WO2005094626A1

WO2005094626A1 - Hair washing device with a scratching unit

Info

Publication number: WO2005094626A1
Application number: PCT/KR2004/000761
Authority: WO
Inventors: Kook-Cheol Park
Original assignee: Kook-Cheol Park
Priority date: 2004-04-01
Filing date: 2004-04-01
Publication date: 2005-10-13

Abstract

The present invention provides a potable hair washing device which has a structure capable of massaging a scalp of a user, discharging water to his/her hair, and feeding a predetermined amount of shampoo for washing the hair, thus providing convenience to the user. The portable hair washing device, comprises a casing (10) having a casing head (11) with an open front and a handle (12) coupled to the casing head; a scratching unit provided in the open front of the casing head, the scratching unit comprising an embossment pad (20) and a support panel (22) attached on a rear surface of the embossment pad, with a plurality of embossments provided on a front surface of the embossment pad; and a vibrating unit (30) installed in the casing (10) to vibrate the scratching unit, having a motor (31) and an eccentric cam (32) provided on an output shaft of the motor and connected to the support panel of the scratching unit.

Description

POTABLE HAIR WASHING DEVICE

Technical Field

The present invention relates, in general, to a potable hair washing device and, more particularly, to a potable hair washing device which has structures capable of massaging ^" scalp, discharging water to hair, and feeding hair with predetermined amount of shampoo, thus providing convenience to users in washing hair.

Background Art Generally, hair washing is accomplished through a process comprising such steps as having hair wetted with water, applying shampoo to hair, rubbing hair using hands to form suds, and washing hair with water to remove the suds . In the process of washing hair, because a water discharging device, such as a hand shower, and a container of soap or shampoo are located separately from each other, users suffer some difficulties in locating the water discharging device and the container of soap or shampoo in blind by closing eyes. With the same reason, there are also difficulties for users to control the amount of shampoo to be used at one time. Further, in the conventional hair washing process, because the hands of the user are smeared with the suds, when users touch other objects, such as showers and faucets with the smeared hands, the objects are also smeared with the suds. Due to the suds smeared on such objects, users may slip them from their hands . Because the problems in the conventional hair washing process as mentioned in the above, particularly, in places such as beauty parlors or barbershops where lots of hairs of customers should be washed, it was very burdensome to apply or follow the conventional hair washing process. To overcome such problems as in the conventional hair washing process, a hair washing device was provided in Korean Utility Model Publication NO. 1990-0006215 (hereinafter "the conventional hair washing device"). As shown in FIGS . 1 and 2 , the conventional hair washing device includes a main casing 1, with a hollow part 3 defined in the main casing 1. The conventional hair washing device further includes first and second handles 2 and 2 ' which are respectively provided on both ends of the main casing 1, and a plurality of bristles 4 which are provided on a lower surface of the main casing 1 to be spaced apart from each other at regular intervals . The conventional hair washing device further includes a plurality of water discharging holes 5 which are respectively provided between the plurality of bristles 4 to communicate the hollow part 3 with the outside of the main casing 1. A tube 6 is coupled to an end of the first handle 2 to communicate with the hollow part 3, so that water is fed into the hollow part 3 through the tube 6. The water, fed into the hollow part 3, is_^ discharged to the outside of the main casing 1 through the plurality of water discharging holes 5 which are respectively provided between the plurality of bristles 4. The conventional hair washing device further includes a storing chamber 7 which is provided around the second handle 2 ' in the main casing 1 to store shampoo in the storing chamber 7. An openable lid 8 is provided on an upper end of the storing chamber 7 to maintain the state of storing the shampoo in the storing chamber 7. The conventional hair washing device further includes a shampoo discharging hole 9a which is provided on a lower surface of the storing chamber 7, and a control plate 9 which is provided over the shampoo discharging hole 9a to control the shampoo discharging hole 9a. The above- mentioned control plate 9 slides in a predetermined direction to open the shampoo discharging hole 9a, so that the shampoo, stored in the storing chamber 7, is discharged to the outside through the shampoo discharging hole 9a. However, in the conventional hair washing device, because the plurality of water discharging holes 5 are provided throughout the lower surface of the main casing 1, water is discharged to the outside through the water discharging holes 5 in an unnecessarily wide range. That is, water is even discharged to undesired regions that do not include the hair of the user. Therefore, the conventional hair washing device is problematic in that the clothes of the user are undesirably wet by the water discharged from the hair washing device during the hair washing process . Comparing with the conventional hair washing process, the conventional hair washing device is advantageous in that the hands of the user are not smeared with the water or suds generated by the shampoo. However, it still has some disadvantages in that the users must manually move the hair washing device to form the suds using their hands . In the conventional hair washing device, because the shampoo, stored in the storing chamber 7, falls down by its own weight through the shampoo discharging hole 9a while the control plate 9 opens the shampoo discharging hole 9a, it is unnecessary for the users to blindly search for the shampoo container with their hands during the hair washing process. However, the conventional hair washing device still has a problem in that the users must rely on their sense to control the amount of shampoo used at one time during the hair washing process .

