CN113475898A - Mechanical stretching device - Google Patents
Mechanical stretching device Download PDFInfo
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- CN113475898A CN113475898A CN202110940890.4A CN202110940890A CN113475898A CN 113475898 A CN113475898 A CN 113475898A CN 202110940890 A CN202110940890 A CN 202110940890A CN 113475898 A CN113475898 A CN 113475898A
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- hinged
- adjusting rod
- connecting rod
- leg
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- 238000009434 installation Methods 0.000 claims description 7
- 230000036544 posture Effects 0.000 description 11
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007812 deficiency Effects 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
- 238000006467 substitution reaction Methods 0.000 description 1
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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 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
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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
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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
The present invention provides a mechanical stretching apparatus, wherein the mechanical stretching apparatus comprises: the seat unit comprises a mounting plate, and a mounting plane is configured on the mounting plate; a link structure connected to the mounting plate through a first rivet point and a second rivet point on the mounting plate; the leg unit is connected with the mounting plate through a third riveting point and a fourth riveting 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; the vertical distance between the circle center of the fourth riveting point and the extension line of the mounting plane of the mounting plate is not more than 10 mm.
Description
Technical Field
The invention relates to a mechanical stretching device.
Background
In the existing sofas, seats or wheelchairs, which are usually internally equipped with an electric or manual mechanical extension device, the adjustment of the sofa, seat or wheelchair can be realized so that the sofa, seat or wheelchair can be switched between different states. A prior art mechanical stretching apparatus for an armrest floor sofa includes a seat unit, a leg unit, a backrest unit, a link structure, and a driving unit, which controls stretching of the leg unit and angle adjustment of the backrest unit by the driving unit. The mechanical stretching devices for armrests on sofas of the prior art have the following drawbacks: the leg unit, the connecting rod structure and the seat unit are unreasonable in matching design, so that the overall height of the mechanical stretching device is high, and the size control is not facilitated; the seat unit is provided with a connecting part for installing a wooden frame, and the structure of the seat unit is relatively complex; in order to reduce the sitting height, the wooden frame is sunk and installed on the inner side of the installation plate of the seat unit, a certain gap is formed between the wooden frame and the inner side of the installation plate, dust is easy to accumulate and damage, and the stability is poor; the connecting rod structure is unreasonable in structural design, so that the operation is not smooth enough, and the use experience is influenced; the structural strength of the back unit is low, so that it may be easily damaged in use.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned deficiencies in the prior art and providing a mechanical stretching apparatus with a reasonable design.
The technical scheme adopted by the embodiment of the invention for solving the problems is as follows: a mechanical stretching apparatus, 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 link structure connected to the mounting plate through a first rivet point and a second rivet 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; the vertical distance between the circle center of the fourth riveting point and the extension line of the mounting plane of the mounting plate is not more than 10 mm.
In the embodiment of the invention, the circle center of the fourth riveting point is positioned above the mounting plane, and the vertical distance between the circle center of the fourth riveting point and the extension line of the mounting plane of the mounting plate is not more than 1 mm.
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, and 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, and the other end of the second connecting rod is hinged to the third connecting rod; 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 also 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; wherein one end of the second control link is hinged to the first control link, and the other end thereof is hinged to the third control link; one end of the fourth control connecting rod is hinged with the first control connecting rod, and the other end of the fourth control connecting rod is hinged with the third control connecting rod; 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 also comprises a fifth control connecting rod, a sixth control connecting rod and a seventh control connecting rod; wherein one end of the fifth control link is hinged to the fourth control link, and the other end thereof is hinged to the third link; one end of the sixth control connecting rod is hinged with the second control connecting rod, and the other end of the sixth control connecting rod is hinged with the third connecting rod; one end of the seventh control link is hinged to one end of the second control link, and the other end thereof is hinged to the third link.
