WO2017047340A1

WO2017047340A1 - Water faucet, spout head attached to water faucet, and water faucet assembly method

Info

Publication number: WO2017047340A1
Application number: PCT/JP2016/074605
Authority: WO
Inventors: 裕美粟田; 伸明板頭; 高志萩原; 直幸川久保; 広介安間; 佑一朗小松
Original assignee: 株式会社Ｌｉｘｉｌ
Priority date: 2015-09-15
Filing date: 2016-08-24
Publication date: 2017-03-23
Also published as: CN108026717A; EP3351695A4; US20180223509A1; EP3351695A1

Abstract

A water faucet is provided with a water faucet main body part 112, and a spout head 106 which is detachably attached to the water faucet main body part 112. The water faucet main body part 112 has a strut section 108 having a water passage section, and a coupling pipe 118 that protrudes in the radial direction of the strut section 108. The spout head 106 is attached to the water faucet main body part 112 in a state in which the coupling pipe 118 is housed.

Description

Faucet, water discharge head attached to faucet, and faucet assembly method

The present invention relates to a faucet, and more particularly to a connection structure and a detachable structure of a water discharge head in the faucet.

時には Although a faucet that does not have a water purification function was selected at the time of purchase, the user may later want the water purification function. Many commercially available water purifiers are additionally installed near the spout, but this type of water purifier is often shunned because it detracts from the beauty of the kitchen.

There is also a method of replacing a water discharge head (a tip portion of a faucet) having no water purification function with a water discharge head with a water purification function (see Patent Documents 1 and 2). However, the replacement of the water discharge head often requires a special tool, and therefore hesitates to replace it.

In addition, a faucet is known in which the faucet body and the water discharge head (tip portion of the water faucet) are configured as separate parts, and the water discharge head can be replaced (see Patent Document 1). For example, you may have selected a faucet that does not have a water purification function at the time of purchase, but later want to replace it with a water discharge head with a water purification function, or simply replace it with a newly designed water discharge head.

Also, a faucet that discharges water from a faucet at the tip of a tubular portion extending from the faucet body is known. On the other hand, there is a case where a faucet having no water purification function is selected at the time of purchase and a water purification function is added later. For example, Patent Document 3 describes a faucet directly connected water purifier attached to a faucet faucet having no water purification function.

Utility Model Registration No. 3127928 Japanese Utility Model Publication No. 6-14259 Japanese Patent Laid-Open No. 11-290839

In Patent Document 1, the replacement faucet fitting (water discharge head) is connected to the flexible hose of the faucet body using a dedicated connector. A certain amount of construction technology is required to replace the replacement faucet fitting.

Since Patent Document 2 is a type in which a water discharge pipe (water discharge head) is directly inserted into a cylindrical portion (a column serving as a rotating shaft) of a faucet body from above, it is easier to attach and detach than Patent Document 1. However, since the water discharge pipe rotates around the connection part, the joint part and the rotation part are common, and if a fine foreign substance enters the connection part, the water discharge pipe may be difficult to rotate. In particular, water that has fallen along the water discharge pipe is likely to accumulate in the joint portion, and water scale and foreign matter are likely to adhere to the joint portion.

The present invention has been made on the basis of the above-mentioned problem recognition, and its main purpose is a technique for connecting the water discharge head to the faucet body with a structure that can be easily attached and detached while maintaining the functionality as a faucet. , To provide.

In order to solve the above problems, a faucet according to an aspect of the present invention includes a faucet body and a water discharge head that is detachably attached to the faucet body. The faucet body has a strut having a water passage and a joint pipe protruding in the radial direction of the strut. The water discharge head is attached to the faucet body in a state in which the joint pipe is accommodated.

Another aspect of the present invention is a water discharge head. The water discharge head is a water discharge head that is detachably attached to the faucet body, and is connected to the faucet body so as to accommodate a joint pipe protruding from the faucet body.

Still another aspect of the present invention is a faucet assembly method. In this method, a water discharge head is provided for a faucet main body having a strut having a water passage portion and a rotating portion having a joint pipe rotatably attached to the strut and projecting in a radial direction. The step of inserting the joint pipe into the water discharge head so that the end portion faces the outer peripheral surface of the rotating portion, and the fastener is inserted from the insertion port extending in the circumferential direction in the outer shell of the water discharge head, and the joint is connected by the fastener. Gripping the tube.

According to the present invention, it is possible to provide a faucet technology that can easily maintain functionality as a faucet and that can easily attach and detach a water discharge head.

It is a side view of the water tap in a 1st embodiment. It is a disassembled perspective view of a water faucet. It is an external view of the lower part of a water discharge head. It is a disassembled perspective view of a water discharging head. It is an expansion perspective view of the periphery of a buffer member. It is a schematic diagram of the junction structure in a 1st embodiment. It is a schematic diagram of the junction structure in the 1st comparative example. It is sectional drawing of the water discharging head without a water purification function. It is sectional drawing of the faucet which attached the water discharging head to the faucet main-body part. It is sectional drawing of the water discharging head which has a water purification function. It is sectional drawing of the faucet which attached the water discharging head to the faucet main-body part. It is a side view of a faucet. It is a disassembled perspective view of a water faucet. It is a disassembled perspective view of the water discharging head in 2nd Embodiment. It is a schematic diagram of the junction structure in 2nd Embodiment. It is a schematic diagram of the junction structure in the 2nd comparative example. It is a schematic diagram of the junction structure in the 3rd comparative example. It is a side view of a joint pipe. It is a schematic diagram which shows the joining structure of a water discharging head and a coupling pipe. It is sectional drawing of the water discharging head without a water purification function. It is sectional drawing of the faucet which attached the water discharging head to the faucet main-body part. It is sectional drawing of the water discharging head which has a water purification function. It is sectional drawing of the faucet which attached the water discharging head to the faucet main-body part. It is a disassembled perspective view of the water discharging head in 3rd Embodiment. It is sectional drawing of the water discharging head in 3rd Embodiment. It is sectional drawing of the faucet which attached the water discharging head to the faucet main-body part in 3rd Embodiment. It is an expansion perspective view of the periphery of a buffer member. It is a side view of the faucet concerning a 4th embodiment. It is a disassembled perspective view of the faucet concerning a 4th embodiment. It is a disassembled perspective view of the water discharge head of the faucet concerning a 4th embodiment. It is a side view of the periphery of the protrusion pipe part of the faucet concerning a 4th embodiment. It is explanatory drawing explaining the periphery of the urging mechanism of the faucet which concerns on 4th Embodiment. It is explanatory drawing explaining the elastic body of the faucet which concerns on 4th Embodiment. It is explanatory drawing explaining the sliding member of the faucet which concerns on 4th Embodiment. It is explanatory drawing explaining the fastener of the faucet which concerns on 4th Embodiment. It is sectional drawing of the water discharging head of the faucet concerning a 4th embodiment. It is sectional drawing of another water discharging head which has a water purification function. It is sectional drawing of the water tap of the state which mounted | wore with another water discharging head of FIG. It is a front view of the faucet concerning a 4th embodiment. It is a schematic diagram which shows operation | movement of the non-return valve of the faucet which concerns on 4th Embodiment. It is a side view of the faucet concerning a 5th embodiment. It is a fragmentary sectional view along the AA line of the faucet concerning a 5th embodiment. It is a perspective view of the buffer member of the faucet concerning a 5th embodiment. It is a schematic diagram of the buffer member of the faucet according to the fifth embodiment.

The present inventor obtained the following recognition regarding the technology of the conventional faucet.

1. In the case of a faucet in which the water discharge head can be replaced, if the joint between the water discharge head and the water faucet body is conspicuous, the overall aesthetics may be impaired. In particular, when the mounting portion of the faucet body and the outer diameter size of the water discharge head are different, the joint portion becomes unnatural, which may cause hesitation to be exchanged.

In Patent Document 1, the replacement faucet fitting 1 (water discharge head) is connected to the flexible hose of the faucet body using a dedicated connector. Since the replacement faucet fitting 1 is fitted into the connecting tube 6 protruding from the faucet body, the joint portion is easily noticeable. If a water discharge head that can be easily replaced at home is assumed, the joint portion may be more noticeable. Further, in Patent Document 1, since it is premised that the connecting pipe 6 and the replacement faucet fitting 1 have the same outer diameter, the shape of the replacement faucet fitting 1 is limited to the shape of the connecting pipe 6.

For this reason, it is desirable to provide a structure in which the spout head is connectable to the faucet body with a structure that can be easily attached and detached, and in particular the joint portion is not conspicuous.

2. As described above, in the case of a faucet in which the water discharge head can be replaced, if the joint between the water discharge head and the water faucet body is conspicuous, the overall aesthetics may be impaired.

In Patent Document 1, the replacement faucet fitting 1 (water discharge head) is connected to the flexible hose of the faucet body using a dedicated connector. In patent document 1, when the joint part of the connection pipe | tube 6 which protrudes from a faucet body and the faucet | fitting 1 for replacement | exchange is conspicuous, and assuming the water discharge head which can be replaced | exchanged easily at home, a joint part may become more conspicuous. There is.

For this reason, it is more desirable to provide a structure in which the spout head is connectable to the faucet body with a structure that can be easily attached and detached, and in particular, the joint portion is not noticeable.

3. As described above, in Patent Document 1, the replacement faucet fitting 1 (water discharge head) is connected to the flexible hose of the faucet body using a dedicated connector. Assuming portability, the replacement faucet fitting 1 is required to be strong enough not to break when dropped or hit.

Similarly, it is desirable that the replacement faucet fitting 1 is lightweight, and it is necessary to have a strength sufficient to withstand the load applied to the joint portion with the faucet body. However, in Patent Document 1, no special consideration is given to the strength of the portable water faucet 1 for replacement.

For this reason, it is desirable to provide a structure for strengthening a water discharge head that can be easily attached to and detached from the faucet body.

4). The water purifier described in Patent Document 3 is a so-called retrofitted water purifier, in which a fastening cap for attaching the upper part of the water purifier main body is fitted to the tip of the faucet faucet and screwed to the upper part of the water purifier main body. It is configured to be attached by joining.

However, as in the case of the water purifier described in Patent Document 3, if a retrofitted water purifier is attached to the tip of the faucet faucet, it is not preferable from the viewpoint of design due to an increased discomfort in appearance. In addition, when the water purifier is attached in this way, the water purifier protrudes below the faucet faucet, so the space between the water purifier spout and the sink becomes narrow, and it is conceivable that the usability is reduced accordingly.

In order to alleviate the uncomfortable appearance, it is possible to replace the entire faucet with a faucet incorporating a water purification cartridge. However, in order to replace the faucet as a whole, special techniques for exchanging faucets and special tools for exchanging the faucet are used. There is a problem that costs.
As described above, the conventional faucet has room for improvement from the viewpoint of facilitating the operation of exchanging the faucet having no water purifying function with the faucet having the water purifying function and suppressing the replacement cost.

For this reason, it is desired to provide a faucet technology that facilitates the work of replacing a faucet having no water purifying function with a faucet having a water purifying function, and can keep the replacement cost low.

This completes the description of the inventors' recognition. The contents of the present invention will be specifically described below based on some embodiments.

[First Embodiment]
FIG. 1 is a side view of a faucet 100 according to the first embodiment. FIG. 2 is an exploded perspective view of the water tap 100.
The faucet 100 in the first embodiment includes a faucet body 112 and a water discharge head 106. The water discharge head 106 and the faucet body 112 are connected with a structure that can be attached and detached by a general user. The water discharge head 106 shown in FIG. 1 is a type that does not have a water purification function.

The faucet body 112 includes a water discharge handle 102, a rotating unit 104, a support column 108, and a support cap 114. The column 108 is fixed to a kitchen or the like and incorporates a water conduit 110 (see FIG. 2). The rotating unit 104 is installed so as to cover the column unit 108. The rotating unit 104 rotates in the horizontal direction around the column unit 108. The support cap 114 on the rotating unit 104 is connected to the support unit 108. By the support cap 114, the rotating unit 104 is positioned so as not to come out vertically. When the user moves the water discharge handle 102 on the column cap 114 in the vertical direction, the water discharge handle 102 moves the operation protrusion 116 of the column unit 108 back and forth, thereby opening and closing a valve (not shown) built in the column unit 108. Is done.

The joint pipe 118 protrudes from the rotating part 104 in the radial direction, preferably obliquely upward. The joint pipe 118 is connected to the water pipe 110 through the water outlet 124. The water discharge head 106 is fixed to the rotating unit 104 in a state where the joint pipe 118 is accommodated. As shown in FIG. 1, the end of the water discharge head 106 abuts on the side surface (outer peripheral surface) of the rotating unit 104. That is, the strut portion 108 and the rotating portion 104 come into contact with each other at a location where the joint pipe 118 branches from the rotating portion 104, at the root of the joint pipe 118. In the first embodiment, “contact” includes not only contact between two members but also contact through an intermediate material (such as a buffer material).

An insertion port 122 extending in the circumferential direction is formed at the bottom of the water discharge head 106. After the joint pipe 118 is inserted into the water discharge head 106 and the water discharge head 106 is brought into contact with the rotating portion 104, the user inserts the fastener 120 from the insertion port 122 (see FIG. 3). The fastener 120 in the first embodiment is formed of a clip-type member (resin or the like) having a certain strength and elasticity. When the water discharge head 106 is installed in the faucet main body 112, the joint pipe 118 is accommodated in the water discharge head 106, and the water discharge head 106 is pushed in until it contacts the rotating portion 104. Next, the fastener 120 is pushed in from the insertion port 122 by hand. The water discharge head 106 is fixed to the rotating unit 104 by the fastener 120 gripping (holding) the joint pipe 118 like a clip. Since the fastener 120 fits snugly into the insertion port 122, the movement of the water discharge head 106 in the front-rear direction X and the radial direction Y is regulated by the fastener 120 that firmly holds the joint pipe 118 (see FIG. 3).

When removing the water discharge head 106 from the faucet body 112, the fastener 120 viewed from the insertion port 122 may be pulled out with a tool such as a flat-blade screwdriver. After removing the fastener 120, the water discharge head 106 can be easily removed from the faucet body 112 by pulling the water discharge head 106 by hand.

FIG. 4 is an exploded perspective view of the water discharge head 106.
The water discharge head 106 includes an outer shell 126, an inner pipe 128, a water discharge port member 130, a rectifying member 132, and a buffer member 134. The inner pipe 128 accommodates the joint pipe 118. The tap water reaches the water outlet member 130 from the water pipe 110 through the joint pipe 118 and the inner pipe 128, and is discharged into the sink (not shown) through the rectifying member 132. A valve connected to the water conduit 110 and built in the support column 108 is opened and closed by the water discharge handle 102 and the operation projection 116.

