CN113475898B - A mechanical extension device - Google Patents
A mechanical extension device Download PDFInfo
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- CN113475898B CN113475898B CN202110940890.4A CN202110940890A CN113475898B CN 113475898 B CN113475898 B CN 113475898B CN 202110940890 A CN202110940890 A CN 202110940890A CN 113475898 B CN113475898 B CN 113475898B
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- connecting rod
- hinged
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- 238000009434 installation Methods 0.000 description 13
- 230000036544 posture Effects 0.000 description 8
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- A47C17/00—Sofas; Couches; Beds
- A47C17/86—Parts or details specially adapted for beds, sofas or couches not fully covered by any single one of groups A47C17/02 - A47C17/84
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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
- A47C17/00—Sofas; Couches; Beds
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Nursing (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
本发明提供一种机械伸展装置，其中，所述机械伸展装置包括：座部单元，其包括安装板，所述安装板上配置一安装平面；连杆结构，其通过所述安装板上的第一铆接点和第二铆接点而与所述安装板连接；以及腿部单元，其通过所述安装板上的第三铆接点和第四铆接点与所述安装板实现连接；所述第一铆接点、所述第二铆接点及所述第三铆接点均位于所述安装平面的下方；所述第四铆接点的圆心与所述安装板的安装平面的延伸线的垂直距离不超过10mm。
The present invention provides a mechanical stretching device, wherein the mechanical stretching device includes: a seat unit, which includes a mounting plate, and a mounting plane is arranged on the mounting plate; a connecting rod structure, which is connected to the mounting plate through a first rivet point and a second rivet point on the mounting plate; and a leg unit, which is connected to the mounting plate through a third rivet point and a fourth rivet point on the mounting plate; the first rivet point, the second rivet point and the third rivet point are all located below the mounting plane; the vertical distance between the center of the fourth rivet point and the extension line of the mounting plane of the mounting plate does not exceed 10 mm.
Description
Technical Field
The present invention relates to a mechanical stretching device.
Background
In existing sofas, seats or wheelchairs, an electric or manual mechanical stretching device is usually installed inside the sofa, the seat or the wheelchair can be adjusted, so that the sofa, the seat or the wheelchair can be switched between different states. The mechanical stretching device for the armrest floor sofa in the prior art comprises a seat unit, a leg unit, a backrest unit, a connecting rod structure and a driving unit, wherein the stretching of the leg unit and the angle adjustment of the backrest unit are controlled by the driving unit. The mechanical stretching device for the armrest floor sofa in the prior art has the following defects that the matching design of a leg unit and a connecting rod structure with a seat unit is unreasonable, so that the overall height of the mechanical stretching device is higher, the size control is not facilitated, a connecting part is arranged on the seat unit for installing a wooden frame, the structure is relatively complex, in order to reduce the sitting height, the wooden frame is sunk and arranged on the inner side of a mounting plate of the seat unit, a certain gap is formed between the wooden frame and the inner side of the mounting plate, dust is easy to accumulate and damage, the stability is poor, the structural design of the connecting rod structure is unreasonable, the operation is not smooth enough, the use experience is influenced, the structural strength of a backrest unit is low, and the backrest unit is likely to be damaged easily in use.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the mechanical stretching device with reasonable structural design.
The technical scheme adopted by the embodiment of the invention for solving the problems is that the mechanical stretching device is characterized by comprising:
the seat unit comprises a mounting plate, wherein a mounting plane is arranged on the mounting plate, and the mounting plate is provided with a first riveting point, a second riveting point, a third riveting point and a fourth riveting point;
a connecting rod structure connected with the mounting plate through a first riveting point and a second riveting point on the mounting plate, and
A leg unit connected to the mounting plate through a third rivet point and a fourth rivet point on the mounting plate;
The first riveting point, the second riveting point and the third riveting point are all positioned below the installation plane, and the vertical distance between the center of the fourth riveting point and the extension line of the installation plane of the installation plate is not more than 10mm.
According to the embodiment of the invention, the circle center of the fourth riveting point is positioned above the installation plane, and the vertical distance between the circle center of the fourth riveting point and the extension line of the installation plane of the installation plate is not more than 1mm.
