JP7599093B2 - Scalp Care Device - Google Patents

Description

This disclosure relates to a scalp care device.

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.

In Patent Document 1, an O-ring is provided at each fastening point between the enclosure body and the fastened part, creating a waterproof structure that prevents water from entering the enclosure body.

JP 2012-61174 A

In such scalp care devices, it is necessary to attach sealing members to all fastening parts of the enclosure body, and waterproofing problems may occur due to forgetting to attach the sealing members or due to uneven installation.

This disclosure has been made in consideration of the problems inherent in the conventional technology. The purpose of this disclosure is to provide a scalp care device that can prevent waterproofing problems caused by forgetting to install or installing the seal member unevenly at the fastening portion between the enclosure body and the fastened part.

The scalp care device according to the 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 the 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 portion that seals the gap between the inner surface of the enclosure body and the fastened part, and a second seal portion that seals the fastened part between the enclosure body and the fastened part. The first seal portion and the second seal portion are formed integrally.

The present disclosure provides a scalp care device that can prevent waterproofing problems caused by forgetting to install or installing the seal member unevenly at the fastening portion between the enclosure body and the fastened part.

FIG. 2 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. 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. 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. FIG. 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. FIG. FIG. 7 is a cross-sectional view taken along line AA in FIG. 6. FIG. 8 is an enlarged view of part B in FIG. 7 . FIG. 8 is an enlarged view of part C in FIG. 7 . 7 is a cross-sectional view taken along the line D-D in FIG. 6 . FIG. 11 is an enlarged view of part E in FIG. 10 . FIG. FIG. 4 is a perspective view of an upper seal member formed integrally with the main body lid. FIG. FIG. 4 is a perspective view of a lower seal member formed integrally with the bottom plate. FIG. 4 is a plan view of the main body to which the first treatment unit is attached. Cross-sectional view taken along the line F-F in FIG. 16 . FIG. 18 is an enlarged view of part G in FIG. 17 . FIG. 18 is an enlarged view of part H in FIG. 17 . FIG. 4 is a side view showing a state in which the joint is removed from the joint gear. 21 is a view of the joint of FIG. 20 viewed in the direction of line I. 21 is a view of the coupling gear of FIG. 20 viewed in the direction of line J. 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. 24 is a view of the joint of FIG. 23 viewed in the direction of line K. 13 is a cross-sectional view of the main body showing a modified example of the lower seal member. FIG. FIG. 26 is an enlarged view of part L in FIG. 25 . 17 is an exploded cross-sectional view of the scalp care device, corresponding to the cross-section M-M in FIG. 16. FIG. 28 is an enlarged view of a portion of FIG. 27 . 17 is a cross-sectional view taken along the line M-M in FIG. 16 . FIG. 30 is an enlarged view of a portion of FIG. 29 . FIG. 4 is a perspective view showing a movable contact and a fixed contact of the connection detection switch. FIG. 13 is a diagram showing a modified example of the detection mechanism. 13 is a table showing combinations of detection patterns of a detection mechanism according to a modified example. 13A and 13B are diagrams showing an example of a detection pattern of a detection mechanism according to a modified example. 13A and 13B are diagrams showing an example of a detection pattern of a detection mechanism according to a modified example. 13A and 13B are diagrams showing an example of a detection pattern of a detection mechanism according to a modified example. 13A and 13B are diagrams showing an example of a detection pattern of a detection mechanism according to a modified example. 13A and 13B are diagrams showing an example of a detection pattern of a detection mechanism according to a modified example. 13A and 13B are diagrams showing an example of a detection pattern of a detection mechanism according to a modified example. FIG. 4 is a perspective view of the first treatment unit seen from one direction. FIG. 11 is a perspective view of the first treatment unit seen from another direction. FIG. 4 is an exploded view of the first treatment unit. FIG. 4 is a perspective view of the first attachment of the first treatment unit viewed from one direction. FIG. 11 is a perspective view of the first attachment of the first treatment unit viewed from another direction. FIG. 4 is a perspective view of the second attachment of the first treatment unit from one direction. N-N cross-sectional view of Figure 45. FIG. Cross-sectional view taken along line O-O in Figure 47. A cross-sectional view corresponding to the O-O cross section in Figure 47, showing a state in which a load within a predetermined range is applied to the treatment protrusion. A cross-sectional view corresponding to the O-O cross section in Figure 47, showing a state in which a load greater than a predetermined value is applied to the treatment protrusion. A cross-sectional view showing the rotating base removed from the treatment element base. FIG. 11 is another cross-sectional view showing the state in which the rotating base is detached from the treatment element base. FIG. 4 is a cross-sectional view showing the rotating base attached to the treatment element base. FIG. 4 is a perspective view of the second treatment unit seen from one direction. FIG. 11 is a perspective view of the second treatment unit seen from another direction. FIG. 4 is an exploded view of the second treatment unit. Plan view of the second treatment unit. Cross-sectional view of FIG. 57 taken along line P-P. Cross-sectional view taken along line QQ in Figure 57. A cross-sectional view corresponding to the P-P cross section in Figure 57, showing a state in which a load greater than a predetermined value is applied to the treatment protrusion. A cross-sectional view corresponding to the QQ section in Figure 57, showing a state in which a load greater than a predetermined value is applied to the treatment protrusion. FIG. 4 is a perspective view showing a state in which the first treatment unit is placed on the first stand. FIG. 4 is an exploded side view showing the first treatment unit and the first stand. FIG. 13 is a perspective view showing the second treatment unit placed on the second stand. FIG. 13 is an exploded side view showing the second treatment unit and the second stand. A side view showing the state in which a second stand with a second treatment unit placed thereon is placed, and a first stand with a first treatment unit placed thereon is placed. 13 is a side view showing a state in which a first stand on which a first treatment unit is placed is placed, and a second stand on which a second treatment unit is placed is placed on top of the first stand. FIG. 13 is a perspective view showing a state in which a second stand carrying a second treatment unit is placed, and a first stand carrying a first treatment unit connected to a main body portion is placed on top of the second stand. FIG. 69 is a perspective view of the scalp care device shown in FIG. 68 from another direction.

