Mechanical stretching unit and mechanical stretching device
阅读说明:本技术 一种机械伸展单元及机械伸展装置 (Mechanical stretching unit and mechanical stretching device ) 是由 陈永春 施振杰 李文才 李立波 于 2020-06-11 设计创作,主要内容包括:本发明公开了一种机械伸展单元及机械伸展装置,机械伸展单元包括脚凳组件、坐垫支撑组件和靠背组件,所述坐垫支撑组件包括座部安装板,通过设置有后支撑连杆、第一凳塌连杆、第二凳塌连杆、第一横向连杆、第一纵向连杆和座部安装板构成第一连杆机构用以带动所述脚凳组件相对于座部安装板在收拢位置和伸展位置之间移动;所述靠背组件包括背靠件、第二横向连杆,所述第二横向连杆平行设于所述第一横向连杆的一侧,通过设置有前纵向连杆、底部连杆、后纵向连杆和第二横向连杆构成第二连杆机构用以带动所述靠背组件在依靠位置和后仰位置之间移动。通过两组连杆机构分别驱动脚凳组件和靠背组件,其运动平稳,伸展过程连贯。(The invention discloses a mechanical stretching unit and a mechanical stretching device, wherein the mechanical stretching unit comprises a footrest component, a cushion supporting component and a backrest component, the cushion supporting component comprises a seat mounting plate, and a first link mechanism is formed by arranging a rear supporting link, a first stool collapsing link, a second stool collapsing link, a first transverse link, a first longitudinal link and the seat mounting plate and used for driving the footrest component to move between a folding position and a stretching position relative to the seat mounting plate; the backrest component comprises a backrest piece and a second transverse connecting rod, the second transverse connecting rod is arranged on one side of the first transverse connecting rod in parallel, and a second connecting rod mechanism is formed by the front longitudinal connecting rod, the bottom connecting rod, the rear longitudinal connecting rod and the second transverse connecting rod and is used for driving the backrest component to move between a depending position and a backward leaning position. The footrest component and the backrest component are respectively driven by the two groups of link mechanisms, the movement is stable, and the extension process is continuous.)
1. A mechanical stretching unit, comprising: the seat cushion supporting assembly comprises a seat mounting plate, a first transverse connecting rod parallel to the seat mounting plate is arranged on one side of the seat mounting plate and rotatably connected to a first stool collapsing connecting rod in the foot stool assembly, the tail end of the first stool collapsing connecting rod and the tail end of a second stool collapsing connecting rod in the foot stool assembly are hinged to the seat mounting plate, the tail end of the first transverse connecting rod is hinged to a rear longitudinal connecting rod, the rear longitudinal connecting rod is hinged to the seat mounting plate through a rear supporting connecting rod, and the seat mounting plate, the first stool collapsing connecting rod, the second stool collapsing connecting rod, the first transverse connecting rod, the rear longitudinal connecting rod and the rear supporting connecting rod form a first connecting rod mechanism for driving the foot stool assembly to move between a folding position and an extending position relative to the seat mounting plate; the backrest component comprises a backrest piece and a second transverse connecting rod, the second transverse connecting rod is arranged on one side of the first transverse connecting rod in parallel, the backrest piece is pivotally connected to the seat mounting plate, the tail end of the second transverse connecting rod is rotatably connected with the backrest piece, the front end of the second transverse connecting rod is hinged to a front longitudinal connecting rod, the middle of the front longitudinal connecting rod is hinged to a bottom connecting rod, the bottom connecting rod is hinged to a rear longitudinal connecting rod, the rear longitudinal connecting rod is connected with the second transverse connecting rod, and the second transverse connecting rod, the front longitudinal connecting rod, the bottom connecting rod and the rear longitudinal connecting rod form a second connecting rod mechanism for driving the backrest component to move between a folding position and a reclining position; and the tail end of the front longitudinal connecting rod is provided with a front supporting piece, and the front supporting piece is connected with the seat mounting plate and used for driving the seat mounting plate to ascend or descend when the front longitudinal connecting rod rotates.
2. The mechanical extension unit of claim 1, wherein the front longitudinal link includes a first link plate and a second link plate arranged to intersect to form a V-shaped configuration, the bottom link and the front longitudinal link are hinged at the intersection of the first link plate and the second link plate, the first link plate is hinged to the second transverse link, and the second link plate is hinged to the front support.
