CN103584546B - Seat and backrest installation structure thereof - Google Patents

Abstract

The invention discloses a seat and a backrest installation structure thereof. The backrest installation structure includes a base, and the left and right sides of the base are respectively provided with left and right opposite cushion connecting frames, a connecting rod G, a connecting rod H, a connecting rod I, and a connecting rod J, connecting rod K and backrest connecting piece; cushion connecting frame, connecting rod J, connecting rod K and backrest connecting piece constitute a four-bar linkage mechanism, the middle of connecting rod K or connecting rod J is hinged with one end of connecting rod I, and connecting rod The other end of I is hinged with the upper end of connecting rod H, the middle of connecting rod H is hinged with the upper rear part of the cushion connecting frame, the lower end of connecting rod H is hinged with one end of connecting rod G, and the other end of connecting rod G is hinged with the base; The upper ends of the two backrest connectors are fixedly installed with a backrest, and the backrest is fixedly installed on the backrest, and the seat cushion connecting frame is driven by a driving device to move back and forth. The technical solution improves the structure of the mechanical linkage, reduces the complexity of the system, improves the stability of the movement, and improves the comfort of use, and is convenient to use, reasonable in structure, and saves space.

Description

Seat and its back installation structure

technical field

The invention belongs to the field of furniture, in particular to a seat such as a recliner, a sofa, etc., and in particular to a backrest installation structure used therein.

Background technique

Traditionally, furniture such as lounge chairs, sofas, etc. will be installed with an actuating mechanism - a functional frame, on which a chair frame composed of a backrest, a seat cushion, and a leg rest is installed, and the functional frame is used to realize the movement of the chair frame and the motionless The interconnection between the base components. The functional frame is usually a combination of various mechanical linkages that are operable to provide various comfort features, such as independent reclining movement of the seat assembly, and actuation of the extendable leg rest assembly and associated tipping of the chair frame. While many conventional recliners operate satisfactorily, furniture manufacturers are continually pursuing improved chair frames and functional frames that reduce system complexity, improve smooth operation, and occupant comfort. In addition, there is a continuing desire to develop improved manufacturing and assembly techniques that will result in cost reductions while promoting increased efficiency and improved product quality.

Contents of the invention

In order to solve the above technical problems, one of the objects of the present invention is to provide a backrest installation structure, which improves the mechanical linkage structure, so as to reduce the complexity of the system, improve the stability of operation and the comfort of use.

The second object of the present invention is to provide a seat, including the above-mentioned backrest installation structure.

In order to achieve the above-mentioned purpose, the present invention has adopted following technical scheme:

A backrest installation structure, including a base, the left and right sides of the base are respectively provided with left and right opposite cushion connecting frames, connecting rods G, connecting rods H, connecting rods I, connecting rods J, connecting rods K and backrest connectors; The middle of the backrest connecting piece is hinged with the upper end of the connecting rod K, the lower end of the connecting rod K is hinged with the upper rear part of the cushion connecting frame, the lower end of the backrest connecting piece is hinged with the upper end of the connecting rod J, and the lower end of the connecting rod J is connected with the cushion connecting frame The upper rear part of the connecting rod is hinged, the middle of the connecting rod K or connecting rod J is hinged with one end of the connecting rod I, the other end of the connecting rod I is hinged with the upper end of the connecting rod H, and the middle of the connecting rod H is connected with the upper rear part of the cushion connecting frame Hinged, the lower end of the connecting rod H is hinged with one end of the connecting rod G, and the other end of the connecting rod G is hinged with the base, so that the cushion connecting frame, the connecting rod J, the connecting rod K and the backrest connector constitute a four-bar linkage; The upper ends of the two backrest connectors arranged oppositely on the left and right are fixedly installed with a backrest seat, and a backrest is fixedly installed on the backrest seat, and the cushion connecting frame is driven by a driving device to move back and forth.

Preferably, the hinge point of the connecting rod J and the cushion connecting frame is located in front of the hinge point of the connecting rod H and the cushion connecting frame, and the hinge point of the connecting rod H and the cushion connecting frame is located at the hinge point of the connecting rod K and the cushion connecting frame in front of. In this way, the structural design is more reasonable, simpler and more reliable.

