JP6972713B2 - Ultrasonic sensor - Google Patents

Description

The present invention relates to an ultrasonic sensor.

Conventionally, an ultrasonic sensor in which an ultrasonic vibrator and a circuit board are housed in a case and a plurality of connection pins of the ultrasonic vibrator and a circuit board are electrically connected is known (see, for example, Patent Document 1). ).

Japanese Patent No. 4438667

However, conventional ultrasonic sensors have a problem that when an ultrasonic sensor is assembled, the connection pin of the ultrasonic transducer is displaced, which makes it difficult to assemble the ultrasonic sensor. Therefore, in this type of ultrasonic sensor, it is meaningful if, for example, a new configuration that is easy to assemble can be obtained.

The ultrasonic sensor according to the embodiment of the present invention includes, for example, a support, a piezoelectric element supported by the support, and a plurality of ultrasonic sensors that are electrically connected to the piezoelectric element and project in the first direction from the support. An ultrasonic transducer having a connection pin, a circuit board arranged in the first direction of the support and electrically connected to the plurality of connection pins, and the ultrasonic transducer and the circuit board. A housing case and an inserted portion provided between the support and the circuit board and provided with an opening into which the connection pin is inserted are provided, and the opening is provided in the first direction. It includes a tapered portion whose diameter decreases toward the end, and is provided for each connection pin.

According to such a configuration, for example, since an opening of an inserted portion is provided for each connection pin, it is easy to position each connection pin when assembling an ultrasonic sensor. Therefore, it is easy to assemble an ultrasonic sensor. According to such a configuration, for example, since the opening of the inserted portion includes a tapered portion whose diameter decreases toward the first direction, the connection pin is used as the opening when assembling the ultrasonic sensor. Easy to put in. Therefore, it is easy to assemble an ultrasonic sensor.

The ultrasonic sensor according to the embodiment of the present invention includes, for example, a support, a piezoelectric element supported by the support, and a plurality of ultrasonic sensors that are electrically connected to the piezoelectric element and project in the first direction from the support. An ultrasonic transducer having a connection pin, a circuit board arranged in the first direction of the support and electrically connected to the plurality of connection pins, and the ultrasonic transducer and the circuit board. A housing case and an inserted portion provided between the support and the circuit board and provided with an opening into which the connection pin is inserted are provided, and the opening is provided in the first direction. It contains a tapered portion whose diameter becomes smaller as it goes toward it.

According to such a configuration, for example, since the opening of the inserted portion includes a tapered portion whose diameter decreases toward the first direction, the connection pin is used as the opening when assembling the ultrasonic sensor. Easy to put in. Therefore, it is easy to assemble an ultrasonic sensor.

Further, in the ultrasonic sensor, for example, the inserted portion is provided in the case.

According to such a configuration, for example, since the inserted portion is provided in the case, it is possible to prevent the members other than the case from becoming complicated.

Further, in the ultrasonic sensor, for example, the inserted portion is fixed to the circuit board.

According to such a configuration, for example, since the inserted portion is fixed to the circuit board, it is possible to prevent the members other than the circuit board from becoming complicated.

FIG. 1 is a schematic and exemplary plan view of an ultrasonic sensor according to a first embodiment. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 is a sectional view taken along line III-III of FIG. FIG. 4 is a schematic and exemplary plan view of an ultrasonic transducer in the ultrasonic sensor of the first embodiment. FIG. 5 is a cross-sectional view taken along the line VV of FIG. FIG. 6 is a schematic and exemplary plan view of a case of an ultrasonic sensor according to a first embodiment. FIG. 7 is a schematic and exemplary bottom view of a case of an ultrasonic sensor according to a first embodiment. FIG. 8 is an enlarged view of the periphery of the connection pin of the ultrasonic transducer in FIG. FIG. 9 is a schematic and exemplary cross-sectional view of the ultrasonic sensor of the second embodiment, showing a cross-sectional view corresponding to FIG. FIG. 10 is an enlarged view of the periphery of the connection pin of the ultrasonic transducer in FIG.

Hereinafter, embodiments will be described with reference to the drawings. It should be noted that the following exemplary embodiments include similar components. Therefore, in the following, similar components are designated by a common reference numeral, and duplicate explanations are omitted.

