Patent Publication Number: US-2018036534-A1

Title: Wearable device having low-frequency generation function, and health care system  using the same

Description:
TECHNICAL FIELD 
     The present invention relates to a wearable device having a low frequency generation function and a health care system using the same, and more particularly, to a wearable device having a low frequency generation function and a health care system using the same capable of effectively preventing nausea and vomiting due to motion sickness, morning sickness, drugs, or the like by transmitting a low frequency to the median nerve of the wrist. 
     BACKGROUND ART 
     In general, morning sickness experienced by pregnant women usually appears in the early stage of pregnancy, and the cause thereof is known as an increase in a placenta-secreted hormone (HCG) or mental anxiety or stress due to pregnancy. The morning sickness usually appears as syndromes such as vomiting, sickness, nausea, anorexia, and a change in the taste of food, but normally, most of the symptoms disappear within 5 months. 
     According to a survey of the morning sickness experience of the pregnant women, the experience or relief of morning sickness varies according to age, first or easy childbirth, the presence of occupation, education levels, income levels, and residences of the pregnant women, and the experienced symptoms also vary according to the stress or family composition due to pregnancy and gender of the birth. 
     Due to the morning sickness, the pregnant women become more susceptible to smell, and thus, preference for certain foods is decreased or appetite disappears, and as a result, food intake is irregular and a body weight is reduced. Further, when vomiting is worse, the body may lose moisture or minerals and become dehydrated in some cases. Since this may have negative effects on the development and nutritional status of the fetus as well as a fear of pregnancy or other mental conflicts, clinical and nutritional management need to be performed when morning sickness becomes severe. 
     The solution for alleviating symptoms of morning sickness has mainly used oriental medicine, medicines, or intravenous injection. Vitamin B6 is administered to alleviate symptoms of pregnant women with severe vomiting and nausea. However, drug abuse, including these supplements, may cause undesirable results for the fetus, like drinking or smoking, and drug prescriptions need to be used restrictively under the supervision of a physician. 
     Also, referring to Korean Patent Laid-Open Publication No. 2001-0032517, although not an apparatus for treating morning sickness, there is disclosed a treatment apparatus for treating vomiting and nausea by applying a low frequency current to a body. Such a conventional treatment apparatus is in the form of one apparatus and includes an oscillator for oscillating a low frequency and a treatment electrode connected to the oscillator and transmitting the low frequency oscillated from the oscillator to the body. However, in such a conventional treatment apparatus, since the oscillator and the treatment electrode are individually provided, the oscillator and the treatment electrode are generally installed in a designated place such as a hospital, because the size is large. 
     However, whenever the pregnant woman shows symptoms of morning sickness such as vomiting or nausea, it is practically impossible to use conventional treatment apparatus by visiting the hospital promptly. As a result, it is difficult to treat the morning sickness using the conventional treatment apparatus. Therefore, it is urgent to develop a therapeutic apparatus that enables the oscillator and the treatment electrode to be integrally portable and can be easily used. 
     On the other hand, recently, portable wearable devices have been excitedly released based on large companies. Most of these wearable devices measure the user&#39;s momentum to show the calories consumed during a day, or measure the user&#39;s pulse to provide a motion guide. In addition, such wearable devices measure bio-signals such as a pulse and a body temperature, analyze the bio-signals, and provide a function of notifying health problems to the user. 
     However, these wearable devices have only a function of simply measuring the bio-signals such as a pulse and a body temperature and notifying the bio-signals to the outside, but have no separate function to alleviate symptoms of morning sickness such as vomiting and nausea. As a result, there has been a continuous need to add a function for alleviating symptoms of morning sickness such as vomiting and nausea to the portable wearable devices. 
     DISCLOSURE 
     Technical Problem 
     The present invention is directed to provide a wearable device having a low frequency generation function and a health care system using the same capable of effectively preventing nausea and vomiting due to motion sickness, morning sickness, drugs, or the like by allowing a portable wearable device to transmit a low frequency to the median nerve of the wrist. 
     Further, the present invention is directed to provide a wearable device having a low frequency generation function and a health care system using the same capable of measuring user&#39;s bio-signals to allow a user or a protector to continuously monitor the bio-signals, thereby rapidly notifying a dangerous situation to the outside when the user is in the dangerous situation. 
     Technical Solution 
     One aspect of the present invention provides a wearable device having a low frequency generation function, in which the wearable device includes a main body provided on the wrist and embedded with a low frequency generating unit generating a low frequency; a wear control unit provided in the main body to control the low frequency generating unit to generate the low frequency; a belt member having a first belt connected to one side of the main body to surround one side of the outer periphery of the wrist and a second belt connected to the other side of the main body to surround the other side of the outer periphery of the wrist; a coupling member coupling the first belt and the second belt; and a treatment electrode unit provided to a portion of the coupling member facing the wrist and transmitting the low frequency generated by the low frequency generating unit to the wrist. 
