Cartridge unit for penetration of skin care preparations and cosmetic device including the same

Abstract

The present invention relates to a beauty device for the penetration of a skin beauty agent, and a main body unit and a cartridge unit constituting the same. A main body unit for penetration of a skin cosmetic formulation according to one embodiment of the present invention is characterized by comprising a housing extending around an axis, a rotating part provided to be rotatable relative to the housing around the axis, and a non-rotating part provided not to be rotatable relative to the housing around the axis. According to this, the transfer of the skin care product is simple and efficient, and easy removal and buffering of the cartridge unit can be provided.

Description

Technology Field

[0001] The present invention relates to a cartridge unit for the penetration of a skin care product, and more specifically, to a cartridge unit for the penetration of a skin care product used in a beauty device for simultaneously providing a skin care product and an electrical signal to a user. Background Technology

[0002] With increasing interest in appearance, the market for skin beauty devices is growing; in particular, non-invasive methods are gaining popularity due to the low safety standards and high patient resistance associated with invasive procedures. Furthermore, efficient delivery methods for skin beauty agents are currently being researched in the field, as the characteristics of the skin barrier make it difficult for external agents to be fully absorbed.

[0003] The skin barrier plays a crucial role in maintaining homeostasis by defending against the penetration of external substances and preventing internal moisture loss. The stratum corneum, the outermost layer of the skin, is a key component of this barrier and consists of corneocytes and the surrounding lipids. This structure is often described by the "brick and mortar" model, where the corneocytes—corresponding to the bricks—are tightly bound together, with lipids such as fatty acids, cholesterol, and ceramides filling the spaces between them, forming a defensive layer that is difficult for substances to pass through.

[0004] The lipid components of the skin barrier are primarily composed of hydrophobic substances, which can make it difficult for water-soluble substances to pass through. In other words, water-soluble ingredients struggle to penetrate the stratum corneum. On the other hand, fat-soluble ingredients can be absorbed relatively better, but even these are not open enough for all molecules to pass through.

[0005] Furthermore, the stratum corneum has a very thin yet tightly bonded structure that prevents external substances from easily passing through randomly. This structure acts as a physical barrier, effectively blocking the absorption of external substances. In particular, substances with large molecular weights are even more difficult to absorb.

[0006] Due to these characteristics, externally applied cosmetic agents are not fully absorbed; they may act only on the skin surface or take a long time to be absorbed. To compensate for this, technologies such as electrical signals (e.g., iontophoresis, ultrasound, electroporation) and chemical penetration enhancers (e.g., surfactants, liposomes) are being developed. These technologies play a role in helping agents be absorbed into the skin more effectively by temporarily altering the skin barrier.

[0007] However, the development of home-use beauty devices is inevitably limited by factors such as price and size. Consequently, there have been issues where skin care products are not delivered evenly to the skin or are difficult to apply accurately to the desired areas. Furthermore, removing and replacing the cartridges that hold and allow for the exchange of skin care products is a complex process or requires separate tools, causing inconvenience to the user. Additionally, leakage of the skin care product or contamination of the user's hands can occur during the removal and replacement process. Moreover, impacts generated during use are directly transmitted to the user's skin, causing discomfort or reducing the device's durability. Additionally, if the structure for transporting the skin care product forward consists of a single screw, transport precision is reduced due to screw backlash, and the product may retract or be transported unevenly due to the reaction force applied to the skin during use. Furthermore, when a cushioning function is applied to the main unit, the cartridge unit itself retracts, leading to the unintentional transfer of the skin care product to the front edge of the cartridge unit during use.

[0008] Meanwhile, the aforementioned prior art is technical information that the inventor possessed for the purpose of deriving the present disclosure or acquired during the process of deriving the present disclosure, and it cannot necessarily be considered publicly known technology disclosed to the general public prior to the filing of the present disclosure. Prior art literature

[65535] International Publication WO2024 / 186107 (Published Sep. 12, 2024) US Patent Application Publication US2026 / 0060404 (Published March 5, 2026) Korean Published Patent Application No. 10-2024-0160507 (Published Nov. 11, 2024) Korean Registered Patent Application No. 10-1980736 (Published May 21, 2019) The problem to be solved

[0009] Accordingly, the present invention was developed to solve the problems described above, and aims to provide a cartridge unit for the penetration of a skin care product, wherein screw play for transporting the skin care product is eliminated, transport is simple and efficient, a cartridge in which the skin care product has been completely consumed can be removed and replaced with a new one in a single operation, and cushioning of the skin care product itself is provided during use. means of solving the problem

[0010] A cartridge unit for penetrating a skin cosmetic formulation according to one embodiment of the present invention comprises: a transfer nut extending along one axis and having a threaded groove on its inner surface; a transfer screw guide received inside the transfer nut and having a guide hole extending parallel to the one axis; and a transfer screw received inside the transfer screw guide and having a helical projection that is screw-coupled to the threaded groove through the guide hole; wherein when the transfer nut is rotated around the one axis, the transfer screw is constrained in the guide hole and does not rotate, but is transferred along the one axis.

[0011] The above-mentioned feed screw includes a first feed member and a second feed member capable of relative movement in the direction of the above-mentioned axis and unable to rotate relative to the above-mentioned axis, and the helical projection includes a first helical projection provided on the outer side of the first feed member and a second helical projection provided on the outer side of the second feed member, and an elastic body may be interposed between the first feed member and the second feed member.

[0012] The phases of the first spiral protrusion and the second spiral protrusion are the same, or if there is a difference in phase, the difference can be maintained at a constant level.

[0013] The first spiral projection may be in close contact with the front surface of the screw groove, and the second spiral projection may be in close contact with the rear surface of the screw groove.

