Multifunctional suitcase

Abstract

The present application discloses a multifunctional luggage case, comprising a mother case and a child case, wherein two front universal wheels are symmetrically installed on one side of the bottom of the mother case, and a support seat is installed on the other opposite side, the support seat can be horizontally movably connected to the mother case, and two rear universal wheels are symmetrically installed on the bottom of the support seat; the child case is hingedly arranged on the mother case at one side close to the rear universal wheels, and the multifunctional luggage case has a riding state and a storage state, wherein in the riding state, the child case deflects downward and abuts against the lower part of the mother case, and the bottom of the child case abuts against the top of the support seat, and the two rear universal wheels are limited by a limiting structure, so that the rear universal wheels are changed into directional wheels, wherein in the storage state, the child case deflects upward and abuts against the upper part of the mother case. The multifunctional luggage case provided by the present application has both storage function and riding function, and is convenient to use and safe to ride.

Description

Technical Field

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

[0002] The existing luggage box structure often adds a "riding" position by deforming the box body, so that the suitcase can have both a storage function and a function for children to ride (ride) on, so that they can rest and have better entertainment fun.

[0003] In the prior art, a utility model patent with publication number CN210539415U discloses a detachable riding multifunctional suitcase, which includes a main case, rollers, a pull rod, a handle, a sub-case, a first zipper and a second zipper, wherein the main case is L-shaped, including an integrally formed pushing part and a riding part, wherein the first zipper is arranged in the middle of the peripheral side of the main case, and the second zipper is arranged in the middle of the peripheral side of the sub-case, and the shapes of the main case and the sub-case are adapted to each other and are interlocked and connected to form an integral suitcase.

[0004] This riding-type multifunctional suitcase is no different from an ordinary suitcase when used as a suitcase. However, when it is converted into a riding state, there is a problem of the center of gravity being biased backwards, and it is easy for children to lean backwards when riding on it, which poses a major safety problem. Summary of the invention

[0005] The embodiment of the present application provides a multifunctional suitcase, which has both a storage function and a riding function. At the same time, since the support base can move relative to the mother box body, and the two rear universal wheels are installed at the bottom of the support base, when it is converted to a riding state, the two rear universal wheels will be relatively away from the two front universal wheels, thereby solving the problem that the center of gravity of the suitcase is biased to the rear and is easy to tilt backward in the riding state, and it is safer to use.

[0006] The embodiment of the present application provides a multifunctional luggage case, comprising a main case and a sub-case, wherein the sub-case is hingedly arranged on the main case, two front universal wheels are arranged at one end of the bottom of the main case away from the sub-case, and the two front universal wheels are symmetrical about the horizontal central axis of the bottom of the main case, a support seat is arranged at the bottom of the main case and at one end close to the sub-case, and the support seat moves relative to the main case, and two rear universal wheels are arranged at the bottom of the support seat, and the two rear universal wheels are symmetrical about the horizontal central axis of the bottom of the main case;

[0007] The multifunctional suitcase has a riding state and a storage state; wherein, in the riding state, the sub-box body is flipped downward and abutted against the lower part of the main box body, and the bottom of the sub-box body abuts against the support seat, wherein, in the storage state, the sub-box body is flipped upward and abutted against the upper part of the main box body.

[0008] In one possible implementation, a control button is provided on the support seat, and two guide rods are provided at one end of the support seat close to the mother box body, the two guide rods are symmetrical about the horizontal central axis of the bottom of the mother box body, and are respectively vertically connected to the two ends of the control button, and the mother box body is provided with a guide sleeve that slides with the guide rod, and the guide rod is connected to a locking structure, and the locking structure is configured as: when the control button is pressed, the guide rod and the guide sleeve can be unlocked, so that the support seat can move in a directional manner relative to the mother box body; when the control button is released, the guide rod and the guide sleeve can be locked.

