CN220236213U - Zipper fastener - Google Patents

Zipper fastener Download PDF

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Publication number
CN220236213U
CN220236213U CN202321335939.4U CN202321335939U CN220236213U CN 220236213 U CN220236213 U CN 220236213U CN 202321335939 U CN202321335939 U CN 202321335939U CN 220236213 U CN220236213 U CN 220236213U
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CN
China
Prior art keywords
fastener
slide fastener
tape
slide
width direction
Prior art date
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Active
Application number
CN202321335939.4U
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Chinese (zh)
Inventor
川原田耕平
杉田久知
志鹰润
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YKK Corp
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YKK Corp
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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

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  • Slide Fasteners (AREA)

Abstract

The utility model provides a zipper. The fastener element (4, 4 ') includes a lower element portion (5, 5') and an upper element portion (6, 6 ') provided below and above a plane in which the fastener tape (3, 3') is located, respectively. The element upper part (6, 6') comprises a single elongated shaped portion comprising: an upper surface (61, 61 ') extending in the width direction of the slide fastener (1) orthogonal to the Center Line (CL) of the slide fastener (1), front side surfaces (62, 62 ') extending in the same direction, and rear side surfaces (63, 63 ') extending in the same direction. In the closed state of the slide fastener (1), the element upper portions (6, 6 ') of the fastener elements (4, 4') do not cross the Centerline (CL) of the slide fastener (1).

Description

Zipper fastener
Technical Field
The present utility model relates to a slide fastener.
Background
As a fastener element of a slide fastener, a metal element attached to a side edge portion of a fastener tape by caulking (that is, by plastic deformation of metal) and a resin element attached to a side edge portion of a fastener tape by injection molding are known. The metallic fastener element has a higher gloss than the resin fastener element, and such an appearance is preferable in many cases. Of course, even in the case of a metallic element, a matte appearance with no gloss is sometimes preferable.
In this regard, patent document 1 discloses a resin fastener element having an appearance similar to that of a metal fastener element. Since the fastener tape is fixed by caulking, the metal fastener element has sufficient attachment strength even when the width is narrow. However, this is not the case for the resin fastener element. Therefore, in patent document 1, a relatively thick portion and a portion having a narrow tip are provided to achieve both sufficient attachment strength and a narrow element width.
Patent document 2 discloses a similar resin fastener element. Patent document 2 discloses a structure in which a quadrangular surface and a surface with a narrow tip are provided. As the metal fastener elements, one fastener element of patent document 2 (referred to as a single-sided metal fastener element in patent document 2) and the other fastener element of patent document 2 (referred to as a double-sided metal fastener element in patent document 2) are known.
Patent document 3 discloses a technique in which 2 divided portions are provided in one fastener element to make the fastener element look narrower.
Prior art literature
Patent literature
Patent document 1: international publication No. 2010/082694
Patent document 2: international publication No. 2016/046915
Patent document 3: international publication No. 2019/216256
Disclosure of Invention
Under the constraint of ensuring the desired attachment strength to the fastener tape, narrowing the resin fastener element allows the appearance of the metal fastener element to be imitated, and the sliding resistance of the slider to be reduced in accordance with the narrowing. However, if the appearance of the fastener element is consistent with that of the metal fastener element, one or more problems occur. For example, in the case of patent document 1, if the resin fastener element is narrowed, the narrower distal end portion thereof is narrowed accordingly. One or more problems such as a decrease in mechanical strength of the tip end narrow portion, miniaturization of the injection molding die, and/or an increase in cost can be caused. In addition, in the method of patent document 3, although the fastener element can be seen to be narrow in width, narrowing of the fastener element itself cannot be achieved, and as a result, sliding resistance of the slider cannot be reduced.
Based on the study of the above non-limiting examples, the present inventors have proposed the following new problems: further promote the narrowing of the fastener element, further reduce the sliding resistance of the slider.
One aspect of the present disclosure relates to a slide fastener, including: a pair of right and left fastener stringers, each fastener stringer including: a fastener tape; and a plurality of fastener elements mounted on the side edge portion of the fastener tape at a predetermined interval, each fastener element including a lower element portion and an upper element portion provided below and above a plane in which the fastener tape is located, respectively, the lower element portion having at least one engaging portion and at least one engaged portion; and a slider that advances on the center line of the slide fastener so as to alternately engage each fastener element included in one of the pair of right and left fastener stringers with each fastener element included in the other of the pair of right and left fastener stringers, and retreats on the center line of the slide fastener so as to release the engagement. The element upper portion of each fastener element includes a single elongated shaped portion including: an upper surface extending in a width direction of the slide fastener orthogonal to a center line of the slide fastener; a front side surface extending in the width direction of the slide fastener; and a rear side surface extending in the width direction of the slide fastener. The zipper is formed by: in a closed state of a slide fastener in which each fastener element included in one of the pair of right and left fastener stringers engages with each fastener element included in the other of the pair of right and left fastener stringers, the element upper portion of each fastener element does not cross the center line of the slide fastener.
Another aspect of the present disclosure relates to a slide fastener, comprising: a pair of right and left fastener stringers, each fastener stringer including: a fastener tape; and a plurality of fastener elements mounted on the side edge portion of the fastener tape at a predetermined interval, each fastener element including a lower element portion and an upper element portion provided below and above a plane in which the fastener tape is located, respectively, the lower element portion having at least one engaging portion and at least one engaged portion; and a slider that advances on the center line of the slide fastener so as to alternately engage each fastener element included in one of the pair of right and left fastener stringers with each fastener element included in the other of the pair of right and left fastener stringers, and retreats on the center line of the slide fastener so as to release the engagement. The element upper portion of each fastener element includes: an upper surface extending in a width direction of the slide fastener orthogonal to a center line of the slide fastener; a front side surface extending in the width direction of the slide fastener; a rear side surface extending in the width direction of the slide fastener; a 1 st intermediate surface extending in the width direction of the slide fastener between the upper surface and the front side surface; and a 2 nd intermediate surface extending in the width direction of the slide fastener between the upper surface and the rear side surface, a 1 st boundary line being defined between the upper surface and the 1 st intermediate surface, and a 2 nd boundary line being defined between the upper surface and the 2 nd intermediate surface. The zipper is formed by: in the closed state of the slide fastener, the upper surface, the front side surface, and the rear side surface of the element upper portion of each fastener element do not cross the center line of the slide fastener. In the closed state of the slide fastener, the element upper portion of each of the front and rear fastener elements provided on the different fastener stringers of the pair of right and left fastener stringers and engaged adjacently on the centerline of the slide fastener is shaped as: when setting a 1 st virtual line that is provided on at least the core line provided on the side edge portion of the fastener tape and that is in contact with the 1 st boundary line and that extends parallel to the width direction of the fastener, and a 2 nd virtual line that is provided on at least the core line provided on the side edge portion of the fastener tape and that is in contact with the 2 nd boundary line and that extends parallel to the width direction of the fastener, the 1 st virtual line of the rear fastener element and the 2 nd virtual line of the front fastener element extend so as not to intersect each other with a gap SP therebetween.
Another aspect of the present disclosure relates to a slide fastener, comprising: a pair of right and left fastener stringers, each fastener stringer including: a fastener tape; and a plurality of fastener elements mounted on the side edge portion of the fastener tape at a predetermined interval, each fastener element including a lower element portion and an upper element portion provided below and above a plane in which the fastener tape is located, respectively, the lower element portion having at least one engaging portion and at least one engaged portion; and a slider that advances on the center line of the slide fastener so as to alternately engage each fastener element included in one of the pair of right and left fastener stringers with each fastener element included in the other of the pair of right and left fastener stringers, and retreats on the center line of the slide fastener so as to release the engagement. The element upper portion of each fastener element includes: an upper surface extending in a width direction of the slide fastener orthogonal to a center line of the slide fastener; a front side surface extending in the width direction of the slide fastener; a rear side surface extending in the width direction of the slide fastener; a 1 st intermediate surface extending in the width direction of the slide fastener between the upper surface and the front side surface; and a 2 nd intermediate surface extending in the width direction of the slide fastener between the upper surface and the rear side surface, a 1 st boundary line being defined between the upper surface and the 1 st intermediate surface, and a 2 nd boundary line being defined between the upper surface and the 2 nd intermediate surface. The fastener element has, in the element upper portion: an upper base end surface located on a tape surface of the fastener tape; and an upper tip end surface located outside the tape surface of the fastener tape. In the closed state of the slide fastener, the upper distal end surfaces of the fastener elements included in one of the pair of right and left fastener stringers and the upper distal end surfaces of the fastener elements included in the other of the pair of right and left fastener stringers are alternately arranged on both sides of the center line of the slide fastener. In the closed state of the slide fastener, the element upper portion of each of the front and rear fastener elements provided on the different fastener stringers of the pair of right and left fastener stringers and engaged adjacently on the centerline of the slide fastener is shaped as: when setting a 1 st virtual line that is provided on at least the core line provided on the side edge portion of the fastener tape and that is in contact with the 1 st boundary line and that extends parallel to the width direction of the fastener, and a 2 nd virtual line that is provided on at least the core line provided on the side edge portion of the fastener tape and that is in contact with the 2 nd boundary line and that extends parallel to the width direction of the fastener, the 1 st virtual line of the rear fastener element and the 2 nd virtual line of the front fastener element extend so as not to intersect each other with a gap SP therebetween.
Any of the above aspects can further include one or more of the following features or any combination of these features. Of course, the new embodiment can be grasped by replacing some of the features of any of the embodiments described above with any of the following features.