The connecting rod structure comprises a first connecting rod, a second connecting rod and a third connecting rod, wherein one end of the first connecting rod is hinged to a first riveting point of the mounting plate, the other end of the first connecting rod is hinged to the third connecting rod, one end of the second connecting rod is hinged to a second riveting point of the mounting plate, the other end of the second connecting rod is hinged to the third connecting rod, and the first connecting rod, the second connecting rod, the third connecting rod and the mounting plate form a first four-connecting-rod structure.
The embodiment of the invention further comprises a control structure, wherein the control structure comprises a first control connecting rod, a second control connecting rod, a third control connecting rod and a fourth control connecting rod, one end of the second control connecting rod is hinged with the first control connecting rod, the other end of the second control connecting rod is hinged with the third control connecting rod, one end of the fourth control connecting rod is hinged with the first control connecting rod, the other end of the fourth control connecting rod is hinged with the third control connecting rod, and the first control connecting rod, the second control connecting rod, the third control connecting rod and the fourth control connecting rod form a second four-connecting rod structure.
The control structure of the embodiment of the invention further comprises a fifth control connecting rod, a sixth control connecting rod and a seventh control connecting rod, wherein one end of the fifth control connecting rod is hinged with the fourth control connecting rod, the other end of the fifth control connecting rod is hinged with the third connecting rod, one end of the sixth control connecting rod is hinged with the second control connecting rod, the other end of the sixth control connecting rod is hinged with the third connecting rod, one end of the seventh control connecting rod is hinged with one end of the second control connecting rod, and the other end of the seventh control connecting rod is hinged with the third connecting rod.
The embodiment of the invention further comprises a backrest unit, wherein the backrest unit comprises a fixed plate, a first backrest adjusting rod, a second backrest adjusting rod, a third backrest adjusting rod and a fourth backrest adjusting rod, the fixed plate is fixed on the mounting plate, one end of the first backrest adjusting rod is hinged to the fixed plate, the third backrest adjusting rod is hinged to the fixed plate and provided with the first arm and the second arm, one end of the second backrest adjusting rod is hinged to the first backrest adjusting rod, the other end of the second backrest adjusting rod is hinged to the first arm of the third backrest adjusting rod, the second arm of the third backrest adjusting rod is hinged to the fourth backrest adjusting rod, and the fourth backrest adjusting rod is hinged to the first control connecting rod.
The leg unit comprises a first leg adjusting rod, a second leg adjusting rod, a third leg adjusting rod, a fourth leg adjusting rod, a fifth leg adjusting rod, a sixth leg adjusting rod and a seventh leg adjusting rod, wherein one end of the first leg adjusting rod is hinged with the fourth leg adjusting rod, the first leg adjusting rod is hinged with the second leg adjusting rod at the middle position of the first leg adjusting rod, the third leg adjusting rod is provided with a first hinging point, a second hinging point and a third hinging point, one end of the second leg adjusting rod is hinged with the first hinging point of the third leg adjusting rod, the fourth leg adjusting rod is hinged with the second hinging point of the third leg adjusting rod, the other end of the fourth leg adjusting rod is hinged with the sixth leg adjusting rod relative to the other end of the first leg adjusting rod, one end of the fifth leg adjusting rod is hinged with the third hinging point of the third leg adjusting rod, one end of the seventh leg adjusting rod is hinged with the seventh leg adjusting rod, one end of the seventh leg adjusting rod is hinged with the third hinging point of the mounting plate, one end of the fourth leg adjusting rod is hinged with the middle of the fourth leg adjusting rod, and the fourth leg adjusting rod is hinged with the middle of the fourth leg adjusting rod.
The leg unit according to the embodiment of the invention further comprises a linkage adjusting rod, one end of the linkage adjusting rod is hinged with the third connecting rod, and the other end of the linkage adjusting rod is hinged with the seventh leg adjusting rod.
The embodiment of the invention also comprises a driving unit, wherein the driving unit comprises a first bracket, a second bracket and a telescopic unit, two ends of the telescopic unit are respectively connected with the first bracket and the second bracket, the first bracket is connected with the first control connecting rod, and the second bracket is connected with the seventh leg adjusting rod.
