Blade assembly and combination of blade assembly and handheld dermabrasion device

Abstract

The present application relates to a blade assembly and a combination of the blade assembly and a handheld dermabrasion device. The blade assembly includes a blade holder having a nose portion at only one end of the blade holder and an upper support surface extending away from the nose portion in a rearward direction, the blade holder having a first blade holder side and a second blade holder side; a blade carried by the blade holder, the blade being disposed at a lower portion of the blade holder, the blade having a cutting edge, a first blade side and a second blade side, the first blade side and the second blade side being disposed adjacent to the cutting edge; a safety cage fixed above the first blade side and the second blade side; and a pair of parallel aligned slots including a first slot and a second slot, the first slot being disposed along the first blade holder side and below the upper support surface, the second slot being disposed along the second blade holder side.

Description

[0001] Divisional Application Information

[0002] This application is a divisional application of the invention patent application with the application date of December 20, 2016, application number 201680082280.2, and invention name “Handheld dermabrasion device and dermabrasion method”.

[0003] CROSS-REFERENCE TO RELATED APPLICATIONS

[0004] This application is a national phase filing of International Application No. PCT / US2013 / 058708 filed on September 9, 2013 under 35 U.S.C. 371, and a continuation-in-part of U.S. Patent Application No. 14 / 062,262 filed on October 24, 2013, which is also a pending application, and a continuation-in-part of U.S. Patent Application No. 14 / 742,881 filed on June 18, 2015. Technical Field

[0005] The present invention relates to a handheld device and method for use in treating facial skin, and more particularly to a handheld microdermabrasion device for exfoliating facial skin that is safe for use by non-professionals, and a method for microdermabrasion of facial skin. Background Art

[0006] Various techniques are known for treating facial skin. These techniques are known to include handheld devices and fall into several categories:

[0007] Shaving

[0008] Cleansing and moisturizing

[0009] Dermabrasion

[0010] Microdermabrasion (peeling)

[0011] Debridement

[0012] Shaving is used to remove facial hair with the aid of a razor. In addition to standard safety razors, U.S. Patent No. 3,509,626 and Russian Patent RU 2320476 disclose safety razors with piezoelectric crystals attached to the blades for vibrating the blades at ultrasonic frequencies during shaving. These devices include a safety razor, a piezoelectric crystal, a battery, and a circuit for coupling the battery to the piezoelectric crystal. These devices are used to remove excess hair from a person's face without removing any skin. Such devices are configured for use by non-professionals.

[0013] In addition to manual treatment, cleaning and moisturizing can be achieved with the aid of a handheld device. For example, U.S. Patent Application Publication No. US 2005 / 0043653 A1 and U.S. Patent Nos. 5,931,859 and 6,119,035 disclose handheld devices for dispensing liquid to a person's face. These devices include a cleaning mode that applies a microcurrent to clean the skin. U.S. Patent Application Publication No. US 2008 / 0139974 A1 discloses a handheld device for applying only moisturizing liquid to a person's face. An example of this device is also disclosed at: voutube.com / watch? v= W1PcSf253cs.

[0014] Other handheld devices for cleaning facial skin that rely on ultrasonic frequencies are known. Examples of these devices are disclosed in: Japanese Patent No. JP20000060427; Korean Patent Nos. KR 20040022550 and KR20080006875. Additional examples of such devices can be found at: youtube.com / watch? NR=l&v=jypKIrpGDIg&feature=fvwp; youtube.com / watch? v=fmSS2uexmac and http: / dermasonic.com / how.html. Such devices are also configured for use by non-professionals.

[0015] Dermabrasion is a cosmetic surgical procedure used to remove the outer layer of skin by grinding the skin with fine sandpaper or a wire brush to remove scars or other blemishes. This procedure is used to grind the skin down to the dermis. The dermis is a layer of skin between the epidermis and the subcutaneous tissue, which is composed of connective tissue and relieves the body from stress and strain. Dermabrasion usually requires anesthesia and is usually performed by a medical professional (e.g., a dermatologist). Due to the possibility of infection and scarring, dermabrasion is a relatively unpopular choice for facial skin treatment.

[0016] Handheld devices for performing dermabrasion are known. Exemplary handheld devices for dermabrasion are disclosed and described in detail in the following: U.S. Patent No. 8,052,662 and U.S. Patent Application Publication Nos. US2003 / 0233085 A1, US 2004 / 0185067 A1, US 2007 / 0293795 A1, US 2009 / 0048557 A1, US 2009 / 0124985 A1, and US 2013 / 0144280 A1. Generally speaking, such devices include an applicator with an abrasive applied to a surface.

[0017] The applicator is attached to a piezoelectric crystal for vibrating the applicator at ultrasonic frequencies. The vibrating applicator is applied to the area of ​​the face of concern. U.S. Patent No. 7,384,405 discloses a handheld device comprising a rotating brush with abrasive bristles. Handheld dermabrasion devices are known that can be used by professionals and non-professionals.

[0018] Debridement is a surgical technique performed by a medical practitioner to remove unhealthy tissue (e.g., necrotic (i.e., dead), infected, damaged, contaminated tissue) or in the case of removing foreign bodies in tissue. U.S. Patent Application Publication No. US 2012 / 0101512 A1 discloses a known handheld device for debridement. The device includes a blade carried by a handle. The blade is a small, blunt flat blade that is operable to wipe necrotic tissue away from a tissue site without harming any of the healthy tissue located adjacent to the necrotic tissue. A piezoelectric crystal is attached to the blade to cause the blade to vibrate at ultrasonic frequencies. This debridement device is for professional use only.

[0019] Microdermabrasion is a relatively simple and safe and relatively popular process for exfoliating the epidermis (i.e., the outer layer of cells in the skin) and removing fine hairs (i.e., peach fuzz) from the skin. Microdermabrasion is a process that is usually performed by practicing skin care professionals (e.g., estheticians) because of the use of a scraper or similar blade. Using the scraper and a delicate touch, the scraper is swept across the skin in light feathering strokes to exfoliate the skin. Exfoliation involves removing old, dead skin cells on the outermost surface of the skin.

[0020] Microdermabrasion of facial skin has many benefits. For example, removing the epidermal skin allows skin care products to penetrate more easily into the deeper layers of the skin for better results. As mentioned above, microdermabrasion removes fine hair, which tends to cause accumulation of dirt and oil in the hair follicles. The removal of fine hair results in healthier looking skin.

[0021] Handheld devices for microdermabrasion typically include a surgical style scraper consisting of a blade and a handle. Such scalpels are not available for use by non-professionals. Thus, microdermabrasion is only available in spas that have professionals who perform skin care. Such microdermabrasion treatments at spas can be relatively expensive. Unfortunately, there are no known microdermabrasion devices known for home use by non-professionals. Therefore, there is a need to provide a handheld device and method for microdermabrasion for use by non-professionals that overcomes this problem. Summary of the invention

[0022] Briefly, the present invention relates to a method and handheld device for resurfacing facial skin that is relatively safe for use by non-professionals. The handheld device includes a blade assembly that includes a blade, a blade holder, and a safety cage that is removably mounted to a housing. The safety cage limits the depth to which the blade can penetrate the skin, which makes the device safe for use by non-professionals. Various embodiments of the handheld resurfacing device are contemplated. In one embodiment, a piezoelectric crystal is used to vibrate the blade assembly at an ultrasonic frequency. In an alternative embodiment, a motor driving an eccentric load can be used to vibrate the blade assembly at other frequencies. In yet another alternative embodiment, a motor with an eccentric load and a piezoelectric crystal are selectively and alternatively used to vibrate the blade assembly. In an embodiment that includes a motor, the motor speed can optionally be adjusted to enable the vibration frequency to vary. A resurfacing process that can be used by non-professionals is also disclosed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] These and other advantages of the present invention will be readily understood with reference to the following description and accompanying drawings, in which:

[0024] Figure 1 is a side elevation view of an exemplary microdermabrasion device including a vibration generator including a piezoelectric crystal and a motor with an eccentric load, according to one embodiment of the device.

[0025] Figure 2 is Figure 1 An exploded view of one embodiment of the microdermabrasion device described in FIG.

[0026] Figure 3 is Figure 1 A side elevation view in cross section of the microdermabrasion device illustrated in FIG.

[0027] Figures 4A-4D is an exemplary schematic diagram of a 4-phase rotary electrical switch for use with the present invention, wherein Figure 4A Public closing position; Figure 4B Describe the location in ultrasound mode; Figure 4C Indicates the intermediate off position, and Figure 4D Illustrate the sound wave pattern.

[0028] Figure 5 is used for Figure 3 An exemplary schematic diagram of a microdermabrasion device illustrated in , illustrating an embodiment comprising a piezoelectric crystal, a motor with an eccentric load, and an optional rheostat for controlling the speed of the motor.

