FR2683745A1 - Hand-held shower unit having multiple jets - Google Patents

Abstract

Hand-held shower unit comprising a handle (1) and a head (2), the lower water-outlet face of which is closed by a diffuser (3) having several groups of orifices (31, 32, 33) connected respectively to a chamber (10, 20, 30) of the diffuser (3), characterised in that the distribution of water towards one or other of these chambers (10, 20, 30) is ensured at the inlet of the head (2), in its prolongation (24) forming the beginning of the handle (1).

Description

MULTI-JET SHOWER
The present invention relates to a shower such as those used in valve assemblies for showers, baths or sinks.

 There are commonly found on the market hand showers designed to offer the user several forms of spray.

 The showers intended to be used in showers and baths generally offer three kinds of jets, a rain jet corresponding to the traditional jet, a massaging jet for which the water comes out of the shower, a shower with great force, and a foaming jet. for which the water is mixed with air, while killing the shower heads for sinks offer a strong iet comparable to the massaging jet and a rain jet generally called a spray.

 In a manner known per se, a shower comprises a handle and a head whose outlet face of the water is closed by a conforming diffuser with outlet orifices for each form of jets. The diffuser forms, with the peripheral wall of the head at the outlet face, chambers communicating respectively with the orifices corresponding to one or the other of the forms of iet. Depending on the desired jet, water is sent to the chamber communicating with the adapted orifices.

 In many bathroom showers, the operating mode is controlled by moving the diffuser in rotation. Such a command is quite difficult to perform since it requires pulling the handle with one hand and turning the diffuser with the other. C1 is why a shower has already been proposed in which the operating mode is controlled by acting on a knob arranged on the handle.

 Such a comforter is very simple and easy to use since one can act on the knob with the hand holding the handle.

 This shower has an axis carrying at each of its ends a pinion and a water distribution plate having a toothed extension.

 The different elements are arranged in such a way that the knurl rotates, by its internal toothed face, a first pinion of the axis, in turn driving the distribution plate by the second pinion.

 The distribution plate has a through opening which is positioned during the rotation of said distribution plate opposite the opening of the chamber communicating with the outlet orifices corresponding to the selected jet.

 This very comfortable shower is very appreciated by the public but has a drawback due to the fact that it is difficult to modify its external shape in order to offer varied models corresponding to the different tastes of the clientele because of the set of pins that it must include.

 The present invention therefore tends to propose a similar hand shower but allowing the modification of its external shape in order to allow the creation of a range of hand showers of various shapes.

 To this end, the invention relates to a multi-jet hand shower comprising a handle and a head, the underside of which leaves the water, is closed by a diffuser having several groups of orifices, intended to produce jets of different shapes, each group of orifices being in connection with a chamber of the diffuser, characterized in that the distribution of the water in the direction of one or the other of these chambers is ensured at the entry of the head, in its extension forming the beginning of the handle.

The shower head according to the invention is also remarkable in that
- the internal space of the head is divided by walls into chambers corresponding to the chambers of the diffuser,
each chamber is in communication with at least one axial duct of said extension of the pad,
- the distribution of water from the internal conduit of the handle to said conduits is made by a distributor,
- said distributor is a plate distributor,
- the distributor is carried by a connecting tail,
- Said connecting tail is shaped at its first end to be fixed in the end of the handle and at its second end to be fixed to the head, said connecting tail having an axial internal bore in its first end communicating with the conduit internal of the handle, this internal bore opening towards the outside of the tail by at least one radial hole,
the distributor is disposed against an external shoulder of the connecting tail formed upstream of said radial holes,
said distributor is formed by three upstream, central and downstream plates engaged by central orifices on the connecting tail,
- the upstream plate is generally cup-shaped with a peripheral wall and a bottom wall,
the central plate has an external diameter greater than that of the upstream plate, and has a peripheral wall, of internal diameter equal to the internal diameter of the peripheral wall of the upstream plate, from which notches are cut, and a plane wall of bottom pierced with an orifice,
the downstream plate is flat and is traversed by orifices intended to be in communication with the conduits of the head,
- the distribution of water to one of the conduits of the head is ensured by rotating the central plate in order to bring the orifice opposite the orifice of the downstream plate corresponding to the conduit of the chosen head, this maneuver being ensured by means of a wheel,
said knurl is generally cylindrical and carries on its external periphery a pusher and has on its internal wall lugs engaging in the notches of the central ring,
orifices and conduits are arranged in double and symmetrically with respect to the diameter passing through the pusher,
- the diffuser is fixed to the head with the interposition of a distribution joint by screwing a fixing screw into a tapped bore in the head,
- Said seal has concentric walls positioned respectively between the walls of the head and the diffuser, said walls defining chambers having orifices connecting the chambers of the head and the diffuser.

