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DESCRIPTION JP2014024437

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DESCRIPTION JP2014024437
An object of the present invention is to provide a distance sensor for a vehicle, in which an
attachment member and a reflection member are integrally formed, and the design can be
prevented from being impaired. An ultrasonic sensor (vehicle distance sensor) includes a sensor
body, a case body and a bezel. The bezel 30 arranges the case body 20 inside the bumper 2
through a cylindrical portion fitted to the opening of the case body 20. The cylindrical portion of
the bezel 30 is integrally provided with a reflective portion 33 that protrudes outward from the
mounting hole 2a of the bumper 2 to change the direction of the signal transmitted from the
sensor main body by reflection. The cylindrical portion and the reflective portion 33 are formed
of a single material that is difficult to visually recognize. The case body 20 has an opening
disposed above or below the vehicle so that a signal is emitted toward the top or bottom of the
vehicle. The reflection unit 33 sends a signal transmitted from the sensor body in a
predetermined direction in the horizontal direction, and sends a reflection signal from an
obstacle in the direction to the sensor body. [Selected figure] Figure 1
Vehicle distance sensor
[0001]
The present invention relates to a vehicle distance sensor used, for example, in an obstacle
detection device for a vehicle.
[0002]
As a distance sensor for vehicles, for example, there is one using an ultrasonic sensor called
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"clearance sonar" to support driving at the time of parking.
A plurality of ultrasonic sensors are provided on each of the front and rear bumpers of the
vehicle, and the distance between the vehicle and the obstacle is detected by detecting the time
until the ultrasonic wave transmitted from each ultrasonic sensor strikes the obstacle and
returns. Measure When the distance becomes smaller than the set value, the driver is notified by
voice or the like. As an example using this ultrasonic sensor, for example, an obstacle detection
device described in Patent Document 1 below is known.
[0003]
In this obstacle detection device, a cylindrical holding portion having a stepped hole is provided
in the opening of the device body, and the ultrasonic sensor is held by the holding portion. A
pivoting body is attached to the holding portion so as to be pivotable about its axis, and a
reflecting member that changes the direction of the signal transmitted from the ultrasonic sensor
by reflection is fixed to the pivoting body. With such a configuration, it is possible to easily
change the transmission direction of the signal from the ultrasonic sensor to the outside by
pivoting the pivoting body around the axis of the holding portion, and it is possible to obtain any
directivity. It becomes.
[0004]
JP-A-4-158289
[0005]
However, in the obstacle detection device described in the above-mentioned Patent Document 1,
in order to include the configuration to change the direction of the signal transmitted from the
ultrasonic sensor by reflection, in order to attach the device body to the vehicle besides the
device body. A plurality of components such as a mounting member, a rotating body, a reflecting
member, a ring, and a screw are required.
Since there are functional restrictions on the rotating body and the like, there is a risk that the
designability may be impaired by being viewed from the outside.
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[0006]
In view of the above problems, the present invention provides a distance sensor for a vehicle that
can prevent the designability from being impaired by integrally forming the mounting member
and the reflecting member using a material that is difficult to visually recognize. It is an issue.
[0007]
The present invention for solving the above problems is a distance sensor for a vehicle which is
attached to a mounting hole of a bumper of the vehicle and can measure a distance from the
vehicle to an obstacle, and transmits a signal to the outside of the vehicle The case body is a
bumper having a sensor body for receiving a reflection signal from an obstacle, a case body for
holding the sensor body at a cylindrical opening, and a cylindrical portion externally fitted to the
opening of the case body. A bezel is disposed inside, and a cylindrical reflector of a form
projecting outward from the mounting hole of the bumper is integrally provided on the
cylindrical portion of the bezel by reflecting the direction of the signal transmitted from the
sensor main body by reflection. In the case body, the opening is disposed above or below the
vehicle so that the signal is emitted from the sensor main body toward the upper or lower
direction of the vehicle, and the reflecting portion horizontally directs the signal transmitted from
the sensor main body One of the predetermined The feed, and wherein the sending the reflected
signal from obstacles in the direction to the sensor body.
[0008]
In the distance sensor for vehicles according to the present invention, the case body is attached
to the mounting hole of the bumper through the cylindrical portion of the bezel, and the
reflecting portion is provided integrally with the cylindrical portion of the bezel.
That is, the bezel has both the function of attaching the case body to the mounting hole of the
bumper and the function of integrally supporting the reflecting portion.
