Angle-variable chair frame and sofa
By designing a multi-stage adjustment structure of a variable angle chair frame, the problems of insufficient adjustment angle and insufficient lumbar support of the existing seat back are solved, and the multi-stage adjustment and comfort of the chair frame are improved, providing a richer user experience .
Patent Information
- Application Number
- CN202310829109.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-07
- Publication Date
- 2025-01-07
AI Technical Summary
The existing seat back adjustment angle is poor, the lumbar support is insufficient, and the variety of comfort angles cannot be adjusted according to the needs of the user, resulting in poor sitting feeling for the user.
A variable angle chair frame is designed, including a seat frame, an upper backrest frame, a lower backrest frame, a driving mechanism and a connecting rod. Through the setting of hinges and the coordination of the driving mechanism, the multi-stage adjustment of the chair frame is realized, so that the upper Both the backrest frame and the lower backrest frame can be adjusted, and the calf connecting rod and calf top rod can be used to achieve the inverted back and lift of the chair frame, enhancing the intelligence and comfort of the chair frame.
The multi-stage adjustment of the chair frame is realized, enriching the backrest movement form. Users can adjust the support angles of the waist and back according to their needs, improving the comfort and intelligence of the chair frame, with lower costs and more comfortable lying posture.
Smart Images
Figure CN119257387A_ABST
Abstract
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 seat frame, an upper backrest frame, a lower backrest frame, a driving mechanism and a connecting rod; the seat frame is provided with a seat plate;
[0005] The bottom of the upper backrest frame and the first end of the lower backrest frame are hinged at a first hinge point, and the second end of the lower backrest frame and the top of the seat frame are hinged at a second hinge point; one end of the connecting rod is hinged at a third hinge point at the bottom of the upper backrest frame, and the other end of the connecting rod is hinged at a fourth hinge point at the top of the seat frame; the second end of the lower backrest frame is arranged close to the seat plate;
[0006] One end of the driving mechanism is hinged to the bottom of the seat frame, and the other end is hinged to the third end of the lower backrest frame; wherein the first hinge point and the third hinge point are not overlapped, and the second hinge point and the fourth hinge point are not overlapped;
[0007] The driving mechanism drives the lower backrest frame to rotate downward around the second hinge point, and pulls the connecting rod to rotate around the fourth hinge point. The two together pull the upper backrest frame to rotate and move downward, so that the chair frame changes from a sitting state to a lying state.
[0008] Furthermore, an embodiment of the present invention also provides a sofa, comprising the above-mentioned variable-angle chair frame, wherein armrests are arranged on both sides of the chair frame.
[0009] By adopting the above-mentioned technical scheme, the present invention can achieve the following technical effects: compared with the prior art, the chair frame provided by the present invention segments the back part into the back part and the waist part by setting a separate lower backrest frame and a connecting rod, and realizes a three-section chair frame in conjunction with the seat part, and realizes that both the lower backrest frame and the upper backrest frame can be adjusted through the driving mechanism and the connecting rod, so that the movement forms of the backrest are more diverse, and the user can adjust the support angles of the waist and back according to their own needs. The chair frame structure is more intelligent and more comfortable. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] 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 paying creative work.
[0011] Figure 1 A schematic structural diagram of a variable angle chair frame according to an embodiment of the present invention is depicted;
[0012] Figure 2 Draws Figure 1 A schematic diagram of the internal structure of a variable angle chair frame;
[0013] Figure 3 Draws Figure 1 A schematic diagram of a cross-sectional structure of a variable angle chair frame;
[0014] Figure 4 Draws Figure 1 A schematic diagram of an exploded structure of a variable angle chair frame;
[0015] Figure 5 Draws Figure 1 A schematic diagram of a changing state of a variable angle chair frame;
[0016] Figure 6 Draws Figure 1 Another structural schematic diagram of a variable angle chair frame;
[0017] Figure 7 Draws Figure 6 A schematic diagram of a changing state of a variable angle chair frame;
[0018] Reference numerals
[0019] 1-seat frame, 2-upper backrest frame, 3-lower backrest frame, 4-driving mechanism, 5-connecting rod, a-first hinge point, c-third hinge point, b-second hinge point, d-fourth hinge point, 6-calf iron frame, 61-calf connecting rod, 62-calf top rod, 31-limiting cross bar, 71-upper backrest pad, 72-lower backrest pad, 73-seat cushion, 74-calf pad. DETAILED DESCRIPTION
[0020] 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.
