Buckle member and method for manufacturing same

Abstract

Provided is a buckle member in which it is desirable that a magnet or a magnetic body is difficult to visually recognize from the outside of the buckle member when the magnet or the magnetic body is embedded in the buckle member. A buckle member (1, 2) is provided with: an injection-molded part (3); and at least one magnet or magnetic body (M1, M2) held by the injection molded part (3). The injection-molded part (3) is molded so that the magnet or magnetic body (M1, M2) is partially exposed at least in a first region (R1) of the magnet or magnetic body (M1, M2), the first region (R1) including a first partial region (E1) and a second partial region (E2) adjacent to a first surface (8d) and a second surface (81) of the magnet or magnetic body (M1, M2), the first surface (8d) and the second surface (81) being adjacent to each other; and a first edge (35) between the first partial region (E1) and the second partial region (E2) adjacent to each other.

Description

[0001] Technical Area

[0002] The present disclosure relates to a buckle component and a method for manufacturing the same. Background Art

[0003] Japanese Utility Model Registration No. 3200327 discloses a buckle including a buckle body and a locking member connected thereto. The buckle body has a built-in magnet, and the locking member also has a built-in magnet, and the two can be magnetically engaged. In the buckle body, a rotating member is rotatably arranged on a base. A second locking member is arranged at the top end of the rotating member. A first locking member that is engaged with the second locking member is arranged on the connecting member.

[0004] Japanese Utility Model Publication No. 59-191912 discloses a buckle in which a female connection portion with an inclination of 45° to 85° is provided on a female part, and a male connection portion with an inclination of 45° to 85° is provided on a male part. Japanese Utility Model Publication No. 7-31684 discloses a buckle similar to Patent Document 1. Summary of the invention

[0005] When a magnet or a magnetic body is embedded in a buckle component, it is desired that the magnet or the magnetic body be difficult to be visually recognized from the outside of the buckle component. The inventor of the present application has conceived the present invention which is different from the general situation.

[0006] One embodiment of the present disclosure relates to a buckle component, which includes: an injection molded portion, and at least one magnet or magnetic body held by the injection molded portion. The injection molded portion is formed to partially expose the magnet or magnetic body at least in a first region of the magnet or magnetic body. In an exemplary form, the first region includes: a first local region and a second local region adjacent to the first and second faces of the magnet or magnetic body; and a first edge between the adjacent first local region and the second local region.

[0007] Another embodiment of the present disclosure relates to a method for manufacturing a buckle component having at least one magnet or magnetic body, including: a step of configuring at least one magnet or magnetic body on a plurality of supporting protrusions disposed in a first half-cavity of a fixed mold; and a step of supplying molten resin to the molding cavity in a state where the magnet or magnetic body is configured in a molding cavity including the first half-cavity and the second half-cavity of a movable mold. The plurality of supporting protrusions include a first supporting protrusion that contacts the magnet or magnetic body at least throughout the entire area of ​​the first region of the magnet or magnetic body. In an exemplary form, the first region includes: a first local region and a second local region adjacent to the first and second faces of the magnet or magnetic body; and a first edge between the adjacent first local region and the second local region.

[0008] Effects of the Invention

[0009] According to one method of the present disclosure, by insert-molding a magnet or a magnetic body in the resin portion of a buckle component, the magnet or the magnetic body can be prevented from falling off, and the positioning structure of the magnet or the magnetic body in the mold device for injection molding can be simplified and the service life can be prolonged by the shape of the injection molding portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a perspective view of a buckle according to one aspect of the present disclosure, in which a first buckle component and a second buckle component are in a coupled state.

[0011] Figure 2 This is a perspective view of a buckle according to one embodiment of the present disclosure, in which a first buckle component and a second buckle component are separated. The first magnet and the second magnet are also shown for reference.

[0012] Figure 3 It is a schematic plan view of the buckle in a state where the first buckle component and the second buckle component are coupled.

[0013] Figure 4 It is along Figure 3 A schematic cross-sectional view of the centerline of the buckle is shown.

[0014] Figure 5 yes Figure 4 Schematic cross-sectional view of the first buckle component shown.

[0015] Figure 6 yes Figure 4 Schematic cross-sectional view of the second buckle component shown.

[0016] Figure 7 It is a top view of the second buckle component.

[0017] Figure 8 A front view of the second buckle component.

[0018] Fig. 9 It is a bottom view of the second buckle component.

[0019] Fig.10 It is a schematic partial enlarged perspective view of the second buckle component.

[0020] Fig.11 It is a top view schematically showing the first buckle component, showing the female groove, male part and bottom in partial section.

[0021] Fig.12 This is a front view of the first buckle component.

[0022] Fig.13 It is a bottom view of the first buckle component.

[0023] Fig.14 It is a schematic partial enlarged perspective view of the first buckle component.

[0024] Fig.15 It is a schematic perspective view of the first buckle component.

[0025] Fig.16 It is a schematic diagram which shows the process of connecting the first buckle member and the second buckle member.

[0026] Fig.17 It is a schematic diagram which shows the process of connecting the first buckle member and the second buckle member.

[0027] Fig.18 It is a schematic diagram which shows the process of connecting the first buckle member and the second buckle member.

[0028] Fig.19 It is a schematic diagram which shows the state which completed the connection of the 1st buckle member and the 2nd buckle member.

[0029] Fig. 20 This is a schematic diagram of a mold device for manufacturing buckle components.

[0030] Fig.21 This is a schematic diagram regarding the arrangement of the support protrusions and the pressing protrusions for the second magnet in the mold device.

[0031] Fig. 22 This is a schematic diagram regarding the arrangement of the supporting protrusions and the pressing protrusions for the first magnet in the mold device.

[0032] Description of Reference Numerals

[0033] 1.2 Buckle parts

[0034] 3Injection molding department

[0035] 9 Buckles

[0036] 35 1st Edge

[0037] K1~K4 Window

[0038] M1, M2 magnets

[0039] R1~R3 Area 1 to Area 3 DETAILED DESCRIPTION

[0040] Various embodiments and features are described below with reference to the accompanying drawings. A person skilled in the art can combine the various embodiments and / or the various features without excessive explanation, and can also understand the synergistic effect brought about by the combination. In principle, repeated descriptions between the embodiments are omitted. The main purpose of referring to the accompanying drawings is to describe the invention, and the drawings are simplified for the convenience of drawing. Each feature is not only valid for the buckle components disclosed in this application, but can be understood as a general feature that is also applicable to various other buckle components not disclosed in this specification.

