Patent Publication Number: US-9836900-B2

Title: Binding device with embedded smart key and method for controlling object using the same

Description:
PRIORITY 
     This application claims priority under 35 U.S.C. §119(a) to a Korean Patent Application filed in the Korean Intellectual Property Office on May 18, 2015, and assigned Serial No. 10-2015-0068739, the entire contents of which are incorporated herein by reference. 
     BACKGROUND 
     1. Field of the Disclosure 
     The present disclosure generally relates to a binding device with an embedded smart key. 
     2. Description of the Related Art 
     In recent years, attention has been made to smart keys capable of sensing and authenticating a target object through bidirectional communication with the target object, e.g., a vehicle. Controlling an authenticated target object has also received increasing attention. 
     SUMMARY 
     The present disclosure has been made to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the present disclosure provides a binding device having a smart key therein to enhance the portability and in-use efficiency of the smart key. 
     Another aspect of the present disclosure provides a binding device including a communication circuit for communication with an external electronic device connected to the binding device. 
     In accordance with an aspect of the present disclosure, a binding device is provided that includes a strap including a body, a first area formed inside the body, with a smart key related control circuit disposed in the first area, and a second area formed on one side of the body, with a battery for supplying electric power for operating the smart key related control circuit seated on the second area such that at least a portion of the battery is exposed, and a cover formed to cover the second area. 
     In accordance with a further aspect of the present disclosure, there is provided a method for controlling a target object of a binding device, with the method including transmitting a sensing signal for sensing the target object through a first antenna that transmits and receives a signal in a specific frequency band, with the first antenna provided in a smart key related control circuit disposed inside a strap of the binding device; receiving an authentication signal comprising authentication information of the target object through the first antenna in response to the sensing signal; authenticating the target object based on the authentication information contained in the authentication signal; and transmitting a control signal for controlling the target object through the first antenna. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features, and advantages of certain embodiments of the present disclosure will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: 
         FIG. 1A  is a plan view of a binding device according to an embodiment of the present disclosure; 
         FIG. 1B  is a perspective view of a part of the binding device according to an embodiment of the present disclosure; 
         FIG. 1C  is a side view of a part of the binding device illustrated in  FIG. 1B ; 
         FIG. 2  illustrates a circuit of a smart key having a binding device therein according to an embodiment of the present disclosure; 
         FIG. 3  is a block diagram of components of the smart key according to an embodiment of the present disclosure; 
         FIG. 4A  is a plan view of a part of a strap, illustrating a form in which the smart key is embedded in the binding device according to an embodiment of the present disclosure; 
         FIG. 4B  is a side view of a part of the strap illustrated in  FIG. 4A ; 
         FIG. 5A  is a perspective view of a part of the binding device illustrating a form in which the smart key is embedded in a binding part of the binding device according to an embodiment of the present disclosure; 
         FIG. 5B  is a side view of a part of the binding device illustrated in  FIG. 5A ; 
         FIG. 5C  is a side view illustrating opening of the binding part of the binding device of  FIG. 5A ; 
         FIG. 6A  is a perspective view of the binding device illustrating another manner in which the smart key is embedded in the binding device according to an embodiment of the present disclosure; 
         FIG. 6B  is a perspective view of the binding device illustrating still another manner in which the smart key is embedded in the binding device according to an embodiment of the present disclosure; 
         FIG. 7  illustrates a circuit of the smart key disposed in a restricted area according to an embodiment of the present disclosure; 
         FIG. 8  illustrates circuits of the smart key disposed differently depending on the type of circuit boards according to an embodiment of the present disclosure; 
         FIG. 9  illustrates interworking of the smart key with an external electronic device according to an embodiment of the present disclosure; 
         FIG. 10  is a flowchart of an operating method of the smart key according to an embodiment of the present disclosure; and 
         FIG. 11  is a flow diagram illustrating interworking of the smart key with an external electronic device according to an embodiment of the present disclosure. 
     
    
    
     Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures. 
     DETAILED DESCRIPTION OF THE EMBODIMENTS OF THE PRESENT DISCLOSURE 
     Herein, embodiments of the present disclosure are described with reference to the accompanying drawings. Accordingly, those of ordinary skill in the art will recognize that modification, equivalent, and/or alternative on the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. 
     In the present disclosure, it should be understood that the terms “have”, “may have”, “include”, “comprise”, “may include” and “may comprise” indicate existence of corresponding features, e.g., elements such as numeric values, functions, operations, or components, but do not exclude presence of additional features. 
     In the present disclosure, expressions “A or B”, “at least one of A or/and B”, or “one or more of A or/and B”, and the like include any and all combinations of one or more of the associated listed items. For example, the term “A or B”, “at least one of A and B”, or “at least one of A or B” may refer to each of when (1) at least one A is included, (2) at least one B is included, and (3) both of at least one A and at least one B are included. 
     Although ordinal terms, such as “first” and “second” may be used to describe various elements of the present disclosure, such terms do not limit these elements. Rather, the terms are used merely to distinguish an element from another element and do not limit the order and/or priority of the elements. For example, a first user device and a second user device may represent different user devices irrespective of sequence or importance, and a first element may be referred to as a second element and a second element may be referred to as a first element, without departing the scope of the present disclosure. 
     It will be understood that when an element (e.g., a first element) is referred to as being “(operatively or communicatively) coupled with/to” or “connected to” another element (e.g., a second element), such element can be directly coupled with/to or connected to the other element or an intervening element (e.g., a third element) that may be present. In contrast, when an element (e.g., a first element) is referred to as being “directly coupled with/to” or “directly connected to” another element (e.g., a second element), it should be understood that there is no intervening element (e.g., a third element). 
     According to the situation, the expression “configured to” may be used interchangeably with, for example, “suitable for”, “having the capacity to”, “designed to”, “adapted to”, “made to”, or “capable of”. The term “configured or set to” does not mean that a component is only “specifically designed to” function with certain hardware. Instead, the expression “a device is configured to” may mean that the device is “capable of” operating together with another device or one or more other components. A central processing unit (CPU), for example, includes a “processor configured to (or set to) perform A, B, and C”, and can include a dedicated processor (e.g., an embedded processor) for performing a corresponding operation or a generic-purpose processor (e.g., a CPU or an application processor) which can perform corresponding operations by executing one or more non-transitory software programs which are stored in a memory device. 
