Anti-shaking stretching assembly

Abstract

The utility model discloses an anti-shaking stretching assembly. The anti-shaking stretching assembly comprises a base rod, the base rod is provided with a seat mechanism, the seat mechanism comprises a front installation part and a rear installation part which are hinged to the base rod, the top of the front installation part is pivoted with a first front rotating part, the middle of the front installation part is pivoted with a second front rotating part, and the top of the rear installation part is pivoted with a rear rotating part. The rear rotating part and the first front rotating part are pivoted to the seat mounting plate and the side connecting rod part at the same time, the backrest mechanism is arranged between the seat mounting plate and the rear rotating part, the middle of the seat mounting plate is pivoted to the middle rotating part, the bottom end of the middle rotating part is pivoted to a transmission part connected with the leg mechanism, and the top end of the middle rotating part is pivoted to the top end of the second front rotating part. A first limiting pin is arranged in the middle of the second front rotating piece. A first limiting face is arranged on the front side of the side connecting rod piece. The backrest mechanism solves the problem that in the prior art, when the backrest mechanism is unfolded in a completely folded state, the backrest mechanism is prone to shaking, and therefore user experience and product quality are affected.

Description

Technical Field

[0001] The utility model relates to the field of home manufacturing, and particularly relates to an anti-shake extension assembly. Background Art

[0002] There is a Chinese utility model patent with the publication number CN215738008U and the name of "An extension assembly capable of achieving zero gravity", which realizes the switching between the sitting position, TV position and lying position of a movable sofa through the extension assemblies on both sides. However, when the extension assembly starts to switch from the sitting position to the TV position, the user's center of gravity will move backward, and the front side of the seat cushion will tilt upward, resulting in the backrest mechanism being prone to shaking, thus affecting the user experience and product quality. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide an anti-shake extension assembly that can eliminate the shaking phenomenon that is prone to occur when the extension assembly is unfolded, thereby improving the user experience and product quality.

[0004] To achieve the above purpose, the technical solution adopted by the anti-shake extension assembly of the utility model is as follows:

[0005] An anti-shake extension assembly includes a base rod, on which a seat mechanism is arranged. The seat mechanism includes a front mounting member and a rear mounting member hinged to the base rod. A front rotating member one is pivotally connected to the top of the front mounting member, a front rotating member two is pivotally connected to the middle of the front mounting member, a rear rotating member is pivotally connected to the top of the rear mounting member, and a seat mounting plate and a side link member are simultaneously pivotally connected between the rear rotating member and the front rotating member one. A backrest mechanism is arranged between the seat mounting plate and the rear rotating member. A middle rotating member is pivotally connected to the middle of the seat mounting plate. The bottom end of the middle rotating member is pivotally connected to a transmission member connected to the leg mechanism, and the top end of the middle rotating member is pivotally connected to the top end of the front rotating member two. A first limit pin is arranged in the middle of the front rotating member two, and a first limit surface is provided on the front side of the side link member for cooperating with the first limit pin.

[0006] Preferably, a second limit pin is arranged in the middle of the middle rotating member, and a second limit surface is provided on the rear side of the side link member for cooperating with the second limit pin.

[0007] Preferably, a first hanging pin is arranged at the rear of the seat mounting plate, a second hanging pin is arranged on the rear rotating member, and a tension spring is arranged between the first and second hanging pins.

[0008] Preferably, the leg mechanism includes a leg link one and a leg link two pivotally connected to the front side of the seat mounting plate. The rear side of the leg link one is pivotally connected to the transmission member. The front end of the leg link one is pivotally connected to a leg link three. The middle of the leg link three is pivotally connected to the leg link two. The front end of the leg link two is pivotally connected to a leg link four. The front ends of the leg link three and the leg link four are simultaneously pivotally connected to a footrest mounting plate.

[0009] Preferably, the backrest mechanism includes a backrest mounting plate pivotally connected to the rear side of the seat mounting plate. The backrest mounting plate is pivotally connected with a rear support rod, and the bottom of the rear support rod is pivotally connected with a rear rotating member.

[0010] Compared with the prior art, the present utility model has the following advantages:

[0011] When the stretching assembly is converted from the sitting position to the TV position, the first limit pin abuts against the first limit surface, and the front side of the seat mounting plate is restrained from tilting upward through the first front rotating member, ensuring that the side link member and the seat mounting plate move forward in a nearly translational state, thereby ensuring the stability of the backrest mechanism, eliminating the shaking phenomenon that easily occurs when the stretching assembly is unfolded, and improving the user experience and product quality. Description of the Drawings

[0012] Figure 1 is the rear view of the anti-shaking stretching assembly of the present utility model in the sitting position;

[0013] Figure 2 is Figure 1 the view when the second front rotating member in

[0014] Figure 3 is the rear view of the anti-shaking stretching assembly of the present utility model in the TV position;

[0015] Figure 4 is the front view of the anti-shaking stretching assembly of the present utility model in the lying position;

[0016] Figure 5 is the rear view of the anti-shaking stretching assembly of the present utility model in the lying position.

[0017] Wherein, 1 is the base rod, 2 is the seat mechanism, 21 is the front mounting member, 22 is the rear mounting member, 23 is the first front rotating member, 24 is the second front rotating member, 241 is the first limit pin, 25 is the rear rotating member, 251 is the second hanging pin, 26 is the seat mounting plate, 261 is the first hanging pin, 27 is the side link member, 271 is the first limit surface, 272 is the second limit surface, 28 is the intermediate rotating member, 281 is the second limit pin, 29 is the transmission member, 3 is the backrest mechanism, 31 is the backrest mounting plate, 32 is the rear support rod, 4 is the leg mechanism, 41 is the first leg link, 42 is the second leg link, 43 is the third leg link, 44 is the fourth leg link, 45 is the footrest mounting plate. Detailed Embodiments

[0018] The present utility model will be further clarified below in conjunction with the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. After reading the present utility model, various equivalent forms of modification of the present utility model by those skilled in the art all fall within the scope defined by the appended claims of this application.

