Child trailer four-way plastic part

Abstract

The utility model relates to children's travelling tool accessory technical field, especially a children's trailer four -way plastic part, including first connecting mouth, second connecting mouth and third connecting mouth, second connecting mouth and third connecting mouth are along horizontal direction setting and are in same straight line, first connecting mouth extends upwards according to preset angle, respectively be used for connecting trailer's horizontal support pipe, longitudinal support pipe and handle push rod, the hollow cylinder of coaxial forming is equipped in first connecting mouth, the outer periphery of hollow cylinder is connected sector rib board through film formula elastic hinging structure, sector rib board occurs elastic deflection when pipe material inserts, provides controllable resilience, is used for realizing insertion depth limit, the outer wall of first connecting mouth is equipped with annular arc boss, forms protection ring around outside sector rib board, promotes plug -in guide nature and avoids lateral wall scratch, this structure can effectively replace traditional diameter sudden contraction type limit structure, promotes assembly smoothness and structural adaptability.

Description

Technical Field

[0001] This utility model relates to the technical field of accessories for children's travel tools, and in particular to a four-way plastic part for a children's trailer. Background Technology

[0002] Child trailers, as common travel aids for infants and toddlers, typically use tubing to construct their frame structure. To facilitate the assembly, disassembly, folding, and transportation of the frame, detachable connection structures are often installed at the tubing joints. Among these, the four-way connector, serving as the connection node between the transverse support tubes, longitudinal support tubes, and the handle push rod, is widely made of injection-molded plastic and achieves connection through insertion with the tubing.

[0003] In existing technologies, four-way connectors generally employ a diameter-reduction limiting structure, which involves creating a physical limiting step inside the connector opening through a localized protrusion or a sudden diameter reduction section to control the insertion depth of the pipe. While this type of structure is simple to form, it has the following drawbacks:

[0004] 1. The diameter abrupt reduction structure creates forced interference with the pipe during insertion. If the pipe wall is thin or the material is too soft, it can easily lead to deformation, cracking or wear of the pipe end, affecting assembly accuracy and structural stability.

[0005] 2. During actual insertion, issues such as "getting stuck" or "not being fully inserted" can easily occur, resulting in a poor user assembly experience;

[0006] 3. It is difficult to adapt to different pipe tolerances, and poor assembly is prone to occur, such as loosening or being too tight. Summary of the Invention

[0007] The purpose of this utility model is to provide a four-way plastic part for a child trailer to solve the problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a four-way plastic part for a child trailer, including a first connecting port, a second connecting port, a slot, a fastening port, a third connecting port, a hollow cylinder, a fan-shaped rib, and an arc-shaped boss. The second connecting port and the third connecting port are arranged in the horizontal direction and are on the same straight line. The first connecting port extends upward from one side of the straight line at a preset angle and is used to connect the trailer's transverse support tube, longitudinal support tube, and handle push rod respectively.

[0009] According to the above technical solution, the end of each connection port is provided with a socket that matches the outer diameter of the corresponding pipe, forming a detachable connection when inserted; the inner wall of each connection port is provided with an embedded slot for forming an insertion limit, so as to realize the positioning of the pipe.

[0010] According to the above technical solution, each connection port has a threaded fastening port on its outer wall, which facilitates the use of screw-type fasteners to fix the pipe, thereby improving the structural strength and pull-out resistance.

[0011] According to the above technical solution, an integrally formed hollow cylinder coaxial with its inner wall is provided in the center of the inner cavity of the first connection port. The hollow cylinder is made of flexible material and has a certain elastic recovery capability.

[0012] According to the above technical solution, the outer periphery of the hollow cylinder is connected to multiple radially distributed fan-shaped ribs through a thin-film elastic hinge structure. The top of the fan-shaped ribs is slightly tapered toward the tube insertion direction so as to elastically flex and provide a rebound limiting function when the tube is inserted.

[0013] According to the above technical solution, the outer wall of the first connection port is provided with an annular arc boss. The arc boss surrounds the outer three sides of the fan-shaped rib to form a rigid protective ring and forms a guide surface in its circumference to avoid the pipe directly contacting and scraping the inner wall of the connector when it is inserted.

[0014] According to the above technical solution, the four-way plastic part is injection molded from polypropylene (PP) material, and the hollow cylinder and fan-shaped rib are made of thermoplastic elastomer (TPE) or polyethylene (PE) to improve structural flexibility and insertion smoothness.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0016] 1. By setting a hollow cylinder and its elastically connected fan-shaped rib structure in the first connection port to replace the traditional diameter abrupt shrinkage limiting method, not only is the insertion difficulty and tube deformation caused by the sudden shrinkage of the inner cavity avoided, but also flexible contact and progressive limiting are provided during the insertion process, improving the smoothness and stability of the insertion process.

[0017] 2. The four-way plastic parts adopt a dual connection method of slot and threaded fastening port, which can realize quick plug-in and plug-out assembly while providing higher resistance to pull-out. It is suitable for pipes with different wall thicknesses and different stiffnesses, thus improving versatility.

[0018] 3. The arc-shaped boss structure is surrounded on three sides around the external fan-shaped ribs, forming an effective protective ring. During assembly, it plays multiple functions such as guiding, buffering and preventing scratches, protecting the connection parts from external impacts and improving overall durability and service life. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a four-way plastic component for a children's trailer proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of a four-way plastic component for a children's trailer from another angle, as proposed in this utility model.

