Hair cutting kit

Abstract

A hair-cutting kit (10) comprises a cutting unit (30) and a comb (60). The comb (60) comprises an array of comb tines (70). Some or all of the comb tines (70) comprise, on an outer surface thereof, a skin surface (71) configured to slide over a user's skin, a delivery surface (72) configured to deliver hair towards the cutting unit, and a transition surface (73) between the skin surface and the delivery surface. The skin surface has a first radius of curvature (R S ), and the feed surface has a first surface contour (81) having a second radius of curvature (R p ), where the first radius of curvature is greater than the second radius of curvature.

Description

[Technical Field]

[0001] The embodiment relates to a hair cutting kit. The embodiment, in particular, relates to a hair cutting kit comprising a comb that can be releasably attached to a cutting unit. [Background technology]

[0002] For example, hair trimmers or clippers are used for body grooming, but in body grooming, the user primarily desires to achieve an aesthetic effect by completely removing hair from other areas of the body, such as the armpit area, bikini area, or genital area.

[0003] When a hair trimmer is used directly on the skin, the hair is cut to a length determined by the trimmer's blade configuration. To achieve longer hair lengths, a comb that can be attached to the device may be used. Such a comb is also called a distance comb.

[0004] Distance combs can be shaped so that the tips of the comb teeth are spherical or approximate spherical. The surface is rounded to create a good feel against the skin. The skin surface of the comb teeth that contacts the user's skin and / or the supply surface of the comb teeth that supplies hair toward the cutting unit may have a radius smaller than the radius at the tips of the comb teeth.

[0005] However, facial skin has different mechanical properties than the skin of other body areas such as the axillary or genital areas. A comb with the comb tooth shape described above can cause the skin to bulge between the comb teeth. This is especially true in areas where the skin is thinner and more flexible than facial skin (such as the axillary or genital areas). The comb tooth shape described above can tend to act as a funnel, as a result of the skin within the funnel being pushed together and bulging upward. This bulging skin can then enter the cutting system, which increases the risk of injury. When the comb is used over short distances, there is a risk that the bulging skin may be cut by the blade.

[0006] Many conventional cutting unit-comb kits are optimized for use on facial skin. When such kits are used on areas of the body where the skin is thinner or more flexible than facial skin (e.g., the armpit or genital area), there is a risk that the skin will be cut by the cutting unit's blades. [Overview of the project] [Problems that the invention aims to solve]

[0007] The object of the present invention is to provide a device and / or kit that mitigates at least some of the above-mentioned drawbacks in the art. [Means for solving the problem]

[0008] An improved hair cutting kit is needed. A hair cutting kit is needed that reduces the risk of skin damage while providing good cutting efficiency and user comfort, especially for body hair trimming. Alternatively, or in addition to the above, a hair cutting kit is needed that reduces significant skin bumps, especially for body hair trimming. Alternatively, or in addition to the above, a hair cutting kit is needed that includes a comb suitable for use on facial skin, as well as on other body areas, while reducing the risk of skin damage in body areas where the skin is thinner and / or more flexible than facial skin.

[0009] According to one aspect, a hair cutting kit includes a handle, a cutting unit, and a comb.

[0010] The cutting unit is configured to be disposed or disposable on the handle and includes a fixed blade and a movable blade. The fixed blade includes a row of first blade teeth having free ends of the first blade teeth. The movable blade may be configured to reciprocate relative to the fixed blade.

[0011] The comb is configured to be reversibly and releasably assembled to the cutting unit. The comb has a skin surface. The comb includes a base portion facing the skin surface and a row of comb teeth. The row of comb teeth extends in a first direction. Adjacent comb teeth are separated along the first direction by a gap. Each comb tooth has a central plane that traverses (e.g., is perpendicular to) the first direction. Each comb tooth extends along its central plane.

[0012] Some or all of the comb teeth include a skin surface configured to slide on the user's skin on an outer surface configured to face away from the fixed blade and the movable blade, a supply surface configured to supply hair toward the cutting unit, and a transition surface between the skin surface and the supply surface.

[0013] The skin surface has a first surface contour line having a first radius of curvature. The supply surface has a second surface contour line having a second radius of curvature. The first radius of curvature may be greater than the second radius of curvature.

[0014] Alternatively or in addition, the transition surface may have a third surface contour line having a third radius of curvature that is less than the first and / or second radius of curvature.

[0015] According to one aspect, a hair cutting kit includes a handle, a cutting unit, and a comb.

[0016] The cutting unit is configured to be mounted on or can be configured on a handle and comprises a stationary blade and a movable blade. The stationary blade comprises a row of first blade teeth having free ends of the first blade teeth. The movable blade may be configured to reciprocate relative to the stationary blade.

[0017] The comb is configured to be reversibly releasably assembled to the cutting unit. The comb has a skin surface. The comb comprises a base portion facing the skin surface and a row of comb teeth. The row of comb teeth extends in a first direction. Adjacent comb teeth are separated along the first direction by gaps. Each comb tooth has a central plane that transverses the first direction (e.g., perpendicular). Each comb tooth extends along its central plane.

[0018] Some or all of the comb teeth have an outer surface configured to face away from the fixed and movable blades, a skin surface configured to glide over the user's skin, a supply surface configured to supply hair toward the cutting unit, and a transition surface between the skin surface and the supply surface.

[0019] The surface of the first cylindrical segment circumscribing the skin surface has a first radius of curvature. The surface of the second cylindrical segment circumscribing the supply surface has a second radius of curvature. The first radius of curvature is greater than the second radius of curvature.

[0020] According to one embodiment, a comb is provided for use with a hair cutting unit. The comb is configured to be reversibly and releasably assembled to the cutting unit. The comb comprises a base portion and a row of comb teeth. The row of comb teeth extends in a first direction. Adjacent comb teeth are separated along the first direction by a gap. Each comb tooth has a central plane that transverses the first direction (e.g., perpendicular). Each comb tooth may extend along its central plane.

[0021] Some or all of the comb teeth have an outer surface configured to face away from the fixed and movable blades, a skin surface configured to glide over the user's skin, a supply surface configured to supply hair toward the cutting unit, and a transition surface between the skin surface and the supply surface.

[0022] The skin surface has a first surface contour line having a first radius of curvature, and the supply surface has a second surface contour line having a second radius of curvature.

[0023] The first radius of curvature may be greater than the second radius of curvature.

[0024] According to one embodiment, the use of a comb is provided for reducing skin bulges, particularly in the axillary or genital area of ​​the body, when assembled to a hair cutting unit. The use involves reversibly disengaging the comb from the cutting unit. The comb comprises a base portion and a row of comb teeth. The row of comb teeth extends in a first direction, and adjacent comb teeth are separated along the first direction by gaps. Each comb tooth has a central plane (e.g., perpendicular) that transverses the first direction. Each comb tooth extends along its central plane. Some or all of the comb teeth have an outer surface configured to face away from the fixed and movable blades, a skin surface configured to slide over the user's skin, a supply surface configured to supply hair toward the cutting unit, and a transition surface between the skin surface and the supply surface. The skin surface has a first surface contour line having a first radius of curvature, and the supply surface has a second surface contour line having a second radius of curvature. The first radius of curvature may be greater than the second radius of curvature.

[0025] According to one embodiment, a hair cutting device component is provided. The hair cutting device component includes a base and a row of teeth. The teeth extend from the base. The row of teeth extends in a first direction. Each tooth has a central plane perpendicular to the first direction. Some or all of the teeth have, on the outer surface exposed during use, a first surface, a second surface, and a transition surface between the first surface and the second surface.

[0026] The first surface has a first surface contour line having a first radius of curvature. The second surface has a second surface contour line having a second radius of curvature. The first radius of curvature may be greater than the second radius of curvature.

[0027] Alternatively, or in addition to the above, the transition surface may have a third surface contour having a third radius of curvature which may be smaller than the first and / or second radii of curvature.

[0028] Various effects are achieved. A good excision effect is obtained while reducing the risk of skin damage. The comb can reduce the risk of skin damage in the axillary and / or genital areas, even when used with a cutting unit designed for use on facial skin.

