Lengthened leg mechanism, functional iron stand and movable sofa

Abstract

The invention discloses a lengthened leg mechanism. The lengthened leg mechanism comprises a first leg connecting rod and a second leg connecting rod, the front end of the first leg connecting rod is in pivot joint with a third leg connecting rod, the rear portion of the third leg connecting rod is in pivot joint with the front portion of the second leg connecting rod, the front end of the second leg connecting rod is in pivot joint with a fourth leg connecting rod, and the third leg connecting rod and the fourth leg connecting rod are in pivot joint with the same first footrest assembly part. The first footrest assembly part comprises a vertical plate pivoted to the third leg connecting rod and the fourth leg connecting rod, a mounting plate is arranged at the top of the vertical plate, the vertical plate is pivoted to a first footrest connecting rod and a second footrest connecting rod, the other ends of the first footrest connecting rod and the second footrest connecting rod are pivoted to the same second footrest assembly part, and the rear portion of the second footrest assembly part is pivoted to a third footrest connecting rod. The rear end of the third foot rest connecting rod is pivoted to the front end of the fourth leg connecting rod. The problem that in the prior art, for people with long legs, the legs and the feet cannot be completely supported in the leisure posture and the lying posture, and therefore the comfort of the seat is affected is solved.

Description

Technical Field

[0001] The invention relates to the field of home furnishing manufacturing, and in particular to an extended leg mechanism, a functional iron frame and a movable sofa. Background Art

[0002] like Figure 1 As shown, it is an existing extension component (specifically, see the Chinese invention patent with application number 2024200752036, entitled "An Improved High-legged Zero-wall Iron Frame"). After the leg mechanism is opened, the extension distance is short. For people with tall height and long legs, the legs and feet cannot be fully supported in the leisure position or lying position, which affects the comfort of the seat. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide an extended leg mechanism that can fully support the legs and feet in a leisure position or a lying position, thereby improving the comfort of the seat.

[0004] To achieve the above purpose, the technical solution adopted by the extended leg mechanism of the present invention is:

[0005] A lengthened leg mechanism comprises a leg link 1 and a leg link 2, wherein the front end of the leg link 1 is pivotally connected to the leg link 3, the rear part of the leg link 3 is pivotally connected to the front part of the leg link 2, the front end of the leg link 2 is pivotally connected to the leg link 4, the leg links 3 and 4 are pivotally connected to the same footrest assembly 1, the footrest assembly 1 comprises a vertical plate pivotally connected to the leg links 3 and 4, a mounting plate is arranged on the top of the vertical plate, the vertical plate is pivotally connected to the footrest link 1 and the footrest link 2, the other ends of the footrest links 1 and 2 are pivotally connected to the same footrest assembly 2, the rear part of the footrest assembly 2 is pivotally connected to the footrest link 3, and the rear end of the footrest link 3 is pivotally connected to the front end of the leg link 4.

[0006] Preferably, the distance H1 from the axis of the pivot axis of the leg connecting rod 4 and the vertical plate to the top surface of the mounting plate is 120-140 mm.

[0007] Preferably, a footrest connecting rod four is fixedly connected to the upper portion of the inner side wall of the vertical plate, and the front end of the footrest connecting rod four extends out of the vertical plate and is pivotally connected to the rear end of the footrest connecting rod one.

[0008] Preferably, a first limit pin is provided in the middle of the leg link 1, a first limit surface cooperating with the first limit pin is formed on the leg link 2, and a second limit surface cooperating with the first limit pin is formed on the leg link 3.

[0009] Preferably, a second limiting pin is provided at the front of the leg link three, and the vertical plate is provided with a third limiting surface cooperating with the second limiting pin.

[0010] To achieve the above purpose, the technical solution adopted by the functional iron frame of the present invention is:

[0011] A functional iron frame comprises two symmetrical seat frame mounting plates, wherein an extended leg mechanism is mounted on the front side of the seat frame mounting plates, and an extended mounting plate is arranged at the front end of the seat frame mounting plates. The extended mounting plate is used to deepen the seat depth and improve comfort.

