puller

Abstract

To provide a slider in which a slider main body is difficult to abrade a fastener even if a sliding operation is repeated. A slider is provided in which a pair of upper front avoidance portions (25) are arranged at end portions on both sides of a shoulder port (18) of an upper wing plate (20, 20a), each upper front avoidance portion has an inclined surface that gradually increases a distance between the upper front avoidance portion and a center reference surface (50) toward the shoulder port (18), a pair of lower front avoidance portions (35) are arranged at end portions on both sides of the shoulder port (18) of a lower wing plate (30, 30a), each lower front avoidance portion has an inclined surface that gradually increases a distance between the lower front avoidance portion and the center reference surface (50) toward the shoulder port (18), and a depth (54) of the lower front avoidance portion (35) with respect to the center reference surface (50) is smaller than a depth (53) of the upper front avoidance portion (25) with respect to the center reference surface (50).

Description

Technical Field

[0001] This invention relates to the zipper pull used in zippers. Background Technology

[0002] As a type of zipper, such as as described in, for example, International Publication No. 2009 / 128136 (Patent Document 1), a zipper with a plurality of zipper teeth formed of metal and mounted on a zipper tape is known. Such zippers are sometimes referred to as metal zippers.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: International Publication No. 2009 / 128136 Summary of the Invention

[0006] In traditional metal zippers, the zipper head typically rubs against the metal zipper teeth as it slides. For example, when the zipper head is pulled and slid along the zipper tape, the zipper head and zipper teeth are prone to strong friction.

[0007] Therefore, due to repeated sliding operations of the zipper pull, the outer surface of the metal zipper teeth is sometimes partially worn away, exposing the metal portion inside the zipper teeth. As a result, on the outer surface of the zipper teeth, there is sometimes a difference in color and texture (the feel of metal) between the original portion and the exposed inner portion, leading to a decrease in the aesthetics of the zipper teeth and a reduction in the appearance quality of the metal zipper.

[0008] The present invention was made in view of the above-mentioned prior art problems, and its object is to provide a zipper pull that is difficult to cause wear on the zipper teeth by the zipper pull body even when repeatedly sliding.

[0009] To achieve the above objectives, the zipper pull provided by the present invention is a zipper pull with a zipper pull body, the zipper pull body having: an upper wing plate; a lower wing plate disposed separately from the upper wing plate; a connecting post connecting the front end of the upper wing plate and the front end of the lower wing plate; a pair of shoulder openings opening on the left and right sides of the connecting post; a rear opening opening at the rear end of the zipper pull body; and a zipper tooth guide formed between the upper wing plate and the lower wing plate and communicating the shoulder opening and the rear opening. In this zipper pull, the upper wing plate has a pair of upper front avoidance portions, which are provided on the inner surface portion of the upper wing plate opposite to the lower wing plate and disposed at the ends on the left and right shoulder opening sides, at the center of the vertical direction from the connecting post. When the imaginary plane through which the position passes and orthogonal to the vertical direction is defined as the central reference plane, each of the upper front avoidance portions has an inclined surface that gradually increases the vertical distance between the upper front avoidance portion and the central reference plane toward the shoulder opening. The lower wing plate has a pair of lower front avoidance portions, which are provided on the inner surface portion of the lower wing plate opposite to the upper wing plate and disposed at the left and right ends of the shoulder opening side. Each of the lower front avoidance portions has an inclined surface that gradually increases the vertical distance between the lower front avoidance portion and the central reference plane toward the shoulder opening. The depth of the lower front avoidance portion relative to the central reference plane is less than the depth of the upper front avoidance portion relative to the central reference plane.

[0010] In the slider of the present invention, it is preferable that the maximum vertical dimension of the lower front avoidance portion is smaller than the maximum vertical dimension of the upper front avoidance portion.

[0011] Preferably, the zipper head body has left and right upper flanges extending from the left and right side edges of the upper wing plate toward the lower wing plate, and left and right lower flanges extending from the left and right side edges of the lower wing plate toward the upper wing plate. The upper wing plate has a first upper reference inclined portion disposed between the upper front avoidance portion and the connecting post, and a second upper reference inclined portion disposed between the upper front avoidance portion and the upper flange. The first upper reference inclined portion and the second upper reference inclined portion each have an inclined surface that tilts such that the vertical distance between the first upper reference inclined portion or the second upper reference inclined portion and the central reference surface gradually increases toward the shoulder opening. The upper front avoidance portion has a horizontal surface relative to the first upper reference inclined portion and the connecting post. The second upper reference inclined portion is recessed in a manner that moves away from the central reference surface in the vertical direction. The lower wing plate has a first lower reference inclined portion located between the lower front avoidance portion and the connecting post, and a second lower reference inclined portion located between the lower front avoidance portion and the lower flange portion. The first lower reference inclined portion and the second lower reference inclined portion each have an inclined surface that tilts in a manner that gradually increases the vertical distance between the first lower reference inclined portion or the second lower reference inclined portion and the central reference surface toward the shoulder opening. The lower front avoidance portion has a portion that is recessed relative to the first lower reference inclined portion and the second lower reference inclined portion in a manner that moves away from the central reference surface in the vertical direction.

[0012] Furthermore, preferably, when viewed in cross-section along the vertical direction of the upper and lower wing plates, the inclined surfaces of the upper front avoidance portion and the lower front avoidance portion have different shapes.

[0013] Furthermore, preferably, the inclined surface of the upper front avoidance portion has a first upper front inclined surface and a second upper front inclined surface. In a cross-sectional view of the upper wing plate along the vertical direction and in the direction in which the inclined surface is inclined, the first upper front inclined surface is formed by a curved surface that is convex in a manner that bulges toward the lower wing plate, and the second upper front inclined surface is formed by a straight plane. The inclined surface of the lower front avoidance portion has a first lower front inclined surface, a second lower front inclined surface, and a third lower front inclined surface. In a cross-sectional view of the lower wing plate along the vertical direction and in the direction in which the inclined surface is inclined, the first lower front inclined surface is formed by a straight plane, the second lower front inclined surface is formed by a curved surface that is convex in a manner that bulges toward the upper wing plate, and the third lower front inclined surface is formed by a curved surface that is concave in a manner that moves away from the upper wing plate.

[0014] Furthermore, preferably, the upper wing plate has an upper main plane formed facing the chain tooth guide and parallel to the front-rear direction, and the boundary between the upper front avoidance portion and the upper main plane has a convex shape that bulges outward from the shoulder opening into the chain tooth guide. The lower wing plate has a lower main plane formed facing the chain tooth guide and parallel to the front-rear direction, and the boundary between the lower front avoidance portion and the lower main plane has a convex shape that bulges outward from the shoulder opening into the chain tooth guide.

[0015] In this invention, preferably, at least one of the upper wing plate and the lower wing plate has a rear avoidance portion, which is inclined such that the vertical distance between the inner surface of the upper wing plate or the lower wing plate and the central reference plane gradually decreases toward the rear opening.

[0016] In this case, preferably, the rear avoidance portion has: an upper rear avoidance portion provided on the upper wing plate; and a lower rear avoidance portion provided on the lower wing plate, wherein the upper rear avoidance portion and the lower rear avoidance portion have an symmetrical shape.

[0017] Furthermore, preferably, the zipper head body has at least one of left and right upper flange portions protruding from the left and right side edges of the upper wing plate toward the lower wing plate, and left and right lower flange portions protruding from the left and right side edges of the lower wing plate toward the upper wing plate. Each of the upper and lower flange portions has: a flange parallel portion with a constant interval between the left and right upper flange portions or between the left and right lower flange portions; and a flange curved portion with an interval that gradually increases forward in the direction of the left and right upper flange portions or between the left and right lower flange portions. When the area in the front-rear direction between the rear opening and the boundary position between the flange parallel portion and the flange curved portion is defined as the chain tooth engagement area, the rear avoidance portion is continuously provided in the front-rear direction within a range of more than 70% of the chain tooth engagement area.

[0018] Furthermore, preferably, the rear avoidance portion is formed as a curved surface that bends into a convex shape towards the chain tooth guide when viewed in a cross-sectional view orthogonal to the left and right directions.

[0019] In this invention, preferably, the shape of the inclined surface of the upper front avoidance portion when viewed in a cross section of the upper wing plate along the vertical direction and in the direction inclined to the inclined surface is different from the shape of the inclined surface of the rear avoidance portion when viewed in a cross section orthogonal to the left and right direction; similarly, the shape of the inclined surface of the lower front avoidance portion when viewed in a cross section of the lower wing plate along the vertical direction and in the direction inclined to the inclined surface is different from the shape of the inclined surface of the rear avoidance portion when viewed in a cross section orthogonal to the left and right direction.

[0020] Furthermore, preferably, the rear avoidance portion is configured such that when the zipper pull is mounted on the teeth of a pair of zipper teeth, it can contact the left and right teeth in an engaged state. When the left and right teeth are in contact, the rear avoidance portion always has a first contact portion that contacts one of the zipper teeth of the teeth in one of the teeth that are engaged, and a second contact portion that contacts one of the zipper teeth of the teeth in the other of the teeth that are engaged. The surface between the first contact portion and the second contact portion in the rear avoidance portion is formed as a convex curved surface.

[0021] Furthermore, preferably, when the zipper head is mounted onto the tooth rows of a pair of zipper teeth, the front-to-back dimension of the rear avoidance portion is larger than the spacing between the zipper teeth arranged adjacent to each other in one of the tooth rows.

[0022] Invention Effects

[0023] According to the present invention, even with repeated sliding operations, it is difficult for the inner surface of the zipper head to grind the zipper teeth. Attached Figure Description

[0024] Figure 1 This is a perspective view of the pull head of Embodiment 1 of the present invention, viewed from an oblique upper side.

[0025] Figure 2 Viewed from the lower side Figure 1 The diagram shown is a 3D representation of the zipper pull.

[0026] Figure 3 yes Figure 1 The side view of the pull head shown.

[0027] Figure 4 Viewed from below Figure 1 The diagram shows a cross-sectional view of the upper flange of the pull head.

[0028] Figure 5 Viewed from above Figure 1The diagram shows a cross-sectional view of the lower flange of the pull head.

[0029] Figure 6 yes Figure 4 The cross-sectional view of the upper wing plate at line VI-VI is shown.

[0030] Figure 7 yes Figure 5 The cross-sectional view of the lower wing shown at line VII-VII.

[0031] Figure 8 It is an illustrative explanation Figure 1 The diagram shows a cross-sectional view of the zipper pull and zipper teeth when the zipper pull is installed on the zipper chain.

[0032] Figure 9 It is an illustrative explanation Figure 1 The diagram illustrates the relationship between the rear clearance of the zipper pull and the zipper teeth when the zipper pull is installed on the zipper chain.

[0033] Figure 10 It is Figure 9 The enlarged cross-sectional view of the rear avoidance section and zipper teeth is shown.

[0034] Figure 11 This is an illustrative diagram illustrating the relationship between the zipper teeth and the zipper pull when the zipper tape is bent in the direction of the tape's back.

[0035] Figure 12 This is a cross-sectional view of the upper wing plate of the pull head in Embodiment 2 of the present invention, viewed from below.

[0036] Figure 13 Viewed from above Figure 12 The diagram shows a cross-sectional view of the lower flange of the pull head.

