Folding magnetic back buckle and capacity expansion bag with folding magnetic back buckle

Abstract

The utility model relates to the field of luggage technology, propose the folding magnetic attraction back buckle for solving the problem of easy tooth drop of expansion zipper head and the expansion luggage with folding magnetic attraction back buckle, including by left box body and right box body split's luggage body, be provided with flexible connecting piece between left box body and right box body and located expansion zipper head -to -tail joint, flexible connecting piece two fixed ends are respectively fixedly arranged on left box body and right box body, the flexible connecting piece length between left box body and right box body is not longer than the expansion interval of expansion fabric layer, more than three single folding surface of the flexible connecting piece middle section form, the automatic folding structure that sets up on the folding surface is expanded or is folded and expands or contracts and stretches out or is adapted to the expansion fabric layer.

Description

Technical Field

[0001] This utility model relates to the field of luggage technology, and in particular to a folding magnetic back buckle and an expandable luggage with a folding magnetic back buckle. Background Technology

[0002] In the structural design of suitcases, to achieve flexible adjustment of the suitcase capacity, a zipper that closes at both ends is usually used as the expansion and closing component. When the suitcase needs to be expanded, the zipper is opened to increase the distance between the left and right sides of the suitcase, allowing the expansion fabric layer between the left and right sides to flatten, thereby expanding the internal storage space; when expansion is not needed, the expansion fabric layer is closed to shrink the expansion by closing the zipper, keeping the left and right sides of the suitcase in a compact state.

[0003] After the suitcase is expanded, the two halves are in a spaced-out state, and the zipper heads and side zipper straps are also taut. Because the zipper heads and side zipper straps are taut due to the tension of the items inside the suitcase, if subjected to external impact, the zipper heads and zipper teeth are prone to coming loose, affecting the normal use of the expanded suitcase function. Furthermore, the zipper's closure is unsightly, being directly exposed and affecting the overall aesthetics of the suitcase.

[0004] This case arose in order to resolve the aforementioned issues. Utility Model Content

[0005] Therefore, in view of the above problems, this utility model proposes a folding magnetic back buckle to solve the problem of easy tooth breakage of the expansion zipper head and an expansion bag with a folding magnetic back buckle.

[0006] To solve the above-mentioned technical problems, the solution adopted by this utility model is: a folding magnetic back buckle, characterized in that: it includes a flexible connecting piece, the middle section of which forms three or more odd-numbered folding surfaces, the folding surfaces are provided with an automatic folding structure that automatically adapts to the stretching or folding of the expansion fabric layer, and the two ends of the flexible connecting piece are provided with a fixing installation structure for detaching and fixing the flexible connecting piece to the outer box.

[0007] A further improvement is that the automatic folding structure includes several suction tabs, which are disposed on at least two folding surfaces and attract each other.

[0008] A further improvement is that the number of folded surfaces is three, five, or seven, and the suction tabs are provided at least on the folded surfaces at both ends.

[0009] A further improvement is that the two mutually attracting pieces are two magnetic pieces, or a magnetic piece and a magnetic metal piece.

[0010] A further improvement is that a fixing sealing layer is provided on the suction sheet, and the fixing sealing layer is sewn or glued to the folded surface.

[0011] A further improvement is made to the installation structure, which includes an upper pressure block and a lower pressure block. The lower surface of the upper pressure block has a downwardly protruding positioning post. The flexible connecting piece has a first positioning hole, and the lower pressure block has a third positioning hole. The positioning post passes through the first positioning hole and the third positioning hole in sequence and is then fixed to the lower pressure block.

[0012] A further improvement is that the lower pressure block is equipped with a locking device to prevent the positioning pin from disengaging.

