Hidden wheel type luggage case

Abstract

The utility model relates to the technical field of luggage cases, and discloses a hidden wheel type luggage case which comprises a case body and four electric telescopic trundle structures, and trundle storage chambers which are sunken towards an inner cavity of the case body are arranged at all corners of the bottom of the case body. The electric telescopic trundle structure comprises a guide rail vertically fixed to the inner wall of the trundle containing chamber, a guide sliding block arranged on the guide rail in a sliding mode, a sleeve clamped by the guide sliding block, a trundle module arranged at the bottom end of the sleeve, a transmission rod extending in the vertical direction and a driving structure used for driving the transmission rod to rotate, and the transmission rod is in threaded connection with the sleeve. According to the hidden wheel type luggage case, complex linkage parts are omitted, the electric telescopic trundle structure is adopted, the overall structure is simple, the available space in the luggage case is increased, and a user can store luggage and articles more conveniently; and the extension or retraction operation of the trundle module can be easily realized only by pressing a control button outside the luggage case.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of luggage, especially relates to a hidden wheel type luggage. BACKGROUND

[0002] In actual transportation scenarios, especially in the luggage consignment link, the handling personnel often have to use rough operation methods such as dragging and throwing. The exposed casters are extremely vulnerable to severe impacts in this case, which causes their stability to be damaged, and the casters frequently fall off. This not only brings great inconvenience to the subsequent use of the luggage by the user, increases the cost and time consumption of additional maintenance or replacement of the casters, but also may cause the luggage to lose the normal moving function due to the damage of the casters during transportation, affecting the entire travel arrangement.

[0003] Although the patent (CN210124390U) provides a pull rod-caster linkage structure of a luggage, when the user needs to use the luggage, the user pulls the movable pull rod, drives the casters to extend out of the luggage shell under the transmission of the linkage structure, so as to facilitate the transportation of the luggage; and when the user does not need to use the luggage, the user pushes the pull rod into the luggage shell, which also causes the casters to be stored in the luggage shell, thereby protecting the casters. However, this linkage structure is complex in structure, large in occupied space, and laborious to operate. There is an urgent need to develop a new hidden wheel type luggage. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a hidden wheel type luggage which is simple in structure, small in occupied space, and labor-saving in electric driving.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A hidden wheel type luggage includes a box body and four electric telescopic caster structures, each corner of the bottom of the box body is provided with a caster storage chamber recessed into the inner cavity of the box body, the electric telescopic caster structure includes a guide rail fixed vertically on the inner wall of the caster storage chamber, a guide slider slidingly arranged on the guide rail, a sleeve clamped by the guide slider, a caster module arranged at the bottom end of the sleeve, a transmission rod extending vertically, a driving structure for driving the transmission rod to rotate, the transmission rod is provided with external threads, the sleeve is provided with internal threads and is connected with the external threads of the transmission rod in a matched mode; the luggage is provided with a power supply and a controller for controlling all the electric telescopic caster structures, and the box body is provided with a control button for controlling all the caster modules to extend out of or retract into the caster storage chamber simultaneously.

[0007] As a further improvement to the above technical solution, the drive structure includes a support fixed in the caster storage chamber, a drive motor disposed downward in the support, a first gear disposed on the output end of the drive motor, and a second gear coaxially fixed to the top of the transmission rod. The second gear is rotatably connected to the bottom surface of the support, and the first gear meshes with the second gear for transmission.

[0008] As a further improvement to the above technical solution, a T-shaped groove is provided on the guide rail, and the guide slider includes a slider body with a mounting hole and a T-shaped body disposed on the side of the slider body, wherein the T-shaped body is slidably connected to the T-shaped groove.

[0009] As a further improvement to the above technical solution, the caster module includes a universal wheel, a screw, and a spring. A limiting block is fitted on the outer wall of the sleeve, and an inner ring is provided at the bottom end of the sleeve. The screw is inserted into the sleeve from top to bottom, and the stud of the screw passes through the inner ring and is fixed to the top of the universal wheel. The inner ring restricts the head of the screw from passing through. The spring is fitted around the sleeve and the screw, and the top end of the spring presses against the limiting block, while the bottom end of the spring presses against the universal wheel.

