zipper

Abstract

When the advancement of the slider (5) is blocked by the stopper (72) of the front stopper (7), the front stopper (7) is oriented such that the contact portion (12g) included in the front region (12f) of the second side surface (12) of the front stopper (7) is in contact with the inner wall surface (86) of the flange portion (54b, 55b) of the slider (5), and at least a part of the rear region (11r) of the first side surface (11) of the front stopper (7) is in contact with the wall surface (94) of the link column (53).

Description

Technical Field

[0001] This disclosure relates to a zipper. Background Technology

[0002] In a zipper, the zipper teeth on the left and right sides engage and disengage by moving the zipper pull forward and backward. As a front stop element of the zipper, it is known to have an upper and lower raised portion that are formed in the width direction across the core thread, as disclosed in Patent Document 1, resulting in a relatively long front stop element (see Patent Document 1). Figure 1 As a rear stop for the zipper, it is known that there are opening inserts that allow the left and right zipper teeth to separate, as disclosed in Patent Document 2 (see Patent Document 2). Figure 1 Furthermore, the front stop in Patent Document 2 is made of metal and has bulges on both the upper and lower sides (see Patent Document 2). Figure 6 ).

[0003] Patent Document 3, like Patent Document 2, discloses a zipper that allows the left and right zipper teeth to be separated. Unlike Patent Document 2, in Patent Document 3, the zipper pull can advance past the front stop of the single-tooth zipper tooth, meaning the zipper pull can be detached from the single-tooth zipper tooth. For this purpose, Patent Document 3... Figure 3 The pull head in state A is operated to rotate it, becoming... Figure 3 B's state, next, becomes Figure 3 The state of C. (Patent document 3) Figure 4 A- Figure 4 C indicates the process of installing the slider on a single-tooth chain.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: International Publication No. 2017 / 104007

[0007] Patent Document 2: Japanese Patent Application Publication No. 2002-253307

[0008] Patent Document 3: Japanese Patent Application Publication No. 2-239804 Summary of the Invention

[0009] The problem the invention aims to solve

[0010] The desired outcome is to more reliably prevent the zipper pull from moving and detaching beyond the front stop of the single-tooth chain. For this purpose, such as... Figure 13As shown in the diagram, a test is conducted where a weight 100 is mounted on the pull tab 57 of the zipper 5 and the zipper is pulled forward, i.e., downward in the vertical direction. Based on the inventor's research, it is understood that in such a test, a relatively large force may be locally applied to the zipper due to the different shapes of the front stop of the single-tooth chain belt.

[0011] Solution for solving the problem

[0012] One aspect of the zipper disclosed herein includes: a pair of zipper teeth, formed by zipper teeth provided on opposite side edges of the zipper teeth; and a zipper pull that moves forward and backward to engage and disengage the zipper teeth of the pair of zipper teeth. At least one of the zipper teeth of the pair of zipper teeth includes a resin front stop disposed adjacent to a zipper tooth of the at least one zipper tooth. The front stop includes: an insertion portion that should be inserted into the zipper pull; a stop portion having an upper protrusion and a lower protrusion respectively projecting upward and downward to prevent forward movement of the zipper pull; a first side portion located on the connecting post side of the zipper pull when the forward movement of the zipper pull is stopped by the stop portion; and a second side portion located on the flange side of the zipper pull when the forward movement of the zipper pull is stopped by the stop portion. The first side portion and the second side portion each include at least a rear region and a front region located further forward than the rear region. The front region of the second side slopes or bulges away from the first side as it extends forward, so as to form a predetermined angle with the rear region of the second side (not limited to this, but for example, an angle in the range of 5° to 20°). When the forward movement of the pull head is blocked by the stop, the front stop is oriented such that the contact portion included in the front region of the second side contacts the inner wall surface of the flange, and at least a portion of the rear region of the first side contacts the wall surface of the connecting post.

[0013] In several embodiments, the front region of the second side is an inclined surface as described above. The slider can be made of resin, but should not be limited to this.

