Anti-scraping leg mechanism with high foot lifting function and functional iron stand

Abstract

The invention discloses a leg mechanism capable of preventing ground scraping and lifting a foot at a high position. The anti-scraping 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 through a first shaft, and the front side of the fourth leg connecting rod is in pivot joint with a first footrest assembly part through a second shaft. The front end of the fourth leg connecting rod is in pivot joint with a second foot rest assembly part through a third shaft, the middle of the second foot rest assembly part is in pivot joint with a first foot rest connecting rod, the front end of the first foot rest connecting rod is in pivot joint with the second foot rest assembly part, and the rear end of the first foot rest connecting rod is in pivot joint with the first foot rest assembly part. The vertical distance H1 from the axis of the second shaft to the mounting surface of the footrest assembly part I is 120-140 mm, and the minimum distance H2 between the axis of the second shaft and the axis of the third shaft is 100-120 mm. The problems that in the prior art, the requirements of some users cannot be met, and the use comfort is poor are solved.

Description

Technical Field

[0001] The invention relates to the field of home furnishing manufacturing, and in particular to a scratch-resistant floor, high-lift leg mechanism and a functional iron frame. Background Art

[0002] The existing Chinese invention patent with publication number CN221931646U and name "An Improved High-legged Zero-wall Iron Frame" discloses a leg mechanism including a footrest assembly plate 1, a leg connecting rod 1 is pivotally connected to the tail of the leg connecting rod 1, a leg connecting rod 3 is pivotally connected to the front side of the seat frame mounting plate, a front end of the driving connecting rod is pivotally connected to the tail of the leg connecting rod 3, a leg connecting rod 2 is pivotally connected to the middle and lower part of the footrest assembly plate 1, a leg connecting rod 4 is pivotally connected to the tail of the leg connecting rod 2, a middle part of the leg connecting rod 4 is pivotally connected to the leg connecting rod 1, a tail end of the leg connecting rod 4 is pivotally connected to the front side of the seat frame mounting plate, a front part of the leg connecting rod 2 is pivotally connected to the footrest assembly plate 2, a leg connecting rod 5 is pivotally connected to the middle part of the footrest assembly plate 2, and the other end of the leg connecting rod 5 is pivotally connected to the footrest assembly plate 1. The function of the footrest assembly plate 1 is to install the main footrest, and the function of the footrest assembly plate 2 is to install the auxiliary footrest, which is an extension of the main footrest to meet the needs of people with tall height and long legs and improve the comfort of use. However, when the leg structure is unfolded, the distance between the installation surfaces of the footrest assembly plates 1 and 2 is 80mm, which still cannot meet the needs of some users and the comfort of use is poor. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide a scratch-resistant, high-lift leg mechanism that increases the extension distance of an auxiliary footrest and improves user comfort.

[0004] To achieve the above purpose, the technical solution adopted by the anti-scratch and high-lift leg mechanism of the present invention is:

[0005] A scratch-proof, high-lift 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 through a first axis, the front side of the leg link 4 is pivotally connected to a footrest assembly part 1 through a second axis, the rear side of the footrest assembly part 1 is pivotally connected to the leg link 3, and the front end of the leg link 4 is pivotally connected to the footrest assembly part 1 through a third axis. Foot assembly part two, the middle part of footrest assembly part two is pivotally connected with footrest connecting rod one, the front end of footrest connecting rod one is pivotally connected to footrest assembly part two, the rear end of footrest connecting rod one is pivotally connected to footrest assembly part one, the vertical distance H1 from the axis of the second shaft to the mounting surface of footrest assembly part one is 120-140mm, the minimum distance H2 between the axis of the second and third shafts is 100-120mm, and the lowest point of footrest assembly part two during movement is not lower than the axis of the first shaft.

[0006] Preferably, the leg connecting rod 3 is provided with a first limit pin on one side adjacent to the footrest assembly 1, and the footrest assembly 1 is provided with a first limit surface cooperating with the first limit pin.

[0007] Preferably, the leg connecting rod three is provided with a second limiting pin between the leg connecting rods one and two, and the leg connecting rod two is provided with a second limiting surface and a third limiting surface cooperating with the second limiting pin.

[0008] Preferably, a footrest connecting rod 2 is fixedly connected to the front side of the footrest assembly part 1, and the front end of the footrest connecting rod 2 extends toward the footrest assembly part 2 and is pivotally connected to the rear end of the footrest connecting rod 1.