     The coupling member may include a coupling guide portion coupled to the first belt and having the treatment electrode unit at the portion facing the wrist; a pair of coupling protrusions protruding from both sides of the coupling guide portion in a direction of the outer periphery of the second belt which is positioned to be stacked on the outer periphery of the first belt; and a coupling buckle hinge-coupled between the pair of coupling protrusions and rotating to press or not the outer periphery of the second belt which is positioned to be stacked on the outer periphery of the first belt. 
     The belt member may further include a sliding contact portion provided in an inner longitudinal direction of the first belt, positioned to be exposed to the outside along the inner periphery of the first belt, and electrically connected to the low frequency generating unit, and the coupling member may further include the coupling guide portion coupled to slide along the inner periphery of the first belt; a pair of hinge coupling portions provided between the coupling guide portion and the coupling protrusion to face the outer periphery of the first belt; and a fixing buckle hinge-coupled between the pair of hinge coupling portions and rotating to press or not the outer periphery of the first belt, and the treatment electrode unit may include an electrode portion positioned at the coupling guide portion and a contact portion protruding from the electrode portion in the sliding contact portion direction by penetrating the coupling guide portion. 
     A pair of treatment electrode units may be configured and a pair of sliding contact portions may be configured to contact the treatment electrode units, respectively. 
     The treatment electrode unit may be positioned to face the median nerve of the wrist. 
     A measuring unit measuring biometric information of the user may be provided inside the main body facing the wrist. 
     An output unit outputting various kinds of data to the outside may be further included outside the main body positioned at an opposite side to the wrist, and the wear control unit may output the biometric information measured by the measuring unit to the output unit. 
     The measuring unit may measure a pulse of the wrist or a body temperature of the wrist. 
     A pedometer may be provided in the main body. 
     Another aspect of the present invention provides a health care system using the wearable device having a low frequency generation function, in which the health care system includes the wearable device having a low frequency generation function including the wear control unit receiving the biometric information from the measuring unit and a first short-range communication unit receiving health information data including the biometric information from the wear control unit to output the received health information data to the outside through a first wireless communication network; a first terminal including a second short-range communication unit connected wirelessly to the first wireless communication network and receiving the health information data from the first short-range communication unit, a first long-range communication unit outputting the health information data to the outside through a second wireless communication network, and a first control unit controlling the first long-range communication unit to output the health information data received from the second short-range communication unit to the outside; and a second terminal including a second long-range communication unit connected wirelessly to the second wireless communication network and receiving the health information data from the first long-range communication unit, a terminal output unit outputting the health information data received from the second long-range communication unit to the outside, and a second control unit controlling the terminal output unit to output the health information data received from the second long-range communication unit to the outside. 
     The first wireless communication network may be configured by a wireless communication network using Bluetooth and the second wireless communication network may be configured by a mobile communication network including any one selected from a 2G network, a 3G network, and a 4G network (an LTE network). 
     Any one control unit selected from the wear control unit, the first control unit, and the second control unit may store a safe range for the biometric information and generate a warning message when the biometric information deviates from the safe range, and the warning message may be included in the health information data. 
     The terminal output unit may include a speaker outputting the warning message as a sound or a vibration unit outputting the warning message as a vibration, or a display unit outputting the warning message as an image. 
     Advantageous Effects 
     According to the present invention, it is possible to easily transmit a low frequency generated from the low frequency generating unit provided in the wearable device having the low frequency generation function, thereby efficiently preventing nausea and vomiting due to motion sickness, morning sickness, or drugs. 
     Further, since the coupling member of the wearable device having the low frequency generation function slides along the first belt, the coupling member may be positioned to face the median nerve of the wrist, thereby allowing the treatment electrode unit provided in the coupling member to easily transmit the low frequency to the median nerve of the wrist. Further, the coupling member positioned to face the median nerve of the wrist is configured to be fixed to the first belt by rotating the fixing buckle to press the first belt, thereby firmly fixing the coupling member while being positioned to face the median nerve of the wrist. 
     Further, in the present invention, the wearable device having the low frequency generation function is configured to measure the biometric signal of the user and notify the biometric signal to the user or the protector as well as transmit the low frequency to the median nerve of the wrist, thereby continuously monitoring the health condition of the user by the user or the protector and rapidly notifying a dangerous situation to the outside when the user is in the dangerous situation. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIG. 1  is a diagram schematically illustrating a wearable device having a low frequency generation function according to a preferred embodiment of the present invention. 
