Luggage case

Abstract

The utility model 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 a rod body or more than two connected rod bodies, a rotating piece 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 piece 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 positioned at the top of the pulled pull rod, the problem that the luggage case is easy to overturn due to high stress point in the pushing process is solved, and the luggage case is convenient to push.

Description

Technical Field

[0001] This utility model relates to a suitcase and belongs to the field of suitcase technology. Background Technology

[0002] As a widely used means of carrying luggage during travel, suitcases are evolving towards more diverse functional requirements. Currently, suitcase handles are all designed vertically, meaning the handle is positioned vertically at the rear of the suitcase. When pulling, both the suitcase and the handle are typically tilted, causing the suitcase to be dragged. This forces the handle to withstand radial force, making it prone to damage over time. Furthermore, this structure is unsuitable for pushing, primarily because the point of force is located at the top of the handle after it's extended, making it highly susceptible to tipping over when pushing the suitcase. Moreover, in current usage scenarios, the top of the suitcase often serves multiple functions, such as storing packages, providing a temporary seat, or acting as a work surface, especially when traveling with children, as having children ride on the suitcase temporarily frees up parents' hands. To address such needs, a multi-functional suitcase disclosed in Chinese Patent Publication No. CN222090994U features a forward-rotating back panel on the rear of the suitcase to improve passenger safety. Both the pull rod and backrest are located at the rear of the suitcase, with the pull rod designed vertically. However, in addition to the aforementioned technical issues, this design also presents the following problems: First, the back panel flips forward and stands upright on the front of the top of the suitcase, directly interfering with the lid opening and closing mechanism, hindering the opening and closing operation. Second, in the rear-mounted seating layout, children are positioned behind the pull rod, making it difficult for parents to simultaneously observe the child's condition and the road conditions ahead while pulling the suitcase. Third, in push mode, the lack of rear support can easily cause the center of gravity of the passenger or luggage to shift backward, posing a risk of tipping over. Fourth, because the pull rod is vertically connected to the suitcase, it is difficult to maintain an upright position when pushing on flat surfaces such as airports, resulting in frequent swaying and directional deviation during pushing. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a luggage that is easy to push, which expands the functionality of the luggage and improves its security.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A suitcase includes a suitcase body, and a pull rod is provided on the rear side of the suitcase body. The pull rod is composed of one or more connected rods. A rotating component is provided at the bottom of the rod or between any two adjacent rods. After the pull rod is pulled out, the rod (including the entire rod or a part of the rod, such as the upper rod) rotates at a certain angle through the rotating component and tilts towards the rear of the suitcase body.

[0006] Furthermore, the pull rod consists of a rod body connected to the track via a rotating component, and the rod body moves up and down along the track. As the rod body moves up and down along the track via the rotating component, after being pulled out, it rotates on the track via the rotating component, tilting towards the rear of the housing, thus creating a certain angle between the rod body and the track.

[0007] Furthermore, the pull rod consists of two connected rods. The upper rod moves up and down on the lower rod, which is connected to a track via a rotating component. The lower rod moves up and down along the track. When the lower rod is pulled out, it rotates on the track via the rotating component, causing the pull rod to tilt towards the rear of the housing, creating an angle between the pull rod and the track. The upper rod moves up and down on the lower rod, thus achieving the extension and retraction of the pull rod.

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

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

[0010] Furthermore, the pull rod consists of two connected rods. The lower rod is connected to a track and moves up and down along the track. A secondary track is provided on the lower rod. The upper rod is connected to the secondary track of the lower rod via a rotating component, and the upper rod moves along the secondary track via the rotating component. When the pull rod is pulled, the upper rod moves up and down on the secondary track via the rotating component, and the lower rod moves up and down along the track. After the upper rod is pulled out, it rotates on the secondary track via the rotating component, tilting towards the rear of the housing, so that a certain angle is formed between the upper and lower rods.

[0011] A rotating component includes a first joint and a second joint, both of which have open inner cavities. The openings of the first and second joints are rotatably connected by a central shaft. 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. A locking component is provided on the central shaft within the inner cavities of the first and second joints. The outer surface of the locking component is toothed. An elastic component is provided between the locking component and the second joint. The elastic component pushes the locking component between the first and second joints, causing the teeth on the outer surface of the locking component to mesh with the first and second internal teeth. An unlocking mechanism is provided within the inner cavity of the first joint. The unlocking mechanism pushes the locking component, causing the teeth on the outer surface of the locking component to disengage from the first internal tooth, allowing rotation between the first and second joints.

[0012] Specifically, the elastic component is a spring, which is sleeved on the central shaft.

[0013] The unlocking mechanism includes an unlocking component, which is mounted on a central axis on the side away from the locking component. The unlocking component has a guide groove, and an arc-shaped guide block with a rising surface is provided on the inner cavity of the first joint. The guide groove and the guide block have corresponding shapes. The unlocking component is connected to an outwardly extending rope, which pulls the unlocking component to rotate along the central axis. The unlocking component moves along the rising surface of the guide block towards the locking component, causing the teeth on the outer surface of the locking component to disengage from the first inner teeth. 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 component is provided with a push rod through hole corresponding to the push rod. The push rod pushes the locking component through the push rod through hole, causing the outer surface teeth of the locking component to disengage from the first inner teeth. The first joint and the second joint can rotate.

