TWI630894B - Showerhead - Google Patents

Abstract

The present invention provides a shower head with a small number of components to ensure watertightness, which can easily and stably ensure watertightness, and can prevent the internal pressure from becoming excessively high even when the water treatment cartridge is clogged, etc. damaged. The shower head includes: a shower head body with a handle and a head, a shower cover with a sprinkler plate, a water treatment filter cartridge filled with a purification material inside, and a ring-shaped pad, the pad has a first formed on the inner side 1 plane, the 2nd plane facing the back side of the head, and the 3rd plane facing the sprinkler side, the first plane is in close contact with the water treatment cartridge, the second plane is in close contact with the head, and the third plane is in close contact with On the sprinkler board, the primary side and the secondary side of each closely-coupled portion are watertightly separated, and a groove is formed in the circumferential direction of the pad on the outer side of the pad.

Description

shower head

The 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 in Japan on April 22, 2016 , And the contents of these are cited in this application.

The raw water used in the shower used in the bathroom, washstand, grooming salon, beauty salon, etc. of general households is usually tap water. However, since tap water contains a lot of residual chlorine, if you frequently wash your hair or body with a shower, hair may be damaged or discolored, or rough skin may occur.

Therefore, there is proposed a shower head equipped with a water treatment cartridge filled with a dechlorination agent such as calcium sulfite having a dechlorination function. For example, a shower cover is installed on the front side of the head of the shower head body, a water treatment cartridge is accommodated in the head, and the primary and secondary sides in the head are provided with O-rings A shower head that is watertightly isolated (Patent Document 1). [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2000-271033

[Problems to be Solved by the Invention] In the conventional shower head like Patent Document 1, an O-ring that water-tightly isolates the primary side and the secondary side of the water treatment cartridge in the head is generally used. For example, for watertightness, an O-ring is provided to prevent water from leaking from the gap between the head and the shower cover, or the gap between the body portion of the shower cover and the sprinkler. In this way, the use of multiple O-rings in the previous shower head has a complicated structure, and in order to stably ensure watertightness, it must be carefully assembled and complicated.

An object of the present invention is to provide a shower head having a small number of members for ensuring watertightness, which can easily and stably ensure watertightness.

Furthermore, in the conventional shower head like Patent Document 1, when the water treatment cartridge is clogged, etc., the internal pressure may become too high, thereby causing damage to the shower head.

An object of the present invention is to provide a shower head capable of suppressing damage to the internal pressure from becoming too high even when the water treatment cartridge is clogged. [Means to solve the problem]

The present invention provides a shower head having the following configuration. [1] A shower head comprising: a shower head body with a handle and a head provided at the front end of the handle; a shower cover mounted on the front side of the head and equipped with a sprinkler; water treatment The filter cartridge is housed in the head and filled with purification material; and a ring-shaped gasket; the gasket has a first plane formed on the inner side of the gasket over the entire circumference, facing A second plane formed on the back side of the head over the entire circumference, and a third plane formed on the side facing the sprinkler plate over the entire circumference, the first plane being in close contact with the water treatment filter On the cylinder, the second plane is in close contact with the head, the third plane is in close contact with the sprinkler plate, and the primary side and the secondary side of each closely-contacted portion are watertightly isolated. [2] The shower head according to [1], wherein a groove is formed in the circumferential direction of the pad on the outer side of the pad. [3] The shower head according to [2], wherein the groove is formed over the entire circumference of the outside of the pad. [4] The shower head according to any one of [1] to [3], wherein the flat surface is formed in a part of the inner side of the pad. [5] The shower head according to any one of [1] to [4], wherein the installation structure of the shower cover toward the head is a bayonet type, opening torque and The closing torque is 100 N · cm or less. [6] The shower head according to any one of [1] to [5], wherein the shower cover is provided with a cylindrical side wall portion, and is provided so as to seal the front end opening of the front side of the side wall portion The sprinkler, the outer part of the liner where the groove is formed is in close contact with the inner surface of the side wall part of the shower cover, and when subjected to a water pressure of 0.75 MPa or more, Partly deformed in the direction from the back toward the front and creates a gap between the gasket and the side wall portion, the raw water passes through the gap, and passes through the sprinkler plate and the side wall portion of the shower cover Leaked to the outside of the shower head. [7] The shower head according to any one of [1] to [6], wherein the friction coefficient ratio of the grounding surface of the pad contacting the inside of the shower cover is different from that of the water treatment cartridge The friction coefficient of the first plane in contact is large. [Effect of invention]

The shower head of the present invention has a small number of members for ensuring water tightness, and can easily and stably ensure water tightness. In addition, according to the shower head of the present invention, even when the water treatment cartridge is clogged, it is possible to suppress the internal pressure from becoming too high and causing damage.

