An electrically powered luggage case

Abstract

The utility model provides a kind of electric suitcase, comprising: box, the bottom of box is equipped with rear wheel, rear wheel is power wheel;Telescopic mechanism, it is set on box, including telescopic link and electric push rod;Steering assembly, including the front wheel pedestal of being set in telescopic link front end, the handlebar assembly of being set in front wheel pedestal upper end and the front wheel of being set in front wheel pedestal lower end and being connected with handlebar assembly;Front wheel is equipped with the switch button for switching it between universal wheel state and directional wheel state;When steering assembly resets to back and switch button contacts with box, front wheel switches to universal wheel state;When steering assembly moves to front and switch button is separated from box, front wheel switches to directional wheel state and can contain handlebar assembly control the steering of front wheel.The utility model electric suitcase, in the telescoping process of steering assembly before and after, can realize the automatic switching of front wheel between fixed wheel and universal wheel two modes, switching process does not need manually, greatly improves use experience.

Description

Technical Field

[0001] This utility model relates to an electric suitcase, and more particularly to an electric suitcase. Background Technology

[0002] With the improvement of people's living standards and the convenience of travel, electric suitcases are increasingly favored by travelers due to their labor-saving and convenient features. However, existing electric suitcases still have some shortcomings in actual use.

[0003] Currently, all existing electric suitcases use a fixed wheel structure with the pull rod located on the rear. They cannot be turned when pushed horizontally, and the suitcase cannot rotate on its own. When using the pull rod to pull the suitcase, the suitcase needs to be turned around to move it, resulting in a poor user experience and making it easy for the suitcase to tip over. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an electric luggage box that can flexibly switch between fixed wheels and omnidirectional wheels, with good steering flexibility and handling stability.

[0005] This utility model provides an electric suitcase, which includes: The box body 1 has a top that can be ridden, and the bottom of the box body 1 is equipped with a rear wheel 12, which is a drive wheel; The telescopic mechanism is provided on the housing 1 and includes a telescopic rod 13 that slides horizontally and extends and retracts forward and backward; The steering assembly includes a front wheel base 3 disposed at the front end of the telescopic rod 13, a handle assembly disposed at the upper end of the front wheel base 3, and a front wheel 4 disposed at the lower end of the front wheel base 3 and connected to the handle assembly; The front wheel 4 is provided with a switching button 43 for switching it between omnidirectional wheel mode and directional wheel mode; When the steering assembly is reset to its rearward position, the switching button contacts the housing and is pressed, and the front wheel switches to the swivel wheel state; When the steering assembly moves forward, the switching button 43 disengages from the housing 1, the front wheel 4 switches to a directional wheel state, and the handle assembly can control the steering of the front wheel 4.

[0006] Furthermore, the switching button 43 is positioned rearward, and when the handle assembly is in the centered state, the pressing direction of the switching button 43 is parallel to the movement direction of the telescopic rod 13.

[0007] Furthermore, the front wheel 4 includes an upper wheel seat 41 rotatably mounted on the front wheel base 3 and connected to the handle assembly, and a lower wheel seat 42 rotatably mounted on the lower end of the upper wheel seat 41. The rotation axes of the upper wheel seat 41 and the lower wheel seat 42 are parallel or coaxial and both perpendicular to the horizontal plane. The front wheel body 46 is eccentrically disposed on the lower wheel seat 42. The switching button 43 is horizontally slidably mounted on the upper wheel seat 41. The upper wheel seat 41 is provided with an elastic component 47 that causes the switching button 43 to have an outward movement tendency. The side wall of the switching button 43 is provided with a locking block 433. The lower wheel seat 42 is provided with a slot 4211 that allows the locking block 433 to be inserted and connected to the upper wheel seat 41.

[0008] Furthermore, the opening direction of the slot 4211 is perpendicular to the rotation axis of the front wheel body 46 and is located on the side close to the rotation axis of the front wheel body 46.

[0009] Furthermore, the bottom surface of the front wheel base 3 is provided with an upper wheel seat mounting hole 311 for accommodating the upper wheel seat 41, and the rear end of the upper wheel seat mounting hole 311 is provided with an opening 313 for the switching button 43 to pass through and provide it with swing space; the top surface or side wall of the upper wheel seat 41 is provided with a limiting protrusion 411, and the top surface or side wall of the upper wheel seat mounting hole 311 is provided with a limiting groove 312 for accommodating the limiting protrusion 411 and limiting the rotation of the upper wheel seat 41.

[0010] Furthermore, the top surface of the lower wheel seat 42 is provided with an annular receiving groove 4210, the annular receiving groove 4210 is coaxial with the rotation axis of the lower wheel seat 42, and the side wall of the annular receiving groove 4210 extends outward to form the slot 4211. When in the directional wheel state, the locking block 433 is located in the slot 4211; when in the universal wheel state, the locking block 433 is located in the annular receiving groove 4210.

