KR102239312B1 - Wrist wearable type electronic apparatus - Google Patents

Abstract

A wrist-worn electronic device is provided. A wrist-worn electronic device according to an exemplary embodiment of the present invention includes: a main body on which at least one piece of information is displayed; A band part provided with at least one terminal for electrical connection with the main body, a flexible battery part built in, and detachably coupled to one side of the main body; And a fixing part that maintains or releases the fixing force of the main body and the band part according to the temperature generated by the flexible battery part, wherein the band part releases the fixing force of the fixing part when the flexible battery part heats up above a certain temperature. It is separated from the main body.

Description

Wrist wearable electronic device{WRIST WEARABLE TYPE ELECTRONIC APPARATUS}

The present invention relates to a wrist wearable electronic device.

In general, a smart phone terminal is an indispensable necessity for modern people as a multimedia integrated device, and unlike mobile phone terminals in the past, it aims to perform various functions such as Internet, application, TV, navigation, and SNS in addition to calling functions.

In order to implement various functions, the display of the smart phone terminal is enlarged, so that the size of the smart phone terminal is increased, making it inconvenient to carry when wearing simple clothes such as walking or exercising, and problems of theft and loss occur.

Furthermore, in the case of carrying a smartphone terminal in a bag, etc., there is an inconvenience of taking out and using the smartphone terminal to make an incoming or outgoing call or to use the message function, and the vibration or ringtone of the smartphone terminal carried in the bag is not heard. There is a problem in not receiving incoming calls and messages.

In order to solve this problem, a band-type portable terminal has been proposed.

An example of wearing a'band-type portable terminal' like clothes or jewelry has been suggested, and among them, smart devices in the form of wrist watches that are worn on the wrist or arm are being released. Smart devices in the form of wrist watches (aka'smart watches') are small in size and light, so you can always carry them on your wrist and check incoming calls and messages, thereby enhancing portability.

However, since the power supply for operating the device is limited only in the main body of the conventional smart watch, the use time is short, and there is a problem that it is very cumbersome to charge when all power is consumed during outdoor activities. .

KR 2014-0108509A

An object of the present invention is to provide a wrist-worn electronic device capable of extending a usage time by supplying power from the flexible battery unit to the main body by embedding a flexible battery unit in the band unit.

In addition, the present invention provides a wrist-worn electronic device capable of preventing a user from getting burned due to high temperature by allowing the band part to be easily separated from the main body when the flexible battery part built in the band part overheats above a certain temperature. There is a purpose.

In order to solve the above problems, the present invention provides a main body on which at least one information is displayed; A band part provided with at least one terminal for electrical connection with the main body, a flexible battery part built in, and detachably coupled to one side of the main body; And a fixing part that maintains or releases the fixing force of the main body and the band part according to the temperature generated by the flexible battery part, wherein the band part releases the fixing force of the fixing part when the flexible battery part heats up above a certain temperature. It provides a wrist wearable electronic device separated from the main body.

In addition, a coupling portion and a portion to be coupled corresponding to each other may be provided on one side of the body and the band portion, and the fixing portion may be provided as a protrusion and a groove portion corresponding to each other of the coupling portion and the coupled portion.

In addition, the to-be-engaged portion may be provided on one side of the band portion with the terminal, and at least a pair of protrusions may be provided on the to-be-engaged portion to protrude outward.

In addition, the protrusion may be provided to be movable inward of the to-be-engaged portion, and a stopper may be provided at a rear end of the protrusion to restrict the movement of the protrusion.

In addition, the stopper may be provided to have a predetermined length, and one end may be in contact with the protrusion and the other end may be in contact with the flexible battery.

Here, the stopper may be formed of a bimetal in which at least a part of the first member and the second member having different coefficients of thermal expansion are combined.

In this case, a portion of the first member and the second member having a relatively larger coefficient of thermal expansion may be disposed to contact the protrusion.

