Patent Publication Number: US-9903030-B2

Title: Hydrogen-containing water generating electrode and hydrogen-containing water generating device

Description:
FIELD 
     The present invention relates to a technology to obtain water containing hydrogen from raw water such as tap water. 
     BACKGROUND 
     As a technology to generate water containing hydrogen (hydrogen-containing water) from tap water, technologies are described, in which an ion-exchange membrane is provided between a pair of electrodes of a positive electrode and a negative electrode in an electrolytic bath, and hydrogen-containing electrolyzed water is obtained by electrolysis (for example, Patent Literatures 1 to 3). 
     CITATION LIST 
     Patent Literature 
     Patent Literature 1: Japanese Patent Application Laid-Open Publication No. 2010-88972 
     Patent Literature 2: Japanese Patent Application Laid-Open Publication No. 2010-88973 
     Patent Literature 3: Japanese Patent Application Laid-Open Publication No. 2010-284504 
     SUMMARY 
     Technical Problem 
     The technologies described in Patent Literatures 1 to 3 are provided with the positive electrode and the negative electrode in the electrolytic bath, and supply raw water to the electrolytic bath to generate hydrogen-containing water. In the technologies described in Patent Literatures 1 to 3, the electrolytic bath is used by being installed in a bath or a tank for storing drinking water. In recent years, a movable portable device that can be brought into a place where the device is used, that is, where the hydrogen-containing water is generated, and generate the hydrogen-containing water is desired in consideration of convenience, instead of the installation type such as the ones described in Patent Literatures 1 to 3. The portable device may be supplied power by a battery or the like, for example, in a case where a commercial power source is not available. Therefore, the portable device is required to cause the raw water to efficiently contain hydrogen. 
     According to one aspect, an objective of the present invention is to improve efficiency to dissolve hydrogen in the raw water in generating hydrogen-containing water. 
     Solution to Problem 
     According to an aspect of the present invention, a hydrogen-containing water generating electrode includes: a positive electrode that is a tubular conductor and includes a plurality of openings in a side portion; an insulator that is provided on an outer peripheral portion of the positive electrode and is in contact with the positive electrode; and a negative electrode that is provided on an outer peripheral portion of the insulator, is a tubular conductor in contact with the insulator, and includes a plurality of openings in a side portion. 
     According to another aspect of the present invention, the insulator preferably includes a plurality of openings. 
     According to another aspect of the present invention, the positive electrode and the negative electrode preferably include an end-portion-side opening portion as an opening portion in at least one of end portions. 
     According to another aspect of the present invention, a size of a gap between the positive electrode and the negative electrode is preferably from 0.1 to 1 mm, both inclusive. 
     According to another aspect of the present invention, a size of a gap between the positive electrode and the negative electrode is preferably equal to a thickness of the insulator. 
     According to another aspect of the present invention, the at least a part of the positive electrode and at least a part of the negative electrode preferably have a curved surface. 
     According to another aspect of the present invention, the positive electrode, the insulator, and the negative electrode preferably have a cylindrical shape. 
     According to another aspect of the present invention, a hydrogen-containing water generating device includes the hydrogen-containing water generating electrode. 
     Advantageous Effects of Invention 
     According to one aspect of the present invention, it is possible to improve efficiency to dissolve hydrogen in raw water in generating hydrogen-containing water. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view illustrating a hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 2  is a perspective view illustrating the hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 3  is a diagram illustrating a use state of a hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 4  is a side view illustrating the hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 5  is a diagram illustrating a cross section of the hydrogen-containing water generating electrode according to the present embodiment taken along a plane including a central axis of the electrode. 
         FIG. 6  is an A-A cross-sectional view of  FIG. 4 . 
         FIG. 7  is a partially enlarged diagram of  FIG. 6 . 
         FIG. 8  is a side view illustrating a modification of the hydrogen-containing water generating electrode. 
         FIG. 9  is a side view illustrating a modification of the hydrogen-containing water generating electrode. 
         FIG. 10  is a cross-sectional view illustrating a modification of the hydrogen-containing water generating electrode. 
         FIG. 11  is a cross-sectional view illustrating a modification of the hydrogen-containing water generating electrode. 
         FIG. 12  is a diagram illustrating a partially enlarged positive electrode and a partially enlarged negative electrode. 
         FIG. 13  is an enlarged diagram of an opening included in the positive electrode and the negative electrode. 
         FIG. 14  is a B-B cross-sectional view of  FIG. 12 . 
         FIG. 15  is a diagram illustrating a partially enlarged insulator. 
         FIG. 16  is a flowchart of a method of manufacturing the hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 17  is a diagram illustrating a step of the method of manufacturing the hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 18  is a diagram illustrating a step of the method of manufacturing the hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 19  is a diagram illustrating a step of the method of manufacturing the hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 20  is a diagram illustrating a step of the method of manufacturing the hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 21  is a diagram illustrating a step of the method of manufacturing the hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 22  is a diagram illustrating a step of the method of manufacturing the hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 23  is a diagram illustrating a step of the method of manufacturing the hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 24  is a diagram illustrating a step of the method of manufacturing the hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 25  is a diagram illustrating a step of the method of manufacturing the hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 26  is a diagram illustrating a step of the method of manufacturing the hydrogen-containing water generating electrode according to the present embodiment. 
         FIG. 27  is a diagram illustrating a hydrogen-containing water generating device according to the present embodiment. 
         FIG. 28  is a diagram illustrating a first support included in the hydrogen-containing water generating device according to the present embodiment. 
         FIG. 29  is a diagram illustrating a second support included in the hydrogen-containing water generating device according to the present embodiment. 
         FIG. 30  is a diagram illustrating an opening of a protection member and an opening of a negative electrode included in the hydrogen-containing water generating device according to the present embodiment. 
         FIG. 31  is a diagram illustrating another use state of the hydrogen-containing water generating device according to the present embodiment. 
         FIG. 32  is a diagram illustrating a mounting structure of when the hydrogen-containing water generating electrode is mounted to the hydrogen-containing water generating device according to the present embodiment. 
         FIG. 33  is a diagram illustrating a mounting structure of when the hydrogen-containing water generating electrode is mounted to the hydrogen-containing water generating device according to the present embodiment. 
         FIG. 34  is a diagram illustrating another mounting structure of when a hydrogen-containing water generating electrode is mounted to the hydrogen-containing water generating device according to the present embodiment. 
         FIG. 35  is a diagram illustrating a modification of the hydrogen-containing water generating device according to the present embodiment. 
         FIG. 36  is a diagram illustrating the modification of the hydrogen-containing water generating device according to the present embodiment. 
         FIG. 37  is a diagram illustrating the modification of the hydrogen-containing water generating device according to the present embodiment. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Embodiments for implementing the present invention will be described in detail with reference to the drawings. First, electrodes used for generating hydrogen-containing water will be described. 
     &lt;Hydrogen-Containing Water Generating Electrode&gt; 
       FIGS. 1 and 2  are perspective views illustrating a hydrogen-containing water generating electrode according to the present embodiment. A hydrogen-containing water generating electrode  10  generates hydrogen-containing water that is water containing hydrogen, from raw water such as tap water, using an electrolysis action of water. The hydrogen-containing water is alkaline water. As illustrated in  FIGS. 1 and 2 , the hydrogen-containing water generating electrode  10  includes a positive electrode  11 , a negative electrode  12 , and an insulator  13 . The positive electrode  11  and the negative electrode  12  are a tubular conductor. In the present embodiment, shapes of the positive electrode  11  and the negative electrode  12  are, but not limited to, a cylindrical shape. The insulator  13  is provided on an outer peripheral portion of the positive electrode  11 , and is in contact with the positive electrode  11 . The negative electrode  12  is provided on an outer peripheral portion of the insulator  13 , and is in contact with the insulator  13 . That is, the insulator  13  is provided between the positive electrode  11  and the negative electrode  12  provided outside the positive electrode  11 , and is in contact with the positive electrode  11  and the negative electrode  12 . The positive electrode  11 , the negative electrode  12 , and the insulator  13  are a net-like member. In the present embodiment, the insulator  13  is in contact with the positive electrode  11  and the negative electrode  12 . However, the insulator  13  may not necessarily contact with the positive electrode  11  and the negative electrode  12 . 
     A positive-electrode power feed member  14  that is a rod-like conductor is electrically connected with the positive electrode  11 . A negative-electrode power feed member  15  that is a rod-like conductor is electrically connected with the negative electrode  12 . The positive-electrode power feed member  14  is electrically connected with a positive electrode of a power source (direct-current power source)  20 . The negative-electrode power feed member  15  is electrically connected with a negative electrode of the power source  20 . With such a structure, the positive electrode  11  is electrically connected with the positive electrode of the power source  20  through the positive-electrode power feed member  14 , and the negative electrode  12  is electrically connected with the negative electrode of the power source  20  through the negative-electrode power feed member  15 . 
