A telescoping luggage case

Abstract

The utility model belongs to the field of travel equipment, it is a telescopic luggage. It is composed of upper box body and lower box body, both relative sliding installation. The upper box body is equipped with upper telescopic frame and is connected with it, the lower box body is equipped with lower telescopic frame and is connected with it, and the upper and lower telescopic frame mutually cooperate and slide telescopic. At the same time, be equipped with locking mechanism, can lock the upper and lower telescopic frame in one or more relative position. The upper telescopic frame or lower telescopic frame is equipped with the unlocking key exposed in the outside of box body, and is linked with locking mechanism, and triggers and can be unlocked. The luggage realizes telescopic through the cooperation of upper and lower telescopic frame, and expands the capacity of luggage;Locking mechanism is integrated in cooperation structure, and is controlled by unlocking key to lock or unlock, so that the upper and lower box body can be stably fixed in multiple preset positions, meet the flexible adjustment demand of user to different capacity, such as partial expansion or complete unfolding, also ensure the stability of the structure after adjustment.

Description

Technical Field

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

[0002] Expandable-capacity suitcases have showcased various possibilities in conceptual design. For example, vertical expansion can be achieved by increasing or decreasing the height of internal compartments, while lateral expansion might be accomplished through side extension panels or folding mechanisms. However, these designs have encountered numerous obstacles in practical application. On the one hand, complex mechanical structures often mean higher production costs and maintenance difficulties; on the other hand, structural stability and durability have become pressing issues. For instance, a typical expandable-capacity suitcase requires a locking mechanism to secure it to a specific capacity, preventing unauthorized expansion or contraction. In existing technologies, the locking mechanism can be optionally located on three basic structural elements: the suitcase body, the frame, and the sliding rails. However, in practice, none of these three locations are suitable.

[0003] As a key component ensuring stable operation of a suitcase within a specific capacity, the locking mechanism also faces numerous design challenges. While placing the locking mechanism on the suitcase body seems straightforward, long-term use and stress on the body material (such as plastic or lightweight metal) can cause slight deformation, affecting the accuracy and reliability of the locking mechanism. Body deformation can also cause lock misalignment, making opening and closing difficult. Solutions such as those demonstrated in Chinese patents CN220800314U (retractable suitcase), CN210018158U (a variable capacity suitcase), CN209983642U (retractable suitcase), and international patent application PCT / IB2020 / 050406 are relevant.

[0004] While locking mechanisms on the frame can theoretically reduce reliance on the strength of the case material, the frame itself, as a key component connecting the case and the sliding rails, is crucial for strength and stability. Adding a locking mechanism to the frame may weaken its structural integrity, especially under heavy loads or accidental impacts, potentially leading to deformation or even breakage. Solutions illustrated in Chinese patents CN109393695A (retractable trolley case) and CN210783259U (frame structure and luggage) demonstrate this approach.

[0005] As for the locking mechanism on the sliding rail, while it facilitates control of the extension and retraction movements, it often affects the smoothness and fluidity of the sliding action. The additional locking mechanism increases friction on the rail, requiring users to exert more force when adjusting the luggage compartment's capacity, and may also accelerate rail wear, shortening its lifespan. Utility Model Content

[0006] The purpose of this solution is to overcome the shortcomings or defects in the existing technology and provide a retractable suitcase.

[0007] This plan achieves the above objectives through the following methods.

[0008] This solution provides a retractable suitcase, including an upper body and a lower body, which are slidably installed relative to each other. The upper body has an upper telescopic frame connected to the upper body, and the lower body has a lower telescopic frame connected to the lower body. The upper and lower telescopic frames slide and extend in cooperation with each other, and a locking mechanism is provided to lock the upper and lower telescopic frames in one or more relative positions. The upper or lower telescopic frame has an unlocking button exposed on the outside of the upper or lower body, which is linked to the locking mechanism to trigger the locking mechanism to unlock.

