WO2021248703A1 - 机械伸展单元及电动机械伸展装置 - Google Patents

机械伸展单元及电动机械伸展装置 Download PDF

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Publication number
WO2021248703A1
WO2021248703A1 PCT/CN2020/112281 CN2020112281W WO2021248703A1 WO 2021248703 A1 WO2021248703 A1 WO 2021248703A1 CN 2020112281 W CN2020112281 W CN 2020112281W WO 2021248703 A1 WO2021248703 A1 WO 2021248703A1
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WO
WIPO (PCT)
Prior art keywords
link
backrest
mounting plate
hinged
assembly
Prior art date
Application number
PCT/CN2020/112281
Other languages
English (en)
French (fr)
Inventor
陈永春
施振杰
李文才
李立波
Original Assignee
永艺家具股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202010531243.3A external-priority patent/CN111685520B/zh
Priority claimed from CN202010531947.0A external-priority patent/CN111839052B/zh
Application filed by 永艺家具股份有限公司 filed Critical 永艺家具股份有限公司
Publication of WO2021248703A1 publication Critical patent/WO2021248703A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/034—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest
    • A47C1/035—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest
    • A47C1/0355—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest actuated by linkages, e.g. lazy-tongs mechanisms
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C17/00—Sofas; Couches; Beds

Definitions

  • the present invention relates to the field of sports decoration furniture used to support the user's body in a substantially sitting position, and more specifically, to a mechanical extension unit and an electromechanical extension device.
  • reclining seat units that allow the user to extend the footrest or ottoman forward and recline the backrest relative to the seat.
  • These existing seat units usually provide three basic positions: the standard non-reclining folded position, the extended position, and the reclining position. In the collapsed position, the bottom is in a generally horizontal orientation and the backrest is set to be substantially upright.
  • the seating unit includes a bench to which a mechanical device is attached, the mechanical device is folded so that the bench is not stretched.
  • the stool In the extended position commonly referred to as the television (“TV”) position, the stool extends toward the front of the seat, and at the same time the backrest and cushion are rotated backward by an angle of about 4 degrees to ensure that the occupants of the seat unit can watch comfortably Television; in the reclining position, the backrest is positioned backwards from the extended position into an obtuse angle relationship with the seat for rest or sleep.
  • TV television
  • the above-mentioned seat unit can only be stretched, lifted and closed forcibly by the long sliding groove; thus, the stretching device is functionally unable to make the product's movement trajectory smooth. Due to the space gap of the sliding groove, the user is in trouble. When leaning on the backrest, there will be a state of jumping or displacement, which greatly reduces the user's experience.
  • the plate where the sliding groove is located moves up or down relatively to drive the component used for cushion support to rotate. Because the trajectory of the coordinated movement of the sliding groove and the component is not smooth enough, it is used during the rotation of the component supporting the cushion , There will also be problems with runout or displacement.
  • the purpose of the present invention is to provide a mechanical extension unit that drives the footrest assembly and the backrest assembly through two sets of linkage mechanisms.
  • the lever operation has an excellent sense of experience, which more satisfies people's needs for comfortable use.
  • the present invention adopts the following technical solutions:
  • a mechanical extension unit comprising: a footrest assembly, a cushion support assembly and a backrest assembly
  • the cushion support assembly includes a seat mounting plate, one side of the seat mounting plate is provided with a parallel to the seat mounting plate
  • a first transverse link is rotatably connected to the first stool collapse link in the footstool assembly, the tail end of the first stool collapse link in the footstool assembly and the second stool
  • the rear end of the collapse link is hinged with the seat mounting plate, the rear end of the first transverse link is hinged with a rear longitudinal link, and the rear longitudinal link is connected to the seat mounting plate through the rear support link Hinged, the seat mounting plate, the first stool collapse link, the second stool collapse link, the first transverse link, the rear longitudinal link and the rear support link constitute a footrest link mechanism for driving the feet
  • the stool assembly moves relative to the seat mounting plate between the retracted position and the extended position;
  • the backrest assembly includes a backrest, a second transverse link, the second transverse link is arranged parallel to one side
  • the middle of the seat mounting plate is hinged with a first rotating member
  • the middle of the bottom link is hinged with a second rotating member
  • the first rotating member and the second rotating member are rotatable Connection; when the first rotating member rotates relative to the second rotating member, the first rotating member drives the seat mounting plate away from or close to the bottom link, which in turn causes the backrest drive link mechanism to drive the backrest assembly in the closed position And move between the reclined position.
  • the first rotating member located between the seat mounting plate and the base rotates relative to the second rotating member to drive the seat mounting plate away from or close to the base to realize the lifting of the seat mounting plate.
  • the first rotating member and the second rotating member also constitute the seat mounting plate
  • the middle part of the support enhances the bearing capacity of the seat mounting plate and improves the stability of the structure.
  • the front longitudinal connecting rod includes a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are arranged to form a V-shaped structure, and the bottom connecting rod is connected to the front
  • the longitudinal link is hinged at the intersection of the first link plate and the second link plate, the first link plate is hinged with the second transverse link, the second link plate is hinged with the front support, and The first connecting plate is always parallel to the first rotating member.
  • the front longitudinal link is provided with a card slot at the intersection of the first connecting plate and the second connecting plate, the front support member is provided with a limiting member, and the backrest member is in a closed position At this time, the limiting member abuts against the inner wall of the slot. Prevent the backrest from rotating excessively beyond the preset point of the folded position.
  • the backrest assembly further includes a third transverse connecting rod and a crank connecting member, the tail end of the third transverse connecting rod and the rear end of the backrest member are hinged to each other, and the third transverse connecting rod
  • the middle part of the rod is hinged to the tail end of the second transverse connecting rod
  • the crank connecting piece includes a third connecting plate and a fourth connecting plate, and the third connecting plate and the fourth connecting plate are intersected to form a V-shaped structure
  • the third connecting plate is hinged to the head end of the third transverse connecting rod
  • the bottom connecting rod is connected to the crank connector at the intersection of the third connecting plate and the fourth connecting plate
  • the fourth connecting plate is connected to the crank connector.
  • the rear support member is hinged, and the third connecting plate is always parallel to the first rotating member.
  • a second protrusion is provided on the third transverse link, and when the backrest is in the reclining position, the second protrusion abuts against the side wall of the rear support link.
  • the second protrusion and the side wall of the rear support connecting rod form a limit to prevent the backrest member from falling backward continuously.
  • the present invention also proposes an electromechanical extension device, including a base on which the mechanical extension unit described in the above solution is arranged in mirror symmetry, and a driving mechanism is provided between the two mechanical extension units;
  • the driving mechanism It includes a linear driver, a front motor tube, and a rear motor tube.
  • the linear driver is connected to the front motor tube and the rear motor tube respectively to drive the front motor tube and the rear motor tube for feeding motion;
  • the front motor tube The two ends of the rear motor tube are respectively connected with the footrest components in the two mechanical extension units to drive the footrest components to move between the folded position and the extended position;
  • the driving link mechanism is connected to drive the backrest.
  • the driving link mechanism drives the backrest assembly to move between the folded position and the reclining position, and drives the seat mounting plate to move away from or close to the bottom link.
  • the two ends of the front motor tube are respectively connected with the second stool collapse link in the two footrest assemblies to drive the footrest link mechanism to operate.
  • both ends of the rear motor tube are respectively connected to the first rotating member in the two mechanical extension units, and the first rotating member rotates with the rear motor tube relative to the second rotating member
  • the front support member drives the front longitudinal link to rotate
  • the rear support member drives the rear longitudinal link
  • the rotation of the connecting rod triggers the backrest driving link mechanism to drive the backrest assembly to move between the folded position and the reclining position.
