A new folding stroller

Abstract

The application discloses a novel folding cart, comprising a bottom plate, a front wheel set arranged oppositely and rotatably at the bottom of the front end of the bottom plate, a handle assembly rotatably arranged at the front end of the bottom plate, and a locking assembly arranged at the bottom of the bottom plate, wherein the locking assembly comprises an unlocking button and a locking part, the unlocking button is arranged on the bottom plate through an elastic part and is fixedly connected with the locking part located below the bottom plate, the elastic part can drive the locking part to lock at least two angles between the handle assembly and the bottom plate, so that the cart state and the pulling cart state can be switched and locked; when the folding cart is in the folding state, the front wheel set is in the storage state; when the folding cart is in the pulling cart state and the cart state, the front wheel set is in the unfolded state and is perpendicular to the bottom plate.

Description

Technical Field

[0001] This application relates to the field of folding trolley technology, and in particular to a novel folding trolley. Background Technology

[0002] As a push-pull loading tool, the handcart is a small cart that is convenient for short-distance transportation of small amounts of goods. It has become increasingly popular in our lives, especially for leisure, travel, shopping, delivery, loading and unloading of goods, and childcare. These products are indispensable and have indeed provided us with a lot of convenience. In order to adapt to various usage environments, there is a folding trailer on the market that can be used as both a pushcart and a pullcart.

[0003] In some folding trailers, the front wheels are unfolded and supported by the upright assembly. Therefore, the locking assembly needs to fix the angle between the upright assembly and the chassis assembly. Existing folding trailers use multiple sets of elastic components and sliding parts. During use, it is often necessary to simultaneously drive the locking of the upright assemblies at both ends, which makes the structure relatively complex and difficult to assemble. At the same time, due to the straight structural design of the uprights, the upright assembly and the chassis assembly are parallel when the trailer is pulled, and it is impossible to continue supporting the unfolded front wheels. This makes it unusable in some situations where the chassis assembly in the pulled state needs to be laid flat for stacking items. Therefore, how to solve the above problems is the purpose of this application.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention

[0005] Based on this, this application provides a novel folding trolley to solve one of the aforementioned technical problems.

[0006] The technical solution adopted by this application to solve its technical problem is a novel folding trolley, comprising: a base plate; a front wheel assembly, which is rotatably disposed at the bottom of the front end of the base plate; an armrest assembly, which is rotatably disposed at the front end of the base plate; and a locking assembly, which is disposed at the bottom of the base plate. The locking assembly includes an unlock button and a locking part. The unlock button is disposed on the base plate through an elastic member and is fixedly connected to the locking part located below the base plate. The elastic member can drive the locking part to lock at least two angles between the armrest assembly and the base plate, so as to switch between the push trolley state and the pull trolley state and complete the locking.

[0007] In some embodiments, the armrest assembly has two connecting tubes, the ends of which are formed with arc-shaped transition portions, and a drive tube parallel to the connecting tubes is provided at the end of the arc-shaped transition portion. When the folding trolley is in a folded state, the front wheel assembly is in a stowed state. When the folding trolley is in a pulling state or a pushing state, the front wheel assembly is in an unfolded state and remains perpendicular to the base plate.

[0008] In some embodiments, a crossbar is fixedly disposed between the drive tubes, and the handrail assembly is rotatably disposed at the front end of the base plate via the crossbar.

[0009] In some embodiments, the crossbar passes through the locking assembly, and a limiting plate is fixedly provided on the crossbar. The limiting plate has two notches corresponding to the pushing state and the pulling state, respectively. The locking part includes a round rod that can be engaged into the notch.

[0010] In some embodiments, the base plate has an unlocking groove, and the bottom of the unlocking groove also has a fully penetrating connecting groove, and the unlocking button can slide within the unlocking groove.

[0011] In some embodiments, the locking part further includes a round rod bracket and a limiting shell. The round rod is fixedly mounted on the round rod bracket, and the unlocking button is connected to the round rod bracket through a connecting groove. A limiting groove is formed on the limiting shell, and both ends of the round rod can pass through the limiting shell and slide within the limiting groove.

[0012] In some embodiments, the front wheel assembly has a contact surface on the side near the armrest assembly, and the outer edge of the contact surface is arc-shaped. When the drive tube rotates, it can contact the contact surface and move along its arc-shaped outer edge, thereby driving the front wheel assembly to rotate to the unfolded state.

[0013] In some embodiments, a torsion spring is provided at the rotation axis of the front wheel assembly, which can drive the front wheel assembly to rotate in the retracted state at all times. The armrest assembly can support the contact surface of the front wheel assembly through its drive tube and arc-shaped transition portion to maintain the front wheel assembly in the deployed state. In the push state, the contact surface contacts both the drive tube and the arc-shaped transition portion. In the pull state, the contact surface contacts the arc-shaped transition portion.

[0014] In some embodiments, a support column is fixedly provided on the base plate, and the support column can support the front wheel assembly on one side when the front wheel assembly is in the storage state, so that the front wheel assembly can be parallel to the ground.

