WO2024095482A1 - Fermeture à glissière - Google Patents

Fermeture à glissière Download PDF

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Publication number
WO2024095482A1
WO2024095482A1 PCT/JP2022/041244 JP2022041244W WO2024095482A1 WO 2024095482 A1 WO2024095482 A1 WO 2024095482A1 JP 2022041244 W JP2022041244 W JP 2022041244W WO 2024095482 A1 WO2024095482 A1 WO 2024095482A1
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WO
WIPO (PCT)
Prior art keywords
fastener
slide fastener
tape
slide
center line
Prior art date
Application number
PCT/JP2022/041244
Other languages
English (en)
Japanese (ja)
Inventor
耕平 川原田
久知 杉田
潤 志鷹
Original Assignee
Ykk株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ykk株式会社 filed Critical Ykk株式会社
Priority to PCT/JP2022/041244 priority Critical patent/WO2024095482A1/fr
Priority to CN202321335939.4U priority patent/CN220236213U/zh
Priority to CN202310620911.3A priority patent/CN117981952A/zh
Publication of WO2024095482A1 publication Critical patent/WO2024095482A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/02—Slide fasteners with a series of separate interlocking members secured to each stringer tape
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/02—Slide fasteners with a series of separate interlocking members secured to each stringer tape
    • A44B19/04—Stringers arranged edge-to-edge when fastened, e.g. abutting stringers
    • A44B19/06—Stringers arranged edge-to-edge when fastened, e.g. abutting stringers with substantially rectangular members having interlocking projections and pieces
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/24—Details
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/24—Details
    • A44B19/34—Stringer tapes; Flaps secured to stringers for covering the interlocking members

Definitions

  • This disclosure relates to a slide fastener.
  • Metal elements and resin elements are known as fastener elements for slide fasteners; the former are attached to the side edge of the fastener tape by tightening (i.e., through plastic deformation of the metal), while the latter are attached to the side edge of the fastener tape by injection molding.
  • Metal elements have a higher gloss than resin elements, and this appearance is often preferred. Of course, there are also cases where a matte, non-glossy appearance is preferred even for metal elements.
  • Patent Document 1 discloses a resin element that looks similar to a metal element. Metal elements have sufficient attachment strength even though they are narrow because they are clamped against the fastener tape. On the other hand, resin elements do not. Therefore, Patent Document 1 achieves both sufficient attachment strength and a narrow element width by providing a relatively thick portion (see reference 12 in Figure 1 of Patent Document 1) and a tapered portion (see reference 13 in Figure 1 of Patent Document 1).
  • Patent Document 2 also discloses a similar resin element.
  • a quadrilateral surface see reference 24a in FIG. 2 of Patent Document 2
  • a tapered surface see reference 24b in FIG. 2 of Patent Document 2
  • Known metal elements include the one shown in FIG. 19 of Patent Document 2 (called a single-sided metal element in Patent Document 2) and the one shown in FIG. 20 and FIG. 21 of Patent Document 2 (called a double-sided metal element in Patent Document 2).
  • Patent document 3 discloses that a single fastener element is provided with two divided sections to make the fastener element appear narrower.
  • the resin element can be made to have a similar appearance to the metal element by narrowing the width, and the sliding resistance of the slider can be reduced by the narrowing.
  • the resin element can be made to have a similar appearance to the metal element by narrowing the width, and the sliding resistance of the slider can be reduced by the narrowing.
  • the resin element can be made to have a similar appearance to the metal element by narrowing the width, and the sliding resistance of the slider can be reduced by the narrowing.
  • the resin element can be made to have a similar appearance to the metal element by narrowing the width, and the sliding resistance of the slider can be reduced by the narrowing.
  • the method of Patent Document 3 can make the fastener element look narrow, but does not achieve narrowing of the fastener element itself, and as a result, it is not possible to reduce the sliding resistance of the slider.
  • the inventors of the present application have discovered a new problem: how to further reduce the sliding resistance of the slider by further reducing the width of the fastener element.
  • a slide fastener includes a pair of left and right fastener stringers, each of which includes a fastener tape and a plurality of fastener elements attached to the side edge of the fastener tape at a predetermined pitch, each of which includes a lower element portion and an upper element portion provided below and above the plane on which the fastener tape exists, and the lower element portion includes at least one engaging portion and at least one engaged portion, and a slider that advances along the center line of the slide fastener to alternately engage the individual fastener elements included in one of the pair of left and right fastener stringers with the individual fastener elements included in the other of the pair of left and right fastener stringers, and that moves backward along the center line of the slide fastener to disengage them.
  • each fastener element includes a single elongated portion including an upper surface extending along the width direction of the slide fastener perpendicular to the center line of the slide fastener, a front side surface extending along the width direction of the slide fastener, and a rear side surface extending along the width direction of the slide fastener.
  • the upper part of each fastener element is shaped so as not to straddle the center line of the slide fastener.
  • a slide fastener comprises a pair of left and right fastener stringers, each of which includes a fastener tape and a plurality of fastener elements attached to the side edge of the fastener tape at a predetermined pitch, each of which includes a lower element portion and an upper element portion respectively provided below and above the plane in which the fastener tape exists, the lower element portion having at least one engaging portion and at least one engaged portion, and a slider which moves forward on the center line of the slide fastener to alternately engage the individual fastener elements included in one of the pair of left and right fastener stringers with the individual fastener elements included in the other of the pair of left and right fastener stringers, and which moves backward on the center line of the slide fastener to disengage them.
  • each fastener element includes an upper surface extending along the width direction of the slide fastener perpendicular to the center line of the slide fastener, a front side surface extending along the width direction of the slide fastener, a rear side surface extending along the width direction of the slide fastener, a first intermediate surface extending along the width direction of the slide fastener between the upper surface and the front side surface, and a second intermediate surface extending along the width direction of the slide fastener between the upper surface and the rear side surface, and a first boundary line is defined between the upper surface and the first intermediate surface, and a second boundary line is defined between the upper surface and the second intermediate surface.
  • the upper surface, the front side surface, and the rear side surface of the element upper part of each fastener element are shaped so as not to straddle the center line of the slide fastener.
  • the closed state of the slide fastener in each of the front and rear fastener elements provided on different fastener stringers of a pair of left and right fastener stringers and adjacently engaged on the center line of the slide fastener, when a first virtual line is set that is tangent to a first boundary line at least on the core string provided on the side edge of the fastener tape and extends parallel to the width direction of the slide fastener, and a second virtual line is set that is tangent to a second boundary line at least on the core string provided on the side edge of the fastener tape and extends parallel to the width direction of the slide fastener, the upper part of the fastener element is shaped so that the first virtual line of the rear fastener element and the second virtual line of the front fastener element
  • a slide fastener comprises a pair of left and right fastener stringers, each of which includes a fastener tape and a plurality of fastener elements attached to a side edge of the fastener tape at a predetermined pitch, each of which includes a lower element portion and an upper element portion respectively provided below and above the plane in which the fastener tape exists, the lower element portion having at least one engaging portion and at least one engaged portion, and a slider which moves forward on the center line of the slide fastener to alternately engage the individual fastener elements included in one of the pair of left and right fastener stringers with the individual fastener elements included in the other of the pair of left and right fastener stringers, and which moves backward on the center line of the slide fastener to disengage them.
