JP5984081B2 - Ultrasonic sensor - Google Patents

Description

  The present invention relates to an ultrasonic sensor.

  Conventionally, an ultrasonic sensor that transmits ultrasonic waves and receives ultrasonic waves reflected by an obstacle has been provided. Examples of this type of ultrasonic sensor include a Doppler sensor that determines the presence or absence of an obstacle based on a Doppler shift in received ultrasonic waves.

  Further, as the above ultrasonic sensor, there is one used by being attached to a bumper 1 of an automobile as shown in FIG. 18 (see, for example, Patent Document 1).

  More specifically, the ultrasonic sensor of FIG. 18 is fixed to the bumper 1 so as to be inserted into the exposure hole 11 provided in the bumper 1, and is on the outer surface side of the bumper 1 (left side in FIG. 18). The outer block 91 inserted into the exposure hole 11 from the inner side and the inner block 92 coupled to the outer block 91 from the inner surface side (right side in FIG. 18) of the bumper 1 are provided. In other words, the ultrasonic sensor is fixed to the bumper 1 by coupling the outer block 91 and the inner block 92 with the bumper 1 interposed therebetween.

  However, in the structure in which the bumper 1 is sandwiched between the outer block 91 and the inner block 92 as shown in FIG. 18, the protruding amount by which the outer block 91 protrudes to the outer surface side (left side in FIG. 18) of the bumper 1 is relatively large. It was bigger and looked bad when attached to bumper 1.

JP 2010-194441 A

  Therefore, it is conceivable to fix the ultrasonic sensor to the inner surface of the bumper using an adhesive sheet or the like.

  In this case, in order to prevent the ultrasonic sensor from projecting to the outer surface side of the bumper, the insertion depth of the ultrasonic sensor into the exposed hole of the bumper may be about the thickness dimension of the bumper.

  However, in that case, since the insertion depth into the exposure hole is relatively small, positioning of the ultrasonic sensor by insertion into the exposure hole becomes relatively difficult.

  The present invention has been made in view of the above-described reasons, and an object thereof is to provide an ultrasonic sensor that can suppress the protruding dimension of the bumper to the outside and can be easily positioned with respect to the bumper. It is in.

  The ultrasonic sensor according to the present invention holds at least one of a mounting base fixed to the inner surface of the bumper, a transmitting means for transmitting ultrasonic waves, and a receiving means for receiving ultrasonic waves, and is coupled to the mounting base to connect the bumper. A sensor body that is exposed from an exposure hole provided on the mounting base, and a position at which a projecting dimension of the sensor body from an end surface of the mounting base that faces the inner surface of the bumper matches a thickness dimension of the bumper One of the engagement hole and the engagement convex portion that are engaged with each other to generate a coupling force between the mounting base and the sensor main body are provided in the mounting base and the sensor main body, The main body is movable relative to the mounting base so that the protruding dimension of the bumper to the outside is larger than the position where the engaging hole and the engaging convex portion engage with each other in a concave-convex manner, Sensor book Are temporarily engaged with each other in a state where the engagement holes and the engagement protrusions are moved in parallel so as to increase the projecting dimension of the bumper to the outside of the position where the protrusions are engaged with each other. One of the joint hole and the temporary engagement convex portion is provided on the sensor main body and the mounting base.

  In the above ultrasonic sensor, it is desirable that the mounting base has a dimensional shape that allows the sensor body to be coupled only from the side directed toward the inner surface of the bumper.

  Further, in the above ultrasonic sensor, the mounting base includes a fixing portion that is fixed to the bumper, and a clip portion that is elastically swingable with respect to the fixing portion by receiving an operating force. It is desirable that one of the engagement hole and the engagement convex portion is provided on the clip portion and the outer surface of the sensor body.

  Furthermore, in the above ultrasonic sensor, it is preferable that the temporary engagement convex portion has a truncated pyramid shape or a spherical shape.

  Furthermore, in the above ultrasonic sensor, it is preferable that the contour of the end surface directed toward the inner surface of the bumper in the mounting base is noncircular.

  In the above ultrasonic sensor, it is desirable that a hole for positioning with respect to the bumper is provided in the mounting base.

  Furthermore, in the above ultrasonic sensor, it is desirable that the outer peripheral surface of the end portion directed toward the outside of the bumper in the sensor body is inclined so as to gradually increase the outer shape toward the inside of the bumper.

