JP2004041691A - Ultrasonic toothbrush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultrasonic toothbrush which can securely remove plaque by ultrasonic cavitation action and has excellent efficiency of transmitting ultrasonic vibration. <P>SOLUTION: This toothbrush has the main body part 1 with an ultrasonic signal generating means 7, an ultrasonic vibrator 8 to generate ultrasonic wave by signals from the ultrasonic signal generating means 7, and a horn 3 to transmit vibration from the ultrasonic vibrator 8, and a brush part 2 with a brush head part 2A implanted with bristles 5, and a vibration receiving plate 4 to receive vibration from the horn 3 in a condition integrally fixed on the brush head part 2A, and a vibration motor 21 to give the main body 1 mechanical vibration. The brush part 2 is supported at two points of the tip end part of the horn 3 and the head part 9 of the main body part 1 and detachably attached to the main body part 1. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a toothbrush, and more particularly, to an ultrasonic toothbrush capable of efficiently generating cavitation by ultrasonic energy and thereby easily removing plaque from teeth.
[0002]
[Prior art]
Conventionally, as a method for removing tooth stains, there is a method of brushing using a toothbrush in which brush bristles are planted at the tip of a handle.
In this method, the tooth surface is mechanically polished with brush bristles in direct contact with the tooth.
However, since such a toothbrush is moved by a human hand, its speed is limited and a sufficient cleaning effect cannot be obtained. In particular, a satisfactory effect cannot be expected especially for an infant or the like.
Further, in order to polish more reliably, at least 10 minutes or more are required, which is not always efficient.
[0003]
From such a viewpoint, a toothbrush using ultrasonic waves has been developed from the viewpoint of brushing teeth efficiently.
For example, an ultrasonic toothbrush disclosed in Japanese Unexamined Patent Publication No. 63-109807 discloses a brush bristle in which ultrasonic vibration from a vibrator provided in a handle is implanted in a brush portion by a metal rod having ultrasonic conductivity. (See Patent Document 1).
The ultrasonic vibrations transmitted to the brush bristles cause cavitation in saliva and liquefied dentifrice in the oral cavity, destroying the bacterial cilium and insoluble glucan of plaque bacteria attached to the tooth surface, and chaining. You can also remove plaque by solving
Therefore, in addition to the effect of brush tip alone, cavitation is generated on the tooth surface to remove plaque, which is extremely efficient.
[0004]
The piezoelectric ceramic vibrator of this toothbrush has an ultrasonic wave so as to penetrate through the neck when screwing the neck (that is, a portion having a hollow structure connecting the handle and the brush) to the handle. A conductive waveguide metal rod protrudes.
A waveguide metal socket that is connected to the tip of the waveguide metal rod so that ultrasonic waves can be transmitted when the neck and the handle are screwed is embedded in the head of the neck.
[0005]
In addition, an ultrasonic conductive waveguide metal plate is embedded in the head so as to extend to the waveguide metal socket, and the root of the brush is fixed to the waveguide metal plate so that ultrasonic waves can be transmitted. Alternatively, it is connected and its upper part is protruded from the head surface to the outside.
Because of this structure, the ultrasonic vibration is transmitted from the ultrasonic transducer through the waveguide metal rod, the waveguide metal socket, and the waveguide metal plate to the root of the brush. However, there is a drawback that frictional heat is generated at (2) (that is, a drawback that ultrasonic vibration energy is diffused into frictional heat energy), which is not always sufficient from the viewpoint of ultrasonic vibration transmission efficiency.
[0006]
In this toothbrush, water, glycerin and other ultrasonically permeable media are interposed, if necessary, at connection parts and fixed parts where air gaps can occur in the ultrasonic conduction path, but the transmission efficiency of ultrasonic vibration is does not change.
In addition, since the neck and the handle are screwed together, when the neck is rotated during attachment, abrasion is likely to occur between the waveguide metal rod and the waveguide metal socket.
If the cervix is replaced many times, the waveguide metal rods of the stalk are worn out, and the transmission of ultrasonic vibrations to the cervix becomes worse thereafter.