  • the footrest assembly is driven by a plurality of connecting rods forming a connecting rod assembly. Its movement is stable, the stretching process is continuous and there is no slight bounce perception, and it has an excellent sense of experience, which more satisfies people's needs for comfortable use.
  • the seat mounting plate is driven up or down by the second link, which overcomes the transmission mode of the chute jacking frame commonly used in the market. Its movement is stable, the stretching process is continuous and there is no trace of beating perception, and it has an excellent experience Sensation, and more satisfy people’s needs for comfortable use.
  • the first transverse link drives the footrest assembly relative to the seat mounting plate to move between the folded position and the extended position; the second link mechanism drives the backrest assembly between the folded position and the reclining position move.
  • the footrest assembly and the backrest assembly are respectively driven by two linkage mechanisms, and the structure operation is more stable.
  • the first transverse link is located on one side of the seat mounting plate, and the second transverse link is located on one side of the first transverse link, so that the seat mounting plate, the first transverse link and the second transverse link are located
  • the height is almost the same, which greatly reduces the longitudinal height of the mechanical extension unit, facilitating subsequent assembly.
  • the front support and the rear support not only realize the movement of the driving backrest, but the front support and the rear support also support the seat mounting plate, which improves the stability of the structure .
  • Figure 1 is a schematic diagram of the structure of the electromechanical stretching device
  • Figure 2 is a schematic structural diagram of the mechanical extension unit when the footrest assembly is in the folded position and the backrest assembly is in the folded position;
  • Figure 3 is a schematic structural diagram of the mechanical extension unit when the footrest assembly is in the extended position and the backrest assembly is in the reclining position;
  • Figure 4 is a schematic structural view of the footstool assembly and the footstool linkage mechanism when the footstool assembly is in the retracted position;
  • Figure 5 is a schematic diagram of the structure of the footstool assembly and the footstool linkage mechanism when the footstool assembly is in an extended position;
  • Figure 6 is a schematic structural view of the backrest assembly and the backrest driving link mechanism when the backrest assembly is in the folded position;
  • Figure 7 is a schematic structural view of the backrest assembly and the backrest driving link mechanism when the backrest assembly is in a reclining position
  • Figure 8 is a schematic view of the structure of the front longitudinal link
  • Figure 9 is a schematic diagram of the structure of the crank connector
  • Figure 10 is a schematic diagram of the structure of a curved connecting rod
  • Figure 11 is a schematic diagram of the structure of the backrest
  • Figure 12 is a schematic diagram of the three-dimensional structure of the mechanical extension unit when the footrest assembly is in the folded position and the backrest assembly is in the folded position;
  • Figure 13 is a schematic diagram of the three-dimensional structure of the mechanical extension unit when the footrest assembly is in the extended position and the backrest assembly is in the folded position;
  • Fig. 14 is a three-dimensional schematic diagram and a partial enlarged view of the mechanical extension unit when the footrest assembly is in the extended position and the backrest assembly is in the reclining position;
  • Figure 15 is a front view of the mechanical extension unit when the footrest assembly is in the folded position and the backrest assembly is in the folded position;
  • Figure 16 is a front view of the mechanical extension unit when the footrest assembly is in the extended position and the backrest assembly is in the reclining position.
  • this embodiment proposes a mechanical extension device, which includes a base 1 and two mechanical extension units 2, and the two mechanical extension units 2 are arranged mirror-symmetrically on the base 1.
  • each mechanical extension unit 2 includes a footrest assembly 3, a cushion support assembly 4, and a backrest assembly 5.
  • the footrest assembly 3 includes a footrest 31, and a third stool collapse link 34 and a fourth stool collapse link 35 are connected to the footrest 31, and the third stool collapse link 34 and the fourth stool collapse link 35 are connected to the footrest 31.
  • the third stool collapse link 34 is hinged with a first stool collapse link 32
  • the fourth stool collapse link 35 is hinged with a second stool collapse link 33
  • the collapse links 33 are parallel, and the second stool collapse link 33 and the third stool collapse link 34 cross each other and are hinged at the intersection.
  • the cushion support assembly 4 includes a seat mounting plate 41, and one side of the seat mounting plate 41 is provided with a first transverse link 6 parallel to the seat mounting plate 41.
  • the head end of the first transverse link 6 is rotatably connected to the first stool collapse link 32, the tail end of the first stool collapse link 32 (that is, the end away from the footrest 31), and the second stool collapse link 33
  • the tail ends of each are hinged to the seat mounting plate 41.
  • the crank connecting member 54 includes a third connecting plate 541 and a fourth connecting plate 542, and the third connecting plate 541 and the fourth connecting plate 542 are intersected to form a V-shaped structure.
  • the fourth connecting plate 542 is hinged with a rear support link 8.
  • the crank connecting member 54 is connected to the seat mounting plate 41 through the rear support link 8.
  • the rear end of the rear support link 8 (that is, the end away from the backrest 51) is hinged to the fourth connecting plate 542 on the crank connecting member 54, and the head end of the rear support link 8 is fixed to the seat mounting plate 41 connect.
  • the rear longitudinal link 7 and the crank connecting member 54 are hinged at the intersection of the third connecting plate 541 and the fourth connecting plate 542.
  • the first stool collapse connecting rod 32 and the second stool collapse connecting rod 33 constitute a stool collapse connecting rod group, which is connected by the seat mounting plate 41, the stool collapse connecting rod group, the first horizontal connecting rod 6, the rear longitudinal connecting rod 7, and the crank
  • the member 54 and the rear support link 8 constitute a substantially quadrilateral self-locking closed loop footrest link mechanism for driving the footrest assembly 3 relative to the seat mounting plate 41 to move between the retracted position and the extended position.
  • the first transverse link 6 pushes the first stool collapse link 32 to rotate, and the first The stool collapse link 32 drives the third stool collapse link 34 to lift the footrest 31, and then drives the fourth stool collapse link 35 and the second stool collapse link 33 to rotate until the footrest 31 is in the extended position.
  • a connecting rod assembly is formed by a plurality of connecting rods to realize the driving, and the movement is stable, the stretching process is continuous and there is no slight bounce perception, and it has an excellent sense of experience and improves the comfort of the product.
  • the backrest assembly 5 includes a backrest 51, a second transverse link 52 and a third transverse link 53.
  • the backrest 51 is an L-shaped connecting rod, and the two sides of the bending part are the backrest insertion section 511 and the connection section 512 respectively.
  • the backrest insertion section 511 is used to insert the backrest.
  • the connecting section 512 is hinged with the third transverse link 53 and the backrest 51 is hinged with the seat mounting plate 41 at the bending position.
  • the second horizontal link 52 is arranged parallel to one side of the first horizontal link 6, and the third horizontal link 53 is hinged to the tail end of the second horizontal link 52.
  • the front end of the second transverse link 52 (that is, one end of the footrest 31) is also hinged with a front longitudinal link 9, the middle of the front longitudinal link 9 is hinged with a bottom link 11 fixedly connected to the base 1, and the bottom is connected
  • the rod 11 is hinged to the rear end of the rear longitudinal link 7, and the third connecting plate 541 of the crank connecting member 54 is hinged to the third transverse link 53.
  • the fourth connecting plate 542 of the crank connecting member 54 is also hinged with a rear support connecting rod 8, and the crank connecting member 54 is connected to the seat mounting plate 41 through the rear support connecting rod 8.
  • the rear end of the rear support link 8 is hinged with the crank connector 54, and the head end of the rear support link 8 is fixedly connected with the seat mounting plate 41.
  • the middle part of the rear longitudinal link 7 and the crank connecting member 54 are hinged at the intersection of the third connecting plate 541 and the fourth connecting plate 542.
