WO2023193488A1

WO2023193488A1 - Mechanical extension device and seat connection structure

Info

Publication number: WO2023193488A1
Application number: PCT/CN2022/143073
Authority: WO
Inventors: 金寺苗; 庄文浩
Original assignee: 永艺家具股份有限公司
Priority date: 2022-04-08
Filing date: 2022-12-29
Publication date: 2023-10-12
Also published as: CN218105374U

Abstract

A mechanical extension device (4) and a seat connection structure. The mechanical extension device comprises a footrest assembly (16), a seat cushion support assembly (17) and a backrest assembly (18); the backrest assembly (18) comprises a backrest support portion (4a) and a connection assembly (A) arranged on the backrest support portion (4a); the connection assembly (A) comprises a connection base (9) and a clamp (7) connected to the connection base (9), a slot (7b) in the clamp (7) extending from top to bottom, and the clamp (7) and the connection base (9) abutting left and right against each other; a first mounting hole (11a) and a second mounting hole (12a) which are spaced front and back apart from each other are pre-arranged in the backrest support portion (4a); the front end and the rear end of the connection base (9) are respectively rotatably connected to the first mounting hole (11a) and the second mounting hole (12a). A seat comprises a back frame (1), a seat portion assembly (2) and the mechanical extension devices (4); the mechanical extension devices (4) are arranged in a mirroring manner on the left side and the right side below a seat cushion assembly (3); the upper ends of the clamps (7) are located below the seat surface of the seat cushion assembly (3). Therefore, during packaging, the back frame (1) can be horizontally stacked on a seat cushion and the upper ends of the clamps (7) do not interfere with the back frame (1), which helps to conveniently package and transport the seat.

Description

Mechanical extension device and seat connection structure

Technical field

The invention relates to the field of furniture structures, and in particular to a mechanical extension device and a seat connection structure.

Background technique

Nowadays, multifunctional sofas have gradually become one of the indispensable pieces of furniture in people's daily lives. People can sit on the sofa to work or lie on the sofa to rest and relax. The sofa can be tilted accordingly. Most of the structures of existing multi-functional sofas of this type are provided with metal mechanical extension devices under the seat frame of the sofa for realizing the movement of the sofa; such as the applicant's previous patent applications "201810055526.8" and "201921265059.8" "The mechanical extension device shown in ", etc.; this kind of mechanical extension device usually includes: a footrest assembly, a seat cushion support assembly and a backrest assembly, and the cushion support assembly includes a seat mounting plate for installing the seat cushion assembly.

The backrest assembly usually includes a backrest connector, which has an upwardly extending metal insert and a front hinge part and a rear hinge part arranged one after the other. Depending on the actual configuration, the front hinge part is connected to the seat mounting plate or to the seat mounting plate. The other connecting rods of the mechanical extension device are hinged, and the rear hinge part is hinged with the support link connected to the bottom plate of the mechanical extension device, or the rear hinge part is hinged with other connecting rods; the specific combination is as follows: on the left and right sides of the sofa back frame Corresponding sockets are provided; when assembling the sofa backrest, the sockets and inserts are plugged up and down to complete the assembly of the backrest; in specific applications, the backrest moves backward or forward with the operation of the mechanical extension device. This combination of inserts and socket components used on sofas is a common method in the current industry; but currently, in order to facilitate consumers' self-assembly, that is to say, the complicated installation work is left to be completed before leaving the factory, and the simple The easy installation work is left to the user; therefore, when leaving the factory, the seat cushion assembly with the support plate is usually pre-fixed on the seat mounting plate; in order to meet the requirements of the insertion length, the inserts are all protruding upward over the entire mechanical extension. This is understandable in itself; however, after the seat cushion assembly is installed, the upper end of the insert is basically upward and higher than the sofa seat surface, usually 20-40cm higher; this brings inconvenience to packaging and transportation. The specific manifestations of these inconveniences are introduced below.

