Sliders and zippers

Abstract

The present invention provides a slider and a zipper. On a zipper chain tape (4b), a slider (5) rotates in such a manner that a connecting column (53) of the slider (5) is away from a zipper tooth (3b) provided on the zipper chain tape. The slider (5) stops rotating due to the collision between the zipper tooth (3b) and the flange portion (54, 55) of the slider (5). At this time, the belt facing surface (26b) extending toward the flange portion (54, 55) forms an angle of less than 45 degrees with the center line (X5) of the slider (5).

Description

Technical Field

[0001] The invention relates to a slider and a zipper. Background Art

[0002] Patent Document 1 discloses a structure in which a wedge-shaped protrusion for expanding the edge of the zipper tape is provided on the upper wing plate of the slider. Figure 4 、 Figure 5 The same structure is also disclosed.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 3379004

[0006] Patent Document 2: Japanese Patent No. 4072951 Summary of the Invention

[0007] A zipper slider is sometimes moved along the zipper elements of a single zipper tape (hereinafter referred to as a single zipper tape) for a purpose other than opening and closing a pair of zipper tapes. For example, when sewing a zipper to clothing, the slider can interfere with the sewing process, and the slider is moved along the zipper elements of a single zipper tape. Furthermore, the slider is sometimes moved along the zipper elements of a single zipper tape simply for fun or to pass the time.

[0008] The structure of the slider, particularly the structure for regulating the movement trajectory of the zipper tape and zipper elements (e.g., the wedge-shaped protrusions of Patent Document 1), is based on the premise that the slider moves to open and close a pair of zipper tapes. The inventors of the present application have recently discovered that a slider designed based on this premise may not be well suited for movement along the zipper elements on a single zipper tape.

[0009] In a zipper according to one embodiment of the present invention, a pair of zipper chain tapes are closed by advancing a slider and opened by retreating the slider, and the pair of zipper chain tapes include a zipper tape and zipper elements provided along one side edge of the zipper tape.

[0010] The slider includes an upper wing plate, a lower wing plate, a connecting column connecting the upper wing plate and the lower wing plate, and a flange portion provided on the upper wing plate or the lower wing plate.

[0011] The upper wing plate is provided with a protrusion extending rearward in order to be inserted between the facing surfaces of a pair of zipper tapes.

[0012] On one zipper chain tape of a pair of zipper chain tapes, the slider rotates in such a manner that the connecting column moves away from the zipper teeth provided on the one zipper chain tape, and when the slider stops rotating due to the collision between the zipper teeth and the flange portion, the facing surface of the tape extending toward the flange portion forms an angle of less than 45° with the center line of the slider.

[0013] In certain embodiments, the protrusion has a tapered rear end portion whose width narrows toward the rear, and an angle formed by a center line of the slider and a side surface of the rear end portion is greater than 45°.

[0014] In certain embodiments, when the length of the protrusion is d1 and the distance between the connecting post and the rear end of the slider is d2, d1 / d2≤0.7 is satisfied.

[0015] In certain embodiments, when the slider is pulled rearward on one fastener stringer while the slider stops rotating as described above, the side surface of the rear end portion of the protrusion slides on the tape-facing surface of the fastener stringer.

[0016] In certain embodiments, the lower wing plate has a partition portion extending rearward from the connecting column so as to at least partially face the protrusion.

[0017] In certain embodiments, the zipper tape includes a tape base fabric and a waterproof layer provided on the tape base fabric, and the slider has a locking claw having a claw end capable of protruding into the element passage of the slider through a claw hole provided in the protruding strip.

[0018] In a zipper according to another embodiment of the present disclosure, a pair of zipper chain tapes are closed by advancing a slider and opened by retreating the slider, and the pair of zipper chain tapes include a zipper tape and zipper elements provided along one side edge of the zipper tape.

[0019] The slider includes an upper wing plate, a lower wing plate, and a connecting column connecting the upper wing plate and the lower wing plate. The stacked portion of the zipper tape and the zipper teeth is arranged between the upper wing plate and the lower wing plate. The upper surface of the zipper tape can contact the upper wing plate, and the zipper teeth arranged on the lower surface of the zipper tape can contact the lower wing plate.

[0020] The upper wing plate is provided with a protrusion extending rearward in order to be inserted between the facing surfaces of a pair of zipper tapes.

