Double-ended zipper

Abstract

The base bar (60) has a base bar protrusion (65) protruding toward the insert bar (40), and the pull-down head (10B) has a locking claw (25) that can protrude into the chain tooth guide path (17b) and abut against the chain tooth (32). When the pull-down head (10B) is pulled down to the lower end, the locking claw (25) protruding into the chain tooth guide path (17b) is located below the base bar protrusion (65) and overlaps with the base bar protrusion (65) when viewed from the top and bottom.

Description

Technical Field

[0001] This invention relates to a double-ended zipper. Background Technology

[0002] In the past, zippers with opening and closing mechanisms such as levers and inserts were often used to allow the left and right front panels of garments to open and close. Furthermore, zippers primarily used in garments such as long coats and ski suits are known to be designed to improve the functionality and design of clothing. These zippers allow the engagement of the left and right chain teeth to separate from both the top and bottom ends of the chain. Zippers capable of separating the engagement chain teeth from both ends are called double-ended zippers. An example of such a double-ended zipper is disclosed in Japanese Patent Application Publication No. 2008-99975 (Patent Document 1).

[0003] In the zipper of Patent Document 1, the case in which the left and right pairs of zipper teeth engage from the state of being open (separated) to close the zipper teeth together is described.

[0004] First, slide and move the pair of upper and lower sliders of the zipper tooth row installed on a zipper belt to the lower end of the base bar. Next, insert the insert bar relative to the pair of upper and lower sliders that have moved to the lower end. During this insertion operation, the insert bar is inserted from the shoulder opening of the upper slider into the tooth guide path of the upper slider and the tooth guide path of the lower slider. Then, by receiving the locking portion of the base bar into the receiving portion of the insert bar, and fully inserting the insert bar deep into the tooth guide path of the lower slider, the insertion operation is completed. Finally, by sliding the upper slider upwards along the tooth row, the left and right tooth rows can be engaged to close the zipper.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2008-99975 Summary of the Invention

[0008] The problem the invention aims to solve

[0009] In conventional double-ended zippers as described in Patent Document 1, the zipper pull can move freely when the left and right zipper teeth are separated, i.e., in a single-tooth zipper state. Therefore, in the single-tooth zipper state, it is difficult to maintain the state in which the zipper pull is positioned at the lower end of the zipper teeth and the mounting bar is located within the zipper pull's tooth guide path.

[0010] If the sliding head has a large movable area, it may move from the correct position during the opening operation, sometimes failing to properly engage the left and right zipper teeth. In this case, the user needs to move the sliding head to the lower end of the zipper teeth before operating the opening mechanism, which offers room for improvement in operability. Furthermore, considering different user preferences, the possibility of damage to the zipper due to improper operations such as forcibly inserting the insert bar, even when the sliding head is not in the correct position, has also been taken into account.

[0011] The present invention was made in view of the above-mentioned problems, and its object is to provide a double-ended zipper that can keep the pull tab in the proper position in a single-tooth zipper state.

[0012] Solution for solving the problem

[0013] To solve the above problems, the present invention is implemented through the following structure.

[0014] [1] A double-ended zipper (1), the double-ended zipper (1) comprising:

[0015] A pair of zipper teeth (30A, 30B) on the left and right sides;

[0016] Multiple chain teeth (32) are arranged in a mutually opposing manner on the inner edges of the first and second zipper chain tapes (30A, 30B) in the left and right directions;

[0017] Insert rod (40) and seat rod (60) are arranged opposite to each other at the lower ends of the inner edges of the first and second zipper teeth (30A, 30B) in the left and right directions; and

[0018] The upper zipper pull (10A) and the lower zipper pull (10B) are configured with their rear openings (18a, 18b) facing each other in order to open and close the first and second zipper teeth (30A, 30B), characterized in that...

[0019] The seat rod (60) has a seat rod protrusion (65) that protrudes toward the insert rod (40).

[0020] The pull-down head (10B) has a locking claw (25) that can protrude into the chain tooth guide path (17b) and abut against the chain tooth (32).

[0021] With the pull-down head (10B) pulled down to the lower end, the locking claw (25) protruding into the chain tooth guide path (17b) is located below the seat bar protrusion (65) and overlaps with the seat bar protrusion (65) when viewed from the top and bottom.

[0022] Invention Effects

[0023] According to the present invention, a double-ended zipper can be provided that can keep the pull-down head in the proper position when in a single-tooth zipper state. Attached Figure Description

[0024] [ Figure 1 ] Figure 1 This is a front view of a double-ended zipper according to an embodiment of the present invention.

[0025] [ Figure 2 ] Figure 2 This is a diagram showing the state of the inserter being inserted into the top and bottom pull tabs from the side.

[0026] [ Figure 3 ] Figure 3 This is a diagram showing the initial contact state of the insertion rod protrusion and the seat rod protrusion as observed from the side.

[0027] [ Figure 4 ] Figure 4 This is a diagram showing the state of the insertion rod protrusion passing over the seat rod protrusion as viewed from the side.

[0028] [ Figure 5 ] Figure 5 Viewed from below Figure 3 The diagram shows the state at which the protrusion of the insert rod and the protrusion of the base rod begin to make contact, as observed from the side.

[0029] [ Figure 6A ] Figure 6A This is a diagram showing the insertion rod viewed from the side.

[0030] [ Figure 6B ] Figure 6B This is a diagram showing the insertion rod viewed from the inside (right side) in a left-right direction.

[0031] [ Figure 7A ] Figure 7A This is a diagram showing the base of the rod as viewed from the side.

[0032] [ Figure 7B ] Figure 7B This is a diagram showing the base rod viewed from the inside (left side) in the left-right direction.

[0033] [ Figure 7C ] Figure 7C This is a diagram showing the base rod as viewed from below.

[0034] [ Figure 8 ] Figure 8 This is a side view of the pull-down head and base rod viewed from the inside from the left and right sides.

[0035] [ Figure 9 ] Figure 9 This is a diagram showing the pull-down head and base from the back side.

[0036] [ Figure 10 ] Figure 10 This is an enlarged view of the pull-down head and base rod from the side. Detailed Implementation

[0037] Hereinafter, the double-ended zipper of various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0038] In addition, in this instruction manual, "up and down direction" refers to the sliding direction of the zipper head, the length direction of the zipper and zipper teeth, and the insertion and removal direction of the insert bar relative to the zipper head and base bar. "Up and down direction" is... Figure 1 The vertical direction. In the "vertical direction", specifically, the direction in which the upper pull head slides to engage the left and right chain teeth is set as "up", and the direction in which the upper pull head slides to disengage the left and right chain teeth is set as "down". In addition, the direction in which the lower pull head slides to engage the left and right chain teeth is set as "down", and the direction in which the lower pull head slides to disengage the left and right chain teeth is set as "up".

[0039] Additionally, "left-right direction" refers to the direction in which a pair of chain teeth are arranged, which is orthogonal to the sliding direction of the zipper pull. It can also be referred to as the width direction of the zipper, zipper teeth, chain teeth, insert bar, and base bar. "Left-right direction" is... Figure 1 The left and right directions.

[0040] Furthermore, the "back direction" is a direction orthogonal to the up-down and left-right directions, and can also be referred to as the thickness direction of the zipper, zipper teeth, chain teeth, insert bar, and base bar. The "back direction" is... Figure 1 The depth direction of the paper.

[0041] Hereinafter, the double-ended zipper of the present invention will be specifically described with reference to the accompanying drawings. Figure 1 This is a front view of a double-ended zipper according to an embodiment of the present invention.

