CN105193119A - Sofa bracing structure - Google Patents

Abstract

A sofa bracing structure comprises the structures such as a switching mechanism, a first linkage mechanism and a second linkage mechanism, wherein the switching mechanism comprises a transitional cross rod and a transitional connecting part; the first linkage mechanism comprises a first crank rod, a straight rod and a second crank rod; the second linkage mechanism comprises a footrest fixing part, a backrest fixing part, a hand rail side plate fixing part, a locking mechanism and a transmission part. The technical scheme has the characteristics of simple structure and high use comfort level.

Description

A sofa support structure

technical field

The invention relates to a sofa structure, in particular to a liftable sofa support structure.

Background technique

With the improvement of people's living standards, consumers have put forward new requirements for the functionality of the sofa, such as the need to have functions such as a sofa when folded and a recliner when unfolded, and the convenience of getting up and standing.

In order to achieve the above-mentioned technical purpose (need), in the patent literature of the invention patent CN201310104494.3, a technical solution of an electric folding bed chair is disclosed, including: electric push-pull rod group, three-link connecting piece, front pedal adjustment group, backrest The adjustment group and the base frame adjustment group are hinged to each other, and the connecting main shaft is driven to the east by the electric push-pull rod group. The connecting main shaft drives the backrest to unfold or fold through the joint connecting piece, and the movement of the connecting main shaft drives the three-link connecting piece to do front and rear. Movement, the three-linkage connecting piece drives the front pedal to unfold or fold through the front pedal adjustment group, the telescopic movement of the telescopic tube, the unfolding and folding movement of the front pedal, and the unfolding and folding movement of the backrest are all carried out at the same time, which can be completed quickly. The support mechanism described in this technical solution preliminarily realizes the function of unfolding the bed and chair into a bed, folding into a chair and its function switching. When the bed chair is unfolded, there will be a sudden feeling of leaning down, which greatly reduces the comfort of the product; at the same time, all structures are fixed on the base, which puts forward higher requirements for the stability of the base structure, making the base structure complex.

In order to overcome the above-mentioned technical problems, the patent document of the invention patent CN201310526632.7 discloses a technical solution of an elderly chair, including: a base support mechanism, a footrest mechanism, a backrest mechanism, a connecting rod mechanism, an electric push rod and a seat lift Mechanism, the seat plate lifting mechanism is riveted with the base support mechanism, and the footrest mechanism, backrest mechanism and connecting rod mechanism are all arranged on the seat plate lifting mechanism; the functions of lifting the footrest and lying down with the backrest can be realized. However, in actual use, the supine action only occurs on the footrest mechanism and the backrest mechanism, and the user needs to adjust to the supine state without changing the sitting posture, which greatly reduces the comfort of the product; at the same time, the air rod The movement of the backrest and the footrest is transmitted to the backrest mechanism and the footrest mechanism through the rotation of a three-link, so the movement of the backrest and the footrest still starts synchronously, and only because the lengths of the two connecting rods produce different angular velocities of movement, the lifting of the footrest Cooperate with the reclining speed of the backrest; the last technical solution is similar, so the structures are fixed on the base, and the two movements are driven by the two structures to separate the two movements of the air rod, so the base structure is more complicated , high requirements on the stability of the base structure.

Contents of the invention

The present invention aims to solve the above-mentioned technical problems, thereby providing a sofa support mechanism with simple structure, the backrest and the footrest are unfolded sequentially and smoothly, and the use comfort is high.

