KR102621889B1 - Structure of Hinge and foldable electronic device including the same - Google Patents

Abstract

The present invention includes rotating members connected to housing parts, arm parts connected to the rotating members, and rotating axes disposed on the arm parts, and at least one of the arm parts has fastening holes spaced at a predetermined distance. each includes arm cam structures formed, and the rotation axis inserted into the fastening holes includes flat areas and curved areas in the shape of the surface viewed in the direction of the inserted axis, and the rotation axis is connected to one of the fastening holes. Disclosed is a foldable electronic device in which a first thickness of a first portion at least partially disposed within a hole and a second thickness of a second portion at least partially disposed within another of the fastening holes are formed differently.

Description

Hinge structure and foldable electronic device including the same {Structure of Hinge and foldable electronic device including the same}

Various embodiments of this document relate to a foldable electronic device including a hinge structure.

Portable electronic devices such as smartphones can provide various functions such as calls, video playback, and Internet search based on various types of applications. The user may wish to use the various functions described above through a wider screen. However, as the screen gets larger, portability may decrease. Accordingly, foldable portable electronic devices that can increase portability by utilizing a folding structure are being developed.

A foldable electronic device may have a hinge structure connected to adjacent housings, and may be arranged to rotate while the hinge structure supports the housings while the housings rotate at a predetermined angle.

The foldable electronic device may include a hinge structure so that it can be folded. The hinge structure may be arranged to connect at least two housing portions. Various joints may occur in the hinge structure due to the force applied to the hinge structure while the housing parts are in a folded or unfolded state in relation to the hinge operation.

In addition, foldable electronic devices currently on the market are thick, so there is a demand for the development of a foldable electronic device that has a slimmer form and is capable of natural hinge operation.

Various embodiments of the present invention provide a hinge structure with reduced noise generation and a foldable electronic device including the same.

Various embodiments provide a hinge structure that has a slimmer structure and can stably provide various mounting angles, and a foldable electronic device including the same.

A foldable electronic device (or a portable electronic device, a portable communication device, a foldable electronic device, or a foldable electronic device with a communication function) according to various embodiments of the present invention includes rotating members connected to housing parts, the rotating members It includes arm parts connected to and rotation axes disposed on the arm parts, at least one of the arm parts includes arm cam structures each having fastening holes spaced apart from each other at a predetermined interval, and the rotation axis inserted into the fastening holes is , the shape of the surface viewed in the direction of the insertion axis includes flat areas and curved areas, and the rotation axis is the first thickness of the first portion at least partially disposed in one of the fastening holes and the fastening holes. The second thickness of the second portion, at least partially disposed within the other fastening hole, may be formed differently.

A hinge structure and a foldable electronic device including the same according to various embodiments can support a more natural hinge operation by reducing the generation of noise in the hinge structure.

Additionally, the hinge structure according to the embodiment and the foldable electronic device including the same can stably provide various mounting angles while providing a slimmer structure.

In addition, the hinge structure according to the embodiment and the foldable electronic device including the same allow the hinge structure connected to the housing parts to have a symmetrical structure with respect to the longitudinal axis of the hinge housing, thereby transmitting force between the housing parts. Alternatively, the balance of forces can be improved.

In addition, the hinge structure according to the embodiment and the foldable electronic device including the same can provide a structure with more accurate dimensions by reducing twisting during the manufacturing process.

In addition, various purposes and effects provided by the arm structure and hinge structure according to various embodiments and electronic devices including the same may be mentioned according to the embodiments of the detailed description.

FIG. 1A is a diagram illustrating an exploded perspective view of an electronic device according to various embodiments.
FIG. 1B is a diagram illustrating an example of the back of an electronic device according to various embodiments.
FIG. 1C is a diagram illustrating an example of a folded state of an electronic device according to various embodiments.
FIG. 2 is a diagram illustrating an example of the front and back sides of a hinge structure of a foldable electronic device according to various embodiments.
FIG. 3 is a diagram showing a surface in a first direction of an exploded perspective view of a hinge structure according to various embodiments.
FIG. 4 is a diagram showing a surface in a second direction of an exploded perspective view of a hinge structure according to various embodiments.
Figure 5 is a diagram showing an example of a second rotation axis according to an embodiment.
Figure 6 is a diagram showing an example of a dark portion according to an embodiment.
Figure 7 is a diagram showing an example of a cross section along the AA′ cutting line on one side of the arm portion according to an embodiment.
FIG. 8 is a diagram illustrating an example of a cross section of cam structures in a coupled state to the second arm portion and the second rotation shaft according to an embodiment.
Figure 9 is a diagram showing an example of a process of combining the second arm and the second rotation shaft according to an embodiment.
Figure 10 is a diagram showing an example of a process for combining a second arm and a second rotation shaft according to another embodiment.
FIG. 11 is a diagram illustrating a first state of some components of an electronic device according to various embodiments of the present disclosure.
FIG. 12 is a diagram illustrating a first angle state of some structures of an electronic device according to various embodiments of the present disclosure.
FIG. 13 is a diagram illustrating a second angle state of a first hinge structure according to various embodiments.
FIG. 14 is a diagram illustrating a second state of some structures of an electronic device according to various embodiments of the present disclosure.
Figure 15 is a diagram showing an example of another shape of the second arm portion according to various embodiments.
Figure 16 is a diagram showing an unfolded state of an electronic device to which a different type of dark portion is applied.
Figure 17 is a diagram showing a folded state of an electronic device to which a different type of arm part is applied.
FIG. 18 is a diagram illustrating an example of a foldable electronic device including the arrangement of gears according to various embodiments.
FIG. 19 is a diagram illustrating another example of a hinge structure applied to a foldable electronic device according to various embodiments.
Figure 20 is a diagram showing an example of a first type cam device according to various embodiments.
Figure 21 is a diagram showing the shape of a second type cam device according to various embodiments.
FIG. 22 is a diagram illustrating cam structures and cam member contact states of a first type cam device and a second type cam device according to various embodiments.
Figure 23 is a diagram showing an unfolded state of a first type hinge structure according to an embodiment.
Figure 24 is a diagram showing a folded state of a first type hinge structure according to an embodiment.
Figure 25 is a diagram showing an unfolded state of a second type hinge structure according to an embodiment.
Figure 26 is a diagram showing a folded state of a second type hinge structure according to an embodiment.
FIG. 27 is a diagram showing changes in the state and torque magnitude of cam devices according to the folding angle of a foldable electronic device to which a first type hinge structure is applied according to an embodiment.
FIG. 28 is a diagram showing changes in the state and torque magnitude of cam devices according to the folding angle of a foldable electronic device to which a second type hinge structure is applied according to an embodiment.
Figure 29 is a diagram showing another example of a cam shape according to various embodiments.
FIG. 30 is a diagram illustrating an example of a contact state between a cam and some mountains of a cam structure according to various embodiments.

Hereinafter, various embodiments of this document are described with reference to the attached drawings. However, this is not intended to limit the technology described in this document to specific embodiments, and should be understood to include various modifications, equivalents, and/or alternatives to the embodiments of this document. . In connection with the description of the drawings, similar reference numbers may be used for similar components.

In this document, expressions such as “have,” “may have,” “includes,” or “may include” refer to the presence of the corresponding feature (e.g., a numerical value, function, operation, or component such as a part). , and does not rule out the existence of additional features.

In this document, expressions such as “A or B,” “at least one of A or/and B,” or “one or more of A or/and B” may include all possible combinations of the items listed together. . For example, “A or B”, “at least one of A and B”, or “at least one of A or B” (1) includes at least one A, (2) includes at least one B, or (3) it may refer to all cases including both at least one A and at least one B.

As used herein, expressions such as "first", "second", "first", or "second" may describe various elements in any order and/or importance, and may refer to one element as another. It is only used to distinguish from components and does not limit the components. For example, a first user device and a second user device may represent different user devices regardless of order or importance. For example, a first component may be renamed a second component without departing from the scope of rights described in this document, and similarly, the second component may also be renamed the first component.

A component (e.g., a first component) is “(operatively or communicatively) coupled with/to” another component (e.g., a second component). When referred to as being “connected to,” it should be understood that any component may be directly connected to the other component or may be connected through another component (eg, a third component). On the other hand, when a component (e.g., a first component) is said to be “directly connected” or “directly connected” to another component (e.g., a second component), It may be understood that no other component (e.g., a third component) exists between other components.

The expression "configured to" used in this document may mean, for example, "suitable for," "having the capacity to," depending on the context. It can be used interchangeably with ", "designed to," "adapted to," "made to," or "capable of." The term “configured (or set to)” may not necessarily mean “specifically designed to” in hardware. Instead, in some contexts, the expression “a device configured to” may mean that the device is “capable of” working with other devices or components. For example, the phrase "processor configured (or set) to perform A, B, and C" refers to a processor dedicated to performing the operations (e.g., an embedded processor), or by executing one or more software programs stored on a memory device. , may refer to a general-purpose processor (e.g., CPU or application processor) capable of performing the corresponding operations.

Terms used in this document are merely used to describe specific embodiments and may not be intended to limit the scope of other embodiments. Singular expressions may include plural expressions, unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by a person of ordinary skill in the technical field described in this document. Among the terms used in this document, terms defined in general dictionaries may be interpreted to have the same or similar meaning as the meaning they have in the context of related technology, and unless clearly defined in this document, have an ideal or excessively formal meaning. It is not interpreted as In some cases, even terms defined in this document cannot be interpreted to exclude embodiments of this document.

Electronic devices according to various embodiments of this document include, for example, a smartphone, a tablet personal computer, a mobile phone, a video phone, an e-book reader, Desktop personal computer (laptop personal computer), netbook computer, workstation, server, personal digital assistant (PDA), portable multimedia player (PMP), MP3 player, mobile medical It may include at least one of a device, a camera, or a wearable device. According to various embodiments, the wearable device may be an accessory (e.g., a watch, ring, bracelet, anklet, necklace, glasses, contact lenses, or a head-mounted-device (HMD)), a fabric or clothing piece ( It may include at least one of a body attachable type (e.g. electronic clothing), a body attachable type (e.g. a skin pad or tattoo), or a bioimplantable type (e.g. an implantable circuit).

Hereinafter, electronic devices according to various embodiments will be described with reference to the accompanying drawings. In this document, the term user may refer to a person using an electronic device or a device (e.g., an artificial intelligence electronic device) using an electronic device.

FIG. 1A is a diagram illustrating an exploded perspective view of a foldable electronic device according to various embodiments, FIG. 1B is a diagram illustrating an example of the back of a foldable electronic device according to various embodiments, and FIG. 1C is a diagram illustrating an exploded perspective view of a foldable electronic device according to various embodiments. This diagram shows an example of a folded state of a foldable electronic device.

1A to 1C, a foldable electronic device 100 (or electronic device, or flexible display device, or flexible & foldable electronic device) according to an embodiment includes a housing 101 (e.g., a first housing) portion 110, second housing portion 120), hinge housing 150 (or hinge cover, or hinge case), hinge structure 200 (e.g., first hinge structure 200a, second hinge structure) (200b)) and a display 160 (or flexible display, display module) that is at least partially disposed in the front direction (eg, z-axis direction) of the hinge structure 200. Additionally and alternatively, the electronic device 100 includes a first cover 119 and a second housing portion 120 that cover at least a portion of the rear surface (e.g., the side facing the -z axis direction) of the first housing portion 110. ) may further include a second cover 129 that covers at least a portion of the rear surface (e.g., the side facing the -z axis direction). Alternatively, the first cover 119 may form a rear surface integrally with the first housing part 110, and the second cover 129 may form a rear surface integrally with the second housing part 120. can do.

The housing 101 may be composed of at least one pair that can rotate about a certain axis. For example, housing 101 may include a first housing portion 110 and a second housing portion 120 . The first housing part 110 is arranged continuously with the second housing part 120 depending on the arrangement (e.g., when the center 163 of the display 160 is flattened or the housing 101 is unfolded) state), it may be arranged parallel to the second housing portion 120. Alternatively, when the center 163 of the display 160 is folded, one surface of the first housing part 110 may be arranged to face one surface of the second housing part 120.

For example, at least a portion of the first housing portion 110 may be made of a metallic material, or at least a portion may be made of a non-metallic material. The first housing portion 110 may be formed of a material having a certain level of rigidity so as to support at least a portion of the display 160. One area of the display 160 (e.g., at least a portion of the first portion 161 of the display 160 and at least a portion of one side of the central portion 163) may be disposed on at least a portion of the front surface of the first housing portion 110. there is. At least a portion of the first housing portion 110 may be adhered to the first portion 161 of the display 160. Alternatively, at least a portion of the front edge of the first housing portion 110 may be adhered to an edge of the first portion 161 of the display 160. Alternatively, at least a portion of the front surface (eg, a surface in the z-axis direction) of the first housing portion 110 may be adhered to at least a portion of the first portion 161 of the display 160 . In this regard, an adhesive layer may be disposed at least partially between the first housing portion 110 and the first portion 161 of the display 160. At least a portion of the inside of the first housing portion 110 is provided in a hollow form or is provided in a hollow form while being combined with the first cover 119 to provide electronic elements necessary for driving the electronic device 100 (e.g., printing Elements such as a circuit board, at least one processor mounted on the printed circuit board, at least one memory, and a battery) may be disposed.

According to various embodiments, the edge ends of the first housing part 110 (e.g., the remaining three edge ends excluding the edge facing the second housing part 120 when the electronic device 100 is unfolded) The display 160 may protrude by a specified height from the central bottom surface of the housing to surround at least one edge. Alternatively, side walls that at least partially face the edge of the display 160 may be disposed on at least one of the edge ends of the first housing portion 110. The side walls formed on at least a portion of the edge of the first housing part 110 may be formed to have a designated height at the remaining three edges excluding the edge facing the second housing part 120. An edge portion of the first housing portion 110 facing the second housing portion 120 may include a recessed portion having a certain curvature so that at least a portion of the hinge housing 150 can be disposed. . For example, the first housing part 110 has a first step 111 at an edge facing the second housing part 120, where a part of the first hinge structure 200a located in the hinge housing 150 is located. And it may include a second step portion 112 on which a portion of the second hinge structure 200b located in the hinge housing 150 is disposed.

According to various embodiments, the second housing part 120 is arranged in parallel with the first housing part 110, or has at least one side of the first housing part 110 (e.g., display 160). It can be arranged to face the surface on which is placed. For example, the second housing part 120 may be made of the same material as the first housing part 110. As the second housing part 120 is arranged to be symmetrical left and right or up and down with the first housing part 110, the remaining part of the area disposed in the first housing part 110 of the display 160 is on the front side. (e.g., at least a portion of the second portion 162 of the display 160 and at least a portion of the other side of the central portion 163). At least a portion of the second housing portion 120 may be adhered to the second portion 162 of the display 160. Alternatively, the front edge of the second housing portion 120 may be adhered to the edge of the second portion 162 of the display 160 . Alternatively, one side of the front lower part of the second housing part 120 may be adhered to one side of the second part 162 of the display 160. In this regard, an adhesive layer may be disposed at least partially between the second housing portion 120 and the second portion 162 of the display 160. At least a portion of the inside of the second housing part 120 is provided in a hollow form similar to the first housing part 110, or is provided in a hollow form while being combined with the second cover 129 to drive the electronic device 100. The necessary electronic elements can be placed. According to various embodiments, a camera 190 may be placed on the rear of the second housing portion 120, and in relation to the placement of the camera 190, the camera 190 may be placed on the second cover 129. A hole may be formed.

According to various embodiments, the edge ends of the second housing part 120 (e.g., the remaining three edge ends excluding the edge facing the first housing part 110) are configured to surround the other edge of the display 160. It may protrude from the central bottom surface of the second housing portion 120 by a specified height. Alternatively, similar to the side walls formed in the first housing part 110, side walls that at least partially face the edge of the display 160 may be disposed on at least one of the edge ends of the second housing part 120. there is. The side walls formed on at least a portion of the edge of the second housing part 120 may be formed to have a designated height at the remaining three edges excluding the edge facing the first housing part 110.

According to various embodiments, the portion of the second housing portion 120 that faces the first housing portion 110 may include a recessed portion at least partially having a certain curvature so that the hinge housing 150 can be disposed. You can. For example, the second housing part 120 has a third step 121 on which a part of the hinge housing 150 on which the first hinge structure 200a is mounted is disposed at an edge facing the first housing part 110. And it may include a fourth step portion 122 where a portion of the hinge housing 150 on which the second hinge structure 200b is mounted is disposed.

According to various embodiments, the electronic device 100 may include at least one sensor disposed on one side of the first housing portion 110 or the second housing portion 120. The sensor may include, for example, at least one of a proximity sensor, an illumination sensor, an iris sensor, an image sensor (or camera), or a fingerprint sensor.

According to various embodiments, the hinge housing 150 is covered by one side of the first housing part 110 and the second housing part 120 (e.g., the housing part 150) depending on the folded or unfolded state of the electronic device 100. (e.g., in an unfolded state of the housing 101) or exposed to the outside (e.g., in a folded state of the housing 101). For example, when the first housing portion 110 and the second housing portion 120 are arranged side by side, the hinge housing 150 may be obscured by the first housing portion 110 and the second housing portion 120. there is. When one side of the first housing part 110 and one side of the second housing part 120 are arranged to face each other, the hinge housing 150 is positioned on one side of the first housing part 110 and the second housing part 120. It may be arranged so that at least a portion of the edge (eg, the edge where the first housing portion 110 and the second housing portion 120 face each other in the unfolded state) is exposed to the outside. The hinge housing 150 may have side walls arranged so that at least a portion of the interior is empty and at least portions of both edges (eg, edges in the x-axis and -x-axis directions) are closed. At least one boss coupled to the first hinge structure 200a and the second hinge structure 200b may be disposed on at least a portion of the inner surface of the hinge housing 150.

According to various embodiments, at least a portion of the display 160 may have flexibility. According to one embodiment, the display 160 includes a first part 161 or a first region disposed on the first housing portion 110, and a second portion 162 disposed on the second housing portion 120. ) or a second area and a central portion 163 in which the first housing portion 110 and the second housing portion 120 are adjacent when the electronic device 100 is unfolded and corresponding to the position of the hinge structure 200, or It may include a central area. According to various embodiments, the entire display 160 may have flexibility. Alternatively, at least a portion of the center 163 of the display 160 may be flexible. The central portion 163 of the display 160 may be positioned so that the first housing portion 110 and the second housing portion 120 are not adhered to each other. For example, the center 163 of the display 160 may be spaced apart from the front side (eg, the surface in the z-axis direction) of the hinge structure 200 when the electronic device 100 is folded. The first portion 161 of the display 160 is bonded to at least a portion of the first housing portion 110, and the second portion 162 of the display 160 is bonded to at least a portion of the second housing portion 120. can be bonded with In this regard, adhesive layers may be disposed on at least a partial area between the display 160 and the first housing part 110 and at least a partial area between the display 160 and the second housing part 120. The display 160 may include various layers. For example, the display 160 has an external protective layer (or glass layer or polymer layer) that has a certain amount of transparency and is larger than a specified size, a display panel layer disposed below the external protective layer to display a screen, and a display panel layer below the display panel layer. It may include a first back layer disposed. The first back layer may include a shock absorption layer (or embossing) and a heat dissipation layer (or metal sheet layer). Additionally or alternatively, the first back layer may further include an electromagnetic induction panel (eg, digitizer). According to various embodiments, the display 160 may further include a second back layer disposed below the first back layer. The second back layer may include at least one metal layer (or metal sheet) at least partially made of a metal material. At least a portion of the second back layer may include a designated pattern (eg, lattice pattern, slit pattern) so that it can be bent. Alternatively, at least a portion of the second back layer may be formed of another bendable material (eg, polymer material, rubber, leather material).

