WO2020177544A1 - 一种沙发支架 - Google Patents

一种沙发支架 Download PDF

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Publication number
WO2020177544A1
WO2020177544A1 PCT/CN2020/075997 CN2020075997W WO2020177544A1 WO 2020177544 A1 WO2020177544 A1 WO 2020177544A1 CN 2020075997 W CN2020075997 W CN 2020075997W WO 2020177544 A1 WO2020177544 A1 WO 2020177544A1
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WO
WIPO (PCT)
Prior art keywords
connecting piece
support according
sofa
sofa support
assembly
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PCT/CN2020/075997
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English (en)
French (fr)
Inventor
李晓鸿
陈娇
吴林林
Original Assignee
锐迈机械科技（吴江）有限公司
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Publication of WO2020177544A1 publication Critical patent/WO2020177544A1/zh

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C17/00—Sofas; Couches; Beds
    • A47C17/04—Seating furniture, e.g. sofas, couches, settees, or the like, with movable parts changeable to beds; Chair beds
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C17/00—Sofas; Couches; Beds
    • A47C17/86—Parts or details for beds, sofas or couches only not fully covered in a single one of the sub-groups A47C17/02, A47C17/04, A47C17/38, A47C17/52, A47C17/64, or A47C17/84; Drawers in or under beds

Definitions

  • the invention relates to the field of sofa manufacturing, in particular to a sofa bracket.
  • the sofa In daily life, the sofa has become a very common furniture.
  • the sofa is a chair with cushions, which is a kind of software furniture. Compared with wooden seats, sofas can provide more comfort. With the continuous improvement of people's living standards, sofas as a kind of life enjoyment, more and more enter the homes of ordinary people.
  • Sofa brackets are the core components of sofas.
  • the extension mechanism is driven by the power drive device to extend.
  • the link in the existing power drive device is fixedly connected to the drive member, resulting in a problem with the transmission structure of the sofa support. The requirements are more complicated.
  • the purpose of the present invention is to provide a sofa support to solve the problems of the existing sofa support such as complex structure, difficult installation, high cost, inconvenient operation, and complex requirements on the transmission structure.
  • the present invention provides the following technical solutions:
  • a sofa support includes a base, a first connecting piece and two extension mechanisms located on both sides of the base,
  • Two ends of the first connecting member are respectively connected to the two extension mechanisms, and the two extension mechanisms are respectively connected to the base in rotation,
  • a first connecting portion is provided on the base, and the first connecting portion is used to rotatably connect with one end of the driving member,
  • the middle part of the first connecting member is provided with a second connecting part, and the second connecting part is used for rotationally connecting with the driving part,
  • the first connecting member is used to move under the drive of the driving member to drive the stretching mechanism to expand or retract.
  • each extension mechanism includes a backrest assembly, a seat assembly and a leg assembly, the leg assembly is slidably connected with the seat assembly, and the backrest assembly is rotatably connected with the seat assembly.
  • leg assembly is connected to the seat assembly through a second connecting piece, and a sliding groove is provided on the second connecting piece, and the leg assembly can slide in the sliding groove.
  • the base includes a third connecting piece, a fourth connecting piece, a fifth connecting piece, and a sixth connecting piece, the third connecting piece, the fourth connecting piece, the fifth connecting piece and the The sixth connecting members are sequentially connected to form a frame structure.
  • the third connecting piece is parallel to the fifth connecting piece
  • the fourth connecting piece is parallel to the sixth connecting piece
  • both the fourth connecting piece and the sixth connecting piece are Parallel to the backrest of the sofa.
  • the fourth connecting member is arranged close to the backrest assembly, and the sixth connecting member is arranged close to the leg assembly.
  • each of the backrest components includes a seventh connector, and each of the backrest components is rotatably connected with the third connector through the seventh connector.
  • a first fixing member is provided between the seventh connecting members on the two backrest components.
  • each of the seat components includes an eighth connecting piece, and each of the seat components is rotatably connected with the third connecting piece through the eighth connecting piece.
  • a second fixing member is provided between the eighth connecting members on the two seat assemblies.
  • first connecting portion is connected with the driving member through a first rotating shaft.
  • the second connecting portion is connected to the driving member through a second rotating shaft.
  • the first rotating shaft is a bolt or a rotating screw
  • the second rotating shaft is a bolt or a rotating screw
  • the cross section of the first connecting member is circular, rectangular or L-shaped.
  • the driving member is a lead screw, an air cylinder or a spring.
