KR20100070241A - Hinge assemblies for folder-type portable communications devices - Google Patents

Abstract

PURPOSE: A hinge assembly of a folder-type portable communication device is provided to offer power capable of being supported in a closed position by biasing a frame assembly with a spring shaft. CONSTITUTION: Each link includes the first and second arm with a camprofile. The first and second slide cams(160,162) include a camprofile touching to the camprofile of the second arm of the first and second links. The first and second slide cams are touched with the first arm of the first and second links. The first and second spring shafts(137,146) are combined in the first and second slide cams and the first and second frame assemblies. The first and second spring shafts offer biasing force heading to the second arm of the first and second links of the first and second slide cams.

Description

Hinge assembly for folder type mobile communication device {HINGE ASSEMBLIES FOR FOLDER-TYPE PORTABLE COMMUNICATIONS DEVICES}

The present invention relates to a hinge assembly for use in portable or mobile communication terminals and devices such as flip type or folder type mobile phones.

Mobile or portable wireless communication devices and terminals (eg, mobile phones, personal digital assistants (PDAs); Global Positioning Systems (GPS); media devices, etc.) are becoming increasingly popular. With the increase in popularity, the number of users has increased, and the individual preferences and tastes of the users related to the function and operation of the device are also affected, such as various user preferences regarding the usage, maintenance, location, opening and closing method during operation of the device. Growing.

In this regard, some users may prefer a mobile communication device that is open by flipping or rotating with a finger, since this type of mobile communication device may be smaller and smaller than other mobile communication devices. Generally, a flip type portable communication device may have two body parts that rotate relative to each other from a closed position to an open position. As an example, one of the body parts may have a display screen, and the other of the body parts may have an alphanumeric keypad that can be exposed and accessed by rotating the body parts relative to each other to open the device. Can be.

Exemplary embodiments of a hinge assembly for use in portable or mobile communication terminals and devices, such as flip-type or folder-type cell phones, are disclosed. For example, one embodiment provides a hinge assembly having first and second frame assemblies. The first and second links are coupled so as to be rotatable with each other by a central shaft. Each link has a first arm and a second arm with a camp profile. The first and second slide cams contact first arms of each of the first and second links. Each slide cam has a camp profile in contact with the camp profile provided in the second arms of the corresponding first and second links. First and second spring shafts are coupled to corresponding first and second slide cams and corresponding first and second frame assemblies. The spring shaft provides a biasing force of the slide cam towards the second arm of the links. When the hinge assembly is in the closed position, the spring shaft provides a biasing force such that the frame assembly is held in the closed position. When the hinge assembly is at the opening angle, a frictional force is generated that substantially eliminates or offsets the biasing force of the spring shaft such that the hinge assembly is maintained at the opening angle.

Another exemplary embodiment of the hinge assembly includes first and second frame assemblies and first and second links. The center shaft couples the links so that they can rotate relative to each other. Each link has a second arm having a first arm and a camp profile. First and second slide cams contact the first arm of each of the first and second links. Each slide cam is in contact with the camp profile of the second arm of the corresponding first and second links. First and second spring shafts are coupled to the corresponding slide cam and the corresponding frame assembly. The spring shaft provides a biasing force of the slide cam towards the second arm of the link. When the hinge assembly is in the closed position, the spring shaft provides a biasing force that keeps the frame assembly in the closed position. When the hinge assembly is at the opening angle, a frictional force is generated that substantially eliminates or offsets the biasing force of the spring shaft to maintain the hinge assembly at the opening angle.

Other areas of application will be apparent from the description provided herein. The description and specific examples are for illustrative purposes only and are not intended to limit the scope of the invention.

Hereinafter, exemplary embodiments will be described in more detail with reference to the accompanying drawings.