According to various embodiments, at least one hinge structure 200 may be arranged based on the x-axis direction. For example, the Korean paper structure 200 may include a first hinge structure 200a and a second hinge structure 200b. The hinge structure 200 includes a first part 200_1 disposed inside the hinge housing 150, and a periphery that is disposed above the hinge housing 150 or does not overlap the hinge housing 150 based on the z-axis. It may include a second part 200_2 corresponding to the structure (eg, a structure coupled to the first housing part 110 and the second housing part 120). Among the first portions of the hinge structure 200, at least a portion of the first hinge structure 200a is located on the first inner side of the hinge housing 150 (e.g., a region within the hinge housing 150 that is biased in the x-axis direction). can be placed in Among the first portions of the hinge structure 200, at least a portion of the second hinge structure 200b is located on the second inner side of the hinge housing 150 (e.g., a region within the hinge housing 150 that is biased in the -x-axis direction). ) can be placed in. At least a portion of the second portion of the hinge structure 200 may rotate in response to the rotational motion of the first housing portion 110 and the second housing portion 120 . At least one of the first hinge structure 200a and the second hinge structure 200b according to one embodiment may include a plurality of detent structures.

FIG. 2 is a diagram illustrating an example of the front and rear surfaces of a hinge structure of a foldable electronic device according to various embodiments, and FIG. 3 is a diagram illustrating a first direction surface of an exploded perspective view of a hinge structure according to various embodiments. , FIG. 4 is a view showing a surface in a second direction of an exploded perspective view of a hinge structure according to various embodiments.

1A to 4, the electronic device 100 according to one embodiment may include a plurality of hinge structures 200, and the first hinge structure 200a and the second hinge structure 200b have similar structures. It can have a structure and shape. The following description will be based on the first hinge structure 200a. Figure 1a shows a structure in which the first hinge structure 200a and the second hinge structure 200b are disposed in the hinge housing 150, but the present invention is not limited thereto, and three or more hinge structures may be installed in the hinge housing ( 150).

According to various embodiments, the first hinge structure 200a includes rotating members 211 and 212, a fixing bracket 213, arm portions 221 and 222, and idle gears 233. , 234) and a multiple detent structure 240.

According to various embodiments, the rotating members 211 and 212 may form a driving trajectory of the display 160. The rotating members 211 and 212 may include a first rotating member 211 coupled to one side of the fixing bracket 213 and a second rotating member 212 coupled to the other side of the fixing bracket 213. The first rotating member 211 may rotate (for example, clockwise or counterclockwise about the x-axis) within a first angle range while being coupled to one side of the fixing bracket 213. The second rotating member 212 may rotate (for example, counterclockwise or clockwise about the x-axis) within a second angle range while being coupled to one side of the fixing bracket 213. The first angle range and the second angle range may have the same size and opposite directions. When the electronic device 100 is in an unfolded state, the -y-axis direction edge of the first rotating member 211 may be disposed adjacent to the y-axis direction edge of the second rotating member 212. When the electronic device 100 is in a folded state, the upper surface of the first rotating member 211 (e.g., the side facing the z-axis direction) and the upper surface of the second rotating member 212 (e.g., the side facing the z-axis direction) The facing sides) may be arranged to face each other. The first rotating member 211 rotates within a certain angle range (e.g., within 0 degrees to 100 degrees or within 0 degrees to 95 degrees) around the third axis (13 in FIG. 14) (or a virtual axis). You can exercise. The second rotating member 212 is within a certain angle range (e.g., within 0 degrees to -100 degrees or within 0 degrees to -95 degrees) around the fourth axis (14 in FIG. 14) (or a virtual axis). Rotational movement is possible. The third axis 13 and the fourth axis 14 may be spaced apart from each other at a certain interval. The third axis 13 and the fourth axis 14 may be located above the first axis 11 and the second axis 12 based on the z-axis.

According to various embodiments, at least a portion of the fixing bracket 213 may be placed and fixed in an empty space inside the hinge housing 150. In this regard, at least a portion of the fixing bracket 213 may have a size corresponding to the empty space inside the hinge housing 150. Additionally, at least a portion of the fixing bracket 213 may have a shape corresponding to the empty space inside the hinge housing 150, for example, a semi-cylindrical shape. The fixing bracket 213 may include at least one hole into which at least one boss formed in the hinge housing 150 can be inserted. One side of the first rotating member 211 may be placed on one side of the fixing bracket 213 to be rotatable within a certain angle range, and the second rotating member 212 may be placed on the other side of the fixing bracket 213. One side of may be arranged to be rotatable within a certain angle range. A portion of the multiple detent structure 240 (e.g., one side of the first rotation axis 231 (or first shaft) and the second rotation axis ( 232) (or one side of the second shaft) and some of the idle gears 233 and 234 may be disposed. According to various embodiments, the first hinge structure 200a is disposed toward the rear of the fixing bracket 213 (e.g., -z-axis direction), and moves from the rear of the fixing bracket 213 (e.g., from the -z axis to the z-axis). It may further include a bracket cover 214 that is fastened to the surface visible when facing.

According to various embodiments, the arm portions (or arm structures) 221 and 222 slide on one side of the rotating members 211 and 212 in response to the rotation of the rotating members 211 and 212 of the electronic device 100. While operating, it rotates about the rotation axes (e.g., the first rotation axis 11 and the second rotation axis 22) and engages with the moving cam members 241a and 241b to implement a detent operation. For example, The arm parts 221 and 222 are connected on one side to the rotating members 211 and 212 through the fastening parts 251 and 252, and as the rotating members 211 and 212 rotate, the rotating members 211, It can move while performing a sliding operation along at least a portion of the side of the foldable electronic device 212. The movable cam members 241a and 241b each have a bridge connecting the cams (e.g., a first movable cam member 241a). It may further include a first bridge connecting the cams of and a second bridge connecting the cams of the second moving cam member 241b.

The arm parts 221 and 222 are, for example, a first arm part 221 connected through the first rotating member 211 and the first fastening part 251, a second rotating member 212, and a second fastening part ( It may include a second arm portion 222 connected through 252).

The first arm portion 221 includes at least one arm cam structure (e.g., the first arm cam structure 221_4a and It includes two arm cam structures (221_4b), and the second arm portion 222 includes at least one arm cam structure (second arm cam structure) engaged with the moving cam members 241a and 241b included in the multiple detent structure 240. It may include a three-arm cam structure (222_4a) and a fourth arm cam structure (222_4b). The first arm cam structure 221_4a and the second arm cam structure 221_4b coupled to the moving cam members 241a and 241b are used during folding and unfolding (or folding and unfolding) operations of the electronic device 100. A cam-type detent can be implemented. The first arm 221 and the second arm 222 are hinged to the electronic device 100 using arm cam structures 221_4a, 221_4b, 222_4a, and 222_4b that engage with the moving cam members 241a and 241b. It can provide force (or a sense of detent). The arm portions 221 and 222 provide a more robust and stable hinge force (or detent feeling) based on the multiple detent structure 240, while providing improved wear resistance and a softer feel through the multiple detent structure 240. Can assist in providing hinge force (or detent feel). According to various embodiments, a protruding structure may be disposed on the arm cam structures 221_4a, 221_4b, 222_4a, and 222_4b to prevent movement of the first and second rotation shafts 231 and 232.

According to various embodiments, the multiple detent structure 240 includes a first rotation axis 231, a second rotation axis 232, a rotation axis support member 235, a stopper 236, a first moving cam member 241a, A second moving cam member (241b), a center bar (243c), a center bracket (243a), an axis bracket (243b), support rings (292_1, 292_2) (support ring), a plurality of fixing clips (291_1, 291_2, 291_3) , 291_4), and may include a plurality of elastic bodies (242a, 242b, 242c, 242d).

According to various embodiments, the first and second rotation shafts 231 and 232 may provide a cam-type hinge force (or detent feel). The first rotation shaft 231 and the second rotation shaft 232 may be formed to have a length longer than the separation distance between the cam structures formed in the arm portions 221 and 222. The first rotation axis 231 and the second rotation axis 232 are arranged to be spaced apart from each other and may be arranged side by side in the x-axis direction. Shaft gears 231_2 and 232_2 are formed on the first and second rotation shafts 231 and 232, respectively, and each of the shaft gears 231_2 and 232_2 has different idle gears (e.g., first idle gears). (233) and may be arranged to engage with the second idle gear (234). Accordingly, the arm parts 221 and 222 of the hinge structure 200 can rotate at the same time and at the same angle in response to the force generated while the first rotating member 211 and the second rotating member 212 rotate. there is. The first rotation axis 231 may rotate around the first axis 11, and the second rotation axis 232 may rotate around the second axis 12.

According to various embodiments, the first rotating shaft 231 includes one side of the rotating shaft support member 235, one side of the stopper 236, one side of the center bracket 243a, one side of the shaft bracket 243b, and a first support ring. (292_1), the first fixing clip (291_1) can be inserted. The first rotation shaft 231 includes a first cam (241a_1a) formed on the first moving cam member (241a), a third cam (241b_1a) formed on the second moving cam member (241b), and a first cam (241b_1a) formed on the first moving cam member (241a). The first arm cam structure 221_4a, the second arm cam structure 221_4b, the first elastic body 242a, and the third elastic body 242c may be inserted. A first shaft gear 231_2 is formed on the first rotation shaft 231, and at least a portion of the first shaft gear 231_2 may be arranged to engage with the first idle gear 233. One end (eg, the end in the x-axis direction) of the first rotation axis 231 may be disposed on one side of the fixing bracket 213 (eg, the end in the -x-axis direction). The first rotation shaft 231 may be formed differently depending on the cross-sectional position in the z-axis direction so that it can be sequentially press-fitted with the first arm cam structure 221_4a and the second arm cam structure 221_4b.

According to various embodiments, the second rotation shaft 232 includes the other side of the rotation shaft support member 235, the other side of the stopper 236, the other side of the center bracket 243a, the other side of the shaft bracket 243b, and the second support ring. (292_2), a second fixing clip (291_2) can be inserted. The second rotation shaft 232 includes a second cam (241a_1b) formed on the first movable cam member 241a, a fourth cam (241b_1b) formed on the second movable cam member 241b, and a second cam of the second arm portion 222. The three arm cam structure 222_4a, the fourth arm cam structure 222_4b, the second elastic body 242b, and the fourth elastic body 242d can be inserted. A second shaft gear 232_2 is formed on the second rotation shaft 232, and at least a portion of the second shaft gear 232_2 may be arranged to engage with the second idle gear 234. One end (eg, the end in the x-axis direction) of the second rotation axis 232 may be disposed on one side of the fixing bracket 213 (eg, the end in the -x-axis direction). The second rotation shaft 232 may be formed differently depending on the cross-sectional position in the z-axis direction so that it can be sequentially press-fitted with the third arm cam structure 222_4a and the fourth arm cam structure 222_4b.

According to various embodiments, the rotation shaft support member 235 includes a first ring 235_1 coupled to the first rotation shaft 231, a second ring 235_2 connected to the second rotation shaft 232, and the first ring. It may include a ring body 235_3 that connects 235_1 and the second ring 235_2 and faces one side of the idle gears 233 and 234. The ring body 235_3 has a first hole 235_3a into which one side of the first idle gear 233 can be inserted and a second hole 235_3b into which one side of the second idle gear 234 can be inserted. It can be included. The rotation shaft support member 235 may be disposed between the stopper 236 and the shaft gears 231_2 and 232_2 formed on the rotation shafts 231 and 232. The rotation axis support member 235 is arranged to surround at least a portion of the idle gears 233 and 234 and can guide the idle gears 233 and 234 so that they do not deviate from their designated positions.

According to various embodiments, the center bar 243c is provided in a bar shape in which the x-axis direction is longer than the y-axis direction, and is disposed between the first rotation axis 231 and the second rotation axis 232, The space between the rotation axis 231 and the second rotation axis 232 can be covered. The center bar 243c may include at least one protrusion formed in the -z-axis direction. The at least one protrusion may be engaged with a hole formed in the center bracket 243a and a hole formed in the shaft bracket 243b. The center bar 243c may be moved in the z-axis or -z-axis direction according to the rotation of the first arm 221 and the second arm 222. For example, the center bar 243c moves in the z-axis direction to support the display 160 when the electronic device 100 is in an unfolded state, and when the electronic device 100 is in a folded state, the center bar 243c moves in the z-axis direction to support the display 160 when the electronic device 100 is folded. In order to secure a distance from the display 160 so that the display 160 is not damaged, the display 160 may move downward a certain distance in the -z-axis direction.

According to various embodiments, the shaft bracket 243b may be disposed between the support rings 292_1 and 292_2 and the first elastic body 242a and the second elastic body 242b. The shaft bracket 243b includes ring-shaped wings that can be inserted into the first and second rotation shafts 231 and 232, and may include a body supporting the wings. The shaft bracket 243b may be fastened to a protrusion formed on the center bar 243c. The shaft bracket 243b can guide the first rotation shaft 231 and the second rotation shaft 232 to maintain a constant distance while rotating.

According to various embodiments, the plurality of fixing clips 291_1, 291_2, 291_3, and 291_4 include a first fixing clip 291_1 coupled to one side (e.g., an end in the -x-axis direction) of the first rotation axis 231. , a second fixing clip 291_2 coupled to one side (e.g., the end in the -x-axis direction) of the second rotation axis 232, and a second fixing clip 291_2 coupled to one side (e.g., the end in the -x-axis direction) of the first fastening part 251. It may include a third fixing clip 291_3 and a fourth fixing clip 291_4 coupled to one side (end in the -x-axis direction) of the second fastening part 252. The first fixing clip 291_1 is inserted into the first rotation shaft 231 (e.g., the first support ring 292_1, one side of the shaft bracket 243b, the first elastic body 242a, and the first cam 241a_1a). , at least one of one side of the center bracket 243a, the third elastic body 242c, the third cam 241b_1a, one side of the stopper 236, and one side of the rotation axis support member 235) is on one side (-x-axis direction) It can play a role in fixing it so that it does not come off. The second fixing clip 291_2 is inserted into the second rotation shaft 232 (e.g., the second support ring 292_2, the other side of the shaft bracket 243b, the second elastic body 242b, and the second cam 241a_1b). , at least one of the other side of the center bracket 243a, the fourth elastic body 242d, the fourth cam 241b_1b, the other side of the stopper 236, and the other side of the rotation axis support member 235) is on one side (-x-axis direction) It can play the role of fixing it so that it does not come off. The third fixing clip 291_3 is a third fixed clip inserted through the first arm 221 and the first rotating member 211 while the first arm 221 is sliding along the side of the first rotating member 211. 1 The fastening portion 251 may serve to prevent the fastening portion 251 from being separated from the first arm portion 221 or the first rotating member 211. The fourth fixing clip 291_4 is a second arm portion disposed to penetrate the second arm portion 222 and the second rotating member 212 while the second arm portion 222 slides along the side of the second rotating member 212. The fastening portion 252 may serve to prevent separation from the second arm portion 222 and the second rotating member 212.

According to various embodiments, the plurality of elastic bodies (242a, 242b, 242c, 242d) are, for example, a first cam (241a_1a) disposed between one side of the shaft bracket (243b) and the first cam (241a_1a) of the first moving cam member (241a). 1 Elastic body (242a), the second elastic body (242b) disposed between the other side of the axis bracket (243b) and the second cam (241a_1b) of the first moving cam member (241a), one side of the center bracket (243a) and the second moving cam A third elastic body 242c disposed between the third cam 241b_1a of the member 241b, the fourth elastic body 242c disposed between the other side of the center bracket 243a and the fourth cam 241b_1b of the second moving cam member 241b. It may include an elastic body (242d). The plurality of elastic bodies 242a, 242b, 242c, and 242d may provide elastic force necessary for cam operation of the first movable cam member 241a and the second movable cam member 241b, respectively. According to one embodiment, the first elastic body 242a and the second elastic body 242b (or the third elastic body 242c) are used to provide the same hinge force (or detent feeling) during the rotation of the electronic device 100. The fourth elastic body 242d) may have the same characteristics. For example, the plurality of elastic bodies 242a, 242b, 242c, and 242d may have a spring structure having the same or similar length, thickness, and diameter. Alternatively, according to various embodiments, the plurality of elastic bodies (242a, 242b, 242c, 242d) have different lengths, thicknesses, and diameters (e.g., the first elastic body (242a) and the second elastic body (242b) are the same or similar. It has a length, a first thickness, and a first diameter, and the third elastic body 242c and the fourth elastic body 242d have the same or similar second length (e.g., a second length different from the first length) and a second thickness ( For example, it may have a second thickness different from the first thickness) and a second diameter (for example, a second diameter different from the second diameter).

As described above, the hinge structures 200a and 200b according to one embodiment are coupled to the hinge housing 150 and the housings 110 and 120 and rotate to participate in the folding or unfolding operation of the display 160 placed on the upper side. The members 211 and 212 and the multiple detent structure 240 connected to the rotating members 211 and 212 support simultaneous rotation of the first housing portion 110 and the second housing portion 120. It may include a gear structure (eg, a shaft gear of the first rotation shaft 231, a shaft gear of the second rotation shaft 232, and idle gears 233 and 234).

Based on this, the hinge structures 200a and 200b are based on a virtual axis (or the third axis 13 and the fourth axis 14) formed above the surfaces of the rotating members 211 and 212. The display 160 can be folded or unfolded by rotating, provides an improved sense of detent based on a plurality of cam structures, and has a gear structure (e.g., an axis gear on the first rotation axis 231, a second rotation axis 232). ) Supports simultaneous hinge operation of the housings 110 and 120 based on the axis gear and idle gears 233 and 234), thereby suppressing the twisting of the housings 110 and 120 during the hinge operation process. there is. In addition, the hinge structures 200a and 200b are used not only in the unfolded or folded state of the housings 110 and 120, but also at a certain angle, such as 30 degrees to 60 degrees (e.g., between the front side of the first housing portion 110 and the second housing portion 110). It can support temporary fixation states, including a partially folded state between the two housing portions (120) at an angle between the front surfaces.

In order to increase the detent load in the hinge structure according to one embodiment, the elastic force acting on the cam movement must be increased, and in relation to this, the free field of the spring (e.g., elastic body) must be expanded, the number of turns of the spring must be reduced, or , the wire diameter of the spring must be increased, but the free field expansion and the reduction in the number of turns have a small effect on increasing the load, and if the load increases beyond a certain value, the allowable stress limit for the spring may be exceeded, causing spring damage. Meanwhile, in order to increase the spring load, the inner diameter of the spring can be reduced or the outer diameter can be increased. In the case of reducing the inner diameter, the diameters of the rotation axes 231 and 232 must be reduced, resulting in a decrease in concentricity of the rotation axes 231 and 232 and damage to the parts. Warping may occur during the manufacturing process. In addition, when the outer diameter is increased, interference from surrounding spring-related components may occur, or there may be conditions requiring additional space to exclude component interference (e.g., an increase in the thickness of the hinge structure and a corresponding increase in the thickness of the electronic device 100). You can. Additionally, in the case of limited elasticity of the spring, the load may be concentrated on the cam parts, which may worsen wear. In this regard, the hinge structures 200a and 200b of the electronic device 100 according to various embodiments have a plurality of movable cam members 241a and 241b and arm portions 221 and 222 coupled thereto. The elastic bodies 242a, 242b, 242c, and 242d increase the maximum load and constant load acting on the cam operation, while reducing the increase in space (e.g., reducing the increase in thickness of the hinge structure or preventing it from increasing). and wear performance (e.g., as the cam structure and number of cams increases, the loss load decreases depending on the number, e.g., a four-cam structure provides 1/4 the loss load). According to various embodiments, the first elastic body 242a and the third elastic body 242c may have the same length, and the second elastic body 242b and the fourth elastic body 242b may have the same length. According to various embodiments, when the first elastic body 242a and the third elastic body 242c have different lengths, and the second elastic body 242b and the fourth elastic body 242b have different lengths, The sum of the lengths of the first elastic body 242a and the third elastic body 242c may be equal to the sum of the lengths of the second elastic body 242b and the fourth elastic body 242b.

