Razor cartridge

Abstract

A razor cartridge according to an embodiment of the present invention comprises: a razor blade having a cutting edge formed at a tip; a frame that accommodates at least one of the razor blades in the longitudinal direction such that at least a portion of the cutting edge is exposed upward; a front support section that extends from the frame toward the front side toward which the cutting edge is oriented; a front lubrication member supported by the front support section; a rear support section extending from the frame toward the rear side; and a rear lubrication member supported by the rear support section. The front support section elastically supports the front lubrication member, and the rear support section elastically supports the rear lubrication member, and the strain on the rear support section with respect to the frame is less than the strain on the front support section with respect to the frame.

Description

razor cartridge

[0001] The present invention relates to a razor cartridge, and more particularly, to a razor cartridge having lubricating members provided at the front and rear of a razor blade.

[0002] There are razor cartridges that have shaving assist features added around the blades to protect the skin during the shaving process.

[0003] In particular, among products released as body razors, there are razor cartridges in which lubricating materials are placed in the front and back of the blades, or around the periphery of the blades.

[0004] These razor cartridges automatically apply lubricant around the shaved area during the shave process, eliminating the hassle of having to apply lubricant on purpose, and the soap that comes into contact with the skin before and after shaving makes the skin slippery, giving a smooth shave.

[0005] However, the shaving surface of these razor cartridges may become deformed due to wear and tear from soap, etc., and the shaving performance may not be properly achieved depending on the user's period of use and usage conditions.

[0006] There are razor cartridges that are configured to rotate the soap present at the front and back of the blade within a certain angle range relative to the blade depending on the force applied to the skin, but in these razor cartridges, the distance between the skin and the blade changes depending on the force applied to the razor cartridge by the user, and the degree of pressing of the front soap and the back soap varies depending on the direction of the force or the curvature of the skin, which may cause skin cuts, etc.

[0007] The problem to be solved by the present invention is to provide a razor cartridge that includes a lubricating member at the front and rear of a razor blade, and provides a safe and stable shaving performance while allowing a user to easily adjust the shaving performance.

[0008] The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

[0009] According to an embodiment of the present invention for solving the above problem, a razor cartridge includes a razor blade having a cutting edge formed at an end thereof, a frame for longitudinally accommodating at least one razor blade such that at least a portion of the cutting edge is exposed upward, a front support portion extending forward from the frame toward the cutting edge, a front lubricating member supported by the front support portion, a rear support portion extending rearward from the frame, and a rear lubricating member supported by the rear support portion, wherein the front support portion elastically supports the front lubricating member, and the rear support portion elastically supports the rear lubricating member, wherein a strain of the rear support portion with respect to the frame is smaller than a strain of the front support portion with respect to the frame.

[0010] According to an embodiment of the present invention for solving the above problem, a razor cartridge includes a razor blade having a cutting edge formed at an end thereof, a frame for longitudinally accommodating at least one razor blade such that at least a portion of the cutting edge is exposed upward, a front support portion extending forward from the frame toward the cutting edge, a front lubricating member supported by the front support portion, a rear support portion extending rearward from the frame, and a rear lubricating member supported by the rear support portion, wherein the front support portion elastically supports the front lubricating member, and the rear support portion elastically supports the rear lubricating member, wherein a movable range of the front support portion is greater than a movable range of the rear support portion.

[0011] Other specific details of the present invention are included in the detailed description and drawings.

[0012] According to embodiments of the present invention, at least the following effects are achieved.

[0013] Lubricating members are arranged in the front and rear areas of the razor blades to enable the razor cartridge to move smoothly over the skin during shaving, while simultaneously supplying lubricating ingredients to the shaving area.

[0014] In addition, the front support portion supporting the front lubricating member arranged in the front area of ​​the razor blade and the rear support portion supporting the rear lubricating member are formed to have different ranges of motion or different strain rates, thereby reducing the amount of change in the skin contact plane between the resting state and the shaving state, thereby reducing the force required for shaving and minimizing skin cuts, etc.

[0015] The effects according to the present invention are not limited to those exemplified above, and more diverse effects are included in this specification.

[0016] FIG. 1 is a perspective view showing the upper surface of a razor cartridge according to one embodiment of the present invention.

[0017] FIG. 2 is a perspective view showing the lower surface of a razor cartridge according to one embodiment of the present invention.

[0018] Figure 3 is an exploded perspective view of a razor cartridge according to one embodiment of the present invention.

[0019] FIG. 4 is a perspective view illustrating a razor blade housing of a razor cartridge according to one embodiment of the present invention.

[0020] FIG. 5 is a perspective view illustrating a housing cover of a razor cartridge according to one embodiment of the present invention.

[0021] FIG. 6 is a plan view illustrating a housing cover of a razor cartridge according to one embodiment of the present invention.

[0022] Figure 7 is a cross-sectional view taken along line BB of Figure 6.

[0023] Fig. 8 is a cross-sectional view taken along line CC of Fig. 6.

[0024] Figure 9 is a drawing for explaining the joint structure of the razor blade housing and the housing cover.

[0025] FIG. 10 is an exploded perspective view illustrating a housing cover according to another embodiment.

[0026] Fig. 11 is a cross-sectional view of a razor cartridge along line AA of Fig. 1.

[0027] FIG. 12 is a side view of a razor cartridge according to one embodiment of the present invention.

[0028] FIG. 13 is a partial cross-sectional view showing a resting state of a razor cartridge according to one embodiment of the present invention.

[0029] Fig. 14 is a side view showing a shaving state of a razor cartridge according to one embodiment of the present invention.

[0030] Fig. 15 is a side view comparing the resting state and the shaving state of a razor cartridge according to one embodiment of the present invention.

[0031] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. These embodiments are provided solely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined solely by the scope of the claims.

[0032] Furthermore, the embodiments described herein will be described with reference to cross-sectional and / or schematic drawings, which are ideal illustrations of the present invention. Therefore, the form of the illustrations may be modified due to manufacturing techniques and / or tolerances. Furthermore, in each drawing illustrated in the present invention, each component may be depicted somewhat enlarged or reduced for convenience of explanation. Throughout the specification, the same reference numerals denote the same components.

[0033] Hereinafter, the present invention will be described with reference to drawings for explaining a razor cartridge according to one embodiment of the present invention.

[0034] A razor cartridge (1) according to one embodiment of the present invention may be detachably coupled to a razor handle (not shown) or may be rotatably coupled to the razor handle within a certain angular range. Alternatively, the razor cartridge (1) according to one embodiment of the present invention may be fixedly coupled to the razor handle or may be formed integrally with the razor handle.

[0035] FIG. 1 is a perspective view showing the upper surface of a razor cartridge according to one embodiment of the present invention, and FIG. 2 is a perspective view showing the lower surface of a razor cartridge according to one embodiment of the present invention.

[0036] Referring to FIGS. 1 and 2, a razor cartridge (1) according to one embodiment of the present invention includes at least one razor blade (10), a frame (20), a front support (30), a front lubricating member (40), a rear support (50), and a rear lubricating member (60).

[0037] The razor blade (10) has a cutting edge (11) formed at the end, and is positioned so that the cutting edge (11) is exposed through the upper part of the frame (20).

[0038] The razor blade (10) may include a bent blade (see FIG. 3) in which an edge portion having a cutting edge (11) formed is bent, a flat blade in which a cutting edge (11) is formed on an end portion of a flat member that is not bent, and / or a steel blade formed by attaching a member having a cutting edge (11) formed on the upper or lower surface of a bent support member.

[0039] The razor blade (10) is generally made of stainless steel, but may also be made of materials such as ceramic or plastic.

[0040] The razor blade (10) may be formed of at least one of various materials / structures having a shape and strength capable of cutting body hair. The razor cartridge (1) may include one or more razor blades (10), and the number of razor blades (10) may vary depending on the embodiment.

