close

Вход

Забыли?

вход по аккаунту

JPH08265892

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH08265892
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
ultrasonic sensor, and in particular, a horn is provided on the front of a housing containing an
ultrasonic transducer, and a post-attaching horn is detachably attached to the horn. The present
invention relates to an ultrasonic sensor having a structure.
[0002]
2. Description of the Related Art As a conventional ultrasonic sensor, for example, there is one
shown in FIG. The ultrasonic sensor a in FIG. 9 contains an ultrasonic transducer b that transmits
ultrasonic pulses and receives a reflected wave from an object, a holding material c that holds the
ultrasonic transducer b, and a holding material c. A spherical molded product e formed as a horn
d having an open shape on one side, a surface housing f covering the sensor surface excluding
the horn d, a pressing part g for holding the spherical molded product e and attaching it to the
surface housing f A housing f is mounted, and a circuit board h, and a base housing j for housing
a power supply circuit i and the like are provided.
[0003]
As shown in FIG. 11, the ultrasonic sensor a is attached to a ceiling t, and an ultrasonic pulse is
transmitted from an ultrasonic transducer b through a horn d toward the ground. The horn d of
02-05-2019
1
the spherical molded article e is formed in a trumpet shape as shown in FIG. 10, and the
detection area formed by the horn d is a bell-shaped wide radial detection area m as shown in
FIG. ing.
[0004]
In order to be able to form a narrow detection area n in addition to a wide detection area m by
using such an ultrasonic sensor a, as shown in FIG. The detection area of the ultrasonic sensor a
can be changed. For example, as shown in the table in FIG. 14, this detection area has a diameter
of 1.2 m at a distance of 2 m from the ultrasonic sensor a and a distance of 1.5 m at a distance of
2 m from the ultrasonic sensor a without the retrofit horn k. There is a spread of diameter 1.4 m,
diameter 1.2 m at a distance of 1 m, diameter 0.9 m at a distance of 0.5 m, but if retrofit horn k
is attached, ultrasonic sensor a from When the distance is 2m, the diameter is 0.9m, when the
distance is 1.5m, the diameter is 0.9m, when the distance is 1m, the diameter is 0.8m, and when
the distance is 0.5m, the diameter is 0.8m, The detection area is substantially constant regardless
of the difference in distance from the ultrasonic sensor a.
[0005]
By the way, as shown in FIG. 12, the post-attachment horn k is conventionally fixed to the front
of the horn d of the spherical molded article e by a screw or the like, which makes it difficult to
replace the post-attachment horn k. There was a problem that the change of area was limited.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the abovementioned conventional problems, and the retrofit horn can be easily and removably attached to
the front face of the spherical molded article, and the detection area is changed. An object of the
present invention is to provide an ultrasonic sensor that can be easily performed and stably
obtain large and small detection areas, and that the transmitted ultrasonic pulse does not leak
outside the detection area.
[0007]
SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above
object, and the ultrasonic sensor according to claim 1 is characterized in that the front surface of
the housing incorporating the ultrasonic transducer is a mirror. An ultrasonic sensor having a
structure in which the post-attachment horn is further detachably attached to the horn, and a
pair of long arc holes are formed at appropriate positions on the outer peripheral wall of the
02-05-2019
2
horn. The retrofit horn corresponds to a mounting leg which is inserted into a pair of long arc
holes formed in the horn and is engaged and locked in the long arc hole by rotating it in one
direction. It has a structure that
[0008]
However, in this structure, since the ultrasonic pulse leaks from the extra opening of the long arc
hole, it is necessary to close this opening. For example, the seal member is attached in the vicinity
of the mounting leg to make the extra opening It is preferable to close the
In the ultrasonic sensor according to the second aspect of the present invention, the tip of the
mounting leg of the retrofit horn is provided with a locking claw that further protrudes outward,
and the end of the long arc hole formed in the horn is Recesses into which the locking claws are
