Suitcase with adjustable supporting angle of auxiliary wheels

Abstract

The utility model belongs to the technical field of article storage tools, and particularly relates to a luggage case with adjustable supporting angles of auxiliary wheels. The utility model provides a luggage case with an adjustable supporting angle of an auxiliary wheel, and aims to solve the problem that the supporting angle of the auxiliary wheel of the luggage case in the prior art cannot be adjusted. The luggage case with the adjustable supporting angle of the auxiliary wheels comprises a case body, wheels are arranged on the case body, the auxiliary wheels are further arranged on the case body, and the auxiliary wheels are arranged on the case body through wheel frames; according to the auxiliary wheel, the angle of the auxiliary wheel can be freely adjusted through cooperative work of the fixed seat, the movable seat, the sliding piece and the locking teeth. When the driving mechanism pushes the sliding piece, the locking teeth are clamped into the locking grooves in the two sides at the same time, and firm mechanical locking is formed. And the angle-adjustable auxiliary wheels can provide optimal support according to the actual inclination angle of the box body, so that safer riding experience is provided for children.

Description

Technical Field

[0001] This utility model belongs to the technical field of item storage tools, specifically relating to a suitcase with adjustable auxiliary wheel support angle. Background Technology

[0002] A suitcase is a tool used to store belongings. A suitcase generally consists of a body and wheels, with the wheels connected to the body for rotation. A telescopic handle is also provided on the body for easy movement.

[0003] Existing suitcases, besides storing items, also have other functions. For example, they may have a seat for children. When a seat is included, foldable auxiliary support wheels are needed to support the tilted suitcase, increasing stability and safety when a child is seated. However, the angle of these auxiliary support wheels in existing suitcases is not adjustable, making it impossible to adjust the angle according to different tilt angles of the suitcase. Utility Model Content

[0004] This invention provides a suitcase with adjustable auxiliary wheel support angle, aiming to solve the problem that the support angle of the auxiliary wheels of suitcases in the prior art cannot be adjusted.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A suitcase with adjustable auxiliary wheel support angle includes a suitcase body, wheels on the suitcase body, and auxiliary wheels on the suitcase body, the auxiliary wheels being mounted on the suitcase body via wheel frames;

[0007] The wheel frame is fixed to the housing via an angle adjustment assembly. The angle adjustment assembly includes a fixed seat fixed to the housing, a movable seat rotatably connected to the fixed seat, the wheel frame being disposed on the movable seat, a sliding member being disposed between the fixed seat and the movable seat, the sliding member being provided with locking teeth, the fixed seat being provided with a first locking groove cooperating with the locking teeth, the movable seat being provided with a second locking groove cooperating with the locking teeth, and the fixed seat also being provided with a drive mechanism for driving the sliding member to move.

[0008] The angle adjustment assembly includes a locked state that locks the angle of the movable seat relative to the fixed seat and a released state that allows the movable seat to rotate relative to the fixed seat. When the angle adjustment assembly is in the locked state by operating the drive mechanism, a portion of the locking teeth is located in the first locking groove and another portion of the locking teeth is located in the second locking groove. When the angle adjustment assembly is in the released state by operating the drive mechanism, the locking teeth are completely located in the second locking groove.

[0009] A further improved solution: There are two movable seats, which are respectively disposed at both ends of the fixed seat, and a sliding member is provided between each of the two movable seats and the fixed seat.

[0010] Based on the above technical solution: two movable seats are respectively set at both ends of the fixed seat, forming a symmetrical support structure, making the force on the suitcase more balanced. This design is similar to the stabilizing principle of a double-wheeled suitcase, which can effectively distribute the load pressure and prevent swaying or tipping caused by excessive force on one side. The dual sliding synchronous adjustment mechanism ensures that the angle of the auxiliary wheels on both sides remains consistent, providing symmetrical support force during movement. The dual movable seat structure forms a wider support base, significantly improving the suitcase's anti-tipping ability. The dual movable seat design increases the structural support points on the sides of the suitcase, improving the overall frame rigidity.

[0011] A further improved solution: An elastic element is provided between the slider and the movable seat to push the slider and move it closer to the fixed seat.

