WO2024031863A1

WO2024031863A1 - Adjusting device for seat unit and seat unit

Info

Publication number: WO2024031863A1
Application number: PCT/CN2022/132594
Authority: WO
Inventors: 蔡赛军; 李晓鸿; 张小强
Original assignee: 锐迈科技股份有限公司
Priority date: 2022-08-09
Filing date: 2022-11-17
Publication date: 2024-02-15
Also published as: CN115177110A

Abstract

An adjusting device for a seat unit, used for adjusting the seat unit among a sitting posture, a stretching posture, and a lying posture, and comprising a backrest connecting assembly (10), an intermediate transmission assembly (20), and a foot rest connecting assembly (30) which are connected in sequence. The backrest connecting assembly (10) at least comprises a backrest connecting block (11); the intermediate transmission assembly (20) at least comprises a seat frame (21) and an adjusting mechanism for adjusting the seat frame (21), the adjusting mechanism at least comprises a first connecting member (23), and a first hinge hole (231), a second hinge hole (232), and a third hinge hole (233) are sequentially formed in the first connecting member (23); and the maximum angle variation when the backrest connecting block (11) is adjusted between the stretching posture and the lying posture is not less than 25°, and the maximum angle variation when the seat frame (21) is adjusted between the stretching posture and the lying posture is not less than 5°. The adjusting device can perform large-angle adjustment on the seat unit, and a user can reach a zero-gravity state when in use.

Description

An adjusting device for a seat unit and a seat unit

Technical field

The present invention relates to the field of seat units, and in particular to an adjusting device for a seat unit and a seat unit.

Background technique

The functional seat can be adjusted into sitting, stretching and lying positions. The sitting position is the standard retracted position, which is the most original state of the seat, allowing people to sit down and use it normally in daily life. At this time, the seat is in a generally horizontal orientation and the backrest is set to be basically upright; the extended position is usually called For the TV position, the footrest extends forward of the seat while the backrest remains sufficiently upright to allow the occupant of the seating unit to comfortably watch television. and a reclined position (or lying position) in which the backrest is positioned rearwardly from an extended position into an obtuse relationship with the seat for resting or sleeping. However, the adjustment angle of the existing functional seats is small. When the functional seats are in a stretched or lying position, it is difficult to achieve a zero-gravity state (the horizontal line of the user's calf is higher than the position of the heart), and the comfort level is low.

Contents of the invention

In view of the shortcomings of the existing technology, the first object of the present invention is to provide an adjusting device for a seat unit, which allows the user to adjust the height and angle of the backrest, the seat and the footrest through the seat unit in a coordinated manner. It can achieve a zero-gravity state and improve the comfort of the seating unit.

Another object of the present invention is to provide a seating unit that is highly comfortable and can place the user in a zero-gravity state when lying down.

The embodiments of the present invention are implemented through the following technical solutions:

An adjusting device for a seat unit, used to switch the seat unit between a sitting position, a stretched position and a lying position, which is characterized in that it includes a backrest connection assembly, an intermediate transmission assembly and a foot connection assembly that are connected in sequence; The backrest connection assembly at least includes a backrest connection block; the intermediate transmission assembly at least includes a seat frame and an adjustment mechanism for adjusting the seat frame; the adjustment mechanism includes a first connecting piece, and the first connecting piece is sequentially configured with Hinge hole one, hinge hole two and hinge hole three, the distance between hinge hole one and hinge hole three is A1, the distance between hinge hole two and hinge hole three is A2, the ratio between A2 and A1 is not greater than 0.5 ; The adjustment mechanism also includes a fixed base plate and a rotary drive plate that are oppositely arranged, and two seventh connectors disposed between the seat frame and the rotary drive plate; the rotary drive plate is sequentially configured with nine hinge holes , hinge hole ten and hinge hole eleven, wherein: the hinge hole eleven is distributed close to the foot connection component, the hinge hole nine is distributed close to the backrest connection component, and the two seventh connectors are hinged to the corresponding parts one by one. The hinge hole ten and the hinge hole eleven; the hinge hole one and the hinge hole nine are coaxial; the distance between the hinge hole nine and the hinge hole ten is C1, and the distance between the hinge hole nine and the hinge hole eleven is C2, and the ratio between C1 and C2 is not greater than 0.35; when the backrest connecting block is adjusted between the extended position and the lying position, the change in the angle between the side edge of the backrest connecting block and the horizontal plane is not less than 25 °.

According to a preferred embodiment, the adjustment mechanism further includes a second connecting piece hinged with the first connecting piece, and the second connecting piece is provided with hinge holes four, five and six in sequence, wherein: The hinge hole five and the hinge hole three are coaxial; the distance between the hinge hole four and the hinge hole six is B1, the distance between the hinge hole five and the hinge hole six is B2, and the ratio between B2 and B1 is not greater than 0.5.

According to a preferred embodiment, the adjustment mechanism further includes a third connecting piece hinged with the second connecting piece, and the third connecting piece is provided with hinge holes seven and eight, wherein: hinge hole seven and the Hinge hole six is coaxial; the distance between hinge hole seven and hinge hole eight is not greater than 230mm.

