Flexible access and packing luggage
By introducing multiple opening positions and options in the suitcase, the issues of volume utilization and stability when packing large items in hard-shell suitcases are resolved, providing flexible volume utilization and improving safety during transportation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- AITI LUGGAGE CO LTD
- Filing Date
- 2024-12-13
- Publication Date
- 2026-07-24
AI Technical Summary
Existing hard-shell suitcases are difficult to use effectively when packing large items, and require frequent repositioning during transportation to access items, leading to stability and security issues.
A suitcase has been designed with a main body and a lid connected by a hinge. The lid has an unfoldable partition and flap, providing multiple opening positions and options, including independent or combined entry of the main body and lid, which enhances volume utilization and stability.
It achieves flexible volume utilization, allowing items to enter the main body and cover volumes simultaneously or separately, improving the packing efficiency of large items and maintaining stability during transportation, thus reducing the risk of items falling out or tipping over.
Smart Images

Figure CN122458873A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of luggage, such as suitcases, which include a pair of hard shells. Background Technology
[0002] Hard-sided suitcases (also known as rigid-shell, hard-sided, or rigid-structure suitcases) are typically constructed from a rigid material that forms the main surface of the suitcase. For example, a hard-sided suitcase may be constructed from a molded plastic shell. The molded plastic shell may be formed into a three-dimensional shape that, when assembled, defines the main surface of the suitcase.
[0003] Typically, each shell has a main surface that defines the length and width of the suitcase. Each shell extends vertically from the main surface to form the depth of the shell. The height of the suitcase includes the depth of the main shell plus the depth of the lid shell. Opposite the main surface of each shell is the shell opening. The two shells are usually hinged together on one side. In one usage orientation, the suitcase is lowered so that the main surface of the main shell is facing down on a flat surface. In this way, when the lid shell pivots about its hinge, the main surface of the lid shell is also facing down. This exposes the internal volume of the suitcase, with the shell openings of both the main shell and the lid shell facing up.
[0004] Typically, each shell has the same depth. Therefore, when packing a suitcase, half the volume can be used in one shell, and the other half in the other. It's also common to have a partition at the opening of the lid, allowing the lid to be closed before being shut, preventing items from falling out when the lid is turned upside down.
[0005] If the item is large enough to exceed the volume of one of the shells, it may be difficult to pack.
[0006] In the second usage orientation (typically when transporting suitcases), the two shells are usually reoriented to be arranged side by side, with the main surface extending laterally. Wheels may be provided, with one pair of wheel assemblies located on the main shell and another pair of wheel assemblies located on the cover shell.
[0007] In addition, in order to access items inside the suitcase and prevent items from falling out, it is usually necessary to redirect the suitcase from the second usage orientation back to the first usage orientation. Summary of the Invention
[0008] In this context, a luggage item is provided, including:
[0009] The main body includes a concave main body shell, the concave main body shell having a main body surface and an interior, the interior defining a main body accommodating volume, the main body accommodating volume being accessible through a main body opening opposite to the main body surface;
[0010] A cover body, the cover body including a concave cover shell having a main cover surface and an interior, the interior defining a cover receiving volume, the cover receiving volume being accessible through a first cover opening opposite to the main cover surface;
[0011] The base includes the base surface of the main body, the base surface of the cover, and multiple wheel assemblies;
[0012] The top, which is opposite to the base, includes the top surface of the main body, the top surface of the cover, and a top handle;
[0013] The first side portion includes a first side surface of the main body, a first side surface of the cover, and a side handle;
[0014] The second side portion includes a second side surface of the body, a second side surface of the cover, and a hinge located between the body and the cover, the hinge being used to move the cover relative to the body between the following positions:
[0015] In the main open position, the main body receiving volume can enter through the main body opening, and the cover receiving volume can enter through the first cover opening; and
[0016] In the closed position, the main body opening engages with the first cover opening, such that the main body opening is closed by the cover and the first cover opening is closed by the main body.
[0017] The cover also includes:
[0018] A cover partition extending from the interior of the top surface of the cover body, the cover partition having an unfolded configuration and a closed configuration, wherein in the unfolded configuration the cover partition closes the first cover opening, and in the closed configuration the cover partition allows entry through the first cover opening; and
[0019] A second cover opening is provided in the concave cover housing to provide a secondary open position so as to allow access to the cover receiving volume when the cover body is in the closed position relative to the body.
