Floor cleaning device

Abstract

A floor cleaning device comprising a maneuvering handle, a base portion provided with a cleaning tool, and an articulated joint connecting the maneuvering handle to the base portion and configured to allow reciprocal angular movement. The joint includes an external body comprising an inner cavity and an inner surface delimiting said inner cavity, the inner surface comprising a contact articulation surface extending along a respective ideal spherical surface and a torque-transmitting surface. The coupling further comprises an inner body disposed in the inner cavity of the outer body, and wherein the inner body comprises an outer surface comprising a contact articulation surface, and a torque-transmitting surface contacting the torque-transmitting surface of the outer body to transmit a shunting torque between the inner body and the outer body.

Description

[0001] TITLE

[0002] Floor cleaning device

[0003] DESCRIPTION

[0004] FIELD OF THE INVENTION

[0005] It is an object of the present invention to provide a device for cleaning walkable flat surfaces, such as floors. The floor cleaning device of the present invention includes an articulated joint forming a connection between a maneuvering handle and a base portion of the device to allow angular articulation between the handle and the base portion.

[0006] STATE OF THE ART

[0007] Floor cleaning devices comprising a base portion provided with a floor cleaning tool, a maneuvering handle configured to be gripped by an operator to guide the device, and an articulated joint connecting the base portion to the maneuvering handle are known in the state of the art. The joint is configured to connect the maneuvering handle to the base portion and, at the same time, allow angular articulation between the base portion and the maneuvering handle.

[0008] However, the applicant points out that state-of-the-art joints have flaws and disadvantages that limit the use of the device. In more detail, state of the art articulated joints have excessive bulk, which consequently reduces the space available for other components of the device. Additionally, state-of-the-art articulated joints have angular freedom of articulation between the base portion and the maneuvering handle limited by the geometric characteristics of the joint itself: articulation along a greater angular travel would result in a substantial increase of causing structural damage to the articulated joint. In fact, state-of-the-art articulated joints suffer from long-term reliability problems, especially when the articulated joint is working in extreme angular positions.

[0009] Floor cleaning devices comprising a locking mechanism designed to lock the handle in place relative to the base portion are also known in the state of the art. The state- of-the-art locking mechanisms are accessible by an operator and are exposed to the external environment.

[0010] The applicant points out that state-of-the-art locking mechanisms have flaws and disadvantages that impair their use. First, the state-of-the-art locking mechanisms, being exposed, can generate risks to the operator's safety: there is in fact a risk that such locking mechanisms could injure the operator by, for example, crushing an operator's hand, finger, or foot. Further, the Applicant points out that such locking mechanisms, being exposed and easily accessible from the outside, may malfunction when a foreign body interposes itself in the mechanism. For example, foreign bodies such as dust, dirt, sand, and stones may insert themselves into the locking mechanism, impairing its proper functioning.

[0011] PURPOSE OF THE INVENTION

[0012] Therefore, the purpose of the present invention is to solve at least one of the drawbacks and / or limitations of the previous solutions.

[0013] A first goal is to provide a floor cleaning device that is structurally reliable over time. A further goal is to provide a floor cleaning device comprising a joint, between the base portion and the maneuvering handle, that allows wide angular movement while maintaining high structural reliability.

[0014] A further goal is to provide a floor cleaning device comprising an articulated joint having compact dimensions.

[0015] An additional goal is to provide a floor cleaning device that is easy and convenient for an operator to use.

[0016] An additional goal is to provide a floor cleaning device including a locking mechanism, between the handle and the base portion, that is safe for the operator. An additional goal is to provide a floor cleaning device including a locking mechanism that presents reliable operation over time.

[0017] An additional goal is to provide a floor cleaning device that meets the previous goals and, at the same time, has reasonable manufacturing costs.

[0018] These goals and others, which will appear more from the following description, are substantially achieved by a floor cleaning device in accordance with one or more of the following claims and / or aspects. SUMMARY

[0019] Aspects of the invention are described below.

[0020] In a 1 st aspect there is provided a floor cleaning device (100) comprising:

[0021] - a maneuvering handle (10) configured to be grabbed by an operator to guide said floor cleaning device (100);

[0022] - a base portion (20) provided with at least one floor cleaning tool (22) configured to perform floor cleaning operations;

[0023] - an articulated joint (30) connecting the maneuvering handle (10) to the base portion (20), said articulated joint (30) comprising: o an external body (40) comprising an inner cavity (41 ) and an inner surface (42) bounding said inner cavity (41 ); o an internal body (50) arranged, at least partially, in the inner cavity (41) of the external body (40), said internal body (50) comprising an external surface (51 ) having at least one recessed channel (53), the external body (40) and the internal body (50) being, at least in one operating condition, angularly movable relative to each other to allow angular articulation between the maneuvering handle (10) and the base portion (20); o at least one torque transmission member (60) positioned between the external body (40) and the internal body (50), said at least one torque transmission member (60) having an operating portion received within said at least one recessed channel (53) of the internal body (50) and movable relative to the internal body (50) along the at least one recessed channel (53) of the internal body (50).

[0024] A 2nd aspect is directed to a floor cleaning device (100) comprising:

[0025] - a maneuvering handle (10) configured to be grabbed by an operator to guide said floor cleaning device (100);

[0026] - a base portion (20) including at least one cleaning tool (22) configured to perform floor cleaning operations; - an articulated joint (130) connecting the maneuvering handle (10) to the base portion (20) and configured, at least in one operating condition, to allow angular movement between the maneuvering handle (10) and the base portion (20), said articulated joint (130) comprising: o an external body (140) comprising an inner cavity (141 ) and an inner surface (142) bounding said inner cavity (141 ), the inner surface (142) comprising:

[0027] ■ a contact articulation surface (143) extending along a respective ideal spherical surface (143a);

[0028] ■ torque-transmitting surface (144); o an internal body (150) arranged, at least partially, in the inner cavity (141 ) of the external body (140), the internal body (150) comprising an external surface (151 ) including:

[0029] ■ a contact articulation surface (153) extending along a respective ideal spherical surface (153a), wherein the contact articulation surface (153) of the internal body (150) and the contact articulation surface (143) of the external body (140) are in contact with each other and are configured to allow, at least under said operating condition, angular articulation between the external body (140) and the internal body (150);

[0030] ■ a torque-transmitting surface (154) contacting the torquetransmitting surface (144) of the external body (140) to transmit a maneuver torque between the internal body (150) and the external body (140).

[0031] In an aspect 2bis according to the previous aspect, the ideal spherical surface (143a) of the contact articulation surface (143) of the external body (140) defines a center of the external body (140), and wherein the ideal spherical surface (153a) of the contact articulation surface (153) of the internal body (150) defines a center of the internal body (150).

[0032] In an aspect 2ter according to the previous aspect, the center of the internal body (150) coincides with the center of the external body (140) defining a central point of articulation of the articulated joint (130). In a 2quater aspect according to the previous aspect, the internal body (150) and the external body (140) are angularly mobile with each other solely around said central point of articulation.

[0033] A 3rd aspect is directed to a device (100) for cleaning floors including:

[0034] - a maneuvering handle (10) configured to be grasped by an operator to guide said floor cleaning device;

[0035] - a base portion (20) equipped with at least one cleaning tool (22) configured to perform floor cleaning operations;

[0036] - an articulated joint (30; 130) connecting the maneuvering handle (10) to the base portion (20), said articulated joint (30; 130) comprising: o an external body (40; 140) including an inner cavity (41 ; 141) and an inner surface (42; 142) bounding said inner cavity (41 ; 141 ); o an internal body (50; 150) arranged, at least partially, in the inner cavity (41 ; 141 ) of the external body (40; 140), the external body (40; 140) and the internal body (50; 150) being, at least in one operating condition, angularly movable relative to each other to allow angular articulation between the maneuvering handle (10) and the base portion (20);

[0037] - a locking mechanism (70) configured to define a locking condition wherein the internal body (50; 150) is in angularly locked position relative to the external body (40; 140), said locking mechanism (70) being placed at least partially, optionally entirely, within at least one between the internal body (50) and the external body (40).

[0038] In a 4th aspect according to any one of the previous aspects, the external surface of the internal body extends along a respective ideal spherical surface, said ideal spherical surface defining a center of the internal body.

[0039] In a 5th aspect according to any one of the previous aspects, the internal surface of the external body extends along a respective ideal spherical surface, the ideal spherical surface of the external body defining a center of the external body, the center of the external body being located inside the inner cavity of the external body. In a 5bis aspect according to any one of the previous two aspects, the center of the internal body (50; 150) coincides with the center of the external body (40; 140) defining a central point of articulation of the articulated joint (30; 130).

[0040] In a 5ter aspect according to the previous aspect, the internal body (50; 150) and external body (40; 140) are angularly mobile with each other solely around said central point of articulation.

[0041] In a 6th aspect according to any one of the previous aspects, the at least one torque transmission member (60) includes a first torque transmission member (60') and a second torque transmission member (60") opposite each other with respect to the internal body (50).

[0042] In a 7th aspect according to the previous aspect, the first torque transmission member (60') and the second torque transmission member (60") are equispaced from each other.

[0043] In an 8th aspect according to any one of the previous aspects from the 6th, a straight axis passing through an internal body center intersects both the first torque transmission member (60') and the second torque transmission member (60").

[0044] In a 9th aspect according to any one of the previous aspects, the at least one torque transmission member (60) comprises a first torque transmission member (60'), a second torque transmission member (60"), and a third torque transmission member (60”’) radially spaced from each other, optionally equispaced angularly from each other.

[0045] In a 10th aspect according to any one of the previous aspects, the at least one torque transmission member (60) comprises three, four, or more torque transmission members (60) radially spaced from each other, optionally equispaced angularly from each other.

[0046] In an 11th aspect according to any one of the previous aspects, the articulated joint (30) includes at least as many recessed channels (53) on the internal body (50) as there are torque transmission members (60).

[0047] In a 12th aspect according to any one of the previous aspects, the at least one torque transmission member (60) is fixed relative to the external body (40) optionally during an angular movement of the internal body (50) relative to the external body (40). In a 13th aspect according to any one of the previous aspects, each torque transmission member (60) has a support portion opposite to the operating portion, where the support portion of each torque transmission member (60) is fixed to the external body (40).

[0048] In a 14th aspect according to any one of the previous aspects from the 1st to the 11th, the at least one torque transmission member (60) is movable relative to the external body (40) optionally during a movement of the internal body (50) relative to the external body (40).

[0049] In a 15th aspect according to the previous aspect, the external body (40) includes respective one or more recessed channels (43) formed on the internal surface (42) of the external body (40) and receiving the at least one torque transmission member (60).

[0050] In a 16th aspect according to the previous aspect, the at least one torque transmission member (60) is movable relative to the external body (40) along said one or more recessed channels (43) of the external body (40).

[0051] In a 17th aspect according to any one of the previous aspects from the 15th, the one or more recessed channels (43) of the external body (40) extend in length along a channel trajectory (CT) optionally substantially parallel to one / the channel trajectory (CT) of the one or more recessed channels (53) of the internal body (50). In an aspect 17bis according to any one of the above aspects, the recessed channels (53) of the internal body (50) are excavated on the external surface (51 ) of the internal body (50) to define an indentation of the external surface (51 ).

[0052] In a 17ter aspect according to any one of the previous aspects, the recessed channels (43) of the external body (40) are excavated on the internal surface (42) of the external body (40) to define an indentation of the internal surface (42).

[0053] In an 18th aspect according to any one of the previous aspects, the first torque transmission member and the second torque transmission member each present elongated form along a respective extension axis (EA), and wherein the first torque transmission member (60') and the second torque transmission member (60") are coaxial with each other and present respective integral supporting portions with or fixed to opposite sides of the external body (40).

[0054] In a 19th aspect according to any one of the preceding aspects, when the at least one torque transmission member (60) is fixed relative to the external body (40), the external body (40) includes at least one recessed seat (48) receiving a support portion of said at least one torque transmission member (60), the torque transmission member (60) being interposed between said recessed seat (48) of the external body (40) and said recessed channel (53) of the internal body (50), optionally the internal body (50) maintaining the at least one torque transmission member (60) in stationary position within said recessed seat of the external body (40), wherein the recessed seat is positioned within the inner cavity (41 ) of the external body (40).

[0055] In a 20th aspect according to any one of the preceding aspects, the external body (40) includes at least one fixing seat (44) fixedly coupled to a support portion of said at least one torque transmission member (60), the torque transmission member (60) being interposed between said fixing seat (44) of the external body (40) and said recessed channel (53) of the internal body (50).

[0056] In a 21 st aspect according to any one of the previous aspects, the at least one torque transmission member (60) and the external body (40) are made in one piece.

[0057] In a 22nd aspect according to any one of the previous aspects, the articulated joint (30; 130) is a homokinetic joint.

[0058] In a 23rd aspect according to any one of the previous aspects, the operating portion of the at least one torque transmission member (60) is configured to always remain within the at least one recessed channel (53) of the internal body (50) during any angular movement between the internal body (50) and the external body (40).

[0059] In a 24th aspect according to any one of the previous aspects, the operating portion of each torque transmission member (60) always remains positioned within the respective recessed channel (53) of the internal body (50) during any angular movement between the internal body (50) and the external body (40).

[0060] In a 25th aspect according to any one of the preceding aspects, the at least one torque transmission member (60) includes one among at least one pin, optionally a pin having a cylindrical or spherical operating portion, and at least a spherical element, optionally a sphere.

[0061] In a 26th aspect according to any one of the previous aspects, the external body (40) is coupled to the internal body (50) such that translation movements between the external body and the internal body are prohibited. In a 27th aspect according to the previous aspect, said translation movements include movements of moving away and / or moving closer between the internal body (50) and the external body (40).

[0062] In a 28th aspect according to any one of the previous aspects, the external body (40) surrounds the internal body (50) defining an undercut that prevents a relative axial translation between the internal body (50) and the external body (40).

[0063] In a 29th aspect according to any one of the previous aspects, the internal surface of the external body (40; 140) defines an undercut with the external surface of the internal body (50; 150) to prevent relative axial translation between the internal body (50; 150) and the external body (40; 140).

[0064] In a 30th aspect according to any one of the previous aspects, the inner cavity (41 ; 141 ) of the external body (40; 140) has a rounded shape.

[0065] In a 31 st aspect according to any one of the previous aspects, the internal surface (42; 142) of the external body (40; 140) has rounded shape.

[0066] In a 32nd aspect according to any one of the previous aspects, the internal surface (42; 142) of the external body (40; 140) has a semi-spherical shape.

[0067] In a 33rd aspect according to any one of the preceding aspects, at least a portion of the external surface (51 ; 151 ) of the internal body (50; 150) is in contact with at least a portion of the internal surface (42; 142) of the external body (40; 140) to allow angular articulation between the internal body (50; 150) and the external body (40; 140) and optionally to provide axial constraint between the internal body and the external body .

[0068] In a 34th aspect according to any one of the previous aspects, the internal body (50) has rounded shape, optionally the internal body (50) being a sphere contacting the inner surface (42) of the external body (40), wherein the inner cavity (41 ) of the external body (40) is counter-shaped to the rounded shape of the internal body (50). In a 35th aspect according to any one of the preceding aspects, the internal body is a multi-faceted solid , wherein one or more, optionally a plurality, of edges and / or vertices of the multi-faceted solid are in contact with the inner surface (42) of the external body (40), optionally wherein said one or more edges and / or vertices of the multi-faceted solid are rounded, optionally wherein the inner cavity (41 ) of the external body (40) has rounded shape . In a 36th aspect according to any one of the preceding aspects, the internal body (50) is a cube, wherein one or more, optionally a plurality, of edges and / or vertices of the cube are in contact with the inner surface (42) of the external body (40), optionally wherein said one or more edges and / or vertices of the cube are rounded, optionally wherein the inner cavity (41 ) of the external body (40) has rounded shape. In a 37th aspect according to any one of the preceding aspects, the internal body (50; 150) comprises an articulating portion (54) housed, optionally housed entirely, within the inner cavity (41 ; 141 ) of the external body (40; 140), said articulating portion (54) being configured to allow articulation between the internal body (50; 150) and the external body (40; 140) and to constrain the internal body (50; 150) to the external body (40; 140) to prevent relative axial movements of the internal body (50; 150) relative to the external body (40; 140).

[0069] In a 38th aspect according to any one of the previous aspects, the internal body (50; 150) includes or is attached to a coupling portion (55; 155) constrained, or configured to be constrained, to a respective coupling portion (11 ) of the maneuvering handle (10).

[0070] In a 39th aspect according to any one of the previous aspects, the external body (40; 140) includes a coupling portion (45; 145) constrained, or configured to be constrained, to a respective coupling portion (21) of the base portion (20).

