Luggage case

Abstract

The invention discloses a luggage case which comprises a case body, a pull rod is arranged on the rear side of the case body, the pull rod is composed of one rod body or more than two connected rod bodies, a rotating part is arranged at the bottom of the pull rod or between any two adjacent rod bodies, and after the pull rod is pulled out, the rod bodies rotate by a certain angle through the rotating part and incline towards the rear side of the case body. The pull rod of the luggage case can incline towards the rear side of the case body, so that a certain angle is formed between the pull rod and the case body, a pushing stress point is moved downwards, the pushing stress point is prevented from being located at the top of the pulled pull rod, the problem that the luggage case is easy to overturn due to the high stress point in the pushing process is solved, and the luggage case is convenient to push.

Description

Technical Field

[0001] The present invention relates to a luggage case, belonging to the technical field of luggage cases. Background Art

[0002] As a widely used load-carrying tool during travel, the functional requirements of luggage cases are developing in a diversified direction. At present, the pull rods of luggage cases all adopt a vertical design, that is, the pull rod is vertically arranged at the rear side of the luggage case body. When pulling the luggage case, generally both the luggage case and the pull rod are inclined, so as to drag the luggage case. At this time, the pull rod needs to bear radial force and is easily damaged after long-term use. Moreover, this structure is not suitable for pushing, mainly because the force application point for pushing is located at the top of the pull rod after it is pulled up. When pushing the case body at the force application point, it is extremely easy to cause the case body to tip over. Moreover, in current usage scenarios, the top of the luggage case often needs to undertake multiple functions such as placing packages, sitting temporarily or serving as a workbench. Especially in the scenario of traveling with children, the temporary liberation of the parents' hands can be achieved by having children sit on the luggage case. For such requirements, as disclosed in a Chinese patent with the authorization announcement number CN222090994U for a multifunctional luggage case, a back plate that can rotate forward is provided at the rear side of the case body to improve the riding safety. The pull rod and the backrest are both located at the rear side of the case body, and the pull rod adopts a vertical design. In addition to the above technical problems, the following technical problems also exist: First, after the back plate is flipped forward and stands upright in front of the top of the case body, such a structure will directly interfere with the case cover opening and closing mechanism, resulting in obstruction of the case body opening and closing operation; Second, when adopting a rear-mounted riding layout, the child is in the area behind the pull rod, making it difficult for the parent to synchronously observe the child's state and the road conditions ahead during the towing process; Third, in the pushing mode, due to the lack of rear support for this structure, it is easy to cause the center of gravity of the occupant or the package to move backward, posing a risk of tipping over. Fourth, since the pull rod is vertically connected to the case body, it is difficult to keep the case body upright when pushing on a flat ground such as an airport, resulting in frequent shaking and direction deviation of the case body during the pushing process. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a luggage case that is convenient to push, expands the functionality of the luggage case, and improves the safety of the luggage case.

[0004] To achieve the above purpose, the technical solution of the present invention is:

[0005] A luggage case, comprising a case body, a pull rod is arranged at the rear side of the case body. The pull rod is composed of one rod body or two or more connected rod bodies. A rotating member is arranged at the bottom of the rod body or between any two adjacent rod bodies. After the pull rod is pulled out, the rod body (including the whole rod body or a part of the rod body, such as the upper rod body) rotates a certain angle through the rotating member and inclines towards the rear side of the case body.

[0006] Further, the drawbar consists of a rod body, and the rod body is connected to the track through a rotating member, and the rod body moves up and down along the track. The rod body moves up and down along the track through the rotating member. After the rod body is pulled out, the rod body rotates on the track through the rotating member, and the rod body inclines towards the rear side of the box body, forming a certain angle between the rod body and the track.

[0007] Further, the drawbar consists of two connected rod bodies. The upper rod body moves up and down on the lower rod body. The lower rod body is connected to the track through a rotating member, and the lower rod body moves up and down along the track. The lower rod body moves up and down along the track through the rotating member. After the lower rod body is pulled out, the lower rod body rotates on the track through the rotating member, and the drawbar inclines towards the rear side of the box body, forming a certain angle between the drawbar and the track; the upper rod body moves up and down on the lower rod body to realize the telescoping of the drawbar.

[0008] Specifically, the upper rod body is located inside the lower rod body.

[0009] Specifically, a secondary track is provided on the lower rod body, and the upper rod body moves up and down on the lower rod body along the secondary track.

[0010] Further, the drawbar consists of two connected rod bodies. The lower rod body is connected to the track and moves up and down along the track. A secondary track is provided on the lower rod body. The upper rod body is connected to the secondary track of the lower rod body through a rotating member, and the upper rod body moves on the secondary track through the rotating member. When the drawbar is pulled, the upper rod body moves up and down on the secondary track through the rotating member, and the lower rod body moves up and down along the track. After the upper rod body is pulled out, the upper rod body rotates on the secondary track through the rotating member, and the upper rod body inclines towards the rear side of the box body, forming a certain angle between the upper rod body and the lower rod body.

[0011] The rotating member includes a first joint and a second joint. Both the first joint and the second joint have an open inner cavity structure. The opening of the first joint and the opening of the second joint are rotationally connected together through a central axis. The inner cavity of the first joint has a first internal tooth, and the inner cavity of the second joint has a second internal tooth. Inside the inner cavities of the first joint and the second joint, a locking member is provided on the central axis. The outer surface of the locking member is tooth-shaped. An elastic member is provided between the locking member and the second joint. The elastic member pushes the locking member to be located between the first joint and the second joint, so that the tooth shape on the outer surface of the locking member meshes with the first internal tooth and the second internal tooth; an unlocking mechanism is provided inside the inner cavity of the first joint. The unlocking mechanism pushes the locking member, so that the tooth shape on the outer surface of the locking member disengages from the first internal tooth, and the first joint and the second joint can rotate.

[0012] Specifically, the elastic member is a spring, and the spring is sleeved on the central axis.

[0013] The unlocking mechanism includes an unlocking member. The unlocking member is arranged on the central axis. On the side away from the locking member, a guiding groove is provided on the unlocking member. An arc-shaped guiding block is provided in the inner cavity of the first joint. The guiding block has a rising surface, and the shapes of the guiding groove and the guiding block correspond to each other. The unlocking member is connected with a cord extending outwards. The cord pulls the unlocking member to rotate along the central axis, and the unlocking member moves towards the locking member side along the rising surface of the guiding block, so that the tooth shape on the outer surface of the locking member disengages from the first internal teeth, and the first joint and the second joint can rotate.

