CN216316592U - Mechanical extension unit of seat - Google Patents
Mechanical extension unit of seat Download PDFInfo
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- CN216316592U CN216316592U CN202122450624.1U CN202122450624U CN216316592U CN 216316592 U CN216316592 U CN 216316592U CN 202122450624 U CN202122450624 U CN 202122450624U CN 216316592 U CN216316592 U CN 216316592U
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- leg rest
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Abstract
The utility model discloses a mechanical extension unit of a seat, which comprises a back support piece, a seat support piece and a leg rest component capable of being folded or unfolded; the sitting support piece is connected to the base support piece of the seat, and a first connecting rod mechanism is arranged between the sitting support piece and the base support piece; a second connecting rod mechanism and a tilting rod are arranged between the back support piece and the seat support piece as well as between the back support piece and the base support piece; one end of the tilting rod is hinged on the base support piece, and the other end of the tilting rod is hinged on the second connecting rod mechanism or the back support piece; the leg rest assembly comprises a third link mechanism which deforms to enable the leg rest assembly to contract or expand; a rocker which can enable the third connecting rod mechanism and the seat support member to be linked is arranged on the base support member; when the back support piece tilts backwards, the seat support piece synchronously lifts around the base support piece under the linkage action of the support of the tilting rod and the second connecting rod mechanism; in the lifting process of the sitting support piece, the sitting support piece and the rocker jointly act on the third connecting rod mechanism to enable the leg rest component to be unfolded forwards at the same time.
Description
Technical Field
The utility model relates to the field of seats, in particular to a mechanical extension unit of a seat.
Background
The seat mechanical stretching device is a product with more application in the prior functional sofa seat, and a user can adjust different states of the sofa seat according to self requirements (such as sitting posture and lying posture), so that the sofa seat is comfortable and convenient; and with the higher and higher functional demands of consumers on the seat, the market of the multifunctional leisure chair is rapidly developed in recent years. From the earliest multifunctional leisure chairs with the single technology to the modern novel multifunctional leisure chairs with ergonomics; from the beginning that the multifunctional leisure chair loses the waist support of the user in the state of tilting up, namely commonly called 'running waist', to the development of the existing 'seat-back linkage technology', the hip and the seat surface are relatively fixed in the process of tilting up, and the back rubbing feeling is eliminated; and a leg rest component is additionally arranged on the multifunctional leisure chair, so that a leg rest is unfolded when a user leans to use, the whole body can be supported, and the comfort of the multifunctional leisure chair is further improved. These reflect the gradually rising requirements of people for the multifunctional leisure chair while enjoying the relaxation postures provided by the multifunctional leisure chair; however, most of the existing mechanical stretching devices are often provided with a plurality of driving components to separately drive the chair back part, the chair seat part and the footrest part, which results in that the internal structure of the chair is complex, the cost is high, and the popularization and the application cannot be widely realized; therefore, it is an increasing research effort of manufacturers to reasonably realize the linkage among the chair back, the chair seat and the footrest through the mechanical extension unit of the chair.
Disclosure of Invention
In order to solve the above technical problems, the present invention aims to provide a mechanical extension unit of a chair, which is simple to operate, has good stability and is in accordance with ergonomics; the mechanical stretching unit enables the first connecting rod mechanism and the second connecting rod mechanism to be linked through the supporting action of the tilting rod, so that the back support piece of the seat can be tilted backwards, and the seat support piece can be lifted synchronously; the linkage between the chair seat and the chair back is realized, and the problems of back rubbing and waist running are solved; the foot rest component is connected to the front end of the sitting support piece, a rocker is further arranged between the foot rest component and the base support, and the sitting support piece and the rocker can jointly act on the foot rest component to enable the foot rest component to be unfolded in the lifting process of the sitting support piece; the mechanical extension unit can realize the linkage of the back support piece, the seat support piece and the leg rest component.
