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DESCRIPTION JP3179895

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DESCRIPTION JP3179895
Abstract: To provide an assembly module of an enclosed ultrasonic sensor that is easy to
assemble. An assembly module of an ultrasonic sensor housed in an ultrasonic sensor housing 1
in which a sensor unit 2 is attached to a bottom plate 11 of the housing 1 and electrically
connected to the sensor unit An intermediate plate 310 made of an insulating material and
having first and second surfaces opposite to each other and facing the bottom plate 11 in the
second surface, and the periphery of the first surface of the intermediate plate 310 A base 31
having a first peripheral wall 311 projecting to the side facing the first surface, and a circuit unit
32 electrically connected to the sensor unit 2 and attached to the intermediate plate 310 And a
cushion unit 33 formed of a cushioning material and attached to the second surface of the base. .
[Selected figure] Figure 1
Ultrasonic sensor assembly module
[0001]
The present invention relates to an ultrasonic sensor, and more particularly to an assembly
module used for the ultrasonic sensor.
[0002]
The ultrasonic sensor is a sensing means that measures the distance between the objects and the
moving speed of the objects by measuring the time from when the emitter emits ultrasonic waves
to when the receiver detects the reflection.
[0003]
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1
As ultrasonic sensors currently used, for example, as described in Patent Document 1, there is a
sealed type in which a vibrator is enclosed in a metal case.
[0004]
The ultrasonic sensor described in Patent Document 1 includes a hollow case 2, a piezoelectric
vibration element 3 incorporated in the hollow case 2, a sound absorbing material 4 disposed
above the piezoelectric vibration element 3, and a sound absorbing material A capacitor 5
disposed above 4, lead wires 6 a and 6 b, and an elastic resin 7 filled in the hollow case.
[0005]
Such an ultrasonic sensor is difficult to assemble because the piezoelectric vibration element 3,
the sound absorbing material 4, the capacitor 5, the lead wires 6a and 6b, etc. must be
incorporated in the limited space of the hollow case.
[0006]
Japanese Patent Application Laid-Open No. 10-257595
[0007]
SUMMARY OF THE INVENTION In view of the above-described conventional problems, the
present invention provides an assembly module of an enclosed ultrasonic sensor that is easy to
assemble.
[0008]
In order to achieve the above object, according to the present invention, a sensor unit for
outputting a sensing signal in response to a received sound wave is housed in the housing of an
ultrasonic sensor attached to the bottom plate of the housing and electrically connected to the
sensor unit An assembly module of an ultrasonic sensor connected to the bottom plate,
comprising flexible material, having opposite first and second sides, the second side being
connected to the bottom plate And a first peripheral wall projecting from the periphery of the
first surface of the intermediate plate to the side facing the first surface, and defining a storage
tank with the first surface. A base formed, the circuit unit electrically connected to the sensor
unit, the circuit unit accommodated in the storage tank, and the cushion material being
transmitted from the sensor unit Be one which is capable of attenuating come vibrations,
provides an assembly module of the ultrasonic sensor, characterized in that it comprises a and a
cushion unit which is attached to the second surface of the base.
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[0009]
In the ultrasonic sensor assembly module, preferably, the locking block is formed to further
protrude from the leading edge of the first peripheral wall and to protrude to the outside of the
first peripheral wall.
[0010]
In the assembly module of the ultrasonic sensor, a cut corresponding to the lead wire is formed
in the cushion unit so that a lead wire electrically connecting the sensor unit and the circuit unit
can be passed, and the intermediate plate Preferably, a notch corresponding to the lead wire is
formed.
[0011]
In the assembly module of the ultrasonic sensor, a second peripheral wall protrudes from a
peripheral edge of the second surface of the intermediate plate to a side facing the second
surface, and at least from a protrusion tip of the second peripheral wall One limiting protrusion
protrudes to the inside of the second peripheral wall, and the second surface, the second
peripheral wall, and each limiting protrusion define a storage space for storing the cushion unit.
Preferably, it is configured to
[0012]
According to the above configuration, since the present invention can attach the circuit unit and
the cushion unit to the base made of the flexible material and then install the circuit unit and the
cushion unit in the housing, it provides the assembly module of the ultrasonic sensor which is
easier to assemble. Can.
[0013]
It is an exploded view of an ultrasonic sensor using assembly module 3 of the present invention.
It is a perspective view of the ultrasonic sensor.
It is a top view of the ultrasonic sensor.
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It is sectional drawing cut along the IV-IV line in FIG.
It is a perspective view of the assembly module 3 of the ultrasonic sensor of this invention.
5 is an exploded view of the assembly module 3. FIG.
It is sectional drawing cut along the VII-VII line in FIG.
3 is a flowchart illustrating a method of manufacturing an ultrasonic sensor according to the
present invention.
It is explanatory drawing which shows the manufacturing method of the ultrasonic sensor of this
invention.
It is explanatory drawing which shows the manufacturing method of the ultrasonic sensor of this
invention.
It is explanatory drawing which shows the manufacturing method of the ultrasonic sensor of this
invention.
[0014]
Hereinafter, preferred embodiments of the present invention will be described in detail with
reference to the drawings.
[0015]
FIG. 1 is an exploded view of an ultrasonic sensor using an ultrasonic sensor assembly module 3
of the present invention, FIG. 2 is a perspective view of the ultrasonic sensor, and FIG. 3 is a plan
view of the ultrasonic sensor. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.