[0014] As another unlocking method, the unlocking mechanism includes one or more push rods. The rotating member is provided with push rod through holes corresponding to the push rods. The push rods push the locking member through the push rod through holes, so that the tooth shape on the outer surface of the locking member disengages from the first internal teeth, and the first joint and the second joint can rotate.

[0015] Further, an unlocking cover is provided outside the first joint, and multiple push rods are connected to the unlocking cover.

[0016] In order to limit the push rod and prevent the push rod from disengaging from the inner cavity, the push rod is provided with a push rod convex part, and the push rod convex part is located in the inner cavity.

[0017] In order to limit the maximum rotation angle of the first joint and the second joint, the second joint is provided with a protruding part. The first joint has a toothless section for the protruding part to penetrate into, and the protruding part is smaller than the toothless section. Since the protruding part is smaller than the toothless section, the toothless section can rotate a certain stroke (angle) driven by the first joint. When rotating to a certain stroke, due to the side wall of the toothless section blocking the protruding part, the rotation angle of the first joint and the second joint is limited.

[0018] As another implementation manner of the rotating member, the rotating member includes a first joint and a second joint. The first joint and the second joint are rotationally connected together through a central axis. The first joint is provided with a locking pin sliding groove. A locking pin slider is arranged in the locking pin sliding groove. A locking pin is arranged on the locking pin slider. The locking pin is located in a locking groove. The locking groove is arranged on the second joint. The locking groove has a connected free part and a locking part. The free part is larger than the locking pin. The locking pin slider is provided with an elastic member. The elastic member pushes the locking pin slider to slide in the locking pin sliding groove, so that the locking pin is located in the locking part. When the locking pin is located in the locking part, the first joint and the second joint are locked. When the locking pin is located in the free part, the first joint and the second joint can rotate.

[0019] Further, a plurality of locking parts are provided.

[0020] Further, a cord (steel wire) extending outwards is connected to the locking pin slider. The cord pulls the locking pin slider to slide along the locking pin sliding groove, so that the locking pin is located in the free part.

[0021] Further, the second joint is provided with a retaining wall, and the first joint is contained within the retaining wall.

[0022] In order to define the maximum rotation angles of the first joint and the second joint, the retaining wall has a blank section, the first joint has a stop block extending into the blank section, and the stop block is smaller than the blank section. Since the stop block is smaller than the blank section, the stop block can rotate a certain stroke (angle) under the drive of the first joint. When it rotates to a certain stroke, due to the blocking of the retaining wall on the stop block, the rotation angles of the first joint and the second joint are defined.

[0023] In order to define the rotation angles of the first joint and the second joint, the second joint is provided with a protruding portion, the first joint has a rotation-limiting hole for the protruding portion to extend into, and the protruding portion is smaller than the rotation-limiting hole.

[0024] In order to facilitate the unlocking of the rope-like object, an unlocking handle is provided on the pull rod, and the unlocking handle is connected to the rope-like object. Specifically, the unlocking handle is a rod sleeve, and the rod sleeve is sleeved on the pull rod.

[0025] In order to limit the rotation of the rotating member, the rotating member is provided with a locking mechanism, and the position of the rotating member is locked by the locking mechanism to prevent the locking member from moving up and down.

[0026] Specifically, the locking mechanism includes a pin slot, a pin is arranged in the pin slot, the pin reciprocates along the pin slot, the pin is provided with an elastic member (spring), and the elastic member pushes the pin out of the rotating member to lock the pin in the pin hole.

[0027] Further, the pin has an unlocking slot, the unlocking slot has an unlocking inclined surface, an unlocking pin is arranged above the pin, the bottom of the unlocking pin is bevel-shaped, and the unlocking pin is arranged in the unlocking pin sliding slot and moves along the unlocking pin sliding slot.

[0028] In order to provide support for the items on the luggage case, a backrest is provided on the top of the case body. The backrest includes a back plate, and side plates are arranged on both sides of the back plate. The side plates are rotatably connected to both sides of the case body. After the backrest is flipped towards the pull rod side, the bottom of the back plate supports on the top of the case body, and the back of the back plate faces the pull rod. When not in use, the back plate is in a horizontal state on the top of the case body. When in use, the backrest is flipped towards the pull rod side, the back plate is transformed from a horizontal state to a vertical state or an approximately vertical state and stands on the top of the case body, the bottom of the back plate supports on the top of the case body, and the back of the back plate faces the pull rod.

[0029] Specifically, the side plates are rotatably connected to both sides of the case body through backrest rotating shafts.

[0030] In order to store the backrest when not in use and prevent the backrest from affecting the use of the luggage when leaning against the top of the box body, a backrest storage groove is provided at the top of the box body.

[0031] In the present invention, the backrest is provided on the top of the box and is turned over backward through a rotating shaft. This structural design has three technical advantages: First, the rearward flipping path avoids the opening and closing trajectory of the box lid, ensuring that the opening and closing function of the box body is not interfered; Second, after the backrest is unfolded, a rearward support surface and a lateral support surface are formed, which can effectively restrain the position of the occupant or the package and prevent the dumping phenomenon caused by inertia; Third, in the pushing mode, the child is located in the area near the operator on the front side of the box body, which is convenient for real-time monitoring and interaction, significantly improving the safety and convenience of use.

[0032] The pull rod of the luggage in the present invention can be inclined backward to the box body, forming a certain angle between the pull rod and the box body, moving the force application point of pushing downward, avoiding the force application point of pushing being located at the top of the pull rod after being pulled up, solving the problem that the high force application point during pushing is likely to cause the luggage to tip over, and facilitating the pushing of the luggage. Especially when there is a child sitting on the luggage, the safety is improved. Moreover, the structural position design of the backrest and the pull rod ensures that the pusher can always observe the occupant or the package on the backrest while ensuring the safety of pushing the luggage. The rotating part is small in size, realizing the rotation and position locking of the pull rod, and is convenient for resetting, expanding the functionality of the luggage. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0034] Figure 1 It is a schematic structural diagram of a double-pull rod luggage.

[0035] Figure 2 It is a schematic structural diagram of the use state of a double-pull rod luggage.

[0036] Figure 3 It is a schematic structural diagram of a double-pull rod.

[0037] Figure 4 It is a schematic structural diagram of the use state of a single-pull rod luggage.

