WO2024016418A1 - 用于可活动的座椅单元的机械伸展装置及座椅单元 - Google Patents

用于可活动的座椅单元的机械伸展装置及座椅单元 Download PDF

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Publication number
WO2024016418A1
WO2024016418A1 PCT/CN2022/114258 CN2022114258W WO2024016418A1 WO 2024016418 A1 WO2024016418 A1 WO 2024016418A1 CN 2022114258 W CN2022114258 W CN 2022114258W WO 2024016418 A1 WO2024016418 A1 WO 2024016418A1
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WIPO (PCT)
Prior art keywords
seat frame
linkage
mounting plate
seat
frame mounting
Prior art date
Application number
PCT/CN2022/114258
Other languages
English (en)
French (fr)
Inventor
蔡赛军
李晓鸿
李元坤
吕战征
Original Assignee
锐迈科技股份有限公司
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 CN202210868466.8A external-priority patent/CN117461955A/zh
Priority claimed from CN202221916203.1U external-priority patent/CN219289059U/zh
Application filed by 锐迈科技股份有限公司 filed Critical 锐迈科技股份有限公司
Publication of WO2024016418A1 publication Critical patent/WO2024016418A1/zh

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/50—Supports for the feet or the legs coupled to fixed parts of the chair

Definitions

  • the invention relates to a mechanical extension device for a movable seat unit and to a seat unit comprising said mechanical extension device.
  • movable seating units are known in the prior art, such as sofas or seats with multi-position changing functions. As people's living standards improve, the comfort requirements for sofas and seats are also increasing.
  • movable seating units are usually equipped with mechanical extension means, whereby they can be changed between a sitting position, a lounging position (or TV position) and a lying position.
  • the footrest of the seat unit When changing to the leisure posture state, the footrest of the seat unit extends forward, and the angle between the backrest and the seat part remains basically unchanged.
  • the seat unit changes from the leisure posture state to the lying posture state the footrest is relatively small. The leisure posture state is further raised forward and upward, and the backrest is significantly tilted back. As a result, the user of the seat unit has a so-called "zero gravity" feeling with his legs higher than his head when lying down.
  • the disadvantage of the known design is that as the seat unit changes to the lying position, the seat portion is tilted up too sharply, causing the seat portion to form an excessively large angle with the horizontal plane, thus affecting the user's comfort.
  • the sharp upturn of the seat also causes a large gap to form between the seat and the backrest, which not only brings the risk of items falling, but also creates safety hazards that can easily pinch the user.
  • the technical problem to be solved by the present invention is to provide a seat unit with a simple structure, more in line with ergonomic mechanics and higher safety.
  • the present invention provides a mechanical extension device for a movable seat unit.
  • the mechanical extension device includes two mirror-symmetrical left and right halves, of which only one half will be described below.
  • the mechanical extension device according to the invention for a movable seating unit consists of:
  • the linkage bracket includes a support structure for movably supporting the mechanical extension device, a linkage structure movably connected with the seat part of the seat unit and a seat frame mounting plate for attaching the seat part, so
  • the above-mentioned linkage structure includes side plates;
  • a leg extension with a footrest pivotably connected to the linkage bracket and attached to the footrest of the seating unit.
  • the mechanical stretching device is configured to realize the transformation of the seat unit between two or three states among the sitting state, the leisure state and the lying state.
  • the seat unit can sequentially change between the sitting position, the leisure position and the lying position, or vice versa; the seat unit can also directly change from the sitting position to the lying position or vice versa.
  • the footrest In the sitting position, the footrest is folded under the seat; in the leisure position, the footrest is extended to the front of the seat; in the lying position, the backrest is tilted back so that the backrest and the seat are
  • the angle between the position and the rest position increases relative to the sitting position and the leisure position, the footrest extends to the front of the seat, and the footrest preferably extends further forward and upward than in the leisure position, More preferably, the height of the highest point of the leg extension structure relative to the horizontal plane is greater than the height of the highest point of the back mechanism relative to the horizontal plane, thereby forming a so-called "zero gravity" position in which the seat unit uses
  • the patient's legs are significantly higher than the head, at least higher than the chest.
  • the seat frame mounting plate and the linkage structure are relatively pivotably hinged at a first hinge point, thereby forming a first included angle with the extension direction of the side plate and the seat frame mounting plate as the side.
  • the seat frame mounting plate and the linkage structure are relatively pivoted through the pivot mechanism and cause the first included angle to change.
  • the seat frame mounting plate and the side plate of the linkage structure are relatively pivotably hinged at a first hinge point, thereby forming a structure with the first hinge point as the vertex, the side plate and the linkage structure.
  • the extension direction of the seat frame mounting plate is the first included angle of the side.
  • the seat frame mounting plate and the side plate relatively pivot around the first hinge point through the pivot mechanism, causing the first included angle to change.
  • the seat frame mounting plate may also be hinged to the side panel indirectly, for example by means of other connecting members, such as one or more pivoting members.
  • the first included angle changes from 0° to 15°, preferably from 2° to 8°, and most preferably from 4° to 6°.
  • the first hinge point when the first hinge point is provided at the front end of the seat frame mounting plate, the first included angle becomes larger during the reclining process of the backrest; and when the first hinge point When arranged at the rear end of the seat frame mounting plate, the first included angle becomes smaller during the reclining process of the backrest.
  • the front end of the side plate of the linkage structure moves upward and forward, so that the first hinge point between the seat frame mounting plate and the side plate also moves upward and forward. move.
  • the rear end of the seat frame mounting plate is raised as the free end, which makes the first included angle become larger; and when the first hinge point is set at the rear end, The front end of the seat frame mounting plate descends as the free end, which makes the first included angle smaller.
  • the degree of upward inclination of the seat frame mounting plate of the present invention is significantly reduced during the backrest reclining process.
  • this allows the user to adopt a more stretched posture when lying down, thereby improving comfort.
  • it eliminates the gap between the seat and the backrest caused by the sharp upturn of the seat, improving user comfort. Convenience and improved safety of use.
  • a support flange is formed on the seat frame mounting plate, and the seat portion can be mounted on the support flange.
  • the seat frame mounting plate remains stationary relative to the backrest.
  • the support flange can be supported with its underside on the side plate.
  • the support flange can be supported with its bottom side on the side plate at the rear of the seat frame mounting plate, more preferably on the side plate. on the corresponding convex portion, so that the seat frame mounting portion is always supported on the side panel when the seat unit transitions from a sitting position to a leisure position. The user can always maintain a more relaxed posture and obtain better results. comfort level.
  • the linkage structure includes a lifting assembly.
  • the lifting assembly urges the rear end of the seat portion upward during the backrest reclining process.
  • Lift is provided at the front end of the seat frame mounting plate
  • the lifting assembly urges the front end of the seat portion to lower downwards.
  • the pivot mechanism is designed as a seat frame pivot rod, wherein when the first hinge point is provided at the front end of the seat frame mounting plate, the seat frame mounting plate is connected to the seat frame pivot rod at its rear end.
