An iron frame for a double-motor-driven assisted standing and reclining chair and its working method

Abstract

The present invention relates to a working method of an iron frame for a double-motor-driven assisted lying chair. The iron frame includes a slider-type electric push rod, a motor bracket, a telescopic bracket, an H-shaped bracket, a base, an inclined bracket, a connecting rod, and an inclined connecting rod. By setting the inclined bracket, after the telescopic bracket is unfolded, the front end of the base can be lifted by the cooperation of the inclined connecting rod and the electric push rod. When the user lies flat, the function of having the head lower than the feet can be realized, enriching the functions of the iron frame. The setting of the slider-type electric push rod enables the electric push rod to drive the rotating rod to rotate when the motor bracket is locked, realizing the continuous operation of unfolding the telescopic bracket and lifting the front end of the base.

Description

Technical Field

[0001] The present invention relates to the technical field of sofa accessory equipment, in particular to an iron frame for a double-motor-driven assisted-standing reclining chair and its working method. Background Art

[0002] Reclining chairs have become essential furniture in many families. With the continuous improvement of people's living standards, electric reclining sofas have gradually entered ordinary households. An electric reclining sofa is a sofa that can automatically recline and is powered. Generally, its surface is covered with high-grade genuine leather, filled with high-quality sponge in the middle, and the main structure is supported by a retractable reclining chair iron frame, which has fashionability and aesthetics, and is widely used in places such as families and companies. The emergence of electric sofa reclining chairs can be said to have opened a new chapter in the leisure industry and the furniture industry. Electric sofa reclining chairs have the practicality of furniture, the leisure nature of the leisure industry, and a high-tech automated design that can perfectly combine these three aspects.

[0003] Existing reclining chair iron frames generally have postures such as lying flat, raising legs, and sitting upright. There are many reclining chair iron frames with the above functions. For example, Chinese Patent Grant Publication Nos. CN202892335U, CN203538831U, CN203314481U, etc. The reclining chair iron frames recorded in the above patent documents do not have the function of assisting in standing. For some elderly people and disabled people, there are many inconveniences when using them. To improve the above defects, Chinese Patent Grant Publication No. CN203986974U discloses a double-motor-driven reclining chair mechanism, including: a base, on which a first drive head, a second drive head, a tail adjustment bracket assembly, and a middle adjustment bracket assembly are provided. The first drive head drives the tail adjustment bracket to be in a vertical state, a lying flat state, or an inclined state. An anterior adjustment link part is cooperatively connected to the middle adjustment bracket assembly. The second drive head drives the middle adjustment bracket assembly to lift or lower to be in an upright state or a lying flat state, and drives the anterior adjustment link part to be in an open state or a contracted state. The anterior adjustment link part is locked by the tail adjustment bracket assembly when in the contracted state and released by the tail adjustment bracket assembly when in the open state. This double-motor-driven reclining chair mechanism can realize various functions such as the extension and contraction of the reclining chair footrest, the lifting and lowering of the reclining chair frame, and the inclination and erection of the backrest. For some special users, it is necessary to achieve a lying flat state with the head lower than the feet on the reclining chair to accelerate the blood flow from the feet to the head or achieve other corresponding purposes. The existing reclining chair structure cannot achieve the above functions. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an iron frame for a double-motor-driven assisted-standing reclining chair with a simple structure and capable of realizing the function of having the head lower than the feet and its working method.

[0005] To solve the above technical problems, the iron frame for a double-motor-driven assisted lying chair provided by the present invention includes a telescopic power mechanism, a telescopic bracket, and a base, and further includes a motor bracket, an inclined bracket, an upper frame assembly, and an inclined connecting rod. The middle parts on both sides of the inclined bracket are hinged to the middle parts on both sides of the base, and the tail end of the inclined bracket is upturned; a rotatable rotating rod is provided at the front end of the upper frame assembly, and rotating rod brackets are respectively provided at both ends of the rotating rod. One end of the inclined connecting rod is hinged to the rotating rod bracket, and the other end of the inclined connecting rod is hinged to the tail end of the inclined bracket, so that when the rotating rod rotates, it can drive the inclined bracket to move; the motor bracket is placed above the upper frame assembly, the tail end of the telescopic power mechanism is matched with the rotating rod, and the front end of the telescopic power mechanism is in transmission cooperation with the motor bracket. Both ends of the motor bracket are respectively in transmission cooperation with the telescopic bracket, so that when the telescopic power mechanism expands and contracts, it can drive the motor bracket and the upper frame assembly to move, and the motor bracket drives the telescopic bracket to expand and contract.

[0006] Further, the telescopic bracket includes a seat plate assembly, a leg plate telescopic assembly, a foot plate telescopic assembly, and a backrest telescopic assembly. Telescopic backrest telescopic assemblies are respectively provided on both sides of the tail end of the seat plate assembly, telescopic leg plate telescopic assemblies are respectively provided on both sides of the front end of the seat plate assembly, and a telescopic foot plate telescopic assembly is provided at the front end of the leg plate telescopic assembly; the tail ends on both sides of the motor bracket are in transmission cooperation with the backrest telescopic assembly, and the front ends on both sides of the motor bracket are in transmission cooperation with the leg plate telescopic assembly, so that when the motor bracket moves, it can drive the backrest telescopic assembly and the leg plate telescopic assembly to expand and contract.

