This invention relates to razors and razor handles, and in particular, but without limitation to shaving razors and shaving razor handles.
The majority of razors on the market today comprise a handle with an attachment point to which a disposable razor cartridge can be detachably affixed. A user grips the handle to manipulate the razor cartridge and slide it relative to the skin to effect shaving. A conventional razor's handle is normally designed with ergonomics in mind, and thus usually comprises grip portions corresponding to the user's finger positions and high friction components to facilitate gripping the handle when wet.
Shaving razors are available that have been optimised for shaving particular body parts. For example, a generally cylindrical handle that is gripped between the thumb and forefinger of one hand. This type of handle is sometimes considered to be better for shaving a user's face as it can be easily rotated and tilted to obtain the optimum contact angle when shaving the relatively tight curves of a user's face. Conversely, more pad-shaped handles are also available that are considered particularly effective for shaving a user's legs because they afford a large gripping surface. A pad-type configuration affords better control at arm's length, when shaving large areas or when sliding the razor along relatively large distances.
One of the main objectives of shaving is to achieve a close shave, which is best achieved with a sharp blade and when the blade or blades are brought into very close proximity with the skin. These general requirements lead to a risk of cutting the user's skin since the best shaving result is achieved with a very sharp blade brought into almost direct contact with the skin.
To ensure that the blade is kept sharp, many shaving systems make use of disposable razor cartridges which can be detachably affixed to the handle and disposed of when they become blunt. Disposable razor cartridges often comprise a plurality of blades which enable the blades to be set at incrementally closer distances to the user's skin, thereby ensuring a close shave, but reducing the risk of plucking hairs as can happen if the length of the stubble is too long. Moreover, a multi-blade razor cartridge also offers some scope for distributing the pressure applied to the blades over a greater contact area, thereby reducing the risk of cuts and nicks.
Disposable razor cartridges, however, suffer from a number of downsides including being bulky relative to the size of the blades themselves, making it difficult to achieve good control. Moreover, multi-blade razor cartridges, in particular, often require a large contact area with the skin to perform optimally. To alleviate these issues, many disposable razor cartridges are designed to articulate relative to the razor handle so that the cartridge automatically adopts a desired contact angle with respect to the skin and to compensate for incorrect handle angle. Whilst such a setup alleviates some of the problems highlighted above, it can also lead to a general lack of direct control of the razor cartridge and can be clumsy or non-intuitive to use.
This invention aims to address one or more of the above problems and/or to provide an alternative and/or improved razor handle.
According to a first aspect of the invention, there is provided a razor handle comprising a main body portion and a connector for connecting, in use, the main body portion to a razor cartridge, the main body portion comprising first and second spaced-apart finger engaging surfaces adapted, in use, to be engagable with opposite sides of a user's finger and a grip portion interposed between the finger engaging surfaces.
According to a second aspect of the invention, there is provided a razor handle comprising a main body portion and a connector for connecting, in use, the main body portion to a razor cartridge, the main body portion comprising first and second spaced-apart fingertip engaging surfaces adapted, in use, to be engageable with opposite sides of a user's fingertips and a grip portion interposed between the fingertip engaging surfaces.
A third aspect of the invention provides a razor comprising a razor cartridge and a razor handle, the razor cartridge and handle being detachably connectable to one another, wherein the razor handle comprises a main body portion and a connector for connecting, in use, the main body portion to the razor cartridge, the main body portion comprising first and second spaced-apart finger engaging surfaces adapted, in use, to be engagable with opposite sides of a user's finger and a grip portion interposed between the finger engaging surfaces.
A fourth aspect of the invention provides a razor comprising a razor cartridge and a razor handle, the razor cartridge and handle being detachably connectable to one another, wherein the razor handle comprises a main body portion and a connector for connecting, in use, the main body portion to the razor cartridge, the main body portion comprising first and second spaced-apart fingertip engaging surfaces adapted, in use, to be engagable with opposite sides of a user's fingertips and a grip portion interposed between the fingertip engaging surfaces.