[0029] Figure 6 It is used for Figure 5 A top view of an exemplary printed circuit board used with the embodiments described in FIG.

[0030] Figure 7 Similar to Figure 1 , but without thumb wheel.

[0031] Figure 8 is an exploded view of an alternative embodiment of a dermabrasion device containing only piezoelectric crystals.

[0032] Fig. 9 is Figure 8 A side elevation view in cross section of the microdermabrasion device illustrated in FIG.

[0033] Fig.10 yes Figure 8 An exemplary schematic diagram of the microdermabrasion device described in .

[0034] Fig.11 It is used for Figure 8 An exemplary printed circuit board for use with the microdermabrasion device described in .

[0035] Fig.12 is an exploded view of another alternative embodiment of a microdermabrasion device comprising only a motor and an eccentric load.

[0036] Fig.13 is Fig.12 A side elevation view in cross section of the microdermabrasion device illustrated in FIG.

[0037] Fig.13A Is a description of the removable blade in Fig.12 An alternative embodiment of the device described in .

[0038] Fig. 13B , 13C and 13D illustrate the manner in which a removable blade is attached to the scraper.

[0039] Fig.13E is a side elevation view illustrating a removable blade attached to a scraper.

[0040] Fig.13F Similar to Fig.13E , but illustrates a removable blade removed from the scraper.

[0041] Figure 13G yes Fig.12 Another alternative embodiment of the device described in .

[0042] Fig.14 yes Fig.12 An exemplary schematic diagram of the microdermabrasion device described in .

[0043] Fig.15 It is used for Figure 1 An exemplary printed circuit board for use with the microdermabrasion device described in .

[0044] Fig.16is a partial side elevation view of a dermabrasion device according to the present invention illustrating a removable blade attached to a handle portion of a housing.

[0045] Fig.16A is an enlarged partial view illustrating a safety cage and a blade of an exemplary blade assembly.

[0046] Fig.17 is a partial isometric view illustrating an exemplary blade assembly having a blade cage.

[0047] Fig.18 is a partial isometric view showing an exemplary blade assembly removed from the handle portion of the housing, illustrating an exemplary bayonet-type interface.

[0048] Fig.19 A partial isometric view illustrating a person using a microdermabrasion device according to the present invention.

[0049] Fig. 20 is a diagram of a face with arrows illustrating the direction of stroke of a microdermabrasion device on a user's face.

[0050] Fig.21 yes Figure 1 A side elevation view of an alternative exemplary embodiment of the exemplary microdermabrasion device illustrated in FIG. 1 , shown at exemplary dimensions and showing a blade assembly mounted therein.

[0051] Fig. 22 yes Fig.21 A partial enlarged view of the microdermabrasion device described in FIG.

[0052] Fig.23 yes Fig.21 A top view of the microdermabrasion device illustrated in FIG. 1 , which is also shown at exemplary dimensions.

[0053] Fig.24A is shown with the blade assembly removed in Figure 21-23 Side elevation view of the microdermabrasion device illustrated in FIG.

[0054] Fig. 24B Similar to Fig.24A , which is shown with the dermabrasion device inverted to illustrate the guide rails on the dermabrasion device for slidably receiving the blade assembly.

[0055] Fig.25A The demonstration is carried by a demonstration portable stand Fig.21 Isometric view of a microdermabrasion device illustrated in.

[0056] Fig.25B yes Fig.25A Isometric view of the portable stand illustrated in .

[0057] Fig.26 yes Fig.25B An isometric view of the microdermabrasion device and portable stand illustrated in , shown with a tip on its side to illustrate the base and power connections of the portable stand.

[0058] Fig.27A illustrate Fig.21 An enlarged partial front view of the microdermabrasion device illustrated in , showing the blade inserted and the housing removed.

[0059] Fig.27B yes Fig.21 A more detailed front view of the microdermabrasion device illustrated in FIG. 1, showing the microdermabrasion device with the housing removed and mounted on Fig.25B In the portable stand illustrated in the drawings, the table showing the component parts is associated with the figure numbers in the circle.

[0060] Fig.28 The illustration shows an exemplary blade assembly including a blade, a blade holder, and a safety cage.

[0061] Fig.29 It is used to store Fig.28 A top view of an exemplary blade stop used in the additional blade assembly process described in .

[0062] Fig.30 yes Fig.29 A front elevation view of the blade stop illustrated in FIG.

[0063] Fig.31 yes Fig.29 A side elevation view of the blade stop illustrated in FIG.

[0064] Fig.32 yes Fig.21 An exemplary electrical schematic diagram of the microdermabrasion device illustrated in FIG.

[0065] Fig.33 is used for Fig.21 An exemplary software flow chart of an exemplary microdermabrasion device illustrated in FIG.

[0066] Fig.34 is a side elevation view of an exemplary vibration generator for use with the present invention.

[0067] Fig.35 yes Fig.34 A front elevation view of an exemplary vibration generator illustrated in FIG.

[0068] Fig.36 is a partial side elevation view of one embodiment of a dermabrasion device with a portion of a cover removed, illustrating a blade assembly control mechanism and showing with the blade assembly installed.

[0069] Fig.37is a side elevation view illustrating the relationship between the blade assembly control mechanism and the blade assembly.

[0070] Fig.38 yes Fig.29 A partial isometric view of an alternative embodiment of a blade stopper illustrated in FIG. 1, shown loaded with a blade assembly and also shown with a blade assembly to be loaded Fig. 24B A partial isometric view of a microdermabrasion device illustrated in FIG.

[0071] Fig.39 is a partial side elevation view with a portion of the housing removed, also illustrating the blade assembly partially loaded into the dermabrasion device.

[0072] Fig.40 is a partial isometric view of the dermabrasion device after the blade assembly has been fully loaded, shown with the dermabrasion device removed from the blade stop.

[0073] Fig.41 Yes Figure 21-23 A partial front view of a microdermabrasion device illustrated in , with an alternative embodiment of a blade assembly fully loaded and with the housing removed, illustrating the relationship between the alternative embodiment of the blade assembly and the blade control mechanism.

[0074] Fig.42 Similar to Fig.41 , but shown with the alternative blade assembly removed. DETAILED DESCRIPTION

[0075] The present disclosure includes a method and handheld device for microdermabrasion that is relatively safe for non-professional use. Generally speaking, the handheld device includes a blade assembly removably mounted to a housing. The blade assembly includes a blade or scraper, a blade holder for carrying the blade, and a safety cage. The safety cage is juxtaposed or positioned on the cutting edge of the blade, which limits the amount of penetration of the blade into the facial skin. Thus, use of the device enables non-professionals to safely perform microdermabrasion on a person's face.

[0076] A number of exemplary embodiments of microdermabrasion devices are described and illustrated. All embodiments include an exemplary housing (e.g., as in Figure 1-18 and 21-23), and a blade assembly and a vibration generator.

[0077] Figure 1-6 A first embodiment described in the claims includes a piezoelectric crystal circuit for vibrating a blade at an ultrasonic frequency (e.g., a frequency greater than 20,000 Hz), and a motor having an eccentric rotating load that vibrates the blade assembly at a frequency different from the ultrasonic frequency (e.g., a frequency less than 20,000 Hz).

[0078] Figure 7-11 A second embodiment is described in . In this embodiment, the dermabrasion device comprises only a piezoelectric crystal circuit attached to the blade.

[0079] The third embodiment is described in Fig.12 , 13 , 13A, 13G, 14 and 15. In this embodiment, the microdermabrasion device comprises an electric motor with a rotating eccentric load as a vibration generator.

[0080] The fourth exemplary embodiment is described in Figure 21-23 , 24A, 24B, 27A, 27B and 32-37. This embodiment includes a vibration generator, such as a motor and an eccentrically mounted mass mounted on the motor shaft, as illustrated in Figures 34 and 35.

[0081] Fig.25A , 25B and 26 instructions for Figure 21-23 , 24A, 24B, 27A, 27B, 36-38, 41 and 42 are exemplary substrates for the devices illustrated in FIG. Fig.28 An exemplary blade assembly for use with the fourth embodiment is described. Fig.41 and 42 instructions Fig.28 An exemplary alternative embodiment of the blade assembly described in . Figure 29-31 An exemplary blade stop for use with the blade assembly illustrated in FIGS. 28 , 41 , and 42 is illustrated.