  • each fastener element includes an upper surface extending along the width direction of the slide fastener perpendicular to the center line of the slide fastener, a front side surface extending along the width direction of the slide fastener, a rear side surface extending along the width direction of the slide fastener, a first intermediate surface extending along the width direction of the slide fastener between the upper surface and the front side surface, and a second intermediate surface extending along the width direction of the slide fastener between the upper surface and the rear side surface, and a first boundary line is defined between the upper surface and the first intermediate surface, and a second boundary line is defined between the upper surface and the second intermediate surface.
  • the element upper part of the fastener element has an upper base end surface located on the tape surface of the fastener tape, and an upper tip surface located outside the tape surface of the fastener tape.
  • the upper tip surface of each fastener element included in one of the pair of left and right fastener stringers and the upper tip surface of each fastener element included in the other of the pair of left and right fastener stringers are alternately arranged on both sides of the center line of the slide fastener.
  • any of the above-mentioned aspects may further include one or more of the following features or any combination thereof. Needless to say, it is also possible to grasp a new embodiment by replacing some features of any of the above-mentioned aspects with any of the following features. [1] In the closed state of the slide fastener, the second imaginary line of the front fastener element extends coincident with or adjacent to a third boundary line between the front side surface of the rear fastener element and the first intermediate surface.
  • the width of the upper surface of the element upper part of the fastener element determined between the first virtual line and the second virtual line falls within a range determined by a lower limit value obtained by multiplying 1/2 of the width of the element upper part determined from the lower edge of the front side surface that is in contact with the fastener tape and extends along the width direction of the slide fastener and the lower edge of the rear side surface that is in contact with the fastener tape and extends along the width direction of the slide fastener, by 0.8 and an upper limit value obtained by multiplying 1/2 of that value by 1.2.
  • a third boundary line is defined between the front side surface and the first intermediate surface, and a fourth boundary line is defined between the rear side surface and the second intermediate surface, and the first to fourth boundary lines are oriented approximately parallel to each other at least across the entire width of the core cord provided at the side edge portion of the fastener tape.
  • the gap is less than 1/3 of the distance between the first imaginary line and the second imaginary line in one of the front and rear fastener elements, and/or the gap is more than 1/5 of the distance between the first imaginary line and the second imaginary line.
  • each fastener element further includes a first intermediate surface extending along the width direction of the slide fastener between the upper surface and the front side surface, and a second intermediate surface extending along the width direction of the slide fastener between the upper surface and the rear side surface, the first intermediate surface being a curved surface extending downward while curving from a first boundary line between the upper surface and the first intermediate surface to a third boundary line between the first intermediate surface and the front side surface, and the second intermediate surface being a curved surface extending downward while curving from a second boundary line between the upper surface and the second intermediate surface to a fourth boundary line between the second intermediate surface and the rear side surface.
  • each fastener element may be wider away from the top surface due to the slope of the front and rear sides, for example resulting in a tapered shape.
  • the front and rear sides each form an angle within the range of 75° to 85° with respect to the upper tape surface of the fastener tape.
  • each fastener element has an upper base end surface located on the tape surface of the fastener tape and an upper tip surface located outside the tape surface of the fastener tape, and when the slide fastener is in a closed state, the upper tip surfaces of each fastener element included in one of the pair of left and right fastener stringers and the upper tip surfaces of each fastener element included in the other of the pair of left and right fastener stringers are alternately arranged on both sides of the center line of the slide fastener.
  • each fastener element has an upper base end surface located on the tape surface of the fastener tape and an upper tip surface located outside the tape surface of the fastener tape, and when the upper tip surface of the front fastener element of the front and rear fastener elements and the upper tip surface of the rear fastener element of the front and rear fastener elements are moved parallel to a common plane along the center line of the slide fastener in a closed state, the upper tip surface of the front fastener element and the upper tip surface of the rear fastener element form at least a part of the equal sides of an isosceles triangle with an acute apex angle.
  • Each fastener element has an element center line parallel to the width direction of the slide fastener, and the element upper and element lower portions of each fastener element are provided on the element center line and are shaped symmetrically with respect to the element center line.
  • the upper surface of the upper portion of each fastener element has an elongated rectangular contour along an element center line parallel to the width direction of the slide fastener.
  • the upper part of the element is a generally rectangular parallelepiped portion that is elongated between the upper base end face and the upper tip face along the element center line that is parallel to the width direction of the slide fastener, and the lower part of the element is elongated between the lower base end face and the lower tip face along the element center line.
  • the upper part of the element further includes a first intermediate surface extending along the width direction of the slide fastener between the upper surface and the front side surface, and a second intermediate surface extending along the width direction of the slide fastener between the upper surface and the rear side surface, and in each fastener stringer of the pair of left and right fastener stringers, the upper tip surface of the upper part of the fastener element is offset closer to the side edge of the fastener tape than the lower tip surface, and an intermediate surface is formed between the lower tip surface and the upper tip surface.
  • the angle between the upper tip surface and the intermediate surface is equal to an angle in the range between 90° and 100°.
  • the lower element portion includes a base portion having a lower proximal surface, a head portion having a lower distal surface, and a neck portion narrowed to provide a minimum element width between the base portion and the head portion.
  • the upper tip surface is positioned outward of the fastener tape along the element center line from the position of the minimum element width at the neck portion; and/or in each fastener element of each fastener stringer of a pair of left and right fastener stringers, the upper tip surface is positioned closer to the position of the minimum element width at the neck portion than the lower tip surface or its most distal end position in the direction along the element center line.
  • each fastener element has an upper base end surface located on the tape surface of the fastener tape and an upper tip surface located opposite the upper base end surface, and the upper surface of the upper portion of the element is composed of a total of three regions: a main region, a first inclined region that gradually inclines at a first predetermined angle between the main region and the upper end of the upper base end surface, and a second inclined region that gradually inclines at a second predetermined angle between the main region and the upper end of the upper tip surface.
  • FIG. 1 is a schematic top view of a slide fastener according to one embodiment of the present disclosure.
  • FIG. 2 is a schematic partial perspective view of a slide fastener, with the slider not shown.
  • FIG. 2 is a schematic top view of a slide fastener, showing a schematic state in which left and right fastener elements are engaged with each other.
