Luggage case with expandable capacity

Abstract

The utility model relates to the field of travel equipment, in particular to a sliding mechanism of a luggage case. The concrete structure comprises an upper box body and a lower box body, and the upper box body and the lower box body are installed in a relative sliding mode. According to the specific improved structure, the side, facing the second side box body, of the first upper frame and the side, facing the second side box body, of the first lower frame are aligned, the first sliding rail is arranged in the space of the other side, away from the second side box body, of the second upper frame and the side, facing the first side box body, of the second lower frame are aligned; the second sliding rail is arranged in the space of the other side, away from the first side box body, of the first side box body. The sliding rail is arranged in the frame, the frame is of an aligned structure, the frame can protect and support the sliding rail, the sliding rail is prevented from being deformed due to external force in the use process, and the use experience and the service life of the product are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of travel equipment, and in particular to a suitcase with expandable capacity. Background Technology

[0002] The retractable design concept offers great convenience to travelers, especially when adapting to different travel needs, as the ability to flexibly adjust the size of the suitcase is crucial. However, turning this innovative concept into a practical product has encountered numerous technical bottlenecks, particularly regarding the stability and durability of the structural design.

[0003] Firstly, while the longitudinal or lateral telescopic structural design seems simple and intuitive in theory, ensuring the smooth operation of the sliding rail system is a significant challenge in practice. Traditional sliding rail designs are often based on a fixed-size and shaped suitcase. However, in telescopic suitcases, changes in the suitcase's dimensions directly affect the installation accuracy and stress state of the sliding rail. Even slight deformation of the suitcase during extension or retraction can lead to rail jamming, increased noise, or even damage. This not only affects the user experience but also significantly reduces the product's reliability and lifespan. Examples of longitudinal telescopic structures include Chinese patent CN220800314U (telescopic suitcase), CN210018158U (a variable-capacity suitcase), CN209983642U (telescopic suitcase), and international patent application PCT / IB2020 / 050406 (expandable trolley suitcase). Examples of lateral telescopic structures include Chinese patent CN112806685A (variable-volume suitcase). These structures use a box as a telescopic mechanism or have a telescopic mechanism installed on the box. Deformation of the box during use will affect the smoothness of sliding.

[0004] Secondly, material selection is also a key factor restricting the commercialization of retractable suitcases. Ensuring structural strength during retraction while maintaining lightweight design for easy carrying places extremely high demands on materials. Traditional materials often struggle to simultaneously meet both strength and deformation control standards. While new composite materials can partially solve these problems, their cost and processing difficulty increase accordingly. For example, the CN209931718U multi-functional suitcase, CN209677636U suitcase, and the German patent DE202018106409U1 wheeled suitcase all feature multi-rail structures. These structures place high demands on the materials used in the suitcase body, as any deformation of the body can affect the smoothness of retraction.

[0005] Furthermore, sealing and waterproofing are also crucial considerations in the design of retractable suitcases. Maintaining a tight seal at the opening to prevent rainwater and dust from entering the suitcase as it expands and contracts presents a significant technical challenge. Traditional sealing methods are inadequate for dynamically changing suitcase dimensions, necessitating the development of more flexible and effective sealing mechanisms. Adopting a top-heavy, bottom-light structure can improve sealing and waterproofing to some extent, as exemplified by the retractable suitcase in Chinese patent CN109393695A. Another advantage of this design is its split-opening structure, which greatly enhances usability. However, its drawback lies in placing the sliding rails near the opening of the split-opening structure. Since the opening is a vulnerable area for deformation, and the sliding rails have no external support, deformation remains a concern.

[0006] In addition, ease of use and safety are also factors that must be considered in product design. How to ensure structural complexity while allowing users to easily and safely perform the extension and retraction of the enclosure, avoiding damage or injury caused by misoperation, is a problem that designers need to carefully weigh.

