JP5184174B2 - Electric toothbrush - Google Patents

Description

  The present invention relates to an electric toothbrush.

  In an electric toothbrush, a rechargeable battery or the like is embedded in a body part that is gripped by a user, a mounting leg part that extends from the front end part of the body part, and is detachably attached to the mounting leg part in a fitting manner. It is common to have a brush part. Among such electric toothbrushes, there are ultrasonic toothbrushes using ultrasonic waves, ion toothbrushes using ionic current, and ultrasonic / ion toothbrushes using both ultrasonic waves and ionic currents.

In the ultrasonic toothbrush shown in Patent Document 1, an ultrasonic transducer is provided in the tip of the mounting leg, and the ultrasonic vibration generated by the ultrasonic transducer is transmitted from the mounting leg to the brush. What has been made to be disclosed is disclosed. In the ion toothbrush shown in Patent Document 2, the mounting leg portion is in the form of an elongated support shaft connected to the negative output terminal, while the through hole is formed in the side surface of the brush portion so that the brush portion is supported by the support shaft. In this case, the saliva of the user is brought into contact with the support shaft through the through hole when fitted to the support shaft. In the ultrasonic / ion toothbrushes shown in Patent Literature 3 and Patent Literature 4, the brush side electrode is provided at the tip of the brush portion so as to be exposed to the inside and outside of the brush, while the ultrasonic vibrator provided in the main body portion is used. A horn unit made of an integrally extending conductive member is disclosed in which ultrasonic vibration is transmitted to the outside through the brush side electrode so as to be in contact with the brush side electrode.
JP-A-2005-21399 JP 2001-309820 A JP 2004-41691 A JP 2004-41684 A

  By the way, among the electric toothbrushes, the main body part and the mounting leg part extending from the main part are used for a very long period of several years, but the brush part is a consumable item and has a certain period of use, for example, 1 to 3 months. It will be replaced with a new brush part. In addition, the brush portion is usually prepared for each individual. Accordingly, when a plurality of family members share an electric toothbrush, a substantial number of brush parts are exchanged per year as a whole.

  Since the brush part is a consumable item, it is preferable that the brush part be as inexpensive as possible. However, providing at least the function of an ion toothbrush with an ion electrode on the brush portion makes the brush portion extremely expensive. Moreover, as shown in Patent Document 2, in the ion toothbrush, when a through-hole through which saliva passes is opened in the brush portion, the chance that the ion electrode in the brush portion and the saliva of the user come into contact decreases. In other words, it is not preferable for performing an effective toothbrush by the ion effect. The brush part is inserted deep into the oral cavity and adheres to the user's saliva and dirt generated during the toothbrush, so that it is desirable that the brush part be clean, but there is no through hole at the tip of the brush part. In the type, it is difficult to sufficiently clean the inside of the brush portion. That is, when the brush portion has an opening only on the base end side for fitting to the mounting leg portion, it is difficult to circulate the cleaning liquid in the brush portion, and the brush portion extends from the base end side opening. It becomes difficult or troublesome to insert a thin cleaning rod deeply into the work area.

  The present invention has been made in consideration of the circumstances as described above, and its purpose is to provide a sufficient brushing effect in an electric toothbrush that obtains at least a function as an ion toothbrush, and to reduce the cost of the brush part. Another object of the present invention is to provide an electric toothbrush that can be provided and can easily clean the inside of the brush portion.

In order to achieve the above object, the following solution is adopted in the present invention. That is, as described in claim 1 in the claims,
A body part equipped with an ion current generating means inside and a hand side electrode connected to the ion current generating means exposed to the outside,
A mounting leg that is elongated from the tip of the main body and is equipped with a brush-side electrode connected to the ion current generating means at the tip;
A brush part detachably fitted to the outer periphery of the mounting leg part;
With
The brush side electrode is set to have a protruding portion that protrudes laterally from the outer peripheral surface of the tip end portion of the mounting leg,
When a through hole is formed in the side surface of the tip of the brush part and the brush part is fitted to the mounting leg, the protruding part of the brush side electrode is fitted in the through hole. Exposed to the outside,
It is like that.

