JP5927551B2 - Oral hygiene equipment - Google Patents

Description

  The present invention relates to an oral hygiene device including a functional component that acts on the oral cavity, an electric motor that operates the functional component, a main body case that holds the electric motor, and a gripping case that covers an outer surface of the main body case.

  Patent Document 1 discloses an electric toothbrush as an example of an oral hygiene device. This electric toothbrush has a main body case, a gripping case, a toothbrush component, a cap, and an electric motor. The electric motor imparts vibration to the toothbrush.

Japanese Patent Application No. 2009-294635

  Since the electric toothbrush is formed for portable use, it is preferable to reduce the size. However, Patent Document 1 does not specifically consider the miniaturization of the electric toothbrush. In addition, although the subject of the electric toothbrush was mentioned here, other oral hygiene apparatuses have the same subject.

  The objective of this invention is providing the oral-hygiene apparatus which has a structure which can contribute to size reduction.

  One form of the oral hygiene device according to the present invention is an electric motor that is driven by electric power supplied from a power source, a power source can be attached, a main body case that holds the electric motor, and the main body case. A functional component driven by an electric motor; a gripping case that covers an outer surface of the main body case; a first fitting that is provided on the main body case and is electrically connectable to the first electrode of the power source; A second metal fitting provided between the bottom of the gripping case and the lower part of the main body case and electrically connectable to the second electrode of the power source; provided in the main body case; The conductive member, the main body case, and the gripping case are relatively rotated to relatively rotate the conductive member and the second metal fitting, and the conductive member Serial including and the OFF state of the power supply second bracket and is not electrically connected, and the conductive member and the second metal fitting and the electrical connection can switch the on-state of the power supply to a relative movement structure.

  The oral hygiene device can contribute to miniaturization.

FIG. 2 is a perspective view of the oral hygiene device of the first embodiment. FIG. 2 is a perspective view in which some elements are omitted or broken from the state of FIG. 1. FIG. 3 is a perspective view in which some elements are omitted or broken from the state of FIG. 2. FIG. 4 is a perspective view in which some elements are omitted or broken from the state of FIG. 3. These are the figures regarding the oral-hygiene apparatus of FIG. FIG. 3 is a diagram related to the electric toothbrush of FIG. 2. FIG. 2 is an exploded perspective view of the oral hygiene device of FIG. 1. FIG. 2 is a schematic view of the oral hygiene device of FIG. 1. FIG. 6 is a cross-sectional view of the oral hygiene device of FIG. 5. FIG. These are figures regarding the gripping case. These are figures regarding a toothbrush attachment. These are figures regarding the outer case. FIG. 3 is a perspective view of an outer case. These are figures regarding the inner case. FIG. 4 is a perspective view of an inner case. FIG. 10 is a cross-sectional view in which some elements are omitted from the state of FIG. 9. These are figures regarding a toothbrush attachment and the like. These are figures regarding a toothbrush attachment and the like. FIG. 3 is a cross-sectional view of a toothbrush attachment and an upper coupling portion. FIG. 21 is a cross-sectional view of the electric toothbrush of FIG. 20. These are figures regarding a toothbrush main body. These are figures regarding a toothbrush main body. FIG. 24 is a cross-sectional view of the toothbrush body of FIGS. 22 and 23. FIG. 24 is a cross-sectional view of the toothbrush body of FIGS. 22 and 23. FIG. 24 is a cross-sectional view of the toothbrush body of FIGS. 22 and 23. These are the figures regarding the anode metal fittings of an electric toothbrush. These are figures regarding the gripping case. FIG. 29 is a perspective view of the gripping case of FIG. 28. These are figures regarding the gripping case. These are the perspective views of the oral-hygiene apparatus of 2nd Embodiment.

  (An example of the form that the oral hygiene device can take)
  [1] An embodiment of the oral hygiene apparatus according to the present invention is provided with an electric motor driven by electric power supplied from a power source, a main body case to which the power source can be attached and holding the electric motor, and the main body case. A functional component driven by the electric motor; a gripping case that covers an outer surface of the main body case; a first fitting that is provided on the main body case and is electrically connectable to the first electrode of the power source; In the gripping case, provided between the bottom of the gripping case and the lower part of the main body case, and provided in the main body case, a second metal fitting electrically connectable to the second electrode of the power source, By rotating the conductive member electrically connected to the metal fitting, the main body case and the gripping case relatively, the conductive member and the second metal fitting are rotated relatively, and the conductive A relative operation structure capable of switching between an off state of the power source where the material and the second metal fitting are not electrically connected and an on state of the power source where the conductive member and the second metal fitting are electrically connected. Including.
  [2] According to an example of the oral hygiene device, the second metal fitting is connected to the first contact portion that can be in contact with the second electrode of the power source, and the first contact portion. A second contact portion that is displaceable, and the relative operation structure relatively positions the lower case body and the second contact portion by rotating the main body case and the gripping case relative to each other. The lower portion of the main body case pushes down the second contact portion, whereby the second contact portion is separated from the conductive member to form an off state of the power source, and the lower portion of the main body case is connected to the second contact portion. By separating from the portion, the second contact portion comes into contact with the conductive member, and the power-on state is formed.
  [3] According to one example of the oral hygiene device, the first contact portion is disposed at the center of the bottom of the gripping case, and the shape of the second contact portion is curved so as to follow the inner peripheral surface of the gripping case. Shape.
  [4] According to an example of the oral hygiene device, the relative motion structure includes a first rotation structure and a second rotation structure, and the first rotation structure switches the power source between an OFF state and an ON state, The rotating structure switches between a coupled state and a separated state of the main body case and the gripping case.
  [5] According to an example of the oral hygiene device, the first rotation structure causes the main body case and the gripping case to be switched from the off state to the on state, and the second rotation. Depending on the structure, the relative rotation directions of the main body case and the gripping case for switching the main body case and the gripping case from the coupled state to the separated state are different.
  [6] According to an example of the oral hygiene device, the relative motion structure is configured such that the body case and the gripping case are moved from a relative rotational position of the body case and the gripping case where the power-off state is formed. The power source is switched from the off state to the on state by rotating relatively in the first rotation direction, and the main body case from the relative rotation position of the main body case and the gripping case where the power off state is formed. The main body case and the gripping case are switched from the coupled state to the separated state by the relative rotation of the gripping case in the second rotational direction opposite to the first rotational direction.
  [7] According to an example of the oral hygiene device, the operation force for switching the power source between the off state and the on state in the first rotating structure is a combination of the main body case and the gripping case in the second rotating structure. It is smaller than the operating force for switching between the state and the separation state.
  [8] According to an example of the oral hygiene device, an operation amount for switching the power-off state and the on-state in the first rotating structure is a combination of the main body case and the gripping case in the second rotating structure. The operation amount for switching between the state and the separation state is smaller.
  [9] According to an example of the oral hygiene device, the main body case includes an upper coupling portion, a battery holding portion, and a device holding portion, and the upper coupling portion projects outward from an upper portion of the gripping case, A part for holding a functional component, wherein the battery holding part is provided on a bottom side of the gripping case with respect to the upper coupling part, constitutes a lower part of the main body case, and can be attached with a battery as the power source The device holding portion is a portion that is provided in the upper coupling portion and holds the electric motor.
  [10] According to one example of the oral hygiene device, the battery holding portion includes a groove provided on an outer periphery, and the conductive member is fitted into the groove.
  [11] According to an example of the oral hygiene device, the first metal fitting and the first terminal of the electric motor are electrically connected, and the conductive member and the second terminal of the electric motor are electrically connected. The main body case further includes a board holding part that is provided between the upper coupling part and the battery holding part and holds the circuit board.
  [12] According to an example of the oral hygiene device, the main body case includes an outer case and an inner case, the outer case includes the upper coupling portion, and the inner case includes the battery holding portion and the device holding portion. In addition, the outer case and the inner case are coupled to each other and can rotate integrally with the gripping case.
  [13] According to an example of the oral hygiene device, the outer case includes a lower coupling portion in addition to the upper coupling portion, and the lower coupling portion is provided in the gripping case, It is a part which couple | bonds with the said holding | grip case in the state which can rotate.
  [14] According to an example of the oral hygiene device, the oral hygiene device is an electric toothbrush that can be coupled to and separated from the main body case or the gripping case, and is coupled to the main body case or the gripping case. And a cap for covering the functional component.

(First embodiment)
Terms relating to the portable oral hygiene device 1 are defined as follows.
(A) The Z direction indicates the longitudinal direction of the device 1.
(B) The Y direction indicates a direction orthogonal to the Z direction in the front view of the device 1.
(C) The X direction indicates a direction orthogonal to the Z direction in a side view of the device 1.
(D) The X axis represents a coordinate axis that defines the X direction.
(E) The Y axis indicates a coordinate axis that defines the Y direction.
(F) The Z axis indicates a coordinate axis that defines the Z direction.
(G) The XY plane indicates a plane defined by the X axis and the Y axis.
(H) The XZ plane indicates a plane defined by the X axis and the Z axis.
(I) The YZ plane is a plane defined by the Y axis and the Z axis.
(J) The front direction XA indicates a direction from the back side to the front side in the X direction.
(K) The rear direction XB indicates a direction from the front side toward the back side in the X direction.
(L) The right direction YA indicates a direction from the left side to the right side in the Y direction in a front view.
(M) The left direction YB indicates a direction from the right side to the left side in the Y direction when viewed from the front.
(N) The upward direction ZA indicates a direction from the bottom of the device 1 toward the tip in the Z direction.
(O) The downward direction ZB indicates a direction from the tip of the device 1 toward the bottom in the Z direction.
(P) The radial direction indicates the radial direction about the Z axis on the XY plane.
(Q) The outward direction indicates a direction away from the Z axis in the radial direction.
(R) The inward direction indicates a direction approaching the Z axis in the radial direction.
The radial direction is a virtual circle when a circle formed by fixing the central axis and moving another point is defined as a virtual circle for a line segment connecting the two points of the central axis and another point. This corresponds to the direction of the radius vector which is the radius of.

  FIG. 1A shows an external perspective structure of the portable oral hygiene device 1. The portable oral hygiene device 1 includes an electric toothbrush 2 that cleans teeth and a cap 80 that protects the toothbrush attachment 50 of the electric toothbrush 2. The cap 80 includes an outer peripheral wall portion 81 that covers the periphery of the toothbrush attachment 50, and an upper side wall portion 82 that closes an opening portion on the upper side of the outer peripheral wall portion 81. The upper side wall portion 82 has two vent holes 82A having an arc shape. The portable oral hygiene device 1 corresponds to an “oral hygiene device”. The toothbrush attachment 50 corresponds to a “functional component”.

  FIG.1 (b) shows the portable oral hygiene apparatus 1 which cut | disconnected the cap 80 in XZ plane in Fig.1 (a). The electric toothbrush 2 includes a toothbrush main body 10 incorporating various components and a toothbrush attachment 50 in which a plurality of bristle bundles 51 are planted.

  Fig.2 (a) shows the portable oral hygiene apparatus 1, ie, the electric toothbrush 2, in which the cap 80 is omitted in FIG. The toothbrush main body 10 includes a main body case 11 coupled to the toothbrush attachment 50, a gripping case 70 gripped by the user, and a decorative ring 12 that enhances the beauty of the electric toothbrush 2.

The decorative ring 12 has a plurality of decorative portions 12A. One decorative portion 12A has a quadrangular pyramid shape. Each decorative portion 12 </ b> A is formed at equal intervals in the circumferential direction of the decorative ring 12. The outer surface of the decorative ring 12 (hereinafter referred to as “decorative surface 12Z”) has a shape that makes contact with the mounting surface , which is the surface of the object on which the portable oral hygiene device 1 is mounted , at two or more points. The decorative surface 12Z is painted with a deposition paint. The deposited paint forms a film having a metallic luster.

  FIG.2 (b) shows the electric toothbrush 2 which fractured | ruptured the toothbrush attachment 50 in XZ plane in Fig.2 (a). A part of the main body case 11 is located in a space in the toothbrush attachment 50.

