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DESCRIPTION JP2003009270

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DESCRIPTION JP2003009270
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
ultrasonic obstacle detection apparatus mounted on a bumper or the like of a car and a method
of assembling the same.
[0002]
2. Description of the Related Art FIG. 16 is a side view showing a conventional ultrasonic obstacle
detecting apparatus, FIG. 17 is a front view of FIG. 16, and FIG. 18 is a sectional view taken along
line A-A of FIG. 19 is a rear end view of FIG. 16, FIG. 20 is an exploded side view of FIG. 16, and
FIG. 21 is a plan view of a state in which the case lid in FIG. 20 is opened. In the figure, reference
numeral 1 denotes a sensor case, and 2 denotes a case lid of the sensor case 1. The case lid 2 is
connected to one side edge of the open end of the sensor case 1. An engagement claw 3 is
integrally formed on the case outer wall along the other side edge of the open end of the sensor
case 1, 4 is provided on the free end side of the case lid 2, and is engaged with the engagement
claw 3. An engagement hole 5 to be fitted and engaged is an ultrasonic sensor whose outer
periphery is partially fitted to the front end portion of the sensor case 1 via an elastic sensor
holder 6. The ultrasonic sensor 5 is a case lid By closing 2, the case lid 2 and the sensor case 1
are held in pressure.
[0003]
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In FIGS. 18 and 21, 7 is a circuit board electrically connected to the ultrasonic sensor 5 and
housed and set in the sensor case 1, and 8 is connected to the circuit board 7 and led to the
outside. The external lead-out connector 9 is connected to the lead-out end of the connector lead
wire 8 as shown in FIG. A cap 10 is engaged with and engaged with the front end of the sensor
case 1 with the case lid 2 closed, and the cap 10 covers the outer periphery of the front end of
the sensor holder 6 and holds the ultrasonic sensor 5 And integrally has an outward facing
flange 10a at the front end.
[0004]
Reference numeral 11 denotes a leaf spring assembled to the sensor case 1. The leaf spring 11 is
a mounting hole 11a for press-fitting into a projection 1a provided on the rear end face of the
sensor case 1 (see FIG. 19). A plurality of (four in the drawing) arm pieces 11c extending from
the seat plate portion 11b along the outer walls of the sensor case 1 and the case lid 2 to the
vicinity of the outward flange 10a of the cap 10). And a bent portion 11d sandwiching a hole
edge portion of a sensor attachment hole (not shown) provided in a bumper of a vehicle with the
outward flange 10a of the cap on the tip end side of the arm piece 11c. It is provided. The middle
portions of the arm pieces 11c are engaged with the outer wall portions of the sensor case 1 and
the case lid 2, respectively, and the engaging portions are indicated by reference numeral 11e.
[0005]
The assembly will now be described. First, the case lid 2 is opened, and the sensor holder 6 into
which the ultrasonic sensor 5 is fitted is fitted to the tip of the sensor case 1 and the circuit
board 7 electrically connected to the ultrasonic sensor 5 by the lead wire. Are set and stored in
the sensor case 1 from the direction orthogonal to the axial direction of the ultrasonic sensor 5,
and the case lid 2 is closed in a state where the connector lead wire 8 connected to the circuit
board 7 is drawn out. The ultrasonic sensor 5 is held between the sensor case 1 and the case lid
2 via the sensor holder 6 by engaging and engaging the engaging hole 4 of the case lid 2 with
the engaging claw 3 of the sensor case 1.
[0006]
Subsequently, the cap 10 is press-fit engaged with the front end portion of the sensor case 1
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including the case lid 2 via the outer peripheral edge portion of the sensor holder 6, and the
ultrasonic sensor 5 is held by the cap 10. Thereafter, the mounting hole 11a of the seat plate
portion 11b of the plate spring 11 is press-fit into the projection 1a at the rear end of the sensor
case 1, and the intermediate engagement portion 11e of each arm piece 11c of the plate spring
11 is used as the sensor case 1 and case lid. Engage the outer wall of 2.
[0007]
As described above, the ultrasonic obstacle detection device is assembled, and after the assembly,
the ultrasonic obstacle detection is carried out by injection filling from the mold opening 2a (see
FIG. 21) provided in the case lid 2. The device is completed. When attaching this ultrasonic
obstacle detection device to a bumper of a vehicle, the sensor case 1 including the case lid 2 is
inserted into the sensor attachment hole provided in the bumper together with the connector
lead 8 from the rear end side. At the time of the insertion, the bent portion 11d side of the arm
piece 11c is elastically deformed inward at the hole edge portion of the sensor mounting hole.
