WO2017183715A1

WO2017183715A1 - Shower head

Info

Publication number: WO2017183715A1
Application number: PCT/JP2017/016020
Authority: WO
Inventors: 由修河合; 昇三木村
Original assignee: 三菱ケミカル・クリンスイ株式会社
Priority date: 2016-04-22
Filing date: 2017-04-21
Publication date: 2017-10-26
Also published as: TWI630894B; JPWO2017183715A1; CN109068901B; CN109068901A; TW201737848A; JP6692416B2

Abstract

The purpose of the present invention is to provide a shower head for which the number of members for maintaining watertightness is low, which can simply and stably maintain watertightness, and which can suppress the occurrence of damage due to excessive pressure building up inside the shower head, even in cases such as where a water processing cartridge becomes clogged. Provided is a shower head comprising: a shower head body (10) comprising a grip (18) and a head part (20); a shower cap (12) comprising a water diffusing plate (42); a water processing cartridge (100) the inside of which is filled with a purification material (104); and an annular gasket (16). The gasket (16) includes: a first flat surface (16a) formed on the inner side; a second flat surface (16b) facing the back-surface side of the head unit (20); and a third flat surface (16c) facing the water diffusing plate (42) side. The first flat surface (16a) is in close contact with the water processing cartridge (100), the second flat surface (16b) is in close contact with the head part (20), and the third flat surface (16c) is in close contact with the water diffusing plate (42). Each of a primary side and a secondary side of the foregoing close contact portions are isolated so as to be watertight with respect to each other. On the outside of the gasket (16), a groove (17c) is formed in the circumferential direction of the gasket (16).

Description

shower head

The present invention relates to a shower head.
This application claims priority based on Japanese Patent Application No. 2016-086141 filed in Japan on April 22, 2016, and priority based on Japanese Patent Application No. 2016-086142 filed on April 22, 2016 in Japan. These contents are incorporated herein by reference.

The raw water supplied to showers used in bathrooms, washstands, barbers, beauty salons, etc. in ordinary households is usually tap water. However, since tap water contains a lot of residual chlorine, frequent washing of the hair and body with a shower may cause damage or discoloration of the hair or rough skin.

Therefore, a shower head including a water treatment cartridge filled with a dechlorinating agent such as calcium sulfite having a dechlorination function has been proposed. For example, a shower head in which a shower cap is mounted on the front side of the head part of the shower head body, a water treatment cartridge is accommodated in the head part, and a primary side and a secondary side in the head part are watertightly separated by an O-ring. (Patent Document 1).

JP 2000-271033 A

In a conventional shower head such as Patent Document 1, an O-ring that normally separates the primary side and the secondary side of the water treatment cartridge in the head portion in a watertight manner is used. For example, an O-ring is provided to prevent water from leaking from the gap between the head portion and the shower cap or the gap between the main body portion of the shower cap and the watering plate. As described above, a plurality of O-rings are used in the conventional shower head, the structure is complicated, and assembly is required to be performed carefully to ensure stable watertightness, which is complicated.

An object of the present invention is to provide a shower head that has a small number of members for ensuring water tightness, and can simply and stably secure water tightness.

Furthermore, in the conventional shower head as in Patent Document 1, the shower head may be damaged due to an excessively high pressure inside the water treatment cartridge when it is clogged.

An object of the present invention is to provide a shower head capable of suppressing the occurrence of breakage due to excessive pressure inside even when a water treatment cartridge is clogged.