The backrest unit comprises a fixing plate, a first backrest adjusting rod, a second backrest adjusting rod, a third backrest adjusting rod and a fourth backrest adjusting rod, wherein the fixing plate is fixed on the mounting plate, and one end of the first backrest adjusting rod is hinged to the fixing plate; the third backrest adjusting rod is hinged to the fixing plate and provided with the first arm and the second arm; one end of the second backrest adjusting rod is hinged with the first backrest adjusting rod, and the other end of the second backrest adjusting rod is hinged with the first arm of the third backrest adjusting rod; the second arm of the third backrest adjusting rod is hinged with the fourth backrest adjusting rod, and the fourth backrest adjusting rod is hinged with 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; one end of the first leg adjusting rod is hinged with the fourth leg adjusting rod, and the middle position of the first leg adjusting rod is hinged with the second leg adjusting rod; the third leg adjusting rod is provided with a first hinge point, a second hinge point and a third hinge point, one end of the second leg adjusting rod is hinged to the first hinge point of the third leg adjusting rod, the fourth leg adjusting rod is hinged to the second hinge point of the third leg adjusting rod, and the other end of the fourth leg adjusting rod, relative to the first leg adjusting rod, is hinged to the sixth leg adjusting rod; one end of the fifth leg adjusting rod is hinged to a third hinge point of the third leg adjusting rod, and the other end of the fifth leg adjusting rod is hinged to the seventh leg adjusting rod; one end of the seventh leg adjusting rod is hinged to the third riveting point of the mounting plate; one end of the sixth leg adjusting rod is hinged to a fourth riveting point of the mounting plate, and the middle position of the sixth leg adjusting rod is hinged to the middle position of the fifth leg adjusting rod.
The leg unit of 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 support, a second support and a telescopic unit, and two ends of the telescopic unit are respectively connected with the first support and the second support; the first bracket is connected with the first control connecting rod; the second support is connected with the seventh leg adjusting rod.
In the embodiment of the invention, when the mechanical stretching device is in a sitting posture state, 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, and when the mechanical stretching device is in the sitting posture state, the distance between the intersection point A and the ground is 255-264 mm.
In the embodiment of the invention, when the mechanical stretching device is arranged on any one of a sofa, a seat or a wheelchair and the 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 abdicating holes.
Compared with the prior art, the invention has one or more of the following advantages or effects: the structure is simple, and the design is reasonable; the adjustment of various states of the seat frame can be completed only by one power unit, so that the cost is relatively reduced; the connecting rod structure and the control structure are more compact in structure and more reasonable in design, so that the adjusting and running of the connecting rod structure and the control structure are smoother, and the use comfort is improved; the structural strength of the backrest unit is improved, and the backrest unit is not easy to damage when in use; the overall height of the sofa can be reduced by arranging the first riveting point, the second riveting point, the third riveting point and the fourth riveting point, the requirement of low sitting height of the sofa can be met, further, the overall thickness of the mechanical stretching device can be reduced, namely, under the condition of unchanged sitting height, the bottom space of the sofa can be increased, and the application direction of the sofa can be extended to a high-leg sofa or a storage functional sofa; wooden frame can direct mount in mounting plane, and wooden frame is seamless with the mounting panel side, and stability reinforcing and installation are more convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
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 posture.
Fig. 2 is a schematic perspective view of the mechanical stretching device in the embodiment of the present invention, showing the mechanical stretching device in a sitting posture.
Fig. 3 is a schematic view of the seat unit, linkage structure, foot unit, back unit and control structure in cooperation, shown in a sitting position.
FIG. 4 is a schematic view of the seat unit, linkage structure, foot unit, backrest unit and control structure in cooperation, shown in a relaxed position.
Fig. 5 is a first schematic view of the seat unit, the link structure, the foot unit, the backrest unit and the control structure in cooperation, showing in a lying position.
Fig. 6 is a second schematic view of the seat unit, the link structure, the foot unit, the backrest unit and the control structure, showing in a lying position.
Fig. 7 is a third schematic view of the seat unit, the link structure, the foot unit, the backrest unit and the control structure, showing 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 below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Referring to fig. 1 to 9, the mechanical stretching apparatus of the present embodiment, which is suitable for a sofa, a seat or a wheelchair, especially for an electric armchair, comprises 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 link construction 4 and the control construction 5 form a suspension mechanism for the mechanical stretching unit.
The seat unit 1 in this embodiment includes a mounting plate 11. A mounting plane 111 is disposed above the mounting plate 11, and the mounting plane 111 is formed directly on the mounting plate 11 by bending and is used for mounting the wood frame 7. Specifically, the wood frame 7 may be directly placed on the installation plane 111 for fixing. When the mechanical stretching device is installed on any one of a sofa, a seat or a wheelchair and 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 1111 and a second rivet 1112 on the mounting plate 11. The leg unit 2 in this embodiment is connected to the mounting plate 11 through the third rivet 1113 and the fourth rivet 1114 on the mounting plate 11. As shown in fig. 3, in the use state, the first rivet 1111, the second rivet 1112, and the third rivet 1113 are all located below the mounting plane 111.