The technical scheme of the utility model is realized as follows:
a mechanical extension unit of a seat comprises a back support, a seat support and a leg rest assembly which can be folded or unfolded; the sitting support piece is connected to the base support piece of the seat, and a first connecting rod mechanism is arranged between the sitting support piece and the base support piece so that the sitting support piece can be lifted relative to the base support piece; the back support piece is connected to the rear end of the seat support piece, and a second connecting rod mechanism and a tilting rod which enable the back support piece to be linked with the seat support piece when the back support piece tilts up are arranged between the back support piece and the seat support piece as well as between the back support piece and the base support piece; one end of the tilting rod is hinged on the base support piece, and the other end of the tilting rod is hinged on the second connecting rod mechanism or the back support piece; the leg rest assembly is connected to the front end of the sitting support piece and comprises a third link mechanism, and the third link mechanism deforms to enable the leg rest assembly to contract or expand; the third connecting rod mechanism comprises a first leg rest connecting rod and a second leg rest connecting rod which are positioned at the rear end; the first leg rest connecting rod and the second leg rest connecting rod are hinged on the seat support piece; a rocker capable of enabling the third connecting rod mechanism to be linked with the seat supporting piece is arranged at the front end of the base supporting piece, one end of the rocker is hinged to the base supporting piece, and the other end of the rocker is hinged to the third connecting rod mechanism; when the mechanical stretching unit bears a user and the back support piece is pushed by the user to tilt backwards, the seat support piece synchronously lifts around the base support piece under the supporting action of the tilting rod and the linkage action of the second connecting rod mechanism; in the lifting process of the sitting support piece, the sitting support piece and the rocker jointly act on the third connecting rod mechanism to enable the leg rest component to be unfolded forwards at the same time.
Preferably, the second link mechanism comprises a first guide rod and a second guide rod, two ends of the first guide rod and the second guide rod are respectively hinged with the back support and the seat support, and a four-link mechanism is formed among the back support, the first guide rod, the second guide rod and the seat support; in the process of tilting the back support, the second link mechanism deforms and drives the back support to move forwards and downwards or upwards and backwards.
Preferably, two ends of the tilting rod are respectively hinged to the base support piece and the back support piece; and the hinge point of the warping rod on the back support piece is positioned between the first guide rod and the second guide rod. The linkage between the back support piece and the seat support piece is realized through the supporting action of the tilting rod; when the back support piece tilts backwards, the second connecting rod mechanism drives the tilting rod to rotate around the hinge point on the support side plate; the tilting rod provides a reverse supporting force for the back support piece in the movement process in the rotation process, and the reverse supporting force is transmitted to the sitting support piece through the second connecting rod mechanism so that the sitting support piece correspondingly moves.
Preferably, one end of the tilting rod is hinged to the base support, and the other end of the tilting rod is hinged to any one of the first guide rod or the second guide rod. The other end of the tilting rod can be hinged on other connecting rods of the first connecting rod mechanism besides the back supporting piece.
Preferably, the first link mechanism comprises a first sitting support link and a second sitting support link, two ends of the first sitting support link are respectively hinged with the front part of the sitting support and the front part of the base support, and two ends of the second sitting support link are respectively hinged with the rear part of the sitting support and the rear part of the base support; a four-bar linkage is formed among the first sitting support connecting rod, the second sitting support connecting rod, the sitting support piece and the base support piece; when the sitting support piece is lifted relative to the base support piece, the second connecting rod mechanism is deformed to drive the front end of the sitting support piece to upwarp and integrally move backwards. The front end of the sitting support piece is tilted upwards and moves backwards integrally, so that the length of the leg rest component positioned below the sitting support piece can be lengthened correspondingly, and the feet of a user can be placed more comfortably.
Preferably, the sitting support member is located right above the base support member, the sitting support member is inclined relative to the horizontal plane, and the front end of the sitting support member is higher than the rear end of the sitting support member. So that the center of gravity of the human body is positioned at the rear part of the sitting support piece; in the process of linkage of the back support and the seat support, the gravity applied to the back support by the human body can form countermeasures with the gravity applied to the seat support; the design is ingenious, and the seat has comfortable sitting feeling when in use.
