Sofa iron stand

Abstract

The utility model belongs to the technical field of sofa iron stands, and particularly relates to a sofa iron stand, which comprises a seat frame mounting plate, a leg stretching mechanism; the front part of the backrest mounting plate is connected with the rear part of the seat frame mounting plate, and the rear part of the backrest mounting plate is connected with the armrest mounting plate through a backrest transmission mechanism; the driving mechanism is suitable for driving the sofa iron stand to be at least switched between the sitting posture position and the lying posture position; wherein the backrest transmission mechanism comprises a first transmission connecting rod, a second transmission connecting rod and a third transmission connecting rod; the middle part of the first transmission connecting rod is hinged to the seat frame mounting plate, the upper part of the first transmission connecting rod is hinged to the rear part of the backrest mounting plate through a second transmission connecting rod, and the lower part of the first transmission connecting rod is hinged to the armrest mounting plate through a third transmission connecting rod. The backrest mounting plate is inclined backwards, so that the included angle between the backrest mounting plate and the seat frame mounting plate is increased, and the comfort level is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sofa iron frames, and in particular relates to a sofa iron frame. Background Art

[0002] In order to improve the comfort, the current sofa is designed to be adjustable in posture, that is, a sofa iron frame is arranged inside the sofa, so as to drive the sofa iron frame to change between a sitting position and a lying position.

[0003] According to relevant technologies, in order to allow people on the sofa to have a better rest, a "zero gravity posture" will be achieved in the lying position, that is, the legs will be opened and lifted; however, the leg extension mechanism is generally arranged at the front of the seat frame mounting plate, and the leg extension mechanism can only be opened to a maximum position close to the mounting surface of the seat frame mounting plate, that is, if the opened leg extension mechanism needs to be lifted, the front of the seat frame mounting plate needs to be raised.

[0004] However, if only the front portion of the seat frame mounting plate is raised, the angle between the backrest and the seat frame mounting plate will become smaller, so that the backrest of a lying person is in a hunched state.

[0005] Therefore, how to make the inclination angle of the backrest more comfortable in combination with the sitting posture of the person during posture adjustment is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] In order to solve the technical problems mentioned in the background technology, the utility model provides a sofa iron frame, which includes: a seat frame mounting plate; a leg extension mechanism, which is connected to the front of the seat frame mounting plate; a backrest mounting plate, whose front part is connected to the rear part of the seat frame mounting plate, and whose rear part is connected to the armrest mounting plate through a backrest transmission mechanism; and a driving mechanism, suitable for driving the sofa iron frame to change at least between a sitting position and a lying position; wherein the backrest transmission mechanism includes: a first transmission connecting rod, a second transmission connecting rod and a third transmission connecting rod; the middle part of the first transmission connecting rod is hinged on the seat frame mounting plate, the upper part thereof is hinged to the rear part of the backrest mounting plate through the second transmission connecting rod, and the lower part thereof is hinged to the armrest mounting plate through the third transmission connecting rod; in the lying position, the third transmission connecting rod is inclined forward by 70° to 90° compared with the sitting position.

[0007] Furthermore, in the lying position, the third transmission link is tilted forward by 75° to 85° compared to the sitting position.

[0008] Furthermore, in the lying position, the third transmission link is tilted forward by 79° compared to the sitting position.

[0009] Furthermore, the third transmission link is hinged to the first transmission link at a hinge point P; in the lying position, the hinge point P is moved forward by a distance L of 62 mm to 82 mm compared to the sitting position.

[0010] Furthermore, the third transmission link is hinged to the first transmission link at a hinge point P; in the lying position, the hinge point P is moved forward by a distance L of 67 mm to 77 mm compared to the sitting position.

[0011] Furthermore, the third transmission link is hinged to the first transmission link at a hinge point P; in the lying position, the hinge point P is moved forward by a distance L of 72 mm compared to the sitting position.

[0012] Furthermore, the third transmission link is hinged to the first transmission link at a hinge point P; in the lying position, the hinge point P is lowered by a height H of 51 mm to 71 mm compared to the sitting position.