In the embodiment of the invention, the intersection point of the extension line of the installation plane and the extension line of the outer side of the leg unit is A when the mechanical stretching device is in a sitting state, and the distance between the intersection point A and the ground is 255 mm-264 mm when the mechanical stretching device is in the sitting state.
According to the embodiment of the invention, when the mechanical stretching device is arranged on any one of a sofa, a seat or a wheelchair, and any one of the sofa, the seat or the wheelchair is placed on a horizontal plane, the included angle between the installation plane and the horizontal plane is 5-10 degrees.
The first control connecting rod is provided with at least one group of abdication holes.
Compared with the prior art, the invention has the advantages or effects of simple structure and reasonable design, can finish the adjustment of various states of the seat frame only by one power unit, relatively reduces the cost, has more compact structure of the connecting rod structure and the control structure, is more reasonable in design, enables the adjustment and operation to be smoother, improves the comfort of use, has improved structural strength of the backrest unit, is not easy to damage during use, can reduce the overall height of the sofa by arranging the first riveting point, the second riveting point, the third riveting point and the fourth riveting point, can meet the requirement of low sitting height, further can reduce the overall thickness of the mechanical stretching device, namely can increase the bottom space of the sofa under the condition of unchanged sitting height, enables the application direction of the mechanical stretching device to extend to the functions of a high-foot sofa or a storage sofa, and has no gap between the wooden frame and the side edge of the mounting plate, and is enhanced in stability and more convenient to install.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic perspective view of a mechanical stretching device according to an embodiment of the present invention, showing the mechanical stretching device in a sitting position.
Fig. 2 is a schematic perspective view of a mechanical stretching device according to the second embodiment of the present invention, which shows the mechanical stretching device in a sitting position.
Fig. 3 is a schematic view of the cooperation of the seat unit, linkage structure, foot unit, backrest unit and control structure, shown in a sitting position.
Fig. 4 is a schematic view of the cooperation of the seat unit, linkage structure, foot unit, backrest unit and control structure, shown in a recreational posture.
Fig. 5 is a schematic illustration of the cooperation of the seat unit, linkage structure, foot unit, backrest unit and control structure, shown in a recumbent position.
Fig. 6 is a second schematic view of the cooperation of the seat unit, linkage structure, foot unit, backrest unit and control structure, shown in a recumbent position.
Fig. 7 is a schematic diagram of the cooperation of the seat unit, linkage structure, foot unit, backrest unit and control structure, shown in a lying position.
Fig. 8 is an enlarged view at a in fig. 5.
Fig. 9 is an enlarged view at B in fig. 2.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and not limited to the following examples.
Referring to fig. 1 to 9, the mechanical stretching device of the present embodiment is applicable to a sofa, a seat or a wheelchair, particularly to a handrail floor-driven sofa, and includes a seat unit 1, a leg unit 2, a backrest unit 3, a link structure 4, a control structure 5 and a driving unit 6. Wherein the linkage structure 4 and the control structure 5 form a suspension mechanism of the mechanical stretching device.
The seat unit 1 in this embodiment includes a mounting plate 11. The upper part of the mounting plate 11 is provided with a mounting plane 111, and the mounting plane 111 is formed directly on the mounting plate 11 by bending and is used for mounting the wooden frame 7. In particular, the wooden frame 7 may be directly placed on the mounting plane 111 for fixation. When the mechanical stretching device is arranged on any one of a sofa, a seat or a wheelchair, and any one of the sofa, the seat or the wheelchair is placed on a horizontal plane, an included angle a between the installation plane and the horizontal plane is 5-10 degrees.
The link structure 4 (suspension mechanism) in the present embodiment is connected to the mounting plate 11 by a first rivet point 1111 and a second rivet point 1112 on the mounting plate 11. The leg unit 2 in this embodiment is connected to the mounting plate 11 by a third rivet 1113 and a fourth rivet 1114 on the mounting plate 11. As shown in fig. 3, in the use state, the first caulking point 1111, the second caulking point 1112, and the third caulking point 1113 are all located below the mounting plane 111.
