JP4725588B2 - Fixed member - Google Patents

Description

  The present invention relates to a fixing member.

  Conventionally, there is a bezel disclosed in Patent Document 1 as an example of a fixing member that fixes a sensor to an attached body such as a bumper of a vehicle body.

  The bezel disclosed in Patent Document 1 is formed of a substantially cylindrical member made of, for example, resin, and a flange having a partially enlarged diameter is formed at one end. The shape and size of the hollow portion of the bezel correspond to the shape of the opening surface in the sensor body, and the ultrasonic vibrator is inserted into the hollow portion.

  A snap fit is provided on the lower surface of the bezel. This snap fit functions as a claw-shaped locking portion, and the claw portion formed at the tip is inserted into the hole of the receiving portion of the case of the sensor main body described above, so that it is hooked on the receiving portion. ing. Thereby, the bezel and the sensor main body are more firmly fixed.

A plurality of metal springs are arranged on the side wall of the bezel. Specifically, a through hole is provided in the side wall of the bezel, and the free end of the metal spring is disposed in the through hole. When the bezel is inserted into the hole of the bumper, the free end of the metal spring is pushed by the wall surface of the hole and protrudes from the inner wall surface of the bezel. To be. With the elastic reaction force of the metal spring, an ultrasonic sensor that can firmly fix the bezel to the bumper and firmly fix the sensor body to the bezel can be obtained.
JP 2007-248230 A

  However, when the sensor body is fixed to the attached body, it may be necessary to fix the sensor body in a state where the detection surface of the sensor body is inclined with respect to the attached body due to a design problem or the like. In other words, the sensor main body may need to be fixed to the inclined attached body without changing the direction of the detection surface.

  In such a case, if the bezel in patent document 1 is used, a contact point with the hole of the to-be-attached body in each metal spring will differ. Therefore, there is a possibility that the elastic reaction force varies among the plurality of metal springs, and the sensor body cannot be fixed to the mounted body.

  It is also conceivable to suppress variations in the elastic reaction force in the plurality of metal springs by making the shapes and materials of the plurality of metal springs different depending on the positions where they are arranged. However, if the shapes and materials of the plurality of metal springs are made different in this way (in other words, when similar parts are used), it may cause erroneous assembly.

  The present invention has been made in view of the above problems, and is to fix a sensor body with a detection surface inclined with respect to a mounted body, and to provide a fixing member that can suppress erroneous assembly. Objective.

In order to achieve the above object, the fixing member according to claim 1 is for fixing a cylindrical sensor body having a detection surface at a tip to an attached body having a hole, and attached to the attached body. A fixing member that is fixed in a state in which the detection surface is inclined, and has a plurality of spring members made of the same shape and the same material, and has a hollow portion with an opening formed at least on one end side. When the sensor body is fixed to the body to be attached, a cylindrical portion inserted into the hole portion in a state where at least a part of the sensor main body is disposed in the hollow portion, and provided on the side wall of the cylindrical portion, and penetrates to the hollow portion. A plurality of attachment portions to which spring members are attached, including through-holes, and attached to the attachment portion in a state in which at least a part of the sensor body is disposed in the hollow portion and the cylindrical portion is inserted into the hole portion. Between the hole and the spring member Elastically compressed and deformed, the elastic reaction force hole associated with this compressive deformation, the sensor body, which fixes the sensor body to the attached body by acting on the cylindrical portion, the plurality of mounting portions, a plurality of contact position and contact angle of the hole portion of the spring member is characterized in Rukoto provided so as to be equal.

As described above, a plurality of spring members made of the same shape and the same material are used, and furthermore, the attachment portion to which the spring member is attached has the same contact position and contact angle with the hole in the plurality of spring members. By providing, the elastic reaction force of all the spring members can be made substantially equivalent. Therefore, it is possible to suppress erroneous assembly when fixing the sensor body with the detection surface inclined with respect to the mounted body.