In addition, the to-be-engaged portion may be provided with a spring member for pressing the protrusion to the inside of the to-be-engaged portion.

In addition, at least one airtight member may be provided on the contact surface of the coupling portion and the portion to be coupled.

In addition, the flexible battery unit includes an exterior material, an electrode assembly, and an electrolyte, the exterior material and the electrode assembly are provided with a pattern for contraction and relaxation during bending, and the patterns of the exterior material and the electrode assembly may be provided to have a pattern that matches each other. I can.

In addition, the electrode assembly includes a positive electrode having a positive electrode active material layer disposed on one or both sides of a positive electrode current collector, a negative electrode and a separator having a negative electrode active material layer disposed on one or both surfaces of the negative electrode current collector, and the positive electrode, the negative electrode, and the separator The same pattern as that of the exterior material may be provided for shrinkage and relaxation during bending of silver.

In addition, the separation membrane is a non-woven fabric layer; And a nanofiber web layer containing polyacrylonitrile nanofibers laminated on one or both surfaces of the nonwoven fabric layer.

In addition, the pattern may be formed continuously or discontinuously, and the pattern may include at least one of a prism pattern, a semicircle pattern, a wave pattern, a polygonal pattern, an embossed pattern, and a mixed pattern thereof.

The wrist-worn electronic device according to an embodiment of the present invention has an advantage in that a flexible battery part is built in the band part and power is supplied from the flexible battery part to the main body, thereby extending the use time.

In addition, in the wrist-worn electronic device according to an embodiment of the present invention, when the flexible battery part is overheated, the band part is automatically separated from the main body, thereby preventing the risk that the user may be burned due to high temperature.

1 is a perspective view showing a wrist wearable electronic device according to an embodiment of the present invention.
2 is a view showing a state in which the main body and the band part are separated in FIG. 1.
FIG. 3 is an enlarged view of a main part showing a coupling portion and a portion to be coupled in FIG. 1.
4 is a perspective view showing a band part in a wrist wearable electronic device according to an embodiment of the present invention.
5 is a view showing the configuration of a protrusion and a stopper in a wrist wearable electronic device according to an embodiment of the present invention.
6 is a view showing an operating state of a stopper and a protrusion when a band part and a main body are combined in a wrist-worn electronic device according to an embodiment of the present invention.
7 is a view showing an operating state of a stopper and a protrusion when a band part and a main body are separated in a wrist-worn electronic device according to an embodiment of the present invention.
8 is an overall perspective view showing various patterns applied to an electrode assembly and an exterior material in a flexible battery unit used in a wrist-worn electronic device according to an embodiment of the present invention.
9 to 12 are schematic diagrams showing various forms of patterns in a flexible battery unit used in a wrist-worn electronic device according to an embodiment of the present invention.
13 is an enlarged cross-sectional view showing a detailed configuration of a flexible battery unit used in a wrist-worn electronic device according to an embodiment of the present invention.
14 is a state diagram of a wrist wearable electronic device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and the same reference numerals are added to the same or similar components throughout the specification.

The wrist-worn electronic device 100 according to an embodiment of the present invention includes a main body 110, a band part 120, and a fixing part 140 as shown in FIGS. 1 and 2.

The main body 110 is provided with a circuit board (not shown) therein, and various information transmitted from the circuit board is displayed on the display unit 112 provided on one surface, so that the user needs through the display unit 112 You can check the information.

Here, the main body 110 may be a smart watch, and may be a display on which an image is displayed, such as a small DMB or a PDP. It should be noted that the main body can be applied to any electric device capable of displaying various letters, numbers, and images on the display unit through an electrical signal. In addition, it should be noted that the main body may display the contents of the portable device and the electronic device through short-range communication with the portable device and the electronic device.

Such a body 110 is provided with a coupling portion 114 on at least one side to which the coupling portion 126 of the band portion 120 is fastened.

Here, the coupling part 114 may be provided in the form of a receiving groove having a certain area, and may be provided to have a width substantially equal to the width of the to-be-engaged part 126 of the band part 120.