[0038] Figure 5 It is a schematic structural diagram of a first joint.

[0039] Figure 6 It is a schematic structural diagram of a second joint.

[0040] Figure 7 It is a schematic structural diagram of an unlocking part.

[0041] Figure 8 It is a schematic structural diagram of a locking part.

[0042] Figure 9Schematic cross-sectional view of the rotating part.

[0043] Figure 10 Schematic view of the connection structure between the second joint and the track.

[0044] Figure 11 Schematic cross-sectional view of the push rod unlocking mechanism.

[0045] Figure 12 Schematic view of the first joint structure of the push rod unlocking mechanism.

[0046] Figure 13 Schematic view of the unlocking cover structure of the push rod unlocking mechanism.

[0047] Figure 14 Schematic view of the first joint structure of the locking pin rotating part.

[0048] Figure 15 Schematic view of the second joint structure of the locking pin rotating part.

[0049] Figure 16 Schematic view of the structure of another locking pin rotating part.

[0050] Figure 17 Schematic view of the first joint structure of another locking pin rotating part.

[0051] Figure 18 Schematic view of the locking pin and slider structure of another locking pin rotating part.

[0052] Figure 19 Schematic view of the second joint structure of another locking pin rotating part.

[0053] Figure 20 Schematic cross-sectional view of another locking pin rotating part.

[0054] Figure 21 Schematic view of the track structure. Detailed implementation method

[0055] As Figure 1 、 2 、shown in Figure 4, the luggage includes a box body 11 and a box cover 12. At the bottoms of the box body 11 and the box cover 12, four universal wheels 13 are provided. The four universal wheels 13 are distributed at the four corners of the bottom of the luggage, with two of them located at the bottom of the box cover 12 and two of them located at the bottom of the box body 11. Alternatively, the four universal wheels 13 are only provided at the bottom of the box body 11.

[0056] The six faces of the box body 11 are respectively the front side, the rear side, the left side, the right side, the top and the bottom. The box cover 12 is located on the front side of the box body 11. A pull rod 2 is arranged on the rear side of the box body 11. The pull rod 2 can be one, or two connected at the top. A backrest is arranged on the top of the box body 11. The backrest includes a back plate 91. Side plates 92 are arranged on both sides of the back plate 91. The two side plates 92 on both sides are respectively rotatably connected to both sides of the box body 11 (i.e., the right side and the left side of the box body) through a backrest rotating shaft 93. When not in use, the back plate 91 is in a horizontal state on the top of the box body 11. When in use, after the backrest rotates around the backrest rotating shaft 93 towards the pull rod 2 side (i.e., the rear side of the box body), the back plate 91 is transformed from a horizontal state to a vertical state or an approximately vertical state and stands on the top of the box body 11. At this time, the bottom of the back plate 91 supports on the top of the box body 11, and the back of the back plate 91 faces the pull rod 2. A backrest storage groove 94 can be arranged on the top of the box body 11. When the backrest is not in use, the back plate 91 is in a horizontal state in the backrest storage groove 94 on the top of the box body 11. As an implementation manner, the box cover 12 of the box body 11 is located on the front side, the pull rod 2 is located on the rear side, and the distance from the front side to the rear side of the box body 11 is greater than the distance from the left side to the right side.

[0057] As shown in Figure 1 , 2 , and Figure 3, a handle is arranged on the rear side of the box body. There are two pull rods at the bottom of the handle. The two pull rods are respectively connected to both sides of the handle (i.e., the right side and the left side of the handle). Two left and right tracks 3 are arranged on the rear side of the box body. Each pull rod has two connected rod bodies (an upper rod body 22 and a lower rod body 21). The end of the upper rod body 22 is connected to the handle. The upper rod body 22 is arranged in the lower rod body 21 (such as the common connection method of an inner tube and an outer tube) and slides up and down along the lower rod body 21. The lower rod body 21 of each pull rod is respectively installed on the track 3 through a rotating part, and the lower rod body 21 moves up and down along the track 3. When the handle is pulled up, after the rotating part moves to the top of the track 3, the pull rod can rotate a certain angle towards the rear side of the box body 11 through the rotating part, so that the pull rod inclines towards the rear side direction of the box body 11, and a certain angle is formed between the pull rod and the track 3. Of course, a secondary track can be arranged on one side of the lower rod body 21. The secondary track is the same as the track 3 (or other forms of tracks), and the upper rod body 22 is connected to the secondary track to realize the up and down sliding of the upper rod body 22 along the lower rod body 22. As another implementation manner, the rotating part can be arranged between the upper rod body 22 and the lower rod body 21, that is, the upper rod body 22 is connected to the lower rod body 21 through the rotating part, and the lower rod body 21 is connected to the track 3. At this time, after the pull rod is pulled out (or pulled out halfway), the upper rod body 22 can rotate a certain angle towards the rear side of the box body 11 through the rotating part, so that the upper rod body 22 inclines towards the rear side direction of the box body 11, and a certain angle is formed between the upper rod body 22 and the track 3.

[0058] Of course, as shown in Figure 4As shown, only one pull rod can be provided at the bottom of the handle, and a track 3 is provided at the rear side of the box body. The pull rod has two connected rod bodies (upper rod body 22 and lower rod body 21). The connection method of the two rod bodies can also adopt the above-mentioned inner and outer tube connection method, and the upper rod body 22 is connected to the middle of the handle through the secondary track on the lower rod body 21. The upper rod body 22 is connected to the middle of the handle, and the lower rod body 21 is installed on the track through a rotating member. The track is located in the middle of the rear side of the box body 11. When the handle is pulled up, after the rotating member moves to the top of the track 3, the lower rod body 21 can rotate a certain angle towards the rear side of the box body 11 through the rotating member, so that the pull rod inclines towards the rear side of the box body 11, and a certain angle is formed between the pull rod and the track 3. Similarly, in this embodiment, the rotating member can be provided between the upper rod body 22 and the lower rod body 21.

