Zipper tape, zipper, and stopper member, and method for manufacturing zipper

Abstract

The code-stopping components (5a, 5b) include a magnetic body (30a, 30b) and a base (6a, 6b) on which the magnetic body (30a, 30b) is embedded. The base (6a, 6b) includes a first resin portion (41a, 41b) and a second resin portion (42a, 42b) that can be identified based on the interface formed between them. The first resin portion (41a, 41b) and the second resin portion (42a, 42b) are respectively provided in a first region (31) and a second region (32) that cover at least one surface (34, 35, 36) of the magnetic body (30a, 30b).

Description

Technical Field

[0001] This disclosure relates to a zipper tooth tape, a zipper, a stop component, and a method for manufacturing the zipper. Background Technology

[0002] There is a need to improve the ease of opening and closing zippers.

[0003] Patent Document 1 discloses a scheme for simplifying the operation of a zipper stop using a magnet. Specifically, when the first and second bases of the first and second components overlap, a magnetic attraction or repulsion force is generated between them, causing the second base to rotate relative to the first base. At this time, the second insertion portion of the second component pivots toward the gap between the upper and lower flanges of the zipper pull. This reduces the operational burden of the stop required to close the zipper. A permanent magnet is housed in a receiving portion of the base.

[0004] Patent document 2 discloses a method for mounting a magnet in a recess of a sliding plate by fitting.

[0005] Patent document 3 discloses a zipper with magnetically attachable teeth. An elastomer containing unmagnetized particles is injection molded, and then a magnetic field is applied to magnetize these particles. The strength and position of the magnetic field are appropriately controlled, causing the magnetized particles to form a row-like cluster within the elastomer. The elastomer is then processed to solidify and form the shape of the zipper teeth.

[0006] Patent document 4 discloses a method for magnetizing an unmagnetized magnet after it has been installed on a tie.

[0007] Prior art literature

[0008] Patent documents

[0009] Patent Document 1: International Publication No. 2019 / 175944

[0010] Patent Document 2: Japanese Patent No. 4152216

[0011] Patent Document 3: U.S. Patent No. 10,709,212

[0012] Patent Document 4: Japanese Utility Model Registration No. 3,078,682 Summary of the Invention

[0013] In one aspect of this disclosure, the aim is to further enhance the retention structure of the magnetic material in the stop code component.

[0014] One aspect of this disclosure relates to a zipper belt with zipper teeth, comprising: a zipper belt having zipper teeth; and a stop component fixed to the zipper belt at a position adjacent to the zipper teeth, wherein the zipper belt has zipper teeth.

[0015] The code-stopping component includes: a magnetic body; and a base, wherein the magnetic body is embedded.

[0016] The base includes a first resin portion and a second resin portion, which can be identified based on the interface formed between them.

[0017] The first resin portion and the second resin portion are respectively disposed in a first region and a second region that are different from each other, covering at least one side of the magnetic body. The first resin portion and the second resin portion directly cover the first region and the second region, respectively. Each resin portion is in direct contact with each region without any gap between them.

[0018] In some embodiments, at least one surface of the magnetic body is complementaryly covered by the first resin portion and the second resin portion, or in each surface of the magnetic body, the first region and the second region are respectively covered by the first resin portion and the second resin portion. In some embodiments, the first resin portion has one or more exposed surfaces that are not covered by the second resin portion. The exposed surfaces can extend radially along the central axis of the magnetic body. In some embodiments, the second resin portion has exposed surfaces that extend radially along the central axis of the magnetic body. In some embodiments, a layered portion of the first resin portion and the second resin portion is provided on the central axis of the magnetic body.

[0019] In some embodiments, the base has an axial protrusion with an embedded magnetic element, the top surface of which includes the exposed surfaces of the first resin portion and the second resin portion. The sidewalls of the axial protrusion can be formed by alternating circumferentially arranged walls of the first resin portion and the second resin portion. The base has a recess, with the magnetic element disposed directly below the bottom surface of the recess, the bottom surface of which can include the exposed surfaces of the first resin portion and the second resin portion.

[0020] In some embodiments, (a) a shaft-shaped protrusion is provided at the base to at least partially embed the magnetic body, the sidewall of the shaft-shaped protrusion including the wall portion of the first resin portion and the wall portion of the second resin portion, or (b) a recess is provided at the base to place the magnetic body directly below the bottom surface, the bottom surface of the recess including the exposed surface of the first resin portion and the exposed surface of the second resin portion.

[0021] The first resin part is configured to accommodate a magnetic body, and the second resin part can constitute the remaining portion of the stop component other than the first resin part. The magnetic body can be a permanent magnet having a pair of main surfaces arranged intersecting a magnetic axis and a side surface connecting the outer periphery of the pair of main surfaces.

[0022] Another aspect of this disclosure relates to a zipper comprising: a pair of zipper teeth; and a zipper pull movable to open and close the pair of zipper teeth, wherein the zipper...

[0023] The pair of zipper teeth are either of the zipper teeth described above, each equipped with a permanent magnet as a magnetic element.

[0024] A pair of stop components within each pair of zipper teeth contain permanent magnets. These permanent magnets are magnetically attracted to each other, causing the pair of stop components to overlap.

[0025] One of the pair of stop components has an inclined surface that slopes as it extends circumferentially along the magnetic axis of the permanent magnet.

[0026] Another of the pair of stop components has a sliding portion that slides on an inclined surface due to the magnetic attraction of the permanent magnets of the pair of stop components.

[0027] Another aspect of this disclosure relates to a method for manufacturing a stop-code component, the stop-code component being fixed to or already fixed to a zipper belt, the method for manufacturing the stop-code component comprising:

[0028] The process of injection molding the stop code component by embedding a magnetic material; and

[0029] The process of applying a magnetic field to the stop code component after injection molding to magnetize the magnetic material.