Further, in each of the following figures, the X-axis, the Y-axis, and the Z-axis are defined for convenience. The X-axis, Y-axis, and Z-axis are orthogonal to each other. Further, in the present specification, the ordinal numbers are given for convenience in order to distinguish members (parts), parts, etc., and do not indicate the priority order or the order.

In addition, the configuration (technical features) of the embodiments shown below, and the actions and effects brought about by the configuration are merely examples. The present invention can be realized by a configuration other than the configurations disclosed in the following embodiments, and at least one of various effects obtained by the basic configuration can be obtained.

<First Embodiment>
FIG. 1 is a schematic and exemplary plan view of the ultrasonic sensor 1 of the present embodiment. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 is a sectional view taken along line III-III of FIG. As shown in FIGS. 1 to 3, the ultrasonic sensor 1 includes a case 2, an ultrasonic vibrator 3, a circuit board 4, and a connector 5. The ultrasonic vibrator 3 and the circuit board 4 are housed in the case 2 and are electrically connected to each other. The connector 5 is integrally provided in the case 2 and is electrically connected to the circuit board 4.

FIG. 4 is a schematic and exemplary plan view of the ultrasonic vibrator 3 in the ultrasonic sensor 1 of the present embodiment. FIG. 5 is a cross-sectional view taken along the line VV of FIG. As shown in FIGS. 4 and 5, the ultrasonic transducer 3 has a support 11, a piezoelectric element 12, and two connecting pins 13.

The support 11 supports the piezoelectric element 12 and the connection pin 13. The support 11 is composed of a combination of a plurality of members. Specifically, the support 11 includes a housing 14, a sealing member 15, and a protective member 16.

The housing 14 is provided with a storage chamber 14a that houses storage parts such as the piezoelectric element 12. The housing 14 has a wall 14b and a tubular portion 14c, each facing a containment chamber 14a. That is, the accommodation chamber 14a is surrounded by the wall 14b and the tubular portion 14c. The wall 14b is formed in a disk shape centered on the central axis Ax, and extends in a direction intersecting the central axis Ax. The central axis Ax is, for example, along the Z axis. The tubular portion 14c is formed in a cylindrical shape around the central axis Ax, and extends in the first direction D1 from the outer peripheral portion of the wall 14b. The first direction D1 is along the central axes Ax and Z. The accommodation chamber 14a surrounded by the wall 14b and the tubular portion 14c is formed in a concave shape recessed from the end portion of the tubular portion 14c in the second direction D2 opposite to the first direction D1 toward the wall 14b.

At least the surface of the housing 14 is made of a conductive material. The housing 14 may be entirely made of a conductive material, or the surface may be made of a conductive material and the inside may be made of an insulating material. The conductive material is a metal material such as aluminum.

As shown in FIG. 5, the sealing member 15 is filled in the accommodating chamber 14a in which the accommodating parts such as the piezoelectric element 12 are accommodated. That is, the accommodating parts such as the piezoelectric element 12 are sealed by the sealing member 15. The sealing member 15 is made of an insulating and elastic material such as silicon. The sealing member 15 together with the housing 14 constitutes a cylindrical member 17 centered on the central axis Ax.

As shown in FIGS. 4 and 5, the protective member 16 projects from the end of the cylindrical member 17 in the first direction D1 in the first direction D1. The protective member 16 is configured as a square columnar whose center is deviated from the central axis Ax of the columnar member 17 (cylindrical portion 14c). The protective member 16 is fixed to the cylindrical member 17. A part of the protective member 16 may be embedded in the sealing member 15. The protective member 16 is made of an insulating material.

As shown in FIG. 5, the piezoelectric element 12 is adhered to the inner surface of the wall 14b of the housing 14 with a conductive adhesive or the like. The outer surface of the wall 14b to which the piezoelectric element 12 is adhered constitutes the vibration surface 14d. The piezoelectric element 12 has a configuration in which electrodes are provided on both sides of the piezoelectric ceramics. That is, the piezoelectric element 12 has a pair of electrodes. One electrode of the piezoelectric element 12 is electrically connected to one of the two connecting pins 13 via a first lead (not shown). The other electrode of the piezoelectric element 12 is electrically connected to the other of the two connecting pins 13 via a housing 14 and a second lead (not shown). The first lead and the second lead are housed in the storage chamber 14a and sealed by the sealing member 15. The first lead and the second lead are accommodating members accommodated in the accommodating chamber 14a.