[0029] These and other advantages will become apparent from the following description, which refers to the drawings and possible examples. [Brief explanation of the drawing]

[0030] [Figure 1] This is a diagram of a hair cutting kit. [Figure 2] This is a perspective view of the comb in a hair cutting kit. [Figure 3] Another perspective of the comb. [Figure 4] This is a plan view showing the comb teeth and cutting blade. [Figure 5] This is a detailed view of the comb. [Figure 6] This is a perspective view of the comb teeth. [Figure 7] This is a perspective view of the comb teeth. [Figure 8] This is a perspective view of the comb teeth. [Figure 9] This is a plan view showing the comb teeth and cutting blade. [Figure 10] This is a partial cross-sectional view of a hair cutting kit with the comb assembled into the cutting unit. [Figure 11]This is a diagram of comb teeth. [Figure 12] This is a cross-sectional view of the comb teeth. [Figure 13] This is a cross-sectional view of the comb teeth. [Figure 14] This is a cross-sectional view of the comb teeth. [Figure 15] This is a cross-sectional view of the comb teeth. [Figure 16] This is a cross-sectional view of the comb teeth of a hair cutting kit comb. [Figure 17] Another cross-sectional view of the comb teeth of the hair cutting kit comb. [Figure 18] This diagram schematically illustrates the operation of a hair cutting kit according to one embodiment. [Figure 19] This diagram schematically illustrates the operation of a hair cutting kit according to one embodiment. [Figure 20] This diagram schematically illustrates the operation of a hair cutting kit according to one embodiment. [Figure 21] This diagram schematically illustrates the operation of a hair cutting kit according to one embodiment. [Figure 22] This diagram schematically illustrates the operation of a hair cutting kit according to one embodiment. [Figure 23] This diagram schematically illustrates the operation of a hair cutting kit according to one embodiment. [Figure 24] This diagram schematically illustrates the operation of a hair cutting kit according to one embodiment. [Figure 25] This is a block diagram of the handle of a hair cutting kit. [Modes for carrying out the invention]

[0031] The embodiments are described with reference to drawings that specify features or elements that are similar or identical in construction, operation, and / or function, where similar or identical reference numbers indicate similar or identical features or elements.

[0032] The embodiment relates to a hair cutting kit. The hair cutting kit may comprise a handle, a cutting unit which may be a trimmer head or comprise a trimmer head, and a comb. The comb is configured to ensure a good cutting effect while reducing the risk of significant skin bumps that may lead to skin damage.

[0033] Before describing the kits and devices shown in Figures 1 to 25, we will describe different embodiments in more detail. These embodiments disclose further features, advantages, and potential uses that can be combined in any useful combination.

[0034] As used herein, the term “first direction” refers to the direction in which the teeth are configured and arranged. The first direction may be determined, for example, as the direction of a line connecting the free ends of the outermost comb teeth configured at both ends of the row of comb teeth of a comb. Alternatively, or in addition to this, the first direction may be determined, for example, as the direction of a line interconnecting the tips of the outermost blade teeth configured at both ends of the row of blade teeth of a fixed blade of a cutting unit. Alternatively, or in addition to this, the first direction may be determined, for example, as the direction in which the movable blade of a cutting unit can reciprocate relative to the fixed blade.

[0035] According to one embodiment, the hair cutting kit comprises a handle, a cutting unit, and a comb.

[0036] The cutting unit comprises a fixed blade and a movable blade. The fixed blade comprises a row of first blade teeth having free ends of first blade teeth. The movable blade may be configured to reciprocate relative to the fixed blade (for example, along a first direction).

[0037] The comb is configured to be reversibly releasably assembled to the cutting unit. The comb has a skin surface. The comb comprises a base portion facing the skin surface and a row of comb teeth. The row of comb teeth extends in a first direction, and adjacent comb teeth are separated along the first direction by gaps. Each comb tooth has a central plane that traverses the first direction. Each comb tooth may extend along its central plane.

[0038] Some or all of the comb teeth have an outer surface configured to face away from the fixed and movable blades, a skin surface configured to glide over the user's skin, a supply surface configured to feed hair toward the cutting unit, and a transition surface between the skin surface and the supply surface. The outer surface is the surface that remains exposed during use for contact with the skin and / or for feeding hair toward the cutting unit.

[0039] The skin surface has a first surface contour line having a first radius of curvature. The supply surface has a second surface contour line having a second radius of curvature. The first radius of curvature may be greater than the second radius of curvature.

[0040] This configuration reduces the risk of skin bulging on the skin surface because the curvature of the skin surface is less pronounced than that of the supply surface. The supply surface has a more pronounced curvature than that of the skin surface, allowing the hair to be efficiently guided toward the cutting unit, thus maintaining good cutting efficiency.

[0041] Alternatively, or in addition to the above, the transition surface may have a third surface contour having a third radius of curvature which may be smaller than the first and / or second radii of curvature.

[0042] This structure reduces the risk of the comb teeth pushing the hair downwards towards the skin, and increases the probability that the comb teeth will lift the hair upwards, allowing for efficient cutting. Cutting efficiency is increased.

[0043] The third surface contour line may extend in a plane perpendicular to the plane in which the first and / or second surface contour lines extend. This takes into account that the curve along which the comb mounted on the cutting unit moves during use is related by lifting the hair to guide it toward the cutting unit.

[0044] The first surface contour may extend within a first plane perpendicular to the central plane of the comb teeth. The second surface contour may extend within a second plane perpendicular to the central plane of the comb teeth. The first surface contour may extend within a plane (e.g., perpendicular) that crosses the plane in which the movable blade abuts the fixed blade when the comb is assembled to the cutting unit. This takes into account that the curvature in the plane perpendicular to the central plane of the teeth is relevant to the bulging of the skin and / or guiding the hair toward the cutting unit at the feed surface.

[0045] The first and second contour lines may be arc-shaped segments, such as circular arc segments, or may approximate arc-shaped segments. This can enhance user comfort.

[0046] The first contour line may be flat, meaning the first radius of curvature may be infinite. This reduces the risk of significant skin elevation.

[0047] The first surface contour may be spaced apart from the free ends of the comb teeth. Alternatively, or in addition to this, the first surface contour may be configured on the skin surface in the intermediate region between the free ends of the comb teeth and the transition surface.

[0048] The first radius of curvature may be the radius of curvature of a first cylinder circumscribing the skin surface. Alternatively, or in addition to that, the first radius of curvature may be the radius of curvature of a first cylinder circumscribing the skin surface and tangent to the skin surface at a first intersection where the central plane intersects the skin surface. Alternatively, or in addition to that, the first radius of curvature may be the radius of curvature of a first cylinder circumscribing at least a portion of the skin surface intermediate between the free end of the comb teeth and the transition surface.

[0049] Alternatively, or in addition to the above, the second surface contour line may extend into a plane that is spaced apart from the plane in which the movable blade contacts the fixed blade when the comb is assembled to the cutting unit.

[0050] Alternatively, or in addition to the above, the second surface contour may extend in a plane parallel to the plane in which the movable blade abuts the fixed blade when the comb is assembled, or it may be a second arc-shaped segment inclined with respect to the plane in which the movable blade abuts the fixed blade, the inclination being around an axis of inclination parallel to the plane in which the movable blade abuts the fixed blade.

[0051] Alternatively, or in addition to the above, the second surface contour may be a second arc-shaped segment on a portion of the comb teeth that is shaped as the surface of the second cylindrical segment or approximates the surface of the second cylindrical segment.

[0052] The second surface contour may be spaced apart from the base portion of the comb. Alternatively, or in addition to this, the second surface contour may be configured on the supply surface in the intermediate region between the base portion of the comb and the transition surface.

[0053] The second radius of curvature may be the radius of curvature of a second cylinder tangent to the supply surface. Alternatively, or in addition to that, the second radius of curvature may be the radius of curvature of a second cylinder tangent to the supply surface and tangent to the supply surface at a second intersection where the central plane intersects the supply surface. Alternatively, or in addition to that, the second radius of curvature may be the radius of curvature of a second cylinder tangent to at least a portion of the supply surface located between the base portion and the transition surface.

[0054] The third surface contour may extend within the central plane of the comb teeth. The third surface contour may also be an arc-shaped segment. The transition surface may not have a border.

[0055] The transition surface may be molded as a spheroidal cap surface, or may be provided as such. This provides a smooth transition between the skin surface and the supply surface without providing sharp edges, thereby improving user comfort.

[0056] The transition surface may be configured and positioned at the leading edge of the comb in the direction of movement when the comb is assembled to the cutting unit. This ensures that the hair can be lifted toward the upright position by the transition surface.

[0057] Each comb tooth may have a J-shape or a hook shape. This configuration allows the comb teeth to partially surround the fixed blade and / or the movable blade from the side of the movable blade, potentially reducing the risk of skin injury.

[0058] When assembled to a cutting unit, the comb may be configured such that each comb tooth extends from a base portion along the movable blade to the free end of the comb tooth, around a line along which the first blade tooth end is positioned.