[0009] In a possible implementation, the locking structure includes a return spring, two locking rods and a cavity for placing the control button and the return spring, the control button is provided with a pressing protrusion at one end away from the mother box, the pressing protrusion passes through the outer wall of the cavity, the return spring is connected between the control button and the inner wall of the cavity, the two locking rods are coaxially embedded in the two guide rods, respectively, and are gap-matched with the guide rods, the outer ends of the two locking rods are respectively vertically connected to the two ends of the control button, the inner end of the locking rod is symmetrically provided with two limiting grooves along the radial direction, a locking block is connected to the limiting groove in a hinged manner, and the guide rod is provided with a avoiding hole matching with the locking block;

[0010] When the control button is pressed, the locking rod moves inward and drives the locking block to rotate through the limiting groove and away from the guide sleeve, thereby unlocking the guide rod and the guide sleeve; when the control button is released, the locking rod moves outward and drives the locking block to rotate through the limiting groove and pass through the avoidance hole to abut against the inner wall of the guide sleeve, thereby locking the guide rod and the guide sleeve.

[0011] In one possible implementation, the locking block is a wedge-shaped block, including a rotating middle part and a hinged part and a locking part extending from the rotating middle part at a predetermined angle, the rotating middle part is vertically connected to the guide rod through a rotating shaft, the hinged part is hinged in the limit groove, the locking part is close to the side walls of the guide rod and the guide sleeve, and the avoidance hole extends along the axial direction of the guide rod.

[0012] In a possible implementation, a notch suitable for storing the sub-box is provided on the upper portion of the main box, and the outer contour of the sub-box matches the contour of the notch.

[0013] In one possible implementation, a guide rod is symmetrically installed on the side wall of the support seat close to the mother box body, and a plurality of limit protrusions are axially spaced on the surface of the guide rod. The mother box body is provided with a guide hole that slides with the guide rod, and a limit groove or a limit hole that cooperates with the limit protrusion is provided in the guide hole.

[0014] In a possible implementation, the top of the support seat is vertically connected to a directional moving block via a first return spring, and when the sub-box abuts against the support seat in the riding state, the directional moving block faces the sub-box, and the directional moving block is in an isosceles trapezoidal shape, with the large end of the directional moving block located at the top, and two oblique side surfaces of the directional moving block face the two rear universal wheels respectively;

[0015] The support seat is symmetrically connected to limit rods on both sides of the directional moving block, and the limit rod is coaxially connected to an end of the limit rod close to the directional moving block, and a second return spring is sleeved on the limit rod. A guide channel that matches the clearance of the limit rod is provided in the support seat in the horizontal direction, and a limit channel is coaxially provided at the inner side end of the guide channel, the inner diameter of the limit channel is larger than the inner diameter of the guide channel, and the limit channel matches the clearance of the end, the second return spring is located in the limit channel, and the end and the bottom wall of the limit channel are respectively connected at both ends;

[0016] The support seat is connected to the rear universal wheel via a wheel rod, and the inner side surface of the wheel rod is provided with a limiting space matched with the limiting rod.

[0017] In a possible implementation, the directional moving block is provided with a guide groove matched with the end head on the inclined side surface, and the guide groove extends along the height direction.

[0018] In a possible implementation, the top of the end head is a spherical structure.

[0019] In a possible implementation, an end of the limiting rod close to the rear universal wheel is connected to an arc-shaped limiting plate, and the limiting space is an arc-shaped groove that fits with the arc-shaped limiting plate.

[0020] Beneficial effects: Compared with the prior art, the multifunctional luggage case provided by the present application sets the rear universal wheel on the support seat, and the support seat can move relative to the mother case body. When riding, the support seat drives the rear universal wheel away from the front universal wheel, which can effectively solve the problem that the center of gravity of the riding luggage case is biased to the rear and is easy to lean back when riding.

[0021] In the riding state, the wheel rod can be fixed by the cooperation of the directional moving block and the limit rod, thereby converting the rear universal wheel into a directional wheel, which has strong directionality and is convenient for controlling the moving direction of the suitcase, making riding safer and more convenient to use. At the same time, the sub-box can provide additional riding area, making riding more comfortable.

[0022] These and other objects, features and advantages of the present invention will be fully reflected in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of the multifunctional suitcase of the present application in a riding state is shown.

[0024] Figure 2 A schematic diagram showing the process of the multifunctional suitcase of the present application being transformed from a storage state to a riding state.

[0025] Figure 3 A schematic diagram of the partial structure of the multifunctional suitcase of the present application in a riding state is shown.

