JP5891528B2 - Shower water discharge device - Google Patents

Description

  The present invention relates to a shower water discharge device, and more particularly to a shower water discharge device that discharges shower water intermittently in a pulse shape from a shower hole.

2. Description of the Related Art Conventionally, a shower water discharge device that discharges shower water in a pulse shape from a shower hole by intermittently blocking and opening the shower hole is known.
Conventionally, in this type of shower apparatus, an impeller that rotates around an axis based on the fitting of a plurality of shower holes provided in a water spray plate and a cylindrical portion that is rotatably fitted to the axis. The water from the upstream part, the passing water is made to collide with the blades of the impeller as a jet water flow, and the water jet member that rotates the impeller and a predetermined circumferential length extending along the inner surface of the water spray plate A shower hole blocking portion provided in the span impeller and rotating around the axis by rotation of the impeller, and intermittently blocking and opening the shower hole with the rotation, the shower hole blocking portion The shower water is discharged in a pulsed manner based on intermittent blocking and opening of the shower hole.

  In this type of shower water discharge device that discharges the shower water in a pulse shape, if the shower holes are arranged side by side on the circumference, the shower arranged on the circumference in accordance with the rotational movement of the shower hole blocking section The pores can be blocked and opened sequentially and continuously, so that the shower water is discharged from the shower holes not blocked by the shower hole blocking portion over a wide angle range. It is desirable to be able to realize water discharge.

By the way, in this case, a shower hole having an upper end opening located in a space between blades adjacent to each other in the circumferential direction, and a shower hole having an upper end opening located in a hidden position just below the blades. Will always occur.
In this case, the water in the space between the blades can be smoothly discharged to the outside through the shower hole in which the opening at the upper end is located in the space, but the opening at the upper end is hidden behind the blade. It is difficult for the water to be smoothly discharged to the outside through the shower hole located at a certain position, so that the water in the space tends to spill there.
In this case, the pressure of water in the same space becomes a resistance to rotation with respect to the impeller, which causes a problem that the impeller does not rotate smoothly and stably, and it becomes difficult to smoothly discharge the shower water in a pulsed manner. .

In addition, there exists what was disclosed by the following patent document 1 as a prior art with respect to this invention.
FIG. 16 shows a specific example thereof.
In FIG. 16A, reference numeral 200 denotes a shower head, and 202 denotes a shower water discharger that intermittently discharges shower water in a pulsed manner.
In the one disclosed in Patent Document 1, hot water passes through a spiral water passage 206 provided in the flow path switching mechanism 204 shown in FIG. 208 is rotated, and the bottom plate (shower hole blocking portion) 212 of the impeller 208 intermittently blocks and opens the water passage 216 provided in a spot manner in the circumferential direction at the bottom of the sprinkling portion 214, thereby discharging shower water. The shower water is discharged from the unit 202 in a pulsed manner.

However, in the case of the shower water discharge device disclosed in Patent Document 1, when the space between the blades 210 and 210 adjacent to each other in the circumferential direction is at a position deviated in the circumferential direction from the water passage 216 provided in a spot manner, The water in the space cannot escape to the outside through the water passage 216 and the shower water discharger 202, and the water is trapped in the space to generate the squeezing pressure. The above-mentioned problem is inherent in the point of inhibiting rotation.
Moreover, in the case of this shower water discharging apparatus, the shower water discharging part 202 which discharges shower water in a pulse form is not what arranged the shower hole side by side on the circumference.

JP 2003-38378 A

  The present invention has been made for the purpose of providing a shower water discharge device that can ensure smooth and stable rotation of an impeller and can discharge shower water in a pulsed manner, against the background of the above circumstances. Is.

Thus, the first aspect of the present invention is based on the fitting of (a) a plurality of shower holes provided in the water spray plate, and (b) a shaft and a tubular portion rotatably fitted to the shaft. An impeller that rotates around an axis; and (c) a water jet member that allows water from the upstream portion to pass through, causes the passing water to collide with the blades of the impeller as a jet water flow, and rotationally drives the impeller. d) It is provided in the impeller over a predetermined circumference in a form extending along the inner surface of the watering plate, and rotates around the axis by the rotation of the impeller, and the shower hole is intermittently connected with the rotation. A shower hole blocking unit that blocks and opens the shower hole, and discharges shower water from the shower hole, wherein the opening at the upper end of the shower hole that opens at the inner surface of the water spray plate is formed on the shaft. And arranged side by side on the circumference centered on the axis, and the opening at the upper end of the shower hole Flip grooves are provided is a circumferential width on the inner surface of the diverging water plate is constant in the radial position, or to position the opening of the upper end to the bottom of the groove, or / and, the shower plate in the impeller A portion located at the same radial position as the opening at the upper end of the shower hole at a lower portion on the inner surface side of the shower hole is circumferentially cut out with a certain width so that the opening at the upper end and the impeller A partially enlarged gap that communicates each space formed between the blades adjacent to each other in the circumferential direction and the opening at the upper end in the circumferential direction. The inner surface of the water spray plate at a radial position different from the radial position where the gap between the inner surface of the water spray plate and the lower portion of the impeller is provided with the circumferential groove or / and the notch. characterized in that the are the size Kunashi relative gap between the lower portion of the impeller.