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

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.

In the following, the direction in which the treatment unit moves relative to the main body when attaching or detaching the treatment unit to the main body is defined as the up-down direction. In addition, the above and below are defined with the treatment unit positioned below the main body.

[An example of a scalp care device]
The scalp care device 10 according to this embodiment includes a main body 20 housing an electric motor 235 as a driving source, and a plurality of treatment units that are replaceably attached to and detached from the main body 20.

In this way, in the scalp care device 10 according to this embodiment, multiple treatment units can be attached and detached interchangeably to the main body 20.

In addition, in this embodiment, as shown in Figures 1 to 4, a first treatment unit 30 and a second treatment unit 40 are exemplified as multiple treatment units that can be attached and detached to the main body 20 in an interchangeable manner.

In other words, in this embodiment, the scalp care device 10 is equipped with two types of treatment units, a first treatment unit 30 and a second treatment unit 40, and each treatment unit is detachably attached to a common main body 20.

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

Furthermore, the scalp care device 10 is provided with a first stand 60 for placing the first treatment unit 30 and a second stand 70 for placing the second treatment unit 40 (see Figures 62 to 69).

[An example of the main body]
First, an example of the main body will be described with reference to FIGS.

In this embodiment, the main body 20 includes an enclosure 21 that forms the outer shell, as shown in Figs. 5 to 19. This enclosure 21 is also called a housing, and can be made, for example, from an insulating synthetic resin material.

In this embodiment, the enclosure 21 is formed by joining a number of divided bodies, and a cavity is formed inside the enclosure 21 formed by joining the divided bodies. Various electrical 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.

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

A roughly rectangular opening is formed at one end (lower end) of the cylindrical wall 211 where the treatment unit is attached. And, a roughly rectangular opening with a smaller opening area than the opening formed at the one end (lower end) is formed at the other end (upper end) of the cylindrical wall 211.

In addition, 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 gradually reduces from one end side to the midpoint in the vertical direction, and also gradually reduces from the other end side to 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).

In this way, by providing a reduced diameter portion midway up and down on 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.

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

The body lid 2122 shown in FIG. 12 is fixed to the enclosure 21 by the 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 the upper sealing member 2141, which is the compressed part.

The upper seal member 2141 shown in Figs. 12 and 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 the 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 material such as elastomer. In this embodiment, the main body lid 2122 and the upper seal member 2141 are integrated by two-color molding.

The upper seal member 2141, in which the first seal portion 2141a and the second seal portion 2142 are integrally formed, is compressed vertically 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).

In addition, the top cover 212 is provided with an operating 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 electric motor 235 on and off).

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, the main body lid 2122 is formed with a through hole 2122a that penetrates in the vertical direction, and the power switch is mounted in 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 gasket 221 that is integrally formed with the main body lid 2122. This prevents water from entering the inside through the through hole 2122a.

The operation panel 2121 also has a through hole 2121a that penetrates in the vertical direction, and an operation switch button 222 is inserted into this through hole 2121a. Note that, although a push-type power switch is 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.

The 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 disposed below the control circuit 22. The motor base 23 is fixed to the enclosure 21 by a motor base fastening screw 231.

The motor 235 is held on the upper part of the motor base 23, and the storage battery 232 is held on the lower part of the motor base 23. The storage battery 232 may be a lithium ion battery, a nickel metal hydride battery, or the like.

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 pressure from a push rod of the treatment unit, which will be described later, when all of the attachments that make up the treatment unit are attached to the main body 20. This connection detection switch 233 detects pressure from the push rod, so that the motor 235 can be driven. In other words, in this embodiment, when the connection detection switch 233 does not detect pressure from the push rod, the motor 235 will not be driven even if the operation switch button 222 is operated.

The 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 (not shown) or the like can be inserted. 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 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, etc.

In addition, 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. In other words, 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 approximately aligned with the vertical direction.

The electric motor shaft 2352 protruding downward is connected to the joint 261 of the main body drive transmission unit 26 via the main body gear mechanism 24.

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

The main body gear mechanism 24 also includes a first gear 242 that meshes with the pinion gear 241 and rotates around the vertical direction, and a first shaft 2421 to which the first gear 242 is attached and extends in the vertical direction.

The main body gear mechanism 24 further includes a second gear 243 that meshes with the first gear 242 and rotates around the vertical direction, and a second shaft 2431 that extends in the vertical direction and to which the second gear 243 is attached.

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

The main body gear mechanism 24 also includes an output gear 245 that meshes with the third gear 244 and rotates around 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.

The lower end of the output shaft 246 is connected to a joint 261 of the main body drive transmission section 26. This main body 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 section 20.

The joint 261 of the main body side drive transmission section 26 shown in Figures 20 to 22 comprises 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.

In this embodiment, the length L1 of the widest point on the tip surface 2611a of the body 2611 that intersects with the axial direction of the joint 261 is shorter than the length L2 of the opposite side of the hexagonal insertion hole 3522.

In this embodiment, the diameter R1 of the circle circumscribing the tip surface 2611a of the main body 2611 is less than half the diameter R2 of the circle circumscribing the hexagonal insertion hole 3522. Furthermore, in this embodiment, an R portion 2614 having a radius of curvature equal to or greater 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 2611.

As shown in FIG. 23, an output shaft 246 having a shaft side flat surface (shaft side D-cut surface) 2461 at its tip (lower end) is press-fitted into the joint 261. Furthermore, as shown in FIG. 24, an air vent (groove) 2615a is formed in the center of the inner flat surface (inner D-cut surface) 2615 of the joint 261 to vent air when the output shaft 246 is press-fitted. This air vent 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.

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

The above-mentioned configuration allows the drive to be 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 drive transmission unit 26 has a regular hexagonal shape (polygonal shape) when viewed from the back of the main body 20 (when the main body 20 is viewed from the bottom in the vertical direction, which is the direction in which the main body 20 and the treatment unit are attached and detached). This allows the treatment unit drive transmission unit described later to be attached to the main body drive transmission unit 26 in a state in which free rotation is suppressed. The main body drive transmission unit 26 and the treatment unit drive transmission unit 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 drive transmission unit 26 and the treatment unit drive transmission unit.

