TWM662374U - Front-opening luggage compartment structure - Google Patents

Abstract

The structure of the open luggage case before the invention includes a case shell, a support frame, an outer cover and a zipper. The case shell has a first annular flange and an opening formed by the first annular flange, the first annular flange has a connected locking section and a coupling section, the support frame has a first abutting wall fixed to the coupling section, an annular convex rib and an locking groove mutually locked with the locking section. The outer cover is arranged outside the case shell and corresponds to the opening, and the outer cover has a second annular flange. The zipper has two interlocking chain plates, and the two chain plates are respectively arranged on the annular convex rib of the support frame and the second annular flange of the outer cover. When the outer cover is pressed, the second annular convex edge of the outer cover abuts against the annular convex rib of the supporting frame. In this way, the open luggage case structure of the invention can prevent the outer cover from sinking into the opening of the case, and is conducive to installing and replacing the zipper.

Description

Front-opening luggage compartment structure

This invention is related to front-opening luggage, and in particular to a front-opening luggage structure that can prevent the outer cover from sinking into the opening of the case and facilitates the installation and replacement of zippers.

The commonly used front-opening suitcase has a case and an outer cover. The case has a first shell and a second shell connected to each other. The first shell has a first annular flange and an opening formed by the first annular flange. The outer cover is arranged outside the case and corresponds to the opening of the first shell, and the outer cover has a second annular flange.

When manufacturing a common front-opening suitcase, a thermoplastic plastic is molded to form an integral first shell and outer cover, and a cutter is used to cut the junction between the first shell and the outer cover, so that the first shell and the outer cover are separated from each other and the first shell forms the aforementioned opening. Since the cutter cuts off part of the material around the outer cover, the size of the outer cover is always smaller than the size of the opening of the first shell. Therefore, after the outer cover and the suitcase are assembled, when the outer cover is pressed by an external force, the outer cover is easy to sink into the opening of the first shell.

Moreover, the commonly used front-opening suitcase also has a zipper for combining the case and the outer cover. One side of the zipper is sewn and fixed to the first annular flange of the first case, and the other side of the zipper is sewn and fixed to the second annular flange of the outer cover. The two sides of the zipper must be completely aligned to combine the case and the outer cover. However, due to the large size of the first case, it is quite inconvenient to sew the zipper, and it is not easy to disassemble and replace the zipper when it is damaged. Therefore, how to provide a front-opening suitcase that can prevent the outer cover from sinking into the opening of the case and facilitate the installation and replacement of the zipper is a problem that the industry needs to overcome urgently.

In view of the above shortcomings, the main purpose of this invention is to provide a front-opening suitcase that can prevent the outer cover from sinking into the opening of the case and facilitate the installation and replacement of the zipper.

In order to achieve the above main purpose, the present invention provides an open luggage case structure including a case, a support frame, an outer cover and a zipper. The case has a first side wall, a first annular flange extending inwardly from the first side wall, and an opening formed by the first annular flange. The first annular flange has an embedded segment and a connecting segment connected to the embedded segment. The opening connects the inside and outside of the case. The support frame has a first abutting wall, an annular rib protruding from the first abutting wall, and an embedded groove. The embedded groove and the embedded segment of the first annular flange are mutually embedded. The first abutting wall is detachably fixed to the connecting segment of the first annular flange. The outer cover is arranged outside the box shell and corresponds to the opening, and the outer cover has a second annular flange. The zipper has a first chain plate and a second chain plate that are engaged with each other, the first chain plate is fixed to the annular rib of the support frame, and the second chain plate is fixed to the second annular flange of the outer cover.

With the above technical features, when the outer cover provided by the open suitcase structure before this invention is pressed by an external force, the second annular flange of the outer cover abuts against the annular rib of the support member, so that the outer cover is not easy to sink into the opening of the case. In addition, the first chain of the zipper provided by the open suitcase structure before this invention is fixed to the support frame, so that the first chain and the support frame can be installed to the case together, or the first chain and the support frame can be removed from the case together and replaced with a new first chain. Such a special structural design makes the zipper easy to install and replace.

Preferably, the support frame further has a second abutment wall opposite to the first abutment wall, the first and second abutment walls form the embedded slot, and the embedded segment of the first annular flange abuts against the first and second abutment walls. In this way, the first and second abutment walls of the support frame help the embedded segment of the first annular flange to be tightly embedded in the embedded slot of the support frame.