[0021] The protrusion has the following length: on one zipper chain of a pair of zipper chain tapes, when the slider is pulled backward in a state where the slider rotates so as to move the connecting column away from the zipper teeth provided on the one zipper chain tape, the stacked portion will not enter between the protrusion and the lower wing plate.

[0022] In certain embodiments, when the length of the protrusion is d1 and the distance between the connecting post and the rear end of the slider is d2, d1 / d2≤0.7 is satisfied.

[0023] In certain embodiments, the protrusion has a tapered rear end portion whose width narrows toward the rear, and an angle formed by a center line of the slider and a side surface of the rear end portion is greater than 45°.

[0024] In certain embodiments, the slider is rotated until the flange portion of the slider contacts the zipper elements of one zipper stringer.

[0025] Another embodiment of the present disclosure relates to a slider for a zipper including an upper wing plate, a lower wing plate, and a connecting post connecting the upper wing plate and the lower wing plate.

[0026] The upper wing plate is provided with a protrusion that extends rearward in order to be inserted between the facing surfaces of a pair of fastener tapes to be opened and closed by the slider.

[0027] When the length of the protrusion is d1 and the distance between the connecting post and the rear end of the slider is d2, d1 / d2≤0.7 is satisfied.

[0028] The protrusion has a tapered rear end portion whose width becomes narrower toward the rear, and an angle formed by a center line of the slider and a side surface of the rear end portion is greater than or equal to 45 degrees.

[0029] In certain embodiments, the slider has a locking claw having a claw end that is capable of protruding into the element passage of the slider through a claw hole provided in the protruding strip.

[0030] Effects of the Invention

[0031] According to one aspect of the present disclosure, it is possible to facilitate provision of a slider well suited for a case where the slider moves along fastener elements on a single fastener tape. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a plan view of a slide fastener according to one embodiment of the present disclosure.

[0033] Figure 2 This is a bottom view of the slide fastener according to one embodiment of the present disclosure.

[0034] Figure 3 This is a schematic cross-sectional view of a closed zipper chain.

[0035] Figure 4 This is a plan view showing a state in which the slider is positioned in the middle along the fastener elements on the single fastener tape.

[0036] Figure 5 This is a schematic cross-sectional view of a slider.

[0037] Figure 6 This is a schematic diagram showing the inner surface of the upper blade of the slider.

[0038] Figure 7 This is a schematic diagram showing the inner surface of the lower blade of the slider.

[0039] Figure 8This is a reference diagram for explaining the technical effect of shortening the protrusion of the upper wing plate of the slider. The position and trajectory of the belt facing surface are shown by the dot-dash line.

[0040] Figure 9 Regarding Patent Document 1 Figure 2 Reference drawing of the slider shown.

[0041] Figure 10 This is a schematic diagram showing a schematic structure of a non-limiting example of a slider with an automatic stop function.

[0042] Figure 11 This is a schematic diagram showing a case where the fastener tape is a water-blocking tape.

[0043] Description of Reference Numerals

[0044] 2a, 2b zipper tape

[0045] 3a, 3b zipper teeth

[0046] 4a, 4b zipper chain ties

[0047] 5 Slider

[0048] 51 Upper wing panel

[0049] 52 Lower wing panel

[0050] 53 Connecting Column

[0051] 56 protrusions

[0052] 56e rear end

[0053] 56a, 56b side DETAILED DESCRIPTION

[0054] Below, refer to Figures 1 to 11 , various embodiments and features are described. Those skilled in the art will be able to combine the various embodiments and / or features without excessive explanation, and will also be able to understand the synergistic effect brought about by the combination. In principle, repeated descriptions between the embodiments are omitted. The accompanying drawings are mainly for the purpose of describing the invention and are simplified for the convenience of drawing. Each feature is not only valid for the zipper and slider disclosed in this application, but should be understood as a universal feature that is also common to various other zippers and sliders not disclosed in this specification.

[0055] like Figure 1As shown, the zipper 1 has a pair of left and right zipper tapes 4a and 4b. The tapes 4a and 4b are closed by the forward movement of the slider 5 and opened by the backward movement of the slider 5. Each tape 4a and 4b includes a zipper tape 2a and 2b, and zipper elements 3a and 3b provided on one side edge of the zipper tape 2a and 2b. In this specification, the front-to-back direction is understood based on the movement of the slider 5. The up-down direction is orthogonal to the front-to-back direction and to the tape surface of the zipper tape (the surface that specifies the tape thickness). The left-right direction is orthogonal to the front-to-back direction and the up-down direction.

