WO2009133328A1

WO2009133328A1 - Swimming pool vacuum cleaner brush head

Info

Publication number: WO2009133328A1
Application number: PCT/FR2009/050423
Authority: WO
Inventors: Gérard Andrei
Original assignee: Gatech
Priority date: 2008-05-02
Filing date: 2009-03-16
Publication date: 2009-11-05
Also published as: EP2268876A1; FR2930798A1

Abstract

The invention relates to a swimming pool vacuum cleaner brush head (1), comprising a cover (5) cooperating with: a first connector piece (4) of a handle (2) with a rotational joint about a first axis (X₁X'₁) to which an end of said handle can be connected, preferably in a fixed manner, a second connector piece (3) for a suction tube (2), comprising a second tubular end-piece (3₁) opening in a suction opening (7₃) on the bottom face of said cover (5). According to the invention, said second connector piece (3) comprises a joint device (3₂) which is free to rotate, permitting a rotation of the axis (Y₂Y'2) of said second tubular end-piece (3₁) about all axes of rotation called the second axis of rotation, perpendicular to and intersecting the centre (C) of the ball-joint, with the axis (YY') of said suction opening (7₃), such as to permit a variable inclination α₂ of the axis (Y₂Y'₂) of said second tubular end-piece (3₁) with relation to said axis (YY') of the suction opening (7₃) within a cone of apex half-angle (C) α₂ max with a value of at least 20°, preferably at least 30° with relation to said axis (YY') of said suction opening (7₃).

Description

Pool Vacuum Broom Head

The present invention relates to a swimming pool mop head.

More particularly, the present invention relates to a swimming pool mop head having a cover cooperating with:

a first connecting piece of a handle articulated in rotation around a first axis of rotation X ₁ X ₁ perpendicular to the axis Y ₁ Y ₁ of the handle, in a plane perpendicular to said first axis of rotation X ₁ X ^, said first connecting piece preferably comprising a first tubular or semi-tubular endpiece on which is adapted integrally, preferably removably, an end of said handle,

a second connecting piece of a suction pipe, said second connecting piece comprising a second tubular or semi-tubular endpiece at an upper end of which a end of a flexible pipe is integrally adapted in a removable manner; suction, the other end of said suction hose being adapted to be adapted to a water suction port of a side wall of the pool, the open bottom end of said tubular tip opening on a port d suction on the underside of said hood, and

- Said cover preferably supporting on the underside of the brushes and / or ballasting elements, and possibly wheels.

The suction pipes are usually connected to a socket called "broom" on a side wall of the pool.

A vacuum broom of this type can be used to collect grass at the bottom of the pool and possibly on the walls of leaves, small pebbles, coarse particles and other deposits, which are sucked in passing. below the mop head to a suction port on the underside of the mop head, communicating with said flexible suction pipe.

These vacuum cleaner broom heads are manipulated using a handle by a user located high up on the edge of the pool. When the mop head rests on the bottom wall of the pool or on a side wall and the user pushes or pulls on the handle to move the mop head, there is a leverage effect between the mop head and the mop head. point of attachment of the handle at the connecting part of the handle with the mop head and the attachment point of the suction hose at the connection piece between the mop head and the suction pipe.

Indeed, the movements of the flexible suction pipe generated by the displacement of the brush head under the pushing or pulling thereof with the handle, cause a detachment of the brush head on the underside of this one and the suction pipe.

Indeed, the movements of the flexible suction pipe generated by the displacement of the mop head under the thrust or traction thereof with the handle causes a detachment of the mop head on the underside of the suction port tilting relative to the connection point of the handle with the mop head. As a result, the suction of the waste resting on the bottom wall can no longer be done with such efficiency by the distance of the suction port relative to the bottom wall.

One solution to oppose this partial lifting of the broom head relative to the wall of the pool on which it rests, when pushing or pulling the handle and moving the broom head, is to add weighting elements on the underside of the mop head, but this solution is not satisfactory, because the increase in the weight of the mop head makes it more difficult movement with said handle.

In US 4, 61, 5802 and US 5309479, vacuum cleaner broom heads having a hinge joint between the end of the hose are disclosed. water suction hose and the upper face of the hood of the mop head. In these two documents, the hinge joint of the flexible hose is positioned above the upper face of the hood of the brush head, at the upper end of a suction nozzle rising to the sus of the hood and whose lower orifice arrives on the underside of the hood and constitutes the suction opening of the mop head.