         FIG. 2  is a diagram schematically illustrating a state in which a first belt is coupled to a sliding contact portion of a belt member in the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
         FIG. 3  is a diagram schematically illustrating a state in which a coupling guide portion of a coupling member is slidably coupled to the first belt to the belt member in the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
         FIG. 4  is a diagram for describing a state in which a treatment electrode unit is coupled to the coupling member in the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
         FIG. 5  is a diagram schematically illustrating a state in which the coupling member is fixed to the first belt in the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
         FIG. 6  is a cross-sectional view illustrating a state in which the coupling member is fixed to the first belt in the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
         FIG. 7  is a diagram schematically illustrating a state in which a second belt is stacked on the first belt in the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
         FIG. 8  is a cross-sectional view illustrating a state in which a coupling buckle is fixed to the second belt in the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
         FIG. 9  is a diagram schematically illustrating a health care system using a wearable device having a low frequency generation function according to a preferred embodiment of the present invention. 
         FIG. 10  is a block diagram schematically illustrating the wearable device having the low frequency generation function of  FIG. 9 . 
         FIG. 11  is a diagram schematically illustrating a display unit included in the wearable device having the low frequency generation function of  FIG. 9 . 
         FIG. 12  is a block diagram schematically illustrating a first terminal in the health care system using the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
         FIG. 13  is a block diagram schematically illustrating a second terminal in the health care system using the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
         FIG. 14  is a schematic flowchart for describing the health care system using the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
     
    
    
     MODES OF THE INVENTION 
     Hereinafter, a wearable device having a low frequency generation function according to a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings. 
       FIG. 1  is a diagram schematically illustrating a wearable device having a low frequency generation function according to a preferred embodiment of the present invention. 
     Referring to  FIG. 1 , a wearable device  100  having a low frequency generation function according to a preferred embodiment of the present invention is formed in a shape such as a watch worn on the wrist as a whole and includes a main body  110 , a measuring unit  122  (illustrated in  FIG. 2 ), a low frequency generating unit  121  (illustrated in  FIG. 10 ), a belt member  130 , a coupling member  140 , and a treatment electrode unit  150 . 
     The main body  110  is positioned on the user&#39;s wrist and formed in a similar shape to a wristwatch. In addition, a measuring unit  122  is provided inside the main body  110  which is in contact with the wrist and an output unit  125  is provided outside the main body  110  which is not in contact with the wrist. The output unit  125  is configured by, for example, a liquid crystal display (LCD) for displaying an image, and will be described in detail with reference to  FIG. 11  below. 
     The measuring unit  122  is provided inside the main body  110  to measure biometric information of the user such as blood pressure, pulse rate, and body temperature. The measuring unit  122  includes, for example, a pulse measuring unit  122   a  for measuring the pulse of the user and a body temperature measuring unit  122   b  for measuring the body temperature of the user. The pulse measuring unit  122   a  may include an optical type that detects a pulse wave signal using light, a piezoelectric type that measures a pulse wave signal using pressure, and the like. In the optical type, the pulse measuring unit  122   a  is mounted on the inside of the main body  110  and irradiates light to the user&#39;s body to measure the user&#39;s pulse. The body temperature measuring unit  122   b  is configured by, for example, an infrared sensor and detects infrared rays emitted from the user and generates an electric pulse signal according to the detected infrared rays to measure the body temperature of the user. Since the low frequency generating unit  121 , the pulse measuring unit  122   a , and the body temperature measuring unit  122   b  described above are well known in the art, the more detailed description thereof will be omitted. In addition, the biometric information measured by the measuring unit  122  is transmitted to the outside to manage the health condition of the user, and this will be described below with reference to  FIGS. 9 to 14 . 
     The low frequency generating unit  121  is provided in the main body  110  and oscillates an electromagnetic pulse in a range of frequencies using an oscillation coil or the like. The low frequency generating unit  121  generates low frequency pulses of approximately 28 Hz to 33 Hz, and the generated low frequency pulses are transmitted to the treatment electrode unit  150  to be described below. 
     The belt member  130  is similar to a wrist strap that fixes the main body  110  to be positioned on the wrist, and may be formed of a flexible material so as to be easily bent depending on the shape of the wrist. The belt member  130  includes a first belt  132  connected to one side of the main body  110  to surround one side of the outer periphery of the wrist and a second belt  136  connected to the other side of the main body  110  to surround the other side of the outer periphery of the wrist. 
     The coupling member  140  couples the first belt  132  and the second belt  136  of the belt member  130  to each other and for example, couples the second belt  136  while coupling the first belt  132  to be positioned at the median nerve of the wrist. 
     The treatment electrode unit  150  is provided inside the coupling member  140  facing the median nerve of the wrist and includes a first electrode unit  152  and a second electrode unit  154 . The first and second electrode units  152  and  154  are in contact with the median nerve of the wrist and are electrically connected to the low frequency generating unit  121  through a sliding contact portion  134  (illustrated in  FIG. 2 ) to be described below. Accordingly, the treatment electrode unit  150  receives a low frequency generated by the low frequency generating unit  121  and transmits the received low frequency to the median nerve of the wrist again. In addition, the low frequency transmitted to the median nerve of the wrist stimulates the median nerve and then is transmitted to the central nervous system along the median nerve. Then, the central nervous system intercepts signals of nausea and vomiting and transmits stimulation to normally operate the abnormal gastrointestinal motility again. 