[0056] The zipper tapes 2a and 2b are composed of upper and lower tape surfaces 21 and 22 (see Figure 3 ) A flexible single-layer or multi-layer thin material of a predetermined thickness. The zipper tape may include a tape base fabric comprising a knitted fabric, a woven fabric, or a hybrid of the two. Knitted fabric has greater elasticity and flexibility than woven fabric, and is expected to readily follow the movement (e.g., local movement) of the zipper elements provided in the zipper tape.

[0057] The zipper elements 3a and 3b are coil-shaped elements made of a monofilament wound in a spiral shape, and are sewn to the tape surface 22 of the zipper tapes 2a and 2b by means of mounting thread. When the zipper 1 is closed, the zipper elements 3a and 3b are covered from above by the zipper tapes 2a and 2b and are thus obscured (i.e., they are not visible or are difficult to see). In addition, it should be noted that the degree to which the zipper tapes 2a and 2b obstruct the zipper elements 3a and 3b is adjustable. In addition, if Figure 2 As shown, when the slide fastener 1 is viewed from below, the fastener elements 3a and 3b are not at all hidden by the fastener tapes 2a and 2b. The fastener elements 3a and 3b are not limited to coil-shaped elements, and may be resin or metal elements.

[0058] The coil-shaped fastener element is continuously constituted by a unit structure including an upper leg 31, a lower leg 32, a head 33 and a reverse portion 34 (see Figure 3 ). The upper leg 31 is arranged in contact with the belt surface 22. The lower leg 32 is arranged away from the belt surface 22. The head 33 extends in the up-down direction so as to connect the upper leg 31 and the lower leg 32, and the wire width in the front-to-back direction is larger than the wire width of the upper leg 31 and the lower leg 32. The reversing portion 34 extends so as to connect the upper leg 31 and the lower leg 32 in the adjacent unit structure. Whether or not to provide a core wire in the spiral structure of the coil-shaped chain element is optional.

[0059] The zipper 1 further includes: front stoppers 8a, 8b, which are provided at the front ends of the zipper elements 3a, 3b to prevent the slider 5 from moving forward; and rear stoppers 8c, which allow the zipper element tapes 4a, 4b to be opened and separated. Figure 4As shown, when the fastener tapes 4a and 4b are separated, the slider 5 can move forward and backward along the fastener elements 3b provided on the single fastener tape 4b (hereinafter referred to as the single fastener tape 4b). The slider 5 moves forward and backward on the single fastener tape 4b without causing the fastener tapes 4a and 4b to open or close. This is sometimes done to ensure ease of sewing when sewing the zipper 1 to clothing, or simply for fun or to kill time.

[0060] The centerline X5 of the slider 5 is tilted relative to the axis X2, which is parallel to the length direction (front-back direction) of the single-stripe chain 4b. When the slider 5 is pulled backward on the single-stripe chain 4b, the slider 5 may tilt further relative to the single-stripe chain 4b, that is, the angle formed by the axis X2 and the centerline X5 may increase. As mentioned at the beginning, the structure of the slider, especially the structure for determining the movement trajectory of the zipper tape and zipper elements, is generally based on the premise that the slider moves in order to open and close a pair of zipper tapes. The movement of the slider 5 on the single-stripe chain 4b can be said to be unexpected, and the slider 5 may not be well suited to this operation.

[0061] Reference Figures 5 to 9 The slider 5 is described in detail. The slider 5 includes an upper wing plate 51, a lower wing plate 52, a connecting post 53 connecting the wing plates 51 and 52, a flange portion 54 provided on the upper wing plate 51, a flange portion 55 provided on the lower wing plate 52, a pull-tab mounting portion 58 provided on the upper wing plate 51, and a pull-tab 59 mounted on the pull-tab mounting portion 58 (see FIG. Figure 1 and Figure 4 The material of the slider 5 is arbitrary, for example, metal, resin or ceramic. The slider 5 can be fixed by attaching a locking claw 60 (optionally, a leaf spring 61 and a cover 62) to be described later (see Figure 10 ) is assembled to the slider body, which includes an upper wing plate 51, a lower wing plate 52, a connecting column 53, a flange portion 54 and a flange portion 55.

