A folding handrail assembly

Abstract

The application discloses a folding handrail rod assembly which comprises a hinged joint, two upper surrounding rods and two lower surrounding rods. The left and right parts of the hinged joint are provided with openings. The hinged joint is provided with two groups of first guide grooves and a group of strip-shaped holes. Each first guide groove comprises an inclined groove and a horizontal groove which is communicated with the top of the inclined groove. A first shaft rod is arranged in each group of first guide grooves. The first shaft rod passes through one end of the upper surrounding rod. One end of the lower surrounding rod is hinged in the opening. Two connecting rods are arranged in the hinged joint. One group of strip-shaped holes is composed of two strip-shaped holes which are arranged in front and back. A second shaft rod is arranged between the two strip-shaped holes. The second shaft rod passes through the top of the two connecting rods. Each connecting rod corresponds to one lower surrounding rod. The bottom of the connecting rod is hinged with one end of the lower surrounding rod. In the folding process, the two connecting rods move along with the two lower surrounding rods respectively. Meanwhile, the second shaft rod moves downward along the strip-shaped hole, so that the upper and lower surrounding rods can be folded synchronously.

Description

Technical Field

[0001] This utility model relates to the field of children's furniture, specifically to a foldable armrest assembly. Background Technology

[0002] Baby playpens not only ensure a baby's safety while sleeping but also provide a safe play space as the baby grows. The armrest assembly is a crucial component of a baby playpens. Currently, patent CN223183250U discloses a simple folding arm assembly for a playpens, including a hinge joint and two upper armrests. The two upper armrests are symmetrically arranged. The left and right sides of the hinge joint have openings, within which guide sleeves are hinged. One end of each upper armrest passes through the guide sleeve. The hinge joint has two sets of guide grooves, each corresponding to one upper armrest. Each set of guide grooves consists of two guide grooves arranged front and rear. Each guide groove includes an inclined groove and a transverse groove communicating with the top of the inclined groove. A first shaft passes through each set of guide grooves, extending through the upper armrests. The playpens also include two lower armrests, symmetrically arranged, with one end of each lower armrest hinged within an opening.

[0003] In the aforementioned disclosed patent, when the play bed is folded, the two upper and two lower frame rods fold, and the hinge joints move downwards as the upper and lower frame rods fold. Similarly, when the play bed is to be unfolded, the hinge joints are lifted, and the two upper and two lower frame rods unfold accordingly. However, in the aforementioned disclosed patent, the two upper and two lower frame rods often fail to descend synchronously when folding, which prevents the folding rod assembly from folding smoothly. Utility Model Content

[0004] This utility model provides a foldable armrest assembly, the main purpose of which is to overcome the problem that the upper and lower armrests of the existing play bed folding arm assembly cannot descend synchronously when folding, resulting in an unsmooth folding of the folding arm assembly.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A smoothly folding handrail assembly includes a hinge joint, two symmetrical upper rails, and two lower rails. The hinge joint has openings on both its left and right sides. Each hinge joint has two sets of first guide grooves and one set of strip-shaped holes. Each set of first guide grooves corresponds to one upper rail. Each set of first guide grooves consists of two first guide grooves arranged front to back. Each first guide groove includes an inclined groove and a transverse groove communicating with the top of the inclined groove. A first shaft passes through each set of first guide grooves, passing through one end of the upper rail. One end of the lower rail is hinged to an opening. The hinge joint has two connecting rods. One set of strip-shaped holes consists of two vertically arranged strip-shaped holes arranged front to back. A second shaft passes between the two strip-shaped holes, passing through the tops of the two connecting rods. Each connecting rod corresponds to one lower rail, and the bottom of the connecting rod is hinged to one end of the lower rail.

[0006] Furthermore, one end of the upper circumferential rod is provided with a clearance cut to make way for the upper part of the connecting rod.

[0007] Furthermore, the two connecting rods are symmetrical in structure and arranged front to back.

[0008] Furthermore, the hinge joint is provided with two bushings, each bushing corresponding to a connecting rod. One bushing is located on the front side of the connecting rod arranged in front, and the other bushing is located on the rear side of the connecting rod arranged in back. The second shaft passes through the two bushings.