  In the ultrasonic sensor described above, it is desirable that the sensor main body be provided with an elastic contact portion that elastically contacts the inner peripheral surface of the exposure hole in a state where the attachment to the bumper is completed.

  Furthermore, in the above ultrasonic sensor, it is preferable that the sensor main body has a flange made of an elastic material and covering an opening edge of the exposed hole when viewed from the outside of the bumper.

  In the ultrasonic sensor described above, it is preferable that a portion of the sensor body exposed when viewed from the outside of the bumper has the same color as the outer surface of the bumper.

  According to the present invention, compared to the case where the bumper is fixed to the bumper so as to sandwich the bumper from inside and outside, it is possible to suppress the protruding dimension of the bumper to the outside. Further, by introducing the sensor main body into the exposure hole in a state in which the projecting dimension of the sensor main body from the mounting base is increased, positioning of the mounting base with respect to the bumper becomes relatively easy.

(A) (b) is a perspective view which respectively shows embodiment of this application, (a) shows the process of the attachment to a bumper, (b) shows the state which the attachment to a bumper was completed. It is an exploded perspective view showing the same as above. It is a disassembled perspective view which shows a sensor main body same as the above. It is a perspective view which shows the state by which the adhesive tape was stuck on the same. (A)-(c) is a perspective view which shows the method of fixing the same as above with respect to a bumper by caulking, (a) (b) shows a fixing process, respectively, (c) shows the state which fixing was completed. Show. (A) (b) is a perspective view which shows the method of fixing the same to a bumper by screwing, (a) shows the process of fixing, (b) shows the state which fixing was completed. (A) (b) is a perspective view which shows the method of positioning with respect to a bumper same as the above, (a) shows the process of positioning, (b) shows the state which positioning completed. It is the perspective view which looked at the state fixed to the bumper from the inner surface side of the bumper. (A) (b) is a perspective view which shows the sensor main body of the comparative example same as the above, respectively, (a) (b) shows a mutually different comparative example. It is a perspective view which shows the principal part of the process attached to a bumper in the example of a change same as the above. It is a perspective view which shows what the holding | maintenance rubber was adhere | attached on the vibration block in the example of FIG. It is a perspective view which shows the body in the example of FIG. It is a perspective view which shows the sensor main body in the example of FIG. It is a perspective view which shows the sensor main body of another modified example same as the above. It is sectional drawing which shows the state with which the example of FIG. 14 was attached to the bumper. It is a perspective view which shows the sensor main body of another modified example same as the above. It is sectional drawing which shows the state with which the example of FIG. 16 was attached to the bumper. It is sectional drawing which shows a prior art example.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  The present embodiment is mounted on a vehicle (not shown) to detect an obstacle in the traveling direction of the vehicle, and is attached with the direction in which ultrasonic waves are transmitted and received directed toward the front or rear of the vehicle.

  In the present embodiment, as shown in FIG. 2, the mounting base 2 fixed to the inner surface of the bumper 1 of the vehicle, the transmitting means for transmitting and receiving ultrasonic waves, and the piezoelectric element as the receiving means are provided in the bumper 1. And a sensor body 3 that is inserted into the exposure hole 11 and is coupled to the mount 2.

  As shown in FIG. 3, the sensor main body 3 includes a cylindrical vibration block 4 having a piezoelectric element, a cylindrical holding rubber 5 that covers the outer peripheral surface of the vibration block 4, and a vibration block 4 to which the holding rubber 5 is attached. And a body 6 into which is fitted. Hereinafter, of the thickness direction of the bumper 1 and the corresponding direction, the outward direction of the bumper 1 is referred to as the front, and the inward direction of the bumper 1 is referred to as the rear. The front-rear direction is defined for convenience of explanation, and does not necessarily match the front-rear direction of the vehicle.

  The vibration block 4 is, for example, one in which a piezoelectric element is fixed to the inner bottom surface of a case made of a bottomed cylindrical metal whose rear surface is open with the axial direction facing the front-rear direction, and the case is filled with a filler. In addition, the ultrasonic wave enters and exits on the outer bottom surface (the front surface, the left surface in FIG. 3) of the case.

