CN214103491U - Bidirectional switching meshing type zipper head and zipper - Google Patents

Abstract

The zipper head comprises a base which extends along the axial direction, and further comprises a left changing piece and a right changing piece which are arranged on the second plate body in a swinging mode, wherein the left changing piece is strip-shaped, a left swing shaft is arranged in the center of the left changing piece, the left changing piece is connected to the second plate body through the left swing shaft in a swinging mode and forms a left boundary of a zipper tooth channel, two ends of the left changing piece extend to two end positions of the base respectively, and a left zipper belt gap through which a left zipper belt can pass is formed between the left changing piece and the first plate body; the right changing piece is strip-shaped, a right swing shaft is arranged in the center of the right changing piece, the right changing piece is connected to the second plate body through the right swing shaft in a swinging mode and forms a right boundary of the chain tooth channel, two ends of the right changing piece extend to two end positions of the base respectively, and a right chain belt gap through which a right chain belt can pass is formed between the right changing piece and the first plate body; the two changing members can swing relative to each other to control the width of the fastener element passage at the positions of both ends of the base.

Description

Bidirectional switching meshing type zipper head and zipper

Technical Field

The invention relates to the technical field of zippers, in particular to a bidirectional switching meshing type zipper puller and a zipper applying the zipper puller.

Background

The zipper is a common accessory on fabric, the zipper generally enables the zipper teeth on a pair of zipper tapes to be meshed or separated through the movement of the zipper head, but the zipper head on the traditional zipper can only realize the purpose that the zipper tape can be closed when the zipper head is pulled in one direction, and the zipper tape which is meshed is separated when the zipper head is pulled in the opposite direction, so that the traditional zipper has a single function. The present applicant has applied for a patent No. CN203168188U in an early stage, entitled "fabric article capable of being quickly and conveniently taken off", which discloses a quick-release zipper, including a pair of zipper tapes and a slider, wherein a pair of zipper tapes can be directly opened from a taking-off region without a slider by providing the taking-off region at a middle position of the pair of zipper tapes, and although the pair of separated zipper tapes can be engaged together by using the slider, the pair of zipper tapes of the quick-release zipper needs to be re-pulled in one direction from the head to the tail each time after being completely opened, which brings inconvenience to a user.

Disclosure of Invention

In order to enable the zipper teeth of the quick-release zipper to be quickly re-engaged together through the zipper head after being separated, the invention provides a bidirectional switching engaged zipper head, which comprises a base which is axially extended and arranged, wherein the base comprises a first plate body, a second plate body positioned above the first plate body and a central cylinder body connected with the first plate body and the second plate body, a zipper tooth channel through which zipper teeth can pass is arranged between the first plate body and the second plate body, and the central cylinder body divides a central area of the zipper tooth channel into a left zipper tooth channel and a right zipper tooth channel through which left and right zipper teeth of the zipper can pass; the chain tooth changing device is characterized by further comprising a left changing piece and a right changing piece which are arranged on the second plate body in a swinging mode, wherein the left changing piece is strip-shaped, a left swing shaft is arranged in the center of the left changing piece, the left changing piece is arranged on the second plate body through the left swing shaft in a swinging mode and forms a chain tooth channel left boundary, two ends of the left changing piece extend to two end positions of the base respectively, and a left chain belt gap through which a left chain belt can pass is formed between the left changing piece and the first plate body;

the right changing piece is strip-shaped, a right swing shaft is arranged in the center of the right changing piece, the right changing piece is arranged on the second plate body through the swing of the right swing shaft and forms the right boundary of the zipper tooth channel, two ends of the right changing piece respectively extend to two end positions of the base, and a right zipper gap through which a right zipper belt can pass is formed between the right changing piece and the first plate body;

two of the changing pieces can relatively swing in response to the movement of the slider to manage the width of the element passage at both end positions of the base; the two changing pieces swing to define the element passage of the element output end as a splayed channel gradually narrowing along the element moving direction based on the element output end and the element input end determined by the current moving direction of the zipper puller, so that a pair of non-meshed elements arranged side by side left and right can be gradually folded to be meshed, and simultaneously the two changing pieces swing to change the element passage of the element input end into a pair of non-meshed elements arranged side by side left and right to pass into the zipper puller.