     Terms used herein to describe specified embodiments of the present disclosure are not intended to otherwise limit the scope of the present disclosure. The terms of a singular form may also include plural forms unless otherwise specified. Unless otherwise defined herein, the terms used herein that include technical or scientific terms may have the same meaning that is generally understood by a person skilled in the art. It will be further understood that terms, which are defined in a dictionary and commonly used, should also be interpreted as is customary in the relevant related art and not in an idealized or overly formal manner, unless expressly so defined herein in embodiments of the present disclosure. In some cases, even terms defined herein are not to be interpreted to exclude embodiments of the present disclosure. 
     An electronic device according to an embodiment of the present disclosure may include at least one of smartphones, tablet personal computers (PCs), mobile phones, video telephones, electronic book readers, desktop PCs, laptop PCs, netbook computers, workstations, servers, personal digital assistants (PDAs), portable multimedia players (PMPs), MP3 players, mobile medical devices, cameras, and wearable devices. Wearable devices may include accessories (for example, watches, rings, bracelets, ankle bracelets, glasses, contact lenses, or head-mounted devices (HMDs)), clothing-integrated devices (for example, electronic clothing), body-attached devices (for example, skin pads or tattoos), or implantable devices (for example, implantable circuits). 
     In an embodiment of the present disclosure, the electronic device may be a home appliance, and may include, for example, at least one of a digital video disk (DVD) player, an audio player, a refrigerator, an air conditioner, a cleaner, an oven, a microwave oven, a washing machine, an air cleaner, a set-top box, a home automation control panel, a security control panel, a TV box (for example, Samsung HomeSync™, Apple TV™, or Google TV™), a game console (for example, Xbox™ or PlayStation™), an electronic dictionary, an electronic key, a camcorder, and an electronic panel. 
     In another embodiment of the present disclosure, the electronic device includes a medical device, e.g., a portable medical measurement device (e.g., a blood glucose meter, a heart rate measuring device, a blood pressure measuring device, and a body temperature measuring device), a magnetic resonance angiography (MRA) device, a magnetic resonance imaging (MRI) device, a computed tomography (CT) device, a photographing device, and an ultrasonic device), a navigation system, a global navigation satellite system (GNSS), an event data recorder (EDR), a flight data recorder (FDR), a vehicular infotainment device, electronic devices for vessels (for example, a navigation device for vessels and a gyro compass), an avionics device, a security device, a vehicular head unit, an industrial or home robot, an automatic teller machine (ATM) of a financial institution, a store point of sale (POS) device, or an Internet of Things (IoT) device (for example, a light bulb, various sensors, an electricity or gas meter, a spring cooler device, a fire alarm device, a thermostat, an electric light post, a toaster, a sporting apparatus, a hot water tank, a heater, a furnace and a boiler). 
     According to an embodiment of the present disclosure, the electronic device includes at least one of furniture or a part of a building/structure, an electronic board, an electronic signature receiving device, a projector, or various measurement devices (for example, a water service, electricity, gas, or electric wave measuring device). In an embodiment of the present disclosure, the electronic device may be one or a combination of the aforementioned devices. The electronic device according to an embodiment of the present disclosure may be a flexible electronic device. Further, the electronic device is not limited to the aforementioned existing devices, and may include new electronic devices produced after or based on such technologies. 
     Hereinafter, electronic devices will be described with reference to the accompanying drawings. The term “user” refers to a person who uses an electronic device or may refer to a device (for example, an artificial intelligence electronic device) that uses an electronic device. 
       FIG. 1A  is a plan view of a binding device according to an embodiment of the present disclosure.  FIG. 1B  is a perspective view of a part of the binding device according to the embodiment of the present disclosure.  FIG. 1C  is a side view of a part of the binding device illustrated in  FIG. 1B . 
     Referring to  FIGS. 1A to 1C , the binding device includes a strap  100  and a cover  145 . The strap  100  has a body and a binder, i.e. a binding part. The strap  100  has an opening  110  such that a main body of an external electronic device, for example, a smart watch, may be attached to and detached from the body of the strap  100 . The opening  110  is provided in a predetermined area (for example, a central area) of the body. The opening  110  has a shape and a size that are the same as or similar to a corresponding opening of the external electronic device. According to an embodiment, the strap  100  may have a groove having a predetermined form at a periphery of the opening  110  to support and fix the external electronic device. 
     The strap  100  has a first band  130  extending from the opening  110  in a first direction by a predetermined length, and a second band  150  extending from the opening  110  in a second direction different from the first direction by a predetermined length. As an example, the second band  150  is connected to a surface of the periphery of the opening  110  that is opposite to the surface where the first band  130  and the opening  110  meet, and extends in a direction opposite to the first band  130  by a predetermined length. According to an embodiment, the second band  150  may be omitted from the strap  100 , with opposite peripheries of the first band  130  connected to the opening  110 . The first band  130  and the second band  150  provide band-shaped supports that surround a part of the body of the user. The first band  130  or the second band  150  may be formed of rubber, plastic, leather, or metal. According to an embodiment of the present disclosure, the strap  100  may be configured such that the first band  130  and the second band  150  are divided with respect to the opening  110 , with a connector that functions a connection function of the external electronic device provided at at least one periphery of the first band  130  and the second band  150 . 
     A first area  143  in which a smart key related control circuit is disposed is provided inside the first band  130 . The first area  143  is a hollow or an empty space in which, for example, a circuit board (for example, a first circuit board  137  or a second circuit board  139 ), a control chip  133 , and a first antenna  135  are disposed. At least a portion of the first area  143  is connected to a second area  141 . For example, a lower surface of the second area  141  is connected to the first area  143  such that a battery  131  is connected to the circuit board. 
     The first band  130  includes a second area  141  in which the battery  131  is seated. The second area  141  is a hollow or an empty space with, for example, a shape and a size that correspond to the shape and size of the battery  131 . The second area  141  is a hollow or an area that is recessed from one side surface of the first band  130  by a predetermined depth such that the battery  131  is seated thereon. At least one groove or at least one bump  147  is formed in a predetermined portion of a side wall of the second area  141  to be coupled to the cover  145 . 
     According to an embodiment of the present disclosure, a third area in which at least a portion of the control circuit is disposed is formed inside the second band  150 . For example, at least some of the constituent elements of the control circuit are disposed in the third area, and the constituent elements of the control circuit disposed in the first area  143  are connected to the constituent elements of the control circuit disposed in the third area through at least one connection circuit disposed inside the strap  100 . 