  • One end of the seat frame pivot rod is hinged at the second hinge point, and the other end of the seat frame pivot rod is hinged with the linkage structure, preferably with the lifting assembly.
  • the support structure includes a base, a first support member and a second support member that are pivotably connected to the base, respectively, and the lifting assembly is provided on the first support member. and between the second support member.
  • the lifting assembly includes a lifting linkage, and the lifting linkage is pivotably connected to the seat frame pivot rod.
  • the lifting linkage pivots, so that there is a gap between the seat frame pivot rod and the seat frame mounting plate.
  • the second hinge point rises, thereby lifting the rear end of the seat frame mounting plate upward.
  • the other end of the seat frame pivot rod is pivotally connected to the lifting linkage.
  • a four-bar linkage mechanism is formed by the seat frame mounting plate, the seat frame pivot rod, the lifting linkage and the side plate.
  • the position of the hinge point on the lifting linkage is adjusted so that the seat unit is During the process of reclining the backrest, the second hinge point between the seat frame pivot rod and the lifting linkage moves forward and downward, thereby forcing the front end of the seat frame mounting plate to lower downward through the seat frame pivot rod.
  • the lifting assembly further includes a first lifting link and a second lifting link.
  • the lifting linkage is pivotably coupled to the support structure, the first lifting link, the back mechanism, and the linkage structure respectively.
  • the lifting linkage is provided with a support connection point, a transmission connection point, a back connection point, and preferably also a linkage connection point.
  • the support connection point is pivotably coupled to the support structure, preferably the second support member of the support structure; the transmission connection point is pivotably coupled to the first lifting link; the back connection point is to the back mechanism Pivotably coupled.
  • the linkage connection point is pivotably coupled to the linkage structure, preferably the side plate of the linkage structure.
  • first distance L1 between the transmission connection point and the support connection point
  • second distance L2 between the transmission connection point and the back connection point
  • first distance L1 The ratio to the second L2 ranges from 0.95 to 0.75.
  • the support flange of the seat part forms a second included angle with the horizontal direction.
  • the second included angle becomes larger.
  • the second included angle is between 10° and 18°, preferably between 14° and 16°.
  • the height of the highest point of the leg extension structure relative to the ground is 400mm to 600mm, preferably 554mm.
  • the seat unit according to the present invention achieves a smaller inclination of the seat portion when the leg height is the same in the lying position, thereby improving the Comfort of use.
  • the linkage structure further includes a first linkage piece, a second linkage piece and a third linkage piece.
  • the middle part of the second linkage piece is rotationally connected to the side plate.
  • One end of the second linkage piece is connected to one end of the first linkage piece.
  • the other end of a linkage member is connected to the first support member, the other end of the second linkage member is connected to one end of the third linkage member, and the other end of the third linkage member is connected to the foot rest extension mechanism.
  • the mechanical stretching device also includes a leg stretching structure, which includes a first leg link, a second leg link, a third leg link, a fourth leg link, a rest Foot piece, wherein the rear end of the first leg link is hinged to the linkage structure, the front end of the first leg link is hinged to the rear end of the second leg link, and the rear end of the third leg link is hinged. It is hinged with the linkage mechanism, the front end of the third leg link is hinged with the rear end of the fourth leg link, the second leg link and the fourth leg link are respectively hinged with the footrest at their front ends, wherein, The middle part of the second leg link is also hinged with the middle part of the third leg link.
  • the second leg link is provided with a first connection point at one end close to the first leg link.
  • the second leg link is hingedly connected to the middle part of the third leg link at the first connection point.
  • the invention also relates to a seating unit comprising a mechanical extension device as described above, an armrest attached to said mechanical extension device, a seat part, a backrest, a footrest, preferably including an electric drive.
  • the seat unit can be designed as an iron frame floor-standing seat unit.
  • the support structure of the mechanical extension device is movably supported on the ground.
  • the seat unit can also be designed as an armrest floor-standing seat unit.
  • the support structure of the mechanical extension device is movably attached to the armrest, and the bottom surface of the armrest is supported on the ground. .
  • Figure 1 is a perspective view of a mechanical stretching device in a lying position according to an embodiment of the present invention
  • Figure 2 is a side view of the mechanical stretching device shown in Figure 1 in a seated position
  • Figure 3 is a side view of the mechanical stretching device shown in Figure 1 in a relaxed position
  • Figure 4 is a side view of the mechanical stretching device shown in Figure 1 in a lying position
  • Figure 5 is a side view of the mechanical stretching device shown in Figure 2 from another angle;
  • Figure 6 is a side view of the mechanical stretching device shown in Figure 3 from another angle;
  • Figure 7 is a side view of the mechanical stretching device shown in Figure 4 from another angle;
  • Figure 8 is a side view of a mechanical stretching device in a relaxed position according to another embodiment of the present invention.
  • Figure 9 is a side view of the mechanical stretching device shown in Figure 8 in a lying position
  • Figure 10 is a perspective view of a seat unit according to an embodiment of the present invention.
  • Figures 11a and 11b are side views of the seat unit shown in Figure 10, which is in a sitting position;
  • Figures 12a and 12b are side views of the seat unit shown in Figure 10, which is in a leisure position;
  • Figures 13a and 13b are side views of the seat unit shown in Figure 10, which is in a lying position;
  • Figure 14 is a perspective view of a seat unit according to another embodiment of the present invention.
  • Figure 15 is a side view of the seat unit shown in Figure 14 in a seated position.
  • references herein to "one embodiment” or “an embodiment” refers to a particular feature, structure, or characteristic that may be included in at least one implementation of the invention.
  • the orientation or positional relationship indicated by the terms “upper”, “lower”, “left”, “right”, “top”, “bottom”, etc. are based on those shown in the accompanying drawings.
  • the orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as “first” and “second” may explicitly or implicitly include one or more of these features.
  • first, second, etc. are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It is to be understood that the figures so used are interchangeable under appropriate circumstances so that the embodiments of the invention described herein are capable of being practiced in sequences other than those illustrated or described herein.
  • the present invention is first explained by taking the iron frame floor-standing mechanical extension device shown in Figures 1 to 7 as an example, in which the front end of the seat mounting plate 135 is hinged with the front end of the side plate 131.
  • FIG. 1 schematically illustrates an embodiment of a mechanical extension device for a movable seat unit.
  • the mechanical stretching device includes: a linkage bracket 1, a back mechanism 2 and a leg stretching structure 3.
  • the linkage bracket 1 includes a support structure 12 , a linkage structure 13 , and a seat frame mounting plate 135 .
  • the mechanical stretching device shown in FIGS. 1 to 7 is implemented as an iron frame floor-standing mechanical stretching device.
  • the support structure 12 includes a base 121 , a first support member 122 and a second support member 123 .
  • the base 121 includes two mirror-symmetrical side rails 1211 disposed on the left and right sides, and preferably also includes a front cross rail 1212 and a rear cross rail 1213 that connect the two side rails 1211 .