According to a preferred embodiment, the first connection member, the second connection member and the third connection member are provided between the fixed base plate and the rotation drive plate, as well as a fourth connection member and a fifth connection member. The connecting piece and the sixth connecting piece; the first connecting piece is hinged to the rotating drive plate through the hinge hole 1; the second connecting piece is hinged to the fixed base plate through the hinge hole 4; One end of the six connectors is hinged to the hinge hole two, and the other end is hinged to one end of the fourth connector; the other end of the fourth connector is hinged to the fixed base plate; one end of the fifth connector is hinged to Between the two ends of the fourth connecting piece, the other end is hinged to the rotation drive plate; the third connecting piece is hinged to between the two ends of the sixth connecting piece through the hinge hole eight.

According to a preferred embodiment, the foot connection assembly includes a foot connection block; a rear mounting hole is provided on the fixed base plate, and the horizontal plane where the center of the rear mounting hole is defined is the reference plane; the backrest connecting block is located When the backrest connection block is in a lying position, the height between the lowest point of the foot connection block and the reference plane is H1, and H1 is not greater than 100mm; when the backrest connection block is in the lying position, the distance between the highest point of the foot connection block and the reference plane is The height of the surface is H2, and the H2 is not greater than 600mm.

According to a preferred embodiment, the rising distance of the foot connecting block during the process of adjusting from the extended position to the lying position is no more than 300 mm.

According to a preferred embodiment, when in the sitting position, the distance between the highest point of the backrest connecting block and the reference plane is no more than 400mm, and when in the lying position, the distance between the highest point of the backrest connecting block and the reference plane is no more than 400mm. The distance between the reference planes shall not be greater than 320mm.

According to a preferred embodiment, the backrest connection assembly further includes a backrest limiting block, a backrest limiting rod and a ninth connecting piece. The backrest connecting block is hingedly connected to the backrest limiting block, and the ninth connecting piece One end is hinged to between the two end points of the backrest connecting block, and the other end is hinged to the backrest limit rod. The backrest limit rod is provided with a limit protrusion, and the backrest limit block is provided with a limiter. With the limiting surface matching the position convexity, during the process of adjusting the stretched position to the lying position, the center point of the ninth connecting member moves downward by a distance of 30 mm to 100 mm.

According to a preferred embodiment, an elastic buffer device is provided between the backrest limiter block and the backrest limiter rod.

According to a preferred embodiment, the elastic buffer device is a sponge pad and/or a spring.

According to a preferred embodiment, when the seat frame is adjusted between the stretched position and the lying position, the change in the angle between the side edge of the seat frame and the horizontal plane is not less than 5°.

According to a preferred embodiment, the adjustment of the seat unit from the sitting position to the extended position is a first adjustment stage, and the adjustment of the seat unit from the extended position to a lying position is a second adjustment stage. The first adjustment stage is The adjustment stage and the second adjustment stage are driven by the same drive source.

According to a preferred embodiment, the driving source is connected to the backrest connection assembly or the intermediate transmission assembly, and the output end of the driving source is connected to the foot connection assembly.

According to a preferred embodiment, the driving source is a linear motor, the linear motor has an output shaft, and the output shaft is connected to the foot connection assembly.

According to a preferred embodiment, the driving source is a cylinder, the cylinder has a piston rod, and the piston rod is connected to the foot connection assembly.

According to a preferred embodiment, the first connecting piece includes an extension part a, an extension part b and a first transition section c connected in sequence, and the extension part a and the extension part b are parallel, wherein: the hinge hole 2 and the first transition section c The third hinge hole is provided in the extension part a, and the hinge hole one is provided in the extension part b.

According to a preferred embodiment, the second connecting piece includes an extension part d, an extension part e and a second transition section f which are connected in sequence. The extension part d and the extension part e are parallel, wherein: the hinge hole 5 and the second transition section f The hinge hole six is provided in the extension part d, and the hinge hole four is provided in the extension part e.

A seat unit, including a backrest, a seat, a footrest and the above-mentioned adjusting device for the seat unit, wherein: the backrest connecting block is used to connect the backrest; the seat frame is used to connect the seat; in the lying position When the height difference between the highest point of the footrest and the highest point of the backrest is not greater than 400mm.

The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

The structure of the present invention is reasonably designed. By cooperatively adjusting the corresponding heights and angles of the backrest, seat and footrest, the user can achieve a zero-gravity state through the seat unit, thereby improving the comfort of the seat unit; at the same time, it is as comfortable as possible. On the basis of using a small number of structural parts, the adjusting mechanism can achieve stable support and large-angle adjustment of the seat frame, which not only reduces the cost but also reduces the complexity of the adjusting mechanism, facilitates later maintenance, and can reduce the volume of the adjusting mechanism and its space occupation. Compare.