Effects and effects of the invention

  As described above, the present invention arranges the opening at the upper end of the shower hole side by side on the circumference, and provides a circumferential groove on the inner surface of the water spray plate at the same radial position as the opening at the upper end. By positioning the opening at the upper end of the shower hole on the bottom surface, or / and by cutting out the same radial direction as the lower part of the water spray plate side and the opening at the upper end of the shower hole in the impeller circumferentially, A partially enlarged gap between the opening at the upper end and the impeller that connects each space formed between the blades adjacent to each other in the circumferential direction and the opening at the upper end of the shower hole in the circumferential direction. Is formed.

  In the present invention, the openings at the upper ends of the shower holes are arranged side by side on the circumference, so that the shower hole blocking part discharges shower water over a wide angle range with the rotational movement of the shower hole blocking part. In addition to being able to realize the pulsed water discharge of the shower water by blocking and opening the shower hole by the above, the following advantages are obtained.

In the present invention, water in the space can be discharged (released) through a shower hole in which the upper end opening is located at a position in the space formed between the blades adjacent in the circumferential direction. Not only can the water in the same space be passed through a partially enlarged gap formed by a circumferential groove or notch into a shower hole where the top opening is located in a hidden position below the blade. Since it can be made to wrap around and be discharged to the outside, it is possible to prevent water from flowing into the space between the blades and generating squeezing pressure there.
As a result, the impeller can be rotated smoothly and stably, and the shower water can be discharged in a pulsed manner.

If the impeller is simply rotated smoothly, it can be realized by disposing the impeller itself so as to be separated from the inner surface of the water spray plate.
However, in this case, the gap between the lower end of the blade and the inner surface of the water spray plate becomes larger, and the gap between the shower hole blocking portion and the inner surface of the water spray plate also becomes larger. A large amount of water leaked in the circumferential direction from the space between the blades through the gap between them flows into the gap between the shower hole blocking portion and the inner surface of the water spray plate, and is located below the shower hole blocking portion. It is discharged outside through the shower hole.
If it becomes such, a shower hole will not be interrupted | blocked favorably by a shower hole interruption | blocking part, and the pulse-like water discharging function of shower water will be impaired.

  In order to prevent this, in the present invention, the impeller is provided so that the impeller blade and the shower hole blocking portion are located as close as possible to the inner surface of the water spray plate, and then the circumferential groove or It is desirable to provide a notch so that the water in the space between the blades is caused to circulate in the circumferential direction.

  By doing so, it is possible to effectively prevent leakage of water from the shower hole in the blocked state by the shower hole blocking unit, and to perform pulsed water discharge of the shower water satisfactorily.

It is the figure which showed the shower head provided with the shower water discharging apparatus of one Embodiment of this invention. It is the figure which showed the internal structure of the shower head of FIG. It is the figure which expanded and showed the principal part of FIG. (A) It is an AA view of FIG. (A) It is the II view figure of FIG. (C) It is a Wu view of FIG. FIG. 3A is an air view in FIG. (B) It is a perspective view of the rotary body of FIG. 5 (A). It is the figure which decomposed | disassembled and showed the component of the 1st pulse shower mechanism of FIG. It is the figure which showed the rotary body of FIG. 6 in the different direction. It is the figure which showed the guide groove of the watering board inner surface of FIG.2 and FIG.6. It is the disassembled perspective view which decomposed | disassembled and showed each component in the same embodiment. It is the figure which showed the impeller of FIG. It is the perspective view which expanded and showed the principal part of the nozzle sheet presser of FIG. (A) It is the figure which showed the shape of the upper surface of the bottom part of the nozzle sheet presser in FIG. (B) It is the figure which showed the shape of the lower surface of the bottom part of the nozzle sheet presser. (A) It is the longitudinal cross-sectional view which expanded and showed the principal part of the 2nd pulse shower mechanism in the embodiment. (B) It is the cross-sectional view which expanded and showed the principal part of the 2nd pulse shower mechanism. It is the perspective view which showed the principal part in a 2nd pulse shower mechanism. It is the figure which showed the principal part of other embodiment of this invention. It is a figure of a conventionally well-known shower water discharging apparatus.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, 10 is a shower head, 12 is a grip part thereof, and 14 is a head part.
FIG. 2 specifically shows the internal structure of the shower head 10.
As shown in FIG. 2, the shower head 10 includes an upper case 16, a partition member 18, and a lower case 20.
The partition member 18 includes a first member 22 and a second member 24 made of resin, which are joined and integrated by welding of the resins, and a main water chamber 28 communicating with the upstream water channel 26 is formed. They are formed inside.
Here, the partition member 18 is fixed to the upper case 16 by a bolt 32 in the fixing portion 30.