Then, when the outward flange 10a of the cap 10 abuts against the front surface of the bumper
and the bent portion 11d passes through the sensor mounting hole, the bent portion 11d
elastically restores, whereby the outside of the bent portion 11d and the cap 10 The hole edge of
the sensor mounting hole of the bumper is sandwiched between the facing flange 10a. Thus, the
ultrasonic obstacle detection device is attached and set to the bumper of the vehicle.
[0008]
Since the conventional ultrasonic obstacle detection apparatus is configured as described above,
the case lid 2 is opened and the ultrasonic sensor 5 is applied to the inside of the front end side
of the sensor case. If the case lid 2 is closed and the engaging hole 4 of the case lid 2 is not
engaged with and engaged with the engaging claw 3 of the sensor case 1 after inserting the
sensor holder 6 in which The sensor case can not be assembled to the sensor case 1 and the cap
10 only for contacting the front surface of the bumper is in sliding contact with the outer
peripheral edge portion of the sensor holder 6 from the front of the sensor holder 6 1 and the
outer wall portion of the case lid 2 must be press-fit engaged, which results in a large number of
operation steps and complicated assembly of the ultrasonic sensor 5 and the cap 10, resulting in
a problem of poor operation efficiency. Was Tsu.
[0009]
Further, even the leaf spring 11 has only the attaching function of the ultrasonic obstacle
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detecting device to the bumper of the vehicle, and the leaf spring 11 has its seat when assembled
to the sensor case 1 The mounting hole 11a of the plate portion 11b is pressed into the
projection 1a at the rear end of the sensor case 1 in the axial direction, and the middle engaging
portion 11e of each arm piece 11c is engaged with the outer wall of the sensor case 1 and the
case lid 2 As a result, there is a problem that the assembly of the plate spring 11 takes a lot of
work and the working efficiency is further deteriorated.
Furthermore, the sensor holder 6, the circuit board 7, the cap 10, and the flat spring 11 have
different assembly directions with respect to the sensor case 1. was there.
[0010]
The present invention has been made to solve the above-mentioned problems, and a single plate
spring can easily integrate the sensor case and the cap, and also has the function of assembling
and fixing the vehicle bumper or the like. It is an object of the present invention to obtain an
ultrasonic obstacle detection device capable of exerting
[0011]
Another object of the present invention is to provide an ultrasonic obstacle detection apparatus
in which the shape of a leaf spring is simplified and the leaf spring can be easily assembled
across the sensor case and the cap.
[0012]
Another object of the present invention is to provide an ultrasonic obstacle detection apparatus
capable of stably and firmly assembling a leaf spring to a sensor case and a cap.
[0013]
Another object of the present invention is to provide an ultrasonic obstacle detection apparatus
capable of easily and reliably positioning the cap at the position where it is fitted to the sensor
case.
[0014]
Another object of the present invention is to provide an ultrasonic obstacle detection apparatus
capable of easily injecting a mold resin into the interior of the sensor case and the cap.
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[0015]
Another object of the present invention is to provide an ultrasonic obstacle detecting apparatus
which can omit the connector lead wire external connector with a separate part, thereby
improving the workability and reducing the cost. Do.
[0016]
Another object of the present invention is to provide an ultrasonic obstacle detection device
which can be mounted on a vehicle having no depth at a sensor mounting portion such as a
bumper.
[0017]
Still another object of the present invention is to obtain an ultrasonic obstacle detection device
which can ensure the waterproofness of the connector terminal insertion portion without
requiring a separate part such as seal rubber, and can reduce the material cost. I assume.
[0018]
Another object of the present invention is to provide an ultrasonic obstacle detection apparatus
capable of securing the strength of the connector terminal insertion portion.
[0019]
Further, according to the present invention, there is provided an ultrasonic obstacle detecting
device capable of preventing the sensor case from being affected by heat when soldering a
connector terminal to a circuit board, and also capable of preventing the transfer of heat of the
solder. The purpose is to get.
[0020]
Another object of the present invention is to provide an ultrasonic obstacle detection apparatus
in which the connector for external connection is unlikely to be affected by the heat when
soldering the connector terminal to the circuit board.
[0021]
Another object of the present invention is to provide a method of assembling an ultrasonic
obstacle detection apparatus which can improve the workability by setting the assembling
direction of the apparatus components to one direction.