 The shower head according to the invention is also remarkable in that it offers a diffusion assembly making it possible to obtain a foaming jet of very good quality.

 The present invention then also relates to a diffusion assembly for a multi-jet hand shower, characterized in that it is formed by a distribution joint, a foam jet ring, a rain jet ring, a massaging jet core and diffuser.

This diffusion set is also remarkable in that
- the seal has, on its face turned towards the head, a chamber communicating with a water supply for
Foaming jet in which are formed orifices at the bottom of which are pierced very small diameter orifices opening into an annular chamber closing the foaming jet chamber of the diffuser on the face of the seal facing towards said diffuser,
the foaming jet ring has on its face facing the distribution joint three sets of orifices distributed circumferentially, non-opening orifices and through orifices arranged in staggered rows with said orifices,
- said through orifices communicate with holes of larger diameter opening into the face of the foaming jet ring facing the diffuser,
a disc of small thickness is placed back from the lower face of said foaming jet ring and is held in the axis of each hole by radial fins,
- said thin patch is flat,
- said thin patch has a concave upper face,
- said thin patch has a convex upper face,
- the foaming jet orifices of the diffuser are surmounted towards the inside of the chamber by collars,
- the seal has, on its face turned towards the head, a chamber communicating with a water inlet for a massaging jet in which are formed massaging orifices,
the said orifices have a section in the shape of a curvilinear rectangle, the two curved sides of which are portions of circles centered on the axis of the joint,
the orifices obliquely pass through the thickness of the seal in order to cause the massaging jet core disposed in the massaging jet chamber of the diffuser to rotate,
the diffuser has on its outer face an L-shaped crown cut out by notches in order to form teeth,
- The rain jet ring is arranged around the crown while being in abutment on the substantially vertical and horizontal faces of said teeth in order to define the rain jet orifices.

The present invention will be better understood from the description which follows with reference to the attached drawing in which:
FIG. L is an axial section view of the shower head according to the invention,
FIG. 2 is a sectional view along line II-II of FIG. 1,
FIGS. 3a and 3b represent respectively in section and in view of the downstream the upstream plate,
- the figures 4a and 4b represent respectively in section and in downstream view the central plate,
FIGS. 5a and 5b respectively show in section and in downstream view the downstream plate,
FIG. 6 is a sectional view of the wheel,
FIG. 6a represents the wheel seen from the downstream,
FIG. 7 is a top view of the distribution joint,
FIG. 7a is a sectional view along line AA of FIG. 7,
FIG. 7b is a partial view in section along the line BB in FIG. 7a,
FIG. 8 is a partial top view of the diffuser,
FIG. 8a is a half-view on a very large scale and in section along line VIII-VIII of Fig. 8,
FIG. 9 is a view of the upper face of the ring for foaming jet,
FIG. 9a is a sectional view along line IX-IX of FIG. 9,
FIG. 10 is a partial view from below of the ring for foaming jet,
FIG. 10A is a sectional view along line XII-XII of FIG. 10,
- Figures lOb and lOc are figures similar to Figure 10a for alternative embodiments of the patch.

 The shower head according to the invention is, as shown in FIG. 1, and in a manner known per se, composed of a handle 1 and a head 2, the lower face of which is closed by a diffuser 3.

 The diffuser 3 comprises several groups of orifices intended to produce jets of different shapes.

 A first group of very small orifices 31 provides the rain spray usually used for showering, these orifices 31 are uniformly distributed over the entire outer circumference of the diffuser 3, as can be seen in FIG. 8 where only three such orifices 31 have been shown to facilitate the drawing.

 A second group of orifices 32 of larger dimensions is arranged along a circle of average diameter of the diffuser 3, these orifices 32 ensure the diffusion of a jet called foaming for which air is mixed with water. .

 A third group of orifices 33 is when it arranged on a small diameter circle of the diffuser 3 and is intended for the supply of a massaging jet exiting with a large force.