[0007] Further, the upper frame assembly includes an H-shaped bracket and a connecting rod. On both sides of the front end of the seat board assembly, seat board brackets are provided downward. The bottom ends of the seat board brackets are hinged and matched with the front part of the H-shaped bracket. At the tail ends on both sides of the base, base brackets are provided upward. The tail ends on both sides of the H-shaped bracket are hinged and matched with the bottoms of the base brackets. The front end of the connecting rod is hinged and matched with the middle part of the seat board bracket. The tail end of the connecting rod is hinged and matched with the top of the base bracket. The telescopic power mechanism is a slider type electric push rod. The slider type electric push rod includes an electric push rod and a slider in transmission cooperation. The tail end of the electric push rod is hinged and matched with the middle part of the rotating rod. The front end of the electric push rod faces the backrest telescopic assembly. The slider is fixedly arranged on the motor bracket. During assembly, the slider is placed in the middle of the electric push rod. At this time, the front end of the inclined bracket does not exceed the base. When in use, when the electric push rod is started and the slider moves towards the front end of the electric push rod, it drives the motor bracket to move towards the backrest telescopic assembly. The leg plate telescopic assembly and the foot plate telescopic assembly are driven by the motor bracket to unfold. When the motor bracket moves to a preset position, the leg plate telescopic assembly and the foot plate telescopic assembly are fully unfolded and the motor bracket stops moving. Continuing to start the electric push rod causes the electric push rod to move relative to the slider, that is, the electric push rod moves towards the leg plate telescopic assembly direction, driving the rotating rod to rotate forward. The rotating rod drives the inclined connecting rod to move forward, and the inclined connecting rod drives the inclined bracket to rotate. The inclined bracket supports the ground, making the front end of the base higher than the back end of the base, that is, the leg plate telescopic assembly and the foot plate telescopic assembly are higher than the backrest telescopic assembly.

[0008] Further, the seat board assembly further includes a seat board cross brace and seat board longitudinal braces arranged on both sides. The seat board brackets are fixedly arranged on the lower sides of the front parts of the seat board longitudinal braces. Rotating connecting rods are hinged at the front ends of the seat board longitudinal braces. The rotating connecting rod includes a first connection end, a second connection end, and a third connection end. The middle part of the second connection end is hinged and matched with the seat board longitudinal brace. The third connection end is in transmission cooperation with the front end of the motor bracket. A limit protrusion is arranged between the second connection end and the third connection end. Limit rivets are fixedly arranged on the seat board longitudinal braces, so that the motor bracket can drive the rotating connecting rod to rotate, and the rotation angle of the rotating connecting rod is limited by the cooperation of the limit protrusion and the limit rivets.

[0009] Further, the motor bracket includes a motor bracket cross brace and motor bracket side braces fixedly arranged on both sides of the motor bracket cross brace. A seat board front brace is fixedly arranged at the front end of the motor bracket side brace. The seat board front brace is hinged and matched with the third connection end of the rotating connecting rod. The slider is fixedly arranged in the middle of the motor bracket cross brace, so that the electric push rod can drive the motor bracket to move.

[0010] Further, a motor connecting frame is fixedly arranged in the middle of the rotating rod, and the tail end of the electric push rod is hinged with the motor connecting frame, so that the electric push rod can drive the rotating rod to rotate, which is convenient for operation.

[0011] Further, the base includes a front base support, a rear base support and base side supports arranged on both sides. Hinge brackets are arranged on the inner sides of the base side supports. The inclined bracket includes a cross brace of the inclined bracket and inclined bracket side supports arranged on both sides of the cross brace of the inclined bracket. Rotatable rollers are arranged at the front ends of the inclined bracket side supports. The middle parts of the inclined bracket side supports are hinged with the hinge brackets. A limit stop block is fixedly arranged at the front end of the hinge bracket, so that after the inclined bracket rotates to a preset position, the limit stop block can contact the inclined bracket side support to limit the inclined bracket.

[0012] Further, the leg plate telescopic assembly includes a leg plate transmission connecting rod, a front leg plate support, a first leg plate connecting rod and a second leg plate connecting rod arranged in parallel, a third leg plate connecting rod and a fourth leg plate connecting rod arranged in parallel. The tail end of the first leg plate connecting rod is hinged with the second connection end of the rotating connecting rod. The tail end of the second leg plate connecting rod is hinged with the upper part of the front end of the seat plate longitudinal support. The tail end of the third leg plate connecting rod is hinged with the front end of the first leg plate connecting rod. The front end of the third leg plate connecting rod is hinged with the front leg plate support. The tail end of the fourth leg plate connecting rod is hinged with the front end of the second leg plate connecting rod. The front end of the fourth leg plate connecting rod is hinged with the front leg plate support. A leg plate rotation pin is arranged in the middle of the second leg plate connecting rod. The middle part of the third leg plate connecting rod is hinged with the leg plate rotation pin. The tail end of the leg plate transmission connecting rod is hinged with the first connection end of the rotating connecting rod. The front end of the leg plate transmission connecting rod is hinged with the leg plate rotation pin, so that the rotating connecting rod can drive the leg plate transmission connecting rod and the leg plate rotation pin to move, realizing the deformation and telescoping of the first leg plate connecting rod and the second leg plate connecting rod, and the third leg plate connecting rod and the fourth leg plate connecting rod.

[0013] Further, the foot plate telescopic assembly includes a first foot plate connecting rod, a second foot plate connecting rod, a third foot plate connecting rod, a fourth foot plate connecting rod and a foot plate support. The tail end of the first foot plate connecting rod is hinged with the middle part of the third leg plate connecting rod. The front end of the first foot plate connecting rod is hinged with the tail end of the third foot plate connecting rod. The front end of the third foot plate connecting rod is hinged with the foot plate support. The tail end of the second foot plate connecting rod is fixedly connected with the front leg plate support. The front end of the second foot plate connecting rod is hinged with the tail end of the fourth foot plate connecting rod. The front end of the fourth foot plate connecting rod is hinged with the foot plate support. A foot plate rotation pin is arranged in the middle of the second foot plate connecting rod. The middle part of the third foot plate connecting rod is hinged with the foot plate rotation pin, so that the third leg plate connecting rod can drive the first foot plate connecting rod, the third foot plate connecting rod and the foot plate support to move.

[0014] Furthermore, the backrest telescopic assembly includes a first backrest link, a second backrest link, a third backrest link, and a fourth backrest link. The bottom end of the first backrest link is hinged to the longitudinal brace of the seat board, the top end of the first backrest link is hinged to the front end of the second backrest link, the upper part of the tail end of the second backrest link is hinged to the top end of the third backrest link, the second backrest link is fixedly connected to the tail end of the side brace of the motor bracket, and the bottom end of the third backrest link is fixedly connected to the fourth backrest link, so that when the motor bracket moves, it can drive the first backrest link, the second backrest link, the third backrest link, and the fourth backrest link to move.