[0041] Reference Figures 1 to 15 For the sake of explanation, Figure 1 As shown in FIG. 1 , three-dimensional coordinates of the width direction D1, thickness direction D2, and length direction D3 are set for the buckle 9. Figure 2 As shown, a first coordinate C1 is set for the first buckle component 1, and a second coordinate C2 is set for the second buckle component 2. The first coordinate C1 sets the direction in which the first buckle component 1 faces the second buckle component 2 as the front. The double-headed arrow between RL indicates the left-right direction consistent with the width direction of the first buckle component 1. The double-headed arrow between FB indicates the front-back direction consistent with the length direction of the first buckle component 1. The double-headed arrow between UD indicates the up-down direction consistent with the thickness direction of the first buckle component 1. The second coordinate C2 sets the direction in which the second buckle component 2 faces the first buckle component 1 as the front. The double-headed arrow between RL indicates the left-right direction consistent with the width direction of the second buckle component 2. The double-headed arrow between FB indicates the front-back direction consistent with the length direction of the second buckle component 2. The double-headed arrow between UD indicates the up-down direction consistent with the thickness direction of the second buckle component 2. The width direction of the first buckle component 1 and the width direction of the second buckle component 2 are parallel to the width direction D1 of the buckle 9.

[0042] The buckle 9 includes a first buckle component 1 and a second buckle component 2 that are separably coupled. The first buckle component 1 and the second buckle component 2 are configured to be magnetically coupled, so that the coupling operation of the first buckle component 1 and the second buckle component 2 is automated or semi-automated. Figure 1As shown, the buckle 9 has a width direction D1, a thickness direction D2, and a length direction D3, and is typically a thin device installed on the first buckle component 1 and the second buckle component 2, the width of which is larger than the specified width of the belt cord. The first buckle component 1 and the second buckle component 2 are respectively injection-molded products of resin, including: an injection-molded portion 3, and at least one magnet M1, M2 held by the injection-molded portion 3. More specifically, the magnets M1, M2 are buried in the injection-molded portion 3 by insert molding, so that the magnets M1, M2 can be prevented from falling off from the injection-molded portion 3. Moreover, the shape of the injection-molded portion 3 described later can promote the simplification and longevity of the positioning structure of the mold device for manufacturing the first buckle component 1 and the second buckle component 2. In addition, the resin material of the buckle component has magnetic conductivity, such as polyacetal.

[0043] In order to manufacture the first buckle component 1 and the second buckle component 2, it is possible to use Fig. 20 A mold device 100 is schematically shown. The mold device 100 includes a fixed mold 101 and a movable mold 102, and the movable mold 102 can move up and down along the vertical direction relative to the fixed mold 101. In addition, the fixed mold 101 has a first half cavity 103, and the movable mold 102 has a second half cavity 104. When the fixed mold 101 and the movable mold 102 are molded together, a molding cavity 105 is formed by the first half cavity 103 and the second half cavity 104. In a state where a magnet or a magnetic body M is arranged in the molding cavity 105, a molten resin is supplied to the molding cavity 105, and the resin is solidified by cooling the mold device 100 (for example, a refrigerant is allowed to flow in the refrigerant flow path in the fixed mold 101 and / or the movable mold 102). The first buckle component 1 and the second buckle component 2 can be manufactured by such a method. In order to reduce the influence of demagnetization of the magnet due to heat received during injection molding, it is preferred to use a magnet of larger size, but it is not limited to this. In addition, as peripheral devices of the mold device 100, such as an injection device, a mold clamping device, etc., well-known devices can be used, and detailed descriptions thereof are omitted.

[0044] like Figures 1 to 6 As shown, the first buckle component 1 includes a first strap mounting portion 91, a first engaging portion 93 connected to the first strap mounting portion 91, and a first magnet M1. The second buckle component 2 includes a second strap mounting portion 92, a second engaging portion 94 connected to the second strap mounting portion 92, and a second magnet M2. The first engaging portion 93 is a receiving portion 31, and the second engaging portion 94 is an insertion portion 32 inserted into the receiving portion 31, but is not limited thereto and may have other structures. The second buckle component 2 may selectively include a stop wall 68, and a notch 69 may be formed in the receiving portion 31 of the first buckle component 1 to avoid interference with the stop wall 68.

[0045] When the first buckle member 1 and the second buckle member 2 are in the engaged state (see Figure 1 ), even if the second buckle component 2 is pulled in the direction away from the first buckle component 1 in the length direction D3 of the buckle 9, the combination of the two can be maintained. The reason is that the male parts 4, 4' of the second buckle component 2 are inserted into the female grooves 5, 5' of the first buckle component 1. In addition or alternatively, the male parts 6, 6' of the first buckle component 1 are inserted into the female grooves 7, 7' of the second buckle component 1. The same is true even when the first buckle component 1 is pulled in the direction away from the second buckle component 2. The male parts 4, 4', 6, 6' can be protruding parts in the thickness direction of the buckle component. The female grooves 5, 5', 7, 7' can be recessed parts that accommodate the male parts 4, 4', 6, 6'. It is also possible to omit one of the upper and lower male parts in the buckle component, and the same applies to the female grooves.

[0046] The first buckle component 1 and the second buckle component 2 can be magnetically joined along a direction different from the insertion direction of the male portion 4, 4', 6, 6' into the female groove 5, 5', 7, 7', more specifically, along the length direction D3 of the buckle 9. In some cases, the first buckle component 1 includes a first magnet M1 (for example, a permanent magnet such as a neodymium magnet), and the second buckle component 2 includes a second magnet M2 (for example, a permanent magnet such as a neodymium magnet). When the first buckle component 1 and the second buckle component 2 are located at a relatively close position, the first buckle component 1 and the second buckle component 2 approach each other according to the magnetic attraction between the first magnet M1 and the second magnet M2, and are automatically joined as described later. One or both of the first magnet M1 and the second magnet M2 may also be a magnet with a yoke.

[0047] As an alternative to the form in which the first buckle component 1 and the second buckle component 2 each include a magnet, the following form can also be adopted: one of the first buckle component 1 and the second buckle component 2 includes a magnet (for example, a neodymium magnet, etc.), and the other includes a magnetic body that can be magnetically bonded to the magnet (for example, a ferromagnetic body such as iron, nickel, cobalt, or an alloy thereof). When the first buckle component 1 and the second buckle component 2 are located in a relatively close position, the magnetic body is attracted by the magnetic force of the magnet, and the same effect can be obtained. It is also possible to install a plurality of magnets and / or magnetic bodies in the first buckle component 1, and the same is true for the second buckle component 2.

[0048] The first buckle component 1 (e.g., the first engaging portion 93 thereof) includes: a female groove 5, 5' extending along the width direction of the buckle component; and a male portion 6, 6' adjacent to the female groove 5, 5' on a side of the female groove 5, 5' away from the first strap cord mounting portion 91 (more specifically, the front side of the first buckle component 1) (see Figure 4The second buckle component 2 (or the second engaging portion 94) includes: a female groove 7, 7', which extends along the width direction of the buckle component; and a male portion 4, 4', which is adjacent to the female groove 7, 7' on the side of the female groove 7, 7' away from the second belt cord mounting portion 92 (more specifically, the front side of the second buckle component 2) (refer to Figure 4 ).

