JP5459508B2 - Retainer for fixing the sensor to the bumper - Google Patents

Description

  The present invention relates to a sensor fixing retainer in an obstacle detection device that is fixed to a bumper of a vehicle and measures the distance between the vehicle and the obstacle. An apparatus for measuring the distance between a vehicle and an obstacle is called “clearance sonar” or the like.

  In the present specification, an obstacle detection apparatus using an ultrasonic sensor will be described. An ultrasonic sensor device (bezelless ultrasonic sensor device) in a form in which an ultrasonic sensor is directly attached to a mounting hole of a vehicle bumper (without a bezel or the like) is a sensor that emits ultrasonic waves and supports it. And a retainer. Here, the sensor is attached such that the microphone surface (ultrasonic emission surface) at the tip thereof is flush with the outer surface of the bumper (see Patent Document 1). As a result, the ultrasonic sensor device becomes inconspicuous, the design is improved, and the directivity of the ultrasonic wave is not hindered.

  Here, the sensor is attached to the inner surface of the bumper while being supported by the retainer. There are bumpers of various thicknesses (2 to 3.4 mm) depending on the vehicle type. However, the conventional retainer of the ultrasonic sensor device uses a dedicated one for the bumper having a specific thickness (in other words, the height of the retainer is constant), and corresponds to a bumper having a different thickness. It was difficult.

  In order to eliminate the above problems, for example, it is conceivable to adjust by interposing a spacer between the retainer and the bumper. However, a plurality of types of spacers must be prepared according to the thickness of the bumper, which increases the number of parts.

JP-T-2001-527480

  In view of the above-described problems, an object of the present invention is to be able to cope with bumpers having different thicknesses by using one type of retainer.

The present invention for solving the above problems is as follows.
An inner surface of the bumper is interposed between the sensor and the bumper so that the front end of the sensor enters an opening or recess that is a sensor installation portion formed in the bumper of the vehicle having a predetermined thickness. A retainer fixed to
The sensor is positioned at a first portion including the tip portion that enters the sensor installation portion from the inner side surface of the bumper, and a portion that is integral with the first portion and that is away from the inner side surface of the bumper from the first portion. A second part,
The retainer includes a sensor support portion that holds the second portion, a plurality of support portions that extend from the sensor support portion toward the inner side surface of the bumper, and a tip end portion of the support portion or a tip of the support portion. Comprising a portion extended to the side and fixed to the inner surface of the bumper,
The sensor support part, the plurality of support parts, and the fixed part so that an angle of a straight line connecting the connection part of the support part with respect to the sensor support part and the fixing part with respect to the thickness direction of the bumper is enlarged or reduced. The distance between the front end of the sensor and the fixed portion in the thickness direction of the bumper is variable based on a change in the angle of the straight line with respect to the thickness direction of the bumper. In the state where the angle is adjusted so that the front end portion of the bumper occupies a certain position regardless of the thickness of the bumper relative to the sensor installation portion of the bumper, the fixed portion is the optimum position on the inner surface of the bumper. By fixing to the bumper, the sensor is fixed to the bumper via the retainer.

  The sensor fixing retainer according to the present invention is configured as described above, and the angle formed by the plurality of support columns with the thickness direction of the bumper changes. Thereby, the distance in the thickness direction of the bumper between the tip portion and the fixed portion of the sensor becomes variable. As a result, the sensor is attached to the bumper so that the tip of the sensor occupies a certain position regardless of the thickness of the bumper. In order to change the angle that the plurality of struts make with the thickness direction of the bumper, the struts can be elastically deformed, or the struts can be pivoted around the connection with the sensor support Is feasible.

  When the front end portion of the sensor is mounted to protrude from the sensor support portion of the retainer toward the bumper side, at least a pair of the post portions are provided so as to sandwich the protruding portion of the sensor. Can do. Thereby, the retainer fixed to the bumper is stably arranged.

  The retainer is made of a resin material, and the sensor support portion, the support column portion, and the fixing portion are integrally provided. Thereby, since the support | pillar part of a retainer can be made flexible, a support | pillar part can be elastically deformed.

  One end of the retainer is rotatably connected to an end of the fixed portion that is not connected to the support column, and the other end extends toward the sensor support, In the side wall portion of the sensor support portion, there can be provided an extending portion that is rotatably connected at an arbitrary position in the thickness direction.

