Fastener for ornaments, assembly set of fasteners for ornaments, and ornament

Abstract

The fastener 1 for jewelry, which connects a first target member and a second target member, includes a rotatably connected first member 10 and second member 20, and an attachment portion 30 attached to the first target member. The hook portion 12 of the first member 10 is hooked onto an opening of the second target member. The recess 13 of the hook portion 12 is recessed in the X2 direction, away from the attachment portion 30. The tip portion 23 of the second member 20 moves on an arc-shaped path 3 relative to the first member 10 by rotating the first member 10 and the second member 20. The path 3 passes through an imaginary reference circle 5 in the closed state. The reference circle 5 has a center 6 spaced in the X2 direction from the innermost portion 14 of the recess 13 in the X2 direction, is located on a plane parallel to the rotation axis AX and the X2 direction, and is a circle tangent to the hook portion 12 from the inside. In the closed state, at least a portion of the tip portion 23 passes through the reference circle 5.

Description

Technical Field

[0001] The present disclosure relates to a jewelry fastener, an assembly set of jewelry fasteners, and jewelry.

Background Art

[0002] For fasteners (also called clasps) used for connecting chains in jewelry such as necklaces, various types are known, such as a pull-ring type, an insertion type, a screw type, and a middle-fold type. For example, the pull-ring type fastener described in Japanese Patent Application Laid-Open No. 2008-36244 (Patent Document 1), the insertion type and screw type fasteners described in Japanese Patent Application Laid-Open No. 10-137016 (Patent Document 2), Japanese Patent Application Laid-Open No. 2012-19946 (Patent Document 3), etc. are known. Further, as other types of fasteners, for example, the middle-fold type fastener 150 shown in FIG. 15 and the type of fastener described in Japanese Patent Application Laid-Open No. 2000-166625 (Patent Document 4) are known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, these conventional fasteners are difficult to perform connection and separation operations. For example, in the case of a pull-ring type fastener, it is necessary to fix the main body when sliding a lever biased by a spring or the like, and it is not easy to simply perform the fixing of the main body and the sliding of the lever with one hand. Also, for insertion type fasteners and screw type fasteners, it is necessary to fix the main body when performing their respective operations (insertion and removal operation, screwing operation), and it is difficult to operate with one hand.

[0005] Also, in the case of the folding type fastener 150 shown in FIG. 15, when connecting the first member 151 and the second member 152, it is necessary to pass the ring portion 151a of the first member 151 through the entire movable side main body portion 152b and move it to the vicinity of the support portion 152a. However, the tip of the movable side main body portion 152b is bent. Also, a protruding piece portion 152c is formed so as to protrude from the movable side main body portion 152b in order to facilitate the rotation operation of the movable side main body portion 152b. For this reason, due to the interference between the ring portion 151a and the long movable side main body portion 152b or the protruding piece portion 152c of the second member 152, the movement of the ring portion 151a to the support portion 152a is likely to be hindered.

[0006] Therefore, an object of the present disclosure is to provide a fastener for ornaments, an assembly set of fasteners for ornaments, and an ornament provided with a fastener for ornaments that can easily perform connection and separation operations.

Means for Solving the Problems

[0007] A first aspect of the present disclosure is an ornament fastener for detachably connecting a first target member and a second target member, comprising a first member and a second member, an attachment portion attached to the first target member, a connecting portion rotatably connecting the first member and the second member, and a biasing member. The attachment portion is provided on the first member or the connecting portion. The first member includes a hooking portion that is hooked on an opening of the second target member. The hooking portion has a recess recessed in a first direction away from the attachment portion. The first member and the second member are in an open state or a closed state by rotating at the connecting portion. In the open state, a gap is formed between the first member and the second member. The gap in the open state forms a passage for the edge portion facing the opening of the second target member to enter and exit the recess of the hooking portion. In the closed state, the edge portion cannot enter and exit the recess through the gap. The second member includes a tip portion that moves on an arc orbit with respect to the first member by rotating the first member and the second member. The arc orbit is an orbit that passes through a virtual reference circle in the closed state. The reference circle has a center at a position away from the deepest part of the recess in the first direction in the first direction, is located on a plane parallel to the rotation axis of the first member and the second member and the first direction, and is a circle in contact with the hooking portion. In the closed state, at least a part of the tip portion penetrates the reference circle. The tip portion is located at a position away from the recess in the first direction within the reference circle when in the closed state. The biasing member generates a biasing force for rotating the first member and the second member in a direction of changing from the open state to the closed state. The first member and the second member in the open state automatically change to the closed state by the biasing force of the biasing member. The process of the first member and the second member changing to the closed state or the open state and the closed state is an ornament fastener in which the tip portion penetrating the reference circle is not locked by the hooking portion.

[0008] A second aspect of the present disclosure is the first member, the second member, and the attachment portion provided on the first member in the ornament fastener of the first aspect , the biasing member andIt is an assembly set of fasteners for ornaments, which includes

[0009] The third aspect of the present disclosure is an ornament including the fastener for ornaments of the first aspect.

Advantages of the Invention

[0010] According to the present disclosure, it is possible to provide a fastener for ornaments, an assembly set of fasteners for ornaments, and an ornament including the fastener for ornaments, which can easily perform connection operations and separation operations.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Mode for Carrying Out the Invention

[0012] <First Embodiment> FIG. 1 is a view showing an example of the fastener 1 for ornaments according to the first embodiment. The fastener 1 for ornaments according to the present embodiment is a fastener used for detachably connecting members in ornaments such as necklaces. The example of FIG. 1 shows a state in which one end portion 51 and the other end portion 52 of the linear member 50 are connected by the fastener 1 for ornaments. The linear member 50 shown in FIG. 1 has a plurality of frame portions 57 and a connecting member 58 that connects two adjacent frame portions 57. The connecting member 58 is swingably attached to the frame portion 57. Although not shown in FIG. 1, for example, a gemstone (such as a diamond) is fixed to each frame portion 57. Note that the fastener 1 for ornaments is not limited to linear members such as necklaces and bracelets as shown in FIG. 1, and can be used for connecting members in various ornaments.

[0013] Of the two members to which the fastener 1 for ornaments according to the present embodiment is connected, one member is referred to as the "first target member", and the other member is referred to as the "second target member". The first target member is pre-attached to the fastener 1 for ornaments so as not to be separated by the operation of the fastener 1 for ornaments. The second target member is connected to the fastener 1 for ornaments so as to be separable by the operation of the fastener 1 for ornaments. The first target member and the second target member may be independent and different members, or different portions of the same member. In the example of FIG. 1, one end portion 51 of the linear member 50 is the first target member, and the other end portion 52 of the linear member 50 is the second target member, and the end portion 51 and the end portion 52 are different portions of the same linear member 50.

[0014] In this specification, in order to describe the relative positional relationship of each part in the structure shown in the drawings, three orthogonal direction axes (X-axis, Y-axis, Z-axis) are defined. The direction parallel to the X-axis is called the "X direction", and the two opposite directions in the X direction are called the X1 direction and the X2 direction. The direction parallel to the Y-axis is called the "Y direction", and the two opposite directions in the Y direction are called the Y1 direction and the Y2 direction. Also, the direction parallel to the Z-axis is called the "Z direction", and the two opposite directions in the Z direction are called the Z1 direction and the Z2 direction. These directions are only given for convenience of explanation and do not define the directions when using the fastener for ornaments shown in the drawings.

[0015] Also, in this specification, unless otherwise specified, the directions of each part of the fastener for ornaments are described assuming that the fastener for ornaments is in the closed state.

[0016] Figures 2A - 2B, 3A - 3B, 4A - 4B, and 5A - 5B are views of the jewelry fastener 1 shown in FIG. 1 from various directions. FIG. 2A is a perspective view of the jewelry fastener 1 in the closed state, and FIG. 2B is a perspective view of the jewelry fastener 1 in the open state. FIG. 3A is a side view of the jewelry fastener 1 in the closed state, and FIG. 3B is a side view of the jewelry fastener 1 in the open state. FIG. 4A is a front view of the jewelry fastener 1, and FIG. 4B is a rear view of the jewelry fastener 1. FIG. 5A is a plan view of the jewelry fastener 1, and FIG. 5B is a bottom view of the jewelry fastener 1. FIG. 6A is a cross-sectional view of the jewelry fastener 1 taken along line A - A of the plan view of FIG. 5A. FIG. 6B is an end view of the cut portion when the jewelry fastener 1 is cut along line B - B of the side view of FIG. 3A.

[0017] As shown in FIGS. 3B and 6A, etc., the jewelry fastener 1 has a first member 10, a second member 20, an attachment portion 30 attached to the first target member, and a connecting portion 40. The connecting portion 40 (FIG. 6A) rotatably connects the first member 10 and the second member 20. The jewelry fastener 1 assumes an open state or a closed state as shown in the perspective views of FIGS. 2A and 2B when the first member 10 and the second member 20 rotate at the connecting portion 40. The rotation axis AX of the first member 10 and the second member 20 is parallel to the Y direction as shown in FIGS. 5A and 5B.

[0018] As shown in FIGS. 3B and 6A, etc., the attachment portion 30 is provided integrally with the first member 10. In the example of FIG. 1, the attachment portion 30 is fixed to a connecting member 58 that constitutes one end 51 of a linear member 50. As shown in FIG. 6A, the attachment portion 30 has a hole 31 extending in the X direction. With the connecting member 58 (one end 51) inserted into this hole 31, fixing means such as brazing, welding, or an adhesive is applied, whereby the attachment portion 30 is fixed to the connecting member 58 (one end 51). The attachment portion 30 may be a member independent of the first member 10.

[0019] Note that the means for attaching the attachment portion 30 to the first target member is not limited to fixing means such as brazing as described above. For example, the tip of the connecting member 58 passing through the hole 31 may be processed so as not to come out of the hole 31. Alternatively, the rod-shaped connecting member 58 may be replaced with a ring-shaped member and passed through the hole 31. That is, the attachment portion 30 and the first target member can be attached by various means that are difficult to easily come off during normal use.

[0020] As shown in FIGS. 3B and 6A, etc., the first member 10 has a hook portion 12. The hook portion 12 is hooked on the opening portion of the second target member. FIG. 7 is a view showing a state where the jewelry fastener 1 according to the first embodiment is hooked on one end of a linear member and suspended. In this FIG. 7 and the example of FIG. 1, the hook portion 12 is hooked on the opening portion 55 of the ring 53 constituting the other end portion 52 of the linear member 50.