[0007] A more feasible solution is the frame structure and suitcase described in Chinese patent CN210783259U, which integrates the sliding mechanism with the frame into a single unit. Figure 1 As shown, outer frame members 111 and 112 are provided with sliding grooves 113 and 114, and inner frame members 121 and 122 are provided with protrusions 123 and 124. The protrusions 123 and 124 slide within the sliding grooves 113 and 114, achieving a sliding fit between the inner frame members 121 and 122 and the outer frame members 111 and 112. In this design, the frame provides sufficient support for the sliding mechanism, preventing deformation. The drawback of this design is the complex structure of the frame, resulting in high manufacturing costs. More importantly, this structure has a significant flaw: when the inner frame members 121 and 122 slide relative to the outer frame members 111 and 112, increasing the luggage's capacity, the inner frame members 121 and 122 slide out from within the outer frame members 111 and 112, losing their support. As can be seen from the figure, the inner frame members 121 and 122 are separated, with a gap d'. The gap d' will cause the lower box to not be completely sealed, or it will be necessary to use box material for sealing. Even so, the existence of the gap d' will still cause the inner frame parts 121 and 122 to deform differently under external pressure during use.

[0008] In conclusion, although the concept of expandable capacity suitcases has been around for a long time, the technical challenges in structural design, material selection, sealing performance, and user operation have prevented this innovative concept from being widely commercialized. Utility Model Content

[0009] The purpose of this solution is to overcome the shortcomings or defects in the existing technology and provide a sliding, stable, and expandable capacity suitcase.

[0010] This plan achieves the above objectives through the following methods.

[0011] This solution provides a luggage with expandable capacity, comprising an upper body and a lower body, which are slidably installed relative to each other. The upper body includes a first upper shell and a second upper shell, and the lower body includes a first lower shell and a second lower shell. The first upper shell has a first upper frame at its opening edge, the second upper shell has a second upper frame at its opening edge, the first lower shell has a first lower frame at its opening edge, and the second lower shell has a second lower frame at its opening edge. A first slide rail is provided between the first upper frame and the first lower frame along the direction in which the upper and lower bodies slide relative to each other, and a second slide rail is provided between the second upper frame and the second lower frame. The first upper shell and the first lower shell are slidably connected relative to each other via the first slide rail to form a first side body, and the second upper shell and the second lower shell are slidably connected relative to each other via the second slide rail to form a second side body. The first side body and the second side body are connected on one side by a connecting mechanism to form a rotatable whole, and the other side is opened and closed relative to each other, allowing the first side body and the second side body to have an unfolded state and a closed state. In the closed state, the interior of the first side body and the second side body forms a storage space. The specific improved structure is as follows: the first upper frame and the first lower frame are aligned on the side facing the second side box, the first slide rail is set in the space on the other side away from the second side box, the second upper frame and the second lower frame are aligned on the side facing the first side box, and the second slide rail is set in the space on the other side away from the first side box.

[0012] The sliding mechanism involved in this solution has the slide rail located inside the frame. Since the frame supports the shape of the suitcase and is made of metal or high-strength materials, it is not easily deformed. Therefore, the frame plays a role in supporting and protecting the slide rail, preventing deformation of other parts of the suitcase, such as the suitcase body, from affecting the slide rail during use, and ensuring smooth sliding. On the other hand, the slide rail and frame are independent components. Compared with the existing technology where the slide rail serves as both the frame and the sliding mechanism, the edges of the upper and lower frames remain aligned regardless of how the suitcase is extended or retracted. After the suitcase body is closed, the two side frames can support each other, ensuring that the installation position of the slide rail is not affected by external forces and that the slide rail is not deformed, thus ensuring smooth sliding. Furthermore, when the sliding ability of the slide rail is not affected by the suitcase body and its materials, the selection of shell materials constituting the suitcase body is expanded. For example, fabric, plastic, or thin metal can be used. In traditional telescopic suitcases, these materials are not recommended due to their susceptibility to deformation. One side of the two boxes can be connected to form a rotatable whole by a rotating mechanism or flexible sheet, while the other side can be equipped with a locking mechanism or sealed using traditional structures such as zippers.