Disclosure of the Invention

Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior arts, and an object of the present invention is to provide a potable hair washing device which prevents parts of a users ' body except for their hair from being wet by water discharged from the hair washing device during hair washing process, and which has a structure possible to appropriately control the amount of shampoo used at one time even when the users close their eyes during hair washing process, and which automatically massages the scalp and forms suds during hair washing process without scratching manually. In order to accomplish the above objects, the present invention provides a portable hair washing device, including a casing, having a casing head, with an open front provided on a front end of the casing head, and a handle combined to the casing head; and a scratching unit provided in the open front of the casing head. The scratching unit has an embossment pad and a support panel attached on a rear surface of the embossment pad, with a plurality of embossments provided on a front surface of the embossment pad. The hair washing device further includes a vibrating unit installed in the casing to vibrate the scratching unit. The vibrating unit has a motor, and an eccentric cam provided on an output shaft of the motor and connected to the support panel of the scratching unit.

Brief Description of the Drawings The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. 1 is a partially broken perspective view of a conventional hair washing device; FIG. 2 is a sectional view of the hair washing device of FIG. 1; FIG. 3a is an exploded perspective view of a potable hair washing device, according to a first embodiment of the present invention; FIG. 3b is an exploded perspective view of a hair washing device, according to a modification of the first embodiment of the present invention; FIG. 4 is a side sectional view of the hair washing device of FIG. 3b; FIG. 5 is a plan sectional view of the hair washing device of FIG. 3b; FIG. 6 is an exploded perspective view of a potable hair washing device, according to a second embodiment of the present invention; FIG. 7 is a side sectional view of the hair washing device of FIG. 6; FIG. 8 is a plan sectional view of the hair washing device of FIG. 6; FIG. 9a is a perspective view of a vibrating unit of the hair washing device according to the first embodiment of the present invention; FIG. 9b is a perspective view of a vibrating unit of the hair washing device according to the second embodiment of the present invention; FIG. 10 is a perspective view of a guide unit of the hair washing device of the present invention; FIG. 11a is an exploded perspective view of a water nozzle unit of the hair washing device of the present invention; and FIG. lib is an exploded perspective view of the water nozzle unit of FIG. 11a, in which a water nozzle is coupled to a water feed tube while being held in a water nozzle holder .

