WO2022000968A1

WO2022000968A1 - Multifunctional leisure chair frame structure, and supporting sitting method therefor

Info

Publication number: WO2022000968A1
Application number: PCT/CN2020/131958
Authority: WO
Inventors: 陈永春; 黄忠良; 陆成龙; 李文才; 李立波
Original assignee: 永艺家具股份有限公司
Priority date: 2020-07-02
Filing date: 2020-11-26
Publication date: 2022-01-06
Also published as: CN214631129U; CN113768305A; CN214631100U; CN113768305B

Abstract

Disclosed are a multifunctional leisure chair frame structure and a supporting seating method therefor, the frame structure comprising a back support (3), a seat support (1), a foot rest (4) and a support base (2). A first connection rod mechanism (37) and a warping rod (42) are arranged between a rear end of the seat support (1), and the back support (3) and the support base (2); a second connection rod mechanism (9) is arranged between the seat support (1) and the support base (2); and a third connection rod mechanism (17) is further arranged between the seat support (1), the foot rest (4) and the support base (2). When the back support (3) is pushed to lean backwards, the seat support (1) is lifted up around the support base (2) under the supporting action of the warping rod (42) and linkage action of the first connection rod mechanism (37), and the foot rest (4) is turned forwards under the linkage action of the third connection rod mechanism (17); when the back support (3) stops moving, the back support (3), the seat support (1) and the foot rest (4) are kept fixed relative to one another in a force balance state; and when the foot rest (4) bears a downward pressing force and is then folded in a reverse direction, the seat support (1) descends and drives the back support (3) to incline forwards, and when the foot rest (4) stops moving, the back support (3), the seat support (1) and the foot rest (4) are also kept fixed relative to one another.

Description

Multifunctional leisure chair frame structure and its supporting and sitting method

technical field

The invention relates to the field of seating tools, in particular to a frame structure of a multifunctional leisure chair and a method for supporting and sitting.

Background technique

Nowadays, as consumers have higher and higher functional demands for seating equipment, the market for multifunctional leisure chairs has developed rapidly in recent years. From the earliest multi-functional leisure chair with the most simple technology, to the new multi-functional leisure chair that pays attention to ergonomics; from the very beginning, the multi-functional leisure chair will lose support for the user's waist when the user is tilted up, that is, we The so-called "running waist" has developed to the current "seat-back linkage technology", which can make the user's buttocks and the seat surface relatively fixed during the tilting process, eliminating the feeling of rubbing the back; there are also multi-functional leisure chairs. A footrest component is added, so that when the user is lying down, the footrest can be extended, and the whole body can be supported, which further improves the comfort of the multi-functional leisure chair. These all reflect that while people enjoy the relaxing posture provided by the multifunctional leisure chair, the requirements for the multifunctional leisure chair are gradually increasing.

At present, the frame structure of most of the multifunctional leisure chairs on the market usually only has two basic positions: the standard folded position and the reclined position. In the folded position, the seat is basically in a horizontal position, and the backrest is set to be substantially upright for normal sitting; in the unfolded position, the backrest is leaned back, and the backrest and the seat form an obtuse angle for rest or sleep; leisure chair use It can only be switched between these two positions, which makes the lounge chair cramped and cannot stay at any position between the folded position or the unfolded position; for this reason, the usual practice is to place a drive motor inside the lounge chair , the driving force is provided by the driving motor, so that the leisure chair can be locked and stopped at any position; although the electric drive device has the advantages of convenient operation and quick adjustment, but the motor is installed in the multi-functional leisure chair, which makes it expensive and difficult to maintain. It cannot be widely promoted and applied; therefore, how to realize the user's use of the leisure chair through its own frame structure, the leisure chair can adjust the user's gravity and stay between the folded position and the unfolded position, has become a constant pursuit of many furniture manufacturers to develop and improve. direction.

technical solutions

In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a multifunctional leisure chair frame structure with simple operation, good stability and user engineering. , you can realize the smooth transformation of the leisure chair from sitting, leisure to lying posture, and meet various requirements such as sitting, leisure, sleep, etc. Under the linkage action of the first link mechanism, the sitting support is lifted synchronously around the support base, and under the linkage action of the third link mechanism, the footrest is turned forward around the sitting support; When the angle of elevation and the back thrust is no longer applied, at this time, the gravity exerted by the user on the seat support and the footrest and the reverse reset force transmitted from the seat support to the back support through the first link mechanism reach a force balance , the user is in a natural lying state; the user can sit or lie down naturally at any position between the initial position of the leisure chair and the final position of the back; the structure is ingenious, through the link of the leisure chair itself Mechanism is realized, no need to set electric device.

Still further, the present invention provides a method for supporting and sitting on the frame structure of the leisure chair.

The technical scheme of the present invention is realized as follows:

A multifunctional leisure chair frame structure includes a back support, a sitting support, a footrest and a support seat; between the rear end of the sitting support, the back support and the support seat, a back support is arranged between the back support and the support seat. A first link mechanism and a tilting rod that can be linked with the seat support when tilting; the seat support is installed above the support seat, the seat support is inclined relative to the horizontal plane, and the front end of the seat support is high and the rear end is low , and a second link mechanism is arranged between the seat support and the support seat to enable the seat support to be lifted relative to the support seat; one end of the tilting rod is hinged on the first link mechanism or the back support, and the tilting rod The other end of the rod is hinged on the support seat; the footrest is hingedly arranged at the front end of the seat support, and between the seat support, the footrest and the support seat, a footrest is also arranged to be turned over by the footrest A third link mechanism that is linked with the seat support when unfolding or folding; when the lounge chair frame carries the user and the back support is pushed back by the user, the support of the tilting rod and the first link Under the linkage action of the mechanism, the seat support is lifted synchronously around the support seat, and under the linkage action of the third link mechanism, the footrest is turned forward around the seat support; when the movement of the back support stops, the back support , The sitting support and the footrest are relatively fixed in a state of force balance; when the footrest is subjected to the downward thrust, the retraction movement is reversed, and the sitting support falls and drives the back support to tilt forward. When the movement of the frame stops, the back support, the seat support and the footrest also remain relatively fixed in a state of force balance.