  According to a second aspect of the present invention, the sensor body includes an ultrasonic transducer, and the detection surface may be a vibration surface. That is, you may apply the fixing member of Claim 1 to an ultrasonic sensor. When the ultrasonic sensor is erroneously assembled to the mounted body, the ultrasonic transmission direction is displaced from an appropriate direction and an accurate detection result cannot be obtained. However, it is preferable to apply the fixing member according to claim 1 to the ultrasonic sensor, since erroneous assembly is suppressed and accurate detection can be performed.

According to a third aspect of the present invention , the sensor body may be fixed to a vehicle body part including at least a bumper as the mounted body. That is, you may apply the fixing member of Claim 1 or Claim 2 to the fixing member of the sensor mounted in a vehicle. When attaching a sensor to a body part such as a bumper, it may be necessary to attach the sensor to an inclined surface or the like due to a problem in appearance. Therefore, by applying the fixing member according to claim 1 or 2, it is preferable because erroneous assembly can be suppressed and accurate detection can be performed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a schematic configuration of a bezel (not provided with a leaf spring) in an embodiment of the present invention. FIG. 2 is a side view from the snap-fit side showing a schematic configuration of a bezel (plate spring mounting) in the embodiment of the present invention. FIG. 3 is a side view from the snap-fit side showing a schematic configuration of a bezel (plate spring mounting) in the embodiment of the present invention. FIG. 4 is a side view showing a schematic configuration of the leaf spring in the embodiment of the present invention. FIG. 5 is a plan view showing a schematic configuration of the leaf spring in the embodiment of the present invention. FIG. 6 is a partial perspective view of a bumper to which the bezel of the present invention is assembled. FIG. 7 is a side view showing a schematic configuration when the bezel is assembled to the bumper in the embodiment of the present invention. FIG. 8 is a side view showing a schematic configuration in a state where the bezel is assembled to the bumper in the embodiment of the present invention. FIG. 9 is a side view showing a schematic configuration in a state in which the sensor main body is attached to the bezel in the embodiment of the present invention. FIG. 10 is a partial cross-sectional view for explaining the attachment angle of the leaf spring in the embodiment of the present invention. FIG. 11 is a partial cross-sectional view for explaining the fixing structure in the embodiment of the present invention. FIG. 12 is a side view for explaining the attachment position of the leaf spring in the embodiment of the present invention. FIG. 13 is an explanatory diagram for explaining the attachment position of the leaf spring in the comparative example.

  The bezel 10 in the present embodiment is a fixing member that fixes the sensor main body 30 of the ultrasonic sensor to a vehicle attachment body (for example, a bumper or the like, and the bumper 20 is adopted in the present embodiment). In particular, the bezel 10 is a fixing member that is fixed to the bumper 20 in a state where the detection surface (vibration surface) 30 l (opening surface 10 l of the bezel 10) of the sensor body 30 is inclined. That is, the sensor body 30 is fixed to the inclined portion of the bumper 20.

  The ultrasonic sensor includes a sensor body 30 and a bezel 10 that fixes the sensor body 30 to the bumper 20. And the ultrasonic sonar attached to the to-be-attached body of a vehicle is used as a back sonar or a corner sonar.

  The ultrasonic sensor is fixed in the hole 21 of the bumper 20 as shown in FIG. Specifically, in the ultrasonic sensor, after the bezel 10 is inserted into the hole 21 of the bumper 20 from the outside (vehicle outside) of the bumper 20, the sensor body 30 is inserted into the hollow portion 10 d of the bezel 10 and inside the bumper 20. It is inserted from (inside the vehicle) and fixed to the bumper 20 by elastic reaction forces of a plurality of leaf springs 12 which will be described later. Note that the sensor main body 30 of the ultrasonic sensor fixed to the bezel 10 is disclosed in, for example, Japanese Patent Application Laid-Open No. 2007-248230, etc., by the applicant of the present application. Is omitted.

