Connecting member, arm, watch buckle, watchband, watch, and method for manufacturing watch buckle

Abstract

The invention relates to a connecting part, an arm, a watch buckle, a watchband, a watch and a manufacturing method of the watch buckle. The connection member has a hole into which a shaft provided on the member is inserted, the connection member is formed of a resin material and fiber layers containing a carbon fiber material, and at least a part of the periphery of the hole is covered by a plurality of the fiber layers.

Description

Technical Field

[0001] The invention relates to a connecting component, an arm, a clasp, a watch band, a watch and a method for manufacturing the clasp. Background Art

[0002] Japanese Patent Publication No. 2014-30522 describes that a watch band provided on a watch is composed of a structure in which a plurality of watch band links are connected, and the plurality of watch band links are formed of a material composed of stacked carbon sheets. A clasp is connected to the ends of the plurality of watch band links, and the length is configured to be adjustable by opening and closing the clasp. The clasp includes a cover portion having a recess and a plurality of arms connected rotatably, and the plurality of arms are configured to be adjustable in length by folding or unfolding.

[0003] However, there are the following problems: since the arm is a thin and slender component, and a hole must be formed for the pins connecting to the arms or the cover to pass through, it is difficult to ensure strength. On the other hand, since a large load is applied during opening and closing, a higher strength is required, which is difficult to form with fiber-reinforced resin.

[0004] The present invention is an invention for improving and solving the problems in such a situation, and can realize high strength. Summary of the invention

[0005] A connecting component according to one embodiment of the present invention has a hole provided in the component and into which a shaft is inserted. The connecting component is formed of a fiber layer containing a carbon fiber material and a resin material, and at least a portion of the periphery of the hole is covered with a plurality of the fiber layers.

[0006] An arm according to another aspect of the present invention has a hole provided in a cover portion for inserting a shaft, and is formed of a fiber layer containing a carbon fiber material and a resin material, and at least a portion of the periphery of the hole is covered by a plurality of the fiber layers.

[0007] Another embodiment of the clasp of the present invention comprises a cover portion, a shaft arranged on the cover portion, and an arm formed by a fiber layer containing a carbon fiber material and a resin material and having a hole for inserting the shaft, wherein at least a portion of the arm around the hole is covered by a plurality of the fiber layers.

[0008] Another type of watch strap of the present invention comprises the above-mentioned buckle and multiple watch strap parts having multiple watch strap links, the connecting part having the arm comprises a first arm and a second arm as the multiple arms, the cover part has the holes formed at both ends in the first direction, is connected to one watch strap part via an axis arranged in one of the holes, and is connected to the first arm via an axis arranged in the other hole, the first arm has the holes at both ends in the first direction, is connected to the cover part via an axis arranged in one of the holes, and is connected to the second arm via an axis arranged in the other hole, one of the holes at both ends of the first direction of the second arm is connected to the first arm, and is connected to the other watch strap part via an axis arranged in the other hole.

[0009] A watch according to another aspect of the present invention includes the watch band, a watch case to which the watch band is attached, and a module arranged in a storage portion in the watch case.

[0010] Another embodiment of the buckle manufacturing method of the present invention includes: a first step of folding back and stacking multiple layers of prepreg sheets containing carbon fiber material; a second step of curing a stack of multiple layers of the prepreg sheets obtained by the first step; and a third step of forming a hole on the inner side of the folded back layer of the stack obtained by the second step. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a plan view showing the structure of the watch according to the first embodiment.

[0012] Figure 2 It is a cross-sectional view showing the structure of the table.

[0013] Figure 3 It is a top view showing the structure of the watch band of the watch.

[0014] Figure 4 It is a top view showing the structure of the watch band of the watch.

[0015] Figure 5 It is a top view showing the structure of the watch band of the watch.

[0016] Figure 6 It is a top view showing the structure of the watch band of the watch.

[0017] Figure 7 It is a top view showing the structure of the watch band of the watch.

[0018] Figure 8 It is a top view showing the structure of the watch band of the watch.

[0019] Fig. 9 This is an explanatory diagram showing a part of the clasp of the watch band of the watch.

[0020] Fig.10 It is a side view showing the arm of the clasp of the watch band of the watch.

[0021] Fig.11 It is an explanatory diagram showing a method for manufacturing the watch band of the watch.

[0022] Fig.12 It is an explanatory diagram showing a method for manufacturing the buckle of the watch band of the watch.