Description of drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of the seat unit of the present invention in a sitting position;

Figure 2 is a schematic structural diagram of the seat unit in an extended position according to the present invention;

Figure 3 is a schematic structural diagram of the seat unit of the present invention in a lying position;

Figure 4 is a schematic structural diagram of the seat unit adjustment mechanism of the present invention in a sitting position;

Figure 5 is a schematic structural diagram of the seat unit adjustment mechanism of the present invention in an extended position;

Figure 6 is a schematic structural diagram of the seat unit adjustment mechanism of the present invention in a lying position;

Figure 7 is a structural schematic diagram of the corresponding back side of the seat unit adjustment mechanism in Figure 6;

Figure 8 is a schematic front structural view of the rotation drive plate in the present invention;

Figure 9 is a schematic front structural view of the first connector in the present invention;

Figure 10 is a schematic front structural view of the second connector in the present invention;

Figure 11 is a schematic front structural view of the third connector in the present invention;

Figure 12 is a schematic structural diagram of the fixed base plate installed on the frame in the present invention.

Icon: 1-backrest, 10-backrest connection component, 11-backrest connection block, 12-backrest limiter, 121-limiter surface, 13-backrest limiter rod, 131-limiter convex, 14-eighth connection Parts, 15-ninth connecting piece, 2-seat, 20-intermediate transmission component, 201-fixed base plate, 2011-limiting column, 2012-rear mounting hole, 202-rotating drive plate, 2021-hinge hole nine, 2022 - Hinge hole ten, 2023 - Hinge hole eleven, 21 - Seat frame, 22 - Seventh connecting piece, 23 - First connecting piece, 231 - Hinge hole one, 232 - Hinge hole two, 233 - Hinge hole three, 234 - extension part a, 235 - first transition section c, 236 - extension part b, 24 - second connecting piece, 241 - hinge hole four, 242 - hinge hole five, 243 - hinge hole six, 244 - extension part d, 245-second transition section f, 246-extension e, 25-third connecting piece, 251-hinged hole seven, 252-hinged hole eight, 26-fourth connecting piece, 27-fifth connecting piece, 28-th Six connectors, 3-foot part, 30-foot connection component, 31-foot connection block, 4-frame.

Detailed ways

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", The orientations or positional relationships indicated by "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply the device or device referred to. Elements must have a specific orientation, be constructed and operate in a specific orientation and therefore are not to be construed as limitations of the invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the invention belongs. The terminology used herein in the description of the invention is for the purpose of describing specific embodiments only and is not intended to limit the invention.

Example 1

Please refer to Figures 1 to 3, a seating unit includes a backrest 1, a seat 2 and a footrest 3; Figures 1 to 3 correspond to the sitting, stretching and lying positions respectively, respectively, which can be adjusted by the adjusting device. The first adjustment stage is when the seat unit is adjusted from the sitting position in Figure 1 to the extended position in Figure 2. In the first adjustment stage, the angle of the backrest 1 remains basically unchanged, the footrest 3 is stretched upward from the lowest point, and the seat unit is adjusted from the lowest point in Figure 2. The second adjustment stage is when the stretched position of 2 is adjusted to the lying position in Figure 3. During the second adjustment stage, the angle of the backrest 1 becomes larger, and the footrest 3 continues to rise until the adjustment is completed to the final lying position. In this embodiment, as shown in Figure 3, the highest point of the backrest 1 and the highest point of the footrest 3 are of the same height. In other embodiments, the highest point of the backrest 1 and the highest point of the footrest 3 are different in height. Not larger than 400mm, preferably 100mm, 200mm, or 300mm.

As shown in Figure 12, the frame 4 is fixedly installed on the ground, and the fixed base plate 201 is installed on the frame 4 and is stationary relative to the ground. The fixed base plate 201 is provided with a rear mounting hole 2012, and the horizontal plane defining the center of the rear mounting hole 2012 is the reference plane.

In this embodiment, the posture of the above-mentioned seat unit is adjusted through the seat unit adjustment device. Please refer to Figures 4-6, which respectively correspond to the three states of the seat unit in Figures 1-3. Referring to Figures 1-6, specifically, an adjusting device for a seat unit is used to adjust the seat unit between a sitting position, a stretched position and a lying position, including a backrest connection assembly 10, an intermediate transmission assembly 20 and a backrest connection assembly 10 connected in sequence. The foot connection assembly 30; the backrest connection assembly 10 at least includes a backrest connection block 11, which is used to connect and adjust the backrest part 1; the intermediate transmission assembly 20 at least includes a seat frame 21 and an adjustment mechanism for adjusting the seat frame 21. The frame 21 is used to connect and adjust the seat part 2; the foot connection assembly 30 includes a foot connection block 31 used to connect and adjust the foot part 3; wherein:

The adjustment mechanism includes a first connecting piece 23, a second connecting piece 24, a third connecting piece 25, a fourth connecting piece 26, a fifth connecting piece 27, a sixth connecting piece 28, a seventh connecting piece 22, a fixed base plate 201 and a rotating The driving plate 202, the fixed base plate 201 and the rotating driving plate 202 are arranged oppositely, and the first connecting piece 23, the second connecting piece 24, the third connecting piece 25, the fourth connecting piece 26, the fifth connecting piece 27 and the sixth connecting piece 28 Disposed between the fixed base plate 201 and the rotating driving plate 202, the first ends of at least two seventh connecting parts 22 are hinged to the rotating driving plate 202, and the second ends of the two seventh connecting parts 22 are hinged to the base. Box 21.

