EP3372359B1 - Shaver handle, shaver including such a handle and method of manufacturing the same - Google Patents
Shaver handle, shaver including such a handle and method of manufacturing the same Download PDFInfo
- Publication number
- EP3372359B1 EP3372359B1 EP17160416.8A EP17160416A EP3372359B1 EP 3372359 B1 EP3372359 B1 EP 3372359B1 EP 17160416 A EP17160416 A EP 17160416A EP 3372359 B1 EP3372359 B1 EP 3372359B1
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- EP
- European Patent Office
- Prior art keywords
- handle
- hollow cells
- handle according
- volume
- shaver
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
- B26B21/40—Details or accessories
- B26B21/52—Handles, e.g. tiltable, flexible
- B26B21/522—Ergonomic details, e.g. shape, ribs or rubber parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
- B26B21/40—Details or accessories
- B26B21/52—Handles, e.g. tiltable, flexible
Definitions
- the disclosure relates to shaver handles, shavers including such handles and methods of manufacturing the same.
- Shaver handles are usually compact plastic molded parts, molded as a single part or sometimes molded as several parts which are later assembled.
- WO2006081842 shows an example of a known shaver handle.
- US5784785 shows an example of a hollow razor handle, having a plurality of appertures.
- the apertures on opposite sides of the hollow handle are axially displaced with respect to one another. Accordingly, an aperture faces a rib or solid portion of the opposite side of the handle.
- GB543801 shows another example of a hollow razor handle comprising longitudinal slits which provide a flexibility to absorb human error during use.
- One of the purposes of the present disclosure is to improve the shaver handles of the prior art, in particular with regard to material consumption and economy.
- the present disclosure proposes a handle for a wet shaver according to claim 1.
- the handle has:
- the mechanical structure of the handle body can be highly efficient and may save a lot of material compared to compact handles full of solid material, for the same or similar mechanical properties.
- a further object of the disclosure is a shaver comprising a handle with any of the above described features and a shaver head mounted on the head supporting portion of said handle.
- Still another object of the disclosure is a method for reducing the amount of raw material used in manufacturing a handle for wet shaver comprising defining a cell containing structure using a Voronoi diagram, characterized in that the material volume used to manufacture said handle is at least 33% inferior compared to a handle having a similar bending efficiency ratio.
- Figures 1 and 2 illustrate a shaver 1 according to a first embodiment, comprising a handle 2 and a shaver head 3.
- the shaver head 3 may have a guard 4, one or several blades 5 and possibly a cover 6 or similar.
- the handle 2 may be formed in one piece.
- the handle 2 may be formed by a digital fabrication technology such as three dimensional (3D) printing, also called additive manufacturing.
- Said 3D printing may be chosen in particular among additive manufacturing methods such as material extrusion (e.g. fused deposition modelling etc.), material jetting, VAT photopolymerization (e.g. digital light processing and electron beam melting, stereolithography etc.), sheet lamination, direct energy deposition, powder bed fusion (e.g. laser sintering etc.) and binder jetting.
- a second step may follow, having the part shaped using conventional techniques (e.g. milling).
- the handle may be formed in two or more parts which are later assembled together.
- the handle may be manufactured by injection molding or by any known manufacturing method including additive manufacturing.
- the handle 2 may be formed in one or several materials.
- the handle 2 may be formed in one or several of the following materials: plastic materials, metals, mixtures of synthetic and natural materials including wood and paper, etc.
- the handle 2 may comprise an elongated handle body 7 and a head supporting portion 8 supporting the shaver head 3.
- the shaver head 3 may be removably or non-removably attached to the head supporting portion 8.
- the handle body 7 is adapted to be held in hand by a user.
- the handle body 7 extends between a distal end 9 (opposite the head supporting portion 8) and a proximal end 10 (close to the head portion 8), along a central line C.
- the central line C may be curved.
- the central line C may be included in a sagittal plane P0.
- the shaver head 3 may be connected to the head supporting portion 8 by any known way, for instance pivotally around a pivot axis perpendicular to the sagittal plane P0, or otherwise.
