Double-rod folding handrail assembly

Abstract

The utility model relates to the technical field of handrails, and discloses a double-rod folding handrail assembly which comprises a frame body, installation frames, a main handrail and a secondary handrail are arranged on the two sides of the frame body, a first sliding groove is formed in the main handrail, the first sliding groove is in sliding fit with a third pin shaft, and two third sliding grooves are symmetrically formed in the frame body. A positioning groove is formed in one side of the third sliding groove in a communicating mode, a fifth pin shaft is installed on the main handrail, the fifth pin shaft can be separated from the positioning groove in a sliding mode and slide in the third sliding groove, a sixth pin shaft is installed on the secondary handrail, an auxiliary rod is installed on the fifth pin shaft in a hinged mode, a second sliding groove is formed in the auxiliary rod, and the sixth pin shaft is in sliding fit with the second sliding groove. During use, the whole handrail is more stable in structure through the auxiliary rod structure, another quadrilateral structure framework is constructed between the auxiliary rod and the main handrail and between the auxiliary rod and the secondary handrail, relative displacement of the main handrail and the secondary handrail is effectively limited, and the dislocation risk between components is eliminated.

Description

Technical Field

[0001] This utility model relates to the field of railing technology, and in particular to a double-bar folding railing assembly. Background Technology

[0002] Folding tables are designed for babies aged 0 to 6 years old, aiming to provide them with a safe and comfortable space for play and short rests. They can also be folded up for easy carrying when going out. The folding frame is an important part of the folding table. Existing folding frames usually meet different folding needs through the folding of railings.

[0003] The current folding mechanism of the folding frame is just two rails connected by a pin. When this linkage mechanism is in use, the stability is inconsistent and misalignment is prone to occur, which can cause the folding mechanism to fail and greatly reduce the smoothness of folding and unfolding. Utility Model Content

[0004] The main purpose of this utility model is to provide a double-bar folding railing assembly, which can effectively solve the problem of poor railing stability in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A double-bar folding railing assembly includes a frame, with mounting frames and main railings on both sides of the frame. One end of the main railing is hinged to the frame via a third pin, and the other end of the main railing is hinged to the mounting frame via a first pin.

[0007] The main railing is provided with a first sliding groove, which slides in conjunction with a third pin. The frame is provided with two symmetrically arranged third sliding grooves, and a positioning groove is provided on one side of each third sliding groove.

[0008] Furthermore, it also includes a secondary railing, one end of which is hinged to the frame via a fourth pin, and the other end of which is hinged to the mounting frame via a second pin. A fifth pin is installed on the main railing, and the fifth pin can slide out of the positioning groove and slide in the third sliding groove.

[0009] Furthermore, a sixth pin is installed on the secondary railing, and an auxiliary rod is hinged to the fifth pin. A second sliding groove is provided on the auxiliary rod, and the sixth pin slides in conjunction with the second sliding groove.

[0010] Furthermore, the first, second, third, and fourth pins form an approximately parallelogram-shaped area, with each main railing and its corresponding secondary railing arranged horizontally.

[0011] Furthermore, a support column is installed on the mounting bracket, and the positioning groove is arranged horizontally.

[0012] Furthermore, the frame is provided with several weight-reducing grooves.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In use, this utility model enhances the overall stability of the railing through the auxiliary rod structure. The auxiliary rod, along with the main and secondary railings, forms another quadrilateral structure, effectively limiting the relative displacement of the main and secondary railings and eliminating the risk of misalignment between components. Regarding motion performance, the auxiliary rod acts as a linkage device, forming a mechanical transmission system that ensures the main and secondary railings rotate synchronously during folding, significantly improving the smoothness of the movement trajectory. This dual technical feature not only strengthens the rigid support of the overall structure but also optimizes the kinematic performance of the folding mechanism. Ultimately, this allows the railing device to achieve smooth, jam-free folding operation while maintaining structural stability, achieving a harmonious balance between stability and ease of operation.