[0013] To improve the overall strength of the housing, a reinforcing structure is added based on the above. This solution further includes: a first upper opening frame and a first lower opening frame on the mating side of the first upper shell and the first lower shell; and a second upper opening frame and a second lower opening frame on the mating side of the second upper shell and the second lower shell. The first upper opening frame is connected to the first upper frame, the second upper opening frame is connected to the second upper frame, the first lower opening frame is connected to the first lower frame, and the second lower opening frame is connected to the second lower frame. The opening frames are preferably made of the same material as the frames, and are also required to have high strength and be resistant to deformation, ensuring the shape of the upper and lower housings at the joint and providing further support for the shell material. Providing opening frames at the edge where the upper and lower housings are nested ensures that the interface does not deform during relative sliding, guaranteeing smooth sliding.

[0014] To further improve the stability of the relative sliding of the upper and lower housings, the first upper opening frame is connected to the end of the first upper side frame, and the second upper opening frame is connected to the end of the second upper side frame. The first lower side frame extends beyond the first lower housing and the first lower opening frame to form a first extension section facing the upper housing, and the second lower side frame extends beyond the second lower housing and the second lower opening frame to form a second extension section facing the upper housing. The function of the extension section is to protect the internal slide rail when the housing is adjusted to its maximum capacity, preventing excessive force from directly acting on the slide rail during use. Depending on the capacity of the housing, the lengths of the first and second extension sections are between 2-15cm, preferably equal in length.

[0015] The preferred design is a nested structure where the upper housing is larger than the lower housing. The upper housing has a larger cross-sectional area than the lower housing and is slidably mounted on the lower housing. The area enclosed by the first upper opening frame and the second upper opening frame is larger than the area enclosed by the first lower opening frame and the second lower opening frame. The first lower opening frame and the second lower opening frame protrude from the surfaces of the first lower housing and the second lower housing.

[0016] Since the upper and lower housings are not sealed, and a structure that is wider at the top and narrower at the bottom is adopted, this can prevent water or dust from entering the containment space to a certain extent. To further improve the sealing performance, the first and second upper opening frames are provided with flanges facing the first and second lower housings. These flanges can further prevent dust and water from entering the containment space.

[0017] Since the sliding mating housing structure is composed of multiple components, there are certain installation errors between these components. These errors can cause changes in the installation accuracy of the slide rails during the opening and closing of the housing. Therefore, this solution further provides a closing positioning mechanism between the first and second upper frame sides, and between the first and second lower frame sides. In the closed state, the closing positioning mechanism restricts the alignment of the first and second slide rails. By using the positioning mechanism on the frame sides, it can be ensured that the first and second slide rails can be aligned horizontally when the housing is closed, thus preventing damage to the slide rails during the sliding of the housing.

[0018] Specifically, the closing positioning mechanism includes wedge-shaped positioning grooves on the first upper and lower frame sides, and wedge-shaped positioning strips on the second upper and lower frame sides. In the closed state, the wedge-shaped positioning strips are embedded in the wedge-shaped positioning grooves. The wedge-shaped positioning grooves and strips, working together, can maximize the tolerance for deformation of the enclosure, making it particularly suitable for non-rigid enclosures, such as those made of fabric or plastic. Even if there is some misalignment when the two sides of the enclosure are opened, the wedge-shaped positioning grooves and strips, during the closing process, can at least pull the two side frames back to their initial positions, thus ensuring the alignment of the slide rails.

[0019] The design can be further improved. The wedge-shaped positioning groove consists of a first inner inclined surface near the storage space and a second inner inclined surface away from the storage space. The slope of the first inner inclined surface is smaller than that of the second inner inclined surface. The first inner inclined surface faces the receiving space of the box, and the second inner inclined surface faces the outer side of the box. This asymmetrical structure can simultaneously meet the requirements of accuracy and tolerance. The outer inclined surface has a larger slope, which ensures the alignment of the slide rail when the lid is closed. The inner inclined surface has a smaller slope, which ensures smooth locking when the lid is closed even if the box undergoes some expansion or contraction deformation.

