Ultra-light draw-bar box

Abstract

The utility model discloses an ultralight draw-bar box, which belongs to the technical field of draw-bar boxes and comprises a first box body and a second box body, connecting components are arranged on the sides, close to each other, of the first box body and the second box body, and a folding box body is arranged between the two connecting components. The folding box body is installed between the first box body and the second box body through the two connecting assemblies, the connecting assemblies are installed on the first box body and the second box body, the folding box body made of oxford cloth is connected through the two connecting assemblies so that the folding box body can be folded and contracted, and the pull rope sequentially penetrates through the connecting blocks fixed to the two fixing frames. When the draw-bar box is used, the two fixing frames can be tensioned by tightening the pull rope, and the folding box body can be folded and contracted, so that the overall volume of the draw-bar box is reduced, and the draw-bar box can be suitable for different scenes through a variable-volume structure and is more convenient to carry or consignment.

Description

Technical Field

[0001] This utility model relates to the field of trolley case technology, and more specifically, to an ultra-lightweight trolley case. Background Technology

[0002] Lightweight rolling suitcases are luggage made of lightweight materials to minimize their weight while maintaining durability and practicality. Designed to make carrying luggage easier for travelers, these suitcases are especially suitable for frequent travelers such as business travelers or backpackers. Lightweight rolling suitcases reduce the burden of travel, enhance the travel experience, and are an ideal choice for modern travelers.

[0003] Chinese Patent Announcement No. CN222303274U discloses a lightweight trolley case. This design features a trolley case body with a telescopic pull rod and a handle at the top. The case body has a slot extending downwards from its upper surface, away from the rear end of the case body. A removable guide plate is inserted into the slot, with a tray attached to the top of the guide plate and pressed against the top of the case body. The tray has a first process hole for the telescopic pull rod and a second process hole for the handle. The front end of the slot has an opening communicating with the outside. This design offers versatility, ease of use, and comprehensive functionality. The retractable tray, because it does not need to be embedded in the slot on the case body, allows for a larger volume, enabling the placement of more items on a table. It is flexible, convenient, and highly practical.

[0004] The above-mentioned solutions and the current rolling suitcases on the market are mainly composed of two suitcases combined together to form a complete suitcase. However, since the volume of the suitcase is fixed, even if there are few items to be placed and the inside of the suitcase is not fully filled, the volume of the suitcase cannot be reduced. This results in inconvenience when checking in or carrying the suitcase due to its large size.

[0005] Therefore, an ultra-lightweight suitcase is proposed to address the above problems. Utility Model Content

[0006] 1. Technical problems to be solved

[0007] This invention provides an ultra-lightweight trolley case that can improve the problems existing in related technologies: when there are few items to be placed and the inside of the case is not fully filled, the volume of the case cannot be reduced, which leads to inconvenience in use when checking in or carrying it due to its excessive size.

[0008] Technical solution

[0009] To solve the above problems, the present invention adopts the following technical solution.

[0010] This application provides an ultra-lightweight trolley case, including a case body one and a case body two. Each of the case body one and case body two has a connecting component located close to each other. A folding case body is positioned between the two connecting components and is installed between the case body one and case body two via the two connecting components. The folding case body reduces the volume of the trolley case by folding it so that the case body one and case body two are brought closer together. A pull rope is wound around the outer ends of the two connecting components, and tightening the pull rope keeps the folding case body in a folded state. A rope-retracting component is located at the top of the case body one, and the pull rope is kept taut by the rope-retracting component.

[0011] The technical solutions described in this application embodiment have at least the following technical effects:

[0012] Connecting components are installed on the first and second cases, which connect the folding cases made of Oxford cloth, allowing them to be folded and retracted. Pull ropes pass through the connecting blocks fixed on the two fixed frames in sequence. When there are few items in the case, the two fixed frames can be tightened by pulling the pull ropes, at which point the folding cases will also be folded and retracted, thereby reducing the overall volume of the suitcase. Through the variable volume structure, it can be used in different scenarios, making it easier to carry or check in.

[0013] In some embodiments, a lid is rotatably connected to the outer end of the first box body, a zipper is installed between the outer edge of the lid and the first box body, two casters are installed at the bottom of both the first box body and the second box body, and a retractable pull rod is installed at the outer end of the second box body.