  Fig.3 (a) shows the electric toothbrush 2 which fractured | ruptured the holding | grip case 70 in XZ plane in FIG.2 (b). The main body case 11 has an outer case 20 having a portion exposed to the outside, and an inner case 30 covered with the gripping case 70 and the outer case 20. The gripping case 70 is affixed to the outer peripheral wall 71 that covers the periphery of the outer case 20 and the inner case 30, the lower side wall 72 that closes the lower opening of the outer peripheral wall 71, and the outer surface of the lower side wall 72. Waterproof sheet (not shown).

  FIG. 5D shows a planar structure of the lower wall portion 72. The lower wall portion 72 includes an intermediate recess 72A that is recessed from the outer surface side of the gripping case 70 to the inner space side, four grooves 72B that connect the intermediate recess 72A and the outer peripheral wall portion 71, and a space inside the gripping case 70. And a vent hole 72C that communicates the external space with each other. The intermediate recess 72A, the four grooves 72B, and the vent hole 72C are covered with the waterproof sheet.

  FIG.3 (b) shows the electric toothbrush 2 which fractured | ruptured the outer case 20 and the decoration ring 12 in XZ plane in Fig.3 (a). A part of the inner case 30 is located in a space in the outer case 20. The outer case 20 includes an elastic member 25 that seals a gap between the main body case 11 and the gripping case 70.

  Fig.4 (a) shows the electric toothbrush 2 which fractured | ruptured the inner case 30 in XZ plane in FIG.3 (b). The inner case 30 includes a vibration generator 40 that vibrates the toothbrush attachment 50 and a battery holding portion 31 that holds the dry battery 3. The vibration generator 40 includes an electric motor 41, an eccentric weight 43, and a spacer 44.

  FIG.4 (b) shows the electric toothbrush 2 which abbreviate | omitted the dry cell 3 from Fig.4 (a). The gripping case 70 has an anode fitting 64 that contacts the anode of the dry battery 3. The inner case 30 includes a current-carrying metal fitting 67 connected to the anode metal fitting 64, a cathode metal fitting 63 that contacts the cathode of the dry battery 3, and a circuit board 61 that connects the current-carrying metal fitting 67, the cathode metal fitting 63, and the electric motor 41 to each other. Have. The anode fitting 64 corresponds to a “gripping side electrode”. The energizing metal fitting 67 corresponds to a “conductive member”.

  A material harder than the material of the brush stay 53 of the toothbrush attachment 50 is used as the material of the main body case 11. As a combination of the material of the main body case 11 and the brush stay 53, the following are mentioned, for example. A glass fiber-containing ABS resin is used as the material of the main body case 11, and a polyacetal resin is used as the material of the brush stay 53. Alternatively, ABS resin is used as the material of the main body case 11, and polypropylene resin is used as the material of the brush stay 53. In short, if the main body case 11 is a combination of materials having a high hardness with respect to the brush stay 53 within a range having the hardness necessary for maintaining the functions of the main body case 11 and the brush stay 53, Other combinations can be selected without being limited to the combinations exemplified above.

  In addition, the outer case 20 of the main body case 11 uses a material harder than the brush stay 53 as described above in order to maintain a necessary function even when the toothbrush attachment 50 is repeatedly coupled and separated a predetermined number of times. Is preferred. On the other hand, for the inner case 30 of the main body case 11, even if a material softer than the brush stay 53 is used, there is no concern about a decrease in durability due to the connection and separation of the main body case 11 and the toothbrush attachment 50. A material different from that of the case 20 can also be selected.

  With reference to FIG. 5, the structure regarding the external appearance of the portable oral hygiene apparatus 1 is demonstrated. FIG. 5A shows the left side structure of the portable oral hygiene device 1. FIG. 5B shows the front structure of the portable oral hygiene device 1. FIG. 5C shows a planar structure of the portable oral hygiene device 1. FIG. 5D shows the bottom structure of the portable oral hygiene device 1.

  The outer surface 1Z of the portable oral hygiene device 1 has an outer surface of the cap 80 (hereinafter referred to as “cap outer surface 80Z”), a decorative surface 12Z, and an outer surface of the gripping case 70 (hereinafter referred to as “gripping outer surface 70Z”). The cap outer surface 80Z and the gripping outer surface 70Z have a smoothly curved shape.

As shown in FIG. 5C, the decorative surface 12Z is located outward from the cap outer surface 80Z over the entire periphery of the cap outer surface 80Z. As shown in FIG. 5D , the decorative surface 12Z is positioned outward from the gripping outer surface 70Z over the entire periphery of the gripping outer surface 70Z.

  As shown in FIG. 5A, portions of the decorative portion 12A corresponding to the front surface and the back surface of the cap outer surface 80Z and the gripping outer surface 70Z are predetermined as outward projecting amounts with respect to the cap outer surface 80Z and the gripping outer surface 70Z. It has a protruding amount LA. The predetermined protrusion amount LA corresponds to the distance between the most outwardly protruding portion of the decorative portion 12A and the cap outer surface 80Z and the gripping outer surface 70Z.

  As shown in FIG. 5B, portions of the decorative portion 12A corresponding to the right side surface and the left side surface of the cap outer surface 80Z and the gripping outer surface 70Z protrude outwardly with respect to the cap outer surface 80Z and the gripping outer surface 70Z. As a predetermined protrusion amount LB. The predetermined protrusion amount LB is larger than the predetermined protrusion amount LA. The predetermined protrusion amount LB corresponds to the distance between the most outwardly protruding portion of the decorative portion 12A and the cap outer surface 80Z and the gripping outer surface 70Z.

  With reference to FIG. 6, the structure regarding the external appearance of the electric toothbrush 2 is demonstrated. FIG. 6A shows the left side structure of the electric toothbrush 2. FIG. 6B shows the front structure of the electric toothbrush 2. FIG. 6C shows the planar structure of the electric toothbrush 2. FIG. 6D shows the bottom structure of the electric toothbrush 2.

  The outer surface 2Z of the electric toothbrush 2 includes an outer surface of the toothbrush attachment 50 (hereinafter referred to as “toothbrush surface 50Z”), an outer surface of the outer case 20 (hereinafter referred to as “outer outer surface 20Z”), a decorative surface 12Z, and a gripping outer surface 70Z. Have.

  The decorative surface 12Z is located outward from the toothbrush surface 50Z and the outer outer surface 20Z over the entire periphery of the toothbrush surface 50Z and the outer outer surface 20Z, as shown in FIG. 6 (c).

  As shown in FIG. 6A, portions of the decorative portion 12A corresponding to the front surface and the back surface of the outer outer surface 20Z have a predetermined protrusion amount LC as an outward protrusion amount with respect to the outer outer surface 20Z. The predetermined protruding amount LC corresponds to the distance between the outermost protruding portion 12A and the outermost surface 20Z.

  As shown in FIG. 6B, portions of the decorative portion 12A corresponding to the right side surface and the left side surface of the outer outer surface 20Z have a predetermined protrusion amount LD as an outward protrusion amount with respect to the outer outer surface 20Z. The predetermined protrusion amount LD is larger than the predetermined protrusion amount LC. The predetermined protrusion amount LD corresponds to the distance between the outermost surface 20Z and the outermost protruding portion of the decorative portion 12A.

With reference to FIG. 7 and FIG. 8, the connection structure of each component is demonstrated.
FIG. 7 shows a perspective structure of the portable oral hygiene device 1 separated so as to be separable with the use of the user. The user can separate the portable oral hygiene device 1 into the electric toothbrush 2 and the cap 80. Moreover, the electric toothbrush 2 can be separated into the toothbrush main body 10 and the toothbrush attachment 50. Further, the toothbrush main body 10 can be separated into the main body case 11 and the gripping case 70.

  The main body case 11 has an outer case 20 and an inner case 30. The inner case 30 has a battery holding portion 31 for housing the dry battery 3. The battery holding part 31 has an opening part 31 </ b> A for inserting the dry battery 3 into the space in the battery holding part 31 and for taking out the dry battery 3 from the space in the battery holding part 31.

FIG. 8 shows a schematic connection structure of each component.
The portable oral hygiene device 1 has the following four coupling structures.
(A) The electric toothbrush 2 and the cap 80 have a cap coupling structure R that can be coupled and separated from each other. The cap coupling structure R includes two outer-side fitting portions RA formed on the outer outer surface 20Z and two cap-side fitting portions RB formed on the inner surface of the cap 80 (hereinafter, “cap inner surface 80W”). (See FIG. 18 for each) .

(B) The toothbrush main body 10 and the toothbrush attachment 50 have a toothbrush coupling structure S that can be coupled and separated from each other. The toothbrush coupling structure S has one outer side fitting portion SA formed on the outer outer surface 20Z and a toothbrush side fitting portion SB formed on the back wall portion of the toothbrush attachment 50 (see FIG. 19 respectively) . The toothbrush coupling structure S corresponds to a “part coupling structure”.

(C) The outer case 20 and the inner case 30 have a main body coupling structure T that can be coupled and separated from each other. The main body coupling structure T has two inner side fitting portions TA formed on the inner outer surface 30Z and two outer side fitting portions TB formed on the outer outer surface 20Z (see FIG. 22 respectively) .

(D) The main body case 11 and the gripping case 70 have a gripping and coupling structure U that can be coupled and separated from each other. The grip coupling structure U includes an upper grip coupling structure UX (see FIG. 24A) that restricts or allows relative rotation of the outer case 20 and the grip case 70, and relative rotation of the inner case 30 and the grip case 70. And a lower grip coupling structure UY (see FIG. 24B) . The upper grip coupling structure UX and the lower grip coupling structure UY cooperate or separate the main body case 11 and the grip case 70. Note that the gripping and coupling structure U corresponds to a “relative motion structure”. Further, the upper holding coupling structure UX corresponds to a “second rotating structure”. Further, the lower grip coupling structure UY corresponds to a “first rotation structure”.

The upper grip coupling structure UX includes two grip-side fitting portions UA formed on the inner surface of the gripping case 70 (hereinafter referred to as “gripping inner surface 70W”) and two outer-side fitting portions UB formed on the outer outer surface 20Z. (See FIG. 24A) .

The lower grip coupling structure UY includes two grip side fitting portions UC formed on the grip inner surface 70W and one inner side fit portion formed on the outer surface of the inner case 30 (hereinafter, “inner outer surface 30Z”). UD (see FIG . 24B) .

In addition, the coupling | bonding by each coupling structure R, S, T, U in the portable oral hygiene apparatus 1 is when force does not act with respect to two components mutually couple | bonded by each coupling structure, or two components are combined. When the force acting in the direction of separating from each other is smaller than a predetermined force, it shows a state in which these two parts are restricted from relatively operating.

  Fig.9 (a) shows the cross-section of the D5A-D5A plane of FIG. FIG. 9B is a cross-sectional view showing a cross-sectional structure of the D5B-D5B plane of FIG. FIG. 9 shows the appearance of each component located in the main body case 11.

  The upper coupling part 21 is entirely located in the toothbrush attachment 50. The electric motor 41 is entirely located in the upper coupling portion 21. The outer surface of the intermediate coupling portion 22 faces the cap inner surface 80W. The upper part of the inner case 30 is located in the outer case 20. The lower part of the inner case 30 is located in the gripping case 70.

  The configuration of the cap 80 will be described with reference to FIG. FIG. 10A shows the front structure of the cap 80. FIG. 10B shows a cross-sectional structure of the cap 80 viewed from the right direction YA in the D10A-D10A plane of FIG. FIG. 10C shows a cross-sectional structure of the cap 80 viewed in the left direction YB in the D10A-D10A plane of FIG. FIG. 10D shows a cross-sectional structure of the cap 80 as viewed in the downward direction ZB in the D10B-D10B plane of FIGS. 10A to 10C. FIG. 10D shows a cross-sectional structure of the cap 80 as viewed in the downward direction ZB in the D10C-D10C plane of FIGS. 10A to 10C. FIG. 10E shows a cross-sectional structure of the cap 80 viewed in the downward direction ZB in the D10D-D10D plane of FIGS. 10A to 10C. In FIG. 10, each coordinate axis is omitted. The coordinates in the description relating to FIG. 10 are the same as those shown in FIGS.

