Patent Description:
Razors are well known everyday items to shave off unwanted bodily hair, e.g. beard hairs. The razor may comprise a razor cartridge including blades configured to cut the hair and a razor handle used attached thereto. In use, a user holds the razor handle and brings the razor cartridge into contact with a portion of skin. By movement of the razor handle the razor cartridge moves in a shaving direction and unwanted hair is removed. The razor cartridge may be releasably connected to the razor handle via a razor connector. A releasable attachment of the razor cartridge may allow exchanging the razor cartridge, for example when the blades have become dull, instead of discarding the entire razor. However, razor connectors typically comprise complex mechanisms requiring multiple components, for example springs, pushers, push buttons, releasing mechanisms etc. The complex mechanisms increase the assembly complexity and increase the production time. Further, the multiple components, especially those that are movable, increase the risk of system failure as they are more prone to breaking.

German Utility Model with Publication Number <CIT> discloses a razor consisting of a handle, at the front end of which there is a razor blade unit on a head with a single or double blade permanently embedded in a plastic housing. The blade unit is arranged interchangeably by means of an openable and closable fork holding element, the fork holder consists of two side arms, which can be pivoted outwards and inwards via guides by means of a sliding element disposed in the head and thereby engaging the razor blade unit in one pivoting position. United States Patent Application Publication Number <CIT> discloses a razor comprising a razor cartridge, with a housing forming a front surface and a rear surface opposite said front surface, said rear surface comprising a pair of distally positioned arc shaped receiving regions and a camming surface, an adapter having a front engagement surface and a rear engagement surface opposite said front engagement surface, said front engagement surface comprising a pair of outwardly facing arc shaped bearings for mating into said pair of arc shaped receiving regions of said razor cartridge, and said rear engagement surface forming a recess and a pair of detents positioned on a wall formed from said adapter, said pair of detents protruding radially inward and a handle, comprising a distal end and a proximal end, said proximal end being shaped to removably engage said recess, said proximal end forming receiving regions to accept said pair of detents formed in said adapter wall.

The present disclosure aims to address the aforementioned issues in optimizing razor connectors.

In a first aspect, the present invention defines a razor connector <NUM> configured to connect a razor cartridge <NUM> to a razor handle <NUM> as recited in claim <NUM>.

In embodiments, the tongue may be a flexible tongue <NUM>.

In embodiments, the at least one interlocking feature may be a recess <NUM>, in particular a recess <NUM> configured to interlock with at least one protrusion of the razor cartridge <NUM>.

In embodiments, the at least one interlocking feature may be an interlocking protrusion, in particular an interlocking protrusion configured to interlock with at least one recess of the razor cartridge <NUM>.

In embodiments, the flap <NUM> may be integrally formed with the interlocking feature.

In embodiments, the flap <NUM> may be integrally formed with the tongue.

In embodiments, the flap <NUM>, the interlocking feature and the tongue may be integrally formed.

In embodiments, the razor connector <NUM> may be a one-piece part.

In embodiments, the razor connector <NUM> may comprise a plurality of layers, in particular a plurality of layers substantially parallel to each other.

In embodiments, the at least one flap <NUM> may be configured to release the at least one interlocking part of the razor cartridge <NUM> from the at least one interlocking feature when actuated.

The at least one flap <NUM> comprises at least one protrusion <NUM>, in particular at least one protrusion <NUM> extending towards the razor cartridge <NUM> when the razor cartridge <NUM> is connected to the razor connector <NUM>.

The at least one protrusion <NUM> is configured to disconnect the razor cartridge <NUM> from the razor connector <NUM> upon actuation of the at least one flap <NUM> by pushing the interlocking part of the razor cartridge <NUM> out of the interlocking feature, in particular wherein the at least one protrusion <NUM> is configured to disconnect the razor cartridge <NUM> from the razor connector <NUM> upon actuation of the at least one flap <NUM> by pushing the razor cartridge's <NUM> protrusion of out of the razor connector's <NUM> recess <NUM>.

In embodiments, the at least one protrusion <NUM> may be configured to preload the razor cartridge <NUM> when the razor cartridge <NUM> is connected to the razor connector <NUM>.

In embodiments, the at least one flap <NUM> may be preloaded when the razor cartridge <NUM> is connected to the razor cartridge <NUM>.

In embodiments, the razor connector <NUM> may comprise two flaps <NUM> opposing one another.

In embodiments, the razor connector <NUM> may comprise a receiving head <NUM> configured to receive a connector sleeve <NUM> of the razor cartridge <NUM>.