[0020] Furthermore, the wedge-shaped positioning strip can be further improved by having a first outer bevel near the storage space and a second outer bevel away from the storage space. An opening groove is provided on the second outer bevel, and the opening width D of the opening groove is greater than the edge width d of the wedge-shaped positioning groove on the side away from the storage space. One side of the two opening boxes is hinged by a pivot mechanism to allow rotation, while the other side is generally equipped with a locking mechanism. On the hinged side, when the two boxes rotate to open, the edges are restricted by the rigid pivot mechanism, causing interference and limiting the opening angle. To increase the relative opening angle of the two boxes, especially to maximize the opening angle to a flat position (180°), an opening groove is provided to avoid the edge of the other box, allowing the edge of the other side's frame to fit into the opening groove after rotation, thereby maximizing the opening angle.

[0021] During use, the housing inevitably undergoes some deformation, such as from collisions during transportation, loading heavy objects, or uneven filling. Therefore, using precision-fitted slide rails would be insufficient to meet these requirements, as even slight deformation could prevent smooth sliding. Thus, as a preferred solution, the first and second slide rails have a floating fit clearance on a plane perpendicular to the relative sliding direction of the housing and lower housing. The floating range Δ of this clearance is between 0.1mm and 2mm. Unlike traditional product designs that prioritize precision fit, this floating fit clearance not only protects the slide rails and extends their lifespan but also allows for a reduction in the assembly precision requirements of other structures, resulting in better industrial feasibility. Although the clearance fit may slightly degrade the user experience, when both housings are in the closed rotation state, the housing and slide rails are restricted by the closed positioning mechanism of the frame. The relative sliding between the wedge-shaped positioning groove and the wedge-shaped positioning strip compensates for the reduced user experience caused by the clearance fit, thus balancing factors such as product lifespan, production efficiency, yield, and user experience.

[0022] As a preferred structure for a stable and simple floating slide rail, both the first and second slide rails consist of nested inner and outer slide rails. The inner slide rail is confined to sliding within the outer slide rail. In a plane perpendicular to the sliding direction, the outer and inner slide rails have a lateral clearance Δ1 and a longitudinal clearance Δ2. These mutually perpendicular clearances Δ1 and Δ2 together constitute the floating clearance. Achieving floating clearance by setting clearances in both the lateral and longitudinal directions between the inner and outer slide rails is a preferred method for controlling the floating range, especially for profile slide rail structures. This overcomes the poor user experience of profile slide rails and reduces manufacturing costs.

[0023] As described above, the split-type two-sided housing also includes a connecting mechanism connecting the first and second side frames, allowing them to open and close relative to each other. The connecting mechanism includes an upper rotating shaft mechanism connecting the first and second upper housings and a lower rotating shaft mechanism connecting the first and second lower housings. The installation distance Δd between the rotation axes of the upper and lower rotating shaft mechanisms is not greater than the floating fit clearance. Because the upper and lower housings are of different sizes, the mounting reference planes of the upper and lower rotating shaft mechanisms cannot be the same plane. This results in the upper and lower housings not rotating coaxially during opening and closing. Although the axis positions of the upper and lower rotating shaft mechanisms are not significantly different—generally just the difference between the upper and lower housings, i.e., the thickness of the housing sidewalls—the rotating shaft mechanism is a precision-fitted component. After repeated use, non-coaxial rotation will cause some deformation. Therefore, this solution sets a floating fit clearance on the first and second slide rails. This allows the upper and lower frames to be non-tightly fitted during opening and closing, without mutually restricting each other. This prevents internal compressive stress on the non-coaxial rotation, ensuring the service life of the rotating shaft mechanism.

[0024] The advantages of this solution are that the slide rail is located within the frame, and the frame adopts an aligned structure. The frame provides protection and support for the slide rail, preventing deformation due to external forces during use and ensuring a good user experience and product lifespan. Through floating clearance fit and the coordination of the positioning mechanism, the cabinet has a certain tolerance during relative sliding and opening, and high alignment accuracy after closing. The fitting accuracy between various components can be switched according to different usage scenarios. Further strengthening the frame's strength and sealing performance reduces the requirements for cabinet materials, allowing for a wider range of material choices and product diversification. In summary, these advantages of this solution compared to existing technologies enable its productization and industrialization. Products manufactured based on this solution will not increase costs and possess a competitive advantage. Attached Figure Description

[0025] Figure 1 This is a diagram illustrating the background technology structure.