In addition, in this embodiment, the opening formed at one end (lower end) of the cylindrical wall portion 211 is closed by a bottom plate 213 as a fastening part. This bottom plate 213 is fixed to the enclosure 21 by a bottom plate fastening screw 215.

In this embodiment, the bottom plate 213 is plate-shaped, and the flat lower surface of the bottom plate 213 that extends horizontally is the end surface on which the treatment unit is attached.

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.

A hook housing section 2132 that protrudes downward and opens radially outward is formed on the underside of the bottom plate 213, and a hook 28 that engages with an engagement section of the treatment unit (described later) is housed in the hook housing section 2132. The hook 28 is housed in the hook housing section 2132 while being biased radially outward by a biasing spring 281.

The bottom plate 213 is also formed with an output shaft insertion hole 2134 that penetrates vertically and into which the output shaft 246 is inserted. The output shaft packing 25 seals the gap that is 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 pressing plate 27 to seal the gap that is formed between the outer surface of the output shaft 246 and the inner surface of the output shaft insertion hole 2134.

The joint presser plate 27 is fixed to the bottom plate 213 by the joint presser plate fastening screw 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 screw 216 while being accommodated in the joint presser plate accommodating recess.

Furthermore, a through hole that penetrates the bottom plate 213 in the vertical direction is formed, and a rubber switch button 234 (see Figure 27) is attached to this through hole.

The bottom plate 213 shown in FIG. 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, which is a compressed part.

The lower seal member 217 shown in Figs. 14 and 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 the 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. This lower seal member 217 can be made of a flexible material such as elastomer. In this embodiment, the bottom plate 213 and the lower seal member 217 are integrated by two-color molding.

The lower seal member 217, which is formed integrally with the first seal portion 2171 and the second seal portion 2172, 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).

In this manner, in this embodiment, the main body 20 has a waterproof structure, which prevents water from entering the cavity within the enclosure 21.

Furthermore, as shown in Figs. 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 an elastomer.

The main body side seal member 218 formed at the end of the enclosure 21 on the treatment unit side is compressed vertically between the enclosure 21 and the treatment unit, thereby waterproofing the inside of the connection between the main body 20 and the treatment unit (see Figure 19).

In this way, in this embodiment, the connection between the main body 20 and the treatment unit is made waterproof, preventing water from entering the inside.

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 Figures 25 and 26) may function both as a waterproof valve and as a relief valve (safety valve). In other words, the function as the prevention 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 exhaust gas generated within the enclosure 21 to the outside.

The lower seal member 217A has a tongue portion 2174 that extends radially outward, and the tongue portion 2174 is compressed radially between the enclosure 21 and the bottom plate 213. This makes it possible to give the main body portion 20 a structure that is resistant to external pressure and that is easy to release if gas or the like is generated inside.

Below, an example of a detection mechanism provided in a scalp care device is described using Figures 27 to 31.

Here, the operation of the detection mechanism 29 will be explained using the example of mounting the first treatment unit 30 to the main body 20. The operation of the detection mechanism 29 when mounting the second treatment unit 40 to the main body 20 is similar to that when mounting the first treatment unit 30 to the main body 20, so the explanation will be omitted.

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 below, and a detectable protrusion 343 arranged on the second attachment 32 described below.

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

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

As shown in Figures 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 top surface of the first attachment 31, and the tip of this push rod 341 pushes up the switch button 234 arranged on the main body 20.

When the tip (upper end) of the pushed-up switch button 234 is pushed upward, the movable contact 2331 comes into contact with the fixed contact 2332, turning on the connection detection switch 233.

For example, an electrical 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 of the connection detection switch 233 (movable side contact 2331, fixed side contact 2332) may be provided in an electric circuit, and power may be supplied directly to the electric motor 235 via these contacts.

Figure 31 shows an example of an electrical circuit switch having a movable contact 2331 and a fixed contact 2332.

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

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 direction of 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 direction of the axis C1 of the movable contact surface 2331a.

By configuring the movable side contact 2331 and the fixed side contact 2332 in this manner, even if a foreign object enters between the contacts, the foreign object is likely to fall along the semi-cylindrical movable side contact surface 2331a or the semi-cylindrical fixed side contact surface 2332a. In addition, by dividing the contact surface of the contact into two, even if a foreign object enters between one of the contact surfaces, electrical continuity between the movable side contact 2331 and the fixed side contact 2332 can be ensured between the other contact surface.

By configuring the detection mechanism 29 in this way, a single detection mechanism 29 can detect that all of the attachments (first attachment, second attachment) that make up the treatment unit are connected.

Next, modified examples of the detection mechanism will be explained using Figures 32 to 39.

As shown in FIG. 32, the detection mechanism according to the modified example has a plurality of connection detection switches (sw1 to sw4) arranged on the main body. In addition, at least one push rod (a1 to a4) is arranged on the first attachment, and at least one detectable protrusion (b1 to 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 to sw4).

In the illustrated example, the detection mechanism has four connection detection switches (sw1 to sw4). In this case, as shown in the table in Figure 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.

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 are 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."

Figures 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 Figure 34, the detection pattern is "11" in the table in Figure 33. In addition, in the case of the combination of the push rod and detectable protrusion shown in Figure 35, the detection pattern is "8" in the table in Figure 33. Furthermore, in the case of the combination of the push rod and detectable protrusion shown in Figure 36, the detection pattern is "3" in the table in Figure 33.

Figures 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 Figure 37, the detection pattern is "11" in the table in Figure 33. In addition, in the case of the combination of the push rod and detectable protrusion shown in Figure 38, the detection pattern is "8" in the table in Figure 33. Furthermore, in the case of the combination of the push rod and detectable protrusion shown in Figure 39, the detection pattern is "3" in the table in Figure 33.