[0023] Fig.13 It is an explanatory diagram showing a method for manufacturing the buckle of the watch band of the watch. DETAILED DESCRIPTION

[0024] Below, refer to Figures 1 to 11 A watch 1 , a watch band 40 , and a buckle 50 (a member connecting the 12 o'clock side and the 6 o'clock side of the watch band 40 , also called a buckle, which is tightened or loosened when attaching or detaching the watch 1 ) according to a first embodiment of the present invention will be described. Figure 1 is a top view showing the structure of the watch 1. Figure 2 It is a cross-sectional view showing the structure of the wristwatch 1. Figures 3 to 5 A top view, a side view, and a rear view from the back side of the watch band in a folded state are respectively shown. Figures 6 to 8 A top view, a side view, and a rear view from the back side of the watch band in the unfolded state are respectively shown. Fig. 9 It is an explanatory diagram showing a partial structure of the watch band 40. Fig.10 It is a side view showing the arm. Fig.11 and Fig.12 This is an explanatory diagram showing an example of a prepreg sheet used in the method for manufacturing a buckle. Fig.13 This is an explanatory diagram showing the structure of a base material in a method for manufacturing a buckle.

[0025] In addition, in each figure, the structure is appropriately enlarged, reduced, or omitted to be schematically represented. In this embodiment, for example, in the watch 1, the side facing the outer surface of the windshield component 30 formed of transparent glass or the like is the surface side, and the side facing the outer surface of the bottom cover portion constituting the bottom of the watch case 10 is the inner side. For example, the watch 1 is installed in a posture where the outer surface of the bottom cover portion is opposite to the arm of the wearer.

[0026] like Figure 1 As shown, the watch 1 comprises: a case 10 constituting an outer shell, a module 20 arranged in the case 10, a windproof component 30 covering the surface side of the module 20, and a strap 40 having a pair of strap components connected to two locations respectively opposite to the outer periphery of the case 10.

[0027] The watch case 10 is formed in a circular shape and includes a center case 11 disposed on the outer periphery of the module 20 , a bottom cover portion disposed on the inner side of the module 20 , and a bezel 13 disposed on the outer periphery of the center case 11 .

[0028] The case 10 is composed of a central case 11 and a bottom cover, which constitute a storage portion in which the module 20 can be placed. The opening on the front side of the central case 11 is covered by a windshield member 30 .

[0029] Figure 2 The central housing 11 shown is configured as a circular or polygonal frame. For example, the central housing 11 is formed of a fiber-reinforced resin or the like by, for example, injection molding. As an example, the central housing 11 is formed of a composite material PEEK carbon fiber in which carbon fibers are mixed in polyetheretherketone (PEEK). A storage portion for storing the watch module 20 or the like is formed inside the central housing 11. The central housing 11 may also be configured by combining a plurality of housing components.

[0030] The central housing 11 has a band mounting portion 16 for mounting the band components 41 and 42 at two locations on the outer periphery that are opposite to each other, for example, at 6 o'clock and 12 o'clock. For example, the band mounting portion 16 has a connection structure having a connection hole (hole) connected to the band components 41 and 42 by a connection member such as a screw, a pin, or a spring rod. In addition, the band mounting portion 16 may be integrally formed with the case 10 or may be separately formed from the case 10 and assembled on the case 10.

[0031] The bezel 13 is provided on the outer periphery of the center housing 11. The bezel 13 is fixed to the center housing 11 by a connection portion such as a screw. The bezel 13 is made of forged carbon, which is a carbon reinforced resin material formed by hot pressing, by mixing short carbon fibers cut into short pieces into a resin material, for example. For example, since short carbon fibers are mixed, a so-called chopped pattern is formed.

[0032] Furthermore, a buffer member is provided between the center case 11 and the bezel 13 or on the outer periphery of the center case 11. For example, the buffer member is formed by injection molding of a carbon reinforced resin.

[0033] Furthermore, a decorative piece made of forged carbon is provided on the upper surface of the band attachment portion 16 of the central case 11 .

[0034] For example, the windshield member 30 is connected to the central housing 11 by screws via washers. The washers inside the screws are made of, for example, a resin material, and as an example, are made of carbon reinforced resin injection molding.

[0035] The module 20 includes a display unit that displays information such as time and date, a movement that operates the display unit, a circuit substrate equipped with electronic components such as an IC and an antenna, and various components required for the watch function such as a battery. For example, the display unit may be a digital display unit such as a liquid crystal display panel with a digital display function, or an analog display unit with a dial and pointers. In addition, a plurality of display units may be provided.