[0014] In some embodiments, the connecting assembly includes a fixing frame, and the first box and the second box are fixedly connected to the fixing frame on one side close to each other. The two sides of the folding box are respectively connected to the two fixing frames, and the folding box is made of Oxford cloth.

[0015] In some embodiments, a plurality of connecting blocks are fixedly connected to the outer end of the fixed frame. Each of the plurality of connecting blocks has a rope hole at its outer end that matches the pull rope. The pull rope passes through the rope holes of the plurality of connecting blocks on the two fixed frames in sequence. By tightening the two ends of the pull rope, the two fixed frames tend to move closer to each other.

[0016] In some embodiments, the rope winding assembly includes a mounting frame and a rotating shaft. The mounting frame is fixedly mounted on the top of the housing. The rotating shaft passes through the mounting frame. A winding disc is fixedly mounted on the outer end of the rotating shaft. A fixing nail is fixedly mounted on the inner side of the winding disc. The pull rope is sleeved on the outer end of the fixing nail. The winding disc is rotated to cause the pull rope to be wound around the inner side of the winding disc.

[0017] In some embodiments, the rope winding assembly further includes a second rotating shaft that passes through the mounting frame. A drive gear is fixedly mounted on the outer end of the second rotating shaft, and a driven gear is fixedly mounted on the outer side of the winding disc. The drive gear and the driven gear are meshed together. A limit ring is fixedly mounted on the outer end of the first rotating shaft, and a spring is sleeved on the outer end of the first rotating shaft. The spring is located between the limit ring and the side wall of the mounting frame, and a knob is fixedly mounted on one end of the first rotating shaft.

[0018] In some embodiments, the rope winding assembly further includes a housing, which is fixedly installed on the outer end of the mounting bracket. A second spring is fixedly installed on the inner wall of the housing, and a pawl is rotatably connected to the inner wall of the housing. A ratchet is fixedly installed on the outer end of the second rotating shaft. The pawl is forced against the ratchet by the force of the second spring to make it rotate in one direction. A second knob is fixedly installed on one end of the second rotating shaft. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the connection component structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the rope winding component structure of this utility model;

[0022] Figure 4 This is a partial cross-sectional view of the rope winding assembly of this utility model;

[0023] Figure 5 This is a partially enlarged structural diagram of the rope winding assembly of this utility model.

[0024] Explanation of the labels in the diagram:

[0025] 1. Box 1;

[0026] 2. Box Two;

[0027] 3. Foldable case;

[0028] 4. Connecting components; 41. Fixing frame; 42. Connecting block; 43. Rope threading hole;

[0029] 5. Pull the rope;

[0030] 6. Box lid;

[0031] 7. Zipper;

[0032] 8. Rope winding assembly; 81. Mounting bracket; 82. Shaft 1; 83. Windlass reel; 84. Fixing pin; 85. Limiting ring; 86. Spring 1; 87. Knob 1; 88. Shaft 2; 89. Knob 2; 810. Drive gear; 811. Driven gear; 812. Housing; 813. Ratchet; 814. Pawl; 815. Spring 2;

[0033] 9. Casters;

[0034] 10. Pull rod. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0036] Please see Figures 1-5 An ultra-lightweight trolley case includes a case body 1 and a case body 2. Each of the case bodies 1 and 2 has a connecting component 4 on one side close to each other. A folding case body 3 is arranged between the two connecting components 4. The folding case body 3 is installed between the case bodies 1 and 2 via the two connecting components 4. The folding case body 3 reduces the volume of the trolley case by folding the case bodies 1 and 2 closer together. Pull ropes 5 are wrapped around the outer ends of the two connecting components 4. The folding case body 3 is kept folded by tightening the pull ropes 5. A rope winding component 8 is provided on the top of the case body 1. The pull ropes 5 are kept taut by the rope winding component 8.

[0037] A lid 6 is rotatably connected to the outer end of the box body 1. A zipper 7 is installed between the outer edge of the lid 6 and the box body 1. Two casters 9 are installed at the bottom of both the box body 1 and the box body 2. A retractable pull rod 10 is installed at the outer end of the box body 2.