(1) In the closed state of the slide fastener, the 2 nd virtual line of the front fastener element coincides with or extends close to the 3 rd boundary line between the front side surface and the 1 st intermediate surface of the rear fastener element.
(2) In each of the fastener elements on the front side and the rear side, the upper surface width of the element upper portion of the fastener element, which is determined between the 1 st virtual line and the 2 nd virtual line, is within a range determined based on the lower limit value obtained by multiplying the 1/2 value of the width of the element upper portion and the upper limit value obtained by multiplying the 1/2 value by 1.2, which is determined based on the lower edge of the front side surface that is in contact with the fastener tape and extends in the width direction of the fastener and the lower edge of the rear side surface that is in contact with the fastener tape and extends in the width direction of the fastener.
(3) The 3 rd boundary line between the front side surface and the 1 st intermediate surface is defined, the 4 th boundary line between the rear side surface and the 2 nd intermediate surface is defined, and the 1 st to 4 th boundary lines are oriented substantially parallel to each other at least over the entire width of the core thread provided at the side edge portion of the fastener tape.
(4) The clearance is 1/3 or less of the interval between the 1 st virtual line and the 2 nd virtual line in one of the front side and rear side fastener elements, and/or the clearance is 1/5 or more of the interval between the 1 st virtual line and the 2 nd virtual line.
(5) The element upper portion of each fastener element further includes: a 1 st intermediate surface extending in the width direction of the slide fastener between the upper surface and the front side surface; and a 2 nd intermediate surface extending in the width direction of the slide fastener between the upper surface and the rear side surface, wherein the 1 st intermediate surface is a curved surface extending downward from a 1 st boundary line between the upper surface and the 1 st intermediate surface to a 3 rd boundary line between the 1 st intermediate surface and the front side surface while being curved, and the 2 nd intermediate surface is a curved surface extending downward from a 2 nd boundary line between the upper surface and the 2 nd intermediate surface to a 4 th boundary line between the 2 nd intermediate surface and the rear side surface while being curved.
(6) The fastener element upper portion of each fastener element has a width that increases as it moves away from the upper surface due to the inclination of the front side surface and the rear side surface. For example, as a result, it may have a shape with one end tapered.
(7) The front side surface and the rear side surface form an angle ranging from 75 degrees to 85 degrees with respect to the upper surface of the fastener tape.
(8) When the rear side surface of the front side fastener element and the front side surface of the rear side fastener element are moved in parallel to a common plane along the width direction of the slide fastener in the closed state of the slide fastener, at least a part of an isosceles triangle having an acute angle is formed between the rear side surface of the front side fastener element and the front side surface of the rear side fastener element.
(9) The fastener element upper part of each fastener element is provided with: an upper base end surface located on a tape surface of the fastener tape; and an upper distal end surface located outside the tape surface of the fastener tape, wherein in a closed state of the fastener, the upper distal end surface of each fastener element included in one of the pair of right and left fastener stringers and the upper distal end surface of each fastener element included in the other of the pair of right and left fastener stringers are alternately arranged on both sides of a center line of the fastener.
(10) The fastener element upper part of each fastener element is provided with: an upper base end surface located on a tape surface of the fastener tape; and an upper distal end surface located outside the tape surface of the fastener tape, wherein in a closed state of the fastener, when the upper distal end surfaces of the front fastener element and the rear fastener element of the front and rear fastener elements are moved in parallel to a common plane along the center line of the fastener, the upper distal end surfaces of the front fastener element and the upper distal end surfaces of the rear fastener element form at least a part of an isosceles triangle having an acute angle in a vertex angle.
(11) Each fastener element has a fastener element center line parallel to the width direction of the fastener, and the element upper portion and the element lower portion of each fastener element are provided on the fastener element center line and are formed to be symmetrical with respect to the fastener element center line.
(12) The upper surface of the element upper portion of each fastener element has an elongated rectangular profile along the element center line parallel to the width direction of the fastener.
(13) The element upper portion is a substantially rectangular parallelepiped portion formed in an elongated shape along an element center line parallel to the width direction of the slide fastener between an upper base end surface and an upper tip end surface, and the element lower portion is formed in an elongated shape along the element center line between a lower base end surface and a lower tip end surface.
(14) The element upper portion further comprises: a 1 st intermediate surface extending in the width direction of the slide fastener between the upper surface and the front side surface; and a 2 nd intermediate surface extending in the width direction of the fastener between the upper surface and the rear side surface, wherein, in each fastener stringer of the pair of right and left fastener stringers, an upper distal end surface of an upper portion of the fastener element is offset so as to be closer to a side edge portion of the fastener stringer than a lower distal end surface, and an intermediate surface is formed between the lower distal end surface and the upper distal end surface.
(15) The angle formed by the upper top end surface and the intermediate surface is equal to an angle in the range between 90 DEG and 100 deg.
(16) At least one condition of the following (i) and (ii) is satisfied: (i) The width of the middle surface gradually increases along the central line of the chain element along with the distance from the top end surface of the upper part, and then gradually decreases; and (ii) the intermediate surface has a true circular contour resulting from the upper tip surface cutting off the circular arc.
(17) The element lower part includes: a base having a lower base end surface; a head having a lower top end surface; and a neck portion having a centrally tapered shape such that there is a minimum element width between the base portion and the head portion.
(18) In each fastener stringer of the pair of right and left fastener stringers, the upper tip end face is located at a position closer to the tape outside of the fastener tape than the position of the minimum element width in the neck portion along the element center line; and/or in each fastener element of each fastener element chain of the pair of fastener element chains, the upper tip end face is located closer to the minimum element width in the neck portion than the lower tip end face or the topmost position of the lower tip end face in the direction along the element center line.
(19) The fastener element upper part of each fastener element is provided with: an upper base end surface located on a tape surface of the fastener tape; and an upper tip surface located on the opposite side of the upper base surface, the upper surface of the element upper portion including a total of 3 regions: a main region; a 1 st inclined region which is inclined gradually at a 1 st predetermined angle between the main region and the upper end of the upper base end surface; and a 2 nd inclined region which is inclined slowly at a 2 nd prescribed angle between the main region and the upper end of the upper top end surface.
Effects of the utility model
According to one aspect of the present disclosure, narrowing of the fastener element can be further promoted, and the sliding resistance of the slider can be further reduced.
Drawings
Fig. 1 is a schematic plan view of a slide fastener according to an embodiment of the present disclosure.
Fig. 2 is a schematic partial perspective view of the slide fastener, and the slider is not shown.
Fig. 3 is a schematic plan view of the slide fastener, schematically showing an engaged state of the left and right fastener elements with each other.
Fig. 4 is a left side view of the slide fastener in a closed state, and positions of the 1 st virtual line DL1 and the 2 nd virtual line DL2 are indicated by arrows.
Fig. 5 is a schematic partial cross-sectional view of the slide fastener along the chain line IV-IV of fig. 3.
Fig. 6 is a schematic perspective view of fastener elements attached to side edges of a fastener tape.
Fig. 7 is a schematic plan view of 2 adjacent fastener elements attached to a side edge portion of a fastener tape.
Fig. 8 is a schematic bottom view of 2 adjacent fastener elements attached to a side edge portion of a fastener tape.
Fig. 9 is a schematic side view of 2 adjacent fastener elements attached to the side edge portion of the fastener tape, and shows the upper distal end surface of the element upper portion and the lower distal end surface of the element lower portion on the upper and lower sides of the intermediate surface.
Fig. 10 is a schematic side view of 2 adjacent fastener elements attached to a side edge portion of a fastener tape (wherein the right element is a cross-sectional view), and an upper base end surface of an upper element portion and a lower base end surface of a lower element portion are shown above and below the fastener tape.
Description of the reference numerals
1 zipper 2 zipper teeth chain
3 zipper belt 4 zipper teeth
Lower part of 5 chain teeth and upper part of 6 chain teeth
7 intermediate surface 8 shoulder
9 pull head 51 base
52 neck 53 head
54 lower base end surface 55 lower tip end surface
58 engaged portion 59 is engaged with
61 upper surface 61a main area
61b 1 st incline zone 61c 2 nd incline zone
62 front side 63 rear side
64 upper base end face 65 upper tip end face
71 a middle region of the placement region 72
Detailed Description
Various embodiments and features are described below with reference to the drawings. The embodiments and/or features can be combined without undue explanation by those skilled in the art, and the synergistic effect of the combination can be understood. The repeated explanation between the embodiments is omitted in principle. The utility model is described mainly with reference to the drawings, and is simplified for convenience of drawing. The various features are not only valid for the slide fastener shown in this application, but should be understood to be also generic to other various slide fasteners not shown in this specification.
In the present specification, the terms indicating the reference direction of the slide fastener refer to the front-rear direction, the left-right direction, and the up-down direction in an orthogonal relationship with each other. As terms indicating the reference direction of the fastener tape, the tape width direction, the tape length direction, and the tape thickness direction in orthogonal relation to each other are referred to. As terms indicating the reference direction of the fastener element, reference is made to the element center line, the element width direction, and the element thickness direction, which are in an orthogonal relationship with each other. Although not limited thereto, the front-rear direction, the tape length direction, and the element width direction refer to the same direction or parallel to each other. Also, the left-right direction, the tape width direction and the element center line refer to the same direction or they are parallel to each other. Also, the up-down direction, the tape thickness direction, and the element thickness direction refer to the same direction or they are parallel to each other.