[0082] Fourth embodiment

[0083] A fourth embodiment of the microdermabrasion device is described in Figure 21-23 and 36-42. See first Figure 21-23 , 24A and 24B illustrate an exemplary housing for a fourth exemplary embodiment of a dermabrasion device. Exemplary profiles are shown. FIGS. 21-23 illustrate a housing for a dermabrasion device in which a blade assembly is mounted and Fig.24A and 24B A dermabrasion device is described wherein the blade is removed. The housing can accommodate Fig.28 The blade assembly described in Fig.41 and 42 The blade assembly described in the invention and any blade assembly that can be inserted and removed and satisfies the functional interlock of the blade control mechanism as discussed below. Figure 21-24B ) The dermabrasion device identified in FIG. 1 includes a removable blade assembly 330; a handle portion 304 and a base portion 306 forming a housing.

[0084] Fig.25A , 25B26 illustrate an exemplary base or stand for storing and charging the microdermabrasion device 300. In the exemplary embodiment shown, the exemplary stand 310 is configured to receive a microdermabrasion device without a blade assembly, e.g. Fig.24A and 24B . One of the reasons for configuring the stand 310 in this manner is that the blade assembly will be removed after each use for hygienic reasons. As will be discussed in more detail below, the blade assembly control mechanism in the device is configured to break off an upwardly extending projection 352, such as an L-shaped projection 352 or other upwardly extending projection that is configured so that the blade assembly can be fully inserted and breaks off the blade assembly when the blade assembly is being removed. If an attempt is made to reinsert the blade assembly 330 after breaking off the projection, the blade assembly control mechanism 309 will sense the lack of projection 352 and prevent the device from operating.

[0085] As in Fig.25B , the exemplary base 308 includes a cradle portion 310 for receiving the base portion 306 of the microdermabrasion device 300 and a stand portion 312 that enables the handle portion 304 of the device 300 to rest thereon. As shown, the cradle portion 310 is formed with a groove 313 that contours to the bottom support surface of the base portion 306 of the microdermabrasion device 300, such as Fig.24A and 24B The groove 313 is contoured so that the base portion 306 of the microdermabrasion device 300 rests on the bottom surface of the groove 310 and the sidewalls of the base portion 306 of the microdermabrasion device 300 are in contact with the sidewalls 313 of the groove 310.

[0086] The stand portion 312 is used to support the microdermabrasion device 300 in an upright position at an angle of approximately 50° from the horizontal. Fig.25A The top surface 314 of the seat portion 312 is angled to support the handle portion 304 intermediate the free end.

[0087] In the exemplary embodiment shown, the connection between the dermabrasion device 300 and the base 308 is a mechanical connection. As will be discussed in more detail below, the exemplary device may also include an inductive charger. The primary winding of the inductive charger is carried in the base and is "connected" to the secondary winding and battery charger in the device 300 by magnetic induction. In this embodiment shown, the dermabrasion device 300 is formed as a portable device and may include an internal rechargeable battery. An inductive battery charger may be implemented for charging the internal battery. As will be discussed in more detail below, when the dermabrasion device 300 is placed in the base 308, the internal battery is charged by induction. The components are configured so that the secondary side of the inductive battery charger is within a predetermined distance from the primary side of the inductive battery charger. Therefore, even if there is no electrical contact between the dermabrasion device 300 and the base 308, the internal battery is still charged.

[0088] Various alternative embodiments are also contemplated. One alternative embodiment encompasses a non-rechargeable internal battery. In this embodiment, the non-rechargeable battery is replaced periodically. In other alternative embodiments that include a rechargeable battery, external electrical contacts are formed on the exterior of the microdermabrasion device 300 that are configured to mate with corresponding contacts on the base 308. In this embodiment, the external contacts on the base 308 are connected to an external AC or DC source for charging the internal rechargeable battery.

[0089] In yet another alternative embodiment, the dermabrasion device 300 is powered from an external AC source hardwired into the device 300. This embodiment requires a constant source of AC power for operation.

[0090] In the illustrated and described embodiment, the device includes an internal rechargeable battery that is charged by an inductive charger. The main inductive circuit discussed below is contained between the bottom surface of the substrate and the plate 316 ( Fig.26 ). The main inductive circuit is terminated at a fixed connector (not shown) accessible through a cutout 322 in the bottom plate 316. An external connector 324 is configured to mate with the fixed connector. The external connector is connected to a cable that is connected to an external power source.

[0091] like Fig.26 , the base 308 is pointed on its side to illustrate the bottom plate 316, which is attached to the bottom of the base 308 by a pair of fasteners 318 and 320. Fig.27B As shown in FIG. 1 , the bottom plate 316 and the top surface 317 ( Fig.25B) can be used to carry the primary side of the charging circuit. Specifically, several of the components including the ballast block 421, the steel block 428, the magnetic switch 427, and the printed circuit board 429 are carried in the bracket portion 310 of the base 308. The socket 431 is accessible from the bottom of the base 308 for receiving the internal connector 322 ( Fig.26 ) for connection to an external power source (not shown). The magnet 404 carried by the device 300 is configured to align with the steel block 428 when the device 300 is received in the cradle portion 310 of the base 306. This trips the magnetic switch 427 to indicate that the device 300 is in position for charging. This causes the base portion 312 ( Fig.25B ) is connected to an external power source. The transmitting coil 434 is positioned in the base portion 312 of the cradle portion 310 so as to be aligned with the receiving coil 435 formed in the handle portion 304 of the device 300. Thus, when the device 300 is placed in the base 308 and the external connector 324 ( Fig.26 ) is connected to the socket 431 in the base 308 and connected to an external power source, power applied to the transmitting coil 434 is coupled to the receiving coil 435 by magnetic induction to charge the internal battery 403 carried by the device 300.

[0092] An exemplary blade assembly 330 is illustrated in Fig.28 The blade assembly 330 may be injection molded around the blade and configured so that the body portion or blade holder 360 may be positioned within the track 334 ( Fig. 24B ). The exemplary blade assembly 330 includes a body portion 360, a nose portion 362, and may include a safety cage portion 364. Alternatively, the safety cage portion 364 may be formed as part of the blade. The nose portion 362 is formed to fit the base portion 306 ( Fig.24A ) in the cutout 366. The safety cage portion 364 extends outwardly from the bottom of the main body portion 360. The safety cage portion 364 is formed with a plurality of outwardly extending teeth, generally identified by reference numeral 368. The teeth 368 extend generally the entire length of the blade assembly 330. The teeth 368 are spaced apart. For example, the blade 364 is disposed slightly below the tip of the teeth 368, as shown in FIG. Fig.16A In other words, the teeth extend further than the edge of the blade. The distance between the tip of the tooth 368 and the edge of the blade establishes the penetration of the blade. Typically, several millimeters of penetration is suitable for use by non-professionals.

[0093] As will be discussed in more detail below, the body portion 360 of the blade assembly 330 is formed to cooperate with the blade assembly control mechanism discussed below to provide an interlock with respect to certain aspects of the control logic. Specifically, in an exemplary embodiment, the control logic utilizes the configuration of the body portion 360 of the blade assembly 330 to perform one or more of the following functions:

[0094] • Determine whether the blade assembly 330 is fully inserted into the dermabrasion device 300 .

[0095] • Determine whether the blade assembly 330 has been previously removed from the device 300 .

[0096] • Releasably "locks" the blade assembly 330 in the fully inserted position.

[0097] Each of these functions is described in detail. Several of these functions are formed as interlocks. The interlock is a combination of blade assembly 330 and blade assembly control mechanism 309 ( Fig.27A , 36 Specifically, the body portion 360 of the blade assembly 330 may be configured to cooperate with one or more of the blade assembly control mechanisms 309 to provide one or more of the above-mentioned functions.

[0098] The blade assembly control mechanism 309 includes a main body portion and one or more micro switches 408, 409 responsive to one or more spring-loaded strikers 413, 414 that form an electrical interlock. The strikers 413, 414 are biased downward. When the strikers 413, 414 are forced upward, the micro switches 408, 409 are actuated. The blade assembly control mechanism 309 may also include a mechanical interlock. For example, the blade assembly control mechanism 309 may include a spring-loaded blade 422 that is biased downward. The spring-loaded knife 422 is configured to break off the extended protrusion 352 when the blade assembly is removed. After reinserting the blade assembly 330, the spring-loaded striker 414 is not moved upward, and the micro switch 409 is not actuated. The blade assembly control mechanism 309 may also include one or more mechanical interlocks. For example, the blade assembly control mechanism 309 may also include a downwardly biased spring-loaded striker 411 that cooperates with an arcuate notch 322 formed in the lower bracket surface 354 of the blade assembly 330 to create a locking mechanism that is released when the blade assembly 330 is removed from the device 300 .

[0099] Various types of locking mechanisms are contemplated for locking the blade assembly 330 in place during use. An exemplary locking mechanism is described in Fig.27A and 27B middle. Fig.27AAn enlarged partial cross-sectional view of the head portion 307 of the microdermabrasion device 300 is illustrated. Fig.27B Similar to Fig.27A , but in more detail and illustrating the head portion 307 of the microdermabrasion device 300 disposed in the base 308, as discussed above.

