CN214631129U

CN214631129U - Frame structure of multifunctional leisure chair

Info

Publication number: CN214631129U
Application number: CN202022747666.7U
Authority: CN
Inventors: 陈永春; 黄忠良; 陆成龙; 李文才; 李立波
Original assignee: UE Furniture Co Ltd
Current assignee: UE Furniture Co Ltd
Priority date: 2020-07-02
Filing date: 2020-11-24
Publication date: 2021-11-09
Anticipated expiration: 2030-11-24
Also published as: WO2022000968A1; CN113768305B; CN113768305A; CN214631100U

Abstract

The utility model discloses a multifunctional leisure chair frame structure, which comprises a back support piece, a seat support piece, a foot rest and a support seat; a first connecting rod mechanism and a tilting rod are arranged between the rear end of the seat supporting piece and the back supporting piece as well as the supporting seat; a second connecting rod mechanism is arranged between the seat supporting piece and the supporting seat; a third connecting rod mechanism is arranged among the seat supporting piece, the foot rest and the supporting seat; when the back support piece is pushed to lean backwards, the support piece is lifted up around the support seat under the supporting action of the tilting rod and the linkage action of the first link mechanism, and the foot rest is turned forwards under the linkage action of the third link mechanism; when the movement of the back support stops, the back support, the seat support and the foot rest are kept relatively fixed in a force balance state; when the leg rest bears the downward-pressing thrust, the back support piece, the sitting support piece and the leg rest are kept relatively fixed in the same way.

Description

Frame structure of multifunctional leisure chair

Technical Field

The utility model relates to a thing to sit on field, in particular to multi-functional leisure chair frame construction.

Background

Nowadays, 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 user can unfold a leg rest when lying for use, the whole body can be supported, and the comfort of the multifunctional leisure chair is further improved. These reflect the increasing demand for multi-function leisure chairs while people enjoy the relaxation postures provided by multi-function leisure chairs.

At present, most of the frame structures of multifunctional leisure chairs on the market often have only two basic positions: a standard stowed position and a reclined deployed position. In the stowed position, the seat portion is in a substantially horizontal position and the backrest is arranged to be substantially upright for use in a normal sitting position; in the deployed position, the backrest reclines rearward with the backrest in an obtuse relationship with the seat for resting or sleeping; when the leisure chair is used, the leisure chair can only be switched between the two positions, so that the leisure chair has the constraint property and cannot stay at any position between the folding position and the unfolding position; for this reason, it is a common practice to place a driving motor inside the leisure chair, and provide driving force through the driving motor so that the leisure chair can be locked and stopped at any position; although the electric driving device has the advantages of convenient operation and control, rapid adjustment and the like, the multifunctional leisure chair is expensive in manufacturing cost and difficult to maintain due to the arrangement of the motor, and cannot be widely popularized and applied; therefore, how to realize the use of the leisure chair by the user through the frame structure of the leisure chair itself is that the leisure chair can adjust the gravity of the user and stay between the folded position and the unfolded position, which becomes a direction in which many furniture manufacturers continuously pursue development and improvement.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model aims to provide a multifunctional leisure chair frame structure which is simple in operation, good in stability and in accordance with user engineering, and when in use, the stable transformation of the leisure chair from sitting posture, leisure posture to lying posture can be realized through the linkage of a first connecting rod mechanism, a second connecting rod mechanism and a third connecting rod mechanism, thereby meeting various requirements of sitting, leisure, sleeping and the like; when a user applies thrust to the back support piece, the back support piece tilts backwards, the seat support piece is synchronously lifted around the support seat under the supporting action of the tilting rod and the linkage action of the first link mechanism, and the foot rest is turned forwards around the seat support piece under the linkage action of the third link mechanism; when the desired backward-leaning angle is reached and the back thrust is not applied any more, at the moment, the gravity applied to the sitting support piece and the foot rest by the user and the reverse reset force transmitted to the back support piece by the sitting support piece through the first connecting rod mechanism reach the force balance, and the user is in a natural lying state; so that a user can naturally sit or lie at any position between the initial position and the final position of the leisure chair; the structure is ingenious, and the connecting rod mechanism of the leisure chair is realized without arranging an electric device.

The technical scheme of the utility model is realized like this:

a multifunctional leisure chair frame structure comprises a back support piece, a seat support piece, a foot rest and a support seat; a first connecting rod mechanism and a tilting rod which can enable the back support piece to be linked with the seat support piece when the back support piece tilts up are arranged between the rear end of the seat support piece and the back support piece as well as between the rear end of the seat support piece and the supporting seat; the sitting support piece is arranged above the supporting seat, the sitting support piece is obliquely arranged relative to the horizontal plane, the front end of the sitting support piece is higher than the rear end of the sitting support piece, and a second connecting rod mechanism which enables the sitting support piece to be lifted relative to the supporting seat is arranged between the sitting support piece and the supporting seat; one end of the tilting rod is hinged to the first connecting rod mechanism or the back support piece, and the other end of the tilting rod is hinged to the supporting seat; the footrest is hinged at the front end of the sitting support piece, and a third connecting rod mechanism which is linked with the sitting support piece when the footrest is unfolded or folded through overturning is also arranged among the sitting support piece, the footrest and the supporting seat; when the leisure chair frame bears a user and the back support piece is pushed by the user to tilt backwards, the seat support piece is synchronously lifted around the support seat under the supporting action of the tilting rod and the linkage action of the first link mechanism, and the foot rest is forwards overturned around the seat support piece under the linkage action of the third link mechanism; when the movement of the back support stops, the back support, the seat support and the foot rest are kept relatively fixed in a force balance state; when the leg rest bears the downward-pressing thrust, the back support piece, the sitting support piece and the leg rest are kept relatively fixed in the same force balance state.