Various exemplary embodiments of a hinge assembly or hinge module for use in connection with a mobile or portable communication terminal or device are disclosed. In an exemplary embodiment, the hinge assembly or hinge module rotatably couples the first and second bodies of a folder type or flip type mobile communication terminal. The hinge assembly has two frame assemblies and two links facing each other. Each link includes a first and a second arm, a slide cam in contact with the first arm, and a spring shaft (eg, wire spring, etc.) coupled to the slide cam and for coupling the slide cam to the corresponding frame assembly. It is provided. The center shaft rotatably couples the first and second links such that the first and second links are rotatable relative to each other. Spring shaft plates for supporting one end of the corresponding spring shaft are mounted (eg, riveted, welded, glued, etc.) to each frame assembly. Each frame assembly has first and second frames or members that are assembled together to form a frame assembly.

One of the frame assemblies has a slot and a through hole at one end, and the other frame assembly has a slot and a through hole at the other end. A slide shaft is inserted into the slot and the first arm of the link. A fixed shaft is inserted in the through hole and the second arm of the link. A fixed shaft guide is mounted to the frame assembly (eg, riveted, welded, glued, etc.) to guide the fixed shaft of the second arm and support the other end of the spring shaft. Thus, the ends of the spring shaft are supported by the fixed shaft guide and the spring shaft plate, respectively.

In use, one of the frame assemblies is coupled (eg, mechanically fastened, riveted, welded, glued) to the main body or first body of the mobile communication terminal. The other of the frame assemblies is coupled (eg, mechanically fastened, riveted, glued, etc.) to a folder or second body of the terminal.

The first and second links are coupled to each other by the central shaft to form a linkage assembly. Each of the first and second spring shafts is coupled to the slide cam to form a slide cam assembly. The slide cam has fixed slots at both ends thereof, and each frame assembly includes a guide corresponding to the fixed slot of the slide cam. Thus, each slide cam assembly is coupled to the corresponding first or second frame assembly by engagement of a guide and a fixed slot.

A fixed shaft guide is coupled to the linkage assembly at the second arms of the first and second links. The fixed shaft is inserted into the second arms of the first and second links.

The frame assembly is coupled to the fixed shaft guide. A slide shaft is inserted into the slot of the frame assembly and the first arms of the first and second links. Each spring shaft plate is coupled to the frame assembly to support or fix one end of the corresponding spring shaft to the corresponding frame assembly.

Each of the second arms of the first and second links has a camp profile having concave and convex points. Each slide cam assembly has a camp profile with an inflection point. When the hinge assembly is closed (at 0 degrees), the inflection point contacts a concave point of the camp profile of the second arm of the first and second links. The spring shaft of the slide cam assembly provides a biasing force of the slide cam towards the second arm. The camp profile pushes the corresponding slide cam to slide and the spring shaft is deformed to generate a biasing force. Thus, if the inflection point of the slide cam moves to the concave point of the camp profile of the second arm, the terminal remains in the closed position.

In each slide cam assembly, the convex point of the camp profile is inclined about 20 degrees with respect to the horizontal plane. When the terminal is opened about 40 degrees or more (e.g., rotates the folder or the second body to be about 40 degrees or more with respect to the main body or the first body), the two slides are caused by a biasing force applied to the spring shaft. Friction forces may occur between the shaft and the slot of the corresponding frame assembly. The friction force cancels the biasing force of the spring shaft so that the folder is not biased to the open or closed position with respect to the main body of the terminal. Thus, when the rotation angle between the folder and the main body is in the range of about 40 degrees to about 180 degrees, the rotation of the folder relative to the main body is not biased in the open or closed state.

One or both of the second arms of the link may have a hook, and one or both of the fixed shaft guides may have a corresponding hook. In the 180-degree rotation state, the hooks may be fastened to each other to keep the terminal open. Therefore, embodiments disclosed herein have a hinge assembly that allows the opening angle (angle of rotation of the terminal bodies relative to each other) to be selected and set relatively freely by the user within the range of about 40 degrees to about 180 degrees.

