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DE-112020007865-B4 - Zipper longitudinal section, zipper, and method for manufacturing limit section and zipper

DE112020007865B4DE 112020007865 B4DE112020007865 B4DE 112020007865B4DE-112020007865-B4

Abstract

Zipper longitudinal section (2a, 2b), comprising: a support belt (3a, 3b) which is equipped with a coupling element (4a, 4b); and a limiting part (5a, 5b) which adheres to the support belt (3a, 3b) in a position adjacent to the dome member (4a, 4b), wherein the boundary part (5a, 5b) has a magnetic body (30a, 30b) and a base section (6a, 6b) in which the magnetic body (30a, 30b) is completely embedded, the base section (6a, 6b) has a first and a second resin section (41a, 41b, 42a, 42b) which are distinguishable on the basis of an interface formed between the first and the second resin section (41a, 41b, 42a, 42b), and the first and second resin sections (41a, 41b, 42a, 42b) are arranged such that they cover a first and a second area (31, 32), which are separated from each other, on at least one surface (34, 35, 36) of the magnetic body (30a, 30b), wherein which at least one surface (34, 35, 36) of the magnetic body (30a, 30b) is covered in a complementary manner by the first and second resin sections (41a, 41b, 42a, 42b).

Inventors

  • Yuchen Tung
  • Kazuo Tamura

Assignees

  • YKK CORPORATION

Dates

Publication Date
20260513
Application Date
20201224

Claims (15)

  1. Zipper longitudinal section (2a, 2b) comprising: a carrying strap (3a, 3b) which is provided with a coupling element (4a, 4b); and a limiting part (5a, 5b) which adheres to the support belt (3a, 3b) in a position adjacent to the coupling member (4a, 4b), wherein the limiting part (5a, 5b) comprises a magnetic body (30a, 30b) and a base section (6a, 6b) in which the magnetic body (30a, 30b) is completely embedded, the base section (6a, 6b) comprises a first and a second resin section (41a, 41b, 42a, 42b) which are distinguishable on the basis of an interface formed between the first and the second resin section (41a, 41b, 42a, 42b), and the first and the second resin section (41a, 41b, 42a, 42b) are arranged such that they form a first and a second region (31, 32), respectively, which are separated from each other, on at least one Covering the surface (34, 35, 36) of the magnetic body (30a, 30b), wherein at least one surface (34, 35, 36) of the magnetic body (30a, 30b) is covered in a complementary manner by the first and second resin sections (41a, 41b, 42a, 42b).
  2. Zipper lengthwise section to Claim 1 , wherein the first and second areas (31, 32) on each surface (34, 35, 36) of the magnetic body (30a, 30b) are covered by the first and second resin sections (41a, 41b, 42a, 42b), respectively.
  3. Zipper lengthwise section to Claim 1 or 2 , wherein the first resin section (41a, 41b) has one or more exposed surfaces that are not covered by the second resin section (42a, 42b).
  4. Zipper lengthwise section to Claim 3 , wherein the exposed area extends radially with respect to a central axis (AX1, AX2) of the magnetic body (30a, 30b).
  5. Zipper lengthwise section after one of the Claims 1 until 4 , wherein the second resin section (42a, 42b) has an exposed surface extending radially with respect to a central axis (AX1, AX2) of the magnetic body (30a, 30b).
  6. Zipper lengthwise section after one of the Claims 1 until 5 , wherein a layering section of the first and second resin sections (41a, 41b, 42a, 42b) is provided on a central axis (AX1, AX2) of the magnetic body (30a, 30b).
  7. Zipper lengthwise section after one of the Claims 1 until 6 , wherein the base section (6a) has an axial projection (11) in which the magnetic body (30a) is embedded, and an upper surface of the axial projection (11) has exposed surfaces of the first and second resin sections (41a, 41b, 42a, 42b).
  8. Zipper lengthwise section after one of the Claims 1 until 7 , wherein the base section (6a) has an axial projection (11) in which the magnetic body (30a) is embedded, and a side wall of the axial projection (11) is formed by alternating arrangement of a wall of the first resin section (41a, 41b) and a wall of the second Harz section (42a, 42b) is designed in a circumferential direction.
  9. Zipper lengthwise section after one of the Claims 1 until 8 , wherein the base section (6b) has a recess (21) with a bottom surface (21b), wherein the magnetic body (30b) is arranged directly below the bottom surface (21b) and the bottom surface (21b) of the recess (21) has exposed surfaces of the first and second resin sections (41a, 41b, 42a, 42b).
  10. Zipper lengthwise section after one of the Claims 1 until 9 , wherein the first resin section (41a, 41b) is designed to receive the magnetic body (30a, 30b), and the second resin section (42a, 42b) forms a remainder of the boundary part (5a, 5b) which is different from the first resin section (41a, 41b).
  11. Zipper lengthwise section after one of the Claims 1 until 10 , wherein the magnetic body (30a, 30b) is a permanent magnet having a pair of principal surfaces (34, 35) arranged to intersect a magnetic axis (AX1, AX2) and a side surface (36) connecting outer edges of the principal surfaces (34, 35) of the pair.
  12. Zipper lengthwise section after one of the Claims 1 until 11 , wherein the limiting part (5a, 5b) has an insert (7a, 7b) extending from the base section (6a, 6b) towards the coupling member (4a, 4b), and the insert (7a, 7b) is designed to be inserted into the interior of the valve through a rear opening of the valve, or is designed to be inserted into the interior of the valve through a space between flanges of an upper plate and a lower plate of the valve.
  13. Zipper (1), comprising: a pair of zipper longitudinal parts (2a, 2b); and a slider movable for opening and closing the pair of zipper longitudinal parts (2a, 2b), each of the zipper longitudinal parts (2a, 2b) of the pair having a zipper longitudinal part (2a, 2b) Claim 1 is, in which a permanent magnet is provided as the magnet body (30a, 30b), a pair of limiting parts (5a, 5b) in the pair of zipper longitudinal parts (2a, 2b) contain the permanent magnets, such that they are magnetically attracted to each other to cause the limiting parts (5a, 5b) of the pair to stack, one of the limiting parts (5a, 5b) of the pair has an inclined surface (23p, 23q, 23r) inclined along an extent in a circumferential direction with respect to a magnetic axis (AX1, AX2) of the permanent magnet, and the other of the limiting parts (5a, 5b) of the pair has a sliding section (13p, 13q, 13r) which, according to a magnetic attraction between the permanent magnets of the limiting parts (5a, 5b) of the pair on the inclined surface (23p, 23q, 23r) glides.
  14. Method for manufacturing a zipper longitudinal part according to Claim 1 , wherein the method comprises: performing an injection molding process to produce the boundary part (5a, 5b) into which the magnetic body (30a, 30b) is embedded, wherein the injection molding process comprises at least two injection molding operations, namely an initial injection molding operation and a subsequent injection molding operation, wherein the first area (31) is covered by the first resin section (41a, 41b) during the initial injection molding operation, and the second area (32) is covered by the second resin section (42a, 42b) during the subsequent injection molding operation; and applying a magnetic field to the boundary part (5a, 5b) to magnetize the magnetic body (30a, 30b) after injection molding.
  15. Method for manufacturing a zipper with magnetically attracted but separable limiting parts, the method comprising: combining zipper longitudinal parts according to Claim 1 as a pair; and applying a magnetic field with a constant direction to boundary parts contained and coupled in the pair to magnetize magnetic bodies each embedded in the boundary parts.