[0059] As Figure 3 , 5 As shown in FIG. -10, the rotating member includes a first joint 4 and a second joint 5. The lower rod body 21 is connected to the first joint 4, and the second joint 5 is connected to the track 3 through a guide block 54 (similar to a slider), and the second joint 5 slides up and down along the track 3. Both the first joint 4 and the second joint 5 have an open inner cavity structure. The opening of the first joint 4 is rotationally connected to the opening of the second joint 5 through a central shaft 52. The inner cavity of the first joint 4 has a first internal tooth 41, and the inner cavity of the second joint 5 has a second internal tooth 51. Inside the inner cavities of the first joint 4 and the second joint 5, a locking member 7 is provided on the central shaft 52. The outer surface of the locking member 7 is tooth-shaped. A spring (or other type of elastic component) is provided between the locking member 7 and the bottom of the inner cavity of the second joint 5. The spring is sleeved on the central shaft 52. One end of the spring is the locking member 7, and the other end is the second joint 5. The spring is limited between the locking member 7 and the second joint 5. The spring pushes the locking member 7 to be located between the first joint 4 and the second joint 5, so that the tooth shape on the outer surface of the locking member 7 meshes with the first internal tooth 41 and the second internal tooth 51. At this time, it is in the locked state, and the first joint 4 and the second joint 5 cannot rotate.

[0060] An unlocking mechanism is provided in the inner cavity of the first joint. The unlocking mechanism pushes the locking member 7 to move along the central shaft, so that the tooth shape on the outer surface of the locking member 7 disengages from the first internal tooth 41. At this time, it is in the unlocked state. At this time, the spring is compressed, and the first joint 4 and the second joint 5 can rotate, and a certain angle can be formed between the pull rod and the track 3. Of course, the unlocking mechanism can also be provided in the inner cavity of the second joint 5. At this time, the spring is provided between the locking member 7 and the bottom of the inner cavity of the first joint 4. One end of the spring is the locking member 7, and the other end is the first joint 4. The spring is limited between the locking member 7 and the first joint 4. The spring pushes the locking member 7 to be located between the first joint 4 and the second joint 5, so that the tooth shape on the outer surface of the locking member 7 meshes with the first internal tooth 41 and the second internal tooth 51.

[0061] The unlocking mechanism pushes the locking member 7, causing the tooth profile on the outer surface of the locking member 7 to disengage from the first internal tooth 41. In this way, the first joint 4 and the second joint 5 can rotate. Without the force of the unlocking mechanism, the spring (such as restoring elastic deformation) pushes the locking member 7 to engage with the first internal tooth 41 and the second internal tooth 51, and the first joint 4 and the second joint 5 cannot rotate, that is, the angle between the locking rod and the track (or the upper and lower rod bodies). When the first joint 4 rotates, the locking member 7 can engage with different positions of the first internal tooth 41, which means that the rod has different locking states at different angles. Taking the rod having two locking states as an example, when the locking member 7 engages at one position of the first internal tooth 41, it is the straightened state of the rod (the rod body and the track 3 are parallel), and when the locking member 7 engages at another position of the first internal tooth 41, it is the inclined state of the rod (there is an included angle between the rod body and the track 3); or when the locking member 7 engages at one position of the first internal tooth 41, it is the first inclined state of the rod (the angle between the rod body and the track 3 is the first included angle), and when the locking member 7 engages at another position of the first internal tooth 41, it is the second inclined state of the rod (the angle between the rod body and the track 3 is the second included angle), and the first included angle is different from the second included angle. Of course, by engaging the locking member 7 with more positions of the first internal tooth 41, more diverse locking states of the rod can be provided.

[0062] As Figure 5 , 7 , 9 shows, the unlocking mechanism can be achieved in the following ways (not limited to the following several): The unlocking mechanism includes an unlocking member 6. The unlocking member 6 is arranged on the central axis 52 and is located inside the cavity of the first joint 4, on the side away from the locking member 7 (the bottom side of the cavity of the first joint 4). The unlocking member 6 is provided with a guiding groove 61. An arc-shaped guiding block 42 is arranged at the bottom of the cavity of the first joint 4. The guiding block 42 has an ascending surface (along the axial direction of the central axis 52), and the shape of the guiding groove 61 corresponds to the shape of the guiding block 42. A cord extends outwardly from the unlocking member 6. By pulling the cord, the unlocking member 6 rotates along the central axis 52. During rotation, due to the ascending surface of the guiding block 42 and the cooperation between the ascending surface and the guiding groove 61, the unlocking member 6 moves along the central axis 52 and moves towards the locking member 7 when rotating, thereby pushing the locking member 7 away from the first joint 4, and the first joint 4 and the second joint 5 can rotate. The cord is connected to the cord connection hole 62 of the unlocking member 6. The cord is a steel wire (or other types of cords). One end of the steel wire is connected to the cord connection hole 62 of the unlocking member 6, and the other end extends out of the first joint 4. The steel wire pulls the unlocking member 6 to rotate along the central axis 52, and the unlocking member 6 moves towards the second joint 5 side along the ascending surface of the guiding block 42. The unlocking member 6 pushes the locking member 7, causing the tooth profile on the outer surface of the locking member 7 to disengage from the first internal tooth 41. At this time, it is the unlocked state. At this time, the spring is compressed, the first joint 4 and the second joint 5 can rotate, and a certain angle can be formed between the rod and the track 3.

[0063] After the unlocking member 6 loses the pulling force of the steel wire, the spring returns to its original state, and the locking member 7 resets along the central axis 52, so that the teeth on the outer surface of the locking member 7 mesh with the first internal teeth 41 and the second internal teeth 51, restoring the locked state. At the same time, the locking member 7 also pushes the unlocking member 6 to move along the central axis 52. Specifically, the unlocking member 6 rotates in the reverse direction along the rising surface of the guiding block 42, realizing the overall rotation along the central axis 52, that is, moving to one side.

[0064] As Figure 5 , 6 shown, in order to limit the maximum rotation angle of the first joint 4 and the second joint 5, the first joint 4 has a toothless section, and the second joint 5 has a protruding portion 53 that extends into the toothless section. The protruding portion 53 is smaller than the toothless section. Since the protruding portion 53 is smaller than the toothless section, the toothless section can rotate a certain stroke (angle) under the drive of the first joint 4. When it rotates to a certain stroke, due to the side wall of the toothless section blocking the protruding portion 53, the rotation angles of the first joint 4 and the second joint 5 are limited.

