CN111685520B - Mechanical stretching unit and mechanical stretching device - Google Patents
Mechanical stretching unit and mechanical stretching device Download PDFInfo
- Publication number
- CN111685520B CN111685520B CN202010531243.3A CN202010531243A CN111685520B CN 111685520 B CN111685520 B CN 111685520B CN 202010531243 A CN202010531243 A CN 202010531243A CN 111685520 B CN111685520 B CN 111685520B
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- stool
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- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 238000005452 bending Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 5
- 238000013459 approach Methods 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 11
- 230000033001 locomotion Effects 0.000 abstract description 7
- 230000001427 coherent effect Effects 0.000 abstract description 4
- 230000009191 jumping Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000008447 perception Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000004660 morphological change Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 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
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/034—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest
- A47C1/035—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest
- A47C1/0355—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest actuated by linkages, e.g. lazy-tongs mechanisms
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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
- A47C20/00—Head-, foot- or like rests for beds, sofas or the like
- A47C20/08—Head-, foot- or like rests for beds, sofas or the like with means for adjusting two or more rests simultaneously
- A47C20/10—Head-, foot- or like rests for beds, sofas or the like with means for adjusting two or more rests simultaneously using rods
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Nursing (AREA)
- Dentistry (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
The invention discloses a mechanical stretching unit and a mechanical stretching device, wherein the mechanical stretching unit comprises a footstool assembly, a cushion support assembly and a backrest assembly, the cushion support assembly comprises a seat mounting plate, and a first link mechanism is formed by a rear support link, a first stool collapse link, a second stool collapse link, a first transverse link, a first longitudinal link and the seat mounting plate and is used for driving the footstool assembly to move between a furling position and a stretching position relative to the seat mounting plate; the backrest component comprises a backrest piece and a second transverse connecting rod, wherein 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 a front longitudinal connecting rod, a bottom connecting rod, a rear longitudinal connecting rod and the second transverse connecting rod and is used for driving the backrest component to move between a leaning position and a leaning position. The two groups of link mechanisms are used for respectively driving the footstool component and the backrest component, so that the movement is stable, and the stretching process is coherent.
Description
Technical Field
The present invention relates to the field of sports upholstered furniture for supporting a user's body in a substantially sitting position, and more particularly to a mechanical stretching unit and a mechanical stretching device.
Background
Reclining seating units are currently available on the market that allow a user to extend a footrest or ottoman forward and recline the back rearward relative to the seat. These existing seating units typically provide three basic positions: a standard non-reclined stowed position; an extended position; a reclined position. In the stowed position, the base is in a generally horizontal orientation and the backrest is disposed substantially upright. In addition, if the seating unit includes a ottoman to which the mechanism is attached, the mechanism is folded such that the ottoman does not extend. In an extended position, commonly referred to as a television ("TV") position, the ottoman extends forward of the seat while the back rest and seat cushion are rotated rearward through an angle of about 4 degrees to ensure that the occupant of the seating unit is comfortable watching television; in the reclined position, the backrest is positioned rearwardly from the extended position in obtuse relationship with the seat for rest or sleep.
Many modern seating units in the industry, such as lounge chairs or sofas, are currently adapted for the adjustment function described above; 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 use comfort of the seat unit, at present, many seat units are also combined with a motor to provide power adjustment, so that the backrest, the cushion and the leg rest are driven by the motor to drive the backrest, the cushion and the leg rest to open or close so as to meet the use requirement.
While many conventional reclining chairs operate satisfactorily, furniture manufacturers continue to seek to develop improved chair frames and functional racks in order to reduce the complexity of the system. The patent application number 201110021296.1 proposes a linkage mechanism and a seat unit for realizing the reclining or folding of the seat unit by a guide groove and a sequential element extending into the guide groove, and the state of the seat unit is changed by sliding the sequential element in the guide groove. However, the following problems remain;
the seat unit can be forcibly stretched, lifted and closed only by the sliding long groove; therefore, the stretching device is functionally incapable of enabling the movement track of the product to be smooth, and the user can jump or displace when leaning against the backrest due to the space clearance of the sliding groove, so that the experience of the user is reduced to a great extent.
And in the process of folding or stretching the backrest, the plate block where the sliding groove is positioned moves upwards or downwards relatively to drive the part for supporting the cushion to rotate, and the problem of jumping or displacement can also occur in the process of rotating the part for supporting the cushion because the matching movement track of the sliding groove and the element is not smooth enough.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a mechanical stretching unit which drives a footstool component and a backrest component respectively through two groups of connecting rod mechanisms, has stable motion, is coherent in stretching process and has no micro-jitter perception, has excellent experience, and meets the requirements of people on use comfort.