In some embodiments, the first rivet point 1111, the second rivet point 1112, the third rivet point 1113, and the fourth rivet point 1114 are each no more than 20mm from the vertical distance of the mounting plane 111 of the mounting plate 11 (or the vertical distance of the extension line of the mounting plane 111) when the mechanical extension device is in use. In some embodiments, the fourth rivet point 1114 is no more than 10mm from the line of extension of the mounting plane 111 of the mounting plate 11 when the mechanical stretcher is in use. In some embodiments, the center of the fourth rivet point 1114 is located above the mounting plane and the center of the fourth rivet point 1114 is not more than 1mm from perpendicular to the line of extension of the mounting plane 111 of the mounting plate 11 when the mechanical stretcher is in use.
Preferably, in some embodiments, the fourth rivet point 1114 is located within 10mm above the mounting plane 111 or within 10mm above the lengthwise extension line when the mechanical stretcher is in use. More preferably, in some embodiments, the fourth rivet point 1114 is located within 1mm above the mounting plane 111 or within 1mm above the lengthwise extension line when the mechanical stretcher is in use. It is further preferred that in some embodiments, the fourth rivet point 1114 is not lower than the mounting plane 111 in the extension direction of the length direction of the mounting plane 111 when the mechanical stretcher is in use, i.e. on a projection along the length direction of the mounting plane 111, the fourth rivet point 1114 coincides with the mounting plane 111 or is not more than 1mm above the mounting plane. The distance in this embodiment refers to the perpendicular distance from the center point or center of the rivet point to the mounting plane 111 or the extension line of the mounting plane 111.
In this embodiment, as shown in fig. 3, in the sitting posture state, the intersection point of the extension line of the installation plane 111 and the extension line of the outer side of the leg unit 2 is a, and when the mechanical stretching device is in the use state, the distance H between the intersection point a and the ground is 255 mm-264 mm.
The link structure 4 in this embodiment is connected to the mounting plate 11 and specifically comprises a first link 41, a second link 42 and a third link 43, and the suspension mechanism is connected by the first link 41 and the second link 42 and is used for the mechanical stretching device. Wherein one end of the first link 41 is hinged to the mounting plate 11, specifically, one end of the first link 41 is hinged to a first riveting point 1111 of the mounting plate 11, further, one end of the first link 41 is directly hinged to the first riveting point 1111 of the mounting plate 11 through a rivet, the first hinging point 1111 is located below the mounting plane 111, the vertical distance between the first hinging point 1111 and the mounting plane 111 is less than 20mm, 15mm or 13mm, the other end of the first link 41 is hinged to the third link 43, one end of the second link 42 is hinged to the mounting plate 11, specifically, one end of the second link 42 is hinged to a second riveting point 1112 of the mounting plate 11, further, one end of the second link 42 is directly hinged to the first riveting point 1112 of the mounting plate 11 through a rivet, the vertical distance between the second hinging point 1112 and the mounting plane 111 is less than 20mm, 15mm or 13mm, and the other end of the second link 42 is hinged to the third link 43. The hinge points of the first link 41 and the third link 43 and the hinge points of the second link 42 and the third link 43 are respectively located at two ends of the third link 43. The leg unit 2 in this embodiment further includes a link adjustment lever 28, and the link adjustment lever 28 is connected to the leg unit 2, so that the link structure 4 is linked with the leg unit 2. The first link 41 in this embodiment has a substantially "1" shape.
The first link 41, the second link 42, the third link 43, and the mechanical stretching device (mounting plate 11) to which they are connected in the present embodiment form a first four-bar structure.