[0049] Preferably, the male portion 4, 4', 6, 6' is a protrusion extending in the width direction of the buckle component, for example, parallel to or obliquely relative to the width direction of the buckle component, thereby suggesting the connection direction of the first buckle component 1 and the second buckle component 2, which can promote proper operation of the buckle 9. The male portion 4 and the male portion 4' protrude in opposite directions up and down, and the male portion 6 and the male portion 6' are the same. The female grooves 5, 5', 7, 7' extend in the shape of long strips along the width direction of the buckle component, for example, parallel to or obliquely relative to the width direction of the buckle component. The female groove 5 and the female groove 5' are recessed in opposite directions up and down, and the female groove 7 and the female groove 7' are the same. When the male portion and the female groove are inclined, it is possible to prevent the male portion from easily disengaging from the female groove.

[0050] like Figure 7 As shown, the male portions 4, 4' form an acute angle θ1 with respect to the axis L1 which coincides with the width direction of the second buckle member 2. The same is true for the female grooves 7, 7'. Fig.11 As shown, the male portion 6, 6' forms an acute angle θ4 with respect to the axis L4 that coincides with the width direction of the first buckle member 1. The same is true for the female grooves 5, 5'. θ1 = θ4 can be satisfied. θ1, θ4 can be an acute angle of less than 45°, less than 30°, less than 25°, or less than 20°.

[0051] The male portion 4, 4' includes a first end portion 41 and a second end portion 42, and can be tilted in a manner close to the second strap cord mounting portion 92 (i.e., to the rear of the second buckle component 2) in accordance with the extension from the first end portion 41 toward the second end portion 42. The male portion 6, 6' includes a first end portion 61 and a second end portion 62, and can be tilted in a manner close to the first strap cord mounting portion 91 (i.e., to the rear of the first buckle component 1) in accordance with the extension from the first end portion 61 toward the second end portion 62.

[0052] The male parts 4, 4' and the male parts 6, 6' are arranged complementary to each other in the width direction D1 of the buckle 9. That is, the male part 6 is arranged on the right side in the first buckle component 1, and the male part 4 is arranged on the left side in the second buckle component 2, so that Figure 2As shown, when the first buckle component 1 and the second buckle component 2 face each other, the male portion 4 and the male portion 6 are not opposite to each other or are only partially opposite to each other in the longitudinal direction D3 of the buckle 9. Therefore, even if the first buckle component 1 and the second buckle component 2 are close to each other (for example, due to the magnetic attraction between the first magnet M1 and the second magnet M2), it is possible to suppress the male portion 4 and the male portion 6 from colliding. The same is true for the male portion 4' and the male portion 6'.

[0053] The male portion 4, 4' (preferably the second end portion 42 thereof) includes: a guide surface 45 extending along an axis L3 forming an acute angle θ2 with an axis L2 parallel to the length direction of the male portion 4, 4'; a stop surface 46 located behind the guide surface 45 and extending along the axis L2; ​​and a rounded edge 47 formed between the guide surface 45 and the stop surface 46 (see Figure 7 ). In addition, the axis L2 is consistent with the insertion direction of the male part 4, 4' into the female groove 5, 5'. The guide surface 45 is the side surface of the male part 4, 4' (the second end 42), and the stop surface 46 is the rear surface of the male part 4, 4'.

[0054] The male portion 6, 6' (preferably the second end portion 62 thereof) includes: a guide surface 65 extending along an axis L6 forming an acute angle θ5 with an axis L5 parallel to the length direction of the male portion 6, 6'; a stop surface 66 located behind the guide surface 65 and extending along the axis L5; and a rounded edge 67 formed between the guide surface 65 and the stop surface 66 (see Fig.11 ). In addition, the axis L5 is consistent with the insertion direction of the male part 6, 6' into the female groove 7, 7'. The guide surface 65 is the side surface of the male part 6, 6' (the second end 62), and the stop surface 66 is the rear surface of the male part 6, 6'.

[0055] As described above, the male parts 4, 4', 6, 6' are provided with guide surfaces 45, 65, so that the male parts 4, 4' and the male parts 6, 6' can avoid each other, thereby ensuring smooth and easy initial engagement of the first buckle component 1 and the second buckle component 2. Preferably, θ2, θ5 are equal to an angle within the range of 25° to 75° or within the range of 35° to 65°.

[0056] The female groove 5, 5' includes an introduction end 51 and an opposite end 52 on the opposite side of the introduction end 51. The female groove 5, 5' extends obliquely between the introduction end 51 and the opposite end 52, and in detail, is inclined in a manner that is farther away from the rear end of the first strap cord mounting portion 91 than it is away from the introduction end 51 toward the opposite end 52 (i.e., toward the front of the first buckle component 1). The introduction end 51 is an entrance of the male part 4, 4' inserted into the female groove 5, 5', and is an exit of the male part 4, 4' pulled out of the female groove 5, 5'. The second end 62 of the male part 6, 6' is provided adjacent to the front of the introduction end 51. It is not necessary to insert the male part 4, 4' into the female groove 5, 5' in a manner that the second end 42 of the male part 4, 4' reaches the opposite end 52 of the female groove 5, 5'. The opposite end 52 may be a closed end closed by the side plate 83, but is not limited thereto. In the example shown in the figure, the female grooves 5 and 5' have a width W5 defined by the stopper surface 66 (rear surface) of the male portion 6 and 6' and the bottom surface 84a of the bottom portion 84 described later. The bottom surface of the female groove 5 coincides with the bottom surface of the upper plate 81 described later, and the bottom surface of the female groove 5' coincides with the upper surface of the lower plate 82 described later.

[0057] The female groove 7, 7' includes an introduction end 71 and an opposite end 72 on the opposite side of the introduction end 71. The female groove 7, 7' extends obliquely between the introduction end 71 and the opposite end 72, and in detail, is inclined in a manner that is farther away from the rear end of the second strap cord mounting portion 92 (i.e., toward the front of the first buckle component 1) than the introduction end 71 is farther away from the opposite end 72. The introduction end 71 is an entrance of the male part 6, 6' inserted into the female groove 7, 7', and an exit of the male part 6, 6' pulled out of the female groove 7, 7'. The second end 42 of the male part 4, 4' is provided adjacent to the front of the introduction end 71. It is reiterated that the male part 6, 6' does not need to be inserted into the female groove 7, 7' in a manner that the second end 62 of the male part 6, 6' reaches the opposite end 72 of the female groove 7, 7'. The opposite end 72 may be a closed end closed by the stop wall 68, but is not limited thereto.

[0058] The first strap mounting portion 91 is configured to define at least one opening for inserting straps, and includes a left wall 26, a right wall 27, and a rod 28. The rod 28 extends in the width direction of the first buckle component 1, and connects the rear ends of the left wall 26 and the right wall 27. The second strap mounting portion 92 is configured to be able to adjust the length of the straps. Typically, the second strap mounting portion 92 includes a frame portion that supports one or more rods 21 extending in parallel with the width direction of the second buckle component 2, and includes a left wall 22, a right wall 23, a front wall 24, and a rear wall 25 in addition to the rod 21. The rod 21 is supported by the left wall 22 and the right wall 23, and the space between the front wall 24 and the rear wall 25 is divided by the rod 21. The cross-sectional shapes of the front wall 24, the rod 21, and the rear wall 25 are optimized for mounting straps.

