WO2023000512A1 - 一种坐具单元及坐具 - Google Patents

一种坐具单元及坐具 Download PDF

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Publication number
WO2023000512A1
WO2023000512A1 PCT/CN2021/123616 CN2021123616W WO2023000512A1 WO 2023000512 A1 WO2023000512 A1 WO 2023000512A1 CN 2021123616 W CN2021123616 W CN 2021123616W WO 2023000512 A1 WO2023000512 A1 WO 2023000512A1
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WO
WIPO (PCT)
Prior art keywords
seat
footrest
screw
base
driving
Prior art date
Application number
PCT/CN2021/123616
Other languages
English (en)
French (fr)
Inventor
金寺苗
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
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 WO2023000512A1 publication Critical patent/WO2023000512A1/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
    • A47C17/00—Sofas; Couches; Beds
    • A47C17/04—Seating furniture, e.g. sofas, couches, settees, or the like, with movable parts changeable to beds; Chair beds
    • 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
    • A47C17/86—Parts or details for beds, sofas or couches only not fully covered in a single one of the sub-groups A47C17/02, A47C17/04, A47C17/38, A47C17/52, A47C17/64, or A47C17/84; Drawers in or under beds

Definitions

  • the invention relates to the technical field of furniture, in particular to a seat unit and a seat.
  • “Sofa” is a single-seat or multi-seat chair with upholstery; a chair with a spring or thick foam plastic, etc., with armrests on both sides, which is a type of upholstered furniture.
  • the traditional sofa structure is usually relatively fixed, and cannot be flexibly adjusted according to the actual use needs during actual use, resulting in poor comfort and flexibility in use, and cannot well meet the needs of daily use.
  • Existing sofas have a seating structure that can lift and lower the cushion on the sofa base, and when the cushion lifts, the backrest can also be rotated so as to realize the switching between the sitting state and the lying state of the sofa.
  • the existing sofa also has a footrest on the sofa base, and the footrest can be turned over to meet the needs of the user's feet.
  • the seat cushion, the backrest and the footrest in the existing lift-adjustable sofa usually need to be driven by two or even three different driving components, and the structure is complex and the production cost is relatively high.
  • the present invention overcomes the deficiencies in the above-mentioned prior art, and provides a device that can drive the seat, the backrest and the footrest to move relative to the base through the same drive assembly, so as to realize the sitting state and the lying state.
  • a sofa that can be switched from the lying state.
  • a seat unit comprising a base
  • the seat transmission mechanism is arranged on the base;
  • the foot rest transmission mechanism is arranged on the base;
  • a seat located above the base and connected to the seat transmission mechanism
  • the backrest is connected to the seat transmission mechanism, and the backrest can rotate between a leaning position and a reclined position relative to the base;
  • the footrest is connected to the footrest transmission mechanism, and the footrest can rotate between an unfolded position and a retracted position relative to the base;
  • the driving assembly is movably arranged on the base, and the driving assembly can move between the first driving position and the second driving position relative to the base; when the driving assembly moves to the first driving position, the The drive assembly is connected with the seat transmission mechanism, and the drive assembly can drive the seat to rise or fall relative to the base through the seat transmission mechanism; when the base rises, the seat transmission mechanism drives the seat The back rest is synchronously rotated to the reclining position; when the base is lowered, the seat transmission mechanism drives the back rest to the supporting position synchronously; when the driving assembly moves to the second driving position, the The drive assembly is connected to the footrest transmission mechanism, and the drive assembly can drive the footrest to rotate relative to the base through the footrest transmission mechanism.
  • the seat transmission mechanism includes a seat screw, on which a first connecting piece and a second connecting piece are threaded, and the first connecting piece is connected to the seat connection; when the driving assembly is at the first driving position, the driving assembly is connected to the seat screw and can drive the seat screw to rotate around its own axis; the drive assembly drives the seat screw When rotating, the seat part screw rod drives the first connecting part and the seat part to move along the length direction of the seat part screw rod, forcing the seat part to rise or fall relative to the base;
  • the second connecting part is hinged, and the backrest part can be rotated relative to the second connecting part to switch between a leaning position and a reclined position.
  • the seat screw is driven to rotate by the driving assembly to drive the first connecting piece and the second connecting piece to move along the length direction of the seat screw. Only one drive assembly is needed to drive the seat part to rise or fall relative to the base, and when the seat part moves, the backrest part moves synchronously to switch between the resting position and the reclining position.
  • the seat screw includes a first seat screw, both the base and the first seat screw have a head end and a tail end along their own length direction, and the first seat screw The head end of the rod is adjacent to the head end of the base, the first seat screw rod extends along the length direction of the base, and the first seat screw rod is set at an angle with the horizontal plane, so
  • the drive assembly is connected to the first seat screw, and when the drive assembly drives the first seat screw to rotate, the first seat screw drives the first connecting piece and the seat along the first seat The screw rod moves along the length direction, so that the seat member rises or falls relative to the base.
  • the first seat screw extends obliquely upward along the length direction of the base from its tail end to the head end, it only needs to drive the first seat screw to rotate to drive the first connecting piece and the seat along the first
  • the length direction of the screw rod of the seat part moves so that the seat member rises or falls relative to the base, and the structure is simple and the operation is convenient.
  • the seat screw rod also includes a second seat screw rod, the second seat screw rod has a head end and a tail end along its length direction, and the tail end of the first seat screw rod The end is connected to the head end of the second seat screw rod through a universal joint, the second seat screw rod extends along the length direction of the base, and the angle between the second seat screw rod and the horizontal plane is smaller than the first The size of the included angle between a seat screw and the horizontal plane; when the first seat screw rotates, it drives the second seat screw to rotate, so that the second connecting piece is along the length direction of the second seat screw. movement, forcing the backrest to switch between the resting position and the reclining position.
  • the seat screw also includes a second seat screw
  • the tail end of the first seat screw is connected with the head end of the second seat screw through a universal joint, and when the first seat screw rotates, it can drive The second seat screw mandrel rotates synchronously.
  • the second seat screw rod extends horizontally from its tail end to the head end along the length direction of the base. If the second seat screw rod and the first seat screw rod are in the If it is inclined upward on the same straight line, in order to accommodate the screw rod of the second seat part, the overall height of the base needs to be very high, which will increase the production cost.
  • the reduced angle between the screw rod of the second seating part and the horizontal plane greatly reduces the overall height of the base and reduces the production cost.
  • the footrest transmission mechanism includes a transmission screw, the transmission screw is arranged on the base and can rotate around its own axis, and the transmission screw is connected with the footrest;
  • a rotating member is connected to the driving assembly, and the rotating member can rotate around its own axis under the action of the driving assembly; and when the driving assembly moves to the first driving position, the rotating member and the first seat wire
  • the rod is coaxially inserted and fitted to drive the first seat screw to rotate synchronously; when the drive assembly moves to the second driving position, the rotating member is coaxially inserted and fitted with the driving screw to drive
  • the driving screw rods rotate synchronously, and when the driving screw rods rotate, the driving screw rods drive the footrest to rotate between the unfolded position and the folded position relative to the base.
  • the footrest transmission mechanism further includes a footrest worm gear and a footrest worm
  • the footrest worm gear remains relatively fixed with the base
  • the footrest worm is arranged on the footrest plate and is connected to the footrest
  • the footrest worm gear is engaged, and the footrest worm can rotate around its own axis relative to the footrest; and the footrest worm is connected with the transmission screw through a universal flexible shaft; when the transmission screw rotates , the universal flexible shaft drives the footrest worm to rotate synchronously, and the footrest worm drives the footrest to rotate around the center of the footrest worm wheel, so that the footrest is in the unfolded position and the folded position relative to the base Rotate between positions.
  • the structure adopts a worm gear mechanism to drive the footrest to rotate, and the worm gear mechanism is a multi-teeth meshing transmission, and the transmission is stable and the noise is small. And the mechanism has self-locking property, and the structure is more secure.
  • the footrest includes a first footrest and a second footrest, the second footrest is rotatably connected to the base, and a footrest screw is arranged on the second footrest, A transmission member is threadedly connected to the footrest screw, and the transmission member is connected to the first footrest, and the footrest screw is in transmission connection with the footrest worm; the second footrest is relatively opposite to the footrest
  • the footrest worm drives the footrest screw to rotate synchronously, so that the transmission part moves along the length direction of the footrest screw, forcing the first footrest to slide and extend relative to the second footrest
  • the footrest worm drives the footrest screw to rotate synchronously, so that the transmission part moves in the opposite direction along the length of the footrest screw, forcing the first footrest to move relative to the second footrest.
  • Slide shrink
  • the footrest worm gear is fixedly arranged on the base, and the footrest worm is arranged on the footrest board, the footrest worm can move synchronously with the footrest board. And because the footrest worm can move synchronously with the footrest, the footrest worm can be transmission-connected with the footrest screw to drive the footrest screw to rotate, thereby driving the transmission parts on the footrest to move to force the footrest to move in the footrest.
  • the first footrest of the footrest is slidably extended or retracted relative to the second footrest of the footrests.
  • the drive assembly includes a drive motor, the output shaft of the drive motor is connected with a seat worm, and the drive motor is provided with a connecting plate, the rotating part is a seat worm gear, the The seat worm gear is rotatably arranged on the connecting plate, and the seat worm gear cooperates with the seat worm, so that the driving motor can drive the seat worm wheel to rotate around its own axis, and the seat worm gear simultaneously
  • the shaft center is provided with a socket, when the driving assembly moves to the first driving position, the first seat screw is inserted into the socket and fits; when the driving assembly moves to the second driving position, The driving screw rod is inserted into the socket for plugging fit.
  • the first connecting member is provided with a seat pushing member, and the seat screw rotates to drive the seat to rise to the end of the stroke, and the seat pushing member
  • the seat worm gear is opposed to and drives the seat worm wheel to move, so that the seat worm wheel and the driving assembly move from the first driving position to the second driving position.
  • the driving motor automatically moves from the first driving position to the second driving position through the push of the seat pusher, which is convenient and quick.
  • the drive screw rod is connected with a drive pusher, and when the drive screw rotates to drive the footrest to rotate from the unfolded position to the folded position relative to the base, the drive pusher and the The worm gear of the seat part is opposed to and drives the worm wheel of the seat part to move, so that the worm wheel of the seat part and the driving assembly move from the second driving position to the first driving position.
  • the driving motor automatically moves from the second driving position to the first driving position via the transmission pushing member, which is convenient and quick.
  • the head end of the first seat screw is provided with a seat fixture, the tail end of the transmission screw is provided with a fixed connector, and the seat worm gear is provided with a socket;
  • the seat fixing part is inserted into the socket for plugging fit;
  • the fixing connector is inserted into the socket Plug fit.
  • a plurality of first slots are provided on the outer ring wall of the seat fixing member in the circumferential direction at the end far away from the seat screw rod, and on the outer ring wall of the fixing connector at the end away from the One end of the transmission screw rod is provided with a plurality of second slots around its circumference, and the first socket and the second socket are arranged in the socket.
  • the connection between the seat fixing part and the seat worm wheel is a key connection, so as to keep the seat worm wheel and the seat screw to rotate synchronously .