Referring to the drawings, FIGS. 1-15 illustrate exemplary embodiments of a hinge assembly or hinge module 100 implementing one or more aspects of the present invention. As shown in FIG. 1, the hinge assembly 100 may be used in a folder type or flip type cell phone 104. Generally, cell phone 104 has a first body 108 (also referred to as a main body or a lower body) and a second body 112 (also referred to as a folder or an upper body). The first body 108 and the second body 112 may be electrically connected for operation, for example, via a flexible printed circuit board (flexible PCB). The second body 112 is moved relative to the first body 108 (eg, hinged movement, pivot, rotation, flip-up) for the second body 112 to open and close the mobile phone 104. Etc.) may be hinged to the first body 108 by the hinge assembly 100. As disclosed herein, in the illustrated embodiment, the hinge assembly 100 may advantageously allow the opening angle to be selected and set relatively freely by the user within the range of about 40 degrees to about 180 degrees. Other embodiments of the hinge assembly may be configured to allow other ranges for the opening angle, such as ranges from angles greater than or equal to 40 degrees to angles greater than or equal to 180 degrees.

The user may move the first and second bodies 108, 112 relative to each other such that the "open angle" defined between the first and second bodies 108, 112 is in the range of 40 degrees to about 180 degrees. have. At any point, the hinge assembly 100 operates to hold the mobile phone 104 in such an open position while the first and second bodies 108, 112 are maintained at their open angles.

In particular, in the example shown in FIG. 1, the second body 112 of the exemplary mobile phone 104 is provided with an external screen 115 for displaying various operations of the mobile phone 104. The first body 108 of the mobile phone 104 may be provided with a keypad (not shown) for performing various functions related to the mobile phone 104. When the cell phone 104 is in the closed position (see FIG. 1), the keypad is disposed below and hidden by the second body 112, thus avoiding inadvertent contact or manipulation, for example. In order to expose the keypad for use, the mobile phone 104 may be gripped by the first body 108, for example by rotating the second body 112 about the hinge assembly 100 with respect to the first body 108. Can be opened by flipping. Alternatively, for example, the user can open the mobile phone 104 by moving the first body 108 about the hinge assembly 100 relative to the second body 112 while holding the second body 112 stationary. have. As another example, the user may move the first and second bodies 108, 112 relative to each other about the hinge assembly 100 to open the mobile phone 104. Thus, the particular manners and examples in which the user selects to open and close the cell phone 104 should not be considered as limiting the scope of the invention.

The arrow in FIG. 1 shows that the hinge assembly 100 is located on the long side of the mobile phone 104, and other orientations and positions of the hinge assembly are also within the scope of the present invention. For example, another embodiment may include a hinge assembly located along the short upper or lower side of the mobile phone.

For the purpose of bias and clarity of explanation, the hinge assembly 100 is described with reference to the portable communication terminal 104 shown in FIG. The hinge assembly 100 disclosed herein may be used in combination without limitation to other mobile or portable communication terminals and devices (eg, other mobile phones, PDAs, other electronic devices, etc.), and “mobile phone 104 May be replaced with, for example, a "mobile terminal".

As shown in FIG. 2, the hinge assembly 100 includes first and second frame assemblies 118 and 120. One of the frame assemblies 118 and 120 may be coupled (eg, mechanically fastened, riveted, etc.) to the first body 108 of the mobile phone 104 through the through hole 121. The other may be coupled to the second body 112 of the mobile phone 104 through the through hole 121 (eg, mechanical fastening, riveting, etc.).

Each frame assembly 118, 120 may include first and second frame pieces or frame members 122, 124, 126, and 128. The frame members 122 and 124 may be assembled with each other to form the first frame assembly 118. Similarly, the frame members 126 and 128 may be assembled with each other to form the second frame assembly 120. Assembled frame assemblies 118 and 120 are shown in FIGS. 1, 9, 11 and 13. Also shown in FIG. 5 is an assembled frame assembly 118.

5, the first frame member 122 of the first frame assembly 118 has a slot or elongated opening 140 and a through hole 132 at one end thereof, and the other frame member 124. Has a slot or elongated opening 134 and a through hole 136 at the other end. Slots 130 and 134 may be aligned to receive the first slide shaft 137 (see FIG. 2), and through holes 132 and 136 are aligned to receive the first fixed shaft 139. Can be.