  As the material of the holding rubber 5, for example, an elastic material such as an elastomer can be used. The holding rubber 5 has a cylindrical shape with the axial direction oriented in the front-rear direction and surrounding the vibration block 4, and a flange portion 52 projecting radially outward from the front end portion of the main body portion 51. Have. The flange 52 covers the front end surface of the body 6. The outer peripheral surface of the flange portion 52 is a cone that is inclined so as to reduce the outer diameter toward the front (that is, outside the bumper 1) (that is, to reduce the cross-sectional shape in a cross section parallel to the outer surface of the bumper 1). It has a trapezoidal shape. This makes it relatively easy to introduce the sensor body 3 from the inner surface side (rear side) of the bumper 1 to the exposure hole 11.

  The body 6 is made of, for example, a synthetic resin, and has a cylindrical main body 61 that covers the outer peripheral surface of the main body 51 of the holding rubber 5 with the axial direction facing the front-rear direction, and a rear end of the main body 61 (the right end in FIG. 3). A connector portion 62 projecting in a direction perpendicular to the axial direction of the main body portion 61. The main body 61 houses a signal processing circuit (not shown) that is electrically connected to the piezoelectric element and performs appropriate signal processing such as amplification and noise removal. The connector portion 62 has a cylindrical shape in which the axial direction is orthogonal to the axial direction of the main body portion 61, and is made of a conductive material and is electrically connected to the signal processing circuit (not shown). Is exposed inside. The above signal processing circuit is electrically connected to an external circuit by using a plug (not shown) having a plurality of contacts that are in one-to-one contact with the above contacts and inserted and connected to the connector portion 62. Connected.

  The sensor body 3 includes a cover 7 that is coupled to the body 6 and closes the opening on the rear side of the body portion 61. The cover 7 is made of, for example, a synthetic resin, and has a plate-like main body 71 and a joint projecting from both ends of one surface of the main body 71 to the one side in the thickness direction of the main body 71 (left side in FIG. 3). Claw 72. Each coupling claw 72 has a hook-like shape with its tip bent outward (in a direction away from the other coupling claw 72). On both sides in the radial direction of the main body 61 of the body 6 and in the direction orthogonal to the protruding direction of the connector 62, coupling holes 63 communicating with the inside and outside of the main body 61 are provided. The body 6 and the cover 7 are coupled to each other by engaging the tip of the coupling claw 72 one by one.

  Next, the mounting base 2 will be described. As shown in FIG. 2, the mounting base 2 protrudes in a direction along the inner surface of the bumper 1 from the holding portion 21 that holds the sensor body 3 and the front end portion (left end portion in FIG. 2) of the holding portion 21. And a fixing portion 22 fixed to the inner surface of the. The fixing portion 22 is a cross-shaped flat plate whose thickness direction is the front-rear direction, and is fixed to the bumper 1 with the front surface facing the bumper 1. Further, an insertion hole 220 through which the sensor body 3 is inserted is provided in the center portion of the fixing portion 22 in the thickness direction.

  As fixing means for fixing the fixing portion 22 to the inner surface (rear surface) of the bumper 1, for example, as shown in FIG. 4, a known adhesive sheet 81 is pasted between the fixing portion 22 and the inner surface of the bumper 1. Wear can be used. Further, as the fixing means, as shown in FIGS. 5A to 5C, the caulking convex portion 12 protruding from the inner surface of the bumper 1 is inserted into the insertion hole 221 provided in the fixing portion 22 and caulked. In other words, a caulking stop such as that the tip of the caulking convex portion 12 is plastically deformed by heat or pressure so as not to come out of the insertion hole 221 may be used. Alternatively, as the fixing means, as shown in FIGS. 6A and 6B, screwing with a screw 82 that is inserted into the insertion hole 221 of the fixing portion 22 and screwed into the bumper 1 may be used. In the example of FIGS. 6A and 6B, the screwing convex portion 13 having a cylindrical shape with a thread groove provided on the inner peripheral surface and screwed with the screw 82 is exposed on the inner surface side of the bumper 1. 4 are provided in a projecting manner so as to surround the four sides.