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

(Shower Head Body) The shower head body 10 includes a grip 18 and a head 20 provided at the front end of the grip 18. The grip 18 is not particularly limited, and examples thereof include a gripper-shaped tube that can connect a lower end to a shower hose or the like.

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

On the back side of the storage portion 22 in the head portion 20, a plurality of plate-shaped support portions 24 are provided that abut on and support the water treatment cartridge 100 stored in the storage portion 22. The plurality of support portions 24 are provided along the inner peripheral wall with a space therebetween so as to protrude toward the center along the inner peripheral wall when the head 20 is viewed from the front. In a state where the water treatment cartridge 100 is stored in the storage section 22, the front end portion of the front side of the head 20 in the support section 24 abuts on the water treatment cartridge 100. Furthermore, the shape of the support portion is not limited to the plate shape. In addition, the number of support portions is not particularly limited, and can be determined as appropriate. For example, one support portion formed continuously along the entire peripheral wall along the inner peripheral wall when the head portion 20 is viewed from the front may be provided on the back side of the storage portion 22 in the head portion 20.

The front end portion 28 of the head 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 throughout the entire circumference. That is, when the head portion 20 is viewed from the front, 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. The first peripheral wall portion 30 and the second peripheral wall portion 32 are provided apart from each other, and a gap is formed between the two. A plurality of ridges 34 extending in the circumferential direction are partially provided on the outer wall surface of the inner first circumferential wall portion 30.

A groove 36 is provided on the distal end side of the convex strip 34 on the outer wall surface of the first peripheral wall portion 30 over the entire circumference. An O-ring 38 is installed in the groove 36.

(Shower cover) The shower cover 12 includes a cylindrical side wall portion 40 and a disc-shaped sprinkler 42 provided so as to seal the front end opening of the front side of the side wall portion 40. On the inner wall surface of the side wall portion 40 on the rear end side opposite to the sprinkler 42, a plurality of ribs 34 corresponding to the first peripheral wall portion 30 provided on the head 20 are partially provided 'S multiple recesses 44. The shape of the recessed portion 44 when viewed from the front of the inner wall surface of the side wall portion 40 is a shape extending from the edge of the side wall portion 40 opposite to the sprinkler plate 42 toward the sprinkler plate 42 and further perpendicularly in the circumferential direction bending.

When the shower cover 12 is attached to the front side of the head 20, the rear end portion of the side wall portion 40 opposite to the sprinkler 42 is inserted into the first and second peripheral wall portions 30 and 32 of the head portion 20 between. At this time, the rear end side portion of the side wall portion 40 is inserted into the first and second peripheral wall portions 30 and 32 so that the convex strip 34 provided on the first peripheral wall portion 30 of the head 20 is fitted into the concave portion 44. between. Then, the shower cover 12 is rotated in the circumferential direction, and the convex strip 34 is moved toward the back side of the portion of the concave portion 44 that extends in the circumferential direction. By fitting the convex strip 34 into the concave portion 44 as described above, the shower cover 12 is locked in a state of being mounted on the head 20.

In this state, between the side wall portion 40 of the shower cover 12 and the first peripheral wall portion 30 of the head 20 is sealed with a O-ring 38 in a watertight manner.

In the present invention, the mounting structure of the shower cover toward the head is preferably a plug-in type as in this example. If the installation structure of the shower cover is a plug-in type, installation and removal of the shower cover becomes easier than installation by screwing. Therefore, even when soap, shampoo, etc. are attached to the hand when the filter cartridge is replaced, the shower cap can be easily removed to replace the filter cartridge.

The sprinkler 42 includes a circular plate portion 42a, a cylindrical portion 42b that rises over the entire circumference from the peripheral edge of the circular plate portion 42a, and a flange portion 42c that extends outward from the tip of the cylindrical portion 42b over the entire circumference . The sprinkler 42 is fitted into the front end portion of the side wall portion 40 such that the circular plate portion 42a becomes the front side and the flange portion becomes the back side. A plurality of sprinkler holes 42d are formed in the circular plate portion 42a of the sprinkler plate 42. The number of sprinkling holes 42d in the sprinkling plate 42 is not particularly limited, and can be determined as appropriate. In addition, the distribution pattern of the sprinkling holes 42d in the sprinkler 42 is not particularly limited, and a well-known pattern can be used.