The frame members 126 and 128 of the second frame assembly 120 are similarly constructed so that the frame member 126 has a slot or elongated opening 138 and a through hole 140 at one end (FIG. 13). The other frame member 128 has a slot or an elongated opening and a through hole at the other end. Slots of the second frame assembly 120 may be aligned to receive the second slide shaft 146 (see FIG. 2), and through holes may be aligned to receive the second fixed shaft 147.

In addition, as shown in FIG. 2, the hinge assembly 100 has first and second links 148 and 150 that generally oppose each other. The first link 148 has first and second arms 152, 154. The first arm 152 slides a portion of the first slide shaft 137 between the ends of the first slide shaft 137 received in the slots 130, 134 of the first frame assembly 118. It is formed to receive. The second arm 154 is slidable between the ends of the first fixed shaft 139 to accommodate a portion of the first fixed shaft 139 in the through holes 132 and 136 of the first frame assembly 118. It is formed so as to accommodate.

The second link 150 also includes first and second arms 156, 158. The first arm 156 is configured to slidably receive a portion of the second slide shaft 146 between the ends of the second slide shaft 146 received in the slot 138 of the second frame assembly 120. do. The second arm 158 slidably receives a portion of the second fixed shaft 147 between the ends of the second fixed shaft 147 received in the through hole 140 of the second frame assembly 120. Is formed.

The slide cams 160 and 162 are formed to contact the first arms 152 and 156 of the links 148 and 150, respectively. Spring shafts 164 and 168 (eg, wire springs, etc.) are coupled to each slide cam 160 and 162 to couple the slide cams 160 and 162 to the corresponding frame assemblies 118 and 120.

As shown in FIG. 4, the central shaft 168 rotatably couples the first and second links such that the first and second links 148, 150 are rotatable relative to one another. The first and second links 148 and 150 combine with each other to form a link assembly 170.

As shown in FIG. 8, spring shaft plates 172, 174 are mounted (eg, riveted, welded, glued, etc.) to corresponding frame assemblies 118, 120. In FIG. 9, each spring shaft plate 172, 174 is riveted to a corresponding frame assembly 118, 120 to support the ends of the corresponding spring shafts 164, 168.

The fixed shaft guide 176 is mounted (eg, riveted, welded, bonded, etc.) to the first frame assembly 118 so that the fixed shaft 139 (see FIG. 2) is attached to the second arm of the first link 148. Guide 154, and supports the other end of the spring shaft (164). Thus, an end of each spring shaft 164 is supported by the fixed shaft guide 176 and the spring shaft plate 172.

The fixed shaft guide 178 is also mounted on the second frame assembly 120 (eg, riveted, welded, bonded, etc.) to guide the fixed shaft 147 to the second arm 158 of the second link 150. The other end of the spring shaft 168 is supported. Accordingly, the end of the spring shaft 168 is supported by the fixed shaft guide 178 and the spring shaft plate 174.

The first and second spring shafts 164 and 168 are coupled to the corresponding slide cams 160 and 162, and the slide cam assembly 179 consisting of the spring shaft 164 and the slide cam 160 shown in FIG. To form a slide cam assembly. In this embodiment, the slide cam 160 has fixed slots 180 at both ends of the slide cam 160. The frame assembly 118 includes a guide 182 corresponding to the fixed slot 180 of the slide cam 160. Accordingly, the slide cam assembly 179 formed of the spring shaft 164 and the slide cam 160 may be coupled to the first frame assembly 118 by engaging the guide 182 and the fixing slot 180. The second spring shaft 168 and the slide cam 162 may be coupled to the second frame assembly 120 in a similar manner.

The fixed shaft guides 176 and 178 are coupled to the link assembly 170 at the second arms 154 and 158 of each of the first and second links 148 and 150. The fixed shafts 139 and 147 are inserted into the second arms 154 and 158 of the first and second links 148 and 150.