[0042] Figure 1 The double-ended zipper 1 shown is, for example, a closure component for jackets, long coats, etc., that allows for opening and closing of the left and right front panels. Figure 1 As shown, the double-ended zipper 1 includes: a pair of first and second zipper teeth (hereinafter, the zipper teeth are also referred to as "toothed zipper") 30A and 30B; a plurality of teeth 32 (hereinafter, also referred to as "toothed zipper") arranged opposite each other on the inner edges of the first and second zipper teeth 30A and 30B in the left and right directions; a bar 40 and a base bar 60 arranged opposite each other on the lower ends of the inner edges of the first and second zipper teeth 30A and 30B in the left and right directions; and an upper pull head 10A and a lower pull head 10B, which are arranged with their rear openings 18a and 18b facing each other in the vertical direction in order to open and close the first and second zipper teeth 30A and 30B.

[0043] The first and second zipper belts 30A and 30B respectively include: a long strip-shaped zipper belt (hereinafter also referred to as "belt") 31a and 31b in the vertical direction; a plurality of zipper teeth 32, which are installed along the inner edge of the opening and closing side in the width direction of each belt 31a and 31b; and an upper stop 33, which is installed on the upper part of the inner edge of each belt 31a and 31b to restrict the upper zipper pull 10A from moving upward.

[0044] In the future, the belt 31a constituting the first tooth chain belt 30A may be referred to as the first belt, and the belt 31b constituting the second tooth chain belt 30B may be referred to as the second belt. In this example, the first and second belts 31a and 31b are woven or knitted from polyamide fibers, polyester fibers, acrylic fibers, etc., but are not limited to these. In addition, the chain teeth 32 are not limited to the independent type of each chain tooth, and may also be helical chain teeth.

[0045] exist Figures 2-4 The image shows, in a time series, the state of inserting the plug 40 into the pull heads 10A and 10B while the pull heads 10A and 10B are slid to their lower ends. Figure 2 This is a diagram showing the state of the inserter being inserted into the top and bottom pull tabs from the side. Figure 3 This is a diagram showing the initial contact state of the insertion rod protrusion and the seat rod protrusion as observed from the side. Figure 4 This is a diagram showing the state of the insertion rod protrusion passing over the seat rod protrusion as viewed from the side. Figure 5 Viewed from below Figure 3 The diagram shows the state at which the protrusion of the insert rod and the protrusion of the base rod begin to make contact, as observed from the side.

[0046] like Figure 1 As shown, the upper and lower sliders 10A and 10B respectively include slider bodies 11a and 11b and slider tabs 12a and 12b connected to the slider bodies 11a and 11b. See also... Figures 2-5The zipper pull bodies 11a and 11b each have a front wing plate 13a and 13b disposed on the front side of the first and second tooth chain straps 30A and 30B, and a back wing plate 14a and 14b disposed on the back side of the first and second tooth chain straps 30A and 30B. The front wing plates 13a and 13b and the back wing plates 14a and 14b are connected at their shoulder openings 19a and 19b sides and at their center in the left-right direction by guide posts 15a and 15b extending in the direction of the front and back sides. By providing guide posts 15a and 15b, Y-shaped chain tooth guide paths 17a and 17b that branch towards the shoulder openings 19a and 19b are defined between the front wing plates 13a and 13b and the back wing plates 14a and 14b inside the upper and lower zipper pulls 10A and 10B. The shoulder openings 19a and 19b of the upper and lower zipper pulls 10A and 10B are located on the side of the upper and lower zipper pulls 10A and 10B that moves to engage the zipper teeth of zipper 1 (the side that closes zipper 1). That is, shoulder opening 19a is located at the upper part of the upper zipper pull 10A, and shoulder opening 19b is located at the lower part of the lower zipper pull 10B. The rear openings 18a and 18b of the upper and lower zipper pulls 10A and 10B are located on the side of the upper and lower zipper pulls 10A and 10B that moves to disengage the zipper teeth of zipper 1 (the side that opens zipper 1). That is, rear opening 18a is located at the lower part of the upper zipper pull 10A, and rear opening 18b is located at the upper part of the lower zipper pull 10B.

[0047] Figure 1 Reference numerals 16a and 16b in the attached drawings are pull tab holding parts for connecting pull tabs 12a and 12b, and pull tab holding parts 16a and 16b are protruding from the watch flaps 13a and 13b.

[0048] exist Figure 1 With the lower ends of the first and second chain straps 30A and 30B connected via the insert bar 40 and seat bar 60 (described in detail later), when the user holds the pull tab 12a and moves the upper pull head 10A upward, the left and right chain teeth 32 engage through the chain tooth guide paths 17a and 17b between the watch back flaps 13a and 14a, closing the first and second chain straps 30A and 30B. When the upper pull head 10A is moved downward, the engagement of the left and right chain teeth 32 is disengaged, opening the first and second chain straps 30A and 30B. Conversely, when the user holds the pull tab 12b and moves the lower pull head 10B upward, the engagement of the left and right chain teeth 32 is disengaged, opening the first and second chain straps 30A and 30B. When the pull-down head 10B is moved downward, the left and right chain teeth 32 pass through the chain tooth guide paths 17a and 17b between the back wing plates 13b and 14b and engage, closing the first and second chain teeth 30A and 30B.

[0049] The outer wing plates 13a, 13b or the back wing plates 14a, 14b have flanges extending in the direction of the outer wing plate in the left and right directions. In this embodiment, the flanges include outer wing plate flanges that protrude from the outer wing plates 13a, 13b in the left and right directions toward the back wing plates 14a, 14b (back side). Figures 2-4 Not illustrated in the image. (To be continued in the following sections...) Figure 8 (Partial illustration) and the back wing flanges 21a and 21b protruding from the left and right edges of the back wing plates 14a and 14b toward the outer wing plates 13a and 13b (outer side).

[0050] The back wing flange portions 21a and 21b include: straight flange portions 21c and 21d, which are disposed on the rear openings 18a and 18b and extend in a straight line in the vertical direction; and inclined flange portions 21e and 21f, which are connected to the straight flange portions 21c and 21d and are inclined outward in the left-right direction as they approach the shoulder openings 19a and 19b. Although not shown, the outer wing flange portions have a shape that is substantially symmetrical to the back wing flange portions 21a and 21b in the back-facing direction. Therefore, similar to the back wing flange portions 21a and 21b, the outer wing flange portions include: straight flange portions (not shown), which are disposed on the rear openings 18a and 18b and extend in a straight line in the vertical direction; and inclined flange portions (not shown), which are connected to the straight flange portions and are inclined outward in the left-right direction as they approach the shoulder openings 19a and 19b.

[0051] In this embodiment, the upper and lower pull tabs 10A and 10B have approximately the same shape. When the upper pull tab 10A is rotated 180° in a plane orthogonal to the direction of the watch back, it becomes the shape of the lower pull tab 10B. Therefore, in such a way... Figures 2-5 When the upper and lower pull heads 10A and 10B come into contact with each other, the chain tooth guide paths (rear openings 18a and 18b) of the upper and lower pull heads 10A and 10B are connected to each other.

[0052] Furthermore, the straight flange portion of the watch wing plate flange faces the straight flange portions 21c and 21d of the back wing plate flange portions 21a and 21b with a gap in the watch back direction, and the inclined flange portion of the watch wing plate flange faces the inclined flange portions 21e and 21f of the back wing plate flange portions 21a and 21b with a gap in the watch back direction. The gaps between these watch wing plate flange portions and the back wing plate flange portions 21a and 21b in the watch back direction are the minimum gaps between the watch back wing plates 13a, 13b, 14a, and 14b. This minimum gap is smaller than the maximum thickness of the chain teeth 32, the insert bar 40, and the seat bar 60 in the watch back direction, and larger than the thickness of the first and second bands 31a and 31b. This prevents the left and right chain teeth 32, insert bar 40 and seat bar 60 from falling off the chain tooth guide paths 17a and 17b of the upper and lower pull heads 10A and 10B, and allows the upper and lower pull heads 10A and 10B to slide on the surface and back of the first and second belts 31a and 31b.