[0014] The front surface of the first spiral projection may be parallel to the front surface of the screw groove, and the rear surface of the second spiral projection may be parallel to the rear surface of the screw groove.

[0015] The first spiral projection can be compressed to a restorable state while receiving resistance from the elastic body when an external force acts along the axis from the front to the rear.

[0016] The above feed screw may be provided with a guide projection disposed within the guide hole to guide the movement of the feed screw in the uniaxial direction.

[0017] The above guide projection can be integrally provided on the inner side of the above spiral projection.

[0018] Between the above-mentioned transfer nut and the above-mentioned transfer screw guide, a rotation guide ring may be interposed that is rotatable relative to at least one of the above-mentioned transfer nut and the above-mentioned rotation guide ring, and limits the relative movement of the above-mentioned transfer nut and the above-mentioned rotation guide ring in the above-mentioned axial direction.

[0019] In front of the above-mentioned transfer nut, a recess for coupling and a recess for coupling guide are provided for coupling the above-mentioned rotation guide ring, and on the outer surface of the above-mentioned rotation guide ring, a coupling hook corresponding to the recess for coupling and a coupling guide protrusion corresponding to the recess for coupling guide are provided, and on the inner surface, a rotation guide projection or a rotation guide groove is provided, and on the outer surface of the above-mentioned transfer screw guide, a rotation guide groove corresponding to the rotation guide projection or a rotation guide projection corresponding to the rotation guide groove may be provided.

[0020] The above feed screw guide may be provided with a stop hole that extends in the uniaxial direction and has a convex portion, and the feed screw may be provided with a stop projection that moves along the stop hole and engages with the convex portion.

[0021] The above-mentioned stopper projection can be connected to the above-mentioned transfer screw through a connecting part capable of elastic deformation.

[0022] A beauty device for the penetration of a skin beauty preparation according to one embodiment of the present invention is characterized by including the cartridge unit.

[0023] A beauty device for the penetration of a skin beauty agent, wherein a cartridge unit according to one embodiment of the present invention is detachably coupled to a main body unit, wherein the main body unit comprises: a housing extending along one axis; and a rotating part provided to be rotatable relative to the housing around the one axis; and wherein the cartridge unit comprises: a transfer nut rotated by the rotation of the rotating part; and a transfer screw guide not rotated by the housing; and wherein the skin beauty agent is transferred forward by the rotation of the transfer nut and the non-rotation of the transfer screw guide.

[0024] The above main body unit may further include a removal part that is provided to be movable relative to the housing along the above axis to remove the cartridge unit.

[0025] A rotating rib that is detachably coupled to the rear of the above-mentioned transfer nut and cannot rotate relative to the rotating part of the main body unit may be provided.

[0026] An anti-detachment projection is provided on the outer surface of the transfer nut, and an anti-detachment groove corresponding to the anti-detachment projection may be provided on the inner surface of the rotation holder of the main body unit.

[0027] A rib or groove for preventing rotation is provided on the front surface of the above housing, and

[0028] On the rear surface of the locking projection protruding outward from the above-mentioned transfer screw guide, a rotation-prevention groove corresponding to the rotation-prevention rib of the housing may be provided, or a rotation-prevention projection corresponding to the rotation-prevention groove of the housing may be provided. Effects of the invention

[0029] According to an embodiment of the present invention, a spiral projection is closely attached to the front and rear of the screw groove by an elastic body, thereby eliminating screw clearance.

[0030] In addition, a cartridge containing all the skin care ingredients can be removed and replaced with a new one in a single operation.

[0031] In addition, convenience and efficiency are improved by providing buffering for the skin care formulation itself during the use of the device, and contamination of the cartridge unit can be prevented.

[0032] Furthermore, other effects that can be obtained or predicted by the embodiments of the present invention will be disclosed directly or implicitly in the detailed description of the embodiments of the present invention. That is, various effects predicted according to the embodiments of the present invention will be disclosed within the detailed description that follows. Brief explanation of the drawing

[0033] FIG. 1 is a perspective view showing a beauty device for penetrating a skin beauty preparation according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of a cartridge unit for the penetration of a skin care formulation according to one embodiment of the present invention. Figure 3 is a cross-sectional view of a feed nut. Figure 4 is a drawing illustrating the combination of a rotary guide ring and a feed screw guide. Figure 5 is a drawing illustrating the combination of a transfer nut and a rotary guide ring. Figure 6 is a drawing showing a feed screw. FIG. 7 is a drawing showing a feed screw guide and a feed screw according to one embodiment of the present invention. Figure 8 is a cross-sectional view of a feed screw guide and a feed screw joined together. Figure 9 is a cross-sectional view of a feed nut and a feed screw joined together. Figure 10 is a diagram illustrating the transfer of a skin care product. Figure 11 is a drawing illustrating the threads of the feed nut and the helical projections of the feed screw. FIG. 12 is a partial cross-sectional view of a cartridge unit to illustrate the buffering of the cartridge unit. FIG. 13 is a cross-sectional view of a cartridge unit and a main body unit combined with each other. FIG. 14 is a diagram illustrating the prevention of detachment when the cartridge unit and the main body unit are coupled, and the transmission of rotational force from the main body unit to the cartridge unit when the user operates the main body unit. FIG. 15 is a drawing to explain the non-rotation of the feed screw guide when the user operates the main body unit. Specific details for implementing the invention

[0034] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0035] Prior to this, it should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, and that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0036] To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0037] Since the size and thickness of each component shown in the drawings may be expressed arbitrarily for convenience and clarity of explanation, the present invention is not necessarily limited to what is shown in the drawings.

[0038] Throughout the specification, when a part is described as “comprising” a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may further include the said component.