[0021] As shown in FIGS. 3B and 6A, etc., the attachment portion 30 is located in the X1 direction when viewed from the hook portion 12. The hook portion 12 has a recessed portion 13 recessed in the direction away from the attachment portion 30 (also referred to as the first direction). The direction away from the attachment portion 30 is the X2 direction. The recessed portion 13 is recessed in this X2 direction. The X2 direction in which the recessed portion 13 is recessed is perpendicular to the rotation axis AX (Y direction parallel to the rotation axis AX). The recessed portion 13 is, for example, as shown in FIGS. 3B and 6A, etc., the edge or surface of the hook portion 12 facing the attachment portion 30 when viewed from the Y direction.

[0022] Since the recess 13 is recessed in the direction (X2 direction) away from the attachment portion 30, when the hook portion 12 is hooked on the opening 55 of the ring 53 (the other end portion 52 of the linear member 50) and suspended, as shown in FIG. 7, the recessed direction (X2 direction) of the recess 13 tends to face upward in the vertical direction. That is, when the weight of the first target member attached to the attachment portion 30 is applied to the first member 10, the attachment portion 30 tends to be located below in the vertical direction as viewed from the contact point between the edge portion 56 of the ring 53 and the recess 13, and the recessed direction of the recess 13 tends to face upward in the vertical direction as viewed from this contact point. As a result, the contact point easily shifts toward the innermost part of the recess 13, and the hook portion 12 is stably hooked on the ring 53.

[0023] As shown in FIGS. 3B and 7, the hook portion 12 has an end portion 121 that is inserted into an opening (in the example of FIG. 7, the opening 55 of the ring 53 that constitutes the other end portion 52 of the linear member 50) of the second target member. As shown in FIGS. 3B and 6A, the hook portion 12 is bent toward the second member 20 side as it approaches the end portion 121 when viewed from the Y direction parallel to the rotation axis AX. That is, when viewed from the Y direction, the hook portion 12 is bent toward the Z1 side as it approaches the end portion 121 with respect to the X direction. The shape of the hook portion 12 when viewed from the Y direction is curved such that the extending direction continuously changes in the order of the X2 direction, Z1 direction, and X1 direction from the first base portion 11 side described later.

[0024] As shown in FIGS. 3A and 6A, in the closed state, the rotation of the second member 20 with respect to the first member 10 is restricted by the contact of the hook portion 12 of the first member 10 with the second member 20.

[0025] As shown in FIGS. 3B and 6A, the first member 10 has a first base portion 11 connected to the hook portion 12. The first base portion 11 extends in the direction along the X direction as a whole, the attachment portion 30 is provided at the X1 side end of the first base portion 11, and the hook portion 12 is provided at the X2 side end of the first base portion 11. The first base portion 11 has a bottom surface 18 extending in the X direction when viewed from the Y direction parallel to the rotation axis AX. The bottom surface 18 is the surface on the Z2 side of the first base portion 11 and forms a plane substantially perpendicular to the Z direction.

[0026] The inner surface 101 on the Z1 side of the first base portion 11 facing the second member 20 is continuously connected to the concave portion 13 of the engaging portion 12 at the end on the X2 side as shown in FIG. 6A. The concave portion 13 is curved in an arc shape between one end connected to the first base portion 11 and the other end away from the first base portion 11 and facing the second member 20 side (Z1 side) when viewed in the Y direction parallel to the rotation axis AX. The inner surface 101 of the first base portion 11 extends in the X1 direction from one end of the curved concave portion 13 and forms a plane substantially perpendicular to the Z direction. The first base portion 11 is located on the X1 side (mounting portion 30 side) compared to the inner surface 101 and has an inner surface 103 located on the Z1 side compared to the inner surface 101. The inner surface 103 also forms a plane substantially perpendicular to the Z direction. The thickness of the first base portion 11 in the Z direction is larger in the portion of the inner surface 103 than in the portion of the inner surface 101. The inner surface 102 between the inner surface 101 and the inner surface 103 in the X direction is inclined in the Z1 direction as it goes toward the X1 side as shown in FIG. 6A. The thickness of the first base portion 11 in the Z direction continuously increases from the X2 side to the X1 side in the portion of the inclined inner surface 102.

[0027] As shown in FIGS. 4B and 6A, the first base portion 11 has two side walls 19 facing each other and separated in the Y direction on the further X1 side (mounting portion 30 side) of the inner surface 103. The thickness of the first base portion 11 in the Z direction is smaller than that of the inner surface 103 between the portions where the two side walls 19 are formed. The surface on the Z1 side of the side wall 19 projects in the Z1 direction and is curved in an arc shape as shown in FIG. 6A. The shapes of the two side walls 19 are substantially symmetric with respect to the plane (Z-X plane) perpendicular to the rotation axis AX.

[0028] As shown in FIG. 6A, the connecting portion 40 includes two shaft support holes 42 penetrating the two side walls 19 in the Y direction respectively, and a shaft 41 supported by the two shaft support holes 42. Both ends of the shaft 41 in the Y direction are fixed to side walls 25 of the second member 20 described later. The shaft 41 is fixed to the side wall 25 by caulking, for example. Note that the method of fixing the shaft 41 to the side wall 25 may be a method other than caulking.

[0029] The fastener 1 for ornaments has a torsion coil spring 60 as a biasing member that generates a biasing force for rotating the first member 10 and the second member 20 in a direction from an open state to a closed state. As shown in FIG. 6A, the torsion coil spring 60 is housed in the internal space of the fastener 1 for ornaments sandwiched by two side walls 19. The torsion coil spring 60 has a coil portion 61 wound in a spiral shape, and the shaft 41 is inserted through the hole at the center of the coil portion 61. The torsion coil spring 60 also has two arm portions 62 and 63 extending from both ends of the coil portion 61. One arm portion 63 abuts against the groove 28 on the Z2 side of the second base portion 21, and the other arm portion 63 abuts against the inner surface on the Z1 side of the first base portion 11 (the inner surface located between the two side walls 19). As viewed from the Y2 side as shown in FIG. 6A, one arm portion 63 biases the second member 20 in the counterclockwise direction, and the other arm portion 62 biases the first base portion 11 in the clockwise direction.

[0030] Note that the biasing member that biases the first member 10 and the second member 20 is not limited to the above-described torsion coil spring 60. For example, various elastic members such as a compression coil spring and a leaf spring may be used as the biasing member.

[0031] The width of the first member 10 in the Y direction is substantially equal over the entire length in the X direction as shown in the end view of the cut portion in FIG. 6B. The side surface on the Y1 side and the side surface on the Y2 side of the first member 10 form a plane that is substantially perpendicular to the Y direction.

[0032] The second member 20 has a tip portion 23 as shown in FIGS. 2B and 3B. By rotating the first member 10 and the second member 20, the tip portion 23 moves on a specific arc-shaped orbit 3 with respect to the first member 10 as shown in FIG. 7. In FIG. 7, the arc-shaped orbit 3 is drawn as a thin line for easy viewing, but when an arc-shaped orbit is drawn for each part of the tip portion 23, the arc-shaped orbit 3 for the entire tip portion 23 will be a thicker line than in FIG. 7. This arc-shaped orbit 3 is defined as an orbit that passes through a virtual reference circle 5 when the first member 10 and the second member 20 are in the closed state. In the closed state, at least a part of the tip portion 23 penetrates this reference circle 5.

[0033] FIG. 8A and FIG. 8B are diagrams for explaining the reference circle 5. FIG. 8A is a side view of the jewelry fastener 1 in the closed state as viewed from the Y2 side, and the X direction is parallel to the vertical direction of the paper surface so as to correspond to FIG. 7. FIG. 8B is a view of the reference circle 5 as viewed from the Z direction. The reference circle 5 has a center 6 at a position further away from the innermost part 14 of the recess 13 in the recess direction (X2 direction) of the recess 13. Also, the reference circle 5 is located in a plane parallel to the rotation axis AX and the X2 direction (that is, the X - Y plane). Further, as shown in FIG. 8B, the reference circle 5 is a circle with which the engaging portion 12 contacts from the inside. In the example of FIG. 8B, the engaging portion 12 contacts the reference circle 5 at the innermost part 14 of the recess 13.

[0034] If the engaging portion 12 is hooked on the opening of the second target member similar to the reference circle 5, when not considering the thickness of the second target member in the Z direction, in the example of FIG. 8B, the edge of the second target member contacts the innermost part 14 of the recess 13. At this time, since the tip 23 moves on the circular arc track 3 defined by the reference circle 5, it does not collide with the edge of the second target member. Therefore, with the engaging portion 12 hooked on the opening of the second target member, the tip 23 can be smoothly inserted into and removed from the opening of the second target member.

[0035] This tip 23, when in the closed state, is located at a place away from the recess 13 on the X2 direction side within the reference circle 5. That is, the tip 23 in the closed state is located on the X2 side of the recess 13 as shown in FIG. 3A etc. when viewed from the Y direction parallel to the rotation axis AX. When the tip 23 is located on the X2 side of the recess 13 in the closed state, when the engaging portion 12 is hooked on the opening of the second target member and suspended, as shown in FIG. 8B, the tip 23 is located above the recess 13 of the engaging portion 12 within the reference circle 5.

[0036] Here, as shown in FIGS. 6A and 7, the rotation axis AX is located in a position away from the concave portion 13 in the direction opposite to the X2 direction, that is, in the X1 direction. Therefore, when the engaging portion 12 is hooked on the opening of the second target member and suspended, the rotation axis AX is located below the concave portion 13. In this case, the tip portion 23 passing through the upper side (X2 side) of the concave portion 13 generally advances in the Z direction in the vicinity of the reference circle 5 as shown by the arc trajectory 3 in FIG. 7. When the Z direction becomes parallel to the horizontal direction in the state where the engaging portion 12 is hooked on the opening of the second target member and suspended, the tip portion 23 generally enters the opening of the second target member in a horizontal direction. Therefore, the tip portion 23 when entering the opening of the second target member is in a posture that is difficult to collide with the edge around the opening.