Preferably, the third linkage mechanism further comprises a third leg rest link, a fourth leg rest link, a fifth leg rest link and a sixth leg rest link; the front end of the third connecting rod mechanism is provided with a leg support connecting piece; the front end of the first leg rest connecting rod is hinged with the rear end of the third leg rest connecting rod; the front end of the second leg rest connecting rod is hinged with the rear end of the fourth leg rest connecting rod; the middle part of the second leg rest connecting rod is hinged with the middle rear part of the third leg rest connecting rod; the front end of the third leg rest connecting rod is hinged with the rear end of the fifth leg rest connecting rod, the front end of the fifth leg rest connecting rod is hinged with the rear end of the sixth leg rest connecting rod, and the front end of the sixth leg rest connecting rod is hinged on the leg rest connecting piece; the front end of the fourth footrest connecting rod is hinged to the footrest connecting piece, and the middle part of the fifth footrest connecting rod is hinged to the middle front part of the fourth footrest connecting rod. The leg rest components are folded and unfolded through the staggered connection of the plurality of leg rest connecting rods.
Preferably, the hinge point of the first footrest link on the seat support is positioned behind the hinge point of the second footrest link on the seat support; the rocker is hinged to the middle rear part of the first leg rest connecting rod.
Preferably, in a furled state, the first leg rest connecting rod and the second leg rest connecting rod are in a longitudinal upright state; in the lifting process of the sitting support piece, the sitting support piece and the rocker act on the first footrest connecting rod and the second footrest connecting rod to enable the first footrest connecting rod and the second footrest connecting rod to rotate to a transverse extending state; the third linkage is correspondingly deformed to deploy the leg rest assembly. The third connecting rod mechanism is correspondingly deformed by controlling the first leg rest connecting rod and the second leg rest connecting rod; simple and reliable structure and ingenious design.
Preferably, the seat support and the back support are both bar members extending in the front-rear direction of the seat.
The design starting point, the idea and the beneficial effects of the utility model adopting the technical scheme are as follows:
1. according to the mechanical stretching unit of the seat, the linkage between the seat supporting piece and the back supporting piece can be realized through the supporting functions of the first connecting rod mechanism, the second connecting rod mechanism and the tilting rod; namely, when a user applies back thrust to the back support, the seat support can be synchronously lifted around the base support; the linkage of the chair seat and the chair back is realized through a mechanical structure; when the chair back tilts backwards, the back support piece moves downwards and forwards to fit the back of the user; the seat supporting piece is lifted backwards, so that the seat can always play a role of supporting the waist of a human body; the problem of back rubbing and waist running when the seat is inclined backwards is comprehensively solved; the structure design is ingenious and accords with human engineering mechanics.
2. Only one tilting rod is designed, namely, the motion between the first link mechanism and the second link mechanism is related; when the user lies back using the chair, the back support is reclined backwards; the second connecting rod mechanism drives the warping rod to rotate around a hinge point on the supporting side plate; the tilting rod provides a reverse supporting force for the back support piece in the movement process in the rotation process, and the reverse supporting force is transmitted to the seat support piece through the second connecting rod mechanism so as to drive the seat support piece to correspondingly move. The force transmission is realized through the warping rod, the structure is simple and reliable, and the design is ingenious.
3. The leg rest component can be folded and unfolded through the deformation of the third connecting rod mechanism, and a first leg rest connecting rod and a second leg rest connecting rod at the rear end of the third connecting rod mechanism are hinged on the seat support piece; a rocker capable of acting on a third link mechanism is arranged between the first leg rest connecting rod and the base support piece; when the sitting support piece is lifted, the sitting support piece and the rocker jointly act on the third link mechanism to enable the third link mechanism to be unfolded; and then the leg rest component is synchronously linked with the seat support piece, so that the linkage relation among the back, the seat and the leg rest is realized.
4. In the mechanical extension unit, the linkage among the back support piece, the seat support piece and the leg rest component is bidirectional; the back support piece is inclined backwards to drive the seat support piece to be lifted and the leg rest component to be unfolded; similarly, when the leg rest component is acted on to enable the leg rest component to be changed from the unfolding state to the folding state, the seat support piece and the back support piece are reset synchronously.
5. The back support piece on this seat, the motion of sitting support piece and bracket subassembly, what adopt all is mutually independent link mechanism motion for in the use of seat, most force point do not have the interference, operate steadily, have promoted the reliability and the life of product.
