Two-way toggle zipper pull and zipper

Abstract

A two-way switching meshing zipper head and zipper, the zipper head includes a base arranged to extend along the axial direction, and also includes two changing members, namely a left changing member and a right changing member, which are swingably installed on a second plate body. The left changing member is in the shape of a strip and a left swing shaft is arranged at the central position of the left changing member. The left changing member is swingably connected to the second plate body through the left swing shaft and constitutes the left boundary of the chain tooth channel. The two ends of the left changing member extend to the two end positions of the base respectively, and there is a left chain belt gap between the left changing member and the first plate body to allow the left chain belt to pass through; the right changing member is in the shape of a strip and a right swing shaft is arranged at the central position of the right changing member. The right changing member is swingably connected to the second plate body through the right swing shaft and constitutes the right boundary of the chain tooth channel. The two ends of the right changing member extend to the two end positions of the base respectively, and there is a right chain belt gap between the right changing member and the first plate body to allow the right chain belt to pass through; the two changing members can swing relative to each other to manage the width of the chain tooth channel at the two end positions of the base.

Description

Technical Field

[0001] The present invention relates to the technical field related to zippers, and in particular to a two-way switching meshing zipper head and a zipper using the zipper head. Background Art

[0002] Zippers are commonly used accessories on fabrics. Zippers generally move the puller to engage or separate the chain teeth on a pair of chain belts. However, the puller on a traditional zipper can generally only pull a pair of chain belts together when pulled in one direction, and separate a pair of engaged chain belts when pulled in the opposite direction. This traditional zipper has a relatively simple function. The Chinese utility model patent with the patent number CN203168188U and the invention name "fabric products that can be easily and quickly removed" applied by the applicant in the early stage discloses a quick-release zipper, which includes a pair of chain belts and a puller. By setting a stripping area at the middle position of a pair of chain belts, the pair of chain belts can be opened directly from the stripping area without using the puller. Although the use of the zipper head can make a pair of separated chain belts mesh together, it is necessary to fully open the pair of chain belts of the quick-release zipper and then re-pull them together in one direction from the beginning to the end each time, which will bring certain inconvenience to the user. It is very necessary to invent a new puller to improve the convenience of use of the quick-release zipper. Summary of the invention

[0003] In order to allow the chain teeth of the quick-release zipper to be quickly re-engaged together through the zipper head after separation, the present invention proposes a two-way switching meshing zipper head, the zipper head comprising a base arranged along an axial extension, the base comprising a first plate body, a second plate body located above the first plate body, and a central column connecting the first plate body and the second plate body, a chain tooth channel through which the chain teeth can pass is arranged between the first plate body and the second plate body, the central column divides the central area of ​​the chain tooth channel into a left chain tooth channel and a right chain tooth channel through which the left and right chain teeth of the zipper can pass; it is characterized in that it also includes two changing members swingably mounted on the second plate body, namely a left changing member and a right changing member, the left changing member is in the shape of a strip and a left swing shaft is arranged at the central position of the left changing member, the left changing member is swingably arranged on the second plate body through the left swing shaft and constitutes a left boundary of the chain tooth channel, the two ends of the left changing member extend to the two end positions of the base respectively, and there is a left chain belt gap between the left changing member and the first plate body through which the left chain belt can pass;

[0004] The right change member is strip-shaped and a right swing shaft is arranged at the center of the right change member. The right change member is swingably arranged on the second plate body through the right swing shaft and forms the right boundary of the chain tooth channel. The two ends of the right change member extend to the two end positions of the base respectively. There is a right chain belt gap between the right change member and the first plate body for allowing the right chain belt to pass through.

[0005] The two changing members can swing relative to each other in response to the movement of the zipper head so as to manage the width of the chain tooth channel at the two end positions of the base; wherein the chain tooth output end and the chain tooth input end are determined based on the current movement direction of the zipper head, and the swing of the two changing members can define the chain tooth channel at the chain tooth output end as an eight-shaped groove which gradually narrows along the movement direction of the chain teeth, so that a pair of non-engaged and side-by-side chain teeth can gradually gather together to engage, and at the same time, the swing of the two changing members can change the chain tooth channel at the chain tooth input end into a channel that allows a pair of non-engaged and side-by-side chain teeth to pass side by side into the zipper head.

