Anti-winding zipper head

Abstract

The invention relates to the field of zippers, in particular to an anti-winding zipper head which comprises a zipper head body and a handle which are movably connected, and the handle is rotationally arranged on the zipper head body and used for applying external force to guide the zipper head body to move so as to control opening and closing of zipper teeth. The technical problem that in the process that an existing zipper head is meshed and matched with zipper teeth, a gap between the zipper head and the zipper teeth is too large, so that fabric or cloth belts or thread belts are prone to being rolled into the gap, and the winding phenomenon occurs is solved.

Description

[0001] This application is a divisional application. The original application number is CN202411823125.4, the application date is December 12, 2024, and the invention title is an anti - entanglement zipper slider and its plastic molding process. Technical Field

[0002] The present invention relates to the field of zippers, and particularly to an anti - entanglement zipper slider. Background Art

[0003] A zipper consists of chain teeth, a slider, upper and lower stops (front and rear codes) or locking members, etc. Among them, the chain teeth are the key part, which directly determines the side - pull strength of the zipper. Generally, a zipper has two tape strips, each with a row of chain teeth, and the two rows of chain teeth are arranged in an interlaced manner. The slider clamps the chain teeth on both sides and slides with the help of a pull tab, enabling the chain teeth on both sides to mesh or disengage from each other.

[0004] In the existing zipper, due to the meshing connection between the zipper slider and the chain, during the pulling process, the fabric tape on the chain or the fabric sewn to the chain tape is easily rolled into the gap between the zipper chain teeth and the cogs. On the one hand, it causes the zipper chain teeth to get stuck and unable to be pulled. On the other hand, the hard contact between the zipper slider and the chain teeth causes tensile damage to the fabric. Especially for high - grade textile fabrics or high - grade leather materials, this tensile damage is often irreversible.

[0005] The invention patent with the Chinese patent application number 202110400264.6 discloses a YG zipper head two - way safety lock and its production process. The key points of its technical solution include a slider body, a pull tab, and an elastic member. An installation groove for installing the pull tab is formed between the slider body and the elastic member. The slider body is provided with a connection groove for installing the elastic member and a limiting groove for the elastic member to extend out. The pull tab is integrally cold - punched. The pull tab includes a flat upper surface layer and a flat lower surface layer. The pull tab includes a rotating part, and the rotating part is rotatably connected in the installation groove. A convex block is provided on the rotating part. When the pull tab is perpendicular to the slider body, the elastic member retracts into the limiting groove. When the pull tab rotates to both sides of the slider body, the elastic member extends out of the limiting groove. This YG zipper head two - way safety lock can lock the slider in both directions, improve the reminder effect for users, and reduce accidents. However, the technical solution proposed by the above - mentioned invention does not provide a solution to the problem that the existing zipper slider is prone to pulling the fabric, and various zipper sliders applied on the market still have the technical problem of winding and pulling. Summary of the Invention

[0006] Therefore, in order to solve the above problems, the present invention proposes an anti-entanglement zipper head, which solves the technical problem that the gap between the existing zipper head and the chain teeth is too large, which makes it easy for the fabric, cloth tape or wire tape to be rolled into the gap and cause entanglement.

[0007] To achieve the above-mentioned object, the present invention adopts the following technical scheme: an anti-entanglement zipper chain head, comprising a chain head and a handle that are movably connected, wherein the handle is rotatably arranged on the chain head and is used to apply external force to guide the chain head to move, thereby controlling the opening and closing of the zipper teeth; The chain head comprises a support plate, a connecting mechanism, and a meshing mechanism, the support plate comprises an upper functional surface and a lower functional surface, the connecting mechanism is arranged on the upper functional surface of the support plate, the meshing mechanism is arranged on the lower functional surface of the support plate, the connecting mechanism is used to be rotatably connected with the handle, the meshing mechanism comprises a first meshing protrusion, a second meshing protrusion and a central meshing protrusion, the central meshing protrusion is arranged on the central axis of the support plate, the first meshing protrusion and the second meshing protrusion are symmetrically arranged on both sides of the central meshing protrusion, the first meshing protrusion is provided with a first bonding surface close to the central meshing protrusion, the second meshing protrusion is provided with a second bonding surface close to the central meshing protrusion, the first bonding surface and the second bonding surface are symmetrical to each other, the first bonding surface is provided with a first anti-winding structure, and the second bonding surface is provided with a second anti-winding structure, and during use, the first anti-winding structure and the second anti-winding structure are rollingly connected with the cloth tape of the zipper; The handle comprises a connecting rod and a pulling block which are fixedly connected.