Drawings
FIG. 1 is a schematic perspective view of a mechanical stretching unit according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a mechanical stretching unit in a folded position according to an embodiment of the present invention;
FIG. 3 is a perspective view of an embodiment of the mechanical extension unit of the present invention in a deployed position;
FIG. 4 is a schematic perspective view of a seat support member and a base support member coupled together according to an embodiment of the present invention;
FIG. 5 is a schematic perspective view of the leg rest assembly of an embodiment of the present invention shown in a collapsed configuration;
FIG. 6 is a schematic perspective view of a leg rest assembly of an embodiment of the present invention when deployed;
FIG. 7 is a perspective view of the back support and the seat support connected together according to an embodiment of the present invention;
FIG. 8 is a perspective view of the back support not reclined backward in accordance with embodiments of the present invention;
fig. 9 is a schematic perspective view of the back support leaning backward in an embodiment of the present invention.
The figures are numbered: a back support 1; a seat support 2; a leg rest assembly 3; a base support 4; a first link mechanism 5; a first seat support bar 6; a second seat support bar 7; a third link mechanism 8; a first leg rest link 8 a; a second leg rest link 8 b; a third leg rest link 8 c; a fourth footrest link 8 d; a fifth leg rest link 8 e; a sixth leg rest link 8 f; a leg rest attachment 9; a lower connecting plate 10; a rocker 11; a back support bar 1 a; the connecting rod 1b is rotated; a second link mechanism 12; a first guide bar 13; a second guide bar 14; a connecting plate 15; a hinged vertical plate 16; a limit pin 17; a seesaw bar 18.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
In the description of the present invention, the term "at least one" means one or more than one unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The present embodiment relates to reference orientations of components, such as front, rear, etc., which are described in a normal use state after a user is seated.
The specific embodiment of the utility model is as follows:
as shown in fig. 1 to 9, the present invention provides a mechanical extension unit of a seat, which comprises a back support 1, a seat support 2 and a leg rest assembly 3 capable of being folded or unfolded in sequence from the rear end of the seat to the front; the seat has a base support 4 located directly below the seat support 2, the base support 4 being for supporting the seat support 2.
As shown in fig. 1-3, the base support 4 is a side plate extending along the front-back direction of the seat, the sitting support 2 is connected to the base support 4, the sitting support 2 is a rod extending along the front-back direction of the seat, the sitting support 2 is inclined relative to the horizontal plane, and the front end of the sitting support 2 is higher than the rear end thereof. A first connecting rod mechanism 5 is arranged between the seat support member 2 and the base support member 4; the first linkage mechanism 5 comprises a first seat support connecting rod 6 and a second seat support connecting rod 7; the first sitting support connecting rod 6 is arranged between the front part of the sitting support 2 and the front end of the base support 4, and two ends of the first sitting support connecting rod 6 are respectively hinged with the sitting support 2 and the base support 4; the second sitting support connecting rod 7 is arranged between the rear part of the sitting support 2 and the rear end position of the base support 4, and two ends of the second sitting support connecting rod 7 are also hinged with the sitting support 2 and the base support 4 respectively; thus, a four-bar linkage mechanism is formed among the first seat support connecting rod 6, the second seat support connecting rod 7, the seat support part 2 and the base support part 4, namely the first connecting rod mechanism 5 is a four-bar linkage mechanism; the seat support 2 can be lifted backwards relative to the base support 4 by the first linkage 5, in particular: the mechanical extension unit has a folded position and an unfolded position, in the folded position, as shown in fig. 2, the first sitting support connecting rod 6 and the second sitting support connecting rod 7 are both inclined towards the front, and the front inclination angle of the first sitting support connecting rod 6 is larger than the front inclination angle of the second sitting support connecting rod 7; in the unfolded position, as shown in fig. 3, the first link mechanism 5 is deformed, so that the first seat support link 6 and the second seat support link 7 are both rotated to incline backward; the seat supporting piece 2 is tilted relative to the front end of the base supporting piece 4 and moves backwards integrally; the front part of the seat supporting piece 4 and the rear end of the base supporting piece 4 are respectively provided with a limit pin shaft 12, and the first seat supporting connecting rod 6 is abutted against the limit pin shaft 12 on the seat supporting piece 2 in the folded position; in the unfolded position, the second seat support link 7 abuts against a limit pin 12 on the base support 4.