3. The mechanical spreader unit of claim 2, wherein the front longitudinal link has a slot at the intersection of the first connecting plate and the second connecting plate, the front support has a stop member, and the stop member abuts against the inner wall of the slot when the backrest is in the retracted position.
4. The mechanical extension unit of claim 1, wherein the first linkage is coupled to the second linkage; the backrest part drives the second connecting rod mechanism to contract when moving to the backward leaning position; when the second connecting rod mechanism is contracted, the second transverse connecting rod approaches to the bottom connecting rod; and the second link mechanism presses the first link mechanism to contract when doing contraction action.
5. The mechanical extension unit of claim 4, wherein the backrest assembly further comprises a third transverse connecting rod and a crank connecting member, two ends of the third transverse connecting rod are respectively hinged to the backrest member and the second transverse connecting rod, a head end of the crank connecting member is hinged to the third transverse connecting rod, a tail end of the crank connecting member is rotatably connected to the bottom connecting rod, a first protrusion is disposed on the crank connecting member and abuts against a side wall of the rear longitudinal connecting rod, and when the second connecting rod mechanism performs a retracting action, the first protrusion presses the side wall of the rear longitudinal connecting rod.
6. The mechanical extension unit of claim 5, wherein the crank connector includes a third connecting plate and a fourth connecting plate, the third connecting plate and the fourth connecting plate are arranged to intersect to form a V-shaped structure, the third connecting plate is hinged to the third transverse link, the fourth connecting plate is hinged to the rear support link, and the rear longitudinal link is hinged to the crank connector at the intersection of the third connecting plate and the fourth connecting plate.
7. A mechanical extension unit according to claim 5, wherein the third transverse link is provided with a second projection which abuts against a side wall of the rear support link when the backrest is in the reclined position.
8. A mechanical stretching apparatus, comprising a base and two mechanical stretching units as claimed in any one of claims 1 to 6, wherein the two mechanical stretching units are arranged on the base in mirror symmetry, and the bottom connecting rod is fixedly connected with the base.
9. The mechanical stretching device of claim 8, wherein a plurality of support tubes are disposed between the two mechanical stretching units; two ends of at least one of the support tubes are respectively connected with the front longitudinal connecting rods in the two mechanical extension units.
10. The mechanical stretching apparatus of claim 8, wherein a support assembly for supporting the mechanical stretching unit is provided on the base; the supporting component comprises a supporting plate, the supporting plate is connected with the base, a connecting rod set is hinged to the supporting plate and comprises a plurality of supporting connecting rods, the heads and the tails of two adjacent supporting connecting rods are hinged to each other, the supporting connecting rods located at the head ends are hinged to the supporting plate, and the supporting connecting rods located at the tail ends are fixedly connected with the bottom connecting rod.
11. The mechanical stretching device as claimed in claim 10, wherein a bending link is rotatably connected to the supporting link at the rear end, the bending link is divided into a first extending section and a second extending section along its length direction, the second extending section is hinged to the supporting link, the first extending section is bent along its length direction away from the bottom link, and the first extending section is hinged to the rear longitudinal link.
12. The mechanical stretching apparatus of claim 11 wherein said second extension is curved along its length in a direction away from said mechanical stretching unit.
Technical Field
The present invention relates to the field of sports upholstered furniture for supporting the body of a user in a substantially seated position, and more particularly to a mechanical stretching unit and a mechanical stretching device.
Background
Reclining seating units currently exist on the market that allow a user to extend a footrest or ottoman forward relative to a seat and recline a backrest rearward. These existing seating units generally provide three basic positions: a standard non-reclined stowed position; an extended position; and a reclined position. In the stowed position, the base is in a generally horizontal orientation and the backrest is disposed substantially upright. Additionally, if the seating unit includes an ottoman to which the mechanism is attached, the mechanism folds so that the ottoman does not extend. In the extended position, commonly referred to as the television ("TV") position, the ottoman is extended forward of the seat portion while the backrest and seat cushion are rotated backward through an angle of about 4 degrees to ensure that the occupant of the seating unit is comfortably watching television; in the reclined position, the backrest is positioned rearwardly from the extended position at an obtuse angle to the seat for resting or sleeping.