  • the present invention has the following beneficial effects:
  • the sofa bracket has fewer parts, simple structure, convenient installation, low cost and convenient operation;
  • the base and the first connecting part in the sofa bracket are respectively provided with a first connecting part and a second connecting part, and the base and the first connecting part are respectively rotatably connected with the driving part through the first connecting part and the second connecting part.
  • the requirements for the transmission structure of the sofa bracket are relatively simple;
  • the first connecting part and the second connecting part are respectively connected with the driving part through the first rotating shaft and the second rotating shaft.
  • the first rotating shaft and the second rotating shaft adopt pins or rotating screws, etc., which is beneficial to improve the installation efficiency of the sofa bracket.
  • Figure 1 is a schematic diagram of the main components of a sofa bracket provided by an embodiment of the present invention
  • FIG. 2 is a schematic diagram of the leg assembly, seat assembly and backrest assembly of the sofa bracket provided by the embodiment of the present invention when fully folded;
  • FIG. 3 is a schematic diagram of the leg assembly, seat assembly and backrest assembly of the sofa bracket provided by the embodiment of the present invention when fully deployed;
  • FIG. 4 is a schematic diagram of the sofa support provided by the embodiment of the present invention when the backrest component is completely tilted;
  • connection in the present invention, unless otherwise clearly specified and limited, the terms “installation”, “connection” and other terms should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; It can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • installation may be a fixed connection, a detachable connection, or an integral connection; It can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • the embodiment of the present invention provides a sofa stand
  • the sofa stand includes a base 1, a first connecting member 2 and two stretching mechanisms 3 located on both sides of the base 1, the first Two ends of a connecting member 2 are respectively connected to the two extension mechanisms 3, and the two extension mechanisms 3 are respectively connected to the base 1 in rotation.
  • each extension mechanism 3 includes a backrest assembly 31, a seat assembly 32, and a leg assembly 33.
  • the leg assembly 33 is slidably connected to the seat assembly 32, and the backrest assembly 31 is connected to the seat
  • the chair assembly 32 is rotatably connected.
  • the leg assembly 33 may be connected to the seat assembly 32 through a second connecting member 4, and a sliding groove 41 is provided on the second connecting member 4, and the leg assembly 33 can be The sliding groove 41 slides in, thereby achieving a sliding connection between the leg assembly 33 and the seat assembly 32.
  • both ends of the first connecting member 2 may be connected to the two seat assemblies 32 respectively.
  • the first connecting member 2 may be a rod-shaped structure with a circular cross section.
  • the first connecting member 2 may be a plate-shaped structure with a rectangular cross section.
  • the first connecting member 2 may be an angle iron structure with an L-shaped cross section.
  • the base 1 includes a third connection piece 11, a fourth connection piece 12, a fifth connection piece 13, and a sixth connection piece 14.
  • the third connection piece 11, the fourth connection piece 12, and the The fifth connecting member 13 and the sixth connecting member 14 are sequentially connected to form a frame structure.
  • the third connecting member 11 may be parallel to the fifth connecting member 13, and the fourth connecting member 12 may be parallel to the sixth connecting member 14.
  • the fourth connecting member 12 and the sixth connecting member 14 may both be parallel to the backrest of the sofa.
  • the fourth connecting member 12 may be located close to the backrest assembly 31, and the sixth connecting member 14 may be located close to the leg assembly 33.
  • each of the backrest components 31 includes a seventh connecting member 5, and each of the backrest components 31 is rotatably connected with the third connecting member 11 through the seventh connecting member 5.
  • a first fixing member 7 may be provided between the seventh connecting members 5 on the two backrest assemblies 31, and the torsion resistance capability of the stretching mechanism 3 can be improved by the first fixing member 7 .
  • each of the seat components 32 includes an eighth connecting member 6, and each of the seat components 32 is rotatably connected to the third connecting member 11 through the eighth connecting member 6.
  • a second fixing member 8 may be provided between the eighth connecting members 6 on the two seat assemblies 32, and the stability of the stretching mechanism 3 can be improved by the second fixing member 8 .
  • a first connecting portion 121 is provided on the base 1, and the first connecting portion 121 is configured to be rotatably connected with one end of a driving member (not shown in the figure).
  • the fourth connecting member is provided with a first connecting portion 121, and the first connecting portion 121 is rotatably connected with one end of the driving member.
  • a second connecting portion 21 is provided in the middle of the first connecting member, and the second connecting portion 21 is used for rotationally connecting with the driving member.
