WO2023276447A1 - 電動歯ブラシ - Google Patents

電動歯ブラシ Download PDF

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Publication number
WO2023276447A1
WO2023276447A1 PCT/JP2022/019666 JP2022019666W WO2023276447A1 WO 2023276447 A1 WO2023276447 A1 WO 2023276447A1 JP 2022019666 W JP2022019666 W JP 2022019666W WO 2023276447 A1 WO2023276447 A1 WO 2023276447A1
Authority
WO
WIPO (PCT)
Prior art keywords
replacement
electrode
main body
longitudinal direction
electric toothbrush
Prior art date
Application number
PCT/JP2022/019666
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
玲央奈 野田
慶貴 大野
Original Assignee
ライオン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ライオン株式会社 filed Critical ライオン株式会社
Priority to JP2023531479A priority Critical patent/JPWO2023276447A1/ja
Publication of WO2023276447A1 publication Critical patent/WO2023276447A1/ja

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B15/00—Other brushes; Brushes with additional arrangements
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/222—Brush body details, e.g. the shape thereof or connection to handle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor

Definitions

  • the present invention relates to electric toothbrushes.
  • This application claims priority based on Japanese Patent Application No. 2021-108778 filed in Japan on June 30, 2021, the content of which is incorporated herein.
  • An electric toothbrush generally adopts a configuration in which a motor built into the main body vibrates a shaft (shaft), and a replaceable brush engaged with the shaft vibrates.
  • Patent Literature 1 discloses a configuration in which the replaceable brush is not engaged with the main body but is engaged only with the shaft so that the replaceable brush can vibrate to the maximum in accordance with the vibration of the motor. As a result, in the electric toothbrush disclosed in Patent Literature 1, the replacement brush and the main body are not tightly engaged, so vibration of the replacement part is ensured.
  • Patent Document 2 discloses a structure in which electricity is supplied from the main body to the replacement part. In the case of this structure, the repositioning portion and the main body portion are tightly engaged for energization.
  • the present invention has been made in consideration of the above points. To provide an electric toothbrush capable of vibrating to
  • Aspect 1 of the present invention is a main body having a power source, and is provided with a shaft that extends in the longitudinal direction and protrudes toward the distal end side in the longitudinal direction and vibrates with electric power from the power source, and constitutes at least a part of the grip portion. and
  • the body portion is detachably fitted to the distal end side of the body portion in the longitudinal direction, and vibration is transmitted when the body portion is fitted to the body portion, and at least a head portion having a brush portion is configured.
  • a power toothbrush comprising: Aspect 1 of the present invention included in the above configuration is a body portion having a power source, provided with a shaft that extends in the longitudinal direction and protrudes toward the distal end side in the longitudinal direction and vibrates with power from the power source, and at least holds the and the main body portion constituting a part of the main body portion, and the distal end side of the main body portion in the longitudinal direction is detachably connected to the main body portion, and when connected to the main body portion, vibration is transmitted to the brush.
  • a replacement part that constitutes at least a head part having a part, one of the main body part and the replacement part is separated from one of the main body part and the replacement part in the longitudinal direction, Further, it has a pedestal portion having a first electrode connected by a flexible electrical wiring, and the other of the main body portion and the changeable portion is connected to the main body portion when the changeable portion is connected to the main body portion. and a second electrode connected to the first electrode, wherein the first electrode and the second electrode are electrically connected to the power supply when connected to each other. is provided.
  • Aspect 2 of the present invention is the electric toothbrush according to Aspect 1, wherein an elastically deformable at least in a rotational direction about the longitudinal direction is provided between one of the main body portion and the replacement portion and the pedestal portion.
  • a flexible member is provided.
  • Aspect 3 of the present invention is the electric toothbrush according to Aspect 2, wherein the longitudinal end surface of the soft member is in contact with one of the main body portion and the replacement portion and a part of the base portion.
  • Aspect 4 of the present invention is the electric toothbrush according to Aspect 3, wherein the shaft penetrates through the soft member in the longitudinal direction without contact, and the soft member is connected to one of the main body portion and the replacement portion. , and are in contact with both of the pedestals in an annular shape centered on the shaft.
  • Aspect 5 of the present invention is the electric toothbrush according to any one of Aspects 2 to 4, wherein the soft member has a thickness of 0.5 mm or more and 5 mm or less in the longitudinal direction, and It is characterized by having a hardness of 1 or more and 50 or less.
  • Aspect 6 of the present invention is the electric toothbrush according to any one of Aspects 1 to 5, wherein one of the main body portion and the replacement portion is the main body portion, and the base portion extends in the longitudinal direction.
  • the first electrode is arranged facing the distal end side and is electrically connected to the power supply via the electrical wiring, and is fixed to the distal end portion of the shaft.
  • the second electrode is arranged at a position facing the rear end side in the axial direction and facing the first electrode.