  • FIG. 2 is a left side view of the slide fastener when the slide fastener is in a closed state, with the positions of a first imaginary line DL1 and a second imaginary line DL2 indicated by arrows.
  • 4 is a schematic partial cross-sectional view of the slide fastener taken along the dashed line IV-IV in FIG. 3.
  • FIG. 3 is a schematic partial cross-sectional view of the slide fastener taken along the dashed line IV-IV in FIG. 3.
  • FIG. 2 is a schematic perspective view of a fastener element attached to a side edge of a fastener tape.
  • 1 is a schematic top view of two adjacent fastener elements attached to a side edge of a fastener tape.
  • FIG. 2 is a schematic bottom view of two adjacent fastener elements attached to a side edge of a fastener tape.
  • FIG. 1 is a schematic side view of two adjacent fastener elements attached to the side edges of a fastener tape, showing the upper tip surface of the upper element and the lower tip surface of the lower element above and below the mid-plane.
  • the terms used to indicate the slide fastener reference directions are the front-rear direction, the left-right direction, and the up-down direction, which are mutually orthogonal.
  • the terms used to indicate the fastener tape reference directions are the tape width direction, the tape length direction, and the tape thickness direction, which are mutually orthogonal.
  • the terms used to indicate the fastener element reference directions are the element centerline, the element width direction, and the element thickness direction, which are mutually orthogonal.
  • the front-rear direction, the tape length direction, and the element width direction mean the same direction or are parallel to each other.
  • the left-right direction, the tape width direction, and the element centerline mean the same direction or are parallel to each other.
  • the up-down direction, the tape thickness direction, and the element thickness direction mean the same direction or are parallel to each other.
  • the front-to-rear direction corresponds to the direction of movement of the slider 9 for opening and closing the slide fastener 1, and coincides with the longitudinal direction of the slide fastener 1.
  • the left-to-right direction is a direction perpendicular to the front-to-rear direction, and corresponds to the width direction of the slide fastener 1.
  • the up-to-down direction is a direction perpendicular to the front-to-rear and left-to-right directions. Of course, the up-to-down direction does not have to correspond to the vertical direction (direction of gravity). In other words, the terms indicating directions referred to in this specification are unrelated to the vertical direction (direction of gravity).
  • Figure 1 is a schematic top view of the slide fastener 1.
  • Figure 2 is a schematic partial perspective view of the slide fastener 1, with the slider 9 omitted.
  • Figure 3 is a schematic top view of the slide fastener 1, and shows the engagement state of the left and right fastener elements 4, 4'.
  • Figure 4 is a left side view of the slide fastener 1 when the slide fastener 1 is in a closed state.
  • each fastener element 4 included in one of the pair of left and right fastener stringers 2, 2' and the upper end surface 65' of each fastener element 4' included in the other of the pair of left and right fastener stringers 2, 2' are alternately arranged on both sides of the center line CL of the slide fastener 1.
  • Figure 5 is a schematic partial cross-sectional view of the slide fastener 1 along the dashed line IV-IV in Figure 3.
  • Figure 6 is a schematic perspective view of the fastener element 4 attached to the side edge portion 31 of the fastener tape 3, 3'.
  • FIG. 7 is a schematic top view of two adjacent fastener elements attached to the side edge 31 of the fastener tape 3, 3'.
  • FIG. 8 is a schematic bottom view of two adjacent fastener elements 4 attached to the side edge 31 of the fastener tape 3, 3'.
  • FIG. 9 is a schematic side view of two adjacent fastener elements 4 attached to the side edge 31 of the fastener tape 3, 3', showing the upper tip surface 65 of the element upper part 6 and the lower tip surface 55 of the element lower part 5 above and below the intermediate surface 7, 7' described below.
  • FIG. 10 is a schematic side view of two adjacent fastener elements 4 attached to the side edge 31 of the fastener tape 3, 3' (however, the right element is a cross-sectional view), showing the upper base end surface 64 of the element upper part 6 and the lower base end surfaces 54, 54' of the element lower part 5 above and below the fastener tape 3, 3'.
  • the slide fastener 1 is typically a flexible, elongated member that extends in the front-rear direction with a substantially constant left-right width.
  • the slide fastener 1 has a pair of left and right fastener stringers 2, 2' and a slider 9.
  • the slider 9 advances on the center line CL of the slide fastener 1 to alternately engage the individual fastener elements 4 included in one of the pair of left and right fastener stringers 2, 2' with the individual fastener elements 4' included in the other of the pair of left and right fastener stringers 2, 2', and moves backward on the center line CL of the slide fastener 1 to disengage them.
  • a slider of a general structure can be used as the slider 9.
  • the slider 9 has upper wing plates on the element upper part 6, 6' side of the fastener elements 4, 4' described below, lower wing plates on the element lower part 5, 5' side, and connecting columns that connect the upper wing plates and the lower wing plates.
  • the connecting columns disengage the engaged left and right fastener elements 4, 4'.
  • the connecting posts of the slider 9 are provided to guide the movement of the lower element parts 5, 5' during both the engagement and disengagement processes of the fastener elements 4, 4'. During both the engagement and disengagement processes of the fastener elements 4, 4', it is optional whether the upper element parts 6, 6' contact the connecting posts of the slider 9 or not, and there may be a gap between them.
  • the left and right fastener stringers 2, 2' are identical in configuration (or are mirror images except for the fact that the arrangement of the fastener elements 4, 4' is offset in the front-to-rear direction by half a pitch (Pi/2) for the engagement between the fastener elements 4, 4'). Therefore, the explanation given for the left fastener stringer 2 also applies to the right fastener stringer 2'. Elements of the right fastener stringer 2' that correspond to elements of the left fastener stringer 2 are referred to by the same Arabic numerals as those assigned to the elements of the left fastener stringer 2, followed by a colon.
  • the fastener stringer 2, 2' includes a fastener tape 3, 3' and a plurality of fastener elements 4, 4' attached to the side edge portion 31, 31' of the fastener tape 3, 3' (typically, a core string 33, 33' provided thereon) at a predetermined pitch Pi.
  • the fastener tape 3, 3' has a tape length LN3 larger than the tape width W3.
  • the fastener elements 4, 4' are individually attached to the side edge portion 31, 31' of the fastener tape 3, 3' at a predetermined pitch Pi along the tape length direction of the fastener tape 3, 3'.
  • the fastener tape 3, 3' is a woven fabric, a knitted fabric, or a mixture of these, and has high flexibility.
  • the fastener elements 4, 4' are resin elements attached to the side edge portion 31, 31' of the fastener tape 3, 3' by injection molding.
  • Examples of materials for the fastener elements 4, 4' include nylon, polyacetal, polyamide, polypropylene, polybutylene terephthalate, polycarbonate, etc., but other materials can also be used.
