CN220001007U - Non-binding pull head and double-opening zipper - Google Patents

Abstract

The utility model discloses an unbound slider and a double-opening zipper, wherein the slider comprises a slider main body, the slider main body is provided with an upper wing plate and a lower wing plate which are relatively parallel, and a guide column arranged at the front end side of the slider main body, the guide column is used for connecting the upper wing plate and the lower wing plate, the front end of the inner side of the upper wing plate is provided with an upper concave groove, the upper concave groove is arranged in an extending way from the front end side to the rear end side of the upper wing plate, the upper concave groove is communicated with the front end port of a chute, and the upper concave groove comprises at least two sections of upper concave areas with different extension lengths; and/or the front end of the inner side surface of the lower wing plate is provided with a lower concave groove, the lower concave groove is extended from the front end side to the rear end side of the lower wing plate, the lower concave groove is communicated with the front end port of the chute, and the lower concave groove comprises at least two sections of lower concave areas with different extension lengths. The upper concave groove/the lower concave groove can better guide the chain element row to finish the actions of separating and combining the chains at the front end of the pull head main body, so that the unbound pull head of the utility model slides more smoothly, and the occurrence of a clamping condition is prevented.

Description

Non-binding pull head and double-opening zipper

Technical Field

The utility model belongs to the technical field of zippers, and particularly relates to an unbound slider and a double-opening zipper.

Background

In order to prevent the automatic movement of the slider, the existing slider is provided with a locking structure on the slider body, for example, a lock hook extending into a sliding groove of the slider body is connected to a nose of the slider body, and the nose is pulled by the pull piece to separate the lock hook from the fastener element, so that the slider is moved, and the zipper fastener is combined and separated.

In the double-opening zipper, two opposite sliders are arranged on one zipper tooth chain, the rear end sides of the two sliders are oppositely arranged, when the two sliders are vertically arranged, if the sliders with lock hooks are adopted for the sliders positioned below, when the lower half parts of the zipper tooth chain are required to be split, the sliders of the lower Fang Latou are required to be pulled to be unlocked, and then the sliders can be moved.

The existing lock-free pull head is provided with a pull tab structure, the sliding groove formed by the upper wing plate and the lower wing plate of the pull head main body is of a smooth structure, the upward movement and the automatic downward movement of the pull head are affected under the action of external force, the clamping condition can occur, and the upward and downward movement of the pull head can not be completed smoothly under the condition of not using the pull tab.

Disclosure of Invention

One of the objectives of the present utility model is to provide an unconstrained slider, which solves the above technical problems by providing an upper concave groove and a lower concave groove on the inner side surfaces of an upper wing plate and a lower wing plate respectively, wherein when the zipper strips on both sides of the slider are acted by external force, the upper concave groove/the lower concave groove have a height difference from the inner side surfaces of the upper wing plate/the lower wing plate respectively, and the upper concave groove/the lower concave groove can better guide the zipper teeth to finish the actions of separating and combining the zipper at the front end of the slider main body, so that the unconstrained slider of the present utility model slides more smoothly, and the occurrence of a clamping condition is prevented.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the unbound pull head comprises a pull head main body, wherein the pull head main body is provided with an upper wing plate, a lower wing plate and a guide column, the upper wing plate and the lower wing plate are relatively parallel, the guide column is arranged at the front end side of the pull head main body and is used for connecting the upper wing plate and the lower wing plate, the left side and the right side of the upper wing plate are provided with upper guide plates in an extending way towards the lower wing plate, the left side and the right side of the lower wing plate are provided with lower guide plates in an extending way towards the lower wing plate, and the upper wing plate, the lower wing plate, the upper guide plates and the lower guide plates enclose a chute for a chain tooth to slide through;

an upper concave groove is formed in the front end of the inner side surface of the upper wing plate, the upper concave groove extends from the front end side to the rear end side of the upper wing plate, the upper concave groove is communicated with the front end port of the sliding groove, and the upper concave groove comprises at least two sections of upper concave areas with different extension lengths;

and/or the front end of the inner side surface of the lower wing plate is provided with a lower concave groove, the lower concave groove extends from the front end side to the rear end side of the lower wing plate, the lower concave groove is communicated with the front end port of the chute, and the lower concave groove comprises at least two sections of lower concave areas with different extension lengths.

