Headrest backrest linkage mechanism and sofa

Abstract

The utility model provides a headrest backrest linkage mechanism and a sofa. The headrest and backrest linkage mechanism comprises a base, a seat frame assembly, a backrest assembly, a headrest driving assembly, a headrest connecting rod assembly and a headrest frame. The seat frame assembly is arranged on the base and connected with the base. The backrest assembly is detachably connected to the upper portion of the rear end of the seat frame assembly. One end of the headrest driving assembly is connected with the seat frame assembly, the other end of the headrest driving assembly is detachably connected with the headrest connecting rod assembly, and the headrest connecting rod assembly is connected with the backrest assembly and the headrest frame. The backrest assembly and the seat frame assembly are disassembled, and the headrest driving assembly and the headrest connecting rod assembly are disassembled, so that the backrest assembly and the headrest frame are quickly disassembled and assembled.

Description

Technical Field

[0001] This application relates to the field of sofa technology, and in particular to a headrest backrest linkage mechanism and a sofa. Background Technology

[0002] As a common type of home furniture, sofas have evolved over many years from simple seating into multifunctional pieces that combine comfort, functionality, and aesthetics. Modern sofas are not only increasingly diverse in materials and designs, but also incorporate various intelligent functions such as adjustable backrests and headrests to meet the growing personalized needs of consumers.

[0003] To enhance usability, existing sofas often feature headrests with lifting capabilities, allowing the head to be raised at a certain angle when reclining. These headrests typically use motors and linkages to achieve this function, which not only increases the weight of the backrest but also incurs high operating costs and is inconvenient to disassemble and install.

[0004] Therefore, it is necessary to design a headrest and backrest linkage mechanism and a sofa to solve the above-mentioned technical problems. Utility Model Content

[0005] This application provides a headrest and backrest linkage mechanism and a sofa, which facilitates quick assembly and disassembly.

[0006] According to a first aspect of the embodiments of this specification, a headrest backrest linkage mechanism is provided, comprising a base, a seat frame assembly, a backrest assembly, a headrest drive assembly, a headrest linkage assembly, and a headrest frame; the seat frame assembly is disposed on the base and connected to the base; the backrest assembly is detachably connected to the upper rear end of the seat frame assembly; one end of the headrest drive assembly is connected to the seat frame assembly, and the other end of the headrest drive assembly is detachably connected to the headrest linkage assembly; the headrest linkage assembly is connected to the backrest assembly and the headrest frame respectively.

[0007] Furthermore, the seat frame assembly includes a side plate, a backrest linkage piece, a backrest connector, and a backrest connecting rod; the backrest connector is connected to the upper end of the backrest connecting rod and the side plate respectively, and the backrest linkage piece is connected to the lower end of the backrest connecting rod and the side plate respectively; the side plate, the backrest linkage piece, the backrest connector, and the backrest connecting rod form a four-bar linkage mechanism.

[0008] Furthermore, the backrest assembly includes a backrest frame and a connector, the backrest connector being detachably connected to the connector, and the connector being connected to the inside of the backrest frame.

[0009] Further, the headrest driving assembly comprises a headrest driving member, a first headrest connecting rod, a second headrest connecting rod and a first connecting rod inserting plate connected in sequence; the headrest driving member is connected to the side plate; the first connecting rod inserting plate is detachably connected to the headrest connecting rod assembly; and the middle part of the second headrest connecting rod is connected to the backrest connecting member.

[0010] Further, the headrest connecting rod assembly comprises a second connecting rod inserting plate, a third headrest connecting rod, a fourth headrest connecting rod and a headrest mounting member connected in sequence; the second connecting rod inserting plate is detachably connected to the first connecting rod inserting plate; and the headrest mounting member is connected to the inner side of the headrest frame.

[0011] Further, the middle part of the second connecting rod inserting plate is provided with a clamping nail, and the first connecting rod inserting plate is provided with an arc-shaped groove matched with the clamping nail; and the end part of the second connecting rod inserting plate is connected to the middle part of the first connecting rod inserting plate through a butterfly screw.