[0009] By incorporating an upper telescopic frame within the upper compartment and a lower telescopic frame within the lower compartment, the luggage can be extended or retracted through the coordinated sliding movement of these frames, thus expanding its capacity. Simultaneously, a locking mechanism is integrated into the cooperating structure of the upper and lower telescopic frames. An unlocking button controls the locking mechanism's locking or unlocking, ensuring stable fixation of the upper and lower compartments in multiple preset positions. This allows users to flexibly adjust to different capacity needs, such as partial expansion or full unfolding, while also ensuring structural stability after adjustment and preventing arbitrary extension or retraction.

[0010] Furthermore, a telescopic rod is nested within the upper or lower telescopic frame. The telescopic rod shares structural space with the upper and lower telescopic frames, eliminating the need for additional internal space and maintaining the simplicity of the suitcase's interior. One end of the telescopic rod extends to the outside of the upper or lower compartment and connects to the suitcase handle. The unlock button is located on the handle. While providing the traditional function of pressing the unlock button to extend the handle for dragging the suitcase, it also integrates the telescopic and locking functions of the upper and lower compartments. That is, the unlock button unlocks the upper and lower compartments, and by gripping the handle and pulling the telescopic rod, the upper and lower telescopic frames can be extended or retracted, allowing the upper and lower compartments to expand. This reduces operational complexity and eliminates the need for additional extension and locking structures for the upper and lower compartments.

[0011] Furthermore, the lower telescopic frame includes a sleeve and a base. One end of the sleeve is connected to the base, and the base is fixed to the bottom surface of the lower compartment. The upper telescopic frame includes a core tube and a handle seat. One end of the core tube is connected to the handle seat, and the handle seat is fixed to the top surface of the upper compartment, with a portion exposed on the outside of the upper compartment. The other end of the core tube is inserted into the sleeve and slid relative to it, forming a rigid connection frame between the upper and lower compartments: "base-sleeve-core tube-handle seat". Simultaneously, one end of the telescopic rod extends to the handle seat on the outside of the upper compartment to connect to the suitcase handle, while the other end is inserted into the core tube and slid relative to it, forming a secondary nested structure of sleeve and core tube, and core tube and telescopic rod. This achieves dual space reuse of the "telescopic frame + rod," eliminating the need for additional space inside the compartment and maintaining the simplicity of the suitcase interior. Combined with the unlock button and locking mechanism, this allows users to easily extend and quickly lock the suitcase, enabling a smooth one-handed operation of "pressing the unlock button → gripping the handle → pulling the telescopic section → releasing the unlock button," making it simple and convenient. In addition, the handle can be housed within the handle base, preventing damage from collisions caused by the handle protruding during transportation or when not in use, while also improving the neatness of the appearance.

[0012] Furthermore, the locking mechanism includes a floating lock cylinder protruding from the surface of the telescopic rod and a linkage mechanism within the telescopic rod. The unlock button, through the linkage mechanism, drives the floating lock cylinder. Through holes are provided on the sleeve and core tube to cooperate with the floating lock cylinder, locking the upper and lower telescopic frames in one or more relative positions, ensuring that the upper and lower boxes are stably maintained at the preset capacity. Users only need to press the unlock button on the handle to instantly disengage the lock cylinder from the through hole via the linkage mechanism, without requiring additional adjustment or significant force. This simplifies the unlocking process, making it particularly suitable for one-handed operation and significantly improving ease of operation and response speed.

[0013] Furthermore, the through-holes include several external through-holes on the sleeve and several internal through-holes on the core tube. With the telescopic rod and core tube fully inserted into the sleeve, in the initial state before the suitcase expands, the first external through-hole at one end of the sleeve and the first internal through-hole at the other end of the core tube correspond to the floating lock cylinder. The floating lock cylinder simultaneously inserts into these two through-holes, forming a "sleeve-core tube" lock, ensuring the suitcase's stability in its minimum capacity state. The other external and internal through-holes are staggered. When the suitcase begins to expand, the floating lock cylinder can only simultaneously insert into the corresponding through-hole when the core tube and sleeve move to the preset position, allowing for flexible adjustment to meet different suitcase capacity requirements.