[0036] The windshield member 30 is a transparent member formed of inorganic glass such as SiO2 glass, for example. For example, the windshield member 30 is a transparent circular plate-shaped watch glass, which is arranged on the surface side of the module 20 and covers the module 20. For example, the windshield member 30 is supported on the inner periphery of the opening on the surface side of the central housing 11. A seal is sandwiched between the outer periphery of the windshield member 30 and the inner periphery of the central housing 11.

[0037] like Figure 1 and Figure 3 As shown, the strap 40 includes a first strap component 41 and a second strap component 42 connected to two opposite positions on the outer periphery of the watch case 10, and a buckle 50 as a connecting mechanism. For example, one end side of each strap component 41, 42 is connected to the watch case 10, and the other end sides are connected to each other through the buckle 50.

[0038] The strap components 41 and 42 are arranged along the length direction (first direction) of the strap 40. Fig. 9 As shown, each of the band components 41 and 42 includes a plurality of band links 44 rotatably connected to each other, a connecting pin 45, a buffer component 46, a link cover 47, and a fastening portion 48. In each of the band components 41 and 42, a plurality of band links 44 are rotatably connected by the connecting pin 45 and arranged in a row in a first direction. The width direction of the band 40 perpendicular to or intersecting the first direction is referred to as a second direction.

[0039] like Fig. 9 As shown, the plurality of strap links 44 have predetermined lengths in the first direction and the second direction, respectively. For example, the strap links 44 are formed into a curved surface whose outer surface is bent into an arcuate shape. For example, the strap links 44 are slowly bent along the periphery of the wrist when the strap 40 is worn. For example, the plurality of strap links 44 may have the same structure or may have partially different shapes. For example, the strap links 44 provided at the ends of each strap component 41, 42 are connected to the buckle 50 or the strap mounting portion 16, and the other strap links 44 of the strap components 41, 42 other than the ends are connected to other adjacent strap links 44.

[0040] The plurality of band links 44 have a connection structure connected to the adjacent band links 44, the buckle 50, or the band mounting portion 16. For example, the plurality of band links 44 have a first convex portion 44a protruding toward one end side at the center in the second direction of one end portion in the first direction, and have second convex portions 44b protruding toward the other end side at both ends in the second direction of the other end portion in the first direction. The first convex portion 44a and the second convex portion 44b are arranged at different positions in the second direction.

[0041] As an example, a plurality of band links 44 adjacent in the first direction have the convex portion 44a at the center of one end of another adjacent band link 44 arranged in the concave portion 44c between the second convex portions 44b formed at both ends on the other end.

[0042] The first convex portion 44a and the second convex portion 44b formed at one end and the other end, respectively, have a first pin hole 44d and a second pin hole 44e as holes. The pin holes 44d and 44e are through holes that penetrate the first convex portion 44a and the second convex portion 44b in the second direction, which is a width direction perpendicular to or intersecting the first direction. For example, the inner diameter of the first pin hole 44d of the first convex portion 44a at the center is configured to be smaller than the inner diameter of the second pin holes 44e of the second convex portions 44b at both ends.

[0043] Furthermore, a fastening hole 44f as a hole in which the fastening portion 48 is arranged is formed at a location between the first convex portion 44a and the second convex portion 44b of the band link 44. The fastening hole 44f is a through hole that penetrates the band link 44 in the second direction.

[0044] For example, in the plurality of band links 44 connected in the first direction, the first convex portion 44a and the second convex portion 44b of the other band links 44 connected in the first direction are arranged in the second direction. That is, in one of the adjacent pairs of band links 44 of the first band component 41 and the second band component 42, the first convex portion 44a of the other band link 44 is arranged in the recessed portion 44c formed between the pair of second convex portions 44b on both sides in the second direction. Therefore, the plurality of band links 44 connected in the first direction are arranged such that the second convex portion 44b of one band link and the first convex portion 44a of the other band link 44 are arranged in the second direction.

[0045] The first pin holes 44d of the first protrusions 44a of a pair of band links 44 and the second pin holes 44e of the pair of second protrusions 44b of the other band link 44 are continuous in the second direction. The pair of band links 44 are provided with connecting pins 45 passing through the continuous pin holes 44d and 44e, whereby the plurality of band links 44 are mutually connected rotatably around an axis along the width direction.