[0039] In addition, terms such as “...unit,” “...means,” “...part,” “...part,” and “...module” as described in the specification refer to a unit of comprehensive configuration that performs at least one function or operation.

[0040] Additionally, the term “horizontal” or a similar term as described in the specification refers to a direction approximately horizontal to the surface of the user’s skin when the beauty device for the penetration of a skin beauty agent according to the present invention is used, and the term “vertical” or a similar term refers to a direction approximately perpendicular to the surface of the user’s skin when the beauty device for the penetration of a skin beauty agent according to the present invention is used.

[0041] Additionally, the term “front” or a similar term as described in the specification refers to the direction toward the surface of the user’s skin when the beauty device for the penetration of a skin beauty agent according to the present invention is used, and the term “rear” or a similar term refers to the opposite direction of the said front.

[0043] Hereinafter, a beauty device for the penetration of a skin beauty agent according to one embodiment of the present invention will be described with reference to FIG. 1.

[0044] FIG. 1 is a perspective view showing a beauty device for penetrating a skin beauty agent according to one embodiment of the present invention, where FIG. 1 (a) is a drawing showing each component separated, and FIG. 1 (b) is a drawing showing each component combined.

[0045] Referring to FIG. 1, a beauty device for penetration of a skin beauty preparation according to one embodiment of the present invention may include a cartridge unit (100), a main body unit (200), and a cap unit (300).

[0046] A skin care product (scp) can be accommodated in the cartridge unit (100). When the skin care product (scp) is depleted through use, the user can replace the cartridge unit (100) for continued use.

[0047] The main body unit (200) may include an electrode (ea, eb) for applying an electrical signal and a signal generating circuit for generating an electrical signal applied to the electrode. The signal generating circuit may be a control board, etc.

[0048] The cartridge unit (100) can be detachably coupled to the main body unit (200). When the skin care preparation (scp) contained in the cartridge unit (100) is completely depleted by use, the user can replace the cartridge unit (100) and use it.

[0049] A beauty device for the penetration of a skin beauty agent according to the present invention enables the skin beauty agent (SCP) to be absorbed more easily into the user's skin by simultaneously supplying an electrical signal and a skin beauty agent (SCP) to the user's skin.

[0050] The above electrical signal may be a microcurrent, high voltage, low frequency, high frequency, pulsed electric field, etc., and may refer to any electrical signal that helps the skin care agent (SCP) to be easily absorbed into the user's skin or is helpful for skin care.

[0051] The cap unit (300) can be detachably coupled to the main body unit (200). The user can detach the cap unit (300) to use the device, and when not in use, can attach the cap unit (300) to prevent contamination of the skin care agent (scp) and electrodes (ea, eb).

[0052] Hereinafter, with reference to FIG. 2, a cartridge unit for the penetration of a skin beauty preparation according to the present invention will be described.

[0053] FIG. 2 is an exploded perspective view of a cartridge unit for the penetration of a skin care formulation according to one embodiment of the present invention.

[0054] The cartridge unit may include a feed nut (110), a feed screw guide (130), and a feed screw (150).

[0055] The feed nut (110) extends along one axis (x1) and may have a thread groove (111) on its inner surface. The feed screw guide (130) is received inside the feed nut (110) and may have a guide hole (131) that extends parallel to one axis (x1). The feed screw (150) is received inside the feed screw guide (130) and may have a spiral projection (152, 157) that is screw-coupled to the thread groove (111) through the guide hole (131).

[0056] Accordingly, when the transfer nut (110) rotates around the axis (x1), the transfer screw (150) is constrained in the guide hole (131) and can be transferred along the axis (x1) without rotating.

[0057] Additionally, the feed screw (150) may be provided with guide projections (153, 158). The guide projections (153, 158) are positioned within the guide hole (131) of the feed screw guide (130) to guide the movement of the feed screw (150) in the direction of one axis (x1). The guide projections (153, 158) may extend in the direction of one axis (x1).

[0058] In one aspect, the guide projection (153, 158) may be integrally formed on the inner side of the spiral projection (152, 157). By doing so, the spiral projection (152, 157), which receives an external force directly by the rotation of the transfer nut (110), can be guided more effectively along the guide hole (131) in the direction of the axis (x1).

[0059] Meanwhile, a rotary guide ring (121) may be interposed between the feed nut (110) and the feed screw guide (130). The rotary guide ring (121) may be integrally coupled with the feed nut (110) and may be coupled to the feed screw guide (130) so as to be rotatable relative to it. However, it is not limited thereto, and the rotary guide ring (121) may be rotatable relative to at least one of the feed nut (110) and the feed screw guide (130) and may limit relative movement of the feed nut (110) and the feed screw guide (130) in the direction of one axis (x1).

[0060] The feed screw (150) may include a first feed member (151) and a second feed member (156) capable of relative movement in the direction of one axis (x1). An elastic body (eo1), such as a spring, may be interposed between the first feed member (151) and the second feed member (156).

[0061] A skin care product (scp) can be fixed in front of the transfer screw (150). For the fixation, a fixing hook (fh) may be interposed between the transfer screw (150) and the skin care product (scp).

[0062] Hereinafter, with reference to FIG. 3, the transfer nut (110) shown in FIG. 2 will be described.

[0063] Figure 3 is a cross-sectional view of a transfer nut (110).

[0064] As described above, a screw groove (111) may be provided spirally on the inner surface of the feed nut (110). A spiral projection (152, 157) of the feed screw (150) may be screw-coupled to the screw groove (111).

[0065] A recessed portion (112) for coupling and a recessed portion (113) for coupling guide may be provided at the front of the transfer nut (110) for coupling a rotation guide ring (121). The recessed portion (112) for coupling is shown as a closed hole shape and the recessed portion (113) for coupling guide is shown as a hole shape with an open front, but is not limited thereto and may be provided in a groove shape.