As shown in FIG. 7, the frame assemblies 118 and 120 are coupled to the fixed shaft guides 176 and 178. The slide shafts 137 and 146 are inserted into the slots of the frame assembly 118 and 120 and the first arms 152 and 156 of the first and second links 148 and 150. Each spring shaft plate 172, 174 coupled to the frame assembly 118, 120 supports and secures the ends of the corresponding spring shafts 164, 168 to the corresponding frame assembly 118, 120.

As shown in FIG. 10, the second arms 154, 158 of the first and second links 148, 150 have a camp profile 184. Each camp profile 184 has a recess 186 and a protrusion 188. The slide cams 160 and 162 have camp profiles 190. Each camp profile 190 includes an inflection portion 192. When the hinge assembly 100 is closed (at an open angle of 0 degrees as shown in FIG. 10), the inflection portion 192 of the camp profile 190 of the slide cams 160, 162 is the second arm ( It contacts the recess 186 of the camp profile 184 of 154,158. The spring shafts 164, 168 of the slide cam assembly provide the biasing force towards the second arms 154, 158 to the slide cams 160, 162. When the camp profile 184 of the second arm 154, 158 slides to slide the corresponding slide cams 160, 162, the spring shafts 164, 168 may be deformed to generate a biasing force. Therefore, when the inflection portion 192 of the camp profile 190 of the slide cams 160 and 162 contacts the recess 186 of the camp profile 184 of the second arms 154 and 158, the mobile phone or The mobile communication terminal is intended to remain in or remain in the closed position.

Referring to FIG. 12, in the illustrated embodiment, the convex portion 188 of the camp profile 184 of the second arms 154 and 158 is inclined at about 20 degrees with respect to the horizontal plane. When the terminal is opened at about 40 degrees (shown in FIGS. 11 and 12) or open beyond such an angle (eg, by rotating a folder or second body about 40 degrees or more relative to the main or first body) ), The biasing force applied to the spring shafts 164, 168 generates friction between the slide shafts 137, 146 and the corresponding slots 130, 134, 138 of the frame assembly 118, 120 (FIG. 12). Reference). The friction force then cancels the biasing forces of the spring shafts 164 and 168 so that the folder or the second body is not biased towards the open or closed position relative to the main body or the first body. Thus, if the angle of rotation between the folder and the main body is in the range of about 40 degrees (see FIGS. 11 and 12) to about 180 degrees (see FIG. 14), the rotation of the folder relative to the main body is biased in an open or closed state. It doesn't work.

As shown in FIG. 15, one or both of the second arms 154, 158 of the links 148, 150 may have hooks 194 and one or two of the fixed shaft guides 176, 178. All may have corresponding hooks 196. In a 180 degree rotation, the hooks 194, 196 can be fastened or hooked together, such that the terminal remains open. Therefore, the disclosed embodiments freely select the opening angle (rotational angle of the terminal bodies relative to each other) by the user within a predetermined range (for example, in the range of about 40 to about 180 degrees or other range depending on the specific shape of the camp profile). And a hinge assembly to be configured.

In this specification and claims, terms such as “process” or “step” may be used to refer to one action or a plurality of actions. In addition, the performance of these processes and steps need not necessarily be time series.

Exemplary embodiments are provided so that the description of the present invention may be thorough, and to fully convey the scope to those skilled in the art. In order to provide a thorough understanding of embodiments of the present invention, numerous specific details are disclosed, such as examples of specific components, devices, and methods. It will be apparent to those skilled in the art that these specific details need not be employed and that the embodiments may be embodied in many different forms and none should be inferred as limiting the scope of the invention. In some embodiments, well known processes, well known device structures and well known techniques are not described in detail.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprising", "comprising" and "having" are inclusive and thus describe the existence of stated features, components, steps, actions, components or parts, It does not exclude the presence or addition of other features, components, steps, actions, components, parts, or groups thereof. The method steps, processes, and actions described herein are not to be inferred that they must be performed in the particular order discussed or illustrated unless specifically identified as the order of execution. It should also be understood that additional or alternative steps may be employed. As used herein, the term "and / or" includes any and all combinations of the items listed in relation.