[0016]
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As illustrated, the ultrasonic sensor has a sensor unit 2 that outputs a sensing signal in response
to a received sound wave attached to the upper surface of the bottom plate 11 of the housing 1
and housed in the housing 1, and The assembly module 3 of the ultrasonic sensor is housed in
the housing 1 and electrically connected to the sensor unit 2.
Furthermore, a control line 6 is attached to the assembly module 3 for outputting a signal in
connection with external control means.
[0017]
The housing 1 has a bottom plate 11 and a housing circumferential wall 12 formed to project
upward from the upper surface of the bottom plate 11 in the figure, and the module receiving
space 13 is defined by the bottom plate 11 and the housing circumferential wall 12 .
[0018]
FIG. 5 is a perspective view of the assembly module 3 of the ultrasonic sensor of the present
invention, FIG. 6 is an exploded view of the assembly module 3, and FIG. 7 is a cross-sectional
view thereof.
[0019]
As illustrated, the assembly module 3 housed in the module housing space 13 is formed of a base
31, a circuit unit 32 attached to the base 31, and a cushion unit 33, and the circuit unit 32 is a
lead It is electrically connected to the sensor unit 2 by the wire 4 and is electrically connected to
the housing peripheral wall 12 of the housing 1 by the ground wire 5.
[0020]
The base 31 is made of a flexible material, and has a first surface 310a (upper surface in the
figure) opposite to each other and a second surface 310b (lower surface in the figure). An
intermediate plate 310 facing the bottom plate 11 of the housing 1 at 310b, and a side facing the
first surface 310a from the peripheral edge of the first surface 310a of the intermediate plate
310 and the storage tank 315 together with the first surface 310a. A first peripheral wall 311
defining the two, and two locking blocks 314 which are formed to project further from the tip
end edge of the first peripheral wall 311 and to project to the outside of the first peripheral wall
311; Have.
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[0021]
Further, the housing peripheral wall 12 of the housing 1 is formed with a locking tank 121
capable of receiving the locking block 314 corresponding to the locking block 314, and locking
when the base 31 is incorporated into the housing 1 The block 314 is adapted to be fitted into
the locking tank 121.
[0022]
Furthermore, a second peripheral wall 312 protrudes from the peripheral edge of the second
surface 310b of the intermediate plate 310 to the side facing the second surface 310b, and as
shown in FIG. Four limiting projections 317 are formed so as to project inward of the second
peripheral wall from the projection tip of the peripheral wall 312, and the second surface 310b,
the second peripheral wall 312, and the respective limiting projections 317 define an
accommodation space 313. It is
[0023]
The circuit unit 32 is attached so as to be accommodated in the accommodation tank 315, and
the cushion unit 33 is formed of a cushioning material to damp the vibration transmitted from
the sensor unit 2, and It is attached to the second surface 310 b and accommodated in the
accommodation space 313.
[0024]
Further, a passage hole 321 corresponding to the lead wire 4 is formed in the circuit unit 32 so
that the lead wire 4 for electrically connecting the sensor unit 2 and the circuit unit 32 can be
passed through. A notch 331 corresponding to the lead wire 4 is formed, and a notch 316
corresponding to the lead wire 4 is formed in the intermediate plate 310.
[0025]
Furthermore, the module housing space 13 defined by the bottom plate 11 of the housing 1 and
the housing peripheral wall 12 is filled with an electrically insulating material.
[0026]
Next, FIG. 8 is a flowchart showing a method of manufacturing the ultrasonic sensor according to
the present invention.
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[0027]
As shown in FIG. 8, in the method of manufacturing an ultrasonic sensor according to the present
invention, first, the parts used for the ultrasonic sensor, that is, the housing 1, the sensor unit 2,
the base 31, and the circuit unit 32. And the cushion unit 33 are manufactured (S1).
[0028]
Subsequently, the circuit unit 32 is adhered to the first surface 310a, and the cushion unit 33 is
adhered to the second surface 310b to form the assembly module 3 (S2), as shown in FIG. 9, the
sensor unit 2 is attached to the upper surface of the bottom plate 11 of the housing 1 (S3), one
end of the lead wire 4 is electrically connected to the sensor unit 2 and one end of the grounding
wire 5 is electrically connected to the housing peripheral wall 12 of the housing 1 Connect (S4),
and as shown in FIG. 10, the base 31 (assembly module 3) to which the circuit unit 32 and the
cushion unit 33 are bonded is placed so that the second surface 310b faces the sensor unit 2.
Since it is incorporated in the housing 1 (S5), the other ends of the lead wire 4 and the ground
wire 5 and the control wire 6 are turned as shown in FIG. The unit 32 electrically connected (S6),
filling the housing 1 with an electrically insulating material (S7).
[0029]
According to the above configuration, since the present invention can attach the circuit unit and
the cushion unit to the base made of the flexible material and then install the circuit unit and the
cushion unit in the housing, it provides the assembly module of the ultrasonic sensor which is
easier to assemble. Can.
In particular, since the base is manufactured from a flexible material, the work of connecting the
lead wire electrically connecting the circuit unit and the sensor unit can be performed more
easily.
[0030]
DESCRIPTION OF SYMBOLS 1 housing 11 bottom plate 12 housing peripheral wall 121 locking
tank 13 module accommodation space 2 sensor unit 3 assembly module 31 base 310 middle
plate 310 a first surface 310 b second surface 311 first peripheral wall 312 second peripheral
wall 313 accommodation space 314 Locking block 315 Storage tank 316 Notch 317 Limiting
projection 32 Circuit unit 321 Passing hole 33 Cushioning unit 331 Notch 4 Lead wire 5 Ground
wire 6 Control wire
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