[0006] Among them, the left changing member and the right changing member are components used to define the boundaries of the left and right sides of the chain tooth channel. Since the left changing member and the right changing member are both able to swing, the shape of the defined chain tooth channel also changes according to the swinging position of the left changing member and the right changing member. For example, when the left changing member and the right changing member swing relative to each other to form an eight-shaped shape, the chain tooth channel is an eight-shaped groove.

[0007] Among them, there is a left link gap between the left changing member and the first plate body for allowing the left link to pass through, and there is a right link gap between the right changing member and the first plate body for allowing the right link to pass through. The left changing member and the right changing member arranged in this way can prevent the chain teeth from escaping from the chain tooth channel, and also leave space for a pair of chain belts to pass through.

[0008] Among them, the chain tooth output end and the chain tooth input end determined based on the current moving direction of the zipper head mean that the chain tooth output end and the chain tooth input end are changeable, and they are determined according to the relative moving direction of the zipper head and the chain teeth; that is, when the moving direction of the zipper head is switched, the chain tooth channel at the original chain tooth entry end will become the chain tooth channel at the chain tooth output end, and the chain tooth channel at the original chain tooth output end will become the chain tooth channel at the chain tooth entry end.

[0009] According to the above technical scheme, compared with the prior art, the beneficial technical effects of the present invention are: first, the left changing member and the right changing member swingably mounted on the second plate body are provided with structures extending to the two ends of the chain tooth channel, so that the left and right widths of the chain tooth channel can be adjusted by swinging the left changing member and the right changing member, which greatly simplifies the management structure of the width of the chain tooth channel; second, the two changing members can swing relative to each other in response to the movement of the zipper head so as to manage the width of the chain tooth channel at both ends of the base, which enables the changing members to swing accordingly according to the moving direction of the zipper head, so that the wider section of the figure-eight groove is located at the chain tooth input end and the narrower section is located at the chain tooth output end, which allows the zipper head to move in both forward and reverse directions, allowing a pair of chain teeth that are not engaged and arranged side by side left and right to easily enter the zipper head and gradually close and engage.

[0010] A further technical solution may be that the left change member is L-shaped and includes a horizontal left connecting plate and a vertical left side plate, the left swing shaft is connected to the horizontal left connecting plate, the left side plate constitutes the left boundary of the chain tooth channel, and the left chain belt gap is arranged between the left side plate and the first plate body; the right change member is L-shaped and includes a horizontal right connecting plate and a vertical right side plate, the right swing shaft is connected to the horizontal right connecting plate, the right side plate constitutes the right boundary of the chain tooth channel, and the right chain belt gap is arranged between the right side plate and the first plate body; the left side plate and the right side plate swing relative to each other to manage the width of the chain tooth channel at both ends of the base. The left change member and the right change member arranged in this way can not only facilitate the swing connection with the second plate body, but the L-shaped structure can also improve the structural strength of the left change member and the right change member, which is conducive to making the width of the chain tooth channel more stable.

[0011] A further technical solution may be that the left and right sides of the second plate body are in a sandwich structure so as to have a left clamping groove and a right clamping groove, the horizontal left connecting plate is inserted into the left clamping groove, the left swing shaft is connected to the upper and lower walls of the left clamping groove, the horizontal right connecting plate is inserted into the right clamping groove, and the right swing shaft is connected to the upper and lower walls of the right clamping groove. Wherein, the left and right sides of the second plate body are in a sandwich structure, which means that the second plate body includes at least two layers of spaced-apart walls; the left clamping groove and the right clamping groove refer to the groove-shaped space defined between the two layers of walls; in this way, the change member is installed in the left clamping groove and the right clamping groove, and the horizontal connecting plate of the change member is limited by the two layers of walls, which can reduce the shaking of the change member and help to make the width of the chain tooth channel defined by the change member more stable.

[0012] A further technical solution may also include an actuator movably arranged on the second plate body, the actuator being able to move correspondingly on the second plate body in response to the driving force driving the zipper head to move forward and backward, and the actuator being used to drive the two changing members to swing when it moves so as to manage the width of the chain tooth channel at both ends of the base. In this way, the driving force of pulling the zipper head not only drives the actuator to move, but also drives the two changing members through the actuator to adjust the width of the chain tooth channel, which is conducive to simplifying the difficulty of operating the zipper head.