The present invention provides a shower head having the following configuration.
[1] A shower head body including a grip and a head portion provided at a tip of the grip, a shower cap including a water spray plate attached to the front side of the head portion, and housed in the head portion and purified inside A water treatment cartridge filled with a material and an annular packing, wherein the packing has a first plane formed over the entire circumference inside the packing, and an entire circumference on the side facing the back surface of the head portion. A second plane formed over the entire circumference on the side directed to the water spray plate, the first plane is in close contact with the water treatment cartridge, and the second plane is A shower head, which is in close contact with the head portion, wherein the third plane is in close contact with the watering plate, and a primary side and a secondary side of each of the close contact portions are separated in a watertight manner.
[2] The shower head according to [1], wherein a groove is formed outside the packing in a circumferential direction of the packing.
[3] The shower head according to [2], wherein the groove is formed on the outer periphery of the packing over the entire circumference.
[4] The shower head according to any one of [1] to [3], wherein the flat surface is formed in a part of the inside of the packing.
[5] The shower head according to any one of [1] to [4], wherein a structure for attaching the shower cap to the head portion is a bayonet type, and the opening torque and the closing torque are both 100 N · cm or less. .
[6] The shower cap includes a cylindrical side wall and a water spray plate provided so as to close a front end opening on the front side of the side wall, and the outer portion where the groove of the packing is formed is Close contact with the inner surface of the side wall of the shower cap, and when a water pressure of 0.75 MPa or more is applied, the outer portion of the packing is deformed in the direction from the back to the front, creating a gap between the packing and the side wall. The shower head according to any one of [1] to [5], wherein the raw water passes through the gap and leaks to the outside of the shower head through the gap between the water spray plate and the side wall portion of the shower cap. .
[7] Any one of [1] to [6], wherein a friction coefficient of a ground contact surface of the packing that contacts the inside of the shower cap is larger than a friction coefficient of the first plane that contacts the water treatment cartridge. Crab shower head.

The shower head of the present invention has a small number of members for ensuring watertightness, and can easily and stably secure watertightness.
Further, with the shower head of the present invention, even when the water treatment cartridge is clogged, it is possible to prevent the inside from becoming excessively high in pressure and causing damage.

It is sectional drawing which showed an example of the shower head of this invention. It is sectional drawing which showed an example of the shower head of this invention. It is sectional drawing to which the packing part in the shower head of FIG. 1 was expanded. It is sectional drawing to which the packing part in the shower head of FIG. 2 was expanded. It is sectional drawing which showed a mode that packing was deform | transformed by the water pressure in FIG. It is a side view of the water treatment cartridge in the shower head of FIG.1 and FIG.2.

Hereinafter, an example of the shower head of the present invention will be shown and described.
As shown in FIGS. 1 to 4, the shower head 1 according to the present embodiment includes a shower head body 10, a shower cap 12, a water treatment cartridge 100, and a packing 16.

(Shower head body)
The shower head main body 10 includes a grip 18 and a head portion 20 provided at the tip of the grip 18.
The grip 18 is not particularly limited, and includes a grippable cylindrical shape that can be connected to a shower hose or the like at the lower end.

The head portion 20 has a circular shape when viewed from the front, and is provided so as to protrude to the front side with respect to the grip 18. Inside the head part 20, a storage part 22 for storing the water treatment cartridge 100, which is a hollow part communicating with the flow path 18 a in the grip 18, is formed.

A plurality of plate-like support portions 24 that are in contact with and support the water treatment cartridge 100 stored in the storage portion 22 are provided on the back side of the storage portion 22 in the head portion 20. The plurality of support portions 24 are provided at intervals along the inner peripheral wall so as to protrude toward the center along the inner peripheral wall when the head portion 20 is viewed from the front. In the state where the water treatment cartridge 100 is housed in the housing portion 22, the front end portion of the head portion 20 in the support portion 24 comes into contact with the water treatment cartridge 100.
In addition, the shape of a support part is not limited to plate shape. Moreover, the number of support parts is not particularly limited, and can be determined as appropriate. For example, one support part formed continuously over the entire circumference along the inner peripheral wall when the head part 20 is viewed from the front may be provided on the back side of the storage part 22 in the head part 20.