Many modern seating units in the current industry, such as recliners or sofas, are adapted for the above-mentioned adjustment function; it is currently common to use a wrench to control the opening of the seating unit; however, in order to expand the application range of the seat unit and improve the comfort level of the seat unit, many seat units are provided with power adjustment by combining a motor, and the backrest, the seat cushion and the leg rest are driven by the motor to drive the backrest, the seat cushion and the leg rest to open or close so as to meet the application requirements.
While many conventional reclining chairs operate satisfactorily, furniture manufacturers are continually seeking to develop improved chair frames and functional racks to reduce the complexity of the system. The' 201110021296.1 patent teaches a linkage mechanism and a seating unit that allows the seating unit to recline or fold by means of a channel and a sequential element that extends into the channel, which allows the state of the seating unit to change by sliding the sequential element within the channel. However, the following problems still remain as described above;
the seat unit can be forcibly extended, lifted and closed only by the sliding long groove; thereby make the extension device in the function, can not make the movement track of product accomplish smoothly, because of the space clearance of spout, lead to the user when leaning on the back, the state of beating or displacement can appear, and to a great extent has reduced user's experience and has felt.
And in the process of folding or extending the backrest, the plate where the sliding groove is located relatively moves upwards or downwards to drive the component for supporting the cushion to rotate, and because the matching motion track of the sliding groove and the component is not smooth enough, the problem of jumping or displacement can also occur in the rotating process of the component for supporting the cushion.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a mechanical stretching unit which respectively drives a footrest component and a backrest component through two groups of link mechanisms, has stable motion, no sense of micro-pulsation in the stretching process, excellent experience and better satisfaction of people on the requirement of comfort in use.
The technical scheme adopted by the invention is as follows:
a mechanical stretching unit comprising: the seat cushion supporting assembly comprises a seat mounting plate, a first transverse connecting rod parallel to the seat mounting plate is arranged on one side of the seat mounting plate and rotatably connected to a first stool collapsing connecting rod in the foot stool assembly, the tail end of the first stool collapsing connecting rod and the tail end of a second stool collapsing connecting rod in the foot stool assembly are hinged to the seat mounting plate, the tail end of the first transverse connecting rod is hinged to a rear longitudinal connecting rod, the rear longitudinal connecting rod is hinged to the seat mounting plate through a rear supporting connecting rod, and the seat mounting plate, the first stool collapsing connecting rod, the second stool collapsing connecting rod, the first transverse connecting rod, the rear longitudinal connecting rod and the rear supporting connecting rod form a first connecting rod mechanism for driving the foot stool assembly to move between a folding position and an extending position relative to the seat mounting plate; the backrest component comprises a backrest piece and a second transverse connecting rod, the second transverse connecting rod is arranged on one side of the first transverse connecting rod in parallel, the backrest piece is pivotally connected to the seat mounting plate, the tail end of the second transverse connecting rod is rotatably connected with the backrest piece, the front end of the second transverse connecting rod is hinged to a front longitudinal connecting rod, the middle of the front longitudinal connecting rod is hinged to a bottom connecting rod, the bottom connecting rod is hinged to a second rear longitudinal connecting rod, the second rear longitudinal connecting rod is connected with the second transverse connecting rod, and the second transverse connecting rod, the front longitudinal connecting rod, the bottom connecting rod and the second rear longitudinal connecting rod form a second connecting rod mechanism for driving the backrest component to move between a folding position and a reclining position; and the tail end of the front longitudinal connecting rod is provided with a front supporting piece, and the front supporting piece is connected with the seat mounting plate and used for driving the seat mounting plate to ascend or descend when the front longitudinal connecting rod rotates.
In a further scheme, the front longitudinal connecting rod comprises a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are arranged in a crossed mode to form a V-shaped structure, the bottom connecting rod and the front longitudinal connecting rod are hinged to the meeting position of the first connecting plate and the second connecting plate, the first connecting plate is hinged to the second transverse connecting rod, and the second connecting plate is hinged to the front supporting piece.
In a further scheme, a clamping groove is formed in the intersection of the first connecting plate and the second connecting plate of the front longitudinal connecting rod, a limiting part is arranged on the front supporting part, and when the backrest is located at the folding position, the limiting part abuts against the inner wall of the clamping groove to prevent the backrest from excessively rotating to exceed the preset position where the folding position is located.
