Cart with two-way handrails capable of being folded in staggered mode

Abstract

The invention discloses a cart with two-way handrails capable of being folded in a staggered mode, and belongs to the technical field of carts, the cart comprises a bearing body, a plurality of connecting pieces are arranged on the bearing body, mounting grooves and limiting holes are formed in the connecting pieces, the handrails are rotationally connected into the mounting grooves through pin shafts, and the two ends of limiting rods penetrate through the limiting holes to extend out of the bearing body; one end of the damping spring is connected to the pin shaft, and the other end of the damping spring is connected to the limiting rod. When the handrails need to be folded, a user only needs to step on the limiting rods, so that the limiting rods reach the bottoms along the inclined limiting holes, the bottoms of the connecting rods on the handrails rotate along the pin shafts to be folded and abut against the limiting plates, after folding is completed, the limiting rods automatically reset, and by means of the structure, the two handrails can be folded, and storage is convenient; meanwhile, the two armrests can be pulled by two hands together when the cart is turned around or dragged in a narrow channel, the cart body is prevented from steering out of control, the push-pull requirement of the cart in a complex space is met, and arm fatigue caused by keeping a fixed posture for a long time is avoided.

Description

Technical Field

[0001] This invention belongs to the field of trolley technology, and in particular relates to a trolley with a two-way foldable armrest. Background Technology

[0002] As a core tool for logistics and daily handling, cargo trolleys are flexibly adaptable to diverse scenarios with their modular design: their box-shaped or frame-like bodies stably support small items, while the extended bracket structure easily lifts long, heavy objects. Their detachable nature allows for efficient switching between warehousing and transportation. Equipped with solid or pneumatic tires and low-resistance bearings, they significantly improve efficiency through quiet gliding and labor-saving operation, whether in narrow corridors, on uneven ground, or over long distances. From supermarket shopping to industrial warehousing, from dedicated gas cylinder transport to loading and unloading flatbed equipment, their safety brakes, anti-slip handles, and load-bearing markings, along with low-cost maintenance and high durability, make them a powerful tool for reducing labor costs and ensuring the safety of goods.

[0003] However, the current single fixed handle structure of the trolley is prone to loss of control and steering when turning around in narrow passages or when lateral traction is required. It also cannot meet the needs of bidirectional or even multidirectional pushing and pulling in complex spaces. At the same time, the traditional handle is rigidly connected to the frame and lacks a folding or telescopic mechanism. This not only takes up extra space when storing the trolley, but may also cause the risk of bumps and knocks during handling due to protruding parts. In addition, the single-point force application design forces the operator to maintain a fixed posture for a long time, which aggravates wrist and arm fatigue. Summary of the Invention

[0004] The purpose of this invention is to address the problems of current trolleys with single fixed handle structures. In narrow passages, when turning around or requiring lateral traction, the one-way handle is prone to causing the trolley to lose control and veer due to force deviation, and it cannot meet the needs of bidirectional or even multidirectional pushing and pulling in complex spaces. Furthermore, traditional handles are rigidly connected to the frame, lacking folding or telescopic mechanisms. This not only occupies extra space during storage but also poses a risk of bumping and knocking during handling due to protruding parts. In addition, the single-point force application design forces the operator to maintain a fixed posture for extended periods, exacerbating wrist and arm fatigue. Therefore, this invention proposes a trolley with a bidirectional, staggered folding handle.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a trolley with a two-way foldable armrest, comprising:

[0006] The carrier has several connectors on it. Each connector has a mounting groove and a limiting hole. The handrail is rotatably connected to the mounting groove by a pin. Both ends of the limiting rod extend out of the carrier through the limiting hole.

[0007] A damping spring, one end of which is connected to the pin and the other end of which is connected to the limiting rod.

[0008] As a further description of the above technical solution:

[0009] The connector is provided with a fixing hole, the handrail is provided with a connecting rod, the connecting rod is provided with a connecting hole, and the pin passes through the fixing hole and the connecting hole to connect the connecting rod to the mounting groove.

[0010] As a further description of the above technical solution:

[0011] The tail of the pin is connected to the connector via a limiting head.

[0012] As a further description of the above technical solution:

[0013] The connector is fixed to the carrier by screws, and a limit plate is provided on the connector.

[0014] As a further description of the above technical solution:

[0015] The limiting hole is an inclined, waist-shaped hole.