[0041] The frame (20) accommodates the razor blade (10) longitudinally. In other words, the razor blade (10) is accommodated in the frame (20) such that the cutting edge (11) is parallel to the longitudinal direction (Y direction). When a plurality of razor blades (10) are accommodated in the frame (20), each razor blade (10) can be accommodated in a row in the transverse direction (X direction).

[0042] At least a portion of the upper portion of the frame (20) may be formed to be open upward (in the Z direction) so that at least a portion of the cutting edge (11) can be exposed through the upper portion of the frame (20).

[0043] The frame (20) may include a guard portion (21) positioned in front of the cutting edge (11). At least a portion of the guard portion (21) may form a front area of ​​the upper surface of the frame (20).

[0044] The guard part (21) is in close contact with the skin during the shaving process and pulls the skin in the shaving direction (positive X direction) so that the cutting edge (11) of the razor blade (10) cuts the hair on the skin that is pulled tightly. The guard part (21) may be formed of a material that has good adhesion to the skin. For example, the guard part (21) may be formed of a material such as rubber, silicone, or an elastic polymer. In addition, the guard part (21) may have a predetermined pattern engraved or embossed on the upper surface to improve adhesion to the skin. In addition, the guard part (21) may include a comb structure for aligning the hair.

[0045] The frame (20) may include a cap portion (22) positioned at the rear of the cutting edge (11). At least a portion of the cap portion (22) may form a rear area of ​​the upper surface of the frame (20).

[0046] The cap portion (22) comes into close contact with the skin during the shaving process. The cutting edge (11) of the razor blade (10) positioned between the guard portion (21) and the cap portion (22) slides along the skin surface flattened by the guard portion (21) and the cap portion (22) to cut the hair. The guard portion (21) and the cap portion (22) can define a shaving plane (S0, see FIG. 13), which is a plane on which shaving takes place. For example, the shaving plane (S0) can be defined as a plane that simultaneously contacts the upper surfaces of the guard portion (21) and the cap portion (22).

[0047] The cap portion (22) may include a lubricating band (22a, see FIG. 3). The lubricating band (22a) forms the upper surface of the cap portion (22) and can apply a shaving aid material to the skin surface where shaving is performed by coming into close contact with the skin during the shaving process. The lubricating band (22a) may include, as a shaving aid material, a lubricating material that allows the razor cartridge (1) to smoothly move while in close contact with the skin surface, a skin soothing material that soothes the skin, a skin moisturizing material, a skin regeneration material, etc.

[0048] Referring to FIG. 2, a connector (213) that is coupled to a razor handle (not shown) may be formed on the rear of the frame (20). The connector (213) may be detachably coupled to the razor handle. In addition, the connector (213) may be rotatably coupled to the razor handle within a certain angular range.

[0049] Referring to FIGS. 1 to 3, the front support member (30) extends forward (in the positive X direction) from the frame (20) and carries the front lubrication member (40). The rear support member (50) extends backward (in the negative X direction) from the frame (20) and carries the rear lubrication member (60).

[0050] The front lubricating member (40) and the rear lubricating member (60) can apply shaving aid materials to the skin surface where shaving is performed by coming into close contact with the skin during the shaving process. The front lubricating member (40) and the rear lubricating member (60) can include shaving aid materials such as lubricating materials, skin soothing materials, skin moisturizing materials, and skin regeneration materials.

[0051] The rear support (50) elastically supports the rear lubrication member (60), and the front support (30) elastically supports the front lubrication member (40). However, the range of motion of the front lubrication member (40) by the front support (30) may be greater than or equal to the range of motion of the rear lubrication member (60) by the rear support (50). This may mean that the relative range of motion of the front lubrication member (40) with respect to the frame (20) is supported to be greater than or equal to the relative range of motion of the rear lubrication member (60) with respect to the frame (20). The range of motion may mean the range of motion in the vertical direction (Z direction) of the highest point of each lubrication member (40, 60) with respect to the frame (20), the rotational range of each lubrication member (40, 60) with respect to the frame (20), etc.

[0052] Alternatively, the front support (30) and the rear support (50) may be formed to have different strains. The rear support (50) may be formed to have a smaller strain than the front support (30). Here, the strain may refer to the angular displacement of each lubricating member (40, 60) relative to the moment generated when a force is applied in the vertical direction to the highest point of each lubricating member (40, 60). The angular displacement of each lubricating member (40, 60) refers to the rotation angle of a straight line connecting a point of the extension (34, 56) described below of each support (30, 50) and the highest point of the lubricating member (40, 60). Therefore, the strain may be inversely proportional to the size of the rotational resistance for the same moment of each lubricating member (40, 60) (or, each support (30, 50)). According to the above definition, the greater the strain, the easier it is to rotate, and the smaller the strain, the more difficult it is to rotate. The strain may vary depending on the material, thickness, shape, etc. of each support member (30, 50).

[0053] Meanwhile, when the same force (e.g., a force acting in the up-down direction (Z direction) or a force acting during shaving) is applied to the front free ends of the front lubrication member (40) and the front support member (30) and the rear free ends of the rear lubrication member (60) and the rear support member (50), respectively, the up-down displacement rate of the front free ends of the front lubrication member (40) and the front support member (30) may be greater than the up-down displacement rate of the rear free ends of the rear lubrication member (60) and the rear support member (50).

[0054] The front lubricating member (40) and the rear lubricating member (60) can be formed so that their maximum longitudinal lengths are longer than the longitudinal length of the cutting edge (11) exposed through the frame (20). Accordingly, the front lubricating member (40) and the rear lubricating member (60) can apply a shaving aid material to the entire skin surface on which shaving is performed.

[0055] In order to enable smooth movement along the shaving direction of the razor cartridge (1), the front lubricating member (40) may be formed so that its longitudinal length becomes wider as it goes toward the rear, and the rear lubricating member (60) may be formed so that its longitudinal length becomes narrower as it goes toward the rear.

[0056] Hereinafter, each component of a razor cartridge (1) according to one embodiment of the present invention will be described in more detail.

[0057] Figure 3 is an exploded perspective view of a razor cartridge according to one embodiment of the present invention.

[0058] Referring to FIG. 3, a razor cartridge (1) according to one embodiment of the present invention may include a razor blade (10), a razor blade housing (210), a corrosion-preventing member (70), a housing cover (220), a front lubricating member (40), a lubricating band (22a), and a rear lubricating member (60).

[0059] The frame (20) described with reference to FIGS. 1 and 2 may include a razor blade housing (210) and a housing cover (220).

[0060] A razor blade (10) is accommodated in a razor blade housing (210), and a corrosion-preventing member (70) is arranged to be in contact with both longitudinal sides of the razor blade (10). The metallic corrosion-preventing member (70) can prevent the razor blade (10) made of a metal material from being corroded. In addition, the corrosion-preventing member (70) can be fixed in a form that wraps around both longitudinal sides of the razor blade (10), and in this case, the razor blade (10) can be prevented from being separated from the razor blade housing (210).

[0061] A razor housing (210) equipped with a razor blade (10) and a corrosion-preventing member (70) is coupled to a housing cover (220). The razor housing (210) is inserted from the lower portion toward the upper portion of the housing cover (220) and can be coupled to the housing cover (220).

[0062] FIG. 4 is a perspective view illustrating a razor blade housing of a razor cartridge according to one embodiment of the present invention.

[0063] Referring to FIG. 4, the razor blade housing (210) includes a razor blade support (211) for supporting a razor blade (10). The razor blade support (211) accommodates a razor blade (10) inserted from top to bottom toward the razor blade housing (210) and can support the razor blade (10) so that the cutting edge (11) is exposed upward. A plurality of razor blade support portions (211) may be spaced apart in the longitudinal direction (Y direction) to support one razor blade (10) at a plurality of points. In addition, the plurality of razor blade support portions (211) may be spaced apart in the transverse direction (X direction) to support a plurality of razor blades (10), respectively.

