Scalp Care Device

Abstract

To provide a scalp care device which can suppress occurrence of waterproof failure due to a seal member being forgotten to be mounted or due to mounting unevenness in a fastening part between an enclosure body and a component to be fastened.SOLUTION: A scalp care device includes: a body part having an enclosure 21; and an operation unit mounted on the body part. The enclosure 21 includes: an enclosure body 211 formed into a cylindrical shape; and a component 2122 to be fastened arranged so as to cover an opening of the enclosure body 211 and fastened. Also, the enclosure 21 includes a component 2141 to be compressed which is compressed between the enclosure body 211 and the component 2122 to be fastened and seals. The component 2141 to be compressed includes: a first seal part 2141a for sealing a gap between an inner surface of the enclosure body 211 and the component 2122 to be fastened; and a second seal part 2142 for sealing a fastening part between the enclosure body 211 and the component 2122 to be fastened.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present disclosure relates to a scalp care device. [Background technology]

[0002] Conventionally, as disclosed in Patent Document 1, a scalp care device is known that includes a device main body that houses a drive source, and a treatment head that has a treatment element that operates when driven by the drive source.

[0003] In Patent Document 1, an O-ring is provided at each fastening portion between the enclosure body and the fastened component, thereby forming a waterproof structure to prevent water from entering the enclosure body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2012-61174 A Summary of the Invention [Problem to be solved by the invention]

[0005] In such a scalp care device, it is necessary to attach sealing members to all fastening portions of the enclosure body, and waterproofing may be impaired due to forgetting to attach the sealing members or due to uneven attachment of the sealing members.

[0006] The present disclosure has been made in consideration of the problems of the conventional technology. An object of the present disclosure is to provide a scalp care device that can suppress the occurrence of waterproofing defects due to forgetting to attach a seal member or an uneven attachment at a fastening portion between an enclosure body and a fastening part. [Means for solving the problem]

[0007] A scalp care device according to an embodiment of the present disclosure includes a main body having an enclosure that houses a drive source and a power source, and a treatment unit that is replaceably attached to and detached from the main body. The enclosure includes a cylindrical enclosure body, a fastened part that is arranged to cover an opening of the enclosure body and fastened, and a compressed part that is compressed and sealed between the enclosure body and the fastened part. The compressed part has a first seal part that seals a gap between the inner surface of the enclosure body and the fastened part, and a second seal part that seals a fastening part between the enclosure body and the fastened part. The first seal part and the second seal part are integrally formed. Effect of the Invention

[0008] According to the present disclosure, a scalp care device is provided that can suppress the occurrence of waterproofing defects due to forgetting to attach a sealing member or variances in attachment at a fastening portion between an enclosure body and a fastened part. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view of a scalp care device in which a first treatment unit is attached to a main body portion, as viewed from one direction. [Diagram 2] 13 is a perspective view of the scalp care device with the first treatment unit attached to the main body, seen from another direction. FIG. [Diagram 3] 1 is a perspective view of a scalp care device in which a second treatment unit is attached to a main body portion, as viewed from one direction. [Figure 4] 13 is a perspective view of the scalp care device with the second treatment unit attached to the main body, seen from another direction. FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] Cross-sectional view taken along line AA in Figure 6. [Figure 8] FIG. 8 is an enlarged view of part B in FIG. 7. [Figure 9] FIG. 8 is an enlarged view of part C in FIG. 7. [Figure 10]Cross-sectional view taken along the line D-D in Figure 6. [Figure 11] FIG. 11 is an enlarged view of part E in FIG. [Figure 12] FIG. [Figure 13] FIG. 4 is a perspective view of an upper seal member formed integrally with the main body lid. [Figure 14] FIG. [Figure 15] FIG. 4 is a perspective view of a lower seal member formed integrally with the bottom plate. [Figure 16] FIG. 4 is a plan view of the main body portion to which the first treatment unit is attached. [Figure 17] FF cross-sectional view of Figure 16. [Figure 18] FIG. 18 is an enlarged view of part G in FIG. 17. [Figure 19] FIG. 18 is an enlarged view of part H in FIG. 17. [Figure 20] FIG. 4 is a side view showing a state in which the joint is removed from the joint gear. [Figure 21] A view of the joint in Figure 20 viewed from the I line direction. [Figure 22] FIG. 21 is a view of the coupling gear in FIG. 20 viewed in the direction of line J. [Diagram 23] FIG. 4 is a side view showing a state in which the output shaft of the main body side gear mechanism is removed from the joint. [Figure 24] A view of the joint in Figure 23 viewed from the K line direction. [Diagram 25] 13 is a cross-sectional view of the main body showing a modified example of the lower seal member. FIG. [Figure 26] FIG. 26 is an enlarged view of part L in FIG. 25. [Figure 27] 17 is an exploded cross-sectional view of the scalp care device, corresponding to cross section MM in FIG. 16. [Figure 28] FIG. 28 is an enlarged view of a portion of FIG. 27. [Figure 29] MM cross section of Figure 16. [Diagram 30] FIG. 30 is an enlarged view of a portion of FIG. 29 . [Diagram 31] FIG. 4 is a perspective view showing a movable contact and a fixed contact of the connection detection switch. [Diagram 32] FIG. 13 is a diagram showing a modified example of the detection mechanism. [Diagram 33] 13 is a table showing combinations of detection patterns of a detection mechanism according to a modified example. [Diagram 34] 13A and 13B are diagrams showing an example of a detection pattern of a detection mechanism according to a modified example. [Diagram 35] 13A and 13B are diagrams showing an example of a detection pattern of a detection mechanism according to a modified example. [Diagram 36] 13A and 13B are diagrams showing an example of a detection pattern of a detection mechanism according to a modified example. [Figure 37] 13A and 13B are diagrams showing an example of a detection pattern of a detection mechanism according to a modified example. [Figure 38] 13A and 13B are diagrams showing an example of a detection pattern of a detection mechanism according to a modified example. [Figure 39] 13A and 13B are diagrams showing an example of a detection pattern of a detection mechanism according to a modified example. [Diagram 40] FIG. 4 is a perspective view of the first treatment unit seen from one direction. [Diagram 41] FIG. 11 is a perspective view of the first treatment unit seen from another direction. [Diagram 42] FIG. 4 is an exploded view of the first treatment unit. [Diagram 43] FIG. 4 is a perspective view of the first attachment of the first treatment unit viewed from one direction. [Diagram 44] FIG. 11 is a perspective view of the first attachment of the first treatment unit as viewed from another direction. [Diagram 45] FIG. 4 is a perspective view of the second attachment of the first treatment unit viewed from one direction. [Diagram 46] NN cross section of Figure 45. [Figure 47] Plan view of the first treatment unit. [Figure 48] Cross-sectional view of FIG. 47 . [Figure 49] A cross-sectional view corresponding to cross section OO in Figure 47, showing a state in which a load within a predetermined range is applied to the treatment protrusion. [Figure 50] A cross-sectional view corresponding to cross section OO in Figure 47, showing a state in which a load equal to or greater than a predetermined value is applied to the treatment protrusion. [Figure 51] A cross-sectional view showing the rotating base removed from the treatment element base. [Figure 52]FIG. 11 is another cross-sectional view showing the state in which the rotating base is detached from the treatment element base. [Figure 53] FIG. 4 is a cross-sectional view showing the rotating base attached to the treatment element base. [Figure 54] FIG. 4 is a perspective view of the second treatment unit seen from one direction. [Figure 55] FIG. 11 is a perspective view of the second treatment unit seen from another direction. [Figure 56] FIG. 4 is an exploded view of the second treatment unit. [Figure 57] Plan view of the second treatment unit. [Figure 58] PP cross section of Figure 57. [Figure 59] QQ cross section of Figure 57. [Figure 60] A cross-sectional view corresponding to the PP cross section in Figure 57, showing a state in which a load greater than a predetermined value is applied to the treatment protrusion. [Figure 61] A cross-sectional view corresponding to the QQ cross section in Figure 57, showing a state in which a load greater than a predetermined value is applied to the treatment protrusion. [Figure 62] FIG. 4 is a perspective view showing a state in which the first treatment unit is placed on a first stand. [Figure 63] FIG. 4 is an exploded side view showing the first treatment unit and the first stand. [Figure 64] FIG. 11 is a perspective view showing a state in which the second treatment unit is placed on a second stand. [Figure 65] FIG. 4 is an exploded side view showing the second treatment unit and the second stand. [Figure 66] 13 is a side view showing a state in which a second stand having a second treatment unit placed thereon is placed, and a first stand having a first treatment unit placed thereon. FIG. [Figure 67] 13 is a side view showing a state in which a first stand having a first treatment unit placed thereon is placed, and a second stand having a second treatment unit placed thereon. FIG. [Figure 68] 13 is a perspective view showing a state in which a second stand having a second treatment unit placed thereon is placed, and a first stand having a first treatment unit connected to a main body portion placed thereon is placed on top of the second stand. FIG. [Figure 69] 69 is a perspective view of the scalp care device shown in FIG. 68 from another direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the embodiments will be described in detail with reference to the drawings. However, more detailed description than necessary may be omitted. For example, detailed description of already well-known matters or duplicate description of substantially the same configuration may be omitted.

[0011] It should be noted that the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0012] In the following description, the direction in which the treatment unit moves relative to the main body when the treatment unit is attached to or detached from the main body is defined as the up-down direction. In addition, the up and down directions are defined with the treatment unit positioned below the main body.

[0013] [Example of scalp care device] The scalp care device 10 according to this embodiment includes a main body 20 that houses an electric motor 235 as a drive source, and a plurality of treatment units that are detachably attached to the main body 20 in an exchangeable manner.

[0014] In this manner, in the scalp care device 10 according to the present embodiment, a plurality of treatment units can be attached to and detached from the main body 20 in an exchangeable manner.

[0015] In the present embodiment, as shown in Figs. 1 to 4, a first treatment unit 30 and a second treatment unit 40 are exemplified as a plurality of treatment units that can be replaceably attached to and detached from the main body portion 20.

[0016] That is, in this embodiment, the scalp care device 10 is provided with two types of treatment units, a first treatment unit 30 and a second treatment unit 40, and each treatment unit is adapted to be attached to and detached from a common main body 20.

[0017] By replacing the treatment unit attached to the main body 20, different scalp care effects can be obtained.

[0018] Furthermore, the scalp care device 10 includes a first stand 60 for placing the first treatment unit 30 thereon, and a second stand 70 for placing the second treatment unit 40 thereon (see Figs. 62 to 69).

[0019] [Example of main body] First, an example of the main body will be described with reference to FIGS. 5 to 24. FIG.

[0020] In this embodiment, the main body 20 includes an enclosure 21 that configures an outer shell, as shown in Fig. 5 to Fig. 19. This enclosure 21 is also called a housing, and can be formed, for example, using a synthetic resin material having insulating properties.