[0066] A rotational rib (114) may be provided at the rear of the transfer nut (110). The rotational rib (114) may be detachably and incapable of relative rotation to the rotational holder (250) of the main body unit (200). When the rotational holder (250) is rotated, the transfer nut (110) may also be rotated.

[0067] Hereinafter, with reference to FIG. 4, the rotary guide ring (121) and the feed screw guide (130) shown in FIG. 2 will be described.

[0068] FIG. 4 is a drawing for explaining the combination of a rotary guide ring (121) and a feed screw guide (130). Specifically, FIG. 4 (a) and FIG. 4 (b) are drawings showing the rotary guide ring (121) and the feed screw guide (130) separated, and FIG. 4 (c) and FIG. 4 (d) are drawings showing the rotary guide ring (121) and the feed screw guide (130) combined.

[0069] A rotation guide projection (122) may be provided on the inner surface of the rotation guide ring (121). Additionally, a rotation guide groove (132) may be provided on the outer surface of the feed screw guide (130). When the rotation guide ring (121) and the feed screw guide (130) are coupled together, the rotation guide projection (122) may be inserted into the rotation guide groove (132). Then, the rotation guide ring (121) and the feed screw guide (130) may be coupled together so as to be rotatable relative to each other.

[0070] In order to allow elastic deformation during the above coupling, a slit (123) may be provided in the rotation guide projection (122) in the axial direction, thereby making the coupling easier despite the rotation guide projection (122).

[0071] Meanwhile, FIG. 4 is illustrated and described as having a rotation guide projection (122) on the inner surface of the rotation guide ring (121) and a rotation guide groove (132) on the outer surface of the feed screw guide (130), but it is also possible to have a rotation guide groove on the inner surface of the rotation guide ring and a rotation guide projection on the outer surface of the feed screw guide (130).

[0072] Hereinafter, with reference to FIG. 5, the transfer nut (110) and the rotary guide ring (121) shown in FIG. 2 will be described.

[0073] FIG. 5 is a drawing for explaining the combination of a transfer nut (110) and a rotary guide ring (121), where FIG. 5 (a) is a drawing showing a cartridge unit (100) viewed from one direction, and FIG. 5 (b) is a drawing showing a cross-sectional view of a cartridge unit (100) viewed from a direction rotated 90 degrees around an axis (x1).

[0074] As described above, a recessed portion (112) for coupling and a recessed portion (113) for coupling guide may be provided in front of the transfer nut (110). Additionally, a coupling hook (124) corresponding to the recessed portion (112) for coupling and a coupling guide protrusion (125) corresponding to the recessed portion (113) for coupling guide may be provided on the outer surface of the rotation guide ring (121).

[0075] When the protrusion (125) for the coupling guide moves along the recess (113) for the coupling guide, the coupling hook (124) can be easily fastened to the recess (112) for the coupling. Accordingly, the transfer nut (110) and the rotation guide ring (121) can be coupled to each other so that they cannot rotate relative to one another.

[0076] Meanwhile, as described above, the rotary guide ring (121) can be coupled to the feed screw guide (130) so as to be rotatable relative to each other. Accordingly, the feed nut (110) is coupled to the rotary guide ring (121) so as not to be rotatable relative to each other, and since the rotary guide ring (121) is coupled to the feed screw guide (130) so as to be rotatable relative to each other, the feed nut (110) and the feed screw guide (130) can be coupled to each other so as to be rotatable relative to each other.

[0077] Additionally, the transfer nut (110) is constrained to the rotation guide ring (121) by means of a coupling recess (112) and a coupling hook (124), thereby restricting relative movement in the axial direction (x1), and the transfer screw guide (130) is constrained to the rotation guide ring (121) by means of a guide projection (122) and a rotation guide groove (132), thereby restricting relative movement in the axial direction (x1). Accordingly, the transfer nut (110) and the transfer screw guide (130) can be restricted from relative movement in the axial direction (x1).

[0078] Thus, the transfer nut (110) and the transfer screw guide (130) can be joined together so that they are rotatable relative to each other and their movement in the axis (x1) direction is restricted.

[0079] Referring to FIG. 6 below, the feed screw (150) shown in FIG. 2 will be described.

[0080] FIG. 6 is a drawing showing a feed screw (150), FIG. 6(a) is a drawing showing the side of the feed screw, FIG. 6(b) is a drawing showing the front of the feed screw, FIG. 6(c) is a drawing showing a cross-section taken of the line of FIG. 6(b), and FIG. 6(d) is a drawing showing a cross-section taken of the line of FIG. 6(b).

[0081] As described above, the transfer screw (150) may include a first transfer member (151) and a second transfer member (156). An elastic body (eo1), such as a spring, may be interposed between the first transfer member (151) and the second transfer member (156), and the first transfer member (151) and the second transfer member (156) may be compressed and restored in the direction of an axis (x1) by the elastic body (eo1). Additionally, the first transfer member (151) and the second transfer member (156) may be coupled so as not to rotate around the axis (x1).

[0082] A first spiral projection (152) may be provided on the outer side of the first transfer member (151). The first spiral projection (152) may be screw-coupled to the thread groove (111) of the transfer nut (110) through the guide hole (131) of the transfer screw guide (130). As shown in FIG. 6, two first spiral projections (152) may be provided in positions facing each other, but are not limited thereto.

[0083] A second spiral projection (157) may be provided on the outer side of the second transfer member (156). The second spiral projection (157) may be screw-coupled to the thread groove (111) of the transfer nut (110) through the guide hole (131) of the transfer screw guide (130). As shown in FIG. 6, two second spiral projections (157) may be provided in positions facing each other, but are not limited thereto.