  • the third transverse link 53, the second transverse link 52, the front longitudinal link 9, the bottom link 11, the rear longitudinal link 7, and the crank connecting member 54 constitute a backrest drive link mechanism to drive the backrest assembly 5 to retract. Move between closed position and reclining position.
  • the backrest driving link mechanism When the backrest driving link mechanism operates (that is, when the backrest assembly 5 moves to the backward position), the longitudinal distance between the second transverse link 52 and the bottom link 11 increases. As shown in FIG. 7, the second transverse link 52 moves toward Moving away from the backrest 51, the third transverse link 53 is pulled to drive the backrest 51 to flip relative to the seat mounting plate 41 until the backrest 51 is in the backward position. And in this solution, a front support 10 is provided on the tail end of the front longitudinal link 9.
  • the front longitudinal link 9 includes a first connecting plate 91 and a second connecting plate 92, and the first connecting plate 91 and the second connecting plate 92 are intersected to form a V-shaped structure. .
  • the bottom connecting rod 11 and the front longitudinal connecting rod 9 are hinged at the intersection of the first connecting plate 91 and the second connecting plate 92, the first connecting plate 91 is hinged to the second transverse connecting rod 52, and the second connecting plate 92 is hinged to the front
  • the support 10 is hinged.
  • the front support 10 is fixedly connected to the seat mounting plate 41. When the backrest driving link mechanism is operating, the longitudinal distance between the second horizontal link 52 and the bottom link 11 increases. During this process, the front longitudinal link 9 is turned over.
  • the front longitudinal link 9 Since the front longitudinal link 9 is hingedly connected to the bottom link 11 at the intersection of the first link plate 91 and the second link plate 92, the second link plate 92 of the front longitudinal link 9 is hinged to the front support 10, and is connected in the front longitudinal direction. When the rod 9 is turned over, the front longitudinal link 9 lifts up the front support 10 and then raises the height of the seat mounting plate 41 to achieve the purpose of driving the seat mounting plate 41 to rise. Moreover, the front longitudinal link 9 has a V-shaped structure, which shortens the distance between the second horizontal link 52 and the bottom link 11 compared with a linear link, thereby saving installation space.
  • the front longitudinal link 9 is provided with a slot 93 at the intersection of the first connecting plate 91 and the second connecting plate 92, the front support 10 is inclined upwardly with a support extension section toward the footrest assembly 3, and the support A limiting member 101 is provided on the extension section.
  • the limiting member 101 is a columnar limiting block.
  • the columnar limit block is a shaft head that penetrates the limit shaft of the front support.
  • a stroke limit is formed for the front longitudinal link 9 to prevent the front longitudinal link 9 from rotating beyond the stroke, thereby preventing the backrest 51 from excessively rotating beyond the preset point of the folded position.
  • the stop of the backrest drive linkage mechanism also forms a stroke limit on the seat mounting plate 41, so that the seat mounting plate 41 can be lowered to the designated position.
  • the backrest driving link mechanism operates to reduce the longitudinal distance between the second transverse link 52 and the bottom link 11 (that is, when the backrest assembly 5 moves to the folded position)
  • the second transverse link 52 moves toward the backrest 51 Move and push the third transverse link 53 to drive the backrest 51 to flip relative to the seat mounting plate 41 until the backrest 51 is in the folded position.
  • the front longitudinal link 9 is turned over, and the front longitudinal link 9 drives the front support 10 to descend, thereby reducing the height of the seat mounting plate 41, achieving the purpose of driving the seat mounting plate 41 to descend.
  • a second protrusion 531 is provided on the third transverse link 53.
  • the second protrusion 531 is a shaft head that penetrates the limiting shaft of the third transverse link 53.
  • the second protrusion 531 abuts against the side wall of the rear support link 8.
  • the second protrusion 531 abuts against the side wall of the rear support link 8 to form a limit, which prevents the backrest 51 from falling backward continuously.
  • the stop of the backrest driving link mechanism also forms a stroke limit on the seat mounting plate, so that the seat mounting plate can be lifted to a designated position.
  • the seat mounting plate 41 is driven up or down by the backrest drive linkage mechanism, which overcomes the transmission mode of the chute jacking frame commonly used in the market. Its movement is stable, the stretching process is continuous and there is no slight bounce perception, and it has an excellent experience Sensation, and more satisfy people’s needs for comfortable use.
  • the footrest assembly 3 and the backrest assembly 5 are respectively driven by two linkage mechanisms, and the structure operation is more stable, which improves the user's comfort when using the product.
  • the seat mounting plate 41, the first transverse link 6, and the second transverse link 52 are parallel to each other, and will not interfere with each other during operation, so as to ensure the smooth operation of the mechanism. Moreover, the heights of the seat mounting plate 41, the first transverse link 6, and the second transverse link 52 are almost the same, which greatly reduces the longitudinal height of the mechanical extension unit 2 and facilitates subsequent assembly of the mechanical extension device.
  • the mechanical extension unit 2 is also provided with a drive mechanism 13 for driving the footrest linkage mechanism and the backrest drive linkage mechanism to operate.
  • the driving mechanism 13 includes a linear driver 131, a front motor tube 132 and a rear motor tube 133.
  • the linear driver 131 is respectively connected to the front motor tube 132 and the rear motor tube 133 to drive the front motor tube 132 and the rear motor tube 133 to perform a feeding motion in sequence.
  • the linear driver 131 is a horizontal push motor
  • the front motor tube 132 is connected to the front end of the drive rail 135 on the horizontal push motor
  • both ends of the front motor tube 132 are connected to the feet in the two mechanical extension units.
  • the stool assembly 3 is connected. More specifically, the two ends of the front motor tube 131 are respectively connected to the two second stool collapse links 33.
  • the process of the front motor tube 131 driving the footstool assembly 3 to extend and its limit relationship can be referred to the "Mechanical Extension Device and Seat" with the application number "201521033364.6".
  • the front motor tube 131 drives the second stool collapse link 33 to extend forward, thereby driving the third stool collapse link 34 to cooperate with the first stool collapse link 32 and the fourth stool collapse link 35 to extend forward to lift the footrest 31 to Stretched position.
  • the limiting member on the second stool collapse link 33 abuts against the side wall of the third stool collapse link 34 to form a stroke limit.
  • the bottom link 11 is located below the seat mounting plate 41 and is substantially parallel to the seat mounting plate 41. And the middle of the seat mounting plate 41 is hinged with a first rotating part 14, the middle of the bottom link 11 is hinged with a second rotating part 15, the first rotating part 14 and the second rotating part 15 are rotatably connected.
  • the two ends of the rear motor tube 133 are respectively connected with the first rotating members 14 in the two mechanical extension units 2. In order to prevent the first rotating member 14 from interfering with the first transverse link 6, the second transverse link 52 and the bottom link 11 during the rotation, in this solution, as shown in FIG.
  • the first rotating member 14 includes The first rotating plate 141, the second rotating plate 142, the third rotating plate 143 and the fourth rotating plate 144, and the first rotating plate 141, the second rotating plate 142, the third rotating plate 143 and the fourth rotating plate 144 are along the first The length directions of a rotating member 14 are arranged in an orderly crosswise manner, so that the first rotating member 14 has a W-shaped structure.
  • the first rotating plate 141 is hinged to the seat mounting plate 41, and the first horizontal link 6 and the second horizontal link 52 are located between the first rotating plate 141 and the second rotating plate 142.
  • the second rotating member 15 is hinged to the third rotating plate 143, and the fourth rotating plate 144 is connected to the rear motor tube 133.
  • a sliding block 134 is connected to the rear motor tube 133, and a sliding groove 136 is provided on the sliding block 134.
