A luggage zipper assembly structure
By setting a lint-collecting groove and a decorative groove on the hard rubber extrusion frame, and inserting a soft rubber strip into the decorative groove, the problem of wear on the case shell caused by the protrusions and lint formed by the sewing needle is solved, thereby improving the service life and aesthetics of the case.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG TAIMEI IND CO LTD
- Filing Date
- 2025-10-17
- Publication Date
- 2026-07-24
AI Technical Summary
In the prior art, after the sewing needle passes through the rigid extrusion frame, it forms protrusions and burrs on both the inner and outer sides of the rigid extrusion frame, which leads to wear and tear on the housing, and cracks and loosening at the sewing position.
The hard plastic extrusion frame is provided with a lint trap and a decorative groove on both the inner and outer sides corresponding to the stitch line. A soft plastic strip is inserted into the decorative groove. The protrusions and lint formed by the sewing needle during the needle insertion and exit process are collected in the groove. The soft plastic strip covers the protrusions and lint to prevent direct contact with the box shell.
It reduces the wear and tear on the case shell caused by the protrusion and lint when the sewing needle is threaded, thus improving the service life and appearance of the case and preventing loosening and wear at the sewing positions.
Smart Images
Figure CN224539641U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection-molded luggage technology, specifically to a luggage zipper assembly structure. Background Technology
[0002] Injection-molded bags are a type of bag product manufactured using the injection molding process. Its core characteristic is that molten plastic raw material is injected into a mold, and after cooling and solidification, a one-piece shell structure is formed. This process was first applied in the industrial field and has gradually become more widespread in the consumer market in recent years, especially in areas such as suitcases and tool cases.
[0003] For example, the invention patent with publication number CN120501288A discloses a soft and hard composite extruded frame for bags. The first gap at the soft and hard joint of the extruded frame is inserted into the port of the bag shell, and the main zipper is placed in the second gap of the hard plastic extruded frame. The sewing machine is brought into contact with the extruded frame and sewed along the extension direction of the extruded frame. This extruded frame adopts a soft and hard co-extrusion technology of two materials. The hard extruded frame can facilitate automatic or semi-automatic sewing process, and can also reinforce, support, shape and protect the bag shell. The hard plastic extruded frame covers the lower edge of the bag and the main zipper, which can protect the bag and the zipper, and also has a good feel and prevents the frame edge from flying or sharp scratches to the hands.
[0004] However, in the actual processing, the hard plastic extrusion frame, main zipper, hard extrusion frame and box shell are sewn and fixed by the sewing needle. After the sewing needle passes through the hard extrusion frame, it will form protrusions and burrs on both the inner and outer sides of the hard extrusion frame. The protrusions and burrs will cause the box shell to wear and break, and then cracks will appear at the sewing position, causing the sewing to loosen and come apart. Summary of the Invention
[0005] Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a zipper assembly structure for bags and luggage, which solves the problems mentioned in the background section.
[0006] Technical solution To achieve the above objectives, this utility model provides the following technical solution: A zipper assembly structure for a bag includes a bag shell, a main zipper, a hard rubber extrusion frame, and a soft rubber extrusion frame. A first open gap is formed between the soft rubber extrusion frame and the lower hard rubber extrusion frame. The two side ends of the bag shell are inserted into the first gap. A second gap is formed on one side of the two soft rubber extrusion frames facing each other. The two sides of the main zipper are inserted into the second gap. A plurality of stitches are sewn between the bag shell, the main zipper, the hard rubber extrusion frame, and the soft rubber extrusion frame. A lint trap is provided on the side of the hard rubber extrusion frame facing the bag shell, and the stitches pass directly through the lint trap.
[0007] Preferably, an inner lining is also inserted into the first gap, the inner lining being disposed on the inner side of the housing and attached to the outer side of the rigid rubber extrusion frame.
[0008] Preferably, a decorative groove is provided on the inner side of the hard rubber extrusion frame opposite to the chip-collecting groove, and a soft rubber strip is inserted into the decorative groove in a concave-convex fit, and the soft rubber strip is glued and fixed to the inner wall of the decorative groove.