  As shown in FIGS. 1 to 3, the bezel 10 is made of, for example, resin or the like, and is formed of a substantially cylindrical member and has a cylindrical portion 10m having a hollow portion 10d (corresponding to the cylindrical portion of the present invention). And a cylindrical portion 10m), and a snap fit 10b (sensor fixing portion) is formed protruding from the cylindrical portion 10m. A flange 10a having a partially enlarged diameter is formed at one end of the cylindrical portion. The shape and size of the hollow portion 10 d of the bezel 10 correspond to the shape of the opening surface in the sensor body 30. In the state where the bezel 10 is inserted into the hole portion 21, the opening surface of the sensor body 30 and the ultrasonic transducer (at least the detection portion of the sensor) are inserted into the hollow portion 10d. On the inner side of the flange 10a (in the radial direction of the cylindrical portion 10m), an opening surface 101 is provided so that the vibration surface 301 of the sensor body 30 inserted into the hollow portion 10d is exposed outside the vehicle. The flange 10a has one surface (the lower side in FIG. 3) arranged outside the vehicle, and the other surface (around a cylindrical portion described later) faces the surface of the bumper 20 on the bezel side mounting surface. 10a1. The opening surface 101 is in a parallel relationship with the vibration surface 301 of the sensor body 30.

  The bezel 10 is provided with the snap fit 10b protruding from the cylindrical portion as described above. More specifically, the snap fit 10b protrudes outward in the radial direction of the cylindrical portion, and has a shape protruding from the protruding portion in the axial direction of the cylindrical portion. That is, the snap fit 10b is substantially L-shaped. Hereinafter, the portion protruding in the radial direction of the cylindrical portion and protruding in the axial direction of the cylindrical portion from the protruding portion is also referred to as a tip portion.

  As shown in FIG. 9, the snap fit 10 b functions as a claw-shaped locking portion, and the claw portion 10 c formed at the distal end portion of the snap fit 10 b is a hole 32 of the receiving portion 31 of the sensor body 30. It is hooked on the receiving part 31 by being inserted in. Thereby, the bezel 10 and the sensor body 30 are more firmly fixed.

  1 and 2, a U-shaped slit 10j is formed so as to surround the claw portion 10c, and the claw portion 10c disposed between the slits 10j is easily elastically deformed. Yes. The slit 10j is configured such that when the tip end portion of the snap fit 10b is inserted into the hole 32 of the receiving portion 31, the claw portion 10c bends with the front in the insertion direction as a fulcrum by elastic deformation and can be easily inserted into the hole. ing. For this reason, when the nail | claw part 10c returns to the original shape after the front-end | tip part of the snap fit 10b is inserted in the hole of the receiving part 31, it is a back position (substantially L shape) in the front-end | tip part of the snap fit 10b. In a portion between the bent portion bent into a shape and the claw portion 10c), the wall surface of the tip portion of the snap fit 10b can be made to be in a state without a gap so as to substantially contact the inner wall of the receiving portion 31.

  Note that the bezel 10 and the sensor main body 30 are fixed not only by the snap fit 10b provided on the bezel 10 and the receiving portion 31 provided on the sensor main body 30, but also by another mechanism. Also good. For example, a recessed portion for fitting may be provided on the outer peripheral surface of the bezel 10 and on the opposite side of the snap fit 10b, and the bezel 10 may be locked by a fitting claw included in the sensor 30.

  Further, as shown in FIG. 1, the bezel 10 includes a plurality of (here, four) groove-shaped leaf spring mounting portions (corresponding to mounting portions in the present invention) 10g at equal intervals with respect to the center of the cylindrical portion. Is formed. The leaf spring mounting portion 10g is a characteristic part of the present invention and will be described in detail later. As shown in FIG. 1, two through holes 10 h and 10 i arranged in the central axis direction of the bezel 10 are formed in each leaf spring mounting portion 10 g. Then, as shown in FIG. 2 and the like, a plate spring 12 made of metal is disposed along each plate spring mounting portion 10g. The leaf spring 12 is fixed to the bezel 10 by the return portion 12a engaging with the through hole 10h in a state where the bent portion 12e is disposed in the through hole 10i.

