A four-wheeled trolley case with adjustable push-pull rod

Abstract

This application relates to a four-wheeled trolley case with an adjustable push-pull rod, belonging to the field of four-wheeled trolley cases. It includes a movable case body, a mounting cover plate that fits onto the top surface of the movable case body, and a push-pull rod rotatably connected to the movable case body. The movable case body has a receiving cavity; the outer side wall of the movable case body has an arrangement groove for arranging the push-pull rod. The push-pull rod is also fitted with a locking plate, and the movable case body is provided with a locking assembly for locking the locking plate to the movable case body. The locking assembly has a first position and a second position. When the locking assembly is in the first position, the locking plate is locked to the movable case body; when the locking assembly is in the second position, the locking plate is disengaged from the movable case body. This application improves the flexibility of the push-pull rod of the four-wheeled trolley case.

Description

Technical Field

[0001] This application relates to the field of four-wheeled suitcases, and more particularly to a four-wheeled suitcase with an adjustable push-pull rod. Background Technology

[0002] In modern travel, four-wheeled suitcases have become widely used as a convenient means of transporting luggage. With the increasing demands of travelers, these suitcases not only need to meet the need to carry various items, but also need to be more effortless and convenient during movement, while possessing a certain degree of space utilization efficiency and stability to adapt to different travel scenarios.

[0003] Existing four-wheeled suitcases mainly consist of a movable case, a mounting cover that fits onto the top of the movable case, and a push-pull rod for moving the case. The push-pull rod is either fixed to the movable case by bolts or integrated with the case. However, in practical applications, these four-wheeled suitcases had significant drawbacks: the position and angle of the push-pull rod could not be adjusted, resulting in poor flexibility during use.

[0004] In response to the aforementioned technologies, the inventor provides a four-wheeled trolley case with an adjustable push-pull rod. Utility Model Content

[0005] To improve the flexibility of the push-pull handle of a four-wheeled suitcase, this application provides a four-wheeled suitcase with an adjustable push-pull handle.

[0006] The technical solution of this application for a four-wheeled trolley case with adjustable push-pull rod is as follows:

[0007] A four-wheeled trolley case with an adjustable push-pull rod includes a movable case body, a mounting cover plate that covers the top surface of the movable case body, and a push-pull rod rotatably connected to the movable case body. The movable case body has a receiving cavity. The outer side wall of the movable case body has an arrangement groove for arranging the push-pull rod. The push-pull rod is also fitted with a locking plate, and the movable case body is provided with a locking assembly for locking the locking plate to the movable case body. The locking assembly has a first position and a second position. When the locking assembly is in the first position, the locking plate is locked to the movable case body. When the locking assembly is in the second position, the locking plate is disengaged from the movable case body.

[0008] By adopting the above technical solution, during the use of the four-wheeled trolley case with adjustable push-pull rod, the push-pull rod can be flexibly adjusted through the cooperation between the locking component and the locking plate. When the locking component is in the first position, the locking plate is locked to the outer wall of the moving case, pressing the push-pull rod against the moving case so that the push-pull rod is vertically arranged on the ground. When the locking component is in the second position, the locking plate disengages from the moving case, allowing the push-pull rod to rotate around the connecting shaft with the moving case as the rotation axis, so as to adapt to different usage scenarios and help improve the flexibility of using the four-wheeled trolley case.

[0009] Optionally, the inner cavity sidewall of the movable housing is provided with a locking groove. The locking assembly includes two symmetrically arranged locking seats that are slidably installed in the locking groove, a limiting post for limiting the locking seats, a limiting plate that is threadedly engaged with the limiting post, and an elastic piece disposed in the locking groove and used to drive the locking seats to reset. The movable housing is provided with an installation opening in the locking groove, and the locking plate is provided with a locking opening that corresponds to the installation opening. The locking seat has a locking block that extends out of the installation opening, and the locking block has an abutting surface that abuts against the locking plate. The locking seat is provided with a waist-shaped groove that engages with the limiting block.

