CN113907551B - Seat stretching device capable of providing zero gravity posture and seat support - Google Patents

Seat stretching device capable of providing zero gravity posture and seat support Download PDF

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Publication number
CN113907551B
CN113907551B CN202111256078.6A CN202111256078A CN113907551B CN 113907551 B CN113907551 B CN 113907551B CN 202111256078 A CN202111256078 A CN 202111256078A CN 113907551 B CN113907551 B CN 113907551B
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CN
China
Prior art keywords
foot rest
linkage
seat
connecting rod
hinged
Prior art date
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Active
Application number
CN202111256078.6A
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Chinese (zh)
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CN113907551A (en
Inventor
李晓鸿
李元坤
吕战征
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ruimai Technology Co ltd
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Remacro Machinery and Technology Wujiang Co Ltd
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Application filed by Remacro Machinery and Technology Wujiang Co Ltd filed Critical Remacro Machinery and Technology Wujiang Co Ltd
Priority to CN202111256078.6A priority Critical patent/CN113907551B/en
Publication of CN113907551A publication Critical patent/CN113907551A/en
Priority to PCT/CN2022/125374 priority patent/WO2023071831A1/en
Application granted granted Critical
Publication of CN113907551B publication Critical patent/CN113907551B/en
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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/002Chair or stool bases
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Supports for the head or the back
    • A47C7/40Supports for the head or the back for the back
    • A47C7/46Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/50Supports for the feet or the legs
    • A47C7/506Supports for the feet or the legs of adjustable type
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/50Supports for the feet or the legs
    • A47C7/506Supports for the feet or the legs of adjustable type
    • A47C7/5066Supports for the feet or the legs of adjustable type by rotation
    • A47C7/5068Supports for the feet or the legs of adjustable type by rotation actuated by linkages

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

The invention relates to a seat stretching device and a seat support, which can provide a zero gravity posture, and comprises a linkage support, a back mechanism and a foot rest mechanism, wherein the linkage support is rotationally connected between the foot rest mechanism and the back mechanism; the foot rest mechanism comprises a connecting rod assembly, a first foot rest, a linkage rod, a second foot rest and a foot rest connecting piece, wherein the connecting rod assembly is used for being rotationally connected to the linkage bracket; the first foot rest is hinged with the second connecting rod, the second foot rest is hinged with the fourth connecting rod, the linkage rod is rotationally connected between the first foot rest and the fourth connecting rod, and the foot rest connecting piece is rotationally connected between the second connecting rod, the fourth connecting rod and the second foot rest; when the seat extension device is in the zero gravity posture, the height difference H between the highest point of the second foot rest and the highest point of the back mechanism in the vertical direction is 200mm-450mm. By adopting the invention, the flexibility and the extension height of the leg rest mechanism can be improved, the inclination angle of the seat in the lying state can be increased, and the zero-gravity lying posture of the zero seat can be realized.

Description

Seat stretching device capable of providing zero gravity posture and seat support
Technical Field
The invention relates to the technical field of sofa supports, in particular to a seat stretching device capable of providing a zero gravity posture and a seat support.
Background
With the improvement of living standard of people, functional sofas and seats are more and more common in life. With the wide application of functional sofas, the comfort requirement for sofa seats is also increasing. Functional seats are generally provided with mechanical stretching devices, so that the seat can be adjusted among sitting, leisure and lying positions.
The existing seat device has the following defects: the extending distance of the foot rest mechanism is generally shorter and is limited by the support seat part structure, and if the extending length of the foot rest mechanism is only increased, the foot rest mechanism is easy to rub against the ground and the stability of the seat is affected; the seat leg rest mechanism can only rotate simply, the whole extension length is shorter, the leg height is lower when in a lying position, the zero gravity gesture that the leg height is close to the head height cannot be realized, and the comfort of the seat is affected;
The separation rotation of extension bracket is nimble inadequately in current mechanical stretching device with extension bracket, and the distance is less between two brackets, and the whole inclination of seat and extension bracket mechanism extend the height and be off-the-shelf for the height, can not realize zero gravity gesture.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a seat extension device and a seat support that can provide a zero gravity posture, wherein the inclination angle of the seat in the recumbent posture can be increased by optimizing the dimensional proportion of the seat extension device structure and the adjustment part, and the extension length and the height of the leg rest mechanism can be increased to achieve the zero gravity posture of the seat.
