 2 of the present invention will not be described again.

[0084] Figure 11 This is a top view of the holding member of the ultrasonic transceiver according to Embodiment 4 of the present invention, viewed from the first direction. Figure 12 Viewed from the direction of arrow XII Figure 11 Front view of an ultrasonic transceiver. Figure 13 Viewed from the direction of arrow XIII Figure 11 A side view of an ultrasonic transceiver.

[0085] like Figures 11-13 As shown, the ultrasonic transceiver 400 according to Embodiment 4 of the present invention includes a retaining member 440. The retaining member 440 includes a first extension 441, a second extension 242, and a connecting portion 143 that connects the first extension 441 and the second extension 242 to each other.

[0086] The first protrusion 441 extends in the second direction (X-axis direction). The first protrusion 441 has a first surface 441b extending from the periphery of one end of the connecting portion 143 in the first direction (Z-axis direction) and facing the surface 180t of the sealing material 180. The first surface 441b is a flat surface parallel to the XY plane. The first protrusion 441 has a chamfered portion 441c formed along the edge of the first surface 441b.

[0087] In this embodiment, such as Figure 12 As shown, the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 242t from the periphery of the other end of the connecting portion 143 is less than half of the maximum value W1 of the extension length in the second direction (X-axis direction) of the first surface 441b from the periphery of one end of the connecting portion 143.

[0088] like Figure 13 As shown, the maximum value W3 of the extension length in the third direction (Y-axis direction) of the first surface 441b from the periphery of the aforementioned end of the connecting portion 143 is less than half of the maximum value W4 of the extension length in the third direction (Y-axis direction) of the second surface 242t from the periphery of the aforementioned other end of the connecting portion 143.

[0089] Through the above structure, such as Figure 12As shown, the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 242t is small. Therefore, air is less likely to be entangled when the sealing material 180 is filled in the portion of the circumferential surface of the connecting part 143 facing the second direction (X-axis direction) and at the corner Cdx of the second surface 242t, thereby suppressing the generation of voids. Therefore, it is possible to suppress voids remaining under the first surface 441b located above the corner Cdx.

[0090] In addition, such as Figure 13 As shown, in the portion of the circumferential surface of the connecting portion 143 facing the third direction (Y-axis direction) and at the corner Cdy of the second surface 242t, assuming that air is entangled and voids are generated when the sealing material 180 is filled, because the area of ​​the first surface 441b located above the corner Cdy is small, the voids easily disappear from the surface 180t of the sealing material 180, and the voids remaining under the first surface 441b can be suppressed. As a result, the prolonged reverberation time caused by the voids can be suppressed.

[0091] (Implementation Method 5)

[0092] Hereinafter, the ultrasonic transceiver according to Embodiment 5 of the present invention will be described with reference to the figures. The shape of the holding member of the ultrasonic transceiver according to Embodiment 5 of the present invention is different from that of the ultrasonic transceiver 200 according to Embodiment 2 of the present invention. Therefore, the same structure as the ultrasonic transceiver 200 according to Embodiment 2 of the present invention will not be described again.

[0093] Figure 14 This is a top view of the holding member of the ultrasonic transceiver according to Embodiment 5 of the present invention, viewed from the first direction. Figure 15 Viewed from the direction of arrow XV Figure 14 Front view of an ultrasonic transceiver. Figure 16 Viewed from the direction of arrow XVI Figure 14 A side view of an ultrasonic transceiver.

[0094] like Figures 14-16 As shown, the ultrasonic transceiver 500 according to Embodiment 5 of the present invention includes a retaining member 540. The retaining member 540 includes a first extension 541, a second extension 542, and a connecting portion 143 that connects the first extension 541 and the second extension 542 to each other.

[0095] The first protrusion 541 extends in the second direction (X-axis direction). The first protrusion 541 has a first surface 541b extending from the periphery of one end of the connecting portion 143 in the first direction (Z-axis direction) and facing the surface 180t of the sealing material 180. In this embodiment, the first protrusion 541 has a generally cuboid shape, and when viewed from the first direction (Z-axis direction), chamfered portions 541c are formed at the four corners. The first surface 541b is a flat surface parallel to the XY plane.