The technical problems are solved, and the invention adopts the following technical scheme:
A mechanical stretching unit comprising: the seat cushion support 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, the first transverse connecting rod is rotatably connected to a first stool collapse connecting rod in the foot stool assembly, the tail end of the first stool collapse connecting rod and the tail end of a second stool collapse connecting rod in the foot stool assembly are hinged with the seat mounting plate, a rear longitudinal connecting rod is hinged with the tail end of the first transverse connecting rod, the rear longitudinal connecting rod is hinged with the seat mounting plate through a rear support connecting rod, and a first connecting rod mechanism is formed by the seat mounting plate, the first stool collapse connecting rod, the second stool collapse connecting rod, the first transverse connecting rod, the rear longitudinal connecting rod and the rear support connecting rod and used for driving the foot stool assembly to move between a furling position and an extending position relative to the seat mounting plate; the backrest assembly comprises a backrest part 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 part is pivotally connected to the seat mounting plate, the tail end of the second transverse connecting rod is rotatably connected with the backrest part, the front end of the second transverse connecting rod is hinged with a front longitudinal connecting rod, the middle part of the front longitudinal connecting rod is hinged with a bottom connecting rod, the bottom connecting rod is hinged with 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 assembly 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 crossing mode to form a V-shaped structure, the bottom connecting rod is hinged to the front longitudinal connecting rod at the intersection 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, the front longitudinal connecting rod is provided with a clamping groove at the intersection of the first connecting plate and the second connecting plate, the front supporting piece is provided with a limiting piece, and when the backrest piece is positioned at the folding position, the limiting piece is propped against the inner wall of the clamping groove to prevent the backrest piece from excessively rotating beyond a preset point position where the folding position is positioned.
In a further aspect, the first linkage is coupled to the second linkage; the backrest piece drives the second link mechanism to shrink when moving to the backward position; when the second link mechanism is contracted, the second transverse link approaches the bottom link; and the second link mechanism compresses the first link mechanism to shrink when doing shrinkage action.
In a further scheme, the backrest component 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 component 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 is abutted to the side wall of the rear longitudinal connecting rod, and when the second connecting rod mechanism performs contraction action, 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 crossing mode to form a V-shaped structure, the third connecting plate is hinged with the third transverse connecting rod, the fourth connecting plate is hinged with the rear supporting connecting rod, and the rear longitudinal connecting rod is hinged with the crank connecting piece at the intersection of the third connecting plate and the fourth connecting plate.
In a further aspect, a second protrusion is disposed on the third transverse link, and when the backrest is in the reclined position, the second protrusion abuts against a side wall of the rear support link. Through the second bulge and the back support
The side walls of the supporting connecting rods are propped against to form limit, so that the backrest piece is prevented from continuously leaning backwards and falling down.
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 rods are fixedly connected with the base.
In a further aspect, a plurality of support tubes are disposed between the two mechanical expansion units. The overall stability of the device is improved by a plurality of support tubes.
In a further scheme, the 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 stretching units, so that the synchronous operation of the second connecting rod mechanisms at the two sides is ensured, and the lifting of the bottom mounting plate is more stable.
In a further scheme, be provided with the supporting component who is used for supporting mechanical stretching unit on the base, support mechanical stretching unit, improve the stability of structure.
In a further scheme, the supporting component comprises a supporting plate, the supporting plate is connected with the base, a connecting rod group is hinged to the supporting plate, the connecting rod group 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 rod at the head end is hinged to the supporting plate, and the supporting connecting rod at the tail end is fixedly connected with the bottom connecting rod. So that the support component can rotate along with the morphological change of the mechanical stretching unit to continuously support.
In a further scheme, be located the rotatable bending connecting rod that is connected with on the support connecting rod of tail end, follow self length direction on the bending connecting rod and divide into first extension section and second extension section, the second extension section is articulated with the support connecting rod, and first extension section is crooked along self length to the direction of keeping away from the bottom connecting rod, first extension section is articulated with back longitudinal connecting rod, avoids taking place to interfere with the bottom connecting rod.
In a further aspect, the second extension is curved along its length in a direction away from the mechanical stretching unit, avoiding interference with the crank connection.
Advantageous effects
1. The footstool component is driven by the connecting rod component formed by the connecting rods, so that the footstool component moves stably, the stretching process is coherent without trace jumping perception, the footstool component has excellent experience, and the requirements of people on material comfort are met.