As a preference, near the hinge point of the backrest connector and the connecting rod J, a backrest board capable of pushing the rear end of the seat cushion is installed, and the two ends of the backrest board are respectively fixedly connected to two backrest connectors or connecting rods J arranged opposite to the left and right. . A top waist plate is set on the jacking part of the four-bar linkage mechanism of the backrest, so that it can push up the rear end of the seat cushion when the backrest is lying down, so that the sponge at the rear end of the seat cushion is lifted appropriately, which greatly improves the use of the seat. comfort.

As preferably, the cushion connecting frame is provided with an elastic potential energy mechanism B that always gives the backrest connecting piece a tendency to approach the cushion connecting frame, so that the instability of the link mechanism can be reduced as much as possible, and the movement stability and reliability of the functional frame can be improved. performance, support strength and comfort of use. The elastic potential energy mechanism B can be an extension spring or other elastic components, preferably an extension spring. There are various arrangements of the extension spring. For example, one end of the extension spring is connected to the seat cushion connecting frame, and the other end of the extension spring is connected to the backrest connector.

As a preference, the lower front part of the cushion connecting frame is hinged with the lower end of the connecting rod E, the upper end of the connecting rod E is hinged with the front part of the base, the lower rear part of the cushion connecting frame is hinged with the lower end of the connecting rod F, and the connecting rod The upper end of F is hinged with the base rear portion, and like this, cushion connecting frame, connecting rod E, connecting rod F and base constitute four-bar linkage. In this way, the structural design is more reasonable, simpler and more reliable.

A connecting rod D is hinged on the upper front of the cushion connecting frame, and the two connecting rods D arranged opposite to each other are fixed and connected to rotate synchronously through the left and right connecting rods. The above-mentioned driving device can be any power mechanism that can directly or indirectly drive the connecting rod D to rotate back and forth , such as cylinders, motors, etc. Preferably, the driving device is a linear push rod motor, one end of the linear push rod motor is movably connected to the base, and the other end of the linear push rod motor is movably connected to the left and right connecting rods.

As a preference, a limiting structure A that limits the forward rotation range of the connecting rod D is provided between the cushion connecting frame and the connecting rod D, and a limiting structure A is provided between the cushion connecting frame and the base to limit the backward moving range of the cushion connecting frame. Limiting structure B.

The above-mentioned limiting structure A can be any structure that can directly or indirectly limit the forward rotation range of the connecting rod D, such as a limiting column, a stopper, etc., and preferably, the limiting structure A is fixed on the cushion connecting frame or the connecting rod D The limit column is simple and convenient, and the structure is stable. In addition, the limiting structure A is not limited to a rigid limiting structure, and can also be an elastic limiting structure, for example, a tension spring, and the two ends of the tension spring are respectively connected to the cushion connecting frame and the connecting rod D.

The above-mentioned limiting structure B can be any structure that can directly or indirectly limit the backward movement range of the cushion connecting frame, such as a limiting column, a stopper, etc. As a preference, the limiting structure B is fixed on the cushion connecting frame or the base The limit column is simple and convenient, and the structure is stable. In addition, the limiting structure B is not limited to a rigid limiting structure, and can also be an elastic limiting structure, for example, a tension spring, and the two ends of the tension spring are respectively connected to the cushion connecting frame and the base. It can also be an indirect position-limiting structure, for example, a position-limiting column is set on the cushion connecting frame to limit the connecting rod H so as to limit the backward movement range of the seat cushion connecting frame.

Preferably, the base is provided with an elastic potential energy mechanism A that always gives the cushion connecting frame a tendency to move backwards, so that the instability of the link mechanism can be reduced as much as possible, and the operational stability, reliability, and support of the functional frame can be improved. Strength and comfort of use. The elastic potential energy mechanism A can be an extension spring or other elastic components, preferably an extension spring. There are various arrangements of the extension spring, for example, one end of the extension spring is connected to the base, and the other end of the extension spring is connected to the connecting rod F.