[0053] Next, the insert rod 40 and the seat rod 60 will be described. The insert rod 40 and the seat rod 60 are formed, for example, by injection molding or extrusion molding of thermoplastic resins such as polyacetal, polyamide, polypropylene, and polybutylene terephthalate relative to the lower ends of the left and right inner edges of the left and right strips 31a and 31b. Furthermore, the lower ends of the left and right strips 31a and 31b for which the insert rod 40 and the seat rod 60 are formed can also be reinforced sections reinforced with thermoplastic resin. The reinforced sections are formed by fusing a thermoplastic resin film such as polyamide or polyethylene to the lower ends of the left and right strips 31a and 31b using ultrasonic processing or the like, or by allowing a thermoplastic resin liquid to penetrate and solidify relative to these lower ends.

[0054] Insert rod 40 and seat rod 60 can be connected and disconnected from each other. Figure 1 The diagram shows the disconnected state of the insertion rod 40 and the seat rod 60. Figures 2-5 The connection status of the insert bar 40 and the seat bar 60 is shown in magnified view within the chain tooth guide paths 17a and 17b of the upper and lower pull heads 10A and 10B.

[0055] like Figure 1 As shown, the lower end of the insert bar 40 is positioned below the chain tooth 32 on the inner edge of the first zipper tooth strip 30A in the left-right direction, forming a slender rod shape along the first strip 31a. In order to facilitate the insertion of the insert bar 40 from the oblique upper direction relative to the chain tooth guide paths 17a and 17b of the upper and lower zipper pulls 10A and 10B, the upper and lower ends of the insert bar 40 are bent to the left (opposite to the base bar 60), and when viewed from the back direction, the insert bar 40 as a whole becomes an arc shape.

[0056] Figure 6A This is a diagram showing the insertion rod viewed from the side. Figure 6B This is a diagram showing the insertion rod viewed from the inside (right side) in a left-right direction.

[0057] like Figure 6A and Figure 6B As shown, the insert 40 has a surface 40A and a back surface 40B that are generally flat surfaces, left and right inner sides 40C (sides on the left and right center sides of the zipper 1) and left and right outer sides 40D, as well as an upper side 40E and a lower side 40F.

[0058] The left and right outer sides 40D of the insert bar 40 are the parts that slide in contact with the flanges (front wing flange and back wing flange 21a, 21b) of the upper and lower wing heads 10A, 10B when the insert bar 40 is inserted into the chain tooth guide paths 17a, 17b of the upper and lower wing heads 10A, 10B.

[0059] A concave locking recess 41 is formed on the upper part of the left and right inner sides 40C of the insert 40, near the back side 40B. For example... Figures 2-5 As shown, the locking recess 41 is used to engage with the locking protrusion 61 of the seat bar 60 (described later) when the insert bar 40 is inserted into the chain tooth guide paths 17a, 17b of the pull heads 10A, 10B which are configured at the lowest end, so that the insert bar 40 stops at the lowest end.

[0060] On the upper part of the left and right inner sides 40C of the insert rod 40, on the surface 40A side near the locking recess 41, a bulge 42 is formed that protrudes in the left and right directions. Viewed from the back, the bulge 42 is approximately triangular in shape. The left and right inner sides 42a of the bulge 42 are wedge-shaped, with their width gradually increasing upwards. Thus, the left and right inner sides 42a of the bulge 42 function as a guide surface that slides into contact with the guide post 15b of the pull-down head 10B when the pull-down head 10B slides upwards from its lowest point, thereby opening the insert rod 40 to the left.

[0061] A meshing protrusion 43 is formed on the inner side of the upper side 40E of the insert 40 in the left-right direction. This meshing protrusion 43 has a meshing recess 32a provided with the meshing head of the zipper tooth 32 at the lowermost end of the second zipper tooth belt 30B (see reference). Figure 1 ) meshing.

[0062] Also refer to Figure 5 At the lower end of the surface 40A of the insertion rod 40, a lower end inclined surface 44 is formed, which causes the surface 40A to gradually tilt towards the back side 40B as it moves downward. When the insertion rod 40 is inserted into the pull-up heads 10A and 10B, the lower end inclined surface 44, which becomes the foremost point, functions as a guide surface, thus enabling a smooth insertion operation.

[0063] The dimension of the lower portion 48 of the insert 40 in the face-back direction decreases as it approaches the base bar 60 (inner side in the left-right direction). Here, the lower portion 48 of the insert 40 refers to the portion lower than the insert protrusion 45 described later. By cutting off the inner side (right side) of the face-side portion of the lower portion 48 of the insert 40 to provide a clearance portion 46, the dimension of the lower portion of the insert 40 in the face-back direction decreases as it approaches the base bar 60. Therefore, when the insert 40 is inserted from the lower portion 48 side, the lower portion 48 is less likely to come into contact with the base bar protrusion 65 described later, thus improving the insertion performance of the insert 40. In addition, by providing the clearance portion 46 on the surface of the lower portion 48, when the insert 40 is inserted, it is possible to suppress the locking claw 25 protruding from the face plate 13b into the chain guide path 17b (see reference). Figure 8 and Figure 9 )put one's oar in.

[0064] By providing the clearance portion 46 as described above, a surface inclined surface 47 is formed on the inner side of the lower part 48 of the insert rod 40 in the left-right direction, which slopes towards the back side as it moves toward the seat rod 60 (inner side in the left-right direction). See also Figure 5 The surface inclined surface 47 of the lower part 48 of the insertion rod 40 faces the back inclined surface 68 of the back side of the seat rod protrusion 65 (described later). Therefore, the surface inclined surface 47 of the insertion rod 40 and the back inclined surface 68 of the seat rod protrusion 65 can abut and guide each other, allowing for smooth insertion of the insertion rod 40. Furthermore, the shape of the surface inclined surface 47 is not particularly limited, as long as it is inclined; it can be a wedge shape or a curved shape. The inclination angle of the surface inclined surface 47 relative to the surface / back direction is preferably 40° to 60°. By setting such an inclination angle, interference between the surface inclined surface 47 of the insertion rod 40 and the seat rod protrusion 65 can be mitigated when the insertion rod 40 is inserted.

[0065] like Figure 1 As shown, the lower end of the base bar 60 is positioned below the chain tooth 32 on the inner edge of the second zipper tooth strip 30B in the left-right direction, forming a slender rod shape along the second strip 31b. In order to facilitate the insertion of the chain tooth guide paths 17a, 17b of the upper and lower zipper pulls 10A, 10B from the upper and lower sides relative to the base bar 60 from the upper and lower sides, the upper and lower ends of the base bar 60 are bent to the right (opposite to the insert bar 40), and the base bar 60 as a whole becomes an arc shape.

[0066] like Figures 2-5 As shown, the base bar 60 can position the pull tab 10B at the bottom end of the second zipper tooth chain 30B, and can be positioned by connecting the bottom end to the insert bar 40 inserted into the tooth guide paths 17a, 17b of the upper and lower pull tabs 10A, 10B already positioned at the bottom end. Furthermore, the pull tab 10B is positioned closer to the insert bar 40 and base bar 60 than the upper pull tab 10A. Additionally, the upper and lower pull tabs 10A and 10B are arranged with their rear openings 18a, 18b facing each other.