A screw portion 34 is provided at the lower end portion and the outer peripheral portion of the upper case 16, and a screw fixture 36 is screwed into the inner fitting state.
The partition member 18 is fixed by the outer peripheral portion being pressed upward by the screw fixture 36.
The screw fixture 36 may be omitted depending on circumstances.

The lower case 20 also includes an upper first member 38 made of resin and a lower second member 40, which are joined and integrated by welding of the resins.
The lower case 20 is fixed to and supported by the boss portion 47 of the partition member 18 through a stepped sleeve 46 by a bolt 44 at a fixing portion 42 at the center.

Reference numeral 48 denotes a cap which is assembled to the lower case 20, that is, the head 14 of the shower head 10 by screwing the outer peripheral wall portion 50 of itself with the peripheral wall portion 52 of the lower case 20.
The cap 48 has a double wall structure of the outer peripheral wall portion 50 and the inner peripheral wall portion 51, and includes the bottom portion 60 of the cap 48 between the outer peripheral wall portion 50 and the inner peripheral wall portion 51. A first water chamber 54 is formed on the outer peripheral side of the water spray plate 58, and a second water chamber 56 is formed inside the inner peripheral wall portion 51, that is, on the inner peripheral side of the water spray plate 58.

Further, a plurality of third water chambers 68 are provided at a position on the outer peripheral side of the first water chamber 54 along the circumferential direction, in this case, at 16 locations.
The plurality of third water chambers 68 are provided with mist mechanisms 70, and the water guided to the third water chambers 68 is converted into mist by the mist mechanisms 70, and the annular bottom portion of the lower case 20. The mist hole 72 formed in the nozzle is sprayed to the outside.
Here, the mist hole 72 has a hole diameter (minimum diameter part) of φ1.0 mm.
In this embodiment, a water spray plate 58-1 of the first pulse shower mechanism 91, which will be described later, is configured by the bottom 60 itself of the cap 48, and a water spray plate 58-2 of the second pulse shower mechanism 92 is connected to the bottom 60. A sheet portion 142 of a nozzle sheet 140, which will be described later, and a bottom portion 152 of a nozzle sheet retainer 148 are configured in a three-layer laminated structure.

On the outer peripheral surface of the lower case 20, a ring-shaped switching operation part 64 is fitted in an externally fitted state. By the switching operation part 64, the entire lower case 20 and the cap 48 are attached to them. It can be rotated around the bolt 44.
The switching operation unit 64 is provided with a protruding knob 66 as shown in FIG.

The lower case 20 includes a first water channel 74 that communicates with the first water chamber 54, a second water channel 76 that communicates with the second water chamber 56, and an annular third water channel 78 that communicates with the third water chamber 68. Is formed.
On the other hand, the partition member 18 is provided with an outflow opening 80 communicating with the main water chamber 28 as shown in FIG.
The lower case 20 has a first inflow opening 82 that communicates with the first water channel 74, a second inflow opening 84 that communicates with the second water channel 76, and a third inflow opening 86 that communicates with the third water channel 78. It is provided above.

In this embodiment, when the switching operation portion 64 is rotated to match the first inflow opening 82 with the outflow opening 80, the water flowing from the upstream water channel 26 flows from the main water chamber 28 into the outflow opening 80, It flows into the 1st water channel 74 through the 1 inflow opening 82, and then flows into the 1st water chamber 54 through the communication opening 88 shown in FIG.2 and FIG.4 (c).
On the other hand, when the second inflow opening 84 is matched with the outflow opening 80, water from the upstream portion flows into the second water channel 76 from the main water chamber 28 through the outflow opening 80 and the second inflow opening 84, and then FIG. It flows into the second water chamber 56 through the communication opening 90 shown in FIG.
When the third inflow opening 86 is matched with the outflow opening 80, the water from the upstream portion flows from the main water chamber 28 into the third water channel 78 through the outflow opening 80 and the third inflow opening 86, and then the third water chamber. 68 flows into mist and is mist-injected from the mist hole 72 to the outside.