[0037] Also, as shown in FIG. 3A, etc., the tip portion 23 is bent toward the first member 10 side as it goes toward the leading portion 24 when viewed from the Y direction parallel to the rotation axis AX. That is, the tip portion 23 is bent toward the Z2 side with respect to the X direction as it goes toward the leading portion 24 when viewed from the Y direction. The shape of the tip portion 23 viewed from the Y direction is curved so that the extending direction continuously changes in the order of the X2 direction, the Z2 direction, and the X1 direction from the second base portion 21 side described later. The leading portion 24 is a portion located at the tip of the arc trajectory 3 when changing from the open state to the closed state as shown in FIG. 7. Therefore, the tip portion 23 is less likely to collide with the edge around the opening when entering the opening of the second target member.

[0038] Furthermore, in the leading portion 24 of the tip portion 23, the portion closest to the rotation axis AX is separated from the outer surface 17 on the X2 side of the engaging portion 12 in the closed state (FIGS. 3A and 3B). Thereby, when the fastener 1 for ornaments changes between the open state and the closed state, it is possible to suppress the leading portion 24 of the tip portion 23 from coming into contact with the outer surface 17 of the engaging portion 12 and wearing out.

[0039] As shown in FIGS. 3A and 6A, etc., the second member 20 has a second base portion 21 connected to the tip portion 23. The second base portion 21 extends in the X direction as a whole, and the tip portion 23 is provided at the end on the X2 side of the second base portion 21. As shown in FIGS. 4A and 5A, etc., the width of the tip portion 23 in the Y direction parallel to the rotation axis AX becomes narrower as it goes from the second base portion 21 side toward the leading portion 24 side. Thereby, when changing from the open state to the closed state with the engaging portion 12 hooked on the opening of the second target member, it becomes difficult for the tip portion 23 to hit the edge of the opening.

[0040] As shown in FIGS. 3A and 4A, etc., the outer surface on the Z1 side of the second base portion 21 is a plane generally along the X - Y plane near the center in the Y direction, and is a curved surface curved in the Z2 direction at both ends in the Y direction.

[0041] An operation portion 26 is provided at the end on the X1 side of the second base portion 21. The operation portion 26 protrudes in a direction away from the rotation axis AX as shown in FIG. 6A. In FIG. 6A, the operation portion 26 is rounded as a whole. By operating the operation portion 26 with a finger or the like, the jewelry fastener 1 can be easily opened and closed.

[0042] As shown in FIG. 2B and the like, the second member 20 includes a pair of side walls 25 facing each other in the Y direction parallel to the rotation axis AX. The side walls 25 extend in the Z2 direction from both ends of the second base portion 21 in the Y direction. In the closed state, at least a part of the first member 10 is located between the pair of side walls 25. In the example shown in FIGS. 3A and 4A, most of the first base portion 11 of the first member 10 is located between the pair of side walls 25 in the closed state. The first base portion 11 of the first member 10 located between the pair of side walls 25 in the closed state extends in a direction along the X-Z plane perpendicular to the rotation axis AX. Thereby, the relative displacement in the Y direction between the pair of side walls 25 and the first member 10 is likely to be suppressed. Therefore, the inclination between the axial direction of the shaft 41 fixed to the side wall 25 of the second member 20 and the axial direction by the shaft support holes 42 provided in the two side walls 19 of the first member 10 is likely to be suppressed. Therefore, in the closed state, the inclination between the axial direction of the shaft 41 and the axial direction of the shaft support hole 42 can be suppressed, and unnecessary force applied between the shaft 41 and the shaft support hole 42 can be reduced.

[0043] In the examples of FIGS. 4A, 5B, and 6B, the gap in the Y direction between the first base portion 11 of the first member 10 and the side wall 25 of the second member 20 in the closed state is small. Thereby, since the relative displacement in the Y direction between the pair of side walls 25 and the first member 10 is likely to be suppressed, the burden on the connecting portion 40 due to the inclination of the axial direction in the first member 10 and the axial direction in the second member 20 can be effectively reduced.

[0044] The end surface on the Z2 side of each side wall 25 forms a plane substantially perpendicular to the Z direction. As shown in FIG. 4A, the end surface on the Z2 side of each side wall 25 and the bottom surface 18 of the first member 10 are substantially aligned in the Z direction in the closed state.

[0045] As shown in FIGS. 4A, 5A, 5B, etc., the outer surface (outer side surface) of the jewelry fastener 1 in the Y direction by the pair of side walls 25 is generally a plane along the X-Z plane. However, the outer side surface of the jewelry fastener 1 is not limited to such a plane and may have other shapes. For example, the side surface on the Y1 side may be curved so as to bulge toward the Y1 side, and the side surface on the Y2 side may be curved so as to bulge toward the Y2 side. In this case, the jewelry fastener 1 has a shape similar to an egg when viewed from the Z direction. By having such a shape, the area of the outer side surface increases, making it easier to apply various decorations (letters, figures, logos, etc.) to the outer side surface.

[0046] As shown in FIGS. 2B, 3B, 7, etc., in the open state, a gap 2 is formed between the first member 10 and the second member 20. This gap 2 in the open state forms a passage for the edge portion facing the opening of the second target member (for example, the edge portion 56 facing the opening 55 of the ring 53 of the linear member 50 shown in FIG. 7) to enter and exit the concave portion 13 of the hooking portion 12. When in the closed state, as shown in FIGS. 2A, 3A, etc., the entry and exit of the edge portion (such as the edge portion 56 of the ring 53 shown in FIG. 7) into and out of the concave portion 13 through the gap 2 becomes impossible.

[0047] In the examples of FIGS. 2A, 3A, etc., the gap 2 is almost completely blocked in the closed state. However, if it is so small that the entry and exit of the edge portion into the concave portion 13 through the gap 2 becomes impossible, a gap may remain between the first member 10 and the second member 20 in the closed state.

[0048] As shown in FIG. 3A, etc., the first member 10 and the second member 20 form an internal space 4 in the closed state. This internal space 4 penetrates in the Y direction and forms a closed region surrounded by the first member 10 and the second member 20. That is, the first member 10 and the second member 20 form a through hole penetrating in the Y direction in the closed state.

[0049] In the closed state, in the internal space 4, the concave portion 13 of the engaging portion 12 faces a part of the surface of the second member 20. In the example of FIG. 3A, as the surface of the second member 20, the edge portion 27 of the side wall 25 of the second member 20 faces the internal space 4. The surface of the second member 20 (the edge portion 27 of the side wall 25) facing this internal space 4 includes two types of portions (first portion S1, second portion S2) classified according to the direction of the normal vector viewed from the Y direction parallel to the rotation axis AX.

[0050] "N1" in FIG. 3A indicates one of the normal vectors (hereinafter referred to as "first normal vector N1") at each position of the first portion S1 viewed from the Y direction parallel to the rotation axis AX in the closed state. Also, "N2" in FIG. 3A indicates one of the normal vectors (hereinafter referred to as "second normal vector N2") at each position of the second portion S2 viewed from the Y direction parallel to the rotation axis AX in the closed state. Both the first normal vector N1 and the second normal vector N2 are normal vectors facing the direction of pushing the second member 20. As shown in FIG. 3A, the first normal vector N1 at each position of the first portion S1 includes a component directed in the direction of the open state (substantially the Z1 direction). On the other hand, the second normal vector N2 at each position of the second portion S2 includes a component directed in the direction opposite to the direction of the open state (substantially the Z2 direction).

[0051] As shown in FIG. 3A, the first portion S1 is inclined in the direction (Z1 direction) away from the first base portion 11 of the first member 10 as it moves away from the rotation axis AX when viewed from the Y direction. The second portion S2 is inclined in the direction (Z2 direction) approaching the first base portion 11 of the first member 10 as it moves away from the rotation axis AX.

[0052] When the first portion S1 is pushed in the direction along the X-Z plane by an external force from an object located in the internal space 4, a component in the same direction as the first normal vector N1 included in the external force from the object acts on the second member 20. Since the first normal vector N1 at each position of the first portion S1 includes a component directed in the direction of the open state (substantially the Z1 direction), when a component of the external force in the same direction as the first normal vector N1 acts on the second member 20, the second member 20 is likely to rotate in the direction of the open state. On one hand, when the second part S2 is pushed in the direction along the X-Z plane by an external force from an object located in the internal space 4, a component in the same direction as the second normal vector N2 included in the external force from the object acts on the second member 20. Since the second normal vector N2 at each position of the second part S2 includes a component directed in the direction opposite to the opening direction (substantially the Z2 direction), when a component of the external force in the same direction as the second normal vector N2 acts on the second member 20, it is difficult for the second member 20 to rotate in the opening direction.

[0053] In the fastener 1 for ornaments according to the present embodiment, as shown in FIG. 3A, the length of the first part S1 is shorter than the length of the second part S2. Therefore, when the edge of the opening of the second target member (such as the edge 56 of the ring 53 shown in FIG. 7) is located in the internal space 4, this edge is more likely to hit the second part S2 rather than the first part S1 on the surface of the second member 20 (the edge 27 of the side wall 25). As a result, it becomes difficult for the second member 20 to rotate in the opening direction with respect to the first member 10. Therefore, in a state where the fastener 1 for ornaments is connected to the second target member, the closed state of the fastener 1 for ornaments can be stably maintained.

[0054] Also, in the fastener 1 for ornaments according to the present embodiment, in the closed state, as shown in FIG. 3A, a gap G is formed between the end portion 121 of the engaging portion 12 facing the internal space 4 and the edge 27 of the side wall 25 of the second member 20. The size of the gap G as viewed from the Y direction parallel to the rotation axis AX is smaller than the thickness of the cross-section perpendicular to the Y direction of the peripheral portion of the opening of the second target member (such as the ring 53 shown in FIG. 7) that can be inserted into the internal space 4. As a result, it becomes difficult for the edge of the opening of the second target member located in the internal space 4 (such as the edge 56 of the ring 53 shown in FIG. 7) to pass through the gap G and reach the first part S1, so it becomes more difficult for the edge of the second target member to hit the first part S1. Therefore, the closed state of the fastener 1 for ornaments can be maintained more stably.

[0055] Next, an example of the connection operation using the jewelry fastener 1 described above will be described. Here, an operation for connecting the jewelry fastener 1 to a second target member will be described, with the opening 55 of the ring 53 provided at the end 52 of the linear member 50 as the opening of the second target member.

