JP2010220919A - Shower head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shower head capable of preventing a drip more at a stop. <P>SOLUTION: The shower head includes: a water flow member having a water channel and a second vent hole; a shower head body provided with a first vent hole capable of air-communicating with the second vent hole; a spraying plate fixed to the head body on the downstream end of the channel and having sprinkling holes; a water holding plate disposed in the upstream side of the spraying plate and in the downstream side of the water flow member, and having water holding holes with diameters smaller than those of the sprinkling holes; and a piston part shifting to the head body in the upstream side of the water holding plate, and having an elastic member. The piston part forms a first space forming the water channel and a second space communicating with the first air vent hole and water-tightly separated from the first space, the water flow member has an opening in which hot water flows to the upstream side of the piston part, the piston part closes the opening at a stop of discharging water and shifts in a direction for opening the opening due to a pressure of hot water at discharging, and a volume of a water flow space formed of the water flow member, the piston part and the water holding plate is larger at a stop than at discharging. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a shower head.

  As a conventional shower head, a configuration in which a water spray plate having a plurality of water spray holes at the end of a water passage in the shower head main body is fixed to the shower head main body is known. When such a conventional shower head is locked to the shower hook after use of the shower, air exchange or the like occurs due to intrusion of outside air from the water spray hole, and the hot water remaining in the shower head body becomes water droplets from the water spray hole. There is a problem that the quality of the shower head is lowered by dripping water.

  For example, in Patent Document 1, a watering cap having a plurality of watering holes is attached to a shower head, and the periphery of the watering holes on the back surface of the watering cap is formed into a convex shape. By using a configuration in which the net is brought into contact with the water, the dripping of the remaining hot water is prevented.

  Moreover, the shower head described in Patent Document 2 is a shower head having a plurality of water spray holes 3a on the front surface of the water flow space 2 as shown in FIG. The isolation chamber 4 is separated and separated, so that the isolation chamber 4 can be vented to the outside through the small-diameter through-hole 6 so that the hot water accumulated in the water flow space in the head body is dropped from the water spray hole 3a. As it prevents drooping.

Japanese Patent Laid-Open No. 2002-355581 JP 2005-334167 A

  However, as in Patent Document 1, even when the surface tension is increased by inserting a mesh net inside the water sprinkling part and the remaining hot water does not flow out, the surface tension is insufficient. After use or after use, vibration when touching the shower hose causes air exchange due to the intrusion of outside air from the sprinkling holes, etc., and the hot water that has been maintained in the net by the influence of surface tension, that is, the shower head body There was a problem that the hot water remaining inside caused dripping.

  Moreover, in the structure of patent document 2, if the shower head 1 is made into a water stop state from a water discharge state, the negative pressure in the water flow space 2 will be eliminated, and since it will become the same as an external atmospheric pressure, air is discharged from the small diameter through-hole 6. As a result, the thin film 5 is displaced from the broken line state to the solid line state, and the content of the isolation chamber 4 is reduced. Accordingly, the hot water level in the shower head 1 rapidly decreases in the direction of the arrow. Further, the capacity of the water flow space 2 is surely increased by the water pressure of the hot water accumulated in the water flow space 2, and is stored in the water flow space 2 at a position lower than the water spray hole 3a, but the shower head is tilted. When the water spray plate 3 is directed downward, there is a problem that the hot water accumulated in the water flow space 2 flows out from the water spray hole 3a as water dripping. Further, in order to lower the water level than all the water spray holes, it is necessary to sufficiently increase the volume change occurring in the isolation chamber 4, resulting in a problem that the shower head becomes large. Furthermore, in the configuration of Patent Document 2, an effect is produced by a sudden change from water discharge to water stop, but there is also a problem that a slow water stop does not produce an effect because the thin film 5 does not move.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a shower head capable of preventing water dripping at the time of water stoppage.

  In order to solve the above-described problems, a shower head according to the present invention has a water passage member in which a water passage is formed and a second vent hole is formed on an outer surface, and the outer surface is open to be ventilated with the second vent hole. A shower head main body having a first vent hole, a water spray plate having a plurality of water spray holes formed at the downstream end of the water passage, and attached to the shower head main body, upstream of the water spray plate, and the water flow member A water retention plate that is disposed on the downstream side of the water spray plate, the water retention plate having a plurality of water retention holes having a diameter smaller than the diameter of the water spray holes, the upstream side of the water retention plate, and moves relative to the shower head body, And a piston portion including an elastic member, wherein the piston portion communicates with the first space forming the water passage and the first ventilation hole, and is watertightly separated from the first space. Forming a second space, The water passage member is formed with an opening through which hot water flows in on the upstream side of the piston portion. When the water is stopped, the piston portion is in a position to close the opening. The volume of the water flow space formed by the water flow member, the piston portion and the water retention plate is larger than that at the time of water discharge by moving in the direction of opening the opening due to the pressure of hot water flowing into the water flow portion. It is characterized by a larger size when the water is stopped.