  The cap 80 includes two contact portions 83 that guide the toothbrush attachment 50 and the outer case 20, and two cap-side fitting portions RB that constitute the cap coupling structure R. Each contact portion 83 is formed from the opening portion 84 of the cap 80 to the upper side wall portion 82. One contact portion 83 and the other contact portion 83 have a positional relationship that faces each other about the X axis. Each cap-side fitting portion RB is formed in the vicinity of the opening portion 84 of the cap 80 on the contact portion 83. Further, the contact portion 83 has a shape recessed outward with respect to the cap inner surface 80W.

  The configuration of the gripping case 70 will be described with reference to FIG. FIG. 11A shows the front structure of the gripping case 70. FIG. 11B shows a cross-sectional structure of the gripping case 70 viewed from the right direction YA in the D11A-D11A plane of FIG. FIG. 11C shows a cross-sectional structure of the gripping case 70 viewed from the rear ZB in the D11B-D11B plane of FIG. FIG.11 (d) shows the cross-section of the holding | grip case 70 of the downward direction ZB in the D11C-D11C plane of Fig.11 (a)-(c). FIG.11 (e) shows the cross-section of the holding | grip case 70 of the downward direction ZB in D11D-D11D plane of Fig.11 (a)-(c). FIG.11 (f) shows the cross-section of the holding | grip case 70 of the downward direction ZB in the D11E-D11E plane of Fig.11 (a)-(c). In FIG. 11, each coordinate axis is omitted. The coordinates in the description related to FIG. 11 are the same as those shown in FIGS.

The gripping case 70 protrudes inward from two gripping side fitting portions UA constituting the upper gripping coupling structure UX, two gripping side fitting portions UC constituting the lower gripping coupling structure UY, and a gripping inner surface 70W. Two vertical ribs 76. In addition, the gripping case 70 has a fixing portion 74 for fixing the anode fitting 64 (see FIG. 4) and an opening portion 73 for inserting the main body case 11 into the internal space.

  Each gripping side fitting portion UA is located in the vicinity of the opening portion 73 on the gripping inner surface 70W. One gripping side fitting portion UA and the other gripping side fitting portion UA are opposed to each other around the X axis.

  Each gripping-side fitting portion UC is formed from the lower wall portion 72 of the gripping case 70 to the middle portion in the Z direction. One gripping side fitting portion UC and the other gripping side fitting portion UC have a distance corresponding to the size of the inner side fitting portion UD of the inner case 30 in the circumferential direction.

Each vertical rib 76 is formed at a position corresponding to the grip-side fitting portion UA around the Z axis. Each vertical rib 76 is formed from the lower side wall portion 72 of the gripping case 70 to the vicinity of the lower portion of the gripping side fitting portion UA in the Z direction.

  With reference to FIG. 12, the structure of the toothbrush attachment 50 is demonstrated. FIG. 12A shows a front structure of the toothbrush attachment 50. FIG. 12B shows the back structure of the toothbrush attachment 50. FIG.12 (c) shows the cross-section of the toothbrush attachment 50 of the right direction YA view in D12A-D12A plane of Fig.12 (a). FIG. 12D shows a cross-sectional structure of the toothbrush attachment 50 as viewed in the downward direction ZB in the D12B-D12B plane of FIGS. 12A to 12C. FIG.12 (e) shows the cross-section of the toothbrush attachment 50 of the downward direction ZB in the D12C-D12C plane of Fig.12 (a)-(c). FIG.12 (e) shows the cross-section of the toothbrush attachment 50 of the downward ZB view in the D12D-D12D plane of Fig.12 (a)-(c). In FIG. 12, each coordinate axis is omitted. The coordinates in the description relating to FIG. 12 are the same as those shown in FIGS.

  The toothbrush attachment 50 includes a plurality of bristle bundles 51 for cleaning teeth, a brush head 52 in which each bristle bundle 51 is flocked, and a brush stay 53 coupled to the main body case 11. The brush head 52 and the brush stay 53 are formed as a single member from the same resin material.

The brush stay 53 includes a toothbrush side fitting portion SB constituting the toothbrush coupling structure S, and a guide rib 54 fitted in the guide groove 21A of the outer case 20 ( see FIG. 13C) . In addition to this, the brush stay 53 has a rotary coupling structure 55 for coupling to and separating from an outer case having a structure different from that of the outer case 20 (hereinafter, “another structural case”). The separate structure case is a separate structure fitting convex portion that is coupled to and separated from the toothbrush side fitting portion SB, and another structure that gives the user a feeling of operation when the toothbrush attachment 50 is coupled to the separate structure case by the user. An operation feeling imparting unit. In addition, illustration of another structure case is abbreviate | omitted.

  The toothbrush side fitting portion SB has a through hole formed in the back wall portion of the brush stay 53. The guide rib 54 is formed from the opening portion 59 of the toothbrush attachment 50 to the intermediate portion in the Z direction.

  The rotary coupling structure 55 includes a concave fitting portion 56 for fitting another structural operation feeling imparting section, an operation feeling imparting section 57 that imparts a reaction force to the separate structural operation feeling imparting section, and another structural operation feeling imparting section. And a rotation guide groove 58 for guiding the operation feeling imparting portion 57.

  The concave fitting portion 56 has a regulation elevation surface 56 </ b> A that comes into contact with another structural operation feeling imparting portion fitted into the concave fitting portion 56. The operation feeling imparting portion 57 includes a guide slope 57A that guides the separate structural operation feeling imparting portion to the concave fitting portion 56, and a regulation elevation surface 57B that contacts the separate structural operation feeling imparting portion fitted in the concave fitting portion 56. And an intermediate curved surface 57C that connects the guide slope 57A and the regulation elevation surface 57B. The rotation guide groove 58 has a shape for guiding another structure fitting convex portion from the opening portion 59 to the toothbrush side fitting portion SB.

  When the user joins the toothbrush attachment 50 to another structure case, the user inserts another structure fitting convex portion into the rotation guide groove 58. Next, by rotating the toothbrush attachment 50 around the Z axis with respect to the separate structure case, the separate structure fitting convex portion is fitted into the toothbrush side fitting portion SB. At this time, the separate structural operation feeling imparting portion moves from the rotation guide groove 58 to the concave fitting portion 56 via the guide slope 57A and the intermediate curved surface 57C. The separate structural operation feeling imparting section provides the user with a reaction force from the operation feeling imparting section 57 as an operational feeling when getting over the guide slope 57A and the intermediate curved surface 57C.

  The other structure fitting convex portion fitted into the toothbrush side fitting portion SB is restricted from moving with respect to the brush stay 53 by contact with the back wall portion of the brush stay 53. Thereby, the toothbrush attachment 50 is couple | bonded with another structure case.

  The user gives the toothbrush attachment 50 a separate structure case by giving the brush stay 53 the force necessary for the separate structure fitting convex portion to ride on the inner surface of the back wall portion of the brush stay 53 from the toothbrush side fitting portion SB. Can be separated from

  The configuration of the outer case 20 will be described with reference to FIG. FIG. 13A shows the left side structure of the outer case 20. FIG. 13B shows a right side structure of the outer case 20. FIG. 13C shows the front structure of the outer case 20. FIG. 13D shows the back structure of the outer case 20.

  The outer case 20 includes an upper coupling portion 21 coupled to the toothbrush attachment 50, a lower coupling portion 23 coupled to the gripping case 70, and an intermediate coupling portion 22 connecting the upper coupling portion 21 and the lower coupling portion 23 to each other. The upper coupling portion 21, the intermediate coupling portion 22, and the lower coupling portion 23 are formed as a single member from the same resin material.

  The upper coupling portion 21 has one outer side fitting portion SA that constitutes the toothbrush coupling structure S, and a guide groove 21A that guides the guide rib 54 of the toothbrush attachment 50 toward the facing surface 22C of the intermediate coupling portion 22.

The intermediate coupling portion 22 includes two outer-side fitting portions RA constituting the cap coupling structure R, and two fixing portions 22A into which the concave portions of the decorative ring 12 are fitted. In addition to this, the intermediate coupling portion 22 has a fitting groove 22B into which the elastic member 25 is fitted, and a facing surface 22C facing the end surface of the toothbrush attachment 50 on the opening portion 59 side. Each fixed portion 22 </ b> A and each outer-side fitting portion RA has a shape protruding in the radial direction from the outer surface of the intermediate coupling portion 22.

  The lower coupling portion 23 includes two outer side fitting portions UB that form the upper gripping coupling structure UX, and two outer side fitting portions TB that form the main body coupling structure T. Each outer-side fitting portion TB has a hole that penetrates a part of the wall portion of the lower coupling portion 23.

  Each outer-side fitting portion UB has a first rotation groove UB1 for restricting the movement range of the holding-side fitting portion UA of the upper holding coupling structure UX, and a first rotation groove UB for guiding the holding-side fitting portion UA to the first rotation groove UB1. 2 rotation groove UB2, and boundary rib UB3 located in the boundary of 1st rotation groove UB1 and 2nd rotation groove UB2. The boundary rib UB3 moves when the gripping side fitting portion UA moves from the second rotation groove UB2 to the first rotation groove UB1, and when the gripping side fitting portion UA moves from the first rotation groove UB1 to the second rotation groove UB2. At this time, the gripping case 70 has a function of applying a reaction force.

  One outer side fitting portion UB and outer side fitting portion TB are located on the right side surface of the outer surface of the lower coupling portion 23. The other outer side fitting portion UB and outer side fitting portion TB are located on the left side of the outer surface of the lower coupling portion 23.

With reference to FIG. 14, the shape of the outer side fitting part SA is demonstrated.
The outer-side fitting portion SA includes two upright wall portions SA1 projecting from the outer surface of the upper coupling portion 21 toward the rear direction XB, and the outer surface of the upper coupling portion 21 between the upright wall portions SA1 in the rearward direction XB. And a projecting intermediate recess SA4. The intermediate recess SA4 forms a recess with respect to each upright wall SA1.

Each upright wall SA1 has a coupling-side contact surface SA2 that gives the user a feeling of operation when coupled to the toothbrush attachment 50, and a separation-side contact surface SA3 that gives the user a feeling of operation when separated from the toothbrush attachment 50. Have The coupling-side contact surface SA2 has a shape that stands upright in the rear direction XB with respect to the outer surface of the upper coupling portion 21. The separation-side contact surface SA3 has a shape protruding toward the rear direction XB from the lower direction ZB toward the upper direction ZA with respect to the outer surface of the upper coupling portion 21.

The configuration of the inner case 30 will be described with reference to FIG.
The inner case 30 holds a battery holding portion 31 that holds the dry battery 3 (see FIG. 7 ) , a substrate holding portion 32 that holds the circuit board 61 (see FIG. 9) , and a vibration generator 40 (see FIG. 9). And a device holding portion 33.

The battery holding portion 31 includes two inner side fitting portions TA constituting the main body coupling structure T, an opening portion 31A for inserting and removing the dry battery 3, and a sandwiching portion 31B for sandwiching the dry battery 3. In addition to this, the battery holding portion 31 includes a cutout portion 31C for exposing a part of the dry battery 3 housed in the battery holding portion 31 and a cathode fitting portion 31D for fitting the cathode fitting 63 (see FIG. 16). And an anode fitting portion 31E for fitting a current-carrying metal fitting 67 (see FIG. 16). In addition to this, the battery holding portion 31 includes a base portion 31F as a wall portion having high strength and three support portions 31G that connect the inner side fitting portion TA to the base portion 31F.

Each inner side fitting portion TA is supported by three support portions 31G with respect to the base portion 31F. Each inner side fitting portion TA protrudes outward from the inner outer surface 30Z in a portion surrounded by the three support portions 31G in the inner outer surface 30Z.

The anode insertion portion 31E is formed from one end portion to the other end portion on the outer surface of the battery holding portion 31. The anode insertion portion 31E has a plurality of protrusions for fixing the current-carrying metal fitting 67 by heat caulking.

Each clamping part 31B is inclined inward from the outer side as it goes from the connection part with the wall part of the battery holding part 31 toward the tip part. Therefore, when the battery 3 is inserted into the battery holding portion 31 and is spread outwardly from the inner direction each clamping portion 31B by the contact with the dry battery 3.

  The substrate holding part 32 includes two connection parts 32A for connecting a part of the wall part of the substrate holding part 32 and a part of the wall part of the apparatus holding part 33 to each other and a circuit board 61 (see FIG. 16). And a hook portion 32B.