     In the present embodiment, a positive-electrode support member  18  that is a rod-like member is mounted to the positive electrode  11 . The positive-electrode support member  18  is mounted to the positive electrode  11  at a side opposite to the side where the positive-electrode power feed member  14  is mounted. A negative-electrode support member  19  that is a rod-like member is mounted to the negative electrode  12 . The negative-electrode support member  19  is mounted to the negative electrode  12  at a side opposite to the side where the negative-electrode power feed member  15  is mounted. In the present embodiment, all of the positive-electrode support member  18 , the negative-electrode support member  19 , the positive-electrode power feed member  14 , and the negative-electrode power feed member  15  are, but not limited to, of the same material. For example, the positive-electrode power feed member  14  and the negative-electrode power feed member  15  may be the same material, and the positive-electrode support member  18  and the negative-electrode support member  19  may be a different material from the material of the positive-electrode power feed member  14  and the negative-electrode power feed member  15 . In the present embodiment, the positive electrode  11  and the negative electrode  12  may not necessarily be provided with the positive-electrode support member  18  and the negative-electrode support member  19 . 
     As illustrated in  FIGS. 1 and 2 , the hydrogen-containing water generating electrode  10 , to be specific, the positive electrode  11  and the negative electrode  12  include end-portion-side opening portions  10 HA and  10 HB as opening portions at both end portions. The hydrogen-containing water generating electrode  10  may not include the end-portion-side opening portions  10 HA and  10 HB, or may include the end-portion-side opening portion  10 HA or the end-portion-side opening portion  10 HB at least at one end portion. 
     The positive electrode  11  includes a slit  11 SL extending in a longitudinal direction, that is, in a direction in which the positive electrode  11  as a tubular member extends. The negative electrode  12  includes a slit  12 SL extending in the longitudinal direction, that is, in a direction in which the negative electrode  12  as a tubular member extends. As illustrated in  FIGS. 1 and 2 , the hydrogen-containing water generating electrode  10  includes restraining members  40  between the negative-electrode power feed member  15  and the negative-electrode support member  19 , and on outside portions of the negative electrode  12 . The restraining members  40  closes the slit  11 SL of the positive electrode  11  and the slit  12 SL of the negative electrode  12  to restrain the negative electrode  12 , the insulator  13 , and the positive electrode  11  from a circumferential direction of the negative electrode  12  and the positive electrode  11 . Next, a use state of the hydrogen-containing water generating electrode  10  will be described. 
       FIG. 3  is a diagram illustrating a use state of the hydrogen-containing water generating electrode according to the present embodiment. The hydrogen-containing water generating electrode  10  is put in raw water W, and generates hydrogen-containing water in the raw water W. The hydrogen-containing water generating electrode  10  is not an installation type, and is applicable to a portable device that can be brought into a place where the device is used, that is, where the hydrogen-containing water is generated, and be put in the raw water W and generate the hydrogen-containing water. The raw water W is, for example, warm water stored in a bath, drinking water stored in a drinking water tank, rinse water stored in a rinse water tank, or the like. When a predetermined voltage (direct-current voltage) is applied from the power source  20  to between the positive electrode  11  and the negative electrode  12  of the hydrogen-containing water generating electrode  10  put in the raw water W, the raw water W existing around the hydrogen-containing water generating electrode  10  is ionized into hydrogen ions H +  and hydroxyl ions OH − . 
     When the insulator  13  does not have an ion exchange function, the ionized hydrogen ions H +  pass through the insulator  13  and are gathered to the negative electrode  12  side, and bubbles of a hydrogen gas (H 2 ) are generated at the negative electrode  12 . These bubbles are minute bubbles with a diameter in the nanometer order. The raw water W (2H 2 O) is split to form H 2 +2OH −  with an electron (2e − ). The hydrogen gas is dissolved in the raw water W by the water-forming function. Therefore, the hydrogen-containing water in which hydrogen is dissolved in the raw water W is generated. The ionized hydroxyl ions OH −  pass through the insulator  13  and are gathered to the positive electrode  11  side, and the raw water W (2H 2 O) is split to form O 2 +4H + +4e − , and acid ion water is generated. O 2  is gathered to an inside of the tubular positive electrode  11  as bubbles, are moved along the inside of the positive electrode  11 , and are released from the end-portion-side opening portions  10 HA and  10 HB to an outside of the positive electrode  11 . Next, the hydrogen-containing water generating electrode  10  will be described in more detail. 
       FIG. 4  is a side view of the hydrogen-containing water generating electrode according to the present embodiment.  FIG. 4  illustrates a state in which a part of the negative electrode  12  and the insulator  13  of the hydrogen-containing water generating electrode  10  is removed.  FIG. 5  is a diagram illustrating a cross section of the hydrogen-containing water generating electrode according to the present embodiment taken along a plane including a central axis of the electrode.  FIG. 6  is an A-A cross-sectional view of  FIG. 4 .  FIG. 7  is a partially enlarged diagram of  FIG. 6 . A direction parallel to a direction (hereinafter, appropriately referred to as longitudinal direction) E in which the tubular positive electrode  11  and negative electrode  12  having a cylindrical shape in the present embodiment extend is a central axis Zt of these electrodes. The central axis Zt is an axis passing through a center (gravity center) in cross sections of the positive electrode  11  and the negative electrode  12 , the cross sections being perpendicular to the central axis Zt. 
     As illustrated in  FIG. 4 , the positive electrode  11  includes a plurality of openings  11 H in a side portion, and the negative electrode  12  includes a plurality of openings  12 H in a side portion. The plurality of openings  11 H included in the positive electrode  11  penetrates the side portion of the positive electrode  11  in a thickness direction of the positive electrode  11 . The plurality of openings  12 H included in the negative electrode  12  penetrates the side portion of the negative electrode  12  in a thickness direction of the negative electrode  12 . In the present embodiment, the positive electrode  11  and the negative electrode  12  are manufactured with a conductor. In the present embodiment, the positive electrode  11  and the negative electrode  12  are titanium (Ti) plated with platinum (Pt). The plating may be, for example, platinum (Pt)-iridium (Ir) plating. In the present embodiment, titanium is pure titanium. The positive electrode  11  and the negative electrode  12  are not limited to the titanium plated with platinum. However, it is favorable to employ a material (vanadium (V), for example), that is not dissolved in the raw water W. In the present embodiment, both of the positive electrode  11  and the negative electrode  12  are plated. However, only the positive electrode  11 , on which calcium hydroxide, magnesium hydroxide, or the like in the raw water is deposited, is plated, and the negative electrode  12  may not be plated. In this way, the manufacturing cost of the hydrogen-containing water generating electrode  10  can be decreased. 
     As illustrated in  FIG. 5 , the insulator  13  lying between an outer side portion (outside portion)  11 So of the positive electrode  11 , and an inner side portion (inside portion)  12 Si of the negative electrode  12  is in contact with the outside portion  11 So of the positive electrode  11  and the inside portion  12 Si of the negative electrode  12 . The insulator  13  includes a plurality of openings  13 H. The openings  13 H penetrate the insulator  13  in a thickness direction of the insulator  13 . As the insulator  13 , a net woven with fiber of a material having insulation properties (a resin, for example) can be used. Further, the insulator  13  may have an ion exchange function. For example, the insulator  13  may be an ion-exchange membrane (positive ion-exchange membrane). In this case, the insulator  13  may not include the openings  13 H. 
     The positive ion-exchange membrane is negatively charged due to an anionic group fixed to the membrane. Therefore, the negative ion is repelled and cannot pass through, and only the positive ion can pass through. Therefore, in the hydrogen-containing water generating electrode  10 , the insulator  13  using the positive ion-exchange membrane transmits only the positive ion, that is, the hydrogen ion H + , and repels the negative ion, that is, the ionized hydroxyl ion OH − . Therefore, the amount of the hydroxyl ion OH −  that passes through the insulator  13  and is moved to the positive electrode  11  side can be decreased. As a result, generation of oxygen and the acid ion water can be suppressed at the positive electrode  11  side. 
     As described above, while the ion-exchange membrane may be used, an electrically neutral material is used as the insulator  13 . In doing so, the manufacturing cost of the insulator can be decreased, and processing becomes easy. Further, the ion-exchange membrane has a hole that transmits the ions but does not transmit water molecules. If the ion-exchange membrane is used as the insulator  13 , the hydrogen-containing water generating electrode  10  provided with the insulator  13  requires a high voltage in generating the hydrogen-containing water, and the power consumption may become large. In the present embodiment, the insulator  13  is an electrically neutral net-like member. Therefore, the hydrogen-containing water can be generated at a lower voltage than the case of the ion-exchange membrane, and the power consumption can be suppressed. 
     When a net woven with fiber having insulation properties is used as the insulator  13 , the thickness of the insulator  13  is about 0.1 to 1 mm. As illustrated in  FIG. 6 , in the present embodiment, an end portion  13 T of the insulator  13  provided between the outside portion (corresponding to an outer peripheral portion)  11 So of the positive electrode  11  and the inside portion (corresponding to an inner peripheral portion)  12 Si of the positive electrode  12  is taken out through the slit  12 SL of the negative electrode  12  to an outside portion (corresponding to an outer peripheral portion)  12 So side of the negative electrode  12 . The end portion  13 T of the insulator  13  may be taken out through the slit  11 SL of the positive electrode  11  to an inside portion (corresponding to an inner peripheral portion)  11 Si side of the positive electrode  11 . Next, influence of a size t of a gap (appropriately, referred to as interelectrode gap) formed between the positive electrode  11  and the negative electrode  12  illustrated in  FIG. 7  will be described. The size t of the interelectrode gap is a distance between the outside portion (outer peripheral portion)  11 So of the positive electrode  11 , and the inside portion (inner peripheral portion)  12 Si of the negative electrode  12 . 
     Amounts of dissolved hydrogen of the hydrogen-containing water are compared when the size t of the interelectrode gap illustrated in  FIG. 7  is changed. In this evaluation, t=0.4 mm and 3 mm. When t=0.4 mm, the voltage applied to the hydrogen-containing water generating electrode  10  is 18 V, and the current is 5 A. When t=3 mm, the voltage applied to the hydrogen-containing water generating electrode  10  is 60 V, and the current is 5 A. Results are illustrated in Table 1. The dissolved hydrogen in Table 1 is a measured value of when 15 minutes has passed from when the hydrogen-containing water generating electrode  10  is put in hot water of 120 liters, 41° C., and the voltage is applied to the positive electrode  11  and the negative electrode  12 . 
     