[0010] By adopting the above technical solution, the specific structure of the locking assembly is disclosed. A locking groove is formed on the side wall of the movable housing cavity. The locking seats are symmetrically arranged and slidably installed in the locking groove. With the cooperation of the limiting post and the limiting plate, the movement of the locking seats can be restricted. The locking block of the locking seat extends out of the locking opening, and its abutting surface abuts against the locking plate to achieve locking. The waist-shaped groove cooperates with the limiting block to make the movement of the locking seats more stable. The elastic plate ensures that the two locking seats always have a tendency to slide in opposite directions. When it is necessary to unlock the locking assembly and the locking plate, it is only necessary to drive the two locking seats to move relative to each other, causing the abutting surface of the locking block to disengage from the surface of the locking plate, thus achieving unlocking.

[0011] Optionally, the locking seat has an arc-shaped plate that cooperates with the elastic piece. The elastic piece is arranged on both sides of the arc-shaped plate and abuts against both sides of the arc-shaped plate, causing the two ends of the arc-shaped plate to always tend to move towards the middle.

[0012] By adopting the above technical solution, the locking seat is equipped with an arc-shaped plate, and elastic plates are arranged on both sides of the arc-shaped plate to drive the two ends of the arc-shaped plate to move towards the middle. This allows the locking seat to be reset better under the action of the elastic plates, ensuring that the locking and unlocking functions of the locking assembly on the locking plate are stable and reliable.

[0013] Optionally, the movable housing is further provided with a cup holder assembly at the arrangement slot. The cup holder assembly includes a cup holder sleeve with its top end rotatably connected to the movable housing, a cup holder base with its bottom end rotatably connected to the movable housing, and a transmission link rotatably connecting the cup holder sleeve and the cup holder base. The bottom of the cup holder sleeve is provided with a lifting handle for lifting the cup holder sleeve.

[0014] By adopting the above technical solution, the specific structure of the cup holder assembly is disclosed. When it is necessary to open the cup holder assembly, it is only necessary to lift the lifting handle, so that the cup holder sleeve will rotate around the connecting shaft between the cup holder sleeve and the moving case. Under the transmission of the transmission link, the cup holder base will rotate around the connecting shaft between the cup holder base and the moving case, thereby opening the cup holder assembly and allowing the cup to be placed on the top surface of the cup holder base. This helps to improve the flexibility and practicality of the push-pull adjustable four-wheel trolley case.

[0015] Optionally, the cup holder base is provided with a limiting protrusion ring on the side facing the movable box, and the cup holder base is provided with a clearance groove at the limiting protrusion ring for arranging the transmission link.

[0016] By adopting the above technical solution, the limiting protrusion ring circumferentially provided on the cup holder base helps improve the stability of the cups placed on the top surface of the cup holder base. The relief groove provides space for the transmission linkage, making the structure of the cup holder assembly more reasonable.

[0017] Optionally, the movable housing includes movable rollers, a housing bottom plate, a rear side plate having the arrangement groove, a front side plate arranged opposite to the rear side plate, and a connecting side plate connecting the rear side plate and the front side plate; the movable rollers are symmetrically arranged at the bottom of the front side plate and the rear side plate; the connecting side plate includes a first side plate rotatably connected to the front side plate at one end and a second side plate rotatably connected to the first side plate at one end and rotatably connected to the rear side plate at the other end; the rear side plate has an extension extending in a direction away from the push-pull rod, and one end of the housing bottom plate is rotatably connected to the bottom of the front side plate and the other end abuts against the top surface of the extension.

[0018] By adopting the above technical solution, the specific structure of the mobile case is disclosed. The setting of the moving rollers helps the case to move. The rotating connection structure of the connecting side panel makes the case foldable to save storage space. The connection method between the extension of the rear side panel and the bottom plate of the case helps to enhance the structural stability and support of the mobile case.