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

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

The first attachment 31 has 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, for example, using a synthetic resin material.

The first case 310 is formed by joining together a number of sections, and a cavity is formed inside the first case 310 formed by joining the sections. The first treatment unit side gear mechanism 35, which will be described later, is housed inside this cavity.

Specifically, the first case 310 has a generally rectangular shape when viewed from the back, and includes an attachment case 311 that opens downward, and an attachment base 312 that is arranged to cover the opening of the attachment case 311. The attachment base 312 is fixed to the attachment case 311 by an attachment base fastening screw 3121.

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 that is attached to the main body 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 that is attached to the main body 20. When the first treatment unit 30 is attached to the main body 20, the top surface 3112a 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).

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, they are smoothly connected at the joint.

In addition, in this embodiment, the connecting portion between the main body 20 and the treatment unit is designed to have a flat surface. This allows for a smooth continuity at the connecting portion while making it easier to shape the other portions in a variety of shapes. In other words, this improves the design of the scalp care device 10, which is configured to allow multiple treatment units to be attached and detached, while also improving the design freedom of the main body 20 and the treatment units.

Furthermore, by making the joint 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 or a packing. In this embodiment, the main body 20 has a waterproof structure. In this way, for example, when taking a bath, the scalp care device 10 formed by attaching the first treatment unit 30 to the main body 20 can be used to wash the hair (scalp cleansing) and massage the scalp (scalp care).

The top wall 3112 is formed with a through hole 3112b that penetrates in the vertical direction, 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 (when the first attachment 31 is viewed from above in the vertical direction). This regular hexagonal (polygonal) space is formed to be approximately the same size as the outer diameter of the joint 261 of the main body side drive transmission part 26. When the first treatment unit 30 is attached to the main body 20, the joint 261 of the main body side drive transmission part 26 is inserted into this regular hexagonal (polygonal) space.

The top wall 3112 is also formed with a hook insertion recess 3112c into which the hook accommodating portion 2132 and 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 is formed within this hook insertion recess 3112c, which engages with the hook 28 when the first treatment unit 30 is attached to the main body 20.

The attachment case 311 (top wall 3112) shown in FIG. 43 is formed with a cleaning water inlet (water supply/drain port) 311h. This allows the inside of the first attachment 31 to be cleaned through the cleaning water inlet 311h when the main body 20 and the first attachment 31 are disconnected.

On the other hand, the attachment base 312 shown in FIG. 44 is formed with a cleaning drain port (water supply/drain port) 312h. 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.

Furthermore, the top wall 3112 is also formed with a through hole 3112e that penetrates 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, this 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. It is also possible to omit the biasing spring 342 by strengthening the spring property (biasing force) of the rubber switch button 234.

In addition, when the push rod 341 releases the connection detection switch 233 from its pressure for some reason while the motor 235 is running (when the first treatment unit 30 is removed from the main body 20), the motor 235 stops.

The first treatment unit gear mechanism 35 is arranged in the space inside the attachment case 311, which opens downward.

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, the 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.

The first treatment unit gear mechanism 35 also includes a drive transmission gear 353 that meshes with the gear portion 3521 and rotates around 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.

The first treatment unit gear mechanism 35 also has four output gears 354 that rotate around the vertical direction. In this embodiment, of the four output gears 354, the two output gears 354 closest to the joint gear 351 mesh with the gear portion 3521, and the two output gears 354 located 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.

Furthermore, a rotating base 355 is fixed to each of the four output gears 354. This rotating base 355 has an output shaft 3551 that protrudes upward from the center of the disk part, and an eccentric shaft 3552 that protrudes downward at a position eccentric from the center of the disk part. 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 rotating base fastening screw 3553. In this way, the output gear 354 and the rotating base 355 can be attached with the output gear bearing 3541 interposed between them.

In addition, in this embodiment, the attachment base 312 is interposed between the output gear bearing 3541 and the output gear 354. And, by forming four through holes 312a in the attachment base 312, the rotating base 355 attached to the output gear 354 is exposed below the attachment base 312 in a rotatable state.

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

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 opposite direction (counterclockwise). That is, the two rotating bases 355 closer to the joint gear 351 also rotate in the opposite direction (counterclockwise).

On the other hand, the two output gears 354 located far from the joint gear 351, i.e., the two rotating bases 355 located far from the joint gear 351, rotate in the above-mentioned one rotation direction (clockwise).

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 around the output shaft 3551. In other words, the eccentric shaft 3552 rotates along a plane (horizontal plane) perpendicular to the axial direction (up-down direction) of the output shaft 3551.

The second attachment 32 is detachably attached to the first attachment 31 configured in this way.

The second attachment 32 includes a second case 322 that is removably attached to the first attachment 31, and a rubber cover 321 that is attached to the second case 322.

The rubber cover 321 can be made of a flexible material such as an elastomer, and is sized to have approximately the same shape and size as the first attachment 31.

This rubber cover 321 is compressed vertically between the first attachment 31 and the second attachment 32, waterproofing the inside of the connection between the first attachment 31 and the second attachment 32 (see Figures 17 and 19).

In this manner, in this embodiment, the connecting portion between the first attachment 31 and the second attachment 32 is made waterproof, so that water is prevented from entering the inside.

A second case 322 made of a harder material than the rubber cover 321, which is made of a flexible member, is attached to this rubber cover 321.

Specifically, the second case 322 has mounting protrusions 3222 that protrude upward at approximately the center of each side. The mounting protrusions 3222 are fitted into mounting holes 3212 that are provided to penetrate the rubber cover 321 in the vertical direction at approximately the center of each side of the outer periphery of the rubber cover 321, thereby allowing the rubber cover 321 to be attached to the second case 322. At this time, the protrusions 3211 formed in the center of the rubber cover 321 and protruding upward are inserted and fitted into the engagement hooks 3221 formed in the center of the second case 322 and protruding downward (see FIG. 46).