       
         
           
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                   
                 Size of 
                 Size of 
                 Ratio (where 
               
               
                   
                 interelectrode 
                 interelectrode 
                 t = 3.0 mm is 
               
               
                 Item 
                 gap (t) 0.4 mm 
                 gap (t) 3.0 mm 
                 100) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
            
               
                 Electrolytic 
                 18 
                 60 
                 30 
               
               
                 voltage (DCV) 
               
               
                 Electrolytic 
                 5 
                 5 
                 — 
               
               
                 current (DCA) 
               
               
                 Power 
                 90 
                 300 
                 30 
               
               
                 consumption 
               
               
                 (DCW) 
               
               
                 Dissolved 
                 0.4 
                 0.37 
                 108 
               
               
                 hydrogen (ppm) 
               
               
                 Average value 
               
               
                 of n = 3 
               
               
                   
               
            
           
         
       
     
     It can be seen that, from the evaluation results illustrated in Table 1, the amount of hydrogen (dissolved hydrogen amount) dissolved in the raw water becomes larger as the size t of the interelectrode gap becomes smaller. To be specific, when the size t of the interelectrode gap is 0.4 mm, the dissolved hydrogen amount is increased by 8%, compared with a case of t=3.0 mm. When the size t of the interelectrode gap is 0.4 mm, the power consumption is slightly more than ⅓, compared with the case of t=3.0 mm. When the size t of the interelectrode gap is 0.4 mm, a larger amount of hydrogen can be dissolved in the raw water with smaller power consumption, compared with the case of t=3.0 mm. That is, efficiency to dissolve hydrogen in the raw water of the hydrogen-containing water generating electrode  10  can be improved by making the size t of the interelectrode gap small. 
     In the present embodiment, it is favorable to cause the size t of the interelectrode gap to be from 0.1 to 1 mm, both inclusive. By causing the size t of the interelectrode gap to fall within the above-described range, the hydrogen-containing water generating electrode  10  can generate a sufficient amount of hydrogen even if a potential difference between the voltages applied to the positive electrode  11  and to the negative electrode  12  is relatively small, in generating the hydrogen-containing water. If the size t of the interelectrode gap falls within the above-described range, the hydrogen-containing water generating electrode  10  can cause a sufficient amount of hydrogen to be dissolved in the raw water, and can generate the hydrogen-containing water in which a large amount of hydrogen is dissolved, even if the voltage applied to the hydrogen-containing water generating electrode  10  is relatively small. Therefore, for example, the hydrogen-containing water generating electrode  10  can be used for a case in which the hydrogen-containing water generating electrode  10  is put in warm water stored in a bath to generate the hydrogen-containing water. Further, if the amount of hydrogen dissolved in the hydrogen-containing  3  water is the same, the hydrogen-containing water generating electrode  10  can suppress the power consumption. 
     To dissolve a sufficient amount of hydrogen in the raw water when the size t of the interelectrode gap is large, the voltage to be applied to the hydrogen-containing water generating electrode  10  is made large. By causing the size t of the interelectrode gap to be 1 mm or less, preferably, 0.6 mm or less, a sufficient amount of hydrogen can be dissolved in the raw water, even if the voltage to be applied to the hydrogen-containing water generating electrode  10  is about 48 V, for example. By causing the size t of the interelectrode gap to be 0.1 mm or more, preferably, 0.2 mm or more, insulation between the positive electrode  11  and the negative electrode  12  by the insulator  13  lying between the positive electrode  11  and the negative electrode  12  can be sufficiently secured. As a result, the hydrogen-containing water generating electrode  10  can stably exhibit performance. Further, as described above, when a resin is used as the insulator  13 , by causing the size t of the interelectrode gap to be 0.1 mm or more, preferably, 0.2 mm or more, a decrease in durability of the insulator  13  can be suppressed. In the present embodiment, the insulator  13  lying between the positive electrode  11  and the negative electrode  12  is in contact with both of the positive electrode  11  and the negative electrode  12 . Therefore, the size t of the interelectrode gap is determined according to the thickness of the insulator  13 . 
     In the present embodiment, the hydrogen-containing water generating electrode  10  is directly put in a bath or a drinking water tank, and generates the hydrogen-containing water. Then, when generation of the hydrogen-containing water is not necessary, the hydrogen-containing water generating electrode  10  is taken out of the bath or the drinking water tank. As described above, the hydrogen-containing water generating electrode  10  is not used by being installed to a mounting object, and can be moved or carried. Therefore, the hydrogen-containing water generating electrode  10  is subject to influence of vibration and impact, compared with one installed and used. When the insulator  13  is brought to lie between the positive electrode  11  and the negative electrode  12  and to come in contact with the positive electrode  11  and the negative electrode  12 , movement of the positive electrode  11  and the negative electrode  12  of the hydrogen-containing water generating electrode  10  is controlled. As a result, resistance of the hydrogen-containing water generating electrode  10  to the vibration and impact is improved. 
     Further, when the insulator  13  is brought to lie between the positive electrode  11  and the negative electrode  12  and to come in contact with the positive electrode  11  and the negative electrode  12 , the space between the positive electrode  11  and the negative electrode  12  can be easily made constant with the insulator  13  throughout the entire hydrogen-containing water generating electrode  10 . As a result, in the hydrogen-containing water generating electrode  10 , variation of electrical resistance between the positive electrode  11  and the negative electrode  12  is suppressed, and variation of current density is suppressed. Therefore, the hydrogen bubbles can be uniformly generated from the entire electrode. By causing the size t of the interelectrode gap to be equal to the thickness of the insulator  13 , the insulator  13  can be easily brought to come in contact with both of the positive electrode  11  and the negative electrode  12 . Therefore, it is favorable. Next, the positive-electrode power feed member  14  and the negative-electrode power feed member  15  will be described. 
     As illustrated in  FIG. 4 , the positive-electrode power feed member  14  is a rod-like conductor extending from a first end portion (one end portion)  11 T 1  of the positive electrode  11  to a second end portion (the other end portion)  11 T 2 . As illustrated in  FIGS. 5 and 6 , a portion of the positive-electrode power feed member  14 , the portion being shorter than half L/2 of a dimension L of the positive electrode  11  in the direction (longitudinal direction) E in which the positive electrode  11  extends, is mounted to the inside portion  11 Si of the positive electrode  11 . The negative-electrode power feed member  15  is a rod-like conductor extending from a first end portion  12 T 1  of the negative electrode  12  to a second end portion  12 T 2 . As illustrated in  FIGS. 5 and 6 , a portion of the negative-electrode power feed member  15 , the portion being shorter than half L/2 of a dimension L of the negative electrode  12  in the direction (longitudinal direction) E in which the negative electrode  12  extends, is mounted to the outside portion  12 So of the negative electrode  12 . Both of the length of the portion of the positive-electrode power feed member  14  mounted to the positive electrode  11 , and the length of the portion of the negative-electrode power feed member  15  mounted to the negative electrode  12  are LS. In the present embodiment, LS&lt;L/2 is satisfied. 
     As illustrated in  FIG. 4 , the positive-electrode support member  18  is a rod-like conductor extending from the second end portion  11 T 2  of the positive electrode  11  to the first end portion  11 T 1 . As illustrated in  FIG. 5 , a portion of the positive-electrode support member  18 , the portion being shorter than the half L/2 of the dimension L of the positive electrode  11  in the longitudinal direction E of the positive electrode  11 , is mounted to the inside portion  11 Si of the positive electrode  11 . The negative-electrode support member  19  is a rod-like conductor extending from a second end portion  12 T 2  of the negative electrode  12  to the first end portion  12 T 1 . As illustrated in  FIG. 5 , a portion of the negative-electrode support member  19 , the portion being shorter than the half L/2 of the dimension L of the negative electrode  12  in the longitudinal direction E of the negative electrode  12 , is mounted to the outside portion  12 So of the negative electrode  12 . 
     In the present embodiment, the positive-electrode power feed member  14 , the negative-electrode power feed member  15 , the positive-electrode support member  18 , and the negative-electrode support member  19  are members of titanium plated with platinum, similarly to the positive electrode  11  and the negative electrode  12 . The positive-electrode power feed member  14 , the negative-electrode power feed member  15 , the positive-electrode support member  18 , and the negative-electrode support member  19  are not limited to the titanium plated with platinum, similarly to the positive electrode  11  and the negative electrode  12 . However, it is favorable to employ a material that is not dissolved in the raw water W. The positive-electrode power feed member  14  and the negative-electrode power feed member  15  are respectively joined with and are electrically connected with the positive electrode  11  and the negative electrode  12  by joining means such as welding. The positive-electrode power feed member  14  and the negative-electrode power feed member  15  are respectively joined with and mounted to the positive electrode  11  and the negative electrode  12  by joining means such as welding. 
     The plating applied to the positive-electrode power feed member  14 , the negative-electrode power feed member  15 , the positive-electrode support member  18 , and the negative-electrode support member  19  may be, for example, platinum (Pt)-iridium (Ir) plating. In the present embodiment, the negative electrode  12  may not be plated, and in this case, the negative-electrode power feed member  15  may also not be plated. 
     In the present embodiment, as illustrated in  FIG. 5 , the positive-electrode power feed member  14  and the negative-electrode power feed member  15  are respectively electrically joined with the positive electrode  11  and the negative electrode  12  at joined portions CP in a plurality of places by spot welding. The positive-electrode support member  18  and the negative-electrode support member  19  are similar to the positive-electrode power feed member  14  and the negative-electrode power feed member  15 . The joining of the positive-electrode power feed member  14  and the negative-electrode power feed member  15  is not limited to the spot welding. 
     The plurality of joined portions CP is provided not to be shifted to one place in the longitudinal direction of the positive-electrode power feed member  14  and the negative-electrode power feed member  15 . In doing so, the positive-electrode power feed member  14  and the negative-electrode power feed member  15  can supply the power from the entire own length in the longitudinal direction E. The portions of the negative-electrode power feed member  15  and the negative-electrode support member  19 , the portions being shorter than the half L/2 of the dimension L of the negative electrode  12  in the direction (longitudinal direction) E in which the negative electrode  12  extends, is mounted to the outside portion  12 So of the negative electrode  12 , as separate members. Therefore, a portion (gap) where the negative-electrode power feed member  15  and the negative-electrode support member  19  do not exist is caused between the negative-electrode power feed member  15  and the negative-electrode support member  19 , in the outside portion  12 So of the negative electrode  12 . The hydrogen-containing water generating electrode  10  can have the restraining members  40  mounted to the portion where the negative-electrode power feed member  15  and the negative-electrode support member  19  do not exist, in the outside portion  12 So of the negative electrode  12 . The restraining members  40  do not interfere with the negative-electrode power feed member  15  and the negative-electrode support member  19 . Therefore, the restraining members  40  can restrain the negative electrode  12 , the insulator  13 , and the positive electrode  11  with uniform force throughout the entire outer peripheral portion of the negative electrode  12 . 
     As illustrated in  FIGS. 4 and 5 , the positive-electrode power feed member  14  protrudes from the first end portion  11 T 1  of the positive electrode  11 , and the negative-electrode power feed member  15  protrudes from the first end portion  12 T 1  of the negative electrode  12 . In doing so, the positive-electrode power feed member  14  and the negative-electrode power feed member  15  can cause the portions protruding from the first end portions  11 T 1  and  12 T 1  to be mounted to a mounting object ST 1 , as illustrated in  FIG. 4 . As a result, the positive electrode  11  and the negative electrode  12  are mounted to the mounting object ST 1  through the positive-electrode power feed member  14  and the negative-electrode power feed member  15 . 