[0059] The comb may be configured such that, when assembled to the cutting unit, some or all of the free ends of the comb teeth partially overlap with at least some of the first blade teeth when viewed in a line of sight perpendicular to the plane in which the movable blade contacts the fixed blade. The risk of skin injury can be reduced while allowing the blade system of the cutting unit to be positioned close to the skin surface.

[0060] The comb may further include ridges extending laterally with respect to the first direction. The ridges facilitate the comb's gliding along the skin.

[0061] The ridge may be separated from the free end of the comb teeth by an additional gap. This can facilitate skin access to the cutting unit and achieve good cutting efficiency.

[0062] Some, most, or all of the ridges may extend along the central plane of the comb teeth. The number of ridges may be equal to the number of comb teeth. Such a configuration can improve gliding during use.

[0063] The ridges may protrude from the upper surface of the comb. The top of the ridges may have varying heights when measured from the upper surface of the comb. The upper surface may be the main surface of the comb that remains exposed when the comb is assembled to the cutting unit.

[0064] The ridge may slope downward as it approaches the comb teeth. The ridge may have a front end located closest to the comb teeth and a rear end located furthest from the comb teeth. The front end of the ridge may be positioned at a height lower than, or approximately the same as, the skin surface of the comb teeth, as measured from the upper surface of the comb. The front end of the ridge may be positioned at a height lower than the free end of the comb teeth, as measured from the upper surface of the comb. This, or approximately the same height, can improve the comb's glide over the skin.

[0065] Each comb tooth may have a certain comb tooth width. This comb tooth width may be the distance between the two outermost tangent planes to the comb tooth, and the outermost tangent planes are perpendicular to the first direction.

[0066] The first radius of curvature may be greater than the comb tooth width. The first radius of curvature may be at least 1.2 times, at least 1.3 times, at least 1.4 times, or at least 1.5 times the comb tooth width. The risk of significant skin elevation is mitigated by providing a first radius of curvature on the skin surface within this range.

[0067] The second radius of curvature may be smaller than the comb tooth width. The second radius of curvature may be up to 0.95 times, up to 0.90 times, up to 0.85 times, or up to 0.80 times the comb tooth width. This achieves efficient supply of hair to the cutting unit.

[0068] The second radius of curvature may be greater than 0.5 times, greater than 0.6 times, or greater than 0.7 times the comb tooth width. The risk of significant skin elevation is mitigated by providing a first radius of curvature on the skin surface within this range.

[0069] The third radius of curvature may be less than 0.6 times the comb tooth width, less than 0.55 times, less than 0.5 times, less than 0.4 times, or less than 0.3 times. The third radius of curvature may be greater than 0.1 times the comb tooth width, greater than 0.15 times, or greater than 0.2 times. This ensures comfort during use while achieving good efficiency in lifting hair that is initially lying fairly flat against the skin.

[0070] The skin surface may have a first cylindrical segment surface along at least a portion thereof, the first cylindrical segment surface having a first radius of curvature. Alternatively, or in addition to the above, the skin surface may have a plurality of facets angled with respect to one another, the first cylindrical segment circumscribing the plurality of facets having a first radius of curvature.

[0071] The majority of the skin surface may be formed as a first cylindrical segment surface, and the first cylindrical segment surface has a first radius of curvature.

[0072] The supply surface may have a second cylindrical segment surface along at least a portion thereof, the second cylindrical segment surface having a second radius of curvature. Alternatively, or in addition to the above, the supply surface may have a plurality of facets angled with respect to one another, the second cylindrical segment circumscribing the plurality of facets of the supply surface having a second radius of curvature.

[0073] The majority of the supply surface may be formed as a second cylindrical segment surface, the second cylindrical segment surface having a second radius of curvature.

[0074] The central plane may intersect the skin surface along a first intersection, which may be straight or curved. The central plane may intersect the supply surface along a second intersection, which may be straight or curved. The first intersection may be angled with respect to the second intersection. The angle between the first and second intersections may be less than 90° or less than 80°. The angle between the first and second intersections may be 50° or more, 60° or more, or 70° or more. This ensures comfort during use while achieving good efficiency in lifting hair that is initially lying fairly flat against the skin.

[0075] Each comb tooth may have a recess on the side opposite the skin surface and / or the feed surface. The recess may be configured to face the fixed blade and / or the movable blade. Each comb tooth may have at least two flank surfaces that converge toward the fixed blade and / or the movable blade. This configuration facilitates feeding the hair toward the cutting unit for cutting. As the hair approaches the cutting unit, it is given a flared shape.

[0076] The cross-sectional width of the comb teeth, measured along a first direction in a cross-sectional plane that may be parallel to a first plane passing through the skin surface, may decrease in at least a portion of the comb teeth in the direction away from the skin surface. Another cross-sectional width of the comb teeth, measured along the first direction in a second cross-sectional plane that may be parallel to a second plane passing through the feed surface, may decrease in at least a portion of the comb teeth in the direction away from the feed surface. This configuration facilitates feeding hair toward the cutting unit for cutting. As the hair approaches the cutting unit, it is given a flared shape.

[0077] The skin surface may extend at a distance of at least 0.2 mm, 0.3 mm, at least 0.4 mm, or at least 0.5 mm from the plane on which the movable blade contacts the fixed blade. This can reduce the risk of injury.

[0078] Each comb tooth can be spaced from the fixed blade by a distance that may be 0.3 mm or more, 0.4 mm or more, or 0.5 mm or more. This allows for efficient feeding of hair towards the cutting unit between the comb and the fixed blade.

[0079] The comb tooth pitch, defined as the distance between the central planes of adjacent comb teeth, may be at least 1.4 times, at least 1.5 times, at least 1.6 times, or at least 1.65 times the comb tooth width. The comb tooth pitch, defined as the distance between the central planes of adjacent comb teeth, may be up to 3.0 times, up to 2.75 times, up to 2.5 times, up to 2.25 times, or up to 2.0 times the comb tooth width. This allows for good cutting efficiency.

[0080] The comb tooth gap width, defined as the distance between the midplanes of adjacent comb teeth minus the comb tooth width, may be at least 0.4 times, at least 0.5 times, at least 0.6 times, or at least 0.65 times the comb tooth width. The comb tooth gap width, defined as the distance between the midplanes of adjacent comb teeth minus the comb tooth width, may be up to 2.0 times, up to 1.75 times, up to 1.5 times, up to 1.25 times, or up to 1.0 times the comb tooth width. This allows for good cutting efficiency.

[0081] The base of the comb may have a mechanical interface for reversibly detachable attachment to the cutting unit. This allows the comb to be easily attached to and detached from the cutting unit as needed.

[0082] The comb may be used in conjunction with an electric hair cutting kit for trimming body hair. For illustrative purposes, the comb may also be used in conjunction with a type of device also called a body groomer, which is intended for use on areas of the body other than the head, including areas that are more prone to skin bumps due to the skin characteristics of each area (e.g., the genital area).

[0083] The comb may be made from plastic.

[0084] According to one embodiment, the hair cutting kit comprises a handle, a cutting unit, and a comb.

[0085] The cutting unit is configured to be or can be configured on a handle and includes a fixed blade and a movable blade. The fixed blade comprises a row of first blade teeth having free ends of first blade teeth. The movable blade may be configured to reciprocate relative to the fixed blade.

[0086] The comb is configured to be reversibly releasably assembled to the cutting unit. The comb has a skin surface. The comb comprises a base portion facing the skin surface and a row of comb teeth. The row of comb teeth extends in a first direction. Adjacent comb teeth are separated along the first direction by gaps. Each comb tooth has a central plane that transverses the first direction (e.g., perpendicular). Each comb tooth extends along its central plane.

[0087] Some or all of the comb teeth have an outer surface configured to face away from the fixed and movable blades, a skin surface configured to glide over the user's skin, a supply surface configured to supply hair toward the cutting unit, and a transition surface between the skin surface and the supply surface.

[0088] The surface of the first cylindrical segment circumscribing the skin surface has a first radius of curvature. The surface of the second cylindrical segment circumscribing the supply surface has a second radius of curvature. The first radius of curvature is greater than the second radius of curvature.

[0089] This configuration reduces the risk of skin bulging on the skin surface because the curvature of the skin surface is less pronounced than that of the supply surface. The supply surface has a more pronounced curvature than that of the skin surface, allowing the hair to be efficiently guided toward the cutting unit, thus maintaining good cutting efficiency.

[0090] Alternatively, or in addition to the above, the spherical or elliptical surface circumscribing the transition surface may have a third radius of curvature which may be smaller than the first and / or second radii of curvature.

[0091] This structure reduces the risk of the comb teeth pushing the hair downwards towards the skin, and increases the probability that the comb teeth will lift the hair upwards, allowing for efficient cutting. Cutting efficiency is increased.