[0100] First see Fig.27A . An exemplary locking mechanism is illustrated when the spring-loaded striker 411 is carried by the blade assembly control mechanism 309. The striker 411 is configured to cooperate with the arcuate recess 336 formed in the body portion 360 of the blade assembly 330. When the blade assembly 330 is slid into position, the spring-loaded striker 411 slides along the top surface of the body portion 360 of the blade assembly 330. When the blade assembly 330 approaches its fully inserted position, the spring force pushes the striker 411 downward until it is seated in the arcuate recess 336 formed at the end of the blade assembly 330 (e.g., Fig.27A ), thereby locking the blade assembly 330 in place.

[0101] To remove the blade assembly 330, a lateral force opposite the insertion force is applied to the blade assembly 330. The lateral force retracts the striker 411 as the tip of the striker arches upwardly the curved surface of the arcuate recess 336. Once the striker 411 leaves the arcuate recess 336, the blade assembly 330 is substantially unlocked and can be removed.

[0102] A positive indication may also be provided to the control logic for the dermabrasion device 300 to indicate that the blade assembly 330 is sufficiently inserted into the dermabrasion device 300. In particular, a pair of micro switches 408 and 409 may be provided to provide a positive indication that the blade assembly 330 is sufficiently inserted into the dermabrasion device 300. These micro switches 408 and 409 are actuated by spring-loaded strikers 413 and 414, respectively. In particular, the spring-loaded striker 413 is configured to actuate the micro switch 408, while the spring-loaded striker 414 is configured to actuate the micro switch 409. The strikers 413 and 414 straddle the top surface of the blade assembly 330 as it is being inserted into or removed from the dermabrasion device 300. In particular, when the blade assembly 330 is being inserted, the striker 414 is positioned along the upper support surface 350 ( Fig.28) straddles and initially activates the micro switch 408. When the moving striker 414 passes over the upper support surface 350 and onto the lower support surface 354, the spring-loaded striker 414 is pushed downward by the spring force, thereby deactivating the micro switch 408. As the blade assembly 330 is continuously inserted, the striker 413 is biased upward by the protrusion 352 formed on the upper support surface 354 of the blade assembly, thereby actuating the micro switch 414, which remains actuated when the blade assembly 330 is fully inserted into the dermabrasion device 300. At this time, both the strikers 413 and 414 are biased upward, thereby actuating the two micro switches 408 and 409, and as will be discussed below, the dermabrasion device 300 is inoperable until the two micro switches 408 and 409 are actuated.

[0103] The dermabrasion device 300 may also be configured so that once the blade assembly 330 has been removed from the device, the blade assembly 330 can no longer be used. Various mechanical interlock systems for this functionality are contemplated. Exemplary interlock systems are described in Fig.27A and 27B For example, the spring-loaded blade 422 extends downward from the blade assembly control mechanism 309 into the path of the blade assembly 330 as it is being inserted and removed from the dermabrasion device 300. The front surface 353 of the blade 422 is formed with a cam-shaped surface. Thus, when the blade assembly 330 is being inserted, the extended protrusion 352 on the blade body 360 of the blade assembly 330 causes the blade 422 to push the blade 351 upward against the spring force. As the blade assembly 330 continues to advance toward the fully inserted position, the blade 422 returns to the normal position under the influence of the spring, as shown.

[0104] When removing blade assembly 330 from the device, protrusion 352 of blade assembly 330 grabs flat surface 355 of blade 351. In order to remove blade assembly 330, sufficient lateral force must be applied to break protrusion 352 to allow removal of blade assembly 330. After breaking protrusion 352, removal of blade assembly 330 can continue. Surfaces 337 and 339 will slide under blade 351 to allow complete removal of blade assembly 330.

[0105] Once it is removed, then upon reinsertion, the projection 352 will not be available to activate the striker 414 and microswitch 409, thus preventing reuse of that blade assembly 330, and thus if the blade assembly 330 is reinserted, the microswitch 409 will not be actuated. As will be discussed in more detail, the dermabrasion device 300 will not operate unless both microswitches 408 and 409 are activated. Thus, the projection 352 prevents the blade assembly 330 from being reused.

[0106] Alternatively, the upper bracket surface may extend further along the length of the blade assembly 330, defining an extended upper bracket surface to actuate the striker 411 and micro switch 409 when the blade assembly is being fully inserted and when it is being fully removed. This configuration results in a reusable blade assembly.

[0107] As described below, any blade assembly for use with the device 300 must satisfy two interlocks or conditions. The first interlock is with micro switch 408. This micro switch 408 indicates that the blade assembly has been inserted into the device 300. As discussed below, the first interlock alone is not sufficient to enable the device 300 to be activated. The second interlock is with micro switch 409. This second interlock indicates that the blade assembly is fully inserted. Both interlocks are required before the device 300 can be activated. See FIG. Fig.27A , the second interlock responds to the spring-loaded striker 414. The spring-loaded striker 414 will actuate the micro switch 409 only when the protrusion 352 is in place. Once the protrusion 352 is broken off, any attempt to reuse the blade assembly 330 will result in the striker being unable to move upward to actuate the micro switch 409.

[0108] Anticipate Fig.28 Any blade assembly including a body portion 360 configured to be inserted into and removed from the dermabrasion device 300 and satisfying both interlocks with the blade assembly control mechanism 309 (i.e., actuating microswitches 408 and 409) is contemplated to be within the broad scope of the present invention.

[0109] An exemplary alternative embodiment of the blade assembly 330 is described in Fig.41 and 42 300 '. The blade assembly 330' is suitable for reuse while still satisfying the various interlocks of the blade assembly control mechanism 309 that allow the device 300 to operate.

[0110] Fig.41 An exemplary embodiment of an alternative blade assembly 330' is illustrated that is fully inserted into the device 300, while Fig.42 An alternative blade assembly 330' is illustrated during the removal process. Fig.41 , Fig.28 The projection 352 in the blade assembly 330 described in the embodiment is replaced with a ramp 352'. The configuration of the alternative blade assembly 330' satisfies the two interlocks discussed above. When the blade assembly 330' is inserted, the spring-loaded blade 351 and the striker 414 slide up along the ramp 352'. When the blade assembly 330' reaches the position shown in FIG. Fig.41, the striker 414 reaches the apex of the ramp 352'. This moves the striker 414 upward and actuates the micro switch 409 to indicate that the blade assembly 330' is fully inserted, thus satisfying the second interlock discussed above. When the blade assembly 330' is removed, as in Fig.42 , the spring loaded blade 351 rides on the ramp 352', thereby allowing the blade assembly 330' to be removed. The blade assembly 330' may be reinserted as discussed above.

[0111] The alternative blade assembly 330' also satisfies the first interlock. Fig.41 and 42 , alternative blade assembly 330' also includes a body portion 360' having a top bracket 350', similar to blade assembly 330. Thus, when alternative blade assembly 330' is inserted into device 300, striker 411 contacts top bracket 350' of alternative body portion 360', which in turn actuates micro switch 408, thereby satisfying the first interlock.

[0112] In order to be usable with the device 300, any alternative blade assembly must be able to satisfy the two interlocks discussed above. In other words, any alternative blade assembly must be able to actuate the limit switches 408 and 409 upon insertion. As discussed above, embodiments are contemplated that allow the blade assembly to be reused after it has been removed from the device. Other embodiments are contemplated that do not include a locking feature. In these embodiments, an alternative body portion 360 is formed without the arcuate recess 336 discussed above, in which embodiments the spring-loaded striker 413 will simply rest on a surface other than the arcuate surface that provides the locking feature.

[0113] Fig.36 and 37 A simplified diagram illustrating blade assembly control mechanism 309 . Fig.36 The blade assembly 330 is illustrated fully inserted. Fig.37 The blade assembly 330 ( FIG. 10 ) is shown removed from the blade assembly control mechanism 309. Fig.28 ). The blade assembly control mechanism 309 is configured to carry one or more of the spring-loaded strikers 411, 413, and 414 and the spring-loaded blade 351. The blade assembly control mechanism 309 may also be configured to carry micro switches 408 and 409. As mentioned above, the micro switch 408 responds to the striker 413, while the micro switch 409 responds to the striker 414. The micro switches 408 and 409 and Fig.32 The battery charging circuit and control circuit described in the embodiment are provided by means of a printed circuit board (PCB) 405 ( Fig.36 and 37) together.