[0096] The second protrusion 542 extends in the third direction (Y-axis direction). The second protrusion 542 has a second surface 542t extending from the periphery of the other end of the connecting portion 143 in the first direction (Z-axis direction). In this embodiment, the second protrusion 542 has a generally cuboid shape, and when viewed from the first direction (Z-axis direction), chamfered portions 542c are formed at its four corners. The second surface 542t is a flat surface parallel to the XY plane.

[0097] In this embodiment, such as Figure 15 As shown, the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 542t from the periphery of the other end of the connecting portion 143 is less 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 periphery of one end of the connecting portion 143.

[0098] like Figure 16 As shown, the maximum value W3 of the extension length in the third direction (Y-axis direction) of the first surface 541b from the periphery of the aforementioned end of the connecting portion 143 is less than half of the maximum value W4 of the extension length in the third direction (Y-axis direction) of the second surface 542t from the periphery of the aforementioned other end of the connecting portion 143.

[0099] Through the above structure, such as Figure 15 As shown, the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 542t is small. Therefore, air is less likely to be entangled when the sealing material 180 is filled in the portion of the circumferential surface of the connecting part 143 facing the second direction (X-axis direction) and at the corner Cdx of the second surface 542t, thereby suppressing the generation of voids. Therefore, it is possible to suppress voids remaining under the first surface 541b located above the corner Cdx.

[0100] In addition, such as Figure 16As shown, in the portion of the circumferential surface of the connecting portion 143 facing the third direction (Y-axis direction) and at the corner Cdy of the second surface 542t, assuming that air is entangled and a gap is generated when the sealing material 180 is filled, because the area of ​​the first surface 541b located above the corner Cdy is small, the gap easily disappears from the surface 180t of the sealing material 180, and the gap residue under the first surface 541b can be suppressed. As a result, the long reverberation time caused by the gap can be suppressed.

[0101] (Implementation Method 6)

[0102] Hereinafter, an ultrasonic transceiver according to Embodiment 6 of the present invention will be described with reference to the figures. The shape of the holding member of the ultrasonic transceiver according to Embodiment 6 of the present invention is different from that of the ultrasonic transceiver 200 according to Embodiment 2 of the present invention. Therefore, the same structure as the ultrasonic transceiver 200 according to Embodiment 2 of the present invention will not be described again.

[0103] Figure 17 This is a top view of the holding member of the ultrasonic transceiver according to Embodiment 6 of the present invention, viewed from the first direction. Figure 18 Viewed from the direction of arrow XVIII Figure 17 Front view of an ultrasonic transceiver. Figure 19 Viewed from the direction of arrow XIX Figure 17 A side view of an ultrasonic transceiver.

[0104] like Figures 17-19 As shown, the ultrasonic transceiver 600 according to Embodiment 6 of the present invention includes a retaining member 640. The retaining member 640 includes a first extension 641, a second extension 642, and a connecting portion 143 that connects the first extension 641 and the second extension 642 to each other.

[0105] The first protrusion 641 extends in the second direction (X-axis direction). The first protrusion 641 has a first surface 641b extending from the periphery of one end of the connecting portion 143 in the first direction (Z-axis direction) and facing the surface 180t of the sealing material 180. In this embodiment, the first protrusion 641 has an elongated cylindrical shape, which is elongated oval when viewed from the first direction (Z-axis direction). The first surface 641b is a flat surface parallel to the XY plane.

[0106] The second protrusion 642 extends in the third direction (Y-axis direction). The second protrusion 642 has a second surface 642t extending from the periphery of the other end of the connecting portion 143 in the first direction (Z-axis direction). In this embodiment, the second protrusion 642 has an elongated cylindrical shape, which is oblong when viewed from the first direction (Z-axis direction). The second surface 642t is a flat surface parallel to the XY plane.

[0107] In this embodiment, such as Figure 18 As shown, the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 642t from the periphery of the other end of the connecting portion 143 is less than half of the maximum value W1 of the extension length in the second direction (X-axis direction) of the first surface 641b from the periphery of one end of the connecting portion 143.