In the frame structure of the multifunctional leisure chair of the present invention, a first link mechanism and a second link mechanism are respectively arranged between the seat support member and the back support member, and between the seat support member and the support seat, and the first link mechanism is realized by a tilting rod. 1. The linkage of the second link mechanism; and a third link mechanism is arranged between the front end of the sitting support and the footrest. When the sitting support moves, the third link mechanism controls the footrest to flip forward and unfold; Then, when the lounge chair is in use, the user only needs to apply a back thrust to the back support to make the lounge chair expand; apply a downward thrust to the footrest to make the lounge chair reversely retract; the operation experience feel better.

Preferably, the first link mechanism includes a first guide rod and a second guide rod, a rotating support part is provided at the lower end of the back support, and the first guide rod and the second guide rod are respectively The two ends are respectively hinged with the rotating support part and the seat support part, and a four-link mechanism is formed between the rotation support part, the first guide rod, the second guide rod and the seat support part; during the tilting process of the back support part, the first A link mechanism deforms and drives the seat support to move forward and downward or upward and backward.

Preferably, the two sides of the rotating support part are provided with rotating side bars in mirror images; the support base includes support side plates arranged in mirror images on both sides; and the hinge point of the tilting rod on the rotating side plate is located between the first and second guide rods. The linkage between the back support and the seat support is realized through the supporting action of the rocking rod. When the user uses the leisure chair to lean back, the back support is tilted back; the first connecting rod mechanism drives the rocking rod to make it go around the supporting side The hinge point on the board rotates; the rocking rod provides a reverse support force during the movement of the back support during the rotation process, and the reverse support force is transmitted to the seat support through the first link mechanism, so that the The seat support moves accordingly.

Preferably, one end of the rocking rod is hinged on the support base, and the other end of the rocking rod is hinged on any one of the first guide rod, the second guide rod or the back support. In addition to being hinged on the rotating side plate, the other end of the rocking rod can also be hinged on other links of the first link mechanism.

Preferably, the rotating side plate extends downward and forward to the bottom of the seat support member so as to be staggered with the seat support member, and the back support member moves downward synchronously when the back support member is reclined. When the back support is reclined, the feeling of rubbing the back can be eliminated by the motion of rotating the side plate.

Preferably, the second link mechanism includes a first rocker and a second rocker, two ends of the first rocker are hinged with the front part of the seat support and the front part of the support seat, respectively. The two ends of the second rocker are respectively hinged with the rear of the seat support and the rear of the support seat; a four-bar linkage mechanism is formed between the first rocker, the second rocker, the seat support and the support seat; the seat support is relatively supported During the lifting process of the seat, the second link mechanism is linked to realize the upturning of the front end of the seat support and the overall rearward movement. The upturned front end and the overall rearward movement of the seat support member make the length of the footrest located below the seat support member correspondingly lengthened, so that the user's feet can be placed more comfortably.

Preferably, the third link mechanism includes a third rocker, two ends of the third rocker are respectively hinged with the footrest and the support seat, the rear end of the footrest is hinged with the front end of the seat support, and the third The hinged position of the rocker and the footrest is staggered from the hinged position of the footrest and the sitting support, and the hinged position of the third rocker and the support seat is staggered from the hinged position of the first rocker and the support seat; A five-link mechanism is formed between a rocker, the support base, the third rocker and the footrest. Both the third link mechanism and the second link mechanism include a first rocker, so that when the third link mechanism and the second link mechanism are deformed, the first rocker both participates in it, so that the third link mechanism and the second link mechanism are both involved. linkage between linkages.

Preferably, the leisure chair frame structure further includes an elastic member for applying damping when the back support member, the seat support member and the footrest are linked together. It enables the user to have a good sense of damping in the process of using the leisure chair.

Preferably, the elastic member is a gas spring, one end of the gas spring is hinged with the support seat, and the other end of the gas spring is hinged with any one of the footrest, the seat support frame or the back support.

Preferably, the gas spring is a constant force gas spring. The constant force gas spring always provides a fixed elastic force in the process of changing the state of the lounge chair, so that the lounge chair maintains a stable damping feeling during the process of unfolding to folding.

Preferably, the back support member and the seat support member are both frame-type structures. The back support is the back support of the leisure chair, and the seat support is the sitting support of the leisure chair.

Preferably, the footrest includes first and second footrests that are slidably fitted, and the first footrest is rotatably connected to the front end of the sitting support; A telescopic mechanism is arranged therebetween. During the rotation of the first footrest around the seat support, the second footrest slides to expand and contract along the first footrest under the action of the telescopic mechanism. By arranging a telescopic mechanism, when the first footrest rotates around the sitting support, the second footrest is unfolded or retracted, so that the flipping and unfolding of the footrest can be performed at the same time.

Preferably, the telescopic mechanism includes 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 rotational cooperation; The connecting rod and the first footrest and between the second connecting rod and the second footrest are respectively rotatably matched; the two ends of the universal joint connecting rod are respectively connected to the first connecting rod and the sitting support. , and between the universal joint connecting rod and the first connecting rod, and between the universal joint connecting rod and the seat support member, respectively, are rotating and swinging cooperation. By arranging the universal joint connecting rod, the universal joint connecting rod, the first connecting rod and the seat support member can better perform multi-angle rotation within a certain range.

Preferably, the support base includes a support bottom plate and support side plates connected to both sides of the support bottom plate, and the support side plates are formed by extending obliquely forward and upward along both sides of the support bottom plate.