The technical scheme that the present invention solves the above problems is as follows:

A sofa support structure, including a base, a sofa support, an air rod, a conversion mechanism, a first linkage mechanism and a second linkage mechanism, an armrest side panel, a backrest and a seat frame, and a planar four-bar linkage mechanism is used between the base and the sofa support connection; the rear part of the base is provided with an air rod joint, which is used to fix the lower end of the air rod; the sofa bracket includes a front U-shaped rod, a rear U-shaped rod, a sofa armrest side panel installation part and an air rod connection part, and the air rod is connected The part is set in the middle of the front U-shaped bar;

Conversion mechanism, including transition cross bar and transition connection part;

The first linkage mechanism, driven by the conversion mechanism, adjusts the linkage between the seat frame and the backrest, including a first crank rod, a straight rod and a second crank rod; one end of the first crank rod is fixedly connected to the end of the transition cross bar part, the second crank rod is fixedly arranged on the seat frame;

The second linkage mechanism, driven by the first linkage mechanism, adjusts the linkage between the footrest and the backrest, including the footrest fixing part, the backrest fixing part, the armrest side panel fixing part, the locking mechanism and the transmission part. The fixed part is used to drive the movement of the footrest; the fixed part of the backrest is fixedly arranged on the backrest for driving the movement of the backrest; the fixed part of the backrest is connected with the connection point of the straight rod and the second crank rod, and is used for the second linkage mechanism The movement of the armrest provides a first fulcrum and a driving point; the armrest side plate fixing part is fixedly arranged on the armrest side plate, and is used to provide a second fulcrum for the movement of the second linkage mechanism;

The connecting portion of the gas rod is hinged to the transition connecting portion, and the transition connecting portion is used to connect the upper end of the gas rod;

The transition connection part is fixedly arranged on the transition cross bar, and has an upper joint position and a lower joint position; the upper joint position connects the upper end of the air rod and serves as the rotation axis of the air rod, and the lower joint position connects with the front U through the air rod connection part. The bar is connected and used as the rotation axis of the transition bar relative to the front U-bar;

The locking mechanism has a locking groove for cooperating with the locking pin arranged on the fixed part of the armrest side plate and restricting the extension and retraction movement of the transmission part;

The transmission part is used to transmit the motion to the footrest fixing part, the backrest fixing part and the armrest board fixing part.

From this preferred technical solution, it can be seen that the planar link mechanism, as the executive mechanism of the supine action, is fixedly arranged on the armrests on both sides, thus simplifying the base structure and reducing the requirements for the strength of the base structure.

As a preference of the above technical solution, the transmission part includes a first short rod, a first connecting rod group, three connecting rods, a folding rod, a second short rod, a second connecting rod group, and a third connecting rod group.

As a preference of the above technical solution, the first short rod is connected head to tail with the pin of the first connecting rod group; the first end of the three connecting rods is connected with the pin of the first connecting rod group, and the second end is connected with the The joint is pin-connected, and the third end is pin-connected to the proximal end of the folding rod; one end of the folding rod is pin-connected to the end of the first connecting rod group; the second connecting rod group is pin-connected to the third connecting rod group.

As a preference of the above technical solution, the locking mechanism is a triangular planar metal structure.

As a preference of the above technical solution, the curved shape of the first crank rod is the same as the movement track of the transition cross bar when the planar four-bar linkage mechanism works.

As a preference of the above technical solution, both ends of the straight rod have a first connecting portion and a second connecting portion; the first connecting portion is connected to the first crank rod; the second connecting portion is connected to the second The crank rod is connected; the planes formed by the connecting surfaces of the first connecting part and the second connecting part are parallel and have a distance, so that there is a distance between the first crank rod and the second crank rod.

As a preference of the above technical solution, the backrest fixing part is connected to the transmission part through a pin connection with the folding rod and the second short rod.

As a preference of the above technical solution, the proximal end of the armrest side plate fixing part is connected to the transmission part through a pin connection with the second short rod.

As a preference of the above technical solution, the locking mechanism is connected to the transmission part through a pin connection with the second link group and a pin connection with the proximal end of the folding rod.

As a preference of the above technical solution, the extension part of the planar four-bar linkage mechanism is fixedly welded on the front U-shaped metal rod, and the front U-shaped metal rod is embedded in the extension part of the planar four-bar linkage mechanism.