[0013] A further technical solution may be that the horizontal left connecting plate of the left changing member is also provided with two left positioning posts extending upward, the two left positioning posts are arranged on both sides of the left swing shaft, two left recesses adapted to the two left positioning posts are arranged on the left side of the second plate body, and the two left positioning posts cooperate with the two left recesses to limit the maximum swing amplitude of the left changing member; the horizontal right connecting plate of the right changing member is also provided with two right positioning posts extending upward, the two right positioning posts are arranged on both sides of the right swing shaft, two right recesses adapted to the two right positioning posts are arranged on the right side of the second plate body, and the two right positioning posts cooperate with the two right recesses to limit the maximum swing amplitude of the right changing member. In this way, through the cooperation of the recess and the positioning post structure, it is beneficial to control the width of the chain tooth channel at the chain tooth output end by controlling the swing angle of the left changing member and the right changing member so that a pair of unengaged chain teeth can be engaged together.

[0014] A further technical solution may be that the actuator is provided with a left wing and a right wing extending to both sides, the left wing is between the two left positioning posts, and when the actuator moves, the left wing can touch the left positioning post and thus push the left change member to swing; the right wing is between the two right positioning posts, and when the actuator moves, the right wing can touch the right positioning post and thus push the right change member to swing. In this way, the actuator can control the left change member and the right change member to swing towards each other through the left wing and the right wing when moving forward or backward, which is conducive to ensuring that the chain tooth channel forms an eight-shaped groove.

[0015] Since the zipper head has the above advantages, it can be applied to zipper products, and the zipper head is slidably arranged on a pair of the chain teeth; all the chain teeth on the inner side of a pair of the chain belts include a quick-release chain tooth area, and the meshing force of the chain teeth in the quick-release chain tooth area is suitable for being opened without the help of the zipper head, and the zipper head is used to mesh the already opened chain teeth on any of its two sides. Such a zipper can not only quickly open the meshed chain teeth on a pair of the chain belts through the quick-release chain tooth area, but also mesh the unmeshed chain teeth on a pair of opened chain belts through a zipper head, which greatly improves the convenience of using the zipper.

[0016] A further technical solution may be that the two ends of the zipper are respectively provided with an upper stop and a lower stop, the upper stop connects the left ends of a pair of the chain belts together, and the lower stop connects the right ends of a pair of the chain belts together, the width of the upper stop and the lower stop is not greater than the width of the chain tooth channel at the chain tooth output end, and when the zipper head moves to the leftmost end or the rightmost end, at least part of the upper stop or the lower stop can enter the chain tooth channel of the zipper head. In this way, when the zipper head moves to the left or right to the left end or the right end of the zipper, the zipper head can be stopped by the upper stop or the lower stop; if the zipper head is reversely moved under the reverse force at this time, regardless of whether the pair of the chain belts are opened or not, the width of the upper stop and the lower stop is unchanged, and at this time the change member at the chain tooth output end can be easily moved to both sides of the upper stop or the lower stop to achieve narrowing the width of the chain tooth channel at the chain tooth output end, and the zipper head can mesh the chain teeth on a pair of chain belts together when it moves in the reverse direction.

[0017] Since the present invention has the above characteristics and advantages, it can be applied to a zipper with a two-way switching meshing zipper head. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the front view structure of a zipper using the zipper head;

[0019] Figure 2 1. It is a schematic diagram of the axial side structure of a two-way switching meshing zipper head;

[0020] Figure 3 It is a schematic diagram of the exploded structure of a two-way switching meshing zipper head;

[0021] Figure 4 1. It is a schematic diagram of the structure of a two-way switching meshing zipper head in the front view direction;

[0022] Figure 5 yes Figure 4 Schematic diagram of the cross-section structure in the AA direction;

[0023] Figure 6 yes Figure 4 Schematic diagram of the end face structure in the middle BB direction;

[0024] Figure 7 is a schematic diagram of the structure of the zipper in a front view, showing the state when the zipper head is located at the leftmost end;

[0025] Figure 8 yes Figure 7 Schematic diagram of the cross-sectional structure in the DD direction. DETAILED DESCRIPTION

[0026] The bidirectional switching meshing zipper head using the technical solution of the present invention and the zipper using the zipper head are further described below in conjunction with the accompanying drawings.

