Multifunctional traveling case with scientific structure, accurate control and double-bin loading
By installing a multi-functional metal base plate and related components at the bottom of the suitcase, the problems of difficult walking control and insufficient cargo capacity are solved, realizing a suitcase design that is easy to control and enhances cargo capacity.
Patent Information
- Application Number
- CN202511755745.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-21
- Publication Date
- 2026-01-23
AI Technical Summary
The existing suitcase walking control system is not directly connected to the casters, which makes control difficult and limits its carrying function, failing to meet the diverse needs of travelers.
By installing a multi-functional metal base plate at the bottom of the suitcase, the walking control system is directly connected to the casters. A brake support rod, movable outer compartment, and battery box are also installed on the base plate, enhancing the carrying capacity and control precision.
It allows for easy control of the suitcase's direction of travel, increases carrying capacity and versatility, and provides convenient storage and security for items.
Smart Images

Figure CN121369841A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of suitcase technology, and in particular to a multifunctional suitcase with a scientifically designed and precisely controlled dual-compartment design for carrying cargo. Background Technology
[0002] Travel has become one of the most important ways of life for humans: for studying, working, traveling, visiting relatives and friends. Travel is about pursuing a higher quality of life: firstly, one must have all the necessary necessities; secondly, one must have the tools to carry these necessities, making suitcases the preferred choice. Today, in every corner of the world, travelers carry a suitcase, and some even drag two.
[0003] Existing suitcases have functional defects:
[0004] 1. Structural and functional defects: The suitcase's movement control system is not directly connected to the casters. Instead, it relies on the soft-close casing to transmit movement commands to the casters. Only after receiving the commands from the soft-close casing do the casters begin to move in different directions, at different speeds. Controlling a suitcase is more strenuous than controlling a car steering wheel.
[0005] 2. Defects in cargo carrying function: Current suitcases have limited cargo carrying function and small carrying capacity. They are like a cargo truck without a cargo box, running naked with only the front, unable to meet the expectations of travelers.
[0006] At train stations, bus stations, docks, and airport terminals, many people drag suitcases in their left hand, carry backpacks on their backs, woven bags on their shoulders, and plastic bags in their right hands, containing baby food, fruits, drinks, and hygiene products. Summary of the Invention
[0007] This invention addresses the shortcomings of existing suitcase walking control systems, which do not directly connect to the casters and rely on a soft-sided enclosure to transmit walking commands to the casters. It also addresses the limitations of existing suitcases, such as limited carrying capacity and inability to meet the needs of travelers, by inventing a scientifically structured, precisely controlled, dual-compartment suitcase.
[0008] Lay the suitcase flat; the part in contact with the ground is the bottom, and the top is the lid. Stand the suitcase upright; the part with the handle is the top, and the part with the wheels is the bottom. The two sides of the suitcase are the left and right sides.
[0009] (a) Directly connect the existing suitcase walking control system and casters.
[0010] 1. This invention requires a metal plate to directly connect the existing suitcase's walking control system and casters; 2. To directly connect the existing suitcase's walking control system and casters, the four casters must first be interconnected, which also requires a metal plate; 3. To improve the functionality of existing suitcases, increase carrying capacity, and create a movable external compartment, this invention also requires a solid, flat metal base plate as a foundation. Therefore, the first step of this invention is to manufacture a multifunctional metal base plate according to the shape and area of the bottom of existing suitcases.
[0011] 2. Fabricate positioning sleeves on multi-functional metal base plates;
[0012] 3. Align and connect the multi-functional metal base plate with the bottom of the enclosure:
[0013] 4. Install casters at the four corners of the multi-functional metal base plate;
[0014] 5. Make 5mm diameter lock holes at 3cm intervals on the narrow sides of the two fixed pull tubes of the suitcase;
[0015] 6. Insert the end of the fixed pull tube of the suitcase into the positioning sleeve to secure it;
[0016] 7. The fixed pull tube of the series of suitcases of the present invention is 15MM high and close to the bottom of the suitcase, and the movable pull tube is 10MM high. Only the width is configured differently according to the size and specifications of the suitcase. The positioning sleeve is configured according to the specifications of the fixed pull tube.