The left and right changers are members for limiting boundaries of left and right sides of the element channel, and since the left and right changers are both capable of swinging, the shape of the defined element channel is also changed according to the swinging positions of the left and right changers, for example, the element channel is a splayed channel when the left and right changers swing relatively to be splayed.

The left chain belt gap through which the left chain belt can pass is formed between the left changing piece and the first plate body, the right chain belt gap through which the right chain belt can pass is formed between the right changing piece and the first plate body, and therefore the left changing piece and the right changing piece can prevent the chain teeth from being separated from the chain tooth channel and simultaneously provide a space for the chain belts to pass through.

Wherein, the tooth output end and the tooth input end determined based on the current moving direction of the zipper puller mean that the tooth output end and the tooth input end are changeable and are determined according to the relative moving direction of the zipper puller and the tooth; that is, the element passage at the end where the element enters is changed to the element passage at the end where the element exits when the moving direction of the slider is switched, and the element passage at the end where the element exits is changed to the element passage at the end where the element enters.

According to the technical scheme, compared with the prior art, the invention has the beneficial technical effects that: firstly, the left changing piece and the right changing piece which are arranged on the second plate body in a swinging mode are provided with structures extending to two ends of the zipper tooth channel, so that the left width and the right width of the zipper tooth channel can be adjusted only by swinging the left changing piece and the right changing piece, and the management structure of the width of the zipper tooth channel is greatly simplified; second, the two changing pieces can swing relatively in response to the movement of the slider to manage the width of the element channel at the two ends of the base, which enables the changing pieces to swing correspondingly according to the moving direction of the slider, so that the wider section of the splayed channel is located at the element output end, and the wider section of the splayed channel is located at the element input end and the narrower section of the splayed channel is located at the element output end, which enables the slider to move in the positive and negative directions, so that a pair of non-engaged elements arranged side by side left and right can easily enter the slider and gradually get close and engage.

The left changing piece is L-shaped and comprises 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 forms the left boundary of the chain tooth channel, and the left chain belt is arranged between the left side plate and the first plate body in a clearance mode; the right changing piece is L-shaped and comprises 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 forms the right boundary of the zipper tooth channel, and the right zipper belt is arranged between the right side plate and the first plate body in a clearance mode; the left side plate and the right side plate swing relatively to manage the width of the fastener element channel at the two end positions of the base. The left side change piece that sets up like this with the right side change piece not only can be convenient for with the second plate body forms the swing and is connected, and the structure of L type can also improve the structural strength of a left side change piece and right change piece is favorable to letting the width of chain tooth passageway is more stable moreover.

Further technical scheme can also be, thereby the left and right both sides limit of second plate body is sandwich structure and has left double-layered groove and right double-layered groove, horizontal left connecting plate insert in the left double-layered groove, left pendulum shaft is connected to on the upper and lower wall body in left double-layered groove, horizontal right connecting plate insert in the right double-layered groove, right pendulum shaft is connected to on the upper and lower wall body in right double-layered groove. The left side and the right side of the second plate body are of a sandwich structure, which means that the second plate body at least comprises two layers of wall bodies arranged at intervals; the left clamping groove and the right clamping groove are groove-shaped spaces defined between two wall bodies; therefore, the changing piece is arranged in the left clamping groove and the right clamping groove, the horizontal connecting plate of the changing piece is limited by the two layers of wall bodies, the shaking of the changing piece can be reduced, and the width of a chain tooth channel defined by the changing piece is more stable.

The zipper puller further comprises an actuating piece movably arranged on the second plate body, the actuating piece can correspondingly move on the second plate body in response to a driving force for driving the zipper puller to move forwards and backwards, and the actuating piece is used for driving the two changing pieces to swing when the actuating piece moves so as to manage the width of the zipper tooth channel at the two end positions of the base. In this way, the driving force for pulling the zipper puller not only drives the actuating piece to move, but also drives the two changing pieces through the actuating piece to realize the adjustment of the width of the zipper tooth channel, thereby being beneficial to simplifying the operation difficulty of the zipper puller.