The electrical component will be described with reference to FIG.
The electric motor 41 and the spacer 44 are fixed to the device holding portion 33 with an adhesive tape (not shown). The eccentric weight 43 is fixed to the output shaft 42 of the electric motor 41 (see FIG. 17) .

The electric toothbrush 2 has an electrical component group 60 including a plurality of electrical components. The electrical component group 60 includes a circuit board 61 that supplies the electric current of the dry battery 3 to the electric motor 41, a current fuse 62 attached on the circuit board 61, a cathode fitting 63 that contacts the cathode of the dry battery 3, and the dry battery 3. And an anode fitting 64 (see FIG. 4) in contact with the anode. In addition to this, the electrical component group 60 includes a current-carrying metal fitting 67 connected to the end of the circuit board 61 of the anode metal fitting 64, an end of the cathode metal fitting 63 on the circuit board 61 side, and a cathode terminal on the output side of the circuit board 61. A cathode lead wire 65 connected to each other, and an anode lead wire 66 connecting an end portion on the circuit board 61 side of the current-carrying metal fitting 67 and an anode terminal on the output side of the circuit board 61 to each other.

  The current fuse 62 is located between one of the anode lead wires 66 and the other of the anode lead wires 66. The cathode fitting 63 is fixed to the substrate holding portion 32 of the inner case 30. The end of the cathode fitting 63 on the circuit board 61 side is connected to the cathode terminal on the input side of the circuit board 61. The current-carrying metal fitting 67 is fixed to the anode fitting portion 31E of the battery holding portion 31. The cathode terminal on the output side of the circuit board 61 is connected to the cathode terminal of the electric motor 41. The anode terminal on the output side of the circuit board 61 is connected to the anode terminal of the electric motor 41.

  With reference to FIG. 17, an electrical circuit formed by electrical components will be described. FIG. 17A shows a state where the cap 80 and the toothbrush attachment 50 are omitted in FIG. 9A. FIG. 17B shows a state where the cap 80 and the toothbrush attachment 50 are omitted in FIG. 9B.

  When the dry battery 3 is inserted into the battery holding portion 31 and when the anode fitting 64 and the energization fitting 67 are in contact with each other, the electrical component group 60 includes the anode of the dry battery 3, the anode fitting 64, the circuit board 61, A closed circuit is formed in which the anode lead wire 66, the electric motor 41, the cathode lead wire 65, the circuit board 61, the cathode fitting 63, and the cathode of the dry battery 3 are electrically connected in this order.

  The current fuse 62 interrupts the closed circuit formed by the electrical component group 60 when the current flowing through the closed circuit is larger than the rated current. When the anode fitting 64 moves to a position where it does not come into contact with the energizing fitting 67 by the rotation of the gripping case 70 with respect to the main body case 11, the anode fitting 64 blocks the closed circuit formed by the electrical component group 60. On the other hand, when the gripping case 70 is rotated with respect to the main body case 11 and moved to a position where it comes into contact with the current-carrying metal fitting 67, the closed circuit formed by the electrical component group 60 is connected.

The current-carrying metal fitting 67 has a straight portion 67A fitted into the anode fitting portion 31E (see FIG. 15C) and a bent portion 67B subjected to bending processing. The current-carrying metal fitting 67 is fixed to the anode fitting portion 31E by heat caulking. The bent portion 67B is located in the opening portion of the inner case 30. The outer surface of the bent portion 67B has a curved shape. The curved outer surface of the bent portion 67 </ b> B suppresses the wear of the parts when contacting with the relative movement with the anode metal fitting 64.

The operation of the cap coupling structure R will be described with reference to FIG.
FIG. 18A shows a front structure in a state where the electric toothbrush 2 and the cap 80 are coupled to each other, and shows a front structure of a part of the portable oral hygiene device 1 in which the cap 80 is broken along the YZ plane. FIG. 18B is a back structure in a state where the electric toothbrush 2 and the cap 80 are coupled to each other, and shows a back structure of a part of the portable oral hygiene device 1 in which the cap 80 is broken along the YZ plane.

The cap coupling structure R releases the coupling between the electric toothbrush 2 and the cap 80 when a force larger than the first separation force acts in the Z direction in a state where the electric toothbrush 2 and the cap 80 are coupled to each other. In the state where the electric toothbrush 2 and the cap 80 are separated from each other and the positional relationship between the outer side fitting portion RA of the outer case 20 and the cap side fitting portion RB of the cap 80 corresponds to each other, When a force larger than the first coupling force acts on the direction, the electric toothbrush 2 and the cap 80 are coupled to each other.

The operation of the toothbrush coupling structure S will be described with reference to FIGS.
FIG. 19A shows a left side structure in a state where the toothbrush main body 10 and the toothbrush attachment 50 are coupled to each other, and shows a left side structure of a part of the portable oral hygiene device 1 in which the toothbrush attachment 50 is broken along the XZ plane. FIG. 19B is a back structure in a state where the toothbrush main body 10 and the toothbrush attachment 50 are coupled to each other, and shows a back structure of a part of the portable oral hygiene device 1 in which the toothbrush attachment 50 is broken along the XZ plane.

The toothbrush coupling structure S releases the coupling between the toothbrush body 10 and the toothbrush attachment 50 when a force larger than the second separation force acts in the Z direction in a state where the toothbrush body 10 and the toothbrush attachment 50 are coupled to each other. The toothbrush coupling structure S is in a state where the toothbrush body 10 and the toothbrush attachment 50 are separated from each other and the positional relationship between the outer side fitting portion SA of the outer case 20 and the toothbrush side fitting portion SB of the toothbrush attachment 50 corresponds to each other. When the force larger than the second coupling force acts in the Z direction, the toothbrush body 10 and the toothbrush attachment 50 are coupled to each other.

The detailed relationship of the toothbrush coupling structure S will be described with reference to FIGS.
FIG. 20 shows a process in which the toothbrush main body 10 and the toothbrush attachment 50 are coupled to each other by the toothbrush coupling structure S with respect to the toothbrush coupling structure S and its peripheral cross-sectional structure. Fig.21 (a) shows the cross-section of the main body case 11 and the toothbrush attachment 50 in the D20A-D20A plane of FIG.20 (c). FIG.21 (b) shows the cross-section of the main body case 11 and the toothbrush attachment 50 in the D20B-D20B plane of FIG.20 (d).

  As shown in FIG. 20A, the toothbrush attachment 50 inserts the distal end portion of the upper coupling portion 21 into the opening portion 59 by moving in the downward direction ZB with respect to the upper coupling portion 21. At this time, the guide rib 54 enters the guide groove 21A.

  As shown in FIG. 20B, in the toothbrush attachment 50, the end surface of the opening portion 59 comes into contact with the outer side fitting portion SA of the upper coupling portion 21 by moving in the downward direction ZB with respect to the upper coupling portion 21.

As shown in FIG. 20C, the back wall portion of the toothbrush attachment 50 comes into contact with the coupling-side contact surface SA2 (see FIG. 14) when a force larger than the second coupling force acts in the downward direction ZB . However, it moves on each upright wall part SA1 (refer FIG. 14) . At this time, each upright wall portion SA1 applies a reaction force to the back wall portion. The reaction force acting on the back wall portion gives the user an operational feeling associated with the operation of coupling the toothbrush attachment 50. As shown in FIG. 21A, when the rear wall portion moves on each upright wall portion SA1, the operation feeling imparting portion 57 moves on the intermediate recess portion SA4 (see FIG. 14) .

  As shown in FIG. 20D, the toothbrush attachment 50 has a toothbrush side fitting portion when the entire toothbrush side fitting portion SB moves to a position corresponding to the outer side fitting portion SA of the upper coupling portion 21. The SB and the outer side fitting portion SA are fitted together. For this reason, the toothbrush attachment 50 is coupled to the toothbrush body 10.

As shown in FIG. 21 (b), each of the upright wall portions SA1 of the outer side fitting portion SA is in contact with the wall surface of the toothbrush side fitting portion SB. The contact between each upright wall portion SA1 and the wall surface of the toothbrush side fitting portion SB regulates the rotation of the toothbrush attachment 50 with respect to the upper coupling portion 21. Guide ribs 54, when the outer side mating portion SA and toothbrush side fitting portion SB is fitted to each other are fitted in the guide groove 21A of the upper portion coupling portion 21.

With reference to FIG. 22, the detailed relationship of the main body coupling structure T will be described.
In the state where the outer case 20 and the inner case 30 are coupled to each other, the main body coupling structure T allows the outer case 20 and the inner case 30 to be coupled when a force larger than the third separation force acts in the Z direction of the electric toothbrush 2. To release. The body coupling structure T is larger than the third coupling force in a state where the outer case 20 and the inner case 30 are separated from each other and the positional relationship between the inner side fitting portion TA and the outer side fitting portion TB corresponds to each other. When the force acts in the Z direction of the electric toothbrush 2, the outer case 20 and the inner case 30 are coupled to each other.

The detailed relationship of the grip coupling structure U will be described with reference to FIGS.
FIG. 22A shows a left side structure of the toothbrush body 10 in a state where the gripping case 70 is broken along the XZ plane. FIG. 22B shows a right side structure of the toothbrush body 10 in a state where the gripping case 70 is broken along the XZ plane. Fig.23 (a) shows the front structure of the toothbrush main body 10 in the state which fractured | ruptured the holding | grip case 70 by the YZ plane. FIG. 23B shows the back structure of the toothbrush body 10 in a state where the gripping case 70 is broken along the YZ plane.

In the state where the main body case 11 and the gripping case 70 are coupled to each other, the gripping and coupling structure U is configured such that when a force larger than the fourth separation force acts in the reverse direction around the central axis of the electric toothbrush 2, The connection of 70 is released. In the grip coupling structure U, the main body case 11 and the grip case 70 are separated from each other, the positional relationship between the grip-side fitting portion UA and the outer-side fitting portion UB corresponds to each other, and the grip-side fitting portion UC When the positional relationship of the inner side fitting portions UD corresponds to each other, when a force larger than the fourth coupling force acts in the reverse direction around the central axis of the electric toothbrush 2, the main body case 11 and the gripping case 70 are coupled to each other. To do.

  The grip coupling structure U permits relative rotation of the main body case 11 and the grip case 70 in a state where the main body case 11 and the grip case 70 are coupled to each other. The relative rotation states of the main body case 11 and the gripping case 70 are divided into three states: “separated state”, “off state”, and “on state”.

  In the following, in a plan view of the toothbrush body 10 shown in FIG. 6C, the counterclockwise rotation direction around the Z axis is referred to as “coupling direction”, and the clockwise rotation direction around the Z axis is referred to as “separation direction”. And Note that the relative rotational position of the main body case 11 and the gripping case 70 in the off state corresponds to a “first rotational position”. Further, the relative rotational position of the main body case 11 and the gripping case 70 in the ON state corresponds to a “second rotational position”.

Details of the separation state will be described with reference to FIGS.
FIG. 24A shows a cross-sectional structure of the D22A-D22A plane of FIG. 22 in a state where the main body case 11 and the gripping case 70 are separated. FIG. 24B shows a cross-sectional structure of the D22B-D22B plane of FIG. 22 in a state where the main body case 11 and the gripping case 70 are separated.

  As shown in FIG. 24A, the gripping side fitting portion UA of the gripping case 70 has a movement range around the Z axis with respect to the outer case 20 when the operating force of the gripping case 70 is smaller than the fourth coupling force. It is regulated in the first rotation groove UB1. The first rotation groove UB1 corresponds to a range from the rotation restriction wall portion UB4 of the outer case 20 to the boundary rib UB3.

  The rotation restricting wall portion UB4 of the outer case 20 restricts the rotation of the gripping case 70 in the separating direction with respect to the outer case 20 when it is in contact with the gripping side fitting portion UA of the gripping case 70. The boundary rib UB <b> 3 of the outer case 20 restricts the rotation of the gripping case 70 in the connecting direction with respect to the outer case 20 when it is in contact with the gripping side fitting portion UA of the gripping case 70.

  As shown in FIG. 24B, the gripping side fitting portion UC of the gripping case 70 has a movement range around the Z axis with respect to the inner case 30 when the operating force of the gripping case 70 is smaller than the fourth coupling force. It is regulated by the inner side fitting portion UD of the inner case 30. When the inner side fitting portion UD of the inner case 30 is in contact with the holding side fitting portion UC of the holding case 70, the rotation of the holding case 70 in the direction of coupling to the inner case 30 is restricted.