  • the fastener tape 3, 3' has an upper tape surface 36, 36' and a lower tape surface 37, 37' as tape surfaces, and has a substantially constant tape thickness defined by these.
  • the upper tape surface 36, 36' and the lower tape surface 37, 37' of the fastener tape 3, 3' are non-flat surfaces having irregularities according to the tape weaving or knitting structure, but can be considered as two-dimensional planes.
  • the fastener tape 3, 3' can be divided into side edge portions 31, 31' to which the fastener elements 4, 4' are attached, and the remaining tape main body portion 32, 32'.
  • a core string 33, 33' can be provided on the side edge portions 31, 31'.
  • the core string 33, 33' extends in a long length along the side edge portions 31, 31'.
  • the core cord 33, 33' includes an upper core cord portion that protrudes upward from the upper tape surface 36, 36' of the fastener tape 3, 3', and a lower core cord portion that protrudes downward from the lower tape surface 37, 37' of the fastener tape 3, 3'. It is also possible to omit one of the upper core cord portion and the lower core cord portion.
  • the fastener element 4, 4' includes a lower element portion 5, 5' and an upper element portion 6, 6'.
  • the lower element portion 5, 5' and the upper element portion 6, 6' are respectively provided below and above the plane on which the fastener tape 3, 3' exists.
  • the upper element portion 6, 6' may be a substantially rectangular parallelepiped portion.
  • the lower element portion 5, 5' may have at least one engaging portion 58 and at least one engaged portion 59.
  • the side edge portion 31, 31' and/or the core string 33, 33' of the fastener tape 3, 3' are sandwiched between the lower element portion 5, 5' and the upper element portion 6, 6' in the element thickness direction.
  • the lower element portion 5, 5' includes a portion that contacts and adheres to the tape lower surface 37, 37' of the fastener tape 3, 3'.
  • the upper element portion 6, 6' includes a portion that contacts and adheres to the tape upper surface 36, 36' of the fastener tape 3, 3'. Outside the tape surface of the fastener tapes 3, 3', the lower element parts 5, 5' and the upper element parts 6, 6' are directly bonded and laminated.
  • the fastener elements 4, 4' have an element center line CX that is parallel to the tape width of the fastener tapes 3, 3'.
  • the element center line CX is parallel to the width direction of the slide fastener 1 and is positioned at the center of the fastener elements 4, 4' in the width direction.
  • the element upper parts 6, 6' are shorter than the element lower parts 5, 5'.
  • the length L6 of the element upper parts 6, 6' is greater than 2/3 of the length L5 of the element lower parts 5, 5' and less than 4/5 of the length L5 of the element lower parts 5, 5'.
  • the upper element portion 6, 6' may be a substantially rectangular parallelepiped portion elongated (the element width is smaller than the element length) between the upper base end surface 64, 64' and the upper tip surface 65, 65' along the element center line CX.
  • the lower element portion 5, 5' may be elongated between the lower base end surface 54, 54' and the lower tip surface 55, 55' along the element center line CX. This allows the fastener element 4, 4' to be elongated as a whole, and to have an appearance similar to that of a metal element.
  • the upper base end surface 64, 64' is located on the tape upper surface 36, 36' of the fastener tape 3, 3'.
  • the upper tip surface 65, 65' is located outside the tape surface of the fastener tape 3, 3'.
  • the lower base end surface 54, 54' is located on the tape lower surface 37, 37' of the fastener tape 3, 3'.
  • the lower tip surface 55, 55' is located outside the tape surface of the fastener tape 3, 3'.
  • Each element upper portion 6, 6' includes a single elongated portion including an upper surface 61, 61' extending along the width direction of the slide fastener 1 (e.g., the element center line CX) perpendicular to the center line CL of the slide fastener 1, a front side surface 62, 62' extending along the width direction of the slide fastener 1 (e.g., the element center line CX), and a rear side surface 63, 63' extending along the width direction of the slide fastener 1 (e.g., the element center line CX) (in an exemplary embodiment, it is made up of the single elongated portion).
  • each element upper portion 6, 6' is provided on the element center line CX and extends along the element center line CX, and this point is also the same for the single elongated portion.
  • each element upper portion 6, 6' further includes a first intermediate surface 66, 66' extending along the width direction of the slide fastener 1 (e.g., element center line CX) between the upper surface 61, 61' and the front side surface 62, 62', and a second intermediate surface 67, 67' extending along the width direction of the slide fastener 1 (e.g., element center line CX) between the upper surface 61, 61' and the rear side surface 63, 63'.
  • first intermediate surface 66, 66' extending along the width direction of the slide fastener 1 (e.g., element center line CX) between the upper surface 61, 61' and the front side surface 62, 62'
  • a second intermediate surface 67, 67' extending along the width direction of the slide fastener 1
  • the fastener elements 4, 4' can be made to appear thinner when viewed from above (e.g., see Figures 1 and 3).
  • the single elongated portion may be the above-mentioned substantially rectangular parallelepiped portion.
  • a first boundary line L1 is defined between the upper surface 61, 61' and the first intermediate surface 66, 66'
  • a second boundary line L2 is defined between the upper surface 61, 61' and the second intermediate surface 67, 67'
  • a third boundary line L3 is defined between the front side surface 62, 62' and the first intermediate surface 66, 66'
  • a fourth boundary line L4 is defined between the rear side surface 63, 63' and the second intermediate surface 67, 67' (see FIG. 3).
  • the first intermediate surface 66, 66' may be a curved surface that extends downward while curving (e.g., with a constant or changing curvature and/or in an arc) from the first boundary line L1 between the upper surface 61, 61' and the first intermediate surface 66, 66' to the third boundary line L3 between the first intermediate surface 66, 66' and the front side surface 62, 62', but is not limited thereto and may be a flat inclined surface.
  • the second intermediate surface 67, 67' is a curved surface that extends downward while curving (e.g., with a constant or varying curvature and/or in an arc) from the second boundary line L2 between the upper surface 61, 61' and the second intermediate surface 67, 67' to the fourth boundary line L4 between the second intermediate surface 67, 67' and the rear side surface 63, 63', but is not limited to this and may be a flat inclined surface.
  • the first and second intermediate surfaces 66, 66', 67, 67' are curved surfaces with a constant curvature and can be easily distinguished from the upper surface 61, 61', which is observed to be substantially flat.
  • the upper surface 61, 61' is not a completely flat surface, and may curve slightly as it moves away from the element center line CX, but the curvature is extremely small compared to the curvature of the first intermediate surface 66 (for example, 1/10 or less). In this way, a first boundary line L1 can be defined between the first intermediate surface 66 and the upper surface 61, 61'.