 Usually, the diffuser 3 has concentric walls 34, 36, 37 defining above each group of orifices a chamber 10, 20, 30. The chamber 10 for the rain jet is formed outside the external wall 34 of the diffuser 3. The foaming jet chamber 20 is disposed above the foaming jet orifices 32, between the walls 34 and 36. The massaging jet chamber 30 is disposed above the massaging iets orifices 33, between the walls 36 and 37. The internal wall 37 defines an axial bore 38 for the installation of a fixing screw 4.

 A wall 35 extends in the foaming jet chamber 20 and air inlet orifices 39 are arranged circumferentially between the walls 34 and 35 for the supply of air to be mixed with the calf for making foaming spray.

 In known type showers, the diffuser 3 is closed by a cover having orifices intended to communicate respectively with the foaming jet and massaging jet chambers. By rotating the cover around its axis, one can put one or the other of said orifices in communication with the chamber which is linked to it, or water is sent to the chamber 10 formed between the head 2 and the external wall of the diffuser 3. The water coming from the internal conduit 11 of the handle 1 then enters the head 2 of the spray head and is directed towards one of the chambers 10, 20, 30 according to the arrangement of said cover. .

 According to the invention, this distribution of water is ensured largely downstream, ie before the entry of the head, in its extension 24 forming the beginning of the handle.

 To this end, the shower is made in two parts, the handle 1 and the head 2, shown alone in FIG. 2, comprising an extension 24 of the same section as the handle 1, which can be joined to one another.

 The internal space of the head 2 is divided by concentric cylindrical walls 24, 26, 27 into annular chambers 21, 22, 23 of radial size identical to the chambers 10, 20, 30 of the diffuser 3.

 The diffuser 3 is then fixed to the head 2 with the interposition of a distribution joint 9 by screwing the fixing screw 4 into the threaded bore 28 defined in the internal wall 27 of the head.

 In the example shown in the drawing, said seal 9 is of external diameter suitable for its peripheral wall 94 to cooperate with the walls 24 of the head 2 and 34 of the diffuser 3. The seal has orifices 92 connecting the chambers 22 and 20 and at least one orifice 93 connecting the chambers 23 and 30.

 These chambers 21, 22, 23 are respectively in communication with conduits 51, 52, 53 axial of the extension 24 of the head. The conduits 52 pass through the chamber 21 in bosses 54, while the conduits 53 pass through the chamber 22 in bosses 55 visible in FIGS. 1 and 2.

 The distribution of the water coming from the conduit 11 of the handle 1 towards said conduits 51 of rain and 52, of foaming jet and 53 of massaging jet is made by a distributor 5 carried by a connecting tail 6.

 The connecting tail 6 is shaped with a first threaded end 61 for its fixing in the threaded end of the handle 1 and a second threaded end 62 of smaller diameter for its fixing in a threaded orifice 29 of the head 2.

 The connecting tail has an axial internal bore 63 in its first end 61, this internal bore opens towards the outside of the tail 6 by radial holes 64.

 Upstream of said radial holes 64, the connecting tail 6 has an external shoulder 65 against which the distributor 5 is disposed with the interposition of a seal 17.

 The distributor is formed by three upstream, 13 central and 15 downstream plates 13 engaged by central orifices on the external wall of the connecting tail 6.

 The upstream plate 13 shown in FIGS. 3a and 3b is generally in the form of a cup with a peripheral wall 66 and a bottom wall 67.

 The central plate 14 shown in FIGS. 4a and 4b has an external diameter greater than that of the upstream plate 13. This central plate 14 has a peripheral wall 56, of internal diameter equal to the internal diameter of the peripheral wall of the upstream plate 13, in which are cut notches 57. The central plate 14 also has a flat bottom wall 58 pierced with an orifice 59.

 The downstream plate 15 is flat and is traversed by orifices 71, 72, 73 intended to be in communication with the conduits 51, 52, 53 of the head 2. A notch 74 is cut in the periphery of the downstream plate 15 in order to cooperate with a stud 75 of the head 2 to ensure the positioning of the orifices 71, 72, 73 in front of the orifices 51, 52, 53 of the head.

 A seal 16 is disposed between the distributor 5 and the external face of the head 2, this seal 16 has the same conformation as the downstream plate 15.

 As shown in Figure 1, the plates 13, 14, 15 of the distributor 5 are arranged between the shoulder 65 of the connecting tail 6 and the end face of the head 2.