According to a further technical scheme, two left positioning columns extending upwards are further arranged on a horizontal left connecting plate of the left changing piece and are respectively arranged on two sides of the left swing shaft, two left pits adaptive to the two left positioning columns are arranged on the left side of the second plate body, and the two left positioning columns and the two left pits are matched to limit the maximum swing amplitude of the left changing piece; two right positioning columns extending upwards are further arranged on the horizontal right connecting plate of the right changing piece and are respectively arranged on two sides of the right swing shaft, two right pits adaptive to the two right positioning columns are arranged on the right side of the second plate body, and the two right positioning columns and the two right pits are matched to limit the maximum swing amplitude of the right changing piece. Therefore, through the matching of the concave pit and the positioning column structure, the swing angle of the left changing piece and the right changing piece is controlled to control the width of the zipper tooth channel at the output end of the zipper tooth, so that a pair of zipper teeth which are not meshed can be meshed together.

The actuating piece is provided with a left wing edge and a right wing edge which extend towards two sides, the left wing edge is arranged between the two left positioning columns, and the left wing edge can touch the left positioning columns when the actuating piece moves so as to push the left changing piece to swing; the right wing edge is arranged between the two right positioning columns, and when the actuating piece moves, the right wing edge can touch the right positioning columns to push the right changing piece to swing. Therefore, the actuating element can control the left changing piece and the right changing piece to swing in opposite directions when moving forwards or backwards through the left wing edge and the right wing edge, and the zipper tooth channel is favorably ensured to form a splayed channel.

Since the slider has the above advantages, it can be applied to a slide fastener product in which the slider is slidably disposed on a pair of the coupling elements; all the elements inside the pair of fastener tapes include a quick-release element region having an engagement force suitable for enabling the elements to be opened without the aid of the slider for engaging the opened elements on either side thereof. The zipper not only can realize the quick opening of the zipper teeth meshed with the zipper belts through the quick-release zipper tooth area, but also can realize the meshing of the zipper teeth which are not meshed with the zipper belts through the zipper head, thereby greatly improving the use convenience of the zipper.

The zipper is characterized in that an upper stop and a lower stop are respectively arranged at two ends of the zipper, the left ends of a pair of zipper belts of the upper stop are connected together, the right ends of a pair of zipper belts of the lower stop are connected together, the width of the upper stop and the width of the lower stop are not larger than that of a zipper tooth channel at the output end of a zipper tooth, 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 zipper tooth channel of the zipper head. Therefore, when the zipper puller moves leftwards or rightwards to the left end or the right end of the zipper, the zipper puller can stop moving through the upper stop or the lower stop; if the zipper head is reversely moved under the reverse acting force, no matter whether the pair of chain belts are opened or not, the widths of the upper stop and the lower stop are not changed, at the moment, the changing piece at the output end of the zipper teeth can be easily moved to the two sides of the upper stop or the lower stop, so that the width of the zipper teeth channel at the output end of the zipper teeth is narrowed, and the zipper teeth on the pair of chain belts can be meshed together when the zipper head is reversely moved.

Since the present invention has the above-described features and advantages, it can be applied to a slide fastener having a two-way switching engagement type slider.

Drawings

FIG. 1 is a front view schematically showing a structure of a slide fastener to which the slider is applied;

FIG. 2 is a schematic view showing a structure of a side direction of a shaft of a two-way switching engagement type slide fastener;

fig. 3 is a schematic view of an exploded structure of a two-way switching engagement type slider;

fig. 4 is a schematic structural view of a front view direction of a bidirectional switching meshing type zipper head;

FIG. 5 is a schematic sectional view taken along the line A-A in FIG. 4;

FIG. 6 is a schematic view of the end face structure in the direction B-B in FIG. 4;

FIG. 7 is a front view schematically showing the structure of the slide fastener, showing the state where the slider is positioned at the leftmost end;

fig. 8 is a schematic cross-sectional view taken along the direction D-D in fig. 7.