[0026] Figure 4 A schematic diagram of the partial cross-sectional structure of the limit rod in the present application in different states is shown, wherein Figure a is a storage state and Figure b is a riding state.

[0027] Figure 5 A partial structural schematic diagram of the limiting rod in the present application is shown.

[0028] Figure 6 Shows this application Figure 1 Schematic diagram of the enlarged structure of part A.

[0029] Figure 7 A schematic structural diagram of the support base in the present application is shown.

[0030] Figure 8 A schematic diagram of the exploded structure of the support seat in the present application is shown.

[0031] Fig. 9 A schematic diagram of the structure of the locking rod in the storage state of the present application is shown.

[0032] Fig.10 A cross-sectional structural schematic diagram of the locking rod, the guide rod and the guide sleeve in the riding state of the present application is shown.

[0033] Reference numerals: 10-mother box, 101-avoidance notch, 11-front universal wheel, 12-rear universal wheel, 13-first hinge, 14-first connecting piece, 15-second connecting piece, 16-guide sleeve, 20-sub-box, 21-second hinge, 22-third connecting piece, 23-fourth connecting piece, 30-support seat, 301-guide channel, 302-limiting channel, 303-limiting space, 304-cavity, 305-avoidance hole, 31- Guide rod, 32-wheel rod, 311-control button, 312-guide rod, 313-pressing protrusion, 41-directional moving block, 411-oblique side surface, 42-limiting rod, 43-first return spring, 44-end, 45-second return spring, 46-arc-shaped limit plate, 401-guide groove, 51-return spring, 52-locking rod, 53-locking block, 531-hinge part, 532-rotating middle part, 533-locking part, 501-limiting groove. DETAILED DESCRIPTION

[0034] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0035] Those skilled in the art should understand that, in the disclosure of the specification, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0036] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0037] refer to Figures 1 to 6The embodiment of the present application provides a multifunctional luggage case, including a mother case 10 and a sub-case 20, wherein the sub-case 20 is hingedly arranged on the mother case 10. Two front universal wheels 11 are provided at one end of the bottom of the mother case 10 away from the sub-case 20, and the two front universal wheels 11 are symmetrical with the horizontal central axis of the bottom of the mother case 10. In addition, a support seat 30 is provided at the bottom of the mother case 10 and close to one end of the sub-case 20, and the support seat 30 moves relative to the mother case 10, so that the support seat 30 can be relatively close to the mother case 10 in the storage state, occupying a small space, and can also be relatively far away from the mother case 10 in the riding state, used to support the sub-case 20, so as to increase the gravity of the luggage case at the position of the support seat 30 in the riding state, thereby solving the problem of the center of gravity being biased to the rear and being easy to lean back. In addition, two rear universal wheels 12 are provided at the bottom of the support seat 30, and the two rear universal wheels 12 are symmetrical with the horizontal central axis of the bottom of the mother case 10;

[0038] The multifunctional suitcase has a riding state and a storage state, wherein in the riding state, the sub-box 20 is flipped downward and abutted against the lower part of the main box 10, and the bottom of the sub-box 20 abuts against the top of the support seat 30, and the two rear universal wheels 12 are limited by a limiting structure so that the rear universal wheels 12 are transformed into directional wheels, wherein in the storage state, the sub-box 20 is flipped upward and abutted against the upper part of the main box 10.