As shown in FIG. 22, the first rotation groove UB1 opens to the outer surface side of the inner case 30 in the downward direction ZB. For this reason, when the gripping case 70 moves in the downward direction ZB with respect to the main body case 11 in a state where the gripping side fitting portion UA of the gripping case 70 is positioned in the first rotation groove UB1, the gripping side fitting portion UA Detach to the inner outer surface 30Z side. When the gripping case 70 moves in the upward direction ZA with respect to the main body case 11 in a state where the gripping side fitting portion UA is positioned on the inner outer surface 30Z side corresponding to the first rotation groove UB1 , the gripping side fitting portion UA is changed from the inner outer surface 30Z side. Enter one rotation groove UB1.

  The gripping case 70 can move in the downward direction ZB with respect to the main body case 11 when the gripping side fitting portion UA is detached from the first rotation groove UB1. For this reason, the main body case 11 can be detached from the opening 73 of the gripping case 70 in the separated state.

The transition from the separated state to the off state will be described.
In the separated state, when an operation force in the coupling direction smaller than the fourth coupling force is input to the gripping case 70, the gripping case 70 rotates in the coupling direction with respect to the main body case 11. Then, as shown in FIGS. 24 (a) and FIG. 24 (b), the grip-side fitting portion UA grip casing 70 is you come in contact at the boundary rib UB3.

  In the separated state of FIG. 24, when an operation force in the coupling direction larger than the fourth coupling force is input to the gripping case 70, the gripping side fitting portion UA of the gripping case 70 gets over the boundary rib UB3 in the coupling direction. And the holding side fitting part UC of the holding case 70 gets over the inner side fitting part UD of the inner case 30 in the coupling direction. Thereby, the relative rotation state of the main body case 11 and the gripping case 70 shifts to the off state.

  The fourth coupling force is the operating force in the coupling direction necessary for the gripping side fitting portion UA to get over the boundary rib UB3 in the coupling direction, and the gripping side fitting portion UC gets over the inner side fitting portion UD in the coupling direction. This corresponds to a combination of operating forces in the coupling direction necessary for the purpose. The fourth coupling force corresponds to “operation force PB”.

As shown in FIG. 23, in the separated state, the anode fitting 64 has a non-contact relationship with the energization fitting 67. The tip portion of the anode fitting 64 gradually approaches the energization fitting 67 as the gripping case 70 is rotated in the connecting direction with respect to the main body case 11. The anode fitting 64 has a non-contact relationship with the energizing fitting 67 even when the rotation state of the main body case 11 and the gripping case 70 shifts from the separated state to the off state.

Details of the OFF state will be described with reference to FIG.
FIG. 25A shows a cross-sectional structure of the D22A-D22A plane of FIG. 22 when the main body case 11 and the gripping case 70 are in an off state. FIG. 25B shows a cross-sectional structure of the D22B-D22B plane of FIG. 22 when the main body case 11 and the gripping case 70 are in an off state.

  As shown in FIG. 25 (b), one gripping side fitting portion UA of the gripping case 70 is rotated in the connecting direction with respect to the outer case 20 when the operating force of the gripping case 70 is smaller than the ON operating force. It is regulated by the inner side fitting portion UD of the inner case 30.

  As shown in FIG. 25B, the other gripping side fitting portion UA of the gripping case 70 rotates in the separating direction with respect to the outer case 20 when the operating force of the gripping case 70 is smaller than the fourth separating force. Is regulated by the inner side fitting portion UD of the inner case 30.

  As shown in FIG. 25A, the grip-side fitting portion UA of the gripping case 70 moves in the separation direction with respect to the inner case 30 when the operation force in the separation direction of the gripping case 70 is smaller than the fourth separation force. The rotation is restricted by the inner side fitting portion UD of the inner case 30.

  That is, the gripping case 70 does not rotate with respect to the main body case 11 when the operation force in the coupling direction is smaller than the on operation force and the operation force in the separation direction is smaller than the fourth separation force in the off state.

The transition from the off state to the on state will be described.
In the off state of FIG. 25, when an operating force in the coupling direction larger than the on operating force is input to the gripping case 70, one gripping side fitting portion UC of the gripping case 70 is fitted into the inner side fitting of the inner case 30. Get over the joint UD in the joining direction. Thereby, the relative rotation state of the main body case 11 and the gripping case 70 shifts to the on state.

  The on-operation force corresponds to an operation force in the coupling direction necessary for one grip-side fitting portion UC to get over the inner-side fitting portion UD in the coupling direction. That is, it is smaller than the fourth coupling force required to change the rotation state of the main body case 11 and the gripping case 70 from the separated state to the off state. The on operation force corresponds to “operation force PA”.

  As shown in FIG. 23, the anode fitting 64 has a non-contact relationship with the energization fitting 67 in the off state. The tip portion of the anode fitting 64 gradually approaches the energization fitting 67 as the gripping case 70 is rotated in the connecting direction with respect to the main body case 11. And when the rotation state of the main body case 11 and the holding case 70 shifts from the off state to the on state, a closed circuit of the electrical component group 60 is formed in order to come into contact with the current-carrying metal fitting 67 (see FIG. 16). For this reason, the electric motor 41 rotates. In addition, the rotation position of the anode fitting 64 with respect to the energization fitting 67 in the off state corresponds to the “first electrode position”. Further, the rotation position of the anode fitting 64 with respect to the energization fitting 67 in the ON state corresponds to the “second electrode position”.

The transition from the off state to the separated state will be described.
In the off state of FIG. 25, when an operating force in the separating direction larger than the fourth separating force is input to the gripping case 70, the gripping side fitting portion UA of the gripping case 70 gets over the boundary rib UB3 in the separating direction. In addition, one gripping side fitting portion UC of the gripping case 70 gets over the inner side fitting portion UD of the inner case 30 in the separation direction. Thereby, the relative rotation state of the main body case 11 and the gripping case 70 shifts to the separated state.

  The fourth separation force is the separation direction operating force required for the gripping side fitting portion UA to get over the boundary rib UB3 in the separation direction, and one gripping side fitting portion UC separates the inner side fitting portion UD. This is equivalent to the combined operating force in the separation direction required to get over. Moreover, it is larger than the fourth binding force.

  The main body case 11 and the gripping case 70 rotate relatively over the first predetermined rotation amount around the Z axis in the process of shifting from the separated state to the off state or in the process of shifting from the off state to the separated state. Further, in the process of shifting from the off state to the on state or in the process of shifting from the on state to the off state, the motor rotates relatively about the Z axis over a second predetermined rotation amount. The second predetermined rotation amount is smaller than the first predetermined rotation amount. The first predetermined rotation amount corresponds to the “operation amount QB”. The second predetermined rotation amount corresponds to the “operation amount QA”.

Details of the ON state will be described with reference to FIG.
FIG. 26A shows a cross-sectional structure of the D22A-D22A plane of FIG. 22 when the main body case 11 and the gripping case 70 are on. FIG. 26B shows a cross-sectional structure of the D22B-D22B plane of FIG. 22 when the main body case 11 and the gripping case 70 are on.

  As shown in FIG. 26A, the grip-side fitting portion UA of the gripping case 70 is restricted from rotating in the separation direction with respect to the outer case 20 by the rotation restricting wall portion UB <b> 5 of the outer case 20.

  As shown in FIG. 26 (b), when the operating force of the gripping case 70 is smaller than the OFF operating force, the gripping side fitting portion UC of the gripping case 70 is rotated in the separating direction with respect to the inner case 30. 30 is regulated by the inner side fitting portion UD.

  That is, the gripping case 70 does not rotate with respect to the main body case 11 when the operation force in the separation direction is smaller than the off operation force in the on state. The rotation restricting wall portion UB5 of the outer case 20 disables the rotation of the gripping side fitting portion UA in the coupling direction. For this reason, regardless of the magnitude of the operation force input to the gripping case 70, the gripping case 70 does not rotate in the coupling direction with respect to the main body case 11 in the on state.

The transition from the on state to the off state will be described.
In the ON state of FIG. 26, when an operating force in the separation direction larger than the OFF operating force is input to the gripping case 70, one gripping side fitting portion UC of the gripping case 70 is fitted into the inner side fitting of the inner case 30. Get over the joint UD in the separation direction. Thereby, the relative rotation state of the main body case 11 and the gripping case 70 shifts to the off state.

The off-operation force corresponds to an operation force in the separation direction necessary for the grip-side fitting portion UC to get over the inner-side fitting portion UD in the separation direction. The off operation force is larger than the on operation force required to change the rotation state of the main body case 11 and the gripping case 70 from the off state to the on state. The off operation force corresponds to “operation force PA”.

The anode fitting 64 (see FIG. 23) is in contact with the energizing fitting 67 ( see FIG. 23) in the on state. Since the anode fitting 64 is separated from the energizing fitting 67 when the rotation state of the main body case 11 and the gripping case 70 shifts from the on state to the off state, the closed circuit of the electrical component group 60 is blocked (see FIG. 16). For this reason, the rotation of the electric motor 41 is stopped.

  The shape of the anode fitting 64 will be described with reference to FIG. FIG. 27A shows a planar structure of the anode fitting 64. FIG. 27 (b) shows the left side structure of the anode fitting 64. FIG. 27C shows a front structure of the anode fitting 64.

The anode fitting 64 is fitted into the anode fitting portion 64A that contacts the anode of the dry battery 3 (see FIG. 30) , the two fitting contact portions 64B that contact the energizing fitting 67, and the fixed portion 74 of the holding case 70. 64C. The current-carrying metal fitting 67 (see FIG. 29) contacts one of the two metal fitting contact portions 64B.

  Each fitting portion 64 </ b> C has a hooking portion 64 </ b> D that is hooked on the inner surface of the gripping case 70. The tip portion of each hook portion 64D has a shape that narrows toward the tip. Each metal fitting contact portion 64B is inclined from the downward direction ZB toward the upward direction ZA from the connection portion with the fitting portion 64C toward the tip portion. The tip end portion of each metal fitting contact portion 64B is curved toward the energizing metal fitting 67 side.

  The anode contact portion 64A, each fitting portion 64C, each hooking portion 64D, and each metal fitting contact portion 64B are formed of a single continuous metal plate. The anode contact portion 64A is located in the upward direction ZA with respect to each fitting portion 64C and each hooking portion 64D. The tip end portion of each metal contact portion 64B is located in the upward direction ZA from the anode contact portion 64A when not in contact with the inner case 30 or the energizing metal fitting 67 (see FIG. 29).

Details of the electrode structure of the gripping case 70 will be described with reference to FIGS.
FIG. 28A shows a planar structure of the gripping case 70 with the anode fitting 64 removed. FIG. 28B shows a state in which the inner case 30 is omitted in the cross-sectional structure of the D22C-D22C plane of FIG. FIG. 28C shows a cross-sectional structure of the D22C-D22C plane of FIG.

  The fitting portion 64 </ b> C of the anode metal fitting 64 is fitted into the fixed portion 74 of the gripping case 70. Each catching portion 64 </ b> D is pressed against the inner surface of the gripping case 70. The fitting of the fixed portion 74 and the fitting portion 64 </ b> C and the contact between the inner surface of the gripping case 70 and the hooking portion 64 </ b> D regulate the rotation and movement of the anode fitting 64 with respect to the lower wall portion 72 of the gripping case 70. In the inner surface of the gripping case 70, the boundary portion from the inner surface of the outer peripheral wall portion 71 to the inner surface of the lower wall portion 72 and a portion in the vicinity thereof have a smoothly curved shape. Each hooking portion 64D is pressed against the curved portion.

  As shown in FIGS. 28 (b) and 29 (a), when the inner case 30 is not inserted into the gripping case 70, the anode fitting 64 has the tip portion of each fitting contact portion 64B at the anode contact portion 64A. And it is located in the upper direction ZA than the restricting portion 75.

  As shown in FIGS. 28 (c) and 29 (b), the wall portion of the opening portion 31A of the inner case 30 is brought into contact with the tip portion of each metal contact portion 64B, thereby lowering each metal contact portion 64B. Push down in direction ZB. The fitting contact portion 64B does not contact the bent portion 67B of the energizing fitting 67 when the rotation position of the gripping case 70 with respect to the main body case 11 is the off position.