In this way, by attaching the second case 322, which is made of a harder material than the rubber cover 321, to the flexible rubber cover 321, the second attachment 32 can be easily attached and detached to the first attachment 31. In addition, the part of the rubber cover 321 to which the second case 322 is not attached becomes the conforming deformation part 3213, and the massager base 323 is fitted into this conforming deformation part 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 parts of the rubber cover 321 corresponding to the four circular holes 3223 become the conforming deformation part 3213. That is, in this embodiment, the rubber cover 321 has four circular conforming deformation parts 3213 formed therein.

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

The massager base 323 is made of a resin or the like that is more rigid than the rubber cover 321, and is a member that is less likely to deform. The massager base 323 includes a base portion 3231 that is attached to the eccentric shaft 3552 of the rotating base 355, a core portion 3232 that protrudes downward from the lower surface of the base portion 3231, and a flange portion 372 that is connected to the outer edge of the base portion 3231. In this embodiment, each massager base 323 is provided with four core portions 3232.

The upper surface of the base portion 3231 is formed with an insertion hole 3231a, and the eccentric shaft 3552 of the rotating base 355 is inserted into this insertion hole 3231a so that the treatment element base 323 is attached to the rotating base 355. In this way, the following deformation portion 3213 is allowed to deform in accordance with the movement of the treatment element base 323.

As described above, in this embodiment, the eccentric shaft 3552 rotates on a circle centered on the output shaft 3551. In other words, the eccentric shaft 3552 rotates along a plane (horizontal plane) perpendicular to the axial direction (up-down direction) of the output shaft 3551.

Therefore, when the eccentric shaft 3552 rotates, the first massager (massager) 33 attached to each of the eccentric shafts 3552 also rotates around the output shaft 3551 in accordance with the rotation of the eccentric shaft 3552.

In this manner, in this embodiment, each first massager 33 rotates (orbits) along a plane (horizontal plane) perpendicular to the axial direction (up-down direction) of the output shaft 3551. Therefore, the shape of the path drawn when the first massager 33 is operated is a circumference centered on the output shaft 3551. Note that in this embodiment, the first massager 33 rotates while moving parallel to the horizontal plane.

In this embodiment, the four rotating bases 355 are arranged so that the eccentric shafts 3552 provided on adjacent rotating bases 355 in close positions (non-diagonal positions) rotate with a phase shift of 180 degrees. In this way, the eccentric shafts 3552 provided on adjacent rotating bases 355 in 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.

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 they approach, and two first massagers 33 that move in circles so as to move in the same direction when they approach. This makes it possible to perform pinch and twist massage of the scalp when the first massagers 33 are brought into contact with the scalp.

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 makes it possible to reduce the size of the first treatment unit 30.

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

The first massager 33 has a base 331 and a massage projection 332 that protrudes downward from the top surface (bottom surface) 331a of the base 331 and comes into contact with the scalp when the scalp care device 10 is in use.

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

In addition, in this embodiment, each of the four first massagers 33 has four massage protrusions 332, and the tip 3322 of each massage protrusion 332 has three small extension protrusions 33222.

Next, we will explain an example of how to use the first treatment unit 30 configured in this way.

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

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

The rotation of the gear portion 3521 and the drive transmission gear 353 causes the four output gears 354 to rotate at a reduced speed.

In this way, when the four output gears 354 rotate, the four rotating bases 355 connected to the four output gears 354 also rotate.

At this time, the eccentric shaft 3552 provided on each rotating base 355 rotates along a plane (horizontal plane) perpendicular to the axial direction (up-down direction) of the output shaft 3551.

Therefore, when the eccentric shaft 3552 rotates, the first massagers 33 attached to each of the eccentric shafts 3552 also rotate around the output shaft 3551 in accordance with the rotation of the eccentric shaft 3552. The treatment protrusions 332 provided on each of the first massagers 33 also rotate in response to the rotation of the first massagers 33. At this time, the treatment protrusions 332 rotate while moving parallel to the horizontal plane.

In this state, if the treatment protrusions 332 are brought into contact with the scalp, the rotating treatment protrusions 332 can be used to cleanse and massage the scalp (scalp care).

Below, an example of the operation for disconnecting an attachment in the first treatment unit is described using Figures 48 to 50.

Figure 48 shows the unloaded state. The rotating base 355, which is the connecting part, is fixed to the output gear 354 and rotates around the rotation axis RC. The treatment part base 323, which is the 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 part base 323 and the frame of the first attachment 31 (attachment base 312) are sufficiently secured. Similarly, the gaps G3 and G4 between the flange portion 372 of the treatment part base 323 and the frame of the second attachment 32 (second case 322) are also sufficiently secured.

Figure 49 shows the state when an appropriate load within a predetermined range is applied in the direction of arrow A1, such as during treatment using the scalp care device 10. When an appropriate load within a predetermined range is applied to the treatment protrusion 332 via the tip 3322 in the direction of 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 Figure 49, and the rotating base 355 does not tilt any further. At this time, the flange portion 372 of the treatment element base 323 does not interfere (contact) with the frame of the first attachment 31 (attachment base 312). Similarly, the flange portion 372 of the treatment element base 323 does not interfere (contact) with the frame of the second attachment 32 (second case 322).

Figure 50 shows the state when a load of a predetermined value or more is applied to the treatment base 323, such as when the treatment protrusion 332 comes into contact with a foreign object. The first attachment 31 and the second attachment 32 are engaged by at least one set of engagement parts (hook, hook insertion recess). When a load of a predetermined value or more is applied to the treatment base 323, the rotating base 355 slides at the tip of the eccentric shaft 3552 with point B1 shown in Figure 49 as the base point, and tilts further from the state shown in Figure 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 point B2 shown in Figure 50, and the engagement between the first attachment 31 and the second attachment 32 is released.

Here, as shown in Figures 51 to 53, in this embodiment, the eccentric shaft 3552 of the rotating base 355, which is the 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 part base 323, which is the 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 an approximately cone shape in this way, when a load of a predetermined value or more is applied to the treatment part base 323, the treatment part base 323 will slide 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 part base 323, the treatment part base 323, which is the connected part, can be made to come off the rotating base 355, which is the connecting part.