[0011] Furthermore, the bottom surface of the upper wheel seat 41 is provided with an annular protrusion 413 that can be inserted into the annular receiving groove 4210 and rotate. The annular protrusion 413 is provided with a block receiving groove 4130, which is used to receive the block 433 in the universal wheel state and to support the elastic component.

[0012] Furthermore, the outer end face of the card block 433 is an arc-shaped surface and serves as the first working surface 433a. The axis of the first working surface 433a is coaxial with the rotation axis of the lower wheel seat 42, and the inner wall of the annular receiving groove 4210 serves as the second working surface.

[0013] Furthermore, when the switching button 43 is disengaged from the housing and the first working surface is in contact with the second working surface, the force generated by the steering assembly movement on the lower wheel seat 42 is greater than the force generated by the first working surface on the second working surface and can cause the lower wheel seat to deflect.

[0014] Furthermore, the first working surface 433a and / or the second working surface are made of a lubricating material or have a lubricating layer disposed on their surfaces.

[0015] Furthermore, a strip groove 415 is provided on the bottom surface of the upper wheel seat 41. The length direction of the strip groove 415 is perpendicular to and intersects the axis of the upper wheel seat 41. A sliding groove is formed between the strip groove 415 and the lower wheel seat 42. The switching button 43 is horizontally slidably fitted in the sliding groove.

[0016] Furthermore, a limiting groove 4150 is provided on one or both sides of the strip groove 415, the lower end of the limiting groove 4150 extends outside the strip groove 415, and a limiting protrusion 434 corresponding to the limiting groove 4150 is provided on the side wall of the switching button 43.

[0017] Furthermore, the switching button 43 includes a guide block 431, the outer end face of the guide block 431 is provided with a cylindrical body and forms a pressing part 432, and an outward first limiting surface is formed between the guide block 431 and the pressing part 432; the lower end of the guide block 431 is provided with a locking block 433, and the inner end face of the guide block 431 is provided with a spring hole for installing an elastic component.

[0018] Furthermore, the width of the card block 433 is smaller than the width of the guide block 431, and a downward-facing second limiting surface is formed between the two.

[0019] Furthermore, the inner end face of the card block 433 is flush with the inner end face of the guide block 431 and both are arc-shaped surfaces, and the arc-shaped surfaces are coaxial with the rotation axis of the lower wheel seat 42.

[0020] Furthermore, a steering seat 32 connected to the handle assembly is rotatably mounted on the front wheel base 3. A connecting plate 322 is provided on the side wall of the steering seat 32. A connecting rod 33 is hinged on the connecting plate 322. The two ends of the connecting rod 33 are connected to the front wheels 4 at both ends of the front wheel base 3 and can control the two front wheels 4 to rotate synchronously.

[0021] Furthermore, the bottom of the housing 1 is provided with a base receiving groove facing forward for accommodating the front wheel base 3, and the base receiving groove is provided with a trigger surface or trigger protrusion facing forward for contacting the switching button 43.

[0022] Furthermore, the handle assembly includes a handle bar that can extend and retract vertically and a handle body 23 disposed on the upper end of the handle bar. The handle bar is rotatably mounted on the front wheel base 3 and connected to the front wheel 4. The front end face of the housing 1 is provided with a first receiving groove 101 for accommodating the handle bar and a second receiving groove 102 for accommodating the handle body 23 and enabling the handle body 23 to automatically return to its original position.

[0023] Furthermore, the handle is provided with a decorative cover plate 14, which can cover the open end of the first receiving groove 101 when the telescopic rod 13 is in the retracted state.

[0024] This utility model of an electric suitcase features a rearward-facing switching button on the steering assembly. During the forward and backward extension of the steering assembly, the front wheels can automatically switch between fixed and swivel wheel modes without manual intervention. This enhances the suitcase's flexibility and stability in different usage scenarios, eliminating the need for additional manual adjustments and greatly improving the user experience. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the electric luggage box of this utility model; Figure 2 This is a schematic diagram of the electric luggage box of this utility model in the riding state; Figure 3 This is a schematic diagram of the steering assembly of the electric luggage box of this utility model; Figure 4 This is a schematic diagram showing the installation of the front wheel of the electric luggage box of this utility model; Figure 5 This is a schematic diagram of the front wheel base of the electric luggage box of this utility model; Figure 6 This is a cross-sectional view of the front wheel base of the electric luggage box of this utility model; Figure 7 This is a sectional view of the limiting structure of the electric luggage box of this utility model; Figure 8 This is a schematic diagram of the steering seat of the electric luggage box of this utility model; Figure 9 This is a schematic diagram of the front wheel of the electric luggage box of this utility model; Figure 10 This is a partial sectional view of the front wheel of the electric luggage box of this utility model; Figure 11 This is an exploded structural diagram of the electric luggage box of this utility model; Figure 12 This is a schematic diagram showing the installation of the switching button for the electric luggage case of this utility model; Figure 13This is a schematic diagram of the switching button of the electric luggage box of this utility model; Figure 14 This is a cross-sectional view of the front wheel of the electric luggage box of this utility model; Figure 15 A diagram showing the location of the toggle button when in directional mode; Figure 16 A lateral cross-sectional view of the front wheel in directional mode; Figure 17 A diagram showing the location of the toggle button in omnidirectional mode; Figure 18 This is a lateral cross-sectional view of the front wheel in omnidirectional mode.