[0027] like Figure 1 As shown, the bidirectional meshing zipper includes a pair of chain belts 1 arranged left and right, and chain teeth 2 are respectively arranged along the axial direction on the inner side of the pair of chain belts 1. All the chain teeth 2 on the inner side of the pair of chain belts 1 include a quick-release chain tooth area 21 and a non-quick-release area 22, the quick-release chain tooth area 21 is located in the middle area of ​​the chain belt 1, and the non-quick-release area 22 is distributed on both sides of the quick-release chain tooth area 21. The meshing force of the chain teeth in the quick-release chain tooth area 21 is less than the meshing force of the chain teeth in the non-quick-release area 22, and the chain teeth 2 in the quick-release chain tooth area 21 can be torn open by the user without the aid of the zipper head, so that the chain teeth 2 that have been opened along the quick-release chain tooth area 21 can be opened along with all the meshing chain teeth 2, which is very convenient to use.

[0028] In order to allow the opened chain teeth 2 to mesh together again, Figure 1 to Figure 6 As shown, a zipper head 3 is also provided on a pair of the chain belts 1, and a pull tab 9 is provided on the zipper head 3. By pulling the pull tab 9, the zipper head 3 can slide in the forward direction or reverse direction on the chain element 2 along the axial direction. The zipper head 3 is used to receive the opened chain element 2 at any one of its two ends and mesh it so as to connect the pair of the chain belts 1 together. The zipper head 3 includes a base 4 extending along the axial direction, and a chain element channel 40 for allowing the chain element 2 to pass is constructed based on the base 4. The base 4 or the chain element channel 40 includes two ends, one is a chain element input end, which is the front end part of the chain element channel 40, and the chain element 2 enters the zipper head 3 through the chain element input end, and the other is a chain element output end, which is the rear end part of the chain element channel 40, and the chain element 2 leaves the zipper head 3 through the chain element output end. In the solution of the present invention, the chain element output end and the chain element input end need to be determined according to the relative moving direction of the zipper head 3 and the chain element 2, that is, Figure 1When the zipper head 3 moves in the positive left direction (i.e., direction K in the figure), the right end of the zipper head 3 is the chain tooth output end, and the left end of the zipper head 3 is the chain tooth output end; conversely, if the zipper head 3 moves in the positive left direction (i.e., direction K in the figure), the right end of the zipper head 3 is the chain tooth output end, and the left end of the zipper head 3 is the chain tooth output end. Figure 1 When the zipper head 3 moves to the right in the opposite direction of the moving direction, the left end of the zipper head 3 changes to the chain element output end, and the right end of the zipper head 3 changes to the chain element output end.

[0029] like Figure 2~Figure 6 As shown, the base 4 includes a first plate 41, a second plate 42 located above the first plate 41, and a central column 43 connecting the first plate 41 and the second plate 42. A tooth channel 40 is formed between the first plate 41 and the second plate 42 so that the tooth 2 can pass through. Figure 5 As shown in the figure, the central column 43 is located in the central area of ​​the tooth channel 40 like an isolated island, dividing the central area of ​​the tooth channel 40 into a left tooth channel 40a and a right tooth channel 40b for allowing the left and right teeth 2 of the zipper to pass through. Since the forward movement and reverse movement of the zipper head 3 are only opposite in direction but have the same action principle, for the sake of convenience, in this embodiment, the zipper head 3 is taken as moving in the forward direction (such as Figure 1 The following is an example of movement in the K direction (indicated in the figure).