The front-rear direction coincides with the moving direction of the slider 9 for opening and closing the slide fastener 1, and coincides with the longitudinal direction of the slide fastener 1. The right-left direction is a direction orthogonal to the front-rear direction, and coincides with the width direction of the slide fastener 1. The vertical direction is a direction orthogonal to the front-rear direction and the left-right direction. Of course, the vertical direction does not need to coincide with the vertical direction (gravitational direction). That is, the term indicating the direction referred to in the present specification is independent of the vertical direction (gravitational direction).
The slide fastener 1 will be described with reference to fig. 1 to 10. Fig. 1 is a schematic plan view of the slide fastener 1. Fig. 2 is a schematic partial perspective view of the slide fastener 1, and the slider 9 is not shown. Fig. 3 is a schematic plan view of the slide fastener 1, schematically showing an engaged state of the left and right fastener elements 4, 4'. Fig. 4 is a left side view of the slide fastener 1 when the slide fastener 1 is in a closed state. At this time, the upper distal end face 65 of each fastener element 4 included in one of the pair of right and left fastener stringers 2, 2 'and the upper distal end face 65' of each fastener element 4 'included in the other of the pair of right and left fastener stringers 2, 2' are alternately arranged on both sides of the center line CL of the slide fastener 1. Fig. 5 is a schematic partially sectional view of the slide fastener 1 along the chain line IV-IV of fig. 3. Fig. 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 plan view of 2 adjacent fastener elements attached to the side edge portions 31 of the fastener tapes 3, 3'. Fig. 8 is a schematic bottom view of 2 adjacent fastener elements 4 attached to the side edge portions 31 of the fastener tapes 3, 3'. Fig. 9 is a schematic side view of 2 adjacent fastener elements 4 attached to the side edge portions 31 of the fastener tapes 3, 3', and shows the upper distal end surface 65 of the element upper portion 6 and the lower distal end surface 55 of the element lower portion 5 above and below intermediate surfaces 7, 7', which will be described later. Fig. 10 is a schematic side view (wherein, the right element is a cross-sectional view) of 2 adjacent fastener elements 4 attached to the side edge portion 31 of the fastener tape 3, 3', and the upper base end surface 64 of the element upper portion 6 and the lower base end surfaces 54, 54' of the element lower portion 5 are shown above and below the fastener tape 3, 3 '.
Typically, the slide fastener 1 is a flexible long member extending in a long manner in the front-rear direction with a substantially constant left-right width. The slide fastener 1 has a pair of right and left fastener stringers 2, 2' and a slider 9. In order to alternately engage each fastener element 4 included in one of the pair of right and left fastener stringers 2, 2' with each fastener element 4' included in the other of the pair of right and left fastener stringers 2, 2', the slider 9 is advanced on the center line CL of the slide fastener 1, and in order to release the engagement, the slider 9 is retracted on the center line CL of the slide fastener 1. As the slider 9, a slider of a general structure can be adopted. The slider 9 includes: the fastener elements 4 and 4' described later have upper flanges on the element upper portions 6 and 6', lower flanges on the element lower portions 5 and 5', and connecting columns for connecting the upper flanges and the lower flanges. The left and right fastener elements 4, 4' in the engaged state are disengaged from each other by the coupling post. The coupling post of the slider 9 is provided to guide the movement of the element lower portions 5, 5 'during both the engagement and disengagement of the fastener elements 4, 4'. In both the engagement and disengagement of the fastener elements 4, 4', whether or not the element upper portions 6, 6' are in contact with the coupling post of the slider 9 is arbitrary, and a gap may be provided therebetween.
In order to engage the fastener elements 4, 4', the arrangement of the fastener elements is shifted by half a pitch (Pi/2) in the front-rear direction, and the left and right fastener stringers 2, 2' are identical in structure except for this point (or the left and right fastener stringers 2, 2' are in mirror-symmetrical relation except for this point). Therefore, the description of the left fastener stringer 2 is also applicable to the right fastener stringer 2'. Elements of the right fastener stringer 2' corresponding to elements of the left fastener stringer 2 are denoted by the same arabic numerals as those assigned to the elements of the left fastener stringer 2 with an apostrophe.
The fastener stringers 2, 2' include: fastener strips 3, 3'; and a plurality of fastener elements 4, 4 'attached to side edge portions 31, 31' (typically, core wires 33, 33 'provided therein) of fastener tapes 3, 3' at a predetermined pitch Pi. The tape length LN3 of the fastener tapes 3, 3' is larger than the tape width W3. The fastener elements 4, 4 'are attached to the side edge portions 31, 31' of the fastener tapes 3, 3', respectively, at predetermined pitches Pi along the tape length direction of the fastener tapes 3, 3'. The fastener tapes 3, 3' are woven fabrics, knitted fabrics or a mixture thereof, and have high flexibility. The fastener elements 4 and 4' are resin elements attached to the side edge portions 31 and 31' of the fastener tapes 3 and 3' by injection molding. Examples of the material of the fastener elements 4, 4' include nylon, polyacetal, polyamide, polypropylene, polybutylene terephthalate, polycarbonate, and the like, and other materials may be used.
The fastener tapes 3, 3' have tape surfaces 36, 36' and tape lower surfaces 37, 37' as tape surfaces, and have a substantially constant tape thickness defined by them. The upper surfaces 36, 36' and the lower surfaces 37, 37' of the fastener tapes 3, 3' are uneven surfaces having irregularities corresponding to the woven or knitted texture of the tapes, but can be regarded as 2-dimensional planes. The fastener tapes 3 and 3' can be divided into side edge portions 31 and 31' to which the fastener elements 4 and 4' are attached, and remaining tape main body portions 32 and 32' other than the side edge portions 31 and 31 '. Core wires 33, 33 'may be provided at the side edge portions 31, 31'. The core wires 33, 33 'extend in an elongated shape along the side edge portions 31, 31'. The core wires 33, 33' include: a core thread upper portion protruding upward from the tape upper surfaces 36, 36 'of the fastener tapes 3, 3'; and a core lower portion protruding downward from the tape lower surfaces 37, 37 'of the fastener tapes 3, 3'. One of the upper core wire portion and the lower core wire portion may be omitted.
The fastener element 4, 4' comprises an element lower portion 5, 5' and an element upper portion 6, 6'. The lower element portions 5, 5' and the upper element portions 6, 6' are respectively disposed below and above the plane in which the fastener tapes 3, 3' are disposed. The element upper portion 6, 6' may be a substantially rectangular parallelepiped-shaped portion. The element lower portions 5, 5' may have at least one engaging portion 58 and at least one engaged portion 59. The fastener tape 3, 3' has side edges 31, 31' and/or core wires 33, 33' sandwiched between the fastener element lower portions 5, 5' and the fastener element upper portions 6, 6' in the fastener element thickness direction. The element lower portions 5, 5' include portions that contact and are fixed to the tape lower surfaces 37, 37' of the fastener tapes 3, 3'. The element upper portions 6, 6 'include portions that contact the tape surfaces 36, 36' of the fastener tapes 3, 3 'and are fixed to the tape surfaces 36, 36'. Outside the tape surfaces of the fastener tapes 3, 3', the element lower portions 5, 5' and the element upper portions 6, 6' are laminated in a direct bonding manner.
The fastener elements 4, 4 'have element centerlines CX parallel to the tape widths of the fastener tapes 3, 3'. The element center line CX is parallel to the width direction of the slide fastener 1 and is located at the center position in the width direction of the fastener elements 4, 4'. The element upper parts 6, 6 'are shorter than the element lower parts 5, 5' on the element center line CX. For example, the length L6 of the element upper portions 6, 6' is greater than 2/3 of the length L5 of the element lower portions 5, 5' and less than 4/5 of the length L5 of the element lower portions 5, 5 '.
The element upper portions 6 and 6' may be substantially rectangular parallelepiped portions (element widths smaller than element lengths) formed in an elongated shape along the element center line CX between the upper base end surfaces 64 and 64' and the upper tip end surfaces 65 and 65 '. The element lower portions 5 and 5' may be formed in an elongated shape along the element center line CX between the lower base end surfaces 54 and 54' and the lower tip end surfaces 55 and 55' along the element center line CX. Thus, the fastener elements 4, 4' are also formed in an elongated shape as a whole, and can simulate the appearance of a metal fastener element. Further, the upper base end surfaces 64, 64' are located on the tape surfaces 36, 36' of the fastener tapes 3, 3 '. The upper tip end faces 65, 65 'are located outside the tape faces of the fastener tapes 3, 3'. The lower base end surfaces 54, 54' are located on the lower tape surfaces 37, 37' of the fastener tapes 3, 3 '. The lower tip end faces 55, 55 'are located outside the tape faces of the fastener tapes 3, 3'.
Each element upper portion 6, 6' comprises a single elongate shaped portion (in the illustrated embodiment, formed using the single elongate shaped portion) comprising: upper surfaces 61, 61' extending in the width direction of the slide fastener 1 (for example, element center line CX) orthogonal to the center line CL of the slide fastener 1; front side surfaces 62, 62' extending in the width direction (e.g., element center line CX) of the slide fastener 1; and rear side surfaces 63, 63' extending in the width direction (e.g., element center line CX) of the slide fastener 1. The same applies to the single elongated portion, in which the element upper portions 6, 6' are provided on the element center line CX and extend along the element center line CX. As an option, each element upper part 6, 6' further comprises: 1 st intermediate surfaces 66, 66' extending along the width direction of the slide fastener 1 (e.g., element center line CX) between the upper surfaces 61, 61' and the front side surfaces 62, 62 '; and a 2 nd intermediate surface 67, 67' extending between the upper surface 61, 61' and the rear side surface 63, 63' along the width direction of the slide fastener 1 (for example, the element center line CX). By providing the 1 st intermediate surfaces 66 and 66 'and the 2 nd intermediate surfaces 67 and 67', the fastener elements 4 and 4 'can be seen to have a narrower width when the fastener elements 4 and 4' are seen in plan view (see, for example, fig. 1 and 3). Further, the single elongated shaped portion may be a substantially rectangular parallelepiped shaped portion as described above.