A seat includes the above-mentioned backrest installation structure.

The present invention adopts the above technical scheme, improves the structure of the mechanical linkage, reduces the complexity of the system, improves the stability of the movement, and improves the comfort of use, and is convenient to use, reasonable in structure, and saves space.

Description of drawings

Fig. 1 is the structural representation (sitting state) of embodiment 1 seat;

Fig. 2 is a schematic structural view of the functional rack of Embodiment 1 (sitting state);

Fig. 3 is a schematic structural diagram of the functional frame of Embodiment 1 (the state where the leg rest is lifted);

Fig. 4 is a schematic structural diagram of the functional rack of Embodiment 1 (lying state);

Fig. 5 is a perspective view of the functional frame of Embodiment 1 (one side structure is omitted for easy distinction);

Fig. 6 is a perspective view of the functional frame of Embodiment 2 (one side structure is omitted for easy distinction).

detailed description

The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

Example 1:

A backrest installation structure as shown in Figure 1 includes a base 20, and the left and right sides of the base 20 are respectively provided with a left and right relative cushion connecting frame 12, a connecting rod G14, a connecting rod H15, a connecting rod I17, a connecting rod J16, and a connecting rod. Rod K18 and backrest connector 19; the middle of the backrest connector 19 is hinged to the upper end of the connecting rod K18, the lower end of the connecting rod K18 is hinged to the upper rear part of the cushion connecting frame 12, and the lower end of the backrest connector 19 is connected to the connecting rod J16 The upper end of the connecting rod J16 is hinged with the upper rear part of the cushion connecting frame 12, the middle of the connecting rod K18 or the connecting rod J16 is hinged with one end of the connecting rod I17, and the other end of the connecting rod I17 is hinged with the upper end of the connecting rod H15 , the middle of the connecting rod H15 is hinged with the top rear part of the cushion connecting frame 12, the lower end of the connecting rod H15 is hinged with one end of the connecting rod G14, and the other end of the connecting rod G14 is hinged with the base 20, like this, the cushion connecting frame 12, the connecting rod J16, connecting rod K18 and backrest connector 19 constitute a four-bar linkage mechanism; the upper ends of the two backrest connectors 19 oppositely arranged on the left and right are fixedly installed with a backrest 3, and the backrest 4 is fixedly installed on the backrest 3, and the seat cushion is connected The frame 12 is driven to move back and forth by a driving device.