In a further aspect, the first linkage is connected to the second linkage; the backrest part drives the second connecting rod mechanism to contract when moving to the backward leaning position; when the second connecting rod mechanism is contracted, the second transverse connecting rod approaches to the bottom connecting rod; and the second link mechanism presses the first link mechanism to contract when doing contraction action.
In a further scheme, the backrest assembly further comprises a third transverse connecting rod and a crank connecting piece, two ends of the third transverse connecting rod are hinged to the backrest piece and the second transverse connecting rod respectively, the head end of the crank connecting piece is hinged to the third transverse connecting rod, the tail end of the crank connecting piece is rotatably connected with the bottom connecting rod, a first bulge is arranged on the crank connecting piece and abuts against the side wall of the rear longitudinal connecting rod, and when the second connecting rod mechanism contracts, the first bulge presses the side wall of the rear longitudinal connecting rod.
In a further scheme, the crank connecting piece comprises a third connecting plate and a fourth connecting plate, the third connecting plate and the fourth connecting plate are arranged in a crossed mode to form a V-shaped structure, the third connecting plate is hinged to the third transverse connecting rod, the fourth connecting plate is hinged to the rear supporting connecting rod, and the rear longitudinal connecting rod is hinged to the crank connecting piece at the intersection of the third connecting plate and the fourth connecting plate.
In a further scheme, a second protrusion is arranged on the third transverse connecting rod, and when the backrest is located at the backward leaning position, the second protrusion abuts against the side wall of the rear supporting connecting rod. Through the second bulge and the rear part
The side walls of the supporting connecting rods are abutted to form a limit position, so that the backrest part is prevented from continuously inclining backwards and falling.
The invention also provides a mechanical stretching device which comprises a base and two mechanical stretching units in the scheme, wherein the two mechanical stretching units are arranged on the base in a mirror symmetry mode, and the bottom connecting rod is fixedly connected with the base.
In a further aspect, a plurality of support tubes are disposed between the two mechanical extension units. The overall stability of the device is improved by a plurality of support tubes.
In a further scheme, two ends of at least one support tube in the plurality of support tubes are respectively connected with the front longitudinal connecting rods in the two mechanical extension units, so that the second connecting rod mechanisms on two sides can be ensured to synchronously operate, and the bottom mounting plate can be lifted more stably.
In a further scheme, a supporting component for supporting the mechanical extension unit is arranged on the base, so that the mechanical extension unit is supported, and the stability of the structure is improved.
In a further scheme, the supporting component includes the backup pad, the backup pad with the base is connected, just it has the linkage to articulate in the backup pad, the linkage includes many supporting connecting rods, and the end to end of two adjacent supporting connecting rods is articulated each other, the supporting connecting rod that is located the head end with the backup pad is articulated, and the supporting connecting rod that is located the tail end is connected with bottom connecting rod fixed connection. So that the supporting component can rotate along with the change of the shape of the mechanical stretching unit to continuously support.
In a further scheme, a bent connecting rod is rotatably connected to the supporting connecting rod at the tail end, the bent connecting rod is divided into a first extending section and a second extending section along the length direction of the bent connecting rod, the second extending section is hinged to the supporting connecting rod, the first extending section is bent along the length direction of the first extending section to the direction far away from the bottom connecting rod, and the first extending section is hinged to the rear longitudinal connecting rod to avoid interference with the bottom connecting rod.
In a further aspect, the second extension is bent along its length in a direction away from the mechanical extension unit to avoid interference with the crank connection.
Advantageous effects
1. The footstool component is driven by the connecting rod component formed by the connecting rods, the motion is stable, the stretching process is coherent without micro-bounce perception, the footstool component has excellent experience feeling, and the requirement of people for comfort of materials is met.
2. The seat mounting plate is driven to ascend or descend by the second connecting rod, the transmission mode that the seat frame is jacked up by the sliding groove commonly used in the market is overcome, the seat frame is stable in movement, the stretching process is coherent without micro-jumping perception, the seat frame has excellent experience feeling, and the requirement of people for comfort of materials is met more.