[0030] In some embodiments, injection molding includes at least two injection molding processes, in which a first region of at least one side of the magnetic body is covered by a first resin portion in the first injection molding process, and a second region of at least one side of the magnetic body is covered by a second resin portion in the second injection molding process.

[0031] Another aspect of this disclosure relates to a method of manufacturing a zipper having magnetically attachable and separable stop bars, the method comprising: a step of pairing zipper teeth as described in any of the preceding claims; and a step of applying a fixed-direction magnetic field to the coupled stop bar components included in the pair of zipper teeth to magnetize a magnetic material embedded in each stop bar component.

[0032] Invention Effects

[0033] According to one aspect of this disclosure, the retention structure of the magnetic material in the code-stopping component is further strengthened. Attached Figure Description

[0034] Figure 1 This is a schematic top view of the zipper in the open state, as disclosed in this invention.

[0035] Figure 2This is a rough bottom view of the left zipper teeth.

[0036] Figure 3 This is a rough right-side view of the left-side zipper teeth.

[0037] Figure 4 This is a rough bottom view of the right zipper teeth.

[0038] Figure 5 This is a schematic cross-sectional view of the left zipper teeth, showing the zipper teeth along... Figure 1 The approximate cross-sectional structure of the left-side stop code component of the dotted-dash line X5-X5.

[0039] Figure 6 This is a schematic cross-sectional view of the right-side zipper teeth, showing the zipper teeth along... Figure 4 The approximate cross-sectional structure of the right-side stop code component of the dotted-dash line X6-X6.

[0040] Figure 7 This is a schematic diagram showing that the insertion part of the right-side stop component is automatically inserted into the zipper due to the magnetic attraction of the permanent magnets of the left and right stop components.

[0041] Figure 8 This is a simplified flowchart illustrating the manufacturing process of the stop code component.

[0042] Figure 9 This is a schematic diagram showing the process of covering the first region of each side of the left-side magnetic body with the first resin part through a single injection molding process.

[0043] Figure 10 This is a schematic diagram showing the process of covering the first region of each side of the right-side magnetic body with the first resin part through a single injection molding process.

[0044] Figure 11 This indicates that the second region of each surface of the left-side magnetic body is formed through two injection molding processes. Figure 11 (Not shown in the diagram) Schematic process diagram of a process where the first resin part is covered by the second resin part and the second resin part is covered by the second resin part.

[0045] Figure 12 This is a schematic diagram showing the process of making the second region of each side of the right-side magnetic body covered by the second resin part and the first resin part covered by the second resin part through two injection molding processes.

[0046] Figure 13 This is a schematic perspective view of a one-piece molded article in which the magnetic body on the left is partially covered by the first resin part.

[0047] Figure 14 yes Figure 13 A schematic top view of the one-piece molded product is shown.

[0048] Figure 15 yes Figure 13 A schematic bottom view of the one-piece molded product is shown.

[0049] Figure 16 yes Figure 15 The schematic cross-sectional view of the one-piece molded article shown illustrates the process along... Figure 15 The cross section of the dotted-dash line X16-X16.

[0050] Figure 17 yes Figure 15 The schematic cross-sectional view of the one-piece molded article shown illustrates the process along... Figure 15 The cross section of the dotted line X17-X17.

[0051] Figure 18 This is a schematic perspective view of a one-piece molded article in which the magnetic body on the right is partially covered by the first resin part.

[0052] Figure 19 yes Figure 18 A schematic top view of the one-piece molded product is shown.

[0053] Figure 20 yes Figure 18 A schematic bottom view of the one-piece molded product is shown.

[0054] Figure 21 yes Figure 20 The schematic cross-sectional view of the one-piece molded article shown illustrates the process along... Figure 20 The cross section of the dotted line X21-X21.

[0055] Explanation of reference numerals in the attached figures

[0056] 1. Zipper

[0057] 2a, 2b Zipper teeth

[0058] 3a, 3b Zipper tape

[0059] 4a, 4b Zipper teeth

[0060] 5a, 5b Stop code components

[0061] 6a, 6b base

[0062] Insertion parts 7a and 7b

[0063] 30a, 30b Magnetic materials (permanent magnets)

[0064] 41a, 41b First resin section

[0065] 42a, 42b Second Resin Section

[0066] 31. Area 1

[0067] 32 Area 2

[0068] 34, 35 Main side

[0069] 36 Side View Detailed Implementation

[0070] Hereinafter, various embodiments and features will be described with reference to the accompanying drawings. Those skilled in the art will be able to combine the various embodiments and / or features without excessive explanation, and will also understand the synergistic effects resulting from such combinations. Repeated descriptions between embodiments are generally omitted. The accompanying drawings are primarily for the purpose of describing the invention and are simplified for ease of drawing. The features are not only effective for the manufacturing method of the zipper teeth and stopper components disclosed in this application, but can be understood as general features applicable to other manufacturing methods of various zipper teeth and stopper components not disclosed in this specification.

[0071] Below, the front-to-back direction is compared to the direction the zipper pull moves to open and close the zipper (looking straight ahead). Figure 1 The vertical direction is consistent with the horizontal direction. The horizontal direction is perpendicular to the front and back directions and parallel to the surface of the zipper tape (when viewed from the front). Figure 1 (The left-right direction). The up-down direction is orthogonal to the front-back direction and perpendicular to the zipper tape surface. The zipper tape surface is the surface that specifies the thickness of the zipper tape.

[0072] Zipper 1 includes left and right zipper teeth 2a and 2b, and a slider 40 for opening and closing zipper 1. By moving the slider 40 forward, zipper 1 is closed, and the left and right zipper teeth 2a and 2b are engaged. By moving the slider 40 backward, zipper 1 is opened, and the left and right zipper teeth 2a and 2b are disengaged.