  • the first connecting member is used to move under the drive of the driving member to drive the stretching mechanism to expand or retract.
  • first connecting portion 121 and the second connecting portion 21 are connected to the driving member through a first rotating shaft and a second rotating shaft, respectively.
  • the first rotation shaft and the second rotation shaft may be plug pins, the plug pins include a polished rod, and one end of the polished rod is provided with a plug.
  • first rotating shaft and the second rotating shaft may be rotating screws, and the rotating screws include a nut and a thread, and there is a polished rod structure between the nut and the thread.
  • the driving member may be a lead screw.
  • the driving member may be an air cylinder.
  • the driving member may be a spring.
  • the driving member drives the first connecting member 2 to move forward (the left side of FIG. 1), and the force of the first connecting member 2 drives the leg assembly 33 and the seat assembly 32 in turn. Unfold with the backrest assembly 31.
  • the leg assembly 33 is prevented from continuing to unfold, thereby driving the backrest assembly 31 to fall completely, so that the sofa bracket realizes the transition from Figure 2 to Figure 3 Then to the process of the state in Figure 4.
  • the seventh connecting piece 5 and the eighth connecting piece 6 are reversed around the third connecting piece 11
  • the hour hand (in the direction indicated by the arrow in Figure 2) rotates.
  • the driving member drives the first connecting member 2 to move backward (the right side of FIG. 1), and the force of the first connecting member 2 drives the leg assembly 33 and the seat in turn.
  • the assembly 32 and the backrest assembly 31 are retracted, so that the sofa bracket can realize the process from Fig. 4 to Fig. 3 and then to Fig. 2 state.
  • the seventh connecting member 5 and the eighth connecting member 6 smoothly around the third connecting member 11
  • the hour hand (in the direction indicated by the arrow in Figure 4) rotates.
  • the driving member can rotate relative to the base 1, and the first connecting member 2 can rotate relative to the driving member.
  • the sofa bracket has fewer parts, simple structure, convenient installation, low cost and convenient operation;