3. The footrest assembly is driven to move between a folded position and an extended position relative to the seat mounting plate through a first transverse connecting rod; the second linkage drives the backrest assembly to move between a stowed position and a reclined position. The footrest assembly and the backrest assembly are driven by the two link mechanisms respectively, and the structure operation is more stable.
4. The first transverse connecting rod is located on one side of the seat mounting plate, and the second transverse connecting rod is located on one side of the first transverse connecting rod, so that the heights of the seat mounting plate, the first transverse connecting rod and the second transverse connecting rod are approximately consistent, the longitudinal height of the mechanical stretching unit is greatly reduced, and subsequent assembly is facilitated.
Drawings
FIG. 1 is a schematic view of a mechanical stretching apparatus;
FIG. 2 is a schematic view of the mechanical extension unit with the footrest assembly in a stowed position and the backrest assembly in a stowed position;
FIG. 3 is a schematic view of the mechanical extension unit with the footrest assembly in an extended position and the backrest assembly in a reclined position;
FIG. 4 is a schematic illustration of the footrest assembly and the first link mechanism with the footrest assembly in the collapsed position;
FIG. 5 is a schematic illustration of the footrest assembly and the first linkage mechanism with the footrest assembly in the extended position;
fig. 6 is a schematic structural view of the backrest assembly and the second link mechanism when the backrest assembly is in the folded position;
FIG. 7 is a schematic view of the backrest assembly and the second linkage mechanism with the backrest assembly in a reclined position;
FIG. 8 is a schematic view of the front longitudinal link;
FIG. 9 is a schematic structural view of a crank attachment;
FIG. 10 is a schematic view of a curved link;
FIG. 11 is a schematic view of the backrest;
FIG. 12 is a schematic three-dimensional view of the mechanical extension unit when the footrest assembly is in the stowed position and the backrest assembly is in the stowed position;
FIG. 13 is a schematic view of the mechanical extension unit at another angle with the footrest assembly in the stowed position and the backrest assembly in the stowed position;
FIG. 14 is a schematic three-dimensional view of the mechanical extension unit when the footrest assembly is in the extended position and the backrest assembly is in the stowed position;
fig. 15 is a three-dimensional schematic view of the mechanical extension unit when the footrest assembly is in the extended position and the backrest assembly is in the reclined position.
The reference numerals in the schematic drawings illustrate:
1-base, 2-mechanical extension unit, 3-footrest assembly, 31-footrest, 32-first bench-collapsing link, 33-second bench-collapsing link, 34-third bench-collapsing link, 35-fourth bench-collapsing link, 4-cushion-supporting assembly, 41-seat-mounting plate, 5-backrest assembly, 51-backrest, 511-backrest-insertion section, 512-connection section, 52-second transverse link, 53-third transverse link, 531-second projection, 54-crank-connection, 541-third connection plate, 542-fourth connection plate, 543-first projection, 6-first transverse link, 7-rear longitudinal link, 71-limiting groove, 8-rear supporting link, 9-front longitudinal link, 91-first connection plate, 92-second connecting plate, 93-clamping groove, 10-front support, 101-stop, 11-bottom link, 12-support component, 121-support plate, 122-support link, 123-bending link, 1231-first extension, 1232-second extension, 13-drive component, 131-first drive link, 1311-groove, 132-second drive link, 1321-third protrusion, 133-rotation shaft, 134-spring, 14-support tube.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Referring to fig. 1-15, the present embodiment provides a mechanical stretching apparatus, which includes a base 1 and two
The
And the tail end (i.e. the end far away from the footrest 31) of the first transverse connecting
The first
When the first link mechanism operates and the first
On the contrary, when the first link mechanism operates to drive the first
Meanwhile, in the present embodiment, the
The second
The third transverse connecting
When the second linkage is operated (i.e., the
Referring to fig. 8, the front
Meanwhile, the front longitudinal connecting
Conversely, when the second linkage operates such that the longitudinal distance between the second
The
And the third
In addition, the
In order to avoid the dislocation of the first protrusion 543 and the rear longitudinal connecting
In this embodiment, the
In addition, a plurality of supporting
In the present embodiment, the base 1 is provided with a supporting
In the scheme, the hinging mode between the connecting rods adopts a bearing type kinematic pair of a column shaft and a bush. However, other prior art hinges may be used to ensure smooth operation of the extension device.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
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