At this time, at least one first terminal 115 electrically connected to the circuit board is provided inside the coupling part 114 to provide a second The terminals 124 are electrically connected to each other.

Here, the second terminal 124 is provided to correspond to the first terminal 115.

The band part 120 is electrically connected to the body 110 through the connection of the first terminal 115 and the second terminal 124 when it is coupled to the body 110 to supply power to the body 110 It is to do.

As shown in FIG. 4, the band part 120 is provided to have a predetermined length, and the flexible battery part 130 is embedded in the housing 122.

In addition, a portion to be coupled 126 corresponding to the coupling portion 114 is provided at one end side of the band portion 120.

The to-be-engaged portion 126 may be provided in a protruding shape so as to be inserted into the coupling portion 114 provided in the form of a receiving groove.

At this time, a second terminal 124 for electrical connection with the first terminal 115 is provided at one end side of the coupled portion 126. For example, the second terminal 124 may be provided on the front end side of the to-be-coupled portion 126. However, it should be noted that the position of the second terminal 124 is not limited to the front end of the portion to be coupled 126, and may be formed on the side of the portion to be coupled 126.

Accordingly, the flexible battery unit 130 built in the band unit 120 is electrically connected to the first terminal 115 and the second terminal 124 when the coupling portion 114 and the coupled portion 126 are coupled. The main body 110 is electrically connected to each other through a natural connection.

Here, the second terminal 124 may be connected to the positive terminal 138 and the negative terminal 137 provided in the flexible battery unit 130 through separate connection lines (not shown), or the positive terminal ( 138) and the cathode terminal 137 may be directly exposed to form the second terminal 124.

On the other hand, at least one airtight member 129 is disposed on the contact surface of the coupling portion 114 and the portion to be coupled 126 that are mutually coupled when the main body 110 and the band portion 120 are coupled to each other, and the coupling portion ( 114) and the intrusion of a fluid into the inside of the portion to be coupled 126 may be blocked.

In addition, the band part 120 may be provided as a single cylindrical body in which the flexible battery part 130 is embedded, one end is coupled to the coupling part 114 and the other end is coupled to one side of the main body, but the flexible battery part ( 130) is composed of two members, each of which is embedded, and the coupled portions 126 are respectively connected to the coupling portions 114 of the main body, and the other end may be connected to each other through separate fastening means.

The flexible battery unit 130 serves to supply power to the main body 110 and serves as an auxiliary battery that assists the main battery provided in the main body 110.

Here, it should be noted that the flexible battery unit 130 may be used as a main battery of the main body 110.

Such a flexible battery unit 130 includes an electrode assembly 133 and an exterior material 131 as shown in FIG. 13.

The electrode assembly 133 is encapsulated with an electrolyte in the exterior material 131, and may have a form in which a separator 135 is formed between the anode 134 and the cathode 136 as shown in FIG. 13. .

The positive electrode 134 includes a positive electrode current collector 134a and a positive electrode active material 134b, the negative electrode 136 includes a negative electrode current collector 135a and a negative electrode active material 136b, and the positive or negative electrode is the It may be sealed with the separation membrane 135 and integrated with the separation membrane 135.

Here, the negative electrode current collector 135a and the positive electrode current collector 134a may have a negative terminal 137 and a positive terminal 138 respectively extending from the body.

Here, the negative terminal 137 and the positive terminal 138 are electrically connected to the second terminal 124 provided in the coupled portion 126.

In this case, the separator 135 may include a nonwoven fabric layer 135a and a nanofiber web layer 135b laminated on one or both surfaces of the nonwoven fabric layer 135a.

Here, the nanofiber web layer 135b may be a nanofiber containing at least one selected from polyacrylonitrile nanofibers and polyvinylidene fluoride nanofibers.