The utility model discloses a multifunctional leisure chair frame structure, a first connecting rod mechanism and a second connecting rod mechanism are respectively arranged between a sitting support piece and a back support piece and between the sitting support piece and a supporting seat, and the linkage of the first connecting rod mechanism and the second connecting rod mechanism is realized through a warped rod; a third connecting rod mechanism is arranged between the front end of the sitting support piece and the foot rest, and when the sitting support piece moves, the third connecting rod mechanism controls the foot rest to turn forwards and unfold; then, when the leisure chair is used, a user only needs to apply back thrust to the back support piece to enable the leisure chair to do unfolding movement; the leg rest is pushed downwards to enable the leisure chair to reversely fold; the operation experience is better.

Preferably, the first link mechanism comprises a first guide rod and a second guide rod, a rotating support part is arranged at the lower end of the back support part, two ends of the first guide rod and the second guide rod are respectively hinged with the rotating support part and the seat support part, and a four-link mechanism is formed among the rotating support part, the first guide rod, the second guide rod and the seat support part; during the tilting process of the back support piece, the first connecting rod mechanism deforms and drives the seat support piece to move forwards and downwards or upwards and backwards.

Preferably, two sides of the rotating support part are provided with rotating side rods in a mirror image manner; the supporting seat comprises supporting side plates arranged at two sides in a mirror image manner; two ends of the warping rod are respectively hinged to the rotating side plate and the supporting side plate; and the hinge point of the warping rod on the rotating side plate 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 function of the tilting rod, and when a user uses the leisure chair to tilt backwards, the back support piece tilts backwards; the first 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 sitting support piece through the first connecting rod mechanism so that the sitting support piece correspondingly moves.

Preferably, one end of the seesaw rod is hinged to the support base, and the other end of the seesaw rod is hinged to any one of the first guide rod, the second guide rod or the back support member. The other end of the tilting rod can be hinged on other connecting rods of the first connecting rod mechanism besides the rotating side plate.

Preferably, the rotating side plate extends downwards and forwards to the lower part of the sitting support piece so as to be staggered with the sitting support piece, and the back support piece moves downwards synchronously when facing backwards. When the back support piece leans backwards, the back rubbing feeling can be eliminated through the movement of the rotating side plate.

Preferably, the second link mechanism comprises a first rocker and a second rocker, two ends of the first rocker are respectively hinged with the front part of the seat support member and the front part of the support seat, and two ends of the second rocker are respectively hinged with the rear part of the seat support member and the rear part of the support seat; a four-bar linkage is formed among the first rocker, the second rocker, the seat support piece and the support seat; in the process that the sitting support piece is lifted relative to the supporting seat, the second connecting rod mechanism is linked to realize the upwarping and the integral backward movement of the front end of the sitting support piece. The front end of the sitting support piece is tilted upwards and moves backwards integrally, so that the length of the foot rest under the sitting support piece can be lengthened correspondingly, and the feet of a user can be placed more comfortably.

Preferably, the third link mechanism comprises a third rocker, two ends of the third rocker are respectively hinged with the foot rest and the supporting seat, the rear end of the foot rest is hinged with the front end of the seat supporting piece, the hinged position of the third rocker and the foot rest is staggered with the hinged position of the foot rest and the seat supporting piece, and the hinged position of the third rocker and the supporting seat is staggered with the hinged position of the first rocker and the supporting seat; a five-bar linkage mechanism is formed among the seat supporting piece, the first rocking bar, the supporting seat, the third rocking bar and the foot rest. The third connecting rod mechanism and the second connecting rod mechanism both comprise first rockers, so that when the third connecting rod mechanism and the second connecting rod mechanism are deformed, the first rockers participate in the deformation, and the linkage relation between the third connecting rod mechanism and the second connecting rod mechanism is realized.

Preferably, the frame structure of the leisure chair further comprises an elastic member for applying damping when the back support, the seat support and the footrest are linked. So that the user has good damping feeling in the process of using the leisure chair.

Preferably, the elastic element is a gas spring, one end of the gas spring is hinged with the supporting seat, and the other end of the gas spring is hinged with any one of the foot rest, the seat supporting frame or the back supporting element.

Preferably, the gas spring is a constant force gas compression spring. The constant-force gas spring enables the leisure chair to always provide fixed elastic force in the state changing process of the leisure chair, and enables the leisure chair to keep stable damping feeling in the unfolding and folding processes.

Preferably, the back support and the seat support are both in a frame structure. The back support is the back support of the leisure chair, and the seat support is the seat support of the leisure chair.

Preferably, the footrest comprises a first footrest frame and a second footrest frame which are in sliding fit, and the first footrest frame is rotationally connected with the front end of the seat support piece; and in the rotating process of the first foot rest around the seat supporting piece, the second foot rest slides along the first foot rest to expand and contract under the action of the telescopic mechanism. When the first foot rest rotates around the seat support part by arranging the telescopic mechanism, the second foot rest is unfolded or contracted, and the turning and the unfolding of the foot rest are simultaneously carried out.

Preferably, the telescopic mechanism comprises a universal joint connecting rod, a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod are in running fit; the first connecting rod and the first footrest, and the second connecting rod and the second footrest are in running fit respectively; the two ends of the universal joint connecting rod are respectively connected to the first connecting rod and the seat supporting piece, and the universal joint connecting rod and the first connecting rod and the universal joint connecting rod and the seat supporting piece are respectively in rotating and swinging fit. Through setting up the universal joint connecting rod for can carry out the rotation of multi-angle better in certain extent between universal joint connecting rod and first connecting rod and the seat support piece.

Adopted above-mentioned technical scheme the utility model discloses a design departure point, theory and beneficial effect are:

1. the multifunctional leisure chair frame structure of the utility model can realize the linkage relation among the back support piece, the seat support piece and the foot rest through the linkage of the first, the second and the third link mechanisms and the support action of the warped rod; namely, when a user applies back thrust to the back support piece, the seat support piece can be lifted synchronously around the supporting seat, and the foot rest also turns forwards around the seat support piece to unfold the leisure chair; when the leisure chair needs to be folded and restored, the leisure chair can do folding movement only by applying pressing thrust to the foot rest; the structure is ingenious, and good operation experience feeling can be brought to a user.