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

[0016] To limit the push rod and prevent it from dislodging from the inner cavity, the push rod is provided with a push rod protrusion, which is located inside the inner cavity.

[0017] To limit the maximum rotation angle of the first and second joints, the second joint has a protrusion, and the first joint has a toothless section into which the protrusion extends. The protrusion is smaller than the toothless section. Because the protrusion is smaller than the toothless section, the toothless section can rotate a certain distance (angle) under the action of the first joint. After rotating to a certain distance, the sidewall of the toothless section blocks the protrusion, thus limiting the rotation angle of the first and second joints.

[0018] As another implementation of the rotating component, the rotating component includes a first joint and a second joint, which are rotatably connected together by a central shaft. The first joint is provided with a locking pin groove, and a locking pin slider is provided in the locking pin groove. A locking pin is provided on the locking pin slider, and the locking pin is located in a locking groove. The locking groove is provided on the second joint, and the locking groove has a connected free part and a locking part, with the free part being larger than the locking pin. The locking pin slider is provided with an elastic component, which pushes the locking pin slider to slide in the locking pin 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 are rotatable.

[0019] Furthermore, the locking part is provided in multiple forms.

[0020] Furthermore, the locking pin slider is connected to an outwardly extending rope-like object (steel wire), which pulls the locking pin slider to slide along the locking pin groove, so that the locking pin is located in the free part.

[0021] Furthermore, the second joint is provided with a enclosure, and the first joint is contained within the enclosure.

[0022] To limit the maximum rotation angle of the first and second joints, the enclosure has a blank section, and the first joint has a stop block extending into the blank section, the stop block being smaller than the blank section. Because the stop block is smaller than the blank section, the stop block can rotate a certain distance (angle) under the action of the first joint. After rotating to a certain distance, the enclosure blocks the stop block, thus limiting the rotation angle of the first and second joints.

[0023] In order to limit the rotation angle of the first joint and the second joint, the second joint is provided with a protrusion, and the first joint has a rotation limiting hole for the protrusion to penetrate, the protrusion being smaller than the rotation limiting hole.

[0024] To facilitate unlocking the rope-like object, the pull rod is equipped with an unlocking handle, which is connected to the rope-like object. Specifically, the unlocking handle is a sleeve that is fitted onto the pull rod.

[0025] To limit the movement of the rotating component, a locking mechanism is provided. The rotating component is locked in place by the locking mechanism to prevent the locking component from moving up and down.

[0026] Specifically, the locking mechanism includes a locking groove, in which a locking pin is provided. The locking pin slides back and forth along the locking groove. The locking pin is provided with an elastic component (spring). The elastic component pushes the locking pin out of the rotating part, so that the locking pin is locked in the locking hole.

[0027] Furthermore, the locking pin has an unlocking groove with an unlocking slope, an unlocking pin is provided above the locking pin, the bottom of the unlocking pin is sloped, the unlocking pin is disposed in an unlocking pin groove, and the unlocking pin moves along the unlocking pin groove.

[0028] To provide support for items on the suitcase, a backrest is provided on the top of the suitcase. The backrest includes a back panel, and side panels are provided on both sides of the back panel. The side panels are rotatably connected to the sides of the suitcase. When the backrest is flipped towards the pull rod, the bottom of the back panel supports the top of the suitcase, and the back of the back panel faces the pull rod. When not in use, the back panel is horizontally positioned on the top of the suitcase. When in use, the backrest is flipped towards the pull rod, and the back panel changes from a horizontal to a vertical or near-vertical position on the top of the suitcase, with the bottom of the back panel supporting the top of the suitcase and the back of the back panel facing the pull rod.

[0029] Specifically, the side panels are rotatably connected to both sides of the housing via a backrest pivot.

[0030] In order to store the backrest when not in use and to prevent it from being leaning against the top of the suitcase and affecting its use, the top of the suitcase is provided with a backrest storage slot.

[0031] This utility model features a backrest positioned on the top of the case, which folds backward via a pivot. This structural design offers three key advantages: First, the rear-mounted flip path avoids interference with the opening and closing trajectory of the case lid, ensuring uninterrupted opening and closing. Second, the unfolded backrest forms rear and lateral support surfaces, effectively restraining the position of passengers or belongings and preventing tipping due to inertia. Third, in push mode, children are positioned at the front of the case, close to the operator, facilitating real-time monitoring and interaction, significantly improving safety and convenience.

[0032] This utility model features a suitcase pull rod that can tilt towards the rear of the suitcase, creating an angle between the pull rod and the suitcase body. This lowers the point of force for pushing, preventing the pull rod from being positioned at the top when pulled up. This solves the problem of the suitcase tipping over due to a high point of force during pushing, making the suitcase easier to push. This is especially beneficial when children are sitting on the suitcase, improving safety. Furthermore, the structural design of the backrest and pull rod ensures that the pusher can always observe the passenger or belongings on the backrest while ensuring safe pushing. The small size of the rotating parts allows for easy rotation and locking of the pull rod, facilitating easy reset and expanding the suitcase's functionality. Attached Figure Description

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

[0034] Figure 1 This is a schematic diagram of a double-handled suitcase.

[0035] Figure 2 This is a schematic diagram of the structure of a double-roller suitcase in use.