[0037] Explanation of reference numerals in the attached figures

[0038] 1, 2: Pull tabs

[0039] 5: Chain teeth

[0040] 6: Zipper teeth

[0041] 6a: Chain tooth head

[0042] 6b: Chain teeth leg

[0043] 10, 10a: Sliding head body

[0044] 11: Connecting Post

[0045] 12: Upper flange

[0046] 13: Lower flange portion

[0047] 14: Tape Installation Section

[0048] 16a: Parallel portion of the flange

[0049] 16b: Flange bend

[0050] 17: Boundary Location

[0051] 18: Shoulder mouth

[0052] 19: Back Mouth

[0053] 20, 20a: Upper wing panel

[0054] 21, 21a: Inner surface of the upper wing plate (upper chain tooth guide surface)

[0055] 22: Outer surface of the upper wing (upper surface of the upper wing)

[0056] 23: Outer circumference of the upper wing plate

[0057] 24, 24a: Upper principal plane

[0058] 25: Upper front avoidance part

[0059] 25a: First upper front inclined surface

[0060] 25b: Second upper anterior inclined surface

[0061] 25c: Midpoint

[0062] 26: Upper reference inclined part

[0063] 26a: First upper reference inclined part

[0064] 26b: Second upper reference inclined part

[0065] 27: Upper rear avoidance section

[0066] 28a: First boundary section

[0067] 28b: Second boundary section

[0068] 29: First containment layer difference

[0069] 29a: First bottom surface

[0070] 29b: First connecting section

[0071] 30, 30a: Lower wing plate

[0072] 31, 31a: Inner surface of the lower flange (lower chain tooth guide surface)

[0073] 32: Outer surface of the lower wingplate (lower surface of the lower wingplate)

[0074] 33: Outer circumference of the lower wing plate

[0075] 34, 34a: Lower principal plane

[0076] 35: Lower front avoidance section

[0077] 35a: First lower front inclined surface

[0078] 35b: Second lower anterior inclined surface

[0079] 35c: Third lower anterior inclined surface

[0080] 35d: Midpoint

[0081] 36: Lower reference inclined part

[0082] 36a: First lower reference inclined part

[0083] 36b: Second lower reference inclined part

[0084] 37: Lower rear avoidance section

[0085] 38a: First boundary section

[0086] 38b: Second boundary section

[0087] 39: Second containment layer difference

[0088] 39a: Second bottom surface

[0089] 39b: Second connecting section

[0090] 40: Imaginary baseline

[0091] 4: Imaginary top connecting line

[0092] 46: First contact part

[0093] 47: Second contact part

[0094] 50: Central reference plane

[0095] 51: The vertical distance between the upper front avoidance section and the central reference plane.

[0096] 52: Vertical spacing between the lower front avoidance section and the central reference plane.

[0097] 53: Depth of the upper front avoidance section relative to the center reference plane

[0098] 54: Depth of the lower front avoidance section relative to the center reference plane

[0099] D1: Dimensions of the upper or lower rear clearance section along the front-to-back direction

[0100] D2: Spacing between zipper teeth

[0101] T1: Maximum dimension in the thickness direction at the upper front avoidance section

[0102] T2: Maximum dimension in the thickness direction at the lower front avoidance section.

[0103] θ1: Upper side avoidance tilt angle

[0104] θ2: Lower side avoidance tilt angle Detailed Implementation

[0105] The preferred embodiments of the present invention are described below with reference to the accompanying drawings.

[0106] Example 1

[0107] Figure 1 This is a schematic perspective view of the zipper pull of Embodiment 1 when viewed from an obliquely upward side. Figure 2 This is a perspective view of the slider in Embodiment 1 as seen from a lower oblique angle. Figure 3 This is a side view of the pull head of Embodiment 1. Figure 4 and Figure 5 These are cross-sectional views of the upper and lower wing plates of the pull head in Embodiment 1.

[0108] In the following description of the zipper pull 1 and the zipper, the forward and backward direction refers to the length direction of the zipper pull 1, and the sliding direction refers to the direction in which the zipper pull 1 slides along the zipper teeth 5. In this case, the direction in which the zipper pull 1 moves to engage the zipper teeth 5 is defined as forward (shoulder side direction), and the direction in which the zipper pull 1 moves to disengage the zipper teeth 5 is defined as backward (rear side direction).

[0109] The vertical direction refers to the height direction of the slider 1, which is, for example, the direction orthogonal to the upper wing plate 20 and lower wing plate 30 (described later) of the slider body 10, or the direction along the connecting post 11 (described later) of the slider body 10. In this case, the direction in which the slider body 10, which is used to install the pull tab (not shown), is set to the upward direction, and the opposite direction is set to the downward direction.

[0110] The left and right directions are the width direction of the slider 1, which is orthogonal to the length and height directions of the slider 1.

[0111] The zipper pull 1 of this embodiment 1 is used for a zipper (not shown) having a pair of left and right zipper tooth belts (not shown) with multiple zipper teeth 6 mounted on the zipper belt (not shown). The zipper pull 1 is mounted on the tooth row 5 of each zipper tooth belt. The zipper pull 1 can slide along the tooth row 5 in the direction of engaging the zipper teeth 6 (forward) and in the direction of disengaging the zipper teeth 6 (rearward).

[0112] Each zipper belt on the left and right sides has a woven, thin strip of zipper tape and multiple metal zipper teeth 6 mounted on opposite side edges of the zipper tape. Each zipper tooth 6 is, for example, as shown in... Figures 8-10 As shown, the zipper has a tooth head 6a with an engaging protrusion and an engaging recess, and a pair of tooth legs 6b that split into two strands extending in the left-right direction from the tooth head 6a. A row of teeth 5 is continuously formed along the length of the zipper belt by means of a plurality of zipper teeth 6 installed on the zipper belt.

[0113] The slider 1 in this embodiment 1 is formed by two parts: a slider body 10 and a slider tab (not shown). The slider body 10 is manufactured by die-casting a metal material such as aluminum alloy or zinc alloy. It should be noted that the material and manufacturing method of the slider body 10 are not particularly limited in this invention.

[0114] The pull tab (not shown) can be the same type of pull tab that has been commonly used in the past. For example, the pull tab has a pull tab main body that serves as a gripping part, a pair of left and right arms extending from one end of the pull tab main body, and a mounting shaft that connects the top ends of the arms. It should be noted that in this invention, the shape, structure, size, etc., of the pull tab are not particularly limited.

[0115] The zipper head body 10 of this embodiment has a shape that is symmetrical about the left and right sides with respect to the center plane of the zipper head body 10 in the left and right direction. The zipper head body 10 has: an upper wing plate 20; a lower wing plate 30 disposed separately from the upper wing plate 20; a connecting post 11 connecting the front end of the upper wing plate 20 and the front end of the lower wing plate 30; left and right upper flange portions 12 disposed on the left and right side edges of the upper wing plate 20 and extending toward the lower wing plate 30; left and right lower flange portions 13 disposed on the left and right side edges of the lower wing plate 30 and extending toward the upper wing plate 20; and a zipper tab mounting portion 14 that stands upright from the upper surface of the upper wing plate 20 and extends in the front and back direction.

[0116] The upper flange portion 12 of the slider body 10 has: a flange parallel portion 16a that extends in the front-rear direction in such a way that the interval between the left and right upper flange portions 12 is a constant size; and a flange curved portion 16b that extends forward from the front end of the flange parallel portion 16a, and the interval between the left and right upper flange portions 12 gradually increases forward (see reference). Figure 4 ).

[0117] The lower flange portion 13, like the upper flange portion 12, has: a flange parallel portion 16a that extends in the front-rear direction in such a way that the interval between the left and right lower flange portions 13 is a constant size; and a flange curved portion 16b that extends forward from the front end of the flange parallel portion 16a, and the interval between the left and right lower flange portions 13 gradually increases forward (see reference). Figure 5Furthermore, the interval between the left and right upper flange portions 12 and the interval between the left and right lower flange portions 13 refer to the distance along the left and right direction between the inner surfaces of the flanges of the left and right upper flange portions 12 or the left and right lower flange portions 13.

[0118] The aforementioned pull tab (not shown) is installed on the pull tab mounting portion 14 of the zipper head body 10. A pair of shoulder openings 18 are formed at the front end of the zipper head body 10, opening on both sides of the connecting post 11. A rear opening 19 is formed at the rear end of the zipper head body 10, surrounded by an upper flange 20, a lower flange 30, left and right upper flange portions 12, and left and right lower flange portions 13, and opening towards the rear. A Y-shaped tooth guide is formed between the upper flange 20 and the lower flange 30, connecting the left and right shoulder openings 18 and the rear opening 19. On the left and right side edges of the zipper head body 10, between the upper flange portion 12 and the lower flange portion 13, a zipper tape (not shown) is formed for the zipper tape to pass through. The tape tape gap communicates with the tooth guide.

[0119] The inner surface of the zipper head body 10 has a tooth guide surface facing the tooth guide path of the zipper head body 10. The tooth guide surface is used to guide the movement of the zipper teeth 6 inside the zipper head body 10. The tooth guide surface has an upper wing inner surface (upper tooth guide surface) 21 provided on the upper wing plate 20, a lower wing inner surface (lower tooth guide surface) 31 provided on the lower wing plate 30, the flange inner surfaces of the left and right upper flange portions 12, and the flange inner surfaces of the left and right lower flange portions 13.

[0120] The upper wing plate 20 is provided with: an outer surface (upper upper surface of the upper wing plate) 22, which is disposed on the opposite side of the inner surface 21 of the upper wing plate and faces upward; and an outer peripheral surface 23, which is disposed along the outer periphery of the upper wing plate 20 and is continuous with the outer surface 22 and the inner surface 21 of the upper wing plate. The lower wing plate 30 is provided with: an outer surface (lower surface of the lower wing plate) 32, which is disposed on the opposite side of the inner surface 31 of the lower wing plate and faces downward; and an outer peripheral surface 33, which is disposed along the outer periphery of the lower wing plate 30 and is continuous with the outer surface 32 and the inner surface 31 of the lower wing plate. The outer peripheral surfaces 23 of the upper wing plate and 33 of the lower wing plate are arranged in a direction orthogonal to the vertical direction.

[0121] For example, Figure 2 and Figure 4 As shown, the inner surface 21 of the upper wing plate has: an upper main plane 24, which is formed parallel to the front-rear direction; a pair of upper front avoidance portions 25, which are provided at the ends of the left and right shoulder openings 18; an upper reference inclined portion 26, which is provided on both sides of each upper front avoidance portion 25; and an upper rear avoidance portion 27, which is provided at the rear end of the portion (inner surface portion) on the inner surface 21 of the upper wing plate (end on the rear opening 19 side).

[0122] Furthermore, in this invention, the ends on the shoulder opening 18 side of the inner surface 21 of the upper wing plate and the inner surface 31 of the lower wing plate (sometimes referred to as shoulder opening side ends) are the portions of the upper wing plate 20 or the lower wing plate 30 extending inward from the shoulder opening 18 toward the inner side of the slider body 10. Additionally, the shoulder opening side ends can also be defined as the portion of the inner surface 21 of the upper wing plate or the inner surface 31 of the lower wing plate adjacent to the shoulder opening 18 and the surrounding area. The ends on the rear opening 19 side of the inner surface 21 of the upper wing plate and the inner surface 31 of the lower wing plate (sometimes referred to as rear opening side ends) are the portions of the upper wing plate 20 and the lower wing plate 30 extending inward from the rear opening 19 toward the slider body 10. Additionally, the rear opening side ends can also be defined as the portion of the inner surface 21 of the upper wing plate and the inner surface 31 of the lower wing plate adjacent to the rear opening 19 and the surrounding area.

