Angle-variable chair frame and sofa

Abstract

According to the angle-variable chair frame and the sofa, a plurality of four-connecting-rod movement mechanisms are applied to the chair frame, a multi-section backrest is adopted, a back frame is responsible for a backrest part, a waist frame is responsible for a waist part, a back connecting rod and a waist connecting rod are matched, and a seat frame obliquely moves under the driving of a driving mechanism; the waist frame and the back frame are adjusted from a sitting posture state to a lying posture state, so that the movement forms of the backrest are richer, a user can adjust the supporting angles of the seat part, the waist part and the back part according to own requirements, and the chair frame structure is more intelligent and higher in comfort.

Description

Technical Field

[0001] The present invention relates to the technical field of seats, and in particular to a variable-angle chair frame and a sofa. Background Art

[0002] As the pace of society accelerates, people's life pressure is getting greater and greater. A comfortable chair is now a necessity for people. Most of the existing home or office chairs are ordinary seats with non-adjustable backrests. Even if there are adjustable backrests, the backrest can only be adjusted relative to the seat. The waist support is weak and the waist cannot be adjusted. This makes the user feel poor sitting, and it is not possible to adjust multiple comfortable angles according to the user's needs. Summary of the invention

[0003] The present invention aims at the deficiencies of the prior art and proposes a variable angle chair frame and sofa, thereby solving the problems that the prior art seat back has poor adjustment angle, weak lumbar support and non-adjustable lumbar angle, which makes the user's sitting feeling poor and cannot adjust to multiple comfortable angles according to user needs.

[0004] The present invention provides a variable angle chair frame, comprising a base, a backrest frame, a waist frame, a back connecting rod, a waist connecting rod, a seat frame and a driving mechanism;

[0005] A bracket and a connecting portion are arranged at intervals on the base, one end of the driving mechanism is hinged to the connecting portion, and a first hinge point and a second hinge point are arranged on the bracket;

[0006] The seat frame is used to support the user's buttocks, the waist frame is used to support the user's waist, and the backrest frame is used to support the user's back;

[0007] The front side of the seat frame is hinged to the first hinge point of the bracket, the rear side of the seat frame is provided with a first connection point and a second connection point at intervals, and the bottom of the seat frame is hinged to the other end of the driving mechanism;

[0008] The first end of the backrest frame is hinged to the first end of the waist frame, the second end of the backrest frame is hinged to one end of the back connecting rod, and the other end of the back connecting rod is hinged to the first connection point of the seat frame;

[0009] The second end of the waist frame is hinged to the second connection point of the seat frame, the third end of the waist frame is hinged to the first end of the waist connecting rod, and the second end of the waist connecting rod is hinged to the second hinge point of the base;

[0010] The driving mechanism extends to push the seat frame to rotate toward the back frame with the first hinge point as a fulcrum, so as to drive the lumbar frame, the lumbar connecting rod and the back connecting rod to rotate in the same direction; the rotation of the back connecting rod and the lumbar frame simultaneously drives the backrest frame to rotate in the same direction, so that the lumbar frame and the back frame change from a sitting state to a lying state.

[0011] In another aspect, the present invention further provides a sofa, comprising the above-mentioned variable-angle chair frame, wherein armrests are arranged on both sides of the chair frame.

[0012] By adopting the above-mentioned technical scheme, the present invention can achieve the following technical effects: compared with the prior art, the variable-angle chair frame and sofa use a multi-four-bar linkage movement mechanism on the chair frame and adopt a multi-section backrest. The back frame is responsible for the backrest, and the waist frame is responsible for the waist. In conjunction with the back connecting rod and the waist connecting rod, the seat frame tilts under the drive of the driving mechanism, and the waist frame and the back frame are adjusted from a sitting state to a lying state. This makes the movement form of the backrest more diverse, and the user can adjust the support angles of the seat, waist and back according to their own needs. The chair frame structure is more intelligent and more comfortable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 A schematic structural diagram of a variable angle chair frame according to an embodiment of the present invention is depicted;