[0008] Furthermore, the connecting mechanism includes a first connecting seat, a second connecting seat, and a snap-fitting pin. The first connecting seat and the second connecting seat are both arranged on the central axis of the support plate. A first slot is arranged on a side surface of the first connecting seat close to the second connecting seat, and a second slot is arranged on the second connecting seat. The snap-fitting pin is arranged in the first slot through a torsion spring and is snapped between the first slot and the second slot. The handle is rotated with the connecting mechanism by passing through the second connecting seat.

[0009] Furthermore, the snap-fitting pin is provided with a pin, and the pin penetrates downwardly through the upper functional surface of the support plate, and a top block is provided at the center position of the connecting rod. When the connecting rod is rotated until the top block abuts against the snap-fitting pin, the pin is lifted upward, and when the connecting rod is rotated until the top block is separated from the snap-fitting pin, the pin is inserted downward into the support plate.

[0010] Furthermore, the first anti-winding structure and the second anti-winding structure have the same structure, and the first anti-winding structure includes a plurality of clamping grooves arranged on the first bonding surface and balls embedded in the clamping grooves.

[0011] A plastic molding process for an anti-winding zipper pull comprises the following steps: S1, mixing raw materials; picking up raw materials for mixing, the raw materials include polycarbonate particles and ABS resin particles, the two are mixed in a ratio of 1:1, the particles are mixed in a molten state by a heating device and further stirred to obtain a mixed raw material; S2, heating the raw material conveying flow channel to 225 degrees Celsius to 325 degrees Celsius, and introducing the raw material into the zipper chain head plastic molding device through the raw material conveying flow channel for injection molding operation; S3, the injection mold is subjected to pressure holding treatment, and the pressure holding time is 1.5 seconds to 3.0 seconds; S4, shaping and cooling; cooling the zipper head by a cooling device built into the zipper head plastic molding device, so that the temperature of the zipper head plastic molding device is quickly reduced to 40 degrees Celsius-60 degrees Celsius, and then demolding, and then placing it on a cooling rack to cool to room temperature, to obtain a zipper head; S5. Assemble: Assemble the formed chain head and handle.

[0012] Furthermore, in step S4, the cooling device performs auxiliary demoulding operations on the molded zipper head during the shaping and cooling process.

[0013] Furthermore, the zipper link plastic molding device includes a plastic molding upper template and a plastic molding lower template that cooperate with each other, a first molding cavity is arranged on a side surface of the plastic molding upper template close to the plastic molding lower template, and a second molding cavity is arranged on a side surface of the plastic molding lower template close to the plastic molding upper template, the first molding cavity and the second molding cavity together constitute a plastic molding cavity, and the cooling device includes a first cooling part and a second cooling part, the first cooling part is arranged in the plastic molding upper template, and the second cooling part is arranged in the plastic molding lower template.

[0014] Furthermore, the first cooling part and the second cooling part have the same structure, the first cooling part is close to the first molding cavity, and the second cooling part is close to the second molding cavity. The first cooling part includes closely arranged cooling pipes and elastic toggle plates arranged on the inner walls of the cooling pipes. The cooling pipes are used for the circulation of coolant to cool the first molding cavity through heat transfer.

[0015] Furthermore, the elastic toggle plates are arranged around the inner sidewall of the cooling pipe, and the vertical plane projections of the elastic toggle plates do not overlap with each other.

[0016] Furthermore, the elastic toggle plate is a thin metal plate.