In order to solve the problems, the invention provides a seat stretching device capable of providing a zero gravity posture, which comprises a linkage bracket, a back mechanism and a foot rest mechanism, wherein the linkage bracket is rotatably connected between the foot rest mechanism and the back mechanism;
the foot rest mechanism comprises a connecting rod assembly, a first foot rest, a linkage rod, a second foot rest and a foot rest connecting piece, wherein the connecting rod assembly is used for being rotationally connected with the linkage bracket; the first foot rest is hinged with a second connecting rod of the connecting rod assembly, the second foot rest is hinged with a fourth connecting rod of the connecting rod assembly, one end of the linkage rod is hinged with the first foot rest, the other end of the linkage rod is hinged with the fourth connecting rod, and the foot rest connecting piece is rotationally connected between the second connecting rod, the fourth connecting rod and the second foot rest;
when the seat extension device is in a zero gravity posture, the height difference H between the highest point of the second foot rest and the highest point of the back mechanism in the vertical direction is 200-450 mm.
Further, the foot rest connecting piece comprises a first connecting piece and a second connecting piece, one end of the first connecting piece is hinged to the middle of the second foot rest, the other end of the first connecting piece is hinged to one end of the second connecting piece, the other end of the second connecting piece is hinged to the middle of the second connecting rod, and the middle of the second connecting piece is hinged to the middle of the fourth connecting rod.
Further, the connecting rod assembly comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, wherein the second connecting rod is hinged with the first connecting rod, the fourth connecting rod is hinged with the third connecting rod, and the first connecting rod and the third connecting rod are rotatably connected with the linkage support.
Further, the middle part of second foot rest is provided with first locating part, works as first locating part with the second connecting piece cooperation is supported when leaning on, the extreme position is contracted to the second foot rest for prevent that the foot rest from appearing not hard up phenomenon.
Further, a foot rest connecting point, a linkage rod connecting point and a connecting piece connecting point are sequentially arranged at one end of the fourth connecting rod, which is close to the second foot rest;
The fourth connecting rod is in foot rest tie point department with the second foot rest is connected, the fourth connecting rod be in trace tie point department with the trace is connected, the fourth connecting rod be in connecting piece tie point department with the second connecting piece is connected, the trace tie point sets up foot rest tie point with between the connecting piece tie point.
Further, a second connecting rod connecting point and a linkage point are arranged on the first foot rest, and the distance from the linkage point to the linkage rod connecting point is larger than the distance from the linkage point to the second connecting rod connecting point.
Further, when the leg rest mechanism extends from the retracted position to the extreme position, the leg rest surfaces of the first and second leg rests rotate upward, and the first and second leg rests are spaced apart from one another.
Preferably, the first foot rest is spaced from the second foot rest by a distance L of no less than 140mm when the foot rest mechanism is extended to an extreme position.
The invention also provides a seat support, which comprises a linkage support, a back mechanism and a foot rest mechanism, wherein the linkage support is rotationally connected between the foot rest mechanism and the back mechanism;
the foot rest mechanism comprises a connecting rod assembly, a first foot rest, a linkage rod, a second foot rest and a foot rest connecting piece, wherein the connecting rod assembly is used for being rotationally connected with the linkage bracket; the first foot rest is hinged with a second connecting rod of the connecting rod assembly, the second foot rest is hinged with a fourth connecting rod of the connecting rod assembly, one end of the linkage rod is hinged with the first foot rest, the other end of the linkage rod is hinged with the fourth connecting rod, and the foot rest connecting piece is rotationally connected between the second connecting rod, the fourth connecting rod and the second foot rest;
The linkage support comprises a supporting structure and side plates, seat frame installation surfaces for installing seat frames are arranged on the side plates, when the seat stretching device is in a zero gravity posture, an included angle alpha between the seat frame installation surfaces and a horizontal plane is not smaller than 18 degrees, and an included angle beta between the back mechanism and the horizontal plane is not larger than 20 degrees.
Preferably, when the seat extension device is in a zero gravity posture, the angle α between the seat frame mounting surface and the horizontal plane is 23 °, and the corresponding angle β between the back mechanism and the horizontal plane is 14 °.
Preferably, the angle alpha between the seat frame mounting surface and the horizontal plane is 27-32 degrees when the seat extension device is in the zero gravity posture.
Further, the support structure comprises a base, a first support piece, a second support piece and a base linkage assembly;
The first supporting piece and the second supporting piece are rotationally connected to two ends of the base, and the base linkage assembly is rotationally connected to the side plate and arranged between the first supporting piece and the second supporting piece.