In embodiments, the razor connector <NUM> may be integrally formed with the razor handle <NUM>.

In embodiments, the tongue may extend from a distal end of the razor connector <NUM> and wherein the razor connector <NUM> is connected to the razor handle <NUM> at a proximal end and wherein the distal end and proximal end define a proximal-distal razor connector axis <NUM>.

In embodiments, the at least one flap <NUM> may be arranged in proximal direction of the receiving head's <NUM> distal end.

In embodiments, the at least one protrusion <NUM> may be arranged at the distal end of the at least one flap <NUM>.

In embodiments, the at least one flap <NUM> may comprise at least one actuation surface <NUM> configured to be actuated by a user to release the razor cartridge <NUM>.

In embodiments, the at least one actuation surface <NUM> may be disposed substantially parallel to the proximal-distal razor connector axis <NUM>.

In embodiments, the at least one actuation surface <NUM> faces away from the proximal-distal razor connector axis <NUM>.

In embodiments, the at least one actuation surface <NUM> may comprise an indicator, more specifically a haptic indicator and in particular a protrusion, a dot, a cavity, a groove and/or a rubber element.

In embodiments, the at least one flap <NUM> may be moved away from the proximal-distal razor connector axis <NUM> when preloaded.

In embodiments, moving the at least one flap <NUM> towards the proximal-distal razor connector axis <NUM> may disconnect the razor cartridge <NUM> from the razor connector <NUM>.

In embodiments, the razor connector <NUM> may have a top side <NUM> and bottom side <NUM>.

In embodiments, the tongue may comprise a first section extending parallel to the proximal-distal razor connector axis <NUM> along the bottom side of the razor connector <NUM> and a second section diverging towards the top side <NUM> of the razor connector <NUM>.

In embodiments, the tongue may have a polygonal cross-section, more specifically a square, rectangular or octagonal shape and in particular a rectangular shape.

In embodiments, a corner of the polygonal cross-section may be round.

In embodiments, the at least one protrusion <NUM> may be placed at the top side <NUM> of the razor connector <NUM>.

In embodiments, the interlocking feature may be positioned proximally of the receiving head's <NUM> distal end, more specifically on the bottom side of the razor connector <NUM> on the receiving head <NUM> proximally of the receiving head's <NUM> distal end and in particular on the bottom side of the razor connector <NUM> on the receiving head <NUM> proximally of the receiving head's <NUM> distal end adjacent to the tongue.

In embodiments, a layer of the plurality of layers may have a thickness between about <NUM> to about <NUM>, more specifically between about <NUM> to about <NUM> and in particular between about <NUM> to about <NUM>.

In embodiments, the razor connector <NUM> may comprise a first polymer, in particular a photopolymer.

In embodiments, the razor connector <NUM> may comprise a second polymer, in particular an ABS-like polymer and/or polypropylene-like polymer.

In embodiments, the razor connector <NUM> may comprise a third polymer, more specifically a thermoplastic polymer and in particular ABS and/or polypropylene.

In embodiments, the razor connector <NUM> may comprise a fourth polymer, more specifically a thermoplastic elastomer and in particular a TPA, a TPC, a TPO, a TPS, a TPV, a TPZ and/or a TPU.

In embodiments, the at least one flap <NUM> may be connected to the receiving head <NUM> at a connection shoulder <NUM>, wherein the connection shoulder <NUM> comprises the second and/or fourth polymer.

In embodiments, the flexible tongue <NUM> may comprise the second and/or fourth polymer.

In embodiments, the at least one flap <NUM> may comprise the first and/or third polymer.

In embodiments, the at least one protrusion <NUM> may comprise the first and/or third polymer. In embodiments, the tongue may be connected to a spring, more specifically a spring configured to allow the tongue to move along the proximal-distal razor connector axis <NUM> and in particular a spring that compresses and stretches along the proximal-distal razor connector axis <NUM>.

In a second aspect, the present invention defines a razor system comprising a razor connector <NUM> according to any one of claims <NUM> to <NUM> and a razor cartridge <NUM>, wherein the razor cartridge <NUM> is releasably attached to the razor connector <NUM>.

In embodiments, the razor system may further comprise a razor handle <NUM> connected to the razor connector <NUM>.

In a third aspect, the present invention defines a process for manufacturing a razor connector <NUM> according to any one of claims <NUM> to <NUM> comprising additive manufacturing, material jetting, fused filament fabrication, stereolithography and/or selective laser sintering.