  • the connection mode between the fixed connecting piece and the seat worm wheel is a key connection, thereby keeping the seat worm wheel and the driving screw to rotate synchronously.
  • both the first slot and the second slot are sequentially divided into a first constricted portion, an equal diameter portion and a second constricted portion along the direction from the slot opening to the bottom of the slot.
  • the slot widths of the slot and the second slot are gradually reduced at the first constricted part along the direction from the notch to the bottom of the slot, and the slot widths of the first slot and the second slot are consistent with the equal-diameter part, and the first The groove width of the slot and the second slot gradually decreases at the second constricted part along the direction from the slot opening to the bottom of the slot;
  • the shapes of the two slots match.
  • the head end of the connector also presents a pointed shape. And because the slot width of the slot gradually decreases at the first diameter constriction along the direction from the slot opening to the bottom of the slot, the insertion of the connector can be facilitated.
  • the number of the bases is two, and the two bases are mirrored and extend in the same direction, and one of the bases is not provided with the drive assembly, the footrest drive mechanism and the footrest, The seat screw rods on the two bases are connected in transmission through a transmission connecting piece.
  • the seat screw rods on the two bases are connected through the transmission connector instead of being separately driven by the two drive components, so that the rotation speed or the number of turns of the two seat screw rods are inconsistent and cause the two bases
  • the rising height of the seat parts is inconsistent, which causes the sofa to be skewed.
  • a seat includes the above-mentioned seat unit.
  • the same driving assembly moves between the first driving position and the second driving position relative to the base, so as to respectively drive the two transmission mechanisms of the seat transmission mechanism and the footrest transmission mechanism to move.
  • the seat part and the backrest part can be driven to act simultaneously through the seat transmission mechanism. And when the driving assembly is at the second driving position, the footrest transmission mechanism can drive the footrest to rotate. Only one driving component is needed to complete the position adjustment of the three supporting parts of the sofa, the seat part, the backrest part and the footrest, which reduces the number of driving components, reduces the production cost, and simplifies the equipment structure.
  • the transmission mechanism of the seat part includes a first seat part screw rod and a second seat part screw rod, the seat part is connected to the first seat part screw rod, and the backrest part is connected to the second seat part screw rod. Since the first seat screw rod and the second seat screw rod are connected by a universal joint, the synchronous rotation of the first seat screw rod and the second seat screw rod can be realized, and the seat and the back can be adjusted at the same time. The purpose of relying on pieces. And different from the first seat screw rod, the second seat screw rod extends horizontally from its tail end to the head end along the length direction of the base.
  • the overall height of the base needs to be very high, which will increase the production cost.
  • the reduced angle between the screw rod of the second seating part and the horizontal plane greatly reduces the overall height of the base and reduces the production cost.
  • Fig. 1 is the schematic structural view and the enlarged structural view of the seat unit in the embodiment
  • Fig. 2 is an enlarged view of part A in Fig. 1;
  • Fig. 3 is the side view of sofa extension unit in the embodiment
  • Fig. 4 is a structural schematic diagram and a structural enlarged view of the sofa after one side of the base is removed;
  • Fig. 5 is a schematic structural view of the seat worm gear and the worm gear connector
  • Fig. 6 is a structural schematic diagram of the worm gear and the worm gear connector at the seat part from another perspective;
  • Fig. 7 is the front view of sofa in the embodiment.
  • Fig. 8 is a sectional view of A-A in Fig. 7;
  • Fig. 9 is an enlarged view of part B in Fig. 8.
  • Figure 10 is a schematic structural view of the footrest drive mechanism
  • Fig. 11 is a structural schematic diagram and a structural enlarged view of the sofa from another perspective;
  • Fig. 12 is a schematic structural diagram and an enlarged view of the sofa after removing a sofa extension unit
  • Fig. 13 is a schematic structural view of the seat fixture.
  • the reference signs are: 1-base, 2-seat, 3-backrest, 4-footrest, 5-first footrest, 6-second footrest, 7-screw for seat, 8 -The first seat screw rod, 9-the second seat screw rod, 10-the first connecting piece, 11-the second connecting piece, 12-universal joint, 13-seat chute, 14-seat slider , 15-Limiting convex strip, 16-Limiting groove, 17-The first backing against the chute, 18-The second backing against the chute, 19-The first backing against the slider, 20-The second backing against the slider , 21-transmission rod, 22-first helical gear, 23-second helical gear, 24-foot rest worm gear, 25-foot rest worm, 26-connecting block, 27-card slot, 28-thread segment, 29-step Shaft, 8a-the first transmission rod, 2a-the first support component, 4a-the second support component, 30-the seat worm gear, 31-the seat worm, 30a-worm gear, 31a-worm, 32-drive motor, 33
  • Embodiment As shown in Figures 1-13, the present invention provides a seat unit, which is especially applied to a sofa, and includes two sofa extension units.
  • Each sofa extension unit includes a base 1, and the bases 1 in the two sofa extension units are mirrored and extend toward the same direction.
  • seat transmission mechanisms are provided on the two bases 1 , and the seat transmission mechanisms include seat screw rods 7 .
  • Both the seat screw 7 and the base 1 have a head end and a tail end along their length direction, and the head end of the seat screw 7 is adjacent to the head end of the base 1 .
  • a first connecting piece 10 and a second connecting piece 11 are threaded sequentially on the seat screw 7 along the direction from its head end to its tail end.
  • Each sofa extension unit also includes a seat part 2 and a backrest part 3, wherein the seat part 2 is located above the base 1 and is fixedly connected with the above-mentioned first connecting part 10, and the seat parts in the two sofa support units 2.
  • the inner walls on both sides opposite to each other are connected by connecting plates to form a seat frame.
  • the backrest member 3 is located at the rear end of the base 1 and is hinged to the above-mentioned second connecting member 11 .
  • one of the bases 1 is also provided with a driving assembly, which is connected to the above-mentioned seat screw 7 to drive the seat screw 7 to rotate around its own axis.
  • the seat screw 7 While the seat screw 7 rotates, the seat screw 7 will drive the first connector 10 and the second connector 11 to move along the length direction of the seat screw 7 .
  • the seat screw 7 includes a first seat screw 8 and a second seat screw 9, the first seat screw 8 and the second seat screw 9 are all along the The self-length direction has a head end and a tail end.
  • the head end of the first seat screw rod 8 is adjacent to the head end of the base 1 , and the above-mentioned driving assembly is connected with the head end of the first seat screw rod 8 .
  • the tail end of the first seat screw 8 is connected with the head end of the second seat screw 9 through the universal joint 12 to drive the second seat screw 9 to rotate synchronously.
  • the above-mentioned first connecting piece 10 is screwed with the first seat screw 8
  • the second connecting piece 11 is screwed with the second seat screw 9 .
  • the first seat screw rod 8 extends along the length direction of the base 1 , and the first seat screw rod 8 is set at an angle with the horizontal plane. Specifically, in this solution, the first seat screw 8 extends obliquely upward from its tail end to its head end.
  • the driving motor 32 drives the first seat screw 8 to rotate
  • the first seat screw 8 drives the first connecting member 10 to move along the length direction of the first seat screw 8 .
  • the first connecting member 10 moves from the tail end of the first seat screw 8 to the head end of the first seat screw 8 since the first seat screw 8 extends obliquely upward from its own tail end to the head end. , it will drive the first connecting part 10 to move upward in the vertical direction, and will drive the seat part 2 to rise relative to the base 1 .
  • the driving motor 32 reversely rotates so that the first connecting member 10 moves from the head end of the first seat screw rod 8 to the tail end of the first seat screw rod 8, it will drive the seat member 2 relative to Pedestal 1 descends.
  • the tail end of the first sitting part screw mandrel 8 is then connected with the head end of the second sitting part screw mandrel 9 by the universal joint 12, when driving the first sitting part screw mandrel 8 to rotate at the drive motor 32, the first sitting part
  • the second seat screw mandrel 9 will rotate synchronously to drive the second connecting piece 11 to be fed from the tail end of the second seat screw mandrel 9 to the head end of the second seat screw mandrel 9, thereby driving the backrest member 3 relative
  • the rotation of the second connecting part 11 makes the backrest part 3 fall backward synchronously during the rising process of the seat part 2 to switch from the resting position to the reclined position.
  • the driving assembly drives the first seat screw mandrel 8 to reversely rotate, so that the first connecting member 10 moves from the head end of the first seat screw mandrel 8 to the tail end of the first seat screw mandrel 8, the second The seat screw 9 will rotate synchronously to drive the second connector 11 to feed from the head end of the second seat screw 9 to the tail end of the second seat screw 9, thereby driving the backrest 3 relative to the first The two connecting parts 11 rotate, so that the backrest part 3 resets synchronously during the process of the seat part 2 descending, so as to switch from the reclined position to the resting position.
  • the base 1 is provided with several seating chute 13, and the extension direction of the seating chute 13 is the same as the extension direction of the first seat screw 8. .
  • the first connecting piece 10 is provided with a plurality of seating sliders 14, the number of seating sliders 14 is the same as that of the seating chute 13 and corresponds one by one, and the seating sliders 14 can be slidably arranged on the corresponding seating slides.
  • slot 13 , and the seating slider 14 is relatively fixed to the base 1 along the groove depth direction of the seating sliding slot 13 . Specifically, as shown in Fig.
  • the groove wall of the seat slide 13 is provided with a limit protrusion 15 extending along its own length direction
  • the outer wall of the seat slide 14 is provided with a limit groove 16, the limit The convex strip 15 is stuck in the limit groove 16, so that the seat slider 14 is relatively fixed with the base 1 along the groove depth direction of the seat chute 13, without affecting the seat slider 14 in the seat chute 13 slides within.
  • the screw rod 8 of the first seating portion rotates to drive the first connecting piece 10 to move
  • the seating slider 14 moves in the seating slide groove 13 to guide the movement of the first connecting piece 10 .
  • the base 1 is also provided with a first backrest chute 17 and a second backrest chute 18, the first backrest chute 17 is slidably provided with a first backrest slider 19, and the second backrest chute 18 A second backrest slider 20 is arranged inside.
  • the first backrest slider 19 is hinged with the backrest member 3
  • the second backrest slider 20 is connected with the second connector 11, and the extension direction of the second backrest chute 18 is consistent with the extension of the second seat part screw rod 9. same direction.
  • the first backrest chute 17 has a head end and a tail end along its own length direction, and the first backrest chute 17 gradually approaches the second seat screw 9 along the direction from its tail end to the head end.
  • the first backing slider 19 and the second backing slider 20 are relatively fixed to the base 1 along the groove depth direction of the first backing sliding groove 17 .
  • first back rest chute 17 and the second back rest chute 18 are also provided with a limit protrusion 15, the first back rest slide block 19 and the second back rest chute 18.
  • Limiting grooves 16 are provided on the outer wall of the back against the slider 20 , and the limiting protrusions 15 are inserted into the corresponding limiting grooves 16 for sliding fit.
  • the first seat screw 8 and the second seat screw 9 are not on the same straight line.
  • the angle between the second seat screw rod 9 and the horizontal plane is smaller than the angle between the first seat screw rod 8 and the horizontal plane.
