Anti-pinch self-locking zipper and manufacturing method thereof

Abstract

The invention belongs to the technical field of zippers, and particularly relates to an anti-pinch self-locking zipper and a manufacturing method thereof.According to the anti-pinch self-locking zipper and the manufacturing method thereof, an automatic sewing machine is arranged, a motor drives a screw to rotate, and the screw drives a moving table to rotate and move; however, due to the fact that the sliding blocks of the moving tables are in sliding fit with the guide rails of the rack, it is guaranteed that the moving tables stably run along the straight line all the time, moving mechanisms are arranged in front of and behind the sewing units of the rack, the zipper belts and the anti-clamping belts are pressed on the moving tables through pressing rollers, and it is guaranteed that the zipper belts and the anti-clamping belts are located on the same horizontal line during sewing through movement of the front moving table and the rear moving table. Lifting of the lifting frame can drive the pressing roller rotationally connected with the lifting frame through the bearing to ascend and descend, and the downward pressing stroke can be automatically adjusted for zipper belts with different thicknesses such as protrusions with zipper teeth.

Description

Technical Field

[0001] This invention relates to the field of zipper technology, and in particular to an anti-pinch self-locking zipper and its manufacturing method. Background Technology

[0002] A zipper is a reversible opening and closing device widely used in clothing, bags, tents, footwear and other fields. Its core function is to use a sliding element to make the teeth on two toothed fabric strips mesh or separate, thereby achieving closure or opening.

[0003] In existing technologies, traditional zippers, especially when quickly zipped or closed, can cause clothing edges, particularly inner layers, to get caught between the zipper head and teeth, resulting in pinching, scratching, or even damage to clothing, affecting the user experience. Furthermore, existing self-locking zippers use magnetic self-locking, which is expensive and susceptible to strong magnetic fields. Summary of the Invention

[0004] In the prior art, when the zipper is opened and closed quickly, inner clothing is easily caught between the zipper head and the zipper teeth, causing pinching, scratching or even damage to the clothing. In addition, existing self-locking zippers use magnetic self-locking, which is expensive and susceptible to the influence of strong magnetic fields. This invention proposes an anti-pinch self-locking zipper and its manufacturing method.

[0005] The present invention proposes an anti-pinch self-locking zipper and its manufacturing method, comprising a zipper body, wherein the zipper body includes a zipper tape, a slide bar, zipper teeth, a zipper head, and a pull ring.

[0006] The zipper strip is fixed to one side of the slide bar by a high-frequency hot pressing process, and the zipper teeth are integrally formed to the other side of the slide bar by an injection molding process.

[0007] Preferably, the upper and lower surfaces of the zipper tape are both sewn with anti-pinch features, the zipper head is slidably connected to the outer side of the slide bar, and the pull ring is movably sleeved on the connecting ring of the zipper head.

[0008] Preferably, the zipper tape is made of polyester fiber, the anti-slip material is nylon, the slide is made of polyoxymethylene, and the zipper teeth, zipper head, and pull ring are all made of zinc alloy.

[0009] Preferably, the outer end of the slider is provided with an arc-shaped groove, and the inner end of the zipper head is slidably inserted into the groove with a ball rod. The outer surface of the ball rod is slidably engaged with the inner wall of the arc-shaped groove. A spring is fixedly installed at one end of the ball rod. The spring is fixedly installed on the bottom wall of the groove of the zipper head. The pre-compression of the spring matches the fitting clearance between the ball rod and the arc-shaped groove.

[0010] The present invention proposes a method for manufacturing an anti-pinch self-locking zipper, comprising the following steps:

[0011] Step 1: Using an injection molding machine, the zipper teeth and the other side of the slider are integrally formed through injection molding. Then, a high-frequency hot press is used to fix the zipper strip and one side of the slider by high-frequency hot pressing.

[0012] Step 2: Attach the anti-pinch tape to the top and bottom sides of the zipper tape. The anti-pinch tape below the zipper tape, which is in contact with the inner garment, has an interlaced weave structure, while the anti-pinch tape above the zipper tape has a non-interlaced weave structure. After bonding, use an automatic sewing machine to sew the anti-pinch tape to the zipper tape to secure it.