Best Mode for Carrying Out the Invention

Reference should now be made to the drawings , in which the same reference numerals are used throughout the different drawings to designate the same or similar components . As shown in FIGS 3a through 8, a potable hair washing device according to the present invention basically includes a casing 10, a scratching unit comprising an embossment pad 20 and a support panel 22, which is provided in a front end of the casing 10, and a vibrating unit 30 which is installed in the casing 10 to vibrate the scratching unit. The hair washing device may further include a water discharging means 40. FIG. 3a is an exploded perspective view of a potable hair washing device for a scalp, massage, according to a _* . first embodiment of the present invention. FIG. 3b is an exploded perspective view of a hair washing device having the water discharging means 40, according to a modification of the first embodiment of the present invention. FIG. 4 is a side sectional view of the hair washing device of FIG. 3b. FIG. 5 is a plan sectional view of the hair washing device of FIG. 3b. FIGS. 4 and 5 respectively correspond to a side sectional view and a plan sectional view of the hair washing device of FIG. 3a from which the water discharging means 40 is removed. As shown in FIG. 3a or 3b, the casing 10 comprises a casing head 11, with the open front provided on the front end of the casing head 11. The casing 10 further comprises a handle 12 which is integrally combined to the casing head 11. At this time, preferably, the casing head 11 and the handle 12 are integrally combined to each other into a single body. Of course, the handle 12 may be removably combined to the casing head 11. The casing 10 may define an I-shaped appearance, in which the casing head 11 and the handle 12 are combined to each other to be aligned in a straight manner, or an L- shaped appearance, in which the handle 12 and the casing head 11 are arranged to be angled with each other. As described above, in the hair washing device of the present invention, it is possible to variously change the appearance of the casing 10. In the meantime, the scratching unit vibrates on the open front of the casing head 11 to massage the scalp of a user, and, simultaneously, form suds of shampoo. The scratching unit comprises the embossment pad 20 and the support panel 22. The embossment pad 20 has a plurality of embossments 21 on a front surface. The plurality of embossments 21 are made of soft or hard plastic material. The hair washing device with the plurality of embossments 21, made of the soft plastic material, is preferably used for a user with a relatively poor scalp, like a child and an old man. The support panel 22 is attached on a rear surface of the embossment pad 20 of the scratching unit. Typically, the support panel 22 is preferably made of a hard plastic material to support the embossment pad 20 thereon. In the meantime, the vibrating unit 30 is installed in the casing 10 to vibrate the embossment pad 20, which is coupled to the support panel 22, as shown in FIGS. 4, 5 and 9a. The vibrating unit 30 includes a motor 31 to generate a rotating force, and an eccentric cam 32 which is mounted to the motor 31 and connected to the support panel 22 of the scratching unit. Thus, the embossment pad 20 along, with the support panel 22 vibrates by the vibrating unit 30. The detailed construction of the vibrating unit 30 according to the first embodiment is as follows with reference to FIG. 9a. The vibrating unit 30 includes the motor 31 which is installed in the casing 10, and the eccentric cam 32 which is provided on an output shaft 31a of the motor 31. The vibrating unit 30 further includes a connecting arm 33 to receive in an inside end thereof the eccentric cam 32, and a connecting rod 34 which is provided on an outside end of the connecting arm 33 and connected to the support panel 22 of the scratching unit. The motor 31 is connected to an external power source (not shown) through an electric wire w, so that the motor 31 is driven by electricity supplied from the external power source through the electric wire w. The handle 12 of the casing 10 has on a predetermined portion thereof a power switch MS to control the electricity supplied to the motor 31. Power is supplied to the motor 31 through the electric wire w, so that the motor 31 is driven. As shown in FIG. 9a, the eccentric cam 32 is eccentrically mounted to the output shaft 31a of the motor 31 to rotate along with the output shaft 31a. The eccentric cam 32 is rotatably received in the inside end of the connecting arm 33, with a bearing 33a interposed between the eccentric cam 32 and the connecting arm 33. The connecting rod 34 is provided on the outside end of the connecting arm 33 to transmit a vibrating force from the connecting arm 33 to the scratching unit. To achieve the above-mentioned operational function of the connecting rod 34, the connecting rod 34 extends from the outside end of the connecting arm 33 to the rear surface of the support panel 22 of the scratching unit. Due to the above-mentioned construction of the vibrating unit 30, the rotating force of the motor 31 is converted into the vibrating force of the scratching unit. That is, during a rotation of the motor 31, the eccentric cam 32 is eccentrically rotated by the rotating force of the motor 31. By the eccentric rotating motion of the eccentric cam 32, both the connecting arm 33 and the connecting rod 34 reciprocate. Thus, the scratching unit linearly reciprocates by the reciprocating motion of the connecting rod 34. As shown in FIG. 3b, the hair washing device according to the modification of the first embodiment of the present invention includes the water discharging means 40 to discharge water from the open front of the casing head 11 in which the embossment pad 20 of the scratching unit is provided. The water discharging means 40 comprises a water nozzle unit 41 and a water feed tube 45. The water nozzle unit 41 discharges forward the water, fed to the nozzle unit 41 through the water feed tube 45, to the outside of the casing 10. The water nozzle unit 41 has a water nozzle 42 to discharge the water, and a water nozzle holder 43 to support the water nozzle 42 thereon. At this time, the water nozzle 42 is provided in the open front of the casing head 11 at a predetermined position within a range that does not interfere with the vibrating motion of the scratching unit. The water nozzle holder 42 may be installed in the casing 10 at any position within