[0071] In a 40th aspect according to any one of the previous aspects from the 1st to the 37th, the internal body (50; 150) includes a coupling portion (55; 155) constrained, or configured to be constrained, to a respective coupling portion (21 ) of the base portion (20).

[0072] In a 41 st aspect according to any one of the preceding aspects from the 1st to the 37th, the external body (40; 140) includes or is fixed to a coupling portion (45; 145) constrained, or configured to be constrained, to a respective coupling portion (11 ) of the maneuvering handle (10).

[0073] In a 42nd aspect according to any one of the previous aspects, the coupling portion (55; 155) of the internal body (50; 150) is arranged within the inner cavity (41 ; 141 ) of the external body (40; 140) or wherein the coupling portion (55; 155) of the internal body (50; 150) protrudes outside the inner cavity (41 ; 141 ) of the external body (40; 140). In a 43rd aspect according to any one of the preceding aspects, a numerical quantity of said at least one torque transmission member (60) is equivalent to a numerical quantity of said at least one recessed channel (53) of the internal body (50), optionally wherein the articulated joint (30) includes as many torque transmission members (60) as recessed channels (53) of the internal body (50).

[0074] In a 44th aspect according to any one of the previous aspects from the 15th, a numerical quantity of said at least one torque transmission member (60) is equivalent to a numerical quantity of said at least one recessed channel (43) or recessed seat of the external body (40).

[0075] In a 45th aspect according to any one of the preceding aspects, the at least one recessed channel (53) of the internal body (50) includes side walls (53a, 53b), optionally a first side wall (53a) and a second side wall (53b), facing each other, configured to receive and guide a respective torque transmission member (60).

[0076] In a 46th aspect according to the previous aspect, the torque transmission member (60) is interposed between said side walls (53a, 53b) and substantially rests against said side walls of the recessed channel (53) of the internal body (50).

[0077] In a 47th aspect according to any one of the preceding aspects from the 15th, the at least one recessed channel (43) of the external body (40) includes respective side walls (43a, 43b), optionally a first side wall (43a) and a second side wall (43b), facing each other, configured to receive and guide a respective torque transmission member (60).

[0078] In a 48th aspect according to the previous aspect, the torque transmission member (60) is interposed between said side walls (43a, 43b) and substantially rests against said side walls (43a, 43b) of the recessed channel (43) of the external body (40).

[0079] In a 49th aspect according to any one of the previous aspects, each recessed channel of the at least one recessed channel (53) of the internal body (50) includes a bottom wall (53c), interposed between said first side wall (53a) and said second side wall (53b).

[0080] In a 50th aspect according to the previous aspect, said bottom wall (53c) is configured to contact the at least one torque transmission member (60).

[0081] In a 51 st aspect according to any one of the previous aspects, the one or more recessed channels (43, 53) have a section having a "C" or "II" profile, said section being defined on a plane passing through the first side wall (53a), the second side wall (53b) and the bottom wall (53c), said plane being orthogonal to said first side wall (53a) and said second side wall (53b).

[0082] In a 52nd aspect according to any one of the previous aspects, the external body (40; 140) includes an articulation opening (46; 146) that places the inner cavity (41 ; 141 ) in communication with the external environment.

[0083] In a 53rd aspect according to the previous aspect, a coupling portion (55; 155) of the internal body (50), connecting to the maneuvering handle (10) or base portion (20), faces or crosses said articulation opening (46; 146).

[0084] In a 54th aspect according to any one of the previous aspects from the 52nd, said articulation opening (46; 146) has an extension configured to allow angular movement between the internal body (50; 150) and the external body (40; 140).

[0085] In a 55th aspect according to any one of the preceding aspects, a coupling portion (45; 145) of the external body (40; 140) to connect to the base portion (20) or the maneuvering handle (10) is opposite said articulation opening (46; 146) than the inner cavity (41 ; 141), optionally where the inner cavity (41 ; 141 of the external body (40; 140) is interposed between said coupling portion (45; 145) of the external body (40; 140) and the articulation opening (46; 146).

[0086] In a 56th aspect according to any one of the previous aspects, the articulation opening (46; 146) lies entirely on an opening plane.

[0087] In a 57th aspect according to the previous aspect, the recessed channels (53) of the internal body (50), and optionally the recessed channels (43) of the external body (40), have an elongated shape along a channel trajectory (CT).

[0088] In a 58th aspect according to the previous aspect, said channel trajectory (CT) is transverse to said opening plane of the articulation opening.

[0089] In a 59th aspect according to any one of the previous aspects from the 57th, said internal body (50) is positionable in at least one working position wherein the channel trajectory is orthogonal to said opening plane of the articulation opening.

[0090] In a 60th aspect according to any one of the previous aspects from the 57th, said channel trajectory (CT) has a curved profile.

[0091] In a 60bis aspect according to any one of the previous aspects from the 57th, said channel trajectory (CT) extends along an ideal circumference.

[0092] In a 61 st aspect according to any one of the preceding aspects, the base portion (20) defines, in a working condition wherein the base portion (20) is on the floor, a footprint perimeter that projects orthogonal to the floor, and wherein the articulated joint (30; 130) defines, in said working condition, a respective footprint perimeter that projects orthogonal to the floor, and where the footprint perimeter of the articulated joint (30; 130) falls outside the footprint perimeter of the base portion (20).

[0093] In a 62nd aspect according to the previous aspect, the footprint perimeter of the articulated joint (30; 130) falls behind the footprint perimeter of the base portion (20) with respect to a standard forward direction of the floor cleaning device.

[0094] In a 62bis aspect according to any one of the previous aspects, the internal body (50) includes a bottom portion (56) opposite, with respect to a center of the internal body (50), from the coupling portion (55) of the internal body (50), said center of the internal body (50) being interposed between the bottom portion (56) of the internal body (50) and the coupling portion (55) of the internal body (50).

[0095] In a 62ter aspect according to the previous aspect, the one or more recessed channels (53) of the internal body (50) extend in length along a channel trajectory (CT) between said coupling portion (55) of the internal body (50) and said bottom portion (56) of the internal body (50).

[0096] In a 62quater aspect according to any one of the previous aspects from the 57th and in combination with at least aspect 62bis, said channel trajectory (CT) extends along an ideal circumference intersecting said coupling portion (55) of the internal body (50) and said bottom portion (56) of the internal body (50).

[0097] In a 63rd aspect according to any one of the previous aspects, the articulated joint (30; 130) includes a locking mechanism (70) configured to define a locking condition wherein the internal body (50; 150) is in angularly locked, optionally fixed, position relative to the external body (40; 140).

[0098] In a 64th aspect according to the previous aspect, said locking mechanism (70) is placed at least partially, optionally entirely, inside the internal body (50; 150) and / or inside the external body (40; 140).

[0099] In a 65th aspect according to any one of the previous aspects from the 63rd, in said locking condition, the locking mechanism (70) is configured to prevent a relative angular tilt between the maneuvering handle (10) and the base portion (20), optionally between the longitudinal axis HA of the maneuvering handle and the base portion. In a 66th aspect according to any one of the previous aspects from the 63rd, said locking mechanism (70) includes a locking socket (71 ) and locking plug (72) active between the internal body (50; 150) and external body (40; 140).

[0100] In a 67th aspect according to the previous aspect, said locking plug (72) is movable between an operating position and a locking position to define respectively:

[0101] - the operating condition, wherein the locking plug (72) is outside the locking socket (71 ) to allow angular articulation between the internal body (50; 150) and the external body (40; 140); and

[0102] - said locking condition, wherein the locking plug (72) is inserted within said locking socket (71 ) to lock the internal body (50; 150) to the external body (40; 140).

[0103] In a 68th aspect according to any one of the previous aspects from the 66th, the locking socket (71 ) is formed on the internal surface (42) of the external body (40; 140) and the locking plug (72) is carried by the internal body (50; 150), optionally by the articulating portion (54) of the internal body (50; 150).

[0104] In a 69th aspect according to the previous aspect, the locking plug (72) is movable within the internal body (50; 150) between said operating position and said locking position, for example movable by translation.

[0105] In a 70th aspect according to any one of the previous aspects from the 68th, in the locking position, the locking plug (72) protrudes from the external surface (51 ; 151 ) of the internal body (50; 150) toward and within the locking socket (71 ) of the external body (40; 140).

[0106] In a 71 st aspect according to any one of the previous aspects from the 68th, in the operating position, the locking plug (72) is outside the locking socket (71 ).

[0107] In a 72nd aspect according to any one of the previous aspects from the 68th, the locking plug (72) is housed, at least partially, within the internal body (50; 150), optionally without protruding externally from the external surface (51 ; 151 ) of the internal body (50; 150).

[0108] In a 73rd aspect according to any one of the previous aspects from the 68th, in the operational position the locking plug (72) is fully housed within the internal body (50; 150).

[0109] In a 74th aspect according to any one of the previous aspects the 1 st to the 67th, the locking socket (71 ) is formed on the external surface (51 ; 151 ) of the internal body (50; 150) and the locking plug (72) is carried by the external body (40; 140). In a 75th aspect according to the previous aspect, the locking plug (72) is movable within the external body (40; 140) between said operating position and said locking position, for example movable by translation.

[0110] In a 76th aspect according to any one of the previous aspects from the 74th, in the locking position, the locking plug (72) protrudes from the internal surface (42; 142) of the external body (40; 140) within the inner cavity (41 ; 141 ).

[0111] In a 77th aspect according to any one of the previous aspects from the 74th, in the operating position, the locking plug (72) is outside the locking socket (71 ), the locking plug (72) being housed at least partially within the external body (40; 140).

[0112] In a 78th aspect according to any one of the previous aspects from the 74th, in the operating condition, the locking plug does not protrude into the inner cavity (41 ; 141 ) of the external body (40; 140).

[0113] In a 79th aspect according to any one of the previous aspects from the 74th, in the operating position the locking plug (72) is fully housed within the external body (40; 140).

[0114] In an 80th aspect according to any one of the preceding aspects from the 63rd, said locking mechanism (70) is configured, in said locking condition, to define a stable resting position of the floor cleaning device wherein the floor cleaning device rests on the floor at the base portion (20) and wherein the maneuvering handle (10) optionally extends in height above the base portion (20).

[0115] In an 81 st aspect according to the previous aspect, in said stable resting position, the device is balanced on the floor.

[0116] In an 82nd aspect according to any one of the previous aspects from the 80th, in said stable rest position a center of gravity of the floor cleaning device falls within a footprint perimeter of the base portion (20).

[0117] In an 83rd aspect according to any one of the preceding aspects from the 63rd, the floor cleaning device includes an actuation mechanism (73) operatively connected to the locking mechanism (70) and configured to switch the locking mechanism (70) between the operating condition and the locked condition, and vice versa.

[0118] In an 84th aspect according to the previous aspect, said actuation mechanism is arranged on the maneuvering handle (10) or base portion (20) and is configured to be operated by an operator. In an 85th aspect according to any one of the preceding aspects from the 83rd, the actuation mechanism is operationally connected to the locking plug (72) of the locking mechanism (70) and configured to move the locking plug (72) between the operating position and the locking position.

[0119] In an 86th aspect according to any one of the previous aspects from the 63rd, the locking mechanism includes a spring element (74), optionally a spring, active on the locking plug (72) and pushing the locking plug (72) in one direction from the operating position to the locking position.

[0120] In an 87th aspect according to the previous aspect, said spring element (74) exerts a thrust on the locking plug (72) in a direction extending from the operating position to the locking position during both the operating and locking conditions.

[0121] In an 88th aspect according to any one of the previous aspects from the 86th and in combination with the 68th aspect the spring element (74) is fully housed within the internal body (50; 150).

[0122] In an 89th aspect according to any one of the previous aspects from the 86th and in combination with the 74th aspect, the spring element (74) is entirely housed within the external body (40; 140).

[0123] In a 90th aspect according to any one of the previous aspects from the 86th, the spring element (74) is housed within a body, selected between the internal body (50; 150) and the external body (40; 140), carrying the locking plug (72).

[0124] In a 91st aspect according to any one of the previous aspects from 83rd, the actuation mechanism (73) includes a release cable (75) connected to the locking plug (72) and configured to pull the locking plug (72) from the locking position to the operating position.

[0125] In a 92nd aspect according to the previous aspect, the actuation mechanism (73) includes an actuation lever or knob or pedal configured to be manipulated by an operator to pull said cable.

[0126] In a 93rd aspect according to any one of the previous aspects from the 83rd, said actuation mechanism (73) includes a stop configured, upon operator command, to hold the locking plug (72) in the operating position.

[0127] In a 94th aspect according to the previous aspect, said stop is releasable to allow a movement of the locking plug from the operating position to the locking position, the spring element (74) providing a push on the locking plug (72) to move the latter from the operating position to the locking position.

[0128] In a 95th aspect according to any one of the previous aspects from the 93rd, said stop is active on the locking plug (72) or release cable (75).

[0129] In a 96th aspect according to any one of the previous aspects from the 83rd, the actuation mechanism (73) includes an electric actuator connected to the locking plug (72) and configured to move the locking plug (72) between the locking position and the operating position, optionally to move the locking plug (72) from the locking position to the operating position and vice versa.

[0130] In a 97th aspect according to the previous aspect, the actuation mechanism (73) comprises an actuation lever or knob or pedal configured to be operated by an operator to command the activation of said electric actuator.

[0131] In a 98th aspect according to any one of the previous aspects, the at least one torque transmission member (60) is positioned, at least partially, within the inner cavity (41 ) of the external body (40) during any angular movement of the inner body (50) relative to the outer body (40).

[0132] In a 99th aspect according to any one of the previous aspects, the articulated joint (30; 130) is configured to allow an angular tilt of the maneuvering handle (10) in any angular direction relative to the base portion (20).

[0133] In a 100° aspect according to any one of the preceding aspects, said articulated joint (30) is configured to allow an inclination of the maneuvering handle (10) with respect to the base portion (20) in any angular direction of an allowed angular displacement greater than 90°, optionally greater than 120° or 150°, optionally where said allowed angular displacement being between 70° and 175°, optionally between 90° and 175°, plus optionally between 110° and 170°.

[0134] In a 101 st aspect according to any one of the previous aspects, the articulated joint (30; 130) is configured to allow an angulartilt of the maneuvering handle (10) relative to the base portion (20) around a first axis (X) and a second axis (Y).

[0135] In a 102nd aspect according to the previous aspect, the first axis (X) extends through the at least one torque transmission member (60), optionally through one / the first and second torque transmission elements (60', 60").

[0136] In a 103rd aspect according to any one of the previous aspects from the 101 st, the first axis (X) is fixed relative to the external body (40). In a 104th aspect according to any one of the previous aspects from the 101 st, the second axis (Y) is orthogonal to the first axis (X).

[0137] In a 105th aspect according to any one of the previous aspects from the 101 st, the first axis (X) and the second axis (Y) define a lay plane that is transverse, optionally orthogonal, to the extension axis of the one or more recessed channels (53) of the internal body (50).

[0138] In a 106th aspect according to the previous aspect, said lying plane of the first axis (X) and second axis (Y) is parallel to the plane of the articulation opening (46).

[0139] In a 107th aspect according to any one of the above, the floor cleaning tool (22) includes a motorized cleaning tool (23), optionally a brush.

[0140] In a 108th aspect according to any one of the previous aspects, the base portion (20) carries a fluid injector configured to deliver a fluid / liquid on the floor.

[0141] In a 109th aspect according to any one of the previous aspects, the base portion (20) includes a motor (24), optionally an electric motor, configured to move the 'cleaning tool.

[0142] In a 110th aspect according to any one of the preceding aspects, the floor cleaning device (100) includes a floor squeegee (80) coupled with a rear part of the base portion (20) with respect to a standard forward direction of the floor cleaning device. In a 111th aspect according to the previous aspect, the floor squeegee (80) is bound to the base portion (20) or second end (10b) of the maneuvering handle (10).

[0143] In a 112th aspect according to any one of the previous aspects, the external body (40; 140) comprises a first shell and a second shell distinct from each other and bound together to define the external body.

[0144] In a 113th aspect according to the previous aspect, the first shell and second shell are symmetrical to each other and coupled to each other to define the inner cavity (41 ; 141 ).

[0145] In a 114th aspect according to any one of the previous aspects from the 112th, each between the first shell and the second shell includes a respective portion of the internal surface (42; 142) of the external body (40; 140).

[0146] In a 115th aspect according to any one of the previous aspects from the 112th, the portion of the inner surface (42; 142) of the first shell of the external body (40; 140) is symmetrical to the portion of the inner surface (42; 142) of the second shell of the external body (40; 140). In a 116th aspect according to any one of the previous aspects from the 112th, the first shell and the second shell define, when bound together, an undercut between the internal body (50; 150) and the external body (40; 140).