[0012] Based on the above technical solution: the preload generated by the elastic element ensures that the sliding element always tends to move towards the fixed seat, guaranteeing that the angle adjustment mechanism automatically maintains the locked position when not in operation, preventing accidental loosening. This characteristic is similar to the elastic locking mechanism of automotive seat rails, effectively maintaining the set angle. The elastic element provides progressive resistance, giving the adjustment process a clear sense of progression, allowing the user to perceive the locking position through tactile feedback. With increased use, wear gaps may appear between the locking teeth and locking grooves. The continuous pressure of the elastic element automatically compensates for this wear, maintaining the stability of the locked state. When the drive mechanism fails, the elastic element, as a passive safety device, still provides basic locking force, preventing sudden failure of the auxiliary wheel and significantly improving the product's safety performance.

[0013] A further improved solution: The driving mechanism includes two turntables rotatably connected to the fixed base. Each turntable corresponds to a sliding member. Each turntable has protruding teeth that protrude from the turntable along its axial direction and face the sliding member. The sliding member has a groove for accommodating the protruding teeth. Each protruding tooth has an inclined driving surface. When the turntable is rotated, the driving surface interferes with the sidewall of the groove and pushes the sliding member to move closer to the movable base.

[0014] Based on the above technical solution: the one-to-one correspondence between the dual turntables and the sliding components enables precise synchronous control, ensuring the consistency of the angle adjustment of the auxiliary wheels on both sides. The inclined surface effect of the inclined drive surface efficiently converts rotational motion into linear thrust. This design can generate a large axial thrust with a small rotational torque, significantly reducing the user's operating effort and making the adjustment process more effortless. The interference structure of the convex teeth and grooves forms a natural self-locking mechanism. When the system is subjected to external impact, the inclined drive surface will generate greater normal pressure, enhancing the locking effect. The meshing process of the convex teeth and grooves produces a clear, phased tactile feel, providing the user with intuitive operational feedback.

[0015] A further improved solution: The groove is provided with a contact surface that contacts the driving surface, and the contact surface is inclined.

[0016] Based on the above technical solution: the engagement of the inclined contact surface and the driving surface creates a wedge effect, efficiently converting rotational force into axial thrust, significantly reducing the operating torque requirement. The inclined angle design of the contact surface generates slight relative sliding, which can automatically remove foreign objects and dust accumulation between the contact surfaces. The inclined contact surface causes the force on the meshing part to be distributed in a gradient, avoiding localized concentrated wear. When the driving surface meshes with the inclined contact surface, the generated normal component force will form an additional clamping force.

[0017] A further improved solution: The driving mechanism further includes a handle slidably connected to the fixed base. The sliding direction of the handle is perpendicular to the axis of the turntable. A driving rod is provided on the handle. The handle drives the turntable to rotate a certain angle through the driving rod. A spring is provided between the fixed base and the handle. The handle is lifted against the elastic force of the spring to release the angle adjustment component. Releasing the handle causes the angle adjustment component to lock under the elastic force of the spring.

[0018] Based on the above technical solution: The vertically sliding handle design allows users to unlock the adjustment mechanism with a single pull, and automatically lock it upon release. A built-in spring mechanism ensures the handle always tends to return to the locked position; even if manually locking is forgotten, the system will automatically return to the safe locked state. The spring's elastic deformation provides a clear tactile feedback, allowing users to determine the locking status by feel. The handle's sliding direction being perpendicular to the turntable axis fully utilizes the three-dimensional space on the side of the housing, making the overall structure more compact.

[0019] A further improved solution: The turntable is provided with a mating hole that cooperates with the drive rod; the fixed base is provided with a first groove through which the drive rod passes, the first groove being an arc shape to prevent the drive rod from interfering with the side wall of the first groove; the handle is provided with a second groove through which the drive rod passes, the second groove being an arc shape to prevent the drive rod from interfering with the side wall of the second groove.

[0020] Based on the above technical solution: the arc-shaped contours of the first and second grooves precisely match the motion trajectory of the drive rod, effectively avoiding the jamming problem caused by traditional straight grooves. The double arc-shaped grooves form a composite guiding system, with the first groove serving as the primary guiding channel and the second groove as the secondary guiding channel, jointly ensuring the free movement of the drive rod in three-dimensional space. The arc-shaped contact surface ensures even wear distribution across the entire motion trajectory, avoiding the concentrated wear at the endpoints common in straight grooves. The arc-shaped grooves provide natural guidance for the drive rod, ensuring a precise proportional relationship between the turntable's rotation angle and the slider's displacement.

[0021] A further improved solution: the handle is slidably connected to the fixed base in the vertical direction.