[0067] Figure 7A This is a diagram showing the base of the rod as viewed from the side. Figure 7B This is a diagram showing the base rod viewed from the inside (left side) in the left-right direction. Figure 7C This is a diagram showing the base rod as viewed from below.

[0068] like Figures 7A-7C As shown, the seat bar 60 has a surface 60A and a back surface 60B that are generally flat surfaces, left and right inner sides 60C (sides on the left and right center sides of the zipper 1) and left and right outer sides 60D, as well as an upper side 60E and a lower side 60F.

[0069] The left and right outer sides 60D of the seat bar 60 are the parts that slide in contact with the flanges (front wing flange and back wing flange 21a, 21b) of the upper and lower pull heads 10A and 10B when the upper and lower pull heads 10A and 10B are slid to the lowest position of the end position of the seat bar 60.

[0070] Stops 62a and 62b protruding toward the back of the watch are provided at the lower ends of the surface 60A and back 60B of the base rod 60, respectively. These stops 62a and 62b abut against the watch flap 13b and back flap 14b of the pull-down head 10B to prevent the pull-down head 10B from falling off from below.

[0071] The left and right inner sides 60C of the base bar 60 are located on the opposite side to the left and right outer sides 60D, and are opposite to the insert bar 40. At the upper end of the left and right inner sides 60C, near the back surface 60B, a locking protrusion 61, which appears triangular when viewed from the back of the watch, protrudes to the left (towards the insert bar 40). The locking protrusion 61 is used to engage with the locking recess 41 of the insert bar 40 when the insert bar 40 is inserted into the chain guide paths 17a and 17b of the lower pull tabs 10A and 10B, which are positioned at the lowest point, thereby stopping the insert bar 40 at its lowest point. Therefore, the locking protrusion 61 of the base bar 60 and the locking recess 41 of the insert bar 40 have similar shapes.

[0072] The upper surface 61a of the locking protrusion 61, where the chain tooth 32 is located, is generally planar. The inclined surface 61b of the locking protrusion 61, which is opposite to the insert bar 40, gradually increases in size from the width of the locking protrusion 61 upwards. Moreover, the inclined surface 61b functions as an inclined guide surface that slides into contact with the guide post 15b of the pull-down head 10B when the pull-down head 10B slides upwards from its lowest point, thereby opening the seat bar 60 to the right.

[0073] Next, the insertion protrusion 45 of the insertion rod 40 and the seat protrusion 65 of the seat rod 60 will be described.

[0074] like Figures 6A-6BAs shown, the left and right inner sides 40C of the insertion rod 40 have insertion rod protrusions 45 that protrude towards the base rod 60. The insertion rod protrusions 45 are located on the side of the left and right inner sides 40C closest to the surface 40A, but not on the side closest to the back surface 40B. Therefore, when the insertion rod 40 is inserted into the pull heads 10A and 10B, the insertion rod protrusions 45 will not interfere with the locking protrusion 61 located on the back surface 60B side of the upper end of the base rod 60. The top 45a of the insertion rod protrusions 45 is located below the middle portion of the insertion rod 40 in the vertical direction. More specifically, the top 45a of the insertion rod protrusions 45 is closer in the vertical direction to the bisecting line L1 that divides the insertion rod 40 into two equal parts in the vertical direction than the upper side 40E and the lower side 40F. Thus, in the bow-shaped insert 40, the insert protrusion 45 is formed near the center in the vertical direction of the insert 40, thereby achieving a shape that is advantageous in terms of strength.

[0075] The insertion protrusion 45 includes an upper inclined surface 45b forming a surface higher than the top 45a and a lower inclined surface 45c forming a surface lower than the top 45a. The upper inclined surface 45b is connected to the upper part of the top 45a and is inclined in a manner that extends away from the top 45a towards the upper side and towards the side (left side) away from the base 60. The lower inclined surface 45c is connected to the lower part of the top 45a and is inclined in a manner that extends away from the top 45a towards the upper side and towards the side (left side) away from the base 60. Here, the inclination of the lower inclined surface 45c relative to the vertical direction is greater than the inclination of the upper inclined surface 45b relative to the vertical direction.

[0076] Therefore, from Figure 4 When the insertion is completed and the insertion rod 40 is pulled upward, the upper inclined surface 45b with a smaller inclination in the insertion rod protrusion 45 contacts the seat rod protrusion 65. Therefore, the insertion rod 40 can be smoothly pulled out by gently guiding the insertion rod through the upper inclined surface 45b.

[0077] A receiving portion 49 is provided on the insert rod 40 at a position higher than the insert rod protrusion 45, capable of accommodating the seat rod protrusion 65. In this embodiment, the receiving portion 49 is located on the left and right inner side surfaces 40C, in a region higher than the insert rod protrusion 45 and lower than the bulge 42, near the surface 40A. Figure 4 As shown, when the insertion rod protrusion 45 passes over the seat rod protrusion 65 to complete the insertion of the insertion rod 40, the seat rod protrusion 65 is received in the receiving portion 49 of the insertion rod 40. In the illustrated example, the receiving portion 49 is generally planar, but the shape of the receiving portion 49 is not particularly limited as long as it can substantially receive the seat rod protrusion 65, for example, it can also be concave.

[0078] like Figures 7A-7CAs shown, the left and right inner sides 60C of the base rod 60 are provided with base rod protrusions 65 that protrude toward the insertion rod 40. The base rod protrusions 65 are located on the left and right inner sides 60C near the surface 60A.

[0079] As described above, the insertion protrusion 45 is located on the side of the insertion rod 40 closest to surface 40A, and similarly, the seat protrusion 65 is also located on the side of surface 60A. Furthermore, when the insertion rod 40 is inserted, the insertion protrusion 45 and the seat protrusion 65 overlap at least partially when viewed from the insertion / removal direction (vertical direction) of the insertion rod 40. Therefore, when the insertion rod 40 is inserted, the insertion protrusion 45 contacts the seat protrusion 65. Moreover, since the insertion protrusion 45 and the seat protrusion 65 push against each other in the vertical and horizontal directions, they never overlap in the back view (they do not overlap when viewed from the back view).

[0080] The seat rod protrusion 65 is located at the midpoint of the seat rod 60 in the vertical direction. More specifically, the top 65a of the seat rod protrusion 65 is closer in the vertical direction to the bisecting line L2 that divides the seat rod 60 into two equal parts in the vertical direction than the upper side 60E and the lower side 60F. In the illustrated example, the top 65a of the seat rod protrusion 65 is located slightly above the bisecting line L2. Thus, in the seat rod 60, which is designed with an arcuate shape, forming the seat rod protrusion 65 near the midpoint of the seat rod 60 in the vertical direction results in a shape that is advantageous in terms of strength.

[0081] In addition, refer to the following Figures 2-4 Describe the insertion process of the insertion rod 40 by pulling up and down the heads 10A and 10B, but... Figure 4The diagram shows the inserted rod 40 in the completed insertion state. In this completed insertion state, the top 65a of the rod protrusion 65 is positioned vertically in the same direction as a portion of the straight flanges 21c and 21d of the upper and lower pull heads 10A and 10B. Specifically, preferably, the top 65a of the rod protrusion 65 is located vertically between the straight line L3 extending horizontally from the upper end of the straight flange 21c of the upper pull head 10A and the straight line L4 extending horizontally from the lower end of the straight flange 21d of the lower pull head 10B. In the illustrated example, the top 65a of the rod protrusion 65 is positioned vertically in the same direction as the lower part of the straight flange 21d of the lower pull head 10B. This configuration ensures that the rod protrusion 65, in the arc-shaped rod 60, is formed near the center of the rod in the vertical direction, thus providing a shape advantageous in terms of strength. Furthermore, the top 65a of the seat bar protrusion 65 is positioned at the narrowest straight portion of the chain guide paths 17a and 17b, thus enabling a click-like feel by reliably abutting the insert protrusion 45 and the seat bar protrusion 65. Additionally, to achieve this click-like feel, the seat bar protrusion 65 needs to be sized to reliably abut against the insert protrusion 45; however, since the top 65a of the seat bar protrusion 65 is positioned at the narrowest straight portion of the chain guide paths 17a and 17b, it also has the advantage that the size of the seat bar protrusion 65 does not need to be increased beyond the necessary size.