     At least one of the first band  130  and the second band  150  of the strap  100  has a binder in a predetermined area of an opposite periphery of the surface thereof connected to the opening  110 . For example, a first binder  170  is provided in a predetermined area of an opposite periphery of the surface where the first band  130  meets the opening  110 , and a second binder  190  is provided in a predetermined area of an opposite periphery of the surface where the second band  150  meets the opening  110 . The first binder  170  and the second binder  190  are paired to be connected to each other such that the first band  130  and the second band  150  are connected to each other to be fixed to a part of the body of the user. According to an embodiment, the first binder  170  and the second binder  190  may be physically connected to each other, with the first binder  170  being a hook, and the second binder  190  being a fixing unit having a hole. The first binder  170  and the second binder  190  may be magnetically connected to each other, with the first binder  170  and the second binder  190  including corresponding magnetic and ferrous materials. According to an embodiment, the first binder  170  and the second binder  190  may also be buckles. As another example, the first binder  170  and the second binder  190  may be fixedly connected to each other. 
     The cover  145  covers the second area  141 . For example, the cover  145  covers the second area such that the battery seated on the second area  141  is not shift outside of the cover  145 . The cover  145  has a shape and a size that are the same as or similar to those of the second area  141 . The cover may have at least one bump or at least one groove  149  to be coupled to the second area  141  of the strap  100 . For example, at least a portion of the cover  145  may be inserted into the second area  141  of the strap  100  while being engaged with the second area  141  of the strap  100 , and if a pressure having a predetermined magnitude is applied to the cover  145  in a designated direction, the cover  145  may be coupled and fixed by the bump  147  formed in the strap  100  and the groove  149  formed in the cover  145 . 
     According to an embodiment, the cover  145  may be disposed such that a separation preventing unit (for example, a rubber ring) of a specific material (for example, rubber) is adjacent to the groove  149 . According to an embodiment of the present disclosure, the cover  145  may be coupled while protruding to the outside of the strap  100 , and may also be coupled while being flat with any one surface of the strap  100  or recessed inwards. The cover  145  may include a spring or may be connected to a spring to be opened and closed in a push button type arrangement. 
       FIG. 2  illustrates a circuit of a smart key having a binding device therein according to an embodiment of the present disclosure. 
     Referring to  FIG. 2 , the smart key circuit is configured such that a first part  230  of a first antenna, a second part  250  of the first antenna, a control chip  270 , a battery  290 , and the like are disposed on a circuit board  210 . The circuit board  210  may be provided as at least one rigid printed circuit board (RPCB) or at least one flexible printed circuit board (FPCB). 
     The first part  230  of the first antenna and the second part  250  of the first antenna are spaced apart from each other by a predetermined distance, with the first antenna  135  may be classified in the x-axis, y-axis, and z-axis directions. For example, when the first part  230  of the first antenna is formed in the x-axis and y-axis directions, the second part  250  of the first antenna is formed in the z-axis direction. The first antenna is an antenna for transmitting a sensing signal to a target object (for example, a vehicle) and receiving an authentication signal from the target object. The first antenna may be a low frequency (LF) antenna. 
     The control chip  270  performs communication and calculation of data for sensing, authenticating, and controlling the target object. The control chip  270  includes a second antenna for near field communication (NFC) with the target object, and a processor. The processor may control, for example, transmission of a sensing signal for sensing the target object, and if an authentication signal is received from the target object, the target object may be authenticated. The processor may control transmission of a control signal for controlling the authenticated object. The second antenna may be an antenna for transmitting a control signal to the target object and receiving a feedback signal about the control signal from the target object. For example, the second antenna may be a radio frequency (RF) antenna. 
     According to an embodiment of the present disclosure, the control chip  270  includes a transmitter for transmitting a signal to the target object and a receiver for receiving a signal from the target object. Alternatively, the control chip  270  may have the first part  230  of the first antenna and the second part  250  of the first antenna in one chip. 
     According to an embodiment of the present disclosure, the first antenna may transmit and receive a signal having a low frequency band relative to the second antenna. Furthermore, the first antenna may be sensitive to interference from the second antenna. Accordingly, the first antenna may be disposed distant from an opening (for example, the opening  110  of  FIG. 1 ) relative to the second antenna. According to an embodiment, the first antenna may be omitted, and the second antenna may replace the first antenna. 
     The battery  290  may function as the power source of the constituent elements disposed on the circuit board  210 . Although a structure in which the constituent elements of the smart key circuit are disposed only on one surface of the circuit board  210  is illustrated in the drawings, in alternative embodiments of the present disclosure the constituent elements may be disposed on opposite surfaces of the circuit board  210 . Furthermore, the battery  290  may be disposed on the left side of the first antenna or may be disposed between the first antenna and the control chip  270 . The smart key circuit may further include a control circuit such as a filter or a switch. 
     According to an embodiment of the present disclosure, at least one additional constituent element is disposed on the circuit board  210 , in addition to the aforementioned constituent elements. For example, the smart key circuit further includes a communication chip for communication with the external electronic device, for example, a smart watch that is inserted into and connected to the opening. According to an embodiment, the smart key circuit further includes a Bluetooth low energy (BLE) based communication chip. Furthermore, the smart key circuit may include additional sensors. For example, the smart key circuit may include a live body sensor, a gesture sensor, a voice sensor, a global positioning system (GPS) sensor, or a touch sensor. 
       FIG. 3  is a block diagram of components of the smart key according to an embodiment of the present disclosure. 
     Referring to  FIG. 3 , the smart key  300  may include a processor  310 , a communication interface  330 , a first antenna  350 , a second antenna  370 , and a battery  390 . The processor  310  controls the constituent elements included in the smart key  300  to sense, authenticate, and control a target object. For example, the processor  310  controls transmission of a sensing signal using the first antenna  350 , based on the communication interface  330 . According to an embodiment, the processor  310  controls transmission of sensing signals having a designated frequency band at a designated time interval. The processor  310  receives an authentication signal detected by the first antenna  350  based on the communication interface  330 , and authenticates a target object using the received authentication signal. 
     According to an embodiment of the present disclosure, the processor  310  controls transmission of a control signal for controlling the authenticated object using the second antenna  370 , based on the communication interface  330 . According to an embodiment, the processor  310  controls transmission of a control signal regarding, for example, opening and closing of a locker of a target object (for example, opening and closing of a door of a vehicle or opening and closing of an entrance gate), or initiation and completion of a specific function of a target object (for example, turning on and off of a starter of a vehicle or turning on and off of a light lamp). 