[0123] The upper principal plane 24 of the upper wing 20 is formed by a flat surface orthogonally arranged to the vertical direction. When viewing the inner surface 21 of the upper wing from below (refer to...) Figure 4 The upper main plane 24 is surrounded by the connecting column 11, the left and right upper flange portions 12, the left and right upper front avoidance portions 25, multiple upper reference inclined portions 26 and upper rear avoidance portions 27.

[0124] The upper front avoidance portion 25 is disposed on the left and right shoulder ends of the portion (inner surface portion) on the inner surface 21 side of the upper wing plate 20, and is formed to prevent at least a portion of the zipper teeth 6 from contacting each other. The left and right upper front avoidance portions 25 have a shape that is symmetrical to each other.

[0125] In the pull head body 10, an imaginary plane that passes through the center of the connecting column 11 in the vertical direction and is orthogonal to the vertical direction is defined as the center reference plane 50 (refer to...). Figure 3 In this case, each of the upper front avoidance portions 25 on the left and right sides has an inclined surface, which makes the vertical distance 51 between the upper front avoidance portion 25 and the central reference plane 50 (see reference). Figure 3 The upper wing plate 20 is inclined in a manner that gradually increases towards the shoulder opening 18. Furthermore, the inclined surface of the upper front avoidance portion 25 in this embodiment 1 can also be described as inclined in a manner that decreases the thickness of the upper wing plate 20 towards the shoulder opening 18. Here, the thickness of the upper wing plate 20 refers to the vertical dimension between the inner surface 21 and the outer surface 22 of the upper wing plate.

[0126] For example, in this embodiment 1, the inclined surface of the upper front avoidance portion 25 has a first upper front inclined surface 25a and a second upper front inclined surface 25b. When observing the upper wing plate 20... Figure 4 When referring to the cross section at line VI-VI shown (refer to...) Figure 6The first upper front inclined surface 25a is formed by a curved surface that bulges outward toward the lower wing plate 30, and the second upper front inclined surface 25b is formed by a straight plane. The first upper front inclined surface 25a is located in a portion closer to the shoulder opening 18 than the second upper front inclined surface 25b.

[0127] Here, Figure 4 The VI-VI line shown can also be described as an imaginary reference line 40 that runs vertically and inclines along the inclined surface of the upper front avoidance portion 25 (in other words, the direction in which the thickness of the upper wing plate 20 decreases). Furthermore, the imaginary reference line 40 of the upper wing plate 20 in this embodiment 1 is a straight line, for example, when the upper wing plate 20 is viewed from below (…). Figure 4 When the imaginary top connecting line 41 is defined as the straight line formed by imaginarily connecting the left and right side edges of the top part near the shoulder opening 18 of the upper front avoidance part 25, the imaginary top connecting line 41 is a straight line that passes through the midpoint of the imaginary top connecting line 41 and is orthogonal to the imaginary top connecting line 41. In addition, the imaginary reference line 40 of the upper wing plate 20 may also be formed, for example, by a straight line inclined at a predetermined angle within the range of 30° to 45° with respect to the left and right direction.

[0128] By having the aforementioned inclined surface on the upper front avoidance portion 25, when the zipper tooth 6 enters the tooth guide path from the shoulder opening 18, it is possible to prevent the zipper tooth 6 from hooking onto the upper front avoidance portion 25 and to prevent the zipper tooth 6 from tilting in an inappropriate posture. Furthermore, in this invention, the inclined surface of the upper front avoidance portion 25 may be formed by at least one of a curved surface that is bent in a downward convex manner and a straight plane.

[0129] The inclined surface of the upper front avoidance portion 25 is formed as a curved surface, that is, in a cross-sectional view (not shown) in which the upper wing plate 20 is cut parallel to the vertical direction using the above-mentioned imaginary top connecting line 41, the central part of the upper front avoidance portion 25 bulges out toward the lower wing plate 30 in a convex shape.

[0130] Here, the dimension in the thickness direction (vertical direction) from the position of the first boundary 28a between the inclined surface of the upper front avoidance portion 25 and the outer peripheral surface 23 of the upper wing plate to the position of the upper main plane 24 is defined as the maximum dimension T1 in the thickness direction of the upper front avoidance portion 25 (refer to...). Figure 6 The maximum value of the thickness direction (vertical direction) of the upper wing plate 20 from the outer surface 22 of the upper wing plate to the inner surface 21 of the upper wing plate is defined as the maximum thickness direction dimension of the upper wing plate 20.

[0131] Furthermore, the first boundary portion 28a between the inclined surface of the upper front avoidance portion 25 and the outer peripheral surface 23 of the upper wing plate is continuously provided from the boundary portion between the upper reference inclined portion 26 and the outer peripheral surface 23 of the upper wing plate. In other words, although the upper front avoidance portion 25 and the upper reference inclined portion 26 are formed with different shapes for the inner surface 21 of the upper wing plate, the outer peripheral surface 23 of the upper wing plate continuously formed from the upper front avoidance portion 25 and the outer peripheral surface 23 of the upper wing plate continuously formed from the upper reference inclined portion 26 are smoothly continuous. Therefore, by comparing the shapes of the upper front avoidance portion 25, the upper reference inclined portion 26, and the outer peripheral surface 23 of the upper wing plate, it is easy to identify the first boundary portion 28a between the inclined surface of the upper front avoidance portion 25 and the outer peripheral surface 23 of the upper wing plate, and the boundary portion between the inclined surface of the upper reference inclined portion 26 and the outer peripheral surface 23 of the upper wing plate.

[0132] Alternatively, in this embodiment 1, when observing the cross-section at, for example, the imaginary reference line 40 of the upper wing plate 20 (refer to...) Figure 6 In the curved surface that bends from the outer peripheral surface 23 of the upper wing plate to the outer surface of the upper wing plate (upper surface of the upper wing plate) 22, when the position where the tangent of the curved surface forms a predetermined angle (e.g., 30°) with respect to the vertical direction is defined as the auxiliary boundary position, the position on the surface of the upper wing plate 20 directly below the auxiliary boundary position is identified as the first boundary 28a between the inclined surface of the upper reference inclined portion 26 and the outer peripheral surface 33 of the lower wing plate.

[0133] In this embodiment 1, the maximum dimension T1 in the thickness direction of the upper front avoidance portion 25 is set to be 25% to 75% of the maximum dimension in the thickness direction of the upper wing plate 20, preferably 35% to 60% of the maximum dimension in the thickness direction of the upper wing plate 20. By making the maximum dimension T1 of the upper front avoidance portion 25 25% or more of the maximum dimension in the thickness direction of the upper wing plate 20, when the zipper pull 1 slides relative to the zipper tooth row 5 as described later, it is difficult to grind the zipper teeth 6 through the shoulder side end of the inner surface 21 of the upper wing plate.

[0134] By ensuring that the maximum dimension T1 of the upper front avoidance portion 25 is less than 75% of the maximum dimension in the thickness direction of the upper wing plate 20, the strength of the shoulder end of the upper wing plate 20 can be properly ensured. Furthermore, for example, when the zipper pull 1 slides relative to the zipper tooth row 5 in the tooth engagement direction (forward), it is possible to prevent the zipper teeth 6 from hooking onto the upper front avoidance portion 25, and to facilitate the zipper teeth 6 entering the tooth guide path of the zipper pull body 10 in an appropriate posture.

[0135] The upper front avoidance portion 25 is smoothly continuous with respect to the upper main plane 24 of the upper wing plate 20, and no layer difference or unevenness is provided between the upper front avoidance portion 25 and the upper main plane 24. Between the upper front avoidance portion 25 and the upper main plane 24 in the inner surface 21 of the upper wing plate, for example... Figure 4 As shown, the second boundary portion 28b that divides the upper front avoidance portion 25 and the upper main plane 24 is configured in a convex shape that bulges out in the direction of entering the chain tooth guide path from the shoulder opening 18.

[0136] In other words, the second boundary portion 28b is provided in a convex shape that bends toward the connecting post 11 (especially toward the rear end of the connecting post 11), or in a convex shape that bends toward the confluence portion where the two chain tooth guides facing left and right merge into one on the rear side of the connecting post 11.

[0137] By providing the upper front avoidance portion 25 with the aforementioned curved shape at the second boundary portion 28b of the upper wing plate 20, the upper wing plate 20 can ensure adequate strength. Furthermore, the upper front avoidance portion 25 can be stably provided at an appropriate size to prevent contact between the zipper teeth 6 and the upper wing plate 20.

[0138] In this case, the second boundary portion 28b of the upper wing plate 20 is separated from the connecting post 11. Furthermore, the second boundary portion 28b is formed in the longitudinal direction within the range of the connecting post 11 where the dimensions of the connecting post 11 gradually decrease rearward in the lateral direction. Moreover, the range of the gradually decreasing portion in the longitudinal direction is the range from the boundary position of the portion where the dimensions of the connecting post 11 gradually increase rearward in the lateral direction and the portion that gradually decreases rearward, to the rear end position of the connecting post 11 (the position of the connecting post 11 closest to the rear opening 19).

[0139] Upper reference inclined portions 26 are provided on the left and right sides of the upper front avoidance portion 25. The upper reference inclined portions 26 are inclined in such a way that the vertical distance between the inner surface 21 of the upper wing plate and the central reference surface 50 gradually increases toward the shoulder opening 18. In this case, the inclined surface 26 of the upper reference inclined portion is inclined in such a way that the thickness of the upper wing plate 20 gradually decreases toward the shoulder opening 18.

[0140] The upper front avoidance portion 25 is separated from the connecting post 11 and the upper flange portion 12 by the provision of the upper reference inclined portion 26. Furthermore, the inclined surface of the upper front avoidance portion 25 has a portion that is recessed relative to the two adjacent upper reference inclined portions 26 in a manner that moves away from the central reference surface 50 in the upward and downward direction. That is, the inclined surface of the upper front avoidance portion 25 is formed to be recessed upwards compared to the two adjacent upper reference inclined portions 26 on both sides.

[0141] The upper front avoidance portion 25 has the shape described above and has a portion recessed relative to the upper reference inclined portion 26 on the left and right sides. Therefore, for example, when the zipper tooth 6 moves within the tooth guide path of the zipper head body 10 while in contact with the inner surface 21 of the upper wing plate, the tooth head 6a and / or tooth leg 6b of the zipper tooth 6 can stably contact at least one of the upper reference inclined portion 26. Furthermore, at least a portion of the zipper tooth 6 can be separated from the upper front avoidance portion 25.

[0142] Therefore, when the zipper pull 1 slides, within the zipper tooth guide path of the zipper pull body 10, the zipper tooth 6 can be maintained in an appropriate posture using the upper reference inclined portion 26 while moving forward or backward. Simultaneously, at least a portion of the zipper tooth 6 can be made non-contact with the upper front avoidance portion 25 of the upper wing plate 20. That is, a non-contact portion that does not contact the inner surface 21 of the upper wing plate can be formed at least a portion of the zipper tooth 6. Furthermore, when the zipper pull 1 slides, depending on the position and posture of the zipper tooth 6, sometimes a portion of the zipper tooth 6 may partially contact the inclined surface of the upper front avoidance portion 25, but even in this case, at least a portion of the zipper tooth 6 does not contact the inclined surface of the upper front avoidance portion 25.