[0017] The handle, pull rod, positioning sleeve, metal base plate, and casters are connected into a unified and complete control system. The handle directly controls the speed of the casters and their direction of travel (east or west).
[0018] The handle is easy to control, and commands are accurately transmitted. The suitcase no longer bears the high-frequency, high-intensity stretching and friction of the metal parts such as the pull rod and casters, making carrying things the sole function of the suitcase.
[0019] (II) Establishing a movable outer compartment for the suitcase based on a multi-functional metal base plate
[0020] 1. Two sections of movable outer casing pipe are installed parallel to each other on both sides of the front and rear center lines of the multi-functional metal base plate;
[0021] 2. Fabricate two sections of inner tubing for the movable outer compartment according to the specifications of the outer tubing.
[0022] 3. Install a button handle at one end of the inner tube of the active outer compartment and a pull-tube lock at the other end;
[0023] 4. Insert the end equipped with the pull-tube lock into the outer tube of the movable outer compartment;
[0024] 5. Install two hanging rings on each of the left and right sides of the suitcase for connecting and locking the locking straps;
[0025] Travelers simply place items they've been carrying on their shoulders, backs, or hands—including those that can't fit in their suitcases—into the movable outer compartment, lock it with the straps, and move on easily. A mother pulls her suitcase in one hand and holds her child's hand in the other, a scene brimming with family love and happiness.
[0026] (III) Install brake support rods on multi-functional metal base plate
[0027] 1. Install a tapered brake support rod between the two outer tubes of the movable outer compartment at the bottom edge where the multi-functional metal base plate and the bottom of the box are connected;
[0028] 2. Install two small ball bearing clips on each side of the brake support rod, front and back;
[0029] When braking is needed, tap the brake support lever with your toe. The lever immediately changes from being parallel to the multi-functional metal base to being perpendicular to it, raising the entire rear half of the suitcase. The casters at both ends of the brake support lever also lift off the ground as the multi-functional metal base rises. When you want to leave, hook the brake support lever with your toe. The lever immediately changes from being perpendicular to the multi-functional metal base to being parallel to it, and all four casters of the multi-functional metal base touch the ground. The suitcase follows the person. The brake support lever then becomes the rear handle of the suitcase.
[0030] (iv) Install the battery box on the multi-functional metal base plate
[0031] 1. Install a rectangular metal battery box in the middle of the front and rear center lines of the multi-functional metal base plate, between the two outer tubes of the movable outer compartment:
[0032] 2. The battery box has four reverse edges, and the reverse edges are covered with velvet strips to prevent dust and rainwater from entering.
[0033] 3. The battery box is fixed to the multi-functional metal base plate with hinges;
[0034] The battery box can hold four 1865 lithium batteries connected in parallel, with a total storage capacity of 22,000 mAh. It also comes with a standard smart charger that automatically stops charging when fully charged.
[0035] (v) Install a red anti-rear-end collision light in front of the battery box along the center line of the multi-functional metal base plate. In foggy, rainy, and dark weather, this light will alert pedestrians and vehicles behind to keep a safe distance. Attached Figure Description
[0036] Appendix Figure 1 Front view of the suitcase
[0037] Appendix Figure 2 Side view of the suitcase (button handle, pull rod, positioning sleeve, metal base plate, and casters are tightly connected into a control system).
[0038] Appendix Figure 3 Front view of the outer compartment of the suitcase (with the outer compartment closed)
[0039] Appendix Figure 4 Side view of the outer compartment of the suitcase (with the outer compartment open and the suitcase in motion).
[0040] 1. Handle 2. Top 3. Body 4. Bottom 5. Casters 6. Button Handle 7. Movable Pull Tube 8. Fixed Pull Tube 9. Positioning Sleeve 10. Multifunctional Metal Base Plate 11. Movable Outer Compartment 12. Locking Ring 14. Outer Tube of Movable Outer Compartment 15. Inner Tube of Movable Detailed Implementation
[0041] Suitcases are traditional household items, initially wooden boxes, then leather trunks, and now made of Oxford cloth, injection-molded plastic, or stamped from sheet metal and aluminum. Ninety years ago, someone attached wheels to suitcases, allowing them to be pulled by belts. In 1991, Adele Fendi added a pull handle, creating the suitcase we know today. Suitcases have evolved through continuous repairs and modifications.