[0073] The zipper pull 40 includes an upper wing plate 81, a lower wing plate, and a connecting post 83 connecting the upper wing plate 81 and the lower wing plate. The connecting post 83 has front openings on its left and right sides. A rear opening is provided on the opposite side of the front openings. The insertion part 7a, described later, is inserted into the zipper pull 40 via the rear opening. The upper wing plate 81 has flanges 86 that protrude downwards and extend in the front-rear direction on its left and right side edges. The lower wing plate has flanges 86 that protrude upwards and extend in the front-rear direction on its left and right side edges. The insertion part 7b, described later, is inserted into the gap between the upper and lower flanges. When the zipper pull 40 is in a position away from the stop members 5a and 5b, the zipper tape 3b is inserted into the gap between the upper and lower flanges of the zipper pull 40.

[0074] Zipper belts 2a and 2b each include: zipper belts 3a and 3b, each equipped with zipper teeth 4a and 4b; and stop components 5a and 5b, which are fixed to the zipper belts 3a and 3b in positions adjacent to the zipper teeth 4a and 4b. The zipper belt is a long, flexible strip in the front-to-back direction, and is made of woven fabric, knitted fabric, or a mixture thereof. The zipper teeth are constructed in a manner capable of engaging with opposing teeth, for example, resin or metal teeth, or spiral teeth formed by spirally winding monofilaments. The zipper teeth are installed on the zipper belt by injection molding, riveting, sewing, or bonding. The illustrated zipper teeth are resin teeth having a base, neck, and head. The base is fixed to the side edge of the zipper belt.

[0075] The stop components 5a and 5b can be joined together in a separable manner. Each stop component 5a and 5b includes a base 6a and 6b, and an insertion portion 7a and 7b extending from the base 6a and 6b toward the zipper teeth 4a and 4b (i.e., forward). A magnetic body 30a and 30b is embedded in each base 6a and 6b (see reference). Figure 5 and Figure 6 The magnetic bodies 30a and 30b have different shapes; here, magnetic body 30a has a cylindrical shape, and magnetic body 30b has a plate-like shape. As described above, the insertion part 7a is inserted into the pull head 40 through the rear opening. The insertion part 7b is inserted into the pull head 40 through the gap between the flange of the upper wing plate 81 and the flange of the lower wing plate. Furthermore, the structures of the stop components 5a and 5b can also be reversed from left to right.

[0076] The base 6a of the left-side stop code member 5a has a shaft-shaped protrusion 11 in which a magnetic body 30a is embedded. The shaft-shaped protrusion 11 is disposed downward. The base 6b of the right-side stop code member 5b has a recess 21 directly below the bottom surface 21b where the magnetic body 30a is disposed. Figures 1-5 , Figure 6 The magnetic material in the base of the stop code component shown is a permanent magnet obtained by magnetizing an unmagnetized magnetic material (hereinafter, the magnetic materials 30a and 30b are sometimes referred to as permanent magnets 30a and 30b). Therefore, when the base 6a of the left stop code component 5a and the base 6b of the right stop code component 5b are positioned close in space (for example, when the base 6b is positioned below the base 6a), the bases 6a and 6b are stacked due to the magnetic attraction generated between the permanent magnet 30b of the base 6b and the permanent magnet 30a of the base 6a, and the axial protrusion 11 of the base 6a fits into the recess 21 of the base 6b.

[0077] The permanent magnets 30a and 30b can be rare-earth magnets such as neodymium magnets. The permanent magnets 30a and 30b have a pair of main surfaces 34 and 35 arranged intersecting magnetic axes AX1 and AX2 (or defining the thickness of the permanent magnets) and a side surface 36 connecting the outer periphery of the pair of main surfaces 34 and 35 (see reference). Figure 5 and Figure 6 There are a total of 3 faces. Side face 36 extends along magnetic axes AX1 and AX2 at a position radially outside of magnetic axes AX1 and AX2, connecting the outer periphery of main face 34 and the outer periphery of main face 35.

[0078] The magnetic axes AX1 and AX2 of the permanent magnets 30a and 30b are aligned with the central axes of the magnetic bodies 30a and 30b. The magnetic axis is an axis extending in the direction of the N and S poles of the permanent magnet, determined based on the magnetic field lines generated around the permanent magnet. The central axis AX1 of the magnetic body 30a is aligned with the central axis of the shaft-shaped protrusion 11. The central axis AX2 of the magnetic body 30b is aligned with the depth direction of the recess 21. Furthermore, the permanent magnets 30a and 30b can also be formed in prism or polygonal plate shapes. Other shapes such as cones, pyramids, or spheres can also be used.

[0079] Base 6a has an outer peripheral portion 12 surrounding the axial protrusion 11. Sliding portions 13p, 13q, and 13r are provided on the outer peripheral portion 12. Base 6b has an outer peripheral portion 22 surrounding the recess 21. Inclined surfaces 23p, 23q, and 23r are provided on the outer peripheral portion 22. As described above, during the process of the axial protrusion 11 engaging with the recess 21 due to magnetic attraction between permanent magnets, the sliding portions 13p, 13q, and 13r contact the inclined surfaces 23p, 23q, and 23r, and the sliding portions 13p, 13q, and 13r move up and down on the inclined surfaces 23p, 23q, and 23r, thereby causing base 6b to rotate relative to base 6a. It can be said that the magnetic attraction acting in the axial direction is converted into a rotational force around the axial direction.

[0080] The insertion part 7a is configured to have an opening on the right side to accommodate the insertion part 7b. For example... Figure 3 As shown, the insertion part 7a has an upper plate 14 and a lower plate 15, and an insertion space 16 is defined between them. Additionally, as... Figure 2 As shown, a lever portion 8a is provided adjacent to the insertion portion 7a on both the upper and lower surfaces of the zipper tape 3a, and a flange passage is defined on both the upper and lower surfaces of the zipper tape 3a. The lever portion 8a extends forward from the base 6a in the same manner as the insertion portion 7a. The flange of the zipper pull 40 is inserted into the flange passage between the insertion portion 7a and the lever portion 8a, promoting the zipper pull 40 to remain on the insertion portion 7a.