And, on the side wall portion of the sensor support portion, a scale portion corresponding to the thickness of the bumper is provided stepwise in the thickness direction of the bumper,
It is desirable that the other end portion of the extending portion is engaged with and connected to the scale portion.

  A scale corresponding to the thickness of the bumper is provided on the sensor support. This scale portion can quickly respond to changes in the thickness of the bumper.

In addition, the strut portion is provided facing the one made of a flexible material,
By forcibly deflecting the column part from the outside to the inside while leaving the fixed position between the fixed part and the inner side surface of the bumper, the angle formed by the column part and the thickness direction of the bumper is Can be adjusted.

  The U-shaped member sandwiches the opposing struts from the outside, bends them in the direction in which they approach each other, and maintains the bent state, thereby forming the struts and the thickness direction of the bumper. The angle can be adjusted.

Further, the opposing struts are provided with a scale corresponding to the thickness of the bumper in a stepwise manner in their length direction,
The U-shaped member can bend the predetermined scale portion of the support column to bend the support column.

  The sensor transmits a launch wave from the tip surface thereof, receives a reflected wave that hits an obstacle, and measures the distance from the vehicle to the obstacle. As this sensor, an ultrasonic sensor, an electromagnetic wave reflection type sensor, a laser, or the like is assumed.

1 is a perspective view of a state in which an ultrasonic sensor device 101 according to a first embodiment is attached to a bumper 22. FIG. It is a perspective view of the state where sensor 1 and retainer 2 of ultrasonic sensor device 101 were separated. (A) is a top view of the sensor 1, (b) is a front view, and (c) is a bottom view. (A) is a plan view of the retainer 2, (b) is a front view, (c) is a bottom view, and (d) is a side view. 1 is a side view of an ultrasonic sensor device 101 with a part thereof broken. FIG. (A) is a side view when the ultrasonic sensor device 101 of the first embodiment is attached to the bumper 22 having the thickness t1, and (b) and (c) are explanatory diagrams of the operation when being attached to the bumper 28 having the thickness t2. It is. (A), (b) explains the operation when the ultrasonic sensor device 101 of the first embodiment is attached to the bumper 28 having a thickness t2 by rotating the support column 11 and the fixing unit 13 of the retainer 2. FIG. (A) is an explanation of the operation when the ultrasonic sensor device 101 of the first embodiment is attached to the bumper 28 having a thickness t2 by rotating the support column 11 of the retainer 2 and bending the lower half thereof. FIG. 4B is an explanatory view of the operation when the intermediate portion of the support column 11 of the retainer 2 is rotated to be attached to the bumper 28 having a thickness t2. It is action | operation explanatory drawing when attaching the ultrasonic sensor apparatus 102 of 2nd Example to the bumpers 22 and 28. FIG. (A) is a side view of the ultrasonic sensor apparatus 103 of 3rd Example, (b) is a top view similarly. It is operation | movement explanatory drawing of the ultrasonic sensor apparatus 103 of 3rd Example. (A) is a side view when the ultrasonic sensor device 101 of the first embodiment is attached to the step-shaped attachment hole 26 of the bumper 22, and (b) is the ultrasonic wave of the first embodiment in the recess 38. It is a side view when the sensor apparatus 101 is attached.

  Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a perspective view of the ultrasonic sensor device 101 according to the first embodiment attached to the bumper 22, FIG. 2 is a perspective view of the ultrasonic sensor device 101 with the sensor 1 and the retainer 2 separated, and FIG. (a) is a plan view of the sensor 1, (b) is also a front view, (c) is a bottom view, FIG. 4 (a) is a plan view of the retainer 2, (b) is a front view, and (c) is a front view. Similarly, FIG. 5D is a side view, FIG. 5 is a side view of the ultrasonic sensor device 101 with a part broken away.

  The ultrasonic sensor device 101 according to the first embodiment will be described. As shown in FIGS. 1 and 2, the ultrasonic sensor device 101 includes a sensor 1 and a retainer 2 that supports the sensor 1, and the sensor 1 is integrally incorporated in the retainer 2.