[0064] Referring to FIG. 4, the razor blade housing (210) may include a rinsing hole (212) formed to penetrate in the vertical direction (Z direction). The rinsing hole (212) may be used as a passage through which washing water passes during the process of washing the razor blade (10). The rinsing hole (212) may be formed between a plurality of razor blade supports (211).

[0065] Referring to FIG. 4, the razor blade housing (210) may include a connector (213). The connector (213) may form at least a portion of the lower surface of the razor blade housing (210). The connector (213) may have a structure that can be detachably coupled to a razor handle. In addition, the connector (213) may have a structure that can rotatably couple the razor blade housing (210) within a certain angular range with respect to the razor handle. The connector (213) may be manufactured integrally with the razor blade housing (210). Alternatively, the connector (213) may be manufactured as a separate configuration from the blade housing (210) and may be coupled to the blade housing (120) or the housing cover (220). In this case, the connector (213) may be coupled in a structure in which the position is fixed with respect to the blade housing (120) or the housing cover (220), or may be coupled in a structure in which the position is rotatable with respect to the blade housing (120) or the housing cover (220).

[0066] Referring to FIG. 4, the razor housing (210) may include a first connecting portion (214) coupled with a housing cover (220). The first connecting portion (214) may have a structure that is coupled with a second connecting portion (225, see FIG. 9) formed on the housing cover (220). For example, the first connecting portion (214) and the second connecting portion (225) may have a structure that allows for a male-female coupling, a hook coupling, a press-fit method, etc.

[0067] FIG. 5 is a perspective view illustrating a housing cover of a razor cartridge according to one embodiment of the present invention, and FIG. 6 is a plan view illustrating a housing cover of a razor cartridge according to one embodiment of the present invention.

[0068] Referring to FIGS. 5 and 6, a razor blade window (221) extending vertically is formed in the center of the housing cover (220). The razor blade window (221) is a space where the cutting edge (11) of the razor blade (10) is exposed upward.

[0069] The housing cover (220) may include a blade cover (222) formed transversely across both sides of the blade window (221). The blade cover (222) is positioned on the upper sides of the blade (10) to prevent the blade (10) from coming off. The blade cover (222) is positioned on the upper side of the corrosion-preventing member (70), to prevent the corrosion-preventing member (70) from coming off, and to maintain contact between the corrosion-preventing member (70) and the blade (10). The blade cover (222) includes a cover wall (222a) extending downward from a longitudinal outer end. The cover wall (222a) is formed to cover a portion of the longitudinal end of the blade (10), thereby preventing the cutting edge of the blade (10) from being exposed through a through hole (224) described later, thereby preventing a cut through the through hole (224) (see FIG. 12). The cover wall (222a) may be formed to be in contact with the longitudinal end of the razor blade (10).

[0070] Referring to FIG. 5, the housing cover (220) may include side wall portions (223a) forming both side surfaces. The side wall portions (223a) may be formed to surround at least a portion of the outer surface of the blade housing (210). In addition, the side wall portions (223a) may be formed to extend to a position lower than the lower end of the blade cover (222) or the upper end of the side wall portions (215) of the blade housing (210) in the vertical direction, or may be formed to extend to a position lower than the blade housing (210) or the cutting edge (11), and may be arranged to be spaced apart from the blade housing (210) in the longitudinal direction.

[0071] Referring to FIG. 5, a through hole (224) may be formed between the side wall portion (223a) and the blade cover (222). The through hole (224) may be open in an outward direction and may be open in a longitudinal direction and / or an up-down direction.

[0072] More specifically, referring to FIG. 5, the longitudinal opening of the through hole (224) can be defined as a space between the upper end of the side wall portion (223a) facing the razor blade cover (222) and the lower end of the cover wall (222a), and the vertical opening of the through hole (224) can be defined as a space between the inner side of the side wall portion (223a) facing the cover wall (222a) and the outer side of the cover wall (222a). Alternatively, the longitudinal opening of the through hole (224) may be defined as a space between the upper end of the side wall portion (215, see FIG. 4, FIG. 12) of the blade housing (210) and the lower end of the blade cover (222) or the lower end of the cover wall (222a), and the vertical opening of the through hole (224) may be defined as a space between the inner side of the side wall portion (223a) facing the cover wall (222a) and the outer side of the side wall portion (215) of the blade housing (210).

[0073] The longitudinal opening and the vertical opening of the through hole (224) are formed in a structure that allows fluid communication, and thus can be opened in the longitudinal and / or vertical directions. The through hole (224) enables shaving residue existing between the razor blades (10) during the shaving process and / or the washing process to be discharged in the longitudinal and / or vertical directions, thereby improving the discharge efficiency of the shaving residue and the convenience of washing the razor cartridge (1).

[0074] Referring to FIGS. 5 and 6, the housing cover (220) may include a guard portion (21) formed in front of the razor blade window (221). The guard portion (21) may be formed of a soft material such as silicone, rubber, or an elastic polymer to improve adhesion to the skin.

[0075] Since the razor cartridge (1) according to the present embodiment is provided with a front lubricating member (40) and a rear lubricating member (60) at the front and rear, respectively, a portion where the user can easily grip the razor cartridge (1) may be a lateral region of the frame (20). Accordingly, at least a portion of the lateral region of the frame (20) may be formed of a soft material such as silicone, rubber, or an elastic polymer to improve gripping force. For example, at least a portion of the surface of the side wall portion (223a) forming the periphery of the through hole (224) as the outer side of the razor blade cover (222) may be formed of a soft material.

[0076] However, the razor blade cover (222) is positioned above the cutting edge of the razor blade (10) in the vertical direction (Z direction) and comes into close contact with the skin during the shaving process. Therefore, if a soft material is included on the upper surface of the razor blade cover (222), the force required for shaving increases due to excessive friction with the skin, so it is preferable that the surface of the razor blade cover (222) is not formed of a soft material.

[0077] Referring to FIGS. 5 and 6, the housing cover (220) may include a cap portion (22) formed at the rear (negative X direction) of the blade window (221). An upwardly open lubrication band receiving groove (226) may be formed in the cap portion (22). A lubrication band (22a) of the cap portion (22) may be inserted and installed into the lubrication band receiving groove (226). According to an embodiment, the cap portion (22) may be formed in the blade housing (210), and in this case, the lubrication band receiving groove (226) may also be formed in the blade housing (210).

[0078] Meanwhile, referring to FIGS. 5 and 6, the housing cover (220) may include a rear guard portion (228) formed at the rear of the razor blade window (221). Since the razor cartridge (1) according to the present embodiment is provided with a front lubricating member (40) and a rear lubricating member (60) at the front and rear, respectively, the razor cartridge (1) may excessively slip on the skin surface due to the front lubricating member (40) and the rear lubricating member (60). Therefore, to prevent this, a rear guard portion (228) that comes into contact with the user's skin is provided, and the rear guard portion (228) may be formed of a soft material such as silicone, rubber, or an elastic polymer to improve adhesion to the skin. Although not shown, a predetermined pattern may be formed in a concave or convex shape on the upper surface of the rear guard portion (228) to improve adhesion to the skin. The rear guard portion (228) may be located at the rear of the lubricating band (22a).

[0079] The guard portion (21), a portion of the side wall portion (223a) (e.g., a portion surrounding the through hole (224)), and / or the upper surface of the rear guard portion (228) may be integrally formed of the same flexible material. The guard portion (21), the side wall portion (223a), and the rear guard portion (228) may be formed to be connected to each other and surround the blade window (221). The flexible materials of the guard portion (21), the side wall portion (223a), and the rear guard portion (228) may be integrally formed on the rigid material of the housing cover (220) by a method such as double injection molding.

[0080] Referring to FIGS. 5 and 6, the front support (30) can be formed to extend forward from the housing cover (220).

[0081] The front support portion (30) may include a front extension portion (34) extending forward from the housing cover (220), a plurality of front support ribs (31) extending forward from the front extension portion (34), and a plurality of front holes (32) penetrating upward and downward through the front support portion (30).

