Zipper and zipper comprising the same

Abstract

A slider and a zipper including the slider are provided. First and second guide portions (6, 7) of a slider (9) include first and second chain guide surfaces (65, 75) that face each other in a width direction of a slider main portion (4). The first and second chain guide surfaces have shapes suitable for guiding a chain element of a slider chain based on a single wire. A second wing plate (42) of the slider has a shift edge (21) that is shifted toward a center line (CL) in the width direction of the slider main portion compared to a farthest position (11f) of a first side edge (11) that is farthest from the center line (CL). The shift edge (21) extends between a front edge (23) of the second wing plate (42) and a rear edge (24) of the second wing plate (42). A connection point (P1) of the shift edge (21) to the front edge (23) of the second wing plate (42) is located forward in a direction parallel to the center line (CL) compared to a front end of the first chain guide surface (65).

Description

Technical Field

[0001] This utility model relates to a zipper pull and a zipper including the zipper pull. Background Technology

[0002] International Publication No. 2010 / 113275 (hereinafter referred to as Document 1) discloses a technique for forcibly disengaging the left and right zipper teeth without operating the zipper pull (refer to this document). Figures 7 to 10 To achieve this, at least one of the upper and lower flanges of the slider is flexed. Furthermore, the flange height is lowered in the portion of the slider near the shoulder (see the relevant document). Figures 11 to 16 Furthermore, regarding the types of zipper teeth, only the block-shaped zipper teeth made of resin and metal were studied (see paragraph 0084 of the last paragraph of the specification in this document).

[0003] Chinese Patent No. 109198809 (hereinafter referred to as Document 2) discloses a method of forming a notch in the lower wing plate to facilitate the disengagement of zipper teeth.

[0004] Chinese Utility Model No. 219742019 (hereinafter referred to as Document 3) discloses a zipper head structure that can eliminate the trapping of fabric into the zipper head, especially in that the lower wing plate is formed into a narrow shape. Utility Model Content

[0005] In the form where the zipper teeth are fixed to a resin block on the side edge of the zipper tape, the zipper teeth themselves possess sufficient rigidity and are not easily deformed. Utilizing this inherent rigidity, in Reference 1, the upper or lower flange, which is configured as a cantilever beam relative to the connecting post, is flexed. Reference 2, similarly to Reference 1, relates to a form where the zipper teeth are configured as resin blocks.

[0006] When using coil-like components with locking heads formed at specified intervals by winding monofilaments into a spiral shape as zipper teeth, the individual zipper teeth may not possess sufficient rigidity, a premise not shared with Documents 1 and 2. Specifically, compared to resin blocks, the zipper teeth corresponding to one turn of the spiral coil-like component have lower rigidity and are more prone to deformation. Therefore, it is considered that the methods disclosed in Documents 1 and 2 cannot be used unchanged for zipper teeth based on monofilaments, or at least are unsuitable. The inventors of this application, defying common technical knowledge, conceived the following utility model.

[0007] One embodiment of the present invention includes: a main part of the slider, comprising a first wing plate, a second wing plate, and a connecting post connecting the first wing plate and the second wing plate; a chain tooth passage branching through the connecting post is defined in the main part of the slider, the chain tooth passage comprising left and right front openings located on both sides of the connecting post and a rear opening located behind the connecting post and spatially communicating with the left and right front openings; and a first guide portion and a second guide portion, which are spaced apart in the width direction of the main part of the slider such that the chain tooth passage has a portion whose width gradually decreases towards the rear; the first guide portion is connected to the first wing plate along the first side edge of the first wing plate on the left and right sides, and the second guide portion is connected to the first wing plate along the second side edge of the first wing plate on the other side. The first and second guide portions include a first tooth guide surface and a second tooth guide surface facing each other in the width direction of the main part of the zipper pull. The first and second tooth guide surfaces have shapes suitable for guiding zipper teeth based on a single filament. The second wing plate has an offset edge that is offset towards the center line in the width direction of the main part of the zipper pull, compared to the furthest position of the first side edge furthest from the center line in the width direction. The center line extends linearly in the front-rear direction at the center of the connecting post in the width direction. The offset edge extends between the front and rear edges of the second wing plate, and the connection point of the offset edge towards the front edge of the second wing plate is located forward of the front end of the first tooth guide surface in a direction parallel to the center line.

[0008] One embodiment of the zipper of this invention includes a pair of left and right coil-shaped members with a monofilament wound into a spiral shape, a pair of left and right zipper tapes supporting the pair of coil-shaped members, and the aforementioned zipper pull. The left and right coil-shaped members have multiple engaging heads at positions protruding from opposite edges of the left and right zipper tapes. The zipper pull is installed in such a way that one coil-shaped member of the left and right zipper tapes cannot detach, while the other coil-shaped member of the left and right zipper tapes can disengage from the zipper pull via the space between the offset edge of the zipper pull and the first guide portion.

[0009] The features described in the claims can be applied independently or in any combination to the various ways of the zipper pulls and zippers described above.

[0010] Utility Model Effect

[0011] According to one aspect of this invention, in a method of forcibly disengaging the zipper teeth based on a single filament without performing a zipper pull operation, the lifespan of the zipper pull and / or zipper teeth can be extended. Attached Figure Description

[0012] Figure 1 This is a top view of one embodiment of the zipper of this utility model.

[0013] Figure 2 This is a perspective view of the pull head of one embodiment of the present invention, viewed from the left front, with particular depiction of the inner surfaces of the first guide portion and the second guide portion connected to the first wing plate.

[0014] Figure 3 This is the front view of the pull head.

[0015] Figure 4 This is the right view of the pull tab.

[0016] Figure 5A This is a top-down view of the zipper pull.

[0017] Figure 5B This is a diagram showing the pull head from below.

[0018] Figure 6A This is a schematic horizontal sectional view of the pull head, showing the first wing plate and the first guide portion and the second guide portion protruding from the inner surface of the first wing plate.

[0019] Figure 6B This is a schematic horizontal sectional view of the puller head, showing the second wing and a third guide portion protruding from the inner surface of the second wing. A hypothetical mirror image of the opposite edges with respect to the centerline of the puller head is also shown.

[0020] Figure 7 This is a schematic diagram showing the state in which the left and right coil-shaped components meet at the rear of the connecting column, depicted from the perspective of the second wing plate when viewing the first wing plate.

[0021] Figure 8 Is with Figure 7 The same schematic diagram is drawn from the perspective of viewing the second wing from the first wing, and therefore the left and right zipper straps are also shown.

[0022] Figure 9 This is a schematic diagram showing the left and right coil-shaped components that have been released from engagement without the pull-head operation.

[0023] Figure 10 This is a schematic cross-sectional view of a zipper, showing the back surface of the zipper pull.

[0024] Figure 11 This is a schematic cross-sectional view of a zipper. Figure 1 The image extracted from the single-dotted dashed line X11-X11. Shown as a dashed line. Figure 12 The partial outline of the first guide section is provided for reference.

[0025] Figure 12 This is a schematic cross-sectional view of a zipper, which is related to... Figure 11 Compared to those in front Figure 1The diagram shows the single-dotted line X12-X12 being removed. It schematically illustrates the situation where the zipper teeth on the right side have detached from the zipper pull for reference.

[0026] Figure 13 This is a schematic diagram of a hypothetical guide section, shown as a mirror image of the second guide section, with dashed lines.

