Front-opening travel bag

Abstract

We offer a front-opening travel bag where the front door is less likely to sink into the opening of the casing. [Solution] The device comprises a housing 10, a support frame 30, a front door 50, and a fastener 70. The housing has a first annular projection edge 14 and an opening 23. The first annular projection edge has interconnected fitting portions and joining portions 20. The opening is formed by being surrounded by the first annular projection edge. The support frame has a first contact wall, an annular projection rib 37, and a fitting groove. The first contact wall is detachably fixed to the joining portion of the first annular projection edge. The fitting groove and the fitting portion of the first annular projection edge engage with each other. The front door is mounted on the outside of the housing so as to correspond to the opening of the housing and has a second annular projection edge 52. The fastener has two interlocking teeth members 71 and 74, one of which is fixed to the annular projection rib of the support frame, and the other teeth member is fixed to the second annular projection edge of the front door.

Description

Technical Field

[0001] The present invention relates to a front-opening travel bag, and more particularly to a front-opening travel bag in which not only is the front door difficult to sink into the opening of the housing, but also the fastening of the fastener and the replacement thereof are convenient.

Background Art

[0002] A well-known front-opening travel bag is composed of a housing and a front door. The housing is composed of a first shell and a second shell that fit together. The first shell has a first annular protruding edge portion and an opening. The opening is formed surrounded by the first annular protruding edge portion. The front door is mounted on the outside of the housing corresponding to the opening of the first shell and has a second annular protruding edge portion.

[0003] When manufacturing a well-known front-opening travel bag, first, the joint portion of the first shell and the front door that are integrated is cut with a cutting knife by press molding of a thermoplastic material, the first shell and the front door are separated, and an opening is formed in the first shell. At the same time, since a part of the outer peripheral edge of the front door is cut off with a cutting knife, the size of the front door is smaller than the size of the opening of the first shell. Therefore, after the assembly work of the front door and the housing is completed, the front door often sinks into the opening of the first shell of the housing without being able to withstand an external force.

[0004] In a well-known front-opening travel bag, for the fastener for joining the housing and the front door, one side is joined to the first annular protruding edge portion of the first shell by sewing, and the other side is joined to the second annular protruding edge portion of the front door by sewing. If both sides of the fastener are aligned and correspond to each other, the housing and the front door can be joined. However, since the volume of the first shell is relatively large, not only is the work of sewing the fastener difficult, but also the replacement of the fastener is difficult when the fastener is broken. In contrast, devising a front-opening travel bag in which not only is the front door difficult to sink into the opening of the housing, but also the fastening of the fastener and the replacement thereof are convenient is a major issue in the industry. [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] In view of the above-mentioned problems, the main objective of this invention is to provide a front-opening travel bag in which the front door is less likely to sink into the opening of the casing, and which is also convenient for attaching and replacing the zipper. [Means for solving the problem]

[0006] To solve the aforementioned problems, the front-opening travel bag comprises a housing, a support frame, a front door, and a zipper. The housing has a first side wall, a first annular projection edge, and an opening. The first annular projection edge is formed extending inward in an annular shape from the first side wall and has a fitting portion and a joint portion connected to the fitting portion. The opening is formed by being surrounded by the first annular projection edge and connects the inside and outside of the housing. The support frame has a first contact wall, an annular projection rib, and a fitting groove. The first contact wall is detachably fixed to the joint portion of the first annular projection edge. The annular projection rib is formed projecting from the first contact wall. The fitting groove and the fitting portion of the first annular projection edge engage with each other. The front door is mounted on the outside of the housing so as to correspond to the opening of the housing and has a second annular projection edge. The zipper has a first tooth member and a second tooth member that interlock. The first tooth member is fixed to the annular projection rib of the support frame. The second gear member is fixed to the second annular projection edge of the front door.

[0007] When the front door of the front-opening travel bag according to this invention withstands external force, the second annular protruding edge of the front door abuts against the annular protruding rib of the support frame due to the technical features described above, so the front door is less likely to sink into the opening of the housing. Furthermore, since the first teeth member of the zipper of the front-opening travel bag according to this invention is fixed to the support frame, the first teeth member and the support frame can be attached to the housing together, or the first teeth member and the support frame can be removed from the housing together and a new first teeth member can be attached. In other words, the above structural features make it easy to attach and replace the zipper.