[0026] In the diagram: 1. Housing; 101. First receiving slot; 102. Second receiving slot; 11. Telescopic rod; 12. Rear wheel; 13. Telescopic rod; 14. Decorative cover; 2. Handle assembly; 21. Handle handle; 23. Handle body; 3. Front wheel base; 31. Front wheel base body; 311. Upper wheel seat mounting hole; 3110. Shaft hole; 312. Limiting groove; 313. Opening; 32. Steering seat; 322. Connecting plate; 324. Bearing; 33. Connecting... 4. Rod, 4. Front wheel, 41. Upper wheel seat, 411. Limiting protrusion, 413. Annular protrusion, 4130. Block receiving groove, 415. Strip groove, 4150. Limiting groove, 42. Lower wheel seat, 43. Switching button, 433. Block, 4210. Annular receiving groove, 4211. Slot, 433a. First working surface, 431. Guide block, 432. Pressing part, 434. Limiting protrusion, 44. Main shaft, 46. Front wheel body, 47. Elastic component. Detailed Implementation

[0027] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] See Figures 1-18 This utility model provides an electric luggage box that can switch the front wheel to a swivel wheel state when pulled (pushed) by hand, and switch the front wheel to a fixed wheel state when riding to steer.

[0029] It includes the housing 1, the telescopic mechanism, and the steering assembly.

[0030] The top of the box 1 is for riding, and a rear wheel 12 is provided at the bottom of the box 1. In this embodiment, the rear wheel 12 serves as the drive wheel. A telescopic mechanism is provided on the box 1, including a telescopic rod 13 that slides horizontally and extends and retracts forward and backward, and an electric push rod (not shown in the figure) for driving the telescopic rod 13 to extend and retract forward and backward. A steering assembly is provided at the front end of the telescopic rod 13 and can move forward and backward with the telescopic rod 13. It includes a front wheel base 3, a handlebar assembly 2, and a front wheel 4. The front wheel base 3 is fixed to the front end of the telescopic rod 13, the handlebar assembly is provided at the upper end of the front wheel base 3, and the front wheel 4 is provided at the lower end of the front wheel base 3 and connected to the handlebar assembly for steering in riding mode.

[0031] In this application, a switching button 43 is provided on the front wheel 4. The switching button 43 is used to switch the front wheel 4 between a swivel wheel state and a fixed wheel state, and the switching button 43 is set to the rear. When the steering assembly is reset to the rear and the switching button 43 is in contact with the case 1, that is, when the switching button is pressed, the front wheel 4 switches to the swivel wheel state. At this time, the suitcase can be pushed. When the steering assembly moves forward and the switching button 43 is disengaged from the case 1, that is, when the switching button is released, the front wheel 4 switches to the fixed wheel state. At this time, it can be ridden, and the handle assembly can control the front wheel 4 to achieve steering.

[0032] The front wheel in this application switches between directional and omnidirectional modes, balancing controllable steering during riding and flexible steering during pushing. The state switching is mechanically linked, requiring no manual intervention. The front wheel state is automatically controlled by the forward and backward movement of the telescopic rod and the contact or disengagement of the switching button 43 with the housing 1. When the button is pressed by the housing, the front wheel switches to omnidirectional mode, allowing for direct pushing without additional operation. When the button is disengaged from the housing, the front wheel automatically switches to directional mode, and the handlebar assembly takes over steering, allowing for immediate riding. This avoids the cumbersome steps of manual mode switching, reduces operational errors, and improves usability. The switching button requires contact and pressing with the housing to trigger the omnidirectional wheel mode, avoiding… Accidental button presses during riding can cause sudden changes in the front wheel's state. The triggering conditions of the switching mechanism are naturally mapped to the usage scenario. The backward movement when pushing and the forward extension trend when riding are intuitive and intuitive, allowing the function switch to be completed unconsciously. The mechanical linkage structure is stable and reliable, requiring no additional power supply or complex control modules, which reduces the system failure rate and enhances the product's durability. The mechanical linkage between the switching button and the forward and backward movement of the telescopic rod 13 eliminates the need for manual mode switching, achieving a seamless switching experience and avoiding operational errors such as forgetting to switch or not switching properly. It is especially suitable for complex scenarios such as being in a hurry or carrying items with both hands, providing a good user experience.