[0143] The upper reference inclined portion 26 of this embodiment 1 has: a first upper reference inclined portion 26a provided between the upper front avoidance portion 25 and the connecting post 11; and a second upper reference inclined portion 26b provided between the upper front avoidance portion 25 and the upper flange portion 12. Each upper reference inclined portion 26 is inclined such that the vertical distance between the inner surface 21 of the upper wing plate and the central reference surface 50 gradually increases toward the shoulder opening 18. The upper reference inclined portion 26 is formed to bulge downward or protrude downward compared to the upper front avoidance portion 25, approaching the lower wing plate 30. The upper reference inclined portion 26 is formed smoothly and continuously with the upper main plane 24.

[0144] The upper rearward avoidance portion 27 of the upper wing plate 20 is provided at the end of the portion on the rear opening 19 side of the inner surface 21 side of the upper wing plate. The upper rearward avoidance portion 27 has a shape such that, when observing a cross section of the upper wing plate 20 orthogonal to the left and right directions (for example, referring to...), Figure 9 The upper rearward avoidance portion 27 is inclined in such a way that the vertical distance between the inner surface 21 of the upper wing plate and the central reference surface 50 gradually increases toward the rear opening 19. In other words, the upper rearward avoidance portion 27 is inclined in such a way that the thickness of the upper wing plate 20 gradually decreases toward the rear opening 19.

[0145] Furthermore, the inclined surface of the upper rear avoidance portion 27 is formed by a curved surface such that, when observing the cross-section of the upper wing plate 20 orthogonal to the left and right directions, it is curved in a convex manner, bulging towards the lower wing plate 30 (or towards the chain guide). In particular, in this embodiment 1, the inclined surface of the upper rear avoidance portion 27 is formed as a convex curved surface throughout the entire front-rear direction of the upper rear avoidance portion 27.

[0146] In the upper wing plate 20 of this embodiment, in order to cope with the different contact patterns of the zipper teeth 6 with the inner surface 21 of the upper wing plate when the zipper pull 1 slides forward or backward, the inclined surface of the upper front avoidance portion 25 is observed when the upper wing plate 20 is cut with an imaginary reference line 40. Figure 6 ), and the inclined surface of the upper rear avoidance portion 27 when observing the cross-section obtained by cutting the upper wing plate 20 in a direction orthogonal to the left and right directions (refer to Figure 9 They have different shapes.

[0147] By forming the inclined surfaces of the upper front avoidance portion 25 and the upper rear avoidance portion 27 with different shapes, whether the zipper teeth 6 are in contact with the shoulder end of the upper wing plate 20 while moving, or the zipper teeth 6 are in contact with the rear end of the upper wing plate 20 while moving, different methods can be used to prevent or suppress the zipper teeth 6 from being strongly rubbed by the upper wing plate 20, making it difficult to grind the zipper teeth 6.

[0148] Furthermore, in this embodiment 1, when viewing the inner surface 21 of the upper wing plate from below (refer to...) Figure 4 The upper rear avoidance portion 27 is provided in the area of ​​the upper flange portion 12 on the left and right sides, from the boundary position 17 between the flange parallel portion 16a and the flange curved portion 16b to the position of the rear opening 19.

[0149] Here, the area in the front-rear direction between the rear opening 19 of the slider body 10 and the boundary position 17 between the parallel flange portion 16a and the curved flange portion 16b is defined as the chain tooth engagement area. In this case, the upper rear avoidance portion 27 of this embodiment 1 is continuously provided in the front-rear direction within a range of 70% to 100% of the chain tooth engagement area.

[0150] By providing the upper rear avoidance portion 27 within 70% or more of the zipper tooth engagement area, the two zipper teeth 6 can contact the upper rear avoidance portion 27, thus effectively preventing or suppressing the zipper teeth 6 from being strongly rubbed by the upper wing plate 20. Furthermore, the upper rear avoidance portion 27 is easily formed with a gentle incline. By providing the upper rear avoidance portion 27 within less than 100% of the zipper tooth engagement area, as described later, the left and right zipper teeth 6 can stably engage within a range in the zipper tooth guide path that is forward of the upper rear avoidance portion 27. In this embodiment 1, it is preferable that the upper rear avoidance portion 27 is continuously formed in the front-rear direction from the rear opening 19 of the zipper head body 10 to the boundary position 17 between the parallel flange portion 16a and the curved flange portion 16b.

[0151] The inner surface 31 of the lower wing 30 is, for example Figure 1 and Figure 5 As shown, it has: a lower main plane 34, which is formed parallel to the front-rear direction; a pair of lower front avoidance portions 35, which are provided at the ends of the left and right shoulder openings 18; a lower reference inclined portion 36, which is provided on both sides of each lower front avoidance portion 35; and a lower rear avoidance portion 37, which is provided at the rear end of the portion (inner surface portion) on the inner surface 31 side of the lower wing plate.

[0152] The lower principal plane 34 of the lower wing 30 is formed by a flat surface orthogonal to the vertical direction. The lower principal plane 34 is arranged parallel to the upper principal plane 24 of the upper wing 20. When viewing the inner surface 31 of the lower wing from above (refer to...) Figure 5 The lower main plane 34 is surrounded by the connecting column 11, the left and right lower flange portions 13, the left and right lower front avoidance portions 35, multiple lower reference inclined portions 36 and lower rear avoidance portions 37.

[0153] The lower front avoidance portion 35 is disposed on the left and right shoulder-side ends of the portion (inner surface portion) on the inner surface 31 side of the lower wing plate 30, and is further formed to prevent at least a portion of the zipper teeth 6 from contacting each other. The left and right lower front avoidance portions 35 have a shape that is symmetrical to each other. Each lower front avoidance portion 35 has a vertical spacing 52 between the lower front avoidance portion 35 and the central reference plane 50 (see reference). Figure 3 The lower wing plate 30 is inclined in a manner that gradually increases towards the shoulder opening 18. In other words, the lower front avoidance portion 35 is inclined in a manner that causes the thickness of the lower wing plate 30 to gradually decrease towards the shoulder opening 18. Here, the thickness of the lower wing plate 30 refers to the vertical dimension between the inner surface 31 and the outer surface 32 of the lower wing plate.

[0154] The inclined surface of the lower front avoidance portion 35 has a first lower front inclined surface 35a, a second lower front inclined surface 35b, and a third lower front inclined surface 35c. When observing the lower wing plate 30... Figure 5When the cross section at line VII-VII (imaginary baseline 40) is shown (refer to...) Figure 7 The first lower front inclined surface 35a is formed by a straight plane, the second lower front inclined surface 35b is formed by a curved surface that bulges outward toward the upper wing plate 20, and the third lower front inclined surface 35c is formed by a curved surface that bulges outward toward the upper wing plate 20. In this case, the first lower front inclined surface 35a is located in a portion closer to the shoulder opening 18 than the second lower front inclined surface 35b, and the second lower front inclined surface 35b is located in a portion closer to the shoulder opening 18 than the third lower front inclined surface 35c.

[0155] Furthermore, for example, if the straight line formed by imaginarily connecting the left and right side edges of the top portion near the shoulder opening 18 of the lower front avoidance portion 35 is defined as the imaginary top connecting line 41, then the imaginary reference line 40 of the lower wing plate 30 in this embodiment 1 is a straight line that passes through the midpoint of the imaginary top connecting line 41 and is orthogonal to the imaginary top connecting line 41. Alternatively, the imaginary reference line 40 of the lower wing plate 30 can also be formed by a straight line inclined, for example, at a predetermined angle within the range of 30° to 45° relative to the left and right direction. Preferably, the slider body 10 of this embodiment 1 is configured such that the inclination angle of the imaginary reference line 40 in the upper wing plate 20 relative to the left and right direction is the same as the inclination angle of the imaginary reference line 40 in the lower wing plate 30 relative to the left and right direction.

[0156] By giving the lower front avoidance portion 35 the aforementioned inclined surface, when the zipper tooth 6 enters the tooth guide path from the shoulder opening 18, it is possible to prevent the zipper tooth 6 from hooking onto the lower front avoidance portion 35 and to prevent the zipper tooth 6 from tilting in an inappropriate posture. Furthermore, in this invention, the inclined surface of the lower front avoidance portion 35 may be formed by including at least one of a curved surface that is convex upward, a curved surface that is concave downward, and a straight plane.

[0157] In a cross-sectional view (not shown) of the lower wing plate 30 cut parallel to the vertical direction along the imaginary top connecting line 41 described above, the inclined surface of the lower front avoidance portion 35 is formed as a gently curved surface (curved surface) that bulges out from the center of the inclined surface toward the upper wing plate 20.

[0158] Regarding the upper front avoidance portion 25 and the lower front avoidance portion 35 of the slider body 10, the depth 54 of the lower front avoidance portion 35 relative to the central reference plane 50 is set to be less than the depth 53 of the upper front avoidance portion 25 relative to the central reference plane 50 (refer to...). Figure 3Here, the depth 53 of the upper front avoidance portion 25 relative to the central reference surface 50 is represented by the difference between the maximum and minimum values ​​of the vertical distance 51 between the upper front avoidance portion 25 and the central reference surface 50, and is equivalent to the aforementioned maximum dimension T1. In this embodiment 1, the maximum value of the vertical distance 51 between the upper front avoidance portion 25 and the central reference surface 50 is the size of the vertical distance 51 at the position of the first boundary portion 28a. The minimum value of the vertical distance 51 between the upper front avoidance portion 25 and the central reference surface 50 is the size of the vertical distance 51 at the position of the second boundary portion 28b.

[0159] The depth 54 of the lower front avoidance portion 35 relative to the central reference plane 50 is represented by the difference between the maximum and minimum values ​​of the vertical distance 52 between the lower front avoidance portion 35 and the central reference plane 50, and is also equivalent to the maximum dimension T2 described later. In this embodiment 1, the maximum value of the vertical distance 52 between the lower front avoidance portion 35 and the central reference plane 50 is the size of the vertical distance 52 at the position of the first boundary portion 38a between the inclined surface of the lower front avoidance portion 35 and the outer peripheral surface 33 of the lower wing plate. The minimum value of the vertical distance 52 between the lower front avoidance portion 35 and the central reference plane 50 is the size of the vertical distance 52 at the position of the second boundary portion 38b that divides the lower front avoidance portion 35 and the lower main plane 34.

[0160] By setting the depth 54 of the lower front avoidance portion 35 relative to the central reference surface 50 to be less than the depth 53 of the upper front avoidance portion 25 relative to the central reference surface 50, when the zipper pull 1 of this embodiment 1 is mounted on, for example, a zipper tooth row 5 that is bent in the direction of the zipper tape back and slides along the zipper tooth row 5 as described later (see reference 1) Figure 11 This effectively prevents or inhibits the zipper teeth 6 from being ground by the lower flange 30 of the zipper head body 10. In addition, it makes it difficult for the zipper tape to be damaged by the lower flange 13 of the zipper head body 10.

[0161] Furthermore, the dimension in the thickness direction (vertical direction) from the position of the first boundary portion 38a between the inclined surface of the lower front avoidance portion 35 and the outer peripheral surface 33 of the lower wing plate to the position of the lower main plane 34 is defined as the maximum dimension T2 in the thickness direction of the lower front avoidance portion 35 (refer to...). Figure 7The first boundary portion 38a between the inclined surface of the lower front avoidance portion 35 and the outer peripheral surface 33 of the lower wing plate is continuously provided from the boundary portion between the lower reference inclined portion 36 and the outer peripheral surface 33 of the lower wing plate. That is, the first boundary portion 38a between the inclined surface of the lower front avoidance portion 35 and the outer peripheral surface 33 of the lower wing plate is similar to that of the upper front avoidance portion 25, and can be easily identified by comparing the shapes of the lower front avoidance portion 35, the lower reference inclined portion 36, and the outer peripheral surface 33 of the lower wing plate.