2. In addition, when the user uses the leisure chair; when the back support piece is at a certain backward-leaning angle, the user does not apply back thrust any more; at the moment, the gravity applied by the user on the front end of the sitting support piece and the foot rest leads the leisure chair to have the trend of folding movement, and the gravity applied by the user on the rear end of the sitting support piece leads the leisure chair to have the trend of unfolding movement; the two trends form an antagonistic relationship, so that the back support piece, the seat support piece and the foot rest form a force balance state and are kept relatively fixed; the user can be in a natural lying state; the same applies to the back support at other backward angles; so that the leisure chair can stay at any position between the initial folding position and the backward final position.

3. The air spring with constant force is arranged, so that when the leisure chair tilts up, the air spring is stretched, and the damping provided by the air spring enables the leisure chair to smoothly run orderly from the folding position to the unfolding position; the leisure chair has good damping feeling when in use, and meanwhile, when a user leaves the leisure chair, the air spring provides reset elasticity, so that the leg rest can independently complete reset, and the body feeling of the user is more comfortable; furthermore, the existence of the gas spring can avoid the situation that the leisure chair is triggered at will when the leisure chair is unloaded.

4. The back support piece, the seat support piece and the foot rest on the leisure chair move by adopting the mutually independent four-bar linkage, so that most of force points do not have interference in the use process of the leisure chair, the operation is stable, and the reliability and the service life of the product are improved.

5. When the utility model is inclined by the user, the combined action of the second connecting rod and the third connecting rod realizes the upwarping and the integral backward movement of the front end of the seat supporting piece and the forward turning of the foot rest; the front end of the sitting support piece is tilted so that the length of the footrest connected with the sitting support piece can be designed to be longer, and the footrest does not wipe the bottom feet and the ground in the extending process under the condition of ensuring that the footrest is long enough; meanwhile, when the footrest frame is unfolded, the whole seat supporting piece can move backwards, so that the occupation of the front space is reduced, the front furniture or objects are not interfered, and the design is more humanized.

6. When the user lies backwards, the back support piece tilts backwards, and the first connecting rod is deformed so that the back support piece moves forwards relative to the sitting support piece while the back support piece tilts backwards; the back support piece is always attached to the user, the 'back rubbing feeling' of the user during reclining is eliminated, and the user engineering is met.

7. The utility model has simple and ingenious structure, the four-bar linkage mechanism is adopted between the sitting support piece and the foot rest, between the back support piece and the sitting support piece, and between the sitting support piece and the supporting seat, the structure is simple and the function is obvious, the leisure chair can stay at any position when in use without the driving force provided by the electric device such as the electric push rod, and the like, and the leisure chair can be controlled only by the user, thereby saving the production and processing cost; can be widely popularized and applied to leisure chairs.

Drawings

Fig. 1 is a schematic perspective view of the lower side surface of the leisure chair in the folded position according to the embodiment of the present invention;

fig. 2 is a schematic perspective view of the top of the leisure chair in the folded position according to the embodiment of the present invention;

fig. 3 is a schematic perspective view of the lower side surface of the leisure chair in the folded position according to the embodiment of the present invention;

fig. 4 is a schematic perspective view of the bottom of the leisure chair in the folded position according to the embodiment of the present invention;

fig. 5 is a schematic perspective view illustrating a connection between a back support and a seat support according to an embodiment of the present invention;

fig. 6 is a schematic perspective view of the first link mechanism in the embodiment of the present invention when the leisure chair is in the folded position;

fig. 7 is a schematic perspective view of the first link mechanism in the unfolded position of the leisure chair according to the embodiment of the present invention;

fig. 8 is a schematic perspective view of the second link mechanism in the embodiment of the present invention when the leisure chair is in the folded position;

fig. 9 is a schematic perspective view of the second linkage mechanism in the unfolded position of the leisure chair according to the embodiment of the present invention;

fig. 10 is a schematic perspective view illustrating the connection between the seat support and the foot rest according to the embodiment of the present invention;

FIG. 11 is an enlarged view of portion A of FIG. 10;

fig. 12 is a schematic top perspective view of the embodiment of the leisure chair of the present invention in the unfolded position;

fig. 13 is a schematic perspective view illustrating a connection relationship between the first and second foot rests and the telescopic mechanism according to the embodiment of the present invention;

fig. 14 is a schematic perspective view of the telescoping mechanism of the footrest in the embodiment of the present invention;

fig. 15 is a schematic perspective view of the back support and the rotation support in the embodiment of the present invention;

fig. 16 is an enlarged view of a portion B in fig. 15.

The figures are numbered: a seat support 1; a support base 2; a support base plate 2 a; a support side plate 2 b; a mounting hole 2 c; a chair leg component a; a vertical support rod b; a back support 3; a footrest frame 4; a first foot rest 5 a; a second foot rest 5 b; a front cross bar 6 a; a rear cross bar 6 b; a left vertical bar 7 a; a right vertical bar 7 b; connecting the longitudinal rod 8; a second link mechanism 9; a first rocker 10; a second rocker 11; a limit pin 12; a first footrest 13; a connecting vertical plate 14; rotating the connecting plate 15; a third rocker 16; the second link mechanism 17; a second footrest 18; a supporting vertical plate 19; a slide mechanism 20; a guide rail 2 a; a slider 20 b; a telescopic mechanism 21; a gimbal link 22; a first link 23; a second link 24; an upper link 24 a; a lower link 24 b; a connecting diagonal rod 24 c; a ball joint 25; a mounting plate 26; a rotation support portion 28; a support rail 28 a; the side lever 28b is rotated; a connecting frame 29; a left link 30; a right link 31; a lower cross bar 32; a mount 33; a mounting back plate 33 a; a mounting side plate 33 b; a flap 34; a holding frame 35; a clamping plate 36; the first link mechanism 37; a first guide bar 38; a second guide bar 39; a connecting plate 40; hinged vertical plate 41; a seesaw lever 42; a gas spring 43; the first connecting lug 44 a; a second engaging lug 44 b; an armrest frame 45.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. 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 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 parts, such as front, rear, etc., in a state where a user is positioned in front of the multifunctional leisure chair and facing the leisure chair.