[0092] The first central axis of the surface of the first cylindrical segment may extend within the central plane of the comb teeth. The second central axis of the surface of the second cylindrical segment may extend within the central plane of the comb teeth. The third radius of curvature may be the radius of a linear segment on a spherical or elliptical surface that extends within the central plane of the teeth.

[0093] Any additional features and characteristics that may be implemented in the hair cutting kit correspond to any features and characteristics described in relation to other embodiments.

[0094] According to one embodiment, a comb is provided for use with a hair cutting unit. The comb is configured to be reversibly and releasably assembled to the cutting unit. The comb comprises a base portion and a row of comb teeth. The row of comb teeth extends in a first direction. Adjacent comb teeth are separated along the first direction by a gap. Each comb tooth has a central plane that traverses the first direction. Each comb tooth may extend along its central plane.

[0095] Some or all of the comb teeth have an outer surface configured to face away from the fixed and movable blades, a skin surface configured to glide over the user's skin, a supply surface configured to supply hair toward the cutting unit, and a transition surface between the skin surface and the supply surface.

[0096] The skin surface has a first surface contour line having a first radius of curvature, and the supply surface has a second surface contour line having a second radius of curvature.

[0097] The first radius of curvature may be greater than the second radius of curvature.

[0098] Alternatively, or in addition to the above, the transition surface may have a third surface contour having a third radius of curvature which may be smaller than the first and / or second radii of curvature.

[0099] The third surface contour line may extend in a plane perpendicular to the plane in which the first and / or second surface contour lines extend.

[0100] Any additional features and properties that may be implemented in the comb correspond to any features and properties described in relation to the hair cutting kit.

[0101] According to one embodiment, the use of a comb is provided for reducing skin bulges, particularly in the axillary or genital area of ​​the body, when assembled to a hair cutting unit. The use involves reversibly disengaging the comb to the cutting unit. The comb comprises a base portion and a row of comb teeth. The row of comb teeth extends in a first direction, and adjacent comb teeth are separated along the first direction by gaps. Each comb tooth has a central plane that traverses the first direction. Each comb tooth extends along its central plane. Some or all of the comb teeth have an outer surface configured to face away from the fixed and movable blades, a skin surface configured to slide over the user's skin, a supply surface configured to supply hair toward the cutting unit, and a transition surface between the skin surface and the supply surface.

[0102] The skin surface has a first surface contour line having a first radius of curvature, and the supply surface has a second surface contour line having a second radius of curvature. The first radius of curvature may be greater than the second radius of curvature.

[0103] Alternatively, or in addition to the above, the transition surface may have a third surface contour having a third radius of curvature which may be smaller than the first and / or second radii of curvature.

[0104] The third surface contour line may extend in a plane perpendicular to the plane in which the first and / or second surface contour lines extend.

[0105] The first surface contour line may extend within a first plane perpendicular to the central plane of the comb teeth.

[0106] The second surface contour line may extend within a second plane perpendicular to the central plane of the comb teeth.

[0107] The third surface contour line may extend within the central plane of the comb teeth.

[0108] Any additional features and properties that may be realized in the use of the comb correspond to any features and properties described in relation to the hair cutting kit.

[0109] According to one embodiment, a hair cutting device component is provided. The hair cutting device component includes a base and a row of teeth. The teeth extend from the base. The row of teeth extends in a first direction. Each tooth has a central plane perpendicular to the first direction. Some or all of the teeth have, on the outer surface exposed during use, a first surface, a second surface, and a transition surface between the first surface and the second surface.

[0110] The first surface has a first surface contour line having a first radius of curvature. The second surface has a second surface contour line having a second radius of curvature. The first radius of curvature may be greater than the second radius of curvature.

[0111] Alternatively, or in addition to the above, the transition surface may have a third surface contour having a third radius of curvature which may be smaller than the first and / or second radii of curvature.

[0112] The third surface contour line may extend in a plane perpendicular to the plane in which the first and / or second surface contour lines extend.

[0113] The first surface may be positioned to come into contact with the user's skin.

[0114] The second surface may be configured to guide hairs protruding from the user's skin.

[0115] The transition surface may be shaped to provide a smooth transition to both the skin surface and the supply surface.

[0116] The first surface contour line may extend within a first plane perpendicular to the midplane of the tooth.

[0117] The first surface contour line may be a first arc-shaped segment.

[0118] The first arc-shaped segment may also be a first circular arc-shaped segment.

[0119] The second surface contour line may extend within a second plane perpendicular to the midplane of the tooth.

[0120] The second surface contour line may be a second arc-shaped segment.

[0121] The second arc-shaped segment may also be a second circular arc-shaped segment.

[0122] The third surface contour line may be an arc-shaped segment.

[0123] The transition surface may be formed as a spheroidal cap surface, or may include one.

[0124] The transition surface may be configured and positioned at the leading edge of the cutting device component in the direction of movement.

[0125] The cutting device component may further include ridges extending laterally with respect to the first direction.

[0126] The ridge may be separated from the free end of the comb teeth by a further gap.

[0127] Some, most, or all of the ridges may extend along the midplane of the tooth.

[0128] The number of ridges may be equal to the number of teeth.

[0129] The ridge may protrude from the upper surface of the base.

[0130] The top of the ridge may have varying heights when measured from the upper surface of the comb. The upper surface may be the main surface of the cutting device component that remains exposed during use.

[0131] The ridge may slope downward as it approaches the tooth.

[0132] The ridge may have an anterior end that is positioned closest to the tooth and a posterior end that is positioned furthest from the tooth.

[0133] The anterior end of the ridge may be positioned at a height lower than, or approximately the same as, the first surface of the tooth, as measured from the upper surface of the base.

[0134] The front end of the ridge may be configured and positioned at a height lower than, or approximately the same as, the free end of the comb teeth, as measured from the upper surface of the base.

[0135] Each tooth may have a certain width.

[0136] The tooth width may be the distance between the two outermost tangent planes to the tooth, and these outermost tangent planes are perpendicular to the first direction.

[0137] The first radius of curvature may be greater than the tooth width.

[0138] The first radius of curvature may be at least 1.2 times, at least 1.3 times, at least 1.4 times, or at least 1.5 times the tooth width.

[0139] The second radius of curvature may be smaller than the tooth width.

[0140] The second radius of curvature may be up to 0.95 times, up to 0.90 times, up to 0.85 times, or up to 0.80 times the tooth width.

[0141] The second radius of curvature may be greater than 0.5 times the tooth width, greater than 0.6 times, or greater than 0.7 times.

[0142] The third radius of curvature may be less than 0.6 times the tooth width, less than 0.55 times, less than 0.5 times, less than 0.4 times, or less than 0.3 times.

[0143] The third radius of curvature may be greater than 0.1 times the tooth width, greater than 0.15 times, or greater than 0.2 times.

[0144] The first surface may have a first cylindrical segment surface along at least a portion thereof, the first cylindrical segment surface having a first radius of curvature.

[0145] The majority of the first surface may be formed as a first cylindrical segment surface, and the first cylindrical segment surface has a first radius of curvature.

[0146] The second surface may have a second cylindrical segment surface along at least a portion thereof, the second cylindrical segment surface having a second radius of curvature.

[0147] The majority of the second surface may be formed as a second cylindrical segment surface, the second cylindrical segment surface having a second radius of curvature.

[0148] The central plane may intersect the first surface along the first intersection line, and the first intersection line may be straight or curved.

[0149] The central plane may intersect the second surface along the second intersection line, and the second intersection line may be straight or curved.

[0150] The first intersection line may be angled with respect to the second intersection line.

[0151] The tooth pitch, defined as the distance between the midplanes of adjacent teeth, may be at least 1.4 times, at least 1.5 times, at least 1.6 times, or at least 1.65 times the tooth width.

[0152] The tooth pitch, defined as the distance between the midplanes of adjacent teeth, may be up to 3.0 times, up to 2.75 times, up to 2.5 times, up to 2.25 times, or up to 2.0 times the tooth width.

[0153] The interdental space width, defined as the distance between the midplanes of adjacent teeth minus the tooth width, may be at least 0.4 times, at least 0.5 times, at least 0.6 times, or at least 0.65 times the tooth width.

[0154] The interdental space width, defined as the distance between the midplanes of adjacent teeth minus the tooth width, may be up to 2.0 times, up to 1.75 times, up to 1.5 times, up to 1.25 times, or up to 1.0 times the tooth width.

[0155] The base of the device may have a mechanical interface for reversibly detachable mounting to a cutting unit.

[0156] The hair cutting device components may be combs, blades, or other components for release or permanent assembly onto the hair cutting device.

