JPS58109177A - Ultrasonic washer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to improvements in ultrasonic cleaners.

Conventionally, ultrasonic cleaners have generally had a configuration in which a vibrator is bonded to a cleaning tank with a so-called pegboard. Therefore, the natural frequency of the bottom of a tank or the like to which the vibrator is attached is related to the frequency of the camera element to cause resonance, thereby obtaining an efficient amplitude of sound waves. Therefore, it is necessary to produce a washing tank manufactured by press molding with no variation in the natural frequency of the vibrating part, which requires ultra-high quality control.
In general, the yield after press molding was extremely poor.

In particular, if the vibrator and the bottom of the tank are curved in order to concentrate sound waves, it would be nearly impossible to match the curvatures in mass production, so flat surfaces are generally used. Therefore, the sound waves are generated at right angles to the tank surface where the vibrator is attached.
Since the vibrational energy in the cleaning solution is almost uniform, if it is necessary to perform instantaneous cleaning with even stronger energy, for example,
In order to wash away the blood and cell tissue that has entered the tiny cavities of the emery, which is a caries treatment tool used in dentistry, it is necessary to install a large-capacity ultrasonic cleaner with several times the output. Hot light.

The present invention was made in view of the above situation, and it has a small capacity and can efficiently wash broken waves that are difficult to remove dirt in a short time. It is intended to provide.

The ultrasonic cleaner of the present invention comprises a cleaning tank with a vibrator attached thereto, and the tank having a bottom divided into a plurality of parts each having an inverted pyramid-shaped bottom part, and a vibrator attached to the bottom of the tank and formed in a dish shape so that the oscillated ultrasonic waves are converged at the intersection point of the upper layer of the wave washing liquid in the tank, and each of the vibrators. A driving high frequency generator is provided.

An embodiment of the ultrasonic cleaner of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a plan view, FIG. 2 is a top view taken along the line A-0-B in FIG. 1, and FIG. 3 is an explanatory diagram of the operation. In Figures 1 and 2, 1 is a cylindrical tank for cleaning, and the bottom surface is similar to a triangular pyramid and is formed into nine planar bottom parts 2, 3.4, and the radial position of each bottom part 2, 3.4 The boundary is formed by a rib 5 having a semicircular cross section, and each bottom surface is formed to be vibrationally independent. Disposed plate-like electrostrictive transducers 7a, 7b, and 7c having the same shape and having a quadratic curved surface 6 concave upward are disposed on each bottom portion 2, 3.4, and the transducers 7a,
7b and 7c are respectively supported by elastic supports 9a, gb and @c in the vicinity of the vibration nodes. and each is attached to the n bottom surface 2.3°4 in a water-sealing manner, and
The central axes 9Jl, 9b, 9CFi are formed so as to pass through a point 11 located at the upper end of the cleaning liquid 10.

12゜13Fi Electrodes for electrically energizing the vibrators 7a, 7b, 7c are inserted and molded inside the elastic supports 5a, Bb, f3c and are completely insulated from the cleaning liquid 10, and are in the pre-assembly position shown by dotted lines. It is also formed so that it can be bent and used as a retainer to prevent removal.

Reference numeral 14 is a power source which energizes a high frequency generator 16 via an isolation transformer 15. Then, the high cylindrical wave voltage is applied to each electrostrictive vibrator 7a, 7b.

7C is applied to the vibrator 7a and to the vibrator 7b.

7C are electrically connected via reactance 17 and capacitance 18 so that they are delayed or advanced in phase, respectively, and are controlled by knob 1 so that they increase and decrease at the same time.
It is designed to be operated by 9. Incidentally, the dish-shaped root motion quadratic curved surface 6 is formed such that the telephonic sound waves generated from the quadratic curved surface 6 converge at the intersection point 11.

Next, as objects to be cleaned, for example, an emery 21 attached to a rotating head 20 for treatment in the case of dental care and a denture 22 will be explained. In the case of Emery 21, narrow and deep recesses are densely formed on the surface, and when cavities are scraped, fine particles of organic and inorganic substances are bound together. When the next patient is to be treated, all of these fine particles are removed, and
It must be disinfected, and it must be completely done in a short period of time. In the past, it was extremely difficult to completely remove the fine particles, so a fairly large ultrasonic cleaner was installed. By the way, in this embodiment, each sound wave is designed to converge at the intersection point 11.

Therefore, the amplitude V is shown in Fig. 3, where the vertical axis is the amplitude V and the horizontal axis is the time tt. As shown in 1, the vibrator 7
If the phase differences 0b and θ of b and 7C with respect to the vibrator 7a are respectively zero, then the vibrator 7a.

The phases of the transducers 7b and 7c match, and the sound wave at the intersection point 11 has a maximum amplitude 23 due to the superposition of the maximum amplitudes of the transducers 7m, 7b, and 7c. Therefore, as in the case of Emery 21, dirt that was considered difficult to remove can be easily cleaned with a small output vibrator.