[0019] As shown Figures 1-5 in the figure, an anti-shake extension component includes a base rod 1. A seat mechanism 2 is installed on the base rod. The seat mechanism includes a front mounting member 21 and a rear mounting member 22 hinged to the base rod. A front rotating member one 23 is pivotally connected to the top of the front mounting member, and a front rotating member two 24 is pivotally connected to the middle of the front mounting member. A rear rotating member 25 is pivotally connected to the top of the rear mounting member. The rear rotating member and the front rotating member one are simultaneously pivotally connected to a seat mounting plate 26 and a side link member 27. A backrest mechanism 3 is installed between the seat mounting plate and the rear rotating member. The backrest mechanism includes a backrest mounting plate 31 pivotally connected to the rear side of the seat mounting plate. The backrest mounting plate is pivotally connected to a rear support rod 32. The bottom of the rear support rod is pivotally connected to the rear rotating member. A first hanging pin 261 is installed at the rear of the seat mounting plate, and a second hanging pin 251 is installed on the rear rotating member. A tension spring (not shown) is installed between the first and second hanging pins. The tension spring is used to prevent disorder, that is, when the extension component is converted from a lying position to a TV position, it ensures that the backrest mechanism is reset first. A middle rotating member 28 is pivotally connected to the middle of the seat mounting plate. The bottom end of the middle rotating member is pivotally connected to a transmission member 29 connected to the leg mechanism 4. The leg mechanism includes a leg link one 41 and a leg link two 42 pivotally connected to the front side of the seat mounting plate. The rear side of the leg link one is pivotally connected to the transmission member. The front end of the leg link one is pivotally connected to a leg link three 43. The middle of the leg link three is pivotally connected to the leg link two. The front end of the leg link two is pivotally connected to a leg link four 44. The front ends of the leg link three and the leg link four are simultaneously pivotally connected to a footrest mounting plate 45. The top end of the middle rotating member is pivotally connected to the top end of the front rotating member two. A first limit pin 241 is installed in the middle of the front rotating member two. A first limit surface 271 matching the first limit pin is provided on the front top surface of the side link member. A second limit pin 281 is installed in the middle of the middle rotating member. A second limit surface 272 matching the second limit pin is provided on the rear top surface of the side link member.

[0020] The specific working process and principle of the present utility model: In the sitting posture state, the first limit pin abuts against the first limit surface, and the second limit pin abuts against the second limit surface. The second limit pin abutting against the second limit surface can prevent the stability of the backrest mechanism in the sitting posture and avoid the phenomenon of easy shaking under external force in this state. As the leg mechanism receives a driving force, the leg mechanism gradually unfolds. The first limit pin blocks the upward movement of the side link member, thereby forcing the side link member and the seat mounting plate to move forward in a nearly translational state, thus ensuring the stability of the backrest mechanism and eliminating the shaking phenomenon that easily occurs when the extension component unfolds, improving the user experience and product quality; when the extension component is in the lying position, the first limit pin abuts against the first limit surface. At this time, the side link member can provide a certain supporting force for the seat mounting plate, improving the stability of the extension component in this state.

Claims

1. An anti-sway extension assembly, comprising a base rod, a seat mechanism is arranged on the base rod, the seat mechanism comprises a front mounting member and a rear mounting member hinged to the base rod, a front rotating member 1 is pivotally connected to the top of the front mounting member, a front rotating member 2 is pivotally connected to the middle of the front mounting member, a rear rotating member is pivotally connected to the top of the rear mounting member, a seat mounting plate and a side connecting rod are pivotally connected to the rear rotating member and the front rotating member 1 at the same time, a backrest mechanism is arranged between the seat mounting plate and the rear rotating member, an intermediate rotating member is pivotally connected to the middle of the seat mounting plate, a transmission member connected to the leg mechanism is pivotally connected to the bottom end of the intermediate rotating member, and the top end of the intermediate rotating member is pivotally connected to the top end of the front rotating member 2, characterized in that: A first limiting pin is arranged in the middle of the second front rotating member, and a first limiting surface cooperating with the first limiting pin is opened on the front side of the side connecting rod.

2. The anti-sway extension assembly according to claim 1, characterized in that: A second limiting pin is arranged in the middle of the intermediate rotating member, and a second limiting surface cooperating with the second limiting pin is opened on the rear side of the side connecting rod.

3. The anti-sway extension assembly according to claim 1, characterized in that: The rear part of the seat mounting plate is provided with a first hanging pin, the rear rotating member is provided with a second hanging pin, and a tension spring is provided between the first and second hanging pins.

4. The anti-sway extension assembly according to claim 1, characterized in that: The leg mechanism includes a leg link 1 and a leg link 2 pivotally connected to the front side of the seat mounting plate, the rear side of the leg link 1 is pivotally connected to the transmission member, the front end of the leg link 1 is pivotally connected to the leg link 3, the middle part of the leg link 3 is pivotally connected to the leg link 2, the front end of the leg link 2 is pivotally connected to the leg link 4, and the front ends of the leg link 3 and the leg link 4 are simultaneously pivotally connected to the footrest mounting plate.

5. The anti-sway extension assembly according to claim 1, characterized in that: The backrest mechanism comprises a backrest mounting plate pivotally connected to the rear side of the seat mounting plate, the backrest mounting plate is pivotally connected to a rear support rod, and the bottom of the rear support rod is pivotally connected to the rear rotating member.

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