[0157] The cutting unit components may have a mechanical interface for reversibly detachable mounting to the trimmer head.

[0158] Figure 1 is a diagram of a hair cutting kit 10. The hair cutting kit 10 comprises a handle 20, a cutting unit 30 which may be formed as a trimmer head or which may be composed of a trimmer head, and a comb 60. Although only one comb 60 is shown in Figure 1, the hair cutting kit may comprise two, three, or four or more different combs, at least some of which are configured to engage with the cutting unit 30.

[0159] The cutting unit 30 comprises a blade system including a fixed blade and a movable blade. The cutting unit 30 may be fixedly integrated with the handle 20, or it may be configured to be reversibly detachably attached to the handle 20. The cutting unit 30 may be configured to repeatedly engage with and disengage from the handle 20 in a non-destructive manner. As will be described in more detail below, the cutting unit 30 comprises at least one fixed blade having at least one row of blade teeth, and at least one movable blade.

[0160] The comb 60 has a mechanical interface that allows the comb 60 to selectively engage with the cutting unit 30 in a manner that does not cause damage. The comb 60 has comb teeth that are shaped to reduce the risk of significant skin bumps while ensuring good user comfort and good cutting efficiency.

[0161] The handle 20 may include a control element 21 operably coupled to the motor control unit of the handle 20. In response to the operation of the control element 21, a motor integrated within the housing of the handle 20 can be powered on or off. The output shaft of the motor drives the movable blade of the cutting unit via a rotation-to-linear motion conversion mechanism, causing the movable blade to vibrate in a reciprocating manner.

[0162] The handle 20 may be equipped with an adjustment mechanism ( schematically shown as adjustment mechanism 27 in Figure 25) for adjusting the trimmer head and / or the comb 60 attached to the handle 20. The adjustment mechanism may allow the comb 60 to be repositioned relative to the trimmer head attached to the handle 20. The adjustment mechanism may include a rotary or linear adjustment mechanism.

[0163] The handle 20 has a first handle end that is away from the user's skin when in use, and a second handle end on the opposite side to which the cutting unit 30 is configured and positioned during use. The longitudinal direction of the handle extends from the first handle end to the second handle end on the opposite side to which one of the trimmer heads is attached during use. As will be described in more detail below, the comb 60 has a row of comb teeth that extends laterally with respect to the longitudinal direction of the handle when the comb 60 is assembled to the cutting unit 30.

[0164] Figure 2 is a perspective view of the comb 60. Figure 3 is another perspective view of the comb 60. Figure 4 is a partial plan view showing the comb 60, the fixed blade 31 of the cutting unit 30, and the movable blade 41 of the cutting unit 30 when the comb 60 is assembled. Figure 5 is a partial perspective view showing the comb teeth 70 of the comb 60. Additional geometric characteristics and features of the comb are described in more detail below with reference to Figures 6 to 24.

[0165] The comb 60 is configured to be reversibly and releasably assembled to the cutting unit 30. The comb 60 includes a base portion 61. The base portion 61 is positioned to face the handle 20 when the comb 60 is assembled to the cutting unit 30. The comb 60 has a skin surface 69, which is exposed when the comb 60 is assembled to the cutting unit 30 and may face upward away from the handle when the comb 60 is assembled to the cutting unit 30. The base portion 61 is positioned to face the skin surface 69. The comb 60 may have a mechanical interface 64 for reversibly and releasably coupling the comb 60 to the handle 20 and / or the cutting unit 30. The mechanical interface may be located on or near the base portion 61 or elsewhere on the comb 60.

[0166] The comb 60 includes a row of comb teeth 70. The row of comb teeth 70 extends in a first direction 101. Adjacent comb teeth 70 are separated along the first direction 101 by a gap 75. Each comb tooth 70 may have a J-shape (also called a hook shape) with a comb tooth free end 74.

[0167] The comb teeth 70 are generally configured to extend from a base portion 61 (where the comb tooth base 76 may be located) along the surface of the movable blade 41 that does not contact the fixed blade 31, and then optionally transition to a portion that may extend around the tips of the blade teeth of the fixed blade 31, to the free end of the comb teeth 74. The free end of the comb teeth 74 may optionally be configured to overlap with at least some portions of the blade teeth of the fixed blade 31.

[0168] Each comb tooth 70 may have a central plane 80. The comb teeth 70 may extend along their central planes 80. The central planes 80 extend perpendicular to a first direction 101 (also referred to herein as the x-direction, which may correspond to the rows of comb teeth of a fixed blade, the direction of extension of the rows of blade teeth, and / or the direction of movement of a movable blade). The central planes of different comb teeth 70 extend parallel to each other at a distance that defines the comb tooth pitch.

[0169] The comb 60 may further comprise a ridge 62 extending laterally with respect to the first direction 101. The ridge 62 may be separated from the free ends 74 of the comb teeth 70 by a further gap 63.

[0170] Some, most, or all of the ridges 62 may extend along the central plane 80 of the comb teeth 70. The number of ridges 62 may be equal to the number of comb teeth 70.

[0171] The ridge 62 may protrude from the upper surface 69 of the comb 60. The top of the ridge 62 may have a varying height when measured from the upper surface 69 of the comb 60. The ridge 62 may slope downward as it approaches the comb teeth 70. The ridge 62 may have a front end that is positioned closest to the comb teeth 70. The front end of the ridge 62 may be configured to be lower than the free end 74 of the comb teeth 70 when measured from the upper surface 69 of the comb 60, or it may be configured to be at approximately the same height as the free end 74 of the comb teeth 70 when measured from the upper surface 69 of the comb 60.

[0172] As seen in the plan view of Figure 4, the fixed blade 31 comprises a first row of first blade teeth 32. When the comb 60 is assembled to the cutting unit, the row of first blade teeth 32 and the row of comb teeth 70 extend in the same first direction 101 (also referred to herein as the x-direction).

[0173] Each first blade tooth 32 may have one or two cutting edges for scissor cutting. The free end 33 of the first blade tooth 32 may be configured and positioned on a line 34 extending along the first direction 101. Each first blade tooth 32 of the fixed blade 31 may have a central longitudinal axis 35 extending across the first direction 101 in the second direction 102 (also referred to herein as the y direction). A third direction 103 perpendicular to the first direction 101 and the second direction 102 is also referred to herein as the z direction. The line of sight in the plan view of Figure 4 is along the z axis, i.e., perpendicular to the first direction 101 and the second direction 102.

[0174] The fixed blade 41 includes a second row of second teeth 42. When the comb 60 is assembled to the cutting unit, the row of second blade teeth 42 and the row of comb teeth 70 extend in the same first direction 101.

[0175] Each second blade tooth 42 may have one or two cutting edges for scissor cutting. The free end 43 of the second blade tooth 42 may be configured and positioned on a line 44 extending along the first direction 101. Each second blade tooth 42 of the movable blade 41 may have a central longitudinal axis 45 extending across the second direction 102 which traverses the first direction 101.

[0176] When the comb 60 is assembled to the cutting unit 30, each comb tooth 70 may extend from the base portion 61 along the movable blade 41 to the free end 74 of the comb tooth. Optionally, each comb tooth 70 may extend around a line 34 along which the first blade tooth end 33 is positioned. The free end 74 of the comb tooth may be configured to partially overlap with a portion of the first blade tooth 41 when viewed in a plan view having a line of sight perpendicular to the first and second directions 101, 102.

[0177] During operation, the hair 11 is guided by the supply surface 72 into the gap between adjacent first blade teeth 33 in order to perform the cutting operation.

[0178] Each comb tooth 70 has an outer surface. The outer surface may be oriented away from the fixed blade 31 and the movable blade 41 when the comb 60 is assembled to the cutting unit 30. The outer surface may remain exposed to contact the skin and / or to feed hair when the comb 60 is assembled to the cutting unit 30. The lateral flank of the comb tooth 70 may be adjacent to the outer surface oriented away from the fixed blade 31 and the movable blade 41. The lateral flank of the comb tooth 70 may extend from the outer surface toward the fixed blade 31 and the movable blade 41.

[0179] Some, most, or all of the comb teeth 70 have an outer surface comprising a skin surface 71 configured to glide over the user's skin 110, a supply surface 72 configured to supply hair toward the cutting unit 30, and a transition surface 73 between the skin surface 71 and the supply surface 72.

[0180] The transition surface 73 may also act to lift the hair for improved cutting performance. The transition surface 73 provides a smooth transition between the skin surface 71 and the comb teeth feeding surface 72.

[0181] The transition surface 73 is configured to be positioned on the leading edge of the comb 60 when the comb 60 is assembled to the cutting unit 30 and the assembled device is moved in the operating direction.