[0065] As Figure 2 , 4 shown, in order to facilitate the unlocking of the rope-like object, the steel wire is arranged inside the lower rod body 21. The end of the steel wire is connected with an unlocking handle 23. The unlocking handle 23 is a rod sleeve, which is sleeved on the upper rod body 22. The rod sleeve slides on the upper rod body 22. Pushing the rod sleeve to slide upward along the upper rod body 22, the rod sleeve pulls the steel wire, thereby unlocking the locking member. Pushing the rod sleeve to reset, the locking member gets rid of the pulling force of the steel wire, and the spring returns to its original state, and then the locked state is restored. Of course, the rod sleeve can also be sleeved on the lower rod body 21, and the rod sleeve slides on the lower rod body 21 to pull the steel wire to unlock. Of course, the unlocking handle can also be other components that can displace a certain distance, as long as it can drive the steel wire to pull the unlocking member 6 to rotate along the central axis 52.

[0066] In order to limit the rotating member at the top of the track 3, the rotating member is provided with a locking mechanism. After the pull rod lifts the rotating member to move to the top of the track 3, the rotating member is locked on the track through the locking mechanism.

[0067] As Figure 9 , 10 shown, the locking mechanism is installed on the second joint 5, including a pin slot on the protruding portion 53. A pin 81 is arranged in the pin slot, and the pin 81 slides reciprocally along the pin slot. A spring (or other type of elastic component) is arranged at the tail end of the pin 81. One end of the spring is the pin 81, and the other end is the pin slot. The spring is limited between the pin 81 and the pin slot. The spring pushes the pin 81 out of the second joint 5, and the head end of the pin 81 is locked in the pin hole. The pin hole is arranged at the top of the track 3.

[0068] To unlock the locking mechanism, the latch pin 81 has an unlocking groove 82, the unlocking groove 82 has an unlocking inclined surface 83, an unlocking pin 84 is arranged above the unlocking inclined surface 83, the bottom of the unlocking pin 84 is bevel-shaped, the unlocking pin 84 is arranged in the unlocking pin sliding groove, and the unlocking pin 84 moves along the unlocking pin sliding groove. Press or strike the unlocking pin 84, the unlocking pin 84 inserts into the unlocking groove 82 along the unlocking pin sliding groove, the inclined surface at the bottom of the unlocking pin 84 pushes the unlocking inclined surface 83, the latch pin 81 slides along the latch pin groove, the latch pin 81 disengages from the latch pin hole, unlocking is achieved, and at this time the spring is compressed. After the pressure on the unlocking pin 84 disappears, the spring returns to its original state, pushes the latch pin 81 to move back to its original state, at this time the unlocking inclined surface 83 pushes the bevel-shaped surface, causing the unlocking pin 84 to move upward, and the spring pushes the head end of the latch pin 81 out of the second joint 5 and locks it in the latch pin hole.

[0069] A locking mechanism is arranged on the rotating member. Taking the locking of the lower rod body 21 as an example, the purpose of the locking mechanism is to fix the position of the lower rod body 21 after the lower rod body 21 is stretched out. By arranging a locking mechanism on the rotating member, the whole rotating member can be fixed to the track 3, thereby realizing the fixation of the position of the lower rod body 21. As a way to implement the locking mechanism, the locking mechanism can be a common locking component in the prior art. For example, the locking mechanism has a latch pin, a latch pin hole is arranged on the top of the track 3, and after the latch pin is inserted into the latch pin hole, the position between the locking mechanism and the track 3 is fixed, and the pull rod is limited at the top of the track 3. At this time, it is in the locked state and the rotating member cannot move on the track 3. When the latch pin disengages from the latch pin hole, at this time, it is in the unlocked state and the rotating member can move on the track 3.

[0070] As another unlocking mechanism, as Figures 11 - 13 shown, the unlocking mechanism includes an unlocking cover 553 outside the first joint 4. The unlocking cover 553 has four (of course, one or more can also be set) push rods 552. The four push rods 552 are sequentially arranged on the unlocking cover 553 along the circumferential direction of the central axis 52. The first joint 4 has a push rod through hole 551 corresponding to the push rod 552. The unlocking cover 553 is exposed on the first joint 4, and the push rod 552 on the unlocking cover 553 penetrates into the inner cavity of the first joint 4 through the push rod through hole 551. Press the unlocking cover 553, the push rod 552 pushes the locking member 7 to move along the central axis 52, so that the tooth shape on the outer surface of the locking member 7 disengages from the first internal teeth 41. At this time, it is in the unlocked state, and at this time the spring is compressed, and the first joint 4 and the second joint 5 can rotate, and a certain angle can be formed between the pull rod 2 and the track 3.

[0071] After there is no pressure on the unlocking cover 553, the spring returns to its original state, the locking member 7 resets along the central axis 52, the locking member 7 pushes the unlocking cover 553 to move and reset to the side of the first joint 4, so that the tooth shape on the outer surface of the locking member 7 meshes with the first internal teeth 41 and the second internal teeth 51, and the locked state is reset.

[0072] To limit the push rod and prevent it from disengaging from the inner cavity of the first joint, the head end of the push rod 552 has a push rod convex portion 554. The push rod convex portion 554 is located inside the inner cavity of the first joint 4 and can resist at the push rod perforation 551 to prevent the push rod 552 from disengaging from the inner cavity of the first joint 4. Specifically, the push rod convex portions 554 on the four push rods 552 are all bumps on one side of the push rod 552. When the unlocking cover 553 is installed on the first joint 4, the push rods 552 are respectively squeezed, and the push rods 552 bend towards the side away from the bumps, so that the bumps at the head ends of the push rods 552 can pass through the push rod perforations 551. After the bumps pass through the push rod perforations 551, the push rods 552 return to their original states, and the bumps resist at the push rod perforations 551 to prevent the push rods 552 from disengaging from the inner cavity of the first joint 4. Of course, the push rod convex portion 554 can also be other common limiting structures.

[0073] It should be noted that, for the convenience of pressing the unlocking cover, taking the bottom of the handle having two pull rods as an example, each pull rod is located outside the track (the side close to the side wall of the box body 11), and the two tracks are located between the two pull rods. The unlocking cover faces the side wall of the box body 11, and the side wall of the box body 11 is provided with an unlocking cover pressing hole. The unlocking cover 553 is exposed through the unlocking cover pressing hole so as to press the unlocking cover for unlocking operations. When there is only one pull rod at the bottom of the handle, the track connected to the rod body has an extension section protruding from the surface of the box body, so that the unlocking cover can be exposed or partially exposed, facilitating pressing the unlocking cover. Of course, on one side of the track 3, a pressing avoidance groove can also be provided on the box body, so that the unlocking cover can be exposed or partially exposed, and the unlocking cover is pressed through the pressing avoidance groove for unlocking operations.