[0056] First, as shown in FIG. 7, the ring 53 as the second target member is suspended. For example, when the linear member 50 is a bracelet, it is only necessary to place the linear member 50 on the wrist and let the end 52 (ring 53) of the linear member 50 hang down. Next, pinch the vicinity of the attachment portion 30 of the jewelry fastener 1 with a finger and push down the operation portion 26 to open the first member 10 and the second member 20. Then, while maintaining this open state, hook the hooking portion 12 on the opening 55 of the suspended ring 53. This hooking operation can be performed very easily because it only involves positioning the concave portion 13 of the hooking portion 12 at the edge 56 of the ring 53. Finally, when the force applied to the operation portion 26 is relaxed and the pushing down is stopped, the first member 10 and the second member 20 biased by the torsion coil spring 60 rotate themselves in the direction from the open state to the closed state. At this time, the tip portion 23 of the second member 20 is inserted into the opening 55 of the ring 53 without hitting the edge of the ring 53, and the jewelry fastener 1 becomes the closed state. As a result, the edge 56 of the ring 53 is confined in the internal space 4 (FIG. 3A) and cannot come out, and the connection between the jewelry fastener 1 and the ring 53 is completed.

[0057] Note that the above-described connection operation is an example, and the connection operation of the jewelry fastener 1 is possible by other methods as well. For example, the ring 53 as the second target member may be pinched with one hand, the jewelry fastener 1 may be pinched with the other hand, and the two may be connected. Also in this case, since it is almost the same as the case of hooking a hook-shaped object on a ring-shaped object, the connection operation can be performed very easily.

[0058] Next, an example of the separation operation using the jewelry fastener 1 described above will be described. Here too, an operation for separating the jewelry fastener 1 from the ring 53 will be described, with the ring 53 of the linear member 50 as the second target member.

[0059] First, pinch the vicinity of the attachment portion 30 of the jewelry fastener 1 with your finger and press down the operation portion 26 to open the first member 10 and the second member 20. Then, while maintaining this open state, let the edge portion 56 of the ring 53 escape from the concave portion 13 of the engaging portion 12. In this case, the ring 53 may be in a hanging state as shown in FIG. 7, or may be placed on an object such as clothing. When the ring 53 is in a hanging state, the concave portion 13 of the engaging portion 12 is separated from the edge portion 56 of the ring 53 by an operation opposite to the connecting operation. Also, when the ring 53 is placed on an object, the jewelry fastener 1 in the open state is gently lifted so that the engaging portion 12 is positioned on the upper side as shown in FIG. 7, so that the edge portion 56 remaining in the concave portion 13 moves downward and separates from the concave portion 13. When the pressing down of the operation portion 26 is stopped in a state where the edge portion 56 has separated from the concave portion 13, the jewelry fastener 1 returns to the closed state again, and the separation of the jewelry fastener 1 and the ring 53 is completed.

[0060] Note that the above-described separation operation is an example, and the separation operation of the jewelry fastener 1 can also be performed by other methods. For example, the ring 53 as the second target member may be pinched with one hand, and the jewelry fastener 1 may be pinched with the other hand to separate the two. Also in this case, since it is almost the same as the case of separating a ring-shaped object from a hook-shaped object, the separation operation can be performed very easily.

[0061] As described above, in the fastener 1 for ornaments according to the present embodiment, the recess 13 is recessed in the direction (X2 direction) away from the attachment portion 30. Thereby, when the hooking portion 12 is hooked on the opening of the second target member and suspended (FIG. 7), the contact point between the edge of the opening and the recess 13 easily shifts toward the innermost portion 14 of the recess 13, and the hooking portion 12 can be stably hooked on the opening of the second target member. Further, the tip portion 23 of the second member 20 moves on the arc-shaped orbit 3 with respect to the first member 10 by rotating the first member 10 and the second member. This arc-shaped orbit 3 is an orbit that passes through a virtual reference circle 5 (FIGS. 8A and 8B) in the closed state, and at least a part of the tip portion 23 passes through the reference circle 5 in the closed state. The reference circle 5 has a center 6 at a position away from the innermost portion 14 of the recess 13 in the X2 direction in the X2 direction, is located on a plane parallel to the rotation axis AX and the X2 direction, and is a circle with which the hooking portion 12 contacts from the inside. When this reference circle 5 is regarded as the opening of the second target member, the hooking portion 12 can be stably hooked on the opening (reference circle 5) and suspended. Further, in this case, at least a part of the tip portion 23 can be smoothly inserted into the opening (reference circle 5) without colliding with the edge of the opening (reference circle 5), and the fastener 1 for ornaments can be closed. Therefore, it is possible to easily perform the connection operation with one hand even for a second target member having an opening according to the reference circle 5, and the separation operation opposite to the connection operation can also be easily performed.

[0062] In the fastener 1 for ornaments according to the present embodiment, the tip portion 23 in the closed state is located at a position away from the recess 13 in the X2 direction on the reference circle 5. Thereby, when the first target member and the second target member are pulled in a direction away from each other in the closed state, the edge of the second target member pushes the recess 13 in the X2 direction near the innermost portion 14 of the recess 13, while the tip portion 23 is overlapped with the hooking portion 12 on the X2 side of the recess 13. That is, the hooking portion 12 and the tip portion 23 are arranged in multiple layers with respect to the direction (X2 direction) of the external force applied to the recess 13. Therefore, the strength of the fastener 1 for ornaments when the first target member and the second target member are pulled is increased, and the connected state can be stably maintained.

[0063] Further, in the fastener 1 for ornaments according to the present embodiment, since the tip portion 23 in the closed state is located at a position away from the concave portion 13 in the X2 direction on the reference circle 5, when the hooking portion 12 is hooked on the opening of the second target member and suspended, the tip portion 23 is located above the concave portion 13 of the hooking portion 12 (FIGS. 8A and 8B). As a result, the tip portion 23 is more likely to be located closer to the center of the opening than the hooking portion 12 that contacts the lower edge of the opening in the second target member. Therefore, it becomes difficult for the tip portion 23 to contact the edge of the opening.

[0064] In the fastener 1 for ornaments according to the present embodiment, the concave portion 13 of the hooking portion 12 is recessed in the X2 direction perpendicular to the rotation axis AX, and the rotation axis AX is located at a position away from the concave portion 13 in the opposite direction (X1 direction) of the X2 direction. Therefore, when the hooking portion 12 is hooked on the opening of the second target member and suspended, the rotation axis AX comes to be located below the concave portion 13, and the tip portion 23 passing through the upper side (X2 side) of the concave portion 13 enters the opening of the second target member in a substantially horizontal direction (Z direction) (FIG. 7). Therefore, it becomes difficult for the tip portion 23 when entering the opening of the second target member to collide with the edge around the opening. Further, when the rotation axis AX is located below the concave portion 13, the opening and closing operation (such as pressing down the operation portion 26) performed at a location close to the rotation axis AX is performed at a location close to the lower side of the concave portion 13. Therefore, it becomes easier to perform the opening and closing operation without affecting the suspended state of the hooking portion 12.

[0065] In the fastener 1 for ornaments according to the present embodiment, in the closed state, when the hook portion 12 of the first member 10 contacts the second member 20, the rotation of the second member 20 with respect to the first member 10 is restricted. As a result, compared with the case where the tip portion 23 of the second member 20 directly hits the second target member and the rotation of the second member 20 is restricted, the force by the biasing member (torsion coil spring 60) is stably applied between the first member 10 and the second member 20, so that the closed state can be stably maintained. Further, since the second target member can freely move in the internal space 4 as a through hole, the movable range of the fastener 1 for ornaments with respect to the second target member becomes wider, and wear due to rubbing between the fastener 1 for ornaments and the second target member can be suppressed. Furthermore, when the hook portion 12 and the second member 20 come into contact with each other, the gap 2 (FIGS. 2B and 3B) between the first member 10 and the second member 20 in the open state can be surely blocked.

[0066] In the fastener 1 for ornaments according to the present embodiment, when viewed from the Y direction parallel to the rotation axis AX, the hook portion 12 is bent toward the second member 20 as it approaches the end portion 121, and the tip portion 23 is bent toward the first member 10 as it approaches the leading portion 24 (FIG. 3B). Thereby, when connecting the fastener 1 for ornaments to the opening of the second target member, it becomes easier to insert the hook portion 12 and the tip portion 23 into the opening, respectively.

[0067] In the fastener 1 for ornaments according to the present embodiment, the portion closest to the rotation axis AX at the leading portion 24 of the tip portion 23 is separated from the outer surface 17 of the hook portion 12 on the X2 side in the closed state (FIG. 3A). Thereby, when the fastener 1 for ornaments is opened and closed, it becomes difficult for the leading portion 24 of the tip portion 23 to contact the outer surface 17 of the hook portion 12, so that wear of the hook portion 12 and the tip portion 23 can be suppressed.

[0068] In the fastener 1 for ornaments according to this embodiment, in the closed state, at least a part of the first member 10 is located between the pair of side walls 25 and extends in a direction along a plane perpendicular to the rotation axis AX. As a result, relative displacement in the Y direction between the pair of side walls 25 and the first member 10 is likely to be suppressed. Therefore, the burden on the connecting portion 40 (for example, an unnecessary force applied between the shaft 41 and the shaft support hole 42) due to the inclination of the axial direction in the first member 10 and the axial direction in the second member 20 can be reduced.

[0069] In the fastener 1 for ornaments according to this embodiment, the surface of the second member 20 facing the internal space 4 in the closed state includes a first portion S1 and a second portion S2. The first normal vector N1 (the normal vector in the direction of pressing the second member 20) at each position of the first portion S1 as viewed from the Y direction parallel to the rotation axis AX in the closed state includes a component directed in the direction of opening, and the second normal vector N2 (the normal vector in the direction of pressing the second member 20) at each position of the second portion S2 as viewed from the Y direction parallel to the rotation axis AX in the closed state includes a component directed in the direction opposite to the direction of opening. And, as viewed from the Y direction parallel to the rotation axis AX in the closed state, the length of the first portion S1 is shorter than the length of the second portion S2 (FIG. 3A). As a result, when the edge of the opening of the second target member located in the internal space 4 hits the surface of the second member 20 (the edge 27 of the side wall 25) facing the internal space 4, the edge is more likely to hit the second portion S2 than the first portion S1, and it becomes difficult for the second member 20 to rotate in the direction of opening with respect to the first member 10. Therefore, in a state where the fastener 1 for ornaments is connected to the second target member, the closed state of the fastener 1 for ornaments can be stably maintained.