[0009] To achieve the above purpose, the technical solution adopted by the functional iron frame of the present invention is:

[0010] A functional iron frame comprises an assembly side panel, wherein the assembly side panel is connected to a seat frame mounting plate through a seat linkage mechanism, the front side of the seat frame mounting plate is mounted with the anti-scratch, high-lift leg mechanism as claimed in any one of claims 1 to 4, and the rear side of the seat frame mounting plate is provided with a backrest mechanism.

[0011] Preferably, an extended mounting plate is provided at the front end of the seat frame mounting plate, and a distance H3 between the front end face of the extended mounting plate and the front end face of the seat frame mounting plate is 50-90 mm.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. Increase the extension distance of the leg link 4 relative to the footrest assembly 1, and at the same time increase the height of the mounting surface of the footrest assembly 1, leaving assembly space for the footrest link 1, so that the footrest assembly 2 can be sent out a farther distance relative to the footrest assembly 1 when the leg mechanism is fully unfolded, that is, the extension distance of the auxiliary footrest can be increased, thereby improving user comfort.

[0014] 2. After the height of the installation surface of the footrest assembly is increased, the height of the user's feet can also be increased when the user is lying down, allowing the user to enter a zero-gravity state when lying down, further improving comfort.

[0015] 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

[0016] Figure 1 This is a diagram of the existing leg mechanism in a fully expanded state.

[0017] Figure 2 It is a state diagram of the anti-scratch and high-lift leg mechanism of the present invention being fully deployed.

[0018] Figure 3It is a diagram showing the state in which the anti-scratch and high-leg leg mechanism of the present invention is completely folded.

[0019] Figure 4 This is a state diagram in which the lowest point of the footrest assembly 2 is closest to the ground during its movement.

[0020] Figure 5 It is a structural schematic diagram of the functional iron frame of the present invention.

[0021] Figure 6 yes Figure 5 Enlarged view of point C.

[0022] Among them, 10 anti-scratch, high-lift leg mechanism, 101 leg connecting rod one, 102 leg connecting rod two, 1021 second limiting surface, 1022 third limiting surface, 103 leg connecting rod three, 1031 second limiting pin, 1032 first limiting pin, 104 first axis, 105 leg connecting rod four, 106 second axis, 107 footrest assembly one, 1071 first limiting surface, 108 third axis, 109 footrest assembly two, 110 footrest connecting rod one, 111 footrest connecting rod two, 112 fourth axis, 20 assembly side panel, 30 seat linkage mechanism, 40 seat frame mounting plate, 401 extension mounting plate, 50 backrest mechanism, 60 push rod motor. DETAILED DESCRIPTION

[0023] 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.

[0024] like Figure 2-4As shown, a scratch-proof, high-foot-lifting leg mechanism 10 includes a leg link 1 101 and a leg link 2 102, the front end of the leg link 1 is pivotally connected to the leg link 3 103, the rear part of the leg link 3 is pivotally connected to the front part of the leg link 2, the leg link 3 is located between the leg links 1 and 2 and is installed with a second limit pin 1031, the leg link 2 is provided with a second limit surface 1021 and a third limit surface 1022 that cooperate with the second limit pin, the front end of the leg link 2 is pivotally connected to the leg link 4 105 through the first axis 104, the front side of the leg link 4 is pivotally connected to the footrest assembly 1 107 through the second axis 106, the rear side of the footrest assembly 1 is pivotally connected to the leg link 3, the leg link 3 is installed with the first limit pin 1032 next to one side of the footrest assembly 1, and the footrest assembly Accessory one is provided with a first limiting surface 1071 which cooperates with the first limiting pin, the front end of the leg link four is pivotally connected to the footrest assembly two 109 through the third axis 108, the middle part of the footrest assembly two is pivotally connected to the footrest link one 110, the front end of the footrest link one is pivotally connected to the footrest assembly two, the front side of the footrest assembly one is fixedly connected to the footrest link two 111, the front end of the footrest link two extends toward the footrest assembly two, and is pivotally connected to the rear end of the footrest link one, the footrest link two reduces the manufacturing difficulty of the footrest assembly one, and also reduces the manufacturing cost, the vertical distance H1 from the second axis line to the mounting surface of the footrest assembly one is 125mm, the minimum distance H2 between the second and third axis lines is 108mm, and the lowest point of the footrest assembly two is not lower than the first axis line during movement.