[0082] The front lubrication member (40) can be supported by the front support member (30) by being injected so as to cover the upper and lower surfaces of the plurality of front support ribs (31) and penetrate the plurality of front holes (32). By means of the support structure using the plurality of front support ribs (31) and the plurality of front holes (32), the front lubrication member (40) is firmly supported by the front support member (30), and the front lubrication member (40) is prevented from being separated from the front support member (30).

[0083] The front extension (34) is intended to provide rotation of the front lubrication member (40) with respect to the frame (20) and / or the housing cover (220), and for this purpose, the front lubrication member (40) may not be formed in at least a portion of the front extension (34).

[0084] In order for the front lubrication member (40) to be firmly maintained on the front support member (30), a plurality of front support ribs (31) may extend in the longitudinal and transverse directions, and the area of ​​the plurality of front holes (32) may be wider than the area of ​​the plurality of front support ribs (31). In addition, in order to prevent the front lubrication member (40) from being detached from the front support member (30), the front support member (30) may further include a detachment prevention protrusion (33) that is formed to protrude or extend from at least a portion of the front support rib (31). The detachment prevention protrusion (33) may be formed to protrude upward and / or downward from the front support rib (31).

[0085] A plurality of front support ribs (31) can be formed to be substantially elastically rotatable relative to the housing cover (220).

[0086] The front support member (30) and the front lubrication member (40) may have various structures to be supported so as to be rotatably elastic about an axis parallel to the longitudinal direction (Y direction) with respect to the housing cover (220).

[0087] For example, at least a portion of the front support portion (30), i.e., the front extension portion (34), may be formed integrally with the housing cover (220) or the frame (20) using an inelastic material (e.g., ABS, PP, etc.), but the front extension portion (34) may be formed to have a thinner thickness than other portions so that the front support rib (31) can be elastically rotated relative to the housing cover (220), or an elastic hinge may be provided for pivoting the front support rib (31) relative to the housing cover (220).

[0088] Alternatively, at least a portion of the front support portion (30) may be formed of a different material from the housing cover (220), and may be formed of a material having a relatively lower elastic modulus than the housing cover (220). In this case, at least a portion of the front support portion (30) may be manufactured by double injection molding into the housing cover (220).

[0089] Alternatively, the front support (30) may be manufactured separately from the housing cover (220) and installed to be rotatably elastically installed on the housing cover (220).

[0090] As long as the front support portion (30) is formed rotatably with respect to the housing cover (220), the material of the plurality of front support ribs (31) is not limited. For example, even if the front extension portion (34) of the front support portion (30) is formed of a flexible material such as an elastic hinge, the plurality of front support ribs (31) may be formed of a material having the same rigidity as the housing cover (220), and it is also possible for the front support ribs (31) to be formed of the same material as the front extension portion (34) so ​​that the front support portion is formed of a single material. The rear support ribs (51) described below are also the same.

[0091] Fig. 7 is a cross-sectional view taken along line BB of Fig. 6, and Fig. 8 is a cross-sectional view taken along line CC of Fig. 6.

[0092] Referring to FIGS. 6 to 8, the plurality of front support ribs (31) include a first front support rib (31a), a second front support rib (31b), and a third front support rib (31c).

[0093] The first front support rib (31a) and the second front support rib (31b) may extend forward from the housing cover (220). The third front support rib (31c) may be formed to substantially longitudinally connect the free ends of the first front support rib (31a) and the second front support rib (31b). The anti-separation protrusion (33) may be formed to protrude from the third front support rib (31c).

[0094] The first front support rib (31a) may be located on the outer side of the second front support rib (31b). Although FIG. 6 illustrates an example in which two second front support ribs (31b) are formed between two first front support ribs (31a), one second front support rib (31b) or two or more second front support ribs (31b) may be formed depending on the embodiment. Alternatively, depending on the embodiment, the first front support rib (31a) may be omitted, in which case the third front support rib (31c) may extend from the front end of the second front support rib (31b) in a direction different from the extension direction of the second front support rib (31b), for example, in a longitudinal direction or a direction perpendicular to the extension direction of the second front support rib (31b).

[0095] Referring to FIGS. 7 and 8, the first front support rib (31a) and the second front support rib (31b) extend forward from the housing cover (220) but extend forward while forming a downward slope (or with respect to the shaving plane (S0, see FIG. 13)).

[0096] However, the first front support rib (31a) and the second front support rib (31b) may extend forwardly while forming different angles downward. Referring to FIGS. 7 and 8, the first front support rib (31a) may extend forwardly while forming a downward slope at a greater angle than the second front support rib (31b).

[0097] Since the first front support rib (31a) and the second front support rib (31b) extend forward while forming downward inclinations at different angles, the front lubrication member (40) is supported more three-dimensionally, thereby preventing the front lubrication member (40) from coming off.

[0098] In addition, referring to FIG. 6, the third front support rib (31c) extends in the longitudinal direction, has a concave shape in the central portion, and includes a separation prevention bump (33), thereby effectively preventing the front lubrication member (40) from being separated forward.

[0099] Referring to FIGS. 5 and 6, the rear support (50) can be formed to extend rearward (in the negative X direction) from the housing cover (220).

[0100] The rear support member (50) may include a rear extension member (56) extending rearward from the housing cover (220), a plurality of rear support ribs (51) extending rearward from the rear extension member (56), and a plurality of rear holes (52) penetrating the rear support member (50) upwardly and downwardly. The rear lubrication member (60) may be injected to cover the upper and lower surfaces of the plurality of rear support ribs (51) and penetrate the plurality of rear holes (52) so as to be supported by the rear support member (50). By the support structure using the plurality of rear support ribs (51) and the plurality of rear holes (52), the rear lubrication member (60) is firmly supported on the rear support member (50), and the rear lubrication member (60) is prevented from being separated from the rear support member (50).

[0101] The rear extension (56) is intended to provide rotation of the rear lubrication member (60) with respect to the frame (20) and / or the housing cover (220), and for this purpose, the rear lubrication member (60) may not be formed in at least a portion of the rear extension (56).

[0102] In order for the rear lubricating member (60) to be firmly maintained on the rear support member (50), a plurality of rear support ribs (51) may extend in the longitudinal and transverse directions, and the area of ​​the plurality of rear holes (52) may be wider than the area of ​​the plurality of rear support ribs (51).

[0103] Referring to FIGS. 5 to 8, in order to prevent the rear lubrication member (60) from being detached from the rear support member (50), the rear support member (50) may further include, similar to the front support member (30), a detachment prevention protrusion (54) formed to protrude from at least a portion of the rear support rib (51). The detachment prevention protrusion (54) may be formed on the free end side of the rear support rib (51) and may be formed to protrude upward and / or downward from the rear support rib (51).

[0104] In addition, the rear support member (50) may include a waterproof step (55) formed in front of a plurality of rear holes (52). The waterproof step (55) prevents water flowing into the gap created between the rear lubrication member (60) and the rear support member (50) from entering the rear holes (52), thereby preventing the rear lubrication member (60) inside the rear holes (52) from being eroded by the water flowing into the rear holes (52). In addition, the waterproof step (55) together with the separation prevention step (54) prevents the rear lubrication member (60) from being separated from the rear support member (50).

[0105] The rear support member (50) and the rear lubrication member (60) may have various structures to be elastically and rotatably supported about an axis parallel to the longitudinal direction (Y direction) with respect to the housing cover (220).

[0106] For example, at least a portion of the rear support member (50), i.e., the rear extension member (56), may be formed integrally with the housing cover (220) or the frame (20) using an inelastic material (e.g., ABS, PP, etc.), but the rear extension member (56) may be formed to have a thinner thickness than other portions so that the rear support rib (51) can elastically rotate relative to the housing cover (220), or, as illustrated in FIG. 6, the rear support rib (51) may include an elastic hinge (53) to elastically support the rear lubrication member (60) relative to the housing cover (220).