  Specifically, the leaf spring 12 is configured by bending a thin plate metal as shown in FIGS. In the present embodiment, four leaf springs 12 are employed, but all the leaf springs 12 are made of the same shape (also having the same size) and the same material. That is, in the present embodiment, the common leaf spring 12 is employed. Therefore, the four leaf springs 12 may be attached to any of the four leaf spring attachment portions 10g.

  4 and 5, the leaf spring 12 is bent in a U shape in accordance with the return portion 12a in which one end of the plate metal is bent in a claw shape and the end shape of the opening portion of the bezel 10. From the U-shaped portion 12b thus formed, a convex portion 12c projecting radially outward from the outer peripheral surface of the bezel 10, a folded portion 12d in which the other end of the plate metal is folded back toward the returning portion 12a, and a folded portion 12d It has a bent portion 12e formed in a curved surface and a presser portion 12f formed at the tip of the bent portion 12e.

  When the return portion 12a of the leaf spring 12 is inserted from the opening end of the bezel 10 (upper side in the drawing in FIG. 1) and the U-shaped portion 12b is inserted until it contacts the opening end of the bezel 10, the bent portion 12e is obtained. Is fixed to the bezel 10 by the return portion 12a entering the through-hole 10h and being caught in the state where it is disposed in the through-hole 10i. For this reason, the side fixed to the bezel 10 of the leaf spring 12, that is, the U-shaped portion 12b serves as a fixed end, and the folded portion 12d serves as a free end to perform a spring function.

  The bezel 10 in the present embodiment is attached to the leaf spring attachment portion 10g in a state where the cylindrical portion 10m in a state where at least a part of the sensor body 30 is disposed in the hollow portion 10d is inserted into the hole portion 21. The plate spring 12 is elastically compressed and deformed between the hole 21 and the elastic reaction force accompanying the compression deformation acts on the hole 21, the sensor main body 30, and the cylindrical portion 10m. 30 is fixed.

  That is, on the free end side of the leaf spring 12, both the bumper 20 (hole portion 21) and the side surface of the opening surface of the sensor body 30 are in contact with the leaf spring 12. More specifically, as shown in FIG. 11, a part (point P1) between the convex part 12c and the folded part 12d contacts the bumper 20 (the corner of the hole part 21), and a part of the bent part 12e ( The point P2) comes into contact with the sensor body 30, and a part (point P3) of the presser 12f comes into contact with the inner wall of the bezel 10. That is, with respect to the inner walls of the bumper 20 and the bezel 10, the elastic force (elastic reaction force) of the leaf spring 12 is applied to the radially outer side of the bezel 10, and the sensor body 30 (opening surface) is radially inward of the bezel 10. The elastic force (elastic reaction force) of the spring 12 is applied.

  Therefore, in the structure in which the sensor main body 30 is fixed to the bumper 20 via the bezel 10, the bezel 10 can be firmly fixed to the bumper 20, and the sensor main body 30 can be firmly fixed to the bezel 10. It becomes possible. In other words, the bezel 10, the bumper 20, and the sensor body 30 are a part (one point) between the bumper 20, the convex portion 12 c of the leaf spring 12 and the folded portion 12 d, and the bent portion 12 e of the sensor body 30 and the leaf spring 12. A part (one point) is fixed at three points, that is, the holding portion 12f of the leaf spring 12 and the inner wall of the bezel 10. That is, each leaf spring 12 supports the bezel 10, the bumper 20, and the sensor body 30 at three points.

  Further, between the flange 10a and the snap fit 10b in the bezel 10, after the ultrasonic sensor is attached to the bumper 20, a positioning recess 10k (for example, for suppressing rotation of the ultrasonic sensor (bezel 10)). U-shape etc.) are provided. That is, the positioning recess 10k is for suppressing the ultrasonic sensor (bezel 10) from rotating about the central axis of the hole 21 (the central axis of the cylindrical portion of the bezel 10) as the rotation axis. The shape and size of the positioning recess 10k are not limited to the U-shape, and can be set as appropriate depending on the shape and size of the protrusion 22 of the bumper 20, for example.