Preferably, it also includes an armrest assembly and a chair foot support assembly; the support base is connected and fixed on the upper end of the chair foot support assembly, and the armrest assembly is connected and fixed on the left and right sides of the support base respectively.

A method for supporting and sitting based on the frame structure of the multifunctional leisure chair, the details are as follows:

The leisure chair has a starting position and a final position of reclining. In the initial position, the footrest is in a folded state, the sitting support is close to the support seat, and the back support is approaching the upright state; in the final position of reclining, The footrest is in a fully extended open state, the sitting support is far away from the support base and the back support is reclined to the maximum position;

The user sits on the leisure chair, and when it is necessary to lie down, the back push is applied to the back support through the back to make the back support lean back, and at the same time, under the action of the first, second, and third link mechanisms, the user sits The support is lifted and the footrest is turned forward and upward to lift the legs. When the desired back angle is reached, no back thrust is applied. At this time, the user's gravity on the sitting support and the footrest The force balance is achieved with the reverse reset force transmitted from the sitting support to the back support through the first link mechanism, and the user is in a state of natural lying;

When it is necessary to lie down at a larger angle, the user applies a back thrust to the back support again, so that the back support continues to lean back, and when the back thrust is no longer applied, the user continues to lie naturally at the current position;

When it is necessary to lean forward, the user's legs exert downward pressure on the footrest, so that the footrest is turned backward and downward. Under the linkage action of the third link mechanism, the second link mechanism and the first link mechanism The seat support is lowered and the back support is tilted forward. When the desired forward inclination angle is reached, no downward pressure is applied to the footrest. At this time, the same weight is exerted by the user on the seat support and the footrest. The force balance is achieved with the reverse restoring force transmitted from the sitting support to the back support through the first link mechanism, and the user is in a natural lying state.

Through the above method, the user can sit or lie down naturally at any position between the initial position and the final position of the reclining chair.

beneficial effect

1. The frame structure of the multifunctional leisure chair of the present invention can realize the three parts of the back support, the seat support and the footrest through the linkage of the first, second and third link mechanisms and the support of the tilting rod. Linkage relationship; that is, when the user exerts a back thrust on the back support, the seat support can be lifted synchronously around the support seat, and the footrest will also turn forward around the seat support, so that the lounge chair is unfolded; when the lounge chair needs to be folded When returning, just apply downward thrust to the footrest, and the leisure chair will move in the direction of retraction; the ingenious structure can bring users a good sense of operation experience.

2. In addition, when the user uses the lounge chair; when the back support is at a certain backward angle, the user no longer applies the back thrust; The chair has a tendency to be folded, and the user exerts the gravity of the rear end of the sitting support to make the leisure chair have a tendency to expand; the above two trends form an antagonistic relationship, so that the back support, the sitting support and the footrest form a force. Balanced and kept relatively fixed; the user can be in a natural lying state; the same is true for the back support at other reclining angles; so that the lounge chair can also be between the initial folded position and the final reclined position stop anywhere.

3. Equipped with a constant force gas spring, so that when the leisure chair is tilted, the gas spring is stretched, and the damping provided by the gas spring enables the leisure chair to run orderly and smoothly from the folded position to the unfolded position; The chair has a good sense of damping when in use, and at the same time, when the user leaves the lounge chair, the gas spring provides a restoring force, so that the footrest can be reset independently, making the user feel more comfortable; further, the existence of the gas spring will avoid The situation in which the lounge chair is randomly triggered when it is empty.

4. The movement of the back support, seat support and footrest on the leisure chair adopts the four-link movement independent of each other, so that during the use of the leisure chair, most of the force points do not interfere and run. Stable, improving the reliability and service life of the product.

5. The present invention realizes the upturning of the front end of the sitting support and the overall rearward movement and the forward turning of the footrest through the joint action of the second connecting rod and the third connecting rod when the user leans; The length of the footrest connected to the sitting support can be designed to be longer, and if the footrest is long enough, the footrest will not wipe the bottom of the footrest or the floor during the extension of the footrest; The whole support will move backwards, which reduces the occupation of the front space, does not interfere with the furniture or objects in front, and makes the design more humanized.

6. When the user is lying back, the back support is tilted backward, and the deformation of the first link makes the back support move forward relative to the sitting support while the back support is tilted backward; so that the back support always fits the user, Eliminate the "back rubbing feeling" when the user leans back, which is in line with user engineering.

7. The structure of the present invention is simple and ingenious. The four-link mechanism is used to realize linkage between the seat support and the footrest, between the back support and the seat support, and between the seat support and the support seat, and the structure is simple and effective. Obviously, the leisure chair can stay at any position during use without the driving force provided by electric devices such as electric push rods, and only needs to be controlled by the user itself, which saves production and processing costs; it can be widely applied to leisure chairs.

Description of drawings

FIG. 1 is a three-dimensional schematic diagram of the lower side of the leisure chair in a folded position in an embodiment of the present invention;

FIG. 2 is a schematic three-dimensional structure diagram of the top of the leisure chair in the folded position in the embodiment of the present invention;

3 is a schematic three-dimensional structural diagram of the lower side of the leisure chair in a folded position in an embodiment of the present invention;

3 is a schematic three-dimensional structural diagram of the lower bottom of the leisure chair in the folded position in the embodiment of the present invention;

5 is a schematic three-dimensional structural diagram of the connection between the back support and the seat support in an embodiment of the present invention;

6 is a schematic three-dimensional structural diagram of the first link mechanism in the folded position of the leisure chair according to the embodiment of the present invention;

7 is a schematic three-dimensional structural diagram of the first link mechanism in the unfolded position of the leisure chair according to the embodiment of the present invention;

8 is a schematic three-dimensional structural diagram of the second link mechanism in the folded position of the leisure chair according to the embodiment of the present invention;

9 is a schematic three-dimensional structural diagram of the second link mechanism in the unfolded position of the leisure chair in the embodiment of the present invention;

10 is a schematic three-dimensional structural diagram of the connection between the sitting support and the footrest in the embodiment of the present invention;

Figure 11 is an enlarged view of part A in Figure 10;

12 is a schematic diagram of the top three-dimensional structure of the leisure chair in the deployed position of the embodiment of the present invention;

Fig. 13 is a three-dimensional structural schematic diagram of the connection relationship between the first and second footrests and the telescopic mechanism in the embodiment of the present invention;

14 is a schematic three-dimensional structural diagram of a telescopic mechanism on a footrest in an embodiment of the present invention;

15 is a schematic three-dimensional structure diagram of a back support member and a rotating support portion in an embodiment of the invention;

FIG. 16 is an enlarged view of part B in FIG. 15 .