Further, the base linkage assembly comprises a middle connecting piece, a seat linkage piece and a crank piece;
One end of the middle connecting piece is connected with the crank piece, the other end of the middle connecting piece is connected with the seat interlocking piece, and the crank piece is respectively connected with the first supporting piece and the side plate.
Further, the seat linkage member is provided with a support connection point for being connected with the second support member, a back connection point for being connected with the back mechanism and a linkage point for being connected with the middle connection member;
the ratio of the distance from the linkage point to the support connection point to the distance from the linkage point to the back connection point is 0.65-0.95.
Further, the back mechanism includes a back mount for mounting a seat back and hinged to the side plate, and a back linkage hinged between the back mount and the seat linkage.
Due to the technical scheme, the invention has the following beneficial effects:
The first foot rest of the foot rest mechanism is hinged with the fourth connecting rod through the linkage rod, so that the first foot rest and the second foot rest can be more flexibly closed and separated, and when the foot rest is contracted, the two foot rests are retracted and closed, so that the occupied space is small; when stretching, the stretching length of the foot rest mechanism is increased, the legs and feet can be better supported, the comfort of the seat is improved, and the use requirements of users with different heights are met.
In the stretching process, the linkage support drives the side plates and the seat frame to increase the inclination angle, the stretching height of the foot rest mechanism is increased, the gravity center of the back is lowered, and the foot rest mechanism is matched with the linkage support to enable the seat to realize a zero gravity posture.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the following description will make a brief introduction to the drawings used in the description of the embodiments or the prior art. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic view of a zero gravity attitude structure of a seat extension apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of a rest position of a seat extension apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic view of a seating position of a seat extension device in accordance with an embodiment of the present invention;
FIG. 4 is a schematic view of the foot rest mechanism of an embodiment of the present invention;
fig. 5 is a schematic view of another structure of fig. 3.
Wherein, the reference numerals are as follows: the device comprises a 10-linkage bracket, a 11-back mechanism, a 111-back mounting piece, a 112-back linkage piece, a 20-foot rest mechanism, a 1-first connecting rod, a 2-second connecting rod, a 21-first connecting point, a 22-second connecting point, a 3-third connecting rod, a 4-fourth connecting rod, a 41-foot rest connecting point, a 42-linkage rod connecting point, a 43-connecting piece connecting point, a 5-first foot rest piece, a 51-second connecting rod connecting point, a 52-linkage point, a 6-linkage rod, a 7-second foot rest piece, a 71-first limiting piece, an 8-foot rest connecting piece, a 81-first connecting piece, a 82-second connecting piece, a 9-foot rest assembly, a 91-first foot rest plate, a 92-second foot rest plate, a 12-supporting structure, a 121-base, a 122-first supporting piece, a 123-second supporting piece, a 124-base assembly, a 125-middle connecting piece, a 126-seat linkage piece, a 1261-supporting connecting point, a 2-back connecting point, a 3-crank piece, a 127-crank piece, a 13-first linkage structure, a 13-second connecting piece, a second supporting structure, a 151-second supporting structure, a transmission structure, a 151-second side plate, a transmission structure, a 151-second side plate, and a transmission structure.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific 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 a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may include one or more of the feature, either explicitly or implicitly. Moreover, the terms "first," "second," and the like, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein.
Examples
The embodiment provides a seat stretching device capable of providing a zero gravity posture, which is shown in fig. 1-5, and comprises a linkage bracket 10, a back mechanism 11 and a foot rest mechanism 20, wherein the linkage bracket 10 is rotatably connected between the foot rest mechanism 20 and the back mechanism 11;
The foot rest mechanism 20 comprises a connecting rod assembly 30, a first foot rest 5, a linkage rod 6, a second foot rest 7 and a foot rest connecting piece 8, wherein the connecting rod assembly 30 is used for being rotatably connected to the linkage support 10; the first foot rest 5 is hinged with the second connecting rod 2 of the connecting rod assembly 30, the second foot rest 7 is hinged with the fourth connecting rod 4 of the connecting rod assembly 30, one end of the linkage rod 6 is hinged with the first foot rest 5, the other end of the linkage rod 6 is hinged with the fourth connecting rod 4, and the foot rest connecting piece 8 is rotatably connected among the second connecting rod 2, the fourth connecting rod 4 and the second foot rest 7; the height difference H between the highest point of the second foot rest 7 and the highest point of the back mechanism 11 in the vertical direction is 200mm-450mm when the seat extension device is in the zero gravity position.