[0062] A Y-shaped chain element passage is formed by the upper wing plate 51, the lower wing plate 52 and the connecting post 53. The connecting post 53 extends in the up-down direction in a manner that separates the coupled zipper elements 3a, 3b. The connecting post 53 has a tapered rear end portion 53t whose width narrows toward the rear. The flange portions 54, 55 are provided so that the individual or coupled zipper elements 3a, 3b move along a desired trajectory in the chain element passage. The stacked portions 9a, 9b (see FIG. 1 ) of the zipper tapes 2a, 2b and the zipper elements 3a, 3b are Figure 3) is disposed between the upper wing plate 51 and the lower wing plate 52. The tape surface 21 of the fastener tapes 2a and 2b can contact the upper wing plate 51 (its inner surface) and the flange portion 54. The tape surface 22 of the fastener tapes 2a and 2b can contact the flange portion 55. The fastener elements 3a and 3b can contact the lower wing plate 52 (its inner surface) and the flange portion 55.

[0063] The upper wing plate 51 is provided with a protrusion 56 to be inserted into the tape facing surfaces 26a and 26b of the pair of fastener tapes 2a and 2b (see Figure 3 ) and extends rearward from the connecting column 53. The protrusion 56 has a tapered rear end portion 56e whose width narrows as it moves toward the rear. The left and right side surfaces 56a, 56b of the rear end portion 56e gradually approach each other as it moves toward the rear. The side surface 56a contacts the tape-facing surface 26a, and the side surface 56b contacts the tape-facing surface 26b. The top 56c of the rear end portion 56e is formed by the side surfaces 56a, 56b. When the slider 5 is pulled rearward, the protrusion 56 enters between the tape-facing surfaces 26a, 26b of the zipper tapes 2a, 2b, promoting the smooth release of the connection between the zipper elements 3a, 3b by the connecting column 53. In addition, the tape-facing surfaces 26a, 26b are the side surfaces of the zipper tapes 2a, 2b, and the tape-facing surfaces 26a, 26b are arranged so as to face each other when the zipper element tassels 4a, 4b are opened and closed by the slider 5.

[0064] The upper wing plate 51 is provided with a shallow groove 51j extending rearward from the protrusion 56 to provide an escape space for the zipper tapes 2a and 2b to be separated by the protrusion 56. The upper wing plate 51 is provided with a chain element pressing portion 51u to suppress the displacement of the zipper elements 3a and 3b in the slider 5. The lower wing plate 52 is provided with a convex partition 52j, which extends rearward from the connecting column 53 in a manner opposite to the protrusion 56 to separate the movement path of the zipper elements 3a and 3b. When the partition 52j is provided, the escape space of the stacked portion 9b when the slider 5 moves on the single chain tape 4b may be narrowed. If the partition 52j is omitted, the stability of the slider 5 in opening and closing the zipper chain tapes 4a and 4b may be reduced.

[0065] Figure 8 Indicates the following status: Figure 4 On the single-tooth chain 4b shown, the slider 5 is rotated (rotated counterclockwise when viewed from above (refer to FIG. 1 ) so that the connecting post 53 is away from the fastener element 3b provided on the single-tooth chain 4b. Figure 4 As shown in the arrow), the slider 5 stops rotating due to the collision between the fastener element 3b and the flange portion 55 on the left side (particularly, the flange rear end portion). Figure 8 The position and trajectory of the belt facing surface 26b are shown by the dot-dash line.

[0066] In the present embodiment, the tape facing surface 26b extending toward the flange portion 54 (or the flange portion 55 if the flange portion 54 is not provided) forms an angle of less than 45° (e.g., 44°, 43°, 42°, 41°, 40°, ... (intermediate values ​​omitted) ..., 15°) with the center line X5 of the slider 5 (see θ4). Additionally or alternatively, in some cases, the side surface 56b of the rear end portion 56e of the protrusion 56 forms an angle of more than 45° (e.g., 46°, 47°, 48°, 49°, 50°, ... (intermediate values ​​omitted) ..., 75°) with the center line X5 of the slider 5 (see θ2). θ2 is 90° in some cases. In this case, the slider 5 can also be well adapted to move along the fastener elements 3b on the single tooth chain tape 4b. For example, when the slider 5 is rotated relative to the single fastener tape 4b and pulled rearward as described above, the fastener tape 2b can be prevented from climbing onto the protrusion 56 (i.e., the laminated portion 9b enters between the protrusion 56 and the lower wing plate 52), thereby preventing or obstructing the slider 5 from retreating. The side surface 56a of the rear end portion 56e of the protrusion 56, like the side surface 56b, forms an angle of 45° or greater with the centerline X5 of the slider 5, but this is not limited to this. Furthermore, when the slider 5 is rotated relative to the single fastener tape 4b and pulled rearward as described above, the side surface 56b of the rear end portion 56e of the protrusion 56 slides on the tape-facing surface 26b of the fastener tape 2b of the single fastener tape 4b.