2. The second connecting rod drives the seat mounting plate to ascend or descend, the transmission mode that the sliding groove is used commonly in the market to jack up the seat frame is overcome, the motion is stable, the stretching process is continuous, the micro-jitter sensing is avoided, the experience is excellent, and the requirements of people on material comfort are met.
3. The footrest assembly is driven to move between a folded position and an extended position relative to the seat mounting plate by a first transverse connecting rod; the second link mechanism drives the backrest assembly to move between a folded position and a reclined position. The footstool component and the backrest component are driven by two link mechanisms respectively, so that the structure operation is more stable.
4. The first transverse connecting rod is positioned on one side of the seat mounting plate, and the second transverse connecting rod is positioned 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 nearly identical, the longitudinal height of the mechanical stretching unit is greatly reduced, and the subsequent assembly is convenient.
Drawings
FIG. 1 is a schematic view of a mechanical stretcher;
FIG. 2 is a schematic view of the mechanical extension unit with the footrest assembly in the stowed position and the backrest assembly in the stowed position;
FIG. 3 is a schematic view of the mechanical extension unit with the footrest assembly in the extended position and the backrest assembly in the reclined position;
FIG. 4 is a schematic view of the footrest assembly and first link mechanism in the collapsed position;
FIG. 5 is a schematic view of the footrest assembly and first link mechanism in an extended position;
FIG. 6 is a schematic view of the backrest assembly and the second link mechanism in a retracted position;
FIG. 7 is a schematic view of the backrest assembly and the second linkage in a reclined position;
FIG. 8 is a schematic structural view of a front longitudinal link;
FIG. 9 is a schematic view of the structure of the crank attachment;
FIG. 10 is a schematic structural view of a curved link;
FIG. 11 is a schematic view of the structure of the backrest;
FIG. 12 is a schematic view of the three-dimensional structure of the mechanical extension unit with the footrest assembly in the stowed position and the backrest assembly in the stowed position;
FIG. 13 is a schematic view of the mechanical extension unit in a collapsed position of the footrest assembly and a collapsed position of the backrest assembly at another angle;
FIG. 14 is a schematic view of the three-dimensional structure of the mechanical extension unit with the footrest assembly in the extended position and the backrest assembly in the collapsed position;
figure 15 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 reclined position.
Reference numerals in the schematic drawings illustrate:
1-base, 2-mechanical extension unit, 3-foot stool assembly, 31-footrest, 32-first foot stool collapse link, 33-second foot stool collapse link, 34-third foot stool collapse link, 35-fourth foot stool collapse link, 4-seat support assembly, 41-seat mounting plate, 5-backrest assembly, 51-backrest, 511-backrest insert section, 512-connecting section, 52-second transverse link, 53-third transverse link, 531-second boss, 54-crank connector, 541-third connecting plate, 542-fourth connecting plate, 543-first boss, 6-first transverse link, 7-rear longitudinal link, 71-limit slot, 8-rear support link, 9-front longitudinal link, 91-first connecting plate, 92-second connecting plate, 93-slot, 10-front support, 101-limit, 11-bottom link, 12-support assembly, 121-support plate, 122-support link, 123-bending link, 1231-first extension section, 1232-second extension section, 13-first drive link, 131-drive link, 133-drive link, 14-drive link, 133-drive link, and 133-drive link.
Detailed Description
For a further understanding of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings and detailed description.
In the description of the present invention, it should 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 the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1-15, the present embodiment provides a mechanical stretching device, which includes a base 1 and two mechanical stretching units 2, wherein the two mechanical stretching units 2 are disposed on the base 1 in a mirror symmetry manner. In this embodiment, each mechanical extension unit 2 comprises a footrest assembly 3, a seat cushion support assembly 4 and a backrest assembly 5. The footrest assembly 3 comprises a footrest 31, a third stool collapse connecting rod 34 and a fourth stool collapse connecting rod 35 are connected to the footrest 31, the third stool collapse connecting rod 34 and the fourth stool collapse connecting rod 35 are parallel to each other, a first stool collapse connecting rod 32 is hinged to the third stool collapse connecting rod 34, a second stool collapse connecting rod 33 is hinged to the fourth stool collapse connecting rod 35, the first stool collapse connecting rod 32 is parallel to the second stool collapse connecting rod 33, and the second stool collapse connecting rod 33 and the third stool collapse connecting rod 34 are mutually intersected and hinged to each other at the intersection.