  First, the sensor 1 will be described. As shown in FIG. 3, the sensor 1 has a two-stage cylindrical shape with a narrow lower end portion (tip portion 3), a main body portion 4 that emits ultrasonic waves from the tip surface (microphone surface 3 a), and the main body portion 4. And a rectangular parallelepiped housing portion 5 attached integrally to the upper end portion. The size of the housing 5 in plan view is slightly larger than the main body 4 and protrudes around the main body 4. A connection terminal portion 6 for connecting a cable (not shown) is provided on one side surface portion of the housing portion 5. Column-shaped positioning portions 7a, 7b, and 7c for positioning and retaining with respect to the retainer 2 when attached to the retainer 2 are provided on the side surface portion of the housing portion 5 where the connection terminal portion 6 is not provided. It is provided along the height direction of the housing part 5. Among these, the positioning portion 7b provided on the surface opposite to the connection terminal portion 6 is provided slightly shifted from the center portion in the width direction of the side surface portion of the housing portion 5, so that an operator mistakenly detects the sensor. It is prevented that 1 is attached in the opposite direction. In addition, a substantially central portion of the other two side surfaces of the housing portion 5 is engaged with the inner peripheral surface of the retainer 2 when attached to the retainer 2 to prevent the retainer 2 from coming out. Joint protrusions 8 are provided respectively.

  Next, the retainer 2 will be described. As shown in FIG. 4, the retainer 2 is made of a resin material (for example, polybutyne terephthalate), has a square shape in a plan view, and a sensor support portion 9 that fits and supports the housing portion 5 of the sensor 1, and the sensor Two pairs (four in total) of the support pillars 11 and 12 projecting obliquely downward from the peripheral edge of each side of the support part 9, and fixing parts 13 and 14 connected to the tip parts of the support pillars 11 and 12, Is provided. The fixing portions 13 and 14 of each pair are extended from the corresponding column portions 11 and 12 with the same width.

  The sensor support portion 9 includes thin plate-shaped side walls in the height direction from three peripheral portions (three peripheral portions excluding the peripheral portion where the connection terminal portion 6 of the sensor 1 is disposed) in the rectangular plate-shaped bottom surface portion 15. The parts 16a, 16b, and 16c are extended. In addition, the bottom surface portion 15 is provided with a through hole 15a for allowing the tip portion 3 of the sensor 1 to be inserted. Of the three side wall portions 16a, 16b, and 16c, the inner widths of the side wall portions 16a and 16c that are arranged to face each other are slightly wider than the width of the housing portion 5 of the sensor 1, and the sensor 1 An engaged portion 17 that engages each of the engaging projections 8 is provided. Further, groove portions 18a, 18b, 18c for fitting the positioning portions 7a, 7b, 7c of the sensor 1 are provided in the side wall portions 16a, 16b, 16c.

  The housing portion 5 of the sensor 1 is fitted into the three side wall portions 16 a, 16 b, 16 c of the sensor support portion 9. At this time, the main body portion 4 of the sensor 1 is inserted into the through hole 15 a of the bottom surface portion 15 of the sensor support portion 9, and the tip portion 3 projects downward from the sensor support portion 9. Further, the connection terminal portion 6 of the sensor 1 protrudes laterally from the open portion of the sensor support portion 9 (portions where the side wall portions 16a, 16b, 16c are not provided).

  In the case of the retainer 2 of the ultrasonic sensor device 101 of the first embodiment, the width of the pair of support columns 11 is wider than the width of the pair of support columns 12. The retainer 2 is bonded to the back surface (inner side surface 22a) of the bumper 22 by an adhesive member (for example, double-sided tapes 19 and 21) attached to the bottom surface portions of these support columns 11 and 12 (see FIG. 1). At this time, the wide fixing portion 13 serves as a main fixing portion for bonding the retainer 2 and the bumper 22, and the narrow fixing portion 14 serves as an auxiliary fixing portion. Since the structure of the support | pillar parts 11 and 12 and the fixing | fixed parts 13 and 14 is the same except those widths, only the wide support | pillar part 11 and the fixing | fixed part 13 are demonstrated below. In the following drawings, some dimensions may be changed or some members may be omitted for easy explanation.