  • the front side surface 62 and the rear side surface 63 are inclined surfaces with a constant inclination, i.e., non-curved surfaces, as shown in FIG. 4. Therefore, the boundary between the first intermediate surface 66 and the front side surface 62 can be set at the curvature start point of the first intermediate surface 66. Similarly, the boundary between the second intermediate surface 67 and the rear side surface 63 can be set at the curvature start point of the second intermediate surface 67.
  • the first to fourth boundary lines L1, L2, L3, and L4 are oriented approximately parallel to each other at least across the entire width of the core cord 33 provided on the side edge portions 31, 31' of the fastener tapes 3, 3' (or across the main region 61a of the upper surface 61 of the element upper portion 6 described below). This may be a consequence of the upper surfaces 61, 61', the front side surfaces 62, 62', the rear side surfaces 63, 63', and the first and second intermediate surfaces 66, 66', 67, 67' extending parallel to each other in the same direction.
  • the distance between the first boundary line L1 and the second boundary line L2 may increase slightly as it approaches the upper base end surface 64.
  • the distance between the third boundary line L3 and the fourth boundary line L4 may increase slightly as it approaches the upper base end surface 64, 64'.
  • the distance between the first boundary line L1 and the second boundary line L2 may increase slightly as it approaches the upper tip surface 65, 65'.
  • the second boundary line L2 and/or the fourth boundary line L4 may each include a slanted line that slopes rearward as it approaches the upper base end surface 64, 64' or the upper tip surface 65, 65'.
  • the element upper part 6 has an elongated rectangular outline along the element center line CX (when viewed from above).
  • the upper surface 61 of the element upper part 6 also has an elongated rectangular outline along the element center line CX (when viewed from above). Due to the elongated shape of the element upper part 6 and upper surface 61, the fastener element 4 appears to be a metal element, even though it is actually a plastic element.
  • the element upper parts 6, 6' of the fastener elements 4, 4' are shaped so as not to straddle (in other words, not to cross) the center line CL of the slide fastener 1.
  • the element upper parts 6, 6' of the fastener elements 4, 4' are shaped so that the upper surfaces 61, 61', the front side surfaces 62, 62', the rear side surfaces 63, 63', and the upper tip surfaces 65, 65' do not straddle (in other words, not to cross) the center line CL of the slide fastener 1.
  • the appearance of the fastener elements 4, 4' can be made to resemble a metal element using a motif of a metal element, although it has a different shape from the metal element, rather than being faithful to the shape of the metal element.
  • narrowing the fastener elements 4, 4' reduces the pitch Pi of the fastener elements 4, 4', and can also reduce the sliding resistance of the slider 9 for opening and closing the slide fastener 1. In other words, it is easier to open and close the slide fastener 1 by moving the slider 9 with less force.
  • the element upper parts 6, 6' are arranged in a zigzag pattern on both sides of the center line CL of the slide fastener 1.
  • the upper surface 61 of the element upper part 6 of the left fastener element 4 and the upper surface 61 of the element upper part 6' of the right fastener element 4' are arranged in a zigzag pattern on both sides of the center line CL of the slide fastener 1.
  • the element upper parts 6, 6' have portions that face each other in the width direction of the slide fastener 1, so that even if the slide fastener 1 is twisted, interference between the element upper parts 6, 6' prevents the fastener elements 4, 4' from becoming disengaged.
  • the first virtual line DL1 is located at a position where a line parallel to the width direction of the slide fastener 1 is in contact with the first boundary line L1 (inscribed with respect to the fastener elements 4, 4') when moved forward in parallel from the element center line CX.
  • the second virtual line DL2 is located at a position where a line parallel to the width direction of the slide fastener 1 is in contact with the second boundary line L2 (inscribed with respect to the fastener elements 4, 4') when moved backward in parallel from the element center line CX.
  • the third and fourth virtual lines can be set in the same manner for the third and fourth boundary lines L3, L4.
  • the second imaginary line DL2 of the front fastener element E1 extends coincident with or adjacent to the third boundary line L3, L3' between the front side surface 62, 62' and the first intermediate surface 66, 66' of the rear fastener element E2. This ensures an appropriate width for the upper surfaces 61, 61' of the left and right element upper parts 6, 6'.
  • the width W61 of the upper surface 61, 61' of the element upper portion 6, 6' of the fastener element 4, 4' determined between the first virtual line DL1 and the second virtual line DL2 falls within a range determined by a lower limit value obtained by multiplying 1/2 the width W6 of the element upper portion 6, 6' determined by the lower side of the front side surface 62, 62' that contacts the fastener tape 3, 3' and extends along the width direction of the slide fastener 1 and the lower side of the rear side surface 63, 63' that contacts the fastener tape 3, 3' and extends along the width direction of the slide fastener 1, by 0.8, and an upper limit value obtained by multiplying 1/2 the width W6 by 1.2.
  • the widths of the upper surfaces 61, 61' of the left and right element upper portions 6, 6' are made extremely small, the appearance of the fastener element 4, 4' will become far removed from and will no longer resemble a metal element.
  • the width W6 of the element upper portion 6 is 1.3 mm or more.
  • the length L6 of the upper part 6 of the element is 2.9 mm or more.
  • the width of the top surface 61 of the element upper portion 6 of the left fastener element 4 can be understood to be defined by the first imaginary line DL1 and the second imaginary line DL2, but can also be understood to be defined between the first boundary line L1 and the second boundary line L2. Note that due to the inclination of the front side surface 62 and the rear side surface 63 of each element upper portion 6, the width of the top surface 61 of the element upper portion 6 is smaller than the width of the element upper portion 6 in the same direction.
  • the above-mentioned gap SP may be 1/3 or less of the distance between the first virtual line DL1 and the second virtual line DL2 in one fastener element of the front and rear fastener elements E1, E2, and/or may be 1/5 or more of the distance between the first virtual line DL1 and the second virtual line DL2.
  • the upper surfaces 61, 61' can be made to an appropriate width.
  • the width W6 of the element upper portion 6 and the height H6 of the element upper portion 6 can satisfy 0.8 ⁇ (H6/W6) ⁇ 0.95.
  • the attachment strength of the fastener element 4 to the fastener tapes 3, 3' may be reduced by narrowing the width of the element upper portion 6, the reduction in attachment strength can be compensated for by increasing the height H6 relative to the width W6.
  • the height H6 is equal to the distance from the tape upper surface 36, 36' of the fastener tapes 3, 3' or a plane including this to the upper surface 61 of the element upper portion 6 (for example, the main region 61a described below).
  • the fastener element disclosed in Patent Document 1 is designed under the condition of (H6/W6) ⁇ 0.8 in order to suppress the degree of its protrusion.
  • the above-mentioned front side surface 62, 62' and rear side surface 63, 63' are preferably inclined surfaces rather than perpendicular to the tape upper surface 36, 36' of the fastener tape 3, 3'.