[0007]
[Patent Document 1]
JP-A-63-109807
[Problems to be solved by the invention]
The present invention has been made in order to overcome the above-mentioned problems against the background of the actual situation.
That is, an object of the present invention is to provide an ultrasonic toothbrush capable of accurately removing plaque by cavitation action by ultrasonic vibration and having excellent ultrasonic vibration transmission efficiency.
[0009]
[Means for Solving the Problems]
Thus, the inventor of the present invention has conducted intensive studies on the background of such a problem, and as a result, the tip of the horn and the head of the main body have been reduced so that the brush portion has as little contact with the main body as possible. The present inventors have found that the transmission efficiency of the ultrasonic vibration can be improved by supporting at two places, and the present invention has been completed based on this finding.
[0010]
That is, the present invention provides (1) an ultrasonic signal generating means, an ultrasonic vibrator for generating ultrasonic waves based on a signal from the ultrasonic signal generating means, and a horn for transmitting vibration from the ultrasonic vibrator. A brush unit having a brush head on which brush bristles are implanted, and a vibration receiving plate for receiving vibration from a horn while being integrally fixed to the brush head unit; and applying mechanical vibration to the body. The ultrasonic toothbrush is provided with a vibrating motor, and the brush part is supported on the body part at two places, that is, the tip of the horn and the head of the body part, and is detachably attached.
[0011]
(2) The horn has a reduced portion, and the reduced portion is pressed and attached between a rib-like projection formed on the inner wall portion of the brush head and the vibration receiving plate, and is attached. Exist in a toothbrush.
[0012]
Also, (3) an ultrasonic toothbrush in which a tapered portion having an inclination is formed at the tip of the reduced portion of the horn, and the horn is easily guided on the rib-shaped protrusion by the tapered portion. Exists.
[0013]
Further, (4), the reduced part of the horn is present in an ultrasonic toothbrush having a semicircular cross section and a plurality of cutout grooves formed in this arc.
[0014]
Also, (5), there are three notched grooves, at least one of which is present in the ultrasonic toothbrush arranged at a position corresponding to the vibration receiving plate.
[0015]
(6) At the portion where the horn protrudes from the head end of the main body, the super-packing is closed by a flexible packing so that the liquid does not flow back into the main body through the gap in the brush head. Sonic exists in toothbrush.
[0016]
Further, (7) the brush portion has a brush head portion and a hollow leg portion extending slightly downward from the brush head portion, and the leg portion has a pair of tongue pieces at an end portion. The pair of tongues is provided in an ultrasonic toothbrush which is mounted by being press-fitted from outside to a pair of receiving grooves formed in the head of the main body.
[0017]
Further, (8), the vibration receiving plate is exposed to the outside through the brush head portion, and is present in the ultrasonic toothbrush in which the bristles are implanted in the exposed portion.
[0018]
(9) The ultrasonic toothbrush further comprising an ion generating means, wherein the electrode portion of the ion generating means is provided at a position on the outer surface of the main body perpendicular to the direction in which the bristles are implanted. Exists.
[0019]
The present invention can naturally adopt a configuration in which two or more selected from the above 1 to 9 are combined as long as this object is met.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The ultrasonic toothbrush of the present invention has a function of generating cavitation sufficient to remove plaque on the tooth surface by ultrasonic energy to more effectively remove plaque.
[0021]
FIG. 1 is an external view showing an ultrasonic toothbrush according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing the first half of the ultrasonic toothbrush, where (A) is a plan cross-sectional view and (B) is a side cross-sectional view.
[0022]
The toothbrush has a main body 1 provided with a means for generating ultrasonic vibration and a horn 3 for transmitting the vibration, a vibration receiving plate 4 for receiving vibration from the horn 3, and a brush head 2A on which brush bristles 5 are planted. And a brush unit 2 having the following.
The ultrasonic vibration generating means includes an ultrasonic signal generating means 7 and an ultrasonic vibrator 8 for generating an ultrasonic wave based on a signal from the ultrasonic signal generating means 7.