[0021] In this embodiment, the enclosure 21 is formed by joining a plurality of divided bodies, and a cavity is formed inside the enclosure 21 formed by joining the divided bodies. Various electric components are housed inside this cavity. Specifically, the cavity formed inside the enclosure 21 houses an electric motor 235, a storage battery (power source) 232 that supplies power to the electric motor 235, a control circuit 22 having a control unit that controls the on / off of the power source (on / off of the drive of the electric motor 235), and the like.

[0022] The enclosure 21 also includes a cylindrical wall portion (enclosure main body) 211 that is approximately cylindrical and penetrates in the vertical direction, an upper cover portion 212 that is arranged to cover an upper opening of the cylindrical wall portion 211, and a bottom plate 213 that is arranged to cover a lower opening of the cylindrical wall portion 211.

[0023] An approximately rectangular opening is formed at one end (lower end) of the cylindrical wall 211 where the treatment unit is attached. And, at the other end (upper end) of the cylindrical wall 211, an approximately rectangular opening having a smaller opening area than the opening formed at the one end (lower end).

[0024] Furthermore, the cylindrical wall portion 211 has a shape in which the diameter is reduced at a midpoint in the vertical direction compared to the openings formed at one end side (lower end side) and the other end side (upper end side). Specifically, the cylindrical wall portion 211 has a shape in which the diameter is gradually reduced from one end side toward the midpoint in the vertical direction, and also gradually reduced from the other end side toward the midpoint. In this embodiment, the reduced diameter portion of the cylindrical wall portion 211 is formed at a position closer to the opening formed at the other end side (upper end side).

[0025] In this way, by providing a reduced diameter portion in the vertical direction of the cylindrical wall portion 211, the user can grip the reduced diameter portion of the cylindrical wall portion 211 when using the scalp care device 10. That is, in this embodiment, the reduced diameter portion of the cylindrical wall portion 211 serves as the grip portion 20a of the main body portion 20.

[0026] An opening formed on the other end side (upper end side) of cylindrical wall portion 211 in the vertical direction is closed by upper lid portion 212. In this embodiment, upper lid portion 212 includes main body lid 2122 as a fastening part that seals the opening formed on the other end side (upper end side), and operation panel 2121 arranged on the upper side of main body lid 2122.

[0027] 12 is fixed to the enclosure 21 by a body lid fastening screw 214. With the body lid 2122 fixed to the enclosure 21, the gap between the inner surface of the cylindrical wall portion 211 and the body lid 2122 is sealed by an upper sealing member 2141 serving as a compressed part.

[0028] The upper seal member 2141 shown in FIG. 12 and FIG. 13 has a first seal portion 2141a that seals the gap between the inner surface of the cylindrical wall portion 211 and the main body lid 2122, and a second seal portion 2142 that seals a screw boss portion (fastening portion) formed in the main body lid 2122. The first seal portion 2141a and the second seal portion 2142 are integrally formed. That is, in this embodiment, the first seal portion 2141a and the second seal portion 2142 are connected by a connecting portion 2143 that extends radially inward from the inner edge of the first seal portion 2141a. This upper seal member 2141 can be made of a flexible member such as an elastomer. In this embodiment, the main body lid 2122 and the upper seal member 2141 are integrated by two-color molding.

[0029] The upper seal member 2141, in which the first seal portion 2141a and the second seal portion 2142 are integrally formed, is compressed in the vertical direction between the enclosure 21 and the main body lid 2122, thereby waterproofing the inside of the enclosure 21 of the main body portion 20 (see Figures 8 and 11).

[0030] In addition, the upper cover 212 is provided with an operation switch button 222 exposed upward for operating a push-type power switch (not shown) that switches the power supply on and off (turning the drive of the motor 235 on and off).

[0031] In this embodiment, the control circuit 22 is disposed below the main body lid 2122, and a power switch is placed on this control circuit 22. Specifically, a through hole 2122a penetrating in the vertical direction is formed in the main body lid 2122, and the power switch is mounted at a position overlapping with the through hole 2122a on the upper side of the control circuit 22. At this time, the gap between the power switch and the through hole 2122a is covered by an operation switch packing 221 formed integrally with the main body lid 2122. This prevents water from entering the inside through the through hole 2122a.

[0032] Also, a through hole 2121a that penetrates the operation panel 2121 in the vertical direction is formed, and an operation switch button 222 is inserted into this through hole 2121a. Note that, although a push-type power switch has been exemplified as the power switch in this embodiment, a slide type or other switch that can turn the power on and off may also be used.

[0033] Further, an electric motor 235 is electrically connected to the control circuit 22 via lead wires. In this embodiment, the electric motor 235 is built into the housing 21 while being held by a motor base 23 arranged below the control circuit 22. The motor base 23 is fixed to the enclosure 21 by a motor base fastening screw 231.

[0034] An electric motor 235 is supported on the upper part of the electric motor base 23, and a storage battery 232 is supported on the lower part of the electric motor base 23. As the storage battery 232, a lithium ion battery, a nickel metal hydride battery, or the like can be used.

[0035] Furthermore, in this embodiment, a connection detection switch 233 is attached to the motor base 23 as a detection means. This connection detection switch 233 detects the pressure of the push rod of the treatment unit, which will be described later, when all the attachments constituting the treatment unit are attached to the main body 20. The connection detection switch 233 detects the pressure of the push rod, so that the motor 235 can be driven. That is, in this embodiment, when the connection detection switch 233 does not detect the pressure of the push rod, the motor 235 is not driven even if the operation switch button 222 is operated.

[0036] Further, a power supply terminal 223 is attached to the cylindrical wall portion 211 so as to be exposed to the outside while being sealed by an O-ring 224, and a power supply cable or the like (not shown) can be inserted therein. That is, the storage battery 232 can be charged by inserting a power supply cable or the like into the power supply terminal 223. Note that the method of charging the storage battery 232 is not limited to the method of inserting a power supply cable or the like into the power supply terminal 223, and it is also possible to use, for example, a charging method using contactless power supply, a charging method using long-distance power transmission using a power transmission system, or the like.

[0037] In this embodiment, the electric motor 235 includes an electric motor body 2351 and an electric motor shaft 2352, and is held by the electric motor base 23 in a state in which the electric motor shaft 2352 protrudes downward from the electric motor body 2351. That is, the electric motor 235 is built into the cavity of the enclosure 21 in a state in which the direction of the rotation axis is substantially aligned with the up-down direction.

[0038] A joint 261 of the main body side drive transmission section 26 is connected to the electric motor shaft 2352 protruding downward via the main body side gear mechanism 24 .

[0039] The main body side gear mechanism 24 includes a pinion gear 241 attached to the electric motor shaft 2352. The pinion gear 241 is attached to the electric motor shaft 2352 so as to rotate together with the electric motor shaft 2352.

[0040] The main body side gear mechanism 24 also includes a first gear 242 that meshes with the pinion gear 241 and rotates about the vertical direction, and a first shaft 2421 on which the first gear 242 is attached and extends in the vertical direction.

[0041] Furthermore, the main body side gear mechanism 24 includes a second gear 243 that meshes with the first gear 242 and rotates about the vertical direction, and a second shaft 2431 that extends in the vertical direction and to which the second gear 243 is attached.

[0042] The main body side gear mechanism 24 also includes a third gear 244 that meshes with the second gear 243 and rotates about the vertical direction, and a third shaft 2441 that extends in the vertical direction and to which the third gear 244 is attached.

[0043] The main body side gear mechanism 24 also includes an output gear 245 that meshes with the third gear 244 and rotates about the vertical direction, and an output shaft 246 that extends in the vertical direction and to which the output gear 245 is attached. The output shaft 246 is held by a bearing 247.

[0044] A joint 261 of the main body side drive transmission section 26 is connected to the lower end of the output shaft 246. This main body side drive transmission section 26 transmits the drive (rotation) of the electric motor 235 to the treatment element of the treatment unit attached to the main body 20.

[0045] The joint 261 of the main body side drive transmission section 26 shown in Figs. 20 to 22 includes a regular hexagonal prism-shaped (polygonal prism-shaped) main body section (joint main body) 2611 and a flange section 2612 connected to the base end (upper end) of the main body section 2611. This main body section 2611 is inserted into a regular hexagonal (polygonal) insertion hole formed in the treatment unit side drive transmission section (first treatment unit side drive transmission section 352, second treatment unit side drive transmission section 452). By combining this hexagonal prism-shaped joint 261 with the hexagonal insertion hole, the drive (rotation) of the electric motor 235 is transmitted from the main body section 20 to the treatment unit attached to the main body section 20.

[0046] In this embodiment, the length L1 of the widest point on the tip surface 2611a of the body portion 2611 intersecting the axial direction of the joint 261 is shorter than the length L2 of the opposite side of the hexagonal insertion hole 3522.

[0047] In this embodiment, a diameter R1 of a circle circumscribing the tip surface 2611a of the main body portion 2611 is equal to or smaller than a diameter R2 of a circle circumscribing the hexagonal insertion hole 3522. Furthermore, in this embodiment, an R portion 2614 having a radius of curvature equal to or larger than the radius of the circle circumscribing the insertion hole 3522 is formed between the tip surface 2611a and the outer surface 2613 of the main body portion 2611.

[0048] 23, an output shaft 246 having a shaft side flat surface (shaft side D-cut surface) 2461 at its tip end (lower end) is press-fitted into the joint 261. Furthermore, as shown in Fig. 24, an air vent portion (groove portion) 2615a is formed in the center of the inner flat surface (inner D-cut surface) 2615 of the joint 261 to bleed air when the output shaft 246 is press-fitted. This air vent portion 2615a functions as an air vent hole when the output shaft 246 is press-fitted into the joint 261, making it easier to press-fit the output shaft 246.

[0049] Furthermore, the joint 261 has a flange portion 2616 at the upper end, and this joint 261 is covered with a joint presser plate 27, which is a separate component. The flange portion 2616 of the joint 261 is pressed from below by the joint presser plate 27, so that the transmission of the driving force of the electric motor 235 is not hindered, the joint 261 is prevented from falling off, and the joint 261 is held relative to the enclosure 21.

[0050] By adopting the above-mentioned configuration, the drive is transmitted to the treatment unit attached to the main body 20 at a rotation speed lower than that of the electric motor 235. The joint 261 of the main body side drive transmission part 26 has a regular hexagonal shape (polygonal shape) when viewed from the back side of the main body 20 (when the main body 20 is viewed from the lower side in the vertical direction, which is the attachment / detachment direction of the main body 20 and the treatment unit). This allows the treatment unit side drive transmission part described later to be attached to the main body side drive transmission part 26 in a state in which free rotation is suppressed. The main body side drive transmission part 26 and the treatment unit side drive transmission part are not limited to a polygonal shape as long as they are attached in a state in which free rotation is suppressed. For example, a D-cut structure is possible, and free rotation may be suppressed by using a means for increasing the friction force between the main body side drive transmission part 26 and the treatment unit side drive transmission part.