As shown in fig. 1-6, the leg rest assembly 3 comprises a third linkage mechanism 8 and a leg rest connector 9 at the front end of the third linkage mechanism 8; the rear end of the third link mechanism 8 is connected to the seat support member 2 and the base support member 4, and the leg rest connecting member 9 is driven to fold or unfold by the movement of the third link mechanism 8; specifically, the method comprises the following steps: the third link mechanism 8 comprises a first footrest link 8a, a second footrest link 8b, a third footrest link 8c, a fourth footrest link 8d, a fifth footrest link 8e and a sixth footrest link 8f in sequence from back to front; in the unfolded state, the first footrest link 8a and the second footrest link 8b are arranged substantially in parallel in the vertical direction, and the first footrest link 8a is positioned below the second footrest link 8 b; the front end of the first leg rest connecting rod 8a is hinged with the rear end of the third leg rest connecting rod 8c, and the front end of the second leg rest connecting rod 8b is hinged with the rear end of the fourth leg rest connecting rod 8 d; the middle part of the second leg rest connecting rod 8b is hinged with the middle rear part of the third leg rest connecting rod 8 c; the rear end of the fifth leg rest connecting rod 8e is hinged with the front end of the third leg rest connecting rod 8c, and the front end of the fifth leg rest connecting rod 8e is hinged with the rear end of the sixth leg rest connecting rod 8 f; the middle front part of the fifth footrest connecting rod 8e is hinged with the middle part of the fourth footrest connecting rod 8 d; the front end of the sixth footrest connecting rod 8f is hinged with the footrest connecting piece 9; the front end of the fourth footrest connecting rod 8d is also hinged with the footrest connecting piece 9; in the unfolded state, the fourth leg rest link 8d is positioned above the sixth leg rest link 8 f; then, the third linkage mechanism can be reasonably contracted or expanded through the hinge mode, as shown in fig. 5, and in the contracted state, the first-sixth footrest links 8a-8f are all in a roughly longitudinal upright state; in the extended position, first-sixth leg rest links 8a-8f are each in a generally laterally extended position, as shown in figure 6.
In addition, the rear end of the third link mechanism 8 is connected to the sitting support 2 and the base support 4, so that when the sitting support 2 is lifted, the third link mechanism 8 will be linked synchronously, specifically: as shown in fig. 5 and 6, the rear end of the second footrest link 8b is hinged to the front end of the seat support 2, a lower connecting plate 10 is further disposed on the seat support 2, the lower connecting plate 10 protrudes downward from the seat support 2, the lower connecting plate 10 is located between the first seat support 6 and the hinge point between the second footrest link 8b and the seat support 2, and the rear end of the first footrest link 8a is hinged to the lower connecting plate 10; in addition, the front end of the base support piece 4 is hinged with a rocker 11, one end of the rocker 11 is hinged on the base support piece 4, and the other end of the rocker 11 is hinged at the middle rear part of the first leg rest connecting rod 8 a; and the hinge point of the rocker 11 on the base support 4 is located forward and below the hinge point of the first seat support bar 6 on the base support 4. Through the connecting structure, when the seat support 2 is lifted backwards relative to the base support 4, the seat support 4 will pull the first leg rest rocker 8a and the second leg rest rocker 8b backwards; the rocker 11 also acts on the first leg rest link 8a downwards, so that the first leg rest link 8a tends to move from a longitudinal standing state to a transverse extending state, and under the combined action of the seat support 2 and the rocker 11, the third link mechanism 8 can move from a contraction state to an expansion state, and linkage between the seat support 2 and the leg rest assembly 3 is realized.