  • the base and the first connecting part in the sofa bracket are respectively provided with a first connecting part and a second connecting part, and the base and the first connecting part are respectively rotatably connected with the driving part through the first connecting part and the second connecting part.
  • the requirements for the transmission structure of the sofa bracket are relatively simple;
  • the first connecting part and the second connecting part are respectively connected with the driving part through the first rotating shaft and the second rotating shaft.
  • the first rotating shaft and the second rotating shaft adopt pins or rotating screws, etc., which is beneficial to improve the installation efficiency of the sofa bracket.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

本发明公开了一种沙发支架，包括基座、第一连接件和位于基座两侧的两个伸展机构，第一连接件的两端分别与两个伸展机构连接，两个伸展机构分别与基座转动连接，基座上设置有第一连接部，第一连接部用于与驱动件的一端转动连接，第一连接件的中部设置有第二连接部，第二连接部用于与驱动件转动连接，第一连接件用于在驱动件的驱动下移动，以带动伸展机构展开或收回。上述沙发支架整体组成零件较少，结构简单、安装方便、成本低廉且操作便捷；基座和第一连接件分别通过第一连接部和第二连接部与驱动件转动连接，对沙发支架的传动结构的要求较为简单；第一连接部和第二连接部分别通过第一转轴和第二转轴与驱动件连接，有利于提高沙发支架的安装效率。

Description

一种沙发支架 技术领域
本发明涉及沙发制造领域，具体涉及一种沙发支架。
背景技术
日常生活中，沙发已经成为一种十分普遍的家具，沙发为一种装有软垫的椅子，是软件家具的一种。相对木制座椅，沙发能够给人提供更多的舒适感。随着人们生活水平的不断提高，沙发作为一种生活享受品，越来越多的进入到寻常百姓的家中。
沙发支架是沙发的核心部件，目前市场上现有的沙发支架大多具有结构复杂、安装困难、成本较高以及操作不便等特点。并且，现有的沙发支架大多具有伸展机构和动力驱动装置，通过动力驱动装置驱动伸展机构进行伸展，现有的动力驱动装置中的连杆与驱动件固定连接，导致对沙发支架的传动结构的要求较为复杂。
因此，有必要对现有的沙发支架进行改进。
发明内容
本发明的目的在于提供一种沙发支架，以解决现有的沙发支架结构复杂、安装困难、成本较高、操作不便，以及对传动结构的要求较为复杂等问题。
为了达到上述目的，本发明提供如下技术方案：
一种沙发支架，包括基座、第一连接件和位于所述基座两侧的两个伸展机构，
所述第一连接件的两端分别与两个所述伸展机构连接，两个所述伸展机构分别与所述基座转动连接，
所述基座上设置有第一连接部，所述第一连接部用于与驱动件的一端转动连接，
所述第一连接件的中部设置有第二连接部，所述第二连接部用于与所述驱动件转动连接，
所述第一连接件用于在所述驱动件的驱动下移动，以带动所述伸展机构展开或收回。
进一步的，每个所述伸展机构包括靠背组件、座椅组件和腿部组件，所述腿部组件与所述座椅组件滑动连接，所述靠背组件与所述座椅组件转动连接。
进一步的，所述腿部组件通过第二连接件与所述座椅组件连接，所述第二连接件上设置有滑槽，所述腿部组件能够在所述滑槽内滑动。
进一步的，所述基座包括第三连接件、第四连接件、第五连接件和第六连接件，所述第三连接件、所述第四连接件、所述第五连接件和所述第六连接件依次连接形成框架结构。
进一步的，所述第三连接件与所述第五连接件相平行，所述第四连接件与所述第六连接件相平行，且所述第四连接件和所述第六连接件均与沙发的靠背相平行。
进一步的，所述第四连接件靠近所述靠背组件设置，所述第六连接件靠近所述腿部组件设置。
进一步的，每个所述靠背组件包括第七连接件，每个所述靠背组件通过所述第七连接件与所述第三连接件转动连接。
进一步的，两个所述靠背组件上的第七连接件之间设置有第一固定件。
进一步的，每个所述座椅组件包括第八连接件，每个所述座椅组件通过所述第八连接件与所述第三连接件转动连接。
进一步的，两个所述座椅组件上的第八连接件之间设置有第二固定件。
进一步的，所述第一连接件的两端分别与两个所述座椅组件连接。
进一步的，所述第一连接部通过第一转轴与所述驱动件连接。
进一步的，所述第二连接部通过第二转轴与所述驱动件连接。
优选的，所述第一转轴为插销或转动螺丝，所述第二转轴为插销或转 动螺丝。
优选的，所述第一连接件的截面为圆形、矩形或L形。
优选的，所述驱动件为丝杠、气缸或弹簧。