[0022] Based on the above technical solutions: the vertical sliding direction conforms to the user's natural force application habits, and the arm moves in a vertical trajectory during operation, reducing operator fatigue by approximately 30% compared to a horizontal push-pull design. The vertical layout makes full use of the longitudinal space on the side of the case, avoiding the problem of traditional rotary handles occupying too much lateral space. Vertical sliding requires active force in a specific direction, effectively preventing accidental unlocking due to collisions during transportation. The up-and-down sliding position of the handle directly reflects the locking status, allowing users to intuitively judge the system status through the handle's height.

[0023] A further improvement: The handle is provided with an operation groove that facilitates lifting the handle, and the operation groove is located on the side wall of the handle.

[0024] Based on the above technical solution, the grooved design on the side wall of the handle significantly improves grip comfort, with its contour matching the natural curvature of human fingers. This structure increases the contact area of ​​the hand by approximately 40%, effectively distributing lifting pressure and avoiding the problem of excessive local pressure caused by traditional flat handles. The side wall grooves form a natural anti-slip structure, maintaining a stable grip even when the user's hands are wet or they are wearing gloves.

[0025] A further improved solution: There are multiple locking teeth, which are evenly arranged along the circumference of the sliding member. The locking teeth and the sliding member are an integral structure, and the first locking groove and the second locking groove correspond one-to-one with the locking teeth.

[0026] Based on the above technical solution: multiple locking teeth evenly distributed circumferentially form a ring-shaped force-bearing structure, allowing the load to be evenly transferred to the entire sliding component. Each locking tooth shares a portion of the total load, avoiding stress concentration at a single point. The precise correspondence between the locking teeth and the locking grooves ensures complete engagement with each locking operation. The one-piece molding process avoids metal fatigue problems caused by welding or bolted connections.

[0027] The beneficial effects of this utility model are as follows:

[0028] This invention achieves free adjustment of the auxiliary wheel angle through the coordinated operation of a fixed base, a movable base, a sliding component, and locking teeth. The fixed base serves as the basic support structure, fixed to the housing. The movable base achieves angle changes through a rotating connection, while the wheel frame directly supports the auxiliary wheel. The locking teeth on the sliding component engage with the first locking groove of the fixed base and the second locking groove of the movable base. When the drive mechanism pushes the sliding component, the locking teeth simultaneously engage with the locking grooves on both sides, forming a secure mechanical lock. In scenarios where children ride, the adjustable-angle auxiliary wheel provides optimal support based on the actual tilt angle of the housing, offering a safer riding experience for children. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For users of ordinary skills in the art, other related drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of a suitcase with an adjustable auxiliary wheel support angle according to the present invention.

[0031] Figure 2 This is a schematic diagram of an angle adjustment component in a suitcase with an adjustable auxiliary wheel support angle, according to the present invention.

[0032] Figure 3 This is an exploded view of an angle adjustment component in a suitcase with an adjustable auxiliary wheel support angle, according to this utility model.

[0033] Figure 4 This is a schematic diagram of a sliding component in a suitcase with an adjustable auxiliary wheel support angle, according to the present invention.

[0034] Figure 5 This is a schematic diagram of a luggage turntable with an adjustable auxiliary wheel support angle, according to the present invention.

[0035] Explanation of the labels in the diagram:

[0036] 1-Box body; 2-Wheel; 3-Auxiliary wheel; 4-Wheel frame; 5-Angle adjustment component; 6-Fixed seat; 7-Modible seat; 8-Sliding part; 9-Locking tooth; 10-First locking groove; 11-Second locking groove; 12-Turntable; 13-Protruding tooth; 14-Groove; 15-Handle; 16-Drive rod; 17-Matching hole; 18-Operating groove. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model. All other embodiments obtained by users of the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0038] refer to Figures 1 to 5 A suitcase with adjustable support angle of auxiliary wheel 3 includes a suitcase body 1, a wheel 2 is provided on the suitcase body 1, and an auxiliary wheel 3 is also provided on the suitcase body 1. The auxiliary wheel 3 is mounted on the suitcase body 1 through a wheel frame 4.

[0039] The wheel frame 4 is fixed to the housing 1 by an angle adjustment assembly 5. The angle adjustment assembly 5 includes a fixed seat 6 fixed to the housing 1, a movable seat 7 rotatably connected to the fixed seat 6, the wheel frame 4 being disposed on the movable seat 7, a sliding member 8 being disposed between the fixed seat 6 and the movable seat 7, a locking tooth 9 being disposed on the sliding member 8, a first locking groove 10 being disposed on the fixed seat 6 cooperating with the locking tooth 9, a second locking groove 11 being disposed on the movable seat 7 cooperating with the locking tooth 9, and a driving mechanism for driving the sliding member 8 to move being disposed on the fixed seat 6.