[0010] As a further improvement to the above technical solution, the top of the box is provided with a telescopic pull rod and a first handle, and the side of the box is provided with a second handle.

[0011] As a further improvement to the above technical solution, the adjustment button on the telescopic rod is linked with the control button.

[0012] The beneficial effects of this utility model are as follows: Compared with the prior art, the concealed-wheel suitcase provided by this utility model eliminates complex linkage components and adopts an electric telescopic caster structure, simplifying the overall structure. It eliminates the need for a large area and complex layout of linkage structure space inside the suitcase, increasing the usable space inside and making it easier for users to store luggage. The extension or retraction of the caster module can be easily achieved by pressing a control button on the outside of the suitcase, eliminating the need for laborious pulling of a lever as required by traditional linkage structures. This allows the elderly, children, and people with limited strength to easily and quickly operate the suitcase casters, improving the user experience. Attached Figure Description

[0013] Figure 1 A perspective view of the concealed wheel luggage provided by this utility model.

[0014] Figure 2 A perspective view of the electric telescopic caster structure provided by this utility model.

[0015] Figure 3The structure diagram of the electric telescopic trundle structure provided by the utility model shows that the dashed line in the drawing indicates that the component is arranged inside and cannot be directly seen from outside.

[0016] Figure 4 For Figure 3 The local enlarged view of the L area.

[0017] Figure 5 The schematic diagram of the internal structure of the box body of the hidden wheel type luggage case.

[0018] Main element symbol explanation: 1-box body, 11-trundle storage chamber, 2-electric telescopic trundle structure, 21-guide rail, 211-T-shaped sliding groove, 22-guiding sliding block, 221-sliding block main body, 222-T-shaped body, 23-sleeve, 231-inner ring, 24-trundle module, 241-universal wheel, 242-screw, 243-spring, 244-limiting block, 25-transmission rod, 26-driving structure, 261-stand, 262-driving motor, 263-first gear, 264-second gear, 31-telescopic pull rod, 311-adjusting button, 32-first handle, 33-second handle, 4-power supply, 5-controller. DETAILED DESCRIPTION

[0019] The utility model provides a kind of hidden wheel type luggage case, to make the purpose, technical scheme and effect of the utility model more clear, definite, the following referring to drawing and taking example to further detail the utility model of example.It should be understood that the specific embodiment described herein is only used to explain the utility model, and is not used to limit the protection scope of the utility model.

[0020] Please refer to Figures 1 to 4 The utility model provides a kind of hidden wheel type luggage case, including box body 1 and four electric telescopic trundle structures 2, each corner at the bottom of the box body 1 is equipped with the trundle storage chamber 11 recessed to the inner cavity of box body 1, the electric telescopic trundle structure 2 includes guide rail 21 vertically fixed on the inner wall of trundle storage chamber 11, guiding sliding block 22 is slidably arranged on guide rail 21, sleeve 23 is clamped by guiding sliding block 22, trundle module 24 is arranged at the bottom end of sleeve 23, transmission rod 25 extends vertically, driving structure 26 is used to drive the rotation of transmission rod 25, the transmission rod 25 is equipped with external thread, the sleeve 23 is equipped with internal thread and is matched with the external thread of transmission rod 25 Connection;The luggage case is equipped with power supply 4 and controller 5 (such as single-chip microcomputer controller) for controlling all electric telescopic trundle structures 2, the box body 1 is equipped with control button for controlling all trundle modules 24 to simultaneously extend trundle storage chamber 11 or retract trundle storage chamber 11.

[0021] When the user needs to use the hidden wheel type luggage to travel, the control button arranged outside the luggage is pressed to make the wheel extend, the control button transmits a signal to the controller 5 in the luggage, and the controller 5 starts the drive structure 26 of the electric telescopic wheel structure 2. The drive structure 26 starts to operate, drives the transmission rod 25 to rotate, and since the transmission rod 25 is provided with external threads, the sleeve 23 matched with the threads is provided with internal threads, and under the action of the thread transmission principle, along with the rotation of the transmission rod 25, and since the sleeve 23 is clamped by the guide block 22, the sleeve 23 can only stably vertically slide along the guide rail 21 vertically fixed on the inner wall of the wheel storage chamber 11, and further drive the bottom wheel module 24 to stably extend out of the wheel storage chamber 11 until the wheel module 24 is completely extended, so that the luggage can be normally moved by the wheels.