 The upstream plate 13 is arranged with its bottom wall 67 against the shoulder 65 of the connecting tail 6, then the central plate 14 is placed with the free end of its peripheral wall 56 against the peripheral wall 66 of the upstream plate 13 and its bottom wall downstream which defines a chamber 166 in which the water arrives through the radial holes 64 of the connecting tail 6.

 The downstream plate 15 and the seal 16 are then placed against the central plate 15.

 The tail 6 carrying the distributor 5 is screwed by its end 62 into the head 2, taking care to position the notches 74 of the seal 16 and of the downstream plate 15 in line with the stud 75 of said head.

 The opening 59 of the central plate 14 is similar to the orifices 71, 72, 73 of the downstream plate 15.

In order to facilitate the manufacture of the central plate 14, an orifice 59 is formed which opens into the central orifice allowing the positioning of said plate on the connecting tail 6, which gives the shape of a keyhole visible at Figure 4b.

 The distribution of water from the internal conduit 11 of the handle 1 to one of the conduits 51, 52, 53 of the head 2 is ensured by rotating the central plate around the tail 6 in order to bring the orifice 59 opposite the orifice of the downstream plate 15 corresponding to the duct of the chosen head, which allows the passage of water from the radial holes 64 in the chamber 166 towards the chosen duct.

 The operation of said central plate 14 is ensured by a wheel 50 shown in detail in Figures 6 and 6a.

 This wheel 50 is generally cylindrical and carries on its periphery a pusher 80 by which the user can easily drive it in rotation. The outer surface of the wheel 50 has grooves 81.

 The internal wall of the wheel 50 has lugs 87 suitably placed to engage in the notches 57 of the central ring 14 when said wheel 50 is mounted on the end of the head 2.

 The inner wall of the wheel 50 also has grooves 86 intended to cooperate with a boss 76 provided on the end of the head on which the downstream end of the wheel is disposed. These grooves 86 are arranged circumferentially with a pitch identical to that of the orifices 71, 72, 73 of the downstream plate.

 The knurl 50 finally carries a lug 88 diametrically opposite to the pusher 80 and intended to cooperate with stops 78 of the head 2.

 Said knurl 50 is mounted around the distributor 5 by engaging the pins 87 in the notches 57 of the central plate 14. The groove 86 diametrically opposite the pusher 80 is then around the boss 76 of the head 2.

 The assembly of the poiqnée of the shower is then carried out by screwing on the end 61 of the connecting tail 6.

 When the pusher is placed on top of the handle as shown in FIG. 1, the plates 13 to 15 are arranged in the position shown in FIGS. 3b to 5b and the chamber 166 of the distributor 6 is in connection with the conduit 71 of the downstream plate 15 and with the duct 51 of the head which allows water to flow into the chamber 21 of the head in communication with the external rain jet chamber of the diffuser 3.

 If the rotary knob 50 is driven in rotation, a first click is felt when the boss 76 comes out of the groove 86 then a second click when the next groove 86 engages said boss 76.

 In this new position, the orifice 59 of the central plate 14 is disposed opposite an orifice 72 and the water is directed through the conduit 52 towards the chamber 22 of the head and the chamber 20 of the foaming iet of the diffuser.

 If the wheel is again driven in the same direction, the hole 59 of the central plate 14 is brought in front of an orifice 73 leading the water through the conduit 53 to the chamber 23 of the head 2 then the chamber 30 of massage jet from the diffuser.

 The continued rotation of the wheel in the same direction as above is stopped by the abutment of the lug 88 against one of the stops 78 of the head.

 Advantageously, provision is made in duplicate and arranged symmetrically with respect to the diameter passing through the pusher 80, the orifices 72, 73, the conduits 52, 53 and the stops 78 so that the user has the possibility of maneuvering the knob in one way or the other to modify the shape of the jet without changing the operation of its spray. The shower head according to the invention can therefore easily be implemented by any user, whether right-handed or left-handed.

 The hand shower according to the invention is, as we could understand, very easy to operate and makes it possible to avoid many problems arising during the relative rotation of complex parts such as the diffuser because the distribution water is made by the reliable and known operating device that is the plate dispenser. Quite interestingly, the plates can be ceramic plates such as those used in fittings, which makes it possible to significantly increase the life of said dispenser.

