Exterior cover and cutting device for manufacturing same

Abstract

According to an embodiment of the present disclosure, a cutting device comprises: a first holder which is rotatable; a second holder which is at least partially arranged in the first holder; a cutting tip fixed to the second holder; and an elastic member which is arranged between the first holder and the second holder, wherein the second holder can be configured to move in a first direction relative to the first holder within a preset distance range. Various other embodiments may be possible.

Description

Outer cover and cutting device for manufacturing the same

[0001] Various embodiments disclosed in this document relate to an outer cover and a cutting device for manufacturing the same.

[0002] Electronic devices can refer to devices that perform specific functions based on the programs installed on them, such as home appliances, electronic notebooks, portable multimedia players, mobile communication terminals, tablet PCs, audio / video devices, desktop / laptop computers, and car navigation systems. For example, these electronic devices can output stored information as audio or video. As electronic device integration increases and ultra-high-speed, high-capacity wireless communications become more widespread, a single electronic device, such as a mobile communication terminal, can now be equipped with a variety of functions. For example, in addition to communication functions, entertainment functions such as games, multimedia functions such as music / video playback, communication and security functions such as mobile banking, and functions such as schedule management and electronic wallets are being integrated into a single electronic device. These electronic devices are becoming smaller and more portable for users.

[0003] Because these electronic devices are susceptible to damage from external physical impact, they can be used with an external cover (or case) that covers the device's exterior. An external cover not only provides protection, but can also enhance the user's aesthetic appeal.

[0004] The outer cover may be formed with a pattern design to provide an aesthetic appeal. The pattern design may be formed on the outer surface of the outer cover through plastic processing using various equipment, such as a machine tool.

[0005] The above information may be provided as background art to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above is applicable as prior art related to the present disclosure.

[0006] According to one embodiment of the present disclosure, a cutting device includes a first holder configured to be rotatable, a second holder disposed at least partially inside the first holder, a cutting tip fixed to the second holder, and an elastic member disposed between the first holder and the second holder, wherein the second holder is configured to move relative to the first holder in a first direction within a specified distance range.

[0007] According to one embodiment of the present disclosure, an outer cover includes a first surface, a second surface facing opposite to the first surface, and a pattern structure formed on the first surface, wherein the pattern structure includes at least one recess, and a depth of the at least one recess may be from 2.7 um to 5.5 um (micrometer).

[0008] FIG. 1 is a cross-sectional view of a cutting device including an elastic member in a state before being compressed, according to one embodiment of the present disclosure.

[0009] FIG. 2 is a cross-sectional view of a cutting device including an elastic member in a compressed state according to one embodiment of the present disclosure.

[0010] FIG. 3 is a cross-sectional perspective view of a first holder according to one embodiment of the present disclosure.

[0011] FIG. 4 is a cross-sectional perspective view of a second holder according to one embodiment of the present disclosure.

[0012] FIG. 5 is a drawing showing a combined structure of a first holder and a second holder according to one embodiment of the present disclosure.

[0013] FIG. 6 is a drawing showing a joint structure of a second holder and a cutting tip according to one embodiment of the present disclosure.

[0014] FIG. 7 is a cross-sectional view showing a fixing member according to one embodiment of the present disclosure.

[0015] FIG. 8 is a drawing showing a cutting tip according to one embodiment of the present disclosure.

[0016] FIG. 9a is a drawing showing a cutting edge of a cutting tip according to one embodiment of the present disclosure.

[0017] FIG. 9b is a perspective view showing a cutting edge of a cutting tip according to one embodiment of the present disclosure.

[0018] FIGS. 10A, 10B, 10C, and 10D are drawings for explaining a process of forming a pattern using a cutting device according to one embodiment of the present disclosure.

[0019] FIG. 11 is a flowchart illustrating a process for forming a pattern on an outer cover according to one embodiment of the present disclosure.

[0020] FIG. 12 is an exploded perspective view of an electronic device according to one embodiment of the present disclosure.

[0021] FIG. 13 is a perspective view showing an outer cover according to one embodiment of the present disclosure.

[0022] FIG. 14 is a cross-sectional view taken along line AA' of FIG. 13 according to one embodiment of the present disclosure.

[0023] FIG. 15 is a cross-sectional view taken along line AA' of FIG. 13 according to one embodiment of the present disclosure.

[0024] FIG. 16 is a drawing showing the outer surface of an outer cover according to one embodiment of the present disclosure.

[0025] FIG. 17 is a drawing showing the outer surface of an outer cover according to one embodiment of the present disclosure.

[0026] FIG. 18 is a perspective view showing a micro pattern of an outer cover according to one embodiment of the present disclosure.

[0027] FIG. 19 and FIG. 20 are drawings showing a micro pattern of an outer cover according to one embodiment of the present disclosure.

[0028] Figure 21 is a drawing showing the outer surface of an outer cover according to a comparative example.

[0029] FIG. 22 is a drawing showing the outer surface of an outer cover according to one embodiment of the present disclosure.

[0030] Electronic devices according to various embodiments disclosed in this document (e.g., electronic device (200) of FIG. 12) may be devices of various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to embodiments of this document are not limited to the above-described devices.

[0031] The various embodiments of this document and the terminology used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase among those phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0032] The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0033] FIG. 1 is a cross-sectional view of a cutting device including an elastic member in a state before being compressed, according to one embodiment of the present disclosure.

[0034] FIG. 2 is a cross-sectional view of a cutting device including an elastic member in a compressed state according to one embodiment of the present disclosure.

[0035] FIG. 3 is a cross-sectional perspective view of a first holder according to one embodiment of the present disclosure.

[0036] FIG. 4 is a cross-sectional perspective view of a second holder according to one embodiment of the present disclosure.

[0037] FIG. 5 is a drawing showing a combined structure of a first holder and a second holder according to one embodiment of the present disclosure.

[0038] FIG. 6 is a drawing showing a joint structure of a second holder and a cutting tip according to one embodiment of the present disclosure.

[0039] FIG. 7 is a cross-sectional view showing a fixing member according to one embodiment of the present disclosure.

[0040] FIG. 8 is a drawing showing a cutting tip according to one embodiment of the present disclosure.

[0041] FIG. 9a is a drawing showing a cutting edge of a cutting tip according to one embodiment of the present disclosure.

[0042] FIG. 9b is a perspective view showing a cutting edge of a cutting tip according to one embodiment of the present disclosure.

[0043] The embodiments of FIGS. 1 to 9b may be combined with the embodiments of FIGS. 10a to 22.

[0044] Referring to FIGS. 1 to 9b, the cutting apparatus (100) may include a first holder (110), a second holder (120), a cutting tip (130), an elastic member (140), or a fixing member (150).

[0045] According to one embodiment, the cutting device (100) may be configured to form a micro-pattern on an exterior cover (20) of an electronic device (e.g., the exterior cover (20) of FIGS. 10A to 10D). For example, the cutting tip (130) of the cutting device (100) may contact at least a portion of the exterior surface of the exterior cover (20). As the cutting tip (130) rotates, a micro-pattern may be formed on the exterior surface of the exterior cover (20). For example, the cutting device (100) may cut at least a portion of the exterior surface of the exterior cover (20).

[0046] According to one embodiment, the cutting device (100) may be coupled or connected to a machine tool (10). The machine tool (10) may be defined and / or referred to as a machining center. The machine tool (10) may include a coupling holder (11) in which the cutting device (100) is installed (or coupled), or a drawbar (12) disposed on at least a portion of the coupling holder (11). The coupling holder (11) may be referred to as a tool holder. The drawbar (12) may be fixed to a fixed portion (112) of the cutting device (100). The drawbar (12) may be connected to a driving member (e.g., a motor) of the cutting device (100) and may be rotated based on a driving force provided from the driving member. The fixed part (112) can be rotated together with the draw bar (12) as the draw bar (12) rotates. As the fixed part (112) rotates, the cutting device (100) can be rotated inside the coupling holder (11).