A 1 st boundary line L1 is defined between the upper surfaces 61, 61 'and the 1 st intermediate surfaces 66, 66', a 2 nd boundary line L2 is defined between the upper surfaces 61, 61 'and the 2 nd intermediate surfaces 67, 67', a 3 rd boundary line L3 is defined between the front side surfaces 62, 62 'and the 1 st intermediate surfaces 66, 66', and a 4 th boundary line L4 is defined between the rear side surfaces 63, 63 'and the 2 nd intermediate surfaces 67, 67' (see fig. 3). The 1 st intermediate surfaces 66, 66' may be curved surfaces extending downward from the 1 st boundary line L1 between the upper surfaces 61, 61' and the 1 st intermediate surfaces 66, 66' to the 3 rd boundary line L3 (for example, the curvature is fixed or changed and/or curved) between the 1 st intermediate surfaces 66, 66' and the front side surfaces 62, 62', but not limited thereto, and may be flat inclined surfaces. The 2 nd intermediate surfaces 67, 67' are curved surfaces extending downward from the 2 nd boundary line L2 between the upper surfaces 61, 61' and the 2 nd intermediate surfaces 67, 67' to the 4 th boundary line L4 (for example, the curvature is fixed or changed and/or curved) between the 2 nd intermediate surfaces 67, 67' and the rear side surfaces 63, 63', but the present invention is not limited thereto and may be flat inclined surfaces.
In an exemplary manner, as viewed from the width direction of the slide fastener 1 (for example, see fig. 4), the 1 st intermediate surfaces 66, 66' and the 2 nd intermediate surfaces 67, 67' are curved surfaces with fixed curvatures, and can be easily distinguished from the upper surfaces 61, 61' that are seen to be substantially flat. The upper surfaces 61, 61' may not be entirely flat surfaces, but rather may be slightly curved away from the element center line CX with a curvature that is small compared to the curvature of the 1 st intermediate surface 66 (e.g., less than 1/10 of that). In this way, the 1 st boundary line L1 can be defined between the 1 st intermediate surface 66 and the upper surfaces 61, 61'. The same applies to the 2 nd boundary line L2 between the upper surfaces 61, 61 'and the 2 nd intermediate surfaces 67, 67'. In an exemplary manner, the front side surface 62 and the rear side surface 63 are inclined surfaces having a constant slope, that is, non-curved surfaces, as shown in fig. 4. Therefore, the boundary between the 1 st intermediate surface 66 and the front side surface 62 can be set as the bending start point of the 1 st intermediate surface 66. Similarly, the boundary between the 2 nd intermediate surface 67 and the rear side surface 63 can be set as the bending start point of the 2 nd intermediate surface 67.
In some cases, the 1 st to 4 th boundary lines L1, L2, L3, L4 are oriented substantially parallel to each other at least over the entire width of the core thread 33 provided at the side edge portions 31, 31 'of the fastener tapes 3, 3' (or the main region 61a of the upper surface 61 of the element upper portion 6 described later). This is a result of the upper surfaces 61, 61', the front sides 62, 62', the rear sides 63, 63', the 1 st intermediate surfaces 66, 66' and the 2 nd intermediate surfaces 67, 67' extending in parallel in the same direction.
The interval between the 1 st boundary line L1 and the 2 nd boundary line L2 can be slightly increased as approaching the upper base end surface 64. The interval between the 3 rd boundary line L3 and the 4 th boundary line L4 can be slightly increased as approaching the upper base end surfaces 64, 64'. The interval between the 1 st boundary line L1 and the 2 nd boundary line L2 can be slightly increased as approaching the upper tip end surfaces 65, 65'. The interval between the 3 rd boundary line L3 and the 4 th boundary line L4 can be slightly increased as approaching the upper tip end faces 65, 65'. That is, the 1 st boundary line L1 and/or the 3 rd boundary line L3 may include inclined lines that incline forward as they approach the upper base end surfaces 64, 64 'or the upper tip end surfaces 65, 65', respectively. Similarly, the 2 nd boundary line L2 and/or the 4 th boundary line L4 may include inclined lines inclined rearward as they approach the upper base end surfaces 64, 64 'or the upper tip end surfaces 65, 65', respectively.
The element upper portion 6 has an elongated rectangular profile (in plan view) along the element center line CX. The upper surface 61 of the element upper portion 6 also has an elongated rectangular profile along the element center line CX in the same manner (in plan view). Since the element upper portion 6 and the upper surface 61 are elongated, the element 4 is actually made of resin, but looks like a metallic element.
In the present embodiment, in the closed state of the slide fastener 1 in which each fastener element 4 included in one of the pair of right and left fastener stringers 2, 2' is engaged with each fastener element 4' included in the other of the pair of right and left fastener stringers 2, 2', the element upper portions 6, 6' of the fastener elements 4, 4' are formed so as not to cross the center line CL of the slide fastener 1 (in other words, so as not to intersect). In other words, the element upper portions 6, 6 'of the fastener elements 4, 4' are formed such that none of the upper surfaces 61, 61', the front side surfaces 62, 62', the rear side surfaces 63, 63', and the upper tip end surfaces 65, 65' cross the center line CL of the fastener 1 (in other words, do not intersect). In this case, narrowing of the fastener element can be further promoted, and the sliding resistance of the slider can be further reduced. More specifically, the appearance of the fastener elements 4, 4' can be simulated with a metal element as a pattern (motif) rather than actually simulating the shape of a metal element. As a result, narrowing of the fastener elements 4, 4 'and narrowing of the pitch of the fastener elements 4, 4' can be promoted, and the sliding resistance of the slider 9 can be reduced (that is, the slider 9 can be moved with a smaller force to open and close the slide fastener 1). According to circumstances, the mechanical strength of the fastener elements 4, 4 'can be improved and/or simplification of the mold for injection molding of the fastener elements 4, 4' can be promoted.
Specifically, narrowing the fastener elements 4, 4 'reduces the pitch Pi of the fastener elements 4, 4', and also reduces the sliding resistance of the slider 9 for opening and closing the slide fastener 1. That is, the slider 9 can be moved with a smaller force to open and close the slide fastener 1.
As shown in fig. 1, when the fastener elements 4, 4 'are engaged, the element upper portions 6, 6' are arranged in a zigzag form on both sides of the center line CL of the fastener 1. Similarly, when the fastener elements 4, 4' are engaged, the upper surface 61 of the element upper portion 6 of the left fastener element 4 and the upper surface 61 of the element upper portion 6' of the right fastener element 4' are arranged in a zigzag pattern on both sides of the center line CL of the fastener 1. Since the element upper portions 6 and 6' have portions facing each other in the width direction of the slide fastener 1, even if the slide fastener 1 is twisted, the element upper portions 6 and 6' interfere with each other, and the fastener elements 4 and 4' are prevented from being disengaged from each other.
As described with reference to fig. 3, in the closed state of the slide fastener 1, the front and rear fastener elements E1, E2 among the front and rear fastener elements E1, E2 which are provided in the different fastener element stringers 2, 2 'of the pair of right and left fastener element stringers 2, 2' and are engaged adjacently on the center line CL of the slide fastener 1 are formed such that the fastener element upper portions 6, 6 'of the fastener elements 4, 4' include the front fastener element E1 and the rear fastener element E2: when setting a 1 st virtual line DL1 that is in contact with the 1 st boundary line L1 at least on the core lines 33, 33 'provided to the side edge portions 31, 31' of the fastener tapes 3, 3 '(japanese: protected) and that extends parallel to the width direction of the fastener 1, and a 2 nd virtual line DL2 that is in contact with the 2 nd boundary line L2 at least on the core lines 33, 33' provided to the side edge portions 31, 31 'of the fastener tapes 3, 3', and that extends parallel to the width direction of the fastener 1, the 1 st virtual line DL1 of the rear fastener element E2 and the 2 nd virtual line DL2 of the front fastener element E1 extend so as to be separated by a gap SP therebetween without intersecting. This makes it possible to sufficiently narrow the upper surfaces 61, 61 'of the element upper portions 6, 6'. The 1 st virtual line DL1 is located at a position where it contacts the 1 st boundary line L1 (is inscribed in the fastener elements 4, 4') when the line parallel to the width direction of the fastener 1 is moved forward parallel to the element center line CX. Similarly, the 2 nd virtual line DL2 is located at a position where it contacts the 2 nd boundary line L2 (is inscribed in the fastener elements 4, 4') when the line parallel to the width direction of the fastener 1 is moved in parallel from the element center line CX to the rear. The 3 rd and 4 th virtual lines L3 and L4 can be set similarly to the 3 rd and 4 th virtual lines.