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[0022]
In the ultrasonic obstacle detection device according to the present invention, a sensor mounting
body having an outward facing flange is integrally formed at the front, and an ultrasonic sensor
is mounted on the sensor mounting body. , A circuit board electrically connected to the ultrasonic
sensor and housed in the sensor case, a cap fitted in the opening of the sensor case, and fitted on
the outside of the sensor case And a flat spring which engages with the cap, holds both the
sensor case and the cap and fixes them integrally, and the flat spring is provided with the sensor
between the outward facing flange of the sensor attachment barrel and the flat spring. The elastic
engagement piece part which pinches the hole peripheral wall of an attaching part is integrally
formed.
[0023]
The plate spring of the ultrasonic obstacle detecting device according to the present invention
has a leg portion on both sides and a substantially U-shaped spring body portion fitted to the
outside of the sensor case, and the leg portion. And an arm-like elastic engagement piece which
can be elastically deformed in a relative direction extending forward from each of the leg pieces,
and bent on the tip side of these elastic engagement pieces And the bending engagement portion
sandwiching the hole peripheral wall of the sensor mounting portion of the vehicle between the
outward facing flange of the sensor mounting body portion of the sensor case, and the outer wall
portions on both sides of the cap An engagement claw is provided for engaging and engaging the
engagement hole.
[0024]
The plate spring of the ultrasonic obstacle detecting device according to the present invention
comprises an intermediate piece extending forward from the spring body between the leg pieces
on both sides, and an engagement hole provided in the intermediate piece. And an engagement
protrusion for fitting in and engaging the engagement hole is integrally formed on the outer wall
portion of the sensor case.
[0025]
In the ultrasonic obstacle detecting device according to the present invention, the uneven fitting
portion is formed on the joint surface between the opening end of the sensor case and the cap.
[0026]
In the ultrasonic obstacle detection device according to the present invention, mold resin is filled
in the inside of the sensor case and the cap.
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[0027]
In the ultrasonic obstacle detecting device according to the present invention, the cap is provided
with an opening for injection of the mold resin.
[0028]
The ultrasonic obstacle detection apparatus according to the present invention is an apparatus in
which an external connection connector is integrally provided on a cap.
[0029]
In the ultrasonic obstacle detecting device according to the present invention, the connector for
external connection is integrally provided on the cap in the direction substantially orthogonal to
the axial direction of the ultrasonic sensor.
[0030]
The connector for external connection of the ultrasonic obstacle detection device according to
the present invention is obtained by pulling out the connector terminal from the cap.
[0031]
The connector terminal of the ultrasonic obstacle detection device according to the present
invention is inserted into the terminal insertion hole provided in the cap, and by the insertion, the
connector terminal and the terminal insertion hole are engaged with each other in a hooked
manner. It is the
[0032]
In the ultrasonic obstacle detecting device according to the present invention, the inner wall
portion of the cap is provided with a recessed groove surrounding the periphery of the terminal
insertion hole.
[0033]
The connector terminal of the ultrasonic obstacle detecting device according to the present
invention is provided with a heat blocking hole at the root portion mounted on the circuit board.
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[0034]
According to the method of assembling an ultrasonic obstacle detection device according to the
present invention, the first step of inserting the connector terminal into the terminal insertion
hole provided in the cap to be fitted in the sensor case, and the circuit after the terminal
insertion. A second step of fitting the sensor case to the cap in the plug insertion direction while
inserting and soldering a board into a terminal and housing it in the sensor case, and a leaf
spring after fitting the sensor case to the sensor case And a third step of fitting in the terminal
inserting direction and engaging with the cap.
[0035]
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present
invention will be described.
Embodiment 1
1 is a side view of an ultrasonic obstacle detection apparatus according to a first embodiment of
the present invention, FIG. 2 is a rear view of a partially cutaway view of FIG. 1, FIG. 3 is an
exploded perspective view of FIG. 5, FIG. 5 is a front view of FIG. 4, FIG. 6 is a bottom view of FIG.
5, FIG. 7 is a cross-sectional view of the ultrasonic obstacle detection device of FIG. FIG. 9 is an
enlarged cross-sectional view taken along the line D-D of FIG. 1, and FIG. 10 is an enlarged view
of a portion B of FIG.
In the figure, 20 is a sensor case made of hard resin formed in a substantially concave shape in
cross section, 21 is a sensor mounting body integrally formed at the tip of the sensor case 20,
and this sensor mounting body 21 has a front circular shape A sensor housing recess is formed,
and an outward facing flange 22 is integrally formed on the front end opening peripheral edge
portion of the sensor mounting body portion 21.
