Patent Application
20250082099
This application claims priority to Chinese Patent Application No. 202121921433.2 filed Aug. 17, 2021, Chinese Patent Application No. 202110940890.4 filed Aug. 17, 2021, Chinese Patent Application No. 202110940906.1 filed Aug. 17, 2021, and Chinese Patent Application No. 202121921465.2 filed Aug. 17, 2021, the disclosures of which are incorporated herein by reference in their entireties.
The present application relates to a mechanical extension device and a suspension mechanism thereof.
In the related art, a sofa, seat, or wheelchair can be adjusted through an electric or manual mechanical extension device that is generally installed inside so that the sofa, seat, or wheelchair can be switched between different states. A mechanical extension device for a floor sofa with armrests in the related art includes a seat unit, a leg unit, a backrest unit, a link structure, and a drive unit, where the drive unit controls the extension of the leg unit and the angle adjustment of the backrest unit. The mechanical extension device for the floor sofa with armrests in the related art has the following disadvantages: the mating of the leg unit and the link structure with the seat unit is designed unreasonable, which leads to a relatively high overall height of the mechanical extension device and is not conducive to size control; connecting components are installed on the seat unit to install a wooden frame, but the connecting components are relatively complicated in structure; to reduce a sitting height, the wooden frame is sunk and installed on the inner side of a mounting plate of the seat unit, and a certain interstice exists between the wooden frame and the inner side of the mounting plate, which is prone to dust accumulation and damage and causes poor stability; the structural design of the link structure is unreasonable, resulting in unsmooth operation and affecting user experience, and the link structure has the problem of low structural strength; and the backrest unit has relatively low structural strength and is likely to be easily damaged during use.
The present application provides a mechanical extension device and a suspension mechanism thereof, which can solve the technical problem in the related art of an unreasonable structural design of a link structure, resulting in unsmooth operation and affecting user experience.
An embodiment provides a suspension mechanism. The suspension mechanism is mounted on a mounting plate of a mechanical extension device and includes a link structure configured to be connected to the mounting plate and including a first link, a second link, and a third link, where a first end of the first link is configured to be hinged to the mounting plate, and a second end of the first link is hinged to the third link; a first end of the second link is configured to be hinged to the mounting plate, and a second end of the second link is hinged to the third link; and the first link, the second link, the third link, and the mounting plate configured to constitute a first four-bar structure; and a control structure connected to the link structure and including a first control link, a second control link, a third control link, and a fourth control link; where a first end of the second control link is hinged to the first control link, and a second end of the second control link is hinged to the third control link; a first end of the fourth control link is hinged to the first control link, and a second end of the fourth control link is hinged to the third control link; and the first control link, the second control link, the third control link, and the fourth control link constitute a second four-bar structure.
An embodiment of the present application provides a mechanical extension device including the preceding suspension mechanism and a seat unit, where the seat unit includes the mounting plate and a mounting plane, and the mounting plate is configured for mounting the suspension mechanism.
An embodiment of the present application provides another mechanical extension device. The mechanical extension device includes a seat unit including a mounting plate, where the mounting plate is configured with a mounting plane and has a first rivet point, a second rivet point, a third rivet point, and a fourth rivet point; a link structure configured to be connected to the mounting plate through the first rivet point and the second rivet point on the mounting plate; and a leg unit configured to be connected to the mounting plate through the third rivet point and the fourth rivet point on the mounting plate; where the first rivet point, the second rivet point, and the third rivet point are each below the mounting plane; and a vertical distance between the center of the fourth rivet point and an extension line of the mounting plane of the mounting plate is not greater than 10 mm.
Referring to
The seat unit 1 in this embodiment includes a mounting plate 11. An upper plane of the mounting plate 11 is configured for mounting a soft part for sitting. The suspension mechanism is mounted on the mounting plate 11.
The link structure 4 in this embodiment is connected to the mounting plate 11. As shown in
As shown in
The control structure 5 in this embodiment is connected to the link structure 4. As shown in
As shown in
As shown in
In this embodiment, an end of the first leg adjustment rod 21 is hinged to a first end of the fourth leg adjustment rod 24, and an intermediate position of the first leg adjustment rod 21 is hinged to the second leg adjustment rod 22.