fitted are correspondingly formed.
[0009]
In the ultrasonic sensor according to claim 3, the retrofit horn is formed with a ring-shaped skirt
portion which wraps the outer peripheral wall of the opening including the long arc hole formed
in the horn, and from the skirt portion the attachment leg It has a structure in which the
[0010]
According to the ultrasonic sensor of the present invention, when attaching the retrofit horn, the
attachment legs of the retrofit horn are inserted into a pair of long arc holes formed in the horn
and rotated in one direction for twisting. In operation, the mounting leg fits and locks in the long
arc hole and the retrofit horn is mounted.
[0011]
With such a simple twisting operation, the retrofit horn can be attached to change the detection
area of the ultrasonic sensor.
According to the ultrasonic sensor of claim 2, when the mounting leg is inserted into the long arc
hole and twist operation is performed, the locking claw formed at the tip of the mounting leg is
02-05-2019
3
fitted into the recess formed at the end of the long arc hole Installation will be more secure.
[0012]
In addition, if an elastic material or the like is used as the material of the mounting leg, the click
feeling can be given at the time of mounting, so that the mounting can be confirmed.
According to the ultrasonic sensor of claim 3, since the opening of the long arc hole into which
the mounting leg is inserted is covered and closed by the skirt portion, the ultrasonic pulse
emitted from the ultrasonic transducer becomes the detection area There is no leak outside.
[0013]
Embodiments of the ultrasonic sensor according to the present invention will be described below
with reference to the drawings.
In the ultrasonic sensor of the present embodiment, the parts other than the spherical molded
article provided with the horn and the post-installed horn have substantially the same structure
as that of the conventional ultrasonic sensor shown in FIG. Description is omitted.
[0014]
FIG. 1 shows a state in which the post-attachment horn 3 is attached to the spherical molded
article 2 of the ultrasonic sensor 1 to FIG. 5 shows the shape of the spherical molded article 2
and FIGS. .
In the ultrasonic sensor 1 of the present embodiment, the horn 2a of the spherical molded article
2 is provided on the front face of a housing f (see FIG. 9) incorporating the ultrasonic transducer
b (see FIG. 9). The post attachment horn 3 is configured to be detachably attached to the rear
attachment 2a by a simple operation, and a pair of long arc holes 2c and 2c are formed at
appropriate positions of the outer peripheral wall 2b of the horn 2a. There is. The retrofit horn 3
is inserted into a pair of long arc holes 2c, 2c formed in the horn 2a, and is fixed to the long arc
02-05-2019
4
holes 2c, 2c by rotating it in one direction. Legs 3a, 3a are provided correspondingly.
[0015]
Further, as shown in FIG. 1 and FIG. 2, locking claws 3 b protruding outward are respectively
provided at the tips of the mounting legs 3 a and 3 a of the retrofit horn 3, and the length formed
on the horn 2 a At the end of the arc holes 2c, 2c, that is, at the end in the twist direction, a
notch-like recess 2d into which the locking claw 3b is fitted is formed correspondingly. As shown
in FIGS. 1, 7 and 8, the retrofit horn 3 is formed with a ring-shaped skirt 3c that wraps around
the opening outer peripheral wall 2b including the long arc holes 2c and 2c formed in the horn
2a. Mounting legs 3a and 3a are provided to project from the skirt portion 3c.
[0016]
The ring-shaped skirt portion 3 c is formed on the outer periphery of the base of the retrofit horn
3 with an annular cut groove 3 h having a V-shaped cross section which is cut inward and
obliquely upward. It comes into contact with the outer peripheral wall 2b of the horn 2a in a
state of being along the outer peripheral wall 2b. If the seal material is attached around the Vshaped annular cut groove 3h formed in the skirt portion 3c, the air leakage preventing effect is
further enhanced.
[0017]
As shown in FIGS. 2 to 4, the long arc holes 2c and 2c are provided with a large hole 2d and a
small width hole 2f continuous with the large hole 2e, and the end of the small width hole 2e,
that is, the spherical molding A recess 2 d is formed on the inner surface of the product 2 in a
cut-like manner. In FIGS. 1, 3 and 5, reference numeral 2 g is a reinforcing plate portion radially
provided on the horn 2 a of the spherical molded article 2.
[0018]