[0046] In addition, among the multiple strap links 44 provided in each strap component 41, 42, for example, in the strap link 44 arranged at the end in the first direction, the first protrusion 44a or the second protrusion 44b is connected to the strap mounting portion 16 or the buckle 50 through a connecting component arranged in the pin holes 44d, 44e.

[0047] The buffer component 46 is formed into a tubular shape by a soft rigid resin material having elasticity such as silicone rubber. The buffer component 46 is respectively provided at both ends of the plurality of band links 44 in the second direction. That is, the buffer component 46 is respectively sandwiched on the outer periphery of both ends of one connecting pin 45. The buffer component 46 is formed into a tubular shape having a cylindrical hole 46d along the axial direction. The buffer component 46 has a large diameter portion 46a arranged on one side in the axial direction and a small diameter portion 46b arranged on the other side, and a step portion 46c is formed between the large diameter portion 46a and the small diameter portion 46b. The axial direction of the buffer component 46 is arranged along the second direction of the band link 44, the large diameter portion 46a is arranged at the pin hole 44e of the second convex portion 44b on both sides, the small diameter portion 46b is arranged at the end of the pin hole 44d of the central convex portion 44a, and the step portion 46c is locked to the periphery of the pin hole 44d of the convex portion 44a. That is, the buffer member 46 is interposed between the first convex portion 44a and the second convex portion 44b of a pair of band links 44 adjacent to each other in the second direction, and regulates the positions of the first convex portion 44a and the second convex portion 44b.

[0048] The link covers 47 are respectively provided at both ends in the second direction of the band link 44 connected by inserting the connecting pin 45. The link covers 47 have a recessed countersunk portion 47a on which the connecting pin 45 and the buffer member 46 protruding from the band link 44 in the second direction are arranged, and cover the ends of the band link 44, the connecting pin 45, and the buffer member 46. In addition, the link covers 47 have steps 47c on the outer surfaces of both ends in the second direction for locking the head of the fastening portion 48, and have cover fastening holes 47b through which the shaft of the fastening portion 48 passes, and the link covers 47 at both ends clamp the band link 44 through the fastening portion 48 and fasten it.

[0049] The fastening portion 48 includes an external thread portion 48a disposed on one side of the second direction and an internal thread portion 48b disposed on the other side of the second direction. For example, the external thread portion 48a and the internal thread portion 48b each include a shaft portion extending in the second direction and forming a thread and a head portion provided at the end of the shaft portion. The shaft portion of the external thread portion 48a is screwed with the shaft portion of the internal thread portion 48b. The heads of the external thread portion 48a and the internal thread portion 48b of the fastening portion 48 are respectively stopped at the step 47c formed on the cover fastening hole 47b of the link cover 47, and the shaft portions are screwed with each other, thereby fastening a pair of link covers 47 provided to sandwich the watch band link 44.

[0050] like Figures 3 to 8As shown, the clasp 50 connects the ends of a pair of band members 41 and 42. For example, the clasp 50 includes a cover 51 connected to one band member 41 and an opening and closing member 52 (connecting member) connected to the cover 51 and the other band member 42.

[0051] The cover portion 51 includes a top portion 51 a and a pair of side wall portions 51 b that are erected from the side edges of the top portion 51 a in the thickness direction and form a housing recess 51 c that houses the opening and closing member 52 .

[0052] The top portion 51a is a rectangular plate having predetermined dimensions in the first direction (the length direction of the strap) and the second direction (the width direction of the strap), and is formed into a curved surface that is curved in an arch shape relative to the first direction at a predetermined curvature similar to the periphery of the wrist when the strap 40 is worn. An engaging hole portion 51d is formed on the back surface of the top portion 51a, that is, on the surface facing the opening and closing member 52 in the folded state. For example, the engaging hole portion 51d is a recess that fits with the engaging protrusion 52d provided on the opening and closing member 52 and holds the engaging protrusion 52d.

[0053] For example, the cover 51 forms a storage space on the back side of the top 51a between the pair of side walls 51b, 51b to store the folded opening and closing member 52. That is, the cover 51 covers the front side of the folded opening and closing member 52 through the top 51a.

[0054] The cover 51 has holes 51e and 51f at both ends in the first direction and is rotatably connected to one band member 41 via a pin member 55 disposed in the hole 51e. The cover 51 is also connected to a pair of first arms 53 via a pin member 55 (shaft) disposed in the other hole 51f.