The inner tube 128 is covered with an outer shell 126 (outer tube). That is, the water discharge head 106 has a double structure of the inner tube 128 and the outer shell 126. The buffer member 134 is a rubber spacer connected to the end portion of the inner tube 128, and comes into contact with the rotating portion 104 when the water discharge head 106 is connected. In the first embodiment, the outer shell 126 of the water discharge head 106 does not come into direct contact with the faucet body 112, but comes into contact with the faucet body 112 through the buffer member 134.

The rotating shaft of the rotating unit 104 is the support column 108, and the water discharge head 106 is connected to the joint pipe 118 branched from the rotating unit 104 instead of the support column 108. For this reason, even if the rotating part 104 rotates frequently, it does not directly affect the connection strength between the water discharge head 106 and the faucet body part 112. Similarly, the attachment / detachment of the water discharge head 106 does not directly affect the rotation of the rotating unit 104.

Since the joint pipe 118 has a connection structure that is extended by the water discharge head 106, when the water discharge head 106 is rotated in the horizontal direction, the rotational force is transmitted to the joint pipe 118 as it is, so that the rotation operation by the user is performed by the rotation of the rotary unit 104. Easy to convey as power.

FIG. 5 is an enlarged perspective view of the periphery of the buffer member 134.
The buffer member 134 covers the end surface of the outer shell 126 on the faucet body 112 side. The buffer member 134 may be a member having a higher elastic modulus than the outer shell 126. The buffer member 134 in the first embodiment is made of rubber. Further, the contact width T of the contact surface 136 of the buffer member 134 is at least larger than the thickness of the outer shell 126. Although the side surface of the rotating part 104 in the first embodiment has a curved surface shape (cylindrical shape), the contact surface 136 of the buffer member 134 is also processed to a shape that matches the curved surface shape of the rotating part 104. For this reason, the water discharge head 106 and the rotation part 104 can be connected with a smooth appearance without a gap.

Furthermore, since the water discharge head 106 and the rotating part 104 are connected via the elastic buffer member 134, the water discharge head 106 and the faucet body 112 can be brought into close contact with each other without any gap. Further, since the contact surface 136 is enlarged by increasing the contact width T, the pressure accompanying the connection is easily dispersed, and the rotating portion 104 is hardly damaged by the connection of the water discharge head 106.

If the buffer member 134 is not installed, the outer shell 126 comes into direct contact with the rotating unit 104. In this case as well, the contact surface of the outer shell 126 may be enlarged, for example, the outer shell 126 may be thickened on the contact surface to reduce the pressure associated with the connection. It should be noted that the outer shell 126 and the rotating unit 104 may be opposed to each other after providing a conspicuous gap between the outer shell 126 and the rotating unit 104, for example, a clearance of about 0.1 to 0.6 mm. .

FIG. 6 is a schematic diagram of the bonding structure in the first embodiment.
In this embodiment, a joint pipe 118 is provided as a part of the rotating unit 104, and the water discharge head 106 accommodates the joint pipe 118 to connect the water discharge head 106 and the faucet body 112. A boundary surface 105 between the water discharge head 106 and the rotating unit 104 is formed at the base of the joint pipe 118.

FIG. 7 is a schematic diagram of the bonding structure in the first comparative example.
FIG. 7 is a comparative example showing a type in which the joint pipe 142 is provided in the water discharge head 140 instead of the rotating part 138. A branching portion 146 is formed obliquely upward on the side surface of the rotating portion 138. By housing the joint pipe 142 as a part of the water discharge head 140 in the branch portion 146, the water discharge head 140 and the rotating portion 138 are connected. A boundary surface 144 between the water discharge head 140 and the branch portion 146 is formed at the tip of the branch portion 146.

In the case of the first embodiment, since the connection pipe 118 is covered with the water discharge head 106, there is no substantial restriction on the inner and outer diameters of the water discharge head 106. The inner pipe 128 of the water discharge head 106 needs to have an inner diameter that matches the outer diameter of the joint pipe 118, but the inner and outer diameters of the outer shell 126 that houses the inner pipe 128 can be designed relatively freely. On the other hand, in the case of the first comparative example, a step is formed on the boundary surface 144 unless the outer diameter of the water discharge head 140 is matched with the outer diameter of the branch portion 146. For this reason, the outer diameter of the water discharge head 140 is regulated by the outer diameter of the branch portion 146.

Further, when the joint pipe 118 is accommodated by the water discharge head 106, the surface of the rotating portion 104 can be made the boundary surface 105, so that there is an advantage that the boundary surface 105 is not conspicuous compared to the first comparative example. In the case of the connection structure as in the first comparative example, since the boundary surface 144 is conspicuous, the user may be mistaken for a faucet that can pull out the hose by pulling the water discharge head 140.

In the case of the first comparative example, if a gap is formed on the boundary surface 144, foreign matters such as dust are likely to enter the branch portion 146. On the other hand, even if a foreign substance enters the boundary surface 105 of the first embodiment, there is almost no possibility that the foreign substance enters the joint pipe 118 or the water discharge head 106. This is because the water discharge head 106 extends obliquely upward.

Furthermore, the joint pipe 142 in the first comparative example is a protrusion of the water discharge head 140. For this reason, there is a risk that the water faucet body portion may be damaged when the protruding portion (joint pipe 142) of the water discharge head 140 unexpectedly contacts the side surface of the rotating portion 138 or the like.

In the case of the first embodiment, even if there is some variation in the length of the joint pipe 118, it is easy to absorb the length variation by adjusting the insertion depth of the joint pipe 118 into the water discharge head 106. On the other hand, in the case of the first comparative example, the length of the joint pipe 142 is easily restricted by the length of the branch portion 146.

In the first embodiment, the inner tube 128 of the water discharge head 106 is involved in the connection with the rotating unit 104, but the outer shell 126 is not directly involved. Therefore, since the connection load is not easily applied to the outer shell 126, the material of the outer shell 126 can be selected relatively freely. For example, the outer shell 126 may be made of metal such as brass or stainless steel, but may be formed of a resin material such as ABS resin or polyacetal and may be plated. If the weight of the outer shell 126 can be reduced, the replaceable water discharge head 106 can be easily carried and safer.

FIG. 8 is a cross-sectional view of the water discharge head 106 having no water purification function. FIG. 9 is a cross-sectional view of the faucet 100 a in which the water discharge head 106 is attached to the faucet body 112.
As described above, the water discharge head 106 has a double structure of the inner tube 128 and the outer shell 126, and the inner tube 128 is connected to the water discharge port member 130 with the O-ring 154 interposed therebetween. The outlet of the water outlet member 130 is capped by the rectifying member 132. The rectifying member 132 rectifies the flowing water from the inner pipe 128 and converts it into foam water. The end portion of the water discharge head 106 and the contact surface 136 of the buffer member 134 connected thereto are formed as curved surfaces matching the outer peripheral shape of the rotating portion 104 (see FIG. 8). In other words, the shape of the contact surface of the water discharge head 106 and the curved surface shape of the rotating unit 104 are the same. The term “coincidence” as used herein refers to the shape of the contact surface of the water discharge head 106 so that a large gap, for example, a gap of 1.0 mm or more does not occur in the facing portion (joint portion) between the water discharge head 106 and the rotating portion 104. Is approximated to the curved surface shape of the rotating unit 104.

A cylindrical member 172 is screwed into the joint pipe 118, and the O-ring 152 stops water between the inner pipe 128 and the cylindrical member 172. Water is stopped by another O-ring 155 between the water passage 124 and the tubular member 172. The joint pipe 118 is inserted into the inner pipe 128, and the water discharge head 106 abuts on the rotating unit 104 via the buffer member 134. Another O-ring 150 is also inserted between the joint pipe 118 and the inner pipe 128 to prevent rattling. After the joint pipe 118 is inserted into the inner pipe 128, the catch 120 holds the joint pipe 118, so that the water discharge head 106 is firmly fixed to the joint pipe 118.

FIG. 10 is a cross-sectional view of a water discharge head 148 having a water purification function. FIG. 11 is a cross-sectional view of the faucet 100 b in which the water discharge head 148 is attached to the faucet body 112.
The water discharge head 148 having a water purification function also has a double structure of an inner tube 170 and an outer shell 164, and a water discharge member 160 is attached to the tip. A water purification handle 162 provided on the water discharge member 160 is an operation member for switching between raw water and purified water. The end portion of the water discharge head 148 and the contact surface 136 of the buffer member 134 fitted thereto are also formed as curved surfaces matching the outer peripheral shape of the rotating portion 104 (see FIG. 10).

The inner pipe 170 is fitted with the cartridge holding part 156, and the joint pipe 118 is inserted into the inner pipe 170. An O-ring 166 is inserted between the inner tube 170 and the cartridge holding part 156. The cartridge holding unit 156 also has a built-in water purification cartridge 158, and the water purification cartridge 158 can be replaced if the water discharge member 160 is removed. Inside the cartridge holding part 156 is a valve 168. When the water purification cartridge 158 is set, the water purification cartridge 158 pushes out the valve 168, and the inner pipe 170 and the cartridge holder 156 (water purification cartridge 158) communicate with each other. On the other hand, when the water purification cartridge 158 is removed, the valve 168 is closed by the water pressure in the inner pipe 170. The valve 168 is a safety device for preventing the water in the inner pipe 170 from being sprayed from the tip of the water discharge head 148 as it is when the water purification cartridge 158 is removed while the water is passing.

In the above, based on 1st Embodiment, it demonstrated centering on the structure of the faucet 100, especially the connection structure of the water discharge heads 106 and 148 and the faucet main-body part 112. FIG.
According to the first embodiment, the water discharge heads 106 and 148 can be attached to and detached from the faucet body 112 by a simple operation. Further, the sizes of the

outer shells

126 and 164 of the water discharge heads 106 and 148 can be set relatively freely. Since the boundary surface 105 between the water discharge heads 106 and 148 and the faucet main body 112 is not conspicuous, a clean design can be maintained while being replaceable. Further, since the boundary surface 105 is not a rotating portion, the rotational motion and the connection operation do not affect each other.

The present invention has been described based on the first embodiment. This embodiment is an exemplification, and it is understood by those skilled in the art that various modifications and changes are possible within the scope of the claims of the present invention, and that such modifications and changes are also within the scope of the claims of the present invention. It is where it is done. Accordingly, the description and drawings herein are to be regarded as illustrative rather than restrictive.

In the first embodiment, the description has been made assuming the replacement of the water discharge head 106 having no water purification function and the water discharge head 148 having a water purification function, but the present invention is not limited to this. For example, a water discharge head that does not have a shower function and a water discharge head that has a shower function may be exchanged, or a water discharge head having a different length according to the size of a user's body (for example, an adult and a child) is prepared. Also good. Also, if you change your mood by changing the wristband of your wristwatch, you can easily change the atmosphere of the kitchen by replacing the spout head with a different design even if it has no difference in function.

The buffer member 134 does not need to be connected to the inner tube 128 and may be connected to the outer shell 126. The buffer member 134 does not need to be an independent part, and may be integrally formed as a part of the inner tube 128 or the outer shell 126.

The following invention is recognized from the above description.
The faucet in an aspect of the present invention includes a faucet body and a water discharge head that is detachably attached to the faucet body.
The faucet body has a strut having a water passage and a rotating part having a joint pipe rotatably attached to the strut and protruding in the radial direction.
The water discharge head is attached to the faucet body in a state in which the joint pipe is accommodated.

Since the water discharge head is connected to a joint pipe protruding in the radial direction as a part of the rotating part, it becomes easy to transmit the rotational force of the water discharging head as it is as the rotational force of the rotating part.

When the water discharge head is attached to the faucet body, the end of the water discharge head may come into contact with the outer peripheral surface of the rotating portion.
Since the branch point of the joint pipe from the rotating part can be used as a connection surface between the water discharge head and the faucet body, the connection part is not conspicuous, and the design of the faucet as a whole can be easily cleaned.

The outer peripheral surface of the rotating part may have a curved surface shape. And the shape of the surface facing the rotating part of the water discharge head may coincide with the curved surface shape of the rotating part.
Even when the outer peripheral surface of the rotating portion has a curved surface shape, the connecting portion between the water discharge head and the faucet main body portion is further reduced by processing the opposite surface of the water discharge head into the same shape.

The end of the water discharge head may be covered with a buffer member. The water discharge head may come into contact with the rotating part via the buffer member.
Since the end of the water discharge head is covered with the buffer member, it becomes easy to prevent the end of the water discharge head from contacting the surface of the rotation unit and damaging the rotation unit. Furthermore, if the buffer member is made of a softer material having a higher elastic modulus than the outer shell of the water discharge head, the adhesion between the water discharge head and the faucet body can be easily improved.

The water discharge head may have a structure in which an inner tube forming a water passage is inserted into the outer shell. The inner pipe may accommodate the joint pipe.
Since the outer shell does not directly participate in the connection between the water discharge head and the joint pipe, the outer shell is hardly damaged. In addition, it becomes easier to increase the degree of freedom in designing the outer shell.

A water discharge head according to an aspect of the present invention is provided in a faucet body having a column having a water passage and a rotary having a joint pipe rotatably attached to the column and projecting in a radial direction. Connected. The end of the water discharge head accommodates the joint pipe until it comes into contact with the outer peripheral surface of the rotating part, and the faucet body is gripped by a fastener inserted from an insertion port extending in the circumferential direction in the outer shell. Fixed to the part.

Since the water discharge head can be attached / detached by inserting / removing the fitting tube into / from the water discharge head, the water discharge head of the faucet body can be easily replaced. Moreover, the connection force of both can be easily strengthened by inserting a fastener from the outlet of the water discharge head and gripping the joint pipe.

A water discharge head according to another aspect of the present invention includes a water faucet body portion having a column portion having a water passage portion and a rotation portion rotatably attached to the column portion and having a joint pipe projecting in the radial direction. Connected to. The water discharge head has a structure in which an inner pipe that forms a water passage is inserted into the outer shell, and the inner pipe accommodates the joint pipe, thereby being connected to the faucet body.

Since the outer shell is not directly involved in the connection between the water discharge head and the joint pipe, the outer shell is less likely to be damaged. In addition, it becomes easier to increase the degree of freedom in designing the outer shell.

The end of the water discharge head facing the rotating part may be covered with a cushioning material.

A faucet assembling method according to an aspect of the present invention is a faucet body having a strut portion having a water passage portion and a rotating portion rotatably attached to the strut portion and having a joint pipe projecting in the radial direction. A step of inserting the joint pipe into the water discharge head so that the end of the water discharge head faces the outer peripheral surface of the rotating part with respect to the part, and a fastener from the insertion port extending in the circumferential direction in the outer shell of the water discharge head And holding the joint pipe with the fastener.