- the shaver head 3 may be pivotally mounted on two lateral arms 12 belonging to the head supporting portion 8 and elastically biased to a rest position by an elastic tongue 13 also belonging to the head supporting portion 8. Any other known way of mounting the shaver head 3 to the head supporting portion 8 would be possible.
- the handle body 7 may have a cell structure formed by juxtaposed hollow cells 16, at least partly separated by solid walls 15.
- the solid walls 15 may form a continuous, single solid part.
- the cell structure has an envelope volume Vt, which is the internal volume comprised by an envelope surface S of the handle 2 as shown in Figure 6 .
- the envelope volume Vt encompasses a certain empty volume Ve.
- the ratio Ve/Vt of said empty volume on said envelope volume being between 33% and 90%, preferably more than 65 %.
- the solid walls 15 may form a network of solid threads or arms which are connected together.
- the cell structure 15, 16 may be formed as any structure, such as for example a Voronoi diagram.
- said cell structure 15, 16 is a grid shell structure.
- Such grid shell structure forms a continuous skin or shell which extends substantially on the envelope surface S of the handle body, thus defining the external shape of the handle body 7 and surrounding an inner volume 14 of the handle body.
- the above mentioned hollow cells 16 are formed in the grid shell structure and are open towards the inner volume 14 and at the envelope surface S, and said solid walls 15 are separating said hollow cells 16 parallel the envelope surface S of the handle body.
- the inner volume 14 is empty and free of solid walls.
- the inner volume 14 may include solid walls belonging to the cell structure and defining hollow cells, for instance according to a 3D Voronoi diagram.
- the handle body may be produced around any object (e.g. an insert made of any known material) entrapping it and/or enabling it to move freely in the handle body 7.
- the grid shell structure 15, 16 may extend continuously around the central line C.
- the grid shell structure 15, 16 may define a top portion 17, a bottom portion 18 and two side portions 19 all extending along the central line from the distal end to the proximal end, and said grid shell structure forms an apex 20 at the distal end 9 of the handle body ( Figures 4-5 ), continuously joining the top portion 17, bottom portion 18 and side portions 19.
- the grid shell structure 15, 16 may be such that said hollow cells 16 represent between 30 % and 60 % of said outside surface.
- the grid shell structure 15, 16 may be such that said hollow cells 16 have an average surface density (parallel to the envelope surface S) comprised between 0.3 and 3 cells / cm 2 .
- the grid shell structure 15, 16 may be such that a plane perpendicular to said central line C and intersecting the handle body 7(for instance the planes P1, P2 shown in Figure 3 ) intersects an average number of hollow cells 16 comprised between 3 and 15.
- the grid shell structure 15, 16 may be such that a plane including said distal end 9 and said proximal end 10 (for instance the sagittal plane P0), intersects an average number of hollow cells 16 comprised between 3 and 20.
- the thickness e of the grid shell structure 15, 16 may be a few millimeters, for instance between 0,3 and 5 mm; the transverse dimension D of the grid shell structure 15, 16, perpendicular to the central line C, may be for instance between about 8 and 25 mm.
- the length of grid shell structure 15, 16 may be for instance of about 90 to 120 mm and the total length of the shaver handle 2 may be for instance between about 110 to 140 mm. These dimensions may be typical for a normal handle and are not deemed to be limitative.
- the handle can also be smaller, for instance with a length in the range of about 30-80 mm, in which case the length of the grid shell structure 15, 16 would be consequently reduced. Additionally the handle may have the grid shell structure 15, 16 only in a portion of its length and not in the whole volume.
- the shaver handle 2 saves a lot of material compared to existing shaver handles, thus also saving weight and energy.
- Table 1 The method used to calculate the values in Table 1 is as follows: A variety of commercially available shaver handles were gathered.
- Vm volume of solid material
- each handle was covered with a plastic film, simulating that the handle has a compact (full of material) shape and similarly the handle was inserted in the volume measuring tube, again full of deionized water. The water volume coming out of the tube was measured, corresponding to the envelope volume (Vt).
- the invention In addition to saving material and minimizing energy footprint of the product, the invention also enables to improve the mechanical efficiency of the material used.