Preferably, the embedding section of the first annular flange has a horizontal section extending horizontally away from the opening, a first segment vertically connected to the horizontal section, and a second segment arc-shapedly connected to the first segment; the first segment abuts against the first abutting wall of the support frame, and the second segment abuts against the second abutting wall of the support frame. In this way, the embedding section of the first annular flange can be tightly embedded in the embedding groove of the support frame.

Preferably, the support frame also has a connecting wall connecting the first and second abutting walls; the engaging segment of the first annular flange also has a third segment connected to the second segment, and the third segment abuts against the first abutting wall and the connecting wall of the support frame. In this way, the engaging segment of the first annular flange can be tightly engaged in the engaging groove of the support frame.

Preferably, the embedding section of the first annular flange has a horizontal section extending horizontally away from the opening, a straight section connected to the horizontal section, and a convex structure protruding from the straight section away from the opening, the convex structure abuts against the first abutting wall of the support frame, and the straight section abuts against the second abutting wall of the support frame. In this way, the embedding section of the first annular flange can be tightly embedded in the embedding groove of the support frame.

Preferably, the convex structure of the embedded segment is a convex point, a convex rib or a convex block. In this way, the convex structure can be manufactured in different styles according to the manufacturer's requirements.

Preferably, the first annular flange also has a plurality of first holes passing through it; the first abutting wall of the support frame also has a plurality of second holes passing through it; the front-opening luggage case structure further includes a plurality of fixing members, each of which is fixed through the first and second holes. In this way, the first abutting wall of the support frame can be tightly fixed to the coupling section of the first annular flange.

Preferably, the coupling section of the first annular flange also has a plurality of recessed positioning grooves, each of which is connected to one of the first holes; the first abutting wall of the support frame also has a plurality of protruding positioning blocks, each of which is penetrated by one of the second holes, and each of which is accommodated in one of the positioning grooves. In this way, the first abutting wall of the support frame is positioned at the coupling section of the first annular flange.

Preferably, the first chain plate has a first chain tooth portion and a first fixing portion, the first chain tooth portion is fixed to the first fixing portion, and the first fixing portion is fixed to the annular convex rib of the support frame; the second chain plate has a second chain tooth portion and a second fixing portion, the second chain tooth portion is fixed to the second fixing portion and engaged with the first chain tooth portion, and the second fixing portion is fixed to the second annular flange of the outer cover. In this way, when the first and second chain plates are damaged, the damaged first and second chain plates can be removed from the annular convex rib and the second annular flange respectively and replaced with new first and second chain plates.

Preferably, the open luggage structure of the invention further includes a first rubber sleeve and a second rubber sleeve, the first rubber sleeve is sleeved on the annular rib of the support frame, and the first fixing portion of the first chain is indirectly fixed to the annular rib of the support frame through the first rubber sleeve; the second rubber sleeve is sleeved on the second annular flange of the outer cover, and the second fixing portion of the second chain is indirectly fixed to the second annular flange of the outer cover through the second rubber sleeve. In this way, when the first and second chains are damaged, the damaged first and second chains can be removed from the first and second rubber sleeves respectively and replaced with new first and second chains.

The detailed structure, features, assembly or use of the open luggage structure provided by this invention will be described in the detailed description of the implementation method in the following. However, those with ordinary knowledge in this field should understand that such detailed descriptions and specific embodiments listed for implementing this invention are only used to illustrate this invention and are not used to limit the scope of the patent application of this invention.

First of all, it should be noted that the technical features provided by this invention are not limited to the specific structure, use and application described in the implementation method. The terms used in the description are all exemplary descriptive terms that can be understood by ordinary knowledgeable people in the relevant technical fields. The directional descriptive terms such as "front, top, bottom, back, left, right, top, bottom, inside, and outside" mentioned in this manual are only exemplary descriptive terms based on the normal use direction, and are not intended to limit the scope of the claims.

Please refer to Figures 1 and 2. The open suitcase structure 1 of the first embodiment of the present invention includes a case 10, a support frame 30, an outer cover 50 and a zipper 70.