[0014] In several embodiments, the front stop has a front surface and a chamfered corner portion disposed between the front surface and the second side surface. The corner portion is positioned in front of the flange portion at a distance from it when the forward movement of the pull head is blocked by the stop portion. When the contact portion contacts the inner wall surface of the flange portion, the first side surface contacts the wall surface of the connecting post not only with its rear region but also with a portion of its front region.

[0015] In several embodiments, the rear region of the second side can be a flat surface extending parallel to the length direction of at least one zipper tooth, but is not necessarily limited to this. Similarly, the rear region of the first side can include a flat surface extending parallel to the length direction of at least one zipper tooth.

[0016] In several embodiments, the connecting post has left and right walls that approach each other as they extend toward the rear end of the connecting post, with at least a portion of the rear region of the first side side in contact with the wall.

[0017] In several embodiments, the upper protrusion has an inclined surface that contacts an inclined surface on the lower surface of the upper wing plate of the zipper head, which is disposed facing forward, and the lower protrusion has an inclined surface that contacts an inclined surface on the upper surface of the lower wing plate of the zipper head, which is disposed facing forward.

[0018] In any of the above-mentioned zipper types, the following is achieved: with a pair of zipper teeth separated, the zipper head is pulled forward with a force of 66N or more, and the forward movement of the zipper head is stopped by the front stop for a predetermined time range of at least 10 seconds.

[0019] The effects of the invention

[0020] According to one embodiment of this disclosure, a large force is locally transferred from one to the other between the front stop and the pull head of a single-tooth chain. Attached Figure Description

[0021] Figure 1 This is a frontal view of one form of zipper disclosed herein, schematically showing the state in which the forward movement of the zipper head is blocked by a front stop.

[0022] Figure 2 This is a partial schematic diagram showing the front end of the single-tooth chain band on the right side of a zipper of one embodiment of the present disclosure.

[0023] Figure 3 It means Figure 2 A schematic diagram of the right side of the front stop of the single-tooth chain belt.

[0024] Figure 4 This is a rough top view of the pull head.

[0025] Figure 5 This is a rough rear view of the pull tab.

[0026] Figure 6 This is a rough right-side view of the pull head.

[0027] Figure 7 This is a rough bottom view of the upper wing plate of the pull head.

[0028] Figure 8 This is a rough top view of the lower wing of the pulley.

[0029] Figure 9 This is a schematic diagram showing the front stop being inserted into and held inside the pull head in the single-tooth chain on the right side.

[0030] Figure 10This is a rough right-side view of the slider, with the front stop, which is inserted into and held within the slider, indicated by dashed lines.

[0031] Figure 11 This is a schematic diagram showing the state in which the front stop is inserted into and held inside the pull head in the single-tooth chain belt of the comparative example.

[0032] Figure 12 This is a schematic diagram showing the state in which the front stop is inserted and held inside the pull head in a single-tooth chain belt of another comparative example.

[0033] Figure 13 This is a reference diagram used to illustrate the test used to evaluate the blocking force of the front stop.

[0034] Figure 14 This is a partial schematic diagram showing the front end of the single-tooth chain band on the right side of a zipper of another embodiment of the present disclosure. Detailed Implementation

[0035] The following is for reference Figures 1 to 14 Various embodiments and features are described in this document. Those skilled in the art will be able to combine the various embodiments and / or features without excessive explanation, and will understand the complementary effects resulting from their combination. Repetitive descriptions between embodiments are omitted in principle. The description is primarily for the purpose of illustrating the invention, and simplifications are made for ease of drawing. The features are not limited to the zippers disclosed in this application, but are understood to be general features applicable to other zippers not disclosed in this specification.

[0036] In this specification, the forward and backward direction is understood based on the direction of movement of the zipper pull. The left and right direction is orthogonal to the forward and backward direction and parallel to the surface of the zipper tape of a specified thickness. The up and down direction is orthogonal to both the forward and backward and left and right directions. Furthermore, these directional terms may be redefined based on the following descriptions.