[0033] In this application, when the handlebar assembly is in the centered position, the pressing direction of the switching button 43 is parallel to the movement direction of the telescopic rod 13. At this time, the switching button can be fully triggered, switching the riding mode to the pushing mode. When the telescopic rod returns to its original position, the contact between the housing and the switching button is a frontal vertical press, maximizing the contact area and ensuring that the pressing force is transmitted axially without loss. This ensures that the button is fully pressed into place, thereby reliably triggering the front wheel to switch from a fixed wheel to a swivel wheel. If there is an angle between the pressing direction and the movement direction of the telescopic rod, it may cause uneven force on the button and insufficient travel, resulting in incomplete switching or false triggering. This ensures the stability and reliability of the switching button in the pressing state, avoiding poor contact or jamming caused by angular deviation, and further improving the accuracy and durability of mode switching.

[0034] The structure of front wheel 4 is described in detail below: The front wheel 4 includes an upper wheel seat 41 and a lower wheel seat 42. The upper wheel seat 41 is rotatably mounted on the front wheel base 3 and is connected to the handle assembly, meaning the handle assembly can drive the upper wheel seat 41 to rotate. The lower wheel seat 42 is rotatably mounted on the lower end of the upper wheel seat 41, and the rotation axes of the upper wheel seat 41 and the lower wheel seat 42 are parallel or coaxial, both perpendicular to the horizontal plane. In this embodiment, the rotation axes of the upper wheel seat 41 and the lower wheel seat 42 are coaxial, and a main shaft 44 is provided between them. The front wheel body 46 is eccentrically mounted on the lower wheel seat 42, meaning the rotation axis 48 of the front wheel body 46 and the rotation axis of the lower wheel seat 42 are located in different planes. There is a certain distance between them so that they can rotate horizontally, i.e., deflect, when in the omnidirectional wheel state; the switch button 43 is horizontally slidably mounted on the upper wheel seat 41. At the same time, an elastic component 47 is provided on the upper wheel seat 41. The elastic component 47 is a compression spring, which makes the switch button 43 have an outward movement tendency. The side wall of the switch button 43 is provided with a locking block 433. In this embodiment, the locking block 433 is located at the lower end of the switch button 43. At the same time, a locking groove 4211 is provided on the lower wheel seat 42. The locking groove 4211 can accommodate the locking block 433, thereby realizing the connection between the lower wheel seat 42 and the upper wheel seat 41, so that the upper wheel seat 41 can drive the lower wheel seat 42 to rotate synchronously.

[0035] In directional wheel mode, i.e., riding mode, the switch button pops outward under the action of the elastic component, and the locking block 433 engages with the slot 4211 of the lower wheel seat, achieving a rigid connection between the upper wheel seat 41 and the lower wheel seat 42. At this time, when the handlebar assembly drives the upper wheel seat to rotate, the lower wheel seat rotates synchronously, and the front wheel body 46 steers precisely with the steering command, without delay or slippage, ensuring steering controllability during riding. In omnidirectional wheel mode, i.e., push mode, after the switch button is pressed, the locking block 433 disengages from the slot 4211, and the lower wheel seat 42 separates from the upper wheel seat 41, allowing it to rotate independently around the main shaft. At this time, the front wheel body can freely deflect through the eccentric design, allowing for flexible 360° steering during pushing without the need for manual direction adjustment, facilitating the flexible pushing of luggage. Employing a purely mechanical locking method using compression springs, blocks, and slots, it eliminates the need for electronic components such as motors and sensors, is unaffected by environmental factors, and has a much lower failure rate than electronically controlled switching structures. Even if the elastic components age, only the spring needs to be replaced to restore functionality, resulting in low manufacturing and maintenance costs. The elastic components keep the switching button in a pop-up locked state by default, meaning the front wheel defaults to directional wheel mode. It only unlocks to omnidirectional wheel mode when the telescopic rod moves backward or the button is forcibly pressed by the housing. This prevents accidental switching from directional to omnidirectional due to bumps or accidental activation during riding, improving safety and reliability.

[0036] In order to achieve automatic state switching, in this application, the opening direction of the slot 4211 is perpendicular to the rotation axis of the front wheel body 46, and the slot is located on the side close to the rotation axis of the front wheel body 46. When the omnidirectional wheel rotates into the directional wheel, the omnidirectional wheel deflects backward during the forward movement of the steering assembly, thereby enabling the slot and the block to automatically align. As the steering assembly continues to move forward, the block is inserted into the slot under the action of the elastic component, completing the automatic locking of the directional wheel state. The structure is compact, and mode switching can be achieved without an additional drive mechanism. The structure is simple, with low complexity and manufacturing cost, and good stability in use.