In this embodiment, first foot rest 5 is articulated with fourth connecting rod 4 through trace 6, and the fourth connecting rod is connected with the second foot rest, and first foot rest 5 does not have connection relation with the fourth connecting rod, has increased the motion flexibility of first foot rest and second foot rest in shrink or extension in-process. The first foot rest 5, the linkage rod 6, the fourth connecting rod 4, the second connecting piece 82 and the second connecting rod 2 form a five-connecting-rod mechanism, the second foot rest can be more flexibly close to or separated from the first foot rest, the distance between the first foot rest and the second foot rest after separation is increased, and the extension distance of the second foot rest is increased.
In this embodiment, the back rest mount is used in connection with the seat back, and the seat is tilted as a whole when the seat extension device is in the zero gravity position. In some embodiments, the difference in height in the vertical direction between the highest point of the second foot rest 7 and the highest point of the back mechanism 11 may be up to 200mm, 250mm, 280mm, 300mm, 310mm, 320mm, 350mm, 400mm or 450mm. For example, in the present embodiment, when the seat extension device is in the zero gravity posture, the distance from the highest point of the second foot rest 7 to the horizontal support surface is 580mm, the distance from the backrest mounting point 111 to the horizontal support surface is 270mm, and the height difference H reaches 310mm. In other embodiments, the distance from the highest point of the second foot rest 7 to the horizontal support surface is 610mm, the distance from the back mounting point 111 to the horizontal support surface is 260mm, and the height difference H may be up to 350mm when the seat extension apparatus is in the zero gravity position. When the seat is in the zero gravity posture, the feet and the head of the user can be at the same height after lying down, the need of the body for resisting gravity can be reduced to the greatest extent, and the user experiences a relaxed feeling similar to the loss of weight in space.
Specifically, the linkage support 10 includes a support structure 12 and a side plate 14, the side plate 14 is provided with a seat frame mounting surface 141 for mounting a seat frame, when the seat stretching device is in a zero gravity posture, an included angle α between the seat frame mounting surface 141 and a horizontal plane is not less than 18 °, preferably, when the seat stretching device is in the zero gravity posture, the included angle α between the seat frame mounting surface and the horizontal plane may be 27 ° -32 °. In some embodiments, 18 °, 20 °, 22 °, 24 °,25 °, 27 °, 28 °, 30 °, or 32 °. The backrest mount 111 lies back and has an angle β to the horizontal of no more than 20 °, preferably 14 °, 16 °,17 °, 18 ° or 20 °. For example, in some embodiments, the seat frame mounting surface 141 is at an angle of 20 ° to the horizontal and the centerline of the back mount 111 is at an angle of 16 ° to the horizontal when the seat extension device is in the zero gravity position. In other embodiments, the seat frame mounting surface 141 is at an angle of 23 ° to the horizontal and the centerline of the backrest mount 111 is at an angle of 14 ° to the horizontal when the seat extension device is in the zero gravity position.
The angle between the back mechanism and the horizontal plane is smaller when the seat device is in the lying position, the inclination angle of the seat frame is increased, and the lying height of the backrest after being stretched is lower, so that the head height of a user is lower when the seat device is used.
Specifically, the back mechanism 11 includes a back mount 111 for mounting the seat back and hinged to the side plate 14, and a back link 112, the back link 112 being hinged between the back mount 111 and the seat link 126. When the seat side plate 14 moves obliquely upward and forward, the backrest mount 111 moves with the side plate 14 and rotates rearward with the backrest link 112.
Specifically, support structure 12 includes a base 121, a first support 122, a second support 123, and a base linkage assembly 124; the first supporting member 122 and the second supporting member 123 are rotatably connected to both ends of the base 121, and the base linkage assembly 124 is rotatably connected to the side plate 14 and disposed between the first supporting member 122 and the second supporting member 123.
Specifically, the base linkage assembly 124 includes a middle connector 125, a seat linkage 126, and a bell crank 127; one end of the middle connecting piece 125 is connected with the crank piece 127, the other end of the middle connecting piece 125 is connected with the seat connecting piece 126, and the crank piece 127 is connected with the first supporting piece 122 and the side plate 14 respectively.