[0081] The insertion portion 7b has a tapered insertion end that extends to the left away from the zipper tape 3b, allowing it to be smoothly inserted into the gap between the upper and lower flanges on the right side of the zipper head 40. The pseudo-zipper teeth 4b' engage with the front end of the insertion portion 7b, enabling the zipper head 40 to move smoothly from the stop block onto the zipper teeth 4a and 4b. A lever portion 8b is connected to the insertion portion 7b on the opposite side of the insertion end. The lever portion 8b protrudes from both the upper and lower surfaces of the zipper tape 3b, colliding with the upper and lower flanges on the right side of the zipper head 40. The stopping position of the insertion portion 7b inserted into the zipper head 40 is determined by the lever portion 8b.

[0082] like Figure 7 As shown, when the slider 40 is positioned at its rearmost end (i.e., when the insertion part 7a is inserted into the slider 40), if the base 6b is positioned below the base 6a, a magnetic attraction is generated between the permanent magnet 30a of the base 6b and the permanent magnet 30b of the base 6a. The bases 6a and 6b are stacked due to this magnetic attraction, and the axial protrusion 11 of the base 6a engages with the recess 21 of the base 6b. During the engagement of the axial protrusion 11 with the recess 21 (i.e., during the process of the bases 6a and 6b approaching each other along the axial direction), the sliding parts 13p, 13q, and 13r contact the inclined surfaces 23p, 23q, and 23r, and the sliding parts 13p, 13q, and 13r move up and down on the inclined surfaces 23p, 23q, and 23r. Correspondingly, the base 6b rotates counterclockwise relative to the base 6a, and the insertion part 7b is inserted into the zipper head 40 through the gap between the upper and lower flanges on the right side of the zipper head 40. By advancing the zipper head 40, the insertion part 7b is inserted into the insertion space 16 of the insertion part 7a, and the left and right stop components 5a and 5b engage. If the zipper head 40 advances further, the left and right zipper teeth 4a and 4b engage.

[0083] Sliding parts 13p, 13q, and 13r are arranged circumferentially around the magnetic axis AX1 of the permanent magnet 30a. Similarly, inclined surfaces 23p, 23q, and 23r are arranged circumferentially around the magnetic axis AX2 of the permanent magnet 30b. Each inclined surface is inclined as it extends circumferentially along the magnetic axis AX2 of the permanent magnet 30b. The sliding parts 13p, 13q, and 13r slide (move downwards) on the inclined surfaces 23p, 23q, and 23r due to the magnetic attraction of the permanent magnets 30a and 30b. By providing three sliding parts, rotational stability is improved, but only one sliding part can also be provided. The same applies to the inclined surfaces. Of course, it is also possible to omit the sliding parts and inclined surfaces and manually rotate the base 6b relative to the base 6a. The permanent magnets 30a and 30b are arranged in a manner that aligns their magnetic axes AX1 and AX2, thus the axial protrusion 11 and the recess 21 can also be omitted.

[0084] The base 6a has a guide portion 17, which is disposed adjacent to the rear of the insertion portion 7a and protrudes downward in the same manner as the shaft-shaped protrusion 11. The guide portion 17 has a guide surface that is provided in such a way as to define a groove that spatially communicates with the opening of the insertion portion 7a and slopes downward toward the right. When the bases 6a and 6b are magnetically attracted to each other, there is a case where the insertion portion 7b is disposed on the guide surface of the guide portion 17. In this case, the insertion portion 7b can also move downward on the guide surface of the guide portion 17 and pivot clockwise to the right. When the insertion portion 7b finishes moving downward on the guide surface of the guide portion 17, it can enter the slider 40 through the gap between the upper and lower flanges on the right side of the slider 40 in the same manner as described above.

[0085] In this embodiment, the base 6a includes a first resin portion 41a and a second resin portion 42a (see reference). Figure 2 , Figure 3 and Figure 5 The first resin portion 41a and the second resin portion 42a can be identified based on the interface formed between them. The first resin portion 41a and the second resin portion 42a are respectively provided in a manner that covers at least one surface of the magnetic body 30a in distinct first and second regions 31 and 32 (see reference). Figure 17 This allows for the suppression of increased resin thickness around the magnetic body 30a and strengthens the retention structure of the magnetic body 30a in the stop member 5a. Specifically, the thickness of the first resin portions 41a and 41b and the second resin portions 42a and 42b can be increased on at least one surface of the magnetic body 30a, and the second resin portions 42a and 42b can be inserted between the first resin portions 41a and 41b to promote a firm connection between them. Compared to the case where the magnetic body is housed in a recess and the recess is closed with a cover, the structure required for fixing the cover (e.g., the recess into which the claw engages) itself can be omitted.

[0086] Specifically, when the first resin portion 41a covers the first region 31, the first resin portion 41a is in direct contact with the first region 31 (without any gap between them). Similarly, when the second resin portion 42a covers the second region 32, the second resin portion 42a is in direct contact with the second region 32 (without any gap between them). The first resin portion 41a and the second resin portion 42a can be formed using the same resin material, but can be identified based on the interface formed between them. The second region 32 can be ensured, for example, by contact between a magnetic material and the mold surface during a single injection molding process.

[0087] The same explanation applies to the base 6b. The above explanation is read by replacing the base 6a, magnetic body 30a, first resin part 41a, and second resin part 42a with the base 6b, magnetic body 30b, first resin part 41b, and second resin part 42b, and repeated explanations are omitted. Regarding the base 6b, refer to... Figure 1 , Figure 4 , Figure 6 .exist Figure 6 The image shows that in each of the main surfaces 34 and 35 of the magnetic body 30b, the first region 31 is covered by the first resin portion 41b and the second region 32 is covered by the second resin portion 42b.