In some embodiments, when the mechanical extension apparatus is in use, the first rivet point 1111, the second rivet point 1112, the third rivet point 1113, and the fourth rivet point 1114 are respectively not 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). In some embodiments, the perpendicular distance between the fourth rivet point 1114 and the extension of the mounting plane 111 of the mounting plate 11 is no more than 10mm when the mechanical stretching apparatus is in use. In some embodiments, when the mechanical extension apparatus is in use, the center of the fourth rivet 1114 is located above the mounting plane and the perpendicular distance between the center of the fourth rivet 1114 and the extension line of the mounting plane 111 of the mounting plate 11 is not more than 1 mm.
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 when the mechanical extension apparatus 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 when the mechanical extension apparatus is in use. Further preferably, in some embodiments, when the mechanical extension device is in the use state, the fourth riveting point 1114 is not lower than the mounting plane 111 in the extension direction of the length direction of the mounting plane 111, that is, in the projection along the length direction of the mounting plane 111, the fourth riveting point 1114 is coincident with the mounting plane 111 or is not higher than 1mm higher than the mounting plane. The distance in this embodiment refers to a perpendicular distance from a center point or a center point of the rivet point to the mounting plane 111 or an extension line of the mounting plane 111.
As shown in fig. 3, in this embodiment, the intersection point of the extension line of the mounting plane 111 and the extension line of the outer side of the leg unit 2 is a in the sitting posture, and the distance H between the intersection point a and the ground is 255mm to 264mm when the mechanical stretching device is in the use state.
The link structure 4 in this embodiment is connected to the mounting plate 11 and specifically includes 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 used for the mechanical stretching device. 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, and 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 the 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 by a rivet, the perpendicular distance between the second riveting 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 point of the first link 41 and the third link 43 and the hinge point 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 linkage adjusting rod 28, and the linkage adjusting rod 28 is connected to the leg unit 2, so that the linkage structure 4 and the leg unit 2 are linked. The first link 41 in the present embodiment has a substantially 1-shaped configuration.
The first link 41, the second link 42, and the third link 43 in this embodiment and the mechanical stretching device (mounting plate 11) to which they are connected form a first four-link structure.
The backrest unit 3 in this embodiment is provided on the mounting plate 11. The backrest adjusting mechanism specifically comprises a fixing 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 fixing plate 31 is fixed on the 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 fixing plate 31, and when the first backrest adjusting rod 32 rotates by taking a hinged point of the first backrest adjusting rod 32 and the fixing plate 31 as an axis, the angle of the mounting part 321 can be adjusted; the third backrest adjustment lever 34 is hinged to the fixed plate 31 and has a first arm 341 and a second arm 342; one end of the second back adjustment lever 33 is hinged to the first back adjustment lever 32, and the other end thereof is hinged to the first arm 341 of the third back adjustment lever 34; the second arm 342 of the third back adjustment lever 34 is hinged with the fourth back adjustment lever 35; the fourth backrest adjustment lever 35 is connected to the control structure 5, so that the 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 body portion 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 rib 314, and the rib 314 is provided on the body portion 311 and extends at least to the first support arm 312. Further, the reinforcing rib 314 extends to the second support arm 313. When the backrest unit is used, the first support arm 312 bears the weight of a user leaning against, so that the arrangement of the reinforcing rib 314 can improve the weight of the backrest unit 3 and improve the structural strength.
The control structure 5 in the present 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 backrest adjusting rod 35 is hinged with the first control connecting rod 51, so that the linkage of the control structure 5 and the backrest unit 3 is realized; 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; the first, second, third and fourth control links 51, 52, 53 and 54 form a second four-link structure.
The first control link 51 in this embodiment is provided with at least one set of abdicating holes 511. To facilitate screwing of the screw below the first control link 51. In this embodiment, the third link 43 is provided with a notch 431, and the notch 431 corresponds to the abdicating hole 511 to perform the abdicating function.