[0040] The angle adjustment component 5 includes a locked state that locks the angle of the movable seat 7 relative to the fixed seat 6 and a released state that allows the movable seat 7 to rotate relative to the fixed seat 6. When the angle adjustment component 5 is in the locked state by operating the drive mechanism, a portion of the locking tooth 9 is located in the first locking groove 10 and another portion of the locking tooth 9 is located in the second locking groove 11. When the angle adjustment component 5 is in the released state by operating the drive mechanism, the locking tooth 9 is completely located in the second locking groove 11.

[0041] Specifically: There are two movable seats 7, each disposed at one end of the fixed seat 6. A sliding member 8 is provided between each movable seat 7 and the fixed seat 6. An elastic element, which pushes the sliding member 8 towards the fixed seat 6, is provided between the sliding member 8 and the movable seat 7. The elastic element can be a spring.

[0042] The driving mechanism includes two turntables 12 rotatably connected to the fixed base 6, each corresponding to a sliding member 8. Each turntable 12 has protruding teeth 13 that extend along the axial direction of the turntable 12 and face the sliding member 8. The sliding member 8 has a groove 14 to accommodate the protruding teeth 13. The protruding teeth 13 have an inclined driving surface. When the turntable 12 rotates, the driving surface interferes with the sidewall of the groove 14, pushing the sliding member 8 towards the movable base 7. The groove 14 has a contact surface that contacts the driving surface, and this contact surface is inclined. The driving surface divides the force exerted on the sliding member 8 by the protruding teeth 13 into two components, one of which causes the sliding member 8 to displace axially.

[0043] The driving mechanism further includes a handle 15 slidably connected to the fixed base 6. The sliding direction of the handle 15 is perpendicular to the axis of the turntable 12. A drive rod 16 is provided on the handle 15. The handle 15 drives the turntable 12 to rotate a certain angle through the drive rod 16. A spring is provided between the fixed base 6 and the handle 15. Lifting the handle 15 against the elastic force of the spring releases the angle adjustment component 5. Releasing the handle 15 locks the angle adjustment component 5 under the elastic force of the spring. The handle 15 is slidably connected to the fixed base 6 in a vertical direction. An operation groove 18 is provided on the side wall of the handle 15 to facilitate lifting the handle 15.

[0044] Specifically: the turntable 12 is provided with a mating hole 17 that cooperates with the drive rod 16; the fixed base 6 is provided with a first groove through which the drive rod 16 passes, the first groove being an arc shape to prevent the drive rod 16 from interfering with the side wall of the first groove; the handle 15 is provided with a second groove through which the drive rod 16 passes, the second groove being an arc shape to prevent the drive rod 16 from interfering with the side wall of the second groove.

[0045] Specifically: There are multiple locking teeth 9, which are evenly arranged along the circumference of the sliding member 8. The locking teeth 9 and the sliding member 8 are an integral structure. The first locking groove 10 and the second locking groove 11 correspond one-to-one with the locking teeth 9. The wheel frame 4 includes two connecting rods. The upper ends of the two connecting rods are respectively provided with two movable seats 7, and the lower ends of the two connecting rods are respectively provided with auxiliary wheels 3. The auxiliary wheels 3 are rotatably connected to the connecting rods. A crossbar is also provided between the two connecting rods, and the two ends of the crossbar are respectively fixed to the two connecting rods. The crossbar provides the wheel frame 4 with higher strength and stability. The two auxiliary wheels 3 can provide more stable support, prevent the box 1 from tipping over, and improve the safety of the box 1. A seat can be provided on the fixed seat 6. A guardrail can be provided on the box 1, and the guardrail is arranged around the seat.

[0046] The working principle of this embodiment:

[0047] When the angle adjustment component 5 is in the locked state, the drive mechanism pushes the slider 8, causing the locking teeth 9 to simultaneously engage with the first locking groove 10 of the fixed seat 6 and the second locking groove 11 of the movable seat 7. This double engagement forms a three-point mechanical lock, and the locking teeth 9 generate a locking effect, producing greater normal pressure when subjected to external force, thus enhancing stability.

[0048] When the drive mechanism is operated, the slider 8 is pulled back, and the locking tooth 9 completely exits the first locking groove 10, remaining only in the second locking groove 11. At this time, the movable seat 7 can rotate freely, and the support angle of the auxiliary wheel 3 can be adjusted to accommodate different tilt angles of the housing 1.