     Meanwhile, since the treatment electrode unit  150  needs to be in contact with the median nerve of the wrist, the coupling member  140  to which the treatment electrode unit  150  is coupled needs also to be positioned to face the median nerve of the wrist. However, since the size of the wrist differs from person to person, the coupling member  140  needs to be positioned to be slidable along the first belt  132 , and when the coupling member  140  sliding along the first belt  132  is positioned at the median nerve of the wrist, the coupling member  140  is fixed to the first belt  132  so that the coupling member  140  no longer slides. This will be described in detail with reference to  FIG. 5  below. 
       FIG. 2  is a diagram schematically illustrating a state in which a first belt is coupled to a sliding contact portion of a belt member in the wearable device having the low frequency generation function according to the preferred embodiment of the present invention and  FIG. 3  is a diagram schematically illustrating a state in which a coupling guide portion of a coupling member is slidably coupled to the first belt to the belt member in the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
     Referring to  FIGS. 2 and 3 , the belt member  130  further includes a sliding contact portion  134  in addition to the first belt  132  and the second belt  136 . The sliding contact portion  134  is elongated in an inner longitudinal direction of the first belt  132  and includes a first sliding portion  134   a  and a second sliding portion  134   b  to make a pair. The first and second sliding portions  134   a  and  134   b  are made of a conductive material and one longitudinal side thereof is electrically connected to the low frequency generating unit  121  in the main body  110  and the other longitudinal side thereof is elongated in the median nerve direction of the wrist. In addition, when the first and second sliding portions  134   a  and  134   b  are inserted into the first belt  132 , and when the first belt  132  is coupled to surround the first and second sliding portions  134   a  and  134   b , first and second openings  132   a  and  132   b  are formed on the inner periphery of the first belt  132  so that the first and second sliding portions  134   a  and  134   b  are exposed to the outside. 
     The coupling member  140  includes a coupling guide portion  142 , a coupling protrusion  144 , a coupling buckle  146 , a hinge coupling portion  145 , and a fixing buckle  148 . The coupling guide portion  142  is positioned so as to be slidable along the inner periphery of the first belt  132  and the treatment electrode unit  150  is provided inside the coupling guide portion  142  facing the wrist. In addition, when the coupling guide portion  142  slides along the inner periphery of the first belt  132 , a pair of support guide portions  143  are formed to protrude along both sides of the coupling guide portion  142  so as to guide both sides of the first belt  132 . In addition, the fixing buckle  148  presses the outer periphery of the first belt  132  to fix the coupling guide portion  142  sliding along the inner periphery of the first belt  132  so as to face the median nerve of the wrist, and the coupling buckle  146  presses the outer periphery of the second belt  136  so that the second belt  136  is fixed to the coupling guide portion  142 . 
     That is, in the present invention, in addition to the coupling buckle  146  fixing the second belt  136  to the first belt  132 , a fixing buckle  148  is separately provided so that the coupling guide portion  142 , which slides along the inner periphery of the first belt  132 , is fixed to the first belt  132 . The coupling protrusion  144 , the coupling buckle  146 , the hinge coupling portion  145 , and the fixing buckle  148  will be described in detail with reference to  FIGS. 5 to 8  below. 
       FIG. 4  is a diagram for describing a state in which the treatment electrode unit is coupled to the coupling member of the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
     Referring to  FIG. 4 , the treatment electrode unit  150  includes a first electrode unit  152  and a second electrode unit  154 . The first electrode unit  152  and the second electrode unit  154  are coupled to each other inside the coupling guide portion  142  in parallel. The first electrode unit  152  includes a first electrode  152   a  provided inside the coupling guide portion  142  and a first contact portion  152   b  electrically contacting the first sliding portion  134   a  of the sliding contact portion  134  by penetrating the coupling guide portion  142  at the first electrode  152   a . The second electrode unit  154  includes a second electrode  154   a  provided in parallel with the first electrode  152   a  inside the coupling guide portion  142  and a second contact portion  154   b  electrically contacting the second sliding portion  134   b  of the sliding contact portion  134  by penetrating the coupling guide portion  142  at the second electrode  154   a.    