[0037] In this application, an upper wheel seat mounting hole 311 is provided on the bottom surface of the front wheel base 3 to accommodate and install the upper wheel seat 41. The cross-section of the upper wheel seat 41 is circular, and the cross-section of the upper wheel seat mounting hole is also circular. A recessed hole and a shaft hole 3110 are provided on the axis of the upper wheel seat mounting hole 311 to realize the rotatable connection of the upper wheel seat on the front wheel base 3. An opening 313 is provided at the rear end of the upper wheel seat mounting hole 311. The opening can accommodate the switching button 43 to pass through and provide a switching button... Button 43 provides swing space; a limiting protrusion 411 is provided on the top surface or side wall of the upper wheel seat 41, and a limiting groove 312 corresponding to the limiting protrusion 411 is provided on the top surface or side wall of the mounting hole 311 of the upper wheel seat. The limiting groove 312 can accommodate the limiting protrusion 411 and realize rotational limitation of the upper wheel seat 41; in this embodiment, the limiting protrusion is provided on the top surface of the upper wheel seat 41, and it is fan-shaped, so that the turning angle of the upper wheel seat 41 is less than or equal to ±45 degrees. Both the upper wheel seat 41 and the upper wheel seat mounting hole 311 have circular cross-sections. Together with the positioning structure of the concave hole and the shaft hole 3110, they form a precision shaft hole fit, which makes the axis of the upper wheel seat fixed and without eccentric offset when rotating. This avoids steering jamming or play in the directional wheel mode, ensures accurate transmission of steering commands, and improves the installation stability and reliability of the front wheel. The opening 313 accommodates the switching button 43 and provides swing space so that the switching button will not interfere with the front wheel base when the upper wheel seat rotates. It also enables the hidden design of the switching button, improving the overall aesthetics and structural compactness and preventing accidental activation.

[0038] Specifically, an annular receiving groove 4210 is provided on the top surface of the lower wheel seat 42. The annular receiving groove is circular and coaxial with the rotation axis of the lower wheel seat 42. The side wall of the annular receiving groove 4210 extends outward to form a slot 4211. When in the directional wheel state, the locking block 433 is located in the slot 4211; when in the universal wheel state, the locking block 433 is located in the annular receiving groove 4210. The annular receiving groove is coaxial with the rotation axis of the lower wheel seat. When the locking block 433 exits the slot 4211, the locking block falls into the annular receiving groove as a whole. At this time, the lower wheel seat can rotate freely around the main shaft, and the locking block moves synchronously with the lower wheel seat in the annular groove without any mechanical obstruction, ensuring that the front wheel body can smoothly deflect 360° in the universal wheel mode, and the turning radius is close to zero when pushed. Its structure is compact, easy to manufacture, and has high structural strength.

[0039] To improve the rotational stability of the lower wheel seat 42, this application provides an annular protrusion 413 on the bottom surface of the upper wheel seat 41. This annular protrusion can be inserted into the annular receiving groove 4210 and rotate. At the same time, a locking block receiving groove 4130 is provided on the annular protrusion 413. The locking block receiving groove 4130 is used to receive the locking block 433 in the universal wheel state and to support the elastic component. The annular protrusion 413 is inserted into the annular receiving groove 4210 of the lower wheel seat to form a nested structure of shaft and hole, which forces the upper wheel seat and the lower wheel seat to rotate around the same axis, eliminating the eccentric shaking caused by machining errors or assembly gaps. In the universal wheel mode, when the lower wheel seat rotates freely around the main shaft, the cooperation between the annular protrusion and the annular groove is equivalent to a sliding bearing, which restricts radial displacement and avoids the swaying phenomenon caused by the eccentric design of the front wheel body. It can improve the connection reliability and movement smoothness between the lower wheel seat and the upper wheel seat and avoid the shaking or looseness.

[0040] In this embodiment, the outer end face of the locking block 433 is an arc-shaped surface, which serves as the first working surface 433a. The axis of the first working surface 433a is coaxial with the rotation axis of the lower wheel seat 42, while the inner wall of the annular receiving groove 4210 serves as the second working surface. When the switching button 43 disengages from the housing and the first working surface contacts the second working surface, the switching button is released, and the front wheel body rotates to the switching state. At this time, the locking block and the slot are not aligned. When the steering assembly moves, the force generated by the bottom surface on the lower wheel seat 42 is greater than the force generated by the first working surface on the second working surface. At this time, the forward movement of the front wheel can cause the front wheel body to deflect backward, so that the slot can automatically align with the locking block. On the one hand, this can increase the thickness of the locking block within the effective space, improve the connection strength, and on the other hand... On the one hand, as a guide surface for the relative rotation of the card block and the card block receiving groove, the contact area between the two is increased, the force per unit area is reduced, and the wear resistance and structural durability are improved. This allows the switching button to automatically return to center under the action of ground friction when it is disengaged from the housing and the front wheel body is not centered. In order to reduce the friction in this state, that is, the friction between the card block and the annular receiving groove in the elastic component, in this embodiment, the first working surface 433a or the second working surface is made of lubricating material, or a lubricating layer is provided on the surface of the working surface or the second working surface to reduce the friction generated by the relative rotation when the two are in contact, reduce the rotational damping of the front wheel body in the switching state, realize the rapid return of the front wheel body, and thus make the card slot automatically align with the card block to realize the switching to the directional wheel.