[0026] Figure 2 This is a schematic diagram of the structure of an embodiment.

[0027] Figure 3 for Figure 2 Structural assembly diagram.

[0028] Figure 4 This is a schematic diagram of the sliding mechanism in the embodiment.

[0029] Figure 5 for Figure 2 A schematic diagram of the structure in its unfolded state.

[0030] Figure 6 for Figure 5 A first-person view of the structural assembly diagram.

[0031] Figure 7 for Figure 5 The second-view structural assembly diagram.

[0032] Figure 8 for Figure 4 The structure explodes.

[0033] Figure 9 for Figure 2 A longitudinal sectional view of the front view.

[0034] Figure 10 for Figure 9 A cross-sectional view of plane AA.

[0035] Figure 11 for Figure 10 A magnified view of part I.

[0036] Figure 12 for Figure 10 A magnified view of part II.

[0037] Figure 13 for Figure 2 A schematic diagram of the horizontal section of the front view.

[0038] Figure 14 for Figure 13 A cross-sectional view of the BB plane.

[0039] Figure 15 for Figure 14 A magnified view of a section of section III.

[0040] Figure 16 for Figure 14 A magnified view of a portion of IV.

[0041] Figure 17 This is a schematic diagram of the wedge-shaped positioning groove.

[0042] Figure 18 This is a schematic diagram of the wedge-shaped positioning strip.

[0043] Figure 19 This is a structural view of the rotational fit between the wedge-shaped positioning groove and the wedge-shaped positioning strip.

[0044] Figure 20 This is a schematic diagram showing the alignment of the wedge-shaped positioning grooves of the first upper border and the first lower border.

[0045] Figure 21 This is a schematic diagram showing the alignment of the wedge-shaped positioning strips of the second upper border and the second lower border.

[0046] Figure 22 This is a schematic diagram of the slide rail structure.

[0047] Figure 23 for Figure 2 Another perspective diagram.

[0048] Figure 24 for Figure 23 A schematic diagram of the horizontal section of the front view.

[0049] Figure 25 for Figure 24 A cross-sectional view of the C-plane.

[0050] Figure 26 for Figure 25 A magnified view of a portion of the V-shape. Detailed Implementation

[0051] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this invention. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0052] like Figure 2 The embodiment of this utility model shown is specifically a suitcase with expandable capacity. As can be seen from the figure, the suitcase includes an upper body 100 and a lower body 200. The upper body 100 and the lower body 200 can be slidably installed relative to each other vertically, and can be fixed in a specific position to adjust the internal storage space of the suitcase. Further combined with... Figure 3 As can be seen, the upper housing 100 includes a first upper shell 110 and a second upper shell 120, and the lower housing 200 includes a first lower shell 210 and a second lower shell 220. The first upper shell 110 has a first upper frame 310 at its opening edge, the second upper shell 120 has a second upper frame 320 at its opening edge, the first lower shell 210 has a first lower frame 330 at its opening edge, and the second lower shell 220 has a second lower frame 340 at its opening edge.

[0053] along Figure 2 The upper housing 100 and the lower housing 200 shown slide relative to each other in the direction shown. The sliding mechanism alone is as follows: Figure 4 As shown, a first slide rail 410 is provided between the first upper frame 310 and the first lower frame 330, and a second slide rail 420 is provided between the second upper frame 320 and the second lower frame 340. Further combined... Figure 5 , Figure 6 and Figure 7As can be seen, the first upper shell 110 and the first lower shell 210 are slidably connected relative to each other via the first slide rails 410 on both sides to form a first side box 510, and the second upper shell 120 and the second lower shell 220 are slidably connected relative to each other via the second slide rails 420 on both sides to form a second side box 520. The first side box 510 and the second side box 520 are connected on one side by a connecting mechanism 600 to form a relatively rotatable whole, and the other side can be opened and closed relative to each other, so that the first side box 510 and the second side box 520 have an unfolded state and a closed state. Figure 2 As shown, in the closed state, the two side boxes are locked by the locking mechanism, and the interior of the first side box 510 and the second side box 520 forms a storage space.