Additionally or alternatively, in the closed state of the slide fastener 1, the 2 nd virtual line DL2 of the front fastener element E1 coincides with or extends so as to be close to the 3 rd boundary lines L3, L3' between the front side surfaces 62, 62' and the 1 st intermediate surfaces 66, 66' of the rear fastener element E2. This ensures a proper width of the upper surfaces 61, 61 'of the left and right element upper portions 6, 6'. Additionally or alternatively, among the fastener elements E1, E2 on the front and rear sides, the width W61 of the upper surfaces 61, 61' of the fastener element upper portions 6, 6' of the fastener elements 4, 4' defined between the 1 st virtual line DL1 and the 2 nd virtual line DL2 falls within a range defined based on a lower limit value obtained by multiplying the 1/2 value of the width W6 of the element upper portions 6, 6' by 0.8 and an upper limit value obtained by multiplying the 1/2 value by 1.2, and the width W6 of the element upper portions 6, 6' is defined based on the lower edge of the front side surfaces 62, 62' which are in contact with the fastener tapes 3, 3' and extend in the width direction of the fastener 1 and the lower edge of the rear side surfaces 63, 63' which are in contact with the fastener tapes 3, 3' and extend in the width direction of the fastener 1. Note that if the widths of the upper surfaces 61, 61' of the left and right element upper portions 6, 6' are small, the appearance of the fastener elements 4, 4' becomes dissimilar from that of the metallic fastener elements. For example, the width W6 of the element upper portion 6 is 1.3mm or more. The length L6 of the element upper part 6 is more than 2.9 mm.
The width of the upper surface 61 of the element upper portion 6 of the left fastener element 4 can be understood as being defined by the 1 st virtual line DL1 and the 2 nd virtual line DL2, but can also be understood as being defined between the 1 st boundary line L1 and the 2 nd boundary line L2. The width of the upper surface 61 of the element upper 6 is smaller than the width of the element upper 6 in the same direction due to the inclination of the front side surface 62 and the rear side surface 63 of each element upper 6.
The gap SP may be 1/3 or less of the distance between the 1 st virtual line DL1 and the 2 nd virtual line DL2 in one of the fastener elements E1, E2 on the front and rear sides, and/or 1/5 or more of the distance between the 1 st virtual line DL1 and the 2 nd virtual line DL 2. By setting the gap SP to an appropriate size, the upper surfaces 61, 61' can be set to an appropriate width.
As shown in fig. 2, regarding each fastener element 4, 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 reduction in the attachment strength of the fastener element 4 to the fastener tapes 3, 3' may be caused by narrowing the width of the element upper portion 6, but the reduction in the attachment strength can be compensated for by increasing the height H6 relatively to the width W6. The height H6 is equal to a distance from the tape surfaces 36, 36 'of the fastener tapes 3, 3' or a plane included therein to the upper surface 61 (for example, a main region 61a described later) of the element upper portion 6. The fastener element disclosed in patent document 1 is designed under the condition of (H6/W6) < 0.8 because the degree of protrusion is suppressed.
The front side surfaces 62, 62 'and the rear side surfaces 63, 63' described above may be inclined surfaces with respect to the tape surfaces 36, 36 'of the fastener tapes 3, 3' rather than vertical surfaces. Specifically, the front side surfaces 62, 62 'are downward inclined surfaces that approach the tape surfaces 36, 36' of the fastener tapes 3, 3 'as they extend forward from the upper surfaces 61, 61'. Similarly, the rear side surfaces 63, 63 'are downward inclined surfaces of the tape surfaces 36, 36' which approach the fastener tapes 3, 3 'as they extend rearward from the upper surfaces 61, 61'. In order to promote narrowing of the fastener elements 4, 4', it is preferable that the front side surfaces 62, 62' and the rear side surfaces 63, 63' form angles in the range of 75 ° to 85 ° with respect to the tape surfaces 36, 36' of the fastener tapes 3, 3', respectively. Further, since the front side surfaces 62 and 62' and the rear side surfaces 63 and 63' are inclined, the element upper portions 6 and 6' of the fastener elements 4 and 4' become wider as they are away from the upper surfaces 61 and 61 '. As a result, for example, the element upper portions 6, 6' have a tapered shape at one end.
As shown in fig. 4, in some cases, when the rear side face 63 of the front fastener element 4 and the front side face 62' of the rear fastener element 4 are moved in parallel to a common plane along the width direction of the fastener 1 in the closed state of the fastener 1, the rear side face 63 of the front fastener element 4 and the front side face 62' of the rear fastener element 4' form at least a part of an equilateral triangle RC having an acute angle in the apex. In other words, the oblique line including the rear side face 63 of the fastener element 4 that is parallel-moved to the front side on the common plane and the oblique line including the front side face 62 'of the fastener element 4' that is parallel-moved to the rear side on the common plane form an equilateral triangle RC whose apex angle is an acute angle. In this way, symmetry (with respect to the center line CL of the slide fastener 1) of the left and right fastener elements 4, 4' is improved.
As can be understood by referring to fig. 5, in the closed state of the slide fastener 1, when the upper distal end face 65 of the front fastener element 4 of the front and rear fastener elements E1, E2 and the upper distal end face 65 'of the rear fastener element 4' of the front and rear fastener elements E1, E2 are moved in parallel along the center line CL of the slide fastener 1 to a common plane, the upper distal end face 65 of the front fastener element 4 and the upper distal end face 65 'of the rear fastener element 4' form at least a part of an isosceles triangle having an acute angle as a vertex. In other words, the oblique line including the upper tip end face 65 of the front side fastener element 4 that moves in parallel to the common plane and the oblique line including the upper tip end face 65 'of the rear side fastener element 4' that moves in parallel to the common plane form an isosceles triangle RC1 whose apex angle is an acute angle. In this way, symmetry (with respect to the center line CL of the slide fastener 1) of the left and right fastener elements 4, 4' is improved. In the isosceles triangle RC shown in fig. 4 and the isosceles triangle RC1 shown in fig. 5, the former has the apex angle facing upward, and the latter has the apex angle facing downward. The angle of the apex angle of the isosceles triangle RC is preferably in the range of 10 ° to 40 °, more preferably in the range of 15 ° to 30 °. The angle of the apex angle of the isosceles triangle RC1 is preferably in the range of 5 ° to 20 °, more preferably in the range of 7 ° to 13 °.
The shape of the fastener elements 4, 4' will be described in detail below without limitation. The element upper portions 6 and 6' are block-shaped portions provided above the fastener tapes 3 and 3', and have upper surfaces 61 and 61', front side surfaces 62 and 62', rear side surfaces 63 and 63', upper base end surfaces 64 and 64', and upper tip end surfaces 65 and 65'. Typically, the element upper portions 6 and 6' are configured not to engage with the element upper portions 6 and 6' of the fastener elements 4 and 4' which are the opposite side of the engagement of the fastener elements 4 and 4' including the element upper portions 6 and 6' (i.e., not to include an engagement structure (e.g., a pair of one or more engagement portions and one or more engaged portions)). The engagement function of the fastener elements 4, 4 'can be ensured only by the element lower portions 5, 5'.
The front side surfaces 62, 62', the rear side surfaces 63, 63', the upper base end surfaces 64, 64', and the upper tip end surfaces 65, 65' are one side surface of the element upper portions 6, 6', respectively. The front side surfaces 62, 62 'and the rear side surfaces 63, 63' extend in parallel so as to be orthogonal or substantially orthogonal to the side edge portions 31, 31 'of the fastener tapes 3, 3'. More specifically, the front side surfaces 62 and 62 'and the rear side surfaces 63 and 63' extend along the element center line CX between the upper base end surfaces 64 and 64 'and the upper tip end surfaces 65 and 65'. The upper base end surfaces 64, 64 'are located on the tape surfaces of the fastener tapes 3, 3', and more specifically, rise upward from the tape surfaces 36, 36 'of the fastener tapes 3, 3'. The upper distal end surfaces 65 and 65' are located outside the tape surfaces of the fastener tapes 3 and 3', and more specifically, rise upward from intermediate surfaces 7 and 7', which will be described later. The upper distal end surfaces 65, 65 'are located outside the fastener tapes 3, 3' when viewed from the upper base end surfaces 64, 64', and more specifically, the side edge portions 31 beyond the fastener tapes 3, 3' are located away from the upper base end surfaces 64, 64 'outside the fastener tapes 3, 3'. Preferably, the corners of the joint portions of the side surfaces are rounded. The tape outside means a direction from a position on the tape surface of the fastener tape toward a position outside the tape surface for a certain fastener stringer, and is typically orthogonal to a side edge portion (or core thread) of the fastener tape.
As described above, the upper surfaces 61, 61' may have an elongated rectangular profile along the element centerline CX. Additionally or alternatively, when the width of the upper surfaces 61, 61 'is W61 and the length of the upper surfaces 61, 61' is L61 (see fig. 7), 1.7 < L61/W61 < 2.3 can be satisfied. The 1 st intermediate surfaces 66, 66' and the 2 nd intermediate surfaces 67, 67' (in the case where these are omitted, the front side surfaces 62, 62' and the rear side surfaces 63, 63 ') are joined to 2 long sides included in the rectangular outline of the upper surfaces 61, 61', respectively. The upper base end surfaces 64, 64' and the upper tip end surfaces 65, 65' are joined to 2 short sides included in the rectangular outline of the upper surfaces 61, 61', respectively. Preferably, the corners of the joint between the upper surfaces 61, 61' and the respective surfaces are rounded by chamfering. Since the front side surface 62, the rear side surfaces 63, 63', the upper base end surface 64, and the upper tip end surface 65 are inclined, the upper surface 61 can be a region reduced in plan view shape (outline) of the element upper portion 6.