[0059] The receiving portion 31 includes an upper plate 81, a lower plate 82, a side plate 83 and a bottom 84, defining a receiving space that is open in the front and on one side (the left side in the case of the figure). The upper plate 81 (for example, its front end) is provided with a male portion 6 (on the upper side) protruding toward the lower plate 82, and a female groove 5 (on the upper side) is defined between the male portion 6 and the bottom 84. The lower plate 82 (for example, its front end) is provided with a male portion 6' (on the lower side) protruding toward the upper plate 81, and a female groove 5' (on the lower side) is defined between the male portion 6' and the bottom 84. The shapes of the female groove 5 and the female groove 5' are formed to be mirror-symmetrical, but are not limited to this.

[0060] The accommodating space of the accommodating portion 31 is open in two directions, namely the front and the left and right sides, thereby promoting a smoother combination of the first buckle component 1 and the second buckle component 2. The front opening 85 of the accommodating portion 31 is wider in the width direction of the buckle components, and is defined by the upper plate 81, the lower plate 82 and the side plate 83, and has an open end on one side of the left and right sides (the left side in the case of the figure) and a closed end on the other side of the left and right sides (the right side in the case of the figure). The front opening 85 of the accommodating portion 31 includes: an opening area 85a, which has an upper and lower width W85a between the upper plate 81 and the lower plate 82; and an opening area 85b, which has an upper and lower width W85b that is reduced due to the male portion 6, 6' (refer to Fig.12 ). The opening region 85a is also spatially connected to the side port 86. The opening region 85b can be formed between the above-mentioned closing wall 63 and the opening region 85a.

[0061] The side opening 86 of the receiving portion 31 is an opening on one side of the receiving space in the width direction of the buckle component, and is defined by the upper plate 81, the lower plate 82 and the bottom 84, and has an open end in the front and a closed end in the rear. In addition, there is the following advantage: the receiving space of the receiving portion 31 is opened only on one side, rather than on both sides. For example, the insertion direction or insertion method of the insertion portion 32 into the receiving portion 31 is restricted, which can prevent the insertion portion 32 from being inserted into the receiving portion 31 in an undesirable direction or method.

[0062] The bottom portion 84 may have a bottom surface 84a inclined in parallel with the male portion 6, 6'. Typically, the stop surface 66 of the male portion 6, 6' is opposite to the bottom surface 84a of the bottom portion 84, defining the width W5 of the female groove 5, 5'. The bottom surface 84a of the bottom portion 84 does not need to be a flat surface. The width W5 of the female groove 5, 5' does not need to be constant in the width direction of the first buckle component 1, and may vary.

[0063] The top and bottom thickness of the bottom 84 is greater than the top and bottom thickness of the first magnet M1, but is not limited thereto, and is, for example, 1.2 times, 1.3 times, 1.4 times, or 1.5 times greater than the top and bottom thickness of the first magnet M1. Preferably, the gap between the bottom surface 84a of the bottom 84 and the front surface of the first magnet M1 embedded in the bottom 84 is small, for example, less than 1 / 5 of the front-to-back width of the first magnet M1.

[0064] The insertion portion 32 is connected to the second strap mounting portion 92 (e.g., the front wall 24 thereof), and optionally also connected to the stop wall 68. The insertion portion 32 includes: a plate-like portion 11 having an upper surface 11a and a lower surface 11b; a male portion 4 disposed on the upper surface 11a; and a male portion 4' disposed on the lower surface 11b. The shapes of the male portions 4 and 4' are formed to be mirror-symmetrical in the vertical direction, but are not limited thereto. The insertion portion 32 can have a chamfer 49 (see FIG. 4 ) connecting the upper surface of the male portion 4 and the front surface of the plate-like portion 11. Figure 2 ), in addition or in lieu thereof, a chamfer 49' may be provided connecting the lower surface of the male portion 4' and the front surface of the plate-shaped portion 11. Thus, the insertion of the insertion portion 32 into the receiving portion 31 becomes smooth. The chamfer includes the front surface of the male portion 4.

[0065] The insertion portion 32 includes a thick portion 67a having a relatively large thickness W67a and a thin portion 67b having a relatively small thickness W67b (see FIG. Figure 8 ). The thick portion 67a is composed of the male portion 4, 4' and the portion of the plate-like portion 11 where the male portion 4, 4' is provided. The thin portion 67b is composed of the portion of the plate-like portion 11 where the male portion 4, 4' is not provided. The thickness of the thin portion 67b is greater than the upper and lower thicknesses of the second magnet M2, thereby being able to more firmly hold the second magnet M2 in the plate-like portion 11. Preferably, the distance between the front surface of the insertion portion 32 and the front surface of the second magnet M2 is small, for example, less than 1 / 5 of the front-to-back width of the second magnet M2.

[0066] The thick portion 67a and the thin portion 67b can be inserted into the opening area 85a of the front opening 85 of the receiving portion 31. The thin portion 67b can be inserted into the opening area 85b of the front opening 85 of the receiving portion 31, but the thick portion 67a cannot be inserted. In addition, the thick portion 67a and the thin portion 67b can also be inserted into the side opening 86 of the receiving portion 31 described later.

[0067] The plate-like portion 11 can be longer than the male portion 4, 4' in the width direction of the second buckle component 2. As a result, the thin portion 67b can have a sufficient width in the width direction of the second buckle component 2, and the initial engagement of the first buckle component 1 and the second buckle component 2 can be ensured smoothly and easily. The plate-like portion 11 (and / or the thin portion 67b) includes: a protrusion 15, which protrudes on the same axis as the male portion 4, 4' in the width direction of the second buckle component 2; and a gap 16, which is formed between the protrusion 15 and the second strap cord mounting portion 92 (refer to Figure 7 On the other hand, the housing portion 31 has a closing wall 63 that partially closes the front opening 85 of the housing portion 31 (see Figure 8 , Fig.11 When the male parts 4, 4', 6, 6' are inserted into the female grooves 5, 5', 7, 7', the closing wall 63 is inserted into the above-mentioned gap 16, and the connection between the first buckle component 1 and the second buckle component 2 is strengthened.

[0068] Female grooves 7, 7' are formed between the male parts 4, 4' and the second strap and cord mounting part 92. The female grooves 7, 7' have a width W7 defined by the stop surface 46 (rear surface) of the male parts 4, 4' and the front surface of the front wall 24. The bottom surface of the female groove 7 coincides with the upper surface of the plate-like part 11, and the bottom surface of the female groove 7' coincides with the lower surface of the plate-like part 11. The depth of the female groove 7 coincides with the height of the upper surface of the male part 4 from the upper surface 11a of the plate-like part 11, and the depth of the female groove 7' coincides with the height of the lower surface of the male part 4' from the lower surface 11b of the plate-like part 11.