Specifically, as shown in Figures 4, 5, 6 and 7, the first connecting member 23 is provided with hinge hole one 231, hinge hole two 232 and hinge hole three 233 in sequence. The hinge hole one 231 and the hinge hole three The distance between hinge holes 233 is A1, the distance between hinge hole two 232 and hinge hole three 233 is A2, and the ratio between A2 and A1 is not greater than 0.5. In this embodiment, the ratio between A2 and A1 is 0.291, more specifically, A2=25mm and A1=86mm. In other embodiments, the ratio between A2 and A1 may be 0.3, 0.4, or 0.45. In this embodiment, the first connecting member 23 is hinged to the rotating drive plate 202 through the first hinge hole 231, the second hinge hole 232 is hinged to the sixth connecting member 28, the third hinge hole 233 is hinged to the second connecting member 24, and the first connecting member The angle between 23 and the reference plane changes from 65.4° to 136.6°, and the rising height of hinge hole 231 is 38mm, which drives the seat frame 21 to rotate forward and upward, and then drives the leg connection assembly 30 forward and upward, so that the legs Higher than the head to achieve a zero-gravity effect.

In this embodiment, the first connecting member 23 includes an extension part a234, an extension part b236 and a first transition section c235 connected in sequence. The extension part a234 and the extension part b236 are parallel, wherein: the second hinge hole 232 and the third hinge hole 233 are provided in The extension part a234 and the hinge hole 231 are provided on the extension part b236. The second connecting piece 24 is hinged to the first connecting piece 23. The second connecting piece 24 is provided with hinge hole four 241, hinge hole five 242 and hinge hole six 243 in sequence, wherein: hinge hole five 242 and hinge hole three 233 are coaxial. ; The distance between hinge hole four 241 and hinge hole six 243 is B1, the distance between hinge hole five 242 and hinge hole six 243 is B2, and the ratio between B2 and B1 is not greater than 0.5. In this embodiment, the ratio between B2 and B1 is 0.316, more specifically, B2=30mm and B1=95mm. In other embodiments, the ratio between B2 and B1 may be 0.35, 0.40, 0.45.

In this embodiment, the second connecting member 24 includes an extension part d244, an extension part e246 and a second transition section f245 that are connected in sequence. The extension part d244 and the extension part e246 are parallel, wherein: the hinge hole five 242 and the hinge hole six 243 are provided in The extension part d244 and the hinge hole 241 are provided on the extension part e246.

The fourth hinge hole 241 is hinged to the fixed base plate 201, the fifth hinge hole 242 is hinged to the first connector 23, the sixth hinge hole 243 is hinged to the third connector 25, and the included angle between the second connector 24 and the reference plane is 43.4°. -102.1°, the rising height of hinge hole six 243 is 27.5mm, thereby driving the backrest connection assembly 10 to rotate downward and backward, and the backrest angle reaches a zero-gravity effect.

The third connecting piece 25 is hinged with the second connecting piece 24. The third connecting piece 25 is provided with hinge hole seven 251 and hinge hole eight 252, wherein: hinge hole seven 251 and hinge hole six 243 are coaxial; hinge holes seven 251 and The distance between the eight hinge holes 252 is no more than 230mm. In this embodiment, the distance between hinge hole seven 251 and hinge hole eight 252 is 183.44 mm. In other embodiments, the distance between hinge hole seven 251 and hinge hole eight 252 may be 180mm, 190mm, or 200mm.

The number of the seventh connector 22 is two. The rotation drive plate 202 is provided with nine hinge holes 2021, ten hinge holes 2022 and hinge holes eleven 2023 in sequence, wherein: the hinge holes eleven 2023 are distributed close to the foot connection assembly 30, Hinge hole nine 2021 is distributed close to the backrest connection component 10, and the two seventh connectors 22 are hinged to hinge hole ten 2022 and hinge hole eleven 2023 in one-to-one correspondence; hinge hole one 231 is coaxial with hinge hole nine 2021; hinge hole nine 2021 The distance between hinge hole ten 2022 is C1, the distance between hinge hole nine 2021 and hinge hole eleven 2023 is C2, and the ratio between C1 and C2 is not greater than 0.35. In this embodiment, the ratio between C1 and C2 is 0.154, more specifically, C1=50.37mm and C2=326.01mm. In other embodiments, the ratio between C1 and C2 may be 0.15, 0.25, or 0.3.

In this embodiment, a limiting column 2011 is provided on the fixed base plate 201. When the backrest connecting block 11 is in a sitting position, the second connecting piece 24 abuts against the limiting column 2011. The limiting column 2011 here is used to limit the position of the second connecting member 24 when sitting, so as to maintain the sitting state. By setting the hinge holes on the rotating drive plate 202 and according to the above preferred proportions, the rotation angle of the seat frame 21 can meet the corresponding requirements, that is, in the sitting position, the angle of the seat frame 21 relative to the horizontal plane is 8.9°. The distance between the highest point and the datum plane is H3, H3=204mm; when lying down, the distance between the highest point of the seat frame 21 and the datum plane is H4, H4=340mm, which can achieve a zero-gravity effect when lying down; and the seat frame 21 It can smoothly drive the backrest 1 to sink and the foot rest 3 to rise.