The backrest unit 3 in this embodiment is provided on the mounting plate 11. The backrest adjusting mechanism specifically comprises a fixed plate 31, a first backrest adjusting rod 32, a second backrest adjusting rod 33, a third backrest adjusting rod 34 and a fourth backrest adjusting rod 35, wherein the fixed plate 31 is fixed on a mounting plate 11, the first backrest adjusting rod 32 is provided with a mounting part 321 for mounting a backrest, one end of the first backrest adjusting rod 32 is hinged on the fixed plate 31, the angle of the mounting part 321 can be adjusted when the first backrest adjusting rod 32 rotates around the hinge point of the first backrest adjusting rod and the fixed plate 31 as an axis, the third backrest adjusting rod 34 is hinged on the fixed plate 31 and is provided with a first arm 341 and a second arm 342, one end of the second backrest adjusting rod 33 is hinged with the first arm 341 of the third backrest adjusting rod 34, the second arm 342 of the third backrest adjusting rod 34 is hinged with the fourth backrest adjusting rod 35, and the fourth backrest adjusting rod 35 is connected with a control structure 5, so that linkage of the control structure 5 and the backrest unit 3 is realized.
The fixing portion 31 in this embodiment is "U" shaped. Specifically, the fixing portion 31 includes a main body 311, a first support arm 312, and a second support arm 313, the first backrest adjustment lever 32 is hinged to the first support arm 312, and the third backrest adjustment lever 34 is hinged to the second support arm 313. The fixing portion 31 is provided with a reinforcing rib 314, and the reinforcing rib 314 is disposed on the main body portion 311 and extends at least to the first support arm 312. Further, the reinforcing bars 314 extend to the second support arms 313. In use, the first support arm 312 will bear the weight of the user leaning against, and thus the provision of the stiffener 314 can raise the weight of the backrest unit 3 and raise the structural strength.
The control structure 5 in this embodiment includes a first control link 51, a second control link 52, a third control link 53, a fourth control link 54, a fifth control link 55, a sixth control link 56, and a seventh control link 57, the fourth back adjustment lever 35 is hinged to the first control link 51 to thereby realize linkage of the control structure 5 with the back unit 3, one end of the second control link 52 is hinged to the first control link 51 and the other end thereof is hinged to the third control link 53, one end of the fourth control link 54 is hinged to the first control link 51 and the other end thereof is hinged to the third control link 53, and the first control link 51, the second control link 52, the third control link 53, and the fourth control link 54 form a second fourth link structure.
The first control link 51 in this embodiment is provided with at least one set of relief holes 511. To facilitate tightening of the screw below the first control link 51. The third link 43 in this embodiment is provided with a notch 431, and the notch 431 corresponds to the yielding hole 511 to play a yielding role.
The control structure 5 in this embodiment is connected with the link structure 4 to achieve linkage. Specifically, the fifth control link 55 has one end hinged to the fourth control link 54 (hinged to the middle position of the fourth control link 54) and the other end hinged to the third link 43, the sixth control link 56 has one end hinged to the second control link 52 (hinged to the middle position of the second control link 52) and the other end hinged to the third link 43, and the seventh control link 57 has one end hinged to one end of the second control link 52 and the other end hinged to the third link 43. Thus realizing the linkage of the control structure 5 and the connecting rod structure 4.
The leg unit 2 in this embodiment is connected to a mounting plate 11. The leg unit 2 specifically includes a first leg adjustment lever 21, a second leg adjustment lever 22, a third leg adjustment lever 23, a fourth leg adjustment lever 24, a fifth leg adjustment lever 25, a sixth leg adjustment lever 26, and a seventh leg adjustment lever 27. One end of the first leg adjusting lever 21 in the present embodiment is hinged to the fourth leg adjusting lever 24, and the first leg adjusting lever 21 is hinged to the second leg adjusting lever 22 at the middle position thereof; the third leg adjusting lever 23 has a first hinge point 231, a second hinge point 232, and a third hinge point 233, the first hinge point 231, the second hinge point 232, and the third hinge point 233 are not arranged on the same straight line, one end of the second leg adjusting lever 22 is hinged to the first hinge point 231 of the third leg adjusting lever 23, the fourth leg adjusting lever 24 (at a middle position thereof) is hinged to the second hinge point 232 of the third leg adjusting lever 23, and the other end of the fourth leg adjusting lever 24 opposite to the first leg adjusting lever 21 is hinged to the sixth leg adjusting lever 26; one end of the fifth leg adjusting lever 25 is hinged at a third hinge point 233 of the third leg adjusting lever 23 and the other end is hinged with the seventh leg adjusting lever 27, the seventh leg adjusting lever 27 is hinged with the mounting plate 11, specifically, one end of the seventh leg adjusting lever 27 is hinged at a third hinge point 1113 of the mounting plate 11, further, one end of the seventh leg adjusting lever 27 is directly hinged at the third hinge point 1113 of the mounting plate 11 by a rivet, and the vertical distance of the third hinge point 1113 to the mounting plane 111 is less than 20mm, 15mm or 13mm, the sixth leg adjusting lever 26 is hinged with the mounting plate 11, specifically, one end of the sixth leg adjusting lever 26 is hinged at a fourth hinge point 1114 of the mounting plate 11, further, one end of the sixth leg adjusting lever 26 is directly hinged at the fourth hinge point 1114 of the mounting plate 11 by a rivet, and the vertical distance of the fourth hinge point 1111 to the mounting plane 111 or an extension line of the mounting plane 111 is less than 10mm,
Further, the fourth hinge point 1111 is less than 1mm from the mounting plane 111 or the perpendicular distance of the extension line of the mounting plane 111. The middle position of the sixth leg adjusting lever 26 is hinged with the middle position of the fifth leg adjusting lever 25.