[0055] The opening and closing member 52 has a plurality of arms 53 and 54 rotatably connected to each other. For example, the opening and closing member 52 has a pair of first arms 53 (first arm) and second arms 54 (second arm) rotatably connected to each other via a pin member 55 around an axis of the pin member 55 along the axial direction.

[0056] The first arms 53 are elongated members having predetermined dimensions in the first and second directions. For example, the first arms 53 are bent along the back surface of the top 51a with a predetermined curvature. The length of the first arms 53 in the first direction is shorter than that of the second arms 54.

[0057] The pair of first arms 53 have a width between them that allows the second arm 54 to be arranged in the folded state. That is, in the folded state, the second arm 54 is arranged between the pair of first arms 53, and the second arm 54 and the first arms 53, 53 are arranged side by side in the second direction, so that the opening and closing member 52 is accommodated in the accommodation recess 51c of the cover portion 51.

[0058] Holes 53a and 53b are formed at both ends of the first arm 53 in the first direction. The holes 53a and 53b are through holes extending in the second direction and through which the pin member 55 for connecting the first arm 53 to other members passes. For example, the first arm 53 is connected to the cover 51 via the pin member 55 disposed in one hole 53a, and is connected to the second arm 54 via the pin member disposed in the other hole 53b. An engaging protrusion 52d is formed on the outer surface of the curved side of the arm 53 to engage with the engaging hole 51d of the housing recess 51c.

[0059] The second arm 54 is an elongated member having predetermined dimensions in the first direction and the second direction and extending in the first direction. For example, the second arm 54 is bent along the back surface of the top 51a with a predetermined curvature. The length of the second arm 54 in the first direction is formed longer than that of the first arm 53.

[0060] The second arm 54 has a width that allows it to be disposed between the pair of first arms 53 in the folded state.

[0061] Holes 54a and 54b are formed at both ends in the first direction of the second arm 54. The holes 54a and 54b are through holes extending in the second direction and through which pin members 55 that connect the second arm 54 to other members pass. For example, the second arm 54 is connected to the pair of first arms 53 via the pin member 55 disposed in one hole 54a, and is connected to the band link 44 at the end of the second band member 42 via the pin member 55 disposed in the other hole 54b.

[0062] The plurality of arms 53 and 54 of the opening and closing member 52 are rotatably connected to each other by the pin member 55. That is, the opening and closing member 52 changes its state between the unfolded state and the folded state by changing the opening angle of the pin member 55 around the axis by the rotation of the plurality of arms 53 and 54. In the folded state, the opening and closing member 52 is arranged in the recessed portion 51c formed in the cover portion 51 and engaged.

[0063] Each arm 53, 54 is formed of a carbon fiber material 62 and a resin material 63. For example, the arms 53, 54 are formed of a plurality of fiber-reinforced resin materials having a fiber layer 61 formed of a carbon fiber material 62, that is, a laminated carbon component 60. For example, the laminated carbon component 60 constituting the arms 53, 54 has a plurality of prepreg sheets 64 in which a resin material 63 (resin material) is impregnated with a plurality of carbon fiber materials 62. For example, the prepreg sheets 64 are stacked in a plurality of layers in a stacking direction along the front and back direction when the band 40 is worn.

[0064] For example, the arms 53 and 54 are composed of a laminated carbon component 60 formed by laminating a plurality of prepreg sheets 64 formed by impregnating a resin material 63 such as epoxy resin in a fiber layer 61 containing a carbon fiber material 62 that is long in at least one direction. For example, the fiber layer 61 may be composed of a plurality of carbon fiber materials 62 that are long in one direction arranged in the same direction, or may be a sheet-like base material that is configured in a fabric-like manner by arranging carbon fiber materials 62 in two directions.

[0065] A plurality of fiber layers 61 are stacked in the stacking direction in at least a portion of the arms 53 and 54, for example, in the central region in the first direction, and each fiber layer 61 has a plurality of carbon fiber materials 62 extending at least in the first direction. In addition, in at least a portion around each of the holes 53a, 53b, 54a, 54b formed at both ends of the arms 53 and 54, the fiber layer 61 is bent along at least a portion of its outer periphery.

[0066] That is, in the arms 53, 54, the carbon fiber material 62 has a curled portion 62a that is folded back and bent around the end side of the arms 53, 54 in the outer peripheral portion of the holes 53a, 53b, 54a, 54b. That is, the carbon fiber material 62 constituting the fiber layer 61 and at least a part of the fiber layer 61 has the curled portion 62a that is folded back around the holes 53a, 53b, 54a, 54b, and extends from both side ends of the curled portion 62a to the center side of the arms 53, 54 closer to the holes 53a, 53b, 54a, 54b.