Figure 5 is a diagram showing an example of a second rotation axis according to an embodiment. Prior to explanation, the second rotation axis shown in FIG. 5 may have the same shape and material as the first rotation axis. According to various embodiments, the rotation axis structure described in FIG. 5 may be applied to only one or both of the plurality of rotation axes included in the hinge structure.

Referring to FIGS. 3 and 5 , according to one embodiment, the second rotation shaft 232 includes a pillar portion 232_1 and a shaft gear 232_2 (e.g., the second shaft gear 232_2 or the main gear in FIG. 3). , may include a ring mounting groove (232_3) and a mounting portion (232_4). This second rotation axis 232 has a certain angle range (e.g., an angle range between 0 degrees and 100 degrees or 0 degrees and -100 degrees) according to the rotation of the second arm 222 about the second axis 12. can be rotated.

According to various embodiments, one end of the pillar portion 232_1 (e.g., the end in the x-axis direction, the portion where the mounting portion 232_4 is placed) is fastened to one side of the fixing bracket 213, and the other end (e.g. : The end in the -x-axis direction, the ring mounting groove (232_3) may be fastened to a fixing clip (e.g., 291_2). The pillar portion 232_1 may have a rod shape in which the x-axis direction is relatively longer than the y-axis direction. The pillar portion 232_1 may include at least a portion of a z-axis cross section (e.g., a cross section cut from the z axis to the -z axis direction) curved and the remaining portion may include a straight line. For example, the pillar portion 232_1 has at least a portion of one surface in the z-axis direction and at least a portion of one surface in the -z-axis direction having a straight cross-section (e.g., a cross-section cut from the z-axis to the -z-axis direction). , at least a portion of one surface in the y-axis direction and at least a portion of one surface in the -y-axis direction may be formed as a curve. Accordingly, at least a portion of the upper portion of the pillar portion 232_1 in the z-axis direction or the -z-axis direction may form a flat surface, and at least a portion of the side surface in the y-axis direction or the -y-axis direction may form a curved surface. The total length of the pillar portion 232_1 may vary depending on the components inserted into the second rotation shaft 232. For example, the pillar portion 232_1 includes one side of the rotation axis support member 235, one side of the stopper 236, the first fastening hole 222_4a1 of the third arm cam structure 222_4a, and the fourth arm cam structure 222_4b. The second fastening hole (222-_4b1), the second cam (241a_1b), the fourth cam (241b_1b), the second elastic body (242b), the fourth elastic body (242d), one side of the center bracket (243a), the shaft bracket ( One side of 243b), the support rings 292_1 and 292_2, and the fixing clip may be combined.

According to various embodiments, the pillar portion 232_1 may be press-fitted with the third arm cam structure 222_4a and the fourth arm cam structure 222_4b. In this regard, the pillar portion 231_1 includes a first portion 232_1a having a first thickness 5h1, a second portion 232_1b having a second thickness 5h2 thinner than the first thickness 5h1, and It may include a third portion 232_1c having a third thickness 5h3 that is thinner than the second thickness 5h2. At least a portion of the first portion 232_1a is inserted into the hole formed inside the fourth arm cam structure 222_4b, and at least a portion of the first portion 232_1a is inserted into the fourth arm cam structure 222_4b. and at least a portion of the fourth arm cam structure 222_4b may be in a press-fit state. At least a portion of the second portion 232_1b is inserted into the hole formed inside the third arm cam structure 222_4a, and at least a portion of the second portion 232_1b is inserted into the third arm cam structure 222_4a. and at least a portion of the third arm cam structure 222_4a may be in a press-fit state. An elastic member may be disposed in the third portion 232_1c having the third thickness 5h3. The above-described pillar portion 231_1 has a third portion 232_1c having a third thickness 5h3 disposed through the third arm cam structure 222_4a and the fourth arm cam structure 222_4b, and has a second thickness ( The second part 232_1b having 5h2) penetrates the fourth arm cam structure 222_4b and is press-fitted with the third arm cam structure 222_4a, and the first part 232_1a has a first thickness 5h1. ) may be fastened to at least a portion of the fourth arm cam structure 222_4b in a press-fitted state. According to various embodiments, the thickness between the shaft gear 232_2 and the first part 232_1a may be the same as the first thickness 5h1 of the first part 232_1a or may be thicker than the first thickness 5h1. .

According to various embodiments, the axis gear 232_2 may be disposed to be biased toward the end of the pillar portion 232_1 in the x-axis direction. The shaft gear 232_2 may have a cross-section larger than the z-axis cross-section (eg, a cross-section cut from the z-axis to the -z-axis direction) of the pillar portion 232_1, and the gear may be formed on the outer peripheral surface. For example, the shaft gear 232_2 may be arranged to engage with an idle gear (eg, 234). The shaft gear 232_2 may be disposed between the end of the pillar portion 232_1 in the x-axis direction and the plate mounting groove 232_4.

According to various embodiments, the mounting portion 232_4 may be formed at least in part at one end (eg, an end facing the x-axis direction) of the pillar portion 232_1. The mounting portion 232_4 may be mounted on one side of the fixing bracket 213. The mounting portion 232_4 can prevent the second rotation shaft 232 from rotating left and right or moving up and down. A certain groove (for example, a ring-shaped groove) may be provided between the mounting portion 232_4 and the shaft gear 232-2, and at least a portion of the rotation shaft support member may be inserted into the groove.

According to various embodiments, the ring mounting groove 232_3 may be disposed to be biased in the -x-axis direction of the pillar portion 232_1. For example, the ring mounting groove 232_3 is formed at a predetermined distance in the x-axis direction from the -x-axis direction end of the pillar portion 232_1 and has a low height on the periphery, and is formed along the circumference of the pillar portion 232_1. It can be formed as a whole. Accordingly, the ring mounting groove 232_3 may be provided in the shape of an engraved band of the pillar portion 232_1. For example, the fixing clip (eg, 292_2) may be inserted into the ring mounting groove (232_3).

Meanwhile, in the above description, the second rotation shaft 232 has been described, but the first rotation shaft 231 may also have the same configuration and material as the second rotation shaft 232. For example, the first rotation axis 231 includes a pillar part, an axis gear, a ring mounting groove, and a plate mounting groove, and is positioned at a second axis 11 spaced apart from the second axis 12 by a predetermined distance. It can rotate in a direction opposite to the rotation axis 232. According to various embodiments, the pillar portion of the first rotation shaft 231 is fastened to the second arm cam structure 221_4b in the same manner as the column portion 231_1 of the second rotation shaft 232 so that at least a portion is in a press-fit state. A first part, a second part at least partially coupled to the first arm cam structure 221_4a in a press-fit state, and a second part disposed through the first arm cam structure 221_4a and the second arm cam structure 221_4b. It may contain 3 parts.

In addition, in FIG. 5, as each structure is given a name based on the second rotation axis 232 and the second arm portion 222, a first fastening hole 222_4a1 is formed in the third arm cam structure 222_4a. , it has been described that the second fastening hole 222_4b1 is formed in the fourth arm cam structure 222_4b, but the present invention is not limited to this name. For example, based on the first rotation axis 231 and the first arm 221, a first arm cam structure 221_4a and a second arm cam structure 221_4b are disposed on the first arm 221, and the first arm cam structure 221_4a is disposed on the first arm 221. The hole formed in the arm cam structure 221_4a may be a first fastening hole, and the hole formed in the second arm cam structure 221_4b may be a second fastening hole. In this case, the hole formed in the third arm cam structure 222_4a of the second arm 222 may be a third fastening hole, and the hole formed in the fourth arm cam structure 222_4b may be a fourth fastening hole. You can.

According to various embodiments, when the hole formed in the third arm cam structure 222_4a is called a first fastening hole and the hole formed in the fourth arm cam structure 222_4b is called a second fastening hole, the first arm cam structure is called a second fastening hole. The hole formed in 221_4a may be called a third fastening hole, and the hole formed in the second arm cam structure 221_4b may be called a fourth fastening hole. A third press-fit protrusion is disposed on the inner surface of the third fastening hole formed in the first arm cam structure 221_4a, and the second fastening protrusion is identical or similar to the first fastening hole formed in the third arm cam structure 222_4a. A fourth press-fit protrusion may be disposed on the inner surface of the fourth fastening hole formed in the arm cam structure 221_4b, the same as or similar to the second fastening hole formed in the fourth arm cam structure 222_4b. When inserting from one edge of the first rotation shaft (e.g., the edge in the direction away from the axis gear) into the third fastening hole through the fourth fastening hole, the thickness of one edge of the first rotation shaft is the same as the other edge (e.g., the axis It may be formed thinner than the thickness of the edge disposed adjacent to the gear. While the first rotation shaft is fastened to the first arm, the protrusion height from the bottom surface of the third press-fit protrusion may be formed to be greater than the protrusion height from the bottom surface of the fourth press-fit protrusion so that the first rotation shaft can be press-fitted at a plurality of positions. there is. Alternatively, the protruding height from the bottom surface of the fourth press-fitting protrusion may be formed to be smaller than the protruding height from the bottom surface of the third press-fitting protrusion. According to various embodiments, the z-axis cross-sectional area (or the size of the empty space) of the third fastening hole may be smaller than the z-axis cross-sectional area (or the size of the empty space) of the fourth fastening hole.

FIG. 6 is a view showing an example of an arm portion according to an embodiment, and FIG. 7 is a view showing an example of a cross section along the A-A′ cutting line on one side of the arm portion according to an embodiment.

Prior to explanation, the dark portion shown in FIGS. 6 and 7 is a diagram showing the second dark portion based on FIG. 3. The second arm portion 222 has a similar shape (e.g., a symmetrical shape with respect to the x-axis) and may be formed of the same size and material as the first arm portion 221. The following description will be based on the second dark portion among the first and second dark portions of FIG. 3.

Referring to FIGS. 3, 6, and 7, the second arm portion 222 according to one embodiment is connected to the second rotating portion 212 through the second fastening portion (e.g., the second fastening portion 252 of FIG. 3). It is fastened with and can rotate in conjunction with the second rotating part 212 when performing the hinge operation. According to one embodiment, the second arm portion 222 may include a basic body 222_1, a connection portion 222_2, a third arm cam structure 222_4a, and a fourth arm cam structure 222_4b.

According to various embodiments, the basic body 222_1 may have at least a portion of its upper surface (eg, a surface disposed toward the z-axis) flat. A connection portion 222_2 may be disposed on at least a portion of the lower surface (eg, surface in the -z-axis direction) of the upper edge (eg, end in the y-axis direction) of the basic body 222_1. The connection portion 222_2 may be formed in a ring shape or a pipe shape with a certain thickness. For example, the connection part 222_2 may include a hole 222_21 open in a third direction (eg, x-axis direction) (or -x-axis direction). At least a portion of the second fastening part 252 may be disposed in the hole 222_21 of the connecting part 222_2. In this regard, the size of the hole 222_21 of the connection part 222_2 may have a size similar to the diameter of the second fastening part 252. A third arm cam structure 222_4a and a fourth arm cam structure 222_4b are formed on the lower surface (e.g., the surface in the -z axis direction) of the lower edge (e.g., the end in the -y axis direction) of the basic body 222_1. can be placed. The third arm cam structure 222_4a and the fourth arm cam structure 222_4b are disposed at the edges of the basic body 222_1 in the -y axis direction, and the connecting portion 222_2 is located at the y axis of the basic body 222_1. It can be placed on the axial edge.

According to various embodiments, the third arm cam structure (222_4a) includes a first fastening hole (222_4a1) of a uniform diameter facing from the x-axis to the -x-axis direction, and a first mounting portion supporting the center bar (243c) 222_4a2), a step 222_4a3 at least partially engaged with the center bracket 243a, and a first cam protrusion 222_4a4 for cam operation.

According to various embodiments, at least a portion of the second rotation shaft 232 may be inserted into the first fastening hole 222_4a1. The first fastening hole 222_4a1 may be formed in a shape identical to or similar to a cross section of one side of the second rotation axis 232 (eg, a cross section cut from the z axis to the -z axis direction). For example, at least a portion of the cross section of the first fastening hole 222_4a1 (e.g., when the third arm cam structure 222_4a is cut from the z axis to the -z axis direction, the cross section of the first fastening hole 222_4a1) is a straight line. It can be included. The first fastening hole 222_4a1 may be disposed on the same axis (eg, second axis 12) as the second fastening hole 222_4b1 of the fourth arm cam structure 222_4b. According to various embodiments, at least one first press-fit protrusion 222_4a5 may be disposed on the inner wall of the first fastening hole 222_4a1. For example, the first press-fitting protrusion 222_4a5 is located in at least a portion of the inner wall of the first fastening hole 222_4a1 in the direction toward the center of the first fastening hole 222_4a1 (or in a direction perpendicular to the inner wall of the second fastening hole 222_4b1). 1 may protrude in a direction (direction protruding from the bottom surface of the inner wall of the fastening hole 222_4a1). For example, the first press-fit protrusion 222_4a5 is formed in a long shape (e.g., the length in the x-axis direction is longer than the other directions) in the longitudinal direction (e.g., x-axis or -x-axis direction) of the first fastening hole 222_4a1. form). The y-axis cross-section of the first press-fitting protrusion 222_4a5 may be, for example, semi-elliptical or semi-circular. After the first press-fit protrusion 222_4a5 is inserted into the second rotary shaft 232, its shape may be changed as it is pressed into contact with a specific part of the second rotary shaft 232. According to one embodiment, the first press-fit protrusion 222_4a5 has a flat area (or an area with a straight z-axis cross-section) and a curved area (or an area with a curved z-axis cross-section) among the inner walls of the first fastening hole 222_4a1. It can be placed at a meeting point. The first press-fitting protrusion 222_4a5 is formed in a semi-cylindrical shape with a first length connected from the starting point to the ending point of the first fastening hole 222_4a1, or at a certain point inside the first fastening hole 222_4a1. It may be formed in a semi-cylindrical shape with a second length (eg, shorter than the first length) connected to an end point. According to various embodiments, the first press-fit protrusion 222_4a5 is a second length of half connected from the center portion of the first fastening hole 222_4a1 based on the X-axis or -x-axis direction to an end point in the -x-axis direction. Formed in a cylindrical shape, a plurality of them may be formed inside the first fastening hole 222_4a1 and arranged to be spaced apart from each other.

According to various embodiments, the first mounting portion 222_4a2 may protrude a certain length in the -y-axis direction from one side of the peripheral portion forming the first fastening hole 222_4a1. At least a portion of the z-axis cross section of the first mounting portion 222_4a2 may include a triangle. According to various embodiments, the size of the z-axis cross-section of the first mounting portion 222_4a2 may have a shape that gradually decreases from the y-axis to the -y-axis. The upper surface (e.g., the surface facing the z-axis direction) of the first mounting portion 222_4a2 may be located lower relative to the z-axis than the upper surface of the basic body 222_1 (e.g., the surface facing the z-axis direction). . According to one embodiment, the first mounting portion 222_4a2 has an upper side (e.g., a point in the z-axis direction) and a lower side (e.g., a point in the -z-axis direction) of the peripheral portion forming the first fastening hole 222_4a1. points) and may be formed to protrude in the -y-axis direction from a side of the peripheral portion of the first fastening hole 222_4a1 (eg, a point in the -y-axis direction). The first mounting portion 222_4a2 may be integrated with the peripheral portion forming the first fastening hole 222_4a1. In this regard, the first mounting portion 222_4a2 may be formed of the same material as the peripheral portion of the first fastening hole 222_4a1 or the basic body 222_1.

According to various embodiments, the step 222_4a3 is provided to facilitate assembly with the center bracket 243a, and can guide the center bracket 243a so that it does not come off until the rotation shaft is assembled. The step 222_4a3 may be formed to protrude by a predetermined height in the x-axis direction from the side of the peripheral portion of the first fastening hole 222_4a1 facing the x-axis direction. The step 222_4a3 may be arranged to surround the first fastening hole 222_4a1. In this regard, at least one of the outer peripheral surface or the inner peripheral surface of the step 222_4a3 may be circular or oval. According to various embodiments, the inner peripheral surface of the step 222_4a3 may have a shape corresponding to the shape of the first fastening hole 222_4a1 (eg, at least a portion of the z-axis cross section includes a straight line). At least a portion of the step 222_4a3 may be disposed in a ring-shaped ring provided on the center bracket 243a.

According to various embodiments, the first cam protrusion 222_4a4 protrudes by a certain height in the -x-axis direction from the side facing the -x-axis direction among the peripheral portions of the first fastening hole 222_4a1, and the protruding height varies depending on location. It can be formed differently. For example, the z-axis cross-section (e.g., a cross-section cut from the z-axis to the -z-axis direction) of the first cam protrusion 222_4a4 is circular or has a shape in which at least a portion includes a straight line and the remaining portion includes a curve (at least Some may have a D-cut shape). The first cam protrusion 222_4a4 may have a concave-convex shape in the -x-axis direction. -At least a portion of the first cam protrusion 222_4a4, which has a concavo-convex shape in the x-axis direction, may include a curved section. The height of the uneven mountains may be the same in the -x-axis direction, and the depth of the uneven valleys may be the same in the x-axis direction. The center of the uneven peaks and valleys may include a flat area of a certain length.

According to various embodiments, the fourth arm cam structure (242_4b) includes a second fastening hole (222_4b1) of a uniform diameter facing from the x-axis to the -x-axis direction, and a second mounting portion supporting the center bar (243c) 222_4b2), a protrusion 222_4b3 at least partially engaged with the stopper 236, and a second cam protrusion 222_4b4 for cam operation. This fourth arm cam structure 222_4b may be disposed on one side of the basic body 222_1 and may be disposed at a predetermined distance from the third arm cam structure 222_4a. The separation distance between the third arm cam structure (222_4a) and the fourth arm cam structure (222_4b) is determined by the elastic bodies, cam members, and centers disposed between the third arm cam structure (222_4a) and the fourth arm cam structure (222_4b). The size or shape of at least one of the brackets 243a may vary.