Preferably, when the nanofiber web layer 135b is formed, it may be composed of only polyacrylonitrile nanofibers to ensure spinnability and uniform pore formation. In addition, the polyacrylonitrile nanofibers of the nanofiber web layer 135b may have an average diameter of 0.1 to 2 μm, preferably 0.1 to 1.0 μm.

This is because if the average diameter of the nanofibers is less than 0.1 μm, there may be a problem in that the separator does not secure sufficient heat resistance, and if it exceeds 2 μm, the mechanical strength of the separator is excellent, but the elastic force of the separator may decrease. .

In addition, the nonwoven fabric constituting the nonwoven fabric layer 135a is cellulose, cellulose acetate, polyvinyl alcohol (PVA), polysulfone, polyimide, polyetherimide, polyamide ( polyamide), polyethylene oxide (PEO, polyethylene oxide), polyethylene (PE, polyethylene), polypropylene (PP, polypropylene), polyethylene terephthalate (PET, polyethylene terephthalate), polyurethane (PU, polyurethane), polymethyl methacrylate One or more selected from (PMMA, poly methylmethacrylate) and polyacrylonitrile may be used.

Here, the nonwoven layer may further include an inorganic additive, and the inorganic additives are SiO, SnO, SnO ₂ , PbO ₂ , ZnO, P ₂ O ₅ , CuO, MoO, V ₂ O ₅ , B ₂ O ₃ , Si ₃ N ₄ , CeO ₂ , Mn ₃ O ₄ , Sn ₂ P ₂ O ₇ , Sn ₂ B ₂ O ₅ , Sn ₂ BPO ₆ , TiO ₂ , BaTiO ₃ , Li ₂ O, LiF, LiOH, Li ₃ N, BaO, Na ₂ O, Li ₂ CO ₃ , CaCO ₃ , LiAlO ₂ , SiO ₂ , Al ₂ O ₃ It may include at least one selected from PTFE.

In addition, the inorganic particles as the inorganic additive may have an average particle diameter of 10 to 50 nm, preferably 10 to 30 nm, and more preferably 10 to 20 nm.

In addition, the average thickness of the separator may be 10 to 100 μm, preferably 10 to 50 μm.

This means that if the average thickness of the separator is less than 10 μm, the separator is too thin to ensure long-term durability of the separator due to repeated bending and/or spreading of the battery, and if it exceeds 100 μm, it is disadvantageous to thinning the flexible battery unit. It is preferable to have an average thickness within the above range.

In addition, the non-woven layer is formed to have an average thickness of 10 ~ 30㎛, preferably 15 ~ 30㎛, the nanofiber web layer preferably has an average thickness of 1 ~ 5㎛.

The positive electrode current collector and/or the negative electrode current collector may be made of a thin metal foil, formed in a strip shape having a predetermined length, and formed of copper, aluminum, stainless steel, nickel, titanium, chromium, manganese, iron, cobalt, zinc, It may be made of a metal foil manufactured by molybdenum, tungsten, silver, gold, and combinations thereof.

The positive electrode active material includes a positive electrode active material capable of reversibly intercalating and deintercalating lithium ions, and representative examples of such positive electrode active materials include LiCoO ₂ , LiNiO ₂ , LiMnO ₂ , LiMn ₂ O ₄ , or LiNi _{1 -xy} Co _x M _y O ₂ (0 ≤ x ≤1, 0 ≤ y ≤ 1, 0 ≤ x+y ≤ 1, M is a metal such as Al, Sr, Mg, La, etc.) Can be used. However, in the present invention, it is of course possible to use other types of positive electrode active materials in addition to the positive electrode active material.

In addition, the negative active material 136b includes a negative active material capable of intercalating and deintercalating lithium ions, and the negative active material 126b includes crystalline or amorphous carbon, carbon fiber, or carbon of a carbon composite. It may be selected from the group consisting of a negative electrode active material, a tin oxide, a lithium-formed one, lithium, a lithium alloy, and a mixture thereof. However, the present invention is not limited to the type of the negative active material.