[0013] Step 3: Pre-assemble the stick, spring, and zipper head to ensure that the stick can slide smoothly in the groove of the zipper teeth and that the spring can provide a stable preload. Place the assembled zipper head onto the slide bar, aligning and engaging the stick on the inner end of the zipper head with the arc groove on the outer end of the slide bar to form a sliding fit, thereby obtaining the zipper body.

[0014] Preferably, the automatic sewing machine in step two includes a frame with sewing units, and a moving mechanism is provided on the upper surface of the frame. The moving mechanism includes a screw and a moving table, and the rotation of the screw drives the moving table to move.

[0015] The upper surface of the frame is provided with a pressing mechanism, which includes a pressure roller. The descent of the pressure roller presses the zipper belt and the anti-pinch belt.

[0016] Preferably, the moving mechanism further includes a motor, which is fixedly installed on the inner wall of the groove in the base plate of the frame, and the output shaft of the motor is rotatably connected to the groove in the base plate of the frame through a bearing.

[0017] Preferably, the output shaft of the motor is fixedly installed to one end of the screw, the screw is rotatably connected to the inner wall of the groove of the frame base plate through a bearing, the movable table is threadedly connected to the outer surface of the screw, and the sliders at both ends of the movable table are slidably engaged with the guide rails of the frame base plate.

[0018] Preferably, the pressing mechanism further includes an electric push rod, which is fixedly installed on the upper surface of the moving platform. A lifting frame is fixedly installed at one end of the telescopic rod of the electric push rod. The sliding rod of the lifting frame is slidably inserted into the groove on the upper surface of the moving platform. The pressure roller is rotatably connected to the inner wall of the lifting frame through a bearing.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. By incorporating a zipper belt, slider, zipper teeth, zipper head, and pull ring, and with double-sided sewing on the zipper belt, all-around protection is ensured. Pulling the pull ring on the zipper head allows the zipper teeth to engage and disengage, thus achieving closure or opening. The arc-shaped groove provides a locking point. When the zipper head is stationary, the ball bar, under the action of a spring, engages in the arc-shaped groove to prevent the zipper from slipping off automatically, achieving self-locking. When the pull ring is pulled, the lateral force overcomes the spring force, causing the ball bar to slide out of the arc-shaped groove, allowing the zipper head to move. This structure is simpler than the traditional hook self-locking structure and has a lower failure rate compared to the magnetic self-locking structure. It solves the technical problems of existing self-locking zippers using magnetic self-locking, which are costly and susceptible to strong magnetic field environments.

[0021] 2. By setting up an automatic sewing machine, the motor drives the screw to rotate, and the screw drives the moving platform to rotate and move. However, due to the sliding cooperation between the slider of the moving platform and the guide rail of the machine frame, it is ensured that the moving platform always runs smoothly in a straight line. Moving mechanisms are set at the front and rear of the sewing unit of the machine frame. The pressure roller presses the zipper tape and anti-pinch tape onto the moving platform. Through the movement of the front and rear moving platforms, it is ensured that the zipper tape and anti-pinch tape are sewn on the same horizontal line, ensuring the straightness and beauty of the sewing stitch. The extension and retraction of the electric push rod can drive the lifting frame to rise and fall. The rise and fall of the lifting frame can drive the pressure roller connected to it by bearing to rise and fall. For zipper tapes of different thicknesses, such as the protrusions with zipper teeth, the downward stroke can be automatically adjusted. This solves the technical problem in the existing technology that, during the use of traditional zippers, especially when quickly opening and closing, the edges of clothing, especially inner layers of clothing, are easily caught between the zipper head and the zipper teeth, causing clothing to be caught, scratched, or even damaged, affecting the user experience. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an anti-pinch self-locking zipper and its manufacturing method proposed in this invention;

[0023] Figure 2 This is a perspective view of the anti-pinch self-locking zipper and its manufacturing method proposed in this invention, showing the anti-pinch strap structure.