[0082] The seat protrusion 65 includes an upper inclined surface 65b forming a surface higher than the top 65a and a lower inclined surface 65c forming a surface lower than the top 65a. The upper inclined surface 65b is inclined toward the insertion rod 40 side (left side) as it extends downward from the upper end of the seat protrusion 65. The lower inclined surface 65c is inclined toward the side opposite to the insertion rod 40 (right side) as it extends downward from the top 65a of the seat protrusion 65. Here, the inclination of the lower inclined surface 65c relative to the vertical direction is greater than the inclination of the upper inclined surface 65b relative to the vertical direction.

[0083] Therefore, when the insert 40 is inserted, the upper inclined surface 65b of the insert protrusion 45 and the seat protrusion 65 with a smaller inclination is in contact. After passing the upper inclined surface 65b of the seat protrusion 65, the contact is abruptly released or reduced by the lower inclined surface 65c with a larger inclination. As a result, a greater clicking sensation can be obtained.

[0084] The dimension of the base protrusion 65 in the front-back direction decreases as it approaches the insertion rod 40 (inner left-right direction), resulting in a tapered shape. More specifically, a back-side clearance portion 66 is provided by cutting away the inner left-right direction of the back side portion of the base protrusion 65, and a front-side clearance portion 67 is provided by cutting away the inner left-right direction of the front side portion of the base protrusion 65. This causes the dimension of the base protrusion 65 in the front-back direction to decrease as it approaches the insertion rod 40. Consequently, when the insertion rod 40 is inserted, it is less likely to collide with the base protrusion 65, thus improving the insertion performance of the insertion rod 40.

[0085] By providing the back-side clearance portion 66 as described above, a back-side inclined surface 68 is formed on the back side of the seat rod protrusion 65, which slopes towards the front side as it moves toward the insertion rod 40. See also Figure 5 The back side inclined surface 68 of the back of the seat rod protrusion 65 is opposite to the front side inclined surface 47 of the lower part 48 of the insertion rod 40. Therefore, the front side inclined surface 47 of the insertion rod 40 and the back side inclined surface 68 of the seat rod protrusion 65 can abut and guide each other, thereby allowing the insertion rod 40 to be inserted smoothly.

[0086] Furthermore, by providing the surface clearance portion 67, a surface inclined surface 69 is formed on the surface of the base bar protrusion 65, which slopes towards the back as it moves toward the insertion bar 40. This surface inclined surface 69 is located in a position visible to the user, thus enhancing the design aesthetics of the base bar 60. Additionally, when the pull-down head 10B is pulled upwards, the tip portion 25a of the locking claw 25 may be present (see reference). Figure 9 and Figure 10 Even if the chain guide path 17b does not completely avoid the surface, the locking pawl 25 can still avoid the surface by guiding the tip 25a of the locking pawl 25 using the inclined surface 69. Therefore, the pulling action of the pull-down head 10B becomes smooth.

[0087] Furthermore, the shapes of the back-side inclined surface 68 and the front-side inclined surface 69 are not particularly limited, as long as they are inclined; they can be wedge-shaped or curved. The inclination angle of the back-side inclined surface 68 relative to the back of the watch face is preferably 30° to 55°. By setting such an inclination angle, interference between the back-side inclined surface 68 of the base bar 60 and the front-side inclined surface 47 of the base bar 40 can be mitigated when the insert bar 40 is inserted. The inclination angle of the front-side inclined surface 69 relative to the back of the watch face is preferably 2° to 25°. By setting such an inclination angle, interference between the front-side inclined surface 69 of the base bar 60 and the locking pawl 25, and interference between the front-side inclined surface 69 and the guide post 15a of the pull-up head 10A can be suppressed, and the appearance of the base bar 60 can be improved.

[0088] Next, refer to Figures 2-4 The connection between the insert 40 and the base 60 will be explained.

[0089] When connecting the insert 40 to the base 60, firstly, as follows: Figure 2 As shown, pull down the upper and lower zipper pulls 10A and 10B to their lowest positions. In this state, the base bar 60 is located within the zipper tooth guide paths 17a and 17b of the upper and lower zipper pulls 10A and 10B. Furthermore, the top 65a of the base bar protrusion 65 protrudes towards the insertion bar 40 from the left-right center M of the zipper 1. In this state, with the lower side 40F as the leading edge, insert the insertion bar 40 starting from the shoulder opening 19a of the upper zipper pull 10A.

[0090] As the insertion rod 40 continues to be inserted, the insertion rod protrusion 45 contacts the seat rod protrusion 65, which protrudes towards the insertion rod 40 from the center M in the left-right direction. Sometimes, the contact state between the insertion rod protrusion 45 and the seat rod protrusion 65 when the insertion rod protrusion 45 is about to pass over the seat rod protrusion 65 is referred to as the first state. Figure 3 The diagram shows the top 45a of the insert protrusion 45 contacting the upper inclined surface 65b of the seat protrusion 65.

[0091] Here, as described above, since the protrusion 65 of the zipper bar protrudes towards the insertion rod 40 from the left-right center M of the zipper 1, the insertion and removal of the insertion rod 40 can be performed more smoothly compared to the case where the protrusion 45 of the insertion rod protrudes towards the zipper bar 60 from the left-right center M. For example, if the protrusion 45 of the insertion rod protrudes towards the zipper bar 60 from the left-right center M, the protrusion 45 of the insertion rod needs to be made larger, and therefore, when the insertion and removal of the insertion rod 40, it may get caught on the guide post 15a of the upper zipper 10A, etc.

[0092] In addition, Figure 4 In the inserted state shown, the top 45a of the protrusion 45 is located closer to the protrusion 40 than the center M of the zipper 1 in the left-right direction. This allows for smooth insertion and removal of the protrusion 40.

[0093] Furthermore, the left-right width of the base protrusion 65 is greater than the left-right width of the insertion protrusion 45. According to this structure, compared to the case where the insertion protrusion 45 protrudes significantly more than the base protrusion 65 in the left-right direction, the insertion and removal of the insertion rod 40 can be performed more smoothly.

[0094] When from Figure 3 When inserting the plug 40 further from the first state (contact state), as... Figure 4As shown, the insertion protrusion 45 passes over the base protrusion 65, transitioning to a second state where the contact state is released or reduced, and the base protrusion 65 is retracted into the storage portion 49. Therefore, through the resistance and sound of the insertion protrusion 45 passing over the base protrusion 65, the user can obtain an insertion feel, such as a click, and can appropriately recognize that the insertion protrusion 40 has been inserted into the base 60. Furthermore, in the illustrated example, the second state where the base protrusion 65 is retracted into the storage portion 49 can be considered roughly equivalent to the insertion completion state where the insertion protrusion 40 is inserted to its lowest point.

[0095] The insertion protrusion 45 and the seat protrusion 65 never overlap in the direction of the dial back from the beginning of insertion of the insertion rod 40 until the insertion is completed. In other words, the insertion protrusion 45 and the seat protrusion 65 can reliably push against each other in the up-down or left-right direction to produce a clicking sensation.