[0036]
A plurality of ribs 23 are integrally formed on the outer peripheral wall of the sensor mounting
body 21 at regular intervals in the circumferential direction, and 24 is a sensor holder 25 (FIGS.
3 and 7) in the sensor mounting body 21. Reference numeral 26 is a lead wire connected to the
ultrasonic sensor 24, and 27 is a circuit board electrically connected to the ultrasonic sensor 24
by the lead wire 26. The circuit board 27 is accommodated in the sensor case 20.
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[0037]
In FIG. 3, FIG. 7 and FIG. 8, reference numeral 28 denotes an engagement protrusion for leaf
spring engagement integrally formed in the vicinity of the sensor mounting body 21 in the back
wall of the sensor case 20; The fitting groove 29 is a fitting groove formed at the open end of the
cap 30. The fitting groove 29 is for fitting the opening side edge of the cap 30 described later.
[0038]
A cap 30 is fitted on the open end of the sensor case 20, and the cap 30 is formed substantially
in the shape of a plate as shown in FIG. By being fitted to the position 29, the fitted position of
the cap 30 with respect to the sensor case 20 is positioned.
An external connection connector 31 integrally formed on one side of the cap 30 is formed in a
direction perpendicular to the axial direction of the ultrasonic sensor 24 with respect to the cap
30.
Therefore, the entire shape of the cap 30 including the connector 31 for external connection is
formed in a side surface substantially L-shape.
[0039]
In FIG. 8, reference numeral 32 denotes a terminal insertion hole provided in the boundary wall
between the cap 30 and the connector 31 for external connection, and 33 denotes a pair of
connector terminals 33a inserted into the terminal insertion hole 32. A wide portion formed on
the base side of the connector terminal 33 on the circuit board 27 side, and a heat blocking hole
33b provided in the wide portion 33a.
Here, at the insertion portion of the terminal insertion hole 32 in the connector terminal 33, as
shown in FIG. 8 (b), a hook-like claw portion 33c is integrally formed.
Accordingly, the connector terminal 33 is prevented from coming off once inserted into the
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terminal insertion hole 32.
[0040]
Denoted at 34 is a recessed groove formed around the terminal insertion hole 32 in the back
surface of the external connection connector 31 of the cap 30, and this recessed groove 34 is to
be a mold reservoir. It functions to prevent the mold resin from reaching the contact portion.
The reference numeral 35 denotes an opening for molding resin injection provided in the cap 30,
and the reference numeral 36 denotes an engaging claw of a plate spring system integrally
formed on both side walls of the cap 30.
[0041]
Reference numeral 40 denotes a leaf spring for integrally fixing the sensor case 20 and the cap
30 in a combined state, and this leaf spring 40 has a spring body 41 having leg portions 42 on
both sides, and the leg pieces An engaging hole 43 provided in each of the portions 42 for
engaging with and engaging with the engaging claws 36 of the cap 30, and an arm shape
extending forward from each of the leg pieces 42 and being elastically deformable in a relative
direction Of the two elastic engagement pieces 44, a bending part 45 bent on the tip side of the
elastic engagement pieces 44, and an intermediate piece provided in the middle of the spring
body 41 and extending forward. It has an integral leaf spring structure having a portion 46 and
an engagement hole 47 provided on the intermediate piece 46 and engaged with the engagement
projection 28 of the sensor case 20.
[0042]
Next, the assembly will be described. First, the connector terminal 33 is inserted into the terminal
insertion hole 32 of the cap 30 (first step).
By the insertion, the hook-like claws 33c of the connector terminal 33 are locked in the terminal
insertion hole 32, and the connector terminal 33 is firmly fixed.
Next, the circuit board 27 is inserted into the connector terminal 33 and soldered, and the sensor
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case 20 is fitted to the cap 30 in the insertion direction of the connector terminal 33 while being
accommodated in the sensor case 20 (second Process).
In this case, by fitting the fitting groove 29 of the sensor case 20 to the open end of the cap 30,
the position where the cap 30 is fitted to the sensor case 20 can be easily and accurately
positioned.
In this state, the plate spring 40 is fitted to the sensor case 20 from the outside of the sensor
case 20 in the insertion direction of the connector terminal 33, whereby the engagement hole 47
of the intermediate piece 46 of the plate spring 40 is inserted into the sensor case 20. The
engaging hole 43 of the leg portion 42 is engaged with and engaged with the engaging claw 36
of the cap 30 at the same time as the engaging protrusion 28 is engaged (third step).