[0013] Furthermore, the third transmission link is hinged to the first transmission link at a hinge point P; in the lying position, the hinge point P is lowered by a height H of 56 mm to 66 mm compared to the sitting position.

[0014] Furthermore, in the lying position, the hinge point P is lowered by a height H of 61 mm compared to the sitting position.

[0015] Furthermore, a first extension rod and a second extension rod 12 are provided at the rear of the seat frame mounting plate; the front of the backrest mounting plate is hinged to the first extension rod; and the middle of the first transmission connecting rod is hinged to the second extension rod.

[0016] In the second aspect, the utility model also provides a sofa iron frame, which includes: a seat frame mounting plate; a backrest mounting plate, the front part of which is connected to the rear part of the seat frame mounting plate, and the rear part of which is connected to the armrest mounting plate through a backrest transmission mechanism; and a driving mechanism, suitable for driving the sofa iron frame to change at least between a sitting position and a lying position; wherein the backrest transmission mechanism includes: a first transmission link, a second transmission link and a third transmission link; the middle part of the first transmission link is hinged on the seat frame mounting plate, the upper part of which is hinged to the rear part of the backrest mounting plate through the second transmission link, and the lower part of which is hinged to the armrest mounting plate through the third transmission link; the third transmission link is hinged to the first transmission link at a hinge point P; in the lying position, the hinge point P is moved forward by a distance L of 62mm to 82mm compared with the sitting position.

[0017] Furthermore, the third transmission link is hinged to the first transmission link at a hinge point P; in the lying position, the hinge point P is moved forward by a distance L of 67 mm to 77 mm compared to the sitting position.

[0018] Furthermore, the third transmission link is hinged to the first transmission link at a hinge point P; in the lying position, the hinge point P is moved forward by a distance L of 72 mm compared to the sitting position.

[0019] Furthermore, the third transmission link is hinged to the first transmission link at a hinge point P; in the lying position, the hinge point P is lowered by a height H of 51 mm to 71 mm compared to the sitting position.

[0020] Furthermore, the third transmission link is hinged to the first transmission link at a hinge point P; in the lying position, the hinge point P is lowered by a height H of 56 mm to 66 mm compared to the sitting position.

[0021] Furthermore, in the lying position, the hinge point P is lowered by a height H of 61 mm compared to the sitting position.

[0022] Furthermore, a first extension rod and a second extension rod are provided at the rear of the seat frame mounting plate; the front of the backrest mounting plate is hinged to the first extension rod; and the middle of the first transmission connecting rod is hinged to the second extension rod.

[0023] The beneficial effect of the utility model is that after the leg extension mechanism of the sofa iron frame is unfolded, in order to realize the lifting of the leg extension mechanism, the scheme rotates forward through the third transmission link to pull the rear part of the seat frame mounting plate to sink, thereby making the front part of the seat frame mounting plate rise, that is, lifting the leg extension mechanism; at the same time, in the process of the third transmission link rotating forward, the first transmission link can be pulled to rotate around its middle part, so that the backrest mounting plate can be tilted backward, thereby increasing the angle between the backrest mounting plate and the seat frame mounting plate, thereby improving the comfort.

[0024] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the structure of the sofa iron frame in the sitting position;

[0028] Figure 2 This is a structural diagram of the sofa iron frame in the TV posture position;

[0029] Figure 3 This is a structural diagram of the sofa iron frame in a lying position;

[0030] Figure 4 yes Figure 1 A schematic diagram of the method structure at the middle A;

[0031] Figure 5 yes Figure 2 A schematic diagram of the method structure at B;

[0032] Figure 6 yes Figure 3 Schematic diagram of the method structure at C;

[0033] Figure 7 is a schematic diagram of the structure of the third transmission connecting rod in a sitting position and a lying position;

[0034] Figure 8 It is a schematic diagram of the connection structure between the seat frame mounting plate and the armrest mounting plate.