[0013] A folding magnetic back clasp expandable bag includes a bag body composed of a left and a right compartment. An expandable fabric layer is fixedly connected between the left and right compartments. An expandable zipper is provided on the outside of the expandable fabric layer between the left and right compartments. The zipper straps on both sides of the expandable zipper are fixedly installed on the left and right compartments respectively. The bag is characterized by a flexible connecting piece at the junction of the expandable zipper and the left and right compartments. The two fixed ends of the flexible connecting piece are fixedly installed on the left and right compartments respectively. The length of the flexible connecting piece between the left and right compartments is not longer than the expandable spacing of the expandable fabric layer. The middle section of the flexible connecting piece forms three or more odd-numbered folding surfaces. The folding surfaces are provided with an automatic folding structure that automatically adapts to the expansion or contraction of the expandable fabric layer.

[0014] A further improvement is that the two fixed ends of the flexible connecting piece are respectively provided with fixed installation structures between them and the left and right housings.

[0015] A further improvement is made to the installation structure, which includes an upper pressure block and a lower pressure block. The lower surface of the upper pressure block has a downwardly protruding positioning post. The flexible connecting piece has a first positioning hole, the left and right housings have second positioning holes, and the lower pressure block has a third positioning hole. The positioning post passes through the first positioning hole, the second positioning hole, and the third positioning hole in sequence and is then fixed to the lower pressure block.

[0016] A further improvement is that the lower pressure block is equipped with a locking device to prevent the positioning pin from disengaging.

[0017] A further improvement is that the automatic folding structure includes several suction tabs, which are disposed on at least two folding surfaces and attract each other.

[0018] A further improvement is that the two mutually attracting pieces are two magnetic pieces, or a magnetic piece and a magnetic metal piece.

[0019] A further improvement is that a fixing sealing layer is provided on the suction sheet, and the fixing sealing layer is sewn or glued to the folded surface.

[0020] A further improvement is that the bag body is a wheeled trolley case or a hand-held case.

[0021] By adopting the aforementioned technical solution, the beneficial effects of this utility model are: 1. When the luggage expands, the flexible connecting piece limits the maximum width of the zipper end to both sides, keeping the zipper end in a natural, unstretched state. This effectively prevents the zipper head and teeth from coming loose due to external impacts or the tension of internal items, significantly reducing the probability of zipper damage, ensuring the normal use of the luggage expansion function, and extending the lifespan of the expansion zipper. At the same time, the flexible connecting piece covers the connection point of the expansion zipper, hiding the zipper head and the point where the zipper ends meet, providing physical protection for the zipper end and further reducing wear and impact from external factors.

[0022] 2. The flexible connecting piece automatically adapts to the expansion or contraction of the fabric layer, unfolding smoothly during expansion and folding itself when not expanded. The entire process is smooth and natural, enhancing structural reliability. When expanded, the flexible connecting piece conceals the previously exposed zipper's closure joints, hiding unsightly areas and creating a more harmonious and unified overall appearance. When not expanded, the flexible connecting piece folds and contracts automatically as the fabric layer is contracted, adhering closely to the zipper surface and preventing outward bulging. This keeps the bag's appearance flat and clean when not expanded, enhancing its overall aesthetics and sophistication.

[0023] 3. The flexible connecting piece is connected to the left and right boxes through a fixed installation structure. The positioning pins of the upper pressure block pass through the relevant positioning holes and are fixed to the lower pressure block. The locking fasteners then prevent the positioning pins from falling off. This connection method allows the flexible connecting piece to be fixed to the box body in a surface-fixed manner, which is firm and stable. It can ensure that the flexible connecting piece is not easy to loosen or fall off during the use of the bag, thus ensuring the stable performance of its function.

[0024] 4. The flexible selection of the number of folding surfaces allows the magnetic snap back in this case to adapt to different expansion gaps. It can be adjusted according to actual needs, with odd numbers of folding surfaces such as three, five, and seven to meet different storage capacity requirements. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the folding magnetic back buckle in an embodiment of this utility model.

[0026] Figure 2 This is an exploded view of the folding magnetic back buckle in an embodiment of this utility model.

[0027] Figure 3 This is a schematic diagram of the structure of the folded magnetic snap-fit ​​state in an embodiment of this utility model.

[0028] Figure 4 This is a structural schematic diagram of the unfolded state after folding and magnetic fastening in an embodiment of this utility model.