Currently, most of the backrest frames of the existing multifunctional sofas are wooden frame structures with a certain thickness; when the sofa is split, packaged and transported, the backrest frames are stacked horizontally on the seat surface. ; Pre-saw the notches for the inserts on the wooden backrest frame so that the backrest frame can lie flat on the seat cushion assembly without tilting up. However, the overall thickness of the backrest of the above-mentioned wooden structure is relatively thick, and the wooden backrest is also covered with a back soft bag; this makes the overall structure of the sofa after packaging still have a relatively large thickness. In addition, wood processing is inconvenient and requires many processing steps; In order to reduce the processing steps, reduce the use of wood, and further save the packaging volume, a metal backrest frame is specially considered, which is installed at the lower ends of both sides of the backrest frame through screws; and a backrest soft bag is also provided to be used in conjunction with the backrest frame; in application At this time, the soft backrest cover is placed on the backrest frame to form an integral sofa backrest; by replacing the wooden backrest frame with a metal frame structure, the above measures can save packaging volume and increase the amount of product cabinets.

But the ensuing problem is: if the backrest adopts a metal frame structure, the above-mentioned inserts are higher than the seat surface of the sofa; when the metal backrest frame is stacked horizontally on the seat surface of the sofa's cushion assembly, the metal The rear end of the backrest frame will conflict with and interfere with the upper end of the insert; that is to say, because it cannot have an avoidance gap like the previous wooden frame, the end of the backrest frame will become warped; this will cause the metal backrest to warp. The frame cannot fully fit on the seat surface for packaging; or in order to lie flat, the backrest frame must be moved left and right to stagger the inserts, but this will cause the left and right sides of the frame to exceed the seat cushion assembly, making it difficult to fit, and will also affect the packaging effect of the sofa.

In addition, it is unrealistic to directly lower the installation height of the inserts or shorten the length of the inserts. This will lower the installation height of the backrest, affect the comfort of the sofa, or interfere with the movement trajectory of the mechanical extension device.

Then, there is an urgent need to propose a solution to the above-mentioned problem of interference between the metal backrest frame and the inserts during packaging.

Technical solutions

The present invention overcomes the above-mentioned deficiencies in the prior art and first provides a mechanical extension device; the socket can be installed on the backrest support at the rear end of the mechanical extension device through a connecting base, and the connection structure is simple; and the socket is installed Finally, only a small part of the upper end of the socket protrudes above the mechanical extension device, which can reduce the overall height of the rear end of the mechanical extension device.

Then a seat connection structure is provided. By installing the socket on the rear end of the mechanical extension device, the insert is welded to the bottom of the side support body of the back frame; so that after the seat is assembled, the upper end of the socket will be located below the seat surface of the cushion assembly. , and then the back frame can be disassembled and placed horizontally on the seat cushion assembly for packaging and transportation. The back frame and the socket can be spaced up and down without affecting each other; and the back frame can be stacked horizontally on the seat cushion assembly for packaging and transportation. , does not change the plug-in matching structure between the back frame and the mechanical extension device, and does not change the installation height of the back frame; the structural design is ingenious.

The technical solution of the present invention is implemented as follows:

A mechanical extension device includes a footrest component, a seat cushion support component and a backrest component; the backrest component includes a backrest support part and a connection component provided on the backrest support part, the connection component is configured to connect the backrest; the connection component It includes a connection base installed on the backrest support part and a socket connected to the connection base. The slot on the socket extends from top to bottom, and the socket and the connection base are close to each other left and right; the backrest support part A first mounting hole and a second mounting hole spaced front and back are preset on the base; the front and rear ends of the connecting base are rotatably connected to the first mounting hole and the second mounting hole respectively.

Preferably, the connection base has a "cross"-shaped structure, and the connection base includes a vertical base plate and connecting plates located on the left and right sides of the base plate respectively; the base plate is configured to be connected to the socket; the connecting plate configuration For connection to the backrest support. Then, the connecting plate connected to the base is used to be installed on the backrest support part, and the base plate connected to the base is used to connect the socket; and the connecting plate is located in the middle of the base plate, which can reduce the installation height of the socket.