     In the present embodiment, the positive-electrode power feed member  14  and the negative-electrode power feed member  15  are provided with male screws  14 S and  15 S on the portions protruding from the first end portions  11 T 1  and  12 T 1 , as illustrated in  FIG. 4 . The positive-electrode power feed member  14  and the negative-electrode power feed member  15  are mounted and fixed to the mounting object ST 1  with bolts  32  and  32  respectively screwed into the male screws  14 S and  15 S. 
     The first end portion  11 T 1  of the positive electrode  11  is in contact with the mounting object ST 1 , and is fixed to the mounting object ST 1  through the positive-electrode power feed member  14  with the bolt  32 . Similarly, the first end portion  12 T 1  of the negative electrode  12  is in contact with the mounting object ST 1 , and is fixed to the mounting object ST 1  through the negative-electrode power feed member  15  with the bolt  32 . Therefore, large portions of the positive electrode  11  and the negative electrode  12  are in contact with the mounting object ST 1 , and thus can be stably mounted to the mounting object ST 1 . 
     Further, a terminal  34  that electrically connects the positive-electrode power feed member  14  and wiring, and a terminal  34  that connects the negative-electrode power feed member  15  and wiring are fixed with the respective bolts  32  and  32 , and bolts  33  and  33  respectively screwed into the male screws  14 S and  15 S. With such a structure, the power is applied to the positive electrode  11  and the negative electrode  12  through the terminals  34  and  34 , the positive-electrode power feed member  14 , and the negative-electrode power feed member  15 . 
     As illustrated in  FIGS. 4 and 5 , the positive-electrode support member  18  protrudes from the second end portion  11 T 2  of the positive electrode  11 , and the negative-electrode support member  19  protrudes from the second end portion  12 T 2  of the negative electrode  12 . In doing so, the positive-electrode power feed member  14  and the negative-electrode power feed member  15  can cause the portions protruding from the second end portions  11 T 2  and  12 T 2  to be mounted to a mounting object ST 2 , as illustrated in  FIG. 4 . As a result, the positive electrode  11  and the negative electrode  12  are mounted to the mounting object ST 2  through the positive-electrode support member  18  and the negative-electrode support member  19 . 
     In the present embodiment, the positive-electrode support member  18  and the negative-electrode support member  19  are provided with male screws  18 S and  19 S on the portions protruding from the second end portions  11 T 2  and  12 T 2 , as illustrated in  FIG. 4 . The positive-electrode support member  18  and the negative-electrode support member  19  are mounted and fixed to the mounting object ST 2  with bolts  31  and  31  respectively screwed into the male screws  18 S and  19 S. 
     The second end portion  11 T 2  of the positive electrode  11  is in contact with the mounting object ST 2 , and is fixed to the mounting object ST 2  through the positive-electrode support member  18  with the bolt  31 . Similarly, the second end portion  12 T 2  of the negative electrode  12  is in contact with the mounting object ST 2 , and is fixed to the mounting object ST 2  through the negative-electrode support member  19  with the bolt  31 . Therefore, large portions of the positive electrode  11  and the negative electrode  12  are in contact with the mounting object ST 2 , and thus can be stably mounted to the mounting object ST 2 . 
     The hydrogen-containing water generating electrode  10  can be mounted to the mounting objects ST 1  and ST 2  with the positive-electrode power feed member  14 , the negative-electrode power feed member  15 , the positive-electrode support member  18 , and the negative-electrode support member  19  from both ends of the positive electrode  11  and the negative electrode  12 . Further, the hydrogen-containing water generating electrode  10  may be mounted to one mounting object using either ones of the positive-electrode power feed member  14  and the negative-electrode power feed member  15 , or the positive-electrode support member  18  and the negative-electrode support member  19 . As described above, the hydrogen-containing water generating electrode  10  has an advantage of high flexibility of mounting. 
       FIGS. 8 and 9  are side views illustrating modifications of a hydrogen-containing water generating electrode. In the modifications, in  FIGS. 8 and 9 , the restraining member  40  illustrated in  FIG. 4  and the like is omitted. The restraining member  40  is mounted to a hydrogen-containing water generating electrode  10   a  illustrated in  FIG. 8 , and to a hydrogen-containing water generating electrode  10   b  illustrated in  FIG. 9  from outsides of negative-electrode power feed members  15   a  and  15   b  mounted to outsides of negative electrodes  12 . 
     In the hydrogen-containing water generating electrode  10   a  illustrated in  FIG. 8 , a portion of the positive-electrode power feed member  14   a , the portion being longer than half L/2 of a dimension L of a positive electrode  11  in a longitudinal direction E of the positive electrode  11 , is mounted to an inside portion  11 Si of the positive electrode  11  illustrated in  FIG. 5 . A portion of a negative-electrode power feed member  15   a , the portion being longer than the half L/2 of the dimension L of a negative electrode  12  in a longitudinal direction E of the negative electrode  12 , is mounted to an outside portion  12 So of the negative electrode  12  illustrated in  FIG. 5 . Both of the length of the portion of the positive-electrode power feed member  14   a  mounted to the positive electrode  11 , and the length of the portion of the negative-electrode power feed member  15   a  mounted to the negative electrode  12  are LS. In the present embodiment, LS&gt;L/2 is satisfied. The length LS is preferably 70% or more of the dimension L of the positive electrode  11  and the negative electrode  12  in the longitudinal direction E, and is more preferably 80% or more of the dimension L. In the present embodiment, the length LS is 95% or more of the dimension L. 
     As illustrated in  FIG. 8 , the positive-electrode power feed member  14   a  and the negative-electrode power feed member  15   a  are respectively electrically joined with the positive electrode  11  and the negative electrode  12  at joined portions CP in a plurality of places by spot welding. The plurality of joined portions CP is provided not to be shifted to one place in the longitudinal direction of the positive-electrode power feed member  14   a  and the negative-electrode power feed member  15   a . In doing so, the positive-electrode power feed member  14   a  and the negative-electrode power feed member  15   a  can supply power to the positive electrode  11  and the negative electrode  12  from the entire length in the longitudinal direction E. Therefore, the hydrogen-containing water generating electrode  10   a  can cause current distribution of the positive electrode  11  and the negative electrode  12  in the longitudinal direction E to be close to uniform distribution. Therefore, the hydrogen-containing water generating electrode  10   a  can generate hydrogen from the entire region of the negative electrode  12  in the longitudinal direction E. Further, the positive electrode  11  and the negative electrode  12  are respectively electrically connected with the positive-electrode power feed member  14   a  and the negative-electrode power feed member  15   a  in the respective large ranges in the longitudinal direction E. Therefore, the hydrogen-containing water generating electrode  10   a  can suppress a decrease in efficiency of the current, and can efficiently use the current. That is, the hydrogen-containing water generating electrode  10   a  can suppress a decrease in use efficiency of the current to be applied. As a result, the hydrogen-containing water generating electrode  10   a  can increase hydrogen content per unit power. Further, by causing the length LS of the portion of the positive-electrode power feed member  14   a  mounted to the positive electrode  11 , and the length LS of the portion of the negative-electrode power feed member  15   a  mounted to the negative electrode  12  to satisfy the above-described range, the positive electrode  11  and the negative electrode  12  can be reinforced. 
     As illustrated in  FIG. 8 , the positive-electrode power feed member  14   a  protrudes from both of a first end portion  11 T 1  and a second end portion  12 T 2  of the positive electrode  11 . The negative-electrode power feed member  15   a  protrudes from both of a first end portion  12 T 1  and a second end portion  12 T 2  of the negative electrode  12 . In doing so, the positive-electrode power feed member  14   a  and the negative-electrode power feed member  15   a  can cause the portions protruding from the first end portions  11 T 1  and  12 T 1  to be mounted to a mounting object ST 1 , and cause the portions protruding from the second end portions  11 T 2  and  12 T 2  to be mounted to a mounting object ST 2 , as illustrated in  FIG. 8 . As a result, the positive electrode  11  and the negative electrode  12  are mounted to the mounting objects ST 1  and ST 2  through the positive-electrode power feed member  14   a  and the negative-electrode power feed member  15   a.    
     In the present embodiment, the positive-electrode power feed member  14   a  and the negative-electrode power feed member  15   a  are provided with male screws  14 S 1  and  15 S 1  on the portions protruding from the first end portions  11 T 1  and  12 T 1 , as illustrated in  FIG. 8 . Further, the positive-electrode power feed member  14   a  and the negative-electrode power feed member  15   a  are provided with male screws  14 S 2  and  15 S 2  on the portions protruding from the second end portions  11 T 2  and  12 T 2 . The positive-electrode power feed member  14   a  and the negative-electrode power feed member  15   a  are mounted and fixed to the mounting object ST 1  with bolts  32  and  32  respectively screwed into the male screws  14 S 1  and  15 S 1  of the first end portion  11 T 1  side. Further, the positive-electrode power feed member  14   a  and the negative-electrode power feed member  15   a  are mounted and fixed to the mounting object ST 2  with bolts  31  and  31  respectively screwed into the male screws  14 S 2  and  15 S 2  of the second end portion  12 T 2  side. 
     Terminals  34  and  34  that connect the positive-electrode power feed member  14  and the negative-electrode power feed member  15 , and the wiring are fixed with the bolts  32 , and the bolts  33  respectively screwed into the male screws  14 S 1  and  15 S 1 . With such a structure, the power is applied to the positive electrode  11  and the negative electrode  12  through the terminals  34  and  34 , the positive-electrode power feed member  14   a , and the negative-electrode power feed member  15   a . In the hydrogen-containing water generating electrode  10   a , the positive-electrode power feed member  14  and the negative-electrode power feed member  15  protrude from both sides of the positive electrode  11  and the negative electrode  12 . Therefore, similar functions and effects to the above-described hydrogen-containing water generating electrode  10  (see  FIG. 4  and other figures) can be obtained. 
     The hydrogen-containing water generating electrode  10   b  illustrated in  FIG. 9  is different from the hydrogen-containing water generating electrode  10   a  illustrated in  FIG. 8  in that a positive-electrode power feed member  14   b  and a negative-electrode power feed member  15   b  protrude only from first end portions  11 T 1  and  12 T 1  of a positive electrode  11  and a negative electrode  12 , and do not protrude from second end portions  11 T 2  and  12 T 2 . Other structures of the hydrogen-containing water generating electrode  10   b  are similar to those of the hydrogen-containing water generating electrode  10   a  illustrated in  FIG. 8 . Therefore, the hydrogen-containing water generating electrode  10   b  can obtain similar functions and effects to the hydrogen-containing water generating electrode  10   a  illustrated in  FIG. 8 , except than only the first end portions  11 T 1  and  12 T 1  side of the positive electrode  11  and the negative electrode  12  are mounted to a mounting object ST. 
       FIGS. 10 and 11  are cross-sectional views illustrating modifications of a hydrogen-containing water generating electrode.  FIGS. 10 and 11  illustrate cross sections of hydrogen-containing water generating electrodes  10   c  and  10   d , the cross sections being perpendicular to a central axis Zt. The hydrogen-containing water generating electrode  10   c  illustrated in  FIG. 10  includes a positive electrode  11   c , a negative electrode  12   c , an insulator  13   c , a flat surface portion  10 P, and a curved surface portion  10 R connected with the flat surface portion  10 P. The positive electrode  11   c  includes a slit  11 SLa extending in a longitudinal direction, that is, in a direction in which the positive electrode  11   c  as a tubular member extends. The negative electrode  12   c  includes a slit  12 SLa extending in the longitudinal direction, that is, in a direction in which the negative electrode  12   c  as a tubular member extends. The hydrogen-containing water generating electrode  10   d  illustrated in  FIG. 11  includes a positive electrode  11   d , a negative electrode  12   d , an insulator  13   d , a first flat surface portion  10 PA, a pair of second flat surface portions  10 PB and  10 PB connected with both ends of the first flat surface portion  10 PA, and a curved surface portion  10 R connecting the pair of second flat surface portions  10 PB and  10 PB. The positive electrode  11   d  includes a slit  11 SLb extending in a longitudinal direction, that is, in a direction in which the positive electrode  11   d  as a tubular member extends. The negative electrode  12   d  includes a slit  12 SLb extending in the longitudinal direction, that is, in a direction in which the negative electrode  12   d  as a tubular member extends. 