The seat cushion support assembly 4 includes a seat mounting plate 41, one side of the seat mounting plate 41 being provided with a first transverse link 6 parallel to the seat mounting plate 41. The head end of the first transverse link 6 is rotatably coupled to the first collapse link 32, and the tail end of the first collapse link 32 (i.e., the end remote from the footrest 31) and the tail end of the second collapse link 33 are each hinged to the seat mounting plate 41.
And the rear end of the first transverse link 6 (i.e. the end remote from the footrest 31) is hinged with a rear longitudinal link 7, the middle of the rear longitudinal link 7 being hinged with a crank connector 54, the crank connector 54 being a component of the back rest assembly. In this embodiment, as shown in fig. 9, the crank connecting member 54 includes a third connecting plate 541 and a fourth connecting plate 542, and the third connecting plate 541 and the fourth connecting plate 542 are disposed to intersect to form a V-shaped structure. Wherein the fourth connection plate 542 is hinged with the rear support link 8. The crank connector 54 is connected to the seat mounting plate 41 by the rear support link 8. Specifically, the trailing end of the rear support link 8 (i.e., the end remote from the backrest 51) is hinged to the fourth connection plate 542 on the crank connector 54, and the leading end of the rear support link 8 is fixedly connected to the seat mounting plate 41. Meanwhile, the rear longitudinal link 7 is hinged with the crank connector 54 at the intersection of the third connecting plate 541 and the fourth connecting plate 542.
The first and second collapse links 32, 33 form a collapse linkage, and a generally quadrilateral self-locking closed-loop first linkage is formed by the seat mounting plate 41, the collapse linkage, the first transverse link 6, the rear longitudinal link 7, the crank connector 54 and the rear support link 8 for moving the footrest assembly 3 relative to the seat mounting plate 41 between the collapsed and extended positions.
When the first link mechanism is operated and the first transverse link 6 moves towards the footrest 31, as shown in fig. 5, the first transverse link 6 pushes the first collapse link 32 to rotate, the first collapse link 32 drives the third collapse link 34 to lift the footrest 31, and then drives the fourth collapse link 35 and the second collapse link 33 to rotate until the footrest 31 is at the extended position.
Conversely, when the first link mechanism operates to drive the first transverse link 6 to move in a direction away from the footrest 31, the first transverse link 6 pulls the first stool collapse link 32 to rotate, and the first stool collapse link 32 drives the third stool collapse link 34 to be brought back to the footrest 31, so that the foot stool assembly 3 is contracted. The connecting rod assembly is driven by the plurality of connecting rods, so that the movement is stable, the stretching process is coherent without trace jumping perception, the excellent experience is realized, and the comfort level of the product is improved.
Meanwhile, in this embodiment, the backrest assembly 5 includes a backrest 51, a second transverse link 52, and a third transverse link 53. In this embodiment, as shown in fig. 11, the backrest 51 is an L-shaped link, and two sides of the bending portion are respectively provided with a backrest insertion section 511 and a connection section 512. Wherein the back rest insertion section 511 is used for inserting the back rest. The connecting section 512 is hinged to the third transverse link 53 and the backrest 51 is hinged to the seat mounting plate 41 at a bend.
The second transverse connecting rod 52 is arranged on one side of the first transverse connecting rod 6 in parallel, and the third transverse connecting rod 53 is hinged with the tail end of the second transverse connecting rod 52. And the front end (i.e. the end far away from the footrest 31) of the second transverse connecting rod 52 is also hinged with a front longitudinal connecting rod 9, the middle part of the front longitudinal connecting rod 9 is hinged with a bottom connecting rod 11 fixedly connected with the base 1, the bottom connecting rod 11 is hinged with the tail end of the rear longitudinal connecting rod 7, and the third connecting plate 541 of the crank connecting piece 54 is hinged with the third transverse connecting rod 53. And as described in the first link mechanism above, the fourth connection plate 542 of the crank connector 54 is also hinged with the rear support link 8, and the crank connector 54 is connected with the seat mounting plate 41 through the rear support link 8. Specifically, the tail end of the rear support link 8 is hinged to the crank connector 54, and the head end of the rear support link 8 is fixedly connected to the seat mounting plate 41. Meanwhile, the rear longitudinal link 7 is hinged with the crank connector 54 at the intersection of the third connecting plate 541 and the fourth connecting plate 542.
The second link mechanism is formed by a third transverse link 53, a second transverse link 52, a front longitudinal link 9, a bottom link 11, a rear longitudinal link 7, and a crank connector 54 for driving the backrest assembly 5 between the retracted position and the reclined position.