[0015] Furthermore, universal wheels are provided on both sides of the tail end of the base, and pads are provided on both sides of the front end of the base.

[0016] The working method of the above iron frame for a double-motor-driven assisted lying chair includes the following steps:

[0017] A. Upright sitting position: The slider is placed in the middle of the electric push rod, the front end of the inclined bracket is flush with the bottom end of the base, the base and the seat board assembly are in a horizontal state, and the leg board telescopic assembly and the foot board telescopic assembly are in a retracted state, enabling an upright sitting position.

[0018] B. Lying flat position: Start the electric push rod to make the slider move towards the front end of the electric push rod. The slider drives the motor bracket to move towards the backrest telescopic assembly direction. The motor bracket drives the rotating link to rotate towards the backrest telescopic assembly direction. The rotating link drives the leg board transmission link to move forward. The leg board transmission link drives the first leg board link, the second leg board link, the third leg board link, and the fourth leg board link to expand. The third leg board link drives the first foot board link, the second foot board link, the third foot board link, the fourth foot board link, and the foot board support to expand. When the rotating link rotates to the position where the limit protrusion is clamped with the limit rivet, the rotating link is limited by the limit rivet, the motor bracket stops, and the leg board telescopic assembly and the foot board telescopic assembly are in an expanded state, enabling a lying flat position.

[0019] C. Relaxed lying position: Continue to start the electric push rod. Since the rotating link cannot rotate and the motor bracket is locked, the slider drives the electric push rod to move towards the leg board telescopic assembly direction. The electric push rod drives the rotating rod to rotate towards the leg board telescopic assembly direction. The rotating rod drives the inclined link to move forward towards the leg board telescopic assembly direction. The inclined link drives the inclined bracket to rotate. The roller at the front end of the inclined bracket descends, and the support formed by the roller and the ground makes the front end of the base higher than the back end of the base, that is, the leg board telescopic assembly and the foot board telescopic assembly are higher than the backrest telescopic assembly, realizing a relaxed lying position with the head lower and the feet higher.

[0020] D. Restore the upright sitting position: Activate the electric push rod to reset the slider to the middle of the electric push rod. The electric push rod drives the rotating rod to rotate towards the backrest telescopic assembly. The rotating rod drives the inclined connecting rod to move towards the backrest telescopic assembly. The inclined connecting rod drives the inclined bracket to rotate to reset the inclined bracket. The roller at the front end of the inclined bracket lifts, and the front end of the base descends. Support is formed by the base and the ground. After the inclined bracket rotates until the side support of the inclined bracket contacts the limit stop, the limit stop limits the inclined bracket. The inclined bracket stops moving, the rotating rod stops rotating, and the electric push rod stops moving. The slider moves along the electric push rod towards the leg plate telescopic assembly. The slider drives the motor bracket to move towards the leg plate telescopic assembly. The motor bracket drives the rotating connecting rod to rotate towards the leg plate telescopic assembly. The rotating connecting rod drives the leg plate transmission connecting rod to move backward. The leg plate transmission connecting rod drives the leg plate first connecting rod, leg plate second connecting rod, leg plate third connecting rod, and leg plate fourth connecting rod to contract. The leg plate third connecting rod drives the foot plate first connecting rod, foot plate second connecting rod, foot plate third connecting rod, foot plate fourth connecting rod, and foot plate support to contract, restoring the upright sitting position.

[0021] E. Standing assist position: Activate the electric push rod to move the electric push rod towards the slider. The electric push rod drives the rotating rod to rotate towards the slider. The rotating rod drives the front ends of the H-shaped bracket and the connecting rod to tilt upward. The rotating rod drives the front end of the inclined connecting rod to tilt upward through the rotating rod bracket, causing the seat plate assembly to rise and forming the standing assist position.

[0022] Technical effects of the invention: (1) The iron frame of the double-motor-driven standing assist recliner of the present invention, compared with the prior art, by setting the inclined bracket, after the telescopic bracket is unfolded, the cooperation of the inclined connecting rod and the electric push rod can achieve the lifting of the front end of the base. After the user lies flat, the function of head lower and feet higher can be realized, enriching the functions of the iron frame; (2) The setting of the slider-type electric push rod enables the electric push rod to drive the rotating rod to rotate when the motor bracket is locked, realizing the continuous operation of unfolding the telescopic bracket and lifting the front end of the base, with a simple structure and easy operation; (3) The setting of the roller enables the front end of the inclined bracket to be in sliding cooperation with the ground to reduce the frictional resistance; (4) The rotating connecting rod with three connection ends enables only one electric push rod to realize three operation modes: lying flat sitting position, leisure reclining position, and standing assist position, with a simple structure and rich functions. Description of the Drawings

[0023] The present invention will be further described in detail below with reference to the drawings of the specification:

[0024] Figure 1 is a three-dimensional structural schematic diagram of the iron frame of the double-motor-driven standing assist recliner of the present invention;

[0025] Figure 2 is an exploded structural schematic diagram of the iron frame of the double-motor-driven standing assist recliner of the present invention;

[0026] Figure 3 It is a three-dimensional structural schematic diagram of a telescopic support;

[0027] Figure 4 It is an assembly structural schematic diagram of an H-shaped support, a base, an inclined support, a motor support, a transmission mechanism, an inclined connecting rod, and a connecting rod;

[0028] Figure 5 It is an assembly structural schematic diagram of an H-shaped support, a motor, and an inclined connecting rod;

[0029] Figure 6 It is an assembly structural schematic diagram of a base, an inclined support, and a connecting rod;

[0030] Figure 7 It is a structural schematic diagram of the iron frame of the double-motor-driven assisted standing reclining chair of the present invention in a leisure reclining position;

[0031] Figure 8 It is a structural schematic diagram of the iron frame of the double-motor-driven assisted standing reclining chair of the present invention in a sitting position;

[0032] Figure 9 It is a structural schematic diagram of the iron frame of the double-motor-driven assisted standing reclining chair of the present invention in an assisted standing position;

[0033] Figure 10 It is a three-dimensional structural schematic diagram of the iron frame of the double-motor-driven assisted standing reclining chair of the present invention;

[0034] Figure 11 It is Figure 10 a partial enlarged view of area A in

[0035] Figure 12 a structural schematic diagram of a rotating connecting rod.