[0030] like Figure 2As shown, the zipper head 3 also includes two long strip-shaped changing members (5a, 5b) swingably mounted on the second plate body 42 of the base 4, wherein the left changing member 5a is arranged on the left side in the moving direction, and the right changing member 5b is arranged on the right side in the moving direction. The left changing member 5a and the right changing member 5b can manage the width of the chain tooth channel 40 at both end positions correspondingly in response to the moving direction of the zipper head 3, which is conducive to enabling the zipper head 3 to mesh a pair of unmeshed chain teeth 2 together regardless of whether it moves in the forward direction or the reverse direction, thereby greatly improving the convenience of use of the zipper head 3. A left swing shaft 53a is arranged at the center of the left change member 5a. The left change member 5a is swingably arranged on the second plate body 42 through the left swing shaft 53a and constitutes the left boundary of the tooth channel. The two ends of the left change member 5a extend to the tooth input end and the tooth output end of the base respectively. A right swing shaft 53b is arranged at the center of the right change member 5b. The two ends of the right change member 5b extend to the tooth input end and the tooth output end of the base respectively. The structures of the left change member 5a and the right change member 5b, which are arranged symmetrically on the left and right sides, are basically the same. The left change member 5a is L-shaped and includes a horizontal left connecting plate 51a and a vertical left plate 52a. A left swing shaft hole 510a is arranged on the horizontal left connecting plate 51a. The left swing shaft 53a is connected to the horizontal left connecting plate 51a through the left swing shaft hole 510a. The vertical left plate 52a constitutes the left boundary of the tooth channel 40. Similarly, the right change member 5b is also L-shaped and includes a horizontal right connecting plate 51b and a vertical right side plate 52b. The horizontal right connecting plate 51b is provided with a right swing shaft hole 510b. The right swing shaft 53b is connected to the horizontal right connecting plate 51b through the right swing shaft hole 510b. The vertical right side plate 52b constitutes the right boundary of the chain tooth channel 40. Further, a second left mounting hole 426a and a second right mounting hole 426b are provided on the left and right sides of the second plate body 42. The left change member 5a and the right change member 5b are movably connected to the second left mounting hole 426a and the second right mounting hole 426b of the second plate body 42 through the left swing shaft 53a and the right swing shaft 53b. The left change member 5a and the right change member 5b swing accordingly in response to the moving direction of the zipper head 3 to manage the width of the chain tooth channel 40 at both ends of the base 4.

[0031] In order to allow the left changing member 5a and the right changing member 5b to swing in response to the zipper head 3, the zipper head 3 also includes an actuator 6 movably arranged on the second plate body 42, and the actuator 6 can move in the positive and negative directions on the second plate body 42 accordingly in response to the driving force that drives the zipper head 3 to move forward and reversely, and the actuator 6 includes a sliding block 61 and a connecting block 62 connected to the sliding block 61, and the sliding block 61 is provided with a long groove 610, and the second plate body 42 is provided with a slide rail 45 that matches the long groove 610, and the sliding block 61 is slidably arranged on the slide rail 45 through the long groove 610; further, a front limit block 451a and a rear limit block 451b are also provided at both ends of the slide rail 45, and the front limit block 451a and the rear limit block 451b can well prevent the actuator 6 from escaping from the slide rail 45.

[0032] A further technical solution may be that the actuating member 6 is used to drive the left changing member 5a and the right changing member 5b to swing when it moves, so as to manage the width of the chain tooth channel 40 at both ends of the base 4. Among them, two left positioning columns extending upward are also provided on the horizontal left connecting plate 51a of the left changing member 5a, namely, a first left positioning column 54a and a second left positioning column 55a, and the first left positioning column 54a and the second left positioning column 55a are respectively arranged at the front and rear sides of the left swing shaft 53a; similarly, two right positioning columns extending upward are also provided on the horizontal right connecting plate 51b of the right changing member 5b, namely, a first right positioning column 54b and a second right positioning column 55b, and the first right positioning column 54b and the second right positioning column 55b are respectively arranged at the front and rear sides of the right swing shaft 53b. A left wing 63a and a right wing 63b extending to both sides are provided on the actuator 6, and the left wing 63a and the right wing 63b are connected to the left and right sides of the sliding block 61. The left wing 63a is arranged between the first left positioning column 54a and the second left positioning column 55a, and the right wing 63b is arranged between the first right positioning column 54b and the second right positioning column 55b. When the actuator 6 moves, the left wing 63a can touch the first left positioning column 54a or the second left positioning column 55a to push the left changing member 5a to swing, and the right wing 63b can touch the first right positioning column 54b or the second right positioning column 55b to push the right changing member 5b to swing.