[0182] As is most commonly seen in Figures 5 to 8, the skin surface 71 has a first surface contour line 81 extending within a first plane 86 perpendicular to the central plane 80. The first surface contour line 81 may be an arc-shaped segment or an elliptical arc-shaped segment. The first surface contour line 81 has a first radius of curvature R S It may have the following: The first radius of curvature may be infinite, in which case the first surface contour line 81 is flat and the skin surface 71 has a flat portion for contact with the skin.

[0183] The supply surface 72 has a second surface contour line 82 that extends to a second plane 87 perpendicular to the central plane 80. The second surface contour line 82 may be another arc-shaped segment or another elliptical arc-shaped segment. The second surface contour line 82 has a second radius of curvature R F It may have a first radius of curvature R S The second radius of curvature R F It is larger than that.

[0184] The second plane 87 may be parallel to the xy-plane spanned by the first and second directions 101 and 102, and the first plane 86 may be oblique (e.g., perpendicular) to the xy-plane spanned by the first and second directions 101 and 102. In other embodiments, both the first plane 86 and the second plane 87 are inclined with respect to the xy-plane spanned by the first and second directions 101 and 102 at an angle different from 90°, particularly an angle less than 90°. The first plane 86 and the second plane 87 may not be orthogonal.

[0185] The transition surface 73 has a third surface contour line 83 that extends within the central plane 80. The third surface contour line 83 may be yet another arc segment or yet another elliptical arc segment. The third surface contour line 83 has a third radius of curvature R T and can have.

[0186] The first radius of curvature R S is larger than the second radius of curvature R F . The third radius of curvature R T is smaller than the second radius of curvature R F and smaller than the first radius of curvature R S . Such a configuration reduces the risk of significant skin bulging and the resulting risk of skin damage during operation while achieving good user comfort and incision efficiency.

[0187] The different radii of curvature R S >R F >R T reduce the upward bulging of the skin. The clearly different radii R S >R F >R T of the comb teeth 70 prevent the funnel effect as much as possible, so that the skin no longer bulges so much while maintaining user comfort and without impairing the cutting efficiency in an unacceptable manner. Different geometric conditions may also make it possible to achieve a shorter hair length, but this has an adverse effect on the feel on the skin and / or reduces efficiency.

[0188] Referring to FIGS. 9 and 10, the first radius of curvature R S , the second radius of curvature R F , and / or the third radius of curvature R T can be adapted to the comb tooth width, the size of the comb tooth gap, and / or the comb tooth pitch.

[0189] Each comb tooth 70 has a comb tooth width W. The comb tooth width 70 is the distance between two outermost tangent planes 78 to the comb tooth 70 when the outermost tangent plane 78 is perpendicular to the first direction 101. The comb tooth pitch P can be defined as the distance between the central planes 80 of adjacent comb teeth 70. The comb tooth gap width G may be defined as the difference between the comb tooth pitch P and the comb tooth width W, where G = PW.

[0190] First curvature radius R S The second curvature radius R may be larger than the comb tooth width W, for example, at least 1.2 times, at least 1.3 times, at least 1.4 times, or at least 1.5 times the comb tooth width W. F The second curvature radius R may be smaller than the comb tooth width W, for example, up to 0.95 times, up to 0.90 times, up to 0.85 times, or up to 0.80 times the comb tooth width W. F The comb tooth width W may be greater than 0.5 times, greater than 0.6 times, or greater than 0.7 times. This reduces the risk of significant skin ridges while achieving good feeding efficiency.

[0191] Third radius of curvature R T The third radius of curvature R may be less than 0.6 times the comb tooth width W, less than 0.55 times, less than 0.5 times, less than 0.4 times, or less than 0.3 times. T The comb tooth width W may be greater than 0.1 times, greater than 0.15 times, or greater than 0.2 times. This ensures comfort during use while achieving good efficiency in lifting hair that is initially laid flat against the skin.

[0192] The comb tooth pitch P may be at least 1.4 times, at least 1.5 times, at least 1.6 times, or at least 1.65 times the comb tooth width W. The comb tooth pitch P may be up to 3.0 times, up to 2.75 times, up to 2.5 times, up to 2.25 times, or up to 2.0 times the comb tooth width W. This provides good cutting efficiency while adequately protecting the skin from direct contact with the cutting edges of the fixed blade 31 and / or the movable blade 41.

[0193] The comb tooth gap width, defined as the distance between the midplanes of adjacent comb teeth minus the comb tooth width, may be at least 0.4 times, at least 0.5 times, at least 0.6 times, or at least 0.65 times the comb tooth width.

[0194] The comb tooth gap width G may be up to 2.0 times, 1.75 times, 1.5 times, 1.25 times, or 1.0 times the comb tooth width W. This allows for good cutting efficiency.

[0195] As shown in Figure 10, the skin surface 71 of each comb tooth 70 is at a distance D from the plane 49 on which the movable blade 41 contacts the fixed blade 31. CP It may extend by placing a distance D. CP To reduce the risk of damaging the skin, the thickness may be at least 0.2 mm, 0.3 mm, at least 0.4 mm, or at least 0.5 mm.

[0196] As best seen in Figure 9, each comb tooth 70 is at a distance D from the fixed blade 31. S The distance D can be the distance between them. S The gap between the comb teeth 70 and the fixed blade 31 may be 0.3 mm or more, 0.4 mm or more, or 0.5 mm or more, in order to allow the hair to pass through.

[0197] As shown in Figure 10, the central plane 80 may intersect the skin surface 71 along a first intersection 88 which may be substantially linear. The central plane 80 may intersect the supply surface 72 along a second intersection 89 which may be substantially linear. The first intersection 88 is angled with respect to the second intersection 89. The angle between the first intersection 88 and the second intersection 89 is less than 90° or less than 80°. The angle between the first intersection 88 and the second intersection 89 may be 30° or more, 40° or more, 50° or more, 60° or more, or 70° or more. Both the first intersection 88 and the second intersection 89 may be angled with respect to the plane 49 on which the movable blade 41 contacts the fixed blade 31 when the comb 60 is assembled. Such a transition angle between the skin surface 71 and the supply surface 72 helps to lift the hair and / or achieve supply efficiency in other ways.

[0198] For illustrative purposes, in an exemplary embodiment, the comb tooth width W may be at least 0.7 mm and up to 1.5 mm. This range provides good skin protection and stability when the comb is formed from plastic. The comb tooth gap width G may be 1.5 mm or less, 1 mm or less, for example, about 0.9 mm. The comb tooth pitch P may be greater than 2.0 mm and less than 3 mm. First radius of curvature R S The second radius of curvature R may be 1.0 mm or more. F The third radius of curvature R may be 0.7 mm or more and 1.3 mm or less. T It may be 0.2 mm or more and 0.6 mm or less. Height D of the skin surface 71 above the cutting plane 49 CP The distance between any comb teeth 70 and the fixed blade 31 is D. S It may be 0.2 mm or larger, or 0.3 mm or larger.

[0199] Not only the outer surface of the comb teeth 70 facing away from the blades 31 and 41, but also the inner surface of the comb teeth 70 facing toward the blades 31 and 41 may be designed to enhance cutting efficiency, as described with reference to Figures 11-15.

[0200] As shown in Figures 11 to 15, the comb teeth 70 may have flank surfaces 78 that move closer to each other as they approach the blades 31 and 41 of the cutting unit 30, on their inner surfaces facing the blades 31 and 41 when assembled. Thereafter, one or more recesses 79 may be defined on the inner surface of the comb teeth 70, for example, on the side of the comb teeth 70 that follow the transition surface 73 when the comb 60 moves in the operating direction. Thus, the comb tooth cross-section may show a tapered cross-sectional comb tooth width over at least a portion of the comb teeth 70. The tapering is arranged such that, as seen in the cross-section, the cross-sectional comb tooth width decreases in at least a portion of the comb teeth in the direction along the negative y-axis 102.

[0201] Figures 12 to 15 are cross-sectional views of the comb teeth 70 at the positions indicated by XII-XII (Figure 12), XIII-XIII (Figure 13), XIV-XIV (Figure 14), and XV-XV (Figure 15) in Figure 11.

[0202] As seen in Figures 12 and 13, the cross-sectional comb tooth width decreases from CSW2 to CSW1 or from CSW4 to CSW3 as it approaches the cutting blades 31 and 41, i.e., as it moves away from the supply surface 72, parallel to the second direction 102. The decrease in the cross-sectional comb tooth width does not need to be strictly monotonic, or even monotonic, but it may be beneficial for the cross-sectional comb tooth width (measured between points on opposing flank surfaces spaced apart parallel to the first direction 101) to decrease with increasing distance from the supply surface 72. This creates a recess on the rear side of the comb teeth 70, allowing the bristles 11 to efficiently enter the gap between the fixed blade 31 and / or the movable blade 41.