[0015] Figure 2 Draws Figure 1 Another structural schematic diagram of a variable angle chair frame;

[0016] Figure 3 Draws Figure 1 A schematic diagram of an exploded structure of a variable angle chair frame;

[0017] Figure 4 Draws Figure 1 A schematic diagram of the structure of a first set of four-linkages of a variable angle chair frame;

[0018] Figure 5 Draws Figure 1 A schematic diagram of the structure of a second set of four-linkages of a variable angle chair frame;

[0019] Figure 6 Draws Figure 1A schematic structural diagram of a third set of four-linkages of a variable angle chair frame;

[0020] Figure 7 Draws Figure 1 A simplified schematic diagram of a multi-link variable angle chair frame;

[0021] Figure 8 Draws Figure 1 A schematic diagram of a changing state of a variable angle chair frame;

[0022] Fig. 9 Draws Figure 1 A schematic diagram of a complete state of a variable angle chair frame;

[0023] Reference numerals

[0024] 1-base, 2-backrest frame, 3-lumbar frame, 4-back connecting rod, 5-lumbar connecting rod, 6-seat frame, 7-driving mechanism, 11-bracket, 12-connecting part, 8-calf frame, 9-calf connecting rod, 31-limiting cross bar, a-first hinge point, b-second hinge point, c-first connecting point, d-second connecting point. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1-9 As shown, an embodiment of the present invention provides a variable angle chair frame, comprising a base 1, a backrest frame 2, a waist frame 3, a back connecting rod 4, a waist connecting rod 5, a seat frame 6 and a driving mechanism 7;

[0027] The base 1 is provided with a bracket 11 and a connecting portion 12 at intervals, one end of the driving mechanism 7 is hinged to the connecting portion 12, and the bracket 11 is provided with a first hinge point a and a second hinge point b;

[0028] The seat frame 6 is used to support the user's buttocks, the waist frame 3 is used to support the user's waist, and the backrest frame 2 is used to support the user's back;

[0029] The front side of the seat frame 6 is hinged to the first hinge point a of the bracket 11, the rear side of the seat frame 6 is provided with a first connection point c and a second connection point d at intervals, and the bottom of the seat frame 6 is hinged to the other end of the driving mechanism 7;

[0030] The first end of the backrest frame 2 is hinged to the first end of the waist frame 3, the other two ends of the backrest frame 6 are hinged to one end of the back connecting rod 4, and the other end of the back connecting rod 4 is hinged to the first connection point c of the seat frame 6;

[0031] The second end of the waist frame 3 is hinged to the second connection point d of the seat frame 6, the third end of the waist frame 3 is hinged to the first end of the waist connecting rod 5, and the second end of the waist connecting rod 5 is hinged to the second hinge point b of the base 1;

[0032] The driving mechanism 7 extends to push the seat frame 6 to rotate toward the back frame 2 with the first hinge point a as the fulcrum, so as to drive the lumbar frame 3, the lumbar connecting rod 5 and the back connecting rod 4 to rotate in the same direction; the rotation of the back connecting rod 4 and the lumbar frame 3 simultaneously drives the backrest frame 2 to rotate in the same direction, so that the lumbar frame 3 and the back frame 2 change from a sitting state to a lying state.

[0033] That is to say, the variable angle chair frame provided in the embodiment of the present invention uses a multi-four-bar linkage mechanism on the chair frame and adopts a multi-section backrest. The back frame is responsible for supporting the user's back, the lumbar frame is responsible for supporting the user's waist, and the seat frame is responsible for supporting the user's buttocks. In conjunction with the back connecting rod and the lumbar connecting rod, the seat frame tilts under the drive of the driving mechanism, and the lumbar frame and the back frame are adjusted from a sitting state to a lying state. This makes the movement form of the backrest more diverse, and the user can adjust the support angles of the seat, waist and back according to their own needs. The chair frame structure is more intelligent and more comfortable.