     The positive electrodes  11   c  and  11   d , and the negative electrodes  12   c  and  12   d  included in the hydrogen-containing water generating electrodes  10   c  and  10   d  have a shape of combination of flat surfaces and curved surfaces. Further, the hydrogen-containing water generating electrodes  10 ,  10   a , and  10   b  illustrated in  FIGS. 1, 2, 8, 9 , and other figures have a cylindrical shape, and thus have a curved surface throughout the entire circumferences of the positive electrodes  11  and the negative electrodes  12 . As described above, in the present embodiment, at least a part of the positive electrodes  11 ,  11   c , and  11   d , and the negative electrode  12 ,  12   c , and  12   d  included in the hydrogen-containing water generating electrodes  10 ,  10   a ,  10   b ,  10   c , and  10   d  may just have a curved surface. The hydrogen-containing water generating electrode  10  can cause the bubbles of hydrogen to be efficiently separated from the negative electrode  12  throughout the entire circumference, and can cause hydrogen to be dissolved in the raw water W, by forming the positive electrode  11  and the negative electrode  12  in the cylindrical shape. Further, the hydrogen-containing water generating electrode  10  can be easily manufactured by forming the positive electrode  11  and the negative electrode  12  in the cylindrical shape. 
     The hydrogen-containing water generating electrodes  10 ,  10   a ,  10   b ,  10   c , and  10   d  can efficiently generate hydrogen by forming the positive electrodes  11 ,  11   c , and  11   d , and the negative electrodes  12 ,  12   c , and  12   d  in a shape including a curved surface. When the hydrogen-containing water generating electrodes  10 ,  10   a ,  10   b ,  10   c , or  10   d  is put in the raw water W and used, it is favorable to install the hydrogen-containing water generating electrode so that the curved surface portion faces upward (a side of a direction opposite to a direction in which the gravity acts). Next, the openings  11 H,  12 H, and  13 H included in the positive electrode  11 , the negative electrode  12 , and the insulator  13  will be described. 
       FIG. 12  is a diagram illustrating a partially enlarged positive electrode and a partially enlarged negative electrode.  FIG. 13  is an enlarged view of openings included in the positive electrode and the negative electrode.  FIG. 14  is a B-B cross-sectional view of  FIG. 12 .  FIG. 15  is a diagram illustrating a partially enlarged insulator. The positive electrode  11  and the negative electrode  12  are net-like members in which a plurality of linear portions  16  intersects with one another. The portion surrounded by the plurality of linear portions  16  serves as the openings  11 H and  12 H of the positive electrode  11  and the negative electrode  12 . In the present embodiment, the openings  11 H and  12 H included in the positive electrode  11  and the negative electrode  12  have a rhombic shape. In the openings  11 H and  12 H, one diagonal line (first diagonal line) TLl is longer than the other diagonal line (second diagonal line) TLs. In the openings  11 H and  12 H, angles in apexes Pa and Pb on the first diagonal line TLl are smaller than angles in apexes Pc and Pd on the second diagonal line TLs. 
     Since the positive electrode  11  and the negative electrode  12  include the plurality of openings  11 H and  12 H, lines of electric force can be provided to an inside and to an outside through the openings  11 H and  12 H. Therefore, both surface of the positive electrode  11  and the negative electrode  12  can be used for electrolysis, and thus hydrogen can be efficiently generated. Further, the negative electrode  12  can cause a wet angle of the bubbles of hydrogen generated by the negative electrode  12  itself to be small, with the opening  12 H surrounded by the linear portions  16 , and thus can cause the bubbles of hydrogen to be separated in a small state. That is, absorption power caused between the generated hydrogen and a surface of the negative electrode  12  almost becomes in a point contact state, and surface tension is suppressed. Therefore, as a result, the negative electrode  12  can cause the bubbles of hydrogen to be separated in a small state, and can generate the hydrogen-containing water in which a large amount of hydrogen is dissolved. 
     In the present embodiment, cross sections of the linear portions  16  of the positive electrode  11  and the negative electrode  12  have a rectangular shape (a square shape in the example of  FIG. 14 ), as illustrated in  FIG. 14 . The negative electrode  12  can cause the wet angle of the bubbles of hydrogen to be smaller with corners  16 T in the linear portion  16  to suppress the surface tension, and thus can cause the bubbles of hydrogen to be separated in a smaller state. Therefore, the negative electrode  12  can generate hydrogen water in which smaller bubbles of hydrogen are dissolved. Further, the negative electrode  12  includes the linear portion  16  with a rectangular cross section, and thus can cause a surface area that can be used for generation of hydrogen to be large. According to these functions, efficiency to dissolve hydrogen in the raw water of the negative electrode  12  is improved. 
     In the present embodiment, in the openings  11 H and  12 H, the first diagonal line TLl extends in the direction in which the positive electrode  11  and the negative electrode  12  extend, that is, in the longitudinal direction E, as illustrated in  FIG. 13 . The second diagonal line TLs extends in the circumferential direction C of the positive electrode  11  and the negative electrode  12  having a cylindrical shape. The positive electrode  11  and the negative electrode  12  include the end-portion-side opening portions  10 HA and  10 HB in both sides in the longitudinal direction E, as illustrated in  FIGS. 1 and 2 . The bubbles of oxygen generated inside the positive electrode  11  are released through the end-portion-side opening portion  10 HA,  10 HB to the outside of the hydrogen-containing water generating electrode  10 , as illustrated in  FIG. 3 . At this time, since the longitudinal direction of the opening  11 H of the positive electrode  11  accords with the direction in which the bubbles of oxygen are moved. Therefore, the bubbles of oxygen can be easily moved to the end-portion-side opening portions  10 HA and  10 HB. As a result, the hydrogen-containing water generating electrode  10  can efficiently release the bubbles of oxygen to the outside. Further, in the opening  11 H of the positive electrode  11 , angles of the apexes Pa and Pb on the first diagonal line TLl are acute angles. Therefore, the contact area between the bubbles of oxygen, and the linear portion  16  can be made small. As a result, the bubbles of oxygen can be easily separated from the linear portion  16 . Therefore, the hydrogen-containing water generating electrode  10  can efficiently release the bubbles of oxygen to the outside. Further, in the positive electrode  11 , the linear portion  16  includes the corners  16 T, the wet angle of the bubbles of oxygen can be made smaller with the corners  16 T, and the surface tension can be suppressed. As a result, the positive electrode  11  can cause the bubbles of oxygen to be promptly separated from the linear portion  16 , and moved to the end-portion-side opening portions  10 HA and  10 HB. Therefore, the hydrogen-containing water generating electrode  10  can efficiently release the bubbles of oxygen to the outside. Further, in the process in which the bubbles of oxygen are moved along the inside of the positive electrode  11 , the bubbles take in bubbles of oxygen newly generated on the positive electrode  11  side, and grow. Therefore, the contact area between the bubbles of oxygen, and the raw water W can be made small, and dissolving of oxygen to the raw water W can be suppressed. 
     As illustrated in  FIG. 15 , the insulator  13  is a net-like member in which a plurality of linear members  17  intersect with one another, and a portion surrounded by the linear members  17  is the opening  13 H. The opening  13 H has a rectangular shape (a square shape in the present embodiment). The length of one side is La, and the length of a side adjacent to the side of La is Lb in the opening  13 H. In the present embodiment, the opening  13 H has a square shape, and thus La=Lb. The side having the length of La is parallel to the longitudinal direction E of the positive electrode  11  and the negative electrode  12 , and the side having the length of Lb is parallel to the circumferential direction C of the positive electrode  11  and the negative electrode  12  having a cylindrical shape. 
     In the present embodiment, the opening  11 H of the positive electrode  11  and the opening  12 H of the negative electrode  12  are larger than the opening  13 H of the insulator  13 . The area of the openings  11 H and  12 H is Ll×Ls/2 where the length of the first diagonal line TLl is Ll, and the length of the second diagonal line TLs is Ls. The area (opening area) of the opening  13 H is La×Lb. Therefore, Ll×Ls/2&gt;La×Lb is satisfied. In the present embodiment, for example, the length Ll of the first diagonal line TLl is 6 mm, the length Ls of the second diagonal line TLs is 3 mm. Therefore, the area of the openings  11 H and  12 H is 9 mm 2 . In the opening  13 H, La=Lb=1.06 mm, for example. Therefore, twenty four openings  13 H per inch are arrayed in the insulator  13 . The area (opening area) of the opening  13 H becomes 1.12 mm 2 . As described above, in the present embodiment, the area of the openings  11 H and  12 H of the positive electrode  11  and the negative electrode  12  is about eight times the area of the opening  13 H. 
     When the opening  13 H of the insulator  13  is larger than the openings  11 H and  12 H of the positive electrode  11  and the negative electrode  12 , a possibility that the positive electrode  11  and the negative electrode  12  come in contact with each other through the opening  13 H of the insulator  13  becomes high. The hydrogen-containing water generating electrode  10  can avoid the mutual contact of the positive electrode  11  and the negative electrode  12  through the opening  13 H of the insulator  13 , by causing the opening  13 H of the insulator  13  to be smaller than the openings  11 H and  12 H of the positive electrode  11  and the negative electrode  12 . In this way, the hydrogen-containing water generating electrode  10  can avoid short-circuit of the positive electrode  11  and the negative electrode  12 , and can secure insulation of these electrodes, even if the distance between the positive electrode  11  and the negative electrode  12  is made small. Therefore, the hydrogen-containing water generating electrode  10  is suitable for the system being put in the raw water W, which is required to suppress the voltage applied to the positive electrode  11  and the negative electrode  12  to be low. 
     In the present embodiment, the insulator  13  is a net-like member in which the plurality of linear members  17  intersects with one another. When such a net-like member is used as the insulator  13 , the insulator  13  is allowed to have deformation in the thickness direction to some extent. Therefore, when the hydrogen-containing water generating electrode  10  is subject to vibration or impact, the insulator  13  can absorb the vibration or the impact. If the net-like member in which the plurality of linear members  17  intersect with one another is used as the insulator  13 , the insulator  13  is suitable for the portable hydrogen-containing water generating electrode  10 , which can be moved and carried. 
     In the hydrogen-containing water generating electrode  10 , the opening  13 H of the insulator  13  is smaller than the openings  11 H and  12 H of the positive electrode  11  and the negative electrode  12 . Therefore, the bubbles of oxygen generated on the positive electrode  11  side are captured with the linear members  17  of the insulator  13 , and large bubbles can be made. When the bubbles of oxygen become large, dissolving of oxygen to the raw water W is suppressed. Therefore, the hydrogen-containing water generating electrode  10  can generate the hydrogen-containing water having a high dissolution ratio of the bubbles of hydrogen. Further, when the bubbles of oxygen become large, buoyancy becomes large. As a result, the bubbles of oxygen can be easily moved inside the positive electrode  11 , and can easily pass through the opening  13 H. Therefore, the hydrogen-containing water generating electrode  10  can easily release the bubbles of oxygen from the inside. 
     Further, the bubbles of oxygen not captured with the linear members  17  pass through the opening  13 H of the insulator  13 , and take the bubbles of hydrogen adhering to the linear portions  16  of the negative electrode  12  and separate the bubbles of hydrogen from the linear portions  16 . Therefore, the hydrogen-containing water generating electrode  10  can promptly separate the bubbles of hydrogen, which are generated at the negative electrode  12 , from the negative electrode  12 , and can cause the bubbles of hydrogen to be dissolved in the raw water W. Next, a method of manufacturing the hydrogen-containing water generating electrode  10  will be described. 
     &lt;Method of Manufacturing Hydrogen-Containing Water Generating Electrode&gt; 
       FIG. 16  is a flowchart of a method of manufacturing the hydrogen-containing water generating electrode according to the present embodiment.  FIGS. 17 to 26  are diagrams illustrating respective steps of the method of manufacturing the hydrogen-containing water generating electrode according to the present embodiment. In manufacturing the hydrogen-containing water generating electrode  10 , first, at step S 101 , as illustrated in  FIGS. 17 and 18 , a positive electrode material  11 M and a negative electrode material  12 M as conductors are bent to form members having an approximately cylindrical shape. The positive electrode material  11 M and the negative electrode material  12 M are plate-like conductors having a plurality of openings (corresponding to the opening  11 H of the positive electrode  11  and the opening  12 H of the negative electrode  12  illustrated in  FIG. 4  and other figures, and omitted in  FIGS. 17 and 18 ). The members having an approximately cylindrical shape, which are the bent positive electrode material  11 M and negative electrode material  12 M, have the slits  11 SL and  12 SL that are each a removed portion in a circumferential direction C and extend in the longitudinal direction E, that is, in a direction in which the members having an approximately cylindrical shape extend. As illustrated in  FIG. 17 , the slit  11 SL is formed between facing end portions  11 MT and  11 MT of the positive electrode material  11 M. As illustrated in  FIG. 18 , the slit  12 SL is formed between facing end portions  12 MT and  12 MT of the negative electrode material  12 M. 