[0033] In order to allow a pair of chain teeth 2 to mesh with each other, it is necessary to change the width of the chain tooth channel 40 at the chain tooth output end to a width that just allows a pair of meshing chain teeth 2 to pass through. In order to control the swing angles of the left changing member 5a and the right changing member 5b, two left pits adapted to the first left positioning column 54a and the second left positioning column 55a are provided on the left side of the second plate body 42, which are the first left pit 421a and the second left pit 422a respectively. Two right pits adapted to the first right positioning column 54b and the second right positioning column 55b are provided on the right side of the second plate body 42, which are the first right pit 421b and the second right pit 422b respectively. When the wall body of the left changing member 5a and the right changing member 5b located on the side of the chain tooth output end swings toward the middle direction of the chain tooth channel 40, the second left positioning column 55a and the second right positioning column 55b can swing into the second left pit 422a and the second right pit 422b and combine to limit the maximum swing amplitude of the left changing member 5a and the right changing member 5b; when the left changing member 5b and the right changing member 5b swing in the opposite direction, the wall body located on the side of the chain tooth input end will swing toward the direction of the chain tooth channel 40, and the first left positioning column 54a and the first right positioning column 54b can swing into the first left pit 421a and the first right pit 421b and combine to limit the maximum swing amplitude of the left changing member 5a and the right changing member 5b when swinging in the opposite direction. In this way, by using the first left pit 421a, the first right pit 421b, the second left pit 422a and the second right pit 422b to limit the swing angles of the left changing member 5a and the right changing member 5b, the width of the chain tooth channel 40 at the chain tooth output end can be adjusted to allow a pair of non-engaged and side-by-side arranged chain teeth 2 to engage and slide out of the zipper head.

[0034] A further technical solution may also be: Figure 3 and Figure 6 As shown, there is a left chain gap 401a between the left side plate 52a and the first plate body 41, and there is a right chain gap 401b between the right side plate 52b and the first plate body 41. By setting the left chain gap 401a and the right chain gap 401b, the webbing on a pair of chain belts 1 can pass through, so that the zipper head 3 can move in the forward and reverse directions on the pair of chain belts 1.

[0035] A further technical solution may be that the left and right sides of the second plate body 42 are in a sandwich structure, such as Figure 2 and Figure 6As shown, the second plate body 42 includes a first wall body 423 and a second wall body 424 arranged at the top and bottom, and the first wall body 423 and the second wall body 424 are arranged separately to form a left clamping groove and a right clamping groove on the left and right sides of the second plate body 42, the horizontal left connecting plate 51a is inserted into the left clamping groove, and the horizontal right connecting plate 51b is inserted into the right clamping groove, and the second left mounting hole 426a and the second right mounting hole 426b of the second plate body 42 pass through the first wall body 423 and the second wall body 424, so that the horizontal left connecting plate 51a of the left changing member 5a is swingably connected to the first wall body 423 and the second wall body 424 of the left clamping groove through the left swing shaft 53a, and the horizontal right connecting plate 51b of the right changing member 5b is swingably connected to the first wall body 423 and the second wall body 424 of the right clamping groove through the right swing shaft 53b. This is beneficial to improving the connection strength between the left changing member 5a, the right changing member 5b and the second plate body 42, and the width of the chain tooth channel 40 defined by the left changing member 5a, the right changing member 5b is more stable.

[0036] A further technical solution may also be that a left installation auxiliary hole 411a is provided on the left side wall of the first plate body 41, and a right installation auxiliary hole 411b is provided on the right side wall of the first plate body 41, and the left installation auxiliary hole 411a and the right installation auxiliary hole 411b correspond to the second left installation hole 426a and the second right installation hole 426b respectively, so that the installation fixture can extend into the bottom of the second plate body 42 through the second left installation hole 426a and the second right installation hole 426b to provide auxiliary support for the installation of the left swing shaft 53a and the right swing shaft 53b, which is beneficial to improving the installation efficiency of the zipper head 3.