Preferably, the backrest support part includes two first connecting rods and a second connecting rod spaced front and back; the first mounting hole is provided on the first connecting rod, and the second mounting hole is provided on the second connecting rod; the connection base The connecting plates on both sides are connected to the first mounting hole and the second mounting hole respectively. The first mounting hole and the second mounting hole are universal mounting points at the rear end of the mechanical extension device in the existing structure; these two points are then used to install the connection base for connecting the socket; so that there is no need to change the mechanical extension The structure of the device ensures structural versatility.

Preferably, there is a gap between the connecting plate and the base plate along the thickness direction of the connecting base. Separate the base plate from the mechanical extension device to avoid interference with the iron frame during the movement of the mechanical extension device after the socket is installed, without affecting the function of the seat

Preferably, the left and right sides of the base plate are respectively provided with transition sections perpendicular to the base plate, and the connecting plate is arranged on the transition sections. The connecting plate and the base plate are separated along the width direction of the back frame through the transition section.

Preferably, the socket and the connection base are detachably connected.

Preferably, the socket has a protruding positioning protrusion, and the base plate is correspondingly provided with a mounting countersunk hole; the socket is attached to the base plate so that the positioning protrusion is embedded in the installation countersunk hole; and the socket and The base plate is connected with screws. The positioning protrusion is an industry-standard structure of the socket itself. The base plate can match the structure on the socket to make the two more closely connected; the connection is convenient and quick through screw connection.

A seat connection structure, a back frame, a seat assembly and the mechanical extension device; the back frame is a metal frame structure, and the back frame includes side supports located on the left and right sides respectively, and at the bottom of each side support There is an insert that can be plugged and matched with the socket; the seat component includes a cushion component, and the mechanical extension device is mirrored on the left and right sides below the cushion component; and the upper end of the socket is located below the seat surface of the cushion component. .

Preferably, the height difference between the upper end of the socket and the seat surface of the seat cushion assembly is between 1-10 cm.

Preferably, the back frame is made of metal square tubes; the upper end of the insert is provided with a strip-shaped welding plate, and the welding plate is attached and welded to the inside of the side support. The back frame is a metal frame, and the metal inserts can be directly welded to the back frame, making the connection easy and stable.

beneficial effects

First, the socket is installed on the back support part of the mechanical extension device, and the insert is welded to the bottom of the side support of the back frame; thus, after the seat is assembled, the upper end of the socket will not exceed the seat surface of the cushion assembly, and then the The back frame is placed horizontally on the seat cushion assembly for packaging and transportation. The back frame and the socket can be separated up and down; and while the back frame can be stacked horizontally on the seat cushion assembly for packaging and transportation, the distance between the back frame and the mechanical extension device does not change. The plug-in structure does not change the installation height of the back frame; the structural design is ingenious. Different from the existing seat connection structure in which the insert is installed on the rear end of the mechanical extension device and the socket is installed on the side support, the upper end of the insert will protrude above the seat surface. If the metal back frame is placed horizontally during packaging, If the seat cushion assembly is installed, the rear end of the back frame will conflict with the upper end of the insert, affecting the seat connection structure of the packaging effect.

Secondly, the structural connection is simple, and the inserts can be directly welded to the back frame; a connection base is installed on the backrest support part at the rear end of the mechanical extension device, and the connection structure between the connection base and the mechanical extension device is consistent with that in the prior art. The connection structure of the insert and the mechanical extension device is the same; thus, the structure of the mechanical extension device will not be changed, and the versatility is good; the socket can also be quickly connected to the connection base using screws; the overall structure is streamlined, making it convenient for users to install.

Furthermore, along the width direction of the back frame, there is a gap between the connecting plate and the base plate; so that the base plate is separated from the mechanical extension device to avoid interference with the iron frame during the movement of the mechanical extension device after the socket is installed. Affects the function of the seat; the design is more thoughtful.

Description of the drawings

Figure 1 is a schematic three-dimensional structural diagram of a mechanical stretching device in an embodiment of the present invention;

Figure 2 is a side view of the connection between the back frame and the mechanical extension device in the seat in the embodiment of the present invention;

Figure 3 is a schematic three-dimensional structural diagram of the connection between the back frame and the plug-in blade in the embodiment of the present invention;

Figure 4 is an exploded view of the connection between the connecting component and the backrest support part in the embodiment of the present invention;

Figure 5 is an enlarged view of part B in Figure 4;

Figure 6 is a schematic three-dimensional structural diagram of the socket installed on the mechanical extension device according to the embodiment of the present invention;

Figure 7 is a schematic three-dimensional structural diagram of the connection base in an embodiment of the present invention;

Figure 8 is a schematic three-dimensional structural diagram of the connection structure on the back of the seat in an embodiment of the present invention;

Figure 9 is a schematic structural diagram of the seat in a packaged state according to the embodiment of the present invention.