[0108] like Figure 19 As shown, the maximum value W3 of the extension length in the third direction (Y-axis direction) of the first surface 641b from the periphery of the aforementioned end of the connecting portion 143 is less than half of the maximum value W4 of the extension length in the third direction (Y-axis direction) of the second surface 642t from the periphery of the aforementioned other end of the connecting portion 143.

[0109] Through the above structure, such as Figure 18 As shown, the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 642t is small. Therefore, air is less likely to be entangled when the sealing material 180 is filled in the portion of the circumferential surface of the connecting part 143 facing the second direction (X-axis direction) and at the corner Cdx of the second surface 642t, thereby suppressing the generation of voids. Therefore, it is possible to suppress voids remaining under the first surface 641b located above the corner Cdx.

[0110] In addition, such as Figure 19 As shown, in the portion of the circumferential surface of the connecting portion 143 facing the third direction (Y-axis direction) and at the corner Cdy of the second surface 642t, assuming that air is entangled and a gap is generated when the sealing material 180 is filled, because the area of ​​the first surface 641b located above the corner Cdy is small, the gap easily disappears from the surface 180t of the sealing material 180, and the gap residue under the first surface 641b can be suppressed. As a result, the long reverberation time caused by the gap can be suppressed.

[0111] (Implementation Method 7)

[0112] Hereinafter, an ultrasonic transceiver according to Embodiment 7 of the present invention will be described with reference to the figures. The shape of the holding member of the ultrasonic transceiver according to Embodiment 7 of the present invention is different from that of the ultrasonic transceiver 200 according to Embodiment 2 of the present invention. Therefore, the same structure as the ultrasonic transceiver 200 according to Embodiment 2 of the present invention will not be described again.

[0113] Figure 20 This is a top view of the holding member of the ultrasonic transceiver according to Embodiment 7 of the present invention, viewed from the first direction. Figure 21 Observing from the direction of arrow XXI Figure 20 Front view of an ultrasonic transceiver. Figure 22Observing from the direction of arrow XXII Figure 20 A side view of an ultrasonic transceiver.

[0114] like Figures 20-22 As shown, the ultrasonic transceiver 700 according to Embodiment 7 of the present invention includes a retaining member 740. The retaining member 740 includes a first extension 741, a second extension 742, and a connecting portion 143 that connects the first extension 741 and the second extension 742 to each other.

[0115] The first protrusion 741 extends in the second direction (X-axis direction). The first protrusion 741 has a first surface 741b extending from the periphery of one end of the connecting portion 143 in the first direction (Z-axis direction) and facing the surface 180t of the sealing material 180. In this embodiment, the first protrusion 741 has a cylindrical shape and a circular shape when viewed from the second direction (X-axis direction). The first surface 741b is a curved surface.

[0116] The second protrusion 742 extends in the third direction (Y-axis direction). The second protrusion 742 has a second surface 742t extending from the periphery of the other end of the connecting portion 143 in the first direction (Z-axis direction). In this embodiment, the second protrusion 742 has a cylindrical shape and a circular shape when viewed from the third direction (Y-axis direction). The second surface 742t is a curved surface.

[0117] In this embodiment, such as Figure 21 As shown, the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 742t from the periphery of the other end of the connecting portion 143 is less than half of the maximum value W1 of the extension length in the second direction (X-axis direction) of the first surface 741b from the periphery of one end of the connecting portion 143.

[0118] like Figure 22 As shown, the maximum value W3 of the extension length in the third direction (Y-axis direction) of the first surface 741b from the periphery of the aforementioned end of the connecting portion 143 is less than half of the maximum value W4 of the extension length in the third direction (Y-axis direction) of the second surface 742t from the periphery of the aforementioned other end of the connecting portion 143.

[0119] Through the above structure, such as Figure 21 As shown, the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 742t is small. Therefore, air is less likely to be entangled when the sealing material 180 is filled in the portion of the circumferential surface of the connecting part 143 facing the second direction (X-axis direction) and at the corner Cdx of the second surface 742t, thereby suppressing the generation of voids. Therefore, it is possible to suppress voids remaining under the first surface 741b located above the corner Cdx.