[0114] An exemplary electrical schematic diagram and an exemplary software logic flow chart are respectively described in Fig.32 and 33 First go to Fig.32 , illustrating an exemplary embodiment of a battery charging circuit. Specifically, the battery charging circuit is coupled to an external power source by magnetic induction. Specifically, a primary winding (not shown) is disposed on a substrate 308 ( Fig.26 ). The device 300 is charged by magnetic induction charging, and the receiving coil 435 ( Fig.27B ), which cooperates with the transmitting coil 434 in the bracket portion of the base 308. As mentioned above, the transmitting coil 434 ( Fig.27B ) and the rest of the primary circuit are carried by the cradle portion 310 of the base 308. When the device 300 is fully seated in the cradle portion 310 of the base 308, the magnetic switch 427 located in the base 308 will detect the magnet 404 located in the abdomen of the device 300 and will connect the primary winding 434 to the socket 431. If the connector 324 is connected to the socket 431 and connected to an external power source, then the secondary winding 400 ( Fig.32 ), the secondary winding is in turn connected to a battery charger circuit for charging the internal battery 403. The components of the primary side of the magnetic induction circuit are connected together by means of a PCB 429 located in the bracket portion 308 of the base 306.

[0115] The primary winding diameter 434 and the secondary winding diameter 435 ( Fig.27B ) is 16 mm by 3 mm, with a maximum coupling distance of 5 mm. The secondary winding 435 is connected to a bridge rectifier 402 comprising four diodes. The output of the bridge rectifier 402 is an unregulated DC voltage that is connected to a battery charger U1 (e.g., a lithium-ion constant current / constant voltage battery charger, model number TP054). A pair of capacitors C1 and C2 are connected across the output of the bridge rectifier 402 to stabilize the voltage to the battery charger U1. In addition, a Zener diode D2 is also connected across the output of the bridge rectifier 402 as a parallel regulator to protect the battery charger U1 from voltages higher than the Zener voltage. A pair of series-connected resistors R1 and R3 are also connected across the rectifier 402 output. These resistors form a voltage divider and are used to generate a signal representing the voltage applied to the battery charger U1<POW IN> This signal<POW IN> Tenx model TM57 / PA10A-SOP16 used to indicate to the microprocessor 404 that the charging circuit is connected to an external power source, for example.

[0116] The positive rail of the bridge rectifier 402 is connected to the voltage terminal VDD on the battery charger U1. The negative rail of the bridge rectifier 402 is connected to the ground terminal GND on the battery charger U1. The charge status terminal CHRG on the battery charger U1 is used to indicate the status of charging. This terminal CHRG is applied to the microprocessor 404 and is pulled low during battery charging and is therefore used to indicate the presence of a charging cycle to the microprocessor 404. Terminal BAT is connected to the positive rail of the battery 403 for charging. A pair of voltage divider resistors R2 and R5 are connected across the battery 403 to produce a signal<POW BT> . This signal<POW BT> The battery 403 is connected across the positive and negative rails of the charging circuit. Any time the battery 403 is below 2.9 volts DC, the battery charger U1 causes a trickle charge to be applied to the battery 403 until the battery 403 reaches 2.9 volts DC. The battery charger U1 then enters a constant current mode. The charging current is programmable and is programmed by a resistor R4 attached to the PROG terminal of the battery charger U1.

[0117] A voltage stabilizing capacitor C3 is connected across the input of the voltage regulator 406. The positive rail is also connected to an input terminal Vin on the voltage regulator 406. The voltage regulator 406 regulates the output voltage of the battery to a nominal 2.8 volts DC. The 2.8 volt DC output is available at the output terminal Vout of the regulator 406. A ground terminal GND on the voltage regulator 406 is connected to the system ground. A pair of capacitors C3 and C4 are connected between the output terminal Vout of the voltage regulator 406 and the system ground. These capacitors C3 and C4 are connected in parallel and are used to stabilize the output voltage at the output terminal Vout of the regulator 406.

[0118] The microprocessor 404 controls the microdermabrasion device 300. The microprocessor 404 receives signals from micro switches 408 and 409 ( Fig.27A), the status of charging by the battery charger U1, the battery voltage, whether the on / off switch is actuated, and whether the microdermabrasion device 300 is being charged by the charging cradle portion 308. Specifically, the CHRG signal from the battery charger U1 is applied to port PA3 of the microprocessor 404. When the battery charger U1 is charging the battery 403, the CHRG signal is low. The signal CHRG is also applied to the VDD pin of the microprocessor 404 with the aid of a current limiting resistor R7. During conditions when the battery 403 is not charging, the pin VDD is pulled up with 2.8 volts DC. During charging, the pin VDD is pulled low, indicating that the battery 403 is not fully charged. The signal<POW IN> applied to transistor switch Q2. When input power is available, as determined by<POW IN> 406 and current limiting resistor R11. When the micro switch 409 is engaged when the blade assembly 330 is inserted into the dermabrasion device 300, the switch 408 is closed, thereby pulling the port PB0 low. The micro switch 408 is connected to the port PA0. Specifically, the port PA0 is normally pulled high by means of the 2.8 volt DC signal from the voltage regulator 406 and the current limiting resistor R6. When the micro switch 409 is engaged when the blade assembly 330 is inserted into the dermabrasion device 300, the switches 406 / 407 are closed, thereby pulling the port PA0 low. The on / off type switch 406 / 407 is connected to the port PB2 of the microprocessor 404. When the switch 406 / 407 is pressed, the port PB2 is pulled low, thereby turning on the motor 413, as discussed below.

[0119] As will be discussed below with respect to control logic, the microprocessor 404 outputs a signal <mot>The microprocessor 404 controls the motor 413 which forms part of the vibration generator. The microprocessor 404 also controls LED0. LED0 is connected between the output voltage of the regulator and the port PA1 by means of a current limiting resistor R8. The microprocessor 404 also generates a feedback signal<AD MOT> , which serves to stabilize the vibration and make it independent of the battery level.

[0120] An exemplary motor control circuit is illustrated. As shown, the motor 413 is powered from 4.2 volts DC available at the positive terminal of the battery 403. The motor 413 is connected between the 4.2 volts DC and ground by means of a switching circuit and a feedback circuit. The motor 413 is connected between the 4.2 volts DC available at the battery 403 and ground by means of a switching circuit 412 and a resistor R12. The switching circuit 412 includes a current limiting resistor R9 connected by means of a current limiting resistor R12. <mot>The signal drives the switching transistor Q1. <mot>When asserted by the microprocessor 404, transistor switch Q1 will connect the motor 413 to ground via resistor R12, thus turning the motor on. Capacitor C6 stabilizes the voltage to the motor. When the motor 413 is turned off, the freewheeling diode D3 provides a current path. Diode D4 blocks the motor current from bypassing the switching circuit 412.

[0121] Feedback circuit 414 stabilizes the operation of motor 413 and substantially isolates it from the voltage level of battery 403. Nominally, battery 403 is at 4.2 volts DC. Once motor 413 is turned on, the feedback signal<AD MOT> becomes high and about 2.8 volts DC is applied across resistor R13. Capacitor C8 stabilizes this voltage. Resistors R10 and R13 form a voltage divider to provide a voltage from across resistor R12.<AD MOT> The voltage across R10 is stabilized and applied to resistor R12. Capacitor C7 stabilizes the voltage applied to resistor R12. The constant voltage across R12 will cause a constant current to flow through the motor 413, regardless of the level of the battery 403. The constant current will cause the motor to operate at a constant speed, since the speed of a DC motor is proportional to the current.

[0122] By microprocessor 404 ( Fig.32 ) is executed in the software flow chart Fig.33 Initially, when the on / off switch 406 / 407 ( Fig.27B ), the battery power is connected to the dermabrasion device 300, as indicated in step 424. Next in step 424, the system checks whether the blade assembly 330 is detected. More specifically, the system checks whether the micro switches 408 and 409 ( Fig.27A ) - indicating that the blade assembly 330 has been fully inserted into the device 300. If the blade assembly has not been detected, the system loops back to step 422 and keeps checking for insertion of the blade assembly 330. Once the blade assembly 330 is inserted into the device 300, the motor 413 is actuated in step 424. Specifically, the microprocessor 404 generates a gate voltage applied to the gate of the transistor Q1 to turn the transistor Q1 on. <mot>This completes the circuit from the 4.2 volt supply voltage through the series motor to ground with the aid of resistor R12. The microprocessor 404 also generates<AD MOT> The signal stabilizes the speed of the motor 404 and isolates the speed of the motor 404 from the voltage of the battery 403. In addition, the microprocessor 404 illuminates the LED0 and flashes it in two long and two short pulses.