  • the sliding block 134 is slidably arranged on the driving rail 135 connected to the horizontal thrust motor through the sliding groove 136.
  • the sum of the longitudinal lengths of the first rotating member 14 and the second rotating member 15 increases, so that the seat mounting plate 41 is away from the bottom connecting rod 11. Since the first rotating member 14 is located in the middle of the seat mounting plate 41, and the second rotating member 15 is located in the middle of the bottom link 11, the first rotating member 14 and the second rotating member 15 also constitute the middle support of the seat mounting plate 41 Enhance the bearing capacity of the seat mounting plate 41 and improve the stability of the structure. And in this process, the backrest drive linkage mechanism operates (that is, when the backrest assembly 5 moves to the backward position), the longitudinal distance between the second transverse link 52 and the bottom link 11 increases, as shown in FIG. 7, the second The transverse link 52 moves in a direction away from the backrest 51, and the third transverse link 53 is pulled to drive the backrest 51 to flip relative to the seat mounting plate 41 until the backrest 51 is in the backward position.
  • the backrest drive linkage mechanism drives the front support 10 and the rear support 8 to rise and fall to drive the seat mounting plate 41 to rise or fall and drive the backrest 51 to rotate, It overcomes the transmission mode of the chute jacking frame commonly used in the market, its movement is stable, the stretching process is continuous and there is no slight bounce perception, it has an excellent sense of experience, and more satisfies people's needs for comfortable use.
  • a front support 10 is provided on the tail end of the front longitudinal connecting rod 9, and a rear support 8 is provided on the tail end of the crank connecting member 54.
  • the front longitudinal link 9 and the crank connecting member 54 rotate, and the sum of the longitudinal lengths of the front longitudinal link 9 and the front support member 10 increases.
  • the sum of the longitudinal lengths of the crank connecting member 54 and the rear support 8 is increased, and the bottom connecting rod 11 and the seat mounting plate 41 are supported at the head and tail ends of the bottom connecting rod 11 and the seat mounting plate 41, so that the seat The mounting plate 41 is far away from the bottom link 11.
  • the seat mounting plate 41 is far away from the bottom link 11 to complete the ascending action of the seat mounting plate 41.
  • the front support 10 and the rear support 8 not only realize the movement of the driving backrest, but the front support 10 and the rear support 8 also support the seat mounting plate, which improves the stability of the structure.
  • the first connecting plate 91 of the front longitudinal link 9 and the third connecting plate 541 of the crank connecting member 54 are both arranged in parallel with respect to the first rotating member 14. 15 and 16, in the process of rotation, the first connecting plate 91 of the front longitudinal link 9 and the third connecting plate 541 of the crank connecting member 54 are always kept parallel to the first rotating member 14, so that the three components The angle of rotation is always the same. Furthermore, the relative lifting height of the front support 10 and the rear support 8 is made the same as the lifting height of the first rotating part 14 relative to the second rotating part 15, so that the seat mounting plate 41 moves up and down in parallel as a whole.
  • the seat mounting plate 41 will not have a large change in concave and convex as a whole, which improves the comfort of the occupant.