[0021] like Figure 1-7 As shown, an embodiment of the present invention provides a variable angle chair frame, comprising a seat frame 1, an upper backrest frame 2, a lower backrest frame 3, a driving mechanism 4 and a connecting rod 5; a seat plate is provided at the top of the seat frame 1;
[0022] The bottom of the upper backrest frame 2 is hinged to the first end of the lower backrest frame 3 at a first hinge point a, and the second end of the lower backrest frame 3 is hinged to the top of the seat frame 1 at a second hinge point b; one end of the connecting rod 5 is hinged to the third hinge point c at the bottom of the upper backrest frame 2, and the other end of the connecting rod 5 is hinged to the top of the seat frame 1 at a fourth hinge point d; the second end of the lower backrest frame 3 is arranged close to the seat plate;
[0023] One end of the driving mechanism 4 is hinged to the bottom of the seat frame 1, and the other end is hinged to the third end of the lower backrest frame 3; wherein the first hinge point a and the third hinge point c are not overlapped, and the second hinge point b and the fourth hinge point d are not overlapped;
[0024] The driving mechanism 4 drives the lower backrest frame 3 to rotate downward around the second hinge point b, and pulls the connecting rod 5 to rotate at the fourth hinge point d. The two together pull the upper backrest frame 2 to rotate and move downward, so that the chair frame changes from a sitting state to a lying state.
[0025] That is to say, the chair frame provided by the present invention divides the back portion into the back portion and the waist portion by setting a separate lower backrest frame and a connecting rod, and realizes a three-section chair frame in conjunction with the seat portion, and realizes that both the lower backrest frame and the upper backrest frame can be adjusted through the driving mechanism and the connecting rod, so that the movement forms of the backrest are more diverse, and the user can adjust the support angles of the waist and back according to their own needs. The chair frame structure is more intelligent and more comfortable.
[0026] Further, in one example, Figure 2-4As shown, it also includes a calf iron frame 6, a calf connecting rod 61 and a calf push rod 62, one end of the calf connecting rod 61 is hinged to the fourth end of the lower backrest frame 3, and the other end is hinged to the first end of the calf push rod 62, the second end of the calf push rod is hinged to the seat frame 1, and the third end of the calf push rod is provided with a roller 63, the roller 63 is against the calf iron frame 6, and the calf iron frame 6 is hinged to the front end of the seat frame 1;
[0027] The driving mechanism 4 drives the lower backrest frame 3 to rotate about the second hinge point b, thereby driving the calf connecting rod 61 to push the calf push rod 62 to rotate around the hinge point with the seat frame 1, and push the calf iron frame 6 to lift up.
[0028] 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 calf push rod can also be set separately to drive the calf to be lifted and lowered separately, so that when the upper backrest and the lower backrest are lying flat, the leg and abdominal muscles can be stretched by controlling the calf iron frame to be lifted and lowered repeatedly, thereby achieving a massage effect.
[0029] Further, in one example, Figure 2 and 4 As shown, a limiting cross bar 31 is also provided on the lower backrest frame 3 , and the limiting cross bar 31 limits the flipping angle of the upper backrest frame 2 .
[0030] The flipping angle of the upper backrest frame is controlled by the driving mechanism, but for double insurance, for example, when the user is heavy or leans back hard, 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.
[0031] Further, in one example, Figure 3 As shown, the level of the first hinge point a is higher than the level of the third hinge point c, and the level of the second hinge point b is lower than the level of the fourth hinge point d.
[0032] Further, in one example, the level of the first hinge point a is lower than the level of the third hinge point c, and the level of the second hinge point b is higher than the level of the fourth hinge point d.