[0203] As seen in Figures 14 and 15, the cross-sectional comb tooth width decreases from CSW6 to CSW5 or from CSW8 to CSW7 as it approaches the cutting blades 31 and 41, i.e., as it moves away from the skin surface 71, parallel to the second direction 102. Such a decrease in cross-sectional comb tooth width does not need to be strictly monotonic, or even monotonic, but it may be beneficial for the cross-sectional comb tooth width (measured between points on opposing flank surfaces spaced apart parallel to the first direction 101) to decrease with increasing distance from the skin surface 71. This creates a recess on the rear side of the comb teeth 70, allowing the hairs 11 to efficiently enter the gap between the fixed blade 31 and / or the movable blade 41.

[0204] On the one hand, the cross-sectional planes of Figures 12 and 13, and on the other hand, the cross-sectional planes of Figures 14 and 15, may be inclined relative to each other by an angle other than 90°. On the one hand, the cross-sectional planes of Figures 12 and 13, and on the other hand, the cross-sectional planes of Figures 14 and 15, may be angled relative to each other by an angle corresponding to the angle between the first intersection line 88 and the second intersection line 89.

[0205] Referring to Figures 2 to 15, we have described a device in which the skin surface 71, the supply surface 72, and the transition surface 73 are formed as generally smooth surfaces; however, one, some, or all of the skin surface, the supply surface, and / or the transition surface may exhibit orientation discontinuities.

[0206] For illustrative purposes, one, some, or all of the skin surface, supply surface, and / or transition surface may exhibit a faceted surface(s) with flat facets, where adjacent facets are slightly angled relative to one another. Such oriented discontinuities may result from manufacturing defects, may be intentionally introduced (e.g., to facilitate manufacturing), and / or from the properties of the material used in the comb.

[0207] The concepts disclosed herein remain applicable when one, some, or all of the skin surface, supply surface, and / or transition surface exhibit orientation discontinuities, as illustrated with reference to Figures 16 and 17.

[0208] Figure 16 is a cross-sectional view of the comb teeth 170. The comb 60 may have one or more comb teeth 170 as described above. The comb teeth 170 have a skin surface 171. The skin surface 171 includes a plurality of facets 171a to 171e. Each of the facets 171a to 171e may be planar or substantially planar. Adjacent facets 171a to 171e may be angled relative to each other.

[0209] The cylindrical segment surface 178 can circumscribe the facets 171a to 171e of the skin surface 171. The cylindrical segment surface 178 circumscribed to the facets 171a to 171e of the skin surface has a first radius of curvature R of the skin surface 171. S The cylindrical segment surface 178 may extend around a cylindrical central axis having a direction perpendicular to the first direction 101, and a row of comb teeth extends along the first direction.

[0210] Alternatively, or in addition to the above, the supply surface may be a faceted surface. Figure 17 is a cross-sectional view of a comb tooth 170. The comb 60 may comprise one or more comb teeth 170 as described above. The comb teeth 170 have a supply surface 172. The supply surface 172 includes a plurality of facets 172a to 172d. Each of the facets 172a to 172d may be planar or substantially planar. Adjacent facets 172a to 172d may be angled relative to each other.

[0211] Another cylindrical segment surface 179 may circumscribe the facets 172a to 172d of the supply surface 172. The other cylindrical segment surface 179 circumscribed to the facets 172a to 172d of the skin surface defines a second radius of curvature of the supply surface 172. The other cylindrical segment surface 179 may extend around another cylindrical central axis having a direction perpendicular to the first direction 101, along which rows of comb teeth extend.

[0212] Therefore, if the skin surface and / or supply surface are not smoothly curved, the first radius of curvature may be determined as the radius of the first cylindrical segment circumscribed around the skin surface, and / or the second radius of curvature may be determined as the radius of the second cylindrical segment circumscribed around the supply surface.

[0213] Similarly, the third radius of curvature of the transition surface may be determined as the radius of a spherical or elliptical cap circumscribing the transition surface. This allows for the determination of the third radius of curvature, for example, when the transition surface is a faceted surface.

[0214] Referring to Figures 18 to 24, the operation of a hair cutting kit with a comb according to one embodiment (Figures 18, 20, and 22) is compared with the operation of a hair cutting kit with a comb according to another embodiment (Figures 19, 21, 23, and 24).

[0215] Referring to Figure 18, in one embodiment, the comb 60 (for example, the first radius of curvature R of the skin surface 71) S , the second radius of curvature R of the supply surface 72 F , and / or a smaller related third radius of curvature R compared to the comb tooth width W T The device has a transition surface 73. This allows the transition surface 73, located at the leading edge of the device in the operating direction 111, to more easily penetrate under the hair 11 that protrudes somewhat from the skin 110, thereby allowing the hair 11 to move upward 112. The upward movement 112 increases the likelihood that the hair 11 will be properly guided toward the cutting unit by the supply surface 72.

[0216] In Figure 19, the comparison comb has a larger radius of curvature R' (compared to, for example, the radius of curvature of the skin surface, the radius of curvature of the feed surface, and / or the comb tooth width). T The comparative comb teeth 130 have a transition surface 133 having a transition surface 133. This increases the risk that the transition surface 133, positioned at the leading edge of the device in the operating movement direction 111, may not be able to easily get under the hair 11 that protrudes somewhat from the skin 110. In the downward movement 113, the hair 11 is more likely to be pressed even closer to the skin 110. The downward movement 113 makes it less likely that the hair 11 will be properly guided toward the cutting unit by the supply surface.

[0217] Referring to Figure 20, in one embodiment, the comb 60 has a third radius of curvature R of the transition surface 73 (for example, T , the second radius of curvature R of the supply surface 72 F , and / or a larger related first radius of curvature R compared to the comb tooth width W S The skin surface 71 has a gentle curve that causes the skin 110 to slightly rise upward by a short distance 115 relative to its original position 114. The slight rise 115 reduces the likelihood of the skin being damaged by the cutting unit.

[0218] In Figure 21, the comparison comb has a smaller radius of curvature R' (compared to, for example, the radius of curvature of the transition surface, the radius of curvature of the supply surface, and / or the comb tooth width). S A comparative comb has teeth 130 having a skin surface 131 having a more aggressive curvature, resulting in a smaller radius of curvature and causing the skin 110 to bulge upward by a greater distance 116 relative to its original position 114. A more pronounced bulge 116 increases the likelihood of the skin being damaged by the cutting unit. This is especially true when a comb with teeth 130 is used in body areas where the skin is thinner and more flexible than facial skin (such as the axillary or genital area).

[0219] Referring to Figure 22, in one embodiment, the comb 60 has an intermediate value (for example, the third radius of curvature R of the transition surface 73) TLarger than the first radius of curvature R of the skin surface S The associated second radius of curvature R is selected as a value smaller than ( ). F It has a supply surface 72 having a certain surface. This compromise results in some skin ridges 118, but allows the hair 11 to be efficiently guided along the supply path 117 toward the blade of the cutting unit.

[0220] In Figure 23, the comparison comb has a small radius of curvature R (compared, for example, to the radius of curvature of the transition surface or to the radius of curvature of the skin surface). F The comparative comb teeth 130 have a supply surface 132 having a smaller radius of curvature, which efficiently guides the hair toward the blades 31, 41 but causes the skin 110 to bulge upward by a greater distance 118 relative to its original position 114. A more pronounced bulge 118 increases the likelihood that the skin will be damaged by the cutting unit. The hair 11 is also guided toward the blades of the cutting unit along the supply path 117.

[0221] In Figure 24, the comparison comb has a larger radius of curvature R” (for example, compared to the radius of curvature of the transition surface or the radius of curvature of the skin surface). F It has a comparative comb tooth 130 with a supply surface 132 having a larger radius of curvature R” F A less aggressive curvature (approaching infinity in the illustrated comparison comb) results in little skin ridge 118, but it also fails to effectively guide the hair 11 toward the blades 31, 41. For illustrative purposes, the hair 11 can be laid flat against the skin along the non-supply path 119. Cutting efficiency is reduced.

[0222] The movable blade 41 of the cutting unit 30 can be driven in various ways. Figure 25 is a schematic block diagram of the handle 20. The handle 20 may have an outer shell that houses a rechargeable battery 23 and a motor 24. The output shaft 25 of the motor 24 is rotated during operation. A drive element 26 may be formed integrally with the output shaft 25 or attached thereto. The drive element 26 may engage with a driven element of the cutting unit to cause the movable blade to reciprocate, for example, vibrate. The handle 20 may have an adjustment mechanism 27 that allows the comb 60 to be repositioned relative to the cutting unit 30 and / or the handle 20. The adjustment mechanism 27 may include a rotatable or sliding actuation element.

