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Industrial Application Field This invention transmits and receives ultrasonic waves to obstacles
and ground. The present invention relates to an ultrasonic transducer that can be widely applied
to various ultrasonic applications such as an ultrasonic measurement device that measures a
relatively short distance to a liquid level or the like, an automatic door, and proximity switches
such as various alarms. The configuration of the conventional example and its problems In the
past, ultrasonic application products that transmit and receive ultrasonic waves to check the
height and distance to an object, detect obstacles 9 and the like, etc. In the case of using a sound
wave sensor, each sensor is housed in another horn and attached to each other, or two horns are
integrated using a mounting plate, a fastener or the like. However, in the first configuration, it is
necessary to provide an attachment portion and a lead wire fixing means, respectively, resulting
in a complicated structure as the horn and an increase in cost. Further, in the above-described ≧
configuration, in addition to requiring a connecting means with a mounting plate, a fastener, etc.,
the number of parts as a whole is increased, and the cost is increased. 1) The common problem
with both is that it takes many mounting steps, and when the horn is given an angle, its accuracy
is very low. SUMMARY OF THE INVENTION The present invention was made to solve the abovementioned drawbacks, and it is an object of the present invention to provide an ultrasonic
transducer which is easy to assemble and install, inexpensive and has stable characteristics. In
order to achieve this object, in the ultrasonic transducer according to the present invention, a
pair of horns is slightly angled inwardly, and these are integrated through a connecting portion
provided with a lip portion as required. An ultrasonic sensor is housed at each horn end with a
molding structure. DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the
present invention will be described with reference to FIGS. 1 and 2. The same reference numerals
are given to the same parts in FIG. 1 and FIG. In the figure, reference numeral 1 denotes a pair of
left and right horns, and the left and right horns 1 are fixedly connected so as to be slightly
inward facing each other via a connecting portion 2. When the ultrasonic sensor 3 is inserted
into the horn 1 respectively, desired directivity is exhibited. At this time, in order to use one as
transmission and the other as reception, the directivity when transmitting and receiving
integrally becomes very important. Usually, it is often necessary to fix each other's horns slightly
inward in order to increase the sensitivity at a short distance and provide stable performance, but
as in the prior art, it is necessary to separately fix each horn separately In the structure of
integrating and then fixing using other parts such as mounting plates and fasteners, the angle
accuracy of the fixed side, tolerance of screw holes for fixing, tightening strength, etc. are many
at the processing stage It is extremely difficult to mount at the desired angle due to the error of,
and there is a large variation in the performance as one body of transmission and reception.
In addition, since the number of parts is large, the number of mounting steps is increased, and
the cost is inevitably increased. Therefore, in the present invention, two horns 1 are resinized
according to the desired angle to be attached. It is integrally molded of metal or the like. As a
result, if the error factor during installation and the number of installation steps are greatly
reduced, it is possible to eliminate the variation in performance per pair in both cases. Further,
by providing the rib 4 in the connecting portion 2, the entire ultrasonic transducer is reduced in
weight, and a deflection against vibration is given to increase the strength. Reference numeral 5
is a mounting hole for the entire ultrasonic transducer. Also, conventionally, there has been no
effective locking method of the lead wire connected to the ultrasonic sensor, and the part held by
the lead wire clamp and the part of the fastener were crimped. In the present invention, in order
to eliminate such inconvenience as well, the connecting portion 2 is provided with the relief
groove 7 of the lead wire 6 and the hole 9 for passing a locking object 8 such as an east line
band in the vicinity of the relief groove 6. The lead wire 6 can be locked simply by tightening the
locking member 8, greatly simplifying the locking means. In addition, when it is necessary to
protect the ultrasonic sensor 3 and the connection portion between the sensor 3 and the lead
wire 6 from water droplets, dust, and other harmful substances, the insulating material 1o can be
cast sufficiently so It is designed to have a certain depth and to have the bottom surface of the
anti-relief bottom in one plane, and the insulating material 1o is cast. Effects of the Invention As
described above, according to the ultrasonic transducer of the present invention, assembly and
mounting are very easy, the number of parts can be reduced, the number of parts can be
reduced, and therefore the cost can be significantly reduced. In addition, since the horn is an
integral molding structure, the angular accuracy is high, and there is no variation between each
pair, so it is possible to supply a large amount of ultrasonic transducers having good
performance and stable characteristics.
Brief description of the drawings
FIG. 1 is a front view showing a part of an embodiment of the ultrasonic transducer according to
the present invention in cross section, and FIG. 2 is a view seen from the direction of the horn
Reference Signs List 1 ··· Horn · 2 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · Mounting holes · · · · · · · · · · · Lead wire, · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · ·. ·Insulating material.
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