[0074] As another implementation manner of the rotating member, such as Figure 14 , 15As shown, the rotating member includes a first joint 4 and a second joint 5. The lower rod body 21 is connected to the first joint 4. The second joint 5 is connected to the track 3 through a guide block 54 (similar to a slider), and the second joint 5 slides along the track 3. The first joint 4 and the second joint 5 are rotatably connected together by a central axis 52. Between the first joint 4 and the second joint 5, the second joint 5 has a locking groove 564, and the first joint 4 has a locking pin chute 561. The locking pin chute 561 is arranged in the up and down direction. A locking pin slider 562 is arranged in the locking pin chute 561. The locking pin slider 562 slides up and down along the locking pin chute 561. The locking pin slider 562 has a protruding locking pin 563. The locking pin 563 is located in the locking groove 564. The locking groove 564 has a communicating free portion and two (multiple can also be set) locking portions 565. The free portion is larger than the locking pin 563. The locking pin 563 can move freely within the free portion, that is, the locking pin 563 can rotate within its free portion. Above the locking pin slider 562, a spring (or other type of elastic component) is arranged. The spring is located in the locking pin chute 561. The spring is limited between the locking pin slider 562 and the inner wall of the locking pin chute 561. That is, one end of the spring is the locking pin slider 562, and the other end is the inner wall of the locking pin chute 561. The spring pushes the locking pin slider 562 to slide down along the locking pin chute 561. The locking pin slider 562 drives the locking pin 563 to move, so that the locking pin 563 is located in the locking portion 565 or in the free portion. When the locking pin 563 is located in the locking portion 565, it is in the locked state at this time, and the first joint 4 and the second joint 5 cannot rotate; when the locking pin 563 is located in the free portion, the locking pin 563 can rotate within the free portion. At this time, it is in the unlocked state, and the first joint 4 and the second joint 5 can rotate.

[0075] A rope-like object extending outward is connected to the locking pin slider 562. The rope-like object is a steel wire (or other type of rope-like object). One end of the steel wire is connected to the locking pin slider 562, and the other end extends out of the first joint 4. The steel wire pulls the locking pin slider 562 to slide up along the locking pin chute 561. The locking pin 563 disengages from the locking portion 565 and enters the free portion. At this time, it is in the unlocked state. At this time, the spring is compressed, and the first joint 4 and the second joint 5 can rotate, and a certain angle can be formed between the pull rod and the track 3.

[0076] After the locking pin slider 562 has no pulling force of the steel wire, the spring returns to its original state, pushing the locking pin slider 562 to reset downward along the locking pin chute 561, so that the locking pin 563 is located in the locking portion 565, which is the reset locked state.

[0077] The wire-pulled locking pin 563 is located within the free portion. The first joint 4 and the second joint 5 can rotate relative to each other. When the spring pushes the locking pin into the locking portion, the first joint 4 and the second joint 5 cannot rotate relative to each other, that is, the angle between the locking rod and the track (or the upper and lower rod bodies). The locking portion 565 has two settings, indicating that the rod has two locking states. One is the state where the rod is straightened (the rod body is parallel to the track 3), and the other is the state where the rod is inclined (there is an angle between the rod body and the track 3); or one is the first inclined state of the rod (the angle between the rod body and the track 3 is the first included angle), and the other is the second inclined state of the rod (the angle between the rod body and the track 3 is the second included angle), and the first included angle is different from the second included angle. Of course, more than three locking portions can also be provided to offer more diverse locking states of the rod.

[0078] As shown in Figure 14 and 15 In order to limit the maximum rotation angle of the first joint 4 and the second joint 5, the first joint 4 has a rotation-limiting hole, and the second joint 5 has a protruding portion 53 that extends into the rotation-limiting hole. The protruding portion 53 is smaller than the rotation-limiting hole. Since the protruding portion 53 is smaller than the rotation-limiting hole, the rotation-limiting hole can rotate a certain stroke (angle) under the drive of the first joint 4. When it rotates to a certain stroke, due to the side wall of the rotation-limiting hole blocking the protruding portion 53, the rotation angle of the first joint 4 and the second joint 5 is limited.

[0079] As another implementation manner of the rotating member, as shown in Figures 16 - 20 The rotating member includes a first joint 4 and a second joint 5. The lower rod body 21 is connected to the first joint 4, and the second joint 5 is connected to the track 3 through a guide block 54 (similar to a slider), and the second joint 5 slides along the track 3. The second joint 5 has a retaining wall. The end of the retaining wall has a wall plate. The wall plate, the retaining wall, and the second joint 5 are an integral structure. The first joint 4 is located within the retaining wall and between the second joint 5 and the wall plate. The first joint 4 is rotationally connected to the second joint 5 through a central axis. The retaining wall has a blank section, and the first joint has a stop block. The stop block is smaller than the blank section to facilitate the movement of the stop block within the blank section. Since the stop block is smaller than the blank section, the stop block can rotate a certain stroke (angle) under the drive of the first joint 4. When it rotates to a certain stroke, due to the retaining wall blocking the stop block, the rotation angle of the first joint 4 and the second joint 5 is limited.

[0080] The first joint 4 has a locking pin sliding hole 571 which is arranged in the vertical direction. A locking pin slider 572 is arranged in the locking pin sliding hole 571 and slides up and down along the locking pin sliding hole 571. The locking pin slider 572 has a locking pin slider connection hole, and a locking pin 573 is arranged in the locking pin slider connection hole. Both ends of the locking pin 573 protrude from the locking pin slider connection hole. Waist-shaped holes 574 are respectively arranged on both sides of the first joint 4, and the locking pin 573 protrudes out of the first joint 4 through the waist-shaped holes 574. When the locking pin slider 572 slides up and down along the locking pin sliding hole 571, the locking pin 573 displaces up and down in the waist-shaped holes 574. On both sides of the first joint 4, locking grooves 581 are arranged on both the second joint 5 and the wall plate. Each side of the locking groove 581 has a connected free part and two (or multiple) locking parts 582. The free part is larger than the locking pin 573, that is, the locking pin 573 can rotate within its free part. The locking grooves 581 on both sides are symmetrically arranged. A spring (or other type of elastic component) is arranged above the locking pin slider 572. The spring is located in the locking pin sliding hole 571 and is limited between the locking pin slider 572 and the locking pin sliding hole 571. That is, one end of the spring is the locking pin slider 572, and the other end is the locking pin sliding hole 571. The spring pushes the locking pin slider 572 to slide down along the locking pin sliding hole 571, and the locking pin slider 572 drives the locking pin 573 to move, so that the locking pin 573 is located in the locking part 582 or the free part. When the locking pin 573 is located in the locking part 582, it is in the locked state at this time, and the first joint 4 and the second joint 5 cannot rotate; when the locking pin 573 is located in the free part, the locking pin 573 can rotate within the free part, and it is in the unlocked state at this time, and the first joint 4 and the second joint 5 can rotate