The first and second spaced-apart finger engaging surfaces are preferably adapted, in use, to be engageable with opposite sides of a plurality of user's fingers.
The razor cartridge preferably comprises one or more blades having an elongate cutting edge oriented, in use, substantially at right angles to the longitudinal axes of a user's fingers when inserted in, or gripping the handle.
A fifth aspect of the invention provides a razor cartridge for a razor comprising a main body portion having at least two slotted through apertures extending from a front surface thereof to a rear surface thereof, at least one blade located at or towards the front of the cartridge providing two or more cutting edges each cutting edge being aligned with one of the said slotted apertures, and a cover for retaining the blade or blades on the main body portion, wherein the slotted apertures have a cross-section that is wider at or towards the rear of the cartridge than at or towards the front thereof.
One of the main differences between the invention and known razor handles may therefore be that the handle is adapted to grip the user's fingers, rather than the user having to grip the handle. In effect, the razor handle becomes an extension of the user's finger or fingers making it more intuitive and/or natural to use. Moreover, because the handle grips the user's fingers, rather than the user having to grip the handle, this makes the handle particularly useful for users with reduced power or function in their hands, restricted movement or impaired dexterity.
In addition, a conventional razor handle acts as a distance-multiplying/force-reducing lever between the user's hand and the razor cartridge. However, the invention moves the point of interaction between the user's fingers and the razor cartridge much closer together, meaning that a relatively lower force needs to be exerted to achieve a desired blade pressure, which is particularly advantageous for user's with weak hands. In addition, a further effect of bringing the point of interaction between the user's fingers and the razor cartridge closer together is a reduction in distance multiplication, i.e. small movements of the handle do not translate into much larger movements of the razor cartridge. This aspect may be particularly beneficial for users with shaky hands or impaired dexterity.
The first and second finger engaging surfaces are preferably ergonomically shaped to conform to the shape of a user's fingers, and most preferably to the shape of a user's index and second fingers of either hand. By inserting the user's fingers between the finger engaging surfaces, either or both of the finger engaging surfaces can be brought into contact with the fingers to effect gripping thereof.
The grip portion is preferably substantially transverse to at least one of the finger engaging surfaces, i.e. when viewed end-on, the cross-section is substantially I-shaped. The grip portion enables a user to grip the main body portion between the sides or pads of two digits, e.g. the index and second fingers of either hand or the thumb and another finger of either hand.
Accordingly, the razor handle is effectively affixed, in use, to the user's fingers by the finger engaging surfaces gripping opposite sides of one or more fingers, the user gripping the grip portion between two fingers or a thumb and another finger, or any combination of any of the above. In effect, therefore, the razor handle becomes an extension of the user's fingers affording greater control over the position and movement of the razor cartridge. This can be particularly beneficial when shaving body parts at arm's length, e.g. the legs.
Because of the ergonomic shape of the razor handle, it can be used with a variety of hand/finger sizes since one of the finger engaging surfaces is usually only in partial or intermittent contact with the finger.
A first one of the finger engaging surfaces preferably comprises a plurality of finger engaging surface portions. Such a configuration may enable the razor handle to be used in a number of different modes as shall be described in greater detail below. Preferably, at least one of the finger engaging surfaces comprises at least two spaced apart finger engaging surface portions. In a most preferred embodiment of the invention, one of the finger engaging surface portions is located proximally to the connector for the razor cartridge, and most preferably still, substantially above and behind a trailing edge of the razor cartridge. By enabling a user to position the tips of his or her fingers over, on upon, the razor cartridge, a much greater degree of control of the cartridge can be exercised by the finger tips.
A gap or opening in the razor handle is preferably provided adjacent the connector, adjacent the finger engaging surface portion located proximally to the connector, to enable a user's finger or fingers to project beyond a forward periphery of the razor handle to engage the trailing edge of the razor cartridge directly.