[0015] 2. In the unfolded state, the positioning groove and the corresponding component form a geometric self-locking mechanism. By constructing a two-way constraint mechanism, a rigid support surface is formed in the vertical direction and a displacement limiting interface is established in the horizontal direction, thereby effectively eliminating the free gap after the folding mechanism is unfolded. The engineering mechanics design of the positioning groove enables the main and secondary railings to form a stable three-point support system in the unfolded state, which not only significantly improves the resistance to lateral loads, but also reduces the stress concentration at the component connection through the optimization of pre-tightening force distribution, ensuring the operational reliability of the folding and unfolding dual-state conversion.

[0016] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the double-bar folding railing assembly of this utility model.

[0018] Figure 2 This utility model relates to a double-bar folding railing assembly. Figure 1 Another structural diagram.

[0019] Figure 3 This is a schematic diagram of the structure of the double-bar folding railing assembly of this utility model when it is supported.

[0020] Figure 4 This is a schematic diagram of the double-bar folding railing assembly of this utility model when folded.

[0021] Figure 5 This is a schematic diagram of the folded structure of the double-bar folding railing assembly of this utility model.

[0022] Figure 6 This is a schematic diagram showing the opening positions of the first sliding groove and the second sliding groove of the double-bar folding railing assembly of this utility model.

[0023] Figure 7 This is a schematic diagram showing the opening positions of the first and second sliding grooves in another structure of the double-bar folding railing assembly of this utility model.

[0024] Figure 8 This is an exploded view of the double-bar folding railing assembly of this utility model.

[0025] Figure 9 This is an enlarged view of the frame of this utility model.

[0026] In the diagram: 101, frame; 102, main railing; 103, secondary railing; 104, mounting frame; 105, support column; 106, first pin; 107, second pin; 108, third pin; 1081, first sliding groove; 109, fourth pin; 110, third sliding groove; 111, positioning groove; 112, auxiliary rod; 113, fifth pin; 114, sixth pin; 1141, second sliding groove. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] like Figure 1-9 As shown, the double-bar folding railing assembly has mounting frames 104, main railings 102, and secondary railings 103 on both sides of the frame 101. One end of the main railing 102 is hinged to the frame 101 via a third pin 108, and the other end of the main railing 102 is hinged to the mounting frame 104 via a first pin 106. One end of the secondary railing 103 is hinged to the frame 101 via a fourth pin 109, and the other end of the secondary railing 103 is hinged to the mounting frame 104 via a second pin 107. The first pin 106, the second pin 107, the third pin 108, and the fourth pin 109 form an approximately parallelogram area. Each main railing 102 and the corresponding secondary railing 103 are arranged horizontally and vertically.

[0029] The main railing 102 has a first sliding groove 1081, which slides with the third pin 108. A support column 105 is installed on the mounting frame 104. The frame 101 has two symmetrically arranged third sliding grooves 110. A positioning groove 111 is connected to one side of the third sliding groove 110. The positioning groove 111 is arranged horizontally. A fifth pin 113 is installed on the main railing 102. The fifth pin 113 can slide in the third sliding groove 110 without the positioning groove 111. The third pin 108 passes through the frame 101 and slides with the first sliding groove 1081. Since the third pin 108 is fixed by the frame 101, the torsion that occurs during folding can be further reduced, making folding smoother and less prone to misalignment or jamming.

[0030] Furthermore, the third sliding groove 110 is not limited to linear, but can also be, for example... Figure 9 The arc-shaped structure shown.

[0031] A sixth pin 114 is installed on the secondary railing 103, and an auxiliary rod 112 is hinged to the fifth pin 113. A second sliding groove 1141 is provided on the auxiliary rod 112, and the sixth pin 114 slides in cooperation with the second sliding groove 1141.

[0032] This utility model is in the unfolding condition. Figure 3 The positioning groove 111 forms a geometric self-locking mechanism with the corresponding component. By constructing a two-way constraint mechanism, and referring to... Figure 7 When the third pin 108 is engaged in the positioning groove 111, a rigid support surface is formed in the vertical direction and a displacement limiting interface is established in the horizontal direction, thereby effectively eliminating the free gap after the folding mechanism is unfolded. The engineering mechanical design of the positioning groove 111 enables the main and secondary railings 103 to form a stable three-point support system in the unfolded state, which not only significantly improves the ability to resist lateral loads, but also reduces the stress concentration at the component connection through the optimization of pre-tightening force distribution, ensuring the operational reliability of the folding and unfolding dual-state conversion.

