Razor cartridge

Abstract

Disclosed is a razor cartridge. According to one embodiment disclosed herein, provided is a razor cartridge comprising: a frame including an accommodation space formed inside: a blade housing which accommodates at least one shaving blade in a longitudinal direction and is mounted to the frame along a mounting direction perpendicular to the longitudinal direction so as to enable at least one of movement or rotation; and a tension support unit for supporting the blade housing so that a restoring force for restoring the blade housing to a rest position is provided when the blade housing moves or rotates, wherein the frame includes a first recess formed on the upper portion of a frame side wall along the longitudinal direction, and a second recess spaced apart from the first recess in the mounting direction and formed on the frame side wall, and a mounting protrusion formed on a housing side wall along the longitudinal direction of the blade housing is inserted into the second recess through the first recess to mount the blade housing to the frame.

Description

razor cartridge

[0001] The present disclosure relates to a razor cartridge.

[0002] The material described in this section merely provides background information for the present disclosure and does not constitute prior art.

[0003] A conventional wet razor assembly includes a razor cartridge and a razor handle. The razor cartridge may include a blade housing, a guard bar, a cap, and at least one shaving blade disposed between the guard bar and the cap.

[0004] The razor cartridge may be configured to be rotatable about the razor handle between a rest position and a pivot position. The rotation of the razor cartridge relative to the razor handle is essentially about a rotational axis parallel to the direction of extension of the shaving blade.

[0005] When the razor cartridge is configured to rotate around a rotational axis, the shaving blades come into smooth contact with the cutting surface, the user's skin, thereby helping to provide an efficient shave.

[0006] However, when the razor cartridge is configured to rotate only around the handle, as in the conventional razor assembly described above, the razor cartridge has limited ability to adhere closely to the user's skin, which curves in various directions. Therefore, an effective structure that further enhances shaving performance is needed.

[0007] Additionally, if the shaving blade contacts the user's skin with excessive pressure, such as when the user applies excessive force, the user's skin may be cut by the blade. Therefore, a structure that reduces irritation to the user's skin during shaving is necessary.

[0008] A razor cartridge according to one embodiment may improve shaving performance by utilizing a blade housing mounted on a frame to be movable and / or rotatable and a tension support member to provide restoring force.

[0009] A razor cartridge according to one embodiment is configured such that the shaving blades can retract when they come into contact with the user's skin under excessive pressure, thereby reducing skin irritation of the user during shaving.

[0010] The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0011] According to one embodiment of the present disclosure, a razor cartridge is provided, comprising: a frame including an accommodation space formed therein; a blade housing that accommodates at least one shaving blade in a longitudinal direction and is mounted on the frame along a mounting direction perpendicular to the longitudinal direction so as to allow at least one of movement and rotation; and a tension support member that supports the blade housing so as to provide a restoring force for returning the blade housing to a resting position when the blade housing moves or rotates, wherein the frame includes a first recess formed on an upper portion of a frame side wall along the longitudinal direction; and a second recess formed on the frame side wall spaced apart from the first recess along the mounting direction, wherein a mounting protrusion formed on the housing side wall along the longitudinal direction of the blade housing is inserted into the second recess through the first recess, thereby mounting the blade housing on the frame.

[0012] According to another embodiment of the present disclosure, a razor cartridge is provided, comprising: a frame including an accommodation space formed therein and at least one recess formed in a side wall; a blade housing mounted to the frame to accommodate at least one shaving blade in a longitudinal direction and to enable at least one of movement and rotation, including a mounting protrusion inserted into the at least one recess; and a tension support portion supporting the blade housing to provide a restoring force for returning the blade housing to a resting position when the blade housing moves or rotates, wherein the mounting protrusion is formed in a central portion along a transverse direction perpendicular to the longitudinal direction of a side wall of the blade housing.

[0013] In one embodiment, the razor cartridge has the effect of improving shaving closeness by utilizing a blade housing mounted on a frame so as to be movable and / or rotatable and a tension support member providing restoring force.

[0014] In one embodiment, the razor cartridge is configured to retract when the shaving blades contact the user's skin with excessive pressure, thereby reducing skin irritation of the user during shaving.

[0015] FIG. 1 is a perspective view of a razor cartridge according to one embodiment of the present disclosure.

[0016] FIG. 2 is a rear perspective view of a razor cartridge according to one embodiment of the present disclosure.

[0017] FIG. 3 is an exploded perspective view and a partially enlarged view of a razor cartridge according to one embodiment of the present disclosure.

[0018] Fig. 4 is a cross-sectional view taken along line Ⅳ-Ⅳ' of Fig. 2, and is a drawing for explaining the inclined portion of the mounting protrusion and the first recess.

[0019] Figure 5 is a cross-sectional view taken along line V-V' of Figure 2.

[0020] FIG. 6 is a drawing showing a blade housing moving up and down while mounted on a frame according to one embodiment of the present disclosure.

[0021] FIG. 7 is a drawing showing a blade housing that rotates forward and backward while mounted on a frame according to one embodiment of the present disclosure.

[0022] FIG. 8 is a drawing showing a blade housing that rotates about a transverse direction while mounted on a frame according to one embodiment of the present disclosure.

[0023] FIG. 9 is a perspective view of a razor cartridge according to another embodiment of the present disclosure.

[0024] FIG. 10 is a rear perspective view of a razor cartridge according to another embodiment of the present disclosure.

[0025] FIG. 11 is an exploded perspective view and a partially enlarged view of a razor cartridge according to another embodiment of the present disclosure.