[0069] The first magnet M1 is embedded and held in the bottom 84 of the housing portion 31 (see Figure 5 ). The first magnet M1 is located at a height between the upper plate 81 and the lower plate 82, and at a height between the male portion 6 and the male portion 6'. The first magnet M1 is located behind the male portions 6, 6' and the female grooves 5, 5'. The second magnet M2 is embedded and retained in the insertion portion 32 (e.g., the plate-shaped portion 11). The second magnet M2 is located between the male portion 4 and the male portion 4', and is sandwiched in the up and down directions. The second magnet M2 is located in front of the female grooves 7, 7'. As Figure 4 As shown, when the first buckle member 1 and the second buckle member 2 are connected, the first magnet M1 and the second magnet M2 are located at the closest position and arranged on the same plane.

[0070] The first magnet M1 and the second magnet M2 may have three or more faces. Typically, the first magnet M1 and the second magnet M2 are polyhedrons having four or more faces, preferably cubes or cuboids. Figure 2As shown, the first magnet M1 and the second magnet M2 are rectangular parallelepipeds having an upper surface 8u, a lower surface 8d, a front surface 8f, a rear surface 8b, a left side surface 8l and a right side surface 8r. The front surface 8f, the rear surface 8b, the left side surface 8l and the right side surface 8r extend along the thickness direction D2 of the buckle 9 (and the thickness direction of the buckle component). The upper surface 8u and the lower surface 8d are orthogonal to or intersect with the thickness direction D2 of the buckle 9 (and the thickness direction of the buckle component). In addition, the front surface 8f and the rear surface 8b are surfaces orthogonal to or intersect with the length direction D3 of the buckle 9. The left side surface 8l and the right side surface 8r are surfaces orthogonal to or intersect with the width direction D1 of the buckle 9. Advantageously, the first magnet M1 and the second magnet M2 are rectangular parallelepipeds that are longer along the width direction D1 of the buckle 9, and are oriented, for example, in parallel, along the male portion 4, 4', the male portion 6, 6', the female groove 5, 5' and / or the female groove 7, 7'.

[0071] The mold device 100 is provided with a positioning structure for positioning the first magnet M1. According to the positioning structure of the mold, a plurality of windows are formed in the injection molding part 3 to partially expose the first magnet M1. The same is true for the second magnet M2.

[0072] like Figure 7 As shown in FIG. 1 , a third window portion K3 is formed on the upper side of the second engaging portion 94 (insertion portion 32 or plate-shaped portion 11). Figure 8 to Figure 10 As shown, the first window K1 and the second window K2 are formed on the lower side of the second engaging portion 94 (the insertion portion 32 or the plate-shaped portion 11) to expose multiple different regions of the first magnet M1. When the first window K1 and the second window K2 are formed on the lower side of the second engaging portion 94, it is difficult to visually recognize these windows from the outside in the normal use state of the buckle 9. In addition or alternatively, the first window K1 and the second window K2 do not penetrate the male portion 4', thereby ensuring the mechanical strength of the male portion 4'.

[0073] like Fig.11 As shown in FIG. 1 , a third window portion K3 is formed on the upper side of the first engaging portion 93 (accommodating portion 31). Fig.13 and Fig.14 As shown, a first window portion K1, a second window portion K2, and a fourth window portion K4 are formed on the lower side of the first engaging portion 93, exposing multiple different regions of the second magnet M2. As described above, the windows K1, K2, and K4 are formed on the lower side of the first engaging portion 93, so that these windows are difficult to visually recognize from the outside when the buckle 9 is normally used. The first window portion K1, the second window portion K2, and the fourth window portion K4 are different from the third window portion K3 and are formed in a manner that they are exposed not only on one surface of the first magnet M1 and the second magnet M2 but on multiple surfaces thereof.

[0074] Reference Fig.10Let me explain in more detail. The second magnet M2 is exposed in the first region R1 in the first window portion K1. In the first region R1 in the first window portion K1, the first partial region E1 of the lower surface 8d of the second magnet M2 is exposed, the second partial region E2 of the left side surface 8l of the second magnet M2 is exposed, and the third partial region E3 of the front surface 8f of the second magnet M2 is exposed. In addition, the first edge 35 between the first partial region E1 and the second partial region E2 is also exposed, and similarly, the second edge 36 between the second partial region E2 and the third partial region E3 is also exposed. This means that the first support protrusion 111 (refer to Fig.21 ) contacts three surfaces of the second magnet M2, which can simplify and prolong the life of the positioning structure of the mold device. The size of the supporting protrusion is increased, which makes it difficult for it to be damaged by unexpected contact, etc. In addition, the resin part of the second engaging part 94 (plate-shaped part 11) covers the corner formed by the lower surface 8d of the second magnet M2, the left side surface 8l of the second magnet M2 and the front surface 8f of the second magnet M2, so that the holding force of the injection molding part 3 on the second magnet M2 can be fully maintained.

[0075] like Fig.10 As shown, the second magnet M2 is exposed in the second region R2 in the second window K2. In the second region R2 in the second window K2, the fourth partial region E4 of the lower surface 8d of the second magnet M2 is exposed, and the fifth partial region E5 of the rear surface 8b of the second magnet M2 is exposed. In addition, the third edge 37 between the fourth partial region E4 and the fifth partial region E5 is also exposed. As described above, this means that the second support protrusion 112 of the mold device (see Fig.21 ) contacts the two surfaces of the second magnet M2, which can simplify and prolong the life of the positioning structure of the mold device. In addition, the resin portion of the second engaging portion 94 (plate-shaped portion 11) covers the corner formed by the lower surface 8d of the second magnet M2, the rear surface 8b of the second magnet M2 and the right side 8r of the second magnet M2, so that the holding force of the injection molding portion 3 on the second magnet M2 can be fully maintained.

[0076] like Figure 7 As shown, the second magnet M2 is exposed in the third region R3 in the third window K3. In the third region R3 in the third window K3, the sixth partial region E6 of the upper surface 8u of the second magnet M2 is exposed. This means that the pressing protrusion 121 (see Fig.21) contacts one surface of the second magnet M2. In particular, at least a portion of the third region R3 can be located on the opposite side of the first region R1. The second magnet M2 is clamped from above and below between the first supporting protrusion 111 and the pressing protrusion 121, so that its displacement can be prevented despite the pressure from the molten resin in the molding cavity 105. A groove can also be provided in the second magnet M2 to fit with the supporting protrusion or the pressing protrusion (in a separable manner).

[0077] The description of the windows K1 to K3 of the second buckle member 2 also applies to Figures 11 to 13 The windows K1 to K3 of the first buckle component 1 are shown, and repeated description is omitted. In addition, the window K1 of the first buckle component 1 is different from the window K1 of the second buckle component 2, and a local area is exposed on two surfaces of the magnet M1 instead of three surfaces. In addition, the first buckle component 1 is different from the second buckle component 2 and also has a fourth window K4.

[0078] like Fig.14 As shown, in the fourth region R4 of the fourth window portion K4 of the housing portion 31, the seventh partial region E7 of the lower surface 8d of the first magnet M1 is exposed, and the eighth partial region E8 of the rear surface 8b of the first magnet M1 is exposed. In addition, the edge 38 between the seventh partial region E7 and the eighth partial region E8 is also exposed. This means that the fourth support protrusion 114 of the mold device (see Fig. 22 ) contacts two surfaces of the first magnet M1, which can simplify and prolong the life of the positioning structure of the mold device. In addition, the resin of the accommodating portion 31 covers the corner formed by the lower surface 8d of the first magnet M1, the rear surface 8b of the first magnet M1 and the right side 8r of the first magnet M1, so that the holding force of the injection molding portion 3 on the first magnet M1 can be fully maintained.