[0162] Furthermore, in this embodiment 1, it is also possible, for example, when observing the cross-section at the imaginary reference line 40 of the lower wing 30 (refer to...) Figure 7 In the curved surface that bends from the outer peripheral surface 33 of the lower wing plate to the outer surface (lower surface of the lower wing plate) 32, when the position where the tangent of the curved surface forms a predetermined angle (e.g., 30°) with respect to the vertical direction is defined as the auxiliary boundary position, the position on the surface of the lower wing plate 30 directly above the auxiliary boundary position is identified as the first boundary 38a between the inclined surface of the lower reference inclined portion 36 and the outer peripheral surface 33 of the lower wing plate.

[0163] In the zipper pull 1 of this embodiment 1, the upper front avoidance portion 25 and the lower front avoidance portion 35 are formed such that the maximum dimension T2 in the thickness direction of the lower front avoidance portion 35 is smaller than the maximum dimension T1 in the thickness direction of the upper front avoidance portion 25. Therefore, when the zipper pull 1 of this embodiment 1 is mounted on, for example, a zipper tooth row 5 that is bent in the direction of the zipper's backing and slid along that zipper tooth row 5, as described later (see reference...), Figure 11 This effectively prevents or inhibits the zipper teeth 6 from being ground by the lower flange 30 of the zipper head body 10. In addition, it makes it difficult for the zipper tape to be damaged by the lower flange 13 of the zipper head body 10.

[0164] In this embodiment 1, when observing the cross-sections at the imaginary reference line 40 of the upper wing plate 20 and the lower wing plate 30 (refer to...) Figure 6 and Figure 7 The upper front avoidance portion 25 and the lower front avoidance portion 35 are formed such that the cross-sectional area of ​​the lower front avoidance portion 35 is smaller than the cross-sectional area of ​​the upper front avoidance portion 25.

[0165] Here, the area of ​​the cross-section of the upper front avoidance part 25 is measured when observing this cross-section ( Figure 6 The area of ​​the portion enclosed by the inclined surface of the upper front avoidance portion 25, the line extending from the first boundary portion 28a in a direction orthogonal to the vertical direction, and the line extending from the second boundary portion 28b in the vertical direction. The area of ​​the cross-section of the lower front avoidance portion 35 is the area of ​​the portion observed when viewing that cross-section. Figure 7The area of ​​the portion surrounded by the inclined surface of the lower front avoidance portion 35, the line extending from the first boundary portion 38a in a direction orthogonal to the vertical direction, and the line extending from the second boundary portion 38b in the vertical direction.

[0166] In addition, in this embodiment 1, when observing the above-mentioned cross-section of the upper front avoidance portion 25 ( Figure 6 When observing the above-mentioned cross-section of the upper front avoidance part 35, the angle between the tangent line at the midpoint 25c of the upper front avoidance part 25 in the vertical direction and the inclined surface, and the direction orthogonal to the vertical direction, is defined as the upper avoidance inclination angle θ1. Figure 7 When the lower front avoidance portion 35 is in the vertical direction, the angle between the tangent line between the midpoint 35d of the lower front avoidance portion 35 and the inclined surface, and the direction orthogonal to the vertical direction, is defined as the lower avoidance tilt angle θ2. In the case of this embodiment 1, the tangent line between the midpoint of the lower front avoidance portion 35 and the inclined surface is a straight line at the same position as the first lower front inclined surface 35a. In this case, the upper front avoidance portion 25 and the lower front avoidance portion 35 are formed such that the lower avoidance tilt angle θ2 is smaller than the upper avoidance tilt angle θ1.

[0167] In the upper front avoidance portion 25 and the lower front avoidance portion 35, as described above, the cross-sectional area of ​​the lower front avoidance portion 35 is made smaller than the cross-sectional area of ​​the upper front avoidance portion 25, and / or the lower avoidance tilt angle θ2 is made smaller than the upper avoidance tilt angle θ1. Therefore, for example, the same effect as when the maximum dimension T2 is made smaller than the maximum dimension T1 can be obtained. That is, in Figure 11 In the case shown, it is possible to effectively prevent or suppress the zipper teeth 6 from being ground by the lower flange 30 of the zipper head body 10. In addition, it makes it difficult for the zipper tape to be damaged by the lower flange 13 of the zipper head body 10.

[0168] In this embodiment 1, the maximum dimension T2 in the thickness direction of the lower front avoidance portion 35 is set to be 15% to 65% of the maximum dimension in the thickness direction of the lower wing plate 30, preferably 25% to 50% of the maximum dimension in the thickness direction of the lower wing plate 30. By making the aforementioned maximum dimension T2 of the lower front avoidance portion 35 15% or more of the maximum dimension in the thickness direction of the lower wing plate 30, when the zipper pull 1 slides relative to the zipper tooth row 5 as described later, it is difficult to grind the zipper teeth 6 from the shoulder side end of the inner surface 31 of the lower wing plate.

[0169] By making the maximum dimension T2 of the lower front avoidance portion 35 less than 65% of the maximum dimension in the thickness direction of the lower wing plate 30, the strength of the shoulder end of the lower wing plate 30 can be properly ensured. Furthermore, for example, when the zipper pull 1 slides relative to the zipper tooth row 5 in the tooth engagement direction (forward), it is possible to prevent the zipper tooth 6 from hooking onto the lower front avoidance portion 35, making it easy for the zipper tooth 6 to enter the tooth guide path of the zipper pull body 10 in the appropriate posture.

[0170] The lower front avoidance portion 35 is smoothly continuous with respect to the lower main plane 34 of the lower wing plate 30, and no layer difference or unevenness is provided between the lower front avoidance portion 35 and the lower main plane 34. Between the lower front avoidance portion 35 and the lower main plane 34 in the inner surface 31 of the lower wing plate, for example... Figure 5 As shown, the second boundary portion 38b, which divides the lower front avoidance portion 35 and the lower main plane 34, is configured in a convex shape that bulges out in the direction of entering the chain tooth guide path from the shoulder opening 18.

[0171] In other words, the second boundary portion 38b is convex in shape, either bent toward the connecting post 11 (especially toward the rear end of the connecting post 11) or bent into a convex shape toward the confluence portion where the two chain tooth guide paths on the left and right sides of the rear side of the connecting post 11 merge into one. As a result, the lower wing plate 30 can ensure appropriate strength and the lower front avoidance portion 35 can be stably provided at an appropriate size.

[0172] In this embodiment 1, the second boundary portion 38b is provided separately from the connecting post 11. The second boundary portion 38b is provided in the range of the gradually decreasing portion of the post in the connecting post 11 in the front-back direction.

[0173] Lower reference inclined portions 36 are provided on both sides of the lower front avoidance portion 35, such that the vertical distance between the inner surface 31 of the lower wing plate and the central reference surface 50 gradually increases towards the shoulder opening 18. Therefore, the inclined surface of the lower front avoidance portion 35 is separated from the connecting post 11 and the lower flange portion 13 respectively. In addition, the inclined surface of the lower front avoidance portion 35 has a portion that is recessed relative to the two adjacent lower reference inclined portions 36 in a vertical direction away from the central reference surface 50. The inclined surface of the lower front avoidance portion 35 is formed to be recessed downward compared to the two adjacent lower reference inclined portions 36 on both sides.

[0174] The lower front avoidance portion 35 has the shape described above and has a portion recessed relative to the lower reference inclined portion 36 on the left and right sides. For example, when the zipper tooth 6 moves within the tooth guide path of the zipper head body 10 while contacting the inner surface 31 of the lower wing plate, the tooth head 6a and / or tooth leg 6b of the zipper tooth 6 can contact at least one of the lower reference inclined portion 36. In addition, at least a portion of the zipper tooth 6 can be separated from the lower front avoidance portion 35.

[0175] Therefore, when the zipper pull 1 slides, the zipper teeth 6 can be maintained in an appropriate posture within the tooth guide path of the zipper pull body 10 using the lower reference inclined portion 36, while the zipper teeth 6 can move forward or backward. Simultaneously, at least a portion of the zipper teeth 6 can be made non-contact with the lower front avoidance portion 35 of the lower wing plate 30. That is, at least a portion of the zipper teeth 6 can form a non-contact portion that does not contact the inner surface 31 of the lower wing plate. Furthermore, when the zipper pull 1 slides, depending on the position and posture of the zipper teeth 6, there may be a situation where a portion of the zipper teeth 6 partially contacts the inclined surface of the lower front avoidance portion 35, but even in this case, at least a portion of the zipper teeth 6 does not contact the inclined surface of the lower front avoidance portion 35.

[0176] The lower reference inclined portion 36 has a first lower reference inclined portion 36a located between the lower front avoidance portion 35 and the connecting post 11, and a second lower reference inclined portion 36b located between the lower front avoidance portion 35 and the lower flange portion 13. Each lower reference inclined portion 36 is inclined such that the vertical distance between the inner surface 31 of the lower flange and the central reference surface 50 gradually increases toward the shoulder opening 18. In other words, the lower reference inclined portion 36 is inclined such that the thickness of the lower flange 30 gradually decreases toward the shoulder opening 18. The lower reference inclined portion 36 is formed to bulge upward or protrude upward compared to the lower front avoidance portion 35, approaching the upper flange 20. The lower reference inclined portion 36 is formed smoothly and continuously with the lower main plane 34.

[0177] The lower rearward avoidance portion 37 of the lower wing plate 30 is located at the end of the portion on the inner surface 31 of the lower wing plate, on the rear opening 19 side. When observing a section of the lower wing plate 30 orthogonal to the left-right direction (for example, referring to...) Figure 9 and Figure 10 The lower rear avoidance portion 37 has a shape that is inclined such that the vertical distance between the inner surface 31 of the lower wing plate and the central reference surface 50 gradually increases toward the rear opening 19. The inclined surfaces of the upper rear avoidance portion 27 and the lower rear avoidance portion 37 are symmetrical to each other vertically.

[0178] Therefore, the inclined surface of the lower rear avoidance portion 37 is formed by a curved surface that bulges outward toward the upper wing plate 20 (or toward the chain guide path) when viewed in a cross section orthogonal to the left and right directions of the lower wing plate 30. In particular, in this embodiment 1, the inclined surface of the lower rear avoidance portion 37 is formed as a convex curved surface throughout the entire front-rear direction of the lower rear avoidance portion 37.

[0179] In the lower wing plate 30 of this embodiment 1, the inclined surface of the lower front avoidance portion 35 is observed when the cross-section of the lower wing plate 30 is cut along the imaginary baseline 40 (refer to...). Figure 7 ), and the inclined surface of the lower rear avoidance portion 37 when observing the cross-section obtained by cutting the lower wing plate 30 in a direction orthogonal to the left and right directions (refer to Figure 9 and Figure 10 They have different shapes.

[0180] Therefore, whether the zipper teeth 6 are in contact with the shoulder end of the lower wing plate 30 while moving, or the left and right zipper teeth 6 are in contact with the rear end of the lower wing plate 30 while moving, similar to the case of the upper wing plate 20, different methods can be used to prevent or suppress the zipper teeth 6 from being strongly rubbed by the lower wing plate 30, making it difficult for the zipper teeth 6 to be ground.