[0036] Figure 3 This is a schematic diagram of a double tie rod structure.

[0037] Figure 4 This is a schematic diagram of the structure of a single-handle suitcase in use.

[0038] Figure 5 This is a schematic diagram of the first joint structure.

[0039] Figure 6 This is a schematic diagram of the second joint structure.

[0040] Figure 7 This is a schematic diagram of the unlocking mechanism.

[0041] Figure 8 This is a schematic diagram of the locking mechanism.

[0042] Figure 9 This is a schematic diagram of the cross-section of the rotating component.

[0043] Figure 10 This is a schematic diagram of the connection structure between the second joint and the track.

[0044] Figure 11 This is a cross-sectional schematic diagram of the push rod unlocking mechanism.

[0045] Figure 12 This is a schematic diagram of the first joint structure of the push rod unlocking mechanism.

[0046] Figure 13 This is a schematic diagram of the unlocking cover structure for the push-rod unlocking mechanism.

[0047] Figure 14 This is a schematic diagram of the first joint structure of the locking pin rotating component.

[0048] Figure 15 This is a schematic diagram of the second joint structure of the locking pin rotating component.

[0049] Figure 16 This is a schematic diagram of another type of locking pin rotating component.

[0050] Figure 17 This is a schematic diagram of the first joint structure of another type of locking pin rotating component.

[0051] Figure 18 This is a schematic diagram of the locking pin and slider structure of another type of locking pin rotating component.

[0052] Figure 19 This is a schematic diagram of the second joint structure of another type of locking pin rotating component.

[0053] Figure 20 This is a cross-sectional schematic diagram of another type of locking pin rotating component.

[0054] Figure 21 This is a schematic diagram of the track structure. Detailed Implementation

[0055] like Figure 1 , 2 As shown in Figure 4, the suitcase includes a body 11 and a lid 12. Four casters 13 are provided at the bottom of the body 11 and the lid 12. The four casters 13 are distributed at the four corners of the bottom of the suitcase, with two located at the bottom of the lid 12 and two at the bottom of the body 11. Alternatively, the four casters 13 may only be located at the bottom of the body 11.

[0056] The six sides of the box body 11 are the front, rear, left, right, top, and bottom. The lid 12 is located on the front side of the box body 11. A pull rod 2 is provided 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 provided on the top of the box body 11. The backrest includes a back panel 91 and side panels 92 on both sides of the back panel 91. The side panels 92 are rotatably connected to the two sides of the box body 11 (i.e., the right side and the left side of the box body) respectively through the backrest pivot 93. When not in use, the back panel 91 is horizontally located on the top of the box body 11. When in use, the backrest is flipped towards the pull rod 2 (i.e., the rear side of the box body) with the backrest pivot 93 as the axis. The back panel 91 changes from a horizontal state to a vertical or nearly vertical state on the top of the box body 11. At this time, the bottom of the back panel 91 is supported on the top of the box body 11, and the back of the back panel 91 faces the pull rod 2. A backrest storage slot 94 can be provided on the top of the case 11. When the backrest is not in use, the back panel 91 is horizontally positioned within the backrest storage slot 94 on the top of the case 11. In one embodiment, the case lid 12 is located on the front side and the pull rod 2 is located on the rear side. The distance from the front to the rear side of the case 11 is greater than the distance from the left to the right side.

[0057] like Figure 1 , 2 As shown in Figure 3, a handle is provided on the rear side of the box. The bottom of the handle has two pull rods, which are connected to the two sides of the handle (i.e., the right side and the left side of the handle). Two tracks 3 are provided on the rear side of the box. Each pull rod has two connected rods (upper rod 22 and lower rod 21). The end of the upper rod 22 is connected to the handle. The upper rod 22 is set inside the lower rod 21 (such as the common inner tube and outer tube connection method) and slides up and down along the lower rod 21. The lower rod 21 of each pull rod is installed on the track 3 through a rotating component. The lower rod 21 moves up and down along the track 3. When the handle is pulled up, after the rotating component moves to the top of the track 3, the pull rod can rotate a certain angle towards the rear of the box 11 through the rotating component, so that the pull rod tilts towards the rear of the box 11, and a certain angle is formed between the pull rod and the track 3. Of course, a secondary track can be provided on one side of the lower rod 21, the secondary track being the same as track 3 (or other types of tracks), and the upper rod 22 is connected to the secondary track to allow the upper rod 22 to slide up and down along the lower rod 22. As another embodiment, a rotating component can be provided between the upper rod 22 and the lower rod 21, that is, the upper rod 22 is connected to the lower rod 21 via the rotating component, and the lower rod 21 is connected to track 3. In this case, after the pull rod is pulled out (or pulled out halfway), the upper rod 22 can rotate a certain angle towards the rear of the housing 11 via the rotating component, causing the upper rod 22 to tilt towards the rear of the housing 11, forming a certain angle between the upper rod 22 and track 3.

