Combined zipper for width-variable draw-bar box

Abstract

The utility model relates to a width-variable combined zipper for a draw-bar box. The draw-bar box comprises two folding box shells of a soft cloth box shell or a hard shell draw-bar box and a main zipper used for opening and closing the two box shells, the main zipper comprises a main puller and two main single-side chain belts which are opened and closed by the main puller and are arranged on the left side and the right side, a main single-side chain belt is sewn around the opening edge of one box shell, and the main single-side chain belt is sewn around the opening edge of the other box shell. A main single-side chain belt is sewn beside the box shell widening cloth, an auxiliary zipper for widening the box shell or not is sewn beside the other main single-side chain belt, and the auxiliary zipper comprises an auxiliary puller and two auxiliary single-side chain belts which are opened and closed by the auxiliary puller and are arranged on the left side and the right side of the main single-side chain belt and is characterized in that the other main single-side chain belt, the auxiliary single-side chain belt beside the main single-side chain belt and one side edge of the box shell widening cloth are sewn together; and the other single-side chain belt of the auxiliary zipper and the other side edge of the box shell widening cloth are sewn around the opening edge of the other box shell. The main zipper and the auxiliary zipper of the structure are standard zippers, and zipper racks do not need to be sewn on the box shell widening cloth, so that convenience is brought to later tape ironing and warehouse management.

Description

Technical Field

[0001] The utility model relates to a zipper for a trolley case, in particular to a combined zipper for a trolley case with variable width. Background Art

[0002] In order to increase the volume of the trolley case, in addition to the main zipper for opening and closing the upper and lower case shells, many trolley cases also sew a circular transition ring wrapped with lining cloth and inner lining steel wire beside the main zipper of the case shell. The shape of the transition ring is the same as the shape of the mouth edge of the trolley case. A secondary zipper is sewn beside the transition ring, the outer side of the secondary zipper is sewn to the mouth edge of the other case shell, and a widening cloth is connected between the left and right chain tapes of the secondary zipper. When the trolley case needs to be widened, the secondary zipper is opened, and the widening cloth unfolds at the mouth edges of the two case shells. At this time, the total width (thickness) of the trolley case is the width of the upper and lower case shells plus the width of the widening cloth, and the volume of the trolley case increases accordingly. If the volume does not need to be increased, the secondary zipper is not opened, and the widening cloth is folded inside the trolley case without affecting the normal use of the trolley case. However, for the current trolley case with widening cloth, due to the existence of the transition ring, it brings many inconveniences to sewing the main and secondary zippers of the trolley case, and the sewing efficiency is also very low, increasing the manufacturing cost. For the composite zipper structure of a width-adjustable trolley case in the patent ZL201921597841.X, although the circular transition ring wrapped with lining cloth and inner lining steel wire is cancelled, greatly simplifying the structure and sewing process, chain teeth need to be sewn on one side of the main zipper on the widening cloth of the case shell, which brings difficulties to the later ironing and leveling of the zipper. For enterprises specializing in producing zippers or trolley cases, it increases the variety, bringing trouble to both production and management. Content of the Utility Model

[0003] The purpose of the utility model is to provide a combined zipper for a trolley case with variable width, which has a simple structure and is convenient for sewing and use.

[0004] For meeting the above requirements, the composite zipper structure of the width-variable trolley case of the utility model: it includes two pairs of mating case shells of a soft cloth case shell or a hard shell trolley case, and a main zipper for opening and closing the two case shells. The main zipper includes a main pull head and two main single-sided chain tapes on the left and right sides opened and closed by the main pull head. One main single-sided chain tape is sewn around the mouth edge of one case shell, and a secondary zipper for whether to widen the case shell is sewn beside the other main single-sided chain tape. The secondary zipper includes a secondary pull head and two secondary single-sided chain tapes on the left and right sides opened and closed by the secondary pull head. Its characteristic is that the other main single-sided chain tape is sewn together with one secondary single-sided chain tape beside it and one side edge of the widening cloth of the case shell, and the other secondary single-sided chain tape of the secondary zipper and the other side edge of the widening cloth of the case shell are sewn around the mouth edge of the other case shell.

[0005] The main zipper is a double-layer zipper with normal or reverse threading.

[0006] The double-layer zipper mentioned above has the same tooth size for the upper and lower layers or the teeth of the upper-layer zipper are larger than those of the lower-layer zipper.

[0007] The main zipper mentioned above is a single-layer zipper that can be inserted forward or backward.

[0008] A waterproof film is made on the upper surface of the tape of the main zipper and / or the secondary zipper.

[0009] The secondary pull head is inserted forward or backward on the two secondary single-sided tapes on the left and right sides.

[0010] The box shell widening cloth is waterproof cloth.

[0011] According to the combined zipper for a variable-width trolley case mentioned above, since the variable-width telescopic structure of the entire trolley case only has independent main and secondary zippers and the box shell widening cloth, all the main and secondary zippers can adopt standard zippers, and there is no need to sew zipper teeth on the box shell widening cloth, which also brings convenience to the later ironing tape, greatly simplifies the structure and sewing process, and also brings convenience to the enterprise's warehousing management. Description of the Drawings

[0012] Figure 1 is the front view of the variable-width trolley case when the main zipper and the secondary zipper are both zipped up, where the main zipper is a double-layer zipper with the same tooth size for the upper and lower layers and is inserted forward, and the secondary zipper is inserted forward, in the non-widened state;

[0013] Figure 2 is Figure 1 the front view of the variable-width trolley case in item

[0014] Figure 3 is Figure 1 the enlarged view of the A-A cross-section in item

[0015] Figure 4 is Figure 2 the enlarged view of the B-B cross-section in item

[0016] Figure 5 is the cross-sectional view of the double-layer main zipper with the same tooth size for the upper and lower layers and inserted forward;