a range that is possible to hold the water nozzle 42. As described above, the water nozzle 42 is provided in the open front of the casing head 11 while being mounted to the water nozzle holder 42 which is installed in the casing 10. Preferably, the water nozzle 42 is removably mounted to the water nozzle holder 42, as shown in FIGS. 11a and lib. In the hair washing device according to the modification of the first embodiment, the one scratching unit, having a size corresponding to an area of the open front of the casing head 11, is provided on the open front of the casing head 11. The detailed construction of the hair washing device according to the modification of the first embodiment including both the scratching unit and the water nozzle 42 will be described herein below. As shown in FIG. 3b, first and second through holes 20a and 22a, respectively having predetermined sizes, are provided on central portions of the embossment pad 20 and the support panel 22. The water nozzle 42 is positioned in both the first and second through holes 20a and 22a while being mounted to the water nozzle holder 43. Thus, the water nozzle 42 is exposed to the outside of the scratching unit while the water nozzle 42 does not interfere with the vibrating motion of the scratching unit. As described above, to ensure the vibrating motion of the scratching unit, each of the first and second through holes 20a and 22a is spaced apart from the water nozzle 42 at a predetermined interval . As shown in FIG. 4, the water feed tube 45, which is provided in the casing 10 to feed water to the water nozzle 42, preferably comprises a soft tube to achieve flexibility thereof. The water feed tube 45 extends from the casing 10 to an external water pipe of a water source. Preferably, a tube cock 46 is provided on an external end of the water feed tube 45, so that the water feed tube 45 is rotatably coupled to the external water pipe. In the hair washing device of the present invention, a water switch WS is provided on a predetermined portion of the handle 12 of the casing 10. The water switch WS is connected to a valve 47 provided on the water feed tube 45 to control supply of the water. That is, when the user pushes the water switch WS, the water switch WS is turned on. Thus, the water is fed to the water nozzle while the valve 47 opens the water feed tube 45. When the user pushes the water switch WS a second time, the water switch WS is turned off. Therefore, the supply of the water is stopped while the valve 47 closes the water feed tube 45. FIG. 6 is an exploded perspective view of a potable hair washing device, according to a second embodiment of the present invention. In the hair washing device of the second embodiment, the embossment pad 20 provided in the open front of the casing head 11 is divided into two parts. The support panel 22 to support the embossment pad 20 thereon is also divided into two parts, so that the two divided support panels 22' and 22" are respectively attached on rear surfaces of the two divided embossment pads 20' and 20" . At this time, the water nozzle 42 is provided on a central portion of the open front of the casing head 11 on which the two divided scratching units, comprising the two divided embossment pa^'ds 20' and 20" and the two divided support panels 22' and 22", are provided. The water nozzle 42 is positioned within the range that does not interfere with the vibrating motion of the scratching unit. The water nozzle 42 of the second embodiment is supported on a water nozzle holder 43 in the same manner as that described for the hair washing device of the first embodiment . As described above, in the hair washing device according to the second embodiment, the two divided scratching units are provided on the open front of the casing head 11. Therefore, the hair washing device of the second embodiment includes a vibrating unit 30 having a construction, different from the vibrating unit 30 of the first embodiment, to vibrate both the two divided scratching units. The construction of the vibrating unit 30 included in the hair washing device of the second embodiment will be described herein below. As shown in FIG. 9a, the vibrating unit 30 of the second embodiment includes a motor 31 to generate a drive force, and two eccentric cams 32 and 32' which are coaxially_^ and eccentrically provided on a front portion and a rear portion of an output shaft 31a of the motor 31, respectively. The vibrating unit 30 further includes two connecting arms 33 and 33' to respectively receive in inside ends of the two connecting arms 33 and 33' the two eccentric cams 32 and 32', with bearings 33a and 33a' interposed between the two eccentric cams 32 and 32' and the two connecting arms 33 and 33', respectively. The vibrating unit 30 further includes two connecting rods 34 and 34' which are respectively provided on outside ends of the two connecting arms 33 and 33 ' . The two connecting rods 34 and 34' are respectively connected to the two divided support panel 22 and 22 ' . That is, the hair washing device according to the second embodiment includes the two eccentric cams 32 and 32', the two connecting arms 33 and 33' and the two connecting rods 34 and 34' to correspond to the divided two scratching units, different from the hair washing device of the first embodiment having the single scratching unit. The two scratching units of the second embodiment are separately vibrated on the open front of the casing head 11 by the single motor 31. The operation of the hair washing device according to the second embodiment, in that the rotating force of the motor 31 is converted into the vibrating force of each of the scratching units, remains the same as the first embodiment, and further explanation is thus not deemed necessary. In the meantime, the hair washing device of each of the first and second embodiments further includes a sealing unit 13 which is provided between the scratching unit and the casing head 11. The sealing unit 13 flexibly connects the scratching unit to the casing head 11 to allow the scratching unit to smoothly vibrate on the open front of the casing head 11. Particularly, the sealing unit 13 seals a space defined between the scratching unit and the casing head 11. Therefore, the sealing unit 13 is preferably made of a soft elastic material or rubber. In case that the sealing unit 13 is made of a hard material, the sealing unit 13 may interfere with the vibrating motion of the scratching unit, and may cause noise during the vibration of the scratching unit.