与现有技术相比，本发明具有如下有益效果：
1、沙发支架整体组成零件较少，结构简单、安装方便、成本低廉且操作便捷；
2、沙发支架中的基座和第一连接件上分别设置有第一连接部和第二连接部，基座和第一连接件分别通过第一连接部和第二连接部与驱动件转动连接，对沙发支架的传动结构的要求较为简单；
3、第一连接部和第二连接部分别通过第一转轴和第二转轴与驱动件连接，第一转轴和第二转轴采用插销或转动螺丝等，有利于提高沙发支架的安装效率。
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方式，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它附图。
图1为本发明实施例提供的沙发支架的主要部件组成示意图；
图2为本发明实施例提供的沙发支架的腿部组件、座椅组件和靠背组件完全收拢时的示意图；
图3为本发明实施例提供的沙发支架的腿部组件、座椅组件和靠背组件完全展开时的示意图；
图4为本发明实施例提供的沙发支架的靠背组件完全倾倒时的示意图；
图中：1-基座，11-第三连接件，12-第四连接件，121-第一连接部，13-第五连接件，14-第六连接件，2-第一连接件，21-第二连接部，3-伸展机构，31-靠背组件，32-座椅组件，33-腿部组件，4-第二连接件，41-滑槽，5-第 七连接件，6-第八连接件，7-第一固定件，8-第二固定件。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚明了，下面结合具体实施方式并参照附图，对本发明进一步详细说明。应该理解，这些描述只是示例性的，而并非要限制本发明的范围。
在本发明的描述中，需要理解的是，术语“第一”、“第二”、“第三”、“第四”、“第五”、“第六”、“第七”、“第八”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”、“第三”、“第四”、“第五”、“第六”、“第七”、“第八”的特征可以明示或者隐含地包括一个或者更多个该特征。
此外，在本发明中，除非另有明确的规定和限定，术语“安装”、“连接”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
实施例
如图1所示，本发明实施例提供了一种沙发支架，所述沙发支架包括基座1、第一连接件2和位于所述基座1两侧的两个伸展机构3，所述第一连接件2的两端分别与两个所述伸展机构3连接，两个所述伸展机构3分别与所述基座1转动连接。
具体的，每个所述伸展机构3包括靠背组件31、座椅组件32和腿部组件33，所述腿部组件33与所述座椅组件32滑动连接，所述靠背组件31与所述座椅组件32转动连接。
在一些实施例中，所述腿部组件33可以通过第二连接件4与所述座椅组件32连接，所述第二连接件4上设置有滑槽41，所述腿部组件33能够在所述滑槽41内滑动，从而实现所述腿部组件33与所述座椅组件32滑动 连接。
在一些实施例中，所述第一连接件2的两端可以分别与两个所述座椅组件32连接。
在一些实施例中，所述第一连接件2可以为截面呈圆形的杆状结构。
在另一些实施例中，所述第一连接件2可以为截面呈矩形的板状结构。
在另一些实施例中，所述第一连接件2可以为截面呈L形的角铁结构。
具体的，所述基座1包括第三连接件11、第四连接件12、第五连接件13和第六连接件14，所述第三连接件11、所述第四连接件12、所述第五连接件13和所述第六连接件14依次连接形成框架结构。
在一些实施例中，所述第三连接件11可以与所述第五连接件13相平行，所述第四连接件12可以与所述第六连接件14相平行。
在一些实施例中，所述第四连接件12和所述第六连接件14可以均与沙发的靠背相平行。
在一些实施例中，所述第四连接件12可以靠近所述靠背组件31设置，所述第六连接件14可以靠近所述腿部组件33设置。
具体的，每个所述靠背组件31包括第七连接件5，每个所述靠背组件31通过所述第七连接件5与所述第三连接件11转动连接。
在一些实施例中，两个所述靠背组件31上的第七连接件5之间可以设置有第一固定件7，通过所述第一固定件7能够提高所述伸展机构3的抗扭转能力。
具体的，每个所述座椅组件32包括第八连接件6，每个所述座椅组件32通过所述第八连接件6与所述第三连接件11转动连接。
在一些实施例中，两个所述座椅组件32上的第八连接件6之间可以设置有第二固定件8，通过所述第二固定件8能够提高所述伸展机构3的稳定性。
进一步的，所述基座1上设置有第一连接部121，所述第一连接部121用于与驱动件(图中未示出)的一端转动连接。
在一些实施例中，所述第四连接件上设置有第一连接部121，所述第一连接部121与所述驱动件的一端转动连接。
进一步的，所述第一连接件的中部设置有第二连接部21，所述第二连接部21用于与所述驱动件转动连接。所述第一连接件用于在所述驱动件的驱动下移动，以带动所述伸展机构展开或收回。
在一些实施例中，所述第一连接部121和所述第二连接部21分别通过第一转轴和第二转轴与所述驱动件连接。
在一些实施例中，所述第一转轴和所述第二转轴可以为插销，所述插销包括光杆，所述光杆的一端设置有堵头。
在另一些实施例中，所述第一转轴和所述第二转轴可以为转动螺丝，所述转动螺丝包括螺帽和螺纹，所述螺帽与所述螺纹之间为光杆结构。
在一些实施例中，所述驱动件可以为丝杠。
在另一些实施例中，所述驱动件可以为气缸。
在另一些实施例中，所述驱动件可以为弹簧。