Description

[Technical field] The present disclosure relates to a zipper longitudinal part, a zipper, and methods for manufacturing a limiting part and a zipper. [State of the art] There is a need to improve the user-friendliness associated with opening and closing zippers. Patent reference 1 relates to a limiting element of a zipper and discloses that simplified operation of limiting elements is enabled by means of magnets. In particular, when a first and a second base element are stacked, a magnetic attraction or repulsion is created between them, and the second base element rotates relative to the first base element. At this moment, a second insert of the second element pivots towards a gap between the upper and lower flanges of a slider. In this way, the load on the limiting element required to close the zipper would be reduced. The permanent magnets are housed in housing sections of the base elements. Patent specification 2 discloses that a magnet is attached by fitting it into a recess of a sliding contact plate. Patent literature 3 discloses a zipper with magnetically attracted elements. An elastomer containing non-magnetized particles is injection-molded, followed by the application of a magnetic field to magnetize these particles. The strength and position of the magnetic field are controlled such that the magnetized particles form a linear cluster within the elastomer. Subsequently, the elastomer is solidified and further processed to form it into coupling links. Patent literature 4 discloses that a non-magnetized magnet is attached to a tie and then magnetized. Another zipper that uses magnetic force is known from the CN 2 16 907 067 U. [Bibliography] [Patent specifications] [PTL 1] International publication WO 2019/ 175 944 A1[PTL 2] Japanese patent JP 4 152 216 B2[PTL 3] US patent US 10 709 212 B1[PTL 4] Registered Japanese utility model JP 3 078 682 U [Summary] [Technical problem] One aspect of the present disclosure aims to reinforce a structure that holds a magnetic body in a limiting part. [Solution to the problem] A zipper longitudinal section according to one aspect of the present disclosure comprises: a support belt provided with a coupling element; and a limiting section adhering to the support belt in a position adjacent to the coupling element, the limiting section comprising a magnetic body and a base section in which the magnetic body is completely embedded, the base section comprising a first and a second resin section distinguishable on the basis of an interface formed between the first and the second resin section, and the first and the second resin section being arranged such that they cover a first and a second region, respectively, which are separate from each other, on at least one surface of the magnetic body. The first and the second resin section can each directly cover the first and the second region. The respective resin sections and the respective regions can be in direct contact, and there can be no gap between the section and the region. According to the invention, at least one surface of the magnetic body is covered in a complementary manner by the first and second resin sections; in some embodiments, the first and second regions of each surface of the magnetic body are covered by the first and second resin sections, respectively. In some embodiments, the first resin section has one or more exposed surfaces that are not covered by the second resin section. The exposed surface may extend radially with respect to a central axis of the magnetic body. In some embodiments, the second resin section has an exposed surface that extends radially with respect to a central axis of the magnetic body. In certain embodiments, a layering section of the first and second resin sections is provided on a central axis of the magnetic body. In some embodiments, the base section has an axial projection in which the magnetic body is embedded, and an upper surface of the axial projection has exposed surfaces of the first and second resin sections. The base section may have an axial projection in which the magnetic body is embedded, and a side wall of the axial projection may be configured by alternating walls of the first resin section and walls of the second resin section in a circumferential direction. The base section may have a recess with a bottom surface, the magnetic body being arranged directly below the bottom surface, and the bottom surface of the recess may have exposed surfaces of the first and second resin sections. In some embodiments, (a) the base section is provided with an axial projection in which the magnetic body is at least partially embedded, and a side wall of the axial projection has a wall of the first resin section and a wall of the second resin section; or (b) the base section is provided with a recess having a bottom surface, the magnetic body being arranged directly below the bottom surface, and the bottom surface of the recess having an exposed surface of the first resin s