The terms first, second, etc. may be used herein to describe various components, parts, regions, layers, or parts, but such components, parts, regions, layers, or parts may be used herein. It should not be limited to terms. These terms may only be used to identify one component, part, region, hierarchy or portion with another region, hierarchy or portion. Terms such as "first", "second", and other ordinal terms, as used herein, do not mean an order or sequence unless explicitly indicated by the context. Thus, a first component, part, region, hierarchy or part may be referred to as a second component, component, region, hierarchy or part without departing from the teachings of the embodiments.

The foregoing description of the embodiments of the invention has been presented for the purposes of illustration and description. The foregoing description is not intended to be exhaustive or to limit the invention. Individual components or features of a particular embodiment are not limited to this particular embodiment, but may be used in a compatible or selected embodiment, even if not shown or described in detail, if applicable. They can also be modified in many ways. Such modifications should not be considered outside the scope of the present invention, and all such modifications are intended to be included within the scope of the invention.

The drawings described herein are for the purpose of describing selected embodiments only and are not intended to describe all possible embodiments, and are not intended to limit the scope of the present invention.

1 is a perspective view of a hinge module used for a mobile communication terminal hinge-coupled first and second bodies of a terminal according to an exemplary embodiment of the present invention;

Figure 2 is an exploded perspective view of the hinge assembly shown in Figure 1,

3 is a perspective view showing first and second links of the hinge assembly of FIG. 2 facing each other and having first and second arms, respectively;

4 is a perspective view of the first and second links of FIG. 3 with a central shaft interposed therebetween to rotatably couple the first and second links to form a linkage assembly;

5 is a perspective view illustrating a spring shaft coupled to a slide cam to form a slide cam assembly, and a fixed slot of a slide cam positioned at an end thereof and aligned to engage a guide of the frame assembly;

6 is a perspective view illustrating a fixing shaft guide coupled to the link assembly of FIG. 4 and a fixing shaft inserted into the second arms of the first and second links of the link assembly of FIG.

FIG. 7 shows the slide shaft inserted into the slots of the first and second frame assemblies and frame assembly of FIG. 2 coupled to (eg, riveted to the frame assembly) of FIG. 2 and the link assembly of FIG. Perspective view showing a first arm of a first and a second link of

8 is a perspective view of the first and second spring shaft plates mounted to the corresponding first and second frame assemblies to support or secure the spring shafts to the corresponding frame assemblies;

9 is a perspective view of the hinge assembly shown in FIG. 2 in which the first and second spring shaft plates and the fixed shaft guide are riveted to the first and second frame assemblies and in a closed position;

FIG. 10 is a side view of the hinge assembly of FIG. 9 showing the inflection point of the camp profile of the slide cam assembly in contact with the concave point of the camp profile of the second arm of the first and second links of the link assembly; FIG.

11 is a perspective view of the hinge assembly of FIG. 9 partially open at an angle of about 40 degrees;

12 is a partial side view of the hinge assembly of FIG. 11 showing the camp profile inflection point of the slide cam assembly in contact with the convex point of the camp profile of the second arm of the first link of the link assembly;

13 is a perspective view of the hinge assembly of FIG. 9 fully open at an angle of about 180 degrees;

FIG. 14 is a side view of the hinge assembly of FIG. 11 showing the camp profile inflection point of the slide cam assembly in contact with the convex point of the camp profile of the second arm of the first and second links of the link assembly; FIG.

FIG. 15 is a side view of the hinge assembly of FIG. 14 with a portion removed to show the hook of the second arm that engages the hook of the fixed shaft guide and holds the hinge assembly open. FIG.