[0009] Preferably, the inner side of the soft rubber strip is provided with a displacement groove.
[0010] Preferably, the outer side of the hard rubber extrusion frame is integrally formed with a positioning protrusion, and a positioning groove is formed between the positioning protrusion and the outer wall of the hard rubber extrusion frame. The inner side of the soft rubber extrusion frame is inserted into the positioning groove with a concave-convex fit. The two side ports of the housing are inserted and abut against the positions of the positioning protrusions of the soft rubber extrusion frame. Beneficial effects
[0011] This utility model provides a zipper assembly structure for bags and luggage. It has the following beneficial effects: This invention provides a lint-collecting groove and a decorative groove on both the inner and outer sides of the hard rubber extrusion frame corresponding to the stitch line. This allows the extrusion protrusions and lint formed during the needle insertion and exit of the hard rubber extrusion frame to be contained within the grooves, preventing the protrusions and lint from directly contacting the case shell. Soft rubber strips are then placed in the decorative grooves to cover the protrusions and lint, serving a decorative purpose while preventing the protrusions and lint from causing wear or tear on the bags and clothing.
[0012] In this invention, the thickness of the needle in the hard plastic extrusion frame can be reduced by setting a decorative groove, which can reduce the protrusions and lint formed by needle extrusion. The soft plastic strip is glued to the decorative groove and pulls on the decorative groove, preventing the hard plastic extrusion frame from deforming at the decorative groove position under pressure. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the assembly structure of a zipper for a bag according to the present invention.
[0014] In the picture: 1. Box shell; 2. Main zipper; 3. Hard rubber extrusion frame; 4. Soft rubber extrusion frame; 5. Inner lining; 6. Positioning protrusion; 7. Stitching line; 8. Debris concealment groove; 9. Decorative groove; 10. Soft rubber strip. Detailed Implementation
[0015] 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.
[0016] This utility model embodiment provides a zipper assembly structure for bags, such as... Figure 1As shown, the device includes a case shell 1, a main zipper 2, a hard rubber extrusion frame 3, and a soft rubber extrusion frame 4. The outer side of the hard rubber extrusion frame 3 is integrally formed with a positioning protrusion 6, which forms a positioning groove with the outer wall of the hard rubber extrusion frame 3. The inner side of the soft rubber extrusion frame 4 is inserted into the positioning groove with a concave-convex fit. The hard rubber extrusion frame 3 and the soft rubber extrusion frame 4 are integrally formed by co-extrusion process. An open first gap is opened between the soft rubber extrusion frame 4 and the lower hard rubber extrusion frame 3. The height of the positioning protrusion 6 is higher than the first gap. An inner lining layer 5 is provided on the inner side of the case shell 1. The two side ports of the case shell 1 and the inner lining layer 5 are inserted into the first gap and abut against the positions of the positioning protrusion 6 on the soft rubber extrusion frame 4. The positioning protrusion 6 blocks the ports of the case shell 1 and the inner lining layer 5, and plays a positioning role, which facilitates the assembly of the case shell 1 and the inner lining layer 5.
[0017] The soft rubber extrusion frames 4 on both sides have a second slit facing one side. The two sides of the main zipper 2 are inserted into the second slit. Several stitch lines 7 are sewn between the box shell 1, the main zipper 2, the hard rubber extrusion frame 3, and the soft rubber extrusion frame 4. The side of the hard rubber extrusion frame 3 facing the box shell 1 is provided with a chip-collecting groove 8. The inner side of the hard rubber extrusion frame 3 opposite to the chip-collecting groove 8 is provided with a decorative groove 9. The stitch lines 7 pass through the chip-collecting groove 8 and the decorative groove 9. The chip-collecting groove 8 and the decorative groove 9 can reduce the deformation of the sewing needle during the sewing process. The thickness minimizes protrusions and lint caused by compression deformation. These protrusions and lint are located in the lint-concealing groove 8 and the decorative groove 9. A soft rubber strip 10 is inserted into the decorative groove 9, and the strip is glued to the inner wall of the groove. The protrusions and lint on the outer side do not directly contact the outer shell 1 and the inner lining 5, thus preventing wear and tear on the shell 1 and the inner lining 5. This avoids cracks at the seams, preventing seam opening and loosening, and extends the lifespan of the main zipper 2 on the bag.