  As shown in FIG. 6, the ultrasonic sensor mounting portion of the bumper 20 is provided with a hole 21 and a protrusion 22 (for example, a semi-cylindrical shape) protruding from a part of the surface of the hole 21. The shape and size of the protrusion 22 are not limited to a semi-cylindrical shape, and can be set as appropriate.

  The positioning recess 10k is provided with the protrusion 22 of the bumper 20 in a state where the bezel 10 is installed on the bumper 20. Thus, by arrange | positioning the protrusion 22 of the bumper 20 in the positioning recessed part 10k, after attaching an ultrasonic sensor to the bumper 20, it can suppress that an ultrasonic sensor (bezel 10) rotates. The shape and size of the hole 21 are set according to the cylindrical portion of the bezel 10.

  In addition, you may make it provide the protrusion 22 of the bumper 20 in multiple places. That is, when a recess other than the positioning recess 10k is formed around the bezel 10, the protrusion may be formed at a position corresponding to the recess. By doing in this way, after attaching an ultrasonic sensor to the bumper 20, it can suppress further that an ultrasonic sensor (bezel 10) rotates.

  Further, the bezel 10 includes a guide groove 11 (for example, a U-shape) for suppressing a positional shift when the bezel 10 is inserted into the hole 21 of the bumper 20 so as to be assembled to the bumper 20. The guide groove 11 may be provided at a portion where the cylindrical portion and the snap fit 10b intersect. In the present embodiment, the guide groove 11 is provided at a portion between the cylindrical portion of the bezel 10 and the tip portion of the snap fit 10b. That is, it is provided at a portion protruding in the radial direction from the cylindrical portion of the bezel 10. In addition, the shape and size of the guide groove 11 are not limited to the U-shape, and can be appropriately set depending on the shape and size of the protrusion 22 of the bumper 20, for example.

  Further, the removal preventing claws 10e may be provided at positions on both the left and right sides of the bezel 10 (the left and right sides when the snap fit 10b is the front face and the left and right sides in FIG. 2) on the outer peripheral surface of the bezel 10. . The removal preventing claw 10e is provided to prevent the bezel 10 from coming off the bumper 20.

  Here, the assembly of the bezel 10 to the bumper 20 will be described. FIG. 7 is a diagram illustrating a schematic configuration when the bezel 10 is assembled to the bumper 20.

  As described above, the bezel 10 in the present embodiment is provided with the snap fit 10b protruding from the cylindrical portion of the bezel 10 in the radial direction. The shape and size of the hole 21 are set according to the cylindrical portion of the bezel 10. For this reason, when inserting the bezel 10 into the hole 21 of the bumper 20, the cylindrical portion of the bezel 10 can be inserted straight along the hole 21. That is, the center axis of the hole 21 and the center axis of the cylindrical portion of the bezel 10 cannot be inserted together.

  Therefore, when the bezel 10 is inserted into the hole 21 of the bumper 20, first, the snap fit 10b is inserted into the hole 21, as shown in FIG. At this time, the protrusion 22 of the bumper 20 is arranged in the guide groove 11 of the bezel 10. In other words, the guide groove 11 of the bezel 10 is pressed against the protrusion 22 of the bumper 20. At this stage, the bezel-side mounting surface 10a1 of the flange 10a and the bumper-side mounting surface 23 of the bumper 20 are not parallel but are in an inclined positional relationship.

  Thereafter, the cylindrical portion of the bezel 10 is turned into the hole 21 while the bezel 10 is rotated in a direction in which the bezel-side mounting surface 10a1 of the flange 10a and the bumper-side mounting surface 23 of the bumper 20 are parallel to each other (the arrow direction in FIG. 7). insert. At this time, the guide groove 11 of the bezel 10 in which the protrusion 22 of the bumper 20 is inserted is rotated as a fulcrum S. In other words, the portion where the protrusion 22 of the bumper 20 and the guide groove 11 of the bezel 10 are in contact with each other is rotated using the fulcrum S as a fulcrum S. In this way, the bezel 10 is assembled to the bumper 20 as shown in FIG.