  • the first support member 122 is hinged with its lower end and the front end of the side rail 1211
  • the second support member 123 is hinged with its lower end and the rear end of the side rail 1211 .
  • the linkage structure 13 includes a side plate 131, a first linkage part 132, a second linkage part 133, a third linkage part 134, a seat frame pivot rod 136 and a lifting assembly 124.
  • the middle part of the second linkage member 133 is rotationally connected to the side plate 131, one end of the second linkage member 133 is connected to one end of the first linkage member 132, the other end of the first linkage member 132 is connected to the first support member 122, and the second linkage member 133 is connected to the first support member 122.
  • the other end of the linkage member 133 is connected to one end of the third linkage member 134 , and the other end of the third linkage member 134 is pivotably connected to the leg extension structure 3 .
  • the front end of the seat frame mounting plate 135 is hinged with the front end of the side plate 131 at the first hinge point 137
  • the opposite free end of the seat mounting plate 135 is
  • One end of the seat frame pivot rod 136 is hinged at the second hinge point 138 , wherein the other end of the seat frame pivot rod 136 is linked with the lifting and lowering of the linkage structure 13 , specifically with the lifting assembly 124 of the linkage structure 13 Piece 1241 is hinged.
  • the lifting assembly 124 includes: a lifting linkage 1241 , a first lifting link 1242 and a second lifting link 1243 .
  • the lifting assembly 124 is provided between the first support member 122 and the second support member 123 .
  • the lifting linkage 1241 is provided with a support connection point 1241a, a transmission connection point 1241b, a back connection point 1241c and a linkage connection point 1241d, wherein the support connection point 1241a is connected to the second support member of the support structure 12 123 is pivotably coupled, the transmission connection point 1241b is pivotably coupled to one end of the first lifting link 1242, and the other end of the first lifting link 1242 is connected to the first support through the second lifting link 1243.
  • the member 122 is pivotably connected; the back connection point 1241c is pivotably coupled with the back link 22 of the back mechanism 2, and the linkage connection point 1241d is pivotably coupled with the side plate 131 of the linkage structure 13 .
  • first distance L1 between the transmission connection point 1241b and the support connection point 1241a
  • third distance L1 between the transmission connection point 1241b and the back connection point 1241c.
  • Second distance L2 the ratio range of the first distance L1 and the second distance L2 is 0.95 to 0.75.
  • a support flange 1351 is formed on the seat frame mounting plate 135 , which is preferably constructed in one piece with the seat frame mounting plate 135 .
  • the back mechanism 2 includes a back link 21 attached to the backrest and a back link 22 pivotally connected thereto.
  • the backrest connector 21 is hingedly connected to the rear end of the side plate 131 of the linkage structure 13 .
  • the leg extension structure 3 is composed of a plurality of links that are pivotally connected to each other, wherein the rear end of the first leg link 31 is hinged with the side plate 131 of the linkage structure 13, and the first leg link
  • the front end of 31 is hinged with the rear end of the second leg link 32
  • the rear end of the third leg link 33 is hinged with the front end of the side plate 131
  • the front end of the third leg link 33 is hinged with the fourth leg link
  • the rear end of 34 is hinged
  • the second leg link 32 and the fourth leg link 34 are respectively hinged with the footrest 35 at their front ends, wherein the second leg link 32 is close to the first leg
  • One end of the connecting rod 31 is provided with a first connection point 321
  • the second leg link 32 is hingedly connected to the middle part of the third leg link 33 at the first connection point 321 .
  • the linkage bracket 1 also includes a transmission structure 14, and the transmission structure 14 includes a first transmission member 141 and a second transmission member 142 that are connected.
  • One end of the first transmission member 141 is hinged to the second transmission member 142, and the other end is directly or indirectly connected to a driving device, preferably an electric driving device.
  • a driving device preferably an electric driving device.
  • one end of the first transmission member 141 is hinged to one end of the second transmission member 141
  • the other end of the first transmission member 141 is attached to the side plate 131 and connected to the electric driving device 8 via a pivoting link.
  • the other end of the second transmission member 142 is connected to the first leg link 31 of the leg extension structure 3 .
  • the driving device is used to drive the linkage bracket to move through the transmission structure.
  • the electric driving device can be a push rod motor or a slide motor driving device, preferably a linear motor; in other embodiments, the driving device can be a manual driving device.
  • the movement of the linkage bracket 1 drives the back mechanism 2 and the leg extension device 3 to expand or contract, so that the mechanical extension device can realize the sitting state of the seat unit as shown in Figures 2 and 5, Figure 3,
  • a mechanical stretching device capable of changing between sitting, leisure and lying postures is taken as an example.
  • the footrest 35 In the sitting position, the footrest 35 is folded under the seat; in the leisure position, the footrest 35 is extended to the front of the seat; in the lying position, the backrest is tilted back so that the angle between the backrest and the seat is The footrest 35 extends further forward and upward than in the seated position and in the relaxed position.
  • the linkage structure 13 drives the first support member 122 to tilt forward, thereby driving the lifting assembly 124 Move forward.
  • the seat frame mounting plate 135 is supported on the side plate 131 with the bottom side of its supporting flange 1351, so that the seat portion always remains stationary relative to the side plate 131 during this process.
  • the lifting linkage The moving member 1241 pivots in the counterclockwise direction around the hinge point with the second support member 123, causing the second hinge point 138 between the seat frame pivot rod 136 and the lifting linkage 1241 to move upward, thereby pivoting the seat frame.
  • the rod 136 pushes the rear end of the seat frame mounting plate 135 to rise.
  • the inclination amplitude of the seat frame mounting plate 135 is not so large.
  • the front end of the seat frame mounting plate 135 and the front end of the side plate 131 are relatively pivotably hinged at the first hinge point 137, thereby forming a side view of the mechanical extension device.
  • the first included angle ⁇ takes the first hinge point 137 as the vertex and the extension direction of the side plate 131 and the seat frame mounting plate 135 as the side.
  • the first included angle ⁇ becomes larger.
  • the first included angle ⁇ increases. 0° to 15°, preferably 2° to 8°, most preferably 4° to 6°.
  • Figures 8 and 9 show another iron frame floor-standing mechanical stretching device.
  • the embodiment shown in Figs. 8 and 9 is basically the same as the embodiment shown in Figs. 1 to 7. The only difference is that in the embodiment shown in Figs. 8 and 9, the seat mounting plate 135 has its rear end and side The rear end of plate 131 is hinged.
  • the rear end of the seat mounting plate 135 is hinged with the rear end of the side plate 131 at the first hinge point 137 , and the opposite free end of the seat mounting plate 135 is hinged with the seat frame pivot rod 136 One end is hinged at the second hinge point 138 , wherein the other end of the seat frame pivot rod 136 is hinged with the linkage structure 13 , specifically with the lifting linkage 1241 in the lifting assembly 124 of the linkage structure 13 .