[Second Embodiment]
FIG. 12 is a side view of the faucet 200 according to the second embodiment of the present invention. FIG. 13 is an exploded perspective view of the faucet 200.
The faucet 200 according to the second embodiment includes a faucet body 212 and a water discharge head 206. The water discharge head 206 and the faucet body 212 are connected with a detachable structure that can be replaced by a general user. The water discharge head 206 shown in FIG. 12 is a type which does not have a water purification function.

The faucet body 212 includes a water discharge handle 202, a rotating part 204, a support column 208 and a support cap 214. The support | pillar part 208 is fixed to a kitchen etc. and incorporates the water flow pipe 210 (refer FIG. 13). The rotating unit 204 is installed so as to cover the column unit 208. The rotating unit 204 rotates in the horizontal direction around the column unit 208. The support cap 214 on the rotating unit 204 is connected to the support unit 208. By the support cap 214, the rotating unit 204 is positioned so as not to come out vertically. When the user moves the water discharge handle 202 on the column cap 214 in the vertical direction, the water discharge handle 202 moves the operation protrusion 216 of the column portion 208 back and forth, thereby opening and closing a valve (not shown) built in the column portion 208. Is done.

The joint pipe 218 protrudes from the rotating part 204 in the radial direction, preferably obliquely upward. The joint pipe 218 is connected to the water pipe 210 via the water inlet 224. A tubular member 272 is further inserted into the joint pipe 218. The water discharge head 206 is fixed to the rotating unit 204 in a detachable structure in a state where the joint pipe 218 and the cylindrical member 272 are accommodated. As shown in FIG. 12, the end of the water discharge head 206 faces the side surface (outer peripheral surface) of the rotating unit 204. That is, the water discharge head 206 and the rotating part 204 (water faucet main body part 212) face each other at the location where the joint pipe 218 branches from the rotating part 204, at the root of the joint pipe 218.

The water discharge head 206 is pushed down to the root portion of the joint pipe 218 when mounted. The water discharge head 206 is preferably in contact with the outer surface of the rotating unit 204, but is close to the outer surface of the rotating unit 204 at least to the extent that the joint between the rotating unit 204 and the water discharging head 206 is not noticeable. More specifically, “pushing to the root portion” means that the water discharge head 206 accommodates 90% or more of the total length of the joint pipe 218, or a gap between the end of the water discharge head 206 and the outer surface of the rotating portion 204. Is within 1.5 millimeters.

An insertion port 222 extending in the circumferential direction is formed below the water discharge head 206. After inserting the joint pipe 218 into the water discharge head 206, the user inserts the fastener 220 from the insertion port 222. The fastener 220 is formed of a clip-type member (resin or the like) having a certain strength and elasticity. When the water discharge head 206 is attached to the faucet main body 212, the joint pipe 218 is accommodated in the water discharge head 206, and the water discharge head 206 is pushed toward the rotating unit 204. Next, the fastener 220 is pushed in from the insertion port 222 by hand. The water discharge head 206 is fixed to the rotating unit 204 by the fastener 220 gripping (clamping) the joint pipe 218 like a clip. If the fastener 220 is removed, the water discharge head 206 can be easily removed from the faucet body 212 by pulling the water discharge head 206 by hand.

Note that “detachable” in the second embodiment does not include a structure that completely fixes the water discharge head 206 and the faucet main body 212 by bonding or welding. It means a structure that a general user can attach and detach at home, and a structure that does not require a dedicated tool for attaching and detaching such as a screwdriver is preferable. In the second embodiment, the water discharge head 206 and the faucet body 212 are fixed by the fastener 220, but the fastener 220 can be inserted and removed with a finger or a nail without using a tool. Moreover, although the fasteners 220 may be hooked and removed using an arbitrary metal bar or the like, a dedicated tool for attaching and detaching is not essential. Of course, the structure which does not use additional fixing members, such as the fastener 220, may be sufficient.

An outer diameter enlarged portion 274 is formed at the root portion of the joint pipe 218. The outer diameter enlarged portion 274 in this embodiment has a tapered shape, and has an outer diameter larger than the outer diameter of the central portion of the joint pipe 218. Although the outer diameter enlarged portion 274 in the second embodiment has a tapered shape, it is not essential to be tapered, and at least a portion having an outer diameter larger than the outer diameter of the central portion of the joint pipe 218. Good. The user usually rotates the rotating unit 204 by operating the water discharge head 206. At this time, the load accompanying the rotation concentrates on the root portion of the joint pipe 218. In the second embodiment, the connection strength between the joint pipe 218 and the rotating part 204 is improved by forming the outer diameter enlarged portion 274 at the root portion of the joint pipe 218.

The water discharge head 206 is attached by being pushed toward the rotating portion 204 until at least all or a part of the outer diameter enlarged portion 274 is accommodated. The water discharge head 206 may have its end abutted against the outer surface of the rotating portion 204 to completely accommodate the outer diameter enlarged portion 274.

FIG. 14 is an exploded perspective view of the water discharge head 206 according to the second embodiment.
The water discharge head 206 according to the second embodiment includes an outer shell 226, an inner tube 228, a water discharge port member 230, and a rectifying member 232. The inner pipe 228 accommodates the joint pipe 218 and the cylindrical member 272 fixed to the joint pipe 218. The tap water reaches the water outlet member 230 from the water flow pipe 210 through the cylindrical member 272 and the inner pipe 228 in the joint pipe 218, and is discharged to the sink (not shown) through the rectifying member 232. The valve connected to the water flow pipe 210 and built in the column 208 is opened and closed by the water discharge handle 202 and the operation protrusion 216.

The inner tube 228 is covered with an outer shell 226 (outer tube). That is, the water discharge head 206 has a double structure of the inner tube 228 and the outer shell 226. The rotating shaft of the rotating unit 204 is the support column 208, and the water discharge head 206 is connected to the joint pipe 218 branched from the rotating unit 204 instead of the supporting column 208.

Since the joint pipe 218 has a structure extended by the water discharge head 206, when the water discharge head 206 is rotated in the horizontal direction, the rotational force is transmitted to the joint pipe 218 as it is. Easy to convey as. Since the joint pipe 218 is accommodated in the water discharge head 206, the joint pipe 218 does not constitute an appearance.

The water discharge head 206 has a double structure of the inner tube 228 and the outer shell 226, thereby improving the strength of the water discharge head 206 as a whole. The inner tube 228 extends from the water outlet member 230 to the end of the outer shell 226 (a portion facing the rotating portion 204) so as to cover almost the entire area of the outer shell 226. Here, the “end of the outer shell 226” refers to a range within 3 millimeters from the tip 276 of the outer shell 226. For this reason, the end of the inner tube 228 and the end of the outer shell 226 are substantially coincident. When the inner pipe 228 as well as the outer shell 226 is attached to the faucet body 212, it is pushed in until at least all or a part of the outer diameter enlarged portion 274 is accommodated. Alternatively, the inner tube 228 may have a shape in which a part thereof protrudes from the end of the outer shell 226.

The roles of the inner tube 228 and the outer shell 226 are different. The outer shell 226 emphasizes aesthetics, but the aesthetics of the inner tube 228 built in the outer shell 226 is not so important. On the other hand, since the inner pipe 228 is a water passage and is directly joined to the joint pipe 218, a high machining accuracy is particularly required for the inner structure.

In order to reduce weight and cost, both the outer shell 226 and the inner tube 228 are formed of a resin such as ABS resin or polyacetal. If the weight of the outer shell 226 can be reduced, the replaceable water discharge head 206 can be easily carried and safe. Since the strength of the resin is lower than that of the metal, the water discharge head 206 is reinforced by the double structure of the inner tube 228 and the outer shell 226. In addition, the outer shell 226 is subjected to resin plating in order to have a metallic luster. In resin plating, the outer shell 226 is immersed in the plating solution with the vicinity of the tip 276 supported from the inside. Since the plating solution is hot, stress is likely to be applied to the support portion (inner side) of the outer shell 226. This stress may reduce the processing accuracy of the internal structure of the outer shell 226. On the other hand, since the inner tube 228 does not need to be plated with resin, it is free from such stress. For this reason, the inner tube 228 that requires relatively high processing accuracy is configured separately from the outer shell 226, so that the aesthetics of the outer shell 226 and the functionality of the inner tube 228 are compatible.

The outer surface of the rotating part 204 has a curved surface shape (cylindrical shape), but the end surfaces of the outer shell 226 and the inner tube 228 are also processed to a shape that matches the curved surface shape of the rotating part 204. Further, as will be described in detail later, the end surfaces of the outer shell 226 and the inner tube 228 are processed into a shape that matches the tapered surface of the outer diameter enlarged portion 274. That is, the end surfaces of the outer shell 226 and the inner tube 228 form a shape that matches the outer surface of the outer diameter enlarged portion 274 and the rotating portion 204. For this reason, the water discharge head 206 and the rotation part 204 can be connected with a smooth appearance without a gap.

FIG. 15 is a schematic diagram of a bonding structure according to the second embodiment.
Since it is a schematic diagram for explaining the characteristics of the joining structure, detailed structures such as the cylindrical member 272 and the outer diameter enlarged portion 274 are omitted in FIGS. In the second embodiment, a joint pipe 218 is provided as a part of the rotating unit 204 and accommodated in the water discharge head 206 to connect the water discharge head 206 and the faucet body 212. A boundary surface 205 (joining portion) between the water discharge head 206 and the rotating unit 204 is formed at the base of the joint pipe 218.

16 and 17 are schematic views of the joint structure in the second and third comparative examples.
FIG. 16 is a second comparative example showing a type in which the joint pipe 242 is provided in the water discharge head 240 instead of the rotating part 238. A branch portion 246 is formed obliquely upward on the side surface of the rotating portion 238. The joint pipe 242 as a part of the water discharge head 240 is inserted into the branch portion 246 to connect the water discharge head 240 and the rotating portion 238. A boundary surface 244 (joint portion) between the water discharge head 240 and the branch portion 246 is formed at the tip of the branch portion 246. In the third comparative example shown in FIG. 17, a joint pipe 218 is provided at the branch portion 247. Although the point which accommodates the joint pipe 218 in the water discharge head 241 is the same as that of 2nd Embodiment, the boundary surface 244 is formed in the front-end | tip 276 of the branch part 246 similarly to FIG.

15, since the water discharge head 206 covers the joint pipe 218 protruding from the side surface of the main body, there is no substantial restriction on the outer diameter of the water discharge head 206. Although the inner pipe 228 of the water discharge head 206 needs to have the inner diameter matched with the outer diameter of the joint pipe 218, the inner diameter and the outer diameter of the outer shell 226 can be designed relatively freely. On the other hand, in the comparative example of FIGS. 16 and 17, it is necessary to make the outer diameters of the water discharge heads 240 and 241 coincide with the outer diameters of the

branch portions

246 and 247. 247 is regulated to an outer diameter of 247.

As shown in FIG. 15, when the joint pipe 218 protruding from the outer surface of the rotating unit 204 is accommodated in the water discharge head 206, the surface of the rotating unit 204 can be the boundary surface 205, so the second and third comparative examples are used. There is also an advantage that the joint is not conspicuous. In the case of the connection structure as in the second and third comparative examples, since the boundary surface 244 is conspicuous, the user may misunderstand that the hose can be pulled out from the joint portion by pulling the water discharge head 240. Conceivable.

In the case of the second and third comparative examples, if a gap is formed on the boundary surface 244, foreign matters such as dust are likely to enter the branch portion 246. On the other hand, even if a gap is formed in the boundary surface 205 of the second embodiment and a foreign substance enters the boundary surface 205, there is almost no possibility that the foreign substance enters the joint pipe 218 or the water discharge head 206. This is because the water discharge head 206 extends obliquely upward.

In particular, since the joint pipe 242 in the second comparative example becomes a protrusion from the water discharge head 240, the protrusion portion (the joint pipe 242) of the water discharge head 240 unexpectedly contacts the side surface of the rotating portion 238 and the like, There is a risk of damaging parts.

In the case of the second embodiment, even if there is some variation in the length of the joint pipe 218, it is easy to absorb the length variation by adjusting the insertion depth of the joint pipe 218 into the water discharge head 206. On the other hand, in the case of the second comparative example, the length of the joint pipe 242 is easily restricted by the length of the branch portion 246.

In the second embodiment, the inner tube 228 is involved in the connection with the rotating unit 204, but the outer shell 226 is not directly involved. Since the load accompanying the connection is not easily applied to the outer shell 226, the material of the outer shell 226 can be selected relatively freely.

FIG. 18 is a side view of the joint pipe 218.
A tubular member 272 having a smaller diameter is inserted into the joint pipe 218 at the tip, and a tapered outer diameter enlarged portion 274 that expands to a larger diameter is formed at a connection portion (root portion) with the rotating portion 204. . The joint pipe 218 and the rotating part 204 are integrally formed of resin. Resin is poured into a mold corresponding to the rotating part 204 and the joint pipe 218, and after fixing, the rotating part 204 and the like are removed from the mold. At this time, it is only necessary to apply a load to the portion of the joint pipe 218 that is not exposed to the outside, not the portion of the rotating portion 204 that is exposed to the outside, and remove it from the mold.

A notch 278 (first rotation restricting portion) is formed at the tip of the joint pipe 218. On the inner wall of the inner tube 228, a protrusion 282 (which will be described later with reference to FIGS. 20 and 22, a second rotation restricting portion) is formed, and the protrusion and the notch 278 engage with each other at the time of mounting. The circumferential rotation of the water discharge head 206 is restricted by the engagement between the protrusion 282 and the notch 278.

FIG. 19 is a schematic diagram showing a joint structure between the water discharge head 206 and the joint pipe 218.
First, the end surfaces of both the outer shell 226 and the inner tube 228 face the outer diameter enlarged portion 274. The outer shell 226 and the inner tube 228 form a tapered end surface (hereinafter referred to as “water discharge head end surface 280”), and the water discharge head end surface 280 (first taper surface) is a tapered outer surface of the outer diameter enlarged portion 274. The side surface (second tapered surface) has an inclination in at least the same direction and faces each other at an angle substantially parallel to each other. Since the tapered surfaces having substantially the same shape are opposed to each other, the gap (groove) of the boundary surface 205 is less noticeable. The water discharge head end surface 280 may contact the outer diameter enlarged portion 274 and the rotating portion 204. The water discharge head end surface 280 may be in contact with the outer diameter enlarged portion 274 or the rotating portion 204 over the entire circumference, or a part thereof may be in contact. In the case of partial contact, it is desirable to preferentially contact the upper surface side that is easily visible to the user. Similarly, it is desirable to make the upper surface side preferentially approach even when facing (not contacting) instead of contacting.