  • Aspect 7 of the present invention is the electric toothbrush according to Aspect 6, wherein the pedestal portion has a fitting recess that opens toward the distal end side in the longitudinal direction and is recessed toward the rear end side, and the replacement portion includes: It has a fitting protrusion extending to the rear end side in the longitudinal direction and can be fitted with the fitting recess, the first electrode is provided on an inner wall of the fitting recess, and the second electrode is provided on the fitting recess. It is characterized by being provided on the outer surface of the joint projection.
  • Aspect 8 of the present invention is the electric toothbrush according to Aspect 6 or 7, wherein the shaft has a non-contact portion that is in contact with the pedestal portion, synchronizes the vibration with the pedestal portion, and does not contact the main body portion; It is characterized in that the main body and the vibration are not synchronized.
  • Aspect 9 of the present invention is the electric toothbrush according to any one of Aspects 1 to 5, wherein one of the main body portion and the replacement portion is the replacement portion, and the base portion extends in the longitudinal direction. and has the first electrode connected to the replacement portion via the electrical wiring, and the body portion faces the distal end side in the longitudinal direction and faces the first electrode.
  • the second electrode is arranged at a position facing the first electrode and electrically connected to the power supply.
  • the main body portion has a fitting recess that opens toward the distal end side in the longitudinal direction and is recessed toward the rear end side, and the pedestal portion It has a fitting convex portion that extends to the rear end side in the longitudinal direction and can be fitted with the fitting concave portion, the first electrode is provided on the outer surface of the fitting convex portion, and the second electrode is fitted. It is provided on the inner wall of the joint recess.
  • Aspect 11 of the present invention is the electric toothbrush according to Aspect 9 or 10, wherein the electric toothbrush has a non-contact portion that does not come into contact with the pedestal portion, does not synchronize the vibration with the pedestal portion, and is in contact with the replacement portion and replaces the replacement portion. synchronizing the portion and the vibration;
  • a twelfth aspect of the present invention is the electric toothbrush according to any one of Aspects 1 to 11, wherein the replacement portion has a functional portion that exerts an action related to oral hygiene that is different from the vibration when energized from the power source. characterized by
  • a thirteenth aspect of the present invention is the electric toothbrush according to any one of Aspects 1 to 12, further comprising a motor that applies the vibration to the shaft with the electric power, and the changing portion has a frequency of 25000 rpm or more and 50000 rpm.
  • A° is the vibration angle of the motor and B° is the vibration angle of the replacement portion, the value represented by B/A is 0.3 or more and 0.8 or less.
  • the replacement part can vibrate stably and sufficiently.
  • FIG. It is a figure which shows the schematic structure of the electric toothbrush 1 which concerns on 1st Embodiment.
  • 3 is an exploded view showing a replacement part 30 and a pedestal part 40.
  • FIG. It is a figure which shows the 1st modification of the electric toothbrush 1 of 1st Embodiment. It is a figure which shows the 2nd modification of the electric toothbrush 1 of 1st Embodiment. It is a figure which shows the 3rd modification of the electric toothbrush 1 of 1st Embodiment. It is a figure which shows the schematic structure of the electric toothbrush 1 which concerns on 2nd Embodiment.
  • FIG. 10 is a diagram showing a second modification of the electric toothbrush 1 of the second embodiment, and is an enlarged view in which a replacement part 30 and a base part 40 are disassembled. It is a figure which shows the schematic structure of the electric toothbrush 1 which concerns on 3rd Embodiment.
  • FIG. 3 is an enlarged view in which the replacement part 30 and the main body part 10 are disassembled;
  • FIG. 1 An embodiment of an electric toothbrush of the present invention will be described below with reference to FIGS. 1 to 10.
  • FIG. The following embodiments show one aspect of the present invention, do not limit the present invention, and can be arbitrarily changed within the scope of the technical idea of the present invention. Also, in the drawings below, in order to make each configuration easier to understand, the actual structure and each structure are different in scale, number, and the like.
  • FIG. 1 is a diagram showing a schematic configuration of an electric toothbrush 1.
  • the electric toothbrush 1 includes a body portion 10 and a replacement portion 30 .
  • the body portion 10 and the replacement portion 30 are arranged side by side in the longitudinal direction of the electric toothbrush 1 .
  • the side on which the replacement portion 30 is arranged is defined as the leading end side
  • the side on which the main body portion 10 is arranged is defined as the rear end side in the longitudinal direction.
  • the body part 10 constitutes at least part of the grip part.
  • the body portion 10 of the present embodiment constitutes the grip portion of the electric toothbrush 1, but may include at least a portion of the neck portion connecting the grip portion and the head portion in addition to the grip portion.
  • the body section 10 has a housing 11, a motor 12, a power supply 14, a circuit section 15, and a pedestal section 40.
  • the body portion 10 is provided with a shaft 13 whose tip side protrudes from the body portion 10 toward the tip side in the longitudinal direction.
  • the housing 11 accommodates the motor 12, the power supply 14, and the circuit section 15 inside.
  • the shape of the housing 11 is not particularly limited as long as it can be gripped by the user and the inside can be liquid-tightly sealed, but for example, a cylindrical shape or a rectangular tubular shape can be selected.
  • the motor 12 vibrates the shaft 13 with electric power from the power supply 14 connected via the circuit section 15 .