[0084] Meanwhile, the first transfer member (151) may be provided with a first guide projection (153). The first guide projection (153) is positioned within the guide hole (131) of the transfer screw guide (130) to guide the movement of the transfer screw (150) in the direction of one axis (x1). The first guide projection (153) may be extended in the direction of one axis (x1).

[0085] In one aspect, the first guide projection (153) may be integrally formed on the inner side of the first spiral projection (152). By doing so, the first spiral projection (152), which receives an external force directly according to the rotation of the transfer nut (110), can be guided more effectively along the guide hole (131) in the direction of the axis (x1).

[0086] Additionally, the second transfer member (156) may be provided with a second guide projection (158). The second guide projection (158) may be disposed within the guide hole (131) of the transfer screw guide (130) to guide the movement of the transfer screw (150) in the direction of one axis (x1). The second guide projection (158) may be extended in the direction of one axis (x1).

[0087] In one aspect, the second guide projection (158) may be integrally formed on the inner side of the second spiral projection (157). By doing so, the second spiral projection (157), which receives an external force directly according to the rotation of the transfer nut (110), can be guided more effectively along the guide hole (131) in the direction of the axis (x1).

[0088] Meanwhile, a stopping projection (159) may be provided on the feed screw (150). The stopping projection (159) may be connected to the feed screw (150) through a connecting part (159a) that is elastically deformable for radial micro-movement.

[0089] Hereinafter, the coupling and relative movement of the feed screw guide (130) and the feed screw (150) shown in FIG. 2 will be described with reference to FIG. 7 and FIG. 8.

[0090] FIG. 7 is a drawing showing a feed screw guide (130) and a feed screw (150) according to an embodiment of the present invention, where FIG. 7 (a) shows the feed screw guide and the feed screw separated, and FIG. 7 (b) shows the feed screw guide and the feed screw combined. FIG. 8 is a cross-sectional view of the feed screw guide and the feed screw combined with each other, where FIG. 8 (a) is a cross-sectional view taken along line CC of FIG. 7, FIG. 8 (b) is a cross-sectional view showing the feed screw moved forward, and FIG. 8 (c) is a cross-sectional view taken along line DD of FIG. 7.

[0091] The feed screw (150) can be accommodated inside the feed screw guide (130). The helical projections (152, 157) of the feed screw (150) can protrude outward from the guide hole (131) of the feed screw guide (130). Additionally, the guide projections (153, 158) of the feed screw (150) can be placed within the guide hole (131) of the feed screw guide (130). Then, as shown in FIG. 8 (a) and (b), the feed screw (150) can be moved along the guide hole (131) in an axial direction (x1).

[0092] Referring to FIG. 7 (b) and FIG. 8 (c), the feed screw guide (130) may be provided with a stop hole (133) extending in a uniaxial direction. A convex portion (133a) may be provided along the uniaxial direction (x1) in the stop hole (133).

[0093] When the feed screw (150) moves in the direction of the axis (x1) within the feed screw guide (130), the stop projection (159) of the feed screw (150) continues to engage with the convex portion (133a). Accordingly, stepwise movement of the feed screw (150) is possible, and stepwise transfer of the skin care product (scp) by the feed screw (150) is possible.

[0094] The above stepwise transfer means that when a user operates the main body unit (200) to transfer the transfer screw (150) and the skin care agent (scp) and rotates the transfer nut (110), the transfer nut (110) is rotated at regular intervals or requires a greater force to be applied, and accordingly, the transfer is stopped or requires a greater force to be applied to transfer. Through the above stepwise transfer, the user can transfer and use the skin care agent (scp) in fixed amounts according to the usage method of the beauty device for the penetration of the skin care agent according to the present invention.

[0095] Meanwhile, as described above, the stopping projection (159) can be connected to the feed screw (150) through a connecting part (159a) that is elastically deformable for radial micro-movement. By doing so, damage to the part or the requirement of excessive force can be prevented as the stopping projection (159) passes through the convex part (133a).

[0096] Hereinafter, the connection and relative rotation of the feed nut (110) and the feed screw (150) will be described with reference to FIG. 9.

[0097] FIG. 9 is a cross-sectional view of a feed nut (110) and a feed screw (150) joined together, FIG. 9 (a) is a cross-sectional view of a first helical projection, and FIG. 9 (b) is a cross-sectional view of a second helical projection. A feed screw guide (130) may be placed between the feed nut (110) and the feed screw (150), but the illustration of the feed screw guide (130) is omitted in FIG. 9.

[0098] As described above, the transfer screw (150) may include a first transfer member (151) and a second transfer member (156). An elastic body (eo1), such as a spring, may be interposed between the first transfer member (151) and the second transfer member (156).

[0099] Referring to FIG. 9 (a), the first spiral projection (152) of the first transfer member (151) can be screw-coupled to the thread groove (111) of the transfer nut (110). Additionally, the first spiral projection (152) can be pushed forward by the elasticity of the elastic body (eo1) and come into close contact with the front surface (111a) of the thread groove (111).

[0100] Referring to FIG. 9 (b), the second spiral projection (157) of the second transfer member (156) can be screw-coupled to the thread groove (111) of the transfer nut (110). Additionally, the second spiral projection (157) can be pushed toward the rear side by the elasticity of the elastic body (eo1) and come into close contact with the rear surface (111b) of the thread groove (111).

[0101] When the transfer nut (110) is rotated around an axis (x1) by the operation of the user's main body unit (200) and the transfer screw (150) is constrained to the transfer screw guide (130) and does not rotate, the first transfer member (151) and the second transfer member (156) are guided in the screw groove (111) and the transfer screw (150) can move along the axis (x1).

[0102] Hereinafter, with reference to FIG. 10, the transfer of a skin care product (scp) will be described.