[0051] In this embodiment, an opening formed on one end side (lower end side) of the cylindrical wall portion 211 is closed by a bottom plate 213 serving as a fastened part. The bottom plate 213 is fixed to the enclosure 21 by a bottom plate fastening screw 215.

[0052] In this embodiment, the bottom plate 213 is plate-shaped, and the flat lower surface of the bottom plate 213 extending in the horizontal direction is the end surface on the side to which the treatment unit is attached.

[0053] In addition, a battery accommodating recess 2131 is formed on the upper side of the bottom plate 213, and when the bottom plate 213 is fixed to the enclosure 21, the lower part of the battery 232 is accommodated within the battery accommodating recess 2131.

[0054] A hook housing section 2132 that protrudes downward and opens in the radially outward direction is formed on the lower side of the bottom plate 213, and a hook 28 that engages with an engagement section of the treatment unit (described later) is housed in this hook housing section 2132. This hook 28 is housed in the hook housing section 2132 in a state where it is biased in the radially outward direction by a biasing spring 281.

[0055] Further, an output shaft insertion hole 2134 is formed in the bottom plate 213, through which the output shaft 246 is inserted, penetrating in the vertical direction. The output shaft packing 25 seals a gap formed between the outer surface of the output shaft 246 and the inner surface of the output shaft insertion hole 2134 when the output shaft 246 is inserted. The output shaft packing 25 is pressed by the joint presser plate 27, thereby sealing the gap formed between the outer surface of the output shaft 246 and the inner surface of the output shaft insertion hole 2134.

[0056] The joint presser plate 27 is fixed to the bottom plate 213 by joint presser plate fastening screws 216. Specifically, a joint presser plate accommodating recess is formed on the underside of the bottom plate 213, and the joint presser plate 27 is fixed to the bottom plate 213 by the joint presser plate fastening screws 216 while being accommodated in the joint presser plate accommodating recess.

[0057] Furthermore, a through hole penetrating the bottom plate 213 in the up-down direction is formed, and a rubber switch button 234 (see FIG. 27) is attached to this through hole.

[0058] 14 is fixed to the enclosure 21 by a bottom plate fastening screw 215. With the bottom plate 213 fixed to the enclosure 21, the gap between the inner surface of the cylindrical wall portion 211 and the bottom plate 213 is sealed by a lower sealing member 217 serving as a compressed part.

[0059] The lower seal member 217 shown in FIG. 14 and FIG. 15 has a first seal portion 2171 that seals the gap between the inner surface of the cylindrical wall portion 211 and the bottom plate 213, and a second seal portion 2172 that seals a screw boss portion (fastening portion) formed on the bottom plate 213. The first seal portion 2171 and the second seal portion 2172 are integrally formed. That is, in this embodiment, the first seal portion 2171 and the second seal portion 2172 are connected by a connecting portion 2173 that extends radially inward from the inner edge of the first seal portion 2171. The lower seal member 217 can be made of a flexible member such as an elastomer. In this embodiment, the bottom plate 213 and the lower seal member 217 are integrated by two-color molding.

[0060] The lower seal member 217, in which the first seal portion 2171 and the second seal portion 2172 are integrally formed, is compressed in the vertical direction between the enclosure 21 and the bottom plate 213, thereby waterproofing the inside of the enclosure 21 of the main body portion 20 (see Figure 9).

[0061] As described above, in this embodiment, the main body 20 has a waterproof structure, and water is prevented from entering the cavity within the enclosure 21.

[0062] 9 and 18, in this embodiment, an annular main body side seal member 218 is disposed at the treatment unit side end (lower end) of the enclosure 21 (cylindrical wall portion 211). This main body side seal member 218 can be made of a flexible material such as elastomer.

[0063] The main body side seal member 218 formed at the end of the enclosure 21 on the treatment unit side is compressed in the vertical direction between the enclosure 21 and the treatment unit, thereby waterproofing the inside of the connecting portion between the main body 20 and the treatment unit (see Figure 19).

[0064] As described above, in this embodiment, the connecting portion between the main body 20 and the treatment unit has a waterproof structure, so that the intrusion of water into the inside is suppressed.

[0065] In addition, in a waterproof structure that waterproofs the gap between the enclosure 21 and the bottom plate 213, the lower seal member 217A (see FIGS. 25 and 26) may have both a function as a waterproof valve and a function as a relief valve (safety valve). That is, the function as the preventive valve described above is a function to prevent water from entering the enclosure 21, and the function as the relief valve described above is a function to discharge gas generated in the enclosure 21 to the outside.

[0066] The lower seal member 217A has a tongue portion 2174 extending radially outward, and the tongue portion 2174 is compressed radially between the enclosure 21 and the bottom plate 213. In this manner, the main body 20 can have a structure that is resistant to external pressure and that allows gas or the like to escape easily when gas is generated inside.

[0067] An example of a detection mechanism included in the scalp care device will be described below with reference to Figs.

[0068] Here, the operation of the detection mechanism 29 will be described using the example of mounting the first treatment unit 30 to the main body 20. The operation of the detection mechanism 29 when the second treatment unit 40 is mounted to the main body 20 is similar to that when the first treatment unit 30 is mounted to the main body 20, so the description will be omitted.

[0069] The detection mechanism 29 has a switch button 234 arranged on the main body 20, a push rod 341 arranged on the first attachment 31 described later, and a detectable protrusion 343 arranged on the second attachment 32 described later.

[0070] As shown in FIGS. 27 and 28, when the first attachment 31 is not attached to the main body portion 20, the push rod 341 is pressed downward by the biasing spring (coil spring) 342.

[0071] In this state, even if only the first attachment 31 is connected to the main body 20, the switch button 234 does not move, and the movable side contact 2331 of the connection detection switch 233 does not move either.

[0072] 29 and 30, when both the first attachment 31 and the second attachment 32 are connected to the main body 20, the detectable protrusion 343 arranged on the second attachment 32 pushes up the push rod 341 arranged on the first attachment 31. This causes the tip (upper end) of the push rod 341 to be exposed from the upper surface of the first attachment 31, and the tip of the push rod 341 pushes up the switch button 234 arranged on the main body 20.

[0073] The tip (upper end) of the pushed-up switch button 234 pushes the movable contact 2331 upward, and the movable contact 2331 comes into contact with the fixed contact 2332, turning the connection detection switch 233 on.

[0074] For example, an electric signal from the connection detection switch 233 is transmitted to a control unit, and this control signal controls the driving of the electric motor 235. Alternatively, the contacts (movable side contact 2331, fixed side contact 2332) of the connection detection switch 233 may be provided in an electric circuit, and power may be supplied to the electric motor 235 directly via these contacts.

[0075] FIG. 31 shows an example of an electric circuit switch having a movable contact 2331 and a fixed contact 2332. In FIG.

[0076] The movable contact 2331 has a movable contact surface 2331a having a substantially semi-cylindrical shape with an axis C1 extending in a direction perpendicular to the movable direction of the movable contact 2331. On the other hand, the fixed contact 2332 has a fixed contact surface 2332a having a substantially semi-cylindrical shape with an axis C2 extending in a direction perpendicular to the axis C1 of the movable contact surface 2331a.

[0077] In this embodiment, the semi-cylindrical movable contact surface 2331a is divided into two, and the divided movable contact surfaces 2331a are arranged side by side along the axis C3. The semi-cylindrical fixed contact surface 2332a is also formed into two, and the formed fixed contact surfaces 2332a are arranged side by side along the axis C1 of the movable contact surface 2331a.

[0078] By configuring the movable contact 2331 and the fixed contact 2332 in this way, even if a foreign object gets between the contacts, the foreign object is likely to fall along the semi-cylindrical movable contact surface 2331a or the semi-cylindrical fixed contact surface 2332a. Also, by dividing the contact surface of the contact into two, even if a foreign object gets between one of the contact surfaces, it is possible to ensure conduction between the movable contact 2331 and the fixed contact 2332 between the other contact surface.

[0079] By configuring the detection mechanism 29 in this manner, it is possible for the single detection mechanism 29 to detect that all of the attachments (first attachment, second attachment) that configure the treatment unit are connected.

[0080] Next, modified examples of the detection mechanism will be described with reference to FIGS.

[0081] As shown in Fig. 32, the detection mechanism according to the modified example has a plurality of connection detection switches (sw1-sw4) arranged on the main body. At least one push rod (a1-a4) is arranged on the first attachment, and at least one detectable protrusion (b1-b4) is arranged on the second attachment. By configuring the detection mechanism in this way, it is possible to obtain a detection mechanism that also has the function of recognizing at least one of the type of treatment unit and the combination of attachments based on the on / off combination of the plurality of connection detection switches (sw1-sw4).

[0082] In the illustrated example, the detection mechanism has four connection detection switches (sw1 to sw4). In this case, as shown in the table in FIG. 33, a maximum of 15 combinations of treatment unit types or attachments can be detected by the combination of connection detection switches that are turned on.

[0083] In the table in Fig. 33, "0" indicates that the "connection detection switch is OFF," and "1" indicates that the "connection detection switch is ON." If any of the attachments is disconnected, the detection pattern in the table in Fig. 33 is "0," and in the case of the combination of the push rod and detectable protrusion shown in Fig. 32, the detection pattern in the table in Fig. 33 is "15."

[0084] 34 to 36 show an example in which there are multiple types of first attachments, and each first attachment is combined with three types of second attachments. In the case of the combination of the push rod and detectable protrusion shown in FIG. 34, the detection pattern is "11" in the table in FIG. 33. In addition, in the case of the combination of the push rod and detectable protrusion shown in FIG. 35, the detection pattern is "8" in the table in FIG. 33. Furthermore, in the case of the combination of the push rod and detectable protrusion shown in FIG. 36, the detection pattern is "3" in the table in FIG. 33.

[0085] 37 to 39 show an example in which there are multiple types of second attachments, and each second attachment is combined with three types of first attachments. In the case of the combination of the push rod and detectable protrusion shown in FIG. 37, the detection pattern is "11" in the table in FIG. 33. In addition, in the case of the combination of the push rod and detectable protrusion shown in FIG. 38, the detection pattern is "8" in the table in FIG. 33. Furthermore, in the case of the combination of the push rod and detectable protrusion shown in FIG. 39, the detection pattern is "3" in the table in FIG. 33.

[0086] [An example of the first treatment unit] Next, an example of the first treatment unit will be described with reference to Figs. 40 to 46.