  • the motor 12 of this embodiment vibrates the shaft 13 in a rotational direction about an axis extending in the longitudinal direction.
  • the power supply 14 of this embodiment is a DC power supply.
  • a dry battery, a button battery, a rechargeable battery, or the like can be selected.
  • the circuit section 15 has a first conductive section 21 and a second conductive section 22 .
  • the first conductive portion 21 is wiring that connects the positive electrode of the power source 14 to the motor 12 and a first electrode 52 (details will be described later).
  • the first conductive portion 21 includes an electrical wiring 21A.
  • the electric wiring 21A is electrically connected to the positive electrode of the power supply 14 .
  • the electrical wiring 21A has flexibility.
  • the electric wiring 21A of the present embodiment is a wire material in which a conducting wire is covered with an insulating material.
  • the electric wiring 21A is drawn out from the housing 11 to the tip side.
  • An electric wiring 21A drawn out from the housing 11 is connected to the first electrode 52 .
  • the second conductive portion 22 is wiring that connects the negative electrode of the power supply 14 to the motor 12 and the first electrode 62 (details will be described later).
  • the second conductive portion 22 includes an electrical wiring 22A.
  • the electric wiring 22A is electrically connected to the negative electrode of the power supply 14. As shown in FIG.
  • the electrical wiring 22A has flexibility. 22 A of electric wirings of this embodiment are the wires which the conductor was coat
  • the electric wiring 22A is pulled out from the housing 11 to the tip side.
  • the electric wiring 22A drawn out from the housing 11 is connected to the first electrode 62 .
  • the shaft 13 is driven by the motor 12 and vibrates in the rotational direction.
  • the shaft 13 has an axial shape extending in the longitudinal direction.
  • the tip side of the shaft 13 protrudes further to the tip side than the tip-side end of the body portion 10 .
  • a shaft 13 embedded in the main body 10 is liquid-tightly fitted to the main body 10 .
  • the shaft 13 protruding from the body portion 10 is fitted to the pedestal portion 40 at its tip.
  • at least the cross-sectional shape perpendicular to the longitudinal direction of the shaft 13 fitted to the pedestal portion 40 is a D shape in which a portion of the circle is cut out by a chord.
  • the rear end side of the shaft 13 is rotatably and liquid-tightly fitted to the body portion 10 .
  • the pedestal portion 40 is arranged with a gap S on the distal end side of the main body portion 10 in the longitudinal direction.
  • the pedestal portion 40 is coaxial with the shaft 13 and has a disc shape with substantially the same diameter as the outer diameter of the housing 11 .
  • FIG. 2 is an exploded view showing the replacement part 30 and the pedestal part 40. As shown in FIG. As shown in FIG. 2, the pedestal 40 has a fitting hole 41, fitting recesses 42 and 43, and first electrodes 52 and 62. As shown in FIG.
  • the fitting hole 41 is coaxial with the shaft 13 and penetrates in the longitudinal direction.
  • the cross-sectional shape of the fitting hole 41 perpendicular to the major axis direction is a D-shape in which a portion of the circle is notched with a string so that the fitting hole 41 fits over the entire circumference of the outer peripheral surface of the tip portion of the shaft 13 .
  • the tip of the shaft 13 is fitted into and fixed to the fitting hole 41 .
  • a method of fixing the tip portion of the shaft 13 to the fitting hole 41 a method of fixing with an adhesive, or a method of inserting the shaft 13, molding the base portion 40, and completely adhering it can be adopted.
  • the shaft 13 and the base portion 40 are positioned relative to each other in the rotation direction of the shaft 13 .
  • the shaft 13 and the base portion 40 vibrate integrally in the rotational direction.
  • the fitting recess 42 is arranged on one side of the fitting hole 41 in the direction perpendicular to the longitudinal direction.
  • the fitting recess 42 is open on the front end side in the longitudinal direction and is recessed on the rear end side.
  • a first electrode 52 is provided on the bottom wall of the inner wall of the fitting recess 42 .
  • the first electrode 52 is connected to the distal end side of the electric wiring 21A that penetrates the base portion 40 in the longitudinal direction. That is, the first electrode 52 is electrically connected to the positive electrode of the power supply 14 via the electrical wiring 21A and the first conductive portion 21. As shown in FIG.
  • the fitting recess 43 is arranged on the other side of the fitting hole 41 in the direction perpendicular to the longitudinal direction.
  • the fitting recesses 42 and the fitting recesses 43 are arranged symmetrically about the fitting hole 41 .
  • the fitting recess 43 is open on the front end side in the longitudinal direction and is recessed on the rear end side.
  • a first electrode 62 is provided on the bottom wall of the inner wall of the fitting recess 43 .
  • the first electrode 62 is connected to the distal end side of the electric wiring 22A that penetrates the base portion 40 in the longitudinal direction. That is, the first electrode 62 is electrically connected to the negative electrode of the power supply 14 via the electrical wiring 22A and the second conductive portion 22. As shown in FIG.
  • the replacement part 30 is detachably connected to the main body part 10 .