  According to the above solution, since the protruding portion of the ion electrode is fitted into the through-hole formed in the brush portion, the ion electrode and the user's saliva are sufficiently secured, and the ion current is generated. This is preferable for sufficiently securing the used brushing effect. Moreover, since the brush part used as a consumable does not have a brush side electrode, it can be provided at low cost. Further, the brush portion has an opening on the base end side as in the conventional product, and has a through hole in the tip portion, so that cleaning is performed while circulating the cleaning liquid in the brush portion. In addition, since a cleaning rod or the like can be easily inserted into the brush portion through the through-hole, it is preferable for easily and effectively cleaning the brush portion. Furthermore, it is possible to increase the function of attaching the brush part to the mounting leg part by fitting the through hole and the protruding part of the ion electrode, and the brush part is not prepared from the mounting leg part during use. It is also preferable for preventing the situation of falling off.

A preferred mode based on the above solution is as described in claim 2 and the following claims. That is,
Ultrasonic signal generating means is equipped in the main body,
An ultrasonic transducer connected to the ultrasonic signal generating means is provided in the tip of the mounting leg.
(Corresponding to claim 2). In this case, tooth brushing using ultrasonic waves in addition to ion current can be performed, which is preferable for enhancing the tooth brushing effect. In addition, the ultrasonic vibrator and the brush-side electrode are positioned close to each other, which is preferable in effectively transmitting the vibration of the ultrasonic vibrator to the user's teeth and gums through the brush-side electrode.

On the back side of the brush side electrode, the ultrasonic transducer is integrated with the brush side electrode in an electrically conductive state,
The positive output terminal of the ultrasonic signal generating means is connected to the back side of the ultrasonic transducer and connected to the proximal electrode, while the negative output terminal of the ultrasonic signal generating means is connected to the brush side is connected to the electrode, ultrasonic signal generating means also serves as said ion current generating means,
(Corresponding to claim 3). In this case, the ultrasonic signal generating means is also used as the ionic current generating means, which is preferable in terms of simplifying the structure and manufacturing at low cost.

  The protruding portion of the brush side electrode is configured to be an inclined surface whose protruding amount gradually decreases toward the base end side of the mounting leg portion (corresponding to claim 4). In this case, the brush portion can be easily detached from the mounting leg portion using the inclined surface.

In a state where the brush portion is attached to the attachment leg portion, the protruding portion is positioned so as to fill the through hole, and the tip end surface thereof is flush with the outer surface of the brush portion.
(Corresponding to claim 5). In this case, the ion electrode is positioned over the entire area of the through-hole so that the chance of the ion electrode and the user's saliva coming into contact is increased, and the appearance is also improved.

  The through hole is formed on the surface of the brush portion where the bristles are integrated, and is formed in the immediate vicinity of the bristles (corresponding to claim 6). In this case, it is preferable in increasing the chance that the brush electrode contacts the saliva of the user.

  An oscillation plate is interposed between the ultrasonic transducer and the protrusion (corresponding to claim 7). In this case, the vibration of the ultrasonic transducer can be effectively transmitted from the oscillation plate to the brush side electrode, and the brush side electrode can be effectively used effectively as a transmission member for ultrasonic vibration.

  According to the present invention, it is preferable to sufficiently ensure the tooth brushing effect utilizing the ionic effect. Moreover, the brush part used as a consumable can be provided at low cost. Furthermore, the inside of a brush part can be wash | cleaned easily and effectively. Furthermore, it is also preferable for preventing a situation where the brush part is inadvertently detached from the mounting leg part during use.

  1-3, 10 is a main-body part, 20 is an attachment leg part, 30 is a brush part. The main body 10 and the mounting leg 20 are integrated with each other, and the mounting leg 20 extends from the tip of the main body 10 to be elongated. The brush part 30 is formed separately from the main body part 10 and the mounting leg part 20, and is detachably fitted to the outer periphery of the mounting leg part 20, and the fitted mounting state is shown in FIG. The removed state shown in FIGS. 1 to 4 and disengaged is shown in FIG. The main body part 10, the mounting leg part 20, and the brush part 30 are each formed of a synthetic resin as an insulating member. In addition, the main body part 10, the mounting leg part 20, and the brush part 30 can be integrated according to the radial direction after incorporating various devices and the like to be described later into the radially divided structure. .