[0042] There is a difference between a suitcase and a rolling suitcase: a rolling suitcase is loaded at point A, unloaded at point B, and then loaded again at point B and returned to point A. It is mostly used by small vendors. A suitcase is packed with everything needed for the trip when you go out, and you eat and use it while you go. When you return home at the end of the trip, the suitcase is empty.
[0043] Currently, the three main load-bearing components of suitcases produced and used are independent and unconnected. They are manually glued piece by piece to different parts of the suitcase body, existing only on the body and relying on the body to transmit force. The suitcase's movement control system is not directly connected to the casters; instead, the soft-sided casing transmits movement commands to the casters, which then begin to move according to the commands. Controlling a suitcase is more strenuous than controlling a car steering wheel. The suitcase body is thin and brittle, unable to withstand the repeated stretching and friction of the handle and casters, easily deforming and cracking, resulting in a very short lifespan.
[0044] Modern suitcases have limited carrying capacity and are like a cargo truck without a cargo box, running naked with only the cab, unable to fulfill the traveler's expectations.
[0045] At train stations, bus stations, docks, and airport terminals, many people drag suitcases in their left hand, carry backpacks on their backs, woven bags on their shoulders, and plastic bags in their right hands, containing baby food, fruits, drinks, and hygiene products.
[0046] Suitcases currently being manufactured and used have serious functional defects:
[0047] Firstly, the suitcase's movement control system is not directly connected to the casters. Instead, it relies on the soft case to transmit movement commands to the casters. Only after receiving the movement commands from the soft case will the casters begin to move east or west, and at different speeds.
[0048] Secondly, suitcases have limited functionality and small carrying capacity, making them unable to meet the expectations of travelers.
[0049] Specific Implementation Plan 1: Directly connect the existing suitcase walking control system and casters.
[0050] Appendix Figure 1 Appendix Figure 2
[0051] To directly connect the existing suitcase's movement control system to the casters, the four casters must first be moved from the bottom of the soft-sided suitcase to a multi-functional metal base plate, unifying the four casters that were previously scattered at the bottom of the soft-sided suitcase onto the unified multi-functional metal base plate. Secondly, by connecting the fixed pull tube to the multi-functional metal base plate, the existing suitcase movement control system and casters can be directly connected.
[0052] 1. Based on the existing shape and area of the bottom of the suitcase, manufacture a multi-functional metal base plate.
[0053] 2. According to the specifications of the luggage's fixed pull tube and the connection position of the multi-functional metal base plate, make a metal positioning sleeve. Make one end of the metal positioning sleeve reversed, and weld the reversed metal positioning sleeve to the multi-functional metal base plate at the connection between the luggage's fixed pull tube and the multi-functional metal base plate to form a positioning sleeve for connecting the multi-functional metal base plate and the fixed pull tube;
[0054] The luggage's fixed pull tube is perpendicular to the multi-functional metal base plate. Both the luggage's fixed pull tube and the multi-functional metal base plate are very thin metal plates, which are easy to weld. However, it is difficult for the weld joint to bear the walking commands of the existing luggage walking control system to control the casters, because the weld seam of the thin metal plate is also very thin. Therefore, the weld seam is reinforced by reverse edge welding.
[0055] 3. Align and secure the multi-functional metal base plate with the bottom of the box;
[0056] 4. Make a crimping washer according to the specifications of the metal positioning sleeve and put it on the bottom of the metal positioning sleeve. Use rivets to rivet the rough edges at the bottom opening of the box, the bottom, and the metal base plate together to make the inside of the box smooth and flat.
[0057] 5. Then install the four casters on the metal base plate.
[0058] 6. Insert the luggage's fixing tube into the positioning sleeve, secure it with screws at the bottom, and weld it in place at the top.
[0059] The handle, pull rod, positioning sleeve, metal base plate, and casters are connected to form an independent and complete control system. The handle directly controls the speed of the casters and their direction of travel (east or west).
[0060] The handle is easy to control and commands are accurately transmitted. The suitcase body no longer bears the high-frequency, high-intensity stretching and friction from the pull rod and casters; carrying items becomes the sole function of the suitcase body.