[0087] The first treatment unit 30 comprises a first attachment 31 as a head portion whose one end side (upper end side) is connected to the main body portion 20, and a second attachment 32 as a first treatment portion (treatment section) connected to the other end side (lower end side) of the first attachment 31.

[0088] The first attachment 31 includes a first case 310 that forms the outer shell of the first attachment 31. This first case 310 is also called a head housing, and can be formed using, for example, a synthetic resin material.

[0089] The first case 310 is formed by joining a plurality of divided bodies, and a cavity is formed inside the first case 310 formed by joining the divided bodies. The first treatment unit side gear mechanism 35 described later is housed inside this cavity.

[0090] Specifically, first case 310 has a substantially rectangular shape when viewed from the back, and includes attachment case 311 that opens downward, and attachment base 312 that is disposed so as to cover the opening of attachment case 311. Attachment base 312 is fixed to attachment case 311 by attachment base fastening screws 3121.

[0091] The attachment case 311 includes a peripheral wall 3111 and a top wall 3112 connected to the upper end of the peripheral wall 3111. The peripheral wall 3111 has a shape that gradually expands in diameter from the upper end side, which is the side attached to the main body part 20, toward the lower end side. The top wall 3112 is plate-shaped, and a flat top surface 3112a extending horizontally of the top wall 3112 is the end surface on the side attached to the main body part 20. The top surface 3112a is configured to be substantially flush with the lower surface (the end surface of the main body part on the side on which the treatment unit is attached) when the first treatment unit 30 is attached to the main body part 20.

[0092] This makes it easy to design the shapes of the main body 20 and the first treatment unit 30 so that when the first treatment unit 30 is attached to the main body 20, there is a smooth connection at the joint.

[0093] In addition, in this embodiment, the joint between the main body 20 and the treatment unit is made to have a flat surface. This allows the joint to be smoothly connected, while making it easier to make the shapes of other parts various shapes. In other words, it is possible to improve the design of the scalp care device 10, which is configured to be able to replace multiple treatment units, while improving the design freedom of the main body 20 and the treatment unit.

[0094] Furthermore, by making the joint portion between the main body 20 and the first treatment unit 30 flat, the internal space can be easily sealed using a sealing member such as an O-ring and a packing. In this embodiment, the main body 20 has a waterproof structure. In this way, for example, during bathing, the scalp care device 10 formed by attaching the first treatment unit 30 to the main body 20 can be used to perform care such as washing the hair (scalp cleaning) and massaging the scalp (scalp care).

[0095] Further, a through hole 3112b penetrating in the vertical direction is formed in the top wall 3112, and the first treatment unit side drive transmission part 352 is inserted into this through hole 3112b. The first treatment unit side drive transmission part 352 is formed so that a regular hexagonal (polygonal) space opens upward in a plan view of the first treatment unit 30 (a state in which the first attachment 31 is viewed from above in the vertical direction). This regular hexagonal (polygonal) space is formed so as to have approximately the same size as the outer diameter of the joint 261 of the main body side drive transmission part 26. Then, when the first treatment unit 30 is attached to the main body part 20, the joint 261 of the main body side drive transmission part 26 is inserted into this regular hexagonal (polygonal) space.

[0096] Further, the top wall 3112 is formed with a hook insertion recess 3112c into which the hook accommodating portion 2132 and the hook 28 of the main body 20 are inserted when the first treatment unit 30 is attached to the main body 20. An engagement portion 3112d that engages with the hook 28 when the first treatment unit 30 is attached to the main body 20 is formed in the hook insertion recess 3112c.

[0097] 43 (top wall 3112) is formed with a cleaning water inlet (water supply / drain port) 311h. Therefore, when the connection between the main body 20 and the first attachment 31 is released, the inside of the first attachment 31 can be cleaned through the cleaning water inlet 311h.

[0098] On the other hand, a cleaning drain port (water supply / drain port) 312h is formed in the attachment base 312 shown in Fig. 44. Therefore, when the first attachment 31 and the second attachment 32 are disconnected, the inside of the first attachment 31 can be cleaned through the cleaning drain port 312h.

[0099] Furthermore, the top wall 3112 is also formed with a through hole 3112e penetrating in the vertical direction, and a push rod 341 is inserted into this through hole 3112e while being biased downward by a biasing spring 342. When the first treatment unit 30 is attached to the main body 20, the push rod 341 presses the rubber switch button 234 upward. In this way, the connection detection switch 233 detects the pressure by the push rod 341 (that the first treatment unit 30 is attached to the main body 20), and the electric motor 235 can be driven by operating the operation switch button 222. By increasing the spring property (biasing force) of the rubber switch button 234, it is also possible to omit the biasing spring 342.

[0100] Furthermore, when the push rod 341 releases the connection detection switch 233 from being pressed down for some reason while the motor 235 is being driven (when the first treatment unit 30 is removed from the main body 20), the motor 235 stops.

[0101] The first treatment unit gear mechanism 35 is arranged in the space inside the attachment case 311 that opens downward.

[0102] The first treatment unit side gear mechanism 35 includes a joint gear 351 that rotates around the vertical direction, and a joint shaft 3511 to which the joint gear 351 is attached while extending in the vertical direction. In this embodiment, a first treatment unit side drive transmission part 352 is formed at the upper end of the joint gear 351, and a gear part 3521 is formed at the lower end of the joint gear 351. The first treatment unit side drive transmission part 352 and the gear part 3521 are formed integrally.

[0103] The first treatment unit gear mechanism 35 also includes a drive transmission gear 353 that meshes with the gear portion 3521 and rotates about the vertical direction, and a drive transmission shaft 3531 that extends in the vertical direction and to which the drive transmission gear 353 is attached.

[0104] The first treatment unit gear mechanism 35 also includes four output gears 354 that rotate around the vertical direction. In this embodiment, of the four output gears 354, two output gears 354 closer to the joint gear 351 mesh with the gear portion 3521, and two output gears 354 arranged at positions farther from the joint gear 351 mesh with the drive transmission gear 353. Each of the four output gears 354 is supported by an output gear bearing 3541.

[0105] Further, a rotary base 355 is fixed to each of the four output gears 354. The rotary base 355 includes an output shaft 3551 protruding upward from the center of the disk portion, and an eccentric shaft 3552 protruding downward at a position eccentric from the center of the disk portion. The output shaft 3551 is inserted into a through hole formed in the center of the output gear bearing 3541 and the output gear 354, and is fixed by a rotary base fastening screw 3553. In this manner, the output gear 354 and the rotary base 355 are attached with the output gear bearing 3541 interposed between them.

[0106] In this embodiment, the attachment base 312 is interposed between the output gear bearing 3541 and the output gear 354. Four through holes 312a are formed in the attachment base 312, so that the rotating base 355 attached to the output gear 354 is exposed below the attachment base 312 in a rotatable state.

[0107] If such a first treatment unit side gear mechanism 35 is provided, the four rotary bases 355 will operate as follows.

[0108] First, when the joint gear 351 rotates in one direction (for example, clockwise), the drive transmission gear 353 and the two output gears 354 closer to the joint gear 351 rotate in the reverse direction (counterclockwise). That is, the two rotating bases 355 closer to the joint gear 351 also rotate in the reverse direction (counterclockwise).

[0109] On the other hand, the two output gears 354 disposed at positions far from the joint gear 351, ie, the two rotary bases 355 disposed at positions far from the joint gear 351, rotate in the above-mentioned one rotation direction (clockwise).

[0110] At this time, the rotating base 355 rotates around the output shaft 3551. Therefore, the eccentric shaft 3552 provided on the rotating base 355 also rotates on a circumference centered on the output shaft 3551. In other words, the eccentric shaft 3552 performs a rotational motion along a plane (horizontal plane) perpendicular to the axial direction (up-down direction) of the output shaft 3551.

[0111] The second attachment 32 is detachably mounted on the first attachment 31 having such a configuration.

[0112] The second attachment 32 includes a second case 322 that is detachably mounted to the first attachment 31 , and a rubber cover 321 that is attached to the second case 322 .

[0113] The rubber cover 321 can be made of a flexible material such as elastomer, and is set to have substantially the same shape and size as the first attachment 31.

[0114] This rubber cover 321 is compressed in the vertical direction between the first attachment 31 and the second attachment 32, thereby waterproofing the inside of the connecting portion between the first attachment 31 and the second attachment 32 (see FIGS. 17 and 19).

[0115] As described above, in the present embodiment, the connecting portion between the first attachment 31 and the second attachment 32 has a waterproof structure, so that the intrusion of water into the inside is suppressed.

[0116] Further, to this rubber cover 321, a second case 322 made of a material harder than rubber cover 321 made of a flexible member is attached.

[0117] Specifically, mounting protrusions 3222 protruding upward are provided at approximately the center of each side of second case 322. Then, the mounting protrusions 3222 are fitted into mounting holes 3212 provided to penetrate vertically at approximately the center of each side of the outer circumferential edge of rubber cover 321, thereby allowing rubber cover 321 to be attached to second case 322. At this time, protrusions 3211 formed in the center of rubber cover 321 and protruding upward are inserted and fitted into engagement hooks 3221 formed in the center of second case 322 and protruding downward (see FIG. 46).

[0118] In this way, the second case 322 made of a harder material than the rubber cover 321 is attached to the flexible rubber cover 321, so that the second attachment 32 can be easily attached to and detached from the first attachment 31. In addition, the portion of the rubber cover 321 to which the second case 322 is not attached is the conforming deformation portion 3213, and the massage element base 323 is fitted into the conforming deformation portion 3213. In this embodiment, four circular holes 3223 are formed at positions symmetrical with respect to the center of the second case 322, and the portions of the rubber cover 321 corresponding to the four circular holes 3223 are the conforming deformation portion 3213. That is, in this embodiment, the rubber cover 321 is formed with four circular conforming deformation portions 3213.

[0119] 45 and 46, a water supply / drainage port 322h is formed. Therefore, the inside of the second attachment 32 can be washed through the water supply / drainage port 322h when the first attachment 31 and the second attachment 32 are disconnected. In this embodiment, a circular hole 3223 formed in the second case 322 also serves as the water supply / drainage port 322h.

[0120] The massage element base 323 is made of a resin or the like having higher rigidity than the rubber cover 321, and is a member that is difficult to deform. The massage element base 323 includes a base portion 3231 attached to the eccentric shaft 3552 of the rotating base 355, a core portion 3232 provided so as to protrude downward from the lower surface of the base portion 3231, and a flange portion 372 connected to the outer edge of the base portion 3231. In this embodiment, four core portions 3232 are provided in each massage element base 323.

[0121] An insertion hole 3231a is formed on the upper surface of the base portion 3231, and the eccentric shaft 3552 of the rotating base 355 is inserted into this insertion hole 3231a, so that the massage element base 323 is attached to the rotating base 355. In this way, the following deformation portion 3213 is deformed following the movement of the massage element base 323.