The ultrasonic signal generating means 7 includes a control unit 13 for controlling the whole, an ultrasonic transmitter 14 for generating an ultrasonic signal, a timer unit 15 for controlling an ultrasonic transmission time, and controlling a current for generating ions. An ion current control unit 20, a vibrating motor 21 for applying mechanical vibration, and a power supply unit 16 are provided (see FIG. 3).
[0023]
The power supply unit 16 includes a chargeable rechargeable battery 17, a charge terminal 18, and a charge control unit 19 that controls charging of the rechargeable battery 17 from the charge terminal 18 during charging.
The control unit 13 controls the state of the ultrasonic toothbrush, and receives signals from a power switch 10 (see FIG. 1) provided outside the main body 1, a timer unit 15, and a power unit 16. Have been.
Regarding the power supply, the control unit 13 receives a signal from a power switch 10 provided outside the main unit 1 and turns on / off the power supply based on the signal.
[0024]
The power switch 10 is provided with a self-illuminating LED (not shown). The power switch 10 emits light when the power is on, and turns off when the power is off.
In the ON state, when the rotation of the vibrating motor is slow (that is, when the mechanical vibration is felt weak by hand), it is blue, and when the vibration of the vibrating motor is fast (that is, when the mechanical vibration is felt strongly by hand). A two-stage switching is adopted so that the color becomes red.
When the electromotive force of the rechargeable battery is insufficient, the LED turns off during use to notify that charging is necessary.
By the way, since the ultrasonic vibration caused by the horn is hardly felt by the hand, the user cannot always sufficiently receive the feeling of brushing his / her teeth.
Therefore, the vibrating motor gives a feeling of vibration.
[0025]
Conversely, when detecting the signal indicating that the charging is completed from the power supply unit 16, the control unit 13 blinks the LED in green to notify that the charging is completed.
The rechargeable battery 17 of the power supply 16 is charged via the charging terminal 18 when the main body 1 is mounted on a charging stand (not shown).
This charge is controlled by the charge control unit 19, and outputs this signal to the control unit 13 when the charge is completed.
[0026]
Next, the operation of each unit will be described based on the actual use procedure.
First, upon detecting a power-on signal from the power switch 10, the control unit 13 outputs a start signal to the timer unit 15, the ultrasonic transmitter 14, the vibrator motor 21, and the ion current control unit 20.
Upon detecting this signal, the timer unit 15 starts measurement for a predetermined time (for example, 3 minutes), and outputs an end signal to the control unit 13 after the measurement is completed.
[0027]
In addition, a drive current transmitted at an ultrasonic frequency (for example, 2 million Hertz) is applied to the ultrasonic transducer 8 by the ultrasonic transmitter 14 which has simultaneously detected the activation signal. Further, mechanical vibration is given to the main body 1 by driving the vibrating motor 21. In addition, the ion current control unit 20 that has detected the activation signal includes the plus electrode 11 that is an electrode unit provided on the outer surface of the main body and the vibration receiving plate 4 (partially exposed to the outside through the brush head unit 2A). A voltage is applied between the negative electrode and the negative electrode, thereby generating ions on the tooth surface.
[0028]
That is, the vibration receiving plate 4, the horn 3, the ion current control unit 20, the plus electrode 11 provided on the outer surface of the main body, and the power supply unit 16 are electrically connected to each other via a human body (for example, a human hand). It produces ions.
However, the current at the time of ion generation changes depending on the contact resistance between the tooth surface and the hand, and is controlled by the ion current control unit 20.
[0029]
Although the function as the ion toothbrush will be described later, the operation as the ultrasonic toothbrush will be described in more detail here.
The ultrasonic transducer 8 starts oscillating at a predetermined ultrasonic frequency by the drive current transmitted from the ultrasonic transmitter 14.
The vibration is transmitted to the horn 3 integrally attached to the ultrasonic vibrator 8 and then to the vibration receiving plate 4 integrated with the brush head 2A, as described later.