- This bending efficiency ratio Rbe may be possibly obtained from a theoretical analysis, in particular from a finite element analysis which uses a 3d digital model to calculate the bending efficiency ratio by taking as input the force F applied to a distal end 9 of the handle and calculating the displacement d of the distal end 9 of the handle and the volume Vm of solid material of the handle.
- Table 2 shows the comparison of the calculation of the bending efficiency ratio Rbe in the case of the shaver handle of Figures 1-5 compared to a compact shaver handle having the same envelope surface as shown in Figure 6 :
- Handle of Figures 1-5 58,73 2.08 2.57 1.38 10 -4
- Table 2 shows that the mechanical efficiency, measured by the ratio Rbe, is higher in the case of the invention compared to a compact handle of the same external shape.
- the bending efficiency ratio of a handle according to the invention is preferably more than 1.20 10 -4 N.mm -4 , even more preferably larger than 1.30 10 -4 N.mm -4 .
- the invention also provides better gripping for the user, increasing the comfort and the feeling of safety while shaving.
- the handle body 7 may be for instance injection molded and the head supporting portion 8 may be formed as a separate part and fixed to the proximal end 10 of the handle body, for instance by fitting and / or ultrasound welding or by any other way.
- the handle body 7 may include a central empty channel 21, obtained by using a slider in the mold if the handle body is manufactured by injection molding.
- the central channel 21 may be axially open at the proximal end 10 of the central body.
- the central channel 21 may extend along the central line C of the handle, which is curved in the example of Figures 7-8 .
- the central channel 21 and the central line C of the handle may also be straight, as illustrated in the variant of Figure 9 .
- the grid shell structure 15, 16 may have a larger and/or variable thickness compared to the first embodiment, the maximum width of channel 21 being defined by the neck of the handle body 7.
- the handle body 7 may be for instance injection molded on an insert 22 and the head supporting portion 8 may be formed as a separate part and fixed to the handle body 7 and / to the insert 22 at the proximal end 10 of the handle body, for instance by fitting and / or ultrasound welding or by any other way.
- the insert 22 may have a hole 23 at the proximal end 10 of the handle body and the head supporting portion 8 may have a lug 24 fitted into said hole 23.
- the insert 22 may advantageoulsy be hollow, defining the empty inner volume 14.
- the insert 22 may be blow molded.
- the thickness of the insert 22 may typically range from a few tens of millimeters to a few millimeters.
- the material of the insert may be PCTG (Glycol-modified Poly-Cyclohexylenedimethylene Terephthalate), for instance a PCTG with high optical transparency.
- PCTG Gel-modified Poly-Cyclohexylenedimethylene Terephthalate
- the grid shell structure 15, 16 may be injection molded from thermoplastic elastomer (TPE) on the insert 22.
- TPE thermoplastic elastomer
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Description
- The disclosure relates to shaver handles, shavers including such handles and methods of manufacturing the same.
- Shaver handles are usually compact plastic molded parts, molded as a single part or sometimes molded as several parts which are later assembled.
-
WO2006081842 shows an example of a known shaver handle. -
US5784785 shows an example of a hollow razor handle, having a plurality of appertures. The apertures on opposite sides of the hollow handle are axially displaced with respect to one another. Accordingly, an aperture faces a rib or solid portion of the opposite side of the handle. -
GB543801 - One of the purposes of the present disclosure is to improve the shaver handles of the prior art, in particular with regard to material consumption and economy.
- Thus, the present disclosure proposes a handle for a wet shaver according to
claim 1. - The handle, has:
- a handle body adapted to be held by a user; and
- a head supporting portion adapted to support a shaver head having at least one blade,
- Thanks to these features, the mechanical structure of the handle body can be highly efficient and may save a lot of material compared to compact handles full of solid material, for the same or similar mechanical properties.