[0037] The zipper 1 includes: a pair of left and right zipper strips 2a and 2b, with left and right zipper teeth 4a and 4b provided on opposite side edges 39a and 39b of the left and right zipper strips 2a and 3b; a zipper pull 5 that moves forward and backward to engage and disengage the left and right zipper teeth 4a and 4b of the left and right zipper strips 2a and 2b; and a rear stop 9. Furthermore, the zipper pull 5 moves back and forth along the center line CL of the zipper 1. Additionally, the length direction of the zipper strips 2a and 2b and the zipper strips 3a and 3b is aligned with the front-back direction, and the width direction of the zipper strips 2a and 2b and the zipper strips 3a and 3b is aligned with the left-right direction.

[0038] The left zipper belt 2a, in addition to having a zipper belt 3a and zipper teeth 4a, also has a resin-made left front stop 6, which is disposed adjacent to the zipper teeth 4a. Similarly, the right zipper belt 2b, in addition to having a zipper belt 3b and zipper teeth 4b, also has a resin-made right front stop 7, which is disposed adjacent to the zipper teeth 4b. The forward movement of the zipper pull 5 is stopped by the left and right front stops 6 and 7, but is not limited to this; it can also be stopped by the front stop 7 alone. That is, even in the state where the left and right zipper belts 2a and 2b are separated, and the zipper pull 5 moves on the zipper teeth 4b of the right zipper belt 2b (for example, on a row of zipper teeth 4b), the detachment of the zipper pull 5 is also prevented by the front stop 7 alone. The detailed structure of the front stop 7 will be discussed later.

[0039] The rear stop 9 is configured to allow the separation of the left and right zipper chain straps 2a and 2b. In some cases, the rear stop 9 has a detachable insert (part 1) 9a and a socket (part 2) 9b. The socket 9b has a housing and a base extending forward from the housing. To engage the left and right zipper chain straps 2a and 2b, the insert 9a is sequentially inserted into the interior of the zipper pull 5, which is positioned adjacent to the housing of the socket 9b at the front of the housing, and into the insertion slot of the housing of the socket 9b. In this state, the zipper pull 5 advances and the insert 9a engages with the socket 9b. To separate the left and right zipper chain straps 2a and 2b, the zipper pull 5 is positioned adjacent to the rear stop 9 at the front of the rear stop 9, and the insert 9a is pulled forward from the insertion slot of the housing of the socket 9b and the interior of the zipper pull 5. Furthermore, various types of rear stops can be obtained as the rear stop 9, and it is not limited to the rear stop shown in the figure.

[0040] Zipper tapes 3a and 3b have an upper surface 31 and a lower surface 32 (see reference). Figure 3 The zipper tapes 3a and 3b are flexible members of a defined thickness, typically fabrics, knitted fabrics, or mixtures thereof. The zipper tapes 3a and 3b extend relatively long in the front-to-back direction with a certain lateral width. Core threads are provided at the side edges 39a and 39b of the zipper tapes 3a and 3b, to which the zipper teeth 4a and 4b and the front stops 6 and 7 are fixed.

[0041] Zipper teeth 4a and 4b are resin teeth formed by injection molding, in which resin is attached to the opposite side edges 39a and 39b (core wire) of the zipper tape. Zipper teeth 4a and 4b are arranged at predetermined intervals along the front-to-back direction to form a tooth row. The left and right zipper teeth 4a and 4b are alternately arranged in the front-to-back direction to allow for engagement and disengagement.

[0042] The resin-made zipper tooth has: a base 41 attached to the side edge of the zipper tape; a head 42 positioned further outward than the base 41; and a neck 43 positioned between the base 41 and the head 42. In the front-to-back direction, the neck 43 is narrower than the head 42. The head 42 of the zipper tooth 4a can be inserted into and held between the necks 43 of adjacent zipper teeth 4b. Furthermore, "outward" refers to the direction from the position on the zipper tape surface towards the position outside the tape surface. Optionally, fin portions 44 are provided on both the front and back sides of the neck 43 (see reference). Figure 2 The head 42 is provided with an insertion groove for the fin portion 44 to be inserted.

[0043] In addition, zipper teeth 4a and 4b can also be other types of teeth such as metal teeth, ceramic teeth, or spiral teeth. Metal teeth are well-known. Ceramic teeth contain at least part of ceramic and are installed on opposite sides of the zipper tape by any method. Spiral teeth are well-known and are made by sewing a single filament wound into a spiral shape onto the zipper tape.