[0008] In a relatively preferred case, the support frame has a second abutment wall opposite to the first abutment wall, and a fitting groove formed between the first and second abutment walls. The fitting portion of the first annular projection edge abuts against the first and second abutment walls. The fitting portion of the first annular projection edge fits into the fitting groove of the support frame by the first and second abutment walls of the support frame.

[0009] In a relatively preferred case, the fitting portion of the first annular projection edge has a horizontal portion that extends horizontally opposite to the opening, a first portion perpendicularly connected to the horizontal portion, and an arc-shaped second portion connected to the first portion. The first portion abuts against the first contact wall of the support frame. The second portion abuts against the second contact wall of the support frame. Due to the structural features described above, the fitting portion of the first annular projection edge fits into the fitting groove of the support frame.

[0010] In a relatively favorable case, the support frame has a connecting wall that connects the first abutment wall and the second abutment wall. The fitting portion of the first annular projection edge has a third portion that is connected to the second portion. The third portion abuts the first abutment wall and the connecting wall of the support frame. Due to the structural features described above, the fitting portion of the first annular projection edge fits into the fitting groove of the support frame.

[0011] In a relatively preferable case, the fitting portion of the first annular projection edge has a horizontal portion that extends horizontally in the direction opposite to the opening, a straight portion that is connected to the horizontal portion, and a convex structure that extends and protrudes from the straight portion in the direction opposite to the opening. The convex structure abuts against the first contact wall of the support frame. The straight portion abuts against the second contact wall of the support frame. Due to the structural features described above, the fitting portion of the first annular projection edge fits into the fitting groove of the support frame.

[0012] In relatively preferable cases, the convex structure of the mating portion is a point-like projection, a projection rib, or a convex block. In other words, the convex structure is molded according to the manufacturer's needs.

[0013] In a relatively preferred case, the first annular projection edge has a plurality of first holes. The plurality of first holes penetrate the first annular projection edge. The first contact wall of the support frame has a plurality of second holes. The plurality of second holes penetrate the first contact wall of the support frame. The front-opening travel bag further comprises a plurality of fastening members. Each of the fastening members is inserted into and secured in the first and second holes, respectively. Due to the structural features described above, the first contact wall of the support frame is tightly fixed to the joint portion of the first annular projection edge.

[0014] In a relatively favorable case, the joint portion of the first annular projection edge has a plurality of concave positioning grooves. Each positioning groove connects to a first hole. The first contact wall of the support frame further has a plurality of convex positioning blocks. Each second hole penetrates a positioning block. Each positioning block is housed in a positioning groove. Due to the structural features described above, the first contact wall of the support frame is positioned at the joint portion of the first annular projection edge.

[0015] In a relatively favorable case, the first gear member has a first gear and a first fixing part. The first gear is fixed to the first fixing part. The first fixing part is fixed to the annular projection rib of the support frame. The second gear member has a second gear and a second fixing part. The second gear is fixed to the second fixing part so as to mesh with the first gear. The second fixing part is fixed to the second annular projection edge of the front door. If the first gear member and the second gear member are damaged, the structural features described above allow the broken first gear member and the second gear member to be removed from the annular projection rib and the second annular projection edge, and new first gear member and second gear member to be installed.

[0016] In relatively preferred cases, the front-opening travel bag according to the present invention further comprises a first sleeve and a second sleeve. The first sleeve is positioned to overlap the annular projection rib of the support frame. The first fixing portion of the first gear member is indirectly fixed to the annular projection rib of the support frame via the first sleeve. The second sleeve is positioned to overlap the second annular projection edge of the front door. The second fixing portion of the second gear member is indirectly fixed to the second annular projection edge of the front door via the second sleeve. If the first gear member and the second gear member are damaged, the above-described structural features allow the broken first gear member and the second gear member to be removed from the first and second sleeves, and new first gear member and second gear member to be installed.

[0017] The detailed structure, features, assembly, and method of use of the front-opening travel bag according to this invention will be clarified through the detailed description of the embodiments below. Furthermore, it should be understood by anyone with common sense in the field of this invention that the following detailed description and the embodiments presented herein are merely examples for explaining this invention and cannot limit the scope of the claims of this invention. [Brief explanation of the drawing]