According to various embodiments, at least a portion of the second rotation shaft 232 may be inserted into the second fastening hole 222_4b1. The second fastening hole 222_4b1 may be formed in a shape identical to or similar to a cross section of one side of the second rotation axis 232 (eg, a cross section cut from the z axis to the -z axis direction). Accordingly, at least a partial cross section (eg, a cross section cut from the z-axis to the -z-axis direction) of the second fastening hole 222_4b1 may have the same shape as the first fastening hole 222_4a1. The second fastening hole 222_4b1 may be disposed on the same axis (eg, second axis 12) as the first fastening hole 222_4a1 of the fourth arm cam structure 242_4b. According to various embodiments, at least one second press-fit protrusion 222_4b5 is disposed on the inner wall of the second fastening hole 222_4b1, similar to the first press-fit protrusion 222_4a5 formed on the inner wall of the first fastening hole 222_4a1. It can be. For example, the second press-fitting protrusion 222_4b5 is located in at least a portion of the inner wall of the second fastening hole 222_4b1 in the center direction of the second fastening hole 222_4a1 (or in a direction perpendicular to the inner wall of the second fastening hole 222_4b1). 1 may protrude in a direction (direction protruding from the bottom surface of the inner wall of the fastening hole 222_4a1). Similar to the second press-fit protrusion 222_4b5, the first press-fit protrusion 222_4a5 has a long shape (e.g., x-axis) in the longitudinal direction (e.g., x-axis or -x-axis direction) of the second fastening hole 222_4b1. It can be provided in a form where the length in one direction is longer than the other direction. For example, the y-axis cross-section of the second press-fitting protrusion 222_4b5 may be formed in a semi-elliptical or semi-circular shape, and may be formed in a semi-cylindrical shape with a certain length in the x-axis direction. After insertion into the second rotation shaft 232, the second press-fit protrusion 222_4b5 may be deformed in shape as it is pressed into contact with a specific portion of the second rotation shaft 232. According to one embodiment, the second press-fit protrusion 222_4b5 has a flat area (or an area with a straight z-axis cross-section) and a curved area (or an area with a curved z-axis cross-section) among the inner walls of the second fastening hole 222_4b1. It can be placed at a meeting point. The second press-fitting protrusion 222_4b5 is formed in a semi-cylindrical shape with a third length connected from the start point to the end point of the second fastening hole 222_4b1, or has a second length based on the X-axis or -x-axis direction. It is formed in a semi-cylindrical shape with a second length (e.g., shorter than the first length) connected from the center of the fastening hole 222_4b1 to an end point in the x-axis direction, and a plurality of pieces are formed inside the second fastening hole 222_4b1. and can be arranged to be spaced apart from each other. The length of the second press-fit protrusion 222_4b5 and the length of the first press-fit protrusion 222_4a5 may be the same or different. Meanwhile, in the above description, it has been illustrated that the first press-fit protrusion 222_4a5 and the second press-fit protrusion 222_4b5 are formed in a semi-cylindrical shape with a relatively longer length in the x-axis direction, but the present invention is not limited thereto. For example, at least one of the first press-fit protrusion 222_4a5 and the second press-fit protrusion 222_4b5 protrudes from the bottom surface of the inner wall of the first fastening hole 222_4a1 and the second fastening hole 222_4b1, and has at least a partial shape of a sphere. Alternatively, it may be formed in at least a partial shape of a polyhedron, or in an uneven shape. Alternatively, at least one of the first press-fit protrusion 222_4a5 and the second press-fit protrusion 222_4b5 may include a plurality of protrusions that protrude from the bottom surface of the hole in a certain pattern (eg, zigzag pattern). According to various embodiments, the first press-fit protrusion 222_4a5 is formed at a position spaced apart from the cam protrusion of the third arm cam structure 222_4a, and the second press-fit protrusion 222_4b5 is formed in a fourth arm cam structure 222_4b. ) is shown as being formed close to the cam protrusion, but the present invention is not limited thereto. For example, the first press-fit protrusion 222_4a5 is formed close to the cam protrusion of the third arm cam structure 222_4a, and the second press-fit protrusion 222_4b5 is spaced apart from the cam protrusion of the fourth arm cam structure 222_4b. It may be formed in a location.

According to various embodiments, the second mounting portion 222_4b2 may be provided in the same or similar form as the first mounting portion 222_4a2. For example, the second mounting portion 222_4b2 is formed between the upper side (e.g., a point in the z-axis direction) and the lower side (e.g., a point in the -z-axis direction) of the periphery of the second fastening hole 222_4b1. , It can be arranged to protrude in the -y-axis direction. According to one embodiment, similar to the first mounting portion 222_4a2, the second mounting portion 222_4b2 may have a shape in which the size of the protruding width gradually decreases from the z-axis to the -z-axis direction.

According to various embodiments, the protrusion 222_4b3 may have a certain thickness on one side of the peripheral portion of the second fastening hole 222_4b1 facing the -x-axis direction and may protrude a certain length in the -x-axis direction. According to one embodiment, the protrusion height of the protrusion 222_4b3 may have a height corresponding to the shape of one side of the stopper 236. The thickness of the protrusion 222_4b3 may be the same as the width of the peripheral portion of the second fastening hole 222_4b1 and may have an area smaller than the entire peripheral portion. The protrusion 222_4b3 may define a limit angle at which the second arm 222 rotates within a specified angle range (eg, within a range of 0 degrees to 100 degrees or 0 degrees to -100 degrees).

According to various embodiments, the second cam protrusion 222_4b4 may have the same or similar shape as the first cam protrusion 222_4a4. According to one embodiment, the second cam protrusion 222_4b4 may include irregularities protruding in the x-axis direction on one surface of the peripheral portion of the second fastening hole 222_4b1 that faces the x-axis direction. The second cam protrusion 222_4b4 may include at least one peak and valley. The center of the peak or valley of the second cam protrusion 222_4b4 may be formed to be flat. The size (e.g., the size of the flat area) of the central area of the peak or valley of the second cam protrusion 222_4b4 may be formed to be the same as the size of the central area of the peak or valley of the first cam protrusion 222_4a4. . According to various embodiments, in order to provide a smoother hinge force (or detent feeling), the size of a certain area (e.g., the size of a flat area) at the center of the peak or valley of the second cam protrusion 222_4b4 is equal to the size of the first cam protrusion 222_4b4. The size of the central region of the peak or valley of the cam protrusion 222_4a4 may be different.

According to various embodiments, the directions of the protrusions (or irregularities or peaks and valleys) of the third arm cam structure 222_4a and the fourth arm cam structure 222_4b may be in different directions (eg, -x-axis direction). Alternatively, the directions of the protrusions of the third arm cam structure 222_4a and the fourth arm cam structure 222_4b may be different from each other. For example, the protrusion direction of the third arm cam structure 222_4a may be in the -x-axis direction, and the protrusion direction of the fourth arm cam structure 222_4b may be in the x-axis direction. Depending on the arrangement direction of the arm cam structures 222_4a and 222_4b, the direction of the cams (eg, 241a_1b and 241b_1b) may also be arranged to engage with the cam structures 222_4a and 222_4b.

According to various embodiments, the second arm portion 222 of the above-described structure may rotate based on the second rotation axis 232. One side (e.g., second cam 241a_1b) of the first cam member 241a engages with the third arm cam structure 222_4a, and one side (e.g., fourth cam 241b_1b) of the second cam member 241b is engaged with the third arm cam structure 222_4a. ) is arranged to engage with the fourth arm cam structure (222_4b), the second elastic body (242b) provides elastic force to the second cam (241a_1b) and the third arm cam structure (222_4a), and the fourth elastic body ( 242d) may provide elastic force to the fourth cam 241b_1b and the fourth arm cam structure 222_4b. The third arm cam structure 222_4a and the fourth arm cam structure 222_4b may perform cam operations simultaneously or in multiple stages. According to one embodiment, the electronic device 100 divides the cam structure required for cam operation into a third arm cam structure 222_4a and a fourth arm cam structure 222_4b, thereby increasing the size of the elastic bodies (e.g., the elastic body). Since there is no increase in diameter) or thickness (e.g., width of the line forming the elastic body), high elastic force can be provided without increasing the thickness of the electronic device 100. Additionally, the electronic device 100 can provide robustness and improved (or greater) hinge force (or detent feeling or pressure) through high elastic force, so that tension or stiffness or reaction force is increased (e.g., thickness is increased). Even when an increased display is used, the folded or unfolded state of the electronic device 100 can be stably provided. The electronic device 100 can provide various mounting angles more stably by using an arm portion including a plurality of cam structures.

Meanwhile, the second arm portion 222 including the third arm cam structure 222_4a and the fourth arm cam structure 222_4b described above is connected to the first cam with respect to the first axis 11 or the second axis 12. It may have the same or similar configuration and shape as the first arm portion 221 including the structure 221_4a and the second cam structure 221_4b. For example, a third press-fit protrusion and a fourth press-fit protrusion are disposed in the first arm cam structure 221_4a and the second arm cam structure 221_4b, respectively, including the first arm 221, and the third press-fit protrusion The protrusion and the fourth press-fit protrusion may be in contact with the first rotary shaft 231 during the process of inserting the first rotary shaft 231, thereby press-fitting and fixing the first rotary shaft 231. The first arm 221 and the second arm 222 of the above-described structure are press-fitted into the first and second rotation shafts 231 and 232 in the respective arm cam structures 221_4a, 221_4b, 222_4a, and 222_4b. Accordingly, the flow space between the side wall (or bottom surface) on which the inner hole of at least one of the arm cam structures (221_4a, 221_4b, 222_4a, 222_4b) is formed and the rotation axes (231, 232) is removed, so that the folder During the folding or unfolding operation of the electronic device 100, collision between the rotation axes 231 and 232 and the side walls of the inner holes of the arm cam structures 221_4a, 221_4b, 222_4a, and 222_4b can be prevented. The arm cam structures 221_4a, 221_4b, 222_4a, and 222_4b including the above-described press-fit protrusions can suppress the generation of abnormal noise during the folding or unfolding operation of the foldable electronic device 100.

FIG. 8 is a diagram illustrating an example of a cross section of cam structures in a coupled state to the second arm portion and the second rotation shaft according to an embodiment.

Referring to FIG. 8 , the hinge structure applied to the foldable electronic device may include at least a second arm 222 and a second rotation axis 232, for example, as shown. The second rotation shaft 232 may be coupled to the third arm cam structure 222_4a and the fourth arm cam structure 222_4b. When the second rotation shaft 232 is inserted into the first fastening hole 222_4a1 and the second fastening hole 222_4b1 of the third arm cam structure 222_4a, at least one first press-fit protrusion 222_4a5 and the second press-fit protrusion The protrusions 222_4b5 may be press-fitted with the second rotation shaft 232. According to one embodiment, the first press-fit protrusions 222_4a5 of the second rotation shaft 232 may be press-fitted with one side of the second portion 232_1b of the second rotation shaft 232. In the second part 232_1b of the second rotation axis 232, the closest distance from the center point of the axis to the curved surface is the first distance 8r1, the closest distance from the center point of the axis to the flat surface is the second distance 8r2, and the closest distance from the center point of the axis to the curved surface is the second distance 8r2. The distance from the center point to the outer surface of the third arm cam structure 222_4a may be a third distance 8r3, where the first distance 8r1 is greater than the second distance 8r2, and the third distance 8r3 is It may be greater than the first distance (8r1).

According to one embodiment, the second press-fit protrusions 222_4b5 of the second rotation shaft 232 may be press-fitted with one side of the first portion 232_1a of the second rotation shaft 232. In the first part 232_1a of the second rotation axis 232, the closest distance from the center point of the axis to the curved surface is the fourth distance 8r4, the closest distance from the center point of the axis to the flat surface is the fifth distance 8r5, and the closest distance from the center point of the axis to the curved surface is the fifth distance 8r5. The distance from the center point to the outer surface of the fourth arm cam structure 222_4b may be the sixth distance 8r6. The fourth distance 8r4 may be greater than the fifth distance 8r5, and the sixth distance 8r6 may be greater than the fourth distance 8r4. According to various embodiments, the fourth distance 8r4 is greater than the first distance 8r1, the fifth distance 8r5 is greater than the second distance 8r2, and the sixth distance 8r6 is a third distance (8r6). It can be formed larger than 8r3). Correspondingly, the size of the z-axis cross-section of the first fastening hole 222_4a1 may be smaller than the size of the z-axis cross-section of the second fastening hole 222_4b1.

In the drawing, the first press-fit protrusion 222_4a5 and the second press-fit protrusion 222_4b5 are shown as being in contact with a flat surface of the second rotation shaft 232, but the present invention is not limited thereto. For example, at least some of the first press-fit protrusions 222_4a5 are formed between the curved surface of the second rotation shaft 232 and the inner curved surface of the first fastening hole 222_4a1, and at least some of the second press-fit protrusions 222_4b5 are 2 It may be formed between the curved surface of the rotation axis 232 and the inner curved surface of the second fastening hole 222_4b1.

According to various embodiments, the above-described coupled state of the second arm portion and the second rotating shaft may have the same coupled state as the coupled state of the first arm portion and the first rotating shaft. For example, when the first rotation axis 231 is inserted into the first arm cam structure 221_4a and the second arm cam structure 221_4b formed in the first arm portion 221, the first rotation axis 231 is connected to the second rotation axis ( Similar to 232), it may include a first part, a second part, and a third part of different thicknesses, and the third press-fit protrusion formed in the first arm cam structure 221_4a is the first part of the first rotation shaft 231. The fourth press-fit protrusion disposed to contact the second portion and formed in the second arm cam structure 221_4b may be disposed to contact the first portion of the first rotation shaft 231. The third press-fit protrusion and the fourth press-fit protrusion may have the same structure and size as the first press-fit protrusion 222_4a5 and the second press-fit protrusion 222_4b5 described in FIG. 8 .

FIG. 9 is a diagram illustrating an example of a process of coupling the second arm and the second rotation shaft according to an embodiment.

Referring to FIG. 9 , at least a portion of the foldable electronic device may include a second rotation axis 232 and a second arm 222. As previously described with reference to FIG. 5, the second rotation axis 232 may have a structure in which flat surfaces are disposed to face each other in the z-axis direction and a curved surface is disposed between two flat surfaces. The second rotation axis 232 may have different thicknesses depending on location. For example, the thickness of the second rotation shaft 232 may increase gradually or stepwise as it moves from one end toward the second shaft gear 232_2.

Referring to state 901, at the time when the second rotation shaft 232 and the second arm portion 222 are aligned to be fastened, the ring mounting groove of the second rotation shaft 232 is connected to the fourth arm cam structure of the second arm portion 222. It can be placed close to (222_4b). Accordingly, the third part 232_1c of the pillar part of the second rotation axis 232 is disposed close to the fourth arm cam structure 222_4b, and the first part 232_1a of the pillar part of the second rotation axis 232 is disposed close to the fourth arm cam structure 222_4b. It may be disposed far from the fourth arm cam structure (222_4b). Here, the third portion 232_1c of the second rotation shaft 232 is inserted into the fourth arm cam structure 222_4b (e.g., inserted into the second fastening hole 222_4b1 formed in the fourth arm cam structure 222_4b). ) can be.

Referring to state 902, while the second rotation shaft 232 and the second arm portion 222 are fastened, the third portion 232_1c of the second rotation shaft 232 is inserted into the fourth arm cam structure 222_4b in advance. (e.g. inserted into the second fastening hole 222_4b1 formed in the fourth arm cam structure 222_4b), and the third part 232_1c is attached to the third arm cam structure 222_4a and the fourth arm cam structure 222_4b. While being placed, a portion of the second portion 232_1b of the second rotation axis 232 (e.g., -x-axis edge of the second portion 232_1b) is connected to the second fastening hole 222_4b1 of the fourth arm cam structure 222_4b. It may be located on the medial side. According to one embodiment, the size of the z-axis cross-section of the second rotation axis 232 may be smaller than the size of the z-axis cross-section of the second fastening hole 222_4b1. Or, a virtual z-axis cross section connecting one end of the second press-fit protrusion 222_4b5 located in the second fastening hole 222_4b1 (e.g., the top end of the press-fit protrusion protruding from the bottom surface of the second fastening hole 222_4b1). The size may be larger than the size of the z-axis cross-section of the second portion 232_1b of the second rotation axis 232 or may be similar enough to prevent indentation. Accordingly, even if the second press-fit protrusion 222_4b5 is disposed in the second fastening hole 222_4b1, the second press-fit protrusion 222_4b5 can maintain its original state without deformation. At least a portion between the second press-fit protrusion 222_4b5 and the second rotation shaft 232 (e.g., at least a portion of the protruding top or protruding end of the second press-fit protrusion 222_4b5 and the flat surface and curved surface of the second rotation shaft 232). A gap may form between the

Referring to state 902, while the second rotation shaft 232 and the second arm portion 222 are fastened, the third portion 232_1c of the second rotation shaft 232 is inserted into the fourth arm cam structure 222_4b in advance. (e.g. inserted into the second fastening hole 222_4b1 formed in the fourth arm cam structure 222_4b), and the third part 232_1c is attached to the third arm cam structure 222_4a and the fourth arm cam structure 222_4b. While being placed, a portion of the second portion 232_1b of the second rotation axis 232 (e.g., -x-axis edge of the second portion 232_1b) is connected to the second fastening hole 222_4b1 of the fourth arm cam structure 222_4b. It may be located on the medial side. According to one embodiment, the size of the z-axis cross-section of the second rotation axis 232 may be smaller than the size of the z-axis cross-section of the second fastening hole 222_4b1. Or, a virtual z-axis cross section connecting one end of the second press-fit protrusion 222_4b5 located in the second fastening hole 222_4b1 (e.g., the top end of the press-fit protrusion protruding from the bottom surface of the second fastening hole 222_4b1). The size may be larger than the size of the z-axis cross-section of the second portion 232_1b of the second rotation axis 232 or may be similar enough to prevent indentation. Accordingly, even if the second press-fit protrusion 222_4b5 is disposed in the second fastening hole 222_4b1, the second press-fit protrusion 222_4b5 can maintain its original state without deformation. At least a portion between the second press-fit protrusion 222_4b5 and the second rotation shaft 232 (e.g., at least a portion of the protruding top or protruding end of the second press-fit protrusion 222_4b5 and the flat surface and curved surface of the second rotation shaft 232). A gap may form between the

Referring to state 903, a portion of the second rotation axis 232 (e.g., at least a portion of the third portion 232_1c) is disposed to pass through the fourth arm cam structure 222_4b and penetrate the third arm cam structure 222_4a. It can be. Accordingly, the third portion 232_1c may be disposed beyond the first fastening hole 222_4a1 of the third arm cam structure 222_4a. At this time, the first press-fit protrusion 222_4a5 formed inside the first fastening hole 222_4a1 may be in a press-fit state by partially contacting the second portion 232_1b of the second rotation shaft 232. Correspondingly, a portion of the first press-fit protrusion 222_4a5 may be deformed in shape upon contact with the second portion 232_1b. Meanwhile, while the first press-fit protrusion 222_4a5 is partially in contact with the second portion 232_1b of the second rotation shaft 232 and is in a press-fit state, the second press-fit protrusion 222_4b5 is formed inside the second fastening hole 222_4b1. ) may also be partially in contact with the first part 232_1a of the second rotation shaft 232 and in a press-fit state. Correspondingly, a portion of the second press-fit protrusion 222_4b5 may be deformed in shape upon contact with the first portion 232_1a.

In state 903, when the second rotation shaft 232 is further inserted in the -x-axis direction, as in state 904, the -x-axis edge portion of the second part 232_1b of the second rotation shaft 232 is connected to the first fastening hole. (222_4a1) is in a press-fit state with the entire first press-fit protrusion 222_4a5 inside, and the entire or at least part of the first portion 232_1a of the second rotation shaft 232 is the second press-fit protrusion inside the second fastening hole 222_4b1. (222_4b5) It can be arranged to have a press-fit state with the whole. The x-axis edge portion of the second portion 232_1b of the second rotation axis 232 is disposed in the second fastening hole 222_4b1, but is formed to be smaller than the size of the second fastening hole 222_4b1, thereby allowing the second fastening hole 222_4b1 It may be in a non-contact or non-press-fit state with the second press-fit protrusion 222_4b5 in the hole 222_4b1.