The front end portion 28 on the front side of the head portion 20 includes a cylindrical first peripheral wall portion 30 and a cylindrical second peripheral wall portion 32 surrounding the first peripheral wall portion 30, and has a double structure over the entire periphery. Yes.
That is, the front end portion 28 of the head portion 20 has a double structure in which the first peripheral wall portion 30 and the second peripheral wall portion 32 are provided in this order from the inside when the head portion 20 is viewed from the front. The 1st surrounding wall part 30 and the 2nd surrounding wall part 32 are provided mutually spaced apart, and the clearance gap is formed among them.
A plurality of ridges 34 extending in the circumferential direction are partially provided on the outer wall surface of the inner first peripheral wall portion 30.

The groove | channel 36 is provided in the front end side rather than the protruding item | line 34 in the outer wall surface of the 1st surrounding wall part 30 over the perimeter. An O-ring 38 is attached to the groove 36.

(Shower cap)
The shower cap 12 includes a cylindrical side wall portion 40 and a disc-shaped water spray plate 42 provided so as to close the front end opening on the front side of the side wall portion 40. A plurality of concave portions 44 respectively corresponding to the plurality of ridges 34 provided on the first peripheral wall portion 30 of the head portion 20 are partially formed on the inner wall surface of the side wall portion 40 on the rear end side opposite to the water spray plate 42. Is provided. The shape of the concave portion 44 when the inner wall surface of the side wall portion 40 is viewed from the front is a shape that extends from the edge of the side wall portion 40 opposite to the water spray plate 42 toward the water spray plate 42 and is bent vertically in the circumferential direction. ing.

The rear end portion of the side wall 40 opposite to the water spray plate 42 is located between the first peripheral wall portion 30 and the second peripheral wall portion 32 of the head portion 20 when the shower cap 12 is mounted on the front side of the head portion 20. Inserted into. At this time, the rear end portion of the side wall portion 40 is placed between the first peripheral wall portion 30 and the second peripheral wall portion 32 so that the ridges 34 provided on the first peripheral wall portion 30 of the head portion 20 fit into the concave portions 44. insert. Then, the shower cap 12 is rotated in the circumferential direction, and the ridge 34 is moved to the back side of the portion extending in the circumferential direction in the recess 44. Thus, the shower cap 12 is locked in a state where the shower cap 12 is mounted on the head portion 20 by fitting the projection 34 into the recess 44.

In this state, the space between the side wall portion 40 of the shower cap 12 and the first peripheral wall portion 30 of the head portion 20 is sealed watertight by the O-ring 38.

In the present invention, the mounting structure of the shower cap on the head portion is preferably a bayonet type as in this example. If the mounting structure of the shower cap is a bayonet type, it is easier to mount and remove the shower cap compared to mounting by screwing. Therefore, even if soap or shampoo is attached to the hand when the cartridge is replaced, the shower cap can be easily removed and the cartridge can be replaced.

The water spray plate 42 includes a disc portion 42a, a cylindrical portion 42b that rises from the periphery of the disc portion 42a over the entire circumference, and a flange portion 42c that projects outward from the tip of the cylindrical portion 42b over the entire circumference. The water spray plate 42 is fitted into the front end portion of the side wall portion 40 so that the disc portion 42a is on the front side and the flange portion is on the back side. A plurality of water spray holes 42 d are formed in the disc portion 42 a of the water spray plate 42. The number of water spray holes 42d in the water spray plate 42 is not particularly limited and can be determined as appropriate. Further, the distribution pattern of the water spray holes 42d in the water spray plate 42 is not particularly limited, and a known pattern can be adopted.

The material of the shower head body 10 and the shower cap 12 is not particularly limited, and a known material used for the shower head can be employed. Specific examples include heat-resistant resins having a softening point of 80 ° C. or higher, such as polypropylene, polyphenylene ether, polyoxymethylene, polycarbonate, ABS, ASA, and PMP resin, and metals such as stainless steel.
The manufacturing method of the shower head main body 10 and the shower cap 12 is not specifically limited, A well-known molding method etc. are employable.