It is not difficult to see from the above technical solution that the supine support mechanism of this technical solution is divided into two stages when performing the supine action: the seat board and the backrest of the sofa or bed chair in the first stage move backward, accompanied by a slight downward tilt, The footrest extends upward; the seat and back of the second-stage sofa or daybed tilt downward, with a slight rearward movement, and the footrest moves downward and fully extends. This process makes the footrest of the sofa unfold before the backrest, and the seat board and the backrest move synchronously, so that the user will not have the feeling of lying on his back suddenly, which improves the comfort.

In summary, the present invention has the following beneficial effects:

1. The structure is simple, the main executive mechanism of the supine movement - the second linkage mechanism is fixed on the armrest boards on both sides; at the same time, the lifting and supine actions are separated through the setting of the first linkage mechanism, so that the two They do not interfere with each other; therefore, the structure of the base is simplified, the two can be produced separately, and the requirements for machining accuracy are simplified during processing.

2. The use comfort is high, the backrest and the footrest are unfolded smoothly one after another, and the seat board and the backrest move synchronously; the user first sinks and then moves, lifts the feet, and then leans back, the transition between the processes is smooth, and the process steps meet the comfort requirements.

Description of drawings

Fig. 1 is the schematic diagram of sofa bracket and first linkage mechanism of embodiment 1 of the present invention;

2 is a schematic diagram of a second linkage mechanism in Embodiment 1 of the present invention;

Fig. 3 is a schematic diagram of the connection between the sofa bracket and the seat frame in Embodiment 1 of the present invention;

Fig. 4 is a schematic diagram of the connection and position of the second linkage mechanism, armrest side panel and backrest in Embodiment 1 of the present invention;

Fig. 5 is a schematic diagram of the connections and positions of the base, the sofa bracket, the first linkage mechanism, the second linkage mechanism, the armrest side panel, the backrest and the seat frame in Embodiment 1 of the present invention;

In the figure, 1- base, 2- sofa support, 4- conversion mechanism, 5- first linkage mechanism, 6- second linkage mechanism, 7- armrest side panel, 8- backrest, 9- seat frame, 11- gas Rod junction, 21-front U-shaped metal rod, 22-rear U-shaped metal rod, 23-sofa armrest side panel installation part, 24-air rod connection part, 41-transition cross bar, 42-transition connection part, 51- First crank rod, 52-straight rod, 53-second crank rod, 61-footrest fixing part, 62-backrest fixing part, 63-armrest side panel fixing part, 64-locking mechanism, 65-transmission part, 421 -upper joint position, 422-lower joint position, 521-first connecting part, 522-second connecting part, 641-locking groove, 651-first short rod, 652-second connecting rod group, 653-three links Rod, 654-folding rod, 655-the second short rod, 656-the second connecting rod group, 657-the third connecting rod group.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

The following specific embodiments are only an explanation of the present invention, not a limitation of the present invention. Any modifications made by those skilled in the art after reading the description of the present invention, as long as they are within the scope of the claims, will be subject to the patent law. Protect.

Embodiment 1: a sofa support structure as shown in Figure 1, including a base 1, a sofa support 2, an air rod (not shown in the figure), a conversion mechanism 4, a first linkage mechanism 5 and a second linkage mechanism 6, The armrest side panel 7, the backrest 8 and the seat panel frame 9, the base 1 and the sofa support 2 are connected by a planar four-bar linkage mechanism; the rear part of the base 1 is provided with an air rod joint 11 for fixing the lower end of the air rod 3 The sofa bracket 2 includes a front U-shaped bar 21, a rear U-shaped bar 22, a sofa armrest side panel installation part 23 and an air bar connecting part 24, and the air bar connecting part 24 is arranged in the middle part of the front U-shaped bar 21; The rod mechanism is fixedly welded on the front U-shaped metal rod 21 through its extension part, and the front U-shaped metal rod 21 is embedded in the extension part of the plane four-bar linkage mechanism.

The conversion mechanism 4 includes a transition bar 41 and a transition connection part 42 .