[0009] Furthermore, one end of the lower ring rod is provided with a connector, the connector is hinged to the opening via a third shaft, one end of the connector is provided with a connecting part, and the bottom of the linkage rod is hinged to the connecting part via a fourth shaft.

[0010] Furthermore, the other end of the connector is provided with a plug tube, which is located inside one end of the lower enclosure rod, and one end of the lower enclosure rod and the plug tube are connected by a fifth shaft.

[0011] Furthermore, the hinge joint is provided with two sets of second guide grooves, each set of second guide grooves corresponds to an upper ring rod, each set of second guide grooves consists of two second guide grooves arranged front to back and laterally, and a sixth shaft rod passes through each set of second guide grooves, the sixth shaft rod passing through one end of the upper ring rod.

[0012] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages: When the play bed is in use, the two upper rails and the two lower rails are in the unfolded state, and the first axle is located in the transverse groove; when the play bed is folded, the first axle will disengage from the transverse groove and fall into the inclined groove. At this time, the hinge joint moves downward. As the play bed folds, the two upper rails and the two lower rails gradually fold together. The hinge joint continues to descend. During the folding process, the two connecting rods move with the two lower rails respectively. At the same time, the second axle moves downward along the strip hole, so that the two lower rails fold synchronously. Since the upper rails and lower rails on the same side are connected to the same connecting joint of the play bed, the two lower rails drive the two upper rails to fold synchronously when folding synchronously, making the armrest assembly fold more smoothly. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the present invention.

[0014] Figure 2 This is a structural diagram of the present invention from another angle.

[0015] Figure 3 This is a partial exploded view of the structure of this utility model.

[0016] Figure 4 for Figure 3 A further structural decomposition diagram.

[0017] Figure 5 This is a diagram showing the state of the present invention when folded. Detailed Implementation

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Reference Figures 1 to 4 A smoothly folding handrail assembly includes a hinge joint 1, two symmetrical upper rails 2, and two lower rails 3. The hinge joint 1 has openings 4 on both its left and right sides. The hinge joint 1 has two sets of first guide grooves 5 and a set of strip holes 6. Each set of first guide grooves 5 corresponds to one upper rail 2. Each set of first guide grooves 5 consists of two first guide grooves arranged front to back. Each first guide groove 5 includes an inclined groove 51 and a transverse groove 52 communicating with the top of the inclined groove 51. A first shaft 7 passes through each set of first guide grooves 5, and the first shaft 7 passes through one end of the upper rail 2. One end of the lower band 3 is hinged to the opening 4. The hinge joint 1 is provided with two connecting rods 8. A set of strip holes 6 consists of two vertically arranged strip holes 6 arranged front to back. A second shaft 9 passes through the two strip holes 6. The second shaft 9 passes through the top of the two connecting rods 8. Each connecting rod 8 corresponds to one lower band 3. The bottom of the connecting rod 8 is hinged to one end of the lower band 3. One end of the upper band 2 is provided with a clearance cut 10 to make way for the upper part of the connecting rod 8.

[0022] Reference Figures 2 to 4 The two connecting rods 8 are symmetrically arranged and positioned one in front of the other. The hinge joint 1 contains two bushings 11, each corresponding to one connecting rod 8. One bushing 11 is located in front of the connecting rod 8 positioned in front, and the other bushing 11 is located behind the connecting rod 8 positioned behind. The second shaft 9 passes through both bushings 11. The two bushings 11 are used to eliminate the gaps between the two connecting rods 8 and the inner wall of the hinge joint 1.

[0023] Reference Figures 2 to 4 One end of the lower surrounding rod 3 is provided with a connector 12, which is hinged to the opening 4 via a third shaft 13. One end of the connector 12 is provided with a connecting part 14, and the bottom of the connecting rod 8 is hinged to the connecting part 14 via a fourth shaft 15. The other end of the connector 12 is provided with a plug tube 16, which is located inside one end of the lower surrounding rod 3. One end of the lower surrounding rod 3 and the plug tube 16 are connected via a fifth shaft 17.

[0024] Reference Figures 1 to 5 When the lower enclosure rod 3 is folded and unfolded, the connecting rod 8 can move with the lower enclosure rod 3, and the connecting rod 8 can drive the second shaft 9 to move up and down along the strip hole 6. When the lower enclosure rod 3 is unfolded, the second shaft 9 is located at the top of the strip hole 6; when the lower enclosure rod 3 is folded, the second shaft 9 moves downward along the strip hole 6.