Please continue to refer to Figures 2 to 4. The box 10 includes a first shell 11, which has a first annular wall 12, a first side wall 13 surrounding and connected to the first annular wall 12, a first annular flange 14 extending inwardly from the first side wall 13, and an opening 23 formed by the first annular flange 14. Among them, the first annular flange 14 of the first shell 11 has an embedding segment 15 and a coupling segment 20 connected to the embedding segment 15. As shown in Figures 3, 5 and 6, the embedding segment 15 is located at the top edge, left edge and right edge of the first annular flange 14. The embedding segment 15 has a horizontal segment 16 extending horizontally in a direction away from the opening 23, a first segment 17 vertically connected to the horizontal segment 16, a second segment 18 arc-shaped connected to the first segment 17, and a third segment 19 connected to the second segment 18. The coupling section 20 is located at the bottom side edge of the first annular flange 14, and the coupling section 20 has a plurality of inwardly recessed positioning grooves 21 (three in this embodiment, but not limited to three in practice), each positioning groove 21 is spaced apart from each other and connected to a first hole 22.

As shown in FIG. 2 , the case 10 further includes a second shell 24, which is connected to the first shell 11, and the second shell 24 has a second annular wall 25 opposite to the first annular wall 12, and a second side wall 26 surrounding and connected to the second annular wall 25, wherein the first annular wall 12, the first side wall 13, the second annular wall 25 and the second side wall 26 together form a accommodating space 27 for accommodating luggage, and the opening 23 of the first shell 11 connects the accommodating space 27 inside the case 10 with the outside of the case 10. In addition, the second shell 24 is also provided with a retractable pull rod 28, and the bottom of the box shell 10 is also provided with four casters 29, and the four casters 29 jointly support the box shell 10.

As shown in Figures 5, 7 and 8, the support frame 30 has a first annular abutment wall 31, a second abutment wall 34 arranged parallel to the first abutment wall 31, a connecting wall 35 connecting the first and second abutment walls 31, 34, and an insertion groove 36 formed by the first and second abutment walls 31, 34 and the connecting wall 35. The bottom edge of the inner side of the first abutment wall 31 also has a plurality of positioning blocks 32 (three in this embodiment, but not limited to three in practice) recessed outward, each positioning block 32 is arranged at intervals and penetrated by a second hole 33. The support frame 30 also has an annular rib 37 protruding outward from the outer side of the first abutment wall 31, and the annular rib 37 is sleeved with a first rubber sleeve 40.

During assembly, as shown in FIG. 5 , the support frame 30 is interlocked with the interlocking section 15 of the first annular flange 14 of the first shell 11 through the interlocking groove 36, so that the first section 17 of the interlocking section 15 abuts against the first abutting wall 31 of the support frame 30, and the second section 18 of the interlocking section 15 abuts against the second abutting wall 34 of the support frame 30, and the third section 19 of the interlocking section 15 abuts against the first abutting wall 31 and the connecting wall 35 of the support frame 30, thereby, the interlocking section 15 of the first annular flange 14 is tightly interlocked in the interlocking groove 36 of the support frame 30. On the other hand, the support frame 30 abuts against the coupling section 20 of the first annular flange 14 with the first abutting wall 31. At this time, each positioning block 32 of the first abutting wall 31 is accommodated in a positioning groove 21 of the coupling section 20, so that the first abutting wall 31 of the support frame 30 is positioned at the coupling section 20 of the first annular flange 14, and a plurality of fixing members S (such as screws) are respectively penetrated and fixed in the first and second holes 22 and 33, so that the first abutting wall 31 of the support frame 30 is tightly fixed to the coupling section 20 of the first annular flange 14. However, the fixing method between the first abutting wall 31 and the connecting section 20 is not limited to this embodiment, and can also be achieved by bonding, nailing or other suitable methods. However, this embodiment adopts the method of fixing the fixing member S through the first abutting wall 31 and the connecting section 20, so that the first abutting wall 31 and the connecting section 20 can be tightly combined with each other, and the first abutting wall 31 can be easily removed from the connecting section 20.

As shown in FIG. 2 and FIG. 5 , the outer cover 50 has a cover plate 51 and a second annular flange 52 surrounding and connected to the cover plate 51, and the second annular flange 52 is sleeved with a second rubber sleeve 60. The outer cover 50 is disposed outside the box shell 10 and corresponds to the opening 23 of the first shell 11.