[0036] In the figure:

[0037] motor support 1, motor support side brace 11, motor support cross brace 12, motor hinge support 13,

[0038] telescopic support 2, seat front brace 2-1,

[0039] rotating connecting rod 2-2, first connection end 2-2-1, second connection end 2-2-2, third connection end 2-2-3, rotating pin mounting hole 2-2-4, arc portion 2-2-5, limit protrusion 2-2-6,

[0040] leg plate transmission connecting rod 2-3, leg plate first connecting rod 2-4, leg plate second connecting rod 2-5, leg plate third connecting rod 2-6, leg plate fourth connecting rod 2-7, leg plate front brace 2-8,

[0041] foot plate first connecting rod 2-9, foot plate second connecting rod 2-10, foot plate third connecting rod 2-11, foot plate fourth connecting rod 2-12, foot plate support 2-13,

[0042] The first backrest link 2-14, the second backrest link 2-15, the third backrest link 2-16, the fourth backrest link 2-17, the backrest cross brace 2-18

[0043] The limit rivet 2-19, the seat plate longitudinal brace 2-20, the seat plate cross brace 2-21, the seat plate bracket 2-22

[0044] The leg plate rotating pin 2-23, the foot plate rotating pin 2-24, the rotating pin 2-25, the limit post 2-26, the backrest cross brace bracket 2-27

[0045] The connecting rod 3, the H-shaped bracket 4, the H-shaped bracket side brace 41, the H-shaped bracket cross brace 42

[0046] The base 5, the base side brace 51, the base front brace 52, the base rear brace 53, the universal caster 54, the cushion block 55, the base bracket 56, the hinge bracket 57, the limit stop 58

[0047] The rotating rod 6, the motor connecting frame 61, the rotating rod bracket 62

[0048] The tilting link 7, the tilting bracket 8, the tilting bracket side brace 81, the tilting bracket cross brace 82, the roller 83, the slider type electric push rod 9, the electric push rod 91, the slider 92 Detailed implementation manners

[0049] Embodiment 1 As Figures 1 to 2 shown, the iron frame of the double-motor-driven assisted standing and lying chair in this embodiment uses a slider type electric push rod 9 as the telescopic power mechanism. The slider type electric push rod 9 includes an electric push rod 91 and a slider 92 that are in transmission cooperation, and also includes a motor bracket 1 for installing the slider 92, an extendable telescopic bracket 2, an upper frame assembly, a rotatable tilting bracket 8 and a pair of tilting links 7, and a base 5 that contacts the ground during use. The upper frame assembly includes an H-shaped bracket 4 and a pair of connecting rods 3

[0050] As Figure 6 shown, the base 5 includes a base front brace 52, a base rear brace 53 and 2 base side braces 51 placed on both sides. The two ends of the base front brace 52 are respectively welded and fixed to the front ends of the two base side braces 51, and the two ends of the base rear brace 53 are welded and fixed to the rear parts of the two base side braces 51 to form a rectangular base frame. Cushion blocks 55 are provided at the bottoms of the two ends of the base front brace 52, and universal casters 54 are respectively provided at the tails of the two base longitudinal braces 51, so that the base 5 can contact the ground by the universal casters 54 and the cushion blocks 55; hinge brackets 57 are provided on the inner sides of the middle parts of the two base side braces 51, and base brackets 56 extending upward are respectively provided at the two ends of the base rear brace 53

[0051] As Figure 6As shown in the figure, the inclined bracket 8 includes an inclined bracket cross brace 82 and two inclined bracket side braces 81 disposed on both sides of the inclined bracket cross brace 82. The two ends of the inclined bracket cross brace 82 are respectively welded and fixed to the front ends of the two inclined bracket side braces 81 to form a U-shaped inclined bracket 8. The tail ends of the two inclined bracket side braces 81 are upturned, and rotatable rollers 83 are provided at the front ends of the two inclined bracket side braces 81. The outer sides of the middle parts of the respective inclined bracket side braces 81 are respectively hinged and matched with the hinge brackets 57, and a limit stop 58 is fixedly provided at the front end of the hinge bracket 57. After the inclined bracket 8 rotates to a preset position, the limit stop 58 can contact the inclined bracket side brace 81 to limit the rotation angle of the inclined bracket 8.

[0052] As Figure 5 shown in the figure, the H-shaped bracket 4 includes an H-shaped bracket cross brace 42 and two H-shaped bracket side braces 41. The middle parts of the two H-shaped bracket side braces 41 are respectively welded and fixed to the two ends of the H-shaped bracket cross brace 42. A rotatable rotating rod 6 is provided at the front end of the H-shaped bracket 4. Rotating rod brackets 62 are respectively provided at the two ends of the rotating rod 6. One end of the inclined connecting rod 7 is hinged and matched with the rotating rod bracket 62, and the other end of the inclined connecting rod 7 is hinged and matched with the upturned tail end of the inclined bracket side brace 81, so that when the rotating rod 6 rotates, it can drive the inclined bracket 8 to rotate; a motor connecting frame 61 is fixedly provided in the middle of the rotating rod 6. The tail end of the electric push rod 91 is hinged and matched with the motor connecting frame 61, and the front end of the electric push rod 9 faces the backrest telescopic assembly, so that the electric push rod 91 can drive the rotating rod 6 to rotate.

[0053] As Figure 2 shown in the figure, the motor bracket 1 includes a motor bracket cross brace 12 and two motor bracket side braces 11 fixedly provided on both sides of the motor bracket cross brace 12. The two ends of the motor bracket cross brace 12 are respectively welded and fixed to the inner sides of the middle parts of the two motor bracket side braces 11. The slider 92 of the slider type electric push rod 9 is fixedly provided in the middle of the motor bracket cross brace 12, and the slider 92 is in transmission cooperation with the electric push rod 91, so that the electric push rod 91 can drive the motor bracket 1 to move.