[0034] Furthermore, as an executable solution, Figure 1-3 As shown, it also includes a calf frame 8 and a calf connecting rod 9, one end of the calf connecting rod 9 is hinged to the third end of the waist connecting rod 5, and the other end is hinged to the calf frame 8, and the calf frame 8 is hinged to the front end of the seat frame 6;

[0035] The driving mechanism 7 extends to drive the waist link 5 to rotate with the second hinge point b as a fulcrum, so that the back link 4 and the waist frame 3 move to pull the calf link 9 to drive the calf frame 8 to lift up.

[0036] By setting the calf connecting rod and the calf pushing rod, the linkage between the chair frame reclining and the calf lifting can be realized, and the user can lie flat through a driving mechanism, which makes the chair frame cost lower and the lying position after the angle adjustment is more comfortable. Of course, a driving device such as a calf push rod can also be set separately to drive the calf to be lifted and lowered separately, so that when the back frame and the waist frame are lying flat, the leg and abdominal muscles can be stretched by controlling the calf frame to be lifted and lowered repeatedly, thereby achieving a massage effect.

[0037] It can be seen that in the variable angle chair frame provided by the embodiment of the present invention, the back frame, waist frame, seat frame and calf frame are all driven simultaneously by a push rod, so that the whole body angle of the spine, buttocks, thighs and calves can be adjusted, and the chair frame structure is more intelligent and more comfortable.

[0038] Specifically, Figure 4-7 As shown, the multi-link motion mechanism of the variable angle chair frame can be disassembled as follows.

[0039] like Figure 4 The first set of four-bar linkage is a four-bar linkage with a base 1 as a fixed part, two fixed hinge points a and a second hinge point b being set on the bracket 11 as the third link, the seat frame 6 being the first link, the waist frame 3 being the second link, and the waist link 5 being the fourth link.

[0040] like Figure 5 The second set of four-bar linkage is a second set of four-bar linkage with the seat frame 6 as the first link, the waist frame 3 as the second link, the back frame 2 as the third link, and the back link 4 as the fourth link. It shares two links of the first set of four-bar linkage, so it can be linked with the first set of four-bar linkage.

[0041] like Figure 6 The third set of four-bar linkage is a third set of four-bar linkage with the seat frame 6 as the first link, the waist link 5 as the second link, the calf link 9 as the third link, and the calf frame 8 as the fourth link. It shares the two links of the first set of four-bar linkage, so it can be linked with the first set of four-bar linkage.

[0042] like Figure 3 Shown

[0043] Three sets of four-bar linkages can achieve the overall multi-angle coordinated movement of the back, waist, buttocks, thighs and calves under the drive of a push rod. In addition, for the convenience of understanding, a simple four-bar linkage diagram can be shown as follows Figure 7 shown.

[0044] Furthermore, if a four-bar linkage is added to the back, it can also form a head support and provide an additional set of joint movements in the neck.

[0045] Furthermore, if Figure 1 As shown, a limiting cross bar 31 is also provided on the waist frame 3 , and the limiting cross bar 31 limits the flipping angle of the back frame 2 .

[0046] The flipping angles of the waist frame and the back frame are controlled by the driving mechanism, but for double insurance, for example, when the user is heavy, a limit cross bar can be set to ensure that the upper backrest frame will not flip over and fall backwards, further ensuring the safety of the user.

[0047] Further, in one example, Figure 3 As shown, the level of the second hinge point b is higher than that of the first hinge point a. The level of the first connection point c is higher than that of the second connection point d.

[0048] Further, in one example, Fig. 9 As shown, it also includes a back pad 51, a waist pad 52, a seat pad 53 and a calf pad 54. The back pad is fixed to the back frame 2, the waist pad is fixed to the waist frame 3, the seat pad is fixed to the top of the seat frame 6, and the calf pad is fixed to the calf frame. Each back pad can be filled with a relatively soft and elastic filler, so that the user will be more comfortable when using it.