Here, the structural characteristics of the ultrasonic toothbrush will be described. The horn 3 extends upright from the ultrasonic vibrator 8 and protrudes outward from the head 9 of the main body 1.
[0030]
FIGS. 4A and 4B are partially cutaway views of the horn 3 protruding from the head 9 of the main body 1, wherein FIG. 4A is a partially cutaway plan view, and FIG. 4B is a partially cutaway side view.
The horn 3 is reduced in a certain range from the tip to become a reduced portion 3A (see FIG. 2), and has a semicircular cross section.
Here, a plurality of cutout grooves 3A2 such as a U-shaped groove or a V-shaped groove are formed in the arc-shaped portion of the reduced portion 3A, and the transmission efficiency of the ultrasonic wave is extremely improved due to the three cutout grooves 3A2. We have confirmed this through experiments.
It is preferable that at least one of the notch grooves is arranged at a position corresponding to the vibration receiving plate.
[0031]
By the way, the ultrasonic vibration must be efficiently and accurately transmitted from the main body 1 to the brush 2.
Therefore, the brush part 2 is detachably attached to the main body part 1 while being supported at two places, a first support place and a second support place.
The first support location is between the vicinity of the center of the head 9 of the main body 1 and the lower end of the brush 2.
[0032]
FIGS. 5 and 6 are a plan view and a side view showing a mounting relationship between the brush part 2 and the main body part 1 at the first support place.
FIG. 5 shows a state before press-fitting, and FIG. 6 shows a state after press-fitting.
The brush portion 2 is hollow and includes a brush head portion 2A having brush bristles 5, and a leg portion 2B extending slightly downward from the brush head portion 2A.
The hollow leg 2 </ b> B has a pair of tongues T at its ends, and the tongue T is externally press-fitted into the head 9 of the main body 1.
[0033]
The head 9 is formed so as to taper and extend forward from the main body 1 like a elephant nose. A pair of tongues T for receiving the pair of tongues T of the leg 2B is provided near the center outer periphery. Receiving groove G is formed.
When the head 9 of the main body 1 is inserted into the brush part 2, the tongue piece T of the leg part 2B of the brush part 2 is fitted into the receiving groove G from the outside and is attached in a press-fit state.
In addition, since the tongue piece T and the receiving groove G are meshed with each other, there is no loosening such as rotation between them.
When the head 9 is inserted into the brush portion 2, the tapered tongue T is naturally guided into the receiving groove G of the head 9, so that positioning is easy.
[0034]
On the other hand, the second support location is between the vibration receiving plate 4 integrally embedded and attached to the brush head 2A of the brush portion 2 and the tip of the horn 3 projecting from the ultrasonic vibrator 8. It is.
The ultrasonic vibrator 8 has a disk shape and is held at several places by a plurality of support pieces 91 rising from the head 9 of the main body 1.
When the horn 3 of the main body 1 is inserted into the brush head 2A of the brush part 2, the horn 3 must be in strong contact with the vibration receiving plate 4 embedded in the brush head 2A.
[0035]
Thus, the ultrasonic vibration is efficiently transmitted from the horn 3 to the vibration receiving plate 4 by the horn 3 being in strong contact with the vibration receiving plate 4.
Therefore, in the present invention, the rib-shaped protrusion P is provided on the inner wall of the brush head opposite to the position where the vibration receiving plate 4 is embedded.
The horn 3 is in a state where its tip is press-fitted and supported between the rib-shaped projection P and the vibration receiving plate 4.
Since the horn 3 is in contact with the rib-shaped projection P on the arc surface formed in the reduced portion 3A, the contact area between the two is extremely limited.
[0036]
FIGS. 7 and 8 show the relationship between the horn 3 and the vibration receiving plate 4 at the second support location.
FIGS. 7A and 7B are views showing a state before the horn 3 is press-fitted between the vibration receiving plate 4 and the rib-shaped projections P. FIG. 7A shows a longitudinal section, and FIG. 7B shows a BB section.