[0035] In the figure:

[0036] The seat frame mounting plate 1, the first extension rod 11, the second extension rod 12, the auxiliary mounting plate 13, the front swing rod 14, and the rear swing rod 15;

[0037] Leg extension mechanism 2, footrest 21, first connecting rod 22, second connecting rod 23, third connecting rod 24, fourth connecting rod 25, fifth connecting rod 26, sixth connecting rod 27;

[0038] Backrest mounting plate 3;

[0039] A first transmission connecting rod 41, a second transmission connecting rod 42, and a third transmission connecting rod 43;

[0040] Handrail mounting plate 5;

[0041] The hinge point P between the third transmission link and the first transmission link, the forward movement distance L of the hinge point P, the descending height H of the hinge point P, and the rotation angle α of the third transmission link. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] like Figure 1 , Figure 2 , Figure 3 As shown, at least one embodiment provides a sofa iron frame, which includes: a seat frame mounting plate 1; a leg extension mechanism 2, connected to the front of the seat frame mounting plate 1; a backrest mounting plate 3, the front of which is connected to the rear of the seat frame mounting plate 1, and the rear of which is connected to the armrest mounting plate 5 through a backrest transmission mechanism; and a driving mechanism, suitable for driving the sofa iron frame to change at least between a sitting position and a lying position; wherein the backrest transmission mechanism includes: a first transmission link 41, a second transmission link 42 and a third transmission link 43; the middle part of the first transmission link 41 is hinged on the seat frame mounting plate 1, the upper part of which is hinged to the rear of the backrest mounting plate 3 through the second transmission link 42, and the lower part of which is hinged to the armrest mounting plate 5 through the third transmission link 43; in the lying position, the third transmission link 43 is tilted forward by 70° to 90° compared with the sitting position.

[0044] In some embodiments, a leg extension mechanism 2 is installed at the front of the seat frame mounting plate 1, and a backrest mounting plate 3 is installed at the rear. When the leg extension mechanism 2 is unfolded, in order to lift the leg extension mechanism 2, the present scheme rotates forward through the third transmission link 43 to pull the rear of the seat frame mounting plate 1 to sink, thereby making the front of the seat frame mounting plate 1 rise, that is, lifting the leg extension mechanism 2; at the same time, in the process of the third transmission link 43 rotating forward, the first transmission link 41 can be pulled to rotate around its middle, so that the backrest mounting plate 3 can be tilted backward, thereby increasing the angle between the backrest mounting plate 3 and the seat frame mounting plate 1, thereby improving the comfort.

[0045] In some embodiments, the seat frame mounting plate 1 is mounted on the armrest portion of the sofa (not shown) through the armrest mounting plate 5, wherein the seat frame mounting plate 1 is movably connected to the armrest mounting plate 5 through a connecting rod assembly; specifically, Figure 8 As shown, the connecting rod assembly includes: an auxiliary mounting plate 13, a front swing rod 14 and a rear swing rod 15. The seat frame mounting plate 1 is connected to the auxiliary mounting plate 13 through the front swing rod 14 and the rear swing rod 15. The auxiliary mounting plate 13 is then connected to the armrest mounting plate 5 through other components of the connecting rod assembly, which is the prior art.

[0046] In some embodiments, Figure 3As shown, the leg extension mechanism 2 includes: a first link 22, a second link 23, a third link 24, a fourth link 25, a fifth link 26, and a sixth link 27; specifically, the first link 22 and the second link 23 are hinged to the seat frame mounting plate 1 respectively, the third link 24 and the fourth link 25 are hinged to the first link 22 and the second link 23 respectively, the middle part of the fourth link 25 is hinged to the second link 23, the sixth link 27 is hinged to the fourth link 25 and the fifth link 26, the footrest 21 is hinged to the sixth link 27, and the fifth link 26 is hinged to the fourth link 25 and the sixth link 27.

[0047] In some embodiments, a first extension rod 11 is provided at the rear of the seat frame mounting plate 1, and the front of the backrest mounting plate 3 is hinged to the first extension rod 11; wherein, the hinge point between the backrest mounting plate 3 and the first extension rod 11 is used to drive the backrest bracket 3 to move forward and rise and fall.