  Further, when positioning the mounting base 2 with respect to the bumper 1, as shown in FIGS. 7A and 7B, a ruled line 13 having the shape of the fixing portion 22 is drawn on the inner surface of the bumper 1, or the fixing portion 22. The positioning convex portion 14 that is inserted into the insertion hole 221 may protrude from the inner surface of the bumper 1. In particular, when the exposure hole 11 is circular, the adhesive tape 81 is used for fixing, and the orientation of the connector portion 62 needs to be strictly matched, the crease line 13 and the convex portion as described above. 14 is preferably used for alignment. In the present embodiment, the shape of the contour of the front surface, which is the end surface facing the bumper 1 in the fixed portion 22, is non-circular (cross shape), so that the positioning around the axis by the scribe line 13 as described above is possible. It has become. The ruled lines 13 are generally drawn by recesses (grooves) formed using a ruler needle or the like, but the ruled lines 13 can also be drawn by convex parts formed using putty or the like. It is.

  Each of the holding portions 21 is connected to the fixing portion 22 so that one end thereof is sandwiched between the two sandwiching portions 23 sandwiching the sensor body 3 and the other sandwiching portion 23 between the other sandwiching portions 23. And two connecting portions 24 for maintaining the distance. Further, as shown in FIG. 8, a bridge portion 27 is installed between the connecting portions 24. When the sensor main body 3 is to be attached to the mounting base 2 from the rear side, it interferes with the bridge portion 27 and the like. Can not be installed. That is, the sensor body 3 can be coupled to the mounting base 2 only from the front side (side directed to the inner surface of the bumper 1).

  Further, a clip portion 25 is connected to each sandwiching portion 23. Each clip part 25 has a shape that is long in the protruding direction of the sandwiching part 23 from the fixing part 22, and the longitudinal center part is connected to the sandwiching part 23 via an elastically deformable spring part 26. Thus, it can be elastically swung with respect to the sandwiching portion 23 (that is, with respect to the fixed portion 22). Each clip portion 25 has a step 251 that positions one end portion closer to the fixing portion 22 closer to the sensor body 3 than other portions in a state where the spring portion 26 is elastically restored. An engagement hole 250 is provided in a portion on the fixed portion 22 side (front side). Further, on each surface of the main body portion 61 of the body 6 that faces the clip portion 25, an engaging convex portion 31 is projected. The engagement convex part 31 has a truncated pyramid shape with a rear surface inclined so that the cross-sectional area in a cross section orthogonal to the protruding direction is smaller as the position is closer to the tip.

  When the sensor body 3 is coupled to the mounting base 2, a pressing force is applied to one end portion of each clip portion 25 on the side away from the fixing portion 22, so that the other end portion of each clip portion 25 is removed from the sensor body 3. Swing away. Next, the position of the engagement convex portion 31 of the sensor body 3 and the position of the engagement hole 250 are matched, and in this state, the above pressing force is released. Then, each clip portion 25 is restored by the spring force of the spring portion 26, and each engagement convex portion 31 is engaged with the engagement hole 250. Here, the coupling between the sensor body 3 and the mounting base 2 is completed. . Here, the sensor body 3 can be assembled to the mounting base 2 only through the insertion hole 220 of the fixed portion 22, and the assembly from the opposite side is impossible due to the presence of the connecting portion 24 and the bridge portion 27. Yes.

  Here, in a state where each engagement convex portion 31 is engaged with the engagement hole 250 (hereinafter, referred to as “coupled state”), the sensor body 3 protrudes from the end face directed to the bumper 1 in the fixing portion 22. The positions of the engagement holes 31 and the engagement holes 250 are designed so that the dimensions are substantially equal to the thickness dimension of the bumper 1. Thereby, in the state where the attachment to the bumper 1 is completed, the end surface of the sensor body 3 and the outer surface of the bumper 1 are substantially flush.

  Further, in the main body portion 61 of the body 6, provisional engagement that can be engaged with the engagement holes 250 that also serve as temporary engagement holes is provided on the rear side (right side in FIG. 2) of each engagement convex portion 31. A convex part 32 is provided in a protruding manner. That is, in a state where each temporary engagement convex portion 32 is engaged with the engagement hole 250 (hereinafter, referred to as “temporary coupling state”), the sensor body 3 from the front end surface facing the bumper 1 in the mounting base 2. The projecting dimension (that is, the stroke inserted through the exposure hole 11) is larger than the combined state.