[0044] The zipper pull 5 is made of resin, metal, or ceramic, such as... Figures 4-6 As shown, the zipper includes an upper wing plate 51, a lower wing plate 52, a connecting post 53 connecting the upper wing plate 51 and the lower wing plate 52, left and right flanges 54a and 54b protruding downward from the left and right side edges of the upper wing plate 51, left and right flanges 55a and 55b protruding upward from the left and right side edges of the lower wing plate 52, and a zipper pull mounting part 56. The upper wing plate 51 and the lower wing plate 52 are connected by the connecting post 53 at the left and right center of their front ends to form a Y-shaped zipper tooth passage, and the left and right flanges 54a, 54b, 55a, and 55b are provided to prevent the zipper teeth 4a and 4b from falling out of the Y-shaped zipper tooth passage.

[0045] The zipper pull 5 is configured such that if a certain or greater lateral pulling force is applied to the left and right zipper teeth 2a and 2b, one of the zipper teeth 2a will detach from the zipper pull 5. For this purpose, a notch 51c is provided at the front end of the left side of the upper wing plate 51. Furthermore, the left flange portions 54a and 55a are shorter and positioned at a lower height than the right flange portions 54b and 55b in the front-rear direction. Additionally, the front ends of the left flange portions 54a and 55a are offset rearward compared to the front ends of the right flange portions 54b and 55b. Furthermore, the pull tab mounting portion 56 is offset to the right or left relative to the centerline CL of the zipper pull 5. Needless to say, this disclosure is not limited to this type of zipper pull 5, and other types of zipper pull 5 can also be developed.

[0046] The lower surface of the upper wing plate 51 and the upper surface of the lower wing plate 52 (collectively referred to as the opposing inner surfaces) are arranged opposite each other at a distance equal to the thickness (e.g., maximum thickness) of the zipper teeth 4a, 4b and the insertion portion 71 of the front stop member 7 (discussed later), or at a distance slightly larger than the thickness (e.g., maximum thickness) of the insertion portion 71 of the zipper teeth 4a, 4b and the insertion portion 71 of the front stop member 7 (discussed later). The distance between the opposing inner surfaces of the upper wing plate 51 and the lower wing plate 52 is less than the maximum thickness of the stop portion 72 of the front stop member 7 (discussed later). Inclined surfaces 58p and 58q (sometimes referred to as inclined surface 58 without distinction) are provided on the lower surface of the upper wing plate 51 facing forward. Inclined surfaces 59p and 59q (sometimes referred to as inclined surface 59 without distinction) are provided on the upper surface of the lower wing plate 52 facing forward. The inclined surfaces 73p and 73q of the upper protrusion 73 of the front stop 7, which will be discussed later, are in contact with the inclined surfaces 58p and 58q of the upper wing plate 51. Similarly, the inclined surfaces 74p and 74q of the lower protrusion 74 of the front stop 7 are in contact with the inclined surfaces 59p and 59q of the lower wing plate 52.

[0047] like Figure 7 and Figure 8 As shown, each flange portion 54a, 54b, 55a, 55b extends along the center line CL of the zipper pull 5 and has: a rear end 81; a front end 82; a rear portion 83 that extends parallel to the center line CL of the zipper pull 5 from the rear end 81; and a front portion 84 that is inclined away from the center line CL of the zipper pull 5 as it extends forward from the rear portion 83. The inner wall surface 85 of the rear portion 83 extends parallel to the center line CL of the zipper pull 5. The inner wall surface 86 of the front portion 84 is inclined away from the center line CL of the zipper pull 5 as it extends forward. The distance W1' between the inner wall surfaces 85 of the rear portion 83 of the left and right flange portions 54a, 54b or the left and right flange portions 55a, 55b and the left and right width W1 of the zipper teeth 4a, 4b in the engaged state (refer to...) Figure 1 The width of the slider 5 is equal to or slightly larger than the width of the zipper 1. Furthermore, the center line CL of the slider 5 is coaxial with the center line CL of the zipper 1.