[0047] According to one embodiment, the first holder (110) can be coupled or installed to the machine tool (10). The first holder (110) can be rotatably coupled to at least a portion of the machine tool (10). For example, the first holder (110) can be rotatably fitted to at least a portion of the coupling holder (11). The first holder (110) can be connected to a spindle head of the machine tool (10) via a fixing portion (112). For example, the first holder (110) can be fitted to the coupling holder (11) as the fixing portion (112) is pulled by the draw bar (12). In addition, the first holder (110) can be coupled or connected to the spindle head as the fixing portion (112) is fixed to the draw bar (12).

[0048] According to one embodiment, the first holder (110) may include a first body portion (111), a fixed portion (112), a first tapered surface (113), a first receiving portion (114), a second receiving portion (115), a grip portion (116), a third receiving portion (117), or a second tapered surface (118).

[0049] In one embodiment, the first body portion (111) may form the exterior, or body, of the first holder (110). A second holder (120) may be arranged inside the first body portion (111) (e.g., the third receiving portion (117)). In one embodiment, the first body portion (111) may be rotatable relative to at least a portion of the coupling holder (11).

[0050] According to one embodiment, the first body portion (111) may be provided in an overall spindle shape. The first body portion (111) may be defined and / or referred to as a first spindle. According to one embodiment, the first body portion (111) may be brought into close contact with at least a portion of the coupling holder (11) as the fixed portion (112) is pulled upward by the drawbar (12).

[0051] According to one embodiment, the first body part (111) can be coupled with a fixed part (112). The first body part (111) and the fixed part (112) can be formed integrally. The fixed part (112) can also be manufactured as a separate member from the first body part (111) and assembled to the first body part (111).

[0052] In one embodiment, the fixed portion (112) can be coupled to an upper portion of the first body portion (111) and connected or coupled to a drawbar (12) of the machine tool (10). The fixed portion (112) can rotate together with the drawbar (12) as the drawbar (12) rotates. The fixed portion (112) can include a pull stud bolt coupled to the first body portion (111) and the drawbar (12). In one embodiment, the fixed portion (112) can chuck the first holder (110) to the spindle head of the machine tool (10).

[0053] According to one embodiment, the first holder (110) may include a first taper surface (113). The first taper surface (113) may be formed on at least a portion of an outer surface of the first body portion (111). The first taper surface (113) may be formed to correspond to a taper surface of the coupling holder (11). The first taper surface (113) may be brought into close contact with the taper surface of the coupling holder (11) when the cutting device (100) is brought into contact with the outer cover (20), and may prevent the first body portion (111) from being inserted into the interior of the coupling holder (11).

[0054] According to one embodiment, the first holder (110) may include a first receiving portion (114), a second receiving portion (115), and a third receiving portion (117) formed inside the first body portion (111). The first receiving portion (114), the second receiving portion (115), and the third receiving portion (117) may be configured to receive at least a portion of the second holder (120). The first receiving portion (114) may be connected to the second receiving portion (115), and the second receiving portion (115) may be connected to the third receiving portion (117). The receiving portions (114, 115, 117) may be defined and / or referred to as receiving spaces.

[0055] According to one embodiment, the head portion (124) of the second holder (120) can be accommodated in the first receiving portion (114). The size (or diameter) of the first receiving portion (114) can be larger than the size (or diameter) of the head portion (124). Since the first receiving portion (114) is provided to be larger than the head portion (124), the head portion (124) can move in an up-and-down direction (e.g., in the Z-axis direction of FIGS. 1 and 2) within the first receiving portion (114). According to one embodiment, the head portion (124) can be configured to be movable in a first direction (e.g., in the Z-axis direction of FIGS. 1 and 2) within the first receiving portion (114). The height of the first receiving portion (114) in the first direction (e.g., the height in the Z-axis direction of FIGS. 1 and 2) may be greater than the height of the head portion (124) (e.g., the height in the Z-axis direction of FIGS. 1 and 2).

[0056] In one embodiment, the first receiving portion (114) may allow movement in the vertical direction with respect to the head portion (124). For example, within the first receiving portion (114), the head portion (124) may be moved in the vertical direction within a specified distance range (s). The specified distance range (s) may be defined by a difference between the height of the first receiving portion (114) (e.g., the height in the Z-axis direction of FIGS. 1 and 2) and the height of the head portion (124) (e.g., the height in the Z-axis direction of FIGS. 1 and 2).

[0057] According to one embodiment, at least a portion of the first receiving portion (114) may be configured to engage with at least a portion of the head portion (124). For example, the second receiving portion (115) may include a recess (1141) (e.g., the recess (1141) of FIG. 5) configured to allow a protruding portion (1241) of the head portion (e.g., the protruding portion (1241) of FIG. 5) to be inserted therein. The recess (1141) may be recessed into at least a portion of the first body portion (111) defining the first receiving portion (114). The recesses (1141) may be provided in multiple numbers, and the protruding portions (1241) may be provided in a number corresponding to the recesses (1141). As the protrusion (1241) is inserted into the recess (1141), when the first holder (110) is rotated in one direction (e.g., direction R of FIG. 5), the second holder (120) including the protrusion (1241) that is engaged with the recess (1141) can be rotated together. For example, the recess (1141) and the protrusion (1241) can provide an engagement structure. In addition, the recess (1141) and the protrusion (1241) can provide a power transmission structure that transmits the rotational force of the first holder (110) to the second holder (120).

[0058] According to one embodiment, the pin portion (123) of the second holder (120) can be accommodated in the second receiving portion (115). The size (or diameter) of the second receiving portion (115) may be substantially the same as the size (or diameter) of the head portion (124), or may be larger than the size (or diameter) of the head portion (124). The size (or diameter) of the second receiving portion (115) may be substantially the same as the size (or diameter) of the pin portion (123), or may be larger than the size (or diameter) of the pin portion (123). Accordingly, when the second holder (120) moves relative to the first holder (110) in the vertical direction, the pin portion (123) can move relative to the second receiving portion (115) in the vertical direction. According to one embodiment, when the second holder (120) moves downward relative to the first holder (110) (e.g., in the -Z direction of FIGS. 1 and 2), the head portion (124) may be restricted from being dislodged from the first receiving portion (114) as the second tapered surface (125) of the second holder (120) contacts the first tapered surface (118) of the first holder (110).

[0059] According to one embodiment, the third receiving portion (117) can receive the second body portion (121) of the second holder (120). The size of the third receiving portion (117) can be substantially the same as the size of the second body portion (121), or can be larger than the size of the second body portion (121). Accordingly, at least a portion of the second holder (120) including the second body portion (121) can move vertically within the first body portion (111).

[0060] According to one embodiment, the first holder (110) may further include a grip portion (116) formed on at least a portion of the outer surface of the first body portion (111). The grip portion (116) may provide a space for a tool changer to be coupled or installed. The grip portion (116) may provide an at least partially sunken groove structure. As the grip portion (116) is coupled to the tool changer, installation of the cutting device (100) on the machine tool (10) or detachment of the cutting device (100) from the machine tool (10) may be facilitated.

[0061] According to one embodiment, the first holder (110) may further include a second tapered surface (118). The second tapered surface (118) may be formed on at least a portion of the inner surface of the first body portion (111). For example, the second tapered surface (118) may be formed on at least a portion of the inner surface of the first body portion (111) defining the third receiving portion (117). The second tapered surface (118) may be formed to correspond to a third tapered surface (125) of the second holder (120). The second tapered surface (118) may be brought into close contact with the third tapered surface (125) of the second holder (120) when the second holder (120) moves downward relative to the first holder (110). The second tapered surface (118) can limit or prevent the second holder (120) from being separated from the first holder (110) by coming into contact with the third tapered surface (125). The second tapered surface (118) and the third tapered surface (125) can limit or prevent the second holder (120) from excessively protruding downward from the first holder (110). In addition, the second tapered surface (118) and the third tapered surface (125) can guide the position of the second holder (120) so that the axis of the first holder (110) and the axis of the second holder (120) are aligned.