As shown in fig. 1-3 and 7-9, the lower end of the back support 1 is connected to the sitting support 2, the back support 1 is a bent rod, the back support 1 includes a back support rod 1a and a rotation connecting rod 1b connected to the sitting support 2, and the rotation connecting rod 1b extends in a direction inclined forward and downward; a second connecting rod mechanism 12 is arranged between the back support member 1 and the seat support member 2; the second link mechanism 12 includes a first guide rod 13 and a second guide rod 14, and the respective two ends of the first and second guide rods 13 and 14 are respectively hinged to the rotating connecting rod 1b and the seat support 2, specifically: a vertically downward connecting plate 15 is arranged at the rear end of the sitting support member 2, and the connecting plate 15 is fixed on the sitting support member 2 through screw connection; a hinged vertical plate 16 extends downwards from the front end of the connecting plate 15, when the connecting plate is installed, the lower end of the first guide rod 13 is hinged with the front end of the rotating connecting rod 1b, and the upper end of the first guide rod 13 is hinged with the lower end of the hinged vertical plate 16; the lower end of the second guide rod 14 is hinged with the rear end of the rotating connecting rod 1b, the upper end of the second guide rod 14 is hinged with the rear end of the connecting plate 15, a limiting pin shaft 17 is further arranged on the second guide rod 14, and the limiting pin shaft 12 is abutted with the rotating connecting rod 1b to limit the rotating angle of the back support 3 relative to the seat support 2; a four-bar linkage mechanism is formed among the first guide rod 13, the second guide rod 14, the seat support 2 and the back support 1, namely the second linkage mechanism 12 is a four-bar linkage mechanism; the back support 1 can be tilted relative to the seat support 2 by deformation of the second linkage 12.
As shown in fig. 8 and 9, when the user is in a normal sitting posture, that is, the extension unit is in the retracted position, the back support rod 1a on the back support 1 approaches to the upright state of the backrest, the lower ends of the first and second guide rods 13 and 14 are both inclined to the rear, and the inclination angle of the second guide rod 14 is larger; when the user reclines backward using the chair, a backward back thrust is applied to the back support 1, and the back support 1 is forced to recline, so that the rotating link 1b moves forward; the four-bar linkage formed between the rotating connecting rod 1b and the first and second guide rods 13 and 14 and the seat support 2 is deformed, and the rotating connecting rod 1b moves forwards to enable the lower ends of the first and second guide rods 13 and 14 to rotate forwards around the connecting plate 15; in the process, the back support rod 1a tilts backwards, the angle between the back support piece 1 and the seat support piece 2 is increased, meanwhile, the height of the lower end of the back support piece 1 is reduced, and the back support piece 1 moves forwards relative to the seat support piece 2, so that the height of the back support piece 1 can be actively reduced and the back support piece 1 moves forwards to fit a user in the process of tilting backwards, the 'back rubbing feeling' can be eliminated, the user feels more comfortable, and the chair is more humanized to use; when the back support 1 is tilted backward to the fully unfolded position of the leisure chair, as shown in fig. 9, the lower ends of the first and second guide rods 13 and 14 are driven by the rotating connecting rod 1b to rotate forward to the maximum angle, and the maximum limited angle is reached between the back support 1 and the seat support 2.
As shown in fig. 1-3 and 7-9, a tilting rod 18 is further disposed between the rotating connecting rod 1b and the base support 4, and the tilting rod 18 can be used to synchronously tilt the back support 1 and lift the seat support 2; the method specifically comprises the following steps: one end of the warping rod 18 is hinged to the rotating connecting rod 1b, and a hinge point of the warping rod 18 is located between a hinge point of the first guide rod 13 and the rotating connecting rod 1b and a hinge point of the second guide rod 14 and the rotating connecting rod 1 b; the other end of the tilting rod 18 is hinged on the base support part 4; as shown in fig. 8 and 9, when the user lies back using the seat, the back support 1 is rotated backward by the reclining force of the user, and the second link mechanism 12 is deformed; so that the rotating link bar 1b of the lower end of the back support 1 is rotated forward and moved downward; meanwhile, the connecting rod 1b is rotated to drive the tilting rod 18 to rotate the upper end of the tilting rod 18 backwards around the base support 4; the tilting rod 18 provides a reverse supporting force for the rotating connecting rod 1b in the moving process in the rotating process, and the reverse supporting force is transmitted to the sitting support part 2 through the second connecting rod mechanism 12, so that the sitting support part 2 has a tendency of being lifted relative to the base support part 4, and then the first connecting rod mechanism 5 is correspondingly deformed, and the front end of the sitting support part 2 tilts and integrally moves backwards; meanwhile, the movement of the seat support part 2 drives the third link mechanism 17 to deform, so that the leg rest component 3 is unfolded forwards; namely, under the supporting action of the tilting rod 18, the first connecting rod mechanism 5 and the second connecting rod mechanism 12 synchronously deform, so that the back support member 1 tilts backwards, and the seat support member 2 synchronously lifts backwards; in the process of the movement of the seat supporting part 2, the third connecting rod mechanism 17 is driven to deform, and the leg rest component 3 is synchronously unfolded forwards; finally, the seat, the back and the leg rest of the leisure chair are linked.