[0120] In addition, such as Figure 22 As shown, in the portion of the circumferential surface of the connecting portion 143 facing the third direction (Y-axis direction) and at the corner Cdy of the second surface 742t, assuming that air is entangled and a gap is generated when the sealing material 180 is filled, because the area of ​​the first surface 741b located above the corner Cdy is small, the gap easily disappears from the surface 180t of the sealing material 180, and the gap residue under the first surface 741b can be suppressed. As a result, the long reverberation time caused by the gap can be suppressed.

[0121] In this embodiment, the first protrusion 741 and the second protrusion 742 each have a cylindrical shape, so that the first surface 741b and the second surface 742t are each curved surfaces, thereby effectively suppressing the generation of voids at the corner Cdx and effectively suppressing voids remaining under the first surface 741b.

[0122] (Implementation Method 8)

[0123] Hereinafter, an ultrasonic transceiver according to Embodiment 8 of the present invention will be described with reference to the figures. The shape of the holding member of the ultrasonic transceiver according to Embodiment 8 of the present invention is different from that of the ultrasonic transceiver 200 according to Embodiment 2 of the present invention. Therefore, the same structure as that of the ultrasonic transceiver 200 according to Embodiment 2 of the present invention will not be described again.

[0124] Figure 23 This is a top view of the holding member of the ultrasonic transceiver according to Embodiment 8 of the present invention, viewed from the first direction. Figure 24 Observing from the direction of arrow XXIV Figure 23 Front view of an ultrasonic transceiver. Figure 25 Observing from the direction of arrow XXV Figure 23 A side view of an ultrasonic transceiver.

[0125] like Figures 23-25 As shown, the ultrasonic transceiver 800 according to Embodiment 8 of the present invention includes a retaining member 840. The retaining member 840 includes a first extension 841, a second extension 842, and a connecting portion 143 that connects the first extension 841 and the second extension 842 to each other.

[0126] The first protrusion 841 extends in the second direction (X-axis direction). The first protrusion 841 has a first surface 841b extending from the periphery of one end of the connecting portion 143 in the first direction (Z-axis direction) and facing the surface 180t of the sealing material 180. In this embodiment, the first protrusion 841 has a trapezoidal column shape, which is trapezoidal when viewed from the second direction (X-axis direction). The first surface 841b is a flat surface parallel to the XY plane. The first protrusion 841 has inclined surfaces 841c on both sides in the third direction (Y-axis direction) that move closer to each other as they move away from the first surface 841b in the first direction (Z-axis direction).

[0127] The second protrusion 842 extends in the third direction (Y-axis direction). The second protrusion 842 has a second surface 842t extending from the periphery of the other end of the connecting portion 143 in the first direction (Z-axis direction). In this embodiment, the second protrusion 842 has a trapezoidal column shape, which is trapezoidal when viewed from the third direction (Y-axis direction). The second surface 842t is a flat surface parallel to the XY plane. The second protrusion 842 has inclined surfaces 842c on both sides in the second direction (X-axis direction) that separate from each other as they move away from the second surface 842t in the first direction (Z-axis direction).

[0128] In this embodiment, such as Figure 24 As shown, the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 842t from the periphery of the other end of the connecting portion 143 is less than half of the maximum value W1 of the extension length in the second direction (X-axis direction) of the first surface 841b from the periphery of one end of the connecting portion 143.

[0129] like Figure 25 As shown, the maximum value W3 of the extension length in the third direction (Y-axis direction) of the first surface 841b from the periphery of the aforementioned end of the connecting portion 143 is less than half of the maximum value W4 of the extension length in the third direction (Y-axis direction) of the second surface 842t from the periphery of the aforementioned other end of the connecting portion 143.

[0130] Through the above structure, such as Figure 24 As shown, the maximum value W2 of the extension length in the second direction (X-axis direction) of the second surface 842t is small. Therefore, air is less likely to be entangled when the sealing material 180 is filled in the portion of the circumferential surface of the connecting part 143 facing the second direction (X-axis direction) and at the corner Cdx of the second surface 842t, thereby suppressing the generation of voids. Therefore, it is possible to suppress voids remaining under the first surface 841b located above the corner Cdx.