[0062] According to one embodiment, the second holder (120) may be configured to be movable up and down relative to the first holder (110). For example, the second holder (120) may be configured to be movable relative to the first holder (110) within a specified distance range (s). For example, the second holder (120) may be configured to be movable in a 1-1 direction away from the first holder (110) (e.g., the -Z axis direction of FIGS. 1 and 2 ), or in a 1-2 direction opposite to the 1-1 direction (e.g., the +Z axis direction of FIGS. 1 and 2 ). At least a portion of the second holder (120) may be accommodated within the first holder (110). The remainder of the second holder (120) may be exposed to the outside of the first holder (110).

[0063] In one embodiment, the second holder (120) can be rotated together with the first holder (110) as the first holder (110) is rotated. In addition, as the second holder (120) is rotated, the cutting tip (130) fixed to the second holder (120) can be rotated. In one embodiment, the second holder (120) can be dynamically connected to the spindle head of the machine tool (10) via the first holder (110).

[0064] According to one embodiment, the second holder (120) may include a second body portion (121), a seating portion (122), a pin portion (123), a head portion (124), a third tapered surface (125), an insertion portion (126), or a first coupling portion (127).

[0065] In one embodiment, the second body portion (121) may form the exterior, or body, of the second holder (120). A cutting tip (130) may be disposed inside the second body portion (121) (e.g., the insertion portion (126)). In one embodiment, the second body portion (121) may move up and down relative to the first holder (110) (or the first body portion (111)).

[0066] According to one embodiment, at least a portion of the second body portion (121) may be disposed or positioned in the third receiving portion (117). The remainder of the second body portion (121) may be disposed or positioned outside of the first holder (110) (or the first body portion (111)).

[0067] According to one embodiment, the mounting portion (122) may be formed in the second body portion (121). The mounting portion (122) may be formed by being recessed from at least a portion (e.g., the upper portion) of the second body portion (121). The mounting portion (122) may provide a space for the elastic member (140) to be placed.

[0068] According to one embodiment, the pin portion (123) may be formed in the second body portion (121). For example, the pin portion (123) may be formed to protrude from at least a portion of the second body portion (121) defining the seating portion (122). An elastic member (140) may be disposed in the pin portion (123). The pin portion (123) may be referred to as a spring pipe. The elastic member (140) may be disposed in the pin portion (123) and may be at least partially accommodated in the seating portion (122).

[0069] According to one embodiment, at least a portion of the pin portion (123) may be disposed or positioned in the third receiving portion (117). Additionally, at least a portion of the pin portion (123) may be disposed or positioned in the second receiving portion (115).

[0070] According to one embodiment, the head portion (124) may be formed on the upper end of the pin portion (123). The head portion (124) may be disposed in the first receiving portion (114). The head portion (124) may be configured to move up and down inside the first receiving portion (114). According to one embodiment, the protruding portion (1241) of the head portion (124) may be configured to engage with the recess (1141) of the first receiving portion (114). Accordingly, when the first body portion (111) is rotated, the protruding portion (1241) coupled with the recess (1141) may be rotated. The protruding portion (1241) and the head portion (124) may rotate the second holder (120) based on the rotational force provided from the first holder (110). According to one embodiment, the head portion (124) may be configured to move up and down within a specified distance range (s) within the first receiving portion (114). The second holder (120) formed integrally with the head portion (124) may be configured to move up and down relative to the first holder (110) within the specified distance range (s).

[0071] According to one embodiment, the third tapered surface (125) can be formed on at least a portion of the outer surface of the second body portion (121). The third tapered surface (125) can be formed to correspond to the second tapered surface (118) of the first body portion (111). The third tapered surface (125) and the second tapered surface (118) can align the axis of the first holder (110) and the axis of the second holder (120), and can limit or prevent the second holder (120) from being separated from or excessively protruding from the first holder (110).

[0072] According to one embodiment, the insertion portion (126) may be formed inside the second body portion (121). The insertion portion (126) may provide a space for the shank portion (131) of the cutting tip (130) to be inserted (or received). The insertion portion (126) may be provided in a shape corresponding to the shank portion (131).

[0073] According to one embodiment, a first coupling portion (127) may be formed on the outer surface of the lower portion of the second body portion (121). The first coupling portion (127) may include screw threads (or screw grooves) formed on the outer surface of the second body portion (121). The first coupling portion (127) may be screw-coupled with the second coupling portion (151a) of the inner cover (151) of the fixing member (150). As the first coupling portion (127) and the second coupling portion (151a) are screw-coupled, the second holder (120) and the fixing member (150) may be fixed to each other.

[0074] According to one embodiment, the cutting tip (130) may include a shank portion (131), or a cutting knife (132). The shank portion (131) may have a pin shape. At least a portion of the shank portion (131) may be disposed or positioned within the interior of the second holder (120). For example, at least a portion of the shank portion (131) may be inserted into the insertion portion (126). The remainder of the shank portion (131) may be exposed to the outside of the second holder (120) (or the second body portion (121)).

[0075] According to one embodiment, the shank portion (131) can be fixed to the second holder (120) (or the second body portion (121)) by a fixing member (150). When the second holder (120) is rotated, the shank portion (131) and the cutting tip (130) can be rotated together.

[0076] According to one embodiment, the cutting blade (132) may include a knife for cutting. The cutting blade (132) may be coupled to or formed at one end of the shank portion (131). The cutting blade (132) may be brought into contact with the outer surface of the outer cover (20). The cutting blade (132) may cut at least a portion of the outer surface of the outer cover (20) as the cutting device (100) rotates.

[0077] According to one embodiment, the cutting edge (132) may include a first cutting edge (132a) (e.g., the first cutting edge (132a) of FIGS. 9A to 9B) and a second cutting edge (132b) spaced apart from the first cutting edge (132a) (e.g., the second cutting edge (132b) of FIGS. 9A to 9B). The second cutting edge (132b) may be spaced upward from the first cutting edge (132a). For example, when the cutting edge (132) contacts the outer cover (20), the first cutting edge (132a) may cut a relatively deeper portion of the outer cover (20) compared to the second cutting edge (132b). The second cutting edge (132b) may cut a relatively shallower portion of the outer cover (20) compared to the first cutting edge (132a).

[0078] According to one embodiment, the cutting tip (130) of the cutting device (100) can be replaceably (or detachably) coupled to the second holder (120) (or the second body part (121). Accordingly, the cutting device (100) can be coupled with a plurality of cutting tips (130) having different external diameters of the first cutting edge (132a) (e.g., the external diameter (R1) of FIG. 9a) or the external diameters of the second cutting edge (132b) as needed. Accordingly, the external diameters of the cutting edges (132a, 132b) of the cutting tip (130) for implementing a micro pattern on the outer surface of the outer cover (20) can be used in various ways, so that the size or shape of the micro pattern formed on the outer surface of the outer cover (20) can be provided in various ways (or randomly). According to one embodiment, the elastic member (140) can be arranged on the pin part (123). The elastic member (140) may be configured to be compressed against at least a portion of the seating portion (122). The elastic member (140) may include at least one of an elastically deformable coil spring or a washer (141) spring. One end of the elastic member (140) may be fixed to the seating portion (122), and the other end of the elastic member (140) may be fixed to a washer (141). Accordingly, when the elastic member (140) is repeatedly compressed or stretched, the elastic member (140) may be restricted from being detached. According to one embodiment, the elastic member (140) may be compressed by being pressed by the seating portion (122) when the second holder (120) moves upward with respect to the first holder (110). The compressed elastic member (140) may be fixed so that the second holder (120) moves downward with respect to the first holder (110). Part (122) can be pressurized.According to one embodiment, while the second holder (120) moves in the first-first direction (e.g., the -Z axis direction of FIGS. 1 and 2), the elastic member (140) can be tensioned, and while the second holder (120) moves in the first-second direction (e.g., the +Z axis direction of FIGS. 1 and 2), the elastic member (140) can be compressed.