  As shown in FIG. 5, one end portion of the column portion 11 is integrally formed with the sensor support portion 9. Further, the other end portion of the column portion 11 is integrally formed with the fixed portion 13 through a thin portion 23 having a small thickness. The support 11 is thin and elastically deformable. And the angle (alpha) which the support | pillar part 11 and the thickness direction of the bumper 22 make is variable when the support | pillar part 11 elastically deforms.

  Moreover, the support | pillar part 11 can also be freely rotatable in the direction of arrow P1 in the connection part 24 with the sensor support part 9. FIG. As a result, the angle α formed between the support column 11 and the thickness direction of the bumper 22 can be freely changed. Similarly, the fixed portion 13 can be freely rotatable in the direction of the arrow P2 at the connecting portion 25 with the support column portion 11. This makes it possible to freely change the angle β formed by the support column portion 11 with the fixed portion 13. As described above, when the support column 11 in the retainer 2 is elastically deformable, when the support column 11 is not elastically deformable and is rotatable at the connecting portions 24 and 25, and the support column 11 is elastically deformed. It is possible to consider a case where the connecting portions 24 and 25 can rotate. In the case of the conventional retainer, the support column 11 is difficult to be elastically deformed and is connected to the sensor support unit 9 or the fixed unit 13 so as to be difficult to rotate, and the thickness direction of the fixed support column 11 and the bumper 22 It is difficult to change the angle α formed by and the angle β formed by the support column 11 and the fixed portion 13.

  The operation of the retainer 2 of the ultrasonic sensor device 101 of this embodiment will be described. First, the case where the column part 11 is attached to the bumper 22 having different thicknesses by bending (elastically deforming) the column part 11 will be described. As shown in FIG. 6A, the sensor 1 is attached to the bumper 22 having a thickness of t1 by the retainer 2 of the first embodiment. The microphone surface 3 a of the sensor 1 is disposed flush with the outer surface 22 b of the bumper 22. In this state, an angle formed by the support column 11 and the thickness direction of the bumper 22 is α1, and a distance between the distal ends of the fixed portion 13 is L1.

  Next, using the retainer 2, the sensor 1 is attached to the bumper 28 having a large thickness t2 (t2> t1). As shown in FIG. 6 (b), an assembly jig (stopper 27) is applied to a position corresponding to the mounting hole 26 on the outside of the bumper 28 to close the mounting hole 26. The ultrasonic sensor device 101 is lowered from the inside of the bumper 28 toward the mounting hole 26 of the bumper 28. Since the thickness t <b> 2 of the bumper 28 is thick, the fixing portion 13 contacts the inner side surface 28 a of the bumper 28 before the microphone surface 3 a of the sensor 1 contacts the stopper 27. In other words, a gap e1 is formed between the microphone surface 3a of the sensor 1 and the outer surface 28b of the bumper 28. When the sensor 1 is pushed in and the microphone surface 3a is brought into contact with the stopper 27, as shown in FIG. 6 (c), the pair of column portions 11 of the retainer 2 bend, and the distal end portion of the fixing portion 13 faces outward. Push out. As a result, the distance L2 between the distal ends of the fixing portion 13 is slightly longer than the distance L1 (see FIG. 6A) (L2> L1). In this state, the pair of fixing portions 13 are fixed to the inner side surface 28a of the bumper 28 by the double-sided tape 19 (see FIG. 5), and the ultrasonic sensor device 101 connects the microphone surface 3a of the sensor 1 to the outer side surface of the bumper 28. It is mounted flush with 28b.

  Next, the operation of the retainer 2 will be described in the case where it is attached to the bumpers 22 and 28 having different thicknesses t1 and t2 by rotating the support column portion 11 and the fixing portion 13. As in the case of the first embodiment described above, the retainer 2 attached to the bumper 22 having the thickness t1 (see FIG. 6A) is attached to the bumper 28 having the thick thickness (t2). In the state shown in FIG. 7A, the sensor 1 is pushed in, and the microphone surface 3 a is brought into contact with the stopper 27. Then, the column part 11 of the retainer 2 rotates upward (in the direction approaching the sensor support part 9) around the connection part 24 with the sensor support part 9, and the thickness direction of the column part 11 and the bumper 28 is increased. Is changed to α2 larger than α1 (see FIG. 6A) (α2> α1). For this reason, a pair of support | pillar part 11 is expanded, and the front-end | tip part of the fixing | fixed part 13 is arrange | positioned farther. At the same time, the connecting portion 25 between the column portion 11 and the fixing portion 13 abuts on the inner side surface 28 a of the bumper 28. At this time, the fixing portion 13 is disposed slightly obliquely due to changes in the angles α1 and α2.