[0012] Further, the backrest assembly comprises a mounting sheet connected to the inner side of the backrest assembly; the headrest mounting member is connected to the upper part of the mounting sheet; and the third headrest connecting rod is connected to the lower part of the mounting sheet.

[0013] Further, the end part of the mounting sheet close to the headrest frame is provided with a limiting nail; and the headrest mounting member comprises a first mounting part connected to the headrest driving assembly and a second mounting part connected to the headrest frame.

[0014] In the TV posture, the limiting nail abuts against the second mounting part; and in the lying posture, the limiting nail abuts against the first mounting part.

[0015] Further, the second connecting rod inserting plate is provided with a bending part away from the side of the backrest assembly; and the end part of the bending part close to the headrest driving assembly is away from the backrest assembly.

[0016] Further, in the process of switching from the TV posture to the lying posture, the included angle between the backrest connecting member and the backrest connecting rod increases.

[0017] Further, in the process of switching from the TV posture to the lying posture, the adjacent two edges of the headrest frame and the backrest frame form an included angle a, and the range of the included angle a is 4°-50°.

[0018] According to a second aspect of the embodiments of the present specification, a sofa is provided, comprising the headrest-backrest linkage mechanism of the first aspect.

[0019] The application has the following beneficial effects: the backrest assembly is detachably connected to the seat frame assembly, and the headrest driving assembly is detachably connected to the headrest connecting rod assembly. Further, by detaching the backrest assembly from the seat frame assembly and the headrest driving assembly from the headrest connecting rod assembly, the backrest assembly and the headrest frame can be quickly disassembled.

[0020] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present specification. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings incorporated into the specification and forming part thereof show embodiments consistent with the present specification and serve to explain the principles of the present specification together with the specification.

[0022] Figure 1 is a perspective view of the sofa of the present application in a TV posture;

[0023] Figure 2 is a partial schematic view of the sofa of the present application in a TV posture;

[0024] Figure 3 is a connection schematic view of the headrest driving assembly and part of the backrest assembly of the sofa of the present application in a TV posture;

[0025] Figure 4 is a connection schematic view of the headrest connecting rod assembly and part of the backrest assembly and the headrest frame of the sofa of the present application in a TV posture;

[0026] Figure 5 is a partial schematic view of the sofa of the present application in a lying posture;

[0027] Figure 6 is a connection schematic view of the headrest driving assembly and part of the backrest assembly of the sofa of the present application in a lying posture;

[0028] Figure 7 is a connection schematic view of the headrest connecting rod assembly and part of the backrest assembly and the headrest frame of the sofa of the present application in a lying posture.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 10 - base;

[0031] 20 - seat frame assembly; 21 - side plate; 22 - backrest linkage piece; 23 - backrest connecting piece; 24 - backrest connecting rod;

[0032] 30 - backrest assembly; 31 - backrest frame; 32 - plug-in piece; 33 - mounting piece; 34 - limiting pin;

[0033] 40 - headrest driving assembly; 41 - headrest driving member; 42 - first headrest connecting rod; 43 - second headrest connecting rod; 44 - first connecting rod inserting plate; 45 - arc-shaped groove; 46 - butterfly screw; 47 - clamping nail;

[0034] 50 - headrest connecting rod assembly; 51 - second connecting rod inserting plate; 511 - bending part; 52 - third headrest connecting rod; 53 - fourth headrest connecting rod; 54 - headrest mounting member; 541 - first mounting part; 542 - second mounting part;

[0035] 60 - headrest frame. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments (or modes) of the present application will be described clearly and completely in combination with the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0037] If the application embodiments involve directional indications or positional relationships (such as up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships, movement conditions, etc. between components in a certain specific posture (as shown in the drawings); if the specific posture changes, the directional indications or positional relationships also change accordingly. In addition, the terms "first", "second", etc. in the application embodiments are only used for convenience of description, and cannot be understood as indicating or implying relative importance.

[0038] Next, the embodiments of the present application will be described in detail.