[0027] Figure 14 This is a schematic diagram showing the positional relationship between the rear region of the detached surface and the imaginary guide section.

[0028] Figure 15 This is a schematic diagram showing the positional relationship between the front region of the detachment surface and the imaginary guide section.

[0029] Figure 16 This is a schematic diagram showing the center plane of the chain teeth.

[0030] Explanation of reference numerals in the attached figures

[0031] 4: Main parts of the zipper pull

[0032] 5: Chain tooth passage

[0033] 6: First Guiding Section

[0034] 7: Second Guiding Section

[0035] 8: Third Guiding Section

[0036] 9: Pull the screwdriver

[0037] 11a, 12a: Coil-shaped components

[0038] 11b, 12b: Zipper tape

[0039] 11f: Farthest position

[0040] 11s, 12s: Zipper teeth and straps

[0041] 22: Opposite edge

[0042] 22m: Mirror line

[0043] 22n: Specified part

[0044] 41: First Wing Plate

[0045] 42: Second Wing

[0046] 43: Connecting Post

[0047] 65: First chain tooth guide surface

[0048] 65j: End edge

[0049] 66: Detached surface

[0050] 75: Second chain tooth guide surface

[0051] 150: Zipper

[0052] CL: Centerline

[0053] P1: Connection point Detailed Implementation

[0054] Hereinafter, various embodiments and features will be described with reference to the accompanying drawings. Those skilled in the art will be able to combine the various embodiments and / or features without excessive explanation, and will also understand the synergistic effects resulting from such combinations. Repeated descriptions between embodiments are generally omitted. The accompanying drawings are primarily for the purpose of describing the utility model, and simplifications have been made for ease of drawing. The features are not only applicable to the zipper pulls and zippers illustrated in this application, but are also understood to be general features applicable to other zipper pulls and zippers not illustrated in this specification.

[0055] In this instruction manual, the width, length, and thickness directions of the zipper are sometimes described in relation to the left-right, front-back, and up-down directions. The same applies to the width, length, and thickness directions of the zipper pull (or its main body). The up-down direction does not need to coincide with the vertical direction (direction of gravity); it is irrelevant.

[0056] In this specification, the center line CL of the zipper pull is specified. The center line CL extends linearly in the front-to-back direction from the center of the connecting post of the zipper pull in the width direction. The center line CL typically coincides with or is included in the center line of the zipper. Furthermore, the center line of the zipper extends in the front-to-back direction from the center of the zipper in the width direction.

[0057] Reference Figures 1 to 6B The structure and function of zipper 150 and zipper pull 9 are explained. Figure 1 This is a top view of Zipper 150. Figure 2 This is a perspective view taken from the left front of the pull head 9, especially depicting the inner surfaces of the first guide section 6 and the second guide section 7 connected to the first wing plate 41. Figure 3 This is the front view of pull head 9. Figure 4 This is the right view of pull head 9. Figure 5A This is a top-view diagram of the 9th pull head. Figure 5B This is a bottom-view diagram of the 9th generation of the tractor. Figure 6A This is a schematic horizontal cross-sectional view of the pull head 9, showing the first wing plate 41 and the first guide portion 6 and the second guide portion 7 protruding from the inner surface of the first wing plate 41. Figure 6B This is a schematic horizontal sectional view of the pull head 9, showing the second wing plate 42 and the third guide portion 8 protruding from the inner surface of the second wing plate 42. A hypothetical mirror image of the opposite edges with respect to the centerline CL is also shown.

[0058] like Figure 1 As shown, the zipper 150 has a pair of left and right zipper teeth 11s and 12s and a zipper pull 9. The left and right zipper teeth 11s and 12s each include coil-shaped members 11a and 12a and zipper strips 11b and 12b supporting the coil-shaped members 11a and 12a (typically, the coil-shaped members 11a and 12a are sewn together). The left and right zipper teeth 11s and 12s are closed by the forward movement of the zipper pull 9 (the zipper teeth of the coil-shaped members 11a and 12a are interlocked). The left and right zipper teeth 11s and 12s are opened by the retraction of the zipper pull 9 (similarly, the zipper teeth of the coil-shaped members 11a and 12a are disengaged).

[0059] Each coil-shaped component 11a and 12a is formed by winding a monofilament into a spiral shape and forming an engaging head at a predetermined interval. Each coil-shaped component 11a and 12a includes an arrangement of zipper teeth corresponding to one turn of the spiral body of the monofilament. Specifically, the zipper teeth have an engaging head 2a, a reversing part 2b, an upper leg 2c, and a lower leg 2d (see reference). Figure 1 , Figure 12 The engaging head 2a is located outside the surface of the zipper tape, specifically, at a position protruding from the opposite edges of the zipper tapes 11b and 12b. The engaging head 2a is formed by shaping a defined portion of a monofilament into a wide width along the long side of the zipper tape 11b. The reversing portion 2b is located on the surface of the zipper tape. Furthermore, the surface of the zipper tape is the upper or lower surface that defines its thickness. The upper leg 2c is located further away from the surface of the zipper tape than the lower leg 2d. The upper leg 2c and the lower leg 2d can also be alternatively referred to as the first leg and the second leg.

[0060] The zipper pull 9 is installed in such a way that the coil-shaped member (12a in the illustrated case) of one of the left and right zipper tooth strips 11s and 12s (the left zipper tooth strip 12s in the illustrated example) cannot detach, while the coil-shaped member (11a in the illustrated case) of the other of the left and right zipper tooth strips 11s and 12s (the right zipper tooth strip 11s in the illustrated example) can be disengaged from the zipper pull 9 (via the space between the offset edge 21 and the first guide portion 6, described later). Compared with zipper teeth made of resin blocks, zipper teeth based on monofilaments have lower rigidity and are more prone to deformation. If deformation accumulates in the zipper teeth, it may hinder the normal opening and closing of the zipper. According to one or more features described later in this invention, such problems can be alleviated or eliminated.

[0061] In some cases, front stops 16 and 17 are provided adjacent to the front ends of the coil-shaped members 11a and 12a on the zipper tooth tapes 11s and 12s. Separable rear stops 18 are provided adjacent to the rear ends of the coil-shaped members 11a and 12a. The separable rear stop 18 has a pusher 18a and a socket portion 18b, the pusher 18a being insertable and removable relative to the receiving groove of the socket portion 18b. Advantageously, the pusher 18a is provided on the zipper tooth tape 12s.

[0062] The slider 9 is made of resin or metal and is manufactured through injection molding or die casting. For example... Figures 2 to 4 As shown, the slider 9 has a main slider portion 4, a first guide portion 6, a second guide portion 7, a third guide portion 8, and a slider mounting portion 19. The main slider portion 4 includes a first wing plate 41, a second wing plate 42, and a connecting post 43 connecting the first wing plate 41 and the second wing plate 42. In some embodiments, the first guide portion 6 and the second guide portion 7 are integrally provided with the main slider portion 4. In other embodiments, the first guide portion 6 and the second guide portion 7 are separate from the main slider portion 4 and are mounted relative to it. The first wing plate 41 and the second wing plate 42 can also be alternatively referred to as the upper wing plate and the lower wing plate.

[0063] The first wing plate 41 and the second wing plate 42 are opposite each other in the vertical direction (the height direction of the slider 9 or the extension direction of the connecting column 43). Like the wing plates of a typical slider, the first wing plate 41 and the second wing plate 42 are flat plates, each having an inner surface and an outer surface in its thickness direction. The inner surfaces of the first wing plate 41 and the second wing plate 42 are arranged opposite each other, and the outer surfaces of the first wing plate 41 and the second wing plate 42 face opposite directions.