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

[0059] like Figure 3 , 5 As shown in -10, the rotating component 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). The second joint 5 slides up and down along the track 3. Both the first joint 4 and the second joint 5 have open inner cavity structures. The openings of the first joint 4 and the second joint 5 are rotatably connected together via 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. A locking element 7 is provided on the central shaft 52 inside the inner cavities of the first joint 4 and the second joint 5. The outer surface of the locking element 7 is toothed. A spring (or other type of elastic component) is provided between the locking element 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 element 7, and the other end is the second joint 5. The spring is confined between the locking element 7 and the second joint 5. The spring pushes the locking element 7 to be located between the first joint 4 and the second joint 5, so that the toothed shape of the outer surface of the locking element 7 engages with the first internal tooth 41 and the second internal tooth 51. At this time, it is in a locked state, and the first joint 4 and the second joint 5 cannot rotate.

[0060] An unlocking mechanism is provided inside the cavity of the first joint. The unlocking mechanism pushes the locking member 7 to move along the central axis, causing the teeth on the outer surface of the locking member 7 to disengage from the first inner 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. The pull rod and the track 3 can form a certain angle. Of course, the unlocking mechanism can also be set inside the cavity of the second joint 5. In this case, the spring is set between the locking member 7 and the bottom of the 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 confined 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 teeth on the outer surface of the locking member 7 engage with the first inner tooth 41 and the second inner tooth 51.

[0061] The unlocking mechanism pushes the locking member 7, causing the teeth on the outer surface of the locking member 7 to disengage from the first inner tooth 41. This allows rotation between the first joint 4 and the second joint 5. Without the force of the unlocking mechanism, the spring (e.g., restoring its elastic deformation) pushes the locking member 7 to engage with the first inner tooth 41 and the second inner tooth 51. The first joint 4 and the second joint 5 cannot rotate, representing the angle between the locking rod and the track (or upper and lower rods). Rotation of the first joint 4 allows the locking member 7 to engage with the first inner tooth 41 at different positions, indicating different locking angles for the rod. Taking a lever with two locking states as an example, the lever is in a straight state when the locking member 7 engages with the first internal tooth 41 at one position (the lever body and the track 3 remain parallel), and in a tilted state when the locking member 7 engages with the first internal tooth 41 at another position (there is an angle between the lever body and the track 3); or the lever is in a first tilted state when the locking member 7 engages with the first internal tooth 41 at one position (the angle between the lever body and the track 3 is the first included angle), and in a second tilted state when the locking member 7 engages with the first internal tooth 41 at another position (the angle between the lever body and the track 3 is the second included angle), where the first included angle and the second included angle are different. Of course, by engaging the locking member 7 with the first internal tooth 41 at more positions, more diverse lever locking states can be provided.

[0062] like Figure 5 , 7 As shown in Figure 9, the unlocking mechanism can be implemented in the following ways (not limited to the following): The unlocking mechanism includes an unlocking component 6, which is set on the central shaft 52 and located inside the cavity of the first joint 4, on the side away from the locking component 7 (bottom side of the cavity of the first joint 4). The unlocking component 6 is provided with a guide groove 61, and an arc-shaped guide block 42 is provided at the bottom of the cavity of the first joint 4. The guide block 42 has a rising surface (along the axial direction of the central shaft 52), and the shape of the guide groove 61 corresponds to the shape of the guide block 42. An outwardly extending rope is connected to the unlocking component 6. When the rope is pulled, the unlocking component 6 rotates along the central shaft 52. When rotating, since the guide block 42 has a rising surface, the rising surface cooperates with the guide groove 61, so that when the unlocking component 6 rotates along the central shaft 52, it moves towards the locking component 7, thereby pushing the locking component 7 away from the first joint 4. The first joint 4 and the second joint 5 can rotate together. A rope-like object, which is a steel wire (or other type of rope), is connected to the rope-like object connection hole 62 of the unlocking component 6. One end of the steel wire is connected to the rope-like object connection hole 62 of the unlocking component 6, and the other end extends out of the first joint 4. The steel wire pulls the unlocking component 6 to rotate along the central axis 52. The unlocking component 6 moves along the rising surface of the guide block 42 towards the second joint 5. The unlocking component 6 pushes the locking component 7, causing the outer surface teeth of the locking component 7 to disengage from the first inner teeth 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. The pull rod and the track 3 can form a certain angle.

[0063] After the unlocking component 6 is no longer under the tension of the steel wire, the spring returns to its original state, and the locking component 7 resets along the central axis 52, causing the teeth on the outer surface of the locking component 7 to engage with the first inner tooth 41 and the second inner tooth 51, thus resetting the locking state. At the same time, the locking component 7 also pushes the unlocking component 6 to move along the central axis 52. Specifically, the unlocking component 6 rotates in the opposite direction along the rising surface of the guide block 42, realizing the overall rotation along the central axis 52, that is, moving to one side.

[0064] like Figure 5 , 6 As 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 protrusion 53 extending into the toothless section, the protrusion 53 being smaller than the toothless section. Because the protrusion 53 is smaller than the toothless section, the toothless section can rotate a certain stroke (angle) under the action of the first joint 4. After rotating to a certain stroke, the protrusion 53 is blocked by the side wall of the toothless section, thus limiting the rotation angle of the first joint 4 and the second joint 5.