  • the replacement portion 30 can be replaced (replaced) with respect to the main body portion 10 .
  • the replacement part 30 has a brush part 31 on the tip side.
  • the replacement section 30 constitutes at least a head section having a brush section 31 .
  • the brush portion 31 extends in a direction perpendicular to the longitudinal direction.
  • the contour of the replacement portion 30 has a neck portion that gradually widens from the head portion toward the rear end side. The maximum diameter of the rear end of the neck portion is substantially the same as the outer diameter of the pedestal portion 40 .
  • the replacement part 30 has a functional part 32 , second electrodes 34 and 35 and fitting convex parts 36 and 37 .
  • the function part 32 expresses an action related to oral hygiene that is different from vibration when energized from the power supply.
  • the functional unit 32 is, for example, an electronic component that exhibits the above effects. Actions different from the vibration generated by the functional unit 32 include, for example, heat, light (ultraviolet light, visible light, infrared light), radio waves (radio waves), vibration (piezoelectric element), and electricity.
  • the fitting projection 36 extends to the rear end side in the longitudinal direction and is arranged at a position opposed to the fitting recess 42 in the longitudinal direction.
  • the fitting protrusion 36 can be fitted with the fitting recess 42 .
  • the second electrode 34 is provided on the end surface facing the rear end side of the outer surface of the fitting convex portion 36 .
  • the second electrode 34 is electrically connected to the functional section 32 via the first wiring 38 .
  • the first electrode 52 and the second electrode 34 are connected to each other, It is electrically connected to the positive electrode of the power source 14 via the electrical wiring 21A and the first conductive portion 21 .
  • the functional portion 32 is electrically connected to the positive electrode of the power supply 14 via the first wiring 38, the second electrode 34, the first electrode 52, the electric wiring 21A and the first conductive portion 21.
  • the fitting projection 37 extends to the rear end side in the longitudinal direction and is arranged at a position facing the fitting recess 43 in the longitudinal direction.
  • the fitting convex portion 37 can be fitted with the fitting concave portion 43 .
  • the second electrode 35 is provided on the end face on the rear end side of the outer surface of the fitting protrusion 37 .
  • the second electrode 35 is electrically connected to the functional section 32 via a second wiring 39 .
  • the pedestal portion 40 does not have the first electrodes 52 and 62 and the fitting concave portions 42 and 43, and the replacement portion 30 has the second electrodes 34 and 35 and the fitting convex portions 36 and 37. It is also possible to employ a configuration in which the portion 40 has the first electrodes 52 and 62 and fitting projections, and the replacement portion 30 has the second electrodes 34 and 35 and fitting recesses. However, if this configuration is adopted, there is a possibility that the neck portion will be thickened to ensure the thickness when the fitting recess is formed in the replacement portion 30, resulting in reduced usability. Therefore, it is preferable from the viewpoint of usability that the replacement part 30 has the fitting projections 36 and 37 and the pedestal part 40 has the fitting recesses 42 and 43 .
  • the fitting convex portions 36 and 37 of the replacement portion 30 are inserted into the fitting concave portions 42 and 43 of the base portion 40 and fitted.
  • the replacement part 30 is connected to the main body part 10 .
  • the second electrode 34 is connected to the first electrode 52 and electrically connected to the positive electrode of the power source 14 via the electric wiring 21A and the first conductive portion 21 .
  • the second electrode 35 is connected to the first electrode 62 and electrically connected to the negative electrode of the power source 14 via the electrical wiring 22A and the second conductive portion 22 .
  • the shaft 13, the pedestal portion 40, and the replacement portion 30 are integrally rotated in a state in which a gap S is provided with respect to the main body portion 10. vibrate in sync with
  • the functional unit 32 exhibits an action different from vibration due to the energization from the power supply 14 .
  • the electrical wirings 21A and 22A vibrate in the rotational direction together with the pedestal 40.
  • the flexible electrical wirings 21A and 22A bend, which hinders the conduction of electricity. No.
  • the vibration frequency of the replacement part 30 is preferably 25000 rpm or more and 50000 rpm or less.
  • the lower limit of the vibration frequency of the replacement part 30 is preferably 25000 rpm or more.
  • the upper limit of the vibration frequency of the replacement part 30 is preferably 50000 rpm or less. If the vibration frequency of the replacement part 30 is less than 25000 rpm, the cleaning power may be lowered. If the frequency of the replacement part 30 exceeds 50,000 rpm, there is a possibility that damage to the gums will occur.
  • By setting the vibration frequency of the replacement part 30 to 25000 rpm or more and 50000 rpm or less it is possible to secure a cleaning power and suppress damage to the gums.
  • the value represented by B/A is preferably 0.3 or more and 0.8 or less.
  • the lower limit of the value represented by B/A is preferably 0.3 or more.
  • the upper limit of the value represented by B/A is preferably 0.8 or less. If the value represented by B/A is less than 0.3, there is a possibility that the feeling of cleaning may deteriorate. If the value represented by B/A exceeds 0.8, discomfort such as pain may occur during use. By setting the value represented by B/A to 0.3 or more and 0.8 or less, it is possible to improve the feeling of cleaning and suppress discomfort during use.