[0123] The system checks in step 426 whether the on / off switch 406 / 407 has been disconnected ( Fig.27A ). If so, the system loops back to step 420 and waits for switch 406 / 407 to turn back on. If switch 406 / 407 has not been turned off, the system checks in step 428 whether blade assembly 330 has been at least partially released. Specifically, in step 430, when blade assembly 330 is partially removed to the point where micro switch 409 ( Fig.27A ) deactuates, then the microprocessor 404 flashes LED0 at 4KHz. When the blade assembly 330 is removed to the point where the second microswitch 408 is deactuated, as indicated in step 432, LED0 turns on steadily in step 434. The system then loops back to step 422 and waits for the blade assembly 330 to be detected.

[0124] After the system checks in step 426 whether the on / off switch 406 / 407 has been pressed, and after the system checks in step 428 whether the blade assembly 330 is fully inserted into the device 300, the system checks in step 436 whether an external power source is connected to the primary winding 434 of the charger circuit, and the voltage VDD is generated by the microprocessor 404 via the power input signal<POW IN> To detect. Power input signal<POW IN> is a signal at the junction of the series-connected resistors R1 and R3. The series-connected resistors R1 and R3 are connected in parallel with the output of the bridge rectifier 402. Therefore, when the external power source is connected to the primary winding 434 ( Fig.27A ), power is induced in the secondary winding 435, which causes an AC voltage across resistors R1 and R3. This voltage in turn causes the signal<POW IN> has a positive voltage, indicating that external power has been applied to primary winding 434 and that primary winding 434 is in bracket 308 such that the voltage on primary winding 434 is coupled to secondary winding 400, as indicated in step 436. In step 438, once the voltage on secondary winding 435 has been detected, microprocessor 404 flashes LED0 in four (4) long pulses.

[0125] The system also determines when the battery charging is complete. This is done by monitoring the CHRG pin on the battery charger U1, as indicated in step 440. Once charging is complete, then in step 442, the microprocessor 404 turns LED0 on steadily to indicate that the external power source can be disconnected in step 444. Once the external power source is removed, the signal<POW IN> becomes low, causing the system to loop back to step 422.

[0126] Fig.34 Exemplary details for the vibration generator are provided. Specifically, the vibration generator 450 includes a motor 452 having a shaft 452 and a counterweight 454. The counterweight 454 is eccentrically configured and attached to the motor shaft 452 so as to rotate with the motor shaft 452 without sliding. When the motor shaft 452 rotates, the counterweight 454 rotates. Because the counterweight 454 is eccentrically (i.e., asymmetrically) disposed relative to the motor shaft 452, the rotation of the counterweight 454 transfers vibration to the blade assembly 330, thereby vibrating the blade assembly 330.

[0127] The weight 450 may be 3 mm in length and have a radius of 1.9 mm. The speed of the motor 440 is 10,000 RPM. Thus, when the motor is energized with 1.5 volts DC and an operating current of 50 mA, the vibration generator 450 generates a subsonic frequency.

[0128] See also Fig.27B , the microdermabrasion device 300 includes a top housing portion 401 and a base housing portion 430. These housing portions 401 and 430 can be fastened together by various conventional means. For example, screws can be used and covered with screw covers, such as screw covers 432. The side of the housing is shown in Fig.24A and 24B The top of the housing is shown in Fig.23 middle.

[0129] An exemplary blade stop 370 is illustrated in Figure 29-31 The blade stopper 370 is used to carry the additional blade assembly 330. Fig.29 As shown in FIG. 1 , the exemplary blade stopper 370 as shown includes exemplary six (6) slots 372 for carrying six (6) blade assemblies 330. The blade assemblies 330 and 330″ are oriented in the blade stopper 370 to enable the blade assembly 330″ to be directly loaded into the dermabrasion device 300 without requiring the user to touch the blade assembly 330″. Figure 31-33 As shown in , the blade stopper 370 is formed in an exemplary elliptical shape with a slot 372 formed perpendicular to the major axis of the ellipse.

[0130] See also Figure 38-40 , Figure 29-31 The alternative embodiment of the blade retainer 370 illustrated in FIG. 1 includes a plurality of slots 372 for carrying an alternative blade assembly 330, such as in FIG. Fig.39 As best illustrated in Fig.39 As best shown in FIG. 1 , each blade assembly 330″ includes a slot 332 ( Fig.28 ) one or more notches 333, 335 ( Fig.39 These notches 333, 335 ( Fig.39 ) and the groove 372 ( Fig.29 ) of one or more "L" shaped arms 337 ( Fig.40 ) cooperates, the arm having an extended horizontal leg portion 339 ( Fig.38 ) which is configured to be received in a notch 333 ( Fig.39 ) wherein the slot retains the blade assembly 330" ( Fig.28 ) on both sides.

[0131] "L" shaped arm 339( Fig.38 and 40 ) in the blade assembly 330" ( Fig.28 ) below the groove 332 on the side. This configuration enables the track 334 ( Fig.38 ) can be received in the slot 332 on the blade assembly 330", such as generally Fig.38 and 39 Displayed in.

[0132] Fig.38 30'. The blade assembly 330" is illustrated just prior to being loaded into the device 300. To load the blade assembly 330" into the device 300, the track 334 on the device 300 is aligned with the slot 370 on the blade assembly 330". The device 300 is then inserted toward the blade stop 370' so that the track 334 can be received in the slot 370 on the blade stop 370'. Once the track 334 on the device 300 is received in the slot 370, the device 330 is moved toward the nose 362 of the blade assembly 330", as shown in FIG. Fig.39 When the blade assembly 330' is fully loaded, the device 300 is removed from the blade stopper 370'. The "L" shaped legs 337 are flexible and allow the blade assembly 330" to be removed from the blade stopper 370' with less upward force.

[0133] The symmetry of the device 300 makes it suitable for easily treating the left and right sides of a person's face. Fig.21 ) is angled 40° to 60°, preferably 50°, about the horizontal. In addition, the device 300 is contoured to treat both sides of the face in a downward motion. To treat the right side of the face, the device 300 can be held by the right hand of the person. Similarly, to treat the left side of the face, the device 300 can be held by the left hand of the person.

[0134] Embodiments 1 to 3

[0135] shell

[0136] As mentioned above, Figure 1 An exemplary housing, generally identified by reference numeral 20, is illustrated for use with various embodiments containing a piezoelectric crystal and circuitry and / or a motor and optional rheostat for controlling the speed of the motor, e.g., in Figure 2-6 and Figure 12-15 . The housing 20 may be formed as a cylindrical hollow member that is closed on each end and formed in two parts by means of, for example, injection molded plastic or other materials. Specifically, the housing 20 includes an end cap 21 that forms a handle portion and a top cap 24 that forms a cover portion. The cover portion 24 may be configured to be attached to the main housing 26 at a parting line 27, discussed below. The handle portion 21 is attached to the main housing 26 at a parting line 30. In this exemplary embodiment, an on / off switch and an optional integrated LED (light emitting diode) for controlling power to the device, generally identified by reference numeral 29, are carried by the main housing 26 and may be exposed between the handle portion 21 and the cover portion 24. As discussed in more detail below, an optional thumb wheel control switch 31 carried by the main housing 26 may be used to control the speed of the motor 34.

[0137] Figure 7 An alternative housing is illustrated which is generally identified by reference numeral 23. The housing 23 is used in embodiments which do not include a rheostat and optional thumb wheel.

[0138] As used herein, the term housing refers individually to the housing 20 ( Figure 1 ) and 23( Figure 7 ), and individually and collectively refer to the housings 21, 23 in combination with the main housing 28 ( Figure 2 ) combination.

[0139] Various embodiments of the blade assembly are contemplated. For example, Figures 13A-13F An embodiment having a 2-section blade assembly including a scraper and a removable blade is described. In this embodiment, the scraper may be fixedly mounted to the main housing, or alternatively, may be coupled to the main housing with a bayonet mount or other conventional coupling means.

[0140] First embodiment

[0141] First see Figure 2-6 , illustrating and describing a first embodiment of the present invention, and identified by reference numeral 85. The first embodiment of the present invention includes a main housing 28, a piezoelectric crystal 32, a DC motor 34, an eccentric rotating load 36 coupled to a shaft 38, and a power supply (e.g., a battery 22). It is further contemplated that the power supply for the device may be an AC power supply. Such AC power supplies are well known in the art.

[0142] The main housing 28 may be manufactured from a conductive material that forms a battery holder portion, generally identified by reference numeral 40, defining a positive battery contact 42 and a negative battery contact 44. As will be discussed in more detail below, a portion of the wiring between the various devices may be accomplished with the aid of a printed circuit board 45 that may be formed from a flexible printed circuit board. Alternatively, the printed circuit board 45 may be omitted and electrical wiring may be used to make connections between the various devices.