[0017] By adopting the foregoing technical solutions, the beneficial effects of the present invention are as follows: 1. Compared with the existing zipper slider, the main improvement of the present invention lies in the structural improvement at the connection between the zipper slider and the zipper tape, which avoids the phenomenon that the surrounding fabric or thread will be caught and cannot be pulled out during the back-and-forth pulling of the zipper slider, resulting in jamming. In severe cases, it will also cause damage to valuable fabrics. At the same time, it can make the pulling process of the zipper slider smoother. Specifically, a first fitting surface is provided on the first engaging portion of the zipper slider, and a second fitting surface is also provided on the second engaging portion. The first fitting surface and the second fitting surface are the parts where the zipper slider directly contacts the zipper tape. In the conventional structural design, the connection method of this part is a sliding connection. However, the present invention innovatively adopts a first anti-winding structure on the first fitting surface and a second anti-winding structure on the second fitting surface, and realizes a rolling connection with the zipper tape through the first anti-winding structure and the second anti-winding structure, replacing the original sliding connection. The advantages are as follows: First, the rolling connection method can make the clothing fabric or thread that may enter the zipper slider through the gap stop moving when it reaches the end of the gap. The principle is that one side of the fabric is in rolling connection with the zipper slider, and the friction between the two is greatly reduced, and the pulling force during the meshing of the zipper slider and the zipper teeth is offset. Second, when encountering a fabric with a relatively rough surface or when the fabric is accidentally wound into the gap of the zipper slider, it can also be easily pulled out. The principle is also that one end of the fabric is in rolling connection with the zipper slider, rather than the traditional sliding connection. When the wound fabric is pulled out by an external force, since the fabric is in rolling connection with the zipper slider and there is no friction between the two, it can be easily pulled out without being damaged by pulling.

[0018] 2. Both the first anti-winding structure and the second anti-winding structure in the present invention adopt a ball structure. On the one hand, the ball structure can ensure a rolling connection between the zipper teeth and the zipper tape, which can reduce the generation of friction compared with the traditional sliding connection, thereby reducing the frictional loss between the zipper teeth and the zipper slider and prolonging the service life of the zipper. On the other hand, the zipper teeth are meshed by the ball adopting a push-type meshing method, and the efficiency is higher and smoother.

[0019] 3. The main improvement of the plastic molding process for zipper head proposed in the present invention compared with the traditional zipper head molding process is that: by performing molding and cooling while performing auxiliary demolding in step S4, the two are performed simultaneously to improve the production efficiency of the zipper head. As is known to all, the key points in the plastic molding process are the molding and demolding of the product. During the molding process, it is necessary to avoid the formation of cavities and surface pits or bubbles inside the product. After the molding is completed, it is necessary to cool down and demold in time. The two are key links in the plastic molding process. The present invention integrates and improves the two most critical links, and the working processes of the two cooperate with each other. The principle is that the first cooling part and the second cooling part are respectively arranged in the plastic molding upper template and the plastic molding lower template, and the two are respectively close to the first molding cavity and the second molding cavity. The cooling method Cooling is performed by heat transfer using a coolant, wherein both are tubular structures of cooling tubes, through which the coolant circulates, and a toggle plate is provided in the cooling tube. The elastic toggle plate is arranged around the inner wall of the cooling tube and is arranged in a direction pointing to the central axis of the cooling tube, that is, it is parallel to the cross-section of the cooling tube. In this way, when the coolant circulates, it will impact the elastic toggle plate on the inner wall of the cooling tube, and each elastic toggle plate will undergo elastic deformation after the impact, and the relatively arranged elastic toggle plates will abut against each other, thereby generating vibration and transmitting it to the first molding cavity and the second molding cavity, so as to cool and vibrate the molded zipper chain head and perform demolding operations, which greatly improves work efficiency. At the same time, along with the generation of vibration, bubbles and holes that may be generated inside and on the surface of the zipper chain head can also be removed.

[0020] 4. The elastic toggle plate in the present invention is made of a thin metal plate. The metal plate material has better metal elasticity and better resilience. The force generated by the toggle collision when the plates are directly pressed against each other is greater, and the vibration generated is more obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle; Figure 3 It is a schematic diagram of the top view structure of the present invention; Figure 4 It is a bottom view structural schematic diagram of the present invention; Figure 5 It is a side structural sectional view of the present invention; Figure 6 This is a flow chart of the plastic molding process of the present invention; Figure 7 Schematic diagram of the internal structure of the plastic forming device for the zipper slider of the present invention; Figure 8 Top view of the arrangement structure of the first cooling part in the present invention; Figure 9 Cross-sectional view of the cooling pipe in the present invention. Specific embodiments