[0026] Hereinafter, some embodiments of the present disclosure will be described in detail using exemplary drawings. When designating components in each drawing, it should be noted that, where possible, identical components are given the same reference numerals, even if they appear in different drawings. Furthermore, when describing the present disclosure, detailed descriptions of related known components or functions will be omitted if they are deemed to obscure the gist of the present disclosure.

[0027] In describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by the terms.

[0028] When a component is described as being 'connected', 'coupled' or 'connected' to another component, it should be understood that the component may be directly connected or connected to that other component, but that another component may also be 'connected', 'coupled' or 'connected' between the components.

[0029] Throughout the specification, when a part is said to 'include' or 'have' a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise specifically stated.

[0030] Terms such as ‘part’, ‘module’, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software.

[0031] Unless stated otherwise, the description of any one embodiment is intended to be applicable to other embodiments.

[0032] The following description of the invention, together with the accompanying drawings, is intended to explain exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced.

[0033] FIG. 1 is a perspective view of a razor cartridge according to one embodiment of the present disclosure.

[0034] FIG. 2 is a rear perspective view of a razor cartridge according to one embodiment of the present disclosure.

[0035] FIG. 3 is an exploded perspective view and a partially enlarged view of a razor cartridge according to one embodiment of the present disclosure.

[0036] Referring to FIGS. 1 to 3, a razor cartridge (100) according to one embodiment of the present disclosure may include a frame (110), a blade housing (120), a guard portion (130), a cap portion (140), and / or a tension supporting unit (230). The guard portion (130) and the cap portion (140) may be components included in the frame (110).

[0037] The frame (110) may include a first recess (311), a second recess (312), a frame side wall (313), and / or a frame alignment member (314).

[0038] The blade housing (120) may include a mounting protrusion (321), a housing side wall (322), and / or a blade housing alignment member (323).

[0039] The tension support unit (230) may include a first supporting unit (231) and a second supporting unit (232).

[0040] The second support member (232) may include a base (base, 232a) and a leg (leg, 232b).

[0041] The frame (110) includes a housing receiving space (115) formed therein. A blade housing (120) is mounted in the housing receiving space (115) of the frame (110) so as to be movable and / or rotatable. The blade housing (120) can be mounted on the frame (110) along a mounting direction. Here, the mounting direction is a direction perpendicular to the longitudinal direction, which is the extension direction of the blade housing (120) and the shaving blade (121), and means the up-down direction of FIGS. 5 to 7 (see arrows in FIG. 3). In other words, the blade housing (120) may include an upper portion where the cutting edge of the shaving blade (121) accommodated therein is exposed, and a lower portion opposite thereto, and the mounting direction means a direction from the upper portion to the lower portion. The frame (110) may include one or more recesses (311, 312) so that the blade housing (120) can be mounted, moved, and / or rotated. At this time, the rotation axis of the blade housing (120) is defined by the second recess (312) and the mounting protrusion (321), and when the second recess (312) and the mounting protrusion (321) are positioned close to the upper part of the razor cartridge (100) based on the mounting direction, the rotation axis of the blade housing (120) is formed adjacent to the user's skin during shaving, making it easy to achieve close shaving.

[0042] The first recess (311) may be formed on the upper portion of the frame side wall (313) along the longitudinal direction. The first recess (311) may be formed so that at least a portion thereof is inclined. As an example, at least a portion of the first recess (311) may have a chamfered shape. In this regard, the mounting protrusion (321) may also be formed so that at least a portion thereof is inclined.

[0043] By forming at least a portion of the first recess (311) to be inclined, when the blade housing (120) is mounted on the frame (110), the mounting projection (321) of the blade housing (120) can be smoothly mounted on the frame (110) via the inclined portion of the first recess (311). In Fig. 3, the inclined surface of the first recess (311) is illustrated as being flat, but the inclined surface of the first recess (311) may be curved.

[0044] The second recess (312) may be formed on the frame side wall (313) spaced apart from the first recess (311) along the mounting direction, i.e., the direction in which the blade housing (120) is mounted on the frame (110) (see FIG. 3). One side of the second recess (312) is configured to receive the mounting protrusion (321) of the blade housing (120) by being spaced apart from the first recess (311) along the mounting direction, and the second recess (312) may be formed long by extending from one side along the mounting direction. Since the second recess (312) is formed long from one side along the mounting direction, the blade housing (120) mounted on the frame (110) can move (up and down) along the shape of the second recess.

[0045] The second recess (312) may be formed in the center along the transverse direction of the frame side wall (313). Here, the transverse direction means a direction perpendicular to the mounting direction and the longitudinal direction. The blade housing (120) of the razor cartridge (100) according to one embodiment of the present disclosure is mounted on the frame (110) by having the mounting protrusion (321) inserted into one side of the second recess (312) through the first recess (311). Accordingly, the initial position (rest position) of the blade housing (120) with respect to the frame (110) is determined according to the position of one side of the second recess (312) and the position of the mounting protrusion (321).

[0046] Meanwhile, with regard to the structure in which the blade housing (120) is mounted on the frame (110) according to the present disclosure, it has been described that the mounting protrusion (321) of the blade housing (120) is inserted into the second recess (312) through the first recess (311) of the frame (110), but the mounting structure is not limited thereto, and it is to be noted that a structure in which a protrusion for mounting is formed on the frame side wall (313) and one or more recesses are formed on the housing side wall (322) of the blade housing (120) so that the blade housing (120) is mounted on the frame (110), i.e., a structure in which the male and female structures are reversed, may be formed.