[0039] The multifunctional suitcase provided in the present application has two states, namely a riding state and a storage state. In the riding state, the child can ride on it. Based on the hinged relationship, the sub-box 20 flips diagonally downward and then abuts against the lower part of the main box 10. At the same time, the support seat 30 is relatively far away from the main box 10, and the sub-box 20 abuts against the top of the support seat 30. It can not only provide a larger riding area and improve riding comfort, but also make riding more stable based on the supporting effect of the support seat 30. In the riding state, the support seat 30 drives the rear universal wheel 12 away from the front universal wheel 11, thereby solving or greatly alleviating the problem that the center of gravity of the suitcase is biased to the rear and is easy to lean back in the riding state. In the storage state, based on the hinged relationship, the sub-box 20 flips diagonally upward and then abuts against the upper part of the main box 10. At the same time, the support seat 30 is relatively close to the main box 10, which reduces the occupied space and does not affect the normal storage function of the sub-box. It is very convenient to use. In one embodiment, combined with Figures 7 to 10The support seat 30 is provided with a control button 311, and the support seat 30 is provided with two guide rods 312 at one end close to the mother box body 10. The two guide rods 312 are symmetrical with the horizontal central axis of the bottom of the mother box body 10, and are respectively vertically connected to the two ends of the control button 311. Correspondingly, the mother box body 10 is provided with a guide sleeve 16 that slidably cooperates with the guide rod 312, wherein the guide rod 312 is connected with a locking structure, and the locking structure is configured as follows: when the control button 311 is pressed, the guide rod 312 and the guide sleeve 16 can be unlocked, so that the support seat 30 can be moved in a directional manner relative to the mother box body 10; and when the control button 311 is released, the guide rod 312 and the guide sleeve 16 can be locked, so that the control button 311 can be used to realize the control of the support seat 30 being relatively close to or away from the mother box body 10, and the structure is simple and easy to operate.

[0040] Further preferably, the locking structure includes a reset spring 51, two locking rods 52 and a cavity 304 for placing the control button 51 and the reset spring 52, wherein the end of the control button 311 away from the mother box 10 is provided with a pressing protrusion 313, and the pressing protrusion 313 passes through the outer wall of the cavity 304, wherein the reset spring 51 is connected between the control button 311 and the inner wall of the cavity 304, wherein the two locking rods 52 are coaxially embedded in the two guide rods 312 respectively, and are clearance-matched with the guide rods 312, and at the same time, the outer ends of the two locking rods 52 are respectively vertically connected to the two ends of the control button 311, and the inner end of the locking rod 52 is symmetrically provided with two limiting grooves 501 in the radial direction, and a locking block 53 is connected in the limiting groove 501 in a hinged manner, and a avoiding hole 305 matching the locking block 53 is provided on the guide rod 312;

[0041] When the control button 311 is pressed, the locking rod 52 moves inward and drives the locking block 53 to rotate through the limit groove 501 and away from the guide sleeve 16, thereby unlocking the guide rod 312 and the guide sleeve 16; when the control button 311 is released, the locking rod 52 moves outward and drives the locking block 53 to rotate through the limit groove 501 and pass through the avoidance hole 305 to abut against the inner wall of the guide sleeve 16, thereby locking the guide rod 312 and the guide sleeve 16 in a manner of forming friction resistance, fixing the support seat 30 on the mother box body 10, with good locking stability, and also convenient for flexible switching between the unlocking and locking states through the control button 311.

[0042] Further preferably, the locking block 53 is a wedge-shaped block, comprising a rotating middle portion 532 and a hinged portion 531 and a locking portion 533 extending from the rotating middle portion 532 at a predetermined angle, wherein the rotating middle portion 532 is vertically connected to the guide rod 312 through a rotating shaft, wherein the hinged portion 531 is hingedly arranged in the limiting groove 501, wherein the locking portion 533 is close to the side walls of the guide rod 312 and the guide sleeve 16, and at the same time, the avoidance hole 305 extends along the axial direction of the guide rod 312, so that during the locking or unlocking process of the locking block 53, the rotating shaft can be used as a rotation base point, so that the hinged portion 531 and the locking portion 533 can rotate in a directional manner around the rotating middle portion 532.

[0043] In one embodiment, a notch 101 suitable for storing the sub-box 20 is provided on the upper portion of the mother box 10, and the outer contour of the sub-box 20 is adapted to the contour of the notch to form a complete suitcase. In this way, when the suitcase is changed to a riding state, a larger accommodating space can be formed through the notch, providing a larger riding range and making riding more convenient. At the same time, a larger riding space can also alleviate the problem of the suitcase's center of gravity being biased to the rear.

[0044] When the suitcase is in a riding state, the sub-box body 20 and the notch 101 define a riding seat, wherein the riding seat has a seat depth of 240-280 mm, a seat width of 220-250 mm, and a height from the bottom wall of the riding seat to the bottom of the mother box body 10 of 270-350 mm. This size design can be more suitable for riding by children aged 3-7, and the riding is comfortable.