[0018] [Figure 1] This is a perspective view showing a travel bag according to the first embodiment of the present invention. [Figure 2] This is an exploded perspective view showing a travel bag according to the first embodiment of the present invention. [Figure 3] This is a front view showing the first shell of a travel bag according to the first embodiment of the present invention. [Figure 4] This is a front view showing a travel bag according to the first embodiment of the present invention. [Figure 5] This is a cross-sectional view along line AA in Figure 4. [Figure 6] This is a cross-sectional view along line AA in Figure 4. [Figure 7] This is a perspective view showing a support frame for a travel bag according to the first embodiment of the present invention. [Figure 8]Perspective view of the support frame of the travel bag according to the first embodiment of the present invention, seen from another angle. [Figure 9] Side view showing the state in which the front door of the travel bag according to the first embodiment of the present invention withstands a lateral external force. [Figure 10] Side view showing the state in which the front door of the travel bag according to the first embodiment of the present invention withstands an external force in an oblique direction. [Figure 11] Cross-sectional view showing the travel bag according to the second embodiment of the present invention. [Figure 12] Cross-sectional view showing the travel bag according to the third embodiment of the present invention.

Mode for Carrying Out the Invention

[0019] Hereinafter, the front-opening travel bag according to the present invention will be described based on the drawings. Note that the technical features of the present invention are not limited to the description of the following embodiments. In the specification, explanations and terms related to technology should be understandable to those with common sense in the field related to the present invention. Directional terms such as up and down, left and right, top, bottom, inside, and outside are expressed based on the directions usually used.

[0020] (First Embodiment) As shown in FIGS. 1 and 2, the front-opening travel bag 1 according to the first embodiment of the present invention includes a housing 10, a support frame 30, a front door 50, and a fastener 70.

[0021] As shown in Figures 2 to 4, the housing 10 is composed of a first shell 11 and a second shell 24 that fit together. The first shell 11 has a first annular wall surface 12, a first side wall 13, a first annular projection edge 14, and an opening 23. The first side wall 13 is connected annularly to the first annular wall surface 12. The first annular projection edge 14 is formed by extending annularly inward from the first side wall 13. The opening 23 is formed by being surrounded by the first annular projection edge 14. The first annular projection edge 14 of the first shell 11 has a fitting portion 15 and a joining portion 20 connected to the fitting portion 15. As shown in Figures 3, 5, and 6, the fitting portion 15 is located at the top, left side, and right side of the first annular projection edge 14. The fitting portion 15 has a horizontal portion 16 that extends horizontally opposite to the opening 23, a first portion 17 that is perpendicularly connected to the horizontal portion 16, an arc-shaped second portion 18 that is connected to the first portion 17, and a third portion 19 that is connected to the second portion 18. The joining portion 20 is located on the bottom edge of the first annular protruding edge portion 14. The joining portion 20 has a plurality of mutually spaced concave positioning grooves 21 and a plurality of first holes 22. In this embodiment, there are three positioning grooves 21, but it is not limited to these. Each positioning groove 21 is connected to a first hole 22.

[0022] As shown in Figure 2, the second shell 24 has a second annular wall surface 25 opposite the first annular wall surface 12, and a second side wall 26 connected annularly to the second annular wall surface 25. The first annular wall surface 12, the first side wall 13, the second annular wall surface 25, and the second side wall 26 constitute a storage space 27 for storing luggage. The opening 23 of the first shell 11 connects the storage space 27 inside the housing 10 to the outside of the housing 10. The second shell 24 has an extendable carry bar 28. The housing 10 has four casters 29 at the bottom and is supported by the four casters 29.

[0023] As shown in Figures 5, 7, and 8, the support frame 30 has an annular first abutment wall 31, a second abutment wall 34, a connecting wall 35, and a fitting groove 36. The second abutment wall 34 is positioned parallel to and spaced apart from the first abutment wall 31. The connecting wall 35 connects the first abutment wall 31 and the second abutment wall 34. The fitting groove 36 is composed of the first abutment wall 31, the second abutment wall 34, and the connecting wall 35. The first abutment wall 31 has a plurality of positioning blocks 32 formed recessed on its inner bottom edge and projecting outward. The plurality of positioning blocks 32 are positioned spaced apart from each other. The second hole 33 penetrates the plurality of positioning blocks 32. In this embodiment, there are three positioning blocks 32, but it is not limited to these. The support frame 30 further has an annular projection rib 37 and a first sleeve 40. The annular projection rib 37 is formed projecting outward from the first abutment wall 31. The first sleeve 40 is positioned to overlap the annular projection rib 37.