  As shown in FIG. 30A, the gripping case 70 contacts the anode contact portion 64A and the anode of the dry cell 3 when the inner case 30 in which the dry cell 3 is inserted into the battery holding portion 31 is inserted. Let

  As shown in FIG. 30 (b), the restriction portion 75 of the lower wall portion 72 faces the dry battery 3 through a gap. The end surface of the opening portion 31 </ b> A of the inner case 30 is located in the lower direction ZB with respect to the anode plane 3 </ b> A of the dry battery 3. The bent portion 67 </ b> B of the current-carrying metal fitting 67 is located in the downward direction ZB of the end surface of the opening portion 24. Moreover, it is located outward from the inner surface of the opening portion 31A. That is, the bent portion 67 </ b> B is located at a place where it is difficult to contact the dry battery 3.

The operation of the electric toothbrush 2 will be described with reference to FIG.
When the user vibrates the brush head 52 when using the electric toothbrush 2, the user rotates the gripping case 70 in the coupling direction with respect to the main body case 11. That is, the relative rotation state of the main body case 11 and the gripping case 70 is changed from the off state to the on state. The anode metal fitting 64 contacts the energizing metal fitting 67 with the change from the off state to the on state. Thereby, the closed circuit which electrically connects the dry cell 3 and the electric motor 41 is formed.

  The electric motor 41 rotates the output shaft 42 and the eccentric weight 43 by the current supplied from the dry battery 3. Vibration generated by the rotation of the eccentric weight 43 is transmitted to the toothbrush attachment 50 through the main body case 11. For this reason, the brush head 52 and each bristle bundle 51 vibrate as the electric motor 41 rotates.

(Effect of embodiment)
The portable oral hygiene device 1 of this embodiment has the following effects.
(1) The main body case 11 and the gripping case 70 of the electric toothbrush 2 have a gripping coupling structure U that enables relative movement between the main body case 11 and the gripping case 70. The grip coupling structure U has a function as a switch of the electric motor 41. According to this configuration, the switch part of the electric motor 41 can be omitted. For this reason, it contributes to size reduction of the electric toothbrush 2.

  (2) The toothbrush body 10 of the electric toothbrush 2 does not have the switch part of the electric motor 41 in the intermediate coupling portion 22 of the outer case 20. According to this configuration, the length of the electric toothbrush 2 in the longitudinal direction is smaller than that in the configuration in which the intermediate coupling portion 22 of the outer case 20 has the switch part.

  (3) The grip coupling structure U has a structure that allows relative rotation between the main body case 11 and the grip case 70. According to this configuration, the length of the electric toothbrush 2 in the longitudinal direction does not change when the gripping case 70 is operated to select ON / OFF of the switch of the electric motor 41. For this reason, the user can feel downsizing even while using the electric toothbrush 2.

(4) The grip coupling structure U is a structure that allows relative rotation between the main body case 11 and the grip case 70, the lower grip coupling structure UY that functions as a switch of the electric motor 41, the main body case 11, and the grip case And an upper grip coupling structure UX that couples and separates 70 from each other. According to this configuration, since the two functions are given to the relative rotation of the main body case 11 and the gripping case 70, compared with the configuration that gives the above functions for each of the different movements, This contributes to the miniaturization of the electric toothbrush 2.

(5) The on-operation force and the off-operation force for changing the power on and off of the electric motor 41 in the lower grip coupling structure UY are for separating the main body case 11 and the grip case 70 in the upper grip coupling structure UX . Less than the fourth separation force. According to this configuration, the gripping case 70 is less likely to be separated from the main body case 11 in accordance with an operation for changing the power on and off of the electric motor 41.

  (6) The upper grip coupling structure UX has a reverse direction as a rotation direction for separating the grip case 70 from the main body case 11. The lower gripping coupling structure UY has a normal rotation direction as a rotation direction for changing the power source of the electric motor 41 from OFF to ON. According to this configuration, the gripping case 70 is prevented from being separated from the main body case 11 due to the operation for changing the power source of the electric motor 41 from OFF to ON.

(7) The lower gripping and coupling structure UY has a second predetermined operation amount as an operation amount for changing on and off of the power supply of the electric motor 41. The upper grip coupling structure UX has a first predetermined operation amount as an operation amount for changing the coupling and separation of the main body case 11 and the grip case 70. The second predetermined operation amount is smaller than the first predetermined operation amount. According to this configuration, the gripping case 70 is less likely to be separated from the main body case 11 with the operation for turning on and off the electric motor 41.

  (8) The main body case 11 and the toothbrush attachment 50 have a toothbrush coupling structure S that allows the main body case 11 and the toothbrush attachment 50 to be coupled and separated from each other. The toothbrush coupling structure S couples or separates the main body case 11 and the toothbrush attachment 50 by relative movement in the longitudinal direction between the main body case 11 and the toothbrush attachment 50. According to this configuration, the functional component is moved in the Z direction with respect to the main body case, a part of the main body case is entered into the functional component, and then the functional component and the main case are rotated by rotating the functional component into the main body case. The main body case 11 and the toothbrush attachment 50 can be easily coupled as compared with the coupling structure coupled to each other. An example of the coupling structure described here as a comparative example is a rotary coupling structure 55 for coupling and separating another structural case and the toothbrush attachment 50 from each other.

  (9) The anode fitting 64 is fixed to the lower side wall 72 of the gripping case 70. According to this configuration, the position of the anode fitting 64 relative to the energizing fitting 67 can be changed with the rotation of the gripping case 70 relative to the main body case 11.

  (10) The main body case 11 has a current-carrying metal fitting 67 connected to the anode of the dry battery 3. The anode fitting 64 has a first electrode position that does not contact the current-carrying metal fitting 67 and a second electrode position that contacts the current-carrying metal fitting 67. The gripping and coupling structure U changes the first electrode position and the second electrode position of the anode fitting 64 by relative rotation between the main body case 11 and the gripping case 70. According to this configuration, since the power source of the electric motor 41 is selected to be turned off and on by the operation of the gripping case 70 gripped during brushing, the user can intuitively operate the power source of the electric motor 41.

  (11) The gripping case 70 has a restricting portion 75 that restricts the anode contact portion 64A and the cathode of the dry battery 3 from contacting each other. The restricting portion 75 is formed of a nonconductive material. The distal end portion of the restricting portion 75 is located closer to the battery holding portion 31 than the anode contact portion 64 </ b> A in the longitudinal direction of the gripping case 70. According to this configuration, when the cathode of the dry battery 3 is accommodated in the battery holding portion 31 in a state of facing the anode metal fitting 64, the cathode of the dry battery 3 comes into contact with the regulating portion 75 and through the gap between the anode contact portion 64A and the anode contact portion 64A. opposite. That is, the cathode of the dry battery 3 does not contact the anode contact portion 64A. For this reason, generation | occurrence | production of a short circuit is suppressed.

  (12) Since the electric toothbrush 2 has a portable structure, the physique is smaller than a stationary electric toothbrush. For this reason, it is difficult for a user who is familiar with a stationary electric toothbrush to grip the gripping case during brushing because the area of the electric toothbrush 2 in contact with the hand is smaller than that of the stationary electric toothbrush. There is a risk of feeling. On the other hand, the electric toothbrush 2 has a decorative ring 12 protruding outward from the gripping outer surface 70Z. The decorative ring 12 prevents the gripping case 70 from slipping with respect to the user's hand by being caught by the user's hand. For this reason, a user who has been able to use a stationary electric toothbrush can reduce the above-mentioned uncomfortable feeling by holding the gripping case 70 with the decorative ring 12 as a non-slip.

  (13) The gripping case of the electric toothbrush of Patent Document 1 has a smooth curved outer surface in order to enhance aesthetics. For this reason, there is a possibility that the gripping case slips with respect to the user's hand during brushing. On the other hand, since the electric toothbrush 2 has the decorative ring 12, the operability when used as the electric toothbrush of Patent Document 1 is improved.

  (14) The energizing metal fitting 67 is fixed to the outer surface of the battery holding portion 31 of the inner case 30. According to this configuration, the possibility that the current-carrying metal fitting 67 contacts the cathode metal fitting 63 is small. Further, as compared with the configuration in which the current-carrying metal fitting 67 is fixed to the inner surface of the battery holding portion 31, the work for the current-carrying metal fitting 67 to the battery holding portion 31 is facilitated.

  (15) The battery holding portion 31 has a cutout portion 31 </ b> C for inserting and removing the dry battery 3. According to this structure, when taking out the dry cell 3 from the battery holding part 31, it becomes possible to grasp the outer peripheral surface of the dry cell 3 exposed in the notch part 31C. For this reason, the operation | work which takes out the dry cell 3 from the battery holding part 31 becomes easy.

  (16) The battery holding portion 31 has a sandwiching portion 31B that is inclined from the outside to the inside. According to this configuration, when the dry battery 3 is inserted into the battery holding portion 31, the dry battery 3 pushes the holding portions 31B outward, so that the restoring force of each holding portion 31B causes the dry battery 3 to move against the battery holding portion 31. The position is difficult to change.

  (17) The main body case 11 has a circuit board 61 connected to the cathode fitting 63 and the anode fitting 64. The circuit board 61 has a current fuse 62. According to this configuration, an energization path from the dry battery 3 to the electric motor 41 can be easily formed. Further, when a short circuit occurs in the dry battery 3, it is possible to suppress a large current from flowing through the dry battery 3.

  (18) The current-carrying metal fitting 67 has a straight portion 67A and a bent portion 67B. According to this configuration, when the bent portion 67B comes into contact with the current-carrying metal fitting 67 with the rotation of the gripping case 70 with respect to the main body case 11, the current-carrying metal fitting 67 is compared with the configuration in which the edge portion of the metal fitting comes into contact with the current-carrying metal fitting 67. The anode metal fitting 64 is hard to be scraped when it comes into contact.

  (19) The main body case 11 has the elastic member 25 in the upward direction ZA with respect to the joint portion between the outer case 20 and the inner case 30. That is, the elastic member 25 seals the gap between the main body case 11 and the gripping case 70 by contacting the gripping inner surface 70 </ b> W near the opening 73 of the gripping case 70. According to this configuration, entry of foreign matter into the main body case 11 is suppressed. Moreover, since the effect which suppresses a foreign material approach is acquired by the one elastic member 25, the physique of the toothbrush main body 10 can be made small compared with the structure which show | plays the same effect by several elastic members.

  (20) The main body coupling structure T includes an inner side fitting portion TA of the inner case 30 and an outer side fitting portion TB of the outer case 20. The inner side fitting portion TA is connected to the base portion 31F of the inner case 30 by three support portions 31G. According to this configuration, the strength of the inner side fitting portion TA is higher than the configuration in which the inner side fitting portion TA is not connected to the base portion 31F by the support portion 31G.

  (21) The toothbrush coupling structure S has an outer side fitting part SA of the upper coupling part 21 and a toothbrush side fitting part SB of the toothbrush attachment 50. The outer side fitting portion SA has a structure that restricts rotation of the toothbrush attachment 50 with respect to the upper coupling portion 21. According to this configuration, in a state where the toothbrush attachment 50 is attached to the upper coupling portion 21, the toothbrush attachment 50 is suppressed from rotating with respect to the upper coupling portion 21.

  (22) The upright wall portion SA1 of the outer side fitting portion SA has a function of imparting an operational feeling to the toothbrush attachment 50 and a function of regulating the rotation of the toothbrush attachment 50. According to this configuration, the toothbrush coupling structure S can be reduced in size as compared with a configuration in which these two functions are provided to individual components.

(Second Embodiment)
The portable oral hygiene device 1 of this embodiment shown in FIG. 31 has the following differences as main differences from the portable oral hygiene device 1 of the first embodiment shown in FIG. That is, the electric toothbrush 2 of the portable oral hygiene device 1 of the first embodiment has the toothbrush attachment 50 as one functional component. On the other hand, the electric toothbrush 2 of the portable oral hygiene device 1 of the present embodiment includes a toothbrush attachment 50 and a stain care attachment 100 as two functional parts. Below, the detail of a different point from the electric toothbrush 2 of 1st Embodiment is demonstrated, about the structure which is common in 1st Embodiment, the same code | symbol is attached | subjected and the part or all of the description is abbreviate | omitted.