As shown in FIGS. 4 and 5, the two connecting pins 13 project from the protective member 16 of the support 11 in the first direction D1. The two connecting pins 13 are provided substantially parallel to each other with a distance from each other in a direction (Y direction) orthogonal to the first direction D1. The intermediate position P1 (FIG. 4) of the two connecting pins 13 in the direction orthogonal to the axial direction of the central axis Ax is deviated from the central axis Ax. A part of each connection pin 13 penetrates the protective member 16, and the base end portion (not shown) which is the end portion of the connection pin 13 in the second direction D2 is sealed by the sealing member 15. .. That is, a part including the base end portion of the connecting pin 13 is covered with the protective member 16 and the sealing member 15. The connecting pin 13 is integrated with the protective member 16 by insert molding or assembly. The tip portion 13a, which is the end portion of the connection pin 13 in the first direction D1, is located outside the support 11. The tip portion 13a of the connection pin 13 is electrically connected to the circuit board 4. The connecting pin 13 is made of a conductive material such as copper. The connection pin 13 is also referred to as a terminal pin or a pin.

As shown in FIGS. 2 and 3, an elastic member 22 is attached to the ultrasonic vibrator 3. The elastic member 22 has a wall 22a, a tubular portion 22b, and a hooking portion 22c. The wall 22a is formed in the shape of a disk covering the end portion of the support 11 in the first direction D1. Further, the wall 22a is provided with a hole 22d into which the protective member 16 of the support 11 is inserted, and the protective member 16 and the connection pin 13 project to the outside of the elastic member 22. The tubular portion 22b is formed in a cylindrical shape that covers the outer peripheral surface of the tubular portion 14c of the ultrasonic vibrator 3, and is connected to the outer peripheral portion of the wall 22a. The hooking portion 22c is provided at the end of the tubular portion 22b in the second direction D2. The hook portion 22c projects outward in the radial direction of the tubular portion 22b. The hook portion 22c is formed in an annular shape. The elastic member 22 is made of, for example, silicon rubber.

As shown in FIGS. 2 and 3, the circuit board 4 is arranged in the case 2 in the first direction D1 of the support 11 of the ultrasonic vibrator 3. The circuit board 4 is fixed to a fixing portion (not shown) provided in the case 2. The circuit board 4 extends in a direction intersecting the first direction D1. The circuit board 4 has one side 4a, another side 4b, and an electronic component (not shown). One side 4a faces the first direction D1. The other surface 4b is a surface opposite to the one surface 4a and faces the second direction D2. The electronic component is mounted on at least one of the one side 4a and the other side 4b. Further, the circuit board 4 is provided with two through holes 4c. The through hole 4c penetrates the circuit board 4 in the first direction D1 and is open to one surface 4a and the other surface 4b. With the tip 13a of the connection pin 13 inserted in each of the two through holes 4c, the tip 13a and the pattern (not shown) on the circuit board 4 are electrically connected by a connection (not shown) such as solder. It is connected to the.

The circuit board 4 applies a voltage for generating ultrasonic waves to the ultrasonic vibrator 3. As a result, in the ultrasonic vibrator 3, the piezoelectric element 12 is excited, and the vibration surface 14d vibrates together with the piezoelectric element 12, so that ultrasonic waves are emitted. The piezoelectric element 12 vibrates due to the ultrasonic waves reflected by the object and returned to the ultrasonic transducer 3, so that an electric signal (voltage) is input from the piezoelectric element 12 to the circuit board 4. The circuit board 4 can calculate the distance between the ultrasonic transducer 3 and the object based on the time from the application of the voltage to the input of the electric signal.

As shown in FIG. 2, the connector 5 has a connector housing 18 and a plurality of connector terminals 19. Note that FIG. 2 shows one of the plurality of connector terminals 19. The connector housing 18 is integrally molded with the case 2 and constitutes a part of the case 2. The connector terminal 19 is integrally molded with the case 2 by insert molding. The connector terminal 19 is electrically connected to the circuit board 4. The connector terminal 19 is also referred to as an external output terminal.