[0020] In this way, one can (a) enter only the main body volume without entering the lid volume, (b) enter only the lid volume without entering the main body volume, (c) enter both the main body volume and the lid volume respectively, and (d) enter both the main body volume and the lid volume simultaneously.
[0021] The main surface of the cover may include the second cover opening.
[0022] This provides a large opening, allowing various items to enter the lid's accommodating volume.
[0023] The cover may further include a cover plate, the cover plate having:
[0024] In the flap-open position, the second flap opening allows access to the flap-receiving volume; and
[0025] In the closed position of the cover, the second cover opening is closed by the cover.
[0026] In this way, the second cover opening can be opened or closed directly.
[0027] The luggage may also include a flap zipper disposed around the periphery of the flap for releasably holding the flap in the closed position.
[0028] The cover can be hingedly attached to the second side surface of the cover body via a cover hinge.
[0029] The cover zipper can extend between one end of the cover hinge and the other end of the cover hinge.
[0030] In this way, when closed, the cover can completely seal the second cover opening.
[0031] The luggage may also include a cover partition having an unfolded configuration and a closed configuration, wherein in the unfolded configuration the cover partition closes the first cover opening, and in the closed configuration the cover partition allows entry through the first cover opening.
[0032] In this way, the items in the cover's accommodating volume can remain separate from the items in the main body's accommodating volume.
[0033] The cover partition can be attached to the top surface of the cover.
[0034] In this way, when the suitcase is in its first orientation with the wheels facing down, the lid will naturally droop under the influence of gravity.
[0035] The cover plate can be releasably attached to a first side surface adjacent to the cover, a base surface adjacent to the cover, and a second side surface adjacent to the cover.
[0036] The cover partition can be releasably attached to a first side surface adjacent to the cover, a base surface adjacent to the cover, and a second side surface adjacent to the cover via a cover partition zipper.
[0037] The luggage item may also include a tag suspended near the top surface of the cover, including a first fastening element, and wherein the cover partition includes a second fastening element, wherein the first fastening element and the second fastening element are configured to cooperate with each other so that the cover partition can be held by the tag.
[0038] In this way, the cover can be conveniently stored when not in use.
[0039] The first fastening element and the second fastening element may include a hook fastening element and a ring fastening element.
[0040] The luggage may also include a second main opening, which may occupy most or all of the main surface of the main body.
[0041] This approach provides further increased flexibility in usage.
[0042] The luggage item may also include a body piece hinged to a second side surface of the body via a body piece hinge and configured to close the second body opening as a whole, and optionally include a body piece zipper disposed around the periphery of the body piece between one end of the body piece hinge and the other end of the body piece hinge.
[0043] The luggage may also include a main partition having an unfolded configuration and a non-unfolded configuration. In the unfolded configuration, the main partition closes the first main opening, and in the non-unfolded configuration, the main partition allows entry through the first main opening. Attached Figure Description
[0044] This invention can be implemented in various ways. Specific embodiments will now be described by way of example and with reference to the accompanying drawings, wherein:
[0045] Figure 1 A frontal perspective perspective view of luggage items is shown according to the prior art.
[0046] Figure 2 It shows Figure 1 The rear-view perspective of the suitcase shown.
[0047] Figure 3 It shows Figure 1 and Figure 2 The suitcase shown is open and in the second orientation.
[0048] Figure 4 A suitcase according to an embodiment shown in this disclosure is illustrated.
[0049] Figure 5 It shows Figure 4The suitcase shown is in a second orientation suitable for packing suitcases.
[0050] Figure 6a It shows Figure 4 and Figure 5 The suitcase shown is in its secondary open position with the lid and partition in an unfolded configuration.
[0051] Figure 6b It shows Figure 4 , Figure 5 and Figure 6a The suitcase shown is in its main open position with the lid in its unfolded configuration.
[0052] Figure 7 , Figure 8 and Figure 9 The sequence shows the roll-up cover partition and its retention in an unexpanded configuration. Detailed Implementation
[0053] Figure 1 A front-view perspective view of luggage items, specifically a suitcase 10, is shown according to the prior art. Figure 2 It shows Figure 1 The rear-view perspective of the suitcase shown. Figure 1 and Figure 2 The luggage 10 is shown in a first orientation with the wheels facing down, suitable for transporting the luggage 10. Figure 3 It shows Figure 1 and Figure 2 The suitcase 10 shown is in the open position and in the second orientation, with the wheels facing to the side, suitable for packing the suitcase 10.