Meanwhile, the positive electrode active material 134b and the negative electrode active material 136b are made of PTFE (Polytetrafluoroethylene) to prevent separation from the positive electrode current collector 134a or the negative electrode current collector 135a, and to prevent cracking of the positive electrode active material layer and the negative electrode active material insect. Ingredients may be contained.

The exterior material 131 is made of a plate-shaped member having a certain area, and is to protect the electrode assembly 133 from external force by accommodating the electrode assembly 133 and an electrolyte therein.

To this end, the exterior material 131 is provided with a pair of the first exterior material 131a and the second exterior material 131b, and is sealed with an adhesive along the rim so that the electrolyte and electrode assembly 133 accommodated therein are externally It prevents exposure and prevents leakage to the outside.

Such an exterior material 131 may be formed of two members, and then the edges of the first exterior material 131a and the second exterior material 131b may be sealed with an adhesive, or consist of one member in the width direction or It should be noted that after being folded in half along the length, the rest of the mating part may be sealed with an adhesive.

In this case, the exterior material 131 may be provided in a flexible flat plate shape, but as shown in FIGS. 4 and 8, a pattern 139a for contraction and relaxation during bending may be provided on at least one surface as shown in FIGS. 4 and 8.

That is, the pattern 139a is for contraction and relaxation in the longitudinal direction of the exterior material 131 during bending. In the pattern 139a, the peaks and valleys may be repeatedly arranged along the length direction of the exterior material 131.

Specifically, the peaks and valleys of the pattern 139a are formed parallel to a straight line parallel to the width direction of the exterior material 131.

In this case, as shown in FIG. 8, the pattern 139a may be formed in parallel with neighboring peaks and valleys at the same interval, and the intervals of neighboring peaks or valleys may be formed in parallel at different intervals. It may be provided in the form of a combination of the same interval and different intervals.

Accordingly, in the flexible battery unit 130 according to an embodiment of the present invention, contraction and relaxation in the longitudinal direction during bending are easily achieved through the pattern 139a.

For this reason, even if a repetitive load is applied during the repetitive bending of the exterior material 131, the fatigue applied to the exterior material 131 itself can be reduced, as well as the electrode assembly 133 disposed inside the exterior material 131 Also, it can be protected from the load generated during the banding operation.

In addition, the pattern 139a formed on the exterior material 131 may be formed on the entire surface of the exterior material 131 or may be partially formed.

On the other hand, the electrode assembly 133 may be provided in the form of a flexible plate, but the same pattern as the pattern 139a formed on the exterior material 131 for contraction and relaxation during bending, like the exterior material 131 (139b) may be provided.

That is, the positive electrode 134, the negative electrode 136, and the separator 135 constituting the electrode assembly 133 are the same pattern 139b as the pattern 139a formed on the exterior material 131 for contraction and relaxation during bending. ) May be provided.

Here, the pattern 139b formed on the electrode assembly 133 is formed parallel to a straight line parallel to the width direction as shown in FIG. 8. At this time, it is revealed that it is okay if the pattern 139a formed on the exterior material 131 and the pattern 139b formed on the electrode assembly 133 coincide with each other.

In addition, the patterns (139a, 139b) may be formed continuously or discontinuously, as shown in Figs. 9 to 12, the cross-sectional shape of the ridge and valley is a straight pattern, a prism pattern, a semicircle pattern, a wave It may be formed in one or more patterns selected from patterned patterns, polygonal patterns, and mixed patterns thereof.

The fixing part 140 is for preventing the band part 120 from being separated from the main body 110 by providing a fixing force when the band part 120 and the main body 110 are coupled. These fixing parts 140 are provided in a form corresponding to each other in the coupling part 114 and the to-be-engaged part 126.

As an example, the fixing portion 140 may be provided with at least one protrusion (spring member 144) and a groove portion 116 corresponding to each other to the coupling portion 114 and the portion to be coupled 126, the The groove 116 may be recessed in the inner side of the coupling part 114 provided on one side of the main body 110, and the protrusion 141 may be provided to protrude outward on one side of the coupling part 126. .