As described above, the second rotation shaft 232 and the second arm portion 222 according to one embodiment are such that the second portion 232_1b of the second rotation shaft 232 is in a press-fit state with the first press-fit protrusion 222_4a5. It may have a structure in which the starting point and the starting point where the first portion is pressed into the second press-fitting protrusion 222_4b5 are formed to be the same. When applying this structure, the first part 232_1a and the second part 232_1b of the second rotation axis 232 are connected to the third arm cam structure 222_4a and the fourth arm cam structure (222_4a) of the second arm part 222. As it is simultaneously press-fitted into 222_4b), the pressure applied in the -x-axis direction may increase. The increased pressure is applied to at least a portion of the connection point between the third arm cam structure 222_4a and the basic body 222_1 of the second arm 222 and the basic body of the fourth arm cam structure 222_4b and the second arm 222. (222_1) While acting on at least a portion of the connection point, the shape of the second arm portion 222 may be deformed or cracks may occur. In this regard, as shown in FIG. 10, the shape of the second rotation shaft 232 may be configured differently so that the press-fitting point is different.

Figure 10 is a diagram showing an example of a process for combining a second arm and a second rotation shaft according to another embodiment.

Referring to FIG. 10, referring to state 1001, before fastening the second rotation shaft 232 and the second arm portion 222, the middle ring mounting groove of the second rotation shaft 232 is the second arm portion 222. It can be placed close to the four-arm cam structure (222_4b).

Referring to state 1002, the second rotation axis 232 is engaged with the fourth arm cam structure 222_4b and the third arm cam structure 222_4a so that a portion of the third portion 232_1c (e.g., x-axis edge) is It may be disposed in the first fastening hole 222_4a1 of the three-arm cam structure 222_4a. The z-axis cross-sectional size of the third portion 232_1c of the second rotation shaft 232 is smaller than the size within the first fastening hole 222_4a1 (e.g., the empty space excluding the first press-fit protrusion 222_4a5), The portion 232_1c and the first press-fit protrusion 222_4a5 may be in a non-contact state, or may be in a non-press-fit state even if they are in contact. A portion of one side of the second portion 232_1b of the second rotation axis 232 (e.g., a portion of the -x-axis edge of the second portion 232_1b) may be placed in a state where it is not inserted into the third arm cam structure 222_4a. . In this regard, the x-axis length of the second portion 232_1b of the second rotation axis 232 is the length from the x-axis edge of the third arm cam structure 222_4a to the x-axis edge of the fourth arm cam structure 222_4b. It can have a length longer than that. A portion of the other side of the second part 232_1b of the second rotation axis 232 (e.g., the x-axis edge of the second part 232_1b) is the size of the second fastening hole 222_4b1 (e.g., the second press-fit protrusion 222_4b5). It can be formed to have a size smaller than (empty space excluding). Accordingly, a portion of the other side of the second portion 232_1b is in a non-contact state with the second press-fit protrusion 222_4b5 inside the second fastening hole 222_4b1, or is in a non-press-fit state with the second fastening hole 222_4b1 even if it is contacted. You can.

When the second rotation shaft 232 is further inserted in the direction from the fourth arm cam structure 222_4b to the third arm cam structure 222_4a, as in state 1003, a portion (e.g., the second portion) of the second rotation shaft 232 A portion of the -x-axis edge of (232_1b) is in contact with the first press-fit protrusion 222_4a5 formed inside the first fastening hole 222_4a1, and at least a portion of the first press-fit protrusion 222_4a5 is of the second portion 232_1b. It may be deformed depending on press fitting. According to one embodiment, the first press-fit protrusion 222_4a5 partially formed inside the first fastening hole 222_4a1 may be in a press-fit state with a portion of the second portion 232_1b. At least a portion of the first portion 232_1a of the second rotation shaft 232 may be disposed inside the second fastening hole 222_4b1 of the fourth arm cam structure 222_4b. The second press-fit protrusion 222_4b5 partially formed inside the second fastening hole 222_4b1 may be in a non-contact state with the first portion 232_1a.

In state 1003, when the second rotation shaft 232 is further inserted in the -x-axis direction, as in state 1004, the -x-axis edge portion of the second part 232_1b of the second rotation shaft 232 is connected to the first fastening hole. (222_4a1) is in a press-fit state with the entire first press-fit protrusion 222_4a5 inside, and the position of the press-fit second portion 232_1b may be different compared to the 1003 state. The entire or at least part of the first part 232_1a of the second rotation shaft 232 may be arranged to be in a press-fitted state with the entire second press-fit protrusion 222_4b5 inside the second fastening hole 222_4b1.

As described above, the second rotation shaft 232 and the second arm portion 222 according to one embodiment include the first press-fit protrusion 222_4a5 formed on the third arm cam structure 222_4a and the second rotation shaft 232. While the press-fitting state with the second portion 232_1b is in progress, the second press-fitting protrusion 222_4b5 may be in a non-pressing state. Accordingly, pressure may be applied only between the basic body 222_1 of the second arm 222 and the third arm cam structure 222_4a. Thereafter, while the press-fit state of the first press-fit protrusion 222_4a5 is maintained, the press-fit state of the second press-fit protrusion 222_4b5 progresses, and the pressure sequentially increases, thereby forming a hinge structure applied to the foldable electronic device of the present invention. By providing time for the second arm portion 222 to adapt to the pressure, damage or deformation of the second arm portion 222 can be reduced.

Meanwhile, the structure of the second rotation shaft 232 and the structure of the second arm portion 222 described in FIGS. 9 and 10 are the same or similar to the structure of the first rotation shaft 231 and the structure of the first arm portion 221. It can be applied.

FIG. 11 is a diagram illustrating a first state of some components of an electronic device according to various embodiments of the present disclosure.

1, 3, and 11, some components of the electronic device 100 include a first hinge structure 200a and a display 160, and the first hinge structure 200a and the display 160 may have a first state (e.g., unfolded state). Prior to explanation, the drawing shown in FIG. 11 may correspond to the shape of the second hinge structure 200b and the display 160 depending on the viewing angle.

According to various embodiments, the first hinge structure 200a includes a first rotating member 211, a second rotating member 212, a fixing bracket 213, a first arm 221, and a second arm 222. , the first and second rotation shafts 231 and 232, idle gears 233 and 234, a first movable cam member 241a, a second movable cam member 241b, and a first elastic body 242a, It may include a second elastic body (242b), a third elastic body (242c), a fourth elastic body (242d), a center bracket (243a), and an axis bracket (243b). The first rotating member 211 may be connected to the first arm portion 221 through the first fastening portion 251. The second rotating member 212 may be connected to the second arm portion 222 through the second fastening portion 252.

According to various embodiments, while the first rotating member 211 and the second rotating member 212 maintain the unfolded state, the display 160 may maintain the unfolded state. The first arm 221 may rotate within a specified angle range (eg, 0 degrees to 100 degrees or 0 degrees to 95 degrees) with respect to the first rotation axis 231. The second arm 222 may rotate within a specified angle range based on the second rotation axis 232. The first rotating member 211 may rotate within an angular range similar to or identical to that of the first arm 221 about the third axis 13. The second rotating member 212 may rotate within an angular range similar to or identical to that of the second arm 222 about the fourth axis 14 . The third axis 13 may be formed higher in the direction of the display 160 (eg, z-axis direction) than the first rotation axis 231. The fourth axis 14 may be formed to be higher in the direction of the display 160 (eg, z-axis direction) than the second rotation axis 232. The distance between the third axis 13 and the fourth axis 14 may be shorter than the distance between the first rotation axis 231 and the second rotation axis 232. According to various embodiments, the third axis 13 and the fourth axis 14 may be formed parallel to each other on a horizontal axis (eg, y-axis). According to one embodiment, the third axis 13 and the fourth axis 14 are formed on the same layer as the display 160, or above the display 160 (e.g., above the display 160). ) can be formed. For example, the third axis 13 and the fourth axis 14 may be virtual axes.

According to various embodiments, while the first rotating member 211 and the second rotating member 212 maintain the unfolded state, the first bracket body 211_1 and the second rotating member (211_1) of the first rotating member 211 The second bracket bodies 212_1 of 212) may be arranged side by side. According to one embodiment, based on the drawing, the upper surface of the first bracket body 211_1 and the upper surface of the second bracket body 212_1 may be arranged to face upward (e.g., z-axis direction) in the same manner. there is. According to one embodiment, while the first rotating member 211 and the second rotating member 212 maintain the unfolded state, the first arm portion 221 and the second arm portion 222 are also arranged side by side, thus , the first basic body 221_1 of the first arm 221 and the second basic body 222_1 of the second arm 222 are arranged to face the same direction (e.g., z-axis direction based on the drawing). It can be. Accordingly, the first bracket body 211_1, the second bracket body 212_1, the first basic body 221_1, and the second basic body 222_1 are all arranged in parallel with respect to the horizontal axis, based on the drawing. They can all be arranged to face the same upward direction. The first bracket body 211_1, the second bracket body 212_1, the first basic body 221_1, and the second basic body 222_1 may support the rear of the display 160 without a difference in height.

According to various embodiments, a gap may be formed between the hinge structures 200a and 200b at the center where the display 160 is bent. An adhesive layer may be disposed between a peripheral area other than the center 163 of the display 160 (eg, the first part 161 or the second part 162) and the hinge structures 200a and 200b.

According to various embodiments, in the first state (e.g., the display 160 is unfolded), the peaks and valleys of the first cam 241a_1a of the first moving cam member 241a are of the first arm cam structure 221_4a. It is arranged to engage with the valley and the mountain, respectively, and the ridge and valley of the second cam (241a_1b) of the first moving cam member 241a are arranged to engage with the valley and the mountain of the third arm cam structure (222_4a), and the second cam member 241a The ridges and valleys of the third cam (241b_1a) of the movable cam member (241b) are arranged to engage with the valleys and ridges of the second arm cam structure (221_4b), respectively, and the fourth cam (241b_1b) of the second movable cam member (241b) ) can be arranged to engage with the valleys and valleys of the fourth arm cam structure (222_4b), respectively.

FIG. 12 is a diagram illustrating a first angle state of some structures of an electronic device according to various embodiments of the present disclosure.

Referring to FIGS. 1, 3, and 12, the first hinge structure 200a (or the second hinge structure 200b) is in a first angular state (e.g., the first rotating member 211 and the second rotating member ( 212) may include a state in which the angle between the upper surface (surface in the z-axis direction) and the horizontal axis (y-axis) is 30 degrees. As described above, the first hinge structure 200a includes a first rotating member 211, a second rotating member 212, a fixing bracket 213, a first arm 221, a second arm 222, First movable cam member 241a, second movable cam member 241b, first elastic body 242a, second elastic body 242b, third elastic body 242c, fourth elastic body 242d, first rotation axis ( 231), a second rotation shaft 232, a center bracket 243a, and a shaft bracket 243b. The first rotating member 211 may be connected to the first arm portion 221 through the first fastening portion 251. The second rotating member 212 may be connected to the second arm portion 222 through the second fastening portion 252.

According to various embodiments, external pressure is applied to the first housing to which the first rotating member 211 is fixed (e.g., the first housing portion 110 of FIG. 1) or to the second housing to which the second rotating member 212 is fixed. 2 Based on the drawing showing the housing (e.g., the second housing portion 120 in FIG. 1), a certain angle (e.g., 5 It can be rotated by a certain unit angle such as degrees, 10 degrees, or 15 degrees. For example, the first rotating member 211 connected to the first housing portion 110 is rotated from a point on the horizontal axis (eg, y-axis) in the direction of the vertical axis (eg, z-axis) with respect to the third axis 13. It can be rotated by 1 angle (e.g. 30 degrees). When the first rotating member 211 rotates by the first angle due to external pressure, the pressure may be transmitted to the first arm portion 221 through the first fastening portion 251. Accordingly, the first arm 221 may rotate by a first angle from the horizontal axis (eg, y-axis) to the vertical axis (eg, z-axis) with respect to the first rotation axis 231. In this operation, the first arm cam structure 221_4a and the second arm cam structure 221_4b may rotate according to the rotational movement of the first arm 221. The first rotation shaft 231 inserted into the first arm cam structure (221_4a) and the second arm cam structure (221_4b) is the force transmitted according to the rotation of the first arm cam structure (221_4a) and the second arm cam structure (221_4b). , and as the first rotation shaft 231 rotates, the first shaft gear (eg, 231_2 in FIG. 3) of the first rotation shaft 231 may rotate. As the first shaft gear rotates, the first idle gear 233 and the second idle gear 234 gear-coupled with the first shaft gear rotate, and as a result, the second shaft gear-connected to the second idle gear 234 As the gear 232_2 rotates, the second rotation shaft 232 may rotate. As the second rotation axis 232 rotates, the third arm cam structure 222_4a and the fourth arm cam structure 242_4b rotate, and the third arm cam structure 222_4a and the fourth arm cam structure 222_4b rotate. Accordingly, the second arm 222 rotates, and as the second arm 222 rotates, the second rotating member 212 connected through the second fastening part 252 may rotate. In the above description, an operation in which the second rotating member 212 rotates simultaneously while external pressure is applied to the first rotating member 211 has been described, but the operation is not limited thereto. For example, when external pressure is applied to the second rotating member 212, the second arm 222 connected through the second fastening part 252 rotates, and the second rotating shaft 232 connected to the second arm 222 , a second idle gear 234 connected to the second rotation shaft 232, a first idle gear 233 connected to the second idle gear 234, a first rotation shaft 231 connected to the first idle gear 233, A first arm 221 having a first arm cam structure 221_4a and a second arm cam structure 221_4b connected to the first rotation axis 231, through the first arm 221 and the first fastening part 251. The connected first rotating member 211 can rotate. Alternatively, when external pressure is applied to the first rotating member 211 and the second rotating member 212 simultaneously, the first arm 221 and the second arm 222 may simultaneously rotate at a certain angle.

As described above, the first hinge structure 200a may have a structure in which the first rotating member 211 and the second rotating member 212 rotate simultaneously according to pressure (or force) applied from the outside. Accordingly, even if external pressure occurs in the second housing part 120 to which the second rotating member 212 is connected, or occurs simultaneously in the first housing part 110 and the second housing part 120, the first rotating member 212 (211) and the second rotating member 212 may rotate simultaneously. As the electronic device 100 according to an embodiment of the present invention rotates simultaneously, twisting of the first housing portion 110 and the second housing portion 120 is suppressed, and a stable hinge operation can be performed.

According to one embodiment, the axes 13 and 14 of the first rotating member 211 and the second rotating member 212 are connected to the first rotating shaft 231 of the first arm 221 and the second arm 222. By being disposed between the second rotation shafts 232, the rotation amount of the first rotation member 211 and the rotation amount of the first arm portion 221 may be different at each rotation time. Accordingly, the upper surface of the first bracket body 211_1 of the first rotating member 211 rotates more about the vertical axis (e.g., z-axis) than the upper surface of the basic body 221_1 of the first arm 221. It can have a status of As the first rotating part 211 and the first arm part 221 are connected through the first fastening part 251, while the first rotating member 211 rotates, the first fastening part 251 is connected to the first fastening part 251. It may slide a certain distance along the first slide hole 211_2 of the rotating member 211. Similarly, the upper surface of the second bracket body 212_1 may be rotated more about the vertical axis (eg, z-axis) than the second basic body 222_1. In addition, as the second rotating member 212 and the second arm portion 222 are connected through the second fastening portion 252, while the second rotating member 212 rotates, the second fastening portion 252 It may slide a certain distance along the second slide hole 212_2 of the second rotating member 212.

As described above, when the display 160 of the electronic device 100 is folded at a specific angle (e.g., the angle between the upper surface of the display 160 and the horizontal axis is 30 degrees or -30 degrees), the first arm portion ( 221) As the rotation occurs, among the inclined portions between the peaks and valleys of the first arm cam structure (221_4a), the inclined portions closer to the mountain side are among the inclined portions between the peaks and valleys of the first cam (241a_1a) of the first mobile cam member (241a). It is in contact with the inclined portion close to the mountain side, and among the inclined portions between the peak and the valley of the second arm cam structure (221_4b), the inclined portion closest to the mountain side is the peak and the valley of the third cam (241b_1a) of the second moving cam member (241b). Among the slopes between valleys, it may be in contact with a slope closer to the mountain side. Similarly, as the second arm portion 222 rotates, the inclined portion closest to the mountain side among the inclined portions between the peaks and valleys of the third arm cam structure 222_4a is connected to the second cam 241a_1b of the first moving cam member 241a. Among the slopes between the peaks and valleys, the slopes closest to the mountain side are in contact with each other, and among the slopes between the mountains and valleys of the fourth arm cam structure 222_4b, the slopes closest to the mountain side are of the second moving cam member 241b. It may be in a state of being in contact with an inclined portion closer to the mountain side among the inclined portions between the peaks and valleys of the fourth cam (241b_1b).

FIG. 13 is a diagram illustrating a second angle state of a first hinge structure according to various embodiments.

Referring to FIGS. 1, 3, and 13, the first hinge structure 200a may include a second angle state. The first hinge structure 200a includes, for example, a first rotating member 211, a second rotating member 212, a fixing bracket 213, a first arm 221, a second arm 222, and a gear structure ( 230), first movable cam member (241a), second movable cam member (241b), first elastic body (242a), second elastic body (242b), third elastic body (242c), fourth elastic body (242d), It may include a first rotation axis 231, a second rotation axis 232, a center bracket 243a, and an axis bracket 243b. The first rotating member 211 is connected to the first arm 221 through the first fastening part 251, and the second rotating member 212 is connected to the second arm part 222 through the second fastening part 252. ) can be connected to.

According to various embodiments, external pressure (or force) is applied to the first housing (e.g., the first housing portion 110 of FIG. 1) or the second housing (e.g., the second housing portion 120 of FIG. 1). Based on this drawing, it can be rotated from a point on the horizontal axis (eg, y-axis) to the vertical axis (eg, z-axis) by a second angle (eg, 60 degrees). For example, when external pressure or force is transmitted to the first housing part 110 or the second housing part 120, the first rotating member 211 or the second rotating member 212 moves on the third axis 13. Alternatively, the fourth axis 14 may be rotated from a point on the horizontal axis (e.g., y-axis) to the vertical axis (e.g., z-axis) by a second angle (e.g., 60 degrees). In the process of performing the above-described operation, the applied force is applied through the first arm 221 or the second arm 222, the first and second rotation shafts 231 and 232, and the idle gears 233 and 234. By being transferred to each other, the first rotating member 211, the second rotating member 212, the first arm 221, and the second arm 222 can rotate simultaneously.

According to various embodiments, as the first rotating member 211 and the second rotating member 212 rotate at the second angle, the first fastening part 251 and the second fastening part 252 are connected to the first slide hole. It slides within 211_2 and the second slide hole 212_2, but may be located closer to the vertical axis (eg, z-axis) than when rotated at the first angle. In the above-described operation process, the first rail 211_3 of the first rotating member 211 rotates outward to the left from the center of the fixing bracket 213, based on the drawing, and the second rotating member ( The second rail 212_3 of 212) may rotate from the center of the fixing bracket 213 to the right and outward. As the rotating axes of the first rotating member 211 and the first arm 221 are different from each other, and the rotating axes of the second rotating member 212 and the second arm 222 are different from each other, the first bracket body The distance between the upper surface of (211_1) and the upper surface of the second bracket body (212_1) is greater than the distance between the upper surface of the first basic body (221_1) and the upper surface of the second basic body (222_1) along the vertical axis (e.g. : can be placed closer to the z-axis).