[0070] In the fastener 1 for ornaments according to this embodiment, the width of the tip portion 23 in the Y direction parallel to the rotation axis AX becomes narrower from the second base portion 21 side toward the leading portion 24 side of the tip portion 23. As a result, when changing from the open state to the closed state with the engaging portion 12 hooked on the opening of the second target member, it is possible to make it difficult for the tip portion 23 to hit the edge of the opening.

[0071] In the fastener 1 for ornaments according to the present embodiment, since the operation portion 26 protruding in the direction away from the rotation axis AX is provided on the second member 20, the second member 20 can be easily rotated with respect to the first member 10.

[0072] In the fastener 1 for ornaments according to the present embodiment, the first member 10 and the second member 20 are urged by an urging member (torsion coil spring 60) so as to rotate in the direction of changing from the open state to the closed state. As a result, since it is not necessary to manually rotate the first member 10 and the second member 20 from the open state to the closed state, the connection operation and the separation operation can be performed more easily.

[0073] Next, a modified example of the fastener 1 for ornaments according to the present embodiment will be described with reference to FIGS. 9 and 10.

[0074] FIG. 9 is a view showing a modified example of the fastener 1 for ornaments according to the present embodiment, and is an enlarged side view of the vicinity of the hooking portion 12 of the first member 10. The recess 13 of the hooking portion 12 shown in FIG. 9 is curved in an arc shape between one end 15 connected to the first base portion 11 and the other end 16 away from the first base portion 11 and facing the second member 20 side (Z1 side) when viewed from the Y direction parallel to the rotation axis AX. And the position of the innermost part 14 of the recess 13 in the Z direction perpendicular to the X2 direction is closer to the one end 15 than the middle between the one end 15 and the other end 16 when viewed from the Y direction parallel to the rotation axis AX. That is, the distance D1 shown in FIG. 9 is shorter than the distance D2.

[0075] According to such a configuration, when the edge portion of the second target member presses the recess 13, the edge portion presses the recess 13 near the innermost part 14 which is at a position relatively close to the first base portion 11. For example, when the second target member is pulled, the edge portion presses the recess 13 near the innermost part 14 close to the first base portion 11. Therefore, even when a pulling force is applied to the second target member in a state where the bottom surface 18 of the first base portion 11 is in contact with clothes or the like, it is possible to make it difficult to invert the posture of the fastener 1 for ornaments in the Z direction upside down.

[0076] FIG. 10 is a diagram showing another modification of the jewelry fastener 1 according to the present embodiment, and is a side view of the jewelry fastener 1 including the locking portion 70. The jewelry fastener 1 of the modification shown in FIG. 10 has a locking portion 70 as means for maintaining the closed state of the first member 10 and the second member 20. The locking portion 70 locks the first member 10 and the second member 20 in the closed state so that the closed state is not easily released. In the example of FIG. 10, the locking portion 70 has a locking projection 71 provided at the tip portion 23 and a locking recess 72 provided at the hook portion 12. By fitting the locking projection 71 into the locking recess 72 in the closed state, the closed state of the first member 10 and the second member 20 can be maintained.

[0077] In the example of FIG. 10, the locking projection 71 is provided at the tip portion 23 and the locking recess 72 is provided at the hook portion 12. However, in other modifications, a locking recess may be provided at the tip portion 23 and a locking projection may be provided at the hook portion 12. Further, the locations where the locking projection and the locking recess are provided may be other than the tip portion 23 and the hook portion 12. The means for maintaining the closed state so that the first member 10 and the second member 20 do not rotate in the closed state is not limited to locking the first member 10 and the second member 20 by fitting of the convex portion and the concave portion as described above. For example, the closed state may be maintained by suppressing rotation by means of generating friction between the first member 10 and the second member 20.

[0078] <Second Embodiment> Next, the jewelry fastener 1A according to the second embodiment will be described. FIG. 11A is a diagram showing an example of the jewelry fastener 1A according to the second embodiment, and is a side view in the closed state. FIG. 11B is a diagram showing a part of the side view shown in FIG. 11A extracted. FIG. 11C is a plan view of the jewelry fastener 1A. FIG. 12 is a side view of the jewelry fastener 1A in the open state. FIG. 13 is a diagram showing a state in which the jewelry fastener 1A is hooked on one end of a linear member and suspended. FIGS. 14A and 14B are diagrams for explaining a reference circle.

[0079] The fastener 1A for ornaments according to the second embodiment also separably connects the first target member and the second target member, similarly to the fastener 1 for ornaments according to the first embodiment. The fastener 1A for ornaments according to the second embodiment is mainly different from the fastener 1 for ornaments according to the first embodiment in that the attachment portion is provided in the connecting portion, the second member is sandwiched between a pair of wall portions of the first member, and a magnet is used as means for maintaining the closed state.

[0080] The corresponding components of the fastener 1 for ornaments and the fastener 1A for ornaments are given the same number at the beginning of the reference numeral, and only the components of the fastener 1A for ornaments are given "A" at the end of the reference numeral.

[0081] The fastener 1A for ornaments includes a first member 10A, a second member 20A, an attachment portion 30A attached to the first target member, and a connecting portion 40A. The connecting portion 40A (FIG. 11C) rotatably connects the first member 10A and the second member 20A. The fastener 1A for ornaments assumes an open state or a closed state when the first member 10A and the second member 20A rotate at the connecting portion 40A (FIGS. 11A and 12). As shown in FIG. 11C, the rotation axis AX of the first member 10A and the second member 20A is parallel to the Y direction.

[0082] As shown in FIGS. 11A and 11C etc., the mounting portion 30A is provided on the connecting portion 40A (shaft 41A). The mounting portion 30A has, for example, as shown in FIG. 13, a ring 54A (first target member) that constitutes one end portion 51A of the linear member 50A attached thereto. The mounting portion 30A has, as shown in FIGS. 11A and 11C etc., two arm portions 32A spaced apart in the Y direction, and an intermediate portion 33A connecting one end on the X1 side of the two arm portions 32A. The other ends on the X2 side of the two arm portions 32A are fixed to both ends of a shaft 41A extending in the Y direction. The intermediate portion 33A has a hole 31A penetrating in the Z direction, and the ring 54A is inserted into this hole 31A (FIG. 13). Similar to the linear member 50 shown in FIG. 1, the linear member 50A has a plurality of frame portions 57A and a connecting member 58A connecting two adjacent frame portions 57A. The ring 54A is fixed to the frame portion 57A at the end of the linear member 50A.

[0083] As shown in FIGS. 11A and 12 etc., the first member 10A has a hooking portion 12A. The hooking portion 12A is hooked on an opening of the second target member. In the example of FIG. 13, the hooking portion 12A is hooked on an opening 55A of a ring 53A that constitutes the other end portion 52A of the linear member 50A.

[0084] As shown in FIG. 11C etc., the mounting portion 30A (shaft 41A) is located in the X1 direction as viewed from the hooking portion 12A. The hooking portion 12A has a recessed portion 13A recessed in a direction away from the mounting portion 30A (shaft 41A) (also referred to as the first direction). As shown in FIGS. 11A and 12 etc., the recessed portion 13A is recessed in the X2 direction. The X2 direction in which the recessed portion 13A is recessed is perpendicular to the rotation axis AX (Y direction parallel to the rotation axis AX). The recessed portion 13A is, for example, as shown in FIG. 12 etc., an edge or surface of the hooking portion 12A facing the mounting portion 30A (shaft 41A) when viewed from the Y direction.

[0085] As shown in FIGS. 12 and 13, etc., the engaging portion 12A has an end portion 121A that is inserted into an opening (in the example of FIG. 13, the opening 55A of the ring 53A that constitutes the other end portion 52A of the linear member 50A) of the second target member. As shown in FIG. 12, etc., when viewed from the Y direction parallel to the rotation axis AX, the engaging portion 12A bends toward the second member 20A side as it approaches the end portion 121A. That is, when viewed from the Y direction, the engaging portion 12A bends toward the Z1 side as it approaches the end portion 121A with respect to the X direction. The shape of the engaging portion 12A when viewed from the Y direction is curved such that the extending direction continuously changes in the order of the X2 direction, Z1 direction, and X1 direction from the first base portion 11A side described later.

[0086] As shown in FIG. 11, in the closed state, when the engaging portion 12A of the first member 10A contacts the second member 20A, the rotation of the second member 20A with respect to the first member 10A is restricted.

[0087] As shown in FIGS. 11A and 12, etc., the first member 10A has a first base portion 11A that is connected to the engaging portion 12A. The first base portion 11A extends in a direction generally along the X direction as a whole. The shaft 41A of the connecting portion 30A is attached to the X1-side end of the first base portion 11A, and the engaging portion 12A is provided at the X2-side end of the first base portion 11A. The first base portion 11A has a bottom surface 18A that extends in the X direction when viewed from the Y direction parallel to the rotation axis AX. The bottom surface 18A is the surface on the Z2 side of the first base portion 11A and forms a plane generally perpendicular to the Z direction.

[0088] The inner surface 101A on the Z1 side of the first base portion 11A facing the second member 20A is continuously connected to the concave portion 13A of the engaging portion 12A at the X2-side end as shown in FIG. 12. The concave portion 13A is arcuately curved between one end connected to the first base portion 11A and the other end away from the first base portion 11A and toward the second member 20A side (Z1 side) when viewed from the Y direction parallel to the rotation axis AX. The inner surface 101A of the first base portion 11A extends in the X1 direction from one end of this curved concave portion 13A and forms a plane generally perpendicular to the Z direction.

[0089] As shown in FIGS. 11A, 11C, and 12, the first member 10 has a pair of side walls 19A that face each other in the Y direction parallel to the rotation axis AX. The side walls 19A each rise from the inner surface 101A in the Z1 direction. The portion (second base 21A) of the second member 20A close to the X1 side is sandwiched between the two side walls 19A. The shapes of the two side walls 19A are generally symmetric with respect to a plane (Z-X plane) perpendicular to the rotation axis AX.

[0090] As shown in FIGS. 11A and 11C, the connecting portion 40A includes a shaft support hole 42A that penetrates the second member 20A, two shaft support holes 43A that penetrate the two side walls 19A in the Y direction respectively, and a shaft 41A supported by one shaft support hole 42A and the two shaft support holes 43A. Both ends of the shaft 41A in the Y direction are fixed to the two arm portions 32A of the attachment portion 30A. The shaft 41A may be formed integrally with the arm portion 32A, for example, or may be fixed to the arm portion 32A by a method such as welding.