[0103] FIG. 10 is a drawing for explaining the transfer of a skin care product (scp), FIG. 10 (a) is a drawing showing a cartridge unit (100), FIG. 10 (b) is a cross-sectional view of the cartridge unit (100), and FIG. 10 (c) is a cross-sectional view of the cartridge unit in a state where the skin care product (scp) has been transferred forward.

[0104] When the transfer nut (110) is rotated around an axis (x1) by the operation of the user's main body unit (200), the transfer screw (150) is constrained by the transfer screw guide (130) and does not rotate, and can move along the axis (x1). Depending on the movement of the transfer screw (150), the skin care preparation (scp) can also be transferred forward.

[0105] As the skin care product (scp) is gradually consumed with use, the user can move the skin care product (scp) forward by rotating the transfer nut (110) through the operation of the main body unit (100). That is, when the skin care product (scp) in the front is consumed, the user can continue to use the skin care product (scp) by moving the skin care product (scp) in the rear forward. And when all the skin care product (scp) is consumed, the used cartridge unit (100) can be replaced with a new cartridge unit (100) for use.

[0106] Meanwhile, the non-rotation of the transfer screw guide (130) can be provided by coupling with the main body unit (100), and this will be described later.

[0107] Hereinafter, with reference to FIG. 11, the threads (111) of the feed nut (110) and the helical protrusions (152, 157) of the feed screw (150) will be described.

[0108] FIG. 11 is a drawing for explaining screw threads (111) and spiral protrusions (152, 157), FIG. 11 (a) is a transparent drawing showing the outer surface of a transfer nut (110) so that screw threads (111) and spiral protrusions (152, 157) are visible in the cartridge unit (100), and FIG. 11 (b) is a planar drawing showing the arrangement of screw threads (111) and spiral protrusions (152, 157).

[0109] The phases of the first spiral projection (152) and the second spiral projection (157) are the same as each other, or if there is a difference in phase, the difference can be maintained at a constant level.

[0110] As illustrated in FIG. 11, when the screw groove (111) is provided as a single spiral, the phases of the first spiral projection (152) and the second spiral projection (157) can be synchronized. That is, the first spiral projection (152) and the second spiral projection (157) can be screwed into one screw groove (111).

[0111] Meanwhile, although not illustrated, if the screw groove (111) is provided as a double helix, the phase difference between the first helical projection (152) and the second helical projection (157) can be maintained at 180 degrees. Then, the first helical projection (152) can be screw-coupled to the first screw groove, and the second helical projection (157) can be screw-coupled to the second screw groove.

[0112] Additionally, when the screw groove (111) is provided as a triple helix, the phase difference between the first helical projection (152) and the second helical projection (157) can be maintained at 120 degrees or 240 degrees. Then, the first helical projection (152) can be screw-coupled to the first screw groove and the second helical projection (157) can be screw-coupled to the second screw groove, or the first helical projection (152) can be screw-coupled to the first screw groove and the second helical projection (157) can be screw-coupled to the third screw groove.

[0113] Accordingly, the first spiral projection (152) and the second spiral projection (157) are screw-coupled to the screw groove (111) even though they are separated from each other in the direction of the axis (x1), and the feed screw (150) can be moved in the direction of the axis (x1) by the rotation of the feed nut (110).

[0114] By means of an elastic body (eo1), the first spiral projection (152) can be in contact with the front surface (111a) of the screw thread (111), and the second spiral projection (157) can be in contact with the rear surface (111b) of the screw thread. By this, the first spiral projection (152) and the second spiral projection (157), separated in the direction of one axis (x1), can be screwed into the screw thread (111) like a single screw thread.

[0115] The front surface (152a) of the first spiral projection (152) may be parallel to the front surface (111a) of the screw thread (111), and the rear surface (157b) of the second spiral projection (157) may be parallel to the rear surface (111b) of the screw thread (111). By doing so, the feed screw (150) can be moved more smoothly in the direction of the axis (x1) by the rotation of the feed nut (110).

[0116] Hereinafter, the buffering of the cartridge unit (100) will be described with reference to FIG. 12.

[0117] FIG. 12 is a partial cross-sectional view of a cartridge unit to explain the cushioning of the cartridge unit (100), FIG. 12 (a) is a cross-sectional view showing the first spiral projection (152) when no external force is applied, FIG. 12 (b) is a cross-sectional view showing the first spiral projection (152) when an external force is applied, and FIG. 12 (c) is a cross-sectional view showing the second spiral projection (157) when an external force is applied or not applied.

[0118] Referring to FIG. 12 (a) and FIG. 12 (c), in a state where no external force is applied, the first spiral projection (152) of the first transfer member (151) can be pressed against the front surface (111a) of the thread groove (111) of the transfer nut (110) by the elastic force of an elastic body (eo1), such as a spring.

[0119] On the other hand, referring to FIG. 12 (b), when an external force acts on the skin cosmetic preparation (scp) along an axis (x1) from the front to the rear, the first spiral projection (152) can be moved to the rear side by a predetermined distance (d1) and compressed while receiving resistance from the elastic body (eo1). Then, when the action of the external force is released, the first spiral projection (152) can be restored to the state shown in FIG. 12 (c).

[0120] Meanwhile, referring to FIG. 12 (c), regardless of whether the external force is applied, the second spiral projection (157) of the second transfer member (156) can be maintained in a state of close contact with the rear surface (111b) of the thread groove (111) of the transfer nut (110) by the elastic force of an elastic body (eo1), such as a spring. By maintaining its position, the second transfer member (156) can provide resistance force to the first transfer member (151) when the external force is applied, and a restoring force when the external force is released.