[0122] As described above, in this embodiment, the eccentric shaft 3552 rotates on a circle centered on the output shaft 3551. That is, the eccentric shaft 3552 performs rotational motion along a plane (horizontal plane) perpendicular to the axial direction (up-down direction) of the output shaft 3551.

[0123] Therefore, when the eccentric shafts 3552 rotate, the first massage elements (massage elements) 33 attached to the respective eccentric shafts 3552 also rotate on a circumference centered on the output shaft 3551 in accordance with the rotation of the eccentric shafts 3552.

[0124] In this manner, in this embodiment, each of the first massagers 33 performs a rotational motion (circular motion) along a plane (horizontal plane) perpendicular to the axial direction (up-down direction) of the output shaft 3551. Therefore, the shape of the trajectory drawn when the first massager 33 is operated becomes a circumference centered on the output shaft 3551. In this embodiment, the first massager 33 rotates while moving in parallel along the horizontal plane.

[0125] Here, in this embodiment, the four rotating bases 355 are arranged so that the eccentric shafts 3552 provided on the rotating bases 355 adjacent to each other at close positions (non-diagonal positions) rotate with a phase shift of 180 degrees. In this way, the eccentric shafts 3552 provided on the rotating bases 355 adjacent to each other at close positions (non-diagonal positions) rotate while approaching and moving away from each other. Therefore, the first massagers 33 attached to each eccentric shaft 3552 also rotate while approaching and moving away from the adjacent first massagers 33.

[0126] Furthermore, in this embodiment, the first massagers 33 are arranged so that there are two first massagers 33 that move in circles so as to pass each other when approaching each other, and two first massagers 33 that move in circles so as to move in the same direction when approaching each other. This allows the scalp to be massaged by pinching or twisting when the first massagers 33 are brought into contact with the scalp.

[0127] This configuration simplifies the configuration of the first treatment unit side gear mechanism 35 that transmits the drive of the electric motor (drive source) 235 to the multiple (four) first treatment elements 33. This allows the first treatment unit 30 to be made smaller.

[0128] Furthermore, in this embodiment, the first massage element 33 is formed by fitting the massage element base 323 into the following deformation portion 3213 of the rubber cover 321. That is, in this embodiment, the first massage element 33 is formed by assembling the rubber cover 321, which is a member separate from the massage element base 323 and has a relatively low rigidity, to the massage element base 323, which is a member with a relatively high rigidity.

[0129] The first massage element 33 includes a base 331 and a massage projection 332 that projects downward from a top surface (lower surface) 331a of the base 331 and is brought into contact with the scalp when the scalp care device 10 is in use.

[0130] The base 331 is formed by covering the base 3231 of the treatment element base 323 with the rubber cover 321. The treatment projection 332 is formed by covering the core 3232 of the treatment element base 323 with the rubber cover 321, and the part of the rubber cover 321 that covers the core 3232 is the elastic part 32131. Thus, in this embodiment, the treatment projection 332 has the core 3232 and the elastic part 32131 that covers the core 3232. The core 3232 and the elastic part 32131 are formed of separate members.

[0131] In this embodiment, each of the four first massage elements 33 is provided with four massage protrusions 332, and each of the massage protrusions 332 has a tip end 3322 provided with three small extending protrusions 33222.

[0132] Next, an example of a method of using the first treatment unit 30 having such a configuration will be described.

[0133] First, the first treatment unit 30 is mounted on the main body 20, and the first treatment unit side drive transmission part 352 is attached to the main body side drive transmission part 26. Then, in this state, the operation switch button 222 is pressed to drive the electric motor 235, thereby rotating the main body side drive transmission part 26.

[0134] In this way, the rotation of the main body side drive transmission section 26 is transmitted to the first treatment unit side drive transmission section 352, and the first treatment unit side drive transmission section 352 rotates together with the main body side drive transmission section 26. At this time, the gear section 3521 of the joint gear 351 attached to the first treatment unit side drive transmission section 352 and the drive transmission gear 353 also rotate together with the first treatment unit side drive transmission section 352.

[0135] As the gear portion 3521 and the drive transmission gear 353 rotate, the four output gears 354 rotate at a reduced speed.

[0136] In this manner, when the four output gears 354 rotate, the four rotary bases 355 respectively connected to the four output gears 354 also rotate.

[0137] At this time, the eccentric shafts 3552 provided on the respective rotary bases 355 perform rotational motion along a plane (horizontal plane) perpendicular to the axial direction (up-down direction) of the output shafts 3551.

[0138] Therefore, when the eccentric shaft 3552 rotates, the first massagers 33 attached to the eccentric shafts 3552 also rotate around the output shaft 3551. The massage protrusions 332 provided on the first massagers 33 also rotate following the rotation of the first massagers 33. At this time, the massage protrusions 332 rotate while moving in parallel along the horizontal plane.

[0139] In this state, if the treatment protrusions 332 are brought into contact with the scalp, the rotating treatment protrusions 332 can perform care such as washing and massaging the scalp (scalp care).

[0140] Hereinafter, an example of the operation of disconnecting the attachment in the first treatment unit will be described with reference to Figs.

[0141] FIG. 48 shows the no-load state. The rotating base 355, which is a connecting part, is fixed to the output gear 354 and rotates around the rotation axis RC. The treatment element base 323, which is a connected part, is attached so as to be inserted into the eccentric shaft 3552 of the rotating base 355, which is arranged eccentrically with respect to the rotation axis RC. At this time, the gaps G1 and G2 between the flange portion 372 of the treatment element base 323 and the frame (attachment base 312) of the first attachment 31 are sufficiently secured. Similarly, the gaps G3 and G4 between the flange portion 372 of the treatment element base 323 and the frame (second case 322) of the second attachment 32 are also sufficiently secured.

[0142] FIG. 49 shows a state when an appropriate load within a predetermined range is applied in the direction of the arrow A1 during treatment using the scalp care device 10. When an appropriate load within a predetermined range is applied to the treatment projection 332 via the tip 3322 in the direction of the arrow A1, the treatment element base 323 tilts with the tip of the eccentric shaft 3552 as a fulcrum. The connection between the treatment element base 323 and the rotating base 355 comes into contact at point B1 shown in FIG. 49, and the rotating base 355 does not tilt any further. At this time, the flange portion 372 of the treatment element base 323 and the frame (attachment base 312) of the first attachment 31 do not interfere (contact). Similarly, the flange portion 372 of the treatment element base 323 and the frame (second case 322) of the second attachment 32 do not interfere (contact).

[0143] FIG. 50 shows a state when a load of a predetermined value or more is applied to the treatment element base 323, such as when the treatment projection 332 comes into contact with a foreign object. The first attachment 31 and the second attachment 32 are engaged with at least one pair of engagement parts (hooks, hook insertion recesses). When a load of a predetermined value or more is applied to the treatment element base 323, the rotating base 355 slides at the tip of the eccentric shaft 3552 with the point B1 shown in FIG. 49 as the base point, and further tilts from the state shown in FIG. 49. At this time, the flange part 372 of the rotating base 355 raises the frame (second case 322) of the second attachment 32 at the point B2 shown in FIG. 50, and the engagement between the first attachment 31 and the second attachment 32 is released.

[0144] Here, as shown in FIG. 51 to FIG. 53, in this embodiment, the eccentric shaft 3552 of the rotating base 355, which is a connecting part, is formed as a convex part having a convex cone surface (convex tapered surface) 35521. On the other hand, the insertion hole 3231a of the treatment element base 323, which is a connected part, is formed as a hole having a concave cone surface (concave tapered surface) 32311. By forming the eccentric shaft 3552 and the insertion hole 3231a in a cone shape, when a load of a predetermined value or more is applied to the treatment element base 323, the treatment element base 323 slides along the convex cone surface 35521 of the eccentric shaft 3552. Therefore, when a load of a predetermined value or more is applied to the treatment element base 323, the treatment element base 323, which is a connected part, can be removed from the rotating base 355, which is a connecting part.

[0145] As shown in FIG. 53, the eccentric shaft 3552 of the rotating base 355 is disposed eccentrically with respect to the rotation axis RC. On the other hand, the base part 3231 of the massager base 323 is inserted into the following deformation part 3213 formed in the rubber cover 321 having the massage protrusion 332, and is disposed at a substantially central position of the rotation axis RC when the first attachment 31 and the second attachment 32 are released from connection. After the first attachment 31 and the second attachment 32 are connected, the massager base 323 moves along the eccentric shaft 3552 of the rotating base 355 due to the bending deformation of the rubber cover 321. Therefore, by forming the eccentric shaft 3552 and the insertion hole 3231a into a substantially conical shape as described above, the insertion hole 3231a can play a role of guiding when the eccentric shaft 3552 is inserted into the insertion hole 3231a.

[0146] 52, in this embodiment, the taper angle θ1 of the convex conical surface 35521 of the eccentric shaft 3552 is acuter (smaller) than the taper angle θ2 of the concave conical surface 32311 of the insertion hole 3231a. If the taper angle θ1 of the convex conical surface 35521 is acuter (larger) than the taper angle θ2 of the concave conical surface 32311 of the insertion hole 3231a, the eccentric shaft 3552 and the insertion hole 3231a will be pressed in, and there is a possibility that an appropriate insertion state will not be obtained.

[0147] Further, a convex hemispherical surface 35522 having a substantially hemispherical shape is formed at the tip end (lower end) of the eccentric shaft 3552, and a convex cylindrical surface 35523 having a substantially cylindrical shape is formed at the base end (upper end). On the other hand, a concave hemispherical surface 32312 having a substantially hemispherical shape is formed at the bottom (lower end) of the insertion hole 3231a, and a concave cylindrical surface 32313 having a substantially cylindrical shape is formed at the opening end (upper end). The radius of the convex hemispherical surface 35522 of the eccentric shaft 3552 is smaller than the radius of the concave hemispherical surface 32312 of the insertion hole 3231a.

[0148] When the treatment element base 323, which is the connected part, is tilted relative to the rotating base 355, which is the connecting part, the eccentric shaft 3552 of the rotating base 355 comes into contact with the insertion hole 3231a at two points, the point B3 on the tip side and the point B4 on the base end side (see FIG. 53). That is, when a load in a direction approximately perpendicular to the rotation axis RC acts on the treatment element base 323 and the treatment element base 323 is tilted relative to the rotating base 355, the load is received by the convex side hemispherical surface 35522 and the convex side cylindrical surface 35523 of the eccentric shaft 3552. When the treatment element base 323 is tilted relative to the rotating base 355, the eccentric shaft 3552 comes into contact with the insertion hole 3231a at two points, the point B3 on the tip side and the point B4 on the base end side, thereby maintaining smooth rotation.