Hereinafter, a detailed description will be given of the present disclosure. The terms or words used in the description and the aspects of the present disclosure are not to be construed limitedly as only having common-language or dictionary meanings and should, unless specifically defined otherwise in the following description, be interpreted as having their ordinary technical meaning as established in the relevant technical field. The detailed description will refer to specific embodiments to better illustrate the present disclosure, however, it should be understood that the presented disclosure is not limited to these specific embodiments.

Razor connectors typically comprise multiple components, in particular multiple movable components. The number of components increases the required assembly time during production, as well as the risk of breaking of the razor connector.

Accordingly, in a first aspect, the present invention defines a razor connector <NUM> configured to connect a razor cartridge <NUM> to a razor handle <NUM> as recited in claim <NUM>.

<FIG> illustrates an isometric view of the exemplary razor connector <NUM> according to the present disclosure with the razor handle <NUM>. The razor connector <NUM> may be an individual part and connected to the razor handle <NUM> by a detachable or non-detachable connection, for example a push-in connection. Manufacturing the razor connector <NUM> as an individual part may be advantageous if the razor handle <NUM> can be rapidly and efficiently manufactured, e.g. by injection molding, whereas the razor connector <NUM> can only be manufactured with more cost and time intensive processes, e.g. additive manufacturing. In that case, an individually manufactured razor handle <NUM> and razor connector <NUM> may reduce the manufacturing time and cost of the complete razor. Further, a releasably attached individually formed razor connector <NUM> could be exchanged if it is worn out, while retaining the razor handle <NUM>. Alternatively, the razor connector <NUM> and the razor handle <NUM> may be integrally formed, which may reduce the assembly time even further.

<FIG> is a close-up top side view of the exemplary razor connector <NUM> of <FIG>. <FIG> shows a proximal-distal razor connector axis <NUM> running centrically through the razor connector <NUM>. In embodiments, the tongue <NUM> may extend from a distal end of the razor connector <NUM>. Further, the razor connector <NUM> may be connected to the razor handle <NUM> at a proximal end (not illustrated, see <FIG>). The distal end and proximal end may define the proximal-distal razor connector axis <NUM>. <FIG> further shows two flaps <NUM> of the exemplary razor connector <NUM> being attached to the razor connector <NUM> towards their distal end. In embodiments, the razor connector may comprise one flap <NUM>.

In embodiments, the flap <NUM> may comprise a proximal <NUM> and a distal section <NUM>, wherein upon actuation the distal section <NUM> is configured to move towards the distal end of the razor connector <NUM>. At the proximal section <NUM> of the flaps there is a gap between the flaps and the razor connector <NUM> allowing the proximal section <NUM> of the flaps <NUM> to be pushed towards the proximal-distal razor connector axis <NUM>. The flap's <NUM> distal section <NUM> may move towards the proximal-distal razor connector axis <NUM> when the flap <NUM>, in particular the flap's proximal section <NUM>, is pushed towards the proximal-distal razor connector axis <NUM>. Pushing the flap <NUM>, in particular the flap's proximal section <NUM>, towards the proximal-distal razor connector axis <NUM> may be considered an actuation.

The at least one flap <NUM> may be shell-shaped, e.g. comprise a wall section forming a cavity, in particular an open cavity. The flap <NUM> may be rigid, more specifically the at least one flap may have a Shore D hardness between about <NUM> to about <NUM>, more specifically between about <NUM> to about <NUM> and in particular between about <NUM> to about <NUM>, measured according to ISO <NUM>:<NUM>. Further, the at least one flap <NUM> may have an elongation at break between about <NUM> % to about <NUM> %, more specifically between about <NUM> % to about <NUM> % and in particular between about <NUM> % to about <NUM> %, measured according to ISO <NUM>-<NUM>:<NUM>.

The interlocking protrusion and the recess may interlock through a snap-fit when the razor connector <NUM> is connected to a razor cartridge <NUM> on its distal end. The razor connector <NUM> or parts thereof and/or the razor connector or parts thereof may be flexible, improving the snap fit and allowing release of the snap-fit. When the at least one flap <NUM> is actuated, the distal section(s) may move in distal direction and push the razor cartridge towards the distal end.