The movements of the flexible suction pipe generated by the displacement of the mop head may, in spite of this flexible hinge, cause a detachment of the mop head on the underside of the suction orifice, due to the fact that lever effect created by the tubular tip rising above the hood at the upper end of which is positioned said hinge ball.

In US 4,615,802, the lower orifice of the cylindrical internal cavity of the hinge ball has a diameter greater than the upper orifice of the suction nozzle with which it communicates, which has the effect of affecting suction performance in case of significant rotation of said articulation ball.

In AU 5309479, the mop head has no handle and is able to move automatically through a system of valves obstructing the passage of water in the tubular suction nozzle, the upper end of which is positioned the hinge joint.

The object of the present invention is therefore to provide a new pool vacuum cleaner head that overcomes the disadvantages mentioned above.

To do this, the present invention provides a pool vacuum cleaner head having a cover preferably supporting on the underside bros and / or ballast elements, and possibly wheels, cooperating with: a first connecting piece of a handle articulated in rotation at the level of said cover about a first axis of rotation X ₁ X ₁ perpendicular to the axis Y ₁ Y ₁ of the handle, in a plane perpendicular to said first axis of rotation X ₁ X ^, said first connecting piece preferably comprising a first tubular or semi-tubular endpiece on which fits integrally, preferably removably, an end of said handle,

a second connecting piece of a suction pipe, said second connecting piece comprising a second tubular or semi-tubular endpiece at an upper end of which a end of a flexible pipe is integrally adapted in a removable manner; suction, the other end of said suction hose being adapted to be adapted to a water suction port of a side wall of the pool, the open bottom end of said tubular tip opening on a port d suction on the underside of said hood, suction port whose axis YY 'is preferably perpendicular to the plane of the pool wall on which is intended to rest the cover of the brush head in suction operation, said second connecting piece comprising a rotationally free articulation device adapted to allow a rotation of the Y ₂ Y ₂ 'axis of said second tubular nozzle, at least in a cone of axis YY' perpendicular to the plane on which said brush head rests, said rotary articulation device consisting of a spherical ball joint at the lower end of said second tubular nozzle, said spherical ball being adapted to cooperate in rotation with respect to a concave bearing surface spherical section of said cover in which it is housed and against which it slides in rotation, said spherical ball having an internal cavity in extension of the internal cylindrical cavity of said second tubular nozzle.

According to the invention, the broom head is characterized in that:

said internal cavity of the spherical ball comprises a first lower orifice of larger diameter than the inner diameter of said ball second cylindrical tubular nozzle, said bearing surface having an upper orifice through which extends said second tubular nozzle and a lower orifice corresponding to said suction port on the underside of said hood, of diameter at least equal to that of said first lower orifice, and

said cone has a half-angle at the apex C α ₂ max of at least 20 °, preferably at least 30 °, and whose vertex C of said cone is situated below said second end-piece.

It is understood that said suction port on the underside of said cover is located in height in the immediate vicinity of the plane of the wall on which said cover rests so that the suction is effected effectively.

It is understood that said second tubular nozzle can rotate in rotation with respect to any axis in a perpendicular plane and in intersection at the same point with said axis YY 'perpendicular to the bearing plane of said brush head, and that the Y axis ₂ Y ' _{2 of} said second tubular nozzle may be inclined at a variable inclination of an angle (X ₂ from zero to ± α ₂ max with respect to said axis YY' of said suction orifice and that the top of said cone corresponds to said point d intersection located under or at the bottom of said second tubular nozzle.

By "integrally adapting" is meant here that said handle or respectively the end of said suction pipe follows the suction movements of said first and second connecting pieces respectively.

Said rotary articulation device allows the end of the suction pipe adapted to said second tubular end and then to be subjected to lateral movements during the displacement of the head of the vacuum mop against a wall of the pool, without inducing d lever effect provoking the tilting of said vacuum mop head and therefore without detaching it from the wall, insofar as the free rotation of the second endpiece tubular damping lateral movements of said suction hose and between the two positions of extreme inclination of the ball joint.