Detailed Description

The following describes a two-way switching engagement type slider and a slide fastener using the slider according to the present invention with reference to the accompanying drawings.

As shown in fig. 1, the double-engagement slide fastener includes a pair of fastener tapes 1 arranged in the left-right direction, and fastener elements 2 are provided on the inner sides of the pair of fastener tapes 1 in the axial direction. The pair of the chain belts 1 are characterized in that all the chain elements 2 on the inner sides of the chain belts 1 comprise quick-release chain element areas 21 and non-quick-release areas 22, the quick-release chain element areas 21 are located in the middle areas of the chain belts 1, the non-quick-release areas 22 are distributed on two sides of the quick-release chain element areas 21, the chain element meshing force of the quick-release chain element areas 21 is smaller than that of the non-quick-release areas 22, and the chain elements 2 of the quick-release chain element areas 21 can be torn by a user without the aid of zipper heads so that all the meshed chain elements 2 can be opened along the chain elements 2 opened in the quick-release chain element areas 21.

In order to re-engage the opened fastener elements 2, as shown in fig. 1 to 6, a slider 3 is further provided on the pair of fastener tapes 1, a pull tab 9 is provided on the slider 3, the slider 3 is slidable in the forward direction or the reverse direction in the axial direction on the fastener elements 2 by pulling the pull tab 9, and the slider 3 is configured to receive and engage the opened fastener elements 2 at either one of both ends thereof to connect the pair of fastener tapes 1 together. The slider 3 includes a base 4 extending in an axial direction, a fastener element passage 40 for passing the fastener element 2 is formed on the basis of the base 4, and the base 4 or the fastener element passage 40 includes two end portions, one of which is an element input end which is a front end portion of the fastener element passage 40 through which the fastener element 2 enters the slider 3, and the other of which is an element output end which is a rear end portion of the fastener element passage 40 through which the fastener element 2 exits the slider 3. In the solution of the present invention, the fastener element output end and the fastener element input end need to be determined according to the relative moving direction of the slider 3 and the fastener element 2, that is, when the slider 3 moves in the left forward direction (i.e., K direction in the drawing) shown in fig. 1, the right end of the slider 3 is the fastener element output end, and the left end of the slider 3 is the fastener element output end; on the contrary, if the slider 3 is moved in the right direction opposite to the moving direction shown in fig. 1, the left end of the slider 3 is changed to the element output end, and the right end of the slider 3 is changed to the element output end.

As shown in fig. 2 to 6, 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 fastener element passage 40 through which the fastener elements 2 can pass is formed between the first plate 41 and the second plate 42, the center post 43 is positioned like an island in a center area of the fastener element passage 40 as shown in fig. 5 in a plan view, the center area of the fastener element passage 40 is divided into a left fastener element passage 40a and a right fastener element passage 40b through which the left and right fastener elements 2 of the slide fastener can pass, since the forward and reverse movements of the slider 3 are only in opposite directions and the operation principle is the same, for convenience of explanation, in the present embodiment, the slider 3 is described as being moved in the forward direction (the K direction indicated in fig. 1).