  Fig.31 (a) shows the electric toothbrush 2 which fractured | ruptured the toothbrush attachment 50 in XZ plane in Fig.2 (a). The toothbrush body 10 has a stain care attachment 100. The stain care attachment 100 is coupled to the upper coupling portion 26 of the outer case 20. Moreover, it is located in the space in the toothbrush attachment 50.

FIG. 31 (b) shows the electric toothbrush 2 in a state where the toothbrush attachment 50 is omitted in FIG. 31 (a) and the stain care attachment 100 is separated from the upper coupling portion 26. The upper coupling portion 26 includes a concave fitting portion 26B for fitting the stain care attachment 100, and a tip support portion 26C that supports the stain care attachment 100 in the Z direction. In addition to this, the upper coupling portion 26 seals the gap between the guide groove 26A having the same shape as the guide groove 21A of the upper coupling portion 21 of the first embodiment and the inner surface of the toothbrush attachment 50 and the outer surface of the upper coupling portion 26. And an elastic member 27. The other configuration of the upper coupling portion 26 is common to the configuration of the upper coupling portion 21 of the first embodiment.

  The stain care attachment 100 includes a convex fitting portion 101 that is fitted into the concave fitting portion 26B, and a care portion 102 that polishes teeth. The care portion 102 has a working surface 103 that inclines from the rear direction XB to the front direction XA as it goes from the upper direction ZA to the lower direction ZB. As a material for the stain care attachment 100, silicon rubber containing an abrasive is used.

  The main body case 11 has a central axis orthogonal to the XY plane. The stain care attachment 100 has a central axis orthogonal to the XY plane. In the XZ plane of the electric toothbrush 2, the central axis of the stain care attachment 100 is located in the rear direction XB with respect to the central axis of the main body case 11. Further, the central axis of the stain care attachment 100 and the central axis of the main body case 11 are parallel to each other.

(Effect of embodiment)
The portable oral hygiene device 1 of the present embodiment has the following effects in addition to the effects (1) to (22) exhibited by the portable oral hygiene device 1 of the first embodiment.

  (23) The electric toothbrush 2 includes a toothbrush attachment 50 as a first functional component and a stain care attachment 100 as a second functional component. According to this configuration, two sanitary operations can be performed on the oral cavity with one electric toothbrush 2.

  (24) The stain care attachment 100 is coupled to the upper coupling portion 26 of the main body case 11. For this reason, compared with the structure which cannot couple | bond the stain care attachment 100 with the upper coupling part 26, management of the attachment 100 becomes easy.

(Other embodiments)
The present invention includes embodiments other than the first and second embodiments. Hereinafter, modifications of the first and second embodiments as other embodiments of the present invention will be described. The following modifications can be combined with each other.

  The electric toothbrush 2 of the second embodiment has a structure that couples and separates the outer case 20 and the stain care attachment 100 from each other. On the other hand, the electric toothbrush 2 of the modification has a structure in which the stain care attachment 100 is fixed to the outer case 20. That is, the stain care attachment 100 cannot be separated from the outer case 20.

  The electric toothbrush 2 of the second embodiment has a central axis in which the convex fitting portion 101 of the stain care attachment 100 is eccentric with respect to the upper coupling portion 26 of the outer case 20. On the other hand, in the electric toothbrush 2 of the modification, the upper coupling portion 26 of the outer case 20 and the convex fitting portion 101 of the stain care attachment 100 are coaxial.

  -The electric toothbrush 2 of 2nd Embodiment has the stain care attachment 100 as a 2nd functional component. On the other hand, the electric toothbrush 2 of a modification has a nail brush attachment or a gum massage attachment as a second functional component.

  -The electric toothbrush 2 of 2nd Embodiment has the toothbrush attachment 50 as a 1st functional component, and has the stain care attachment 100 as a 2nd functional component. On the other hand, the electric toothbrush 2 of a modification has the 1st functional component and 2nd functional component of the combination of the following (A)-(F).

  (A) The electric toothbrush 2 of a modification has the toothbrush attachment 50 as a 1st functional component. The second functional component includes any one functional component of a toothbrush attachment, a gum massage attachment, a point brush, a nail brush attachment, a dentifrice tube, and a vibration adjusting bell.

  (B) The electric toothbrush 2 of a modification has a gum massage attachment as a first functional component. In addition, as a second functional component, any one functional component of a toothbrush attachment, a gum massage attachment, a point brush, a nail brush attachment, a dentifrice tube, a vibration adjustment bell, an interdental brush, and a stain care attachment Have.

  (C) The electric toothbrush 2 of a modification has a point brush as a 1st functional component. The second functional component includes any one functional component of point brush, toothbrush attachment, gum massage attachment, nail brush attachment, dentifrice tube, vibration adjustment bell, interdental brush, and stain care attachment. .

  (D) The electric toothbrush 2 of a modification has an attachment for nail brushing as a 1st functional component. The second functional component includes any one functional component of a toothbrush attachment, a gum massage attachment, a point brush, a dentifrice tube, a vibration adjusting bell, an interdental brush, and a stain care attachment.

  (E) The electric toothbrush 2 of a modification has a stain care attachment as a 1st functional component. In addition, as the second functional component, any one of a stain care attachment, a toothbrush attachment, a gum massage attachment, a point brush, a nail brush attachment, a dentifrice tube, a vibration adjustment bell, an interdental brush, and a paste tube Has functional parts.

  (F) The electric toothbrush 2 of a modification has an interdental brush as a 1st functional component. The second functional component includes any one functional component of an interdental brush, a toothbrush attachment, a gum massage attachment, a point brush, a nail brush attachment, a dentifrice tube, and a vibration adjusting bell.

  The electric toothbrush 2 having a vibration adjusting weight among the electric toothbrushes 2 of the modified examples (A) to (F) has a structure for coupling and separating the toothbrush body 10 and the weight from each other. When the weight is combined with the toothbrush main body 10, the vibration generator 40 reduces the vibration given to a 1st functional component or a 2nd functional component. On the other hand, when the weight is separated from the toothbrush body 10, the vibration applied to the first functional component or the second functional component is larger than when the weight is coupled. That is, the weight adjusts the magnitude of vibration that the vibration generator 40 imparts to the first functional component or the second functional component.

  -The electric toothbrush 2 of 2nd Embodiment has the stain care attachment 100 formed of silicon rubber. On the other hand, the electric toothbrush 2 of a modified example has a metal material subjected to knurling as a stain care attachment.

  -The electric toothbrush 2 of 1st and 2nd embodiment has the current fuse 62 between the electricity supply metal fitting 67 and the anode terminal of the output side of the circuit board 61. FIG. On the other hand, the electric toothbrush 2 of the modification has a current fuse 62 between the cathode fitting 63 and the cathode terminal on the output side of the circuit board 61.

  -The electric toothbrush 2 of 1st and 2nd embodiment has the decoration ring 12 comprised separately from the main body case 11. As shown in FIG. On the other hand, the electric toothbrush 2 of the modified example has a portion corresponding to the decorative ring 12 formed as a part of the main body case 11 instead of the decorative ring 12. Alternatively, in place of the decorative ring 12, a portion corresponding to the decorative ring 12 formed as a part of the gripping case 70 is provided.

  In the electric toothbrush 2 of the first and second embodiments, when the rotation position of the gripping case 70 with respect to the main body case 11 is the on position, the gripping outer surface 70Z does not form an integral outer surface with respect to the cap outer surface 80Z. On the other hand, in the electric toothbrush 2 of the modification, the gripping outer surface 70Z forms an outer surface integral with the cap outer surface 80Z when the rotation position of the gripping case 70 with respect to the main body case 11 is the on position and the off position. The formation of an integral outer surface indicates a state in which one outer surface is extended to form a virtual surface, and the other outer surface belongs to the virtual surface.

  The electric toothbrush 2 as an example of the modified example has a cap having an N-shaped cross section in the XY plane instead of the cap 80, and has a gripping case having an N-shaped cross section in the XY plane instead of the gripping case 70. . In the N-shaped cap and the N-shaped gripping case, the outer surface of the cap and the gripping case forms an integral outer surface when the relative rotation position is the off position and the on position, respectively. At this time, the rotation angle of the gripping case for changing from the off position to the on position is defined by “360 degrees / N degrees”.

  The electric toothbrush 2 of the first and second embodiments has a structure that allows the gripping case 70 to rotate with respect to the main body case 11 as the gripping coupling structure U. On the other hand, the electric toothbrush 2 of the modified example has a structure capable of relative movement in the longitudinal direction between the main body case 11 and the gripping case 70 instead of or in addition to the rotation of the gripping case 70 with respect to the main body case 11. The electric toothbrush 2 turns off the electric motor 41 when the gripping case 70 is located at a first predetermined position in the longitudinal direction with respect to the main body case 11. On the other hand, when the gripping case 70 is located at the second predetermined position in the longitudinal direction with respect to the main body case 11, the electric motor 41 is turned on.

  The gripping and coupling structure U of the electric toothbrush 2 according to the first and second embodiments has a structure in which the entire gripping case 70 rotates with respect to the main body case 11. On the other hand, the gripping and coupling structure U of the electric toothbrush 2 according to the modification has two gripping cases (hereinafter referred to as “divided gripping cases”) that can be individually rotated with respect to the main body case 11. The divided gripping case has a lower divided case including the lower wall portion 72 to the middle portion in the Z direction, and an upper divided case including the middle portion to the opening portion 73. The configuration of the divided gripping case including the lower split case and the upper split case is in accordance with the configuration of the gripping case 70. The gripping and coupling structure U of this modification has a structure in which the lower divided case rotates with respect to the main body case 11. The relative rotation state of the main body case 11 and the lower divided case has a separated state, an off state, and an on state, similarly to the relative rotation state of the main body case 11 and the gripping case 70.

  The electric toothbrush 2 of the first and second embodiments has an electric motor 41 in the upper coupling portion 21 of the outer case 20. On the other hand, the modified electric toothbrush 2 has an electric motor 41 in the intermediate coupling portion 22. Alternatively, the electric motor 41 is provided across the intermediate coupling portion 22 and the lower coupling portion 23.

-The decoration ring 12 of 1st and 2nd embodiment has a structure where the decoration surface 12Z contacts two or more points with respect to the mounting surface in which the portable oral hygiene apparatus 1 is mounted . On the other hand, the decoration ring 12 of a modification has a plane which contacts a mounting surface . The flat surface restricts the portable oral hygiene device 1 from rotating with respect to the placement surface .

  The portable oral hygiene device 1 according to the first and second embodiments has the electric toothbrush 2 and the cap 80. On the other hand, the portable oral hygiene device 1 of the modified example omits the cap 80. That is, the electric toothbrush 2 alone constitutes the entire portable oral hygiene device 1.

In the first and second embodiments, the dry battery 3 is used as the power source for the electric toothbrush 2. On the other hand, the electric toothbrush 2 of the modification uses a secondary battery as a power source.
The present invention can also be applied to other oral hygiene devices other than the portable oral hygiene device 1 exemplified in the first and second embodiments. Examples of other oral hygiene devices include a stain removing device. The stain removing device includes a polishing portion for polishing teeth, an electric motor that vibrates the polishing portion, a main body case that holds the electric motor, and a gripping case that covers an outer surface of the main body case. The main body case and the gripping case have a relative motion structure that enables relative motion between the main body case and the gripping case. The relative operation structure functions as a switch for the electric motor.
In short, any device can be used as long as it is an oral hygiene device including a functional component that acts on the oral cavity, an electric motor that operates the functional component, a main body case that holds the electric motor, and a gripping case that covers the outer surface of the main body case. The present invention can also be applied to this.