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 treatment part base 323 is inserted into the following deformation part 3213 formed on the rubber cover 321 having the treatment protrusion 332, and is disposed at the approximate center 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 treatment part 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 an approximately conical shape as described above, the insertion hole 3231a can play a guiding role when the eccentric shaft 3552 is inserted into the insertion hole 3231a.

In addition, as shown in FIG. 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.

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

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, point B3 on the tip side and 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 hemispherical surface 35522 and the convex 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, point B3 on the tip side and point B4 on the base end side, thereby maintaining smooth rotation.

In addition, 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 composed of one part, and this external exposed portion does not have any unevenness or the like that may catch and entangle the user's hair, clothing, etc. Furthermore, there is no gap formed around the rotating base 355 that may pinch the user's fingers, etc. That is, in this embodiment, the gap between the rotating base 355 and the through hole 312a of the attachment base 312 is a small gap, and it is possible to prevent the user's hair, clothing, etc. from being drawn in through the gap.

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 manner, it is possible to prevent damage to the scalp when the scalp care device 10 is brought into contact with the scalp with the second attachment 32 at the end having the treatment part detached. In addition, in this embodiment, the tip (lower end) of the eccentric shaft 3552 of the rotating base 355 is made approximately spherical. 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.

[An example of the second treatment unit]
Next, an example of the second treatment unit will be described with reference to Figures 54 to 61.

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

The first attachment 41 has 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, for example, using a synthetic resin material.

The first case 410 is formed by joining together a number of divided bodies, and a cavity is formed inside the first case 410 formed by joining together the divided bodies. The second treatment unit side gear mechanism 45, which will be described later, is housed inside this cavity.

Specifically, the first case 410 has a generally rectangular shape when viewed from the back, and includes an attachment case 411 that opens downward, and an attachment base 412 that is arranged 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.

The attachment case 411 includes a peripheral wall 4111 and a top wall 4112 that is connected to the upper end of the peripheral wall 4111. The peripheral wall 4111 has a shape that gradually expands in diameter from the upper end side, which is the side that is attached to the main body 20, toward the lower end side. The top wall 4112 is plate-shaped, and a flat top surface 4112a that extends horizontally of the top wall 4112 is the end surface on the side that 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) when the second treatment unit 40 is attached to the main body 20.

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, they are smoothly connected at the joint.

In addition, in this embodiment, the connecting portion between the main body 20 and the treatment unit is designed to have a flat surface. This allows for a smooth continuity at the connecting portion while making it easier to shape the other portions in a variety of shapes. In other words, this improves the design of the scalp care device 10, which is configured to allow multiple treatment units to be attached and detached, while also improving the design freedom of the main body 20 and the treatment units.

Furthermore, by making the joint 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 or a packing. In this embodiment, as described above, the main body 20 has a waterproof structure. In this way, for example, when taking a bath, the scalp care device 10 formed by attaching the second treatment unit 40 to the main body 20 can be used to wash the hair (scalp cleansing) and massage the scalp (scalp care).

The top wall 4112 is formed with a through hole 4112b that penetrates in the vertical direction, 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 (when the first attachment 41 is viewed from above in the vertical direction). This regular hexagonal (polygonal) space is formed to be approximately the same size as the outer diameter of the joint 261 of the main body side drive transmission part 26. When the second treatment unit 40 is attached to the main body 20, the joint 261 of the main body side drive transmission part 26 is inserted into this regular hexagonal (polygonal) space.

The top wall 4112 is also 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 is formed within this hook insertion recess 4112c, which engages with the hook 28 when the second treatment unit 40 is attached to the main body 20.

Furthermore, the top wall 4112 is also formed with a through hole 4112e that penetrates 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, this 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 strengthening the spring property (biasing force) of the rubber switch button 234, it is also possible to omit the biasing spring 442.

In addition, when the push rod 441 releases the connection detection switch 233 from being pressed by the push rod 441 for some reason while the motor 235 is running (when the second treatment unit 40 is removed from the main body 20), the motor 235 stops.

The second treatment unit gear mechanism 45 is arranged in the space inside the attachment case 411, which opens downward.

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 while extending in the vertical direction. In this embodiment, a second treatment unit side drive transmission part 452 is formed at the upper end of the joint gear 451, and a gear part 4521 is formed at the lower end of the joint gear 451. The second treatment unit side drive transmission part 452 and the gear part 4521 are formed integrally.

The second treatment unit gear mechanism 45 also includes a drive transmission gear 453 that meshes with the gear portion 4521 and rotates around 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.

The second treatment unit side gear mechanism 45 also has 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.

Furthermore, a rotating base 455 is fixed to each of the two output gears 454. This rotating base 455 has 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 rotating base fastening screw 4553. In this way, the output gear 454 and the rotating base 455 are attached with the output gear bearing 4541 interposed between them.

In addition, in this embodiment, the attachment base 412 is interposed between the output gear bearing 4541 and the output gear 454.

Specifically, the attachment base 412 has a pair of rotating base mounting plates inclined at approximately 15 degrees with respect to the horizontal plane, and each of these rotating base mounting plates has a rotating base accommodating recess 4121 formed therein. Furthermore, a through hole 4121a is formed in the rotating base accommodating recess 4121, through which the output shaft 4551 is inserted. 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.

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

First, when the coupling gear 451 rotates in one direction (e.g., clockwise), the drive transmission gear 453 rotates in the opposite direction (counterclockwise).

When the drive transmission gear 453 rotates in the reverse rotation direction (counterclockwise), the two output gears 454 rotate in the above-mentioned one rotation direction (clockwise). In other words, the two rotating bases 455 rotate in the above-mentioned one rotation direction (clockwise).

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 around the output shaft 4551. In other words, the eccentric shaft 4552 rotates along a plane perpendicular to the axial direction of the output shaft 4551.

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

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

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 the guide rail accommodation recess 4122 formed in the attachment base 412, the guide rail 46 is fixed to the attachment base 412 by inserting the 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 them facing each other across the rotating base 455.