As shown in fig. 2, the slider 3 further includes two elongated changing members (5 a, 5 b) which are pivotally mounted on the second plate 42 of the base 4, wherein the left changing member 5a is disposed on the left side in the moving direction, and the right changing member 5b is disposed on the right side in the moving direction, and the left changing member 5a and the right changing member 5b can correspondingly manage the widths of the element passages 40 at both end positions in response to the moving direction of the slider 3, which is advantageous in that the slider 3 can engage a pair of non-engaged elements 2 regardless of the forward direction movement and the reverse direction movement, and the convenience of use of the slider 3 is greatly improved. A left swing shaft 53a is arranged in the center of the left changing piece 5a, the left changing piece 5a is arranged on the second plate body 42 in a swinging mode through the left swing shaft 53a and forms the left boundary of the fastener element channel, and two ends of the left changing piece 5a extend to the fastener element input end and the fastener element output end of the base respectively; the right swing shaft 53b is arranged in the center of the right changing piece 5b, and two ends of the right changing piece 5b extend to the tooth input end and the tooth output end of the base respectively. The left changing piece 5a and the right changing piece 5b which are arranged in a left-right symmetrical mode are basically consistent in structure, the left changing piece 5a is L-shaped and comprises a horizontal left connecting plate 51a and a vertical left side plate 52a, a left swing shaft hole 510a is formed in 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, and the vertical left side plate 52a forms the left boundary of the chain tooth channel 40. Similarly, the right changing piece 5b also has an L-shape and includes a horizontal right connecting plate 51b and a vertical right side plate 52b, a right swing shaft hole 510b is provided on the horizontal right connecting plate 51b, the right swing shaft 53b is connected to the horizontal right connecting plate 51b through the right swing shaft hole 510b, and the right boundary of the chain tooth channel 40 formed by the vertical right side plate 52 b. Further, a second left mounting hole 426a and a second right mounting hole 426b are disposed on the left and right sides of the second plate 42, and the left and right changing pieces 5a and 5b are movably connected to the second left and right mounting holes 426a and 426b of the second plate 42 through the left and right swing shafts 53a and 53 b. The left and right changers 5a and 5b are correspondingly swung in response to the moving direction of the slider 3 to manage the width of the element passage 40 at both end positions of the base 4.

In order to allow the left and right changing members 5a, 5b to swing in response to the zipper slider 3, the zipper slider 3 further comprises an actuator 6 movably disposed on the second plate 42, the actuator 6 is capable of moving in the forward and reverse directions on the second plate 42 in response to a driving force for driving the zipper slider 3 to move in the forward and reverse directions, the actuator 6 comprises a sliding block 61 and a connecting block 62 connected to the sliding block 61, the sliding block 61 is provided with a long groove 610, the second plate 42 is provided with a sliding rail 45 engaged with the long groove 610, and the sliding block 61 is slidably disposed on the sliding rail 45 through the long groove 610; further, a front stopper 451a and a rear stopper 451b are provided at both ends of the slide rail 45, and the actuator 6 can be prevented from coming off the slide rail 45 by the front stopper 451a and the rear stopper 451 b.

Further, the actuating member 6 may be configured to drive the left and right changing members 5a and 5b to swing when the actuating member moves, so as to control the width of the element channel 40 at the two end positions of the base 4. Two left positioning columns extending upwards are further arranged on the horizontal left connecting plate 51a of the left changing piece 5a, and are respectively 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 on the front side and the rear side of the left swing shaft 53 a; similarly, two right positioning pillars extending upwards are also arranged on the horizontal right connecting plate 51b of the right changing piece 5b, which are respectively a first right positioning pillar 54b and a second right positioning pillar 55b, and the first right positioning pillar 54b and the second right positioning pillar 55b are respectively arranged at the front side and the rear side of the right swing shaft 53 b. The actuating element 6 is provided with a left wing 63a and a right wing 63b extending towards two sides, the left wing 63a and the right wing 63b are connected to the left side and the right side of the sliding block 61, the left wing 63a is disposed between the first left positioning column 54a and the second left positioning column 55a, the right wing 63b is disposed between the first right positioning column 54b and the second right positioning column 55b, when the actuating element 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 piece 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 piece 5b to swing.