[0067] Typically, by extending the protrusion 56 rearward for a longer distance, the fastener tapes 2a and 2b can be pre-separated in the left-right direction at a position farther from the connecting post 53, thereby promoting stable opening and closing of the fastener tapes 4a and 4b. In this embodiment, the protrusion 56 is not extended rearward for a longer distance, but is shortened. In short, the protrusion 56 has a length d1 such that when the slider 5 is pulled rearward on one of the pair of fastener tapes 4a and 4b, rotating the fastener tape 4b so that the connecting post 53 is away from the fastener elements 3b provided on that fastener tape 4b, the laminated portion 9b does not enter between the protrusion 56 and the lower wing plate 52. This prevents the fastener tape 2b from climbing onto the protrusion 56 (i.e., the laminated portion 9b enters between the protrusion 56 and the lower wing plate 52), thereby preventing or obstructing the rearward movement of the slider 5. When the protrusion 56 extends rearward from the connecting column 53 , the length d1 of the protrusion 56 corresponds to the (maximum) distance between the connecting column 53 and the rear end of the protrusion 56 .

[0068] In some cases, when the length of the protrusion 56 is d1 and the distance between the connecting post 53 and the rear end of the slider 5 is d2, d1 / d2 ≤ 0.7 is satisfied. Depending on the situation, d1 / d2 ≤ 0.65 or d1 / d2 ≤ 0.6 is satisfied. It is expected that shortening the protrusion 56 will make it easier to meet the angle condition between the tape-facing surface 26b and the centerline X5 of the slider 5.

[0069] In the embodiment in which the protrusion 56 of the slider 5 is provided with the claw hole 51n, if the fastener tape 2b climbs onto the protrusion 56 (i.e., if the laminated portion 9b enters between the protrusion 56 and the lower wing plate 52), the fastener tape 2b may be pressed into the claw hole 51n, causing scratches on the tape surface 21 of the fastener tape 2b. This disadvantage can be avoided or suppressed by satisfying the conditions regarding the angle formed by the tape-facing surface 26b and the center line X5 of the slider 5.

[0070] To understand the above features more clearly, refer to Figure 9 Provide explanation. Figure 9 According to Patent Document 1 Figure 2 Created for reference only. Figure 9 and Figure 8 Similarly, the following state is shown: On the single fastener tape 4b, the slider 5 is rotated so that the connecting post 53 is separated from the fastener element 3b provided on the single fastener tape 4b (see Figure 4 As shown in the arrow, the slider 5 stops rotating due to the collision between the fastener element 3b and the flange portion 55 (particularly the rear end portion of the flange).

[0071] exist Figure 9 In the case shown, the tape-facing surface 26b extending toward the flange 54 (or the flange 55 if the flange 54 is not provided) forms an angle of 45° or greater with the centerline X5 of the slider 5 (see θ4'). Similarly, the side surface 56b of the rear end portion 56e of the protrusion 56 forms an angle of 45° or less with the centerline X5 of the slider 5 (see θ2'). In this case, when the slider 5 is rotated relative to the single fastener tape 4b as described above and pulled rearward, there is a possibility that the fastener tape 2b will climb onto the protrusion 56 (i.e., the laminated portion 9b enters between the protrusion 56 and the lower wing plate 52), thereby preventing or obstructing the slider 5 from moving backward.