  (Additional note regarding means for solving the problem)
  (Appendix 1)
  In an oral hygiene device including a functional component that acts on the oral cavity, an electric motor that operates the functional component, a main body case that holds the electric motor, and a gripping case that covers an outer surface of the main body case,
  The main body case and the gripping case have a relative motion structure that enables relative motion between the main body case and the gripping case,
  The relative operation structure functions as a switch of the electric motor.
  Oral hygiene device.
  (Appendix 2)
  The relative motion structure has a structure capable of relative rotation between the main body case and the gripping case.
  The oral hygiene device according to appendix 1.
  (Appendix 3)
  The relative operation structure includes a first rotation position for turning off the electric motor and a second rotation position for turning on the electric motor as relative rotation positions of the main body case and the gripping case. Have
  The outer surface of the main body case and the outer surface of the gripping case form an integral outer surface at at least one of the first rotation position and the second rotation position.
  The oral hygiene device according to appendix 2.
  (Appendix 4)
  The relative motion structure is a structure that enables relative rotation between the main body case and the gripping case, and the first rotation structure that functions as a switch of the electric motor is coupled to the main body case and the gripping case. And a second rotating structure that separates
  The oral hygiene device according to appendix 2 or 3.
  (Appendix 5)
  The first rotating structure and the second rotating structure have different rotation directions.
  The oral hygiene device according to appendix 4.
  (Appendix 6)
  The operating force PA for changing ON / OFF of the power source of the electric motor in the first rotating structure is the operating force PB for changing the coupling and separation of the main body case and the gripping case in the second rotating structure. Smaller than
  The oral hygiene device according to appendix 4 or 5.
  (Appendix 7)
  The operation amount QA for changing ON / OFF of the power source of the electric motor in the first rotation structure is the operation amount QB for changing the coupling and separation of the main body case and the gripping case in the second rotation structure. Smaller than
  The oral hygiene device according to any one of appendices 4 to 6.
  (Appendix 8)
  The relative motion structure has a structure capable of relative movement in the longitudinal direction between the main body case and the gripping case.
  The oral hygiene device according to any one of appendices 1 to 3.
  (Appendix 9)
  The main body case and the functional component have a component coupling structure in which the main body case and the functional component can be coupled and separated from each other,
  The component coupling structure couples or separates the main body case and the functional component by relative movement of the main body case and the functional component in the longitudinal direction.
  The oral hygiene device according to any one of appendices 1 to 8.
  (Appendix 10)
  Having a gripping side electrode in contact with the cathode or anode of the battery;
  The grip side electrode is fixed to the bottom wall of the grip case.
  The oral hygiene device according to any one of appendices 1 to 9.
  (Appendix 11)
  The main body case has a conductive member connected to the cathode or anode of the battery,
  The grip side electrode has a first electrode position that does not contact the conductive member, and a second electrode position that contacts the conductive member,
  The relative operation structure changes the first electrode position and the second electrode position of the grip-side electrode by a relative operation of the main body case and the grip case.
  The oral hygiene device according to appendix 10.
  (Appendix 12)
  The main body case includes a battery holding portion that holds the battery, and a circuit board that supplies power of the battery to the electric motor,
  The functional component, the electric motor, the circuit board, and the battery holding portion are arranged from one side to the other in the longitudinal direction of the oral hygiene device, and the functional component, the electric motor, the circuit board, and the battery holding portion. Located in the order
  The battery holding portion has a holding opening portion facing the bottom wall of the gripping case,
  The conductive member is fixed to the battery holding portion and has a length extending from the circuit board to the holding opening portion.
  The oral hygiene device according to appendix 11.
  (Appendix 13)
  The gripping side electrode has an anode contact portion connected to the anode of the battery,
  The gripping case has a restricting part that restricts the anode contact part and the cathode of the battery from contacting each other,
  The restriction portion is formed of a non-conductive material,
  The leading end portion of the restriction portion is located closer to the battery holding portion side than the anode contact portion in the longitudinal direction of the gripping case.
  The oral hygiene device according to any one of appendices 10 to 12.
  (Appendix 14)
  A toothbrush component as the functional component capable of being coupled and separated from the main body case, the electric motor having an output shaft with an eccentric weight, and a cap capable of being coupled and separated from the main body case or the gripping case And having
  The oral hygiene device according to any one of appendices 1 to 13.

  1: Portable oral hygiene device (oral hygiene device)
  1Z: External surface
  2: Electric toothbrush
  2Z: External surface
  3: Dry cell
  3A: Anode plane
  10: Toothbrush body
  11: Body case
  12: Decoration ring
  12A: Decoration part
  12Z: Decorative surface
  20: Outer case
  20Z: Outer outer surface
  21: Upper joint part
  21A: Guide groove
  22: Intermediate bond part
  22A: Fixed part
  22B: Mating groove
  22C: Opposing surface
  23: Lower joint part
  24: Opening portion
  25: Elastic member
  26: Upper joint part
  26A: Guide groove
  26B: concave fitting part
  26C: tip support portion
  27: Elastic member
  30: Inner case
  30Z: Inner outer surface
  31: Battery holding part
  31A: Opening portion
  31B: clamping part
  31C: Notch
  31D: Cathode insertion part
  31E: Anode insertion part
  31F: Basic part
  31G: Support part
  32: Substrate holding part
  32A: Connection part
  32B: Hook part
  33: Device holding part
  40: Vibration generator
  41: Electric motor
  42: output shaft
  43: Eccentric weight
  44: Spacer
  50: Toothbrush attachment (functional part)
  50Z: Toothbrush surface
  51: Bristle bundle
  52: Brush head
  53: Brush stay
  54: Guide rib
  55: Rotation coupling structure
  56: concave fitting portion
  56A: Regulatory aspect
  57: Operation feeling imparting section
  57A: Guide slope
  57B: Regulatory Elevation
  57C: Intermediate curved surface
  58: Rotation guide groove
  59: Opening portion
  60: Electrical component group
  61: Circuit board
  62: Current fuse
  63: Cathode fitting (first fitting, second fitting)
  64: Anode bracket (first bracket, second bracket)
  64A: anode contact portion (first contact portion)
  64B: bracket contact part (second contact part)
  64C: fitting part
  64D: Hook part
  65: Cathode lead wire
  66: Anode lead wire
  67: Energizing bracket (conductive member)
  67A: Straight line part
  67B: Bent part
  70: gripping case
  70W: gripping inner surface
  70Z: gripping outer surface
  71: outer peripheral wall
  72: Lower side wall
  72A: Intermediate recess
  72B: Groove
  72C: Ventilation hole
  73: Opening portion
  74: Fixed part
  75: Regulatory part
  76: Vertical rib
  80: Cap
  80W: inner surface of cap
  80Z: Cap outer surface
  81: outer peripheral wall
  82: Upper side wall
  82A: Ventilation hole
  83: Contact portion
  84: Opening portion
  100: Stain care attachment
  101: Convex fitting part
  102: Care part
  103: Working surface
  R: Cap coupling structure
  RA: Outer side fitting part
  RB: Cap side fitting part
  S: Toothbrush coupling structure
  SA: Outer side fitting part
  SA1: Upright wall
  SA2: Bonding side contact surface
  SA3: Separation side contact surface
  SA4: Intermediate recess
  SB: toothbrush side fitting part
  T: Body coupling structure
  TA: Inner side fitting part
  TB: outer side fitting part
  U: Grasping coupling structure (relative motion structure)
  UX: Upper grip coupling structure
  UA: Gripping side fitting part
  UB: Outer side fitting part
  UB1: First rotation groove
  UB2: Second rotation groove
  UB3: Boundary rib
  UB4: Rotation restriction wall
  UB5: Rotation restriction wall
  UY: Lower grip coupling structure
  UC: Gripping side fitting part
  UD: Inner side fitting part
  LA: Projection amount
  LB: Projection amount
  LC: protrusion amount
  LD: Projection amount
  XA: Forward direction
  XB: backward direction
  YA: Right direction
  YB: Left direction
  ZA: Up direction
  ZB: Downward

Claims (14)

  An electric motor driven by power supplied from a power source;
  A main body case to which the power supply can be attached and holding the electric motor;
  A functional component provided in the body case and driven by the electric motor;
  A gripping case covering the outer surface of the main body case;
  A first fitting provided in the main body case and electrically connectable to the first electrode of the power source;
  A second metal fitting provided between the bottom of the gripping case and the lower portion of the main body case in the gripping case and electrically connectable to the second electrode of the power source;
  A conductive member provided in the main body case and electrically connected to the first metal fitting;
  By rotating the main body case and the gripping case relatively, the conductive member and the second metal fitting are relatively rotated, and the conductive member and the second metal fitting are not electrically connected. A relative operation structure capable of switching between an off state and an on state of the power source in which the conductive member and the second metal fitting are electrically connected to each other.
  Oral hygiene device.   The second metal fitting includes a first contact portion capable of contacting the second electrode of the power source, and a second contact portion connected to the first contact portion and displaceable with respect to the first contact portion,
  The relative motion structure changes the relative position between the lower part of the main body case and the second contact portion by relatively rotating the main body case and the gripping case,
  When the lower part of the main body case pushes down the second contact part, the second contact part is separated from the conductive member to form the power off state, and the lower part of the main body case is separated from the second contact part. As a result, the second contact portion comes into contact with the conductive member, and the power-on state is formed.
  The oral hygiene device according to claim 1.   The first contact portion is disposed at the center of the bottom of the gripping case;
  The shape of the second contact portion is a curved shape along the inner peripheral surface of the gripping case.
  The oral hygiene device according to claim 2.   The relative movement structure includes a first rotation structure and a second rotation structure;
  The first rotating structure switches between an off state and an on state of the power source;
  The second rotating structure switches a coupling state and a separation state of the main body case and the gripping case.
  The oral hygiene device according to any one of claims 1 to 3.   The relative rotation direction of the main body case and the gripping case for switching the power source from the off state to the on state by the first rotating structure, and the main body case and the gripping case from the coupled state by the second rotating structure. The relative rotation direction of the main body case and the gripping case for switching to the separated state is different.
  The oral hygiene device according to claim 4.   The relative operation structure is configured such that the main body case and the gripping case rotate relative to each other in a first rotation direction from a relative rotation position of the main body case and the gripping case where the power-off state is formed. The power source is switched from an off state to an on state, and the main body case and the gripping case are defined as being in the first rotation direction from a relative rotational position of the main body case and the gripping case where the power off state is formed. The main body case and the gripping case are switched from the coupled state to the separated state by relatively rotating in the opposite second rotational direction.
  The oral hygiene device according to claim 5.   The operating force for switching the power supply OFF state and ON state in the first rotating structure is smaller than the operating force for switching the coupling state and separation state of the main body case and the gripping case in the second rotating structure.
  The oral hygiene device according to claim 5 or 6.   The operation amount for switching the power supply OFF state and ON state in the first rotation structure is smaller than the operation amount for switching the coupling state and separation state of the main body case and the gripping case in the second rotation structure.
  The oral hygiene device according to any one of claims 5 to 7.   The body case includes an upper coupling part, a battery holding part, and a device holding part,
  The upper coupling part is a part that protrudes to the outside from the upper part of the gripping case and holds the functional component,
  The battery holding portion is provided on the bottom side of the gripping case with respect to the upper coupling portion, constitutes a lower portion of the main body case, and is a portion to which a battery as the power source can be attached,
  The device holding portion is a portion that is provided in the upper coupling portion and holds the electric motor.
  The oral hygiene device according to any one of claims 1 to 8.   The battery holding portion includes a groove provided on the outer periphery,
  The conductive member is fitted in the groove
  The oral hygiene device according to claim 9.   A circuit board that electrically connects the first metal fitting and the first terminal of the electric motor, and further electrically connects the conductive member and the second terminal of the electric motor;
  The main body case further includes a board holding part that is provided between the upper coupling part and the battery holding part and holds the circuit board.
  The oral hygiene device according to claim 9 or 10.   The main body case includes an outer case and an inner case,
  The outer case includes the upper coupling portion;
  The inner case includes the battery holding portion and the device holding portion,
  The outer case and the inner case are coupled to each other and can rotate integrally with the gripping case.
  The oral hygiene device according to claim 11.   The outer case includes a lower coupling portion in addition to the upper coupling portion,
  The lower coupling portion is a portion that is provided in the gripping case and is coupled to the gripping case while being rotatable with respect to the gripping case.
  The oral hygiene device according to claim 12.   The oral hygiene device is an electric toothbrush;
  The main body case or the gripping case can be coupled and separated, and further includes a cap that covers the functional component by being coupled to the main body case or the gripping case.
  The oral hygiene device according to any one of claims 1 to 13.

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