[0024] Figure 3 This is a perspective view of the pull ring structure of an anti-pinch self-locking zipper and its manufacturing method proposed in this invention;

[0025] Figure 4 This is a perspective view of the slide structure of an anti-pinch self-locking zipper and its manufacturing method proposed in this invention;

[0026] Figure 5 This is a perspective view of the spring structure of an anti-pinch self-locking zipper and its manufacturing method proposed in this invention;

[0027] Figure 6This is a perspective view of the moving platform structure of the anti-pinch self-locking zipper and its manufacturing method proposed in this invention;

[0028] Figure 7 This is a perspective view of the electric push rod structure of the anti-pinch self-locking zipper and its manufacturing method proposed in this invention;

[0029] Figure 8 This is a perspective view of the motor structure of an anti-pinch self-locking zipper and its manufacturing method proposed in this invention;

[0030] Figure 9 This is an exploded view of the screw structure of the anti-pinch self-locking zipper and its manufacturing method proposed in this invention.

[0031] In the diagram: 1. Zipper body; 2. Zipper tape; 21. Anti-pinch device; 22. Zipper head; 23. Slide bar; 24. Pull ring; 3. Zipper tooth; 4. Arc groove; 41. Ball bar; 42. Spring; 5. Frame; 51. Motor; 6. Screw; 61. Moving table; 7. Electric push rod; 71. Lifting frame; 72. Pressure roller. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Reference Figures 1-9 A self-locking anti-pinch zipper and its manufacturing method are disclosed. The zipper body 1 includes a zipper tape 2, a slide strip 23, zipper teeth 3, a zipper head 22, and a pull ring 24.

[0034] The zipper tape 2 is fixed to one side of the slide bar 23 by a high-frequency hot pressing process, and the zipper teeth 3 are integrally formed with the other side of the slide bar 23 by an injection molding process.

[0035] Specifically, anti-pinch straps 21 are sewn on both the upper and lower surfaces of the zipper tape 2. The zipper head 22 is slidably connected to the outer side of the slide bar 23. The pull ring 24 is movably sleeved on the connecting ring of the zipper head 22. By setting the anti-pinch straps 21 between the zipper tape 2 and the inner layer of clothing, an additional physical protective barrier is added to prevent the edges of clothing or skin from being easily caught in the gaps of the zipper teeth 3, causing pain points of pinching flesh or clothing. The double-sided sewing ensures all-round protection. No matter how the zipper is bent or subjected to force, foreign objects cannot easily contact the internal zipper teeth. By sliding the zipper head 22 and the slide bar 23, the zipper teeth 3 can be engaged and disengaged by pulling the zipper head 22 through the pull ring 24, thereby achieving closure or opening.

[0036] Specifically, the zipper tape 2 is made of polyester fiber, the anti-pinch tape 21 is made of nylon, the slider 23 is made of polyoxymethylene, and the zipper teeth 3, the zipper head 22, and the pull ring 24 are all made of zinc alloy. The zipper tape 2, being made of polyester fiber, serves as the base of the zipper and provides the main tensile strength. The anti-pinch tape 21, being made of nylon, provides a flexible feel and protection. The slider 23, being made of polyoxymethylene, serves as the sliding track and support, and has an extremely low coefficient of friction and excellent self-lubricating properties. The zipper teeth 3, the zipper head 22, and the pull ring 24, all being made of zinc alloy, serve as the force-bearing and locking components, and have high mechanical strength and hardness, making them less prone to deformation.