The slide base 47 also includes a roughly 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.

By configuring it in this way, when the eccentric shaft 4552 is rotated, the main body 471 is pressed by the eccentric shaft 4552 and moves back and forth linearly along the rail portion 461.

The second attachment 42 is removably attached to the first attachment 41 configured in this way.

The second attachment 42 includes a second case 422 that is removably attached to the first attachment 41, and a rubber cover 421 that is attached to the second case 422.

The rubber cover 421 can be made of a flexible material such as an elastomer, and is sized to have approximately the same shape and size as the first attachment 41.

The second case 422, which is made of a harder material than the rubber cover 421, which is made of a flexible member, is attached to this rubber cover 421.

Specifically, mounting protrusions 4224 that protrude upward are provided along each side of the second case 422. The mounting protrusions 4224 are fitted into mounting holes 4212 that are provided to penetrate vertically along each side of the outer periphery of the rubber cover 421, thereby allowing the rubber cover 421 to be attached to the second case 422. At this time, a protrusion (not shown) formed on the rubber cover 421 and protruding upward is inserted and fitted into an engagement hook (not shown) formed on the second case 422 and protruding downward.

In this way, by attaching the second case 422 made of a harder material than the rubber cover 421 to the flexible rubber cover 421, the second attachment 42 can be easily attached and detached to the first attachment 41. In addition, the part of the rubber cover 421 to which the second case 422 is not attached is the conforming deformation part 4213, and the massager base 423 is fitted into this conforming deformation part 4213. In this embodiment, the second case 422 has a frame part 4221 and a crosspiece part 4222, and two rectangular holes are formed at positions symmetrical with respect to the center of the second case 422. The parts corresponding to the two rectangular holes in the rubber cover 421 are the conforming deformation part 4213. That is, in this embodiment, the rubber cover 421 is formed with two rectangular conforming deformation parts 4213.

The massager base 423 is made of a resin or the like that is more rigid than the rubber cover 421, and is a member that is less likely to deform. The massager base 423 includes a base portion 4231 that is attached to the main body portion 471 of the slide base 47, and a core portion 4232 that is provided so as to protrude downward from the lower surface of the base portion 4231. The massager base 423 also includes a pair of flange portions 4233 that are connected to the upper end of the base portion 4231. In this embodiment, nine core portions 4232 are provided on each massager base 423.

The base portion 4231 is formed with a slide base housing portion 4231a, and the treatment element base 423 is attached to the rotating base 455 by inserting the main body portion 471 of the slide base 47 into this slide base housing portion 4231a. In this way, the following deformation portion 4213 is allowed to deform in accordance with the movement of the treatment element base 423.

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.

Then, this rotational motion is converted into reciprocating linear motion by the guide rail 46 and the slide base 47.

Therefore, when the eccentric shaft 4552 rotates, the second massagers (massagers) 43 attached to each of the eccentric shafts 4552 perform reciprocating linear motion along a plane perpendicular to the axial direction of the output shaft 4551.

In this manner, in this embodiment, each second massager 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 massager 43 is operated is a straight line.

In this way, this embodiment is equipped with units (first treatment unit 30 and second treatment unit 40) that have treatment elements with different movements.

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).

In addition, in this embodiment, at least one of the multiple treatment elements 43 is connected to an output shaft 4551 that is inclined so that the tip faces the central axis of the second attachment 42 as the treatment section.

This makes it easier for the massager 43 to fit the convex curved surface of the scalp.

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 way, the eccentric shafts 4552 provided on each rotating base 455 rotate while approaching and moving away from each other. Therefore, the second massagers 43 attached to each eccentric shaft 4552 via the slide bases 47 perform reciprocating linear motion while approaching and moving away from each other.

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 members 43. This allows the second treatment unit 40 to be made smaller.

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

The second massager 43 has a base 431 and a massage projection 432 that protrudes downward from the top surface (bottom surface) 431a of the base 431 and comes into contact with the scalp when the scalp care device 10 is in use.

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

In addition, in this embodiment, each of the two second massagers 43 is provided with 13 massage protrusions 432, and the tip 4322 of each massage protrusion 432 has three small extension protrusions 4322c.

Next, we will explain an example of how to use the second treatment unit 40 configured in this way.

First, the second treatment unit 40 is attached to the main body 20, and the second treatment unit drive transmission part 452 is attached to the main body 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 drive transmission part 26.

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

Then, as the gear portion 4521 and the drive transmission gear 453 rotate, the two output gears 454 rotate at a reduced speed.

In this way, when the two output gears 454 rotate, the two rotating bases 455 connected to the two output gears 454 also rotate.

At this time, the eccentric shaft 4552 provided on each rotating base 455 rotates along a plane perpendicular to the axial direction of the output shaft 4551.

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

In this state, if the treatment protrusion 432 is brought into contact with the scalp, the treatment protrusion 432 moving back and forth in a straight line can be used to perform care (scalp care) such as washing and massaging the scalp.

Below, an example of the operation for disconnecting an attachment in the second treatment unit is described using Figures 58 to 61.

Figures 58 and 59 show the 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 part 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 storage part 4231a of the treatment part base 423, the slide base 47 is fitted and held between the pair of second parallel surfaces 4231b, 4231b of the treatment part base 423. In this way, when an appropriate load within a predetermined range is applied to the treatment protrusion 432 through the tip part 4322 in the direction of the arrow A2, the treatment part 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 part base 423.

60 and 61 show the state when a load of a predetermined value or more is applied to the treatment member base 423, such as when the treatment protrusion 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 member base 423, the second parallel surface 4231b of the treatment member 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 member base 423, which is the connected part, inclines with the end of the flange portion 4233 as the 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.

[Example of a stand]
Next, an example of a stand for placing the treatment unit will be described with reference to Figures 62 to 69.

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.

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 is a combination of the first attachment 41 and the second attachment 42, can be placed on the second stand 70.

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.

In this embodiment, the first treatment unit 30 placed on the first stand 60 can be placed on top of the second treatment unit 40 placed on the second stand 70 (see Figure 66).