[0088] At least one surface (e.g., the main surface and / or side surface) of the permanent magnets 30a and 30b can be complementaryly covered by the first resin portions 41a and 41b and the second resin portions 42a and 42b. This avoids the situation where the surfaces of the permanent magnets 30a and 30b are not covered by the first and second resin portions, resulting in partial exposure in the stop members 5a and 5b. Alternatively, it eliminates the need to provide additional resin portions to suppress such exposure. The advantage is that in each of the main surfaces 34 and 35 and the side surface 36 of the permanent magnets 30a and 30b (in other words, all surfaces), the first region 31 and the second region 32 are respectively covered by the first resin portions 41a and 41b and the second resin portions 42a and 42b.

[0089] The first resin portions 41a and 41b may have more than one exposed surface that is not covered by the second resin portions 42a and 42b and is exposed in the stop components 5a and 5b. There are limitations on the thickness of the resin portions surrounding the magnetic bodies 30a and 30b, where making the first resin portions 41a and 41b thicker ensures their strength. Furthermore, the exposed surfaces of the first resin portions 41a and 41b are ensured through contact between the molded part and the mold surface during two injection molding processes. From the viewpoint of suppressing molding defects, it is preferable that the exposed surfaces of the first resin portions 41a and 41b or the exposed surfaces of the second resin portions 42a and 42b extend radially along the central axis of the magnetic bodies 30a and 30b.

[0090] The following is a more detailed explanation. For example... Figure 1 As shown, the bottom surface 21b of the recess 21 of the base 6b is formed by a combination of the exposed surfaces of the first resin portion 41b and the second resin portion 42b. In the bottom surface 21b of the recess 21, the first resin portion 41b has exposed surfaces formed radially (Y-shaped). The radially exposed surfaces have a central surface and multiple extending surfaces extending radially outward from the central surface. The exposed surfaces of the second resin portions 42b are located between the extending surfaces. The exposed surfaces of the second resin portions 42b are arranged at equal intervals in the circumferential direction around the central axis AX2 of the magnetic body 30b. Thus, the bottom surface 21b of the recess 21 is formed by the radially exposed surfaces of the first resin portions 41b and a total of three exposed surfaces of the second resin portions 42b.

[0091] like Figure 4As shown, the lower surface of the base 6b on the side opposite to the recess 21 is composed of a combination of exposed surfaces of the first resin portion 41b and the second resin portion 42b. In the lower surface of the base 6b on the side opposite to the recess 21, the second resin portion 42b has exposed surfaces formed in a radial (Y-shape). The radial exposed surfaces include a central surface and multiple extending surfaces extending radially outward from the central surface. The width of the extending surfaces differs in the radially inner and radially outer regions. As the extending surfaces move away from the central surface, the width gradually decreases, and after crossing the boundary between the radially inner and radially outer regions, the width of the extending surfaces increases sharply. The radially outer region of the extending surfaces is formed in a fan shape. Exposed surfaces of the first resin portion 41b exist between the extending surfaces. Each exposed surface of the first resin portion 41b extends radially outward relative to the central axis AX2 of the magnetic body 30b. Therefore, it can be said that a total of three exposed surfaces of the first resin portion 41b are formed radially. The three exposed surfaces of the first resin portion 41b are arranged at equal intervals in the circumferential direction around the central axis AX2 of the magnetic body 30b. In this way, the lower surface of the base 6b is formed by the radial exposed surfaces of the second resin portion 42b and the three exposed surfaces of the first resin portion 41b.

[0092] Furthermore, on the lower surface side of the base 6b, the first resin portion 41b and the second resin portion 42b are stacked along the central axis AX2 of the magnetic body 30b, that is, the first resin portion 41b is covered by the second resin portion 42b. This facilitates the smooth flow of the molten resin to become the second resin portion 42b into the groove between the first resin portions 41b. As a result, a strong connection between the first and second resin portions is achieved, and the retaining structure of the magnetic body is strengthened. On the upper surface side of the base 6b, the first resin portion 41b can also be covered by the second resin portion 42b in the same manner as described above.

[0093] like Figure 2 As shown, the top surface and / or side surface of the axial protrusion 11 are formed by a combination of the exposed surfaces of the first resin portion 41a and the second resin portion 42a. On the top surface of the axial protrusion 11, the second resin portion 42a has an exposed surface formed in a radial (Y-shape). The radial exposed surface includes a central surface and a plurality of extended surfaces extending radially outward from the central surface. The exposed surface of the first resin portion 41a is located between the extended surfaces. The exposed surfaces of the first resin portion 41a are arranged at equal intervals in the circumferential direction around the central axis AX1 of the magnetic body 30a.

[0094] On the side of the axial protrusion 11, the exposed surfaces of the first resin portion 41a and the second resin portion 42a are alternately arranged circumferentially around the central axis AX1 of the magnetic body 30a. The exposed surfaces of the first resin portion 41a and the second resin portion 42a are formed over both the top surface and the side surface of the axial protrusion 11. Therefore, the sidewall of the axial protrusion 11 is formed by the alternating circumferential arrangement of the wall portions of the first resin portion 41a and the wall portions of the second resin portion 42a around the central axis AX1 of the magnetic body 30a. There is a limitation on the thickness of the resin portion around the magnetic body 30a, in which each resin portion can be formed thicker to ensure the strength of the resin portion around the magnetic body 30a.

[0095] Furthermore, on the top surface side of the axial protrusion 11, the first resin portion 41a and the second resin portion 42a are stacked along the central axis AX1 of the magnetic body 30a, that is, the first resin portion 41b is covered by the second resin portion 42b. This facilitates the smooth flow of the molten resin to become the second resin portion 42a into the groove between the first resin portions 41a. As a result, a strong connection between the first and second resin portions is achieved, and the retaining structure of the magnetic body is strengthened. On the main surface of the magnetic body 30a, opposite to the top surface of the axial protrusion 11, the first resin portion 41a and the second resin portion 42a are also stacked.