[0064] A pull tab mounting portion 19 is disposed on the outer surface of the first wing plate 41. A pull tab (not shown) is mounted relative to the pull tab mounting portion 19. By operating the pull tab, the locking claw (not shown) is released from engagement with the zipper teeth, thereby allowing the zipper pull 9 to move forward or backward. To achieve this purpose, a slit SL1 (see reference 43) is formed at the rear of the connecting post 43, through which the first wing plate 41 passes. Figure 2 ).

[0065] The axis L1 extending from the center of the pull tab mounting section 19 in the width direction along the front-back direction (refer to...) Figure 1 The zipper pull 9 is offset from the center line CL in the width direction. This facilitates the selective engagement of the locking claw with respect to the zipper teeth of the coil-shaped member 12a rather than the coil-shaped member 11a. The slit SL1 can also be positioned offset from the center line CL in the same direction as the axis L1. For safety's sake, the zipper pull 9 can also be a free zipper pull without the locking claw.

[0066] Optionally, the outer surface of the first wing plate 41 includes an inclined surface 45 whose thickness gradually decreases as it extends away from the centerline CL. This allows the first wing plate 41 to bend easily, facilitating the easy disengagement of the coil-shaped member 11a from the pull head 9. The inclined surface 45 approaches the inner surface of the first wing plate 41 as it moves away from the centerline CL. Suitablely, the inclined surface 45 is selectively provided only on one side of the centerline CL, the same side as the first guide portion 6. This makes it difficult for the first wing plate 41 to bend on the side the same as the second guide portion 7. Typically, the first wing plate 41 has a fixed thickness on the side the same as the second guide portion 7.

[0067] The main part 4 of the slider is defined by a chain tooth passage 5 that branches off from the connecting post 43. The chain tooth passage 5 includes left and right front openings 5m and 5n located on either side of the connecting post 43, and a rear opening 5r located behind the connecting post 43 and spatially connected to the left and right front openings 5m and 5n (see reference). Figure 5A The chain tooth passage 5 has passage widths W5a and W5b in the width direction of the main part 4 of the slider, which are limited by the first guide 6 and the second guide 7 (see reference). Figure 6A The result is a roughly Y-shaped passage. The chain tooth passage 5 has a passage width that widens as it moves away from the first wing plate 41 (W5a < W5b). This may be a result of the bending of the first chain tooth guide surface 65 and the second chain tooth guide surface 75, which will be described later.

[0068] like Figure 5A , Figure 5B As shown, the first wing 41 and the second wing 42 have different profiles (in the front view). The second wing 42 differs from the wing of a typical swivel head in that it is asymmetrical about the centerline CL (see 5B). Alternatively, the first wing 41 may also differ from the wing of a typical swivel head in that it is asymmetrical about the centerline CL (see 5A).

[0069] The first wing plate 41 has a first side edge 11, a second side edge 12, a leading edge 13, and a trailing edge 14 (see reference). Figure 5A The first side edge 11 and the second side edge 12 are formed symmetrically about the center line CL, and are one of the left and right edges in the width direction of the main part 4 of the slider, respectively. The first side edge 11 and the second side edge 12 have a rear portion that extends parallel to the center line CL, and a front portion that slopes away from the center line CL as it extends forward (suitably, with a gradually increasing slope relative to an imaginary line parallel to the center line CL).

[0070] The leading edge 13 extends in a manner that connects the front ends of both the first side edge 11 and the second side edge 12 relative to the front end of the connecting post 43. While not necessarily limited to this, it is asymmetrically formed about the center line CL, as shown in the example figure. That is, optionally, the leading edge 13 of the first wing plate 41 has a rearwardly recessed notch 15 on one side of the connecting post 43, thereby facilitating a quicker or easier separation of the zipper teeth 12s from the zipper pull 9. Of course, the notch 15 can also be omitted, and the leading edge 13 can be formed symmetrically on both sides of the connecting post 43.

[0071] The second wing plate 42 has an offset edge 21, a counter-edge 22, a leading edge 23, and a trailing edge 24 (see reference). Figure 5B Offset edge 21 and opposite edge 22 are one of the left and right edges in the width direction of the main part 4 of the slider. Offset edge 21 and opposite edge 22 are formed asymmetrically about the center line CL. Offset edge 21 extends longer in the front-to-back direction than opposite edge 22. In the example shown, offset edge 21 extends parallel to the center line CL, but it can be inclined relative to the center line CL, or it can extend in a wavy shape in the front-to-back direction. Opposite edge 22 is formed symmetrically with the second side edge 12, having the same rear and front portions as the second side edge 12. Front edge 23 is formed symmetrically with front edge 13 except that it is narrower due to offset edge 21 and has no notch 15. Rear edge 24 is formed symmetrically with rear edge 14 except that it is narrower due to offset edge 21.

[0072] The first guide section 6 and the second guide section 7 are arranged spaced apart in the width direction of the main part 4 of the zipper pull, such that the width of the chain tooth passage 5 gradually decreases towards the rear (see reference). Figure 2 , Figure 3 , Figure 6A The first guide section 6 is a track section connected to the first wing plate 41 along the first side edge 11 on one side. Preferably, it extends along the first side edge 11 and protrudes towards the second wing plate 42. The second guide section 7 is a track section connected to the first wing plate 41 along the second side edge 12 on the other side. Preferably, it extends along the second side edge 12 and protrudes towards the second wing plate 42. Furthermore, the first guide section 6 and the second guide section 7 can also be conceived as being divided into multiple parts in the front-rear direction, as long as their guiding performance is maintained.

[0073] The first guide portion 6 has a front portion 61 extending obliquely forward away from the center line CL, and a rear portion 62 located behind the front portion 61 and extending parallel to a plane (e.g., the center line CL) orthogonal to the width direction relative to the main portion 4 of the slider (see reference). Figure 6ASimilarly, the second guide portion 7 has a front portion 71 extending obliquely forward away from the center line CL, and a rear portion 72 located behind the front portion 71 and extending parallel to the center line CL. Similarly, the third guide portion 8 has a front portion 81 extending obliquely forward away from the center line CL, and a rear portion 82 located behind the front portion 81 and extending parallel to the center line CL (see reference). Figure 6B ).

[0074] The first guide section 6 has a front surface 6a, a rear surface 6e, an inner surface 6b, an outer surface 6c, and an end surface 6d on the opposite side facing the first wing plate 41 (see reference). Figure 6A The end face 6d connects the inner side 6b and the outer side 6c at a position separated from the first wing plate 41. The first guide portion 6 is able (e.g., as a result of or independent of the release surface 66 described later) to have a width that gradually decreases as it extends forward, at least at its front portion 61. At least one of the inner side 6b and the outer side 6c approaches the other side as it extends forward, thereby reducing the width of the first guide portion 6.

[0075] The first guide portion 6 may have at least its front portion 61 a thickness (height) that gradually decreases as it extends forward (see reference). Figure 4 As the end face 6d extends forward, it approaches the first wing plate 41, thereby reducing the thickness (height) of the first guide portion 6. Figure 4 As shown, the end face 6d can have a flat surface 6d1 disposed on a plane orthogonal to the vertical direction and an inclined surface 6d2 located in front of it. The angle (acute angle) formed by the inclined surface 6d2 with respect to the plane containing the flat surface 6d1 is in the range of 20° to 60°, thereby effectively balancing the lateral tensile strength of the zipper 150 and the ease with which the coiled member 11a can be disengaged from the zipper head 9.