[0039] Referring to Figure 1 As shown in the drawings, the present application discloses a headrest backrest linkage mechanism, which comprises a base 10, a seat frame assembly 20, a backrest assembly 30, a headrest driving assembly 40, a headrest connecting rod assembly 50 and a headrest frame 60. The seat frame assembly 20 is arranged on and connected with the base 10. The backrest assembly 30 is detachably connected above the rear end of the seat frame assembly 20. One end of the headrest driving assembly 40 is connected with the seat frame assembly 20, and the other end of the headrest driving assembly 40 is detachably connected with the headrest connecting rod assembly 50, and the headrest connecting rod assembly 50 is connected with the backrest assembly 30 and the headrest frame 60, respectively.

[0040] The present application drives the seat frame assembly 20 to rotate through the driving member (not shown in the drawings) arranged on the seat frame assembly 20, and further drives the backrest assembly 30, the headrest driving assembly 40, the headrest connecting rod assembly 50 and the headrest frame 60 to rotate, thereby realizing the switching between the TV posture and the lying posture.

[0041] Please continue to refer to Figures 2-7 As shown in the drawings, the seat frame assembly 20 comprises a side plate 21, a backrest linkage plate 22, a backrest connecting piece 23 and a backrest connecting rod 24. The backrest connecting piece 23 is arranged in a T shape.

[0042] The short side of the backrest connecting piece 23 is connected to the upper end of the side plate 21 and the backrest connecting rod 24 respectively, and the lower end of the backrest connecting rod 24 and the side plate 21 are connected to the backrest linkage plate 22 respectively. The side plate 21, the backrest linkage plate 22, the backrest connecting piece 23 and the backrest connecting rod 24 form a four-bar linkage mechanism. Through the linkage of the four-bar linkage mechanism, unnecessary friction or jamming can be avoided, and the stability and flexibility of the operation process can be ensured.

[0043] During the process of switching the TV posture state to the lying posture state, the included angle between the backrest connecting piece 23 and the backrest connecting rod 24 increases, the short side of the backrest connecting piece 23 rotates upward, and at the same time, the short side of the backrest connecting piece 23 rotates downward, thereby enabling the backrest assembly 30 connected to the backrest connecting piece 23 to lie flat.

[0044] The backrest assembly 30 comprises a backrest frame 31, a plug-in piece 32 and a mounting plate 33. The backrest frame 31 is in the form of a long strip-shaped plate structure, and the plug-in piece 32 and the mounting plate 33 are arranged on the inner side of the backrest frame 31. Here, the inner side refers to the outer space of the sofa.

[0045] The backrest frame 31 is located below the headrest frame 60, and the backrest frame 31 is arranged in a spaced manner with the headrest frame 60, and the two are rotated through the headrest drive assembly 40 and the headrest connecting rod assembly 50 respectively. The side of the backrest frame 31 and the headrest frame 60 are located on the same plane, thereby making the outer side of the headrest backrest linkage mechanism overall neat and beautiful. Here, the plane refers to a vertical plane.

[0046] The plug-in piece 32 is fixed to the backrest frame 31 and located at the lower end of the backrest frame 31. In some cases, in order to adapt to the installation position of the plug-in piece 32, a plastic pad is also arranged between the plug-in piece 32 and the backrest frame 31. The backrest connecting piece 23 is detachably connected to the plug-in piece 32, so as to facilitate the disassembly and assembly between the seat frame assembly 20 and the backrest assembly 30.

[0047] The mounting plate 33 is fixed to the backrest frame 31 and located at the upper end of the backrest frame 31. In some cases, in order to increase the installation stability of the mounting plate 33 and the backrest frame 31, a part of the mounting plate 33 is fixed to the backrest frame 31, and the other part is away from the backrest frame 31 to realize the installation with other components. The end of the mounting plate 33 close to the headrest frame 60 is provided with a limiting nail 34.

[0048] The headrest driving assembly 40 comprises a headrest driving member 41, a first headrest connecting rod 42, a second headrest connecting rod 43 and a first connecting rod inserting plate 44 connected in sequence by screws. The headrest driving member 41 is connected to the side plate 21, the first connecting rod inserting plate 44 is detachably connected to the headrest connecting rod assembly 50, and the middle part of the second headrest connecting rod 43 is connected to the backrest connecting member 23.