The control structure 5 in this embodiment is connected to the link structure 4 to achieve linkage. Specifically, one end of the fifth control link 55 is hinged to the fourth control link 54 (hinged to the middle position of the fourth control link 54), and the other end thereof is hinged to the third link 43; one end of the sixth control link 56 is hinged to the second control link 52 (hinged to the middle position of the second control link 52), and the other end thereof is hinged to the third link 43; one end of the seventh control link 57 is hinged to one end of the second control link 52, and the other end thereof is hinged to the third link 43. Thereby 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. In the present embodiment, one end of the first leg adjustment lever 21 is hinged to the fourth leg adjustment lever 24, and the middle of the first leg adjustment lever 21 is hinged to the second leg adjustment lever 22; the third leg adjusting rod 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 rod 22 is hinged to the first hinge point 231 of the third leg adjusting rod 23, the fourth leg adjusting rod 24 is hinged (at the middle position thereof) to the second hinge point 232 of the third leg adjusting rod 23, and the other end of the fourth leg adjusting rod 24 relative to the first leg adjusting rod 21 is hinged to the sixth leg adjusting rod 26; one end of the fifth leg adjusting rod 25 is hinged to the third hinge point 233 of the third leg adjusting rod 23, and the other end is hinged to the seventh leg adjusting rod 27; the seventh leg adjusting rod 27 is hinged to the mounting plate 11, specifically, one end of the seventh leg adjusting rod 27 is hinged to the third riveting point 1113 of the mounting plate 11, further, one end of the seventh leg adjusting rod 27 is directly hinged to the third riveting point 1113 of the mounting plate 11 through a rivet, and the perpendicular distance between the third riveting point 1113 and the mounting plane 111 is less than 20mm, 15mm or 13 mm; the sixth leg adjusting lever 26 is hinged to the mounting plate 11, specifically, one end of the sixth leg adjusting lever 26 is hinged to a fourth riveting point 1114 of the mounting plate 11, further, one end of the sixth leg adjusting lever 26 is directly hinged to the fourth riveting point 1114 of the mounting plate 11 by a rivet, and a perpendicular distance between the fourth hinging point 1111 and the mounting plane 111 or an extension line of the mounting plane 111 is less than 10mm,
further, the fourth hinge point 1111 has a perpendicular distance less than 1mm from the mounting plane 111 or an extension line of the mounting plane 111. The middle position of the sixth leg adjustment lever 26 is hinged to the middle position of the fifth leg adjustment lever 25.
The link adjusting lever 28 in this embodiment has one end hinged to the third link 43 and the other end hinged to the seventh leg adjusting lever 27. When the linkage adjusting rod 28 rotates, the leg unit 2 can be controlled to be linked with the connecting rod 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, and two 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, in particular, the first bracket 61 is connected with the first control link 51; the drive unit 6 is connected to the leg adjustment unit 2, in particular the second bracket 62 is connected to the seventh leg adjustment bar 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 extended and retracted.
The mechanical stretching device in this embodiment has several states in the use state 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 extension device is shown in a sitting position. At this time, the leg adjustment unit 2 is in the folded state, and the mounting portion 321 of the first backrest adjustment lever 32 is perpendicular or substantially perpendicular to the mounting plate 11 of the seat unit 1.
As shown in fig. 4, the mechanical stretching apparatus is shown in a leisure posture. The leg adjustment unit 2 is deployed to provide support for the leg in comparison to a sitting position.
As shown in fig. 5-7, the mechanical stretching device is shown in a lying position. The backrest unit 3 is laid down further than the rest position (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) so that the user can assume a lying position.
The control principle of the mechanical stretching device in this embodiment is as follows: in the sitting posture, the driving unit 6 is in the 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 the seventh leg adjustment lever 27 is pushed by the second bracket 62, the seventh leg adjustment lever 27 rotates with respect to its hinge on the mounting plate 11 and causes the leg unit 2 to unfold; when the telescopic unit 63 continues to be extended, the first bracket 61 thereof pushes the first control link 51, and the first control link 51 can adjust the angle of the backrest unit 3.
In the invention, the connecting rod structure 4 and the control structure 5 have compact structures and reasonable design, so that the adjustment and the operation are smoother, and the use comfort is improved; the structural strength of the backrest unit 3 is improved, and the backrest unit is not easy to damage when in use; since the perpendicular distance between the fourth rivet point 1114 and the extension line of the mounting plane 111 is not more than 10mm, it is preferable that the perpendicular distance between the fourth rivet point 1114 and the extension line of the mounting plane 111 is not more than 1mm, which reduces the height of the mounting plane and the thickness of the mechanical stretching device itself.
The above description of the present invention is intended to be illustrative. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (11)
1. A mechanical stretching apparatus, 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 link structure connected to the mounting plate through a first rivet point and a second rivet 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; the vertical distance between the circle center of the fourth riveting point and the extension line of the mounting plane of the mounting plate is not more than 10 mm.
2. The mechanical stretching apparatus of claim 1, wherein: the circle center of the fourth riveting point is located above the mounting plane, and the vertical distance between the circle center of the fourth riveting point and the extension line of the mounting plane of the mounting plate is not more than 1 mm.
3. A mechanical stretching device according to claim 1 or 2, wherein: 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, and 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, and the other end of the second connecting rod is hinged to the third connecting rod; the first connecting rod, the second connecting rod, the third connecting rod and the mounting plate form a first four-connecting-rod structure.