[0079] As described above for the first buckle component 1, at least a portion of the third region R3 can be located on the opposite side of the first region R1 in the second buckle component 2. The first magnet M1 is clamped from above and below between the third supporting protrusion 113 and the pressing protrusion 122, so that displacement can be prevented despite the pressure from the molten resin in the molding cavity 105.

[0080] Based on the above description, it can be known that in the first buckle component 1 and the second buckle component 2, the injection molding portion 3 is formed to expose the magnets M1 and M2 partially at least in the first region R1 of the magnets M1 and M2. Exemplarily, the first region R1 includes: the first local region E1 and the second local region E2 adjacent to the first surface and the second surface of the magnets M1 and M2; and the first edge 35 between the adjacent first local region E1 and the second local region E2. In this way, when preventing the magnet from falling off from the buckle component, the positioning structure of the magnet or magnetic body in the mold device can be simplified and the service life can be prolonged.

[0081] Advantageously, at least one of the magnets M1 and M2 is a hexahedron, and the injection molding portion 3 is formed so that five of the six faces of the hexahedron except one face are partially exposed. This means that no supporting protrusion corresponding to the one face is provided. However, in this case, the molten resin is supplied in such a manner that the molten resin flow presses the one face in the molding cavity 105, thereby also being able to suppress the displacement of the magnet. Fig.21 and Fig. 22 , the flow direction of the molten resin in the molding cavity 105 is schematically indicated by the arrow DF. From the viewpoint of reducing not only the influence of demagnetization caused by thermal influence but also the displacement caused by the flow of molten resin, it is also preferred to use the first magnet M1 and the second magnet M2 of larger size. In some cases, the first magnet M1 and the second magnet M2 have a width in the width direction of the buckle component that exceeds 1 / 2 of the maximum width of the buckle component. In addition, when the magnet or magnetic body is a polyhedron, all corners of the polyhedron are covered by the injection molding part 3, thereby being able to more firmly hold the magnet or magnetic body.

[0082] As described above, the injection molding portion 3 can have a plurality of windows K1 to K3 or windows K1 to K4. By increasing the number of windows, the magnet or magnetic body can be more stably positioned and held in the molding cavity 105, but the positioning structure of the mold device 100 is complicated, and each protrusion becomes smaller, resulting in an increased risk of damage. For example, if six protrusions are provided corresponding to the six faces of the magnets M1 and M2, the structure of the mold device 100 becomes complicated, and the size of each protrusion becomes smaller. In this embodiment, the shape of the injection molding portion 3 described above can promote the simplification and longevity of the positioning structure of the mold device 100.

[0083] Based on the above description, it can be known that the second window portion K2 is recessed in the same direction as the first window portion K1 at a position different from the first window portion K1 in the thickness direction of the buckle parts 1 and 2, so that at least one magnet M1 and M2 is partially exposed. The third window portion K3 is recessed in the opposite direction to the first window portion K1 in the thickness direction of the buckle parts 1 and 2, so that at least one magnet M1 and M2 is partially exposed. The third region R3 can include a local region E6 located on the opposite side of one of the first local region E1 and the second local region E2.

[0084] Advantageously, the first window portion K1 and the second window portion K2 are located near the two ends of the rectangular magnet or magnetic body. In addition or alternatively, one of the left side and the right side of the rectangular magnet or magnetic body is selectively covered by the injection molding portion 3 in its entire area. Thus, the magnet or magnetic body can be more firmly held.

[0085] Although it is assumed that the orientations of the first magnet M1 and the second magnet M2 in the injection molded portion 3 are various, exemplary orientations are as follows. The first magnet M1 is oriented along the female grooves 5, 5' (for example, parallel or substantially parallel), and the second magnet M2 is oriented along the male parts 4, 4' (for example, parallel or substantially parallel). The first magnet M1 can be oriented in such a manner that its magnetic axis AX1 is orthogonal to or intersecting with the extension direction of the female grooves 5, 5' (the axis L5 parallel to the insertion direction of the male parts 4, 4' into the female grooves 5, 5'). The second magnet M2 can be oriented in such a manner that its magnetic axis AX2 is orthogonal to or intersecting with the extension direction of the male parts 4, 4' (the axis L2 parallel to the insertion direction of the male parts 4, 4' into the female grooves 5, 5'). In this way, the male parts 4, 4', 6, 6' are smoothly inserted into the female grooves 5, 5', 7, 7' by the magnetic attraction force between the first magnet M1 and the second magnet M2 (particularly the magnetic attraction force in the radial direction of the magnetic axes AX1, AX2). The magnetic axis AX1 can intersect the axis L5 at an acute angle of 60° or more. The magnetic axis AX2 can intersect the axis L2 at an acute angle of 60° or more.

[0086] The acute angle θ4 (refer to Fig.11 ) Correspondingly, the magnetic axis AX1 of the first magnet M1 forms an acute angle θ6 with the center line CL of the first buckle member 1 (see Fig.11 ). Corresponding to the acute angle θ1 of the inclination of the male portion 4, 4' (refer to Figure 7 ), the magnetic axis AX2 of the second magnet M2 forms an acute angle θ3 with the center line CL of the buckle 9 (refer to Figure 7 ). Acute angles θ1, θ3, θ4, and θ6 are the same or substantially the same. Acute angles θ3 and θ4 are the same or substantially the same as acute angles θ1 and θ2.

[0087] The magnetic axis of the magnet coincides with the center axis of the plurality of magnetic field lines extending from the N pole toward the S pole of the magnet (see Figure 3 ). In other words, the magnetic axis of the magnet is located at the center of the magnet in the width direction of the buckle part, and is consistent with the axis line where different magnetic poles are arranged. The magnetic poles of the first magnet M1 and the second magnet M2 are arranged as shown in Figure 3 shown.

[0088] Reference Figures 16 to 19 , the process of combining the first buckle component 1 and the second buckle component 2 is described. Fig.16 When shown, a magnetic attraction force is generated between the first magnet M1 and the second magnet M2, so the first buckle component 1 and the second buckle component 2 move closer to each other. In addition, in the following description, the predetermined position of the second buckle component 2 is fixed, and the first buckle component 1 is described as being close to the second buckle component 2, but the opposite situation and the situation where both sides are close can also be understood in the same way.