One end of the link adjustment lever 28 in this embodiment is hinged to the third link 43, and the other end thereof is hinged to the seventh leg adjustment lever 27. When the linkage adjustment lever 28 rotates, the leg unit 2 is controlled to be linked with the link structure 4.
The drive unit 6 in this embodiment is connected to the control structure 5 and the leg unit 2, respectively. Specifically, the driving unit 2 includes a first bracket 61, a second bracket 62 and a telescopic unit 63, both ends of the telescopic unit 63 are respectively connected with the first bracket 61 and the second bracket 62 to adjust the distance between the first bracket 61 and the second bracket 62, the driving unit 6 is connected with the control structure 5, specifically, the first bracket 61 is connected with the first control link 51, the driving unit 6 is connected with the leg adjusting unit 2, specifically, the second bracket 62 is connected with the seventh leg adjusting lever 27. The telescopic unit 63 in this embodiment may be an electric adjustment structure mainly including a cylinder structure, a motor structure, and the like, so that the telescopic unit 63 can be telescopic.
The mechanical stretching device in the embodiment has a plurality of states when in a use state so as to provide different use postures. Specifically, the mechanical stretching device has a sitting posture state, a leisure posture state and a lying posture state.
As shown in fig. 1-3, the mechanical stretcher is shown in a seated position. At this time, the leg adjusting unit 2 is in a folded state, and the mounting portion 321 of the first backrest adjusting lever 32 is perpendicular or substantially perpendicular to the mounting plate 11 of the seat unit 1.
As shown in fig. 4, the mechanical stretcher is shown in a resting position. The leg adjusting unit 2 thereof is unfolded to provide support for the legs, compared to the sitting posture.
As shown in fig. 5-7, the mechanical stretcher is shown in a recumbent position. The backrest unit 3 is further tilted (the angle between the mounting portion 321 of the first backrest adjustment lever 32 and the mounting plate 11 of the seat unit 1 is increased) to allow the user to lie in the rest position.
The control principle of the mechanical stretching device in this embodiment is that in a sitting posture state, the driving unit 6 is in an initial state (the first bracket 61 and the second bracket 62 are closest to each other), when the telescopic unit 63 pushes the second bracket 62 and pushes the seventh leg adjusting lever 27 through the second bracket 62, the seventh leg adjusting lever 27 rotates with respect to its hinge on the mounting plate 11 and spreads the leg unit 2, and when the telescopic unit 63 continues to be extended, the first bracket 61 pushes the first control link 51, and the first control link 51 can adjust the angle of the backrest unit 3.
The invention has the advantages that the structure of the connecting rod structure 4 and the control structure 5 is compact, the design is reasonable, the adjustment operation is smoother, the use comfort is improved, the structural strength of the backrest unit 3 is improved, the backrest unit is not easy to damage when in use, and the vertical distance between the fourth riveting point 1114 and the extension line of the installation plane 111 is preferably not more than 10mm, the vertical distance between the fourth riveting point 1114 and the extension line of the installation plane 111 is preferably not more than 1mm, the height of the installation plane is reduced, and the thickness of the mechanical stretching device is reduced.