[0076] The second guide section 7 has a front surface 7a, a rear surface 7e, an inner surface 7b, an outer surface 7c, and an end surface 7d on the opposite side facing the first wing plate 41 (see reference). Figure 6A The end face 7d connects the inner side 7b and the outer side 7c at a position where it separates from the first wing plate 41, and extends at a fixed height in the vertical direction along the front-rear direction. Therefore, the second guide portion 7 has a fixed thickness (height) in the vertical direction. The inner side 7b and the outer side 7c run parallel forward and define the width of the second guide portion 7. Furthermore, the width and thickness of the second guide portion 7 can be understood excluding the chamfer formed on the second guide portion 7. For example, if an R-shaped chamfer is performed between the front surface 7a and the end face 7d, the resulting reduction in the thickness of the second guide portion 7 can be excluded, and the second guide portion 7 can be understood as being formed with a fixed thickness.

[0077] The third guide section 8 forms a through slot G1 between itself and the second guide section 7 (see reference). Figure 3 Typically, the height of the third guide portion 8 is lower than that of the second guide portion 7. The third guide portion 8 narrows the gap between the second wing plate 42 and the second guide portion 7 to prevent the coil-shaped member 12a from disengaging from the zipper pull 9. Unlike the second guide portion 7, the third guide portion 8 does not directly contact the coil-shaped member 12a, but directly contacts the zipper tape 12b. The third guide portion 8 has the same structure as the second guide portion 7, specifically having a front surface 8a, a rear surface 8e, an inner surface 8b, an outer surface 8c, and an end face 8d that connects the inner surface 8b and the outer surface 8c at a position separated from the second wing plate 42 (see reference). Figure 6B ).

[0078] The first guide portion 6 and the second guide portion 7 (especially their inner surfaces 6b and 7b) are contained in the width direction of the main part 4 of the slider, which are mutually opposed to the first chain tooth guide surface 65 and the second chain tooth guide surface 75 (see reference). Figure 2 , Figure 3 , Figure 5B , Figure 6A The first tooth guide surface 65 and the second tooth guide surface 75 each have a shape suitable for guiding zipper teeth (specifically, coil-shaped members 11a and 12a) based on a monofilament (e.g., a shape suitable for the contour of the reversing portion of the zipper tooth). Typically, the first tooth guide surface 65 and the second tooth guide surface 75 include curved surfaces that bend away from each other as they extend toward the second wing plate 42. The spacing between the first tooth guide surface 65 and the second tooth guide surface 75 gradually increases as they move away from the first wing plate 41 (see reference). Figure 6A (W5a, W5b).

[0079] In detail, the first tooth guide surface 65 and the second tooth guide surface 75 are formed in such a way that they are bent to suit the contours of the reversing portions 2b of the multiple zipper teeth in the zipper head 9 of the coil-shaped members 11a and 12a, which are formed by winding monofilaments into a spiral, so that they can contact or press these reversing portions 2b (see reference). Figure 7 Typically, the first tooth guide surface 65 and the second tooth guide surface 75 are formed rearward compared to the connecting post 43. The first tooth guide surface 65 and the second tooth guide surface 75 can have a height approximately half the height of the reversing portion 2b in a direction parallel to the height direction of the main part 4 of the slider (e.g., the vertical direction) (see reference). Figure 10 ).

[0080] By providing the aforementioned first chain tooth guide surface 65 and second chain tooth guide surface 75 in the first guide portion 6 and the second guide portion 7, the coil-shaped members 11a and 12a can be more properly held within the slider 9. However, this, in turn, may reduce the ease with which the coil-shaped member 11a can detach from the slider 9. According to one or more features described later in this invention, such problems can be alleviated or eliminated.

[0081] In some cases, the first tooth guide surface 65 and the second tooth guide surface 75 are located offset from the inner surface of the first wing plate 41 towards the second wing plate 42. This suppresses the sliding of the coil-shaped members 11a and 12a on the inner surface of the first wing plate 41, thus reducing their wear. Furthermore, during the forward or backward movement of the slider 9, the coil-shaped members 11a and 12a do not need to always be in contact with the first tooth guide surface 65 and the second tooth guide surface 75; depending on the pulling method of the slider 9, they may not be in contact partially or entirely. In the example shown, the inner surface 6b includes the first side surface 63, the first tooth guide surface 65, and the second side surface 67. Similarly, the inner surface 7b includes the first side surface 64, the second tooth guide surface 75, and the second side surface 68. The first side surface can be a downwardly extending surface that is substantially perpendicular (parallel to the height direction of the slider 9) between the tooth guide surface and the inner surface of the first wing plate 41. A separation surface 66 (front region 66m, rear region 66n), described later, is formed between the second side surface 67 and the end face 6d. An edge 7z is formed between the second side surface 68 and the end face 7d. The angle is approximately perpendicular and includes a range of ±15° relative to the vertical direction.

[0082] The first tooth guide surface 65 is formed on both sides of the first guide portion 6, at least spanning the boundary between the front portion 61 and the rear portion 62. Preferably, it is formed along the entire or substantially the entire length of the first guide portion 6 in the front-rear direction. Similarly, the second tooth guide surface 75 is formed on both sides of the second guide portion 7, at least spanning the boundary between the front portion 71 and the rear portion 72. Preferably, it is formed along the entire or substantially the entire length of the second guide portion 7 in the front-rear direction. Of course, it is also possible to selectively form the first tooth guide surface 65 at the rear portion 62 and not at the front portion 61. The same applies to the second tooth guide surface 75. The second tooth guide surface 75 can terminate at a position further forward than the first tooth guide surface 65 (see reference). Figure 6A The interval D1). This facilitates the disengagement of the coil-shaped member 11a from the pull head 9 and makes it more difficult for the coil-shaped member 12a to disengage from the pull head 9.

[0083] Since the third guide portion 8 does not contact the coil-shaped member 12a, it may not have a tooth guide surface. The inner surface 8b of the third guide portion 8 can be formed substantially perpendicular to the inner surface of the second wing plate 42.

[0084] In this embodiment, the second wing plate 42 has an offset edge 21, which is located at the farthest position 11f of the first side edge 11 that is furthest from the centerline CL that extends linearly in the front-rear direction from the center of the connecting post 43 in the width direction of the main part 4 of the pull head (refer to...). Figure 5A The offset edge 21 is offset towards the centerline CL in the width direction of the main part 4 of the pull head. The offset edge 21 extends between the leading edge 23 and the trailing edge 24 of the second wing plate 42, and the offset edge 21 extends towards the connection point P1 of the leading edge 23 of the second wing plate 42 (refer to...). Figure 5A The offset edge 21 is located in front of the front end of the first tooth guide surface 65 (or, alternatively, the front end of the first guide portion 6, the rear end of the connecting post 43, or the center position of the connecting post 43 in the front-rear direction) in a direction parallel to the center line CL. If the offset edge 21 is made longer in this way, there is a concern that the support performance of the second wing plate 42 on the coil-shaped member 11a at the front opening 5m of the tooth passage 5 will decrease. However, the coil-shaped member 11a is supported between the first tooth guide surface 65 and the second wing plate 42. In addition, the posture of the coil-shaped member 11a is stabilized by engaging with the coil-shaped member 12a supported between the second tooth guide surface 75 and the second wing plate 42. Therefore, even if the offset edge 21 is made longer, the basic performance of the zipper pull 9 (and consequently the basic performance of the zipper 150) will not be significantly affected. Nevertheless, a zipper pull is provided that reduces the sliding resistance and deformation of the coil-shaped member 11a required when disengaging from the zipper pull 9, and adequately satisfies the purpose or use of forcibly disengaging the zipper teeth of the coil-shaped members 11a and 12a from each other. Specifically, for this purpose or use, the lifespan of the zipper pull (or the zipper teeth of the coil-shaped member) is extended.