  • the front side surface 62, 62' is a downwardly inclined surface that approaches the tape upper surface 36, 36' of the fastener tape 3, 3' as it extends forward from the upper surface 61, 61'.
  • the rear side surface 63, 63' is a downwardly inclined surface that approaches the tape upper surface 36, 36' of the fastener tape 3, 3' as it extends rearward from the upper surface 61, 61'.
  • the front side surface 62, 62' and rear side surface 63, 63' each form an angle within the range of 75° to 85° with respect to the tape upper surface 36, 36' of the fastener tape 3, 3'.
  • the upper portion 6, 6' of each fastener element 4, 4' becomes wider as it moves away from the upper surface 61, 61'.
  • each upper portion 6, 6' of the element has a tapered shape.
  • the rear side 63 of the front fastener element 4 and the front side 62' of the rear fastener element 4 form at least a part of the equilateral sides of an isosceles triangle RC with an acute apex angle.
  • the oblique line including the rear side 63 of the front fastener element 4 and the oblique line including the front side 62' of the rear fastener element 4' moved parallel to a common plane form the equilateral sides of an isosceles triangle RC with an acute apex angle.
  • the symmetry of the left and right fastener elements 4, 4' (with respect to the center line CL of the slide fastener 1) is enhanced.
  • the oblique line including the upper end surface 65 of the front fastener element 4 moved parallel to a common plane and the oblique line including the upper end surface 65' of the rear fastener element 4' form the equilateral sides of an isosceles triangle RC1 with an acute apex angle.
  • the symmetry of the left and right fastener elements 4, 4' (with respect to the center line CL of the slide fastener 1) is enhanced.
  • the isosceles triangle RC shown in FIG. 4 and the isosceles triangle RC1 shown in FIG. 5 have an apex angle that faces upwards, while the apex angle of the isosceles triangle RC faces downwards.
  • the apex angle of the isosceles triangle RC is preferably in the range of 10° to 40°, and more preferably in the range of 15° to 30°.
  • the apex angle of the isosceles triangle RC1 is preferably in the range of 5° to 20°, and more preferably in the range of 7° to 13°.
  • the element upper part 6, 6' is a block-shaped part provided above the fastener tapes 3, 3', and has an upper surface 61, 61', a front side surface 62, 62', a rear side surface 63, 63', an upper base end surface 64, 64', and an upper tip surface 65, 65'.
  • the element upper part 6, 6' is typically configured not to engage with the element upper part 6, 6' of the fastener element 4, 4' that is the engaging partner of the fastener element 4, 4' including this element upper part 6, 6' (i.e., it does not include an engaging structure (e.g., a pair of one or more engaging parts and one or more engaged parts)).
  • the engaging function of the fastener element 4, 4' can be ensured solely by the element lower part 5, 5'.
  • the front side 62, 62', rear side 63, 63', upper base end surface 64, 64', and upper tip surface 65, 65' are each one of the side surfaces of the element upper portion 6, 6'.
  • the front side 62, 62' and rear side 63, 63' extend parallel to the side edge portion 31, 31' of the fastener tape 3, 3' so as to be perpendicular or nearly perpendicular to the side edge portion 31, 31' of the fastener tape 3, 3'. More specifically, the front side 62, 62' and rear side 63, 63' extend between the upper base end surface 64, 64' and the upper tip surface 65, 65' along the element center line CX.
  • the upper base end surface 64, 64' is on the tape surface of the fastener tape 3, 3', and more specifically, stands upward from the tape upper surface 36, 36' of the fastener tape 3, 3'.
  • the upper tip surface 65, 65' is outside the tape surface of the fastener tape 3, 3', and specifically, it stands upward from the intermediate surface 7, 7' described below.
  • the upper tip surface 65, 65' is located outside the tape surface of the fastener tape 3, 3' when viewed from the upper base end surface 64, 64', and specifically, it is located away from the upper base end surface 64, 64' beyond the side edge portion 31 of the fastener tape 3, 3' and outside the tape surface of the fastener tape 3, 3'.
  • the corners of the joining points of each side surface are chamfered and rounded.
  • the tape outside means, for a certain fastener stringer, the direction from a position on the tape surface of the fastener tape to a position outside the tape surface, and typically perpendicular to the side edge portion (or core string) of the fastener tape.
  • the upper surface 61, 61' may have an elongated rectangular contour along the element center line CX as described above. Additionally or alternatively, when the width of the upper surface 61, 61' is W61 and the length of the upper surface 61, 61' is L61 (see FIG. 7), 1.7 ⁇ L61/W61 ⁇ 2.3 may be satisfied.
  • the first intermediate surface 66, 66' and the second intermediate surface 67, 67' (if these are omitted, the front side surface 62, 62' and the rear side surface 63, 63') are individually connected to the two long sides included in the rectangular contour of the upper surface 61, 61'.
  • the upper base end surface 64, 64' and the upper tip surface 65, 65' are individually connected to the two short sides included in the rectangular contour of the upper surface 61, 61'.
  • the corners of the connection points between the upper surface 61, 61' and each of the above-mentioned surfaces are chamfered and rounded. Due to the inclination of the front side surface 62, the rear side surfaces 63, 63', the upper base end surface 64, and the upper tip surface 65, the upper surface 61 can be an area that is smaller than the top view shape (contour) of the upper element surface 6.
  • the front side surfaces 62, 62' and the rear side surfaces 63, 63' are inclined away from the element center line CX as they extend downward from the top surfaces 61, 61' (or the first intermediate surfaces 66, 66'), and the rear side surfaces 63, 63' are inclined away from the element center line CX as they extend downward from the top surfaces 61, 61' (or the second intermediate surfaces 67, 67') (see Figures 9 and 10).
  • the element upper portions 6, 6' are shaped like a trapezoid when viewed in a direction along the element center line CX.
  • the top surfaces 61, 61' coincide with the upper base of the trapezoid.
  • the upper base end surface 64, 64' may be inclined away from the upper tip surface 65, 65' as it extends downward from the upper surface 61, 61', and the upper tip surface 65, 65' may be inclined away from the upper base end surface 64, 64' as it extends downward from the upper surface 61, 61' (see FIG. 5).
  • the angle ⁇ 64 (see FIG. 5) between the plane and the upper base end surface 64 is preferably larger than the angle ⁇ 62 (see FIG. 10) between the plane and the front side surface 62 and larger than the angle ⁇ 63 (see FIG. 10) between the plane and the rear side surface 63, 63'.
  • the upper surface 61, 61' of the element upper portion 6, 6' may be composed of a two-dimensional single surface or two-dimensionally continuous multiple surfaces.
  • the upper surface 61, 61' may be composed of a total of three regions, a main region 61a, a first inclined region 61b, and a second inclined region 61c, as shown in Fig. 4 (see Fig. 5).