[0037] A further technical solution may be that the two ends of the zipper are respectively provided with an upper stop 91 and a lower stop 92, the upper stop 91 connects the left ends of a pair of the chain belts 1 together, and the lower stop 92 connects the right ends of a pair of the chain belts 1 together, and the width of the upper stop 91 and the lower stop 92 is not greater than the width of the chain tooth channel 40 at the chain tooth output end. Since the upper stop 91 and the lower stop 92 are fixed components and are not separated with the separation of the pair of the chain belts 1, when the zipper head 3 moves to the leftmost end or the rightmost end, at least part of the upper stop 91 or the lower stop 92 can enter the chain tooth channel 40 of the zipper head. This is conducive to the left change member 5a or the right change member 5b being able to easily move to both sides of the upper stop 91 or the lower stop 92 when the zipper head 3 moves in the reverse direction, thereby achieving the narrowing of the width of the chain tooth channel 40 at the chain tooth output end.

[0038] The zipper head 3 is moved in the forward direction (such as Figure 1Taking the movement in the direction K indicated in the figure as an example, the pull tab 9 pulls the actuator 6 under the action of an external driving force, and the actuator 6 can not only slide in the positive direction on the slide rail 45 relative to the base 4 due to the force, but also can move the entire zipper head 3 on the chain tooth 2 in the positive direction. The left wing edge 63a on the actuating member 6 can touch the first left positioning post 54a on the left changing member 5a during the forward movement, thereby pushing the wall of the left changing member 5a at the input end of the chain tooth to swing outward, and the wall of the left changing member 5a at the output end of the chain tooth will correspondingly swing toward the middle and partially extend into the chain tooth channel 40; and the right wing edge 63b can touch the first right positioning post 54b on the right changing member 5b during the forward movement, thereby pushing the wall of the right changing member 5b at the input end of the chain tooth to swing outward, and the wall of the right changing member 5b at the output end of the chain tooth will correspondingly swing toward the middle and partially extend into the chain tooth channel 40. Figure 2 As shown, when the second left positioning column 55a of the left change member 5a swings into the second left concave 422a and combines, the second right positioning column 55b of the right change member 5b swings into the second right concave 422b and combines, the left change member 5a and the right change member 5b stop swinging; at this time, the left change member 5a and the right change member 5b define the tooth channel 40 at the tooth output end as an eight-shaped groove that gradually narrows from wide to narrow along the tooth moving direction. In this state, the actuator 6 can further drive the base 4 to move in the positive direction on the tooth 2, and a pair of unengaged teeth 2 can enter the zipper head 3 through the tooth channel 40 at the tooth input end and move along the eight-shaped groove toward the tooth output end. Since the width of the tooth channel 40 at the tooth output end is narrowed, a pair of unengaged teeth 2 arranged side by side can gradually gather and mesh together before leaving the tooth output end. When the zipper head 3 moves to the leftmost position of the chain belt 1 or the chain element 2 in the forward direction, the upper stop 91 enters the chain element channel 40 and stops the zipper head 3, and the zipper head 3 engages and arranges all the chain elements 2 located in front of it, whether they are already opened or not. If there are opened chain elements 2 located behind it (i.e., in the opposite direction to the forward direction), the zipper head 3 is moved in the reverse direction to the terminal position at the right end of the chain element 2. The engagement method of the chain element 2 during the reverse movement is the same as the forward engagement method, except that the chain element input end and the chain element output end of the zipper head 3 are swapped due to the change in the moving direction of the zipper head 3.