- Embodiments of such a shaver handle may incorporate one or more of the following features:
- said ratio Ve/Vt is more than 65 %;
- the handle has a bending efficiency ratio Rbe of more than 1.20 10-4 N.mm-4, wherein said bending efficiency ratio is defined as:
- F is a force applied to a distal end of the handle body while the head supporting portion of the handle is fixed, said force being applied substantially perpendicularly to a general direction of the handle,
- d is a resulting displacement of the distal end of the handle,
- Vm is the volume of solid material of the handle;
- said bending efficiency ratio is more than 1.30 10-4 N.mm-4;
- said handle body has an outside surface defining a shape of said handle body and said cell structure includes a grid shell structure forming a skin which continuously extends according to said outside surface and surrounds an inner volume, the grid shell structure forming said hollow cells which are open toward the inner volume and at the outside surface, and said solid walls separating said hollow cells parallel to said outside surface;
- said inner volume is empty and thus deprived of solid walls;
- the handle body extends longitudinally along a central line between a distal end and a proximal end close to the head supporting portion, and said grid shell structure continuously extends around said central line;
- said grid shell structure has a top portion, a bottom portion and two side portions all extending along the central line from the distal end to the proximal end, and said grid shell structure forms an apex at said distal end, continuously joining the top portion, bottom portion and side portions;
- said hollow cells represent between 30 % and 60 % of said outside surface;
- said hollow cells have an average surface density comprised between 0.3 and 3 cells / cm2;
- said hollow cells are disposed such that a plane perpendicular to said central line, intersects an average number of hollow cells comprised between 3 and 15;
- said hollow cells are disposed such that a plane including said distal end and said proximal end, intersects an average number of hollow cells comprised between 3 and 20.
- A further object of the disclosure is a shaver comprising a handle with any of the above described features and a shaver head mounted on the head supporting portion of said handle.
- Still another object of the disclosure is a method for reducing the amount of raw material used in manufacturing a handle for wet shaver comprising defining a cell containing structure using a Voronoi diagram, characterized in that the material volume used to manufacture said handle is at least 33% inferior compared to a handle having a similar bending efficiency ratio.
- The above and other objects and advantages will become apparent from the detailed description of one embodiment of the disclosure, considered in conjunction with the accompanying drawings.
- In the drawings:
-
Figures 1 and 2 are overall perspective views of a shaver according to one embodiment of the disclosure, viewed in two directions, -
Figure 3 is a section view of the shaver ofFigures 1 and 2 , the shaver being cut in the sagittal plane P0 ofFigure 1 , -
Figures 4 and 5 are section views of the handle of the shaver ofFigures 1-3 , respectively cut in planes P1 and P2 ofFigure 3 , -
Figure 6 illustrates the envelope surface of the handle of the shaver shown inFigures 1-5 , -
Figure 7 is a view similar toFigure 1 , for a second embodiment, -
Figure 8 is a section view of the handle body of the shaver ofFigure 7 , the section being taken along plane P0 ofFigure 7 , -
Figure 9 is a section view in a plane perpendicular to plane P0, in a variant of the second embodiment, -
Figure 10 is a view similar toFigure 1 , for a third embodiment, -
Figure 11 is a perspective view of the handle body of the shaver ofFigure 10 , viewed in a direction opposite to that ofFigure 10 , -
Figure 12 is a section view of the handle body of the shaver ofFigure 10 , the section being taken along plane P0 ofFigure 7 . - In the drawings, the same reference numbers denote identical or similar elements. The embodiments and/or examples of the following description which are not covered by the appended claims are considered as not being part of the present invention.
-
Figures 1 and 2 illustrate ashaver 1 according to a first embodiment, comprising ahandle 2 and ashaver head 3. - The
shaver head 3 may have aguard 4, one orseveral blades 5 and possibly acover 6 or similar. - The
handle 2 may be formed in one piece. In that case, thehandle 2 may be formed by a digital fabrication technology such as three dimensional (3D) printing, also called additive manufacturing. Said 3D printing may be chosen in particular among additive manufacturing methods such as material extrusion (e.g. fused deposition modelling etc.), material jetting, VAT photopolymerization (e.g. digital light processing and electron beam melting, stereolithography etc.), sheet lamination, direct energy deposition, powder bed fusion (e.g. laser sintering etc.) and binder jetting. Additionally a second step may follow, having the part shaped using conventional techniques (e.g. milling). - Alternatively, the handle may be formed in two or more parts which are later assembled together. In that case, the handle may be manufactured by injection molding or by any known manufacturing method including additive manufacturing.