In embodiments, the at least one flap <NUM> may be configured to release the at least one interlocking part of the razor cartridge <NUM> from the at least one interlocking feature when actuated. In embodiments, the at least one flap <NUM> may be configured to disconnect the razor cartridge <NUM> from the razor connector <NUM> upon actuation of the at least one flap <NUM> by pushing the interlocking part of the razor cartridge <NUM> out of the interlocking feature, in particular wherein the at least one flap <NUM> is configured to disconnect the razor cartridge <NUM> from the razor connector <NUM> upon actuation of the at least one flap <NUM> by pushing the razor cartridge's <NUM> protrusion of out of the razor connector's <NUM> recess <NUM>. Pushing the interlocking part of the razor cartridge <NUM> out of the interlocking feature of the razor connector <NUM> shall not be construed as requiring the protrusion <NUM> to directly contact the interlocking feature or part. The protrusion may merely push against another part of the razor cartridge <NUM>, whereby the razor cartridge <NUM> moves in distal direction, which in turn may lead to the push out.

As shown in <FIG>, the at least one flap <NUM> comprises at least one protrusion <NUM>. In particular, the at least one flap <NUM> may be integrally formed with at least one protrusion <NUM>. The at least one protrusion <NUM> may improve the disconnection mechanism of the razor connector <NUM>. The at least one protrusion <NUM> extends towards the razor cartridge <NUM> when the razor cartridge <NUM> is connected to the razor connector <NUM>. In embodiments, the at least one protrusion <NUM> may be arranged at the distal section <NUM> of the at least one flap <NUM>. The at least one protrusion <NUM> at the distal section <NUM> of the flap <NUM> may increase the length of movement performed by the flap's <NUM> distal section, which may in turn push the connected razor cartridge <NUM> further away from the razor connector <NUM>. The at least one protrusion <NUM> is configured to disconnect the razor cartridge <NUM> from the razor connector <NUM> upon actuation of the at least one flap <NUM> by pushing the interlocking part of the razor cartridge <NUM> out of the interlocking feature, in particular wherein the at least one protrusion <NUM> is configured to disconnect the razor cartridge <NUM> from the razor connector <NUM> upon actuation of the at least one flap <NUM> by pushing the razor cartridge's <NUM> protrusion of out of the razor connector's <NUM> recess <NUM>.

In embodiments, the at least one flap <NUM> may be moved away from the proximal-distal razor connector axis <NUM> when preloaded. The at least one flap <NUM> moving away from the proximal-distal razor connector axis <NUM> may increase the distance the flap's <NUM> proximal section <NUM> needs to move for the actuation, which may reduce the risk of accidental actuation.

In embodiments, moving the at least one flap <NUM> towards the proximal-distal razor connector axis <NUM> may disconnect the razor cartridge <NUM> from the razor connector <NUM>. In particular, pushing the at least one flap's <NUM> proximal section <NUM> towards the proximal-distal razor connector axis <NUM> may disconnect the razor cartridge <NUM> from the razor connector <NUM>. A disconnected razor cartridge <NUM> is shown in <FIG> and a connected razor cartridge <NUM> is shown in <FIG>.

As depicted in <FIG>, in embodiments, the at least one flap <NUM> may comprise at least one actuation surface <NUM> configured to be actuated by a user to release the razor cartridge <NUM>. The actuation surface <NUM> may facilitate the actuation by the user. The actuation surface <NUM> may be ergonomically shaped and/or comprise a region of higher friction and/or tack e.g. by including a rubber, to improve the handling by the user.

Further, as depicted in <FIG>, in embodiments, the at least one actuation surface <NUM> may be disposed substantially parallel or parallel to the proximal-distal razor connector axis <NUM>. Arranging the at least one actuation surface <NUM> substantially parallel or parallel to the proximal-distal razor connector axis <NUM> may reduce the risk of accidental actuation. For example, if the at least one actuation surface <NUM> were arranged orthogonally to the proximal-distal razor connector axis <NUM>, the actuation surface <NUM> may be actuated accidentally when pressed against the user's skin during the shaving action.

<FIG> further depicts, that in embodiments, the at least one actuation surface <NUM> faces away from the proximal-distal razor connector axis <NUM>. The at least one actuation surface <NUM> faces away from the proximal-distal razor connector axis <NUM> may be easier to actuate by the user, as no other part may block the access.

In embodiments, the razor connector <NUM> may comprise two flaps <NUM> opposing one another. This is shown in for example <FIG>. Arranging two flaps <NUM> opposing one another, may facilitate actuation of the flaps <NUM>, as the force and reaction force of actuation may both be transferred into the flaps <NUM>. Two opposing flaps <NUM> may be easily actuatable by a user's hand, in particular with his thumb and index finger.