[0181] When viewing the inner surface 31 of the lower wing plate from above (refer to...) Figure 5 The lower rear avoidance portion 37 is provided in the region from the boundary position 17 between the flange parallel portion 16a and the flange curved portion 16b in the left and right lower flange portions 13 to the rear opening 19. That is, the boundary position between the upper main plane 24 in the inner surface 21 of the upper flange and the upper rear avoidance portion 27, and the boundary position between the lower main plane 34 in the inner surface 31 of the lower flange and the lower rear avoidance portion 37 are provided at the same position as the boundary position 17 of the upper flange portion 12 or the lower flange portion 13, or are provided on the rear opening 19 side compared with the boundary position 17.

[0182] Furthermore, in this embodiment 1, the lower rear avoidance portion 37 is continuously provided in the front-to-back direction within a range of 70% to 100% of the zipper tooth engagement area located at the boundary position 17 between the rear opening 19 and the lower flange portion 13. This effectively prevents or suppresses the zipper teeth 6 from being strongly rubbed by the lower wing plate 30. In this embodiment 1, the lower rear avoidance portion 37 is preferably formed continuously in the front-to-back direction from the rear opening 19 of the zipper head body 10 to the boundary position 17 between the flange parallel portion 16a and the flange curved portion 16b.

[0183] Furthermore, since the upper rear avoidance portion 27 and the lower rear avoidance portion 37 are located in less than 100% of the zipper tooth engagement area, when the zipper head 1 slides forward along the zipper tooth row 5 (in the zipper tooth engagement direction), the left and right zipper teeth 6 can engage in the area in the zipper tooth guide path of the zipper head body 10 that is forward of the upper rear avoidance portion 27 and the lower rear avoidance portion 37 (i.e., the area where the flat upper main plane 24 and lower main plane 34 are formed). Therefore, the position and posture of the zipper teeth 6 can be appropriately restricted by the upper main plane 24 and the lower main plane 34 of the zipper head body 10, thereby enabling the left and right zipper teeth 6 to engage smoothly and stably.

[0184] When the zipper pull 1 of this embodiment 1 is installed on the zipper teeth 5 and slids, for example... Figure 9 and Figure 10 As shown in the case of the lower rear avoidance portion 37, the upper rear avoidance portion 27 and the lower rear avoidance portion 37 of the zipper head body 10 are formed such that one of the upper rear avoidance portion 27 and the lower rear avoidance portion 37 can contact the left and right chain teeth 5 in a mutually engaged state.

[0185] The upper rear avoidance portion 27 and the lower rear avoidance portion 37 are configured such that, when the interlocking left and right chain teeth 5 come into contact with one of the upper rear avoidance portion 27 and the lower rear avoidance portion 37, they always have a first contact portion 46 that contacts one of the zipper teeth 6 of the interlocking chain teeth 5 (e.g., the right chain teeth 5) and a second contact portion 47 that contacts one of the zipper teeth 6 of the other interlocking chain teeth 5 (e.g., the left chain teeth 5).

[0186] In this case, the zipper teeth 6 that contact the upper rear avoidance portion 27 or the lower rear avoidance portion 37 at the first contact portion 46 and the zipper teeth 6 that contact the upper rear avoidance portion 27 or the lower rear avoidance portion 37 at the second contact portion 47 are provided on different zipper tooth belts and are adjacent to each other and mesh. That is, the upper rear avoidance portion 27 and the lower rear avoidance portion 37 are configured such that when the zipper head 1 slides, they can contact the zipper teeth 6 of both the left and right zipper tooth belts one by one, and there will be no situation where only one of the zipper tooth belts of the left and right zipper teeth contacts the upper rear avoidance portion 27 or the lower rear avoidance portion 37.

[0187] Furthermore, in the zipper of this embodiment 1, the zipper tooth 6 is formed such that the tooth leg 6b is larger than the tooth head 6a in the vertical direction (tooth width direction). Therefore, in the first contact portion 46 and the second contact portion 47 of the upper rear avoidance portion 27 or the lower rear avoidance portion 37 of the zipper head body 10, the tooth leg 6b of the zipper tooth 6 contacts the inclined surface of the upper rear avoidance portion 27 or the lower rear avoidance portion 37.

[0188] In the upper rear avoidance portion 27 of this embodiment 1, the surface of the upper rear avoidance portion 27 sandwiched between the first contact portion 46 and the second contact portion 47 is always formed by a continuous convex curved surface. Similarly, the lower rear avoidance portion 37 sandwiched between the first contact portion 46 and the second contact portion 47 is also always formed by a continuous convex curved surface.

[0189] For example, when the zipper head body 10 is pulled downward or upward relative to the zipper tooth row 5 by a sliding operation based on the zipper tab, the zipper tooth 6 that is in contact with the upper rear avoidance portion 27 or the lower rear avoidance portion 37 of the zipper head body 10 is pressed against the upper rear avoidance portion 27 or the lower rear avoidance portion 37 while moving forward or backward.

[0190] In this case, in Embodiment 1, the upper rear avoidance portion 27 or the lower rear avoidance portion 37 of the zipper pull body 10 contacts and supports one zipper tooth 6 of one zipper tooth row 5 and one zipper tooth 6 of the other zipper tooth row 5 at the first contact portion 46 and the second contact portion 47 on the inclined surface formed as a curved surface. Therefore, the inclined surface of the upper rear avoidance portion 27 or the lower rear avoidance portion 37 always supports the two zipper teeth 6 on the left and right.

[0191] Therefore, when the zipper head body 10 is pulled downwards or upwards relative to the zipper teeth 5 and slides, the force on the zipper teeth 5 from the upper rear avoidance portion 27 or the lower rear avoidance portion 37 of the zipper head body 10 can be distributed to the two zipper teeth 6. That is, the force applied to each zipper tooth 6 can be reduced. Therefore, it is possible to effectively suppress or prevent the zipper teeth 6 from being ground down due to contact with the upper rear avoidance portion 27 or the lower rear avoidance portion 37.

[0192] In this embodiment 1, the dimension D1 of the upper rear avoidance portion 27 or the lower rear avoidance portion 37 along the front-to-back direction is set to be larger than the interval D2 between the zipper teeth 6 provided on a zipper tooth strip (a tooth row 5). Here, the dimension D1 of the upper rear avoidance portion 27 (or the lower rear avoidance portion 37) along the front-to-back direction refers to, for example, Figure 10 As shown, the dimension in the front-rear direction is from the boundary position 17 between the upper rear avoidance part 27 and the upper main plane 24 (or the boundary position 17 between the lower rear avoidance part 37 and the lower main plane 34) to the rear end position of the upper rear avoidance part 27 (or the lower rear avoidance part 37).

[0193] The spacing D2 between the zipper teeth 6 on a zipper belt refers to, for example, Figure 8As shown, in a zipper belt, the size of the space formed between the tooth leg 6b of one zipper tooth 6 and the tooth leg 6b of the other zipper tooth 6 in the front-back direction of two zipper teeth 6 arranged adjacent to each other in the front-back direction is shown.

[0194] By setting the dimension D1 in the front-to-back direction of the upper rear avoidance portion 27 or the lower rear avoidance portion 37 to be larger than the interval D2 between the zipper teeth 6 provided on one of the zipper teeth, such as... Figure 9 and Figure 10 As shown, it is possible to ensure that one zipper tooth 6 of one zipper tooth row 5 and one zipper tooth 6 of the other zipper tooth row 5 are always stably in contact with the upper rear avoidance portion 27 or the lower rear avoidance portion 37.

[0195] Furthermore, in the zipper body 10 of this embodiment, when viewing the upper wing plate 20 from the top or bottom (for example, referring to...), Figure 4 The rear end edge of the upper wing plate 20 is formed into a convex shape that bulges rearward. Therefore, in the case of this embodiment 1, the dimension of the upper rear avoidance portion 27 along the front-rear direction varies depending on the position of the upper rear avoidance portion 27 in the left-right direction. Furthermore, in the lower wing plate 30, similarly to the upper wing plate 20, when the lower wing plate 30 is viewed from above or below (for example, referring to...), the rear end edge is formed into a convex shape. Figure 5 The rear end edge of the lower wing plate 30 is formed into a convex shape that bulges out to the rear.

[0196] In this case, in the zipper pull body 10 of this embodiment, the front-to-back dimension D1 (i.e., the maximum dimension) of the upper rear avoidance portion 27 at its central portion in the left-right direction is set to be larger than the interval D2 between the zipper teeth 6 provided on one of the zipper tooth belts. Preferably, the front-to-back dimension (i.e., the minimum dimension) of the upper rear avoidance portion 27 at its side edge in the left-right direction is set to be larger than the interval D2 between the zipper teeth 6 provided on one of the zipper tooth belts. In addition, the front-to-back dimension D1 of the lower rear avoidance portion 37 is set in the same way as that of the upper rear avoidance portion 27.

[0197] In this embodiment 1, the zipper head 1, having the zipper head body 10 as described above, forms a zipper by means of slidably mounted on the left and right zipper tooth rows 5 of the zipper tooth belt. In this zipper, within the Y-shaped tooth guide path formed in the zipper head body 10, such as... Figure 8 The diagram shows 5 rows of interlaced chain teeth on the left and right.

[0198] Thus, by pulling the tab (not shown) of the zipper head 1, the zipper head body 10 slides forward along the left and right chain teeth rows 5, and the zipper teeth 6 of the left and right chain teeth rows 5 can be engaged sequentially within the Y-shaped chain tooth guide path formed in the zipper head body 10.

[0199] Furthermore, for example, when the left and right zipper teeth 5 are formed straight in the front-to-back direction (in other words, when the zipper teeth 5 are not bent in the up-and-down direction), by operating the pull tab, the zipper head body 10 is pulled forward. As a result, the zipper head body 10 is easily tilted forward relative to the zipper teeth 5, such that the rear end of the zipper head body 10 is lifted upward compared to the front end of the zipper head body 10. Therefore, the zipper teeth 6 forming the zipper teeth 5 are easily in contact with the upper wing plate 20 at the shoulder opening 18 side of the zipper head body 10 and are easily in contact with the lower wing plate 30 at the rear opening 19 side of the zipper head body 10.

[0200] In this case, in the zipper pull 1 of this embodiment 1, an upper front avoidance portion 25 is provided at the left and right shoulder ends of the upper wing plate 20. Therefore, when the zipper pull 1 slides, when the zipper teeth 6 are located at the shoulder ends of the upper wing plate 20, as described above, at least a portion of the zipper teeth 6 can be prevented from contacting the upper front avoidance portion 25, thus making it difficult for the zipper teeth 6 to be ground by the upper wing plate 20.

[0201] Furthermore, a lower rear avoidance portion 37 is provided at the rear opening end of the lower wing plate 30. Therefore, when the zipper pull 1 slides, even if the zipper teeth 6 come into contact with the rear opening end of the lower wing plate 30, the inclined surface of the lower rear avoidance portion 37 can reduce the force exerted on the zipper teeth 6 by pressing against the rear opening end of the lower wing plate 30. Moreover, since both zipper teeth 6 are always in contact with the lower rear avoidance portion 37, the force received by each zipper tooth 6 from the rear opening end (lower rear avoidance portion 37) can be dispersed. As a result, it is possible to effectively prevent or suppress the zipper teeth 6 from being worn down by the strong friction of the lower rear avoidance portion 37.