[0147] In a 117th aspect according to any one of the preceding aspects, the floor cleaning device includes a removably engageable coupling element to the external body (40; 140) to define an undercut between the external body (40; 140) and the internal body (50; 150), said coupling element being positioned substantially at the articulation opening (46; 146).

[0148] In a 118th aspect according to the previous aspect, said coupling element includes one among:

[0149] - a fork insertable within a recess of the external body (40; 140), said fork, when inserted into the external body (40; 140), protruding at least partially within the inner cavity (41 ; 141) of the external body (40; 140) to define an undercut between the external body (40; 140) and the internal body (50; 150);

[0150] - a cover engageable to the external body (40; 140) configured to define, when engaged to the external body (40; 140), an undercut between the external body (40; 140) and the internal body (50; 150).

[0151] In a 119th aspect according to any one of the previous aspects, the maneuvering handle (10) extends in length between a gripping portion (12), configured to be grasped by an operator to guide said floor cleaning device, and a coupling portion (1 1 ) connected to the articulated joint (30; 130).

[0152] In a 120° aspect according to any one of the previous aspects, the maneuvering handle (10) includes a substantially straight maneuvering rod extending between the gripping portion (12) and the coupling portion (11 ) of the maneuvering handle.

[0153] In a 121 st aspect according to any one of the previous aspects, said maneuvering handle (10) is connected to one between the internal body (50; 150) and the external body (40; 140).

[0154] In a 122nd aspect according to any one of the previous aspects, the internal body (50) is movable relative to the at least one torque transmission member (60).

[0155] A 123rd aspect is directed to a floor cleaning device (100) comprising:

[0156] - a maneuvering handle (10) configured to be grabbed by an operator to guide said floor cleaning device (100); - a base portion (20) including at least one cleaning tool (22) configured to perform floor cleaning operations;

[0157] - an articulated joint (130) connecting the maneuvering handle (10) to the base portion (20) and configured, at least in one operating condition, to allow angular movement between the maneuvering handle (10) and the base portion (20), said articulated joint (130) comprising: o an external body (140) comprising an inner cavity (141 ) and an inner surface (142) bounding said inner cavity (141 ), the inner surface (142) comprising:

[0158] ■ a contact articulation surface (143) extending along a respective ideal spherical surface (143a);

[0159] ■ a torque-transmitting surface (144); o an internal body (150) arranged, at least partially, in the inner cavity (141 ) of the external body (140), the internal body (150) comprising an external surface (151 ) including:

[0160] ■ a contact articulation surface (153) extending along a respective ideal spherical surface (153a), wherein the contact articulation surface (153) of the internal body (150) and the contact articulation surface (143) of the external body (140) are in contact with each other and are configured to allow, at least under said operating condition, angular articulation between the external body (140) and the internal body (150);

[0161] ■ a torque-transmitting surface (154) contacting the torquetransmitting surface (144) of the external body (140) to transmit a maneuver torque between the internal body (150) and the external body (140).

[0162] In a 124th aspect according to the previous aspect, the torque-transmitting surface (154) of the internal body (150) faces the outside of the internal body (150).

[0163] In a 125th aspect according to any one of the previous aspects from the 123rd, the torque-transmitting surface (144) of the external body (140) faces the inner cavity (141) of the external body (140). In a 126th aspect according to any one of the previous aspects from the 123rd, the torque-transmitting surface (154) of the internal body (150) is in contact with the torque-transmitting surface (144) of the external body (140) along a contact line (90). In a 127th aspect according to the previous aspect, said contact line (90) extends along an ideal straight line or on an ideal circumference.

[0164] In a 127bis aspect according to the previous aspect, said ideal straight line or said ideal circumference on which the contact line (90) extends does not intersect the internal body (150).

[0165] In a 128th aspect according to any one of the previous aspects from the 126th, said contact line (90) extends outside the internal body (150).

[0166] In a 129th aspect according to any one of the previous aspects the 126th, said contact line (90) or a continuation of said contact line (90) does not intersect the internal body (150).

[0167] In a 130th aspect according to any one of the previous aspects the 126th, said contact line (90) is tangent to the internal body (150).

[0168] In a 131 st aspect according to any one of the previous aspects, the internal body (150) includes a first, second and third axis of rotation (X, Y, Z) orthogonal to each other.

[0169] In a 132nd aspect according to the previous aspect, the internal body is movable by rotation around the first axis (X) relative to the external body (140).

[0170] In a 133rd aspect according to any one of the previous aspects from the 131 st, the internal body is movable by rotation about the second axis (Y) relative to the external body (140).

[0171] In a 134th aspect according to any one of the previous aspects from the 131 st, the first, second and third axes (X, Y, Z) are movable relative to the external body (140). In a 135th aspect according to any one of the previous aspects from the 131 st, a rotation of the internal body (150) around said third axis (Z) results in a respective rotation of the external body (140) around a respective axis of rotation (Z1) of the external body (140).

[0172] In a 136th aspect according to the previous aspect, the axis of rotation (Z') of the external body (140) is orthogonal to the floor during a working condition of the floor cleaning device (100). In a 137th aspect according to any one of the previous aspects from the 131 st, the third axis (Z) of the internal body (150) intersects the axis of rotation of the external body (140) during any angular tilt between the internal body (150) and the external body (140).

[0173] In a 138th aspect according to any one of the previous aspects from the 131 st, the third axis (Z) of the internal body (150) intersects a midpoint of the internal body (150), and where said axis of rotation (Z1) of the external body (140) intersects a midpoint of the inner cavity (141 ) of the external body (140), the midpoint of the internal body (150) corresponding to the midpoint of the external body (140) defining a midpoint of the articulated joint (130).

[0174] In a 139th aspect according to any one of the previous aspects, the torquetransmitting surface (144) of the external body (140) and the torque-transmitting surface (154) of the internal body (150) define, in combination, a geometric shape constraint to transmit the maneuvering torque between the maneuvering handle and the base portion.

[0175] In a 140th aspect according to any one of the above, a cross-section of the internal body (150), passing through both the contact articulation surface (153) and the torque-transmitting surface (154), defines a convex perimeter edge (159) of the internal body (150).

[0176] In a 141 st aspect according to the previous aspect, said section extends along a plane orthogonal to the third axis (Z) of the internal body (150).

[0177] In a 142nd aspect according to any one of the previous aspects from the 140th, said internal body cross section (150) passing through or including said contact line (90). In a 143rd aspect according to any one of the preceding aspects, a cross-section of the external body (140), passing through both the contact articulation surface (143) and the torque-transmitting surface (144), defines a convex perimeter edge (149) of the external body (140) bounding the inner cavity (141 ).

[0178] In a 144th aspect according to the previous aspect, said external body cross section (140) passes through or includes said contact line (90).

[0179] In a 145th aspect according to any one of the previous aspects from the 143rd, said external body section (140) extending along a plane parallel to the plane of the articulation opening (146). In a 146th aspect according to any one of the previous aspects, the torquetransmitting surface (144) of the external body (140) is contained within said respective ideal spherical surface (143a) of the contact articulation surface (143) of the external body (140).

[0180] In a 147th aspect according to any one of the previous aspects, the torquetransmitting surface (154) of the internal body (150) is contained within said respective ideal spherical surface (153a) of the contact articulation surface (153) of the internal body (150).

[0181] In a 148th aspect according to any one of the previous aspects, the torquetransmitting surface (144) of the external body (140) is flat and lies on a torquetransmitting plane.

[0182] In a 149th aspect according to any one of the above, the torque-transmitting surface (154) of the internal body (150) has a curved shape defining a portion of a cylindrical surface extending along a cylinder axis.

[0183] In a 150th aspect according to the previous aspect, said cylinder axis is parallel to said plane of torque transmission during any angular articulation between the internal body (150) and the external body (140).

[0184] In an aspect 150bis according to any one of the previous aspects from the 149th, said cylindrical surface of the torque-transmitting surface (154) of the internal body (150) has a diameter smaller than a diameter of the spherical surface (153a) of the contact articulation surface (153) of the internal body (150).

[0185] In a 151 st aspect according to any one of the previous aspects from the 123rd to the 147th, the torque-transmitting surface (144) of the external body (140) is curved by defining a cylindrical surface extending along a respective cylinder axis and having a respective radius of curvature.

[0186] In a 152nd aspect according to the previous aspect, the torque-transmitting surface (154) of the internal body (150) extends along a respective spherical surface.

[0187] In a 153rd aspect according to the previous aspect, said spherical surface of the torque-transmitting surface (154) of the internal body (150) has a larger radius of curvature than a radius of curvature of the spherical surface (153a) of the contact articulation surface (153) of the internal body (150).

[0188] In a 154th aspect according to any one of the previous aspects from the 151 st, the radius of curvature of the cylindrical surface of the torque-transmitting surface (144) of the external body (140) is equivalent to the radius of curvature of the spherical surface of the torque-transmitting surface (154) of the internal body (150).

[0189] In a 155th aspect according to any one of the above aspects, said cylindrical surface of the torque-transmitting surface (154) of the internal body (150) has a diameter smaller than a diameter of the spherical surface (153a) of the contact articulation surface (153) of the internal body (150).

[0190] In a 156th aspect according to any one of the previous aspects from the 123rd, the torque-transmitting surface (154) of the internal body (150) includes a contact portion (157), and the torque-transmitting surface (144) of the external body (140) includes a respective contact portion (147) contacting the contact portion (157) of the internal body (150).

[0191] In a 157th aspect according to the previous aspect, the contact portions (147, 157) of the internal body (150) and external body (140) substantially have a straight-line shape defining said the contact line (90).

[0192] In a 158th aspect according to any one of the previous aspects from the 156th, during a first angular movement between the internal body (150) and the external body (140), the contact portion (157) of the torque-transmitting surface (154) of the internal body (150) changes its position on the torque-transmitting surface (154) of the internal body (150).

[0193] In a 159th aspect according to the previous aspect, at the same time, the contact portion (147) of the torque-transmitting surface (144) of the external body (140) maintains its position on the torque-transmitting surface (144) of the external body (140).

[0194] In a 160th aspect according to any one of the previous aspects from the 158th, said first angular motion is defined around said first axis (X) of the internal body (150).

[0195] In a 161 st aspect according to any one of the previous aspects from the 156th, during a second angular movement between the internal body (150) and the external body (140), the contact portion (157) of the torque-transmitting surface (154) of the internal body (150) maintains its position on the torque-transmitting surface (154) of the internal body (150).

[0196] In a 162nd aspect according to the previous aspect, at the same time, the contact portion (147) of the torque-transmitting surface (144) of the external body (140) changes its position on the torque-transmitting surface (144) of the external body (140).

[0197] In a 163rd aspect according to any one of the previous aspects from the 161 st, said second angular motion defines an axis of rotation orthogonal to an axis of rotation of the first angular motion.

[0198] In a 164th aspect according to any one of the previous aspects from the 161 st, the second angular motion is defined around said second axis (Y) of the internal body (150).

[0199] In a 165th aspect according to any one of the previous aspects from the 131 st, the first axis (X) is parallel to the torque-transmitting surface (144) of the external body (140).

[0200] In a 166th aspect according to any one of the previous aspects from the 149th, the first axis (X) is parallel to or coincides with the cylinder axis of the cylindrical surface of the torque-transmitting surface (154) of the internal body (150).

[0201] In a 167th aspect according to any one of the previous aspects from the 149th, the second axis (Y) is orthogonal to the cylinder axis of the cylindrical surface of the torque-transmitting surface (154) of the internal body (150).

[0202] In a 168th aspect according to any one of the previous aspects from the 131 st, the second axis (Y) is orthogonal to the torque-transmitting surface (144) of the external body (140).

[0203] In a 168th aspect according to any one of the previous aspects from the 123rd, the torque-transmitting surface (144) of the external body (140) includes a first torquetransmitting surface (144') and a second torque-transmitting surface (144") separated from each other.

[0204] In a 169th aspect according to the previous aspect, the first torque-transmitting surface (144') and the second torque-transmitting surface (144") of the external body (140) face and oppose each other.

[0205] In a 170th aspect according to any one of the previous aspects from the 168th, the first torque-transmitting surface (144') and the second torque-transmitting surface (144") of the external body (140) are angularly offset 180° from each other.

[0206] In a 171 st aspect according to any one of the previous aspects from the 123rd, the torque-transmitting surface (154) of the internal body (150) includes a first torque- transmitting surface (154') and a second torque-transmitting surface (154") separated from each other.

[0207] In a 172nd aspect according to the previous aspect, the first torque-transmitting surface (154') and the second torque-transmitting surface (154") of the internal body (150) are opposite to each other with respect to a center of the internal body (150). In a 173rd aspect according to any one of the previous aspects from the 171 st, the first torque-transmitting surface (154') and the second torque-transmitting surface (154") of the internal body (150) are angularly offset 180° from each other.

[0208] In a 174th aspect according to any one of the previous aspects from the 171 st, the first torque-transmitting surface (154') of the internal body (150) is in contact with the first torque-transmitting surface (144') of the external body (140), and wherein the second torque-transmitting surface (154") of the internal body (150) is in contact with the second torque-transmitting surface (144") of the external body (140).

[0209] In a 175th aspect according to any one of the previous aspects from the 168th, a maximum distance between the first torque-transmitting surface (144') and the second torque-transmitting surface (144") of the external body (140) is less than a diameter of the spherical surface (143a) of the contact articulation surface (143) of the external body (140).

[0210] In a 176th aspect according to any one of the previous aspects from the 171 st, a maximum distance between the first torque-transmitting surface (154') and the second torque-transmitting surface (154") of the internal body (150) is less than a diameter of the spherical surface (153a) of the contact articulation surface (153) of the internal body (150).

[0211] In a 177th aspect according to any one of the previous aspects from the 168th, the first torque-transmitting surface (144') and the second torque-transmitting surface (144") of the external body (140) have a flat shape.

[0212] In a 178th aspect according to any one of the previous aspects from the 168th, the first torque-transmitting surface (144') and the second torque-transmitting surface (144") of the external body (140) are parallel to each other.

[0213] In a 179th aspect according to any one of the preceding aspects from the 168th, the first torque-transmitting surface (154') of the internal body (150), and the second torque-transmitting surface (154") of the internal body (150) have equal cylindrical shape to each other. In a 180° aspect according to any one of the previous aspects from the 168th, the first torque-transmitting surface (154') of the internal body (150), and the second torque-transmitting surface (154") of the internal body (150) define respective concavities facing each other.

[0214] In a 181 st aspect according to any one of the previous aspects from the 123rd, the contact articulation surface (153) of the internal body (150) includes a first contact articulation surface (153') and a second contact articulation surface (153").

[0215] In a 182nd aspect according to the previous aspect, the first contact articulation surface (153') and the second contact articulation surface (153") of the internal body (150) are opposite to each other with respect to a center of the internal body (150). In a 183° aspect according to any one of the previous aspects from the 181 st, the first contact articulation surface (153') and the second contact articulation surface (153") of the internal body (150) are angularly offset 180° from each other.

[0216] In a 184th aspect according to any one of the previous aspects from the 181 st, the first contact articulation surface (153') of the internal body (150) is in contact with the contact articulation surface (143) of the external body (140).

[0217] In a 185th aspect according to any one of the previous aspects from the 181 st, the second contact articulation surface (153") of the internal body (150) is in contact with the contact articulation surface (143) of the external body (140).

[0218] In a 186th aspect according to any one of the previous aspects from the 123rd, an internal body cross-section (150) passing through both the contact articulation surface (153) and the torque-transmitting surface (154) defines a profile including:

[0219] - at least one curved line of the contact articulation surface (153) of the internal body (150); and

[0220] - at least one straight line of the torque-transmitting surface (154) of the internal body (150), optionally said straight line connecting together a first and second end of said curved line of the internal body (150).

[0221] In a 187th aspect according to any one of the previous aspects from the 123rd, a cross section of the external body (140) passing through both the contact articulation surface (143) and the torque-transmitting surface (144) defines a profile including:

[0222] - at least one curved line of the contact articulation surface (143) of the external body (140); and - at least one straight line of the torque-transmitting surface (144) of the external body (140), optionally said straight line connecting together a first and second end of said curved line of the external body (140).

[0223] In a 188th aspect according to any one of the previous aspects 186th and 187th, said cross-section passes through a center of the spherical surface (143a) of the internal body (150).

[0224] In a 189th aspect according to any one of the previous aspects from the 186th, the straight line of the internal body cross-section (150) is in contact with the straight line of the external body cross-section (140).

[0225] In a 190th aspect according to any one of the previous aspects from the 186th, said cross section of the internal body is orthogonal to the third axis (Z) of the internal body.

[0226] In a 191 st aspect according to any one of the previous aspects from the 123rd, the articulated joint (130) is a constant velocity joint or homokinetic joint.