[0015] The beneficial effects of this application are as follows: by setting a locking component integrated on the base plate, and using the elastic component to drive the locking part to cooperate with the limiting plate on the crossbar of the handrail assembly, the two states of pushing and pulling the cart can be quickly switched and reliably locked. The structure is simple and compact, effectively reducing manufacturing costs and assembly costs. At the same time, the arc-shaped transition part and the drive tube can form a large support area to support the front wheel assembly, so that the front wheel assembly can also remain in the extended state when the cart is being pulled. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the stroller status in this application.

[0018] Figure 2 This is a schematic diagram of the pulling state of the cart in this application.

[0019] Figure 3 This is a schematic diagram of the folded state of this application.

[0020] Figure 4 This is a schematic diagram of the handrail component of this application.

[0021] Figure 5 This is a partial cross-sectional schematic diagram of the locking structure of this application.

[0022] Figure 6 This is a schematic diagram of the front wheel assembly structure of this application.

[0023] The following are the reference numerals: 1. Base plate; 11. Unlocking groove; 111. Connecting groove; 12. Support column; 2. Front wheel assembly; 21. Contact surface; 22. Torsion spring; 3. Armrest assembly; 31. Connecting tube; 311. Arc-shaped transition part; 32. Drive tube; 33. Crossbar; 34. Limiting plate; 341. Notch; 4. Locking assembly; 41. Unlocking button; 42. Locking part; 421. Round rod; 422. Round rod bracket; 423. Limiting shell; 4231. Limiting groove; 43. Elastic component. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.

[0025] In the embodiments of this application, please refer to Figure 1-6As shown, this application provides a novel folding trolley, mainly comprising: a base plate 1; a front wheel assembly 2, which is rotatably disposed at the bottom of the front end of the base plate 1; a handle assembly 3, which is rotatably disposed at the front end of the base plate 1; and a locking assembly 4, which is disposed at the bottom of the base plate 1. The locking assembly 4 includes an unlock button 41 and a locking part 42. The unlock button 41 is disposed on the base plate 1 through an elastic member 43 and is fixedly connected to the locking part 42 located below the base plate 1. The elastic member 43 can drive the locking part 42 to lock at least two angles between the handle assembly 3 and the base plate 1, so as to switch between the push trolley state and the pull trolley state and complete the locking.

[0026] Specifically, the unlock button 41 is exposed above the base plate 1. The user can unlock the locking part 42 by pressing the unlock button 41 to overcome the rebound force of the elastic component 43. After unlocking, the armrest assembly 3 can rotate freely.

[0027] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.

[0028] Reference Figure 4 As shown, the armrest assembly 3 has two connecting pipes 31. The ends of the connecting pipes 31 form arc-shaped transition portions 311, and a drive pipe 32 parallel to the connecting pipes 31 is provided at the end of the arc-shaped transition portions 311. The arc-shaped transition portions 311 of the connecting pipes 31 can form a large support plane with the drive pipe 32. The trolley state, which is parallel to the base plate 1, can also support the front wheel assembly 2. Therefore, when the folding trolley is in the folded state, the front wheel assembly 2 is in the stowed state. When the folding trolley is in the trolley state or the push trolley state, the front wheel assembly 2 is in the unfolded state and remains perpendicular to the base plate 1.

[0029] Specifically, in order to enable the drive tube 32 to rotate on the base plate 1, a crossbar 33 is fixedly arranged between the drive tubes 32, and the handrail assembly 3 is rotatably arranged at the front end of the base plate 1 through the crossbar 33.

[0030] Reference Figure 4-5 As shown, the crossbar 33 passes through the locking assembly 4. A limiting plate 34 is fixedly installed on the crossbar 33. The limiting plate 34 has two notches 341, which correspond to the pushing state and the pulling state, respectively. The locking part 42 includes a round rod 421 that can be inserted into the notch 341. When the round rod 421 is inserted into the notch 341, the round rod 421 can only move up and down under the action of the unlocking part. Therefore, when the unlocking button 41 is not pressed, the armrest assembly 3 cannot continue to rotate because the limiting plate 34 is restricted by the round rod 421, so that the notch 341 can correspond to the pushing state and the pulling state. The locking of the folded state can be accomplished by setting a torsion spring 22 on the front wheel assembly 2.

[0031] Preferably, in order to enable the unlock button 41 to be positioned above the base plate 1 so that the user can quickly unlock the locking component 4 at any time, the base plate 1 is provided with an unlock groove 11, and the bottom of the unlock groove 11 is also provided with a fully penetrating connecting groove 111, and the unlock button 41 can slide within the unlock groove 11.

[0032] Reference Figure 5 As shown, the locking part 42 also includes a round rod bracket 422 and a limiting shell 423. The round rod 421 is fixedly mounted on the round rod bracket 422. The unlocking button 41 is connected to the round rod bracket 422 through the connecting groove 111. The limiting shell 423 has a limiting groove 4231. Both ends of the round rod 421 can pass through the limiting shell 423 and slide in the limiting groove 4231. This setting can limit the pressing depth of the unlocking button 41 and prevent excessive pressing from damaging the elastic component 43. At the same time, the limiting shell 423 completely covers the round rod bracket 422 and the limiting plate 34, which can also reduce the risk of children accidentally pressing and pinching their fingers.