[0038] Compared to traditional suitcases, the main feature of this design is its variable volume, allowing it to be selected according to different needs. The depth of both compartment 1 and compartment 2 is shallower than traditional suitcases, resulting in a smaller volume when fully folded (combined compartment 3). Both compartments 1 and 2 are made of rigid materials, such as aluminum alloy or plastic. Two omnidirectional wheels 9 are installed at the bottom of both compartments 1 and 2, allowing users to push them. An opening is located on the front of compartment 1, with a rotating lid 6. When the lid 6 is open, items can be placed or retrieved inside. A zipper 7 is sewn between the lid 6 and compartment 1. A pull rod 10 is installed on the top of compartment 2, allowing it to be pushed or pulled.

[0039] Connecting components 4 are installed on case 1 and case 2, connecting a folding case 3 made of Oxford cloth, allowing it to be folded and retracted. Pull ropes 5 pass through connecting blocks 42 fixed to two fixed frames 41. When the contents of the case are few, the pull ropes 5 can be tightened to pull the two fixed frames 41 together, causing the folding case 3 to fold and retract, thus reducing the overall volume of the suitcase. This variable volume structure makes it suitable for different scenarios, making it easier to carry or check in. A rope-retracting component 8 is installed on case 1 to restrain the tightened pull rope 5, preventing it from coming undone.

[0040] Please see Figure 1 and Figure 2 The connecting component 4 includes a fixed frame 41. Box 1 and Box 2 are fixedly connected to the fixed frame 41 on one side of each other. The two sides of the folding box 3 are respectively connected to the two fixed frames 41. The folding box 3 is made of Oxford cloth.

[0041] Multiple connecting blocks 42 are fixedly connected to the outer end of the fixed frame 41. Each connecting block 42 has a rope hole 43 that matches the pull rope 5 at its outer end. The pull rope 5 passes through the rope hole 43 of the multiple connecting blocks 42 on the two fixed frames 41 in sequence. By tightening the two ends of the pull rope 5, the two fixed frames 41 tend to move closer to each other.

[0042] In this design, the two connecting components 4 are respectively installed on the first box 1 and the second box 2. The fixing frame 41 can be fixed to the outer edge of the first box 1 or the second box 2 by rivets or screws, so that it can fit perfectly within the frame. Multiple connecting blocks 42 are fixed on the outer edge of the fixing frame 41. Each connecting block 42 has a rope hole 43 in its center. The connecting blocks 42 on the two connecting components 4 are one-to-one, so that the pull rope 5 can be threaded through the rope holes 43 on the multiple connecting blocks 42 in sequence, like threading a shoelace. Between the two fixing frames 41, the folding box 3 is fixed. The folding box 3 can be made of soft, foldable materials such as Oxford cloth, leather, or polyester fiber. The resulting structure allows the two connecting components 4 to be brought closer together by tightening the ends of the pull rope 5, thereby compressing the folding case 3 installed in the middle. This allows the case to fold and reduce the distance between case 1 and case 2, thus changing the case volume. This variable volume function allows it to adapt to the volume of items placed inside, making it more convenient to carry. Compared to traditional suitcases, which are prone to damage if fragile glass items are not fully packed, this design reduces the volume and prevents movement when tightly packed together, thus improving the protection of the contents. Furthermore, by replacing most of the middle section with the folding case 3, it achieves a lighter weight, contributing to weight reduction.

[0043] Please see Figures 3-5 The rope winding assembly 8 includes a mounting frame 81 and a rotating shaft 82. The mounting frame 81 is fixedly installed on the top of the housing 1. The rotating shaft 82 passes through the mounting frame 81. A winding disc 83 is fixedly installed on the outer end of the rotating shaft 82. A fixing nail 84 is fixedly installed on the inner side of the winding disc 83. The pull rope 5 is sleeved on the outer end of the fixing nail 84. The winding disc 83 rotates to cause the pull rope 5 to be wound around the inner side of the winding disc 83.