According to the invention, the fact that the lower orifice of the concave bearing surfaces, cooperating with the lower orifice of the internal cavity of the ball joint, corresponds to the suction orifice on the underside of the cowl, that is to say, comes close to the plane of the wall on which the broom head rests, makes it possible to limit as much as possible the leverage effect, between the lower peripheral edge of the bonnet and the center of rotation of the ball joint, and therefore to limit the risk of detachment of the hood caused by this leverage when the ball is positioned in greater elevation relative to the suction port on the underside of the hood of the brush head, as in the prior art .

It is understood that the apex of the rotational cone of said second tubular nozzle is located in the center of said spherical ball and said axis YY 'of said cone corresponds to the axis of said suction port and that the axis of inclination Y ₂ Y' _{2 of} said second tubular nozzle with respect to the axis YY 'of said suction orifice is limited in a said cone when the junction zone between said second tubular end and the spherical ball is abutting against the circumference of said upper orifice of said surface concave support.

More particularly, said first axis of rotation X1 X '1 of the handle is located at a height greater than the height of the center C of said spherical ball joint, corresponding to the top of said cone, and more preferably at a height less than that of said first upper orifice of said concave bearing surfaces of spherical section between which said spherical ball joint cooperates in rotation.

This characteristic makes it possible, by actuating the handle, in particular by exerting a thrust on the handle, to react against any detachment of the cover caused by the movements of the suction pipe during the movement of the cover. And, conversely, this respective positioning of said first axis of rotation XlX '1 of the handle and the center of the ball joint spherical helps reduce the risk that a push on the handle does not cause a detach hood.

Preferably, the large diameter of said first lower orifice of the spherical ball is greater than the diameter of the cylindrical internal cavity of said second tubular nozzle so that when said second tubular nozzle is in the maximum inclination position and that the lower part of the patella obstructs a portion of said suction port, the remaining open portion of said suction port has a section greater than or equal to that of said cylindrical internal cavity of the second tubular nozzle.

This characteristic is advantageous so as not to affect the suction flow rate of the water in the tilting position and helps to avoid detachment of the mop head from its bearing surface in the event of rotation of maximum inclination of said patella.

To do this, preferably, the half angle (X ₂ at the top of the rotational cone of said second nozzle is less than 45 °, preferably less than 30 °.

More particularly, the cover comprises a lower cover forming on its upper surface a lower portion of said concave bearing surface, preferably a lower concave bearing surface of semi-spherical section, having a lower orifice corresponding to said suction port. , said lower cover being covered by an upper cover forming an underside of an upper portion of said concave bearing surface, concavity facing downwards, preferably an upper concave bearing surface of semi-spherical section, comprising a said orifice higher, and when said upper cover is positioned above said lower cover, said upper orifice and suction port have the same vertical axis YY 'when said lower cover rests on a horizontal plane. Preferably, said lower concave bearing surface and upper concave bearing surface are of semi-spherical section.

More particularly, the lower cover has on its upper surface near said lower part of said concave bearing surface surrounding said suction orifice, a stirrup on which the lower end of said first connecting piece is adapted to fit. integrally by articulating in rotation with respect to said stirrup about a said first axis of rotation X ₁ XV

Preferably, the first connecting piece comprises a said first tubular end, the upper part of which has an axis Y ₁ Y ^ inclined by an angle (X ₃ with respect to the axis Y ₃ Y ' ₃ of the lower part of said first tubular end, said lower part of said first tubular end having at its lower end a fixing element adapted to cooperate in said rotation relative to said first axis of rotation X ₁ X ^ when it is fixed on said stirrup.

The inclination of the upper part (of an angle α with respect to the lower part) of said first tubular endpiece or said first connecting piece of the handle contributes to reducing the leverage effect resulting from the thrust on the handle and therefore decreases the risk of detaching the bonnet because it helps to reduce the inclination of the handle.

In addition, this inclination of said upper portion of said first tubular nozzle is advantageous because on the one hand it allows the handle to be inclined at a negative angle relative to the horizontal so that its free end can rest on the floor when one wants to store said head of vacuum cleaner on the floor between two uses. On the other hand, this inclination also facilitates the application of said brush head against a vertical wall to be sucked if necessary since this position requires an inclination of said handle close to zero with respect to the vertical or more precisely with respect to plan of said pool side wall that is to be sucked, which would be less easy if said first tubular tip consisted of a single straight cylindrical portion.