The inner surface of the inner tube 228 includes a small housing portion 284 as a water passage, a middle housing portion 286 (second housing portion) corresponding to the tubular member 272, and a large housing portion 288 (first housing portion) corresponding to the joint pipe 218. ). The inner diameter (first inner diameter) of the large accommodating portion 288 is larger than the inner diameter (second inner diameter) of the middle accommodating portion 286. A small first O-ring 252 is attached to the tubular member 272 having a relatively small outer diameter, and a relatively large second O-ring 250 is attached to the joint pipe 218. Both the first O-ring 252 and the second O-ring 250 are made of rubber. The main role of the first O-ring 252 is to prevent the water discharged from the tubular member 272 from flowing back and leaking from the fastener 220 and the boundary surface 205. Since the first O-ring 252 is small, it is easy to be surely attached and is not easily “flung”. Since it is easy to attach the first O-ring 252 to the correct position of the cylindrical member 272, it is easy to reliably stop water.

On the other hand, the main role of the second O-ring 250 is to prevent the water discharge head 206 from rattling. Since the second O-ring 250 is large, it is easier to improve the adhesiveness between the joint pipe 218 and the inner pipe 228 than the first O-ring 252. Further, since the second O-ring 250 is crushed when the water discharge head 206 is attached, the restoring force acts as a force pressing the water discharge head 206 against the rotating unit 204.

As described above, the water discharge head 206 is detachably attached to the faucet body 212. Since it is detachable at home, there is a possibility that the groove of the joint portion becomes large depending on the attachment situation. Therefore, instead of inserting the water discharge head 240 into the branching portion 246 as in the second comparative example of FIG. . As a result, since the surface of the rotating unit 204 becomes the boundary surface 205 as it is, the boundary surface 205 is less noticeable than in the second and third comparative examples.

Further, an outer diameter enlarged portion 274 is formed at the base of the joint pipe 218 in order to strengthen the joint between the joint pipe 218 and the rotating portion 204. The outer diameter enlarged portion 274 is formed in a curved surface shape, and the water discharge head end surface 280 is also formed in the same curved surface shape accordingly, so that the boundary surface 205 becomes more inconspicuous. The shape of the water discharge head end surface 280 matches the curved surface shape of the outer diameter enlarged portion 274 (or the rotating portion 204). Here, “match” means that the shape of the water discharge head end surface 280 is such that a large gap, for example, a gap of 1.0 mm or more does not occur in the opposite portion of the water discharge head 206 and the outer diameter enlargement portion 274. It means to be close to the curved surface shape of 274.

Since the water discharge head end surface 280 is formed so as to have the same shape as the outer diameter enlarged portion 274, the water discharge head 206 can be correctly connected by inserting the water discharge head 206 while aligning the direction of the water discharge head end surface 280 with the outer diameter enlarged portion 274. . Furthermore, if the protrusion (described later) formed on the inner surface of the notch 278 and the inner tube 228 is not properly engaged, the connection can be further ensured by preventing the water discharge head 206 from being set correctly. The wide end of the water discharge head end surface 280 also contributes to easy mounting of the water discharge head 206.

In summary, a tapered outer diameter enlarged portion 274 is formed in order to improve the joint strength between the joint pipe 218 and the rotating portion 204. The end surface of the water discharge head has the same shape as the outer surface of the outer diameter enlarged portion 274. By forming 280, the boundary surface 205 can be made inconspicuous. Moreover, since the outer surface shape of the outer diameter enlarged portion 274 and the shape of the water discharge head end surface 280 are the same, the water discharge head 206 can be easily mounted at the correct position.

The relatively large second O-ring 250 is fitted into the joint pipe 218 to ensure the connection between the joint pipe 218 and the water discharge head 206. The tubular member 272 is fitted with a relatively small first O-ring 252 to ensure water stoppage.

FIG. 20 is a cross-sectional view of the water discharge head 206 having no water purification function. FIG. 21 is a cross-sectional view of a faucet 200 a in which the water discharge head 206 is attached to the faucet body 212.
As described above, the water discharge head 206 has a double structure of the inner tube 228 and the outer shell 226, and the inner tube 228 is connected to the water discharge member 230 with the third O-ring 254 interposed therebetween. The outlet of the water outlet member 230 is capped by the rectifying member 232. The rectifying member 232 rectifies the flowing water from the inner pipe 228 and converts it into foam water.

A cylindrical member 272 is screwed into the joint pipe 218, and the first O-ring 252 stops water between the inner pipe 228 (small accommodating portion 284) and the cylindrical member 272. Between the water flow port 224 and the cylindrical member 272, water is stopped by another fourth O-ring 255. A joint pipe 218 is inserted into the inner pipe 228, and the water discharge head 206 faces or abuts against the rotating part 204 (outer diameter enlarged part 274). A second O-ring 250 is fitted between the inner tube 228 (large accommodating portion 288) and the joint tube 218 to prevent rattling. After the joint pipe 218 is inserted into the inner pipe 228, the catch 220 holds the joint pipe 218, so that the water discharge head 206 is firmly fixed to the joint pipe 218.

Further, as described in FIG. 21, a protrusion 282 (second rotation restricting portion) is formed on the inner surface of the inner tube 228. When the protrusion 282 is aligned with the notch 278 of the joint pipe 218 and the water discharge head 206 is inserted, the protrusion 282 and the notch 278 are engaged, and the water discharge head 206 is prevented from rotating in the circumferential direction. Note that a cutout 278 may be formed in the inner tube 228 and a protrusion 282 may be formed in the joint tube 218. In consideration of the workability of the notches 278 and the projections 282, the entire inner tube 228 and the joint tube 218 may be formed of resin, but only the portions of the notches 278 and the projections 282 may be formed of resin.

FIG. 22 is a cross-sectional view of a water discharge head 248 having a water purification function. FIG. 23 is a cross-sectional view of the faucet 200 b in which the water discharge head 248 is attached to the faucet body 212.
The water discharge head 248 having a water purification function also has a double structure of an inner tube 270 and an outer shell 264, and a water discharge member 260 is attached to the tip. A water purification handle 262 provided on the water discharge member 260 is an operation member for switching between raw water and purified water. The water discharge head end surface 280 of the water discharge head 248 is also formed as a curved surface matching the outer peripheral shape of the outer diameter enlarged portion 274 (see FIG. 22).

In the structure shown in FIG. 22, the inner tube 270 is fitted with the cartridge holding part 256 and includes the cartridge holding part 256 as a part thereof. A joint pipe 218 is inserted into the inner pipe 270. A fifth O-ring 266 is inserted between the inner tube 270 and the cartridge holding part 256. The cartridge holding unit 256 also includes a water purification cartridge 258, and the water purification cartridge 258 can be replaced by removing the water discharge member 260. There is a valve 268 inside the cartridge holder 256. When the water purification cartridge 258 is set, the water purification cartridge 258 pushes out the valve 268, and the inner pipe 270 and the cartridge holding part 256 (water purification cartridge 258) communicate with each other. On the other hand, when the water purification cartridge 258 is removed, the valve 268 is closed by the water pressure in the inner pipe 270. The valve 268 is a safety device for preventing the water in the inner pipe 270 from being sprayed from the tip of the water discharge head 248 as it is when the water purification cartridge 258 is removed in a water-permeable state.

23, a projection 282 (second rotation restricting portion) is formed on the inner side surface of the inner tube 270. By engaging the projection 282 with the notch 278 of the joint pipe 218, the water discharge head 206 is prevented from rotating in the circumferential direction.

[Third Embodiment]
FIG. 24 is an exploded perspective view of the water discharge head 206 according to the third embodiment of the present invention.
The water discharge head 206 includes a buffer member 234 as a part of the inner tube 228 in addition to the outer shell 226, the inner tube 228, the water discharge port member 230, and the flow regulating member 232. The third embodiment is the same as the second embodiment except that the buffer member 234 is provided. The buffer member 234 is a rubber spacer connected to the end of the inner tube 228, and comes into contact with the rotating unit 204 when the water discharge head 206 is connected. The buffer member 234 has a shape that covers the end surface of the outer shell 226. The buffer member 234 may be integrally formed with the inner tube 228, or may be integrated with the inner tube 228 by being bonded to the inner tube 228. In the third embodiment, the outer shell 226 of the water discharge head 206 does not come into direct contact with the faucet body 212, but comes into contact with the faucet body 212 through the buffer member 234. The end face of the buffer member 234 is formed as a tapered surface, and comes into contact with the tapered surface of the outer diameter enlarged portion 274 of the joint pipe 218. FIG. 25 is a cross-sectional view of the water discharge head 206 according to the third embodiment, and FIG. 26 is a cross-sectional view of a water faucet 200a in which the water discharge head 206 according to the third embodiment is attached to the water faucet main body 212. Both are the same as FIGS. 20 and 21 except that a buffer member 234 is added. The same applies to the case with a water purification function.

Since the buffer member 234 is made of rubber, it is difficult to damage the faucet body 212 when the water discharge head 206 is attached. Further, since the boundary surface 205 (joining portion) is blocked by the buffer member 234, it becomes easy to prevent the water discharge head 206 from rattling.

FIG. 27 is an enlarged perspective view of the periphery of the buffer member 234.
The buffer member 234 covers the end surface of the outer shell 226 on the faucet main body 212 side. The buffer member 234 may be a member having a higher elastic modulus than the outer shell 226. The contact width T of the contact surface 236 of the buffer member 234 is at least larger than the thickness of the outer shell 226. The side surface of the rotating unit 204 in the third embodiment has a curved surface shape (cylindrical shape), but the contact surface 236 of the buffer member 234 is also processed to a shape that matches the curved surface shape of the rotating unit 204. For this reason, the water discharge head 206 and the rotation part 204 can be connected with a smooth appearance without a gap.

Furthermore, since the water discharge head 206 and the rotating part 204 are connected via the elastic buffer member 234, the water discharge head 206 and the faucet body part 212 can be more closely adhered to each other. Further, since the contact surface 236 is enlarged by increasing the contact width T, the pressure accompanying the connection is easily dispersed, and the rotating portion 204 is hardly damaged by the connection of the water discharge head 206.

When the buffer member 234 is not installed as in the second embodiment, the outer shell 226 directly contacts or faces the rotating portion 204 (outer diameter enlarged portion 274). Also in this case, the pressure associated with the connection may be reduced by enlarging the end face of the outer shell 226, for example, by thickening the outer shell 226 at the end.

In the above, based on 3rd Embodiment, it demonstrated centering on the structure of the faucet 200, especially the connection structure of the water discharging head 206,248 and the faucet main-body part 212. FIG.
According to the third embodiment, the size of the

outer shells

226 and 264 of the water discharge heads 206 and 248 can be set relatively freely while the water discharge heads 206 and 248 can be attached to and detached from the faucet body 212. Since the boundary surface 205 between the water discharge heads 206 and 248 and the faucet main body 212 is not conspicuous, a clean design can be maintained while being replaceable. Further, by engaging the notch 278 and the protrusion 282, the water discharge head 206 is prevented from shifting in the rotation direction.

The present invention has been described based on the second and third embodiments. It is to be understood by those skilled in the art that these embodiments are illustrative, and that various modifications and changes are possible within the scope of the claims of the present invention, and that such modifications and changes are also within the scope of the claims of the present invention. It is understood. Accordingly, the description and drawings herein are to be regarded as illustrative rather than restrictive.

In the second and third embodiments, the description has been made assuming the replacement of the water discharge head 206 having no water purification function and the water discharge head 248 having a water purification function, but the present invention is not limited to this. For example, a water discharge head that does not have a shower function and a water discharge head that has a shower function may be exchanged, or a water discharge head having a different length according to the size of a user's body (for example, an adult and a child) is prepared. Also good. Also, if you change your mood by changing the wristband of your wristwatch, you can easily change the atmosphere of the kitchen by replacing the spout head with a different design even if it has no difference in function.

In the second and third embodiments, the water discharge head 206 and the rotating unit 204 have been described as both cylindrical, but a cylindrical member having an arbitrary cross-sectional shape such as an ellipse or a rectangle may be used. A casing that is not cylindrical may be used. The joint pipe 218 may be formed with the outer diameter enlarged portion 274 at the root portion, but the basic effect of the present invention can be realized even when the joint pipe 218 is not formed. Similarly, it is not an essential component that the water discharge head 206 has a double structure. The joint pipe 218 may be a separate part attached to the faucet main body 212. Although the example in which the water discharge head 106 is pushed to the base of the joint pipe 118 at the time of mounting is shown, the main configuration of the present invention is the type having the branching portion 146 as in the second comparative example and the third comparative example. It is feasible.

The following invention is recognized from the above description.
The faucet in an aspect of the present invention includes a faucet body having a joint pipe projecting from the side of the body, and a water discharge head that is detachably attached to the faucet body.
The water discharge head is attached to the faucet body in a state in which the joint pipe is accommodated up to the base portion of the joint pipe.

When connecting and removing the water discharge head freely at home, the joint between the water discharge head and the faucet body may become noticeable. In the case of a structure in which the water discharge head is inserted to the base of the joint pipe, the junction of the faucet body and the water discharge head becomes a joint portion, so that the joint portion is less noticeable.

¡The outer diameter of the joint pipe may be enlarged at the root portion. The water discharge head may be attached to the faucet body in a state in which at least a part of the outer diameter enlarged portion of the joint pipe is accommodated.

First and second rotation restricting portions that restrict rotation in the circumferential direction of the water discharge head may be formed on the outer surface of the joint pipe and the inner surface of the water discharge head.
The first and second rotation restricting portions may be any structures that can be engaged with each other. When the first and second rotation restricting portions are engaged with each other, it is easy to prevent the water discharge head from rotating and shifting in the axial direction.

Both or one of the first and second rotation restricting portions may be made of resin.

The water discharge head according to an aspect of the present invention is detachably connected to a faucet body having a joint pipe protruding from the side of the body. And it mounts | wears with a faucet main-body part in the state which accommodated the joint pipe to the root part of the joint pipe.

The faucet according to an aspect of the present invention includes a faucet body having a joint pipe protruding from the side of the body, and a water discharge head attached to the faucet body in a state where the joint pipe is detachably accommodated. A tapered surface is formed on the outer surface of the joint pipe. The water discharge head is attached to the faucet body with its end facing the tapered surface of the joint pipe.

テーパ A tapered surface is formed on the joint pipe, and the end of the water discharge head that accommodates the joint pipe is opposed to the tapered surface. When the water discharge head is freely attached and detached at home, the joint portion between the water discharge head and the faucet body may become conspicuous. By making the tapered surface of the joint pipe correspond to the joint portion, the depth of the groove of the joint portion can be reduced, so that the joint portion is less noticeable. Further, if a tapered surface is formed on the joint pipe, it becomes easy to strengthen the joint between the joint pipe and the faucet body.

A tapered surface may also be formed at the end of the water discharge head.

The water discharge head may be attached to the faucet body in a state in which the taper surface of the water discharge head and the taper surface of the joint pipe are in contact with each other.