  • the seat frame pivot rod 136 By adjusting the position of the hinge point between the seat frame pivot rod 136 and the lift linkage 1241 on the lift link 1241, when the backrest of the seat unit is tilted back, the seat frame pivot rod 136 is connected to the lift linkage 1241.
  • the second hinge point 138 between the moving parts 1241 moves forward and downward, thereby forcing the front end of the seat frame mounting plate 135 to drop through the seat frame pivot rod 136 .
  • the inclination amplitude of the seat frame mounting plate 135 is not so large.
  • the rear end of the seat frame mounting plate 135 and the rear end of the side plate 131 are relatively pivotably hinged at a first hinge point 137 , thereby forming a first hinge point.
  • 137 is the vertex and the first included angle ⁇ with the extension direction of the side plate 131 and the seat frame mounting plate 135 as the side.
  • the first included angle ⁇ becomes smaller.
  • the first included angle ⁇ decreases 0° to 15°, preferably 2° to 8°, most preferably 4° to 6°.
  • Figures 10 to 13b exemplarily illustrate an iron frame floor-standing seating unit according to the present invention.
  • the seat unit shown includes a mechanical extension device according to the invention, an armrest 4 attached to said mechanical extension device, a seat frame 5 for attaching a seat portion, a backrest 6, a footrest 7, Electric drive unit.
  • the mechanical extension device is movably supported on the ground by the base 121 of the support structure 12 .
  • Figures 11a and 11b show the seat unit in a sitting position, in which the backrest 6 remains substantially vertical and the footrest 7 attached to the footrest is folded under the seat.
  • Figures 12a and 12b show the seat unit in a leisure position, in which the leg extension device drives the footrest 7 to extend forward and upward, and the seat frame 5 remains substantially stationary relative to the backrest 6.
  • Figures 13a and 13b show the seat unit in a lying position, in which the backrest 6 is tilted back and the front end of the seat frame 5 is tilted upward.
  • the tilt angle is significantly reduced.
  • the seat unit according to the present invention can be converted between the sitting posture, the leisure posture and the lying posture shown in Figures 11a to 13b, and can also be directly converted from the sitting posture shown in Figures 11a and 11b to Figures 13a and 13b The lying position shown or the reverse transformation.
  • the seat unit shown includes a mechanical extension device according to the invention, an armrest 4 attached to said mechanical extension device, a seat frame 5 for attaching a seat part, a backrest 6, an electric drive and Footrest not shown.
  • the handrails 4 are respectively fixedly connected to the base of the support structure 12, and the bottom surface of the handrails 4 is also supported on the ground.
  • Figure 15 shows a side view of the seating unit in a seated position, with one armrest removed for clarity.
  • the support flange 1351 for supporting the seat portion 5 forms a second included angle ⁇ with the horizontal direction.
  • the second included angle ⁇ becomes larger, wherein preferably, in the lying posture state, the second included angle ⁇ is 10° and 18°. between, preferably between 14° and 16°.