The water flowing into the first water chamber 54 is intermittently discharged by the first pulse shower mechanism 91, that is, pulse shower water is discharged.
The water flowing into the second water chamber 56 is intermittently discharged by the second pulse shower mechanism 92, that is, pulse shower water is discharged.

4 is a view of the inside of the head 14 of the shower head 10 as viewed downward from the upper side in FIG. 1, and FIG. 1 is a view of the head 14 as viewed upward from the lower side.
In these drawings, when the knob 66 of the switching operation portion 64 is in the neutral position, the second inflow opening 84 is in a state of being coincident with the outflow opening 80. Therefore, at this time, the water in the main water chamber 28 is in the second water chamber. 56, and is discharged by the second pulse shower mechanism 92.

In this state, when the switching operation unit 64 is rotated counterclockwise in FIG. 4 (clockwise in FIG. 1), the first inflow opening 82 matches the outflow opening 80, and the water in the main water chamber 28 is the first. The water flows into the water chamber 54 and is discharged by the first pulse shower mechanism 91.
On the contrary, when the switching operation portion 64 is rotated clockwise in FIG. 4, the third inflow opening 86 matches the outflow opening 80, and the water in the main water chamber 28 flows into the third water chamber 68, and the mist Mist is injected from the hole 72 to the outside.

5 to 8 specifically show the configuration of the first pulse shower mechanism 91.
As shown in FIGS. 6, 7, 8 and 2, the first pulse shower mechanism 91 is an annular and circular guide provided on the upper surface of the cap 48, that is, the inner surface (upper surface) of the water spray plate 58-1. A groove 93 is provided.
First shower holes 94 are provided at regular intervals in the circumferential direction along the bottom of the guide groove 93.
Here, the first shower hole 94 has a large diameter of φ1.8 mm.
In the present embodiment, a total of eight first shower holes 94 are provided at regular intervals in the circumferential direction.

As shown in FIG. 6, the first pulse shower mechanism 91 further includes a rotating body 96 and a water flow ejection member 98 (both of which are made of resin).
The rotating body 96 is a member having a circular ring shape, and has a bottom portion 100 and a peripheral wall portion 102 as shown in FIG. 7B, and is separated from each other by 120 ° in the circumferential direction. Has a ball holding portion 104.
Further, between the ball holding portions 104 and 104, a plurality of walls 106 having a substantially L shape in plan view are provided at equal intervals.
Here, as shown in FIG. 5, the wall 106 has a main portion 106A extending in the center direction, that is, the centripetal direction from the annular peripheral wall portion 102, and a bent portion 106C bent at the tip of the main portion 106A. ing.
The root 106B of the wall 106 on the concave surface side of the main portion 106A to the peripheral wall portion 102 has a curved shape, and the transition portion 106D from the main portion 106A to the bending portion 106C has a curved shape. Yes.

The rotating body 96 is provided with a plurality of slit-shaped through-openings 108 at a constant pitch at the bottom 100, and between the adjacent L-shaped walls 106 and 106 in plan view as shown in FIG. A side opening 110 is formed.
The ball holding portion 104 in the rotating body 96 has a holding hole 112 (see FIG. 7B) that has a spherical shape opened on the lower surface in the drawing, strictly speaking, a partial spherical shape. The balls 114 (the balls 114 are also made of resin) are rotatably held in a state where their lower portions protrude slightly downward.

The rotating body 96 is configured such that a ball 114 having a lower portion projecting from each holding hole 112 is concavo-convexly fitted in the guide groove 93 having a concave shape with a circular cross-sectional shape, and the concavo-convex fitting state is maintained. The ball 114 rotates around the center of the guide groove 93 (the center in the radial direction) while rotating around the guide groove 93.
In other words, the guide groove 93 and the ball 114 are rotated along a rotation locus defined by the concave-convex fitting.

At this time, when the ball 114 that rolls along the guide groove 93 reaches the shower hole 94 provided at the bottom of the guide groove 93, the shower hole 94 is blocked by the ball 114, and this is further separated into the ball. The shower hole 94 is opened by 114 passing.
That is, each ball 114 intermittently blocks and opens each shower hole 94 as it moves around the guide groove 93.

On the other hand, the water jet member 98 has a disk shape as a whole, and has a plurality of jet holes 116 at a constant pitch along the circumferential direction.
Each injection hole 116 forms an oblique hole, and the water flowing from the upstream side passes through the injection hole 116 to the downstream side, and at this time, the above-mentioned wall provided in the rotating body 96 as the injection water flow. The rotating body 96 is driven to rotate by colliding with 106.