  • the front longitudinal connecting rod 9 and the crank connecting member 54 have a V-shaped structure, which shortens the distance between the second transverse connecting rod 52 and the bottom connecting rod 11 compared with a linear connecting rod, thereby saving installation space.
  • a support assembly 12 for supporting the mechanical extension unit 2 is provided on the base 1.
  • the support assembly includes a support plate 121, which is connected to the base 1, and the support plate 121 is rotatably connected to the mechanical extension unit 2 through a multi-segment link.
  • a link group is hinged on the support plate 121, the link group includes a plurality of support links 122, and the head and tail of two adjacent support links 122 are hinged to each other.
  • the support link 122 at the head end is hinged to the support plate 121, and the support link 122 at the tail end is fixedly connected to the bottom link 11. Therefore, the support assembly 12 can rotate with the change of the shape of the mechanical extension unit 2 to continuously support.
  • a curved connecting rod 123 is rotatably connected to the supporting connecting rod 122 at the rear end.
  • the curved connecting rod 123 is divided into a first extension section 1231 and a second extension section 1232 along its length direction.
  • the second extension section 1232 is hinged to the supporting link 122, and the second extension section 1232 is bent in a direction away from the bottom link 11 along its own length, and the first extension section 1232 is hinged to the rear longitudinal link 7.
  • the bending link 123 drives the support link 122 to rotate with the rotation of the rear longitudinal link 7, and the second extension 1231 is bent along its own length in a direction away from the bottom link 11 to avoid interference with the bottom link 11.
  • the first extension section 1231 is also bent in a direction away from the mechanical extension unit 2 along its own length. Avoid interference between the first extension 1231 and the crank connecting member 54.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Dentistry (AREA)
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Abstract

一种机械伸展单元（2）及电动机械伸展装置，机械伸展单元（2）包括脚凳组件（3）、坐垫支撑组件（4）和靠背组件（5），坐垫支撑组件（4）包括座部安装板（41），通过设置有后支撑连杆（8）、第一凳塌连杆（32）、第二凳塌连杆（33）、第一横向连杆（6）、后纵向连杆（7）和座部安装板（41）构成第一连杆机构用以带动脚凳组件（3）相对于座部安装板（41）在收拢位置和伸展位置之间移动；靠背组件（5）包括背靠件（51）、第二横向连杆（52），第二横向连杆（52）平行设于第一横向连杆（6）的一侧，通过设置有前纵向连杆（9）、底部连杆（11）、后纵向连杆（7）和第二横向连杆（52）构成第二连杆机构用以带动靠背组件（5）在依靠位置和后仰位置之间移动。两个机械伸展单元（2）之间设置有驱动机构构成电动机械伸展装置，其运动平稳，伸展过程连贯。

Description

机械伸展单元及电动机械伸展装置 技术领域
本发明涉及用于在基本上坐立的位置支承使用者身体的运动装潢家具领域，更具体的说，涉及一种机械伸展单元及电动机械伸展装置。
 背景技术
当前市面上存在允许使用者相对于座部向前伸展脚凳或凳榻和向后仰靠背的后仰座椅单元。这些已有的座椅单元通常提供三种基本位置：标准的非后仰的收拢位置、伸展位置、以及后仰位置。在收拢位置，底部处于总体上水平的取向而靠背设置成基本直立。另外，如果座椅单元包括附装有机械装置的凳榻，则机械装置折叠使得凳榻不伸展。在通常称为电视（“TV”）位置的伸展位置，凳榻向座部的前方伸展，与此同时靠背，坐垫向后转4度左右的角度，以保证座椅单元的乘坐者舒适地观看电视；在后仰位置，靠背从伸展位置向后定位成与座部成钝角关系以供休息或睡眠。
目前行业内的多种现代的座椅单元诸如躺椅或沙发适用于上述调整功能；目前比较普遍的是采用扳手来控制座椅单元打开；但为了扩大座椅单元的使用范围，提高座椅单元的使用舒适度，目前，许多座椅单元还结合马达提供动力调整，将靠背，坐垫和搁腿板通过马达来驱动以带动靠背、坐垫和搁腿板张开或收拢，以满足使用要求。
尽管许多常规的躺椅能令人满意地操作，但家具制造商们仍然不断追求研制改进的椅子框架和功能架，以便降低系统的复杂性。申请号为“201110021296.1”的专利中提出了一种通过导槽与伸入导槽内的顺序元件来实现座椅单元后仰或收拢的联动机构及座椅单元，其通过顺序元件于导槽内滑动实现座椅单元状态的变化。但是上述仍存在以下问题；
上述座椅单元只能够靠滑动的长槽强行进行伸展，抬起和闭合；从而使伸展装置在功能上，不能够使产品的运动轨迹做到顺畅，因滑槽的空间间隙，导致使用者在靠着靠背的时候，会出现跳动或者位移的状态，很大程度上降低了使用者的体验感。
    且在靠背收拢或伸展的过程中，滑槽所在板块相对上移或下降带动用于坐垫支撑的部件转动，由于滑槽与元件的配合运动轨迹不够顺畅，其用于坐垫支撑的部件转动过程中，也会出现跳动或者位移的问题。
 技术解决方案
为了解决上述的技术问题，本发明的目的是提供一种通过两组连杆机构分别驱动脚凳组件和靠背组件的机械伸展单元，其运动平稳，伸展过程连贯无微量跳动感知，配合电机驱动连杆运作具有极好的体验感，更加满足人们对使用舒适的需求。
解决上述技术问题，本发明采取如下技术方案：