[0033] It should be noted that the hinge positions of the connecting rod 5 with the seat frame 1 and the upper backrest frame 2, as well as the hinge positions of the lower backrest frame 3 with the seat frame 1 and the upper backrest frame 2 are interchangeable, have the same functions, and are designed with the same basic concept, and will not be described in detail in the embodiments of the present invention.
[0034] In addition, it should be noted that the farther the distance between the first hinge point a and the third hinge point c, and the farther the distance between the second hinge point b and the fourth hinge point d, the greater the angle at which the upper backrest frame 2 can be tilted. Of course, the distance cannot be too far to prevent the upper backrest frame 2 from tilting over during the transition. Figure 6 As shown in the figure, when the distance is far, the comparison diagram of the flip angle can be shown as follows: Figure 7 and Figure 5 The user can select a suitable chair frame according to the needs.
[0035] Further, in one example, Figure 1 As shown, it also includes an upper backrest pad 71, a lower backrest pad 72, a seat pad 73 and a calf pad 74, wherein the upper backrest pad 71 is fixed to the upper backrest frame 2, the lower backrest pad 72 is fixed to the lower backrest frame 3, the seat pad 73 is fixed to the top of the seat frame 1, and the calf pad 74 is fixed to the calf iron frame 6. Each backrest pad can be filled with a relatively soft and elastic filler, so that the user will be more comfortable when using it.
[0036] Furthermore, in one example, massage airbags may be provided in the upper backrest pad 71, the lower backrest pad 72, the seat pad 73 and the calf pad 74. An air pump and an air valve are also provided 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.
[0037] Furthermore, in one example, massage discs may be provided in the upper backrest pad 71, the lower backrest pad 72, the seat pad 73 and the calf pad 74. A control device is also provided on the corresponding chair frame to control the rotation of the massage disc, and convex points are also provided on the massage disc to provide rotational friction massage to the user.
[0038] Furthermore, in one example, the driving mechanism 4 is any one of a push rod, an airbag assembly, an air cylinder, and an oil cylinder.
[0039] The connection structure and working principle of a variable angle chair frame provided by an embodiment of the present invention are described in detail below with reference to the accompanying drawings.
[0040] The connection relationship between each component is as follows Figure 1-7As shown, the four components of the upper backrest frame 2, the lower backrest frame 3, the seat frame 1, and the connecting rod 5 are hinged at four hinge points to form a four-bar linkage. Specifically, the bottom of the upper backrest frame 2 and the first end of the lower backrest frame 3 are hinged at the first hinge point a, and the second end of the lower backrest frame 3 and the top of the seat frame 1 are hinged at the second hinge point b; one end of the connecting rod 5 is hinged at the third hinge point c at the bottom of the upper backrest frame 2, and the other end of the connecting rod 5 and the top of the seat frame 1 are hinged at the fourth hinge point d; the second end of the lower backrest frame 3 is arranged close to the seat plate; one end of the driving mechanism 4 (implemented by a push rod in the figure) is hinged at the bottom of the seat frame 1, and the other end is hinged at the third end of the lower backrest frame 3; the calf top rod 62 is hinged on the seat frame, and the calf connecting rod 61 is hinged on the lower backrest frame 3 to form another four-bar linkage.
[0041] When working, the push rod 4 contracts and drives the lower backrest frame 3 to rotate downward around the second hinge point b, and the traction connecting rod 5 rotates around the fourth hinge point d, and the two together pull the upper backrest frame 2 to rotate and move downward, so that the chair frame changes from a sitting state to a lying state. At the same time, the calf connecting rod 61 pushes the calf push rod 62 to make the calf iron frame 6 rise.
[0042] On the contrary, the push rod 4 extends to drive the lower backrest frame 3 to rotate upward around the second hinge point b, and the push rod 5 rotates around the fourth hinge point d, and the two together pull the upper backrest frame 2 to rotate and move upward, so that the chair frame changes from a lying state to a sitting state. At the same time, the calf connecting rod 61 pulls the calf push rod 62 to make the calf iron frame 6 descend.