[0096] Because the magnetic attraction between permanent magnets 30a and 30b is increased, the resin portion can be made thinner on the main surface of the permanent magnet 30a on the top side of the axial protrusion 11, and similarly, the resin portion can be made thinner on the main surface of the permanent magnet 30b on the bottom side of the recess 21. However, from the viewpoint of ensuring strength, there are limitations on the thickness of the resin portion. As described above, the first resin portion and the second resin portion respectively cover the first and second regions of the surface with the magnetic body, thereby promoting the achievement of the desired thickness of the first and second resin portions within the existing limitations on resin thickness. The first resin portion and the second resin portion are not uselessly stacked, which can suppress the enlargement of the stop code member. At this time, the first resin portion is covered by the second resin portion on the central axis of the magnetic body (the magnetic axis of the permanent magnet). This promotes the smooth flow of the second resin portion into the groove between the first resin portions. Furthermore, by ensuring that the first resin portion is not covered by the second resin portion to the point where there is no exposed surface, the enlargement of the stop code member can be suppressed.

[0097] The shape, location, extent, and number of exposed surfaces of the first resin portions 41a and 41b can be varied. The same applies to the exposed surfaces of the second resin portions 42a and 42b. On the upper surface of the base 6a, the first resin portion 41a does not have an exposed surface, but the first resin portion 41a may also have an exposed surface.

[0098] Each zipper tooth and chain strap 2a, 2b (and stop parts 5a, 5b) as follows Figure 8 The device shown can be manufactured by injection molding of the stop component and subsequent magnetization (i.e., magnetization) of the magnetic material. During injection molding, problems that arise when using permanent magnets can be avoided by using an unmagnetized magnetic material. For example, when using an unmagnetized magnetic material, it will not magnetically contact surrounding magnetic components during transport using a chuck or jig. Furthermore, it is not necessary to verify the magnetism of the mold. Regarding magnetization, a strong magnetic field is generated using an electromagnet, which can be achieved by configuring a stop component with an embedded unmagnetized magnetic material.

[0099] Injection molding can be performed in two stages: single injection molding and two injection molding. For example... Figure 9 and Figure 10 As shown, in a single injection molding process, magnetic bodies 30a and 30b are disposed within a molding cavity defined by upper and lower molds 18 and 19. Preferably, magnetic bodies 30a and 30b are clamped and held between the lower mold 18 and the upper mold 19 to suppress their displacement. Furthermore, an appropriate clamping force is set to clamp the magnetic bodies 30a and 30b.

[0100] The first region 31 of the surfaces (e.g., main surfaces 34, 35 and side surface 36) of the magnetic bodies 30a and 30b is exposed within the molding cavity. The second region 32 of the surfaces (e.g., main surfaces 34, 35 and side surface 36) of the magnetic bodies 30a and 30b is in contact with the surface of the lower mold 18 or the upper mold 19. Molten resin flows into the molding cavity through the gate, and then the molten resin is solidified by cooling the upper and lower molds. In this way, a one-piece molded article 60a is obtained (see reference). Figures 13 to 17 ) and 60b (refer to) Figures 18 to 21 The first resin portion 41a is fixed to the first region 31. The first resin portion 41a is not fixed to the second region 32. The second region 32 is not covered by the first resin portion 41a and remains exposed.

[0101] like Figure 11 and Figure 12 As shown, during two-stage injection molding, the primary molded articles 60a and 60b are positioned within the molding cavity defined by the upper and lower molds 18. Preferably, the primary molded articles 60a and 60b are held between the lower mold 18 and the upper mold 19 to suppress their displacement. A second region 32 of the surfaces (e.g., main surfaces 34 and 35 and side surfaces 36) of the primary molded articles 60a and 60b is exposed within the molding cavity. The first resin portions 41a and 41b of the primary molded articles 60a and 60b partially contact the surface of the lower mold 18 or the upper mold 19. The contact surfaces of the first resin portions 41a and 41b become the exposed surfaces of the first resin portions 41a and 41b in the stop-weight component.

[0102] Molten resin flows into the molding cavity through the gate, and then solidifies by cooling the upper and lower molds. This produces stop components 5a and 5b (and simultaneously, zipper teeth 2a and 2b with stop components 5a and 5b fixed to them). Second resin portions 42a and 42b are fixed to the second region 32. The second resin portions 42a and 42b are not limited to magnetic bodies 30a and 30b, but are also fixed to the first resin portions 41a and 41b. Furthermore, the side edges of the zipper teeth 3a and 3b are also disposed in the molding cavity of the two-stage injection molding process, resulting in the stop components 5a and 5b being fixed to the zipper teeth 3a and 3b.

[0103] By reference Figures 13 to 17 The one-piece molded article 60a shown can be understood to have its main surfaces 34 and 35 and side surfaces 36 of the magnetic body 30a complementaryly covered by the first resin portion 41a and the second resin portion 42a, respectively. Furthermore, it can be understood that the first resin portion 41a is configured to accommodate the magnetic body 30a, and the second resin portion 42a constitutes the remaining portion of the stop component 5a other than the first resin portion 41a.

[0104] The single-molded article 60a includes covering portions 64 and 65 covering the main surfaces 34 and 35 of the magnetic body 30a, and multiple wall portions 66 covering the side surfaces 36 of the magnetic body 30a. The covering portions 64 and 65 are connected via the multiple wall portions 66. In the main surface 34 of the magnetic body 30a, the first region 31 is larger than the second region 32. The same applies to the main surface 35 and the side surfaces 36 of the magnetic body 30a. In this way, by making the first region 31 larger than the second region 32, the stability of the single-molded article 60a on the lower mold 18 during secondary injection molding is improved. Furthermore, the covering portions 64 and 65 and the wall portions 66 are in close contact with each surface of the magnetic body 30a.