In order to make the upper surfaces 61, 61' appear narrower, the front sides 62, 62' and the rear sides 63, 63' may be inclined. That is, the front side surfaces 62 and 62 'are inclined so as to be away from the element center line CX as they extend downward from the upper surfaces 61 and 61' (or the 1 st intermediate surfaces 66 and 66 '), and the rear side surfaces 63 and 63' are inclined so as to be away from the element center line CX as they extend downward from the upper surfaces 61 and 61 '(or the 2 nd intermediate surfaces 67 and 67') (see fig. 9 and 10). As a result, the element upper portions 6, 6' are formed in a trapezoid shape as viewed in a direction along the element center line CX. Here, the upper surfaces 61, 61' coincide with the upper bases of the trapezoids.
The upper base end surfaces 64, 64 'may be inclined so as to be away from the upper tip end surfaces 65, 65' as they extend downward from the upper surfaces 61, 61', and the upper tip end surfaces 65, 65' may be inclined so as to be away from the upper base end surfaces 64, 64 'as they extend downward from the upper surfaces 61, 61' (see fig. 5). When the plane of the upper tape surfaces 36, 36 'of the fastener tapes 3, 3' is taken as a reference, the plane forms an angle θ with the upper base end surface 64 64 (see FIG. 5) may be greater than the angle θ formed by the plane and the front face 62 62 (see FIG. 10) and is greater than the angle theta formed by the plane and the rear sides 63, 63 63 (see FIG. 10). For the planeAngle θ with upper tip surface 65 65 The same applies to the above-described case. Due to the formation of the angle theta 62 And the composition angle theta 63 The outer appearance of the elongated shape of the element upper portion 6 and the attachment strength of the fastener element 4 can be well combined.
The upper surfaces 61, 61 'of the element upper parts 6, 6' may be constituted by a single two-dimensional surface or by a plurality of two-dimensionally connected surfaces. In the latter case, as shown in fig. 4, the upper surfaces 61, 61' may be constituted by a total of 3 areas of the main area 61a, the 1 st inclined area 61b, and the 2 nd inclined area 61c (refer to fig. 5). The 1 st inclined region 61b is formed at a 1 st predetermined angle θ between the main region 61a and the upper end of the upper base end surface 64 61b Slowly incline. The 2 nd inclined region 61c is formed at a 2 nd predetermined angle θ between the main region 61a and the upper end of the upper tip surface 65 61c Slowly incline.
The main region 61a may be a flat face oriented parallel to the tape upper surface 36, 36' of the fastener tape 3, 3' or a plane containing the tape upper surface 36, 36 '. 1 st prescribed angle theta 61b The angle formed by the plane of the main region 61a and the 1 st inclined region 61b may be the same. 2 nd prescribed angle theta 61c The angle formed by the plane of the main region 61a and the 2 nd inclined region 61c may be set. Is advantageous in that the 2 nd prescribed angle theta 61c Less than the 1 st prescribed angle theta 61b . This makes it easy to make the upper distal end surface 65 have a sufficient height, and, for example, when the fastener 1 is twisted, it is possible to prevent the fastener element upper portions 6, 6 'from interfering with each other and causing the fastener element 4, 4' to be disengaged.
As will be further described with reference to fig. 5, the upper base end surface 64 extends steeply upward between the position P1 and the position P2. The upper surface 61 extends between position P2 and position P5. Specifically, the 1 st inclination region 61b is inclined gradually upward from the position P2 toward the position P3. The main region 61a extends horizontally between the position P3 and the position P4. The 2 nd inclination region 61c is inclined gradually downward from the position P4 toward the position P5. The upper tip surface 65 extends steeply downward between the position P5 and the position P6. The distance between position P1 and position P2 and the distance between position P5 and position P6 are both sufficiently small compared to the distance between position P2 and position P5.
As described above, the element lower portions 5 and 5' are elongated along the element center line CX between the lower base end surfaces 54 and 54' and the lower tip end surfaces 55 and 55', and are formed to have at least one engagement portion 58 and at least one engaged portion 59 between the lower base end surfaces 54 and 54' and the lower tip end surfaces 55 and 55 '. Typically, the element lower portion 5 is configured to engage with the element lower portions 5', 5' of 2 fastener elements 4', 4' of the opposite side of the engagement of the fastener element 4 including the element lower portion 5. For this purpose, the engaging portion 58 and the engaged portion 59 are formed in appropriate shapes. Typically, the engaging portion 58 protrudes along the centerline CL of the slide fastener 1 or an axis parallel to the centerline CL. Typically, the engaged portion 59 is recessed along the center line CL of the slide fastener 1 or an axis parallel to the center line CL.
The lower base end surfaces 54, 54 'stand downward from the tape lower surfaces 37 of the fastener tapes 3, 3'. The side edge portion 31 of the lower top end surface 55, 55' beyond the fastener tape 3, 3' is located away from the lower base end surface 54, 54' (i.e., outside the tape surface of the fastener tape 3, 3 ') outside the tape surface of the fastener tape 3, 3 '. The lower distal end surfaces 55, 55' may be curved surfaces most protruding on the element center axis CX of the fastener element 4. As shown in fig. 5, the lower distal end surfaces 55, 55' are steeply inclined downward from the position P8 toward the position P7. The lower tip surfaces 55, 55' may include gentle curved surfaces in the vicinity of the position P7.
In some cases, the upper distal end surface 65 is offset closer to the side edge portion 31 (or the core wire 33) of the fastener tape 3, 3 'than the lower distal end surface 55, 55', and an intermediate surface 7, 7 'is formed between the lower distal end surface 55, 55' and the upper distal end surface 65. This makes it easier to give priority to narrowing of the element upper portions 6, 6'. At this time, since the fastener element upper portions 6, 6' are narrow in width, the appearance of the fastener element 4 similar to that of the metallic fastener element can be ensured. In this way, the fastener element 4 having a narrower width similar to the metal fastener element and having the metal fastener element as a pattern can be provided.
The intermediate surfaces 7, 7' may be flat surfaces perpendicular to the element thickness direction, but are not limited thereto, and may be formed with a fastener tape3. 3' lie in the same plane. Preferably, the intermediate face 7, 7' is located in the same plane as the tape upper face 36, 36' of the fastener tape 3, 3', or in a position closer to the plane of the tape upper face 36, 36' than the tape lower face 37 of the fastener tape 3, 3 '. In this case, the thickness of the element lower portions 5, 5' below the intermediate surfaces 7, 7' can be sufficiently ensured, and the engagement strength between the fastener elements 4, 4' can be improved. Typically, the angle θ1 between the upper tip surface 65 and the intermediate surfaces 7, 7' is equal to an angle in a range between 90 ° and 100 ° (see fig. 5). The angle θ formed by the lower tip surfaces 55, 55' and the intermediate surfaces 7, 7 55 An angle in the range between 80 ° and 90 ° (refer to fig. 5). The intermediate surfaces 7, 7' may be inclined surfaces or uneven surfaces.
The top view shape of the intermediate surfaces 7, 7' (or the exposed shape when the fastener elements 4, 4' are not engaged) may depend on the engagement structure of the element lower portions 5, 5 '. Typically, (i) the width of the intermediate faces 7, 7' increases gradually along the element centerline CX as it moves away from the upper tip face 65, and then decreases gradually; and/or the intermediate faces 7, 7' have a perfectly circular profile obtained by cutting off the circular arc from the upper tip face 65.
As can be appreciated from fig. 3, the intermediate face 7 of the fastener element 4 may include: 2 mounting areas 71 for mounting element upper portions 6', 6' (for example, shoulder portions 8 described later) of 2 fastener elements 4', 4' of the opposite side to be engaged with each other, respectively; and an intermediate region 72 between the 2 placement regions 71. The area of the intermediate region 72 may be in the range of 0.5 to 1.5 times the total value of the areas of the 2 placement regions 71. The same applies to the fastener element 4'. When the fastener elements 4, 4 'are engaged, the intermediate regions 72, 72' thereof can be visually recognized (in plan view). At this time, the intermediate regions 72, 72' are located on the inner side between the element upper portions 6, 6' (and between their upper surfaces 61, 61 '), not significantly.
In some cases, including the illustrated example, the element lower portion 5 includes: a base 51 having a lower base end surface 54; a head 53 having a lower top end surface 55; and a neck 52 having a centrally tapered shape such that there is a minimum element width between the base 51 and the head 53. The head 53 includes 2 engaging portions 58 protruding to opposite sides in the belt longitudinal direction as at least one engaging portion 58 (see fig. 6). The neck 52 includes 2 engaged portions 59 recessed to form a middle tapered portion of the neck 52 as at least one engaged portion 59. The same applies to the element lower portion 5'.
The base 51 is formed to have substantially the same width as the element upper portions 6, 6'. That is, the width W51 of the base 51 is equal to the width W6 of the element upper portions 6, 6'. Therefore, the pitch Pi of the fastener element 4 can be determined based on the structure of the element lower portions 5, 5'. The length of the base portion 51 along the element center line CX is shorter than the length L6 of the element upper portions 6, 6'. The lower base end surfaces 54, 54 'are located on opposite sides of the upper base end surfaces 64, 64' of the element upper portions 6, 6 'across the fastener tapes 3, 3'. The base 51 has 2 side surfaces 512 and 513 provided so as to be orthogonal to the element width direction, and extends along the element center line CX so as to cross the core wire 33 (see fig. 8).