The zipper is arranged in such a way, the zipper head can be a non-locking and non-binding zipper head on the basis of not having a pull tab and a lock hook, and the zipper head can slide up and down under the condition that the pull tab is not pulled, so that the zipper is opened and closed, when the zipper belt is subjected to left and right pulling force, the zipper head can move upwards to open the zipper, after the external force disappears, the zipper head automatically slides downwards under the drive of self weight, so that the closure of the zipper belt is completed, or an instant force is applied to the zipper head, the zipper head can automatically slide downwards, and compared with the existing non-locking zipper head, the zipper head can slide more smoothly and close the zipper teeth belt better; and go up the front end department of pterygoid lamina and lower pterygoid lamina and all have sunken groove, this sunken groove can be better guide pull head main part accomplish the guide to the tooth row under the no lock condition, when the zip fastener area of pull head both sides receives the external force effect, because upward sunken groove/lower sunken groove respectively with go up pterygoid lamina/lower pterygoid lamina's medial surface have the difference in height, upward sunken groove/lower sunken groove can be better guide the tooth row and accomplish the action of dividing the chain and closing the chain in the front end department of pull head main part, make the gliding more smooth and easy of the no constraint pull head of this scheme, prevent the condition of card dun.

Preferably, at least a part of the upper concave groove extends to the side wall of the guide post and/or at least a part of the lower concave groove extends to the side wall of the guide post in the width direction of the slider body.

By such arrangement, the upper concave groove and the lower concave groove can have guiding areas with enough space in the width direction and the length direction, and the influence on the strength of the slider caused by the overlarge areas of the upper concave groove and the lower concave groove can be prevented.

Preferably, the upper concave groove comprises a first upper concave area close to the upper guide plate and a second upper concave area close to the guide post, the length of the first upper concave area extending along the length direction of the pull head main body is longer than that of the second upper concave area extending along the length direction of the pull head main body, and the first upper concave area is communicated with the second upper concave area;

the lower concave groove comprises a first lower concave area close to the lower guide plate and a second lower concave area close to the guide column, the length of the first lower concave area extending along the length direction of the pull head main body is greater than that of the second lower concave area extending along the length direction of the pull head main body, and the first lower concave area is communicated with the second lower concave area.

By the arrangement, the inner side surfaces of the upper wing plate and the lower wing plate of the slider main body are provided with the two sections of concave areas with different extension lengths, the contact area between the slider main body and the inner side of the fastener element can be reduced by the second upper concave area/lower concave area close to the guide post, friction can be reduced when the slider is opened and the fastener element row is closed, and the fastener element row is smoother when the slider is closed/opened; the extension length of the first upper concave area/the first lower concave area is respectively larger than that of the second upper concave area/the second lower concave area, so that the contact area between the area, close to the outer side, of the element row and the main body of the slider can be obviously reduced, the sliding smoothness of the slider is further improved, and the extension length of the second upper concave area/the second lower concave area is small, so that the strength of the upper wing plate/the lower wing plate on the two sides of the guide column can be ensured.

Preferably, the second upper concave region extends to an outer side wall of the guide post in the width direction, and the second lower concave region extends to an outer side wall of the guide post in the width direction.

By the arrangement, the second upper concave area and the second lower concave area can better guide the teeth contacted with the two sides of the guide post in the sliding process of the slider

Preferably, the upper wing plate is provided with upper concave grooves in the areas on two sides of the guide column, and the lower wing plate is provided with lower concave grooves in the areas on two sides of the guide column.

By the arrangement, the upper wing plate and the lower wing plate can be guided to slide up, down, left and right sides of the tooth row at two sides of the guide post.