The first linkage mechanism 5, under the drive of the conversion mechanism 4, adjusts the linkage between the seat frame 9 and the backrest 8, including a first crank rod 51, a straight rod 52 and a second crank rod 53; the first crank rod 51 One end is fixedly connected to the end of the transition cross bar 41 , and the curved shape is the same as the movement track of the transition cross bar 41 when the planar four-bar linkage mechanism works. The second crank rod 53 is fixedly arranged on the seat frame 9 . Both ends of the straight rod 52 have a first connecting portion 521 and a second connecting portion 522; the first connecting portion is connected to the first crank rod 51; the second connecting portion 522 is connected to the second crank rod 53 connection; the planes formed by the connecting surfaces of the first connecting part 521 and the second connecting part 522 are parallel and have a distance, so that the first crank rod 51 and the second crank rod 53 There is spacing.

The second linkage mechanism 6, driven by the first linkage mechanism 5, adjusts the linkage between the footrest and the backrest 9, including the footrest fixing part 61, the backrest fixing part 62, the armrest side plate fixing part 63, the locking mechanism 64 and the transmission part 65, the footrest fixing part 61 is used to drive the footrest to move; the backrest fixing part 62 is fixedly arranged on the backrest 8, and is used to drive the backrest 8 to move; the backrest fixing part 62 is connected with the straight bar 52 and the second The connection point of the crank rod 53 is used to provide a first fulcrum and a driving point for the movement of the second linkage mechanism 6; The movement of 6 provides a second fulcrum.

The gas rod connecting portion 24 is hinged to the transition connecting portion 42 , and the transition connecting portion 42 is used to connect the upper end of the gas rod 3 .

The transition connection part 42 is fixedly arranged on the transition cross bar 41, and has an upper joint position 421 and a lower joint position 422; The air bar connection part 24 is connected with the front U-shaped bar 21 and serves as the rotation axis of the transition cross bar 41 relative to the front U-shaped bar 21 .

The backrest fixing part 62 is connected with the transmission part 65 through the pin connection with the folding rod 654 and the second short rod 655 .

The proximal end of the armrest side plate fixing portion 63 is connected to the transmission portion 65 through a pin connection with the second short rod 655 .

The locking mechanism 64 is a triangular planar metal structure, and has a locking groove 641 for cooperating with the locking pin 631 provided on the armrest side plate fixing part 63 and restricting the extension and retraction movement of the transmission part 65 . It is connected to the transmission part 65 through the pin connection with the second link group 656 and the pin connection with the proximal end of the folding rod 654 .

The transmission part 65 is used to transmit the movement to the footrest fixing part 61 , the backrest fixing part 62 and the armrest board fixing part 63 . The transmission part 65 includes a first short rod 651 , a first connecting rod group 652 , three connecting rods 653 , a folding rod 654 , a second short rod 655 , a second connecting rod group 656 and a third connecting rod group 657 . The first short rod 651 is pin-connected head to tail with the first link group 652; the first end of the three-link 653 is pin-connected with the first link group 652, and the second end is connected with the third link group 657 Pin connection, the third end is pin-connected with the proximal end of the folded rod 654; one end of the folded rod 654 is pin-connected with the end of the first connecting rod group 652; the second connecting rod group 656 is connected with the third connecting rod group 657 pin connection.

Embodiment 2: The difference between Embodiment 2 and Embodiment 1 is that the locking mechanism 64 is an oval planar metal structure.

Embodiment 3: The difference between Embodiment 3 and Embodiment 1 is that the locking mechanism 64 is an elliptical plane metal structure; the curved shape of the first crank rod is different from the motion trajectory of the transition cross bar 41 when the plane four-bar linkage mechanism works; The plane formed by the first connecting portion 521 is in close contact with the plane formed by the connecting surface of the second connecting portion 522 .

The working process of the three embodiments of the technical solution is as follows: the length of the air rod is the initial length when the sofa is not lifted or lying on its back by default, and the working state is divided into two stages. The front is low and the rear is high, so that the user can get up and stand up; stage II—the air rod 3 is retracted, the sofa footrest is opened, the backrest 8 and the seat frame 9 are tilted backward, and the user can lie on his back.