In this case, if the leg 42 side of the plate spring 40 inserted into the sensor case 20 is strongly
pressed, the engagement hole 43 of the leg 42 is inevitably inserted into the engagement claw
36 of the cap 30. Be done.
[0043]
Thereafter, mold resin is filled into the sensor case 20 and the inside of the cap 30 from the
opening 35 of the cap 30.
In this case, a wall is formed on the circuit board 27 by the wide portions 33 a of the connector
terminals 33, so that air is well vented and the mold resin smoothly wraps around the back side
of the circuit board 27.
In addition, since the heat is blocked by the heat blocking hole 33b of the wide portion 33a, the
external connection connector 31 is not melted by heat when the circuit board 27 is soldered to
the connector terminal 33.
Furthermore, the concave groove 34 surrounding the terminal insertion hole 32 on the back
surface of the external connection connector 31 prevents the mold resin from adhering to the
contact portion of the connector terminal 33.
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[0044]
In the ultrasonic obstacle detection apparatus assembled as described above, the sensor case 20
including the cap 30 is fitted into the sensor mounting hole such as the bumper of the vehicle
from the rear end side.
In this case, the elastic engagement piece 44 of the plate spring 40 is elastically deformed toward
the sensor attachment body 21 of the sensor case 20 until the bent portion 45 of the plate spring
40 passes through the sensor attachment hole. When the bending portion 45 passes through the
sensor mounting hole of the vehicle, the elastic engagement piece 44 elastically restores, and the
bending portion 45 of the elastic engagement piece 44 and the outward flange 22 of the sensor
case 20 The peripheral wall portion of the sensor mounting hole of the vehicle is sandwiched.
Thus, the attachment of the ultrasonic obstacle detection device to the bumper or the like of the
vehicle is completed.
[0045]
As described above, according to the present invention, the outer side of the sensor case is fitted
with the cap attached to the sensor case integrally having the sensor mounting body to which the
ultrasonic sensor is fitted. By fitting a plate spring to the plate and engaging the plate spring with
the cap, both the sensor case and the cap are held and integrated by the plate spring, and the
plate spring is made of the sensor mounting body portion. Since the elastic engagement piece
that sandwiches the hole peripheral edge of the sensor mounting hole of the vehicle between the
outward facing flange and the outward flange is integrally formed, the sensor case and the cap
can be easily integrated by one leaf spring. As a result, there is an effect that the mounting and
fixing function to the bumper etc. of the vehicle can be exhibited.
[0046]
According to the present invention, the substantially U-shaped spring body having the leg
portions on both sides and fitted to the outside of the sensor case, and the engagement holes
provided in each of the leg portions. Arm-shaped elastic engagement pieces that extend forward
from each of the leg pieces and can be elastically deformed in the relative direction, and are
formed bent at the tip side of these elastic engagement pieces so that the sensor mounting body
of the sensor case And an outward facing flange and a bending engaging portion for sandwiching
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a peripheral wall of a hole of a sensor mounting portion of a vehicle, and fitting engagement
holes of the leg portion to outer wall portions on both sides of a cap The leaf spring is formed so
as to form a leaf spring provided with the engagement claws, so that the leaf spring is simple,
and the leaf spring is fitted to the sensor case so that the sensor case is held by the both leg
portions of the leaf spring. Only by inserting and pressing, the engagement of the leg parts on
both sides of the leaf spring There is an effect that can be brought into easily and reliably
engaging the holes to engaging claws of the cap.
[0047]
According to the present invention, an intermediate piece extending forward from the spring
body is formed in the intermediate part of the leaf spring, and an engagement hole provided in
the intermediate piece is integrally formed on the outer wall of the sensor case. Since it is
configured to be fitted into and engaged with the mating projection, the plate spring can be
stably assembled across both the sensor case and the cap, and the assembling strength can be
sufficiently secured.
[0048]
According to the present invention, since the concavo-convex fitting portion is formed on the
joint surface of the sensor case and the cap, the position at which the cap is fitted to the sensor
case can be easily and accurately positioned. The work of assembling the spring can be easily
performed to improve the workability, and the assembling strength of the sensor case and the
cap can be further increased.
[0049]
According to the present invention, since the mold resin is filled in the inside of the sensor case
and the cap, there is an effect that waterproofness can be obtained.