FIG. 6 is a schematic and exemplary plan view of a case 2 in the ultrasonic sensor 1 of the present embodiment. FIG. 7 is a schematic and exemplary bottom view of the case 2 of the ultrasonic sensor 1 of the present embodiment. As shown in FIGS. 2, 3, 6 and 7, in the case 2, the vibrator accommodating chamber 2a accommodating the ultrasonic oscillator 3 and the elastic member 22 and the substrate accommodating chamber 2b accommodating the circuit board 4 are provided. It is provided. A part of the connection pin 13 extends to the substrate accommodating chamber 2b. The substrate accommodating chamber 2b is arranged in the first direction D1 of the oscillator accommodating chamber 2a. The oscillator accommodating chamber 2a and the substrate accommodating chamber 2b are overlapped with each other in the first direction D1 and communicate with each other. The oscillator accommodating chamber 2a is open in the second direction D2, and the substrate accommodating chamber 2b is open in the first direction D1. The oscillator accommodating chamber 2a and the substrate accommodating chamber 2b are also referred to as accommodating chambers.

The case 2 has a wall 2c, a first tubular portion 2d, and a second tubular portion 2e. Case 2 is made of a synthetic resin material.

The wall 2c is formed in a rectangular plate shape and extends in a direction (XY plane) intersecting the first direction D1. A part of the wall 2c is arranged between the support 11 of the ultrasonic transducer 3 and the circuit board 4.

The first tubular portion 2d is arranged close to one of both ends in the longitudinal direction of the wall 2c, and protrudes from the wall 2c in the second direction D2. The first tubular portion 2d is formed in a cylindrical shape around the central axis Ax of the tubular portion 14c in the housing 14. Specifically, the first tubular portion 2d is formed in a cylindrical shape centered on the central axis Ax. That is, the central axis Ax is not only the central axis of the tubular portion 14c but also the central axis of the first tubular portion 2d. The end of the first tubular portion 2d in the second direction D2 is open in the second direction D2. An oscillator accommodating chamber 2a is provided inside the first cylinder portion 2d. That is, the first cylinder portion 2d surrounds the oscillator accommodating chamber 2a. A positioning portion 2k is provided on the inner surface of the intermediate portion of the first cylinder portion 2d in the first direction D1. The positioning unit 2k faces the second direction D2. The positioning portion 2k is formed in an annular shape around the central axis Ax.

The second tubular portion 2e extends in the first direction D1 from the outer peripheral portion of the wall 2c. The second cylindrical portion 2e is configured in a square cylindrical shape. A substrate accommodating chamber 2b is provided inside the second cylinder portion 2e. That is, the second cylinder portion 2e surrounds the substrate accommodating chamber 2b.

Further, as shown in FIGS. 2, 6 and 7, the wall 2c is provided with a communication hole 2f that connects the oscillator accommodating chamber 2a and the substrate accommodating chamber 2b. In this embodiment, two (plural) communication holes 2f are provided in the wall 2c. The communication hole 2f penetrates the wall 2c in the thickness direction (first direction D1) of the wall 2c. The two communication holes 2f are provided so as to be spaced apart from each other in the longitudinal direction (X direction) of the wall 2c. In other words, the communication portion 2h including the two communication holes 2f is divided into two portions (communication holes 2f) by the partition portion 2g provided on the wall 2c. The partition portion 2g is located between the oscillator accommodating chamber 2a and the substrate accommodating chamber 2b. That is, the partition portion 2g (a part of the wall 2c) is provided in the case 2. The two communication holes 2f are arranged between the support 11 of the ultrasonic transducer 3 and the circuit board 4. In the present embodiment, as an example, the shapes of the two communication holes 2f are different from each other, but the shapes of the two communication holes 2f may be the same. The communication portion 2h is also referred to as an opening portion, and the partition portion 2g is also referred to as a cross-linking portion.