Preferably, the first upper concave region and the first lower concave region are respectively provided with a first inclined wall extending along the length direction of the upper wing plate and a side wall extending along the width direction of the slider body, and the second upper concave region and the second lower concave region are respectively provided with a second inclined wall extending along the width direction of the slider body;

two ends of a first inclined wall of the first upper concave region are respectively connected with one end of a side wall of the first upper concave region and one end of a second inclined wall of the second upper concave region, and the other end of the side wall of the first upper concave region is connected with one side of the upper guide plate;

the two ends of the first inclined wall of the first lower concave region are respectively connected with one end of the side wall of the first lower concave region and one end of the second inclined wall of the second lower concave region, and the other end of the side wall of the first lower concave region is connected with one side of the lower guide plate.

By the arrangement, the first upper concave area and the second upper concave area are connected into a whole, the first lower concave area and the second lower concave area are connected into a whole, and simultaneously, the first inclined side wall and the second inclined side wall can apply guiding forces in two directions to the bottom of the fastener element.

Preferably, an upper inclined surface inclined upward is provided at the rear end side of the inner side surface of the upper wing plate, and a lower inclined surface inclined downward is provided at the rear end side of the inner side surface of the lower wing plate, so that a first accommodation area with a height greater than that of the chute is formed between the upper inclined surface and the lower inclined surface.

Preferably, two sides of the rear end side of the upper guide plate are provided with upper protruding parts which vertically extend away from the upper wing plate, and upper clamping grooves are formed in the upper protruding parts;

lower protruding parts which vertically extend towards the direction deviating from the lower wing plate are arranged on two sides of the rear end side of the lower guide plate, and lower clamping grooves are formed in the lower protruding parts;

so that a second accommodating area is formed between the upper protruding part and the lower protruding part, and the height of the second accommodating area is larger than that of the sliding groove.

Preferably, along the height direction of the slider main body, the top wall of the upper clamping groove is higher than the height of the inner side surface of the upper wing plate, so that the plane of the top wall of the upper clamping groove is positioned above the plane of the inner side surface of the upper wing plate;

along the height direction of the pull head main body, the bottom wall of the lower clamping groove is lower than the height of the inner side surface of the lower wing plate, so that the plane of the bottom wall of the lower clamping groove is positioned below the plane of the inner side surface of the lower wing plate.

The arrangement ensures that the second receiving area has a greater longitudinal cross-sectional dimension than the longitudinal cross-sectional dimension of the slide groove, so that, in the use environment of the double-open slide fastener, a further slider can be inserted into the second receiving space of the unbound slider.

Another object of the present utility model is to provide a double-open slide fastener comprising a fastener stringer, and a first slider and a second slider attached to the fastener stringer, wherein the second slider is the unbound slider described in any one of the above.

The setting like this can make the second pull head be in the extreme position of zip fastener chain belt when normal state, and first pull head can be the pull head of taking locking structure, and the accessible pull tab slides to arbitrary fixed position, and when the user squats or when pulling the zip fastener chain belt of second pull head both sides through external force, the second pull head can slide upwards automatically until contact grafting with first pull head is in the same place, and the lower half of zip fastener chain belt is opened this moment, when the user stands up or when external force disappears, thereby the second pull head slides down under the effect of dead weight and makes the zip fastener chain belt accomplish the chain that closes automatically. The clothes using the unbound pull head can automatically slide upwards to open the zipper tooth chain belt below when a user squats down, so that the lower hem of the clothes can be opened at a larger angle, the unbound pull head can be widely applied to the sports clothes, the phenomenon that the user frequently pulls the pull piece to open the lower end part of the zipper tooth chain belt is avoided, and the convenience of the user is prompted.