     According to an embodiment of the present disclosure, the processor  310  transmits authentication information about a target object or a control signal to the external electronic device (for example, the body of a smart watch) using at least one of the first antenna  350 , the second antenna  370 , or an additional third antenna, based on the communication interface  330 . In this case, the smart key  300  provides an interface with the user using a display included in the external electronic device. 
     The communication interface  330  establishes communication between the smart key  300  and a target object or between the smart key  300  and the external electronic device. For example, the communication interface  330  communicates with a target object or an external electronic device through wired or wireless communication. According to an embodiment, the communication interface  330  performs low frequency (LF) communication with a target object using the first antenna  350 . The communication interface  330  may perform RF communication with a target object by using the second antenna  370 . In an embodiment of the present disclosure, the communication interface  330  performs Bluetooth low energy (BLE) communication with a target object or an external electronic device, using at least one of the first antenna  350 , the second antenna  370 , or an additional third antenna. 
     The antenna  350  transmits a sensing signal to a target object and receives an authentication signal from the target object. The second antenna  370  transmits a control signal to a target object and receives a feedback signal from the target object. According to an embodiment, the first antenna  350  and the second antenna  370  are configured to transmit and receive signals of different frequency bands. According to an embodiment of the present disclosure, the smart key  300  further includes at least one antenna (for example, a third antenna), in addition to the first antenna  350  and the second antenna  370 . 
     The battery  390  supplies electric power for operating the constituent elements included in the smart key  300 . The battery  390  may be, for example, a coin cell battery. In an embodiment of the present disclosure, the battery  390  includes a rechargeable battery and/or a solar battery. For example, the battery  390  may be charged when an external voltage is applied to the battery  390 . According to an embodiment, the smart key  300  may acquire electric power from a battery connected to the external electronic device (for example, the body of a smart watch). Furthermore, the smart key  300  supplies minimum electric power for controlling a target object by acquiring electric power from at least one of a battery connected to the external electronic device or an internal battery of the external electronic device when the power level of the battery  390  is low. Even when the power level of the battery  390  is low, the smart key  300  can start up a vehicle utilizing electric power from an internal battery of the external electronic device, i.e., the smart watch. 
       FIG. 4A  is a plan view of a part of a strap, illustrating a form in which the smart key is embedded in the binding device according to an embodiment of the present disclosure.  FIG. 4B  is a side view of a part of the strap illustrated in  FIG. 4A . 
     Referring to  FIGS. 4A and 4B , the strap  400  of the binding device is configured such that a smart key is embedded in a specific band  401 , i.e., the first band  130  or the second band  150  ( FIG. 1 ). The specific band may be constructed from a bendable material. Furthermore, the specific band may have different bending degrees according to the materials or thicknesses thereof. According to an embodiment, the band may be constructed of different materials or thicknesses according to its distances from an opening (for example, the opening  110  of  FIG. 1 ). For example, as the specific band becomes closer to the opening, the content of a rigid material may become larger or the thickness of the material may become thicker. Accordingly, the constituent elements of the smart key are disposed on the rigid printed circuit board at a location close to the opening, and the constituent elements of the smart key are disposed on the flexible printed circuit board at a location distant from the opening. 
     According to an embodiment of the present disclosure, the specific band is configured such that the circuit board  410  constitutes one of a flexible printed circuit board and a plurality of flexible printed circuit boards, disposed between the constituent elements included in the smart key to connect the constituent elements. As illustrated in  FIG. 4A , a plurality of flexible printed circuit boards (for example, a first flexible printed circuit board  411  and a second flexible printed circuit board  413 ) are disposed between the constituent elements (for example, the battery  430 , the control chip  450 , and the first antenna  470 ) included in the smart key to connect the constituent elements. In this case, the constituent elements may be disposed in different rigid printed circuit boards. For example, the battery  430  may be disposed on the first rigid printed circuit board  415 , the control chip  450  may be disposed on the second rigid printed circuit board  417 , and the first antenna  470  may be disposed on the third rigid printed circuit board  419 , respectively. 
     According to an embodiment of the present disclosure, at least one of the constituent elements included in the smart key may be separated from the strap  400 . For example, the battery  430  may be separated from the strap  400  for replacement of the battery  430 . In this case, the strap  400  may have a battery area (for example, the second area  141  of  FIG. 1 ) having a predetermined size therein such that the battery  430  is seated on the specific band. The battery area is an empty space having a shape and a size that are the same as or similar to those of the battery  430  on at least one of the opposite surfaces of the specific band such that the battery  430  can be discharged to the outside for replacement. The strap  400  is coupled to a battery cover  490  (for example, the cover  145  of  FIG. 1 ) that covers the battery area such that the battery  430  is not undesirably discharged (separated) to the outside. 
     As illustrated in  FIG. 4B , the battery cover  490  is coupled to and protrudes outside of the strap  400 . The battery cover  490  has a groove of a predetermined shape at an inner periphery thereof to be smoothly separated from the strap  400 , and a separation preventing unit (for example, a rubber ring) may be disposed adjacent to the groove. Although the drawings show the battery cover  490  externally protruding from the strap  400 , the battery cover  490  may be flush with or recessed inwards from a one surface of the strap  400 . The battery cover  490  may include a spring or may be connected to a spring for push button type opening and closing. 
       FIG. 5A  is a perspective view of a part of the binding device illustrating a form in which the smart key is embedded in a binding part of the binding device according to an embodiment of the present disclosure.  FIG. 5B  is a side view of a part of the binding device illustrated in  FIG. 5A .  FIG. 5C  is a side view illustrating opening of the binding part of the binding device of  FIG. 5A . 
     Referring to  FIGS. 5A to 5C , the strap (for example, the strap  100  of  FIG. 1 ) of the binding device has a binder (for example, at least one of the first binder  170  or the second binder  190  of  FIG. 1 ) in a predetermined area of a periphery opposite to the surface, and an opening (for example, the opening  110  of  FIG. 1 ) meets a specific band (at least one of the first band  130  or the second band  150  of  FIG. 1 ). The binder may be a buckle of a predetermined size that fixes the band to a part of the body of the user. 