[0061] 7. In all specifications of the suitcases of this invention, the fixed pull tube height is 15mm, and the movable pull tube height is 10mm; only the width varies depending on the suitcase's specifications and size. Because the fixed pull tube height is 15mm, the bottom of the suitcase is essentially a flat surface. The flat and spacious interior greatly increases the suitcase's carrying capacity.
[0062] 8. On the narrow sides of the two fixed pull tubes of the suitcase, make lock holes with a diameter of 5 mm at a distance of 3 cm; in addition, all specifications of the suitcases of this invention are equipped with ZL202323525896.9 series mechanical chain locks. The pull rod of this series of suitcases is segmentless and can be raised and lowered freely, and has an automatic locking function.
[0063] Specific Implementation Plan Two: Using a multi-functional metal base plate as a foundation to create a movable external compartment for the suitcase.
[0064] Appendix Figure 3 Appendix Figure 4
[0065] Existing suitcases have limited functionality and small carrying capacity, failing to meet travelers' expectations. This invention uses a multi-functional metal base plate as a foundation to create a movable external compartment in the suitcase. Without this multi-functional metal base plate, it is impossible to create a movable external compartment on a soft-sided suitcase.
[0066] 1. To create a movable external compartment in an existing suitcase, the top or sides are not suitable; the only option is to place it at the bottom. Use casters to raise the bottom of the suitcase by 6-7 centimeters, creating a suitable space for this compartment.
[0067] 2. To create a movable outer compartment in an existing suitcase, space is essential, but a solid, stable, and flat surface is also required. A multi-functional metal base plate possesses these characteristics, making it the foundation for movable outer compartments.
[0068] 3. On both sides of the center line of the front and rear of the multi-functional metal base plate, near the casters, weld two rectangular movable outer tube sections. The left and right outer tubes of the movable outer tube should be parallel and parallel to the multi-functional metal base plate.
[0069] 4. Make 5mm diameter keyholes at 3cm intervals on the narrow sides of the two outer tubes.
[0070] 5. According to the specifications of the outer tube of the movable outer compartment, manufacture two rectangular inner tubes for the movable outer compartment.
[0071] 6. One end of the inner tube of the movable outer compartment is connected to a handle button, and the other end is fitted with a ZL202323525896.9 series mechanical chain lock. The end with the mechanical chain lock is inserted into the outer tube of the movable outer compartment. All specifications of the movable outer compartment of this invention are equipped with a ZL202323525896.9 series mechanical chain lock. The inner tube of this movable outer compartment is segmentless and can be raised and lowered freely, and has an automatic locking function.
[0072] 7. Press the handle button, and the inner tube of the movable outer chamber can rise and fall freely inside the outer tube. Release the handle button, and the inner tube can automatically lock in any position inside the outer tube.
[0073] 8. Install two hanging rings on each side of the suitcase, and provide locking straps to secure items in the outer compartment.
[0074] 9. This invention creates a movable outer compartment for suitcases, pioneering a new function for suitcases.
[0075] (1) Fresh food, fruits, milk and beverages that cannot be put into the suitcase should be placed in a cardboard box, placed on the outer compartment and locked with buckles for easy access.
[0076] (2) The clothes, toys, tableware, food, medicine, tissues and garbage bags that the mother and child need to carry when traveling should be put into a cardboard box, placed on the outer compartment, and locked with buckles. It is safe, sturdy and convenient to use at any time.
[0077] (3) Music lovers can put the violin, pipa, erhu, accordion and saxophone on the outer cover and put them on the outer compartment, and lock them with the buckle and locking strap, which is safe and sturdy.
[0078] (4) Nowadays, many people live a migratory lifestyle, traveling from north to south in winter and returning in spring. Down jackets, leather coats, leather hats, and fur shoes are indispensable. They take them all off when crossing the Yellow River and put them all back on when returning. When not wearing them, they put them in plastic bags, store them on the outer shelf, and lock them with buckles and straps, making it easy to take them off and put them on.
[0079] (5) Some people carry two suitcases, one in their left hand and one in their right, which prevents them from going through security, boarding the high-speed rail, or crossing the road. Now, one suitcase can be placed on the outer compartment of the other suitcase and secured with a buckle and locking strap to prevent it from slipping off, allowing for easy travel and exploration.