[0107] Alternatively, at least a portion of the rear support portion (50), i.e., the rear extension portion (56), may be formed of a different material from the housing cover (220), and at least a portion of the rear support portion (50) may be formed of a material having a relatively lower elastic modulus than the housing cover (220). In this case, at least a portion of the rear support portion (50) may be manufactured by double injection molding into the housing cover (220).

[0108] Alternatively, the rear support (50) may be manufactured separately from the housing cover (220) and installed to be rotatably elastically installed on the housing cover (220).

[0109] Meanwhile, since the front lubrication member (40) is located in front of the razor blade (10), the load applied to the front lubrication member (40) during the shaving process is greater than the load applied to the rear lubrication member (60). Therefore, the front lubrication member (40) is more likely to come off than the rear lubrication member (60). In order to prevent the front lubrication member (40) from coming off, the area of ​​the plurality of front holes (32) may be wider than the area of ​​the plurality of rear holes (52). Alternatively, the ratio of the area of ​​the plurality of front holes (32) to the horizontal cross-sectional area of ​​the front lubrication member (40) may be greater than the ratio of the area of ​​the plurality of rear holes (52) to the horizontal cross-sectional area of ​​the rear lubrication member (60). Alternatively, the ratio of the area of ​​the plurality of front holes (32) to the area of ​​the plurality of front support ribs (31) may be greater than the ratio of the area of ​​the plurality of rear holes (52) to the area of ​​the plurality of rear support ribs (51).

[0110] The front lubricating member (40) and the rear lubricating member (60) may wear out at different rates due to pressure applied by the skin, friction with body hair, etc. during the shaving process. For example, since the front lubricating member (40) is located in front of the razor blade (10) compared to the rear lubricating member (60), the front lubricating member (40) is subjected to higher pressure than the rear lubricating member (60) during the shaving process, and may wear out relatively quickly.

[0111] Accordingly, the extension starting point of the front support (30) from the housing cover (220) may be positioned lower from the blade cover (222) or the shaving plane (S0) than the extension starting point of the rear support (50) so that more front lubricating members (40) are supported in the upper area of ​​the front support (30). In addition, as illustrated in FIG. 7, the first front support rib (31a) may extend with a greater downward slope (or with respect to the shaving plane (S0, see FIG. 13)) compared to the rear support rib (51).

[0112] Alternatively, the front lubrication member (40) and the rear lubrication member (60) may be composed of lubricating materials having different components or different component ratios, so that the wear cycles of the front lubrication member (40) and the rear lubrication member (60) may be similar.

[0113] For example, the front lubricating member (40) may be composed of a lubricating material having a component or component ratio that has a slower wear rate than the rear lubricating member (60). To this end, the front lubricating member (40) may be composed of a lower moisture content than the rear lubricating member (60). Alternatively, the front lubricating member (40) may be composed of a higher viscosity than the rear lubricating member (60).

[0114] Figure 9 is a drawing for explaining the joint structure of the razor blade housing and the housing cover.

[0115] Referring to FIG. 9, the housing cover (220) may include a side wall portion (223a), a front wall portion (223b), and a rear wall portion (223c) that form a space for accommodating the razor blade housing (210).

[0116] A protrusion (223d) that protrudes inwardly may be formed at the corner between the side wall portion (223a) and the front wall portion (223b), and at the corner between the side wall portion (223a) and the rear wall portion (223c). The protrusion (223d) may allow the side wall portion (223) of the housing cover (220) and the side wall portion (215) of the blade housing (210) to be spaced apart from each other, thereby ensuring a vertical opening of the through hole (224, see FIG. 5). In addition, since the side wall portion (223) of the housing cover (220) and the side wall portion (215) of the blade housing (210) are spaced apart from each other, the blade housing (210) can easily enter the housing cover (220) during the assembly process of the blade housing (210) and the housing cover (220), thereby improving the convenience of assembly. In addition, the razor blade housing (210) that has entered the housing cover (220) is guided to the correct installation position by the protrusion (223d), and can be supported laterally by the protrusion (223d) to be firmly fixed within the housing cover (220).

[0117] Referring to FIG. 9, the housing cover (220) may include a plurality of second connecting portions (225) formed on the lower surface. The plurality of second connecting portions (225) are coupled in a one-to-one correspondence with the first connecting portions (214) of the razor blade housing (210), thereby fixing the razor blade housing (210) to the housing cover (220). The first connecting portions (214) and the second connecting portions (225) may have a structure that allows for a male-female coupling, a hook coupling, a press-fit method, etc.

[0118] FIG. 9 illustrates an example in which the second connecting portion (225) is formed of protrusions protruding downward (in the negative Z direction) and the first connecting portion (214) is formed of grooves that accommodate the second connecting portion (225). However, depending on the embodiment, the first connecting portion (214) may be formed of protrusions and the second connecting portion (225) may be formed of grooves, or the first connecting portion (214) may be formed of grooves and protrusions and the second connecting portion (225) may be formed of grooves and protrusions corresponding to the first connecting portion (214).

[0119] Meanwhile, referring to FIG. 2, when the razor housing (210) and the housing cover (220) are coupled, the side wall portion (223a), the front wall portion (223b), and the rear wall portion (223c) of the housing cover (220) may be formed to protrude downward (in the negative Z direction) from the lower surface of the razor housing (210). Since the side wall portion (223a), the front wall portion (223b), and the rear wall portion (223c) form a step with the lower surface of the razor housing (210) and are formed to surround the razor housing (210), when cleaning water is introduced through the lower surface of the razor cartridge (1), the cleaning water can be concentrated and introduced toward the razor blade (10) while being gathered in the space surrounded by the side wall portion (223a), the front wall portion (223b), and the rear wall portion (223c). Therefore, a larger amount of cleaning water is introduced to the razor blade (10), thereby improving the cleaning effect.

[0120] FIG. 10 is an exploded perspective view illustrating a housing cover according to another embodiment.

[0121] Referring to FIG. 10, the housing cover (220) may include a first housing cover (220a) and a second housing cover (220b).

[0122] The first housing cover (220a) may include the aforementioned cap portion (22), blade window (221), blade cover (222), side wall portion (223), through hole (224), lubrication band receiving groove (226), etc. The first housing cover (220a) may be coupled with the blade housing (210) and may include a second connecting portion (225) for this purpose.

[0123] Additionally, the front support (30) can be formed integrally with the first housing cover (220a).

[0124] The first housing cover (220a) may be formed of a material having a relatively higher elastic modulus than the second housing cover (220b). However, at least a portion of the front support portion (30), i.e., the front extension portion (34), may be formed of a material different from the first housing cover (220a), may be formed of a material having a lower elastic modulus than the second housing cover (220a), or may be formed of a material having a lower elastic modulus than the rear support portion (50). The front support portion (30) may be formed integrally with the first housing cover (220a) by a method such as double injection molding.

[0125] The second housing cover (220b) may include the aforementioned blade window (221), the guard portion (21), a portion of the side wall portion (223a) (e.g., a portion surrounding the through hole (224)), the rear guard portion (228), etc. The blade window (221) of the second housing cover (220b) may be formed larger than the blade window (221) of the first housing cover (220a) so that the cap portion (22) and the lubrication band (22a) can be accommodated.

[0126] Additionally, the rear support (50) can be formed integrally with the second housing cover (220b).

[0127] The rear support (50) may be formed of a material having a relatively lower elastic modulus than the first housing cover (220a).

[0128] The first housing cover (220a) and the second housing cover (220b) may be manufactured separately and then combined. Alternatively, the second housing cover (220b) may be manufactured as an integral part by double injection molding on the first housing cover (220a).

[0129] FIG. 11 is a cross-sectional view of a razor cartridge according to one embodiment of the present invention.