[0016] As a further description of the above technical solution:

[0017] The damping spring includes a first connecting spring, a buffer tension spring, and a second connecting spring. The first connecting spring is sleeved on the pin and located between the connector and the pin. The second connecting spring is connected to the limiting rod. The buffer tension spring is located between the first connecting spring and the second connecting spring. The first connecting spring, the buffer tension spring, and the second connecting spring are arranged non-collinearly, and their axial directions are different from each other.

[0018] As a further description of the above technical solution:

[0019] The limiting rod is provided with a limiting block, and the second connecting spring is located outside the limiting block.

[0020] As a further description of the above technical solution:

[0021] The support body is provided with several buffer pads and several caster fixing holes, and the casters are connected to the bottom of the support body through the caster fixing holes.

[0022] As a further description of the above technical solution:

[0023] Several connectors on one side of the carrier are located between several connectors on the other side.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] 1. In this invention, several connectors are set on the carrier. The bottom of both handrails are connected to the connectors by pins and damping springs. The limiting rod is elastically connected to the limiting hole on the connector by the damping spring. When the handrail needs to be folded, simply step on the limiting rod so that the limiting rod moves along the inclined limiting hole to the bottom. The bottom of the connecting rod on the handrail rotates and folds along the pin and abuts against the limiting plate. After folding, the limiting rod automatically resets. This structure can realize the folding of the two handrails, which is convenient for storage. At the same time, the two handrails allow the trolley to turn around or be pulled in narrow passages. Both hands can be pulled together to avoid the trolley losing control and turning. This meets the pushing and pulling needs of the trolley in complex spaces and avoids arm fatigue caused by maintaining a fixed posture for a long time.

[0026] 2. In this invention, when the trolley handrail is unfolded, the limiting rod limits the side wall of the connecting rod, thereby improving the stability of the handrail in the unfolded state.

[0027] 3. In this invention, a damping spring is provided, which includes a first connecting spring, a buffer tension spring, and a second connecting spring. The first connecting spring, the buffer tension spring, and the second connecting spring are arranged non-collinearly, and their axial directions are different. The first connecting spring is connected to the pin, the second connecting spring is connected to the limiting rod, and the buffer tension spring is connected between the first connecting spring and the second connecting spring. The buffer tension spring provides damping force for the rotation of the handrail and improves the restoring force for the limiting rod. This structure allows the handrail to be folded in both directions.

[0028] 4. In this invention, the connector at the bottom of one handrail is arranged between the connectors at the bottom of another handrail to avoid conflict when the handrail is folded. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, 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 the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This refers to the folded state of a stroller with a two-way foldable armrest. Figure 1 .

[0031] Figure 2 This refers to the folded state of a stroller with a two-way foldable armrest. Figure 2 .

[0032] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0033] Figure 4 This refers to the folded state of a stroller with a two-way foldable armrest. Figure 3 .

[0034] Figure 5 This refers to the unfolded state of a trolley with a two-way foldable armrest. Figure 1 .

[0035] Figure 6 This refers to the unfolded state of a trolley with a two-way foldable armrest. Figure 2 .

[0036] Figure 7 for Figure 5 Enlarged view of section B in the middle.

[0037] Legend:

[0038] 1-Bearing body; 2-Connector; 3-Mounting groove; 4-Limiting hole; 5-Handrail; 6-Pin; 7-Damping spring; 71-First connecting spring; 72-Buffer tension spring; 73-Second connecting spring; 8-Fixing hole; 9-Connecting rod; 10-Connecting hole; 11-Limiting head; 12-Limiting plate; 13-Limiting block; 14-Buffer pad; 15-Caser fixing hole; 16-Limiting rod. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the description of the embodiments of the present invention, it should be noted that the terms "upper" and "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0044] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] Please see Figure 1-7 This invention provides a technical solution: a trolley with a two-way foldable armrest, comprising:

[0046] The carrier 1 is provided with a plurality of connectors 2. The connectors 2 are provided with mounting grooves 3 and limiting holes 4. The handrail 5 is rotatably connected to the mounting grooves 3 by a pin 6. Both ends of the limiting rod extend through the limiting holes 4 to the outside of the carrier 1.

[0047] The damping spring 7 has one end connected to the pin 6 and the other end connected to the limiting rod 16.

[0048] The connector 2 is provided with a fixing hole 8, the handrail 5 is provided with a connecting rod 9, the connecting rod 9 is provided with a connecting hole 10, and the pin 6 passes through the fixing hole 8 and the connecting hole 10 to connect the connecting rod 9 to the mounting groove 3.

[0049] The tail of the pin 6 is connected to the connector 2 via a limiting head 11.