[0029] Figure 5 This is a schematic diagram of the magnetically attached state of the folded bag in an embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the unfolded state of the bag after being folded and magnetically attached in an embodiment of this utility model. Detailed Implementation

[0031] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0032] refer to Figures 1 to 6 This utility model discloses a specific embodiment of the application of a folding magnetic back buckle in an expandable luggage. An expandable luggage with a folding magnetic back buckle includes a luggage body composed of a left box 10 and a right box 11, wherein the luggage body is a wheeled trolley case or a carry-on case. An expansion fabric layer 12 is fixedly connected between the left box 10 and the right box 11. An expansion zipper 13 is provided on the outside of the expansion fabric layer 12 between the left box 10 and the right box 11. The zipper straps on both sides of the expansion zipper 13 are fixedly provided on the left box 10 and the right box 11 respectively. A flexible connecting piece 14 is provided at the junction of the expansion zipper 13 between the left box 10 and the right box 11. The two fixed ends of the flexible connecting piece 14 are fixedly provided on the left box 10 and the right box 11 respectively. The length of the flexible connecting piece 14 between the left box 10 and the right box 11 is not longer than the expansion spacing of the expansion fabric layer 12. The middle section of the flexible connecting piece 14 forms three or more odd-numbered folding surfaces 15. The folding surfaces 15 are provided with an automatic folding structure that automatically adapts to the expansion or retraction of the expansion fabric layer 12 to unfold or fold.

[0033] The automatic folding structure includes several suction tabs 16, which are disposed on at least two folding surfaces 15 and are mutually attracted. The suction tabs 16 are circular or rectangular strips; two mutually attracted suction tabs 16 are either two mutually attracted magnetic sheets, or a magnetic sheet and a magnetic metal sheet. The magnetic metal sheet can be an iron sheet. A fixing sealing layer 17 is provided over the suction tabs 16, and the fixing sealing layer 17 is sewn or glued to the folding surfaces 15. The number of folding surfaces 15 is three, five, or seven, and the suction tabs 16 are disposed on at least the first and last folding surfaces 15. The suction tabs 16 are arranged according to the number of folding surfaces; they can be arranged sequentially on each folding surface 15, spaced apart on each folding surface 15, or only on the first and last folding surfaces 15.

[0034] The flexible connecting piece 14 has fixed mounting structures at its two fixed ends, which are respectively connected to the left housing 10 and the right housing 11. Each mounting structure includes an upper pressure block 18 and a lower pressure block 19. The lower surface of the upper pressure block 18 has a downwardly protruding positioning post 20. The flexible connecting piece 14 has a first positioning hole 21, the left housing 10 and the right housing 11 have second positioning holes, and the lower pressure block 19 has a third positioning hole 22. The positioning post 20 passes through the first positioning hole 21, the second positioning hole, and the third positioning hole 22 in sequence and is then fixed to the lower pressure block 19. The lower pressure block 19 is detachably equipped with a locking device to prevent the positioning post 20 from detaching. The locking device is a bolt or screw, which spirally extends into the positioning post 20.

[0035] The working principle of the folding magnetic back buckle: The flexible connecting piece 14 is fixedly mounted on the left and right boxes 11 at the junction of the expansion zipper 13. When the bag is expanded, the flexible connecting piece 14 covers the junction of the expansion zipper 13, hiding the junction of the zipper and the zipper head, improving the overall aesthetics of the bag and protecting the end of the expansion zipper 13, thus helping the bag maintain its expansion function. At the same time, the flexible connecting piece 14 limits the maximum width of the zipper end to stretch to both sides, keeping the end of the expansion zipper 13 in a natural, unstretched state, which helps protect the expansion zipper 13. When the bag is not expanded, the expansion fabric layer 12 is confined inside by the expansion zipper 13, and the flexible connecting piece 14 also automatically folds and adheres to the surface of the expansion zipper 13 as the expansion fabric layer 12 is retracted, preventing the flexible connecting piece 14 from sticking out and improving the overall aesthetics of the bag when it is not expanded.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions above are only illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A folding magnetic back clasp, characterized in that: It includes a flexible connecting piece, the middle section of which forms three or more odd-numbered folding surfaces. The folding surfaces are provided with an automatic folding structure that automatically adapts to the stretching or shrinking of the expansion fabric layer and unfolds or folds. The two ends of the flexible connecting piece are provided with a fixing installation structure for detaching and fixing the flexible connecting piece to the outer box.