The materials of the shower head body 10 and the shower cover 12 are not particularly limited, and known materials used in the shower head can be used. Specifically, for example, polypropylene, polyphenylene ether, polyoxymethylene, polycarbonate, Acrylonitrile-Butadiene-Styrene (ABS), acrylate-styrene-acrylonitrile ( Acrylate-Styrene-Acrylonitrile (ASA), Polymethylpentene (PMP) resins and other heat-resistant resins with softening points above 80 ° C, or metals such as stainless steel. The method of manufacturing the shower head body 10 and the shower cover 12 is not particularly limited, and a known molding method or the like can be used.

(Water Treatment Cartridge) As shown in FIGS. 1 to 2 and 6, the water treatment cartridge 100 includes a cartridge body 102 and a purification material 104 filled in the cartridge body 102. The cartridge body 102 includes a cylindrical body portion 110, a disc-shaped first plate portion 112 provided so as to seal one open end of the body portion 110, and a closed end of the other open end of the body portion 110 sealed Disc-shaped second plate portion 114 provided in a manner. 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 shape that is curved so that the central portion protrudes toward the outside when viewed from the outside from the front. In the first plate portion 112 and the second plate portion 114, a circular concave portion 115 and a concave portion 117 are formed in the central portion when the two are viewed from the outside in a front view, and a plurality of circular Opening 116, opening 118.

On the inner wall surface 112a of the first plate portion 112, an annular protrusion 120 that rises along the body portion 110 from the side of the body portion 110 is provided. An annular protruding portion 121 is also provided at the central portion of the inner wall surface 112a 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 front end portions of the protruding portion 120 and the protruding portion 121 are welded. Inside the second plate portion 114, an annular protruding portion 124 that rises along the body portion 110 from the side of the body portion 110 in the inner wall surface 114a of the second plate portion 114 is similarly provided, and from An annular protruding portion 125 that rises from the center portion. A filter 126 is attached to the inner side of the second plate portion 114 so as to cover all the openings 118 in a state where the front end portions of the protruding portion 124 and the protruding portion 125 are welded, and along the inner wall surface 114a .

The filter may be any one that cannot pass the purification material and can pass water. Examples of the filter include nonwoven fabrics and porous sheets, and nonwoven fabrics are preferred. The material of the non-woven fabric is not particularly limited, and those commonly used in water treatment cartridges can be used.

The outer peripheral edge portion on the outer wall surface 112b of the first plate portion 112 is formed with a step 127 including an annular concave strip over the entire circumference. Similarly, the outer peripheral edge portion on the outer wall surface 114b of the second plate portion 114 is formed with a step 128 including an annular concave strip over the entire circumference. In the head portion 20, the support portion 24 abuts in a manner of being embedded in the step 128, thereby stably holding the water treatment cartridge 100.

The material of the cartridge body is not particularly limited, and a well-known material used in a water treatment cartridge stored in a shower head can be used. 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, ion exchange resin, and activated carbon. When removing the residual chlorine in the raw water, for example, a granular dechlorinating agent and a synthetic fiber are mixed and formed, and a non-woven fabric sheet is used to wrap the powder in the dechlorinating agent. The dechlorination agent is not particularly limited, and examples thereof include calcium sulfite and ascorbic acid. The purification material 104 may be one kind, or two or more kinds. In addition to the dechlorination agent, the purification material 104 may contain odor removing agents, moisturizing agents, cooling agents, fragrances, and other chemicals.

(Padding) The gasket 16 of this example is attached so as to be pressure-contacted to the inside of the shower cover 12. The gasket 16 is an annular gasket. As shown in FIGS. 1 to 4, it has a body portion 17 a having a substantially rectangular cross-sectional shape perpendicular to the ring, and a cross-sectional shape protruding inward of the body portion 17 a is a pentagon The convex portion 17b of the shape.