The neck 52 has a width W52 (see fig. 8) at which the element width is narrowest at the element lower portions 5, 5'. The head 53 has a width W53 having the largest element width at the element lower portions 5, 5' other than the base 51. The element lower portion 5, 5' has a width gradually decreasing to reach the width W52 as extending from the intermediate position of the base portion 51 and the neck portion 52 (i.e., the neck portion start position) toward the outside, and has a width gradually increasing to reach the width W53 after passing through the width W52. As a result, the neck portion 52 is formed to have a middle tapered portion, and each engaged portion 59 is formed to have a semi-cylindrical receiving space. The width of the head 53 gradually decreases from the width W53 to the outside of the belt. 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 element lower portions 5, 5'. The sides of the base 51, neck 52 and head 53 are joined to form a profile. As shown in fig. 5, the base portion 51 is fixed to the core thread 33 having a predetermined width between the positions P11 and P12 and a part of the fastener tape 3, 3' adjacent to the core thread 33.
The 2 engaging portions 58 may be separated by the element center line CX of the fastener element 4, and/or mirror-symmetrical with respect to the element center line CX (i.e., each becomes a semi-cylindrical portion), respectively. Similarly, the 2 engaged portions 59 may be separated by the element center line CX of the fastener element 4 and/or mirror-symmetrical with respect to the element center line CX (i.e., each becomes a portion having a semi-cylindrical receiving space).
The 2 engaged portions 59 are at least partially closed from above by the 2 shoulders 8 of the element upper portions 6, 6' (see fig. 6). The shoulder portions 8 are disposed on both sides of the neck portion 52 when the fastener element 4 is seen in the bottom view (see fig. 8). When the left and right fastener elements 4, 4' are engaged, the head 53 of the fastener element 4 on the left and right sides is inserted between the neck 52' of the fastener element 4' adjacent to the other side on the left and right sides, and is held. At this time, the head 53 is disposed immediately below the shoulder 8 'of the fastener element 4', and the upward direction thereof is restricted. That is, the shoulder portion of the fastener element 4 functions as a portion for restricting displacement of the fastener element 4' of the opposite side of engagement. Advantageously, the shoulder 8 also forms part of the block-shaped element upper part 6, 6', and does not have a shape (when the element upper part 6, 6' is viewed in plan) which can be distinguished as a shoulder.
The upper distal end surface 65 is located further outside the fastener tapes 3, 3' than the minimum element width W52 in the neck portion 52 in the direction along the element center line CX (see fig. 5 to 8). Thereby, the element upper portions 6, 6' can be formed longer and/or the shoulder portion 8 can be made to have a sufficient area. Additionally or alternatively, the upper tip surface 65 is located closer to the minimum element width W52 in the neck 52 than the lower tip surfaces 55, 55' or their extreme tip positions in the direction along the element center line CX. That is, the length L8 shown in fig. 8 is smaller than the length L9. In this case, the length L7 of the intermediate surfaces 7, 7' can be sufficiently ensured (see fig. 7). Further, by making the length L7 of the intermediate surfaces 7, 7 'longer, the stability at the time of engagement of the left and right fastener elements 4, 4' is improved.
The method of manufacturing the slide fastener 1 is clear to those skilled in the art based on the above description, and therefore omitted. The cavity shape of the injection molding die of the fastener element 4 is simplified because the shape of the element upper portions 6, 6' is relatively simple. The inclination of the side surfaces (for example, the front side surface 62 and the rear side surface 63) of the element upper portions 6, 6' acts as a draft angle of the fastener element 4 from the mold cavity. The gate position may be set at a position other than the molding cavity surface of the upper surfaces 61, 61' of the element upper portions 6, 6' (for example, at the lower tip end surfaces 55, 55 '). This ensures high flatness and/or smoothness of the upper surfaces 61, 61'. The lower tip surface 55, 55' may have gate marks. The cavity surface of the mold may also have a high smoothness so that the outer surface of the fastener element 4 has a high smoothness.
The gloss can also be improved by attaching a metal foil to the upper surfaces 61, 61'. In this case, the 1 st inclined region 61b and the 2 nd inclined region 61c can ensure reflection of light over a wider angle range. It should be noted that this applies equally well in the case where no metal foil is provided.
Based on the above teachings, one of ordinary skill in the art can apply to the various embodiments. Reference numerals are incorporated in the claims for reference only and are not intended to be used for the purpose of limiting the scope of the interpretation of the claims.

Claims (22)

1. A slide fastener, characterized in that the slide fastener (1) comprises:
a pair of right and left fastener stringers (2, 2 '), each fastener stringer (2, 2') including: a fastener tape (3, 3'); and a plurality of fastener elements (4, 4 '), the plurality of fastener elements (4, 4 ') being attached to side edge portions (31, 31 ') of the fastener tapes (3, 3 ') at predetermined intervals, each fastener element (4, 4 ') including a fastener element lower portion (5, 5 ') and a fastener element upper portion (6, 6 ') provided below and above a plane in which the fastener tapes (3, 3 ') are located, respectively, the fastener element lower portion (5, 5 ') having at least one engagement portion (58) and at least one engaged portion (59); and
a slider (9) which advances on the center line of the slide fastener (1) so as to cause each fastener element (4) included in one of the pair of right and left fastener stringers (2, 2 ') to be engaged with each fastener element (4 ') included in the other of the pair of right and left fastener stringers (2, 2 ') in a staggered manner, and retreats on the center line of the slide fastener (1) so as to release the engagement,
the element upper portion (6, 6 ') of each fastener element (4, 4') comprises a single elongate shaped portion comprising: an upper surface (61, 61') extending in a width direction of the slide fastener (1) orthogonal to a center line of the slide fastener (1); front side surfaces (62, 62') extending in the width direction of the slide fastener (1); and a rear side surface (63, 63') extending in the width direction of the slide fastener (1),
The slide fastener (1) is formed as follows: in a closed state of the slide fastener (1) in which each fastener element (4) included in one of the pair of right and left fastener stringers (2, 2 ') is engaged with each fastener element (4 ') included in the other of the pair of right and left fastener stringers (2, 2 '), the element upper portions (6, 6 ') of the fastener elements (4, 4 ') do not cross the center line of the slide fastener (1).
2. The zipper of claim 1, wherein:
the element upper portion (6, 6 ') of each fastener element (4, 4') further includes: a 1 st intermediate surface (66, 66 ') extending along the width direction of the slide fastener (1) between the upper surface (61, 61 ') and the front side surface (62, 62 '); and a 2 nd intermediate surface (67, 67 ') extending in the width direction of the slide fastener (1) between the upper surface (61, 61 ') and the rear side surface (63, 63 '), a 1 st boundary line (L1) being defined between the upper surface (61, 61 ') and the 1 st intermediate surface (66, 66 '), a 2 nd boundary line (L2) being defined between the upper surface (61, 61 ') and the 2 nd intermediate surface (67, 67 '),
in the closed state of the slide fastener (1), among front and rear fastener elements (E1, E2) which are provided on different fastener stringers (2, 2 ') of the pair of right and left fastener stringers (2, 2') and are engaged adjacently on a center line of the slide fastener (1), the front and rear fastener elements (E1, E2) include front fastener elements (E1) and rear fastener elements (E2), and the fastener element upper portions (6, 6 ') of the respective fastener elements (4, 4') are formed as: when a 1 st virtual line (DL 1) that is provided on at least the core lines (33, 33 ') provided on the side edge portions (31, 31') of the fastener tapes (3, 3 ') and that is in contact with the 1 st boundary line (L1) and that extends parallel to the width direction of the fastener (1), and a 2 nd virtual line (DL 2) that is provided on at least the core lines (33, 33') provided on the side edge portions (31, 31 ') of the fastener tapes (3, 3') and that is in contact with the 2 nd boundary line (L2) and that extends parallel to the width direction of the fastener (1), the 1 st virtual line (DL 1) of the rear fastener element (E2) and the 2 nd virtual line (DL 2) of the front fastener element (E1) extend so as not to intersect with each other with a gap therebetween are set.
3. The zipper of claim 2, wherein:
in the closed state of the slide fastener (1), the 2 nd virtual line (DL 2) of the front fastener element (E1) coincides with or extends so as to be close to a 3 rd boundary line (L3) between the front side surfaces (62, 62 ') and the 1 st intermediate surfaces (66, 66') of the rear fastener element (E2).
4. The zipper of claim 2, wherein:
in each of the front and rear fastener elements (E1, E2),
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 1 st virtual line (DL 1) and the 2 nd virtual line (DL 2) falls within a range determined based on a lower limit value obtained by multiplying a 1/2 value of the width (W6) of the element upper portion (6, 6 ') by 0.8 and an upper limit value obtained by multiplying the 1/2 value by 1.2, the width (W6) of the element upper portion (6, 6 ') being determined based on a lower side of the front side (62, 62 ') which is in contact with the fastener tape (3, 3 ') and extends in the width direction of the fastener (1) and a lower side of the rear side (63, 63 ') which is in contact with the fastener tape (3, 3 ') and extends in the width direction of the fastener (1).
5. The slide fastener according to any one of claims 2 to 4, wherein:
a3 rd boundary line (L3) between the front side surface (62, 62 ') and the 1 st intermediate surface (66, 66') is defined, a 4 th boundary line (L4) between the rear side surface (63) and the 2 nd intermediate surface (67, 67 ') is defined, and the 1 st to 4 th boundary lines (L1, L2, L3, L4) are oriented substantially parallel to each other so as to extend over at least the entire width of the core wire (33, 33') provided at the side edge portion (31, 31 ') of the fastener tape (3, 3').