[0072] The slider 5 may have an automatic stop function. In this case, the slider 5 has a locking claw 60, and the claw end 60t of the locking claw 60 is provided in a manner that can protrude into the chain element passage of the slider 5 through the claw hole 51n provided in the upper wing plate 51 (for example, the protrusion 56). The locking claw 60 is provided so as to be elastically displaceable between a locked position (locked posture) and an unlocked position (unlocked posture) according to the operation of the pull tab 59. For example, Figure 10As shown, a locking claw 60, a leaf spring 61 for applying force to the locking claw 60, and a cover 62 for housing the locking claw 60 and the leaf spring 61 are provided. The locking claw 60 has a claw end 60t that can protrude from the claw hole 51n into the chain element passage. The claw end 60t of the locking claw 60 is moved to an unlocked position where it does not protrude from the claw hole 51n by the operating lever 59k of the pull tab 59, thereby releasing the lock. If the pull tab 59 is released from the hand, the pull tab 59 is applied by the leaf spring 61, and the locking claw 60 is returned to the locked position. Various types of locking claws 60 are known, and are not limited to the example shown in the figure. For example, in other cases, the locking claw 60 is a component obtained by bending a leaf spring, and is fixed to the upper wing plate 51 in such a way that the claw end 60t of the locking claw 60 protrudes from the claw hole 51n.

[0073] Figure 11 This indicates that the zipper tapes 2a and 2b are composed of multiple layers. The zipper tapes 2a and 2b each include a base fabric 2m and a waterproof layer 2n disposed on the base fabric 2m. The base fabric 2m may be knitted, woven, or a combination of the two. The waterproof layer 2n is a resin layer (e.g., a transparent resin layer) formed on the base fabric 2m by coating or adhesive bonding. The waterproof layer 2n is a resin layer such as polyurethane and has a lower flexibility than the base fabric 2m.

[0074] In the configuration where the protrusion 56 of the slider 5 is provided with a claw hole 51n, if the fastener tape 2b climbs onto the protrusion 56 (i.e., the laminated portion 9b enters between the protrusion 56 and the lower wing plate 52), the fastener tape 2b may be pressed into the claw hole 51n, causing scratches on the tape surface 21 of the fastener tape 2b. If the fastener tapes 2a and 2b include a waterproof layer 2n, scratches on the waterproof layer 2n can reduce the commercial value of the zipper 1 and the garment to which it is attached. As described above, by satisfying the conditions regarding the angle formed by the tape-facing surface 26b and the centerline X5 of the slider 5, this can be avoided or suppressed.

[0075] Based on the above teachings, those skilled in the art can make various changes to the various embodiments. The reference numerals in the claims are for reference only and are not to be used for the purpose of limiting the scope of the claims.

Claims

1. A zipper (1), characterized in that: A pair of zipper chain tapes (4a, 4b) are closed by advancing a slider (5) and opened by retreating the slider (5), the pair of zipper chain tapes (4a, 4b) comprising zipper tapes (2a, 2b) and zipper teeth (3a, 3b) arranged along one side edge of the zipper tapes (2a, 2b). The slider (5) includes an upper wing plate (51), a lower wing plate (52), a connecting column (53) connecting the upper wing plate (51) and the lower wing plate (52), and flanges (54, 55) provided on the upper wing plate (51) or the lower wing plate (52). The upper wing plate (51) is provided with a protrusion (56) extending rearward in order to be inserted between the opposing tape surfaces (26a, 26b) of the pair of zipper tapes (2a, 2b). On one zipper chain tape (4b) of the pair of zipper chain tapes (4a, 4b), the slider (5) rotates in such a manner that the connecting column (53) moves away from the zipper teeth (3b) provided on the one zipper chain tape (4b), and when the slider (5) stops rotating due to the collision between the zipper teeth (3b) and the flange portion (54, 55), the belt facing surface (26b) extending toward the flange portion (54, 55) forms an angle of less than 45° with the center line (X5) of the slider (5).

2. The zipper according to claim 1, wherein: The protrusion (56) has a tapered rear end portion (56e) whose width narrows toward the rear, and the angle formed by the center line (X5) of the slider (5) and the side surface (56b) of the rear end portion (56e) is greater than 45 degrees.

3. The zipper according to claim 1 or 2, characterized in that: When the length of the protrusion (56) is set to d1 and the distance between the connecting column (53) and the rear end of the slider (5) is set to d2, d1 / d2≤0.7 is satisfied.

4. The zipper according to claim 1 or 2, characterized in that: When the slider (5) is pulled backward on the zipper chain (4b) in the state where the slider (5) stops rotating as described above, the side surface (56b) of the rear end portion (56e) of the protrusion (56) slides on the tape facing surface (26b) of the zipper tape (2b) of the zipper chain (4b).