     As illustrated in  FIG. 5A , the binder may be configured such that an upper cover  510  is folded with a lower support layer  521  and an extension layer  523 . For example, the lower support layer  521  may be connected to the extension layer  523  through a first coupling  551 , and may be folded with respect to the first coupling  551 . Furthermore, the extension layer  523  may be connected to the upper cover  510  through a second coupling  555 , and may be folded with respect to the second coupling  555 . Through this, the upper cover  510 , the extension layer  523 , and the lower support layer  521  may be folded. A first hook  531  and a second hook  533  engage with each other when the upper cover  510 , the extension layer  523 , and the lower support layer  521  are folded, and maintain the engaging state until a force of a designated magnitude is applied in a designated direction. According to an embodiment of the present disclosure, the upper cover  510  and the lower support layer  521  may be connected to the specific band through a third coupling  553  and a fourth coupling  557 . 
     According to an embodiment of the present disclosure, the smart key may be embedded in the binder. The smart key is embedded in the upper cover  510 . For example, the battery  571 , the control chip  573 , the first antenna  575 , and the like are embedded in the upper cover  510  on a circuit board  570 . As another example, the upper cover  510  is coupled to the battery cover  590  that has a battery area (for example, the second area  141  of  FIG. 1 ) such that the battery  571  is separated and covers the battery area. As illustrated in  FIG. 5B , the battery cover  590  is coupled to and externally protrudes from the upper cover  510 , and in another embodiment of the present disclosure, the battery cover  590 , when coupled, is flat with an outer surface of the upper cover  510  or is inwardly recessed. 
     According to an embodiment of the present disclosure, as illustrated in  FIG. 5C , the upper cover  510  is configured such that an upper layer  511  and a lower layer  513  are connected to each other through a fifth connector  559 , forming an angle in a predetermined range with respect to the fifth connector  559  so that a predetermined area thereof may be separated or coupled thereto. In this case, at least one of the constituent elements (for example, the battery  571 , the control chip  573 , and the first antenna  575 ) of the smart key embedded in the upper cover  510  may be separated from the upper cover  510  for replacement. 
     According to an embodiment of the present disclosure, the binder may have various other forms, for example, at least one of the constituent elements of the binder may be omitted, or at least one constituent element may be added. 
       FIG. 6A  is a perspective view of the binding device illustrating another manner in which the smart key is embedded in the binding device according to an embodiment of the present disclosure.  FIG. 6B  is a perspective view of the binding device illustrating still another manner in which the smart key is embedded in the binding device according to an embodiment of the present disclosure. 
     Referring to  FIGS. 6A and 6B , the strap (for example, the strap  100  of  FIG. 1 ) of the binding device is configured such that the smart key circuit is constituted by one flexible printed circuit board therein. For example, the strap has an opening  610  in a predetermined area (for example, a central area), and has a specific band  630  connected to the opening  610  and extending from the opening  610  by a designated length in a designated direction. In this case, the control chip  651 , the battery, the first antenna  653 , and the like are disposed in the flexible printed circuit board  650  to be embedded in the specific band  630 . The form in which the constituent elements of the smart key are disposed in the flexible printed circuit board  650  occupies a wide area relative to the form in which the constituent elements are disposed in the rigid printed circuit board and are connected to each other by a plurality of flexible printed circuit boards disposed between the constituent elements. Accordingly, the sequence, the locations, and the intervals of the constituent elements may be diversified. 
     As illustrated in  FIG. 6A , in the specific band  630 , the control chip  651 , the battery, and the first antenna  653  are sequentially disposed on the flexible printed circuit board  630  by a predetermined interval with respect to the opening  610 .  FIG. 6B  illustrates a form in which the battery, the control chip  651 , and the first antenna  653  are sequentially disposed in the specific band  630  with respect to the opening  610 . Even in this case, the first antenna  653  are disposed distant from the opening  610  relative to the other constituent elements, according to the interference sensitivity thereof. 
     According to an embodiment of the present disclosure, the battery may be separated from the specific band  630 . In this case, the specific band  630  has a battery area (for example, the second area  141  of  FIG. 1 ) such that the battery is seated on the battery area. Furthermore, the battery cover  670  that prevents separation of the battery is coupled to the specific band  630 . The battery cover  670  is coupled to at least one of the opposite surfaces of the specific band  630 . For example, as illustrated in  FIG. 6A , the battery cover  670  is coupled to a surface opposite to a side on which the strap is bent and rolled inwards (for example, a surface opposite to one of the opposite surfaces of the specific band  630  that makes contact with a part of the body of the user). Alternatively, as illustrated in  FIG. 6B , the battery cover  670  is coupled to a side on which the strap is bent and rolled inwards (for example, one of the opposite surfaces of the specific band  630  that makes contact with a part of the body of the user). The strap is fixed by the binder  690  while surrounding a part of the body of the user. 
     According to an embodiment of the present disclosure, the smart key is not limited to only being embedded in the binding device, and may be disposed in the body of an external electronic device, for example, a smart watch that is inserted into and connected to the opening  610 . For example, at least a portion of the smart key circuit may be disposed in the body of the smart watch. 
     As described above, the form in which the smart key is embedded in the binding device enhances portability as compared with the form in which an independent device only for a smart key is provided. Further, it can reduce the size of an external electronic device as compared with the form in which the smart key is dependently disposed in the interior of the external electronic device, and accordingly, in-use efficiency can be enhanced. 
       FIG. 7  illustrates a circuit of the smart key disposed in a restricted area according to an embodiment of the present disclosure. 
     Referring to  FIG. 7 , the smart key circuit is disposed in a limited, i.e., restricted, area of a strap (for example, the strap  100  of  FIG. 1 ). For example, the smart key circuit is embedded in the buckle of the strap. Accordingly, in the smart key circuit, the constituent elements (for example, a first part  720  of the first antenna, a second part  730  of the first antenna, a transmitter  740 , a receiver  750 , and a battery  760 ) are disposed on opposite surfaces of the circuit board  710 . For example, the first part  720  of the first antenna, the second part  730  of the first antenna, and the battery  760  are disposed on an upper surface of the circuit board  710 , and the transmitter  740  and the receiver  750  are disposed on a lower surface of the circuit board  710 . In an embodiment of the present disclosure, the sequence, the locations, and the intervals of the constituent elements of the smart key may vary based on information about the interferences thereof and the sensitivities about the interferences of the constituent elements. 
       FIG. 8  illustrates circuits of the smart key disposed differently depending on the type of circuit boards according to an embodiment of the present disclosure. 
     Referring to  FIG. 8 , the constituent elements of the smart key circuit are disposed differently based on the circuit board type. For example, in the smart key circuit, all of the constituent elements may be disposed in one flexible printed circuit board, or one or more of the constituent elements may be disposed in different rigid printed circuit boards and one or more flexible printed circuit boards may be disposed between the rigid printed circuit boards such that the constituent elements are connected to each other. 