[0079] According to one embodiment, the cutting device (100) may further include a washer (141). The washer (141) may be coupled to one end of the elastic member (140). The washer (141) may be secured to at least a portion of the second receiving portion (115) and / or the third receiving portion (117). The washer (141) may limit or prevent the elastic member (140) from being detached from the first holder (110) or the second holder (120) when the elastic member (140) is repeatedly compressed or stretched.

[0080] According to one embodiment, the fixing member (150) may include an inner cover (151), an outer cover (152), a collet portion (153), a fastening member (154), or a pressing member (155).

[0081] According to one embodiment, the inner cover (151) can be coupled with the second holder (120). The inner cover (151) can be disposed or positioned at least partially inside the outer cover (152). The inner cover (151) can include a second coupling portion (151a) for coupling with the first coupling portion (127) of the second holder (120). The second coupling portion (151a) can include a screw thread (or screw groove). The second coupling portion (151a) can be screw-coupled with the first coupling portion (127).

[0082] According to one embodiment, the outer cover (152) may be positioned on the outside of the inner cover (151). The outer cover (152) may be configured to surround the inner cover (151) and / or the collet portion (153).

[0083] According to one embodiment, the collet portion (153) may be disposed on the inner side of the inner cover (151). The collet portion (153) may be configured to secure the cutting tip (130) to the second holder (120). For example, the collet portion (153) may include a collet jaw. The collet jaws may be provided in at least three or more, but are not limited thereto. The collet portion (153) may press the shank portion (131) of the cutting tip (130) as the collet jaw is pressed by the second bolt. The shank portion (131) may be secured to the fixing member (150) as the outer surface of the shank portion (131) is pressed by the collet jaw.

[0084] According to one embodiment, the fastening member (154) may be coupled to the inner cover (151) by penetrating the outer cover (152). The inner cover (151) may be fixed to the outer cover (152) by the fastening member (154). The fastening member (154) may include, but is not limited to, a screw.

[0085] According to one embodiment, the pressing member (155) can press the outer surface of the inner cover (151) by penetrating the outer cover (152). When the pressing member (155) is fixed to the outer cover (152), an end of the pressing member (155) can press the outer surface of the inner cover (151). As the inner cover (151) is pressed by the pressing member (155), the collet portion (153) disposed inside the inner cover (151) can be pressed by the inner cover (151). The collet jaw of the collet portion (153) can press the shank portion (131) based on the force provided from the pressing member (155). Accordingly, the shank portion (131) can be coupled with the collet portion (153). The pressurizing member (155) may include, but is not limited to, a bolt (e.g., a hexagonal bolt).

[0086] According to one embodiment, the cutting device (100) can be rotated together with the draw bar (12) as the first holder (110) is rotated by the draw bar (12). The cutting tip (130) (e.g., cutting blade (132)) of the cutting device (100) can be brought into contact with the outer surface of the outer cover (20). As the cutting tip (130) is rotated, the outer surface of the outer cover (20) can be cut, and a fine pattern can be formed.

[0087] According to one embodiment, as the first holder (110) rotates, the second holder (120) fixed to the first holder (110) can rotate. As the second holder (120) rotates, the cutting tip (130) fixed to the second holder (120) can rotate.

[0088] According to one embodiment, the second holder (120) can move up and down inside the first holder (110). For example, the second holder (120) can move up and down relative to the first holder (110). For example, at least a portion of the first body portion (111) of the second holder (120) accommodated in the third accommodation portion (117) of the first holder (110) can move up and down in the third accommodation portion (117). For example, when the cutting tip (130) of the cutting device (100) contacts the outer cover (20), the second holder (120) can move upward relative to the first holder (110) due to the contact load (or cutting load). In addition, when the cutting tip (130) of the cutting device (100) is separated from the outer cover (20), the contact load (or cutting load) disappears, so that the second holder (120) can move downward with respect to the first holder (110). For example, the second holder (120) can move downward with respect to the first holder (110) by the seating portion (122) being pressed by the elastic restoring force provided from the elastic member (140).

[0089] According to one embodiment, the second holder (120) may be configured to be relatively movable in a first direction (e.g., the Z-axis direction of FIGS. 1 and 2) within a range of a first distance (d1) specified within the first holder (110). For example, the first direction may be defined as an up-down direction.

[0090] According to one embodiment, when the cutting tip (130) of the cutting device (100) contacts the outer cover (20), the second holder (120) can move upward with respect to the first holder (110) due to the repulsive force resulting from the contact. When the second holder (120) moves upward, the elastic member (140) pressed by the seating portion (122) of the second holder (120) can be compressed. The second holder (120) can move upward within a range of a first distance (d1) within the first receiving portion (114). For example, the first distance (d1) can be defined as a distance within which the receiving portion can move within the first receiving portion (114). The first distance (d1) can be defined as a difference between the height of the head portion (124) and the height of the first receiving portion (114). The second holder (120) can move in the vertical direction within a range of a first distance (d1) with respect to the first holder (110).

[0091] According to one embodiment, the elastic member (140) can buffer the repulsive force generated by the contact between the outer cover (20) and the cutting device (100). Accordingly, the repulsive force applied to the cutting device (100) or the machine tool (10) is reduced, thereby improving the maintainability of the cutting device (100) or the machine tool (10). In addition, the precision of the cutting process using the cutting device (100) or the machine tool (10) can be improved.

[0092] According to one embodiment, when the cutting device (100) (e.g., the first holder (110)) moves away from the outer cover (20), the compressed elastic member (140) may be tensioned. When the elastic member (140) is tensioned, the second holder (120) may be pressed by the elastic member (140) to move downward with respect to the first holder (110). As the second holder (120) moves downward with respect to the first holder (110), even when the first holder (110) moves away from the outer cover (20), the cutting tip (130) may be maintained in contact with the outer cover (20). In this case, the force with which the cutting tip (130) of the cutting device (100) presses against the outer cover (20) may be relatively reduced. Thereafter, when the second tapered surface (118) and the third tapered surface (125) come into contact (or, when the head portion (124) is caught by the second receiving portion (115)), the downward movement of the second holder (120) with respect to the first holder (110) may be restricted. In this case, when the first holder (110) is relatively further away from the outer cover (20), the cutting tip (130) may be separated from the outer cover (20).

[0093] According to one embodiment, the cutting device (100) can be moved forward or backward toward the outer cover (20) by the machine tool (10). Additionally, the cutting device (100) can be moved in a surface direction of the outer cover (20) (e.g., in the X-axis direction or the Y-axis direction orthogonal to the Z-axis) by the machine tool (10).

[0094] According to one embodiment, the cutting device (100) can move in the direction of the surface of the outer cover (20) while in contact with the outer cover (20). Accordingly, a micro pattern or a color material finish (CMF) design can be implemented or formed on the outer surface of the outer cover (20).

[0095] According to one embodiment, when the cutting tip (130) of the cutting device (100) contacts the outer surface of the outer cover (20), the processing load (or contact load) of the cutting device (100) can be adjusted within a range of about 11 MPa or less as the elastic member (140) is compressed. For example, the processing load of the cutting device (100) can be provided at a level of about 10 MPa or less. Accordingly, in the fine pattern forming process, as the outer cover (20) is processed with a low-strength processing load, the formation of surface defects (e.g., burrs) on the outer surface of the outer cover (20) can be limited or reduced. When the fine pattern of the outer cover (20), or the CMF design, is formed, the outer cover (20) can have a clean pattern cross-section shape as the occurrence of surface bonding is reduced. Accordingly, the production efficiency of the outer cover (20) having a fine pattern can be improved because subsequent processes (e.g., polishing processes, etc.) due to surface defects are not required.

[0096] According to one embodiment, as the machining load of the cutting device (100) is provided at a low level, the precision of the process of forming a fine pattern can be improved.

[0097] FIGS. 10A, 10B, 10C, and 10D are drawings for explaining a process of forming a pattern using a cutting device according to one embodiment of the present disclosure.