[0081] A rope-like object extending outward is connected to the locking pin slider 572. The rope-like object is a steel wire (or other type of rope-like object). One end of the steel wire is connected to the locking pin slider 572, and the other end extends out of the first joint 4. The steel wire pulls the locking pin slider 572 to slide up along the locking pin sliding hole 571. The locking pin sliding hole 571 drives the locking pin 573, and the locking pin 573 disengages from the locking part 582 and enters the free part. At this time, it is in the unlocked state. At this time, the spring is compressed, and the first joint 4 and the second joint 5 can rotate, and a certain angle can be formed between the pull rod and the track 3.

[0082] After the locking pin slider 572 has no pulling force of the steel wire, the spring returns to its original state and pushes the locking pin slider 572 to reset downward along the locking pin sliding hole 571, so that the locking pin 573 is located in the locking part 582, which is the reset locked state.

[0083] Such as Figure 17 、 19As shown in FIGS. 20, in order to limit the maximum rotation angles of the first joint 4 and the second joint 5, the first joint 4 has a rotation-limiting hole, and the second joint 5 has a protruding portion 53 that extends into the rotation-limiting hole. The protruding portion 53 is smaller than the rotation-limiting hole. Since the protruding portion 53 is smaller than the rotation-limiting hole, the rotation-limiting hole can rotate a certain stroke (angle) under the drive of the first joint 4. When it rotates to a certain stroke, due to the side wall of the rotation-limiting hole blocking the protruding portion 53, the rotation angles of the first joint 4 and the second joint 5 are limited.

[0084] As another implementation manner of the rotating member, the rotating member can be a common rotating component in the prior art. For example, the rotating member is divided into two parts (i.e., the first rotating seat and the second rotating seat), and the two parts are rotatably connected to each other (such as connected by a rotating shaft). One part is connected to the lower rod body, and the other part is connected to the track through a guide block. In this way, when the pull rod is pulled to the top of the track and the pull rod is moved towards the rear side of the box body, the lower rod body rotates through the rotating member, and at this time, the two parts of the rotating member rotate. Of course, a plurality of pin holes can be provided on both parts of the rotating member, and pins are inserted into different pin holes of the two parts to fix the two parts (i.e., to lock the rotating member and prevent it from rotating). Of course, the rotating member can also be other components that can rotate a certain angle. Preferably, this component can fix the angle after rotation (the pull rod is always stressed in one direction).

[0085] As another embodiment, taking the example that only one pull rod is provided at the bottom of the handle, a track is provided in the middle of the rear side of the box body, and a pull rod is provided at the bottom of the handle. The pull rod only has one rod body, and the rod body is connected to the track through any one of the above rotating members. The rod body moves up and down along the track, and the rod body can rotate a certain angle towards the rear side of the box body through the rotating member, so that the rod body inclines towards the rear side of the box body, and an angle is formed between the rod body and the track. Of course, two pull rods can also be provided at the bottom of the handle, and two left and right tracks are provided at the rear side of the box body. Two pull rods are provided at the bottom of the handle, and the two pull rods are respectively connected to both sides of the handle. Each pull rod only has one rod body, and the rod bodies of each pull rod are respectively connected to the track through the rotating member. The rod bodies move up and down along the track. When the handle is pulled up, after the rotating member moves to the top of the track, the rod body can rotate a certain angle towards the rear side of the box body through the rotating member, so that the rod body inclines towards the rear side of the box body, and an angle is formed between the rod body and the track.

[0086] Of course, the pull rod may also have three or more connected rod bodies, and any one of the above-mentioned rotating members may be provided between any two adjacent rod bodies so that a certain angle can be formed between the adjacent rod bodies. Of course, multiple rotating members may also be provided on the pull rod. Taking three connected rod bodies as an example, the lower rod body is connected to the track through a rotating member, and the lower rod body moves up and down along the track. The lower rod body rotates to one side of the track through the rotating member, so that a certain angle is formed between the lower rod body and the track. The middle rod body is connected to the lower rod body through a rotating member, and the middle rod body moves up and down along the lower rod body. The middle rod body rotates to one side of the lower rod body through the rotating member, so that a certain angle is formed between the middle rod body and the lower rod body. The upper rod body moves up and down along the middle rod body; or the lower rod body is connected to the track, and the lower rod body moves up and down along the track. The middle rod body is connected to the lower rod body through a rotating member, and the middle rod body moves up and down along the lower rod body. The middle rod body rotates to one side of the lower rod body through the rotating member, so that a certain angle is formed between the middle rod body and the lower rod body. The upper rod body is connected to the middle rod body through a rotating member, and the upper rod body moves up and down along the middle rod body. The upper rod body rotates to one side of the middle rod body through the rotating member, so that a certain angle is formed between the upper rod body and the middle rod body.

[0087] As an implementation manner of the track, as Figure 21 shown, the track may be arranged inside the square tube, on the inner wall of one side of the square tube. The pull rod (or the upper rod body) is connected to the track through a rotating member. When the pull rod moves up and down along the track, the rotating member moves up and down inside the square tube. When the rotating member moves to the top of the track, the rotating member completely extends out or partially extends out of the square tube. The pull rod can rotate on the track through the rotating member so that the pull rod tilts towards the rear side of the box body. Of course, this structure may also be adopted for the secondary track to realize the up and down movement of the rotating member along the secondary track and the rotation of the rotating member on the secondary track.

[0088] The above embodiments do not limit the present invention in any way. All technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A luggage case, comprising a case body, wherein a pull rod is arranged at the rear side of the case body, and is characterized in that: The pull rod is composed of a rod body or two or more connected rod bodies. A rotating member is provided at the bottom of the pull rod or between any two adjacent rod bodies. After the pull rod is pulled out, the rod body rotates by a certain angle through the rotating member and inclines towards the rear side of the box body.

2. The suitcase according to claim 1, characterized in that: The pull rod is composed of a single rod body, and the rod body is connected to the track through a rotating member, and the rod body moves up and down along the track.