The side of the front end portion of the protruding strip portion 17b that protrudes into a V shape facing the back surface of the head portion 20 becomes the first flat surface 16a. The side of the body portion 17a facing the back surface of the head 20 becomes the second flat surface 16b. The side of the body portion 17a facing the sprinkler 42 becomes the third flat surface 16c. In this way, the gasket 16 has a first flat surface 16 a formed on the inner side over the entire circumference, a second flat surface 16 b formed on the side facing the back of the head 20 over the entire circumference, and a full surface on the side facing the sprinkler 42 The third plane 16c formed around the circumference.

The friction coefficient of the grounding surface of the gasket 16 that is in contact with the inside of the shower cover 12 is larger than the friction coefficient of the first plane 16 a that is in contact with the water treatment cartridge 100. With the above features, when the filter cartridge is replaced, the gasket remains on the side of the shower cover instead of the cylinder side, which saves the labor and time of removing the gasket from the filter cartridge and reinstalling it on the shower cover. Replacement becomes easy. As a method of increasing the coefficient of friction, for example, the pad 16 may be made to contact the inside of the shower cover 12 with a larger grounding surface than the first flat surface 16a that is in contact with the water treatment cartridge 100. The friction coefficient of the ground contact surface is larger than the friction coefficient of the first plane 16a. In addition, it is possible to provide fine irregularities on the ground surface of the gasket 16 that comes in contact across the inside of the shower cover 12 so as to have stagnation to increase the friction coefficient. Furthermore, a material having a larger friction coefficient than the first plane 16a in contact with the water treatment cartridge 100 may be selected as the friction coefficient of the grounding surface of the gasket 16 that contacts the inside of the shower cover 12.

The first flat surface 16a of the gasket 16 is in close contact with the second plate portion 114 of the body portion 110 in the water treatment cartridge 100, and is pressure-bonded over the entire circumference. Thereby, the primary side and the secondary side of the adjoining portion of the first plane 16a and the water treatment cartridge 100 are watertightly isolated. That is, the primary side and the secondary side of the water treatment cartridge 100 in the head 20 are watertightly isolated. Therefore, it is suppressed that the raw water passes through the gap between the inner wall surface of the head 20 and the outer surface of the water treatment cartridge 100 from the primary side of the water treatment cartridge 100, and then enters the sprinkler 42 side.

On the inner side of the pad 16, a depression extending in the circumferential direction of the pad 16 is formed between the first plane 16 a and the second plane 16 b over the entire circumference. That is, the first plane 16a is formed on a part of the inner side of the pad 16. Thereby, on the inner side of the gasket 16, there is a portion that is not tightly attached to the water treatment cartridge 100 in a direction from the back of the head toward the front. In this way, in the present invention, it is preferable that a plane formed on the inner side of the gasket over the entire circumference and in close contact with the water treatment cartridge is formed in a part of the inner side of the gasket. As a result, the operating torque when opening and closing the shower cover can be reduced, so the opening and closing of the shower cover becomes easy.

The protruding portion 31 of the convex strip provided at the front end of the first circumferential wall portion 30 in the head 20 over the entire circumference is crimped to the second flat surface 16b of the packing 16. In this manner, the second flat surface 16b of the gasket 16 is in close contact with the head portion 20 on the back side of the close contact portion between the first flat surface 16a and the water treatment cartridge 100. Thereby, the primary side and the secondary side of the adhering portion of the second plane 16b and the head 20 are watertightly isolated. That is, the gap between the inner wall surface of the head 20 and the outer surface of the water treatment cartridge 100 and the gap between the head 20 and the side wall portion 40 of the shower cover 12 are watertightly separated. Therefore, it is suppressed that the raw water passes through the gap between the inner wall surface of the head 20 and the outer surface of the water treatment cartridge 100 from the primary side of the water treatment cartridge 100, and then passes through the side wall portion of the head 20 and the shower cover 12 The gap of 40 leaking out of the shower head 1 is suppressed.

Furthermore, the third flat surface 16c of the gasket 16 is in close contact with the flange portion 42c of the sprinkler plate 42, and the primary side and the secondary side of the 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 sprinkler 42 and the side wall portion 40 are watertightly isolated. This prevents the purified water passing through the water treatment cartridge 100 from leaking to the outside of the shower head 1 through the gap between the sprinkler 42 in the shower cover 12 and the side wall portion 40.

In this way, in the pad 16, the three planes of the first plane 16 a to the third plane 16 c are used to simultaneously ensure the watertightness of three places in the shower head 1. By this, compared with the case where three O-rings are used to ensure the watertightness of each of the three parts, the number of components can be reduced, and the structure becomes simpler. In addition, when using three O-rings, these alignments must be performed separately. However, in this example, only the alignment of the gasket 16 is required, so the assembly work is also easy, and the stability of each part can be ensured stably. Watertight.