     The first electrode  152   a  and the second electrode  154   a  are in contact with the median nerve of the wrist and formed concavely along the wrist, and may be plated with gold or the like so as to increase the conductivity and lower the resistance to the human body. The first contact portion  152   b  and the second contact portion  154   b  are configured to slide along the first sliding portion  134   a  and the second sliding portion  134   b . When the coupling guide portion  142  slides along the inner periphery of the first belt  132  to be positioned on the median nerve of the wrist, the first contact portion  152   b  and the second contact portion  154   b  are also configured to slide along the first sliding portion  134   a  and the second sliding portion  134   b  so that the first electrode  152   a  and the second electrode  154   a  are easily positioned on the median nerve of the wrist. In addition, since the first sliding portion  134   a  and the second sliding portion  134   b  are connected to the low frequency generating unit  121  in the main body  110 , the low frequency generated by the low frequency generating unit  121  is transmitted to the first electrode unit  152  and the second electrode unit  154 , and the first electrode unit  152  and the second electrode unit  154  transmit the transmitted low frequency to the median nerve of the wrist again. In addition, the low frequency transmitted to the median nerve of the wrist stimulates the median nerve and then is transmitted to the central nervous system along the median nerve. Then, the central nervous system intercepts signals of nausea and vomiting and transmits stimulation to normally operate the abnormal gastrointestinal motility again. 
     As such, in the present invention, the low frequency generated from the low frequency generating unit  121  in the main body  110  can be easily transmitted to the median nerve of the wrist, thereby effectively preventing nausea and vomiting as side effects of anticancer therapy and chemotherapy. In addition, the present invention has an effect of effectively preventing nausea and vomiting due to motion sickness, morning sickness, or the like. 
       FIG. 5  is a diagram schematically illustrating a state in which the coupling member is fixed to the first belt in the wearable device having the low frequency generation function according to the preferred embodiment of the present invention and  FIG. 6  is a cross-sectional view illustrating a state in which the coupling member is fixed to the first belt in the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
     Referring to  FIGS. 5 and 6 , the coupling member  140  includes a coupling guide portion  142 , a coupling protrusion  144 , a coupling buckle  146 , a hinge coupling portion  145 , and a fixing buckle  148 . 
     The coupling guide portion  142  is positioned to be slidable along the inner periphery of the first belt  132 . In addition, a support guide portion  143  is formed to protrude along both sides of the coupling guide portion  142 . 
     A pair of coupling protrusions  144  are formed, and when the second belt  136  is positioned to be stacked on the outer periphery of the first belt  132 , the coupling protrusions  144  protrude in a direction far away from the main body  110  at both sides of the coupling guide portion  142 , particularly, sides of a pair of support guide portions  143  which are positioned to be close to the end of the first belt  132  so that the leading end of the coupling protrusions  144  is provided in the outer periphery direction of the second belt  136 . 
     The coupling buckle  146  is hinge-coupled between the pair of coupling protrusions  144  and rotates so as to press or not to press the outer periphery of the second belt  136  positioned to be stacked on the outer periphery of the first belt  132 . The coupling buckle  146  will be described with reference to  FIG. 7  below. 
     A pair of hinge coupling portions  145  are configured and formed in a through-hole shape between each coupling guide portion  142  and each coupling protrusion  144  to face the outer periphery of the first belt  132 , particularly, between each support guide portion  143  and each coupling protrusion  144 . 
     The fixing buckle  148  is positioned to be spaced apart from the coupling guide portion  142  and the first belt  132  is inserted between the coupling guide portion  142  and the fixing buckle  148 . In addition, one end of the fixing buckle  148  is hinge-coupled between the pair of hinge coupling portions  145  so that the other end of the fixing buckle  148  rotates in a direction closing to the first belt  132  or in a direction far away from the first belt  132 . To this end, fixing hinge protrusions  148   a  are formed at both sides of one end of the fixing buckle  148  so as to be inserted into the hinge coupling portions  145  and axially coupled. In addition, when the other end of the fixing buckle  148  rotates in the direction of the first belt  132 , a fixed pressing portion  149  is formed on one end of the fixing buckle  148  in a direction perpendicular to the first belt  132  and the fixed pressing portion  149  is configured to press the outer periphery of the first belt  132 . As such, the fixed pressing portion  149  of the fixing buckle  148  presses the first belt  132  so that the coupling guide portion  142  is firmly fixed to the first belt  132 . On the other hand, when the fixing buckle  148  rotates in the direction far away from the first belt  132 , the fixed pressing portion  149  of the fixing buckle  148  is positioned in the horizontal direction to the first belt  132 , the fixed pressing portion  149  does not press the first belt  132  any more, so that the coupling guide portion  142  is slidable along the first belt  132 . 
     As such, in the present invention, since the coupling member  140  slides along the first belt  132 , the coupling member  140  may be positioned to face the median nerve of the wrist, and as a result, the treatment electrode unit  150  provided in the coupling member  140  may easily transmit a low frequency to the median nerve of the wrist. Further, the coupling member  140  positioned to face the median nerve of the wrist is configured to be fixed to the first belt  132  by rotating the fixing buckle  148  to press the first belt  132 , and as a result, the coupling member  140  is firmly fixed while being positioned to face the median nerve of the wrist. 