[0091] The second base 21A of the second member 20A located between the pair of side walls 19A extends along the X-Z plane perpendicular to the rotation axis AX. Thereby, the relative displacement in the Y direction between the pair of side walls 19A and the second member 20A is likely to be suppressed. Therefore, the inclination between the axial direction guided by the shaft support hole 42A of the second member 20A and the axial direction guided by the shaft support holes 43A of the pair of side walls 19A is likely to be suppressed. Accordingly, unnecessary forces applied between each shaft support hole (42A, 43A) and the shaft 41A due to the inclination of these axial directions can be reduced.

[0092] As shown in FIGS. 11A and 12, the second member 20A has a tip portion 23A. The tip portion 23A moves on a specific arc orbit 3A with respect to the first member 10A as shown in FIG. 13 by rotating the first member 10A and the second member 20A. When an arc orbit is drawn for each part of the tip portion 23A, the arc orbit 3A for the entire tip portion 23A becomes a thicker line than that in FIG. 13. This arc orbit 3A is defined as an orbit that passes through a virtual reference circle 5A when the first member 10A and the second member 20A are in a closed state. In the closed state, at least a part of the tip portion 23A penetrates this reference circle 5A.

[0093] FIGS. 14A and 14B are diagrams for explaining the reference circle 5A. FIG. 14A is a side view of the jewelry fastener 1A in the closed state as viewed from the Y2 side, and the X direction is parallel to the vertical direction of the paper surface so as to correspond to FIG. 13. FIG. 14B is a view of the reference circle 5A as viewed from the Z direction. The reference circle 5A has a center 6A at a position further away in the X2 direction from the innermost part 14A of the recess 13A in the X2 direction (the recess direction of the recess 13A). Also, the reference circle 5A is located in a plane parallel to the rotation axis AX and the X2 direction (i.e., the X - Y plane). Furthermore, as shown in FIG. 14B, the reference circle 5A is a circle with which the engaging portion 12A contacts from the inside. In the example of FIG. 14B, the engaging portion 12A contacts the reference circle 5A near the innermost part 14A of the recess 13A.

[0094] If the engaging portion 12A is hooked on an opening of a second target member similar to the reference circle 5A, when not considering the Z - direction thickness of the second target member, in the example of FIG. 14B, the edge of the second target member abuts against the recess 13A. At this time, since the tip portion 23A moves on the arc orbit 3A defined by the reference circle 5A, it does not collide with the edge of the second target member. Therefore, with the engaging portion 12A hooked on the opening of the second target member, the tip portion 23A can be smoothly inserted into and removed from the opening of the second target member.

[0095] When in the closed state, this tip portion 23A is located at a position away from the recess 13A on the X2 direction side within the reference circle 5A. That is, the tip portion 23A in the closed state is located on the X2 side of the recess 13A when viewed from the Y direction parallel to the rotation axis AX (FIG. 11A). When the hooking portion 12A is hooked on the opening of the second target member and suspended, due to the tip portion 23A being located on the X2 side of the recess 13A in the closed state, as shown in FIG. 14B, the tip portion 23A is located above the recess 13A of the hooking portion 12A.

[0096] Here, as shown in FIG. 11A etc., the rotation axis AX is located at a position away from the recess 13A in the direction opposite to the X2 direction, that is, in the X1 direction. Therefore, when the hooking portion 12A is hooked on the opening of the second target member and suspended, the rotation axis AX is located below the recess 13A. In this case, the tip portion 23A passing through the upper side (X2 side) of the recess 13A generally advances in the Z direction in the vicinity of the reference circle 5A as shown by the arc trajectory 3A in FIG. 13. When the Z direction becomes parallel to the horizontal direction in the state where the hooking portion 12A is hooked on the opening of the second target member and suspended, the tip portion 23A generally enters the opening of the second target member in a horizontal direction. Therefore, the tip portion 23A when entering the opening of the second target member is in a posture that is difficult to collide with the edge around the opening.

[0097] Also, as shown in FIG. 11A etc., the tip portion 23A bends toward the first member 10A side as it goes toward the leading portion 24A when viewed from the Y direction parallel to the rotation axis AX. That is, when viewed from the Y direction, the tip portion 23A bends toward the Z2 side as it goes toward the leading portion 24A with respect to the X direction. The shape of the tip portion 23A when viewed from the Y direction is curved such that the extending direction continuously changes in the order of the X2 direction, Z2 direction, and X1 direction from the second base portion 21A side described later. The leading portion 24A is the portion located at the tip of the arc trajectory 3A when changing from the open state to the closed state as shown in FIG. 13. Therefore, when the tip portion 23A enters the opening of the second target member, it is difficult to collide with the edge around the opening.

[0098] Furthermore, at the tip portion 23A, the portion closest to the rotation axis AX at the leading end portion 24A is separated from the outer surface 17A on the X2 side of the engaging portion 12A in the closed state (FIG. 11A). Thereby, when the jewelry fastener 1A changes between the open state and the closed state, it is possible to suppress the leading end portion 24A of the tip portion 23A from contacting and wearing against the outer surface 17A of the engaging portion 12A.

[0099] As shown in FIGS. 11A, 11C, 12, etc., the second member 20A has a second base portion 21A connected to the tip portion 23A. The second base portion 21A has a plate-like shape parallel to the X-Z plane and extends in the direction along the X direction as a whole. The tip portion 23A is provided at the end on the X2 side of the second base portion 21A (FIG. 11A), and a shaft support hole 42A is provided on the X1 side of the second base portion 21A (FIG. 11C). On the Z2 side of the second base portion 21A, there are a bottom surface 201A that contacts the inner surface 101A on the Z1 side of the first base portion 11A in the closed state, an edge portion 27A that faces the internal space 4A described later in the closed state, and a side edge 202A that contacts the engaging portion 12A in the closed state. In the closed state, the bottom surface 201A is generally parallel to the X direction, and the edge portion 27A extends generally in the Z1 direction from the inner surface 101A side. The second base portion 21A has a large width in the Z direction at the portion corresponding to the bottom surface 201A and a small width in the Z direction at the portion corresponding to the side edge 202A.

[0100] An operation portion 26A is provided at the end on the X1 side of the second base portion 21A. As shown in FIG. 11A, the operation portion 26A protrudes in a direction away from the rotation axis AX. By operating the operation portion 26A with a finger or the like, the jewelry fastener 1A can be easily opened and closed.

[0101] The fastener 1A for ornaments has, as means for maintaining the closed state, a magnet 81A provided on the first member 10A and a magnet 82A provided on the second member 20A. As shown in Fig. 11A, the magnet 81A is embedded near the inner surface 101A of the first base 11A, and the magnet 82A is embedded near the bottom surface 201A of the second base 21A. In the closed state, when the inner surface 101A of the first base 11A and the bottom surface 201A of the second base 21A come into contact, the magnet 81A provided on the first base 11A and the magnet 82A provided on the second base 21 come close to each other as shown in Fig. 11A. Thereby, the magnet 81A and the magnet 82A are attracted by magnetic force, and the closed state where the inner surface 101A of the first base 11A and the bottom surface 201A of the second base 21A are in contact is maintained. One of the magnet 81A and the magnet 82A may be a soft magnetic material.

[0102] As shown in Fig. 12, in the open state, a gap 2A is formed between the first member 10A and the second member 20A. This gap 2A in the open state forms a passage for the edge (the edge 56A facing the opening 55A of the ring 53A of the linear member 50A) facing the opening of the second target member to be able to enter and exit the concave portion 13A of the hooking portion 12A. When it becomes the closed state, as shown in Fig. 11A, the entry and exit of the edge (the edge 56A of the ring 53A) to the concave portion 13A through the gap 2A becomes impossible.

[0103] As shown in Fig. 11A, the first member 10A and the second member 20A form an internal space 4A in the closed state. This internal space 4A penetrates in the Y direction and forms a closed region surrounded by the first member 10A and the second member 20A. That is, the first member 10A and the second member 20A form a through hole penetrating in the Y direction in the closed state.

[0104] In the closed state, in the internal space 4A, the concave portion 13A of the engaging portion 12A faces the surface of the second member 20A. In the example of FIG. 11A, as the surface of the second member 20A, the edge portion 27A of the second base portion 21A of the second member 20A faces the internal space 4A. The surface of the second member 20A (the edge portion 27A of the second base portion 21A) facing this internal space 4A includes two types of portions (a first portion S3 and S4, a second portion S5) classified according to the direction of the normal vector as viewed from the Y direction parallel to the rotation axis AX.

[0105] "N3" and "N4" in FIG. 11B respectively indicate one of the normal vectors (hereinafter, respectively referred to as "first normal vector N3", "first normal vector N4") at each position of the first portions S3 and S4 as viewed from the Y direction parallel to the rotation axis AX in the closed state. Further, "N5" in FIG. 11B indicates one of the normal vectors (hereinafter, referred to as "second normal vector N5") at each position of the second portion S5 as viewed from the Y direction parallel to the rotation axis AX in the closed state. The first normal vector N3, the first normal vector N4, and the second normal vector N5 are all normal vectors facing the direction of pushing the second member 20A. As shown in FIG. 11B, the first normal vector N3 at each position of the first portion S3 and the first normal vector N4 at each position of the first portion S4 each include a component directed in the direction of becoming the open state (substantially the Z1 direction). On the other hand, the second normal vector N5 at each position of the second portion S5 includes a component directed in the direction opposite to the direction of becoming the open state (substantially the Z2 direction).

[0106] As shown in FIG. 11A, the first portions S3 and S4 are inclined in the direction (Z1 direction) away from the first base portion 11A of the first member 10A as they are farther from the rotation axis AX as viewed from the Y direction. As shown in FIG. 11, the second portion S5 is inclined in the direction (Z2 direction) approaching the first base portion 11A of the first member 10A as it is farther from the rotation axis AX.

[0107] In the fastener 1A for ornaments according to the present embodiment, as shown in FIG. 11A, the length including the first portions S3 and S4 is shorter than the length of the second portion S5. Therefore, when the edge of the opening of the second target member (the edge 56A of the ring 53A) is located in the internal space 4A, this edge is more likely to contact the second portion S5 than the first portions S3 and S4 on the surface of the second member 20A (the edge 27A of the second base portion 21A). As a result, it becomes difficult for the second member 20A to rotate in the direction of an open state with respect to the first member 10A.