FIG. 8 is an enlarged view of the periphery of the connection pin 13 of the ultrasonic transducer 3 in FIG. As shown in FIGS. 6, 7 and 8, the wall 2c is provided with an opening 20 for each connection pin 13 of the ultrasonic transducer 3. That is, the wall 2c is provided with two openings 20. Specifically, the two openings 20 are provided in the partition portion 2g. The opening 20 is arranged between the support 11 of the ultrasonic transducer 3 and the circuit board 4. The opening 20 is configured as a through hole penetrating the wall 2c in the thickness direction (first direction D1) of the wall 2c. As shown in FIGS. 6 and 7, the intermediate position P2 of the two openings 20 in the direction orthogonal to the axial direction of the central axis Ax is deviated from the central axis Ax. Further, when viewed from the axial direction of the central axis Ax, the intermediate position P2 overlaps with the intermediate position P1 of the two connecting pins 13.

As shown in FIG. 8, the opening 20 includes a tapered portion 20a and a linear portion 20b. The tapered portion 20a is open to the surface of the wall 2c in the second direction D2. The diameter of the tapered portion 20a becomes smaller toward the circuit board 4 side from the support 11 side, that is, toward the first direction D1. The linear portion 20b extends linearly from the end of the tapered portion 20a in the first direction D1 toward the first direction D1 and opens to the surface of the wall 2c in the second direction D2. The diameter of the linear portion 20b is substantially constant. The diameter of the opening end portion 20c in the second direction D2 of the opening portion 20 is, for example, equal to or larger than the diameter of the through hole 4c of the circuit board 4, and FIG. 8 and the like show an example in which the diameter is larger than the diameter of the circuit board 4. There is. Further, the diameter of the opening end portion 20d on the circuit board 4 side of the opening 20 is equal to or smaller than the diameter of the through hole 4c of the circuit board 4, and FIG. 8 and the like show an example in which the diameter is smaller than the diameter of the circuit board 4. There is. A portion of the connection pin 13 of the ultrasonic transducer 3 between the support 11 and the circuit board 4 is inserted into each opening 20. The tapered portion 20a and the linear portion 20b are also referred to as portions.

Further, as shown in FIG. 8, the wall 2c has an enclosure surface 21 facing the opening 20 for each opening 20. That is, each opening 20 is surrounded by the surrounding surface 21. The enclosed surface 21 includes a tapered portion 21a and a linear portion 21b. The tapered portion 21a faces the tapered portion 20a of the opening 20 and surrounds the tapered portion 20a. The tapered portion 21a extends from the surface of the wall 2c on the second direction D2 side toward the first direction D1, and its diameter decreases toward the first direction D1. The linear portion 21b extends linearly from the end of the tapered portion 21a in the first direction D1 toward the first direction D1 and reaches the surface of the wall 2c in the second direction D2. The diameter of the linear portion 21b is substantially constant. Each enclosure surface 21 faces the connection pin 13 of the ultrasonic vibrator 3 inserted into the opening 20 and surrounds the connection pin 13. The enclosure surface 21 and the opening 20 are for positioning the connection pin 13. The wall 2c is an example of the inserted portion. The wall 2c is also referred to as a guide member or a positioning member, the surrounding surface 21 is also referred to as a guide surface or a positioning surface, and the tapered portion 21a and the linear portion 21b are also referred to as portions.

Further, as shown in FIG. 2, the case 2, that is, the oscillator accommodating chamber 2a and the substrate accommodating chamber 2b are filled with the sealing member 23. The sealing member 23 seals the connection pin 13 and the circuit board 4. The sealing member 23 is made of a material having moisture resistance, insulation and elasticity.

Next, an assembly method (manufacturing method) of an ultrasonic sensor will be described. First, the circuit board 4 is housed in the board housing chamber 2b of the case 2 and fixed to the fixing portion of the case 2. Further, the elastic member 22 is attached to the ultrasonic vibrator 3. Next, the ultrasonic vibrator 3 with the elastic member 22 attached is inserted into the vibrator accommodating chamber 2a from the opening end 2j (FIG. 9) of the oscillator accommodating chamber 2a of the case 2, and the elastic member 22 is inserted. Is abutted against the positioning portion 2k of the case 2. As a result, the support 11 is positioned by the positioning portion 2k via the elastic member 22. Further, at this time, the hooked portion 22c of the elastic member 22 is hooked on the end portion of the first tubular portion 2d of the case 2 in the second direction D2. At this time, the two connection pins 13 are inserted into the two openings 20 and inserted into the two through holes 4c of the circuit board 4. When the connection pin 13 comes into contact with the enclosure surface 21 when inserted into the opening 20, the enclosure surface 21 guides the connection pin 13 toward the through hole 4c while restricting movement in the direction intersecting the central axis Ax. Enter the hall 4c. Further, for example, when the connecting pin 13 is inclined with respect to the first direction D1, the extending direction of the connecting pin 13 can be adjusted to the first direction D1 by the surrounding surface 21 in contact with the connecting pin 13. That is, the surrounding surface 21 functions as a guide portion and a positioning portion of the connection pin 13. Further, at this time, since the tapered portion 20a is provided in the opening 20, it is easy to insert the connection pin 13 into the opening 20. The connection pin 13 and the peripheral surface of the through hole 4c may be separated or in contact with each other.