The beneficial effects are that:

the non-binding zipper head provided by the utility model has the advantages that the locking structure and the zipper pull are eliminated, the zipper head can be made into a non-locking and non-binding zipper head on the basis of not having the zipper pull and the locking hook, and the zipper head can slide up and down under the condition of not pulling the zipper pull, so that the zipper is opened and closed, when the zipper belt is subjected to left and right pulling force, the zipper head can move upwards to open the zipper, after the external force disappears, the zipper head automatically slides downwards under the drive of dead weight, so that the closure of the zipper belt is completed, or an instant force is applied to the zipper head, the zipper head can automatically slide downwards, and compared with the existing non-locking zipper head, the zipper head can slide more smoothly and the zipper tooth belt is closed better; and go up the front end department of pterygoid lamina and lower pterygoid lamina and all have sunken groove, this sunken groove can be better guide pull head main part accomplish the guide to the tooth row under the no lock condition, when the zip fastener area of pull head both sides receives the external force effect, because upward sunken groove/lower sunken groove respectively with go up pterygoid lamina/lower pterygoid lamina's medial surface have the difference in height, upward sunken groove/lower sunken groove can be better guide the tooth row and accomplish the action of dividing the chain and closing the chain in the front end department of pull head main part, make the gliding more smooth and easy of the no constraint pull head of this scheme, prevent the condition of card dun.

Drawings

FIG. 1 is a schematic view of a primary view of an unbound slider according to the present utility model;

FIG. 2 is a diagram showing the construction of the utility model in the upward view of an unbound slider;

FIG. 3 is an enlarged view of a portion of the structure of FIG. 1;

FIG. 4 is a diagram showing the rear view of an unbound slider according to the present utility model;

FIG. 5 is a schematic diagram showing the assembly of a slider of a double-open slide fastener according to embodiment 3 of the present utility model;

reference numerals

1. An upper wing plate; 11. an upper concave groove; 111. a first upper recessed region; 112. a second upper recessed region; 2. a lower wing plate; 21. a lower concave groove; 211. a first lower recessed region; 212. a second undercut region; 22. a first sloped wall; 23. a second sloped wall; 24. a sidewall; 25. a lower inclined surface; 3. a guide post; 4. an upper guide plate; 41. an upper protruding portion; 411. an upper clamping groove; 5. a lower guide plate; 51. a lower protruding portion; 511. a lower clamping groove; 6. a first accommodation region; 7. a second accommodation region; 101. a first slider; 102. and a second slider.

Detailed Description

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will explain the specific embodiments of the present utility model with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the utility model, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.

The technical scheme of the utility model is described in detail in the following by specific embodiments.

Example 1

Referring to fig. 1 and 2, an unbound slider comprises a slider body, wherein the slider body is provided with an upper wing plate 1 and a lower wing plate 2 which are relatively parallel, and a guide column 3 arranged at the front end side of the slider body, the guide column 3 is used for connecting the upper wing plate 1 and the lower wing plate 2, the upper wing plate 1 and the lower wing plate 2 are completely symmetrically arranged, the left side and the right side of the upper wing plate 1 are extended towards the direction of the lower wing plate 2 and provided with an upper guide plate 4, the left side and the right side of the lower wing plate 2 are extended towards the direction of the lower wing plate 2 and provided with a lower guide plate 5, and the upper wing plate 1, the lower wing plate 2, the upper guide plate 4 and the lower guide plate 5 are enclosed into a chute for sliding through of a zipper tooth;

an upper concave groove 11 is formed in the front end of the inner side surface of the upper wing plate 1, the upper concave groove 11 extends from the front end side to the rear end side of the upper wing plate 1, the upper concave groove 11 is communicated with the front end port of the sliding groove, and the upper concave groove 11 comprises at least two sections of upper concave areas with different extension lengths;

and/or the front end of the inner side surface of the lower wing plate 2 is provided with a lower concave groove 21, the lower concave groove 21 extends from the front end side to the rear end side of the lower wing plate 2, the lower concave groove 21 is communicated with the front end port of the chute, and the lower concave groove 21 comprises at least two lower concave areas with different extension lengths.

At least a partial region of the upper concave groove 11 extends to the side wall of the guide post 3 and/or at least a partial region of the lower concave groove 21 extends to the side wall of the guide post 3 in the width direction of the slider body. By doing so, it is possible to make the upper concave groove 11 and the lower concave groove 21 have guide areas of sufficient space in both the width direction and the length direction, and it is possible to prevent the areas of the upper concave groove 11 and the lower concave groove 21 from being excessively large, which may cause the strength of the slider to be affected.