The third leg adjustment rod 23 is substantially triangular, and the third leg adjustment rod 23 has a first hinge point 231, a second hinge point 232, and a third hinge point 233 at its three corners, where a mounting plane for mounting a soft leg support part is provided along a line between the first hinge point 231 and the third hinge point 233, an end of the second leg adjustment rod 22 is hinged to the first hinge point 231 of the third leg adjustment rod 23, an intermediate position of the fourth leg adjustment rod 24 is hinged to the second hinge point 232 of the third leg adjustment rod 23, and a second end of the fourth leg adjustment rod 24 facing away from the first leg adjustment rod 21 is hinged to the sixth leg adjustment rod 26; a first end of the fifth leg adjustment rod 25 is hinged to the third hinge point 233 of the third leg adjustment rod 23, and a second end of the fifth leg adjustment rod 25 is hinged to the seventh leg adjustment rod 27; the seventh leg adjustment rod 27 is hinged to the mounting plate 11; and the sixth leg adjustment rod 26 is hinged to the mounting plate 11, and an intermediate position of the sixth leg adjustment rod 26 is hinged to an intermediate position of the fifth leg adjustment rod 25.
The leg unit 2 in this embodiment further includes a linkage adjustment rod 28. In an embodiment, as shown in
The drive unit 6 in this embodiment is connected to the control structure 5 and the leg unit 2 separately. In an embodiment, as shown in
As shown in
The mechanical extension device in this embodiment has multiple states to provide different use postures. Specifically, the mechanical extension device has a state for a sitting posture, a state for a leisure posture, and a state for a lying posture.
As shown in
As shown in
As shown in
A control principle of the mechanical extension device in this embodiment is described below. In the state for the sitting posture, the drive unit 6 is in an initial state (the distance between the first bracket 61 and the second bracket 62 is the closest). When the telescopic unit 63 pushes the second bracket 62 and pushes the sixth leg adjustment rod 26 through the second bracket 62, the sixth leg adjustment rod 26 rotates about a hinge point between the sixth leg adjustment rod 26 and the mounting plate 11 to unfold the leg unit 2. When the telescopic unit 63 continues to extend, the first bracket 61 pushes the first control link 51, and the first control link 51 may adjust the angle of the backrest unit 3 (the angle between the mounting portion 321 of the first backrest adjustment rod 32 and the mounting plate 11 of the seat unit 1 increases).
Compared with that in the related art, the mechanical extension device provided in this embodiment has the following advantages or effects: a simple structure and a reasonable design; a seat frame can be adjusted between multiple states simply by one power unit, relatively reducing a cost; the link structure 4 and the control structure 5 are more compact in structure and more reasonable in design and thus are adjusted and operated more smoothly, improving use comfort; and the backrest unit has enhanced structural strength and is not easy to damage during use.
Referring to
The seat unit 1 in this embodiment includes a mounting plate 11. As shown in
As shown in
In some embodiments, when the mechanical extension device is in use, a vertical distance between each of the first rivet point 1111, the second rivet point 1112, the third rivet point 1113, and the fourth rivet point 1114 and the mounting plane 111 of the mounting plate 11 (or an extension line of the mounting plane 111) is not greater than 20 mm. In some embodiments, when the mechanical extension device is in use, the vertical distance between the fourth rivet point 1114 and the extension line of the mounting plane 111 of the mounting plate 11 is not greater than 10 mm. In some embodiments, when the mechanical extension device is in use, the center of the fourth rivet point 1114 is above the mounting plane 111, and a vertical distance between the center of the fourth rivet point 1114 and the extension line of the mounting plane 111 of the mounting plate 11 is not greater than 1 mm.
In some embodiments, when the mechanical extension device is in use, the fourth rivet point 1114 is within 10 mm above the mounting plane 111 or within 10 mm above the extension line in a length direction. In some embodiments, when the mechanical extension device is in use, the fourth rivet point 1114 is within 1 mm above the mounting plane 111 or within 1 mm above the extension line in the length direction. In some other embodiments, when the mechanical extension device is in use, the fourth rivet point 1114 is not lower than the mounting plane 111 in an extension direction of the length direction of the mounting plane 111, that is, a projection of the fourth rivet point 1114 along the length direction of the mounting plane 111 overlaps or is no more than 1 mm higher than a projection of the mounting plane 111 along the length direction of the mounting plane 111. The distance in this embodiment refers to a vertical distance from the central point or the center of a rivet point to the mounting plane 111 or the extension line of the mounting plane 111.
As shown in
The link structure 4 in this embodiment is connected to the mounting plate 11. As shown in
In this embodiment, the first link 41, the second link 42, the third link 43, and the mechanical extension device (the mounting plate 11) connected thereto form a first four-bar structure.