[0098] The embodiments of FIGS. 10A to 10D may be combined with the embodiments of FIGS. 1 to 9B, or the embodiments of FIGS. 11 to 22.

[0099] Referring to FIGS. 10a to 10d, a process for forming a fine pattern by cutting the outer surface of an outer cover is described.

[0100] The configuration of the cutting device (100) of FIGS. 10a to 10d may be partially or entirely identical to the configuration of the cutting device (100) of FIGS. 1 to 9b. Hereinafter, for convenience of explanation, the components of FIGS. 1 to 9 may be referred to.

[0101] Referring to Fig. 10a, the cutting device (100) can be moved toward the outer cover (20) by the machine tool (10). Fig. 10a illustrates a state in which the cutting tip (130) first comes into contact with the outer cover (20) (e.g., a state before the elastic member (140) is compressed). At this time, the vertical distance between the outer cover (20) and the first holder (110) may be a first distance (h1).

[0102] When the cutting device (100) moves further toward the outer cover (20) in a state as in Fig. 10a, the positions of the cutting tip (130) and the second holder (120) can be fixed, as in Fig. 10b, and the first holder (110) can come closer to the outer cover (20). Fig. 10b illustrates a state in which the first holder (110) is relatively close to the outer cover (20) (e.g., a state in which the elastic member (140) is compressed). At this time, the vertical distance between the outer cover (20) and the first holder (110) may be a second distance (h2). The second distance (h2) may be smaller than the first distance (h1). When changing from FIG. 10a to FIG. 10b, the cutting load applied from the cutting device (100) to the outer cover (20) and the repulsive force applied from the outer cover (20) to the cutting device (100) may increase. The cutting load and the repulsive force may increase gradually rather than rapidly as the elastic member (140) is compressed.

[0103] When the cutting device (100) moves away from the outer cover (20) in a state as in Fig. 10b, the positions of the cutting tip (130) and the second holder (120) can be fixed, as in Fig. 10c, and the first holder (110) can move away from the outer cover (20). Fig. 10c illustrates a state in which the first holder (110) is relatively far from the outer cover (20) (e.g., a state in which the elastic member (140) is tensioned). At this time, the vertical separation distance between the outer cover (20) and the first holder (110) may be a third separation distance (h3). The third separation distance (h3) may be greater than the second separation distance (h2). When changing from FIG. 10b to FIG. 10c, the cutting load applied from the cutting device (100) to the outer cover (20) and the repulsive force applied from the outer cover (20) to the cutting device (100) may decrease. The cutting load and the repulsive force may decrease gradually rather than abruptly as the elastic member (140) is tensioned.

[0104] When the cutting device (100) moves away from the outer cover (20) in a state such as FIG. 10c, the cutting tip (130) may be separated from the outer cover (20) as shown in FIG. 10d. FIG. 10d illustrates a state in which the cutting tip (130) is separated from the outer cover (20) (e.g., a state in which the elastic member (140) is fully tensioned). At this time, the vertical separation distance between the outer cover (20) and the first holder (110) may be a fourth separation distance (h4). The fourth separation distance (h4) may be greater than the third separation distance (h3).

[0105] According to one embodiment, the cutting device (100) may be configured to be able to adjust the cutting load applied to the outer cover (20) as the elastic member (140) is compressed and stretched. In addition, the cutting device (100) may be configured to be able to adjust the relative distance between the first holder (110) and the outer cover (20). Accordingly, since the cutting load is configured to be finely adjustable, the process of forming a fine pattern on the outer cover (20) can be finely adjusted. For example, the cutting load can be adjusted by maintaining the cutting tip (130) in contact with the outer cover (20) and adjusting the relative distance between the first holder (110) and the outer cover (20). Accordingly, the fine pattern formed on the outer surface of the outer cover (20) can have a neat cross-sectional shape and can be provided in various pattern shapes.

[0106] FIG. 11 is a flowchart illustrating a process for forming a pattern on an outer cover according to one embodiment of the present disclosure.

[0107] The embodiment of FIG. 11 may be combined with the embodiments of FIGS. 1 to 10d, or the embodiments of FIGS. 12 to 22.

[0108] Referring to Fig. 11, a process for forming a micro-pattern on the outer surface of an outer cover is described. To explain Fig. 11, the configurations of Figs. 1 to 10b may be referred to.

[0109] According to one embodiment, the machine tool (10) may be configured to control vertical movement of the cutting device (100) or movement of the outer cover of the cutting device (100) in the surface direction. The machine tool (10) may include a controller including a processor and a memory. The controller may be defined and / or interpreted as a part of the cutting device (100). For example, the cutting device (100) may include the controller. The controller may be configured to control the operation of at least one component of the machine tool (10) and / or the cutting device (100), or to control the operation of the machine tool (10) and / or the cutting device (100). The controller according to an exemplary embodiment of the present disclosure may be implemented through a nonvolatile memory (not shown) configured to store data regarding an algorithm configured to control the operation of various components or software instructions for reproducing the algorithm, and a processor (not shown) configured to perform the operations described below using the data stored in the memory. Here, the memory and processor may be implemented as separate chips. Alternatively, the memory and processor may be implemented as a single, integrated chip. The processor may take the form of one or more processors.

[0110] Hereinafter, the process of forming a fine pattern can be defined as being controlled by a control unit (or processor).

[0111] According to one embodiment, the process for forming a micro-pattern may include a design random designation process (1010). The design random designation process (1010) may be a process for designating one design from among micro-pattern designs stored in a memory within a specified range value by a random factor method. The specified range may be a range value specified by a user or an input range value. For example, the specified range may include a pattern design element (1011) determined by the user. For example, the design random designation process (1010) may be provided as a process for a control unit (or processor) to designate a design element to be implemented on the outer surface of the outer cover (20) within a specified range value for each of the design elements (1012, 1013, 1014, 1015, 1016, 1017) by a random factor method. For example, the implementation value of any one design element (1012, 1013, 1014, 1015, 1016, 1017) per unit area or per unit length of the micro pattern formed on the outer surface of the outer cover (20) can be specified by a random argument method, and the implementation value can be constant in the unit area range or unit length range or can vary within the specified range value range. Accordingly, since the design elements of each of the plurality of micro patterns implemented on the outer surface of the outer cover (20) are implemented randomly (or differently), the shape or design of the micro pattern can be provided irregularly. For example, the pattern design element (1011) can include the directionality of the micro pattern (1012), the length of the micro pattern (1013), the curvature range of the pattern processing path (1014), the pattern processing depth range (1015), the pattern spacing range and overlapping range (1016), or the pattern size range (1017). The curvature range (1014) of the pattern processing path may be a value for the radius of curvature or the range of curvature of the cross-sectional shape when the cross-sectional shape of the micro pattern has a cross-sectional shape having a radius of curvature.Additionally, the curvature range (1014) of the pattern processing path may be a range within which the curvature of the micro-pattern on the path may vary within a specified curvature range. Additionally, for example, the pattern processing depth range (1015) may be defined as the depth of the recess (1141) of the pattern structure of the outer cover (e.g., depth (t) of FIG. 14).

[0112] The process for forming a fine pattern may further include a pattern area designation process (1030). The pattern area designation process (1030) may be defined as a process in which the control unit sets an area in which a fine pattern is formed among the outer cover. The pattern area may be an area set by the user or a designated area. When the pattern area designation process (1030) is completed, the control unit may be configured to reset the pattern area set by the user to fit the modeling shape (1031). For example, when the outer cover has a seamless edge or a three-dimensional cross-sectional shape, the control unit may reset the pattern area in three dimensions (1031) in order to provide movement and cutting of the cutting device (100) in three dimensions (e.g., a combination of the X-axis, the Y-axis, and the Z-axis).

[0113] The process of forming a fine pattern may further include a process of randomly designating pattern coordinates (1050). The process of randomly designating pattern coordinates may be a process in which a control unit randomly designates a location or coordinates at which a pattern is to be formed within a pattern area using a random argument method.