For this reason, it becomes possible to comprise a bezel and a reflection part with a single
material by concentrating both functions in a bezel.
[0009]
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Further, in the distance sensor for a vehicle according to the present invention, the opening is
disposed on or below the vehicle so that the case body transmits a signal from the sensor body
toward the upper or lower direction of the vehicle, and the reflecting portion is A signal emitted
from the sensor body is sent in a predetermined direction out of the horizontal direction, and a
reflection signal from an obstacle in the direction is sent to the sensor body. That is, although it is
not possible to visually recognize the sensor body from the outside, it is possible to configure so
that only the projecting portion of the reflective portion is visually recognized. Therefore, when
the reflective portion is formed of a material of a color that is difficult to visually recognize from
the outside, for example, formed of a transparent resin material or glass, the distance for a
vehicle is provided even when the reflective portion is provided at a visible position Damage to
the design of the entire sensor can be favorably prevented.
[0010]
The perspective view which shows the state which concerns on Example 1 of this invention, and
attached the ultrasonic sensor to the attachment hole of a bumper. (A) is a longitudinal crosssectional view of FIG. (B) is a principal part longitudinal cross-sectional view of FIG. 1 in the
direction different from (A). The disassembled perspective view of FIG. (A) is a rear view of a
vehicle which shows an example which attached the ultrasonic sensor to the bumper. (B) is a side
view of the main part of (A). The disassembled perspective view which concerns on Example 2 of
this invention, and is equivalent to FIG.
[0011]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
[0012]
As shown in FIG. 1 and FIG. 2, the ultrasonic sensor 1 as a distance sensor for a vehicle vibrates a
piezoelectric element 14 to be described later by, for example, a piezoelectric effect to emit an
ultrasonic wave. It is a well known transmission / reception type that converts the vibration of a
sound wave into an electric signal, and is attached to the attachment hole 2 a of the bumper 2.
The ultrasonic sensor 1 is configured to include an ultrasonic transducer 11 and a circuit board
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12 which function as a sensor main body 10, a case body 20 and a bezel 30. In addition, in FIG.1
and FIG.2, the bumper 2 is typically shown as a square-shaped flat plate of predetermined
thickness.
[0013]
The ultrasonic transducer 11 (microphone) is accommodated in the cylindrical opening 21 of the
case 20 through the cylindrical cushion material 13 made of silicone rubber or the like, with the
vibrating surface 11 a exposed. A piezoelectric element 14 having a predetermined natural
frequency is installed inside (on the back side) of the vibrating surface 11 a.
[0014]
When the circuit board 12 is operated to apply a predetermined voltage to the piezoelectric
element 14, the piezoelectric element 14 vibrates to generate an ultrasonic wave. The opening
21 of the case body 20 is disposed such that this ultrasonic wave is transmitted from the
vibrating surface 11 a of the ultrasonic transducer 11 to the outside (upward in the figure). Then,
the ultrasonic transducer 11 receives the ultrasonic wave reflected by the obstacle.
[0015]
The circuit board 12 includes a transmission circuit, a reception circuit, a waveform shaping
circuit, a distance calculation circuit, and a communication circuit. The transmission circuit is a
circuit that transmits an ultrasonic wave, and includes an oscillation circuit and a drive circuit
that drives the piezoelectric element 14.
[0016]
The wave receiving circuit is a circuit that receives a reflected wave based on the emission wave
emitted by the wave transmitting circuit. The waveform shaping circuit is a circuit for adjusting
the detection signal from the wave receiving circuit. The distance calculation circuit is a circuit
that measures the time until the emission wave is reflected and returned based on the waveform
of the reflected wave obtained by the waveform shaping circuit, and calculates the distance to the
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object based on the time . The communication circuit is a circuit that transmits a detection signal
(for example, a serial signal) representing the distance calculated by the distance calculation
circuit to an ECU (electronic control unit).
[0017]
The case body 20 has an opening 21 on the upper surface (upper surface shown in FIG. 3) of a
hollow substantially rectangular parallelepiped main body and a connector 22 on one side of the
main body. It is assembled to the bumper 2 through the bezel 30 which is externally fitted. In the
case 20, as shown in FIG. 2, the remaining hollow portion functions as a moisture-proof material
in a state in which the ultrasonic transducer 11 and the circuit board 12 are accommodated, for
example, silicone resin, urethane resin, etc. ) Is filled.