As shown in <FIG>, in embodiments, the razor connector <NUM> comprises two actuation surfaces <NUM> facing away from the proximal-distal razor connector axis <NUM> on opposing sides of the proximal-distal razor connector axis <NUM>. Arranging two actuation surfaces <NUM> opposing one another, may facilitate actuation of the flaps <NUM>, as the force and reaction force of actuation may both be transferred into the flaps <NUM>. Two opposing actuation surfaces <NUM> may be easily actuatable by a user with his hands, in particular his thumb and index finger.

The tongue may connect and/or slide into a corresponding feature of the razor cartridge <NUM>, as shown in <FIG>. The tongue may restrict movement of the razor cartridge <NUM> relative to the razor connector <NUM> in certain axis. The tongue may restrict movement of the razor cartridge <NUM> relative to the razor connector <NUM> orthogonally to the proximal-distal razor connector axis <NUM> and/or pivotable movement around the proximal-distal razor connector axis <NUM>. This may improve the connection between the razor connector <NUM> and the razor cartridge <NUM>, in particular it may prevent accidental release of the razor cartridge <NUM>. The tongue may however allow pivotable movement around an axis disposed orthogonally to the proximal-distal razor connector axis <NUM>. This may in use allow the razor cartridge <NUM> to align to the surface of a user's skin. The tongue may allow the razor cartridge <NUM> to align to the user's skin by a pivotable movement but may also apply a restoring force on the razor cartridge <NUM> to return to its original orientation relative to the razor handle.

In embodiments, the tongue may be connected to a spring, more specifically a spring configured to allow the tongue to move along the proximal-distal razor connector axis <NUM> and in particular a spring that compresses and stretches along the proximal-distal razor connector axis <NUM>.

In embodiments, the tongue may be a flexible tongue <NUM>. The term "flexible tongue" within this disclosure may refer to an elongated structure, in particular a structure elongated at least partly along the proximal-distal razor connector axis <NUM>, wherein the elongated structure comprises or consists of an elastic material. The term "flexible tongue" may refer to an elongated structure allowing pivotable movement of a connected part, in particular a razor cartridge" due to elastic deformation. Additionally or alternatively, the term "flexible tongue" may refer to a flexible elongated structure not comprising movable parts, such as springs or slidable parts.

The flexible tongue <NUM> may further reduce the assembly time of the razor connector. Further, the flexible tongue <NUM> may be integrally formed with other parts of the razor connector <NUM>. The term "elastic material" within this disclosure may refer to a material which undergoes deformation when exposed to a force and returns, at least partly, to its original size and shape after the force is removed. Additionally or alternatively, the term "elastic material" within this disclosure may refer to a material which has an elongation at yield of at least <NUM> %, more specifically at least <NUM> % and in particular at least <NUM> %, measured according to ISO <NUM>-<NUM>:<NUM>.

In embodiments, different parts of the razor connector <NUM> may be integrally formed with other parts of the razor connector <NUM>. This may decrease the assembly time of the razor connector <NUM>.

In embodiments, the flap <NUM>, the interlocking feature and the tongue may be integrally formed. In embodiments, the flap <NUM>, the interlocking feature, in particular a recess, and the flexible tongue <NUM> may be integrally formed.

In embodiments, the razor connector <NUM> may be a one-piece part. Manufacturing the razor connector <NUM> may decrease the assembly time of the razor connector <NUM> drastically. In particular, manufacturing the razor connector <NUM> as a one-piece part may lead to no assembly time for the razor connector <NUM> at all. <FIG> show the razor connector <NUM> as a one-piece part.

To manufacture the razor connector <NUM> as a one-piece part different manufacturing technologies may be used. The razor connector <NUM> may be, in some instances, manufacturable by additive manufacturing technologies. The razor connector <NUM> may have a complex geometry, which may be efficiently manufacturable by additive manufacturing. In particular, the razor connector <NUM> may comprise multiple undercuts, which may make for example injection molding inefficient, especially if the razor connector <NUM> is intended to be manufactured as a one-piece part.

In embodiments, the razor connector <NUM> may be formed as a layered structure. The layered structure may comprise a plurality of layers, in particular a plurality of layers substantially parallel to each other. Additive manufacturing technologies, such as fused filament fabrication or material jetting may lead to a plurality of layers, in particular a plurality of layers substantially parallel to each other.

According to this disclosure, the at least one protrusion <NUM> may be configured to preload the razor cartridge <NUM> when the razor cartridge <NUM> is connected to the razor connector <NUM>. Preloading the razor cartridge <NUM> may bias the razor cartridge <NUM> towards an angle relative to the razor handle <NUM>, which may improve the handling of the razor for the user.