Through this, when the band part 120 and the main body 110 are coupled, the protrusion 141 is inserted into the groove part 116 to provide a fixing force, thereby preventing the band part 120 from being separated from the main body 110.

At this time, the fixing part 140 is released when the flexible battery part 130 heats up to a certain temperature or higher, for example, 40°C or higher when the main body 110 is charged through the flexible battery part 130. The band part 120 can be easily separated from the main body 110.

To this end, a protrusion 141 provided to protrude outward on one side of the coupled portion 126 is provided to be movable inward of the coupled portion 126, and the protrusion ( A stopper 142 for restricting movement of the 141 to the inside of the coupled portion 126 may be provided.

Accordingly, in a typical case in which the flexible battery unit 130 generates heat at a temperature less than a set value in the process of supplying power to the main body 110, the protrusion 141 is formed by the stopper 142. ) Is prevented from moving to the inside of the protrusion 141, thereby preventing the protrusion 141 from being separated from the coupling portion 114 by maintaining the inserted state in the groove 116.

In addition, when the flexible battery unit 130 generates heat at a temperature equal to or higher than a set value in the process of supplying power to the main body 110, the holding force by the stopper 142 is released, so that the protrusion 141 becomes a part to be coupled ( By allowing the movement to the inside of the 126, the fixing force is released so that the coupled portion 126 can be separated from the coupling portion 114.

To this end, the stopper 142 is provided in the shape of a bar having a predetermined length, one end is in contact with the protrusion 141 and the other end is disposed to contact the flexible battery unit 130, the stopper 142 is At least a portion of the first member 142a and the second member 142b having different coefficients of thermal expansion are formed of a combined bimetal.

At this time, a member having a relatively larger coefficient of thermal expansion among the first member 142a and the second member 142b is disposed to contact the protrusion 141 so that the flexible battery unit 130 rises to a temperature higher than a set value. In this case, the stopper 142 may be bent in the inner direction of the part to be coupled 126.

In addition, the end side of the stopper 142 in contact with the flexible battery unit 130 increases an area in contact with the outer surface of the flexible battery unit 130 to effectively reduce heat generated from the flexible battery unit 130 toward the stopper 142. A contact plate 143 having a certain area may be provided so as to be transmitted. Here, the contact plate 143 may be provided to partially cover one surface of the flexible battery unit 130 or may be provided entirely. In addition, when a pattern for contraction and relaxation is formed on the flexible battery unit 130, the contact plate 143 may also have the same pattern as the pattern 139b of the flexible battery unit 130.

In addition, when high-temperature heat is generated in the flexible battery unit 130 and the stopper 142 is bent inside the portion to be coupled 126, the protrusion 141 is linked to the deformation of the stopper 142 and the protrusion 141 is A spring member 144 may be provided to press the protrusion 141 to the inside of the portion to be coupled 126 so that the protrusion 141 can be automatically entered into the inner side of the 126.

To this end, a seating groove 127 in which the protrusion 141, the stopper 142 and the spring member 144 are disposed is provided in the portion to be coupled 126, and through which the seating groove 127 is communicated. A hole 128 is formed so that the protrusion 141 is inserted into the through hole 128.

At this time, the protrusion 141 is provided with an extension part 141a extending along an edge at an end side disposed inside the part to be engaged 126 so that the protrusion 141 is externally formed through the through hole 128. It is prevented from leaving. In addition, the spring member 144 is disposed between the extension portion 141a and the inner surface of the coupled portion 126.

Through this, the protrusion 141 is always kept pressed into the seating groove 127 by the elastic force provided through the spring member 144. Accordingly, when high-temperature heat is generated in the flexible battery unit 130 and the stopper 142 is bent toward the inside of the portion to be coupled 126, the stopper 142 is bent toward the inside of the seating groove 127 and protrudes. The protrusion 141 automatically enters the inside of the part to be coupled 126 by the elastic force as the restraining force supporting the end portion of the 141 disappears.