[0085] The second wing plate 42 has a reverse edge 22 located on the side opposite to the offset edge 21 in the width direction of the main portion 4 of the slider. The reverse edge 22 can be formed symmetrically with the second side edge 12 of the first wing plate 41 (with respect to a plane orthogonal to the connecting post 43). As a result, the slider 9 is more securely mounted relative to the coil-shaped member 12a, effectively preventing the slider 9 from falling off the coil-shaped member 12a (and vice versa). At the same time, it becomes smoother or facilitates the disengagement of the coil-shaped member 11a from the chain tooth passage 5 via the space between the first guide portion 6 and the offset edge 21. This is because it prevents the slider 9 from being driven in the same direction by the coil-shaped member 11a.

[0086] Preferably, the offset edge 21 extends linearly between the leading edge 23 and the trailing edge 24 of the second wing plate 42. This uniformizes the force applied to the coil-shaped member 11a when disengaging from the pull head 9. The extending direction of the offset edge 21 can be parallel to the extending direction of the rear portion 82 of the third guide portion 8. However, this is not a limitation; the offset edge 21 can also be formed obliquely or in a wavy shape as described above. Furthermore, typically, the offset edge 21 has a predetermined width in the vertical direction.

[0087] The closer the offset edge 21 is to the centerline CL, the easier it is for the coil-shaped member 11a to disengage from the pull head 9. However, at the same time, the support performance of the second wing plate 42 for the coil-shaped member 11a will decrease. In some cases, satisfying one or more of the following conditions (a)-(d) ensures a balance between the two.

[0088] (a) When viewed from the front, the outer surface of the second wing plate 42 overlaps at least partially with the first guide portion 6, specifically, it is located directly above or directly below the first guide portion 6 (see reference). Figure 5B ).

[0089] (b) When the offset edge 21 is hypothetically set as a mirror image 22m of the center line CL, and the portion of the mirror image 22m extending in a plane orthogonal to the width direction of the main part of the slider 4 is set as a predetermined portion 22n, the offset edge 21 is located in the width direction of the main part of the slider 4 closer to the predetermined portion 22n than the center line CL (see reference). Figure 6B ).

[0090] (c) The offset edge 21 is located on an imaginary axis L9 parallel to the front-rear direction, or the offset edge 21 is located in the width direction of the main part 4 of the slider, offset from the center line CL towards the imaginary axis L9, wherein the imaginary axis L9 includes an imaginary line that is mirror-symmetrical about the center line CL and the inner surface of the rear part 82 of the third guide part 8 (see reference). Figure 6B ).

[0091] (d) The distance W2 between the centerline CL and the offset edge 21 is less than the distance W1 between the portion of the opposite edge 22 extending parallel to the centerline CL and the centerline CL, and is more than 3 / 5 of the distance W1. That is, (W1 * 3 / 5) ≤ W2 < W1 (refer to...) Figure 6B In addition, in Figure 6B The diagram also shows the distances W1' and W2' that are equal to W1 and W2, respectively, for reference.

[0092] In some cases, the inner surface of the second wing plate 42 may have an inclined surface 29 (see reference) that is inclined in the width direction of the main part 4 of the pull head in a manner that moves away from the first wing plate 41 as it moves away from the connecting post 43. Figure 2 , Figure 3 This facilitates the easy disengagement of the coil-shaped member 11a from the pull head 9. Preferably, the inclined surface 29 is a flat surface inclined at a certain angle. Advantageously, the inclined surface 29 is inclined to reach the offset edge 21, but it is not limited to this; a flat surface can also be formed between the inclined surface 29 and the offset edge 21. A chamfer can also be formed between the inclined surface 29 and the offset edge 21. In the example shown, the inclined surface 29 is formed between the offset edge 21 and the flat surface of the inner surface of the second flange 42.

[0093] The inclined surface 29 can extend between the leading edge 23 and the trailing edge 24 of the second wing plate 42 (suitably with a specified width). The second wing plate 42 has a side edge portion that is thinned by the inclined surface 29, which gradually thins towards the offset edge 21. Suitablely, the inclined surface 29 forms an acute angle of less than 45° with respect to a plane orthogonal to the height direction of the main part 4 of the pull head, preferably an angle in the range of 10° to 45° (or 15° to 40°).

[0094] Regarding the positioning of the offset edge 21 in the width direction of the main part 4 of the zipper pull, there are the aforementioned constraints (i.e., ensuring a balance between the support performance of the second wing plate 42 on the coil-shaped member 11a and the ease with which the coil-shaped member 11a can be disengaged from the zipper pull 9). If one or more of the conditions (a)-(d) above are satisfied, it can be said that the offset distance of the offset edge 21 is relatively small. This ensures the support performance of the second wing plate 42 on the coil-shaped member 11a, and the closing performance of the zipper 150 is maintained within acceptable limits. On the other hand, there is a concern that the ease with which the coil-shaped member 11a can be disengaged from the zipper pull 9 may not be sufficiently satisfied. In view of this, it is advantageous that the first guide portion 6 (especially its front portion 61) is shaped to facilitate the disengagement of the zipper teeth of the coil-shaped member 11a from the zipper pull 9.

[0095] In some cases, the first zipper tooth guide surface 65 has a height range (specifically, vertical range or vertical width) in the height direction of the main part 4 of the zipper pull that gradually decreases as it extends forward. In other words, the first zipper tooth guide surface 65 is shaped such that the contact area with the zipper teeth of the coil-shaped member 11a decreases or gradually decreases as it approaches the front opening 5m. This facilitates the ease with which the coil-shaped member 11a can be disengaged from the zipper pull 9.

[0096] Furthermore, the first chain tooth guide surface 65 is capable of: (i) including a region obliquely oriented toward the connecting end of the connecting post 43 and the second wing plate 42; (ii) including a region extending along a composite vector of a first vector, a second vector, and a third vector, wherein the first vector is a vector in the height direction of the main part of the pull head 4 from the second wing plate 42 toward the first wing plate 41, the second vector is a vector in the width direction of the main part of the pull head 4 toward a direction away from the connecting post 43, and the third vector is a vector parallel to the front-rear direction; and / or (iii) an area obliquely oriented toward the first wing plate 41 and away from the connecting post 43 as it extends forward.

[0097] In some cases, the end edge 65j (e.g., the lower edge) of the first chain tooth guide surface 65, which is furthest from the first wing plate 41 in the height direction of the main part 4 of the pull head, is inclined towards the first wing plate 41 as it extends forward (see reference). Figure 2 , Figure 3 This facilitates the easy disengagement of the coil-shaped member 11a from the pull head 9. Typically, as shown in the example, the end edge 65j of the first chain tooth guide surface 65 is formed at the front 61, that is, the front 61 is inclined towards the first wing plate 41 as it extends forward.