一种机械伸展单元，包括：脚凳组件、坐垫支撑组件和靠背组件，所述坐垫支撑组件包括座部安装板，所述座部安装板的一侧设有与所述座部安装板平行的第一横向连杆，所述第一横向连杆可转动地联接到脚凳组件中的第一凳塌连杆，所述脚凳组件中的第一凳塌连杆的尾端、第二凳塌连杆的尾端与所述座部安装板铰接，所述第一横向连杆的尾端铰接有后纵向连杆，所述后纵向连杆通过后支撑连杆与所述座部安装板铰接，所述座部安装板、第一凳塌连杆、第二凳塌连杆、第一横向连杆、后纵向连杆和后支撑连杆构成脚凳连杆机构用以带动所述脚凳组件相对于座部安装板在收拢位置和伸展位置之间移动；     所述靠背组件包括背靠件、第二横向连杆，所述第二横向连杆平行设于所述第一横向连杆的一侧，所述背靠件可枢转地联接到所述座部安装板上，所述第二横向连杆的尾端与所述背靠件可转动连接，所述第二横向连杆的前端铰接有前纵向连杆，所述前纵向连杆的中部铰接有底部连杆，所述底部连杆铰接有后纵向连杆，所述后纵向连杆与所述第二横向连杆连接，所述第二横向连杆、前纵向连杆、底部连杆、后纵向连杆构成靠背驱动连杆机构用以带动所述靠背组件在收合位置和后仰位置之间移动；     且所述前纵向连杆的尾端上设置有前支撑件，所述前支撑件与所述座部安装板相连，用以于前纵向连杆转动时带动座部安装板上升或下降。
在进一步的方案中，所述座部安装板的中部铰接有第一转动件，所述底部连杆的中部铰接有第二转动件，所述第一转动件与所述第二转动件可转动连接；当第一转动件相对于所述第二转动件转动时，所述第一转动件带动座部安装板远离或靠近底部连杆，继而引发靠背驱动连杆机构带动靠背组件在收合位置和后仰位置之间移动。位于座部安装板与底座之间的第一转动件相对第二转动件转动以带动座部安装板远离或靠近底座实现座部安装板升降。在实现座部安装板升降的同时，由于第一转动件位于座部安装板的中部，第二转动件位于底部连杆的中部，第一转动件与第二转动件也构成了座部安装板的中部支撑，增强座部安装板的承载能力，提高了结构的稳定性。
在进一步的方案中，所述前纵向连杆的包括第一连接板与第二连接板，所述第一连接板与第二连接板交叉设置构成V字型结构，所述底部连杆与前纵向连杆于第一连接板和第二连接板的交会处铰接，所述第一连接板与所述第二横向连杆铰接，所述第二连接板与所述前支撑件铰接，且所述第一连接板始终与第一转动件平行。
在进一步的方案中，所述前纵向连杆于第一连接板和第二连接板的交会处设置有卡槽，所述前支撑件上设置有限位件，所述背靠件处于收合位置时，所述限位件与所述卡槽内壁相抵。防止背靠件过度转动超过收合位置所处的预设点位。
在进一步的方案中，所述靠背组件还包括第三横向连杆和曲柄连接件，所述第三横向连杆的尾端与所述背靠件的尾端相互铰接，所述第三横向连杆中部与所述第二横向连杆的尾端铰接，所述曲柄连接件包括第三连接板与第四连接板，所述第三连接板与第四连接板交叉设置构成V字型结构，所述第三连接板与所述第三横向连杆的头端铰接，所述底部连杆于第三连接板与第四连接板的交会处与曲柄连接件连接，所述第四连接板与所述后支撑件铰接，所述第三连接板始终与所述第一转动件平行。
在进一步的方案中，所述第三横向连杆上设置有第二凸起，所述背靠件处于后仰位置时，所述第二凸起与所述后支撑连杆的侧壁相抵。通过第二凸起与后支撑连杆的侧壁相抵形成限位，防止背靠件持续后仰下落。
本发明同时提出一种电动机械伸展装置，包括底座，所述底座上呈镜像对称设置有上述方案中所述的机械伸展单元，且两个机械伸展单元之间设有驱动机构；所述驱动机构包括线性驱动器、前马达管和后马达管，所述线性驱动器分别和前马达管、后马达管连接，用以先后驱动所述前马达管、后马达管做进给运动；所述前马达管的两端分别与两个机械伸展单元中的脚凳组件连接，以带动脚凳组件在收拢位置和伸展位置之间移动；所述后马达管的两端分别与两个机械伸展单元中的靠背驱动连杆机构连接，以驱动靠背驱动连杆机构带动靠背组件在收合位置和后仰位置之间移动，且带动座部安装板远离或靠近底部连杆。
在进一步的方案中，所述前马达管的两端分别与两个脚凳组件中的第二凳塌连杆连接，以驱动所述脚凳连杆机构运转。
在进一步的方案中，所述后马达管的两端分别与两个机械伸展单元中的第一转动件连接，所述第一转动件随所述后马达管相对于所述第二转动件转动以带动座部安装板远离或靠近底部连杆；且所述座部安装板远离或靠近底部连杆时，所述前支撑件带动所述前纵向连杆转动，所述后支撑件带动后纵向连杆转动，引发靠背驱动连杆机构带动靠背组件在收合位置和后仰位置之间移动。
 有益效果
1、脚凳组件通过多个连杆构成连杆组件实现驱动，其运动平稳，伸展过程连贯无微量跳动感知，具有极好的体验感，更加满足人们对使用舒适的需求。
2、通过第二连杆驱动座部安装板上升或下降，克服了市场上普遍利用的滑槽顶起坐框的传动方式，其运动平稳，伸展过程连贯无微量跳动感知，具有极好的体验感，更加满足人们对使用舒适的需求。
3、通过第一横向连杆带动所述脚凳组件相对于座部安装板在收拢位置和伸展位置之间移动；第二连杆机构带动所述靠背组件在收合位置和后仰位置之间移动。脚凳组件和靠背组件分别通过两个连杆机构驱动，其结构运行更加稳定。
4、第一横向连杆位于座部安装板的一侧，第二横向连杆位于第一横向连杆的一侧，使得座部安装板、第一横向连杆、第二横向连杆所处高度近乎一致，大幅减少了机械伸展单元的纵向高度，便于后续装配。
5、在转动的过程中，前支撑件和后支撑件不仅实现了驱动背靠件的移动，且前支撑件和后支撑件也对座部安装板起到支撑作用，提高了结构的稳定性。
 附图说明
图1为电动机械伸展装置的结构示意图；
图2为机械伸展单元在脚凳组件处于收拢位置且靠背组件处于收合位置时的结构示意图；
图3为机械伸展单元在脚凳组件处于伸展位置且靠背组件处于后仰位置时的结构示意图；
图4为脚凳组件与脚凳连杆机构在脚凳组件处于收拢位置时的结构示意图；
图5为脚凳组件与脚凳连杆机构在脚凳组件处于伸展位置时的结构示意图；
图6为背靠组件与靠背驱动连杆机构在靠背组件处于收合位置时的结构示意图；
图7为背靠组件与靠背驱动连杆机构在靠背组件处于后仰位置时的结构示意图；
图8为前纵向连杆的结构示意图；
图9为曲柄连接件的结构示意图；
图10为弯曲连杆的结构示意图；
图11为背靠件的结构示意图；
图12为机械伸展单元于在脚凳组件处于收拢位置且靠背组件处于收合位置时的立体结构示意图；
图13为机械伸展单元于在脚凳组件处于伸展位置且靠背组件处于收合位置时的立体结构示意图；
图14为机械伸展单元于在脚凳组件处于伸展位置且靠背组件处于后仰位置时的立体结构示意图及局部放大图；
图15为机械伸展单元在脚凳组件处于收拢位置且靠背组件处于收合位置时的正视图；
图16为机械伸展单元在脚凳组件处于伸展位置且靠背组件处于后仰位置时的正视图。
示意图中的标号说明：
1-底座，2-机械伸展单元，3-脚凳组件，31-搁脚板，32-第一凳塌连杆，33-第二凳塌连杆，34-第三凳塌连杆，35-第四凳塌连杆，4-坐垫支撑组件，41-座部安装板，5-靠背组件，51-背靠件，511-靠背插入段，512-连接段，52-第二横向连杆，53-第三横向连杆，531-第二凸起，54-曲柄连接件，541-第三连接板，542-第四连接板， 6-第一横向连杆，7-后纵向连杆，8-后支撑件，9-前纵向连杆，91-第一连接板，92-第二连接板，93-卡槽，10-前支撑件，101-限位件，11-底部连杆，12-支撑组件，121-支撑板，122-支撑连杆，123-弯曲连杆，1231-第一延伸段，1232-第二延伸段，13-驱动组件，131-线性驱动器，132-前马达管，133-后马达管，134-滑块，135-驱动导轨，滑动槽136，14-第一转动件，15-第二转动件。
 本发明的实施方式
为进一步了解本发明的内容，结合附图和具体实施方式对本发明作详细描述。
在本发明的描述中，需要理解的是，术语“中心”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
请参阅图1-16，本实施例提出了一种机械伸展装置，包括底座1及两个机械伸展单元2，两个机械伸展单元2于底座1上呈镜像对称设置。
在本实施例中，每个机械伸展单元2均包括脚凳组件3、坐垫支撑组件4和靠背组件5。其中，脚凳组件3包括搁脚板31，所述搁脚板31上连接有第三凳塌连杆34与第四凳塌连杆35，第三凳塌连杆34与第四凳塌连杆35相互平行，第三凳塌连杆34上铰接有第一凳塌连杆32，第四凳塌连杆35上铰接有第二凳塌连杆33，第一凳塌连杆32与第二凳塌连杆33相平行，第二凳塌连杆33与第三凳塌连杆34相互交叉且于交叉处相铰接。
坐垫支撑组件4包括座部安装板41，座部安装板41的一侧设有与座部安装板41平行的第一横向连杆6。第一横向连杆6的头端可转动地联接到第一凳塌连杆32上，第一凳塌连杆32的尾端（即远离搁脚板31的一端）、第二凳塌连杆33的尾端均与座部安装板41铰接。