[0037]
FIGS. 8A and 8B are views showing a state after the horn 3 is press-fitted between the vibration receiving plate 4 and the rib-shaped projections P. FIG. 8A shows a longitudinal section, and FIG. 8B shows a BB section.
Since the tip of the horn 3 is a tapered portion 3A1 having an inclination, it serves as a guide when the horn 3 rides on the rib-shaped projection P.
Here, from the viewpoint of transmission of the ultrasonic vibration, since the horn 3 is in pressure contact with the rib-shaped projection P, transmission of the ultrasonic vibration is possible. However, the brush part 2 is connected to the main body via the long leg 2B. Due to the support at the part 1 and at the second support location, the transmission of vibrations is almost interrupted at this second support location.
[0038]
As described above, the main body portion 1 and the brush portion 2 are supported by the two positions of the first support position and the second support position, and do not touch each other.
In addition, at the second support location, the horn 3 only slightly touches the rib-shaped projection P and the vibration receiving plate 4 at the tip.
Incidentally, the horn 3 has its base fixed to the ultrasonic vibrator 8, and other than that, it does not contact the wall of the main body 1.
However, the portion where the horn 3 protrudes from the head end of the main body 1 is closed by a flexible packing 6 so that the liquid does not flow back into the main body through the gap in the brush head (FIG. 4). reference).
[0039]
For this reason, regarding the horn 3, the horn 3 is supported at only one location of the second support location, and the range of contact with other portions is extremely small.
As a result, the ultrasonic vibration is accurately and efficiently transmitted from the horn 3 to the vibration receiving plate 4 embedded in the brush head 2A, and the vibration energy is prevented from being diffused and attenuated.
Incidentally, even when vibration of the main body 1 is applied by the vibrating motor 21, the brush section 2 does not come off from the main body 1.
[0040]
The first supporting place serves to integrate the brush part 2 and the main body part 1 so as not to come off, and the second supporting place also serves to prevent the brush part 2 and the main body part 1 from coming off, and efficiently transmits ultrasonic vibration to the vibration receiving plate 4. It plays a role of communicating well.
Further, in the ultrasonic vibration transmission method, since the ultrasonic vibrator 8 as the vibration source and the horn 3 are integrated by, for example, soldering or the like, the ultrasonic vibration is transmitted through one joint point from the horn 3 to the vibration receiving plate 4. It can be seen that only the transmission is required, and the transmission efficiency of the ultrasonic vibration is improved as compared with the conventional ultrasonic toothbrush as described above.
[0041]
Now, the vibration receiving plate 4 of the brush portion 2 is embedded in the brush head portion 2A (usually formed of plastic) by insert integral molding. At this time, a projection is formed on a part of the vibration receiving plate 4. It is needless to say that the formation makes the integration of both more reliable.
Since at least a part of the vibration receiving plate 4 is exposed to the outside through the brush head 2A (the brush bristles are implanted in the exposed portion), the ultrasonic vibration is directly applied to the oral cavity. It is accurately transmitted to saliva and liquefied dentifrice inside to generate cavitation.
[0042]
Simultaneously, cavitation occurs, and as a result, the brush bristles 5 are finely vibrated, and a frictional action is generated between the brush bristles 5 in contact with the teeth and the teeth due to the minute vibrations.
As a result, the plaque adhering to the tooth surface is easily removed by weakening the bonding force to the tooth surface due to the cavitation effect and the frictional action.
[0043]
The above-mentioned operation of removing plaque by the cavitation effect is repeated. After a certain period of time, the control unit 13 receives an end signal from the timer unit 15 when a predetermined time has elapsed since the power was turned on. .
The ultrasonic transmitter 14 that is generating the drive current for the ultrasonic vibrator 8 stops generating the drive current in response to the transmission stop signal from the control unit 13 that has detected the end signal.
As a result, the vibration of the ultrasonic transducer 8 is stopped.
[0044]
Next, the ion generating function as an ion toothbrush will be described.
The present invention can also have a function as a substance having a negative ion action.
