JPS60260293A - Ultrasonic sound wave transceiver - Google Patents

Abstract

PURPOSE:To attain ease of assembling and mounting and to reduce man-hour by giving an angle slightly inward to a couple of horns and forming incorporatedly them via a joint part having a rib as required. CONSTITUTION:Right/left horns 1 are connected fixedly so as to be directed slightly inward mutually. In inserting respectively an ultrasonic wave sensor 3 to the horns 1, a desired directivity is realized. In such a case, in order to use one of them as a transmitter and the other as a receiver, the directivity when the transmitter and receiver are incorporated has a great importance. Thus, the two horns 1 are formed incorporatedly by resin and metal while they are connected to a desired angle to be connected. Further, the entire ultrasonic wave transmitter/receiver is reduced in weight by providing the rib 4 to the joint part 2 and the strength against vibration is increased by providing bend to the horns 1.

Description

[Detailed description of the invention] Industrial applications This invention sends and receives ultrasonic waves to obstacles and the ground.

The present invention relates to an ultrasonic transducer that can be widely applied to a variety of ultrasonic application products, such as ultrasonic measuring devices that measure relatively short distances to liquid surfaces, automatic doors, proximity switches for various alarms, etc.

Conventional configuration and its problems Conventionally, ultrasonic applied products transmit and receive ultrasonic waves to check the height and distance to an object, and detect obstacles such as the human body. In the case of sound wave sensors, each sensor is housed in a separate horn and attached to each, or the two horns are integrated using a mounting plate, a fastener, or the like.

However, in the first configuration, a mounting portion and a lead wire fixing means must be provided for each horn, which results in a complicated structure of the horn and an increase in cost. In addition, the above-mentioned configuration ≧ requires a means for connecting with a mounting plate, a fastener, etc., and the number of parts increases as a whole, resulting in an increase in cost. The common drawbacks of both types were that it required a lot of man-hours to install them, and that the accuracy of setting the angle to the horn was very low.

Purpose of the Invention The present invention has been made to solve the above-mentioned drawbacks.
The purpose of the present invention is to provide an ultrasonic transducer that is easy to assemble and install, is inexpensive, and has stable characteristics.

Structure of the Invention In order to achieve this object, the ultrasonic transducer of the present invention has the following features:
A pair of horns are angled slightly inward, and they are integrally molded via a joint with a lip as necessary, and an ultrasonic sensor is housed at the end of each horn. .

DESCRIPTION OF EMBODIMENTS - An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Identical parts in FIG. 1 and FIG. 2 are given the same numbers.

In the figure, 1 is a pair of left and right horns, and the left and right horns 1
are fixedly connected to each other via a connecting portion 2 so as to face slightly inward. When an ultrasonic sensor 3 is inserted into each of the horns 1, a desired directivity is achieved. At this time, in order to use one side for transmission and the other for reception, the directivity when the transmitter and receiver are combined becomes very important. Normally, in an ultrasonic sensor, it is often necessary to fix the horns of each other slightly inward in order to increase sensitivity at short distances and ensure stable performance. In structures that are integrated and fixed using other parts such as mounting plates and fasteners, there are many issues at the processing stage, such as the angular accuracy of the fixed side, the tolerance of the fixing screw holes, and the strength of the tightening. It was extremely difficult to mount it at the desired angle due to the error in the angle, and there were large variations in performance as a transmitter and receiver unit. In addition, the large number of parts increases the number of installation steps, which inevitably results in an increase in costs. Therefore, in the present invention, two horns 1 are made of resin according to the desired mounting angle.

It is integrally molded from metal, etc. This greatly reduces the error factors during installation and the number of installation steps, and also eliminates variations in performance from pair to pair. In addition, by providing ribs 4 on the connecting portion 2, the weight of the entire ultrasonic transducer is reduced, and the ultrasonic transducer is made to be flexible against vibrations, thereby increasing its strength. 5 is a mounting hole for the entire ultrasonic transducer.

Furthermore, in the past, there was no effective method for locking the lead wire connected to the ultrasonic sensor, and the lead wire was held down with a lead wire holder or caulked with a part of a fastener.

In the present invention, in order to eliminate such inconvenience, a relief groove 7 for the lead wire 6 is provided in the connecting portion 2, and a hole 9 is provided near the relief groove 6 for passing a retaining object 8 such as an east line band. , the lead wire 6 can be locked simply by tightening the locking object 8,
The locking means is greatly simplified. In addition, if it is particularly necessary to protect the ultrasonic sensor 3 and the connection between the sensor 3 and the lead wire 6 from water droplets, dust, and other harmful substances, make sure that there is enough space in the sensor storage area so that the insulating material 1o can be cast. The insulating material 1o is designed to have a certain depth and the lower surface of the sag is placed on one plane to prevent dripping.

Effects of the Invention As described above, according to the ultrasonic transducer of the present invention, assembly and installation are extremely easy, the number of man-hours can be reduced, and the number of parts can be reduced, so that costs can be significantly reduced. In addition, since the horn is integrally molded, the angle accuracy is high, and there is no variation between pairs, so the performance is good and we can supply large quantities of ultrasonic transducers with stable characteristics.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view showing an embodiment of the ultrasonic transducer of the present invention, and FIG. 2 is a view seen from the horn opening direction. 1...Horn, 2...Connection part, 3.
...Ultrasonic sensor, 4... Lip part, 5.
...Mounting hole, 6...Lead wire, 7...
...Relief groove, 8...Retaining object, 9...
Retaining object through hole, 10...Insulating material.

Claims (1)

[Claims] (1) An ultrasonic transducer comprising a pair of horns facing slightly inward, integrally molded via a joint, and an ultrasonic sensor housed at the end of each horn. (2) The ultrasonic transducer according to claim 1, wherein a lip portion is provided at the connecting portion. (3) The ultrasonic transducer according to claim 1, wherein an escape groove for a lead wire for connection of an ultrasonic sensor is provided on a side surface of the connecting portion. (4) The ultrasonic transducer according to claim 1, wherein a hole is provided in the vicinity of the relief groove, and a locking object such as an east line band is passed through the hole to lock the lead wire. (6) The ultrasonic transducer according to claim 1, wherein an insulating material is cast into the connection portion between the ultrasonic sensor and the lead wire.