[0022] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0023] Please refer to Figures 1-9 , the present invention provides an anti-tangling zipper slider, which includes a slider 1 and a pull tab 2 that are movably connected. The pull tab 2 is rotatably arranged on the slider 1 and is used to apply an external force to guide the movement of the slider 1, thereby controlling the opening and closing of the zipper teeth; The slider 1 includes a support plate 11, a connection mechanism 12, and an engagement mechanism 13. The support plate 11 includes an upper functional surface and a lower functional surface. The connection mechanism is arranged on the upper functional surface of the support plate 11, and the engagement mechanism 13 is arranged on the lower functional surface of the support plate 11. The connection mechanism 12 is used for rotatably connecting with the pull tab 2. The engagement mechanism 13 includes a first engagement convex portion 131, a second engagement convex portion 132, and a central engagement convex portion 133. The central engagement convex portion 133 is arranged on the central axis of the support plate 11. The first engagement convex portion 131 and the second engagement convex portion 132 are symmetrically arranged on both sides of the central engagement convex portion 133. A first fitting surface 1311 is arranged on the first engagement convex portion 131 close to the central engagement convex portion 133, and a second fitting surface 1321 is arranged on the second engagement convex portion 132 close to the central engagement convex portion 133. The first fitting surface 1311 and the second fitting surface 1321 are symmetrical to each other. A first anti-tangling structure is arranged on the first fitting surface 1311, and a second anti-tangling structure is arranged on the second fitting surface 1321. During use, the first anti-tangling structure and the second anti-tangling structure are in rolling connection with the cloth tape of the zipper; The pull tab 2 includes a connecting rod 21 and a pull block 22 that are fixedly connected.

[0024] The connecting mechanism 12 includes a first connecting seat 121, a second connecting seat 122, and a fastening bolt 123. The first connecting seat 121 and the second connecting seat 122 are both arranged on the central axis of the support plate 11. On one side of the first connecting seat 121 close to the second connecting seat 122, a first card slot 1211 is provided. A second card slot 1221 is provided on the second connecting seat 122. The fastening bolt 123 is arranged in the first card slot 1211 through a torsion spring and is fastened between the first card slot 1211 and the second card slot 1221. The handle 2 is rotatably connected to the connecting mechanism 12 by passing through the second connecting seat 122.

[0025] The fastening bolt 123 is provided with a pin 1231. The pin 1231 penetrates downward through the upper functional surface of the support plate 11. A top block 211 is provided at the central position of the connecting rod 21. When the connecting rod 21 rotates to a position where the top block 211 abuts against the fastening bolt 123, the pin 1231 is lifted upward. When the connecting rod 21 rotates to a position where the top block 211 is separated from the fastening bolt 123, the pin 1231 is inserted downward into the support plate 11. The first anti-tangling structure and the second anti-tangling structure have the same structure. The first anti-tangling structure includes four card slots 31 provided on the first fitting surface and balls 3 embedded in the card slots 31. By providing the first anti-tangling structure and the second anti-tangling structure, the original connection method between the zipper slider and the zipper pocket is changed from a sliding connection to a rolling connection, reducing the friction between the two and reducing the risk of entanglement.

[0026] This embodiment simultaneously presents a plastic molding process for the above-mentioned zipper slider, a plastic molding process for an anti-tangling zipper slider, including the following steps: S1. Raw material mixing: Pick up raw materials for mixing. The raw materials include polycarbonate particles and ABS resin particles, which are mixed in a ratio of 1:1. After the particles are mixed, they are melted and further stirred through a heating device to obtain a mixed raw material; S2. Heat the raw material conveying channel to 225 °C - 325 °C, and introduce the raw materials into the zipper slider plastic molding device through the raw material conveying channel for injection molding operations; S3. Perform a pressure holding process on the injection mold, and the pressure holding time is 1.5 seconds - 3.0 seconds; S4. Shaping and cooling: Cool the zipper slider through a cooling device built in the zipper slider plastic molding device to quickly reduce the temperature of the zipper slider plastic molding device to 40 °C - 60 °C, then demold, and then place it on a cooling rack to cool to room temperature to obtain the zipper slider; S5. Assembly: Assemble the molded slider and the handle.

