JPS6031352Y2 - Rotating structure of ultrasonic horn - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a horn rotation structure of an ultrasonic switch that reduces reverberation and improves wrap-around characteristics.

As shown in FIG. 4, in the conventional ultrasonic switch, a housing 14 containing a horn 1 and a vibrator 3 is rotatably mounted on a mounting base 16 using a ball and socket joint 15. 3 vibrates, causing the horn 1 to vibrate and emit ultrasonic waves, the vibrations cause the housing 14 and the mounting base 1 to vibrate.
6, and the decay time of the reverberant sound was becoming longer.

Therefore, when emitting ultrasonic waves, it has the disadvantage that it is not possible to emit pulsed ultrasonic waves that are intermittent at short intervals, and when an ultrasonic horn for transmitting and receiving waves is used in a reflection type ultrasonic switch, the reverberant sound is reflected. This has the disadvantage that the malfunction time becomes longer due to the so-called wrap-around phenomenon, in which the ultrasonic switch is received as sound and malfunctions.

The present invention aims to solve the above-mentioned drawbacks.

The present invention will be explained in detail below with reference to embodiment figures.

In FIG. 1, a horn 1 is connected at its base end to a cylindrical transducer housing part 2, and an ultrasonic transducer 3 is housed in the transducer housing part 2.

A spherical cylinder 4 provided around the base end of the horn 1 is used to adjust the angle of the horn 1, and its outer peripheral surface is spherical, and a cylindrical projection 5 provided on the outer peripheral surface is rotatably held in an annular groove 8 provided in the side wall of the horn insertion hole of the main body 7 by an annular anti-vibration rubber material 6, and the cylindrical projection 5 is held in the annular groove by the elastic force of the anti-vibration rubber material 6. It slides while being pressed against the side wall of 8.

Now, as the protrusion 5 slides in the annular groove 8, the horn 1 rotates around the vertical axis (the center axis of the horn), and the protrusion 5
Since it has a cylindrical shape, the horn 1 can freely rotate around the horizontal axis (the line connecting both protrusions).

In the figure, 11 is a protective cover, and 12 is an insect repellent rope.

In the embodiment, an annular groove 8 is formed by the terminal block 9 of the main body 7 and the holding plate 10.

Further, since the outer peripheral surface of the cylinder body 4 is also brought into pressure contact with the vibration-proofing rubber material 6, a further vibration-proofing effect is obtained.

Figure 3 is a diagram showing the vibration isolation effect of the present invention, where dotted line A shows the reverberation characteristics when the horn section is not supported by an elastic body, and solid line B shows the reverberation characteristics when the horn section is supported by an elastic body (horizontal axis is 2 hours; Vertical axis:
The received wave detection voltage of the wrap-around amount is shown.

Figure 2 shows another embodiment, in which an annular anti-vibration rubber material 6 with a U-shaped cross section is used, and since the anti-vibration rubber material 6 can be fixed to the periphery of the mounting hole during assembly, the anti-vibration rubber material will not shift. This has the advantage of making the assembly work easier.

The present invention is constructed as described above, and the protrusions provided at two diametrical locations on the outer peripheral surface of the cylinder are inserted into the annular groove provided on the inner peripheral edge of the horn insertion hole of the main body. The ultrasonic horn can be rotated (for example, rotated in a vertical plane) using cylindrical protrusions provided at two diametrical locations on the outer peripheral surface of the cylindrical body fixed to the base end of the cylindrical body as a rotation axis. , the ultrasonic horn can be rotated (for example, rotated in a horizontal plane) about the central axis of the horn insertion hole by sliding the protrusion into an annular groove provided on the inner peripheral edge of the horn insertion hole; This has the effect that a so-called two-axis rotation mechanism can be realized with a simple configuration, and since the protrusion is elastically clamped between the annular elastic member attached to one side wall of the annular groove and the other side wall, this annular The projection is pressed against the other side wall by the elastic force of the elastic material, and the rotated ultrasonic horn can be easily fixed without using fixing screws, and the vibration transmitted from the ultrasonic horn to the cylinder body is The vibration absorption effect of the annular elastic material attenuates the vibration, thereby reducing reverberation and simplifying the structure of the fixing means and the vibration absorption means.

In other words, in the present invention, the annular elastic material that elastically supports the protrusion and fixes the ultrasonic horn forms the vibration absorption means that absorbs reverberant sound, and the fixing function and vibration absorption function are two-axis rotation. This can be achieved with one member forming the moving mechanism, and has the effect of simplifying the configuration.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of one embodiment of the present invention, FIG. 2 is a side sectional view of another embodiment, and FIG. 3 is a diagram showing the vibration isolation effect of the present invention.
FIG. 4a is a side sectional view of the conventional example, and FIG. 4a is a front view of the same. 1 is a horn, 2 is a vibrator housing part, 3 is a vibrator, 4 is a cylinder, 5 is a protrusion, 6 is an annular elastic body, 7 is a main body, and 8 is an annular groove.

Claims (1)

[Scope of utility model registration request] A cylindrical vibrator storage part is connected to the base end of the horn, and a cylindrical body with a spherical outer surface is fixed around the base end of the horn. A cylindrical protrusion is provided at the location, an annular groove in which the protrusion slides is provided on the inner peripheral edge of the horn insertion hole of the main body, and the protrusion is provided between the annular elastic member attached to one side wall of the annular groove and the other side wall. A rotating structure of an ultrasonic horn consisting of a compressive clamp.