Either or both finger engaging surfaces may additionally comprise further finger engaging surface portions at different positions to enable the razor handle to be used in different modes. The plurality of finger engaging surface portions, where provided, may be located, when viewed from the side, at different levels and/or at different distances from the connector.
A resiliently deformable element is preferably disposed on either or both of the finger engaging surfaces and/or on one or both sides of the grip portion. The resiliently deformable element may be adapted, in use, to exert a gripping pressure or force on the user's fingers. The resiliently deformable element, where provided, is preferably manufactured of a high friction material, such as rubber, to facilitate gripping the razor handle when wet or soapy.
The connector preferably comprises relatively moveable engagement projections adapted to engage, in use, complementarily-shaped engagement projections or recesses of the razor cartridge. The engagement projections can be actuatable to move relative to one another by a push button, which could be located anywhere on the razor handle. Most preferably, the push button, where provided, is located on the first finger engaging surface on an opposite side thereof to the finger engaging surface portion, i.e. such that the location of the push button corresponds, in use, to the location of a user's thumb when the first and second digits of a user's hand are inserted between the finger engaging surfaces on opposite sides of the grip portion.
Preferred embodiments of the invention shall now be described, by way of example only, with reference to the accompanying drawings in which:
In
In the following description, directions and orientations referred to (such as up, down, top, front, rear etc.) are internally consistent with the orientation of the handle as shown in the drawings, although it will be appreciated that handle could be rotated about any axis, in which case such references to directions and orientations would need to be interpreted accordingly.
The razor handle of the first embodiment 12 comprises a main body portion having generally planar, central web portion 20 that serves as a grip by which the handle 12 can be gripped, in use, between two digits of a user's hand (not shown). A first edge 22 of the central web portion 20 extends substantially transversely from the centre of a first curved finger engaging surface 24 and a pair of wing portions 26 extend substantially transversely outwardly, in opposite directions, from the opposite edge 28 of the web portion 20.
As is best seen from
The first curved finger engaging surface 24 is symmetrical about the centreline of the web portion 20 and each side has a rearmost edge 34 that slopes downwardly (as shown in the drawing) from the central web 20. The first finger engaging surface 24 extends forwardly from this edge 34 and dips to form first curved recess 36 that is shaped to conform substantially to the shape of the pad of a user's fingertip before rising to form a raised plateau portion 38 that terminates at a forward edge 40 adjacent the razor cartridge 16. In the illustrated embodiment, the height of the plateau portion 38 corresponds to the height of the trailing edge 42 of the razor cartridge 16 for reasons that are explained below.
The wings 26 too are symmetrical about the centreline of the web portion 20 and each wing has a rearmost edge 44 that slopes upwardly (as shown in the drawing) from the central web 20. The wings 26 extend forwardly from their rear edge 44 and are slightly curved, as best seen in
In
The razor handle 12 shown in the drawings can be used in any one of three modes as illustrated schematically in
In
In
In situations where a very close shave is required, or where accurate definition is required, e.g. along the edges of a beard, moustache or sideburns, the user can use the razor handle 12 in “mode 3”, as shown in
In
As is best seen in
The first curved finger engaging surface 24 is symmetrical about the centreline of the web portion 20 and each side has a rearmost edge 34 that slopes downwardly (as shown in the drawing) from the central web 20. The first finger engaging surface 24 extends forwardly from this edge 34 and dips to form first curved recess that is shaped to conform substantially to the shape of the pad of a user's fingertip before rising to form a raised plateau portion 38 that terminates at a forward edge 40 adjacent the razor cartridge 16. In the illustrated embodiment, the height of the plateau portion 38 corresponds to the height of the trailing edge 42 of the razor cartridge 16 for reasons that are explained below. The plateau portion 38 is also provided with a set of transverse ribs 35 formed in the high-friction rubber insert to reduce relative slippage of the razor handle 12 and a user's fingertips, in use.