The specific implementation manner of the utility model is as follows:

as shown in fig. 1-16, the utility model provides a multifunctional leisure chair frame structure, which comprises a seat support member 1, a support seat 2, a back support member 3, a foot rest 4 and a chair leg assembly a, wherein the support seat 2 is connected and fixed on the upper end of the chair leg assembly a.

As shown in fig. 2-5, the supporting base 2 includes a supporting bottom plate 2a and a supporting side plate 2b, the supporting side plate 2b is formed by extending along two sides of the supporting bottom plate 2a in a direction obliquely forward and upward, a mounting hole 2c is formed in the middle of the supporting bottom plate 2a, a vertical supporting rod b is disposed in the middle of the chair leg assembly a, the vertical supporting rod b can be an air rod, and the supporting bottom plate 2a and the chair leg assembly a are rotatably inserted and matched through the mounting hole 2 c.

As shown in fig. 1-4 and 8-9, the sitting support member 1 is located above the supporting seat 2, the sitting support member 1 is disposed in an inclined manner relative to the horizontal plane, the front end of the sitting support member is higher than the rear end of the sitting support member, the sitting support member 1 is a frame shaped like a Chinese character kou, the sitting support member 1 includes front and rear cross bars 6a and 6b, left and right longitudinal bars 7a and 7b, and a connecting longitudinal bar 8, the connecting longitudinal bar 8 is located between the left and right longitudinal bars 7a and 7b, and two ends of the connecting longitudinal bar 8 are respectively connected and fixed to the front and rear cross bars 6a and 6 b; as shown in fig. 8 and 9, a second link mechanism 9 is arranged between the seat support 1 and the support seat 2; the second connecting rod mechanism 9 comprises a first rocker 10 and a second rocker 11, the first rocker 10 is arranged between the front part of the sitting support member 1 and the front end position of the support side plate 2b, and two ends of the first rocker 10 are respectively hinged with the connecting longitudinal rod 8 and the support side plate 2b on the sitting support member 1; the second rocker 11 is arranged between the rear part of the seat support member 1 and the rear end position of the support side plate 2b, and two ends of the second rocker 11 are also hinged with the connecting longitudinal rod 8 on the seat support member 1 and the support side plate 2b respectively; thus, a four-bar linkage is formed among the first rocker 10, the second rocker 11, the seat support 1 and the support seat 2, namely the second linkage 9 is a four-bar linkage; the seat support 1 can be lifted backwards relative to the support base 2 by the second link mechanism 9, specifically: the leisure chair has a folding position and an unfolding position, wherein in the folding position, as shown in fig. 8, the first rocker 10 and the second rocker 11 are both inclined towards the front, and the front inclination angle of the first rocker 10 is larger than that of the second rocker 11; in the unfolded position, as shown in fig. 9, the second linkage 9 is deformed, so that the first rocker 10 and the second rocker 11 both rotate to tilt backward; the seat supporting piece 1 is tilted relative to the front end of the supporting seat 2 and moves backwards integrally; the front and rear positions of the supporting side plate 2b are respectively and correspondingly provided with a limit pin shaft 12, and when the first rocker 10 and the second rocker 11 rotate backwards to be abutted against the limit pin shaft 12; the sitting support 1 moves backward to the maximum distance.

As shown in fig. 1-4 and 10-13, the footrest 4 includes a first footrest 5a and a second footrest 5b, the first footrest 5a includes a first footrest 13 and connecting vertical plates 14 respectively connected to the left and right sides of the first footrest 13, the connecting vertical plates 14 are sheet metal members, and have high strength and economy, a rotating connecting plate 15 is correspondingly arranged at the front end of the connecting longitudinal rod 8 of the sitting support 1, and the connecting vertical plates 14 and the rotating connecting plate 15 are hinged to each other, so that the first footrest 5a can be turned around the front end of the sitting support 1; a third rocker 16 is connected between the vertical connecting plate 14 and the front part of the supporting side plate 2b, the upper end of the third rocker 16 is hinged with the vertical connecting plate 14, and the hinged position of the third rocker 16 and the vertical connecting plate 14 is positioned in front of the rotary connecting position of the vertical connecting plate 14 and the rotary connecting plate 15; the lower end of the third rocker 16 is hinged with the supporting side plate 2b, and the hinged position is positioned in front of the hinged position of the first rocker 10 and the supporting side plate 2 b; namely, a third link mechanism 17 is formed among the first rocker 10, the seat supporting piece 1, the third rocker 16, the first foot rest 5a and the supporting seat 2, and the third link mechanism 17 is a five-link mechanism; the third linkage 17 also comprises a first rocker 10, which in turn allows a linkage between the second linkage 9 and the third linkage 17.

As shown in fig. 13 and 14, the second footrest 5b is stacked on the first footrest 5a, the second footrest 5b includes a second footrest 18, and a pair of supporting vertical plates 19 disposed at intervals are disposed on two sides of the second footrest 18; the second foot rest 5b is in sliding fit with the first foot rest 5a through a sliding mechanism 20, specifically: the sliding mechanism 20 comprises a guide rail 20a and a sliding block 20b, the guide rail 20a is fixedly connected to the connecting vertical plate 14, the guide rail 28 is made of plastic materials and can reduce production cost, the sliding block 20b is strip-shaped, the sliding block 20b is fixed on two sides below the second footrest 18, the sliding block 20b is clamped and fixed between the two supporting vertical plates 19, and the supporting vertical plates 19 provide transverse supporting force for the sliding block 20b, so that the second footrest 5b can be stably unfolded and retracted along the first footrest 5a in a sliding manner.