As described above, when the display 160 of the electronic device 100 is folded at a specific angle (e.g., the angle between the upper surface of the display 160 and the horizontal axis is 60 degrees or -60 degrees), the first arm portion ( 221) As the rotation occurs, at least a portion of the ridge of the first arm cam structure 221_4a is in contact with at least a portion of the ridge of the first cam 241a_1a of the first movable cam member 241a, and the second arm At least a portion of the peak of the cam structure 221_4b may be in contact with the peak of the third cam 241b_1a of the second movable cam member 241b. Similarly, as the second arm 222 rotates, at least a portion of the ridge of the third arm cam structure 222_4a is in contact with the ridge of the second cam 241a_1b of the first moving cam member 241a, At least a portion of the ridge of the fourth arm cam structure 222_4b may be in contact with the ridge of the fourth cam 241b_1b of the second movable cam member 241b.

In the above description, in the first angle state, the inclined portion adjacent to the ridge of the cam structure is described as being in contact with the inclined portion adjacent to the ridge of the cam, and in the second angle state, at least a portion of the ridge of the cam structure is in contact with the cam. Although it has been described as being in contact with acid, it is not limited to this. For example, the electronic device 100 may be configured in a variety of angle states (e.g., the angle formed between the upper surface of one side of the display and the horizontal axis is free stop due to the cam structure and the friction of the cam, or various angles, for example, in units of 1 degree and in units of 5 degrees). or 15 degrees, 30 degrees, 45 degrees, 60 degrees, etc.), and for each angle state, the part where the inclined portion between the peaks and valleys of the cam structure contacts the inclined portion between the peaks and valleys of the cam may vary. Alternatively, for each angle state, the size of the area where the peak of the cam structure is in contact with the peak of the cam may vary.

FIG. 14 is a diagram illustrating a second state of some structures of an electronic device according to various embodiments of the present disclosure.

Referring to FIGS. 1, 3, and 14, the electronic device 100 may include a first hinge structure 200a and a display 160. The second state of the first hinge structure 200a may include a folded state. The first hinge structure 200a includes, for example, a fixing bracket 213, a first rotating member 211, a second rotating member 212, a first arm 221, a second arm 222, and a first fastener. Part 251, second fastening part 252, first rotation shaft 231, second rotation shaft 232, shaft gears of the first rotation shaft 231 and second rotation shaft 232, and idle gears (233, 234), first moving cam member (241a), second moving cam member (241b), first elastic body (242a), second elastic body (242b), third elastic body (242c), fourth elastic body (242d) ), a center bracket (243a), and a shaft bracket (243b).

According to one embodiment, the first rotating member 211 and the second rotating member 212 may be arranged to face each other. Based on the drawing, the edge ends (e.g., the ends in the z-axis direction based on FIG. 17) of the first housing part 110 and the second housing part 120 are arranged adjacent to each other, so in the drawing, , the first rotating member 211 is disposed parallel to the vertical axis (e.g., z-axis), or the first rotating member 211 rotates about the third axis 13 and the vertical axis (e.g., z-axis). Based on the axis), it can be arranged to be tilted further by a specified angle in the -y axis direction. According to various embodiments, the second rotating member 212 is disposed parallel to the vertical axis (e.g., z-axis), similar to the first rotating member 211, or rotates about the fourth axis 14 and rotates about the vertical axis. It can be arranged to be tilted further by a specified angle in the y-axis direction based on the z-axis (e.g., z-axis). For example, the third axis 13 may be the central axis of rotation of the first rail 211_3, and the fourth axis 14 may be the central axis of rotation of the second rail 212_3. The first arm portion 221 rotates about the first rotation axis 231 and is arranged parallel to the first rotation member 211, and the second arm portion 222 rotates about the second rotation axis 232. 2 It can be arranged in parallel with the rotating member 212. Accordingly, the center 163 of the display 160 can be bent into a “U” shape, and the remaining area can remain flat.

According to various embodiments, the first rotating member 211 and the first arm portion 221 are arranged vertically (or inclined by a specified angle in the -y-axis direction with respect to the vertical axis (e.g., z-axis)), The upper surface of the first bracket body 211_1 of the first rotating member 211 and the upper surface of the basic body 221_1 of the first arm 221 may be arranged side by side without any height difference. Due to the difference in length between the first rotating member 211 and the first arm portion 221, the first fastening portion 251 is located on the lower side of the first slide hole 211_2 of the first rotating member 211 (e.g., FIG. 17 As a reference, it can be located at the edge in the -z-axis direction. According to various embodiments, when the electronic device 100 is in an unfolded state, the first fastening part 251 may be located at the upper edge of the first slide hole 211_2 of the first rotating member 211. Similarly, when the electronic device 100 is in a folded state, the second fastening part 252 may be located at the lower edge of the second slide hole 212_2.

According to various embodiments, when the display 160 of the electronic device 100 is folded (e.g., the center of the display 160 is transformed into a U shape), as the first arm 221 rotates, the first arm 221 The peaks and valleys of the arm cam structure (221_4a) are arranged to engage with the valleys and peaks of the first cam (241a_1a) of the first moving cam member (241a), and the peaks and valleys of the second arm cam structure (221_4b) are It may be arranged to engage with the valley and peak of the third cam (241b_1a) of the second moving cam member (241b). Similarly, as the second arm 222 rotates, the peaks and valleys of the third arm cam structure 222_4a are arranged to engage with the valleys and valleys of the second cam 241a_1b of the first moving cam member 241a. , the peaks and valleys of the fourth arm cam structure (222_4b) may be arranged to engage with the valleys and valleys of the fourth cam (241b_1b) of the second moving cam member (241b).

The electronic device 100 according to the various embodiments described above can increase the detent load of the hinge by implementing a plurality of cam structures without increasing the thickness of the hinge structure. The electronic device 100 uses the increased detent load of the hinge structure to operate at room temperature or low temperature even if the reaction force (or repulsion force, or force to unfold the display in a folded state) of the display 160 (or flexible display) increases. In an environment, it is possible to improve a phenomenon in the folded or unfolded state of the terminal (e.g., a phenomenon in which the ends of the housings 110 and 120 are opened in the folded state). The electronic device 100 can allow an increase in the reaction force of the display 160 through an improved detent load, thereby increasing the rigidity of the display 160 (e.g., manufacturing the display 160 thicker than before). applicable), thereby reducing the occurrence of cracks or surface damage in the area where the load due to the folding is concentrated in the folded state (e.g., the central portion 163 of the display 160).

FIG. 15 is a diagram showing an example of a different form of a second arm according to various embodiments, FIG. 16 is a diagram showing an unfolded state of an electronic device to which a different type of arm is applied, and FIG. 17 is a diagram showing an example of a different type of arm to which a different type of arm is applied. This is a diagram showing the folded state of an electronic device.

Referring to FIG. 15, the second arm portion 222 according to one embodiment includes a basic body 222_1, a connection portion 222_2 formed on one side of the basic body 222_1 and used for connection with the second rotation member, and the basic body 222_1. It may include at least a third arm cam structure 222_4a formed on the other side of the basic body 222_1 and coupled to the second rotation axis. Meanwhile, in the drawing, the second arm 222 is shown based on the angle viewed in the x-axis direction with the second arm 222 placed on the sintering seating jig, and the third arm cam structure 222_4a ) and the fourth arm cam structure (222_4b) may be seen overlapping. According to one embodiment, the fourth arm cam structure 222_4b may have the same or similar shape as the third arm cam structure 222_4a.

According to various embodiments, the third arm cam structure 222_4a includes a modified first fastening hole 222_4a1, and a first axis 1510 crossing the vertical center line of the modified first fastening hole 222_4a1. ) (or the width of the first virtual axis) (or the length of the vertical axis of the first fastening hole) is greater than the width of the second axis 1520 (or the second virtual axis) (or the length of the horizontal axis of the first fastening hole) crossing the horizontal center line. It can be formed long. In relation to the formation of the modified first fastening hole 222_4a1, the third arm cam structure 222_4a includes a first side wall 222_4a61 at least partially including a flat area, and at least a flat area and the first side wall 222_4a61. A second side wall 222_4a62 disposed to face (222_4a61), a third side wall 222_4a63 disposed between the first side wall 222_4a61 and the second side wall 222_4a62 and formed to be convex in the z-axis direction, It may include a fourth side wall 222_4a64 that is disposed between the first side wall 222_4a61 and the second side wall 222_4a62 and is convex in the -z-axis direction. The third side wall 222_4a63 and the fourth side wall 222_4a64 may be arranged to face each other with respect to the second axis 1520.

The modified first fastening hole 222_4a1 of the above-described structure has both ends of the third side wall 222_4a63 connected to the top of the first side wall 222_4a61 (e.g., the top in the -z-axis direction) and the second side wall 222_4a62. As it is supported by the top (e.g., the top in the -z-axis direction), during the process of manufacturing the second arm portion 222, the surrounding environment (e.g., an environment in which high heat and pressure is applied, or an environment in which high heat and gravity are applied, or Deformation (e.g., sagging) of at least a portion of the third side wall 222_4a63 in the z-axis direction can be prevented by an environment in which the second arm 222, which contains high heat, is cooled at a constant temperature and pressure.

Meanwhile, the above-described modified first fastening hole (222_4a1) structure can be applied to the second fastening hole (222_4b1) to form a modified second fastening hole, and can also be applied to the fastening holes of the first arm portion 221 in the same way. You can.

Referring to FIGS. 16 and 17 , the first arm portion 221 having a modified first fastening hole 222_4a1 formed so that the relatively long first axis 1510 mentioned in FIG. 15 faces the z-axis direction, and the modified first arm portion 221 According to the application of the second arm 222 having the second fastening hole 222_4b1, the first arm 221 and the second arm 222 also have a modified first rotation axis 231 and a modified second rotation shaft 232. ) can be applied. For example, when the foldable electronic device 100 is in an unfolded state, the modified first rotation axis 231 may have a length in the z-axis direction that is longer than a length in the y-axis direction based on the center point of the axis. Similarly, the modified second rotation axis 232 may also have a length in the z-axis direction longer than a length in the y-axis direction based on the center point of the axis. According to various embodiments, when the foldable electronic device 100 is in a folded state, the length of the modified first rotation axis 231 in the y-axis direction may be formed to be longer than the length in the z-axis direction based on the center point of the axis. . Similarly, the modified second rotation axis 232 may have a length in the y-axis direction longer than a length in the z-axis direction based on the center point of the axis when the foldable electronic device 100 is in a folded state. In FIG. 17, state 1701 is a state when the foldable electronic device 100 is in a folded state, looking at the central portion of the first housing portion 110 and the central portion of the second housing portion 120 disposed adjacent to each other. It is shown. State 1703 represents a state in which the side portions of the first housing portion 110 and the side portions of the second housing portion 120 disposed adjacent to each other are viewed when the foldable electronic device 100 is in the folded state, The 1705 state shows at least a partial example of a cross section of the D-D' cutting line in the 1701 state.

According to various embodiments, even if the modified first rotation axis 231 and the modified second rotation axis 232 are applied to the first arm portion 221 and the second arm portion 222, the first arm portion 221 and the second arm portion 222 Except for the shape of the fastening hole of the arm portion 222, the surrounding shape may have the same or similar structure as the structure previously described in FIGS. 1 to 14. Accordingly, the first arm 221 and the second arm 222 may be connected through the same connection structure as the first and second rotation members 211 and 212 described above. In addition, as the same first shaft gear 231_2 and second shaft gear 232_2 are formed on the modified first rotation shaft 231 and the modified second rotation shaft 232, the first shaft gear 231_2 is 1 is connected to the idle gear 233, and the second shaft gear 232_2 may be connected to the second idle gear 234. The shaft gears 231_2 and 232_2 and the idle gears 233 and 234 are disposed inside the hinge housing 150, and when the foldable electronic device 100 is in the unfolded state, at least the hinge housing 150 Some may be obscured by the first housing portion 110 and the second housing portion 120 . Alternatively, when the foldable electronic device 100 is in a folded state, at least a portion of the hinge housing 150 may be exposed to the outside through between the first housing portion 110 and the second housing portion 120.

According to the various embodiments described above, a foldable electronic device according to one embodiment includes a display, a first housing portion 110 on which the display is mounted, a second housing portion 120, the first housing portion, and the It includes a hinge structure connecting a second housing portion, wherein the hinge structure includes a first rotation member connected to the first housing portion, a second rotation member connected to the second housing portion, and rotation of the first rotation member. A first arm rotating in response to, a second arm rotating in response to the rotation of the second rotating member, a first rotating shaft coupled to the first arm, and a second rotating shaft coupled to the second arm, The second arm unit includes an arm cam structure having a first fastening hole into which one side of the second rotation shaft is inserted, and an arm cam structure having a second fastening hole into which the other side of the second rotation shaft is inserted, wherein the first fastening When the foldable electronic device is in an unfolded state, the inner surface of at least one of the hole 222_4a1 and the second fastening hole 222_4b1 has a first side wall 222_4a61 disposed perpendicular to the display direction, in the display direction. A second side wall (222_4a62) arranged vertically and facing the first side wall, and a third side wall (222_4a63) formed to connect one end of the first side wall and one end of the second side wall and forming a curved surface. , It may include a fourth side wall 222_4a64 formed to connect the other end of the first side wall and the other end of the fourth side wall and disposed to face the third side wall.

According to various embodiments, the structures of the first to fourth side walls may be applied equally or similarly to the fastening holes of at least one arm cam structure formed in the first arm portion. As described above, when the foldable electronic device is in an unfolded state, a first side wall and a second side wall are formed in a direction perpendicular to the front surface of the display, and a third side wall is disposed between the first side wall and the second side wall. And since the fourth side wall has a convex shape, the occurrence of deformation can be reduced during the manufacturing process of the hinge structure.

According to various embodiments, the foldable electronic device includes at least one piece formed on the first side wall and the second side wall and having a certain height in the direction toward the center of the hole or in a direction protruding from the bottom surface of the first side wall and the second side wall. It may further include press-fit protrusions.

According to various embodiments, when the foldable electronic device is in an unfolded state, a flat area of the first rotation axis (or second rotation axis) is located on the front side (or It may be arranged perpendicularly to the rear) or close to vertically (e.g., with a certain range (e.g. +-10 degrees) based on 90 degrees).

According to various embodiments, when the foldable electronic device is in a folded state to correspond to the shapes of the first to fourth side walls, the flat area of the first rotation axis (or second rotation axis) is the front surface (or It may be arranged horizontally with respect to the rear (e.g., rear), or may be arranged close to horizontal (e.g., with a certain range (e.g., +-10 degrees) based on 180 degrees).

According to various embodiments, when the foldable electronic device is in an unfolded state, the flat area of the first rotation axis is arranged perpendicular to the front (or back) of the display, or close to vertical (e.g., at 180 degrees). arranged within a certain range (e.g., +-10 degrees), and the flat area of the second rotation axis is also arranged perpendicular to the front (or back) of the display, or close to vertical (e.g., at a constant angle of 180 degrees). range (e.g. +-10 degrees) and can be positioned.

FIG. 18 is a diagram illustrating an example of a foldable electronic device including the arrangement of gears according to various embodiments. In FIG. 18, state 1801 is a diagram showing a portion of a cross section when the foldable electronic device is in a folded state, and state 1802 is a diagram showing the arrangement of gears when the foldable electronic device is in the unfolded state.

Referring to FIG. 18, when the foldable electronic device 100 is in a folded state as in state 1801, at least a portion of the display 160 is bent into a U shape, so the bent area of the display 160 and the gear A gap (gap1) may be required to prevent collisions with other devices (or collisions that may occur when the foldable electronic device is dropped in a folded state). In this regard, the central axis of the first idle gear 233 and the central axis of the second idle gear 234 are arranged in parallel with respect to the y-axis, and the central axis of the first shaft gear 231_2 is the central axis of the first idle gear 233. ) may be placed higher in the z-axis direction (e.g., in the direction of the display 160) than the central axis. The central axis of the second axis gear 232_2 is disposed higher in the z-axis direction than the central axis of the second idle gear 234, and is arranged parallel to the central axis of the first axis gear 231_2 with respect to the y-axis. You can. The first shaft gear 231_2 disposed on the first rotation shaft 231 includes a relatively smaller number of teeth than the first idle gear 233, and may be arranged to be gear-coupled with the first idle gear 233. .

In accordance with the arrangement relationship between the axis gears 231_2 and 232_2 and the idle gears 233 and 234 described above, the hinge housing 150 has concave shapes 1810 so that the axis gears 231_2 and 232_2 can be seated. 1820) and may also include concave shapes 1830 and 1840 so that the idle gears 233 and 234 can be seated. Additionally, at least a portion of the outer surface 1850 of the hinge housing 150 may include a curved surface corresponding to the rotation range of the first housing portion 110 and the second housing portion 120. Alternatively, the external curved shape 1850 of the hinge housing 150 may be formed to correspond to the rotation range of the first housing portion 110 and the second housing portion 120.

Referring to state 1802, at least one hinge structure applied to the foldable electronic device includes at least a first axis gear 231_2, a second axis gear 232_2, a first idle gear 233, and a second axis gear 232_2, as shown. It may include an idle gear (234). As described above with reference to FIG. 15 , when the foldable electronic device is in the unfolded state, when the arm portion arranged so that the relatively long first axis 1510 faces the z-axis direction is applied to the hinge structure, the first axis gear ( The flat areas of the first pillar portion 231_1 disposed at the center of 231_2) are arranged vertically based on the horizontal line (or xy-axis plane), and the angle formed with the z-axis is within 20 degrees (e.g., the first idle gear ( 233) and the second idle gear 234 may have 19 teeth, and the shaft gears 231_2 and 232_2 may have 18 teeth, within 5 degrees. According to various embodiments, a virtual first line segment 231_1a (e.g., at the center of the axis gears 231_2 and 232_2) in the y-axis direction based on the center point of the first or second rotation axis 231 or 232. When drawing a line segment drawn at the shortest distance on the flat area of the pillar portion, a virtual second line segment 231_1b connecting a point of the groove between the teeth at the center of the shaft gears 231_2 and 232_2 and the first line segment The angle between (231_1a) may be within 5 degrees. When the rotation axes 231 and 232 are implemented to have the above-described structure, the first axis gear 231_2 and the second axis gear 232_2 may have the same shape. Accordingly, it can be produced and applied without distinguishing between the left and right sides of the first and second rotation shafts 231 and 232. In addition, when arranging the first rotation shaft 231 and the second rotation shaft 232 as in state 1802, the first axis gear is positioned between the first idle gear 233 and the second idle gear 234. The degree of asymmetry between (231_2) and the second shaft gear (232_2) is reduced, making it easier to design the balance of forces.

FIG. 19 is a diagram illustrating another example of a hinge structure applied to a foldable electronic device according to various embodiments.

Referring to FIGS. 2 to 4 and FIG. 19, compared to the previously described hinge structure 200a, the hinge structure shown in FIG. 19 has an additional arm cam structure to the multi-detent structure, an additional movable cam member corresponding thereto, and elasticity. It may further include additional elastic members. For example, the hinge structure 1900 may be applied as an expanded form of the various hinge structures (eg, 200a and 200b) described above or as a replacement for at least one of the hinge structures described above.

According to various embodiments, the hinge structure 1900 includes at least rotating members 211 and 212, a fixing bracket 213, arm portions 221 and 222, and a gear structure 230, 3 It may include a multiple detent structure consisting of a pair of cam structures and cam members. Here, the rotating members, the fixing bracket, and the gear structure may be configured similarly or identically to at least some of the structures previously described in FIGS. 2 to 18. Accordingly, detailed descriptions of the components excluding the arm portions 221 and 222 and the cam members will be replaced with descriptions of the structures described above. Additionally, the operation of the arm portions 221 and 222 of the hinge structure 1900 may be the same or similar to the operation of the arm portions described above.