  With this configuration, the piston is pushed down by the water passing pressure when water is discharged, and the piston moves upstream when water is stopped. At this time, air escapes by the first vent hole via the second vent hole, and the piston is restored. As a result, the volume of the water passing space becomes larger when the water is stopped than when the water is discharged, so that the hot water between the water retention plate and the water spray plate is also drawn back to the upstream side of the water retention plate. In this state, since the water retention hole of the water retention plate is smaller in diameter than the water spray hole, the remaining hot water upstream of the water retention plate generates surface tension at the water retention hole, and can prevent water dripping more effectively. When the water stops, the opening of the water flow member is in the position where the piston closes, so even if the shower head body is tilted and the water spray plate faces downward, not only the hot water remaining in the water flow space, but also the opening The hot water remaining on the upstream side of the section does not drip. Moreover, since it moves to the position which closes an opening part reliably by elastic deformation of the elastic member of a piston part instead of the structure using only the negative pressure of air like patent documents 2, even with slow water stop, Water dripping can be surely prevented.

  In addition, because it is configured to stop the remaining hot water at the water retaining hole of the water retaining plate, it is not necessary to stop the remaining hot water by reducing the diameter of the watering hole of the watering plate, so it does not worry about dripping, The diameter of the water spray hole of the water spray plate can be changed according to the purpose.

  Furthermore, the shower head of the present invention is characterized in that the piston portion is moved by a spring portion which is an elastic member fixed to the water retention plate.

  With this configuration, the piston portion can be moved by using the spring portion, which is an elastic member fixed to the water retention plate, so that the present configuration can be realized without a complicated configuration.

  In the shower head according to the present invention, the piston portion includes a columnar first columnar portion and a columnar second columnar portion extending near the center of the columnar portion. A cylindrical part closes the opening of the water flow member, the first cylindrical part closes the second vent hole, and the second space at the time of water discharge is formed by the water retaining plate and the water spray plate. It is characterized by being larger than the volume of the third space.

  With this configuration, when the piston is moved at the time of water stoppage, hot water of a volume corresponding to the second space is drawn back to the upstream side, and the volume of the second space is larger than the volume of the third space formed by the water retention plate and the water spray plate. Since it is large, the hot water in the third space is drawn back upstream from the water retaining plate. In this state, since the water retaining hole of the water retaining plate has a smaller diameter than the water spray hole, surface tension is generated in the hot water remaining upstream of the water retaining plate, and dripping can be more effectively prevented.

  According to the present invention, the piston portion moves to the position where the opening is reliably closed, the hot water in the shower head is pulled back to the upstream side of the water retaining plate, and the hot water remaining upstream of the water retaining plate is retained by the water retaining hole. Since the surface tension is generated, it is possible to provide a shower head capable of preventing water dripping more effectively.

It is sectional drawing of the shower head which shows the time of water discharge of this invention. It is sectional drawing of the shower head which shows the time of the water stop of this invention. It is sectional drawing which shows the shower head of a prior art.

  Hereinafter, embodiments of the shower head of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 are cross-sectional views showing when the shower head is stopped and discharged, according to an embodiment of the present invention. Here, the example applied to the shower head 1 used when taking a shower on the body in a bathroom or a shower room is shown. In addition, although not shown in figure, this shower head 1 is connected to the shower hose branched from the hot / cold water faucet.

  First, with reference to FIG.1 and FIG.2, the whole structure of the shower head 1 is explained in full detail. The shower head 1 has an external appearance formed by a shower head main body 20 including a cover head 5 positioned at a water discharge port and a shower head outer shape 2 connected to a shower hose (not shown). A first vent hole 4 is formed so as to open to the outside and allow ventilation to the outside. The water passing member 3 is screwed to the shower head outer shape portion 2 inside the shower head main body 20 and disposed inside the shower head main body 20. This water passage member 3 has a first air hole 4 and a second air hole 32 that can be vented formed on the outer surface, and an opening 31 that is an inlet of hot water flowing into the water passage member 3 is formed inside. A first space 11 forming a water passage is formed. The cover 5 is fixed to the water passing member 3 with screws.

  A plurality of openings through which the plurality of water spray holes 61 of the water spray plate 6 are inserted are formed in the cover part 5, and the plurality of water spray holes 61 are inserted into the openings, and the water spray plate 6 is located upstream of the cover part 5. Installed. A plurality of watering holes 61 are formed in the watering plate 6 and are arranged concentrically.