  In the state where the bezel 10 is assembled to the bumper 20, the ultrasonic sensor is fixed to the bumper 20 as shown in FIG. 9 by inserting the sensor body 30 into the hollow portion 10 d of the bezel 10. That is, the bezel 10, the bumper 20, and the sensor body 30 are a part (one point) between the bumper 20 and the convex portion 12 c and the folded portion 12 d of the leaf spring 12, and one of the bent portions 12 e of the sensor body 30 and the leaf spring 12. This is fixed at three points: a portion (one point), a pressing portion 12f of the leaf spring 12, and an inner wall of the bezel 10.

  In this manner, by inserting the protrusion 22 of the bumper 20 into the guide groove 11 of the bezel 10, it is possible to suppress backlash and to prevent a position shift from an appropriate position. That is, it is possible to suppress positional deviation in the rotation direction or the like with the central axis of the hole 21 (the central axis of the cylindrical portion of the bezel 10) as the rotation axis.

  Since the bezel 10 is rotated and assembled to the bumper 20 in such a state, the insertion load when the bezel 10 is assembled to the bumper 20 can be reduced and can be easily assembled. Therefore, it is possible to suppress the positional deviation in the state where the bezel 10 is assembled to the bumper 20. That is, it is possible to suppress positional deviation in the rotation direction or the like with the central axis of the hole 21 (the central axis of the cylindrical portion of the bezel 10) as the rotation axis.

  That is, when the guide groove 11 is not provided in the bezel 10 as in the present embodiment, the bezel 10 is easily rattled when the snap fit 10b is inserted and may be displaced from an appropriate position. For example, there is a possibility of being assembled at a position rotated by 90 ° in the rotation direction with the central axis of the hole 21 as the rotation axis from an appropriate position. In addition, in this way, when a positional shift occurs at the stage where the snap fit 10b is inserted, even if the bezel 10 is continuously inserted into the hole 21 while rotating, the insertion load increases or is assembled. May not be possible. Therefore, there is a possibility that a positional deviation occurs when the bezel 10 is assembled to the bumper 20. On the other hand, the bezel 10 of the present invention can solve these problems.

  In addition, although the bezel 10 in this Embodiment demonstrated and employ | adopted the structure by which the snap fit 10b was formed in the cylindrical part, this invention is not limited to this. For example, the object of the present invention can also be achieved by adopting a configuration in which the snap fit 10b protrudes from the elliptical cylindrical shape or the polygonal cylindrical shape of the bezel 10.

  In the present embodiment, the bumper 20 is used as the fixed member. However, the present invention is not limited to this. The present invention can also be applied to the case where the ultrasonic sensor 1 is fixed to vehicle body parts other than the bumper 20.

  In the present embodiment, an example in which the bezel 10 is applied to an ultrasonic sensor has been described. However, the present invention is not limited to this, and the present invention can be applied to other sensors. It can be achieved.

  Here, the position and angle of the leaf spring mounting portion 10g, which is a characteristic part of the present invention, will be described. That is, the attachment position and attachment angle of the leaf spring 12 will be described.

  As described above, the bezel 10 of the present embodiment is fixed in a state where the detection surface (vibration surface) 301 (the opening surface 101 of the bezel 10) of the sensor body 30 is inclined with respect to the bumper 20. That is, the sensor body 30 is fixed to the inclined portion of the bumper 20.

FIG. 13 is an explanatory diagram for explaining the attachment position of the leaf spring in the comparative example. The bezel 100 in FIG. 13 is fixed in a state where the bumper 200 and the detection surface of the sensor body 30 (the opening surface 100l of the bezel 100) are parallel. Accordingly, the leaf springs 102 can be all made of the same shape (the same size) and the same material. In other words,
When the bezel 100 in which the leaf spring 102 is attached to the leaf spring attaching portion evenly arranged in the tubular portion is fixed to the bumper 200, the elastic reaction force applied to the sensor main body, the bezel 100, and the bumper 200 by each leaf spring 102 is approximately. It becomes equivalent.