In the present embodiment, the first pulse shower mechanism 91 operates as follows.
By rotating the ring-shaped switching operation portion 64, the water that has flowed into the first water channel 74 by matching the first inflow opening 82 shown in FIG. It reaches the upper surface of the water jet member 98 downward in the figure via 88.
The water flow injection member 98 injects the water that has reached in this way as a water flow through its own injection hole 116 downward in the figure and obliquely in the rotational direction.
The jet water flow hits the wall 106 of the rotating body 96 to rotate it.

At this time, the rotating body 96 rotates smoothly along the rotation locus defined based on the concave / convex fitting between the ball 114 and the guide groove 93 and by the function of the ball 114 as a bearing.
At that time, the ball 114 rolls (rotates) the guide groove 93 integrally with the rotating body 96 while being held by the rotating body 96, and the ball 114 is moved along with the rotating motion, that is, every time it passes through the first shower hole 94. It shuts off and opens, so that the shower water is intermittently discharged from the first shower hole 94 to discharge the pulse shower.

  In other words, in this embodiment, the ball 114 cooperates with the guide groove 93 to define the rotation locus of the rotating body 96, to reduce the rotational resistance of the rotating body 96 as much as possible by the bearing action, Three functions as a valve for opening and closing one shower hole 94 are simultaneously performed.

  In the first pulse shower mechanism 91, the first shower holes 94 are large-diameter shower holes with a large hole diameter, and the first shower holes 94 as a whole have a small number of only eight and a large pitch. Therefore, a thick and vigorous water flow is jetted from each first shower hole 94. Therefore, the shower water flow from the first shower hole 94 is effectively interrupted, and the user is effectively massaged. Is done.

The configuration of the second pulse shower mechanism 92 is shown in detail in FIGS.
As described above, the water spray plate 58-2 of the second pulse shower mechanism 92 includes the bottom portion 60 of the cap 48, the sheet portion 142 of the nozzle sheet 140 overlaid thereon, and the nozzle sheet presser 148 overlaid thereon. It is comprised by the 3 layer laminated structure with the bottom part 152 of this.
The nozzle sheet 140 is made of rubber (may be made of other elastomer material), and the nozzle sheet 140 includes a sheet portion 142 and a sheet portion 142 as shown in FIGS. 3 and 9. A plurality of nozzle portions 144 protruding downward, and each nozzle portion 144 passes through an insertion hole 146 formed in the bottom portion 60 of the resin cap 48, and each tip portion protrudes downward. ing.

The plurality of nozzle portions 144 have nozzle holes 118A therein, and the second shower holes 118 (see FIG. 5) on the inner peripheral side of the first shower holes 94 in the second pulse shower mechanism 92 by the nozzle holes 118A. 1)).
The nozzle portions 144 are arranged in a quadruple concentric shape, and the four concentric shower holes 118 shown in FIG. 1 (specifically, the lower portion of the shower holes 118) are formed by the nozzle holes 118A of the nozzle portions 144. Forming.
Here, each second shower hole 118 has a smaller diameter than the first shower hole 94. Specifically, here, the second shower hole 118 has a hole diameter of φ0.8 mm at the lower end opening.

In FIG. 1, 118-1 is the outermost shower hole (specifically, the lower part of the shower hole; the same applies hereinafter), 118-2 is the inner shower hole, 118-3 is the inner shower hole, 118 Reference numeral -4 denotes the innermost shower hole, and the lower part of the four shower holes is formed by the nozzle hole 118A of the nozzle part 144 described above.
The innermost shower hole 118-4 is formed at three locations separated by 120 ° in the circumferential direction.

  As shown in FIG. 3, the sheet portion 142 of the nozzle sheet 140 has a curved shape such that the lower surface is convex downward, the upper surface is concave downward, and the surface falls from the lower surface at a right angle. Each nozzle part 144 is formed integrally with the sheet part 142.

The nozzle sheet presser 148 is a member that presses and fixes the nozzle sheet 140 against the bottom portion 60 of the cap 48, and is made of a hard (here, resin) member, and has a container shape with an open top surface. At the same time, a second water chamber 56 is formed inside, and an impeller 124 described later is accommodated therein.
The nozzle sheet presser 148 has a circular peripheral wall portion 150 and a bottom portion 152. The bottom surface of the bottom portion 152 forms a convex curved surface corresponding to the concave curved surface of the sheet portion 142 in the nozzle sheet 140.

The nozzle sheet presser 148 is fixed by being sandwiched between the lower case 20 and the bottom portion 60 of the cap 48 via a water jet member 127 described later by screwing the cap 48 upward into the peripheral wall portion 52 of the lower case 20. .
The screwing force of the cap 48 at that time causes the sheet portion 142 of the nozzle sheet 140 to be pressed downward against the bottom portion 60 of the cap 48 by the bottom portion 152 of the cap 48, thereby fixing the nozzle sheet 140 to the cap 48. .