[0047] A frame alignment member (314) may be formed on the front wall and / or the rear wall along the transverse direction of one of the frame (110) and the blade housing (120), and a blade housing alignment member (323) may be formed on the other front wall and / or the rear wall. FIG. 3 illustrates a case where the frame alignment member (314) is formed protrudingly on the front wall and / or the rear wall of the frame (110), and the blade housing alignment member (323) is formed in a recessed shape on the front wall and / or the rear wall of the blade housing (120), but is not necessarily limited thereto, and the male and female structures of the frame alignment member (314) and the blade housing alignment member (323) may be reversed so that a recessed alignment member is formed on the frame (110), and a protruding alignment member is formed on the blade housing (120), or may be implemented in a shape other than a protrusion and a recess within the scope of their function. Hereinafter, it is described that the frame alignment member (314) has a protrusion shape and the blade housing alignment member (323) has a recess shape.

[0048] Referring to FIG. 3, a frame alignment member (314) may be formed on the front wall and / or the rear wall of the frame (110), and a blade housing alignment member (323) may be formed on the front wall and / or the rear wall of the blade housing (120).

[0049] The frame alignment member (314) may be formed inside the housing receiving space (115) so as to protrude forward from the rear wall of the frame (110) and / or protrude rearward from the front wall. The blade housing alignment member (323) may be formed at the front and / or rear of the blade housing (120). As illustrated in FIG. 3, the blade housing alignment member (323) formed at the front of the blade housing (120) may be formed on the lower surface of the blade housing (120) along a direction toward the rear from the front wall of the blade housing (120) so that the frame alignment member (314) can be inserted when the blade housing (120) is mounted on the frame (110). The blade housing alignment member (323) formed at the rear of the blade housing (120) may be formed on the lower surface along a direction toward the front from the rear wall of the blade housing (120).

[0050] When the blade housing (120) is mounted on the frame (110), the frame alignment member (314) is inserted into the blade housing alignment member (323) to prevent the blade housing (120) from shaking in the longitudinal direction, etc., due to manufacturing tolerances of the parts. The shaking phenomenon can be prevented without hindering the movement and / or rotation of the blade housing (120) while it is mounted on the frame (110) by the frame alignment member (314) and the blade housing alignment member (323). In addition, the blade housing (120) can be prevented from moving excessively downward with respect to the frame (110) by the frame alignment member (314) and the blade housing alignment member (323).

[0051] The blade housing (120) accommodates at least one shaving blade (121) in a longitudinal direction. The blade housing (120) is mounted on the frame (110) along a mounting direction so as to be movable and / or rotatable. The blade housing (120) can be mounted inside the frame (110), i.e., in the housing receiving space (115). The blade housing (120) can be configured to be movable up and down in a direction parallel to the mounting direction while mounted on the frame (110). The blade housing (120) can be configured to be rotatable about a straight line parallel to the longitudinal direction while mounted on the frame (110). The blade housing (120) can be configured to be rotatable (tiltable) about a straight line parallel to the transverse direction while mounted on the frame (110). That is, the blade housing (120) can be configured to be capable of all or part of movement, forward and backward rotation, and left and right rotation while mounted on the frame (110), and the movement of the blade housing (120) allows the user's skin and the razor cartridge (100) to easily come into close contact, enabling a close shave.

[0052] Referring to FIG. 3, a razor cartridge (100) according to one embodiment of the present disclosure can be assembled in the following order.

[0053] First, at least one shaving blade (121) can be placed in the blade receiving space (125) of the blade housing (120). Then, in order to secure at least one shaving blade (121) placed in the blade housing (120), a clip (150) can be positioned adjacent to the housing side wall (322), and at least a portion of the clip (150) can be bent to secure the clip (150) to the blade housing (120). In this case, one surface of the clip (150) can be in contact with the cutting edge. Thereafter, the blade housing (120) in which at least one shaving blade (121) and the clip (150) are assembled can be installed in the frame (110) according to the mounting direction. Meanwhile, the cap portion (140) can be installed on the rear side of the frame (110) regardless of the assembly order described above.

[0054] Fig. 4 is a cross-sectional view taken along line Ⅳ-Ⅳ' of Fig. 2, and is a drawing for explaining the inclined portion of the mounting protrusion and the first recess.

[0055] Referring to FIG. 4, the first recess (311) may be formed so that at least a portion thereof is inclined from a straight line (A) parallel to the longitudinal direction and a straight line (B) parallel to the mounting direction, based on a cross-section cut along the longitudinal direction, that is, a straight line (D) extending from at least a portion of the first recess (311) has a predetermined angle with respect to the straight line (A) parallel to the longitudinal direction and the straight line (B) parallel to the mounting direction. In this regard, the mounting protrusion (321) may also be formed so that at least a portion thereof is inclined from a straight line (A) parallel to the longitudinal direction and the straight line (B) parallel to the mounting direction, that is, a straight line (C) extending from at least a portion of the mounting protrusion (321) has a predetermined angle with respect to the straight line (A) parallel to the longitudinal direction and the straight line (B) parallel to the mounting direction.

[0056] By forming at least a portion of the first recess (311) to be inclined, when the blade housing (120) is mounted on the frame (110), the mounting projection (321) of the blade housing (120) can be smoothly mounted on the frame (110) via the inclined portion of the first recess (311). In FIGS. 3 and 4, the inclined surface of the first recess (311) is illustrated as being flat, but the inclined surface of the first recess (311) may also be curved.