Through the mechanical stretching unit, a user only needs to lean backwards to lie and apply acting force to the back support part 1 in the process of using the seat through a reasonable mechanical structure, and the back tilting, the seat cushion lifting and the leg rest extending of the seat can be realized; and the back support piece 1 will move forward and downward to fit the human body in the process of tilting backward, the sitting support piece 2 will be lifted up synchronously, the distance between the bottom of the back support piece 1 and the back of the sitting support piece 2 will be kept unchanged, the effect of 'zero displacement' is achieved, and the problem that the chair back runs waist when the chair back tilts backward in the prior art is solved; when the leisure chair needs to be restored again, the leg rest connecting piece 9 on the leg rest component 3 is pressed downwards, the leg rest component 3 is folded again, and the seat support piece 2 and the back support piece 1 are driven to move and reset at the same time; the operation and the use are both convenient, the human engineering is better met, and the user feels better. The movement of the back support piece 1, the movement of the seat support piece 2 and the movement of the leg rest assembly 4 are realized through the deformation of mutually independent connecting rods, so that the seat can stably run in the use process, no interference exists among all acting points, the seat can stably run, and the reliability and the service life of the product are improved; thereby reducing unnecessary waste of the product.
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 utility model, 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 utility model.
Claims (10)
1. A mechanical extension unit for a seat, comprising: comprises a back support, a seat support and a leg rest component which can be folded or unfolded; the sitting support piece is connected to the base support piece of the seat, and a first connecting rod mechanism is arranged between the sitting support piece and the base support piece so that the sitting support piece can be lifted relative to the base support piece; the back support piece is connected to the rear end of the seat support piece, and a second connecting rod mechanism and a tilting rod which enable the back support piece to be linked with the seat support piece when the back support piece tilts up are arranged between the back support piece and the seat support piece as well as between the back support piece and the base support piece; one end of the tilting rod is hinged on the base support piece, and the other end of the tilting rod is hinged on the second connecting rod mechanism or the back support piece; the leg rest assembly is connected to the front end of the sitting support piece and comprises a third link mechanism, and the third link mechanism deforms to enable the leg rest assembly to contract or expand; the third connecting rod mechanism comprises a first leg rest connecting rod and a second leg rest connecting rod which are positioned at the rear end; the first leg rest connecting rod and the second leg rest connecting rod are hinged on the seat support piece; a rocker capable of enabling the third connecting rod mechanism to be linked with the seat supporting piece is arranged at the front end of the base supporting piece, one end of the rocker is hinged to the base supporting piece, and the other end of the rocker is hinged to the third connecting rod mechanism; when the mechanical stretching unit bears a user and the back support piece is pushed by the user to tilt backwards, the seat support piece synchronously lifts around the base support piece under the supporting action of the tilting rod and the linkage action of the second connecting rod mechanism; in the lifting process of the sitting support piece, the sitting support piece and the rocker jointly act on the third connecting rod mechanism to enable the leg rest component to be unfolded forwards at the same time.
2. The mechanical extension unit of a seat of claim 1, wherein: the second connecting rod mechanism comprises a first guide rod and a second guide rod, two ends of the first guide rod and the second guide rod are respectively hinged with the back support part and the seat support part, and a four-connecting-rod mechanism is formed among the back support part, the first guide rod, the second guide rod and the seat support part; in the process of tilting the back support, the second link mechanism deforms and drives the back support to move forwards and downwards or upwards and backwards.
3. The mechanical extension unit of a seat of claim 2, wherein: two ends of the warping rod are respectively hinged to the base support piece and the back support piece; and the hinge point of the warping rod on the back support piece is positioned between the first guide rod and the second guide rod.