2. The folding magnetic back clasp according to claim 1, characterized in that: The automatic folding structure includes a plurality of suction tabs, which are disposed on at least two folding surfaces and are mutually attracted.

3. The folding magnetic back clasp according to claim 2, characterized in that: The number of folded surfaces is three, five, or seven, and the suction tabs are provided at least on the folded surfaces at the beginning and end.

4. The folding magnetic back clasp according to claim 2, characterized in that: The two mutually attracting pieces are two magnetic pieces, or a magnetic piece and a magnetic metal piece.

5. The folding magnetic back clasp according to claim 2, characterized in that: The absorbent sheet is covered with a fixing layer, which is sewn or glued to the folded surface.

6. The folding magnetic back clasp according to any one of claims 1-5, characterized in that: The installation structure includes an upper pressure block and a lower pressure block. The lower surface of the upper pressure block has a downward protruding positioning post. The flexible connecting piece has a first positioning hole, and the lower pressure block has a third positioning hole. The positioning post passes through the first positioning hole and the third positioning hole in sequence and is then fixed to the lower pressure block.

7. The folding magnetic back clasp according to claim 6, characterized in that: The lower pressure block is equipped with a locking device to prevent the positioning pin from disengaging.

8. A folding magnetic back clasp-equipped expandable bag, comprising a bag body composed of a left and a right compartment joined together, wherein an expandable fabric layer is fixedly connected between the left and right compartments, and an expandable zipper is provided on the outside of the expandable fabric layer between the left and right compartments, wherein zipper straps on both sides of the expandable zipper are respectively fixedly provided on the left and right compartments, characterized in that: A flexible connecting piece is provided between the left and right boxes at the junction of the expansion zipper. The two fixed ends of the flexible connecting piece are respectively fixed to the left and right boxes. The length of the flexible connecting piece between the left and right boxes is not longer than the expansion spacing of the expansion fabric layer. The middle section of the flexible connecting piece forms three or more odd-numbered folding surfaces. The folding surfaces are provided with an automatic folding structure that automatically adapts to the expansion of the expansion fabric layer and expands or folds.

9. The expandable bag with a folding magnetic back clasp according to claim 8, characterized in that: The flexible connecting piece is provided with a fixed installation structure between its two fixed ends and the left and right boxes, respectively.

10. The expandable bag with a folding magnetic back clasp according to claim 9, characterized in that: The installation structure includes an upper pressure block and a lower pressure block. The lower surface of the upper pressure block has a downward protruding positioning post. The flexible connecting piece has a first positioning hole. The left and right housings have second positioning holes. The lower pressure block has a third positioning hole. The positioning post passes through the first positioning hole, the second positioning hole, and the third positioning hole in sequence and is then fixed to the lower pressure block.

11. The expandable bag with a folding magnetic back clasp according to claim 10, characterized in that: The lower pressure block is equipped with a locking device to prevent the positioning pin from disengaging.

12. The expandable bag with a folding magnetic back clasp according to any one of claims 8-11, characterized in that: The automatic folding structure includes a plurality of suction tabs, which are disposed on at least two folding surfaces and are mutually attracted.

13. The expandable bag with a folding magnetic back clasp according to claim 12, characterized in that: The two mutually attracting pieces are two magnetic pieces, or a magnetic piece and a magnetic metal piece.

14. The expandable bag with a folding magnetic back clasp according to claim 12, characterized in that: The absorbent sheet is covered with a fixing layer, which is sewn or glued to the folded surface.

15. The expandable bag with a folding magnetic back clasp according to claim 8, characterized in that: The bag body is a wheeled trolley case or a hand-held case.

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