[0227] In a 192nd aspect according to any one of the previous aspects from the 123rd, the contact articulation surface (143) of the external body (140) is consecutive to the torque-transmitting surface (144) of the external body (140).

[0228] In a 193rd aspect according to any one of the previous aspects from the 123rd, the contact articulation surface (143) of the external body (140) extends consecutively from one end of the torque-transmitting surface (144) of the external body (140).

[0229] In a 194th aspect according to any one of the previous aspects from the 123rd, the contact articulation surface (153) of the internal body (150) is consecutive to the torque-transmitting surface (154) of the internal body (150).

[0230] In a 195th aspect according to any one of the previous aspects from the 123rd, the contact articulation surface (153) of the internal body (150) extends consecutively from one end of the torque-transmitting surface (154) of the internal body (150).

[0231] In a 196th aspect according to any one of the previous aspects from the 123rd, the contact articulation surface (143) of the external body (140) and the torquetransmitting surface (144) of the external body (140) are directly connected and consecutive to each other.

[0232] In a 197th aspect according to any one of the previous aspects from the 123rd, the contact articulation surface (153) of the internal body (150) and the torque- transmitting surface (154) of the internal body (150) are directly connected and consecutive to each other.

[0233] In a 198th aspect according to any one of the previous aspects from the 123rd, the inner surface (142), optionally the contact articulation surface (143) and / or torquetransmitting surface (144), of the external body (140) does not include any protrusions or pins extending into the inner cavity (141 ).

[0234] In a 199th aspect according to any one of the previous aspects from the 123rd, the external surface (151 ), optionally the contact articulation surface (153) and / or torque-transmitting surface (154), of the internal body (150) does not include any recessed slits.

[0235] In a 200th aspect according to any one of the previous aspects from the 123rd, the external surface (151 ), optionally the contact articulation surface (153) and / or torque-transmitting surface (154), of the internal body (150) does not include any protrusions or pins extending outward from the external surface (151 ).

[0236] In a 201 st aspect according to any one of the previous aspects from the 123rd, the inner surface (142), optionally the contact articulation surface (143) and / or torquetransmitting surface (144), of the external body (140) does not include any recessed slits.

[0237] In a 202nd aspect according to any one of the previous aspects from the 123rd, the articulated joint (130) includes a locking mechanism (70) configured to define a locking condition wherein the internal body (150) is in angularly locked position relative to the external body (140).

[0238] In a 203rd aspect according to the previous aspect, said locking mechanism (70) is placed at least partially, optionally entirely, within the internal body (150) or within the external body (140).

[0239] In a 204th aspect according to any of the 202nd and 203rd aspects, said locking mechanism (70) is in accordance with any of aspects from the 63rd to the 97th.

[0240] In a 205th aspect according to any one of the previous aspects, when the locking plug (72) is in the locking position, the channel trajectory (CT) of the recessed channels (53) of the internal body (50) is orthogonal to the lying plane of the articulation opening (46) of the external body (40).

[0241] In a 206th aspect according to any one of the preceding aspects from the 3rd, said locking mechanism (70) includes a locking socket (71 ) and a locking plug (72) that are active between the internal body (50; 150) and the external body (40; 140), said locking plug (72) being movable between an operating position and a locking position to define respectively:

[0242] - the operating condition, wherein the locking plug (72) is outside the locking socket

[0243] (71 ) allowing angular articulation between the internal body (50; 150) and the external body (40; 140); and

[0244] - said locking condition, wherein the locking plug (72) is inserted within said locking socket (71 ) to lock the internal body (50; 150) to the external body (40; 140).

[0245] In a 207th aspect according to any one of the previous aspects from the 3rd, the locking socket (71 ) is formed on the internal surface (42; 142) of the external body (40; 140) and the locking plug (72) is carried by the internal body (50; 150).

[0246] In a 208th aspect according to the previous aspect, in the locking position, the locking plug (72) protrudes from the external surface of the internal body (50; 150) toward and within the locking socket (71 ) of the external body (40; 140).

[0247] In a 209th aspect according to any one of the previous two aspects, in the operational position, the locking plug (72) is outside the locking socket (71 ) and housed, at least partially, within the internal body (50; 150).

[0248] In a 210th aspect according to the previous aspect, in the operating position, the locking plug (72) is fully housed within the internal body (50; 150).

[0249] In a 21 1th aspect according to any one of the preceding aspects from the 3rd, the locking socket (71 ) is formed on the external surface of the internal body (50; 150) and the locking plug (72) is carried by the external body (40; 140), the locking plug

[0250] (72) being movable within the external body (40; 140) between said operating position and said locking position, for example movable by translation.

[0251] In a 212th appearance according to the previous appearance, in the locking position, the locking plug (72) protrudes from the internal surface (42; 142) of the external body (40; 140) within the inner cavity (41 ; 141 ).

[0252] In a 213th aspect according to any one of the previous two aspects, in the operating position, the locking plug (72) is outside the locking socket (71 ) and housed, at least partially, within the external body (40; 140). In a 214th aspect according to the previous aspect, in the operating position, the locking plug (72) is fully housed within the external body (40; 140).

[0253] In a 215th aspect according to any one of the preceding aspects from the 3rd, the internal body (50; 150) includes a coupling portion (55) engaged, or configured to engage, to a respective coupling portion (11 ; 21 ) of the maneuvering handle (10) or base portion (20).

[0254] In a 216th aspect according to the previous aspect, the internal body (50; 150) includes a bottom portion (56; 156) opposite, with respect to a center of the internal body (50; 150), from the coupling portion (55) of the internal body (50; 150), said center of the internal body (50; 150) being interposed between the bottom portion (56; 156) of the internal body (50; 150) and the coupling portion (55) of the internal body (50; 150).

[0255] In a 217th aspect according to the previous aspect, said locking plug (72) is movable by translation along a direction substantially parallel to and / or coincident with an axis passing through the coupling portion (55) of the internal body (50; 150) and the bottom portion (56; 156) of the internal body (50; 150).

[0256] In a 218th aspect according to any one of the previous aspects from the 3rd, the external body (40; 140) includes an articulation opening (46; 146) that places the inner cavity (41 ; 141 ) in communication with the external environment.

[0257] In a 219th aspect according to the previous aspect, the external body (40; 140) includes a respective bottom portion (40a; 140a) such that the inner cavity (41 ; 141 ) is interposed between said articulation opening (46; 146) and said bottom portion (40a; 140a).

[0258] In a 220th aspect according to the previous aspect:

[0259] - the locking plug (72) emerges, when in the locked position, from the bottom portion (56; 156) of the internal body (50; 150), and

[0260] - the locking socket (71 ) is located at said bottom portion (40a; 140a) of the external body (40; 140); or wherein: - the locking plug (72) emerges, when in the locked position, from the bottom portion (40a; 140a) of the external body (40; 140), and

[0261] - the locking socket (71) is located at said bottom portion (56; 156) of the internal body (50; 150).

[0262] In a 221st aspect according to any one of the previous aspects, the locking plug (72) presents elongated shape along a respective extension axis.

[0263] In a 222nd aspect according to any one of the previous aspects, the locking socket

[0264] (71 ) defines a passage opening configured to receive in insertion the locking plug

[0265] (72) along a respective passage axis.

[0266] In a 223rd aspect according to any one of the previous two aspects, said locking plug extension axis (72) is coaxial to the passage axis of the locking plug passage opening (71 ) when the locking plug (72) is in the locking position, and / or in a condition suitable to allow the locking plug (72) to move from the operating position to the locking position.

[0267] In a 224th aspect according to any one of the previous aspects, the floor cleaning device includes an actuation mechanism operatively connected to the locking mechanism (70) and configured to switch the locking mechanism (70) between the operating condition and the locked condition, and vice versa.

[0268] In a 225th aspect according to the previous aspect, said actuation mechanism includes at least one actuation command (73) arranged on the maneuvering handle (10) or base portion (20) and configured to be operated by an operator.

[0269] In a 226th aspect according to any one of the previous two aspects, the implementation mechanism includes one among:

[0270] - a release cable (75) connected to the locking plug (72) and configured to pull the locking plug (72) from the locking position to the operating position,

[0271] - an electric actuator connected to the locking plug (72) and configured to move the locking plug (72) between the locking position and the operating position, optionally to move the locking plug (72) from the locking position to the operating position and vice versa. In a 227th aspect according to any one of the three previous aspects, the actuation mechanism is operationally connected to the locking plug (72) of the locking mechanism (70) and configured to move the locking plug (72) between the operational position and the locking position.

[0272] In a 228th aspect according to any one of the previous aspects from 224, the actuation mechanism includes a spring element (74), optionally a spring, active in thrust on the locking plug (72) in a direction from the operating position to the locking position.

[0273] In a 229th aspect according to the previous aspect, said spring element (74) is active by pushing on the locking plug (72) in both the operating and locking conditions.

[0274] In a 230th aspect according to any one of the two previous aspects, the spring element (74) is entirely housed within a body, selected between the internal body (50; 150) and the external body (40; 140), housing the locking plug (72).

[0275] In a 231 st aspect according to any one of the previous aspects from the 224th, the actuation mechanism includes a stop configured, upon operator command, to selectively hold the locking plug (72) in the operational position, and release the locking plug (72) to allow a movement of the locking plug (72) from the operational position to the locked position.

[0276] In a 232nd aspect according to the previous aspect, said stop is active on the locking plug (72) or release cable (75).

[0277] In a 233rd aspect according to any one of the preceding aspects, said locking mechanism (70) is configured, in said locking condition, to define a stable resting position of the floor cleaning device wherein the floor cleaning device lies on the floor at the base portion (20) and wherein the maneuvering handle (10) optionally extends in height above the base portion (20).

[0278] In a 234th aspect according to the previous aspect, said stable rest position defines a balance position of the floor cleaning device.

[0279] In a 235th aspect according to the previous aspect, in said stable rest position, a center of gravity of the floor cleaning device falls within a footprint perimeter of the base portion (20). In a 236th aspect according to any one of the previous aspects, the internal body (50; 150) includes an external surface (51 ; 151 ) including at least one recessed channel (53).

[0280] In a 237th aspect according to any one of the preceding aspects, said articulated joint (30; 130) includes at least one torque transmission member (60) positioned between the external body (40; 140) and the internal body (50; 150), said at least one torque transmission member (60) comprising an operational portion received within said at least one recessed channel (53) of the internal body (50; 150).

[0281] In a 238th aspect according to the previous aspect, said at least one torque transmission element (60) is movable relative to the internal body (50; 150) along the at least one recessed channel (53) of the internal body (50; 150).

[0282] In a 239th aspect according to any one of the previous two aspects, said at least one torque transmission element (60) includes one among at least one pin having an elongated shape, and at least one ball.

[0283] In a 240th aspect according to any one of the above, the articulated joint (30; 130) is a homokinetic joint.

[0284] In a 241 st aspect according to any one of the previous aspects, the internal body (50; 150) includes an external surface (51 ; 151), said the external surface (51 ; 151 ) of the internal body (50; 150) extending along a respective ideal spherical surface, said the ideal spherical surface of the internal body (50; 150) defining a respective center of the internal body (50; 150).

[0285] In a 242nd aspect according to any one of the previous aspects, the inner surface (42; 142) of the external body (40; 140) extends along a respective ideal spherical surface, said ideal spherical surface of the external body (40; 140) defining a respective center of the external body (40; 140), said the center of the external body (40; 140) being located inside the inner cavity (41 ; 141 ) of the external body.

[0286] In a 243rd aspect according to any one of the previous two aspects, the center of the internal body (50; 150) coincides with the center of the external body (40; 140) defining a central point of articulation of the articulated joint (30; 130). In a 244th aspect according to the previous aspect, the internal body (50; 150) and external body (40; 140) are angularly mobile with each other solely around said central point of articulation.

[0287] In a 245th aspect according to any one of the previous aspects from the 3rd, the internal surface (142) of the external body (140) includes:

[0288] - a contact articulation surface (143) extending along a respective ideal spherical surface (143a);

[0289] - a torque-transmitting surface (144);

[0290] In a 246th aspect according to any one of the preceding aspects from the 3rd, the internal body (150) comprises an external surface (151 ) including a contact articulation surface (153) extending along a respective ideal spherical surface (153a), wherein the contact articulation surface (153) of the internal body (150) and the contact articulation surface (143) of the external body (140) are in contact with each other and are configured to allow, at least under said operating condition, angular articulation between the external body (140) and the internal body (150).

[0291] In a 247th aspect according to any one of the preceding aspects from the 3rd, the external surface (151 ) of the internal body (150) includes a torque-transmitting surface (154) contacting the torque-transmitting surface (144) of the external body (140) to transmit a maneuvering torque between the internal body (150) and the external body (140).

[0292] In a 248th aspect according to any one of the previous aspects, the locking plug (72), when carried by the internal body (50; 150), crosses said central point of articulation of the articulated joint (30; 130), optionally at least when the locking plug (72) is in the operating position.

[0293] BRIEF DESCRIPTION OF THE DRAWINGS

[0294] Some forms of implementation and some aspects of the invention will be described below with reference to the attached drawings, provided for illustrative purposes only and therefore not limiting wherein:

[0295] - Figure 1 is a perspective view of a floor cleaning device according to the present invention;

[0296] - Figure 2 is a rear perspective view of a floor cleaning device according to the present invention; - Figure 3 is a detailed perspective view of the base portion of a floor cleaning device according to the present invention;

[0297] - Figure 4 is a top view of the base portion of a floor cleaning device according to the present invention;

[0298] - Figure 5 is a perspective view of an articulated joint of the floor cleaning device according to the present invention;

[0299] - Figure 6 is a sectional view of the articulated joint in Figure 5 according to a plane including axis VI and orthogonal to axis VII;

[0300] - Figure 7 is a sectional view of the articulated joint in Figure 5 according to a plane including axis VII and orthogonal to axis VI;

[0301] - Figure 8 is a sectional view of the articulated joint in Figure 5 according to a plane including axis VI and axis VII;

[0302] - Figure 9 is a perspective view of the internal body of the articulated joint of the floor cleaning device according to the present invention;

[0303] - Figure 10 is a perspective view of the external body of the articulated joint of the floor cleaning device according to the present invention;

[0304] - Figure 11 is a perspective view of an external body shell of the articulated joint of the floor cleaning device according to the present invention;

[0305] - Figure 12 is a perspective view of the external body of the articulated joint of the floor cleaning device according to a further embodiment of the present invention;

[0306] - Figure 13 is a perspective view of the external body related to the embodiment of Figure 12 wherein the sphere is shifted relative to its location;

[0307] - Figures 14 and 15 are cross-sectional views of the articulated joint according to the embodiment shown in Figures 12 and 13;

[0308] - Figure 16 is a perspective view of an external body shell of the articulated joint of a floor cleaning device according to an additional embodiment form of the present invention;

[0309] - Figure 17 is a sectional view of the articulated joint according to the embodiment shown in Figure 16;

[0310] - Figure 18 is a perspective view of an articulated joint of a floor cleaning device according to an alternative embodiment form of the present invention;

[0311] - Figure 19 is a sectional view of the articulated joint in Figure 18 according to a plane including the Y axis and Z axis; - Figure 20 is a sectional view of the articulated joint in Figure 18 according to a plane including the X axis and Y axis;

[0312] - Figure 21 is a perspective view of the internal body of the articulated joint according to the alternative embodiment shown in Figures 18-20;

[0313] - Figure 22 is a sectional view of the internal body in Figure 21 according to a plane orthogonal to the Z axis;

[0314] - Figure 23 is a perspective view of an external body shell of the articulated joint of the floor cleaning device according to the alternative embodiment shown in Figures 18-22;

[0315] - Figure 24 is a cross-sectional view of the external body in Figure 23 according to the XXIV plane orthogonal to the torque-transmitting surface of the external body;

[0316] - Figures 25 and 26 are perspective views of a locking mechanism of the articulated joint of a floor cleaning device according to any one of the embodiments previously shown.

[0317] DEFINITIONS AND CONVENTIONS

[0318] Note that in this detailed description corresponding parts illustrated in the various figures are shown with the same numerical references. The figures may illustrate the subject matter of the invention by means of representations that are not to scale; therefore, parts and components illustrated in the figures related to the subject matter of the invention may relate only to schematic representations.

[0319] DETAILED DESCRIPTION

[0320] Floor cleaning device 100

[0321] As shown in the attached figures, a floor cleaning device is collectively denoted by 100.

[0322] The floor cleaning device 100 is a manual conduction device wherein an operator manually moves the device on the floor to perform cleaning operations. During cleaning operations, the operator is positioned at a rear area of the device and grasps a maneuvering handle to guide the device, such as by pushing and / or pulling the device 100 across the floor. In other words, the device 100 of the present invention does not include a driver's seat configured to accommodate the operator: instead, during cleaning operations, the operator stands on the floor and manually handles the device.