(Water treatment cartridge)
As shown in FIGS. 1 and 2 and FIG. 6, the water treatment cartridge 100 includes a cartridge main body 102 and a purification material 104 filled in the cartridge main body 102.
The cartridge main body 102 has a cylindrical body 110, a disk-shaped first plate part 112 provided so as to close one opening end of the body 110, and the other opening end of the body 110. And a disk-shaped second plate portion 114 provided on the surface. In the head portion 20, the first plate portion 112 faces the primary side, and the second plate portion 114 faces the secondary side.

The first plate portion 112 and the second plate portion 114 each have a curved shape so that the central portion protrudes outward from the outside when viewed from the front. In the first plate portion 112 and the second plate portion 114,

circular recesses

115, 117 are formed in the central portion when they are viewed from the outside, and a plurality of circular openings 116, around them. 118 is formed.

On the inner wall surface 112 a of the first plate portion 112, an annular projecting portion 120 that rises along the trunk portion 110 from the side of the trunk portion 110 is provided. An annular projecting portion 121 is also provided at the central portion of the inner wall surface 112 a of the first plate portion 112. Inside the first plate portion 112, the filter 122 is attached so as to cover all the openings 116 and along the inner wall surface 112a in a state where the protruding portions 120 and the tip portions of the protruding portions 121 are welded. Yes. Similarly, on the inner side of the second plate portion 114, an annular protrusion 124 rising along the trunk portion 110 from the side of the trunk portion 110 on the inner wall surface 114a of the second plate portion 114, and an annular projection rising from the center portion. A protruding portion 125 is provided. Also on the inner side of the second plate portion 114, the filter 126 is attached so as to cover all the openings 118 and along the inner wall surface 114a in a state in which the protruding portions 124 and the tip portions of the protruding portions 125 are welded. Yes.

The filter may be any filter as long as it can pass water without passing through the purification material, and examples thereof include a nonwoven fabric and a porous sheet, and a nonwoven fabric is preferable. The material for the non-woven fabric is not particularly limited, and those commonly used for water treatment cartridges can be used.

A step 127 made of an annular groove is formed on the outer peripheral edge portion of the outer wall surface 112b of the first plate portion 112 over the entire circumference. Similarly, on the outer peripheral edge portion of the outer wall surface 114b of the second plate portion 114, a step 128 made of an annular recess is formed over the entire circumference. The water treatment cartridge 100 is stably held by contacting the support portion 24 so as to fit the step 128 in the head portion 20.

The material of the cartridge body is not particularly limited, and a known material used for a water treatment cartridge housed in a shower head can be employed. Specific examples include heat-resistant resins such as polypropylene, polyphenylene ether, polyoxymethylene, polycarbonate, ABS, ASA, and PMP.

The purification material 104 is not particularly limited, and examples thereof include a dechlorination agent, an ion exchange resin, and activated carbon. When removing residual chlorine in the raw water, for example, a granular dechlorinating agent and synthetic fiber mixed and molded, or a powdered dechlorinating agent wrapped with a nonwoven sheet may be used. The dechlorinating agent is not particularly limited, and examples thereof include calcium sulfite and ascorbic acid. The cleaning material 104 may be one type or two or more types.
In addition to the dechlorinating agent, the purification material 104 may contain chemicals such as an odor removing agent, a moisturizing agent, a refreshing agent, and a fragrance.

(Packing)
The packing 16 in this example is mounted so as to be crimped to the inside of the shower cap 12. The packing 16 is an annular packing, and as shown in FIGS. 1 to 4, a main body part 17a having a substantially rectangular cross section perpendicular to the ring and a pentagonal cross section projecting to the inside of the main body part 17a. And a protruding portion 17b having a shape.

The side facing the back surface of the head portion 20 at the tip portion protruding in a V-shape of the convex strip portion 17b is the first flat surface 16a. The side of the main body portion 17a facing the back surface of the head portion 20 is the second plane 16b. The side directed to the water spray plate 42 in the main body portion 17a is a third plane 16c. In this way, the packing 16 is directed to the first flat surface 16a formed on the inner periphery over the entire periphery, the second flat surface 16b formed over the entire periphery on the side directed to the back surface of the head portion 20, and the water spray plate 42. And a third plane 16c formed over the entire circumference on the side.