- The
handle 2 may be formed in one or several materials. For instance, thehandle 2 may be formed in one or several of the following materials: plastic materials, metals, mixtures of synthetic and natural materials including wood and paper, etc. - The
handle 2 may comprise anelongated handle body 7 and ahead supporting portion 8 supporting theshaver head 3. Theshaver head 3 may be removably or non-removably attached to thehead supporting portion 8. - The
handle body 7 is adapted to be held in hand by a user. Thehandle body 7 extends between a distal end 9 (opposite the head supporting portion 8) and a proximal end 10 (close to the head portion 8), along a central line C. The central line C may be curved. The central line C may be included in a sagittal plane P0. - The
shaver head 3 may be connected to thehead supporting portion 8 by any known way, for instance pivotally around a pivot axis perpendicular to the sagittal plane P0, or otherwise. - In the example shown in the drawings, as can be seen in particular in
Figure 3 , theshaver head 3 may be pivotally mounted on twolateral arms 12 belonging to thehead supporting portion 8 and elastically biased to a rest position by anelastic tongue 13 also belonging to thehead supporting portion 8. Any other known way of mounting theshaver head 3 to thehead supporting portion 8 would be possible. - As shown in
Figures 1-5 , thehandle body 7 may have a cell structure formed by juxtaposedhollow cells 16, at least partly separated bysolid walls 15. Thesolid walls 15 may form a continuous, single solid part. The cell structure has an envelope volume Vt, which is the internal volume comprised by an envelope surface S of thehandle 2 as shown inFigure 6 . - The envelope volume Vt encompasses a certain empty volume Ve.
- The ratio Ve/Vt of said empty volume on said envelope volume being between 33% and 90%, preferably more than 65 %.
- The
solid walls 15 may form a network of solid threads or arms which are connected together. - The
cell structure - In a particularly advantageous embodiment, as shown in
Figures 1-5 , saidcell structure handle body 7 and surrounding aninner volume 14 of the handle body. In that case, the above mentionedhollow cells 16 are formed in the grid shell structure and are open towards theinner volume 14 and at the envelope surface S, and saidsolid walls 15 are separating saidhollow cells 16 parallel the envelope surface S of the handle body. - In the example shown in the drawings, the
inner volume 14 is empty and free of solid walls. In other embodiments, not shown, theinner volume 14 may include solid walls belonging to the cell structure and defining hollow cells, for instance according to a 3D Voronoi diagram. In other embodiments, the handle body may be produced around any object (e.g. an insert made of any known material) entrapping it and/or enabling it to move freely in thehandle body 7. - The
grid shell structure grid shell structure top portion 17, abottom portion 18 and twoside portions 19 all extending along the central line from the distal end to the proximal end, and said grid shell structure forms an apex 20 at thedistal end 9 of the handle body (Figures 4-5 ), continuously joining thetop portion 17,bottom portion 18 andside portions 19. - The
grid shell structure hollow cells 16 represent between 30 % and 60 % of said outside surface. - The
grid shell structure hollow cells 16 have an average surface density (parallel to the envelope surface S) comprised between 0.3 and 3 cells / cm2. - The
grid shell structure Figure 3 ) intersects an average number ofhollow cells 16 comprised between 3 and 15. - The
grid shell structure distal end 9 and said proximal end 10 (for instance the sagittal plane P0), intersects an average number ofhollow cells 16 comprised between 3 and 20. - Typically, the thickness e of the
grid shell structure grid shell structure - The length of
grid shell structure shaver handle 2 may be for instance between about 110 to 140 mm. These dimensions may be typical for a normal handle and are not deemed to be limitative. The handle can also be smaller, for instance with a length in the range of about 30-80 mm, in which case the length of thegrid shell structure grid shell structure - Thanks to the above features, the shaver handle 2 according to the disclosure saves a lot of material compared to existing shaver handles, thus also saving weight and energy. Some comparative examples are shown in Table 1 below.