[0149] In this embodiment, the rotating base 355, which is a connecting part, is configured so that the connecting portion (output shaft 3551) with the rotating shaft RC (rotating base fastening screw 3553) is not exposed to the outside (see FIG. 51). In addition, the portion of the rotating base 355 exposed to the outside (external exposed portion) is configured as one part, and this external exposed portion does not have any unevenness or the like that may catch and entangle a part of the user's hair or clothes. Furthermore, no gap is formed around the rotating base 355 that may pinch the user's fingers or the like. That is, in this embodiment, the gap between the rotating base 355 and the through hole 312a of the attachment base 312 is a minute gap, and it is possible to prevent a part of the user's hair or clothes from being drawn in through the gap.

[0150] Furthermore, in this embodiment, the rotating base 355, which is a connecting part, is formed using a relatively soft material such as a synthetic resin material. In particular, the rotating base 355, which is a connecting part, is formed using a material softer than metal. By forming the rotating base 355 using a synthetic resin material or the like in this way, it is possible to prevent damage to the scalp when the scalp care device 10 is brought into contact with the scalp in a state in which the second attachment 32 at the end having the treatment part is detached. In addition, in this embodiment, the tip (lower end) of the eccentric shaft 3552 of the rotating base 355 is made into an approximately spherical shape. By doing so, it is possible to more reliably suppress damage to the scalp caused by the tip of the eccentric shaft 3552 of the rotating base 355.

[0151] [An example of the second treatment unit] Next, an example of the second treatment unit will be described with reference to FIGS.

[0152] The second treatment unit 40 comprises a first attachment 41 as a head portion whose one end side (upper end side) is connected to the main body portion 20, and a second attachment 42 as a second treatment portion (treatment section) connected to the other end side (lower end side) of the first attachment 41.

[0153] The first attachment 41 includes a first case 410 that forms the outer shell of the first attachment 41. This first case 410 is also called a head housing, and can be formed using, for example, a synthetic resin material.

[0154] The first case 410 is formed by joining a plurality of divided bodies, and a cavity is formed inside the first case 410 formed by joining the divided bodies. The second treatment unit side gear mechanism 45 described later is housed inside this cavity.

[0155] Specifically, the first case 410 has a substantially rectangular shape when viewed from the back, and includes an attachment case 411 that opens downward, and an attachment base 412 that is disposed so as to cover the opening of the attachment case 411. The attachment base 412 is fixed to the attachment case 411 by an attachment base fastening screw 4123.

[0156] The attachment case 411 includes a peripheral wall 4111 and a top wall 4112 connected to the upper end of the peripheral wall 4111. The peripheral wall 4111 is shaped so that its diameter gradually increases from the upper end side, which is the side attached to the main body 20, toward the lower end side. The top wall 4112 is plate-shaped, and a flat top surface 4112a extending horizontally of the top wall 4112 is the end surface on the side attached to the main body 20. When the second treatment unit 40 is attached to the main body 20, the top surface 4112a is configured to be substantially flush with the lower surface (the end surface of the main body on the side where the treatment unit is attached).

[0157] This makes it easy to design the shapes of the main body 20 and the second treatment unit 40 so that when the second treatment unit 40 is attached to the main body 20, there is a smooth connection at the joint.

[0158] In addition, in this embodiment, the joint between the main body 20 and the treatment unit is made to have a flat surface. This allows the joint to be smoothly connected, while making it easier to make the shapes of other parts various shapes. In other words, it is possible to improve the design of the scalp care device 10, which is configured to be able to replace multiple treatment units, while improving the design freedom of the main body 20 and the treatment unit.

[0159] Furthermore, by making the joint portion between the main body 20 and the second treatment unit 40 flat, the internal space can be easily sealed using a sealing member such as an O-ring and a packing. In this embodiment, as described above, the main body 20 has a waterproof structure. In this way, for example, during bathing, the scalp care device 10 formed by attaching the second treatment unit 40 to the main body 20 can be used to perform care such as washing the hair (scalp cleaning) and massaging the scalp (scalp care).

[0160] Further, a through hole 4112b penetrating in the vertical direction is formed in the top wall 4112, and the second treatment unit side drive transmission part 452 is inserted into this through hole 4112b. The second treatment unit side drive transmission part 452 is formed so that a regular hexagonal (polygonal) space opens upward in a plan view of the second treatment unit 40 (a state in which the first attachment 41 is viewed from the upper side in the vertical direction). This regular hexagonal (polygonal) space is formed so as to have approximately the same size as the outer diameter of the joint 261 of the main body side drive transmission part 26. Then, when the second treatment unit 40 is attached to the main body part 20, the joint 261 of the main body side drive transmission part 26 is inserted into this regular hexagonal (polygonal) space.

[0161] Further, the top wall 4112 is formed with a hook insertion recess 4112c into which the hook accommodating portion 2132 and the hook 28 of the main body 20 are inserted when the second treatment unit 40 is attached to the main body 20. An engagement portion 4112d that engages with the hook 28 when the second treatment unit 40 is attached to the main body 20 is formed in the hook insertion recess 4112c.

[0162] Furthermore, the top wall 4112 is also formed with a through hole 4112e penetrating in the vertical direction, and a push rod 441 is inserted into this through hole 4112e while being biased downward by a biasing spring 442. When the second treatment unit 40 is attached to the main body 20, the push rod 441 presses the rubber switch button 234 upward. In this way, the connection detection switch 233 detects the pressure by the push rod 441 (that the second treatment unit 40 is attached to the main body 20), and the electric motor 235 can be driven by operating the operation switch button 222. By increasing the spring property (biasing force) of the rubber switch button 234, it is also possible to omit the biasing spring 442.

[0163] Furthermore, when the push rod 441 releases the connection detection switch 233 from being pressed down for some reason while the motor 235 is being driven (when the second treatment unit 40 is removed from the main body 20), the motor 235 stops.

[0164] The second treatment unit gear mechanism 45 is arranged in the space inside the attachment case 411 that opens downward.

[0165] The second treatment unit side gear mechanism 45 includes a joint gear 451 that rotates around the vertical direction, and a joint shaft 4511 to which the joint gear 451 is attached in a state of extending in the vertical direction. In this embodiment, a second treatment unit side drive transmission part 452 is formed at the upper end part of the joint gear 451, and a gear part 4521 is formed at the lower end part of the joint gear 451. The second treatment unit side drive transmission part 452 and the gear part 4521 are formed integrally.

[0166] The second treatment unit gear mechanism 45 also includes a drive transmission gear 453 that meshes with the gear portion 4521 and rotates about the vertical direction, and a drive transmission shaft 4533 that extends in the vertical direction and to which the drive transmission gear 453 is attached.

[0167] Furthermore, the second treatment unit side gear mechanism 45 is provided with two output gears 454 that mesh with the drive transmission gear 453 , and each of the two output gears 454 is supported by an output gear bearing 4541 .

[0168] Furthermore, a rotary base 455 is fixed to each of the two output gears 454. This rotary base 455 includes an output shaft 4551 that protrudes upward from the center of the disk part, and an eccentric shaft 4552 that protrudes downward at a position eccentric from the center of the disk part. The output shaft 4551 is inserted into a through hole formed in the center of the output gear bearing 4541 and the output gear 454, and is fixed by a rotary base fastening screw 4553. In this way, the output gear 454 and the rotary base 455 are attached with the output gear bearing 4541 interposed therebetween.

[0169] In this embodiment, the attachment base 412 is interposed between the output gear bearing 4541 and the output gear 454 .

[0170] Specifically, the attachment base 412 has a pair of rotating base mounting plates inclined at about 15 degrees with respect to the horizontal plane, and each of these rotating base mounting plates is formed with a rotating base accommodating recess 4121. A through hole 4121a is formed in the rotating base accommodating recess 4121, and the output shaft 4551 is inserted therethrough. In this way, the rotating base 455 attached to the output gear 454 is rotatably accommodated in the rotating base accommodating recess 4121 and exposed below the attachment base 412.

[0171] If such a second treatment unit side gear mechanism 45 is provided, the two rotary bases 455 will operate as follows.

[0172] First, when the joint gear 451 rotates in one rotation direction (for example, clockwise), the drive transmission gear 453 rotates in the reverse rotation direction (counterclockwise).

[0173] When the drive transmission gear 453 rotates in the reverse rotation direction (counterclockwise), the two output gears 454 rotate in the one rotation direction (clockwise) described above. That is, the two rotary bases 455 rotate in the one rotation direction (clockwise) described above.

[0174] At this time, the rotating base 455 rotates around the output shaft 4551. Therefore, the eccentric shaft 4552 provided on the rotating base 455 also rotates on a circumference centered on the output shaft 4551. In other words, the eccentric shaft 4552 performs a rotational motion along a plane perpendicular to the axial direction of the output shaft 4551.

[0175] Furthermore, in this embodiment, the rotational motion of the eccentric shaft 4552 can be converted into a reciprocating linear motion.

[0176] Specifically, by providing a guide rail 46 and a slide base 47 that can move along a rail portion 461 of the guide rail 46, the rotational motion of the eccentric shaft 4552 is converted into a reciprocating linear motion.

[0177] In this embodiment, two guide rails 46 are used for each rotating base 455, and each guide rail 46 is provided with an attachment rib 462. Then, with the guide rail 46 accommodated in a guide rail accommodating recess 4122 formed in the attachment base 412, the guide rail 46 is fixed to the attachment base 412 by inserting a guide rail fastening screw 4124 into the attachment rib 462. At this time, the two guide rails 46 are fixed to the attachment base 412 with the openings of the rail portions 461 formed on each of the guide rails 46 facing each other with the rotating base 455 in between.

[0178] The slide base 47 also includes a substantially box-shaped main body 471 and a pair of flanges 472 connected to the upper end of the main body 471. The pair of flanges 472 are inserted into the rails 461 that face each other. This allows the slide base 47 to perform linear reciprocating motion along the rails 461 of the guide rails 46. The main body 471 also includes an eccentric shaft housing 4711, in which the eccentric shaft 4552 is housed.

[0179] With this configuration, when the eccentric shaft 4552 is rotated, the main body portion 471 is pressed by the eccentric shaft 4552 and moves back and forth linearly along the rail portion 461 .

[0180] The second attachment 42 is detachably mounted on the first attachment 41 having such a configuration.

[0181] The second attachment 42 includes a second case 422 that is detachably mounted to the first attachment 41 , and a rubber cover 421 that is attached to the second case 422 .

[0182] The rubber cover 421 can be made of a flexible material such as elastomer, and is set to have substantially the same shape and size as the first attachment 41.

[0183] Further, to this rubber cover 421, a second case 422 made of a material harder than rubber cover 421 made of a flexible member is attached.