[0054] Figures 1 to 3 The existing luggage 10 includes a body 200 and a lid 300. The body 200 includes a concave body shell 210 having a main body surface 220 and an interior defining a body-accommodating volume accessible through a body opening 230. The lid 300 includes a concave lid shell 310 having a lid main surface 320 and an interior defining a lid-accommodating volume through a first lid opening 330.
[0055] The suitcase 10 includes a base comprising a base surface 240 of a body 200, a base surface 340 of a cover 300, and a plurality of wheel assemblies 242, 244, 342, and 344. The body 200 includes a first pair of wheel assemblies 242 and 244, while the cover 300 includes a second pair of wheel assemblies 342 and 344. Each wheel assembly includes a pair of parallel wheels located on either side of a stem, which is attached to the body 200 or cover 300 of the suitcase 10 via the stem. Wheel assemblies 242, 244, 342, and 344 are all located on a surface of the suitcase perpendicular to the axis of hinge 110.
[0056] The suitcase 10 also includes a top, which includes a top surface 250 of the body 200, a top surface 350 of the lid 300, and a top handle 255.
[0057] The body 200 also includes a telescopic handle 290 that is accommodated in an opening 292 in the top surface 250 of the body 200 and extends telescopically to protrude above the body 200 (opposite to the wheel assemblies 242, 244, 342, 344) for moving the suitcase 10 on its wheels.
[0058] The main body 200 also includes a strap assembly 280 configured to provide a securing function for items stored in the main body 200. The strap assembly 280 includes a pair of straps 281, 282 and a fastening buckle 283 configured to secure the pair of straps 281, 282 to each other. The strap assembly 280 may be flexible.
[0059] The suitcase 10 also includes a first side, which includes a first side surface 260 of the body 200, a first side surface of the cover 300, and a side handle 265.
[0060] The suitcase 10 also includes a second side portion, which includes a second side surface 270 of the body 200, a second side surface 370 of the cover 300, and a hinge 110 located between the body 200 and the cover 300 for moving the cover 300 relative to the body 200.
[0061] The second side surface 270 of the main body may include a pair of feet 271, 272, and the second side surface 370 of the lid 300 may include a pair of feet 371, 372. When the suitcase is closed and placed with its second side facing down (i.e., side handle 265 facing up), the feet 271, 272, 371, 372 contribute to the stability of the suitcase. Furthermore, in this way, the suitcase can be stored vertically, but the wheels are not on the bottom, meaning the suitcase can be stored upright without the risk of rolling.
[0062] Suitcase 10 has an opening position (such as...) Figure 3 As shown), in this open position, the main body receiving volume can enter through the main body opening 230, and the cover receiving volume can enter through the first cover opening 330.
[0063] Suitcase 10 also has a closing position ( Figure 1 and Figure 2 In the closed position, the main body opening 230 engages with the first cover opening 330, such that the main body opening 230 is closed by the cover 200, and the first cover opening 330 is closed by the main body 200.
[0064] The suitcase 10 also includes a lid partition 380, which has an unfolded configuration and a non-folded configuration (such as...). Figure 3 As shown), in the unfolded configuration, the cover partition 380 closes the first cover opening 330, and in the closed configuration, the cover partition 380 allows access through the first cover opening 330.
[0065] The cover partition 380 is non-releasably attached to a second side surface 370 adjacent to the cover 300 and parallel to the hinge 110, and releasably attached to a base surface 340 adjacent to the cover, a first side surface 360 adjacent to the cover, and a top surface 350 adjacent to the cover. The releasable attachment is conventionally provided by a zipper (not shown) that allows the cover partition 380 to be releasably secured to the base surface 340, the first side surface 360, and the top surface 250 adjacent to the cover. In this way, when the cover partition 380 is in the unfolded configuration, the cover opening 330 is completely closed by the cover partition 380.
[0066] Unlike the strap assembly 280, which may occupy a small portion of the area of the main opening 230, the cover partition 380 may occupy the entire area of the cover opening 330. Unlike the strap assembly 280, which may be elastic, the cover partition 380 may be inelastic.