  As shown in FIG. 7B, the pair of fixing portions 13 rotate downward (in a direction away from the sensor support portion 9) around the connecting portion 25 with the support column portion 11, and the fixing portion 13 is bumper 28. The ultrasonic sensor device 101 is attached with the microphone surface 3 a of the sensor 1 flush with the outer surface 28 b of the bumper 28. And the distance L3 between the front-end | tip parts of the fixing | fixed part 13 becomes a little longer than the distance L1 (refer (a) of FIG. 6).

  As shown in FIG. 8A, when the ultrasonic sensor device 101 is attached to the bumper 28 having the thickness t2, the upper half portion of the column portion 11 rotates around the connection portion 24 with the sensor support portion 9. (The angle formed between the support column 11 and the thickness direction of the bumper 28 is α3) and the lower half of the support column 11 is bent, so that the ultrasonic sensor device 101 is A configuration may be adopted in which the difference between the thicknesses t1 and t2 of 28 is absorbed.

  The upper rotation center 29 of the pair of support pillars 11 is not provided in the connection part 24 with the sensor support part 9, and for example, as shown in FIG. It may be provided. In this case, the upper half part of the column part 11 is not deformed, and the lower half part of the column part 11 rotates about the rotation center 29 provided in the middle thereof, so that the ultrasonic sensor device 101 is bumper 22. , 28 may be attached by absorbing the difference between the thicknesses t1 and t2.

  Next, the ultrasonic sensor device 102 of the second embodiment will be described. As shown in FIG. 9A, in the sensor support portion 9 of the retainer 2 constituting the ultrasonic sensor device 102 of the second embodiment, the side wall portions of the sensor support portion 9 corresponding to the pair of column portions 11. In the lower part, a notch 30 is provided in a staircase shape so as to project outward as it goes upward. Further, an extending portion 31 is provided from the distal end portion of the fixing portion 13 (the end portion on the opposite side of the connecting portion 24 to the support column portion 11) toward the sensor support portion 9. Similar to the ultrasonic sensor device 101 of the first embodiment, the column portion 11 is rotatable with respect to the sensor support portion 9, and the fixing portion 13 is rotatable with respect to the column portion 11. A state in which the extending portion 31 is rotated is indicated by a two-dot chain line. Further, the extending portion 31 is rotatable around a connecting portion 32 with the fixed portion 13. The distal end portion of the extending portion 31 has an acute angle shape and can be engaged with the notched portion 30.

  In a state where the extended portion 31 is engaged with the notched portion 30, a square 33 is formed by the notched portion 30, the support column portion 11, the fixing portion 13, and the extended portion 31. When the fixing portion 13 in the quadrangle 33 is arranged horizontally, the height H2 from the bottom surface portion of the fixing portion 13 to the microphone surface 3a of the sensor 1 is an engagement position between the notch portion 30 and the extending portion 31. Is uniquely determined by In this state, an angle formed by the support column 11 and the thickness direction of the bumper 22 is α4.

  Then, as shown in FIG. 9B, when the engagement position between the notch portion 30 and the extending portion 31 is moved upward, the connecting portion 32 between the fixing portion 13 and the extending portion 31 accordingly. Also move upward. In this state, when the support column 11 is rotated with respect to the sensor support unit 9 so that the fixed unit 13 is horizontally disposed, the angle α4 formed by the support column 11 and the thickness direction of the bumper 28 changes to α5. . As a result, the height H3 from the bottom surface portion of the fixed portion 13 to the microphone surface 3a of the sensor 1 increases. In other words, the heights H2 and H3 can be changed by changing the engagement position between the notch 30 and the extending portion 31. The heights H2 and H3 correspond to the thicknesses t1 and t2 of the bumpers 22 and 28, respectively.