[0121] As a result of this effect, when a user combines the cartridge unit (100) with the main body unit (200) for use, force can be applied forward to adhere the skin care agent (scp) of the cartridge unit (100) to the skin. Then, the skin care agent (scp) receives an external force toward the rear. In this case, the skin care agent (scp) can be moved backward by a predetermined distance (d1) while receiving resistance due to the elastic force of the elastic body (eo1). Then, as the external force weakens or is removed, the skin care agent (scp) can be moved forward by the elastic force and restored. This provides the user with a cushioning effect for the skin care agent (scp).

[0122] Additionally, when the user operates the main body unit (200) to rotate the transfer nut (110) to transfer the skin care product (scp), the skin care product (scp) may be transferred to the forward side slightly more than necessary compared to subsequent uses. In this case, the skin care product (scp) may be overused or deformed, but the skin care product (scp) can be moved to the rear during use by the buffering, thereby preventing overused use or deformation of the skin care product (scp).

[0123] In addition, even when the device is used on areas where the surface of the skin is uneven or protrudes more than other parts, such as the cheekbones or jaw, the skin cosmetic agent (scp) can be evenly applied to the entire skin by the buffering described above.

[0124] Hereinafter, with reference to FIGS. 13 to 15, the mutual coupling of the cartridge unit (100) and the main body unit (200), rotation and non-rotation during user operation, and removal of the cartridge unit (100) will be described.

[0125] FIG. 13 is a cross-sectional view of a cartridge unit (100) and a main body unit (200) combined with each other. FIG. 14 is a drawing for explaining the prevention of detachment when the cartridge unit (100) and the main body unit (200) are combined, and the transmission of rotational force from the main body unit (100) to the cartridge unit (100) when the user operates the main body unit (100). FIG. 14 (a) is a drawing showing the cross-section of the combined transfer nut (110) and the rotation holder (250) and the front side of the rotation holder (250), and FIG. 14 (b) is a drawing showing the overall shape of the rear side of the cartridge unit (100). FIG. 15 is a drawing for explaining the non-rotation of the transfer screw guide (130) when the user operates the main body unit (100).

[0126] Referring to FIG. 13, the main body unit (200) may include a housing (210), a rotating part, and a detachable part.

[0127] The housing (210) extends along one axis (x1) and may have an internal space in which other parts can be accommodated.

[0128] The rotating part may be provided to be rotatable relative to the housing (210) around an axis (x1).

[0129] The above-mentioned rotating part may include a rotating knob (230), a rotating joint (240), and a rotating holder (250). The rotating knob (230), the rotating joint (240), and the rotating holder (250) may be sequentially and detachably combined or provided as a single unit.

[0130] The rotary knob (230) can be rotated around an axis (x1) by operation of the user. As the skin care product (scp) is gradually consumed with use, the user can rotate the rotary knob (230) to move the skin care product (scp) forward. That is, when the skin care product (scp) in the front is consumed, the user can rotate the rotary knob (230) to move the skin care product (scp) in the rear forward, thereby allowing the user to continue using the skin care product (scp). And when all the skin care product (scp) is consumed, the cartridge unit (100) that was in use can be replaced with a new cartridge unit (100) for use.

[0131] The rotation joint (240) and the rotation holder (250) can be rotated together with the rotation knob (230). The rotational rib (114) of the cartridge unit (100) can be coupled to the rotation holder (250) so as not to rotate relative to one axis (x1).

[0132] When the rotation knob (230), rotation joint (240), and rotation holder (250) of the main body unit (200) are rotated around an axis (x1), the rotation rib (114) of the cartridge unit (100) is rotated around an axis (x1) and the transfer nut (110) can also be rotated around an axis (x1).

[0133] Meanwhile, the above removal unit may include a cartridge removal button (270) and a rotary guide shaft (280).

[0134] The above removal part may be provided to be movable relative to the housing (210) along one axis (x1). Additionally, an elastic body (eo2), such as a spring, that provides elastic force in the direction of one axis (x1) may be interposed between the rotational joint (240) and the cartridge removal button (270). Due to the elastic force of the elastic body (eo2), the cartridge removal button (270) is positioned on the rear side, but moves forward when an external force is applied to the front side, and moves back to the rear when the external force is removed.

[0135] A rotary guide shaft (280) extending along an axis (x1) may be coupled to the front of the cartridge removal button (270). A removal plate (281) may be detachably coupled or integrally provided to the front of the rotary guide shaft (280). The rotary guide shaft (280) may be positioned within the hollow of the rotary joint (240) to guide the rotation of the rotary joint (240) and the rotary holder (250).

[0136] When the user presses the removal button (270) forward along the axis (x1), the rotation guide shaft (280) and the removal plate (281) move forward, and thereby the cartridge unit (100) can be removed from the main body unit (200).

[0137] Referring to FIG. 14, a projection (115) for preventing detachment may be provided on the outer surface of the transfer nut (110). Additionally, a groove (251) for preventing detachment may be provided on the inner surface of the rotary holder (250). When the cartridge unit (100) is inserted into the rotary holder (250), the projection (115) for preventing detachment catches on the groove (251) for preventing detachment, thereby maintaining the coupled state between the cartridge unit (100) and the rotary holder (250). Furthermore, as described above, when the user presses the cartridge removal button (270), the coupled state can be released.

[0138] The rotation holder (250) may be provided with an insertion groove (252) into which a rotational rib (114) of a transfer nut (110) is inserted in the direction of one axis (x1). The rotational projection (114) is constrained in the insertion groove (252), so that when the rotation holder (250) rotates around one axis (x1), the transfer nut (110) can also rotate together.

[0139] Referring to FIG. 15, a rotation-prevention rib (211) is provided on the front of the housing (210), and a rotation-prevention groove (135) may be provided on the rear of a stopper (134) protruding outward from the feed screw guide (130) at a position corresponding to the rotation-prevention rib (211). When the cartridge unit (100) is coupled to the housing (210), the rotation-prevention rib (211) may be inserted into the rotation-prevention groove (135).