When working (the length of the air rod is set as the initial length when the sofa is not lying on its back), under the extension thrust of the air rod 3, the transition cross bar 41 rotates to the front U-shaped metal shaft with the pin on the transition joint 42 as the axis. above the rod 21, and transmit the thrust of the air rod 3 elongation to the front U-shaped metal rod 21, and the front U-shaped metal rod 21 has a tendency to move synchronously; the front U-shaped metal rod 21 is welded and embedded with the plane four-bar linkage mechanism In this way, its movement is limited by the planar four-bar linkage mechanism, and its motion trajectory is consistent with the front U-shaped metal rod 21; at this time, the sofa is raised as a whole, and is in a state of low front and high rear. Since the second linkage mechanism 6 is connected with the transition crossbar 41 through the first linkage mechanism 5, the movement of the transition crossbar 41 with the elongation of the air rod 3 does not affect the first linkage mechanism 5 and the second linkage mechanism 6. influence, thereby separating the two motion phases.

Under the pulling force of the air rod 3 contraction, the transition cross bar 41 transmits the motion to the first crank bar 51, and then the second crank bar 53 through the straight bar 52, thereby causing the sofa seat board to generate the main motion and motion of moving backward. Auxiliary movement in which the rear portion is inclined downward; since the first linkage mechanism 5 and the second linkage mechanism 6 are connected, the motion is transmitted to the second linkage mechanism 6 at the same time, and the two move synchronously, so that the backrest fixing part 62 is synchronously generated to move backward A primary movement and a secondary movement with the rear sloping down. With the movement of the backrest fixing part 62, the distance between the folding bar 654 and the second short bar 655 decreases, and the locking mechanism 64 is opened; through the conversion of the third link group 657, the backrest fixing part 62 is moved backward mainly The movement and the auxiliary movement of the rear portion tilting down become the main movement of the footrest fixing portion 61 unfolding and the auxiliary movement upward. At this time, the seat frame 9 moves steadily to the rear, the backrest 8 moves to the rear with a slight downward tilt, and the footrest is lifted upwards and launched.

As the air rod 3 continues to shrink, the transition bar 41 moves further backward, the locking mechanism 64 is further opened and flipped, and the folding rod 654 is lifted upwards, so that the distance between the folding rod 654 and the second short rod 655 is increased, thereby The backrest fixing part 62 is rotated. At this time, the backrest fixing part 62 produces a main movement of tilting down and an auxiliary movement of moving backward, and the seat frame 9 moves synchronously with the backrest 8; The rod set 657 is vertical, so that the motion of the footrest becomes the primary motion of unfolding and the secondary motion of downward. At this moment, the seat board is tilted down stably, the backrest 8 is tilted down accompanied by a slight backward movement, and the footrest fully unfolds.

Claims (10)

1. a sofa supporting construction, is comprised base (1), sofa bracket (2), gas bar (3), handrail side panel (7), backrest (8) and seat board frame (9), is connected between base (1) and sofa bracket (2) by lanar four rod mechanism; The rear portion of base (1) is provided with gas bar joint portion (11), for the lower end of fixed air bar (3); Sofa bracket (2) comprises front U-shaped bar (21), rear U-shaped bar (22), the gentle bar connecting portion (24) of sofa handrail side plate installation portion (23), and described gas bar connecting portion (24) is arranged on the middle part of front U-shaped bar (21); It is characterized in that: also comprise switching mechanism (4), the first link gear (5) and the second link gear (6);

Switching mechanism (4), comprises transition cross bar (41), transition connection portion (42);

First link gear (5), under the driving of switching mechanism (4), adjustment seat sheet frame (9) and the interlock of backrest (8), comprise the first toggle-action lever (51), straight-bar (52) and the second toggle-action lever (53); One end of described first toggle-action lever (51) is fixedly connected on transition cross bar (41) end, and described second toggle-action lever (53) is fixedly installed on seat board frame (9);