[0018] Furthermore, the inner side of the soft rubber strip 10 is provided with a displacement groove, which can be installed after the protrusions and lint are formed in the decorative groove 9 after sewing, so as to avoid the protrusions and lint from getting stuck in the soft rubber strip 10 and facilitate the assembly of the soft rubber strip 10.
[0019] Working principle: In the assembly process of this utility model, the hard rubber extrusion frame 3 and the soft rubber extrusion frame 4 are co-extruded and fixed. The ends of the box shell 1 and the inner lining layer 5 are aligned and directly inserted into the first gap until they are inserted to the position where they meet the obstruction formed by the positioning protrusion 6, which is the assembly position, improving the uniformity of assembly. Then, the two sides of the main zipper 2 are inserted into the second gap, and the box shell 1, the inner lining layer 5, the main zipper 2, the hard rubber extrusion frame 3 and the soft rubber extrusion frame 4 are sewn together by a sewing machine. During the process of the sewing machine needle entering and exiting the hard rubber extrusion frame 3, the process is as follows: The protrusions and lint caused by the extrusion are formed in the lint-concealing groove 8 and the decorative groove 9. The protrusions and lint in the lint-concealing groove 8 will not directly contact the outer shell 1 and the inner lining layer 5, which can avoid the wear and tear caused by the protrusions and lint to the outer shell 1 and the inner lining layer 5. This allows the outer shell 1 and the inner lining layer 5 to be firmly sewn and fixed on the hard rubber extrusion frame 3 without loosening, thus improving the service life of the bag. The protrusions and lint in the decorative groove 9, under the sealing and decoration of the soft rubber strip 10, will not cause wear and tear to the clothes inside the bag, thus improving the appearance and quality of the bag.
[0020] In addition, the chip-concealing groove 8 and decorative groove 9 can reduce the thickness of the seam of the hard plastic extrusion frame 3, that is, reduce the amount of extrusion protrusion inside and outside the pinhole, reduce the formation of protrusions and lint, and reduce the impact of protrusions and lint on the housing 1 and the inner lining layer 5.
[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A zipper assembly structure for bags and suitcases, comprising a case shell, a main zipper, a hard rubber extrusion frame, and a soft rubber extrusion frame, characterized in that: An open first gap is formed between the soft rubber extrusion frame and the lower hard rubber extrusion frame. The two side ports of the box shell are inserted into the first gap. The two sides of the soft rubber extrusion frames are formed with a second gap facing each other. The two sides of the main zipper are inserted into the second gap. Several stitch lines are sewn between the box shell, the main zipper, the hard rubber extrusion frame and the soft rubber extrusion frame. The side of the hard rubber extrusion frame facing the box shell is provided with a chip-collecting groove. The stitch lines pass through the chip-collecting groove.
2. The zipper assembly structure for bags according to claim 1, characterized in that: An inner lining is also inserted into the first gap. The inner lining is located on the inner side of the housing and is attached to the outer side of the hard plastic extrusion frame.
3. The zipper assembly structure for bags according to claim 2, characterized in that: A decorative groove is provided on the inner side of the hard rubber extrusion frame opposite the chip-collecting groove, and a soft rubber strip is inserted into the decorative groove in a concave-convex fit.
4. The zipper assembly structure for bags according to claim 3, characterized in that: The inner side of the soft rubber strip is fitted with a displacement groove.
5. The zipper assembly structure for bags according to claim 4, characterized in that: The outer side of the hard rubber extrusion frame is integrally formed with a positioning protrusion, and a positioning groove is formed between the positioning protrusion and the outer wall of the hard rubber extrusion frame. The inner side of the soft rubber extrusion frame is inserted into the positioning groove with a concave-convex fit. The two side ports of the housing are inserted and abut against the corresponding positioning protrusions of the soft rubber extrusion frame.