The reference numerals are: seat support 1; support base 2; support bottom plate 2a; support side plate 2b; mounting hole 2c; chair foot assembly a; vertical support rod b; back support 3; footrest 4; A footrest 5a; the second footrest 5b; the front cross bar 6a; the rear cross bar 6b; the left longitudinal bar 7a; the right longitudinal bar 7b; ; second rocker 11; limit pin 12; first footrest 13; connecting vertical plate 14; rotating connecting plate 15; third rocker 16; plate 19; sliding mechanism 20; guide rail 2a; slider 20b; telescopic mechanism 21; universal joint link 22; first link 23; second link 24; upper link 24a; lower link 24b; 24c; ball joint 25; mounting plate 26; rotating support part 28; supporting cross bar 28a; rotating side bar 28b; connecting frame 29; ; Installation back plate 33a; Installation side plate 33b; Folding plate 34; Clamping frame 35; Clamping plate 36; plate 41; tilting rod 42; gas spring 43; first connecting lug 44a; second connecting lug 44b;

Embodiments of the present invention

As shown in Figures 1-16, the present invention provides a frame structure of a multifunctional leisure chair, including a seat support 1, a support seat 2, a back support 3, a footrest 4 and a chair foot assembly a. The support The seat 2 is connected and fixed on the upper end of the chair foot assembly a.

As shown in Figures 2-5, the support base 2 includes a support bottom plate 2a and a support side plate 2b, and the support side plate 2b is formed by extending diagonally forward and upward along both sides of the support bottom plate 2a, so A mounting hole 2c is provided at the middle position of the support base plate 2a, and a vertical support rod b is provided at the middle position of the chair foot assembly a. The vertical support rod b can be an air rod. The support base plate 2a and the chair foot The component a is rotated and plugged through the mounting hole 2c.

As shown in Figures 1-4 and 8-9, the seat support 1 is located above the support seat 2, the seat support 1 is inclined relative to the horizontal plane, and the front end of the seat support is high and the rear end is low, and the seat support 1 is A "mouth"-shaped frame, the seat support 1 includes front and rear cross bars 6a, 6b, left and right vertical bars 7a, 7b and connecting vertical bars 8, and the connecting vertical bars 8 are located on the left and right Between the longitudinal rods 7a, 7b, and the two ends of the connecting longitudinal rod 8 are respectively connected and fixed on the front and rear cross rods 6a, 6b; A second link mechanism 9 is arranged therebetween; the second link mechanism 9 includes a first rocker 10 and a second rocker 11 , and the first rocker 10 is arranged on the front part and the support side of the sitting support 1 between the front ends of the plate 2b, and the two ends of the first rocker 10 are hinged with the connecting longitudinal rod 8 on the seat support 1 and the support side plate 2b respectively; the second rocker 11 is provided at the rear of the seat support 1 between the rear end position of the support side plate 2b, and the two ends of the second rocker 11 are also hinged with the connecting longitudinal rod 8 on the seat support 1 and the support side plate 2b; this makes the first rocker 10. A four-link mechanism is formed between the second rocker 11, the seat support 1 and the support base 2, that is, the second link mechanism 9 is a four-link mechanism; the seat support 1 can pass through the The second link mechanism 9 is lifted backward relative to the support base 2. Specifically, the leisure chair has a folded position and an unfolded position. In the folded position, as shown in FIG. 8, the first rocker 10, the first rocker The two rockers 11 are inclined forward, and the forward tilt angle of the first rocker 10 is greater than the forward tilt angle of the second rocker 11 ; in the unfolded position, as shown in FIG. 9 , the second link mechanism 9 is deformed , so that both the first rocker 10 and the second rocker 11 are rotated to incline toward the rear; the seat support 1 is tilted relative to the front end of the support base 2 and moves backward as a whole; Correspondingly, there is a limit pin 12 , when the first rocker 10 and the second rocker 11 rotate backward to contact with the limit pin 12 ; the seat support 1 moves backward to the maximum distance.

As shown in Figures 1-4 and 10-13, the footrest 4 includes a first footrest 5a and a second footrest 5b, and the first footrest 5a includes a first footrest 13 and a second footrest 5b. The connecting vertical plates 14 are respectively connected to the left and right sides of the first footrest 13. The connecting vertical plates 14 are sheet metal parts, which have high strength and are economical. There is a rotating connecting plate 15, and the connecting vertical plate 14 and the rotating connecting plate 15 are hinged, so that the first footrest 5a can be turned around the front end of the support member 1; the connecting vertical plate 14 is also connected with the support A third rocker 16 is connected between the front part of the side plate 2b, the upper end of the third rocker 16 is hinged with the connecting vertical plate 14, and the hinge position of the third rocker 16 and the connecting vertical plate 14 is located in the connecting vertical plate 14 and the rotational connection position of the rotating connection plate 15; the lower end of the third rocker 16 is hinged with the supporting side plate 2b, and the hinged position is located before the hinged position of the first rocker 10 and the supporting side plate 2b; A third link mechanism 17 is formed between the first rocker 10, the seat support 1, the third rocker 16, the first footrest 5a and the support base 2, and the third link mechanism 17 is a five-link Lever mechanism; the third link mechanism 17 also includes the first rocker 10 , so that there is a linkage relationship between the second link mechanism 9 and the third link mechanism 17 .