In addition, in this embodiment, the second treatment unit 40 placed on the second stand 70 can be placed on top of the first treatment unit 30 placed on the first stand 60 (see Figure 67).

In other words, in this embodiment, the stacking order (upper-lower 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 switched up or down.

Furthermore, in this embodiment, as shown in Figures 68 and 69, the first stand 60 can be placed on 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 the first stand 60.

In addition, in this embodiment, although not shown, a second stand 70 can be placed on 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 the second stand 70.

In other words, in this embodiment, it is possible to attach either of the treatment units (first treatment unit 30, second treatment unit 40) to the main body 20 and store the scalp care device 10 in an assembled state.

[Action 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.

(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 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. Furthermore, the enclosure 21 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. The compressed parts 2141, 217 also 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.

In the scalp care device 10 shown in this 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 lid 2122, bottom plate 213), thereby waterproofing the inside of the enclosure 21 of the main body 20. In addition, since the first seal parts 2141a, 2171 and the second seal parts 2142, 2172 are integrally formed, there is no need to place seal members individually at each location, and it is possible to suppress the occurrence of waterproofing defects due to forgetting to install the seal members or installation variations.

In this way, the scalp care device 10 shown in the above embodiment and its modified example can prevent waterproofing problems caused by forgetting to install the sealing member or by installation variations at the fastening portion between the enclosure body and the fastened part.

(2) The compressed part (lower sealing member 217A) functions as a waterproof valve that prevents water from entering the enclosure 21 and as a relief valve that discharges gas generated within the enclosure 21 to the outside.

This allows the main body 20 to be made resistant to external pressure and easy to release gases or other substances that may be generated inside.

(3) The main body 20 is equipped with a main body side drive transmission part 26 having a hexagonal column-shaped joint 261. The treatment units (first treatment unit 30, second treatment unit 40) are equipped 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.

This allows the driving force of the motor 235 to be efficiently transmitted to the treatment units 30, 40 attached to the main body 20.

(4) The length L1 of the widest point on the tip surface 2611a of the joint 261 that intersects with the axial direction of the joint 261 is shorter than the length L2 of the opposite side of the hexagonal insertion hole 3522.

By doing this, even if the joint 261 of the main body 20 and the insertion hole 3522 of the treatment unit 30, 40 are out of phase with each other, the phase is corrected during insertion, and the joint 261 can be easily inserted into the insertion hole 3522.

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

By doing this, even if the joint 261 of the main body 20 and the insertion hole 3522 of the treatment unit 30, 40 are out of phase with each other, the phase is corrected during insertion, and the joint 261 can be easily inserted into the insertion hole 3522.

(6) The joint 261 has a flange portion 2616 formed at the base end of the joint 261. The flange portion 2616 of the joint 261 is pressed from the tip end side of the joint 261 by the joint pressing plate 27, so that the joint 261 is held relative to the enclosure 21.

This prevents the coupling 261 from falling off and allows the coupling 261 to be held in place relative to the enclosure 21 without impeding the transmission of the driving force from the electric motor 235.

(7) An output shaft 246 having a shaft-side D-cut surface 2461 at its tip is press-fitted into the joint 261.

This allows the first treatment unit side drive transmission part (treatment unit side drive transmission part) 352 to be attached to the main body side drive transmission part 26 in a state where free rotation is suppressed.

(8) The joint 261 has 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 2615a is formed on the inner D-cut surface 2615 of the joint 261 to vent air when the output shaft 246 is pressed in.

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.

[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.

For example, it is possible to create a scalp care device by appropriately combining the configurations shown in the above embodiment and its modified examples.

In addition, 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 with different motor performance and battery capacity. In other words, it is also possible for the scalp care device 10 to have multiple types of main body with a common main body drive transmission unit.

In addition, in the above embodiment and its modified example, a treatment unit having a treatment element that moves along a plane perpendicular to the axial direction of the output shaft is exemplified, but it is also possible to have 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 have 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.

In addition, in the above embodiment and its modified example, a treatment unit having a massager that rotates along a circle is exemplified, but it is also possible to use a treatment unit having a massager that rotates along an ellipse.

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

(1) That is, the scalp care device has a function of massaging the scalp. In a housing that contains parts that require waterproofing, the necessary waterproofing structure is provided for the screw part and the inner circumference of the enclosure by screwing and compressing an integrated sealing member between the molded product and the enclosure, providing a leak-proof waterproofing structure.

(2) The scalp care device described in (1) above is characterized by being provided with a scalp cleaning function.

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

The above-described embodiments are intended to illustrate the technology disclosed herein, and various modifications, substitutions, additions, omissions, etc. may be made within the scope of the claims or their equivalents.

The present disclosure is applicable to scalp care devices that can prevent waterproofing problems caused by forgetting to install or installing the sealing member unevenly at the fastening portion between the enclosure body and the fastened part. Specifically, the present disclosure is applicable to various scalp care devices, including those for home and commercial use.

10 scalp care device 20 main body 21 enclosure (housing)
26 Main body side drive transmission part 27 Joint pressing plate (separate component)
30 First treatment unit 40 Second treatment unit 211 Cylindrical wall portion (enclosure body)
217 Lower seal member (compressed part)
217A Lower seal member (compressed part)
232 Battery (power source)
235 Electric motors (motors, drive sources)
246 Output shaft 261 Joint 352 First treatment unit side drive transmission part 452 Second treatment unit side drive transmission part 2122 Main body cover (fastened part)
2141 Upper seal member (compressed part)
2141a First seal portion 2142 Second seal portion 2171 First seal portion 2172 Second seal portion 2461 Shaft side flat surface (shaft side D-cut surface)
2611a Tip surface 2613 Outer surface 2614 R portion 2615 Inner flat surface (inner D-cut surface)
2615a Air vent (groove)
2616 Flange portion 3522 Insertion hole R1 Diameter R2 Diameter

Claims (8)

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. 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. 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. 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. 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. 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. 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. 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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