In addition, because the rigidity of the gasket 16 is higher than that of the O-ring, it is difficult to twist when the filter cartridge is replaced, and the wear resistance is excellent, so that it is difficult to cause wear or damage. Therefore, even if the shower cover 12 is opened and closed repeatedly to replace the water treatment cartridge 100, the gasket 16 is advantageous from the viewpoint of sufficiently ensuring the watertightness of each contact portion.

A groove 17c is formed in the circumferential direction of the pad 16 on the flat surface 16d on the outside of the body portion 17a. That is, a groove 17c is formed on the outer side of the annular gasket 16 so as to extend in the circumferential direction of the gasket 16. With this, when high water pressure is applied to the pad 16 in the direction from the back to the front, the portion on the outer side of the pad 16 where the groove 17c is formed is easier to face from the back than when the groove is not formed Deformed by crushing in the direction of the front. The outer portion of the gasket 16 where the groove 17c is formed is in close contact with the inner surface of the side wall portion 40 of the shower cover 12.

By forming the groove 17c in the gasket 16, if the water treatment cartridge 100 is clogged, if the raw water passing through the gap between the inner wall surface of the head 20 and the outer surface of the water treatment cartridge 100 is subjected to high water pressure Then, as shown in FIG. 5, the outer body portion 17a of the pad 16 is deformed so as to be crushed in the direction from the back toward the front. Therefore, a gap is formed between the second flat surface 16 b of the pad 16 and the protrusion 31 of the first peripheral wall portion 30 in the head 20. Moreover, the raw water passes through the gap and wraps around the outside of the gasket 16, and passes through the gap between the sprinkler 42 and the side wall portion 40 in the shower cover 12 and leaks to the outside of the shower head 1. In this way, in the shower head 1, if the pad 16 is subjected to high water pressure, the pad 16 deforms and water leaks to the outside of the shower head 1, so the pressure inside the shower head 1 becomes too high, resulting in the shower head 1 Damage is suppressed.

In addition, in the shower head 1, a groove 17c is formed on the outer side of the gasket 16, whereby the gasket 16 is easily deformed. Therefore, the torque at the time of opening and closing the shower cover 12 becomes smaller compared to the case where the groove is not formed. Therefore, the opening and closing operation of the shower cover 12 can be easily performed.

In the present invention, when the mounting structure of the shower cover toward the head is a rotary type, it is preferable that the opening torque and closing torque are both 100 N · cm or less, and more preferably 80 N · cm or less. The bolt opening torque and the bolt closing torque can be adjusted by adjusting the length, width, and depth of the groove formed on the outer side of the pad.

In the present invention, the groove is preferably formed on the outer side of the pad over the entire circumference. As a result, the outer portion of the pad is easily deformed in the direction from the back to the front over the entire circumference. Therefore, when a high water pressure is applied, the pad is deformed and the effect of releasing the pressure becomes higher. In addition, as long as the range of the effect of the present invention is not impaired, the groove may not be formed over the entire circumference of the outer side of the gasket, for example, it may be formed intermittently in the circumferential direction of the gasket.

In this example, the cross-sectional shape of the groove formed on the outer side of the gasket is semicircular. In addition, the cross-sectional shape of the groove formed on the outer side of the spacer may be a shape other than a semicircle such as a rectangular shape or a triangular shape.

The depth and width of the groove formed on the outer side of the pad should be sufficient to ensure the watertightness of the adjoining portion between the second plane of the pad and the head, and the outer part of the pad will face the front from the back when subjected to high water pressure The method of deformation in the direction of the direction may be appropriately adjusted according to the thickness of the pad. In the present invention, when subjected to a water pressure of 0.75 MPa or more, it is preferable to adjust the depth and width of the groove so that the outer portion of the gasket is deformed so as to be crushed in the direction from the back toward the front. This makes it easy to coexist the water tightness of the adjoining portion between the second plane of the gasket and the head during normal use, and the effect of releasing internal pressure when the water treatment cartridge is clogged.

In addition, as long as the first plane, the second plane, and the third plane are formed, and the watertightness ranges can be ensured by these planes, respectively, and if grooves are formed on the outside, the cross-sectional shape of the gasket is not The shape limited to this example may be, for example, pentagonal or hexagonal.