[0114] The process of forming a fine pattern may further include a process of randomly designating a processing order (1070). The process of randomly designating a processing order (1070) may be a process in which the control unit randomly designates the generation order of one pattern and another pattern among the designated pattern areas by a random factor method. In addition, the process of randomly designating a processing element (1071) designated by the user may be a process. The processing element (1071) may include a pattern processing speed (1072). The pattern processing speed (1072) may be defined as a rotational speed of the cutting device (100) or the cutting tip (130). For example, the control unit may determine a cutting load based on the pattern processing depth (1015), the pattern processing speed (1073), and the material of the outer cover. For example, when the pattern processing speed (1072) is set to a first speed value and the pattern processing depth (1015) is set to a first depth, in order to form a pattern on an outer cover having a first strength, the cutting tip (130) may be brought into contact with the outer cover for 0.3 seconds while the elastic member (140) is compressed by 0.2 mm, so that a pattern having the first depth may be formed. When the pattern processing speed (1072) is set to a first speed value and the pattern processing depth (1015) is set to a first depth, in order to form a pattern on an outer cover having a second strength lower than the first strength, the cutting tip (130) may be brought into contact with the outer cover for 0.3 seconds while the elastic member (140) is compressed by less than 0.2 mm, so that a pattern having the first depth may be formed. In this way, the control unit can adjust the cutting load in response to outer covers having various strengths by adjusting the compression length of the elastic member. The compressed length of the elastic member (140) can be detected by a sensor or calculated through the distance from the first holder (110) to the outer cover.In addition, the elastic member (140) can pressurize the seating portion (122) in a compressed state, and the pressed seating portion (122) and the second holder (120) can pressurize the outer surface of the outer cover. When the elastic member (140) is compressed, elastic energy corresponding to the compressed length of the elastic member (140) (e.g., elastic energy (U) = 1 / 2*k*x^2, where k is a spring constant and x is the compressed length of the elastic member (140)) can be formed. The elastic energy can be in a proportional relationship with the cutting load that the cutting device (100) applies to the outer cover, or the repulsive force that the outer cover applies to the cutting device (100).

[0115] According to one embodiment, the micro-pattern formation process may further include pattern processing (1090). The pattern processing process (1090) may be a process of forming a pattern on the outer surface of the outer cover by controlling the cutting device (100) based on the set processes (1010, 1030, 1050, 1070) of the control unit.

[0116] According to one embodiment, the control unit may be set to control the processes (1010, 1030, 1050, 1070, 1090) by a numerical control method, and the elements (1011, 1071) and the pattern area reset process (1031) may be set to control them by a random argument method.

[0117] FIG. 12 is an exploded perspective view of an electronic device according to one embodiment of the present disclosure.

[0118] FIG. 13 is a perspective view showing an outer cover according to one embodiment of the present disclosure.

[0119] FIG. 14 is a cross-sectional view taken along line AA' of FIG. 13 according to one embodiment of the present disclosure.

[0120] FIG. 15 is a cross-sectional view taken along line AA' of FIG. 13 according to one embodiment of the present disclosure.

[0121] The embodiments of FIGS. 12 to 15 may be combined with the embodiments of FIGS. 1 to 11, or the embodiments of FIGS. 15 to 22.

[0122] Referring to FIG. 12, the electronic device (200) may include at least one of a front plate (222), a display (220), a bracket (232) (e.g., a front support member), a printed circuit board (240), a battery (250), a rear case (260), an antenna (270), and a rear plate (280). In one embodiment, the electronic device (200) may omit at least one of the components (e.g., the rear case (260)) or may additionally include other components.

[0123] According to one embodiment, the electronic device (200) may include a housing including a front plate (222), a side bezel structure (231), and a back plate (280). The front plate (222) may form at least a portion of the front of the electronic device (200). The back plate (280) may form at least a portion of the back of the electronic device (200). The side bezel structure (231) may form at least a portion of a side connecting the front and back of the electronic device (200). The housing of the electronic device (200) may form at least a portion of the exterior of the electronic device (200). The front plate (222) may include a substantially transparent material (e.g., a glass plate including various coating layers, or a polymer plate). The back plate (280) may be formed of glass, ceramic, polymer, metal (e.g., titanium (Ti), stainless steel (STS), aluminum (Al), and / or magnesium (Mg)), or a combination of at least two of the above materials.

[0124] According to one embodiment, the bracket (232) may be disposed inside the electronic device (200) and connected to the side bezel structure (231), or may be formed integrally with the side bezel structure (231). The bracket (232) may be formed of, for example, a metallic material and / or a non-metallic (e.g., polymer) material. The bracket (232) may accommodate a display (220) on one surface and a printed circuit board (240) on the other surface. A processor, memory, and / or an interface may be mounted on the printed circuit board (240).

[0125] According to one embodiment, the battery (250) is a device for supplying power to at least one component (e.g., a camera module (212)) of the electronic device (200), and may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. At least a portion of the battery (250) may be disposed substantially on the same plane as, for example, the printed circuit board (240). The battery (250) may be disposed integrally within the electronic device (200), or may be disposed detachably from the electronic device (200).

[0126] In one embodiment, the display (220) may be positioned inside the housing. The display (220) may provide a visual image to the user through the front plate (222).

[0127] According to one embodiment, the rear case (260) may be positioned between the printed circuit board (240) and the antenna (270). For example, the rear case (260) may include one surface to which at least one of the printed circuit board (240) or the battery (250) is coupled, and the other surface to which the antenna (270) is coupled.

[0128] In one embodiment, the antenna (270) may be positioned between the rear plate (280) and the battery (250). The antenna (270) may include, for example, a near field communication (NFC) antenna, a wireless charging antenna, and / or a magnetic secure transmission (MST) antenna. The antenna (270) may, for example, perform short-range communication with an external device or wirelessly transmit and receive power required for charging. For example, the antenna (270) may include a coil for wireless charging. In another embodiment, the antenna structure may be formed by a portion or a combination of the side bezel structure (231) and / or the bracket (232).

[0129] According to one embodiment, the electronic device (200) may include a camera module (212) disposed within a housing. According to one embodiment, the camera module (212) may be a rear camera module (212) disposed on a bracket (232) and capable of acquiring an image of a subject located at the rear (e.g., in the -Z direction) of the electronic device (200). According to one embodiment, at least a portion of the camera module (212) may be exposed to the outside of the electronic device (200) through an opening (282) formed in a rear plate (280).

[0130] Referring to FIGS. 13 and 14, the rear plate (280) may include an inner surface (282) facing the inside of the electronic device (200) (+Z direction) and an outer surface (281) facing in the opposite direction (-Z direction) to the inner surface (281). According to one embodiment, the rear plate (280) may be defined and / or referred to as an exterior cover (280) of the electronic device (200). The rear plate (280) may form at least a portion of a housing formed to surround at least a portion of the display (220). The outer surface (281) may be defined and / or referred to as a first surface (281), and the inner surface (282) may be defined and / or referred to as a second surface (282).

[0131] According to one embodiment, a pattern structure (283) may be formed on a first surface (281) of an outer cover (280) (e.g., the outer cover (20) of FIGS. 10A to 10D). The pattern structure (283) may be formed by cutting the first surface (281) of the outer cover (280) by a cutting device (e.g., the cutting device (100) of FIGS. 1 to 10D). The pattern structure (283) may include at least one recess (283a) formed in the first surface (281) of the outer cover (280). The pattern structure (283) may also be referred to as a micro-pattern formed on the first surface (281) of the outer cover (280).