       FIG. 8  illustrates the smart key circuit disposed on at least one rigid printed circuit board and at least one flexible printed circuit board. For example, the first antenna, i.e., a first part  820  of the first antenna and a second part  830  of the first antenna, is disposed on a first rigid printed circuit board  811 , a transmitter  840  is disposed on a second rigid printed circuit board  812 , a receiver  850  is disposed on a third rigid printed circuit board  813 , and a battery  860  is disposed on a fourth rigid printed circuit board  814 . Furthermore, a first connector  815  connects the first rigid printed circuit board  811  and the second rigid printed circuit board  812 , a second connector  816  connects the second rigid printed circuit board  812  and the third rigid printed circuit board  813 , and a third connector  817  connects the third rigid printed circuit board  813  and the fourth rigid printed circuit board  814 . At least one or more than one of the first connector  815 , the second connector  816 , or the third connector  817  may be a flexible printed circuit board. According to an embodiment of the present disclosure, one or more of the constituent elements of the smart key circuit is disposed on a rigid printed circuit board, or is disposed on different surface of the same rigid printed circuit board. 
     As described above, according to an embodiment of the present disclosure, a binding device includes a strap including a body, a first area formed inside the body, with a smart key related control circuit disposed in the first area, and a second area formed on one side of the body, with a battery for supplying electric power for operating the smart key related control circuit is seated on the second area such that at least a portion of the battery is exposed, and a cover formed to cover the second area. 
     According to an embodiment of the present disclosure, the strap has at least one of a groove and a bump in a predetermined area of a side wall of the second area on which the battery is seated while making contact with the smart key related control circuit, and the cover has at least one of a bump and a groove in an area aligned with the predetermined area of the side wall to be coupled to the second area of the strap. 
     According to an embodiment of the present disclosure, at least one of the first area or the second area are formed in a binder of the strap. 
     According to an embodiment of the present disclosure, the binder includes an upper cover having an area having a predetermined size, and a lower support layer folded from the upper cover to support the upper cover, and the at least one of the first area or the second area formed inside the upper cover. 
     According to an embodiment of the present disclosure, the upper cover has an upper layer and a lower layer that form an angle in a designated range such that predetermined areas thereof are separated from or coupled to each other, and are formed such that at least a portion of the battery or at least a portion of the control circuit is exposed if the predetermined areas of the upper layer and the lower layer are separated from each other. 
     According to an embodiment of the present disclosure, the control circuit disposed in the first area is disposed on at least one of a rigid printed circuit board and a flexible printed circuit board, and includes at least one antenna that transmits and receives a signal in a specific frequency band. 
     According to an embodiment of the present disclosure, the control circuit disposed in the first area includes a first antenna that transmits and receives a signal in a first frequency band, and a sensing signal for sensing a target object is transmitted through the first antenna, an authentication signal including authentication information of the target object is received through the first antenna in response to the sensing signal, and a control signal for controlling the target object is transmitted through the first antenna. 
     According to an embodiment of the present disclosure, the control circuit includes a second antenna that transmits and receives a signal in a second frequency band different from the first frequency band of the first antenna, and the control signal is transmitted through the second antenna. 
     According to an embodiment of the present disclosure, the control circuit includes at least one of a communication circuit for communication with an external electronic device and a live body sensor for collecting biometric information. 
       FIG. 9  illustrates interworking of the smart key with an external electronic device according to an embodiment of the present disclosure. 
     Referring to  FIG. 9 , a smart key  910  is embedded in the strap (for example, the strap  100  of  FIG. 1 ) of the binding device, and the body of an external electronic device  950 , for example, a smart watch is connected to the opening (for example, the opening  110  of  FIG. 1 ) formed in the strap. The smart key  910  transmits a sensing signal in a specific frequency band at a designated time interval. For example, the smart key  910  transmits an LF signal containing sensing information using an LF antenna. Further, the smart key  910  receives an authentication signal in a specific frequency band from a target object  930 . For example, the smart key  910  receives an LF signal containing authentication information using an LF antenna. 
     According to an embodiment of the present disclosure, the smart key  910  authenticates the target object  930  by analyzing the authentication signal. For example, the smart key  910  extracts authentication information contained in the authentication signal, and identifies whether the extracted authentication information is the same as authentication information about the target object  930  stored in the smart key  910 . Based on a result of the identification of the extracted authentication information, the smart key  910  determines whether the target object  930  is an authenticated object. In this regard, the smart key  910  includes a memory for additionally storing the authentication information. Furthermore, the smart key  910  receives the authentication information from the external electronic device  950 . 
     According to an embodiment of the present disclosure, the smart key  910  transmits a control signal for controlling the authenticated object  930 . For example, the smart key  910  transmits an RF signal containing control information to the target object  930  using an RF antenna. According to an embodiment, the smart key  910  transmits a control signal regarding opening and closing of a lock of a target object, or initiation and completion of a specific function of the target object to the target object  930 . Furthermore, the smart key  910  receives a feedback signal about the control signal from the target object  930 . The feedback signal contains transmission result information about the control signal, and in an embodiment of the present disclosure, contains performance result information about the control signal. For example, when the control signal contains information for turning on a starter of a vehicle, the feedback signal contains transmission completion information about the control signal, startup state information of a vehicle, or information about the temperature of an engine, the power level of a battery, or a fuel level when the starter of the vehicle is turned on. In an embodiment of the present disclosure, the smart key  910  transmits the feedback signal to the external electronic device  950 . 
     According to an embodiment of the present disclosure, the smart key  910  also includes various sensors, e.g. a live body sensor, a gesture sensor, a voice sensor, a GPS sensor, or a touch sensor. According to an embodiment, the smart key  910  authenticates a user having authority to control the target object  930  based on the sensors. According to an embodiment, the smart key  910  collects biometric information of the user, for example, one of fingerprint information and iris information from the user, based on the live body sensor. Furthermore, the smart key  910  authenticates the user using biometric information collected based on the live body sensor. In relation to the authentication of the user, the smart key  910  collects biometric information (for example, fingerprint information) of users for user authentication from a memory included in the smart key  910 . In this regard, the smart key  910  receives biometric information registered by the users to be used in authentication and stores the received biometric information in the memory. Furthermore, the smart key  910  collects biometric information of the users used in user authentication from the external electronic device  950 . The smart key  910  transmits the biometric information, user authentication information authenticated using the biometric information and the like to the external electronic device  950 . Through this, the smart key  910  or the external electronic device  950  that authenticated the user obtains an authority for controlling the target object  930 . In addition, the smart key  910  collects information about blood pressure, blood flow rate, body temperature, user heart rate, and the like based on the live body sensors and transmits the information to the external electronic device  950 . 