[0054] The specific composition of the sliding mechanism Figure 4 and Figure 8 As shown, a first upper opening frame 910 and a first lower opening frame 930 are provided on the mating side of the first upper housing 110 and the first lower housing 210, and a second upper opening frame 920 and a second lower opening frame 940 are provided on the mating side of the second upper housing 120 and the second lower housing 220. The first upper opening frame 910 is connected to the first upper frame 310, the second upper opening frame 920 is connected to the second upper frame 320, the first lower opening frame 930 is connected to the first lower frame 330, and the second lower opening frame 940 is connected to the second lower frame 340. The first lower frame 330 extends beyond the first lower housing 210 and the first lower opening frame 930 to form a first extension section 331 facing the upper housing 100, and the second lower frame 340 extends beyond the second lower housing 220 and the second lower opening frame 940 to form a second extension section 341 facing the upper housing 100. The lengths of the first extension section 331 and the second extension section 341 are between 2 and 15 cm.

[0055] from Figure 9 and Figure 10 It can be seen that the cross-sectional area of ​​the upper box 100 is larger than that of the lower box 200, and it is slidably installed on the lower box 200. The area enclosed by the first upper opening frame 910 and the second upper opening frame 920 is larger than the area enclosed by the first lower opening frame 930 and the second lower opening frame 940. Figure 11 and Figure 12 The first lower opening frame 930 and the second lower opening frame 940 protrude from the surfaces of the first lower housing 210 and the second lower housing 220. The first upper opening frame 910 and the second upper opening frame 920 are provided with flanges 911 and 921 facing the first lower housing 210 and the second lower housing 220.

[0056] from Figure 13 and Figure 14As can be seen, a closing positioning mechanism 700 is provided between the first upper frame 310 and the second upper frame 320, and between the first lower frame 330 and the second lower frame 340. In the closed state, the closing positioning mechanism 700 restricts the alignment of the first slide rail 410 and the second slide rail 420. The closing positioning mechanism 700 is specifically as follows... Figure 15 and 16 As shown, the structure includes wedge-shaped positioning grooves 710 disposed on the first upper frame 310 and the first lower frame 330, and wedge-shaped positioning strips 720 disposed on the second upper frame 320 and the second lower frame 340. In the closed state, the wedge-shaped positioning strips 720 are embedded in the wedge-shaped positioning grooves 710. Further detailed structural references are available. Figure 17 and Figure 18 The wedge-shaped positioning groove 710 is composed of a first inner inclined surface 711 near the storage space and a second inner inclined surface 712 away from the storage space. The slope of the first inner inclined surface 711 is less than that of the second inner inclined surface 712, i.e., the inclination angle α1 is less than α2. The wedge-shaped positioning strip 720 has a first outer inclined surface 721 near the storage space and a second outer inclined surface 722 away from the storage space. The second outer inclined surface 722 is provided with an opening groove 723. The opening width D of the opening groove 723 is greater than the edge width d of the wedge-shaped positioning groove 710 on the side away from the storage space. In this way, during the rotation of the connecting mechanism 600 of the suitcase, the wedge-shaped positioning strip 720 and the wedge-shaped positioning groove 710 will not interfere, as shown in Figure 19.