Specifically, the seat linkage 126 is provided with a support connection point 1261 for connection with the second support 123, a back connection point 1262 for connection with the back mechanism 11, and a linkage point 1263 for connection with the middle connector 125; the ratio of the distance of the linkage point 1263 to the support connection point 1261 to the distance of the linkage point 1263 to the back connection point 1262 is 0.65-0.95. In some embodiments, it may be 0.65, 0.75, 0.80, 0.83, 0.85, 0.90, or 0.95. Preferably, in this embodiment, the ratio of the distance of the linkage point 1263 to the support connection point 1261 to the distance of the linkage point 1263 to the back connection point 1262 is 0.84. When the extension device extends forwards, the side plate and the supporting structure of the linkage support rotate forwards along with the leg rest mechanism and incline upwards, the seat linkage 126 rotates along with the leg rest mechanism, the upward inclination angle of the side plate rotation is increased due to the ratio of the distance from the linkage point 1263 to the back connecting point 1262 to the distance from the linkage point 1263 to the supporting connecting point 1261, the backward rotation angle of the back mechanism is increased, the gravity center of the extension device is lowered, the lying position of the seat can achieve the zero gravity function, and the stability of the seat is not affected.
Specifically, the linkage bracket 10 further includes a linkage structure 13, where the linkage structure 13 includes a first linkage member 132, a second linkage member 133, and a third linkage member 134, the middle of the second linkage member 133 is rotationally connected with the side plate 14, one end of the second linkage member 133 is connected with one end of the first linkage member 132, the other end of the first linkage member 132 is connected with the first support member 122, the other end of the second linkage member 133 is connected with one end of the third linkage member 134, and the other end of the third linkage member 134 is connected with the leg rest mechanism; the linkage structure 13 is connected to the side plates 14 and is rotatably connected between the support structure 12 and the linkage assembly 30 for rotation with movement of the leg rest mechanism and the support structure.
Specifically, the leg rest connecting member 8 includes a first connecting member 81 and a second connecting member 82, one end of the first connecting member 81 is hinged to the middle portion of the second leg rest 7, the other end is hinged to one end of the second connecting member 82, the other end of the second connecting member 82 is hinged to the middle portion of the second connecting rod 2 at a second connecting point 22 near the first leg rest 5, and the middle portion of the second connecting member 82 is hinged to the middle portion of the fourth connecting rod 4. In this embodiment, the first connecting member 81 and the second connecting member 82 are used for connecting and supporting the second footrest 7, and the second footrest 7, the first connecting member 81, the second connecting member 82 and the fourth connecting rod 4 form a four-bar linkage mechanism which can be folded and extended, and are used for supporting and driving the second footrest 7 to extend.
Specifically, the link assembly 30 includes a first link 1, a second link 2, a third link 3, and a fourth link 4, the second link 2 is hinged with the first link 1, the fourth link 4 is hinged with the third link 3, the second link 2 is cross-connected with the third link 3, specifically, a first connection point 21 is provided at a middle portion of the second link 2, and the second link 2 is hinged with a middle portion of the third link 3 at the first connection point 21. The first link 1 and the third link 3 are rotatably connected to the link bracket 10.
Specifically, in this embodiment, the connections between linkage assembly 30, first leg rest 5, trace 6, second leg rest 7, and leg rest connector 8 are all pivotable connections or hinges, and the individual components may be pivotally connected by a combination of shafts, pins, rivets, bolts and nuts, or other fasteners that may enable pivotable connection.
Specifically, the middle part of the second foot rest 7 is provided with a first stopper 71, and when the first stopper 71 is engaged with the second connector 82, the second foot rest 7 is retracted to the limit position for preventing the loosening phenomenon of the foot rest. In this embodiment, the first limiting member 71 is used to limit the maximum retracted position of the second footrest, so as to avoid the loosening phenomenon caused by the second footrest not receiving the predetermined position. Simultaneously, the foot rest surface of the second foot rest and the foot rest surface of the first foot rest are kept in the vertical plane, and the attractiveness of the seat in the contracted state is improved.
Specifically, the end of the fourth link 4 near the second foot rest 7 is provided with a foot rest connection point 41, a linkage rod connection point 42 and a connector connection point 43 in sequence; the fourth link 4 is connected to the second leg rest 7 at the leg rest connection point 41, the link connection point 42 is provided between the leg rest connection point 41 and the link connection point 43, the fourth link 4 is connected to the link 6 at the link connection point 42, and the fourth link 4 is connected to the second link 82 at the link connection point 43.
Specifically, the first foothold 5 is provided with the second link connection point 51 and the linkage point 52, and the distance from the linkage point 52 to the linkage rod connection point 42 is greater than the distance from the linkage point 52 to the second link connection point 51. In this embodiment, the distance from the linkage rod connecting point 42 to the leg rest connecting point 41 is equal to the distance from the linkage rod connecting point 42 to the linkage point 52, and the distance from the linkage point 52 to the linkage rod connecting point 42 is greater than the distance from the linkage point 52 to the second connecting rod connecting point 51, so that the first leg rest 5 moves downwards relative to the linkage point 52 under the driving of the second connecting rod 2 when being stretched, the linkage rod 6 rotates relative to the fourth connecting rod arc, the leg rest surface of the first leg rest 5 smoothly rotates to the horizontal position with the leg rest facing upwards, and the first leg rest is more flexible and rapid to unfold.