[0019] Optionally, the top of the connecting side plate is provided with a sliding groove and a locking member is slidably installed in the sliding groove. The sliding groove is biased towards the top of the connecting side plate. When the locking member is located on one side of the connection between the first side plate and the second side plate, the first side plate and the second side plate can be folded.

[0020] By adopting the above technical solution, the cooperation between the sliding groove and the locking member on the connecting side plate helps to lock the rotational connection between the first side plate and the second side plate, reducing the probability of the first side plate and the second side plate folding during use. Furthermore, by sliding the locking member on the sliding groove, the first side plate and the second side plate can be locked and unlocked in rotation.

[0021] Optionally, the movable housing is further provided with a partition plate in the accommodating cavity, and the side wall of the partition plate abuts against the extension of the rear side plate, and a storage gap is formed between the partition plate and the rear side plate for placing the mounting cover plate.

[0022] By adopting the above technical solution, a partition plate is set in the accommodating cavity, and it abuts against the extension of the rear side plate to form a storage gap, which can be used to place the mounting cover plate, thereby realizing the storage of the mounting cover plate and improving the utilization rate of the internal space of the suitcase.

[0023] Optionally, the top surface of the mounting cover plate has a mounting groove at the end away from the rear side plate, the mounting cover plate has a cover plate handle at the mounting groove and a snap-fit ​​block is provided around the cover plate handle, and a snap-fit ​​groove that cooperates with the snap-fit ​​block is correspondingly provided at the mounting groove.

[0024] By adopting the above technical solution, an installation groove is opened on the top surface of the mounting cover away from the rear side plate, and a cover handle with a snap-fit ​​block is set. The snap-fit ​​groove at the installation groove helps to open or close the mounting cover through the cover handle. At the same time, the snap-fit ​​block and the snap-fit ​​groove can achieve a stable installation of the cover handle.

[0025] Optionally, a fastener for restricting the rotation of the connecting side plate is also provided between the rear side plate and the connecting side plate.

[0026] By adopting the above technical solution, the fastener between the rear side panel and the connecting side panel helps to restrict the rotation of the connecting side panel and improve the structural stability of the box.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. A four-wheeled trolley case with adjustable push-pull rod. During the use of the four-wheeled trolley case with adjustable push-pull rod, the push-pull rod can be flexibly adjusted through the cooperation between the locking component and the locking plate. When the locking component is in the first position, the locking plate is locked to the outer wall of the movable case, pressing the push-pull rod against the movable case so that the push-pull rod is vertically arranged on the ground. When the locking component is in the second position, the locking plate is disengaged from the movable case, so that the push-pull rod can rotate about the connecting shaft with the movable case as the rotation axis to adapt to different usage scenarios and help improve the flexibility of the four-wheeled trolley case.

[0029] 2. The cup holder assembly helps to improve the flexibility and practicality of the four-wheeled trolley case with adjustable push-pull rod, and the circumferential limiting protrusion of the cup holder base helps to improve the stability of the cup placed on the top surface of the cup holder base.

[0030] 3. The cooperation between the sliding groove and the locking member on the connecting side plate helps to lock the rotational connection between the first side plate and the second side plate, reducing the probability of the first side plate and the second side plate folding during use. Furthermore, the sliding of the locking member on the sliding groove enables the locking and unlocking of the first side plate and the second side plate during rotation. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a four-wheeled trolley case with adjustable push-pull rods in an embodiment of this application.

[0032] Figure 2 This is a schematic diagram of the structure of the locking plate and the movable box in an embodiment of this application.

[0033] Figure 3 This is a schematic diagram of the structure of the locking component and the movable box in an embodiment of this application.

[0034] Figure 4 This is a schematic diagram of the locking seat in an embodiment of this application.

[0035] Figure 5 This is a schematic diagram of the structure of the cup holder assembly and the movable box in an embodiment of this application.