[0027] Among them, in step S4, the cooling device performs auxiliary demoulding operation on the formed zipper head during the shaping and cooling process.

[0028] In the plastic molding process, the zipper head plastic molding device includes a plastic molding upper template 4 and a plastic molding lower template 5 that cooperate with each other, a first molding cavity 41 is arranged on a side surface of the plastic molding upper template 4 close to the plastic molding lower template 5, and a second molding cavity 51 is arranged on a side surface of the plastic molding lower template 5 close to the plastic molding upper template 4. The first molding cavity 41 and the second molding cavity 51 together constitute a plastic molding cavity, and the cooling device includes a first cooling part 6 and a second cooling part 7, the first cooling part 6 is arranged in the plastic molding upper template 4, and the second cooling part 7 is arranged in the plastic molding lower template 5, the first cooling part 6 and the second cooling part 7 have the same structure, the first cooling part 6 is close to the first molding cavity 41, and the second cooling part 7 is close to the second molding cavity 51. The first cooling part 6 includes a closely arranged cooling tube and an elastic toggle plate 8 arranged on the inner wall of the cooling tube. The cooling tube is used for the circulation of coolant to cool the first molding cavity 41 by heat transfer. The elastic toggle plate 8 is arranged on the inner wall of the cooling tube, and the vertical projections of each elastic toggle plate 8 do not overlap with each other. The elastic toggle plate 8 is a thin metal plate. When the elastic toggle plate 8 is impacted by the coolant, the adjacent elastic toggle plates 8 will contact and collide with each other and vibrate. The coolant is circulated intermittently to ensure that the elastic toggle plates 8 collide with each other at a certain frequency and generate vibrations of a certain frequency. At this time, the coolant is used to cool and dissipate the heat of the plastic molding cavity on the one hand, and on the other hand, it drives the elastic toggle plate 8 to vibrate to facilitate mold demolding and avoid bubbles and holes on its surface and inside.

[0029] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0030] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An anti-entanglement zipper pull, characterized in that: It comprises a movably connected chain head and a handle, wherein the handle is rotatably arranged on the chain head and is used to apply an external force to guide the chain head to move, thereby controlling the opening and closing of the zipper teeth; The chain head comprises a support plate, a connecting mechanism, and a meshing mechanism, the support plate comprises an upper functional surface and a lower functional surface, the connecting mechanism is arranged on the upper functional surface of the support plate, the meshing mechanism is arranged on the lower functional surface of the support plate, the connecting mechanism is used to be rotatably connected with the handle, the meshing mechanism comprises a first meshing protrusion, a second meshing protrusion and a central meshing protrusion, the central meshing protrusion is arranged on the central axis of the support plate, the first meshing protrusion and the second meshing protrusion are symmetrically arranged on both sides of the central meshing protrusion, the first meshing protrusion is provided with a first bonding surface close to the central meshing protrusion, the second meshing protrusion is provided with a second bonding surface close to the central meshing protrusion, the first bonding surface and the second bonding surface are symmetrical to each other, the first bonding surface is provided with a first anti-winding structure, and the second bonding surface is provided with a second anti-winding structure, and during use, the first anti-winding structure and the second anti-winding structure are rollingly connected with the cloth tape of the zipper; The handle includes a fixedly connected connecting rod and a pull block, the connecting mechanism includes a first connecting seat, a second connecting seat, and a buckling pin, the first connecting seat and the second connecting seat are both arranged on the central axis of the support plate, a first card slot is arranged on a side surface of the first connecting seat close to the second connecting seat, and a second card slot is arranged on the second connecting seat, the buckling pin is arranged in the first card slot through a torsion spring and buckled between the first card slot and the second card slot, and the handle is rotated with the connecting mechanism by passing through the second connecting seat. , the buckling pin is provided with a pin, and the pin penetrates downwardly through the upper functional surface of the support plate, and a top block is provided at the center position of the connecting rod, when the connecting rod is rotated until the top block abuts against the buckling pin, the pin is lifted upward, and when the connecting rod is rotated until the top block is separated from the buckling pin, the pin is inserted downward into the support plate, the first anti-winding structure and the second anti-winding structure have the same structure, and the first anti-winding structure includes a plurality of clamping grooves arranged on the first fitting surface and balls embedded in the clamping grooves.

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