[0130] Referring to FIG. 11, when the razor blade housing (210) and the housing cover (220) are coupled, the corrosion prevention member (70) can be positioned between the razor blade (10) and the razor blade cover (222). Since the razor blade (10) and the corrosion prevention member (70) are prevented from coming off by the razor blade cover (222), the corrosion prevention member (70) can have only the minimum structure that can maintain contact with the razor blade (10) to prevent corrosion of the razor blade (10). In the past, in order to have a structure for preventing the razor blade from coming off, the corrosion prevention member was formed by bending so as to extend from the upper part of the razor blade to the lower part and wrap around a portion of the lower surface of the razor blade housing (see Korean Patent Registration No. 2015770). Therefore, in the past, the corrosion prevention member (70) had to be bent in at least four areas. However, according to the present embodiment, since the razor blade (10) can be fixed by the combination of the blade housing (210) and the housing cover (220), a structure for preventing the razor blade (10) from coming off is not required for the corrosion-preventing member (70). Therefore, the corrosion-preventing member (70) does not need to be bent so as to extend to the lower portion of the razor blade (10). That is, the corrosion-preventing member (70) does not need to be bent so as to surround the lower end of the razor blade (10). Therefore, the corrosion-preventing member (70) has two or fewer bending regions and can be retained in the razor cartridge (1). This not only improves production efficiency by enabling a reduction in the bending process compared to a process for manufacturing a conventional corrosion-preventing member, but also reduces the overall length of the corrosion-preventing member (70).

[0131] Although Fig. 11 illustrates an example in which the corrosion-preventing member (70) has two bending regions, the corrosion-preventing member (70) is not limited thereto as long as it has a shape that can come into contact with all razor blades (10) mounted on the razor blade housing (210). For example, the corrosion-preventing member (70) can be fixed and maintained between the razor blade (10) and the housing cover (220) in a bar shape without a bending region.

[0132] Meanwhile, referring to FIG. 11, the front lubrication member (40) and the rear lubrication member (60) can be formed to be spaced apart from the frame (210, 220).

[0133] Since the razor cartridge (1) according to the present embodiment includes both a front lubricating member (40) and a rear lubricating member (60), a large amount of lubricating material and / or shaving residue may be generated due to a large amount of lubricating material applied to the skin during the shaving process, and a structure for smoothly discharging these may be required. To this end, a gap (G) forming a flow path extending in the longitudinal direction (Y direction) may be formed between the front lubricating member (40) and the frame (20), for example, between the front lubricating member (40) and the upper surface of the guard portion (21). The gap (G) may be a flow path through which shaving residue generated during the shaving process and / or washing process is discharged. As illustrated in FIG. 11, the gap (G) may be formed to have a transverse (X direction) width that gradually increases toward the upper side (positive Z direction) so that the shaving residue and / or lubricating material can easily flow into the gap (G). The shape of this gap (G) allows shaving residue that has entered between the front lubricating member (40) and the frame (20) to be discharged more effectively. To this end, the upper surface of the guard portion (21) may be formed to have an outwardly convex curved shape whose height gradually decreases as it moves forward.

[0134] Although not shown, in order to more effectively discharge shaving residue within the gap (G) and prevent hair or shaving residue from getting caught at the boundary between the front lubricating member (40) and the front support member (30), the front support member (30) positioned within the gap (G) may be formed with at least one discharge hole extending vertically. The discharge hole may also be formed so that a portion overlaps the front lubricating member (40).

[0135] The gap between the rear lubrication member (60) and the cap portion (22) of the frame (20) can also be formed similarly to the above, and the rear support member (50) located within the gap can also be formed with at least one discharge hole penetrating upward and downward, and the discharge hole can be formed so that a portion overlaps the rear lubrication member (60).

[0136] Meanwhile, referring to FIG. 2, a portion of the central area (41) of the lower surface of the front lubricating member (40) may be formed concavely. This is to prevent interference between the razor handle and the front lubricating member (40) when the razor cartridge (1) rotates relative to the razor handle.

[0137] FIG. 12 is a side view of a razor cartridge according to one embodiment of the present invention.

[0138] Referring to FIG. 12, the maximum thickness (H1, maximum length in the Z direction) of the front lubrication member (40) may be greater than the maximum thickness (H2, maximum length in the Z direction) of the rear lubrication member (60).

[0139] The maximum thickness (H1) of the front lubrication member (40) can be formed forward from the center of the front lubrication member (40) in the transverse direction.

[0140] The maximum thickness (H2) of the rear lubrication member (60) can be formed rearward from the center of the rear lubrication member (60).

[0141] The front lubricating member (40) located in front of the razor blade (10) may wear out faster than the rear lubricating member (60) located in the rear of the razor blade (10) because it receives a greater load during the shaving process than the rear lubricating member (60). By configuring the vertical thickness (H1) of the front lubricating member (40), which wears out relatively quickly, to be thicker than that of the rear lubricating member (60), the usable period of the razor cartridge (1) can be extended.

[0142] FIG. 13 is a partial cross-sectional view showing a resting state of a razor cartridge according to one embodiment of the present invention.

[0143] Referring to FIG. 13, the shaving plane (S0) and the skin contact plane (S1, hereinafter, first skin contact plane) in the resting state are not parallel to each other and may form a certain angle (θ).

[0144] The distance (T1) between the highest point of the front lubricating member (40) in the resting state and the shaving plane (S0) may be greater than the distance (T2) between the highest point of the rear lubricating member (60) in the resting state and the shaving plane (S0). In this case, the shaving plane (S0) and the skin contact plane (S1) in the resting state may intersect at the rear of the rear lubricating member (60).

[0145] According to an embodiment, the distance (T1) between the highest point of the front lubricating member (40) in the resting state and the shaving plane (S0) and the distance (T2) between the highest point of the rear lubricating member (60) in the resting state and the shaving plane (S0) may be formed to be substantially the same, in which case the shaving plane (S0) and the skin contact plane (S1) in the resting state may be parallel to each other, and the maximum thickness (H1) of the front lubricating member (40) and the maximum thickness (H2) of the rear lubricating member (60) may be formed to be substantially the same.

[0146] The shaving plane (S0) may refer to a plane on which shaving occurs by the razor blade (10) during the shaving process, and may be a plane in contact with the upper surfaces of the guard portion (21) and the cap portion (22). As illustrated in FIG. 5, the guard portion (21) and the cap portion (22) may be formed on the housing cover (220), but depending on the embodiment, the guard portion (21) and the cap portion (22) may be formed on the blade housing (210), and one or a part of the guard portion (21) and the cap portion (22) may be formed on the blade housing (210), and the other one or a part of the other may be formed on the housing cover (220).

[0147] The resting state is a state in which no separate external force is applied to the razor cartridge (1), and the first skin contact plane (S1) may be a plane that simultaneously contacts the upper surface of the front lubricating member (40) and the upper surface of the rear lubricating member (60) in the resting state.

[0148] Referring to Fig. 13, in the resting state, the front support member (30) and the rear support member (50) elastically support the front lubrication member (40) and the rear lubrication member (60), respectively, so that the upper surfaces of the front lubrication member (40) and the rear lubrication member (60) are positioned higher than the cutting edge (11) or the shaving plane (S0) in the vertical direction (Z direction).

[0149] During shaving, the front lubricating member (40) is pressed downward by the skin and rotates relative to the frame (20) to come into contact with the shaving plane (S0). Therefore, in order for the front lubricating member (40) to remain in contact with the skin during shaving, it is preferable that the upper surface of the front lubricating member (40) be positioned higher than the shaving plane (S0) in the resting state. The rear lubricating member (60) is also pressed downward by the skin and rotates relative to the frame (20) to come into contact with the shaving plane (S0) during shaving. Therefore, in order for the rear lubricating member (60) to remain in contact with the skin during shaving, it is preferable that the upper surface of the rear lubricating member (60) be positioned higher than the shaving plane (S0) in the resting state.