[0096] In particular, when the insertion rod 40 is inserted, the upper inclined surface 65b of the insertion rod protrusion 45 and the seat rod protrusion 65 with a smaller inclination is in contact. After passing the upper inclined surface 65b of the seat rod protrusion 65, the contact is abruptly released or reduced by the lower inclined surface 65c with a larger inclination. As a result, a greater clicking sensation can be obtained.

[0097] Conversely, when the insert 40 is pulled out, the upper inclined surface 45b of the insert protrusion 45 with a smaller inclination contacts the seat protrusion 65, thus allowing the insert 40 to be pulled out smoothly.

[0098] Furthermore, as described above, the top 65a of the stem protrusion 65 is located at the same position in the vertical direction as a portion of the straight flange portions 21c and 21d of the upper and lower pull heads 10A and 10B. Therefore, the top 65a of the stem protrusion 65 is located near the center of the upper and lower pull heads 10A and 10B in the vertical direction (near the rear openings 18a and 18b). Thus, after the insertion rod 40 is inserted through the shoulder opening 19a of the upper pull head 10A, it will pass over the stem protrusion 65 at a certain speed, thus achieving both smooth insertion and a clicking sensation.

[0099] Furthermore, since the top 65a of the base protrusion 65 is located near the narrowest rear openings 18a and 18b of the chain tooth guide paths 17a and 17b of the upper and lower pull tabs 10A and 10B, the top 65a of the base protrusion 65 can be configured to be close to the insert rod 40. Therefore, contact and interference between the insert rod protrusion 45 and the base protrusion 65 when the insert rod 40 is inserted can be reliably generated, and a more reliable click sensation can be obtained.

[0100] Furthermore, if the top 65a of the base protrusion 65 is formed near the inclined flange 21e of the pull tab 10A (above the straight line L3), the insert rod 40 will interfere with the base protrusion 65 immediately after being inserted into the pull tab 10A, potentially impairing smooth insertion. Additionally, since this is a location with a relatively large width of the chain guide path 17a, it is possible that the insert rod protrusion 45 will not make contact with the base protrusion 65 when the insert rod 40 is inserted, requiring an increase in the size of the base protrusion 65 to achieve this contact. However, this embodiment does not exclude the use of this structure as long as the above problems can be solved.

[0101] Furthermore, when the top 65a of the seat bar protrusion 65 is formed near the inclined flange 21f of the pull-down head 10B (located below the straight line L4), since this is a position where the width of the chain tooth guide path 17b is relatively large, it is possible that the contact between the insert bar protrusion 45 and the seat bar protrusion 65 when the insert bar 40 is inserted may not occur, requiring the seat bar protrusion 65 to be enlarged to generate this contact. However, this embodiment does not exclude the use of this structure as long as the above problem can be solved.

[0102] Furthermore, in the inserted state, the top 45a of the protrusion 45 is located near the center of the pull tabs 10A and 10B in the vertical direction (near the rear openings 18a and 18b). Thus, in the protrusion 40, which is generally designed to be arc-shaped to match the shape of the pull tabs 10 and 10B, the protrusion 45 is formed near the center of the protrusion 40 in the vertical direction, which is most advantageous in terms of strength.

[0103] In addition, such as Figure 4 As shown, when the left-right width of the base rod 60 at the top 65a of the base rod protrusion 65 is set as A, the left-right width of the insert rod 40 at the top 45a of the insert rod protrusion 45 is set as B, and the left-right width of the interior (chain tooth guide paths 17a, 17b) of the upper and lower pull heads 10A, 10B at the straight flange portions 21c, 21d is set as C, A+B>C. Therefore, when the insert rod 40 is inserted, the insert rod protrusion 45 located near the straight flange portions 21c, 21d will inevitably contact the base rod protrusion 65, thus reliably obtaining a clicking sensation. In addition, after the insert rod 40 is inserted, the locking state of the insert rod protrusion 45 and the base rod protrusion 65 can be maintained.

[0104] In addition, such as Figure 4 As shown, when the width of the base bar 60 in the left-right direction at the top 65a of the base bar protrusion 65 is set to A, and the minimum width of the interior (chain tooth guide path 17a, 17b) of the upper pull head 10A or lower pull head 10B between the inclined flange portion 21e and the guide posts 15a, 15b is set to D, D>A. Therefore, the upper and lower pull heads 10A, 10B can slide to the bottom of the zipper 1 while the base bar 60 passes through the interior.

[0105] Figure 8 It is a side view of the slider and the seat bar observed from the inner side in the left - right direction. Figure 9 It is a view of the slider and the seat bar observed from the dorsal side. Figure 10 It is an enlarged view of the slider and the seat bar observed from the front side. Additionally, in Figure 8 the illustration of the part of the slider 10B on the back - side of the central part in the front - back direction is omitted. Additionally, in Figure 9 and Figure 10 the state where the slider 10B is at the lower end is shown, but in FIG. 11, the state where the slider 10B is at a position slightly above the lower end is shown. That is, the slider 10B can move further downward from the state shown in FIG. 11. Additionally, in Figure 10 compared with Figure 8 and Figure 9 the illustration of the cover 24 and the locking claw 25 is omitted.

[0106] As Figure 8 and Figure 9 shown, on both left - right edges of the front wing plate 13b of the slider 10B, there are front wing plate flange portions 20b extending in the front - back direction. The front wing plate flange portion 20b includes: a straight flange portion 20d, which is arranged on the side of the rear mouth 18b and extends linearly in the up - down direction; and an inclined flange portion 20f, which is connected to the straight flange portion 20d and inclines outward in the left - right direction as it goes toward the shoulder mouths 19a, 19b.

[0107] As Figure 8 and Figure 10 shown, the tab holding portion 16b includes: upper mounting posts 22 and lower mounting posts 23, which are respectively erected on the upper and lower parts of the surface of the front wing plate 13b; and a cover 24, which is arranged so as to straddle the upper mounting post 22 and the lower mounting post 23. Moreover, a locking claw 25 is housed between the upper mounting post 22 and the lower mounting post 23.

[0108] The cover 24 covers the upper mounting post 22 and the lower mounting post 23 and is fixed by clamping (Japanese: 加締め). As Figure 9 and Figure 10 shown, in the front wing plate 13b, a claw insertion hole 26 for inserting the tip portion 25a of the locking claw 25 is formed so as to penetrate the front wing plate 13b in the front - back direction. The tip portion 25a of the locking claw 25 inserted into the claw insertion hole 26 reaches inside the tooth guide path 17b. In Figure 8 the situation where the tip portion 25a of the locking claw 25 reaches a position on the back - side of the front wing plate flange portion 20b is shown. By inserting such a locking claw 25 between the teeth 32 and making it abut against the teeth 32, the movement of the slider 10B is restricted.

[0109] Between the upper mounting post 22 and the lower mounting post 23, a leaf spring (not shown) is disposed on the surface of the locking pawl 25, and the shaft portion (not shown) of the pull tab 12b is disposed on the back side of the locking pawl 25. The leaf spring is a generally rectangular plate extending in the vertical direction and is fixed to the locking portions (not shown) formed on the upper and lower parts of the back of the cover 24. Thus, the pull tab holding part 16b of this embodiment is composed of the upper mounting post 22, the lower mounting post 23, the cover 24, the locking pawl 25, and the leaf spring.

[0110] Thus, the pull-down head 10B is a pull-down head with an automatic stop function and a locking claw 25. Although not shown, the pull-up head 10A is also a pull-down head with an automatic stop function and the same structure as the pull-down head 10B.