  The main body 10 has a bottomed cylindrical shape in which the base end side is closed by integrating the front division member 10A and the rear division member 10B formed separately from each other. The main body 10 is roughly divided into a rechargeable battery 11, a charging coil 12 for supplying a charging current to the rechargeable battery 11 by electromagnetic induction, a control board 13, and a motor 17. The motor 17 is for giving a pseudo vibration (vibration whose frequency is sufficiently smaller than the ultrasonic vibration) to make the user (human body) holding the main body 10 feel the vibration. The weight 17a is attached eccentrically. Further, the main body 10 has an ON / OFF switch 14, a proximal electrode 15 serving as a positive electrode, and a lamp 16 formed of an LED positioned in the immediate vicinity of the switch 14 so as to be exposed to the outside. And the lamp | ramp 71 which consists of LED located in the immediate vicinity of the hand side electrode 15 is attached. The hand side electrode 15 is positioned so as to come into contact with the finger when the main body 10 is gripped with a finger for brushing teeth.

  As shown in FIGS. 5 to 9, an ultrasonic transducer 21 and a brush-side electrode 31 are provided at the tip of the mounting leg 20. That is, the mounting leg portion 20 is configured as an elongated hollow structure having a distal end closed and a proximal end opened in the main body portion 10, and the ultrasonic vibrator 21 is fixed in the distal end portion by an adhesive or the like. Yes. The ultrasonic vibrator 21 is composed of a known appropriate member (for example, piezoelectric ceramic), and is ultrasonically vibrated by applying a voltage between both surfaces (for example, 1,200,000 to 1,500,000 Hz).

  In the embodiment, the brush side electrode 31 is formed by bending a long and thin plate-like conductive member, and a protruding portion whose tip end side protrudes in the lateral direction (the radial direction of the mounting leg portion 20). 31a. The brush-side electrode 31 has a proximal end portion with respect to the surface of the ultrasonic transducer 21 that is longer than the protruding portion 31a and is integrated with a conductive adhesive over a long range (that is, over a wide area). It has become. In the embodiment, a synthetic resin as an insulating member constituting the mounting leg portion 20 is interposed between the protruding portion 31a and the ultrasonic transducer 21 (particularly referring to FIGS. 6 and 8). The part is indicated by reference numeral 20a). The projecting portion 31 a is exposed to the outside of the mounting leg portion 20. In addition, although various metal materials can be used for the brush side electrode 31, it is preferable to use a metal with high body corrosivity, such as stainless steel, for example.

  As shown in FIG. 5 in particular, the brush portion 30 has an elongated hollow structure in which the distal end is closed and the proximal end side is opened. The brush portion 30 has a head portion 30a in which brush hairs 34 are implanted and integrated on the side surface of the tip portion (a plurality of mounting recesses in which the brush hairs 34 are implanted are indicated by reference numeral 30b). A through hole 81 is formed in the head portion 30a. The through hole 81 corresponds to the protrusion 31a of the brush-side electrode 31 described above, and the shape (size) of the through hole 81 is substantially the same as the size of the protrusion 31a. Thereby, in a predetermined attachment state in which the brush portion 30 is fitted to the attachment leg portion 20, the protruding portion 31 a is fitted into the through hole 81 almost without backlash. In this fitted state, the tip end surface of the protruding portion 31 a is set to be flush with the peripheral edge portion of the through hole 81. In other words, the protruding portion 31 a constitutes a part of the outer surface of the brush portion 30.