[0054] As Figure 3 shown in the figure, the telescopic bracket 2 includes a seat plate assembly, a leg plate telescopic assembly, a foot plate telescopic assembly, and a backrest telescopic assembly. Telescopic backrest telescopic assemblies are respectively provided on both sides of the tail end of the seat plate assembly, telescopic leg plate telescopic assemblies are respectively provided on both sides of the front end of the seat plate assembly, and a telescopic foot plate telescopic assembly is provided at the front end of the leg plate telescopic assembly; the tail ends on both sides of the motor bracket 1 are in transmission cooperation with the backrest telescopic assembly, and the front ends on both sides of the motor bracket 1 are in transmission cooperation with the leg plate telescopic assembly, so that when the motor bracket 1 moves, it can drive the backrest telescopic assembly and the leg plate telescopic assembly to expand and contract.

[0055] Specifically, as Figure 3, the seat board assembly includes a seat board cross brace 2-21 and seat board longitudinal braces 2-20 disposed on both sides. The two ends of the seat board cross brace 2-21 are fixedly welded to the front parts of the two seat board longitudinal braces 2-20. Seat board brackets 2-22 are respectively and downwardly fixedly provided at the front ends of the two seat board longitudinal braces 2-20. The front parts of the two H-shaped bracket side braces 41 of the H-shaped bracket 4 are respectively hinged and matched with the bottom ends of the seat board brackets 2-22. The tops of the respective base brackets 56 are respectively hinged and matched with the tops of the corresponding seat board brackets 2-22 through connecting rods 3, that is, the front ends of the connecting rods 3 are hinged and matched with the tops of the seat board brackets 2-22, and the rear ends of the connecting rods 3 are hinged and matched with the tops of the base brackets 56, so that the seat board brackets 2-22, the H-shaped bracket side braces 41, the base brackets 56, and the connecting rods 3 form a quadrilateral mechanism.

[0056] A seat board front brace 2-1 is fixedly provided at the front end of each motor bracket side brace 11. As Figures 10 to 12 shown, a rotatable rotating link 2-2 is hingedly provided at the front end of each seat board longitudinal brace 2-20. The rotating link 2-2 includes a first connection end 2-2-1, a second connection end 2-2-2, and a third connection end 2-2-3. The seat board front brace 2-1 is hingedly matched with the third connection end 2-2-3 of the rotating link 2-2. A rotating pin 2-25 is fixedly provided on the seat board longitudinal brace 2-20. A rotating pin mounting hole 2-2-4 adapted to the rotating pin 2-25 is provided in the middle of the second connection end 2-2-2, so that the rotating link 2-2 can be rotatably provided on the seat board longitudinal brace 2-20. The third connection end 2-2-3 is hingedly matched with the seat board front brace 2-1, so that the front end of the motor bracket side brace 11 is in transmission cooperation with the rotating link 2-2. A limit protrusion 2-2-6 is provided between the second connection end 2-2-2 and the third connection end 2-2-3. A limit rivet 2-19 is fixedly provided on the seat board longitudinal brace 2-20, so that the motor bracket 1 can drive the rotating link 2-2 to rotate, and the rotation angle of the rotating link 2-2 is limited by the cooperation of the limit protrusion 2-2-6 and the limit rivet 2-19.

[0057] As Figure 2As shown in the figure, each leg plate telescopic assembly includes a leg plate transmission connecting rod 2-3, a leg plate front support 2-8, a leg plate first connecting rod 2-4 and a leg plate second connecting rod 2-5 arranged in parallel, and a leg plate third connecting rod 2-6 and a leg plate fourth connecting rod 2-7 arranged in parallel. The tail end of the leg plate second connecting rod 2-5 is hinged with the upper part of the front end of the seat plate longitudinal support 2-20. The tail end of the leg plate first connecting rod 2-4 is hinged with the second connection end 2-2-2 of the rotating connecting rod 2-2. The tail end of the leg plate third connecting rod 2-6 is hinged with the front end of the leg plate first connecting rod 2-4. The front end of the leg plate third connecting rod 2-6 is hinged with the leg plate front support 2-8. The tail end of the leg plate fourth connecting rod 2-7 is hinged with the front end of the leg plate second connecting rod 2-5. The front end of the leg plate fourth connecting rod 2-7 is hinged with the leg plate front support 2-8. A leg plate rotating pin 2-23 is arranged in the middle of the leg plate second connecting rod 2-5. The middle of the leg plate third connecting rod 2-6 is hinged with the leg plate rotating pin 2-23. The tail end of the leg plate transmission connecting rod 2-3 is hinged with the first connection end 2-2-1 of the rotating connecting rod 2-2. The front end of the leg plate transmission connecting rod 2-3 is hinged with the leg plate rotating pin 2-23, so that the rotating connecting rod 2-2 can drive the leg plate transmission connecting rod 2-3 and the leg plate rotating pin 2-23 to move, realizing the deformation and telescoping of the leg plate first connecting rod 2-4 and the leg plate second connecting rod 2-5, and the leg plate third connecting rod 2-6 and the leg plate fourth connecting rod 2-7.

[0058] Each foot plate telescopic assembly includes a foot plate first connecting rod 2-9, a foot plate second connecting rod 2-10, a foot plate third connecting rod 2-11, a foot plate fourth connecting rod 2-12, and a foot plate support 2-13. The tail end of the foot plate first connecting rod 2-9 is hinged with the middle of the leg plate third connecting rod 2-6. The front end of the foot plate first connecting rod 2-9 is hinged with the tail end of the foot plate third connecting rod 2-11. The front end of the foot plate third connecting rod 2-11 is hinged with the foot plate support 2-13. The tail end of the foot plate second connecting rod 2-10 is fixedly connected to the leg plate front support 2-8. The front end of the foot plate second connecting rod 2-10 is hinged with the tail end of the foot plate fourth connecting rod 2-12. The front end of the foot plate fourth connecting rod 2-12 is hinged with the foot plate support 2-13. A foot plate rotating pin 2-24 is arranged in the middle of the foot plate second connecting rod 2-10. The middle of the foot plate third connecting rod 2-11 is hinged with the foot plate rotating pin 2-24, so that the leg plate third connecting rod 2-6 can drive the foot plate first connecting rod 2-9, the foot plate third connecting rod 2-11, and the foot plate support 2-13 to move.