[0048] The connecting post 53 extends from its rear end 91 toward its front end 92 along the center line CL of the zipper pull 5, and is symmetrically shaped with respect to the center line CL. The connecting post 53 has flat left and right side walls 93 and 94 that approach each other as it extends toward its rear end 91. The distance W2' between the side walls 93 and 94 and the inner wall 86 of the front portion 84 of the flange portions 54a, 54b, 55a, 55b and the left and right width W2 of the individual zipper teeth 4a, 4b (see reference). Figure 2The width of the wall 94 is equal to or slightly larger than the width of the flange 55a. Furthermore, in some cases, the wall surface 94 is oriented parallel to the inner wall surface 86 of the flange 55b. The same applies to the wall surface 93 and the inner wall surface 86 of the flange 55a.

[0049] Left and right front openings 5a and 5b are provided on the left and right sides of the connecting post 53, through which the left and right zipper teeth 4a and 4b can enter and exit relative to the zipper head 5. On the opposite side of the front openings 5a and 5b in the front-to-back direction, a rear opening 5c ​​is provided, through which the engaged zipper teeth 4a and 4b can enter and exit relative to the zipper head 5. When the zipper head 5 moves forward, the left and right zipper teeth 4a and 4b enter the zipper head 5 through the left and right front openings 5a and 5b, and engage with each other at the position where they have passed the connecting post 53. When the zipper head 5 moves backward, the engaged zipper teeth 4a and 4b enter the zipper head 5 through the rear opening 5c, are separated by the connecting post 53, and then exit the zipper head 5 through the left and right front openings 5a and 5b.

[0050] Furthermore, each flange portion 54a, 54b, 55a, 55b has an outer wall surface 88 extending in the front-rear direction, similar to the inner wall surfaces 85, 86, and a top surface 89 extending between the inner wall surfaces 85, 86 and the outer wall surface 88. Flange portions 54a and 55a are arranged in a mirror-symmetrical manner, defining a through space for the zipper tape 3a between their top surfaces 89. The same applies to flange portions 54b and 55b.

[0051] The front stop 7 has an insertion portion 71 that should be inserted into the zipper pull 5; and a stop portion 72, which has an upper protrusion 73 and a lower protrusion 74 protruding upwards and downwards respectively to prevent the zipper pull 5 from advancing. In some cases, including the example shown in the figure, the insertion portion 71 is the rear part of the front stop 7, and the stop portion 72 is the front part of the front stop 7. In some cases, the width W2” of the insertion portion 71 is less than the distance W2’ between the wall surface 94 and the inner wall surface 86, and equal to or slightly smaller than the left and right width W2 of the zipper teeth 4b. In some cases, the width W3 of the stop portion 72 is greater than the distance W2’ between the wall surface 94 and the inner wall surface 86, and greater than the left and right width W2 of the zipper teeth 4b.

[0052] Not necessarily limited to this, but the upper protrusion 73 has at least one inclined surface (e.g., left and right inclined surfaces 73p, 73q) extending obliquely upward from the upper surface of the insertion portion 71, and the lower protrusion 74 has at least one inclined surface (e.g., left and right inclined surfaces 74p, 74q) extending obliquely downward from the lower surface of the insertion portion 71. The inclined surfaces of the upper protrusion 73 (e.g., left and right inclined surfaces 73p, 73q) are in surface contact with the inclined surfaces of the upper wing plate 51 (e.g., left and right inclined surfaces 58p, 58q), and the inclined surfaces of the lower protrusion 74 (e.g., left and right inclined surfaces 74p, 74q) are in surface contact with the inclined surfaces of the lower wing plate 52 (e.g., left and right inclined surfaces 59p, 59q), thereby increasing the contact area between the two. In some cases, the maximum included angle between the inclined surfaces and the upper or lower surface of the insertion portion 71 is in the range of 20° to 40°, more preferably in the range of 25° to 35°.