In order to control the swing angle of the left changing piece 5a and the right changing piece 5b, two left concave pits adapted to the first left positioning column 54a and the second left positioning column 55a, a first left concave pit 421a and a second left concave pit 422a, respectively, are arranged on the left side of the second plate body 42, and two right concave pits adapted to the first right positioning column 54b and the second right positioning column 55b, a first right concave pit 421b and a second right concave pit 422b, respectively, are arranged on the right side of the second plate body 42. When the wall bodies of the left and right changing pieces 5a and 5b on the side of the element output end swing towards the middle direction of the element channel 40, the second left and right positioning posts 55a and 55b can swing into and combine with the second left and right concave pits 422a and 422b to limit the maximum swing amplitude of the left and right changing pieces 5a and 5 b; when the left changing piece 5b and the right changing piece 5b swing in opposite directions, the wall body on the side of the element input end swings towards the element channel 40, and the first left positioning column 54a and the first right positioning column 54b can swing into the first left concave pit 421a and the first right concave pit 421b and combine with each other to define the maximum swing amplitude of the left changing piece 5a and the right changing piece 5b in opposite swing. In this way, by limiting the swing angle of the left and right changers 5a and 5b using the first left recess 421a, the first right recess 421b, the second left recess 422a, and the second right recess 422b, the width of the element passage 40 at the element output end can be adjusted to allow a pair of elements 2 which are not engaged and arranged side by side in the left-right direction to be engaged and slid out of the slider.

Further, as shown in fig. 3 and 6, a left fastener tape gap 401a may be formed between the left side plate 52a and the first plate 41, a right fastener tape gap 401b may be formed between the right side plate 52b and the first plate 41, and the webbing on the pair of fastener tapes 1 may pass through the left fastener tape gap 401a and the right fastener tape gap 401b, so that the slider 3 may move in the forward direction and the reverse direction on the pair of fastener tapes 1.

Further, according to a technical solution, the left and right sides of the second plate 42 may have a sandwich structure, as shown in fig. 2 and 6, the second plate 42 includes a first wall 423 and a second wall 424 that are arranged up and down, the first wall 423 and the second wall 424 are arranged at a distance from each other to form a left clamping groove and a right clamping groove on the left and right sides of the second plate 42, the horizontal left connecting plate 51a is inserted into the left clamping groove, the horizontal right connecting plate 51b is inserted into the right clamping groove, the second left mounting hole 426a and the second right mounting hole 426b of the second plate 42 penetrate through the first wall 423 and the second wall 424, so that the horizontal left connecting plate 51a of the left changing piece 5a is connected to the first wall 423 and the second wall 424 of the left clamping groove by the left swing shaft 53a swing, and the horizontal right connecting plate 51b of the right changing piece 5b is connected to the right clamping groove by the right swing shaft 53b swing The first wall 423 and the second wall 424 of the groove. This is advantageous in that the strength of the connection between the left and right modifiers 5a, 5b and the second plate 42 is increased, and the width of the element passage 40 defined by the left and right modifiers 5a, 5b is more stable.

Further technical solution may also be, be provided with left installation auxiliary hole 411a on the left lateral wall body of first plate body 41, be provided with right installation auxiliary hole 411b on the right lateral wall body of first plate body 41, left installation auxiliary hole 411a, right installation auxiliary hole 411b respectively with second left mounting hole 426a, second right mounting hole 426b are corresponding, and like this, the sectional fixture can pass through second left mounting hole 426a and second right mounting hole 426b stretch into for the installation the below of second plate body 42 left pendulum shaft 53a, right pendulum shaft 53b provide auxiliary stay, and this is favorable to improving the installation effectiveness of zip fastener head 3.

Further, according to a further technical solution, an upper stopper 91 and a lower stopper 92 are respectively provided at both ends of the zipper, the upper stopper 91 connects left ends of a pair of the zipper tapes 1 together, the lower stopper 92 connects right ends of a pair of the zipper tapes 1 together, and widths of the upper stopper 91 and the lower stopper 92 are not larger than a width of the fastener element channel 40 at the output end of the fastener element, and since the upper stopper 91 and the lower stopper 92 are fixed members and are not separated with the separation of the pair of the zipper tapes 1, at least a part of the upper stopper 91 or the lower stopper 92 can enter the fastener element channel 40 of the slider when the slider 3 moves to the leftmost end or the rightmost end. This is advantageous in that the left or right changing piece 5a or 5b can be easily moved to both sides of the upper or lower stopper 91 or 92 when the slider 3 is moved in the reverse direction to narrow the width of the element passage 40 at the element output end.