[0057] Compared to the prior art, one important improvement of this embodiment is as follows: Figure 20 and 21 As shown, the first upper frame 310 and the first lower frame 330 are aligned on the side facing the second side housing 520, and the first slide rail 410 is disposed in the space on the other side away from the second side housing 520, that is, the wedge-shaped positioning grooves 710 are aligned. The second upper frame 320 and the second lower frame 340 are aligned on the side facing the first side housing 510, and the second slide rail 420 is disposed in the space on the other side away from the first side housing 510, that is, the wedge-shaped positioning strips 720 are aligned. In this way, no matter which position the upper housing 100 and the lower housing 200 slide to, in the closed state, the fitting precision between the wedge-shaped positioning grooves 710 and the wedge-shaped positioning strips 720 remains unchanged, and they can support each other, thereby ensuring that the sliding of the first slide rail 410 and the second slide rail 420 is not affected.

[0058] On a plane perpendicular to the relative sliding direction of the housing 100 and the lower housing 200, the first slide rail 410 and the second slide rail 420 have a floating fit clearance 800, the floating range Δ of which is between 0.1mm and 2mm. Specifically, as shown... Figure 22As shown, both the first slide rail 410 and the second slide rail 420 are composed of nested inner slide rails 430 and outer slide rails 440. The inner slide rail 430 is restricted to slide within the outer slide rail 440. In the plane perpendicular to the sliding direction, the outer slide rail 440 and the inner slide rail 430 have a mating gap Δ1 in the transverse direction and a mating gap Δ2 in the longitudinal direction. The mutually perpendicular mating gaps Δ1 and Δ2 together constitute the floating mating gap 800.

[0059] The purpose of setting up a floating slide rail is as follows: Figure 23 and 24 As shown, the connecting mechanism 600 includes an upper rotating shaft mechanism 610 connecting the first upper housing 110 and the second upper housing 120, and a lower rotating shaft mechanism 620 connecting the first lower housing 210 and the second lower housing 220. Since the cross-sectional area of ​​the upper housing 100 is larger than that of the lower housing 200, forming a nested structure, the upper rotating shaft mechanism 610 and the lower rotating shaft mechanism 620 are not mounted on the same support surface. Figure 25 and Figure 26 It can be seen that the support surfaces of the two mechanisms have a height difference Δd. Therefore, the installation distance Δd between the rotation axes of the upper rotating shaft mechanism 610 and the lower rotating shaft mechanism 620 must not be greater than the floating fit clearance 800. Only by meeting this adjustment can it be ensured that the upper rotating shaft mechanism 610 and the lower rotating shaft mechanism 620 will not be damaged or have their service life reduced due to internal stress during the opening and closing of the suitcase.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the technical solution of this utility model, and are not intended to limit the specific implementation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A suitcase with expandable capacity. It includes an upper housing (100) and a lower housing (200), the upper housing (100) and the lower housing (200) being slidably mounted relative to each other, the upper housing (100) including a first upper shell (110) and a second upper shell (120), The lower housing (200) includes a first lower shell (210) and a second lower shell (220). The first upper housing (110) has a first upper frame (310) at its opening edge. The second upper housing (120) has a second upper frame (320) at its opening edge. The first lower housing (210) has a first lower frame (330) at its opening edge. The second lower housing (220) has a second lower frame (340) at its opening edge. Along the direction in which the upper housing (100) and the lower housing (200) slide relative to each other, A first slide rail (410) is provided between the first upper frame (310) and the first lower frame (330). A second slide rail (420) is provided between the second upper frame (320) and the second lower frame (340). The first upper housing (110) and the first lower housing (210) are slidably connected relative to each other via a first slide rail (410) to form a first side box (510). The second upper housing (120) and the second lower housing (220) are slidably connected relative to each other via the second slide rail (420) to form the second side box (520). The first side box (510) and the second side box (520) are connected on one side by a connecting mechanism (600) to form a relatively rotatable whole. The other side opens and closes relative to each other, allowing the first side box (510) and the second side box (520) to have an unfolded state and a closed state. In the closed state, a storage space is formed inside the first side box (510) and the second side box (520). The characteristic of this design is that... The first upper frame (310) and the first lower frame (330) are aligned on the side facing the second side housing (520), and the first slide rail (410) is disposed in the space on the other side away from the second side housing (520). The second upper frame (320) and the second lower frame (340) are aligned on the side facing the first side box (510), and the second slide rail (420) is located in the space on the other side away from the first side box (510).