[0223] The dimensions and values ​​disclosed herein should not be understood as being strictly limited to the exact numerical values ​​listed. Instead, unless otherwise indicated, each such dimension is intended to mean both the listed value and the functionally equivalent range encompassing that value. For example, a dimension disclosed as "40 mm" is intended to mean "approximately 40 mm."

Claims

1. Hair cutting kit (10), a hair cutting kit in particular for body hair trimming, Handle (20) and A cutting unit (30) comprising a fixed blade (31) and a movable blade (41), wherein the fixed blade (31) comprises a row of first blade teeth (32) having free ends (33) of first blade teeth, and the movable blade (41) is configured to reciprocate relative to the fixed blade (31), The cutting unit (30) is configured to be reversibly removably assembled to the cutting unit (30), and comprises a comb (60) having a skin surface (69), wherein the comb (60) A base portion (61) located on the opposite side of the skin surface (69) and configured to face the handle (20) when the comb (60) is assembled to the cutting unit (30), A row of comb teeth (70), wherein the row of comb teeth (70) extends in a first direction (101), adjacent comb teeth (70) are separated along the first direction (101) by a gap (75), each comb tooth (70) has a central plane (80) that transverses the first direction (101), and each comb tooth (70) extends in a second direction (102) along the central plane (80) of the comb tooth (70), Some or all of the comb teeth (70) are arranged on an outer surface that faces away from the fixed blade (31) and the movable blade (41), A skin surface (71) configured to glide over the user's skin (110), A supply surface (72) configured to supply hair toward the cutting unit (30), The device comprises a transition surface (73) between the skin surface (71) and the supply surface (72), A hair cutting kit (10), wherein the skin surface (71) extends into a first plane (86) perpendicular to the central plane (80) and has a first surface contour line (81) having a first radius of curvature (RS), and the supply surface (72) extends into a second plane (87) perpendicular to the central plane (80) and has a second surface contour line (82) having a second radius of curvature (RF), and both the first plane (86) and the second plane (87) are inclined at an angle of 90° or less with respect to the plane formed by the first direction (101) and the second direction (102), and the first radius of curvature (RS) is greater than the second radius of curvature (RF).

2. The hair cutting kit (10) according to claim 1, wherein the transition surface (73) extends within the central plane (80) and has a third surface contour line (83) having a third radius of curvature (RT) smaller than the second radius of curvature (RF).

3. Hair cutting kit (10), a hair cutting kit in particular for body hair trimming, Handle (20) and A cutting unit (30) comprising a fixed blade (31) and a movable blade (41), wherein the fixed blade (31) comprises a row of first blade teeth (32) having free ends (33) of first blade teeth, and the movable blade (41) is configured to reciprocate relative to the fixed blade (31), The cutting unit (30) is configured to be reversibly removably assembled to the cutting unit (30), and comprises a comb (60) having a skin surface (69), wherein the comb (60) A base portion (61) located on the opposite side of the skin surface (69) and configured to face the handle (20) when the comb (60) is assembled to the cutting unit (30), A row of comb teeth (170), wherein the row of comb teeth (170) extends in a first direction (101), adjacent comb teeth (170) are separated along the first direction (101) by a gap (75), each comb tooth (170) has a central plane (80) that transverses the first direction (101), and each comb tooth (170) extends along the central plane (80) of the comb tooth (170), comprising: Some or all of the comb teeth (170) are arranged on an outer surface that faces away from the fixed blade (31) and the movable blade (41), It is configured to glide over the user's skin (110) and has a skin surface (171) that includes multiple continuous planes, A supply surface (172) configured to supply hair toward the cutting unit (30), The device comprises a transition surface (173) between the skin surface (171) and the supply surface (172), A hair cutting kit (10) wherein the first cylindrical segment surface (178) circumscribing the skin surface (171) has a first radius of curvature (RS), and the second cylindrical segment surface (179) circumscribing the supply surface (172) has a second radius of curvature (RF), and the first radius of curvature (RS) is greater than the second radius of curvature (RF).

4. The hair cutting kit (10) according to claim 3, wherein the spherical or elliptical surface circumscribing the transition surface (173) has a third radius of curvature (RT) smaller than the second radius of curvature (RF).

5. The hair cutting kit (10) according to claim 1 or 3, wherein the transition surface (73, 173) is configured to be positioned on the leading edge of the comb (60) in the operating movement direction (111) when the comb (60) is assembled to the cutting unit (30).

6. The comb (60) is configured such that, when assembled to the cutting unit (30), each comb tooth (70) extends along the central plane (80) from the base portion (61) along the movable blade (41) to the comb tooth free end (74) around the line (34) where the free end (33) of the first blade tooth is positioned, and / or The comb (60) is configured such that, when assembled to the cutting unit (30), when viewed in a line of sight perpendicular to the plane (49) on which the movable blade (41) contacts the fixed blade (31), some or all of the free ends (74) of the comb teeth (70) partially overlap at least some of the first blade teeth (32), and / or The hair cutting kit (10) according to claim 1, wherein the comb (60) further comprises a ridge (62) extending laterally with respect to the first direction (101) and separated from the free ends (74) of the comb teeth (70) by a further gap (63), and optionally, a portion, most, or all of the ridge (62) extends along the central plane (80) of the comb teeth (70).

7. The hair cutting kit (10) according to claim 1, wherein each of the comb teeth (70) has a comb tooth width (W), the comb tooth width (70) being the distance between two outermost tangent planes (78) to the comb teeth (70), and the outermost tangent planes (78) are perpendicular to the first direction (101).

8. The hair cutting kit (10) according to claim 7, wherein the first radius of curvature (RS) is greater than the comb tooth width (W).

9. The hair cutting kit (10) according to claim 7, wherein the second radius of curvature (RF) is smaller than the comb tooth width (W).

10. The hair cutting kit (10) according to claim 7, wherein the second radius of curvature (RF) is greater than 0.5 times the comb tooth width (W).

11. The transition surface (73) extends within the central plane (80) and the second radius of curvature (R F A third radius of curvature (R) smaller than ) T The hair cutting kit (10) according to claim 7, having a third surface contour line (83) having, wherein the third radius of curvature (RT) is less than 0.5 times the comb tooth width (W) and / or greater than 0.1 times the comb tooth width (W).

12. The skin surface (71) includes a plurality of continuous planes, and along at least a portion thereof, a first cylindrical segment surface, the first cylindrical segment surface having the first radius of curvature (RS), and / or The hair cutting kit (10) according to claim 1, wherein the supply surface (72) comprises a second cylindrical segment surface along at least a portion thereof, and the second cylindrical segment surface has the second radius of curvature (RF).

13. The central plane (80) intersects with the skin surface (71) to form a first intersection line (88), and the central plane (80) intersects with the supply surface (72) to form a second intersection line (89). The first intersection line (88) is angled with respect to the second intersection line (89), and optionally the angle between the first intersection line (88) and the second intersection line (89) is less than 90° or less than 80°, and / or The hair cutting kit (10) according to claim 1, wherein the first intersection line (88) and the second intersection line (89) are angled with respect to the plane (49) on which the movable blade (41) contacts the fixed blade (31) when the comb (60) is assembled.

14. Each comb tooth (70) has a recess (79) on the opposite side of the skin surface (71), and / or The cross-sectional width (CSW5, CSW6; CSW7, CSW8) of the comb teeth (70), measured along the first direction (101) in a cross-sectional plane parallel to the first plane (86) passing through the first plane (86) or the skin surface (71), decreases in at least a portion of the comb teeth (70) in the direction away from the skin surface (71), and / or The hair cutting kit (10) according to claim 1, wherein another cross-sectional width (CSW1, CSW2; CSW3, CSW4) of the comb teeth (70), measured along the first direction (101) in the second plane (87) or another cross-sectional plane parallel to the second plane (87) passing through the supply surface (72), decreases in at least a portion of the comb teeth (70) in the direction away from the supply surface (72).

15. The hair cutting kit (10) according to claim 1, wherein the skin surface (71) extends at a distance of at least 0.3 mm or at least 0.5 mm (DCP) from the plane (49) on which the movable blade (41) contacts the fixed blade (31).

16. The hair cutting kit (10) according to claim 1 or 3 further comprises a handle (20) having an electric motor having a motor shaft and a drive element coupled to the motor shaft and operating to drive the movable blade (41), and optionally the handle (20) is equipped with a rechargeable battery.

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