[0067] For example, in this embodiment, the prepreg sheet 64 having a plurality of carbon fiber materials 62 extending in at least one direction is wound around a pair of holes 53a, 53b, 54a, 54b multiple times, thereby being stacked in multiple layers in the central region. In addition, in the prepreg sheet 64, in the region closer to the end side than the holes 53a, 53b, 54a, 54b, the plurality of fiber layers 61 and the carbon fiber materials 62 are bent around the outside of the holes 53a, 53b, 54a, 54b, and in the central region in the first direction, the plurality of fiber layers 61 and the carbon fiber materials 62 extend in the first direction.

[0068] Therefore, the prepreg sheet 64 constituting the arms 53 and 54 has a portion arranged along the length direction and the width direction of the arms 53 and 54 and a bent portion wound around a pair of holes 53a, 53b, 54a, and 54b. In addition, the arms 53 and 54 may also contain carbon fiber materials 62 arranged along other directions. The carbon fiber material 62 may also include a fiber material whose length direction is arranged along a first direction and a fiber material whose length direction is arranged along a second direction. That is, in the arms 53 and 54, the carbon fiber material 62 may also be arranged in two different directions. For example, in the arms 53 and 54, the layers of fibers along the first direction and the layers of fibers along the second direction are alternately overlapped, and the layers of fibers along the second direction are formed on the outermost side.

[0069] The clasp 50 constructed as described above is constructed so as to be able to switch between a tightened state and a released state by changing the connection length between the strap parts 41 and 42 according to the rotation state of the plurality of arms 53 and 54. That is, when the clasp 50 is in a folded state in which the plurality of arms 53 and 54 are folded and locked, the connection length between the strap parts 41 and 42 becomes smaller, thereby becoming a closed state capable of preventing the clasp 50 from being detached from the wrist as the wearer. At this time, the first arm 53 and the second arm 54 overlap when viewed from the second direction, and the bending directions become the same direction. In addition, the clasp 50 is unfolded by the plurality of arms 53 and 54, the connection length between the strap parts 41 and 42 of the opening and closing part 52 is extended, and becomes an open state capable of inserting and removing the wrist. At this time, the opening angles of the first arm 53 and the second arm 54 are large, and the bending directions are opposite.

[0070] The following is a description of a method for manufacturing the arms 53 and 54 of the clasp 50 in this embodiment. The method for manufacturing the arms 53 and 54 includes: a step of forming a plate-shaped base material 50A as a primary processed product before being divided into a plurality of arms 53 and 54; and a step of dividing the base material 50A into a plurality of arms. Fig.10 4 , a base material 50A of the arm 53 is illustrated.

[0071] The process of forming the substrate 50A as a primary processed product includes: a process of forming a laminated material (laminate) by folding back the prepreg sheet 64 at both ends of an area having a specified width and winding it multiple times (a first process); a process of curing the laminated material configured by overlapping multiple layers of the prepreg sheet 64 (a second process); and a process of forming a hole on the inner side of the folded portion of the prepreg sheet 64 in the cured laminated material (a third process).

[0072] The prepreg sheet 64 is a resin sheet containing the carbon fiber material 62. The prepreg sheet 64 is formed by arranging a plurality of carbon fiber materials 62 in the same direction and impregnating the carbon fiber materials 62 with a resin material 63 such as epoxy resin.

[0073] As an example, Fig.11 As shown in FIG. 1 , the laminated carbon component 60 (laminated material) may also be a structure in which a plurality of prepreg sheets 64 are stacked, each of which has its arrangement direction of the carbon fiber material 62 changed by 90 degrees. Fig.12As shown, the laminated carbon component 60 (laminated material) may also use a prepreg sheet 64 having carbon fiber materials 62 arranged in multiple directions. For example, the laminated carbon component 60 (laminated material) can alternately arrange the directions of the fibers by winding multiple times in a state where two prepreg sheets 64 with carbon fiber materials 62 in a perpendicular direction are stacked. In addition, the laminated carbon component 60 (laminated material) is formed by winding a prepreg sheet 64 having fibers extending in the second direction (short side direction, direction of the first strap component 41 or the second strap component 42) perpendicular to the first direction in the fiber layer on the front side or the back side of the lamination direction. In this way, since the fiber layer on the front side or the back side of the lamination direction of the laminated carbon component 60 (laminated material) is fibers extending in the second direction which is the short side direction of the first arm 53 or the second arm 54, the cross-section of multiple fibers is not visible on the cut surface, which can improve the design of the appearance.