As shown in Figures 13 and 14, the second footrest 5b is stacked on the first footrest 5a, the second footrest 5b includes a second footrest 18, and the second footrest 5b includes a second footrest 18. A pair of supporting vertical plates 19 arranged at intervals are provided on both sides of the foot plate 18; the second foot rest 5b and the first foot rest 5a are slidably matched by a sliding mechanism 20, specifically: the sliding mechanism 20 includes a guide rail 20a and a slider 20b, the guide rail 20a is connected and fixed on the connecting vertical plate 14, the guide rail 28 is made of plastic material, which can reduce the production cost, the slider 20b is a long strip, the slider 20b is fixed on both sides below the second footrest 18, and the slider 20b is clamped and fixed between the two supporting vertical plates 19. The supporting vertical plate 19 provides a lateral support force to the slider 20b, so that the second footrest 5b can be stably extended and retracted along the first footrest 5a.

A telescopic mechanism 21 is further provided below the sitting support 1, the first footrest 5a and the second footrest 5b, and the telescopic mechanism 21 can control the sliding and telescoping of the second footrest 5b. The telescopic mechanism 21 includes 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 rotational cooperation, and the first connecting rod 23 and the second connecting rod 24 The first link 23 and the first footrest 5a and the second link 24 and the second footrest 5b are in rotational fit. Specifically, the first footrest 5a includes a front and a rear. Two first footrests 13 arranged at intervals, the first link 23 is located below the front first footrest 13, and the middle of the first link 23 is rotatably connected with the front first footrest 13; the The second connecting rod 24 includes an upper connecting rod 24a and a lower connecting rod 24b that are staggered in height. The upper and lower connecting rods 24a and 24b are connected by a connecting inclined rod 24c, and the upper connecting rod 24a is rotatably connected to the second connecting rod. At the middle position of the front end of the footrest 18 , the lower link 24b and the first link 23 are in the same horizontal plane, and the rear end of the lower link 24b is rotatably connected with the front end of the first link 23 . The two ends of the universal joint connecting rod 22 are respectively connected to the first connecting rod 23 and the front cross bar 6a of the sitting support. Both ends of the universal joint connecting rod 22 are ball joints 25. The front end of the connecting rod 22 and the rear end of the first connecting rod 23 are rotated and swayed, and a downward mounting plate 26 is provided on the front cross bar 6a of the seat support. The mounting plate 26 is rotated and rocked to fit.

It can be seen from the above that 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, the second link When the rod mechanism 9 and the third link mechanism 17 are deformed, the first rocker 10 is involved, so that the deformation between the second link mechanism 9 and the third link mechanism 17 is linked. Specifically: when all the When the seat support 1 is forced backwards relative to the support base 2 through the second link mechanism 9, the seat support 1 moves backward, and the upper ends of the first rocker 10 and the second rocker 11 are both around the support side. The plate 2b is rotated backwards to the pull-up position, and the first rocker 10 is pulled up, so that the front end of the seat support 1 is lifted up; The deformation of the third link mechanism 17 enables the seat support 1 to drive the first footrest 5a to flip forward at the same time. Specifically, because the seat support 1 , the first rocker 10 , the third rocker 16 and the A five-link mechanism is formed between the first footrest 5a and the support base 2. When the front end of the sitting support 1 is lifted and moved backward, the upper end of the first rocker 10 rotates backward, and the vertical rod 8 is connected to the sitting support. The rotating connecting plate 15 at the front end will pull the first footrest 5a backward, and the third rocker 16 rotates backward at the same time around its hinge point with the supporting side plate 2b, thereby driving the first footrest 5a to sit on the support 1 At the same time, when the first footrest 5a is turned forward, the universal joint connecting rod 22 is rotated forward around the mounting plate 26, and the connecting end of the universal joint connecting rod 22 and the first connecting rod 23 The first link 23 is pulled back to make the first link 23 rotate around its hinge point with the front first footrest 13, the first link 23 rotates and drives the second link 24 to rotate, and the second link 24 rotates The second footrest 5b is urged to slide and unfold along the first footrest 5a; when the first and second rockers 10 and 11 are rotated to abut against the limit pins, the front end of the seat support 1 is lifted to the maximum Height, the first link 23 and the second link 24 are in the same straight line state, the first footrest 5a is turned forward to the maximum angle relative to the sitting support 1, and the second footrest 5b is opposite to the first footrest 5a Slide out completely.

Through the linkage between the second link mechanism 9 and the third link mechanism 17, during the use of the lounge chair, the seat support 1 is forced to make the front end tilt up and move backward as a whole, and the first The footrest 5a can form a linkage with the seat support 1, the first footrest 5a is turned forward at the same time, and due to the turning of the first footrest 5a, the telescopic mechanism 21 simultaneously controls the second footrest 5b along the The first footrest 5a slides and unfolds; the opening and closing of the footrest 4 can be completed only by controlling the movement of the seat support 1, and the operation is convenient; , the front end of the sitting support 1 will be upturned and raised to a certain height, so that it can be ensured that when the footrest 4 is designed to be long enough, the footrest 4 will not wipe the feet or the floor during the extension process; After the footrest 4 is flipped and unfolded, the seat support 1 will move backward as a whole, which can reduce the occupation of the front space when the footrest is extended, and avoid interference with the furniture. The overall design is very reasonable and user-friendly.