  The protruding portion 31a of the brush side electrode 30 has a base end side surface as an inclined surface 31b. The inclined surface 31b is set so as to gradually become lower toward the proximal end portion of the mounting leg portion 20. That is, when the brush portion 30 is removed from the mounting leg portion 20, the protruding portion 31a smoothly comes out of the through hole 81 by the guide action by the inclined surface 31b. When the protruding portion 31a comes out of the through hole 81, the mounting leg portion 20 is elastically deformed toward the side opposite to the through hole 81, and the escape space that allows such elastic deformation is formed in the through hole. On the side opposite to the hole 81, it is secured between the mounting leg portion 20 and the brush portion 30.

  Here, at least the tip end portion of the mounting leg 20 where the brush-side electrode 31 is located is divided in the radial direction (vertical direction in FIG. 8) with, for example, the dotted line δ in FIG. The electrode 31 is integrally formed (a kind of cast-in), and then the ultrasonic vibrator 21 is integrated on the back side of the brush-side electrode 31, and then the other divided body is integrated with one divided body ( For example, fusion or integration by an adhesive can be performed. Even when the mounting leg portion 20 is formed separately from the main body portion 10, the brush-side electrode 31 can be integrally formed on one of the divided bodies as described above. By integrally forming the brush-side electrode 31 with respect to one of the divided bodies, it is preferable to prevent a situation in which liquid such as saliva enters the ultrasonic transducer 21 after assembly (seal) Ensuring sex). When the brush side electrode 31 is not integrally formed with one of the divided bodies, if a minute gap is formed between the brush side electrode 31 and the mounting leg portion 20, the gap is sealed with a sealing material. It is preferable to leave.

  FIG. 10 shows the electrical connection relationship of each component. In FIG. 10, the control board 13 includes functional units 18 and 61 to 65 that perform various functions. 61 is a charge control unit, and the charge control unit 61 controls charging from the commercial power source through the charging coil 12 to the rechargeable battery 11 and control of power consumption from the rechargeable battery 11. Reference numeral 62 denotes an ultrasonic oscillator serving as an ultrasonic signal generating means. The positive output terminal of the ultrasonic oscillator 62 is connected to the back side (brush side) of the proximal end portion of the ultrasonic transducer 21 via the connection cord 41. The electrode 31 is connected to the opposite side of the electrode 31 and is connected to the proximal electrode 15. Further, the minus output terminal of the ultrasonic oscillator 62 is connected to the proximal end portion of the brush electrode 31 via the connection cord 42. Since the ultrasonic vibrator 21 and the brush side electrode 31 are electrically connected, a negative voltage is applied to the surface side of the ultrasonic vibrator 21 via the brush side electrode 31. Reference numeral 65 denotes a voltage check unit that checks the voltage of the rechargeable battery 11.

  Reference numeral 64 denotes a main control unit. When the switch 14 is turned on, the main control unit 64 operates the ultrasonic transmitter 62, operates the ion current control unit 18, and turns on the lamp 16. Reference numeral 63 denotes a timer unit. The timer unit 63 counts a predetermined time (for example, 10 minutes) after the switch 14 is turned ON, and when the predetermined time is counted, the main control unit 63 64 stops the operation of the control units 62 and 18 and turns off the lamp 16 (the same applies when the switch 14 is turned off). Of course, the ion current control unit 18 controls the magnitude of the current flowing from the ultrasonic oscillator 62 to the proximal electrode 15 (the current generation itself for obtaining the ion action uses the ultrasonic oscillator 62). .

  For a method of using the ultrasonic ion toothbrush configured as described above, see Patent Document 3. Since it is the same as that of the case of patent document 4, it demonstrates easily. First, in use, the brush part 30 prepared for each individual is in a state of being fitted to the mounting leg part 20 (a state in which the protruding part 31a of the brush-side electrode 31 is fitted in the through hole 81). Although illustration is omitted, for example, an annular locking projection (or locking recess) formed on the outer peripheral surface of the base end portion of the mounting leg 20 is formed, while the inner peripheral surface of the base end portion of the brush portion 30 is formed. An annular locking recess (or locking projection) is formed, and the fitting operation between the locking projection and the locking recess gives a feeling of moderation to the attachment / detachment of the brush part 30 to the mounting leg 20. The state is surely maintained.