     The longitudinal direction E of the positive electrode material  11 M is parallel to the first diagonal line TLl of the opening  11 H of the positive electrode material illustrated in  FIG. 19 . The first diagonal line TLl of the opening  11 H is longer than the second diagonal line TLs. Therefore, in the opening  11 H illustrated in  FIG. 19 , the second diagonal line TLs shorter than the first diagonal line TLl extends in the circumferential direction C of the member having an approximately cylindrical shape that is the bent positive electrode material  11 M. As a result, the positive electrode material  11 M can be easily bent in a cylindrical manner, and dimension accuracy of the positive electrode  11  can be easily secured. 
     The longitudinal direction E of the negative electrode material  12 M is parallel to the first diagonal line TLl of the opening  12 H of the negative electrode material illustrated in  FIG. 20 . The first diagonal line TLl of the opening  12 H is longer than the second diagonal line TLs. Therefore, in the opening  12 H illustrated in  FIG. 20 , the second diagonal line TLs shorter than the first diagonal line TLl extends in the circumferential direction C of the member having an approximately cylindrical shape that is the bent negative electrode material  12 M. As a result, the negative electrode material  12 M can be easily bent in a cylindrical manner, and dimension accuracy of the negative electrode  12  can be easily secured. 
     Next, at step S 102 , a power feed member and a support member are mounted to each of the positive electrode material  11 M and the negative electrode material  12 M bent in the cylindrical shape (see  FIGS. 21 and 22 ). The power feed member is the positive-electrode power feed member  14  illustrated in  FIG. 21  and the negative-electrode power feed member  15  illustrated in  FIG. 22 . The support member is the positive-electrode support member  18  illustrated in  FIG. 21  and the negative-electrode support member  19  illustrated in  FIG. 22 . 
     As illustrated in  FIG. 21 , the positive-electrode power feed member  14  and the positive-electrode support member  18  are mounted to an inner side surface  11 Mi of the bent positive electrode material  11 M. The positive-electrode power feed member  14  and the positive-electrode support member  18  are connected and mounted to the positive electrode material  11 M such that the longitudinal direction becomes parallel to the first diagonal line TLl of the opening  11 H illustrated in  FIG. 19 . The positive-electrode power feed member  14  and the positive-electrode support member  18  are joined with the positive electrode material  11 M by welding, for example. Therefore, the positive-electrode power feed member  14  and the positive electrode material  11 M are electrically connected. 
     As illustrated in  FIG. 22 , the negative-electrode power feed member  15  and the negative-electrode support member  19  are mounted to an outer side surface  12 Mo of the bent negative electrode material  12 M. The negative-electrode power feed member  15  and the negative-electrode support member  19  are connected and mounted to the negative electrode material  12 M such that the longitudinal direction becomes parallel to the first diagonal line TLl of the opening  12 H illustrated in  FIG. 20 . The negative-electrode power feed member  15  and the negative-electrode support member  19  are joined with the negative electrode material  12 M by welding, for example. Therefore, the negative-electrode power feed member  15  and the negative electrode material  12 M are electrically connected. 
     The positive electrode material  11 M to which the positive-electrode power feed member  14  and the positive-electrode support member  18  are mounted, and the negative electrode material  12 M to which the negative-electrode power feed member  15  and the negative-electrode support member  19  are mounted are subjected to plating (platinum plating in the present embodiment). When plating is not applied to the negative electrode  12 , plating is applied to only the positive electrode material  11 M to which the positive-electrode power feed member  14  and the positive-electrode support member  18  are mounted. In this way, the positive electrode  11  and the negative electrode  12  are completed. Both of the positive electrode  11  and the negative electrode  12  are a tubular conductor, include a plurality of openings in a side portion, and include the slit  11 SL and  12 SL that are each a removed portion in the circumferential direction and extend in the longitudinal direction E, that is, in the direction in which the tubular conductors extend. 
     Next, the process proceeds to step S 103 , as illustrated in  FIG. 23 , a side portion  11 S of the positive electrode  11  that is a tubular conductor and has a plurality of openings  11 H in the side portion  11 S is covered with the net-like insulator  13 . In covering the side portion  11 S of the positive electrode  11  with the insulator  13 , the position of the slit  11 SL is not especially limited. 
     Next, at step S 104 , as illustrated in  FIG. 24 , the positive electrode  11  and the insulator  13  are passed through the slit  12 SL, and the negative electrode  12  is mounted to an outside of the insulator  13 . When the positive electrode  11  and the insulator  13  are passed through the slit  12 SL of the negative electrode  12 , the slit  12 SL is enlarged. When the positive electrode  11  and the insulator  13  are arranged inside the negative electrode  12 , at step S 105 , the enlarged slit  12 SL is closed. 
     Following that, at step S 106 , as illustrated in  FIG. 25 , the restraining members  40  are mounted to an outside of the negative electrode  12 , and restrains the negative electrode  12 , the insulator  13 , and the positive electrode  11 . The plurality of restraining members  40  is mounted between the negative-electrode power feed member  15  and the negative-electrode support member  19 . As the restraining members  40 , for example, a resin cable tie or a metal line material having high corrosion resistance and not dissolved in the raw water W can be used. The negative electrode  12 , the insulator  13 , and the positive electrode  11  are restrained by the restraining members  40 , so that the hydrogen-containing water generating electrode  10  is completed, as illustrated in  FIG. 26 . An excess insulator  13  may be taken out through the closed slit  12 SL to an outside of the negative electrode  12 . 
     Force toward the circumferential direction is provided to the negative electrode  12  and the positive electrode  11  that are the members having a cylindrical shape by the restraining members  40 . Therefore, the slit  11 SL of the positive electrode  11  and the slit  12 SL of the negative electrode  12  are closed. The positive electrode  11  is a conductor and is an elastic body, and deformation to close the slit  11 SL is deformation within a range of elastic deformation of the material of the positive electrode  11 . Therefore, when the slit  11 SL of the positive electrode  11  is closed, force to open the closed slit  11 SL is caused in the positive electrode  11 . 
     Since the positive electrode  11  is restrained by the restraining members  40  through the negative electrode  12 , the force caused in the positive electrode  11  acts to press the positive electrode  11  and the insulator  13  to the negative electrode  12 . As a result, the insulator  13  is reliably in contact with the positive electrode  11  and the negative electrode  12 , and the gap formed between the positive electrode  11  and the negative electrode  12  is accurately defined by the thickness of the insulator  13 . Further, deviation between the positive electrode  11 , the insulator  13 , and the negative electrode  12  are suppressed by the force caused in the positive electrode  11 . In this way, the hydrogen-containing water generating electrode  10  used in a portable device can be manufactured. 
     The method of manufacturing a hydrogen-containing water generating electrode according to the present embodiment does not use joining such as welding except that the power feed member and the support member are mounted to the positive electrode material  11 M and the negative electrode material  12 M. Therefore, the hydrogen-containing water generating electrode  10  can be easily disassembled into the positive electrode  11 , the negative electrode  12 , and the insulator  13  by removing the restraining members  40 . Therefore, maintenance, inspection, repair, and part replacement can be easily performed. Further, recycling of the hydrogen-containing water generating electrode  10  is also easy. Next, a hydrogen-containing water generating device including the hydrogen-containing water generating electrode  10  will be described. 
     &lt;Hydrogen-Containing Water Generating Device&gt; 
       FIG. 27  is a diagram illustrating a hydrogen-containing water generating device according to the present embodiment.  FIG. 28  is a diagram illustrating a first support included in the hydrogen-containing water generating device according to the present embodiment.  FIG. 29  is a diagram illustrating a second support included in the hydrogen-containing water generating device according to the present embodiment.  FIG. 30  is a diagram illustrating an opening of a protection member and an opening of a negative electrode included in the hydrogen-containing water generating device according to the present embodiment. A hydrogen-containing water generating device  100  is a device that includes the above-described hydrogen-containing water generating electrode  10 , puts in the raw water W, and generates the hydrogen-containing water. 
     The hydrogen-containing water generating device  100  includes a first support  101 , a second support  102 , and the hydrogen-containing water generating electrode  10 . In the present embodiment, the hydrogen-containing water generating device  100  further includes a protection member  103 . The first support  101  is mounted to a first end portion  10 T 1  side of the hydrogen-containing water generating electrode  10 . The first support  101  includes a first installation portion  101 C that comes in contact with the installing object FL of the hydrogen-containing water generating device  100 . The installing object FL is, for example, a bottom portion of a bath or a bottom portion of a drinking water tank. In the present embodiment, the first installation portion  101 C is a side portion around the central axis Zt of the hydrogen-containing water generating electrode  10 , of side portions of the first support  101 . 
     The second support  102  is mounted to a second end portion  10 T 2  side of the hydrogen-containing water generating electrode  10 . The second support  102  includes a second installation portion  102 C that comes in contact with the installing object FL. In the present embodiment, the second installation portion  102 C is a side portion around the central axis Zt of the hydrogen-containing water generating electrode  10 , of side portions of the second support  102 . A distance (second-support-side height) h 2  of the second support  102  from the side portion  11 S of the positive electrode  11  to the second installation portion  102 C in a direction perpendicular to the side portion  11 S of the positive electrode  11  included in the hydrogen-containing water generating electrode  10  is larger than a distance (first-support-side height) h 1  from the side portion  11 S of the positive electrode  11  to the first installation portion  101 C in the direction perpendicular to the side portion  11 S of the positive electrode  11 . Therefore, a height H 1  of the first support  101  illustrated in  FIG. 28  is smaller than a height H 2  of the second support  102  illustrated in  FIG. 29 . In this example, both of the first-support-side height h 1  and the second-support-side height h 2  are based on portions installed on the installing object FL. 
     The first end portion  10 T 1  of the hydrogen-containing water generating electrode  10  corresponds to the first end portions  11 T 1  and  12 T 1  of the positive electrode  11  and the negative electrode  12  illustrated in  FIG. 4  and other figures, and the second end portion  10 T 2  corresponds to the second end portions  11 T 2  and  12 T 2  of the positive electrode  11  and the negative electrode  12 . A direction perpendicular to a side portion  12 S of the negative electrode  12  corresponds to the direction perpendicular to the central axis Zt of the hydrogen-containing water generating electrode  10 . The first support  101  and the second support  102  are manufactured by molding a resin, for example. The first support  101  and the second support  102  support the hydrogen-containing water generating electrode  10  when being installed on the installing object FL. 
     The protection member  103  is a tubular (a cylindrical shape in the present embodiment) member, and includes a plurality of openings  103 H in the side portion. The plurality of openings  103 H included in the protection member  103  penetrates the side portion of the protection member  103  in the thickness direction of the protection member  103 . The protection member  103  is provided outside the hydrogen-containing water generating electrode  10 , to be specific, outside the negative electrode  12 . A first end portion  103 T 1  of the protection member  103  is supported by the first support  101 , and a second end portion  103 T 2  is supported by the second support  102 . With such a structure, the hydrogen-containing water generating electrode  10  and the protection member  103  are supported by the first support  101  and the second support  102  at both end portion sides. 