[0012] Preferably, a distance H2 between the front end surface of the extension mounting plate and the front end surface of the seat frame mounting plate is 50-90 mm.

[0013] To achieve the above purpose, the technical solution adopted by the movable sofa of the present invention is:

[0014] A movable sofa comprises a sofa seat, wherein a functional iron frame is installed in the sofa seat; when the functional iron frame is in a sitting position, a distance H3 from the highest point of an extended mounting plate to the ground is 280-350 mm.

[0015] Preferably, the height of the sofa feet at the bottom of the sofa seat is 50-100 mm.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. When the leg mechanism is folded, driven by the leg connecting rod 4 and the footrest assembly 1, the footrest connecting rods 1, 2 and 3 drive the footrest assembly 2 to move closer to the footrest assembly 1, and finally hide behind the footrest assembly 1, thereby preventing the small footrest from scratching the ground; when the leg mechanism is unfolded, the footrest connecting rods 1, 2 and 3 support the footrest assembly 2 on the front side of the footrest assembly 1, thereby forming a support surface that can fully support the legs and feet, meeting the needs of users with tall height and long legs, and improving the comfort of the seat.

[0018] 2. The height of the vertical plate is increased. While meeting the installation conditions of the footrest link 1 and the footrest link 2, the distance between the mounting plate and the seat frame mounting plate when the leg mechanism is unfolded is also increased, allowing the user to enter a zero-gravity state when lying down, further improving comfort.

[0019] 3. Install an extension mounting plate at the front end of the seat frame mounting plate to increase the seat depth, further meet the needs of users with tall stature and long legs, and improve comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the stretching assembly of the prior art.

[0021] Figure 2 It is a rear view of the extended leg mechanism of the present invention in the unfolded state.

[0022] Figure 3 It is a front view of the extended leg mechanism of the present invention in the unfolded state.

[0023] Figure 4 It is a back view of the extended leg mechanism of the present invention in a folded state.

[0024] Figure 5 It is a front view of the extended leg mechanism of the present invention in a folded state.

[0025] Figure 6 It is a structural schematic diagram of the functional iron frame of the present invention.

[0026] Figure 7 yes Figure 6 A partial enlarged view of .

[0027] Figure 8 It is a lying posture diagram of the movable sofa of the present invention.

[0028] Fig. 9 It is a sitting posture state diagram of the movable sofa of the present invention.

[0029] Among them, 1 extended leg mechanism, 11 leg connecting rod 1, 111 first limit pin, 12 leg connecting rod 2, 121 first limit surface, 13 leg connecting rod 3, 131 second limit surface, 132 second limit pin, 14 leg connecting rod 4, 15 footrest assembly 1, 151 vertical plate, 1511 third limit surface, 1512 footrest connecting rod 4, 152 mounting plate, 16 footrest connecting rod 2, 17 footrest connecting rod 1, 18 footrest assembly 2, 19 footrest connecting rod 3, 2 seat frame mounting plate, 21 extension mounting plate, 3 sofa seat, 31 sofa foot, 4 push rod motor, 5 drive rod, 6 large footrest, 7 small footrest, 8 backrest mechanism. DETAILED DESCRIPTION