As shown in Figures 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 a frame structure, and the lower end of the back support 3 is provided with The rotating support portion 28, the back support member 3 is connected and fixed on the rotating support portion 28; the rotating support portion 28 includes a support cross bar 28a and a rotating side bar 28b respectively connected to both sides of the support cross bar 28a, The rotating side bar 28b is formed to extend obliquely forward and downward along both sides of the support cross bar 28a, and the middle position of the lower end of the back support 3 has a downwardly protruding "mouth"-shaped connecting frame. 29. The connecting frame 29 is connected and fixed on the support cross bar 28a. The specific connection means: the connecting frame 29 includes left and right connecting rods 30 and 31 and a lower cross bar 32. A mounting seat 33 is correspondingly disposed in the middle position of the 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 to the support cross plate. At the middle position of the rod 28a, the end of the mounting side plate 33b away from the support cross bar 28a extends along the inner direction to a folded plate 34 that can cover the connecting frame 29, and is located between the left and right links 30, 31. There are clamping frames 35 respectively on the upper and lower sides of the clamping frame 35, and clamping plates 36 are arranged at the front and rear of the clamping frame 35 to clamp the front and rear ends of the left and right connecting rods 30 and 31. When installing, the clamping frame 35 is first The left and right connecting rods 30 and 31 are installed and fixed on the left and right connecting rods 30 and 31, and then the connecting frame 29 is placed in the mounting seat 33, and is connected and fixed with the mounting back plate 33a by bolts.

As shown in FIGS. 1-7 , a first link mechanism 37 is provided between the back support member 3 and the seat support member 1 , and the first link mechanism 37 includes a first guide rod 38 and a second guide rod The rod 39, the two ends of the first and second guide rods 38, 39 are respectively hinged with the rotating side rod 28b and the connecting longitudinal rod 8, specifically: the connecting longitudinal rod 8 is provided with a vertical The downward connecting plate 40, the connecting plate 40 is fixed on the rear end of the connecting longitudinal rod 8 through screw connection; the front end of the connecting plate 40 extends downwardly with a hinged vertical plate 41, and during installation, the The lower end of the first guide rod 38 is hinged with the front end of the rotating side rod 28b, 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 supporting side plate 38b, and the second guide rod The upper end of 39 is hinged with the rear end of the connecting plate 40, and the second guide rod 39 is also provided with a limit pin 12, the limit pin 12 abuts with the rotating side rod 28b to limit the back support 3 to sit on the support 1 A four-bar linkage is formed between the first guide rod 38, the second guide rod 39, the seat support 1 and the rotation support part 28 on the back support, that is, the first connecting rod The mechanism 37 is a four-link mechanism; the back support 3 can be tilted relative to the sitting support 1 through the deformation of the first link mechanism 37 .

As shown in Figure 1-3, when the user is in a normal sitting position, that is, the lounge chair is in the folded position, the back support 3 is close to the upright state of the backrest, and the lower ends of the first and second guide rods 38 and 39 are inclined Towards the rear, and the inclination angle of the second guide rod 39 is larger; when the user is leaning backward, a backward back push is applied to the back support 3, and the back support 3 is forced to incline backward, so that the rotating support Forward movement; the rotating side rod 28b on the rotating support part 28 and the first link mechanism 37 formed between the first and second guide rods 32, 33 and the seat support 1 are deformed, and the rotating side rod 28b is directed toward The forward movement causes the lower ends of the first and second guide rods 32 and 33 to rotate forward around the connecting plate 40; during this process, the back support 3 connected to the rotating support 28 is tilted backward, and the back support 3 and the seat support The angle between the parts 1 increases, and at the same time, the height of the lower end of the back support 3 decreases and the back support 3 moves forward relative to the sitting support 1, so that the back support 3 can actively reduce the height and Move forward to fit the user, eliminate the "back rubbing feeling", and make the user feel more comfortable; when the back support 3 is tilted back to the fully extended position of the lounge chair, as shown in Figures 3 and 7, the first and second The lower ends of the two guide rods 32, 33 are driven by the rotating side rod 28b to rotate forward around the first and second connecting vertical plates 36a, 36b to a maximum angle, at this time, the distance between the back support 3 and the seat support 1 reaches the maximum limit angle.

As shown in FIGS. 1-7 , a tilting bar 42 is further provided between the rotating side bar 28b and the supporting side plate 2b on the support base 2 , and the tilting bar 42 can realize the backward tilting and sitting of the back support 3 The supporting member 1 is lifted synchronously; specifically, one end of the tilting rod 42 is hinged on the rotating side rod 28b, and the hinge point of the tilting rod 42 is located at the hinge point of the first guide rod 38 and the rotating side rod 28b, the second Between the two guide rods 39 and the hinge point of the rotating side rod 28b; the other end of the tilt rod 42 is hinged on the supporting side rod 2b; as shown in Figures 6-7, when the user uses the leisure chair to lie back When the back support 3 is rotated backward by the leaning force of the user, the first link mechanism 37 is deformed; the rotating support 28 at the lower end of the back support 3 rotates forward and moves downward; the rotating support 28 drives the The tilting rod 42 makes the tilting rod 42 rotate backward around the supporting side plate 2b; the tilting rod 42 provides a reverse supporting force during the movement of the rotating support part 28 during the rotation process, and the reverse supporting force passes through the first A link mechanism 37 is transmitted to the seat support member 1, so that the seat support member 1 has a tendency to lift relative to the support base 2, and then the second link mechanism 9 is correspondingly deformed, and the front end of the seat support member 1 is lifted and moved backward as a whole At the same time, the third link mechanism 17 is deformed, and the footrest 4 is turned forward and unfolded; that is, under the support of the tilting rod 42, the first link mechanism 37 and the second link mechanism 9 are synchronously deformed to achieve back When the support member 3 is tilted backward, the seat support member 1 is simultaneously lifted backward; and during the movement of the seat support member 1, the third link mechanism 17 is driven to deform, and the footrest 4 is also synchronously flipped forward and opened; finally The linkage between the seat, back and footrest of the leisure chair is realized, so that the user only needs to lean back and apply force to the back support 3 during use, and then the leisure chair can be smoothly changed from sitting, leisure to lying posture. ; And when the leisure chair needs to be restored again, it is enough to apply a downward thrust to the footrest 4; the operation is convenient, and it can meet various requirements such as sitting posture, leisure, sleep, etc.; it is convenient to use, and the body feels better. And the movement of the back support 3, the movement of the sitting support 1 and the movement of the footrest 4 all adopt the independent four-link movement, so that the leisure chair runs smoothly during use, and there is no interference between each force point. The smooth operation improves the reliability and service life of the product; in turn, the unnecessary waste of the product is reduced.