  • the second seat screw 9 extends horizontally along the length direction of the base 1 from its tail end to its head end. If the second seat screw mandrel 9 is set at an angle with the horizontal plane like the first seat screw mandrel 8, in order to accommodate the second seat screw mandrel 9, the overall height of the base 1 needs to be very high so that it will Increase production costs.
  • the second seat screw 9 extends horizontally along the length direction of the base 1 from its tail end to the head end, which greatly reduces the overall height of the base 1 and reduces the production cost.
  • the screw rod 9 of the second seating portion and the horizontal plane do not necessarily have to be completely parallel, and may also have a slight included angle.
  • the pitch of the thread on the screw rod 8 of the first seating part is smaller than the pitch of the thread on the screw rod 9 of the second seat part. Since the same drive assembly drives the first seat connecting rod and the second seat connecting rod to rotate synchronously, the number of rotations of the first seat connecting rod and the second seat connecting rod is the same.
  • the pitch of the thread on the first seat screw 8 is less than the pitch of the thread on the second seat screw 9, so when turning the same number of turns , the moving distance of the second connecting part 11 will be greater than the moving distance of the first connecting part 10, which will make the backrest part 3 rotate faster than the seat part 2's lifting speed, so that the angle adjustment process can be avoided.
  • the pitch of the thread on the first seat screw 8 is less than the pitch of the thread on the second seat screw 9, so when turning the same number of turns , the moving distance of the second connecting part 11 will be greater than the moving distance of the first connecting part 10, which will make the backrest part 3 rotate faster than the seat part 2's lifting speed, so that the angle adjustment process can be avoided.
  • the transmission connector includes a transmission rod 21 , a first helical gear 22 is provided at both ends of the transmission rod 21 , and a second helical gear 23 is provided at the tail ends of the seat screw 7 on the two bases 1 .
  • the first helical gears 22 at both ends of the transmission rod 21 are respectively engaged with the second helical gears 23 at the tail ends of the seat screw rods 7 on the two bases 1 to realize transmission.
  • the seat screw rods 7 on the two bases 1 are connected through the transmission of the helical gear 52 and the transmission rod 21, instead of being driven separately by the two driving components, so that the rotation speed or the number of turns of the two seat screw rods 7 can be avoided. Inconsistency leads to inconsistency in rising heights of the seat parts 2 on the two bases 1, resulting in the sofa being skewed.
  • the base provided with the drive assembly in this solution is provided with a footrest transmission mechanism, the footrest transmission mechanism is connected with a footrest 4, and the footrest 4 is rotatably connected with the base 1 and can be unfolded or moved relative to the base 1.
  • the seat frame connected to the base 1 is provided with a footrest worm gear 24, and the footrest 4 is provided with a footrest worm 25, the footrest worm 25 and the footrest worm gear 24 are engaged, And the footrest worm 25 can rotate around its own axis relative to the footrest 4 .
  • the drive assembly drives the footrest worm 25 to rotate, and the footrest 25 will drive the footrest 4 to rotate around the center of the footrest worm 24, so that the footrest 4 is relatively to the seat frame And the base 1 is unfolded or folded.
  • a connecting block 26 is arranged on the footrest 4 , and the connecting block 26 is rotatably connected with the base 1 .
  • two sides of the connecting block 26 are provided with upwardly extending lugs, and the lugs on both sides are rotatably connected to the footrest worm wheel 24 through a rotating shaft, so that the connecting block 26 is rotatably connected to the base 1 .
  • the connecting block 26 is also provided with a card slot 27 , and the bottom of the card slot 27 is opposite to the wheel wall of the worm gear 24 with feet resting on it.
  • the footrest worm 25 includes a threaded section 28 provided with helical patterns, and the two ends of the threaded section 28 are provided with stepped shafts 29, and the stepped shafts 29 at both ends of the threaded section 28 all pass through the groove wall of the card groove 27 and are exposed outside the connecting block 26, and The stepped surface between the threaded section 28 and the stepped shaft 29 abuts against the inner wall of the locking groove 27 .
  • the connecting block 26 on the footrest 4 is provided with a card slot 27, and the step shafts 29 at both ends of the threaded section 28 on the footrest worm 25 pass through the wall of the card slot 27 and are exposed outside the connecting block 26.
  • the step surface between the threaded section 28 and the step shaft 29 is offset against the inner wall of the draw-in groove 27, and the footrest screw can only rotate around its own axis relative to the connecting plate 33 and the footrest 4, and the footrest screw in other directions Realize position-limiting, avoid that footrest screw rod disengages from footrest 4.
  • the power switching device includes a base 1 and a driving assembly.
  • the base 1 is provided with a first transmission rod 8a and a second transmission rod 60a, and both the first transmission rod 8a and the second transmission rod 60a can rotate around their own axes.
  • the first support member 2a is connected to the first transmission rod 8a
  • the second support member 4a is connected to the second transmission rod 60a.
  • the driving assembly is movably disposed on the base 1 , and the driving assembly can move relative to the base 1 between a first driving position and a second driving position.
  • a rotating member is also connected to the driving assembly, and the rotating member can rotate around its own axis under the action of the driving assembly.
  • the driving assembly drives the rotating member to move synchronously, so that the rotating member is coaxially plugged with the first transmission rod 8a to drive the first transmission rod 8a to rotate synchronously, and the first transmission rod 8a rotates At the same time, it can drive the first support member 2a to move back and forth between the first position and the second position relative to the base 1 .
  • the driving assembly drives the rotating member to move synchronously, so that the rotating member is coaxially plugged with the second transmission rod 60a to drive the second transmission rod 60a to rotate synchronously, and the second transmission rod 60a rotates At the same time, it can drive the second support member 4a to move back and forth between the third position and the fourth position relative to the base 1 .
  • the driving assembly includes a driving motor 32 , and a worm 31 a is connected to an output shaft of the driving motor 32 .
  • the above-mentioned rotating part is a worm wheel 30a.
  • a connecting plate 33 bent and extended upward is provided on the driving motor 32, and the worm wheel 30a is rotatably arranged on the connecting plate 33 on.
  • the drive assembly further includes a worm gear connector 43 , and the worm gear connector 43 has a front end and a rear end along its length direction.
  • the front end of the worm gear connector 43 is connected to one end surface of the worm gear 30a, and the rear end of the worm gear connector 43 is provided with a boss 44 .
  • the connection plate 33 is provided with a through hole, the boss 44 at the rear end of the worm gear connector 43 passes through the through hole and is covered with a cover plate 45, the cover plate 45 cooperates with the worm gear connector 43 to form a limit on the two ends of the connection plate 33, So that the worm wheel 30a can only rotate around its own axis relative to the connecting plate 33 .
  • the first transmission rod 8a in the power switching device is a first screw rod, and the first screw rod is connected with a first pushing member 34a.
  • the first screw rod rotates to drive the first supporting member 2a to move from the first position to the second position relative to the base 1
  • the first pushing member 34a moves along the length direction of the first screw rod and contacts with the worm wheel 30a.
  • the worm gear 30a and the driving motor 32 to move from the first driving position to the second driving position, when the worm gear 30a moves to the second driving position, it will automatically plug and cooperate with the second transmission rod 60a to realize power switching.
  • the second transmission rod 60a in the power switching device is a second screw rod
  • the second screw rod is connected with the second pushing member 35a
  • the rotation of the second transmission rod 60a drives the second support member 4a relative to
  • the second pushing member 35a moves along the length direction of the second screw rod and abuts against the connecting plate 33 on the driving motor 32 to push the worm wheel 30a and the driving assembly
  • the worm gear 30a is plugged and matched with the first screw again to realize power switching.
  • first pushing member 34a is against the worm wheel 30a in the above structure, and the second pushing member 35a is against the connecting plate 33, after the worm wheel 30a and the worm gear connecting member 43 are exchanged, it can also be the first The pushing piece 34a is against the connecting plate 33, and the second pushing piece 35a is against the worm wheel 30a.
  • an insertion hole 42 is provided on the worm wheel 30 a , and the insertion hole 42 passes through the worm wheel 30 a , the cover plate 45 , the boss 44 and the worm wheel connector 43 in sequence. And in order to ensure that the first screw rod and the second screw rod can rotate synchronously with the worm wheel 30a when inserted into the insertion hole 42 .
  • One end of the first screw rod is provided with a first fixing member 36a, and one end of the second screw rod is provided with a second fixing member 37a.
  • the first fixing member 36a is inserted into the insertion hole 42 and keyed to the worm wheel 30a.
  • the second fixing member 37a is inserted into the insertion hole 42 and keyed to the worm wheel 30a.
  • a plurality of slots are arranged around the circumference of itself at the end away from the seat part screw rod 7, which are the first slot 38 and the second slot 38.
  • a plurality of slots, which are second slots 39 are also provided on the outer ring wall of the fixing member 37a at the end far away from the second screw rod.
  • a socket is disposed in the hole, and the socket includes a first socket 40 and a second socket 41 , the first socket 40 and the second socket 41 face opposite to each other.
  • the first slot 38 and the second slot 39 are divided into the first diameter reduction part 46, the equal diameter part 47 and the second diameter reduction part in sequence along the direction from the notch to the bottom of the slot itself. 48.
  • the slot widths of the first slot 38 and the second slot 39 are gradually reduced at the first narrowing portion 46 along the direction from the slot opening to the bottom of the slot.
  • the slot width of the first slot 38 and the slot width of the second slot 39 is consistent with that of the equal-diameter portion 47, while the slot width of the first slot 38 and the slot width of the second slot 39 is along the notch to the bottom of the slot.
  • the direction gradually decreases toward the second constricted portion 48 .
  • the shapes of the first socket 40 and the second socket 41 match the shapes of the first slot 38 and the second slot 39 . Since the groove width of the first slot 38 and the second slot 39 is gradually reduced at the second constriction portion 48 along the direction from the notch to the bottom of the slot, the shape of the first socket 40 and the second socket 41 is similar to that of the socket.
  • the shapes of the slots are consistent, so the head ends of the first plug-in piece 40 and the second plug-in piece 41 also present a pointed shape, and because the slot width of the two slots is in the direction from the notch to the bottom of the slot at the first constricted portion 46 is gradually reduced to facilitate the insertion of the first plug connector 40 and the second plug connector 41 .
  • the connecting plate 33 is further provided with a fixed slider 50
  • the above-mentioned base 1 is provided with a guide chute 49
  • the fixed slider 50 is located in the guide chute 49 .
  • the seat part 2 is the first supporting part 2a in the power switching device
  • the footrest 4 is the second supporting part 4a in the power switching device.
  • the base 1 and the driving assembly mentioned above are the same base 1 and driving assembly.
  • the worm gear 30 a and the worm 31 a in the driving assembly are the worm gear 30 and the worm 31 of the seat.
  • the above-mentioned first screw mandrel is the first seat screw mandrel 8 .
  • the second screw rod in the power switching device is the transmission screw rod 60 .
  • the driving screw rod 60 is connected with the above-mentioned footrest worm 25 through a universal hose.
  • the first fixing part 36 a on the first seat part screw rod 8 is the seat part fixing part 36
  • the first pushing part 34 a on the first seat part screw rod 8 is the seat part pushing part 34 .
  • the second fixing part 37 a on the driving screw rod 60 is the fixed connecting part 37
  • the second pushing part 35 a on the driving screw rod 60 is the driving pushing part 35 .