[0323] Thus, the 100 device has an overall weight congruent with the need to allow an operator to move it manually in a work area to perform cleaning operations. Device 100 can weigh between 5 kg and 40 kg, or between 10 kg and 30 kg.

[0324] The device 100 includes a maneuvering handle 10 configured to be grabbed by an operator to guide the floor cleaning device along the work area. The maneuvering handle 10 includes a main body 13 extending in length between a first end 10a and a second end 10b along a longitudinal axis HA, as shown in Figure 1 . The extension in length of the maneuvering handle defines the prevailing dimension of the maneuvering handle. The main body 13 may extend in length along said longitudinal axis HA between 50 cm and 150 cm, optionally between 80 cm and 120 cm.

[0325] The main body 13 may include a rod having a substantially rectilinear shape along said longitudinal axis HA and extending between the first end 10a and the second end 10b. The rod may be made of metallic material, such as steel or aluminum, or of plastic or composite material.

[0326] The maneuvering handle may further include a gripping portion 12 configured to be grasped by the operator to guide the floor cleaning device along the work area. The gripping portion 12 is positioned at the first end 10a of the main body 13. The gripping portion 12 may include one or more sections extending transversely from the longitudinal axis HA of the main body 13. For example, the gripping portion 12 may include a first gripping portion, extending from the main body 13 toward a left side of the device, and a second gripping portion, extending from the main body 13 toward a right side of the device. The first and second gripping portions exhibit elongated shapes and may be substantially coaxial with each other.

[0327] The device includes a base portion 20 configured to perform floor cleaning operations. During an operational condition of the device, the base portion 20 is then placed on the floor, while the maneuvering handle extends in height toward the operator moving away from the floor.

[0328] The base portion 20 includes at least one floor cleaning tool, such as a brush 23 facing during an operating condition of the device toward the floor. The cleaning tool may be movable by rotation about its own axis of rotation to facilitate floor cleaning. The cleaning tool may be motorized, that is, connected to an electric motor 24 configured to determine the rotation of the cleaning tool around its own axis of rotation. In one embodiment, the electric motor 24 is carried by the base portion 20. Base portion 20 may include two cleaning tools, such as a first cleaning tool and a second cleaning tool, side by side. The device may be configured to determine the rotation of the first cleaning tool and the second cleaning tool in opposite directions of rotation from each other. For example, the first cleaning tool may be configured to rotate clockwise while the second cleaning tool may be configured to rotate counterclockwise.

[0329] The device may further include at least one activation command, carried by the maneuvering handle, configured to determine activation of the base portion 20 to perform floor cleaning operations. The activation command may be positioned at or near the gripping portion 12 of the maneuvering handle 10. The activation control may include an operator-operable lever or button.

[0330] The cleaning tool may include a fluid injector configured to dispense a fluid onto the floor to assist in floor cleaning operations. In this regard, the device 100 may include a reservoir 14 capable of holding a cleaning fluid connected to the fluid injector to allow it to be dispensed onto the floor.

[0331] The floor cleaning device 100 may include a floor squeegee 80 coupled with a rear portion of the base portion 20 relative to a standard forward direction of the cleaning device. The floor squeegee 80 is then carried by the base portion 20. The floor squeegee includes a squeegee, defining a blade element, facing, during a condition of use of the device, the floor and configured to remove a liquid present on the floor. The squeegee may include a flexible material, such as rubber or silicone, so as to effectively conform to the floor.

[0332] The floor squeegee has an elongated shape along a straight profile or along a curved profile, such as semi-circular. In the case of a curved profile, the concavity of the curved profile faces the cleaning tool and extends for an angular arc between 80° and 160°. The floor squeegee may extend for a length between 20 cm and 80 cm.

[0333] The floor squeegee may be movable between a raised position, wherein the floor squeegee is configured to not contact the floor, and a lowered position, wherein the floor squeegee is configured to contact the floor. Having defined a contact plane of the base portion 20 on the floor, in the raised position the floor squeegee is separated at a distance from said contact plane, for example by a distance of between 5 mm and 100 mm, optionally between 10 mm and 80 mm. In the lowered position, on the other hand, the floor squeegee intersects the support surface.

[0334] Device 100 may include a drive system configured to allow the operator to move the squeegee between the raised and lowered positions.

[0335] The base portion 20 defines, in an operating condition where the base portion 20 is on the floor, a perimeter footprint that projects orthogonal to the floor. The device 100 includes an equilibrium position wherein a center of gravity of the device falls within the perimeter footprint of the base portion 20. In such an equilibrium position, the maneuvering handle 10 extends in height away from the floor substantially along an axis orthogonal ± 10° to the ground.

[0336] Articulated joint 30, 130

[0337] The device 100 may include an articulated joint 30, 130 that connects the maneuvering handle 10 to the base portion 20. The articulated joint 30, 130 is configured to allow relative angular movement between the maneuvering handle 10 and the base portion 20. In other words, the articulated joint 30, 130 is configured to allow a relative angular tilt between the maneuvering handle 10 and the base portion 20. In fact, the articulated joint 30, 130 is configured to allow a relative angular tilt between the longitudinal axis HA of the maneuvering handle 10 and the base portion 20.

[0338] In detail, the articulated joint 30, 130 is configured to transmit a maneuvering torque between the maneuvering handle 10 and the base portion 20. The maneuvering torque provides that an angular rotation of the maneuvering handle 10 about its longitudinal axis HA results in a respective angular rotation of the base portion 20 about its own base axis BA. The BA base axis of base portion 20 is, in an operating condition of the device, orthogonal to the floor plane. Optionally, the BA base axis of the base portion 20 may be parallel to the axis of rotation of the cleaning tool 22 of the base portion 20.

[0339] The articulated joint 30, 130 may be configured to allow angular movement of the maneuvering handle 10 relative to the base portion 20 either about both a first axis X and about a second axis Y, wherein the second axis Y is orthogonal to the first axis X. The articulated joint 30, 130 is configured to allow an angular inclination of the maneuvering handle 10 relative to the base portion 20 in any direction relative to the base portion 20 of an angular displacement greater than 90°, optionally greater than 120° or 150°, optionally where said allowed angular displacement is between 70° and 175°, optionally between 90° and 175°, optionally between 110° and 170°. Said angular inclination is defined between the longitudinal axis HA of the maneuvering handle and a base portion lying plane 20. The base portion lying plane may be defined as parallel to the floor under a condition of device use.

[0340] The articulated joint 30, 130 may define a homokinetic joint or a spherical joint configured to allow torque transmission between drive handle 10 and base portion 20, such that a first angular rotation of drive handle 10 around its longitudinal axis HA corresponds to a respective second angular rotation of base portion 20 around its own base axis BA, wherein the first angular rotation is equal to the second angular rotation.

[0341] The articulated joint 30, 130 can define, in a working condition of the device, a respective footprint perimeter that projects orthogonal to the floor, such that the footprint perimeter of the articulated joint 30, 130 falls outside the footprint perimeter of the base portion 20. The footprint perimeter of the articulated joint 30, 130 can fall behind the footprint perimeter of the base portion 20 according to a standard forward direction of the floor cleaning device 100.

[0342] This text describes below a first embodiment of articulated joint 30 in accordance with Figures 1-17, and a second embodiment of articulated joint 130 in accordance with Figures 18-24.

[0343] Articulated joint 30 according to the embodiment in Figures 1-17

[0344] The articulated joint 30 comprises an outer body 40 comprising an inner cavity 41 and an inner surface 42: the inner surface 42 bounds the inner cavity 41 of the outer body 40. The internal surface 42 of the external body 40 may have a rounded surface, such as a semi-spherical shape; in other words, the internal surface 42 of the external body 40 extends along an ideal spherical surface. In such a case, the inner surface 42 may have a diameter between 3 cm and 15 cm, optionally between 5 cm and 10 cm. In general terms, an envelope of the internal surface 42 of the external body 40 defines an essentially semi-spherical shape. The external body 40 may comprise a first shell and a second shell, distinct from each other, to define, when facing and engaged together, the external body. A shell of the external body 40 is shown in Figures 11 , 13 and 16. In particular, the first shell and the second shell, when engaged together, define the inner cavity 41 : each between the first shell and the second shell includes a respective portion of the inner surface 42 of the external body 40. The portion of the inner surface 42 of the first shell may be substantially equal to the portion of the inner surface 42 of the second shell. Optionally, the first shell and the second shell may be symmetrical to each other or equal to each other.

[0345] The first shell and the second shell of the articulated joint 30 are facing and in contact with each other along a medial plane passing through a center of the spherical shape of the internal surface 42 of the external body 40.

[0346] The external body 40 externally includes a respective external surface that may have a polygonal shape.

[0347] The external body 40 may be made of plastic, composite, or metal materials, such as steel or aluminum, or aliphatic polyamides. In a realizable form, the first shell and the second shell are each made in one piece. Alternatively, external body 40 may be made entirely in one piece.

[0348] The external body includes an articulation opening 46 that allows communication between the inner cavity 41 and the external environment. Articulation opening 46 can lie entirely on a respective plane.

[0349] The external body 40 comprises a coupling portion 45 constrained, or configured to be constrained, to a respective coupling portion 11 of the maneuvering handle 10 or to a coupling portion 21 of the base portion 20. The external body 40 therefore, when constrained to the maneuvering handle, defines a single body with it: similarly, the external body 40, when constrained to the base portion, defines a single body with it. The coupling portion 45 of the external body 40 may be constrained to the base portion or the maneuvering handle by a threaded coupling system, such as by screws.

[0350] The coupling portion 45 of the external body 40 may be opposite the articulation opening 46 to the inner cavity 41 . In other words, the inner cavity 41 of the external body 40 may be interposed between the articulation opening 46 of the external body 40 and the coupling portion 45 of the external body 40. The articulated joint 30 also includes an internal body 50 having an external surface 51 forming at least one recessed channel 53. The internal body is arranged, at least partially, in the inner cavity 41 of the external body 40. The inner cavity 41 of the external body 40 may be counter-formed to the spherical shape of the internal body 50.

[0351] The internal body 50 may have a substantially spherical shape, as shown in Figure 9: in fact, the external surface 51 has a spherical shape contacting the internal surface 42 of the external body 40. In other words, the external surface 51 of the internal body 50 extends over a respective ideal spherical surface.

[0352] Alternatively, internal body 50 may define a multi-faceted solid, wherein one or more, optionally a plurality, of edges and / or vertices of the multi-faceted solid are in contact with the inner surface 42 of the external body 40. The edges and / or vertices of the multi-faceted solid may be rounded, and the inner cavity 41 of the external body 40 also has a rounded shape.

[0353] Alternatively, the internal body 50 may be a cube having edges and / or vertices of the in contact with the inner surface 42 of the external body 40. The edges and / or vertices of the cube may be rounded, wherein the inner cavity 41 of the external body 40 are rounded in shape. In fact, an envelope of the external surface 51 of the internal body 50 defines an essentially spherical shape.

[0354] In particular, the semi-spherical shape of the inner surface 42 of the internal body 40 may be concentric to the spherical shape of the external surface 51 of the internal body, such that the external body 40 and the internal body 50 are angularly movable to each other around a common center, and at the same time axially locked to each other.

[0355] The outer body 40 surrounds the inner body 50 by defining an undercut that prevents relative axial translation between the inner body 50 and the outer body 40, while at the same time allowing angular movement between the inner body 50 and the outer body 40. In fact, the inner cavity 41 of the external body 40 defines an undercut for the internal body 50.

[0356] In an embodiment, the inner surface 42 of the external body 40 may define more than half of a spherical surface, consequently defining an undercut with the inner body 50 arranged in the inner cavity 41 of the external body 40. In such an embodiment, the articulated joint 30 may be realized by arranging the internal body 50 between the first shell and the second shell of the external body 40, when the first shell and the second shell are still separated from each other. A subsequent constraint phase between the first shell and the second shell generates the undercut that constrains the external body to the internal body.

[0357] Internal body 50 comprises a first axis of rotation X, a second axis of rotation Y, and a third axis of rotation Z orthogonal to each other. The first, second and third axes X, Y, Z are therefore integral to the internal body 50. The internal body is movable by rotation about the first axis X relative to the external body 40, and movable by rotation about the second axis Y relative to the external body 40. In turn, the first, second and third axes X, Y, Z are angularly movable with respect to the external body 40. A rotation of the internal body 50 about the third axis Z is configured to cause a corresponding rotation of the external body 40 about a respective axis of rotation Z' of the external body 40, so as to transmit the maneuvering torque between the maneuvering handle and the base portion. Note that the axis of rotation Z' of external body 40 is orthogonal to the floor in a working condition of floor cleaning device 100.

[0358] The third axis Z of internal body 50 intersects the axis of rotation of external body 40 during any angular tilt between internal body 50 and external body 40. Similarly, the third axis Z of the internal body 50 intersects a center point of the internal body 50, and where the axis of rotation Z' of the external body 40 intersects a center point of the inner cavity 41 of the external body 40. In fact, the central point of the internal body 50 coincides with the central point of the external body 40 defining a central point of articulation of the articulated joint 30. In other words, the internal body 50 and the external body 40 are angularly mobile with each other solely around said central point of articulation.

[0359] In an alternative embodiment, the floor cleaning device 100 may include a removably engageable coupling element to the external body 40 to define the undercut between the external body 40 and the internal body 50. Such a coupling element, not shown in the attached figures, may be positioned substantially at the articulation opening 46 of the external body 40. The coupling element may comprise a fork insertable within a recess of the external body 40: the fork, once inserted into the external body, protrudes at least partially within the inner cavity 41 of the internal body 40 to define an undercut between the external body 40 and the internal body 50. Alternatively, the coupling element may include a cover engageable to the external body 40 at the articulation opening 46 and configured to define, when constrained to the external body, an undercut between the external body 40 and the internal body 50.

[0360] The internal body 50 may include an articulating portion 54 housed, optionally entirely housed, within the inner cavity 41 of the external body 40: the articulating portion 54 is configured to allow articulation between the internal body 50 and the external body 40. The articulating portion 54 also determines the constraint between the internal body 50 and the external body 40 to prevent relative axial movements between the internal body 50 and the external body 40. Axial movements may be defined as movements directed along a direction transverse to the internal surface 42 semi-spherical of the external body 40.

[0361] The internal body 50 also includes a coupling portion 55 that is constrained, or configured to be constrained, to a respective coupling portion 11 of the maneuvering handle 10 or to a coupling portion 21 of the base portion 20. The internal body 50 therefore, when constrained to the maneuvering handle, defines a single body with it: similarly, the internal body 50, when constrained to the base portion, defines a single body with it. The coupling portion 55 of internal body 50 may be constrained to the base portion or the maneuvering handle by a threaded connection, such as by screws.

[0362] Coupling portion 55 of internal body 50 emerges from inner cavity 41 of external body 40 through articulation opening 46 of external body 40: the extension of articulation opening 46 allows relative angular movement between internal body 50 and external body 40.

[0363] The internal body 50 includes a bottom 56 portion opposite, with respect to a center of the internal body 50, to the coupling portion 55 of the internal body 50. In other words, the center of internal body 50 is interposed between the bottom 56 portion of internal body 50 and the coupling portion 55 of internal body 50. In other words, the center of the internal body 50, the bottom portion 56 of the internal body 50 and the coupling portion 55 of the internal body 50 may be aligned along a common straight axis.

[0364] The external surface 51 of the internal body 50 includes at least one recessed channel 53, of the type as shown in Figure 9. In one embodiment, the external surface 51 of the internal body 50 may comprise a first recessed channel and a second recessed channel opposite to each other: for example, the first recessed channel may be angularly offset from the second recessed channel by an angle substantially equal to 180° from a center of the internal body 50. In other words, the first recessed channel and the second recessed channel are positioned on the external surface of the internal body 50 such that a straight axis passes through the first recessed channel, the second recessed channel and the center of the internal body 50.

[0365] Alternatively, the external surface 51 of the internal body 50 may include a first recessed channel, a second recessed channel, and a third recessed channel preferably angularly equally spaced.

[0366] Alternatively, the external surface 51 of the internal body 50 may include a first recessed channel, a second recessed channel, a third recessed channel, and a fourth recessed channel preferably equally spaced angularly.

[0367] The term "recessed" indicates the fact that the channel is excavated on the external surface 51 of the internal body 50.

[0368] Each recessed channel 53 comprises a first side wall 53a, a second side wall 53b, and bottom wall 53c interposed between the first side wall 53a and the second side wall 53b. Each recessed channel 53 extends in depth along a radial direction of the internal body 50 between an outer extremal edge 53d and the bottom wall 53c: the bottom wall 53c has a distance from the center of the internal body less than a distance interposed between said center of the internal body and the outer extremal edge 53d of the recessed channel. In other words, the bottom wall 53c is positioned at a depth relative to the external surface 51 of the internal body 50. The depth of each recessed channel 53 of the internal body 50, measured between the bottom wall 53c and the external extremal edge 53d, is between 4 mm and 30 mm or between 6 mm and 15 mm.