[0014] Preferably, the through hole includes another external through hole and other internal through holes. The suitcase expands in two stages. In the initial state where the suitcase is not expanded, the user presses the unlock button to unlock the first external through hole and the first internal through hole. The telescopic rod is pulled outward relative to the core tube. The floating lock cylinder first passes through the other internal through holes and is inserted into them, so that the telescopic rod and the core tube are locked together. The telescopic rod drives the core tube to be pulled outward, and then passes through the other external through holes, so that the floating lock cylinder is inserted into the other internal through holes and at the same time inserted into the other external through holes, forming a lock between the core tube and the sleeve, realizing the expansion and fixation of the upper and lower suitcases.

[0015] Preferably, the through-hole includes multiple other external through-holes and other internal through-holes, which are alternately staggered. The floating lock cylinder alternately passes through the other internal through-holes and other external through-holes, allowing the suitcase to expand in multiple stages. In the initial state where the suitcase is not expanded, the user presses the unlock button to unlock the first external through-hole and the first internal through-hole. The telescopic rod is pulled outward relative to the core tube. The floating lock cylinder first passes through the first other internal through-hole and inserts into it, locking the telescopic rod and the core tube together. The telescopic rod then pulls the core tube outward, passing through the first other external through-hole, so that the floating lock cylinder is inserted into the first other internal through-hole and simultaneously inserted into the first other external through-hole, achieving the first stage of expansion and fixation of the upper and lower suitcases. When the user presses the unlock button again and pulls the telescopic rod, the floating lock cylinder passes through the second other internal through-hole and inserts into it, locking the telescopic rod and the core tube together. The telescopic rod then pulls the core tube outward, passing through the second other external through-hole, so that the floating lock cylinder is inserted into the second other internal through-hole and simultaneously inserted into the second other external through-hole, achieving the second stage of expansion and fixation of the upper and lower suitcases. This process continues in the same manner.

[0016] Preferably, multiple other internal through holes can be arranged in front of and offset from other external through holes. When the telescopic rod is pulled outward relative to the core tube, the floating lock cylinder alternately passes through the other internal through holes and other external through holes. Alternatively, multiple other external through holes and one or more other internal through holes can be arranged continuously at the other end of the sleeve, and the other internal through holes are distributed at intervals on the core tube. When aligned with any other external through hole, the floating lock cylinder locks both, thus achieving the above solution.

[0017] Furthermore, the other end of the sleeve and the other end of the core tube are provided with an outer positioning hole and an inner positioning hole that cooperate with the floating lock cylinder. When the suitcase is stretched to its maximum limit, the floating lock cylinder is inserted into the outer positioning hole and the inner positioning hole at the same time, realizing the locking of the upper and lower suitcases in the entire process of "initial state - partial expansion - maximum expansion". Users can obtain stable capacity fixation at any preset position, avoiding structural deformation or damage caused by overstretching or accidental retraction.

[0018] Furthermore, it includes a pop-out mechanism located at the other end of the telescopic rod. When the locking mechanism is triggered to unlock, the telescopic rod is automatically pushed to pop out the handle hidden inside the handle base. Users can easily grip the handle without having to manually pull it out, achieving a smooth experience and significantly improving ease of use.

[0019] Furthermore, the upper housing includes a first upper shell and a second upper shell. The first upper shell has a first upper frame at its opening edge, and the second upper shell has a second upper frame at its opening edge. The lower housing includes a first lower shell and a second lower shell. 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, along the direction in which the upper housing and the lower housing slide relative to each other.

[0020] A first slide rail is provided between the first upper frame and the first lower frame. The first upper shell and the first lower shell are slidably connected to each other through the first slide rail to form a first side box. A second slide rail is provided between the second upper frame and the second lower frame. The second upper shell and the second lower shell are slidably connected to each other through the second slide rail to form a second side box. The first side box and the second side box are connected on one side by a connecting mechanism to form a relatively rotatable whole. The other side is opened and closed so that the first side box and the second side box have an unfolded state and a closed state.