Each reference number is: back frame 1; side support body 1a; seat component 2; seat cushion component 3; mechanical extension device 4; backrest support part 4a; armrest component 5; armrest base 5a; armrest part 5b; connection component A ; Insert 6; Socket 7; Positioning protrusion 7a; Slot 7b; Welding class 8; Connection base 9; Base plate 10; First connecting rod 11; First mounting hole 11a; Second connecting rod 12; Second installation Hole 12a; connecting plate 13; partition 14; mounting counterbore 15; footrest assembly 16; cushion support assembly 17; backrest assembly 18.

Best Mode of Carrying Out the Invention

The specific implementation of the present invention is as follows:

As shown in Figures 1-9, the present invention provides a mechanical extension device and a seat connection structure in which the mechanical extension device is specifically used on a seat; wherein, the mechanical extension device 4 includes a footrest assembly 16, a seat cushion support Assembly 17 and backrest assembly 18; the backrest assembly 18 is located at the rear end, and the backrest assembly 18 includes a backrest support part 4a and a connection assembly A provided on the backrest support part 4a; the connection assembly A includes a backrest support part 4a. The connection base 9 and the socket 7 detachably connected to the connection base 9; the socket 7 is configured for plugging and mating with the back frame 1 of the seat.

The seat includes a back frame 1, a seat component 2 and an armrest component 5; as shown in Figure 9, the armrest component 5 includes an armrest base 5a and an armrest part 5b; the back frame 1 is a metal frame structure. 1 includes side supports 1a located on the left and right sides respectively. The bottom of each side support 1a is provided with an insert 6 that can be plugged and matched with the socket 7, and the insert 6 is welded and fixed on the side support 1a, and connected convenient.

The seat assembly 2 includes a seat cushion assembly 3, and the mechanical extension device 4 is disposed on the left and right sides below the seat cushion assembly 3; the armrest assembly 5 is disposed on the left and right sides of the seat assembly 2, and the two are symmetrical. The mechanical extension device 4 is connected to a complete extension mechanism through transverse tubes and drive tubes (not shown). The mechanism is assembled before leaving the factory and does not require the user to assemble it by himself. And the armrest base 5a in the armrest assembly 5 is pre-connected to the outer sides of the two mechanical extension devices 4 before leaving the factory. Specifically: the armrest base 5a is pre-set with a socket, and the armrest part 5b is pre-installed with inserts. During assembly, the armrest assembly 5 can be assembled by inserting the insert piece on the armrest portion 5b into the socket on the armrest base 5a; and, using this connection structure, the upper end of the socket 7 is located on the seat cushion assembly 3 below the surface.

The back frame 1 and the mechanical extension device 4 of the existing seat structure basically adopt a plug-in fit, but its structure is usually to install the insert 6 on the backrest support 4a at the rear end of the mechanical extension device 4, and the socket 7 is installed on the side. On the support body 1a; this will cause the upper end of the insert piece 6 to protrude upward above the seat surface. When the back frame 1 is a metal frame, the back frame 1 needs to be placed horizontally on the seat cushion assembly 3 during packaging; the rear end of the back frame 1 and the upper end of the insert 6 will interfere with each other up and down, thus affecting the packaging effect. Increase packaging difficulty. In the present invention, the socket 7 is installed on the backrest support part 4a at the rear end of the mechanical extension device 4, and the insert piece 6 is welded to the bottom of the side support 1 of the back frame 1. The slot 7a on the socket 7 extends from top to bottom, and the socket 7 and the connection base 9 are close together; while retaining the plug-in structure, after the socket 7 is installed, the upper end of the socket 7 will not exceed The back frame 1 can then be placed horizontally on the seat cushion assembly 3 for packaging and transportation. The back frame 1 and the socket 7 can be spaced up and down without interfering with each other. Therefore, the back frame 1 can be horizontally stacked on the seat cushion assembly 3 when meeting the requirements. While packaging and transporting, the plug-in structure between the back frame 1 and the mechanical extension device 3 is not changed; and the installation position of the socket 7 and the insert 6 is only changed, so that the installation height of the back frame 1 is not changed, and the structural design is ingenious .