[0041] In this application, a strip groove 415 is provided on the bottom surface of the upper wheel seat 41. The length direction of the strip groove 415 is perpendicular to and intersects the axis of the upper wheel seat 41. The strip groove 415 and the lower wheel seat 42 form a sliding groove. The switching button 43 is horizontally slidably fitted in the sliding groove. Therefore, the axis of the switching button 43 is perpendicular to and intersects the rotation axis of the upper wheel seat. The length direction of the strip groove is perpendicular to the rotation axis of the upper wheel seat. It cooperates with the lower wheel seat to form a straight sliding groove, which forces the switching button 43 to slide only in the horizontal direction perpendicular to the rotation axis. This avoids radial offset caused by processing errors or vibration, ensures that the sliding stroke of the switching button corresponds precisely to the axial movement of the locking block 433, and has no stroke play, thus improving the reliability of mode switching. Moreover, the structure is compact and easy to assemble and maintain. A limiting groove 4150 is provided on one or both sides of the strip groove 415, and the lower end of the limiting groove 4150 extends outside the strip groove 415. At the same time, a limiting protrusion 434 corresponding to the limiting groove 4150 is provided on the side wall of the switching button 43. The limiting protrusion has the functions of limiting and guiding, restricting the range of motion of the switching button in the slide groove, preventing it from sliding out or excessive displacement, especially the inward movement stroke. At the same time, it can prevent the switching button from deflecting vertically at both ends when moving horizontally, thus improving the smoothness of sliding.

[0042] The switching button 43 in this embodiment includes a guide block 431. Preferably, the cross-section of the guide block is rectangular. The outer end face of the guide block 431 (facing away from the axis of the lower wheel seat) is provided with a cylindrical body. The cylindrical body is horizontal and basically coaxial with the guide block 431, forming a pressing part 432. Its end is used to contact the housing and trigger. A first limiting surface facing outward is formed between the guide block 431 and the pressing part 432, which is used to limit the outer stroke of the switching button. The lower end of the guide block 431 is provided with a locking block 433. The inner end face of the guide block 431 is provided with a spring hole for installing an elastic component. The spring hole is a blind hole for installing an elastic component, i.e., a compression spring. Its structure is compact, which facilitates the positioning and pre-compression of the spring during assembly, avoids the elastic component from shifting or failing during operation, and ensures that the switching button can be stably reset after being triggered. The width of the locking block 433 is smaller than the width of the guide block 431, forming a downward-facing second limiting surface between them. Essentially, this creates a stepped limiting structure through the difference in structural dimensions, providing the locking block with a hard constraint in the vertical direction and an assembly positioning reference, improving the locking block's positional accuracy in the vertical direction and enhancing operational reliability and stability. In this application, the inner end face of the locking block 433 is flush with the inner end face of the guide block 431, and both are arc-shaped surfaces. The arc-shaped surfaces are coaxial with the rotation axis of the lower wheel seat 42, using a curved contour to adapt to the limited space. This maximizes the pressing depth within the limited installation space, allowing for an increase in the locking block thickness to improve connection strength, while ensuring no interference during movement and no loss in force transmission.

[0043] In this application, the front wheel base 3 is a strip structure, the length of which is parallel to the thickness direction of the housing 1 and the length is close to the thickness of the housing 1. A front wheel 4 is provided at both ends of the front wheel base 3. The front wheel base 3 includes a front wheel base body 31 with an open upper end and a cover provided on the front wheel base body 31. A steering seat 32 is rotatably installed in the front wheel base body 31 through a bearing 324. The steering seat is connected to the handle assembly. A connecting plate 322 is provided on the side wall of the steering seat 32. A connecting rod 33 is hinged on the connecting plate 322. The two ends of the connecting rod 33 are hinged to the two front wheels 4 at both ends and can control the two front wheels 4 to rotate synchronously.

[0044] A forward-facing base receiving groove is provided at the bottom of the box body 1 to accommodate the front wheel base 3 when it is folded up (pushed). A forward-facing trigger surface or trigger protrusion is provided in the base receiving groove for contact with the switching button 43. To improve the aesthetics of the structure and avoid accidental activation, the switching button does not protrude from the front wheel base. Correspondingly, a trigger protrusion is provided in the base receiving groove for pressing and triggering the switching button. The base receiving groove is a strip-shaped groove with a forward opening. When the front wheel base 3 is folded up, it can be completely embedded in the groove, so that the top and sides of the front wheel base are flush with the bottom of the box body 1, making the bottom of the box body visually flat and uniform, eliminating the abruptness. The depth of the receiving groove matches the front wheel base, which can completely cover the front wheel base without occupying extra space outside the box body, ensuring that the overall size of the suitcase meets the portability standard.