  • the first inclined region 61b is gently inclined at a first predetermined angle ⁇ 61b between the main region 61a and the upper end of the upper base end surface 64.
  • the second inclined region 61c is gently inclined at a second predetermined angle ⁇ 61c between the main region 61a and the upper end of the upper tip surface 65.
  • the main region 61a may be a flat surface oriented parallel to the tape upper surface 36, 36' of the fastener tape 3, 3' or a plane including the tape upper surface 36, 36'.
  • the first predetermined angle ⁇ 61b may be an angle between the plane on which the main region 61a exists and the first inclined region 61b.
  • the second predetermined angle ⁇ 61c may be an angle between the plane on which the main region 61a exists and the second inclined region 61c.
  • the second predetermined angle ⁇ 61c is smaller than the first predetermined angle ⁇ 61b . This makes it easier to provide the upper end surface 65 with a sufficient height, and for example, when the slide fastener 1 is twisted, the element upper portions 6, 6' interfere with each other, suppressing the disengagement of the fastener elements 4, 4'.
  • the upper base end surface 64 extends steeply upward between positions P1 and P2.
  • the upper surface 61 extends between positions P2 and P5.
  • the first inclined region 61b slopes gently upward from position P2 to position P3.
  • the main region 61a extends horizontally between positions P3 and P4.
  • the second inclined region 61c slopes gently downward from position P4 to position P5.
  • the upper tip surface 65 extends steeply downward between positions P5 and P6.
  • the distance between positions P1 and P2 and the distance between positions P5 and P6 are both sufficiently smaller than the distance between positions P2 and P5.
  • the element lower portion 5, 5' is shaped to be elongated between the lower base end surface 54, 54' and the lower tip surface 55, 55' along the element center line CX, and to have at least one engaging portion 58 and at least one engaged portion 59 between the lower base end surface 54, 54' and the lower tip surface 55, 55'.
  • the element lower portion 5 is typically configured to engage with each of the element lower portions 5', 5' of the two fastener elements 4', 4' that are engaged with the fastener element 4 including this element lower portion 5.
  • the engaging portion 58 and the engaged portion 59 are appropriately shaped.
  • the engaging portion 58 typically protrudes along the center line CL of the slide fastener 1 or an axis parallel thereto.
  • the engaged portion 59 is typically recessed along the center line CL of the slide fastener 1 or an axis parallel thereto.
  • the lower base end surface 54, 54' rises downward from the tape underside surface 37 of the fastener tape 3, 3'.
  • the lower tip surface 55, 55' is located beyond the side edge portion 31 of the fastener tape 3, 3' and away from the lower base end surface 54, 54' toward the outside of the fastener tape 3, 3' (i.e., outside the tape surface of the fastener tape 3, 3').
  • the lower tip surface 55, 55' may be the curved surface that protrudes most on the element center axis CX of the fastener element 4.
  • the lower tip surface 55, 55' slopes steeply downward from position P8 toward position P7 as shown in FIG. 5.
  • the lower tip surface 55, 55' may include a gently curved surface in the vicinity of position P7.
  • the upper end surface 65 is offset closer to the side edge 31 (or core string 33) of the fastener tape 3, 3' than the lower end surface 55, 55', and an intermediate surface 7, 7' is formed between the lower end surface 55, 55' and the upper end surface 65.
  • the narrow width of the element upper portion 6, 6' ensures that the appearance of the fastener element 4 resembles a metallic element. In this way, it is possible to provide a narrow fastener element 4 similar to a metallic element, with a metallic element motif.
  • the intermediate surfaces 7, 7' may be flat surfaces perpendicular to the element thickness direction, and may be, but are not limited to, flush with the fastener tapes 3, 3'.
  • the intermediate surfaces 7, 7' are flush with the tape upper surfaces 36, 36' of the fastener tapes 3, 3', or are in a plane closer to the tape upper surfaces 36, 36' than the tape lower surfaces 37 of the fastener tapes 3, 3'.
  • the thickness of the element lower parts 5, 5' below the intermediate surfaces 7, 7' can be sufficiently secured, and the engagement strength between the fastener elements 4, 4' can be increased.
  • the angle ⁇ 1 between the upper tip surface 65 and the intermediate surfaces 7, 7' is equal to an angle in the range between 90° and 100° (see FIG. 5).
  • the angle ⁇ 55 between the lower tip surface 55, 55' and the intermediate surfaces 7, 7' is equal to an angle in the range between 80° and 90° (see FIG. 5).
  • the intermediate surfaces 7, 7' can also be inclined or non-flat.
  • the top view shape of the intermediate surfaces 7, 7' may depend on the engagement structure of the lower element portions 5, 5'.
  • the width of the intermediate surfaces 7, 7' increases and then decreases as they move away from the upper end surface 65 along the element centerline CX; and/or the intermediate surfaces 7, 7' have a circular contour with an arc cut off by the upper end surface 65.
  • the intermediate surface 7 of the fastener element 4 may include two mounting areas 71 on which the upper element portions 6', 6' (e.g., shoulder portions 8 described below) of the two mating fastener elements 4', 4' are individually mounted, and an intermediate area 72 between these two mounting areas 71.
  • the area of the intermediate area 72 may be within a range of 0.5 to 1.5 times the total area of the two mounting areas 71. The same applies to the fastener element 4'.
  • their intermediate areas 72, 72' are visible (when viewed from above). At this time, the intermediate areas 72, 72' are located at the back between the element upper portions 6, 6' (and between their upper surfaces 61, 61') and are not noticeable.
  • the element lower part 5 includes a base part 51 having a lower base end surface 54, a head part 53 having a lower tip end surface 55, and a neck part 52 that is narrowed so as to have a minimum element width between the base part 51 and the head part 53.
  • the head part 53 includes at least one engaging part 58, which are two engaging parts 58 that protrude on opposite sides in the tape length direction (see FIG. 6).
  • the neck part 52 includes at least one engaged part 59, which are two engaged parts 59 that are recessed so as to form a narrowing of the neck part 52. The same is true for the element lower part 5'.
  • the base 51 is formed to have approximately the same width as the upper element parts 6, 6'. That is, the width W51 of the base 51 is equal to the width W6 of the upper element parts 6, 6'. Therefore, the pitch Pi of the fastener element 4 can be determined based on the structure of the lower element parts 5, 5'.
  • the length of the base 51 along the element center line CX is shorter than the length L6 of the upper element parts 6, 6'.
  • the lower base end faces 54, 54' are located on the opposite side of the upper base end faces 64, 64' of the upper element parts 6, 6' across the fastener tapes 3, 3'.
  • the base 51 has two side faces 512, 513 that are arranged perpendicular to the element width direction, and both extend along the element center line CX and straddle the core string 33 (see Figure 8).