As shown in Figure 3, the entire back frame 1 is made of metal square tubes; the insert 6 is arranged vertically downward, and the upper end of the insert 6 is provided with a long welding plate 8. The welding plate 8 and the insert 6 are integrally formed, and the structural processing is simple; and the width of the welding plate 8 matches the width of the side support 1a, and the welding plate 8 is fit and welded to the inside of the side support 1a, so that the structural connection is stable; so that The plug-in piece 6 can extend downward from the bottom end of the side support body 1a to facilitate the direct downward insertion of the back frame 1.

As shown in Figures 2-8, the connection base 9 has a vertical base plate 10, and the socket 7 is installed on the base plate 10. Specifically: the backrest support part 4a includes two first links 11 and two second links 12 spaced front and back. The first link 11 is located at the front end of the second link 12; and from front to back, the first link 11 is located at the front end of the second link 12; The first connecting rod 11 and the second connecting rod 12 are both inclined toward the rear and upward; a first mounting hole 11a is reserved on the first connecting rod 11, and a second mounting hole 12a is reserved on the second connecting rod 12. The connecting base 9 has a "cross"-shaped structure, and the connecting base 9 also includes connecting plates 13 located on the left and right sides of the base plate 10; when the connecting base 9 is installed with the mechanical extension device 4, the two The two connecting plates 13 are respectively rotatably connected to the first mounting hole 11a and the second mounting hole 12a; thus, the connecting base 9 is connected and fixed to the mechanical extension device 4, and the connection is convenient and stable. Furthermore: the first mounting hole 11a and the second mounting hole 12a are the mounting points used to connect to the bottom of the insert 6 in the existing structure. Then, without changing the structure, these two mounting holes can be rationally utilized. At the installation point, the connection base 9 for connecting the socket 7 is installed; this eliminates the need to change the structure of the rear end of the mechanical extension device 4 and ensures structural versatility. In addition, as shown in Figures 6 and 7, the connection base 9 is made of metal, which is high in strength and durable. Furthermore, transition sections 14 perpendicular to the base plate 10 are respectively provided on the left and right sides of the base plate 10 , and the connecting plate 13 is provided on the transition section 14 . The function of the transition section 14 is to connect the base plate 10 and the connecting plate. 13 are spaced apart along the width direction of the back frame 1, so that after the socket 7 is installed with the connection base 9, the socket 7 will be spaced left and right from the mechanical extension device 4 to prevent the socket 7 from interacting with the mechanical extension device 4 during the movement of the installation. If the iron frame interferes, it will not affect the function of the seat.

As shown in Figures 5-7, the socket 7 has a protruding positioning protrusion 7a, and the base plate 10 is correspondingly provided with a mounting countersunk hole 15; during installation, the socket 7 is attached to the base plate 10 on the top, and the positioning protrusion 7a is embedded in the mounting counterbore 15; and the socket 7 and the base plate 10 are fixedly connected with screws; the positioning protrusion 7a is a common industry component of the socket 7 itself, so that the base plate 10 can fit on the socket 7 The structure makes the two more closely connected. Then, by setting the connection base 9, the connection base 9 can be directly installed on the rear end of the mechanical extension device 4, with good versatility; thus the socket 7 can be further connected to the connection base 9; and the socket 7 and the connection base 9 are close together, so that the socket 7 does not protrude upward from the mechanical extension device 4 much, and it is easy to make the upper end of the socket 7 lower than the seat surface of the cushion assembly 3.