The friction coefficient of the ground contact surface of the packing 16 that is in contact with the inside of the shower cap 12 is formed to be larger than the friction coefficient of the first flat surface 16 a that is in contact with the water treatment cartridge 100. By having the above-described characteristics, when the cartridge is replaced, the packing remains on the shower cap side instead of the cartridge side, and it is possible to save the trouble of removing the packing from the cartridge and reattaching it to the shower cap, thereby facilitating cartridge replacement.
As a method of increasing the friction coefficient, for example, by making the grounding surface of the packing 16 in contact with the inside of the shower cap 12 larger than the first plane 16a in contact with the water treatment cartridge 100, the friction coefficient of the grounding surface of the packing 16 is increased. The friction coefficient of the first plane 16a can be made larger. Moreover, a fine unevenness | corrugation can be provided in the grounding surface of the packing 16 which contact | connects the inner side of the shower cap 12, and a friction coefficient can be enlarged by giving a catch. Furthermore, a material can be selected such that the friction coefficient of the ground contact surface of the packing 16 that is in contact with the inside of the shower cap 12 is larger than the friction coefficient of the first flat surface 16 a that is in contact with the water treatment cartridge 100.

The first flat surface 16 a of the packing 16 is pressure-bonded over the entire circumference so as to be in close contact with the second plate portion 114 of the body portion 110 in the water treatment cartridge 100. As a result, the primary side and the secondary side of the first flat surface 16a and the close contact portion of the water treatment cartridge 100 are separated from each other in a watertight manner. That is, the primary side and the secondary side of the water treatment cartridge 100 in the head unit 20 are separated from each other in a watertight manner. Therefore, the raw water is prevented from flowing from the primary side of the water treatment cartridge 100 through the gap between the inner wall surface of the head unit 20 and the outer surface of the water treatment cartridge 100 to the water spray plate 42 side.

Inside the packing 16, a recess extending in the circumferential direction of the packing 16 is formed over the entire circumference between the first plane 16a and the second plane 16b. That is, the first plane 16 a is formed on a part of the inside of the packing 16. Thereby, the part which is not closely_contact | adhered to the water treatment cartridge 100 exists in the direction which goes to the front from the back surface of a head part inside packing 16. Thus, in this invention, it is preferable that the flat surface formed in contact with the water treatment cartridge formed over the entire circumference on the inner side of the packing is formed on a part of the inner side of the packing. Thereby, since the operation torque at the time of opening and closing of a shower cap can be made small, opening and closing of a shower cap becomes easy.

On the second flat surface 16 b of the packing 16, a protruding protrusion 31 is provided on the tip of the first peripheral wall portion 30 of the head portion 20 over the entire circumference. As described above, the second flat surface 16 b of the packing 16 is in close contact with the head portion 20 on the back side with respect to the close contact portion between the first flat surface 16 a and the water treatment cartridge 100. Thereby, the primary side and the secondary side of the adhesion part of the 2nd plane 16b and the head part 20 are isolated watertight. That is, the gap between the inner wall surface of the head portion 20 and the outer surface of the water treatment cartridge 100 and the gap between the head portion 20 and the side wall portion 40 of the shower cap 12 are separated in a watertight manner. Therefore, the raw water that has passed through the gap between the inner wall surface of the head portion 20 and the outer surface of the water treatment cartridge 100 from the primary side of the water treatment cartridge 100 passes through the gap between the head portion 20 and the side wall portion 40 of the shower cap 12. Leakage outside is suppressed.

Furthermore, the third flat surface 16c of the packing 16 is in close contact with the flange portion 42c of the water spray plate 42, and the primary side and the secondary side of the close contact portion are watertightly separated. That is, the space on the secondary side of the water treatment cartridge 100 in the shower head 1 and the gap between the water spray plate 42 and the side wall portion 40 are separated in a watertight manner. Thereby, the purified water that has passed through the water treatment cartridge 100 is prevented from leaking out of the shower head 1 through the gap between the water spray plate 42 and the side wall portion 40 in the shower cap 12.