[0089] exist Fig.17 When shown, according to the magnetic attraction between the first magnet M1 and the second magnet M2, the second end 62 of the male part 6, 6' slides on the guide surface 45 of the male part 4, 4' (the guide surface 65 in the example shown in the figure). Similarly, the second end 42 of the male part 4, 4' also slides on the guide surface 65 of the male part 6, 6'. In the example shown in the figure, the guide surface 45 of the male part 4, 4' and the guide surface 65 of the male part 6, 6' are in contact with each other, which can ensure smooth displacement between the male part 4, 4' and the male part 6, 6'. Corresponding to the sliding of the second end 62 of the male part 6, 6' on the guide surface 45 of the male part 4, 4', the first magnet M1 approaches the second magnet M2, but in contrast, the interval W9 between the magnetic axis AX1 and the magnetic axis AX2 increases. To be clear, the second end 62 of the male part 6, 6' functions as a sliding part. The end of the male part that slides on the guide surface can also be called a sliding part.

[0090] In from Figure 16 to Figure 17 In the process of buckling, there is a possibility that the male parts 4, 4' of the second buckle member 2 and the male parts 6, 6' of the first buckle member 1 collide with each other and prevent the insertion part 32 from being inserted into the receiving part 31 (as a result, there is a possibility that the first buckle member 1 and the second buckle member 2 are prevented from automatically connecting). However, even if such a situation occurs, in most cases, it is easy to get out of this state by applying a slight external force to one of the first buckle member 1 and the second buckle member 2. Fig.13 Status shown.

[0091] exist Fig.18At the time shown, the second end 62 of the male part 6, 6' slides on the guide surface 45 of the male part 4, 4' and the second end 62 of the male part 6, 6' is located at the introduction end 71 of the female groove 7, 7'. Similarly, the second end 42 of the male part 4, 4' slides on the guide surface 65 of the male part 6, 6' and the second end 42 of the male part 4, 4' is located at the introduction end 51 of the female groove 5, 5'. Then, according to the magnetic attraction between the first magnet M1 and the second magnet M2 in the radial direction of the magnetic axis AX1, AX2 (that is, the alignment effect of the first magnet M1 and the second magnet M2), the first buckle component 1 and the second buckle component 2 are close to each other along the width direction D1 of the buckle 9, and the male part 6, 6' is inserted into the female groove 7, 7', and the male part 4, 4' is inserted into the female groove 5, 5'. Each male part moves from the introduction end of each groove to the opposite end.

[0092] The second end 62 of the male part 6, 6' moves along the rounded edge 47 between the guide surface 45 and the stop surface 46 of the male part 4, 4'. Similarly, the second end 42 of the male part 4, 4' moves along the rounded edge 67 between the guide surface 65 of the male part 6, 6' and the stop surface 66 of the male part 6, 6'. In the process of each male part 4, 4', 6, 6' passing the above-mentioned edge 46, 67, the interval W9 between the magnetic axes AX1, AX2 becomes the maximum value. Then, corresponding to the male part 6, 6' being inserted into the female groove 7, 7' and the male part 4, 4' being inserted into the female groove 5, 5', the interval W9 between the magnetic axes AX1, AX2 gradually decreases. When the interval W9 between the magnetic axes AX1, AX2 is the maximum value, the first magnet M1 and the second magnet M2 are partially opposite to each other. That is, the left side portion (e.g., the left half) of the first magnet M1 and the left side portion (e.g., the left half) of the second magnet M2 are opposed to each other with a small gap in the longitudinal direction D3 of the buckle 9. Therefore, even if the gap between the magnetic axes AX1 and AX2 increases, the first magnet M1 and the second magnet M2 can be maintained in a state of being fully magnetically coupled.

[0093] exist Fig.19 At the time shown, according to the magnetic attraction between the first magnet M1 and the second magnet M2 in the radial direction of the magnetic axes AX1 and AX2 (i.e., the alignment effect of the first magnet M1 and the second magnet M2), the insertion of the male parts 6 and 6' into the female grooves 7 and 7' is completed, and the insertion of the male parts 4 and 4' into the female grooves 5 and 5' is completed. In addition, the receiving portion 31 collides with the stop wall 68 (the stop wall 68 is received in the notch 69 of the receiving portion 31), and the combination of the first buckle component 1 and the second buckle component 2 is completed.

[0094] In order to prevent the second buckle component 2 from being displaced in the direction away from the first buckle component 1 in the longitudinal direction D3 of the buckle 9, the stopper surface 66 of the male portion 6, 6' of the first buckle component 1 can contact the male portion 4, 4' of the second buckle component 2. Similarly, in order to prevent the first buckle component 1 from being displaced in the direction away from the second buckle component 2 in the longitudinal direction D3 of the buckle 9, the stopper surface 46 of the male portion 4, 4' of the second buckle component 2 can contact the male portion 6, 6' of the first buckle component 1. In this way, the separation (relative displacement) of the first buckle component 1 and the second buckle component 2 in the longitudinal direction D3 of the buckle 9 can be prevented.

[0095] When the first buckle component 1 and the second buckle component 2 are connected, a gap W9 remains between the magnetic axes AX1 and AX2, thereby preventing the male parts 6 and 6' from being easily pulled out of the female grooves 7 and 7' and the male parts 4 and 4' from being easily pulled out of the female grooves 5 and 5'. In addition, as described above, the closing wall 63 of the second buckle component 2 is inserted into the gap 16 of the plate-like portion 11 of the second buckle component 2, and the connection between the first buckle component 1 and the second buckle component 2 is strengthened.

[0096] Based on the above description, the manufacturing method of the first buckle component 1 and the second buckle component 2 is clear to those skilled in the art, but the description is given for the sake of clarity. The manufacturing method of the first buckle component 1 and the second buckle component 2 includes: a step of arranging the first magnet M1 on a plurality of supporting protrusions 111 and 112 provided on the first half cavity 103 of the fixed mold 101; and a step of supplying molten resin to the molding cavity 105 in a state where the first magnet M1 is arranged in the molding cavity 105 including the first half cavity 103 and the second half cavity 104 of the movable mold 102. The first magnet M1 is supported by the supporting protrusions 111 and 112, and the window portions K1 and K2 are formed in the injection molding portion 3 accordingly. In the case where the second half cavity 104 of the movable mold 102 is provided with one or more pressing protrusions 121, the window portion K3 is formed in the injection molding portion 3 accordingly.

[0097] The plurality of support protrusions 111, 112 include a first support protrusion 111 that contacts the first magnet M1 at least in the entire first region R1 of the first magnet M1. The first region R1 includes: a first local region E1 and a second local region E2 adjacent to the first surface and the second surface (the lower surface 8d and the left side surface 81) of the first magnet M1; and a first edge 35 between the first local region E1 and the second local region E2 adjacent to each other. The same is true in the case where the first magnet M1 is a magnetic body, and the same description applies to the manufacture of the second buckle component 2.

[0098] When the magnet M1 is arranged in the first half cavity 103 of the fixed mold 101, in order to appropriately set the vertical positional relationship between the N pole and the S pole of the magnet M1, another magnet may be arranged just below the predetermined arrangement position of the magnet M1. For example, when a magnetic attraction force is generated between the magnet M1 and the other magnet, it can be known that the magnet M1 is appropriately arranged. When a magnetic repulsion force is generated between the magnet M1 and the other magnet, it can be known that the magnet M1 is inappropriately arranged.