[0065] like Figure 2 , 4 As shown, to facilitate unlocking with the rope-like object, a steel wire is installed inside the lower rod 21. An unlocking handle 23 is connected to the end of the steel wire. The unlocking handle 23 is a sleeve that fits onto the upper rod 22. The sleeve slides on the upper rod 22, pushing it upwards along the upper rod 22. The sleeve pulls the steel wire, thus unlocking the locking element. Pushing the sleeve back to its original position releases the tension of the steel wire, and the spring returns to its original state, thus resetting the locking state. Alternatively, the sleeve can also be fitted onto the lower rod 21 and slide on it to pull the steel wire to unlock. Of course, the unlocking handle can also be any other component capable of displacement, able to drive the steel wire to pull the unlocking element 6 to rotate along the central axis 52.

[0066] In order to limit the rotating component to the top of the track 3, the rotating component is provided with a locking mechanism. After the pull rod pulls the rotating component to the top of the track 3, the rotating component is locked on the track by the locking mechanism.

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

[0068] To unlock the locking mechanism, the locking pin 81 has an unlocking groove 82, which has an unlocking ramp 83. An unlocking pin 84 is positioned above the unlocking ramp 83, with a ramped bottom. The unlocking pin 84 is located within an unlocking pin groove and moves along the groove. Pressing or striking the unlocking pin 84 causes it to insert into the unlocking groove 82. The ramp at the bottom of the unlocking pin 84 pushes the unlocking ramp 83, causing the locking pin 81 to slide along the locking groove and disengage from the locking hole, thus unlocking the mechanism. At this point, the spring is compressed. After the pressure on the unlocking pin 84 disappears, the spring returns to its original position, pushing the locking pin 81 back to its original position. The ramp 83 then pushes the unlocking pin 84 upwards, and the spring pushes the head of the locking pin 81 out of the second joint 5, locking it within the locking hole.

[0069] A locking mechanism is provided on the rotating component. Taking the locking of the lower rod 21 as an example, the purpose of the locking mechanism is to fix the position of the lower rod 21 after it is extended. By providing a locking mechanism on the rotating component, the entire rotating component can be fixed to the track 3, thereby fixing the position of the lower rod 21. As a way to implement the locking mechanism, the locking mechanism can be a common locking component in the prior art, such as a locking mechanism with a latch. A latch hole is provided on the top of the track 3. After the latch is inserted into the latch hole, the position between the locking mechanism and the track 3 is fixed, and the pull rod is limited to the top of the track 3. At this time, it is in the locked state, and the rotating component cannot move on the track 3. When the latch is disengaged from the latch hole, it is in the unlocked state, and the rotating component can move on the track 3.

[0070] As another unlocking mechanism, such as Figure 11-13 As shown, the unlocking mechanism includes an unlocking cover 553 outside the first joint 4. The unlocking cover 553 has four (or one or more) push rods 552, which are arranged sequentially around the central axis 52. The first joint 4 has push rod through holes 551 corresponding to the push rods 552. The unlocking cover 553 is exposed on the first joint 4, and the push rods 552 on the unlocking cover 553 extend into the inner cavity of the first joint 4 through the push rod through holes 551. Pressing the unlocking cover 553 pushes the locking member 7 to move along the central axis 52, causing the outer surface teeth of the locking member 7 to disengage from the first inner teeth 41. At this time, the unlocking state is achieved. The spring is compressed, and the first joint 4 and the second joint 5 can rotate, and the pull rod 2 and the track 3 can form a certain angle.

[0071] After the unlock cover 553 is depressurized, the spring returns to its original state, the locking member 7 resets along the central axis 52, and the locking member 7 pushes the unlock cover 553 to move and reset towards the first joint 4, so that the teeth on the outer surface of the locking member 7 engage with the first inner tooth 41 and the second inner tooth 51, and reset the locking state.

[0072] To limit the push rod and prevent it from dislodging from the inner cavity of the first joint, the push rod 552 has a push rod protrusion 554 at its head end. The push rod protrusion 554 is located within the inner cavity of the first joint 4 and abuts against the push rod through hole 551 to prevent the push rod 552 from dislodging from the inner cavity of the first joint 4. Specifically, the push rod protrusions 554 on all four push rods 552 are protrusions on one side of the push rod 552. When the unlocking cover 553 is installed on the first joint 4, each push rod 552 is pressed, causing it to bend away from the protrusion. This allows the protrusion at the head end of the push rod 552 to pass through the push rod through hole 551. After the protrusion passes through the through hole 551, the push rod 552 returns to its original shape, with the protrusion abutting against the push rod through hole 551 to prevent the push rod 552 from dislodging from the inner cavity of the first joint 4. Of course, the push rod protrusion 554 can also be other common limiting structures.

[0073] It should be noted that, to facilitate pressing the unlocking cover, taking a handle with two levers at the bottom as an example, each lever is located on the outer side of the track (closer to the side wall of the housing 11), with the two tracks between the two levers. The unlocking cover faces the side wall of the housing 11, and the side wall of the housing 11 is provided with an unlocking cover pressing hole. The unlocking cover 553 is exposed through the unlocking cover pressing hole so that pressing the unlocking cover can perform the unlocking operation. When the handle has only one lever at the bottom, the track connected to the lever has an extension protruding from the housing surface so that the unlocking cover can be exposed or partially exposed, facilitating the pressing of the unlocking cover. Of course, a pressing relief groove can also be provided on one side of the track 3 on the housing to allow the unlocking cover to be exposed or partially exposed, and the unlocking cover can be pressed through the pressing relief groove to perform the unlocking operation.