[0037] Specifically, the outer end of the slide bar 23 has an arc-shaped groove 4, and the inner end of the zipper head 22 is slidably inserted into the groove with a ball rod 41. The outer surface of the ball rod 41 is slidably engaged with the inner wall of the arc-shaped groove 4. A spring 42 is fixedly installed at one end of the ball rod 41. The spring 42 is fixedly installed on the bottom wall of the groove in the zipper head 22. The pre-compression of the spring 42 matches the fit clearance between the ball rod 41 and the arc-shaped groove 4. The arc-shaped groove 4 on the outer end of the slide bar 23 provides a locking point. The zipper head 22 is positioned such that the ball rod 41 slides into the arc groove 4, allowing for switching between self-locking and unlocking. When the zipper head 22 is stationary, the ball rod 41 is engaged in the arc groove 4 under the action of the spring 42, preventing the zipper from slipping off automatically, thus achieving self-locking. When the pull ring 24 is pulled, the lateral force overcomes the force of the spring 42, causing the ball rod 41 to slide out of the arc groove 4, allowing the zipper head 22 to move. This structure is simpler than the traditional hook self-locking structure and has a lower failure rate compared to the magnetic self-locking structure.

[0038] The present invention proposes a method for manufacturing an anti-pinch self-locking zipper, comprising the following steps:

[0039] Step 1: Using an injection molding machine, the zipper tooth 3 and the other side of the slide 23 are integrally formed by injection molding. Then, using a high-frequency hot press, the zipper tape 2 and one side of the slide 23 are fixed by high-frequency hot pressing welding.

[0040] Step 2: Attach the anti-pinch strap 21 to the upper and lower sides of the zipper strap 2. The anti-pinch strap 21 below the zipper strap 2, that is, the anti-pinch strap 21 in contact with the inner garment, has an interlaced weave structure, while the anti-pinch strap 21 above the zipper strap 2 has a non-interlaced weave structure. After the bonding is completed, use an automatic sewing machine to sew the anti-pinch strap 21 to the zipper strap 2 to fix it in place.

[0041] Step 3: Pre-assemble the ball stick 41, spring 42 and zipper head 22 to ensure that the ball stick 41 can slide smoothly in the groove of the zipper tooth 3 and that the spring 42 can provide a stable preload. Then, put the assembled zipper head 22 onto the slide bar 23 so that the ball stick 41 at the inner end of the zipper head 22 is aligned and engaged with the arc groove 4 at the outer end of the slide bar 23 to form a sliding fit, thereby obtaining the zipper body 1.

[0042] like Figure 6-9 As shown, the automatic sewing machine in step two includes a frame 5 with sewing units. A moving mechanism is provided on the upper surface of the frame 5. The moving mechanism includes a screw 6 and a moving table 61. The rotation of the screw 6 drives the moving table 61 to move.

[0043] Specifically, the moving mechanism also includes a motor 51, which is fixedly installed on the inner wall of the groove in the base plate of the frame 5. The output shaft of the motor 51 is rotatably connected to the groove in the base plate of the frame 5 through a bearing. The motor 51 is fixedly installed to the frame 5, and the output shaft of the motor 51 is rotatably connected to the frame 5 through a bearing to ensure the stability of the rotation of the output shaft of the motor 51.

[0044] Specifically, the output shaft of motor 51 is fixedly installed at one end of screw 6. Screw 6 is rotatably connected to the inner wall of the groove in the base plate of frame 5 through bearings. Moving table 61 is threadedly connected to the outer surface of screw 6. The sliders at both ends of moving table 61 are slidably engaged with the guide rails of the base plate of frame 5. The output shaft of motor 51 is fixedly installed with screw 6 to drive screw 6 to rotate. Screw 6 is rotatably connected to frame 5 through bearings to ensure the stability of screw 6 rotation. Moving table 61 is threadedly connected to screw 6 to drive moving table 61 to rotate and move. However, due to the sliding engagement between the slider of moving table 61 and the guide rail of frame 5, moving table 61 is always ensured to run smoothly along a straight line. Moving mechanisms are set at the front and rear of the sewing unit of frame 5. Pressure roller 72 presses zipper tape 2 and anti-pinch tape 21 onto moving table 61. Through the movement of the two moving tables 61, it is ensured that zipper tape 2 and anti-pinch tape 21 are on the same horizontal line when sewing, ensuring the straightness and aesthetics of the sewing stitch.

[0045] The upper surface of the frame 5 is provided with a pressing mechanism, which includes a pressure roller 72. The descent of the pressure roller 72 presses the zipper belt 2 and the anti-pinch belt 21.