[0131] In addition, such as Figure 25As shown, in the portion of the circumferential surface of the connecting portion 143 facing the third direction (Y-axis direction) and at the corner Cdy of the second surface 842t, assuming that air is entangled and a gap is generated when the sealing material 180 is filled, because the area of ​​the first surface 841b located above the corner Cdy is small, the gap easily disappears from the surface 180t of the sealing material 180, and the gap residue under the first surface 841b can be suppressed. As a result, the long reverberation time caused by the gap can be suppressed.

[0132] In the above description of the embodiments, the combinable structures can also be combined with each other.

[0133] The embodiments disclosed herein are illustrative in all respects and not restrictive. The scope of the invention is set forth not by the foregoing description but by the claims, and is intended to include all modifications equivalent to and within the scope of the claims.

[0134] Explanation of reference numerals in the attached figures

[0135] 100, 200, 300, 400, 500, 600, 700, 800: Ultrasonic transceivers;

[0136] 110: Shell;

[0137] 111: Bottom;

[0138] 112: Side wall portion;

[0139] 120: Piezoelectric element;

[0140] 130: terminal;

[0141] 140, 240, 340, 440, 540, 640, 740, 840: retaining components;

[0142] 141, 241, 441, 541, 641, 741, 841: First protruding part;

[0143] 141b, 241b, 441b, 541b, 641b, 741b, 841b: Page 1;

[0144] 142, 242, 342, 542, 642, 742, 842: Second protrusion;

[0145] 142t, 242t, 342t, 542t, 642t, 742t, 842t: Page 2;

[0146] 143: Connecting part;

[0147] 150: Wiring components;

[0148] 160: Bonding material;

[0149] 170: Sound-absorbing materials;

[0150] 180: Sealing material;

[0151] 180t: Surface;

[0152] 342c, 441c, 541c, 542c: Chamfered parts;

[0153] 841c, 842c: inclined plane;

[0154] Cdx, Cdy: Corner;

[0155] V: Gap.

Claims

1. An ultrasonic transceiver, comprising: A bottomed cylindrical shell, having a bottom and sidewalls; A piezoelectric element is disposed on the bottom inside the housing; The terminals are electrically connected to the piezoelectric element via wiring components on the inner side of the housing and are led out to the outer side of the housing; Retaining member, retaining the terminal; and Sealing material is filled into the housing. The retaining member includes a first protrusion, a second protrusion, and a connecting portion that connects the first protrusion and the second protrusion to each other. The first protrusion, the connecting portion, and the second protrusion are arranged sequentially in a first direction orthogonal to the bottom. The first protrusion protrudes from the sealing material, and the connecting portion and the second protrusion are embedded in the sealing material. The first protrusion extends in a second direction orthogonal to the first direction, and has a first surface extending from the periphery of one end of the connecting portion in the first direction and facing the sealing material. The second protrusion extends in a third direction orthogonal to both the first and second directions, and has a second surface extending from the periphery of the other end of the connecting portion in the first direction. The maximum extension length from the periphery of the other end of the connecting portion in the second direction of the second surface is less than half the maximum extension length from the periphery of one end of the connecting portion in the second direction of the first surface. The maximum extension length from the periphery of one end of the connecting portion in the third direction of the first surface is less than half the maximum extension length from the periphery of the other end of the connecting portion in the third direction of the second surface.

2. The ultrasonic transceiver according to claim 1, wherein, The maximum extension length of the first surface in the third direction from the periphery of one end of the connecting portion is 0. The maximum extension length of the second surface in the second direction from the periphery of the other end of the connecting portion is 0.

3. The ultrasonic transceiver according to claim 1 or claim 2, wherein, The first protrusion and the second protrusion each have a cuboid shape.

4. The ultrasonic transceiver according to claim 3, wherein, The second protrusion has a chamfered portion formed along the edge of the second surface.

5. The ultrasonic transceiver according to claim 1 or claim 2, wherein, The first protrusion and the second protrusion each have a cylindrical shape.

Images