[0105] Grooves 64a and 65a extending radially inward are provided in the cover portions 64 and 65, respectively. Grooves 64a are formed such that the main surface 34 of the magnetic body 30a is exposed at its outer periphery. The same applies to groove 65a. In the central portion of the cover portion 65, the first resin portion 41a is formed thinner, and the grooves 65a are spatially connected to each other (resulting in Y-shaped grooves). Therefore, during the second injection molding, the molten resin can flow smoothly into the grooves 65a. A longitudinal groove 66a is formed between adjacent circumferential wall portions 66. The longitudinal groove 66a is connected to the groove 65a, forming a groove that extends continuously throughout the side surface 36 and main surface 35 of the magnetic body 30a. The longitudinal groove 66a is also connected to the slot between the connecting portions 62 (described later), allowing the molten resin to flow more freely during the second injection molding.

[0106] The cover portion 65 includes a central portion 65p and a plurality of extensions 65q extending radially outward from the central portion 65p. The central portion 65p is thinner than the extensions 65q, ensuring spatial communication between the three slots 65a on the central portion 65p. The extensions 65q increase in width as they extend radially outward, more specifically, having a fan-shaped shape. Thus, the slots 65a can extend substantially with a fixed width radially.

[0107] The single-molded article 60a may have an annular flange 61 protruding radially outward from the central axis AX1 of the magnetic body 30a. The annular flange 61 is connected to the outer periphery of the cover portion 64 via a plurality of connecting portions 62. By providing the annular flange 61, the single-molded article 60a can be stably held by a chuck or clamp. The annular flange 61 can impede the flow of molten resin during secondary injection molding. Therefore, a groove 63 may also be formed on the inner side of the annular flange 61 (for example, between the annular flange 61 and the cover portion 64). Molten resin can also flow into the longitudinal groove 66a through the slots between the connecting portions 62. Furthermore, in the example shown, the grooves 64a and 65a are provided non-overlapping and complementary in the circumferential direction, but this is not a limitation. That is, the groove 64a may be arranged between adjacent grooves 65a in the circumferential direction, or vice versa.

[0108] By reference Figures 18 to 21 In the single-molded article 60b shown, it can be understood that the main surfaces 34 and 35 and the side surface 36 of the magnetic body 30b are complementaryly covered by the first resin portion 41b and the second resin portion 42b, respectively. In addition, it can be understood that the first resin portion 41b is configured to accommodate the magnetic body 30b, and the second resin portion 42b constitutes the remaining portion of the stop member 5b other than the first resin portion 41b.

[0109] The description of the single-molded article 60a also generally applies to the single-molded article 60b, and repeated descriptions are omitted. For example, the first region 31 is larger than the second region 32, the cover portions 64 and 65 are provided with grooves extending radially inward, and the cover portion 65 includes a central portion 65p and a plurality of extension portions 65q. This applies not only to the single-molded article 60a but also to the single-molded article 60b. However, unlike the single-molded article 60a, in the single-molded article 60b, the cover portion 64 is formed radially, and the width of the extension portions 65q is substantially fixed.

[0110] The covering portion 64 includes a central portion 64p and a plurality of extensions 64q extending radially outward from the central portion 64p. The central portion 64p is not thinner than the extensions 64q, and spatial communication between the (3) slots 64b is blocked by the central portion 64p. The extensions 64q have a fixed width and extend radially outward. Therefore, the slots 64b between the extensions 64q are formed into a fan shape that is narrower radially inward and wider radially outward. A slot is formed by connecting the slots 64b, longitudinal slots 66b, and slots 65b and extending over the main surface 34, side surface 36, and main surface 35 of the magnetic body 30b.

[0111] The one-piece molded articles 60a and 60b are not limited to the shapes shown in the illustrations, and can be transformed into various other shapes.

[0112] Those skilled in the art can understand the zipper manufacturing method based on the technical level at the time of application and the above description, especially the manufacturing method of the stop-code component. The following describes the unique improvements in relation to the stop-code component of this application.

[0113] The timing for magnetizing the magnetic bodies 30a and 30b embedded in the stop components is most advantageous after assembling the zipper 1 using a pair of zipper teeth. In the zipper 1, the stop components 5a and 5b are joined together, and the bases 6a and 6b are stacked. Therefore, the magnetic bodies 30a in the base 6a and 30b in the base 6b are also arranged vertically with a gap between them. In this state, a magnetic field with a fixed direction (e.g., a magnetic field in which the magnetic lines of force extend in the vertical direction) is applied to the rear end of the zipper 1. Thus, as can be seen by referring to... Figure 5 and Figure 6 As is well understood, the lower half of magnetic body 30a becomes the S pole (first pole), and the upper half becomes the N pole (second pole). Similarly, the lower half of magnetic body 30b becomes the S pole (first pole), and the upper half becomes the N pole (second pole). By applying a magnetic field with a fixed direction to the rear end of the assembled zipper 1, the magnetic bodies 30a and 30b are prevented from being magnetized in opposite directions with respect to the N pole and the S pole, respectively.

[0114] Furthermore, the magnetic bodies 30a and 30b before magnetization are referred to as unmagnetized magnetic bodies, but they can also be simply magnetic bodies after magnetization. Unmagnetized magnetic bodies 30a and 30b are not limited to those that do not generate a magnetic field at all; they can also be magnetic bodies that generate a magnetic field with a relatively small magnetic flux density.

[0115] Based on the foregoing teachings, those skilled in the art can make various modifications to the embodiments. The reference numerals incorporated in the claims are for reference only and should not be used for the purpose of limiting the scope of the claims.

Claims

1. A zipper tooth tape, characterized in that, The zipper teeth (2a, 2b) include: Zipper tapes (3a, 3b) are provided with zipper teeth (4a, 4b); and The stop components (5a, 5b) are fixed to the zipper tape (3a, 3b) at a position adjacent to the zipper teeth (4a, 4b). The stop code components (5a, 5b) include: magnetic bodies (30a, 30b); and bases (6a, 6b) on which the entire magnetic body (30a, 30b) is embedded. The base (6a, 6b) includes a first resin portion (41a, 41b) and a second resin portion (42a, 42b), which can be identified based on the interface formed between them. The first resin portion (41a, 41b) and the second resin portion (42a, 42b) are respectively fixed to a first region (31) and a second region (32) of at least one surface (34, 35, 36) of the magnetic body (30a, 30b), respectively, and the first region (31) and the second region (32) are respectively covered by the first resin portion (41a, 41b) and the second resin portion (42a, 42b).