Thus, in the packing 16, the water tightness of three places in the shower head 1 is simultaneously secured by using the three first planes 16a to 16c. Thereby, compared with the case where three O-rings are used in order to ensure the water tightness of each of the three places, the number of members can be reduced, and the structure becomes simpler. In addition, when using three O-rings, it is necessary to align them separately, but in this example, it is only necessary to align the packing 16, so the assembly work is also easy and stable. It is possible to ensure water tightness.

Also, since the packing 16 has higher rigidity than the O-ring, it is difficult to twist when the cartridge is replaced, and since it has excellent wear resistance, it is less likely to be worn or damaged. Therefore, the packing 16 is advantageous in that even if the shower cap 12 is repeatedly opened and closed in order to replace the water treatment cartridge 100, the water tightness of each close contact portion can be sufficiently secured.

A groove 17c is formed in the circumferential direction of the packing 16 on the flat surface 16d outside the main body portion 17a. That is, a groove 17 c is formed outside the annular packing 16 so as to extend in the circumferential direction of the packing 16. Thereby, when a high water pressure is applied to the packing 16 in the direction from the back surface to the front surface, the portion where the groove 17c outside the packing 16 is formed is seen from the back surface as compared with the case where no groove is formed. It is easy to deform so as to collapse in the direction toward the front. The outer portion where the groove 17 c of the packing 16 is formed is in close contact with the inner surface of the side wall portion 40 of the shower cap 12.

If the water treatment cartridge 100 is clogged by forming the groove 17 c in the packing 16, a high water pressure is generated by the raw water that has passed through the gap between the inner wall surface of the head unit 20 and the outer surface of the water treatment cartridge 100. As a result, as shown in FIG. 5, the outer main body portion 17 a of the packing 16 is deformed so as to be crushed in the direction from the back to the front. Therefore, a gap is formed between the second flat surface 16 b of the packing 16 and the protruding portion 31 of the first peripheral wall portion 30 in the head portion 20. The raw water flows outside the packing 16 through the gap and leaks to the outside of the shower head 1 through the gap between the water spray plate 42 and the side wall portion 40 in the shower cap 12. As described above, in the shower head 1, when a high water pressure is applied to the packing 16, the packing 16 is deformed and water leaks to the outside of the shower head 1, so that the inside of the shower head 1 becomes excessively high pressure and the shower head 1 is damaged. Is suppressed.

Further, in the shower head 1, since the groove 16c is formed on the outer side of the packing 16, the packing 16 is easily deformed. Therefore, the torque at the time of opening and closing the shower cap 12 is smaller than when the groove is not formed. Therefore, the opening / closing operation of the shower cap 12 can be easily performed.

In the present invention, when the structure for mounting the shower cap to the head portion is a bayonet type, both the opening torque and the closing torque are preferably 100 N · cm or less, and more preferably 80 N · cm or less. The opening torque and closing torque can be adjusted by adjusting the length, width and depth of the groove formed on the outside of the packing.

In the present invention, it is preferable that the groove is formed on the outer side of the packing over the entire circumference. As a result, the outer portion of the packing is easily deformed in the direction from the back surface to the front surface over the entire circumference, so that the effect of releasing the pressure by deforming the packing when high water pressure is applied is enhanced. In addition, as long as the effect of this invention is not impaired, the groove | channel does not need to be formed in the outer periphery of packing over the perimeter, for example, may be intermittently formed in the circumferential direction of packing.

The cross-sectional shape of the groove formed on the outside of the packing is a semicircle in this example. Note that the cross-sectional shape of the groove formed on the outer side of the packing may be a shape other than a semicircular shape such as a rectangular shape or a triangular shape.