[0074] In addition, the laminated carbon component 60 (laminated material) may be laminated by winding a resin sheet in a region including a core material containing a resin material in the process of laminating the prepreg sheet 64. As an example, the laminated carbon component 60 (laminated material) may be preliminarily provided with a pair of pin-shaped core materials at positions corresponding to the holes at both ends, and the prepreg sheet 64 may be wound so as to pass through the pair of core materials outside in the first direction.

[0075] In the laminated material having a plurality of prepreg sheets 64 stacked thereon, since the carbon fiber material 62 is arranged in the first direction in at least a portion of the prepreg sheets 64, a portion of the fibers 62 in the laminated material is wound around the holes 53a, 53b, 54a, 54b.

[0076] Then, the laminated material in which the plurality of prepreg sheets 64 are laminated is placed in a predetermined mold corresponding to the base material 50A and cured by heating and pressurizing, thereby forming the base material 50A.

[0077] Then, the substrate 50A is cut and divided into predetermined widths, and holes 53a, 53b, 54a, and 54b are formed on the inner side of the folded portion. In addition, in the lamination process, for example, in the case of configuring a core material, a hole is formed at the position of the core material in the process of forming a hole. In the case of configuring a pair of pin-shaped core materials at positions corresponding to the holes, a hole is formed at the position of the core material. In addition, in the case of configuring a flat core material, holes are formed at predetermined positions at both ends of the first direction of the core material.

[0078] According to the clasp 50, the band 40 and the watch 1 constructed as described above, the strength of the clasp 50 is easily ensured by having an opening and closing part 52 composed of a fiber-reinforced resin having a fiber material 62 around the hole, that is, a laminated carbon part 60. That is, in a thin-walled or narrow-width part where it is relatively difficult to ensure strength, by arranging the fiber material 62 of the laminated carbon part 60 around the hole, it is possible to ensure practical strength for the part that applies force in particular, and it is also possible to improve the tensile strength in the hole. Therefore, in a structure in which a plurality of prepreg sheets 64 are stacked, damage caused by interlayer peeling can be suppressed. For example, the bending strength of the arms 53 and 54 made of forged carbon is about 10 kgf, while the arms 53 and 54 made of the laminated carbon part 60 can increase the bending strength to about 60 kgf, thereby improving the strength. Therefore, in the watch 1, for example, a full carbon structure in which the main parts such as the case 10, the bezel 13, and the band 40 are all formed of carbon materials can be realized.

[0079] As shown in the present application, in the case where carbon is used for the first arm 53 and the second arm 54, in order to ensure strength, the thickness needs to be thicker than when metal is used. Strength can be ensured by stacking prepreg sheets 64 in which the carbon fiber material 62 is impregnated with the resin material 63. However, the first arm 53 and the second arm 54 need to form holes 53a, 53b, 54a, 54b for connecting each other and for the pin 55 (shaft) for connecting the cover part 51 to pass through. When the holes 53a, 53b, 54a, 54b are opened on the stacked prepreg sheets 64, the prepreg sheets 64 with the cross sections cut facing the holes 53a, 53b, 54a, 54b will crack in the transverse direction when stretched, and the strength cannot be ensured. Therefore, by winding the stacked prepreg sheets 64 around the holes 53a, 53b, 54a, 54b, it is possible to avoid making the cut surface, so that the strength can be ensured.

[0080] Furthermore, in the above-described embodiment, by configuring the band 40 to include the fiber material 62 extending in the first direction which is the length direction and the fiber material 62 extending in the second direction which is the width direction, higher strength can be achieved.

[0081] In addition, in the watch involved in the above-mentioned embodiment, for example, by making the other parts constituting the watch 1 respectively of forged carbon, polyamide (Diamid), etc., it is possible to make the appearance uniform while maintaining the characteristics of each part. That is, the parts injection-molded with PEEK carbon have good waterproofness, are easy to ensure strength, and can achieve uniform strength. In addition, the freedom of shape is also high. On the other hand, by using forged carbon on the bezel, the design can be improved. In addition, the buffer body and the gasket are formed by injection molding with carbon reinforced resin, which can ensure the freedom of shape and uniformity of strength.