[0067] Figures 4 to 9 A suitcase 100 according to an embodiment of the present disclosure is shown. The suitcase 100 of the illustrated embodiment is similar to... Figures 1 to 3 The illustrated suitcase 100 is similar to the prior art suitcase 10. The features of the suitcase 100 in the illustrated embodiment are similar to... Figures 1 to 3 In cases where the features of the suitcase 10 are the same, the same reference numerals are used.
[0068] Figure 4 The illustrated embodiment shows a suitcase 100 in a first orientation with the wheels facing down, suitable for transporting the suitcase 100. Figure 5 The illustrated embodiment of the suitcase 100 is in a second orientation with the wheels facing the side, suitable for packing the suitcase 100.
[0069] The suitcase 100 of the illustrated embodiment has a closed position, a main open position (similar to the open position of the prior art suitcase 10), and a secondary open position, such as... Figure 5 As shown.
[0070] The secondary open position is achieved through an additional second cover opening 390 in the concave cover housing 300 to provide access to the cover-accommodating volume in the closed position. The second cover opening 390 may occupy most or all of the main cover surface 320. The cover body 300 also includes a cover plate 392, which is hingedly attached to the second side surface 370 of the cover body 300 via a cover plate hinge 394 and is configured to close the entire second cover opening 390. A cover plate zipper (not shown) is provided around the periphery of the cover plate 392 between one end of the cover plate hinge 394 and the other end of the cover plate hinge 394.
[0071] In this way, when the cover zipper is open, the cover 392 can be opened via the cover hinge 394 (see...). Figure 5 ), to expose the passageway to the internal volume of the cover 300. When the cover zipper is closed (e.g. Figure 4 As shown), cover plate 392 seals the second cover opening 390, thereby preventing the internal volume of cover body 300 from entering through the second cover opening 390.
[0072] Therefore, in the secondary opening position, the entire internal volume of the suitcase (including the main body volume and the lid volume) can be accessed as a single volume through the second lid opening 390. This can be useful for packing large items that cannot be contained only in the main body 200 or only in the lid 300.
[0073] Reference Figure 5 The luggage compartment in the illustrated embodiment also includes a lid partition 381, which has a... Figure 3 The cover plate 380 shown has a similar function, but its construction is similar. Figure 3 The lid partition 380 is different. Specifically, although the lid partition 381 of the suitcase 100 is non-releasably attached to the lid 300 only on one side adjacent to the first lid opening 320, the attached side is not like... Figure 3 That is parallel to hinge 110. Instead, cover partition 381 is attached to the side of the first cover opening 320 opposite to the wheel assemblies 242, 244, 342, 344 of the luggage compartment.
[0074] In the prior art, the lid partition 380 of the luggage 10 is non-releasably attached to the second side surface 370 adjacent to the lid 300 and parallel to the hinge 110, while in the luggage 100 of the illustrated embodiment, the lid partition 381 is non-releasably attached to the top surface 350 adjacent to the lid 300. The lid partition 381 is releasably attached to the first side surface 360, the base surface 340, and the second side surface 370 adjacent to the lid. In this way, when the lid partition 381 is in the unfolded configuration, the lid opening 320 is completely closed by the lid partition 381. When the lid partition is in the closed configuration, the lid partition 381 is adjacent to the top surface 350 of the lid 300.
[0075] In the undeployed configuration, the cover partition 381 can be rolled up and stored at the top surface 350 adjacent to the cover body 300 by means of hook and loop fasteners 382, 383. The hook element 382 and loop element 383 of the hook and loop fasteners 382, 383 are shown in... Figure 6a and Figure 6b In the middle, a ring element 383 is disposed on one side of the cover partition 381, while a hook element 382 is disposed at the distal end of a tag 384 suspended near the proximate top surface 350. The tag 384 is long enough to wrap around the cover partition 381 when it is rolled up, such that the hook element 382 on the tag 384 reaches the ring element 383 on the cover partition 381, thereby holding the cover partition 381 in its unfurled configuration.
[0076] Figure 5 The luggage compartment 100 is shown in its secondary open position (with the lid 392 open) and the lid partition 381 in an unopened configuration. In this way, not only the lid-containing volume can be accessed through the second lid opening 390, but the main body-containing volume can also be accessed through the second lid opening 390.