The embodiment can provide the pull head which is free of lock and binding on the basis of not having the pull tab and the lock hook, and can slide up and down without pulling the pull tab, so that the zipper is opened and closed, when the zipper strip is subjected to left and right pulling force, the pull head can move upwards to open the zipper, after the external force disappears, the pull head automatically slides downwards under the drive of self weight, so that the closure of the zipper strip is completed, or an instant force is applied to the pull head, the pull head can automatically slide downwards, and compared with the existing non-lock pull head, the pull head can slide more smoothly and close the zipper tooth strip better; and go up the front end department of pterygoid lamina 1 and lower pterygoid lamina 2 all has the recess groove, the guide pull head main part that this recess groove can be better accomplishes the guide to the chain tooth row under the no lock condition, when the zip fastener area of pull head both sides receives the external force effect, because go up recess groove 11/recess groove 21 respectively with go up pterygoid lamina 1/the medial surface of pterygoid lamina 2 down have the difference in height, go up the guide chain tooth row that recess groove 11/recess groove 21 can be better accomplishes the action of separating and closing the chain in the front end department of pull head main part, make the gliding more smooth and easy of the no constraint pull head of this scheme, prevent the condition of blocking.

The upper concave groove 11 comprises a first upper concave area 111 arranged close to the upper guide plate 4 and a second upper concave area 112 arranged close to the guide post 3, the length of the first upper concave area 111 extending along the length direction of the slider main body is longer than that of the second upper concave area 112 extending along the length direction of the slider main body, and the first upper concave area 111 and the second upper concave area 112 are communicated;

the lower concave groove 21 comprises a first lower concave area 211 arranged close to the lower guide plate 5 and a second lower concave area 212 arranged close to the guide post 3, the length of the first lower concave area 211 extending along the length direction of the slider main body is larger than that of the second lower concave area 212 extending along the length direction of the slider main body, and the first lower concave area 211 is communicated with the second lower concave area 212.

By the arrangement, the inner side surfaces of the upper wing plate 1 and the lower wing plate 2 of the slider body are provided with two sections of concave areas with different extension lengths, the contact area between the slider body and the inner side of the fastener element can be reduced by the second upper concave area 112/lower concave area close to the guide post 3, friction can be reduced when the slider is opened and closed, and the fastener element row is smoother when the slider is closed/opened; the extension length of the first upper concave region 111/the first lower concave region 211 is greater than that of the second upper concave region 112/the second lower concave region 212, respectively, so that the contact area between the region of the element row close to the outer side and the slider body can be significantly reduced, the smoothness of slider sliding is further increased, and the extension length of the second upper concave region 112/the lower concave region is small, so that the strength of the upper wing plate 1/the lower wing plate 2 at two sides of the guide post 3 can be ensured.

The second upper concave region 112 extends to the outer side wall of the guide post 3 in the width direction, and the second lower concave region 212 extends to the outer side wall of the guide post 3 in the width direction. By the arrangement, the second upper concave area 112 and the second lower concave area 212 can better guide the teeth contacted with the two sides of the guide post 3 in the sliding process of the slider

The upper wing plate 1 is provided with upper concave grooves 11 in the areas on two sides of the guide post 3, and the lower wing plate 2 is provided with lower concave grooves 21 in the areas on two sides of the guide post 3. By this arrangement, it is ensured that the upper wing plate 1 and the lower wing plate 2 can both complete the guiding sliding of the upper, lower, left and right sides of the element row on both sides of the guiding column 3.