[0108] Further, in the fastener 1A for ornaments according to the present embodiment, in the closed state, as shown in FIG. 11A, a gap GA is formed between the end portion 121A of the engaging portion 12A facing the internal space 4A and the edge 27A of the first base portion 11A of the second member 20A. The size of the gap GA as viewed from the Y direction parallel to the rotation axis AX is smaller than the thickness of the cross section perpendicular to the Y direction of the peripheral portion of the opening of the second target member (such as the ring 53A shown in FIG. 13) that can be inserted into the internal space 4A. As a result, it becomes difficult for the edge of the opening of the second target member located in the internal space 4A (such as the edge 56A of the ring 53A shown in FIG. 13) to pass through the gap GA and reach the first portion S4, so that it becomes more difficult for the edge of the second target member to contact the first portion S4.

[0109] Next, an example of the connection operation by the above-described fastener 1A for ornaments will be described. Here, the operation when connecting the fastener 1A for ornaments to the second target member with the opening 55A of the ring 53A provided at the end portion 52A of the linear member 50A as the opening of the second target member will be described.

[0110] First, as shown in FIG. 13, the ring 53A as the second target member is suspended. For example, the linear member 50A is placed on the wrist, and the ring 53A at the end 52A is hung downward. Next, the operation portion 26A of the jewelry fastener 1A is pushed down against the magnetic force of the magnets 81A and 82A to open the first member 10A and the second member 20A. Since the jewelry fastener 1A does not bias the first member 10A and the second member 20A by the biasing member, the open state is maintained without continuously pressing the operation portion 26A. At this time, by setting the X2 direction upward, the state shown in FIG. 13 is obtained, and the open state is easily maintained.

[0111] After the jewelry fastener 1A is opened, the hook portion 12A is hooked on the opening 55A of the suspended ring 53A. This hooking operation is very simple because it only involves positioning the concave portion 13A of the hook portion 12A at the edge portion 56A of the ring 53A. After the hook portion 12A is hooked on the edge portion 56A of the ring 53A, once the hand is released from the jewelry fastener 1A, with the jewelry fastener 1A suspended as shown in FIG. 13, the second member 20A is rotated toward the first member 10A. Thereby, the connection operation between the jewelry fastener 1A and the ring 53A is completed. Note that the jewelry fastener 1A in the state shown in FIG. 13 is very stably suspended from the ring 53A, so even if the hand is once released from the jewelry fastener 1A, the hook portion 12A does not come off the ring 53A and fall off.

[0112] Note that the above-described connection operation is an example, and the connection operation of the jewelry fastener 1A is also possible by other methods. For example, the ring 53A as the second target member may be pinched with one hand, the jewelry fastener 1A may be pinched with the other hand, and the two may be connected. Also in this case, the connection operation can be performed very easily.

[0113] Next, an example of the separation operation by the above-described jewelry fastener 1A will be described. Here too, the operation when separating the jewelry fastener 1A from the ring 53A with the ring 53A of the linear member 50A as the second target member will be described.

[0114] First, pinch the vicinity of the attachment portion 30A of the jewelry fastener 1A with a finger and push down the operation portion 26A to open the first member 10A and the second member 20A. Then, while maintaining this open state, let the edge portion 56A of the ring 53A escape from the recess 13A of the hooking portion 12A. In this case, the ring 53A may be in a hanging state as shown in FIG. 13, or may be placed on an object such as clothing. When the ring 53A is in a hanging state, by an operation reverse to the connection operation, the recess 13A of the hooking portion 12A is separated from the edge portion 56A of the ring 53A. Also, when the ring 53A is placed on an object, by gently lifting the opened jewelry fastener 1A so that the hooking portion 12A is positioned on the upper side as shown in FIG. 13, the edge portion 56A remaining in the recess 13A moves to the lower side and separates from the recess 13A. Thereby, the separation of the jewelry fastener 1A and the ring 53A is completed.

[0115] Note that the above-described separation operation is an example, and the separation operation of the jewelry fastener 1A can also be performed by other methods. For example, you may pinch the ring 53A as the second target member with one hand, pinch the jewelry fastener 1A with the other hand, and separate the two.

[0116] As described above, also in the jewelry fastener 1A according to the second embodiment, by having the same configuration as the jewelry fastener 1 according to the first embodiment already described, it is possible to obtain the same effects.

[0117] In the jewelry fastener 1A according to the second embodiment, since magnets (81A, 82A) are used as means for maintaining the closed state, it is possible to omit the biasing member (torsion coil spring 60) in the jewelry fastener 1 according to the first embodiment, and the configuration can be simplified.

[0118] In the above-described first and second embodiments, an example where the hooking portions (10, 10A) are bent in a hook shape has been given. However, the shape of the hooking portion of the present disclosure is not limited to these examples. That is, the shape of the hooking portion is at least a shape having a concave portion, and any other shape may be used as long as it can be inserted together with the tip portion into a reference circle corresponding to the opening of the second target member.

[0119] Also, in the above-described first and second embodiments, an example where the tip portions (23, 23A) are bent in a hook shape along the outer surface of the hooking portions (10, 10A) has been given. However, the shape of the tip portion 23 of the present disclosure is not limited to these examples. That is, the shape of the tip portion may be any other shape as long as it can be inserted together with the hooking portion into a reference circle (5, 5A) corresponding to the opening of the second target member. Further, the tip portion may be in contact with the hooking portion in the closed state or may not be in contact.

[0120] The fastener for ornaments of the present disclosure is applicable to ornaments (such as bracelets, necklaces, pendants, anklets, etc.) including a linear member as exemplified in the above embodiments, and is also applicable to various ornaments (such as brooches, earrings, piercings, hairpins, necktie pins, etc.) that do not include a linear member. Further, as exemplified in the above embodiments, the fastener for ornaments of the present disclosure may connect members included in the ornament (in the above example, the ends of the linear member), may connect the ornament and other objects (such as clothes, personal items, etc.), or may connect a plurality of ornaments to each other.

[0121] Also, in each of the above-described embodiments, the fastener for ornaments is a completed assembled product. However, the present disclosure is not limited to these embodiments. That is, the embodiments of the present disclosure also include an assembly set for assembling the fastener for ornaments. For example, the assembly set of the fastener 1 for ornaments according to the first embodiment includes a first member 10, a second member 20, a mounting portion 30 attached to a first target member, and a torsion coil spring 60 as a biasing member (FIGS. 3B and 6A). When the fastener 1 for ornaments includes means (such as the locking portion 70 in FIG. 10) for maintaining the closed state between the first member 10 and the second member 20, the assembly set of the fastener 1 for ornaments may not include a biasing member (torsion coil spring 60).

[0122] The following describes Appendices 1 to 15 related to the aspects of the present disclosure.

[0123] [Appendix 1] A fastener (1, 1A) for ornaments that separably connects a first target member and a second target member, a first member (10, 10A) and a second member (20, 20A), a mounting portion (30, 30A) attached to the first target member, and a connecting portion (40, 40A) that rotatably connects the first member (10, 10A) and the second member (20, 20A), wherein the mounting portion (30, 30A) is provided on the first member (10, 10A) or the connecting portion (40, 40A), the first member (10, 10A) includes a hooking portion (12, 12A) that is hooked on an opening of the second target member, the hooking portion (12, 12A) has a recess (13, 13A) recessed in a first direction (X2) away from the mounting portion (30, 30A), the first member (10, 10A) and the second member (20, 20A) are in an open state or a closed state by rotating at the connecting portion (40, 40A), in the open state, a gap (2, 2A) is formed between the first member (10, 10A) and the second member (20, 20A), the gap (2, 2A) in the open state forms a passage for an edge portion of the second target member facing the opening to enter and exit the recess (13, 13A) of the hooking portion (12, 12A), In the closed state, entry and exit of the edge portion into and from the recess (13, 13A) through the gap (2, 2A) are impossible. The second member (20, 20A) includes a tip portion (23, 23A) that moves on an arc-shaped orbit (3, 3A) with respect to the first member (10, 10A) by rotating the first member (10, 10A) and the second member (20, 20A). The arc-shaped orbit (3, 3A) is an orbit (3, 3A) that passes through a virtual reference circle (5, 5A) in the closed state. The reference circle (5, 5A) has a center at a position away from the deepest part (14, 14A) of the recess (13, 13A) in the first direction (X2), is located on a plane parallel to the rotation axis (AX) of the first member (10, 10A) and the second member (20, 20A) and the first direction (X2), and is a circle that the engaging portion (12, 12A) contacts from the inside. In the closed state, at least a part of the tip portion (23, 23A) penetrates the reference circle (5, 5A). Fastener for ornaments (1, 1A).

[0124] [Appendix 2] The tip portion (23, 23A) is located at a position away from the recess (13, 13A) in the first direction (X2) within the reference circle (5, 5A) when in the closed state. Fastener for ornaments (1, 1A) according to Appendix 1.

[0125] [Appendix 3] The recess (13, 13A) is recessed in the first direction (X2) perpendicular to the rotation axis (AX). The rotation axis (AX) is located at a position away from the recess (13, 13A) in the opposite direction (X1) of the first direction (X2). Fastener for ornaments (1, 1A) according to Appendix 2.

[0126] [Appendix 4] The tip portions (23, 23A) have a leading portion (24, 24A) that is positioned at the leading end of the arc-shaped orbit (3, 3A) when changing from the open state to the closed state. In the leading portion (24, 24A) of the tip portion (23, 23A), the portion closest to the rotation axis (AX) is separated from the outer surface of the engaging portion (12, 12A) on the first direction (X2) side in the closed state. The jewelry fastener (1, 1A) according to Addendum 3.

[0127] [Addendum 5] In the closed state, when the engaging portion (12, 12A) of the first member (10, 10A) contacts the second member (20, 20A), the rotation of the second member (20, 20A) with respect to the first member (10, 10A) is restricted. The jewelry fastener (1, 1A) according to any one of Addenda 2 to 4.

[0128] [Addendum 6] The engaging portion (12, 12A) has an end portion (121, 121A) that is inserted into the opening of the second target member, and bends toward the second member (20, 20A) as it approaches the end portion (121, 121A) when viewed from a direction parallel to the rotation axis (AX). The tip portions (23, 23A) have a leading portion (24, 24A) that is positioned at the leading end of the arc-shaped orbit (3, 3A) when changing from the open state to the closed state, and bend toward the first member (10, 10A) as they approach the leading portion (24, 24A) of the tip portions (23, 23A) when viewed from a direction parallel to the rotation axis (AX). The jewelry fastener (1, 1A) according to any one of Addenda 2 to 5.