[0018]
As shown in FIG. 3, engaging convex portions 23 and engaging concave portions 24 are
respectively provided on opposite side surfaces of the case body 20 on the side where the
connector 22 is not provided. The engagement convex portion 23 is in the shape of a rod
extending in the axial direction of the opening 21 and engages with the engagement concave
portion 35 of the bezel 30 described later. Specifically, the engagement convex portion 23 is
integrally connected to the case body 20 via the pair of fulcrum portions 23a, 23a, and the end
of the engagement convex portion 23 is elastically deformed with the fulcrum portions 23a, 23a
as pivots. The provided hook portion 23 b is fitted into and hooked on the engagement recess 35
of the bezel 30.
[0019]
The engagement recess 24 has a substantially U-shape extending substantially parallel to the
upper surface of the main body as a base end in a direction away from the engagement
protrusion 23 and engages with an engagement protrusion 34 of the bezel 30 described later .
Specifically, the hook portion 34a (see FIG. 2) provided at the tip of the engagement convex
portion 34 engages with the elastic deformation with the proximal end side of the engagement
convex portion 34 of the bezel 30 as the pivot. It is inserted into the through hole 24 a of the
joint recess 24 and hooked.
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[0020]
The bezel 30 is made of, for example, a transparent resin, and is integrally formed with a
cylindrical portion 31 having a substantially cylindrical shape and one end of the cylindrical
portion 31 as shown in FIGS. 2 and 3. An annular flange portion 32 in which the diameter is
enlarged relative to the outer diameter, and a reflecting portion 33 erected integrally from one
region of the upper surface of the flange portion 32 are configured.
[0021]
The cylindrical portion 31 has an inner diameter that is slightly larger than the outer diameter of
the opening 21 of the case body 20, and is fitted to the outer periphery of the opening 21.
At a lower portion of the outer peripheral surface of the cylindrical portion 31, an engagement
convex portion 34 having a substantially L shape is integrally formed. The hook portion 34a is
integrally formed at the tip of the engagement convex portion 34, and the hook portion 34a is
inserted into the through hole 24a of the engagement recess 24 of the case body 20 described
above.
[0022]
In addition, an engagement recess 35 is formed in the outer middle portion of the cylindrical
portion 31. The engagement recess 35 is a square hole in a front view, and the hook portion 23 b
of the engagement protrusion 23 of the above-mentioned case body 20 is engaged with the
engagement recess 35.
[0023]
Furthermore, a pair of dropout prevention hook portions 36 are provided at symmetrical
positions across the center, which is an outer middle portion of the cylindrical portion 31 and not
provided with the engagement convex portion 34. In addition, only one side of a pair of
detachment prevention hook part 36 is shown by FIG. The anti-disengagement hook portion 36
is provided from the lower end surface of the flange portion 32 at a position at a distance slightly
larger than the thickness of the bumper 2 or at a distance.
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[0024]
The detachment preventing hook portion 36 can be elastically displaced in the radial direction by
means of the slits 36 a formed on both sides thereof with the connecting portion with the
cylindrical portion 31 as a rotation fulcrum. That is, when the bezel 30 is inserted into the
mounting hole 2 a of the bumper 2, the detachment preventing hook portion 36 is elastically
displaced radially inward with the connection portion as a rotation fulcrum by contact with the
outer peripheral edge of the mounting hole 2 a. After passing through the inner peripheral edge
portion 2a, the connecting portion is elastically restored radially outward with the connection
site as a pivot. By the elastic return, the detachment preventing hook portion 36 is hooked on the
inner peripheral edge portion of the mounting hole 2a, so that the bezel 30 can be prevented
from falling out of the mounting hole 2a.
[0025]
Furthermore, four metal springs 37 are attached to the outer middle portion of the cylindrical
portion 31 at equal intervals of 90 ° around the central axis. The metal spring 37 is formed by
bending a belt-like metal plate into a substantially triangular shape, and as shown in FIG. 2B, the
metal spring 37 is hooked on the inner peripheral edge of the first through hole 31a formed in
the cylindrical portion 31. It extends along the inner wall surface of the cylindrical portion 31
from the part integrally connected with the one end portion 37a and the one end portion 37a
bent in this manner, and along the outer wall surface via the lower end surface, The intermediate
portion 37c gradually moves away from the outer peripheral surface of the cylindrical portion 31
as it goes, and gradually approaches the outer peripheral surface of the cylindrical portion 31 as
it goes to the flange portion 32 with the convex portion 37b farthest from the outer peripheral
surface The second through hole 31b formed in the cylindrical portion 31 from the portion
integrally connected to 37c is folded back in a U shape so as to extend in the opposite direction
to the flange portion 32 and engaged with the outer peripheral surface of the cylindrical portion