[0184] Specifically, mounting protrusions 4224 that protrude upward are provided along each side of second case 422. Then, these mounting protrusions 4224 are fitted into mounting holes 4212 that are provided so as to penetrate in the up-down direction along each side of the outer circumferential edge of rubber cover 421, thereby allowing rubber cover 421 to be attached to second case 422. At this time, protrusions (not shown) formed on rubber cover 421 and protruding upward are inserted and fitted into engagement hooks (not shown) formed on second case 422 and protruding downward.

[0185] In this way, the second case 422 made of a material harder than the rubber cover 421 is attached to the flexible rubber cover 421, so that the second attachment 42 can be easily attached to and detached from the first attachment 41. In addition, the portion of the rubber cover 421 to which the second case 422 is not attached is the conforming deformation portion 4213, and the massage element base 423 is fitted into the conforming deformation portion 4213. In this embodiment, the second case 422 includes a frame portion 4221 and a crosspiece portion 4222, and two rectangular holes are formed at positions symmetrical with respect to the center of the second case 422. The portions corresponding to the two rectangular holes in the rubber cover 421 are the conforming deformation portion 4213. That is, in this embodiment, the rubber cover 421 is formed with two rectangular conforming deformation portions 4213.

[0186] The massage element base 423 is made of a resin or the like having higher rigidity than the rubber cover 421, and is a member that is difficult to deform. The massage element base 423 includes a base portion 4231 attached to the main body portion 471 of the slide base 47, and a core portion 4232 provided so as to protrude downward from the lower surface of the base portion 4231. The massage element base 423 also includes a pair of flange portions 4233 connected to the upper end of the base portion 4231. In this embodiment, nine core portions 4232 are provided in each massage element base 423.

[0187] A slide base accommodating portion 4231a is formed in the base portion 4231, and the main body portion 471 of the slide base 47 is inserted into the slide base accommodating portion 4231a, so that the massage element base 423 is attached to the rotating base 455. In this way, the following deformation portion 4213 is deformed following the movement of the massage element base 423.

[0188] As described above, in this embodiment, the eccentric shaft 4552 rotates on a circumference centered on the output shaft 4551. In other words, the eccentric shaft 4552 performs rotational motion along a plane perpendicular to the axial direction of the output shaft 4551.

[0189] This rotational motion is converted into reciprocating linear motion by the guide rail 46 and the slide base 47 .

[0190] Therefore, when the eccentric shaft 4552 rotates, the second massagers (massage elements) 43 attached to each of the eccentric shafts 4552 perform a reciprocating linear motion along a plane perpendicular to the axial direction of the output shaft 4551 in accordance with the rotation of the eccentric shaft 4552.

[0191] In this manner, in the present embodiment, each of the second massage elements 43 performs a reciprocating linear motion (reciprocating motion) along a plane perpendicular to the axial direction of the output shaft 4551. Therefore, the shape of the trajectory drawn when the second massage element 43 is operated is a straight line.

[0192] In this manner, in the present embodiment, units (first treatment unit 30 and second treatment unit 40) having treatment elements with different movements are provided.

[0193] Specifically, the shape of the path (circumference) drawn when the first massager 33 is operated (circular motion) is different from the shape of the path (straight line) drawn when the second massager 43 is operated (reciprocating motion).

[0194] In the present embodiment, at least one of the plurality of massage elements 43 is connected to an output shaft 4551 that is inclined so that the tip thereof faces the central axis of the second attachment 42 serving as the massage section.

[0195] This makes it easier for the massage element 43 to fit the convex curved surface of the scalp.

[0196] In this embodiment, the eccentric shafts 4552 provided on the two rotating bases 455 are arranged to rotate with a phase difference of 180 degrees. In this manner, the eccentric shafts 4552 provided on the respective rotating bases 455 rotate while approaching and moving away from each other. Therefore, the second massagers 43 attached to the respective eccentric shafts 4552 via the slide bases 47 perform reciprocating linear motion while approaching and moving away from each other.

[0197] This configuration simplifies the configuration of the second treatment unit side gear mechanism 45 that transmits the drive of the electric motor (drive source) 235 to the multiple (two) second treatment elements 43. This allows the second treatment unit 40 to be made smaller.

[0198] Furthermore, in this embodiment, the second massage element 43 is formed by fitting the massage element base 423 into the following deformation portion 4213 of the rubber cover 421. That is, in this embodiment, the second massage element 43 is formed by assembling the rubber cover 421, which is a member separate from the massage element base 423 and has a relatively low rigidity, to the massage element base 423, which is a member with a relatively high rigidity.

[0199] The second massage element 43 includes a base 431 and a massage projection 432 that projects downward from a top surface (lower surface) 431a of the base 431 and is brought into contact with the scalp when the scalp care device 10 is in use.

[0200] The base 431 is formed by covering the base 4231 of the treatment element base 423 with the rubber cover 421. The treatment projection 432 is formed by covering the core 4232 of the treatment element base 423 with the rubber cover 421, and the part of the rubber cover 421 that covers the core 4232 is the elastic part 42131. Thus, in this embodiment, the treatment projection 432 has the core 4232 and the elastic part 42131 that covers the core 4232. The core 4232 and the elastic part 42131 are formed of separate members.

[0201] In this embodiment, each of the two second massage elements 43 is provided with thirteen massage protrusions 432, and the tip portion 4322 of each massage protrusion 432 is provided with three small extending protrusions 4322c.

[0202] Next, an example of a method of using the second treatment unit 40 having such a configuration will be described.

[0203] First, the second treatment unit 40 is mounted on the main body 20, and the second treatment unit side drive transmission part 452 is attached to the main body side drive transmission part 26. Then, in this state, the operation switch button 222 is pressed to drive the electric motor 235, thereby rotating the main body side drive transmission part 26.

[0204] In this way, the rotation of the main body side drive transmission section 26 is transmitted to the second treatment unit side drive transmission section 452, and the second treatment unit side drive transmission section 452 rotates together with the main body side drive transmission section 26. At this time, the gear section 4521 of the joint gear 451 attached to the second treatment unit side drive transmission section 452 and the drive transmission gear 453 also rotate together with the second treatment unit side drive transmission section 452.

[0205] As the gear portion 4521 and the drive transmission gear 453 rotate, the two output gears 454 rotate at a reduced speed.

[0206] In this manner, when the two output gears 454 rotate, the two rotary bases 455 connected to the two output gears 454, respectively, also rotate.

[0207] At this time, the eccentric shafts 4552 provided on the respective rotary bases 455 perform rotational motion along a plane perpendicular to the axial direction of the output shafts 4551 .

[0208] When the eccentric shaft 4552 rotates, the slide base 47 and the second massagers 43 attached to the eccentric shaft 4552 perform a reciprocating linear motion in accordance with the rotation of the eccentric shaft 4552. At this time, the massage protrusions 432 provided on each second massager 43 also perform a reciprocating linear motion in accordance with the reciprocating linear motion of the second massager 43.

[0209] In this state, if the treatment projection 432 is brought into contact with the scalp, the treatment projection 432 that moves back and forth in a straight line can perform care (scalp care) such as washing and massaging the scalp.

[0210] Hereinafter, an example of the operation of disconnecting the attachment in the second treatment unit will be described with reference to Figs. 58 to 61.

[0211] 58 and 59 show a load state within a predetermined range. The slide base 47, which is a connecting part, has at least a pair of first parallel surfaces 4712, 4712, and the treatment element base 423, which is a connected part, has at least a pair of second parallel surfaces 4231b, 4231b. By inserting the main body 471 of the slide base 47 into the slide base accommodating part 4231a of the treatment element base 423, the slide base 47 is fitted and held between the pair of second parallel surfaces 4231b, 4231b of the treatment element base 423. In this way, when an appropriate load within a predetermined range is applied to the treatment protrusion 432 through the tip portion 4322 in the direction of the arrow A2, the treatment element base 423, which is a connected part, is held while being suppressed from tilting by the pair of second parallel surfaces 4231b, 4231b of the treatment element base 423.

[0212] 60 and 61 show a state when a load of a predetermined value or more is applied to the treatment element base 423, such as when the treatment projection 432 comes into contact with a foreign object. The first attachment 41 and the second attachment 42 are engaged with at least one pair of engagement parts (hooks, hook insertion recesses). When a load of a predetermined value or more is applied to the treatment element base 423, the second parallel surface 4231b of the treatment element base 423 is deflected and deformed, and the holding of the slide base 47 by the pair of second parallel surfaces 4231b, 4231b is released. At this time, the treatment element base 423, which is the connected part, is inclined with the end of the flange portion 4233 as a base point. Then, the opposite end of the flange portion 4233 pushes open the gap between the frame of the first attachment 41 and the frame of the second attachment 42, and the engagement between the first attachment 41 and the second attachment 42 is released.

[0213] [Example of a stand] Next, an example of a stand for placing the treatment unit will be described with reference to FIGS.

[0214] The first stand 60 is a stand for placing the first treatment unit 30, and is configured so that the first treatment unit 30, which is a combination of the first attachment 31 and the second attachment 32, can be placed on the first stand 60.

[0215] The second stand 70 is a stand for placing the second treatment unit 40, and is configured so that the second treatment unit 40, which combines the first attachment 41 and the second attachment 42, can be placed on the second stand 70.

[0216] A treatment unit (either the first treatment unit 30 or the second treatment unit 40) placed on a stand can be stacked on top of another treatment unit (the other of the first treatment unit 30 or the second treatment unit 40) placed on another stand.

[0217] In this embodiment, the first treatment unit 30 arranged on the first stand 60 can be placed on the second treatment unit 40 arranged on the second stand 70 (see FIG. 66).

[0218] In the present embodiment, the second treatment unit 40 arranged on the second stand 70 can be placed on the first treatment unit 30 arranged on the first stand 60 (see FIG. 67).

[0219] In other words, in this embodiment, the stacking order (vertical arrangement) of the first treatment unit 30 arranged on the first stand 60 and the second treatment unit 40 arranged on the second stand 70 can be freely reversed up or down.

[0220] Furthermore, in this embodiment, as shown in Figures 68 and 69, the first stand 60 can be placed on top of the second treatment unit 40 placed on the second stand 70, and the first treatment unit 30 connected to the main body 20 can be placed on top of the first stand 60.

[0221] In addition, in this embodiment, although not shown in the figure, a second stand 70 can be placed on top of the first treatment unit 30 placed on the first stand 60, and a second treatment unit 40 connected to the main body 20 can be further placed on top of the second stand 70.

[0222] That is, in this embodiment, it is possible to mount either of the treatment units (the first treatment unit 30, the second treatment unit 40) on the main body 20 and store the scalp care device 10 in an assembled state.

[0223] [Actions and Effects] The following describes the characteristic configurations of the scalp care devices shown in the above-described embodiment and the modified examples thereof, and the effects obtained thereby.