In this embodiment, the hinge point of the seventh connecting member 22 and the seat frame 21 is 138 mm away from the hinge point of the seventh connecting member 22 and the rotating drive plate 202. In other embodiments, this distance may be between 130-150 mm. The value can be set as needed.

The first connecting piece 23 is hinged to the rotating drive plate 202 through hinge hole one 231; the second connecting piece 24 is hinged to the fixed base plate 201 through hinge hole four 241; one end of the sixth connecting piece 28 is hinged to hinge hole two 232, and the other end is hinged. to one end of the fourth connecting member 26; the other end of the fourth connecting member 26 is hinged to the fixed base plate 201; one end of the fifth connecting member 27 is hinged to between the two ends of the fourth connecting member 26, and the other end is hinged to the rotation drive Plate 202; the third connecting member 25 is hinged to between the two ends of the sixth connecting member 28 through the hinge hole eight 252.

To sum up, when the seat unit adjusting device in this embodiment is used, the fixed base plate 201 is fixedly connected to the frame 4 of the seat unit, and the frame 4 is placed on the ground. That is, during the adjustment process of the seat unit, the fixed base plate 201 is relative to the seat unit. The ground is still. The two seventh connecting parts 22, the seat frame 21 and the rotary drive plate 202 form a planar four-bar mechanism. By driving the rotary drive plate 202, the posture of the planar four-bar mechanism is adjusted to realize the posture adjustment of the seat frame 21. Further, the first connecting piece 23 is hinged to the fixed base plate 201 through the second connecting piece 24 , and the first connecting piece 23 is hinged to the rotation driving plate 202 through the sixth connecting piece 28 , the fourth connecting piece 26 and the fifth connecting piece 27 . As shown in Figure 7, the seat unit is adjusted from the extended position to the lying position. During the process, the second connecting member 24 rotates counterclockwise around the hinge hole 241 to this state, and the first connecting member 23 and the seat frame 21 are close to the backrest. One end of the part 1 and one end of the rotating drive plate 202 close to the backrest 1 are lowered in height relative to the fixed base plate 201; at the same time, as shown in Figure 6, the second connecting member 24 adjusts the seat unit from the extended position to the lying position. The process , the second connecting member 24 rotates clockwise around the hinge hole 241 to this state. The second connecting member 24 is used as the driving member here. The second connecting member 24 drives the third connecting member 25 to move toward the foot portion 3. The connecting member 25 drives the fifth connecting member 27 to rotate counterclockwise around the hinge point of the fifth connecting member 27 and the fourth connecting member 26 through the fourth connecting member 26, so that the end of the rotating driving plate 202 close to the foot portion 3 is relatively fixed. The height of the base plate 201 rises, which generally increases the angle between the upper surface of the seat frame 21 and the ground, thereby allowing the user's calf level to be higher than the heart position to achieve a zero-gravity state.

In this embodiment, through the aforementioned setting of the hinge points on the first connecting member 23, the second connecting member 24, the third connecting member 25 and the rotating driving plate 202, the structure of the adjusting mechanism is more reasonable and the adjustment mechanism is made more reasonable. It is possible to use a small number of structural parts to achieve stable support and large-angle adjustment of the seat frame 21 by the adjusting mechanism, which not only reduces the cost but also reduces the complexity of the adjusting mechanism, facilitates later maintenance, and can reduce the volume of the adjusting mechanism and reduce its Space occupancy.

Furthermore, the maximum angular change of the backrest connecting block 11 when adjusted between the extended position and the lying position is not less than 25°, and the maximum angular change of the seat frame 21 when adjusted between the extended position and the lying position is not less than 5°. In this embodiment, the angle between the right plane of the backrest connection block 11 and the horizontal plane in Figure 4 is basically the same as the angle between it and the horizontal plane in Figure 5. In this embodiment, the right plane of the backrest connection block 11 in Figure 5 The angle with the horizontal plane is 117°. In Figure 6, the right plane of the backrest connecting block 11 has an angle with the horizontal plane of 166°, and the angle change is 49°. In other embodiments, the angle change selection range is no less than 25°, further, 25° to 90°. Preferably, the angle change range is 50°, 55°, or 60°. In the second stage, the adjustment angle change between the upper surface of the seat frame 21 and the ground is 10°, which changes from 13° to 23°. In other embodiments, the angle change can be selected to be no less than 5°, preferably 8°, 10°, or 15°. Such an angle change further provides the backrest 1 with a descending distance and at the same time raises the footrest 3, thus ultimately making the backrest 1 and the footrest 3 close to the level, allowing the user to lie as level as possible when lying down. The user's calf level can reach or even above the heart position to achieve a zero-gravity state, improving the comfort of the seating unit.