31 The other end stopped And a 37d.
[0026]
When the opening 21 of the case body 20 is fitted into the bezel 30 attached to the attachment
hole 2a of the bumper 2, the metal spring 37 has the one end 37a as a fixed end and the other
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end 37d as a free end. Are elastically compressed by the mounting holes 2 a of the bumper 2 and
the opening 21 of the case body 20. Thus, a reaction force is applied to the opening 21 of the
case 20 to press the opening 21 radially inward, and the case 20 is firmly fixed to the mounting
hole 2 a of the bumper 2.
[0027]
The reflecting portion 33 has a substantially hemispherical shape, and is integrally formed with
the flange portion 32 via the support portion 33 b so as to protrude outward from the mounting
hole 2 a of the bumper 2. The reflection unit 33 changes the direction of the signal transmitted
from the ultrasonic transducer 11 by the reflection on the flat reflection surface 33 a having a
circular shape. As shown in FIG. 2, the reflecting surface 33a intersects the axis L1 of the
opening 21 of the case body 20 at an angle (acute angle) of 45 °, for example, and the entire
vibrating surface 11a of the ultrasonic transducer 11 is an axis The size is set to include the
projection plane when projected along the direction of L1.
[0028]
Next, the case where the ultrasonic sensor 1 configured as described above is attached to the
bumper 2 will be described. As shown in FIG. 3, first, the bezel 30 is inserted into the mounting
hole 2 a from the outside of the bumper 2. At this time, the hook portion 36 is inserted until the
hook portion 36 passes over the inner peripheral edge of the mounting hole 2a.
[0029]
By the hook portion 36 being hooked on the inner peripheral edge of the mounting hole 2 a of
the bumper 2, the detachment of the bezel 30 from the bumper 2 is restricted. Further, with the
insertion of the bezel 30 into the mounting hole 2a, the metal spring 37 contacts the peripheral
edge of the mounting hole 2a and is pressed radially inward of the cylindrical portion 31 so that
the cylindrical portion 31 is a metal spring It receives a reaction force corresponding to the
elastic deformation of 37. The bezel 30 is firmly fixed to the bumper 2 by the hook 36 and the
metal spring 37.
[0030]
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When the opening portion 21 of the case body 20 incorporating the ultrasonic transducer 11
and the cushion material 13 is fitted into the cylindrical portion 31 of the bezel 30 from the
inside of the bumper 2 with the bezel 30 attached to the bumper 2 The hook portion 34a of the
engagement convex portion 34 of the bezel 30 engages with the engagement concave portion 24
of the case body 20, and the hook portion 23b of the engagement convex portion 23 of the case
body 20 engages the cylindrical portion 31 of the bezel 30 Engages with recess 35.
[0031]
Then, the other end 37 d of the metal spring 37 is elastically compressed by the mounting hole 2
a of the bumper 2 and the opening 21 of the case body 20.
Thus, the case body 20 is firmly fixed to the bumper 2 via the bezel 30. In a state where the case
body 20 is fixed to the bumper 2 via the bezel 30, the vibrating surface 11 a of the ultrasonic
transducer 11 is disposed flush with the upper surface of the flange portion 32 of the bezel 30.
[0032]
FIG. 4 shows an example in which the ultrasonic sensor 1 is attached to the bumper 2 on the rear
side. In this case, in the case body 20, the opening 21 is disposed downward of the vehicle so
that a signal is emitted from the ultrasonic transducer 11 in the downward direction of the
vehicle. The reflection unit 33 sends the signal transmitted from the ultrasonic transducer 11 to
the rear of the vehicle in the horizontal direction, and sends a reflection signal from an obstacle
behind the signal to the ultrasonic transducer 11.
[0033]
On the other hand, when the ultrasonic sensor 1 is attached to the bumper 2 on the front side,
the case body 20 has the opening 21 of the vehicle so that a signal is transmitted from the
ultrasonic transducer 11 downward in the vehicle. It is placed downward. The reflection unit 33
sends the signal transmitted from the ultrasonic transducer 11 to the front of the vehicle in the
horizontal direction, and sends a reflection signal from an obstacle in front of the signal to the
ultrasonic transducer 11.
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[0034]
As is apparent from the above description, in the first embodiment, the case body 20 of the
ultrasonic sensor 1 is attached to the mounting hole 2 a of the bumper 2 via the bezel 30, and
the reflecting portion 33 is the cylindrical portion 31 of the bezel 30. And the flange portion 32.