[0022] When reaching the destination, the control button is pressed again, the controller 5 receives the signal to control the drive structure 26 to reversely drive the transmission rod 25 to rotate, the sleeve 23 reversely slides along the guide rail 21 with the wheel module 24, and is retracted into the wheel storage chamber 11, so that the wheel is properly hidden, avoids the exposed wheel from being subjected to severe impact due to improper operation such as dragging and throwing, greatly reduces the damage and falling of the wheel stability, reduces the cost and time loss of the user due to the damage of the wheel, ensures that the luggage maintains normal movement function during transportation, and facilitates smooth travel.

[0023] Compared with the prior art, the hidden wheel type luggage provided by the utility model omits complex linkage components, adopts an electric telescopic wheel structure 2, and the overall structure is simplified, so that a large area and complex layout linkage structure space is not needed in the luggage, the available space in the luggage is increased, and it is more convenient for users to store luggage items. Only by pressing the control button outside the luggage, the wheel module 24 can be easily extended or retracted, without the need for complex actions such as pulling the movable pull rod as in the traditional linkage structure, so that the luggage wheel state can be conveniently and quickly operated by the old, children or people with less strength, and the use experience is improved.

[0024] Specifically, the driving structure 26 includes a support 261 fixed in the caster receiving chamber 11, a driving motor 262 arranged downward in the support 261, a first gear 263 arranged on an output end of the driving motor 262, and a second gear 264 coaxially arranged at a top end of the transmission rod 25, the second gear 264 being rotationally connected with a bottom surface of the support 261, and the first gear 263 being in meshing transmission with the second gear 264. The driving motor 262, the first gear 263, the second gear 264 and the support 261 are combined ingeniously and arranged compactly in the caster receiving chamber 11, so as to make full use of the originally idle space at the bottom corner of the luggage, without the need of opening up a large area of driving device placement area, which is consistent with the overall space planning requirement of the luggage and minimizes the occupation of the internal storage space of the luggage.

[0025] The first gear 263 and the second gear 264 are in meshing transmission, the gear transmission has high transmission accuracy, can accurately transmit the power output by the driving motor 262 to the transmission rod 25, and ensures that the angle and the number of turns of the transmission rod 25 meet the design expectation, so as to ensure that the sleeve 23 and the caster module 24 are stably extended or retracted according to the predetermined track, avoid abnormal displacement such as jamming and deviation, and improve the reliability of the operation of the luggage caster system.

[0026] Preferably, a T-shaped sliding groove 211 is arranged on the guide rail 21, the guide sliding block 22 includes a sliding block body 221 with a mounting hole and a T-shaped body 222 arranged on a side surface of the sliding block body 221, and the T-shaped body 222 is in sliding connection with the T-shaped sliding groove 211. The mounting hole of the sliding block body 221 is in interference fit with the sleeve 23, and the sliding connection between the T-shaped sliding groove 211 and the T-shaped body 222 precisely limits the movement path of the guide sliding block 22 in structure. The T-shaped structure can effectively prevent the sliding block from deviating or shaking in the left-right and front-back directions on the guide rail 21, so as to ensure that the sliding block body 221 can only smoothly slide along the predetermined vertical track of the guide rail 21, so that the caster module 24 always maintains a straight motion state during the extension and retraction process, greatly improves the accuracy and stability of the extension and retraction actions of the caster, and avoids abnormal conditions such as jamming and abnormal noise caused by deviation of the running track.