Further, the foot connection assembly 30 includes a foot connection block 31; in this embodiment, the height of the highest point of the foot connection block 31 from the reference plane when lying down is H2, H2=550mm, and the foot connection block 31 is in a sitting position. The height of the lowest point from the reference plane is H1, H1=70mm, and the ratio between the two is H2:H1≈7.86. In other embodiments, the ratio range can be other values not less than 7.8. Preferably, the ratio is 8, 8.2 ,8.4. In this embodiment, the height of the lowest point of the foot connection block 31 from the reference plane when in the sitting position is H1, and H1 is not greater than 100mm; the height of the highest point of the foot connection block 31 from the reference plane when in the lying position is H2, and H2 is not greater than 600mm. .

Such an arrangement ensures that the footrest 3 is raised to a suitable distance when in the extended position, so that the user's legs can maintain a good sitting posture while being comfortable, and when switching to a lying position, the footrest 3 will produce obvious movement. Lift, further lift the user's legs, allowing the user to enter a comfortable lying position as soon as possible. In this embodiment, the rising distance of the leg connecting block 31 during the process of adjusting from the extended position to the lying position is no more than 300 mm.

In this embodiment, when in the sitting position, the distance between the highest point of the backrest connecting block 11 and the datum plane is H5, and H5 is not greater than 400mm. When in the lying position, the distance between the highest point of the backrest connecting block 11 and the datum plane is H5. It is H6, H6 is not larger than 320mm. Such a setting makes the backrest 1 have a significant height difference when changing from a sitting position to a lying position, causing the user's upper body to sink significantly. Together with the obvious elevation of the foot rest 3, the user can enter as quickly as possible. The comfortable state of lying down.

As shown in Figures 6 and 7, the backrest connection assembly 10 also includes a backrest limiter block 12 and a backrest limiter rod 13. The backrest connection block 11 is hingedly connected to the backrest limiter 12. The backrest limiter 12 is provided with a backrest limiter. The positioning rod 13 matches the limiting surface 121 . Specifically, the backrest limiting block 12 is bifurcated and has two ends, an upper end and a lower end. One end of the backrest connecting block 11 is hinged to the upper end of the backrest limiting block 12, and the lower end of the backrest limiting block 12 is hinged to the backrest. Between the two end points of the limit rod 13,

The backrest connection assembly 10 also includes an eighth connection part 14 and a ninth connection part 15. One end of the ninth connection part 15 is hinged between the two end points of the backrest connection block 11, and the other end of the ninth connection part 15 is hinged to the backrest limit. The positioning rod 13 is close to one end of the backrest connecting block 11; the backrest limiting rod 13 is provided with a limiting protrusion 131, and the limiting surface 121 is provided close to the lower end of the backrest limiting block 12 and adapted to the limiting protrusion 131. Further, one end of the eighth connecting member 14 is hinged to the fixed base plate 201 , and the other end is hinged to an end of the backrest limiting rod 13 away from the backrest connecting block 11 . During the process of adjusting the stretching position to the lying position, the center point of the ninth connecting member 15 moves downward by a distance of 30 mm to 100 mm. In this embodiment, the downward movement distance of the center point of the ninth connecting member 15 is 70 mm. In other preferred embodiments, the downward movement distance of the center point of the ninth connecting member 15 is 30 mm, 60 mm, or 80 mm. The lowest point of the backrest 1 when the posture changes depends on the positions of the backrest limit lever 13 and the backrest limiter 12 . The backrest limit lever 13 is configured as a descendable limit lever, which lowers simultaneously with the backrest part 1 during adjustment, making the descending space of the backrest part 1 larger and making it easier for the backrest part 1 to be roughly level with the foot rest 3 .

In this embodiment, the hinge point between the backrest limiting rod 13 and the backrest limiting block 12 is 143.7 mm away from the hinge point between the backrest limiting rod 13 and the eighth connecting piece 14 . The hinge point between the eighth connector 14 and the backrest limiting rod 13 is not less than 90 mm from the hinge point between the eighth connector 14 and the fixed base plate 201. In this embodiment, it is preferably 94.14 mm. In other embodiments, it can be For 92mm, 95mm, 98mm.

In this embodiment, the first adjustment stage and the second adjustment stage are driven by the same driving source. The driving source is connected to the backrest connection component 10 , and the output end of the driving source is connected to the foot connection component 30 . The driving source is a linear motor, the linear motor has an output shaft, and the output shaft is connected to the foot connection assembly 30 . During the movement, the output shaft of the linear motor pushes the foot connection component 30. Since the foot connection component 30 is hinged with the intermediate transmission component 20, the foot connection component 30 rotates relative to the intermediate transmission component 20 and rotates to a certain fixed position. Finally, the foot connection component 30 transmits a reaction force to the linear motor. Driven by the reaction force, the foot connection component 30 and the backrest connection component 10 move synchronously, and are finally adjusted to a lying position.

Example 2

This embodiment is an improvement on Embodiment 1, and the repeated content will not be described again.