[0044] The rope winding assembly 8 also includes a second rotating shaft 88, which passes through the mounting frame 81. A drive gear 810 is fixedly installed at the outer end of the second rotating shaft 88, and a driven gear 811 is fixedly installed on the outer side of the winding reel 83. The drive gear 810 and the driven gear 811 are meshed together. A limit ring 85 is fixedly installed at the outer end of the first rotating shaft 82, and a spring 86 is sleeved on the outer end of the first rotating shaft 82. The spring 86 is located between the limit ring 85 and the side wall of the mounting frame 81. A knob 87 is fixedly installed at one end of the first rotating shaft 82.

[0045] The rope winding assembly 8 also includes a housing 812, which is fixedly installed on the outer end of the mounting bracket 81. A spring 815 is fixedly installed on the inner wall of the housing 812, and a pawl 814 is rotatably connected to the inner wall of the housing 812. A ratchet 813 is fixedly installed on the outer end of the rotating shaft 88. The pawl 814 is pushed against the ratchet 813 by the force of the spring 815, causing it to rotate in one direction. A knob 89 is fixedly installed on one end of the rotating shaft 88.

[0046] The rope winding assembly 8 in this solution is mainly used to wind the pull rope 5, so that it will not loosen when tightening the connecting assembly 4. The mounting bracket 81 is fixed to the top of the housing 1. The mounting bracket 81 is penetrated by the first rotating shaft 82 and the second rotating shaft 88. The outer end of the first rotating shaft 82 is fixed to the winding disc 83. The inner roller of the winding disc 83 is fixed with the fixing nail 84. After the two ends of the pull rope 5 butterfly valve are connected together, it can be put on the fixing nail 84, and then the winding disc 83 can wind it. The outer end of the first rotating shaft 82 is also fixed with the limiting ring 85. The first spring 86 is sleeved on the first rotating shaft 82. The first spring 86 is located between the limiting ring 85 and the side wall of the mounting bracket 81, clamping the first spring 86 in the middle. At the same time, one end of the first rotating shaft 82 is fixed with the knob 87. The knob 87 is mainly used to pull the first rotating shaft 82, so that the winding disc 83 can move to disengage from the limiting ring. The drive gear 810 and ratchet 813 are fixed on the second rotating shaft 88. The housing 812 is fixed to the outer end of the mounting bracket 81. The second rotating shaft 88 passes through both the housing 812 and the mounting bracket 81. A knob 89 is fixed to one end. The ratchet 813 is located inside the housing 812. A spring 815 is fixed inside the housing 812, and a pawl 814 is rotatably mounted thereon. The force of the spring 815 can push the pawl 814 against the ratchet 813 and restrict it to rotate only in one direction. The ratchet 813 is meshed with the driven gear 811, which is fixed to the outer end of the winch 83.

[0047] When it is necessary to tighten the connecting assembly 4 by winding the pull rope 5, the knob 89 can be turned to make the shaft 88 drive the ratchet 813 and the drive gear 810 to rotate. At this time, through the meshing connection, the drive gear 810 drives the driven gear 811 to rotate, and the driven gear 811 drives the winding disc 83 to rotate, thereby winding the pull rope 5 so that the pull rope 5 is wound on the inner cylinder of the winding disc 83. After the winding stops, the force of the spring 815 pushes the pawl 814 against the ratchet 813 to stop it from rotating in the opposite direction. When the rope 5 needs to be released, the knob 87 can be pulled outward to cause the shaft 82 to disengage the driven gear 811 from the driving gear 810. Then, the knob 87 is rotated in the opposite direction to loosen the rope 5. After the knob 87 is released, the spring 86 pushes the limit ring 85 to reset the shaft 82, allowing the driven gear 811 to re-engage with the driving gear 810. Thus, the rope 5 can be easily wound and released through the rope winding assembly 8.

[0048] Working principle: When the device is used to reduce the volume of the suitcase, since the pull rope 5 passes through the rope holes 43 on multiple connecting blocks 42 in sequence, and the folding suitcase 3 is fixed between the two fixed frames 41, the pull rope 5 can be wound to pull the two connecting components 4 closer together to fold the folding suitcase 3, thereby reducing the volume of the suitcase. Turning the knob 89 causes the rotating shaft 88 to drive the drive gear 810 to rotate. At this time, through the meshing connection, the drive gear 810 can drive the winding disc 83 to rotate to wind the pull rope 5, so that the pull rope 5 is wound on the inner cylinder of the winding disc 83, thereby compressing and folding the suitcase 3. When it is necessary to release the pull rope 5, the knob 87 can be pulled outward to cause the rotating shaft 82 to drive the passive gear 811 to disengage from the drive gear 810. Then, the knob 87 is turned in the opposite direction to release the pull rope 5.