<Description of Signs of Major Parts of Drawings>

118, 120: frame assembly 122, 124, 126, 128: frame member

152. 154, 156, 158: arms 148, 150: link

137, 146: Slide shaft 139, 147: Fixed shaft

160, 162: slide cam 166: center shaft

164, 168: spring shaft 176, 178: fixed shaft guide

172, 174: spring shaft plate 130, 134, 138: slot

132, 136: through hole 180: fixed slot

182: Guide 184: Camp Profile of the Second Arm

186: recess 188: convex

190: camp profile of the slide cam 192: inflection

Claims (25)

A hinge assembly for hinge-engaging the first body and the second body such that the first body hinges relative to the second body to open and close the mobile communication device, A first frame assembly formed to be coupled to the first body; A second frame assembly formed to be coupled to the second body; First and second links, each having a first arm and a second arm having a camp profile, rotatably coupled by a central shaft to be rotatable relative to each other; First and second slide cams each having a camp profile in contact with a camp profile of the second arm of the first and second links, respectively, and contacting the first arm of each of the first and second links; ; And A biasing force coupled to the corresponding first and second slide cams and corresponding first and second frame assemblies to the second arms of the first and second links of the first and second slide cams; And providing first and second spring shafts, The first and second spring shafts provide a force to bias and hold the first and second frame assemblies in the closed position when the hinge assembly is in the closed position, When the hinge assembly is at the opening angle, a friction force that cancels the biasing force of the first and second spring shafts is generated so that the hinge assembly is maintained at the opening angle. Hinge assembly. The method of claim 1, The opening angle is an angle in the range of 40 degrees to 180 degrees Hinge assembly. The method of claim 1, The camp profile of the second arm has a concave portion and a convex portion, The camp profiles of the first and second slide cams have an inflection portion, The inflection portion contacts the recess when the hinge assembly is in the closed position. Hinge assembly. The method of claim 3, When the closed hinge assembly is opened at an opening angle, the inflection portion is separated from the recess and contacts the convex portion. Hinge assembly. The method of claim 3, The camp profile of the second arm of the first and second links is forced to slide the corresponding first and second slide cams to deform the first and second spring shafts and generate the biasing force. Formed Hinge assembly. The method of claim 3, The convex portion is inclined 20 degrees with respect to the horizontal plane Hinge assembly. The method of claim 1, A first spring shaft plate coupled to the first frame assembly and supporting an end of the first spring shaft; A second spring shaft plate coupled to the second frame assembly to support an end of the second spring shaft; Hinge assembly. The method of claim 1, Each of the first and second frame assemblies includes first and second frames assembled to each other. Hinge assembly. The method of claim 1, The first and second frame assembly has a slot and a through hole at each end, The hinge assembly, A first slide shaft having an end portion received in the slot of the first frame assembly and a center portion received in the first arm of the first link; A first fixed shaft having an end portion received in the through hole of the first frame assembly and a center portion received in the second arm of the first link; A second slide shaft having an end portion received in the slot of the second frame assembly and a center portion received in the first arm of the second link; And A second fixed shaft having an end portion received in the through hole of the second frame assembly and a center portion received in the second arm of the second link; Further comprising Hinge assembly. 10. The method of claim 9, A first fixed shaft guide mounted to the first frame assembly to guide the first fixed shaft to the second arm of the first link and to support an end of the first spring shaft; And a second fixed shaft guide mounted to the second frame assembly to guide the second fixed shaft to the second arm of the second link and to support an end of the second spring shaft. Hinge assembly. The method of claim 10, The second arm of at least one of the first and second links has a hook, At least one of the first and second fixed shaft guides includes a hook for engaging the hook of the second arm when the hinge assembly is in an open state to maintain the hinge assembly in the open state. Hinge assembly. 