[0057] The inclined portion of the first recess (311) may be formed to correspond to the inclined portion of the mounting protrusion (321) (e.g., the straight line (D) extending the inclined portion of the first recess (311) in FIG. 4 and the straight line (C) extending the inclined portion of the mounting protrusion (321) are parallel to each other), but is not limited thereto, and may be formed in various shapes within a range that allows the blade housing (120) to be easily mounted on the frame (110), such as where the straight line (D) extending the inclined portion of the first recess (311) and the straight line (C) extending the inclined portion of the mounting protrusion (321) intersect, as illustrated in FIG. 4.

[0058] Based on a cross-section cut along the longitudinal direction, at least a portion of the mounting protrusion (321) may be formed to be inclined from a straight line (A) parallel to the longitudinal direction and a straight line (B) parallel to the mounting direction, that is, a straight line (C) extending from at least a portion of the mounting protrusion (321) may be formed to have a predetermined angle with the straight line (A) parallel to the longitudinal direction and the straight line (B) parallel to the mounting direction. Accordingly, as an example, the mounting protrusion (321) may have a shape in which at least a portion is chamfered.

[0059] By forming at least a portion of the mounting protrusion (321) to be inclined, when the blade housing (120) is mounted on the frame (110), the mounting protrusion (321) can be smoothly mounted on the frame (110) through the first recess (311).

[0060] As described above, the inclined portion of the mounting protrusion (321) may be formed to correspond to the inclined portion of the first recess (311), but is not limited thereto, and may be formed in another shape, such as a straight line (C) extending the inclined portion of the mounting protrusion (321) intersecting a straight line (D) extending the inclined portion of the first recess (311), as shown in FIG. 4.

[0061] According to one embodiment of the present disclosure, the razor cartridge (100) is formed so that at least a portion (e.g., a lower portion) of the mounting protrusion (321) is inclined, and at least a portion (e.g., an upper portion) of the first recess (311) is formed so that the blade housing (120) can be easily mounted on the frame (110). However, it should be noted that not all of the mounting protrusion (321) and the first recess (311) need to be formed so that a portion thereof is inclined, and only a portion of either the mounting protrusion (321) or the first recess (311) may be formed so that a portion thereof is inclined, so that the blade housing (120) can be easily mounted on the frame (110).

[0062] Fig. 5 is a side cross-sectional view taken along line V-V' of Fig. 2, showing a state in which the blade housing (120) is mounted on the frame (110) and positioned in a rest position.

[0063] Referring to FIG. 5, the blade housing (120) is mounted on the frame (110) such that at least a portion of the contact surface (Y) of the tension support member (230) that contacts the blade housing (120) in the rest position is located above the contact surface (Z) of the frame (110). Here, the contact surface (Z) of the frame (110) refers to a portion that contacts the lower surface (X) of the blade housing (120) as the blade housing (120) moves downward. For example, the contact surface (X) of the frame (110) according to one embodiment of the present disclosure may be formed on a wall extending longitudinally from the lower portion of the frame side wall (313), and the contact surface (X) of the frame (110) according to another embodiment of the present disclosure may be formed on a rib (250 of FIG. 10).

[0064] In this way, when the blade housing (120) is in the rest position, the contact surface (Y) of the tension support member (230) is positioned above the contact surface (Z) of the frame (110), so that the blade housing (120) can move downward from the rest position, and the blade housing (120) that has moved downward can move upward again by the restoring force provided by the tension support member (230), so that the blade housing (120) can move in the vertical direction. In addition, when the blade housing (120) moves downward, the lower surface (X) of the blade housing (120) comes into contact with the contact surface (Z) of the frame (110), so that the downward movement of the blade housing (120) is restricted, thereby preventing a phenomenon in which the blade housing (120) moves excessively and is separated from the frame (110).

[0065] Meanwhile, the shaving plane when the blade housing (120) is in the resting position can be defined by the front member (510) and the rear member (520) of the blade housing (120). The blade housing (120) can be installed on the frame (110) so that the shaving plane by the front member (510) and the rear member (520) in the resting position is located at the same level as or above the plane connecting the upper surface of the guard portion (130) and the upper surface of the cap portion (140). In order to further improve the adhesion between the razor cartridge (100) and the user's skin surface, the blade housing (120) can be installed on the frame (110) so that the distance between the shaving plane by the front member (510) and the rear member (520) of the blade housing (120) and the plane connecting the upper surface of the guard portion (130) and the upper surface of the cap portion (140) is greater.

[0066] As described above, the blade housing (120) is mounted on the frame (110) so that at least a portion (e.g., the lower surface) of the blade housing is in contact with the tension support member (230) so that a restoring force is transmitted from the tension support member (230) to the blade housing (120), and the blade housing (120) can return to the rest position by the restoring force transmitted from the tension support member (230) to the blade housing (120). In this case, the blade housing (120) may be in an initial state in which it is mounted on the frame (110), that is, in a state in which the blade housing (120) is positioned at the rest position, and the blade housing (120) presses the tension support member (230) (e.g., compressed by 0.1 mm to 0.3 mm, preferably 0.2 mm, along the mounting direction). Accordingly, when assembling the blade housing (120) and the frame (110), the blade housing (120) can be stably mounted on the frame (110) by preventing the blade housing (120) from being separated from the frame (110) due to injection tolerance or assembly tolerance, etc., and rattling.