     The protection member  103  is provided outside the hydrogen-containing water generating electrode  10 , and protects the hydrogen-containing water generating electrode  10 . Further, the protection member  103  is put in the raw water W and is in contact with the raw water W at the time of use of the hydrogen-containing water generating device  100 . Therefore, the protection member  103  is made of stainless steel or the like having high strength and corrosion resistance. The protection member  103  mounted to the first support  101  and the second support  102  has strength of some extent to protect the hydrogen-containing water generating electrode  10 . Therefore, the protection member  103  also functions as a structure member for securing the strength of the hydrogen-containing water generating device  100  together with the first support  101  and the second support  102 . 
     As illustrated in  FIGS. 27 and 28 , the first support  101  includes a first opening portion  101 H as an opening portion connected with a space surrounded by the side portion of the positive electrode  11 . As illustrated in  FIGS. 27 and 29 , the second support  102  includes a second opening portion  102 H as an opening portion connected with a space surrounded by the side portion of the positive electrode  11 . The first opening portion  101 H and the second opening portion  102 H connect an inner portion of the positive electrode  11  of the hydrogen-containing water generating electrode  10  and an outside, and serve as a passage of bubbles of oxygen generated on the positive electrode  11  side. At least one of the first support  101  and the second support  102  may have the opening portion connected with the space surrounded by the side portion of the positive electrode  11 . 
     As described above, by causing the second-support-side height h 2  to be larger than the first-support-side height h 1 , the hydrogen-containing water generating electrode  10  is inclined with respect to a ground plane of the installing object FL such that, toward the second support  102  from the first support  101 , the distance from the installing object FL becomes large. The positive electrode  11  of the hydrogen-containing water generating electrode  10  has a tubular shape, and the shape of a cross section perpendicular to the central axis Zt is constant in a direction parallel to the central axis Zt. Therefore, the positive electrode  11 , especially, the inside of the positive electrode  11  of the side separated from the first installation portion  101 C and the second installation portion  102 C (an upper inside of the positive electrode) is inclined such that, toward the second support  102  from the first support  101 , the distance from the installing object FL becomes large. 
     By causing the positive electrode  11  and the upper inside of the positive electrode of the positive electrode  11  in hydrogen-containing water generating device  100  to be inclined as described above, the bubbles of oxygen generated on the positive electrode  11  side are gathered to an upper side of the positive electrode  11 . Then, the bubbles of oxygen are moved toward the second opening portion  102 H of the second support  102  along the upper inside of the positive electrode due to influence of buoyancy, and are released to the outside of the hydrogen-containing water generating device  100 , to be specific, to the outside of the hydrogen-containing water generating electrode  10 . As described above, in the hydrogen-containing water generating device  100 , the positive electrode  11  is inclined so as to be away from the ground plane of the installing object FL toward the second opening portion  102 H, and thus can efficiently and promptly release the bubbles of oxygen in the positive electrode  11  through the second opening portion  102 H to the outside, using the buoyancy of the bubbles of oxygen. Therefore, the hydrogen-containing water generating device  100  can release the bubbles of oxygen in the positive electrode  11  to the outside even if there is no passing water to the hydrogen-containing water generating electrode  10 . 
     An angle (angle of inclination) formed by the hydrogen-containing water generating electrode  10  and the ground plane of the installing object FL is θ. In the present embodiment, the angle of inclination θ is an angle formed by a virtual ground plane FLv parallel to the ground plane of the installing object FL, and the central axis Zt of the hydrogen-containing water generating electrode  10 , for convenience. The angle of inclination θ is preferably 0.5 degrees or more from a perspective of efficient release of the bubbles of oxygen to the outside of the hydrogen-containing water generating electrode  10 , more preferably 1 degree or more, and still more preferably 1.5 degrees or more. If the angle of inclination θ falls within these ranges, the hydrogen-containing water generating device  100  can efficiently and promptly release the bubbles in the hydrogen-containing water generating electrode  10 . 
     If the angle of inclination θ is made large, the bubbles of oxygen generated in the positive electrode  11  are released into the raw water before being united and becoming a sufficient size. As a result, if the angle of inclination θ is large, the amount of oxygen dissolved in the raw water tends to be increased. The angle is preferably 5 degrees or less from a perspective of suppression of the amount of oxygen dissolved in the raw water, more preferably 4 degrees or less, still more preferably 3 degrees or less. If the angle of inclination θ falls within these ranges, the hydrogen-containing water generating device  100  can suppress the amount of oxygen dissolved in the raw water. Further, if the angle of inclination θ falls within these ranges, an excessive increase in the height of the hydrogen-containing water generating device  100 , to be specific, the height H 2  of the second support  102  illustrated in  FIG. 27  can be suppressed, and the hydrogen-containing water generating device  100  can be made compact. The angle of inclination θ is preferably from 0.5 to 5 degrees, both inclusive, more preferably from 1 to 4 degrees, both inclusive, and still more preferably from 1.5 to 3 degrees, both inclusive. In the present embodiment, the angle of inclination θ is 2 degrees. 
     The hydrogen-containing water generating device  100  includes the first opening portion  101 H in the first support  101 , and the second opening portion  102 H in the second support  102 . Therefore, the hydrogen-containing water generating electrode  10  can be washed from at least one of the first opening portion  101 H and the second opening portion  102 H. For example, dirt and the like of the hydrogen-containing water generating electrode  10 , especially, of the positive electrode  11  can be removed by jetting rinse water to the hydrogen-containing water generating electrode  10  with a hose or the like through the first opening portion  101 H, or by inserting a brush or the like through the first opening portion  101 H. As described above, the hydrogen-containing water generating device  100  includes the first opening portion  101 H and the second opening portion  102 H, and thus enables work in washing the hydrogen-containing water generating electrode  10  to become easy. Other than the washing with water, minerals deposited on the surfaces of the positive electrode  11  and the negative electrode  12  of the hydrogen-containing water generating electrode  10  are removed by immersing the hydrogen-containing water generating device  100  in a cleaning solution (for example, an aqueous solution of citric acid) for a predetermined time. In this way, it is not necessary to supply the water or the cleaning solution used for washing separately from the raw water W, the hydrogen-containing water generating electrode  10  can be of a simple structure. Note that the hydrogen-containing water generating device  100  can obtain the above-described functions and effects as long as including at least one of the first opening portion  101 H and the second opening portion  102 H. Next, a relationship between the opening  103 H of the protection member  103  and the opening  12 H of the negative electrode  12  will be described. 
     In the present embodiment, as illustrated in  FIG. 30 , the shape of the opening  103 H of the protection member  103  is a circle with a diameter of D. The opening  103 H of the protection member  103  is larger than the opening  12 H of the negative electrode  12 . To be specific, the area of the opening  103 H is π×D 2 /4, and the area of the opening  12 H is Ll×Ls/2, and thus π×D 2 /4&gt;Ll×Ls/2 is satisfied. In doing so, the bubbles of hydrogen generated on the negative electrode  12  side can efficiently pass through the opening  103 H of the protection member  103 , and can be efficiently dissolved in the raw water W. The opening  103 H of the protection member  103  is formed into a circular shape, so that the opening  103 H can be easily manufactured. 
       FIG. 31  is a diagram illustrating another use state of the hydrogen-containing water generating device according to the present embodiment. The hydrogen-containing water generating device  100  may be installed so that the second opening portion  102 H side of the second support  102  faces the installing object FL. Alternatively, the hydrogen-containing water generating device  100  may be installed so that the first opening portion  101 H side of the first support  101  faces the installing object FL. In doing so, the central axis Zt of the hydrogen-containing water generating electrode  10  becomes perpendicular to the ground plane of the installing object FL. The bubbles of oxygen generated on the positive electrode  11  side of the hydrogen-containing water generating electrode  10  are released into the raw water W through the first opening portion  101 H of the first support  101  arranged at an opposite side to the installing object FL. When the hydrogen-containing water generating device  100  is installed so that the first opening portion  101 H side of the first support  101  faces the installing object FL, the bubbles of oxygen generated on the positive electrode  11  side of the hydrogen-containing water generating electrode  10  are released into the raw water W through the second opening portion  102 H of the second support  102 . 
     The bubbles of hydrogen generated on the negative electrode  12  side of the hydrogen-containing water generating electrode  10  are released from the entire circumference of the negative electrode  12  into the raw water W, and pass through the opening  103 H of the protection member  103 . In this way, both of the first support  101  and the second support  102  of the hydrogen-containing water generating device  100  may be installed on the installing object FL, or only the second support  102  may be installed on the installing object FL. Therefore, the hydrogen-containing water generating device  100  can be used in a different form according to a use environment. 
     It is favorable to install one having a larger area between the first support  101  and the second support  102  of the hydrogen-containing water generating device  100  to face the installing object FL. In doing so, the hydrogen-containing water generating device  100  can be stably installed. 
     (Mounting Structure of Hydrogen-Containing Water Generating Electrode) 
       FIGS. 32 and 33  are diagrams illustrating mounting structures of when the hydrogen-containing water generating electrode is mounted to the hydrogen-containing water generating device according to the present embodiment.  FIG. 34  is a diagram illustrating another mounting structure of when the hydrogen-containing water generating electrode is mounted to the hydrogen-containing water generating device according to the present embodiment.  FIGS. 32 and 33  illustrate a case in which the hydrogen-containing water generating device  100  is used being put in a bath. As illustrated in  FIGS. 32 and 33 , in the present embodiment, the hydrogen-containing water generating electrode  10  is supported by the first support  101  and the second support  102  with the positive-electrode power feed member  14  and the negative-electrode power feed member  15 . By use of the positive-electrode power feed member  14 , the negative-electrode power feed member  15 , the positive-electrode support member  18 , and the negative-electrode support member  19 , the hydrogen-containing water generating electrode  10  can be mounted to the first support  101  and the second support  102  with a relatively simple structure. 
     As illustrated in  FIG. 32 , the positive-electrode power feed member  14  protruding from the first end portion  11 T 1  side of the positive electrode  11  and the negative-electrode power feed member  15  protruding from the first end portion  12 T 1  side of the negative electrode  12  are mounted to the first support  101 . The first support  101  corresponds to the mounting object ST 1  illustrated in FIG.  4 . As illustrated in  FIG. 33 , the positive-electrode support member  18  protruding from the second end portion  11 T 2  side of the positive electrode  11  and the negative-electrode support member  19  protruding from the second end portion  12 T 2  side of the negative electrode  12  are mounted to the second support  102 . The second support  102  corresponds to the mounting object ST 2  illustrated in  FIG. 4 . 
     The first support  101  includes a mounting seat  101 B, a tubular side-portion-side cover  101 CS, and a plate-like cover  101 CB. The mounting seat  101 B supports the hydrogen-containing water generating electrode  10  and the protection member  103 . The mounting seat  101 B includes a tubular member (hereinafter, referred to as tubular member)  101 IW at an opposite side to the hydrogen-containing water generating electrode  10 . The tubular member  101 IW extends toward a direction being away from the mounting seat  101 B. An inside of the tubular member  101 IW serves as a passage that connects the inside of the positive electrode  11  and the outside of the first support  101 . The cover  101 CB is mounted to an end portion of the side-portion-side cover  101 CS and an end portion of the tubular member  101 IW. The cover  101 CB includes an opening  101 CBH connected with the inside of the tubular member  101 IW. The tubular member  101 IW, to be specific, the inside of the tubular member  101 IW and the opening  101 CBH of the cover  101 CB serve as the first opening portion  101 H. 