[0143] One end 46 of the main housing 28 may be formed with a reduced diameter cylindrical portion 48 that performs several functions. First, Figure 3 As best shown in FIG. 4 , the interior portion of the reduced diameter cylindrical portion 48 is configured to provide a friction fit against the piezoelectric crystal 32. Second, as Fig.17 As best shown in FIG. 1 , the outer portion of the reduced diameter cylindrical portion 48 provides a bayonet interface for an exemplary replaceable blade 50 mounted with a bayonet interface that cooperates with the bayonet interface on the outer portion of the reduced diameter portion 48. In accordance with an important aspect of the present invention, the safety cage 66 ( Fig.16A ) cooperates on the blade 50 to limit the penetration of the blade 50 into the facial skin.

[0144] Go to Figure 3 , a cross-sectional view of a first embodiment of a microdermabrasion device 85 is illustrated. Figure 3 The main housing 26 is described in detail, and the manner in which all the various components fit therein. The various components may be wired and connected to a printed circuit board 45, such as by soldering.

[0145] As mentioned above, this embodiment includes a piezoelectric crystal for vibrating the blade 46 at an ultrasonic frequency defining an ultrasonic mode of operation. The device may also include a DC motor (generally identified by reference numeral 51) having at least one eccentric rotating load for generating a vibration frequency different from the ultrasonic vibration frequency defining a sub-ultrasonic frequency mode. The eccentric may be formed as a semi-circular disk 51. A fixed bearing 53 may be disposed axially outward from the disk 51 to stabilize the motor shaft 32. Depending on the rotational speed of the motor shaft, vibrations will be created that will be transmitted to the blade assembly 50.

[0146] Driver circuits that drive piezoelectric crystals to generate ultrasonic waves / vibrations are well known in the art. Such circuits typically include an alternating current or voltage applied to a piezoelectric crystal. Examples of such driver circuits are disclosed in U.S. Patent Nos. 3,509,626, 3,967,143, and U.S. Patent Application Publication No. US 2003 / 0233085 A1. This driver circuit is also disclosed in Korean Patent Publication No. KR 2004 0022550, all of which are incorporated herein by reference. It should be understood that all references to piezoelectric devices include driver circuits that cause piezoelectric devices to generate ultrasonic waves / vibrations. The driver circuit including its corresponding components can be placed on a printed circuit board 45.

[0147] 4-6 illustrate the electrical details for controlling a device 50 comprising a piezoelectric element 32 and a DC motor 34 having at least one eccentric rotating load 51. A key aspect of the control is an optional exemplary 4-position rotary switch 31, such as Figures 4A-4D . This 4-position switch is commonly available and includes 4 wires. A normally open rotary contact is provided between terminals 3 and 4 for controlling power to the piezoelectric crystal 32 and between terminals 1 and 2 for controlling power to the DC motor 34. Terminals 2 and 3 are connected together and to the positive terminal of the battery 22.

[0148] In the first position of the rotary switch 31, Figure 4A As shown in FIG, the contact between terminals 3 and 4 for controlling power to the piezoelectric crystal 32 is open, just as the contact between terminals 1 and 2 for controlling power to the DC motor 34 is open. Figure 4A In the position illustrated in FIG. 1 , no power is delivered to the piezoelectric crystal 32 or the motor 34. Figure 4B In the second position of the rotary switch 31 illustrated in FIG. 1 , the contact between terminals 3 and 4 is closed, thereby providing power (i.e., connecting the + battery terminal) to the piezoelectric crystal 32. Since the contact between terminals 1 and 2 is open, when the switch 31 is in the position shown in FIG. Figure 4B When in the position illustrated in FIG. 1 , no power is transmitted to the motor 34 . Figure 4C Another off position illustrates that the contact between terminals 3 and 4 and the contact between terminals 1 and 2 are both broken, thereby disconnecting power from both the piezoelectric crystal 32 and the motor 34 . Figure 4D A position of switch 31 illustrating that the contact between terminals 1 and 2 is closed, thus providing power to motor 34. Since in this position the contact between terminals 3 and 4 is open, no power is transferred to piezoelectric crystal 32 in this position.

[0149] An exemplary schematic diagram for a dermabrasion device 85 is shown in Figure 5 As shown, the circuit is powered by the battery 22. As discussed above, the rotary switch 31 enables the battery 22 to be selectively connected to the piezoelectric crystal 32, or alternatively, to the motor 34, thereby defining the ultrasonic mode or the sub-ultrasonic frequency mode, respectively. Optional LEDs 54 and 56 can be provided to indicate the mode of the device 50. Specifically, the LED 54 is connected in parallel with the piezoelectric crystal 32. Therefore, at any time when the piezoelectric crystal 32 is connected to the positive terminal of the battery 22, the LED 54 is illuminated, thereby indicating that the device 50 is operating in the ultrasonic operating mode. Similarly, the optional LED 56 is connected substantially in parallel with the motor 34. Therefore, at any time when the motor 34 is connected to the positive terminal of the battery 22, the LED 56 will be illuminated, thereby indicating the sub-ultrasonic operating mode. When neither the piezoelectric crystal 32 nor the motor 34 is connected to the positive terminal of the battery 22, both LEDs 54 and 56 will be off.

[0150] An optional rheostat 58 may be connected in series with the motor 34. As is known in the art, the speed of a DC motor can control the voltage applied to the motor. The optional rheostat 58 is adjustable and controllable to vary its resistance, which in turn varies the current and voltage to the motor 34. By varying the speed of the motor 22, the vibration frequency may be varied. Figure 1 , an optional thumb wheel 31 is accessible from outside the housing 20 to allow adjustment of the rheostat 58. For example, the motor 34 may be operated at 600 RPM.

[0151] Figure 6 4 is an optional and exemplary printed circuit board 45 that can be used to connect various components to the circuit. It is contemplated that the configuration of the printed circuit board 45 can be different from the configuration shown. And, various conventional techniques for connecting the various components to the printed circuit board 45 are contemplated. One such technique is soldering. Alternatively, the printed circuit board 45 can be omitted, and the connections between the various components can be made with wires. It is also contemplated that the rotary switch 31 and the optional LEDs 54 and 56 and the optional rheostat 58 can be mounted on the printed circuit board 45.

[0152] Second embodiment

[0153] The second embodiment is described in Figure 8-11 185 and is identified by reference numeral 185. In this embodiment, similar components are identified by similar reference numerals with a prefix of 1. In this embodiment, the dermabrasion device 185 includes only the piezoelectric crystal 132. Fig.10 As shown in FIG. 1 , a simple single-pole single-throw micro switch 129 can be used to control the piezoelectric vibration device 132. An optional LED 154 can be included as part of the micro switch 129. A printed circuit board 145 can be provided for making connections between the various devices. In addition, the micro switch 129 can be mounted to the printed circuit board 145.

[0154] Third embodiment

[0155] The third embodiment is described in Figure 12-15 285 and is identified by reference numeral 285. In this embodiment, similar components are identified by similar reference numerals with a prefix of 2. In this embodiment, the microdermabrasion device 285 includes only the motor 234 and the eccentric rotating load 249 supported by the bearing 253. Fig.14 As shown in FIG. 2 , a simple single-pole single-throw micro switch 229 can be used to control power to the motor 234. An optional LED 256 can be included as part of the micro switch 229. In addition, an optional rheostat 258 can be provided for controlling the speed of the motor 234. As best shown in FIG. Fig.13 , the variable resistor 258 includes a thumb wheel 231. The thumb wheel 231 can be optionally installed (e.g. Figure 1 250) to achieve adjustment of the motor speed from outside the device 250. A printed circuit board 245 may be provided for making connections between the various devices. In addition, a micro switch 229 may be mounted to the printed circuit board 245.

[0156] Fig.12 An alternative embodiment to the embodiment in is described in Fig.13A In this embodiment, like reference numerals with an "a" suffix are used to identify like parts. In this embodiment, no varistor is provided. Also, in this embodiment and Figure 12-15 In the embodiment described in , the printed circuit board can be eliminated. In this embodiment and other embodiments, the blade or scraper 250a can be bayonet mounted or fixedly mounted to the housing 228a.

[0157] In all such embodiments, the scraper or blade 250a may be an integral blade and configured with a bayonet fastener, as illustrated and described above. Alternatively, the blade 250a may be formed as a 2-piece device; that is, a scraper 250a with a removable blade 249a, such as Fig.13A In this embodiment, the scraper 250a can be fixedly mounted to the housing 228a. Other configurations of scrapers with removable blades are also considered to be within the broad scope of the claims.

[0158] Scrapers with removable blades are well known in the art. Examples of scrapers with removable blades are described and illustrated in detail in U.S. Pat. No. 1,139,796, which is incorporated herein by reference. In embodiments with a removable blade 249a, a safety cage 266a as discussed above may be formed on the blade 249a. Fig.13A The device described in may also include a safety cover, for example, similar to Fig.12 The safety cover 252 shown in FIG. 2 is a safety cover (not shown) that cooperates over the scraper 250a and the removable blade 249a.