[0059] The backrest telescopic assembly includes a first backrest link 2-14, a second backrest link 2-15, a third backrest link 2-16, and a fourth backrest link 2-17. The bottom end of the first backrest link 2-14 is hinged to the bottom of the tail end of the seat plate longitudinal brace 2-20. The top end of the first backrest link 2-14 is hinged to the front end of the second backrest link 2-15. The upper part of the tail end of the second backrest link 2-15 is hinged to the top end of the third backrest link 2-16, and the second backrest link 2-15 is fixedly connected to the tail end of the motor bracket side brace 11. The bottom end of the third backrest link 2-16 is fixedly connected to the fourth backrest link 2-17, so that when the motor bracket 1 moves, it can drive the first backrest link 2-14, the second backrest link 2-15, the third backrest link 2-16, and the fourth backrest link 2-17 to move.

[0060] As shown in Figure 4 the figure, during assembly, the slider 92 is placed in the middle of the electric push rod 91. At this time, the front end of the inclined bracket 8 does not exceed the base 5. When in use, when the electric push rod 91 is started and the slider 92 moves towards the front end of the electric push rod 91, it drives the motor bracket 1 towards the backrest telescopic assembly. The motor bracket 1 drives the leg plate telescopic assembly and the foot plate telescopic assembly to unfold. When the motor bracket 1 moves to the preset position, the leg plate telescopic assembly and the foot plate telescopic assembly are fully unfolded, and the motor bracket 1 stops moving. Continuing to start the electric push rod 91 causes the electric push rod 91 to move relative to the slider 92, that is, the electric push rod 91 moves towards the leg plate telescopic assembly direction, driving the rotating rod 6 to rotate forward. The rotating rod 6 drives the inclined link 7 to move forward, and the inclined link 7 drives the inclined bracket 8 to rotate. The inclined bracket 8 supports the ground, making the front end of the base 6 higher than the rear end of the base 5, that is, the leg plate telescopic assembly and the foot plate telescopic assembly are higher than the backrest telescopic assembly, realizing the function of head lower and feet higher.

[0061] Preferably, an arc portion 2-2-5 is provided between the rotating link limit protrusion 2-2-6 and the second connection end 2-2-2. A limit post 2-26 is provided on the seat plate cross brace 2-21. When the rotating link 2-2 rotates, a rotational friction is formed between the arc portion 2-2-5 and the limit post 2-26 to control the rotation angle of the rotating link 2-2 and limit the rotation of the rotating link 2-2.

[0062] To ensure the extension effect of the backrest telescopic assembly, a motor hinge bracket 13 is further provided on the motor bracket cross brace 12. A backrest cross brace 2-18 is fixedly arranged between the two fourth backrest links 2-17. A backrest cross brace bracket 2-27 is arranged in the middle of the backrest cross brace 2-18. A telescopic second power mechanism (not shown in the figure) is arranged between the motor hinge bracket 13 and the backrest cross brace bracket 2-27, which is used to separately drive the telescoping of the backrest telescopic assembly to ensure the telescoping efficiency of the backrest assembly and achieve dual-motor drive. Embodiment

[0063] The working method of the iron frame for the double-motor-driven assisted lying chair described above includes the following steps:

[0064] A. Upright sitting position: The slider 92 is placed in the middle of the electric push rod 91. The front end of the inclined bracket 8 is flush with the bottom end of the base 5. The base 5 and the seat plate assembly are in a horizontal state, and the leg plate telescopic assembly and the foot plate telescopic assembly are in a retracted state, enabling an upright sitting position, as Figure 8 shown.

[0065] B. Lying flat position: Start the electric push rod 91 to make the slider 92 move towards the front end of the electric push rod 91. The slider 92 drives the motor bracket 1 to move towards the backrest telescopic assembly. The motor bracket 1 drives the rotating link 2-2 to rotate towards the backrest telescopic assembly. The rotating link 2-2 drives the leg plate transmission link 2-3 to move forward. The leg plate transmission link 2 drives the leg plate first link 2-4, the leg plate second link 2-5, the leg plate third link 2-6, and the leg plate fourth link 2-7 to unfold. The leg plate third link 2-6 drives the foot plate first link 2-9, the foot plate second link 2-10, the foot plate third link 2-11, the foot plate fourth link 2-12, and the foot plate support 2-13 to unfold. When the rotating link 2-2 rotates until the limit projection 2-2-6 is engaged with the limit rivet 2-19, the rotating link 2-2 is limited by the limit rivet 2-19, and the motor bracket 1 stops. The leg plate telescopic assembly and the foot plate telescopic assembly are in an unfolded state, enabling a lying flat position, as Figure 1 shown.

[0066] C. Relaxed lying position: Continue to start the electric push rod 91. Since the rotating link 2-2 cannot rotate and the motor bracket 1 is locked, the slider 92 drives the electric push rod 91 to move towards the leg plate telescopic assembly. The electric push rod 91 drives the rotating rod 6 to rotate towards the leg plate telescopic assembly. The rotating rod 6 drives the inclined link 7 to move forward towards the leg plate telescopic assembly. The inclined link 7 drives the inclined bracket 8 to rotate. The roller 83 at the front end of the inclined bracket 8 descends. The support formed by the roller 83 and the ground makes the front end of the base 5 higher than the rear end of the base 5, that is, the leg plate telescopic assembly and the foot plate telescopic assembly are higher than the backrest telescopic assembly, achieving a relaxed lying position with the head lower and the feet higher, as Figure 7 shown.