[0224] (1) The scalp care device 10 shown in the above embodiment and its modified example includes a main body 20 having an enclosure 21 in which an electric motor (driving source) 235 and a storage battery (power source) 232 are housed. The scalp care device 10 also includes treatment units (first treatment unit 30, second treatment unit 40) that are replaceably attached to and detached from the main body 20. The enclosure 21 includes a cylindrical wall portion (enclosure main body) 211 formed in a cylindrical shape. The enclosure 21 also includes fastening parts (main body lid 2122, bottom plate 213) that are arranged to cover the opening of the cylindrical wall portion 211 and are fastened. The enclosure 21 also includes compressed parts (upper seal member 2141, lower seal member 217) that are compressed and sealed between the cylindrical wall portion 211 and the fastening parts 2122, 213. The compressed parts 2141, 217 have first seal parts 2141a, 2171 that seal the gap between the inner surface of the cylindrical wall part 211 and the fastened parts 2122, 213. In addition, the compressed parts 2141, 217 have second seal parts 2142, 2172 that seal the fastening parts between the cylindrical wall part 211 and the fastened parts 2122, 213. The first seal parts 2141a, 2171 and the second seal parts 2142, 2172 are integrally formed.

[0225] In the scalp care device 10 shown in the present embodiment and its modified example, the compressed parts 2141, 217 are compressed in the vertical direction between the enclosure 21 and the fastened parts (main body cover 2122, bottom plate 213), thereby waterproofing the inside of the enclosure 21 of the main body part 20. Also, since the first seal parts 2141a, 2171 and the second seal parts 2142, 2172 are integrally formed, there is no need to individually arrange seal members at each location, and it is possible to suppress the occurrence of waterproofing defects due to forgetting to attach the seal members or uneven attachment.

[0226] In this way, the scalp care device 10 shown in the above embodiment and its modified example makes it possible to suppress the occurrence of waterproofing defects due to forgetting to install or uneven installation of the sealing member at the fastening portion between the enclosure body and the fastened part.

[0227] (2) The compressed part (lower sealing member 217A) functions as a waterproof valve to prevent water from entering the enclosure 21 and also functions as a relief valve to discharge gas generated within the enclosure 21 to the outside.

[0228] This allows the main body 20 to have a structure that is resistant to external pressure and that allows gas or the like generated inside to escape easily.

[0229] (3) The main body 20 is provided with a main body side drive transmission part 26 having a hexagonal columnar joint 261. The treatment units (first treatment unit 30, second treatment unit 40) are provided with a first treatment unit side drive transmission part (treatment unit side drive transmission part) 352 having a hexagonal insertion hole 3522 into which the joint 261 is inserted.

[0230] In this way, the driving force of the electric motor 235 can be efficiently transmitted to the treatment units 30, 40 attached to the main body 20.

[0231] (4) The length L1 of the widest portion of the tip surface 2611a of the joint 261 intersecting the axial direction of the joint 261 is shorter than the length L2 of the opposite side of the hexagonal insertion hole 3522.

[0232] By doing this, even if the phase between the joint 261 of the main body 20 and the insertion hole 3522 of the treatment units 30, 40 is misaligned, the phases are corrected during insertion, and the joint 261 can be easily inserted into the insertion hole 3522.

[0233] (5) Diameter R1 of a circle circumscribing tip surface 2611a of joint 261 is equal to or less than half diameter R2 of a circle circumscribing hexagonal insertion hole 3522. Between tip surface 2611a and outer surface 2613 of joint 261, R portion 2614 having a radius of curvature equal to or greater than the radius of the circle circumscribing hexagonal insertion hole 3522 is formed.

[0234] By doing this, even if the phase between the joint 261 of the main body 20 and the insertion hole 3522 of the treatment units 30, 40 is misaligned, the phases are corrected during insertion, and the joint 261 can be easily inserted into the insertion hole 3522.

[0235] (6) The joint 261 has a flange portion 2616 formed at a base end portion of the joint 261. The joint 261 is configured to be held relative to the enclosure 21 by the flange portion 2616 of the joint 261 being pressed from the tip end side of the joint 261 by the joint presser plate 27.

[0236] In this way, the transmission of the driving force of the electric motor 235 is not hindered, the joint 261 is prevented from coming off, and the joint 261 can be held relative to the enclosure 21.

[0237] (7) Into the joint 261, the output shaft 246 having a shaft-side D-cut surface 2461 at the tip end is press-fitted.

[0238] In this way, the first treatment unit side drive transmission part (treatment unit side drive transmission part) 352 can be attached to the main body side drive transmission part 26 in a state in which free rotation is suppressed.

[0239] (8) The joint 261 is formed with an inner D-cut surface 2615 into which the shaft side D-cut surface 2461 of the output shaft 246 is fitted, and an air vent portion 2615a is formed on the inner D-cut surface 2615 of the joint 261 to bleed air when the output shaft 246 is pressed in.

[0240] This allows the air vent portion 2615a to function as an air vent hole when the output shaft 246 is press-fitted into the joint 261, making it easier to press-fit the output shaft 246.

[0241] [others] The scalp care device according to the present disclosure has been described above, but it is not limited to this description, and it will be obvious to those skilled in the art that various modifications and improvements are possible.

[0242] For example, it is possible to make a scalp care device by appropriately combining the configurations shown in the above-mentioned embodiment and its modified examples.

[0243] In the above embodiment and its modified example, various treatment units are attached to one type of main body 20, but it is also possible to provide multiple types of main body having different motor performance and battery capacity. That is, it is also possible for the scalp care device 10 to have multiple types of main body having a common main body side drive transmission unit.

[0244] In the above embodiment and its modified example, the treatment unit has a treatment element that moves along a plane perpendicular to the axial direction of the output shaft, but it is also possible to use a treatment unit having a treatment element that moves in a direction intersecting with the plane perpendicular to the axial direction of the output shaft. For example, it is also possible to use a treatment unit having a treatment element that reciprocates in the axial direction of the output shaft, or a treatment unit having a treatment element that oscillates in a direction intersecting with the plane perpendicular to the axial direction of the output shaft.

[0245] In addition, in the above embodiment and its modified example, a treatment unit having a massage element that performs a rotational motion along a circle is exemplified, but it is also possible to use a treatment unit having a massage element that performs a rotational motion along an ellipse.

[0246] In addition, the specifications of the treatment element, treatment protrusions, and other details (shape, size, layout, etc.) can be changed as appropriate.

[0247] (1) That is, the scalp care device has a function of massaging the scalp. In the housing that contains the parts that need to be waterproofed, the waterproof structure required for the screw part and the inner circumference of the enclosure is provided by screwing and compressing the integrated sealing member between the molded product and the enclosure, thereby providing a leak-proof waterproof structure.

[0248] (2) The scalp care device according to (1) above is characterized in that it is provided with a scalp cleaning function.

[0249] (3) The scalp care device according to (1) or (2) above, wherein the waterproof structure of the inner periphery of the enclosure serves both as a waterproof valve and a safety valve (relief valve).

[0250] It should be noted that the above-described embodiments are intended to illustrate the technology of the present disclosure, and various modifications, substitutions, additions, omissions, and the like can be made within the scope of the claims or their equivalents. [Industrial Applicability]

[0251] The present disclosure is applicable to scalp care devices that can suppress the occurrence of waterproofing defects due to forgetting to install a seal member or installation variations at a fastening portion between an enclosure body and a fastening part. Specifically, the present disclosure is applicable to various scalp care devices, including those for home and commercial use. [Explanation of symbols]

[0252] 10 Scalp care device 20 Main body 21 Enclosure (Housing) 26 Main body drive transmission section 27 Joint pressure plate (separate component) 30 First Treatment Unit 40 2nd Treatment Unit 211 Cylindrical wall portion (enclosure body) 217 Lower seal member (compressed part) 217A Lower seal member (compressed part) 232 Storage battery (power source) 235 Electric motors (motors, driving sources) 246 Output shaft 261 Joints 352 First treatment unit side drive transmission part 452 Second treatment unit side drive transmission part 2122 Main body lid (parts to be fastened) 2141 Upper seal member (compressed part) 2141a First seal part 2142 Second seal part 2171 First seal part 2172 Second seal part 2461 Shaft side flat surface (shaft side D-cut surface) 2611a Tip surface 2613 Exterior 2614 R section 2615 Inner flat surface (inner D-cut surface) 2615a Air vent (groove) 2616 Flange part 3522 Insertion hole R1 diameter R2 diameter

Claims

1. a main body having an enclosure in which a drive source and a power source are housed; A treatment unit that is replaceably attached to the main body; Equipped with The enclosure comprises: An enclosure body formed in a cylindrical shape; a fastening part that is arranged to cover an opening of the enclosure body and is fastened to the enclosure body; A compressed part that is compressed and sealed between the enclosure body and the fastened part; Equipped with The compressed part has an annular first seal portion that seals a gap between the inner surface of the enclosure body and the fastened part, and an annular second seal portion that is arranged radially inside the first seal portion and seals a fastening part between the enclosure body and the fastened part, The first seal portion and the second seal portion are integrally formed by being connected to each other by a connecting portion extending radially inward from an inner edge of the first seal portion. Scalp care device.

2. The compressed part has a tongue portion that extends radially outward from the outer edge of the first seal portion and is compressed radially between the enclosure body and the fastened part, and has a function as a waterproof valve that prevents water from entering the enclosure and a function as a relief valve that discharges gas generated in the enclosure to the outside. A scalp care device according to claim 1.

3. The main body includes a main body side drive transmission part having a hexagonal column-shaped joint, The treatment unit includes a treatment unit side drive transmission part having a hexagonal insertion hole into which the joint is inserted. A scalp care device according to claim 1 or 2.

4. The length of the widest point on the tip surface of the joint intersecting the axial direction of the joint is shorter than the length of the opposite side of the hexagonal insertion hole, A scalp care device according to claim 3.

5. The diameter of a circle circumscribing the tip surface of the joint is half or less of the diameter of a circle circumscribing the hexagonal insertion hole, Between the tip surface and the outer surface of the joint, an R portion having a curvature radius equal to or greater than the radius of a circle circumscribing the hexagonal insertion hole is formed. A scalp care device according to claim 4.

6. The joint has a flange portion formed at a base end portion of the joint, The flange portion of the joint is pressed from the tip end side of the joint by a joint pressing plate, so that the joint is held relative to the enclosure. A scalp care device according to any one of claims 3 to 5.

7. An output shaft having a shaft-side D-cut surface at its tip is press-fitted into the joint. A scalp care device according to any one of claims 3 to 6.

8. The joint has an inner D-cut surface into which the shaft-side D-cut surface of the output shaft is fitted, An air vent portion is formed on the inner D-cut surface of the joint to vent air when the output shaft is press-fitted. A scalp care device according to claim 7.

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