[0048] In some embodiments, a second extension rod 12 is provided at the rear portion of the seat frame mounting plate 1, the middle portion of the first transmission link 41 is hinged to the second extension rod 12, the upper portion is hinged to the rear portion of the backrest mounting plate 3 through the second transmission link 42, and the lower portion is hinged to the armrest mounting plate 5 through the third transmission link 43; wherein, when the sofa iron frame changes from a sitting position to a lying position, the seat frame mounting plate 1 will move forward relative to the armrest mounting plate 5, the forward movement of the seat frame mounting plate 1 will drive the first transmission link 41 to move forward, and the forward movement of the first transmission link 41 will cause the third transmission link 43 to rotate forward by an angle α, specifically, during the forward rotation of the third transmission link 43, the hinge point P thereon will pull the first transmission link 41 down to cause the rear portion of the seat frame mounting plate 1 to sink, and at the same time, the hinge point P will pull the first transmission link 41 to rotate, thereby pulling the second transmission link 42 down, causing the backrest mounting plate 3 to tilt backward, so as to increase the angle between the backrest mounting plate 3 and the seat frame mounting plate 1, thereby improving comfort.

[0049] In some embodiments, Figure 1 As shown, one end of the driving mechanism (not shown in the figure) is fixedly connected to the armrest mounting plate 5, and the other end acts on the leg extension mechanism 2. The working principle and installation position of the driving mechanism are the existing technology and are not improved.

[0050] like Figure 4 and Figure 6 As shown, during the process of adjusting the sofa iron frame from a sitting position to a lying position, the third transmission link 43 rotates forward, and the rotation angle α thereof ranges from 70° to 90°; preferably, the rotation angle α ranges from 75° to 85°; more preferably, the rotation angle α is 79°.

[0051] like Figure 7As shown, during the process of adjusting the sofa iron frame from a sitting position to a lying position, the third transmission connecting rod 43 will rotate as shown in the figure; wherein, the forward movement distance L of the hinge point P is 62mm to 82mm, preferably, the forward movement distance L is 67mm to 77mm, and more preferably, the forward movement distance L is 72mm; wherein, the descent height H of the hinge point P is 51mm to 71mm, preferably, the descent height H is 56mm to 66mm, and more preferably, the descent height H is 61mm.

[0052] To sum up, after the leg extension mechanism 2 of the sofa iron frame is unfolded, in order to achieve the lifting of the leg extension mechanism 2, this scheme rotates forward through the third transmission link 43 to pull the rear part of the seat frame mounting plate 1 to sink, thereby making the front part of the seat frame mounting plate 1 rise, that is, lifting the leg extension mechanism 2; at the same time, in the process of the third transmission link 43 rotating forward, the first transmission link 41 can be pulled to rotate around its middle, so that the backrest mounting plate 3 can be tilted backward, thereby increasing the angle between the backrest mounting plate 3 and the seat frame mounting plate 1, thereby improving the comfort.

[0053] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0054] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0056] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A sofa iron frame, characterized in that: include: Seat frame mounting plate (1); A leg extension mechanism (2) connected to the front portion of the seat frame mounting plate (1); A backrest mounting plate (3), the front portion of which is connected to the rear portion of the seat frame mounting plate (1), and the rear portion of which is connected to the armrest mounting plate (5) via a backrest transmission mechanism; as well as A driving mechanism, adapted to drive the sofa iron frame to change between at least a sitting position and a lying position; in The backrest transmission mechanism comprises: a first transmission connecting rod (41), a second transmission connecting rod (42) and a third transmission connecting rod (43); The middle portion of the first transmission link (41) is hinged on the seat frame mounting plate (1), the upper portion is hinged to the rear portion of the backrest mounting plate (3) via the second transmission link (42), and the lower portion is hinged to the armrest mounting plate (5) via the third transmission link (43); In the lying position, the third transmission link (43) is tilted forward by 70° to 90° compared to the sitting position.

2. The sofa iron frame according to claim 1, characterized in that: In the lying position, the third transmission link (43) is tilted forward by 75° to 85° compared to the sitting position.