To explain the example of the slider 3 moving in the forward direction (the K direction as shown in fig. 1), the pull tab 9 moves the actuator 6 by an external driving force, and the actuator 6 is not only slid on the slide rail 45 in the forward direction with respect to the base 4 by a force but also moved in the forward direction with the slider 3 along the element 2. During the forward movement, the left wing 63a of the actuating member 6 can touch the first left positioning pillar 54a of the left changing piece 5a to push the wall body of the left changing piece 5a at the input end of the fastener element to swing outwards, and the wall body of the left changing piece 5a at the output end of the fastener element correspondingly swings towards the middle and partially extends into the fastener element channel 40; the right wing 63b can touch the first right positioning pillar 54b on the right changing piece 5b during the forward movement to push the wall body of the right changing piece 5b at the input end of the fastener element to swing outwards, and the wall body of the right changing piece 5b at the output end of the fastener element correspondingly swings towards the middle and partially extends into the fastener element channel 40. As shown in fig. 2, when the second left positioning post 55a of the left changing piece 5a swings into the second left recess 422a and is combined, and the second right positioning post 55b of the right changing piece 5b swings into the second right recess 422b and is combined, the left changing piece 5a and the right changing piece 5b stop swinging; at this time, the left and right changing pieces 5a and 5b define the element passage 40 of the element output end as a splayed channel gradually narrowing in width in the element moving direction. In this state, the actuating member 6 can further drive the base 4 together to move in the forward direction on the element 2, and the pair of non-engaged elements 2 can enter the slider 3 through the element passage 40 at the element input end and move along the splayed channel in the element output end direction, and the pair of non-engaged elements 2 arranged side by side in the left-right direction can be gradually gathered and engaged together and then separated from the element output end due to the narrowing width of the element passage 40 at the element output end. When the slider 3 moves in the forward direction to the leftmost position of the fastener stringer 1 or the fastener elements 2, the upper stop 91 enters the fastener element channel 40 and stops the slider 3, and the slider 3 completely engages and finishes the opened fastener elements 2 or the non-opened fastener elements 2 directly in front of the slider. If the element 2 to be opened is thereafter located at the rear thereof (i.e., in the reverse direction opposite to the forward direction), the slider 3 is moved in the reverse direction to the end position of the right end of the element 2, and the element 2 is engaged in the reverse direction in the same manner as the forward engagement method described above, except that the element input end and the element output end of the slider 3 are exchanged by the change of the moving direction of the slider 3.

Claims (8)

1. The two-way switching meshing type zipper puller comprises a base which is arranged in an extending mode along the axial direction, the base comprises a first plate body, a second plate body located above the first plate body and a central cylinder body connected with the first plate body and the second plate body, a zipper tooth channel capable of allowing zipper teeth to pass through is arranged between the first plate body and the second plate body, and the central cylinder body divides the central area of the zipper tooth channel into a left zipper tooth channel and a right zipper tooth channel capable of allowing left zipper teeth and right zipper teeth of a zipper to pass through; the chain tooth changing device is characterized by further comprising a left changing piece and a right changing piece which are arranged on the second plate body in a swinging mode, wherein the left changing piece is strip-shaped, a left swing shaft is arranged in the center of the left changing piece, the left changing piece is connected to the second plate body through the left swing shaft in a swinging mode and forms the left boundary of a chain tooth channel, two ends of the left changing piece extend to two end positions of the base respectively, and a left chain belt gap through which a left chain belt can pass is formed between the left changing piece and the first plate body;

the right changing piece is strip-shaped, a right swing shaft is arranged in the center of the right changing piece, the right changing piece is connected to the second plate body through the right swing shaft in a swinging mode and forms a right boundary of the chain tooth channel, two ends of the right changing piece respectively extend to two end positions of the base, and a right chain belt gap through which a right chain belt can pass is formed between the right changing piece and the first plate body;

two of the changing pieces can relatively swing in response to the movement of the slider to manage the width of the element passage at both end positions of the base; the two changing pieces swing to define the element passage of the element output end as a splayed channel gradually narrowing along the element moving direction based on the element output end and the element input end determined by the current moving direction of the zipper puller, so that a pair of non-meshed elements arranged side by side left and right can be gradually folded to be meshed, and simultaneously the two changing pieces swing to change the element passage of the element input end into a pair of non-meshed elements arranged side by side left and right to pass into the zipper puller.