  A water retention plate 7 is disposed on the upstream side of the water spray plate 6, that is, on the inner side of the shower head main body 20 so as to be sandwiched between the cover portion 5 and the water passage member 3. A third space 13 is formed between the water retention plate 7 and the water spray plate 6, and hot water flowing out from the plurality of water retention holes 71 formed in the water retention plate 7 flows into the third space, and thereafter In addition, water is discharged from the water spray hole 61. The water retaining hole 71 is formed with a smaller diameter than the watering hole 61 of the watering plate 6. In this embodiment, the hole diameter of the water spray hole 61 is φ0.8 mm, whereas the hole diameter of the water retaining hole 71 is φ0.5 mm. As for the relationship between the diameters of the holes, it is sufficient that the diameter of the water retaining holes 71 is smaller than the diameter of the water holes 61, and the diameter of the water holes 61 can be changed according to the purpose.

  A piston portion 8 that moves up and down with respect to the shower head main body 20 and the water passage member 3 is disposed inside the water passage member 3 on the upstream side of the water retention plate 7. As shown in FIGS. 1 and 2, the piston portion 8 extends near the center of the columnar first columnar portion 81 and the first columnar portion 81, and is configured by a columnar second columnar portion 82. Although not shown, when the piston portion 8 is viewed from above, a notch is formed between the first columnar shape 81 and the second columnar portion 82, and hot water flowing into the water passage member passes through the notch. It is the structure which flows toward the water retention board arrange | positioned downstream. The second cylindrical portion 82 has a hollow inside, and the spring portion 9 that is an elastic member is disposed in the hollow, and one end of the spring portion 9 is fixed to the water retention plate 7 disposed on the downstream side. Has been. As shown in FIGS. 1 and 2, a water passage space 10 is formed by the water passage member 3, the piston portion 8, and the water retention plate 7, and hot water flowing into the water passage member 3 is passed through the water passage member 3. Water is finally discharged from the water spray hole 61 via the first space 11 and the water flow space 10 that form the water flow path.

  Next, the time of water discharge and the time of water stop of a shower head are explained in full detail. FIG. 1 shows the time of water stoppage, and FIG. 2 shows the time of water discharge.

  As shown in FIG. 2, when water is discharged, hot water flows into the shower head body 20 from a shower hose (not shown) and flows into the opening 31 of the water passage member 3. At that time, the pressure of the flowing hot water is applied to the second cylindrical portion 82 of the piston portion 8, and a force is generated downward in FIG. 2 on the spring portion 9 disposed in the cavity inside the second cylindrical portion 82. Then, by performing elastic deformation in the direction in which the spring portion 9 contracts, the piston portion 8 moves in a direction to open the opening 31 of the water passage member 3 as shown in FIG. Due to the opening 31 being opened, the hot water that has flowed into the water flow member 3 flows toward the water retention hole 71 of the water retention plate 7 via the first space 11 and the water flow space 10. Hot water flowing into the water retaining hole 71 is discharged from the water spray hole 61 via the third space 13.

  The piston part 8 moves in the direction of opening the opening 31, so that the second air hole 32 formed in the water passage member 3 communicates with the second air hole 32 by the water passage member 3 and the first cylindrical part 81 of the piston part 8. A space 12 is formed. The second space 12 is a space that is watertightly separated from the first space 11 of the piston portion 8, and hot water that has flowed into the first space 11 from the opening 31 of the water flow member 3 flows into the second space. It has a structure that does not.

  Next, the state when the water is stopped from the time of water discharge in FIG. 2 will be described in detail with reference to FIG. When a water stop operation is performed by an operation unit (not shown) for switching between water discharge and water stop from the shower head 1 and hot water stops flowing into the water passage member 3, it is applied to the second cylindrical portion 82 of the piston portion 8. The pressure of the hot water disappears, and as a result, the spring portion 9 that has been elastically deformed and contracted tends to extend. As a result, when the spring portion 9 extends, the piston portion 8 moves to a position where the opening portion 31 of the water passage member 3 is closed, and the opening portion 31 is closed by the second cylindrical portion 82. At this time, since the first cylindrical portion 81 of the piston portion 8 also moves, the second space 12 formed at the time of water discharge is not formed, but the air that was present in the second space 12 passes through the second vent hole 32. Via, go out from the first vent hole 4. In the present embodiment, the second space 12 has a structure in which the volume at the time of water stoppage becomes zero, but it is not necessary to be zero, and if the volume at the time of water stoppage is reduced compared to the time of water discharge. ,no problem.