A more important design is: through the design of the above-mentioned link mechanism, when the user uses the lounge chair, the lounge chair can be between its folded position (ie the starting position) and the unfolded position (ie the final position of reclining back). The user can sit or lie down naturally in this position, and the leisure chair will not shake. Specifically: when the leisure chair is in the initial folded position, if the user's back is not in contact with the back support, the user's gravity acts downward on the seat support 3, and since the seat support 3 is inclined at the initial position and is in contact with the support seat 2 It remains relatively fixed. At this time, the leisure chair will not change and can be used by the user in a normal sitting posture. When the user needs to lie down, the back actively leans back against the back support member 3, so that the back support member 3 is leaned back, and at the same time, the sitting support member 1 is lifted and the footrest 4 is turned forward to turn the legs Open; when the back support 3 reaches the leaning angle desired by the user, the user no longer applies a back thrust to the back support 3 deliberately, and the movement of the back support 3 stops. At this time, the user's own gravity is exerted on the lounge chair, and the back The support member 3, the sitting support member 1 and the footrest 4 will be in a state of force balance, so that the lounge chair can stay in this position and the user is in a natural lying state; specifically: at this time, The user is lying on the lounge chair, the sitting support 1 is in a raised state, and the user's gravity on the front end of the sitting support 1 and the footrest 4 makes the lounge chair tend to fold; The gravity on the back support 3 makes the lounge chair tend to keep unfolding; the two resist each other and the force is balanced, so that the user can make the lounge chair back to the desired back angle when using the lounge chair, which is more humane to use change; more comfort.

As shown in Figures 1-4 and 12, armrest frames 45 are respectively provided on the supporting side plates 2b on both sides. When the user uses the leisure chair, his hands can rest on the armrest frames 45; 45 is easier to lean back, and is more convenient to use; between the seat support 1 and the support seat 2, there is also a back support 3, seat support 1 and footrest 4 when the three are linked together. The elastic member for applying damping, the elastic member is a gas spring 43, specifically: the front crossbar 6a and the mounting back plate 44a on the seat support member 1 are correspondingly provided with first connecting ears 44a and second connecting ears 44a. Connecting lugs 44b, the first connecting lugs 44a face downwards and the upper ends of the first connecting lugs 44a are connected and fixed on the front crossbar 6a, the second connecting lugs 44b are facing downwards and the bottoms of the second connecting lugs 44b are connected and fixed On the mounting back plate 44a, the head of the gas spring 43 is hinged with the first connecting ear 44a, and the tail of the gas spring 43 is hinged with the second connecting ear 44b; and the gas spring 43 is a constant force gas spring , During the unfolding process of the lounge chair, the gas spring 43 is stretched to provide the elastic force for the reset of the seat support 1, so that the user can feel a good sense of damping adjustment when using it; and when the lounge chair is reset, it can assist the user to reduce stress The force of the footrest 4; in addition, the elastic force provided by the constant force gas spring 43 is always fixed, so that the lounge chair can provide the same damping effect in any position during use, and can run more smoothly; the user feels better good.

To sum up, when the frame structure of the multifunctional leisure chair is used, the supporting and sitting methods are as follows:

The user sits on the leisure chair, and when it is necessary to lie down, the back pushes the back support to make the back support lean back, and at the same time, under the action of the first, second and third link mechanisms, the back supports the back support. The legs are lifted up and the footrest is turned forward and upward to lift the legs. When the desired back angle is reached, the back thrust is no longer applied. At this time, the user's gravity on the seat support and the footrest is different from The reverse restoring force transmitted from the seat support to the back support through the first link mechanism achieves force balance, and the user can lie down naturally.

Through the above method, the user can sit or lie down naturally at any position between the initial folded position of the leisure chair and the final unfolded position of the reclining chair.