  Next, the switch 14 is operated to be turned on, and the brush bristles 34 are in contact with the teeth and gums in a state where the body part 10 is gripped so that the finger touches the hand side electrode 15, and tooth brushing may be performed. . When brushing teeth, the vibration of the ultrasonic vibrator 21 is effectively transmitted to the user's teeth and gums, particularly via the brush-side electrode 31. Further, when the saliva in the oral cavity comes into contact with the brush-side electrode 31 during brushing, an electric current flows between the proximal electrode 15 and the brush-side electrode 31 through the human body, and the ionic bond of the plaque is alleviated. Will be disassembled. Since the brush-side electrode 31 is set to be fitted in the through-hole 81 and positioned as far as possible in the oral cavity, the brush-side electrode 31 is surely brought into contact with the saliva in the oral cavity (more than the through-hole 81). In the retracted position, the chance of contact with saliva is reduced). By fitting the protruding portion 31 a into the through hole 81, the situation in which the brush portion 30 is inadvertently dropped from the mounting leg portion 20 can be more reliably prevented.

  After use, the inside of the brush unit 30 can be easily performed using running water or a thin cleaning stick (for example, a cotton swab). That is, for example, when running water such as tap water is introduced from the opening on the base end side of the brush portion 30, the running water is drained from the through hole 81, so that the running water is sufficiently circulated in the brush portion 30. Cleaning is done effectively. Further, cleaning can be performed by inserting a cleaning rod through the through hole 81. In this way, cleaning inside the brush unit 30 can be performed easily and effectively. Since the brush part 30 which becomes a consumable does not have the expensive ultrasonic transducer 21 or the brush side electrode 31, it can be manufactured (provided) at low cost.

  Details of the control by the charge control unit 61, the main control unit 64, the voltage check unit 65, and the like will be described below. First, the operation is started by pressing the switch 14 for a short time (less than 10 seconds), the ultrasonic transmitter 62 is operated, the ultrasonic vibration is generated by the ultrasonic vibrator 21, and the ultrasonic toothbrush. The function as is demonstrated. At this time, in a state where the user's finger is in contact with the hand side electrode 15, the saliva in the user's oral cavity is in contact with the brush side electrode 31, so that a weak current flows through the human body and functions as an ion toothbrush. Is demonstrated. When the ultrasonic transmitter 62 is activated, the lamp 16 is turned on (for example, blue). However, when the charged amount of the rechargeable battery 11 detected by the voltage check unit 65 falls below a predetermined lower limit value (for example, 20% or less and corresponds to 3.4 V or less), the lamp 16 blinks and the rechargeable battery 11 It is notified that the amount of power storage has decreased. Further, when a weak current flows through the human body, the lamp 71 is turned on (for example, blue), and it is easily confirmed whether or not the ion effect is obtained. If the switch 14 is pressed within a predetermined short time (for example, less than 10 seconds) while the ultrasonic transmitter 62 is activated, all the above-described operations are stopped.

  When the main body 10 is set in a charger to be described later and charging is performed using the charging coil 12, the lamp 16 is turned on (for example, red, and the lamp 16 includes two types of LEDs of different colors). . When the battery is fully charged, the lamp 16 is turned off.

  In the non-charged state, the switch 14 is shifted to the inspection mode by pressing the switch 14 for a predetermined long time (for example, 10 seconds or more). That is, in the state of entering the inspection mode, the following three modes are repeated every time the switch 14 is pressed for a short time. That is, the first mode is a first mode in which the ultrasonic oscillator 62 is operated to ultrasonically vibrate the ultrasonic vibrator 21, but the electrodes 15 and 31 are not energized and the motor 17 is not driven. This is a confirmation mode for checking whether or not the ultrasonic vibration is normally performed. The second mode is a mode in which the ultrasonic transducer 21 and the motor 17 are not operated, and is a mode for checking whether or not current flows between the electrodes 15 and 21 via the human body. The third mode is a mode in which the motor 17 is operated, but the operation of the ultrasonic transducer 21 is stopped, and the energization to the electrodes 15 and 31 is cut. Whether the motor 17 operates normally or not. Confirmation mode. During such an inspection mode, the switch 14 is pressed for a predetermined long time (for example, 10 seconds) to end the inspection mode and enter the normal mode (by pressing the switch 14 in a short time, (Return to a state where you can brush your teeth using sound waves and ion current). When the timer unit 63 measures that a predetermined time (for example, 10 minutes) has elapsed since the start of the inspection mode, all operations are automatically stopped.