A functional frame of a seat as shown in FIGS. C10, connecting rod D11, cushion connecting frame 12, connecting rod E9, connecting rod F13, connecting rod G14, connecting rod H15, connecting rod I17, connecting rod J16, connecting rod K18 and backrest connecting piece 19; legrest connecting piece 6 One end of the connecting rod A7 is hinged with one end of the connecting rod A7, the other end of the connecting rod A7 is hinged with one end of the connecting rod C10, the other end of the connecting rod C10 is hinged with the upper front part of the seat cushion connecting frame 12, and the other end of the legrest connector 6 It is hinged with one end of connecting rod B8, the other end of connecting rod B8 is hinged with one end of connecting rod D11, the other end of connecting rod D11 is hinged with the upper front part of cushion connecting frame 12, and connecting rod B8 and connecting rod C10 cross each other and The cross position is hinged, and like this, the legrest connector 6, the connecting rod A7, the connecting rod B8 and the connecting rod C10 constitute a four-bar linkage mechanism, and the connecting rod B8, the connecting rod C10, the connecting rod D11 and the cushion connecting frame 12 constitute a four-bar linkage Mechanism, the two connecting rods D11 that are arranged relatively left and right are fixedly connected to rotate synchronously through the left and right connecting rods 21, and a driving device drives the connecting rods D11 to rotate back and forth; the lower front part of the cushion connecting frame 12 is hinged with the lower end of the connecting rod E9, and is connected The upper end of the rod E9 is hinged with the front portion of the base 20, the lower rear portion of the cushion connecting frame 12 is hinged with the lower end of the connecting rod F13, and the upper end of the connecting rod F13 is hinged with the rear portion of the base 20. Like this, the cushion connecting frame 12, the connecting rod E9, the connecting rod F13 and the base 20 form a four-bar linkage mechanism; the middle of the backrest connector 19 is hinged with the upper end of the connecting rod K18, and the lower end of the connecting rod K18 is hinged with the upper rear part of the cushion connecting frame 12, and the backrest connector 19 The lower end of the connecting rod J16 is hinged with the upper end of the connecting rod J16, the lower end of the connecting rod J16 is hinged with the top rear part of the cushion connecting frame 12, the middle of the connecting rod K18 is hinged with one end of the connecting rod I17, and the other end of the connecting rod I17 is connected with the connecting rod H15. The upper end is hinged, the middle of the connecting rod H15 is hinged with the top rear part of the cushion connecting frame 12, the lower end of the connecting rod H15 is hinged with one end of the connecting rod G14, and the other end of the connecting rod G14 is hinged with the base 20, like this, the cushion connecting frame 12, Connecting rod J16, connecting rod K18 and backrest connector 19 constitute four-bar linkage, and cushion connecting frame 12, connecting rod H15, connecting rod I17 and connecting rod K18 constitute four-bar linkage; Wherein, described cushion connecting frame 12 and connecting rod A limiting structure A is provided between the rods D11 to limit the forward rotation range of the connecting rod D11 , and a limiting structure B is provided between the cushion connecting frame 12 and the base 20 to limit the backward moving range of the cushion connecting frame 12 .

In this embodiment, the driving device is a linear push rod motor 22 , one end of the linear push rod motor 22 is movably connected with the base 20 , and the other end of the linear push rod motor 22 is movably connected with the left and right connecting rods 21 . The limiting structure A is a limiting column fixed on the cushion connecting frame 12 or the connecting rod D11. The limiting structure B is a limiting column fixed on the cushion connecting frame 12 or the base 20 . The hinge point between the connecting rod C10 and the cushion connecting frame 12 is located in front of the hinge point between the connecting rod D11 and the cushion connecting frame 12 . The hinge point of the connecting rod J16 and the cushion connecting frame 12 is located in front of the hinge point of the connecting rod H15 and the cushion connecting frame 12, and the hinge point of the connecting rod H15 and the cushion connecting frame 12 is located at the hinge of the connecting rod K18 and the cushion connecting frame 12. point ahead. Near the hinge point of the backrest connecting piece 19 and the connecting rod J16, a top waist board (not shown in the figure) capable of pushing the rear end of the seat cushion 2 is installed. 19 or connecting rod J16 is fixedly connected. The base 20 is provided with an elastic potential energy mechanism A that always gives the cushion connecting frame 12 a tendency to move backward. The elastic potential energy mechanism A is a tension spring, one end of the tension spring is connected with the base 20, and the other end of the tension spring is connected with the connecting rod F9. The cushion connecting frame 12 is provided with an elastic potential energy mechanism B that always gives the backrest connecting piece 19 a tendency to approach the cushion connecting frame 12 . The elastic potential energy mechanism B is an extension spring, one end of the extension spring is connected with the seat cushion connecting frame 12 , and the other end of the extension spring is connected with the backrest connector 19 .

A kind of seat as shown in Figure 1, comprises the above-mentioned functional frame, described two seat cushion connecting frames 12 that are oppositely arranged on the left and right are fixedly installed cushion seat 1, and cushion seat 1 is fixedly installed seat cushion 2, described The upper ends of the two backrest connectors 19 arranged opposite to each other are fixedly installed with the backrest seat 3, and the backrest 4 is fixedly installed on the backrest seat 3, and the legrest board 5 is fixedly installed on the two left and right oppositely arranged legrest connectors 6. .