     According to an embodiment of the present disclosure, the smart key  910  performs a control function of the target object  930  based on the sensors. According to an embodiment, the smart key  910  receives a user input based on the sensors, and performs a control function corresponding to the user input. For example, the smart key  910  analyzes gesture input information, voice information, location information, touch information, or the like collected based on the sensors, and performs a control function corresponding to the information. If the user inputs voice information (for example, “Start the engine”) designated by initiation of a specific function (for example, turning on of a starter of a vehicle) of the target object  930  to a voice sensor included in the smart key  910 , the smart key  910  analyzes the voice information and performs the corresponding control function. Further, when the user approaches the target object  930  while carrying (or wearing) the smart key  910 , the smart key  910  detects an approach of the smart key  910  to the target object  930  based on a GPS sensor included in the smart key  910  and performs a control function designated to be performed when the smart key  910  approaches the target object  930 , for example, a lock releasing function. In addition, the smart key  910  controls the target object  930  based on the sensors in various methods. For example, the smart key  910  detects a touch, a gesture, or a voice of the user based on the sensors, or when recognizing location information of the user, performs a designated control function regarding, for example, opening of a door of a vehicle, turning on the vehicle light, opening of a trunk, or automatic startup of the vehicle according to the corresponding information. 
     The target object  930  receives a sensing signal from the smart key  910 , and transmits an authentication signal containing authentication information of the target object  930  to the smart key  910 . The target object  930  includes constituent elements for a main function and peripheral functions of the target object  930 . For example, when the target object  930  is a vehicle, the vehicle includes a steering apparatus for a movement function of the vehicle, an accelerator, and various mechanical apparatuses. 
     The external electronic device  950  is provided as a body connected to the strap, and may be operated independently from the smart key  910  or may be operated in conjunction with the smart key  910 . According to an embodiment, the external electronic device  950  receives user authentication information from the smart key  910 . In this case, the external electronic device  950  authenticates the user based on the authentication information, and displays a control function list by which the target object  930  is controlled on a display when the user is authenticated. Furthermore, in response to selection of a specific control function item contained in the displayed control function list, the external electronic device  950  delivers the corresponding information to the smart key  910 , or directly delivers a control signal corresponding to a control function to the target object  930 . In this regard, the control function list includes at least one function item which the target object  930  performs. For example, when the target object  930  is a vehicle, the control function list includes a temperature control unit controlling function, a traffic situation information collecting function, or a vehicle state information providing function. 
     According to an embodiment, the external electronic device  950  performs a control function of the target object  930  based on various sensors included in the external electronic device  950 . According to an embodiment, the external electronic device  950  includes a gesture sensor or a touch sensor. In this case, if a specific user input (for example, a gesture input or a touch input) is received through the sensors, the external electronic device  950  performs a control function corresponding to the user input. Furthermore, the external electronic device  950  delivers at least one of the user input or information related to a control function corresponding to the user input to the smart key  910 . 
     According to an embodiment, in relation to a function of controlling the target object  930  based on the sensors, the external electronic device  950  may differently perform a control function of the target object  930  according to the received user input. According to an embodiment, the external electronic device  950  controls the target object  930  in stages according to the types, numbers, or times of the user inputs. For example, the external electronic device  950  performs control functions in stages in the input time sequence if a specific gesture input is repeatedly input for a designated time period at a predetermined time interval. According to an embodiment, a function of releasing a lock of the target object  930  is performed in a first step, and initiating a specific function (for example, turning on a starter or turning on a light) of the target object  930  is sequentially performed in second to fourth steps. For example, when the target object  930  is a vehicle, a driver side door is opened in the first step, the engine starter is turned on in the second step, front lights of the vehicle are turned on in the third step, and all interior lights of the vehicle are turned on in the fourth step. Furthermore, all of the vehicle doors are opened if a specific gesture input or a specific touch input is generated a designated number of times (for example, twice) within a predetermined time. The external electronic device  950  performs a control function in stages at a designated time interval from the predetermined time if a specific touch input is continuously input for a designated time period. 
     According to an embodiment, the external electronic device  950  receives a feedback signal from the smart key  910 . In this case, the external electronic device  950  displays information contained in the feedback signal on a display contained in the external electronic device  950 , which displays transmission result information about the control signal or performance result information about the control signal. 
     According to an embodiment, the external electronic device  950  analyzes information contained in the feedback signal, and performs a specific function according to the corresponding information. According to an embodiment, the external electronic device  950  performs a vibration alarm function if performance result information about initiation of a specific function of the target object  930  (for example, turning on of the vehicle) is received. Furthermore, the external electronic device  950  delivers information (for example, the engine temperature, the amount of fuel, or speed of the vehicle) together with initiation of a specific function to another external electronic device (for example, a smartphone of another passenger on the vehicle) connected to the target object  930 . 
     According to an embodiment, the smart key  910  may control another smart key having a control authority of the target object  930 . For example, the smart key  910  may control another smart key having authentication information of the users having a control authority about the target object  930 . According to an embodiment, the smart key  910  may perform a control function of the target object  930  through the other smart key. 
       FIG. 10  is a flowchart of an operating method of the smart key according to an embodiment of the present disclosure. 
     Referring to  FIG. 10 , a smart key (for example, the smart key  300  of  FIG. 3 ) transmits a sensing signal in operation  1010 . For example, the smart key transmits a sensing signal in a specific frequency band using a first antenna (for example, the first antenna  350  of  FIG. 3 ). 
     In operation  1030 , the smart key determines whether an authentication signal is received from a target object. For example, the smart key receives an authentication signal in a specific frequency band through the first antenna. When receiving the authentication signal, in operation  1050 , the smart key determines whether the target object is successfully authenticated based on the authentication signal. For example, the smart key extracts authentication information of the target object contained in the authentication signal, and compares the extracted authentication information with authentication information stored in the smart key or received from the external electronic device. When the two pieces of information are the same or are similar by at least a predetermined ratio, the smart key is determined to have successfully authenticated the target object. When an authentication signal is not received in operation  1030  or an authentication of the target object fails in operation  1050 , operation  1010  is repeated. 