Claims

A frame structure of a multifunctional leisure chair is characterized in that: it includes a back support, a sitting support, a footrest and a support seat; A first link mechanism and a tilting rod that can be linked with the seat support when the back support is tilted; the seat support is installed above the support seat, the seat support is inclined relative to the horizontal plane, and the front end of the seat support The rear end is high and the rear end is low, and a second link mechanism is arranged between the seat support and the support seat to enable the seat support to be lifted relative to the support seat; one end of the tilting rod is hinged to the first link mechanism or the back support The other end of the tilting rod is hinged on the support seat; the footrest is hingedly arranged at the front end of the seat support, and there is also a seat between the seat support, the footrest and the support seat. When the tripod is unfolded or folded by flipping, the third link mechanism is linked with the seat support; when the leisure chair frame carries the user and the back support is pushed back by the user, the support and Under the linkage action of the first link mechanism, the seat support is lifted synchronously around the support base, and under the linkage action of the third link mechanism, the footrest is turned forward around the seat support; when the movement of the back support stops , the back support, the seat support and the footrest are relatively fixed in a state of force balance; when the footrest is subjected to the downward thrust, the retraction motion is reversed, and the seat support falls and drives the back support forward. , when the motion of the footrest stops, the back support, the seat support and the footrest also remain relatively fixed in a state of force balance.
The frame structure of the multifunctional leisure chair according to claim 1, wherein the first link mechanism comprises a first guide rod and a second guide rod, and a rotating support part is provided at the lower end of the back support member , the two ends of the first guide rod and the second guide rod are respectively hinged with the rotation support part and the seat support part, and the rotation support part, the first guide rod, the second guide rod and the seat support part are hinged A four-link mechanism is formed; during the tilting process of the back support, the first link mechanism is deformed and drives the seat support to move forward and downward or upward and backward.
The frame structure of the multifunctional leisure chair according to claim 2, characterized in that: the two sides of the rotating support part are provided with rotating side bars in mirror images; Both ends of the rocking rod are hinged on the rotating side plate and the supporting side plate respectively; and the hinge point of the rocking rod on the rotating side plate is located between the first and second guide rods.
The frame structure of the multifunctional leisure chair according to claim 2, wherein one end of the rocking rod is hinged on the support seat, and the other end of the rocking rod is hinged on the first guide rod, the second guide rod or the back support. on any one.
The frame structure of the multifunctional leisure chair according to claim 3, wherein the rotating side plate extends downwards and forwards to the bottom of the seat support so as to be staggered with the seat support, and the back support is synchronous when the back support is tilted back. downward movement.
The frame structure of the multifunctional leisure chair according to claim 1, wherein the second link mechanism comprises a first rocker and a second rocker, and two ends of the first rocker are respectively connected with the seat. The front part of the support piece and the front part of the support seat are hinged, and the two ends of the second rocker are respectively hinged with the rear part of the seat support part and the rear part of the support seat; the first rocker, the second rocker, the seat support and A four-bar linkage mechanism is formed between the support bases; during the lifting process of the sitting support piece relative to the support base, the second link mechanism is linked to realize the upturning of the front end of the sitting support piece and the overall rearward movement.
The frame structure of the multifunctional leisure chair according to claim 6, wherein the third link mechanism comprises a third rocker, and the two ends of the third rocker are respectively hinged with the footrest and the support seat. , the rear end of the footrest is hinged with the front end of the seat support, the hinge position of the third rocker and the footrest is staggered from the hinge position of the footrest and the seat support, and the hinge position of the third rocker and the support seat is the same as that of the first The hinged positions of the rocker and the support base are staggered; a five-link mechanism is formed between the sitting support, the first rocker, the support base, the third rocker and the footrest.
The frame structure of the multifunctional leisure chair according to claim 1 is characterized in that: the frame structure of the leisure chair further comprises an elastic member for applying damping when the back support member, the seat support member and the footrest are linked together.
The frame structure of the multifunctional leisure chair according to claim 8, wherein the elastic member is a gas spring, one end of the gas spring is hinged with the support seat, and the other end of the gas spring is connected with the footrest, seat Either the support frame or the back support is hinged.
The frame structure of the multifunctional leisure chair according to claim 9, wherein the gas spring is a constant force gas spring.
The frame structure of the multifunctional leisure chair according to claim 1, wherein the back support and the seat support are both frame structures.
The frame structure of the multifunctional leisure chair according to claim 1, wherein the footrest comprises first and second footrests that are slidably matched, and the first footrest is connected to the front end of the sitting support. Rotational connection; a telescopic mechanism is arranged between the first and second footrests, and during the rotation of the first footrest around the seat support, the second footrest moves along the first footrest under the action of the telescopic mechanism The tripod slides to expand and contract.
The frame structure of the multifunctional leisure chair according to claim 12, wherein the telescopic mechanism comprises a universal joint link, a first link and a second link, and the first link is connected with the second link. The two connecting rods are rotatably matched; and the first connecting rod and the first footrest, the second connecting rod and the second footrest are respectively rotatable; the universal joint is connected The two ends of the rod are respectively connected to the first connecting rod and the seat support, and the universal joint connecting rod and the first connecting rod and between the universal joint connecting rod and the seat support are rotated and rocked respectively.
The frame structure of the multifunctional leisure chair according to claim 1, wherein the support base comprises a support base plate and a support side plate connected to both sides of the support base plate, and the support side plates are along the two sides of the support base plate. It is formed by extending diagonally forward and upward.
The frame structure of the multifunctional leisure chair according to claim 1, further comprising an armrest assembly and a chair leg support assembly; the support base is connected and fixed on the upper end of the chair leg support assembly, and the armrest assemblies are respectively connected to Fixed on the left and right sides of the support base.
A method of supporting and sitting based on the frame structure of the multifunctional leisure chair according to claim 1, characterized in that the method is as follows:

The leisure chair has a starting position and a final position of reclining. In the initial position, the footrest is in a folded state, the sitting support is close to the support seat, and the back support is approaching the upright state; in the final position of reclining, The footrest is in a fully extended open state, the sitting support is far away from the support base and the back support is reclined to the maximum position;

The user sits on the leisure chair, and when it is necessary to lie down, the back push is applied to the back support through the back to make the back support lean back, and at the same time, under the action of the first, second, and third link mechanisms, the user sits The support is lifted and the footrest is turned forward and upward to lift the legs. When the desired back angle is reached, no back thrust is applied. At this time, the user's gravity on the sitting support and the footrest The force balance is achieved with the reverse reset force transmitted from the sitting support to the back support through the first link mechanism, and the user is in a state of natural lying;

When it is necessary to lie down at a larger angle, the user applies a back thrust to the back support again, so that the back support continues to lean back. When the back thrust is no longer applied, the user continues to lie down naturally at the current position;

When it is necessary to lean forward, the user's legs exert downward pressure on the footrest, so that the footrest is turned backward and downward. Under the linkage action of the third link mechanism, the second link mechanism and the first link mechanism The seat support is lowered and the back support is tilted forward. When the desired forward inclination angle is reached, no downward pressure is applied to the footrest. At this time, the same weight is exerted by the user on the seat support and the footrest. The force balance is achieved with the reverse restoring force transmitted from the sitting support to the back support through the first link mechanism, and the user is in a natural lying state.