Next, the connection pin 13 is fixed to the circuit board 4 by soldering or the like. Next, the sealing member 23 is filled in the case 2 (the substrate accommodating chamber 2b and the oscillator accommodating chamber 2a) from the open end of the substrate accommodating chamber 2b. At this time, the sealing member 23 enters the oscillator accommodating chamber 2a from the substrate accommodating chamber 2b through the communication hole 2f and the opening 20. The sealing member 23 filled in the case 2 is thermoset.

As described above, in the present embodiment, the opening 20 is provided for each connection pin 13 on the wall 2c (inserted portion). According to such a configuration, for example, it is easy to position each connection pin 13 when assembling the ultrasonic sensor 1. Therefore, it is easy to assemble the ultrasonic sensor 1.

Further, in the present embodiment, for example, the opening 20 includes a tapered portion 20a whose diameter decreases toward the first direction D1. According to such a configuration, for example, when assembling the ultrasonic sensor 1, it is easy to insert the connection pin 13 into the opening 20. Therefore, it is easy to assemble the ultrasonic sensor 1. Further, since the diameter of the tapered portion 20a becomes smaller toward the first direction D1, the connection pin 13 is prevented from being caught by the tapered portion 20a.

Further, in the present embodiment, for example, the wall 2c, which is the inserted portion, is provided in the case 2. With such a configuration, for example, it is possible to prevent the members other than the case 2 from becoming complicated.

Further, in the present embodiment, the intermediate position P2 of the two openings 20 in the direction orthogonal to the axial direction of the central axis Ax of the tubular portion 14c and the first tubular portion 2d is deviated from the central axis Ax. According to such a configuration, by inserting the two connection pins 13 into the two openings 20, the ultrasonic vibrator 3 is attached to the case 2 (first cylinder portion 2d) in a predetermined posture. .. That is, the ultrasonic vibrator 3 can be attached to the case 2 only in a predetermined posture. Therefore, it is possible to prevent an error in the assembly posture of the ultrasonic vibrator 3.

Further, in the present embodiment, the wall 2c of the case 2 is provided with a plurality of communication holes 2f in which the oscillator accommodating chamber 2a and the substrate accommodating chamber 2b are communicated with each other. Therefore, for example, as compared with a configuration in which only one communication hole 2f is provided, the fluidity of the sealing member 23 is improved, and the molding accuracy of the sealing member 23 is likely to be improved.

<Second embodiment>
FIG. 9 is a schematic and exemplary cross-sectional view of the ultrasonic sensor 1 of the present embodiment, showing a cross-sectional view corresponding to FIG. FIG. 10 is an enlarged view of the periphery of the connection pin 13 of the ultrasonic vibrator 3 in FIG.

The ultrasonic sensor 1 of the present embodiment shown in FIGS. 9 and 10 has the same configuration as the ultrasonic sensor 1 of the first embodiment. Therefore, the same result (effect) based on the same configuration as that of the first embodiment can be obtained by this embodiment as well.

However, in this embodiment, the members provided with the opening 20 and the surrounding surface 21 are mainly different from those in the first embodiment. In the present embodiment, the opening 20 and the surrounding surface 21 are provided on the plate member 50 provided in the case 2 and superposed on the circuit board 4.