[0046] Specifically, the pressing mechanism also includes an electric push rod 7, which is fixedly installed on the upper surface of the moving table 61. A lifting frame 71 is fixedly installed at one end of the telescopic rod of the electric push rod 7. The slide rod of the lifting frame 71 is slidably inserted into the groove on the upper surface of the moving table 61. The pressure roller 72 is rotatably connected to the inner wall of the lifting frame 71 through a bearing. It is fixedly installed to the moving table 61 by the electric push rod 7. The extension and retraction of the electric push rod 7 can drive the lifting frame 71 to rise and fall. The slide rod of the lifting frame 71 is slidably inserted into the moving table 61 to ensure the stability of the lifting frame 71. The rise and fall of the lifting frame 71 can drive the pressure roller 72, which is rotatably connected to it through a bearing, to rise and fall. For zipper tapes 2 of different thicknesses, such as protrusions with zipper teeth 3, the pressing stroke can be automatically adjusted.

[0047] Working principle: The zipper tape 2, which has been fixed with the slide strip 23 and zipper teeth 3, and the anti-pinch tape 21, which has been initially fixed, are placed on the material roll shaft of the unwinding machine, led out, and passed through the tension adjusting roller and pressure roller 72 at the unwinding end in sequence, and finally fixed on the material roll shaft of the rewinding machine.

[0048] The control system starts the unwinding motor 51 to unwind the material in low-speed mode. The zipper belt 2 and the anti-pinch belt 21 enter the sewing area and first come into contact with the moving mechanism and pressing mechanism located at the front end of the sewing unit. The electric push rod 7 on the moving mechanism is activated, driving the pressure roller 72 to descend and press the zipper belt 2 and the anti-pinch belt 21 onto the upper surface of the moving table 61. The control system monitors the position of the front and rear moving tables 61 in real time to ensure that they are aligned with the horizontal line of the sewing needle plate.

[0049] Once the material is in place, the control system starts the main shaft motor 51 of the sewing unit, and the needle begins to move up and down. The control system coordinates the speed of the winding machine, the unwinding machine and the sewing unit. The winding machine provides the main traction force to pull the material backward. When the material passes the needle, the pressure rollers 72 on the lifting frame 71 of the front and rear moving mechanisms work simultaneously to firmly fix the material before and after the needle on the same horizontal plane. At this time, the zipper teeth 3 pass under the pressure rollers 72. Since the pressure rollers 72 are rotatably connected and the electric push rod 7 has elastic buffer, the pressure rollers 72 will rise and fall slightly with the contour of the zipper teeth 3. This ensures sufficient clamping force to prevent the fabric layers from shifting and avoids rigid collisions that could cause needle breakage or damage to the zipper teeth 3. The sewing unit performs high-precision sewing on the edges of the upper and lower anti-pinch straps 21 to firmly fix the anti-pinch straps 21 to the zipper strap 2.

[0050] During the sewing process, if the control system detects a slight deviation in the zipper tape 2 through the sensor, the control system will fine-tune the left and right positions of the front and rear moving table 61 to correct the sewing trajectory in real time. Under the drive of the control system, the winding machine will neatly wind the sewn zipper tape 2 onto the take-up roll.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A self-locking anti-pinch zipper, comprising a zipper body (1), characterized in that: The zipper body (1) includes a zipper tape (2), a slide bar (23), zipper teeth (3), a zipper head (22), and a pull ring (24); The zipper strip (2) is fixed to one side of the slide bar (23) by a high-frequency hot pressing process, and the zipper tooth (3) is integrally formed with the other side of the slide bar (23) by an injection molding process.

2. The anti-pinch self-locking zipper according to claim 1, characterized in that: The upper and lower surfaces of the zipper tape (2) are both sewn with anti-pinch tape (21), the zipper head (22) is slidably connected to the outer side of the slide strip (23), and the pull ring (24) is movably sleeved on the connecting ring of the zipper head (22).