[0033] Specifically, the main railing 102, secondary railing 103, frame 101, and mounting bracket 104 form a parallel deformable structure, which enables linkage between the main railing 102 and secondary railing 103. In use, the auxiliary rod 112 structure further stabilizes the overall railing structure. The auxiliary rod 112, along with the main railing 102 and secondary railing 103, forms another quadrilateral structure, effectively limiting the relative displacement of the main railing 102 and secondary railing 103 and eliminating the risk of misalignment between components. In terms of motion performance, the auxiliary rod 112 acts as a linkage device, forming a mechanical transmission system that ensures the main and secondary railings 103 rotate synchronously during folding, significantly improving the smoothness of the movement trajectory. This dual technical feature not only enhances the rigidity of the overall structure but also optimizes the kinematic performance of the folding mechanism, ultimately enabling the railing device to achieve smooth, jam-free folding operation while maintaining structural stability, achieving a harmonious balance between stability and ease of operation.

[0034] When this utility model is folded, if the hand support column 105 is bent inward, since the secondary railing 103 is fixed, the first pin 106 on the main railing 102 will move in a circular motion around the second pin 107 as the axis. This will cause the first pin 106 to drive the main railing 102 to move outward until the fifth pin 113 disengages from the positioning groove 111. The fifth pin 113 then slides downward along the third sliding groove 110 (see reference). Figure 2 and Figure 4 Until the secondary railing 103, the main railing 102, and the support column 105 are all vertical and joined together, the fifth pin 113 slides down along the third sliding groove 110 to the bottom (see reference). Figure 5 At this point, the folding is complete. When it needs to be unfolded, hold the two support columns 105 and pull them in opposite directions, so that the angle between the secondary railing 103 and the support column 105 increases, the main railing 102 and the secondary railing 103 gradually become horizontal, and the fifth pin 113 slides upward along the third sliding groove 110 until it is locked into the positioning groove 111. When the unfolding is complete, the main railing 102 and the secondary railing 103 are in a horizontal state, and the support column 105 is in a vertical state.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A double-pole folding railing assembly, characterized in that: The system includes a frame (101), with mounting brackets (104) and main railings (102) on both sides of the frame (101). One end of the main railing (102) is hinged to the frame (101) via a third pin (108), and the other end of the main railing (102) is hinged to the mounting bracket (104) via a first pin (106). The main railing (102) is provided with a first sliding groove (1081), which is slidably engaged with a third pin (108). The frame (101) is provided with two symmetrically arranged third sliding grooves (110). One side of the third sliding groove (110) is connected to a positioning groove (111). The positioning groove (111) and the main railing are penetrated by a fifth pin (113). The fifth pin (113) can slide in the third sliding groove (110) without disengaging from the positioning groove (111).

2. The double-bar folding railing assembly according to claim 1, characterized in that: It also includes a secondary railing (103), one end of which is hinged to the frame (101) via a fourth pin (109), and the other end of which is hinged to the mounting frame (104) via a second pin (107).

3. The double-bar folding railing assembly according to claim 2, characterized in that: A sixth pin (114) is installed on the secondary railing (103), and an auxiliary rod (112) is hinged on the fifth pin (113). A second sliding groove (1141) is provided on the auxiliary rod (112), and the sixth pin (114) slides in cooperation with the second sliding groove (1141).

4. The double-bar folding railing assembly according to claim 1, characterized in that: The first pin (106), the second pin (107), the third pin (108) and the fourth pin (109) form an approximately parallelogram area, and each main railing (102) and the corresponding secondary railing (103) are arranged horizontally and vertically.

5. The double-bar folding railing assembly according to claim 1, characterized in that: The mounting bracket (104) is fitted with a support column (105), and the positioning groove (111) is arranged horizontally.

6. The double-bar folding railing assembly according to claim 1, characterized in that: The frame (101) has several weight-reducing grooves.

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