  • the first seat screw 8 is inserted into the insertion hole 42 and mated with the seat worm gear 30 .
  • the driving motor 32 drives the seat worm 31 to rotate
  • the seat worm 31 drives the seat worm wheel 30 to rotate.
  • the seat worm wheel 30 drives the first seat screw 8 to rotate around its own axis.
  • the first seat screw rod 8 drives the first connecting member 10 to move from the tail end of the first seat screw rod 8 to the head end.
  • the first connecting member 10 drives the seat member 2 to rise from the sitting position (first position) to the lying position (second position). Since the first seat screw 8 is connected to the second seat screw 9 through the universal joint 12, the first seat screw 8 rotates while driving the second seat screw 9 to rotate.
  • the first connecting part 10 While the seating part 2 is rising, the first connecting part 10 also drives the seating part pushing part 34 to move to the head end of the first seating part screw rod 8 together.
  • the seat part pushing part 34 When the seat part 2 rises to the lying position, the seat part pushing part 34 is against the end surface of the seat part worm wheel 30 and pushes the seat part worm wheel 30 to separate from the seat part fixing part 36 on the first seat part screw rod 8 .
  • the seat worm gear 30 drives the connected drive motor 32 to move from the first drive position to the second drive position through the connecting plate 33 .
  • the fixed connector 37 on the transmission screw rod 60 is inserted into the socket 42 to be plugged and matched with the seat worm wheel 30 .
  • the drive motor 32 continues to drive the seat worm 31 to rotate to drive the seat worm wheel 30 to rotate.
  • the seat worm wheel 30 drives the transmission screw 60 to rotate synchronously, and the transmission screw 60 drives the connected footrest worm 25 to rotate through the universal flexible shaft 61, so that the footrest 4 rotates from the folded position (the third position) to the unfolded position (the third position) four positions).
  • the sofa is switched from the sitting state to the lying state.
  • the drive motor 32 drives the seat worm wheel 30 to rotate in reverse through the seat worm 31, the seat worm wheel 30 drives the connected drive screw 60 to rotate in reverse, and the drive screw 60 drives the connected footrest worm 25 to rotate through the universal flexible shaft 61 , so that the footrest 4 rotates from the expanded position (the fourth position) to the retracted position (the third position).
  • the driving pushing member 35 is driven to move towards the tail end of the driving screw rod 60 .
  • the transmission pushing member 35 is against the connecting plate 33 at the rear end of the seat worm wheel 30 , and pushes the seat worm wheel 30 to separate from the fixed connecting member 37 on the drive screw 60 .
  • the seat worm gear 30 and the driving motor 32 retreat from the second driving position to the first driving position, and the seat worm gear 30 is plugged and matched with the first seat screw 8 again.
  • the driving motor 32 continues to rotate in reverse, driving the first seat screw 8 and the second seat screw 9 to rotate in reverse, so that the first connecting piece 10 and the second connecting piece 11 can move in the opposite direction, forcing the seat 2 descend to the seating position, and the backrest 3 turns to the leaning position.
  • the sofa is switched from the lying state to the sitting state.
  • a fixed seat 59 is provided on the side end surface adjacent to the footrest 4 on the base 1, and the fixed connector 37 is fixedly installed on the fixed seat 59, and the fixed seat 59 A cavity is provided inside, and the drive screw 60 is placed in the cavity, and the end of the drive screw 60 away from the fixed connector 37 passes through the side wall of the fixing seat 59 and is connected with the universal flexible shaft 61 .
  • the footrest 4 in this solution includes a first footrest 54 and a second footrest 64 .
  • the footrest worm 25 is arranged on the second footrest 64 so that the second footrest 64 is rotatably connected with the base 1 .
  • the first footrest 54 is slidably disposed on the second footrest 64 .
  • the second footrest 64 rotates and expands relative to the base 1
  • the first footrest 54 can slide and extend relative to the second footrest 64 .
  • the first footrest 54 can slide and shrink relative to the second footrest 64 .
  • the second footrest 64 is provided with a footrest screw 51 , the footrest screw 51 is screwed with a transmission member 53 , and the transmission member 53 is connected with the first footrest 54 ,
  • the footrest screw rod 51 is in transmission connection with the above-mentioned footrest worm 25 .
  • the tail end of the footrest screw 51 is connected to the footrest worm 25 through a helical gear 52 .
  • the transmission effect of the transmission of the helical gear 52 is relatively good, the transmission is stable, and the noise is small.