  FIG. 11 shows a second embodiment of the present invention. The same components as those of the above-mentioned embodiment are denoted by the same reference numerals, and redundant description thereof is omitted. In the present embodiment, the oscillation plate 22 is interposed between the ultrasonic transducer 21 and the protruding portion 31a of the brush-side electrode 31 (a structure in which the portion indicated by reference numeral 20a is replaced with the oscillation plate 22). The oscillation plate 22 is made of a metal such as stainless steel or duralumin, and resonates when the ultrasonic transducer 21 is vibrated. The back surface (one surface) is electrically conductive with respect to the surface of the ultrasonic transducer 21. And the surface (other surface) is integrated with the back surface of the protruding portion 31a (as an integration method such as bonding with a conductive adhesive or soldering, as appropriate) Can be selected). By the resonance action by the oscillation plate 22, the ultrasonic vibration of the ultrasonic vibrator 21 is more effectively transmitted to the user's teeth and gums. The application of a negative voltage to the ultrasonic transducer 21 is performed from the brush side electrode 31 via the oscillation plate 22.

  12 and 13 show a third embodiment of the present invention. In the present embodiment, the ion current generator 18B is provided separately from the ultrasonic transmitter 62. That is, the ion current generation unit 18B is obtained by adding an ion current generation function in addition to the function of the ion current control unit 18 in the above embodiment, and the connection relationship between the ion current control unit 18B and the ultrasonic transducer 21 is as follows. It has been lost. That is, the ionic current control unit 18B has a positive output terminal connected to the proximal electrode 15 via the connection cord 91, and a negative output terminal connected to the brush electrode 31 via the connection cord 92. ing. The ultrasonic transmitter 62 has a positive output terminal connected to one surface side of the ultrasonic transducer 21 via the connection cord 93, and a negative output terminal connected to the ultrasonic vibration via the connection cord 94. The other side of the child 21 is connected. The ultrasonic transducer 21 and the brush side electrode 31 are insulated.

  FIG. 14 shows a fourth embodiment of the present invention. In this embodiment, there are no inclusions between the ultrasonic transducer 21 and the brush-side electrode 31, and the protruding portion 31a has a thick solid structure (the portion indicated by reference numeral 20a in FIG. 6). The structure corresponding to is also constituted by the brush-side electrode 31). In the present embodiment, the integration of the ultrasonic transducer 21 and the brush-side electrode 31 becomes stronger, and the ultrasonic vibration from the ultrasonic transducer 21 can be more effectively transmitted to the brush-side electrode 31. it can.

  FIGS. 15-21 shows an example of the charger 100 (charging stand) for charging the electric toothbrush by this invention. The charger 100 includes a main body portion 110 to which a power cord 101 connected to a commercial power source is connected, and a holding portion 120 that integrally extends upward from the main body portion 110. Three openings 121 to 123 are formed in the holding part 120, the main body part 10 is inserted and held in the opening part 121, and the other opening parts 122 and 123 are detached from the main body part 10. Only the brush portion 30 is inserted and held. The charger 100 is merely an example, and the shape and size thereof, the number of the brush portions 30 to be held, and the like can be appropriately changed.

  Although the embodiment has been described above, the present invention is not limited to the embodiment, and can be appropriately changed within the scope described in the scope of claims. For example, the invention includes the following cases. . What does not have the ultrasonic transducer | vibrator 21 may be sufficient. When the rear dividing member 10B constituting the main body 10 is separated from the front dividing member 10A, the control board 13 is electrically disconnected from the battery 11 and the charging coil 12 (disconnection of the connection cord). Good (ensures safety when disassembled). The main body 10 may be formed as a whole by one member, or may be divided into three or more in the longitudinal direction. Of course, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage.