As a result, the coupling portion 126 is released from the coupling portion 114 by releasing the fixing force, so that the wrist-worn electronic device 100 can be separated from the user's wrist by its own weight or can be easily separated by the user. There will be.

As described above, in the wrist-worn electronic device 100 according to an embodiment of the present invention, the stopper 142 and the protrusion 141 serve as a switch for providing or releasing a fixing force according to heat generated from the flexible battery unit 130. Will be performed.

Accordingly, in an emergency situation in which high-temperature heat is generated in the flexible battery unit 130, it is released by the fixing force so that the wrist-worn electronic device 100 can be easily separated from the wearer's wrist, thereby avoiding the risk of burns. do.

Here, although the set point temperature generated in the flexible battery unit 130 is illustrated as 40° C., it is not limited thereto, and it should be noted that the set point temperature may be between 20 and 100° C. In addition, the stopper 142 at least partially made of bimetal may be made of a metal material capable of securing an appropriate amount of deformation at the set temperature.

Although an embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiment presented in the present specification, and those skilled in the art who understand the spirit of the present invention can add components within the scope of the same idea. It will be possible to easily propose other embodiments by changing, deleting, adding, etc., but it will be said that this is also within the scope of the present invention.

100: wrist wearable electronic device 110: main body
112: display unit 114: coupling unit
115: first terminal 116: groove
120: band part 122: housing
124: second terminal 126: part to be coupled
127: mounting groove 128: through hole
129: airtight member 130: flexible battery part
131: exterior material 131a: first exterior material
131b: second exterior material 133: electrode assembly
134: positive electrode 134a: positive electrode current collector
134b: positive electrode active material 135: separator
135a: nonwoven fabric layer 135b: nanofiber web layer
136: negative electrode 136a: negative electrode current collector
136b: negative active material 137: negative terminal
138: positive terminal 139a, 139b: pattern
140: fixing part 141: protrusion
141a: extension part 142: stopper
142a: first member 142b: second member
143: contact plate 144: spring member

Claims (13)

A main body on which at least one piece of information is displayed;
A band part provided with at least one terminal for electrical connection with the main body, a flexible battery part built in, and detachably coupled to one side of the main body; And
Including; a fixing part for maintaining or releasing the fixing force of the main body and the band part according to the temperature generated in the flexible battery part,
The band unit is a wrist worn electronic device, characterized in that when the flexible battery unit heats up above a certain temperature, the fixing force of the fixing unit is released and separated from the body. The method of claim 1,
One side of the main body is provided with a coupling portion for coupling with the band portion, and one side of the band portion is provided with a coupled portion corresponding to the coupling portion,
The fixing part includes a groove formed inwardly of the coupling part, a protrusion movably provided in a part to be engaged, a stopper for restraining movement of the protrusion at a rear end of the protrusion, and the protrusion toward the inside of the to-be-engaged part. Wrist wearable electronic device comprising a spring member to pressurize. The method of claim 2,
The stopper is provided to have a certain length, one end is in contact with the protrusion and the other end is in contact with the flexible battery, and at least a part is worn on a wrist made of bimetal in which a first member and a second member having different coefficients of thermal expansion are combined Type electronics. The method of claim 2,
A wrist wearable electronic device having a contact plate having a predetermined area at an end side of the stopper in contact with the flexible battery unit to increase the contact area with the flexible battery unit to transfer heat generated from the flexible battery unit to the stopper. The method of claim 1,
The flexible battery unit includes an exterior material, an electrode assembly, and an electrolyte,
The exterior material and the electrode assembly are each provided with a pattern formed so that the peaks and valleys are repeatedly arranged along the length direction for contraction and relaxation during bending,
A wrist wearable electronic device formed to match the pattern formed on the exterior material and the pattern formed on the electrode assembly. delete delete delete delete delete delete delete delete

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