[0049] The headrest driving member 41 is fixed by using two mounting holes on the side plate 21, which simplifies the design and assembly process and reduces the manufacturing cost.

[0050] The headrest connecting rod assembly 50 comprises a second connecting rod inserting plate 51, a third headrest connecting rod 52, a fourth headrest connecting rod 53 and a headrest mounting member 54 connected in sequence by screws. The second connecting rod inserting plate 51 is detachably connected to the first connecting rod inserting plate 44, and the headrest mounting member 54 is connected to the inner side of the headrest frame 60. Among them, the third headrest connecting rod 52, the fourth headrest connecting rod 53, the headrest mounting member 54 and the mounting sheet 33 form a four-bar linkage mechanism.

[0051] The second connecting rod inserting plate 51 is provided with a bent part 511 away from one side of the backrest assembly 30. The end of the bent part 511 close to the headrest driving assembly 40 is away from the backrest assembly 30, so that the headrest driving assembly 40 and the seat frame assembly 20 connected to the headrest driving assembly 40 can be arranged on the inner side, and the overall structure of the headrest and backrest linkage mechanism is more compact.

[0052] The middle part of the second connecting rod inserting plate 51 is provided with a clamping nail 47, and one end of the first connecting rod inserting plate 44 is provided with an arc-shaped groove 45 matched with the clamping nail 47, so as to realize the precise positioning between the second connecting rod inserting plate 51 and the first connecting rod inserting plate 44, and prevent the position of the components from being deviated during assembly.

[0053] The end of the second connecting rod inserting plate 51 and the middle part of the first connecting rod inserting plate 44 are connected by a butterfly screw 46. The user can realize the disassembly and assembly between the second connecting rod inserting plate 51 and the first connecting rod inserting plate 44 by manually tightening and loosening, which simplifies the disassembly and assembly process and can greatly improve the work efficiency.

[0054] The headrest mounting member 54 comprises a first mounting part 541 connected to the headrest driving assembly 40 and a second mounting part 542 connected to the headrest frame 60, and the first mounting part 541 and the second mounting part 542 form an obtuse angle and are circularly arc transitioned. In the TV posture state, the limiting nail 34 abuts against the second mounting part 542, and in the lying posture state, the limiting nail 34 abuts against the first mounting part 541.

[0055] The opening angle and folding position between the headrest frame 60 and the backrest frame 31 can be limited by the design of the limiting nails 34. In the process of switching from the TV posture state to the lying posture state, the adjacent two edges of the headrest frame 60 and the backrest frame 31 form an included angle a, and the range of the included angle is 4°-50°. Among them, the angle a in the TV posture state is smaller than the angle a in the lying posture state.

[0056] In the application, the backrest assembly 30 is detachably connected to the seat frame assembly 20, and the headrest driving assembly 40 is detachably connected to the headrest connecting rod assembly 50. Then, by detaching the backrest assembly 30 and the seat frame assembly 20, and detaching the headrest driving assembly 40 and the headrest connecting rod assembly 50, the quick disassembly and assembly of the backrest assembly 30 and the headrest frame 60 can be realized, which is convenient for transportation.

[0057] In the application, the headrest driving member 41 is stretched forward by the side plate 21, and the second headrest connecting rod 43 is rotated by a certain angle by the stretching of the side plate 21, thereby driving the first connecting rod plug plate 44 and the headrest connecting rod assembly 50 to rotate, so that the backrest assembly 30 and the headrest frame 60 are opened to a certain angle, and the linkage function is realized.

[0058] The application discloses a sofa including the headrest-backrest linkage mechanism. The sofa has simple structure, low production cost, high production efficiency, and can be quickly disassembled and assembled. After the plug-in part 32 is installed in the backrest frame 31, the headrest driving assembly 40 and the headrest connecting rod assembly 50 can be disassembled and assembled by manually tightening and loosening the butterfly screw 46, which is convenient.