3. The trunk according to claim 1, characterized in that: The pull rod is composed of two connected rod bodies. The upper rod body moves up and down on the lower rod body. The lower rod body is connected to the track through a rotating member, and the lower rod body moves up and down along the track.

4. The trunk according to claim 3, characterized in that: The upper rod body is located inside the lower rod body.

5. The trunk according to claim 3, wherein: A secondary track is provided on the lower rod body, and the upper rod body moves up and down on the lower rod body along the secondary track.

6. The trunk according to claim 1, characterized in that: The pull rod is composed of two connected rod bodies. The lower rod body is connected to the track and moves up and down along the track. A secondary track is provided on the lower rod body. The upper rod body is connected to the secondary track of the lower rod body through a rotating member, and the upper rod body moves on the secondary track through the rotating member.

7. The trunk according to any one of claims 1-6, characterized in that: The rotating member includes a first joint and a second joint. Both the first joint and the second joint have an open inner cavity structure. The opening of the first joint and the opening of the second joint are rotationally connected together through a central axis. The inner cavity of the first joint has a first internal tooth, and the inner cavity of the second joint has a second internal tooth. Inside the inner cavities of the first joint and the second joint, a locking member is provided on the central axis. The outer surface of the locking member is tooth-shaped. An elastic member is provided between the locking member and the second joint. The elastic member pushes the locking member to be located between the first joint and the second joint, so that the tooth shape on the outer surface of the locking member meshes with the first internal tooth and the second internal tooth. An unlocking mechanism is provided inside the inner cavity of the first joint. The unlocking mechanism pushes the locking member, so that the tooth shape on the outer surface of the locking member disengages from the first internal tooth.

8. The trunk according to claim 7, characterized in that: The elastic member is a spring, and the spring is sleeved on the central axis.

9. The trunk according to claim 7, characterized in that: The unlocking mechanism includes an unlocking member. The unlocking member is provided on the central axis, on the side away from the locking member. A guiding groove is provided on the unlocking member. An arc-shaped guiding block is provided on the inner cavity of the first joint. The guiding block has a rising surface. The shapes of the guiding groove and the guiding block correspond. The unlocking member is connected with a cord extending outwards. The cord pulls the unlocking member to rotate along the central axis. The unlocking member moves towards the locking member side along the rising surface of the guiding block, so that the tooth shape on the outer surface of the locking member disengages from the first internal tooth.

10. The trunk according to claim 7, characterized in that: The unlocking mechanism includes one or more push rods. The rotating member is provided with push rod through holes corresponding to the push rods. The push rods push the locking member through the push rod through holes, so that the tooth shape on the outer surface of the locking member disengages from the first internal tooth.

11. The trunk according to claim 10, characterized in that: An unlocking cover is provided outside the first joint, and multiple push rods are connected to the unlocking cover.

12. The trunk according to claim 10, characterized in that: The push rod is provided with a push rod convex portion, and the push rod convex portion is located inside the inner cavity.

13. The trunk according to claim 7, characterized in that: A protruding portion is provided inside the inner cavity of the second joint. The inner cavity of the first joint has a toothless section for the protruding portion to penetrate into. The protruding portion is smaller than the toothless section.

14. The trunk according to any one of claims 1-6, characterized in that: The rotating member includes a first joint and a second joint. The first joint and the second joint are rotatably connected together by a central axis. The first joint is provided with a locking pin chute, and a locking pin slider is arranged in the locking pin chute. A locking pin is arranged on the locking pin slider. The locking pin is located in a locking groove. The locking groove is arranged on the second joint. The locking groove has a connected free portion and a locking portion. The free portion is larger than the locking pin. The locking pin slider is provided with an elastic member. The elastic member pushes the locking pin slider to slide in the locking pin chute, so that the locking pin is located in the locking portion. When the locking pin is located in the locking portion, the first joint and the second joint are locked. When the locking pin is located in the free portion, the first joint and the second joint can rotate.

15. The trunk according to claim 14, characterized in that: A plurality of the locking portions are provided.

16. The trunk according to claim 14, characterized in that: A cord-like object extending outward is connected to the locking pin slider. The cord-like object pulls the locking pin slider to slide along the locking pin chute, so that the locking pin is located in the free portion.

17. The trunk according to claim 14, characterized in that: The second joint is provided with a retaining wall, and the first joint is contained within the retaining wall.

18. The trunk according to claim 17, characterized in that: The retaining wall has a blank section, and the first joint has a stop block extending into the blank section. The stop block is smaller than the blank section.

19. The trunk according to claim 14, characterized in that: The second joint is provided with a protruding portion, and the first joint has a rotation-limiting hole for the protruding portion to extend into. The protruding portion is smaller than the rotation-limiting hole.

20. The trunk according to claim 9 or 16, characterized in that: An unlocking handle is arranged on the pull rod, and the unlocking handle is connected to the cord-like object.

21. The trunk according to claim 20, characterized in that: The unlocking handle is a rod sleeve, and the rod sleeve is sleeved on the pull rod.

22. The trunk according to any one of claims 1-6, characterized in that: The rotating member is provided with a locking mechanism.

23. The trunk according to claim 22, characterized in that: The locking mechanism includes a retaining pin groove. A retaining pin is arranged in the retaining pin groove. The retaining pin reciprocally slides along the retaining pin groove. The retaining pin is provided with an elastic member. The elastic member pushes the retaining pin out of the rotating member, so that the retaining pin is locked in the retaining pin hole.

24. The trunk according to claim 23, characterized in that: The retaining pin has an unlocking groove. The unlocking groove has an unlocking inclined surface. An unlocking pin is arranged above the retaining pin. The bottom of the unlocking pin is bevel-shaped. The unlocking pin is arranged in an unlocking pin chute, and the unlocking pin moves along the unlocking pin chute.

25. The trunk according to claim 1, characterized in that: A backrest is arranged on the top of the box body. The backrest includes a back plate. Side plates are arranged on both sides of the back plate. The side plates are rotatably connected to both sides of the box body. After the backrest is flipped towards the pull rod side, the bottom of the back plate supports on the top of the box body, and the back of the back plate faces the pull rod.

26. The trunk according to claim 25, characterized in that: The side plates are rotatably connected to both sides of the box body through backrest rotating shafts.

27. The trunk according to claim 25, wherein: A backrest storage groove is arranged on the top of the box body.

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