[0129] [Addendum 7] The second member (20, 20A) includes a pair of side walls (25) that face each other in a direction parallel to the rotation axis (AX). In the closed state, at least a part of the first member (10, 10A) is located between the pair of side walls (25) and extends in a direction along a plane perpendicular to the rotation axis (AX). The jewelry fastener (1, 1A) according to any one of Appendices 2 to 6.

[0130] [Appendix 8] In the closed state, the first member (10, 10A) and the second member (20, 20A) form an internal space (4, 4A) that penetrates in a direction parallel to the rotation axis (AX). The internal space (4, 4A) is a closed region surrounded by the first member (10, 10A) and the second member (20, 20A) when viewed in a direction parallel to the rotation axis (AX). The concave portions (13, 13A) of the hooking portions (12, 12A) and a part of the surface of the second member (20, 20A) face the internal space (4, 4A). In the closed state, the surface of the second member (20, 20A) facing the internal space (4, 4A) includes a first portion (S1, S3, S4) and a second portion (S2, S5). The first normal vectors (N1, N3, N4), which are the normal vectors at each position of the first portion (S1, S3, S4) when viewed in a direction parallel to the rotation axis (AX) in the closed state and are the normal vectors in the direction of pushing the second member (20, 20A), include a component in the direction of the open state. The second normal vectors (N2, N5), which are the normal vectors at each position of the second portion (S2, S5) when viewed in a direction parallel to the rotation axis (AX) in the closed state and are the normal vectors in the direction of pushing the second member (20, 20A), include a component in a direction opposite to the direction of the open state. When viewed in a direction parallel to the rotation axis (AX) in the closed state, the length of the first portion (S1, S3, S4) is shorter than the length of the second portion (S2, S5). The jewelry fastener (1, 1A) according to any one of Appendices 2 to 7.

[0131] [Appendix 9] The first member (10, 10A) includes a first base portion (11, 11A) connected to the hooking portion (12, 12A). When viewed from a direction parallel to the rotation axis (AX), the concave portion (13, 13A) is arcuately curved in the first direction (X2) between one end (15) connected to the first base portion (11, 11A) and the other end (16) away from the first base portion (11, 11A). When viewed from a direction parallel to the rotation axis (AX), the position of the innermost part (14, 14A) of the concave portion (13, 13A) in a direction perpendicular to the first direction (X2) is closer to the one end (15) than the middle between the one end (15) and the other end (16). The jewelry fastener (1, 1A) according to any one of Appendices 2 to 8.

[0132] [Appendix 10] The second member (20, 20A) includes a second base portion (21, 21A) connected to the tip portion (23, 23A). When changing from the open state to the closed state, the tip portion (23, 23A) has a leading portion (24, 24A) located at the leading edge of the arcuate orbit (3, 3A), and the width in the direction parallel to the rotation axis (AX) becomes narrower as going from the second base portion (21, 21A) side to the leading portion (24, 24A) side. The jewelry fastener (1, 1A) according to any one of Appendices 2 to 9.

[0133] [Appendix 11] The second member (20, 20A) includes an operation portion (26, 26A) protruding in a direction away from the rotation axis (AX). The jewelry fastener (1, 1A) according to any one of Appendices 2 to 10.

[0134] [Appendix 12] It has a biasing member (60) that generates a biasing force for rotating the first member (10) and the second member (20) in a direction of changing from the open state to the closed state. The jewelry fastener (1) according to any one of Appendices 2 to 11.

[0135] [Appendix 13] The first member (10, 10A), the second member (20, 20A), and the attachment portion (30, 30A) provided on the first member (10, 10A) in the jewelry fastener (1, 1A) according to any one of Appendices 1 to 11 An assembly set of jewelry fasteners

[0136] [Appendix 14] Further comprising the biasing member (60) in the jewelry fastener (1) according to Appendix 12 An assembly set of jewelry fasteners according to Appendix 13

[0137] [Appendix 15] A piece of jewelry comprising the jewelry fastener (1, 1A) according to any one of Appendices 1 to 12

Explanation of Reference Signs

[0138] 1, 1A... Fastener for ornaments, 2, 2A... Gap, 3, 3A... Track, 4, 4A... Internal space, 5, 5A... Reference circle, 6, 6A... Center, 10, 10A... First member, 11, 11A... First base, 12, 12A... Hanging portion, 13, 13A... Recess, 14, 14A... Rearmost part, 15... One end, 16... The other end, 17, 17A... Outer surface, 18, 18A... Bottom surface, 19, 19A... Side wall, 101, 101A, 102, 103... Inner surface, 20, 20A... Second member, 21, 21A... Second base, 23, 23A... Tip portion, 24, 24A... Leading part, 25... Side wall, 26, 26A... Operating portion, 27, 27A... Edge, 28... Groove, 201A... Bottom surface, 202A... Side edge, 30, 30A... Mounting portion, 31, 31A... Hole, 32A... Arm portion, 33A... Intermediate portion, 40, 40A... Connecting portion, 41, 41A... Shaft, 42, 42A, 43A... Shaft support hole, 50, 50A... Linear member, 51, 51A, 52, 52A... End portion, 53, 53A, 54A... Ring, 55, 55A... Opening, 56, 56A... Edge, 57, 57A... Disk portion, 58, 58A... Connecting member, 60... Torsion coil spring, 61... Coil portion, 62, 63... Arm portion, 70... Locking portion, 71... Locking convex portion, 72... Locking concave portion, 81A, 82A... Magnet, AX... Rotation axis, S1, S3, S4... First part, S2, S5... Second part, N1, N3, N4... First normal vector, N2, S5... Second normal vector

Claims

1. A fastener for ornaments that detachably connects a first target member and a second target member, a first member and a second member, a mounting portion attached to the first target member, a connecting portion that rotatably connects the first member and the second member, and a biasing member, wherein the mounting portion is provided on the first member or the connecting portion, the first member includes a hooking portion that is hooked on an opening of the second target member, the hooking portion has a recess recessed in a first direction away from the mounting portion, the first member and the second member are in an open state or a closed state by rotating at the connecting portion, in the open state, a gap is formed between the first member and the second member, the gap in the open state forms a passage for the edge portion facing the opening of the second target member to enter and exit the recess of the hooking portion, in the closed state, the edge portion cannot enter and exit the recess through the gap, the second member includes a tip portion that moves on an arc orbit with respect to the first member by rotating the first member and the second member, the arc orbit is an orbit that passes through a virtual reference circle in the closed state, the reference circle has a center at a position away from the innermost part of the recess in the first direction in the first direction, is located on a plane parallel to the rotation axis of the first member and the second member and the first direction, and is a circle that the hooking portion contacts from the inside, at least a part of the tip portion penetrates the reference circle in the closed state, the tip portion is located at a position away from the recess in the first direction inside the reference circle when in the closed state, the biasing member generates a biasing force that rotates the first member and the second member in a direction from the open state to the closed state, the first member and the second member in the open state automatically change to the closed state by the biasing force of the biasing member, during the process of the first member and the second member changing to the closed state or the open state and in the closed state, the tip portion penetrating the reference circle is not locked by the hooking portion, A fastener for ornaments.

2. the recess is recessed in the first direction perpendicular to the rotation axis, the rotation axis is located at a position away from the recess in the opposite direction of the first direction, The fastener for ornaments according to claim 1.

3. The tip portion has a leading portion that is located at the leading end of the arc-shaped trajectory when changing from the open state to the closed state, In the leading portion of the tip portion, the portion closest to the rotation axis is separated from the outer surface of the engaging portion on the first direction side in the closed state. The fastener for ornaments according to claim 2.

4. The engaging portion has an end portion that is inserted into the opening of the second target member, and when viewed from a direction parallel to the rotation axis, it bends toward the second member side as it approaches the end portion. The tip portion has a leading portion that is located at the leading end of the arc-shaped trajectory when changing from the open state to the closed state, and when viewed from a direction parallel to the rotation axis, it bends toward the first member side as it approaches the leading portion of the tip portion. The fastener for ornaments according to any one of claims 1 to 3.

5. The second member includes a pair of side walls facing each other in a direction parallel to the rotation axis. In the closed state, at least a part of the first member is located between the pair of side walls and extends in a direction along a plane perpendicular to the rotation axis. The fastener for ornaments according to any one of claims 1 to 4.

6. The first member and the second member form an internal space that penetrates in a direction parallel to the rotation axis in the closed state. The internal space is a closed region surrounded by the first member and the second member when viewed from a direction parallel to the rotation axis. The concave portion of the engaging portion and a part of the surface of the second member face the internal space. The surface of the second member facing the internal space in the closed state includes a first portion and a second portion. The first normal vector, which is the normal vector at each position of the first portion when viewed from a direction parallel to the rotation axis in the closed state and is the normal vector in the direction of pushing the second member, includes a component that goes in the direction of becoming the open state. The second normal vector, which is the normal vector at each position of the second portion when viewed from a direction parallel to the rotation axis in the closed state and is the normal vector in the direction of pushing the second member, includes a component that goes in the direction opposite to the direction of becoming the open state. When viewed from a direction parallel to the rotation axis in the closed state, the length of the first portion is shorter than the length of the second portion. The fastener for ornaments according to any one of claims 1 to 5.

7. The first member includes a first base portion connected to the engaging portion. The concave portion is curved in an arc shape in the first direction between one end connected to the first base portion and the other end away from the first base portion when viewed from a direction parallel to the rotation axis. The position of the innermost part of the concave portion in the direction perpendicular to the first direction is closer to the one end than the middle between the one end and the other end when viewed from a direction parallel to the rotation axis. The fastener for ornaments according to any one of claims 1 to 6.

8. The second member includes a second base portion connected to the tip portion. The tip portion has a leading portion located at the leading end of the arc orbit when changing from the open state to the closed state, and the width in the direction parallel to the rotation axis becomes narrower from the second base portion side toward the leading portion side. The fastener for ornaments according to any one of claims 1 to 7.

9. The second member includes an operation portion protruding in a direction away from the rotation axis. The fastener for ornaments according to any one of claims 1 to 8.

10. An assembly set for assembling the fastener for ornaments according to any one of claims 1 to 9, the assembly set for the fastener for ornaments comprising a first member, a second member, a mounting portion provided on the first member, a connecting portion rotatably connecting the first member and the second member, and a biasing member.

11. An ornament comprising the fastener for ornaments according to any one of claims 1 to 9.

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