  • the replacement portion 30 and the main body portion 10 are closely engaged, the replacement portion is stably and sufficiently It is possible to vibrate. Further, in the electric toothbrush 1 of the present embodiment, since the first electrodes 52 and 62 of the pedestal portion 40 that vibrates together with the replacement portion 30 are energized via the flexible electrical wiring 21A and the electrical wiring 22A, Even when a structure is adopted in which electric power is supplied from the main body 10 to the replacement section 30, the replacement section 30 can sufficiently vibrate.
  • the pedestal portion 40 having a complicated structure and a plurality of members is provided in the main body portion 10 , so that when the pedestal portion 40 is provided in the replacement portion 30
  • the neck part becomes thicker in order to secure the thickness of the replacement part 30, and usability is deteriorated. there is a possibility.
  • the pedestal portion 40 is provided on the main body portion 10, deterioration in usability can be suppressed.
  • the vibration of the motor 12 is effectively transmitted to the replacement portion 30 without being reduced. be able to.
  • FIG. 3 is a diagram showing a first modification of the electric toothbrush 1 of the first embodiment.
  • a hole 11 a that is coaxial with the shaft 13 and has a larger diameter than the shaft 13 is provided on the distal end side of the motor 12 in the main body 10 .
  • a shaft 13 is inserted through the hole 11a in a non-contact manner. That is, the shaft 13 has a non-contact portion 13a which is surrounded by the hole portion 11a and does not come into contact with the main body portion 10.
  • FIG. 3 is a diagram showing a first modification of the electric toothbrush 1 of the first embodiment.
  • a hole 11 a that is coaxial with the shaft 13 and has a larger diameter than the shaft 13 is provided on the distal end side of the motor 12 in the main body 10 .
  • a shaft 13 is inserted through the hole 11a in a non-contact manner. That is, the shaft 13 has a non-contact portion 13a which is surrounded by the hole portion 11a and does not come into contact with the main body portion 10.
  • the shaft 13 is in contact with the pedestal 40 and vibrates in synchronization with the pedestal 40 .
  • the vibration is not synchronized with that of the main body portion 10 . Therefore, the vibration of the shaft 13 can be transmitted to the base portion 40 without being attenuated by the joint with the main body portion 10 .
  • FIG. 4 is a diagram showing a second modification of the electric toothbrush 1 of the first embodiment.
  • a projection 40a extending from the outer peripheral portion of the pedestal portion 40 toward the rear end side is provided over the entire circumference.
  • a gap is formed between the tip of the projection 40a and the body portion 10 in the longitudinal direction.
  • the amount of clearance in the long axis direction is a value at which the pedestal portion 40 does not come into contact with the main body portion 10 during use (during brushing).
  • FIG. 5 is a diagram showing a third modification of the electric toothbrush 1 of the first embodiment.
  • a projection 30a extending from the outer peripheral portion of the main body portion 10 toward the distal end side is provided over the entire circumference.
  • a gap is formed between the tip of the projection 30a and the base portion 40 in the longitudinal direction.
  • the amount of clearance in the long axis direction is a value at which the pedestal portion 40 does not come into contact with the main body portion 10 during use (during brushing).
  • the electrical wiring 21A is liquid-tightly covered with a sealing material 21B such as a rubber tube.
  • the electrical wiring 22A is liquid-tightly covered with a sealing material 22B such as a rubber pipe.
  • the same functions and effects as in the second modified example can be obtained, and since the electrical wirings 21A and 22A are liquid-tightly covered with the sealing materials 21B and 22B, short circuits can be suppressed. become.
  • the covering of the electrical wirings 21A and 22A with the sealing materials 21B and 22B can also be applied to the first embodiment, the first modification, and the second modification.
  • FIG. 6 is a diagram showing a schematic configuration of the electric toothbrush 1 according to the second embodiment.
  • the same reference numerals are assigned to the same elements as those of the first embodiment shown in FIGS. 1 and 2, and the description thereof will be omitted.
  • the electric toothbrush 1 of the second embodiment is provided with a soft member 50 between the main body portion 10 and the pedestal portion 40 .
  • the flexible member 50 has a disc shape centered on the shaft 13 .
  • a longitudinal end surface of the flexible member 50 contacts the main body 10 and a part of the base 40 .
  • interposing the soft member 50 between the main body portion 10 and the base portion 40 can suppress the tilting of the replacement portion 30 and the base portion 40 with respect to the longitudinal direction during vibration. Therefore, in the present embodiment, it is possible to prevent the replacement portion 30 and the pedestal portion 40 from tilting with respect to the longitudinal direction and the shaft 13 from breaking when vibrating.
  • the soft member 50 is in contact with the main body 10 and part of the pedestal 40, so that the gap between the soft member 50 and the main body 10 and the gap between the flexible member 50 and the pedestal 40 Intrusion of liquid can be suppressed.
  • the flexible member 50 is elastically deformable at least in the direction of rotation about the longitudinal direction.