[0053] This is not necessarily limited to this, but the inclined surfaces of the upper protrusion 73 (e.g., the left and right inclined surfaces 73p, 73q) and the upper wing plate 51 (e.g., the left and right inclined surfaces 58p, 58q) are formed in a V-shape, for example, by inducing the forward stop 7 into an appropriate position within the pull head 5 as the pull head 5 moves forward. The same applies to the inclined surfaces of the lower protrusion 74 (e.g., the left and right inclined surfaces 74p, 74q) and the lower wing plate 52 (e.g., the left and right inclined surfaces 59p, 59q). For example, the left and right inclined surfaces 73p, 73q are slightly inclined rearward as they extend toward the boundaries of the inclined surfaces 73p, 73q. The same applies to the left and right inclined surfaces 74p, 74q. The left and right inclined surfaces 58p, 58q of the upper wing plate 51 are slightly inclined rearward as they extend toward the boundaries of the inclined surfaces 58p, 58q. The same applies to the left and right inclined surfaces 59p and 59q of the lower wing plate 52.

[0054] The front stop 7 has a first side surface 11 and a second side surface 12 extending in the front-rear direction, and a front surface 13 and a rear surface 14 extending in the left-right direction. The first side surface 11 is located outside the zipper tape compared to the second side surface 12, positioned outside the tape surface of the zipper tape 3b. The second side surface 12 is located inside the zipper tape compared to the first side surface 11, positioned on the tape surface of the zipper tape 3b. When the forward movement of the zipper pull 5 is blocked by the stop 72, the first side surface 11 is located on the side of the connecting post 53 of the zipper pull 5, and the second side surface 12 is located on the side of the flange portions 54b and 55b of the zipper pull 5. Furthermore, the front surface 13 is slightly inclined rearward as it extends outward from the tape, and the rear surface 14 is slightly inclined forward as it extends outward from the tape.

[0055] The first side 11 has a front region 11f and a rear region 11r. The front region 11f is located further forward than the rear region 11r. Although a recess 11m is provided between the front region 11f and the rear region 11r, it can be omitted. The rear region 11r and the front region 11f are flat surfaces extending parallel to the length direction of the zipper tooth tape 2b.

[0056] The second side 12 has a rear region 12r and a front region 12f located further forward than the rear region 12r. The front region 12f extends forward and tilts away from the first side 11 to form a predetermined angle θ with the rear region 12r. The predetermined angle θ is in the range of 5° to 20°, more preferably in the range of 10° to 15°. The rear region 12r includes a flat surface extending parallel to the length direction of the zipper tooth tape 2b. The rear region 12r includes a region oriented parallel to the rear region 11r, but is not necessarily limited to this.

[0057] Furthermore, the width W2” of the front stop 7, defined by the rear region 11r and the rear region 12r, is smaller than the distance W2' between the wall surface 94 and the inner wall surface 86, and is equal to or slightly smaller than the left and right width W2 of the zipper tooth 4b. The width W3 of the front stop 7, defined by the plane PL1 of the front region 11f and / or the rear region 11r and the front region 12f, increases forward with the inclination of the front region 12f until it is larger than the left and right width W2 of the zipper tooth 4b. Similarly, it increases forward until it is larger than the distance W2' between the wall surface 93 of the connecting post 53 and the inner wall surface 86 of the flange portions 54b and 55b.

[0058] like Figure 9 As shown, when the forward movement of the slider 5 is stopped by the stop 72, the front stop 7 is oriented such that the contact portion (a part of the front region 12f) 12g included in the front region 12f of the second side 12 contacts the inner wall surface 86 of the flange portions 54b and 55b, and at least a portion of the rear region 11r of the first side 11 contacts the wall surface 94 of the connecting post 53. The front stop 7 contacts the slider 5 at four points (up, down, left, and right), thus dispersing the stress generated in the front stop 7 and / or the slider 5. Furthermore, the contact portion 12g included in the front region 12f of the second side 12 contacts the inner wall surface 86 of the flange portions 54b and 55b, compared to the case where the front stop 7 contacts the front end 82 of the flange portions 54a and 54b. Figure 12The force exerted by the rear region 11r of the first side 11 on the wall surface 94 of the connecting post 53 is reduced. For example, when the slider 5 is made of resin, the damage to the slider 5 caused by the front stop 7 exerting a localized force on the slider 5 can be avoided or suppressed, such as cracking at the upper or lower end of the connecting post 53 of the slider 5. When the slider 5 is made of metal, the large force locally borne by the resin front stop 7 can also be avoided or suppressed.