On the other hand, in the case of a material made of a relatively soft synthetic resin such as 11122, a fairly flexible action is required to remove dirt that has entered the pinched portion 24, 25 during the technique. . At this time, the cleaning section 26 avoids the vicinity of the intersection ll of the overlapping portions of the vibrators 7m, 7b, and 7c for cleaning.

However, in general, as shown in Figure 3 (b), the mobile element 7b,
Cleaning is performed at the intersection point 11 by adding a phase difference to the amplitude of the sensor 7c to give an amplitude 27 with respect to the amplitude of the camera element 7a. Furthermore, when a phase M is added, the result is formed as shown in Figure 3 B), and in this case, the combined amplitude of the sound wave becomes zero at the intersection point 11, such as the amplitude 28, that is, by adjusting the knob 19, it can be changed from zero to the maximum. Can be adjusted in stages.

Next, in general, in order to obtain highly efficient in-liquid sound waves with respect to the amplitude of the oscillator, it is most important that the free movement of the oscillator is not hindered. In this embodiment, since the plate-shaped S mover is elastically supported near the shooting node, there is almost no hindrance to free vibration.

'Furthermore, since the boundary of the bottom of the tank is formed by the lip 5 having a semicircular cross section, each lip can correspond to the amplitude of the vibrator independently.

The -: sonic cleaner of this embodiment is configured in this way, and by changing the phase of the amplitude of a plurality of image pickup elements, the magnitude of the composite amplitude can be changed from zero to the maximum.
It is possible to sufficiently perform cleaning by simply adjusting the cleaning Fi knob of the most other object to be cleaned to the maximum amplitude. At this time, the plurality of vibrators may be very simple and small-sized products, and a general high frequency generator may be used. Since the center axis of the mover intersects with the upper part of the washing water, the maximum amplitude of the sound waves can be effectively superimposed, allowing for short-term washing of small broken waves and imaging with a small volume of output. A child can do it well. In addition, since the vibrator's node area is supported by an elastic support, the impedance is extremely low, and there is no need to avoid resonance with the bottom of the tank.
A structure with a small capacity, small size, and high yield can be obtained. In addition, the vibrator's node area is supported by an elastic support, and this elastic body has the function of insulating the electrodes from the inside of the tank, insulating each other, and sealing the bottom of the tank, making work reliable and durable. and can improve performance. In addition, since the vibrator has a concave quadratic curved surface facing upward and supports the vicinity of the amplitude node, the generation and convergence of moving sound waves in the cleaning liquid are performed without difficulty, increasing productivity.

It has excellent uniformity in quality, durability in use, and can improve performance. The transducer mounting surface of the tank is partitioned by ribs with a semicircular cross section to match the number of transducers used, so the vibration system, including the transducer, can have independent characteristics, ensuring quality stability. improves.

As described above, the ultrasonic cleaner of the present invention has a small capacity,
This has the effect that objects to be cleaned from which dirt is difficult to remove can be efficiently cleaned in a short period of time, and the operation is simple and easy.

[Brief explanation of drawings]

Figure 1 is a plan view of an embodiment of the ultrasonic cleaner of the present invention, @2
The figure is a sectional view taken along the arrow A-0-B in Figure 1, Figure 3 (A), (
FIG. 1 is an explanatory diagram of the amplitude of the ultrasonic cleaner shown in FIG. 1./7ri, 2, 3.4...bottom, 7a, 7b. 7C... Vibrator, 10... Cleaning liquid, 11... Crossing point, 1st tip 2M 30th t

Claims (1)

[Claims] 1. An ultrasonic cleaner in which a vibrator is installed in a cleaning tank, the tank having a bottom divided into a plurality of parts each having an inverted pyramid-shaped bottom, and A camera element attached to the bottom and formed in a dish shape so that the oscillated ultrasonic waves are converged at the intersection point of the upper layer of the cleaning liquid in the tank, and a high frequency generator that drives each of the vibrators. An ultrasonic cleaning device characterized by being equipped with a device. 2. The ultrasonic cleaner according to claim 1, wherein a reactance and a capacitance are inserted into the circuit to which the vibrator is connected, so that the combined amplitude can be adjusted. 3. The ultrasonic cleaner according to claim 1, wherein the vibrator is fixed to the bottom through an elastic support near a vibration node. 4. Claim No. 4, wherein the elastic support is formed to serve both as an electrical insulating material that covers an electrode for electrically biasing the vibrator, and as a water sealing material for the bottom portion. The ultrasonic cleaner according to item 1. 5. The ultrasonic cleaner according to claim 1, wherein a lip having a semicircular cross section is formed at the mutual boundary of each of the bottom parts.