[0099] from Fig.21 and Fig. 22 It is clear that the windows K1, K2, and K4 are formed corresponding to the contact range between the supporting protrusion and the magnet (magnetic body). The window K3 is formed corresponding to the contact range between the pressing protrusion and the magnet (magnetic body). The specific outline of the window and its three-dimensional spatial shape can be changed in various ways. The supporting protrusion contacts the adjacent local areas of two adjacent faces of the magnet (magnetic body) or the connected local areas of three connected faces to support the magnet (magnetic body).

[0100] Based on the above teachings, those skilled in the art can make various changes to the various embodiments and features. The reference numerals incorporated in the claims are for reference only and are not to be used for the purpose of limiting the scope of the claims.

Claims

1. A buckle component, comprising: Injection molding section (3); as well as at least one magnet or magnetic body (M1, M2) held by the injection molded portion (3), the buckle components (1, 2) being characterized in that: The injection molded portion (3) is molded so that the magnet or magnetic body (M1, M2) is partially exposed at least in a first region (R1) of the magnet or magnetic body (M1, M2). The first region (R1) includes: the adjacent first local region (E1) and the adjacent second local region (E2) of the adjacent first surface (8d) and the adjacent second surface (8l) of the magnet or magnetic body (M1, M2); and the first edge (35) between the adjacent first local region (E1) and the adjacent second local region (E2).

2. The buckle component according to claim 1, characterized in that: The injection molding portion (3) has a first window portion (K1), which is recessed at least in the thickness direction of the buckle component (1, 2) and exposes the first region (R1), and one of the first surface (8d) and the second surface (8l) extends along the thickness direction, and the other of the first surface (8d) and the second surface (8l) extends in a manner intersecting the thickness direction.

3. The buckle component according to claim 2, characterized in that: The magnet or magnetic body (M1, M2) has a third surface (8f), the third surface (8f) is adjacent to both the first surface (8d) and the second surface (8l), and extends along the thickness direction of the buckle component (1, 2). The first window portion (K1) is formed so as to partially expose the third surface (8f).

4. The buckle component according to claim 3, characterized in that: The injection molded portion (3) covers at least the corners of the magnet or magnetic body (M1, M2) formed by the first surface (8d), the second surface (8l), and the third surface (8f).

5. The buckle component according to claim 3 or 4, characterized in that: The first surface (8d) is a lower surface, the second surface (8l) is a side surface, and the third surface (8f) is a front surface.

6. The buckle component according to any one of claims 1 to 4, characterized in that: The injection molding part (3) has a second window part (K2), which is recessed in the same direction as the first window part (K1) at a position different from the first window part (K1) at least in the thickness direction of the buckle part (1, 2), so that the magnet or magnetic body (M1, M2) is partially exposed.

7. The buckle component according to claim 6, characterized in that: The magnet or magnetic body (M1, M2) has a second region (R2) exposed through the second window portion (K2), and the second region (R2) includes a local region (E4) contained in one of the first surface (8d) and the second surface (8l).

8. The buckle component according to claim 6, characterized in that: The injection molding part (3) has a third window part (K3), which is recessed in a direction opposite to the first window part (K1) at least in the thickness direction of the buckle part (1, 2), so that the magnet or magnetic body (M1, M2) is partially exposed.

9. The buckle component according to claim 8, characterized in that: The magnet or magnetic body (M1, M2) has a third region (R3) exposed through the third window portion (K3), and the third region (R3) includes a local region (E6) located on the opposite side of one of the first local region (E1) and the second local region (E2).

10. The buckle component according to claim 8 or 9, characterized in that: The magnet or magnetic body (M1, M2) is a hexahedron, and the injection molded portion (3) is molded so that five of the six faces of the hexahedron except one face are partially exposed.

11. The buckle component according to any one of claims 1 to 4, characterized in that: The magnet or magnetic body (M1, M2) is a polyhedron, The injection molded portion (3) covers all corners of the polyhedron.

12. The buckle component according to any one of claims 1 to 4, characterized in that: The magnet or magnetic body (M1, M2) has a width in the width direction of the buckle component that exceeds 1 / 2 of the maximum width of the buckle component.

13. The buckle component according to any one of claims 1 to 4, characterized in that: The injection molding part (3) includes: a belt and cord mounting part (91, 92); and a snap-fit ​​part (93, 94) connected to the belt and cord mounting part (91, 92). The magnet or magnetic body (M1, M2) is embedded in the engaging portion (93, 94) in a manner such that the magnet or magnetic body (M1, M2) is partially exposed.

14. The buckle component according to claim 13, characterized in that: The engaging portion (93, 94) comprises: at least one female groove (5, 5', 7, 7') extending along the width direction of the buckle component (1, 2); and at least one male portion (4, 4', 6, 6') adjacent to the at least one female groove (5, 5', 7, 7') on a side of the at least one female groove (5, 5', 7, 7') away from the belt cord mounting portion (91, 92). The at least one male portion (4, 4', 6, 6') is arranged to be orthogonal to or intersect with the magnetic axis (AX1, AX2) of the magnet (M1, M2) when viewed from the thickness direction of the buckle component (1, 2).

15. A method for manufacturing a buckle component, wherein the buckle component (1, 2) has at least one magnet or magnetic body (M1, M2), the method for manufacturing the buckle component (1, 2) comprising: The step of disposing at least one magnet or magnetic body (M1) on a plurality of supporting protrusions (111, 112) provided on a first half cavity (103) of a fixed mold (101); and The step of supplying molten resin to the molding cavity (105) in a state where the magnet or magnetic body (M1) is arranged in the molding cavity (105) of the second half cavity (104) of the movable mold (102), The plurality of support protrusions (111, 112) include a first support protrusion (111), the first support protrusion (111) being in contact with the magnet or magnetic body (M1) at least in the entire first region (R1) of the magnet or magnetic body (M1), The first region (R1) includes: a first local region (E1) and a second local region (E2) adjacent to the first surface (8d) and the second surface (8l) of the magnet or magnetic body (M1); and a first edge (35) between the adjacent first local region (E1) and the second local region (E2).

16. The method for manufacturing a buckle component according to claim 15, characterized in that: The plurality of support protrusions (111, 112) include a second support protrusion (112), the second support protrusion (112) being in contact with the magnet or magnetic body (M1) at least in the entire second region (R2) of the magnet or magnetic body (M1), The second region (R2) includes a local region (E4) included in one of the first surface (8d) and the second surface (81).

17. The method for manufacturing a buckle component according to claim 15 or 16, characterized in that: The second half cavity (104) has a pressing protrusion (121), and the pressing protrusion (121) is in contact with the magnet or magnetic body (M1) at least in the entire third region (R3) of the magnet or magnetic body (M1). The third region (R3) includes a local region (E6) located on the opposite side of any one of the first local region (E1) and the second local region (E2).

18. A buckle component, comprising: Injection molding section (3); at least one magnet or magnetic body (M1, M2) held by the injection molded portion (3), the buckle components (1, 2) being characterized in that: The injection molded portion (3) is molded so that the magnet or magnetic body (M1, M2) is partially exposed at least in a first region (R1) of the magnet or magnetic body (M1, M2).

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