A number of communication holes 118B that communicate with the nozzle hole 118A and form the upper part of the second shower hole 118 pass through the bottom 152 and have a second upper end at the second end. It is provided in a form opening in the water chamber 56.
12A shows a plan view of the bottom 152 of the nozzle sheet presser 148, and FIG. 15B shows a bottom view. As shown in these drawings, the communication hole 118B has an upper end. Both the opening and the opening at the lower end are arranged in a triple concentric shape.

The outermost communication hole 118B coincides with and communicates with the nozzle hole 118A of the outermost nozzle part 144 of the four concentrically arranged nozzle parts 144, together with the nozzle hole 118A. One outermost shower hole 118-1 is formed.
Also, the inner communication hole 118B coincides with and communicates with the nozzle hole 118A of the next inner nozzle part 144 at the outermost periphery, and forms the shower hole 118-2 of FIG. 1 together with the nozzle hole 118A. doing.
Further, the communication hole 118B on the inside coincides with and communicates with the nozzle hole 118A of the nozzle portion 144 on the third inner peripheral side from the outermost periphery, and the shower hole 118-3 in FIG. 1 is formed together with the nozzle hole 118A. Forming.

As shown in FIG. 12B, a part of the nozzle hole 118B at the innermost peripheral position in FIG. 12A is branched toward the center of the bottom 152. 1 and communicates with the nozzle hole 118A of the innermost nozzle portion 144 of the four concentric nozzle portions 144 at the center side end of the branch portion T, and the innermost portion shown in FIG. An inner peripheral shower hole 118-4 is formed.
Accordingly, the water flowing from the second water chamber 56 into the innermost communication hole 118B in FIG. 12A passes through the innermost communication hole 118B and the third nozzle hole 118A from the outermost periphery to the innermost communication hole 118B. Water is supplied to both of the nozzle holes 118A.

  In addition to the second shower hole 118 described above, the second pulse shower mechanism 92 includes an impeller 124 shown in FIG. 10 that is rotatably disposed in the second water chamber 56, and a cylindrical portion at the center of the impeller 124. And a water jet member 127 provided with a shaft 126 (see FIGS. 1 and 3) on which 122 is rotatably fitted.

The water jet member 127 has a disc shape and is press-fitted into the press-fitting hole 125 (see FIG. 3) of the lower case 20 at the outer peripheral portion and fixed thereto.
This water jet member 127 introduces water that has flowed in through the inflow opening 84 in FIG. 4 (a) and the communication opening 90 in FIG. 4 (c) into the injection hole 128 and allows it to pass therethrough. Then, a jet water flow is generated and applied to the blade 129 of the lower impeller 124 in the drawing, and the impeller 124 is rotationally driven.
Here, as shown in FIG. 9, the direction of the injection hole 128 is determined so that the water flow injected from here hits the concave side of the curved blade 129 of the impeller 124.

As shown in FIG. 10, the impeller 124 has a large number of blades 129A and 129B arranged at a constant pitch in the circumferential direction around the central cylindrical portion 122.
Here, the blades 129A and 129B have the same shape.
These blades 129A and 129B extend from the central cylindrical portion 122 toward the outer periphery so as to draw a partial spiral shape.

The impeller 124 is provided with a shower hole blocking part 130 having a partial disk shape (substantially semicircular plate shape) at a lower position of the blade 129B, and the space between the blades 129B and 129B is The lower surface is closed by the shower hole blocking part 130.
On the other hand, the lower surface of the space between the blades 129A and 129A is open, and the outer peripheral ends of the blades 129A are connected to each other by a connecting portion 131 having a substantially semicircular arc shape.
An annular gap is formed between the cylindrical portion 122 and the blade 129B and between the upper portion of the blade 129A.
The shower hole blocking portion 130 is formed with slit holes 133 communicating with the space between the blades 129B and 129B at two locations separated in the circumferential direction.

  As shown in FIG. 3, the impeller 124 has the lower end portion of the central cylindrical portion 122 directly connected to the upper surface of the bottom portion 152 of the nozzle sheet retainer 148, that is, the inner surface of the water spray plate 58-2 in the second pulse shower mechanism 92. Is placed on the inner surface of the water spray plate 58-2, and the shower hole blocking part 130 forms a minute clearance with respect to the inner surface of the water spray plate 58-2. It extends along the inner surface at a position closest to the inner surface of 58-2.

  The set clearance between the blade 129B and the shower hole blocking portion 130 and the inner surface of the water spray plate 58-2 is 0.4 mm.