  • the height of the highest point of the leg extension structure 3 relative to the ground is 400mm to 600mm, preferably 554mm.

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Abstract

一种用于可活动的座椅单元的机械伸展装置，包括: 联动支架(1)，联动支架(1)包括支撑结构(12)、联动结构(13)和座框安装板(135)，联动结构(13)具有侧板(131); 背部机构(2)，背部机构(2)与联动支架(1)可枢转连接并且用于与座椅单元的靠背附接; 带有搁脚件的腿部伸展结构(3)，腿部伸展结构(3)与联动支架(1)可枢转地连接并且搁脚件与座椅单元的脚凳附接。座框安装板(135)与联动结构(13)在第一较接点(137)处可相对枢转地铰接，由此形成以侧板(131)和座框安装板(135)的延伸方向为边的第一夹角(α)，在靠背为实现座椅单元向躺姿状态变换的后仰过程中，座框安装板(135)与联动结构(13)通过枢转机构相对枢转并导致第一夹角(α)的变化。

Description

用于可活动的座椅单元的机械伸展装置及座椅单元
本申请要求于2022年7月22日递交的中国专利申请第202210868466.8号以及于2022年7月22日递交的中国专利申请第202221916203.1号的优先权，在此全文引用上述中国专利申请公开的内容作为本申请的一部分。
技术领域
本发明涉及一种用于可活动的座椅单元的机械伸展装置以及一种包括所述机械伸展装置的座椅单元。
背景技术
在现有技术中已知多种用于可活动的座椅单元，例如具备多位置变换功能的沙发或座椅等。随着人们生活水平的提高，对于沙发、座椅的舒适性要求也日益提高。在已知的设计中，可活动的座椅单元通常具备机械伸展装置，借此能够在坐姿、休闲姿(或者说TV位置)和躺姿状态之间变换，在所述座椅单元从坐姿状态变换至休闲姿状态时，座椅单元的脚凳向前伸出，靠背与坐席部之间的角度基本不变，在所述座椅单元从休闲姿状态向躺姿状态变换时，脚凳较之休闲姿状态进一步向前且向上抬升，靠背显著后仰，从而座椅单元的使用者处于躺姿状态时腿部高于头部，体验到所谓的“零重力”感受。
然而在已知设计中的弊端在于，随着座椅单元向躺姿状态的变换，坐席部过于剧烈地上翘，从而使坐席部与水平面形成过大角度，以至于影响使用者的舒适度。此外，坐席部的剧烈上翘还导致坐席部与靠背之间形成较大缝隙，不仅带来物品掉落的风险，还造成容易夹伤使用者的安全隐患。
发明内容
本发明所要解决的技术问题在于，提供一种结构简单、更符合人体工程力学且安全性更高的座椅单元。
为解决上述技术问题，本发明提供一种用于可活动的座椅单元的机械伸展装置，该机械伸展装置包括镜像对称的左右两个半部，以下仅就其中一个半部进行描述。
根据本发明的用于可活动的座椅单元的机械伸展装置包括：
-联动支架，所述联动支架包括用于可活动地支撑机械伸展装置的支撑结构、与座椅单元的坐席部可活动地连接的联动结构和用于附接坐席部的座框安装板，所述联动结构包括侧板；
-背部机构，所述背部机构与联动支架可枢转连接并且用于与座椅单元的靠背附接；
-带有搁脚件的腿部伸展结构，所述腿部伸展结构与联动支架可枢转地连接并且所述搁脚件与座椅单元的脚凳附接。
根据本发明的机械伸展装置被构造为，能够实现座椅单元在坐姿状态、休闲姿状态与躺姿状态中两个或三个状态之间的变换。换言之，所述座椅单元能够在坐姿状态、休闲姿状态与躺姿状态之间依次变换或反向的依次变换；所述座椅单元也能够直接从坐姿状态变换为躺姿状态或反向变换。在所述坐姿状态中，搁脚件收拢在坐席部下方；在所述休闲姿状态中，搁脚件伸展至坐席部前方；在所述躺姿状态中，靠背后仰，使得靠背与坐席部之间的角度相对于坐姿状态和所述休闲姿状态中增大，搁脚件伸展至坐席部前方，且搁脚件优选地与在所述休闲姿状态中相比进一步向前且向上延伸，更优选地使得腿部伸展结构的最高点相对于水平面的高度大于背部机构的最高点相对于水平面的高度，从而形成所谓的“零重力”位置，在所述零重力位置中，座椅单元使用者的腿部明显高于头部、至少高于胸部。
根据本发明，所述座框安装板与联动结构在第一铰接点处可相对枢转地铰接，由此形成以侧板和座框安装板的延伸方向为边的第一夹角。在座椅单元的靠背为实现座椅单元向躺姿状态变换的后仰的过程中，所述座框安装板与联动结构通过枢转机构相对枢转并导致所述第一夹角的变化。
在一种优选的实施方式中，所述座框安装板与联动结构的侧板在第一铰接点处可相对枢转地铰接，由此形成以该第一铰接点为顶点、以侧板和座框安装板的延伸方向为边的第一夹角。在靠背后仰的过程中，所述座框安装板与侧板通过枢转机构绕第一铰接点相对枢转并导致所述第一夹角的变化。
可选地，座框安装板也可以间接地、例如借助其他连接件、例如一个或多个枢转件与侧板铰接。
根据本发明，在靠背的后仰过程中，所述第一夹角变化0°至15°、优选变化2°至8°、最优选变化4°至6°。
根据本发明优选地，当所述第一铰接点设置在所述座框安装板的前端时，在靠背的后仰过程中，所述第一夹角变大；而当所述第一铰接点设置在所述座框安装板的后端时，在靠背的后仰过程中，所述第一夹角变小。
在该实施方式中，在靠背后仰的过程中，联动结构的侧板的前端向上且向前移动，从而使得座框安装板与侧板之间的第一铰接点也随之向上且向前移动。与此同时，当第一铰接点设置在前端时，座框安装板的后端作为自由端升高，这使得所述第一夹角变大；而当第一铰接点设置在后端时，座框安装板的前端作为自由端下降，这使得所述第一夹角变小。
与坐席部与侧板固定装配的设计相比，本发明的座框安装板在靠背后仰过程中的向上倾斜程度明显减小。这一方面令使用者能够在躺姿状态下采取更舒展的姿态，从而提高使用舒适度，另一方面消除了因坐席部剧烈上翘所导致的坐席部与靠背之间的间隙，改进了使用便利性并提高了使用安全性。
根据本发明，在所述座框安装板上构造有支承凸缘，坐席部能够安装在所述支承凸缘上。
根据本发明一种可选的实施方式，在座椅单元从坐姿状态变换至休闲姿状态的过程中，座框安装板相对于靠背保持不动。在这种设计方案中，所述支承凸缘能够以其底侧支承在侧板上。优选地在第一铰接点设置在所述座框安装板的前端的设计方式中，支承凸缘能够以其底侧在座框安装板的后部支承在侧板上，更优选地支承在侧板的相对应的凸起部上，从而使座框安装部在座椅单元从坐姿状态转变至休闲姿状态的过程中始终支承在侧板上，使用者可始终保持较为舒展的姿态，获得更好的舒适度。
根据本发明，所述联动结构包括升降组件，当所述第一铰接点设置在所述座框安装板的前端时，在靠背后仰的过程中，所述升降组件促使坐席部的后端向上抬升。可选地，当所述第一铰接点设置在所述座框安装板的后端时，升降组件促使坐席部的前端向下降低。
根据本发明，所述枢转机构设计为座框枢转杆，其中，当第一铰接点设置在所述座框安装板的前端时，座框安装板在其后端与座框枢转杆的一端在第二铰接点处铰接，其中，座框枢转杆的另一端与联动结构、优选与升降组件铰接。
根据本发明优选地，所述支撑结构包括底座和与所述底座可枢转连接的第一支撑件和第二支撑件分别与底座可枢转地连接，所述升降组件设置在第 一支撑件和第二支撑件之间。
根据本发明优选地，所述升降组件包括升降连动件，所述升降连动件与所述座框枢转杆可枢转地连接。当所述第一铰接点设置在所述座框安装板的前端时，在靠背的后仰过程中，所述升降连动件发生枢转，使得座框枢转杆与座框安装板之间的第二铰接点上升，从而将座框安装板的后端向上抬升。在这种设计方式中，座框枢转杆的所述另一端与升降连动件枢转连接。由此，由座框安装板、座框枢转杆、升降连动件和侧板构成四连杆机构。从而在靠背后仰的过程中，当联动结构的升降组件、优选升降连动件在侧板的带动下枢转运动时，推动座框枢转杆与座框安装板之间的第二铰接点向上移动，进而使与座框枢转杆枢转连接的座框安装板的后端上升。当所述第一铰接点设置在所述座框安装板的后端时，通过调整座框枢转杆与升降连动件之间的铰接点在升降连接件上的位置，使得在座椅单元的靠背后仰的过程中，座框枢转杆与升降连动件之间的第二铰接点向前且向下移动，从而通过座框枢转杆迫使座框安装板的前端向下降低。