The arm portions 221 and 222 included in the hinge structure 1900 may implement a detent operation while engaging with a plurality of movable cam members 241a, 241b, and 241c.

The first arm portion 221 includes a first arm cam structure 221_4a and a second arm cam structure (221_4a) fastened to one side of the movable cam members 241a, 241b, and 241c included in the multiple detent structure 240. 221_4b) and a fifth arm cam structure (221_4c), and the second arm portion 222 is a third arm cam structure (222_4a) and a fourth arm coupled to the other side of the moving cam members (241a, 241b, 241c). It may include a cam structure (222_4b) and a sixth arm cam structure (222_4c).

The first rotation shaft 231 and the second rotation shaft 232 respectively fastened to the first arm 221 and the second arm 222 have the same or similar configuration and shape as the first and second rotation shafts described above. You can have it. According to one embodiment, at least one of the first and second rotation shafts 231 and 232 may have a structure in which the thickness is different for each position as previously described in FIG. 5 . According to various embodiments, the rotation axes 231 and 232 described in FIG. 19 may be formed to have a relatively longer length than the rotation axes described above. In relation to supporting the detent function, the hinge structure 1900 may include a plurality of elastic bodies 242a, 242b, 242c, 242d, 242e, and 242f. For example, the plurality of elastic bodies include a first elastic body (242a) disposed between one side of the shaft bracket (243b) and one side of the first moving cam member (241a), the other side of the shaft bracket (243b) and the first moving cam member (241a) A second elastic body (242b) disposed between the other side of the center bracket (243a), a third elastic body (242c) disposed between one side of the x-axis direction of the center bracket (243a) and one side of the second moving cam member (241b), and the center bracket (243a) A fourth elastic body 242d disposed between the other side in the It may include a fifth elastic body 242e disposed, a sixth elastic body 242f disposed between the other side of the center bracket 243a in the -x-axis direction, and the other side of the third moving cam member 241c. The plurality of elastic bodies may have similar characteristics or shapes to the elastic bodies described above.

The above-described hinge structure 1900 provides more elastic bodies, cam structures, and cam members, so that it can generate torque required for detent performance of the foldable electronic device even if the diameters of the cam structures and cam members are reduced. Support so that you can Accordingly, when the hinge structure 1900 is applied, it is possible to design cam structures and cam members with smaller diameters, thereby improving the slimness of the foldable electronic device without deteriorating detent performance. .

Figure 20 is a diagram showing an example of a first type cam device according to various embodiments.

Referring to FIGS. 1 to 20 , the first type cam device 20a according to one embodiment may be arranged so that the first type cam structure 21 and the first type cam member 22 are engaged. For example, the first type cam structure 21 may be at least one of the cam structures disposed on the arm portion described above. The first type cam member 22 may be at least one of the cam members disposed on the movable cam member described above.

The first type cam structure 21 includes, for example, a first ridge 21a and a first valley 21b, and at least one first ridge between one side of the first ridge 21a and the first valley 21b. It may include an inclined portion 21c. According to various embodiments, it may further include an inclined portion extending to the other side of the first mountain 21a, and the inclined portion extending to the other side may have the same or similar inclination as the first inclined portion 21c. The first mountain 21a may have at least a portion of the upper part of the One end of the first inclined portion 21c and one end of the other inclined portion may be continuously disposed at the left and right ends of the first mountain 21a. The other end of the first inclined portion 21c may be connected to one side of the first valley 21b. Considering that the first mountain 21a of the first type cam structure 21 protrudes in the x-axis direction, the first inclined portion 21c may form a first inclined angle 21r with the -x axis. .

For example, the first type cam member 22 may include a second mountain 21a and a second inclined portion 22c whose one end is connected to one end of the second mountain 22a. Additionally, the other end of the second inclined portion 22c of the first type cam member 22 may be connected to one side of the valley of the first type cam member 22. According to various embodiments, the first type cam member 22 may further include an inclined portion extending from the other end of the second ridge 22a. The inclined portion extending to the other end may have the same or similar inclination as the second inclined portion 22c. Similar to the first mountain 21a, the second mountain 22a is formed to be at least partially flat, and the flat area may be arranged horizontally or may be formed to have a certain slope. Considering that the second ridge 22a of the first type cam member 22 protrudes in the -x-axis direction, the second inclined portion 22c may form a second inclined angle 22r with the x-axis. . The second inclination angle 22r may be the same or similar to the first inclination angle 21r. Alternatively, the first inclination angle 21r and the second inclination angle 22r may be adjusted within a certain angle range.

The first type cam device 20a may have various mounting states. For example, the first type cam device 20a may have a first to fifth angle state as shown. The first angle state may correspond, for example, when the foldable electronic device including the first type cam device 20a is in an unfolded state (or the opening angle between the first housing portion and the second housing portion is 180 degrees). You can. In the first angle state, the first inclined portion 21c of the first type cam structure 21 and the second inclined portion 22c of the first type cam member 22 may be in line contact. As the first inclined portion 21c and the second inclined portion 22c are in line contact, the second inclined portion 22c is connected to the first valley 21b by the elastic force exerted by the elastic member 23. ) direction, and in response to this, the unfolded state of the foldable electronic device can be maintained more firmly.

According to various embodiments, when pressure is applied to the first housing portion or the second housing portion of the foldable electronic device, and the angle between the first housing portion and the second housing portion is gradually reduced, a first type cam device ( 20a) can go through the second angle state and the third angle state to the fourth angle state. The second angle state and the third angle state are, for example, states where the angle between the first housing portion and the second housing portion has an angle value exceeding 150 degrees (e.g., 170 degrees and 160 degrees), and the first type cam The first type cam structure 21 and the first type cam member 22 of the device 20a are in line contact (e.g., the area where the first mount 21a and the second mount 22a are in contact have the shape of a line). state) may be included.

The fourth angle state includes, for example, a state in which the angle between the first housing portion and the second housing portion of the foldable electronic device including the first type cam device 20a is 150 or less, and The five-angle state may include a state in which the angle between the first housing portion and the second housing portion forms an angle of 140 degrees or less. According to various embodiments, the fourth angular state is such that at least a portion of the first ridge 21a of the first type cam structure 21 and at least a portion of the second ridge 22a of the first type cam member 22 are It may include a surface contact state of the first size. The fifth angle state is such that at least a portion of the first ridge 21a of the first type cam structure 21 and at least a portion of the second ridge 22a of the first type cam member 22 are larger than the first size. It may include a surface contact state of a second size (or a state in which the surface contact size of the first mount 21a and the second mount 22a is the largest).

Figure 21 is a diagram showing the shape of a second type cam device according to various embodiments.

Referring to FIGS. 1 to 21 , the second type cam device 20b according to one embodiment may be arranged so that the second type cam structure 24 and the second type cam member 25 are engaged. For example, the second type cam structure 24 may be at least one of the cam structures disposed on the arm portion described above. The second type cam member 25 may be at least one of the cam members disposed on the moving cam member described above.

The second type cam structure 24 includes, for example, a third ridge 24a and a third valley 24b, and a third cam structure disposed between one side of the third ridge 24a and the third valley 24b. It may include an inclined portion 24c and a fourth inclined portion 24d extending to the other side of the third mountain 24a. The third mountain 24a may have at least a portion of the upper part of the x-axis flat, and the flat area may be arranged horizontally or may be formed to have a certain inclination. One end of the third slope 24c and one end of the fourth slope 24d may be continuously disposed at the left and right ends of the third mountain 24a. The other end of the third inclined portion 24c may be connected to one side of the third valley 24b. Considering that the third ridge 24a of the second type cam structure 24 protrudes in the x-axis direction, the third inclined portion 24c may form a third inclined angle 24r with the -x axis. . The fourth inclined portion 24d has a certain inclination angle with the other end of the third mountain 24a with respect to the x-axis, and the inclination angle of the fourth inclined portion 24d is greater than the third inclination angle 24r. Therefore, the fourth inclined portion 24d can be formed to be relatively gentle compared to the third inclined portion 24c.

For example, the second type cam member 25 includes a fourth mountain 25a and a fifth inclined portion 25c, one end of which is connected to one end of the fourth mountain 25a. It may include a sixth inclined portion 25d extending from the other end. Similar to the third mountain 24a, the fourth mountain 25a is formed to be at least partially flat, and the flat area may be arranged parallel to the y-axis or may be formed to have a certain inclination. Considering that the fourth ridge 25a of the second type cam member 25 protrudes in the -x-axis direction, the fifth inclined portion 25c may form a fourth inclined angle 25r with the x-axis. . The fourth inclination angle 25r may be the same or similar to the third inclination angle 24r. Alternatively, the third inclination angle 24r and the fourth inclination angle 25r may be adjusted within a certain angle range. The sixth inclined portion 25d may have a relatively gentle slope compared to the fifth inclined portion 25c. The size of the flat area of the fourth mountain 25a may be equal to or smaller than the size of the flat area of the third mountain 24a.

The second type cam device 20b may have various mounting states similar to the first type cam device 20a. For example, the first housing portion and the second housing portion of the foldable electronic device including the second type cam device 20b may have a first to fourth angle state. In the first angle state corresponding to the unfolded state of the foldable electronic device, the third ridge 24a and the fourth ridge 25a of the second type cam device 20b are in surface contact state of the first size (or may have a partial surface contact state). In the second angle state, which corresponds to the state where the angle between the first housing portion and the second housing portion is 170 degrees, the third ridge 24a and the fourth ridge 25a have a second size larger than the first size. It can be in contact state.

In the third angle state, which corresponds to the state where the angle between the first housing portion and the second housing portion is 160 degrees, the third ridge 24a and the fourth ridge 25a have a third size larger than the second size. It can be in contact state. The surface contact state of the third size may include, for example, a state in which the entire flat area of the fourth mountain 25a is in contact with the flat area of the third mountain 24a. In the fourth angle state corresponding to the state where the angle between the first housing portion and the second housing portion is 150 degrees, the third ridge 24a and the fourth mount 25a are in surface contact state of the same size as the third size. You can have At this time, the position of the fourth mountain 25a on the third mountain 24a may be different from the third angle state. The second type cam device 20b can support providing high torque by increasing the degree of compression of the elastic member 26 when the foldable electronic device is in the unfolded state.

As described above, the second type cam device 20b according to various embodiments forms the third slope 24c and the fifth slope 25c with relatively steep slopes, thereby forming a relatively wide mountain top area. By securing, it is possible to provide high elastic force and high torque through surface contact between the peaks of the second type cam structure 24 and the peaks of the second type cam member 25. Accordingly, the second type cam device 20b according to one embodiment can provide torque required for the detent function of the foldable electronic device.

According to various embodiments, the fourth slope 24d and the sixth slope 25d, which have relatively gentle slopes, may be in line contact when the foldable electronic device 100 is in a folded state.

FIG. 22 is a diagram illustrating cam structures and cam member contact states of a first type cam device and a second type cam device according to various embodiments.

Referring to FIGS. 1 to 22, the first type cam device 20a includes a cam structure (Arm) and a cam when the angle between the first and second housing portions of the foldable electronic device is greater than 150 degrees. When the member (Cam) forms a line contact and the angle between the first housing part and the second housing part is 150 degrees or less, the cam structure (Arm) and the cam member (Cam) may form some surface contact or surface contact. You can.

The second type cam device 20b is such that even when the foldable electronic device is in an unfolded state, the cam structure (Arm) and the cam member (Cam) form partial surface contact, and the cam structure (Arm) and the cam member (Cam) form partial surface contact between the first and second housing portions. When the angle is less than 170 degrees, the cam structure (Arm) and the cam member (Cam) can form surface contact.

In the first type cam device 20a and the second type cam device 20b, while the cam structures 21 and 24 and the cam members 22 and 25 are in line contact, the amount of torque generated by the elastic member is relatively small, While the cam structures 21 and 24 and the cam members 22 and 25 are in surface contact, the amount of torque generated by the elastic member may be relatively large. Accordingly, by applying the above-described first type cam device 20a and the second type cam device 20b in combination, it is possible to support securing torque for providing a detent function of a foldable electronic device.

FIG. 23 is a diagram showing an unfolded state of a first type hinge structure according to an embodiment, and FIG. 24 is a diagram showing a folded state of a first type hinge structure according to an embodiment.

19, 23, and 24, the first type hinge structure 2300 may include one first type cam device 20a and two second type cam devices 20b. The first type cam device 20a includes a first type cam structure 21 having a first inclined portion 21c and a first type cam member 22 having a second inclined portion 22c described above in FIG. 20. may include. The second type cam device 20b includes a second type cam structure 24 having a third inclined portion 24c and a second type cam member 25 having a fifth inclined portion 25c described above in FIG. 21. may include.

In the drawing, the second type cam devices 20b are arranged adjacent to each other, and the first type cam device 20a is arranged to be spaced apart from the second type cam devices 20b, but the present invention is limited to this. It doesn't work. For example, the second type cam device 20b and the first type cam device 20a are arranged adjacently (or arranged to face each other), and the other second type cam device 20b is connected to the first type cam device. It can also be placed in a location spaced apart from (20a). Additionally, the positions of the adjacent second type cam device 20b and first type cam device 20a may be changed.

FIG. 25 is a diagram showing an unfolded state of a second type hinge structure according to an embodiment, and FIG. 26 is a diagram showing a folded state of a second type hinge structure according to an embodiment.

19, 25, and 26, the second type hinge structure 2400 may include two first type cam devices 20a and one second type cam device 20b. The first type cam device 20a includes a first type cam structure 21 having a first inclined portion 21c and a first type cam member 22 having a second inclined portion 22c described above in FIG. 20. may include. The second type cam device 20b includes a second type cam structure 24 having a third inclined portion 24c and a second type cam member 25 having a fifth inclined portion 25c described above in FIG. 21. may include.

In the drawing, the second type cam device 20b and the first type cam device 20a are arranged adjacent to each other, and another first type cam device 20a is adjacent to the second type cam device 20b. Although it is arranged to be spaced apart from the first type cam device 20a, the present invention is not limited thereto. For example, based on the drawing, the first type cam devices 20a are arranged adjacent to each other, and the second type cam device 20b is placed at a position spaced apart from the first type cam devices 20a. You can also do it. Additionally, the positions of the adjacent second type cam device 20b and first type cam device 20a may be changed.

FIG. 27 is a diagram showing changes in the state and torque magnitude of cam devices according to the folding angle of a foldable electronic device to which a first type hinge structure is applied according to an embodiment.

Referring to FIGS. 19 to 27 , the angular state of the foldable electronic device employing the first type hinge structure 2300 may range from 0 degrees to 180 degrees, for example. The 0 degree state may correspond to a folded state of the foldable electronic device, and the 180 degree state may correspond to an unfolded state of the foldable electronic device. As previously described in FIGS. 23 and 24, the first type hinge structure may include two second type cam devices 20b and one first type cam device 20a.

According to various embodiments, when the foldable electronic device is unfolded at 180 degrees, the cam structure and the cam member included in one first type cam device 20a are in line contact, and the two second type cam devices The cam structure and cam member included in (20b) may be partially in surface contact. According to various embodiments, when the foldable electronic device is unfolded at 90 degrees, the cam structure and the cam member included in one first type cam device 20a have a maximum surface contact state, and the two second type cams The cam structure and cam member included in device 20b may also have a maximum surface contact state. While the foldable electronic device is folded from 180 degrees to 60 degrees, as the surface contact of the second type cam devices 20b is maintained, the folding of the elastic member is maintained constant, thereby generating a high torque due to a relatively high elastic force. By securing this, the foldable electronic device can maintain a mounted state at various angles (e.g., maintain the angle when no additional pressure is applied).

According to various embodiments, when the foldable electronic device is in a folded state at 0 degrees, the cam structure and the cam member included in one first type cam device 20a are in line contact, and the two second type cam devices 20a The cam structure and cam member included in (20b) may also have a line contact state. As the cam structures and cam members of the first type cam device 20a and the second type cam device 20b are all in line contact on the inclined surface, the elastic force supplied by the elastic member is the first type cam The device 20a and the second type cam device 20b may act to rotate in one direction (eg, the direction in which the foldable electronic device is folded). Accordingly, the foldable electronic device can maintain its folded state more firmly.

According to various embodiments, even when the foldable electronic device is folded at an angle of 30 degrees, the first type cam device 20a and the second type cam device 20b are in line contact, so even if there is no or small additional pressure, the foldable electronic device The electronic device may automatically operate in a folded (or closed) state.

In the graph showing the torque change, reference numeral 2709 shows a case where the cam structure and cam members applied to the hinge structure of the foldable electronic device are comprised only of the first type cam devices 20a. Looking at graph 2701 among the illustrated graphs, when the first type hinge structure 2300 to which the second type cam devices 20b are partially applied is adopted, the folding operation and improved folding operation are improved compared to the case where only the first type cam devices 20a are applied. It indicates that torque for the unfolding operation state can be provided.

FIG. 28 is a diagram showing changes in the state and torque magnitude of cam devices according to the folding angle of a foldable electronic device to which a second type hinge structure is applied according to an embodiment.

Referring to FIGS. 19 to 28 , the angular state of the foldable electronic device employing the second type hinge structure 2400 may range from 0 degrees to 180 degrees, for example. The 0 degree state may correspond to a folded state of the foldable electronic device, and the 180 degree state may correspond to an unfolded state of the foldable electronic device. As previously described in FIGS. 25 and 26, the second type hinge structure may include one second type cam device 20b and two first type cam devices 20a.

According to various embodiments, when the foldable electronic device is unfolded at 180 degrees, the cam structure and the cam member included in the two first type cam devices 20a are in line contact, and the one second type cam device 20a The cam structure and cam member included in (20b) may be partially in surface contact. According to various embodiments, when the foldable electronic device is unfolded at 90 degrees, the cam structure and cam member included in the two first type cam devices 20a have a maximum surface contact state, and one second type cam The cam structure and cam member included in device 20b may also have a maximum surface contact state. While the foldable electronic device is folded from 180 degrees to 60 degrees, the surface contact of the second type cam device 20b is maintained, so a relatively small torque is secured compared to the first type hinge structure 2300, but the foldable electronic device It is possible to secure enough torque to maintain various mounting angles of the device.

According to various embodiments, when the foldable electronic device is in a folded state of 0 degrees, the cam structures and cam members included in the two first type cam devices 20a are in line contact, and one second type cam device 20a is in a line contact state. The cam structure and cam member included in the cam device 20b may also have a line contact state. As the cam structures and cam members of the first type cam device 20a and the second type cam device 20b are all in line contact on the inclined surface, similar to the first type hinge structure 2300, the elastic member The elastic force supplied by may act to rotate the first type cam device 20a and the second type cam device 20b in one direction (eg, the direction in which the foldable electronic device is folded). Accordingly, the foldable electronic device can maintain its folded state more firmly.

According to various embodiments, even when the foldable electronic device is folded at a 30 degree angle, the first type cam devices 20a and the second type cam devices 20b are in line contact, so even if there is no or small additional pressure, the folder The electronic device may automatically operate in a folded (or closed) state.

In the graph showing the torque change, reference numeral 2709 shows a case where the cam structure and cam members applied to the hinge structure of the foldable electronic device are comprised only of the first type cam devices 20a. Looking at graph 2801 among the illustrated graphs, the second type hinge structure 2400 using first type cam devices 20a and one second type cam device 20b has only the first type cam devices 20a. It shows that it is possible to provide torque for improved folding and unfolding operation states compared to the applied case.