A telescopic mechanism 21 is further arranged below the seat support member 1, the first foot rest 5a and the second foot rest 5b, the telescopic mechanism 21 can control the sliding and stretching of the second foot rest 5b, and the telescopic mechanism 21 comprises a universal joint connecting rod 22, a first connecting rod 23 and a second connecting rod 24; the first connecting rod 23 and the second connecting rod 24 are in running fit, and the first connecting rod 23 and the first foot rest 5a, and the second connecting rod 24 and the second foot rest 5b are in running fit, specifically: the first footrest 5a comprises a front footrest 13 and a rear footrest 13 which are arranged at intervals, the first connecting rod 23 is positioned below the front footrest 13, and the middle part of the first connecting rod 23 is rotationally connected with the first footrest 13 at the front end; the second connecting rod 24 comprises an upper connecting rod 24a and a lower connecting rod 24b which are staggered in height, the upper connecting rod 24a and the lower connecting rod 24b are connected through a connecting diagonal rod 24c, the upper connecting rod 24a is rotatably connected to the middle position of the front end of the second footrest 18, the lower connecting rod 24b and the first connecting rod 23 are positioned on the same horizontal plane, and the rear end of the lower connecting rod 24b is rotatably connected with the front end of the first connecting rod 23. The two ends of the universal joint connecting rod 22 are respectively connected to the first connecting rod 23 and the front cross rod 6a of the seat support member, the two ends of the universal joint connecting rod 22 are both ball joints 25, the front end of the universal joint connecting rod 22 is in rotating and swinging fit with the rear end of the first connecting rod 23, the front cross rod 6a of the seat support member is provided with a downward mounting plate 26, and the rear end of the universal joint connecting rod 22 is in rotating and swinging fit with the mounting plate 26.

As can be seen from the above, the second link mechanism 9 and the third link mechanism 17 both include the first rocker 10, that is, the two mechanisms share the first rocker 10, that is, when the second link mechanism 9 and the third link mechanism 17 deform, the first rocker 10 participates in the deformation process, so that the deformation between the second link mechanism 9 and the third link mechanism 17 generates linkage, specifically: when the sitting support piece 1 is stressed and tilts backwards relative to the supporting seat 2 through the second connecting rod mechanism 9, the sitting support piece 1 moves backwards, the upper ends of the first rocker 10 and the second rocker 11 rotate backwards around the supporting side plate 2b to a pulling-up position, and the front end of the sitting support piece 1 is lifted up and tilted upwards after the first rocker 10 is pulled up; when sitting support piece 1 front end upwarp and the motion of wholly shifting backward, third link mechanism 17 deformation makes to sit support piece 1 and can drive first foot rest 5a and overturn forward simultaneously, specifically indicates: because a five-bar linkage mechanism is formed among the sitting support member 1, the first rocker 10, the third rocker 16, the first foot rest 5a and the support seat 2, when the front end of the sitting support member 1 tilts and moves backwards, the upper end of the first rocker 10 rotates backwards, the rotating connecting plate 15 connected with the front end of the longitudinal rod 8 in the sitting support member pulls the first foot rest 5a backwards, and the third rocker 16 rotates backwards around the hinged point of the third rocker and the support side plate 2b simultaneously, so that the first foot rest 5a is driven to turn forwards relative to the sitting support member 1; meanwhile, when the first footrest 5a is turned over forwards, the universal joint connecting rod 22 rotates forwards around the mounting plate 26, the connecting end of the universal joint connecting rod 22 and the first connecting rod 23 pulls the first connecting rod 23 backwards to enable the first connecting rod 23 to rotate around the hinge point of the first connecting rod 23 and the front first footrest 13, the first connecting rod 23 rotates and drives the second connecting rod 24 to rotate, and the second connecting rod 24 rotates to enable the second footrest 5b to slide and unfold along the first footrest 5 a; when the first rocker 10 and the second rocker 11 rotate to abut against the limit pin shaft, the front end of the seat supporting piece 1 tilts upwards to the maximum height, the first connecting rod 23 and the second connecting rod 24 are in the same straight line state, the first foot rest 5a turns forwards to the maximum angle relative to the seat supporting piece 1, and the second foot rest 5b completely slides out relative to the first foot rest 5 a.

Through the linkage between the second link mechanism 9 and the third link mechanism 17, in the use process of the leisure chair, the front end of the seat support member 1 is forced to upwarp and the whole seat support member 1 moves backwards, the first foot rest 5a can form linkage with the seat support member 1, the first foot rest 5a simultaneously turns forwards, and the telescopic mechanism 21 simultaneously controls the second foot rest 5b to slide and unfold along the first foot rest 5a due to the turning of the first foot rest 5 a; the opening and closing of the footrest 4 can be completed only by controlling the movement of the sitting support piece 1, and the operation is convenient; in addition, in the process of turning and unfolding the first and second leg rest 5a, 5b, the front end of the seat support part 1 can be upwarped and lifted for a certain height, so that the foot rest 4 can be ensured not to wipe the feet and the ground in the process of extending out under the condition that the leg rest 4 is designed to be long enough; and after the footrest 4 overturns and expands, the seat support piece 1 can move backwards as a whole, so that the occupation of the front space after the footrest stretches out can be reduced, the furniture is prevented from being interfered, and the integral design is very reasonable and humanized.