[0027] Specifically, the caster module 24 includes a swivel wheel 241, a screw 242, and a spring 243. A limiting block 244 is fitted onto the outer wall of the sleeve 23. An inner ring 231 is provided at the bottom end of the sleeve 23. The screw 242 is inserted into the sleeve 23 from top to bottom. The stud of the screw 242 passes through the inner ring 231 and is fixed to the top of the swivel wheel 241. The inner ring 231 restricts the head of the screw 242 from passing through. The spring 243 is fitted around the sleeve 23 and the screw 242, with the top end of the spring 243 pressing against the limiting block 244 and the bottom end of the spring 243 pressing against the swivel wheel 241. During the movement of the suitcase, it is inevitable to encounter bumpy roads, potholes, or minor collisions and throwing during handling. Spring 243 can absorb and dissipate impact energy from the ground or external forces, effectively reducing the transmission of vibration to the suitcase body 1 and other internal structures, preventing damage to the suitcase body 1 and the scattering of items due to severe vibration, while reducing wear on key components such as casters, sleeves 23 and guide rails 21 caused by frequent impacts, and extending the service life of the entire caster system.

[0028] To facilitate the handling of the suitcase, the top of the suitcase body 1 is equipped with a telescopic handle 31 and a first handle 32, and the side of the suitcase body 1 is equipped with a second handle 33. On flat surfaces and when the luggage is light, the suitcase can be easily pulled by the telescopic handle 31, which is labor-saving and convenient, and conforms to the daily travel habits of most people. When encountering stairs, steep slopes, or scenarios where the suitcase needs to be moved quickly over short distances, the user can easily lift the suitcase with one hand or use both hands to lift it with the help of the first handle 32 or the second handle 33, flexibly adapting to different road conditions and handling needs, and enhancing the practicality of the suitcase.

[0029] The adjustment button 311 on the telescopic pull rod 31 is linked to the control button. With this design, users no longer need to search for and press the buttons for controlling the caster extension and retraction and the button for adjusting the pull rod length in different locations on the suitcase. They can simultaneously adjust the pull rod length and extend or retract the casters simply by operating the adjustment button 311 on the telescopic pull rod 31. For example, when in a hurry, pressing and holding the adjustment button 311 on the telescopic pull rod 31 with one hand and pulling the rod upwards will automatically extend the caster module 24 into place, greatly simplifying the operation, saving time, and providing significant convenience for travel. Conversely, pressing and holding the adjustment button 311 on the telescopic pull rod 31 and pressing down to retract the pull rod will automatically retract the caster module 24 back into the suitcase body 1.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A concealed-wheel suitcase, characterized in that, The luggage includes a box body and four electric retractable casters. Each corner of the bottom of the box body has a caster storage chamber recessed into the inner cavity of the box. The electric retractable caster structure includes a guide rail vertically fixed to the inner wall of the caster storage chamber, a guide slider slidably mounted on the guide rail, a sleeve held by the guide slider, a caster module located at the bottom end of the sleeve, a vertically extending transmission rod, and a drive structure for driving the transmission rod to rotate. The transmission rod has an external thread, and the sleeve has an internal thread that engages with the external thread of the transmission rod. The luggage compartment contains a power supply and a controller for controlling all the electric retractable casters. The outside of the box has a control button for simultaneously extending or retracting all the caster modules into the caster storage chamber. The drive structure includes a support fixed inside the caster storage chamber and a downward-facing component within the support. The system includes a drive motor, a first gear mounted on the output end of the drive motor, and a second gear coaxially fixed to the top of the transmission rod. The second gear is rotatably connected to the bottom surface of the support, and the first gear meshes with the second gear for transmission. A T-shaped groove is provided on the guide rail. The guide slider includes a slider body with a mounting hole and a T-shaped body mounted on the side of the slider body. The T-shaped body is slidably connected to the T-shaped groove. The caster module includes a universal wheel, a screw, and a spring. A limiting block is fitted on the outer wall of the sleeve. An inner ring is provided at the bottom end of the sleeve. The screw is inserted into the sleeve from top to bottom. The stud of the screw passes through the inner ring and is fixed to the top of the universal wheel. The inner ring restricts the head of the screw from passing through. The spring is fitted around the sleeve and the screw, with the top end of the spring pressing against the limiting block and the bottom end of the spring pressing against the universal wheel.

2. The concealed wheel suitcase according to claim 1, characterized in that, The top of the box is equipped with a telescopic rod and a first handle, and the side of the box is equipped with a second handle.

3. The concealed wheel suitcase according to claim 2, characterized in that, The adjustment button on the telescopic rod is linked to the control button.

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