[0067] The mounting protrusion (321) may be formed on the housing side wall (322) along the longitudinal direction of the blade housing (120). The mounting protrusion (321) may be formed to protrude in the longitudinal direction on both side walls (322) of the blade housing. As described above, the blade housing (120) may be mounted on the frame (110) by the mounting protrusion (321) being inserted into the second recess (312) through the first recess (311). The initial position of the blade housing (120) mounted on the frame (110) is determined by the positions of the mounting protrusion (321) and the second recess (312).

[0068] The mounting protrusion (321) may be formed in the central portion along the transverse direction of the housing side wall (322). Here, the central portion may mean the region with the greatest arrangement density of shaving blades (121) among the regions along the transverse direction of the blade housing (120). For example, when three shaving blades (121) are arranged from the front wall of the blade housing (120) to the 1 / 3 point along the transverse direction, five shaving blades (121) are arranged from the 1 / 3 point to the 2 / 3 point, and three shaving blades (121) are arranged again from the 2 / 3 point to the rear wall, the central portion of the housing side wall (322) may mean the region from the 1 / 3 point to the 2 / 3 point. Accordingly, when the shaving blades (121) are arranged in the front or rear of the blade housing (120), the mounting protrusions (321) may be arranged in the front or rear along the transverse direction of the housing side wall (322). In this case, the shaving force may be concentrated only in the area close to the mounting protrusions (321), so that only rotation rather than up-and-down movement of the blade housing (120) is possible, but the present invention is not limited thereto.

[0069] In addition, a plurality of mounting protrusions (321) may be formed in the transverse direction on the housing side wall (322), and the first recess (311) and the second recess (312) of the frame (110) for accommodating a plurality of mounting protrusions (321) may also be provided in a plurality. In this case, the up-and-down movement of the blade housing (120) relative to the frame (110) can be provided more stably than the rotation of the blade housing (120).

[0070] Meanwhile, when a plurality of shaving blades (121) are arranged at regular intervals along the transverse direction of the blade housing (120), i.e., a plurality of shaving blades (121) are uniformly arranged, the center of the housing side wall (322) may be a midpoint along the transverse length of the housing side wall (322).

[0071] In this way, since the mounting protrusion (321) is arranged at the transverse center of the housing side wall (322), unlike the general case where the rotation axis of a rotatable razor cartridge is arranged adjacent to the frontmost blade, the rotation axis of the blade housing (120) that rotates with respect to the frame (110) is provided at the transverse center, thereby providing the effect of evenly distributing the force transmitted to the razor cartridge (100) during shaving (shaving force) to the entire area of ​​the blade housing (120), i.e., to the multiple shaving blades (121). Meanwhile, it should be noted that the razor cartridge (100) according to one embodiment of the present disclosure may not only provide movement and / or rotation of the blade housing (120) with respect to the frame (110), but may also provide movement and / or rotation of the blade housing (120) with respect to the frame (110) and movement and / or rotation of the razor cartridge (100) with respect to the razor handle together.

[0072] According to one embodiment of the present disclosure, a razor cartridge (100) is configured such that at least a portion of a first recess (311) formed on an upper portion of a frame side wall (313) and / or a mounting protrusion (321) formed on a housing side wall (322) is formed to be inclined, a second recess (312) is formed to be elongated and spaced apart from the first recess (311) in a mounting direction, and the mounting protrusion (321) is inserted into the second recess (312) through the first recess (311) so that the blade housing (120) is mounted on the frame (110), so that the blade housing (120) is easily mounted on the frame (110), and the first recess (311) and the second recess (312) are spaced apart from each other, so that the mounted blade housing (120) does not easily come off from the frame (110).

[0073] The tension support member (230) is arranged to support the blade housing (120). Specifically, the tension support member (230) supports the blade housing (120) so that when the blade housing (120) mounted on the frame (110) moves and / or rotates, a restoring force is transmitted to return the blade housing (120) to its resting position.

[0074] The tension support member (230) is configured to provide restoring force to the blade housing (120). For example, the tension support member (230) may include an elastic material (e.g., rubber, plastic, etc.).

[0075] In order to transmit a restoring force to the blade housing (120) that has been moved and / or rotated from its rest position, the tension support member (230) may be positioned to contact at least a portion of one surface (e.g., the lower surface) of the blade housing (120) when the blade housing (120) is mounted on the frame (110). The tension support member (230) may be formed integrally with the frame (110). The first support member (231) may be manufactured by double injection molding with the frame (110), and the second support member (232) may be formed as a separate member and installed on the frame (110), but may also be formed integrally by injection molding together with the frame (110).

[0076] The first support portion (231) may be arranged to cross the lower portion of the frame (110) in the transverse direction. The first support portion (231) may be formed in the shape of a bridge that crosses the open lower surface of the frame (110) in the transverse direction. There may be one or more first support portions (231), and preferably, there may be a plurality of first support portions. The first support portions (231) may be arranged on one longitudinal side and / or the other longitudinal side of the frame (110). The first support portion (231) may be made of a rubber material. The first support portion (231) may contact at least a portion (e.g., a lower surface) of the blade housing (120) mounted on the frame (110) to transmit a restoring force, thereby moving and / or rotating the blade housing (120) to a resting position.