As shown in fig. 1, 2, 15 and 16, the lower end of the back support 3 is connected to the seat support 1, the back support 3 is of a frame structure, a rotation support 28 is provided at the lower end of the back support 3, and the back support 3 is connected and fixed to the rotation support 28; the rotation support part 28 comprises a support cross bar 28a and rotation side bars 28b respectively connected to two sides of the support cross bar 28a, the rotation side bars 28b are formed by extending along two sides of the support cross bar 28a in a diagonal forward and downward direction, a downwardly protruding connecting frame 29 shaped like a Chinese character 'kou' is arranged at the middle position of the lower end of the back support 3, the connecting frame 29 is fixedly connected to the support cross bar 28a, and the specific connection mode is as follows: the connecting frame 29 comprises left and right connecting rods 30, 31 and a lower cross bar 32, a mounting seat 33 is correspondingly arranged at the middle position of the supporting cross bar 28a, the mounting seat 33 includes a mounting back plate 33a and mounting side plates 33b connected to both sides of the mounting back plate 33a, the mounting back plate 33a is welded at the middle position of the supporting cross bar 28a, a folded plate 34 which can cover the connecting frame 29 extends from one end of the mounting side plate 33b far away from the supporting cross bar 28a along the inner side direction, and the left and right connecting rods 30, 31 are respectively provided with a clamping frame 35, clamping plates 36 are arranged at the front and back of the clamping frame 35 to clamp the front and back ends of the left and right connecting rods 30, 31, when the device is installed, firstly, the clamping frame 35 is fixed on the left and right connecting rods 30 and 31 through screws, the connecting frame 29 is then placed in the mounting seat 33 and is connected and fixed with the mounting back plate 33a through bolts.

As shown in fig. 1 to 7, a first link mechanism 37 is disposed between the back support 3 and the seat support 1, the first link mechanism 37 includes a first guide rod 38 and a second guide rod 39, two ends of each of the first and second guide rods 38 and 39 are respectively hinged to the rotating side rod 28b and the connecting longitudinal rod 8, specifically: a vertically downward connecting plate 40 is arranged on the connecting longitudinal rod 8, and the connecting plate 40 is fixed at the rear end of the connecting longitudinal rod 8 through screw connection; a hinged vertical plate 41 extends downwards from the front end of the connecting plate 40, when the connecting plate is installed, the lower end of the first guide rod 38 is hinged with the front end of the rotating side rod 28b, and the upper end of the first guide rod 38 is hinged with the lower end of the hinged vertical plate 41; the lower end of the second guide rod 39 is hinged with the rear end of the support side plate 38b, the upper end of the second guide rod 39 is hinged with the rear end of the connecting plate 40, a limit pin shaft 12 is further arranged on the second guide rod 39, and the limit pin shaft 12 is abutted with the rotating side rod 28b to limit the rotating angle of the back support 3 relative to the support part 1; a four-bar linkage mechanism is formed among the first guide rod 38, the second guide rod 39, the seat support part 1 and the rotation support part 28 on the back support part, namely the first linkage mechanism 37 is a four-bar linkage mechanism; the back support 3 can be tilted with respect to the sitting support 1 by deformation of the first linkage 37.

As shown in fig. 1-3, when the user is in a normal sitting position, i.e. the leisure chair is in a folded position, the back support 3 approaches to the upright state of the backrest, the lower ends of the first and second guide rods 38, 39 are both inclined to the rear, and the inclination angle of the second guide rod 39 is larger; when the user reclines backward, a backward back thrust is applied to the back support 3, and the back support 3 is forced to recline, so that the rotation support 28 moves forward; the first link mechanism 37 formed between the rotating side lever 28b on the rotating support 28 and the first and second guide rods 32 and 33 and the seat support 1 is deformed, and the rotating side lever 28b moves forward to make the lower ends of the first and second guide rods 32 and 33 rotate forward around the connecting plate 40; in the process, the back support 3 connected to the rotating support part 28 tilts backwards, the angle between the back support 3 and the seat support 1 is increased, and meanwhile, the height of the lower end of the back support 3 is reduced and the back support 3 moves forwards relative to the seat support 1, so that the height of the back support 3 can be actively reduced and the back support can move forwards to fit a user in the process of tilting backwards, the 'back rubbing feeling' is eliminated, and the user can feel more comfortable; when the back support 3 is tilted backward to the full-unfolded position of the leisure chair, as shown in fig. 3 and 7, the lower ends of the first and second guide rods 32 and 33 are driven by the rotating side rod 28b to rotate forward around the first and second connecting upright plates 36a and 36b to a maximum angle, and at this time, a maximum limited angle is reached between the back support 3 and the seat support 1.

As shown in fig. 1-7, a tilting rod 42 is further disposed between the rotating side rod 28b and the supporting side plate 2b of the supporting seat 2, and the tilting rod 42 can realize the synchronous backward tilting of the back support 3 and the lifting of the seat support 1; the method specifically comprises the following steps: one end of the tilted rod 42 is hinged to the rotating side rod 28b, and a hinge point of the tilted rod 42 is located between a hinge point of the first guide rod 38 and the rotating side rod 28b and a hinge point of the second guide rod 39 and the rotating side rod 28 b; the other end of the tilting rod 42 is hinged on the supporting side rod 2 b; as shown in fig. 6 to 7, when the user lies backward using the leisure chair, the back support 3 is rotated backward by the leaning force of the user, and the first link mechanism 37 is deformed; so that the rotation support portion 28 of the lower end of the back support 3 rotates forward and moves downward; the rotating support part 28 drives the tilting rod 42 to rotate the tilting rod 42 backwards around the support side plate 2 b; the tilting rod 42 provides a reverse supporting force for the rotation supporting part 28 in the movement process in the rotation process, and the reverse supporting force is transmitted to the seat supporting part 1 through the first connecting rod mechanism 37, so that the seat supporting part 1 has a tendency of being lifted relative to the supporting seat 2, the second connecting rod mechanism 9 is correspondingly deformed, and the front end of the seat supporting part 1 tilts and integrally moves backwards; simultaneously, the third link mechanism 17 is deformed, and the leg rest 4 is turned forward and unfolded; namely, under the supporting action of the tilting rod 42, the first link mechanism 37 and the second link mechanism 9 are deformed synchronously, so that the back support member 3 tilts backwards and the seat support member 1 is lifted backwards synchronously; in the process of the movement of the seat supporting part 1, the third connecting rod mechanism 17 is driven to deform, and the foot rest 4 is synchronously turned forwards and opened; finally, the linkage of the seat, the back and the foot rest of the leisure chair is realized, so that the user only needs to apply acting force to the back-to-back support 3 by leaning backwards in the use process, and the stable transformation of the leisure chair from sitting posture, leisure posture to lying posture can be realized; when the leisure chair needs to be restored again, the leg rest 4 is pushed downwards; the operation is convenient, and various requirements of sitting posture, leisure, sleeping and the like are met; convenient to use, the body is felt better. The movement of the back support piece 3, the movement of the seat support piece 1 and the movement of the foot rest 4 all adopt mutually independent four-bar motion, so that the leisure chair runs stably in the use process, no interference exists among all acting points, the running is stable, the reliability of the product is improved, and the service life of the product is prolonged; thereby reducing unnecessary waste of the product.