Referring to fig. 3, it is preferable that the first upper concave region 111 and the first lower concave region 211 each have a first inclined wall 22 extending in the length direction of the upper wing plate 1 and a side wall 24 extending in the width direction of the slider body, and the second upper concave region 112 and the second lower concave region 212 each have a second inclined wall 23 extending in the width direction of the slider body;

two ends of the first inclined wall 22 of the first upper concave region 111 are respectively connected with one end of the side wall 24 of the first upper concave region 111 and one end of the second inclined wall 23 of the second upper concave region 112, and the other end of the side wall 24 of the first upper concave region 111 is connected with one side of the upper guide plate 4;

both ends of the first inclined wall 22 of the first lower concave region 211 are respectively connected with one end of the side wall 24 of the first lower concave region 211 and one end of the second inclined wall 23 of the second lower concave region 212, and the other end of the side wall 24 of the first lower concave region 211 is connected with one side of the lower guide plate 5.

By this arrangement, the first upper concave region 111 and the second upper concave region 112 can be integrally connected, and the first lower concave region 211 and the second lower concave region 212 can be integrally connected, while the first inclined side wall and the second inclined side wall can apply guiding forces in two directions to the bottom of the element.

The inclined walls of the first upper concave region 111 and the first lower concave region 211 are inclined upward toward the guide post 3, and the inclined walls of the second upper concave region 112 and the first lower concave region 211 are inclined upward toward the guide post 3.

The outer side surface of the upper wing plate 1 is a curved surface, and/or the outer side surface of the lower wing plate 2 is a curved surface, so that the appearance of the upper wing plate 1 and the lower wing plate 2 is more attractive.

Preferably, the outer side surfaces of the upper wing plate 1/lower wing plate 2 are bent downward and then bent upward along the direction from the front end side to the rear end side of the slider body, so that the middle portions of the upper wing plate 1/lower wing plate 2 are recessed at both ends. Therefore, the contact area between the outer side surface of the slider main body and clothes and human bodies can be reduced, the foreign body sensation during the use of the zipper is reduced, and the use experience of consumers is improved

The rear end side of the inner side surface of the upper wing plate 1 is provided with an upward inclined upper inclined surface, and the rear end side of the inner side surface of the lower wing plate 2 is provided with a downward inclined lower inclined surface 25, so that a first accommodating area 6 with a height larger than that of the sliding groove is formed between the upper inclined surface and the lower inclined surface 25.

Preferably, the inclined surface is an inclined straight surface or an inclined curved surface, so that the two-open zipper with the unbound slider can be better assembled with the other slider to form a double-slider structure, and the rear end side of the other slider can be inserted into the first accommodating area 6 of the unbound slider.

Referring to fig. 4, two sides of the rear end side of the upper guide plate 4 are provided with upper protruding parts 41 extending vertically away from the upper wing plate 1, and an upper clamping slot 411 is arranged at the upper protruding parts 41;

lower protruding parts 51 which vertically extend in a direction deviating from the lower wing plate 2 are arranged on two sides of the rear end side of the lower guide plate 5, and lower clamping grooves 511 are formed in the lower protruding parts 51;

so that a second receiving area 7 is formed between the upper protruding part 41 and the lower protruding part 51, the height of the second receiving area 7 being greater than the height of the chute.

Along the height direction of the slider body, the top wall of the upper clamping slot 411 is higher than the height of the inner side surface of the upper wing plate 1, so that the plane of the top wall of the upper clamping slot 411 is located above the plane of the inner side surface of the upper wing plate 1;

along the height direction of the slider body, the bottom wall of the lower clamping groove 511 is lower than the height of the inner side surface of the lower wing plate 2, so that the plane of the bottom wall of the lower clamping groove 511 is located below the plane of the inner side surface of the lower wing plate 2.

This ensures that the second receiving area 7 has a greater longitudinal cross-sectional dimension than the longitudinal cross-sectional dimension of the slide groove, so that in the use environment of the double-open slide fastener, a further slider can be inserted into the second receiving space of the unbound slider.

Preferably, the dimension of the second accommodating cavity in the height direction is larger than the dimension of the first accommodating area 6 in the height direction, so that the unbound pull head is provided with accommodating areas with two different dimensions, when the dimension of the rear end side of the other pull head is smaller, the other pull head can be assembled in the first accommodating cavity in an inserting manner, when the dimension of the rear end side of the other pull head is larger, the other pull head can be assembled in the second accommodating cavity in an inserting manner, and the unbound pull head can be matched with the pull heads with various dimensions to form a combined pull head, and meanwhile, the aesthetic property of the assembled two pull heads can be guaranteed.