[0043] That is to say, the chair frame provided by the present invention, by providing a separate lower backrest frame and connecting rod, the back part is segmented into the back and waist, and a three-section chair frame is realized in conjunction with the seat part, and the lower backrest frame and the upper backrest frame are adjustable through the driving mechanism and the connecting rod, so that the movement forms of the backrest are more diverse, and the user can adjust the support angle of the waist and back according to their own needs, and the chair frame structure is more intelligent and more comfortable. In addition, by providing a calf connecting rod and a calf top rod, the linkage of the chair frame backrest and calf lifting can be realized, and the user can lie flat through a driving mechanism, so that the cost of the chair frame is lower, and the lying position after the angle adjustment is more comfortable.
[0044] Furthermore, this embodiment also provides a sofa, including the above-mentioned variable angle chair frame, and armrests are arranged on both sides of the chair frame. In this way, the backrest is divided into two sections, the upper section is responsible for the back, and the lower section is responsible for the waist. The movement forms of the backrest are more diverse, and it is more comfortable as a sofa chair frame. Of course, it can also be applied to other chair frames, such as massage chairs, etc., and the embodiment of the present invention does not limit this.
[0045] 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.
[0046] 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 seat frame, an upper backrest frame, a lower backrest frame, a driving mechanism and a connecting rod; the seat frame is provided with a seat plate; The bottom of the upper backrest frame and the first end of the lower backrest frame are hinged at a first hinge point, and the second end of the lower backrest frame and the top of the seat frame are hinged at a second hinge point; one end of the connecting rod is hinged at a third hinge point at the bottom of the upper backrest frame, and the other end of the connecting rod is hinged at a fourth hinge point at the top of the seat frame; the second end of the lower backrest frame is arranged close to the seat plate; One end of the driving mechanism is hinged to the bottom of the seat frame, and the other end is hinged to the third end of the lower backrest frame; wherein the first hinge point and the third hinge point are not overlapped, and the second hinge point and the fourth hinge point are not overlapped; The driving mechanism drives the lower backrest frame to rotate downward around the second hinge point, and pulls the connecting rod to rotate around the fourth hinge point. The two together pull the upper backrest frame to rotate and move downward, so that the chair frame changes 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 iron frame, a calf connecting rod and a calf top rod, one end of the calf connecting rod is hinged to the fourth end of the lower backrest frame, and the other end is hinged to the first end of the calf top rod, the second end of the calf top rod is hinged to the seat frame, and the third end of the calf top rod is provided with a roller, the roller abuts against the calf iron frame, and the calf iron frame is hinged to the front end of the seat frame; The driving mechanism drives the lower backrest frame to rotate about the second hinge point, thereby driving the calf connecting rod to push the calf push rod to rotate around the hinge point with the seat frame, and push the calf iron frame to lift up.
3. The variable angle chair frame according to claim 1, characterized in that: The lower backrest frame is also provided with a limit cross bar, and the limit cross bar limits the turning angle of the upper backrest frame.
4. The variable angle chair frame according to claim 1, characterized in that: The level of the first hinge point is higher than that of the third hinge point, and the level of the second hinge point is lower than that of the fourth hinge point.
5. The variable angle chair frame according to claim 1, characterized in that: The level of the first hinge point is lower than that of the third hinge point, and the level of the second hinge point is higher than that of the fourth hinge point.
6. The variable angle chair frame according to claim 1, characterized in that: It also includes an upper backrest pad, a lower backrest pad, a seat pad and a calf pad. The upper backrest pad is fixed on the upper backrest frame, the lower backrest pad is fixed on the lower backrest frame, the seat pad is fixed on the top of the seat frame, and the calf pad is fixed on the calf iron frame.
7. The variable angle chair frame according to claim 6, characterized in that: Massage airbags are arranged in the upper backrest pad, the lower backrest pad, the seat pad and the calf pad.
8. The variable angle chair frame according to claim 6, characterized in that: Massage discs are arranged in the upper backrest pad, the lower backrest pad, the seat pad and the calf pad.
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.