Therefore, it is not preferable to make the sealing unit 13 with the hard material . In the hair washing device with the scratching unit of the single body according to the first embodiment, the sealing unit 13, made of the soft elastic material, is coupled around an outer edge of the scratching unit to surround the scratching unit therein. In the hair washing device with the two scratching units according to the second embodiment, the sealing unit 13 is coupled around outer edges of the two scratching units to surround the two scratching units. Furthermore, the sealing unit 13 of the second embodiment seals the space defined between the two scratching units. At this time, the water nozzle 42, mounted to the water nozzle holder 43, is exposed to an outside of the sealing unit 13, thus discharging water to the outside of the casing 10 without any obstacle. At this time, in the hair washing device according to each of the first and second embodiments, as shown in FIGS. 3a, 3b and 6, the embossment pad 20, the support panel 22 and the sealing unit 13 are in close contact with each other to enhance the sealing ability of the sealing unit 13. Furthermore, the embossment pad 20 of each of the first and second embodiments has a rim 23 which is provided around the edge of the embossment pad. The embossment pad, the support panel 22 and the rim 23 are coupled to each other through a plurality of bolts (designated by the reference character "s" in the drawings) . As shown in FIGS. 3a, 3b 6 and 10, the hair washing device of the present invention further includes a guide unit 50 to allow the scratching unit to smoothly vibrate on the open front of the casing head 11. The guide unit 50 includes a moving guide 51 and a stationary guide 52. The moving guide 51 comprises a moving rod part 51a which has a predetermined length and is attached on the rear surface of the support panel 22, and a sliding groove 51b which is provided on an end of the moving rod part 51a. The moving guide 51 is moved along with the scratching unit during the vibration of the scratching unit. The stationary guide 52 comprises a stationary rod part 52a which has a predetermined length and is projected from the interior of the casing to the open front of the casing head 11, and a sliding rail 52b which is provide on an end of the stationary rod part 52a. The sliding groove 51b of the moving guide 51 engages with the sliding rail 52b of the sliding guide 52, so that the scratching unit smoothly vibrates on the open front of the casing head 11. Preferably, a gel type lubricant is applied between the sliding groove 51b and the sliding rail 52b for a more smooth movement of the moving guide unit 51 on the stationary guide unit 52. In the meantime, the hair washing device of the present invention further includes a shampoo feed unit 60 which is provided in a predetermined position of the casing 10 to inject shampoo onto the hair of the user during a hair washing operation. The shampoo feed unit 60 has a shampoo storing chamber 61 with a predetermined volume, and a shampoo injection unit 62 which is provided under the shampoo storing chamber 61. The shampoo injection unit 62 is to inject the shampoo, discharged from the shampoo storing chamber 61 in front of the shampoo injection unit 62 by a weight of the shampoo, to the outside of the scratching unit. The shampoo injection unit 62 comprises a push tip 63 which is provided on a front end of the shampoo injection unit 62 to push the shampoo discharged from the shampoo storing chamber 61, and a push rod 65 which is provided on the back of the push tip 63, with a pusher 64 provided on a rear end of the push rod 65. A part of a rear portion of the pusher 64 is projected to the outside of the casing 10. The shampoo injection unit 62 further comprises a spring 67 which is elastically interposed between the end of the push rod 65 and a stopper 66, which^" is formed on a predetermined portion of a path in which the push rod 65 slides. By the spring 67, the push tip 63, the push rod 65 and the pusher 64 are elastically returned to original positions thereof. That is, when the user pushes the pusher 64 during the hair washing process, the predetermined amount of shampoo is injected to the outside of the scratching unit, thus being fed to the hair of the user. Thereafter, the user releases the pusher 64, so that the push tip 63, the push rod 65 and the pusher 64 are elastically returned to the original positions thereof by a restoring force of the spring 67. In the meantime, each of the electric wire w to supply the electric power to the vibrating unit 30 and the water feed tube 45 to feed water to the water discharging means 40 extends from a lower end of the handle 12 of the casing 10 to the outside of the handle 12 by a predetermined length. The electric wire w and the water feed tube 45 may independently extend to the outside of the casing 10. However, to prevent the electric wire w and the water feed tube 45 from being entangled or undesirably twisted to each other, both the electric wire w and the water feed tube 45 are preferably covered with a predetermined covering to form a single line, as shown in FIGS. 4 and 7. A typical plug, inserted into a typical plug socket, may be directly coupled to an end of the electric wire w. In the ha^'ir washing device of the present invention which may be frequently in contact with water, as shown in FIGS. 4 and 7, an insulating plug PI, which is made of an insulating material, and in which a power terminal is placed, is preferably used to prevent safety hazards from being happen. The insulating plug PI is connected to a power cord P2 of an adaptor A, inserted into the plug socket, so that the power terminal is prevented from being exposed to the outside of the plug, thus reducing the danger of being in contact with water.