[0132] According to one embodiment, since the cutting device (100) is configured to be able to finely adjust the cutting load, the depth (t) and width (w) of at least one recess (283a) of the pattern structure (283) can be finely adjusted. For example, the depth (t) of the at least one recess (283a) can be about 2.7 um to about 5.5 um (micrometer). The depth (t) can be about 3.0 um to about 5.0 um. The depth (t) can be referred to as a maximum depth (t). For example, the maximum depth (t) of the at least one recess (283a) can be defined as the depth of the deepest part of the at least one recess (283a) with respect to the first surface (281) of the outer cover (280). In addition, the maximum depth (t) of at least one recess (283a) may be defined as the depth of the deepest part in the vertical direction (e.g., Z-axis direction) from the boundary (281a) between adjacent recesses (283a). The boundary (281a) may be defined as the boundary (281a) between one recess (283a) and an adjacent recess (283a). The boundary (281a) may be defined as a portion of the first surface (281) where the recess (283a) is not formed. For example, the width (w) of at least one recess (283a) may be defined as the distance between the boundary (281a) and the boundary (281a) between adjacent recesses (283a). The width (w) of at least one recess (283a) may be about 9 um to about 11 um. For example, the width (w) may be about 10 um.

[0133] According to one embodiment, since the cutting device (100) is configured to be able to finely adjust the cutting load, the visibility of the boundaries (281a) of the recesses (283a) of the pattern structure (283) can be improved. For example, the boundaries (281a) of the recesses (283a) of the pattern structure (283) can have an inclination angle (d). The inclination angle (d) can be defined as an angle at which the boundary (281a) is inclining with respect to the first surface (281). For example, the inclination angle (d) can be defined as a sharpness value. The inclination angle (d) can be about 3.6 degrees to about 5.5 degrees. For example, the inclination angle (d) can be about 4 degrees to about 5 degrees. The cross-section of the pattern structure (283) cut by the cutting device (100) can be provided in a clean shape, so that the inclination angle (d) can be provided in a range of about 4 degrees to about 5 degrees, and accordingly, the identifiability of the pattern structure (283) visually provided to the user can be improved.

[0134] According to one embodiment, since the cutting device (100) is configured to be able to finely adjust the cutting load, the step difference of the boundaries (281a) of the recesses (283a) of the pattern structure (283) can be provided small. For example, the step difference of the boundaries (281a) can be defined as the difference between the vertical distance from the second surface (282) of the outer cover (280) to one boundary (281a) and the vertical distance to another boundary (281a) adjacent to one boundary (281a). According to one embodiment, since the cutting device (100) is configured to be able to finely adjust the cutting load, the cross-section of the pattern structure (283) can be provided cleanly, and the step difference of the boundaries (281a) can be provided small. For example, the step difference can be defined and / or referred to as a machining step difference or a height step difference, and can be about 0 um to about 5.5 um.

[0135] According to one embodiment, since the cutting device (100) is configured to be able to finely adjust the cutting load, the outer cover (280) can have a thin thickness (L). For example, the thickness (L) can be the thickness in the vertical direction from the first surface (281) to the second surface (282) of the outer cover (280). Since the cutting device (100) is configured to be able to adjust the cutting load to about 10 MPa or less, a pattern structure (283) can be formed even on the outer cover (280) having a thin thickness (L). The thickness (L) can be about 3.3 mm or less. For example, the thickness (L) can be about 3.0 mm or less.

[0136] Referring to FIGS. 13 and 15, a pattern structure (283) may be formed on a first surface (281) of an outer cover (280) (e.g., the outer cover (20) of FIGS. 10a to 10d). The pattern structure (283) may be formed by cutting the first surface (281) of the outer cover (280) by a cutting device (e.g., the cutting device (100) of FIGS. 1 to 10d). The pattern structure (283) may include at least one recess formed in a depression in the first surface (281) of the outer cover (280). The at least one recess may include a plurality of recesses (283b, 283b, 283c, 283d). The pattern structure (283) may also be referred to as a micro-pattern formed on the first surface (281) of the outer cover (280).

[0137] According to one embodiment, since the cutting device (100) is provided to be able to randomly implement design elements of a fine pattern (e.g., design element (1011) of FIG. 11), the depths (t1, t2, t3, t4) and widths (w1, w2, w3, w4) of the plurality of recesses (283b, 283c, 283d, 283e) of the pattern structure (283) may be provided with different values. In addition, the inclination angles of the plurality of recesses (283b, 283c, 283d, 283e) of the pattern structure (283) may be provided with different values.

[0138] According to one embodiment, the cutting device (100) is configured to be able to finely adjust the cutting load, thereby improving the visibility of the boundaries (281a) of the recesses (283b, 283c, 283d, 283e) of the pattern structure (283). For example, the boundaries (281a) of the recesses (283b, 283c, 283d, 283e) of the pattern structure (283) may have various inclination angles.

[0139] FIG. 16 is a drawing showing the outer surface of an outer cover according to one embodiment of the present disclosure.

[0140] FIG. 17 is a drawing showing the outer surface of an outer cover according to one embodiment of the present disclosure.

[0141] FIG. 18 is a perspective view showing a micro pattern of an outer cover according to one embodiment of the present disclosure.

[0142] FIG. 19 and FIG. 20 are drawings showing a micro pattern of an outer cover according to one embodiment of the present disclosure.

[0143] Figure 21 is a drawing showing the outer surface of an outer cover according to a comparative example.

[0144] FIG. 22 is a drawing showing the outer surface of an outer cover according to one embodiment of the present disclosure.

[0145] The embodiments of FIGS. 16 to 22 may be combined with the embodiments of FIGS. 1 to 15.

[0146] The outer covers of FIGS. 16, 17, 18, 19, 20, and 22 may be outer covers having a fine pattern formed through the cutting device (100) of FIGS. 1 to 10d (e.g., the outer cover (20) of FIGS. 10a to 10d, or the outer cover (280) of FIGS. 12 to 15).

[0147] Referring to FIGS. 16, 17, 18, 19, 20, and 22, the micro-pattern of the outer cover is illustrated in a state where the boundary of the pattern is clearly formed. In addition, the three-dimensional effect of the micro-pattern of the outer cover provided to the user can be improved by limiting or reducing the formation of surface defects (e.g., burrs) on the outer surface of the outer cover.

[0148] The outer cover of Fig. 21 has a pattern created by a cutting device that does not include an elastic member. Examining the pattern of the outer cover of Fig. 21, the cutting load of the cutting device is provided in the range of about 500 MPa to about 1100 MPa, thereby showing the formation of surface defects (e.g., burrs) during the cutting process. Furthermore, due to the inability to finely control the cutting depth, the pattern boundaries are unclear.

[0149] The outer cover of Fig. 22 has a pattern created by a cutting device including the elastic member of Figs. 1 to 10d. Examining the pattern of the outer cover of Fig. 22, it is shown that the cutting load of the cutting device is provided at approximately 10 MPa or less, so that surface defects (e.g., burrs) are practically not formed during the cutting process. Furthermore, by finely adjusting the cutting depth, a clear boundary between patterns is shown.

[0150] Electronic devices may include an external cover that forms the exterior of the electronic device, as they are susceptible to damage from external physical impact. The external cover can be manufactured in a variety of ways.

[0151] To provide a variety of visual effects for the outer cover, a patterned structure can be formed on the outer surface of the outer cover through a cutting process. To create the patterned structure, the outer surface of the outer cover can be forged using a hammer or press, or the pattern can be formed through a CNC machining process using a CNC cutting device.

[0152] The forging process or CNC machining process has a problem in that the load applied to the outer cover or the repulsive force applied to the equipment from the outer cover is excessively large, which prevents the pattern of the outer cover from being neatly formed and reduces the durability of the equipment.

[0153] According to one embodiment of the present disclosure, a cutting device capable of finely controlling a cutting load and an outer cover formed thereby can be disclosed.

[0154] According to one embodiment of the present disclosure, an outer cover can be disclosed in which the boundaries between patterns are clearly identifiable to a user by finely adjusting the cutting load of a cutting device.

[0155] However, the problem to be solved in this disclosure is not limited to the problem mentioned above, and may be determined in various ways without departing from the spirit and scope of this disclosure.

[0156] According to one embodiment of the present disclosure, the formation of surface defects (e.g., burrs) on the outer surface of an outer cover having a fine pattern formed thereon is limited or reduced, so that a post-processing process for removing surface defects is not required, thereby simplifying the pattern forming process of the outer cover.