The backrest unit 3 in this embodiment is disposed on the mounting plate 11. The backrest unit 3 includes a fixed plate 31, a first backrest adjustment rod 32, a second backrest adjustment rod 33, a third backrest adjustment rod 34, and a fourth backrest adjustment rod 35, where the fixed plate 31 is fixed to the mounting plate 11, the first backrest adjustment rod 32 has a mounting portion 321 for mounting a backrest, an end of the first backrest adjustment rod 32 is hinged to the fixed plate 31, and when the first backrest adjustment rod 32 rotates about a hinge point between the first backrest adjustment rod 32 and the fixed plate 31, an angle of the mounting portion 321 may be adjusted; the third backrest adjustment rod 34 is hinged to the fixed plate 31 and has a first arm 341 and a second arm 342; a first end of the second backrest adjustment rod 33 is hinged to the first backrest adjustment rod 32, and a second end of the second backrest adjustment rod 33 is hinged to the first arm 341 of the third backrest adjustment rod 34; the second arm 342 of the third backrest adjustment rod 34 is hinged to the fourth backrest adjustment rod 35; and the fourth backrest adjustment rod 35 is connected to the control structure 5, so as to achieve linkage between the control structure 5 and the backrest unit 3.
The fixed plate 31 in this embodiment is U-shaped. In an embodiment, the fixed plate 31 includes a body portion 311, a first support arm 312, and a second support arm 313, the first backrest adjustment rod 32 is hinged to the first support arm 312, and the third backrest adjustment rod 34 is hinged to the second support arm 313. A stiffener 314 is disposed on the fixed plate 31, and the stiffener 314 is disposed on the body portion 311 and extends to at least the first support arm 312. In an embodiment, the stiffener 314 extends to the second support arm 313. During use, the first support arm 312 bears the weight of a reclining user. Thus, the arrangement of the stiffener 314 can increase the weight that the backrest unit 3 can bear, thereby improving structural strength.
As shown in
As shown in
The control structure 5 in this embodiment is connected to the link structure 4, so as to achieve linkage. In an embodiment, a first end of the fifth control link 55 is hinged to the fourth control link 54 (hinged to an intermediate position of the fourth control link 54), and a second end of the fifth control link 55 is hinged to the third link 43; a first end of the sixth control link 56 is hinged to the second control link 52 (hinged to an intermediate position of the second control link 52), and a second end of the sixth control link 56 is hinged to the third link 43; and a first end of the seventh control link 57 is hinged to the second control link 52, and a second end of the seventh control link 57 is hinged to the third link 43. In this manner, linkage between the control structure 5 and the link structure 4 is achieved.
The leg unit 2 in this embodiment is connected to the mounting plate 11. The leg unit 2 includes a first leg adjustment rod 21, a second leg adjustment rod 22, a third leg adjustment rod 23, a fourth leg adjustment rod 24, a fifth leg adjustment rod 25, a sixth leg adjustment rod 26, and a seventh leg adjustment rod 27. In this embodiment, an end of the first leg adjustment rod 21 is hinged to the fourth leg adjustment rod 24, and an intermediate position of the first leg adjustment rod 21 is hinged to the second leg adjustment rod 22; the third leg adjustment rod 23 has a first hinge point 231, a second hinge point 232, and a third hinge point 233, where the first hinge point 231, the second hinge point 232, and the third hinge point 233 are not arranged on the same straight line; an end of the second leg adjustment rod 22 is hinged to the first hinge point 231 of the third leg adjustment rod 23, an intermediate position of the fourth leg adjustment rod 24 is hinged to the second hinge point 232 of the third leg adjustment rod 23, and a second end of the fourth leg adjustment rod 24 facing away from the first leg adjustment rod 21 is hinged to the sixth leg adjustment rod 26; a first end of the fifth leg adjustment rod 25 is hinged to the third hinge point 233 of the third leg adjustment rod 23, and a second end of the fifth leg adjustment rod 25 is hinged to the seventh leg adjustment rod 27; and the seventh leg adjustment rod 27 is hinged to the mounting plate 11. In an embodiment, an end of the seventh leg adjustment rod 27 is hinged to the third rivet point 1113 of the mounting plate 11. In an embodiment, an end of the seventh leg adjustment rod 27 is directly hinged to the third rivet point 1113 of the mounting plate 11 through a rivet, and the vertical distance between the third rivet point 1113 and the mounting plane 111 is less than 20 mm, 15 mm, or 13 mm. The sixth leg adjustment rod 26 is hinged to the mounting plate 11. In an embodiment, an end of the sixth leg adjustment rod 26 is hinged to the fourth rivet point 1114 of the mounting plate 11. In an embodiment, an end of the sixth leg adjustment rod 26 is directly hinged to the fourth rivet point 1114 of the mounting plate 11 through a rivet, and the vertical distance between the fourth rivet point 1114 and the mounting plane 111 or the extension line of the mounting plane 111 is less than 10 mm.