The foregoing description of the invention is merely exemplary of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions, without departing from the scope of the invention as defined in the accompanying claims.
Claims (7)
1. A mechanical stretching device, comprising:
the seat unit comprises a mounting plate, wherein a mounting plane is arranged on the mounting plate, and the mounting plate is provided with a first riveting point, a second riveting point, a third riveting point and a fourth riveting point;
a connecting rod structure connected with the mounting plate through a first riveting point and a second riveting point on the mounting plate, and
A leg unit connected to the mounting plate through a third rivet point and a fourth rivet point on the mounting plate;
the first riveting point, the second riveting point and the third riveting point are all positioned below the mounting plane, and the center of the fourth riveting point is positioned above the mounting plane, wherein the vertical distance between the center of the fourth riveting point and the extension line of the mounting plane of the mounting plate is not more than 10mm;
The connecting rod structure comprises a first connecting rod, a second connecting rod and a third connecting rod, wherein one end of the first connecting rod is hinged at a first riveting point of the mounting plate, and the other end of the first connecting rod is hinged with the third connecting rod;
The control structure comprises a first control connecting rod, a second control connecting rod, a third control connecting rod and a fourth control connecting rod, wherein one end of the second control connecting rod is hinged with the first control connecting rod, and the other end of the second control connecting rod is hinged with the third control connecting rod;
The control structure further comprises a fifth control connecting rod, a sixth control connecting rod and a seventh control connecting rod, wherein one end of the fifth control connecting rod is hinged with the fourth control connecting rod, the other end of the fifth control connecting rod is hinged with the third connecting rod, one end of the sixth control connecting rod is hinged with the second control connecting rod, the other end of the sixth control connecting rod is hinged with the third connecting rod, one end of the seventh control connecting rod is hinged with one end of the second control connecting rod, and the other end of the seventh control connecting rod is hinged with the third connecting rod.
2. The mechanical stretching device according to claim 1, further comprising a back unit including a fixing plate, a first back adjusting lever, a second back adjusting lever, a third back adjusting lever and a fourth back adjusting lever, wherein the fixing plate is fixed to the mounting plate, one end of the first back adjusting lever is hinged to the fixing plate, the third back adjusting lever is hinged to the fixing plate and has a first arm and a second arm, one end of the second back adjusting lever is hinged to the first back adjusting lever, the other end of the second back adjusting lever is hinged to the first arm of the third back adjusting lever, the second arm of the third back adjusting lever is hinged to the fourth back adjusting lever, and the fourth back adjusting lever is hinged to the first control link.
3. The mechanical stretching device according to claim 1, wherein the leg unit comprises a first leg adjusting lever, a second leg adjusting lever, a third leg adjusting lever, a fourth leg adjusting lever, a fifth leg adjusting lever, a sixth leg adjusting lever and a seventh leg adjusting lever, one end of the first leg adjusting lever is hinged with the fourth leg adjusting lever, the first leg adjusting lever is hinged with the second leg adjusting lever at a middle position thereof, the third leg adjusting lever has a first hinge point, a second hinge point and a third hinge point, one end of the second leg adjusting lever is hinged with the first hinge point of the third leg adjusting lever, the fourth leg adjusting lever is hinged with the second hinge point of the third leg adjusting lever, the other end of the fourth leg adjusting lever is hinged with the sixth leg adjusting lever, one end of the fifth leg adjusting lever is hinged with the third hinge point of the third leg adjusting lever, the other end of the fifth leg adjusting lever is hinged with the seventh leg adjusting lever, one end of the seventh leg adjusting lever is hinged with the fourth leg adjusting lever, and the fourth leg adjusting lever is hinged with the middle position thereof.
4. The mechanical stretcher of claim 3, wherein the leg unit further includes a link adjusting lever having one end hinged to the third link and the other end hinged to the seventh leg adjusting lever.