[0045] In addition, two footrests are provided at the lower part of the mother box body 10, and the two footrests are symmetrically arranged on the first side surface, so as to provide support for the soles of children's feet when children ride, making riding more convenient.

[0046] The footrest can be composed of a flat bottom wall with a groove structure, and can also be composed of a folding footboard at the lower part of the mother box 10. The folding foot pedal has a folded state that fits the mother box 10 and an unfolded state that is horizontally and perpendicular to the mother box 10. When the folding foot pedal is in the unfolded state, the folding foot pedal constitutes the footrest. When the folding foot pedal is in the folded state, the outer surface of the folding foot pedal does not protrude from the mother box 10. This design can make it more convenient for children to place their feet on the folding foot pedal.

[0047] The width of the footrest is 40-50 mm, which makes the support for the sole of the foot more comfortable and strong.

[0048] In one embodiment, a first hinge piece 13 is installed at the outer end of the bottom wall of the avoidance notch 101, and the sub-box body 20 is provided with a second hinge piece 21 which is foldably hinged to the first hinge piece 13. This hinge-type connection structure not only has good connection strength, but also has good folding strength, which can ensure the stability of the suitcase in two states at the same time.

[0049] In one embodiment, the inner wall of the avoidance notch 101 is provided with a first connecting member 14, and the lower part of the mother box 10 is provided with a second connecting member 15 directly below the avoidance notch 101, and the sub-box 20 is correspondingly provided with a third connecting member 22 and a fourth connecting member 23, wherein in the riding state, the second connecting member 15 and the fourth connecting member 23 cooperate with each other to ensure the stability and safety of the suitcase in the riding state, wherein in the storage state, the first connecting member 14 and the third connecting member 22 cooperate with each other to ensure the stability of the suitcase in the storage state, without affecting riding on airplanes, high-speed trains, trains, etc.

[0050] The first connecting member 14 and the third connecting member 22 are both magnetic parts, such as magnetic male buckles and magnetic female buckles that match each other, and have high connection strength, which can ensure the stability of the suitcase in the storage state.

[0051] The second connecting member 15 and the fourth connecting member 23 are both magnetic parts, such as magnetic male buckles and magnetic female buckles that match each other, and have high connection strength, which can ensure the stability of the suitcase in the riding state.

[0052] In one embodiment, the present application provides a simpler structural form for the way in which the support seat 30 moves relative to the mother box 10. The side wall of the support seat 30 is symmetrically installed with a guide rod 31 on one side close to the mother box, and a plurality of limiting protrusions are arranged on the surface of the guide rod 31 at intervals along the axial direction. Correspondingly, the mother box 10 is provided with a guide hole that slides with the guide rod 31, and a limiting groove or limiting hole that matches the limiting protrusion is arranged in the guide hole, thereby ensuring the stability of the horizontal movement of the support seat 30 through the sliding cooperation between the guide rod 31 and the guide hole. In addition, based on the cooperation between the limiting protrusion and the limiting groove or limiting hole, the guide rod 31 can be stably maintained at a specific extended length, such as the length of the supporting sub-box, such as the length retracted to the mother box, which is more convenient to use.

[0053] In one embodiment, the top of the support seat 30 is vertically connected with a directional moving block 41 through a first return spring 43. When the sub-box 20 abuts against the support seat 30 in the riding state, the directional moving block 41 faces the sub-box 20. The directional moving block 41 is in an isosceles trapezoidal shape, and the large end of the directional moving block 41 is located at the top. The two oblique side surfaces 411 of the directional moving block 41 face the two rear universal wheels 12 respectively.

[0054] The support seat 30 has limit rods 42 symmetrically connected to both sides of the directional moving block 41, and the end of the limit rod 42 close to the directional moving block 41 is coaxially connected to the end 44. The limit rod 42 is sleeved with a second return spring 45, and correspondingly, a guide channel 301 is provided in the horizontal direction in the support seat 30 to be clearance-matched with the limit rod 42, and a limit channel 302 is coaxially provided at the inner side end of the guide channel 301, wherein the inner diameter of the limit channel 302 is larger than the inner diameter of the guide channel 301, and the limit channel 302 is clearance-matched with the end 44, and the second return spring 45 is located in the limit channel 302, and the end 44 and the bottom wall of the limit channel 302 are connected at both ends respectively;

[0055] The support seat 30 is connected to the rear universal wheel 12 via a wheel rod 32 , and a limiting space 303 matching with the limiting rod 42 is provided on the inner side of the wheel rod 32 .