[0369] The first side wall 53a and the second side wall 53b may have a substantially flat shape extending between the bottom wall 53c and the extreme outer edge 53d. A distance between the first side wall 53a and the second side wall 53b may be between 5 mm 20 mm, optionally between 6 mm and 15 mm, more optionally between 7 mm and 11 mm. The bottom wall 53c extends in width between the first side wall 53a and the second side wall 53b, along a direction parallel to the distance between the first side wall 53a and the second side wall 53b, according to a straight trajectory. In fact, the bottom wall 53 extends in width between the first side wall 53a and the second side wall 53b in a flat manner. Alternatively, the bottom wall 53c may have an arcuate shape between the first and second side walls 53a, 53b, to define a recessed channel 53 having a profile in a "C" or "II" section.

[0370] Alternatively, the bottom wall 53 may extend in width between the first side wall 53a and the second side wall 53b according to a curved trajectory, for example having a concavity facing outward from the internal body 50.

[0371] The recessed channels 53 of the internal body exhibit elongated shape along a channel trajectory CT directed between the bottom 56 portion of the internal body 50 and the coupling portion 55 of the internal body 50. Each recessed channel 53 extends in length along its own channel trajectory CT between a respective first end and a respective second end, wherein the first end is positioned in the vicinity of the bottom portion 56 of the internal body 50 and spaced apart from the coupling portion

[0372] 55 of the internal body 50, and the second end is positioned in the vicinity of the coupling portion 55 of the internal body 50 and spaced apart from the bottom portion

[0373] 56 of the internal body.

[0374] The channel trajectory CT of recessed channels 53 of internal body 50 is curved. Recessed channels 53 of internal body 50 may present a length along the channel trajectory CT between 3 cm and 12 cm, optionally between 5 cm and 10 cm. Given an internal body 50 having a substantially spherical shape of radius "R," and recessed channels 53 of internal body 50 presenting a length "Lc" along the channel trajectory CT, then:

[0375] 0,7 ■ TT ■ R< Lc < 0,97 ■ IT ■ R.

[0376] In particular, the term "R" means the radius of the spherical surface on which the external surface 51 of the internal body 50 lies.

[0377] Note that the length of the recessed channels 53 of the internal body 50 may be at least twice, and optionally at least three times, the distance between the first wall 53a and the second wall 53b of the recessed channels of the internal body. At least in an angular position between the maneuvering handle 10 and the base portion 20, the channel trajectory CT is orthogonal to a lying plane of the articulation opening 46 of the external body 40.

[0378] Note that each recessed channel 53 of internal body 50 defines its own channel trajectory CT: the trajectories CT of the various recessed channels 53 of internal body 50 have the same shape with each other.

[0379] In an embodiment shown in Figures 1-15, the internal body includes respective recessed channels 53, while the inner surface 42 of the external body 40 has no recessed channels. In particular, the internal surface 42 of the external body 40 shows substantially continuous course.

[0380] In a further embodiment shown in Figures 16 and 17, both internal body 50 and external body 40 include respective recessed channels 53, 43. In such embodiment, the inner surface 42 of the external body 40 includes respective recessed channels 43. The recessed channels 43 of the external body may have similar or the same shape as the recessed channels 53 of the internal body 50. The recessed channels 43 of the external body 40 are deeply excavated on the inner surface 42 of the inner cavity 41 of the external body 40.

[0381] The number of recessed channels 43 of the external body 40 may be equal to the number of recessed channels 53 of the internal body 50. In fact, for each recessed channel 53 of internal body 53 there is a respective recessed channel 43 of external body 40.

[0382] The recessed channels 43 of the external body 40 are facing the respective recessed channels of the internal body 50.

[0383] The recessed channels 43 of external body 40 also exhibit elongated shape along a respective curved extension trajectory. However, the extension in length of the recessed channels 43 of the external body 40 is less than the extension in length of the recessed channels 53 of the internal body 50. For example, the extension in length of the recessed channels 43 of the external body 40 may be half or 1 / 3 of the extension in length of the recessed channels 53 of the internal body 50.

[0384] The extension trajectory of the recessed channels 43 of the external body 40 is directed from a bottom portion of the inner cavity 41 of the external body 40 to the articulation opening 46. In fact, the extension trajectory of the recessed channels 43 of the external body 40 may be orthogonal to the plane of the articulation opening 46 of the external body 40.

[0385] The bottom portion 56 of the inner cavity 41 of the internal body 40 may be close to the coupling portion 45 of the external body 40. Therefore, the bottom portion of the inner cavity 41 of the internal body 40 may be interposed between the coupling portion 45 of the external body 40 and the articulation opening 46 of the external body 40.

[0386] At least in an angular position between the maneuvering handle 10 and the base portion 20, the channel trajectory CT of the recessed channels 53 of the internal body 50 may be parallel to the extension trajectory of the recessed channels 43 of the external body 40.

[0387] The articulated joint 30 also includes at least one torque transmission member 60 positioned between the external body 40 and the internal body 50. Each torque transmission member 60 is configured to transmit maneuvering torque between the maneuvering handle 10 and the base 20, such that an angular rotation of the maneuvering handle 10 about its own longitudinal axis HA results in a respective angular rotation of the base portion 20 about its own base axis BA. At the same time, torque transmission member 60 allows the longitudinal axis HA of maneuvering handle 10 to be tilted with respect to base portion 20 along any direction.

[0388] The torque transmission members 60 emerge inside the inner cavity 41 of the external body and engage the recessed channels 53 of the internal body 50. In fact, torque transmission members 60 protrude within the recessed channels 53 of internal body 50. The torque transmission members 60 comprise an operational portion that is received within a respective recessed channel 53 of the internal body 50: each torque transmission member 60 is movable relative to the internal body 50 along the at least one recessed channel 53 of the internal body 50. In other words, during a tilting phase of the maneuvering handle 10 relative to the base portion 20, the torque transmission members 60 slide within the recessed channels 53 of the internal body 50.

[0389] The at least one torque transmission member 60 may include a first torque transmission member 60' and a second torque transmission member 60' opposed to each other with respect to the body internal body 50. Alternatively, the at least one torque transmission member 60 may include a first torque transmission member 60', a second torque transmission member 60” and a third torque transmission member radially spaced apart from each other, optionally equally spaced apart from each other. Alternatively, the at least one torque transmission member 60 may include three or four or more torque transmission members 60 equi-spaced with respect to each other. In general terms, the articulated joint 30 includes at least as many recessed channels 53 on the internal body 50 as torque transmission members 60.

[0390] In the embodiment shown in Figures 1-15, the torque transmission members 60 are movable relative to internal body 50 and at the same time fixed relative to external body 40. For example, according to the embodiment shown in Figures 1-1 1 , the external body 40 includes, for each torque transmission member 60, a fixing seat 44 fixedly coupled to a support portion of a respective torque transmission member 60. In this case, the torque transmission members 60 are stably attached to the external body 40. The torque transmission member 60 is then interposed between the fixing seat 44 of the external body 40 and the recessed channel 53 of the internal body 50. Optionally, torque transmission members 60 and external body 40 may be made in one piece.

[0391] In the embodiment shown in Figures 1-15, torque transmission member 60 can exhibit elongated shape along respective extension axes EA, to define a pivot. Torque transmission members 60 may extend for a length, from the internal surface of the external body 40, between 4 mm and 20 mm, optionally between 5 mm and 15 mm. Torque transmission members 60 may have a cylindrical shape having a circular cross section with a diameter between 3 mm and 15 mm, optionally between 5 mm and 15 mm. Additionally, the operating portion of torque transmission members 60 may present rounded or spherical shape. The first torque transmission member and the second torque transmission member may be aligned with each other along their respective extension axes EA. In the embodiment shown in Figures 1-15, each torque transmission member 60 is then interposed between the respective recessed channel 53 of the internal body 50 and the respective fixing seat 44 of the external body 40.

[0392] In a further embodiment shown in Figures 12 and 13, the external body 40 includes a recessed seat 48 for each torque transmission member 60: each recessed seat 48 receives a respective support portion of a torque transmission member 60. The recessed seat 48 is positioned in the inner cavity 41 of the external body 40. In the embodiment shown in Figures 12 and 13, the internal body 50 holds the torque transmission member 60 in a stationary position within the recessed seat of the external body 40: however, if the internal body 50 is removed from the inner cavity 41 of the external body 40, the torque transmission member 60 is free to escape from said recessed seat 48 of the external body 40. In the embodiment shown in Figures 12 and 13, each torque transmission member 60 is thus interposed between the respective recessed channel 53 of the internal body 50 and the respective recessed seat 48 of the external body 40.

[0393] In the embodiment shown in Figures 12 and 13, torque transmission member 60 may be a sphere with a diameter between 5 mm and 20 mm.

[0394] Note that during a phase of tilting the maneuvering handle 10 relative to the base portion 20, the operating portion of each torque transmission member 60 always remains positioned within the at least one recessed channel 53 of the internal body 50, whatever the angular movement between the internal body 50 and the external body 40.

[0395] In accordance with any one of the embodiments shown in Figures 1-17, the articulated joint 30 is configured to allow an angular tilt of the maneuvering handle 10 relative to the base portion 20 around both a first axis X and a second axis Y. The first axis X may extend through the at least one torque transmission member 60 and an internal body center 50. The center of the internal body 50 may be the center of the spherical shape of the external surface 51 of the internal body 50 and / or a center of the inner cavity 41 of the external body 40. Optionally, the first axis X may extend through the first torque transmission member 60' and the second torque transmission member 60”. The first axis X is fixed relative to the external body 40. In contrast, the second axis Y may be orthogonal to the first axis X and transverse to the extension axis direction of one or more recessed channels 53 of the internal body 50. In fact, the second axis Y may be orthogonal to the channel trajectory CT. The first axis X and second axis Y define a lying plane that is transverse, and optionally orthogonal, to the extension axis of the one or more recessed channels 53 of the internal body 50. Articulated joint 130 according to the embodiment in Figures 18-24

[0396] The device 100 may include, alternatively to the previously described articulated joint 30, an articulated joint 130 that connects the maneuvering handle 10 to the base portion 20, in accordance with Figures 18-24. The articulated joint 130 is configured to allow for relative angular movement between the maneuvering handle 10 and the base portion 20. In other words, the articulated joint 130 is configured to allow for relative angular movement between the longitudinal axis HA of the maneuvering handle 10 and the base portion 20.

[0397] The articulated joint 130 includes an outer body 140 comprising an inner cavity 141 and an inner surface 142: the inner surface 142 bounds the inner cavity 141 of the outer body 140. The internal surface 142 of the external body 140 may have a rounded surface, such as a semi-spherical shape. In such a case, the inner surface 142 may have a diameter between 3 cm and 15 cm, optionally between 5 cm and 10 cm. In general terms, an envelope of the internal surface 142 of the external body 140 defines a substantially semi-spherical shape.

[0398] The external body 140 may include a first shell and a second shell distinct from each other, defining, when facing and constrained to each other, the external body. In particular, the first shell and the second shell, when engaged together, define the inner 141 cavity: each between the first shell and the second shell includes a respective portion of the internal surface 142 of the 140 external body. The portion of the inner surface 142 of the first shell may be substantially equal to the portion of the inner surface 142 of the second shell. Optionally, the first shell and the second shell may be symmetrical to each other or equal to each other.

[0399] The first shell and the second shell of the articulated joint 130 are facing and in contact with each other along a medial plane passing through a center of the spherical shape of the internal surface 142 of the external body 140.

[0400] The external body 140 externally includes a respective external surface, which may be polygonal in shape.

[0401] The external body 140 may be made of plastic, composite, or metal materials, such as steel or aluminum, or aliphatic polyamides. In an embodiment, the first shell and the second shell are each made in one piece. Alternatively, the external body 140 may be made in one piece. The external body 140 includes an articulation opening 146 that allows communication with the inner cavity 141. In fact, articulation opening 146 places inner cavity 141 of external body 140 in communication with the external environment. The articulation opening 146 may entirely lie on a respective plane.

[0402] The external body 140 includes a coupling portion 145 constrained, or configured to be constrained, to a respective coupling portion 11 of the maneuvering handle 10 or to a coupling portion 21 of the base portion 20. The external body 140 therefore, when constrained to the maneuvering handle 10, defines a single body with it: similarly, the external body 140, when constrained to the base portion 20, defines a single body with it. The coupling portion 145 of the external body 140 may be constrained to the base portion 20 or to the maneuvering handle 10 by a threaded coupling system, such as by screws.

[0403] The coupling portion 145 of the external body 140 may be opposite, with respect to the articulation opening 146, to the inner cavity 141. In other words, the inner cavity 141 of the external body 140 may be interposed between the articulation opening 146 of the external body 140 and the coupling portion 145 of the external body 140. The inner surface 142 of the external body 140 includes a contact articulation surface 143 extending along a respective ideal spherical surface 143a, as shown in Figure 24: this contact articulation surface 143 is configured to contact the outer surface 151 of the internal body 150.

[0404] The inner surface 142 of the external body 140 also includes a torque-transmitting surface 144 configured to transmit the maneuvering torque between the internal body 150 and the external body 140. The torque-transmitting surface 144 of the external body 140 faces the inner cavity 141 of the external body 140: in fact, the torque-transmitting surface 144 of the external body 140 faces the inner cavity 141 of the external body 140.

[0405] The torque-transmitting surface 144 of the external body 140 is contained within the respective ideal spherical surface 143a of the contact articulation surface 143 of the external body 140.

[0406] The torque-transmitting surface 144 of the external body 140 may comprise a first torque-transmitting surface 144' and a second torque-transmitting surface 144" separated from each other. The first torque-transmitting surface 144' and the second torque-transmitting surface 144" of the external body 140 may be opposite to each other with respect to a center of the inner cavity of the external body 140. For example, the first torque-transmitting surface 144' and the second torquetransmitting surface 144" of the external body 140 may be facing each other and optionally parallel to each other. The first torque-transmitting surface 144' and the second torque-transmitting surface 144" of the external body 140 may be angularly offset from each other by 180° with respect to a center of the external body 140.

[0407] A maximum distance between the first torque-transmitting surface 144' and the second torque-transmitting surface 144" of the external body 140 may be less than a diameter of the spherical surface 143a of the contact articulation surface 143 of the external body 140.

[0408] The contact articulation surface 143 of the external body 140 is consecutive to the torque-transmitting surface 144 of the external body 140, such that the contact articulation surface 143 of the external body 140 extends consecutively from one end of the torque-transmitting surface 144 of the external body 140. Note that the contact articulation surface 143 of the external body 140 and the torque-transmitting surface 144 of the external body 140 are directly connected and consecutive to each other.

[0409] The inner surface 142, including the contact articulation surface 143 and the torquetransmitting surface 144, of the external body 140 does not include any protrusions or pins extending into the inner cavity 141. In addition, the inner surface 142, including the contact articulation surface 143 and torque-transmitting surface 144, of the external body 140 does not include any recessed slits. In other words, the internal surface 142 of the external body 140 is convex.

[0410] The torque-transmitting surface 144 of the external body 140 may be, as shown in Figures 23 and 24, flat. In fact, the torque-transmitting surface 144 of the external body 140 may entirely lie on a torque-transmitting plane.

[0411] Alternatively, in an embodiment not shown in the appended figures, the torquetransmitting surface 144 of the external body 140 is curved by defining a cylindrical surface extending along a cylinder axis and having a respective radius of curvature. In the case where the external body 140 includes two torque-transmitting surfaces 144, said torque-transmitting surfaces 144 are substantially equal to each other and have respective cylinder axes parallel to each other. The articulated joint 130 also includes an internal body 150 arranged at least partially in the inner cavity 141 of the external body 140.

[0412] The internal body 150 comprises a first axis of rotation X, a second axis of rotation Y, and a third axis of rotation Z orthogonal to each other. The first, second and third X, Y, Z axes are therefore integral to the internal body 150. The internal body is movable by rotation about the first axis X relative to the external body 140, and movable by rotation about the second axis Y relative to the external body 140. In turn, the first, second and third axes X, Y, Z are angularly movable with respect to the external body 140. A rotation of the internal body 150 about the third axis Z is configured to cause a corresponding rotation of the external body 140 about a respective axis of rotation Z' of the external body 140, so as to transmit the maneuvering torque between the maneuvering handle and the base portion. Note that the axis of rotation Z' of external body 140 is orthogonal to the floor in a working condition of floor cleaning device 100. The axis of rotation Z of the internal body 150 may pass through the connecting portion 155 of the internal body and the bottom portion 156 of the internal body: optionally, the axis of rotation Z of the internal body 150 may be coincident with the axis passing through the connecting portion 155 of the internal body and the bottom portion 156 of the internal body.