[0157] According to one embodiment of the present disclosure, an outer cover having various color material finishing (CMF) designs can be provided by finely adjusting the width and depth of the micro-pattern.

[0158] According to one embodiment of the present disclosure, since the width and depth of the micro-pattern can be finely adjusted, a pattern forming process can be performed in a random acquisition manner, and thus an outer cover with a non-artificial design can be provided.

[0159] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present disclosure belongs from the description below.

[0160] According to one embodiment of the present disclosure, a cutting device (100) may include a first holder (110), a second holder (120), a cutting tip (130), or an elastic member (140). The first holder (110) may be configured to be rotatable. The second holder (120) may be disposed at least partially inside the first holder. The cutting tip (130) may be fixed to the second holder. The elastic member (140) may be disposed between the first holder and the second holder. The second holder may be configured to move relative to the first holder in a first direction within a specified distance range.

[0161] According to one embodiment, the first holder may include a first body portion (111), a first receiving portion (114), or a first tapered surface (118). The first receiving portion (114) may be formed on the inside of the first body portion. The first tapered surface (118) may be formed on the inner surface of the first body portion. The second holder may include a second body portion (121), a head portion (124), or a second tapered surface (125). The second body portion (121) may be at least partially disposed on the inside of the first body portion. The head portion (124) may be formed on one end of the second body portion. The head portion (124) may be configured to be movable in the first direction within the first receiving portion. The second tapered surface (125) may be formed on the outer surface of the second body portion. The second tapered surface (125) can be configured to contact the first tapered surface.

[0162] According to one embodiment, the height of the first receiving portion in the first direction may be greater than the height of the head portion in the first direction.

[0163] In one embodiment, the specified distance range may be defined by a difference between the height of the first receiving portion and the height of the head portion.

[0164] According to one embodiment, the first holder may further include a recess (1141). The recess (1141) may be formed in the first receiving portion. The second holder may further include a protruding portion (1241). The protruding portion (1241) may be formed in the head portion. The protruding portion (1241) may be inserted into the recess.

[0165] In one embodiment, at least a portion of the second body portion may be accommodated within the first body portion. The remainder of the second body portion may be exposed to the outside of the first body portion.

[0166] According to one embodiment, the second holder may include an insertion portion (126). The insertion portion (126) may be formed inside the second body portion. The cutting tip may include a shank portion (131) or at least one cutting edge (132). The shank portion (131) may be inserted into the insertion portion. The at least one cutting edge (132) may be formed at one end of the shank portion.

[0167] In one embodiment, the elastic member may be disposed between the first body portion and the second body portion. The elastic member may be configured to pressurize the second body portion.

[0168] According to one embodiment, the second holder may be configured to be movable in a first-first direction away from the first holder, or in a first-second direction opposite to the first-first direction.

[0169] In one embodiment, while the second holder moves in the first-first direction, the elastic member can be tensioned. While the second holder moves in the first-second direction, the elastic member can be compressed.

[0170] According to one embodiment, the cutting device may further include a washer (141). The washer (141) may secure the elastic member to the first holder.

[0171] According to one embodiment, the cutting device may further include a fixing member (150). The fixing member (150) may fix the cutting tip to the second holder.

[0172] In one embodiment, the fixing member may include a collet portion (153), an inner cover (151), or an outer cover (152). The collet portion (153) may surround the cutting tip. The inner cover (151) may cover the collet portion. The outer cover (152) may cover the inner cover. The outer cover (152) may be fixed to the second holder.

[0173] In one embodiment, the fixing member may further include a pressure member (155). The pressure member (155) may be positioned to penetrate the outer cover. The pressure member (155) may be configured to pressure the collet portion.

[0174] According to one embodiment, the fixing member may further include a fastening member (154). The fastening member (154) may be positioned to penetrate the outer cover. The fastening member (154) may be coupled to the inner cover.

[0175] According to one embodiment of the present disclosure, the outer cover (280) may include a first surface (281), a second surface (282), and / or a pattern structure (283). The second surface (282) may face opposite to the first surface. The pattern structure (283) may be formed on the first surface. The pattern structure may include at least one recess (283a). The depth of the at least one recess may be 2.7 um to 5.5 um (micrometer).

[0176] According to one embodiment, the width of the at least one recess may be from 9 um to 11 um.

[0177] According to one embodiment, the inclination angle of the at least one recess may be from 4 degrees to 5 degrees.

[0178] According to one embodiment, the thickness from the first surface to the second surface may be 3.3 mm or less. The step of the at least one recess may be provided to be 5.5 um or less.

[0179] According to one embodiment, the at least one recess may include a plurality of recesses (283b, 283c, 283d, 283e). The plurality of recesses (283b, 283c, 283d, 283e) may have different widths, different depths, and different inclination angles.

[0180] Although the detailed description of this document has described specific embodiments, it will be apparent to those skilled in the art that various modifications are possible without departing from the scope of this document.

Claims

1. In the cutting device (100), A first holder (110) configured to be rotatable; A second holder (120) disposed at least partially inside the first holder; A cutting tip (130) fixed to the second holder; and Including an elastic member (140) arranged between the first holder and the second holder, A cutting device wherein the second holder is configured to move relatively to the first holder in a first direction within a specified distance range.

2. In paragraph 1, The above first holder, First body part (111); A first receiving portion (114) formed inside the first body portion; and Including a first tapered surface (118) formed on the inner surface of the first body portion, The second holder above, A second body part (121) at least partially disposed inside the first body part; A head portion (124) formed at one end of the second body portion, the head portion configured to be movable in the first direction within the first receiving portion; and A cutting device including a second tapered surface (125) formed on an outer surface of the second body portion, the second tapered surface configured to contact the first tapered surface.

3. In any one of paragraphs 1 to 2, A cutting device in which the height of the first receiving portion in the first direction is greater than the height of the head portion in the first direction.

4. In any one of paragraphs 1 to 3, A cutting device in which the above-mentioned specified distance range is defined by the difference between the height of the first receiving portion and the height of the head portion.

5. In any one of paragraphs 1 to 4, The above first holder, Further comprising a recess (1141) formed in the first receiving portion, The above second holder, A cutting device further comprising a protruding portion (1241) formed on the head portion and inserted into the recess.

6. In any one of paragraphs 1 to 5, At least a portion of the second body portion is accommodated within the first body portion, The remainder of the second body part is a cutting device exposed to the outside of the first body part.

7. In any one of paragraphs 1 to 6, The above second holder, Including an insertion portion (126) formed inside the second body portion, The above cutting tip is, A shank portion (131) inserted into the above insertion portion; and A cutting device comprising at least one cutting edge (132) formed on one end of the shank portion.

8. In any one of paragraphs 1 to 7, The above elastic member is, A cutting device disposed between the first body portion and the second body portion and configured to pressurize the second body portion.

9. In any one of paragraphs 1 to 8, The above second holder, A cutting device configured to be movable in a first direction away from the first holder and in a first direction opposite to the first direction.

10. In any one of paragraphs 1 to 9, While the second holder moves in the first-first direction, the elastic member is tensioned, A cutting device in which the elastic member is compressed while the second holder moves in the first-second direction.

11. In any one of paragraphs 1 to 10, A cutting device further comprising a washer (141) for securing the elastic member to the first holder.

12. In any one of paragraphs 1 to 11, A cutting device further comprising a fixing member (150) for fixing the cutting tip to the second holder.

13. In any one of paragraphs 1 to 12, The above fixed member is, A collet portion (153) surrounding the above cutting tip; Inner cover (151) covering the above collet portion; and A cutting device comprising an outer cover (152) covering the inner cover and fixed to the second holder.

14. In any one of paragraphs 1 to 13, The above fixed member is, A cutting device further comprising a pressing member (155) arranged to penetrate the outer cover and configured to pressurize the collet portion.

15. In any one of paragraphs 1 to 14, The above fixed member is, A cutting device further comprising a fastening member (154) disposed through the outer cover and coupled to the inner cover.

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