 In addition, the distribution of water to the orifices forming the various jets takes place in the handle by a plate distributor 5 leading the water to axial conduits of the extension 24 of the head opening into chambers of said head 2, it is possible to modify the external shape of the hand shower as desired. Indeed, only a cylindrical part for housing the distributor 5 and the conduits 51, 52, 53 of the head is necessary for the proper functioning of the spray. This cylindrical part can quite easily be arranged in a head and a handle having very varied external shapes making it possible to offer customers a very wide range of shower heads.

 The shower head according to the invention can then be proposed in any useful form other than cylindrical, in order to create more ergonomic models than the usual models, or to form a jet more suited to the morphology of the user.

It is possible to apply the teachings of the invention to propose a shower head whose outlet face of the water may not be of revolution, the sets of orifices intended for the formation of the different nets can be arranged according to any
The means ensuring the control of the spray to change the shape of the jet having now been described, we will describe in detail the arrangement of water diffusion shown in this spray and making it possible to obtain particularly interesting massaging and foaming jets.

 The distribution joint 9 comprises, as shown in FIGS. 7 and 7a, concentric walls 94, 96 and 97 intended to be positioned respectively between the walls 24 and 34, 26 and 36, 27 and 37 of the head 2 and of the diffuser 3.

 These walls define annular chambers 122, 123, 138 on the face of said distribution joint 9 facing the head 2.

 For positioning the distribution seal 9 on the diffuser 3, teeth 140 are separated on the upper end of the wall 34 separated by openings 141 which cooperate respectively with openings 142 and teeth 143 formed on the face of the turned seal. towards the diffuser. an annular boss 144 and radial teeth 145 are also provided on the upper end of the wall 37 of the diffuser cooperating with annular 146 and radial 147 grooves of the seal 9.

 We will hereinafter describe the means used for the formation of the foaming jet.

The chamber 122 has orifices 102 regularly distributed circumferentially at the bottom of which are formed the orifices 92 of very small diameter emerging in an annular chamber 120 on the face of the seal 9 facing the diffuser 3, said chamber 120 of the
Seal closing the chamber 20 of the diffuser 3.

 In the chamber 20 of the diffuser, there is between the walls 35 and 36, a foaming jet ring 150 shown in Figures 9, 9a, 10, 10a.

 This ring 150 has on its upper face facing the distribution joint 9 three sets of orifices regularly distributed circumferentially in three circles of different diameters.

 The orifices 151 and 152 arranged on the inner and outer circles are radially in correspondence. These holes are not through, Figure 9a.

 The orifices 153 situated on the middle circle are of a diameter greater than that of the orifices 151 and 152 and are arranged in staggered rows with said orifices 151 and 152.

 These orifices 153 (FIG. 10) open into holes 154 of larger diameter opening into the underside of the foaming jet ring 150 facing the diffuser 3.

 Set back from the underside of said ring, a thin disc 155 is held in the axis of each hole 154 by radial fins 156.

 In the example shown, these fins 156 extend over the entire height separating the pellet 155 from the bottom of the hole 154 and are four in number. it is of course possible to provide different fins by their shape or their number.

 The thin pad placed in the hole 154 can, as shown in FIG. 10a, be a flat pad.

 As a variant, in order to adapt the characteristics of the foaming iet as a function of the desired qualities, said thin pad may have a concave upper face, pad 165 of the shape 10b, or a convex upper face, pad 175 of FIG. 10c.

 The foaming jet ring 150 is arranged so that the orifices 153 are disposed above the orifices 32 of the foaming iet of the diffuser by the cooperation of a tooth 159 which it carries on its internal periphery and of a groove 149 of the wall 37 of the diffuser 3.

 The orifices 32 of the foaming iet of the diffuser 3 are surmounted towards the inside of the chamber 20 by internally chamfered collars 132.

 As can be seen in FIG. 1, the foaming jet tank 150 is disposed against the walls 35 and 36 of the diffuser with its lower face bearing on the upper end of said collars 132. The holes 154 of said ring have a diameter equal to the diameter from the end of said collars.

 By implementing the diffusion assembly according to 1 invention formed by the distribution joint 9, the foaming jet ring 150 and the diffuser 3, a good quality foaming jet is obtained.

 In fact, the water is firstly set in motion by its passage through the stepped orifices 102, 92 before opening into the upper part of the chamber 20 left free above the foaming jet ring 150.

 In this upper part of the chamber 20, air is admitted by suction through the orifices 39 arranged circumferentially.