且第一横向连杆6的尾端（即远离搁脚板31的一端）铰接有后纵向连杆7，后纵向连杆7的中部铰接有曲柄连接件54，该曲柄连接件54为背靠组件中的一个部件。在本方案中，如图9所示，曲柄连接件54包括第三连接板541与第四连接板542，第三连接板541与第四连接板542交叉设置构成V字型结构。其中，第四连接板542铰接有后支撑连杆8。曲柄连接件54通过后支撑连杆8与座部安装板41连接。具体的，后支撑连杆8的尾端（即远离背靠件51的一端）与曲柄连接件54上的第四连接板542铰接，而后支撑连杆8的头端与座部安装板41固定连接。同时，后纵向连杆7与曲柄连接件54于第三连接板541和第四连接板542的交会处铰接。
第一凳塌连杆32和第二凳塌连杆33构成凳塌连杆组，通过座部安装板41、凳塌连杆组、第一横向连杆6、后纵向连杆7、曲柄连接件54和后支撑连杆8构成一个大致呈四边形的自锁闭环式脚凳连杆机构，用以带动脚凳组件3相对于座部安装板41在收拢位置和伸展位置之间移动。
当脚凳连杆机构运转，第一横向连杆6朝搁脚板31方向移动时，如图5所示，第一横向连杆6推动所述第一凳塌连杆32转动，所述第一凳塌连杆32带动所述第三凳塌连杆34顶升搁脚板31，进而带动第四凳塌连杆35与第二凳塌连杆33转动直至搁脚板31处于伸展位置。
反之，当脚凳连杆机构运转，带动第一横向连杆6朝远离搁脚板31方向的移动时，第一横向连杆6拉扯所述第一凳塌连杆32转动，所述第一凳塌连杆32带动所述第三凳塌连杆34带回搁脚板31，实现脚凳组件3的收缩。通过多个连杆构成连杆组件实现驱动，其运动平稳，伸展过程连贯无微量跳动感知，具有极好的体验感，提高了产品的舒适度。
同时，本方案中，靠背组件5包括背靠件51、第二横向连杆52和第三横向连杆53。该方案中，如图11所示，背靠件51为L形连杆，其于弯折处的两侧分别为靠背插入段511、连接段512。其中靠背插入段511用于插入靠背。连接段512与第三横向连杆53铰接背靠件51于弯折处与座部安装板41铰接。
第二横向连杆52平行设于第一横向连杆6的一侧，第三横向连杆53与第二横向连杆52的尾端铰接。且第二横向连杆52的前端（即靠件搁脚板31的一端）还铰接有前纵向连杆9，前纵向连杆9的中部铰接有和底座1固定连接的底部连杆11，底部连杆11与后纵向连杆7的尾端铰接，曲柄连接件54的第三连接板541与第三横向连杆53铰接。且如上述脚凳连杆机构中所述的，曲柄连接件54的第四连接板542还铰接有后支撑连杆8，曲柄连接件54通过后支撑连杆8与座部安装板41连接。具体的，后支撑连杆8的尾端与曲柄连接件54铰接，而后支撑连杆8的头端与座部安装板41固定连接。同时，后纵向连杆7的中部与曲柄连接件54于第三连接板541和第四连接板542的交会处铰接。
通过第三横向连杆53、第二横向连杆52、前纵向连杆9、底部连杆11、后纵向连杆7、曲柄连接件54构成靠背驱动连杆机构用以带动靠背组件5在收合位置和后仰位置之间移动。
当靠背驱动连杆机构运作（即靠背组件5向后仰位置移动时），第二横向连杆52与底部连杆11的纵向间距增大，如图7所示，第二横向连杆52向远离背靠件51的方向移动，拉扯第三横向连杆53进而带动背靠件51相对于座部安装板41翻转，直至背靠件51处于后仰位置。且在本方案中前纵向连杆9的尾端上设置有前支撑件10。
作为一种较优的实施方式，请参阅图8，前纵向连杆9包括第一连接板91与第二连接板92，第一连接板91与第二连接板92交叉设置构成V字型结构。底部连杆11与前纵向连杆9于第一连接板91和第二连接板92的交会处铰接，第一连接板91与第二横向连杆52铰接，第二连接板92与所述前支撑件10铰接。前支撑件10与座部安装板41固定相连，在靠背驱动连杆机构运作时，第二横向连杆52与底部连杆11的纵向间距增大，此过程中，前纵向连杆9翻转。由于前纵向连杆9于第一连接板91和第二连接板92的交会处与底部连杆11铰接，前纵向连杆9的第二连接板92与前支撑件10铰接，在前纵向连杆9翻转的过程中，前纵向连杆9顶升前支撑件10，进而抬高座部安装板41的高度，达到带动座部安装板41上升的目的。且通过前纵向连杆9为V字型结构，相较于直线连杆缩短了第二横向连杆52与底部连杆11的间距，节省了安装空间。
同时，前纵向连杆9于第一连接板91和第二连接板92的交会处设置有卡槽93，前支撑件10朝脚凳组件3方向倾斜向上设有支撑延伸段，且于该支撑延伸段上设置有限位件101，在本方案中，限位件101为一个柱状限位块。具体的，该柱状限位块为贯穿前支撑件的限位轴的轴头。当背靠件51处于收合位置时，柱状限位块与上述卡槽93内壁相抵。对前纵向连杆9形成行程限位，避免前纵向连杆9转动超出行程，进而防止背靠件51过度转动超过收合位置所处的预设点位。同样的，在防止背靠件51过度转动超过收合位置所处的预设点位的同时，靠背驱动连杆机构停止运作也对座部安装板41形成了行程限位，使得座部安装板41可以下降到指定的位置。
反之，当靠背驱动连杆机构运作使得第二横向连杆52与底部连杆11的纵向间距减小时（即靠背组件5向收合位置移动时），第二横向连杆52向背靠件51方向移动，推动第三横向连杆53带动背靠件51相对于座部安装板41翻转直至背靠件51处于收合位置。此过程中，前纵向连杆9翻转，前纵向连杆9带动前支撑件10下降，进而降低座部安装板41的高度，达到带动座部安装板41下降的目的。
且第三横向连杆53上设置有第二凸起531。具体的，本方案中，第二凸起531为贯穿第三横向连杆53的限位轴的轴头。当背靠件51处于后仰位置时，所述第二凸起531与所述后支撑连杆8的侧壁相抵。通过第二凸起531与后支撑连杆8的侧壁相抵形成限位，防止背靠件51持续后仰下落。同样的，在防止背靠件51持续后仰下落的同时，靠背驱动连杆机构停止运作也对座部安装板形成了行程限位，使得座部安装板可以抬升到指定的位置。
通过靠背驱动连杆机构驱动座部安装板41上升或下降，克服了市场上普遍利用的滑槽顶起坐框的传动方式，其运动平稳，伸展过程连贯无微量跳动感知，具有极好的体验感，更加满足人们对使用舒适的需求。脚凳组件3和靠背组件5分别通过两个连杆机构驱动，其结构运行也更加稳定，提高使用者在产品使用时的舒适感。同时，请参阅图12-15，本方案中座部安装板41、第一横向连杆6、第二横向连杆52相互平行，在运作过程中不会相互干涉，保证机构平稳运行。且座部安装板41、第一横向连杆6、第二横向连杆52所处高度近乎一致，大幅减少了机械伸展单元2的纵向高度，便于机械伸展装置的后续装配。
且本方案中，机械伸展单元2上还设置用于驱动脚凳连杆机构和靠背驱动连杆机构运作的驱动机构13。驱动机构13包括线性驱动器131、前马达管132和后马达管133。线性驱动器131分别和前马达管132、后马达管133连接，以先后驱动所述前马达管132、后马达管133做进给运动。
具体的，在本方案中线性驱动器131为平推电机，前马达管132与平推电机上的驱动导轨135的前端连接，且前马达管132的两端分别与两个机械伸展单元中的脚凳组件3连接。再具体的，前马达管131的两端分别与两个第二凳塌连杆33连接。前马达管131驱动脚凳组件3伸展的过程及其限位关系可参考申请号为“201521033364.6 ”的《机械伸展装置及座具》。前马达管131驱动第二凳塌连杆33向前伸展，进而带动第三凳塌连杆34配合第一凳塌连杆32与第四凳塌连杆35向前伸展顶升搁脚板31至伸展位置。而当搁脚板31至伸展位置时，第二凳塌连杆33上的限位件与第三凳塌连杆34的侧壁相抵，形成行程限位。
在本方案中，底部连杆11位于座部安装板41的下方且与座部安装板41大致平行。且座部安装板41的中部铰接有第一转动件14，底部连杆11的中部铰接有第二转动件15，第一转动件14与第二转动件15可转动连接。后马达管133的两端分别与两个机械伸展单元2中的第一转动件14连接。为了避免第一转动件14在转动过程中与第一横向连杆6、第二横向连杆52及底部连杆11发生干涉，在本方案中，如图14所示，第一转动件14包括第一转动板141、第二转动板142、第三转动板143及第四转动板144，且第一转动板141、第二转动板142、第三转动板143及第四转动板144沿第一转动件14长度方向依次交叉设置，使得第一转动件14呈W形结构。其中第一转动板141与座部安装板41铰接，第一横向连杆6、第二横向连杆52位于第一转动板141和第二转动板142之间。且第二转动件15与第三转动板143铰接，第四转动板144与后马达管133连接。