Claims

1. A two-way switching meshing zipper head, the zipper head comprising a base extending in an axial direction, the base comprising a first plate body, a second plate body located above the first plate body, and a central column connecting the first plate body and the second plate body, a chain tooth channel through which chain teeth can pass is arranged between the first plate body and the second plate body, the central column divides the central area of ​​the chain tooth channel into a left chain tooth channel and a right chain tooth channel through which left and right chain teeth of the zipper can pass; characterized in that: It also includes two changing members swingably mounted on the second plate body, namely a left changing member and a right changing member, the left changing member is in a strip shape and a left swing shaft is arranged at the central position of the left changing member, the left changing member is swingably connected to the second plate body through the left swing shaft and forms the left boundary of the chain tooth channel, the two ends of the left changing member extend to the two end positions of the base respectively, and there is a left chain belt gap between the left changing member and the first plate body for allowing the left chain belt to pass through; The right change member is strip-shaped and a right swing shaft is arranged at the center of the right change member. The right change member is swingably connected to the second plate body through the right swing shaft and forms the right boundary of the chain tooth channel. The two ends of the right change member extend to the two end positions of the base respectively. There is a right chain belt gap between the right change member and the first plate body for allowing the right chain belt to pass through. The two changing members can swing relative to each other in response to the movement of the zipper head so as to manage the width of the chain tooth channel at the two end positions of the base; wherein based on the chain tooth output end and the chain tooth input end determined by the current movement direction of the zipper head, the swing of the two changing members can define the chain tooth channel at the chain tooth output end as an eight-shaped groove that gradually narrows along the chain tooth movement direction, so that a pair of non-engaged and side-by-side chain teeth can be gradually gathered together to engage, and at the same time, the swing of the two changing members can change the chain tooth channel at the chain tooth input end into a channel that allows a pair of non-engaged and side-by-side chain teeth to pass side by side into the zipper head; The left change member is L-shaped and includes a horizontal left connecting plate and a vertical left plate, the left swing shaft is connected to the horizontal left connecting plate, the vertical left plate constitutes the left boundary of the chain tooth channel, and the left chain belt gap is arranged between the vertical left plate and the first plate body; the right change member is L-shaped and includes a horizontal right connecting plate and a vertical right plate, the right swing shaft is connected to the horizontal right connecting plate, the vertical right plate constitutes the right boundary of the chain tooth channel, and the right chain belt gap is arranged between the vertical right plate and the first plate body; the vertical left plate and the vertical right plate swing relative to each other to manage the width of the chain tooth channel at both ends of the base; The zipper head is also provided with an actuator movably disposed on the second plate body, and the actuator can move on the second plate body in response to the driving force driving the zipper head to move forward and reversely, and the actuator is used to drive the two changing members to swing when the actuator moves, so as to manage the width of the chain element channel at both ends of the base; The left changing member is also provided with two left positioning posts extending upward, the two left positioning posts are axially arranged on both sides of the left swing shaft, and two left pits adapted to the two left positioning posts are arranged on the left side of the second plate body, and the two left positioning posts cooperate with the two left pits to limit the maximum swing amplitude of the left changing member; the right changing member is also provided with two right positioning posts extending upward, the two right positioning posts are axially arranged on both sides of the right swing shaft, and two right pits adapted to the two right positioning posts are arranged on the right side of the second plate body, and the two right positioning posts cooperate with the two right pits to limit the maximum swing amplitude of the right changing member; The actuator is provided with a left wing and a right wing extending to both sides, the left wing is located between the two left positioning posts, and when the actuator moves, the left wing can touch the left positioning post and thus push the left changing member to swing; the right wing is located between the two right positioning posts, and when the actuator moves, the right wing can touch the right positioning post and thus push the right changing member to swing.

2. The two-way switching meshing zipper head according to claim 1, characterized in that: The left and right sides of the second plate body are in a sandwich structure, thus having a left clamping groove and a right clamping groove, the horizontal left connecting plate is inserted into the left clamping groove, the left swing shaft is connected to the upper and lower walls of the left clamping groove, the horizontal right connecting plate is inserted into the right clamping groove, and the right swing shaft is connected to the upper and lower walls of the right clamping groove.

3. A zipper comprising a pair of chain belts, wherein chain teeth are respectively arranged on the inner sides of the pair of chain belts; characterized in that: A zipper head according to claim 1 or 2 is slidably arranged on a pair of the chain teeth; all the chain teeth on the inner side of a pair of the chain belts include a quick-release chain tooth area, and the engagement force of the chain teeth in the quick-release chain tooth area is suitable for being opened without the aid of the zipper head, and the zipper head is used to engage the already opened chain teeth on any one of its two sides.

4. The zipper according to claim 3, characterized in that: An upper stop and a lower stop are respectively provided at both ends of the zipper, the upper stop connects the left ends of a pair of the chain belts together, and the lower stop connects the right ends of a pair of the chain belts together, the width of the upper stop and the lower stop is not greater than the width of the chain tooth channel at the chain tooth output end, and when the zipper head moves to the leftmost end or the rightmost end, at least part of the upper stop or the lower stop can enter the chain tooth channel of the zipper head.

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