       FIG. 7  is a diagram schematically illustrating a state in which a second belt is stacked on the first belt in the wearable device having the low frequency generation function according to the preferred embodiment of the present invention and  FIG. 8  is a cross-sectional view illustrating a state in which a coupling buckle fixes the second belt in the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
     Referring to  FIGS. 7 and 8 , while the fixing buckle  148  presses the first belt  132  so that the coupling guide portion  142  is fixed to the first belt  132 , the second belt  136  covers the wrist, and then positioned to be staked on the first belt  132 . At this time, the second belt  136  is inserted between the fixing buckle  148  and the coupling buckle  146  to be described below. 
     The coupling buckle  146  is positioned to be spaced apart from the fixing buckle  148  and the second belt  136  is inserted between the fixing buckle  148  and the coupling buckle  146 . In addition, one end of the coupling buckle  146  is hinge-coupled between the pair of coupling protrusions  144  so that the other end of the coupling buckle  146  rotates in a direction closing to the second belt  136  or in a direction far away from the second belt  136 . To this end, coupling hinge holes  146   a  are formed at both sides of one end of the coupling buckle  146  so as to be inserted into the hinge protrusions  144   a  formed on the coupling protrusion  144  and axially coupled thereto. In addition, when the other end of the coupling buckle  146  rotates in the direction of the second belt  136 , a coupling pressing portion  147  is formed to protrude from one end of the coupling buckle  146  in a direction perpendicular to the second belt  136  and the coupling pressing portion  147  is configured to press the outer periphery of the second belt  136 . As such, the coupling pressing portion  147  of the coupling buckle  146  presses the second belt  136  so that the second belt  136  is firmly fixed to the coupling member  140 . On the other hand, when the coupling buckle  146  rotates in the direction far away from the second belt  136 , since the coupling pressing portion  147  of the coupling buckle  146  is positioned in the horizontal direction to the second belt  136 , the coupling pressing portion  147  does not press the second belt  136  any more, so that the second belt  136  is configured to be detached from the coupling member  140  to the outside. 
     As such, in the present invention, the coupling buckle  146  firmly fixes the second belt  136  inserted between the fixing buckle  148  and the coupling buckle  146 , and as a result, the first belt  132  and the second belt  136  are firmly fixed to the wrist of the user while being coupled to the coupling member  140  and the main body  110  connected with the first and second belts  132  and  136  are also firmly fixed to the wrist. 
     Hereinafter, a health care system using a wearable device having a low frequency generation function according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. 
       FIG. 9  is a diagram schematically illustrating a health care system using a wearable device having a low frequency generation function according to a preferred embodiment of the present invention,  FIG. 10  is a block diagram schematically illustrating the wearable device having the low frequency generation function of  FIG. 9 , and  FIG. 11  is a diagram schematically illustrating a display unit included in the wearable device having the low frequency generation function of  FIG. 9 . 
     Referring to  FIGS. 9 to 11 , a health care system using a wearable device having a low frequency generation function according to a preferred embodiment of the present invention includes a wearable device  100 , a first terminal  200 , and a second terminal  300  so as to manage a user&#39;s health or rapidly notify a dangerous situation to a protector. 
     The wearable device  100  includes a managing means  120  for managing the health of the user and notifying biometric information of the user to the outside. The managing means  120  is provided in the main body  110  and includes a low frequency generating unit  121 , a measuring unit  122 , a pedometer  123 , an input unit  124 , an output unit  125 , a first short-range communication unit  126  and a wear control unit  127 . 
     The low frequency generating unit  121  generates a low frequency to transmit the low frequency to the treatment electrode unit  150 . The measuring unit  122  includes a pulse measuring unit  122   a  and a body temperature measuring unit  122   b  and the pulse measuring unit  122   a  measures biometric information such as a pulsation or a pulse wave of the user to transmit the biometric information to the wear control unit  127 . The body temperature measuring unit  122   b  measures a body temperature of the user to transmit the body temperature to the wear control unit  127 . Since the low frequency generating unit  121  and the measuring unit  122  are described above, the detailed description thereof will be omitted. 
     The pedometer  123  generally checks the momentum of the user by measuring the number of steps of the user. The pedometer  123  is provided in the main body  110  and measures the momentum of the user by counting impacts generated from the outside, such as acceleration or vibration. Momentum information measured by the pedometer  123  is transmitted to the wear control unit  127 . 
     The input unit  124  receives from the user various control signals required for controlling the low frequency generating unit  121 , the measuring unit  122  or the pedometer  123 , for example, a start signal, an end signal, an initialization signal, a storage signal, a setting signal, and the like, to transmit the received control signals to the wear control unit  127 . In addition, the wear control unit  127  receives the control signals to control the low frequency generating unit  121 , the measuring unit  122  or the pedometer  123 . The input unit  124  may be formed in a keypad shape on the outside of the main body  110  or may be formed in a touch screen shape by attaching a touch panel to the output unit  125 . 