3. The anti-pinch self-locking zipper according to claim 2, characterized in that: The zipper tape (2) is made of polyester fiber, the anti-pinch tape (21) is made of nylon, the slide strip (23) is made of polyoxymethylene, and the zipper teeth (3), the zipper head (22) and the pull ring (24) are all made of zinc alloy.

4. The anti-pinch self-locking zipper according to claim 3, characterized in that: The outer end of the slide bar (23) is provided with an arc groove (4), and the inner end of the zipper head (22) is slidably inserted with a ball rod (41). The outer surface of the ball rod (41) is slidably engaged with the inner wall of the arc groove (4). A spring (42) is fixedly installed at one end of the ball rod (41). The spring (42) is fixedly installed on the bottom wall of the inner groove of the zipper head (22). The pre-compression of the spring (42) matches the fitting clearance between the ball rod (41) and the arc groove (4).

5. A method for manufacturing an anti-pinch self-locking zipper according to claim 4, using an anti-pinch self-locking zipper as described in any one of claims 1-4, characterized in that: Step 1: Using an injection molding machine, the zipper tooth (3) and the other side of the slide (23) are integrally formed by injection molding process. Then, a high-frequency hot press is used to fix the zipper strip (2) and one side of the slide (23) by high-frequency hot pressing welding. Step 2: Attach the anti-pinch tape (21) to the upper and lower sides of the zipper tape (2). The anti-pinch tape (21) below the zipper tape (2), that is, the anti-pinch tape (21) in contact with the inner garment, has an interlaced weave structure, while the anti-pinch tape (21) above the zipper tape (2) has a non-interlaced weave structure. After the bonding is completed, use an automatic sewing machine to sew the anti-pinch tape (21) to the zipper tape (2) to fix it. Step 3: Pre-assemble the ball stick (41), spring (42) and zipper head (22) to ensure that the ball stick (41) can slide smoothly in the groove of the zipper tooth (3) and the spring (42) can provide a stable pre-tightening force. Put the assembled zipper head (22) on the slide bar (23) so that the ball stick (41) on the inner end of the zipper head (22) is aligned and engaged with the arc groove (4) on the outer end of the slide bar (23) to form a sliding fit, thereby obtaining the zipper body (1).

6. A method for manufacturing an anti-pinch self-locking zipper according to claim 5, characterized in that: The automatic sewing machine in step two includes a frame (5) with sewing units. The upper surface of the frame (5) is provided with a moving mechanism. The moving mechanism includes a screw (6) and a moving table (61). The rotation of the screw (6) drives the moving table (61) to move. The upper surface of the frame (5) is provided with a pressing mechanism, which includes a pressure roller (72). The descent of the pressure roller (72) presses the zipper belt (2) and the anti-pinch belt (21).

7. A method for manufacturing an anti-pinch self-locking zipper according to claim 6, characterized in that: The moving mechanism also includes a motor (51), which is fixedly installed on the inner wall of the groove in the bottom plate of the frame (5). The output shaft of the motor (51) is rotatably connected to the groove in the bottom plate of the frame (5) through a bearing.

8. A method for manufacturing an anti-pinch self-locking zipper according to claim 7, characterized in that: The output shaft of the motor (51) is fixedly installed at one end of the screw (6). The screw (6) is rotatably connected to the inner wall of the groove of the base plate of the frame (5) through a bearing. The moving platform (61) is threadedly connected to the outer surface of the screw (6). The sliders at both ends of the moving platform (61) are slidably engaged with the guide rails of the base plate of the frame (5).

9. A method for manufacturing an anti-pinch self-locking zipper according to claim 6, characterized in that: The pressing mechanism also includes an electric push rod (7), which is fixedly installed on the upper surface of the moving platform (61). One end of the telescopic rod of the electric push rod (7) is fixedly installed with a lifting frame (71). The sliding rod of the lifting frame (71) is slidably inserted into the groove on the upper surface of the moving platform (61). The pressure roller (72) is rotatably connected to the inner wall of the lifting frame (71) through a bearing.

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