[0021] In the closed state, the interior of the first and second side boxes forms a storage space. 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. The second slide rail is set in the space on the other side away from the first side box.

[0022] Furthermore, on a plane perpendicular to the relative sliding direction of the main body and the lower body, the first and second slide rails have a floating fit clearance. This allows for a small amount of movement between the first and second slide rails on the plane perpendicular to the sliding direction, reducing rigid friction. When adjusting the luggage capacity, users do not need to overcome jamming caused by dimensional deviations or deformations; the sliding resistance is lower, and the operation is more effortless. Attached Figure Description Figure 1 This is a schematic diagram of the structure of an embodiment. Figure 1 .

[0023] Figure 2 This is a schematic diagram of the structure of an embodiment. Figure 2 .

[0024] Figure 3 This is a schematic diagram of the structure of an embodiment. Figure 3 .

[0025] Figure 4 This is a schematic diagram of the internal structure of an embodiment. Figure 1 .

[0026] Figure 5 This is a schematic diagram of the internal structure of an embodiment. Figure 2 .

[0027] Figure 6 This is a schematic diagram of the relative opening structure of a suitcase.

[0028] Figure 7 This is a schematic diagram of the upper and lower telescopic frame structure.

[0029] Figure 8 This is a schematic diagram of the structure of the core tube, sleeve, and telescopic rod.

[0030] Figure 9 This is a schematic diagram of a through hole.

[0031] Figure 10 Schematic diagram of the maximum tensile strength of the core tube and sleeve. Figure 2 .

[0032] Figure 11 This is a schematic diagram of the structure of a single internal or external through hole in Example 1.

[0033] Figure 12 This is a schematic diagram of the stretching process of the core tube, sleeve, and telescopic tie rod in Example 1. Figure 1 .

[0034] Figure 13 This is a schematic diagram of the stretching process of the core tube, sleeve, and telescopic tie rod in Example 1. Figure 2 .

[0035] Figure 14 This is a schematic diagram of the structure of multiple other internal and external through holes in Example 2.

[0036] Figure 15 This is a schematic diagram of the stretching process of the core tube, sleeve, and telescopic tie rod in Example 2. Figure 1 .

[0037] Figure 16 This is a schematic diagram of the stretching process of the core tube, sleeve, and telescopic tie rod in Example 2. Figure 2 .

[0038] Figure 17 This is a schematic diagram of the stretching process of the core tube, sleeve, and telescopic tie rod in Example 2. Figure 3 .

[0039] Figure 18 This is a schematic diagram of the stretching process of the core tube, sleeve, and telescopic tie rod in Example 2. Figure 4 .

[0040] Figure 19 This is a schematic diagram of the structure of several other internal and external through holes in Example 3. Detailed Implementation

[0041] 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.

[0042] Example 1 like Figure 1 The present invention is illustrated in one embodiment. A retractable suitcase includes an upper body 100 and a lower body 200, which are slidably mounted relative to each other.

[0043] like Figure 2 As shown, the upper housing 100 includes a first upper shell 110 and a second upper shell 120. The first upper shell 110 has a first upper frame 310 at its opening edge, and the second upper shell 120 has a second upper frame 320 at its opening edge. The lower housing 200 includes a first lower shell 210 and a second lower shell 220. 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, along the direction in which the upper housing 100 and the lower housing 200 slide relative to each other.

[0044] like Figure 3 As shown, a first slide rail 410 is provided between the first upper border 310 and the first lower border 330, and a second slide rail 420 is provided between the second upper border 320 and the second lower border 340. Combined with... Figure 4 and Figure 5 As shown, the first upper housing 110 and the first lower housing 210 are slidably connected relative to each other through the first slide rail 410 to form the first side housing 510, and the second upper housing 120 and the second lower housing 220 are slidably connected relative to each other through the second slide rail 420 to form the second side housing 520.