[0074] As another way to realize rotating parts, such as Figure 14 , 15As shown, the rotating component 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 via a guide block 54 (similar to a slider). The second joint 5 slides along the track 3. The first joint 4 and the second joint 5 are rotatably connected together via a central shaft 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 groove 561. The locking pin groove 561 is arranged in the vertical direction, and a locking pin slider 562 is arranged in the locking pin groove 561. The locking pin slider 562 slides up and down along the locking pin groove 561. The locking pin slider 562 has a protruding locking pin 563, which is located in the locking groove 564. The locking groove 564 has a communicating free part and two (or more) locking parts 565. The free part is larger than the locking pin 563, and the locking pin 563 can move freely in the free part, that is, the locking pin 563 can rotate in its free part. A spring (or other type of elastic component) is provided above the locking pin slider 562. The spring is located within the locking pin groove 561 and is confined between the locking pin slider 562 and the locking pin groove 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 groove 561. The spring pushes the locking pin slider 562 to slide downward along the locking pin groove 561. The locking pin slider 562 drives the locking pin 563 to move, so that the locking pin 563 is located in the locking part 565 or in the free part. When the locking pin 563 is located in the locking part 565, it is in the locked state, and the first joint 4 and the second joint 5 cannot rotate. When the locking pin 563 is located in the free part, it can rotate in the free part, which is the unlocked state, and the first joint 4 and the second joint 5 can rotate.

[0075] A rope-like object, which is a steel wire (or other type of rope), is connected to the locking pin slider 562. 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 upward along the locking pin groove 561. The locking pin 563 disengages from the locking part 565 and enters the free part, which is the unlocked state. At this time, the spring is compressed, and the first joint 4 and the second joint 5 can rotate. The pull rod and the track 3 can form a certain angle.

[0076] After the locking pin slider 562 is free of the tension of the steel wire, the spring returns to its original state, pushing the locking pin slider 562 downward along the locking pin groove 561 to reset, so that the locking pin 563 is located in the locking part 565, which is the reset locking state.

[0077] The steel wire pull-lock pin 563 is located within the free part, allowing rotation between the first joint 4 and the second joint 5. A spring pushes the lock pin within the locking part, preventing rotation between the first joint 4 and the second joint 5, thus locking the angle between the pull rod and the track (or upper and lower rods). Two locking parts 565 are provided, indicating two locking states for the pull rod: one is a straightened state (the rod and track 3 remain parallel), and the other is an inclined state (the rod and track 3 form an angle); or one is a first inclined state (the angle between the rod and track 3 is a first included angle), and the other is a second inclined state (the angle between the rod and track 3 is a second included angle), where the first and second included angles are different. Of course, more than three locking parts can be provided to offer more diverse pull rod locking states.

[0078] like Figure 14 , 15 As 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 rotation limiting hole, and the second joint 5 has a protrusion 53 extending into the rotation limiting hole, the protrusion 53 being smaller than the rotation limiting hole. Because the protrusion 53 is smaller than the rotation limiting hole, the rotation limiting hole can rotate a certain stroke (angle) under the action of the first joint 4. After rotating to a certain stroke, the side wall of the rotation limiting hole blocks the protrusion 53, thus limiting the rotation angle of the first joint 4 and the second joint 5.

[0079] As another way to realize rotating parts, such as Figure 16-20 As shown, the rotating component includes a first joint 4 and a second joint 5. The lower rod 21 is connected to the first joint 4, and the second joint 5 is connected to the track 3 via a guide block 54 (similar to a slider). The second joint 5 slides along the track 3. The second joint 5 has a enclosure, and the end of the enclosure has a wall panel. The wall panel, enclosure, and second joint 5 are an integral structure. The first joint 4 is located inside the enclosure and between the second joint 5 and the wall panel. The first joint 4 is rotatably connected to the second joint 5 via a central shaft. The enclosure 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. Because 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, the enclosure blocks the stop block, thus limiting the rotation angle of the first joint 4 and the second joint 5.

[0080] The first joint 4 has a locking pin sliding hole 571, which is set in the vertical direction. A locking pin slider 572 is set in the locking pin sliding hole 571. The locking pin slider 572 slides up and down along the locking pin sliding hole 571. The locking pin slider 572 has a locking pin slider connecting hole. A locking pin 573 is set in the locking pin slider connecting hole. Both ends of the locking pin 573 protrude from the locking pin slider connecting hole. The two sides of the first joint 4 are respectively provided with waist-shaped holes 574. The locking pin 573 protrudes into 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 moves up and down in the waist-shaped holes 574. Locking grooves 581 are provided on both sides of the first joint 4, the second joint 5, and the wall panel. Each locking groove 581 has a connected free part and two (or more) locking parts 582. The free part is larger than the locking pin 573, that is, the locking pin 573 can rotate in its free part. The locking grooves 581 on both sides are symmetrically arranged. A spring (or other type of elastic component) is provided above the locking pin slider 572. The spring is located inside the locking pin slide hole 571 and is confined between the locking pin slider 572 and the locking pin slide hole 571. That is, one end of the spring is the locking pin slider 572 and the other end is the locking pin slide hole 571. The spring pushes the locking pin slider 572 to slide downward along the locking pin slide hole 571. 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 in the free part. When the locking pin 573 is located in the locking part 582, it is in the locked state, 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 in the free part, which is the unlocked state, and the first joint 4 and the second joint 5 can rotate.