在本方案中后马达管133上连接有一个滑动块134，滑动块134上设置有滑动槽136，滑动块134通过该滑动槽136滑动设置于与平推电机相连的驱动导轨135上。当脚蹬组件3移动至伸展位置时，平推电机仍在运转欲迫使前马达管131向前运动，但是由于第二凳塌连杆33上的限位件与第三凳塌连杆34的侧壁相抵，形成行程限位。使得可于驱动导轨135相对滑动的滑动块134移动，即平推电机驱动后马达管133移动，进而使得第一转动件14随后马达管133相对于第二转动件15转动。第一转动件14与第二转动件15的纵向长度之和增加，进而使得座部安装板41远离底部连杆11。由于第一转动件14位于座部安装板41的中部，第二转动件15位于底部连杆11的中部，第一转动件14与第二转动件15也构成了座部安装板41的中部支撑，增强座部安装板41的承载能力，提高了结构的稳定性。且在此过程中，靠背驱动连杆机构运作（即靠背组件5向后仰位置移动时），第二横向连杆52与底部连杆11的纵向间距增大，如图7所示，第二横向连杆52向远离背靠件51的方向移动，拉扯第三横向连杆53进而带动背靠件51相对于座部安装板41翻转，直至背靠件51处于后仰位置。
通过第一转动件14与第二转动件15的转动配合、靠背驱动连杆机构带动前支撑件10及后支撑件8升降来驱动座部安装板41上升或下降和驱动背靠件51转动，克服了市场上普遍利用的滑槽顶起坐框的传动方式，其运动平稳，伸展过程连贯无微量跳动感知，具有极好的体验感，更加满足人们对使用舒适的需求。
且在本方案中，前纵向连杆9的尾端上设置有前支撑件10，曲柄连接件54的尾端上设置有后支撑件8。在第一转动件14随后马达管133相对于第二转动件15转动的过程中，前纵向连杆9和曲柄连接件54转动，前纵向连杆9与前支撑件10的纵向长度之和增大，曲柄连接件54与后支撑件8的纵向长度之和增大，于底部连杆11和座部安装板41的头尾两端顶撑底部连杆11和座部安装板41，使得座部安装板41远离底部连杆11，由于底部连杆11与底座1固定连接，座部安装板41远离底部连杆11即完成了座部安装板41的上升动作。前支撑件10和后支撑件8不仅实现了驱动背靠件的移动，且前支撑件10和后支撑件8也对座部安装板起到支撑作用，提高了结构的稳定性。
作为一种较优的实施方式，前纵向连杆9的第一连接板91与曲柄连接件54的第三连接板541均相对于第一转动件14平行设置。请参阅图15和图16，在转动的过程中前纵向连杆9的第一连接板91与曲柄连接件54的第三连接板541始终与第一转动件14保持平行，使得三个部件的转动角度始终保持一致。进而，使得前支撑件10、后支撑件8的相对升降高度与第一转动件14相对于第二转动件15的升降高度相同，使得座部安装板41整体平行上下移动，在升降过程中，座部安装板41整体不会有较大的凹凸起伏变化，提高了乘坐者的舒适程度。且通过前纵向连杆9与曲柄连接件54为V字型结构，相较于直线连杆缩短了第二横向连杆52与底部连杆11的间距，节省了安装空间。
另外，底座1上设置有用于支撑机械伸展单元2的支撑组件12。具体的，支撑组件包括支撑板121，支撑板121与底座1连接，且支撑板121通过多段连杆与机械伸展单元2可转动连接。再具体的，支撑板121上铰接有连杆组，连杆组包括多根支撑连杆122，且相邻两根支撑连杆122的头尾相互铰接。其中位于头端的支撑连杆122与支撑板121铰接，位于尾端的支撑连杆122与底部连杆11固定连接。使得支撑组件12可以随着机械伸展单元2的形态变化而转动，持续进行支撑。同时，本实施例中，位于尾端的支撑连杆122上可转动连接有弯曲连杆123。如图10与图15所示，所述弯曲连杆123上沿自身长度方向分为第一延伸段1231与第二延伸段1232。其中第二延伸段1232与支撑连杆122铰接，且第二延伸段1232沿自身长度向远离底部连杆11的方向弯曲，第一延伸段1232与后纵向连杆7铰接。通过弯曲连杆123带动支撑连杆122随着后纵向连杆7的转动而转动，且通过第二延伸段1231沿自身长度向远离底部连杆11的方向弯曲避免与底部连杆11发生干涉。且第一延伸段1231沿自身长度还向远离所述机械伸展单元2的方向弯曲。避免第一延伸段1231与曲柄连接件54发生干涉 。
需要说明的是，本方案中，各连杆之间的铰接方式均采用柱轴和衬套的轴承式运动副。但是在保证伸展装置运行平稳的情况下，也可以采用现有技术中的其他铰接方式。
还需要说明的是，本方案中所提到的平行均为大致平行。两个相互平行的部件之间可以有较小的角度偏转。

Claims (9)

  1. 一种机械伸展单元，其特征在于，包括：脚凳组件、坐垫支撑组件和靠背组件，所述坐垫支撑组件包括座部安装板，所述座部安装板的一侧设有与所述座部安装板平行的第一横向连杆，所述第一横向连杆可转动地联接到脚凳组件中的第一凳塌连杆，所述脚凳组件中的第一凳塌连杆的尾端、第二凳塌连杆的尾端与所述座部安装板铰接，所述第一横向连杆的尾端铰接有后纵向连杆，所述后纵向连杆通过后支撑连杆与所述座部安装板铰接，所述座部安装板、第一凳塌连杆、第二凳塌连杆、第一横向连杆、后纵向连杆和后支撑连杆构成脚凳连杆机构用以带动所述脚凳组件相对于座部安装板在收拢位置和伸展位置之间移动； 所述靠背组件包括背靠件、第二横向连杆，所述第二横向连杆平行设于所述第一横向连杆的一侧，所述背靠件可枢转地联接到所述座部安装板上，所述第二横向连杆的尾端与所述背靠件可转动连接，所述第二横向连杆的前端铰接有前纵向连杆，所述前纵向连杆的中部铰接有底部连杆，所述底部连杆铰接有后纵向连杆，所述后纵向连杆与所述第二横向连杆连接，所述第二横向连杆、前纵向连杆、底部连杆、后纵向连杆构成靠背驱动连杆机构用以带动所述靠背组件在收合位置和后仰位置之间移动； 且所述前纵向连杆的尾端上设置有前支撑件，所述前支撑件与所述座部安装板相连，用以于前纵向连杆转动时带动座部安装板上升或下降。
  2. 根据权利要求1所述的机械伸展单元，其特征在于，所述座部安装板的中部铰接有第一转动件，所述底部连杆的中部铰接有第二转动件，所述第一转动件与所述第二转动件可转动连接；当第一转动件相对于所述第二转动件转动时，所述第一转动件带动座部安装板远离或靠近底部连杆，继而引发靠背驱动连杆机构带动靠背组件在收合位置和后仰位置之间移动。
  3. 根据权利要求2所述的机械伸展单元，其特征在于，所述前纵向连杆包括第一连接板与第二连接板，所述第一连接板与第二连接板交叉设置构成V字型结构，所述底部连杆与前纵向连杆于第一连接板和第二连接板的交会处铰接，所述第一连接板与所述第二横向连杆铰接，所述第二连接板与所述前支撑件铰接，且所述第一连接板始终与第一转动件平行。
  4. 根据权利要求3所述的机械伸展单元，其特征在于，所述前纵向连杆于第一连接板和第二连接板的交会处设置有卡槽，所述前支撑件上设置有限位件，所述背靠件处于收合位置时，所述限位件与所述卡槽内壁相抵。
  5. 根据权利要求2所述的机械伸展单元，其特征在于，所述靠背组件还包括第三横向连杆和曲柄连接件，所述第三横向连杆的尾端与所述背靠件的尾端相互铰接，所述第三横向连杆中部与所述第二横向连杆的尾端铰接，所述曲柄连接件包括第三连接板与第四连接板，所述第三连接板与第四连接板交叉设置构成V字型结构，所述第三连接板与所述第三横向连杆的头端铰接，所述底部连杆于第三连接板与第四连接板的交会处与曲柄连接件连接，所述第四连接板与所述后支撑件铰接，所述第三连接板始终与所述第一转动件平行。
  6. 根据权利要求5所述的机械伸展单元，其特征在于，所述第三横向连杆上设置有第二凸起，所述背靠件处于后仰位置时，所述第二凸起与所述后支撑连杆的侧壁相抵。
  7. 一种电动机械伸展装置，其特征在于，包括底座，所述底座上呈镜像对称设置有两个如权利要求2-6所述的机械伸展单元，且两个机械伸展单元之间设有驱动机构；所述驱动机构包括线性驱动器、前马达管和后马达管，所述线性驱动器分别和前马达管、后马达管连接，用以先后驱动所述前马达管、后马达管做进给运动；所述前马达管的两端分别与两个机械伸展单元中的脚凳组件连接，以带动脚凳组件在收拢位置和伸展位置之间移动；所述后马达管的两端分别与两个机械伸展单元中的靠背驱动连杆机构连接，以驱动靠背驱动连杆机构带动靠背组件在收合位置和后仰位置之间移动，且带动座部安装板远离或靠近底部连杆。
  8. 根据权利要求7所述的电动机械伸展装置，其特征在于，所述前马达管的两端分别与两个脚凳组件中的第二凳塌连杆连接，以驱动所述脚凳连杆机构运转。
  9. 根据权利要求7所述的电动机械伸展装置，其特征在于，所述后马达管的两端分别与两个机械伸展单元中的第一转动件连接，所述第一转动件随所述后马达管相对于所述第二转动件转动以带动座部安装板远离或靠近底部连杆；且所述座部安装板远离或靠近底部连杆时，所述前支撑件带动所述前纵向连杆转动，所述后支撑件带动后纵向连杆转动，引发靠背驱动连杆机构带动靠背组件在收合位置和后仰位置之间移动。
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