[0098] In some cases, the first guide portion 6 has at least one release surface 66 formed between the inner surface 6b of the first guide portion 6 (or, depending on the case, the first chain tooth guide surface 65 included in the inner surface 6b) and the end face 6d, and extends to reach the front surface 6a of the first guide portion 6. If the release surface 66 is formed in this way, the contact area between the coil-shaped member 11a and the first guide portion 6 is reduced, facilitating the ease with which the coil-shaped member 11a disengages from the pull head 9.

[0099] A release surface 66 is formed at least on the front portion 61 of the first guide portion 6. Preferably, the release surface 66 is formed throughout the front portion 61 and the rear portion 62, that is, including a front region 66m formed on the front portion 61 and a rear region 66n formed on the rear portion 62, or it can be divided into such a front region 66m and a rear region 66n. Preferably, the release surface 66 is formed with a larger area on the front portion 61 compared to the rear portion 62 of the first guide portion 6, and / or with a larger height range in the height direction of the slider 9. This facilitates the ease with which the coil-shaped member 11a can be disengaged from the slider 9.

[0100] The detachment surface 66 can be formed so that it is not visually discernible when the slider 9 is viewed from the side with the first guide portion 6 viewed from the front. The detachment surface 66 can be oriented obliquely towards the connection end with the second wing plate 42 facing the connecting post 43. The detachment surface 66 can extend along the composite vector of the first vector, the second vector, and the third vector, wherein the first vector is a vector from the second wing plate 42 toward the first wing plate 41 in the height direction of the main part 4 of the slider, the second vector is a vector in the width direction of the main part 4 of the slider moving away from the connecting post 43, and the third vector is a vector parallel to the front-rear direction. The detachment surface 66 can be oriented obliquely in a way that approaches the first wing plate 41 and moves away from the connecting post 43 as it extends forward. In this way, the ease of disengagement of the coil-shaped member 11a from the slider 9 is facilitated.

[0101] The release surface 66 has a first edge 66a between the release surface 66 and the end face 6d, a second edge 66b between the release surface 66 and the inner surface 6b (or, depending on the case, the first chain tooth guide surface 65), and a third edge 66c between the release surface 66 and the front surface 6a (see reference). Figure 2 , Figure 3 Both the first edge 66a and the second edge 66b extend forward in a manner that approaches the side of the first wing plate 41 and moves away from the connecting post 43.

[0102] The release surface 66 can be a flat surface rather than a curved surface like the chain tooth guide surface; specifically, it can be a chamfered C-surface (cut surface). Preferably, the release surface 66 forms an angle in the range of 45° to 80° with respect to a plane orthogonal to the width direction of the main part 4 of the slider (see reference). Figure 12 (θ). This prevents the coil-shaped member 11a from making strong contact with the first guide portion 6 when it disengages from the pull head 9.

[0103] The release surface 66 is formed to have a larger area in the front portion 61 compared to the rear portion 62 of the first guide portion 6, or it can be selectively formed in the front portion 61 of the first guide portion 6. In this case, it also promotes the ease with which the coil-shaped member 11a can be released from the pull head 9.

[0104] Advantageously, the front region 66m and the rear region 66n satisfy the following relationship. First, an imaginary guide 7' (refer to) is hypothetically defined as a mirror image of the second guide 7 about the center line CL of the pull head. Figure 13 ).exist Figure 13 In the diagram, the imaginary guide portion 7' ​​is shown in dashed lines, overlapping the first guide portion 6, allowing the shape difference between the two to be observed. The imaginary guide portion 7' ​​has an imaginary inner surface 7b' and an imaginary end surface 7d' corresponding to the second guide portion 7. An imaginary edge 7z' is formed between the imaginary inner surface 7b' and the imaginary end surface 7d'. Figure 14As shown, the distance Q1 between the rear region 66n and the imaginary edge 7z' on the plane orthogonal to the centerline CL is relatively small. In contrast, as... Figure 15 As shown, the distance Q2 between the front region 66m and the imaginary edge 7z' on the plane orthogonal to the center line CL is relatively large. Specifically, the distance Q2 is greater than the distance Q1, thereby achieving a good balance between the lateral tensile strength of the zipper 150 and the ease with which the coiled member 11a can be disengaged from the zipper pull 9. The distances Q1 and Q2 can also be set between the first edge 66a and the imaginary edge 7z', and the same applies to the second edge 66b, which will be described later.

[0105] Typically, the first distance Q1 is fixed in the front-rear direction, while the second distance Q2 gradually decreases towards the front. In the rear portion 62, the first tooth guide surface 65 can at least partially or entirely coincide with the imaginary tooth guide surface (not shown) included in the imaginary inner surface 7b'. In contrast, in the front portion 61, the first tooth guide surface 65 does not coincide at least partially or entirely with the imaginary tooth guide surface 75' included in the imaginary inner surface 7b', for example, it is offset towards the first wing plate 41. This facilitates the ease with which the coil-shaped member 11a can be disengaged from the pull head 9. Furthermore, the angle formed by the front region 66m and the vertical direction is equal to the angle formed by the rear region 66n and the vertical direction, but this is not necessarily the case.

[0106] Advantages, such as Figure 16 As shown, when the zipper chain formed by the engagement of the zipper teeth 11s and 12s passes through the zipper pull 9, and the coil-shaped members 11a and 12a of the zipper teeth 11s and 12s abut against the first tooth guide surface 65 and the second tooth guide surface 75 respectively, and are in their uppermost position, the front region 66m of the disengagement surface 66 is located above the center plane PL1 set at the thickness center of the coil-shaped member 12a, at least in its front end or in its entirety. Furthermore, as... Figure 16 As shown, when the zipper chain formed by the engaging zipper teeth 11s and 12s passes through the zipper pull 9, and the coil-shaped members 11a and 12a of the zipper teeth 11s and 12s abut against the first zipper tooth guide surface 65 and the second zipper tooth guide surface 75 at their uppermost positions, the rear region 66n of the disengagement surface 66 is located below the center surface PL1, at least at its rear end or throughout. This facilitates a faster or easier separation of the zipper teeth 11s from the zipper pull 9. The center surface PL1 can be set at the midpoint in the vertical direction of the space between the upper leg 2c and the lower leg 2d. The center surface PL1 can intersect with the midpoint between the upper and lower ends of the engaging head 2a extending in the vertical direction.

[0107] Reference Figures 7 to 12The method by which the zipper teeth 11s (especially the coil-shaped member 11a) disengages from the zipper pull 9 will be described. As described above, the first wing plate 41 is positioned on the upper side, and the second wing plate 42 is positioned on the lower side. First, as... Figure 7 , Figure 8 , Figure 10 and Figure 11 As shown, the coil-shaped members 11a and 12a are clamped from the left and right sides by the first chain tooth guide surface 65 and the second chain tooth guide surface 75, and are positionally restricted from the top. Although the figure shows the coil-shaped members 11a and 12a not in contact with the inner surface of the first wing plate 41, they can also partially or entirely contact the inner surface of the first wing plate 41. However, in this case, the sliding resistance of the pull head 9 may increase.