[0081] A rope-like object, which is a steel wire (or other type of rope), is connected to the locking pin slider 572. 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 upward along the locking pin slide hole 571. The locking pin slide hole 571 drives the locking pin 573. 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. The pull rod and the track 3 can form a certain angle.

[0082] After the locking pin slider 572 is free of the tension of the steel wire, the spring returns to its original state, pushing the locking pin slider 572 downward along the locking pin sliding hole 571 to reset, so that the locking pin 573 is located in the locking part 582, which is the reset locking state.

[0083] like Figure 17 , 19As shown in Figure 20, 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 protrusion 53 extending into the rotation limiting hole, the protrusion 53 being smaller than the rotation limiting hole. Because the protrusion 53 is smaller than the rotation limiting hole, the rotation limiting hole can rotate a certain stroke (angle) under the action of the first joint 4. After rotating to a certain stroke, the side wall of the rotation limiting hole blocks the protrusion 53, thus limiting the rotation angle of the first joint 4 and the second joint 5.

[0084] As another implementation of the rotating component, the rotating component can be a common rotating part in the prior art. For example, the rotating component is divided into two parts (i.e., a first rotating seat and a second rotating seat), and the two parts are rotatably connected relative to each other (e.g., 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 up to the top of the track, and the pull rod is moved towards the rear of the housing, the lower rod body rotates through the rotating component, and at this time, both parts of the rotating component rotate. Of course, multiple pin holes can be provided on both parts of the rotating component. Inserting pins into different pin holes of the two parts can fix the two parts (i.e., lock the rotating component to stop it from rotating). Of course, the rotating component 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 subjected to force in one direction).

[0085] As another implementation, taking the example of having only one pull rod at the bottom of the handle, a track is set in the middle of the rear side of the case, and a pull rod is set at the bottom of the handle. The pull rod has only one rod body, which is connected to the track through any of the aforementioned rotating parts. The rod body moves up and down along the track, and the rod body can be rotated a certain angle towards the rear of the case through the rotating parts, causing the rod body to tilt towards the rear of the case, forming a certain angle between the rod body and the track. Of course, two pull rods are also set at the bottom of the handle, with two tracks on the left and right sides of the rear of the case, and two pull rods at the bottom of the handle. The two pull rods are respectively connected to the two sides of the handle, and each pull rod has only one rod body. Each pull rod body is connected to the track through a rotating part. The rod body moves up and down along the track. When the handle is pulled up, after the rotating part moves to the top of the track, the rod body can be rotated a certain angle towards the rear of the case through the rotating part, causing the rod body to tilt towards the rear of the case, forming a certain angle between the rod body and the track.

[0086] Of course, the tie rod may also have three or more connected rods, and any of the above-mentioned rotating parts may be set between any two adjacent rods so that a certain angle can be formed between the adjacent rods. Of course, multiple rotating parts can be installed on the lever. Taking three connected levers as an example, the lower lever is connected to the track via a rotating part, and the lower lever moves up and down along the track. The lower lever also rotates to one side of the track via the rotating part, creating an angle between the lower lever and the track. The middle lever is connected to the lower lever via a rotating part, and the middle lever moves up and down along the lower lever. The middle lever also rotates to one side of the lower lever via the rotating part, creating an angle between the middle lever and the lower lever. The upper lever moves up and down along the middle lever. Alternatively, the lower lever is connected to the track, and the lower lever moves up and down along the track. The middle lever is connected to the lower lever via a rotating part, and the middle lever moves up and down along the lower lever. The middle lever rotates to one side of the lower lever via the rotating part, creating an angle between the middle lever and the lower lever. The upper lever is connected to the middle lever via a rotating part, and the upper lever moves up and down along the middle lever. The upper lever rotates to one side of the middle lever via the rotating part, creating an angle between the upper lever and the middle lever.

[0087] As one way to implement a track, such as Figure 21 As shown, the track can be installed inside a square tube, located on the inner wall of one side of the tube. The pull rod (or upper rod) is connected to the track via a rotating component. When the pull rod moves up and down along the track, the rotating component moves up and down inside the square tube. When the rotating component reaches the top of the track, it fully or partially extends out of the square tube, allowing the pull rod to rotate on the track via the rotating component, thus tilting the pull rod towards the rear of the housing. Of course, this structure can also be used for the secondary track to achieve both up and down movement of the rotating component along the secondary track and rotation of the rotating component on the secondary track.

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

Claims

1. A suitcase, comprising a suitcase body, wherein a pull rod is provided on the rear side of the suitcase body, characterized in that: The pull rod consists of one rod or two or more connected rods. A rotating component is provided at the bottom of the pull rod or between any two adjacent rods. After the pull rod is pulled out, the rod rotates at a certain angle through the rotating component and tilts towards the rear of the box.

2. The suitcase according to claim 1, characterized in that: The pull rod consists of a rod body, which is connected to the track via a rotating component, and the rod body moves up and down along the track.

3. The suitcase according to claim 1, characterized in that: The pull rod consists of two connected rods, with the upper rod moving up and down on the lower rod. The lower rod is connected to a track via a rotating component and moves up and down along the track.