[0045] like Figure 1 Combination Figure 6As shown, the first side box 510 and the second side box 520 are connected by a connecting mechanism 600 to form a rotatable whole. Their other sides open and close, 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, the interior of the first side box 510 and the second side box 520 forms a storage space. The first upper frame 310 and the first lower frame 330 are aligned on the side facing the second side box 520, and the first slide rail 410 is located in the space on the other side away from the second side box 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. On a plane perpendicular to the relative sliding direction of the upper box 100 and the lower box 200, the first slide rail 410 and the second slide rail 420 have a floating fit gap.

[0046] like Figure 7 As shown, the upper housing 100 has an upper telescopic frame 131, and the lower housing 200 has a lower telescopic frame 132. The upper telescopic frame 131 is connected to the upper housing 100, and the lower telescopic frame 132 is connected to the lower housing 200. The upper telescopic frame 131 and the lower telescopic frame 132 slide and extend in cooperation with each other, and a locking mechanism 140 is provided to lock the upper telescopic frame 131 and the lower telescopic frame 132 in relative positions. A telescopic rod 163 is nested inside the upper telescopic frame 131 and the lower telescopic frame 132. One end of the telescopic rod 163 extends to the outside of the upper housing 100 and is connected to a handle 162. The handle 162 is provided with an unlocking button 150, which is linked with the locking mechanism 140 to trigger the locking mechanism 140 to unlock. The lower telescopic frame 132 includes a sleeve 133 and a base 134. The base 134 is connected to the bottom surface of the lower housing 200 to form a fixed structure, and one end of the sleeve 133 is connected to the base 134. The upper telescopic frame 131 includes a core tube 135 and a handle seat 161 for accommodating the handle 162. The handle seat 161 is fixed to the bottom surface of the upper housing 100 and partially exposed on the outside of the upper housing 100. One end of the core tube 135 is connected to the handle seat 161, and the other end is inserted into the sleeve 133 and slides relative to it.

[0047] Combination Figure 8As shown, one end of the telescopic rod 163 is connected to the handle 162, and the other end is inserted into the core tube 135 for relative sliding. The locking mechanism 140 includes a floating lock core 141 protruding from the surface of the telescopic rod 163 and a linkage mechanism 142 within the telescopic rod 163. The unlocking key 150 drives the floating lock core 141 through the linkage mechanism 142. Through holes 170 are provided on the sleeve 133 and the core tube 135 to cooperate with the floating lock core 141, locking the upper telescopic frame 131 and the lower telescopic frame 132 in their relative positions. In addition, the other end of the telescopic rod 163 is also provided with a pop-out mechanism 180, which is used to push the telescopic rod 163 to automatically pop out the handle seat 161 when the locking mechanism 140 is triggered to unlock.

[0048] Further integration Figure 9 As shown, the through hole 170 includes an external through hole 171 opened on the sleeve 133 and an internal through hole 172 opened on the core tube 135. When the telescopic rod 163 and the core tube 135 are fully inserted into the sleeve 133, the first external through hole 1711 at one end of the sleeve 133 and the first internal through hole 1721 at the other end of the core tube 135 correspond to the floating lock cylinder 141, and the other external through holes 1712 and other internal through holes 1722 are staggered.

[0049] like Figure 10 As shown, the other end of the sleeve 133 and the other end of the core tube 135 are also provided with an outer positioning hole 1731 and an inner positioning hole 1732 that cooperate with the floating lock cylinder 141. When the sleeve 133 and the core tube 135 are stretched to their limit, the floating lock cylinder 141 is simultaneously inserted into the outer positioning hole 1731 and the inner positioning hole 1732, thereby locking the suitcase to its maximum capacity.