[0150] Referring to FIG. 13, the first skin contact plane (S1) may be positioned above all razor blades (10), and the frame (20) may be positioned below the first skin contact plane (S1).

[0151] FIG. 14 is a side view illustrating a shaving state of a razor cartridge according to one embodiment of the present invention, and FIG. 15 is a side view comparing a resting state and a shaving state of a razor cartridge according to one embodiment of the present invention.

[0152] The shaving state is a state in which body hair is cut by the razor blade (10), and may mean a state in which the cutting edge (11) is in close contact with the skin, a state in which the skin is in close contact with the upper surface of the frame (20), a state in which the front lubricating member (40) and / or the rear lubricating member (60) are deflected so that at least a portion of the upper surfaces of the front lubricating member (40) and the rear lubricating member (60) are in contact with the shaving plane (S0), or a state in which the skin is located on the shaving plane (S0). However, during actual shaving, depending on the user's skin condition or curve or the user's way of using the razor, the plane in which the upper surfaces of the front lubricating member (40) and the rear lubricating member (60) are in contact with the shaving plane (S0), and the degree of deflection of the front lubricating member (40) and the rear lubricating member (60) may not coincide with the shaving plane (S0), and the degree of deflection of the front lubricating member (40) and the rear lubricating member (60) may be adjusted.

[0153] As the razor cartridge (1) according to the present embodiment is pressed against the skin, the front lubricating member (40) and the rear lubricating member (60) are transformed from the resting state shown in FIG. 13 to the shaving state shown in FIG. 14.

[0154] Referring to FIG. 15, the rear support member (50) elastically supports the rear lubrication member (60) so that the upper surface of the rear lubrication member (60) in the shaving state is positioned lower than the upper surface of the rear lubrication member (60) in the resting state. Referring to FIG. 14, in the shaving state, at least a portion of the upper surface of the rear lubrication member (60) may be positioned adjacent to the shaving plane (S0), or at least a portion of the area may be positioned lower than the shaving plane (S0).

[0155] Also, referring to FIG. 15, the front support member (30) elastically supports the front lubrication member (40) so that the upper surface of the front lubrication member (40) in the shaving state is positioned lower than the upper surface of the front lubrication member (40) in the resting state. Referring to FIG. 14, in the shaving state, at least a portion of the upper surface of the front lubrication member (40) may be positioned adjacent to the shaving plane (S0), or at least a portion of the area may be positioned lower than the shaving plane (S0).

[0156] Referring to FIG. 15, the front support member (30) may be configured so that the rotation angle range (α) of the front lubrication member (40) is within 10 to 50 degrees, preferably within 15 to 40 degrees, and more preferably within 15 to 35 degrees, and the rear support member (50) may be configured so that the rotation angle range (β) of the rear lubrication member (60) is within 10 to 40 degrees, preferably within 10 to 35 degrees, and more preferably within 10 to 30 degrees. The rotation angle (α) of the front lubrication member (40) can be measured as the angle between a virtual line connecting a specific point of the front lubrication member (40) in the resting state (e.g., the front lower corner or highest point of the front lubrication member (40)) and some point of the front extension (34), and a virtual line connecting a specific point of the front lubrication member (40) in the shaving state (the same point as the specific point of the front lubrication member (40) in the resting state) and some point of the front extension (34). The rotation angle (β) of the rear lubrication member (60) can be measured as the angle between a virtual line connecting a specific point of the rear lubrication member (60) in the resting state (e.g., the rear lower corner or the highest point of the rear lubrication member (60)) and a certain point of the rear extension (56), and a virtual line connecting a specific point of the rear lubrication member (60) in the shaving state (the same point as the specific point of the rear lubrication member (60) in the resting state) and a certain point of the rear extension (56). In addition, referring to FIG. 15, the displacement of the front end of the upper surface of the front lubrication member (40) can be greater than the displacement of the rear end of the upper surface of the rear lubrication member (60).

[0157] In the razor cartridge (1) according to the present embodiment, since the displacement by which the front lubricating member (40) moves between the resting state and the shaving state is greater than the displacement by which the rear lubricating member (60) moves between the resting state and the shaving state, the thickness of the front lubricating member (40) is formed thicker than the thickness of the rear lubricating member (60), so that, as shown in FIG. 14, the first skin contact plane (S1) and the skin contact plane (S2, hereinafter referred to as the second skin contact plane) in the shaving state are not parallel to each other, and the intersection point of the first skin contact plane (S1) and the second skin contact plane (S2) can be positioned closer to the rear lubricating member (60) than to the front lubricating member (40), and can be positioned behind the rear lubricating member (60).

[0158] In an embodiment, when the vertical thickness of the front lubrication member (40) and the vertical thickness of the rear lubrication member (60) are formed to be substantially the same, or when the distance (T1) between the highest point of the front lubrication member (40) in the resting state and the shaving plane (S0) and the distance (T2) between the highest point of the rear lubrication member (60) in the resting state and the shaving plane (S0) are formed to be substantially the same, the first skin contact plane (S1) and the second skin contact plane (S2) can be parallel to each other.

[0159] The second skin contact plane (S2) may be a plane that simultaneously contacts the upper surface of the front lubricating member (40) and the upper surface of the rear lubricating member (60) in a shaving state. The second skin contact plane (S2) may be substantially the same as the shaving plane (S0).

[0160] A skin contact plane that simultaneously contacts the upper surface of the front lubrication member (40) and the upper surface of the rear lubrication member (60) varies between a first skin contact plane (S1) and a second skin contact plane (S2). As the state changes from a resting state to a shaving state, the skin contact plane rotates so that the angle with the shaving plane (S0) decreases about the intersection point of the first skin contact plane (S1) and the second skin contact plane (S2), and is transformed from the first skin contact plane (S1) to the second skin contact plane (S2). Conversely, as the state changes from a shaving state to a resting state, the skin contact plane rotates so that the angle with the shaving plane (S0) increases about the intersection point, and is transformed from the second skin contact plane (S2) to the first skin contact plane (S1).

[0161] Since both the front lubricating member (40) and the rear lubricating member (60) are elastically supported with respect to the frame (20), even if the pressure of the razor cartridge (1) against the skin changes due to the curvature of the skin, etc., the user can adjust the degree of pressure of the rear lubricating member (60) against the skin while maintaining contact between both the front lubricating member (40) and the rear lubricating member (60) with the skin, thereby controlling the shaving intensity or shaving feel.

[0162] In addition, since the front support part (30) is formed to have a greater strain than the rear support part (50), the front support part (30) easily rotates even with a small force, so that the front lubricating member (40) is brought into contact with the shaving plane (S0). Therefore, even if the front lubricating member (40) exists, the close contact between the razor blade located at the frontmost position among the razor blades (10) and the skin surface is not hindered. In addition, since the front support part (30) easily rotates even with a small force, the load applied to the front lubricating member (40) during the shaving process is reduced, so that the wear rate of the front lubricating member (40) can be reduced. In addition, since the front support part (30) easily rotates even with a small force, the vertical thickness of the front lubricating member (40) can be formed thicker, and the service life of the front lubricating member (40) can be extended.

[0163] When the distance (T1) between the highest point of the front lubricating member (40) in the resting state and the shaving plane (S0) and the distance (T2) between the highest point of the rear lubricating member (60) in the resting state and the shaving plane (S0) are formed to be substantially the same, or when the vertical thickness of the front lubricating member (40) and the vertical thickness of the rear lubricating member (60) are formed to be substantially the same, the movable ranges of the front lubricating member (40) and the rear lubricating member (60) when switching from the resting state to the shaving state can be substantially the same. Since the front support member (30) is formed to have a greater strain than the rear support member (50), less force is required for the front lubricating member (40) to switch from the resting state to the shaving state compared to the rear lubricating member (60), so that the front lubricating member (40) can easily and quickly switch from the resting state to the shaving state when shaving starts, and the razor blade (10) located at the frontmost end can easily come into close contact with the skin surface.