When the second link mechanism is operated (i.e. the backrest assembly 5 moves to the reclined position), the longitudinal distance between the second transverse link 52 and the bottom link 11 increases, as shown in fig. 7, the second transverse link 52 moves away from the backrest 51, pulling the third transverse link 53 to turn the backrest 51 over relative to the seat mounting plate 41 until the backrest 51 is in the reclined position. And in this case a front support 10 is provided on the trailing end of the front longitudinal link 9.
As a preferred embodiment, referring to fig. 8, the front longitudinal link 9 includes a first connecting plate 91 and a second connecting plate 92, and the first connecting plate 91 and the second connecting plate 92 are disposed to intersect to form a V-shaped structure. The bottom link 11 is hinged to the front longitudinal link 9 at the intersection of a first connection plate 91 and a second connection plate 92, the first connection plate 91 being hinged to the second transverse link 52 and the second connection plate 92 being hinged to said front support 10. The front support 10 is fixedly connected to the seat mounting plate 41, and the longitudinal distance between the second transverse link 52 and the bottom link 11 increases during operation of the second linkage, during which the front longitudinal link 9 is inverted. Because the front longitudinal connecting rod 9 is hinged with the bottom connecting rod 11 at the intersection of the first connecting plate 91 and the second connecting plate 92, the second connecting plate 92 of the front longitudinal connecting rod 9 is hinged with the front supporting piece 10, and in the process of overturning the front longitudinal connecting rod 9, the front longitudinal connecting rod 9 lifts the front supporting piece 10, so that the height of the seat mounting plate 41 is lifted, and the purpose of driving the seat mounting plate 41 to lift is achieved. And the front longitudinal connecting rod 9 is of a V-shaped structure, compared with a straight connecting rod, the distance between the second transverse connecting rod 52 and the bottom connecting rod 11 is shortened, and the installation space is saved.
Simultaneously, the front longitudinal connecting rod 9 is provided with the draw-in groove 93 in the intersection department of first connecting plate 91 and second connecting plate 92, and preceding support piece 10 is equipped with the support extension section upwards towards the slope of footrest subassembly 3 direction, and is provided with locating part 101 on this support extension section, and in this scheme, locating part 101 is a columnar stopper. Specifically, the columnar limiting block is a shaft head penetrating through the limiting shaft of the front supporting piece. When the backrest 51 is in the retracted position, the cylindrical stopper abuts against the inner wall of the clamping groove 93. Form the stroke spacing to preceding longitudinal tie rod 9, avoid preceding longitudinal tie rod 9 to rotate beyond the stroke, and then prevent back rest 51 excessive rotation to surpass the preset point position that the folding position was located.
Conversely, when the second link mechanism operates to reduce the longitudinal distance between the second transverse link 52 and the bottom link 11 (i.e., when the backrest assembly 5 moves toward the retracted position), the second transverse link 52 moves toward the backrest 51, and pushes the third transverse link 53 to turn the backrest 51 relative to the seat mounting plate 41 until the backrest 51 is at the retracted position. In the process, the front longitudinal connecting rod 9 turns over, and the front longitudinal connecting rod 9 drives the front supporting piece 10 to descend, so that the height of the seat mounting plate 41 is reduced, and the purpose of driving the seat mounting plate 41 to descend is achieved.
The second link mechanism drives the seat mounting plate 41 to ascend or descend, so that the transmission mode that the sliding groove is used for jacking the seat frame in the market generally is overcome, the motion is stable, the stretching process is consistent, the micro-jumping sensing is avoided, the experience is excellent, and the requirements of people on material comfort are met. The footstool component 3 and the backrest component 5 are driven by two connecting rod mechanisms respectively, so that the structure operation is more stable, and the comfort of a user in the use process of the product is improved. Meanwhile, referring to fig. 12-15, in this embodiment, the seat mounting plate 41, the first transverse link 6 and the second transverse link 52 are parallel to each other, so that they do not interfere with each other during operation, and stable operation of the mechanism is ensured. And the seat mounting plate 41, the first transverse connecting rod 6 and the second transverse connecting rod 52 are positioned at the same height, so that the longitudinal height of the mechanical stretching unit 2 is greatly reduced, and the subsequent assembly of the mechanical stretching device is facilitated.
And the third transverse link 53 is provided with a second protrusion 531. Specifically, in this embodiment, the second protrusion 531 is a shaft head penetrating through the limiting shaft of the third transverse link 53. The second protrusion 531 abuts against the side wall of the rear support link 8 when the back rest 51 is in the reclined position. The second protrusion 531 abuts against the side wall of the rear support link 8 to form a limit, so that the backrest 51 is prevented from continuously leaning backwards and falling down.