As shown in Figure 2, the functional frame is in the sitting state; when the linear push rod motor 22 pushes the two connecting rods D11 to rotate forward through the left and right connecting rods 21, the two four-bar linkages of the leg rest move until the leg rest When it reaches the lifted state, as shown in Figure 3, the connecting rod D11 is limited by the limit column so that it is integrated with the cushion connecting frame 12, so that the forward driving force of the linear push rod motor 22 is directly applied to the cushion connecting frame 12, the cushion connecting frame 12 is driven to move forward, and a four-bar linkage mechanism is formed between the cushion connecting frame 12 and the base 20, so that the cushion connecting frame 12 and its upper cushion are in a forward and upward swing lifting process. The connecting rod I17 hinged by the rod K18 is connected with the base 20 via the connecting rod H15 and the connecting rod G14, and the middle of the connecting rod H15 is hinged with the upper rear part of the cushion connecting frame 12, so, during the forward movement of the cushion connecting frame 12 , the four-bar linkage mechanism for installing the backrest at the back of the cushion connector 12 (the cushion connector 12, the connecting rod J16, the connecting rod K18 and the backrest connector 19 constitute the four-bar linkage) also changes, prompting the backrest to move forward and gradually Topple over until it is in a lying state, as shown in Figure 4. Otherwise, in the reset process of the linear push rod motor 22, the cushion connecting frame 12 moves successively, the backrest is erected gradually, and then the leg rest is put down.

Example 2:

As shown in Figure 6, a backrest installation structure differs from Embodiment 1 only in that the middle of the connecting rod J16 is hinged to one end of the connecting rod I17, the other end of the connecting rod I17 is hinged to the upper end of the connecting rod H15, and the connecting rod The middle of H15 is hinged with the top rear portion of cushion connecting frame 12, the lower end of connecting rod H15 is hinged with an end of connecting rod G14, and the other end of connecting rod G14 is hinged with base 20, like this, cushion connecting frame 12, connecting rod H15, connecting rod Rod I17 and connecting rod J16 constitute a four-bar linkage, and the others are the same as in Embodiment 1. Its action principle and process are also similar to Embodiment 1.

In the present invention, there is only one driving device providing power, and the leg rest is installed on two interconnected four-bar linkages, and the two four-bar linkages are driven by the power driving device to realize the leg rest in the lifted state. During the conversion process, the distance between the leg rest and the seat cushion changes very little, which prevents the leg rest from rubbing and pulling the trouser legs, and improves the comfort of use. When the leg rest is in the lifted state, the two four-bar linkages of the leg rest are connected to the cushion connecting frame through the limiting structure A, so that the forward driving force of the driving device is applied to the seat cushion connecting frame, Drive the cushion connecting frame to move forward, and a four-bar linkage mechanism is formed between the cushion connecting frame and the base, so that the cushion connecting frame and its upper cushion are in a forward and upward swing lifting process. The connecting rod I is connected to the base via the connecting rod H and the connecting rod G, and the middle of the connecting rod H is hinged with the upper rear part of the cushion connecting frame. Therefore, during the forward movement of the cushion connecting frame, the rear part of the cushion connecting frame The four-bar linkage mechanism (the seat cushion connecting frame, connecting rod J, connecting rod K and backrest connecting piece constitute the four-bar linkage mechanism) of the installed backrest also changes, prompting the backrest to move forward and gradually fall down, realizing the linkage between the seat cushion and the backrest , avoiding the rubbing and pulling of the clothes at the waist, improving the comfort of use, and the structure of this scheme also realizes leaning against the wall, that is, even when the seat is sitting upright, even if the seat is leaning against the wall, it can still directly realize the lying down action, while In the prior art, it is necessary to leave a certain distance between the backrest of the seat and the wall to implement the lying down action, so the structure of this solution is more convenient to use and saves space.

It should be emphasized that: the above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are valid. Still belong to the scope of the technical solution of the present invention.