[0022] Figure 3 This is a top view of a four-way plastic part for a children's trailer proposed in this utility model.

[0023] In the figure: 1 First connection port, 2 Second connection port, 3 Slot, 4 Fastening port, 5 Third connection port, 6 Hollow cylinder, 7 Fan-shaped rib, 8 Arc boss. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0025] A four-way plastic part for a child trailer, the four-way plastic part is composed of a first connecting port 1, a second connecting port 2 and a third connecting port 5. The third connecting port 5 and the second connecting port 2 are arranged in a straight line along the horizontal direction. The first connecting port 1 extends upward from one side of the above straight line at a preset angle and is used to connect the trailer's transverse support tube, longitudinal support tube and handle push rod respectively. Each connecting port end is provided with an opening that matches the outer diameter of the tube, forming a detachable connection when inserted. Each connecting port is provided with an embedded groove 3, which is used to form a limiting fit with the outer wall of the tube during the insertion process. Each connecting port outer wall is provided with a threaded fastening port 4 for installing fasteners.

[0026] The hollow cylinder 6 is located in the center of the inner cavity of the first connecting port 1 and is integrally formed coaxially with the inner wall. The outer periphery of the hollow cylinder 6 is fixedly connected to the fan-shaped rib 7 through a thin-film elastic hinge structure. The top of the fan-shaped rib 7 is slightly tapered towards the direction of pipe insertion. When the pipe is inserted, the fan-shaped rib 7 undergoes elastic flexing, and its thin root area provides controllable rebound force. The slot 3 corresponds to the fan-shaped rib 7 in the axial position, further enhancing the axial limiting function of the slot 3.

[0027] A ring-shaped arc-shaped boss 8 is provided at a corresponding position on the outer wall of the first connecting port 1. The arc-shaped boss 8 surrounds the outer three sides of the outer fan-shaped rib plate 7, forming a rigid protective ring. The boss forms a smooth guide surface in the circumferential direction, so that when the pipe slides in along the boss, it always maintains a gap with the side wall of the four-way plastic part, avoiding the pipe from directly scraping the side wall of the connector. The arc-shaped boss 8 has a continuous structure in the circumferential direction, and its outer surface mates with the pipe to form a guide surface, which is used to assist in the centering and guiding of the pipe during the insertion process.

[0028] More specifically, the hollow cylinder 6 inside the first connection port 1 and its radially distributed fan-shaped ribs 7 are not used to bear a large range of radial clamping loads, but are used as an insertion depth limiting mechanism. When the pipe is inserted from the end face of the connection port, the outer wall of the pipe first contacts the top of the fan-shaped ribs 7, and a slight deformation is generated in the elastic flexure area at the root of the rib, thereby forming a slight friction stop, so that the pipe stops advancing at the predetermined position, thereby avoiding damage to the hardness and wall thickness of the pipe caused by the traditional diameter abrupt reduction limiting structure.

[0029] This utility model has a simple structure, compact shape, and low manufacturing cost, and is widely applicable to lightweight structural components of various children's trailers, strollers, balance bikes, etc.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A four-way plastic part for a child trailer, characterized in that, It includes a first connection port (1), a second connection port (2) and a third connection port (5). The second connection port (2) and the third connection port (5) are set in the horizontal direction and are on the same straight line. The first connection port (1) extends upward from one side of the straight line at a preset angle and connects to the lateral support tube, longitudinal support tube and handle push rod of the trailer respectively. Each connection port has an opening at its end that matches the outer diameter of the pipe, forming a detachable connection when inserted. Each connection port has a groove (3) inside, and each connection port has a threaded fastening port (4) on its outer wall for installing fasteners. The first connection port (1) has a hollow cylinder (6) formed coaxially with the inner wall in the center of the inner cavity. The outer periphery of the hollow cylinder (6) is connected by a multi-radial fan-shaped rib (7) through a thin film elastic hinge structure. The top of the fan-shaped rib (7) is slightly tapered towards the direction of pipe insertion. During insertion, it undergoes elastic flexing to provide a rebound limiting effect. The outer wall of the first connection port (1) is provided with an annular arc boss (8). The arc boss (8) surrounds the three sides of the outer side of the fan-shaped rib (7) to form a rigid protective ring and forms a smooth guide surface in the circumferential direction.

2. The four-way plastic part for a child trailer according to claim 1, characterized in that: The slot (3) corresponds to the fan-shaped rib (7) in the axial position.

3. The four-way plastic part for a child trailer according to claim 1, characterized in that: The circular arc boss (8) has a continuous structure in the circumferential direction, and its outer surface cooperates with the pipe to form a guide surface, which is used to assist in the centering and insertion of the pipe during the insertion process.

4. The four-way plastic part for a child trailer according to claim 1, characterized in that: The preset included angle of the first connection port (1) is 60° to 75°.

5. A four-way plastic part for a child trailer according to claim 1, characterized in that: The threaded fastening port (4) is a screw through hole structure, distributed on both sides of the outer wall of the connection port.

6. The four-way plastic part for a child trailer according to claim 1, characterized in that: The slot (3) is integrally injection molded from rigid polypropylene material and the connector body, and its edge is provided with a micro-protrusion structure to enhance the axial positioning stability of the insertion tube.

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