As shown in FIG. 1, an ion toothbrush is one that is conducted through a mouth between a main body portion 1 that is gripped by hand and a replaceable brush portion 2.
As described above, the portion of the main body 1 gripped by the hand is provided with the plus electrode 11 which is an electrode portion (for example, a metal plate) that comes into contact with the hand.
[0045]
The plus electrode 11 is preferably provided at a position on the outer surface of the main body, which is perpendicular to the direction in which the brush bristles are implanted, from the viewpoint of whether or not the positive electrode 11 easily comes into contact with the hand when grasped.
Here, when the main body 1 is grasped by hand, mechanical vibration is applied by the vibrator motor 21, so that the grasping force tends to be increased, and therefore, the main body 1 strongly contacts the positive electrode 11.
As a result, conduction of current is ensured as described below.
The positive electrode 11 serves as one electrode for passing a weak intraoral current, which will be described later, and is supplied with a power through an ion current control unit 20 which constitutes the ultrasonic signal generating means 7 disposed in the main body 1. It is conducted to the section 16.
[0046]
The conductive vibration plate 4 (for example, duralumin), which is a negative electrode, is electrically connected to the conductive horn 3 (for example, duralumin) of the main body 1 and the power supply unit 16 via the ion current control unit 20.
As described above, a part of the vibration receiving plate 4 is exposed to the outside from the brush head portion 2 </ b> A where a large number of brush bristles 5 are planted.
When the saliva and the liquefied dentifrice come into contact with the exposed vibration receiving plate 4, the positive electrode of the power source (via the ionic current control unit 20), the positive electrode 11 (see FIG. 1), the hand, and the gums (at least the teeth) A closed circuit of the negative pole of the vibration receiving plate 4, the horn 3, and the power supply (via the ion current control unit 20) is formed, and the current in the mouth flows as negative ions (see FIG. 9).
[0047]
This intraoral current loosens the bridging bonds with the tooth surface of plaque that has a tendency to ionize and makes it easier to separate.However, since cavitation is generated by the above-described ultrasonic vibration, the bridging bonds are more easily dissociated, and both actions are caused. The synergistic effect of
Therefore, the effect of more reliably removing the plaque due to the negative ions is exhibited.
It should be noted that, for example, tourmaline is blended into the brush bristles 5 so that pressure is applied to the brush bristles 5 from the ultrasonic vibration of the vibration receiving plate 4 via the body of the brush head portion 2A, so that the brush bristles 5 are efficiently processed. Negative ions are generated.
Further, negative ions are also generated by the shock wave due to cavitation being applied to the brush bristles 5.
[0048]
The present invention is not limited to the above-described embodiment, and various modifications are possible as long as the purpose is met.
For example, in the ultrasonic toothbrush of the present invention, various shapes can be selected for the shape of the main body containing the ultrasonic signal generating means in order to make it easy to grasp.
For example, for children, it is preferable to make it smaller than for adults and slightly larger than for infants.
Further, the ultrasonic signal generating means of the present invention is not limited to the one shown in FIG. 3, and for example, the power supply of the power supply unit may be a primary battery, a secondary battery, or an external power supply.
Further, the light emission color and the light emission method of the LED are not limited to this embodiment. In addition, it is naturally possible to use an induced electromotive force instead of the charging coil as the charging terminal.
[0049]
【The invention's effect】
As described above, the ultrasonic toothbrush of the present invention can remove plaque using the cavitation effect due to ultrasonic vibration.
Further, the transmission efficiency of the ultrasonic vibration is good, and the cavitation action is more effectively exhibited.
In addition, by making the vibrator motor realize the vibration, it is possible to strongly recognize the state of brushing the teeth.
[Brief description of the drawings]
FIG. 1 is an external view showing an ultrasonic toothbrush according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing the first half of the ultrasonic toothbrush, where (A) is a plan cross-sectional view and (B) is a side cross-sectional view.
FIG. 3 is a block diagram showing an ultrasonic signal generating means.