  Here, a scale 34 for displaying the heights H <b> 2 and H <b> 3 between the bottom surface of the fixed portion 13 and the microphone surface 3 a of the sensor 1 can be provided at each step position of the notch 30. That is, the operator can determine the engagement position between the notch portion 30 and the extending portion 31 in advance according to the thicknesses t1 and t2 of the bumpers 22 and 28. In this case, the ultrasonic sensor device 102 can be attached to the bumpers 22 and 28 as they are, and an effect is obtained that the stopper 27 is unnecessary.

  Next, parts of the ultrasonic sensor device 103 of the third embodiment different from the ultrasonic sensor device 101 of the first embodiment will be described. As shown in FIGS. 10A and 10B, the ultrasonic sensor device 103 according to the third embodiment is provided with a step-like length adjusting unit 35 on the outer part of the pair of support columns 11 in the retainer 2. It has been. And the gauge tool 36 fitted by the length adjustment part 35 in a pair of support | pillar part 11 is provided. The gauge tool 36 is substantially U-shaped in a plan view, and the inner width W is provided corresponding to the distance K between the length adjusting portions 35 in the pair of column portions 11. A plurality of types of gauge devices 36 corresponding to the interval K between the step portions of the length adjusting unit 35 are prepared in advance.

  The operation of the ultrasonic sensor device 103 according to the third embodiment will be described. As shown in FIG. 11A, when the ultrasonic sensor device 103 is attached to the bumper 22, the microphone surface 3a of the sensor 1 is recessed by a slight distance e2 from the outer surface 22b of the bumper 22. think of. At this time, the gauge tool 36 is fitted into one of the step portions of the length adjusting portion 35 from the outside of the pair of support column portions 11. At this time, the gauge tool 36 having an inner width W shorter than the interval K of the retainer 2 is fitted. As shown in (b) of FIG. 11, the pair of support columns 11 are pressed from the outside to the inside by the gauge device 36, bent and bent. By bending the pair of support columns 11, the sensor support 9 is pushed down, and the microphone surface 3 a of the sensor 1 is arranged flush with the outer surface 22 b of the bumper 22. If the pressing amount of the sensor support portion 9 is small (or large), the pressing amount is adjusted by changing the position of the step portion into which the gauge tool 36 is fitted in the length adjusting portion 35. be able to.

  And like the ultrasonic sensor apparatus 102 of 2nd Example, a scale is provided in each step part of the length adjustment part 35, and the deformation | transformation amount when a pair of support | pillar part 11 bends can be described. .

  The ultrasonic sensor device 103 according to the third embodiment has an advantage that the height position of the microphone surface 3 a of the sensor 1 can be adjusted after the retainer 2 is attached to the bumper 22.

  The mounting holes 26 of the bumpers 22 and 28 to which the ultrasonic sensor devices 101 to 103 of the respective embodiments described above are mounted are straight through holes. However, as shown in FIG. 12 (a), a stepped mounting hole 26 may be used. Further, when the sensor 1 is an electromagnetic wave reflection type sensor, the tip surface (the microphone surface 3 a in the case of an ultrasonic sensor) does not need to be exposed on the outer surface 22 b of the bumper 22. For this reason, as shown in FIG. The recess 38 has an advantage that the positioning of the sensor 1 is easy. For this reason, if it is not necessary to consider the positioning of the sensor 1, the form which makes the front end surface of the sensor 1 contact | abut to the inner surface 22a of the bumper 22 may be sufficient.

  INDUSTRIAL APPLICABILITY The present invention can be used as an obstacle detection device in a vehicle, particularly as an obstacle detection device using an ultrasonic sensor.

101-103 Ultrasonic sensor device (obstacle detection device)
1 Sensor 2 Retainer (Retainer for sensor fixing)
3 Sensor tip 4 Body (first part)
5 Case (second part)
9 Sensor support parts 11 and 12 Supporting parts 13 and 14 Fixing parts 22 and 28 Bumpers 22a and 28a Inner side surface 24 Connection part (connection part with respect to sensor support part)
26, 37 Mounting hole (opening)
29 Center of rotation (connection)
30 Notch 31 Extension part 34 Scale 36 Gauge tool (U-shaped member)
38 Recesses P1, P2 Direction in which angle is enlarged / reduced t1, t2 Wall thickness α, α1-α4 angle