  When attaching to the bumper 1, as shown in FIG. 1A, the sensor body 3 is inserted into the exposure hole 11 in a temporarily coupled state to fix the mounting base 2 to the bumper 1, and then the sensor body 3 is moved backward (exposed). What is necessary is just to push inside (in the right side in FIG. 1) inside the hole 11, and to make it transfer to the coupling state shown in FIG. The end portion (the right end portion in FIG. 2) that is the inner side of the bumper 1 in each engagement convex portion 31 is inclined so as to reduce the protruding dimension toward the end, and is in a combined state from the temporarily connected state as described above. When the transition is made, the clip portion 25 slides on the inclined surface of each engagement convex portion 31.

  According to the above configuration, since the coupling force to the bumper 1 is generated only in the mounting base 2 that is located entirely on the inner surface side of the bumper 1, the coupling force is obtained by sandwiching the bumper 1 from inside and outside as in the example of FIG. It is possible to suppress the protruding dimension of the bumper 1 to the outside as compared with the case where the above is generated. In addition, the sensor body 3 is introduced into the exposure hole 11 in a temporarily coupled state in which the projecting dimension of the sensor body 3 from the mount base 2 is larger than that in the coupled state, so that the positioning of the mount base 2 with respect to the bumper 1 is relatively easy. It becomes.

  Further, in the present embodiment, the temporary engagement convex portion 32 has a convex dimension that gradually decreases from the central portion toward the end portion in at least the front-rear direction (that is, the direction in which the distance from the bumper 1 is changed). It has a curved surface (for example, a spherical surface). Further, the projecting dimension of the temporary engaging convex part 32 from the main body part 61 is made smaller than the projecting dimension of the engaging convex part 31 from the main body part 61. As a result, as shown in FIG. 9 (a), the operation necessary for the transition from the temporarily coupled state to the coupled state is made as compared with the case where the temporary engaging convex portion 32 has the same truncated pyramid shape as the engaging convex portion 31. The power is getting smaller. Further, as shown in FIG. 9B, a temporary engagement hole 33 is provided in the sensor main body 3, and a temporary engagement convex portion (not shown) that engages with the temporary engagement hole 33 in a temporarily coupled state is provided on the mounting base 2. For example, the clip portion 25 may be provided. However, as in the case of the engagement hole 250 of the present embodiment, one of the engagement convex portion and the engagement hole is used as a temporary engagement convex portion or a temporary engagement hole. Can be simplified.

  In addition, you may provide the sensor main body 3 with the elastic contact convex part 53 which elastically contacts with the internal peripheral surface of the exposure hole 11, as shown in FIG. Specifically, as shown in FIG. 11, an elastic contact portion 53 is provided on the outer peripheral surface of the holding rubber 5, and as shown in FIG. 12, the elastic contact portion 53 is inserted into the body portion 61 of the body 6. By providing the notch 64, the elastic contact projection 53 is protruded in the radial direction from the main body 61 of the body 6 as shown in FIG. 10 to 13, the outer diameter of the flange portion 52 of the holding rubber 5 is larger than the outer diameter of the main body portion 61 of the body 6, and the elastic contact convex portion 53 is an outer peripheral surface of the flange portion 52 and the main body portion 51. And connected to In addition, three elastic contact protrusions 53 are provided at equal intervals with the positions shifted by about 120 ° in the circumferential direction of the main body 51. If the said structure is employ | adopted, shakiness of the sensor main body 3 with respect to the bumper 1 will be suppressed. Furthermore, in the example of FIG. 11, bottom portions 54 and 65 that prevent the vibration block 4 from falling are provided on the holding rubber 5 and the body 6, respectively. The bottom portions 54 and 65 each have an annular shape whose outer periphery is connected to the main body portions 51 and 61, and wiring (not shown) connected to the vibration block 4 is inserted into the bottom portions 54 and 65.

  Further, as shown in FIGS. 14 to 17, the outer diameter of the flange portion 52 may be larger than the outer diameter of the main outer portion 61 of the body 6. In this case, if the inner diameter of the exposure hole 11 is smaller than the outer diameter of the flange portion 52 and larger than the outer diameter of the main body portion 61 of the body 6, the opening edge (exposure) of the exposure hole 11 when viewed from the outside of the bumper 1. The gap between the inner peripheral surface of the hole 11 and the outer peripheral surface of the main body portion 61 of the body 6 can be covered with the flange portion 52 to improve the appearance. When the inner diameter of the exposure hole 11 is set as described above, when the front end portion of the sensor body 3 is inserted into the exposure hole 11 from the inside (rear side) of the bumper 1, the flange portion 52 is elastically deformed. In the example of FIGS. 14 and 15, the flange portion 52 is provided with an annular step 521 that positions the outer peripheral portion in front of the inner peripheral portion, and the rear surface of the flange portion 52 is provided on the outer peripheral side of the step 521. In a state where the portion is in contact with the outer surface of the bumper 1, the portion on the inner side of the step 521 and the front surface of the sensor body 4 are flush with the outer surface (front surface) of the bumper 1. In the examples of FIGS. 16 and 17, the front surface of the flange portion 52 has a convex curved surface shape whose thickness dimension is reduced as it is closer to the inner and outer peripheral edges, and at the inner and outer peripheral ends of the flange portion 52, No step is generated between the front surface of the vibration block 4 or the front surface of the bumper 1 and the front surface of the flange portion 52.