- The method used to calculate the values in Table 1 is as follows:
A variety of commercially available shaver handles were gathered. - The volume of solid material (Vm) was measured by inserting each handle at a time in a volume measuring tube full of deionized water and measuring the water volume coming out of the tube.
- After this first measurement, each handle was covered with a plastic film, simulating that the handle has a compact (full of material) shape and similarly the handle was inserted in the volume measuring tube, again full of deionized water. The water volume coming out of the tube was measured, corresponding to the envelope volume (Vt).
- Then the empty volume (Ve) was calculated by using the formula: Ve=Vt-Vm.
- Finally the ratio Ve/Vt was calculated.
Table 1 Shaver name Volume of solid material Vm [ml] Enveloppe volume Vt [ml] Ratio empty volume / enveloppe volume Ve/Vt [%] Gillette Mach3 ® 8,30 11,00 24,55 Gillette Body ® 15.90 19,50 18,46 Gillette Flexball ® 16,40 19,80 17,17 Gillette Guard ® 11,80 17,50 32,57 Gillette Venus Swirl ® 23,80 24,10 1,24 King of Shaves Azor SD ® 13,40 17,20 22,09 BIC 3 ®4,30 6,30 31,75 BIC Comfort 3Advance ® 17,40 20,00 13,00 BIC Flex 5 ®12,40 18,45 32,79 BIC Ying Yang ® 13,50 18,85 28,38 Invention - embodiment as shown in the Figures 1-5 4,50 18,20 75,27 - In addition to saving material and minimizing energy footprint of the product, the invention also enables to improve the mechanical efficiency of the material used.
-
- F is a force applied to the
distal end 9 of the handle body while thehead supporting portion 8 of the handle is fixed, said force F being applied substantially perpendicularly to a general direction of the handle (more specifically, this force F may be applied downwards, in the sagittal plane P0 and substantially perpendicular to the central line C at the distal end 9), - d is a resulting displacement of the
distal end 9 of the handle (vertical displacement), - Vm is the volume of solid material of the handle.
- This bending efficiency ratio Rbe may be possibly obtained from a theoretical analysis, in particular from a finite element analysis which uses a 3d digital model to calculate the bending efficiency ratio by taking as input the force F applied to a
distal end 9 of the handle and calculating the displacement d of thedistal end 9 of the handle and the volume Vm of solid material of the handle. - The following table 2 shows the comparison of the calculation of the bending efficiency ratio Rbe in the case of the shaver handle of
Figures 1-5 compared to a compact shaver handle having the same envelope surface as shown inFigure 6 :Table 2 Volume of material Vm [ml] F [N] d [mm] Rbe [N.mm-4] Handle of Figures 1-5 58,73 2.08 2.57 1.38 10-4 Corresponding compact handle 19,537 5 2.61 0.98 10-4 - Table 2 shows that the mechanical efficiency, measured by the ratio Rbe, is higher in the case of the invention compared to a compact handle of the same external shape.
- More generally, the bending efficiency ratio of a handle according to the invention is preferably more than 1.20 10-4 N.mm-4, even more preferably larger than 1.30 10-4 N.mm-4.
- In addition to the above advantages, the invention also provides better gripping for the user, increasing the comfort and the feeling of safety while shaving.
- In the second and third embodiments, described below, the general structure of the handle body and the above advantages are kept, so that these second and third embodiments will not be described again in detail. Mainly the differences over the first embodiment will be explained below.