More particularly, the first connecting piece is tiltable in rotation so that the Y ₁ Y Y axis of said handle adapted to the upper end of said second tubular endpiece is tiltable by an angle (X ₁ varying at least 25 at 80 ° with respect to a plane of a wall on which said cover rests when the mop head is in suction operation.

More particularly, the upper cover has two first and second ports through which said first and second tubular end of said first and second connecting piece when said upper cover is in position on said lower cover.

Other features and advantages of the present invention will emerge more clearly on reading the following description, given in an illustrative and nonlimiting manner, with reference to the accompanying drawings in which:

- Figure 1 shows a vacuum mop head according to the invention, in perspective.

- Figure 2 is a front view of a vacuum mop head according to the invention with said first connecting piece 4 of the handle (the handle is not shown).

FIGS. 2A, 2B and 2C are sectional views along AA of FIG. 2 with the second connection piece of the suction pipe in vertical position (FIG. 2A) and in the two positions of extreme inclination of the ball joint (FIG. Figure 2B and Figure 2C).

- Figure 3 is a perspective view of sub a broom head according to the invention.

- Figure 4 is a sectional view of a connecting piece of the brush head with a suction pipe. - Figure 5 is a perspective view of a connecting piece of the broom head with a handle.

- Figures 6 and 7 are perspective views of a lower cover 5b (Figure 6) and an upper cover 5a (Figure 7).

- Figures 6A and 7A are longitudinal sectional views of Figures 6 and 7.

The suction mop head 1 of swimming pool comprising a cover 5 cooperating with:

- A first connecting part 4 of a handle 2 rotatably articulated at the cover 5 about a first axis of rotation X ₁ X ^ perpendicular to the axis Y ₁ Y ^ of the handle 1 1, in a perpendicular plane at said first axis of rotation X ₁ X ₁ , said first connecting piece 4 preferably comprising a first tubular or semi-tubular end piece A ₁ on which is adapted integrally, preferably removably, an end of said handle,

a second connecting piece 3 of a suction pipe 2, said second connecting piece 3 comprising a second tubular or semi-tubular end piece 3 _t at an upper end of which is integrally adapted, removably, one end a suction hose 2, the other end of said suction hose being adapted to be adapted to a water suction port of a side wall of the pool, the open bottom end of said mouthpiece tubular opening on a suction port 7 ₃ on the underside of said cover 5, suction port whose axis YY 'is perpendicular to the plane of the pool wall on which is intended to rest the cover 5 of the head of broom in suction operation, and whose plane (of the suction port) is located in the immediate vicinity of said pool wall plane 20.

said cover 5 preferably supporting brushes 9 and / or weighting elements 10 on the underside; Said second connecting part comprises a device 3 _two free articulation in rotation comprising a spherical ball joint 3 ₂ adapted to permit rotation of the Y ₂ Y _'2 of the said second tubular end 3j at least in a YY axis cone 'corresponding to the axis of said suction port 7 ₃ perpendicular to the plane 20 on which said mop head rests, said cone having a half-angle at the apex (X ₂ max of about 20 ° to 30 °, and whose top C of said cone corresponds to the center of said spherical ball joint, said spherical ball joint allows a variable inclination (X _{2 of} said axis Y ₂ Y ' _{2 of} said second tubular end piece 3 _X with respect to said axis YY' of said suction port 7 ₃ in a half-angle cone α ₂ max at top C.

A swimming pool vacuum cleaner head 1 as shown in the figures comprises a cover 5 consisting of a lower cover 5b and an upper cover 5a.

The lower cover 5b supports brushes 9 and weights 10 which are fixed on the underside of the lower cover 5b.

The top of said cone at the center C of the ball is located at a height less than the height of said first axis of rotation X1 X '1, the latter being located on bracket 8 at the upper surface O ₁ of the lower cover 5b.