The second pulse shower mechanism 92 operates as follows.
The water flowing into the second water channel 76 of FIG. 2 by matching the inflow opening 84 of FIG. 4 with the outflow opening 80 by the rotation operation of the switching operation portion 64 to the water jet member 127 through the communication opening 90 of FIG. It arrives.
The water jet member 127 passes the flowing water through its own injection hole 128, and at that time, the passing water becomes a jet water flow and collides with each blade 129 of the lower impeller 124.
Here, the impeller 124 rotates around the shaft 126 with the momentum of the jet water flow.
At this time, the shower hole blocking portion 130 in a state of covering substantially half of the lower surface of the impeller 124 intermittently blocks and opens the second shower hole 118 as it rotates, and intermittently shower water from the second shower hole 118. The pulse water is discharged.

The number of the second shower holes 118 is large as a whole, and each shower hole has a smaller diameter than the first shower hole 94 in the first pulse shower mechanism 91. Water is discharged.
And the shower water can achieve water saving by intermittently discharging water and stopping water discharge, that is, intermittent shower water discharge.

As described above, the opening at the upper end of the communication hole 118B opened at the inner surface (upper surface) of the bottom portion 152 of the nozzle sheet retainer 148 is the axis of the shaft 126 of the water flow ejection member 127 as shown in FIGS. Are arranged side by side on a circle forming a triple concentric circle with the center at the center.
That is, the opening at the upper end of the shower hole 118 in the second pulse shower mechanism 92 is arranged side by side on a circle that forms a triple concentric circle on the inner surface of the water spray plate 58-2.
Three circumferential grooves 160 forming triple concentric circles are provided on the inner surface of the water spray plate 58-2, specifically, the inner surface of the bottom portion 152 of the nozzle sheet presser 148. The groove 160 has a shallow groove depth, and here the groove depth is 0.2 mm.

Here, the outermost groove 160-1 is provided to be located at the same radial position as the outermost communication hole 118B, that is, the opening at the upper end of the outermost shower hole 118, and the inner groove 160-2 is The innermost circumferential groove 160-3 is positioned at the same radial position as the opening at the upper end of the communication hole 118B on the next circumference of the outermost circumference, and the communication hole 118B on the circumference of the innermost circumference. It is provided so that it may each be located in the same radial position as the opening of the upper end.
The upper ends of the communication holes 118B are opened at the bottom surfaces of the grooves 160-1, 160-2, and 160-3, respectively.

  Accordingly, as shown in FIG. 13, the opening at the upper end of the shower hole 118 that opens at the bottom surface of the groove 160-1, that is, the opening at the upper end of the communication hole 118B, and the shower hole blocking portion 130 in the impeller 124 are not positioned. A partial enlarged gap S-1 that connects the space K formed between the blades 129A and 129A in the circumferential direction is the lower end of the blade 129A and the inner surface of the bottom 152 of the nozzle sheet presser 148, that is, the second. It is generated between the inner surface of the water spray plate 58-2 in the pulse shower mechanism 92.

Further, a partial enlarged gap S-2 that communicates the opening at the upper end of the communication hole 118B that opens at the bottom of the groove 160-2 on the inner peripheral side and the space K in the circumferential direction is the lower end of the blade 129A. And the inner surface of the water spray plate 58-2.
Further, a partially enlarged gap S-3 that connects the opening at the upper end of the communication hole 118B that opens at the bottom surface of the innermost groove 160-3 and the space K in the circumferential direction is a blade 129A and a water spray plate 58-. Between the inner surface of the two.

When the partial enlarged gaps S-1, S-2, and S-3 as described above are not generated, the water in the space K between the blades 129A and 129A has an upper end opening in the space K. The communication hole 118B (located between the blades 129A and 129A), that is, can be smoothly discharged to the outside through the shower hole 118, but the upper end opening is entirely or partially below the blade 129A. The water is not smoothly discharged to the outside through the communication hole 118B that is hidden, and the water in the space K is spilled there, so that the squeezing pressure is generated in the space K. End up.
Then, the impeller 124 cannot stably and smoothly rotate due to the resistance due to the squeezing pressure, and the shower water is not discharged well in a pulsed manner.