[0140] Accordingly, the transfer screw guide (130) may not rotate despite the rotation of the transfer nut (110), the transfer screw (150) may be guided by the transfer screw guide (130) and moved, and the skin cosmetic preparation (scp) may also be transferred forward.

[0141] Meanwhile, FIG. 14 is illustrated as having a groove (135) for preventing rotation in the feed screw guide (130) and a rib (211) for preventing rotation in the housing (210), but alternatively, a rib for preventing rotation may be provided in the feed screw guide (130) and a groove for preventing rotation may be provided in the housing (210).

[0143] As described above, although the present invention has been explained by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs. Explanation of the symbols

[0144] 100: Cartridge unit 110: Transfer nut 111: Screw bone 111a: Anterior surface of the thread 111b: Posterior surface of the thread 112: Recess for connection 113: Recess for coupling guide 114: Rotating rib 115: Anti-detachment protrusion 121: Rotary guide ring 122: Protrusion for rotation guide 123: Slit 124: Connecting hook 125: Protrusion for coupling guide 130: Feed screw guide 131: Guide Hole 132: Groove for rotation guide 133: Stop hole 133a: Convex part 134: Stopper 135: Anti-rotation groove 150: Feed screw 151: First transfer member 152: First spiral projection 152a: Anterior surface of the first spiral projection 153: First guide projection 156: Second transfer member 157: Second spiral projection 157b: Posterior surface of the second spiral projection 158: Second guide projection 159: Stopping protrusion 159a: Connection 200: Main body unit 210: Housing 211: Anti-rotation rib 230: Rotary knob 240: Rotating joint 250: Rotating holder 251: Anti-slip groove 252: Insertion Home 254: Rotating holder (mentioned separately in the text) 270: Cartridge removal button 280: Rotary guide shaft 281: Removal plate 300: Cap Unit d1: Specific distance ea: electrode eb: electrode eo1: elastic body eo2: elastic body fh: Fixing hook SCP: Skin care products x1: Uniaxial direction

Claims

Claim 1 delete Claim 2 A cartridge unit for the penetration of a skin care product, comprising: a transfer nut extending along a single axis and having a screw groove on its inner surface; a transfer screw guide received inside the transfer nut and having a guide hole extending parallel to the single axis; and a transfer screw received inside the transfer screw guide and having a helical projection that is screw-coupled to the screw groove through the guide hole; wherein when the transfer nut rotates around the single axis, the transfer screw is constrained in the guide hole and is not rotated but is transferred along the single axis, and the transfer screw includes a first transfer member and a second transfer member capable of relative movement in the direction of the single axis and unable to rotate relatively around the single axis, and the helical projection includes a first helical projection provided on the outer side of the first transfer member and a second helical projection provided on the outer side of the second transfer member, and an elastic body interposed between the first transfer member and the second transfer member. Claim 3 A cartridge unit for the penetration of a skin cosmetic agent according to paragraph 2, wherein the phases of the first spiral protrusion and the second spiral protrusion are identical, or if there is a difference in phase, the difference is maintained constant. Claim 4 A cartridge unit for the penetration of a skin cosmetic agent according to paragraph 2, wherein the first spiral projection is in close contact with the front surface of the screw groove and the second spiral projection is in close contact with the rear surface of the screw groove. Claim 5 A cartridge unit for the penetration of a skin cosmetic agent according to paragraph 2, wherein the front surface of the first spiral projection is parallel to the front surface of the screw groove, and the rear surface of the second spiral projection is parallel to the rear surface of the screw groove. Claim 6 In paragraph 2, the first spiral projection is a cartridge unit for the penetration of a skin cosmetic agent that is compressible and restoreable while receiving resistance from the elastic body when an external force acts along the axis from front to rear. Claim 7 delete Claim 8 A cartridge unit for the penetration of a skin care product, comprising: a transfer nut extending along a single axis and having a screw groove on its inner surface; a transfer screw guide received inside the transfer nut and having a guide hole extending parallel to the single axis; and a transfer screw received inside the transfer screw guide and having a helical projection that is screw-coupled to the screw groove through the guide hole; wherein when the transfer nut is rotated around the single axis, the transfer screw is constrained in the guide hole and is not rotated but is transferred along the single axis, and the transfer screw is provided with a guide projection disposed within the guide hole to guide the movement of the transfer screw in the direction of the single axis, and the guide projection is integrally provided on the inner side of the helical projection. Claim 9 delete Claim 10 delete Claim 11 A cartridge unit for the penetration of a skin care product, comprising: a transfer nut extending along a single axis and having a threaded groove on its inner surface; a transfer screw guide received inside the transfer nut and having a guide hole extending parallel to the single axis; and a transfer screw received inside the transfer screw guide and having a helical projection that is screw-coupled to the threaded groove through the guide hole; wherein when the transfer nut is rotated around the single axis, the transfer screw is constrained in the guide hole and does not rotate but is transferred along the single axis, the transfer screw guide is provided with a stop hole extending in the direction of the single axis and having a convex portion, and the transfer screw is provided with a stop projection that moves along the stop hole and engages with the convex portion. Claim 12 In claim 11, the above-mentioned stopping projection is a cartridge unit for the penetration of a skin cosmetic formulation connected to the above-mentioned transfer screw through an elastically deformable connecting part. Claim 13 A beauty device for the penetration of a skin beauty preparation comprising a cartridge unit according to any one of paragraphs 2 through 6, 8, 11 and 12. Claim 14 delete Claim 15 delete Claim 16 delete Claim 17 delete Claim 18 delete

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