根据本发明，所述升降组件还包括第一升降连杆和第二升降连杆。在该设计方式中优选地，升降连动件分别与支撑结构、第一升降连杆、背部机构、联动结构可枢转地耦连。
根据本发明，升降连动件设有支撑连接点、传动连接点、背部连接点，优选地还设有联动连接点。所述支撑连接点与支撑结构、优选支撑结构的第二支撑件可枢转地耦连；所述传动连接点与第一升降连杆可枢转地耦连；所述背部连接点与背部机构可枢转地耦连。优选地，所述联动连接点与联动结构、优选所述联动结构的侧板可枢转地耦连。
在该实施方式中优选地，所述传动连接点与所述支撑连接点之间具有第一距离L1，所述传动连接点与所述背部连接点之间具有第二距离L2，第一距离L1与第二L2的比值范围为0.95至0.75。
坐席部、优选座框安装板的支承凸缘与水平方向成第二夹角。在座椅单元的靠背后仰的过程中，所述第二夹角变大。其中优选地，在靠背完全后仰的状态下，也即在躺姿状态中，所述第二夹角为10°与18°之间、最好为14°与16°之间的角度，此时腿部伸展结构的最高点相对于地面的高度为400mm至600mm、优选为554mm。
由此，与坐席部和侧板固定装配的设计方式相比，根据本发明的座椅单 元在躺姿状态下在腿部高度相同的情况下实现了更小幅度的坐席部倾斜，从而提高了使用舒适度。
根据本发明，联动结构还包括第一联动件、第二联动件和第三联动件，第二联动件的中部与侧板转动连接，第二联动件一端与第一联动件的一端连接，第一联动件的另一端与第一支撑件连接，第二联动件的另一端与第三联动件的一端连接，第三联动件另一端与搁脚延伸机构连接。
根据本发明的机械伸展装置还包括腿部伸展结构，所述腿部伸展结构包括第一腿部连杆、第二腿部连杆、第三腿部连杆、第四腿部连杆、搁脚件，其中，所述第一腿部连杆的后端与联动结构铰接，第一腿部连杆的前端与第二腿部连杆的后端铰接，第三腿部连杆的后端与联动机构铰接，第三腿部连杆的前端与第四腿部连杆的后端铰接，第二腿部连杆和第四腿部连杆分别在其前端与搁脚件铰接，其中，所述第二腿部连杆的中部还与第三腿部连杆的中部铰接，优选地，所述第二腿部连杆靠近所述第一腿部连杆的一端设置有第一连接点，所述第二腿部连杆在所述第一连接点处与所述第三腿部连杆的中部铰接。
另一方面，本发明还涉及一种座椅单元，其包括上述机械伸展装置、与所述机械伸展装置附接的扶手、坐席部、靠背、脚凳，优选地包括电动驱动装置。
优选地，所述座椅单元可以设计为铁架落地式的座椅单元，在这种设计方式中，机械伸展装置的支撑结构可活动地支撑在地面上。
优选地，所述座椅单元也可以设计为扶手落地式的座椅单元，在这种设计方式中，机械伸展装置的支撑结构可活动地附接在扶手上，扶手的底面则支撑在地面上。
附图说明
以下借助附图详细阐述本发明的实施方式。
图1是根据本发明的一种实施方式的机械伸展装置的立体图，其处于躺姿状态中；
图2是图1所示机械伸展装置的侧视图，其处于坐姿状态中；
图3是图1所示机械伸展装置的侧视图，其处于休闲姿状态中；
图4是图1所示机械伸展装置的侧视图，其处于躺姿状态中；
图5是图2所示机械伸展装置的另一角度的侧视图；
图6是图3所示机械伸展装置的另一角度的侧视图；
图7是图4所示机械伸展装置的另一角度的侧视图；
图8是根据本发明的另一种实施方式的机械伸展装置的侧视图，其处于休闲姿状态中；
图9是图8所示机械伸展装置的侧视图，其处于躺姿状态中；
图10是根据本发明的一种实施方式的座椅单元的立体图；
图11a、图11b是图10所示座椅单元的侧视图，其处于坐姿状态中；
图12a、图12b是图10所示座椅单元的侧视图，其处于休闲姿状态中；
图13a、图13b是图10所示座椅单元的侧视图，其处于躺姿状态中；
图14是根据本发明的另一种实施方式的座椅单元的立体图；
图15是图14所示座椅单元的侧视图，其处于坐姿状态。
具体实施方式
下面将结合本发明实施方式中的附图，对本发明实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式仅仅是本发明一部分实施方式，而不是全部的实施方式。基于本发明中的实施方式，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施方式，都属于本发明保护的范围。
此处所称的“一个实施方式”或“实施方式”是指可包含于本发明至少一个实现方式中的特定特征、结构或特性。在本发明的描述中，需要理解的是，术语“上”、“下”、“左”、“右”、“顶”、“底”等指示的方位或位置关系为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。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含的包括一个或者更多个该特征。而且，术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本发明的实施方式能够以除了在这里图示或描述的那些以外的顺序实施。
在此，首先以图1至图7所示的铁架落地式的机械伸展装置为例阐释本 发明，其中，座椅安装板135以其前端与侧板131的前端铰接。
根据图1示意性地示出一种用于可活动的座椅单元的机械伸展装置的一种实施方式。所述机械伸展装置包括：联动支架1、背部机构2和腿部伸展结构3。
具体地，如图3所示，联动支架1包括支撑结构12、联动结构13、座框安装板135。
图1至图7所示的机械伸展装置实施为铁架落地式的机械伸展装置，在该实施方式中，支撑结构12包括底座121、第一支撑件122和第二支撑件123。所述底座121包括设置在左侧和右侧的两个镜像对称的侧轨1211，并且优选地还包括将两个侧轨1211相连的前横轨1212和后横轨1213。第一支撑件122以其下端与侧轨1211的前端铰接，并且第二支撑件123以其下端与侧轨1211的后端铰接。
联动结构13包括侧板131、第一联动件132、第二联动件133、第三联动件134、座框枢转杆136和升降组件124。其中，第二联动件133的中部与侧板131转动连接，第二联动件133一端与第一联动件132的一端连接，第一联动件132的另一端与第一支撑件122连接，第二联动件133的另一端与第三联动件134的一端连接，第三联动件134另一端与腿部伸展结构3可枢转地连接。在图1至图7所示的实施方式中，所述座框安装板135在其前端与侧板131的前端在第一铰接点137处铰接，在座椅安装板135的相对置的自由端与座框枢转杆136的一端在第二铰接点138处铰接，其中，座框枢转杆136的另一端与联动结构13、具体而言与联动结构13的升降组件124中的升降连动件1241铰接。
如图5至图7所示，升降组件124包括：升降连动件1241、第一升降连杆1242和第二升降连杆1243。升降组件124设置在第一支撑件122和第二支撑件123之间。
如图5所示，升降连动件1241设有支撑连接点1241a、传动连接点1241b、背部连接点1241c和联动连接点1241d，其中，所述支撑连接点1241a与支撑结构12的第二支撑件123可枢转地耦连，所述传动连接点1241b与第一升降连杆1242的一端可枢转地耦连，第一升降连杆1242的另一端通过第二升降连杆1243与第一支撑件122可枢转地连接；所述背部连接点1241c与背部机 构2的背部连杆22可枢转地耦连，所述联动连接点1241d与联动结构13的侧板131可枢转地耦连。