10. The method of claim 9, The friction force is generated between the slots of the first and second frame assemblies corresponding to the first and second slide shafts by the biasing force applied by the first and second spring shafts. Hinge assembly. The method of claim 1, The first frame assembly has a guide, The second frame assembly has a guide, The first slide cam has a fixing slot which can be engaged with the guide of the first frame assembly; The second slide cam has a fixed slot that can be engaged with the guide of the second frame assembly. Hinge assembly. The method of claim 1, The first and second spring shafts include a wire spring Hinge assembly. The method of claim 1, The frictional force cancels the biasing force when the first body is opened at an angle between 40 degrees and 180 degrees with respect to the second body to maintain the first body at the angle with respect to the second body. Hinge assembly. The hinge assembly of claim 1, And a user input device coupled to one of the first and second bodies and a display coupled to the other of the first and second bodies. Folder type mobile communication device. Hinge assembly for hinge coupling the first body and the second body, A first frame assembly formed to be coupled to the first body; A second frame assembly formed to be coupled to the second body; First and second links rotatably coupled by a central shaft so as to be rotatable with respect to each other, each having a first arm and a second arm having a camp profile having a recess and a convex; First and second contacts having a camp profile respectively in contact with said camp profile of said second arm of said first and second links, said first profile contacting said first arm of each of said first and second links; 2 slide cams; First and second spring shafts coupled to the corresponding first and second slide cams and corresponding first and second frame assemblies; A first slide shaft having an end portion engaged with the first frame assembly and a center portion received in the first arm of the first link; And A second slide shaft having an end portion engaged with the second frame assembly and a central portion received in the first arm of the second link, The camp profile of each of the second arms of the first and second links is urged to slide the corresponding first and second slide cams to deform the first and second spring shafts and the first and second Is configured to generate a force biasing the frame assembly to the closed position, When the first frame assembly moves open from the closed position relative to the second frame assembly, an inflection portion separates from the concave portion and contacts the convex portion, and the first and second slide shafts and the corresponding the A friction force that cancels the biasing force is generated between the first and second frame assemblies to maintain the first frame assembly at the open angle with respect to the second frame assembly. Hinge assembly. The method of claim 17, The frictional force is configured to cancel the biasing force when the first body is opened at an angle between 40 degrees and 180 degrees with respect to the second body. Hinge assembly. The method of claim 17, The convex portion is inclined 20 degrees with respect to the horizontal plane Hinge assembly. The method of claim 17, A first spring shaft plate coupled to the first frame assembly to support an end of the first spring shaft; A second spring shaft plate coupled to the second frame assembly to support an end of the second spring shaft; A first fixed shaft guide mounted to the first frame assembly to guide the first fixed shaft to the second arm of the first link and to support an end of the first spring shaft; And And a second fixed shaft guide mounted to the second frame assembly to guide the second fixed shaft to the second arm of the second link and to support an end of the second spring shaft. Hinge assembly. The method of claim 17, Each of the first and second frame assemblies includes a slot and a through hole at each end thereof. The first slide shaft has an end portion received in the slot of the first frame assembly and a central portion received in the first arm of the first link, The second slide shaft has an end portion received in the slot of the second frame assembly and a central portion received in the first arm of the second link, The frictional force is generated by the biasing force applied by the first and second spring shafts between the first and second frame assemblies corresponding to the first and second slide shafts, The first fixed shaft has an end portion accommodated in the through hole of the first frame assembly and a central portion accommodated in the second arm of the first link. The second fixed shaft includes an end portion accommodated in the through hole of the second frame assembly and a center portion received in the second arm of the second link. Hinge assembly. The method of claim 17, The second arm of at least one of the first and second links has a hook, At least one of the first and second fixed shaft guides includes a hook that engages with the hook of the second arm to hold the hinge assembly in the open state when the hinge assembly is opened. Hinge assembly. The method of claim 17, The first frame assembly has a guide, The second frame assembly has a guide, The first slide cam has a fixing slot which can be engaged with the guide of the first frame assembly; The second slide cam has a fixed slot that can be engaged with the guide of the second frame assembly. Hinge assembly. The method of claim 17, The first and second spring shafts include a wire spring Hinge assembly. The hinge assembly of claim 17, And a user input device coupled to one of the first and second bodies and a display coupled to the other of the first and second bodies. Folder type mobile communication device.

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