[0030] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0031] like Figure 2-5As shown, an extended leg mechanism 1 includes a leg link 1 11 and a leg link 2 12, the front end of the leg link 1 is pivotally connected to the leg link 3 13, the rear of the leg link 3 is pivotally connected to the front of the leg link 2, the front end of the leg link 2 is pivotally connected to the leg link 4 14, a first limit pin 111 is installed in the middle of the leg link 1, the leg link 2 is provided with a first limit surface 121 that cooperates with the first limit pin, and the leg link 3 is provided with a second limit surface 131 that cooperates with the first limit pin. When unfolded, the first limit pin abuts the first limit surface to improve the stability of the leg mechanism when unfolded. When the leg mechanism is folded, the first limit pin abuts the second limit surface to prevent the leg mechanism from being folded too much and affecting the re-expansion. The leg connecting rods three and four are pivotally connected to the same footrest assembly part 15. The footrest assembly part 1 includes a vertical plate 151. The bottom of the vertical plate is pivotally connected to the leg connecting rod four, the middle rear side of the vertical plate is pivotally connected to the leg connecting rod three, and the second limit pin 132 is installed at the front of the leg connecting rod three. The vertical plate is located between the leg connecting rods three and four. The side wall of the fourth leg is provided with a third limiting surface 1511 which cooperates with the second limiting pin. When the leg mechanism is folded, the second limiting pin contacts the third limiting surface to prevent the footrest assembly part 1 from overturning and affecting its reverse rotation. The top of the vertical plate is bent into a mounting plate 152. The middle part of the vertical plate is pivotally connected to the footrest connecting rod 2 16. The inner side wall of the vertical plate located between the footrest connecting rod 2 and the mounting plate is fixedly connected to the footrest connecting rod 4 1512. The front end of the footrest connecting rod 4 extends out of the vertical plate and is pivotally connected to the footrest connecting rod 1 17. The axis of the leg connecting rod 4 and the vertical plate pivot shaft The distance H1 to the top surface of the mounting plate is 128 mm. The height of the vertical plate is increased. While satisfying the installation conditions of the footrest link 1 and the footrest link 2, the distance between the mounting plate and the seat frame mounting plate is increased when the leg mechanism is unfolded, allowing the user to enter a zero-gravity state when lying down, further improving comfort. The front ends of the footrest links 1 and 2 are pivotally connected to the same footrest assembly 2 18, and the rear end of the footrest assembly 2 is pivotally connected to the footrest link 3 19. The rear end of the footrest link 3 is pivotally connected to the front end of the leg link 4.

[0032] like Figure 6-7 As shown, a functional iron frame includes two symmetrical seat frame mounting plates 2, and an extended leg mechanism is installed on the front side of the seat frame mounting plate. Specifically, leg connecting rods one and two are pivotally connected to the front side wall of the seat frame mounting plate, and an extended mounting plate 21 is installed at the front end of the seat frame mounting plate. The distance H2 between the front end face of the extended mounting plate and the front end face of the seat frame mounting plate is 60 mm, which is used to deepen the seat depth and improve comfort.

[0033] like Figure 8-9 As shown, a movable sofa comprises a sofa seat 3, in which a functional iron frame is installed. When the functional iron frame is in a sitting state, the distance H3 from the highest point of the extended mounting plate to the ground is 290 mm, and the height of the sofa foot 31 at the bottom of the sofa seat is 50-100 mm.

[0034] The specific working process and principle of the movable sofa:

[0035] When in a sitting position, start the push rod motor 4, and the telescopic rod of the push rod motor extends to the front side, driving the leg link 2 to rotate outward around the pivot axis between it and the seat frame mounting plate through the driving rod 5, and the leg link 2 drives the leg links 3 and 4 to unfold to the front side. In the process of unfolding to the front side, the leg link 4 drives the footrest assembly 1 to rotate around the pivot axis between it and the leg link 3. When the footrest assembly 1 rotates, the footrest links 1 and 2 force the footrest assembly 2 to rotate, and support the footrest assembly 2 on the front side of the footrest assembly 2, thereby entering the TV posture. At this time, the large footrest 6 installed on the footrest assembly 1 and the small footrest 7 installed on the footrest assembly 2 can fully support the support surfaces of the legs and feet, meet the usage needs of users with tall height and long legs, and improve the comfort of the seat.

[0036] When the TV posture is converted to the lying posture, the push rod motor can be started, and the telescopic rod of the push rod motor can be extended to the front side, driving the seat frame mounting plate to move obliquely upward to force the backrest mechanism 8 to open. Since the height of the vertical board is increased, the user can enter a zero gravity state at this time, and the comfort is improved.