  Further, in each of the above-described embodiments, in order to improve the appearance of the bumper 1 so as not to be noticeable from the outside, the portion exposed to the outside of the bumper 1 (that is, the front surface of the vibration block 4 or the flange portion of the holding rubber 5). 52) is preferably the same color as the bumper 1. Specifically, when the color of the bumper 1 to be attached is fixed, the front surface of the vibration block 4 and the flange portion 52 of the holding rubber 5 are colored in that color.

DESCRIPTION OF SYMBOLS 1 Bumper 2 Mounting stand 3 Sensor main body 11 Exposed hole 22 Fixing part 25 Clip part 31 Engaging convex part 32 Temporary engaging convex part 33 Temporary engaging hole 52 Gutter part 53 Elastic contact convex part 221 Insertion hole (For positioning with respect to bumper Holes)
250 engagement hole (also serves as temporary engagement hole)

Claims (10)

A mounting base fixed to the inner surface of the bumper;
A sensor body that holds at least one of a transmitting unit that transmits ultrasonic waves and a receiving unit that receives ultrasonic waves and is coupled to the mounting base and exposed from an exposure hole provided in the bumper;
The mounting base and the sensor body are engaged with each other at a position where the projecting dimension of the sensor body from the end face of the mounting base that is directed to the inner surface of the bumper matches the thickness dimension of the bumper. One of each of the engagement hole and the engagement convex portion that generate a coupling force is provided on the mounting base and the sensor body,
The sensor main body is movable in parallel with the mounting base so that a protruding dimension of the bumper to the outside is larger than a position where the engaging hole and the engaging convex portion engage with each other. ,
The sensor body is engaged with each other in a state of being moved parallel to the mounting base so that the projecting dimension to the outside of the bumper is larger than the position where the engaging hole and the engaging convex portion engage with each other. One of the temporary engagement hole and temporary engagement convex part to be provided is provided in the said sensor main body and the said mounting base, The ultrasonic sensor characterized by the above-mentioned.   2. The ultrasonic sensor according to claim 1, wherein the mounting base is dimensioned so that the sensor main body can be coupled only from the side directed toward the inner surface of the bumper. The mounting base includes a fixing portion that is fixed to the bumper, and a clip portion that is elastically swingable with respect to the fixing portion under an operating force,
The ultrasonic sensor according to claim 1, wherein one of the engagement hole and the engagement convex portion is provided on the clip portion and the outer surface of the sensor body.   The ultrasonic sensor according to claim 1, wherein the temporary engagement convex portion has a truncated pyramid shape or a spherical shape. The ultrasonic sensor according to any one of claims 1 to 4 , wherein a contour of an end surface of the mounting base directed toward an inner surface of the bumper is noncircular . The ultrasonic sensor according to claim 1 , wherein a hole for positioning with respect to the bumper is provided in the mounting base . The outer peripheral surface of the end portion directed to the outside of the bumper in the sensor body is inclined so as to gradually increase the outer shape toward the inside of the bumper. The ultrasonic sensor as described in. 8. The sensor main body is provided with an elastic contact projection that elastically contacts an inner peripheral surface of the exposure hole in a state where the attachment to the bumper is completed. The ultrasonic sensor as described in. The ultrasonic sensor according to any one of claims 1 to 8, wherein the sensor body is made of an elastic material and has a flange portion that covers an opening edge of the exposed hole when viewed from the outside of the bumper . The exposed portion of the sensor body as viewed from the outside of the bumper
The ultrasonic sensor according to claim 1, wherein the ultrasonic sensor has the same color as the surface .

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