[0050] like Figure 11 As shown, in this embodiment, the through holes are configured as one external through hole 1712 and one internal through hole 1722, and the suitcase extends in two sections, combined with... Figure 12 As shown, in the initial state where the suitcase is not extended, the user presses the unlock button 150 to unlock the first external through hole 1711 and the first internal through hole 1721. The telescopic rod 163 is pulled outward relative to the core tube 135. The floating lock cylinder 141 first passes through other internal through holes 1722 and inserts into them, so that the telescopic rod 163 and the core tube 135 are locked together. Figure 13 As shown, the telescopic rod 163 drives the core tube 135 to be pulled outward, and then through other external through holes 1712, so that the floating lock core 141 is inserted into other internal through holes 1722 and other external through holes 1712 at the same time, forming a lock between the core tube 135 and the sleeve 133, realizing the expansion and fixation of the upper and lower boxes.

[0051] Example 2 like Figure 14The present invention is shown in another embodiment. This embodiment is basically the same in structure as embodiment 1. The difference is that the through hole includes multiple other external through holes 1712 and other internal through holes 1722. The other internal and external through holes are alternately staggered. The floating lock cylinder 141 alternately passes through other internal through holes 1712 and other external through holes 1722, and the luggage box is multi-segmented.

[0052] like Figure 15 As shown, in the initial state where the suitcase is not extended, the user presses the unlock button 150 to unlock the floating lock cylinder 141 from the first external through hole 1711 and the first internal through hole 1721. The telescopic rod 163 is pulled outward relative to the core tube 135. The floating lock cylinder 141 first passes through the first other internal through hole 1722 and inserts into it, so that the telescopic rod 163 and the core tube 135 are locked together. Figure 16 As shown, the telescopic rod 163 drives the core tube 135 to be pulled outward, and then through the first other external through hole 1712, so that the floating lock core 141 is inserted into the first other internal through hole 1722 and at the same time inserted into the first other external through hole 1712, realizing the first stage of expansion and fixation of the upper and lower boxes.

[0053] Combination Figure 17 As shown, when the user presses the unlock button 150 again and pulls the telescopic rod 163, the floating lock cylinder 141 passes through the second internal through hole 1722 and is inserted into it, so that the telescopic rod 163 and the core tube 135 lock each other again. Figure 18 As shown, the telescopic rod 163 drives the core tube 135 to be pulled outward, and then through the second other external through hole 1712, so that the floating lock cylinder 141 is inserted into the second other internal through hole 1722 and at the same time inserted into the second other external through hole 1712, realizing the second stage expansion and fixation of the upper and lower boxes, and so on.

[0054] Example 3 like Figure 19 Another embodiment of the present invention is shown. This embodiment is basically the same in structure as embodiment 2. The difference is that the through hole includes multiple other external through holes 1712 and multiple other internal through holes 1722. The multiple other external through holes 1712 are arranged continuously at the other end of the sleeve 133, and the other internal through holes 1722 are distributed at intervals on the core tube 135. When aligned with any other external through hole 1712, the floating lock cylinder 141 locks both.

[0055] 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 retractable suitcase, comprising an upper body (100) and a lower body (200). The upper housing (100) and the lower housing (200) are slidably installed relative to each other; Its features are, The upper box (100) is equipped with an upper telescopic frame (131). The upper telescopic frame (131) is connected to the upper housing (100). The lower housing (200) is equipped with a lower telescopic frame (132). The lower telescopic frame (132) is connected to the lower housing (200). The upper telescopic frame (131) and the lower telescopic frame (132) cooperate to slide and extend, and a locking mechanism (140) is provided to lock the upper telescopic frame (131) and the lower telescopic frame (132) in one or more relative positions. The upper telescopic frame (131) or lower telescopic frame (132) is provided with an unlocking key (150) exposed on the outside of the upper box (100) or lower box (200) and linked with the locking mechanism (140) to trigger the locking mechanism (140) to unlock.

2. The retractable suitcase according to claim 1, characterized in that, The upper telescopic frame (131) or the lower telescopic frame (132) is nested with a telescopic rod (163). The telescopic rod (163) extends to one end of the upper box (100) or lower box (200) and is connected to a handle (162). The unlock button (150) is located on the handle (162).