[0050] The connector 2 is fixed to the carrier 1 by screws, and a limit plate 12 is provided on the connector 2.

[0051] The limiting hole 4 is an inclined, waist-shaped hole. This allows the foot to step on the limiting rod, guiding it along the inclined waist-shaped hole to its bottom, where it is furthest from the bottom of the handrail connecting rod, thus preventing the connecting rod at the bottom of the handrail from interfering with the limiting rod when the handrail is folded.

[0052] The damping spring 7 includes a first connecting spring 71, a buffer tension spring 72, and a second connecting spring 73. The first connecting spring 71 is sleeved on the pin 6 and located between the connecting member 2 and the pin 6. The second connecting spring 73 is connected to the limiting rod 16. The buffer tension spring 72 is located between the first connecting spring 71 and the second connecting spring 73. The first connecting spring 71, the buffer tension spring 72, and the second connecting spring 73 are arranged non-collinearly, and their axial directions are different from each other.

[0053] A limiting block 13 is provided on the limiting rod 16, and the second connecting spring 73 is located outside the limiting block 13. This limits the position of the limiting rod, preventing it from exiting the limiting hole and ensuring that the limiting rod is always positioned at the side end of the connecting rod.

[0054] The carrier 1 is provided with several buffer pads 14 and several caster fixing holes 158. The casters are connected to the bottom of the carrier 1 through the caster fixing holes 158. The buffer pads increase the friction between the goods and the carrier, improving the stability of the goods. The swivel casters are connected to the bottom of the trolley through the caster fixing holes.

[0055] Several connectors 2 on one side of the support body 1 are located between several connectors 2 on the other side. This prevents the handrail from interfering with each other during folding.

[0056] Working principle: Several connectors are set on the carrier. The bottom of both handrails are connected to the connectors by pins and damping springs. The limiting rod is elastically connected to the limiting hole on the connector by the damping spring. When the handrail needs to be folded, simply step on the limiting rod, so that the limiting rod moves along the inclined limiting hole to the bottom. The bottom of the connecting rod on the handrail rotates and folds along the pin, abutting against the limiting plate. After folding, the limiting rod automatically returns to its original position. This structure can realize the folding of both handrails for easy storage. At the same time, the two handrails allow the trolley to turn around or be pulled in narrow passages by pulling both handrails together, preventing the trolley from losing control and turning. This meets the pushing and pulling needs of the trolley in complex spaces and avoids arm fatigue caused by maintaining a fixed posture for a long time.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A trolley with a two-way foldable armrest, characterized in that, include: The carrier has several connectors on it. Each connector has a mounting groove and a limiting hole. The handrail is rotatably connected to the mounting groove by a pin. Both ends of the limiting rod extend out of the carrier through the limiting hole. A damping spring, one end of which is connected to the pin and the other end of which is connected to the limiting rod.

2. The trolley with a two-way foldable armrest according to claim 1, characterized in that, The connector is provided with a fixing hole, the handrail is provided with a connecting rod, the connecting rod is provided with a connecting hole, and the pin passes through the fixing hole and the connecting hole to connect the connecting rod to the mounting groove.

3. A trolley with a two-way foldable armrest according to claim 2, characterized in that, The tail of the pin is connected to the connector via a limiting head.

4. A trolley with a bidirectional, foldable armrest as described in claim 3, characterized in that, The connector is fixed to the carrier by screws, and a limit plate is provided on the connector.

5. A trolley with a bidirectional, foldable armrest according to claim 1, characterized in that, The limiting hole is an inclined, waist-shaped hole.

6. A trolley with a bidirectional, foldable armrest according to claim 1, characterized in that... The damping spring includes a first connecting spring, a buffer tension spring, and a second connecting spring. The first connecting spring is sleeved on the pin and located between the connector and the pin. The second connecting spring is connected to the limiting rod. The buffer tension spring is located between the first connecting spring and the second connecting spring. The first connecting spring, the buffer tension spring, and the second connecting spring are arranged non-collinearly, and their axial directions are different from each other.

7. A trolley with a bidirectional, foldable armrest according to claim 6, characterized in that, The limiting rod is provided with a limiting block, and the second connecting spring is located outside the limiting block.

8. A trolley with a bidirectional, foldable armrest according to claim 7, characterized in that, The support body is provided with several buffer pads and several caster fixing holes, and the casters are connected to the bottom of the support body through the caster fixing holes.

9. A trolley with a bidirectional, foldable armrest according to claim 7, characterized in that, Several connectors on one side of the carrier are located between several connectors on the other side.

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