In a known manner, said brushes 9 can be movable in two different height positions relative to the wall on which said lower cover 5b is intended to rest in suction operation with a low position bros wise and a high position of bros clearance its relative to the wall. In a known manner also the lower cover 5b has a peripheral side skirt 13 with recessed areas 13a so as to allow the passage of water for access under the brush head and access to said suction port which is in slight elevation by relative to the wall of the pool when the lower cover 5b of the broom head rests on it. In its central part on the front side of the lower cover 5b, the upper surface of the lower cover 5b is depressed so as to form a concave surface of half-spherical section I ₁ concavity facing upwards pierced by a central orifice in its bottom, forming the suction port 7 ₃ of the brush head of diameter D ₁ .

The lower periphery of the skirt 13 of the lower cover 5b has support zones or feet 1 1 which slightly elevate the lower orifice 7 ₃ so that the water sucked towards the orifice 7 ₃ and then access it by by an empty space 13a formed between the elevation elements 1 1 of the lower cover 5b. When the lower cover 5b rests on its feet January 1, its upper surface O ₁ is substantially horizontal at the upper circumference 6 ₂ of said semi-spherical concave surface 7 _{1 5} called lower half-spherical concave surface.

In the same central part of the upper surface O ₁ of the lower cover 5b behind the said concave half-spherical surface 7, _the lower cover 5b supports a member forming a stirrup 8 intended to receive a connecting piece called the first connecting piece 4 of the handle 12, articulated in rotation about the axis X ₁ X ^ at said stirrup 8.

The second connecting piece 3 comprises a said second tubular nozzle 3j having a cylindrical cavity of diameter d, the upper end of which is intended to fit into the end of said flexible hinge pipe 2, and whose lower end extends by a spherical ball of the same axis of revolution Y ₂ Y ^ Que that the cylindrical internal cavity of said second tubular end 3j.

The spherical ball 3 is severed at the bottom so as to create a lower orifice 3 ₃ of diameter D (Dj>D> d). The lower orifice 3 ₃ of the spherical ball 3 is arranged axially in the lower part of said second connecting piece 3. Said connecting piece 3 is positioned with the ball in and against said concave bottom half-spherical surface I ₁ such that the lower orifice 3 ₃ of said spherical ball is axially coincident with the suction orifice 7 ₃ delimited by said half-spherical concave surface I ₁ , when said second tubular nozzle 3 _t is positioned perpendicularly to the plane of the lower orifice 7 ₃ , and to the plane of the circumference 6 ₂ of said half-spherical concave surface I ₁ .

The first connecting piece 4 which connects the handle 12 to the broom head, comprises a first semi-tubular endpiece A ₁ constituting its upper part of axis Y ₁ Y ^, extends a second part 4 ₂ also of cylindrical shape, but along an axis Y ₃ Y ' ₃ inclined by an angle (X ₃ of about 20 ° with respect to the axis Y ₁ Y ^ of the first cylindrical portion A _{1 of} said first tubular end 4. cylindrical lower part A _{2 of} said first tubular end 4 is extended by a connecting element 4 ₃ perforated at 4 ₄ so as to be fixed on the stirrup 8, with the two perforations 4 ₄ positioned along said axis X ₁ X ^ denominated first axis of rotation of said first connecting piece 4. The rotational articulation fixing of said first connecting piece 4 on said yoke 8 is such that said first connecting piece can be inclined in rotation with respect to said first axis of rotation X ₁ X ^ at the level of the foreign 8, such that the axes Y ₁ Y ^ and Y ₃ Y ' ₃ have a variable inclination with respect to the plane 20 on which the brush head rests, by rotation in a plane perpendicular to said first axis of rotation X ₁ XV

The inclination of said first connecting piece 4 is such that the axis Y ₁ Y ^ of its upper part A ₁ of tubular tip shape also corresponds to the axis of the handle 12, or an angle (X ₁ relative to the plane of the base of the feet 1 1 or 20 of a wall plane on which the lower cover 5b rests, (X ₁ varying between two extreme positions delimited by a range of at least 20 ° to about 80 °.