[0024] As shown in Figure 5, when performing the assembly work, when the fitting groove 36 of the support frame 30 is fitted with the fitting portion 15 of the first annular protruding edge 14 of the first shell 11, the first portion 17 of the fitting portion 15 abuts against the first contact wall 31 of the support frame 30, the second portion 18 abuts against the second contact wall 34 of the support frame 30, and the third portion 19 abuts against the first contact wall 31 and the connecting wall 35 of the support frame 30, so that the fitting portion 15 of the first annular protruding edge 14 fits securely into the fitting groove 36 of the support frame 30. Subsequently, when the first contact wall 31 of the support frame 30 is brought into contact with the joining portion 20 of the first annular protruding edge 14, each positioning block 32 of the first contact wall 31 is stored in the positioning groove 21 of the joining portion 20, so that the first contact wall 31 of the support frame 30 is positioned at the joining portion 20 of the first annular protruding edge 14. Next, by inserting and fixing fixing members S (e.g., bolts) into the multiple first holes 22 and the multiple second holes 33, the first contact wall 31 of the support frame 30 is firmly fixed to the joint portion 20 of the first annular protruding edge portion 14. The method of fixing the first contact wall 31 and the joint portion 20 is not limited to this embodiment, and adhesive materials, fastening members, or other fixing members may be used. Since this embodiment employs a method of fixing the first contact wall 31 and the joint portion 20 by inserting fixing members S, the first contact wall 31 and the joint portion 20 can be tightly joined, or the first contact wall 31 can be separated from the joint portion 20.

[0025] As shown in Figures 2 and 5, the front door 50 has a surface plate 51, a second annular projection edge 52, and a second sleeve 60. The second annular projection edge 52 is annularly connected to the surface plate 51. The second sleeve 60 is positioned to overlap the second annular projection edge 52. The front door 50 is mounted on the outside of the housing 10 so as to correspond to the opening 23 of the housing 10.

[0026] As shown in Figures 2, 5, and 6, the fastener 70 has a first tooth member 71, a second tooth member 74, and two sliders 77. The first tooth member 71 has a first tooth 72 and a first fixing part 73. The first tooth 72 is fixed to the first fixing part 73. The first fixing part 73 and the first sleeve 40 are fixed together to the annular projection rib 37 of the support frame 30 by a suturing method. In other words, the first fixing part 73 is indirectly fixed to the annular projection rib 37 of the support frame 30 via the first sleeve 40. The second tooth member 74 has a second tooth 75 and a second fixing part 76. The second tooth 75 is fixed to the second fixing part 76 and engages with and disengages from the first tooth 72 by the two sliders 77. The second fixing part 76 and the second sleeve 60 are fixed together to the second annular projection edge 52 of the front door 50 by a suturing method. In other words, the second fixing portion 76 is indirectly fixed to the second annular protruding edge portion 52 of the front door 50 via the second sleeve 60.

[0027] As shown in Figures 5 and 6, when replacing a broken fastener 70 with a new one, all fixing members S are removed with a tool such as a screwdriver, the joint portion 20 of the first contact wall 31 of the support frame 30 and the first annular protruding edge portion 14 of the first shell 11 are separated, and the fitting groove 36 of the support frame 30 and the fitting portion 15 of the first annular protruding edge portion 14 are separated, allowing the support frame 30 to be removed from the first annular protruding edge portion 14 of the first shell 11. Next, the first tooth member 71 of the broken fastener 70 is removed from the first sleeve 40 and replaced with a new first tooth member 71. The second tooth member 74 of the broken fastener 70 is removed from the second sleeve 60 and replaced with a new second tooth member 74. Finally, the support frame 30 is reattached to the first annular protruding edge portion 14 of the first shell 11.

[0028] This embodiment is not limited to the above, and a method can also be adopted in which the first sleeve 40 is not placed over the annular projection rib 37 of the support frame 30, the first fixing part 73 of the first tooth member 71 is fixed to the annular projection rib 37 of the support frame 30, and at the same time the second sleeve 60 is not placed over the second annular projection edge 52 of the front door 50, and the second fixing part 76 of the second tooth member 74 is fixed to the second annular projection edge 52 of the front door 50. In other words, when replacing a broken fastener 70 with a new fastener 70, the support frame 30 is removed from the first annular projection edge 14 of the first shell 11 according to the removal method described above. Next, the first tooth member 71 of the broken fastener 70 is removed from the annular projection rib 37 of the support frame 30 and replaced with a new first tooth member 71. The second tooth member 74 of the broken fastener 70 is removed from the second annular projection edge 52 of the front door 50 and replaced with a new second tooth member 74. Next, the support frame 30 can be reattached to the first annular protruding edge portion 14 of the first shell 11.