[0111] from Figure 10 The state shown causes the pull-down head 10B to move further downwards, as shown in the image. Figure 8 and Figure 9 With the pull-down head 10B pulled down to its lower end, the claw insertion hole 26 is located below the seat bar protrusion 65. The locking claw 25, protruding from the claw insertion hole 26 into the chain tooth guide path 17b, is also located below the seat bar protrusion 65.

[0112] And, as Figure 8 and Figure 9 As shown, the locking claw 25 is positioned to overlap with the base bar protrusion 65 when viewed from the top and bottom. That is, the locking claw 25 has portions overlapping with the base bar protrusion 65 in both the left-right direction and the front-back direction. Because the locking claw 25 and the base bar protrusion 65, protruding into the zipper tooth guide path 17b, are positioned in abutment in the top and bottom direction, even when the pull-down head 10B moves upward from its lower position, the locking claw 25 and the base bar protrusion 65 will abut and restrict the pull-down head 10B from moving upward. Therefore, even in the single-tooth zipper tape state where the first and second zipper teeth 30A and 30B are separated, the movement of the pull-down head 10B can be restricted, and the pull-down head 10B can be held in an appropriate position, such as at the lower end of the second zipper tooth zipper tape 30B.

[0113] In such Figure 8 and Figure 9 When the pull-down head 10B is pulled down to its lower end, if the base protrusion 65 is positioned above the upper end (rear opening 18b) of the pull-down head 10B, the amount of movement of the pull-down head 10B will be greater, which is not preferable. However, in this embodiment, the base protrusion 65 is positioned below the upper end (rear opening 18b) of the pull-down head 10B, so the amount of movement of the pull-down head 10B can be limited less by the base protrusion 65.

[0114] The seat bar protrusion 65 has a lower inclined surface 65c that forms a surface lower than the top 65a. This lower inclined surface 65c is located at a position that abuts against the locking claw 25 protruding into the chain tooth guide path 17b in the vertical direction. In the illustrated example, the lower inclined surface 65c has an inclination angle of approximately 40° relative to the vertical direction.

[0115] In addition, the seat protrusion 65 protrudes from the center M in the left-right direction toward the insertion rod 40 (see reference). Figure 2 The lower inclined surface 65c of the base rod protrusion 65 and the guide post 15b of the pull-down head 10B are located at an overlapping position when viewed from the vertical direction. Therefore, when the user pulls the pull-down head 10B upward, the guide post 15b of the pull-down head 10B interferes with the base rod protrusion 65, and the upward pull of the pull-down head 10B may become unsmooth. However, in this embodiment, the lower surface of the base rod protrusion 65 that is opposite to the guide post 15b in the vertical direction is set as the lower inclined surface 65c. Therefore, the guide post 15b is guided by the lower inclined surface 65c as it passes over the base rod protrusion 65, and the upward pull of the pull-down head 10B can be performed smoothly.

[0116] Furthermore, the present invention is not limited to the above-described embodiments, but can be appropriately modified or improved within the scope of implementation.

[0117] As stated above, the following matters are disclosed in this specification.

[0118] [1] A double-ended zipper (1), the double-ended zipper (1) comprising:

[0119] A pair of zipper teeth (30A, 30B) on the left and right sides;

[0120] Multiple chain teeth (32) are arranged in a mutually opposing manner on the inner edges of the first and second zipper chain tapes (30A, 30B) in the left and right directions;

[0121] Insert rod (40) and seat rod (60) are arranged opposite to each other at the lower ends of the inner edges of the first and second zipper teeth (30A, 30B) in the left and right directions; and

[0122] The upper zipper pull (10A) and the lower zipper pull (10B) are configured with their rear openings (18a, 18b) facing each other in order to open and close the first and second zipper teeth (30A, 30B), characterized in that...

[0123] The seat rod (60) has a seat rod protrusion (65) that protrudes toward the insert rod (40).

[0124] The pull-down head (10B) has a locking claw (25) that can protrude into the chain tooth guide path (17b) and abut against the chain tooth (32).

[0125] With the pull-down head (10B) pulled down to the lower end, the locking claw (25) protruding into the chain tooth guide path (17b) is located below the seat bar protrusion (65) and overlaps with the seat bar protrusion (65) when viewed from the top and bottom.

[0126] According to this structure, when the pull-down head (10B) of the second zipper tooth chain (30B) is pulled down to the lower end, the locking claw (25) protruding into the chain tooth guide path (17b) and the seat bar protrusion (65) are in a position of abutting in the vertical direction. Therefore, even when the pull-down head (10B) moves upward from the lowest position, the locking claw (25) and the seat bar protrusion (65) will abut and restrict the movement of the pull-down head (10B).

[0127] Therefore, even in the single-tooth chain state where the first and second zipper teeth (30A, 30B) are separated, the movement of the pull-down head (10B) can be restricted and the pull-down head (10B) can be kept in an appropriate position, such as at the lower end of the second zipper tooth chain (30B).

[0128] [2] According to the double-ended zipper (1) described in [1], wherein,

[0129] When the pull-down head (10B) is pulled down to the lower end, the seat bar protrusion (65) is located below the upper end of the pull-down head (10B).

[0130] If the base protrusion (65) is located above the pull-down head (10B), the movement of the pull-down head (10B) will be greater, which is not preferable. However, according to the above structure, in this embodiment, the base protrusion (65) is located below the upper end of the pull-down head (10B), so the movement of the pull-down head (10B) can be limited less by the base protrusion (65).

[0131] [3] According to the double-ended zipper (1) described in [1] or [2], wherein,

[0132] The seat rod protrusion (65) has a lower inclined surface (65c) that forms a surface lower than the top (65a) of the seat rod protrusion (65).

[0133] When the user pulls the pull-down head (10B) upwards, the guide post (15b) of the pull-down head (10B) interferes with the seat bar protrusion (65), and the upward pull of the pull-down head (10B) may become unsmooth. However, according to the above structure, the lower surface of the seat bar protrusion (65) that is opposite to the guide post (15b) in the vertical direction is set as a lower inclined surface (65c). Therefore, the guide post (15b) is guided by the lower inclined surface (65c) and passes over the seat bar protrusion (65), so the pull-down head (10B) can be pulled upwards smoothly.

[0134] [4] The double-ended zipper (1) according to any one of [1] to [3], wherein,

[0135] The dimension of the back side of the seat protrusion (65) decreases as it moves toward the side of the insert (40).

[0136] According to this structure, when the insert (40) is inserted, the insert (40) is not easy to collide with the seat protrusion (65), so the insert (40) has good insertability.

[0137] [5] The double-ended zipper (1) according to any one of [1] to [4], wherein,

[0138] The dimension of the lower part (48) of the insert (40) in the front-back direction decreases as it moves toward the side of the base (60).

[0139] According to this structure, when the insert (40) is inserted, the insert (40) is not easy to collide with the seat protrusion (65), so the insert (40) has good insertability.

[0140] [6] The double-ended zipper (1) according to any one of [1] to [5], wherein,

[0141] By cutting off the back side of the seat rod protrusion (65) to provide a clearance portion (66), the front and back dimensions of the seat rod protrusion (65) decrease as it moves toward the insertion rod (40).

[0142] By cutting off the front side of the lower part (48) of the insert (40) to provide a clearance portion (46), the front and back dimensions of the lower part (48) of the insert (40) decrease as it moves toward the side of the base (60).

[0143] According to this structure, when the insert (40) is inserted, the insert (40) is not easy to collide with the seat protrusion (65), so the insert (40) has good insertability.

[0144] In addition, since a clearance portion (46) is provided on the lower side of the insert (40), interference with the locking claw (25) protruding from the wing plate (13b) into the chain tooth guide path (17b) can be prevented when the insert (40) is inserted.