As mentioned above, the broom head comprises an upper cover 5a having on its upper surface 5 ₃ a first circular orifice 5 _α and a second substantially rectangular orifice 5 ₂ . Said first circular orifice 5 _α constitutes the upper limit of a concave surface of semi-spherical section I ₂ on the underside of said cover higher 5a. When the upper cover 5a covers the lower cover 5b, with said first tubular nozzle 4 _{1 5} 4 ₂ not passing through the second rectangular opening 5 ₂ and said second tubular end 3 _t of the second connecting piece 3 passing through the first orifice 5 _α of the upper cover 5a, said concave half-spherical surface I ₂ has a concavity facing downwards and abuts against the convex upper surface of half-spherical cross section of the ball joint 3 ₂ exceeding the upper circumference 6 ₂ concave surface of lower half-spherical section I ₁ on which rests the lower part of the swivel 3 ₂ .

The inclination of the axis Y ₂ Y ' ₂ of the second tubular end 3 _X with respect to an axis YY' of the suction port 7 ₃ of angle (X ₂ , may vary from approximately 0 to (X ₂ max = ± 20 ° to 30 °, when the rounding of junction 3 ₄ between the second tubular end 3 _t and the outer surface of the spherical joint 3 ₂ abuts on the diametrically opposite faces of the circumference 5 _α a said first port 5j.

In the maximum inclination positions shown in FIGS. 2B and 2C of said second tubular end piece 3 _t abutting around the periphery of the first orifice 5 _t at the junction 3 ₄ , the end or circumference 3 ₅ delimiting the lower orifice 3 ₃ of the ball 3 ₂ exceeds the concave bottom bearing surface I ₁ and partially obstructs the suction port 7 ₃ .

However, the diameter of the first circular hole 5 _t and the height H ₁ of said concave spherical upper surface 7 ₂ and finally the respective values of the diameters D and d are such that, in the two positions of maximum inclination, the free remaining portion the suction port 7 ₃ section D 'is greater than or equal to d, that is to say, includes a circular area of diameter d, so that the water flow is not affected by the inclination of the patella.

Similarly, the length of the second orifice 5 ₂ is such that the axis YlY'l of the first semi-tubular end A ₁ of the first connecting piece 4 can vary in inclination relative to the plane 20 on which the brush head 1 at an angle (X ₁ ranging from about 80 to 85 ° when the front of the lower portion 4 ₂ of _the tubular fitting 4 ₅ 4 ₂ abuts on the front side of the first opening 5 ₂ of the top cover 5a and (X ₁ is about 20 ° when the rear face of the lower portion 4 ₂ of the first tubular nozzle 4 _{1 5} 4 ₂ abuts on the rear side opposite of the circumference 5 ₂ a second orifice 5 ₂ top cover 5a.

Claims

1. A swimming pool mop head (1) comprising a cover that preferably supports brushes (9) and / or ballasting elements (10) on the underside, and possibly wheels, cooperating with:

- A first connecting piece (4) of a handle (2) articulated in rotation at said cover about a first axis of rotation (X ₁ X ^) perpendicular to the axis (Y ₁ Y ^) of the handle (12) in a plane perpendicular to said first axis of rotation (X ₁ X ^), said first connecting piece (4) preferably having a first tubular or semi-tubular end piece (A ₁ ) on which fits severally, preferably removably, one end of said handle, and

- a second connecting piece (3) of a suction pipe (2), said second connecting piece (3) having a second tubular or semi-tubular end piece (3j) at an upper end of which fits integrally , removably, one end of a suction hose (2), the other end of said suction hose being adapted to be fitted to a water suction port of a side wall of the pool, the lower open end of said tubular end opening on a suction port (7 ₃ ) on the underside of said cover, suction port whose axis (YY ') is preferably perpendicular to the plane of the wall ( 20) on which is intended to rest the cover of the brush head in suction operation, said second connecting piece (3) comprising a device (3 ₂ ) of articulation freely rotatable capable of allowing a rotation of the axis (Y ₂ Y ₂ ') of said second tubular nozzle (3 ^ , at least in a cone of axis (YY ') perpendicular to the plane (20) on which said brush head rests, said rotary articulation device (3 ₂ ) being constituted by a spherical ball joint at the lower end of said second tubular nozzle (3j), said spherical ball being adapted to cooperate in rotation with respect to a concave bearing surface of spherical section (I ₁ , I ₂ ) of said cover in which it is housed and against which it slides in rotation, said spherical ball (3 ₂ ) having a cavity internal extension of the internal cylindrical cavity of said second tubular nozzle (3j),

characterized in that

said internal cavity comprises a first lower orifice (3 ₃ ) of greater diameter (D) than the internal diameter (d) of said second cylindrical tubular end, said bearing surface ⁽ J ₁ J ₂ ) having a first upper orifice ( S ₁ ) through which extends said second tubular nozzle (3 ₂ ) and a lower orifice corresponding to said suction port (7 ₃ ), of diameter (D 1) at least equal to that (D) of said first lower orifice (33) of said patella, and

said cone has a half-angle at the apex (C) α2max of at least 20 °, preferably at least 30 °, and whose apex (C) of said cone is located below said second end-piece.