[0029] In other words, not only can the first tooth member 71 and the second tooth member 74 of the fastener 70 be attached directly or indirectly to the support frame 30 and the front door 50, but the first tooth member 71 and the second tooth member 74 of the fastener 70 can also be easily removed from the support frame 30 and the front door 50 and replaced with a new fastener 70.

[0030] The above describes the structural features of the front-opening travel bag 1 according to the present invention. Next, we will explain how to use the front-opening travel bag 1 and the effects achieved.

[0031] When using the front-opening travel bag 1, as shown in Figures 4 and 5, the first teeth 72 and second teeth 75 of the two sliders 77 interlock to join the front door 50 to the first shell 11 of the housing 10. As shown in Figure 9, when the front door 50 is moved toward the opening 23 of the housing 10 while the surface plate 51 of the front door 50 withstands lateral external force, the second annular protruding edge 52 and the second sleeve 60 of the front door 50 come into contact with the annular protruding rib 37 of the support frame 30 over which the first sleeve 40 is placed, so that the front door 50 is less likely to sink into the opening 23 of the housing 10. Furthermore, when the front door 50 is moved toward the opening 23 of the housing 10 after the surface plate 51 of the front door 50 has withstood an external force in an oblique direction, the second annular protruding edge 52 of the front door 50 and the second sleeve 60 come into contact together with the annular protruding rib 37 of the support frame 30 over which the first sleeve 40 is placed, so the front door 50 is less likely to sink into the opening 23 of the housing 10.

[0032] (Second Embodiment) The front-opening travel bag according to the present invention is not limited to the first embodiment. As shown in Figure 11, the difference between the front-opening travel bag 2 according to the second embodiment and the front-opening travel bag 1 according to the first embodiment is as follows. In the second embodiment, the fitting portion 15 of the first annular protruding edge portion 14 of the first shell 11' is composed of a horizontal portion 16, a first portion 17 and a second portion 18, since the third portion 19 is omitted.

[0033] (Third embodiment) As shown in Figure 12, the main differences between the front-opening travel bag 3 according to the third embodiment and the front-opening travel bag 1 according to the first embodiment, namely the difference between the first shell 11" and the first shell 11, are as follows. In the third embodiment, the fitting portion 15' of the first annular protruding edge 14' of the first shell 11" has a horizontal portion 16' that extends horizontally in the direction opposite to the opening 23, a straight portion 16A connected to the horizontal portion 16', and a convex structure 16B that extends and protrudes from the straight portion 16A in the direction opposite to the opening 23. The convex structure 16B abuts against the first contact wall 31 of the support frame 30. The straight portion 16A abuts against the second contact wall 34 of the support frame 30. Due to the structural features described above, the fitting portion 15' of the first annular protruding edge 14' fits into the fitting groove 36 of the support frame 30. The convex structure 16B is a point-like projection, a projection rib, or a convex block. In this embodiment, the convex structure 16B is a point-like projection, but it is not limited to this and may be molded according to the manufacturer's needs.

[0034] Since the effects achieved by the front-opening travel bag 2 according to the second embodiment and the front-opening travel bag 3 according to the third embodiment are the same as those achieved by the front-opening travel bag 1 according to the first embodiment, a detailed explanation will be omitted.

[0035] To summarize the above, in the front-opening travel bags 1, 2, and 3 according to the present invention, when the front door 50 withstands external force, due to the above-described technical features, the second annular protruding edge 52 of the front door 50 abuts against the annular projection rib 37 of the support frame 30, so that the front door 50 is less likely to sink into the opening 23 of the housing 10. Since the first tooth member 71 of the zipper 70 of the front-opening travel bag 1 is fixed to the support frame 30, the first tooth member 71 and the support frame 30 can be attached to the housing 10 together, or the first tooth member 71 and the support frame 30 can be removed from the housing 10 together and a new first tooth member 71 can be attached. In other words, the above-described structural features make it easy to attach and replace the zipper 70.