[0036] Figure 6 This is a schematic diagram of the cup holder assembly in an embodiment of this application.

[0037] Figure 7 This is a schematic diagram of the structure of the movable box in an embodiment of this application.

[0038] Figure 8 This is a schematic diagram of the connecting side plate in an embodiment of this application.

[0039] Figure 9 yes Figure 8A magnified view of a portion of point A in the middle.

[0040] Figure 10 This is a schematic diagram of the locking component in an embodiment of this application.

[0041] Figure 11 This is a schematic diagram of the structure of the cover plate and the cover plate handle in the embodiment of this application.

[0042] Explanation of reference numerals in the attached drawings: 1. Movable housing; 11. Receiving cavity; 12. Arrangement groove; 13. Locking groove; 131. Mounting opening; 132. Elastic sheet; 14. Movable roller; 15. Housing bottom plate; 151. Fixing block; 16. Rear side plate; 161. Extension; 17. Front side plate; 18. Connecting side plate; 181. First side plate; 182. Second side plate; 183. Guide surface; 184. Sliding groove; 185. Locking element; 1851. Limiting protrusion; 1852. Limiting part; 186. Limiting groove; 187. Fixing groove; 188. Limiting slide groove; 19. Divider plate 2. Install cover plate; 21. Install groove; 22. Cover plate handle; 221. Snap-fit ​​block; 23. Snap-fit ​​groove; 3. Push-pull rod; 31. First rod section; 32. Second rod section; 33. Locking plate; 331. Locking opening; 4. Locking assembly; 41. Locking seat; 411. Waist-shaped groove; 412. Locking block; 4121. Abutment surface; 413. Arc plate; 42. Limiting post; 43. Limiting plate; 5. Cup holder assembly; 51. Cup holder sleeve; 511. Lifting handle; 52. Cup holder base; 521. Limiting protrusion ring; 522. Leaving groove; 53. Transmission connecting rod; 6. Fastener. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail.

[0044] This application discloses a four-wheeled trolley case with an adjustable push-pull rod. (Refer to...) Figure 1 A four-wheeled trolley case with an adjustable push-pull rod includes a movable case body 1, a mounting cover 2 that covers the top surface of the movable case body 1, and a push-pull rod 3 that is rotatably connected to the outer side wall of the movable case body 1. The movable case body 1 is a cuboid with an open top and has a receiving cavity 11 for placing items.

[0045] Reference Figure 1 and Figure 2The push-pull rod 3 is used to move the movable housing 1. The outer wall of the movable housing 1 has an arrangement groove 12 for arranging the push-pull rod 3. The push-pull rod 3 has a first rod segment 31 arranged in the arrangement groove 12 and a second rod segment 32 connected to the top surface of the first rod segment 31. A locking plate 33 is sleeved on the first rod segment 31 of the push-pull rod 3. In order to press the push-pull rod 3 against the movable housing 1 by the locking plate 33, the movable housing 1 is provided with a locking assembly 4 for locking the locking plate 33 to the outer wall of the movable housing 1. The inner cavity side wall of the movable housing 1 has a locking groove 13 for arranging the locking assembly 4. The movable housing 1 has an installation opening 131 in the locking groove 13, and the locking plate 33 has a locking opening 331 arranged corresponding to the installation opening 131.