     The output unit  125  is provided outside the main body  110  and may include an LCD, an OLED, or the like. The output unit  125  displays various characters, images, numbers, and the like under the control of the wear control unit  127 . For example, the output unit  125  may include a first display unit  125   a  displaying time, a second display unit  125   b  displaying momentum information measured by the pedometer  123 , a third display unit  125   c  displaying pulse biometric information measured by the pulse measuring portion  122   a , and a fourth display unit  125   d  displaying body temperature biometric information measured by the body temperature measuring portion  122   b . In addition, the output unit  125  may include a main speaker (not illustrated) that outputs a sound to the outside. 
     The first short-range communication unit  126  is configured to transmit the momentum information measured by the pedometer  123 , the pulse biometric information measured by the pulse measuring unit  122   a , the body temperature biometric information measured by the body temperature measuring unit  122   b , to the first terminal  200  carried by the user through a first wireless communication network  400 . The first wireless communication network  400  may be configured by a short-range communication network, for example, a Bluetooth, an infrared (IrDA), a wireless LAN (WLAN), or the like. 
     The wear control unit  127  controls the input unit  124 , the low frequency generating unit  121 , the measuring unit  122 , the pedometer  123 , the output unit  125 , and the first short-range communication unit  126 . That is, when a low frequency control signal for generating the low frequency is input from the input unit  124 , the wear control unit  127  controls the low frequency generating unit  121  to generate the low frequency by transmitting the low frequency control signal to the low frequency generating unit  121 . In addition, when a measurement control signal for measuring the pulse, the body temperature, or the momentum is input from the input unit  124 , the wear control unit  127  controls the pulse measuring unit  122   a , the body temperature measuring unit  122   b , or the pedometer  123  to perform the measurement and outputs and displays the pulse biometric information measured by the pulse measuring unit  122   a , the body temperature biometric information measured by the body temperature measuring unit  122   b , or the momentum information measured by the pedometer  123 , to the output unit  125 . In addition, the wear control unit  127  stores a safe range for the pulse biometric information received from the pulse measuring unit  122   a  or the body temperature biometric information received from the body temperature measuring unit  122   b , and generates a warning message when the pulse biometric information or the body temperature biometric information deviates from the safe range. In addition, the wear control unit  127  generates health information data including the pulse biometric information or the body temperature biometric information and outputs the generated health information data to the first short-range communication unit  126  so that the first short-range communication unit  126  transmits the health information data to the first terminal  200 . At this time, when the wear control unit  127  generates a warning message, the wear control unit  127  includes the warning message in the health information data to control the health information data including the pulse biometric information or the body temperature biometric information and the warning message to be transmitted to the first terminal  200 . In addition, the wear control unit  127  transmits the warning message to the main speaker so that the user or the persons around the user may easily determine the health condition of the user. 
     Meanwhile, in one embodiment of the present invention, the wear control unit  127  is configured to generate the warning message, but it is natural that the present invention is not limited thereto. In some cases, while the pulse biometric information or the body temperature biometric information is transmitted to a first control unit  230  or a second control unit  330  to be described below, the first control unit  230  or the second control unit  330  may also generate a warning message when the pulse biometric information or the body temperature biometric information deviates from the safe range. 
       FIG. 12  is a block diagram schematically illustrating a first terminal in the health care system using the wearable device having the low frequency generation function according to the preferred embodiment of the present invention and  FIG. 13  is a block diagram schematically illustrating a second terminal in the health care system using the wearable device having the low frequency generation function according to the preferred embodiment of the present invention. 
     Referring to  FIGS. 12 and 13 , the first terminal  200  includes a PDA, a mobile phone, a smart phone, and the like as a portable terminal carried by the user, and includes a second short-range communication unit  210 , a first long-range communication unit  220  and a first control unit  230 . The second short-range communication unit  210  is connected with the first wireless communication network  400  to wirelessly access the first short-range communication unit  126  of the wearable device  100  having the low frequency generation function. The first long-range communication unit  220  is connected with a second wireless communication network  410  to wirelessly access a second long-range communication unit  310  of the second terminal  300  to be described below. The second wireless communication network  410  may be a long-range wireless communication network, and may include at least one of a WiBro network and a mobile communication network. The mobile communication network includes at least one of a 2 generation (2G) network, a 3G network, and a 4G (long term evolution, LTE) network. The first control unit  230  is connected to the second short-range communication unit  210  so that the first short-range communication unit  126  receives the health information data including the pulse biometric information or the body temperature biometric information and the warning message transmitted to the second short-range communication unit  210 . Further, the first control unit  230  controls the health information data to be transmitted to the second terminal  300  through the first long-range communication unit  220 . 