  On the other hand, as shown in FIG. 12, the bezel 10 according to the present embodiment has an inclined bumper without changing the direction of the detection surface (vibration surface) 30l (opening surface 10l of the bezel 10) of the sensor body 30. The sensor main body 30 is fixed to 20. The bumper 20 is inclined with respect to the detection surface (vibration surface) 301 (the opening surface 10l of the bezel 10) of the sensor main body 30 by an angle formed by the BB line and the DD line. 12 and 13, the BB line is a line parallel to the surface of the bumper 20, the DD line is a line parallel to the vibration surface 30l or the opening surface 10l of the bezel 10, and D′− The D ′ line is a line parallel to the end of the cylindrical portion.

  When the sensor body 30 is fixed to the inclined bumper 20 without changing the direction of the vibration surface of the sensor body (the opening surface 100l of the bezel 100) using the bezel 100 as shown in FIG. The contact point of each leaf spring 102 with the hole 21 of the bumper 20 is different. Therefore, there is a possibility that the elastic reaction force varies among the plurality of leaf springs, and the sensor body 30 cannot be fixed to the bumper 20.

  It is also conceivable to suppress variations in the elastic reaction force in the plurality of leaf springs by making the shapes and materials of the plurality of leaf springs different depending on the positions where they are arranged. However, if the shapes and materials of the plurality of metal springs are made different in this way (in other words, when similar parts are used), it may cause erroneous assembly.

  In addition, in order to use the conventional sensor body 30 even when the vibration surface 30l of the sensor body 30 is tilted with respect to the bumper 20, as described above, The positional relationship needs to keep the conventional positional relationship. That is, the relationship between the DD line and the D′-D ′ line in FIG. 13 and the relationship between the DD line and the D′-D ′ line in FIG.

  Therefore, as shown in FIGS. 10 and 12, the leaf spring mounting portion 10g in the present embodiment is provided at a position provided on the cylindrical portion 10m in the direction perpendicular to the detection surface 30l of the sensor main body 30, and the cylindrical portion 10m. The angle provided in the cylindrical portion 10m in the radial direction is provided so as to vary depending on the distance between the bumper 20 and the vibration surface 30l (opening surface 10l). In other words, the bumper 20 is provided differently according to the distance between the bumper 20 and the vibration surface 30l (opening surface 10l) generated when the vibration surface 30l (opening surface 10l) is inclined with respect to the bumper 20. The interval is the interval between the intersection point of the vibration surface 30l (opening surface 10l) and the bumper 20 that is perpendicular to the vibration surface 301 (opening surface 10l).

  That is, by shifting the position of the leaf spring mounting portion 10g according to the inclination of the bumper 20, and by tilting the leaf spring mounting portion 10g, the positional relationship between all the leaf spring mounting portions 10g and the bumper 20, the leaf spring mounting portion 10g. The contact angle between the leaf spring 12 attached to the bumper 20 and the bumper 20 is adjusted.

  Specifically, as the distance is narrowed, the position is provided so as to be disposed on the bumper 20 (opening surface 10l) side, and the angle is opposite to the bumper 20 (opening surface 10l) side. It is provided so as to open outward in the radial direction of the cylindrical portion 10m. That is, in all the leaf springs 12, the leaf spring mounting portions 10g are provided at positions and angles at which the contact position and the contact angle with the bumper 20 are equal and the elastic reaction force is substantially equal.

  Accordingly, as shown in FIG. 12, the leaf spring 12 (right side of the paper) with the narrower spacing is disposed closer to the bumper 20 (opening surface 101) than the leaf spring 12 (the left side of the paper) with the wider spacing. (C-C line with respect to B'-B 'line). Further, as shown in FIG. 10, the U-shaped portion 12 b of the tubular portion 10 m is formed on the plate spring 12 (right side of the drawing) on the side having a narrower interval than the leaf spring 12 (left side of the drawing) on the side having a large interval. It arrange | positions so that it may open to radial direction outer side (A'-A 'line with respect to an AA line).