  • the neck 52 has a width W52 that is the narrowest in the lower element portion 5, 5' (see FIG. 8).
  • the head 53 has a width W53 that is the widest in the lower element portion 5, 5' other than the base 51.
  • the lower element portion 5, 5' has a width that gradually decreases from the intermediate position between the base 51 and the neck 52 (i.e., the neck start position) to the width W52 as it extends outward from the tape, and after passing the width W52, has a width that gradually increases to the width W53.
  • the neck 52 is shaped to have a constriction
  • each engaged portion 59 is shaped to have a semi-cylindrical receiving space.
  • the width of the head 53 gradually decreases from the width W53 to the width W53.
  • the lower surfaces of the base 51, neck 52, and head 53 are formed in the same plane, forming one lower surface 56 of the lower element portion 5, 5'.
  • the side surfaces of the base 51, neck 52, and head 53 are continuous to form one contour.
  • the base 51 is fixed to the core cord 33, which has a width defined between positions P11 and P12, and to a portion of the fastener tape 3, 3' adjacent to the core cord 33.
  • the two engaging portions 58 may each be separated by the element center line CX of the fastener element 4 and/or may be mirror-symmetrical about the element center line CX (i.e., each is a semi-cylindrical portion).
  • the two engaged portions 59 may each be separated by the element center line CX of the fastener element 4 and/or may be mirror-symmetrical about the element center line CX (i.e., each is a portion having a semi-cylindrical receiving space).
  • the two engaged portions 59 are at least partially closed from above by the two shoulders 8 of the upper element portions 6, 6' (see FIG. 6).
  • the shoulders 8 are arranged on both sides of the neck portion 52 when the fastener element 4 is viewed from below (see FIG. 8).
  • the left and right fastener elements 4, 4' are engaged, the head portion 53 of the fastener element 4 on one side is inserted and held between the neck portions 52' of the adjacent fastener element 4' on the other side.
  • the head portion 53 is arranged directly below the shoulder portions 8' of the fastener elements 4', and its upward displacement is restricted.
  • the shoulder portions of the fastener element 4 function as portions that restrict the displacement of the fastener element 4' that is engaged with it.
  • the shoulder portions 8 form part of the block-shaped upper element portions 6, 6' of the elements, and do not have a shape that can be distinguished as a shoulder portion (when the upper element portions 6, 6' of the elements are viewed from above).
  • the upper end surface 65 is positioned outside the fastener tape 3, 3' in the direction along the element center line CX relative to the position of the minimum element width W52 in the neck portion 52 (see Figures 5 to 8). This allows the element upper portion 6, 6' to be formed longer and/or allows the shoulder portion 8 to have a sufficient area. Additionally or alternatively, the upper end surface 65 is positioned closer to the position of the minimum element width W52 in the neck portion 52 compared to the lower end surface 55, 55' or its most distal end position in the direction along the element center line CX. That is, the length L8 shown in Figure 8 is smaller than the length L9. In this case, the length L7 of the intermediate surface 7, 7' can be sufficiently secured (see Figure 7). By increasing the length L7 of the intermediate surface 7, 7', the stability when the left and right fastener elements 4, 4' are engaged is improved.
  • the manufacturing method of the slide fastener 1 is omitted because it is obvious to those skilled in the art from the above description.
  • the cavity shape of the mold for injection molding the fastener element 4 is simplified thanks to the relatively simple shape of the upper element parts 6, 6'.
  • the inclination of the side surfaces (e.g., the front side surface 62 and the rear side surface 63) of the upper element parts 6, 6' serves as the draft angle of the fastener element 4 from the mold cavity.
  • the lower end surface 55, 55' may have a gate mark.
  • the cavity surface of the mold also has high smoothness so that the outer surface of the fastener element 4 has high smoothness.
  • Metal foil can be applied to the upper surfaces 61, 61' to increase the glossiness.
  • the first inclined region 61b and the second inclined region 61c can ensure light reflection over a wider range of angles. Please note that this also applies when no metal foil is provided.
  • Slide fastener 2 Fastener stringer 3: Fastener tape 4: Fastener element 5: Lower element 6: Upper element 7: Middle surface 8: Shoulder 9: Slider 51: Base 52: Neck 53: Head 54: Lower base end surface 55: Lower tip surface 58: Engagement portion 59: Engaged portion 61: Upper surface 61a: Main region 61b: First inclined region 61c: Second inclined region 62: Front side 63: Rear side 64: Upper base end surface 65: Upper tip surface 71: Placement region 72: Middle region

Landscapes

  • Slide Fasteners (AREA)

Abstract

La présente invention concerne un élément de fermeture (4, 4') comprenant une partie inférieure d'élément (5, 5') et une partie supérieure d'élément (6, 6') disposées respectivement au-dessous et au-dessus d'un plan dans lequel une bande de fermeture (3, 3') est présente. La partie supérieure d'élément (6, 6') comprend une partie de forme allongée unique qui comprend une surface supérieure (61, 61') s'étendant le long d'une direction de largeur de la fermeture à glissière (1) orthogonale à une ligne centrale (CL) de la fermeture à glissière (1), une surface latérale avant (62, 62') s'étendant dans la même direction, et une surface latérale arrière (63, 63') s'étendant dans la même direction. Dans un état fermé de la fermeture à glissière (1), la partie supérieure d'élément (6, 6') de l'élément de fermeture (4, 4') est formée de manière à ne pas chevaucher la ligne centrale (CL) de la fermeture à glissière (1).
PCT/JP2022/041244 2022-11-04 2022-11-04 Fermeture à glissière WO2024095482A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2022/041244 WO2024095482A1 (fr) 2022-11-04 2022-11-04 Fermeture à glissière
CN202321335939.4U CN220236213U (zh) 2022-11-04 2023-05-30 拉链
CN202310620911.3A CN117981952A (zh) 2022-11-04 2023-05-30 拉链

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016046915A1 (fr) * 2014-09-24 2016-03-31 Ykk株式会社 Élément de fermeture, demi-chaîne de fermeture, et fermeture à glissière
WO2018122914A1 (fr) * 2016-12-26 2018-07-05 Ykk株式会社 Fermeture à glissière
WO2019216256A1 (fr) * 2018-05-10 2019-11-14 Ykk株式会社 Demi-chaîne de fermeture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016046915A1 (fr) * 2014-09-24 2016-03-31 Ykk株式会社 Élément de fermeture, demi-chaîne de fermeture, et fermeture à glissière
WO2018122914A1 (fr) * 2016-12-26 2018-07-05 Ykk株式会社 Fermeture à glissière
WO2019216256A1 (fr) * 2018-05-10 2019-11-14 Ykk株式会社 Demi-chaîne de fermeture

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