[0046] Reference Figure 3 and Figure 4 The locking assembly 4 includes two symmetrically arranged locking seats 41 slidably installed in the locking groove 13, a limiting post 42 for limiting the sliding of the locking seats 41, a limiting plate 43 threadedly engaged with the limiting post 42, and an elastic piece 132 disposed in the locking groove 13 for driving the locking seats 41 to reset. The locking seats 41 have a waist-shaped groove 411 that engages with the limiting post, and the locking seats 41 also have a locking block 412 extending out of the mounting opening 131, with an abutting surface 4121 abutting against the side of the locking plate 33 facing away from the moving housing 1. The locking seats 41 have an arc-shaped plate 413 that engages with the elastic piece 132. The elastic piece 132 is arranged on both sides of the arc-shaped plate 413 and abuts against both sides of the arc-shaped plate 413 to drive the two ends of the arc-shaped plate 413 to always tend to move towards the middle of the arc-shaped plate 413, so that the two locking seats 41 always tend to slide in opposite directions. The locking component 4 has a first station and a second station. When the locking component 4 is in the first station, the locking plate 33 is locked to the outer wall of the movable box 1, so that the first end of the push-pull rod 3 abuts against the movable box 1. When the locking component 4 is in the second station, the locking plate 33 is disengaged from the movable box 1, so that the user can flexibly adjust the angle of the push-pull rod 3.

[0047] Reference Figure 2 , Figure 5 and Figure 6To improve the practicality of the four-wheeled trolley case with adjustable push-pull rod, a cup holder assembly 5 is also provided at the arrangement slot 12 of the movable case body 1, and the locking plate 33 has an opening for arranging the cup holder assembly 5. The cup holder assembly 5 includes a cup holder sleeve 51 rotatably connected to the top of the movable case body 1, a cup holder base 52 rotatably connected to the bottom of the movable case body 1, and a transmission link 53 connecting the cup holder sleeve 51 and the cup holder base 52. The two ends of the transmission link 53 are rotatably connected to the cup holder base 52 and the cup holder sleeve 51, respectively. To facilitate opening the cup holder assembly 5, the bottom of the cup holder sleeve 51 has a downwardly extending lifting handle 511 for lifting the cup holder sleeve 51. When the cup holder assembly 5 is needed, simply lift the cup holder handle to cause the cup holder sleeve 51 to rotate upward about the axis of rotation connecting its top to the movable housing 1. Then, through the transmission link 53, the cup holder base 52 rotates downward about the axis of rotation connecting its bottom to the movable housing 1, thus opening the cup holder assembly 5. To ensure the stability of the cups placed on the cup holder assembly 5, the cup holder base 52 is provided with a limiting protrusion ring 521 circumferentially on the side facing the movable housing 1, and the cup holder base 52 has a clearance groove 522 at the limiting protrusion ring 521 for the transmission link 53 to be arranged.

[0048] Reference Figure 7 The movable housing 1 includes movable rollers 14, a housing bottom plate 15, a rear side plate 16 with an arrangement groove 12, a front side plate 17 arranged opposite to the rear side plate 16, and a connecting side plate 18 connecting the front side plate 17 and the rear side plate 16. The four movable rollers 14 are symmetrically arranged in pairs at the bottom of the front side plate 17 and the bottom of the rear side plate 16. The rear side plate 16 has an extension 161 extending away from the push-pull rod 3. One end of the housing bottom plate 15 is rotatably connected to the bottom of the front side plate 17, and the other end of the housing bottom plate 15 abuts against the top surface of the extension 161 of the rear side plate 16. Fixing blocks 151 are also provided on both sides of the housing bottom plate 15, and the connecting side plate 18 has fixing grooves 187 for arranging the fixing blocks 151.

[0049] Reference Figure 8 The connecting side plate 18 includes a first side plate 181 rotatably connected at one end to the front side plate 17 and a second side plate 182 rotatably connected at one end to the first side plate 181 and at the other end to the rear side plate 16. The first side plate 181 and the second side plate 182 have the same width, and the connection between the first side plate 181 and the second side plate 182 has a guide surface 183 extending inward toward the accommodating cavity 11, allowing the first side plate 181 and the second side plate 182 to fold inward.