6. The slide fastener according to any one of claims 2 to 4, wherein:
the gap is 1/3 or less of the distance between the 1 st virtual line (DL 1) and the 2 nd virtual line (DL 2) in one of the front and rear fastener elements (E1, E2).
7. The zipper of claim 6, wherein:
the gap is 1/5 or more of the distance between the 1 st virtual line (DL 1) and the 2 nd virtual line (DL 2).
8. The zipper of claim 1, wherein:
the element upper portion (6, 6 ') of each fastener element (4, 4') further includes: a 1 st intermediate surface (66, 66 ') extending along the width direction of the slide fastener (1) between the upper surface (61, 61 ') and the front side surface (62, 62 '); and a 2 nd intermediate surface (67, 67 ') extending in the width direction of the slide fastener (1) between the upper surface (61, 61 ') and the rear side surface (63, 63 '),
The 1 st intermediate surface (66, 66 ') is a curved surface which extends downward while being curved from a 1 st boundary line (L1) between the upper surface (61, 61 ') and the 1 st intermediate surface (66, 66 ') to a 3 rd boundary line (L3) between the 1 st intermediate surface (66, 66 ') and the front side surface (62, 62 '),
the 2 nd intermediate surface (67, 67 ') is a curved surface extending downward from a 2 nd boundary line (L2) between the upper surface (61, 61 ') and the 2 nd intermediate surface (67, 67 ') to a 4 th boundary line (L4) between the 2 nd intermediate surface (67, 67 ') and the rear side surface (63, 63 ') while being curved.
9. The slide fastener according to any one of claims 2 to 4, wherein:
the 1 st intermediate surface (66, 66 ') is a curved surface which extends downward while being curved from a 1 st boundary line (L1) between the upper surface (61, 61 ') and the 1 st intermediate surface (66, 66 ') to a 3 rd boundary line (L3) between the 1 st intermediate surface (66, 66 ') and the front side surface (62, 62 '),
the 2 nd intermediate surface (67, 67 ') is a curved surface extending downward from a 2 nd boundary line (L2) between the upper surface (61, 61 ') and the 2 nd intermediate surface (67, 67 ') to a 4 th boundary line (L4) between the 2 nd intermediate surface (67, 67 ') and the rear side surface (63, 63 ') while being curved.
10. The slide fastener according to any one of claims 1 to 4, wherein:
the fastener element upper portions (6, 6 ') of the fastener elements (4, 4') have widths that increase as they move away from the upper surfaces (61, 61 ') due to the inclination of the front side surfaces (62, 62') and the rear side surfaces (63).
11. The slide fastener according to any one of claims 1 to 4, wherein:
the front side surfaces (62, 62 ') and the rear side surfaces (63) form angles in the range of 75 DEG to 85 DEG with respect to the upper tape surfaces (36) of the fastener tapes (3, 3').
12. The slide fastener according to any one of claims 2 to 4, wherein:
in the closed state of the slide fastener (1), when the rear side face (63) of the front side fastener element (E1) and the rear side face (62 ') of the rear side fastener element (E2) among the front side and rear side fastener elements (E1, E2) are moved in parallel to a common plane along the width direction of the slide fastener (1), the rear side face (63) of the front side fastener element (E1) and the front side face (62') of the rear side fastener element (E2) form at least a part of an isosceles triangle having an acute angle in the apex angle.
13. The slide fastener according to any one of claims 1 to 4, wherein:
the element upper portion (6, 6 ') of each fastener element (4, 4') has: an upper base end surface (64, 64 ') located on a tape surface of the fastener tape (3, 3'); and an upper top end face (65, 65 ') located outside the tape face of the fastener tape (3, 3'),
in the closed state of the slide fastener (1), the upper tip end surfaces (65, 65 ') of the fastener elements (4) included in one of the pair of right and left fastener stringers (2, 2 ') and the upper tip end surfaces (65 ') of the fastener elements (4 ') included in the other of the pair of right and left fastener stringers (2, 2 ') are alternately arranged on both sides of a center line of the slide fastener (1).
14. The slide fastener according to any one of claims 2 to 4, wherein:
the element upper portion (6, 6 ') of each fastener element (4, 4') has: an upper base end surface (64, 64 ') located on a tape surface of the fastener tape (3, 3'); and an upper top end face (65, 65 ') located outside the tape face of the fastener tape (3, 3'),
in the closed state of the slide fastener (1), when the upper distal end face (65) of the front fastener element (E1) and the upper distal end face (65 ') of the rear fastener element (E2) of the front and rear fastener elements (E1, E2) are moved in parallel to a common plane along the center line of the slide fastener (1), the upper distal end face (65) of the front fastener element (E1) and the upper distal end face (65') of the rear fastener element (E2) form at least a part of an isosceles triangle having an acute angle as a vertex angle.
15. The slide fastener according to any one of claims 1 to 4, wherein:
the fastener elements (4, 4 ') have element center lines parallel to the width direction of the fastener (1), and the element upper portions (6, 6') and the element lower portions (5, 5 ') of the fastener elements (4, 4') are provided on the element center lines and are formed so as to be symmetrical with respect to the element center lines.
16. The slide fastener according to any one of claims 1 to 4, wherein:
the upper surface (61, 61 ') of the element upper portion (6, 6 ') of each fastener element (4, 4 ') has an elongated rectangular profile along an element center line parallel to the width direction of the fastener (1).
17. The slide fastener according to any one of claims 1 to 4, wherein:
the element upper part (6, 6 ') is a substantially rectangular parallelepiped part formed in an elongated shape between an upper base end surface (64, 64 ') and an upper tip end surface (65, 65 ') along an element center line parallel to the width direction of the slide fastener (1),
the element lower part (5) is formed in an elongated shape along the element center line between a lower base end surface (54) and a lower tip end surface (55).
18. The zipper of claim 17, wherein:
the element upper part (6, 6') further comprises: a 1 st intermediate surface (66, 66 ') extending along the width direction of the slide fastener (1) between the upper surface (61, 61 ') and the front side surface (62, 62 '); and a 2 nd intermediate surface (67, 67 ') extending in the width direction of the slide fastener (1) between the upper surface (61, 61 ') and the rear side surface (63, 63 '),
in each fastener stringer (2, 2 ') of the pair of right and left fastener stringers (2, 2 '), the upper distal end surfaces (65, 65 ') of the fastener element upper portions (6, 6 ') of the fastener elements (4, 4 ') are offset so as to be closer to the side edge portions (31, 31 ') of the fastener tapes (3, 3 ') than the lower distal end surfaces (55), and intermediate surfaces (7, 7 ') are formed between the lower distal end surfaces (55) and the upper distal end surfaces (65, 65 ').
19. The zipper of claim 18, wherein:
the upper tip face (65, 65 ') and the intermediate face (7, 7') form an angle equal to an angle in the range between 90 ° and 100 °.
20. The zipper of claim 18, wherein:
At least one condition of the following (i) and (ii) is satisfied:
(i) The width of the intermediate face (7, 7 ') gradually increases and then gradually decreases away from the upper tip face (65, 65') along the element centerline; and
(ii) The intermediate surface (7, 7 ') has a perfectly circular contour resulting from the cutting of an arc by the upper tip surface (65, 65').
21. The zipper of claim 17, wherein:
the element lower part (5) comprises: a base (51) having the lower base end surface (54); a head (53) having the lower top end surface (55); and a neck (52) of a centrally tapered shape such that there is a minimum element width between the base (51) and the head (53),
in each fastener stringer (2, 2 ') of the pair of right and left fastener stringers (2, 2'), the upper tip end surface (65, 65 ') is located further outside the fastener tape (3, 3') than the position of the minimum element width in the neck portion (52) along the element center line; and/or
In each fastener element (4, 4 ') of each fastener element chain (2, 2') of the pair of fastener element chains (2, 2 '), the upper tip end surface (65, 65') is located closer to the minimum element width in the neck portion (52) than the lower tip end surface (55) or the most tip end position of the lower tip end surface (55) in the direction along the element center line.
22. The slide fastener according to any one of claims 1 to 4, wherein:
the fastener element upper parts (6, 6 ') of the fastener elements (4, 4') are provided with: an upper base end surface (64, 64 ') located on a tape surface of the fastener tape (3, 3'); and an upper tip face (65, 65 ') located on the opposite side of the upper base end face (64, 64'),
the upper surface (61, 61') of the element upper portion (6) comprises a total of 3 areas: a main region (61 a); a 1 st inclined region (61 b) that is inclined gradually at a 1 st predetermined angle between the main region (61 a) and the upper end of the upper base end surface (64); and a 2 nd inclination region (61 c) which is inclined gradually at a 2 nd prescribed angle between the main region (61 a) and the upper ends of the upper tip surfaces (65, 65').
CN202321335939.4U 2022-11-04 2023-05-30 Zipper fastener Active CN220236213U (en)

Applications Claiming Priority (2)

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JPPCT/JP2022/041244 2022-11-04
PCT/JP2022/041244 WO2024095482A1 (en) 2022-11-04 2022-11-04 Slide fastener

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CN202321335939.4U Active CN220236213U (en) 2022-11-04 2023-05-30 Zipper fastener
CN202310620911.3A Pending CN117981952A (en) 2022-11-04 2023-05-30 Zipper fastener

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112014006983B4 (en) * 2014-09-24 2022-01-27 Ykk Corporation Link, zipper chain and zipper closure
CN110087502B (en) * 2016-12-26 2021-11-23 Ykk株式会社 Slide fastener
EP3791747B1 (en) * 2018-05-10 2023-08-30 YKK Corporation Fastener stringer

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