[0202] Furthermore, when the left and right zipper teeth 5 are formed in a straight line as described above, when the zipper head body 10 is pulled backward by the operation of the pull tab, the zipper head body 10 is prone to a backward tilted posture relative to the zipper teeth 5, with the front end of the zipper head body 10 being lifted upward compared to the rear end of the zipper head body 10. Therefore, the zipper teeth 6 are prone to contact the lower wing plate 30 on the shoulder opening 18 side of the zipper head body 10 relative to the backward tilted posture, and are prone to contact the upper wing plate 20 on the rear opening 19 side of the zipper head body 10.

[0203] In this case, in the zipper pull 1 of this embodiment 1, a lower front avoidance portion 35 is provided at the left and right shoulder opening sides of the lower wing plate 30, and an upper rear avoidance portion 27 is provided at the rear opening side of the upper wing plate 20. Therefore, when the zipper pull 1 slides backward, even if the zipper teeth 6 come into contact with the upper wing plate 20 and the lower wing plate 30, at least a portion of the zipper teeth 6 can be prevented from contacting the lower front avoidance portion 35, just as when the zipper pull 1 slides forward. Therefore, it is difficult for the zipper teeth 6 to be ground by the lower wing plate 30. In addition, it is possible to effectively prevent or suppress the zipper teeth 6 from being ground by strong friction from the upper rear avoidance portion 27.

[0204] Additionally, for example, when zippers are used in bags or suitcases, the left and right zipper teeth may have 5 rows of teeth, such as... Figure 11 As shown, sometimes the corners of bags or suitcases have a convex shape that bulges upwards and downwards. In this case, whether the zipper body 10 slides forward along the zipper teeth 5 by pulling the zipper tab (not shown) or sliding backwards, the zipper teeth 6 can easily contact the lower wing plate 30 at both the shoulder end and the rear end of the zipper body 10.

[0205] In this embodiment 1, the lower wing plate 30 is provided with left and right lower front avoidance portions 35 and lower rear avoidance portions 37. Therefore, when the zipper pull 1 slides, even if the zipper teeth 6 come into contact with the lower wing plate 30, the lower front avoidance portions 35 can prevent the zipper teeth 6 from being ground by the lower wing plate 30. In addition, it can effectively prevent or suppress the zipper teeth 6 from being ground by strong friction from the lower rear avoidance portions 37.

[0206] Therefore, even if the zipper pull 1 of this embodiment 1 repeatedly slides along the zipper teeth 5, it is difficult for the zipper teeth 6 to be ground down due to contact with the shoulder and rear ends of the zipper pull body 10. This makes it less likely that the appearance quality of the zipper will be reduced due to the exposure of the metal portion inside the zipper teeth 6.

[0207] Furthermore, the inventors of this application have repeatedly conducted various experiments and studies on a zipper puller 1 with an upper front avoidance portion 25 and a lower front avoidance portion 35 on the zipper puller body 10, and the results have clarified the following: That is, when the zipper puller 1 with the upper front avoidance portion 25 and the lower front avoidance portion 35 is positioned relative to... Figure 11 When the zipper teeth 5, which is curved in the vertical direction, slides, the position of the zipper teeth 6 moves downward relative to the lower wing plate 30 because the lower wing plate 30 has left and right lower front avoidance portions 35.

[0208] In this case, it is clear that the position of the zipper teeth 6 is lowered due to the setting of the lower front avoidance part 35. As a result, the zipper tape with multiple zipper teeth 6 is pulled by the zipper teeth 6. Furthermore, the zipper tape is strongly pressed against the lower flanges 13 on the left and right sides of the zipper head body 10. As a result, the zipper tape is easily damaged by the lower flanges 13 when the zipper head 1 slides.

[0209] Furthermore, when the zipper pull 1 is slid in the direction of zipper tooth engagement, compared to when it is slid in the direction of zipper tooth disengagement, the zipper pull 1 is pulled more forcefully by the pull tab. Therefore, the zipper teeth 6 tend to easily enter the left and right lower front avoidance portions 35 of the lower flange 30. Consequently, when the zipper pull 1 is slid in the direction of zipper tooth engagement, the zipper tape is pressed more forcefully against the left and right lower flange portions 13, and the possibility of a partial breakage of the zipper tape can be considered.

[0210] To address this issue, in the zipper pull 1 of this embodiment 1, as described above, the depth 54 of the lower front avoidance portion 35 relative to the central reference surface 50 is set to be smaller than the depth 53 of the upper front avoidance portion 25 relative to the central reference surface 50. Furthermore, the maximum thickness dimension T2 in the lower front avoidance portion 35 is made smaller than the maximum thickness dimension T1 in the upper front avoidance portion 25. Therefore, even with the lower front avoidance portion 35 provided, the magnitude of the relative descent of the zipper teeth 6 relative to the lower flange 30 can be reduced. As a result, the force exerted on the zipper tape by the lower flange portions 13 on the left and right sides of the zipper pull body 10 can be reduced. Therefore, when the zipper pull 1 slides, the grinding of the zipper teeth 6 by the lower flange 30 can be prevented or suppressed, and damage to the zipper tape by the lower flange portions 13 can be prevented or suppressed.

[0211] Example 2

[0212] Figure 12 This is a cross-sectional view of the upper wing plate of the pull head in Embodiment 2, viewed from below. Figure 13 This is a cross-sectional view of the lower wing plate of the pull head in Embodiment 2, viewed from above.

[0213] The zipper pull 2 ​​of this embodiment 2 is formed by two parts: a zipper pull body 10a and a pull tab (not shown). The zipper pull body 10a of this embodiment 2 has: an upper wing plate 20a; a lower wing plate 30a; a connecting post 11 that connects the front end of the upper wing plate 20a and the front end of the lower wing plate 30a; left and right upper flange portions 12 that are disposed on the left and right side edges of the upper wing plate 20a; left and right lower flange portions 13 that are disposed on the left and right side edges of the lower wing plate 30a; and a pull tab mounting portion 14 that stands upright from the upper surface of the upper wing plate 20a.

[0214] On the zipper body 10a of this embodiment 2, as follows Figure 12 and Figure 13As shown, a first receiving layer difference portion 29 is provided on the inner surface 21a of the upper wing plate 20a, and a second receiving layer difference portion 39 is provided on the inner surface 31a of the lower wing plate 30a.

[0215] Furthermore, the zipper pull body 10a of this embodiment 2 is substantially the same as the zipper pull body 10 of the aforementioned embodiment 1, except that it is provided with the first receiving layer difference portion 29 and the second receiving layer difference portion 39. Therefore, in this embodiment 2, the first receiving layer difference portion 29 of the upper wing plate 20a and the second receiving layer difference portion 39 of the lower wing plate 30a will be described in detail, and the same reference numerals will be used to indicate the parts and locations that are substantially the same as those in the zipper pull body 10 of the aforementioned embodiment 1, and their detailed descriptions will be omitted.

[0216] In this embodiment 2, the inner surface 21a of the upper wing plate 20a has: an upper main plane 24a, which is formed parallel to the front-rear direction; a pair of upper front avoidance portions 25, which are provided at the ends of the left and right shoulder openings 18 sides of the inner surface 21a of the upper wing plate; an upper reference inclined portion 26, which is provided on both sides of each upper front avoidance portion 25; an upper rear avoidance portion 27, which is provided at the rear end of the inner surface 21a of the upper wing plate; and a pair of first receiving layer difference portions 29, which are provided on the inner side of the chain tooth guide path compared with the upper front avoidance portions 25.

[0217] In this embodiment 2, the left and right upper front avoidance portions 25, multiple upper reference inclined portions 26, and upper rear avoidance portions 27 on the inner surface 21a of the upper wing plate are substantially the same as those in embodiment 1. The upper main plane 24a of this embodiment 2 is formed with a smaller area than the upper main plane 24 of embodiment 1 by the provision of the left and right first receiving layer difference portions 29.

[0218] The left and right first receiving layer portions 29 each have a first connecting portion 29b and a flat first bottom portion 29a.

[0219] The first bottom portion 29a of the first receiving layer difference portion 29 is formed by a plane orthogonal to the vertical direction. The first bottom portion 29a is disposed inside the chain guide path compared to the upper front avoidance portion 25, and is formed adjacent to the upper front avoidance portion 25. The first bottom portion 29a is smoothly continuous with the upper front avoidance portion 25, and is recessed relative to the upper main plane 24a. The first connecting portion 29b of the first receiving layer difference portion 29 is formed by an inclined surface disposed between the first bottom portion 29a and the upper main plane 24a, and is smoothly continuous with respect to both the first bottom portion 29a and the upper main plane 24a.

[0220] The lower wing plate 30a has the following features: a lower main plane 34a, which is formed parallel to the front-rear direction; a pair of lower front avoidance portions 35, which are provided at the ends of the left and right shoulder openings 18 in the lower wing plate inner surface 31a; a lower reference inclined portion 36, which is provided on both sides of each lower front avoidance portion 35; a lower rear avoidance portion 37, which is provided at the rear end of the lower wing plate inner surface 31a; and a pair of second receiving layer difference portions 39, which are provided inside the chain tooth guide path compared to the lower front avoidance portions 35.

[0221] In this embodiment 2, the left and right lower front avoidance portions 35, multiple lower reference inclined portions 36, and lower rear avoidance portions 37 on the inner surface 31a of the lower wing plate are substantially the same as those in embodiment 1. The lower main plane 34a of this embodiment 2 is formed with a smaller area than the lower main plane 34 of embodiment 1 by the provision of the left and right second receiving layer difference portions 39.

[0222] The left and right second containment layer portions 39 each have a second connecting portion 39b and a flat second bottom portion 39a.

[0223] The second bottom portion 39a of the second receiving layer difference portion 39 is formed by a plane orthogonal to the vertical direction. The second bottom portion 39a is disposed inside the chain guide path compared to the lower front avoidance portion 35, and is formed adjacent to the lower front avoidance portion 35. The second bottom portion 39a is smoothly continuous with the lower front avoidance portion 35, and is recessed relative to the lower main plane 34a. The second connecting portion 39b of the second receiving layer difference portion 39 is formed by an inclined surface disposed between the second bottom portion 39a and the lower main plane 34a, and is smoothly continuous with respect to both the second bottom portion 39a and the lower main plane 34a.

[0224] For example, in a zipper, in order to prevent the zipper pull installed on the zipper teeth from falling off the front end of the zipper teeth, there is a situation where a pair of left and right stops (not shown) for the zipper pull to abut against are arranged adjacent to the front ends of the left and right zipper teeth.

[0225] The zipper pull 2 ​​of this embodiment is suitable for zippers with left and right stops (not shown) as described above. By installing the zipper pull 2 ​​of this embodiment 2 into the chain tooth row 5 of the zipper with left and right stops, when the zipper pull 2 ​​is slid to abut against the left and right stops, the left and right stops can be inserted and accommodated in the first receiving layer difference portion 29 and the second receiving layer difference portion 39 provided in the zipper pull body 10a, respectively.