Specifically, when the leg rest mechanism 20 is retracted to the limit position, the first leg rest 5 is located above the second leg rest 7, and the foot rest surface of the first leg rest 5 is in the same vertical plane as the foot rest surface of the second leg rest 7. When the leg rest mechanism 20 is extended from the contracted position to the extreme position, the leg rest surfaces of the first leg rest 5 and the second leg rest 7 are rotated upward, and the first leg rest 5 and the second leg rest 7 are spaced apart from each other.
Specifically, when the footrest mechanism 20 is extended to the limit position, the distance L separating the first foot rest 5 from the second foot rest 7 is not less than 140mm. Preferably, it may be 145mm, 147mm, 150mm or 155mm, in this embodiment 147mm. The first foot rest of this embodiment splits from the second foot rest, increasing the separation distance between the first foot rest and the second foot rest after extension.
The first foot rest of the foot rest mechanism is hinged with the fourth connecting rod through the linkage rod, so that the first foot rest and the second foot rest can be more flexibly closed and separated, and when the foot rest is contracted, the two foot rests are retracted and closed, so that the occupied space is reduced; when stretching, the stretching length of the foot rest mechanism is increased, the legs and feet can be better supported, the comfort of the seat is improved, and the use requirements of users with different heights are met.
Specifically, the footrest mechanism is for being connected with the footrest assembly 9, the footrest assembly 9 comprising a first footrest 91 and a second footrest 92, the first footrest 91 being connected with the first footrest 5, the second footrest 92 being connected with the second footrest 7. Specifically, be provided with the foot rest face of inwards buckling on first foot rest and the second foot rest respectively, the foot rest face be used for with footrest fixed connection, first foot rest and second foot rest are fixed respectively on its corresponding foot rest face promptly.
Specifically, the stretching device of the seat in this embodiment is two sets of support structures that are spaced and symmetrically arranged, a driving device is arranged between the two sets of stretching devices, and the driving device drives the stretching device to stretch or shrink through a transmission structure 15, wherein the transmission structure 15 comprises a first transmission piece 151 and a second transmission piece 152 that are connected, the first transmission piece is used for being connected with the driving device, and the second transmission piece is connected with the leg rest mechanism. In some embodiments, the drive may be a manual zipper drive; in other embodiments, the drive may be an electric drive, which may be a push rod motor or a slider motor drive.
In this embodiment, the leg rest mechanism extends forwardly from the retracted position while bringing the linkage mount 10 forward, with the first leg rest 5 and the second leg rest 7 fully separated and the leg rest facing upwardly in the extended position. In the process that the foot rest mechanism stretches from the contraction position to the limit position, the second connecting rod 2 drives the first foot rest 5 to turn upwards, the linkage rod 6 rotates along with the first foot rest 5, the first foot rest 5 is supported while the first foot rest 5 rotates more flexibly, and the fourth connecting rod 4 drives the second foot rest 7 and the foot rest connecting piece 8 to extend forwards and rotate upwards until the second foot rest 7 stretches to the limit position. During retraction of the leg rest mechanism from the extended position to the extreme position, the direction of movement of the components of the leg rest mechanism is opposite to that during extension.
In this embodiment, the footrest mechanism and the back mechanism can be continuously adjusted, when only the footrest mechanism is extended, the corresponding seat is at a rest position, when the footrest mechanism is lifted and the back mechanism is reclined and both extend to the limit position, the difference in height between the highest point of the first footrest and the highest point of the back mechanism in the vertical direction is the largest, corresponding to the zero gravity lying position of the seat, and when the footrest mechanism and the back mechanism are retracted to the limit position, corresponding to the sitting position of the seat.
The seat support of this embodiment through the structure of adjustment bracket mechanism, makes the flexible of bracket mechanism more nimble, extends length increase, support shank and foot that can be better. Through the size proportional relation of part structure and part in the adjustment seat extension device for the inclination of seat when lying the position increases, and back focus reduces, and stability increases, combines the extension height of bracket mechanism and the separation distance between the bracket to increase, realizes the zero gravity gesture of seat.