That is, the bezel 30 has both the function of attaching the case body 20 to the attachment hole
2 a of the bumper 2 and the function of integrally supporting the reflecting portion 33.
Therefore, by integrating both functions into the bezel 30, the bezel 30 and the reflection portion
33 can be configured of a single material (the first embodiment exemplifies the case of a
transparent resin material).
[0035]
Moreover, in the said Example 1, the ultrasonic transducer | vibrator 11 (vibration surface 11a)
can not be visually recognized from the outside, but it becomes a structure where only the
reflection part 33 of the form which protruded is visually recognized. However, the bezel 30
including the reflection portion 33 is formed of a transparent resin material which is difficult to
visually recognize from the outside. Thereby, even if the reflection portion 33 is visually
recognized, it is possible to well prevent the designability of the ultrasonic sensor 1 from being
impaired.
[0036]
In the first embodiment, the bezel 30 including the reflection portion 33 is formed of a
transparent resin material, but the invention is not limited thereto. For example, the bezel 30 may
be formed of a resin material of the same color as the color of the vehicle body . Also in this case,
it is difficult to visually recognize the reflective portion from the outside, so that even when the
reflective portion is provided, an effect of preventing the designability of the ultrasonic sensor 1
from being impaired can be obtained.
[0037]
In the ultrasonic sensor 1 according to the first embodiment, etc., the bezel 30 including the
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reflection portion 33 is formed of a resin material. Instead of this, for example, as shown in FIG.
5, the bezel 130 including the reflection portion 133 is transparent. It may be made of
transparent glass. In the ultrasonic sensor 1 ′ according to the second embodiment, a blocking
member 140 is provided to block the bezel 130 from coming out of the mounting hole 2 a of the
bumper 2. Since the configuration of the case body 20 is the same as that of the first
embodiment, the corresponding parts are denoted by the same reference numerals and the
description of the case body 20 is omitted.
[0038]
The bezel 130 is made of transparent glass as described above, and its outer shape is integrally
formed on the cylindrical portion 131 having a substantially stepped cylindrical shape and one
end of the cylindrical portion 131, and the outer diameter of the cylindrical portion 131 is It is
configured to include an annular flange portion 132 in which the diameter is relatively enlarged,
and a reflecting portion 133 which is integrally provided from one region of the upper surface of
the flange portion 32.
[0039]
The cylindrical portion 131 has an inner diameter slightly larger than the outer diameter of the
opening 21 of the case body 20, and is fitted to the outer periphery of the opening 21.
A stepped portion 131c is formed in the cylindrical portion 131 at the boundary between the
small diameter portion 131a and the large diameter portion 131b, and the hook portion 23b of
the engagement convex portion 23 of the case body 20 is engaged with the stepped portion
131c. There is.
[0040]
The reflecting portion 133 has a substantially hemispherical shape like the reflecting portion 33
of the first embodiment, and is integral with the flange portion 132 via the support portion 133b
so as to project outward from the mounting hole 2a of the bumper 2 It is formed. The reflection
unit 133 changes the direction of the signal transmitted from the ultrasonic transducer 11 by the
reflection on the flat reflection surface 133a having a circular shape.
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[0041]
The blocking member 140 includes a base portion 141 having a rectangular shape in a plan
view, and a pair of resin springs 142 disposed opposite to each other on the upper surface of the
base portion 141. Each resin spring 142 is formed in a curved shape of a reverse eight-shaped
shape extending away from each other as it goes from the proximal end on the base portion 141
side to the distal end.
[0042]
The base portion 141 is formed with a cutaway portion 141a which is cut out from one side of
the rectangle to the central region. The width dimension of the notched portion 141 a is slightly
larger than the outer diameter of the small diameter portion 131 a of the cylindrical portion 131
and slightly smaller than the outer diameter of the large diameter portion 131 b, and the small
diameter portion 131 a of the cylindrical portion 131 Is slidably engageable with the notch 141
a of the base 141.
[0043]
In this case, the notch portion 141a of the base portion 141 is bent on the bezel 130 inserted in
the mounting hole 2a of the bumper 2 by causing each resin spring 142 to contact the back
surface of the bumper 2 and bend it by a predetermined amount. Corresponds to the formation
position of the small diameter portion 131 a of the cylindrical portion 131. That is, the base
portion 141 sandwiches the small diameter portion 131a in the notch portion 141a, and the
lower end edge of the notch portion 141a engages with the step portion 131c of the cylinder
portion 131 to elastically return according to the bending amount of each resin spring 142 The
bezel 130 is pulled into the bumper 2 by force. The blocking member 140 functions as the
blocking means of the present invention, and each resin spring 142 functions as the biasing
portion of the present invention.