[0036] As stated above, the present invention is not limited in any way to the embodiments described above, and can be implemented in various forms without departing from the spirit of the invention. [Explanation of Symbols]

[0037] 1, 2, 3: Front-opening travel bags 10: Cabinet 11, 11', 11": First shell 12: First ring wall 13:First side wall 14, 14': First annular projection edge 15, 15': Mating part 16, 16': horizontal part 16A: Straight line part 16B:Convex structure 17:First part 18:Second part 19:Third part 20:Joining site 21: Positioning groove 22:First hole 23: Opening 24: Second Shell 25: Second ring wall 26:Second side wall 27: Containment space 28: Carry bar 29: Caster 30: Support frame 31:First contact wall 32: Positioning block 33:Second hole 34:Second contact wall 35: Connecting wall 36: Fitting groove 37: Annular projection rib 40: First Sleeve 50: Front Door 51: Surface plate 52: Second annular projection edge 60: Second sleeve 70: Zipper 71: First tooth component 72: First tooth 73:First fixed part 74: Second tooth member 75: Second tooth 76:Second fixed part 77: Slider S: Fixing member

Claims

1. Equipped with a housing, support frame, front door and fasteners, The housing has a first side wall, a first annular projection edge, and an opening, the first annular projection edge is formed extending inward in an annular shape from the first side wall and has a fitting portion and a joining portion connected to the fitting portion, the opening is formed surrounded by the first annular projection edge and connects the inside and outside of the housing, The support frame has a first contact wall, an annular projection rib, and a fitting groove, the first contact wall is detachably fixed to the joint portion of the first annular projection edge, the annular projection rib is formed to project from the first contact wall, and the fitting groove and the fitting portion of the first annular projection edge engage with each other. The front door is mounted on the outside of the housing so as to correspond to the opening of the housing, and has a second annular protruding edge. The fastener has a first tooth member and a second tooth member that interlock, the first tooth member being fixed to the annular projection rib of the support frame, and the second tooth member being fixed to the second annular projection edge of the front door. A front-opening travel bag characterized in that, when the front door withstands an external force, the second annular projection edge of the front door abuts against the annular projection rib of the support frame.

2. The support frame has a second contact wall opposite to the first contact wall, and a fitting groove formed between the first contact wall and the second contact wall. The front-opening travel bag according to claim 1, characterized in that the fitting portion of the first annular protruding edge abuts against the first contact wall and the second contact wall.

3. The front-opening travel bag according to claim 2, wherein the fitting portion of the first annular protruding edge has a horizontal portion that extends horizontally opposite to the opening, a first portion that is perpendicularly connected to the horizontal portion, and an arc-shaped second portion that is connected to the first portion, the first portion abuts against the first contact wall of the support frame, and the second portion abuts against the second contact wall of the support frame.

4. The support frame further has a connecting wall that connects the first contact wall and the second contact wall. The front-opening travel bag according to claim 3, characterized in that the fitting portion of the first annular protruding edge further has a third portion connected to the second portion, and the third portion abuts against the first contact wall and the connecting wall of the support frame.

5. The fitting portion of the first annular protruding edge has a horizontal portion that extends horizontally in the direction opposite to the opening, a straight portion that is connected to the horizontal portion, and a convex structure that extends and protrudes from the straight portion in the direction opposite to the opening, wherein the convex structure abuts against the first contact wall of the support frame, and the straight portion abuts against the second contact wall of the support frame, as described in claim 2.

6. The front-opening travel bag according to claim 5, characterized in that the convex structure of the fitting portion is a point-shaped projection, a protruding rib, or a convex block.

7. Furthermore, it is equipped with multiple fixing members, The first annular protruding edge further has a plurality of first holes, The first contact wall of the support frame has a plurality of second holes, The front-opening travel bag according to claim 1, characterized in that the multiple fixing members are each inserted into and fixed in the first hole and the second hole, respectively.

8. The joining portion of the first annular projection edge has a plurality of concave positioning grooves, each of which is connected to the first hole. The front-opening travel bag according to claim 7, characterized in that the first contact wall of the support frame further has a plurality of convex positioning blocks, each of the second holes penetrates the positioning block, and each of the positioning blocks is stored in the positioning groove.

9. The first tooth member has a first tooth and a first fixing part, the first tooth is fixed to the first fixing part, and the first fixing part is fixed to the annular projection rib of the support frame, and the second tooth member has a second tooth and a second fixing part, The front-opening travel bag according to claim 1, characterized in that the second teeth are fixed to the second fixing part so as to mesh with the first teeth, and the second fixing part is fixed to the second annular protruding edge of the front door.

10. Furthermore, it is equipped with a first sleeve and a second sleeve, The first sleeve is positioned to overlap the annular projection rib of the support frame, The first fixing portion of the first tooth member is indirectly fixed to the annular projection rib of the support frame via the first sleeve. The second sleeve is positioned to overlap the second annular projection edge of the front door, The front-opening travel bag according to claim 9, characterized in that the second fixing portion of the second tooth member is indirectly fixed to the second annular protruding edge of the front door via the second sleeve.

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