As shown in Fig. 2, Fig. 5 and Fig. 6, the zipper 70 includes a first chain plate 71, a second chain plate 74 and two zipper heads 77. The first chain plate 71 has a first chain tooth portion 72 and a first fixing portion 73, the first chain tooth portion 72 is fixed to the first fixing portion 73, and the first fixing portion 73 is fixed to the annular rib 37 of the supporting frame 30 together with the first rubber sleeve 40 by sewing, that is, the first fixing portion 73 is indirectly fixed to the annular rib 37 of the supporting frame 30 through the first rubber sleeve 40. The second chain plate 74 has a second chain tooth portion 75 and a second fixing portion 76. The second chain tooth portion 75 is fixed to the second fixing portion 76 and engages or separates with the first chain tooth portion 72 through two zipper heads 77. The second fixing portion 76 is fixed to the second annular flange 52 of the outer cover 50 together with the second rubber sleeve 60 by sewing, that is, the second fixing portion 76 is indirectly fixed to the second annular flange 52 of the outer cover 50 through the second rubber sleeve 60.

Please continue to refer to FIG. 5 and FIG. 6. When the zipper 70 is damaged and needs to be replaced with a new one, a tool (such as a screwdriver) is used to remove all the fixing members S, so that the first abutting wall 31 of the support frame 30 is separated from the coupling section 20 of the first annular flange 14 of the first housing 11, and the embedding groove 36 of the support frame 30 is separated from the embedding section 15 of the first annular flange 14, so that the support frame 30 is 0 is removed from the first annular flange 14 of the first housing 11, and then the first chain 71 of the damaged zipper 70 is removed from the first rubber sleeve 40 and replaced with a new first chain 71, and the second chain 74 of the damaged zipper 70 is removed from the second rubber sleeve 60 and replaced with a new second chain 74, and finally the support frame 30 is reinstalled and fixed to the first annular flange 14 of the first housing 11.

However, in this embodiment, the annular rib 37 of the supporting frame 30 may not be covered with the first rubber sleeve 40, so that the first fixing portion 73 of the first chain plate 71 is directly fixed to the annular rib 37 of the supporting frame 30, and the second annular flange 52 of the outer cover 50 may not be covered with the second rubber sleeve 60, so that the second fixing portion 76 of the second chain plate 74 is directly fixed to the second annular flange 52 of the outer cover 50. When the zipper 70 is damaged and needs to be replaced with a new one, the support frame 30 only needs to be removed from the first annular flange 14 of the first shell 11 according to the above-mentioned disassembly method, and then the first chain 71 of the damaged zipper 70 is removed from the annular rib 37 of the support frame 30 and replaced with a new first chain 71, and the second chain 74 of the damaged zipper 70 is removed from the second annular flange 52 of the outer cover 50 and replaced with a new second chain 74, and finally the support frame 30 is reinstalled and fixed to the first annular flange 14 of the first shell 11.

As can be seen from the above, the first and second chain plates 71, 74 of the zipper 70 can be directly or indirectly mounted on the outer cover 50 and the support frame 30, and can also be easily removed and replaced with a new zipper 70.

The above are the structural features of the open suitcase structure 1 before this creation. The following will further introduce the usage and function of the open suitcase structure 1 before this creation.

In actual use, as shown in FIG. 4 and FIG. 5 , the user needs to pull the two zipper heads 77 to make the first chain tooth portion 72 and the second chain tooth portion 75 engage with each other, so that the outer cover 50 and the first shell 11 of the box case 10 are in a tightly fitted state. If the cover plate 51 of the outer cover 50 is pressed by an external force in the horizontal direction, as shown in FIG. 9 , the outer cover 50 will move toward the opening 23 of the first shell 11, and at this time, the second annular flange 52 of the outer cover 50 together with the second rubber sleeve 60 abuts against the annular rib 37 of the support frame 30 on which the first rubber sleeve 40 is mounted, so that the outer cover 50 is not easy to sink into the opening 23 of the first shell 11. Similarly, if the cover plate 51 of the outer cover 50 is pressed by an external force in an inclined direction, as shown in FIG. 10 , the outer cover 50 will also move toward the opening 23 of the first shell 11 . At this time, the annular flange 52 of the outer cover 50 together with the second rubber sleeve 60 will still abut against the annular rib 37 of the support frame 30 on which the first rubber sleeve 40 is mounted, so that the outer cover 50 is not easy to sink into the opening 23 of the first shell 11 .

However, the front-opening luggage case structure 1 is not limited to that disclosed in this embodiment. As shown in FIG. 11 , the front-opening luggage case structure 2 of the second embodiment of the present invention is roughly the same as that of the first embodiment in terms of structure. The main difference is that the first annular flange 14 of the first shell 11' provided in this embodiment has a horizontal section 16, a first segment 17 and a second segment 18, and the third segment 19 is omitted.