[0413] The third axis Z of the internal body 150 intersects the axis of rotation of the external body 140 during any angular tilt between the internal body 150 and the external body 140. Similarly, the third axis Z of the internal body 150 intersects a center point of the internal body 150, and said axis of rotation 71 of the external body 140 intersects a center point of the inner cavity 141 of the external body 140. In fact, the central point of the internal body 150 coincides with the central point of the external body 140 defining a central point of articulation of the articulated joint 130. In other words, the internal body 150 and the external body 140 are angularly mobile with each other solely around said central point of articulation.

[0414] The axis of rotation Y may be defined as orthogonal to torque-transmitting surface 154 of internal body 150. According to this convention, the cylindrical surface of torque-transmitting surface 154 of internal body 150 is straight along the X axis, as shown in Figures 18 and 20. The first axis X may be parallel to the torque-transmitting surface 144 of the external body 140, while the second axis Y may be orthogonal to the torque-transmitting surface 144 of the external body 140.

[0415] The internal body 150 includes a coupling portion 155 constrained, or configured to be constrained, to a respective coupling portion 11 of the maneuvering handle 10 or to a coupling portion 21 of the base portion 20. The internal body 150 therefore, when constrained to the maneuvering handle, defines with it a single body: similarly, the internal body 150, when constrained to the base portion, defines with it a single body. The coupling portion 155 of the internal body 150 may be constrained to the base portion or the maneuvering handle by a threaded connection, such as by screws.

[0416] The coupling portion 155 of the internal body 150 emerges from the inner cavity 141 of the external body 140 through the articulation opening 146 of the external body so as to allow relative angular movement between the internal body 150 and the external body 140.

[0417] Coupling portion 155 ma define a plane substantially parallel to a plane defined by the first axis X and second axis Y of the internal body.

[0418] The internal body 150 comprises an opposite bottom portion 156, relative to a center of the internal body 150, from the coupling portion 155 of the internal body 150. In other terms, the center of the internal body 150 is interposed between the bottom 156 portion of the internal body 150 and the coupling portion 155 of the internal body 150. In still otherterms, a straight axis passes through the center of the internal body 150, the bottom 156 portion of the internal body 150 and the coupling portion 155 of the internal body 150.

[0419] The internal body 150 includes an external surface 151 that includes a contact articulation surface 153 extending along a respective ideal spherical surface 153a, as shown in Figure 22. The contact articulation surface 153 of the internal body 150 and the contact articulation surface 143 of the external body 140 are in contact with each other and are configured to allow, at least in the operating condition of the device, angular articulation between the external body 140 and the internal body 150. Such an angular articulation indicates a change in inclination between the longitudinal axis HA of the maneuvering handle and the base portion: in fact, such an angular articulation indicates a change in inclination between the longitudinal axis HA of the maneuvering handle and the floor in an operative condition of the device.

[0420] The contact articulation surface 153 of the internal body 150 may include a first contact articulation surface 153' and a second contact articulation surface 153". The first contact articulation surface 153' and the second contact articulation surface 153" of the internal body 150 may be opposite to each other. For example, the first contact articulation surface 153' and the second contact articulation surface 153" of the internal body 150 may be angularly offset from each other by 180° with respect to a center of the internal body 150.

[0421] The first contact articulation surface 153' of internal body 150 is in contact with the contact articulation surface 143 of external body 140: similarly, the second contact articulation surface 153' of internal body 150 is also in contact with the contact articulation surface 143 of external body 140.

[0422] The inner body 150 also includes a torque-transmitting surface 154 contacting, as shown in the cross-sectional view of Figure 20, the torque-transmitting surface 144 of the external body 140 to transmit the maneuvering torque between the inner body 150 and the external body 140. The torque-transmitting surface 154 of the internal body 150 faces the outside of the internal body 150. In addition, the torquetransmitting surface 154 of the internal body 150 is contained within the respective ideal spherical surface 153a of the contact articulation surface 153 of the internal body 150.

[0423] The contact articulation surface 153 of the internal body 150 is consecutive to the torque-transmitting surface 154 of the internal body 150, such that the contact articulation surface 153 of the internal body 150 extends consecutively from one end of the torque-transmitting surface 154 of the internal body 150. Note that the contact articulation surface 153 of the internal body 150 and the torque-transmitting surface 154 of the internal body 150 are directly connected and consecutive to each other.

[0424] The torque-transmitting surface 154 of the internal body 150 may comprise a first torque-transmitting surface 154' and a second torque-transmitting surface 154" separated from each other by the contact articulation surface 153. The contact articulation surface(s) 153 of the internal body are interposed between the first torque-transmitting surface 154' and the second torque-transmitting surface 154" of the internal body 150. The first torque-transmitting surface 154' and the second torque-transmitting surface 154" of the internal body 150 may be opposite to each other, i.e., angularly offset 180° from each other with respect to a center of the internal body 150.

[0425] The first torque-transmitting surface 154' of internal body 150 is in contact with the first torque-transmitting surface 144' of external body 140, and the second torquetransmitting surface 154" of internal body 150 is in contact with the second torquetransmitting surface 144" of external body 140.

[0426] A maximum distance between the first torque-transmitting surface 154' and the second torque-transmitting surface 154" of the internal body 150 may be less than a diameter of the spherical surface 153a of the contact articulation surface 153 of the internal body 150.

[0427] The external surface 151 , including the contact articulation surface 153 and the torque-transmitting surface 154, of the internal body 150 does not include any recessed slits. In addition, the external surface 151 , including the contact articulation surface 153 and torque-transmitting surface 154, of the internal body 150 does not include any protrusions or pins extending outward from the external surface 151. In other words, the external surface 151 of the internal body is convex.

[0428] In an embodiment shown in the attached Figures 18-24, the torque-transmitting surface 154 of the internal body 150 may have a curved shape by defining a portion of a cylindrical surface extending along a cylinder axis. Such cylindrical surface belongs to a virtual cylinder having a circular cross section. In fact, such cylindrical surface extends straight along the X axis and along a curved profile along the Z axis, as shown in Figures 18 and 20. In such a realizable form, the torque-transmitting surface 144 of the external body is flat. The cylinder axis of the torque-transmitting surface 154 of the internal body 150 may be parallel to the torque-transmitting plane of the torque-transmitting surface 144 of the external body 140. Optionally, the cylinder axis may be parallel to the plane of torque-transmitting surface 144 of the external body 140 during any angular articulation of the internal body 150 with respect to the external body 140. Note that the cylindrical surface of the torquetransmitting surface 154 of the internal body 150 has a diameter smaller than a diameter of the spherical surface 153a of the contact articulation surface 153 of the internal body 150. In the embodiment shown in the attached Figures 18-24, the internal body 150 includes two of said cylindrical surface portions, distinct and separate from each other, to define two torque-transmitting surfaces 154 of the internal body 150. The two cylindrical surface portions may be opposite to each other such that an axis orthogonally intersects both cylindrical surface portions defining torque-transmitting surfaces 154 of the internal body 150. Each of the two torque-transmitting surfaces 154 of the internal body 150 contacts a respective torque-transmitting surface 144 of the external body 140.

[0429] Note that the first axis X is parallel to or coincides with the cylinder axis of the cylindrical surface of torque-transmitting surface 154 of internal body 150, while the second axis Y is orthogonal to the cylinder axis of the cylindrical surface of torquetransmitting surface 154 of internal body 150.

[0430] Alternatively, in the embodiment form wherein the torque-transmitting surface 144 of the external body 140 is curved, the torque-transmitting surface 154 of the internal body 150 extends along a respective spherical surface: the spherical surface 154a of the torque-transmitting surface 154 of the internal body 150 may have a radius of curvature greater than a radius of curvature of the spherical surface 153a of the contact articulation surface 153 of the internal body 150. In such an embodiment, the radius of curvature of the cylindrical surface of the torque-transmitting surface 144 of the external body 140 may be equivalent to the radius of curvature of the spherical surface 154a of the torque-transmitting surface 154 of the internal body 150. In a sectional view according to a plane orthogonal to the axis of rotation Z of the internal body 150, the torque-transmitting surface 154 and the contact articulation surface 153 of the internal body 150 define an entirely curved and convex perimeter.

[0431] The torque-transmitting surface 154 of the internal body 150 is in contact with the torque-transmitting surface 144 of the external body 140 along a contact line 90. The contact line 90 may be straight or curved, for example defining a section of an ideal circumference. The contact line 90 extends outside the internal body 150, that is, without crossing the internal body 150. The contact line 90 can then be tangent to the external surface 151 of the internal body 150. The torque-transmitting surface 144 of the external body 140 and the torque-transmitting surface 154 of the internal body 150 define, in combination, a geometrically shaped constraint to transmit the shunting torque between the internal body and the external body.

[0432] In the case where the internal body includes two torque-transmitting surfaces 154 and where the external body includes two respective torque-transmitting surfaces 144, the articulated joint defines two respective contact lines 90.

[0433] The torque-transmitting surface 154 of the internal body 150 includes a contact portion 157, and the torque-transmitting surface 144 of the external body 140 includes a respective contact portion 147 contacting the contact portion 157 of the internal body 150. The contact portions 147, 157 of the internal body 150 and the external body 140 substantially have a straight-line shape defining, in combination, the contact line 90.

[0434] Note that, during a first angular movement between the internal body 150 and the external body 140, the contact portion 157 of the torque-transmitting surface 154 of the internal body 150 changes its position on the torque-transmitting surface 154 of the internal body 150. At the same time, the contact portion 147 of the torquetransmitting surface 144 of the external body 140 maintains its position on the torque-transmitting surface 144 of the external body 140. The first angular movement is a rotation of the internal body 150 around the first axis of rotation X.

[0435] In contrast, during a second angular movement, orthogonal to the first angular movement, between the internal body 150 and the external body 140, the contact portion 157 of the torque-transmitting surface 154 of the internal body 150 maintains its position on the torque-transmitting surface 154 of the internal body 150. At the same time, the contact portion 147 of the torque-transmitting surface 144 of the external body 140 changes its position on the torque-transmitting surface 144 of the external body 140. The second angular movement is a rotation of the internal body 150 around the second axis of rotation Y.

[0436] An internal body cross-section 150, shown in Figure 22, is defined as passing through both the contact articulation surface 153 and the torque-transmitting surface 154. The cross section of internal body 150 may pass through or may include contact line 90. The cross section of internal body 150 may also pass through a center of the spherical surface 143a of internal body 150.

[0437] Said cross-section of the internal body 150 defines a convex perimeter edge 159 of the internal body 150, as shown in the cross-sectional view in Figure 22. Said cross section of the internal body 150 includes a curved line of the contact articulation surface 153 of the internal body 150, and a straight line of the torque-transmitting surface 154 of the internal body 150. The straight line connects together a first and a second end of the curved line of the contact articulation surface 153 of the internal body 150.

[0438] Said internal body cross section 150 may define a symmetrical figure. In particular, said internal body cross-section 150 may include a first axis of symmetry coincident with the first axis of rotation X. Said internal body cross-section 150 may include a second axis of symmetry coincident with the second axis of rotation Y. Optionally, said cross section of internal body 150 may include both the first axis of symmetry and the second axis of symmetry of internal body 150.

[0439] It is defined a cross section of external body 140, shown in Figure 20, passing through both contact articulation surface 143 and torque-transmitting surface 144. The cross section of external body 140 may pass through, or include, contact line 90. Said cross section of the 140 external body defines a convex perimeter edge

[0440] 149 of the external body 140, as shown in the sectional view in Figure 20, bounding the inner cavity 141 . Said cross section of the external body 140 includes a curved line of the contact articulation surface 143 of the external body 140, and a straight line of the torque-transmitting surface 144 of the external body 140. The straight line connects together a first and a second end of the curved line of the contact articulation surface 143 of the external body 140. Note that, as shown in the cross- sectional view in Figure 20, the straight line of the cross section of the internal body

[0441] 150 is in contact with the straight line of the cross section of the external body 140. Said external body cross section 140 may define a symmetrical figure. In particular, said cross section of external body 140 may include a first axis of symmetry coincident with the first axis of rotation X. Said external body cross-section 140 may include a second axis of symmetry coincident with the second axis of rotation Y. Optionally, said cross section of the external body 140 may include both the first axis of symmetry and the second axis of symmetry of the external body 140. Locking mechanism 70

[0442] The articulated joint 30 and the articulated joint 130, in accordance with any one of the previously described embodiments, may include a locking mechanism 70 configured to define a locking condition wherein the internal body 50, 150 is in angularly locked, optionally secured, position relative to the external body 40, 140. In the locking condition, the internal body 50, 150 is locked with respect to the base portion 20. The locking mechanism 70 described below is in accordance with any one of the previously described articulated joint 30 embodiments.

[0443] In the locking condition, the maneuvering handle 10 extends in height relative to the floor and away from it. For example, the longitudinal axis HA of the maneuvering handle may be substantially orthogonal to the floor in the locked condition. In the locking condition, the third axis of rotation Z of the internal body may intersect the bottom portion of the external body 40, 140. In detail, in the locking condition, the third axis of rotation Z of the internal body is parallel to the torque-transmitting surface 144 of the external body 140.

[0444] Locking mechanism 70 is enclosed inside external body 40: optionally, locking mechanism 70 may be placed partially or entirely inside internal body 50, 150 and / or inside external body 40, 140.

[0445] Locking mechanism 70 includes a locking socket 71 and locking plug 72 active between internal body 50, 150 and external body 40, 140.

[0446] Locking plug 72 may have elongated shape along a respective axis: locking plug 72 may have a length between 15 mm and 70 mm, optionally between 20 mm and 50 mm. In more detail, the length of locking plug 72 is less than a diameter of external surface 51 , 151 of internal body 50, 150: for example, the length of locking plug 72 may be between 50% and 90% of the diameter of external surface 51 , 151 of internal body 50, 150.

[0447] Locking plug 72 may have an elongated cylindrical shape with a circular crosssection. Alternatively, locking plug 72 may have a polygonal shape with triangular, square, or rectangular cross-section. The locking plug 72 may extend orthogonally to said extension in length for a width between 5 mm and 20 mm, optionally between 8 mm and 15 mm. In the case of a circular cross section, locking plug 72 may be between 5 mm and 20 mm in diameter, optionally between 8 mm and 15 mm. Locking plug 72 may be made of metal material, such as steel or aluminum, or of polymer or composite material. Locking plug 72 may be made in one piece.

[0448] Instead, the locking socket 71 defines a passage opening configured to receive in insertion the locking plug 72. The passage opening of the locking socket 71 may have a shape substantially the same as the cross-sectional shape of the locking plug 72. For example, the passage opening of the locking socket 71 may have a circular shape to define a circular hole. Such a passage opening of the locking socket 71 defines a respective axis that, at least in the locking condition, is parallel to and coincident with the axis of the locking plug 72. In detail, the axis of locking socket 71 may be coincident with the axis of rotation Z' of external body 40, 140.

[0449] The opening of the locking socket 71 has an extension suitable for receiving in insertion the locking plug 72. For example, in the case where the locking socket has an opening having a circular shape, this opening may have a diameter between 5 mm and 20 mm, optionally between 8 mm and 15 mm.

[0450] Locking plug 72 is movable between an operating position and a locking position to define an operating condition and the locking condition of device 100, respectively. In the device operating condition, the locking plug 72 is external to the locking socket 71 , consequently allowing angular articulation between the internal body 50, 150 and the external body 40, 140. In the locking condition, the locking plug 72 is inserted inside the locking socket 71 , consequently locking the internal body 50, 150 to the external body 40, 140. Thus, the locking plug 72 is movable between the operating position and the locking position with respect to both the internal body and the external body.

[0451] In an embodiment shown in the attached figures, the locking socket 71 is formed on the internal surface 42 of the external body 40, while the locking plug 72 is carried by the internal body 50. The locking plug 72 is movable by translation within the internal body 50, 150 between the operating position and the locking position. The locking plug 72 may be movable by translation along a straight translation direction parallel to an axis passing through the coupling portion 55 of the internal body 50 and the bottom portion 56 of the internal body. In particular, the direction of translation of the locking plug 72 may be parallel to or coincident with the third axis of rotation Z of the internal body. In particular, in the locking position, the locking plug 72 protrudes from the external surface 51 , 151 of the internal body 50, 150 toward and within the locking socket 71 of the internal body 40, 140. In the operational position, the locking plug 72 is outside the locking socket 71 and housed at least partially within the internal body 50, without protruding externally from the external surface 51 of the internal body 50. The locking plug 72 may be housed entirely within the internal body 50 when arranged in the operational position.