[0056] When the sub-box 20 is flipped downward and abutted against the support seat 30, a downward pressure is applied to the directional moving block 41 on the top, thereby causing the directional moving block 41 to move downward in a directional manner. During the downward movement, the two inclined side surfaces 411 of the directional moving block 41 will push the limiting rods 42 and the end heads 44 on both sides to move outward synchronously until the limiting rods 42 are inserted into the limiting space 303, which is equivalent to axially locking the wheel rods 32 on both sides of the limiting rods 42, so that the two rear universal wheels 12 can only rotate along the radial direction of the limiting rods 42, thereby converting the rear universal wheels 12 into directional wheels. Therefore, when the suitcase is converted from a storage state to a riding state, the rear universal wheels 12 are automatically converted into directional wheels through the action of the limiting structure during the downward movement of the sub-box 20, which can make the suitcase have a strong directionality, facilitate the movement of the suitcase, and further improve the safety of riding.

[0057] When the suitcase is changed from the riding state to the storage state, the force applied to the directional moving block 41 disappears, and the directional moving block 41 will move upward under the rebound action of the first return spring 43, and the limiting rods 42 on both sides will also move away from the rear universal wheel 12 under the rebound action of the second return spring 45, thereby unlocking the two directional wheels and making them universal wheels, which can be flexibly moved as a storage suitcase and easy to use.

[0058] In one embodiment, the directional moving block 41 is provided with a guide groove 401 on the inclined side surface 411, which is matched with the end head 44, wherein the guide groove 401 extends along the height direction of the inclined surface, and at the same time, the top of the end head 44 is a spherical structure, so that the guide groove 401 can provide a guiding effect for the limiting rod 42, so as to achieve the purpose of radial limiting, and avoid the limiting rod 42 from moving in directions other than the axial direction. At the same time, it can also provide a limiting effect for the directional moving block 41 in turn, and avoid the moving distance being too large and detaching from the support seat 30 when moving upward. In addition, the spherical structure at the top of the end head 44 can effectively reduce the friction resistance between the end head 44 and the directional moving block 41, so that the directional moving block 41 can move down or up faster with high sensitivity.

[0059] In one embodiment, the end of the limiting rod 42 close to the rear universal wheel 12 is connected to an arc-shaped limiting plate 46, and the limiting space 303 is an arc-shaped groove that fits with the arc-shaped limiting plate 46 in an embracing manner, so that the limiting effect of the limiting rod 42 on the wheel rod 32 can be greatly improved within the effective space range through this embracing matching structure, thereby ensuring the stability of the directional movement of the directional wheel in the riding state.

[0060] It should be noted that the terms "first, second, third and fourth" in the present application are only used for descriptive purposes and do not indicate any order. They cannot be understood as indicating or implying relative importance. These terms can be interpreted as names.

[0061] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. Multifunctional luggage, characterized in that: It comprises a mother box and a sub-box, wherein the sub-box is hingedly arranged on the mother box, two front universal wheels are arranged at one end of the bottom of the mother box away from the sub-box, and the two front universal wheels are symmetrical with the horizontal central axis of the bottom of the mother box, a support seat is arranged at the bottom of the mother box and at one end close to the sub-box, and the support seat moves relative to the mother box, and two rear universal wheels are arranged at the bottom of the support seat, and the two rear universal wheels are symmetrical with the horizontal central axis of the bottom of the mother box; The multifunctional suitcase has a riding state and a storage state; wherein, in the riding state, the sub-box body is flipped downward and abutted against the lower part of the main box body, and the bottom of the sub-box body abuts against the support seat, wherein, in the storage state, the sub-box body is flipped upward and abutted against the upper part of the main box body.