如图7所示，在该实施方式中，所述传动连接点1241b与所述支撑连接点1241a之间具有第一距离L1，所述传动连接点1241b与所述背部连接点1241c之间具有第二距离L2，所述第一距离L1与第二距离L2的比值范围为0.95至0.75。
在所述座框安装板135上构造有支承凸缘1351，所述支承凸缘优选实施为与座框安装板135一体式构造。
具体地，背部机构2包括与靠背附接的靠背连接件21和与其可枢转地连接的背部连杆22。靠背连接件21与联动结构13的侧板131的后端铰接。
具体地，腿部伸展结构3由多个相互枢转连接的连杆构成，其中，所述第一腿部连杆31的后端与联动结构13的侧板131铰接，第一腿部连杆31的前端与第二腿部连杆32的后端铰接，第三腿部连杆33的后端与侧板131的前端铰接，第三腿部连杆33的前端与第四腿部连杆34的后端铰接，第二腿部连杆32和第四腿部连杆34分别在其前端与搁脚件35铰接，其中，所述第二腿部连杆32靠近所述第一腿部连杆31的一端设置有第一连接点321，所述第二腿部连杆32在所述第一连接点321处与所述第三腿部连杆33的中部铰接。
具体地，联动支架1还包括传动结构14，传动结构14包括相连接的第一传动件141和第二传动件142。第一传动件141一端与第二传动件142铰接，另一端与驱动装置、优选电动驱动装置直接或间接地连接。优选地如图1所示，第一传动件141的一端与第二传动件141的一端铰接，第一传动件141的另一端与侧板131附接并经由枢转连杆与电动驱动装置8连接，第二传动件142的另一端与腿部伸展结构3的第一腿部连杆31连接。驱动装置用于通过传动结构驱动联动支架移动。在一些实施方式中，电动驱动装置可以为推杆电机或滑块电机驱动装置，优选为线性电机；在另一些实施方式中，驱动装置可以为手动驱动装置。
根据本实施方式，通过联动支架1的移动带动背部机构2和腿部伸展装置3伸展或收缩，从而使机械伸展装置能够实现座椅单元在图2、图5所示的坐姿状态、图3、图6所示的休闲姿状态与图4、图7所示的躺姿状态之间的变换，或者在坐姿状态与躺姿状态之间的直接变换。
在图1至图7所示的实施方式中，以能够在坐姿、休闲姿和躺姿三种姿态之间变换的机械伸展装置为例。在坐姿状态中，搁脚件35收拢在坐席部下方；在休闲姿状态中，搁脚件35伸展至坐席部前方；在躺姿状态中，靠背后仰，使得靠背与坐席部之间的角度相对于在坐姿状态中和休闲姿状态中增大，搁脚件35与在所述休闲姿状态中相比进一步向前且向上延伸。
在座椅单元从图2、图5所示的坐姿状态转变至图3、图6所示的休闲姿状态的过程中，联动结构13带动第一支撑件122向前倾斜，进而带动升降组件124向前移动。在此过程中，座框安装板135以其支承凸缘1351的底侧支承在侧板131上，从而使坐席部在此过程中始终相对于侧板131保持不动。
在座椅单元从图3、图6所示的休闲姿状态转变至图4、图7所示的躺姿状态的过程中，侧板131的前端向上且向前移动，从而使得座框安装板135与侧板131之间的第一铰接点137也随之向上且向前移动，这使得座框安装板135的前端前移和上翘。与此同时，升降组件124的升降连动件1241围绕与第二支撑件123的铰接点枢转，如图6、图7所示，在座椅单元向躺姿状态的转变过程中，升降连动件1241围绕与第二支撑件123的铰接点沿逆时针方向枢转，使得座框枢转杆136与升降连动件1241之间的第二铰接点138向上移动，从而使座框枢转杆136推动座框安装板135的后端升高。由此使得座框安装板135的倾斜幅度不那么大。
如图3、图4所示，所述座框安装板135在其前端与侧板131的前端在第一铰接点137处可相对枢转地铰接，由此形成在机械伸展装置的侧面观察的以该第一铰接点137为顶点、以侧板131和座框安装板135的延伸方向为边的第一夹角α。在座椅单元从图3所示的休闲姿状态变换至图4所示躺姿状态的过程中，所述第一夹角α变大，在该实施方式中，所述第一夹角α增大0°至15°、优选增大2°至8°、最优选增大4°至6°。
图8和图9示出另一种铁架落地式的机械伸展装置。图8、图9所示实施方式与图1至图7所示实施方式基本相同，区别仅在于，在图8、图9所示的实施方式中，座椅安装板135以其后端与侧板131的后端铰接。
在该实施方式中，座椅安装板135以其后端与侧板131的后端在第一铰接点137处铰接，在座椅安装板135的相对置的自由端与座框枢转杆136的一端在第二铰接点138处铰接，其中，座框枢转杆136的另一端与联动结构13、具体而言与联动结构13的升降组件124中的升降连动件1241铰接。
通过调整座框枢转杆136与升降连动件1241之间的铰接点在升降连接件1241上的位置，使得在座椅单元的靠背后仰的过程中，座框枢转杆136与升降连动件1241之间的第二铰接点138向前且向下移动，从而通过座框枢转杆136迫使座框安装板135的前端下降。由此使得座框安装板135的倾斜幅度不那么大。
如图8、图9所示，所述座框安装板135在其后端与侧板131的后端在第一铰接点137处可相对枢转地铰接，由此形成以该第一铰接点137为顶点、以侧板131和座框安装板135的延伸方向为边的第一夹角α。在座椅单元从图8所示的休闲姿状态变换至图9所示躺姿状态的过程中，所述第一夹角α变小，在该实施方式中，所述第一夹角α减小0°至15°、优选减小2°至8°、最优选减小4°至6°。
图10至图13b示例性地示出根据本发明的铁架落地式的座椅单元。
如图10所示，所示座椅单元包括根据本发明的机械伸展装置、与所述机械伸展装置附接的扶手4、用于附接坐席部的座框5、靠背6、脚凳7、电动驱动装置。在该实施方式中，所述机械伸展装置通过支撑结构12的底座121可活动地支撑在地面上。
图11a、图11b示出处于坐姿状态下的座椅单元，其中，靠背6基本保持垂直，附接在搁脚件上的脚凳7收拢在坐席部下方。
图12a、图12b示出处于休闲姿状态下的座椅单元，其中，腿部伸展装置带动脚凳7向前且向上伸展，座框5相对于靠背6基本上保持不动。
图13a、图13b示出处于躺姿状态下的座椅单元，其中，靠背6后仰，座框5的前端向上倾斜，然而与现有技术相比，其倾斜角度显著降低。
为清楚起见，图11b、图12b和图13b中去除了一侧的扶手。
根据本发明的座椅单元能够在图11a至图13b所示的坐姿、休闲姿与躺姿状态之间变换，也能够从图11a、图11b所示的坐姿状态直接变换至图13a、图13b所示的躺姿状态或反向变换。
图14、图15示例性地示出根据本发明的扶手落地式的座椅单元。
为清楚起见，去除了在坐姿状态下收拢在坐席部下方的脚凳。如图14所示，所示座椅单元包括根据本发明的机械伸展装置、与所述机械伸展装置附接的扶手4、用于附接坐席部的座框5、靠背6、电动驱动装置以及未示出的脚凳。在该实施方式中，扶手4分别与支撑结构12的底座固定连接，并且扶手 4的底面也支撑在地面上。
图15示出了处于坐姿状态下的座椅单元的侧视图，其中，为清楚起见，去除了一侧的扶手。
如图12b和图13b所示，在机械伸展装置或者说座椅单元的侧面观察，用于支承坐席部5的支承凸缘1351与水平方向成第二夹角β。在座椅单元从休闲姿状态转变至躺姿状态的过程中，所述第二夹角β变大，其中优选地，在躺姿状态中，所述第二夹角β为10°与18°之间、最好为14°与16°之间的角度。在此状态下，腿部伸展结构3的最高点相对于地面的高度为400mm至600mm、优选为554mm。
上述说明已经充分揭露了本发明的具体实施方式。需要指出的是，熟悉该领域的技术人员对本发明的具体实施方式所做的任何改动均不脱离本发明的权利要求书的范围。相应地，本发明的权利要求的范围也并不仅仅局限于前述具体实施方式。
附图标记清单
1              联动支架
12             支撑结构
121            底座
1211           侧轨
1212           前横轨
1213           后横轨
122            第一支撑件