The water discharge head may be in direct contact with the joint pipe, or may be in contact with the joint pipe through an intermediate material such as a buffer member. By the contact between the water discharge head and the joint pipe, it becomes easy to prevent the water discharge head from rattling.

The water discharge head may be attached to the faucet body in a state where the joint pipe is accommodated up to the root portion of the joint pipe.
In the case of a structure in which the water discharge head is inserted to the base of the joint pipe, the junction of the faucet body and the water discharge head becomes a joint portion, so that the joint portion is less noticeable.

Inside the water discharge head, a first housing part having a first inner diameter is formed on the end side, and a second housing part having a second inner diameter smaller than the first inner diameter is formed on the back side. Also good.

The water discharge head according to an aspect of the present invention is detachably connected to a faucet body having a joint pipe protruding from the side of the body. A first taper surface is formed at the end, and a second taper surface is formed on the outer surface of the joint pipe. The water discharge head is attached to the faucet body in a state where the first tapered surface is opposed to the second tapered surface.

The water discharge head according to an aspect of the present invention is detachably connected to a faucet body having a joint pipe protruding from the side of the body. The water discharge head has a double tube structure in which an inner tube that accommodates a joint tube is inserted into an outer shell, and the inner tube extends from the water discharge port to the end of the outer shell.

Since the inner tube and the outer shell have a double structure and the inner tube extends to the end of the outer shell, the strength of the water discharge head is improved over the entire area. Moreover, since the joint area of the inner pipe and the joint pipe can be increased by accommodating the joint pipe with the inner pipe extending to the end portion of the outer shell, the joint strength is easily improved. Further, by forming the inner tube and the outer shell separately, it becomes easy to form an inner tube having a complicated shape. Since the inner pipe is concealed by the outer shell, the influence associated with the production of the inner pipe is less likely to appear in the appearance. In addition, variations can be easily increased by sharing the inner tube and diversifying the outer shell. The outer shell is also not easily affected by the inner surface structure such as the connecting portion, and a relatively free shape can be easily realized.

The outer shell may be resin-plated.
If the outer shell is made of resin and is plated with resin, it is possible to provide an outer shell that is lightweight but has a beautiful appearance. Resin plating may affect the processing accuracy of the outer shell, but since the inner pipe that extends to the end of the outer shell is joined to the joint pipe, the resin plating of the outer shell increases the bonding strength. It has a configuration that is less likely to affect and less likely to rattle.

¡The outer diameter of the joint pipe may be enlarged at the root portion. The water discharge head may be attached to the faucet body in a state where at least a part of the outer diameter enlarged portion of the joint pipe is accommodated in the inner pipe.

A faucet according to an aspect of the present invention includes a faucet body having a joint pipe projecting from the side of the body, and a water discharge head that is detachably attached to the faucet body.
The water discharge head has a double pipe structure in which an inner pipe that accommodates a joint pipe is inserted into an outer shell. The inner tube extends from the water outlet to the end of the outer shell.

[Fourth Embodiment]
FIG. 28 is a side view of a faucet 400 according to the fourth embodiment of the present invention, and FIG. 29 is an exploded perspective view of the faucet 400. The faucet 400 includes a faucet body 412 and a water discharge head 406 that is detachably attached to a side surface of the faucet body 412. The faucet 400 is configured so that even a general user can replace the water discharge head 406 not equipped with the water purification function with another water discharge head 448 containing the water purification cartridge 458 (see also FIG. 37). Another water discharge head 448 will be described later.

Hereinafter, description will be made based on the XYZ rectangular coordinate system. The direction X corresponds to the horizontal left-right direction, the direction Y corresponds to the horizontal front-rear direction, and the direction Z corresponds to the vertical up-down direction. The direction Y and the direction Z are orthogonal to the direction X at right angles. The direction X may be described as the left direction or the right direction, the direction Y may be expressed as the forward direction or the rear direction, and the direction Z may be expressed as the upward direction or the downward direction. In FIG. 28, the right side of the faucet 400 viewed from the direction of the arrow P is called right and the left side is called left. In addition, the description of such a direction does not restrict | limit the use attitude | position of the water tap which concerns on the 4th Embodiment of this invention.

As shown in FIG. 29, the faucet 400 includes a faucet body portion 412 having a protruding tube portion 320 projecting from the side surface of the body, and a water discharge head 406 that is detachably attached to the faucet body portion 412. The protruding pipe part 320 includes a joint pipe 418 and a cylindrical member 472 that is inserted into the joint pipe 418 and is partially exposed in the axial direction. The water discharge head 406 accommodates the protruding pipe part 320. A housing portion 310 is provided. An urging mechanism 360 that urges the water discharge head 406 toward the water faucet main body 412 is provided between the water faucet main body 412 and the water discharge head 406. The urging mechanism 360 will be described later.

(Water faucet body)
The faucet body portion 412 includes a protruding tube portion 320, a connection joint 382, a water discharge handle 402, a rotating portion 404, a strut portion 408, and a strut cap 414. The faucet body 412 is erected in a columnar shape from the fixed surface. The protruding tube portion 320 protrudes radially, preferably obliquely upward, from the rotating portion 404 that is the side surface of the main body. Hereinafter, the direction along the central axis M of the protruding tube portion 320 is referred to as an axial direction, and the direction orthogonal to the central axis M is referred to as a radial direction.

The support column 408 is fixed to the kitchen or the like, and incorporates a part of the downstream side of the water pipe 410 for introducing tap water into the faucet body 412. A cylindrical rotating unit 404 is installed so as to cover the column unit 408. The rotating unit 404 has a function as a housing that covers the connection joint 382, the valve, the support column, and the like. The rotating unit 404 rotates in the horizontal direction around the column unit 408. The rotating portion 404 is subjected to resin plating, and a plated surface having a metallic luster is provided on the outer surface. The support cap 414 is provided on the upper side of the rotating unit 404 and connected to the support unit 408. The rotating portion 404 is positioned by the support cap 414 so as not to be pulled up and down. When the user moves the water discharge handle 402 on the support cap 414 in the vertical direction, the water discharge handle 402 moves the operation protrusion 416 back and forth, thereby a valve (not shown) built in the support column 408 and connected to the water conduit 410. Is opened and closed.

(Protruding tube)
As shown in FIG. 29, the protruding pipe portion 320 includes a joint pipe 418 and a cylindrical member 472. The joint pipe 418 is a tubular portion that protrudes continuously from the rotating portion 404. The tubular member 472 is inserted inside the joint pipe 418 and connected to the connection joint 382 through the water passage 424. The connection joint 382 is connected to the water pipe through a valve. The water discharge head 406 is detachably attached to the rotating portion 404 in a state where the protruding tube portion 320 is accommodated. As shown in FIG. 28, the end of the water discharge head 406 faces the side surface (outer peripheral surface) of the rotating unit 404. That is, at the base of the joint pipe 418 where the joint pipe 418 branches from the rotating part 404, the water discharge head 406 and the rotating part 404 (water faucet body part 412) face each other.

The water discharge head 406 includes an accommodating portion 310 that accommodates the protruding tube portion 320. The water discharge head 406 accommodates up to the root portion of the joint pipe 418 at the time of mounting. The water discharge head 406 is preferably in contact with the outer surface of the rotating unit 404, but at least close to the outer surface of the rotating unit 404 so that the connection portion between the rotating unit 404 and the water discharging head 406 is not noticeable.

An insertion port 422 extending in the circumferential direction is provided below the water discharge head 406. After inserting the protruding tube portion 320 into the housing portion 310 of the water discharge head 406, the user inserts the fastener 420 from the insertion port 422. The fastener 420 has a clip shape, and is formed of, for example, a resin having a predetermined strength and elasticity. When the water discharge head 406 is attached to the faucet body part 412, the protruding pipe part 320 is accommodated in the accommodation part 310 of the water discharge head 406, and the water discharge head 406 is pushed toward the rotating part 404. Next, the fastener 420 is pushed in from the insertion port 422 by hand. The water discharge head 406 is fixed to the rotating portion 404 by the clip 420 holding (holding) the joint pipe 418 like a clip. If the clip 420 is removed, the water discharge head 406 can be removed from the faucet body 412 by pulling the water discharge head 406 in the axial direction.

Note that the “detachable” in the fourth embodiment does not include a structure that completely fixes the water discharge head 406 and the faucet body 412 by bonding or welding. A structure in which a general user can attach and detach himself / herself at home, and a structure that does not require a dedicated tool for attaching and detaching such as a screwdriver is preferable. Therefore, in the faucet 400 of the fourth embodiment, the water discharge head 406 and the faucet body 412 are fixed by the fastener 420. The fastener 420 can be inserted and removed with a finger or a nail without using a tool. The fastener 420 may be removed by hooking an arbitrary metal rod or the like. The use of the fastener 420 is not an essential configuration.

Rotating part 404 may be rotated by applying a rotational force to water discharge head 406 for operation. At this time, the stress accompanying the rotation concentrates on the root portion of the joint pipe 418. For this reason, it is desirable to improve the connection strength between the joint pipe 418 and the rotating portion 404. Therefore, in the faucet 400 of the fourth embodiment, an outer diameter enlarged portion 474 having an outer diameter larger than the outer diameter of the central portion of the joint pipe 418 is provided at the root portion of the joint pipe 418. The outer diameter enlarged portion 474 has a tapered shape, for example.

The water discharge head 406 is pushed in and attached to the rotating portion 404 so as to accommodate all or part of the outer diameter enlarged portion 474. The water discharge head 406 may have its end abutted against the outer surface of the rotating portion 404 to completely accommodate the outer diameter enlarged portion 474.

From the viewpoint of securing the user's work space, it is preferable that the water discharge space that is the space between the water discharge head 406 and the sink is wide. Therefore, in the faucet 400 of the fourth embodiment, as shown in FIG. 28, the angle θ formed by the upper surface of the water discharge head 406 and the side surface extending upward from the water discharge head 406 of the water faucet main body 412 is an acute angle. Yes. By configuring in this way, compared to the case where the angle θ is an obtuse angle, since the downstream side of the water discharge head 406 is positioned upward, the distance from the sink is increased and the water discharge space can be widened.

(Water discharge head)
FIG. 30 is an exploded perspective view of the water discharge head 406. The water discharge head 406 includes an outer shell 426, an inner tube 428, a water discharge port member 430, and a rectifying member 432.

(Inner pipe)
The inner tube 428 is a tubular member extending substantially in the axial direction, and a housing portion 310 is provided at an upstream end. The accommodating part 310 accommodates the protruding pipe part 320 including the tubular member 472 and the joint pipe 418. The inner pipe 428 has a water passage portion 484 that is a passage for water inside, and tap water passes from the water passage pipe 410 through the tubular member 472 and the water passage portion 484 of the inner pipe 428 to the water outlet member. 430, water is discharged through a flow regulating member 432 to a sink (not shown).

The outer shell 426 is a casing of the water discharge head 406 and is a tubular member that covers the outside of the inner tube 428. That is, the water discharge head 406 has a double structure of the inner tube 428 and the outer shell 426. The water discharge head 406 has a double structure, thereby improving the strength of the water discharge head 406 as a whole. The rotating unit 404 is supported so as to be rotatable about the support column 408 as a rotation axis. The water discharge head 406 is connected to the protruding tube portion 320 branched from the rotating portion 404. As the rotating unit 404 rotates, the water discharge head 406 rotates together with the rotating unit 404. In addition, the connection joint 382 and the cylindrical member rotate together with the water discharge head 406.

Since the water discharge head 406 is provided on the extension of the protruding pipe part 320, the rotational force is transmitted to the joint pipe 418 of the protruding pipe part 320 as it is by rotating the water discharge head 406 in the horizontal direction. For this reason, the rotation operation by the user can be transmitted as the rotational force of the rotation unit 404. Since the protruding tube portion 320 is accommodated in the water discharge head 406, it does not form an appearance when the water discharge head 406 is attached.

The inner tube 428 may be extended from the water outlet member 430 to an end portion facing the rotating portion 404 of the outer shell 426 so as to cover almost the entire region of the outer shell 426. In particular, the end of the inner tube 428 and the end of the outer shell 426 are substantially coincident. When the inner pipe 428 is attached to the faucet body 412, the inner pipe 428 is pushed to accommodate all or part of the outer diameter enlarged portion 474. The inner tube 428 may have a shape in which a part of the inner tube 428 protrudes from the end of the outer shell 426.

Since the outer shell 426 constitutes the appearance, aesthetics are emphasized. Since the inner tube 428 is covered by the outer shell 426, there are few opportunities to configure the appearance, and the aesthetics are not so important. Since the inner pipe 428 is a passage for water and is directly connected to the joint pipe 418, high processing accuracy is particularly required for its internal structure.

The outer shell 426 and the inner tube 428 can be formed from a resin material such as ABS resin or polyacetal by a molding process. In this case, it is advantageous for weight reduction and cost reduction of the outer shell 426 and the inner tube 428. By reducing the weight of the outer shell 426, the replacement water discharge head 406 can be easily carried. The outer shell 426 is subjected to a resin plating process, and a plated surface having a metallic luster is provided on the outer surface.

In the process of plating resin parts, since resin parts are immersed in high-temperature plating solution, the resin parts may be deformed by high-temperature stress and the processing accuracy may be lowered. Therefore, in the water discharge head 406 according to the fourth embodiment, by forming a double structure in which the inner tube 428 is covered with the outer shell 426, a plated surface is formed on the outer shell 426 where aesthetics are important, and processing accuracy is improved. The emphasized inner tube 428 does not have a plated surface. In particular, the entire surface of the inner tube 428 including the first housing portion 486 and the second housing portion 488 is composed of a non-plated surface.

The outer surface of the rotating part 404 has a curved surface shape that is a cylindrical shape. The end surface of the outer shell 426 and the end surface of the inner tube 428 have a shape that matches the curved shape of the outer surface of the rotating unit 404. In particular, the end surface of the outer shell 426 and the end surface of the inner tube 428 have a shape that matches the tapered surface of the outer diameter enlarged portion 474. By comprising in this way, the water discharging head 406 and the rotation part 404 can be connected without gap.