The plate member 50 is fixed to the surface of the circuit board 4 in the second direction D2 and is arranged between the support 11 of the ultrasonic vibrator 3 and the circuit board 4. The opening 20 and the surrounding surface 21 are provided so as to penetrate the plate member 50 in the thickness direction (first direction D1). The opening 20 includes a tapered portion 20a and a linear portion 20b, as in the first embodiment. In the present embodiment, the diameter of the linear portion 20b is the same as the diameter of the through hole 4c of the circuit board 4. The diameter of the linear portion 20b may be larger than the diameter of the through hole 4c. Further, the surrounding surface 21 includes a tapered portion 21a and a linear portion 21b, as in the first embodiment. The plate member 50 is an example of an inserted portion.

As described above, in the present embodiment, for example, the plate member 50 to be inserted is provided on the circuit board 4. With such a configuration, for example, it is possible to prevent the members other than the circuit board 4 from becoming complicated.

In each of the above embodiments, an example in which the connection pin 13, the opening 20, and the surrounding surface 21 are provided by two each is shown, but the present invention is not limited to this. For example, the connection pin 13, the opening 20, and the surrounding surface 21 may be provided in three or more each.

Further, in each of the above embodiments, there is an example in which the tapered portion 20a of the opening 20 is open on the surface of the wall 2c on the support 11 side, that is, an example in which the tapered portion 20a is provided at the end of the opening in the second direction D2. Shown, but not limited to. The tapered portion 20a may be provided at the intermediate portion of the opening portion 20 in the first direction D1, or may be provided at the end portion of the opening portion 20 in the first direction D1. Further, the opening portion 20 may not include the linear portion 20b and may be composed of only the tapered portion 20a.

Further, in each of the above embodiments, an example in which the support 11 is composed of a combination of the housing 14, the sealing member 15, and the protective member 16 is shown, but the present invention is not limited thereto. For example, another member may be provided between the protective member 16 and the sealing member 15. Further, the protective member 16 may not be provided.

Further, in each of the above embodiments, an example in which the ultrasonic vibrator 3 is attached to the case 2 with the circuit board 4 fixed to the case 2 is shown, but the present invention is not limited to this. For example, the circuit board 4 may be fixed to the case 2 after the ultrasonic vibrator 3 is attached to the case 2.

Although the embodiments of the present invention have been illustrated above, the above embodiments are merely examples and are not intended to limit the scope of the invention. The above embodiment can be implemented in various other embodiments, and various omissions, replacements, combinations, and changes can be made without departing from the gist of the invention. In addition, specifications (structure, type, direction, shape, size, length, width, thickness, height, number, arrangement, position, material, etc.) of each configuration, shape, display element, etc. are changed as appropriate. Can be carried out.

1 ... Ultrasonic sensor, 2 ... Case, 2c ... Wall (inserted part), 3 ... Ultrasonic oscillator, 4 ... Circuit board, 11 ... Support, 12 ... Piezoelectric element, 13 ... Connection pin, 20 ... Opening , 20a ... Tapered portion, 50 ... Plate member (inserted portion), D1 ... First direction.

Claims (4)

An ultrasonic transducer having a support, a piezoelectric element supported by the support, and a plurality of connection pins electrically connected to the piezoelectric element and protruding in the first direction from the support.
A circuit board arranged in the first direction of the support and electrically connected to the plurality of connection pins.
A case containing the ultrasonic vibrator and the circuit board,
An inserted portion provided between the support and the circuit board and provided with an opening into which the connection pin is inserted.
Equipped with
The opening includes a tapered portion whose diameter decreases toward the first direction, and is an ultrasonic sensor provided for each connection pin. An ultrasonic transducer having a support, a piezoelectric element supported by the support, and a plurality of connection pins electrically connected to the piezoelectric element and protruding in the first direction from the support.
A circuit board arranged in the first direction of the support and electrically connected to the plurality of connection pins.
A case containing the ultrasonic vibrator and the circuit board,
An inserted portion provided between the support and the circuit board and provided with an opening into which the connection pin is inserted.
Equipped with
The opening is an ultrasonic sensor including a tapered portion whose diameter decreases toward the first direction. The ultrasonic sensor according to claim 1 or 2 , wherein the inserted portion is provided in the case. The ultrasonic sensor according to claim 1 or 2 , wherein the inserted portion is fixed to the circuit board.

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