[0059] This is not necessarily limited to this, but when the forward movement of the slider 5 is stopped by the stop 72, the inclined surfaces 73p and 73q of the upper protrusion 73 of the stop 72 contact the inclined surfaces 58p and 58q of the upper wing plate 51, and the inclined surfaces 74p and 74q of the lower protrusion 74 of the stop 72 contact the inclined surfaces 59p and 59q of the lower wing plate 52. When the slider 5 is made of resin, the vertical distance between the upper wing plate 51 and the lower wing plate 52 can be widened by the upper protrusion 73 and the lower protrusion 74 of the stop 72. In this case, stress can be generated at the connection between the connecting post 53 and the upper wing plate 51, and similarly, stress can be generated at the connection between the connecting post 53 and the lower wing plate 52.

[0060] When the forward movement of the zipper pull 5 is stopped by the stop 72, the corner 15 of the front stop 7 is positioned in front of the flanges 54b and 55b at a distance from them. The front region 12f of the second side 12 of the front stop 7 can be made less conspicuous than the rear region 12r, allowing the front stop 7 to have an appearance similar to its previous appearance. If the rear region 11r of the first side 11 includes a flat surface extending parallel to the length direction of the zipper chain 2b, this flat surface can contact the wall surface 94 of the connecting post 53.

[0061] When the contact portion 12g contacts the inner wall surface 86 of the flange portions 54b and 55b, the first side surface 11, in addition to contacting the wall surface 94 of the connecting post 53 with its rear region 11r, can also contact the wall surface 94 of the connecting post 53 with a portion of its front region 11f (for example, the edge between the front region 11f and the recess 11m). As a result, the contact area between the connecting post 53 and the first side surface 11 increases.

[0062] exist Figure 11 In the comparative example shown, the second side surface 12 of the front stop 7 is entirely flat. If... Figure 13 The test shown indicates that when the forward movement of the slider 5 is blocked by the stop portion 72 of the front stop 7, it is possible that the left and right sides of the front stop 7 cannot ensure contact with the slider 5.

[0063] exist Figure 12 In the comparative example shown, a stop 72' is provided as a replacement for the stop 72 described above. If... Figure 13In the test shown, with the forward movement of the slider 5 blocked by the stop 72', the stop 72' contacts the front end of the flange 55b, and the first side 11 of the front stop 7 contacts the wall surface of the connecting post 53. Depending on the weight of the weight 100, the connecting post 53 may crack at its upper or lower end due to excessive pressure from the first side 11 of the front stop 7. If the slider 5 is made of metal, it is possible to press the front stop 7 with excessive force from the slider 5 (which can affect the durability or mechanical strength of the front stop 7).

[0064] and Figure 12 In comparison, Figure 9 In the embodiment shown, the distance between position P1 where the front stop 7 contacts the flange 55b and position P2 where the front stop 7 contacts the connecting post 53 is small. Therefore, when the pull head 5 is pulled forward (vertically downward) by the weight 100, the force acting on the connecting post 53 at position P2, with position P1 as the fulcrum, is reduced. In some cases, the state where the pull head 5 is pulled forward with a force of 66N or more and the forward movement of the pull head 5 is stopped by the front stop 7 can last for at least a predetermined time range of 10 seconds.

[0065] like Figure 14 As shown, the front region 12f of the second side 12 can bulge away from the first side 11 as it extends forward, so as to form a predetermined angle θ with the rear region 12r of the second side 12. The predetermined angle θ is defined by the tangent of the front region 12f and the plane in which the rear region 12r exists. The tangent of the front region 12f is determined such that the predetermined angle θ is set to a minimum value. Alternatively, if a flat plane is contained within the front region 12f, a tangent is drawn on the same plane as the plane in which the flat plane exists.

[0066] Based on the foregoing teachings, those skilled in the art can make various modifications to the embodiments. Reference numerals added to the drawings in the claims are for reference only and should not be referenced for the purpose of limiting the interpretation of the claims.

[0067] Explanation of reference numerals in the attached figures

[0068] 1. Zipper; 2a, 2b. Zipper teeth and zipper tape; 3a, 3b. Zipper tape; 4a, 4b. Zipper teeth; 5. Slipper pull; 7. Front stop; 11. First side; 11r. Rear area; 11f. Front area; 12. Second side; 12r. Rear area; 12f. Front area; 51. Upper wing plate; 52. Lower wing plate; 53. Connecting post; 54a, 54b. Flange; 55a, 55b. Flange; 71. Insertion part; 72. Stop part.