The material of the pad is not particularly limited, and a material used for a known pad having elasticity can be used. Specific examples of the material of the pad include, for example, nitrile rubber, fluororubber, silicone rubber, ethylene propylene rubber, urethane rubber, or applying Teflon (registered trademark) to the material. Successors, etc. Among them, in terms of weather resistance, chemical resistance, and abrasion resistance, ethylene propylene rubber is preferred. In addition, from the viewpoint of heat resistance or oxidation resistance, those that have undergone peroxide vulcanization are more preferred. Furthermore, regarding the operability of the shower cover, the hardness of the pad is most preferably 70 degrees or less. As the material of the gasket, one kind may be used alone, or two or more kinds may be used in combination.

In the shower head 1, all the raw water flowing into the head 20 through the flow path 18a of the handle 18 flows into the water treatment filter cartridge 100 and is purified, and then the shower hole 42d from the sprinkler 42 is showered Sprinkle like water. In the present invention, it is preferable to store the water treatment filter cartridge in the shower head so that all raw water flowing into the shower head passes through the interior of the water treatment filter cartridge as in this example. By this, compared with the conventional shower head in which a bypass flow path that allows a part of the raw water to flow from the primary side to the secondary side is provided around the water treatment cartridge, the purification sprinkled from the sprinkler plate can be similarly reduced Residual chlorine concentration in water.

As explained above, in the shower head of the present invention, the first plane of the gasket is closely attached to the water treatment cartridge, the second plane is closely attached to the head, and the third plane is closely attached to the sprinkler, and each is closely attached Part of the primary side and secondary side are watertightly isolated. Therefore, as compared with a configuration in which O-rings are arranged at various locations to ensure watertightness, the number of members for ensuring watertightness is small, and watertightness can be easily and stably ensured.

In addition, in the shower head of the present invention, the plane formed on the inner side of the gasket is in close contact with the water treatment cartridge, and a groove is formed on the outer side of the gasket. Therefore, in normal use, the watertightness of the primary and secondary sides of the water treatment cartridge in the head is ensured, and the pad deforms when the water treatment cartridge is clogged, etc., and the internal pressure becomes excessive High and damage to the shower head is suppressed. In addition, a groove is formed on the outer side of the gasket, whereby the gasket is easily deformed, so the torque when opening and closing the shower cover is also small, and the shower cover can be easily opened and closed. The opening and closing of the shower cover is mainly performed when the water treatment cartridge is replaced, but even wet hands during the shower can be easily opened and closed. In addition, since the shower head of the present invention is sealed with a flat gasket, even if the water treatment cartridge is frequently replaced, the opening and closing of the shower cover is easy, and the sealed state is stably maintained. On the other hand, if the shower cover sealed with the O-ring is frequently opened and closed, the O-ring is easily twisted, and there is a risk that the sealability will be insufficient compared to the flat gasket of the present invention.

Furthermore, the shower head of the present invention is not limited to the shower head 1 described above. In the present invention, the cushion may not be installed inside the shower cover, for example, it may also be installed on the head of the shower head body. In addition, the shower head of the present invention may be a person equipped with a well-known water treatment cartridge. Regarding the shower head body and the shower cover, a well-known form may also be adopted, and the shower cover may also be screw-mounted on the head. [Example]

Hereinafter, the present invention will be described in detail by examples, but the present invention is not limited by the following description. [Example 1] The shower head 1 illustrated in FIGS. 2 and 4 was produced. In the pad 16, the width of the flat surface 16d outside the convex strip portion 17b is set to 2 mm, the distance from the flat surface 16d to the tip of the convex strip portion 17b is set to 5.7 mm, and the width of the groove 17c is set to 3 mm, set the depth to 2.5 mm. The groove 17c is formed on the outer side of the pad 16 over the entire circumference. As a material for forming the gasket 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 produced except that a gasket 17 having the same form as the gasket 16 was provided except that the groove 17c was not formed on the flat surface 16d.

[Measurement of bolt opening torque and bolt closing torque] For each shower head, a bolt opening torque meter (manufactured by SHIMPO, TNK series) was used to measure the bolt opening torque and bolt closing torque when opening and closing the shower cover. The measurement was performed 5 times each, and the average value was calculated. The results are shown in Table 1.