2. The zipper tooth tape according to claim 1, characterized in that: At least one surface (34, 35, 36) of the magnetic body (30a, 30b) is complementaryly covered by the first resin portion (41a, 41b) and the second resin portion (42a, 42b).

3. The zipper tooth tape according to claim 1 or 2, characterized in that: In each of the surfaces (34, 35, 36) of the magnetic body (30a, 30b), the first region (31) and the second region (32) are respectively covered by the first resin portion (41a, 41b) and the second resin portion (42a, 42b).

4. The zipper tooth tape according to claim 1 or 2, characterized in that: The first resin portion (41a, 41b) has one or more exposed surfaces that are not covered by the second resin portion (42a, 42b).

5. The zipper tooth tape according to claim 4, characterized in that: The exposed surface extends radially along the central axis (AX1, AX2) of the magnetic bodies (30a, 30b).

6. The zipper tooth tape according to claim 1 or 2, characterized in that: The second resin portion (42a, 42b) has an exposed surface extending radially along the central axis (AX1, AX2) of the magnetic body (30a, 30b).

7. The zipper tooth tape according to claim 1 or 2, characterized in that: The first resin portion (41a, 41b) and the second resin portion (42a, 42b) are stacked on the central axis (AX1, AX2) of the magnetic body (30a, 30b).

8. The zipper tooth tape according to claim 1 or 2, characterized in that: The base (6a) has an axial protrusion (11) in which the magnetic body (30a) is embedded. The top surface of the axial protrusion (11) includes the exposed surfaces of the first resin portion (41a, 41b) and the second resin portion (42a, 42b).

9. The zipper tooth tape according to claim 1 or 2, characterized in that: The base (6a) has an axial protrusion (11) in which the magnetic body (30a) is embedded. The sidewall of the axial protrusion (11) is formed by alternating circumferential arrangements of the wall portions of the first resin portion (41a, 41b) and the wall portions of the second resin portion (42a, 42b).

10. The zipper tooth tape according to claim 1 or 2, characterized in that: The base (6b) has a recess (21), and the magnetic body (30b) is disposed directly below the bottom surface (21b) of the recess (21). The bottom surface (21b) of the recess (21) includes the exposed surfaces of the first resin portion (41a, 41b) and the second resin portion (42a, 42b).

11. The zipper tooth tape according to claim 1 or 2, characterized in that: The first resin portion (41a, 41b) is configured to accommodate the magnetic body (30a, 30b). The second resin portion (42a, 42b) constitutes the remaining portion of the stop code component (5a, 5b) other than the first resin portion (41a, 41b).

12. The zipper tooth tape according to claim 1 or 2, characterized in that: The magnetic bodies (30a, 30b) are permanent magnets having a pair of main surfaces (34, 35) arranged intersecting the central axes (AX1, AX2) of the magnetic bodies (30a, 30b) and a side surface (36) connecting the outer periphery of the pair of main surfaces (34, 35).

13. The zipper tooth tape according to claim 1 or 2, characterized in that: The stop code components (5a, 5b) have insertion portions (7a, 7b) extending from the base (6a, 6b) toward the zipper teeth (4a, 4b). The insertion portions (7a, 7b) are configured to be inserted into the zipper head via the rear opening of the zipper head, or to be inserted into the zipper head via the gap between the flange of the upper wing plate and the flange of the lower wing plate.

14. A zipper, characterized in that, The zipper (1) includes: a pair of zipper teeth (2a, 2b); and a slider movable to open and close the pair of zipper teeth (2a, 2b). The pair of zipper teeth (2a, 2b) are respectively the zipper teeth (2a, 2b) of claim 1, which are provided with permanent magnets as magnetic bodies (30a, 30b). A permanent magnet is provided in a pair of stop components (5a, 5b) included in the pair of zipper teeth (2a, 2b). The permanent magnets are magnetically attracted to each other, causing the pair of stop components (5a, 5b) to stack. One of the pair of stop components (5a, 5b) has inclined surfaces (23p, 23q, 23r) that slope as they extend circumferentially about the central axes (AX1, AX2) of the permanent magnet. The other of the pair of stop components (5a, 5b) has a sliding portion (13p, 13q, 13r) that slides on the inclined surfaces (23p, 23q, 23r) due to the magnetic attraction of the permanent magnets of the pair of stop components (5a, 5b).

15. A method for manufacturing a stop code component, characterized in that, The stop-code components (5a, 5b) are to be fixed to, or have been fixed to, the zipper tapes (3a, 3b) of the zipper teeth (2a, 2b), and the manufacturing method of the stop-code components (5a, 5b) includes: The process of injection molding the stop code components (5a, 5b) by embedding magnetic materials (30a, 30b); and The process of applying a magnetic field to the stop components (5a, 5b) after injection molding to magnetize the magnetic bodies (30a, 30b) is described. The injection molding process includes at least two injection molding processes. In the initial injection molding, the first resin portion (41a, 41b) is fixed to a first region (31) of at least one surface (34, 35, 36) of the magnetic body (30a, 30b), thereby covering the first region (31). In the second injection molding, the second resin portion (42a, 42b) is fixed to the second region (32) of at least one surface (34, 35, 36) of the magnetic body (30a, 30b), thereby covering the second region (32).

16. A method for manufacturing a zipper, characterized in that, The zipper has a magnetically attachable and detachable stop key, and the method of manufacturing the zipper includes: The process of assembling the zipper teeth and straps as described in claim 1 in pairs; and The process of magnetizing the magnetic material embedded in each stop component by applying a magnetic field with a fixed direction to the coupled stop components of the zipper chain.

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