[0059] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the application is not limited to the precise structure described in the above embodiments and shown in the drawings; any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application should be included in the scope of protection of the application.

Claims

1. A headrest backrest linkage mechanism, characterized in that, It includes a base, a seat frame assembly, a backrest assembly, a headrest driving assembly, a headrest connecting rod assembly and a headrest frame; the seat frame assembly is arranged on and connected with the base; the backrest assembly is detachably connected above the rear end of the seat frame assembly; one end of the headrest driving assembly is connected with the seat frame assembly, and the other end of the headrest driving assembly is detachably connected with the headrest connecting rod assembly, and the headrest connecting rod assembly is connected with the backrest assembly and the headrest frame respectively.

2. The headrest and backrest linkage mechanism according to claim 1, wherein the seat frame assembly comprises side plates, a backrest linkage piece, a backrest connecting piece and a backrest connecting rod; the backrest connecting piece is connected with the backrest connecting rod and the upper end of the side plate respectively, and the backrest linkage piece is connected with the backrest connecting rod and the lower end of the side plate respectively; the side plate, the backrest linkage piece, the backrest connecting piece and the backrest connecting rod form a four-bar linkage mechanism.

3. The headrest and backrest linkage mechanism according to claim 2, wherein the backrest assembly comprises a backrest frame and a plug-in piece, the backrest connecting piece is detachably connected on the plug-in piece, and the plug-in piece is connected on the inner side of the backrest frame.

4. The headrest and backrest linkage mechanism according to claim 2, wherein the headrest driving assembly comprises a headrest driving piece, a first headrest connecting rod, a second headrest connecting rod and a first connecting rod plug-in plate connected in sequence; the headrest driving piece is connected with the side plate, the first connecting rod plug-in plate is detachably connected with the headrest connecting rod assembly, and the middle part of the second headrest connecting rod is connected with the backrest connecting piece.

5. The headrest and backrest linkage mechanism according to claim 4, wherein the headrest connecting rod assembly comprises a second connecting rod plug-in plate, a third headrest connecting rod, a fourth headrest connecting rod and a headrest mounting piece connected in sequence; the second connecting rod plug-in plate is detachably connected with the first connecting rod plug-in plate; and the headrest mounting piece is connected with the inner side of the headrest frame.

6. The headrest and backrest linkage mechanism according to claim 5, wherein the middle part of the second connecting rod plug-in plate is provided with a clamping nail, the first connecting rod plug-in plate is provided with an arc-shaped groove matched with the clamping nail; and the end part of the second connecting rod plug-in plate is connected with the middle part of the first connecting rod plug-in plate through a butterfly screw.

7. The headrest and backrest linkage mechanism according to claim 5, wherein the backrest assembly comprises a mounting piece, the mounting piece is connected with the inner side of the backrest assembly, the headrest mounting piece is connected with the upper part of the mounting piece, and the third headrest connecting rod is connected with the lower part of the mounting piece.

8. The headrest and backrest linkage mechanism according to claim 7, wherein the mounting piece is provided with a limiting nail near the end part of the headrest frame, the headrest mounting piece comprises a first mounting part connected with the headrest driving assembly and a second mounting part connected with the headrest frame; in a TV posture, the limiting nail abuts against the second mounting part, and in a lying posture, the limiting nail abuts against the first mounting part.

9. The headrest and backrest linkage mechanism according to claim 5, wherein The second connecting rod plate is provided with a bending part away from the backrest assembly, and the bending part is away from the backrest assembly at one end close to the headrest driving assembly.

10. The headrest and backrest linkage mechanism according to claim 2, characterized in that, During the process of switching from the TV posture to the lying posture, the included angle between the backrest connecting piece and the backrest connecting rod increases.

11. The headrest and backrest linkage mechanism according to claim 3, characterized in that, During the process of switching from the TV posture to the lying posture, the adjacent two edges of the headrest frame and the backrest frame form an included angle a, and the included angle a ranges from 4° to 50°.

12. A sofa, characterized in that The headrest and backrest linkage mechanism according to any one of claims 1-11.

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