 The water and the air which it entails then abut on the foaming jet ring 150 and are mixed by the presence of the non-opening orifices 151 and 152 and by their passage through the orifices 153 opening into the holes 154 opposite the pellets. 155 forming new obstacles.

 The number of obstacles encountered by water and air before their arrival in the orifices 32 of foaming jet of the diffuser 3 makes it possible to obtain a good air-water mixture.

 We will now describe the means used for the distribution of the massage jet.

 In the example shown, two mass spray holes 93 are provided in the distribution joint 9 arranged in a chamber a

 These orifices 93 are diametrically opposite.

 Said orifices 93 have a section in the shape of a curvilinear rectangle, the two curved sides of which are portions of circles centered on the axis of the joint 9.

 The orifices 93 pass obliquely through the thickness of the seal 9 as shown in FIG. 7b.

 Bosses 148 are formed on the face of the seal facing the diffuser 3 between said orifices 93. The dimensions of these bosses 148 are provided in order to modify the volume of the massaging jet chamber 30 with a view to obtaining a jet of good quality.

 In the massaging jet chamber 30 of the diffuser 3, a core 130 is put in place, the cylindrical lateral faces of which are disposed at a short distance from the walls 36 and 37 surrounding said chamber 30. The core is a little less in height than the height of the chamber 30 and extends circumferentially over approximately 900.

 The water coming from the chamber 23 of the spray head 2 passes through the distribution joint through the oblique orifices 93 and then drives the core 130 in rotation in the chamber 30 which accelerates the water and the laminate towards the orifices 33, thus giving it significant strength.

 The diffuser shown in the drawing presents on the external face of the wall 34 a crown 11 with an L-shaped section cut out by notches 121 in order to form teeth 122. A ring 131 is placed around the crown 111 while being supported on the faces substantially vertical and horizontal of said teeth.

 The rain spray orifices 31 are thus formed by the substantially vertical portion of the notches 121 disposed between the ring 131 and the wall 34.

 Advantageously, the ring 131 is made of a flexible material such as that forming the distribution seal 9 and will be obtained by molding at the same time as said seal by being arranged concentrically around said seal.

Claims (29)