[0452] Alternatively, in an embodiment not shown in the attached figures, the locking socket 71 is formed on the external surface 51 , 151 of the internal body 50, 150, while the locking plug 72 is carried by the external body 40, 140. The locking plug 72 is then movable by translation within the external body between the operating position and the locking position. In particular, in the locking position the locking plug 72 protrudes from the inner surface 42, 142 of the external body 40, 140 within the inner cavity 41 , 141 of the external body. In the operating position, on the other hand, the locking plug 72 is outside the locking socket 71 and housed inside the external body 40 without protruding, or protruding to a limited extent, into the inner cavity 41 of the external body 40. The locking plug 72 may be fully housed within the external body 40 when arranged in the operating position.

[0453] Note that locking plug 72, when carried by internal body 50, 150, crosses said central point of articulation of articulated joint 30, 130, at least when locking plug 72 is in the operating position.

[0454] The locking mechanism 70 is configured, in the locked condition, to define a stable resting position of the floor cleaning device wherein the floor cleaning device rests on the floor at the base portion 20 and wherein the maneuvering handle 10 extends in height above the base portion 20. In such a stable resting position, the device is balanced on the floor, such that a center of gravity of the floor cleaning device falls within the footprint perimeter of the base portion 20. In the stable resting position, the longitudinal axis HA of the maneuvering handle 10 may be substantially orthogonal to the floor.

[0455] The floor cleaning device 100 includes an actuation mechanism, operatively connected to the locking mechanism 70, configured to switch the locking mechanism 70 between the aforementioned operating condition and the locking condition, and vice versa. The actuation mechanism may be arranged on the maneuvering handle 10 or base portion 20 so as to be operated by an operator's hand or foot. The actuation mechanism is operatively connected to the locking plug

[0456] 72 of the locking mechanism 70 and is configured to move the locking plug 72 between the operating position and the locking position.

[0457] The actuation mechanism may include a release cable 75 operatively connected to the locking plug 72 and configured to pull the locking plug 72 from the locking position to the operating position. The actuation mechanism may also include a lever

[0458] 73 operatively connected to the release cable 75 and configured to be operated by an operator to pull the release cable 75 and move the locking plug 72 between the locked position and the operational position. In detail, lever 73 is configured to move locking plug 72 from the locking position to the operational position.

[0459] The locking plug 72 includes an attachment seat suitable for binding with an end portion of the release cable. The attachment seat defines a slot on the external surface of locking plug 72 and is configured to allow a quick attachment and detachment of the release cable 75.

[0460] The actuation mechanism may also include a stop configured, at the operator's command, selectively to hold locking plug 72 in the operating position, and to release locking plug 72 so as to allow movement of locking plug 72 from the operating position to the locking position. Such a stop is active on locking plug 72 or release cable 75.

[0461] The actuation mechanism may include a spring element 74, such as a spring, active on the locking plug 72 to push the locking plug from the operating position to the locking position. Note that the spring element 74 may push the locking plug 72 in one direction from the operating position to the locking position during both the operating condition and the locking condition. The spring element 74 may be active directly on the locking plug 72 to move the latter from the operating position to the locking position. The spring element 74 may be fully housed inside the internal body 50 or inside the external body 40. In fact, spring element 74 is housed within a body, selected between internal body 50 and external body 40, carrying locking plug 72.

[0462] The spring element 74 may be a coiled spring extending along a respective axis along which the spring is configured to deform. The axis of the spring may be coincident with the axis of the locking plug 72: in fact, the locking plug 72 and the spring may be arranged concentrically with each other.

[0463] In the embodiment wherein locking plug 72 is carried by internal body 50, spring element 74 is interposed between locking plug 72 and a closure stop 76 that may be constrained to internal body 50. The closure stop 76, when constrained to the internal body, defines a stop against which the spring element 74 acts in thrust. The closure stop 76 may be positioned substantially at the coupling portion 55 of the internal body. The closure stop 76 may be constrained to the internal body by a threaded coupling. The closure stop 76 may further comprise a through opening configured to allow the release cable 75 to pass through and be connected to the locking plug 72.

[0464] The actuation mechanism may include, alternately with the release cable, an electric actuator connected to locking plug 72 and configured to move locking plug 72 between the locking position and the operating position. The electric actuator may be configured to move locking plug 72 from the locking position to the operating position and vice versa. The actuation mechanism may also include an actuation lever 73 or knob or foot pedal to control the actuation of the electric actuator. The actuation mechanism may be located on the maneuvering handle 10 or base portion 20.

[0465] ADVANTAGES OF THE INVENTION

[0466] The present invention solves defects and disadvantages peculiar to floor cleaning devices of the state of the art. In particular, it is noted that the presence of recessed channels formed on the internal body, within which the respective torque transmission members slide, allows the torque transmission members to be held in grip within said recessed channels up to high angular inclinations between the maneuvering handle and the base portion. The embodiment wherein the articulated joint includes torque-transmitting surfaces also allows the torque-transmitting members to ensure the transmission of maneuvering torque between the maneuvering handle and the base portion even for high angular inclinations between the maneuvering handle and the base portion. In contrast, state-of-the-art embodiments wherein torque transmission members are attached to the internal body and slide within external body seats / channels have the disadvantage of limited angular inclination between the maneuvering handle and the base portion. In fact, beyond a predefined angular tilt threshold, one or more torque transmission members of the internal body may exit of the channels or seats of the external body. The exit of torque transmission members from the external body may cause the inability to transmit maneuvering torque between the maneuvering handle and the base portion. In addition, exit of torque transmission members from the external body may contribute to breakage, or premature wear, of the articulated joint itself.

[0467] In accordance with the present invention, the presence of the locking mechanism inside the articulated joint makes it possible to reduce space requirements while protecting the locking mechanism itself from external agents, such as dust, sand, soil, and liquids. The fact that the locking mechanism is housed in the articulated joint also helps to protect the safety of the operator, effectively preventing an operator's hand, finger, or foot from interjecting into the mechanism. In contrast, state-of-the-art locking mechanisms are external to the articulated joint and exposed to external agents, which can impair its operation in the short and long term. In addition, the exposure of the locking mechanism in the embodiments of the state of the art greatly reduces the safety of the operator.

Claims

CLAIMS1 . Floor cleaning device (100) including:- a maneuvering handle (10) configured to be grabbed by an operator to guide said floor cleaning device (100);- a base portion (20) provided with at least one floor cleaning tool (22) configured to perform floor cleaning operations;- an articulated joint (130) connecting the maneuvering handle (10) to the base portion (20), said articulated joint being configured, at least in an operating condition, to allow angular movement between the maneuvering handle (10) and the base portion (20), said articulated joint (130) comprising: o an external body (140) comprising an internal cavity (141 ) and an internal surface (142) bounding said internal cavity (141 ), the internal surface (142) comprising:■ a contact articulation surface (143) extending along a respective ideal spherical surface (143a);■ a torque-transmitting surface (144); o an internal body (150) arranged, at least partially, in the internal cavity (141 ) of the external body (140), the internal body (150) comprising an external surface (151 ) comprising:■ a contact articulation surface (153) extending along a respective ideal spherical surface (153a), wherein the contact articulation surface (153) of the internal body (150) and the contact articulation surface (143) of the external body (140) are in contact with each other and are configured to allow, at least in said operating condition, angular articulation between the external body (140) and the internal body (150);■ a torque-transmitting surface (154) contacting the torquetransmitting surface (144) of the external body (140) to transmit a maneuver torque between the internal body (150) and the external body (140).

2. Floor cleaning device according to the preceding claim, wherein the torquetransmitting surface (154) of the internal body (150) faces outside of the internal body (150), and wherein the torque-transmitting surface (144) of the external body (140) faces towards the internal cavity (141 ) of the external body (140).

3. Floor cleaning device according to any one of the preceding claims, wherein the torque-transmitting surface (154) of the internal body (150) is in contact with the torque-transmitting surface (144) of the external body (140) along a contact line (90), said contact line (90) extending on an ideal straight line or ideal circumference, said ideal straight line or ideal circumference of the contact line (90) extending outward from the internal body (150), said ideal straight line or ideal circumference of the contact line (90) not intersecting the internal body (150).

4. Floor cleaning device according to any one of the preceding claims, wherein the internal body (150) comprises a first, second and third axis of rotation (X, Y, Z) orthogonal to each other, and wherein: the internal body (150) is movable by rotation about the first axis (X) relative to the external body (140); the internal body (150) is movable by rotation about the second axis (Y) relative to the external body (140); the first, second and third axes (X, Y, Z) being angularly movable with respect to the external body (140); and wherein a rotation of the internal body (150) about said third axis (Z) results in a corresponding rotation of the external body (140) about a respective axis of rotation (Z1) of the external body (140), wherein the axis of rotation (Z1) of the external body (140) is orthogonal to the floor during a working condition of the floor cleaning device (100).

5. Floor cleaning device according to the preceding claim, wherein the third axis (Z) of the internal body (150) intersects the axis of rotation (Z1) of the external body (140) during any angular inclination between the internal body (150) and the external body (140), and wherein the ideal spherical surface (143a) of the contact articulation surface (143) of the external body (140) defines a center of the external body (140), and wherein the ideal spherical surface (153a) of the contact articulation surface (153) of the internal body (150) defines a center of the internal body (150), and wherein the center of the internal body (150) coincides with the center of the external body (140) defining a central point of articulation of the articulated joint (130), the internal body (150) and external body (140) being angularly movable with each other only around said central point of articulation.

6. Floor cleaning device according to any one of the preceding claims, wherein a cross-section of the internal body (150), passing through both the contact articulation surface (153) and the torque-transmitting surface (154), defines a convex perimeter edge (159) of the internal body (150), and wherein a cross-section of the external body (140), passing through both the contact articulation surface (143) and the torque-transmitting surface (144), defines a convex perimeter edge (149) of the external body (140) bounding the internal cavity (141 ).

7. Floor cleaning device according to any one of the preceding claims, wherein the torque-transmitting surface (144) of the external body (140) is contained within said respective ideal spherical surface (143a) of the contact articulation surface (143) of the external body (140), and wherein the torque-transmitting surface (154) of the internal body (150) is contained within said respective ideal spherical surface (153a) of the contact articulation surface (153) of the internal body (150).

8. Floor cleaning device according to any of the preceding claims, wherein:- the torque-transmitting surface (144) of the external body (140) is flat and lies on a torque transmission plane, and- the torque-transmitting surface (154) of the internal body (150) has a curved shape defining a portion of a cylindrical surface extending along a cylinder axis, said cylinder axis being parallel to said torque transmission plane during any angular articulation of the internal body (150) with respect to the external body (140); or wherein:- the torque-transmitting surface (144) of the external body (140) is curved by defining a cylindrical surface extending along a cylinder axis and having a respective radius of curvature, and- the torque-transmitting surface (154) of the internal body (150) extends along a respective spherical surface, said spherical surface of the torquetransmitting surface (154) of the internal body (150) having a radius of curvature greater than a radius of curvature of the spherical surface (153a) of the contact articulation surface (153) of the internal body (150), wherein the radius of curvature of the cylindrical surface of the torquetransmitting surface (144) of the external body (140) is equivalent to the radius of curvature of the spherical surface (154a) of the torque-transmitting surface (154) of the internal body (150).

9. Floor cleaning device according to the preceding claim, wherein said cylindrical surface of the torque-transmitting surface (154) of the internal body (150) has a diameter smaller than a diameter of the spherical surface (153a) of the contact articulation surface (153) of the internal body (150).

10. Floor cleaning device according to any one of the preceding claims and in combination with claim 4, wherein the torque-transmitting surface (154) of the internal body (150) comprises a contact portion (157), and the torquetransmitting surface (144) of the external body (140) comprises a respective contact portion (147) contacting the contact portion (157) of the internal body (150),and wherein:- during a first angular movement between the internal body (150) and the external body (140): o the contact portion (157) of the torque-transmitting surface (154) of the internal body (150) changes its position on the torquetransmitting surface (154) of the internal body (150), and at the same time o the contact portion (147) of the torque-transmitting surface (144) of the external body (140) keeps its position on the torquetransmitting surface (144) of the external body (140); and- during a second angular movement, orthogonal to the first angular movement, between the internal body (150) and the external body (140): o the contact portion (157) of the torque-transmitting surface (154) of the internal body (150) keeps its position on the torquetransmitting surface (154) of the internal body (150), and at the same time o the contact portion (147) of the torque-transmitting surface (144) of the external body (140) changes its position on the torquetransmitting surface (144) of the external body (140), wherein said first angular movement is around said first axis (X) of the internal body (150), and the second angular movement is around said second axis (Y) of the internal body (150), wherein the first axis (X) is parallel to the torque-transmitting surface (144) of the external body (140), and wherein the second axis (Y) is orthogonal to the torque-transmitting surface (144) of the external body (140).11 . Floor cleaning device according to any one of the preceding claims, wherein:- the torque-transmitting surface (144) of the external body (140) comprises a first torque-transmitting surface (144') and a second torque-transmitting surface (144") separated from each other,the first torque-transmitting surface (144') and the second torquetransmitting surface (144") of the external body (140) being opposite to each other; and- the torque-transmitting surface (154) of the internal body (150) comprises a first torque-transmitting surface (154') and a second torque-transmitting surface (154") separated from each other, the first torque-transmitting surface (154') and the second torquetransmitting surface (154") of the internal body (150) being opposite to each other, and wherein the first torque-transmitting surface (154') of the internal body (150) is in contact with the first torque-transmitting surface (144') of the external body (140), and wherein the second torque-transmitting surface (154") of the internal body (150) is in contact with the second torque-transmitting surface (144") of the external body (140).

12. Floor cleaning device according to the preceding claim, wherein:- a maximum distance between the first torque-transmitting surface (144') and the second torque-transmitting surface (144") of the external body (140) is less than a diameter of the spherical surface (143a) of the contact articulation surface (143) of the external body (140); and- a maximum distance between the first torque-transmitting surface (154') and the second torque-transmitting surface (154") of the internal body (150) is less than a diameter of the spherical surface (153a) of the contact articulation surface (153) of the internal body (150).

13. Floor cleaning device according to any one of the two preceding claims, wherein the first torque-transmitting surface (144') and the second torque-transmitting surface (144") of the external body (140) have a flat shape, and wherein the first torque-transmitting surface (144') and the second torquetransmitting surface (144") of the external body (140) are parallel to each other.

14. Floor cleaning device according to any one of the preceding claims, wherein:- a cross section of the internal body (150) passing through both the contact articulation surface (153) and the torque-transmitting surface (154) includes: o at least one curved line of the contact articulation surface (153) of the internal body (150); and o at least one straight line of the torque-transmitting surface (154) of the internal body (150);- a cross section of the external body (140) passing through both the contact articulation surface (143) and the torque-transmitting surface (144) includes: o at least one curved line of the contact articulation surface (143) of the external body (140); and o at least one straight line of the torque-transmitting surface (144) of the external body (140).

15. Floor cleaning device according to any one of the preceding claims, wherein the articulated joint (130) includes a locking mechanism (70) configured to define a locking condition wherein the internal body (150) is angularly locked in position relative to the external body (140), said locking mechanism (70) being positioned at least partially, optionally entirely, within the internal body (150) or within the external body (140), and wherein said locking mechanism (70) includes a locking socket (71 ) and a locking plug (72) that are active between the internal body (150) and the external body (140), said locking plug (72) being movable between an operating position and a locking position to define respectively:- the operating condition, in which the locking plug (72) is out of the locking socket (71 ) allowing angular articulation between the internal body (150) and external body (140); and- said locking condition, in which the locking plug (72) is inserted within said locking socket (71) to lock the internal body (150) to the external body (140); optionally wherein:- the locking socket (71 ) is formed on the internal surface (142) of the external body (140) and the locking plug (72) is carried by the internal body (150), optionally by the articulation portion (54) of the internal body (150), the locking plug (72) being movable within the internal body (150) between said operating position and said locking position, and wherein: o in the locking position, the locking plug (72) protrudes from the external surface (151 ) of the internal body (150) toward and within the locking socket (71 ) of the external body (140), o in the operating position, the locking plug (72) is out of the locking socket (71 ), the locking plug (72) being housed entirely or at least partially within the internal body (150), optionally without protruding externally from the external surface (151 ) of the internal body (150); or wherein:- the locking socket (71 ) is formed on the external surface (151 ) of the internal body (150) and the locking plug (72) is carried by the external body (140), the locking plug (72) being movable within the external body (140) between said operating position and said locking position, and wherein: o in the locking position, the locking plug (72) protrudes from the internal surface (142) of the external body (140) within the internal cavity (141 ) and within the locking socket (71 ) of the internal body (150), o in the operating position, the locking plug (72) is out of the locking socket (71 ), the locking plug (72) being housed entirely or at least partially within the external body (140) optionally without protruding externally into the internal cavity (141 ) of the external body (140).

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