2. Broom head according to claim 1, characterized in that said first axis of rotation (X1 X '1) of the handle (2) is located at a height greater than the height of the center (C) of said spherical ball joint, corresponding at the top of said cone, and, preferably, at a height less than that of said first upper orifice (5j) of said concave bearing surfaces of spherical section (7 _{1 5} I ₂ ) against which said spherical ball joint cooperates in rotation.

3. brush head according to claim 2 characterized in that said large diameter (D) of said first lower orifice (3 ₃ ) of the spherical ball (3 ₂ ) is greater than the diameter (d) of the cylindrical internal cavity of said second endpiece tubular (3j) such that when said second tubular nozzle is in the maximum inclination position and the lower part (3 ₅ ) of the ball joint obstructs a portion of said suction port (7 ₃ ), the remaining open portion of said suction port (7 ₃ ) has a section (D ') greater than or equal to that of said cylindrical internal cavity of the second tubular nozzle (3j).

4. brush head according to one of claims 1 to 3 characterized in that the half-angle ((X ₂ ) at the top of the cone of rotation of said second nozzle is less than 45 °, preferably less than 30 °.

5. Broom head according to one of claims 1 to 4 characterized in that said cover (5) comprises a lower cover (5b) forming on its upper surface a lower portion (J ₁ ) of said concave bearing surface, referred to as the lower concave bearing surface (J ₁ ), having a lower orifice corresponding to said suction port (7 ₃ ), said lower cover (6) being covered by an upper cover (5) forming an upper part on the underside ( J ₂ ) of said concave bearing surface, concavity facing downward, called upper concave bearing surface (7 ₂ ), comprising an said upper orifice [S ₁ ), and when said upper cover (5a) is positioned above said lower cover (5b), said first upper orifice (S ₁ ) and suction port (J ₃ ) have the same vertical axis (YY ') when said lower cover (5b) rests on a horizontal plane.

6. Broom head according to claim 5 characterized in that said lower concave bearing surface (I ₁ ), and upper concave bearing surface (I ₂ ) are of half-spherical section.

7. Broom head according to claim 5 or 6 characterized in that said lower cover (5b) has on its upper surface near said lower portion (I ₁ ) of said concave bearing surface surrounding said suction port (J). ₃ ), a stirrup (8) on which the lower end of said first connecting piece is adapted to adapt by articulating in rotation relative to said stirrup (8) around a said first axis of rotation (X ₁ X ^).

8. Vacuum mop head according to one of claims 1 to 7 characterized in that said first connecting piece (4) comprises a said first tubular nozzle (A ₁ , A ₂ ) whose upper part (A ₁ ) has an axis (Y ₁ Y ^) inclined by an angle (X ₃ with respect to the axis (Y ₃ Y ' ₃ ) of the part lower part (4 ₂ ) of said first tubular end, said lower part (4 ₂ ) of said first tubular end having at its lower end a fixing element (4 ₃ ) adapted to cooperate in said rotation relative to said first axis of rotation (X ₁ X ^) when it is fixed on said stirrup (8).

9. A brush head according to claim 1 to 8 characterized in that said first connecting piece is tiltable in rotation so that the axis (Y ₁ Y ^) of said handle adapted to the upper end of said second tubular endpiece (4 _{l 5} 4 ₂ ) is inclined at an angle (X ₁ varying at least 25 to 80 ° relative to a plane of a wall (20) on which said cover (5) rests when the broom head is in suction operation.

10. Broom head according to one of claims 1 to 9 characterized in that said upper cover (5a) comprises two first orifice (5 _t ) and second orifice (5 ₂ ) traversed by said first and second tubular nozzle of said first and second connecting piece when said upper cover (5a) is in position on said lower cover (5b).