  At this time, the piston portion 8 moves to a position where the opening 31 of the water passage member 3 is closed, and the second space 12 formed at the time of water discharge is not formed, whereby the second space 12 formed at the time of water discharge. The volume of the water flow space 10 is larger than that at the time of water discharge. As a result, the volume of the second space 12 is drawn back to the upstream side of the hot water that is downstream of the water flow space 10, that is, the hot water that is in the water spray hole 61, the water retaining hole 71, and the third space 13. Will be. Therefore, of the hot water remaining in the shower head 1, the hot water located on the upstream side of the water passage member 3 does not flow out as dripping because the piston portion 8 closes the opening 31, and the first space. 11 and the hot water remaining in the water flow space 10 have a small surface diameter of φ0.5 mm, so that the surface tension is strong and does not flow out of the water retaining hole 71 as water dripping. A slight amount of hot water remaining in the third space without being pulled back to the upstream side is prevented from dripping by the water spray holes 61. Therefore, even when air exchange or the like occurs due to intrusion of outside air from the water spray hole due to vibration when touching the shower hose during cleaning or after water discharge, the hot water remaining upstream from the water retention hole 71 Since the surface tension at 71 is strongly generated, the water does not drip, and even if it drips, it is only a small amount of hot water remaining in the third space 13 and does not deteriorate the quality.

  In addition, since the volume of the 2nd space 12 formed at the time of water discharge is set as a structure larger than the volume of the 3rd space 13, since the hot water which was in the water spray hole 61 and the water retention hole 71 is few, the 3rd space The hot water in 13, that is, the hot water on the downstream side of the water flow space 10 is all drawn back to the water flow space 10. Therefore, even if air exchange occurs due to intrusion of outside air from the sprinkling holes due to vibration when touching the shower hose during cleaning or after water discharge, the remaining hot water has a strong surface tension. Since it is on the upstream side of the water retaining hole 71, the surface tension at the water retaining hole 71 is strongly generated, so that no water dripping occurs, so that water dripping can be reliably prevented.

  If the structure does not have the water retaining plate 7, the remaining hot water will sag unless it is pulled back to the position upstream of the piston portion 8, so it is very large to pull back upstream of the piston portion 8. The volume change of the water flow space 12 is required, and the structure for that purpose becomes complicated and large. Therefore, in this invention, if the water retention board 7 is arrange | positioned in the upstream of the water spray board 6, if the hot water which was to the water retention board 7 is pulled back, it has a structure which can prevent a water dripping more.

  In the present embodiment, the shower head is used when taking a shower in the body in a bathroom or a shower room. However, the present invention is not limited to this, and it may be used for a shower head used in a sink or kitchen. Good.

  The present invention can be used in any environment where a shower is used, such as an embodiment in which a bathroom, a wash basin, and other faucets are coupled and a shower head can be coupled.

DESCRIPTION OF SYMBOLS 1 Shower head 20 Shower head main body 3 Water flow member 4 First ventilation hole 5 Cover part 6 Water spray plate 61 Water spray hole 7 Water retention plate 71 Water retention hole 8 Piston part 81 First cylindrical part 82 Second cylindrical part 9 Spring part 10 Water flow Space 11 First space 12 Second space 13 Third space

Claims (3)

A water passage member that forms a water passage and has a second vent hole formed on the outer surface;
A shower head body that is open to the outer surface and includes the second vent hole and a first vent hole that can be vented;
A water spray plate having a plurality of water spray holes formed at the downstream end of the water passage and attached to the shower head body,
A water retention plate that is disposed upstream of the water spray plate and downstream of the water passage member, and has a plurality of water retention holes having a smaller hole diameter than the water spray hole;
A shower head that is disposed on the upstream side of the water retaining plate and moves with respect to the shower head main body and includes a piston portion including an elastic member,
The piston portion forms a first space that forms the water passage, and a second space that communicates with the first ventilation hole and is water-tightly separated from the first space.
The water passage member is formed with an opening through which hot water flows in on the upstream side of the piston portion. When the water is stopped, the piston portion is in a position to close the opening. The volume of the water flow space formed by the water flow member, the piston portion and the water retention plate is larger than that at the time of water discharge by moving in the direction of opening the opening due to the pressure of hot water flowing into the water flow portion. A shower head that is larger when the water stops.   The shower head according to claim 1, wherein the piston portion is moved by a spring portion that is the elastic member fixed to the water retention plate. The piston part is composed of a cylindrical first cylindrical part, a central cylindrical part, and a cylindrical second cylindrical part.
At the time of water stoppage, the second cylindrical portion closes the opening of the water passage member, the first cylindrical portion closes the second vent hole, and the second space at the time of water discharge is the water retaining plate The shower head according to claim 1, wherein the shower head is larger than a volume of a third space formed by the watering plate.

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