According to the various embodiments described above, a foldable electronic device according to one embodiment includes a display, a first housing portion 110 on which the display is mounted, a second housing portion 120, the first housing portion, and the It includes a hinge structure connecting a second housing portion, wherein the hinge structure includes a first rotation member connected to the first housing portion, a second rotation member connected to the second housing portion, and rotation of the first rotation member. A first arm rotating in response to, a second arm rotating in response to the rotation of the second rotating member, a first rotating shaft coupled to the first arm, and a second rotating shaft coupled to the second arm, The second arm portion includes a plurality of cam devices into which one side of the second rotation shaft is inserted, and the plurality of cam devices engage with the arm cam structure and the arm cam structure having a first inclined portion forming a first inclination. A first type cam device (20a) having a cam member having a second inclination having a similar or identical inclination to the first inclination, and an arm cam structure having a third inclination forming a second inclination steeper than the first inclination. And it may include a second type cam device (20b) having a cam member that engages with the arm cam structure and has a fourth inclination having a similar or identical inclination to the second inclination.

According to various embodiments, when the foldable electronic device is in an unfolded state (e.g., the angle between the first housing portion and the second housing portion is 180 degrees or an angle close thereto), the first type cam device is an arm cam. The mount of the structure and the mount of the cam member are contacted to a first size, and the second type cam device is such that the mount of the female cam structure and the mount of the cam member are of a second size (e.g., greater than the first size, the first size is the mount of the cam member). In the case of line contact, the second size can be contacted as much as the surface contact of the acid and the acid. At least some of the peaks of the mountains are flat, and the flat areas of the mountains may be formed horizontally or inclined at a certain angle with respect to a specific axis.

According to various embodiments, in the first type cam device, the size of the flat area of the ridge of the arm cam structure is the same or similar (e.g., the same within a certain error range) to the size of the flat area of the ridge of the cam member. can be formed.

According to various embodiments, in the second type cam device, the size of the flat area of the ridge of the female cam structure may be formed differently from the size of the flat area of the ridge of the cam member. For example, the size of the flat area of the peak of the female cam structure may be formed to be larger than the size of the flat area of the peak of the cam member.

According to various embodiments, when the foldable electronic device is in a folded state (e.g., the angle between the first housing portion and the second housing portion is 0 degrees or an angle close to it), the first type cam device is in line contact. (e.g., the inclined portion of the arm cam structure of the first type cam device is in contact with the inclined portion of the cam member of the first time cam device), and the second type cam device is also in line contact (e.g., the second type cam device The inclined portion of the arm cam structure and the inclined portion of the cam member of the second type cam device may be in contact. According to various embodiments, the inclined parts of the second type cam device that are in line contact may have a relatively gentle slope compared to other inclined parts.

FIG. 29 is a diagram illustrating another example of a cam shape according to various embodiments, and FIG. 30 is a diagram illustrating an example of a contact state of a cam and some mountains of a cam structure according to various embodiments. Prior to description, the cam 2400a according to one embodiment may be applied to at least one of the cam or cam structure previously described in FIGS. 2 to 28.

Referring to FIG. 29, the cam 2400a (or cam structure) according to one embodiment may include a cam support portion B0, a plurality of mountains M1, M2, M3, and a plurality of valleys V1, V2. there is. In the drawing, the cam 2400a is shown including three mountains (M1, M2, M3) and three valleys (V1, V2) (the valley obscured by the first mountain (M1) not shown), but in the present invention This is not limited to this. For example, the cam 2400a may have a structure including two or more cams and valleys. The plurality of valleys M1, M2, and M3 may all have the same structure. Alternatively, at least one mountain among the plurality of valleys M1, M2, and M3 may have a different shape from other mountains. For example, as shown, at least one mountain may have a structure in which the second part P2 corresponding to the center of the mountain has a certain inclination angle (an inclination angle greater than 0 degrees, for example, about 5 degrees), and the remaining at least one mountain A mountain may have a structure in which the central part of the mountain is flat.

According to one embodiment, at least one mountain of the plurality of valleys (M1, M2, M3), for example, the first mountain (M1), is a first portion (P1) having a first inclination angle (as1), as shown. , a second part (P2) having a second inclination angle (as2), and a third part (P3) having a third inclination angle (as3). One side (e.g., -y-axis end) of the first part (P1) is connected to one side (e.g., y-axis end) of the first bone (V1), and the other side of the first part (P1) (e.g., y-axis end) ) may be arranged to be connected to one side (e.g., -y-axis end) of the second part (P2). For example, the first part P1 may be composed of a ridge having a first inclination angle as1 with respect to the y-axis. The first inclination angle as1 may include an acute angle smaller than 90 from the -y axis to the y axis with respect to the x axis.

The second part (P2) has one side (e.g., -y-axis end) connected to the other side (e.g., y-axis end) of the first part (P1), and the other side (e.g., y-axis end) of the second part (P2). ) may be arranged to be connected to one side (e.g., -y-axis end) of the third part (P3). The second part (P2) may be disposed to protrude more along the x-axis than the first part (P1) and the third part (P3). The boundary area between the first part (P1) and the second part (P2) may be rounded with a designated first curvature (R1). The second part P2 may have a second inclination angle as2 with respect to the y-axis. The second inclination angle (as2) includes an acute angle smaller than 90 in the y-axis direction from the -y axis with respect to the x-axis, and the absolute value of the second inclination angle (as2) is greater than the absolute value of the first inclination angle (as1). It can be small.

The third part (P3) has one side (e.g., -y-axis end) connected to the other side (e.g., y-axis end) of the second part (P2), and the other side (e.g., y-axis end) of the third part (P3). ) may be arranged to be connected to one side (e.g., -y-axis end) of the second bone (V2). The third part (P3) may be formed to have a certain inclination from the second part (P2) to the y-axis. The boundary area between the second part P2 and the third part P3 may be rounded with a designated second curvature R2. The second curvature R2 may have a value smaller than the first curvature R1 (eg, the first curvature R1 is gentler than the second curvature R2). The third part (P3) may have a third inclination angle (as3) with respect to the -y axis. The third inclination angle (as3) includes an acute angle smaller than 90 from the y-axis to the -y-axis with respect to the x-axis, and the absolute value of the third inclination angle (as3) is greater than the absolute value of the second inclination angle (as2). It can be big. According to various embodiments, the absolute value of the third inclination angle as3 may be equal to or greater than the absolute value of the first inclination angle as1.

Referring to FIG. 30, the cam shape described in FIG. 29 may be applied to at least one cam or at least one cam structure described previously in FIGS. 2 to 28. For example, in the drawing, the protrusion of the cam 2400a may be arranged to protrude from the x-axis to the -x-axis direction, and the protrusion of the cam structure 2400b may be arranged to protrude from the -x-axis to the x-axis direction. Alternatively, the uneven portion of the cam 2400a and the uneven portion of the cam structure 2400b may be arranged to face each other. At least a portion of the second portion 2400a_P2 of the cam 2400a and at least a portion of the second portion 2400b_P2 of the cam structure 2400b may be an electronic device (e.g., electronic device 100 of FIG. 2), as shown. may be in contact during the free stop section (a section held in a specified angle range by friction of the cam 2400a and the cam structure 2400b). According to one embodiment, when the electronic device has the free-stop state described in FIG. 15 or FIG. 16, the display (display 160 of FIG. 1 or FIG. 2) uses a repelling force to restore the unfolded state (state of FIG. 14). It can be performed.

According to one embodiment, the cam 2400a is pushed in the y-axis direction by the restoring force of the display (e.g., the repulsive force of the display acts counterclockwise), and the cam structure 2400b is pushed by the restoring force of the display. -Pushing may occur in the y-axis direction (e.g., the repulsive force of the display acts clockwise). In this process, since the second part 2400a_P2 of the cam 2400a and the second part 2400b_P2 of the cam structure 2400b come into contact with the second inclination angle as2 described above, the cam 2400a of the present disclosure And the cam structure 2400b offsets at least a portion of the repulsive force (or restoring force) occurring in the unfolding direction of the display, preventing pushing in a free-stop state that may occur regardless of the user's intention (e.g., the first housing (e.g., FIG. A change in the angle between the first housing portion 110 of FIG. 1 or FIG. 2 ) and the second housing (eg, the second housing portion 120 of FIG. 1 or FIG. 2 ) may be suppressed. According to various embodiments, as shown in FIG. 15 or 16 above, the electronic device may be in a mounted state (or free-stop state) at a specific angle. In this case, the electronic device is arranged so that the cam 2400a and the cam structure 2400b are engaged as shown, so that the repulsive force or restoring force of the display can offset the force acting in the unfolded state as shown in FIG. 14. In Figure 30, both the cam 2400a and the cam structure 2400b illustrate structures in which the top portion of the mountain has a second inclination angle (as2), but the present invention is not limited thereto. For example, the second part P2 having the second inclination angle as2 may be formed only in either the cam 2400a or the cam structure 2400b.

Meanwhile, with regard to rotation in the unfolding direction, in FIG. 30, the description is made based on the direction in which the cam 2400a rotates from the -y axis (or left) to the y axis (or right), but the present invention is not limited thereto. For example, depending on the design style of the electronic device, the direction in which the cam 2400a rotates from the y-axis to the -y-axis may be the direction in which the display operates from the folded state to the unfolded state.

The hinge structures of the above-described foldable electronic device are not limited to the embodiments described in each drawing, and the hinge structures described in each drawing may be applied in complex ways. For example, a foldable electronic device according to one embodiment may include at least one first type hinge structure 2300 described in FIGS. 23 and 24, and may also include a second type hinge structure (2300) described in FIGS. 25 and 26. 2400) may include at least one. For example, a certain foldable electronic device adopts only a plurality of first type hinge structures 2300, adopts only a plurality of second type hinge structures 2400, or uses only a plurality of first type hinge structures 2300 and a second type hinge structure. (2400) can be employed in combination.

In addition, even in the hinge structure including two cam structures in one arm described in FIGS. 2 to 4, at least one of the first type cam device 20a and the second type cam device 20b described in FIGS. 20 and 21 One may apply. For example, a plurality of only the first type cam device 20a is applied to a certain arm part, a plurality of only the second type cam device 20b is applied, or a plurality of only the first type cam device 20a and the second type cam device 20b are applied to a certain arm part. ) can be employed in combination.

In addition, the structure of the fastening hole described in FIG. 15 can also be applied to at least one of the hinge structures described previously in FIGS. 1 to 14 and 16 to 28, and the structure of the axis gears 231_2 and 232_2 described in FIG. 18 can also be applied to , may be applied to at least one of the hinge structures of the various embodiments described above.

According to the various embodiments described above, a foldable electronic device according to one embodiment includes a first housing portion 110, a second housing portion 120, and at least a portion of the first housing portion and the second housing portion. It includes a flexible display 160 to be seated, a hinge structure 200 connecting the first housing part and the second housing part, and the hinge structure includes a first rotation member 211 coupled to the first housing part. , a second rotation member 212 coupled to the second housing portion, rotating in response to the rotation of the first rotation member, and a first arm cam structure 221_4a and a second rotation member spaced apart from the first arm cam structure. A first arm portion 221 including at least an arm cam structure 221_4b, rotating in response to rotation of the second rotation member, a third arm cam structure 222_4a, and a fourth arm spaced apart from the third arm cam structure. A second arm portion 222 including at least an arm cam structure 221_4b, a first fastening hole formed in the first arm cam structure, and a first rotation shaft 231 penetrating the second fastening hole formed in the second arm cam structure. ), a second rotation axis 232 passing through a third fastening hole 222_4a1 formed in the third arm cam structure and a fourth fastening hole 222_4b1 formed in the fourth arm cam structure, and the third fastening The inside of the hole and the fourth fastening hole includes flat areas and curved areas in the shape of the surface viewed in the axial direction in which the second rotation axis is inserted, and the second rotation axis is at least partially disposed in the fourth fastening hole. The first thickness of the first part may be different from the second thickness of the second part at least partially disposed in the third fastening hole.

According to various embodiments, the second rotation shaft may include a pillar part at least partially disposed in the third fastening hole and the fourth fastening hole, and an axis gear formed on one edge of the pillar part.

According to various embodiments, the pillar portion is disposed adjacent to the shaft gear, and when the second rotation shaft is fastened to the second arm portion, the first portion at least partially disposed in the fourth fastening hole, the first portion It may include the second part extending from the second part and at least partially disposed within the third fastening hole, and a third part extending from the second part and disposed through the third fastening hole.

According to various embodiments, the first thickness of the first portion is greater than the second thickness of the second portion.

According to various embodiments, the second thickness of the second portion is greater than the third thickness of the third portion.

According to various embodiments, the length of the second part is formed to be longer than the length from the inlet part of the third fastening hole of the third arm cam structure to the outlet part of the fourth fastening hole of the fourth arm cam structure. It is characterized by

According to various embodiments, the foldable electronic device includes a first press-fit protrusion disposed on an inner surface forming the third fastening hole and in contact with the second portion of the pillar part, and an inner surface forming the fourth fastening hole. It may include a second press-fit protrusion disposed in and in contact with the first portion of the pillar portion.

According to various embodiments, the first press-fit protrusion and the second press-fit protrusion have a semi-cylindrical shape, and the semi-cylindrical shape is transformed upon insertion of the second rotation shaft.

According to various embodiments, the first protrusion height of the first press-fit protrusion is different from the second protrusion height of the second press-fit protrusion.

According to various embodiments, the second protrusion height is smaller than the first protrusion height.

According to various embodiments, at least some of the first press-fit protrusion and the second press-fit protrusion are disposed between the flat area and the curved area.

According to various embodiments, the first press-fit protrusion is characterized in that it has a rail protrusion shape extending from a starting point of the third fastening hole or a midpoint of the third fastening hole to an end point.

According to various embodiments, when the third part of the pillar part of the second rotation axis is inserted into the third fastening hole through the fourth fastening hole, when the second part of the pillar part begins to contact the first press-fit protrusion , the first portion of the pillar portion is formed so as not to contact the second press-fit protrusion.

According to various embodiments, the first area of the cross section of the third fastening hole and the second area of the cross section of the fourth fastening hole are formed differently.

According to various embodiments, the first area is smaller than the second area.

According to various embodiments, the device further includes a third press-fit protrusion formed in the first fastening hole of the first arm portion, and a fourth press-fit protrusion formed in the second fastening hole of the first arm portion.

According to various embodiments, the height of the third press-fit protrusion is greater than the height of the fourth press-fit protrusion.

According to various embodiments, when the first rotation shaft is inserted into the first fastening hole through the second fastening hole, the thickness of the first rotation shaft disposed in the first fastening hole is It is characterized by being formed thinner than the thickness.

According to various embodiments, the size of the empty space at one end of the first fastening hole is smaller than the size of the empty space at one end of the second fastening hole.

According to various embodiments, when the first rotation shaft is inserted into the first fastening hole through the second fastening hole, the thickness of the first rotation shaft that passes through the first fastening hole and leaves the first fastening hole is It is formed to be thinner than the thickness of the first rotation shaft disposed in the first fastening hole, and the thickness of the first rotation shaft disposed in the second fastening hole is thicker than the thickness of the first rotation shaft disposed in the first fastening hole. It is characterized by being formed.

Each component (e.g., module or program) according to various embodiments may be composed of a single or plural entity, and some of the above-described sub-components may be omitted, or other sub-components may be variously used. Further examples may be included. Alternatively or additionally, some components (e.g., modules or programs) may be integrated into a single entity and perform the same or similar functions performed by each corresponding component prior to integration. According to various embodiments, operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or at least some operations may be executed in a different order, omitted, or other operations may be added. You can.

Claims (20)

In foldable electronic devices,
a first housing portion 110, a second housing portion 120;
a flexible display 160 at least partially seated on the first housing portion and the second housing portion;
It includes a hinge structure 200 connecting the first housing portion and the second housing portion,
The hinge structure is,
A first rotation member 211 coupled to the first housing portion;
a second rotation member 212 coupled to the second housing portion;
a first arm portion 221 that rotates in response to rotation of the first rotation member and includes at least a first arm cam structure 221_4a and a second arm cam structure 221_4b spaced apart from the first arm cam structure;
a second arm portion 222 that rotates in response to rotation of the second rotation member and includes at least a third arm cam structure 222_4a and a fourth arm cam structure 222_4b spaced apart from the third arm cam structure;
a first rotation shaft 231 passing through a first fastening hole formed in the first arm cam structure and a second fastening hole formed in the second arm cam structure;
It includes a second rotation axis 232 penetrating the third fastening hole 222_4a1 formed in the third arm cam structure and the fourth fastening hole 222_4b1 formed in the fourth arm cam structure,
The inside of the third fastening hole and the fourth fastening hole includes flat areas and curved areas when viewed in the axial direction where the second rotation shaft is inserted,
The second rotation axis is a folder characterized in that the first thickness of the first portion at least partially disposed in the fourth fastening hole is formed to be different from the second thickness of the second portion at least partially disposed in the third fastening hole. ble electronic device. According to paragraph 1,
The second rotation axis is
a pillar portion at least partially disposed in the third fastening hole and the fourth fastening hole;
A foldable electronic device comprising a shaft gear formed on one edge of the pillar portion. According to paragraph 2,
The pillar part
The first part is disposed adjacent to the shaft gear and is at least partially disposed in the fourth fastening hole when the second rotation shaft is fastened to the second arm portion;
the second part extending from the first part and at least a portion disposed within the third fastening hole;
A foldable electronic device comprising: a third part extending from the second part and disposed through the third fastening hole. According to paragraph 3,
A foldable electronic device, wherein the first thickness of the first portion is greater than the second thickness of the second portion. According to paragraph 3,
The foldable electronic device, wherein the second thickness of the second portion is greater than the third thickness of the third portion. According to paragraph 3,
The length of the second part is
A foldable electronic device, characterized in that the length is longer than the length from the entrance of the third fastening hole of the third arm cam structure to the exit of the fourth fastening hole of the fourth arm cam structure. According to paragraph 3,
a first press-fit protrusion disposed on an inner surface forming the third fastening hole and in contact with the second portion of the pillar portion;
A foldable electronic device comprising: a second press-fit protrusion disposed on an inner surface forming the fourth fastening hole and in contact with the first portion of the pillar portion. In clause 7,
A foldable electronic device, wherein a first protrusion height of the first press-fit protrusion is different from a second protrusion height of the second press-fit protrusion. In clause 7,
A foldable electronic device, wherein at least a portion of the first press-fit protrusion and the second press-fit protrusion are disposed between the flat area and the curved area. In clause 7,
The first press-fit protrusion is
A foldable electronic device characterized in that it has a rail protrusion extending from a starting point of the third fastening hole or a midpoint of the third fastening hole to an end point.
According to paragraph 1,
A foldable electronic device, wherein the first area of the cross section of the third fastening hole and the second area of the cross section of the fourth fastening hole are formed differently. According to clause 11,
A foldable electronic device, wherein the first area is smaller than the second area. According to paragraph 1,
a third press-fit protrusion formed in the first fastening hole of the first arm;
The foldable electronic device further includes a fourth press-fit protrusion formed in the second fastening hole of the first arm portion. According to clause 13,
A foldable electronic device, wherein the height of the third press-fit protrusion is greater than the height of the fourth press-fit protrusion. According to paragraph 1,
When the foldable electronic device is in an unfolded state, an inner surface of at least one of the first fastening hole and the second fastening hole has a first side wall disposed perpendicular to the display direction, and a first side wall disposed perpendicular to the display direction and A second side wall disposed to face the first side wall, a third side wall formed to connect one end of the first side wall and one end of the second side wall and forming a curved surface, the other end of the first side wall and the third side wall. A foldable electronic device comprising a fourth sidewall formed to connect the other ends of the two sidewalls and disposed opposite to the third sidewall. delete delete delete delete delete