Claims

1. A zipper, which is a zipper (1), comprising: A pair of zipper teeth (2a, 2b) is formed by setting zipper teeth (4a, 4b) on opposite side edges (39a, 39b) of zipper tapes (3a, 3b); and The zipper pull (5), which moves forward and backward to engage and disengage the zipper teeth (4a, 4b) of the pair of zipper teeth (2a, 2b), is characterized in that... At least one zipper tooth of the pair of zipper tooth tapes (2a, 2b) has a resin front stop (7) disposed adjacent to the zipper tooth (4b) of the at least one zipper tooth tape (2b). The front stop (7) includes: an insertion portion (71) that should be inserted into the slider (5); a stop portion (72) having an upper protrusion (73) and a lower protrusion (74) that protrude upwards and downwards respectively to prevent the slider (5) from moving forward; a first side (11) located on the connecting post (53) side of the slider (5) when the forward movement of the slider (5) is prevented by the stop portion (72); and a second side (12) located on the flange portion (54b, 55b) side of the slider (5) when the forward movement of the slider (5) is prevented by the stop portion (72). The first and second sides (11, 12) each include at least a rear region (11r, 12r) and a front region (11f, 12f) located further forward than the rear region (11r, 12r). The front region (12f) of the second side (12) is an inclined surface that slopes away from the first side (11) as it extends forward, so as to form a predetermined angle (θ) with the rear region (12r) of the second side (12). When the forward movement of the pull head (5) is blocked by the stop (72), the front stop (7) is oriented such that the contact portion (12g) included in the front region (12f) of the second side (12) contacts the inner wall surface (86) of the flange portion (54b, 55b), and at least a portion of the rear region (11r) of the first side (11) contacts the wall surface (94) of the connecting post (53).

2. The zipper according to claim 1, characterized in that, The rear region (12r) of the second side (12) is a flat surface that extends parallel to the length direction of the at least one zipper tooth strip (2b).

3. The zipper according to claim 1 or 2, characterized in that, The predetermined angle (θ) is in the range of 5° to 20°.

4. The zipper according to claim 1 or 2, characterized in that, The front stop (7) has a front surface (13) and a chamfered corner (15) disposed between the front surface (13) and the second side surface (12). The corner portion (15) is positioned in front of the flange portion (54b, 55b) at a distance from the flange portion (54b, 55b) when the forward movement of the pull head (5) is blocked by the stop portion (72).

5. The zipper according to claim 1 or 2, characterized in that, When the contact portion (12g) contacts the inner wall surface (86) of the flange portion (54b, 55b), the first side surface (11) contacts the wall surface (94) of the connecting post (53) with its rear region (11r) and a portion of its front region (11f).

6. The zipper according to claim 1 or 2, characterized in that, The rear region (11r) of the first side (11) includes a flat surface extending parallel to the length direction of the at least one zipper tooth strip (2b).

7. The zipper according to claim 1 or 2, characterized in that, The connecting post (53) has left and right walls (93, 94) that approach each other as they extend toward the rear end of the connecting post (53), and at least a portion of the rear region (11r) of the first side (11) contacts the wall (94).

8. The zipper according to claim 1 or 2, wherein, The upper protrusion (73) has an inclined surface (73p, 73q) that contacts the inclined surface (58p, 58q) of the lower surface of the upper wing plate (51) of the pull head (5) which is arranged facing forward. The lower protrusion (74) has an inclined surface (74p, 74q) that contacts the inclined surface (59p, 59q) of the upper surface of the lower wing plate (52) of the pull head (5) which is arranged facing forward.

9. The zipper according to claim 1 or 2, characterized in that, With the pair of zipper teeth (2a, 2b) separated, the forward movement of the zipper head (5) can be stopped by the front stop (7) when the zipper head (5) is pulled forward with a force of 66N or more, and the forward movement of the zipper head (5) is stopped by the front stop (7) for a predetermined time range of at least 10 seconds.

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