[0226] Therefore, in a zipper equipped with the zipper pull 2 ​​of this embodiment 2, the zipper pull 2 ​​of this embodiment 2 can come into contact with the left and right stops, thereby stopping the sliding of the zipper pull 2 ​​and preventing the zipper pull 2 ​​from falling off the chain teeth 5. Furthermore, when the zipper pull 2 ​​of this embodiment 2 comes into contact with the left and right stops, the left and right stops can be accommodated in the first accommodating layer difference portion 29 and the second accommodating layer difference portion 39 provided in the zipper pull body 10a, thereby allowing at least a portion of the left and right stops to be hidden within the zipper pull body 10a and not visible. Therefore, the appearance quality of the zipper when closed can be improved.

[0227] Furthermore, the zipper head body 10a of this embodiment 2 is substantially the same as the zipper head body 10 of the aforementioned embodiment 1, except that it is provided with the first receiving layer difference portion 29 and the second receiving layer difference portion 39. Therefore, the zipper head 2 of this embodiment 2 can achieve the same effect as the zipper head 1 of the aforementioned embodiment 1.

[0228] That is, even if the zipper head 2 of this embodiment is repeatedly slidable, it is difficult to grind down the zipper teeth 6. Therefore, by using the zipper head 2 of this embodiment, it is possible to prevent the appearance quality of the zipper from being reduced due to the exposure of the metal part inside the zipper teeth 6.

[0229] It should be noted that the present invention is not limited to the embodiments described above. Various modifications can be made as long as the invention has a substantially the same structure and performs the same function.

[0230] For example, in Embodiments 1 and 2 described above, rear avoidance portions 27 and 37 are formed on both the upper wing plates 20 and 20a and the lower wing plates 30 and 30a of the slider bodies 10 and 10a. However, in this invention, the slider body may be formed by providing a rear avoidance portion only on either the upper or lower wing plate, or the slider body may be formed without providing a rear avoidance portion on either the upper or lower wing plate.

[0231] Furthermore, in Embodiments 1 and 2, the use of zipper heads 1 and 2 for zippers (metal zippers) having multiple metal zipper teeth 6 was described. However, the zipper heads of the present invention can also be used for zippers with multiple zipper teeth other than metal zipper teeth installed on the zipper tape (i.e., zippers other than metal zippers).

Claims

1. A zipper pull having a zipper pull body (10, 10a) comprising: an upper wing plate (20, 20a); a lower wing plate (30, 30a) disposed separately from the upper wing plate (20, 20a); a connecting post (11) connecting the front end of the upper wing plate (20, 20a) and the front end of the lower wing plate (30, 30a); a pair of shoulder openings (18) opening on the left and right sides of the connecting post (11); a rear opening (19) opening at the rear end of the zipper pull body (10, 10a); and a tooth guide formed between the upper wing plate (20, 20a) and the lower wing plate (30, 30a) and communicating the shoulder openings (18) and the rear opening (19), characterized in that, The upper wing plate (20, 20a) has a pair of upper front avoidance portions (25), which are provided on the inner surface of the upper wing plate (20, 20a) opposite to the lower wing plate (30, 30a) and are disposed at the ends of the left and right shoulder openings (18). With the imaginary plane passing through the center position of the connecting column (11) in the vertical direction and orthogonal to the vertical direction defined as the central reference plane (50), each of the upper front avoidance portions (25) has an inclined surface that causes the vertical distance (51) between the upper front avoidance portion (25) and the central reference plane (50) to gradually increase toward the shoulder opening (18). The lower wing plates (30, 30a) have a pair of lower front avoidance portions (35), which are provided on the inner surface of the lower wing plates (30, 30a) opposite to the upper wing plates (20, 20a) and are disposed at the ends of the left and right shoulder openings (18). Each of the lower front avoidance portions (35) has an inclined surface that causes the vertical spacing (52) between the lower front avoidance portion (35) and the central reference plane (50) to gradually increase toward the shoulder opening (18). The depth (54) of the lower front avoidance portion (35) relative to the central reference plane (50) is less than the depth (53) of the upper front avoidance portion (25) relative to the central reference plane (50).

2. The zipper pull according to claim 1, characterized in that, The maximum vertical dimension (T2) in the lower front avoidance portion (35) is smaller than the maximum vertical dimension (T1) in the upper front avoidance portion (25).

3. The zipper pull according to claim 1, characterized in that, The slider body (10, 10a) has left and right upper flange portions (12) extending from the left and right side edges of the upper wing plate (20, 20a) toward the lower wing plate (30, 30a), and left and right lower flange portions (13) extending from the left and right side edges of the lower wing plate (30, 30a) toward the upper wing plate (20, 20a). The upper wing plate (20, 20a) has a first upper reference inclined portion (26a) disposed between the upper front avoidance portion (25) and the connecting post (11), and a second upper reference inclined portion (26b) disposed between the upper front avoidance portion (25) and the upper flange portion (12). The first upper reference inclined portion (26a) and the second upper reference inclined portion (26b) each have an inclined surface that is inclined such that the vertical distance between the first upper reference inclined portion (26a) or the second upper reference inclined portion (26b) and the central reference surface (50) gradually increases toward the shoulder opening (18). The upper front avoidance portion (25) has a portion that is recessed relative to the first upper reference inclined portion (26a) and the second upper reference inclined portion (26b) in a manner that moves away from the central reference surface (50) in the vertical direction. The lower flange (30, 30a) has a first lower reference inclined portion (36a) disposed between the lower front avoidance portion (35) and the connecting post (11), and a second lower reference inclined portion (36b) disposed between the lower front avoidance portion (35) and the lower flange portion (13). The first lower reference inclined portion (36a) and the second lower reference inclined portion (36b) each have an inclined surface that is inclined such that the vertical distance between the first lower reference inclined portion (36a) or the second lower reference inclined portion (36b) and the central reference surface (50) gradually increases toward the shoulder opening (18). The lower front avoidance portion (35) has a portion that is recessed relative to the first lower reference inclined portion (36a) and the second lower reference inclined portion (36b) in a manner that moves away from the central reference surface (50) in the vertical direction.

4. The zipper pull according to claim 1, characterized in that, When viewed in cross-section along the vertical direction of the upper wing plate (20, 20a) and the lower wing plate (30, 30a), the inclined surface of the upper front avoidance portion (25) and the inclined surface of the lower front avoidance portion (35) have different shapes.

5. The zipper pull according to claim 1, characterized in that, The inclined surface of the upper front avoidance portion (25) has a first upper front inclined surface (25a) and a second upper front inclined surface (25b). In a cross-sectional view of the upper wing plates (20, 20a) along the vertical direction and along the direction in which the inclined surfaces are inclined, the first upper front inclined surface (25a) is formed by a curved surface that bulges outwards towards the lower wing plates (30, 30a), and the second upper front inclined surface (25b) is formed by a straight plane. The inclined surface of the lower front avoidance portion (35) has a first lower front inclined surface (35a), a second lower front inclined surface (35b) and a third lower front inclined surface (35c). In a cross-sectional view of the lower wing plates (30, 30a) along the vertical direction and along the direction in which the inclined surface is inclined, the first lower front inclined surface (35a) is formed by a straight plane, the second lower front inclined surface (35b) is formed by a curved surface that is convex in a manner that bulges out toward the upper wing plates (20, 20a), and the third lower front inclined surface (35c) is formed by a curved surface that is concave in a manner that moves away from the upper wing plates (20, 20a).

6. The zipper pull according to claim 1, characterized in that, The upper wing plates (20, 20a) have upper main planes (24, 24a) that are formed facing the chain tooth guide and parallel to the front-rear direction. The boundary (28) between the upper front avoidance portion (25) and the upper main plane (24, 24a) has a convex shape that bulges out in the direction of entering the chain tooth guide path from the shoulder opening (18). The lower wing plates (30, 30a) have a lower main plane (34, 34a) formed facing the chain tooth guide and parallel to the front-rear direction. The boundary (38) between the lower front avoidance portion (35) and the lower main plane (34, 34a) has a convex shape that bulges out in the direction of entering the chain tooth guide path from the shoulder opening (18).

7. The zipper pull according to claim 1, characterized in that, At least one of the upper wing plate (20, 20a) and the lower wing plate (30, 30a) has a rear avoidance portion (27, 37) that is inclined such that the vertical distance between the inner surface (21, 21a, 31, 31a) of the upper wing plate (20, 20a) or the lower wing plate (30, 30a) and the central reference plane (50) gradually decreases toward the rear opening (19).

8. The zipper pull according to claim 7, characterized in that, The rear avoidance section (27, 37) has: The rearward avoidance portion (27) is provided on the upper side of the upper wing plate (20, 20a); and A rearward avoidance portion (37) is provided on the lower side of the lower wing plate (30, 30a). The upper rear avoidance portion (27) and the lower rear avoidance portion (37) have a symmetrical shape.

9. The zipper pull according to claim 7, characterized in that, The slider body (10, 10a) has at least one of the following: left and right upper flanges (12) protruding from the left and right side edges of the upper wing plate (20, 20a) toward the lower wing plate (30, 30a); and left and right lower flanges (13) protruding from the left and right side edges of the lower wing plate (30, 30a) toward the upper wing plate (20, 20a). At least one of the upper flange portion (12) and the lower flange portion (13) has: a flange parallel portion (16a) with a constant interval between the left and right upper flange portions (12) or between the left and right lower flange portions (13); and a flange curved portion (16b) with the interval between the left and right upper flange portions (12) or between the left and right lower flange portions (13) gradually increasing forward. When the area in the front-back direction between the rear opening (19), the boundary position (17) between the rear opening (19) and the flange parallel portion (16a) and the flange curved portion (16b) is defined as the chain tooth engagement area, the rear avoidance portions (27, 37) are continuously provided in the front-back direction within a range of more than 70% of the chain tooth engagement area.

10. The zipper pull according to claim 7, characterized in that, The rear avoidance portion (27, 37) is formed as a curved surface that bends into a convex shape towards the chain tooth guide when viewed in a cross-sectional view orthogonal to the left and right direction.

11. The zipper pull according to claim 7, characterized in that, The shape of the inclined surface of the upper front avoidance portion (25) when viewed in a cross section of the upper wing plate (20, 20a) along the vertical direction and along the direction in which the inclined surface is inclined is different from the shape of the inclined surface of the rear avoidance portion (27) when viewed in a cross section orthogonal to the left and right direction. The shape of the inclined surface of the lower front avoidance portion (35) when viewed in a cross section of the lower wing plate (30, 30a) along the vertical direction and along the direction in which the inclined surface is inclined is different from the shape of the inclined surface of the rear avoidance portion (37) when viewed in a cross section orthogonal to the left and right direction.

12. The zipper pull according to claim 7, characterized in that, The rear avoidance portions (27, 37) are configured such that, when the zipper pulls (1, 2) are mounted on the chain teeth (5) of a pair of zipper chain belts, they can contact the left and right chain teeth (5) in an engaged state. The rear avoidance portion (27, 37) always has a first contact portion (46) that contacts one of the zipper teeth (6) of the zipper tooth row (5) that forms an engagement, and a second contact portion (47) that contacts one of the zipper teeth (6) of the zipper tooth row (5) that forms an engagement, when the left and right zipper tooth rows (5) are in contact. The surface between the first contact portion (46) and the second contact portion (47) in the rear avoidance portion (27, 37) is formed as a convex curved surface.

13. The zipper pull according to claim 7, characterized in that, When the zipper pulls (1, 2) are mounted on the tooth rows (5) of a pair of zipper teeth, the front-to-back dimension (D1) of the rear avoidance portion (27, 37) is larger than the interval (D2) between the zipper teeth (6) arranged adjacent to each other in one of the tooth rows (5).

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