  • the thickness of the flexible member 50 in the longitudinal direction is preferably 0.5 mm or more and 5 mm or less.
  • the lower limit of the thickness of the flexible member 50 in the longitudinal direction is preferably 0.5 mm or more.
  • the upper limit of the thickness of the flexible member 50 in the longitudinal direction is preferably 5 mm or less. If the thickness of the flexible member 50 in the major axis direction is less than 0.5 mm, the amount of deformation of the flexible member 50 in the rotational direction is small when the pedestal 40 vibrates, possibly suppressing the vibration of the pedestal 40 . be.
  • the thickness of the flexible member 50 in the longitudinal direction exceeds 5 mm, the amount of deformation of the flexible member 50 in the direction of rotation increases, and the shaft 13 tends to break. usability is reduced because the distance of By setting the thickness of the flexible member 50 in the longitudinal direction to 0.5 mm or more and 5 mm or less, it is possible to suppress the bending of the shaft 13 and the decrease in usability without suppressing the vibration of the pedestal portion 40 .
  • the soft member 50 is made of soft resin.
  • the soft resin for example, it is preferable to use a soft resin having a JIS K 7215 Shore A hardness of 1 or more and 50 or less.
  • the lower limit of the hardness of soft resin 1 or more is preferable.
  • the upper limit of hardness of the soft resin is preferably 50 or less.
  • the hardness of the flexible member 50 exceeds 50, the amount of deformation of the flexible member 50 is small when the pedestal 40 vibrates, possibly suppressing the vibration of the pedestal 40 .
  • the hardness of the soft resin By setting the hardness of the soft resin to 1 or more and 50 or less, it is possible to suppress axial breakage of the shaft 13, fatigue and impact during use, and suppress vibration of the pedestal portion 40.
  • soft resins examples include elastomer resins such as polyolefin elastomers, styrene elastomers, polyester elastomers, polyurethane elastomers, and silicone resins.
  • elastomer resins such as polyolefin elastomers, styrene elastomers, polyester elastomers, polyurethane elastomers, and silicone resins.
  • the flexible member 50 has a hole 50a which is coaxial with the shaft 13 and penetrates in the longitudinal direction.
  • the diameter of hole 50 a is larger than the diameter of shaft 13 .
  • the shaft 13 is inserted through the hole 50a in a non-contact manner with respect to the flexible member 50. As shown in FIG. Since the shaft 13 is not in contact with the flexible member 50 , the vibration of the shaft 13 can be efficiently transmitted to the pedestal portion 40 without being attenuated by contact with the flexible member 50 . Even when adopting this configuration, the flexible member 50 is in contact with the body portion 10 and the base portion 40 on the radially outer side of the hole portion 50a to maintain waterproofness. Intrusion of liquid can be suppressed.
  • the shaft 13 and the hole portion 50a may be liquid-impregnated.
  • a configuration may be adopted in which liquid is prevented from entering the main body 10 by being tightly fitted.
  • the form of contact of the flexible member 50 with the pedestal portion 40 is contact with a part or the entire surface of the end face of the flexible member 50 on the tip side.
  • the contact area between the soft member 50 and the pedestal portion 40 is large, it is preferable that the hardness of the soft resin is low because vibration is suppressed if the hardness of the soft resin is high.
  • the contact area between the flexible member 50 and the base portion 40 is small, the hardness of the soft resin is preferably high because the function of preventing the shaft 13 from breaking can not be exhibited if the hardness of the soft resin is low.
  • the form of contact of the flexible member 50 with the main body 10 is contact with a part or the entire surface of the rear end side of the flexible member 50 .
  • the hardness of the soft resin is preferably low because vibration is suppressed if the hardness of the soft resin is high.
  • the hardness of the soft resin is preferably high because the function of preventing the shaft 13 from breaking can not be exhibited if the hardness of the soft resin is low.
  • FIG. 7 is a diagram showing a first modification of the electric toothbrush 1 of the second embodiment.
  • the hole 50a of the soft member 50 has a diameter that allows the shaft 13 and the electric wires 21A and 22A to pass through (penetrate) without contact.
  • the flexible member 50 has an annular shape surrounding the shaft 13 and the electric wirings 21A and 22A and along the outer edges of the base portion 40 and the main body portion 10 .
  • the flexible member 50 is in contact with both the main body portion 10 and the base portion 40 in an annular shape centered on the shaft 13 .
  • the soft member 50 is in local contact along the outer edges of the pedestal 40 and the main body 10, so that the infiltration of liquid can be effectively suppressed.
  • the flexible member 50 does not bind the electrical wirings 21A and 22A, so that the load on the electrical wirings 21A and 22A can be reduced and disconnection of the electrical wirings 21A and 22A can be suppressed.
  • the flexible member 50 extends linearly in the radial direction centered on the outer long axis direction to the outside of the hole 50a in addition to the annular shape centered on the long axis direction. It may be a configuration in which a plurality of (for example, four in a + shape) are provided with a space between them. When adopting this configuration, the flexible member 50 is provided so as to protrude from the base portion 40 to the rear end side, or to protrude from the main body portion 10 to the front end side. Further, in order to prevent liquid from entering the main body 10, the shaft 13 may be liquid-tightly fitted into the hole 50a.