The outer side surface of the upper guide plate 4 is a flat surface along the direction from the front end side to the rear end side of the slider main body, and the outer side surface of the lower guide plate 5 is a flat surface along the direction from the front end side to the rear end side of the slider main body, so that the slider is more flat and attractive.

Example 2

Only the differences from the above-described embodiments are described in the present embodiment, and in the present embodiment, the side walls of the first upper concave region 111 and the first lower concave region 211 extending in the width direction of the slider body may be inclined side walls.

Example 3

Referring to fig. 5, a double-open slide fastener includes a fastener stringer, and a first slider 101 and a second slider 102 mounted on the fastener stringer, wherein the second slider 102 is the non-binding slider according to the above embodiment.

The second slider 102 is located below the first slider 101, the rear end side of the first slider 101 and the rear end side of the second slider 102 are disposed opposite to each other, the first slider 101 can be assembled in the second slider 102 in a plugging manner, and specifically, the rear end side of the first slider 101 can be assembled in the first accommodating cavity or the second accommodating cavity of the second slider 102.

By the arrangement, the second slider 102 can be located at the tail end of the zipper teeth chain when in a normal state, the first slider 101 can be a slider with a locking structure, the first slider can slide to any fixed position through the pull piece, when a user squats down or pulls the zipper teeth chain on two sides of the second slider 102 through external force, the second slider 102 can automatically slide upwards until being contacted and spliced with the first slider 101, at the moment, the lower half of the zipper teeth chain is opened, and when the user stands up or the external force disappears, the second slider 102 slides down under the action of self weight, so that the zipper teeth chain can automatically complete zipper closing. The clothes using the unbound pull head can automatically slide upwards to open the zipper tooth chain belt below when a user squats down, so that the lower hem of the clothes can be opened at a larger angle, the unbound pull head can be widely applied to the sports clothes, the phenomenon that the user frequently pulls the pull piece to open the lower end part of the zipper tooth chain belt is avoided, and the convenience of the user is prompted.

The embodiments of the present utility model are described in detail above. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the core concepts of the utility model. It should be noted that it will be apparent to those skilled in the art that the present utility model may be modified and adapted without departing from the principles of the present utility model, and that such modifications and adaptations are intended to be within the scope of the appended claims.

Claims (10)

1. The utility model provides a no constraint pull head, includes the pull head main part, the pull head main part has upper flange (1) and lower pterygoid lamina (2) of relative parallel to and set up guide post (3) at pull head main part front end side, guide post (3) are used for connecting upper flange (1) and lower pterygoid lamina (2), upper flange (1) left and right sides is equipped with deflector (4) towards the direction extension of lower pterygoid lamina (2), the direction extension of lower pterygoid lamina (2) left and right sides towards lower pterygoid lamina (2) is equipped with deflector (5), upper flange (1), lower pterygoid lamina (2), upper deflector (4), deflector (5) enclose into the spout that is used for supplying the tooth to slide through, its characterized in that:

an upper concave groove (11) is formed in the front end of the inner side of the upper wing plate (1), the upper concave groove (11) extends from the front end side to the rear end side of the upper wing plate (1), the upper concave groove (11) is communicated with the front end port of the sliding groove, and the upper concave groove (11) comprises at least two sections of upper concave areas with different extension lengths;

and/or the front end of the inner side of the lower wing plate (2) is provided with a lower concave groove (21), the lower concave groove (21) is arranged by extending from the front end side to the rear end side of the lower wing plate (2), the lower concave groove (21) is communicated with the front port of the chute, and the lower concave groove (21) comprises at least two sections of lower concave areas with different extension lengths.

2. The unbound slider according to claim 1, characterized in that at least part of the area of the upper recess groove (11) extends to the side wall of the guide post (3) and/or at least part of the area of the lower recess groove (21) extends to the side wall of the guide post (3) in the width direction of the slider body.