4. The mechanical extension unit of a seat of claim 2, wherein: one end of the tilting rod is hinged on the base support piece, and the other end of the tilting rod is hinged on any one of the first guide rod or the second guide rod.
5. The mechanical extension unit of a seat of claim 1, wherein: the first connecting rod mechanism comprises a first sitting support connecting rod and a second sitting support connecting rod, two ends of the first sitting support connecting rod are respectively hinged with the front part of the sitting support piece and the front part of the base support piece, and two ends of the second sitting support connecting rod are respectively hinged with the rear part of the sitting support piece and the rear part of the base support piece; a four-bar linkage is formed among the first sitting support connecting rod, the second sitting support connecting rod, the sitting support piece and the base support piece; when the sitting support piece is lifted relative to the base support piece, the second connecting rod mechanism is deformed to drive the front end of the sitting support piece to upwarp and integrally move backwards.
6. The mechanical extension unit of a seat of claim 5, wherein: the sitting support piece is positioned right above the base support piece, the sitting support piece is obliquely arranged relative to the horizontal plane, and the front end of the sitting support piece is higher than the rear end of the sitting support piece.
7. The mechanical extension unit of a seat of claim 1, wherein: the third connecting rod mechanism also comprises a third leg rest connecting rod, a fourth leg rest connecting rod, a fifth leg rest connecting rod and a sixth leg rest connecting rod; a leg rest connecting piece is arranged at the front end of the third connecting rod mechanism; the front end of the first leg rest connecting rod is hinged with the rear end of the third leg rest connecting rod; the front end of the second leg rest connecting rod is hinged with the rear end of the fourth leg rest connecting rod; the middle part of the second leg rest connecting rod is hinged with the middle rear part of the third leg rest connecting rod; the front end of the third leg rest connecting rod is hinged with the rear end of the fifth leg rest connecting rod, the front end of the fifth leg rest connecting rod is hinged with the rear end of the sixth leg rest connecting rod, and the front end of the sixth leg rest connecting rod is hinged on the leg rest connecting piece; the front end of the fourth footrest connecting rod is hinged to the footrest connecting piece, and the middle part of the fifth footrest connecting rod is hinged to the middle front part of the fourth footrest connecting rod.
8. The mechanical extension unit of a seat of claim 7, wherein: the hinge point of the first footrest connecting rod on the seat support is positioned behind the hinge point of the second footrest connecting rod on the seat support; the rocker is hinged to the middle rear part of the first leg rest connecting rod.
9. The mechanical extension unit of a seat of claim 8, wherein: in a furled state, the first leg rest connecting rod and the second leg rest connecting rod are in a longitudinal upright state; in the lifting process of the sitting support piece, the sitting support piece and the rocker act on the first footrest connecting rod and the second footrest connecting rod to enable the first footrest connecting rod and the second footrest connecting rod to rotate to a transverse extending state; the third linkage is correspondingly deformed to deploy the leg rest assembly.
10. The mechanical extension unit of a seat of claim 1, wherein: the seat supporting piece and the back supporting piece are rod pieces extending along the front-back direction of the seat.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120309585 | 2021-02-03 | ||
| CN2021203095850 | 2021-02-03 |
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| Publication Number | Publication Date |
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| CN216316592U true CN216316592U (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122450624.1U Active CN216316592U (en) | 2021-02-03 | 2021-10-12 | Mechanical extension unit of seat |
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| CN (1) | CN216316592U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115778130A (en) * | 2022-08-19 | 2023-03-14 | 一么么科技(浙江)有限公司 | Sofa forming method for reducing wall-against distance |
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2021
- 2021-10-12 CN CN202122450624.1U patent/CN216316592U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115778130A (en) * | 2022-08-19 | 2023-03-14 | 一么么科技(浙江)有限公司 | Sofa forming method for reducing wall-against distance |
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Effective date of registration: 20230906 Address after: 313000 Factory building No. 7, Jier Road West (Kangshan Industrial Park), Dipu Street, Anji County, Huzhou City, Zhejiang Province (independent application) Patentee after: YMO Technology (Zhejiang) Co.,Ltd. Address before: 313300 No.1, Yongyi West Road, Dipu Town, Anji County, Huzhou City, Zhejiang Province Patentee before: UE FURNITURE Co.,Ltd. |