[0049] Furthermore, in one example, massage airbags are arranged in the back cushion, the waist cushion and the seat cushion. An air pump and an air valve are arranged on the corresponding chair frame and connected to each massage airbag. The airbags can be repeatedly inflated and deflated to squeeze and massage the user's body parts.

[0050] Furthermore, in one example, massage discs are arranged in the back cushion, the waist cushion and the seat cushion, and a control device is arranged on the corresponding chair frame to control the rotation of the massage discs, and convex points are arranged on the massage discs to provide rotational friction massage to the user.

[0051] Furthermore, in one example, the driving mechanism is any one of a push rod, an airbag assembly, an air cylinder, and an oil cylinder.

[0052] The following is combined with Figure 1-9 The installation relationship and working principle of the variable angle chair frame of the present invention are described in detail.

[0053] 1. The specific installation relationship is as follows: the seat frame 6 is used to support the user's buttocks, the lumbar frame 3 is used to support the user's waist, and the backrest frame 2 is used to support the user's back; a bracket 11 and a connecting portion 12 are arranged at intervals on the base 1, one end of the driving mechanism 7 is hinged to the connecting portion 12, and a first hinge point a and a second hinge point b are arranged on the bracket 11; the front side of the seat frame 6 is hinged to the first hinge point a of the bracket 11, and the rear side of the seat frame 6 is spaced apart from a first connection point c and a second connection point d, and the bottom of the seat frame 6 is hinged to the other end of the driving mechanism 7; the first end of the backrest frame 2 is hinged to the first end of the lumbar frame 3, and the other two ends of the backrest frame 2 are hinged to the back One end of the connecting rod 4 is hinged, and the other end of the back connecting rod 4 is hinged to the first connection point c of the seat frame 6; the second end of the lumbar frame 3 is hinged to the second connection point d of the seat frame 6, the third end of the lumbar frame 3 is hinged to the first end of the lumbar connecting rod 5, and the second end of the lumbar connecting rod 5 is hinged to the second hinge point b of the base 1; the driving mechanism 7 extends to push the seat frame 6 to rotate toward the back frame 2 with the first hinge point a as the fulcrum, so as to drive the lumbar frame 3, the lumbar connecting rod 5 and the back connecting rod 4 to rotate in the same direction; the rotation of the back connecting rod 4 and the lumbar frame 3 simultaneously drives the backrest frame 2 to rotate in the same direction, so that the lumbar frame 3 and the back frame 2 change from a sitting state to a lying state. One end of the calf link 9 is hinged to the third end of the waist link 5, and the other end is hinged to the calf frame 8. The calf frame 8 is hinged to the front end of the seat frame 6; the driving mechanism 7 extends to drive the waist link 5 to rotate with the second hinge point b as the fulcrum, so that the back link 4 and the waist frame 3 move, thereby pulling the calf link 9 to drive the calf frame 8 to lift.

[0054] The working movement principle is as follows: The multi-four-bar linkage analysis is as follows: As shown in the figure, the first set of four-bar linkages is composed of the first hinge point a and the second hinge point b of the base bracket 11, the seat frame 6, the waist link 5, and the waist frame 3, and the driving mechanism (push rod) 7 drives the seat frame 6.

[0055] The second set of four-linkages is composed of a seat frame 6, a back link 4, a waist frame 3, and a back frame 2.

[0056] The third set of four-linkages is composed of a seat frame 6, a calf frame 8, a calf link 9, and a waist link 5.

[0057] The cross-sectional motion state is as follows Figure 8 As shown, the first set of four-link motion drives the second and third sets of four-link motions at the same time, and the overall trend is that the backrest, waist, and seat lean back at different angles, and the calves lift upwards, so that multiple joints can move.