3. The sofa iron frame according to claim 1, characterized in that: In the lying position, the third transmission link (43) is tilted forward by 79° compared to the sitting position.

4. The sofa iron frame according to claim 1, characterized in that: The third transmission connecting rod (43) is hinged to the first transmission connecting rod (41) at a hinge point P; In the lying position, the hinge point P is moved forward by a distance L of 62 mm to 82 mm compared to the sitting position.

5. The sofa iron frame according to claim 1, characterized in that: The third transmission connecting rod (43) is hinged to the first transmission connecting rod (41) at a hinge point P; In the lying position, the hinge point P is displaced forward by a distance L of 67 mm to 77 mm compared to the sitting position.

6. The sofa iron frame according to claim 1, characterized in that: The third transmission connecting rod (43) is hinged to the first transmission connecting rod (41) at a hinge point P; In the lying position, the hinge point P is moved forward by a distance L of 72 mm compared to the sitting position.

7. The sofa iron frame according to claim 1, characterized in that: The third transmission connecting rod (43) is hinged to the first transmission connecting rod (41) at a hinge point P; In the lying position, the hinge point P is lowered by a height H of 51 mm to 71 mm compared to the sitting position.

8. The sofa iron frame according to claim 1, characterized in that: The third transmission connecting rod (43) is hinged to the first transmission connecting rod (41) at a hinge point P; In the lying position, the hinge point P is lowered by a height H of 56 mm to 66 mm compared to the sitting position.

9. The sofa iron frame according to claim 8, characterized in that: In the lying position, the hinge point P is lowered by a height H of 61 mm compared to the sitting position.

10. The sofa iron frame according to claim 1, characterized in that: A first extension rod (11) and a second extension rod (12) are provided at the rear of the seat frame mounting plate (1); The front portion of the backrest mounting plate (3) is hingedly connected to the first extension rod (11); The middle portion of the first transmission connecting rod (41) is hinged to the second extension rod (12).

11. A sofa iron frame, characterized in that: include: Seat frame mounting plate (1); A backrest mounting plate (3), the front portion of which is connected to the rear portion of the seat frame mounting plate (1), and the rear portion of which is connected to the armrest mounting plate (5) via a backrest transmission mechanism; as well as A driving mechanism, adapted to drive the sofa iron frame to change between at least a sitting position and a lying position; in The backrest transmission mechanism comprises: a first transmission connecting rod (41), a second transmission connecting rod (42) and a third transmission connecting rod (43); The middle portion of the first transmission link (41) is hinged on the seat frame mounting plate (1), the upper portion is hinged to the rear portion of the backrest mounting plate (3) via the second transmission link (42), and the lower portion is hinged to the armrest mounting plate (5) via the third transmission link (43); The third transmission connecting rod (43) is hinged to the first transmission connecting rod (41) at a hinge point P; In the lying position, the hinge point P is moved forward by a distance L of 62 mm to 82 mm compared to the sitting position.

12. The sofa iron frame according to claim 11, characterized in that: In the lying position, the hinge point P is displaced forward by a distance L of 67 mm to 77 mm compared to the sitting position.

13. The sofa iron frame according to claim 11, characterized in that: In the lying position, the hinge point P is moved forward by a distance L of 72 mm compared to the sitting position.

14. The sofa iron frame according to claim 11, characterized in that: In the lying position, the hinge point P is lowered by a height H of 51 mm to 71 mm compared to the sitting position.

15. The sofa iron frame according to claim 11, characterized in that: In the lying position, the hinge point P is lowered by a height H of 56 mm to 66 mm compared to the sitting position.

16. The sofa iron frame according to claim 11, characterized in that: In the lying position, the hinge point P is lowered by a height H of 61 mm compared to the sitting position.

17. The sofa iron frame according to claim 11, characterized in that: A first extension rod (11) and a second extension rod (12) are provided at the rear of the seat frame mounting plate (1); The front portion of the backrest mounting plate (3) is hingedly connected to the first extension rod (11); The middle portion of the first transmission connecting rod (41) is hinged to the second extension rod (12).

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