5. The zipper according to claim 1 or 2, characterized in that: The lower wing plate (52) has a partition portion (52j) extending rearward from the connecting column (53) in a manner such that at least a portion of the partition portion (52j) faces the protrusion (56).

6. The zipper according to claim 1 or 2, characterized in that: The zipper tape (2a, 2b) comprises a tape base fabric (2m) and a waterproof layer (2n) provided on the tape base fabric (2m). The slider (5) has a locking claw (60) provided with a claw end (60t) capable of protruding to the chain tooth passage of the slider (5) through a claw hole (51n) provided on the protruding strip (56).

7. A zipper (1), characterized in that: A pair of zipper chain tapes (4a, 4b) are closed by advancing a slider (5) and opened by retreating the slider (5), the pair of zipper chain tapes (4a, 4b) comprising zipper tapes (2a, 2b) and zipper teeth (3a, 3b) arranged along one side edge of the zipper tapes (2a, 2b). The slider (5) includes an upper wing plate (51), a lower wing plate (52), and a connecting column (53) connecting the upper wing plate (51) and the lower wing plate (52); a Y-shaped chain tooth passage is formed by the upper wing plate (51), the lower wing plate (52), and the connecting column (53); the stacked portion (9a, 9b) of the zipper tape (2a, 2b) and the zipper chain teeth (3a, 3b) is arranged between the upper wing plate (51) and the lower wing plate (52); the upper surface (21) of the zipper tape (2a, 2b) can contact the upper wing plate (51); the zipper chain teeth (3a, 3b) arranged on the lower surface (22) of the zipper tape (2a, 2b) can contact the lower wing plate (52); The upper wing plate (51) is provided with a protrusion (56), and the protrusion (56) extends rearward from the connecting column (53) at a certain height to the rear end of the protrusion (56) in order to be inserted between the tape facing surfaces (26a, 26b) of the pair of zipper tapes (2a, 2b), and the protrusion (56) is provided in a manner spaced upward from the lower wing plate (52). The protrusion (56) has the following length (d1): on one zipper chain tape (4b) of the pair of zipper chain tapes (4a, 4b), when the slider (5) is pulled backward in a state where the slider (5) is rotated so that the connecting column (53) is away from the zipper tooth (3b) provided on the one zipper chain tape (4b), the stacked portion (9b) will not enter between the protrusion (56) and the lower wing plate (52).

8. The zipper according to claim 7, wherein: When the length of the protrusion (56) is set to d1 and the distance between the connecting column (53) and the rear end of the slider (5) is set to d2, d1 / d2≤0.6 is satisfied.

9. The slide fastener according to claim 7 or 8, characterized in that: The protrusion (56) has a tapered rear end portion (56e) whose width narrows toward the rear, and the angle formed by the center line (X5) of the slider (5) and the side surface (56b) of the rear end portion (56e) is greater than 45 degrees.

10. The slide fastener according to claim 7 or 8, characterized in that: The slider (5) is rotated until the flange portion (54, 55) of the slider (5) contacts the zipper elements (3a, 3b) of the one zipper stringer (4a, 4b).

11. A slider (5), characterized in that: The slider (5) is a zipper slider (5) comprising an upper wing plate (51), a lower wing plate (52), and a connecting post (53) connecting the upper wing plate (51) and the lower wing plate (52), wherein a Y-shaped chain tooth passage is formed by the upper wing plate (51), the lower wing plate (52), and the connecting post (53). The upper wing plate (51) is provided with a protrusion (56), and the protrusion (56) extends rearward from the connecting column (53) at a certain height to the rear end of the protrusion (56) in order to be inserted between the tape facing surfaces (26a, 26b) of a pair of zipper tapes (2a, 2b) to be opened and closed by the slider (5), and the protrusion (56) is provided in a manner spaced upward from the lower wing plate (52). When the length of the protrusion (56) is set to d1 and the distance between the connecting column (53) and the rear end of the slider (5) is set to d2, d1 / d2≤0.6 is satisfied. The protrusion (56) has a tapered rear end portion (56e) whose width becomes narrower toward the rear, and the angle formed by the center line (X5) of the slider (5) and the side surface of the rear end portion (56e) is greater than 45 degrees.

12. The slider according to claim 11, characterized in that: The slider (5) has a locking claw (60) provided with a claw end (60t) capable of protruding to the chain tooth passage of the slider (5) through a claw hole (51n) provided on the protruding strip (56).

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