(Removal mechanism)
Next, the attachment / detachment mechanism of the faucet 400 will be described. In the fourth embodiment, the water discharge head 406 is connected to the faucet main body 412 by housing the protruding tube portion 320 protruding from the rotating portion 404 in the housing portion 310 of the water discharge head 406. The accommodating part 310 includes a first accommodating part 486 and a second accommodating part 488 described later. A boundary portion that is a connecting portion between the water discharge head 406 and the rotating portion 404 is formed at the base of the joint pipe 418 of the protruding pipe portion 320. In the faucet 400, the water discharge head 406 covers the joint pipe 418 and the cylindrical member 472 of the protruding pipe part 320 protruding from the side surface of the main body. Therefore, the outer diameter of the outer shell 426 of the water discharge head 406 can be designed relatively freely. Moreover, when it is set as the structure which connects a water discharge head in the middle of a protrusion pipe part, when exchanging for another water discharge head from which the outer diameter of a water discharge head differs, a level | step difference will be produced in a connection part. Moreover, since there is a deviation due to manufacturing variations in the outer diameter of the water discharge head and the outer diameter of the protruding pipe portion, a step due to the difference in outer diameter may occur in these connecting portions. A state having such a step cannot be said to have a good appearance. Therefore, in the faucet 400 according to the fourth embodiment, the water discharge head 406 is attached to the faucet main body 412 in a state where the protruding pipe part 320 is accommodated up to the root part of the protruding pipe part 320. By configuring in this way, the water discharge head 406 is connected at the base portion of the projecting pipe portion 320, so that a step due to an outer diameter difference or an outer diameter manufacturing error can be eliminated. Further, since it is not necessary to consider the difference in the outer diameter of the connecting portion, the outer diameter of the outer shell 426 can be designed relatively freely.

As shown in FIG. 28, in the configuration in which the water discharge head 406 accommodates the protruding tube portion 320 protruding from the outer surface of the rotating portion 404 up to the root portion, the surface of the rotating portion 404 becomes the boundary portion, and therefore the boundary surface is the protruding tube. Compared with the case where the portion 320 is in the middle of the axial direction, the connecting portion is less noticeable. As shown in FIG. 28, the water discharge head 406 is directly connected to the rotating portion 404 while the inner tube 428 accommodates the protruding tube portion 320. The outer shell 426 covers the connecting portion of the inner tube 428 and does not directly participate in the connecting portion. For this reason, since the outer shell 426 is not easily subjected to stress due to connection, the degree of freedom in designing the shape and material of the outer shell 426 can be increased.

FIG. 31 is a side view of the periphery of the protruding tube portion 320 of the faucet 400. FIG. 31 shows a state where the O-ring 452 is not attached. As shown in FIG. 31, the protruding tube portion 320 includes a joint tube 418 and a tubular member 472. The tubular member 472 has an outer diameter smaller than the distal end portion of the joint pipe 418 and is inserted into the joint pipe 418. One end 472a on the upper side (downstream side) of the tubular member 472 protrudes in the axial direction from the joint pipe 418 and is exposed from the joint pipe 418. The other end 472b on the lower side (upstream side) of the cylindrical member 472 is inserted into the water passage 424 in the rotating portion 404 and connected to the connection joint 382 (see also FIG. 28). An outer diameter enlarged portion 474 is formed at a connection portion of the joint pipe 418 with the rotating portion 404. The outer diameter enlarged portion 474 has a tapered shape in which the outer diameter increases as the rotating portion 404 is approached. The joint pipe 418 is formed by molding from a resin material integrally with the rotating portion 404. When the joint pipe 418 and the rotating part 404 are removed from the mold, a portion corresponding to the joint pipe 418 may be extruded. In this case, damage to the rotating unit 404 exposed to the outside can be reduced.

(Engagement groove)
As shown in FIG. 31, in the faucet 400, an engagement groove 490 is provided in the cylindrical portion of the joint pipe 418. Engaging protrusions (not shown), which are protrusions provided in the outer surface of the cylindrical member 472 and projecting in the radial direction, are engaged with the engaging groove portion 490. The cylindrical member 472 is connected to the joint pipe 418 by engaging the engaging convex portion with the engaging groove portion 490.

29, the end face of the outer shell 426 and the end face of the inner tube 428 are opposed to the outer diameter enlarged portion 474. The outer shell 426 and the inner tube 428 are provided with a water discharge head end surface 480 which is a tapered end surface (see also FIG. 36). The tapered surface of the water discharge head end surface 480 faces the tapered surface of the outer surface of the outer diameter enlarged portion 474 at a substantially parallel angle. By making the taper surface of the water discharge head end surface 480 the same curved surface shape as the taper surface of the outer diameter enlarged portion 474, the gap at the boundary portion can be made inconspicuous. The water discharge head 406 may face the rotation unit 404 when at least a part of the water discharge head end surface 480 is in contact with or not in contact with the rotation unit 404. The “same curved surface shape” as used herein refers to the shape of the water discharge head end surface 480 to such an extent that a large gap, for example, a gap of 1.0 mm or more does not occur in the facing portion of the water discharge head 406 and the outer diameter enlarged portion 474 Is approximated to the curved surface shape of the outer diameter enlarged portion 474.

(Container)
As shown in FIG. 28, a water passage portion 484, a first housing portion 486, and a second housing portion 488 are provided on the inner side surface of the inner tube 428. The water passage portion 484 is a water passage provided on the downstream side of the first housing portion 486. The first accommodating portion 486 is provided on the downstream side of the second accommodating portion 488 and mainly accommodates the tubular member 472. The second accommodating portion 488 is provided on the upstream side of the first accommodating portion 486 and mainly accommodates the joint pipe 418. An upstream end surface 488a of the second accommodating portion 488 forms a water discharge head end surface 480 (see also FIG. 36). The first accommodating portion 486 has an inner diameter larger than that of the water passage portion 484, and the second accommodating portion 488 has an inner diameter larger than that of the first accommodating portion 486. Since the accommodating portion 310 has a two-stage structure including a first accommodating portion 486 having a small diameter and a second accommodating portion 488 having a large diameter, a seal is formed between the first accommodating portion 486 and the tubular member 472 to prevent water leakage. It is possible to suppress the play in the radial direction between the second housing portion 488 and the joint pipe 418.

As shown in FIG. 28, the tubular member 472 has an outer diameter smaller than that of the joint pipe 418, and an O-ring 452 is attached to the outer peripheral surface thereof. The O-ring 452 is formed from a material such as rubber having elasticity. The O-ring 452 suppresses leakage of water as a seal between the tubular member 472 and the first housing portion 486.

(Biasing mechanism)
Next, the urging mechanism 360 will be described. FIG. 32 is an explanatory view showing the periphery of the urging mechanism 360. The urging mechanism 360 is provided between the faucet main body 412 and the water discharge head 406. The urging mechanism 360 is configured to urge the water discharge head 406 toward the faucet body portion 412 in a state where the water discharge head 406 is attached to the faucet body portion 412. The urging mechanism 360 is incorporated in the urging mechanism mounting portion 370 of the joint pipe 418 (see also FIG. 31). As shown in FIG. 32, the urging mechanism 360 includes an elastic body 366, a sliding member 364, a fastener 420, and a first insertion port 422a. The elastic body 366, the sliding member 364, and the fastener 420 are attached to the urging mechanism attachment portion 370.

(Biasing mechanism mounting part)
The urging mechanism mounting portion 370 will be described. As shown in FIG. 31, the faucet 400 is provided with an urging mechanism mounting portion 370 that is a part for incorporating the urging mechanism 360 into the joint pipe 418. The urging mechanism mounting portion 370 includes a substantially cylindrical small-diameter portion 377 that is recessed in the radial direction from the outer peripheral portion 418e. The small diameter portion 377 is a portion formed with a smaller diameter than the outer peripheral portion 418e. The small diameter portion 377 is provided with an elastic member mounting portion 371, a sliding member mounting portion 372, and a fastener mounting portion 373 from the downstream side. An annular elastic body 366 is fitted into the elastic member mounting portion 371. A sliding member 364 is fitted into the sliding member mounting portion 372. A fastener 420 is attached to the fastener attachment portion 373.

The elastic member mounting portion 371, the sliding member mounting portion 372, and the fastener mounting portion 373 each have a cylindrical surface. The cylindrical surfaces of the elastic member mounting portion 371 and the sliding member mounting portion 372 are formed with substantially the same diameter, and no step is formed at the boundary between them, and they are connected uniformly. The cylindrical surface of the fastener mounting portion 373 has a larger diameter than the cylindrical surface of the sliding member mounting portion 372, and a step portion 378 is provided at the boundary between them. The step portion 378 limits the operating range of the sliding member 364 in the axial direction.

In a part of the circumference of the small-diameter portion 377, a restricting convex portion 374 that is a portion protruding in the radial direction extends from the fastener mounting portion 373 to the sliding member mounting portion 372 in the axial direction. As shown in FIG. 31, the limiting convex portion 374 is located above the small diameter portion 377. The biasing mechanism 360 has an upstream wall portion 375 on the upstream side of the small diameter portion 377 and a downstream wall portion 376 on the downstream side of the small diameter portion 377. The upstream wall portion 375 and the downstream wall portion 376 extend in the radial direction from the upstream end and the downstream end of the small diameter portion 377 toward the outer peripheral portion 418e, respectively. The end surface of the fastener 420 abuts on the upstream wall 375 and the elastic body 366 abuts on the downstream wall 376.

(Elastic body)
Next, the elastic body 366 will be described. FIG. 33 is an explanatory diagram of the elastic body 366, in which FIG. 33 (a) shows a side view and FIG. 33 (b) shows a front view. FIG. 33A shows a part in a cross section. The elastic body 366 may be an O-ring that is an annular rubber member, for example. The elastic body 366 is fitted into the elastic member mounting portion 371 of the small diameter portion 377. The downstream end surface of the elastic body 366 contacts the downstream wall portion 376.

Next, the function of the elastic body 366 will be described. As the urging mechanism, it is desirable that the urging force can be generated by a simple mechanism. Therefore, in the faucet 400, the biasing mechanism 360 includes an elastic body 366 interposed between the faucet main body 412 and the water discharge head 406. By including the elastic body 366, the elastic body 366 itself generates a biasing force, so that the mechanism becomes simple and it is possible to configure with a small number of parts.

It is desirable that the elastic body has a small shape that can be accommodated between the faucet body 412 and the water discharge head 406. Therefore, in the faucet 400, the elastic body 366 is compressed in a state where the water discharge head 406 is attached to the faucet body 412. In this case, since the elastic body 366 is mounted in a state compressed in the thickness direction, the accommodation space can be reduced. The compressed elastic body 366 outputs a thrust J (see also FIG. 32) directed to the faucet body 412 side by a repulsive force in the thickness direction. Note that it is not essential that the elastic body is mounted in a compressed state.

(Sliding member)
Next, the sliding member 364 will be described. FIG. 34 is an explanatory view of the sliding member 364. FIG. 34 (a) shows a side view and FIG. 34 (b) shows a front view. As an example, the sliding member 364 has a hollow disk shape and a substantially C-letter shape with a part cut away. The sliding member 364 is provided with a first surface 364a on the downstream side, a second surface 364b on the upstream side, an inclined surface 364c, and a notch 364d. The second surface 364b is formed with a smaller diameter than the first surface 364a. The inclined surface 364c has an inclination so as to approach the first surface 364a from the outer peripheral portion of the second surface 364b toward the outer side. The cutout portion 364d is provided on the upper portion of the sliding member 364 so as to sandwich the limiting convex portion 374 through a gap. By sandwiching the limiting convex portion 374, the sliding member 364 is easily formed in the axial direction with the limiting convex portion 374 as a guide. The sliding member 364 may be formed by molding from a resin material having good sliding properties such as polyacetal.

Next, the function of the sliding member 364 will be described. When the sliding member 364 is not provided, in order to make the elastic body 366 compressed with the fastener 420 attached, the upstream side of the elastic body 366 is placed on the upstream side of the elastic body 366 while the elastic body 366 is not compressed. It overhangs the region 373. In this case, the region of the fastener mounting portion 373 becomes narrow, and when the fastener 420 is inserted, it is difficult to insert the fastener 420 sufficiently to the back by rubbing directly with the elastic body 366. Further, the elastic body 366 may be deformed or scratched due to friction when the fastener 420 is inserted. In particular, when the elastic body 366 is made of rubber, the frictional resistance when inserting the fastener 420 is large. Therefore, the faucet 400 includes a sliding member 364 interposed between the fastener 420 and the elastic body 366 in the biasing mechanism 360. The sliding member 364 has an upstream end surface in contact with the fastener 420 and a downstream end surface in contact with the elastic body 366. By forming the sliding member 364 from a material having good slidability, the frictional resistance when inserting the fastener 420 can be reduced. Further, since the elastic body 366 and the fastener 420 are not in direct contact with each other, it is possible to suppress deformation and damage of the elastic body 366 when the fastener 420 is inserted. When the fastener 420 is not attached, the second surface 364b and the inclined surface 364c on the upstream side of the sliding member 364 slightly protrude into the region of the fastener attachment portion 373 and the downstream wall portion of the first insertion port 422a. Projects upstream from 422ab. When inserting the clasp 420, the inclined surface 364c serves as a guide, and the clasp 420 is inserted to the back side along the slanted surface 364c, and the clasp 420 pushes the sliding member 364 to the downstream side, thereby elastic body 366. Is compressed. Further, since the operating range in the axial direction of the sliding member 364 is limited by the step 378 at the boundary between the fastener mounting portion 373 and the sliding member mounting portion 372, the fastener mounting in the state where the fastener 420 is not mounted. The amount of protrusion to the region of the portion 373 is maintained appropriately, and the fastener 420 can be easily inserted.

(Fastener)
Next, the fastener 420 will be described. FIG. 35 is an explanatory diagram of the fastener 420, in which FIG. 35 (a) shows a front view, FIG. 35 (b) shows a side view, and FIG. 35 (c) shows a bottom view. As an example, the fastener 420 includes a pair of leg portions 420b extending upward from both ends of a base portion 420a extending in the left-right direction, and has a so-called clip shape. As for the fastener 420, the base part 420a and a pair of leg part 420b are integrally formed from the resin material. At the lower part of the base part 420a, a hooking part 420f is provided for being sandwiched by a fingernail or a tool. The hooking portion 420f has a shape that is recessed in the thickness direction, so that a gap that allows a nail or a tool to be inserted between the hooking portion 420f and the insertion port 422 with the fastener 420 attached to the insertion port 422 is provided. Form. A recess 420e is formed inside the base of the leg 420b of the base 420a in order to improve the flexibility of the leg 420b.

(Inlet)
As shown in FIG. 32, the insertion port 422 includes a first insertion port 422a formed in the outer shell 426 and a second insertion port 422b formed in the inner tube 428. The first insertion port 422a and the second insertion port 422b are connected in the radial direction. The first insertion port 422a and the second insertion port 422b are substantially rectangular or oval openings that are horizontally long when viewed from below. The fastener 420 passes through the first insertion port 422a and the second insertion port 422b in the radial direction and grips the joint pipe 418. The biasing force H is input to the first insertion port 422a via the fastener 420. At this time, it is desirable to make the gap between the outer shell 426 and the faucet body 412 as small as possible. Therefore, in the faucet 400, the second insertion port 422b of the inner tube 428 is formed wider in the axial direction than the first insertion port 422a of the outer shell 426. With this configuration, a gap is formed between the second insertion port 422b and the fastener 420, and the biasing force H can be preferentially applied to the first insertion port 422a of the outer shell 426. As a result, the gap between the outer shell 426 and the faucet body 412 can be made as small as possible. The first insertion port 422a and the fastener 420 are preferably formed so that the axial widths thereof substantially coincide.