[0045] The handle assembly includes a handle bar 21 capable of vertical extension and retraction, and a handle body 23 disposed on the upper end of the handle bar 21. The handle bar is rotatably mounted on the front wheel base 3 and connected to the front wheel 4. A first receiving groove 101 and a second receiving groove 102 are provided on the front end face of the housing 1. The first receiving groove is a vertical strip groove for accommodating the handle bar, and the second receiving groove 102 is a horizontal strip groove for accommodating the handle body 23. The second receiving groove 102 communicates with the first receiving groove. Simultaneously, when the handle body is located within the second receiving groove 102, the rear end face of the second receiving groove is close to or just in contact with the side wall of the handle body 23. When switched to the swivel wheel state and the handle body 23 is not in the return-to-center state, i.e., when the handle body is tilted, the handle body 23 is in contact with the handle body 23. During the backward movement of the moving component, the rearmost end of the handle body 23 contacts the rear end face of the second receiving groove 102, pushing the handle body 23 to rotate. This rotation causes the handle body 23 to rotate in the returning direction, thereby driving the front wheel at the bottom to return to center, aligning the trigger end of the switching button with the trigger surface or trigger protrusion of the housing. Simultaneously, the upper end of the second receiving groove can also be open, facilitating the pulling up of the handle body for pushing in the folded state. A telescopic pull rod 11 is provided on one side of the housing's width for operation in the pushing state. The first and second receiving groove structures, in the folded state (i.e., the pushing state), completely conceal the handle component inside the housing, resulting in a clean and streamlined overall appearance with no exposed parts, effectively improving structural compactness and aesthetics. Furthermore, the open design of the receiving groove allows users to easily pull up the handle with one hand, enhancing ease of use. Additionally, the open front end of the second receiving groove automatically returns the handle body to center during the folding process, ensuring precise alignment of the lower switching button with the trigger protrusion, guaranteeing automatic state switching. To further enhance the aesthetics, a decorative cover plate 14 is provided on the handle bar. When the telescopic rod 13 is in the retracted state, that is, when the handle bar is located in the first receiving groove, the decorative cover plate 14 can cover the open end of the first receiving groove 101.

[0046] This application achieves convenient switching between fixed wheel and swivel wheel modes through the above structural design. The switching process does not require manual adjustment of the wheel assembly structure. Simply operating the telescopic lever can trigger the automatic return and switching mechanism, improving the flexibility and stability of the suitcase in different usage scenarios. No additional manual adjustment is required, greatly enhancing the user experience.

[0047] The following describes the working method of this application, including the switching between riding and pushing modes; The process of switching between riding modes includes the following steps: S11. The telescopic rod 13 is extended forward by the electric push rod, which in turn drives the steering assembly to move forward. S12. During the forward movement of the steering assembly, the front wheel body 46 deflects in the opposite direction of forward movement, that is, it shifts backward under the action of ground friction, so that the opening direction of the slot 4211 is aligned with the block 433, so that the slot 4211 is located on the insertion path of the block 433. At the same time, during the forward movement of the steering assembly, the distance between the end of the switching button 43 and the trigger surface or trigger protrusion on the housing 1 increases. Under the action of the elastic component, the switching button 43 moves outward, causing the locking block on the switching button 43 to move backward and enter the locking slot 4211. At this time, the lower wheel seat 42 cannot rotate relative to the upper wheel seat 41, causing the front wheel 4 to switch to the directional wheel state. When the switching button 43 is disengaged from the trigger surface or trigger protrusion on the housing, and the locking block 433 is not inserted into the slot 4211, that is, when the front wheel body is in the return-to-center state after disengagement, the first working surface of the outer end face of the locking block 433 contacts the outer wall of the annular groove of the lower wheel seat 42. During the forward movement of the steering assembly, the deflection of the ground on the lower wheel seat 42 is greater than the resistance of the first working surface on the second working surface, causing the lower wheel seat 42 to deflect and the slot to be located on the insertion path of the locking block. S13. When in the directional wheel state, the handlebar assembly can drive the upper wheel seat 41 to rotate, which in turn drives the lower wheel seat 42 to rotate synchronously, thereby turning the front wheel body on the lower wheel seat 42. At this time, riding is possible.

[0048] The transition to the implementation status includes the following steps: S21, Return handle assembly, so that the switch button 43 faces the trigger surface or trigger protrusion on the housing; When the handle assembly is not in the centered position, the tilted handle body can contact the rear end of the second receiving groove and automatically return to the centered position as the steering assembly moves backward, so that the switching button faces the trigger surface or trigger protrusion. Specifically, when the handle body is tilted, during the rearward movement of the rotating assembly, the rear end of the handle body first contacts the rear end surface of the second receiving groove and pushes the handle body to rotate, so that the handle body rotates in the centered direction, thereby driving the front wheel at the bottom to return to the centered position, so that the trigger end of the switching button faces the trigger surface or trigger protrusion of the housing. S22. The telescopic rod 13 is retracted backward by the electric push rod, which in turn moves the steering assembly backward. S23. When the steering assembly moves to the near-reset state, the end of the switching button 43 contacts the trigger surface or trigger protrusion on the housing 1 and pushes the switching button 43 forward relative to the steering assembly, causing the locking block on the switching button 43 to move inward, so that the locking block gradually moves out of the slot 4211. S24. When the steering assembly is moved to the reset state, the locking block is completely removed from the locking slot 4211. At this time, the lower wheel seat 42 can rotate freely relative to the upper wheel seat 41, so that the front wheel 4 switches to the universal wheel state. At this time, it can be pushed.