Industrial Applicability As described above, in the present invention, because a scratching unit and a water nozzle unit are independently operated without interfering with each other, water discharged from the water nozzle unit is not undesirably dispersed during the hair washing process . Thus , the present invention prevents the water discharged from the water nozzle unit from being undesirably splashed. The present invention also prevents undesired parts of users' body from being wet by water discharged during a hair washing process. Moreover, because the hair washing device of the present invention automatically executes the hair washing and scalp massaging processes only by placing it on hair, it efficiently assists persons who have some problems with one of their arms in washing hair by themselves . In addition, in using the hair washing device of the present invention, it is possible to appropriately control the amount of shampoo to be used at one time. The hair washing device of the present invention can also be used to infiltrates medicine for alopecia or a poor scalp condition to the hair or scalp during the hair washing process . Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

1. A portable hair washing device, comprising: a casing having a casing head with an open front and a handle combined to the casing head; a scratching unit provided in the open front of the casing head, the scratching unit comprising an embossment pad and a^" support panel attached on a rear surface of the embossment pad, with a plurality of embossments provided on a front surface of the embossment pad; and a vibrating unit installed in the casing to vibrate the scratching^' unit, having a motor and an eccentric cam provided on an output shaft of the motor and connected to the support panel of the scratching unit.

2. The hair washing device according to claim 1, further comprising the first and second through holes respectively provided on predetermined portions of the embossment pad and the support panel of the scratching unit; a water nozzle unit installed in the casing head at a predetermined position within a range that does not interfere with the vibrating motion of the scratching unit; and a water feed tube coupled to the water nozzle unit to feed water to the water nozzle unit.

3. The hair washing device according to claim 1, wherein the casing defines an I-shaped or L-shaped appearance .

4. The hair washing device according to claim 1, further comprising a sealing unit provided .between the scratching unit and the casing head to seal a space defined between the scratching unit and the casing head, the sealing unit being made of a soft material so that the sealing unit does not interfere with the vibrating motion of the scratching unit.

5. The hair washing device according to claim 1 , wherein the scratching unit comprising the embossment pad and the support panel and provided in the open front of the casing head is divided into two parts.

6. The hair washing device according to claim 5 , further comprising a water nozzle unit provided in the casing head so that a desired part of the water nozzle unit is exposed to an outside of the scratching unit through a space between the two parts of the scratching unit.

7. The hair washing device according to claim 5 or 6, further comprising two eccentric cams coaxially provided on a front portion and a rear portion of the output shaft of the motor, respectively; two connecting arms to respectively receive in inside ends thereof the two eccentric cams, with bearings interposed between the two eccentric cams and the two connecting arms, respectively; and two connecting rods respectively provided on outside ends of the two connecting arms, the two connecting rods being respectively connected to the two parts of the support panel .

8. The hair washing device according to claim 2 or 6, wherein the water nozzle unit comprises a water nozzle provided in the open front of the casing head at a predetermined position within a range that dose not interfere with the vibrating motion of the scratching unit; and a water nozzle holder provided in a predetermined portion of the casing to support the water nozzle thereon.