However, in this embodiment, partial enlarged gaps S-1 and S- that connect the opening at the upper end of the communication hole 118B and the space K in the circumferential direction between the blade 129A and the upper surface of the water spray plate 58-2. 2 and S-3 are generated, the water in the space K becomes smooth as a shower water through the communication hole 118B in which the upper end opening is located in the space K, that is, the shower hole 118. In addition, the water in the space K can sufficiently flow to the lower side of the blade 129A through the partial enlarged gaps S-1, S-2, and S-3. The water is smoothly discharged to the outside as shower water also through the communication hole 118B in which the opening at the upper end is located entirely or partially hidden on the lower side.
Accordingly, not only shower water is discharged evenly through each of the communication holes 118B that are not blocked by the shower hole blocking unit 130 (water discharge), but also the impeller 124 rotates due to the squeezing pressure generated in the space K. The impeller can be prevented and the impeller 124 can be stably and smoothly rotated.

  According to the present embodiment as described above, the opening at the upper end of the shower hole 118 is arranged side by side on the circumference, so that the shower hole blocking unit 130 blocks the rotary movement of the shower hole blocking unit 130. The shower water can be discharged in a pulse shape by blocking and opening the shower hole 118 by the shower hole blocking section 130 while discharging shower water over a wide angle range from the shower hole 118 that is not.

  In the present embodiment, not only the shower hole 118 in which the upper end opening is located in the space K formed between the blades 129A and 129A adjacent in the circumferential direction, but also a hidden position below the blade 129A. Since the water in the space K can be smoothly discharged to the outside through the shower hole 118 in which the upper end opening is located, the impeller 124 is smoothly and stably rotated without generating pressure in the space K. The shower water can be discharged in a pulsed manner.

In the above example, by providing the circumferential groove 160 on the inner surface of the water spray plate 58-2, partial enlarged gaps S-1, S-2, and S-3 are generated. As shown in FIG. 15, the lower portion of the inner surface side of the water spray plate 58-2 in the blade 129A and the shower hole blocking portion 130 is a communication hole 118B arranged side by side on three circumferences forming a triple concentric circle. So as to create partial enlarged gaps S-1, S-2 and S-3 at the notches 164-1, 164-2 and 164-3. You can do it.
Alternatively, the circumferential grooves 160-1, 160-2, and 160-3 and the notches 164-1, 164-2, and 164-3 are provided in combination, thereby partially expanding the gaps S-1 and S-. 2, S-3 may be produced.
Even in these cases, basically the same effects as described above can be obtained.

Although the embodiment of the present invention has been described in detail above, this is merely an example.
For example, in the present invention, the first pulse shower mechanism 91 described above can be omitted, and the hole provided in the bottom 60 of the cap 48 is formed as the water spray hole 118 of the second pulse shower mechanism 92, so that the second paus shower is provided. The water spray plate 58-2 of the mechanism 92 may be configured by the bottom portion 60 itself of the cap 48 without the sheet portion 142 of the nozzle sheet 140 and the bottom portion 152 of the nozzle sheet retainer 148.
In addition, this invention can be comprised in the form which added the various change in the range which does not deviate from the meaning.

58, 58-2 Sprinkler plate 118 Second shower hole (shower hole)
126 Shaft 122 Cylindrical part 124 Impeller 129A, 129B Blade 130 Shower hole blocking part 160, 160-1, 160-2, 160-3 Groove 164-1 to 164-3 Notch K space S Expanding gap

Claims (1)

(a) a plurality of shower holes provided in the water spray plate; and (b) an impeller that rotates around the shaft based on fitting between the shaft and a cylindrical portion that is rotatably fitted to the shaft; (c) a water flow injection member that allows water from an upstream portion to pass through, impinges the passing water on the impeller blades as a jet water flow, and rotationally drives the impeller, and (d) along the inner surface of the water spray plate A shower hole blocking portion that is provided in the impeller over a predetermined circumferential length in a form that extends, rotates around the axis by rotation of the impeller, and intermittently blocks and opens the shower hole with rotation. A shower water discharge device for discharging shower water from the shower hole,
The opening at the upper end of the shower hole that opens at the inner surface of the water spray plate is arranged side by side on the circumference centered on the axis of the shaft, and the water spray plate is at the same radial position as the opening at the upper end of the shower hole. A groove having a constant circumferential width is provided on the inner surface of the groove, and the opening of the upper end is positioned on the bottom surface of the groove, or / and at a lower portion on the inner surface side of the watering plate in the impeller By notching a portion located at the same radial position as the opening at the upper end of the shower hole with a certain width in a circumferential shape,
Between the opening at the upper end and the impeller, a partially enlarged gap that communicates each space formed between the blades adjacent to each other in the circumferential direction and the opening at the upper end in the circumferential direction. Form the
The gap between the inner surface of the water spray plate and the lower part of the impeller at the enlarged gap is at a radial position different from the radial position at which the circumferential groove or / and the notch is provided. shower water discharge device, characterized in that are large Kunashi relative gap between the lower portion of the inner surface and the impeller of the water spray plate.

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