- In the second embodiment, shown in
Figures 7-8 , thehandle body 7 may be for instance injection molded and thehead supporting portion 8 may be formed as a separate part and fixed to theproximal end 10 of the handle body, for instance by fitting and / or ultrasound welding or by any other way. - The
handle body 7 may include a centralempty channel 21, obtained by using a slider in the mold if the handle body is manufactured by injection molding. Thecentral channel 21 may be axially open at theproximal end 10 of the central body. Thecentral channel 21 may extend along the central line C of the handle, which is curved in the example ofFigures 7-8 . Thecentral channel 21 and the central line C of the handle may also be straight, as illustrated in the variant ofFigure 9 . - In the second embodiment, the
grid shell structure channel 21 being defined by the neck of thehandle body 7. - In the third embodiment, shown in
Figures 10-12 , thehandle body 7 may be for instance injection molded on aninsert 22 and thehead supporting portion 8 may be formed as a separate part and fixed to thehandle body 7 and / to theinsert 22 at theproximal end 10 of the handle body, for instance by fitting and / or ultrasound welding or by any other way. For instance, theinsert 22 may have ahole 23 at theproximal end 10 of the handle body and thehead supporting portion 8 may have a lug 24 fitted into saidhole 23. - The
insert 22 may advantageoulsy be hollow, defining the emptyinner volume 14. For instance, theinsert 22 may be blow molded. The thickness of theinsert 22 may typically range from a few tens of millimeters to a few millimeters. - In one specific example, the material of the insert may be PCTG (Glycol-modified Poly-Cyclohexylenedimethylene Terephthalate), for instance a PCTG with high optical transparency.
- In a particular example, the
grid shell structure insert 22.
Claims (12)
- A handle (2) for a wet shaver, having:- a handle body (7) adapted to be held by a user; and- a head supporting portion (8) adapted to support a shaver head (3) having at least one blade (5),wherein the handle body (7) has a cell structure (15, 16) formed by juxtaposed hollow cells (16) at least partly separated by solid walls (15),
said cell structure (15, 16) having an envelope volume Vt which encompasses a certain empty volume Ve, a ratio Ve/Vt of said empty volume on said envelope volume being between 33% and 90%,
characterized in that said cell structure (15, 16) is formed as a Voronoi diagram. - A handle according to claim 1, wherein said ratio Ve/Vt is more than 65 %.
- A handle according to any of the preceding claims, wherein said handle body (7) has an outside surface defining a shape of said handle body and said cell structure (15, 16) includes a grid shell structure forming a skin which continuously extends according to said outside surface and surrounds an inner volume (14), the grid shell structure forming said hollow cells (16) which are open toward the inner volume (14) and at the outside surface, and said solid walls (15) separating said hollow cells (16) parallel to said ouside surface.
- A handle according to claim 3, wherein said inner volume (14) is empty.
- A handle according to claim 3, wherein said inner volume (14) includes an entrapped insert.
- A handle according to claim 3, wherein said inner volume (14) includes an insert being able to move freely inside the inner volume (14).
- A handle according to any of claims 3-6, wherein the handle body (7) extends longitudinally along a central line (C) between a distal end (9) and a proximal end (10) close to the head supporting portion (8), and said grid shell structure (15, 16) continuously extends around said central line (C).
- A handle according to claim 7, wherein said grid shell structure (15, 16) has a top portion (17), a bottom portion (18) and two side portions (19) all extending along the central line (C) from the distal end (9) to the proximal end (10), and said grid shell structure forms an apex (20) at said distal end, continuously joining said top portion (17), bottom portion (18) and side portions (19).
- A handle according to any of claims 7-8, wherein said hollow cells (16) are disposed such that a plane (P1, P2) perpendicular to said central line (C), intersects an average number of hollow cells (16) comprised between 3 and 15.
- A handle according to any of claims 7-9, wherein said hollow cells are disposed such that a plane (PO) including said distal end (9) and said proximal end (10), intersects an average number of hollow cells (16) comprised between 3 and 20.
- A handle according to any of claims 3-10, wherein said hollow cells (16) represent between 30 % and 60 % of said outside surface.
- A handle according to any of claims 3-11, wherein said hollow cells (16) have an average surface density comprised between 0.3 and 3 cells / cm2.