[0145] [7] According to the double-ended zipper (1) described in [6], wherein,

[0146] The back of the seat protrusion (65) includes an inclined surface (68) that slopes toward the surface as it moves toward the insert (40).

[0147] The surface of the lower part (48) of the insert (40) includes an inclined surface (47) that slopes toward the back as it goes toward the seat bar (60).

[0148] According to this structure, the inclined surface (68) on the back of the seat protrusion (65) and the inclined surface (47) on the surface of the lower part (48) of the insert (40) can abut and guide each other, so that the insert (40) can be smoothly inserted.

[0149] [8] The double-ended zipper (1) according to any one of [1] to [7], wherein,

[0150] The insert (40) has an insert protrusion (45) that protrudes toward the seat (60).

[0151] When the upper pull head (10A) and the lower pull head (10B) are pulled down to their lower ends, and the insertion rod (40) is inserted into the lower ends of the upper pull head (10A) and the lower pull head (10B), the insertion rod protrusion (45) is located below the seat rod protrusion (65).

[0152] A receiving part (49) is provided on the part of the insert (40) that is above the insert protrusion (45) to receive the seat protrusion (65).

[0153] When the insert (40) is inserted, the first state, in which the insert protrusion (45) and the seat protrusion (65) are in contact when the insert protrusion (45) is about to pass over the seat protrusion (65), transitions to a second state in which the contact state is released or reduced when the insert protrusion (45) passes over the seat protrusion (65) and the seat protrusion (65) is housed in the housing (49).

[0154] According to this structure, the user can feel the resistance and sound when the insertion protrusion (45) passes over the seat protrusion (65), and can properly recognize that the insertion protrusion (40) has been inserted into the seat (60).

[0155] Furthermore, this application is based on the contents of the international patent application (PCT / JP2023 / 044733) filed on December 13, 2023, which are incorporated herein by reference.

[0156] Explanation of reference numerals in the attached figures

[0157] 1. Double-ended zipper; 10A. Top pull tab; 10B. Bottom pull tab; 11a, 11b. Pull tab body; 12a, 12b. Pull tab; 13a, 13b. Outer flap; 14a, 14b. Back flap; 15a, 15b. Guide post; 16a, 16b. Pull tab retainer; 17a, 17b. Chain tooth guide path; 18a, 18b. Rear opening; 19a, 19b. Shoulder opening; 20b. Outer flap flange; 20d. Straight flange; 20f. Sloping flange; 21a, 21b. Back flap flange; 21 c, 21d, Straight flange portion; 21e, 21f, Inclined flange portion; 22, Upper mounting post; 23, Lower mounting post; 24, Cover; 25, Locking claw; 25a, Top end portion; 26, Claw insertion hole; 30A, First zipper tooth chain strap; 30B, Second zipper tooth chain strap; 31a, 31b, Zipper strap; 32, Zipper tooth; 32a, Engaging recess; 33, Upper stop; 40, Insert bar; 40A, Surface; 40B, Back side; 40C, Left and right inner sides; 40D, Left and right outer sides; 40E, Upper side; 40F, Lower side; 41. 42. Recessed portion; 42a. Inner side in the left and right direction; 43. Engaging protrusion; 44. Lower end inclined surface; 45a. Top; 45b. Upper inclined surface; 45c. Lower inclined surface; 46. Clearance portion; 47. Surface inclined surface (inclined surface); 48. Lower part; 49. Reception portion; 60. Seat bar; 60A. Surface; 60B. Back side; 60C. Left and right inner side; 60D. Left and right outer side; 60E. Upper side; 60F. Lower side; 61. Recessed portion; 61a. Upper surface; 61b. Inclined surface; 62a, 62b. Stop Moving part; 65, seat rod protrusion; 65a, top; 65b, upper inclined surface; 65c, lower inclined surface; 66, back side clearance part (clearance part); 67, front side clearance part; 68, back side inclined surface (inclined surface); 69, front side inclined surface; L1, the bisecting line that divides the insert rod into two equal parts in the vertical direction; L2, the bisecting line that divides the seat rod into two equal parts in the vertical direction; L3, a straight line extending in the left and right direction through the upper end of the straight flange of the pull head; L4, a straight line extending in the left and right direction through the lower end of the straight flange of the pull head; M, center in the left and right direction.

Claims

1. A double-ended zipper (1), the double-ended zipper (1) comprising: A pair of zipper teeth (30A, 30B) on the left and right sides; Multiple chain teeth (32) are arranged in a mutually opposing manner on the inner edges of the first and second zipper chain tapes (30A, 30B) in the left and right directions; Insert rod (40) and seat rod (60) are arranged opposite to each other at the lower ends of the inner edges of the first and second zipper teeth (30A, 30B) in the left and right directions; and The upper zipper pull (10A) and the lower zipper pull (10B) are configured with their rear openings (18a, 18b) facing each other in order to open and close the first and second zipper teeth (30A, 30B), characterized in that... The seat rod (60) has a seat rod protrusion (65) that protrudes toward the insert rod (40). The pull-down head (10B) has a locking claw (25) that can protrude into the chain tooth guide path (17b) and abut against the chain tooth (32). With the pull-down head (10B) pulled down to the lower end, the locking claw (25) protruding into the chain tooth guide path (17b) is located below the seat bar protrusion (65) and overlaps with the seat bar protrusion (65) when viewed from the top and bottom.

2. The double-ended zipper (1) according to claim 1, wherein, When the pull-down head (10B) is pulled down to the lower end, the seat bar protrusion (65) is located below the upper end of the pull-down head (10B).

3. The double-ended zipper (1) according to claim 1 or 2, wherein, The seat rod protrusion (65) has a lower inclined surface (65c) that forms a surface lower than the top (65a) of the seat rod protrusion (65).

4. The double-ended zipper (1) according to any one of claims 1 to 3, wherein, The dimension of the back side of the seat protrusion (65) decreases as it moves toward the side of the insert (40).

5. The double-ended zipper (1) according to any one of claims 1 to 4, wherein, The dimension of the lower part (48) of the insert (40) in the front-back direction decreases as it moves toward the side of the base (60).

6. The double-ended zipper (1) according to any one of claims 1 to 5, wherein, By cutting off the back side of the seat rod protrusion (65) to provide a clearance portion (66), the front and back dimensions of the seat rod protrusion (65) decrease as it moves toward the insertion rod (40). By cutting off the front side of the lower part (48) of the insert (40) to provide a clearance portion (46), the front and back dimensions of the lower part (48) of the insert (40) decrease as it moves toward the side of the base (60).

7. The double-ended zipper (1) according to claim 6, wherein, The back of the seat protrusion (65) includes an inclined surface (68) that slopes toward the surface as it moves toward the insert (40). The surface of the lower part (48) of the insert (40) includes an inclined surface (47) that slopes toward the back as it goes toward the seat bar (60).

8. The double-ended zipper (1) according to any one of claims 1 to 7, wherein, The insert (40) has an insert protrusion (45) that protrudes toward the seat (60). When the upper pull head (10A) and the lower pull head (10B) are pulled down to their lower ends, and the insertion rod (40) is inserted into the lower ends of the upper pull head (10A) and the lower pull head (10B), the insertion rod protrusion (45) is located below the seat rod protrusion (65). A receiving part (49) is provided on the part of the insert (40) that is above the insert protrusion (45) to receive the seat protrusion (65). When the insert (40) is inserted, the first state, in which the insert protrusion (45) and the seat protrusion (65) are in contact when the insert protrusion (45) is about to pass over the seat protrusion (65), transitions to a second state in which the contact state is released or reduced when the insert protrusion (45) passes over the seat protrusion (65) and the seat protrusion (65) is housed in the housing (49).

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