2. The multifunctional suitcase according to claim 1, characterized in that: A control button is provided on the support seat, and two guide rods are provided at one end of the support seat close to the mother box body. The two guide rods are symmetrical with the horizontal central axis of the bottom of the mother box body, and are respectively vertically connected to the two ends of the control button. The mother box body is provided with a guide sleeve that slides with the guide rod, and the guide rod is connected to a locking structure, and the locking structure is configured as: when the control button is pressed, the guide rod and the guide sleeve can be unlocked, so that the support seat can be moved in a directional manner relative to the mother box body; when the control button is released, the guide rod and the guide sleeve can be locked.

3. The multifunctional suitcase according to claim 2, characterized in that: The locking structure comprises a return spring, two locking rods and a cavity for placing the control button and the return spring, a pressing protrusion is provided at one end of the control button away from the mother box body, the pressing protrusion passes through the outer wall of the cavity, the return spring is connected between the control button and the inner wall of the cavity, the two locking rods are coaxially embedded in the two guide rods, and are gap-matched with the guide rods, the outer ends of the two locking rods are respectively vertically connected to the two ends of the control button, the inner end of the locking rod is symmetrically provided with two limiting grooves along the radial direction, a locking block is connected in the limiting groove in a hinged manner, and the guide rod is provided with a avoiding hole matching with the locking block; When the control button is pressed, the locking rod moves inward and drives the locking block to rotate through the limiting groove and away from the guide sleeve, thereby unlocking the guide rod and the guide sleeve; when the control button is released, the locking rod moves outward and drives the locking block to rotate through the limiting groove and pass through the avoidance hole to abut against the inner wall of the guide sleeve, thereby locking the guide rod and the guide sleeve.

4. The multifunctional suitcase according to claim 3, characterized in that: The locking block is a wedge-shaped block, including a rotating middle part and a hinged part and a locking part extending from the rotating middle part at a predetermined angle. The rotating middle part is vertically connected to the guide rod through a rotating shaft, the hinged part is hinged in the limit groove, the locking part is close to the side walls of the guide rod and the guide sleeve, and the avoidance hole extends along the axial direction of the guide rod.

5. The multifunctional suitcase according to claim 1, characterized in that: A notch suitable for storing the sub-box is arranged on the upper part of the main box, and the outer contour of the sub-box matches the contour of the notch.

6. The multifunctional suitcase according to claim 1, characterized in that: A guide rod is symmetrically installed on the side wall of the support seat close to the mother box body, and a plurality of limit protrusions are arranged on the surface of the guide rod at intervals along the axial direction. The mother box body is provided with a guide hole that slides with the guide rod, and a limit groove or a limit hole that cooperates with the limit protrusion is provided in the guide hole.

7. The multifunctional suitcase according to claim 1, characterized in that: The top of the support seat is vertically connected with a directional moving block through a first return spring. When the sub-box abuts against the support seat in the riding state, the directional moving block faces the sub-box. The directional moving block is in an isosceles trapezoidal shape, and the large end of the directional moving block is located at the top. The two oblique side surfaces of the directional moving block face the two rear universal wheels respectively. The support seat is symmetrically connected to limit rods on both sides of the directional moving block, and the limit rod is coaxially connected to an end of the limit rod close to the directional moving block, and a second return spring is sleeved on the limit rod. A guide channel that matches the clearance of the limit rod is provided in the support seat in the horizontal direction, and a limit channel is coaxially provided at the inner side end of the guide channel, the inner diameter of the limit channel is larger than the inner diameter of the guide channel, and the limit channel matches the clearance of the end, the second return spring is located in the limit channel, and the end and the bottom wall of the limit channel are respectively connected at both ends; The support seat is connected to the rear universal wheel via a wheel rod, and the inner side surface of the wheel rod is provided with a limiting space matched with the limiting rod.

8. The multifunctional suitcase according to claim 7, characterized in that: The directional moving block is provided with a guide groove matched with the end head on the inclined side surface, and the guide groove extends along the height direction.

9. The multifunctional suitcase according to claim 8, characterized in that: The top of the end head is a spherical structure.

10. The multifunctional suitcase according to claim 7, characterized in that: An end of the limiting rod close to the rear universal wheel is connected with an arc-shaped limiting plate, and the limiting space is an arc-shaped groove that is engaged with the arc-shaped limiting plate.

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