Next, the operation of the urging mechanism 360 will be described. As shown in FIG. 32, the elastic body 366 outputs a thrust J to the fastener 420 via the sliding member 364 while being fitted in the elastic member mounting portion 371. The fastener 420 that has received the thrust J outputs a biasing force H to the wall 422aa on the upstream side of the first insertion port 422a of the outer shell 426. As a result, the water discharge head 406 is urged toward the faucet body 412 in the axial direction.

Since there is a manufacturing error in the gap between the water discharge head end surface 480 and the rotating portion 404 of the faucet body 412, if it is attempted to eliminate the gap in the entire area of the water discharge head end surface 480, the manufacturing yield may be reduced. There is. In particular, since the shape of the water discharge head end face 480 that matches the outer peripheral surface of the faucet body 412 is complicated, it is difficult to make the shape completely coincide. Therefore, in the faucet 400, the upper part 480a of the water discharge head end surface 480, which is the facing part facing the rotation part 404 of the faucet body part 412 of the water discharge head 406, is provided closer to the rotation part 404 than the lower part 480b. (See also FIG. 36). Since the gap of the upper part 480a of the water discharge head end surface 480 is more conspicuous from the user than the gap of the lower part 480b, the upper part 480a of the water discharge head end face 480 can be set to be close to the rotating unit 404 in preference to the lower part 480b. For example, the upper portion 480a of the water discharge head end surface 480 is set so as to protrude from the lower portion 480b to the rotating portion 404, and the water discharge head 406 is urged toward the faucet body portion 412 by the urging mechanism 360. Can be closer to the rotating portion 404 than the lower portion 480b. Since the gap of the upper part 480a that can be easily seen by the user can be reduced, the decrease in aesthetics due to this gap is alleviated. The upper part 480 a of the water discharge head end surface 480 may abut on the faucet body 412.

Next, the structure of the faucet 400 will be described. FIG. 36 is a cross-sectional view of the water discharge head 406 of the faucet 400 according to the fourth embodiment, which is the water discharge head 406 connected to the water faucet body 412 of FIG. Hereinafter, a faucet equipped with a water discharge head 406 that does not have a water purification function in the faucet body 412 may be referred to as a faucet 400a. As shown in FIG. 36, the inner tube 428 of the water discharge head 406 is connected to the water discharge port member 430. Water is stopped by an O-ring 454 between the inner tube 428 and the water outlet member 430. The outlet of the spout member 430 is capped by a rectifying member 432. The rectifying member 432 rectifies the flowing water from the inner pipe 428 and converts it into foam water.

28, the tubular member 472 is inserted into the joint pipe 418, and the lower end (upstream side) other end 472b of the tubular member 472 is connected to the water inlet 424. The O-ring 455 stops water between the other end 472b of the cylindrical member 472 and the water flow port 424.

The water discharge head 406 is fixed to the joint pipe 418 when the fastener 420 holds the joint pipe 418 in a state where the joint pipe 418 is inserted into the inner pipe 428. In particular, the fastener 420 is inserted from the first insertion port 422 a of the outer shell 426 and grips the joint pipe 418 through the second insertion port 422 b of the inner tube 428.

(Another spout head)
Next, another water discharge head 448 incorporating the water purification cartridge 458 will be described. FIG. 37 is a cross-sectional view of another water discharge head 448 having a water purification function. Another water discharge head 448 includes an inner tube 470, an outer shell 464, a water discharge member 460, a water purification handle 462, an O-ring 466, a valve 468, a cartridge holder 456, and a water purification cartridge 458. In particular, another water discharge head 448 includes an inner pipe 470 that receives water from the faucet body 412, and the inner pipe 470 is provided with a cartridge holding portion 456 for holding the water purification cartridge 458. The outer circumference of the inner tube 470 is covered by the outer shell 464. Another water discharge head 448 has a double structure of an inner tube 470 and an outer shell 464. A joint pipe 418 is inserted into the inner pipe 470. The water discharge member 460 is attached to the downstream end of the inner tube 470. The purified water handle 462 is an operation member for switching between raw water and purified water, and is provided on a side surface of the outer shell 464 that is closer to the downstream side.

The cartridge holding portion 456 is fitted with the inner tube 470 and provided as a part of the inner tube 470. The O-ring 466 is inserted between the inner tube 470 and the cartridge holding part 456. The water purification cartridge 458 is built in the cartridge holding part 456. The water purification cartridge 458 can be replaced by removing the water discharge member 460.

The valve 468 is provided inside the cartridge holding part 456. The valve 468 is pushed out by the water purification cartridge 458 set in the cartridge holding part 456, and connects the inner tube 470 and the cartridge holding part 456. The valve 468 is closed by the water pressure in the inner pipe 470 when the water purification cartridge 458 is removed. In other words, the valve 468 is a safety device that prevents the water in the inner pipe 470 from being directly sprayed from the tip of another water discharge head 448 when the water purification cartridge 458 is removed in a water-flowing state.

FIG. 38 is a cross-sectional view of the faucet 400b in a state where another water discharge head 448 is mounted on the faucet body 412. FIG. The faucet 400b is obtained by removing the water discharge head 406 having no water purification function from the water faucet body 412 of the water faucet 400a and replacing it with another water discharge head 448 having a water purification function. Another water discharge head 448 is fixed to the joint pipe 418 when the fastener 420 holds the joint pipe 418 in a state where the joint pipe 418 is inserted into the inner pipe 470. In particular, the fastener 420 is inserted from the first insertion port 422 a of the outer shell 464 and grips the joint pipe 418 through the second insertion port 422 b of the inner tube 470. In this manner, another water discharge head 448 can be easily attached to and detached from the faucet body 412 by the same method as the water discharge head 406.

(Check valve)
Next, the check valve 350 will be described. FIG. 39 is a front view of the faucet 400. The faucet 400 includes a water pipe 410a for introducing non-heated tap water into the water pipe 410 and another water pipe 410b for introducing heated hot water. The water pipe 410a is provided with a check valve 350a, and the other water pipe 410b is provided with a check valve 350b.

Another water discharge head 448 having a water purification function has a large water flow resistance in the water purification cartridge 458 and has a higher pressure than the water discharge head 406, so that the pressure on the upstream side of the faucet body 412 is reduced (in particular, In the case where a pressure difference is generated between the water flow pipe 410 a for introducing tap water into the faucet main body 412 and another water flow pipe 410 b), there is a higher possibility of backflow compared to the water discharge head 406. Therefore, in the faucet 400 of the fourth embodiment, a check valve 350 is provided in the faucet body 412 or in the water channel upstream of the faucet body 412. By providing the check valve 350, it is possible to suppress the backflow of water to the upstream side.

In the faucet 400 of the fourth embodiment, a check valve 350 is provided in the water conduit 410 for introducing tap water into the faucet body 412. In this case, it is advantageous from the viewpoint of miniaturization of the faucet body 412.

Next, the operation of the check valve 350a will be described. The operation of the check valve 350a is common to the operation of the check valve 350b. FIG. 40 is a schematic diagram showing the operation of the check valve 350a. 40A shows a state where the check valve 350a is opened, and FIG. 40B shows a state where the check valve 350a is closed. The check valve 350a is provided in the water flow pipe 410a on the upstream side of the faucet body 412 and is provided below a fixed surface (a kitchen counter or the like) to which the faucet body 412 is fixed. The check valve 350a is formed in a joint 348 for connecting the water pipe 410a to the upstream water pipe. The joint 348 includes a joint body portion 353, a joint cup portion 358, and a female screw portion 358a. The joint trunk portion 353 is a hollow cylindrical portion, and a water channel for the check valve 350a is formed on the inner peripheral surface thereof. The joint cup portion 358 is a hollow cylindrical portion provided on the upstream side of the joint body portion 353, and an internal thread portion 358a is formed on the inner peripheral surface thereof. The joint cup part 358 may be integrally formed with the joint body part 353 and a metal material such as brass. The outer diameter and inner diameter of the joint cup portion 358 are formed larger than the joint body portion 353.

The check valve 350 a includes a valve member 351, a valve seat member 352, a guide 354, a spring 355, an O-ring 356, and an O-ring 357. The valve seat member 352 is a hollow annular member, and is fixedly provided on the inner peripheral surface of the joint body 353. An O-ring 357 is fitted between the valve seat member 352 and the joint body 353. A valve seat 352a is formed at a region where the valve body 351a of the valve member 351 contacts the end of the valve seat member 352. The valve member 351 includes a valve body 351a and a shaft portion 351b. The shaft portion 351b is a rod-shaped portion extending downstream from the valve body 351a and is formed with a smaller diameter than the valve body 351a. The shaft portion 351b and the valve body 351a may be integrally formed from a metal material such as brass. An O-ring 356 is fitted on the outer peripheral surface of the valve body 351a.

The guide 354 is a hollow cylindrical member fixedly provided in the middle inside the joint body 353. The valve member 351 is movably supported by the guide 354 when the shaft portion 351b is slidably accommodated in the inner peripheral portion of the guide 354. By being supported by the guide 354, the valve member 351 can freely move between the upstream side and the downstream side in the direction of the water channel (vertical direction in FIG. 40). The spring 355 is a coil spring that surrounds the shaft portion 351b, and has one end in contact with the inner surface of the joint body 353 and the other end in contact with the downstream surface of the valve body 351a. The valve member 351 is pressed toward the valve seat member 352 by inputting the repulsive force of the spring 355 and the water pressure.

The check valve 350 a is closed when the valve member 351 comes into contact with the valve seat member 352 and is opened when the valve member 351 is separated from the valve seat member 352. In the check valve 350a, as shown in FIG. 40 (a), when the upstream water pressure is higher than the downstream side, the valve member 351 is separated from the valve seat member 352 due to the pressure difference, and the water pressure is increased as indicated by the arrow 359a. Flows. On the other hand, when the water pressure on the downstream side is higher than that on the upstream side, as shown in FIG. 40 (b), the valve member 351 is pressed toward the valve seat member 352 due to the pressure difference, and the check valve 350a is closed. The water flow is interrupted as indicated by arrow 359b. As a result, the reverse flow of the downstream water to the upstream side can be suppressed.

Next, the characteristics of the faucet 400 configured as described above will be described.
In the faucet 400, the faucet body 412 is configured to be replaceable from a water discharge head 406 having no water purification function to another water discharge head 448 having a water purification function. This makes it easier to replace a faucet without a water purification function with a water faucet with a water purification function than when replacing the entire faucet, and allows the user to easily replace it at home. Therefore, the replacement cost can be kept low. Further, since the water purification cartridge can be built in the water discharge head 448, the discomfort in appearance is reduced and the appearance is improved as compared with the case where a water purifier protruding below the faucet of the faucet is retrofitted. Further, since the water purification cartridge is built in the water discharge head 448, the protrusion to the lower side of the water discharge port is suppressed, and the space between the sink and the sink is not impaired, and it is easy to use.

In the faucet 400, a check valve 350 is provided in the faucet body 412 or on the upstream side of the faucet body 412. For this reason, when a user who has purchased a water faucet without a water purification function replaces the water discharge head 406 with another water discharge head 448 after purchase, the user can purchase the water stop head 448 downstream of the water faucet body 412 without adding a check valve. Backflow of the water on the upstream side to the upstream side can be suppressed. That is, since the check valve 350 is provided in the faucet 400 in preparation for replacing the water discharge head in advance, the user only needs to replace the water discharge head.

The faucet 400 has a water conduit 410a for introducing tap water into the faucet body 412. The check valve 350 includes a check valve 350a provided in the water conduit 410a. For this reason, even when the pressure on the downstream side rises, the possibility that water flows backward through the water flow pipe 410a can be reduced.

The water faucet 400 has another water pipe 410b for introducing hot water into the water faucet main body 412. The check valve 350 includes a check valve 350b provided in another water pipe 410b. For this reason, even when the pressure on the downstream side rises, the possibility that water flows backward through the water flow pipe 410b can be reduced.

In the faucet 400, the faucet body 412 has a joint pipe 418 that protrudes from the side surface of the faucet body 412 and is accommodated in the water discharge head 406. For this reason, it is easy to replace the water discharge head 406, and the connection portion with the inner pipe of the water discharge head is provided in the region protruding from the faucet body portion 412, so even if the connection portion does not sufficiently adhere, Leaks can be found and corrected early.

[Fifth Embodiment]
Next, a faucet 500 according to a fifth embodiment of the present invention will be described. 41 is a side view of the faucet 500, and FIG. 42 is a partial cross-sectional view of the faucet 500 taken along the line AA. In the faucet 500, the check valve 550 is provided in the faucet body 512 instead of the check valve 350, and the buffer member 434 is provided between the water discharge head 406 and the faucet body 512. Unlike 400, the other structure is the same as that of the faucet 400. Therefore, the points of difference will be described with emphasis and overlapping descriptions will be omitted. The faucet 500 of the fifth embodiment is configured to be replaceable from a water discharge head 406 having no water purification function to another water discharge head 448 having a water purification function, similarly to the water faucet 400 of the fourth embodiment. The The faucet body 512 has a similar configuration corresponding to the faucet body 412 and is different in that a check valve 550 is provided. The faucet body 512 includes a support column 508, a rotating unit 404, and a joint pipe 418.

(Check valve)
Next, the check valve 550 will be described. The check valve 550 includes check valves 550 a and 550 b that are provided in the middle of the column portion 508 of the faucet body portion 512. The check valve 550a is provided between the upstream water channel 560a and the downstream water channel 560b in the middle of the water channel 560 communicating with the water pipe 410a. The check valve 550b is provided between the upstream water channel 561a and the downstream water channel 561b in the middle of the water channel 561 communicating with the water pipe 410b. The check valves 550a and 550b include a valve member 551, a valve seat member 552, a guide 554, a spring 555, an O-ring 556, and an O-ring 557. The valve member 551 is the valve member 351, the valve seat member 552 is the valve seat member 352, the guide 554 is the guide 354, the spring 555 is the spring 355, the O-ring 556 is the O-ring 356, and the O-ring 557 is the O-ring 357. Correspondingly, a similar configuration is provided and a similar operation is performed. As a result, the faucet 500 can suppress the reverse flow of water to the upstream side even when the water discharge head 406 having no water purification function is replaced with another water discharge head 448 having a water purification function.