2. The double-direction-switching-meshing-type zipper head according to claim 1, wherein the left changing piece is L-shaped and comprises a horizontal left connecting plate and a vertical left side plate, the left swing shaft is connected to the horizontal left connecting plate, the vertical left side plate forms a left boundary of the fastener element channel, and the left chain belt is arranged between the vertical left side plate and the first plate body in a clearance manner; the right changing piece is L-shaped and comprises a horizontal right connecting plate and a vertical right side plate, the right swing shaft is connected to the horizontal right connecting plate, the vertical right side plate forms the right boundary of the zipper tooth channel, and the right zipper belt is arranged between the vertical right side plate and the first plate body in a clearance mode; the vertical left side plate and the vertical right side plate swing relatively to manage the width of the chain tooth channels at the two ends of the base.

3. The double-switchable jogged zipper slider according to claim 2, wherein left and right side edges of the second plate are of a sandwich structure to have a left clamping groove into which the horizontal left connecting plate is inserted, and a right clamping groove to which the left swing shaft is connected to upper and lower walls of the left clamping groove, and the horizontal right connecting plate is inserted into the right clamping groove, and the right swing shaft is connected to upper and lower walls of the right clamping groove.

4. The double-direction-switching-engagement type fastener stringer according to claim 1, 2 or 3, further comprising an actuator movably provided on said second body, said actuator being capable of moving correspondingly on said second body in response to a driving force for driving said fastener stringer to move forward and backward, said actuator being adapted to drive both of said changing members to swing so as to manage a width of said element channel at both end positions of said base when said actuator moves.

5. The meshing type bidirectional switching zipper puller according to claim 4, wherein the left changing piece is further provided with two left positioning columns extending upwards, the two left positioning columns are respectively arranged on two sides of the left swing shaft along the axial direction, two left concave pits matched with the two left positioning columns are arranged on the left side of the second plate body, and the two left positioning columns and the two left concave pits are matched to limit the maximum swing amplitude of the left changing piece; the right changing piece is further provided with two right positioning columns extending upwards, the two right positioning columns are respectively arranged on two sides of the right swing shaft along the axial direction, two right pits adaptive to the two right positioning columns are arranged on the right side of the second plate body, and the two right positioning columns and the two right pits are matched to limit the maximum swing amplitude of the right changing piece.

6. The meshing type two-way switching zipper puller according to claim 5, wherein the actuating member is provided with a left wing edge and a right wing edge extending towards two sides, the left wing edge is arranged between the two left positioning columns, and when the actuating member moves, the left wing edge can touch the left positioning columns to push the left changing member to swing; the right wing edge is arranged between the two right positioning columns, and when the actuating piece moves, the right wing edge can touch the right positioning columns to push the right changing piece to swing.

7. A zipper including a pair of fastener tapes, inside of which fastener elements are respectively provided; a slide fastener slider according to any one of claims 1 to 6 slidably provided on the pair of fastener elements; all the elements inside the pair of fastener tapes include a quick-release element region having an engagement force suitable for enabling the elements to be opened without the aid of the slider for engaging the opened elements on either side thereof.

8. The slide fastener according to claim 7, wherein the slide fastener is provided at both ends thereof with an upper stopper and a lower stopper, respectively, the upper stopper connects left ends of a pair of the fastener tapes together, the lower stopper connects right ends of a pair of the fastener tapes together, a width of the upper stopper and the lower stopper is not greater than a width of the element passage at the output end of the element, and at least a part of the upper stopper or the lower stopper can enter the element passage of the slider when the slider moves to the leftmost end or the rightmost end.

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