Second link gear (6), under the driving of the first link gear (5), regulate the interlock of toe board and backrest (9), comprise toe board fixed part (61), backrest fixed part (62), handrail side panel fixed part (63), locking mechanism (64) and driving section (65), described toe board fixed part (61) is moved for driving toe board; Described backrest fixed part (62) is fixedly installed on backrest (8), moves for driving backrest (8); Described backrest fixed part (62) is connected with the tie point of straight-bar (52) and the second toggle-action lever (53), for providing the first fulcrum and drive point for the motion of the second link gear (6); Described handrail side panel fixed part (63) is fixedly installed in handrail side panel (7), for providing the second fulcrum for the motion of the second link gear (6);

Described gas bar connecting portion (24) is hinged with described transition connection portion (42), and described transition connection portion (42) is for connecting the upper end of gas bar (3);

Described transition connection portion (42) is fixedly installed on transition cross bar (41), has upper bound site (421) and lower bound site (422); Upper bound site (421) connects the upper end of gas bar (3) and as the center of rotation of gas bar (3), lower bound site (422) to be connected with front U-shaped bar (21) by gas bar connecting portion (24) and as (21) center of rotation of the relative front U-shaped bar of transition cross bar (41);

Described locking mechanism (64), has and stretches out the sealed groove (641) with recovery movement for cooperatively interacting with the sealed pin (631) be arranged on handrail side panel fixed part (63) and limiting driving section (65);

Described driving section (65), for transferring the motion to toe board fixed part (61), backrest fixed part (62) and balustrade panel fixed part (63).

2. a kind of sofa supporting construction according to claim 1, is characterized in that: described driving section (65) comprise the first quarter butt (651), first connecting rod group (652), three connecting rods (653), pole (654), the second quarter butt (655), second connecting rod group (656), third connecting rod group (657).

3. a kind of sofa supporting construction according to claim 2, is characterized in that: described first quarter butt (651) head and the tail are sold with first connecting rod group (652) and are connected; Described three connecting rods (653) first end sell with first connecting rod group (652) be connected, the second end sell with the junction of third connecting rod group (657) be connected, the 3rd end is connected with the close end pin of pole (654); Described pole (654) one end is connected with first connecting rod group (652) end pins; Described second connecting rod group (656) is sold with third connecting rod group (657) and is connected.

4. a kind of sofa supporting construction according to claim 1, is characterized in that: described locking mechanism (64) is triangle projective planum metal structure.

5. a kind of sofa supporting construction according to claim 1, is characterized in that: when the curve shape of described first toggle-action lever (51) works with lanar four rod mechanism, the movement locus of transition cross bar (41) is identical.

6. a kind of sofa supporting construction according to claim 5, is characterized in that: described straight-bar (52) two ends have the first connecting portion (521) and the second connecting portion (522); Described first connecting portion is connected with described first toggle-action lever (51); Described second connecting portion (522) is connected with described second toggle-action lever (53); Parallel and there is spacing between the plane that the joint face of described first connecting portion (521) and described second connecting portion (522) is formed, make to there is spacing between described first toggle-action lever (51) and described second toggle-action lever (53).

7. a kind of sofa supporting construction according to claim 1, is characterized in that: described backrest fixed part (62) is connected with driving section (65) by being connected with the pin of pole (654), the second quarter butt (655).

8. a kind of sofa supporting construction according to claim 1, is characterized in that: the close end of described handrail side panel fixed part (63) is connected with driving section (65) by being connected with the pin of the second quarter butt (655).

9. a kind of sofa supporting construction according to claim 1, is characterized in that: described locking mechanism (64) is connected with driving section (65) by being connected with the pin of second connecting rod group (656) and being connected with the pin of pole (654) close end.

10. a kind of sofa supporting construction according to claim 1, it is characterized in that: described lanar four rod mechanism is fixedly welded on front U-shaped metallic rod (21) by its extension, and make in the extension of front U-shaped metallic rod (21) embedded plane quadric chain.