[0033] Reference Figure 6 As shown, specifically, in order to enable the front wheel assembly 2 to be driven by the armrest assembly 3, the front wheel assembly 2 is provided with a contact surface 21 on the side near the armrest assembly 3. The outer edge of the contact surface 21 is arc-shaped. When the drive tube 32 rotates, it can contact the contact surface 21 and move along its arc-shaped outer edge, thereby driving the front wheel assembly 2 to rotate to the unfolded state.

[0034] Reference Figure 6 The front wheel assembly 2 shown is equipped with a torsion spring 22 at its rotation axis. The torsion spring 22 drives the front wheel assembly 2 to rotate in the retracted state. The armrest assembly 3 supports the contact surface 21 of the front wheel assembly 2 through its drive tube 32 and arc-shaped transition portion 311 to maintain the front wheel assembly 2 in the extended state. In the pushing state, the contact surface 21 contacts both the drive tube 32 and the arc-shaped transition portion 311. In the pulling state, the contact surface 21 contacts the arc-shaped transition portion 311. If the armrest assembly 3 consists only of the connecting tube 31, in the pulling state (when the armrest assembly 3 is at a 180° angle to the base plate 1), the connecting tube 31 may not be able to maintain effective contact with the contact surface 21 of the front wheel assembly 2, and the front wheel assembly 2 will spring back to the retracted state under the action of the torsion spring 22. This application ensures that the arc-shaped transition portion 311 can still effectively support the contact surface 21 in the pulling state by setting the drive tube 32.

[0035] Preferably, to ensure the front wheel assembly 2 remains relatively stable in its stowed state, a support column 12 is fixedly provided on the base plate 1. The support column 12 supports the front wheel assembly 2 on one side when it is stowed, allowing the front wheel assembly 2 to be parallel to the ground. Various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A novel folding trolley, characterized in that, include: Base plate; The front wheel assembly is rotatably mounted at the bottom of the front end of the base plate; The handrail assembly is rotatably mounted at the front end of the base plate; A locking component is provided at the bottom of the base plate. The locking component includes an unlock button and a locking part. The unlock button is provided on the base plate through an elastic member and is fixedly connected to the locking part located below the base plate. The elastic member can drive the locking part to lock at least two angles between the handrail assembly and the base plate, so as to switch between push cart state and pull cart state and complete the locking.

2. The novel folding trolley according to claim 1, characterized in that, The armrest assembly has two connecting tubes, the ends of which form arc-shaped transition portions, and a drive tube parallel to the connecting tubes is provided at the end of the arc-shaped transition portions. When the folding trolley is in the folded state, the front wheel assembly is in the stowed state. When the folding trolley is in the pulling or pushing state, the front wheel assembly is in the unfolded state and remains perpendicular to the base plate.

3. A novel folding trolley according to claim 2, characterized in that, A crossbar is fixedly installed between the drive tubes, and the handrail assembly is rotatably mounted at the front end of the base plate via the crossbar.

4. A novel folding trolley according to claim 3, characterized in that, The crossbar passes through the locking assembly, and a limiting plate is fixedly installed on the crossbar. The limiting plate has two notches that correspond to the pushing state and the pulling state, respectively. The locking part includes a round rod that can be inserted into the notch.

5. A novel folding trolley according to claim 4, characterized in that, The base plate has an unlocking groove, and the bottom of the unlocking groove also has a fully penetrating connecting groove, and the unlocking button can slide within the unlocking groove.

6. A novel folding trolley according to claim 5, characterized in that, The locking part also includes a round rod bracket and a limiting shell. The round rod is fixedly mounted on the round rod bracket. The unlocking button is connected to the round rod bracket through a connecting groove. A limiting groove is provided on the limiting shell. Both ends of the round rod can pass through the limiting shell and slide in the limiting groove.

7. A novel folding trolley according to claim 2, characterized in that, The front wheel assembly has a contact surface on the side near the armrest assembly. The outer edge of the contact surface is arc-shaped. When the drive tube rotates, it can contact the contact surface and move along its arc-shaped outer edge, thereby driving the front wheel assembly to rotate into the unfolded state.

8. A novel folding trolley according to claim 7, characterized in that, The front wheel assembly is equipped with a torsion spring at its rotation axis. The torsion spring can drive the front wheel assembly to rotate in the retracted state. The armrest assembly can support the contact surface of the front wheel assembly through its drive tube and arc-shaped transition section to maintain the front wheel assembly in the unfolded state. In the push state, the contact surface is in contact with both the drive tube and the arc-shaped transition section. In the pull state, the contact surface is in contact with the arc-shaped transition section.

9. A novel folding trolley according to claim 1, characterized in that, A support column is fixedly installed on the base plate. The support column can support the front wheel assembly on one side when the front wheel assembly is folded up, so that the front wheel assembly can be parallel to the ground.

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