[0050]
According to the present invention, since the cap is provided with the opening for injection of the
mold resin, the mold resin can be easily injected after the sensor case, the cap and the plate
spring are assembled and integrated. It has the effect of
[0051]
According to the present invention, since the connector for external connection is integrally
provided on the cap, the connector for the external connection with the connector lead becomes
unnecessary, the number of parts is reduced, and the cost can be reduced. There is an effect that
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the assembling workability is improved.
[0052]
According to the present invention, the connector for external connection is integrally formed
with the cap in the direction substantially orthogonal to the axial direction of the ultrasonic
sensor. There is an effect that installation becomes possible.
[0053]
According to the present invention, since the connector terminal mounted on the cap is
configured to be pulled out from the cap, waterproofness of the connector terminal insertion
portion can be obtained with the mold resin filled inside the sensor case and the cap. At the same
time, the molding resin does not extend to the contact portion of the connector terminal, so that
it is possible to eliminate the need for a separate part such as seal rubber and to save the
material cost.
[0054]
According to the present invention, since the terminal insertion hole provided in the cap is
engaged with the connector terminal inserted into the end, the connector terminal and the cap
can be firmly integrated. As a result, the circuit board to be inserted and soldered into the
connector terminal can be stably held, and the assembling workability of the sensor case, the cap
and the plate spring can be improved.
[0055]
According to the present invention, since the concave groove surrounding the periphery of the
terminal insertion hole is provided on the back surface of the connector for external connection,
the resin at the time of molding is accumulated in the concave groove. The effect is that the
molding resin does not adhere to the contact portions of the connector terminals.
[0056]
According to the present invention, since the heat blocking hole is provided at the root portion of
the connector terminal mounted on the circuit board, the heat blocking hole cuts off the heat
when the circuit board is soldered to the connector terminal. Therefore, there is an effect that
there is no fear that the connector for external connection receives the thermal influence.
[0057]
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According to the present invention, since the connector terminal, the circuit board, the sensor
case, and the leaf spring are assembled in this order in the same direction to the cap in this order,
their assembly can be efficiently performed There is an effect that the workability can be
improved.
[0058]
Brief description of the drawings
[0059]
FIG. 1 is a side view of an ultrasonic obstacle detection device according to a first embodiment of
the present invention.
[0060]
2 is a partial cutaway rear view of FIG.
[0061]
3 is an exploded perspective view of FIG.
[0062]
4 is a plan view of FIG.
[0063]
5 is a front view of FIG.
[0064]
6 is a bottom view of FIG.
[0065]
7 is a cross-sectional view of the ultrasonic obstacle detection device of FIG.
[0066]
8 (a) is a cross-sectional view taken along the line CC of FIG. 7, and FIG. 8 (b) is a partially
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enlarged cross-sectional view of FIG. 8 (a).
[0067]
9 is an enlarged cross-sectional view taken along the line D-D of FIG.
[0068]
10 is an enlarged view of a portion B of FIG.
[0069]
FIG. 11 is an assembled perspective view of the ultrasonic obstacle detection device before resin
molding.
[0070]
12 is a cross-sectional view of FIG.
[0071]
FIG. 13 is a longitudinal cross-sectional view for describing the time of resin molding.
[0072]
FIG. 14 is a cross-sectional view for describing the time of resin molding.
[0073]
FIG. 15 is a longitudinal cross-sectional view of an external connection connector portion for
describing resin molding; FIG.
[0074]
FIG. 16 is a side view showing a conventional ultrasonic obstacle detection device.
[0075]
17 is a front view of FIG.
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16
[0076]
18 is a cross-sectional view taken along the line AA of FIG.
[0077]
19 is a rear end view of FIG.
[0078]
20 is an exploded side view of FIG.
[0079]
21 is a plan view of a state in which the case lid in FIG. 20 is opened.
[0080]
Explanation of sign
[0081]
Reference Signs List 20 sensor case 21 sensor body 22 outward flange 23 rib 24 ultrasonic
sensor 25 sensor holder 26 lead wire 27 circuit board 28 engagement projection 29 fitting
groove 30 cap 31 external Connector for connection, 32 terminal insertion hole, 33 connector
terminal, 33a wide area, 33b heat blocking hole, 33c hook shaped portion, 34 recessed groove,
35 opening, 36 engaging claw, 40 leaf spring, 41 spring body, 42 leg parts, 43 engagement
holes, 44 elastic engagement pieces, 45 bends, 46 middle pieces, 47 engagement holes.
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