In addition, the crank connecting member 54 is provided with a first protrusion 543 on the third connecting plate 541. Specifically, in this embodiment, the first protrusion 543 is a shaft head penetrating through the limiting shaft of the third connecting plate 541. The first protrusion 543 abuts against the side wall of the rear longitudinal link 7 when the footrest assembly 3 is in the folded position and the backrest assembly 5 is in the folded position.
In order to avoid dislocation of the first protrusion 543 and the rear longitudinal connecting rod 7, the rear longitudinal connecting rod 7 is provided with a limiting groove 71, and the first protrusion 543 abuts against the groove wall of the limiting groove 71 when the footrest assembly 3 is at the folding position and the backrest assembly 5 is at the folding position. When the second link mechanism performs a shrinking action (i.e. the second transverse link 52 approaches the bottom link 11), the first protrusion 543 presses the sidewall of the rear longitudinal link 7, so as to push the rear longitudinal link 7 to rotate, and then drive the first link mechanism to operate. The first connecting rod mechanism is contracted (namely, the first transverse connecting rod 6 moves towards the direction of the footrest 31), the first transverse connecting rod 6 pushes the first collapse connecting rod 32 to rotate, the first collapse connecting rod 32 drives the third collapse connecting rod 34 to lift the footrest 31, and then the fourth collapse connecting rod 35 and the second collapse connecting rod 33 are driven to rotate until the footrest 31 is in an extended position.
In this embodiment, the mechanical stretching unit 2 is further provided with a driving component 13 for driving the first link mechanism to operate. The driving assembly 13 comprises a spring 134, a first driving connecting rod 131 and a second driving connecting rod 132, the first stool collapse connecting rod 32 is hinged with the head end of the first driving connecting rod 131, and the tail end of the first driving connecting rod 131 is hinged with the head end of the second driving connecting rod 132. The tail end of the second driving link 132 is rotatably connected with the seat mounting plate 41, specifically, the tail end of the second driving link 132 is provided with a through hole, the seat mounting plate 41 is penetrated with a rotating shaft 133, and the rotating shaft 133 penetrates through the through hole, so that the second driving link 132 can rotate around the rotating shaft 133. And both ends of the spring 134 are connected to the first driving link 131 and the seat mounting plate 41, respectively. When the footrest assembly 3 is in the collapsed position, the first and second drive links 131, 132 are relatively close to being folded. And the second driving link 132 is provided with a third protrusion 1321, the first driving link 131 is provided with a groove 1311, the third protrusion 1321 is clamped in the groove 1311, and the spring 134 is in a stretched state. The spring 134 gives the first driving link 131 a restoring force, but the spring 134, the third protrusion 1321 and the groove wall of the groove 1311 are aligned, and the restoring force forces the third protrusion 1321 to abut against the groove wall of the groove 1311, so that the first driving link 131 and the second driving link 132 cannot be restored. When the footrest assembly 3 is in the extended position, only the second driving link 132 and the first driving link 131 need to be rotated downward, so that the third protrusion 1321 is separated from the groove 1311, and the spring 134 automatically drives the first driving link 131 to reset, so that the first stool collapse link 32 is lifted to enable the footrest assembly 3 to be in the extended position.
In addition, a plurality of support pipes 14 for improving the stability of the device and driving the two mechanical stretching units 2 to synchronously act are arranged between the two mechanical stretching units 2, and two ends of the support pipes 14 are respectively connected with the two mechanical stretching units 2. And as a preferred implementation mode, the two ends of at least one support tube 14 in the plurality of support tubes 14 are respectively connected with the front longitudinal connecting rods 9 in the two mechanical stretching units, so that the synchronous operation of the second connecting rod mechanisms at the two sides is ensured, and the lifting of the bottom mounting plate is more stable.