[0077] Based on the cross-sectional view of Fig. 5, the first support member (231) may be positioned so that the contact surface (Y) of the tension support member (230) is located above the contact surface (Z) of the frame (110). In addition, in the initial state (resting position) in which the blade housing (120) is mounted on the frame (110), the first support member (231) may be in a state in which it is pressed by the blade housing (120) (e.g., compressed by about 0.2 mm along the mounting direction). Accordingly, when assembling the blade housing (120) and the frame (110), the phenomenon in which the blade housing (120) is separated from the frame (110) and rattles due to injection tolerance or assembly tolerance is prevented, thereby allowing the blade housing (120) to be stably mounted on the frame (110).

[0078] The second support member (232) may include a base (232a) fixed to the lower portion of the frame (110) and a plurality of legs (232b) extending from the base (232a) to support the blade housing (120). The base (232a) may be formed to extend in a transverse direction. The plurality of legs (232b) may extend from the base (232a) such that at least a portion thereof is adjacent to the lower surface of the blade housing (120). The legs (232b) may extend in a direction different from the longitudinal direction from the base (232a) such that at least a portion thereof faces the blade housing (120). The legs (232b) may extend so as to have a predetermined angle with respect to a straight line parallel to the longitudinal direction. The legs (232b) may provide a restoring force to the blade housing (120) by extending from the base (232a) in a direction different from the longitudinal direction such that at least a portion thereof contacts the lower surface of the blade housing (120). The second support member (232) may be made of plastic material.

[0079] In addition, when compared to the case where the tension support member (230) includes only the second support member (232) or the case where the tension support member (230) includes both the first support member (231) and the second support member (232), smooth movement and pivoting of the blade housing (120) with respect to the frame (110) can be provided. In addition, when the tension support member (230) does not include the second support member (232) with a relatively larger area, the area of ​​the open area of ​​the frame (110) formed along the mounting direction can be further expanded.

[0080] A razor cartridge (100) according to one embodiment of the present disclosure may include a guard portion (130) and a cap portion (140). The guard portion (130) may be positioned at the front of the frame (110), and the cap portion (140) may be positioned at the rear of the frame (110).

[0081] FIG. 6 is a drawing showing a blade housing (120) moving up and down while mounted on a frame (110) according to one embodiment of the present disclosure.

[0082] FIG. 7 is a drawing showing a blade housing (120) that rotates forward and backward while mounted on a frame (110) according to one embodiment of the present disclosure.

[0083] FIG. 8 is a drawing showing a blade housing (120) that rotates about the transverse direction while mounted on a frame (110) according to one embodiment of the present disclosure.

[0084] Referring to FIGS. 6 to 8, as described above, the blade housing (120) of the razor cartridge (100) according to one embodiment of the present disclosure may be mounted on the frame (110) so as to be movable and / or rotatable relative to the frame (110).

[0085] Specifically, as illustrated in FIG. 6, the blade housing (120) can move downward from the rest position along the mounting direction, and can move upward again to return to the rest position by a restoring force transmitted from the tension support member (230). For example, the blade housing (120) can move 0.5 mm to 2.0 mm along the mounting direction from the rest position, and preferably can move 1.0 mm.

[0086] Additionally, as illustrated in FIG. 7, the blade housing (120) can rotate forward and backward from a resting position about a straight line parallel to the longitudinal direction, and can rotate back to the resting position by a restoring force transmitted from the tension support member (230). For example, the blade housing (120) can rotate forward and backward by 2° to 8°, and suitably by 5°.

[0087] As illustrated in FIG. 8, as described above, the blade housing (120) according to one embodiment of the present disclosure may rotate (tilt) about a straight line parallel to the transverse direction while mounted on the frame (110).

[0088] In this way, the razor cartridge (100) according to one embodiment of the present disclosure can improve shaving closeness performance and reduce skin irritation of the user during shaving by using a blade housing (120) and a tension support member (230) that are mounted on a frame (110) so as to be movable and / or rotatable, and the blade housing (120) is easily mounted on the frame (110) through a structure including a first recess (311), a second recess (312), and a mounting protrusion (321), but the mounted blade housing (120) is not easily detached, and the mounting protrusion (321) is arranged at the transverse center of the housing side wall (322) so that the force (shaving force) is evenly distributed.

[0089] Meanwhile, as described above, the shaving plane of the razor cartridge (100) can be defined by the front member (510) and the rear member (520) of the blade housing (120). As shown in FIG. 6, when the blade housing (120) moves up and down with respect to the frame (110), the shaving plane can be positioned below or on the same line as the plane connecting the guard part (130) and the cap part (140). Accordingly, even if the razor cartridge (100) passes over the user's excessively curved skin, the shaving plane by the blade housing (120) is maintained while being supported by the wide area formed by the guard part (130) and the cap part (140), so that safe hair cutting can be achieved.

[0090] FIG. 9 is a perspective view of a razor cartridge (200) according to another embodiment of the present disclosure.

[0091] FIG. 10 is a rear perspective view of a razor cartridge (200) according to another embodiment of the present disclosure.

[0092] FIG. 11 is an exploded perspective view and a partially enlarged view of a razor cartridge (200) according to another embodiment of the present disclosure.

[0093] The razor cartridge (200) according to another embodiment of the present disclosure may be equally applied to the razor cartridge (100) according to one embodiment of the present disclosure, except for the matters described below.

[0094] Referring to FIGS. 9 to 11, unlike one embodiment of the present disclosure in which the tension support member (230) may include a first support member (231) and a second support member (232), the tension support member (230) according to another embodiment of the present disclosure may include only the first support member (231) according to one embodiment, that is, the tension support member (230) may be arranged only so as to cross the lower portion of the frame (110) in the transverse direction. However, the tension support member (230) is not necessarily required to be arranged only in the transverse direction, and may be arranged in various directions, including the longitudinal direction, as long as it crosses the lower portion of the frame (110).