     The mounting seat  101 B is a member to which the positive-electrode power feed member  14  and the negative-electrode power feed member  15  are mounted, and supports the hydrogen-containing water generating electrode  10  through the positive-electrode power feed member  14  and the negative-electrode power feed member  15 . The positive-electrode power feed member  14  and the negative-electrode power feed member  15  are mounted to and supported by the mounting seat  101 B with bolts  32  respectively screwed into the male screws  14 S and  15 S, as illustrated in  FIG. 32 . The first end portions  11 T 1  and  12 T 1  of the positive electrode  11  and the negative electrode  12  are in contact with a mounting surface  101 P that is one surface of the mounting seat  101 B. The mounting seat  101 B is held by the first end portions  11 T 1  and  12 T 1  of the positive electrode  11  and the negative electrode  12 , and the bolts  32  and  32 . With such a structure, the hydrogen-containing water generating electrode  10  is mounted to and supported by the mounting seat  101 B through the positive-electrode power feed member  14  and the negative-electrode power feed member  15 . 
     The first opening portion  101 H included in the first support  101  faces the opening portions of the positive electrode  11  and the negative electrode  12 , the opening portions being at the side of the first end portions  11 T 1  and  12 T 1 . Therefore, the bubbles of oxygen in the positive electrode  11  pass through the first opening portion  101 H, and are released to the outside of the hydrogen-containing water generating device  100 . 
     The terminal  34  that connects the positive-electrode power feed member  14  and wiring  25 , and the terminal  34  that connects the negative-electrode power feed member  15  and wiring  25  are arranged in a space (first-support-member inner space)  101 SP surrounded by the mounting seat  101 B, the cover  101 CB, the side-portion-side cover  101 CS, and the tubular member  101 IW. The wiring  25  is pulled out to the outside from the first-support-member inner space  101 SP through a grommet  26  provided in a hole  102 SPH provided in the side-portion-side cover  101 CS. The wiring  25  is electrically connected with the terminals  34  and  34 . The grommet  26  lying between the wiring  25  and the side-portion-side cover  101 CS of the first support  101  is a member that protects the wiring  25 , and waterproofs the first-support-member inner space  101 SP, and is made of, for example, rubber. A waterproof agent is filled in the first-support-member inner space  101 SP. The positive-electrode power feed member  14 , the negative-electrode power feed member  15 , the terminal  34 , and the wiring  25  are waterproofed with the waterproof agent. 
     As illustrated in  FIG. 33 , the positive-electrode support member  18  and the negative-electrode support member  19  are mounted to and supported by the second support  102  with the bolts  31  respectively screwed into the male screws  18 S and  19 S. The second end portions  11 T 2  and  12 T 2  of the positive electrode  11  and the negative electrode  12  are in contact with a mounting surface  102 P that is one surface of the second support  102 . The second support  102  is held by the second end portions  11 T 2  and  12 T 2  of the positive electrode  11  and the negative electrode  12 , and the bolts  31  and  31 . The bolts  31  are embedded in a spot facing hole  102 BH provided in a surface at an opposite side to the mounting surface  102 P of the second support  102 . With such a structure, the hydrogen-containing water generating electrode  10  is mounted to and supported by the second support  102  through the positive-electrode support member  18  and the negative-electrode support member  19 . Note that the second support  102  also supports the protection member  103 , in addition to the first support  101 . 
     As described above, both end portions of the hydrogen-containing water generating electrode  10  and the protection member  103  in the longitudinal direction are respectively supported by the first support  101  and the second support  102 . The hydrogen-containing water generating device  100  reliably supports the hydrogen-containing water generating electrode  10  and the protection member  103  from both sides in the longitudinal direction, and can be of a firm structure. 
     A first support  101   a  included in a hydrogen-containing water generating device  100   a  illustrated in  FIG. 34  includes a mounting seat  101 Ba, a tubular side-portion-side cover  101 CSa, and a plate-like cover  101 CBa. The mounting seat  101 Ba does not include the tubular member  101 IW, which is included in the mounting seat  101 B illustrated in  FIG. 32 . Therefore, the first support  101   a  does not include the first opening portion  101 H, which is included in the first support  101  illustrated in  FIG. 32 . The positive-electrode power feed member  14 , the negative-electrode power feed member  15 , the terminals  34 , and the wiring  25  are arranged in a first-support-member inner space  101 SPa surrounded by the mounting seat  101 Ba, the side-portion-side cover  101 CSa, and the cover  101 CBa. A waterproof agent is filled in the first-support-member inner space  101 SPa. Other structures of the first support  101   a , and a relationship with the hydrogen-containing water generating electrode  10  are similar to those of the first support  101  illustrated in  FIG. 32 . The second support  102  illustrated in  FIG. 33  is applied to the hydrogen-containing water generating device  100   a  as it is. 
     The wiring  25  is connected with the power source  20  through a connector  27 . The power source  20  is, for example, a secondary battery, and is a lead storage battery in the present embodiment. The power source  20  includes a control panel  21 . The control panel  21  includes a control device (for example, a microcomputer)  21 C, a power source switch  22 , and a display device  23 . The display device  23  is, for example, a single or a plurality of light-emitting diodes or a liquid crystal display panel. The power source  20  can be connected with an alternative current (AC) adaptor  24  for charging. When the power source switch  22  is turned ON, power is applied from the power source  20  to the hydrogen-containing water generating electrode  10 , and the hydrogen-containing water generating electrode  10  performs electrolysis of the raw water W to generate the hydrogen-containing water. In the present embodiment, the control device  21 C automatically stops the supply of the power when a predetermined time (for example, about 10 to 20 minutes) has passed from when the power source switch  22  is turned ON. In this way, when especially the hydrogen-containing water generating device  100  is put in a bath, and warm water containing hydrogen is generated, continuous supply of the power after the bathing is completed can be avoided. Therefore, the power consumption of the power source  20  can be suppressed. 
     The AC adaptor  24  converts an alternative current into a direct current to charge the power source  20 . In the present embodiment, the hydrogen-containing water generating device  100  generates the hydrogen-containing water with the direct-current power supplied from the power source  20 . However, for example, the hydrogen-containing water generating device  100  can generate the hydrogen-containing water with the direct-current power supplied from the AC adaptor  24 . In this case, for example, the control device  21 C switches the supply of the power to the hydrogen-containing water generating electrode  10  between the supply from the power source  20  and the supply from the AC adaptor  24 . 
     The display device  23  displays timing to charge the power source  20 , timing to wash or conduct maintenance of the hydrogen-containing water generating electrode  10 , and the like. When it becomes the timing to charge the power source  20 , a control device  20 C blinks a charging notification lamp included in the display device  23 , and when it becomes the timing for washing, the control device  20 C blinks a washing notification lamp included in the display device  23 . In doing so, a user of the hydrogen-containing water generating device  100  can recognize the timing of charging and washing. 
     When the connector  27  connected with the wiring  25  is pulled out of the power source  20  or when the hydrogen-containing water generating device  100  is pulled up from the raw water W, the control device  21 C stops an output of the power from the power source  20 , that is, causes the power source switch  22  to be in an OFF state. For example, when the current flowing in the hydrogen-containing water generating electrode  10  becomes a predetermined value or less, or 0, the control device  21 C stops the output of the power from the power source  20 . This is because, when the hydrogen-containing water generating electrode  10  is pulled up from the water, no raw water W exists between the positive electrode  11  and the negative electrode  12 , and as a result, the current flowing in the hydrogen-containing water generating electrode  10  becomes the predetermined value or less, or 0. Further, this is because, when the connector  27  is pulled out of the power source  20 , no current flows in the hydrogen-containing water generating electrode  10  through the wiring  25 . The control device  21 C can improve safety by controlling the output of the power of the power source  20 . 
     In the present embodiment, the AC adaptor  24  is connected with the power source  20  to charge the power source  20 . However, the charging of the power source  20  is not limited to such an embodiment. For example, the power source  20  may be charged by a non-contact charging system using electromagnetic induction. In doing so, waterproofing of the power source  20  and a charging device can be easily secured. Next, a modification of the hydrogen-containing water generating device  100  will be described. 
     (Modification) 
       FIGS. 35 to 37  are diagrams illustrating a modification of a hydrogen-containing water generating device according to the present embodiment. At the time of use of this hydrogen-containing water generating device  100   b , foldable and storable legs  104  are taken out of a second support  102   b , and are installed on an installing object FL. The leg  104  is, for example, a rod-like member rotating around a rotating shaft Zr provided at the installing object FL side of the second support  102   b , as illustrated in  FIG. 36 . The leg  104  is provided to each of both sides of the second support  102   b  in a width direction. When the hydrogen-containing water generating device  100   b  is not used, the legs  104  are stored in storages  106  provided at the installing object FL side of the second support  102   b . When the hydrogen-containing water generating device  100   b  is used, the legs  104  are taken out of the storages  106 , and rotated around the rotating shaft Zr. Then, end portions  104 S at an opposite side to the rotating shaft Zr come in contact with the installing object FL. 
     In doing so, the hydrogen-containing water generating device  100   b  is installed on the installing object FL with a first installation portion  101 C of a first support  101 , and the end portions  104 S of the legs  104 , as illustrated in  FIG. 37 . A second support  102   b  is more separated from the installing object FL with the legs  104 , than the first support  101 . Therefore, a hydrogen-containing water generating electrode  10  of the hydrogen-containing water generating device  100   b  is inclined with respect to a ground plane of the installing object FL such that, toward the second support  102   b  from the first support  101 , the hydrogen-containing water generating electrode  10  is separated from the ground plane of the installing object FL. At this time, an angle formed by a central axis Zt of the hydrogen-containing water generating electrode  10 , and the installing object FL (a virtual ground plane FLv in this example) is the above-described angle of inclination θ. 
     The hydrogen-containing water generating device  100   b  includes the storable legs  104  in the second support  102 . Therefore, the second support  102   b  and the first support  101  can be of the same shape, and thus common components can be employed. Further, since the legs  104  are just taken out at the time of use, the second support  102  can be of an equal dimension to the first support  101 . Therefore, the second support  102   b  can be made compact, and as a result, the hydrogen-containing water generating device  100   b  can be made compact. 
     As described above, the present embodiment has been described. However, the present embodiment is not limited by the above-described content. Further, the above-described configuration elements include those which can be conceived by a person skilled in the art, which are substantially the same, and so-called equivalents. Further, the above-described configuration elements can be appropriately combined. Further, various omissions, replacements, and changes of the configuration elements can be made without departing from the gist of the present embodiment. 
     REFERENCE SIGNS LIST 
       10 ,  10   a ,  10   b ,  10   c , and  10   d  Hydrogen-containing water generating electrode 
       10 R Curved surface portion 
       10 T 1  First end portion 
       10 T 2  Second end portion 
       10 HA and  10 HB End portion-side opening portion 
       11 ,  11   c , and  11   d  Positive electrode 
       11 H Opening 
       11 S Side portion 
       11 SL Slit 
       11 Si Inside portion 
       11 So Outside portion 
       11 T 1  and  12 T 1  First end portion 
       11 T 2  and  12 T 2  Second end portion 
       12 ,  12   c , and  12   d  Negative electrode 
       12 H Opening 
       12 S Side portion 
       12 SL Slit 
       12 Si Inside portion 
       12 So Outside portion 
       13 ,  13   c , and  13   d  Insulator 
       13 H Opening 
       14  Positive-electrode power feed member 
       15  Negative-electrode power feed member 
       20  Power source 
       21 C Control device 
       22  Power source switch 
       23  Display device 
       24  AC adaptor 
       25  Wiring 
       27  Connector 
       34  Terminal 
       100 ,  100   a , and  100   b  Hydrogen-containing water generating device 
       101  First support 
       101 H First opening portion 
       101 C First installation portion 
       102  Second support 
       102 H Second opening portion 
       102 C Second installation portion 
       103  Protection member 
       104  Leg 
     FL Installing object 
     W Raw water