As shown in FIG. 12 , the structure of the open suitcase structure 3 before the third embodiment of the present invention is substantially the same as that of the first embodiment described above, and the main difference is that the present embodiment provides another first shell 11″. The structure of the first shell 11″ in the present embodiment is substantially the same as that of the first shell 11 in the first embodiment described above, and the difference is that the locking section 15′ of the first annular flange 14′ has a horizontal direction away from the opening 23. The extended horizontal section 16', a straight section 16A connected to the horizontal section 16', and a convex structure 16B protruding from the straight section 16A in a direction away from the opening 23, the convex structure 16B abuts against the first abutment wall 31 of the support frame 30, and the straight section 16A abuts against the second abutment wall 34 of the support frame 30, so that the embedding section 15' of the first annular flange 14' is tightly embedded in the embedding groove 36 of the support frame 30. It should be added that the convex structure 16B can be a convex point, a convex rib or a convex block, and in this embodiment, a convex point is used for realization. In this way, the convex structure 16B can be selected in different styles according to the needs of the manufacturer.

The use effects of the open luggage case structures 2 and 3 before the second and third embodiments are exactly the same as the open luggage case structure 1 before the first embodiment, so they will not be described in detail.

In summary, when the outer cover 50 provided by the open luggage case structures 1, 2, and 3 of the present invention is pressed by the aforementioned external force, the second annular flange 52 of the outer cover 50 abuts against the annular rib 37 of the support frame 30, so that the outer cover 50 is not easy to sink into the opening 23 of the case 10. In addition, since the first chain 71 of the zipper 70 provided by the open luggage case structure 1 of the present invention is fixed to the support frame 30, the first chain 71 and the support frame 30 can be installed to the case 10 together, or the first chain 71 and the support frame 30 can be removed from the case 10 together and replaced with a new first chain 71. Such a special structural design makes the zipper 70 easy to install and replace.

Finally, it must be reiterated that the components disclosed in the above-mentioned implementation of this invention are only for illustrative purposes and are not intended to limit the scope of this case. Replacements or changes of other equivalent components should also be covered by the scope of the patent application of this case.

1: Front-opening luggage compartment structure

2: Front-opening luggage compartment structure

3: Front-opening luggage compartment structure

10: Box shell

11: First shell

11’: First shell

11”: First shell

12: First ring wall

13: First side wall

14: First annular flange

14’: First annular flange

15: Embedded card section

15’: Embedded card section

16: Horizontal section

16’: horizontal section

16A: Straight section

16B: convex structure

17: First segment

18: Second segment

19: The third section

20: Binding segment

21: Positioning slot

22: First hole

23: Open mouth

24: Second shell

25: Second ring wall

26: Second side wall

27: Storage space

28: Pull rod

29: Casters

30: Support frame

31: First abutment wall

32: Positioning block

33: Second hole

34: Second abutment wall

35: Connecting wall

36: Card slot

37: Annular ribs

40: First rubber sleeve

50: Outer cover

51: Cover plate

52: Second annular flange

60: Second rubber sleeve

70: Zipper

71: First chain

72: First chain tooth

73: First fixed part

74: Second chain

75: Second chain tooth

76: Second fixing part

77: Zipper pull

S: Fixing parts

The following is a further description of the open suitcase structure provided by the present invention with the help of the embodiments and drawings, wherein: FIG1 is a three-dimensional assembly diagram of the open suitcase structure before the first embodiment of the present invention; FIG2 is a three-dimensional exploded diagram of the open suitcase structure before the first embodiment of the present invention; FIG3 is a front view of the first shell provided by the open suitcase structure before the first embodiment of the present invention; FIG4 is a front view of the open suitcase structure before the first embodiment of the present invention; FIG5 is a cross-sectional view along the A-A section line of FIG4; FIG6 is a cross-sectional view along the A-A section line of FIG4 ; FIG. 7 is a three-dimensional view of the support frame provided by the open suitcase structure before the first embodiment of the present invention; FIG. 8 is a three-dimensional view of the support frame provided by the open suitcase structure before the first embodiment of the present invention at another viewing angle; FIG. 9 is a schematic diagram showing that the outer cover is pressed by an external force in a horizontal direction; FIG. 10 is a schematic diagram showing that the outer cover is pressed by an external force in an inclined direction; FIG. 11 is a cross-sectional view of the open suitcase structure before the second embodiment of the present invention; and FIG. 12 is a cross-sectional view of the open suitcase structure before the third embodiment of the present invention.