5. The mechanical stretching device according to claim 3, further comprising a driving unit, wherein the driving unit comprises a first bracket, a second bracket and a telescopic unit, two ends of the telescopic unit are respectively connected with the first bracket and the second bracket, the first bracket is connected with the first control connecting rod, and the second bracket is connected with the seventh leg adjusting rod.
6. The mechanical stretching device according to claim 1, wherein the intersection point of the extension line of the mounting plane and the extension line of the outer side of the leg unit is A in the sitting posture, and the distance between the intersection point A and the ground is 255 mm-264 mm in the sitting posture.
7. The mechanical stretching device according to claim 1, wherein when the mechanical stretching device is mounted on any one of a sofa, a seat or a wheelchair, and any one of the sofa, the seat or the wheelchair is placed on a horizontal plane, an included angle between the mounting plane and the horizontal plane is 5-10 degrees.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110940890.4A CN113475898B (en) | 2021-08-17 | 2021-08-17 | A mechanical extension device |
| PCT/CN2022/112900 WO2023020514A1 (en) | 2021-08-17 | 2022-08-17 | Mechanical extension device and suspension mechanism thereof |
| EP22857825.8A EP4368068A4 (en) | 2021-08-17 | 2022-08-17 | Mechanical extension device and suspension mechanism therefor |
| EP25151920.3A EP4527254A3 (en) | 2021-08-17 | 2022-08-17 | Mechanical extension device and suspension mechanism thereof |
| US18/292,400 US20250082099A1 (en) | 2021-08-17 | 2022-08-17 | Mechanical Extension Device and Suspension Mechanism Thereof |
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| CN202110940890.4A CN113475898B (en) | 2021-08-17 | 2021-08-17 | A mechanical extension device |
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| CN113475898A CN113475898A (en) | 2021-10-08 |
| CN113475898B true CN113475898B (en) | 2024-12-13 |
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| EP4527254A3 (en) * | 2021-08-17 | 2025-07-23 | DewertOkin Technology Group Co., Ltd. | Mechanical extension device and suspension mechanism thereof |
| CN219556778U (en) * | 2023-03-24 | 2023-08-22 | 德沃康科技集团有限公司 | Mounting plate for seat unit forming sofa frame and sofa frame thereof |
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| CN208957347U (en) * | 2018-01-16 | 2019-06-11 | 锐迈机械科技（吴江）有限公司 | A kind of function mechanical extending device for sofa |
| CN113040555A (en) * | 2019-12-27 | 2021-06-29 | 顾家家居股份有限公司 | Mechanical stretching device for movable seat or functional sofa |
| CN215533081U (en) * | 2021-08-17 | 2022-01-18 | 德沃康科技集团有限公司 | Mechanical stretching device |
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| WO2014183112A2 (en) * | 2013-05-10 | 2014-11-13 | L & P Property Management Company | Linkage mechanism for hi-leg seating unit |
| CN106263778B (en) * | 2016-10-19 | 2018-12-18 | 礼恩派(嘉兴)有限公司 | Mechanical extending device and seat unit including the mechanical extending device |
| CN108260984A (en) * | 2018-01-16 | 2018-07-10 | 锐迈机械科技（吴江）有限公司 | A kind of function mechanical extending device for sofa |
| CN208850945U (en) * | 2018-04-28 | 2019-05-14 | 浙江飞力科技股份有限公司 | A kind of electromechanical extension device |
| CN112741445B (en) * | 2019-10-31 | 2025-05-02 | 顾家家居股份有限公司 | A sofa suspension mechanism and use method thereof |
| CN112716194B (en) * | 2021-01-18 | 2024-11-26 | 德沃康科技集团有限公司 | Sofa stretching device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN208957347U (en) * | 2018-01-16 | 2019-06-11 | 锐迈机械科技（吴江）有限公司 | A kind of function mechanical extending device for sofa |
| CN113040555A (en) * | 2019-12-27 | 2021-06-29 | 顾家家居股份有限公司 | Mechanical stretching device for movable seat or functional sofa |
| CN215533081U (en) * | 2021-08-17 | 2022-01-18 | 德沃康科技集团有限公司 | Mechanical stretching device |
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