(Buffer member)
Next, the buffer member 434 will be described. 43 is a perspective view of the buffer member 434 of the faucet 500. FIG. FIG. 43A is a perspective view of the buffer member 434 viewed from the side, and FIG. 43B is a perspective view of the buffer member 434 viewed from the rear. The buffer member 434 is a rubber spacer provided between the faucet body 512 and the water discharge head 406. The buffer member 434 includes a cylindrical portion 434b and an overhang portion 434c. The cylindrical portion 434 b is a cylindrical portion that is coupled to the upstream side of the inner tube 428. The overhang portion 434c is a portion overhanging in the radial direction from the upstream side of the tubular portion 434b. The overhanging portion 434c is provided with a contact surface 436 and a curved edge portion 434a that is a curved outer edge. The contact surface 436 is a portion that contacts the faucet body 512 at the upstream end surface of the overhang portion 434c. The curved edge portion 434a is a portion provided on the outer edge of the overhang portion 434c. In the faucet 500, the outer shell 426 of the water discharge head 406 does not come into direct contact with the faucet body 512, but comes into contact with the faucet body 512 through the buffer member 434.

In the buffer member 434, the overhang portion 434c covers the end surface of the outer shell 426 on the faucet body portion 512 side. With this configuration, since the overhanging portion 434c of the buffer member 434 is sandwiched in the gap between the faucet main body 512 and the water discharge head 406, this gap becomes inconspicuous and the aesthetics are improved. In particular, the gap can be made inconspicuous by sandwiching the overhanging portion 434c of the buffer member 434 having flexibility. Moreover, when attaching / detaching the water discharge head 406 to / from the faucet body 512, the possibility of damaging the faucet body 512 by the water discharge head 406 can be reduced.

In the faucet 500, the buffer member 434 is provided at the upstream end of the inner tube 428 as a part of the inner tube 428. The buffer member 434 has a shape that covers the end surface of the outer shell 426. The buffer member 434 may be formed integrally with the inner tube 428. The buffer member 434 may be formed separately and coupled to the inner tube 428 by means such as adhesion. The outer shell 426 of the water discharge head 406 is opposed to the faucet body 512 through the buffer member 434.

The buffer member 434 may be a member having a higher elastic modulus than the outer shell 426. The contact width T of the contact surface 436 of the buffer member 434 is at least larger than the thickness of the outer shell 426. The contact surface 436 of the buffer member 434 is processed into a curved surface shape corresponding to the curved surface shape of the faucet body portion 512. For this reason, the water discharge head 406 and the faucet body 512 can be connected with a smooth appearance without a gap. The contact surface 436 of the buffer member 434 may have a curved surface shape that matches the curved surface shape of the side surface of the faucet body 512.

Furthermore, since the water discharge head 406 and the faucet main body part 512 are connected via the elastic buffer member 434, the gap between the water discharge head 406 and the water faucet main body part 512 can be further reduced. Further, since the contact surface 436 is enlarged by increasing the contact width T, the pressure accompanying the connection is easily dispersed, and the faucet main body 512 is hardly damaged by the connection of the water discharge head 406.

Next, the shape of the edge of the buffer member 434 will be described. 44A and 44B are schematic views of the edge shape of the buffer member 434. FIG. FIG. 44A shows the water discharge head 406 in the middle of attachment, and the abutment surface 436 is in contact with the faucet body 512, but the protruding tube part 320 is completely accommodated in the accommodation part 310 of the water discharge head 406. Indicates a state that has not been done. FIG. 44 (b) shows a state in which the contact surface 436 is in contact with and pressed against the faucet body 512 in the water discharge head 406 after being mounted. From the viewpoint of improving the appearance, it is preferable that the portion of the buffer member 434 that protrudes from the gap between the faucet body 512 and the water discharge head 406 is small. Therefore, in the faucet 500, the buffer member 434 is provided with a curved edge portion 434a that is an outer edge curved. In particular, the cross-section of the curved edge portion 434a is rolled outward and has a rounded shape, and the tip end portion 434d faces the outer peripheral surface of the cylindrical portion 434b. By providing the curved edge portion 434a between the faucet body portion 512 and the water discharge head 406, the stretchability at this portion is increased, and the faucet body portion 512 and the water discharge head 406 can be closely adhered to each other without any gap. In particular, by connecting the curled portion of the curved edge portion 434a while entraining it, the gap between the water discharge head 406 and the faucet main body portion 512 is filled, and the portion that protrudes to the outside can be reduced and the appearance is improved. As shown in FIG. 44 (b), the tip portion 434d is closer to the outer peripheral surface of the cylindrical portion 434b in the state after the mounting than in the state before the mounting. The curved edge portion 434a may be formed in an annular shape at the end portion of the buffer member 434, or may be formed by cutting out a part thereof. The curved edge 434a may be formed in a tubular shape in cross section.

The faucet 500 configured as described above has the same characteristics as the faucet 400 by having the same configuration as the faucet 400. In addition, since the faucet 500 is provided with a buffer member 434 between the faucet body portion 512 and the water discharge head 406, the buffer member 434 is sandwiched between the faucet body portion 412 and the water discharge head 406. , The gap becomes inconspicuous and the aesthetics improve. Further, since the buffer member 434 has the curved edge portion 434a, the curved edge portion 434a is sandwiched between the outer shell 426 and the faucet main body portion 412 and is closely adhered to both sides by the repulsive force, thereby making the gap less noticeable.

The description has been given above based on the fourth and fifth embodiments of the present invention. Those skilled in the art will understand that these embodiments are examples, and that various modifications and changes are possible within the scope of the claims of the present invention, and that such modifications and changes are also within the scope of the claims of the present invention. It is where it is done. Accordingly, the description and drawings herein are to be regarded as illustrative rather than restrictive.

In the description of the faucet 400 according to the fourth embodiment, the example in which the water discharge head 406 is attached to the faucet body 412 in a state in which the protruding pipe part 320 is accommodated up to the root part of the protruding pipe part 320 has been described. Not limited to this. You may comprise so that a water discharging head may be mounted | worn with the faucet main-body part 412 in the state which accommodated a part of protrusion pipe | tube part.

In the description of the faucet 400 of the fourth embodiment, an example in which the water discharge head 406 is provided with the accommodating portion 310 and the faucet main body portion 412 is provided with the protruding pipe portion 320 has been described, but is not limited thereto. You may comprise so that a protrusion pipe part may be provided in a water discharge head and the said protrusion pipe part may be accommodated in a faucet main-body part.

In the drawings used for the description, in order to clarify the relationship between the members, the cross sections of some of the members are hatched, but the hatching does not limit the materials and materials of these members.

DESCRIPTION OF SYMBOLS 100 Water tap, 102 Water discharging handle, 104 Rotating part, 106 Water discharging head, 108 Support | pillar part, 110 Water flow pipe, 112 Water faucet main-body part, 118 Joint pipe, 120 Fastener, 122 Plug, 126 Outer shell, 128 Inner pipe , 130 water outlet member, 132 rectifying member, 134 buffer member, 136 contact surface, 138 rotating portion, 140 water discharging head, 142 joint pipe, 146 branching portion, 148 water discharging head, 156 cartridge holding portion, 158 water purification cartridge, 160 water discharging Member, 162 water purification handle, 164 outer shell, 168 valve, 170 inner pipe, 172 cylindrical member.
200 faucet, 202 spout handle, 204 rotating part, 205 boundary surface, 206 spout head, 208 strut part, 210 water pipe, 212 faucet body part, 214 strut cap, 216 operation projection, 218 joint pipe, 220 fastener, 222 outlet, 224 water inlet, 226 outer shell, 228 inner pipe, 230 water outlet member, 232 rectifying member, 234 buffer member, 238 rotating part, 240 water outlet head, 242 joint pipe, 244 boundary surface, 246 branching part, 248 Water discharge head, 250 2nd O-ring, 252 1st O-ring, 254 3rd O-ring, 255 4th O-ring, 256 Cartridge holder, 258 Water purification cartridge, 260 Water discharge member, 262 Water purification handle, 264 Outer shell, 266 5th O-ring, 268 valve, 270 inner pipe, 272 cylindrical member 274 outer diameter enlarged portion, 276 tip 278 notched, 280 water discharge head end surface, 282 projection, 284 holding portion, in 286 accommodating portion 288 larger housing portion.
310 accommodating portion, 320 protruding tube portion, 350 check valve, 351 valve member, 352 valve seat member, 360 biasing mechanism, 364 sliding member, 366 elastic body, 370 biasing mechanism mounting portion, 382 connecting joint, 400 water Stopper, 404 rotating part, 406 water discharge head, 408 strut part, 410 water pipe, 410a water pipe, 410b water pipe, 412 faucet body part, 414 strut cap, 418 joint pipe, 420 stopper, 422 insertion port, 424 Water inlet, 426 outer shell, 428 inner pipe, 434 buffer member, 434a curved edge, 436 abutting surface, 448 water discharge head, 456 cartridge holding part, 458 water purification cartridge, 464 outer shell, 470 inner pipe, 472 cylindrical member 474 outer diameter enlarged portion, 480 water discharge head end surface, 484 water passage portion, 486 first housing portion, 488 first Accommodating portion 490 engaging groove 500 taps, 508 struts, 512 faucet main body, 550 a check valve, 550a check valve, 550b check valve.

The present invention relates to a faucet.

Claims

A faucet body part, and a water discharge head detachably attached to the faucet body part,
The faucet body is
A strut portion having a water flow portion;
A joint pipe projecting in the radial direction of the support column,
The faucet according to claim 1, wherein the water discharge head is attached to the faucet body in a state in which the joint pipe is accommodated.
The faucet according to claim 1, wherein the faucet body portion further includes a rotating portion rotatably attached to the support column portion, and the joint pipe is provided in the rotating portion.
The faucet according to claim 2, wherein when the water discharge head is attached to the faucet body, an end portion of the water discharge head comes into contact with an outer peripheral surface of the rotating portion.
The outer peripheral surface of the rotating part has a curved surface shape,
4. The faucet according to claim 2, wherein a shape of a surface of the water discharge head facing the rotating portion coincides with the curved surface shape of the rotating portion.
5. The faucet according to claim 3, wherein an end portion of the water discharge head is covered with a buffer member, and the water discharge head is in contact with an outer peripheral surface of the rotating portion via the buffer member.
The said water discharge head has a structure where the inner pipe which forms a water flow path is inserted in an outer shell, and the said inner pipe accommodates the said joint pipe | tube, It is any one of Claim 1 to 5 characterized by the above-mentioned. Water faucet.
A water discharge head that is detachably attached to a faucet body, and is connected to the faucet body so as to accommodate a joint pipe protruding from the faucet body.
Connected to a faucet body having a strut having a water flow portion and a rotating portion rotatably attached to the strut and having a joint pipe projecting in the radial direction;
The end accommodates the joint pipe,
The water discharge head according to claim 7, wherein the joint pipe is fixed to the faucet body by gripping the joint pipe with a fastener inserted from an insertion port extending in a circumferential direction in the outer shell.
Connected to a faucet body having a strut having a water flow portion and a rotating portion rotatably attached to the strut and having a joint pipe projecting in the radial direction;
The inner pipe forming the water passage is inserted into the outer shell,
The water discharge head according to claim 7, wherein the inner pipe is connected to the faucet body by accommodating the joint pipe.
The water discharge head according to claim 8 or 9, wherein an end portion of the water discharge head facing the rotating portion is covered with a buffer member.
For a faucet body having a strut having a water flow portion, and a rotating portion having a joint pipe that is rotatably attached to the strut and protrudes in the radial direction,
Inserting the joint pipe into the water discharge head such that the end of the water discharge head faces the outer peripheral surface of the rotating portion;
Inserting a fastener from an outlet extending in the circumferential direction in the outer shell of the water discharge head, and gripping the joint pipe by the fastener;
A faucet assembling method comprising:
The faucet according to claim 1, wherein the water discharge head is attached to the faucet body in a state in which the joint pipe is accommodated up to a base portion of the joint pipe.
The outer diameter of the joint pipe is enlarged at the root portion,
The faucet according to claim 12, wherein the water discharge head is attached to the faucet body in a state in which at least a part of the outer diameter enlarged portion of the joint pipe is accommodated.
The 1st and 2nd rotation control part which controls the rotation of the circumferential direction of the said water discharge head is formed in the outer surface of the said joint pipe, and the inner surface of the said water discharge head, The Claim 12 or 13 characterized by the above-mentioned. The faucet described in 1.
The faucet according to claim 14, wherein both or one of the first and second rotation restricting portions is formed of a resin.
Removably connected to the faucet body having a joint pipe projecting from the side of the body,
The water discharge head according to claim 7, wherein the water spout head is attached to the faucet body in a state in which the joint pipe is accommodated up to a root portion of the joint pipe.
A tapered surface is formed on the outer surface of the joint pipe,
The faucet according to claim 1, wherein the water discharge head is attached to the faucet main body portion with an end portion thereof facing a tapered surface of the joint pipe.
The faucet according to claim 17, wherein a tapered surface is also formed at an end of the water discharge head.
19. The water discharge head is attached to the faucet main body part with the tapered surface of the water discharge head and the tapered surface of the joint pipe being in contact with each other partly or entirely. Water faucet.
The faucet according to any one of claims 17 to 19, wherein the water discharge head is attached to the faucet body in a state in which the joint pipe is accommodated up to a root portion of the joint pipe.
Inside the water discharge head, a first accommodating portion having a first inner diameter is formed on the end side, and a second accommodating portion having a second inner diameter smaller than the first inner diameter is formed on the back side. The faucet according to any one of claims 17 to 20, wherein
Removably connected to the faucet body having a joint pipe projecting from the side of the body,
A first tapered surface is formed at the end,
A second tapered surface is formed on the outer surface of the joint pipe,
The water discharge head according to claim 7, wherein the water discharge head is attached to the faucet body in a state where the first taper surface is opposed to the second taper surface.
Removably connected to the faucet body having a joint pipe projecting from the side of the body,
An inner pipe that accommodates the joint pipe has a double pipe structure inserted into an outer shell;
The water discharge head according to claim 7, wherein the inner pipe extends from a water discharge port to an end of the outer shell.
24. The water discharge head according to claim 23, wherein the outer shell is subjected to resin plating.
The outer diameter of the joint pipe is enlarged at the root portion,
25. The water discharge head according to claim 23 or 24, wherein at least a part of the outer diameter enlarged portion of the joint pipe is attached to the faucet body in a state in which the inner pipe is accommodated.
The water discharge head has a double pipe structure in which an inner pipe that accommodates the joint pipe is inserted into an outer shell,
The faucet according to claim 1, wherein the inner pipe extends from a water outlet to an end of the outer shell.
The faucet according to claim 1, wherein the faucet body is configured to be exchangeable from a water discharge head having no water purification function to another water discharge head having a water purification function.
The faucet according to claim 27, wherein a check valve is provided in the faucet body or upstream of the faucet body.
Having a water conduit for introducing water into the faucet body,
The faucet according to claim 28, wherein the check valve includes a check valve provided in the water pipe.