1: Front-opening luggage compartment structure

10: Box shell

11: First shell

12: First ring wall

13: First side wall

14: First annular flange

20: Binding segment

21: Positioning slot

22: First hole

23: Open mouth

24: Second shell

25: Second ring wall

26: Second side wall

27: Storage space

28: Pull rod

29: Casters

30: Support frame

37: Annular ribs

40: First rubber sleeve

50: Outer cover

51: Cover plate

52: Second annular flange

60: Second rubber sleeve

70: Zipper

71: First chain

74: Second chain

77: Zipper pull

Claims (10)

A front-opening luggage case structure comprises: A case having a first side wall, a first annular flange extending inwardly from the first side wall, and an opening formed by the first annular flange, the first annular flange having an embedding section and a coupling section connected to the embedding section, the opening connecting the inside and outside of the case; A support frame having a first abutting wall, an annular convex rib protruding from the first abutting wall, and an embedding groove, the embedding groove and the embedding section of the first annular flange are mutually embedded, and the first abutting wall is detachably fixed to the coupling section of the first annular flange; An outer cover is arranged outside the box shell and corresponds to the opening of the box shell, and the outer cover has a second annular flange; and A zipper has a first chain and a second chain that are engaged with each other, the first chain is fixed to the annular rib of the support frame, and the second chain is fixed to the second annular flange of the outer cover; Wherein, when the outer cover is pressed by an external force, the second annular flange of the outer cover abuts against the annular rib of the support frame. A front-opening suitcase structure as described in claim 1, wherein the support frame further has a second abutment wall opposite to the first abutment wall, the embedding groove is formed between the first and second abutment walls, and the embedding section of the first annular flange abuts against the first and second abutment walls. A front-opening suitcase structure as described in claim 2, wherein the locking section of the first annular flange has a horizontal section extending horizontally in a direction away from the opening, a first segment vertically connected to the horizontal section, and a second segment arc-shapedly connected to the first segment; the first segment abuts against the first abutment wall of the support frame, and the second segment abuts against the second abutment wall of the support frame. A front-opening suitcase structure as described in claim 3, wherein the support frame also has a connecting wall connecting the first and second abutment walls; the embedding section of the first annular flange also has a third section connected to the second section, and the third section abuts against the first abutment wall and the connecting wall of the support frame. A front-opening suitcase structure as described in claim 2, wherein the locking section of the first annular flange has a horizontal section extending horizontally in a direction away from the opening, a vertical section connected to the horizontal section, and a convex structure extending from the vertical section in a direction away from the opening, the convex structure abuts against the first abutment wall of the support frame, and the vertical section abuts against the second abutment wall of the support frame. A front-opening suitcase structure as described in claim 5, wherein the convex structure of the embedding section is a protrusion, a rib or a block. As described in claim 1, the first annular flange also has a plurality of first holes passing therethrough; the first abutting wall of the support frame also has a plurality of second holes passing therethrough; the front-opening suitcase structure further includes a plurality of fixing members, each of which is penetrated and fixed in each of the first and second holes. As described in claim 7, the front-opening suitcase structure, wherein the coupling section of the first annular flange also has a plurality of recessed positioning grooves, each of which is connected to one of the first holes; the first abutment wall of the support frame also has a plurality of protruding positioning blocks, each of which is penetrated by one of the second holes, and each of which is accommodated in one of the positioning grooves. A front-opening suitcase structure as described in claim 1, wherein the first chain plate has a first chain tooth portion and a first fixing portion, the first chain tooth portion is fixed to the first fixing portion, and the first fixing portion is fixed to the annular rib of the support frame; the second chain plate has a second chain tooth portion and a second fixing portion, the second chain tooth portion is fixed to the second fixing portion and engaged with the first chain tooth portion, and the second fixing portion is fixed to the second annular flange of the outer cover. The front-opening suitcase structure as described in claim 9 further includes a first rubber sleeve and a second rubber sleeve, wherein the first rubber sleeve is sleeved on the annular rib of the support frame, and the first fixing portion of the first chain is indirectly fixed to the annular rib of the support frame through the first rubber sleeve; the second rubber sleeve is sleeved on the second annular flange of the outer cover, and the second fixing portion of the second chain is indirectly fixed to the second annular flange of the outer cover through the second rubber sleeve.