The seat stretching devices are arranged in two groups, and the two groups of stretching devices are arranged at intervals and are symmetrically. The seat stretching device is provided with a seat frame, and the seat stretching device is packaged into a finished sofa.
The foregoing description has fully disclosed specific embodiments of this invention. It should be noted that any modifications to the specific embodiments of the invention may be made by those skilled in the art without departing from the scope of the invention as defined in the appended claims. Accordingly, the scope of the claims of the present invention is not limited to the foregoing detailed description.

Claims (13)

1. A seat extension device capable of providing a zero gravity posture, characterized by comprising a linkage bracket (10), a back mechanism (11) and a foot rest mechanism (20), wherein the linkage bracket (10) is rotatably connected between the foot rest mechanism (20) and the back mechanism (11);
The foot rest mechanism (20) comprises a connecting rod assembly (30), a first foot rest (5), a linkage rod (6), a second foot rest (7) and a foot rest connecting piece (8), wherein the connecting rod assembly (30) is used for being rotationally connected with the linkage bracket (10); the first foot rest (5) is hinged with a second connecting rod (2) of the connecting rod assembly (30), the second foot rest (7) is hinged with a fourth connecting rod (4) of the connecting rod assembly (30), one end of the linkage rod (6) is hinged with the first foot rest (5), the other end of the linkage rod (6) is hinged with the fourth connecting rod (4), and the foot rest connecting piece (8) is rotatably connected between the second connecting rod (2), the fourth connecting rod (4) and the second foot rest (7);
when the seat stretching device is in a zero gravity posture, the height difference H between the highest point of the second foot rest (7) and the highest point of the back mechanism (11) in the vertical direction is 310mm-450mm;
The foot rest connecting piece (8) comprises a first connecting piece (81) and a second connecting piece (82), one end of the first connecting piece (81) is hinged with the middle part of the second foot rest (7), the other end of the first connecting piece is hinged with one end of the second connecting piece (82), the other end of the second connecting piece (82) is hinged with the middle part of the second connecting rod (2), and the middle part of the second connecting piece (82) is hinged with the middle part of the fourth connecting rod (4);
When the leg rest mechanism (20) is extended to an extreme position, the distance L between the first leg rest (5) and the second leg rest (7) is not less than 140mm.
2. A seat extension device capable of providing a zero gravity posture according to claim 1, characterized in that the link assembly (30) comprises a first link (1), a second link (2), a third link (3) and a fourth link (4), the second link (2) being hinged to the first link (1), the fourth link (4) being hinged to the third link (3), the first link (1) and the third link (3) being rotatably connected to the linkage mount (10).
3. A seat extension device capable of providing a zero gravity posture according to claim 1, characterized in that the middle part of the second foot rest (7) is provided with a first limiting member (71), and when the first limiting member (71) is matched and abutted against the second connecting member (82), the second foot rest (7) is contracted to a limit position for preventing the loosening phenomenon of the foot rest.
4. A seat extension device capable of providing a zero gravity posture according to claim 1, characterized in that a leg rest connection point (41), a linkage rod connection point (42) and a connecting piece connection point (43) are sequentially arranged at one end of the fourth connecting rod (4) close to the second leg rest (7);
The fourth connecting rod (4) is connected with the second foot rest (7) at the foot rest connecting point (41), the fourth connecting rod (4) is connected with the linkage rod (6) at the linkage rod connecting point (42), the fourth connecting rod (4) is connected with the second connecting piece (82) at the connecting piece connecting point (43), and the linkage rod connecting point (42) is arranged between the foot rest connecting point (41) and the connecting piece connecting point (43).
5. A seat extension device providing a zero gravity position according to claim 4, characterized in that the first leg rest (5) is provided with a second link connection point (51) and a linkage point (52), the distance of the linkage point (52) to the linkage rod connection point (42) being greater than the distance of the linkage point (52) to the second link connection point (51).
6.A seat extension device capable of providing a zero gravity posture according to claim 1, characterized in that the leg rest surfaces of the first leg rest (5) and the second leg rest (7) are turned upwards and the first leg rest (5) and the second leg rest (7) are spaced apart from each other when the leg rest mechanism (20) is extended from a retracted position to an extreme position.