Priority Applications (17)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17160416.8A EP3372359B1 (en) | 2017-03-10 | 2017-03-10 | Shaver handle, shaver including such a handle and method of manufacturing the same |
PL17160416T PL3372359T3 (en) | 2017-03-10 | 2017-03-10 | Shaver handle, shaver including such a handle and method of manufacturing the same |
BR112019015902-9A BR112019015902B1 (en) | 2017-03-10 | 2018-03-09 | HANDLE FOR A WET SHAVER AND METHOD FOR REDUCING THE AMOUNT OF RAW MATERIALS USED IN MANUFACTURING A HANDLE FOR A WET SHAVER |
US16/492,391 US11850764B2 (en) | 2017-03-10 | 2018-03-09 | Method of manufacturing a shaver |
PL18710838T PL3592514T3 (en) | 2017-03-10 | 2018-03-09 | Shaver handle, shaver including such a handle and method of manufacturing the same |
EP18710838.6A EP3592514B1 (en) | 2017-03-10 | 2018-03-09 | Shaver handle, shaver including such a handle and method of manufacturing the same |
CA3052224A CA3052224A1 (en) | 2017-03-10 | 2018-03-09 | Shaver handle, shaver including such a handle and method of manufacturing the same |
MX2019009376A MX2019009376A (en) | 2017-03-10 | 2018-03-09 | Shaver handle, shaver including such a handle and method of manufacturing the same. |
PCT/EP2018/055929 WO2018162720A1 (en) | 2017-03-10 | 2018-03-09 | Shaver handle, shaver including such a handle and method of manufacturing the same |
PCT/EP2018/055932 WO2018162723A1 (en) | 2017-03-10 | 2018-03-09 | Method of manufacturing a shaver |
RU2019123249A RU2773176C9 (en) | 2017-03-10 | 2018-03-09 | Razor handle, razor containing such a handle, and its manufacturing method |
KR1020197022497A KR102663783B1 (en) | 2017-03-10 | 2018-03-09 | Razor handle, razor comprising such handle, and method of manufacturing the same |
US16/492,357 US20200039099A1 (en) | 2017-03-10 | 2018-03-09 | Shaver handle and method of manufacturing |
JP2019542678A JP2020509795A (en) | 2017-03-10 | 2018-03-09 | Shaver handle, shaver including such handle, and method of manufacturing same |
CN201880009887.7A CN110248780B (en) | 2017-03-10 | 2018-03-09 | Razor handle, razor comprising such a handle and method for manufacturing such a razor handle |
US18/175,428 US20230226708A1 (en) | 2017-03-10 | 2023-02-27 | Shaver handle and method of manufacturing |
US18/515,931 US20240083056A1 (en) | 2017-03-10 | 2023-11-21 | Shaver handle and method of manufacturing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17160416.8A EP3372359B1 (en) | 2017-03-10 | 2017-03-10 | Shaver handle, shaver including such a handle and method of manufacturing the same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3372359A1 EP3372359A1 (en) | 2018-09-12 |
EP3372359B1 true EP3372359B1 (en) | 2020-05-27 |
Family
ID=58266519
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17160416.8A Active EP3372359B1 (en) | 2017-03-10 | 2017-03-10 | Shaver handle, shaver including such a handle and method of manufacturing the same |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3372359B1 (en) |
PL (1) | PL3372359T3 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3904023A1 (en) | 2020-04-30 | 2021-11-03 | Bic Violex S.A. | Skincare device handle with flexible portion |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB543801A (en) * | 1940-09-11 | 1942-03-12 | Joe Edgar Bevis | Improvements in or relating to safety razors |
GB1520834A (en) * | 1976-04-09 | 1978-08-09 | Wilkinson Sword Gmbh | Razors |
DE29709361U1 (en) * | 1997-05-28 | 1997-08-28 | Stange, Dirk, 42275 Wuppertal | Standing wet razor |
US5784785A (en) * | 1997-06-09 | 1998-07-28 | Violex-Bic, S.A. | Folding longitudinal razor |
WO2006081842A1 (en) | 2005-02-03 | 2006-08-10 | Bic Violex Sa | Razor handle having ergonomic gripping areas |
US7779543B2 (en) * | 2006-09-28 | 2010-08-24 | Eveready Battery Company, Inc. | Razor with moveable center of balance |
JP5669473B2 (en) * | 2010-07-27 | 2015-02-12 | 株式会社貝印刃物開発センター | Razor handle |
-
2017
- 2017-03-10 PL PL17160416T patent/PL3372359T3/en unknown
- 2017-03-10 EP EP17160416.8A patent/EP3372359B1/en active Active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
PL3372359T3 (en) | 2020-09-21 |
EP3372359A1 (en) | 2018-09-12 |
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