[0058] In this way, a multi-four-bar linkage mechanism is used on the chair frame, a multi-section backrest is adopted, and a back link and a lumbar link are coordinated. The seat frame tilts under the drive of the driving mechanism, and the lumbar frame and the back frame are adjusted from a sitting state to a lying state. This makes the movement form of the backrest more diverse, and the user can adjust the support angles of the seat, waist and back according to their own needs. The chair frame structure is more intelligent and more comfortable.

[0059] Furthermore, the present embodiment also includes a sofa, including the above-mentioned variable angle chair frame, wherein armrests are arranged on both sides of the chair frame. The backrest is divided into two sections, the waist frame is responsible for supporting the waist, and the back frame is responsible for supporting the back. The movement form of the backrest is more abundant, and the shape can be a massage chair or an ordinary sofa.

[0060] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0061] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A variable angle chair frame, characterized in that: It includes a base, a backrest frame, a waist frame, a back connecting rod, a waist connecting rod, a seat frame and a driving mechanism; A bracket and a connecting portion are arranged at intervals on the base, one end of the driving mechanism is hinged to the connecting portion, and a first hinge point and a second hinge point are arranged on the bracket; The seat frame is used to support the user's buttocks, the waist frame is used to support the user's waist, and the backrest frame is used to support the user's back; The front side of the seat frame is hinged to the first hinge point of the bracket, the rear side of the seat frame is provided with a first connection point and a second connection point at intervals, and the bottom of the seat frame is hinged to the other end of the driving mechanism; The first end of the backrest frame is hinged to the first end of the waist frame, the second end of the backrest frame is hinged to one end of the back connecting rod, and the other end of the back connecting rod is hinged to the first connection point of the seat frame; The second end of the waist frame is hinged to the second connection point of the seat frame, the third end of the waist frame is hinged to the first end of the waist connecting rod, and the second end of the waist connecting rod is hinged to the second hinge point of the base; The driving mechanism extends to push the seat frame to rotate toward the back frame with the first hinge point as a fulcrum, so as to drive the lumbar frame, the lumbar connecting rod and the back connecting rod to rotate in the same direction; the rotation of the back connecting rod and the lumbar frame simultaneously drives the backrest frame to rotate in the same direction, so that the lumbar frame and the back frame change from a sitting state to a lying state.

2. The variable angle chair frame according to claim 1, characterized in that: It also includes a calf frame and a calf connecting rod, one end of the calf connecting rod is hinged to the third end of the waist connecting rod, and the other end is hinged to the calf frame, and the calf frame is hinged to the front end of the seat frame; The driving mechanism extends to drive the waist link to rotate with the second hinge point as a fulcrum, so that the back link and the waist frame move to pull the calf link to drive the calf frame to lift.

3. The variable angle chair frame according to claim 1, characterized in that: The waist frame is also provided with a limit cross bar, and the limit cross bar limits the flipping angle of the back frame.

4. The variable angle chair frame according to claim 1, characterized in that: The level of the second hinge point is higher than the level of the first hinge point.

5. The variable angle chair frame according to claim 1, characterized in that: The level of the first connection point is higher than the level of the second connection point.

6. The variable angle chair frame according to claim 1, characterized in that: It also includes a back pad, a waist pad and a seat pad. The back pad is fixed on the back frame, the waist pad is fixed on the waist frame, and the seat pad is fixed on the top of the seat frame.

7. The variable angle chair frame according to claim 6, characterized in that: Massage airbags are arranged in the back cushion, the waist cushion and the seat cushion.

8. The variable angle chair frame according to claim 6, characterized in that: Massage discs are arranged in the back cushion, the waist cushion and the seat cushion.

9. The variable angle chair frame according to claim 1, characterized in that: The driving mechanism is any one of a push rod, an air bag assembly, an air cylinder, and an oil cylinder.

10. A sofa, characterized in that: It comprises the variable angle chair frame as described in claims 1-9, wherein armrests are arranged on both sides of the chair frame.

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