[0108] like Figure 8 As shown, the offset edge 21 contains multiple chain teeth included in the coil-shaped member 11a extending obliquely forward from the confluence point behind the connecting post 43. Figure 8 In the case of five teeth, the chain extends in an intersecting manner. That is, these multiple teeth are not adequately supported by the second wing plate 42. Regarding this point, as mentioned above, the coil-shaped member 11a is supported between the first tooth guide surface 65 and the second wing plate 42. The posture of the coil-shaped member 11a is stabilized by engaging with the coil-shaped member 12a, which is stably supported between the second tooth guide surface 75 and the second wing plate 42. Therefore, even if the offset edge 21 is formed, for example, to a position further forward than the front end of the first tooth guide surface 65, the basic performance of the zipper pull 9 (and consequently the basic performance of the zipper 150) will not be significantly impaired.

[0109] like Figure 9 As shown, the coil-shaped member 11a can be forcibly disengaged from the zipper pull 9. The zipper teeth of the coil-shaped member 11a disengage from the zipper teeth of the coil-shaped member 12a, and this action is performed continuously in a rearward direction. As a result, the zipper teeth between the coil-shaped members 11a and 12a throughout their entire length are disengaged from each other. During this forced disengagement operation, the zipper pull 9 is preferably positioned on the coil-shaped member 12a. Therefore, the zipper pull 9 preferably has a locking function (the aforementioned locking claw) capable of locking its own position.

[0110] like Figure 11 As shown, the reverse portion 2b of the zipper tooth of the coil-shaped member 11a is contacted or pressed by the first tooth guide surface 65 on the right and above. As described above, the vertical height of the first tooth guide surface 65 gradually decreases towards the front, thus facilitating the ease with which the coil-shaped member 11a disengages from the zipper pull 9. The disengagement surface 66 is formed as described above, further facilitating the ease with which the coil-shaped member 11a disengages from the zipper pull 9. Furthermore, in Figure 11 The middle is shown by a dashed line. Figure 12The positions of the first chain tooth guide surface, inner surface, release surface, and end face in the cross-section. These surfaces are offset further forward from the connecting post 43.

[0111] like Figure 12 As shown, when the zipper tooth strip 11s is pulled to the right, the coil-shaped member 11a changes from being in contact with the first tooth guide surface 65 to being in contact with the disengagement surface 66. Due to the orientation of the disengagement surface 66, the coil-shaped member 11a displaces obliquely downward. An inclined surface 29 is formed on the second wing plate 42, allowing the coil-shaped member 11a to smoothly displace in the aforementioned direction.

[0112] In some cases, the coil-shaped member 11a is pressed between the first guide portion 6 and the side edge of the second wing plate 42 (with the offset edge 21), pushing the first guide portion 6 upward and causing the right half of the first wing plate 41 to flex upward. Not limited to the first wing plate 41, the coil-shaped member 11a can also elastically deform. In another case, the coil-shaped member 11a is pressed between the first guide portion 6 and the side edge of the second wing plate 42 (with the offset edge 21), but the right half of the first wing plate 41 does not flex upward; only the coil-shaped member 11a elastically deforms. In yet another case, the coil-shaped member 11a is inserted between the first guide portion 6 and the side edge of the second wing plate 42 (with the offset edge 21), easily passing between them. That is, during its passage, neither the first wing plate 41 nor the coil-shaped member 11a elastically deforms. The reason is that there is a sufficient gap between the first guide section 6 and the side edge of the second wing plate 42.

[0113] Based on the above teachings, those skilled in the art can make various modifications to the embodiments and features. The reference numerals included in the claims are for reference only and should not be referenced for the purpose of limiting the interpretation of the claims.

[0114] The following utility models are also disclosed in this specification.

[0115] [Postscript 1]

[0116] A zipper pull (9) for use in zippers, the zipper pull comprising:

[0117] The main part (4) of the zipper pull includes a first wing plate (41), a second wing plate (42), and a connecting post (43) connecting the first wing plate (41) and the second wing plate (42). A chain tooth passage (5) branching through the connecting post (43) is defined in the main part (4). The chain tooth passage (5) includes left and right front openings (5m, 5n) located on either side of the connecting post (43) and a rear opening (5r) located behind the connecting post (43) and spatially connected to the left and right front openings (5m, 5n).

[0118] The first guide portion (6) and the second guide portion (7) are arranged spaced apart in the width direction of the main part of the zipper pull (4) such that the width of the chain tooth passage (5) gradually decreases towards the rear. The first guide portion (6) is connected to the first wing plate (41) along the first side edge (11) on the left and right sides, and the second guide portion (7) is connected to the first wing plate (41) along the second side edge (12) on the other left and right sides.

[0119] The first guide portion (6) and the second guide portion (7) include a first tooth guide surface (65) and a second tooth guide surface (75) facing each other in the width direction of the main part (4) of the zipper head. The first tooth guide surface (65) and the second tooth guide surface (75) have shapes suitable for guiding zipper teeth based on monofilaments.

[0120] The second wing plate (42) has an offset edge (21) that, compared to the farthest position (11f) of the first side edge (11) furthest from the center line (CL) in the width direction of the main part of the slider (4), is offset towards the center line (CL) in the width direction of the main part of the slider (4), wherein the center line (CL) extends linearly in the front-rear direction from the center of the connecting post (43) in the width direction.

[0121] The first guide portion (6) is shaped to facilitate the disengagement of the zipper teeth from the zipper head (9).

[0122] [Postscript 2]

[0123] In the zipper pull described in Appendix 1, the first chain tooth guide surface (65) has a height range in the height direction of the main part (4) of the zipper pull that gradually decreases as it extends forward.

[0124] [Postscript 3]

[0125] In the zipper described in Appendix 2, the end edge (65j) of the first chain tooth guide surface (65) that is furthest from the first wing plate (41) in the height direction of the main part (4) of the zipper is inclined toward the first wing plate (41) as it extends forward.

[0126] [Postscript 4]

[0127] In any of the pull heads described in Appendix 1 to Appendix 3, the first guide portion (6) has at least one release surface (66).

[0128] Regarding the at least one detachment surface (66),

[0129] (i) Oriented obliquely toward the connection end of the connecting post (43) and the second wing plate (42);

[0130] (ii) Extending along the composite vector of the first, second, and third vectors, wherein the first vector is a vector in the height direction of the main part of the slider (4) from the second wing plate (42) toward the first wing plate (41), the second vector is a vector in the width direction of the main part of the slider (4) toward a direction away from the connecting post (43), and the third vector is a vector parallel to the front-rear direction; and / or

[0131] (iii) Oriented obliquely as it extends forward toward the first wing (41) and away from the connecting post (43).

Claims

1. A zipper pull (9) for use in zippers, said zipper pull comprising: The main part (4) of the zipper pull includes a first wing plate (41), a second wing plate (42), and a connecting post (43) connecting the first wing plate (41) and the second wing plate (42). In this main part (4), a chain tooth passage (5) branching through the connecting post (43) is defined. The chain tooth passage (5) includes left and right front openings (5m, 5n) located on either side of the connecting post (43) and a rear opening (5r) located behind the connecting post (43) and spatially connected to the left and right front openings (5m, 5n). The first guide portion (6) and the second guide portion (7) are arranged spaced apart in the width direction of the main part of the zipper pull (4) such that the width of the chain tooth passage (5) gradually decreases towards the rear. The first guide portion (6) is connected to the first wing plate (41) along the first side edge (11) on the left and right sides, and the second guide portion (7) is connected to the first wing plate (41) along the second side edge (12) on the other left and right sides. The characteristic of the zipper head is that... The first guide portion (6) and the second guide portion (7) include a first tooth guide surface (65) and a second tooth guide surface (75) facing each other in the width direction of the main part (4) of the zipper head. The first tooth guide surface (65) and the second tooth guide surface (75) have shapes suitable for guiding zipper teeth based on monofilaments. The second wing plate (42) has an offset edge (21) that, compared to the farthest position (11f) of the first side edge (11) furthest from the center line (CL) in the width direction of the main part of the slider (4), is offset towards the center line (CL) in the width direction of the main part of the slider (4), wherein, The centerline (CL) extends linearly along the front-back direction from the center of the width direction of the connecting column (43). The offset edge (21) extends between the leading edge (23) and the trailing edge (24) of the second wing plate (42), and the point (P1) where the offset edge (21) connects to the leading edge (23) of the second wing plate (42) is located in front of the front end of the first chain tooth guide surface (65) in a direction parallel to the center line (CL).