[0159] Fig.13A A scraper 250a is illustrated having a removable blade 249a attached thereto. Figures 13B-13D The manner in which the removable blade 249a is attached to the scraper 250a is illustrated. The scraper 250a is formed with a plurality of posts, for example, three posts, identified by reference numerals 253a, 255a, and 257a. These posts 253a, 255a, and 257a are formed on the scraper and extend outwardly therefrom on one side, as shown. These posts 253a, 255a, and 257a are formed to cooperate with the grooves 259a, 261a, and 263a formed in the removable blade 253a. As best shown in FIG. Fig. 13B As shown in FIG. 2 , slots 259a and 259b are open slots and are configured to receive extended posts 255a and 257a on scraper 250a. Aperture 263a is formed in blade 250a for receiving post 253a formed on scraper 250a. Fig.13E and 13F As will be apparent, post 253a is shorter than posts 255a and 257a. This feature allows post 253a to snap in place and be received within aperture 249a and essentially lock blade 249a in place with respect to scraper 250a.

[0160] Fig.12 Another alternative embodiment of the embodiment in is described in Figure 13G In this embodiment, like reference numerals with a "b" suffix are used to identify like parts. This embodiment is similar to Fig.13A 270b) to clamp the blade 252b once the cover 270b is slid over the blade 252b.

[0161] blade

[0162] An important aspect of the present invention relates to the blade assembly 50, 150, 250. The blade assembly 50, 150, 250 is best shown in Figure 16-18 In. As in Fig.18 As best shown in FIG. 1 , the blade assembly 50, 150, 250 is mounted to a generally cylindrical portion 60 and is configured to be attached to the handle portion 21 ( Figure 1 ) of the cylindrical portion 48 ( Figure 2 ) is matched. The blade assembly 50, 150, 250 is used only by a single user. Thus, the blade 62 assembly 50, 150, 250 can be removed for disposal and replaced for each new user and for each use.

[0163] like Fig.16 and 18 , the cylindrical portion 60 of the blade assembly 50, 150, 250 is configured to be attached to the cylindrical portion 48 (attached to the handle portion 21), for example, by means of a bayonet connection. Other connections are also possible.

[0164] According to an important aspect of the present invention, the blade assembly 50, 150, 250 comprises a scalpel or scraper 62 and a molded housing 64, preferably in a wedge-shaped cross-section. Fig.17 The blade 62 is arranged along a direction generally parallel to the device housing 20 ( Figure 1 ),twenty three( Figure 7 ) or an axis at an acute angle to the longitudinal axis. In order to limit the depth of the cut into the skin and to prevent non-professionals from accidentally cutting below the epidermal layer of the facial skin, a safety cage 66 is placed on the extension of the blade 62. More specifically, the safety cage 66 extends over the cutting edge 67 of the blade 62 and extends from the blade housing 64. As best shown in FIG. Fig.16A , the safety cage 66 is formed as an exemplary comb-like structure defining posts 68 and valleys 70. The comb-like structure 66 may be injection molded over the cutting edge 67 of the blade 62. Alternatively, the comb-like structure 66 may snap in place over the cutting edge 67 of the blade 62. The depth of the valley 70 limits the depth of the cut by limiting the depth of the valley 70, for example, to a few millimeters. Thus, the blade assembly 50, 150, 250 is rendered safe for use by non-professionals as part of a dermabrasion device.

[0165] As mentioned above, a two-piece blade or scraper may be used. In such embodiments, a safety cage is provided on the cutting edge portion of the removable blade.

[0166] Technology

[0167] A process for treating facial skin by a non-professional is described. An exemplary process for treating facial skin by a non-professional, including microdermabrasion, is discussed below.

[0168] 1. Cleansing: This step prepares the skin for the microdermabrasion procedure. It effectively removes makeup and product residue while removing surface oil from the skin. Warm your face with warm water, apply a small amount of cleanser to wet palms, lather with your hands and massage into your face. Rinse with warm water and repeat. Blot skin dry.

[0169] 2. Microdermabrasion: Using a handheld microdermabrasion device containing blades and embedded vibration technology, for example, as disclosed above, which is safely used by non-professionals, it safely exfoliates the skin. Microdermabrasion devices with blades and embedded vibration technology other than the microdermabrasion devices described herein are also suitable. The vibration technology maximizes the efficiency of the blades while stimulating microcirculation and lymphatic activity. Not only is the skin deeply exfoliated, but all accumulated debris and traces of hair are removed. The skin is made baby soft and product penetration is maximized.

[0170] Start by holding tight and switching the device on. Immediately you will notice a slight vibration.

[0171] like Fig.19 and 20 As instructed in , begin working in the center of the face focusing on the right side, using gentle but firm pressure, moving the device across the forehead and toward the hairline, following the contours of your face, opening up the brow and eye area.

[0172] Once you have completed the upper face, move to the lower face and start again at the center line, using the same soft but firm pressure, move the device up along the jawline towards the ear. Continue finishing up and onto the cheeks, moving along the contour of the cheek from the nose towards the ear. The nose and eye areas should be avoided. When working around the mouth, use short strokes with soft but firm pressure and move towards the vermillion (the edge of the lips), avoiding the surface of the lips.

[0173] The microdermabrasion device is very efficient at exfoliating the skin, and no more than two passes are necessary in any area. When the right side of the face is completed, move to the left side, following the same pattern.

[0174] 3. Peeling: A chemical peel completes the peeling process. A variety of chemical peels are suitable. For example, a chemical peel that includes a blend of alpha and beta hydroxy acids combined with an antioxidant compound (e.g., Bioperfect's Antioxidant Complex) completes the peeling process and amplifies cellular metabolism to help stimulate collagen production. This peel would be used immediately after using a microdermabrasion device.

[0175] Unwrap the prepared peel pad. Starting on the forehead, apply the peel to the entire face and neck, starting on the forehead and using circular motions. Avoid contact with the delicate eye and lip areas.

[0176] 4. Post-Treatment Soothing Balm – Use a balm that has been specifically formulated to soothe, nourish and protect delicate post-treated skin. The balm is absorbed deeply into the flaky skin, resulting in optimal absorption of our exclusive multi-dimensional cosmeceutical complex.

[0177] Use a small amount and massage into face and neck, avoiding the eye area.

[0178] Obviously, many modifications and variations of the present invention are possible in light of the above teachings.It is therefore to be understood that within the scope of the appended claims, the invention may be practiced other than as specifically described above.< / mot> < / mot> < / mot> < / mot>

Claims

1. A blade assembly (330), comprising: a blade holder (360) having a nose portion (362) at only one end of the blade holder (360), and an upper support surface (350) extending in a rearward direction away from the nose portion, the blade holder having a first blade holder side and a second blade holder side; a single blade carried by the blade holder, the single blade disposed in a lower portion of the blade holder, the blade extending along a centerline of the blade holder and extending in a rearward direction away from the nose portion, the blade being located between the first blade holder side and the second blade holder side, the blade having a cutting edge, a first blade side and a second blade side, the first blade side and the second blade side being disposed adjacent to the cutting edge; a safety cage (364, 66) secured over the first blade side and the second blade side, the safety cage being constructed and arranged to limit the amount of penetration of the blade into the facial skin; as well as A pair of parallel aligned slots (332) comprising a first slot disposed along the length of the first blade holder side and disposed below the upper support surface and a second slot disposed along the length of the second blade holder side, each slot being constructed and arranged to slidably receive a complementary track of a hand-held dermabrasion device for mounting the blade assembly.

2. The blade assembly of claim 1, wherein the blade holder is formed with a lower support surface (354).

3. The blade assembly of claim 2, further comprising an upwardly extending projection (352) formed on the lower bracket surface.

4. The blade assembly of claim 3, wherein the projection (352) is an L-shaped projection.

5. The blade assembly of claim 2, further comprising an upwardly extending ramp formed on the lower bracket surface.

6. The blade assembly of claim 2, wherein the upper support surface and the lower support surface are constructed and arranged to cooperate with a blade assembly control mechanism of the handheld dermabrasion device.

7. The blade assembly of claim 1, wherein the safety cage is configured with teeth (368).

8. The blade assembly of claim 1, wherein the pair of parallel aligned grooves are disposed above the cutting edge.

9. A combination of the blade assembly according to claim 1 and the handheld dermabrasion device (300).

10. The combination of claim 9, wherein the handheld microdermabrasion device comprises a housing formed with the complementary tracks (334), the tracks being spaced apart, wherein the pair of parallel aligned slots are constructed and arranged to slide on the complementary tracks.

11. The combination of claim 9, wherein the handheld dermabrasion device includes a cutout (366) in a front region thereof, the cutout being constructed and arranged to receive the nose portion of the blade holder.

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