Claims

1. An ultra-lightweight trolley case comprising a case one (1) and a case two (2), characterized in that: The box one (1) and the box two (2) are provided with connecting assemblies (4) on the side close to each other, folding boxes (3) are arranged between the two connecting assemblies (4), the folding boxes (3) are installed between the box one (1) and the box two (2) through the two connecting assemblies (4), and the folding boxes (3) are folded to make the box one (1) and the box two (2) close to each other to reduce the size of the trolley case. The outer ends of the two connecting assemblies (4) are wound with a pull rope (5), the folding boxes (3) are kept in the folded state by tightening the pull rope (5), and the top of the box one (1) is provided with a rope winding assembly (8); the pull rope (5) is kept in the tightened state through the rope winding assembly (8).

2. The ultra-lightweight trolley case according to claim 1, characterized in that: The outer end of the box one (1) is rotatably connected with a box cover (6), a zipper (7) is arranged between the outer edge of the box cover (6) and the box one (1), two universal wheels (9) are arranged at the bottom of the box one (1) and the box two (2), and a telescopic pull rod (10) is arranged at the outer end of the box two (2).

3. The ultra-lightweight trolley case according to claim 1, characterized in that: The connecting assembly (4) comprises a fixed frame (41), the box one (1) and the box two (2) are fixedly connected with the fixed frame (41) on the side close to each other, and the folding boxes (3) are connected with the two fixed frames (41) on the two sides, respectively.

4. The ultra-lightweight trolley case according to claim 3, characterized in that: The outer end of the fixed frame (41) is fixedly connected with a plurality of connecting blocks (42), the outer end of the plurality of connecting blocks (42) is provided with a rope penetrating hole (43) matched with the pull rope (5), the pull rope (5) penetrates the rope penetrating holes (43) of the plurality of connecting blocks (42) on the two fixed frames (41) in sequence, and the two fixed frames (41) are kept close to each other by tightening the two ends of the pull rope (5).

5. The ultra-lightweight trolley case according to claim 1, characterized in that: The rope winding assembly (8) comprises a mounting frame (81) and a rotating shaft one (82), the mounting frame (81) is fixedly installed on the top of the box one (1), the rotating shaft one (82) penetrates the mounting frame (81), a winding reel (83) is fixedly installed at the outer end of the rotating shaft one (82), a fixed nail (84) is fixedly installed on the inner side of the winding reel (83), the pull rope (5) is sleeved on the outer end of the fixed nail (84), and the winding reel (83) is used for winding the pull rope (5) on the inner side of the winding reel (83) by rotating.

6. The ultra-lightweight trolley case according to claim 5, characterized in that: The rope winding assembly (8) further comprises a rotating shaft two (88), the rotating shaft two (88) penetrates the mounting frame (81), a driving gear (810) is fixedly installed at the outer end of the rotating shaft two (88), a driven gear (811) is fixedly installed on the outer side of the winding reel (83), the driving gear (810) and the driven gear (811) are in meshing connection, a limiting ring (85) is fixedly installed at the outer end of the rotating shaft one (82), a spring one (86) is sleeved on the outer end of the rotating shaft one (82), the spring one (86) is located between the limiting ring (85) and the side wall of the mounting frame (81), and a knob one (87) is fixedly installed at one end of the rotating shaft one (82).

7. The ultra-lightweight trolley case according to claim 6, characterized in that: The rope collecting assembly (8) further comprises a housing (812) fixedly installed at the outer end of the mounting rack (81), a spring two (815) fixedly installed on the inner wall of the housing (812), and a pawl (814) rotatably connected to the inner wall of the housing (812), a ratchet wheel (813) fixedly installed at the outer end of the rotating shaft two (88), and the pawl (814) driven by the force of the spring two (815) to make the ratchet wheel (813) rotate in one direction, and the rotating shaft two (88) fixedly installed with a knob two (89) at one end.

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