[0077] Figure 6a The suitcase 100 is shown in its secondary open position, but the lid partition 381 is open, so that only the lid-containing volume can be accessed through the second lid opening 390, while the main body-containing volume cannot be accessed.
[0078] Figure 6b The illustration shows the suitcase 100 in its main open position, with the lid 392 in its unfolded configuration. Therefore, the lid-accommodating volume is inaccessible, but the main body-accommodating volume is accessible.
[0079] Figure 7 , Figure 8 and Figure 9 It is shown that by using a tag 384 to secure the hook element 382 on the tag 384 to the ring element 383 on the cover partition 381, the cover partition 381 is rolled up and held in a sequence of unfurled configuration.
[0080] Compared to the existing luggage 10, the additional opening options of the luggage 100 of the illustrated embodiment offer considerable flexibility.
[0081] Although Figure 6b It demonstrates the same level of accessibility as existing technology suitcases 10, but... Figure 6a An alternative configuration is shown, in which the cover-accommodating volume is accessible, but the main body-accommodating volume is inaccessible. This accessible / inaccessible combination... Figures 1 to 3 This is completely impossible in existing technology suitcases. Furthermore, users have two options for simultaneously accessing both the main body and lid storage volumes, such as... Figure 5 As shown (accessed via the secondary opening position) and Figure 9 As shown (once the cover 381 is opened, access is made through the main opening position).
[0082] The additional flexibility brings a number of further advantages. One advantage is that it is possible to (a) enter only the main body receiving volume without entering the lid receiving volume, (b) enter only the lid receiving volume without entering the main body receiving volume, (c) enter both the main body receiving volume and the lid receiving volume separately (when in the main open position), and (d) enter both the main body receiving volume and the lid receiving volume simultaneously (when in the secondary open position). This provides the user with considerable additional flexibility.
[0083] For example, if a user's trip is divided into two phases, each requiring different items to be packed in their suitcase, then, for instance, the items needed for the first phase can be packed only in the lid compartment, and the items needed for the second phase only in the main compartment. The user can access all the items needed for the first phase from the lid compartment using only the secondary opening position. Subsequently, in the second phase of the trip, the user can access all the items stored in the main compartment using the main opening position, while keeping the lid partition 381 in the unfolded configuration, thus making the items in the lid compartment used in the first phase of the trip unavailable.
[0084] Furthermore, achieving the secondary open position when the suitcase is in the first orientation (i.e., wheels facing down when used for travel) is much more feasible. This is because, in the secondary open position relative to the closed position, the positions of the first pair of wheel assemblies 242, 244 relative to the second pair of wheel assemblies 342, 344 remain unchanged. In contrast, the open position of the prior art suitcase 10 (corresponding to the main open position of the suitcase 100 of the illustrated embodiment) means that the first and second pairs of wheel assemblies 242, 244, 342, 344 are oriented along a single axis, resulting in significantly reduced stability, especially in the direction perpendicular to this single axis. The suitcase 100 of this disclosure offers considerable convenience in accessing items inside during travel due to its enhanced stability. With the prior art, opening the suitcase in the first (travel) orientation is difficult and carries the risk of (i) the suitcase tipping over; and / or (ii) items falling out. In contrast, for the suitcase of the illustrated embodiment, the suitcase can be opened in the secondary opening position in the first (travel) orientation, (i) reducing the risk of the suitcase tipping over; and (ii) reducing the risk of items falling out, because when the cover partition 381 is in the unfolded configuration, the items in the main body containing volume are held inside by the cover partition 381.
[0085] Another advantage is that it is easier to pack large items into the suitcase that cannot be accommodated in the main body 200 or the lid 300 alone. Specifically, in the second opening configuration, the combined volume of the main body and the lid can be entered as a single volume (instead of as two separate volumes as in the main opening configuration).
[0086] The scope of this disclosure is not limited to the embodiments shown. Variations within the scope of the claims are contemplated. For example, the suitcase may further include a second body opening (not shown) that may occupy most or all of the main surface 320 of the body. The body 200 may further include a body piece hingedly attached to a second side surface 270 of the body 200 via a body piece hinge and configured to close the second body opening integrally. A body piece zipper may be provided around the periphery of the body piece between one end of the body piece hinge and the other end of the body piece hinge. Thus, a third open position of the suitcase is provided, in which the body piece is in an open position, allowing the body-accommodating volume to be accessed through the second body opening.