[0095] According to another embodiment of the present disclosure, a razor cartridge (200) may not include a configuration such that the tension support member (230) includes an elastic material and the second support member (232) is made of a plastic material. In this case, excessive restoring force may be prevented from being provided to the blade housing (120), and movement of the blade housing (120) according to skin curvature may also be made smoother.

[0096] In addition, the tension support member (230) may be formed integrally with the frame (110) using a double injection method, in which case a separate assembly process for forming the tension support member (230) may not be necessary. In addition, when the tension support member (230) includes an elastic material, the possibility of the tension support member (230) being detached from the frame (110) or damaged due to the dropping of the razor cartridge (200) or repetitive movement of the blade housing (120) may be reduced.

[0097] In FIGS. 10 and 11, the tension support member (230) is illustrated as being arranged one on each of one longitudinal side and the other longitudinal side, but it is not necessarily limited to this, and it is also possible to arrange a plurality of tension support members on each of one longitudinal side and the other longitudinal side.

[0098] The frame (110) may be configured such that an area corresponding to at least one clip (150) for fixing at least one shaving blade (121) on at least one longitudinal side is open along the mounting direction. In this case, since a wall extending longitudinally from the lower portion of the frame side wall (313) may not be formed, the phenomenon of shaving residue and water accumulating between the wall extending longitudinally from the lower portion of the frame side wall (313) and the blade housing (120) during washing can be prevented, and since the area of ​​the open area of ​​the frame (110) formed along the mounting direction is increased, washing of the razor cartridge (200) can be made easier.

[0099] Meanwhile, each of at least one clip (150) may include a clip body (151), a first leg portion (152) extending from the clip body (151), and a second leg portion (153) extending from one end of the first leg portion (152). In a state where at least one clip (150) is fixed to the blade housing (120), the first leg portion (152) may extend from the clip body (151) toward the lower portion of the frame (110), and the second leg portion (153) may extend in a direction different from the extending direction of the first leg portion (152). The clip body (151) may be exposed to the outside at the upper portion of the frame (110), and the second leg portion (153) may be exposed to the outside at the lower portion of the frame (110).

[0100] Referring to FIG. 11, a razor cartridge (200) according to another embodiment of the present disclosure can be assembled in the following order.

[0101] First, the blade housing (120) can be inserted and installed into the housing receiving space (115) of the frame (110). Thereafter, at least one shaving blade (121) can be placed in the blade receiving space (125) of the blade housing (120). Thereafter, in order to secure at least one shaving blade (121) placed in the blade housing (120), a clip (150) is positioned adjacent to the housing side wall (322), and the first leg (152) and the second leg (153) of the clip (150) can be bent to secure the clip (150) to the blade housing (120). In this case, at least one clip (150) can be coupled by penetrating the frame (110), and at least a portion of each of at least one clip (150) can be exposed to the outside from the lower portion of the frame (110). More specifically, one side of the clip body (151) can be in contact with the cutting edge, the first leg portion (152) can penetrate the housing receiving space (115) of the frame (110), and the second leg portion (153) can be in contact with the lower part of the blade housing (120). Meanwhile, the cap portion (140) can be installed on the rear side of the frame (110) regardless of the assembly order described above.

[0102] Meanwhile, when the blade housing (120) is installed on the frame (110) and viewed from one side in the longitudinal direction, the housing side wall (322) may be completely covered by the frame side wall (313), but this is not necessarily limited to the case, and a portion of the housing side wall (322) may be exposed from the frame side wall (313). For example, a portion of the housing side wall (322) may be exposed from the frame side wall (313) when the razor cartridge (200) is in the resting position.

[0103] When a portion of the housing side wall (322) is exposed from the frame side wall (313), the area adjacent to the housing side wall (322), i.e., the area where at least one clip (150) is installed in the blade housing (120), is not completely covered by the frame (110), so that assembly of at least one clip (150) to the blade housing (120) can be made easier.

[0104] According to another embodiment of the present disclosure, a razor cartridge (200) may further include at least one rib (250) that is spaced longitudinally from the frame side wall (313) and configured to transversely cross the lower portion of the frame (110). For example, the at least one rib (250) may be arranged between the tension support member (230) and the frame side wall (313) in the longitudinal direction, but is not necessarily limited thereto. The at least one rib (250) may prevent damage to the frame (200) due to dropping of the razor cartridge (200), etc.

[0105] At least one rib (250) can support the lower portion of the blade housing (120) when the blade housing (120) moves up and down, thereby preventing excessive movement of the blade housing (120) with respect to the frame (110). At least one rib (250) can be made of a plastic material, but is not necessarily limited thereto.

[0106] In addition, at least one rib (250) can be formed lower than the lower portion of the tension support member (230) based on the mounting direction, so that excessive movement toward the lower portion of the blade housing (120) can be prevented without interfering with the cleaning of the blade housing (120).

[0107] Meanwhile, a razor cartridge (200) according to another embodiment of the present disclosure may include at least one rib (250) instead of a wall extending longitudinally from the lower portion of the frame side wall (313), thereby allowing a larger rotational range centered on the transverse direction of the blade housing (120).