[Table 1]

As shown in Table 1, the shower head of Example 1 in which a groove is formed on the outside of the gasket has a smaller opening and closing torque than the shower head of Comparative Example 1 in which the groove is not formed, and the opening and closing of the shower cover is easy . [Industry availability]

It is possible to provide a shower head with a small number of components to ensure watertightness, which can easily and stably ensure watertightness. In addition, even when the water treatment cartridge is clogged, the internal pressure can be suppressed from becoming too high. Damaged.

1‧‧‧ shower head

10‧‧‧ shower head body

12‧‧‧ shower cover

16‧‧‧Padding

16a‧‧‧The first plane

16b‧‧‧2nd plane

16c‧‧‧3rd plane

16d‧‧‧plane

17a‧‧‧Body

17b‧‧‧Convex strip

17c‧‧‧Ditch

18‧‧‧grip

18a‧‧‧Stream

20‧‧‧Head

22‧‧‧Storage Department

24‧‧‧Support

28‧‧‧Front end

30‧‧‧ 1st wall

31‧‧‧Protrusion

32‧‧‧ 2nd wall part

34‧‧‧Convex strip

36‧‧‧Ditch

38‧‧‧O-ring

40‧‧‧Side wall part

42‧‧‧Sprinkler board

42a‧‧‧Circular Board Department

42b‧‧‧Cylinder

42c‧‧‧Flange

42d‧‧‧Sprinkler hole

44‧‧‧recess

100‧‧‧Water treatment cartridge

102‧‧‧ cartridge body

104‧‧‧ Purification material

110‧‧‧Department

112‧‧‧The first board

112a, 114a‧‧‧Inner wall

112b, 114b‧‧‧Outer wall

114‧‧‧ 2nd Board

115, 117‧‧‧recess

116, 118‧‧‧ opening

120, 121, 124, 125 ‧‧‧ protrusion

122, 126‧‧‧ filter

127, 128

FIG. 1 is a cross-sectional view showing an example of a shower head of the present invention. 2 is a cross-sectional view showing an example of the shower head of the present invention. Fig. 3 is an enlarged cross-sectional view of a pad portion in the shower head of Fig. 1. Fig. 4 is an enlarged cross-sectional view of a pad portion in the shower head of Fig. 2. 5 is a cross-sectional view showing how the pad of FIG. 4 is deformed by water pressure. 6 is a side view of the water treatment filter cartridge in the shower head of FIGS. 1 and 2.

Claims (8)

A shower head includes: a shower head body with a handle and a head provided at the front end of the handle; a shower cover installed on the front side of the head with a sprinkler plate; a water treatment filter cartridge, Housed in the head and filled with purification material; and a ring-shaped pad; the pad has a first plane formed over the entire circumference inside the pad, facing the head A second plane formed on the back side of the part over the entire circumference, and a third plane formed on the side facing the sprinkler plate over the entire circumference, the first plane being in close contact with the water treatment cartridge, The second plane is in close contact with the head, the third plane is in close contact with the sprinkler plate, and the primary side and secondary side of each closely-contacted portion are watertightly isolated. The shower head according to item 1 of the patent application, wherein the entire surface of the first plane is in close contact with the water treatment filter cartridge. The shower head according to item 1 of the patent application scope, wherein a groove is formed in the circumferential direction of the pad on the outer side of the pad. The shower head of claim 3, wherein the groove is formed over the entire circumference of the outside of the gasket. The shower head according to any one of claims 1 to 3, wherein the flat surface is formed in a part of the inner side of the pad. The shower head according to any one of items 1 to 3 of the patent application scope, wherein the installation structure of the shower cover toward the head is a plug-in type, and the opening and closing torques are 100N‧cm the following. The shower head according to any one of claims 1 to 3, wherein the shower cover is provided with a cylindrical side wall portion, and is provided so as to seal the front end opening of the front side of the side wall portion The sprinkler, the outer part of the liner on which the groove is formed is in close contact with the inner surface of the side wall part of the shower cover, and when subjected to water pressure of 0.75 MPa or more, the outer side of the liner Partly deformed in the direction from the back toward the front and creates a gap between the gasket and the side wall portion, the raw water passes through the gap, and passes through the sprinkler plate and the side wall of the shower cover The gap of the part leaks to the outside of the shower head. The shower head according to any one of claims 1 to 3, wherein the friction coefficient ratio of the grounding surface of the gasket contacting the inside of the shower cover and the water treatment cartridge The friction coefficient of the first plane in contact is large.