In an embodiment, the vertical distance between the fourth rivet point 1114 and the mounting plane 111 or the extension line of the mounting plane 111 is less than 1 mm. An intermediate position of the sixth leg adjustment rod 26 is hinged to an intermediate position of the fifth leg adjustment rod 25.
In this embodiment, a first end of the linkage adjustment rod 28 is hinged to the third link 43, and a second end of the linkage adjustment rod 28 is hinged to the seventh leg adjustment rod 27. When the linkage adjustment rod 28 rotates, the linkage between the leg unit 2 and the link structure 4 can be controlled.
The drive unit 6 in this embodiment is connected to the control structure 5 and the leg unit 2 separately. In an embodiment, the drive unit 6 includes a first bracket 61, a second bracket 62, and a telescopic unit 63, where two ends of the telescopic unit 63 are connected to the first bracket 61 and the second bracket 62 separately to adjust the distance between the first bracket 61 and the second bracket 62. The drive unit 6 is connected to the control structure 5. In an embodiment, the first bracket 61 is connected to the first control link 51. The drive unit 6 is connected to the leg unit 2. Specifically, the second bracket 62 is connected to the seventh leg adjustment rod 27. The telescopic unit 63 in this embodiment may be an electric adjustment structure with a cylinder structure, a motor structure, or the like as a body so that the telescopic unit 63 can extend and retract.
The mechanical extension device in this embodiment has multiple states in use to provide different use postures. Specifically, the mechanical extension device has the state for the sitting posture, a state for a leisure posture, and a state for a lying posture.
As shown in
As shown in
As shown in
A control principle of the mechanical extension device in this embodiment is described below. In the state for the sitting posture, the drive unit 6 is in an initial state (the distance between the first bracket 61 and the second bracket 62 is the closest). When the telescopic unit 63 pushes the second bracket 62 and pushes the seventh leg adjustment rod 27 through the second bracket 62, the seventh leg adjustment rod 27 rotates about a hinge point between the seventh leg adjustment rod 27 and the mounting plate 11 to unfold the leg unit 2. When the telescopic unit 63 continues to extend, the first bracket 61 pushes the first control link 51, and the first control link 51 may adjust the angle of the backrest unit 3.
In the present application, the link structure 4 and the control structure 5 are compact in structure and reasonable in design and thus are adjusted and operated more smoothly, improving use comfort; the backrest unit 3 has enhanced structural strength and is not easy to damage during use; and the vertical distance between the fourth rivet point 1114 and the extension line of the mounting plane 111 is not greater than 10 mm. In an embodiment, the vertical distance between the fourth rivet point 1114 and the extension line of the mounting plane 111 is not greater than 1 mm, thereby reducing the height of the mounting plane and reducing the thickness of the mechanical extension device.
Compared with that in the related art, the mechanical extension device provided in the present application has the following advantages or effects: a simple structure and a reasonable design; a seat frame can be adjusted between multiple states simply by one power unit, relatively reducing a cost; the link structure 4 and the control structure 5 are more compact in structure and more reasonable in design so that the mechanical extension device is adjusted and operated more smoothly, improving the use comfort; the backrest unit 3 has the enhanced structural strength and is not easy to damage during use; the arrangement of the first rivet point 1111, the second rivet point 1112, the third rivet point 1113, and the fourth rivet point 1114 in position can reduce the overall height of the sofa and satisfy the requirement for reducing a sitting height of the sofa. Further, the overall thickness of the mechanical extension device can be reduced, that is, with the sitting height unchanged, space at the bottom of the sofa can be increased so that the mechanical extension device can be further applied to a high sofa or a storage function sofa. The wooden frame can be directly mounted on the mounting plane, and no interstice exists between the wooden frame and a side edge of the mounting plate, achieving better stability and more convenience of installation.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202110940890.4 | Aug 2021 | CN | national |
| 202110940906.1 | Aug 2021 | CN | national |
| 202121921433.2 | Aug 2021 | CN | national |
| 202121921465.2 | Aug 2021 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2022/112900 | 8/17/2022 | WO |