 1. Multi-jet hand shower comprising a handle (1) and a head (2) whose underside of water outlet is closed by a diffuser (3) having several groups of orifices (31, 32, 33), intended to produce jets of different shapes, each group of orifices (31, 32, 33) being in connection with a chamber (10, 20, 30) of the diffuser (3), characterized in that the distribution of the water in the direction of one or other of these chambers (10, 20, 30) is provided at the entrance to the head (2), in its extension (24) forming the start of the handle (1).  2. Shower head according to claim 1, characterized in that the internal space of the head <2> is divided by walls (24, 26, 27) into chambers (21, 22, 23) corresponding to the chambers (10, 20 , 30) of the diffuser (3).  3. Shower head according to claim 2, characterized in that each chamber (21, 22, 23) is in communication with at least one conduit (51, 52, 53) axial of said extension (24) of the head.  4. Shower head according to claim 3, characterized in that the distribution of water from the internal conduit (11) of the handle (1) to said conduits (51, 52, 53) is made by a distributor (5) .  5. Shower head according to claim 4, characterized in that said distributor (5) is a distributor (5) with plates.  6. Shower head according to one of claims 4 or 5, characterized in that the distributor (5) is carried by a connecting tail (6).  7. Shower head according to claim 6, characterized in that said connecting tail (6) is shaped at its first end (61) to be fixed in the end of the handle (1) and at its second end (62) for be fixed to the head (2), said connecting tail (6) having an axial internal bore (63) in its first end (61) communicating with the internal conduit (11) of the handle (1), this internal bore opening out towards the outside of the tail (6) by at least one radial hole (64).  8. Shower head according to claim 7, characterized in that the distributor (5) is disposed against an external shoulder (65) of the connecting tail (6) formed upstream of said radial holes (64).  9. Shower head according to any one of claims 5 to 8, characterized in that said distributor is formed by three plates (13, 14, 15) upstream, central and downstream engaged by central orifices on the connecting tail (6) .  10. Shower head according to claim 9, characterized in that  the upstream plate (13) is generally cup-shaped with a peripheral wall (66) and a bottom wall (67),  the central plate (14) has an external diameter greater than that of the upstream plate (13), and has a peripheral wall (56), of internal diameter equal to the internal diameter of the peripheral wall (66) of the upstream plate ( 13), in which are cutouts of the notches (57), and a flat wall (58) at the bottom pierced with an orifice (59),  - The downstream plate (15) is flat and is traversed by orifices (71, 72, 73) intended to be in communication with the conduits (51, 52, 53) of the head (2).  11. Shower head according to claim 10, characterized in that the distribution of water to one of the conduits (51, 52, 53) of the head (2) is ensured by rotating the central plate (14) in order to d 'Bring the orifice (59) opposite the orifice of the downstream plate (15) corresponding to the duct of the head chosen, this maneuver being ensured by means of a knob (50).  12. Shower head according to claim 11, characterized in that said wheel (50) is generally cylindrical and carries on its outer periphery a pusher (80) and has on its internal wall lugs (87) engaging in the notches (57 ) of the central ring (14).  13. Shower head according to claim 12, characterized in that orifices (72, 73), and conduits (52, 53) are arranged in double and symmetrically with respect to the diameter passing through the pusher (80).  14. Shower head according to any one of the preceding claims, characterized in that the diffuser (3) is fixed to the head (2) with the interposition of a distribution joint (9) by screwing a fixing screw (4 ) in a tapped bore (28) in the head.  15. Shower head according to claim 14, characterized in that said seal (9) has concentric walls (94, 96, 97) positioned respectively between the walls (24, 34; 26, 36; 27, 37) of the head ( 2) and of the diffuser (3), said walls (94, 96, 97) defining chambers (122, 123) having orifices (92, 93) connecting the chambers (22, 20 23, 30) of the head (2) and the diffuser (3).  16. Diffusion assembly for a multi-jet hand shower, characterized in that it is formed by a distribution joint (9), a foam jet ring (150), a rain jet ring (131) , a massaging jet core (130) and a diffuser (3).  17. Diffusion assembly according to claim 16, characterized in that the seal (9) has, on its face facing the head (2), a chamber (122) communicating with a water inlet for foaming jet in which are formed of orifices (L02) at the bottom of which are pierced orifices (92) of very small diameter opening into an annular chamber (120) closing the foaming jet chamber (20) of the diffuser (3) on the face of the seal (9) facing towards said diffuser (3).  18. Diffusion assembly according to any one of claims 16 or 17, characterized in that the foaming jet ring (150) has on its face facing the distribution joint (9) three sets of orifices distributed circumferentially, non-opening holes (151, 152) and through holes (153) staggered with said holes (151, 152).  19. Diffusion assembly according to claim 18, characterized in that said through holes (153) communicate with holes (154) of larger diameter opening in the face of the foaming jet ring (150) facing the diffuser (3 ).  20. Diffusion assembly according to claim 19, characterized in that a thin pellet (155, 165, 175) is set back relative to the underside of said foaming jet ring and is held in the axis of each hole (154) by radial fins (156).  21. Diffusion assembly according to claim 20, characterized in that said thin pad (155) is planar.  22. Diffusion assembly according to claim 20, characterized in that said thin patch (165) has a concave upper face.  23. Diffusion assembly according to claim 20, characterized in that said thin patch (175) has a convex upper face.  24. Diffusion assembly according to any one of claims 16 to 23, characterized in that the orifices (32) of foaming jet of the diffuser (3) are surmounted towards the interior of the chamber (20) by collars (132 ).  25. Diffusion assembly according to any one of claims 16 to 24, characterized in that the seal (9) has, on its face facing the head (2), a chamber (123) communicating with a water inlet for a massaging jet in which massaging jet orifices (93) are formed.  26. Diffusion assembly according to claim 25, characterized in that said orifices (93) have a section in the shape of a curvilinear rectangle, the two curved sides of which are portions of circles centered on the axis of the joint (9).  27. Diffusion assembly according to claim 26, characterized in that the orifices (93) pass obliquely through the thickness of the seal (9) in order to rotate the massaging jet core (130) disposed in the massaging jet chamber. (30) of the diffuser (3).  28. Diffusion assembly according to any one of claims 16 to 27, characterized in that the diffuser (3) has on its external face a crown (11) with an L-shaped section cut by notches (121) in order to form teeth (122).  29. Diffusion assembly according to claim 28, characterized in that the ring (131) of rain jet is arranged around the crown (111) while being in abutment on the substantially vertical and horizontal faces of said teeth in order to define the orifices ( 31) rain spray.