One of the more important designs is: through the design of the link mechanism, when a user uses the leisure chair, the leisure chair can stay at any position between the furling position (namely the initial position) and the unfolding position (namely the final position of backward leaning), the user can sit or lie naturally at the position, and the leisure chair cannot shake. Specifically, the method comprises the following steps: when the leisure chair is in the initial folding position, if the back of the user is not in contact with the back support piece, the gravity of the user downwards acts on the sitting support piece 3, and the sitting support piece 3 is inclined at the initial position and is relatively fixed with the supporting seat 2, so that the leisure chair cannot be changed at the moment, and the leisure chair can be used by the user in a normal sitting posture state. When a user needs to lie, the back actively leans backwards on the back support 3, so that the back support 3 leans backwards, and meanwhile, the sitting support 1 is lifted and the foot rest 4 is turned forwards to open the legs; when the back support piece 3 reaches the backward-leaning angle desired by the user, the user does not exert back thrust on the back support piece 3 any more, the movement of the back support piece 3 stops, the self gravity of the user is exerted on the leisure chair at the moment, and the back support piece 3, the sitting support piece 1 and the foot rest 4 are in a stress balance state, so that the leisure chair can stay at the position and enable the user to be in a natural lying state; the method specifically comprises the following steps: at the moment, a user lies on the leisure chair, the sitting support 1 is in a lifting state, and the gravity applied to the front end of the sitting support 1 and the foot rest 4 by the user enables the leisure chair to have a folding trend; the weight force exerted by the user on the rear end of the seat support 1 and the back support 3 causes the leisure chair to tend to remain unfolded; the two are mutually resisted and are balanced in stress, so that a user can recline the leisure chair to a required reclining angle when using the leisure chair, and the use is more humanized; the comfort is higher.

As shown in fig. 1 to 4 and 12, the supporting side plates 2b on the two sides are further respectively provided with armrest frames 45, and when the user uses the leisure chair, the user can rest his hands on the armrest frames 45; the hand holding the handrail frame 45 is easier to lean backwards, so that the use is more convenient; an elastic part for applying damping when the back support part 3, the seat support part 1 and the foot rest 4 are linked is further arranged between the seat support part 1 and the support seat 2, the elastic part is an air spring 43, and specifically: a first connecting lug 44a and a second connecting lug 44b are correspondingly arranged on the front cross bar 6a and the mounting backboard 44a on the seat support member 1, the first connecting lug 44a faces downwards, the upper end of the first connecting lug 44a is fixedly connected on the front cross bar 6a, the second connecting lug 44b faces downwards, the bottom of the second connecting lug 44b is fixedly connected on the mounting backboard 44a, the head of the gas spring 43 is hinged with the first connecting lug 44a, and the tail of the gas spring 43 is hinged with the second connecting lug 44 b; the air spring 43 is a constant-force air pressure spring, and the air spring 43 is stretched in the unfolding process of the leisure chair to provide the reset elastic force of the seat support 1, so that a user can feel good damping adjustment feeling when using the leisure chair; when the leisure chair is reset, the user can be assisted to reduce the acting force on the foot rest 4; in addition, the constant-force gas spring 43 always provides fixed elastic force, so that the leisure chair can provide damping feeling with the same effect at any position in the using process, and can run more stably; the user feels better.

In conclusion, when the multifunctional leisure chair frame structure is used, the supporting and sitting method is as follows:

the user is just sitting on this leisure chaise longue, when needs lie, back thrust is applyed to back support piece, make back support piece pitch-back, it is first simultaneously, the second, make under third link mechanism's the effect sit support piece lift and the bracket upwards overturns forward with the both legs lifting, when reaching the desired angle of pitch-back, no longer exert back thrust, at this moment, the user is applyed and is sitting support piece, gravity on the bracket reaches the force balance with the reverse power that resets that sits support piece and conduct to back support piece through first link mechanism, the user can be in the state of lying naturally.

When the user needs to lie at a larger angle, the user applies back thrust to the back supporting piece again to enable the back supporting piece to continuously lean backwards, and when the back thrust is not applied any more, the user continues to be in a natural lying state at the current position;

when the user needs to lean forward, both legs of the user apply downward force to the foot rest to enable the foot rest to turn backwards and downwards, the sitting support piece descends and the back support piece leans forward under the linkage action of the third link mechanism, the second link mechanism and the first link mechanism, when the desired forward tilting angle is reached, the downward force is not applied to the foot rest any more, at the moment, the gravity applied to the sitting support piece and the foot rest by the user and the reverse reset force conducted to the back support piece by the sitting support piece through the first link mechanism achieve force balance, and the user is in a natural lying state.