4. A mechanical stretching apparatus as claimed in claim 3, 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; wherein one end of the second control link is hinged to the first control link, and the other end thereof is hinged to the third control link; one end of the fourth control connecting rod is hinged with the first control connecting rod, and the other end of the fourth control connecting rod is hinged with the third control connecting rod; 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.
5. The mechanical stretching apparatus of claim 4, wherein: 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 link is hinged to the fourth control link, and the other end thereof is hinged to the third link; one end of the sixth control connecting rod is hinged with the second control connecting rod, and the other end of the sixth control connecting rod is hinged with the third connecting rod; one end of the seventh control link is hinged to one end of the second control link, and the other end thereof is hinged to the third link.
6. The mechanical stretching apparatus of claim 4, wherein: the backrest unit comprises a fixing plate, a first backrest adjusting rod, a second backrest adjusting rod, a third backrest adjusting rod and a fourth backrest adjusting rod, wherein the fixing plate is fixed on the mounting plate, and one end of the first backrest adjusting rod is hinged to the fixing plate; the third backrest adjusting rod is hinged to the fixing plate and provided with the first arm and the second arm; one end of the second backrest adjusting rod is hinged with the first backrest adjusting rod, and the other end of the second backrest adjusting rod is hinged with the first arm of the third backrest adjusting rod; the second arm of the third backrest adjusting rod is hinged with the fourth backrest adjusting rod, and the fourth backrest adjusting rod is hinged with the first control connecting rod.
7. A mechanical stretching apparatus as claimed in claim 3, wherein: 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; one end of the first leg adjusting rod is hinged with the fourth leg adjusting rod, and the middle position of the first leg adjusting rod is hinged with the second leg adjusting rod; the third leg adjusting rod is provided with a first hinge point, a second hinge point and a third hinge point, one end of the second leg adjusting rod is hinged to the first hinge point of the third leg adjusting rod, the fourth leg adjusting rod is hinged to the second hinge point of the third leg adjusting rod, and the other end of the fourth leg adjusting rod, relative to the first leg adjusting rod, is hinged to the sixth leg adjusting rod; one end of the fifth leg adjusting rod is hinged to a third hinge point of the third leg adjusting rod, and the other end of the fifth leg adjusting rod is hinged to the seventh leg adjusting rod; one end of the seventh leg adjusting rod is hinged to the third riveting point of the mounting plate; one end of the sixth leg adjusting rod is hinged to a fourth riveting point of the mounting plate, and the middle position of the sixth leg adjusting rod is hinged to the middle position of the fifth leg adjusting rod.
8. The mechanical stretching apparatus of claim 7, wherein: the leg unit 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.
9. The mechanical stretching apparatus of claim 5, wherein: the device also comprises a driving unit, wherein the driving unit comprises a first support, a second support and a telescopic unit, and two ends of the telescopic unit are respectively connected with the first support and the second support; the first bracket is connected with the first control connecting rod; the second support is connected with the seventh leg adjusting rod.
10. A mechanical stretching device according to claim 1 or 2, wherein: when the mechanical stretching device is in a sitting posture state, 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, and when the mechanical stretching device is in the sitting posture state, the distance between the intersection point A and the ground is 255-264 mm.
11. A mechanical stretching device according to claim 1 or 2, wherein: when the mechanical stretching device is arranged on any one of the sofa, the seat or the wheelchair and the sofa, the seat or the wheelchair is placed on the horizontal plane, the included angle between the installation plane and the horizontal plane is 5-10 degrees.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110940890.4A CN113475898A (en) | 2021-08-17 | 2021-08-17 | Mechanical stretching device |
| PCT/CN2022/112900 WO2023020514A1 (en) | 2021-08-17 | 2022-08-17 | Mechanical extension device and suspension mechanism thereof |
| EP22857825.8A EP4368068A1 (en) | 2021-08-17 | 2022-08-17 | Mechanical extension device and suspension mechanism thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110940890.4A CN113475898A (en) | 2021-08-17 | 2021-08-17 | Mechanical stretching device |
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| Publication Number | Publication Date |
|---|---|
| CN113475898A true CN113475898A (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110940890.4A Pending CN113475898A (en) | 2021-08-17 | 2021-08-17 | Mechanical stretching device |
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| Country | Link |
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| CN (1) | CN113475898A (en) |
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| WO2024198797A1 (en) * | 2023-03-24 | 2024-10-03 | 德沃康科技集团有限公司 | Mounting plate used for forming seat unit of sofa frame body and sofa frame body thereof |
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