  • the bearing capacity of the helical gear 52 transmission mechanism is relatively good.
  • the footrest worm 25 When the footrest worm 25 rotates to make the second footrest 64 unfold relative to the base 1 , the footrest worm 25 drives the footrest screw 51 to rotate synchronously through the helical gear 52 . When the footrest screw 51 rotates, it will drive the connected transmission part 53 to move along the length direction of the footrest screw 51 . The transmission member 53 will drive the second footrest 64 to slide and unfold relative to the second footrest 64 .
  • the footrest worm 25 rotates so that the second footrest 64 is retracted relative to the base 1
  • the footrest worm 25 drives the footrest screw 51 to rotate synchronously, so that the transmission member 53 reverses along the length direction of the footrest 51.
  • the first footrest 54 is forced to slide and contract relative to the second footrest 64 .
  • the footrest screw 51 and the first footrest 54 are respectively located on opposite ends of the second footrest 64, and the second footrest 64 is provided with a sliding groove 55 penetrating through its two ends.
  • the sliding slot 55 extends along the length direction of the footrest screw 51
  • the transmission member 53 is provided with a guide block 54 , which passes through the sliding slot 55 and is connected to the first footrest 54 . While the transmission member 53 is moving, the guide block 54 drives the first footrest 54 to slide and extend or shrink relative to the second footrest 64 . And while moving, the guide block 54 also cooperates with the sliding channel 55 to play a guiding role.
  • the transmission part 53 is provided with a guide groove 56
  • the first footrest 54 is provided with a guide protrusion 57
  • the guide protrusion 57 extends along the length direction of the footrest screw 51
  • the guide protrusion 57 is located on the guide groove 56.
  • a certain guiding effect is also played by the guide groove 56 and the guide protrusion.
  • a plurality of convex lines 58 are arranged on the surface of the second footrest 64 , and the surface of the first footrest 54 is against the convex lines 58 .
  • the contact area between the first footrest 54 and the second footrest 64 is reduced by the convex strip 58, thereby reducing the friction force when the first footrest 54 slides relative to the second footrest 64, and facilitating the sliding of the first footrest 54 .

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

一种坐具单元及坐具，包括基座（1）；坐部传动机构，设置于基座（1）上并连接有承坐件（2）和背靠件（3）；搁脚传动机构，设置于基座（1）上并连接有搁脚板（4）；驱动组件，可移动设置于基座（1）上，驱动组件可相对于基座（1）于第一驱动位置和第二驱动位置之间移动；驱动组件移动至第一驱动位置时，驱动组件与坐部传动机构连接并可带动承坐件（2）相对于基座（1）上升或下降；基座（1）上升时，坐部传动机构带动背靠件（3）转动至后仰位置；基座（1）下降时，坐部传动机构带动背靠件（3）转动至承靠位置；驱动组件移动至第二驱动位置时，驱动组件与搁脚传动机构连接并带动搁脚板（4）相对于基座（1）于转动展开或收拢。只要一个驱动组件就可驱动承坐件（2）、背靠件（3）和搁脚板（4）相对于基座（1）移动，以实现于承坐与躺卧状态的切换。

Description

一种坐具单元及坐具 技术领域
本发明涉及家具技术领域，特别涉及一种坐具单元及坐具。
 背景技术
“沙发”为一种装有软垫的单座位或多座位椅子；装有弹簧或厚泡沫塑料等的靠背椅，两边有扶手，是软装家具的一种。
传统的沙发结构通常较为固定，在实际使用时不能根据实际的使用需要进行灵活的调节，导致使用的舒适程度和灵活性较差，不能很好的满足日常使用需要。现有的沙发就出现了可以对沙发基座上的坐垫进行升降，且坐垫升降的同时还可以对背靠进行转动从而实现沙发承坐状态与躺卧状态的切换的承坐结构。且现有的沙发还会在沙发基座上加设有搁脚板，可以对搁脚板进行翻转以此来满足用户脚部搁放的使用需要。但是现有可升降调节的沙发中坐垫、背靠和搁脚板通常需要通过两个甚至三个不同的驱动组件来实现驱动，其结构复杂，生产成本相对较高。
 技术解决方案
本发明克服了上述现有技术中所存在的不足，提供了一种通过同一个驱动组件就可以驱动承坐件、背靠件和搁脚板相对于基座移动，以实现于承坐状态与躺卧状态的切换的沙发。
本发明的技术方案是这样实现的：
一种坐具单元，包括基座；
坐部传动机构，设置于所述基座上；
搁脚传动机构，设置于所述基座上；
承坐件，位于所述基座的上方并与所述坐部传动机构连接；
背靠件，与所述坐部传动机构连接，且所述背靠件可相对于基座于承靠位置和后仰位置之间转动；
搁脚板，与所述搁脚传动机构连接，且所述搁脚板可相对于基座于展开位置和收拢位置之间转动；
驱动组件，可移动设置于所述基座上，所述驱动组件可相对于基座于第一驱动位置和第二驱动位置之间移动；所述驱动组件移动至第一驱动位置时，所述驱动组件与所述坐部传动机构连接，所述驱动组件可通过坐部传动机构带动所述承坐件相对于基座上升或下降；所述基座上升时，所述坐部传动机构带动所述背靠件同步转动至后仰位置；所述基座下降时，所述坐部传动机构带动所述背靠件同步转动至承靠位置；所述驱动组件移动至第二驱动位置时，所述驱动组件与所述搁脚传动机构连接，所述驱动组件可通过搁脚传动机构带动搁脚板相对于基座转动。
在进一步的方案中，所述坐部传动机构包括坐部丝杆，所述坐部丝杆上螺纹配合有第一连接件和第二连接件，所述第一连接件与所述承坐件连接；所述驱动组件位于第一驱动位置时，所述驱动组件与所述坐部丝杆相连并可驱动所述坐部丝杆绕自身轴线转动；所述驱动组件驱动所述坐部丝杆转动时，所述坐部丝杆带动第一连接件及承坐件沿坐部丝杆的长度方向移动，迫使承坐件相对于所述基座上升或下降；所述背靠件与所述第二连接件铰接，所述背靠件可相对于第二连接件转动以在承靠位置和后仰位置之间切换。
通过驱动组件驱动坐部丝杆转动以带动第一连接件及第二连接件沿坐部丝杆长度方向移动。只需要一个驱动组件就可带动承坐件相对于所述基座上升或下降，且承坐件移动的同时，背靠件同步运动以在承靠位置和后仰位置之间切换。
在进一步的方案中，所述坐部丝杆包括第一坐部丝杆，所述基座与第一坐部丝杆均沿自身长度方向具有头端与尾端，所述第一坐部丝杆的头端与所述基座的头端相邻，所述第一坐部丝杆沿基座的长度方向延伸，且所述第一坐部丝杆与水平面之间呈夹角设置，所述驱动组件与所述第一坐部丝杆相连，所述驱动组件驱动第一坐部丝杆转动时，所述第一坐部丝杆带动第一连接件及承坐件沿第一坐部丝杆的长度方向移动，以使得承坐件相对于所述基座上升或下降。
由于第一坐部丝杆沿基座的长度方向由自身尾端至头端方向倾斜向上延伸，只需要驱动第一坐部丝杆转动，就可以带动第一连接件及承坐件沿第一坐部丝杆的长度方向移动，以使得承坐件相对于所述基座上升或下降，结构简单，操作方便。
在进一步的方案中，所述坐部丝杆还包括第二坐部丝杆，所述第二坐部丝杆沿自身长度方向具有头端与尾端，所述第一坐部丝杆的尾端通过万向接头与第二坐部丝杆的头端连接，所述第二坐部丝杆沿基座的长度方向延伸，且第二坐部丝杆与水平面之间的夹角大小小于第一坐部丝杆与水平面之间的夹角大小；所述第一坐部丝杆转动时带动所述第二坐部丝杆转动，以使得第二连接件沿第二坐部丝杆长度方向移动，迫使背靠件在承靠位置和后仰位置之间切换。
由于坐部丝杆还包括第二坐部丝杆，第一坐部丝杆的尾端通过万向接头与第二坐部丝杆的头端连接，第一坐部丝杆转动时就可以带动第二坐部丝杆同步转动。
且与第一坐部丝杆不同的，第二坐部丝杆沿基座的长度方向由自身尾端至头端方向水平延伸，若第二坐部丝杆与第一坐部丝杆是处于同一直线上倾斜向上的，为了容纳第二坐部丝杆，那么基座的整体高度就需要很高，就会加大生产成本。而第二坐部丝杆与水平面之间的夹角缩小，就大幅缩小了基座的整体高度，减少了生产成本。
在进一步的方案中，所述搁脚传动机构包括传动丝杆，所述传动丝杆设置于所述基座上并可绕自身轴线转动，所述传动丝杆与所述搁脚板连接；所述驱动组件上连接有转动件，所述转动件可在驱动组件的作用下绕自身轴心转动；且所述驱动组件移动至第一驱动位置时，所述转动件与所述第一坐部丝杆同轴心插接配合以带动所述第一坐部丝杆同步转动；所述驱动组件移动至第二驱动位置时，所述转动件与所述传动丝杆同轴心插接配合以带动所述传动丝杆同步转动，所述传动丝杆转动时，所述传动丝杆带动所述搁脚板相对于基座于展开位置和收拢位置之间转动。