[0164] In addition, even if the front lubrication member (40) and / or the rear lubrication member (60) are partially worn, since the front lubrication member (40) and the rear lubrication member (60) are elastically supported, a skin contact plane adjacent to the shaving plane (S0) is created during the shaving process, so that stable shaving performance can be achieved.

[0165] Even if the same force is applied to the front and rear areas of the razor cartridge (1) due to the pressure generated during shaving, at least a portion of the front support portion (30), i.e., the front extension portion (34), and at least a portion of the rear support portion (50), i.e., the rear extension portion (56), may be formed of different materials so that the range of motion of the front lubricating member (40) is greater than the range of motion of the rear lubricating member (60). The front extension portion (34) may be formed of a material that is more easily elastically deformed than the rear extension portion (56).

[0166] Alternatively, the front support (30) and the rear support (50) may be formed of the same material, but may be configured to have different structural characteristics so that the range of motion of the front lubrication member (40) is greater than the range of motion of the rear lubrication member (60). For example, the front extension (34) may be formed to have a smaller longitudinal cross-sectional area, longitudinal width, or vertical thickness than the rear extension (56). For example, when the front support (30) and the rear support (50) are formed of an inelastic material (e.g., ABS, PP, etc.), the thickness of the front extension (34) may be formed to be thinner in the vertical direction than the thickness of the rear extension (56), so that both the front support (30) and the rear support (50) may have a structure that can elastically pivot with respect to the housing cover (220), but the strain of the front support (30) may be configured to be greater than the strain of the rear support (50). Alternatively, the longitudinal (Y-direction) length of the front extension (34) may be formed shorter than the longitudinal length of the rear extension (56). In addition, various configurations may be adopted so that the movable range of the front lubrication member (40) is greater than the movable range of the rear lubrication member (60).

[0167] Those skilled in the art will appreciate that the present invention can be implemented in other specific forms without altering its technical spirit or essential characteristics. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims below rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

Claims

1. A razor blade with a cutting edge formed at the end; A frame longitudinally receiving at least one razor blade such that at least a portion of the cutting edge is exposed upward; A front support extending forward from the frame toward which the cutting edge faces; A front lubricating member supported on the front support member; a rear support extending rearward from the frame; and A rear lubricating member supported by the rear support member; The front support portion elastically supports the front lubricating member, and the rear support portion elastically supports the rear lubricating member. A razor cartridge, wherein the strain of the rear support with respect to the frame is less than the strain of the front support with respect to the frame.

2. In paragraph 1, The front support member is formed to be rotatable relative to the frame, and supports the front lubrication member to be rotatable relative to the frame. The above rear support member is formed to be rotatable relative to the frame and supports the rear lubrication member to be rotatable relative to the frame, A razor cartridge having a rotation range of the front support portion that is greater than or equal to the rotation range of the rear support portion.

3. In paragraph 2, The rotation range of the above front support is 10 to 50 degrees, A razor cartridge having a rotation range of the rear support member of 10 to 40 degrees.

4. In paragraph 1, A razor cartridge, wherein the displacement by which the front lubricating member moves between the resting state and the shaving state when no external force is applied is greater than the displacement by which the rear lubricating member moves between the resting state and the shaving state.

5. In paragraph 1, The vertical displacement ratio of the front free end with respect to the force acting in the vertical direction on the front lubricating member is A razor cartridge having a vertical displacement rate of the rear free end greater than that of the force acting in the vertical direction on the rear lubricating member.

6. In paragraph 1, The above frame includes a guard portion formed in front of the cutting edge and in contact with the skin, and a cap portion formed in the rear of the cutting edge and in contact with the skin. The above guard portion and the above cap portion define a shaving plane, which is a plane on which shaving is performed on the skin, A razor cartridge, wherein, based on the vertical direction perpendicular to the longitudinal direction, the distance between the highest point of the front lubricating member and the shaving plane is greater than the distance between the highest point of the rear lubricating member and the shaving plane.

7. In paragraph 1, The skin contact plane that simultaneously contacts the upper surface of the front lubricating member and the upper surface of the rear lubricating member is It is variable between the first skin contact plane in the resting state when no external force is applied and the second skin contact plane in the shaving state. A razor cartridge, wherein the first skin contact plane and the second skin contact plane are not parallel to each other.

8. In paragraph 7, A razor cartridge, wherein the intersection of the first skin contact plane and the second skin contact plane is located closer to the rear lubricating member than to the front lubricating member.

9. In paragraph 1, The skin contact plane that simultaneously contacts the upper surface of the front lubricating member and the upper surface of the rear lubricating member is It is variable between the first skin contact plane in the resting state when no external force is applied and the second skin contact plane in the shaving state. A razor cartridge, wherein the first skin contact plane and the second skin contact plane are parallel to each other.

10. In paragraph 1, The above frame includes a guard portion positioned in front of the cutting edge and in contact with the skin in the shaving state, and a cap portion positioned in the rear of the cutting edge and in contact with the skin. A razor cartridge, wherein, in a resting state in which no external force is applied, at least a portion of the front lubricating member and at least a portion of the rear lubricating member protrude upward from the shaving plane.

11. In paragraph 10, In the above rest state, A razor cartridge, wherein the distance between the shaving plane and the highest point of the front lubricating member is greater than or equal to the distance between the shaving plane and the highest point of the rear lubricating member.

12. In paragraph 10, In shaved condition, A razor cartridge, wherein at least a portion of the upper surface of the front lubricating member and at least a portion of the upper surface of the rear lubricating member are positioned adjacent to the shaving plane.

13. In paragraph 1, The above frame is, A razor housing having a mounting portion formed to mount the razor blade; and A razor cartridge comprising a housing cover that surrounds at least a portion of the razor blade housing and is coupled to the razor blade housing.

14. In paragraph 13, The housing cover includes a side wall portion surrounding at least a portion of the outer surface of the razor housing, A razor cartridge in which the side wall portion protrudes downward from the lower surface of the razor blade housing.

15. In paragraph 13, The above razor blade housing is inserted from the bottom toward the top of the housing cover and is coupled to the housing cover, A razor cartridge, wherein a connecting portion for fixing the razor blade housing is formed at the lower portion of the housing cover.

16. In paragraph 13, The above housing cover includes a razor blade cover positioned on top of the razor blade, A razor cartridge further comprising a corrosion-preventing member provided between the razor blade cover and the razor blade.

17. In paragraph 16, A razor cartridge wherein at least a portion of said corrosion-preventing member is not positioned below said blade.

18. In paragraph 13, The above housing cover, A razor cover positioned on the upper portion of the razor blade and a side wall portion surrounding at least a portion of the outer surface of the razor blade housing, A razor cartridge having a through hole open in an outward direction formed between the razor blade cover and the side wall portion.

19. In paragraph 1, A razor cartridge wherein the front support portion and the rear support portion are formed of different materials.

20. In paragraph 1, The above front support portion includes a front extension portion extending forward from the frame, The rear support portion includes a rear extension extending rearward from the frame, A razor cartridge in which the thickness of the front extension is formed thinner than the thickness of the rear extension.

21. In paragraph 1, The above front support portion includes a front extension portion extending forward from the frame, The rear support portion includes a rear extension extending rearward from the frame, A razor cartridge, wherein the longitudinal length of the front extension is formed shorter than the longitudinal length of the rear extension.

22. A razor blade with a cutting edge formed at the end; A frame longitudinally receiving at least one razor blade such that at least a portion of the cutting edge is exposed upward; A front support extending forward from the frame toward which the cutting edge faces; A front lubricating member supported on the front support member; A rear support extending rearward from the above frame; A rear lubricating member supported by the rear support member; The front support elastically supports the front lubricating member, and the rear support elastically supports the rear lubricating member. A razor cartridge having a range of motion of the front support portion greater than the range of motion of the rear support portion.

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