123            第二支撑件
124            升降组件
1241           升降连动件
1242           第一升降连杆
1243           第二升降连杆
13             联动结构
131            侧板
132            第一联动件
133            第二联动件
134            第三联动件
135            座框安装板
1351           支承凸缘
136            座框枢转杆
137            第一铰接点
138            第二铰接点
14             传动结构
141            第一传动件
142            第二传动件
2              背部机构
21             靠背连接件
22             背部连杆
3              腿部伸展装置
31             第一腿部连杆
32             第二腿部连杆
321            第一连接点
33             第三腿部连杆
34             第四腿部连杆
4              扶手
5              座框
6              靠背
7              脚凳
8              电动驱动装置
α              第一夹角
β              第二夹角
L1             第一距离
L2             第二距离。

Claims (13)

  1. 一种用于可活动的座椅单元的机械伸展装置，包括：
    -联动支架(1)，所述联动支架包括用于可活动地支撑机械伸展装置的支撑结构(12)、与座椅单元的坐席部可活动地连接的联动结构(13)和用于附接坐席部的座框安装板(135)，所述联动结构(13)具有侧板(131)；
    -背部机构(2)，所述背部机构(2)与联动支架(1)可枢转连接并且用于与座椅单元的靠背附接；
    -带有搁脚件的腿部伸展结构(3)，所述腿部伸展结构(3)与联动支架(1)可枢转地连接并且所述搁脚件与座椅单元的脚凳附接；
    其中，所述座框安装板(135)与联动结构(13)、优选与侧板(131)在第一铰接点(137)处可相对枢转地铰接，由此形成优选以该第一铰接点(137)为顶点、以侧板(131)和座框安装板(135)的延伸方向为边的第一夹角(α)，在靠背为实现座椅单元向躺姿状态变换的后仰过程中，所述座框安装板(135)与联动结构(13)、优选侧板(131)通过枢转机构优选绕第一铰接点(137)相对枢转并导致所述第一夹角(α)的变化。
  2. 根据权利要求1所述的机械伸展装置，其特征在于，在靠背的后仰过程中，所述第一夹角(α)变化0°至15°、优选变化2°至8°、最优选变化4°至6°。
  3. 根据权利要求1或2所述的机械伸展装置，其特征在于，当所述第一铰接点(137)设置在所述座框安装板(135)的前端时，在靠背的后仰过程中，所述第一夹角(α)变大；而当所述第一铰接点(137)设置在所述座框安装板(135)的后端时，在靠背的后仰过程中，所述第一夹角(α)变小。
  4. 根据权利要求3所述的机械伸展装置，其特征在于，所述联动结构(13)包括升降组件(124)，当所述第一铰接点(137)设置在所述座框安装板(135)的前端时，在靠背的后仰过程中，所述升降组件(124)促使坐席部的后端向上抬升；当所述第一铰接点(137)设置在所述座框安装板(135)的后端时，在靠背的后仰过程中，所述升降组件(124)促使坐席部的前端向下降低。
  5. 根据权利要求4所述的机械伸展装置，其特征在于，所述枢转机构被设计为座框枢转杆(136)，其中，当所述第一铰接点(137)设置在所述座框安装板(135)的前端时，座框安装板(135)在其后端与座框枢转杆(136)的一端在第二 铰接点(138)处铰接，其中，座框枢转杆(136)的另一端与联动结构(13)、优选与所述升降组件(124)铰接。
  6. 根据权利要求5所述的机械伸展装置，其特征在于，所述升降组件(124)包括升降连动件(1241)，所述升降连动件(1241)与所述座框枢转杆(136)可枢转地连接，当所述第一铰接点(137)设置在所述座框安装板(135)的前端时，在靠背的后仰过程中，所述升降连动件(1241)枢转，使得座框枢转杆(136)与座框安装板(135)之间的第二铰接点(138)上升，从而将座框安装板(135)的后端向上抬升；当所述第一铰接点(137)设置在所述座框安装板(135)的后端时，在靠背的后仰过程中，所述升降连动件(1241)枢转，使得座框枢转杆(136)与座框安装板(135)之间的第二铰接点(138)下降，从而将座框安装板(135)的前端向下降低。
  7. 根据权利要求6所述的机械伸展装置，其特征在于，所述升降组件(124)还包括第一升降连杆(1242)和第二升降连杆(1243)，其中优选地，升降连动件(1241)分别与支撑结构(12)、第一升降连杆(1242)、背部机构(2)、联动结构(13)可枢转地耦连。
  8. 根据权利要求7所述的机械伸展装置，其特征在于，所述升降连动件(1241)设有支撑连接点(1241a)、传动连接点(1241b)、背部连接点(1241c)和优选联动连接点(1241d)，其中，所述支撑连接点(1241a)与支撑结构(12)、优选支撑结构(12)的第二支撑件(123)可枢转地耦连，所述传动连接点(1241b)与第一升降连杆(1242)可枢转地耦连，所述背部连接点(1241c)与背部机构(2)可枢转地耦连，优选地，所述联动连接点(1241d)与联动结构(13)、优选所述联动结构(13)的侧板(131)可枢转地耦连，并且其中优选地，所述传动连接点(1241b)与所述支撑连接点(1241a)之间具有第一距离(L1)，所述传动连接点(1241b)与所述背部连接点(1241c)之间具有第二距离(L2)，所述第一距离(L1)与第二距离(L2)的比值范围为0.95至0.75。
  9. 根据上述权利要求中任一项所述的机械伸展装置，其特征在于，坐席部与水平方向成第二夹角(β)，其中，在靠背的后仰过程中，所述第二夹角(β)变大。
  10. 根据权利要求9所述的机械伸展装置，其特征在于，在靠背完全后仰的状态下，所述第二夹角(β)为10°与18°之间、最好为14°与16°之间的角度，并且腿部伸展结构(3)的最高点相对于地面的高度为400mm至600mm、优选 为554mm。
  11. 一种可活动的座椅单元，该座椅单元包括：根据上述权利要求中任一项所述的机械伸展装置、与所述机械伸展装置附接的扶手、坐席部、靠背、脚凳，优选包括电动驱动装置。
  12. 根据权利要求11所述的座椅单元，其特征在于，所述机械伸展装置通过支撑结构(12)可活动地支撑在地面上。
  13. 根据权利要求11所述的座椅单元，其特征在于，所述机械伸展装置的支撑结构(12)可活动地附接在扶手上，所述扶手的底面支撑在地面上。
PCT/CN2022/114258 2022-07-22 2022-08-23 用于可活动的座椅单元的机械伸展装置及座椅单元 WO2024016418A1 (zh)

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CN113892772A (zh) * 2021-10-27 2022-01-07 锐迈机械科技（吴江）有限公司 用于可活动的座椅单元的机械伸展装置及座椅单元
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