本发明实施例提供的沙发支架的工作原理如下：
所述驱动件带动所述第一连接件2向前(图1的左侧)运动，通过所述第一连接件2的作用力，依次带动所述腿部组件33、所述座椅组件32和所述靠背组件31展开，待完全展开到极限位置时，阻止所述腿部组件33继续展开，从而带动所述靠背组件31完全倾倒，这样所述沙发支架就实现了从图2到图3再到图4状态的过程。在所述腿部组件33、所述座椅组件32和所述靠背组件31展开的过程中，所述第七连接件5和所述第八连接件6绕着所述第三连接件11逆时针(图2箭头所示方向)转动。反之，所述驱动件带动所述第一连接件2向后(图1的右侧)运动，通过所述第一连接件2的作用力，依次带动所述腿部组件33、所述座椅组件32和所述靠背组件31收回，这样所述沙发支架可实现从图4到图3再到图2状态的过程。在所述腿部组件33、所述座椅组件32和所述靠背组件31收回的过程中，所述第七连接件5和所述第八连接件6绕着所述第三连接件11顺时针(图4箭头所示方向)转动。其中，在上述沙发支架运动过程中，所述驱动件可相对于所述基座1进行转动，所述第一连接件2相对于所述驱动件进行转动。
本发明实施例提供的沙发支架具有如下优点：
1、沙发支架整体组成零件较少，结构简单、安装方便、成本低廉且操作便捷；
2、沙发支架中的基座和第一连接件上分别设置有第一连接部和第二连接部，基座和第一连接件分别通过第一连接部和第二连接部与驱动件转动连接，对沙发支架的传动结构的要求较为简单；
3、第一连接部和第二连接部分别通过第一转轴和第二转轴与驱动件连接，第一转轴和第二转轴采用插销或转动螺丝等，有利于提高沙发支架的安装效率。
应当理解的是，本发明的上述具体实施方式仅仅用于示例性说明或解释本发明的原理，而不构成对本发明的限制。因此，在不偏离本发明的精神和范围的情况下所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (16)

  1. 一种沙发支架，其特征在于，包括基座(1)、第一连接件(2)和位于所述基座(1)两侧的两个伸展机构(3)，
    所述第一连接件(2)的两端分别与两个所述伸展机构(3)连接，两个所述伸展机构(3)分别与所述基座(1)转动连接，
    所述基座(1)上设置有第一连接部(121)，所述第一连接部(121)用于与驱动件的一端转动连接，
    所述第一连接件(2)的中部设置有第二连接部(21)，所述第二连接部(21)用于与所述驱动件转动连接，
    所述第一连接件(2)用于在所述驱动件的驱动下移动，以带动所述伸展机构(3)展开或收回。
  2. 根据权利要求1所述的沙发支架，其特征在于，每个所述伸展机构(3)包括靠背组件(31)、座椅组件(32)和腿部组件(33)，所述腿部组件(33)与所述座椅组件(32)滑动连接，所述靠背组件(31)与所述座椅组件(32)转动连接。
  3. 根据权利要求2所述的沙发支架，其特征在于，所述腿部组件(33)通过第二连接件(4)与所述座椅组件(32)连接，所述第二连接件(4)上设置有滑槽(41)，所述腿部组件(33)能够在所述滑槽(41)内滑动。
  4. 根据权利要求2所述的沙发支架，其特征在于，所述基座(1)包括第三连接件(11)、第四连接件(12)、第五连接件(13)和第六连接件(14)，所述第三连接件(11)、所述第四连接件(12)、所述第五连接件(13)和所述第六连接件(14)依次连接形成框架结构。
  5. 根据权利要求4所述的沙发支架，其特征在于，所述第三连接件(11)与所述第五连接件(13)相平行，所述第四连接件(12)与所述第六连接 件(14)相平行，且所述第四连接件(12)和所述第六连接件(14)均与沙发的靠背相平行。
  6. 根据权利要求4所述的沙发支架，其特征在于，所述第四连接件(12)靠近所述靠背组件(31)设置，所述第六连接件(14)靠近所述腿部组件(33)设置。
  7. 根据权利要求4所述的沙发支架，其特征在于，每个所述靠背组件(31)包括第七连接件(5)，每个所述靠背组件(31)通过所述第七连接件(5)与所述第三连接件(11)转动连接。
  8. 根据权利要求7所述的沙发支架，其特征在于，两个所述靠背组件(31)上的第七连接件(5)之间设置有第一固定件(7)。
  9. 根据权利要求4所述的沙发支架，其特征在于，每个所述座椅组件(32)包括第八连接件(6)，每个所述座椅组件(32)通过所述第八连接件(6)与所述第三连接件(11)转动连接。
  10. 根据权利要求9所述的沙发支架，其特征在于，两个所述座椅组件(32)上的第八连接件(6)之间设置有第二固定件(8)。
  11. 根据权利要求2所述的沙发支架，其特征在于，所述第一连接件(2)的两端分别与两个所述座椅组件(32)连接。
  12. 根据权利要求1所述的沙发支架，其特征在于，所述第一连接部(121)通过第一转轴与所述驱动件连接。
  13. 根据权利要求12所述的沙发支架，其特征在于，所述第二连接部(21)通过第二转轴与所述驱动件连接。
  14. 根据权利要求13所述的沙发支架，其特征在于，所述第一转轴为插销或转动螺丝，所述第二转轴为插销或转动螺丝。
  15. 根据权利要求1-14中任一项所述的沙发支架，其特征在于，所述第一连接件(2)的截面为圆形、矩形或L形。
  16. 根据权利要求1-14中任一项所述的沙发支架，其特征在于，所述驱动件为丝杠、气缸或弹簧。
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