在进一步的方案中，所述搁脚传动机构还包括搁脚蜗轮和搁脚蜗杆，所述搁脚蜗轮与所述基座保持相对固定，所述搁脚蜗杆设置于所述搁脚板上并与所述搁脚蜗轮咬合，所述搁脚蜗杆可相对于所述搁脚板绕自身轴线转动；且所述搁脚蜗杆通过万向软轴与所述传动丝杆相连；所述传动丝杆转动时，通过万向软轴带动所述搁脚蜗杆同步转动，所述搁脚蜗杆带动所述搁脚板绕所述搁脚蜗轮的圆心转动，以使得搁脚板相对于所述基座于展开位置和收拢位置之间转动。
该结构采用蜗轮蜗杆机构来驱动搁脚板转动，蜗轮蜗杆机构为多齿啮合传动，其传动平稳、噪音很小。且机构存在自锁性，结构更加安全。
在进一步的方案中，所述搁脚板包括第一搁脚板与第二搁脚板，所述第二搁脚板与所述基座可转动连接，所述第二搁脚板上设置有搁脚丝杆，所述搁脚丝杆上螺纹连接有传动件，所述传动件与所述第一搁脚板相连，所述搁脚丝杆与所述搁脚蜗杆传动连接；所述第二搁脚板相对于所述基座展开时，所述搁脚蜗杆带动搁脚丝杆同步转动，使得传动件沿搁脚丝杆的长度方向移动，迫使第一搁脚板相对于第二搁脚板滑动延展；所述第二搁脚板相对于所述基座收拢时，所述搁脚蜗杆带动搁脚丝杆同步转动，使得传动件沿搁脚丝杆的长度方向反向移动，迫使第一搁脚板相对于第二搁脚板滑动收缩。
由于搁脚蜗轮固定设置于基座上，而搁脚蜗杆设置于搁脚板上，搁脚蜗杆可以随着搁脚板同步移动。而由于搁脚蜗杆可以随着搁脚板同步移动，搁脚蜗杆才可以与搁脚丝杆传动连接，以驱动搁脚丝杆转动，从而带动搁脚丝杆上的传动件移动来迫使搁脚板中的第一搁脚板相对于搁脚板中的第二搁脚板滑动延展或滑动收缩。
在进一步的方案中，所述驱动组件包括驱动电机，所述驱动电机的输出轴上连接有坐部蜗杆，且所述驱动电机上设置有连接板，所述转动件为坐部蜗轮，所述坐部蜗轮可转动设置于所述连接板上，所述坐部蜗轮与坐部蜗杆相配合，使得所述驱动电机可带动所述坐部蜗轮绕自身轴心转动，且所述坐部蜗轮同轴心设有插孔，所述驱动组件移动至第一驱动位置时，所述第一坐部丝杆插于所述插孔内插接配合；所述驱动组件移动至第二驱动位置时，所述传动丝杆插于所述插孔内插接配合。
在进一步的方案中，所述第一连接件上设置有坐部推抵件，所述坐部丝杆转动以带动所述承坐件上升至行程终点的过程中，所述坐部推抵件与所述坐部蜗轮相抵并带动坐部蜗轮移动，以使得所述坐部蜗轮及驱动组件由第一驱动位置移动至第二驱动位置。
驱动电机经由坐部推抵件推动自动从第一驱动位置移动至第二驱动位置，方便快捷。
在进一步的方案中，所述传动丝杆上连接有传动推抵件，所述传动丝杆转动以驱动搁脚板相对于基座于展开位置转动至收拢位置时，所述传动推抵件与所述坐部蜗轮相抵并带动坐部蜗轮移动，以使得所述坐部蜗轮及驱动组件由第二驱动位置移动至第一驱动位置。
驱动电机经由传动推抵件推动自动从第二驱动位置移动至第一驱动位置，方便快捷。
在进一步的方案中，所述第一坐部丝杆的头端设置有坐部固定件，所述传动丝杆的尾端设置有固定连接件，所述坐部蜗轮上设置有插孔；所述驱动组件位于第一驱动位置时，所述坐部固定件插于所述插孔内插接配合；所述驱动组件位于第二驱动位置时，所述固定连接件插于所述插孔内插接配合。
在进一步的方案中，所述坐部固定件的外环壁上于远离坐部丝杆的一端绕自身周向设置有多个第一插槽，所述固定连接件的外环壁上于远离传动丝杆的一端绕自身周向设置有多个第二插槽，所述插孔内设置有第一插接件和第二插接件，驱动组件位于第一驱动位置时，所述坐部固定件插于所述插孔内，所述第一插接件与第一插槽插接配合；所述驱动组件位于第二驱动位置时，所述固定连接件插于所述插孔内，所述第二插接件与第二插槽插接配合。
通过第一插槽与第一插接件的配合，驱动组件位于第一驱动位置时，坐部固定件与坐部蜗轮的连接方式为键连接，从而保持坐部蜗轮与坐部丝杆同步转动。通过第二插槽与第二插接件的配合，驱动组件位于第二驱动位置时，固定连接件与坐部蜗轮的连接方式为键连接，从而保持坐部蜗轮与传动丝杆同步转动。
在进一步的方案中，所述第一插槽与第二插槽均沿自身槽口至槽底方向依次分为第一径缩部、等径部和第二径缩部，所述第一插槽与第二插槽的槽宽沿槽口至槽底方向于第一径缩部逐渐缩小，所述第一插槽与第二插槽的槽宽于等径部保持一致，所述第一插槽与第二插槽的槽宽沿槽口至槽底方向于第二径缩部逐渐缩小；所述第一插接件与第二插接件的外形与所述第一插槽和第二插槽的形状相匹配。
由于插槽的槽宽沿槽口至槽底方向于第二径缩部逐渐缩小，而插接件的外形与所述插槽的形状一致，那么插接件的头端也是呈现尖角状，而由于插槽的槽宽沿槽口至槽底方向于第一径缩部逐渐缩小，就可以便于插接件的插入。
在进一步的方案中，所述基座的数量为两个，两个基座镜像设置并朝同一方向延伸，且其中一个基座上未设有所述驱动组件、搁脚驱动机构和搁脚板，两个基座上的坐部丝杆通过传动连接件传动连接。
两个基座上的坐部丝杆通过传动连接件传动连接，而不是通过两个驱动组件分开驱动，就可以避免两个坐部丝杆转动的速度或是圈数不一致导致两个基座上的承坐件上升的高度不一致而导致沙发歪斜的情况。
一种坐具，包括上述坐具单元。
 有益效果
1、通过同一个驱动组件于相对于基座于第一驱动位置和第二驱动位置之间移动，从而分别带动坐部传动机构和搁脚传动机构两个传动机构运动。
当驱动组件位于第一驱动位置时可以通过坐部传动机构带动承坐件与背靠件同时动作。且当驱动组件位于第二驱动位置时可以通过搁脚传动机构带动搁脚板转动。只需要一个驱动组件就可以完成沙发中承坐件、背靠件和搁脚板三个支撑部件的位置调节，减少了驱动组件的数量，减少了生产成本，也精简了设备结构。
2、坐部传动机构包括第一坐部丝杆和第二坐部丝杆，承坐件连接于第一坐部丝杆上，背靠件连接于第二坐部丝杆上。由于第一坐部丝杆与第二坐部丝杆之间通过万向接头连接，就可以实现第一坐部丝杆和第二坐部丝杆同步转动的，达到同时调节承坐件与背靠件的目的。且与第一坐部丝杆不同的，第二坐部丝杆沿基座的长度方向由自身尾端至头端方向水平延伸，若第二坐部丝杆与第一坐部丝杆是处于同一直线上倾斜向上的，为了容纳第二坐部丝杆，那么基座的整体高度就需要很高，就会加大生产成本。而第二坐部丝杆与水平面之间的夹角缩小，就大幅缩小了基座的整体高度，减少了生产成本。
 附图说明
图1为实施例中坐具单元的结构示意图及结构放大图；
图2为图1中A部分的放大图；
图3为实施例中沙发伸展单元的侧视图；
图4为沙发除去一侧基座后的结构示意图及结构放大图；
图5为坐部蜗轮及蜗轮连接件的结构示意图；
图6为另一个视角下坐部蜗轮及蜗轮连接件的结构示意图；
图7为实施例中沙发的正视图；
图8为图7中A-A的剖视图；
图9为图8中B部分的放大图；
图10为搁脚驱动机构的结构示意图；
图11为另一个视角下沙发的结构示意图及结构放大图；
图12为沙发除去一个沙发伸展单元后的结构示意图及放大图；
图13为坐部固定件的结构示意图。
各附图标记为：1-基座，2-承坐件，3-背靠件，4-搁脚板，5-第一搁脚板，6-第二搁脚板，7-坐部丝杆，8-第一坐部丝杆，9-第二坐部丝杆，10-第一连接件，11-第二连接件，12-万向接头，13-承坐滑槽，14-承坐滑块，15-限位凸条，16-限位凹槽，17-第一背靠滑槽，18-第二背靠滑槽，19-第一背靠滑块，20-第二背靠滑块，21-传动杆，22-第一斜齿轮，23-第二斜齿轮，24-搁脚蜗轮，25-搁脚蜗杆，26-连接块，27-卡槽，28-螺纹段，29-台阶轴，8a-第一传动杆，2a-第一支撑部件，4a-第二支撑部件，30-坐部蜗轮，31-坐部蜗杆，30a-蜗轮，31a-蜗杆，32-驱动电机，33-连接板，34-坐部推抵件，35-传动推抵件，34a-第一推抵件，35a-第二推抵件，36-坐部固定件，37-固定连接件，36a-第一固定件，37a-第二固定件，38-第一插槽，39-第二插槽，40-第一插接件，41-第二插接件，42-插孔，43-蜗轮连接件，44-凸台，45-盖板，46-第一径缩部，47-等径部，48-第二径缩部，49-导向滑槽，50-固定滑块，51-搁脚丝杆，52-斜齿轮，53-传动件，54-导向块，55-滑动通槽，56-导向凹槽，57-导向凸起，58-凸条，59-固定座，60-传动丝杆，60a-第二传动杆，61-万向软轴。
 本发明的实施方式
实施例：如图1-13所示，本发明提供了一种坐具单元，该坐具单元特别应用于沙发，其包括两个沙发伸展单元。每个沙发伸展单元均包括一个基座1，两个沙发伸展单元中的基座1镜像设置并朝同一方向延伸。
请参阅图1和图4，两个基座1上均设置有坐部传动机构，坐部传动机构包括坐部丝杆7。坐部丝杆7与基座1均沿沿自身长度方向具有头端与尾端，坐部丝杆7的头端与基座1的头端相邻。且坐部丝杆7上沿自身头端至尾端方向依次螺纹配合有第一连接件10与第二连接件11。每个沙发伸展单元中还包括承坐件2与背靠件3，其中承坐件2位于基座1的上方并与上述第一连接件10固定连接，两个沙发支承单元中的承坐件2相正对的两侧内壁之间通过连接板件连接以构成坐框。背靠件3位于基座1的尾端并与上述第二连接件11相铰接。
在本方案中，其中一个基座1上还设置有驱动组件，驱动组件与上述坐部丝杆7相连以驱动坐部丝杆7绕自身轴线转动。
而坐部丝杆7转动的同时，坐部丝杆7就会带动第一连接件10及第二连接件11沿坐部丝杆7的长度方向移动。
在本方案中，如图4所示，坐部丝杆7包括第一坐部丝杆8与第二坐部丝杆9，第一坐部丝杆8与第二坐部丝杆9均沿自身长度方向具有头端与尾端。其中第一坐部丝杆8的头端与基座1的头端相邻，上述驱动组件与第一坐部丝杆8的头端连接。而第一坐部丝杆8的尾端则通过万向接头12与第二坐部丝杆9的头端连接，以带动第二坐部丝杆9同步转动。上述第一连接件10与该第一坐部丝杆8螺纹配合，第二连接件11与第二坐部丝杆9螺纹配合。
第一坐部丝杆8沿基座1的长度方向延伸，且第一坐部丝杆8与水平面之间呈夹角设置。具体的，本方案中第一坐部丝杆8由自身尾端至头端方向倾斜向上延伸。在驱动电机32带动第一坐部丝杆8转动时，第一坐部丝杆8带动第一连接件10沿第一坐部丝杆8的长度方向移动。当第一连接件10由第一坐部丝杆8的尾端向第一坐部丝杆8的头端移动时，由于第一坐部丝杆8由自身尾端至头端方向倾斜向上延伸，就会带动第一连接件10于竖直方向上做上升动作，就会带动承坐件2相对于基座1上升。反之，当驱动电机32反向转动，使得第一连接件10由第一坐部丝杆8的头端向第一坐部丝杆8的尾端移动时，就会带动承坐件2相对于基座1下降。
而由于第一坐部丝杆8的尾端则通过万向接头12与第二坐部丝杆9的头端连接，当在驱动电机32带动第一坐部丝杆8转动，第一坐部丝杆8带动第一连接件10沿第一坐部丝杆8的长度方向移动时。第二坐部丝杆9就会同步转动以带动第二连接件11由第二坐部丝杆9的尾端向第二坐部丝杆9的头端进给，从而带动背靠件3相对于第二连接件11转动，使得背靠件3在承坐件2上升的过程中同步向后倾倒以由承靠位置切换至后仰位置。反之，当驱动组件驱动第一坐部丝杆8反向转动，使得第一连接件10由第一坐部丝杆8的头端向第一坐部丝杆8的尾端移动时，第二坐部丝杆9就会同步转动以带动第二连接件11由第二坐部丝杆9的头端向第二坐部丝杆9的尾端进给，从而带动背靠件3相对于第二连接件11转动，使得背靠件3在承坐件2下降的过程中同步复位以由后仰位置切换至承靠位置。
且作为一种较优的实施方式，如图8所示，基座1上设置有若干个承坐滑槽13，承坐滑槽13的延伸方向与第一坐部丝杆8的延伸方向相同。第一连接件10上设置有多个承坐滑块14，承坐滑块14与所述承坐滑槽13数量相同并一一对应，承坐滑块14可滑动设置于对应的承坐滑槽13内，且承坐滑块14沿承坐滑槽13的槽深方向与所述基座1相对固定。具体的，如图12所示，承坐滑槽13的槽壁上设置有沿自身长度方向延伸的限位凸条15，而承坐滑块14的外壁上设置有限位凹槽16，限位凸条15卡于限位凹槽16内，从而使得承坐滑块14沿承坐滑槽13的槽深方向与基座1相对固定，而又不影响承坐滑块14于承坐滑槽13内的滑动。第一坐部丝杆8转动以带动第一连接件10移动时，承坐滑块14于承坐滑槽13内移动，以对第一连接件10的移动起到导向作用。