  • FIG. 8 is a diagram showing a second modification of the electric toothbrush 1 of the second embodiment, and is an enlarged view in which the replacement part 30 and the base part 40 are disassembled.
  • the first electrode 52 is provided on the side surface forming the inner wall of the fitting recess 43 of the pedestal 40.
  • a first electrode 62 is provided on the side facing the . That is, both the first electrode 52 and the first electrode 62 are collectively provided in the fitting recess 43 .
  • a second electrode 34 is provided on the side surface of the fitting protrusion 37 in the replacement part 30 at a position opposed to the first electrode 52 in the longitudinal direction.
  • a second electrode 35 is provided on a side surface of the fitting protrusion 37 at a position opposed to the first electrode 62 in the longitudinal direction. That is, both the second electrode 34 and the second electrode 35 are collectively provided on the fitting convex portion 37 .
  • the first electrode 52 and the first electrode 62 may be provided in one fitting concave portion 43, and the second electrode 34 and the second electrode 35 may be provided in one fitting convex portion 37.
  • the manufacturing efficiency when providing the first electrode 52 and the first electrode 62 and the manufacturing efficiency when providing the second electrode 34 and the second electrode 35 are improved.
  • FIG. 9 is a diagram showing a schematic configuration of the electric toothbrush 1 according to the third embodiment.
  • the same reference numerals are assigned to the same elements as those of the first embodiment shown in FIGS. 1 and 2, and the description thereof will be omitted.
  • the pedestal portion 40 of this embodiment is provided in the replacement portion 30 . That is, the replacement part 30 of this embodiment includes the base part 40 and the flexible member 50 . As shown in FIG. 9 , the pedestal portion 40 is arranged on the rear end side in the long axis direction of the replacement portion 30 so as to be spaced apart from the replacement portion 30 .
  • FIG. 10 is an enlarged view in which the replacement portion 30 and the main body portion 10 are disassembled according to the third embodiment.
  • the base portion 40 has a through hole 41a, fitting protrusions 44 and 45, and first electrodes 46 and 47.
  • the through hole 41a is coaxial with the shaft 13 and penetrates in the longitudinal direction.
  • the through hole 41 a is formed with a diameter larger than that of the shaft 13 .
  • the shaft 13 is inserted through the through hole 41a in a non-contact manner. That is, the shaft 13 has a non-contact portion that does not contact the pedestal portion 40 . Therefore, the vibration of the shaft 13 is not synchronized with the vibration of the base portion 40 .
  • the fitting convex portion 44 extends to the rear end side in the longitudinal direction.
  • the first electrode 46 is provided on the end face on the rear end side of the outer surface of the fitting projection 44 .
  • the first electrode 46 is connected to the electrical wiring 38A.
  • the electric wiring 38A is part of the first wiring 38, is pulled out from the replacement portion 30 to the rear end side, and is inserted through the flexible member 50. As shown in FIG.
  • the electrical wiring 38A has flexibility.
  • the electric wiring 38A of the present embodiment is a wire material in which a conducting wire is covered with an insulating material. Accordingly, the functional portion 32 is electrically connected to the first electrode 46 via the first wiring 38 and the electric wiring 38A.
  • the fitting projection 45 extends to the rear end side in the longitudinal direction.
  • the first electrode 47 is provided on the end face on the rear end side of the outer surface of the fitting projection 45 .
  • the first electrode 47 is connected to the electrical wiring 39A.
  • the electric wiring 39A is part of the second wiring 39, is pulled out from the replacement portion 30 toward the rear end side, and is inserted through the flexible member 50. As shown in FIG.
  • the electrical wiring 39A has flexibility.
  • the electric wiring 39A of the present embodiment is a wire material in which a conducting wire is covered with an insulating material. Therefore, the functional portion 32 is electrically connected to the first electrode 47 via the second wiring 39 and the electric wiring 39A.
  • the flexible member 50 is provided between the replacement portion 30 and the base portion 40 .
  • the hole portion 50a of the flexible member 50 of this embodiment has a diameter that allows the shaft 13 and the electric wires 38A and 39A to be inserted (penetrated) in a non-contact manner. That is, the flexible member 50 has an annular shape surrounding the shaft 13 and the electrical wirings 38A and 39A and along the outer edges of the replacement portion 30 and the base portion 40 .
  • the flexible member 50 is in contact with both the replacement portion 30 and the base portion 40 in an annular shape centered on the shaft 13 .
  • the flexible member 50 is locally in contact with the replacement portion 30 and the pedestal portion 40 along the outer edge portions, so that the infiltration of liquid can be effectively suppressed.
  • the flexible member 50 does not constrain the electrical wirings 38A and 39A, so that the load on the electrical wirings 38A and 39A can be reduced and disconnection of the electrical wirings 38A and 39A can be suppressed.
  • the replacement part 30 has a fitting hole 30b.
  • the fitting hole 30b is a cavity coaxial with the shaft 13 and extending in the longitudinal direction and opening at the rear end side.