In embodiments, the at least one flap <NUM> may be preloaded when the razor cartridge <NUM> is connected to the razor cartridge <NUM>. Preloading the at least one flap <NUM> when connecting the razor cartridge <NUM> may reduce the required force for actuating the at least one flap <NUM> to disconnect the razor cartridge, as at least part of the force is already provided due to the preloading.

As depicted in <FIG> and <FIG>, in embodiments, the razor connector <NUM> may comprise a receiving head <NUM> configured to receive a connector sleeve <NUM> of the razor cartridge <NUM>. The receiving head <NUM> may align the tongue during its insertion into the razor cartridge <NUM>. Further, the receiving head <NUM> may aid in preventing movement of the razor cartridge <NUM> orthogonally to the proximal-distal axis razor connector proximal-distal razor connector axis <NUM>. The razor connector <NUM> may also connect to the razor connector <NUM> in other ways, in particular through other types of plug and socket connection types.

In embodiments, the razor connector <NUM> may be integrally formed with the razor handle <NUM>. Integrally forming the razor connector <NUM> with razor handle <NUM> reduces the assembly time further.

As depicted for example in <FIG>, in embodiments, the at least one flap <NUM> may be arranged in proximal direction of the receiving head's <NUM> distal end. Arranging the at least one flap <NUM> proximally of the receiving head's <NUM> distal end may prevent unintentional interaction of the flap <NUM> with the razor cartridge <NUM>.

In embodiments, the at least one actuation surface <NUM> may comprise an indicator, more specifically a haptic indicator and in particular a protrusion, a dot, a cavity, a groove and/or a rubber element. The haptic indicator may facilitate the identification of the actuation surface <NUM> by the user, in particular without looking at the razor connector <NUM> and only through haptic perception.

In embodiments, the razor connector <NUM> may have a top side <NUM> (shown in <FIG>) and a bottom side <NUM> (shown in <FIG>). The top side <NUM> may be the side facing against a shaving direction and the bottom side <NUM> the side facing towards the shaving direction. Alternatively or additionally, the top <NUM> and bottom <NUM> side may be defined relative to other components. The top <NUM> and bottom side <NUM> may be surfaces disposed parallel to the movement of the at least one flap <NUM> when the flap is actuated. Alternatively or additionally, the bottom side may be the razor connector's <NUM> side comprising the tongue, in particular the flexible tongue <NUM>. Alternatively or additionally, the bottom side may be the razor connector's <NUM> side comprising the interlocking feature. Additionally, the top side <NUM> may be the side opposite of the bottom side <NUM>.

As depicted in <FIG>, <FIG> and <FIG>, in embodiments, the tongue may comprise a first section extending parallel to the proximal-distal razor connector axis <NUM> along the bottom side <NUM> of the razor connector <NUM> and a second section diverging towards the top side <NUM> of the razor connector <NUM>. This configuration may, in instances, be selected to allow the razor cartridge <NUM> to pivot relative to an axis disposed orthogonally to the proximal-distal razor connector axis <NUM>, while preventing movement orthogonally to the proximal-distal razor connector axis <NUM>.

In embodiments, the receiving head <NUM> may comprise a top side <NUM> (shown in <FIG>) and a bottom side <NUM> (shown in <FIG>). The top <NUM> and bottom side <NUM> of the receiving head <NUM> may be defined accordingly to the top <NUM> and bottom side <NUM> of the razor connector <NUM>. As shown in <FIG> the flexible tongue <NUM> may be connected to the receiving head <NUM>, more specifically to the receiving head's <NUM> proximal end and in particular the receiving head's <NUM> bottom side's <NUM> proximal end. This configuration may increase the length of the tongue, which may allow for a greater deflection at the same force compared to a shorter tongue, which may improve the alignment of the razor cartridge <NUM> to the user's skin during the shaving action.

In embodiments, a corner of the polygonal cross-section may be round. The rounded edges may facilitate sliding the tongue into the razor cartridge's <NUM> corresponding feature.