The wings 26 too are symmetrical about the centreline of the web portion 20 and each wing has a rearmost edge 44 that slopes upwardly (as shown in the drawing) from the central web 20. The wings 26 extend forwardly from their rear edge 44 and are slightly curved, as best seen in
The razor cartridge 16 is connected to the handle 12 by a connector 14 that comprises a male part 15 projecting rearward from the back of the cartridge, which engages a female part 17 projecting forward from the leading edge of the razor handle 12. As can be seen best in
The bifurcated ends 61 of the male part 15 additionally comprises a pair of vertical projections 69 that engage with slots of the female part 15 of the connector 14 to inhibit or prevent relative lateral slippage of the razor cartridge 16 and the handle 12, and to restrict the movement of the cartridge 16 relative to the handle 12. The amount of relative movement permitted can be determined by the appropriate selection of clearances between the various parts of the male and female parts of the connector 14.
The provision of a bifurcated end to one of the connector parts gives rise to two effects: firstly, the cartridge is able to positively snap into engagement with the handle as the splayed tines of the bifurcated end are deformed to fit into the receiving recess of the female part; and secondly, the deformation of the tines allows the cartridge to pivot relative to the handle, but to spring back to a central position when the pivoting force is removed by the action of the tines pressing outwardly on the C-shaped receiving recess.
The main body portion of the razor handle 12 and the main body portion 19 of the cartridge 16 are both manufactured from injection moulded polypropylene, which is a resiliently deformable material. As such, the connection 14 between the handle 12 and cartridge 16 is able to flex in different directions, thus permitting a limited amount of relative movement, in use, between the handle 12 and the cartridge. Such a configuration enables the orientation of the cartridge 16 to conform to the plane of the shaving action, thus ensuring good contact between the blades 21 of the cartridge 16 and the roots of the hairs being shaved.
It will be noted that the construction of the connection between the cartridge 16 and the handle 12 of the second embodiment of the invention is simpler that that shown in relation to the first embodiment. By integrally forming the male and female connector parts from a resiliently deformable material with the main body portions of the handle and cartridge, it is possible to obtain a detachable, articulated interconnection without the need for moving parts, which greatly simplifies the manufacture of the razor 10, reduces the likelihood of failure, and renders the razor easier to use.
Alternative embodiments of the invention, such as that described in relation to
The cartridge 16 of the razor 10 is shown in detail in
As can be seen from
The second embodiment of the razor can be used in any of the three modes described above. The blades 21 of the cartridge 16 are oriented to face in opposite directions such that a user can operate the razor 10 against the grain without having to invert the handle (as shown in
Notably, the overall shape of the main body portion 12 is designed to be ergonomic and intuitive to use, that is, it is designed to be immediately apparent from visual inspection how the handle 12 should be used. Moreover, because the user has greater and more direct control over the position and movement of the razor cartridge, the connector 16 does not necessarily need to provide an articulated connection between the handle 12 and razor cartridge 16, which simplifies its construction.
The handle 12 is preferably manufactured from a durable, lightweight plastics material, such as acrylonitrile-butadiene styrene (ABS), polyethylene (PE), polypropylene (PP), although other materials, including metals, composites etc. may be used to good effect. Advantages of the handle's relative small size and lightweight construction include: that its weight can be reduced compared to a conventional razor handle making it feel “weightless” in use; reduced volume meaning it's easier to store and transport; and a general reduction in material use and/or cost in its manufacture and/or disposal at the end of its life.
The invention is not restricted to the specifics of the foregoing embodiment, which is merely exemplary. For example, the shape, dimensions and configuration of the handle, the mode of connecting the blades/razor cartridge to the handle, the position of the push button, the materials of manufacture, etc., could be changed without departing from the invention.
Number | Date | Country | Kind |
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1115491.1 | Sep 2011 | GB | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/GB2012/052176 | 9/5/2012 | WO | 00 | 6/2/2014 |