And in this solution, the base 1 is provided with a support assembly 12 for supporting the mechanical stretching unit 2. Specifically, the support assembly includes a support plate 121, the support plate 121 is connected to the base, and the support plate 121 is rotatably connected to the mechanical stretching unit 2 through a plurality of links. More specifically, the supporting plate 121 is hinged with a connecting rod group, the connecting rod group comprises a plurality of supporting connecting rods 122, and the head and the tail of two adjacent supporting connecting rods 122 are hinged with each other. Wherein the support link 122 at the head end is hinged with the support plate 121, and the support link 122 at the tail end is fixedly connected with the bottom link 11. So that the support assembly 12 can rotate with the morphological change of the mechanical stretching unit 2 for continuous support. Meanwhile, in the present embodiment, a bending link 123 is rotatably connected to the support link 122 at the tail end. As shown in fig. 10 and 15, the curved link 123 is divided into a first extension 1231 and a second extension 1232 along its length direction. Wherein the second extension 1232 is hinged to the support link 122 and the second extension 1232 is bent along its length in a direction away from the bottom link 11, and the first extension 1232 is hinged to the rear longitudinal link 7. The support link 122 is driven to rotate by the bending link 123 along with the rotation of the rear longitudinal link 7, and is prevented from interfering with the bottom link 11 by the bending of the second extension 1231 along its length in a direction away from the bottom link 11. And the first extension 1231 is also curved along its length in a direction away from the mechanical stretching unit 2. Avoiding interference of the first extension 1231 with the crank connector 54.
In the scheme, the hinging mode between the connecting rods adopts a bearing type kinematic pair of a column shaft and a bushing. Other means of articulation in the prior art may be used while ensuring that the extension device operates smoothly.
The invention and its embodiments have been described above by way of illustration and not limitation, and the invention is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present invention.
Claims (8)
1. A mechanical stretching unit, comprising: the foot stool assembly comprises a foot rest, a cushion supporting assembly and a backrest assembly, wherein a third stool collapse connecting rod and a fourth stool collapse connecting rod are connected to the foot rest, the third stool collapse connecting rod and the fourth stool collapse connecting rod are mutually parallel, a first stool collapse connecting rod is hinged to the third stool collapse connecting rod, a second stool collapse connecting rod is hinged to the fourth stool collapse connecting rod, the first stool collapse connecting rod is parallel to the second stool collapse connecting rod, and the second stool collapse connecting rod and the third stool collapse connecting rod are mutually intersected and hinged to the intersection;
The seat cushion support 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, the first transverse connecting rod is rotatably connected to a first stool collapse connecting rod in the foot stool assembly, the tail end of the first stool collapse connecting rod and the tail end of a second stool collapse connecting rod in the foot stool assembly are hinged with the seat mounting plate, the tail end of the first transverse connecting rod is hinged with a rear longitudinal connecting rod, the rear longitudinal connecting rod is hinged with the seat mounting plate through a rear support connecting rod, and the seat mounting plate, the first stool collapse connecting rod, the second stool collapse connecting rod, the first transverse connecting rod, the rear longitudinal connecting rod and the rear support connecting rod form a first connecting rod mechanism for driving the foot stool assembly to move between a furling position and an extending position relative to the seat mounting plate;
The backrest assembly comprises a backrest part 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 part is pivotally connected to the seat mounting plate, the tail end of the second transverse connecting rod is rotatably connected with the backrest part, the front end of the second transverse connecting rod is hinged with a front longitudinal connecting rod, the middle part of the front longitudinal connecting rod is hinged with a bottom connecting rod, the bottom connecting rod is hinged with 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 assembly to move between a folding position and a backward position;
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;
the seat mounting plate, the first transverse connecting rod and the second transverse connecting rod are mutually parallel;
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 crossing mode to form a V-shaped structure, the bottom connecting rod is hinged to the front longitudinal connecting rod at the intersection 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;
the first connecting rod mechanism is connected with the second connecting rod mechanism; the backrest piece drives the second link mechanism to shrink when moving to the backward position; when the second link mechanism is contracted, the second transverse link approaches the bottom link; the second link mechanism compresses the first link mechanism to shrink when doing shrinkage action;
The backrest assembly further comprises a third transverse connecting rod and a crank connecting piece, two ends of the third transverse connecting rod are respectively hinged with the backrest and the second transverse connecting rod, the head end of the crank connecting piece is hinged with 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 is abutted against the side wall of the rear longitudinal connecting rod, and when the second connecting rod mechanism performs contraction action, the first bulge presses the side wall of the rear longitudinal connecting rod;
The crank connecting piece comprises a third connecting plate and a fourth connecting plate, the third connecting plate and the fourth connecting plate are crossed to form a V-shaped structure, the third connecting plate is hinged with the third transverse connecting rod, the fourth connecting plate is hinged with the rear supporting connecting rod, and the rear longitudinal connecting rod is hinged with the crank connecting piece at the intersection of the third connecting plate and the fourth connecting plate.
2. The mechanical stretching unit according to claim 1, wherein the front longitudinal connecting rod is provided with a clamping groove at the intersection of the first connecting plate and the second connecting plate, the front supporting piece is provided with a limiting piece, and the limiting piece is propped against the inner wall of the clamping groove when the backrest piece is in the folding position.