[0017] Figure 6 is the cross-sectional view of the double-layer main zipper with the teeth of the upper-layer zipper larger than those of the lower-layer zipper and inserted forward;

[0018] Figure 7 is the cross-sectional view of the double-layer main zipper with the teeth of the upper-layer zipper larger than those of the lower-layer zipper and inserted backward;

[0019] Figure 8 is the cross-sectional view of the single-layer main zipper inserted forward;

[0020] Figure 9It is a sectional view of the main zipper worn inside out;

[0021] Figure 10 It is the front view of the variable-width luggage case when both the main zipper and the secondary zipper are zipped up, with the secondary puller worn inside out and in the non-width-increased state;

[0022] Figure 11 It is Figure 10 The enlarged view of the C-C section in

[0023] In the figure: 1. Left case shell; 2. Right case shell; 3. Main zipper; 4. Main puller; 5. Left main single-sided chain belt; 6. Right main single-sided chain belt; 7. Secondary zipper; 8. Secondary puller; 9. Left secondary single-sided chain belt; 10. Right secondary single-sided chain belt; 11. Case shell width-increasing cloth; 12. Waterproof film. Detailed implementation mode

[0024] The following further describes the present utility model in conjunction with the attached drawings and specific embodiments.

[0025] Figures 1 to 4 It is a schematic diagram of a combined zipper for a variable-width luggage case. As can be seen from the figure, it includes two pairs of mating left case shell 1 and right case shell 2 of a soft cloth or hard shell luggage case, and a main zipper 3 for opening and closing the left case shell 1 and the right case shell 2. The main zipper 3 is a double-layer zipper. The main zipper 3 includes a main puller 4 and left main single-sided chain belt 5 and right main single-sided chain belt 6 opened and closed by the main puller 4 on the left and right sides. The right main single-sided chain belt 6 is sewn around the edge of the right case shell 2. The double-layer zipper of the main zipper 3 has the same chain tooth size for the upper and lower layers as Figure 5 shown, or the chain teeth of the upper-layer zipper can be larger than those of the lower-layer zipper as Figure 6 shown, where the chain teeth of the upper-layer zipper are larger than those of the lower-layer zipper, and their main puller 4 is worn normally as Figure 6 shown, or it can be a zipper worn inside out as Figure 7 shown. The main zipper 3 can also be a single-layer zipper, and their main puller 4 is worn normally as Figure 8 shown, or a zipper worn inside out as Figure 9 shown. A secondary zipper 7 for whether to increase the width of the case shell is sewn beside the left main single-sided chain belt 5. The secondary zipper 7 includes a secondary puller 8 and left secondary single-sided chain belt 9 and right secondary single-sided chain belt 10 opened and closed by the secondary puller 8. The left main single-sided chain belt 5 is sewn together with the right secondary single-sided chain belt 10 beside it and the right side of the case shell width-increasing cloth 11. The left secondary single-sided chain belt 9 of the secondary zipper 7 and the left side of the case shell width-increasing cloth 11 are sewn around the edge of the left case shell 1. The secondary puller 8 is worn normally on the left secondary single-sided chain belt 9 and the right secondary single-sided chain belt 10, or the secondary puller 8 can be worn inside out on the left secondary single-sided chain belt 9 and the right secondary single-sided chain belt 10, as Figure 10 , Figure 11As shown. A waterproof film 12 is made on the upper surface of the chain belts of the main zipper and the secondary zipper. The widened cloth 11 of the box shell can also use waterproof cloth.

[0026] The examples given above are only the preferred embodiments of the present invention, but do not limit the scope of implementation of the present invention. Any equivalent changes or modifications made within the scope of this application should still fall within the patent scope covered by the present invention.

Claims

1. A combined zipper for a width-variable trolley case, comprising two pairs of soft fabric trolley cases or hard shell trolley cases, and a main zipper for opening and closing the two trolley cases, wherein the main zipper comprises a main slider and two main single-sided chain belts on the left and right sides opened and closed by the main slider, a main single-sided chain belt is sewn around the edge of one trolley case, and a secondary zipper for widening the trolley case is sewn next to the other main single-sided chain belt, wherein the secondary zipper comprises a secondary slider and two secondary single-sided chain belts on the left and right sides opened and closed by the secondary slider, and ... The other main single-sided chain belt is sewn together with a pair of single-sided chain belts and one side of the box shell widening cloth next to it, and the other pair of single-sided chain belts of the auxiliary zipper and the other side of the box shell widening cloth are sewn around the edge of the other box shell.

2. The combined zipper for a variable width suitcase according to claim 1, characterized in that The main zipper is a double-layer zipper that can be worn forward or backward.

3. The combined zipper for a variable width suitcase according to claim 2, characterized in that The double-layer zipper has sprocket teeth of the upper and lower layers that are the same in size, or the sprocket teeth of the upper zipper are larger than the sprocket teeth of the lower zipper.

4. The combined zipper for a variable width suitcase according to claim 1, characterized in that The main zipper is a single-layer zipper that can be worn forward or backward.

5. The combined zipper for a variable-width suitcase according to claim 1, characterized in that The upper surface of the chain belt of the main zipper and / or the auxiliary zipper is provided with a waterproof film.

6. The combined zipper for a variable width suitcase according to claim 1, characterized in that The auxiliary pull head is threaded forwardly or reversely on the two auxiliary single-sided chain belts on the left and right sides.

7. The combined zipper for a variable width suitcase according to claim 1, characterized in that The box shell widening cloth is a waterproof cloth.

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