[0080] (6) Nowadays, more and more people go out to take photos, shoot videos, sing, and dance. After one stop, you can put the microphone stand, camera tripod, speaker, clothing, and cosmetics on the outer compartment, lock them with the buckle, and easily go to the next attraction.
[0081] (7) If you like to travel with your pet, you can prepare a basket for your pet, put your pet in the basket, tie the basket to the U-shaped bar on the outside of the basket, and lock it with the buckle and lock it, so you can travel easily.
[0082] (8) When a mother is traveling with her infant, she can prepare a soft bed for the infant, put the infant in the soft bed, cover him with a quilt, tie the soft bed to the U-shaped bar in the outer compartment, and lock it with a buckle. Mother and child can travel together intimately.
[0083] The suitcase with a movable outer compartment is not only easy to control and transmits instructions accurately, but is also very convenient to use.
[0084] (1) Before traveling, sort out the items you want to bring. Put all the items that can fit in the suitcase into the suitcase, zip it up, and lock it. Stand the suitcase upright and let the four casters support the weight of the entire suitcase.
[0085] (2) Hold the top handle of the box with your left hand and tilt the box back a few degrees. Reach your right hand to the bottom of the box, press the handle button, and pull out the movable outer compartment. Release the handle button, and the movable outer compartment will be locked in place.
[0086] (3) Place all items that cannot be put into the suitcase, as well as items that cannot be put into the suitcase, on the outer compartment and secure them with the buckle straps. Then you can travel.
[0087] (4) After the trip, lay the suitcase flat, remove the buckle and locking straps and put the items inside the suitcase for storage, and remove the items from the outer compartment.
[0088] (5) Open the suitcase and check the contents. After checking, close the suitcase and zip it up.
[0089] (6) Press and hold the handle button to push the movable outer compartment all the way into the outer tube, so that it is hidden under the metal base plate.
[0090] Specific Implementation Plan 3: Install brake support rods on the multi-functional metal base plate.
[0091] When travelers stop on trains, buses, or ships, or rest in shopping malls, they need to keep their suitcases close to them to prevent them from slipping away. This necessitates the inclusion of a braking device in the suitcase. The brake support rod on this suitcase is one such braking device.
[0092] 1. To install a brake support bar on an existing suitcase, it must be placed at the bottom of the suitcase. The four casters should raise the bottom of the suitcase by 6 to 7 centimeters, providing sufficient space for the brake support bar. In addition to this space, a solid, stable, and flat bottom is also necessary. A multi-functional metal base plate possesses these characteristics, making it the foundation for installing a brake support bar.
[0093] The brake support rod of the two suitcases resembles a cone-shaped handle, 13cm long, 4 to 6cm high at both ends, and 7cm high at the middle cone. It weighs about 200 grams in total. It is perpendicular to the center line of the multi-functional metal base plate and is fixedly installed at the rear end of the multi-functional metal base plate, allowing it to rotate 90 degrees back and forth.
[0094] 3. When braking is needed, press the brake support lever with your toe. The brake support lever immediately changes from being parallel to the multi-functional metal base plate to being perpendicular to it. The two small tabs on the brake support lever also change from being perpendicular to the multi-functional metal base plate to being parallel to it, and fall into the small clutches and are secured. The brake support lever raises the rear half of the multi-functional metal base plate by 5 mm to 10 mm, and the casters at both ends of the support lever also rise by 5 mm to 10 mm and leave the ground. The entire weight of the rear half of the suitcase rests on the brake support lever, effectively securing the suitcase to your side.
[0095] When the four people were about to leave, they hooked the brake support rod with their toes. The brake support rod immediately changed from being perpendicular to the multi-functional metal base to being parallel to it, and then fell into the small clutch and was secured. All four casters mounted on the multi-functional metal base also landed on the ground. The suitcase followed behind them.
[0096] Specific Implementation Plan Four: Install the battery box on the multi-functional metal base plate of the suitcase.
[0097] In today's society, mobile phones have become an indispensable part of people's lives. They are not only communication tools but also multifunctional devices integrating entertainment, learning, and work. To ensure that the phone functions properly at all times, especially while traveling, it's essential to guarantee its continuous operation. Installing a battery compartment on the multifunctional metal base of the suitcase to store sufficient power is the only safe option.