Claims (12)

An inner surface of the bumper is interposed between the sensor and the bumper so that the front end of the sensor enters an opening or recess that is a sensor installation portion formed in the bumper of the vehicle having a predetermined thickness. A retainer fixed to
The sensor is positioned at a first portion including the tip portion that enters the sensor installation portion from the inner side surface of the bumper, and a portion that is integral with the first portion and that is away from the inner side surface of the bumper from the first portion. A second part,
The retainer includes a sensor support portion that holds the second portion, a plurality of support portions that extend from the sensor support portion toward the inner side surface of the bumper, and a tip end portion of the support portion or a tip of the support portion. Comprising a portion extended to the side and fixed to the inner surface of the bumper,
The sensor support part, the plurality of support parts, and the fixed part so that an angle of a straight line connecting the connection part of the support part with respect to the sensor support part and the fixing part with respect to the thickness direction of the bumper is enlarged or reduced. The distance between the front end of the sensor and the fixed portion in the thickness direction of the bumper is variable based on a change in the angle of the straight line with respect to the thickness direction of the bumper. In the state where the angle is adjusted so that the front end portion of the bumper occupies a certain position regardless of the thickness of the bumper relative to the sensor installation portion of the bumper, the fixed portion is the optimum position on the inner surface of the bumper. A retainer for fixing a sensor to a bumper, wherein the sensor is fixed to the bumper via the retainer.   The retainer for fixing a sensor to a bumper according to claim 1, wherein an angle formed by the support portion with respect to a thickness direction of the bumper is changed by elastic deformation of the support portion. The plurality of struts are rotatable around a connection part with the sensor support part,
The angle which the said support | pillar part makes with the thickness direction of the said bumper changes, when the said several support | pillar part rotates centering on the connection part with the said sensor support part. Retainer for fixing the sensor to the described bumper. The tip of the sensor is attached to protrude from the sensor support part of the retainer toward the bumper side,
The retainer for fixing a sensor to a bumper according to any one of claims 1 to 3, wherein at least a pair of support columns are provided so as to sandwich the protruding portion of the sensor.   The sensor is fixed to the bumper according to any one of claims 1 to 4, wherein the retainer is made of a resin material, and the sensor support portion, the support column portion, and the fixing portion are integrally provided. Retainer.   One end of the retainer is rotatably connected to an end of the fixed portion that is not connected to the support column, and the other end extends toward the sensor support, The bumper according to any one of claims 1 to 5, wherein an extension portion is provided on the side wall portion of the sensor support portion so as to be rotatably connected at an arbitrary position in the thickness direction thereof. Retainer for fixing the sensor to the head. On the side wall portion of the sensor support portion, a scale portion corresponding to the thickness of the bumper is provided stepwise in the thickness direction of the bumper,
The retainer for fixing a sensor to a bumper according to claim 6, wherein the other end of the extended part is engaged with and connected to the scale part. The struts are provided facing each other with a flexible material,
By forcibly deflecting the column part from the outside to the inside while leaving the fixed position between the fixed part and the inner side surface of the bumper, the angle formed by the column part and the thickness direction of the bumper is The retainer for fixing a sensor to a bumper according to any one of claims 1 to 7, wherein the retainer is fixed.   The angle between the strut portion and the thickness direction of the bumper is made by sandwiching the opposing strut portions from the outside with a U-shaped member, bending them in a direction in which they approach each other, and holding the bent state. The retainer for fixing a sensor to a bumper according to claim 8, wherein the retainer is fixed. The opposing struts are provided with stepped scale portions corresponding to the thickness of the bumper in the length direction thereof,
10. The retainer for fixing a sensor to a bumper according to claim 9, wherein the U-shaped member sandwiches a predetermined scale portion of the column portion to bend the column portion. 11.   The retainer for fixing a sensor to a bumper according to any one of claims 1 to 10, wherein a front end surface of the sensor is attached flush with an outer surface of the bumper.   12. The sensor according to any one of claims 1 to 11, wherein the sensor transmits a emission wave from a front end surface thereof, receives a reflected wave hitting an obstacle, and measures a distance from the vehicle to the obstacle. A retainer for fixing a sensor to a bumper according to claim 1.

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