By the method, a user can sit or lie naturally at any position between the initial folding position and the final unfolding position of the leisure chair.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, 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 of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a multi-functional leisure chaise longue frame construction which characterized in that: comprises a back support piece, a seat support piece, a foot rest and a support seat; a first connecting rod mechanism and a tilting rod which can enable the back support piece to be linked with the seat support piece when the back support piece tilts up are arranged between the rear end of the seat support piece and the back support piece as well as between the rear end of the seat support piece and the supporting seat; the sitting support piece is arranged above the supporting seat, the sitting support piece is obliquely arranged relative to the horizontal plane, the front end of the sitting support piece is higher than the rear end of the sitting support piece, and a second connecting rod mechanism which enables the sitting support piece to be lifted relative to the supporting seat is arranged between the sitting support piece and the supporting seat; one end of the tilting rod is hinged to the first connecting rod mechanism or the back support piece, and the other end of the tilting rod is hinged to the supporting seat; the footrest is hinged at the front end of the sitting support piece, and a third connecting rod mechanism which is linked with the sitting support piece when the footrest is unfolded or folded through overturning is also arranged among the sitting support piece, the footrest and the supporting seat; when the leisure chair frame bears a user and the back support piece is pushed by the user to tilt backwards, the seat support piece is synchronously lifted around the support seat under the supporting action of the tilting rod and the linkage action of the first link mechanism, and the foot rest is forwards overturned around the seat support piece under the linkage action of the third link mechanism; when the movement of the back support stops, the back support, the seat support and the foot rest are kept relatively fixed in a force balance state; when the leg rest bears the downward-pressing thrust, the back support piece, the sitting support piece and the leg rest are kept relatively fixed in the same force balance state.

2. The frame structure of a multifunctional leisure chair according to claim 1, characterized in that: the first connecting rod mechanism comprises a first guide rod and a second guide rod, a rotating support part is arranged at the lower end of the back support part, two ends of the first guide rod and the second guide rod are respectively hinged with the rotating support part and the seat support part, and a four-connecting-rod mechanism is formed among the rotating support part, the first guide rod, the second guide rod and the seat support part; during the tilting process of the back support piece, the first connecting rod mechanism deforms and drives the seat support piece to move forwards and downwards or upwards and backwards.

3. The frame structure of a multifunctional leisure chair according to claim 2, characterized in that: rotating side rods are arranged on two sides of the rotating supporting part in a mirror image mode; the supporting seat comprises supporting side plates arranged at two sides in a mirror image manner; two ends of the warping rod are respectively hinged to the rotating side plate and the supporting side plate; and the hinge point of the warping rod on the rotating side plate is positioned between the first guide rod and the second guide rod.

4. The frame structure of a multifunctional leisure chair according to claim 2, characterized in that: one end of the tilting rod is hinged on the supporting seat, and the other end of the tilting rod is hinged on any one of the first guide rod, the second guide rod or the back support piece.

5. The frame structure of a multifunctional leisure chair according to claim 3 characterized in that: the rotating side plate extends downwards and forwards to the lower part of the sitting support piece so as to be staggered with the sitting support piece, and the back support piece moves downwards synchronously when bending backwards.

6. The frame structure of a multifunctional leisure chair according to claim 1, characterized in that: the second connecting rod mechanism comprises a first rocker and a second rocker, two ends of the first rocker are respectively hinged with the front part of the sitting support piece and the front part of the supporting seat, and two ends of the second rocker are respectively hinged with the rear part of the sitting support piece and the rear part of the supporting seat; a four-bar linkage is formed among the first rocker, the second rocker, the seat support piece and the support seat; in the process that the sitting support piece is lifted relative to the supporting seat, the second connecting rod mechanism is linked to realize the upwarping and the integral backward movement of the front end of the sitting support piece.

7. The frame structure of a multifunctional leisure chair according to claim 6, characterized in that: the third connecting rod mechanism comprises a third rocker, two ends of the third rocker are respectively hinged with the foot rest and the supporting seat, the rear end of the foot rest is hinged with the front end of the seat supporting piece, the hinged position of the third rocker and the foot rest is staggered with the hinged position of the foot rest and the seat supporting piece, and the hinged position of the third rocker and the supporting seat is staggered with the hinged position of the first rocker and the supporting seat; a five-bar linkage mechanism is formed among the seat supporting piece, the first rocking bar, the supporting seat, the third rocking bar and the foot rest.

8. The frame structure of a multifunctional leisure chair according to claim 1, characterized in that: the frame structure of the leisure chair also comprises an elastic part for applying damping when the back support part, the seat support part and the foot rest are linked.

9. The frame structure of a multifunctional leisure chair according to claim 8, characterized in that: the elastic piece is an air spring, one end of the air spring is hinged with the supporting seat, and the other end of the air spring is hinged with any one of the foot rest, the seat supporting frame or the back supporting piece.

10. The frame structure of a multifunctional leisure chair according to claim 1, characterized in that: the back support piece and the seat support piece are both in frame type structures.

11. The frame structure of a multifunctional leisure chair according to claim 1, characterized in that: the footrest comprises a first footrest and a second footrest which are in sliding fit, and the first footrest is rotationally connected with the front end of the sitting support; and in the rotating process of the first foot rest around the seat supporting piece, the second foot rest slides along the first foot rest to expand and contract under the action of the telescopic mechanism.

12. The frame structure of a multifunctional leisure chair according to claim 11, characterized in that: the telescopic mechanism comprises a universal joint connecting rod, a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod are in running fit; the first connecting rod and the first footrest, and the second connecting rod and the second footrest are in running fit respectively; the two ends of the universal joint connecting rod are respectively connected to the first connecting rod and the seat supporting piece, and the universal joint connecting rod and the first connecting rod and the universal joint connecting rod and the seat supporting piece are respectively in rotating and swinging fit.