  In this way, using a plurality of leaf springs 12 made of the same shape and the same material, a position provided on the cylindrical portion 10m in the direction perpendicular to the vibration surface 30l of the leaf spring attachment portion 10g to which the leaf spring 12 is attached, Further, the elastic reaction force of all the leaf springs 12 is made substantially equal by changing the angle provided in the cylindrical portion 10m in the radial direction of the cylindrical portion 10m according to the interval between the bumper 20 and the vibration surface 30l. Can do. Therefore, erroneous assembly can be suppressed when the vibration surface 30l of the sensor main body 30 is fixed to the bumper 20 in an inclined state. Moreover, productivity and quality can also be improved by suppressing an incorrect assembly | attachment in this way.

It is a perspective view which shows schematic structure of the bezel (plate spring non-mounting | wearing) in embodiment of this invention. It is a side view from the snap fit side which shows schematic structure of the bezel (leaf spring mounting | wearing) in embodiment of this invention. It is a side view from the snap fit side which shows schematic structure of the bezel (leaf spring mounting | wearing) in embodiment of this invention. It is a side view which shows schematic structure of the leaf | plate spring in embodiment of this invention. It is a top view which shows schematic structure of the leaf | plate spring in embodiment of this invention. It is a fragmentary perspective view of the bumper by which the bezel of this invention is assembled | attached. It is a side view which shows schematic structure at the time of assembling the bezel in embodiment of this invention to a bumper. It is a side view which shows schematic structure of the state which assembled | attached the bezel in embodiment of this invention to the bumper. It is a side view which shows schematic structure of the state which attached the sensor main body to the bezel in embodiment of this invention. It is a fragmentary sectional view for demonstrating the attachment angle of the leaf | plate spring in embodiment of this invention. It is a fragmentary sectional view for demonstrating the fixed structure in embodiment of this invention. It is a side view for demonstrating the attachment position of the leaf | plate spring in embodiment of this invention. It is explanatory drawing for demonstrating the attachment position of the leaf | plate spring in a comparative example.

Explanation of symbols

10 bezel, 10a flange, 10a1 bezel side mounting surface, 10b snap fit, 10c claw part, 10d hollow part, 10e slip prevention claw, 10f slit, 10g leaf spring mounting part, 10h through hole, 10i through hole, 10j slit, 10k Positioning concave part, 10l opening surface, 11 guide groove, 12 leaf spring, 12a return part, 12b U-shaped part, 12c convex part, 12d folded part, 12e bent part, 12f holding part, 20 bumper, 21 hole part, 22 protrusion , 23 Bumper side mounting surface, 30 Sensor body

Claims (3)

A cylindrical sensor body having a detection surface at the tip is fixed to a mounted body having a hole, and is a fixing member that fixes the detection surface in an inclined state with respect to the mounted body. And
A plurality of spring members having the same shape and the same material;
An opening is formed on at least one end side to have a hollow portion, and when the sensor main body is fixed to the mounted body, the sensor main body is disposed in a state where at least a part of the sensor main body is disposed in the hollow portion. A cylindrical part to be inserted into the hole,
A plurality of attachment portions to which the spring member is attached, including a through hole provided on a side wall of the cylindrical portion and penetrating to the hollow portion;
In a state where the cylindrical portion in a state where at least a part of the sensor main body is disposed in the hollow portion is inserted into the hole portion, the spring member attached to the attachment portion is between the hole portion and The sensor body is fixed to the attached body by elastically compressively deforming, and an elastic reaction force accompanying the compression deformation acts on the hole portion, the sensor body, and the cylindrical portion,
Wherein the plurality of mounting portions, the fixing member, wherein Rukoto provided to the contact position and contact angle between the hole in the plurality of the spring member becomes equal.   The fixing member according to claim 1, wherein the sensor body includes an ultrasonic transducer, and the detection surface is a vibration surface. Examples the mounting member, a fixing member according to claim 1 or claim 2, characterized that you fix the sensor body relative to the vehicle body part comprising at least a bumper.

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