The depth and width of the groove formed on the outer side of the packing is sufficient to secure the water tightness of the close contact portion between the second flat surface of the packing and the head portion, and when the high pressure is applied, the outer portion of the packing is What is necessary is just to adjust suitably according to the thickness of packing so that it may deform | transform in the direction which goes to the front. In the present invention, it is preferable to adjust the depth and width of the groove so that when the water pressure of 0.75 MPa or more is applied, the outer portion of the packing is deformed so as to be crushed in the direction from the back to the front. Thereby, it becomes easy to make compatible the water tightness of the contact | adherence part of the 2nd flat surface of a packing and head part at the time of normal use, and the effect of releasing internal pressure, such as when a water treatment cartridge is clogged.

Note that the cross-sectional shape of the packing is such that the first plane, the second plane, and the third plane are formed and the watertightness can be secured by these planes, and grooves are formed on the outside. The shape is not limited to this example, and may be, for example, a pentagon or a hexagon.

The material of the packing is not particularly limited, and a material used for a known packing having elasticity can be used. Specific examples of the material of the packing include, for example, nitrile rubber, fluorine rubber, silicone rubber, ethylene propylene rubber, urethane rubber, and those obtained by applying Teflon (registered trademark) coating to the material. Of these, ethylene propylene rubber is preferred from the viewpoint of weather resistance, chemical resistance, and abrasion resistance. Further, from the viewpoint of heat resistance and oxidation resistance, those obtained by peroxide vulcanization are more preferable. Furthermore, the hardness of the packing is optimally 70 degrees or less from the operability of the shower cap. As the material for the packing, one type may be used alone, or two or more types may be used in combination.

In the shower head 1, the entire amount of raw water that has flowed into the head portion 20 through the flow path 18 a of the grip 18 flows into the water treatment cartridge 100 and is purified, and is sprayed from the water spray holes 42 d of the water spray plate 42 in a shower shape. The In the present invention, as in this example, it is preferable that the water treatment cartridge is accommodated in the shower head so that the entire amount of raw water flowing into the shower head passes through the interior of the water treatment cartridge. This makes it possible to reduce the residual chlorine concentration of purified water sprayed from the water spray plate as compared with a conventional shower head in which a bypass flow path is provided around the water treatment cartridge to circulate part of the raw water from the primary side to the secondary side. It can be lowered uniformly.

As described above, in the shower head of the present invention, the first flat surface of the packing is in close contact with the water treatment cartridge, the second flat surface is in close contact with the head portion, and the third flat surface is in close contact with the water spray plate. The primary side and the secondary side of the contact portion are separated in a watertight manner. Therefore, compared with the aspect which arrange | positions an O-ring in each location and ensures watertightness, there are few members for ensuring watertightness, and it can ensure watertightness simply and stably.

Moreover, in the shower head of this invention, the plane formed inside the packing is closely_contact | adhered to the water treatment cartridge, and the groove | channel is formed in the outer side of the said packing.
Therefore, during normal use, the water-tightness of the primary and secondary sides of the water treatment cartridge in the head is ensured, and when the water treatment cartridge is clogged, the packing is deformed and the inside is excessive. It is suppressed that the shower head is damaged due to high pressure. In addition, since the groove is formed on the outer side of the packing, the packing is easily deformed. Therefore, the torque at the time of opening and closing the shower cap is small, and the shower cap can be easily opened and closed.
The opening and closing of the shower cap is mainly performed when the water treatment cartridge is replaced, but it can be easily performed even with wet hands during the shower. In addition, since the shower head of the present invention is sealed with a flat packing, the shower cap can be easily opened and closed even when the water treatment cartridge is frequently replaced, and the sealed state is stably maintained. On the other hand, a shower cap sealed with an O-ring tends to twist when the shower cap is frequently opened and closed, and there is a risk that the sealing performance is insufficient as compared with the flat packing of the present invention.