[0050] Reference Figure 9 and Figure 10To improve the stability of the first side plate 181 and the second side plate 182 during use, a fastening member 6 is provided between the connecting side plate 18 and the rear side plate 16 to restrict the rotation of the connecting side plate 18. A sliding groove 184 is provided on the top of the connecting side plate 18, and the sliding groove 184 is biased towards the top of the connecting side plate 18. A locking member 185 is slidably installed on the connecting side plate 18 at the sliding groove 184. The locking member 185 has a limiting protrusion 1851, and the connecting side plate 18 has a limiting groove 186 at the sliding groove 184 for the limiting protrusion 1851 to be arranged. The locking member 185 also has a limiting part 1852 for limiting the locking member 185 from disengaging from the sliding groove 184. The connecting side plate 18 has a limiting groove 188 for arranging the limiting part 1852 at the sliding groove 184. When the locking member 185 is located on one side of the connection between the first side plate 181 and the second side plate 182, the first side plate 181 and the second side plate 182 can be folded inward.

[0051] Reference Figure 7 and Figure 11 To facilitate the removal of the mounting cover 2, a mounting groove 21 is provided on the top surface of the mounting cover 2 at the end away from the rear side plate 16. A cover handle 22 is provided at the mounting groove 21, and a snap-fit ​​block 221 is provided around the cover handle 22. A snap-fit ​​groove 23 is correspondingly provided at the mounting groove 21 for engaging with the snap-fit ​​block 221. The engagement between the snap-fit ​​block 221 and the snap-fit ​​groove 23 secures the cover handle 22 to the mounting cover 2. The movable housing 1 also has a partition plate 19 in the accommodating cavity 11, and the side wall of the partition plate 19 abuts against the extension 161 of the rear side plate 16. A storage gap is formed between the partition plate 19 and the rear side plate 16 for placing the mounting cover 2, reducing the probability of the mounting cover 2 being lost.

[0052] The implementation principle of the four-wheeled trolley case with adjustable push-pull rod in this application embodiment is as follows: During the use of the four-wheeled trolley case with adjustable push-pull rod, the push-pull rod 3 is pressed against the outer wall of the movable case body 1 by the cooperation between the locking plate 33 and the locking component 4. When it is necessary to unlock the cooperation between the locking component 4 and the locking plate 33, the two locking seats 41 can be slid towards the middle at the same time, so that the abutment surface 4121 of the locking block 412 slides to the locking opening 331, thereby unlocking the locking plate 33. This allows the push-pull rod 3 to rotate around the connecting shaft between the push-pull rod 3 and the movable case body 1 as the rotation axis to adapt to different usage needs and help improve the flexibility of the four-wheeled trolley case. Furthermore, the cup holder component 5 helps to improve the practicality of the four-wheeled trolley case.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A four-wheeled pull-along case with adjustable push-pull rod, characterized in that, The device includes a movable housing (1), a mounting cover plate (2) covering the top surface of the movable housing (1), and a push-pull rod (3) rotatably connected to the movable housing (1). The movable housing (1) has a receiving cavity (11). The outer side wall of the movable housing (1) has an arrangement groove (12) for arranging the push-pull rod (3). The push-pull rod (3) is also fitted with a locking plate (33), and the movable housing (1) is provided with a locking assembly (4) for locking the locking plate (33) to the movable housing (1). The locking assembly (4) has a first working position and a second working position. When the locking assembly (4) is in the first working position, the locking plate (33) is locked to the movable housing (1). When the locking assembly (4) is in the second working position, the locking plate (33) is disengaged from the movable housing (1).

2. The adjustable telescoping four-wheel trolley suitcase of claim 1, wherein, The inner wall of the movable housing (1) is provided with a locking groove (13). The locking assembly (4) includes two symmetrically arranged locking seats (41) that are slidably installed in the locking groove (13), a limiting post (42) for limiting the locking seats (41), a limiting plate (43) that is threadedly engaged with the limiting post (42), and an elastic piece (132) disposed in the locking groove (13) and used to drive the locking seats (41) to reset. The movable housing (1) is located in the locking groove. The groove (13) has an installation opening (131) and the locking plate (33) has a locking opening (331) that corresponds to the installation opening (131). The locking seat (41) has a locking block (412) that extends out of the installation opening (131) and the locking block (412) has an abutting surface (4121) that abuts against the locking plate (33). The locking seat (41) has a waist-shaped groove (411) that cooperates with the limiting post (42).