3. The mechanical stretcher unit according to claim 1 wherein a second projection is provided on the third transverse link, the second projection abutting against a side wall of the rear support link when the back rest is in the reclined position.
4. A mechanical stretching device, characterized by comprising a base and two mechanical stretching units according to any one of claims 1-2, wherein the two mechanical stretching units are arranged on the base in a mirror symmetry manner, and the bottom connecting rods are fixedly connected with the base.
5. The mechanical stretching device according to claim 4, wherein a plurality of support tubes are provided between the two mechanical stretching units; the two ends of at least one support tube of the plurality of support tubes are respectively connected with the front longitudinal connecting rods of the two mechanical stretching units.
6. The mechanical stretching device according to claim 4, wherein a support assembly for supporting the mechanical stretching unit is provided on the base; the support assembly comprises a support plate, the support plate is connected with the base, a connecting rod group is hinged to the support plate, the connecting rod group comprises a plurality of support connecting rods, the heads and the tails of two adjacent support connecting rods are hinged to each other, the support connecting rods located at the head end are hinged to the support plate, and the support connecting rods located at the tail end are fixedly connected with the bottom connecting rods.
7. The mechanical stretching device according to claim 6, wherein the support link at the tail end is rotatably connected with a bending link, the bending link is divided into a first extending section and a second extending section along the length direction of the bending link, the second extending section is hinged with the support link, the first extending section bends along the length direction of the first extending section away from the bottom link, and the first extending section is hinged with the rear longitudinal link.
8. The mechanical stretching device according to claim 7, wherein the second extension is curved along its length in a direction away from the mechanical stretching unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010531243.3A CN111685520B (en) | 2020-06-11 | 2020-06-11 | Mechanical stretching unit and mechanical stretching device |
| PCT/CN2020/112281 WO2021248703A1 (en) | 2020-06-11 | 2020-08-28 | Mechanical extension units and electro-mechanical extension apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010531243.3A CN111685520B (en) | 2020-06-11 | 2020-06-11 | Mechanical stretching unit and mechanical stretching device |
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| CN111685520B true CN111685520B (en) | 2024-08-09 |
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| CN113273837B (en) * | 2021-05-27 | 2023-02-28 | 东莞市卓铭家具有限公司 | Anti-tipping seat |
| WO2023019926A1 (en) * | 2021-08-18 | 2023-02-23 | 锐迈机械科技（吴江）有限公司 | Contractible sofa linkage device, sofa support, and sofa |
| CN114055485B (en) * | 2021-10-14 | 2023-03-10 | 合肥中科蓝睿科技有限公司 | Cable trench inspection robot |
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| CN111839052A (en) * | 2020-06-11 | 2020-10-30 | 永艺家具股份有限公司 | Electromechanical stretching device |
| CN212630322U (en) * | 2020-06-11 | 2021-03-02 | 永艺家具股份有限公司 | Mechanical stretching unit and mechanical stretching device |
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| IT997583B (en) * | 1973-01-12 | 1975-12-30 | La Z Boy Chair Co | REST ARMCHAIR WITH VARIABLE HEIGHT BACKREST |
| US8419122B2 (en) * | 2010-01-25 | 2013-04-16 | L & P Property Management Company | Zero-wall clearance linkage mechanism for a high-leg seating unit |
| US9713559B2 (en) * | 2013-03-15 | 2017-07-25 | Stryker Corporation | Medical support apparatus |
| JP6302180B2 (en) * | 2013-07-08 | 2018-03-28 | 株式会社フジ医療器 | Chair massage machine |
| CN108113301A (en) * | 2018-01-26 | 2018-06-05 | 海安县立华钢铁制品有限公司 | Sofa double motor tool device |
| CN209499168U (en) * | 2018-06-15 | 2019-10-18 | 永艺家具股份有限公司 | A kind of functional frame and seat |
| CN209563817U (en) * | 2019-02-18 | 2019-11-01 | 浙江飞力科技股份有限公司 | The structure improved manual extending apparatus of sofa |
| CN209950818U (en) * | 2019-04-02 | 2020-01-17 | 顾家家居股份有限公司 | Mechanical stretching support and sofa |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111839052A (en) * | 2020-06-11 | 2020-10-30 | 永艺家具股份有限公司 | Electromechanical stretching device |
| CN212630322U (en) * | 2020-06-11 | 2021-03-02 | 永艺家具股份有限公司 | Mechanical stretching unit and mechanical stretching device |
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