Claims
1. A type of luggage item, comprising: The main body includes a concave main body shell, the concave main body shell having a main body surface and an interior, the interior defining a main body accommodating volume, the main body accommodating volume being accessible through a main body opening opposite to the main body surface; A cover body, the cover body including a concave cover shell having a main cover surface and an interior, the interior defining a cover receiving volume, the cover receiving volume being accessible through a first cover opening opposite to the main cover surface; The base includes the base surface of the main body, the base surface of the cover, and multiple wheel assemblies; The top, which is opposite to the base, includes the top surface of the main body, the top surface of the cover, and a top handle; The first side portion includes a first side surface of the main body, a first side surface of the cover, and a side handle; The second side portion includes a second side surface of the body, a second side surface of the cover, and a hinge located between the body and the cover, the hinge being used to move the cover relative to the body between the following positions: In the main open position, the main body accommodating volume can enter through the main body opening, and the cover accommodating volume can enter through the first cover opening; as well as In the closed position, the main body opening engages with the first cover opening, such that the main body opening is closed by the cover and the first cover opening is closed by the main body. The cover also includes: A cover partition extending from the interior of the top surface of the cover body, the cover partition having an unfolded configuration and a closed configuration, wherein in the unfolded configuration the cover partition closes the first cover opening, and in the closed configuration the cover partition allows entry through the first cover opening; and A second cover opening is provided in the concave cover housing to provide a secondary open position so as to allow access to the cover receiving volume when the cover body is in the closed position relative to the body.
2. The baggage and articles according to claim 1, wherein, The main surface of the cover includes the second cover opening.
3. The baggage items according to claim 1 or 2, wherein, The cover also includes a cover plate, the cover plate having: In the open position of the cover, the second cover opening allows access to the cover-accommodating volume; as well as In the closed position of the cover, the second cover opening is closed by the cover.
4. The luggage item according to claim 3, further comprising a cover zipper disposed around the periphery of the cover for releasably retaining the cover in the closed position.
5. The baggage items according to claim 3 or 4, wherein, The cover is hingedly attached to the second side surface of the cover body via a cover hinge.
6. The baggage articles according to claim 5 when subordinate to claim 4, wherein, The cover zipper extends between one end of the cover hinge and the other end of the cover hinge.
7. The baggage article according to any of the preceding claims further includes a cover partition having an unfolded configuration and a non-unfolded configuration, wherein in the unfolded configuration the cover partition closes the first cover opening, and in the non-unfolded configuration the cover partition allows entry through the first cover opening.
8. The baggage and articles according to claim 7, wherein, The cover partition is attached to the top surface of the cover body.
9. The baggage and articles according to claim 8, wherein, The cover partition is releasably attached to a first side surface adjacent to the cover, a base surface adjacent to the cover, and a second side surface adjacent to the cover.
10. The baggage and articles according to claim 9, wherein, The cover partition is releasably attached to a first side surface adjacent to the cover, a base surface adjacent to the cover, and a second side surface adjacent to the cover via a cover partition zipper.
11. The luggage item according to any one of claims 7-10, further comprising a tag suspended near the top surface of the cover, including a first fastening element, and wherein the cover partition includes a second fastening element, wherein the first fastening element and the second fastening element are configured to cooperate with each other such that the cover partition can be held by the tag.
12. The baggage and articles according to claim 11, wherein, The first fastening element and the second fastening element include a hook fastening element and a ring fastening element.
13. The baggage article according to any of the preceding claims further includes a second body opening, the second body opening occupying most or all of the main surface of the body.
14. The luggage item of claim 13, further comprising a body piece hingedly attached to a second side surface of the body via a body piece hinge and configured to close the second body opening integrally, and optionally including a body piece zipper disposed around the periphery of the body piece between one end of the body piece hinge and the other end of the body piece hinge.
15. The luggage item according to claim 13 or 14, further comprising a main body partition having an unfolded configuration and a non-unfolded configuration, wherein in the unfolded configuration the main body partition closes the first main body opening, and in the non-unfolded configuration the main body partition allows entry through the first main body opening.