7. A seat support, characterized by comprising a linkage support (10), a back mechanism (11) and a leg rest mechanism (20), wherein the linkage support (10) is rotatably connected between the leg rest mechanism (20) and the back mechanism (11);
The foot rest mechanism (20) comprises a connecting rod assembly (30), a first foot rest (5), a linkage rod (6), a second foot rest (7) and a foot rest connecting piece (8), wherein the connecting rod assembly (30) is used for being rotationally connected with the linkage bracket (10); the first foot rest (5) is hinged with a second connecting rod (2) of the connecting rod assembly (30), the second foot rest (7) is hinged with a fourth connecting rod (4) of the connecting rod assembly (30), one end of the linkage rod (6) is hinged with the first foot rest (5), the other end of the linkage rod (6) is hinged with the fourth connecting rod (4), and the foot rest connecting piece (8) is rotatably connected between the second connecting rod (2), the fourth connecting rod (4) and the second foot rest (7);
The linkage support (10) comprises a supporting structure (12) and side plates (14), wherein a seat frame installation surface (141) for installing a seat frame is arranged on the side plates (14), when the seat stretching device is in a zero gravity posture, an included angle alpha between the seat frame installation surface (141) and a horizontal plane is not smaller than 18 degrees, and an included angle beta between the back mechanism (11) and the horizontal plane is not larger than 20 degrees;
when the seat stretching device is in a zero gravity posture, the height difference H between the highest point of the second foot rest (7) and the highest point of the back mechanism (11) in the vertical direction is 310mm-450mm;
The foot rest connecting piece (8) comprises a first connecting piece (81) and a second connecting piece (82), one end of the first connecting piece (81) is hinged with the middle part of the second foot rest (7), the other end of the first connecting piece is hinged with one end of the second connecting piece (82), the other end of the second connecting piece (82) is hinged with the middle part of the second connecting rod (2), and the middle part of the second connecting piece (82) is hinged with the middle part of the fourth connecting rod (4);
When the leg rest mechanism (20) is extended to an extreme position, the distance L between the first leg rest (5) and the second leg rest (7) is not less than 140mm.
8. A seat support according to claim 7, wherein the angle α between the seat frame mounting surface (141) and the horizontal plane is 23 ° and the corresponding angle β between the back mechanism (11) and the horizontal plane is 14 ° when the seat extension device is in the zero gravity position.
9. A seat support according to claim 7, wherein the angle α between the seat frame mounting surface (141) and the horizontal is 27 ° -32 ° when the seat extension device is in a zero gravity position.
10. A seat support according to claim 7, wherein the support structure (12) comprises a base (121), a first support (122), a second support (123) and a base linkage assembly (124);
the first supporting piece (122) and the second supporting piece (123) are rotatably connected to two ends of the base (121), and the base linkage assembly (124) is rotatably connected to the side plate (14) and is arranged between the first supporting piece (122) and the second supporting piece (123).
11. The seat support according to claim 7, wherein the base linkage assembly (124) comprises a middle connector (125), a seat linkage (126) and a bell crank (127);
One end of the middle connecting piece (125) is connected with the crank piece (127), the other end of the middle connecting piece (125) is connected with the seat connecting piece (126), and the crank piece (127) is respectively connected with the first supporting piece (122) and the side plate (14).
12. A seat support according to claim 11, characterized in that the seat linkage (126) is provided with a support connection point (1261) for connection with a second support (123), a back connection point (1262) for connection with the back mechanism (11) and a linkage point (1263) for connection with the middle connection (125);
The ratio of the distance of the linkage point (1263) to the support connection point (1261) to the distance of the linkage point (1263) to the back connection point (1262) is 0.65-0.95.
13. A seat support according to claim 12, wherein the back mechanism (11) comprises a back mount (111) and a back linkage (112), the back mount (111) being for mounting a seat back and being hinged to the side plate (14), the back linkage (112) being hinged between the back mount (111) and the seat linkage (126).
CN202111256078.6A 2021-10-27 2021-10-27 Seat stretching device capable of providing zero gravity posture and seat support Active CN113907551B (en)

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CN202111256078.6A CN113907551B (en) 2021-10-27 2021-10-27 Seat stretching device capable of providing zero gravity posture and seat support
PCT/CN2022/125374 WO2023071831A1 (en) 2021-10-27 2022-10-14 Mechanical stretching device for movable seat unit, seat bracket, and seat unit

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CN113892772A (en) * 2021-10-27 2022-01-07 锐迈机械科技(吴江)有限公司 Mechanical stretching device for a movable seat unit and seat unit
WO2023071831A1 (en) * 2021-10-27 2023-05-04 锐迈科技股份有限公司 Mechanical stretching device for movable seat unit, seat bracket, and seat unit
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CN114869090A (en) * 2022-05-06 2022-08-09 东莞市瑞豪家具制造有限公司 Structure improved chair frame
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