[0067] D. Restore the upright sitting position: Activate the electric push rod 91 to reset the slider 92 to the middle of the electric push rod 91. The electric push rod 91 drives the rotating rod 6 to rotate towards the backrest telescopic assembly. The rotating rod 6 drives the inclined connecting rod 7 to move towards the backrest telescopic assembly. The inclined connecting rod 7 drives the inclined bracket 8 to rotate to reset the inclined bracket. The roller at the front end of the inclined bracket 8 lifts, and the front end of the base 5 descends. The base 5 forms a support with the ground. After the inclined bracket 8 rotates until the side support 81 of the inclined bracket contacts the limit stop 58, the limit stop 58 limits the inclined bracket 8. The inclined bracket 8 stops moving, the rotating rod 6 stops rotating, and the electric push rod 91 stops moving. The slider 92 moves along the electric push rod 91 towards the leg plate telescopic assembly. The slider 92 drives the motor bracket 1 to move towards the leg plate telescopic assembly. The motor bracket 1 drives the rotating connecting rod 2-2 to rotate towards the leg plate telescopic assembly. The rotating connecting rod 2-2 drives the leg plate transmission connecting rod 2-3 to move backward. The leg plate transmission connecting rod 2-3 drives the leg plate first connecting rod 2-4, leg plate second connecting rod 2-5, leg plate third connecting rod 2-6, and leg plate fourth connecting rod 2-7 to contract. The leg plate third connecting rod 2-6 drives the foot plate first connecting rod 2-9, foot plate second connecting rod 2-10, foot plate third connecting rod 2-11, foot plate fourth connecting rod 2-12, and foot plate support 2-13 to contract, restoring the upright sitting position.

[0068] E. Standing assist position: Activate the electric push rod 91 to move the electric push rod 91 towards the slider 92. The electric push rod 92 drives the rotating rod 6 to rotate towards the slider 92. The rotating rod 6 drives the front ends of the H-shaped bracket 4 and the connecting rod 3 to lift. The rotating rod 6 drives the front end of the inclined connecting rod 7 to lift through the rotating rod bracket 62, causing the seat plate assembly to rise and form a standing assist position, as Figure 9 shown.