2. The zipper pull according to claim 1, characterized in that, The offset edge (21) extends linearly between the leading edge (23) and the trailing edge (24) of the second wing (42).

3. The zipper pull according to claim 1, characterized in that, When viewed from the front, the outer surface of the second wing (42) overlaps at least partially with the first guide portion (6).

4. The zipper pull according to any one of claims 1 to 3, characterized in that, The second wing plate (42) has an opposite edge (22) located on the opposite side of the offset edge (21) in the width direction of the main part (4) of the pull head. The opposite edge (22) is formed symmetrically with respect to the second side edge (12) of the first wing plate (41) about a plane orthogonal to the connecting post (43).

5. The zipper pull according to any one of claims 1 to 3, characterized in that, The first guide portion (6) is shaped to facilitate the disengagement of the zipper teeth from the zipper head (9).

6. The zipper pull according to any one of claims 1 to 3, characterized in that, The first chain tooth guide surface (65) has a height range in the height direction of the main part of the pull head (4) that gradually decreases as it extends forward.

7. The zipper pull according to claim 6, characterized in that, The end edge (65j) of the first chain tooth guide surface (65) that is furthest from the first wing plate (41) in the height direction of the main part (4) of the pull head is inclined toward the first wing plate (41) as it extends forward.

8. The zipper pull according to any one of claims 1 to 3, characterized in that, The first guide portion (6) has at least one release surface (66). Regarding the at least one detachment surface (66), (i) Oriented obliquely toward the connection end of the connecting post (43) and the second wing plate (42); (ii) Extending along the composite vector of the first, second, and third vectors, wherein the first vector is a vector in the height direction of the main part of the slider (4) from the second wing plate (42) toward the first wing plate (41), the second vector is a vector in the width direction of the main part of the slider (4) toward a direction away from the connecting post (43), and the third vector is a vector parallel to the front-rear direction; and / or (iii) Oriented obliquely as it extends forward toward the first wing (41) and away from the connecting post (43).

9. The zipper pull according to claim 8, characterized in that, The first guide portion (6) has a front surface (6a), an inner surface (6b), an outer surface (6c), and an end surface (6d) facing the opposite side of the first wing plate (41). The at least one detachment surface (66) is formed between the inner side surface (6b) and the end surface (6d) and extends to reach the front surface (6a).

10. The zipper pull according to claim 8, characterized in that, The first guide portion (6) has a front portion (61) extending obliquely forward away from the center line (CL), and the at least one detachment surface (66) is formed at least in the front portion (61) of the first guide portion (6).

11. The zipper pull according to claim 8, characterized in that, The at least one detachment surface (66) is formed such that it cannot be visually identified when the pull head is viewed from the side with the first guide portion (6) viewed from the front.

12. The zipper pull according to claim 8, characterized in that, The first guide portion (6) has: a front portion (61) extending obliquely forward away from the center line (CL); and a rear portion (62) located behind the front portion (61) and extending parallel to a plane orthogonal to the width direction of the main portion (4) of the slider. The detachment surface (66) includes a front region (66m) formed on the front portion (61) and a rear region (66n) formed on the rear portion (62).

13. The zipper pull according to claim 12, characterized in that, An imaginary guide portion (7') is hypothetically set to be mirror-symmetrical about the centerline (CL) of the pull head and the second guide portion (7). The imaginary guide portion (7') includes an imaginary inner side surface (7b') and an imaginary end surface (7d') facing the opposite side of the first wing plate (41). An imaginary edge (7z') is formed between the imaginary inner side surface (7b') and the imaginary end surface (7d'). The distance (Q2) between the front region (66m) and the imaginary edge (7z') on a plane orthogonal to the centerline (CL) is greater than the distance (Q1) between the rear region (66n) and the imaginary edge (7z') on a plane orthogonal to the centerline (CL).

14. The zipper pull according to claim 8, characterized in that, The first guide portion (6) has: a front portion (61) extending obliquely forward away from the center line (CL); and a rear portion (62) located behind the front portion (61) and extending parallel to a plane orthogonal to the width direction of the main portion (4) of the slider. The detachment surface (66) is formed to have a larger area in the front portion (61) than the rear portion (62) of the first guide portion (6), or is selectively formed in the front portion (61) of the first guide portion (6).

15. The zipper pull according to any one of claims 1 to 3, characterized in that, The first guide portion (6) has a front portion (61) extending obliquely forward away from the center line (CL), and the first guide portion (6) has a width that gradually decreases as it extends forward, at least in its front portion (61).

16. The zipper pull according to any one of claims 1 to 3, characterized in that, The outer surface of the first wing plate (41) includes an inclined surface (45) that gradually reduces the thickness of the first wing plate (41) as it extends away from the centerline (CL) of the main part of the pull head (4).

17. The zipper pull according to any one of claims 1 to 3, characterized in that, The inner surface of the second wing plate (42) has an inclined surface (29) that is inclined in the width direction of the main part of the pull head (4) in such a way that it moves away from the first wing plate (41) as it moves away from the connecting post (43).

18. The zipper pull according to any one of claims 1 to 3, characterized in that, The first tooth guide surface (65) and the second tooth guide surface (75) are formed in such a way that they are bent in a manner suitable for the contours of the reverse portions (2b) of the multiple zipper teeth in the zipper head (9) of the multiple zipper teeth of the coil-shaped member formed by winding the monofilament into a spiral.

19. The zipper pull according to claim 18, characterized in that, The first chain tooth guide surface (65) and the second chain tooth guide surface (75) have a height approximately half the height of the reversing part (2b) in a direction parallel to the height direction of the main part of the slider (4).

20. A zipper, characterized in that, have: A pair of left and right zipper teeth (11s, 12s) comprising a pair of left and right coil-shaped members (11a, 12a) with a monofilament wound into a spiral shape and a pair of left and right zipper tapes (11b, 12b) supporting the pair of left and right coil-shaped members (11a, 12a), wherein the pair of left and right coil-shaped members (11a, 12a) have a plurality of engaging heads (2a) at positions protruding from opposite edges of the pair of left and right zipper tapes (11b, 12b); and The zipper pull (9) according to any one of claims 1 to 3, The zipper pull (9) is installed in such a way that one of the coil-shaped members (11a, 12a) of the left and right pair of zipper teeth (11s, 12s) cannot be detached, while the other coil-shaped member (11a, 12a) of the left and right pair of zipper teeth (11s, 12s) can be disengaged from the zipper pull (9) through the space between the offset edge (21) of the zipper pull (9) and the first guide (6).

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