[0082] In addition, the above-mentioned embodiment is an example and does not limit the scope of the invention.

[0083] The laminated carbon may be formed by sandwiching a colored glass fiber sheet between the laminated carbon layers.

[0084] Although an example of configuring a core material is shown, a core material may not be configured. Alternatively, a plate-shaped core material connected as one body may be configured instead of a pair of pin-shaped core materials. In this case, holes are formed at predetermined locations at both ends of the first direction of the plate-shaped core material.

[0085] In addition, in this embodiment, an example of an arm of a watch is shown, but the structure is not limited to this. A connecting component has a hole provided on the component for inserting a shaft, the connecting component is formed of a fiber layer containing a carbon fiber material and a resin material, and at least a portion of the periphery of the hole is covered by a plurality of fiber layers. For example, it can be used for a hinge of a notebook computer, a hinge of a foldable mobile phone, a clip, etc.

[0086] Although some embodiments of the present invention have been described, the present invention is included in the invention described in the claims and the scope of equivalents thereof.

Claims

1. A connecting component having a hole into which a shaft provided on the component is inserted, characterized in that: The hole is formed of fiber layers containing a carbon fiber material and a resin material, and at least a portion of the periphery of the hole is covered by a plurality of the fiber layers.

2. An arm having a hole into which a shaft provided on a cover is inserted, characterized in that: The hole is formed of fiber layers containing a carbon fiber material and a resin material, and at least a portion of the periphery of the hole is covered by a plurality of the fiber layers.

3. A watch buckle, characterized in that: have: Hood; a shaft disposed on the cover portion; and an arm, which is formed of a fiber layer containing a carbon fiber material and a resin material and has a hole into which the shaft is inserted, At least a portion of the arm around the hole is covered by a plurality of the fiber layers.

4. The buckle according to claim 3, characterized in that: A plurality of prepreg sheets in which the carbon fiber material is impregnated with the resin material are stacked on the arm. The carbon fiber material has a curled portion that surrounds the hole and is folded back on the end side of the arm, and both ends of the curled portion of the carbon fiber material extend toward the center side of the arm of the hole.

5. The buckle according to claim 3, characterized in that: The arm is formed with the hole on the end side of the first direction which is the length direction of the arm, and in the central part closer to the first direction than the hole, the carbon fiber material has fiber material arranged along the first direction and fiber material arranged along a second direction intersecting the first direction, and in the outermost layer in the stacking direction intersecting the first direction and the second direction of the arm, the carbon fiber material is arranged along the second direction.

6. The buckle according to claim 3, characterized in that: The cover has a recessed portion on the back side. The connecting component having the arms has a plurality of arms rotatably connected to each other via an axis passing through the hole, and changes its state between an expanded state and a folded state by rotation of the plurality of arms, and is arranged in a recess formed in the cover portion in the folded state.

7. A watch strap, characterized in that: have: The buckle according to any one of claims 3 to 6; and a plurality of strap components having a plurality of strap links, The connecting member having the arm includes a first arm and a second arm as the plurality of arms. The cover portion has the holes formed at both ends in the first direction, is connected to one of the strap components via a shaft arranged on one of the holes, and is connected to the first arm via a shaft arranged on the other of the holes. The first arm has the holes at both ends in the first direction, is connected to the cover via a shaft arranged on one of the holes, and is connected to the second arm via a shaft arranged on the other of the holes. One of the holes at both ends of the second arm in the first direction is connected to the first arm, and is connected to the other band component via a shaft arranged in the other hole.

8. A table, characterized in that have: The watch strap as claimed in claim 7; a watch case to which the watch band is mounted; and A module is arranged in a storage portion within the watch case.

9. A method for manufacturing a watch buckle, characterized in that: include: A first step is to fold back and stack a plurality of prepreg sheets containing carbon fiber material; A second step of curing a laminate of a plurality of prepreg sheets obtained in the first step; as well as A third step is to form a hole inside the folded portion of the laminate obtained in the second step.

10. The method for manufacturing a watch buckle according to claim 9, characterized in that: The first step includes winding and stacking the prepreg sheets in a region including a core material containing a resin material. The third step includes a step of forming the hole at a location where the core material is arranged.

11. The method for manufacturing a watch buckle according to claim 9 or 10, characterized in that: Prior to the first step, the carbon fiber material is impregnated with a resin material to obtain the prepreg sheet.

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