[0098] 1. Install a rectangular metal battery box measuring 8.5cm × 10cm × 2cm between the two outer tubes of the movable outer compartment at the center of the front and rear center lines of the multi-functional metal base plate.
[0099] 2. The battery box has four reverse sides, and velvet strips are attached to the reverse sides to prevent dust and rainwater from entering.
[0100] 3. The battery box is fixed to the multi-functional metal base plate with hinges.
[0101] The battery compartment can hold four 1865 lithium batteries connected in parallel, with a storage capacity of 22,000 mAh, enough for a week's worth of mobile phone power. It also comes with a standard smart charger that automatically stops charging when fully charged.
[0102] Specific Implementation Plan Five: Install a red anti-rear-collision light in front of the battery box along the center line of the front and rear of the multi-functional metal base of the suitcase. In rainy, foggy, or nighttime conditions, activating the red anti-rear-collision light will alert pedestrians and vehicles behind to maintain a safe distance.
[0103] The techniques implemented in this invention will be clearly and completely described with reference to the accompanying drawings. The described embodiments are merely possible technical implementations of this invention and not all possible implementations. Those skilled in the art can, in conjunction with the embodiments of this invention, obtain other embodiments without inventive effort, and these embodiments are also within the protection scope of this invention.
Claims
1. A multi-functional suitcase with a scientifically designed and precisely controlled dual-compartment design, characterized in that: The suitcase includes: a fixed pull tube, a positioning sleeve, a multi-functional metal base plate, casters, an outer tube for the movable outer compartment, an inner tube for the movable outer compartment, a pull rod lock, a button handle, a hanging ring, and a locking strap; Existing suitcases are products of the agricultural era and suffer from serious functional defects: The suitcase's walking control system is not directly connected to the casters. Instead, it relies on the soft case to transmit walking commands to the casters. Only after receiving the walking commands from the soft case will the casters start to move east or west, and at different speeds. Suitcases have a limited carrying capacity and are like a cargo truck without a cargo box, running naked with only the cab, unable to fulfill the traveler's expectations. The control system and casters are connected using a multi-functional metal base plate; Fix the positioning sleeve to the multi-functional metal base plate; Install casters at the four corners of the multi-functional metal base plate; Insert the end of the fixing tube into the positioning sleeve for fixation; A mobile outer warehouse was built using a multi-functional metal base plate as a foundation. Two sections of movable outer tubes are installed in parallel on both sides of the front and rear center lines of the multi-functional metal base plate; According to the specifications of the outer tube of the movable outer compartment, two sections of inner tube of the movable outer compartment shall be manufactured; A button handle is installed at one end of the inner tube of the outer compartment, and a pull-tube lock is installed at the other end; Insert the end of the inner tube of the movable outer compartment equipped with the pull-pipe lock into the outer tube of the movable outer compartment; The two hanging loops on the left and right sides of the suitcase are connected to the locking straps to secure the outer compartment. Using the same multi-functional metal base plate and installed in the same place, they serve the same purpose of improving the functional defects of the suitcase, hence they are applied for together.
2. The multifunctional metal base plate according to claim 1, characterized in that, A brake support rod is installed on the multi-functional metal base plate. The brake support rod is installed on the bottom edge where the multi-functional metal base plate connects to the bottom of the box, perpendicular to the two outer tubes of the movable outer compartment. Two small ball bearings are installed on each side of the brake support rod, front and back.
3. The multifunctional metal base plate according to claim 1, characterized in that, A battery box is installed between the two outer tubes of the movable outer compartment in the middle section of the front and rear center lines of the multi-functional metal base plate. The battery box has reversed edges on all four sides, and velour strips are attached to the reversed edges to prevent dust and rainwater from entering; the battery box is fixed to the base plate with hinges.
4. The multifunctional metal base plate according to claim 1, characterized in that, A red anti-rear-end collision light is installed between the two outer tubes of the movable outer compartment in front of the multi-functional metal base plate.
Citation Information
Patent Citations
Drawbar telescoping control locking device, telescopic draw bar and draw-bar box
CN221635197U