[0044]
Next, the case where the ultrasonic sensor 1 'configured as described above is attached to the
bumper 2 will be described. As shown in FIG. 5, first, the bezel 130 is inserted into the mounting
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hole 2 a from the outside of the bumper 2. With respect to the bezel 130, a direction L2 (a
diameter of the cylindrical portion 131 is orthogonal to the axial direction L1 of the cylindrical
portion 131 so that the notch portion 141a of the base portion 141 sandwiches the small
diameter portion 131a of the cylindrical portion 131). Direction). At this time, each resin spring
142 is in a bent state in contact with the back surface of the bumper 2, and the lower end edge
of the notch 141a engages with the step 131c of the cylindrical portion 131 to make the bezel
130 inside the bumper 2. Energize toward. The bezel 130 is firmly fixed to the bumper 2 by the
flange portion 132 being locked to the surface of the bumper 2.
[0045]
With the bezel 130 attached to the bumper 2 via the base member 140, the opening 21 of the
case body 20 incorporating the ultrasonic transducer 11 and the cushion material 13 can be
inserted into the cylindrical portion of the bezel 130 from the inside of the bumper 2. When
fitted in 131, the hook portion 23b of the engagement convex portion 23 of the case body 20
engages with the step portion 131c of the cylindrical portion 131 of the bezel 130.
[0046]
Thus, the case body 20 is firmly fixed to the bumper 2 via the bezel 130 and the base member
140.
In a state in which the case body 20 is fixed to the bumper 2 via the bezel 130, the vibrating
surface 11 a of the ultrasonic transducer 11 is disposed flush with the upper surface of the
flange portion 132 of the bezel 130.
[0047]
In the second embodiment, the blocking member 140 together with the bezel 130 has a function
of attaching the case body 20 to the mounting hole 2 a of the bumper 2, and the bezel 130 has a
function of integrally supporting the reflecting portion 133. For this reason, also in this second
embodiment, both functions can be associated with the bezel 30 and aggregated, and the bezel
130 and the reflecting portion 133 can be made of a single material (the above second
embodiment exemplifies the case of transparent glass) Can be composed of
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[0048]
In addition, although the said Example 2 is especially suitable when the bezel 130 is made of
glass, it may not necessarily be made of glass but may be made of resin.
[0049]
In the above-described first and second embodiments, the case where the ultrasonic sensors 1
and 1 'are attached to the rear and / or front bumpers 2 has been described.
That is, in the case body 20, the opening 21 is disposed downward of the vehicle so that a signal
is transmitted from the ultrasonic transducer 11 toward the lower direction of the vehicle, and
the reflecting portion 33, 133 is the ultrasonic transducer 11. Are sent to the rear of the vehicle
(in front of the vehicle) in the horizontal direction, and a reflection signal from an obstacle
behind (in front of) the vehicle is sent to the ultrasonic transducer 11.
[0050]
However, it is also possible to attach ultrasonic sensors 1 and 1 'not only to this but to parts
other than bumper 2, for example, the ceiling of vehicles. In this case, in the case body 20, the
opening 21 is disposed upward of the vehicle so that a signal is transmitted from the ultrasonic
transducer 11 toward the upper direction of the vehicle, and the reflecting portions 33 and 133
are ultrasonic transducer A signal transmitted from 11 is sent to the front, back or side of the
vehicle in the horizontal direction, and a reflected signal from an obstacle in that direction is sent
to the ultrasonic transducer 11.
[0051]
Moreover, although the ultrasonic sensor which is an example of the distance sensor for vehicles
was demonstrated in the said Example 1, 2, the sensor which measures distance using light,
electromagnetic waves, etc. may be sufficient.
[0052]
1, 1 'Ultrasonic sensor (distance sensor for vehicle) 2 bumper 2a mounting hole 10 sensor main
body 11 ultrasonic transducer 12 circuit board 20 case body 21 opening 30, 130 bezel 31, 131
tube portion 32, 132 flange portion 33 , 133 Reflecting portion 33a, 133a Reflecting surface
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33b, 133b Supporting portion 140 Blocking member (blocking means) 141 Base portion 142
Resin spring (biasing portion)
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