The first adjustment stage and the second adjustment stage are driven by the same driving source. The driving source is connected to the backrest connection component 10 , and the output end of the driving source is connected to the foot connection component 30 . The driving source is a cylinder, which includes a piston rod, and the piston rod is connected to the foot connection assembly 30 . During the movement, the piston rod of the cylinder pushes the foot connection assembly 30. Since the foot connection assembly 30 is hinged with the intermediate transmission assembly 20, the foot connection assembly 30 rotates relative to the intermediate transmission assembly 20. After it rotates to a certain fixed position , the foot connection assembly 30 transmits a reaction force to the cylinder. Driven by the reaction force, the foot connection assembly 30 and the backrest connection assembly 10 move synchronously, and are finally adjusted to a lying position. Compared with linear motors, cylinders can be adjusted more quickly and directly, enabling rapid changes in seat posture, while linear motors are more stable. Both have their own advantages.

Example 3

An elastic buffer device is provided between the backrest limiter block 12 and the backrest limiter rod 13 . Specifically, the elastic buffer device is a spring. In other embodiments, the elastic device may also be a sponge, or other similar materials that are elastic and capable of buffering and absorbing vibration. The provision of an elastic buffer device helps the sofa reduce the impact on the head during the descent process, and there will not be much noise when the limit block and the backrest limit rod 13 collide in the final state.

Example 4

This embodiment also has a buffer device, but it is different from Embodiment 3. This embodiment is configured on the basis of Embodiment 1. The backrest connection assembly 10 also includes a backrest limiter 12 and a backrest limiter rod 13. The backrest connection block 11 It is hinged with the backrest limiting block 12, and the backrest connecting block 11 and the backrest limiting block 12 are provided with a torque spring at the hinge. The torque spring is preferably a leaf spring. Setting a buffer device at the hinge of the two parts can also help reduce the impact of the seat on the human body during the adjustment process and the sound generated by collision during position limitation. In other possible embodiments, buffer devices may be provided between other key rotating components.

The seating unit provided in all the aforementioned embodiments is a home sofa or a leisure chair or a theater seat or a hospital seat or a vehicle seat.

The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

An adjusting device for a seat unit, used to switch the seat unit between a sitting position, a stretched position and a lying position, which is characterized in that it includes a backrest connection component (10), an intermediate transmission component (20) and a device that are connected and arranged in sequence. Foot connection assembly (30);

The backrest connection assembly (10) at least includes a backrest connection block (11);

The intermediate transmission assembly (20) at least includes a seat frame (21) and an adjustment mechanism for adjusting the seat frame (21);

The adjustment mechanism includes a first connecting piece (23). The first connecting piece (23) is sequentially provided with hinge hole one (231), hinge hole two (232) and hinge hole three (233). The distance between (231) and hinge hole three (233) is A1, the distance between hinge hole two (232) and hinge hole three (233) is A2, and the ratio between A2 and A1 is not greater than 0.5;

The adjustment mechanism also includes a fixed base plate (201) and a rotary drive plate (202) arranged oppositely, and two seventh connecting pieces (22) disposed between the seat frame (21) and the rotary drive plate (202). ); The rotation drive plate (202) is sequentially configured with hinge holes nine (2021), hinge holes ten (2022) and hinge holes eleven (2023), wherein:

The hinge hole eleven (2023) is distributed close to the foot connection component (30), the hinge hole nine (2021) is distributed close to the backrest connection component (10), and the two seventh connectors (22) correspond one to one. Hinged to the hinge hole ten (2022) and the hinge hole eleven (2023);

The hinge hole one (231) is coaxial with the hinge hole nine (2021);

The distance between hinge hole nine (2021) and hinge hole ten (2022) is C1, the distance between hinge hole nine (2021) and hinge hole eleven (2023) is C2, and the ratio between C1 and C2 is not greater than 0.35;

When the backrest connecting block (11) is adjusted between a stretched position and a lying position, the change in the angle between the side edge of the backrest connecting block (11) and the horizontal plane is not less than 25°.
An adjusting device for a seat unit according to claim 1, characterized in that the adjustment mechanism further includes a second connecting piece (24) hinged with the first connecting piece (23), and the second connecting piece (24) is hinged with the first connecting piece (23). 24) are sequentially equipped with four hinge holes (241), five hinge holes (242) and six hinge holes (243), among which:

The fifth hinge hole (242) is coaxial with the third hinge hole (233);

The distance between hinge hole four (241) and hinge hole six (243) is B1, the distance between hinge hole five (242) and hinge hole six (243) is B2, and the ratio between B2 and B1 is not greater than 0.5 .
An adjusting device for a seat unit according to claim 2, characterized in that the adjustment mechanism further includes a third connecting piece (25) hinged with the second connecting piece (24), and the third connecting piece (25) is hinged with the second connecting piece (24). 25) is equipped with hinge holes seven (251) and hinge holes eight (252), among which:

Hinge hole seven (251) and hinge hole six (243) are coaxial;

The distance between hinge hole seven (251) and hinge hole eight (252) is not greater than 230mm.
An adjusting device for a seat unit according to claim 3, characterized in that the first connecting piece (23) is provided between the fixed base plate (201) and the rotating drive plate (202). The second connecting piece (24) and the third connecting piece (25), as well as the fourth connecting piece (26), the fifth connecting piece (27) and the sixth connecting piece (28);

The first connecting piece (23) is hinged to the rotation drive plate (202) through the hinge hole one (231);

The second connecting piece (24) is hinged to the fixed base plate (201) through the hinge hole 4 (241);

One end of the sixth connecting piece (28) is hinged to the second hinge hole (232), and the other end is hinged to one end of the fourth connecting piece (26);

The other end of the fourth connecting piece (26) is hinged to the fixed base plate (201);

One end of the fifth connecting member (27) is hinged to between the two ends of the fourth connecting member (26), and the other end is hinged to the rotating drive plate (202);

The third connecting piece (25) is hinged to between the two ends of the sixth connecting piece (28) through the hinge hole eight (252).
An adjusting device for a seat unit according to any one of claims 2 to 4, characterized in that the foot connection assembly (30) includes a foot connection block (31);

The fixed base plate (201) is provided with a rear mounting hole (2012), and the horizontal plane at the center of the rear mounting hole (2012) is defined as the datum plane;

When the backrest connecting block (11) is in a sitting position, the height between the lowest point of the foot connecting block (31) and the reference plane is H1, and H1 is not greater than 100mm;

When the backrest connecting block is in a lying position, the height of the highest point of the foot connecting block (31) from the reference plane is H2, and H2 is not greater than 600mm.
An adjusting device for a seat unit according to claim 5, characterized in that the rising distance of the foot connecting block (31) during the adjustment from the extended position to the lying position is no more than 300 mm.
An adjusting device for a seat unit according to claim 5, characterized in that, in the sitting position, the distance between the highest point of the backrest connecting block (11) and the reference plane is no more than 400 mm. In the lying position, the distance between the highest point of the backrest connecting block (11) and the reference plane is no more than 320mm.
An adjusting device for a seat unit according to claim 7, characterized in that the backrest connection assembly (10) further includes a backrest limiter (12), a backrest limiter rod (13) and a ninth connecting piece ( 15), the backrest connecting block (11) is hinged to the backrest limiting block (12), and one end of the ninth connecting piece (15) is hinged to between the two end points of the backrest connecting block (11) , the other end is hinged to the backrest limit lever (13), the backrest limit lever (13) is provided with a limit protrusion (131), and the backrest limit block (12) is provided with a limit protrusion. (131) Matching limiting surface (121), during the process of adjusting the stretched position to the lying position, the center point of the ninth connecting member (15) moves downward by a distance of 30 mm to 100 mm.
An adjusting device for a seat unit according to claim 8, characterized in that an elastic buffer device is provided between the backrest limiter block (12) and the backrest limiter rod (13).
An adjusting device for a seat unit according to claim 9, characterized in that the elastic buffer device is a sponge pad and/or a spring.
An adjusting device for a seat unit according to claim 1, characterized in that when the seat frame (21) is adjusted between the stretched position and the lying position, the side edge of the seat frame (21) is in contact with the The change in the angle between horizontal planes shall not be less than 5°.
The adjusting device for a seat unit according to claim 1, wherein the adjustment of the seat unit from the sitting position to the extended position is the first adjustment stage, and the adjustment of the seat unit from the extended position to The lying position is the second adjustment stage, and the first adjustment stage and the second adjustment stage are driven by the same driving source.
An adjusting device for a seat unit according to claim 12, characterized in that the driving source is connected to the backrest connection assembly (10) or the intermediate transmission assembly (20), and the output end of the driving source is connected to the backrest connection assembly (10) or the intermediate transmission assembly (20). The foot connection component (30) is connected.
An adjusting device for a seat unit according to claim 12 or 13, characterized in that the driving source is a linear motor, the linear motor has an output shaft, and the output shaft is connected to the foot connection assembly (30 ) are connected.
An adjusting device for a seat unit according to claim 12 or 13, characterized in that the driving source is a cylinder, the cylinder has a piston rod, and the piston rod is connected to the foot connection assembly (30) .
An adjusting device for a seat unit according to claim 1, characterized in that the first connection member (23) includes an extension part a (234), an extension part b (236) and a first transition section connected in sequence c(235), extension part a(234) and extension part b(236) are parallel, where:

The second hinge hole (232) and the third hinge hole (233) are provided in the extension part a (234), and the first hinge hole (231) is provided in the extension part b (236).
An adjusting device for a seat unit according to claim 2, characterized in that the second connecting member (24) includes an extension portion d (244), an extension portion e (246) and a second transition section connected in sequence. f(245), extension part d(244) and extension part e(246) are parallel, where:

The fifth hinge hole (242) and the sixth hinge hole (243) are provided in the extension part d (244), and the fourth hinge hole (241) is provided in the extension part e (246).
A seating unit, characterized in that it includes a backrest (1), a seat (2), a foot rest (3) and an adjusting device for a seating unit as claimed in any one of claims 1 to 17, wherein:

The backrest connecting block (11) is used to connect the backrest part (1);

The seat frame (21) is used to connect the seat (2);

In the lying position, the height difference between the highest point of the footrest (3) and the highest point of the backrest (1) is not greater than 400mm.