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

5. The suitcase according to claim 3, characterized in that: A secondary track is provided on the lower rod, and the upper rod moves up and down on the lower rod along the secondary track.

6. The suitcase according to claim 1, characterized in that: The pull rod consists of two connected rods. The lower rod is connected to a track and moves up and down along the track. A secondary track is provided on the lower rod. The upper rod is connected to the secondary track of the lower rod through a rotating component. The upper rod moves on the secondary track through the rotating component.

7. The suitcase according to any one of claims 1-6, characterized in that: The rotating component includes a first joint and a second joint, both of which have open inner cavities. The openings of the first and second joints are rotatably connected by a central shaft. 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. A locking component is provided on the central shaft within the inner cavities of the first and second joints. The outer surface of the locking component is toothed. An elastic component is provided between the locking component and the second joint. The elastic component pushes the locking component between the first and second joints, causing the teeth on the outer surface of the locking component to mesh with the first and second internal teeth. An unlocking mechanism is provided within the inner cavity of the first joint. The unlocking mechanism pushes the locking component, causing the teeth on the outer surface of the locking component to disengage from the first internal tooth.

8. The suitcase according to claim 7, characterized in that: The elastic component is a spring, which is sleeved on the central shaft.

9. The suitcase according to claim 7, characterized in that: The unlocking mechanism includes an unlocking component, which is mounted on a central axis. On the side away from the locking component, the unlocking component has a guide groove. An arc-shaped guide block is mounted on the inner cavity of the first joint. The guide block has a rising surface, and the shapes of the guide groove and the guide block correspond. The unlocking component is connected to an outwardly extending rope, which pulls the unlocking component to rotate along the central axis. The unlocking component moves along the rising surface of the guide block towards the locking component, causing the outer surface teeth of the locking component to disengage from the first inner teeth.

10. The suitcase according to claim 7, characterized in that: The unlocking mechanism includes one or more push rods. The rotating component is provided with push rod through holes corresponding to the push rods. The push rods push the locking component through the push rod through holes, causing the outer surface teeth of the locking component to disengage from the first inner teeth.

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

12. The suitcase according to claim 10, characterized in that: The push rod is provided with a push rod protrusion, which is located inside the inner cavity.

13. The suitcase according to claim 7, characterized in that: The second joint cavity has a protrusion, and the first joint cavity has a toothless section into which the protrusion extends, the protrusion being smaller than the toothless section.

14. The suitcase according to any one of claims 1-6, characterized in that: The rotating component includes a first joint and a second joint, which are rotatably connected together via a central shaft. The first joint is provided with a locking pin groove, and a locking pin slider is provided within the locking pin groove. A locking pin is provided on the locking pin slider, and the locking pin is located within a locking groove. The locking groove is located on the second joint, and the locking groove has a connected free portion and a locking portion, with the free portion being larger than the locking pin. The locking pin slider is provided with an elastic component, which pushes the locking pin slider to slide within the locking pin groove, causing the locking pin to be located within the locking portion. When the locking pin is located within the locking portion, the first joint and the second joint are locked. When the locking pin is located within the free portion, the first joint and the second joint are rotatable.

15. The suitcase according to claim 14, characterized in that: The locking part is provided in multiple ways.

16. The suitcase according to claim 14, characterized in that: The locking pin slider is connected to an outwardly extending rope, which pulls the locking pin slider to slide along the locking pin groove, so that the locking pin is located in the free part.

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

18. The suitcase according to claim 17, characterized in that: The fence has a blank section, and the first joint has a stop block that extends into the blank section, the stop block being smaller than the blank section.

19. The suitcase according to claim 14, characterized in that: The second joint is provided with a protrusion, and the first joint has a limiting hole for the protrusion to penetrate, wherein the protrusion is smaller than the limiting hole.

20. The suitcase according to claim 9 or 16, characterized in that: The lever is equipped with an unlocking handle, which is connected to a rope.

21. The suitcase according to claim 20, characterized in that: The unlocking handle is a sleeve, which is fitted onto the pull rod.

22. The suitcase according to any one of claims 1-6, characterized in that: The rotating component is equipped with a locking mechanism.

23. The suitcase according to claim 22, characterized in that: The locking mechanism includes a locking groove, in which a locking pin is provided. The locking pin slides back and forth along the locking groove. The locking pin is provided with an elastic component, which pushes the locking pin out of the rotating component, thereby locking the locking pin in the locking hole.

24. The suitcase according to claim 23, characterized in that: The locking pin has an unlocking groove with an unlocking slope. An unlocking pin is provided above the locking pin. The bottom of the unlocking pin is sloped. The unlocking pin is located in an unlocking pin groove and moves along the unlocking pin groove.

25. The suitcase according to claim 1, characterized in that: The top of the box is provided with a backrest, which includes a back panel and side panels on both sides of the back panel. The side panels are rotatably connected to the two sides of the box. After the backrest is flipped toward the pull rod, the bottom of the back panel is supported on the top of the box, and the back of the back panel faces the pull rod.

26. The suitcase according to claim 25, characterized in that: The side panels are rotatably connected to both sides of the box body via a backrest pivot.

27. The suitcase according to claim 25, characterized in that: The top of the box is equipped with a backrest storage slot.

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