Claims (10)

1. A backrest installation structure, characterized in that it includes a base (20), and the left and right sides of the base (20) are respectively provided with left and right opposite cushion connecting frames (12), connecting rod G (14), connecting rod H ( 15), connecting rod I (17), connecting rod J (16), connecting rod K (18) and backrest connector (19); the middle of the backrest connector (19) and the upper end of the connecting rod K (18) Hinged, the lower end of the connecting rod K (18) is hinged with the upper rear part of the cushion connecting frame (12), the lower end of the backrest connector (19) is hinged with the upper end of the connecting rod J (16), and the lower end of the connecting rod J (16) It is hinged with the top rear part of the cushion connecting frame (12), the middle of the connecting rod K (18) or the connecting rod J (16) is hinged with one end of the connecting rod I (17), and the other end of the connecting rod I (17) is connected with the connecting rod I (17). The upper end of the rod H (15) is hinged, the middle of the connecting rod H (15) is hinged with the upper rear part of the cushion connecting frame (12), and the lower end of the connecting rod H (15) is hinged with one end of the connecting rod G (14). The other end of the rod G (14) is hinged with the base (20), so that the cushion connecting frame (12), the connecting rod J (16), the connecting rod K (18) and the backrest connector (19) constitute a four-bar linkage; The upper ends of the two backrest connectors (19) arranged opposite to each other are fixedly installed with the backrest seat (3), and the backrest (4) is fixedly installed on the backrest seat (3), and the cushion connecting frame (12) is driven by the driving device Back and forth. 2. A backrest installation structure according to claim 1, characterized in that, the hinge point between the connecting rod J (16) and the cushion connecting frame (12) is located at the point where the connecting rod H (15) and the cushion connecting frame (12 ), the hinge point of the connecting rod H (15) and the cushion connecting frame (12) is located in front of the hinge point of the connecting rod K (18) and the cushion connecting frame (12). 3. The backrest installation structure according to claim 1, characterized in that, near the hinge point between the backrest connector (19) and the connecting rod J (16), a top that can push the rear end of the seat cushion (2) is installed. Waist board, the two ends of the top waist board are respectively fixedly connected with two backrest connectors (19) or connecting rods J (16) arranged opposite to each other on the left and right sides. 4. A backrest installation structure according to claim 1, characterized in that the cushion connecting frame (12) is provided with an elastic potential energy mechanism that always gives the backrest connecting piece (19) a tendency to approach the cushion connecting frame (12) b. 5. The backrest installation structure according to claim 1, characterized in that, the lower front part of the cushion connecting frame (12) is hinged to the lower end of the connecting rod E (9), and the upper end of the connecting rod E (9) It is hinged with the front part of the base (20), the lower rear part of the cushion connecting frame (12) is hinged with the lower end of the connecting rod F (13), and the upper end of the connecting rod F (13) is hinged with the rear part of the base (20), so that , Cushion connecting frame (12), connecting rod E (9), connecting rod F (13) and base (20) constitute four-bar linkage. 6. The backrest installation structure according to claim 1, characterized in that the driving device is a linear push rod motor (22), and one end of the linear push rod motor (22) is movably connected with the base (20), and the straight line The other end of the push rod motor (22) is movably connected with the left and right connecting rods (21), and the upper front part of the cushion connecting frame (12) is hinged with a connecting rod D (11), and the two connecting rods D (11) arranged oppositely on the left and right The left and right connecting rods (21) are fixedly connected and rotated synchronously. 7. A backrest installation structure according to claim 6, characterized in that, between the cushion connecting frame (12) and the connecting rod D (11), there is a device that limits the forward rotation range of the connecting rod D (11). A limiting structure A, a limiting structure B that limits the backward movement range of the cushion connecting frame (12) is provided between the cushion connecting frame (12) and the base (20). 8. A backrest installation structure according to claim 7, characterized in that, the limiting structure A is a limiting column fixed on the cushion connecting frame (12) or the connecting rod D (11), and the limiting The bit structure B is a spacer column fixed on the cushion connecting frame (12) or the base (20). 9 . The backrest installation structure according to claim 6 , characterized in that, the base ( 20 ) is provided with an elastic potential energy mechanism A that always gives the seat cushion connecting frame ( 12 ) a tendency to move backward. 10 . 10. A seat, comprising a backrest installation structure according to any one of claims 1 to 9.