[0049] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An electric suitcase, characterized in that, include: The box has a top that allows for riding, and a rear wheel at the bottom of the box, which is a drive wheel; The telescopic mechanism, mounted on the housing, includes a telescopic rod that slides horizontally and extends and retracts forward and backward, and an electric push rod for driving the telescopic rod to move. The steering assembly includes a front wheel base disposed at the front end of the telescopic rod, a handle assembly disposed at the upper end of the front wheel base, and a front wheel disposed at the lower end of the front wheel base and connected to the handle assembly; The front wheel is equipped with a switch button for switching between omnidirectional wheel mode and directional wheel mode; When the steering assembly is reset to its rearward position, the switching button contacts the housing and is pressed, and the front wheel switches to the swivel wheel state; When the steering assembly moves forward, the switching button disengages from the housing, the front wheel switches to a directional wheel state, and the handle assembly can control the steering of the front wheel.

2. The electric suitcase as described in claim 1, characterized in that: The switching button is positioned rearward, and when the handle assembly is in the centered position, the pressing direction of the switching button is parallel to the movement direction of the telescopic rod.

3. The electric suitcase as described in claim 1, characterized in that: The front wheel includes an upper wheel seat rotatably mounted on the front wheel base and connected to the handle assembly, and a lower wheel seat rotatably mounted on the lower end of the upper wheel seat. The rotation axes of the upper wheel seat and the lower wheel seat are parallel or coaxial and both perpendicular to the horizontal plane. The front wheel body is eccentrically disposed on the lower wheel seat. The switching button is horizontally slidably mounted on the upper wheel seat. The upper wheel seat is provided with an elastic component that gives the switching button an outward movement tendency. The side wall of the switching button is provided with a locking block. The lower wheel seat is provided with a slot that allows the locking block to be inserted and connected to the upper wheel seat.

4. The electric suitcase as described in claim 3, characterized in that: The opening of the slot is perpendicular to the rotation axis of the front wheel body and is located on the side close to the rotation axis of the front wheel body.

5. The electric suitcase as described in claim 3, characterized in that: The bottom surface of the front wheel base is provided with an upper wheel seat mounting hole for accommodating the upper wheel seat. The rear end of the upper wheel seat mounting hole is provided with an opening for the switching button to pass through and for providing swing space. The top surface or side wall of the upper wheel seat is provided with a limiting protrusion, and the top surface or side wall of the upper wheel seat mounting hole is provided with a limiting groove for accommodating the limiting protrusion and for limiting the rotation of the upper wheel seat.

6. The electric suitcase as described in claim 3, characterized in that: The top surface of the lower wheel seat is provided with an annular receiving groove, which is coaxial with the rotation axis of the lower wheel seat. The side wall of the annular receiving groove extends outward to form the locking groove. When the wheel is in the directional wheel state, the locking block is located in the locking groove; when the wheel is in the universal wheel state, the locking block is located in the annular receiving groove.

7. The electric suitcase as described in claim 6, characterized in that: The bottom surface of the upper wheel seat is provided with an annular protrusion that can be inserted into the annular receiving groove and rotate. The annular protrusion is provided with a block receiving groove, which is used to accommodate the block in the universal wheel state and to support the elastic component.

8. The electric suitcase as described in claim 6, characterized in that: The outer end face of the card block is an arc-shaped surface and serves as the first working surface. The axis of the first working surface is coaxial with the rotation axis of the lower wheel seat. The inner wall of the annular receiving groove serves as the second working surface. When the switching button is disengaged from the housing and the first working surface contacts the second working surface, the force generated by the movement of the steering assembly on the lower wheel seat is greater than the force generated by the first working surface on the second working surface and can cause the lower wheel seat to deflect.

9. The electric suitcase as described in claim 1, characterized in that: The bottom of the housing has a base receiving groove facing forward for accommodating the front wheel base. The base receiving groove has a trigger surface or trigger protrusion facing forward for contacting the switching button.

10. The electric suitcase as described in claim 1, characterized in that: The handle assembly includes a handle bar that can extend and retract vertically and a handle body disposed at the upper end of the handle bar. The handle bar is rotatably mounted on the front wheel base and connected to the front wheel. The front end face of the housing is provided with a first receiving groove for accommodating the handle bar and a second receiving groove for accommodating the handle body and enabling the handle body to automatically return to its original position.

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