2. The expandable capacity suitcase according to claim 1, characterized in that, A first upper opening frame (910) and a first lower opening frame (930) are provided on the mating side of the first upper housing (110) and the first lower housing (210). A second upper opening frame (920) and a second lower opening frame (940) are provided on the mating side of the second upper housing (120) and the second lower housing (220). The first upper opening frame (910) is connected to the first upper frame (310). The second upper opening frame (920) is connected to the second upper frame (320). The first lower opening frame (930) is connected to the first lower border frame (330). The second lower opening frame (940) is connected to the second lower border frame (340).

3. The expandable capacity suitcase according to claim 2, characterized in that, The first upper opening frame (910) is connected to the end of the first upper frame (310). The second upper opening frame (920) is connected to the end of the second upper frame (320). The first lower frame (330) extends beyond the first lower housing (210) and the first lower opening frame (930) to form a first extension (331) facing the upper housing (100). The second lower frame (340) extends beyond the second lower housing (220) and the second lower opening frame (940) to form a second extension (341) toward the upper housing (100).

4. A suitcase with expandable capacity according to claim 3, characterized in that, The upper housing (100) has a larger cross-sectional area than the lower housing (200) and is slidably mounted on the lower housing (200). The first upper opening frame (910) and the second upper opening frame (920) are provided with flanges (911, 921) facing the first lower housing (210) and the second lower housing (220).

5. A suitcase with expandable capacity according to any one of claims 1-4, characterized in that, A closing positioning mechanism (700) is provided between the first upper frame (310) and the second upper frame (320), and between the first lower frame (330) and the second lower frame (340). In the closed state, the closing positioning mechanism (700) restricts the alignment of the first slide rail (410) and the second slide rail (420).

6. A suitcase with expandable capacity according to claim 5, characterized in that, The closing positioning mechanism (700) includes a wedge-shaped positioning groove (710) disposed on the first upper frame (310) and the first lower frame (330), and a wedge-shaped positioning strip (720) disposed on the second upper frame (320) and the second lower frame (340). In the closed state, the wedge-shaped positioning strip (720) is embedded in the wedge-shaped positioning groove (710).

7. A suitcase with expandable capacity according to claim 6, characterized in that, The wedge-shaped positioning groove (710) is composed of a first inner inclined surface (711) close to the storage space and a second inner inclined surface (712) away from the storage space. The slope of the first inner inclined surface (711) is less than that of the second inner inclined surface (712). The wedge-shaped positioning strip (720) has a first outer inclined surface (721) close to the storage space and a second outer inclined surface (722) away from the storage space. An opening groove (723) is provided on the second outer inclined surface (722). The opening width D of the opening groove (723) is greater than the edge width d of the wedge-shaped positioning groove (710) on the side away from the storage space.

8. A capacity-expandable suitcase according to any one of claims 1-4, characterized in that, On a plane perpendicular to the relative sliding direction of the housing (100) and the lower housing (200), the first slide rail (410) and the second slide rail (420) have a floating fit clearance (800).

9. A suitcase with expandable capacity according to claim 8, characterized in that, The first slide rail (410) and the second slide rail (420) are both composed of an inner slide rail (430) and an outer slide rail (440) nested together. The inner slide rail (430) is restricted to slide within the outer slide rail (440). On the plane perpendicular to the sliding direction, the outer slide rail (440) and the inner slide rail (430) have a mating gap Δ1 in the transverse direction and a mating gap Δ2 in the longitudinal direction. The mutually perpendicular mating gaps Δ1 and Δ2 together constitute the floating mating gap (800).

10. A suitcase with expandable capacity according to claim 8, characterized in that, The connecting mechanism (600) includes an upper rotating shaft mechanism (610) connecting the first upper housing (110) and the second upper housing (120) and a lower rotating shaft mechanism (620) connecting the first lower housing (210) and the second lower housing (220). The installation distance Δd between the rotation axes of the upper rotating shaft mechanism (610) and the lower rotating shaft mechanism (620) is not greater than the floating fit clearance (800).

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