3. A retractable suitcase according to claim 2, characterized in that, The lower telescopic frame (132) includes a sleeve (133) and a base (134). One end of the sleeve (133) is connected to the base (134). The base (134) is connected to the bottom surface of the lower housing (200). The upper telescopic frame (131) includes a core tube (135) and a handle base (161). One end of the core tube (135) is connected to the handle seat (161), and the other end is inserted into the sleeve (133) and slides relative to it. The handle seat (161) is connected to the bottom surface of the upper housing (100), and is partially exposed on the outside of the upper housing (100). The other end of the telescopic rod (163) is inserted into the core tube (135) and slides relative to it. The handle (162) can be accommodated within the handle base (161).

4. A retractable suitcase according to claim 3, characterized in that, The locking mechanism (140) includes a floating lock cylinder (141) protruding from the surface of the telescopic rod (163) and a linkage mechanism (142) within the telescopic rod (163). The unlocking key (150) drives the floating lock cylinder (141) through the linkage mechanism (142). The sleeve (133) and core tube (135) are provided with through holes (170) to cooperate with the floating lock core (141) to lock the upper telescopic frame (131) and the lower telescopic frame (132) in one or more relative positions.

5. A retractable suitcase according to claim 4, characterized in that, The through hole (170) includes a plurality of external through holes (171) formed on the sleeve (133) and a plurality of internal through holes (172) formed on the core tube (135), at the relative positions where the telescopic rod (163) and the core tube (135) are fully inserted into the sleeve (133). The external through hole (171) includes a first external through hole (1711) and other external through holes (1712). The internal through hole (172) includes a first internal through hole (1721) and other internal through holes (1722). The first external through hole (1711) at one end of the sleeve (133) corresponds to the first internal through hole (1721) at the other end of the core tube (135) and the floating lock cylinder (141), while the other external through holes (1712) and other internal through holes (1722) are staggered.

6. A retractable suitcase according to claim 5, characterized in that, Includes one other external through hole (1712) and other internal through holes (1722). When the telescopic rod (163) is pulled outward relative to the core tube (135), The floating lock cylinder (141) first passes through other internal through holes (1722) and then through other external through holes (1712). or, This includes multiple other external through holes (1712) and other internal through holes (1722), which are alternately staggered. When the telescopic rod (163) is pulled outward relative to the core tube (135), The floating lock cylinder (141) alternately passes through other internal through holes (1722) and other external through holes (1712); or, This includes multiple other external through holes (1712) and other internal through holes (1722), with the multiple other internal through holes (1722) arranged in front of and offset from the other external through holes (1712). When the telescopic rod (163) is pulled outward relative to the core tube (135), The floating lock cylinder (141) alternately passes through other internal through holes (1722) and other external through holes (1712). or, The floating lock cylinder (141) includes multiple other external through holes (1712) and one or more other internal through holes (1722). The multiple other external through holes (1712) are arranged continuously at the other end of the sleeve (133), and the other internal through holes (1722) are distributed at intervals on the core tube (135). When aligned with any of the other external through holes (1712), the floating lock cylinder (141) locks both.

7. A retractable suitcase according to any one of claims 5 or 6, characterized in that, The other end of the sleeve (133) and the other end of the core tube (135) are provided with an outer positioning hole (1731) and an inner positioning hole (1732) that cooperate with the floating lock core (141).

8. A retractable suitcase according to any one of claims 2-6, characterized in that, It also includes a pop-out mechanism (180), located at the other end of the telescopic lever (163), for pushing the telescopic lever (163) to pop out the handle (162) when the locking mechanism (140) is triggered to unlock.

9. A retractable suitcase according to any one of claims 1-6, characterized in that, The upper housing (100) includes 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 shell (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 the first slide rail (410) to form the 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, and the other side opens and closes 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. In the closed state, the interiors of the first side box (510) and the second side box (520) form a storage space. The first upper frame (310) and the first lower frame (330) are aligned on the side facing the second side box (520). The first slide rail (410) is located in the space on the side opposite to 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). The second slide rail (420) is located in the space on the other side away from the first side box (510).

10. A retractable suitcase according to claim 9, 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.

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