The front view which shows an example of the toothbrush to which this invention was applied. The right view of FIG. The rear view of FIG. Sectional drawing of the toothbrush shown in FIG. Sectional drawing in the state which removed the brush part from the attachment leg part. Sectional drawing which shows the detail of the front-end | tip part of an attachment leg part. The right view of FIG. X8-X8 line equivalent sectional drawing of FIG. X9-X9 line equivalent sectional drawing of FIG. The figure which shows in block diagram the example of a control circuit of this invention. Sectional drawing which shows the 2nd Embodiment of this invention and respond | corresponds to FIG. Sectional drawing which shows the 3rd Embodiment of this invention and respond | corresponds to FIG. The figure which shows the example of a control circuit used for the 3rd Embodiment of this invention. Sectional drawing which shows the 4th Embodiment of this invention and respond | corresponds to FIG. The perspective view in the use condition which shows an example of a charger. The perspective view which shows the charger of FIG. The side view of the charger shown in FIG. Top view of the charger shown in FIG. The front view of the charger shown in FIG. The rear view of the charger shown in FIG. The bottom view of the charger shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10: Main-body part 11: Rechargeable battery 13: Control board 14: Switch 15: Hand side electrode 16: Lamp 17: Motor 18: Ion current control part (only current control)
18B: Ion current control unit (current generation + current control)
20: Mounting leg 20a: Interposition part (intervened between the ultrasonic transducer and the brush side electrode)
21: Ultrasonic vibrator 22: Oscillating plate 30: Brush part 31: Brush side electrode 31a: Protruding part 31b: Inclined surface 62: Ultrasonic transmitter 64: Main control part 81: Through hole 100: Charger

Claims (7)

A body part equipped with an ion current generating means inside and a hand side electrode connected to the ion current generating means exposed to the outside,
A mounting leg that is elongated from the tip of the main body and is equipped with a brush-side electrode connected to the ion current generating means at the tip;
A brush part detachably fitted to the outer periphery of the mounting leg part;
With
The brush side electrode is set to have a protruding portion that protrudes laterally from the outer peripheral surface of the tip end portion of the mounting leg,
When a through hole is formed in the side surface of the tip of the brush part and the brush part is fitted to the mounting leg, the protruding part of the brush side electrode is fitted in the through hole. Exposed to the outside,
An electric toothbrush characterized by that. In claim 1,
Ultrasonic signal generating means is equipped in the main body,
An ultrasonic transducer connected to the ultrasonic signal generating means is provided in the tip of the mounting leg.
An electric toothbrush characterized by that. In claim 2,
On the back side of the brush side electrode, the ultrasonic transducer is integrated with the brush side electrode in an electrically conductive state,
The positive output terminal of the ultrasonic signal generating means is connected to the back side of the ultrasonic transducer and connected to the proximal electrode, while the negative output terminal of the ultrasonic signal generating means is connected to the brush side is connected to the electrode, ultrasonic signal generating means also serves as said ion current generating means,
An electric toothbrush characterized by that. In any one of Claims 1 thru | or 3,
The electric toothbrush characterized by the said protrusion part of the said brush side electrode being made into the inclined surface where the protrusion amount becomes small gradually as it goes to the base end part side of the said attachment leg part. In any one of Claims 1 thru | or 4,
In a state where the brush portion is attached to the attachment leg portion, the protruding portion is positioned so as to fill the through hole, and the tip end surface thereof is flush with the outer surface of the brush portion.
An electric toothbrush characterized by that. In any one of Claims 1 thru | or 5,
The electric toothbrush characterized by the said through-hole being formed in the surface in which the bristle is integrated in the said brush part, and being formed in the immediate vicinity of this bristle. In any one of Claims 2 thru | or 6,
An electric toothbrush characterized in that an oscillation plate is interposed between the ultrasonic transducer and the protrusion.

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