According to this disclosure, the at least one protrusion <NUM> may be placed at the top side <NUM> of the razor connector <NUM>, in particular on the at least one flap's <NUM> distal section <NUM> at the top side <NUM>. In embodiments, the at least one protrusion <NUM> may be placed at the bottom side <NUM> of the razor connector <NUM>, in particular on the at least one flap's <NUM> distal section <NUM> at the bottom side <NUM>. As shown in <FIG>, the at least one flap <NUM> may comprise at least one protrusion <NUM> on the at least one flap's <NUM> distal section <NUM> at both the top side <NUM> and bottom side <NUM>. This configuration may improve the release of the razor cartridge <NUM>. A protrusion <NUM> placed only at the top side <NUM> or bottom side <NUM> may only tilt the razor cartridge <NUM> when the at least one flap <NUM> is actuated. A protrusion at both the top side during the actuation of the at least one flap <NUM> push the razor cartridge <NUM> straight towards the razor connector's <NUM> distal end, which may release the razor cartridge <NUM>. However, it may also be sufficient to place the at least one protrusion <NUM> at only either the top side <NUM> or the bottom side <NUM>. In particular, if the at least one protrusion <NUM> is placed on the side comprising the interlocking feature, in particular the recess <NUM>, the at least one protrusion <NUM> may push the razor cartridge <NUM> so far towards the distal end on that side, that the razor cartridge <NUM> is released from the razor connector <NUM>, although the overall razor cartridge <NUM> only tilts relative to the razor connector <NUM>.

In embodiments, the interlocking feature may be positioned proximally of the receiving head's <NUM> distal end, more specifically on the bottom side of the razor connector <NUM> on the receiving head <NUM> proximally of the receiving head's <NUM> distal end and in particular on the bottom side of the razor connector <NUM> on the receiving head <NUM> proximally of the receiving head's <NUM> distal end adjacent to the tongue. Placing the interlocking feature, in particular a recess <NUM> on the bottom side <NUM> of the razor connector <NUM> may be used e.g. if the bottom side <NUM> of the razor connector <NUM> is facing against the shaving direction, in some instances, as during the shaving action the interlocking feature may be pressed together, due to the forces transferred to the razor cartridge <NUM> during the shaving action.

As mentioned above, in embodiments, the razor connector <NUM> may comprise a plurality of layers, in particular a plurality of layers substantially parallel to each other. In embodiments, a layer of the plurality of layers may have a thickness between about <NUM> to about <NUM>, more specifically between about <NUM> to about <NUM> and in particular between about <NUM> to about <NUM>.

The thickness of the plurality of layers may depend upon the process used for manufacturing. Further, a smaller layer thickness may lead to an increased manufacturing time of the razor connector <NUM>, but may also increase the mechanical stability and dimensional accuracy of the razor connector <NUM>.

In embodiments, the razor connector <NUM> may comprise a first polymer, more specifically a photopolymer and in particular an ABS-like polymer and/or polypropylene-like polymer. A photopolymer and in particular an ABS-like polymer and/or polypropylene-like polymer may be processable by an additive manufacturing process such as stereolithography. The first polymer may have a Shore D hardness between about <NUM> to about <NUM>, more specifically between about <NUM> to about <NUM> and in particular between about <NUM> to about <NUM>, measured according to ISO <NUM>:<NUM>. The first polymer may be for example Durus or Rigur, by the company Stratasys, Ltd.

In embodiments, the razor connector <NUM> may comprise a second polymer. The second polymer may have a Shore A hardness between about <NUM> to about <NUM>, more specifically between about <NUM> to about <NUM> and in particular between about <NUM> to about <NUM>, measured according to ASTM D2240 - <NUM>. The second polymer may be for example Tango or Agilus <NUM>, by the company Stratasys, Ltd.

Thermoplastic elastomers, as well as ABS and/or polypropylene may be processable by technologies wherein a solid material is liquified and subsequently resolidified for manufacturing, for example extrusion. Thermoplastic elastomers, as well as ABS and/or polypropylene may in particular be processable by additive manufacturing technologies such as fused filament fabrication and/or selective laser melting.

Additive manufacturing technologies may also be employed as multi-material processes, wherein a one-piece part comprising at least two different materials can be manufactured. For example, stereolithography and fused filament fabrication may be used to create multi-material parts. In fused filament fabrication the manufacturing device, e.g. the 3D-printer, may comprise multiple nozzles, wherein each nozzle is configured to extrude a different polymer. In stereolithography the part to be produced may change between vats comprising different precursors. Hence, additive manufacturing may be employed to optimize properties of certain parts and/or regions of the razor connector <NUM> by varying the choice of material locally.

The second and/or fourth polymer may have a lower modulus of elasticity compared to the first and/or third polymer. A material with a lower modulus of elasticity exhibits a higher degree of deformation when exposed to the same force compared to a material with a higher modulus of elasticity. The second and/or fourth polymer may have a lower hardness, in particular Shore A and/or Shore D hardness, compared to the first and/or third polymer, which may allow for a higher degree of deformation of the second and/or fourth compared to the first and/or third polymer when exposed to the same force.