     When the authentication of the target object is successful, in operation  1070 , the smart key controls the target object. For example, the smart key transmits to the target object a control signal to perform a function contained in the target object. 
       FIG. 11  is a flow diagram illustrating interworking of the smart key with an external electronic device, according to an embodiment of the present disclosure. 
     Referring to  FIG. 11 , in operation  1111 , the smart key  1110  transmits a sensing signal for sensing a target object  1130 . If the target object  1130  receives the sensing signal, in operation  1131 , the target object  1130  transmits to the smart key  1110  an authentication signal containing authentication information of the target object  1130 . 
     If the smart key  1110  receives the authentication signal, in operation  1113 , the smart key authenticates the target object  1130 . For example, it may be determined whether the user or owner of the smart key  1110  is the same as the user or owner of the target object  1130 . If the user or owner of the smart key  1110  is the same as the user or owner of the target object  1130 , a determination is made of whether a control function of the target object  1130  is used. When an authentication of the target object  1130  fails, the process may return to operation  1111 . When the authentication of the target object  1130  is successful, in operation  1115 , the smart key  1110  transmits a control signal about the target object  1130  to the target object  1130 . 
     In operation  1117 , the smart key  1110  sends at least one of the authentication signal or the authentication information to the external electronic device  1150 . The external electronic device  1150  authenticates the target object  1130  based on the authentication information or authentication information contained in the authentication signal. In operation  1151 , the external electronic device  1150  executes a target object control program. The target object control program may be a program that causes various functions contained in the target object  1130  to be performed according to the type of the target object  1130 . The external electronic device  1150  displays a control function list including various functions contained in the target object  1130  as items. The external electronic device  1150  outputs voice information corresponding to the control function list through a voice output unit. 
     In operation  1153 , the external electronic device  1150  receives a control input from the user. For example, the external electronic device  1150  selects a specific control function item contained in the control function list and receives the selected specific control function item from the user. In operation  1155 , the external electronic device  1150  sends corresponding information to the smart key  1110  in response to selection of the specific control function item. In this case, the smart key  1110  adds the corresponding information to the control signal and transmits the control signal to the target object  1130 . In operation  1157 , the external electronic device  1150  directly sends a control signal corresponding to the specific control function item to the target object  1130 . 
     As described above, a method is provided for controlling a target object of a binding device including transmitting a sensing signal for sensing the target object through a first antenna that transmits and receives a signal in a first frequency band, with the first antenna provided in a smart key related control circuit disposed inside a strap of the binding device, receiving an authentication signal including authentication information of the target object through the first antenna in response to the sensing signal, authenticating the target object based on the authentication information contained in the authentication signal, and transmitting a control signal for controlling the target object through the first antenna. 
     According to an embodiment, the transmitting of the control signal includes transmitting the control signal through a second antenna that transmits and receives a signal in a second frequency band different from the first frequency band of the first antenna. 
     According to an embodiment, the authenticating of the target object includes comparing the authentication information with at least one of authentication information of the target object stored in a memory of the binding device and authentication information of the target object collected from an external electronic device. 
     According to an embodiment, the method further includes transmitting authentication information of the target object to the external electronic device through a communication circuit provided in the control circuit for communication with an external electronic device. 
     According to an embodiment, the method further includes collecting biometric information of the user based on a live body sensor provided in the control circuit, authenticating the user using the biometric information, and transmitting at least one of the biometric information or authentication information of the user authenticated using the biometric information to an external electronic device through a communication circuit provided in the control circuit for communication with the external electronic device. 
     According to an embodiment, the method further includes receiving a feedback signal about the control signal, and transmitting the feedback signal to the external electronic device through a communication circuit provided in the control circuit for communication with the external electronic device. 
     According to an embodiment, the method further includes receiving a signal containing information about a specific control function from an external electronic device through a communication circuit for communication with the external electronic device, and generating a control signal based on the information about the specific control function contained in the signal and transmitting the control signal to the target object. 
     The term “module” used herein means a unit including, for example, one of hardware, software, or firmware or a combination of the two or more of them. The module may be interchangeably used, for example, with a unit, a logic, a logical block, a component, or a circuit. The module may be a minimum unit or a part of an integrally configured part. The module may be a minimum unit or a part which performs one or more functions. The module may be implemented mechanically or electromagnetically. For example, the module may include at least one of an application-specific integrated circuit (ASIC) chip, a field-programmable gate array, or a programmable-logic device, which has been known, will be developed in the future, or performs certain operations. 
     At least some of the devices (for example, modules or functions) or methods (for example, operations) may be implemented by an instruction stored in a computer-readable storage medium, for example, in the form of a program module. When the instruction is executed by the processor, the at least one processor may perform a function corresponding to the instruction. The computer-readable storage medium may be, for example, a memory. 
     The computer-readably storage medium may include a hard disk, a floppy disk, a magnetic medium (for example, a magnetic tape), an optical medium (for example, a compact disk read only memory (CD-ROM)), a digital versatile disk (DVD), a magneto optical medium (for example, a floptical disk), a hardware device (for example, a read only memory (ROM), a random access memory (RAM), or a flash memory). Further, the program instructions may include high-level language codes which may be executed by a computer using an interpreter as well as machine languages created using a compiler. The above-mentioned hardware device may be configured to be operated as one or more software module to perform operations of an embodiment of the present disclosure, and the converse is true. 
     The module or program module according to an embodiment of the present disclosure may include at least one of the above-mentioned elements, omit some of them, or further include other elements. The module, the program module, or the operations performed by other elements according to an embodiment of the present disclosure may be performed in a sequential, parallel, iterative, or heuristic method. Further, some operations may be executed in another sequence or may be omitted, or other operations may be added. Further, the embodiments disclosed in the specification are provided to describe the technical contents or for understanding of the technical contents, and the technical scope of the present disclosure is not limited thereto. Accordingly, the scope of the present disclosure should be construed to include all changes or an embodiment of the present disclosure based on the technical spirit of the present disclosure. 
     According to an embodiment of the present disclosure, the portability and in-use efficiency of a smart key can be enhanced by providing a binding device having a smart key therein. 
     Furthermore, according to an embodiment of the present disclosure, a user interface function of a smart key using an external electronic device can be implemented by providing a binding device including a communication circuit for communication with the external electronic device connected to the binding device. 
     While the present disclosure has been shown and described with reference to certain embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents.