CN216907379U

CN216907379U - Seat extension support, seat extension device and seat

Info

Publication number: CN216907379U
Application number: CN202121557119.0U
Authority: CN
Inventors: 李龙; 杨利明; 沈斌; 陶康明; 王国伟; 叶琦琦; 周炜尧; 吕佐朝; 刘双博
Original assignee: Dewertokin Technology Group Co Ltd
Current assignee: Dewertokin Technology Group Co Ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2022-07-08
Anticipated expiration: 2031-07-09

Abstract

The utility model relates to the field of furniture and discloses a seat stretching support, a seat stretching device and a seat. According to the seat extension support provided by the utility model, two ends of the front support plate of the seat frame are respectively hinged to the seat frame piece and the leg extension assembly, and the seat frame lifting support piece is additionally arranged, so that two ends of the seat frame lifting support piece are respectively and rotatably connected to the middle part of the front support plate of the seat frame and the seat frame fixing piece, and the seat can be switched to a zero-gravity posture by matching with the seat frame lifting support piece when the leg extension assembly is unfolded. According to the seat stretching device provided by the utility model, when the backrest driving component is in the maximum stroke, the included angle a between the seat frame surface of the seat frame component and the backrest and the included angle b between the seat frame surface of the seat frame component and the horizontal plane are limited, so that a zero gravity state is realized, the leg of a user lying on the seat is not lower than the heart, and the non-adaptive state of a special user is relieved.

Description

Seat extension support, seat extension device and seat

Technical Field

The utility model relates to the field of furniture, in particular to a seat stretching support, a seat stretching device and a seat.

Background

In order to meet the requirements of the modern sofa on function diversification and multifunctional conversion application, a multifunctional sofa seat is gradually created, can realize stable conversion from sitting posture, leisure posture to lying posture, meets various requirements of sitting posture, leisure posture, sleeping and the like, and has greater superiority compared with the traditional sofa.

When the multifunctional sofa seat is designed, the method of human engineering, planar bar system kinematics and the like are combined, so that the comfort of the sofa is higher, and the blood circulation of a body is facilitated.

However, when the existing multifunctional sofa seat is in a lying state, the legs of a user are lower than the chest and the heart, and for some special people with low blood pressure, high age and the like, the user can feel uncomfortable after keeping the lying state for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a seat stretching support, a seat stretching device and a seat, which can enable the legs of a user not to be lower than the heart when the seat is in a lying posture state, and relieve the non-adaptive state of a special user.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the seat stretching device has a zero gravity posture and comprises a chassis, a seat stretching bracket, a backrest and a backrest driving assembly, wherein the seat stretching bracket comprises a leg stretching assembly capable of stretching or contracting relative to the chassis and a seat frame assembly hinged to a first hinge point and rotatably connected with the backrest; the backrest driving assembly can drive the backrest to rotate relative to the seat frame assembly;

when the seat stretching device is in a zero-gravity posture, the backrest driving component is in a maximum stroke, included angles between a seat frame surface of the seat frame component and the backrest and a horizontal plane are respectively a and b, a is more than or equal to 20 degrees and less than or equal to 30 degrees, and b is more than or equal to 120 degrees and less than or equal to 150 degrees.

As a preferred technical solution of the seat extension apparatus, the seat frame assembly includes a seat frame member, a seat frame front support plate, a seat frame lifting support member, and a seat frame fixing member, wherein one end of the seat frame front support plate is hinged to a second hinge point with the seat frame member;

the rear end of the leg stretching assembly is hinged with the front end of the seat frame piece at a first hinge point and is hinged with the other end of the seat frame front support plate, one end of the seat frame lifting support piece is hinged with the seat frame fixing piece, and the other end of the seat frame lifting support piece is hinged with the middle part of the seat frame front support plate;

the seat frame piece is provided with a leg opening limiting piece capable of abutting against the leg stretching assembly, and the leg opening limiting piece, the first hinge point and the second hinge point are distributed from front to back along the seat frame piece.

As an optimal technical solution of the seat stretching device, a first mounting column is arranged on the seat frame fixing member, and is used for supporting and limiting the seat frame lifting support member.

As a preferred technical solution of the seat extension apparatus, a second mounting column is disposed on the seat frame member, and the second hinge point is located at a front end of the second mounting column;

the first mounting column is connected with the second mounting column through a first spring, and when the seat frame lifting support is abutted to the first mounting column, the first spring is in a tensioned state.

As a preferable aspect of the seat extension apparatus, the seat frame assembly further includes:

one end of the seat frame rear supporting rod is hinged with the seat frame fixing piece at a third hinge joint point, and the other end of the seat frame rear supporting rod is hinged with the seat frame piece at a fourth hinge joint point;

the seat frame lifting support piece and the seat frame fixing piece are hinged to a fifth hinge point, the fifth hinge point is located at the front end of the third hinge point, and the second hinge point, the second mounting column and the fourth hinge point are distributed from front to back along the seat frame piece.

As a preferable technical solution of the seat stretching device, there are two seat frame assemblies, and the leg stretching assemblies and the seat frame assemblies are arranged in one-to-one correspondence;

the front ends of the two seat frame pieces are connected through a seat frame front supporting piece, and the rear ends of the two seat frame pieces are respectively hinged to two ends of the lower end of the backrest in the width direction;

one end of the backrest driving component is connected to the middle part of the seat frame front supporting piece, the other end of the backrest driving component is hinged to the lower end of the backrest, and a hinged point of the seat frame component and the backrest is located at the upper part of the hinged point of the backrest driving component and the backrest.

As a preferable aspect of the seat stretching device, the seat stretching device further includes:

and the base plate is rotatably connected to the middle part of the seat frame bottom supporting piece through a rotating shaft.

As a preferable aspect of the seat stretching apparatus, the seat stretching apparatus further includes:

the two ends of the seat frame bottom supporting piece are respectively connected to the rear ends of the two seat frame fixing pieces;

the seat frame driving front supporting piece is connected with the seat frame front supporting plate and the seat frame fixing piece of one seat frame assembly in a rotating mode at one end, and connected with the seat frame front supporting plate and the seat frame fixing piece of the other seat frame assembly in a rotating mode at the other end;

one end of the seat frame driving assembly is rotatably connected with the seat frame driving front supporting piece, the other end of the seat frame driving assembly is rotatably connected with the seat frame bottom supporting piece, and the seat frame driving assembly is used for driving the seat frame driving front supporting piece and the seat frame bottom supporting piece to be close to or far away from each other.

As a preferable technical solution of the seat stretcher, the seat stretcher further includes:

one end of the first seat frame driving piece is hinged with the middle part of the front support plate of the seat frame;

one end of the second seat frame driving part is hinged to the seat frame fixing part, the other end of the second seat frame driving part is hinged to the other end of the first seat frame driving part, and the fifth hinge point is located between the sixth hinge point and the third hinge point; the two second seat frame driving pieces are connected through the seat frame driving front supporting piece.

and the outer side of each seat frame fixing piece is fixed with the handrail.

As a preferable technical solution of the seat extension apparatus, a third mounting column is disposed on the seat frame, and the third mounting column is located between the first hinge point and the second hinge point;

the leg stretching assembly is provided with a fourth mounting column, the fourth mounting column is connected with the third mounting column through a second spring, and when the leg stretching assembly and the leg are separated by opening the limiting part, the second spring is in a tensioning state.

A seat extension bracket comprising:

the seat frame assembly comprises a seat frame piece, a seat frame front supporting plate, a seat frame lifting supporting piece and a seat frame fixing piece, wherein one end of the seat frame front supporting plate is hinged with the seat frame piece at a second hinge point;

the rear end of the leg stretching assembly is hinged with the front end of the seat frame piece at a first hinge point and is hinged with the other end of the seat frame front support plate at the same time, one end of the seat frame lifting support piece is hinged with the seat frame fixing piece, and the other end of the seat frame lifting support piece is hinged with the middle part of the seat frame front support plate;

As a preferred technical solution of the seat extension bracket, the seat frame fixing member is provided with a first mounting post for supporting and limiting the seat frame lifting support member;

the maximum distance between the first hinge point and the leg stretching component is L1, and L1 is more than or equal to 500mm and less than or equal to 520 mm.

As a preferred technical solution of the seat extension bracket, a second mounting column is disposed on the seat frame member, and the second hinge point is located at a front end of the second mounting column;

As a preferable aspect of the seat extension bracket, the seat frame assembly further includes:

The utility model also provides a seat comprising the seat extension bracket according to any one of the above aspects or the seat extension device according to any one of the above aspects.

The utility model has the beneficial effects that: according to the seat extension support provided by the utility model, on the basis of the existing seat extension device, two ends of a front support plate of a seat frame are respectively hinged to a seat frame piece and a leg extension component, and a seat frame lifting support piece is additionally arranged, so that two ends of the seat frame lifting support piece are respectively and rotatably connected to the middle part of the front support plate of the seat frame and a seat frame fixing piece, and the multifunctional sofa seat can be switched to a zero-gravity posture by matching with the seat frame lifting support piece when the leg extension component is unfolded.

The seat stretching device provided by the utility model limits the included angle a between the seat frame surface of the seat frame component and the backrest and the included angle b between the seat frame surface of the seat frame component and the horizontal plane when the backrest driving component is in the maximum stroke, so that a is more than or equal to 20 degrees and less than or equal to 30 degrees, b is more than or equal to 120 degrees and less than or equal to 150 degrees, thereby realizing the zero gravity state, leading the legs of a user lying on the seat to be not lower than the heart and relieving the unsuitable state of a special user.

The seat provided by the utility model adopts the seat stretching bracket or the seat stretching device, can realize the zero gravity posture without greatly changing the existing seat structure, and has low cost.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a side view of a seat spreader in a zero-gravity position according to an embodiment of the present invention;

FIG. 2 is a schematic view of a seat extension apparatus in a zero-gravity position according to an embodiment of the present invention;

FIG. 3 is a side view of a seat extension apparatus provided in accordance with an embodiment of the present invention in a sitting position;

FIG. 4 is a side view of a seat extender provided in a TV position in accordance with an embodiment of the present invention;

FIG. 5 is a side view of a seat extension apparatus provided in a recumbent position in accordance with an embodiment of the present invention;

FIG. 6 is a first schematic view of a seat extension apparatus according to an embodiment of the present invention;

FIG. 7 is a second schematic view of a seat extension apparatus according to a first embodiment of the present invention;

fig. 8 to 10 are side views of a seat extension bracket according to an embodiment of the present invention;

fig. 11 is a side view of a seat extension bracket according to a second embodiment of the present invention.

In the figure:

10. a seat frame assembly; 1001. a seat frame member; 1002. a front support plate of the seat frame; 1003. the seat frame lifts the support piece; 1004. a support rod behind the seat frame; 1005. a seat frame fixing member; 1006. a first seat frame driving member; 1007. a second seat frame driving member; 1008. mounting a plate;

11. a leg extension assembly; 1101. a small leg rest; 1102. a leg rest; 1103. a first link; 1104. a second link; 1105. a third link; 1106. a fourth link; 1107. a fifth link; 1108. a sixth link;

12. a seat frame front support; 13. a seat frame rear support; 14. a back drive front support; 15. a seat frame bottom support; 16. the seat frame drives the front supporting piece; 17. a seat frame drive assembly; 18. a backrest drive assembly;

2. a backrest; 3. a rotating shaft; 4. a chassis;

51. the limiting piece is opened by the leg; 52. a third mounting post; 53. a fourth mounting post; 54. a second spring; 55. a second mounting post; 56. a first mounting post; 57. a first spring;

601. an eleventh hinge point; 602. a twelfth hinge point; 603. a thirteenth hinge point; 604. a fourteenth hinge point; 605. a fifteenth hinge point; 606. a sixteenth hinge point; 607. a seventeenth hinge point; 608. an eighteenth hinge point; 609. a nineteenth hinge point; 610. a twentieth hinge point; 611. a first hinge point; 612. an eighth hinge point; 613. a second hinge point; 614. a seventh hinge point; 615. a fifth hinge point; 616. a third hinge point; 617. a fourth hinge point; 618. a sixth hinge point; 619. a tenth hinge point; 620. and a ninth hinge point.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

Example one

As shown in fig. 1 to 7, the present embodiment provides a seat stretching bracket and a seat stretching device, the seat stretching device includes the seat stretching bracket, the seat in the present embodiment mainly refers to a multifunctional sofa seat, and of course, the seat is not limited to a multifunctional sofa seat, and may also be other multifunctional seats.

The seat extension apparatus has a sitting posture, a TV posture, a lying posture, and a zero gravity posture, and can be switched between various postures. Specifically, the seat extension device comprises a chassis 4, a seat extension bracket, a backrest 2 and a backrest driving assembly 18, wherein the seat extension assembly comprises a leg extension assembly 11 capable of extending or retracting relative to the chassis 4 and a seat frame assembly 10 hinged to a first hinge point with the leg extension assembly and rotatably connected to the backrest 2, and the backrest driving assembly 18 can drive the backrest 2 to rotate relative to the seat frame assembly 10.

The chassis 4 is connected to the seat frame assembly 10 through the rotating shaft 3, the chassis 4 mainly plays a supporting role, and the seat frame assembly 10 rotates through the rotating shaft 3, so that the seat rotates; the backrest 2 is driven to rotate relative to the seat frame assembly 10 by the extension or contraction of the leg extension assembly 11 and the backrest driving assembly 18 so as to adjust the included angle between the seat frame surface of the seat frame assembly 10 and the horizontal plane and the included angle between the seat frame surface of the seat frame assembly 10 and the backrest 2, and the seat is switched among the sitting posture, the TV posture, the lying posture and the zero-gravity posture.

It should be noted that the zero-gravity posture means that when the seat extension apparatus is applied, the legs of the user will not be lower than the heart if the user lies on the seat extension apparatus after the seat extension apparatus is adjusted to the zero-gravity posture.

In the embodiment, the included angle between the seat frame surface of the seat frame assembly 10 and the horizontal plane is recorded as a, and a is more than or equal to 3 degrees and less than or equal to 30 degrees; the included angle between the seat frame surface of the seat frame assembly 10 and the backrest 2 is marked as b, and b is more than or equal to 90 degrees and less than or equal to 150 degrees. When the backrest driving component 18 is limited to be in the maximum stroke, a is more than or equal to 20 degrees and less than or equal to 30 degrees, and b is more than or equal to 120 degrees and less than or equal to 150 degrees, so that the seat stretching device has zero gravity posture, the legs of a user lying on the seat are not lower than the heart, and the maladaptive state of a special user is relieved.

As shown in fig. 8 to 10, the seat frame assembly 10 includes a seat frame member 1001, a seat frame front support plate 1002, a seat frame lift support 1003, and a seat frame fixing member 1005; the leg extension assembly 11 comprises a small leg rest 1101, a leg rest 1102, a first link 1103, a second link 1104, a third link 1105, a fourth link 1106, a fifth link 1107 and a sixth link 1108, wherein the small leg rest 1101 is hinged with one end of the second link 1104 at an eleventh hinge point 601, the small leg rest 1101 is hinged with one end of the leg rest 1102 at a twelfth hinge point 602, the middle part of the second link 1104 is hinged with one end of the third link 1105 at a thirteenth hinge point 603, the middle part of the third link 1105 is hinged with the middle part of the leg rest 1102 at a fourteenth hinge point 604, the other end of the third link 1105 is hinged with one end of the first link 1103 at a fifteenth hinge point 605, the other end of the second link 1104 is hinged with one end of the fourth link 1106 at a sixteenth hinge point 606, the middle part of the first link 1103 is hinged with the middle part of the fourth link 1106 at a seventeenth hinge point 607, and the other end of the fourth link 1106 is hinged with one end of the sixth link 1108 at an eighteenth hinge point 608, the other end of the first link 1103 and one end of the fifth link 1107 are hinged to a nineteenth hinge point 609, the middle of the sixth link 1108 and the middle of the fifth link 1107 are hinged to a twentieth hinge point 610, the other end of the fifth link 1107 and the seat frame member 1001 are hinged to a first hinge point 611, and the other end of the sixth link 1108 and one end of the seat frame lifting support member 1003 are hinged to an eighth hinge point 612.

One end of the seat frame front support plate 1002 is hinged to the second hinge point 613 with the seat frame member 1001, one end of the seat frame lifting support member 1003 is hinged to the fifth hinge point 615 with the seat frame fixing member 1005, and the other end is hinged to the seventh hinge point 614 with the middle portion of the seat frame front support plate 1002. A leg opening limiting member 51 capable of abutting against the leg stretching assembly 11 is disposed on the seat frame member 1001, and the leg opening limiting member 51, the first hinge point 611 and the second hinge point 613 are distributed along the seat frame member 1001 from front to back.

Note that the upper surface of the bezel assembly 10 refers to the upper surface of the bezel member 1001.

In this embodiment, two seat frame assemblies 10 are provided, the leg stretching assemblies 11 correspond to the seat frame assemblies 10 one by one, the front ends of the two seat frame members 1001 are connected through a seat frame front supporting member 12, and the rear ends of the two seat frame members 1001 are respectively hinged to two ends of the lower end of the backrest 2 in the width direction; one end of the backrest driving component 18 is connected to the middle part of the seat frame front support 12, the other end is hinged to the lower end of the backrest 2, and the hinge point of the seat frame 1001 and the backrest 2 is located at the upper part of the hinge point of the backrest driving component 18 and the backrest 2. Rotation of the backrest relative to the seat frame assembly 10 is accomplished by a backrest drive assembly 18.

In order to guide and support the movement of the backrest driving unit 18, one of the seat frames 1001 is connected to a backrest driving front support 14, and the middle portion of the backrest driving unit 18 is fixedly connected to the backrest driving front support 14.

In order to improve the stability of the connection between the two seat frame assemblies 10, the seat extension apparatus further includes a rear seat frame supporter 13, and both ends of the rear seat frame supporter 13 are connected to the rear ends of the two seat frames 1001, respectively.

The seat stretching device further comprises a seat frame bottom support 15, a seat frame driving front support 16 and a seat frame driving assembly 17, wherein two ends of the seat frame bottom support 15 are respectively connected to the rear ends of two seat frame fixing members 1005, one end of the seat frame driving front support 16 is rotatably connected to the seat frame front support plate 1002 and the seat frame fixing member 1005 of one seat frame assembly 10, and the other end is rotatably connected to the seat frame front support plate 1002 and the seat frame fixing member 1005 of the other seat frame assembly 10; one end of the seat frame driving assembly 17 is rotatably connected to the seat frame driving front supporting member 16, and the other end of the seat frame driving assembly 17 is rotatably connected to the seat frame bottom supporting member 15, and the seat frame driving assembly 17 is used for driving the seat frame driving front supporting member 16 and the seat frame bottom supporting member 15 to approach or separate from each other, so as to extend or contract the leg extending assembly 11 relative to the chassis 4, and adjust an included angle between a seat frame surface and a horizontal plane of the seat frame member 1001.

It should be noted that, in the present embodiment, the chassis 4 is fixedly connected to the middle portion of the seat frame bottom support 15 to connect the chassis 4 to the seat frame assembly 10.

In order to rotatably connect the front seat frame driving support 16 to the seat frame assembly 10, the seat extension device further includes a first seat frame driving member 1006 and a second seat frame driving member 1007, the first seat frame driving member 1006 and the second seat frame driving member 1007 are respectively in one-to-one correspondence with the seat frame assembly 10, one end of the first seat frame driving member 1006 is hinged to the ninth hinge point 620 with the middle portion of the front seat frame support plate 1002, one end of the second seat frame driving member 1007 is hinged to the sixth hinge point 618 with the seat frame fixing member 1005, the other end of the second seat frame driving member is hinged to the tenth hinge point 619 with the other end of the first seat frame driving member 1006, and the fifth hinge point 615 is located between the sixth hinge point 618 and the third hinge point 616; the two second seat frame drivers 1007 are connected by the seat frame driving front support 16.

It should be noted that the structures of the seat frame driving assembly 17 and the backrest driving assembly 18 are electric structures in the prior art, and are not described in detail herein.

Further, the seat frame fixing piece 1005 is provided with a first mounting column 56 for supporting and limiting the seat frame lifting support 1003. The seat frame lifting support 1003 is supported and limited by the first mounting column 56 to support the seat frame 1001, so that the seat frame 1001 is prevented from sinking.

The specific process of switching the seat extension device to the zero gravity posture is as follows:

the seat frame driving assembly 17 pushes the seat frame driving front supporting member 16, the seat frame driving front supporting member 16 is connected with the first seat frame driving member 1006, the first seat frame driving member 1006 pushes the seat frame front supporting plate 1002 forwards around the second seat frame driving member 1007 as a radius, the seat frame front supporting plate 1002 is in contact with the first mounting post 56, the seat frame member 1001 is driven to rotate by the rotation of the seat frame front supporting plate 1002 around a hinge shaft connecting the seat frame front supporting plate 1002 and the seat frame lifting supporting member 1003, and meanwhile, the fifth connecting rod 1107 is driven to move backwards, so that the leg stretching assembly 11 is gradually stretched until the fifth connecting rod 1107 is in contact with the leg opening limiting member 51, and the seat is switched to the leg opening state.

The first seat frame driving member 1006 continues to push the front seat frame supporting plate 1002 upward around the second seat frame driving member 1007 as a radius, and the front seat frame supporting plate 1002 drives the seat frame lifting supporting member 1003 to move upward, so that the front seat frame supporting plate 1002 is separated from the first mounting post 56, so as to switch the seat to a zero-gravity posture, so that the legs of the user lying on the seat are not lower than the heart, and the non-adaptive state of the special user is relieved.

In summary, the seat extension apparatus provided in this embodiment is adopted, the two ends of the front seat frame support plate 1002 are respectively hinged to the seat frame member 1001 and the leg extension assembly 11, and the seat frame lifting support member 1003 is additionally provided, so that the two ends of the seat frame lifting support member 1003 are respectively rotatably connected to the middle of the front seat frame support plate 1002 and the seat frame fixing member 1005, so that the leg extension assembly 11 is matched with the seat frame lifting support member 1003 when being unfolded, the seat can be switched to a zero gravity posture, the legs of the user lying on the seat are not lower than the heart, and the non-adaptive state of the special user is alleviated.

Further, a second mounting column 55 is disposed on the seat frame 1001, and a second hinge point 613 is disposed between the first hinge point 611 and the second mounting column 55; the first mounting post 56 and the second mounting post 55 are connected by a first spring 57, and when the bezel lifting support 1003 abuts against the first mounting post 56, the first spring 57 is in a tensioned state.

With the above arrangement, the first spring 57 is used to realize that the leg stretching assembly 11 in the contracted state is firstly unfolded to switch the multifunction seat to the leg-opened state, and then the seat frame member 1001 is controlled to be lifted to switch the multifunction seat to the zero-gravity posture. It should be noted that, when the seat is in the sitting posture, the first spring 57 is in the natural state, and after the leg stretching assembly 11 stretches to switch the seat to the TV posture or the lying posture, the first spring 57 is in the tensioned state; the tension of the first spring 57 is greater when the seat is in the zero gravity position than when the seat is in the TV position or the recumbent position.

It should be further noted that the first spring 57 can be eliminated, and the leg extension assembly 11 can be expanded and the seat frame member 1001 can be lifted by the gravity or external force of the seat frame assembly 10, and the leg extension assembly 11 can be contracted and the seat frame member 1001 can be lowered by the external force.

Further, the seat frame assembly 10 further includes a seat frame rear supporting rod 1004, one end of the seat frame rear supporting rod 1004 is hinged to the third hinge point 616 with the seat frame fixing member 1005, and the other end is hinged to the fourth hinge point 617 with the seat frame member 1001; the fifth hinge point 615 and the third hinge point 616 are located along the bezel fixture 1005 in a front-to-back manner, and the second mounting post 55 is located between the second hinge point 613 and the fourth hinge point 617. Stability of the multifunction seat during switching to the zero-gravity attitude is improved by the seat frame rear support bar 1004.

Further, as shown in fig. 6, the seat extension device further includes an armrest, and an outer side of each seat frame fixing member 1005 is fixed with the armrest. The armrest may be directly fixed to the outer side of the seat frame fixing member 1005, or the armrest may be fixed to the mounting plate 1008, and the mounting plate 1008 may be fixedly mounted to the outer side of the seat frame fixing member 1005.

When the seat extension device is in a sitting position, the height between the seat frame surface of the seat frame assembly 10 and the lower surface of the chassis 4 is H1, H1 is more than 320 mm; when the seat extension apparatus is in the TV posture and the zero gravity posture, the distance between the first hinge point 611 and the small footrest 1101 is the largest, and the distance is marked as L1, and L1 mm is greater than or equal to 500mm and less than or equal to 520 mm.

The seat that this embodiment provided extends the support, on current seat extension device's basis, articulates the both ends of backup pad respectively before the seat frame in seat frame spare and shank extension subassembly to add seat frame lifting support piece, make seat frame lifting support piece's both ends rotate respectively and connect middle part and seat frame mounting in backup pad before the seat frame, cooperation seat frame lifting support piece when making the shank extension subassembly expand, can switch over multi-functional sofa seat to zero gravity gesture.

The seat extension device provided by the embodiment limits the included angle a between the seat frame surface of the seat frame assembly and the backrest and the included angle b between the seat frame surface of the seat frame assembly and the horizontal plane when the backrest driving assembly is in the maximum stroke, so that a is more than or equal to 20 degrees and less than or equal to 30 degrees, b is more than or equal to 120 degrees and less than or equal to 150 degrees, thereby realizing a zero-gravity state, enabling the legs of a user lying on the seat to be not lower than the heart, and relieving the inadaptable state of a special user.

The embodiment also provides a seat, which comprises the seat stretching device or the seat stretching device, and the zero gravity posture can be realized without large change of the existing seat structure, so that the cost is low.

Example two

The difference between this embodiment and the first embodiment is: the seat stretching device is a structure of manual control action.

Specifically, as shown in fig. 11, the seat frame driving front support 16, the seat frame driving assembly 17, the first seat frame driving member 1006 and the second seat frame driving member 1007 in the first embodiment are eliminated, and the backrest driving assembly 18 in the first embodiment is replaced with a gas spring.

The seat frame 1001 is provided with a third mounting column 52, and the third mounting column 52 is located between the first hinge point 611 and the second hinge point 613; the leg stretching assembly 11 is provided with a fourth mounting column 53, the fourth mounting column 53 is connected with the third mounting column 52 through a second spring 54, and when the leg stretching assembly 11 is separated from the leg opening limiting member 51, the second spring 54 is in a tensioned state. When the seat is switched to the sitting position, the entire leg extension assembly 11 is in the folded state using the tension provided by the second spring 54.

Specifically, the first hinge point 611, the second mounting column 55 and the second hinge point 613 are sequentially distributed, and the fourth mounting column 53 is located between the twentieth hinge point 610 and the first hinge point 611.

In the case of a manually controlled seat extension device, the armrest must be directly fixed to the outside of the seat frame attachment 1005.

the seat frame member 1001 and the fifth link 1107 are pushed by the pushing handrail reaction force to simultaneously move rearward until the fifth link 1107 comes into contact with the leg opening restriction member 51, thereby completing the leg opening state.

When the armrest is pushed continuously, the front seat frame supporting plate 1002 drives the seat frame lifting support 1003 to move upwards, so that the front seat frame supporting plate 1002 is separated from the first mounting column 56, and the seat extension device is switched to the zero gravity posture.

The first spring 57 is in a natural state when the seat extension device is in a zero gravity position.

It should be further added that the fixed connection mentioned in the present invention is a bolt connection or a welding connection, and the rotating connection is a hinge connection.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims

1. A seat extension device having a zero gravity position comprising a chassis (4), a seat extension bracket, a backrest (2) and a backrest drive assembly (18), the seat extension bracket comprising a leg extension assembly (11) that is extendable or retractable relative to the chassis (4), and a seat frame assembly (10) hinged to the leg extension assembly (11) at a first hinge point (611) and rotatably connected to the backrest (2); the backrest driving assembly (18) can drive the backrest (2) to rotate relative to the seat frame assembly (10); it is characterized in that the preparation method is characterized in that,

when the seat stretching device is in a zero-gravity posture, the backrest driving component (18) is in the maximum stroke, the included angles between the seat frame surface of the seat frame component (10) and the backrest (2) and the horizontal plane are respectively a and b, a is more than or equal to 20 degrees and less than or equal to 30 degrees, and b is more than or equal to 120 degrees and less than or equal to 150 degrees.

2. Seat stretching apparatus according to claim 1, wherein said seat frame assembly (10) comprises a seat frame member (1001), a front seat frame support plate (1002), a seat frame lifting support member (1003) and a seat frame fixing member (1005), one end of said front seat frame support plate (1002) being hinged to said seat frame member (1001) at a second hinge point (613);

the rear end of the leg stretching assembly (11) is hinged to a first hinge point (611) with the front end of the seat frame piece (1001) and is hinged to the other end of the seat frame front support plate (1002), one end of the seat frame lifting support piece (1003) is hinged to the seat frame fixing piece (1005), and the other end of the seat frame lifting support piece is hinged to the middle of the seat frame front support plate (1002);

the seat frame member (1001) is provided with a leg opening limiting member (51) capable of abutting against the leg stretching assembly (11), and the leg opening limiting member (51), the first hinge point (611) and the second hinge point (613) are distributed from front to back along the seat frame member (1001).

3. The seat extension arrangement according to claim 2, wherein the seat frame fixing member (1005) is provided with a first mounting post (56) for supporting and limiting the seat frame lifting support (1003).

4. Seat extension arrangement according to claim 3, wherein a second mounting post (55) is provided on the seat frame member (1001), the second hinge point (613) being located at a front end of the second mounting post (55);

the first mounting column (56) and the second mounting column (55) are connected through a first spring (57), and when the seat frame lifting support (1003) abuts against the first mounting column (56), the first spring (57) is in a tensioned state.

5. The seat extension arrangement according to claim 4, wherein the seat frame assembly (10) further comprises:

a seat frame rear supporting rod (1004), wherein one end of the seat frame rear supporting rod (1004) is hinged with the seat frame fixing piece (1005) at a third hinge point (616), and the other end of the seat frame rear supporting rod is hinged with the seat frame piece (1001) at a fourth hinge point (617);

the seat frame lifting support piece (1003) is hinged to a fifth hinge point (615) with the seat frame fixing piece (1005), the fifth hinge point (615) is located at the front end of the third hinge point (616), and the second hinge point (613), the second mounting column (55) and the fourth hinge point (617) are distributed from front to back along the seat frame piece (1001).

6. The seat extension arrangement according to claim 5, wherein there are two seat frame assemblies (10), and the leg extension assemblies (11) are arranged in one-to-one correspondence with the seat frame assemblies (10);

the front ends of the two seat frame pieces (1001) are connected through a seat frame front supporting piece (12), and the rear ends of the two seat frame pieces (1001) are respectively hinged to two ends of the lower end of the backrest (2) in the width direction;

one end of the backrest driving component (18) is connected to the middle of the seat frame front supporting piece (12), the other end of the backrest driving component is hinged to the lower end of the backrest (2), and a hinged point of the seat frame piece (1001) and the backrest (2) is located at the upper part of the hinged point of the backrest driving component (18) and the backrest (2).

7. The seat extension apparatus of claim 6, further comprising:

a seat frame bottom support (15), wherein two ends of the seat frame bottom support (15) are respectively connected to the rear ends of the two seat frame fixing pieces (1005);

a seat frame driving front support member (16), one end of the seat frame driving front support member (16) is simultaneously and rotatably connected to the seat frame front support plate (1002) and the seat frame fixing member (1005) of one seat frame assembly (10), and the other end of the seat frame driving front support member is rotatably connected to the seat frame front support plate (1002) and the seat frame fixing member (1005) of the other seat frame assembly (10);

the seat frame driving assembly (17), one end of the seat frame driving assembly (17) is rotatably connected to the seat frame driving front supporting piece (16), the other end of the seat frame driving assembly is rotatably connected to the seat frame bottom supporting piece (15), and the seat frame driving assembly (17) is used for driving the seat frame driving front supporting piece (16) and the seat frame bottom supporting piece (15) to be close to or far away from each other.

8. The seat extension arrangement according to claim 7, further comprising, in one-to-one correspondence with the seat frame assembly (10):

one end of the first seat frame driving piece (1006) is hinged with the middle part of the seat frame front supporting plate (1002);

a second seat frame driving member (1007), one end of the second seat frame driving member (1007) is hinged to a sixth hinge point (618) with the seat frame fixing member (1005), and the other end is hinged to the other end of the first seat frame driving member (1006), and the fifth hinge point (615) is located between the sixth hinge point (618) and the third hinge point (616); the two second seat frame driving pieces (1007) are connected through the seat frame driving front supporting piece (16).

9. The seat extension apparatus of claim 2, further comprising:

the outer side of each seat frame fixing piece (1005) is fixed with the handrail.

10. Seat stretching device according to claim 2, wherein a third mounting post (52) is provided on said seat frame member (1001), said third mounting post (52) being located between said first hinge point (611) and said second hinge point (613);

the leg stretching assembly (11) is provided with a fourth mounting column (53), the fourth mounting column (53) is connected with the third mounting column (52) through a second spring (54), and when the leg stretching assembly (11) is separated from the leg opening limiting part (51), the second spring (54) is in a tensioning state.

11. A seat extension support, comprising:

the seat frame assembly (10) comprises a seat frame piece (1001), a seat frame front supporting plate (1002), a seat frame lifting supporting piece (1003) and a seat frame fixing piece (1005), wherein one end of the seat frame front supporting plate (1002) is hinged to a second hinge point (613) together with the seat frame piece (1001);

a leg extension assembly (11), wherein the rear end of the leg extension assembly (11) is hinged to a first hinge point (611) with the front end of the seat frame member (1001), and is hinged to the other end of the seat frame front support plate (1002), one end of the seat frame lifting support member (1003) is hinged to the seat frame fixing member (1005), and the other end of the seat frame lifting support member is hinged to the middle of the seat frame front support plate (1002);

a leg opening limiting piece (51) capable of abutting against the leg stretching assembly (11) is arranged on the seat frame piece (1001), and the leg opening limiting piece (51), the first hinge point (611) and the second hinge point (613) are distributed along the seat frame piece (1001) from front to back;

the maximum distance between the first hinge point (611) and the leg stretching component (11) is L1, and L1 mm is more than or equal to 500mm and less than or equal to 520 mm.

12. The seat extension bracket of claim 11, wherein the seat frame fixing member (1005) is provided with a first mounting post (56) for supporting and limiting the seat frame lifting support (1003).

13. The seat extension bracket according to claim 12, wherein a second mounting post (55) is provided on the seat frame member (1001), the second hinge point (613) being located at a forward end of the second mounting post (55);

14. The seat extension bracket of claim 13 wherein said seat frame assembly (10) further comprises:

15. A seat comprising a seat extension arrangement as claimed in any one of claims 1 to 10 or a seat extension support as claimed in any one of claims 11 to 14.