而为了对背靠件3的转动起到导向作用。基座1上还设置有第一背靠滑槽17与第二背靠滑槽18，第一背靠滑槽17内可滑动设置有第一背靠滑块19，第二背靠滑槽18内设置有第二背靠滑块20。其中第一背靠滑块19与背靠件3铰接，第二背靠滑块20与第二连接件11连接，第二背靠滑槽18的延伸方向与第二坐部丝杆9的延伸方向相同。而第一背靠滑槽17沿自身长度方向具有头端与尾端，第一背靠滑槽17沿自身尾端至头端方向逐渐靠近第二坐部丝杆9。与承坐滑块14相同的，第一背靠滑块19与第二背靠滑块20均沿第一背靠滑槽17的槽深方向与基座1相对固定。
且与承坐滑块14及承坐滑槽13相同的，第一背靠滑槽17与第二背靠滑槽18内也设置有限位凸条15，第一背靠滑块19和第二背靠滑块20的的外壁上设置有限位凹槽16，限位凸条15插于对应的限位凹槽16内滑动配合。
在本方案中，如图2所示，第一坐部丝杆8与第二坐部丝杆9并非处于同一条直线上。第二坐部丝杆9与水平面之间的夹角大小小于第一坐部丝杆8与水平面之间的夹角大小。作为一种较优的实施方式，第二坐部丝杆9沿基座1的长度方向由自身尾端至头端方向水平延伸。若第二坐部丝杆9与第一坐部丝杆8一样是与水平面呈夹角设置的，为了容纳第二坐部丝杆9，那么基座1的整体高度就需要很高，就会加大生产成本。而第二坐部丝杆9沿基座1的长度方向由自身尾端至头端方向水平延伸，就大幅缩小了基座1的整体高度，减少了生产成本。当然的，在满足生产需求时，第二坐部丝杆9与水平面之间也不一定要完全平行，也可以带有些许的夹角。
另外，在本方案中，第一坐部丝杆8上螺纹的螺距要小于第二坐部丝杆9上螺纹的螺距。由于是同一个驱动组件驱动第一坐部连杆及第二坐部连杆同步转动的，那么第一坐部连杆及第二坐部连杆的转动圈数都是相同的。而为了避免在角度调节的过程种出现夹腰搓背的问题，第一坐部丝杆8上螺纹的螺距小于所述第二坐部丝杆9上螺纹的螺距，那么转动同样的圈数时，第二连接件11移动的距离就会大于第一连接件10移动的距离，就会使得背靠件3转动的速度快于承坐件2升降的速度，就可以避免在角度调节的过程种出现夹腰搓背的问题。
且由于本方案中，仅有一个基座1上设置有驱动组件。为了保证另一个基座1上坐部丝杆7的同步转动，如图1所示，两个基座1上的坐部丝杆7通过传动连接件传动连接。具体的，传动连接件包括传动杆21，传动杆21的两端均设置有第一斜齿轮22，两个基座1上的坐部丝杆7的尾端均设置有第二斜齿轮23。传动杆21两端的第一斜齿轮22分别与两个基座1上的坐部丝杆7尾端的第二斜齿轮23咬合以实现传动。两个基座1上的坐部丝杆7通过斜齿轮52及传动杆21传动连接，而不是通过两个驱动组件分开驱动，就可以避免两个坐部丝杆7转动的速度或是圈数不一致导致两个基座1上的承坐件2上升的高度不一致，导致沙发歪斜。
同时，本方案中设置有驱动组件的基座上设置有搁脚传动机构，该搁脚传动机构连接有搁脚板4，搁脚板4与基座1可转动连接并可相对于基座1展开或收拢。具体的，请参阅图8-11，基座1所连的坐框上设置有搁脚蜗轮24，而搁脚板4上则设置有搁脚蜗杆25，搁脚蜗杆25与搁脚蜗轮24咬合，且该搁脚蜗杆25可绕自身轴线相对于搁脚板4转动。当搁脚蜗杆25与上述驱动组件连接时，驱动组件了驱动搁脚蜗杆25转动，搁脚蜗杆25就会带动搁脚板4绕搁脚蜗轮24的圆心转动，以使得搁脚板4相对于坐框及基座1展开或收拢。
而为了避免搁脚蜗杆25从搁脚板4上脱离。搁脚板4上设置有连接块26，该连接块26与基座1可转动连接。具体的，该连接块26的两侧设置有向上延伸的凸耳，两侧凸耳均通过转动轴与搁脚蜗轮24转动连接，从而使得该连接块26与基座1可转动连接。
如图10所示，连接块26上还设置有卡槽27，卡槽27的槽底与搁脚蜗轮24的轮壁正对。搁脚蜗杆25包括设置有螺旋纹的螺纹段28，螺纹段28的两端设置有台阶轴29，螺纹段28两端的台阶轴29均贯穿卡槽27的槽壁露出于连接块26外，且螺纹段28与台阶轴29之间的台阶面与卡槽27的内壁相抵。通过在搁脚板4上的连接块26上设置有卡槽27，搁脚蜗杆25上的螺纹段28两端的台阶轴29均贯穿所述卡槽27的槽壁露出于所述连接块26外，所述螺纹段28与台阶轴29之间的台阶面与卡槽27的内壁相抵，搁脚螺杆就只能相对于连接板33及搁脚板4绕自身轴线转动，在其他方向上对搁脚螺杆实现限位，避免搁脚螺杆从搁脚板4上脱离。
而为了使得搁脚蜗杆25可与上述驱动组件连接，本方案中还引入了动力切换装置。
动力切换装置包括基座1和驱动组件，基座1上设置有第一传动杆8a和第二传动杆60a，第一传动杆8a和第二传动杆60a均可绕自身轴线转动。且第一传动杆8a上连接有第一支撑部件2a，第二传动杆60a上连接有第二支撑部件4a。
驱动组件可移动设置于基座1上，驱动组件可相对于基座1于第一驱动位置和第二驱动位置之间移动。驱动组件上还连接有转动件，转动件可在驱动组件的作用下绕自身轴心转动。
当驱动组件移动至第一驱动位置时，驱动组件带动转动件同步移动，使得转动件与第一传动杆8a同轴心插接配合以带动第一传动杆8a同步转动，第一传动杆8a转动时可带动第一支撑部件2a相对于基座1于第一位置和第二位置之间来回运动。
当驱动组件移动至第一驱动位置时，驱动组件带动转动件同步移动，使得转动件与第二传动杆60a同轴心插接配合以带动第二传动杆60a同步转动，第二传动杆60a转动时可带动第二支撑部件4a相对于基座1于第三位置和第四位置之间来回运动。
如图2所示，驱动组件包括驱动电机32，驱动电机32的输出轴上连接有蜗杆31a。上述转动件为蜗轮30a，为了使得转动件及蜗轮30a可以与驱动电机32同步移动，本方案中于驱动电机32上设置有向上弯折延伸的连接板33，蜗轮30a可转动设置于该连接板33上。具体的，如图4所示，驱动组件还包括蜗轮连接件43，蜗轮连接件43沿自身长度方向具有前端与后端。蜗轮连接件43的前端与所述蜗轮30a的一侧端面连接，蜗轮连接件43的后端设置有凸台44。且连接板33上设置有通孔，蜗轮连接件43后端的凸台44穿过该通孔并盖有盖板45，盖板45配合与蜗轮连接件43于连接板33两端面形成限位，使得蜗轮30a仅可相对于连接板33绕自身轴线转动。
且作为一种较优的实施方式，该动力切换装置中的第一传动杆8a为第一丝杆，第一丝杆上连接有第一推抵件34a。当第一丝杆转动以带动第一支撑部件2a相对于所述基座1由第一位置移动至第二位置时，第一推抵件34a沿第一丝杆的长度方向移动并与蜗轮30a相抵，以推动蜗轮30a及驱动电机32由第一驱动位置移动至第二驱动位置，蜗轮30a移动至第二驱动位置时自动与第二传动杆60a插接配合，实现动力切换。
同样的，该动力切换装置中的第二传动杆60a为第二丝杆，第二丝杆上连接有第二推抵件35a，第二传动杆60a转动带动所述第二支撑部件4a相对于所述基座1由第三位置移动至第四位置时，第二推抵件35a沿第二丝杆的长度方向移动并与驱动电机32上的连接板33相抵，以推动蜗轮30a及驱动组件由第二驱动位置回退至第一驱动位置，蜗轮30a重新与第一丝杆插接配合，实现动力切换。
容易理解的，虽然上述结构中第一推抵件34a是与蜗轮30a相抵，第二推抵件35a与连接板33相抵，但是当蜗轮30a及蜗轮连接件43调换位置后，也可以是第一推抵件34a与连接板33相抵，第二推抵件35a与蜗轮30a相抵。
而为了便于与第一丝杆、第二丝杆插接配合。如图5和图6所示，该蜗轮30a上还设置有插孔42，该插孔42依次贯穿所述蜗轮30a、盖板45、凸台44和蜗轮连接件43。且为了保证第一丝杆、第二丝杆插于插孔42内时可随着蜗轮30a同步转动。第一丝杆的一端设置有第一固定件36a，所述第二丝杆的一端设置有第二固定件37a。蜗轮30a与第一丝杆相连时，第一固定件36a插于所述插孔42内并与所述蜗轮30a键连接。蜗轮30a与第二丝杆相连时，第二固定件37a插于所述插孔42内并与蜗轮30a键连接。
作为一种键连接的具体实施方式，第一固定件36a的外环壁上于远离坐部丝杆7的一端绕自身周向设置有多个插槽，其为第一插槽38，第二固定件37a的外环壁上于远离第二丝杆的一端也绕自身周向设置有多个插槽，其为第二插槽39。孔内设置有插接件，插接件包括第一插接件40与第二插接件41，第一插接件40与第二插接件41朝向相反。蜗轮30a套于第一固定件36a上时，第一插接件40插于第一插槽38内以实现键连接。蜗轮30a套于第二固定件37a上时，第二插接件41插于第二插槽39内以实现键连接。
且较优的，请参阅图13，第一插槽38与第二插槽39均沿自身槽口至槽底方向依次分为第一径缩部46、等径部47和第二径缩部48，第一插槽38与第二插槽39的槽宽均沿自身槽口至槽底方向于第一径缩部46逐渐缩小。第一插槽38与第二插槽39的槽宽的槽宽于等径部47保持一致，而第一插槽38与第二插槽39的槽宽的槽宽则沿槽口至槽底方向于第二径缩部48逐渐缩小。第一插接件40和第二插接件41的外形与第一插槽38与第二插槽39的形状相匹配。由于第一插槽38和第二插槽39的槽宽沿槽口至槽底方向于第二径缩部48逐渐缩小，而第一插接件40和第二插接件41的外形与插槽的形状一致，那么第一插接件40和第二插接件41的头端也是呈现尖角状，而由于两个插槽的槽宽沿槽口至槽底方向于第一径缩部46逐渐缩小，就可以便于第一插接件40和第二插接件41的插入。
且为了保证蜗轮30a及驱动电机32可以顺畅地于第一驱动位置及第二驱动位置之间滑动。如图8所示，连接板33上还设置有固定滑块50，上述基座1上设置有导向滑槽49，固定滑块50位于所述导向滑槽49内。当驱动电机32相对于基座1于第一驱动位置和第二驱动位置之间移动时，固定滑块50于导向滑槽49内滑动，从而对驱动电机32起到导向限位的作用。
当上述动力切换装置运用于该沙发中的承坐件2与搁脚板4之间时。承坐件2即为动力切换装置中的第一支撑部件2a，而搁脚板4则是动力切换装置中的第二支撑部件4a。上述的基座1与驱动组件均为同一基座1与驱动组件。而为了区别于搁脚蜗轮24与搁脚蜗杆25，上述驱动组件中的蜗轮30a与蜗杆31a为坐部蜗轮30与坐部蜗杆31。同时上述第一丝杆即为第一坐部丝杆8。而上述动力切换装置中的第二丝杆则为传动丝杆60。该传动丝杆60通过万向软管与上述搁脚蜗杆25相连。第一坐部丝杆8上的第一固定件36a则为坐部固定件36，第一坐部丝杆8上的第一推抵件34a为坐部推抵件34。而传动丝杆60上的第二固定件37a则为固定连接件37，传动丝杆60上的第二推抵件35a为传动推抵件35。
综合上述结构，初始状态下，第一坐部丝杆8插于插孔42内与坐部蜗轮30插接配合。当驱动电机32驱动坐部蜗杆31转动时，坐部蜗杆31带动坐部蜗轮30转动。坐部蜗轮30带动第一坐部丝杆8绕自身轴线转动。第一坐部丝杆8带动第一连接件10由第一坐部丝杆8的尾端向头端移动。第一连接件10带动承坐件2由承坐位置（第一位置）上升至躺卧位置（第二位置）。由于第一坐部丝杆8通过万向接头12与第二坐部丝杆9连接，第一坐部丝杆8转动的同时带动第二坐部丝杆9转动。第二坐部丝杆9转动时就会带动第二连接件11沿第二坐部丝杆9的长度方向移动，迫使背靠件3由倚靠位置（第三位置）转动至后仰位置（第四位置）。
承坐件2上升的同时，第一连接件10还带动着坐部推抵件34一同向第一坐部丝杆8的头端移动。承坐件2上升至躺卧位置时，坐部推抵件34与坐部蜗轮30的端面相抵并推动坐部蜗轮30与第一坐部丝杆8上的坐部固定件36分离。坐部蜗轮30就通过连接板33带动相连的驱动电机32由第一驱动位置移动至第二驱动位置。