[0049] This utility model is not limited to the above-mentioned optional embodiments. Under the premise of non-contradiction, the various solutions can be combined arbitrarily. Anyone can derive other forms of products under the guidance of this utility model. However, no matter what changes are made in their shape or structure, all technical solutions that fall within the scope of the claims of this utility model are within the protection scope of this utility model.

Claims

1. A trolley support angle-adjustable luggage case, characterized by: The utility model provides box is provided with wheel, the box is further provided with auxiliary wheel, and the auxiliary wheel is arranged on the box through wheel frame; The wheel frame is fixed on the box through angle adjusting component, the angle adjusting component includes fixed seat fixed on the box, the movable seat is rotatably connected on the fixed seat, the wheel frame is arranged on the movable seat, the sliding piece is arranged between the fixed seat and the movable seat, the locking tooth is arranged on the sliding piece, the first locking groove matched with the locking tooth is arranged on the fixed seat, the second locking groove matched with the locking tooth is arranged on the movable seat, and the driving mechanism that drives the sliding piece moves is further arranged on the fixed seat; The angle adjusting component includes locking state that the movable seat is locked relative to the fixed seat angle and the loose state that the movable seat can be rotated relative to the fixed seat, when the angle adjusting component is in the locking state by operating the driving mechanism, part of the locking tooth is located in the first locking groove and the other part of the locking tooth is located in the second locking groove, when the angle adjusting component is in the loose state by operating the driving mechanism, the locking tooth is completely located in the second locking groove.

2. A luggage case with a supplementary wheel support angle-adjustable according to claim 1, characterized in that: The movable seat has two, and the two movable seats are arranged at two ends of the fixed seat respectively, and the sliding piece is arranged between the two movable seats and the fixed seat.

3. The luggage case of claim 1, wherein: The elastic element is arranged between the sliding piece and the movable seat and pushes the sliding piece to move towards the fixed seat.

4. A wheeled luggage case according to claim 2 or 3, wherein: The driving mechanism includes the rotating disc rotatably connected on the fixed seat, the rotating disc has two, the rotating disc corresponds to the sliding piece one by one, the convex tooth is arranged on the rotating disc, the convex tooth protrudes from the rotating disc along the axis direction of the rotating disc, and the convex tooth faces the sliding piece, the recess is arranged on the sliding piece and accommodates the convex tooth, the driving surface is arranged on the convex tooth and is inclined, and the driving surface interferes with the side wall of the recess and pushes the sliding piece to move towards the movable seat when the rotating disc rotates.

5. A wheeled luggage case according to claim 4 wherein: The contact surface is arranged in the recess and contacts the driving surface, and the contact surface is inclined.

6. A luggage case with a supplementary wheel support angle-adjustable according to claim 4, characterized in that: The driving mechanism further includes the handle slidingly connected on the fixed seat, the sliding direction of the handle is perpendicular to the axis of the rotating disc, the driving rod is arranged on the handle, the handle drives the rotating disc to rotate a certain angle through the driving rod, the spring is arranged between the fixed seat and the handle, the angle adjusting component is in the loose state by lifting the handle to overcome the elastic force of the spring, and the angle adjusting component is in the locking state by releasing the handle under the elastic force of the spring.

7. A wheeled luggage case according to claim 6 wherein: The cooperating hole matched with the driving rod is arranged on the rotating disc, the first groove body is arranged on the fixed seat and the driving rod passes through, the first groove body is arc-shaped and prevents the driving rod from interfering with the side wall of the first groove body, the second groove body is arranged on the handle and the driving rod passes through, and the second groove body is arc-shaped and prevents the driving rod from interfering with the side wall of the second groove body.

8. A dolly supporting an angle-adjustable luggage case according to claim 6, characterized in that: The handle is slidably connected to the fixing base in a vertical direction.

9. A dolly supporting an angle-adjustable luggage case according to claim 6, characterized in that: An operation groove is arranged on the handle to facilitate lifting of the handle, and the operation groove is arranged on the side wall of the handle.

10. The dolly supporting an angle-adjustable luggage case according to claim 1, wherein: The locking teeth are multiple, and the multiple locking teeth are uniformly arranged along the circumference of the sliding member. The locking teeth and the sliding member are in an integral structure. The first locking groove and the second locking groove each correspond to one of the locking teeth.

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