Next, the mounting operation of the retrofit horn 3 in the ultrasonic sensor 1 of the present
embodiment will be described. The mounting legs 3a, 3a of the retrofit horn 3 are respectively
02-05-2019
5
inserted into the large hole portions 2d, 2d of the long arc holes 2c, 2c and rotated in the
direction of the small width hole portion 2f to perform twist operation. Then, the locking claws
3b, 3b of the mounting legs 3a, 3a are respectively fitted into the concave portions 2d, 2d
formed at the ends of the long arc holes 2c, 2c of the horn 2a, so that they are prevented from
coming off. Mounted on
[0019]
If the mounting legs 3a, 3a are made of a resin material or the like, they can be made elastic, so
that the mounting legs 3a, 3a can be made to have a click feeling to confirm the mounting. In
addition, when the opening outer peripheral wall 2b including the long arc holes 2c and 2c is
enclosed and closed by the ring-shaped skirt portion 3c formed in the retrofit horn 3 in the
attached state of the retrofit horn 3, from the ultrasonic sensor 1 It is possible to prevent the
leakage of the emitted ultrasonic pulse.
[0020]
In addition, in the retrofit horn 3 in which the ring-shaped skirt portion 3c is not formed, the
long arc holes 2c, 2c remaining after inserting the mounting legs 3a, 3a into the long arc holes
2c, 2c of the horn 2a and twisting them. For example, a sealing material may be attached to the
extra opening to close the opening so that the ultrasonic pulse does not leak to the outside.
[0021]
As described above, in the ultrasonic sensor according to claim 1, the retrofit horn can be
attached simply by inserting the retrofit horn attachment leg into the horn, and the detection
area of the ultrasonic sensor is changed And two large and small detection areas can be stably
obtained.
[0022]
In the ultrasonic sensor according to claim 2, when the mounting leg of the retrofit horn is
inserted and twist operation is performed, the locking claw formed at the tip of the mounting leg
is fitted into the recess formed at the end of the long arc hole Because installation is secure.
In addition, by selecting the material of the mounting leg, a click feeling can be given and the
02-05-2019
6
mounting can be confirmed.
[0023]
In the ultrasonic sensor according to claim 3, the opening into which the attachment leg of the
retrofit horn is inserted is enclosed by the skirt portion formed in the retrofit horn, so that the
transmitted ultrasonic pulse does not leak outside the detection area. Ultrasonic pulses can be
transmitted accurately.
[0024]
Brief description of the drawings
[0025]
1 is a longitudinal sectional view showing the mounting structure of the main part of the
embodiment of the ultrasonic sensor according to the present invention.
[0026]
2 is a plan view of a spherical molded article having a horn in the ultrasonic sensor of the
embodiment.
[0027]
3 is a bottom view of a spherical molded article having a horn in the ultrasonic sensor of the
embodiment.
[0028]
4 is a side view of a spherical molded article having a horn in the ultrasonic sensor of the
embodiment.
[0029]
5 is a longitudinal sectional view of a spherical molded article having a horn in the ultrasonic
sensor of the embodiment.
[0030]
6 is a plan view of a retrofit horn in the ultrasonic sensor of the embodiment.
02-05-2019
7
[0031]
7 is a side view of the retrofit horn in the ultrasonic sensor of the embodiment.
[0032]
8 is a longitudinal sectional view of the post-attachment horn in the ultrasonic sensor of the
embodiment of FIG.
[0033]
9 is a longitudinal sectional view showing the internal structure of a conventional ultrasonic
sensor.
[0034]
10 is a longitudinal sectional view of a spherical molded article having a horn in the conventional
ultrasonic sensor.
[0035]
11 is an explanatory view showing a detection area in the conventional ultrasonic sensor.
[0036]
FIG. 12 is a longitudinal sectional view showing a state in which a post-attachment horn is
attached to the conventional ultrasonic sensor.
[0037]
13 is an explanatory view showing a detection area in a conventional ultrasonic sensor attached
with a post-attachment horn.
[0038]
14 is a table showing a detection area when the retrofit horn is not attached and a detection area
when the retrofit horn is attached.
[0039]
02-05-2019
8
Explanation of sign
[0040]
Reference Signs List 1 ultrasonic sensor 2a horn 2b outer peripheral wall 2c long arc hole 2d
recess 3 retrofit horn 3a mounting leg 3b locking claw 3c ring-shaped skirt portion
02-05-2019
9
1/--страниц
Пожаловаться на содержимое документа