坐部蜗轮30移动至第二驱动位置时，传动丝杆60上的固定连接件37就插入插孔42内与坐部蜗轮30插接配合。驱动电机32继续驱动坐部蜗杆31转动以带动坐部蜗轮30旋转。坐部蜗轮30带动传动丝杆60同步转动，传动丝杆60通过万向软轴61带动所连搁脚蜗杆25转动，从而使得搁脚板4由收拢位置（第三位置）转动至展开位置（第四位置）。此时就完成了沙发由承坐状态至躺卧状态的切换。
当用户想要将沙发由躺卧状态切换至承坐状态时。只需要驱动驱动电机32反向转动。驱动电机32通过坐部蜗杆31带动坐部蜗轮30反向转动，坐部蜗轮30带动所连传动丝杆60反向转动，传动丝杆60通过万向软轴61带动所连搁脚蜗杆25转动，从而使得搁脚板4由展开位置（第四位置）转动至收拢位置（第三位置）。
且与此同时，传动丝杆60反向转动的过程中，带动传动推抵件35向传动丝杆60的尾端移动。搁脚板4转动至收拢位置时，传动推抵件35与坐部蜗轮30后端的连接板33相抵，并推动坐部蜗轮30与传动丝杆60上的固定连接件37分离。坐部蜗轮30及驱动电机32由第二驱动位置回退至第一驱动位置，坐部蜗轮30重新与第一坐部丝杆8插接配合。驱动电机32持续反向转动，带动第一坐部丝杆8及第二坐部丝杆9反向转动，就可以使得第一连接件10与第二连接件11反向移动，迫使承坐件2下降至承坐位置，背靠件3转动至倚靠位置。从而完成沙发由躺卧状态至承坐状态的切换。
而为了安装上述传动丝杆60。较优的，如图1所示，本方案中基座1上与搁脚板4相邻的一侧端面上设置有固定座59，固定连接件37固定安装于所固定座59上，固定座59内部设置有空腔，传动丝杆60置于所述空腔，且传动丝杆60远离固定连接件37的一端贯穿所述固定座59的侧壁并与所述万向软轴61相连。通过设置有固定座59来安装固定连接件37并容置传动丝杆60，可以大幅缩小基座1的横向长度，减少了生产成本。
另外，为了使得搁脚板4的整体长度足够长，能够让人体将脚全部搁上去从而感到更舒适。如图10所示，本方案中的搁脚板4包括第一搁脚板54与第二搁脚板64。其中搁脚蜗杆25设置于第二搁脚板64上使得第二搁脚板64与基座1可转动连接。而第一搁脚板54则可滑动设置于第二搁脚板64上。当第二搁脚板64相对于基座1转动展开时，第一搁脚板54可相对于第二搁脚板64滑动延展。当第二搁脚板64相对于基座1转动收拢时，第一搁脚板54可相对于第二搁脚板64滑动收缩。
作为一种具体的实施方式，请参阅图11，第二搁脚板64上设置有搁脚丝杆51，搁脚丝杆51上螺纹连接有传动件53，传动件53与第一搁脚板54相连，搁脚丝杆51与上述搁脚蜗杆25传动连接。具体的，本方案中搁脚丝杆51的尾端与搁脚蜗杆25通过斜齿轮52传动连接。斜齿轮52传动的传动效果相对较好，传动平稳，噪声小。且由于搁脚板4需要承受用户腿部重量，斜齿轮52传动机构的承载能力又相对较好。
当搁脚蜗杆25转动使得第二搁脚板64相对于所述基座1展开时，搁脚蜗杆25通过斜齿轮52带动搁脚丝杆51同步转动。搁脚丝杆51转动时就会带动所连传动件53沿搁脚丝杆51的长度方向移动。传动件53就会带动第二搁脚板64相对于第二搁脚板64滑动展开。
当搁脚蜗杆25转动使得第二搁脚板64相对于所述基座1收拢时，搁脚蜗杆25带动搁脚丝杆51同步转动，使得传动件53沿搁脚丝杆51的长度方向反向移动，迫使第一搁脚板54相对于第二搁脚板64滑动收缩。
且在本方案中，搁脚丝杆51与第一搁脚板54分别位于第二搁脚板64相对立的两端面，第二搁脚板64上设置有贯穿自身两端面的滑动通槽55，所述滑动通槽55沿搁脚丝杆51的长度方向延伸，传动件53上设置有导向块54，导向块54穿过滑动通槽55与第一搁脚板54相连。在传动件53移动的同时，导向块54带动第一搁脚板54相对于第二搁脚板64滑动延展或滑动收缩。且移动的同时，导向块54也配合滑动通槽55起到一定的导向作用。
同时，所述传动件53上设置有导向凹槽56，第一搁脚板54上设置有导向凸起57，导向凸起57沿搁脚丝杆51的长度方向延伸，导向凸起57位于所述导向凹槽56内。通过导向凹槽56及导向凸也起到一定的导向作用。
另外，第二搁脚板64的板面上还设置有多根凸条58，第一搁脚板54的板面与所述凸条58相抵。通过凸条58减少第一搁脚板54与第二搁脚板64之间的接触面积，从而减少第一搁脚板54相对于第二搁脚板64滑动时的摩擦力，便于第一搁脚板54的滑动。

Claims (15)

  1. 一种坐具单元，其特征在于：包括基座； 坐部传动机构，设置于所述基座上； 搁脚传动机构，设置于所述基座上； 承坐件，位于所述基座的上方并与所述坐部传动机构连接； 背靠件，与所述坐部传动机构连接，且所述背靠件可相对于基座于承靠位置和后仰位置之间转动； 搁脚板，与所述搁脚传动机构连接，且所述搁脚板可相对于基座于展开位置和收拢位置之间转动； 驱动组件，可移动设置于所述基座上，所述驱动组件可相对于基座于第一驱动位置和第二驱动位置之间移动；所述驱动组件移动至第一驱动位置时，所述驱动组件与所述坐部传动机构连接，所述驱动组件可通过坐部传动机构带动所述承坐件相对于基座上升或下降；所述基座上升时，所述坐部传动机构带动所述背靠件同步转动至后仰位置；所述基座下降时，所述坐部传动机构带动所述背靠件同步转动至承靠位置；所述驱动组件移动至第二驱动位置时，所述驱动组件与所述搁脚传动机构连接，所述驱动组件可通过搁脚传动机构带动搁脚板相对于基座转动。
  2. 根据权利要求1所述的坐具单元，其特征在于：所述坐部传动机构包括坐部丝杆，所述坐部丝杆上螺纹配合有第一连接件和第二连接件，所述第一连接件与所述承坐件连接；所述驱动组件位于第一驱动位置时，所述驱动组件与所述坐部丝杆相连并可驱动所述坐部丝杆绕自身轴线转动；所述驱动组件驱动所述坐部丝杆转动时，所述坐部丝杆带动第一连接件及承坐件沿坐部丝杆的长度方向移动，迫使承坐件相对于所述基座上升或下降；所述背靠件与所述第二连接件铰接，所述背靠件可相对于第二连接件转动以在承靠位置和后仰位置之间切换。
  3. 根据权利要求2所述的坐具单元，其特征在于：所述坐部丝杆包括第一坐部丝杆，所述基座与第一坐部丝杆均沿自身长度方向具有头端与尾端，所述第一坐部丝杆的头端与所述基座的头端相邻，所述第一坐部丝杆沿基座的长度方向延伸，且所述第一坐部丝杆与水平面之间呈夹角设置，所述驱动组件与所述第一坐部丝杆相连，所述驱动组件驱动第一坐部丝杆转动时，所述第一坐部丝杆带动第一连接件及承坐件沿第一坐部丝杆的长度方向移动，以使得承坐件相对于所述基座上升或下降。
  4. 根据权利要求3所述的坐具单元，其特征在于：所述坐部丝杆还包括第二坐部丝杆，所述第二坐部丝杆沿自身长度方向具有头端与尾端，所述第一坐部丝杆的尾端通过万向接头与第二坐部丝杆的头端连接，所述第二坐部丝杆沿基座的长度方向延伸，且第二坐部丝杆与水平面之间的夹角大小小于第一坐部丝杆与水平面之间的夹角大小；所述第一坐部丝杆转动时带动所述第二坐部丝杆转动，以使得第二连接件沿第二坐部丝杆长度方向移动，迫使背靠件在承靠位置和后仰位置之间切换。
  5. 根据权利要求3所述的坐具单元，其特征在于：所述搁脚传动机构包括传动丝杆，所述传动丝杆设置于所述基座上并可绕自身轴线转动，所述传动丝杆与所述搁脚板连接；所述驱动组件上连接有转动件，所述转动件可在驱动组件的作用下绕自身轴心转动；且所述驱动组件移动至第一驱动位置时，所述转动件与所述第一坐部丝杆同轴心插接配合以带动所述第一坐部丝杆同步转动；所述驱动组件移动至第二驱动位置时，所述转动件与所述传动丝杆同轴心插接配合以带动所述传动丝杆同步转动，所述传动丝杆转动时，所述传动丝杆带动所述搁脚板相对于基座于展开位置和收拢位置之间转动。
  6. 根据权利要求5所述的坐具单元，其特征在于：所述搁脚传动机构还包括搁脚蜗轮和搁脚蜗杆，所述搁脚蜗轮与所述基座保持相对固定，所述搁脚蜗杆设置于所述搁脚板上并与所述搁脚蜗轮咬合，所述搁脚蜗杆可相对于所述搁脚板绕自身轴线转动；且所述搁脚蜗杆通过万向软轴与所述传动丝杆相连；所述传动丝杆转动时，通过万向软轴带动所述搁脚蜗杆同步转动，所述搁脚蜗杆带动所述搁脚板绕所述搁脚蜗轮的圆心转动，以使得搁脚板相对于所述基座于展开位置和收拢位置之间转动。
  7. 根据权利要求6所述的坐具单元，其特征在于：所述搁脚板包括第一搁脚板与第二搁脚板，所述第二搁脚板与所述基座可转动连接，所述第二搁脚板上设置有搁脚丝杆，所述搁脚丝杆上螺纹连接有传动件，所述传动件与所述第一搁脚板相连，所述搁脚丝杆与所述搁脚蜗杆传动连接；所述第二搁脚板相对于所述基座展开时，所述搁脚蜗杆带动搁脚丝杆同步转动，使得传动件沿搁脚丝杆的长度方向移动，迫使第一搁脚板相对于第二搁脚板滑动延展；所述第二搁脚板相对于所述基座收拢时，所述搁脚蜗杆带动搁脚丝杆同步转动，使得传动件沿搁脚丝杆的长度方向反向移动，迫使第一搁脚板相对于第二搁脚板滑动收缩。
  8. 根据权利要求5所述的坐具单元，其特征在于：所述驱动组件包括驱动电机，所述驱动电机的输出轴上连接有坐部蜗杆，且所述驱动电机上设置有连接板，所述转动件为坐部蜗轮，所述坐部蜗轮可转动设置于所述连接板上，所述坐部蜗轮与坐部蜗杆相配合，使得所述驱动电机可带动所述坐部蜗轮绕自身轴心转动，且所述坐部蜗轮同轴心设有插孔，所述驱动组件移动至第一驱动位置时，所述第一坐部丝杆插于所述插孔内插接配合；所述驱动组件移动至第二驱动位置时，所述传动丝杆插于所述插孔内插接配合。
  9. 根据权利要求8所述的坐具单元，其特征在于：所述第一连接件上设置有坐部推抵件，所述坐部丝杆转动以带动所述承坐件上升至行程终点的过程中，所述坐部推抵件与所述坐部蜗轮相抵并带动坐部蜗轮移动，以使得所述坐部蜗轮及驱动组件由第一驱动位置移动至第二驱动位置。
  10. 根据权利要求8所述的坐具单元，其特征在于：所述传动丝杆上连接有传动推抵件，所述传动丝杆转动以驱动搁脚板相对于基座于展开位置转动至收拢位置时，所述传动推抵件与所述坐部蜗轮相抵并带动坐部蜗轮移动，以使得所述坐部蜗轮及驱动组件由第二驱动位置移动至第一驱动位置。
  11. 根据权利要求8所述的坐具单元，其特征在于：所述第一坐部丝杆的头端设置有坐部固定件，所述传动丝杆的尾端设置有固定连接件，所述坐部蜗轮上设置有插孔；所述驱动组件位于第一驱动位置时，所述坐部固定件插于所述插孔内插接配合；所述驱动组件位于第二驱动位置时，所述固定连接件插于所述插孔内插接配合。
  12. 根据权利要求11所述的坐具单元，其特征在于：所述坐部固定件的外环壁上于远离坐部丝杆的一端绕自身周向设置有多个第一插槽，所述固定连接件的外环壁上于远离传动丝杆的一端绕自身周向设置有多个第二插槽，所述插孔内设置有第一插接件和第二插接件，驱动组件位于第一驱动位置时，所述坐部固定件插于所述插孔内，所述第一插接件与第一插槽插接配合；所述驱动组件位于第二驱动位置时，所述固定连接件插于所述插孔内，所述第二插接件与第二插槽插接配合。
  13. 根据权利要求12所述的坐具单元，其特征在于：所述第一插槽与第二插槽均沿自身槽口至槽底方向依次分为第一径缩部、等径部和第二径缩部，所述第一插槽与第二插槽的槽宽沿槽口至槽底方向于第一径缩部逐渐缩小，所述第一插槽与第二插槽的槽宽于等径部保持一致，所述第一插槽与第二插槽的槽宽沿槽口至槽底方向于第二径缩部逐渐缩小；所述第一插接件与第二插接件的外形与所述第一插槽和第二插槽的形状相匹配。
  14. 根据权利要求2所述的坐具单元，其特征在于：所述基座的数量为两个，两个基座镜像设置并朝同一方向延伸，且其中一个基座上未设有所述驱动组件、搁脚驱动机构和搁脚板，两个基座上的坐部丝杆通过传动连接件传动连接。
  15. 一种坐具，其特征是包括权利要求1-14任一项所述的坐具单元。
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