[0108] The above description is merely an example of the technical idea of ​​the present embodiment, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present embodiment. Therefore, the present embodiments are not intended to limit the technical idea of ​​the present embodiment, but rather to explain it, and the scope of the technical idea of ​​the present embodiment is not limited by these embodiments. The scope of protection of the present embodiment should be interpreted by the claims below, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of rights of the present embodiment.

[0109] [Description of symbols] 100: razor cartridge, 110: frame, 115: housing receiving space, 120: blade housing, 121: shaving blade, 125: blade receiving space, 130: guard part, 140: cap part, 150: clip, 151: clip body, 152: first leg part, 153: second leg part, 230: tension support part, 231: first support part, 232: second support part, 232a: base, 232b: leg, 250: rib, 311: first recess, 312: second recess, 313: frame side wall, 314: frame alignment member, 321: mounting protrusion, 322: housing side wall, 323: blade housing alignment member, 510: front member, 520: Rear member

[0110] [CROSS-REFERENCE TO RELATED APPLICATION]

[0111] This patent application claims priority to Korean Patent Application No. 10-2023-0145295, filed October 27, 2023, and Korean Patent Application No. 10-2024-0145739, filed October 23, 2024, the entire contents of which are incorporated herein by reference.

Claims

1. A frame including a receiving space formed inside; A blade housing that accommodates at least one shaving blade longitudinally and is mounted to the frame along a mounting direction perpendicular to the longitudinal direction so as to be capable of at least one of movement and rotation relative to the frame; and A tension supporting unit is included to support the blade housing so as to provide a restoring force to return the blade housing to a rest position when the blade housing moves or rotates with respect to the frame. The above frame is, a first recess formed on the upper part of the frame side wall; and It includes a second recess formed on the side wall of the frame and spaced apart from the first recess along the mounting direction, A razor cartridge in which the blade housing is mounted on the frame by inserting a mounting protrusion formed on the housing side wall of the blade housing through the first recess into the second recess.

2. In paragraph 1, A razor cartridge in which at least one of the mounting protrusion and the first recess is formed such that at least a portion thereof is inclined from a straight line parallel to the longitudinal direction and a straight line parallel to the mounting direction, based on a cross-section cut along the longitudinal direction.

3. In paragraph 2, A razor cartridge in which at least a portion of the above-described mounting protrusion and at least a portion of the above-described first recess are formed in a shape corresponding to each other.

4. In paragraph 1, The above second recess is, One side is configured to receive the mounting protrusion by being spaced apart from the first recess along the mounting direction, A razor cartridge formed to extend from the above side along the mounting direction.

5. In paragraph 1, The above second recess is, Formed in the central portion along the transverse direction of the side wall of the above frame, A razor cartridge in which the above transverse direction is perpendicular to the above longitudinal direction and the above mounting direction.

6. In paragraph 1, The above blade housing, A razor cartridge that can move up and down in a direction parallel to the mounting direction while mounted on the above frame.

7. In paragraph 6, The blade housing is configured so that the contact surface of the tension support member is positioned above the contact surface of the frame when the blade housing is positioned in the rest position. The contact surface of the above frame is a razor cartridge that is a part that comes into contact with the lower surface of the blade housing as the blade housing moves downward.

8. In paragraph 1, The above blade housing, A razor cartridge that is rotatable around a direction parallel to the longitudinal direction while mounted on the frame.

9. In paragraph 1, A razor cartridge in which the blade housing is mounted on the frame so that the tension support member is pressed in the rest position.

10. In paragraph 1, A razor cartridge in which the tension support member is formed integrally with the frame.

11. In paragraph 1, A razor cartridge comprising an elastic material, wherein the tension support member is above.

12. In paragraph 1, The above tension support part is, A razor cartridge comprising at least one first support member extending across the lower portion of the frame along the longitudinal direction and the transverse direction perpendicular to the mounting direction.

13. In paragraph 12, The above tension support member includes a plurality of first support members, A razor cartridge in which the plurality of first support parts are arranged on one longitudinal side and the other longitudinal side of the frame.

14. In paragraph 1, The above tension support part is, a base fixed to the lower part of the above frame; and A razor cartridge comprising a second support portion including a plurality of legs extending from the base and supporting the blade housing.

15. In paragraph 14, The above base extends along a transverse direction perpendicular to the longitudinal direction, A razor cartridge wherein the plurality of legs extend so that at least a portion thereof is adjacent to the lower surface of the blade housing.

16. In paragraph 12, A razor cartridge further comprising at least one rib positioned between the frame side wall and the first support portion based on the longitudinal direction and crossing the lower portion of the frame along a transverse direction perpendicular to the longitudinal direction and the mounting direction.

17. A frame including a receiving space formed inside and at least one recess formed in a side wall; A blade housing mounted to the frame so as to be capable of at least one of movement and rotation relative to the frame, the blade housing including a mounting projection inserted into the at least one recess, and longitudinally receiving at least one shaving blade; and A tension support member that supports the blade housing so as to provide a restoring force to return the blade housing to a resting position when the blade housing moves or rotates with respect to the frame, A razor cartridge in which the above-mentioned mounting protrusion is formed in the central portion along the transverse direction perpendicular to the longitudinal direction of the side wall of the blade housing.

18. In paragraph 17, The above blade housing accommodates a plurality of shaving blades, The central portion is a razor cartridge in which the density of the shaving blades is the greatest among the areas along the transverse direction of the blade housing.

19. In paragraph 1, The above blade housing, A razor cartridge capable of tilting about an axis parallel to the longitudinal direction and the transverse direction perpendicular to the mounting direction.

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