The shower head of the present invention is not limited to the shower head 1 described above. In the present invention, the packing may not be attached to the inside of the shower cap, and may be attached to the head portion of the shower head main body, for example.
Moreover, the shower head of this invention may be equipped with a well-known water treatment cartridge. A well-known aspect may be employ | adopted also about a shower head main body and a shower cap, and a shower cap may be screwed and attached to a head part by a screw type.

EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited by the following description.
[Example 1]
The shower head 1 illustrated in FIGS. 2 and 4 was produced. In the packing 16, the width of the flat surface 16d outside the ridge 17b is 2 mm, the distance from the flat surface 16d to the tip of the ridge 17b is 5.7 mm, the width of the groove 17c is 3 mm, and the depth is 2.5 mm. did. The groove 17c was formed outside the packing 16 over the entire circumference. As a material for forming the packing 16, ethylene propylene rubber was used and the hardness was set to 70 degrees.

[Comparative Example 1]
A shower head similar to that of Example 1 was manufactured except that a packing having the same form as the packing 16 was provided except that the groove 17c was not formed on the flat surface 16d.

[Measurement of opening torque and closing torque]
About the shower head of each example, the opening torque at the time of opening and closing a shower cap and the closing torque were measured using the opening torque meter (the SHIMPO company make, TNK series). Each measurement was performed 5 times, and the average value was calculated. The results are shown in Table 1.

As shown in Table 1, in the shower head of Example 1 in which a groove is formed on the outside of the packing, the opening torque and the closing torque are small compared to the shower head of Comparative Example 1 in which the groove is not formed. The shower cap was easy to open and close.

The number of members for securing water tightness is small, and water tightness can be secured easily and stably. Also, even when the water treatment cartridge is clogged, the internal pressure becomes excessively high and damage occurs. A shower head that can be suppressed can be provided.

DESCRIPTION OF SYMBOLS 1 Shower head 10 Shower head main body 12 Shower cap 16 Packing 16a 1st plane 16b 2nd plane 16c 3rd plane 16d Plane 17a Main body part 17b Projection part 17c Groove 18 Grip 20 Head part 40 Side wall part 42 Sprinkling plate 100 Water treatment cartridge 102 Cartridge body 104 Purification material

Claims

Shower head body provided with a grip and a head portion provided at the tip of the grip, a shower cap provided with a water spray plate attached to the front side of the head portion, and housed in the head portion and filled with a purifier A water treatment cartridge and an annular packing,
The packing has a first plane formed over the entire circumference on the inner side of the packing, a second plane formed over the entire circumference on the side directed to the back surface of the head portion, and all on the side directed to the water spray plate. A third plane formed over the circumference,
The first plane is in close contact with the water treatment cartridge, the second plane is in close contact with the head portion, the third plane is in close contact with the watering plate, and the primary side and the secondary side of the respective close contact portions are Shower head, watertightly isolated.
The shower head according to claim 1, wherein a groove is formed on the outer side of the packing in a circumferential direction of the packing.
The shower head according to claim 2, wherein the groove is formed on the entire outer periphery of the packing.
The shower head according to any one of claims 1 to 3, wherein the flat surface is formed at a part of the inside of the packing.
The shower head according to any one of claims 1 to 4, wherein a structure in which the shower cap is attached to the head portion is a bayonet type, and the opening torque and the closing torque are both 100 N · cm or less.
The shower cap includes a cylindrical side wall and a watering plate provided to close the front end opening on the front side of the side wall,
The outer part of the packing in which the groove is formed is in close contact with the inner surface of the side wall of the shower cap,
When a water pressure of 0.75 MPa or more is applied, the outer portion of the packing is deformed in the direction from the back to the front, creating a gap between the packing and the side wall, and raw water passes through the gap, and the shower cap The shower head according to any one of claims 1 to 5, wherein the shower head leaks to the outside of the shower head through a gap between the water spray plate and the side wall portion.
The friction coefficient of the ground contact surface of the packing that contacts the inside of the shower cap is larger than the friction coefficient of the first plane that contacts the water treatment cartridge. Shower head.