3. The unbound slider of claim 1 wherein the upper recess (11) comprises a first upper recess (111) located adjacent the upper guide panel (4) and a second upper recess (112) located adjacent the guide post (3), the first upper recess (111) extending along the length of the slider body a greater length than the second upper recess (112) extending along the length of the slider body, the first upper recess (111) and the second upper recess (112) communicating;

the lower concave groove (21) comprises a first lower concave area (211) which is close to the lower guide plate (5) and a second lower concave area (212) which is close to the guide column (3), the length of the first lower concave area (211) extending along the length direction of the pull head main body is greater than that of the second lower concave area (212) extending along the length direction of the pull head main body, and the first lower concave area (211) is communicated with the second lower concave area (212).

4. A tie-free slider as claimed in claim 3, wherein the second upper recessed region (112) extends widthwise to the outer side wall of the guide post (3), and the second lower recessed region (212) extends widthwise to the outer side wall of the guide post (3).

5. The unbound slider of any of claims 1-4, wherein the upper wing plate (1) is provided with upper concave grooves (11) in the areas on both sides of the guiding post (3), and the lower wing plate (2) is provided with lower concave grooves (21) in the areas on both sides of the guiding post (3).

6. A strapless slider according to claim 3, characterized in that the first upper concave region (111) and the first lower concave region (211) each have a first inclined wall (22) extending in the length direction of the upper wing plate (1) and a side wall (24) extending in the width direction of the slider body, and the second upper concave region (112) and the second lower concave region (212) each have a second inclined wall (23) extending in the width direction of the slider body;

two ends of a first inclined wall (22) of the first upper concave region (111) are respectively connected with one end of a side wall (24) of the first upper concave region (111) and one end of a second inclined wall (23) of the second upper concave region (112), and the other end of the side wall (24) of the first upper concave region (111) is connected with one side of the upper guide plate (4);

the two ends of the first inclined wall (22) of the first lower concave region (211) are respectively connected with one end of the side wall (24) of the first lower concave region (211) and one end of the second inclined wall (23) of the second lower concave region (212), and the other end of the side wall (24) of the first lower concave region (211) is connected with one side of the lower guide plate (5).

7. The unbound slider of claim 1, wherein the rear end side of the inner side of the upper wing plate (1) is provided with an upper inclined surface inclined upward, and the rear end side of the inner side of the lower wing plate (2) is provided with a lower inclined surface (25) inclined downward, so that a first accommodation area (6) having a height greater than the chute is formed between the upper inclined surface and the lower inclined surface (25).

8. The unbound slider according to claim 1 or 7, wherein both sides of the rear end side of the upper guide plate (4) are provided with upper protruding portions (41) extending vertically away from the upper wing plate (1), and an upper clamping groove (411) is provided at the upper protruding portions (41);

lower protruding parts (51) which vertically extend in the direction deviating from the lower wing plate (2) are arranged on two sides of the rear end side of the lower guide plate (5), and lower clamping grooves (511) are formed in the lower protruding parts (51);

so that a second receiving area (7) is formed between the upper projection (41) and the lower projection (51), the height of the second receiving area (7) being greater than the height of the chute.

9. The unbound slider of claim 8, wherein the top wall of the upper clamping groove (411) is higher than the height of the inner side surface of the upper wing plate (1) along the height direction of the slider body, so that the plane of the top wall of the upper clamping groove (411) is located above the plane of the inner side surface of the upper wing plate (1);

along the height direction of the slider main body, the bottom wall of the lower clamping groove (511) is lower than the height of the inner side surface of the lower wing plate (2), so that the plane of the bottom wall of the lower clamping groove (511) is located below the plane of the inner side surface of the lower wing plate (2).

10. A double-opening slide fastener comprising a fastener stringer and a first slider (101) and a second slider (102) mounted on the fastener stringer, characterized in that the second slider (102) is the unbound slider of any of claims 1-9.