FIG. 4 is a partially cutaway view of the horn protruding from the head 9 of the main body 1, (A) is a partially cutaway plan view, and (B) is a partially cutaway side view. .
FIGS. 5A and 5B are diagrams showing a mounting relationship between a brush portion and a main body portion at a first support place before press-fitting, wherein FIG. 5A is a plan view and FIG. 5B is a side view.
FIGS. 6A and 6B are views after press-fitting showing a mounting relationship between the brush portion and the main body portion at a first support location, wherein FIG. 6A is a plan view and FIG. 6B is a side view.
FIGS. 7A and 7B are diagrams showing a state before the horn is press-fitted between the vibration receiving plate and the rib-shaped protrusions, wherein FIG. 7A shows a longitudinal section and FIG. 7B shows a BB section thereof.
FIGS. 8A and 8B are views showing a state after a horn is press-fitted between the vibration receiving plate and the rib-shaped protrusions, where FIG. 8A shows a longitudinal section and FIG. 8B shows a BB section thereof.
FIG. 9 is a diagram illustrating an ionic action.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Body part 2 ... Brush part 2A ... Brush head part 2B ... Leg part 3 ... Horn 3A ... Reduction part 3A1 ... Tapered part 3A2 ... Notch groove 4 ... Vibration receiving plate 5 ... Brush bristle 6 ... Flexible packing 7 ... Super Sound wave signal generating means 8 Ultrasonic transducer 9 Head 91 Support piece 10 Power switch 11 Positive electrode (electrode part)
DESCRIPTION OF SYMBOLS 13 ... Control part 14 ... Ultrasonic wave transmitter 15 ... Timer part 16 ... Power supply part 17 ... Rechargeable battery 18 ... Charge terminal 19 ... Charge control part 20 ... Ion current control part 21 ... Vibe motor G ... Receiving groove P ... Rib projection T ... tongue piece

Claims (9)

An ultrasonic signal generator, an ultrasonic oscillator that generates an ultrasonic wave based on a signal from the ultrasonic signal generator, a horn that transmits vibration from the ultrasonic oscillator, and a brush bristle. A brush part having a brush head with planted hair, a vibration receiving plate for receiving vibration from a horn in a state of being integrally fixed to the brush head part, and a vibrating motor for applying mechanical vibration to the main body, wherein the brush part is a main body. An ultrasonic toothbrush supported and detachably attached to two parts, a tip of a horn and a head of a main body. 2. The horn according to claim 1, wherein the horn has a reduced portion, and the reduced portion is pressed and attached between a rib-like projection formed on an inner wall portion of the brush head and the vibration receiving plate. The ultrasonic toothbrush as described. The tapered portion having an inclination is formed at the tip of the reduced portion of the horn, and the horn is easily guided on the rib-shaped protrusion by the tapered portion. Ultrasonic toothbrush. 3. The ultrasonic toothbrush according to claim 2, wherein the reduced portion of the horn has a semicircular cross section, and a plurality of cutout grooves are formed in the arc. The ultrasonic toothbrush according to claim 4, wherein there are three notched grooves, at least one of which is arranged at a position corresponding to the vibration receiving plate. The portion where the horn protrudes from the head end of the main body is sealed by a flexible packing so that the liquid does not flow back into the main body through a gap in the brush head. The ultrasonic toothbrush as described. The brush section has a brush head section and a hollow leg section extending slightly downward from the brush head section, and the leg section has a pair of tongue pieces at an end portion. 2. The ultrasonic toothbrush according to claim 1, wherein the piece is press-fitted from outside to a pair of receiving grooves formed in the head of the main body and attached. 2. The ultrasonic toothbrush according to claim 1, wherein the vibration receiving plate passes through the brush head and is exposed to the outside, and bristles are implanted in the exposed portion. 2. The ultrasonic toothbrush according to claim 1, further comprising an ion generating means, wherein an electrode portion of the ion generating means is provided at a position on an outer surface of the main body perpendicular to a direction in which the bristles are implanted. Ultrasonic toothbrush.

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