Using the seat connection structure of the present invention, the insert 6 can be easily welded to the back frame 1; without changing the structure of the backrest support 4a at the rear end of the mechanical extension device 4, the connection base 9 can also be easily installed on the back frame 1. The rear end of the mechanical extension device 4; the socket 7 can also be tightly connected to the connection base 9, so that the step of installing the socket 7 on the rear end of the mechanical extension device 4 is simple and convenient. In the existing seat structure in which the insert piece 6 is installed at the rear end of the mechanical extension device 4, since it is necessary to provide a connecting portion connected to the mechanical extension device 4 at the bottom of the insert piece 6, the upper end of the insert piece 6 will often exceed the height after installation. The seat surface of the seat cushion assembly 3 affects the packaging of the seat. However, the present invention, without changing the plug-in structure, changes the installation position of the socket 7 and the insert 6 so that after the socket 7 is installed on the connection base 10, the upper end of the socket 7 will be lower than the seat surface of the cushion assembly 3. The height difference between the upper end of the socket 7 and the seat surface after installation is between 1-10cm; and the connection structure is simple, just adjusting the installation position between the insert 6 and the socket 7 does not change the back frame 1 installation height and clever design. Therefore, when packaging the seat, as shown in Figure 9, the back frame 1 can be disassembled and stacked horizontally on the upper end of the seat cushion assembly 3, and the rear end of the back frame 1 and the upper end of the socket 7 will not interfere; and The armrest part 5b can be mechanically disassembled and stacked on the back frame 1; it is convenient for stacking and packaging of seats, saving packaging volume and increasing the cabinet capacity.

Claims

A mechanical extension device, including a footrest component, a seat cushion support component and a backrest component; characterized in that: the backrest component includes a backrest support part and a connection component provided on the backrest support part, and the connection component is configured to connect the backrest; The connection assembly includes a connection base installed on the backrest support part and a socket connected to the connection base. The slot on the socket extends from top to bottom, and the socket and the connection base are close to each other left and right; The backrest support part is preset with a first mounting hole and a second mounting hole spaced front and back; the front and rear ends of the connection base are rotationally connected to the first mounting hole and the second mounting hole respectively.
The mechanical stretching device according to claim 1, characterized in that: the connecting base has a "ten"-shaped structure, and the connecting base includes a vertical base plate and connecting plates located on the left and right sides of the base plate respectively; The base plate is configured to be connected to the socket; the connecting plate is configured to be connected to the backrest support part.
The mechanical extension device according to claim 2, characterized in that: the backrest support part includes two first connecting rods and a second connecting rod spaced front and back; the first mounting hole is provided on the first connecting rod, and the second connecting rod is The mounting hole is provided on the second connecting rod; the connecting plates on both sides of the connection base are respectively connected to the first mounting hole and the second mounting hole.
The mechanical stretching device according to claim 2, wherein there is a gap between the connecting plate and the base plate along the thickness direction of the connecting base.
The mechanical stretching device according to claim 4, wherein the left and right sides of the base plate are respectively provided with transition sections perpendicular to the base plate, and the connecting plate is arranged on the transition section.
The mechanical stretching device according to claim 1, wherein the socket and the connection base are detachably connected.
The mechanical extension device according to claim 2, characterized in that: the socket has a protruding positioning protrusion, and the base plate is correspondingly provided with a mounting countersunk hole; the socket is attached to the base plate to enable positioning The protrusions are embedded in the mounting counterbore; and the socket and the base plate are connected with screws.
A seat connection structure, characterized in that it includes: a back frame, a seat assembly and a mechanical extension device according to any one of claims 1 to 7; the back frame is a metal frame structure, and the back frame includes two parts located on the left and right sides respectively. The side support body on each side is provided with an insert that can be plugged and matched with the socket at the bottom of each side support body; the seat component includes a seat cushion component, and the mechanical extension device is mirrored on the left and right sides below the seat cushion component ; And the upper end of the socket is located below the seat surface of the cushion assembly.
The seat connection structure according to claim 8, wherein the height difference between the upper end of the socket and the seat surface of the seat cushion assembly is between 1-10 cm.
The seat connection structure according to claim 8, characterized in that: the back frame is made of metal square tubes; the upper end of the insert is provided with a long welding plate, and the welding plate is attached and welded to the side support the inside of the body.