[0025] Reference Figure 1 , Figure 3 and Figure 4 The hinge joint 1 is provided with two sets of second guide grooves 18, each set of second guide grooves 18 corresponding to an upper guide rod 2. Each set of second guide grooves 18 consists of two second guide grooves 18 arranged front to back and laterally. A sixth shaft 19 passes through each set of second guide grooves 18, and the sixth shaft 19 passes through one end of the upper guide rod 2. When the upper guide rod 2 is unfolded, the sixth shaft 19 is located at the end of the second guide groove 18 closer to the first guide groove 5; when the upper guide rod 2 is folded, the sixth shaft 19 moves toward the end of the second guide groove 18 away from the first guide groove 5.

[0026] Reference Figures 1 to 5 The design principle of this utility model is as follows: When the play bed is in use, the two upper rails 2 and the two lower rails 3 are in the unfolded state, and the first axle 7 is located in the transverse groove 52; when the play bed is folded, the first axle 7 will disengage from the transverse groove 52 and fall into the inclined groove 51. At this time, the hinge joint 1 moves downward. As the play bed folds, the two upper rails 2 and the two lower rails 3 gradually fold together. The hinge joint 1 continues to descend. During the folding process of the two lower rails 3, the two connecting rods 8 move with the two lower rails 3 respectively. At the same time, the second axle 9 moves downward along the strip hole 6, so that the two lower rails 3 fold synchronously. Since the upper rails 2 and the lower rails 3 on the same side are connected to the same connecting joint 20 of the play bed, the two lower rails 3 drive the two upper rails 2 to fold synchronously when folding synchronously, making the armrest assembly fold more smoothly.

[0027] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A smoothly folding handrail assembly, characterized in that: The device includes a hinge joint, two symmetrical upper rods, and two lower rods. The hinge joint has openings on both its left and right sides. Each hinge joint has two sets of first guide grooves and one set of strip-shaped holes. Each set of first guide grooves corresponds to one upper rod. Each set of first guide grooves consists of two first guide grooves arranged front to back. Each first guide groove includes an inclined groove and a transverse groove communicating with the top of the inclined groove. A first shaft passes through each set of first guide grooves, passing through one end of the upper rod. One end of the lower rod is hinged to the opening. The hinge joint has two connecting rods. One set of strip-shaped holes consists of two vertically arranged strip-shaped holes arranged front to back. A second shaft passes between the two strip-shaped holes, passing through the tops of the two connecting rods. Each connecting rod corresponds to one lower rod, and the bottom of the connecting rod is hinged to one end of the lower rod.

2. The smoothly folding handrail assembly as described in claim 1, characterized in that: One end of the upper rod is provided with a clearance cut to make way for the upper part of the connecting rod.

3. The smoothly folding handrail assembly as described in claim 1, characterized in that: The two connecting rods are symmetrical in structure and arranged front to back.

4. The smoothly folding handrail assembly as described in claim 3, characterized in that: The hinge joint is provided with two bushings, each bushing corresponding to a connecting rod. One bushing is located in front of the connecting rod that is arranged in front, and the other bushing is located in rear of the connecting rod that is arranged in rear. The second shaft passes through the two bushings.

5. The smoothly folding handrail assembly as described in claim 1, characterized in that: One end of the lower rod is provided with a connector, which is hinged to the opening via a third shaft. One end of the connector is provided with a connecting part, and the bottom of the linkage rod is hinged to the connecting part via a fourth shaft.

6. The smoothly folding handrail assembly as described in claim 5, characterized in that: The other end of the connector is provided with a plug tube, which is located inside one end of the lower enclosure rod. One end of the lower enclosure rod and the plug tube are connected by a fifth shaft.

7. The smoothly folding handrail assembly as described in claim 1, characterized in that: The hinge joint is provided with two sets of second guide grooves, each set of second guide grooves corresponds to an upper rod, and each set of second guide grooves consists of two second guide grooves arranged front and back and laterally. A sixth shaft is passed through each set of second guide grooves, and the sixth shaft passes through one end of the upper rod.

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