[0069] Obviously, the above embodiments are merely examples for clearly explaining the present invention and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And these obvious changes or variations derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A working method of an iron frame for a double-motor-driven assisted lying chair, the iron frame comprising a telescopic power mechanism, a telescopic bracket, and a base, characterized in that, it further comprises a motor bracket, an inclined bracket, an upper frame assembly, and an inclined connecting rod. The middle parts on both sides of the inclined bracket are hinged and cooperated with the middle parts on both sides of the base, and the tail end of the inclined bracket is upturned; a rotatable rotating rod is arranged at the front end of the upper frame assembly, and rotating rod brackets are respectively arranged at both ends of the rotating rod. One end of the inclined connecting rod is hinged and cooperated with the rotating rod bracket, and the other end of the inclined connecting rod is hinged and cooperated with the tail end of the inclined bracket, so that when the rotating rod rotates, it can drive the inclined bracket to move; the motor bracket is placed above the upper frame assembly, the tail end of the telescopic power mechanism is cooperated with the rotating rod, the front end of the telescopic power mechanism is in transmission cooperation with the motor bracket, and both ends of the motor bracket are in transmission cooperation with the telescopic bracket respectively, so that when the telescopic power mechanism expands and contracts, it can drive the motor bracket and the upper frame assembly to move, and the motor bracket drives the telescopic bracket to expand and contract; the telescopic bracket comprises a seat plate assembly, a leg plate telescopic assembly, a foot plate telescopic assembly, and a backrest telescopic assembly. Telescopic backrest telescopic assemblies are respectively arranged on both sides of the tail end of the seat plate assembly, telescopic leg plate telescopic assemblies are respectively arranged on both sides of the front end of the seat plate assembly, and a telescopic foot plate telescopic assembly is arranged at the front end of the leg plate telescopic assembly; the tail ends on both sides of the motor bracket are in transmission cooperation with the backrest telescopic assembly, and the front ends on both sides of the motor bracket are in transmission cooperation with the leg plate telescopic assembly, so that when the motor bracket moves, it can drive the backrest telescopic assembly and the leg plate telescopic assembly to expand and contract; the upper frame assembly comprises an H-shaped bracket and a connecting rod. Seat brackets are arranged downward on both sides of the front end of the seat plate assembly, the bottom ends of the seat brackets are hinged and cooperated with the front part of the H-shaped bracket, base brackets are arranged upward on both sides of the tail end of the base, the tail ends on both sides of the H-shaped bracket are hinged and cooperated with the bottoms of the base brackets, the front end of the connecting rod is hinged and cooperated with the middle part of the seat bracket, and the tail end of the connecting rod is hinged and cooperated with the top of the base bracket; the telescopic power mechanism is a slider-type electric push rod, and the slider-type electric push rod comprises an electric push rod and a slider in transmission cooperation. The tail end of the electric push rod is hinged and cooperated with the middle part of the rotating rod, the front end of the electric push rod faces the backrest telescopic assembly, and the slider is fixedly arranged on the motor bracket; during assembly, the slider is placed in the middle of the electric push rod; The seat board assembly further includes a seat board cross brace and seat board longitudinal braces disposed on both sides. The seat board bracket is fixedly arranged on the lower side of the front part of the seat board longitudinal brace. The front ends of the seat board longitudinal braces are hingedly provided with rotating linkages. The rotating linkage includes a first connection end, a second connection end, and a third connection end. The middle part of the second connection end is hingedly matched with the seat board longitudinal brace. The third connection end is in transmission cooperation with the front end of the motor bracket. A limiting protrusion is arranged between the second connection end and the third connection end. A limiting rivet is fixedly arranged on the seat board longitudinal brace, so that the motor bracket can drive the rotating linkage to rotate, and the rotation angle of the rotating linkage is limited by the cooperation of the limiting protrusion and the limiting rivet; The motor bracket includes a motor bracket cross brace and motor bracket side braces fixedly arranged on both sides of the motor bracket cross brace. The front end of the motor bracket side brace is fixedly provided with a seat board front brace. The seat board front brace is hingedly matched with the third connection end of the rotating linkage. The slider is fixedly arranged in the middle of the motor bracket cross brace; The leg board telescopic assembly includes a leg board transmission linkage, a leg board front brace, parallel leg board first link and leg board second link, parallel leg board third link and leg board fourth link. The tail end of the leg board first link is hingedly matched with the second connection end of the rotating linkage. The tail end of the leg board second link is hingedly matched with the upper part of the front end of the seat board longitudinal brace. The tail end of the leg board third link is hingedly matched with the front end of the leg board first link. The front end of the leg board third link is hingedly matched with the leg board front brace. The tail end of the leg board fourth link is hingedly matched with the front end of the leg board second link. The front end of the leg board fourth link is hingedly matched with the leg board front brace. A leg board rotating pin is arranged in the middle of the leg board second link. The middle part of the leg board third link is hingedly matched with the leg board rotating pin. The tail end of the leg board transmission linkage is hingedly matched with the first connection end of the rotating linkage. The front end of the leg board transmission linkage is hingedly matched with the leg board rotating pin, so that the rotating linkage can drive the leg board transmission linkage and the leg board rotating pin to move; The foot board telescopic assembly includes a foot board first link, a foot board second link, a foot board third link, a foot board fourth link, and a foot board support. The tail end of the foot board first link is hingedly matched with the middle part of the leg board third link. The front end of the foot board first link is hingedly matched with the tail end of the foot board third link. The front end of the foot board third link is hingedly matched with the foot board support. The tail end of the foot board second link is fixedly connected to the leg board front brace. The front end of the foot board second link is hingedly matched with the tail end of the foot board fourth link. The front end of the foot board fourth link is hingedly matched with the foot board support. A foot board rotating pin is arranged in the middle of the foot board second link. The middle part of the foot board third link is hingedly matched with the foot board rotating pin, so that the leg board third link can drive the foot board first link, the foot board third link, and the foot board support to move; The backrest telescopic assembly includes a first backrest link, a second backrest link, a third backrest link, and a fourth backrest link. The bottom end of the first backrest link is hinged to the longitudinal brace of the seat board, the top end of the first backrest link is hinged to the front end of the second backrest link, the upper part of the tail end of the second backrest link is hinged to the top end of the third backrest link, the second backrest link is fixedly connected to the tail end of the side brace of the motor bracket, and the bottom end of the third backrest link is fixedly connected to the fourth backrest link, so that when the motor bracket moves, it can drive the first backrest link, the second backrest link, the third backrest link, and the fourth backrest link to move; The working method includes the following steps: A. Upright sitting position: The slider is placed in the middle of the electric push rod, the front end of the inclined bracket is flush with the bottom end of the base, the base and the seat board assembly are in a horizontal state, the leg board telescopic assembly and the foot board telescopic assembly are in a contracted state, and upright sitting can be achieved; B. Lying flat position: Start the electric push rod to make the slider move towards the front end of the electric push rod. The slider drives the motor bracket to move towards the backrest telescopic assembly. The motor bracket drives the rotating link to rotate towards the backrest telescopic assembly. The rotating link drives the leg board transmission link to move forward. The leg board transmission link drives the first leg board link, the second leg board link, the third leg board link, and the fourth leg board link to expand. The third leg board link drives the first foot board link, the second foot board link, the third foot board link, the fourth foot board link, and the foot board support to expand. When the rotating link rotates to the limit protrusion is clamped with the limit rivet, the rotating link is limited by the limit rivet, the motor bracket is stationary, and the leg board telescopic assembly and the foot board telescopic assembly are in an expanded state, and lying flat can be achieved; C. Relaxed lying position: Continue to start the electric push rod. Since the rotating link cannot rotate and the motor bracket is locked, the slider drives the electric push rod to move towards the leg board telescopic assembly. The electric push rod drives the rotating rod to rotate towards the leg board telescopic assembly. The rotating rod drives the inclined link to move forward towards the leg board telescopic assembly. The inclined link drives the inclined bracket to rotate. The roller at the front end of the inclined bracket descends. The support formed by the roller and the ground makes the front end of the base higher than the rear end of the base, that is, the leg board telescopic assembly and the foot board telescopic assembly are higher than the backrest telescopic assembly, and a relaxed lying position with the head lower and the feet higher is achieved; D. Restore the upright sitting position: Activate the electric push rod to reset the slider to the middle of the electric push rod. The electric push rod drives the rotating rod to rotate towards the backrest telescopic assembly. The rotating rod drives the inclined connecting rod to move towards the backrest telescopic assembly. The inclined connecting rod drives the inclined bracket to rotate to reset the inclined bracket. The roller at the front end of the inclined bracket lifts, and the front end of the base descends, forming a support with the ground. After the inclined bracket rotates until the side support of the inclined bracket contacts the limit stop, the limit stop limits the inclined bracket. The inclined bracket stops moving, the rotating rod stops rotating, and the electric push rod stops moving. The slider moves along the electric push rod towards the leg plate telescopic assembly. The slider drives the motor bracket to move towards the leg plate telescopic assembly. The motor bracket drives the rotating connecting rod to rotate towards the leg plate telescopic assembly. The rotating connecting rod drives the leg plate transmission connecting rod to move backward. The leg plate transmission connecting rod drives the leg plate first connecting rod, leg plate second connecting rod, leg plate third connecting rod, and leg plate fourth connecting rod to contract. The leg plate third connecting rod drives the foot plate first connecting rod, foot plate second connecting rod, foot plate third connecting rod, foot plate fourth connecting rod, and foot plate support to contract, restoring the upright sitting position; E. Standing assistance position: Activate the electric push rod to move the electric push rod towards the slider. The electric push rod drives the rotating rod to rotate towards the slider. The rotating rod drives the front ends of the H-shaped bracket and the connecting rod to tilt upward. The rotating rod drives the front end of the inclined connecting rod to tilt upward through the rotating rod bracket, causing the seat plate assembly to rise and forming the standing assistance position.

2. The working method according to claim 1, characterized in that, the base includes a front base support, a rear base support, and base side supports on both sides. An articulated bracket is provided inside the base side support. The inclined bracket includes an inclined bracket cross brace and inclined bracket side supports on both sides of the inclined bracket cross brace. A rotatable roller is provided at the front end of the inclined bracket side support. The middle of the inclined bracket side support is hinged with the articulated bracket, and a limit stop is fixedly provided at the front end of the articulated bracket.

3. The working method according to claim 2, characterized in that, a motor connection frame is fixedly provided in the middle of the rotating rod, and the tail end of the electric push rod is hinged with the motor connection frame.

4. The working method according to any one of claims 1-3, characterized in that, universal wheels are provided on both sides of the tail end of the base, and pads are provided on both sides of the front end of the base.

Images