  • the cross-sectional shape of the fitting hole 30b perpendicular to the major axis direction is a circular D partly notched with a string, which is closely fitted to the outer peripheral surface of the tip of the shaft 13 detachably over the entire circumference. It is glyph-shaped. Therefore, by tightly fitting the tip end of the shaft 13 into the fitting hole 30 b of the replacement portion 30 , the shaft 13 and the replacement portion 30 are positioned relative to each other in the rotation direction of the shaft 13 . As a result, the shaft 13 and the replacement portion 30 vibrate integrally in the rotational direction. That is, the vibration of the shaft 13 is synchronized with that of the replacement part 30 .
  • the body portion 10 has fitting recesses 16 and 17 and second electrodes 18 and 19 .
  • the fitting recess 16 is open on the front end side in the longitudinal direction and is recessed on the rear end side.
  • the fitting concave portion 16 is arranged at a position facing the fitting convex portion 44 in the longitudinal direction.
  • the fitting concave portion 16 can be fitted with the fitting convex portion 44 .
  • a second electrode 18 is provided on the bottom wall of the inner walls of the fitting recess 16 .
  • the second electrode 18 is electrically connected to the positive electrode of the power supply 14 via the first conductive portion 21 .
  • the fitting recess 17 is open on the front end side in the longitudinal direction and recessed on the rear end side.
  • the fitting concave portion 17 is arranged at a position opposed to the fitting convex portion 45 in the longitudinal direction.
  • the fitting concave portion 17 can be fitted with the fitting convex portion 45 .
  • a second electrode 19 is provided on the bottom wall of the inner wall of the fitting recess 17 .
  • the second electrode 19 is electrically connected to the negative electrode of the power supply 14 via the second conductive portion 22 .
  • the distal end portion of the shaft 13 of the main body portion 10 is inserted through the through hole 41a of the base portion 40 and the hole portion 50a of the flexible member 50, and the fitting hole 30b of the replacement portion 30 is inserted.
  • the fitting projections 44 and 45 of the base portion 40 are fitted into the fitting recesses 16 and 17 of the main body portion 10, respectively.
  • the replacement part 30 is connected to the main body part 10 .
  • the first electrodes 46 and 47 are connected to the second electrodes 18 and 19, respectively.
  • the functional portion 32 is electrically connected to the positive electrode of the power supply 14 via the first wiring 38, the electric wiring 38A, the first electrode 46, the second electrode 18 and the first conductive portion 21. Also, the functional portion 32 is electrically connected to the negative electrode of the power source 14 via the second wiring 39 , the electric wiring 39 ⁇ /b>A, the first electrode 47 , the second electrode 19 and the second conductive portion 22 .
  • the shaft 13 and the replacement part 30 integrally vibrate in synchronization with each other in the rotation direction.
  • the function part 32 expresses the effect
  • the electrical wirings 38A and 39A vibrate in the rotational direction together with the replacement portion 30.
  • the flexible electrical wirings 38A and 39A bend, which interferes with current flow. don't come In addition, it is possible to suppress the vibration of the changing part 30 in the rotational direction from becoming a large resistance.
  • the replacement section 30 can sufficiently vibrate. The effect of becoming is obtained.
  • the flexible member 50 is not an essential component, but a configuration in which a gap is provided between the replacement portion 30 and the base portion 40 as in the first embodiment shown in FIG. good too.
  • the present invention can be applied to electric toothbrushes.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Brushes (AREA)
PCT/JP2022/019666 2021-06-30 2022-05-09 電動歯ブラシ WO2023276447A1 (ja)

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JP2021-108778 2021-06-30

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CN (1) CN115531021A (enrdf_load_stackoverflow)
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5636229U (enrdf_load_stackoverflow) * 1979-08-28 1981-04-07
JPH07148020A (ja) * 1993-06-08 1995-06-13 Shiken:Kk 電動歯ブラシのブラシヘッドの取付治具とブラシヘッド
JP2007504904A (ja) * 2003-09-09 2007-03-08 ザ プロクター アンド ギャンブル カンパニー 切断可能な電気的接続を有する歯ブラシ
JP2007515219A (ja) * 2003-12-22 2007-06-14 グラクソスミスクライン・コンシューマー・ヘルスケア・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング・ウント・コムパニー・コマンディットゲゼルシャフト 歯ブラシ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5636229U (enrdf_load_stackoverflow) * 1979-08-28 1981-04-07
JPH07148020A (ja) * 1993-06-08 1995-06-13 Shiken:Kk 電動歯ブラシのブラシヘッドの取付治具とブラシヘッド
JP2007504904A (ja) * 2003-09-09 2007-03-08 ザ プロクター アンド ギャンブル カンパニー 切断可能な電気的接続を有する歯ブラシ
JP2007515219A (ja) * 2003-12-22 2007-06-14 グラクソスミスクライン・コンシューマー・ヘルスケア・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング・ウント・コムパニー・コマンディットゲゼルシャフト 歯ブラシ

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JPWO2023276447A1 (enrdf_load_stackoverflow) 2023-01-05

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