[0037] When the TV posture is restored to a sitting posture, the push rod motor is started, and the telescopic rod of the push rod motor retracts, driving the leg link 2 to rotate inward around the pivot axis between it and the seat frame mounting plate through the driving rod, and the leg link 2 drives the leg links 3 and 4 to retract rearward. In the process of retracting to the rear, the leg link 4 pulls the footrest assembly 2 through the footrest link 3, forcing the small footrest to move to the bottom of the large footrest and finally hide behind the large footrest.

[0038] The present invention realizes the expansion or folding of the small footrest through a quadrilateral structure composed of footrest assemblies 1 and 2 and footrest links 1 and 2. When the small footrest needs to be expanded, leg links 3 and 4 push the quadrilateral structure to move obliquely upward, and under the action of leg link 3, the quadrilateral structure flips upward, and at the same time, footrest link 3 rotates around its pivot axis with leg link 3, pushing the footrest assembly 2 to move forward, thereby avoiding scratching the ground and reducing the seat height of the functional iron frame. When the seat depth is deepened and the seat height is lowered, for tall and large users, the calf can be avoided from contacting with the large footrest when sitting on the sofa, thereby improving comfort. In addition, because the footrest links 1, 2, and 3 can support the footrest assembly 2 at a longer distance in front of the footrest assembly 1, the distance between the footrest assemblies 1 and 2 is increased by nearly 100 mm compared with the prior art, which can better meet the usage needs of tall and large users.

Claims

1. An extended leg mechanism, comprising a leg link 1 and a leg link 2, wherein the front end of the leg link 1 is pivotally connected to the leg link 3, the rear of the leg link 3 is pivotally connected to the front of the leg link 2, the front end of the leg link 2 is pivotally connected to the leg link 4, the leg links 3 and 4 are pivotally connected to the same footrest assembly 1, the footrest assembly 1 comprises a vertical plate pivotally connected to the leg links 3 and 4, and a mounting plate is arranged on the top of the vertical plate, characterized in that: The vertical plate is pivotally connected with footrest link 1 and footrest link 2, the other ends of footrest links 1 and 2 are pivotally connected with the same footrest assembly part 2, the rear part of footrest assembly part 2 is pivotally connected with footrest link 3, and the rear end of footrest link 3 is pivotally connected to the front end of leg link 4.

2. The extended leg mechanism according to claim 1, characterized in that: The distance H1 from the axis of the pivot axis of the leg connecting rod 4 and the vertical plate to the top surface of the mounting plate is 120-140 mm.

3. The extended leg mechanism according to claim 2, characterized in that: A footrest connecting rod 4 is fixedly connected to the upper part of the inner side wall of the vertical plate, and the front end of the footrest connecting rod 4 extends out of the vertical plate and is pivotally connected to the rear end of the footrest connecting rod 1.

4. The extended leg mechanism according to claim 1, characterized in that: The middle part of the leg connecting rod 1 is provided with a first limiting pin, the leg connecting rod 2 is provided with a first limiting surface matched with the first limiting pin, and the leg connecting rod 3 is provided with a second limiting surface matched with the first limiting pin.

5. The extended leg mechanism according to claim 4, characterized in that: The front part of the leg connecting rod 3 is provided with a second limiting pin, and the vertical plate is provided with a third limiting surface matched with the second limiting pin.

6. A functional iron frame, comprising two symmetrical seat frame mounting plates, characterized in that: The front side of the seat frame mounting plate is installed with the extended leg mechanism as described in any one of claims 1 to 5, and the front end of the seat frame mounting plate is provided with an extended mounting plate.

7. The functional iron frame according to claim 6, characterized in that: The distance H2 between the front end surface of the extension mounting plate and the front end surface of the seat frame mounting plate is 50-90 mm.

8. A movable sofa, comprising a sofa seat, characterized in that: The sofa seat is installed with the functional iron frame as described in any one of claims 6-7. When the functional iron frame is in a sitting position, the distance H3 from the highest point of the extended mounting plate to the ground is 280-350 mm.

9. The movable sofa according to claim 8, characterized in that: The height of the sofa feet at the bottom of the sofa seat is 50-100mm.

Images