In embodiments, the at least one flap <NUM> may be connected to the razor connector <NUM> at at least one connection shoulder <NUM>, as shown in <FIG>. In embodiments, the at least one flap <NUM> may be connected to the receiving head <NUM> at at least one connection shoulder <NUM>. In embodiments, the at least one flap <NUM> may perform a hinge-type movement relative to the razor connector <NUM> in particular a hinge-type movement wherein the connection shoulder <NUM> acts as an axis of rotation. In embodiments, the at least one flap <NUM> may perform a hinge-type movement relative to the receiving head <NUM> in particular a hinge-type movement wherein the connection shoulder <NUM> acts as an axis of rotation. The term "hinge-type movement" within this disclosure is well-known in the art and attributed its common meaning in this technical field. In some embodiments, the term "hinge-type movement" may refer to the at least one flap <NUM> performing a rotational movement relative to the razor connector and/or receiving head <NUM> around the connection shoulder <NUM>. The at least one flap may be connected to the receiving head <NUM> at two connection shoulders <NUM>, wherein one connection shoulder is positioned on the top side <NUM> and/or top side <NUM> of the receiving head <NUM> and wherein one connection shoulder is positioned at the bottom side <NUM> and/or bottom side <NUM> of the receiving head <NUM>. In embodiments, the connection shoulder <NUM> may comprise the second and/or fourth polymer. In embodiments, the connection shoulder <NUM> may comprise the second and/or fourth polymer and the at least one flap <NUM> and/or the receiving head <NUM> comprise the first and/or third polymer. Manufacturing the connection shoulder <NUM> with a material exhibiting lower modulus of elasticity may reduce the required force to actuate the at least one flap <NUM>.

In embodiments, the flexible tongue <NUM> may comprise the first and/or third polymer. In embodiments, the flexible tongue <NUM> may comprise the second and/or fourth polymer. The flexible tongue <NUM> comprising the second and/or fourth polymer, more specifically a second and/or fourth polymer exhibiting a lower modulus of elasticity compared to the first and/or third, may in use allow the razor cartridge <NUM> to align to the skin of the user under less force. However, a flexible tongue <NUM> comprising the first and/or third polymer with a higher modulus of elasticity may provide a higher stability to the razor cartridge <NUM>. In embodiments, the flexible tongue <NUM> may comprise the first and/or third polymer and the second and/or fourth polymer. This may allow adjusting the flexible tongue's <NUM> modulus of elasticity to an optimized value.

In embodiments, the protrusion <NUM> may comprise the first and/or third polymer. The at least one flap <NUM> and/or protrusion <NUM> comprising the first and/or third polymer, more specifically a first and/or third polymer exhibiting a higher modulus of elasticity may lead to a higher rigidity of the parts which may improve the actuation mechanism, in particular the release of the razor cartridge <NUM> upon actuation. A higher rigidity of the at least one flap <NUM> may lead to a higher proportion of the force applied during actuation to be transferred to the protrusion <NUM>, in particular as less force is absorbed by elastic deformation of the flap <NUM>. Similarly, a higher rigidity of the protrusion <NUM> may lead to a higher force transfer to the razor cartridge <NUM>, as less force is absorbed by elastic deformation of the protrusion <NUM>.

In embodiments, the actuation surface may comprise the second and/or fourth polymer. The second and/or fourth polymer may have a higher tack and/or coefficient of friction compared to the second and/or fourth polymer and may therefore provide better grip to the user.

Claim 1:
A razor connector (<NUM>) configured to connect a razor cartridge (<NUM>) to a razor handle (<NUM>) comprising:
a tongue (<NUM>), configured to allow pivotable movement of the razor cartridge (<NUM>) relative to the razor handle (<NUM>);
at least one interlocking feature (<NUM>) configured to interlock with at least one interlocking part of the razor cartridge (<NUM>);
at least one flap (<NUM>) configured to disconnect the razor cartridge (<NUM>) from the razor connector (<NUM>) upon actuation;
wherein the at least one flap (<NUM>) comprises a protrusion (<NUM>); characterised in that the protrusion (<NUM>) is configured to disconnect the razor cartridge (<NUM>) from the razor connector (<NUM>) upon actuation of the at least one flap (<NUM>) by pushing the interlocking part of the razor cartridge (<NUM>) out of the interlocking feature.