3. A four-wheeled draw-bar suitcase with adjustable push-pull bar according to claim 2, characterized in that, The locking seat (41) has an arc-shaped plate (413) that cooperates with the elastic piece (132). The elastic piece (132) is arranged on both sides of the arc-shaped plate (413) and abuts against both sides of the arc-shaped plate (413), causing the two ends of the arc-shaped plate (413) to always have a tendency to move towards the middle.

4. The adjustable telescoping pull rod four-wheeled duffel of claim 1, wherein, The movable housing (1) is also provided with a cup holder assembly (5) at the arrangement slot (12). The cup holder assembly (5) includes a cup holder sleeve (51) rotatably connected to the movable housing (1) at its top end, a cup holder base (52) rotatably connected to the movable housing (1) at its bottom end, and a transmission link (53) rotatably connecting the cup holder sleeve (51) and the cup holder base (52). The bottom of the cup holder sleeve (51) is provided with a lifting handle (511) for lifting the cup holder sleeve (51).

5. The adjustable telescoping four-wheel dolly of claim 4, wherein, The cup holder base (52) is provided with a limiting protrusion ring (521) on the side facing the movable box (1) in a circumferential direction, and the cup holder base (52) is provided with a relief groove (522) at the limiting protrusion ring (521) for the arrangement of the transmission link (53).

6. The adjustable telescoping pull rod four-wheeled duffel of claim 1, wherein, The movable housing (1) includes movable rollers (14), a bottom plate (15), a rear side plate (16) having the arrangement groove (12), a front side plate (17) arranged opposite to the rear side plate (16), and a connecting side plate (18) connecting the rear side plate (16) and the front side plate (17); the movable rollers (14) are symmetrically arranged at the bottom of the front side plate (17) and the rear side plate (16); the connecting side plate (18) includes one end connected to the bottom plate (16). The front side plate (17) is rotatably connected to a first side plate (181) and a second side plate (182) is rotatably connected at one end to the first side plate (181) and at the other end to the rear side plate (16); the rear side plate (16) has an extension (161) extending in the direction away from the push-pull rod (3), and one end of the bottom plate (15) of the box is rotatably connected to the bottom of the front side plate (17) and the other end abuts against the top surface of the extension (161).

7. A four-wheeled trolley case with adjustable push-pull rod according to claim 6, characterized in that, The top of the connecting side plate (18) is provided with a sliding groove (184) and a locking member (185) is slidably installed in the sliding groove (184). The sliding groove (184) is biasedly arranged on the top of the connecting side plate (18). When the locking member (185) is located on one side of the connection between the first side plate (181) and the second side plate (182), the first side plate (181) and the second side plate (182) can be folded.

8. A four-wheeled trolley case with an adjustable push-pull rod according to claim 6, characterized in that, The movable housing (1) is further provided with a partition plate (19) in the accommodating cavity (11), and the side wall of the partition plate (19) abuts against the extension (161) of the rear side plate (16), and a storage gap is formed between the partition plate (19) and the rear side plate (16) for placing the mounting cover plate (2).

9. A four-wheeled trolley case with adjustable push-pull rod according to claim 6, characterized in that, The top surface of the mounting cover plate (2) has a mounting groove (21) at one end away from the rear side plate (16). The mounting cover plate (2) has a cover plate handle (22) at the mounting groove (21) and a snap-fit ​​block (221) is provided around the cover plate handle (22). A snap-fit ​​groove (23) that cooperates with the snap-fit ​​block (221) is provided at the mounting groove (21).

10. A four-wheeled trolley case with an adjustable push-pull rod according to claim 6, characterized in that, A fastener (6) for restricting the rotation of the connecting side plate (18) is also provided between the rear side plate (16) and the connecting side plate (18).

Images