     The second terminal  300  is configured by a PDA, a mobile phone, a smart phone, etc. like the first terminal  200 , as a portable terminal managed by a protector of a user, a doctor, and the like. The second terminal  300  includes a second long-range communication unit  310 , a terminal output unit  320 , and a second control unit  330 . The second long-range communication unit  310  is connected with the second wireless communication network  410  to wirelessly access the first long-range communication unit  220  of the first terminal  200 . The terminal output unit  320  may include an LCD, a terminal speaker, a vibration unit, and the like provided in the second terminal  300 . The terminal output unit  320  displays various kinds of information to the outside or outputs sound or vibration. Under the control of the second control unit  330 , the terminal output unit  320  displays various characters, images, numbers and the like to the outside or outputs the sound or vibration. For example, a pulsation value of the pulse biometric information, a body temperature value of the body temperature biometric information, a warning message, and the like, which are included in the health information data, are displayed as letters or numbers, or output as sounds. The second control unit  330  is connected to the second long-range communication unit  310  so that the first long-range communication unit  220  receives the health information data including the pulse biometric information or the body temperature biometric information and the warning message transmitted to the second long-range communication unit  310  and controls the health information data to be output to the terminal output unit  320 . 
       FIG. 14  is a schematic flowchart for describing the health care system using the wearable device having the low frequency function according to the preferred embodiment of the present invention. 
     Referring to  FIG. 14 , the measuring unit  122  of the wearable device  100  having the low frequency generation function measures biometric information such as a user&#39;s pulse or body temperature and transmits the measured biometric information to the wear control unit  127  (S 100 ). The wear control unit  127  determines whether the biometric information transmitted from the measuring unit  122  deviates from the safe range (S 110 ). For example, the wear control unit  127  determines whether the pulse biometric information transmitted from the pulse measuring unit  122   a  of the measuring unit  122 , that is, a heart rate deviates from the safe range of 60 to 100 Bpm. Alternatively, the wear control unit  127  determines whether the body temperature biometric information transmitted from the body temperature measuring unit  122   b  of the measuring unit  122 , that is, a body temperature deviates from the safe range of 30 to 40° C. In step S 110 , the wear control unit  127  generates a warning message when the biometric information transmitted from the measuring unit  122  deviates from the safe range (S 120 ). The warning message may be configured by “I am a cancer patient.”, “I am a cardiac patient”, or “please help me”, so as to notify a dangerous situation of the user to the protector or neighboring persons of the user. Thereafter, the wear control unit  127  may control to output the warning message to the main speaker and notify a current dangerous situation of the user to the neighboring persons of the user. Thereafter, the wear control unit  127  generates health information data including the pulse biometric information and the body temperature biometric information of the user, and the warning messages and transmits the health information data to the first short-range communication unit  126  to control the first short-range communication unit  126  to transmit the health information data to the second short-range communication unit  210  of the first terminal  200 . Meanwhile, in step S 110 , when the biometric information transmitted from the measuring unit  122  does not deviate from the safe range, the wear control unit  127  generates health information data including the pulse biometric information and the body temperature biometric information of the user and transmits the health information data to the first short-range communication unit  126  to control the first short-range communication unit  126  to transmit the health information data to the second short-range communication unit  210  of the first terminal  200 . 
     Thereafter, the first control unit  230  of the first terminal  200  determines whether the health information data is received from the second short-range communication unit  210  (S 200 ). In addition, the first control unit  230  transmits the health information data to the first long-range communication unit  220  and controls the first long-range communication unit  220  to transmit the health information data to the second long-range communication unit  310  of the second terminal  300  (S 210 ). 
     Thereafter, the second control unit  330  of the second terminal  300  determines whether the health information data is received from the second long-range communication unit  310  (S 300 ). In addition, when the health information data is received from the second long-range communication unit  310 , the second control unit  330  determines whether a warning message is included in the health information data (S 310 ). In step S 310 , if the warning message is included in the health information data, the second control unit  330  controls the terminal output unit  320  to output the biometric information in the health information data, and then controls the terminal output unit  320  to output the warning message in the health information data. Meanwhile, in step S 310 , if the warning message is not included in the health information data, the second control unit  330  controls the terminal output unit  320  to output the biometric information in the health information data. 
     As such, in the present invention, the wearable device  100  having the low frequency generation function is configured to measure the biometric signal of the user and notify the biometric signal to the user or the protector as well as transmit the low frequency to the median nerve of the wrist, thereby continuously monitoring the health condition of the user by the user or the protector and rapidly notifying a dangerous situation to the outside when the user is in the dangerous situation. 
     While the present invention has been particularly shown and described with reference to embodiments thereof, it is natural that the present invention is not limited thereto and it will be understood by those skilled in the art that various changes and modifications may be made within the technical idea of the present invention as defined by the appended claims and the technical idea belongs to the scope of the claims.