[0025] The specific working process and principle of the anti-scratch and high-lift leg mechanism of the present invention are as follows:

[0026] When converting from the fully folded state to the fully extended state, the lower ends of the leg links 1 and 2 rotate outward, driving the leg links 3 and 4 to extend outward first obliquely downward and then obliquely upward. The leg link 4 drives the footrest assembly 1 to rotate around the fourth axis 112, and the mounting surface of the footrest assembly 1 tends to be horizontal. The footrest link 2 pulls the footrest assembly 2 to rotate around the third axis through the footrest link 1. Due to the increase in the extended length of the leg link 4 relative to the footrest assembly 1 and the increase in the vertical height of the third axis relative to the first axis, the lowest point of the footrest assembly 2 can be Keep it not lower than the axis of the first axis to avoid scraping the ground, until the second limit pin conflicts with the third limit surface to prevent the leg mechanism from being over-expanded and unable to retract. At this time, the minimum distance H4 between the first and second mounting surfaces of the footrest assembly is 147mm, which is nearly 70mm longer than the prior art, thereby further meeting the use needs of people with tall stature and long legs and improving the use comfort. At the same time, after the height of the mounting surface of the footrest assembly is increased, the height of the user's feet can also be increased when the user is lying down, allowing the user to enter a zero gravity state when lying down, further improving comfort.

[0027] When converting from the fully expanded state to the fully folded state, the process is the opposite.

[0028] like Figure 5-6 As shown, a functional iron frame includes two symmetrical assembly side panels 20, which are connected to a seat frame mounting plate 40 through a seat linkage mechanism 30, an extension mounting plate 401 is installed at the front end of the seat frame mounting plate, a distance H3 between the front end face of the extension mounting plate and the front end face of the seat frame mounting plate is 70 mm, an anti-scratch and high-lift leg mechanism is installed on the front side of the seat frame mounting plate, and a backrest mechanism 50 is installed on the rear side of the seat frame mounting plate, the seat linkage mechanism and the backrest mechanism are prior art (see patent document with publication number CN221931646U).

[0029] The specific working process and principle of the functional iron frame of the present invention are as follows:

[0030] When in sitting position, start the push rod motor 60, the telescopic rod of the push rod motor extends forward, driving the anti-scratch and high-leg leg mechanism to fully unfold, entering the TV posture state, continue to start the push rod motor, drive the backrest mechanism to fully unfold through the seat frame mounting plate, entering the lying position state.

[0031] Since the anti-scratch and high-lift leg mechanism of the present invention will not scratch the ground during exercise, the seat height of the functional iron frame can be reduced. When the seat depth is deepened and the seat height is reduced, the calf of tall and large users can avoid contact with the large footrest of the movable sofa when sitting on the sofa, thereby improving comfort. When the seat height of the movable sofa remains unchanged, the space after the seat frame mounting plate is lowered relative to the ground can be used to increase the thickness of the soft bag, which can also improve user comfort.

Claims

1. A scratch-proof, high-foot-lifting 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 through a first axis, the front side of the leg link 4 is pivotally connected to a footrest assembly part 1 through a second axis, the rear side of the footrest assembly part 1 is pivotally connected to the leg link 3, the front end of the leg link 4 is pivotally connected to the footrest assembly part 2 through a third axis, the middle part of the footrest assembly part 2 is pivotally connected to the footrest link 1, the front end of the footrest link 1 is pivotally connected to the footrest assembly part 2, and the rear end of the footrest link 1 is pivotally connected to the footrest assembly part 1, characterized in that: The vertical distance H1 from the second axis to the mounting surface of the footrest assembly is 120-140 mm, the minimum distance H2 between the second and third axis is 100-120 mm, and the lowest point of the footrest assembly is not lower than the first axis during movement.

2. The anti-scratch, high-lift leg mechanism according to claim 1, characterized in that: The leg connecting rod 3 is provided with a first limiting pin on one side adjacent to the footrest assembly part 1, and the footrest assembly part 1 is provided with a first limiting surface matched with the first limiting pin.

3. The anti-scratch, high-lift leg mechanism according to claim 2, characterized in that: The leg connecting rod three is provided with a second limiting pin between the leg connecting rods one and two, and the leg connecting rod two is provided with a second limiting surface and a third limiting surface matched with the second limiting pin.

4. The anti-scratch, high-lift leg mechanism according to claim 1, characterized in that: The front side of the footrest assembly part 1 is fixedly connected with a footrest connecting rod 2, the front end of the footrest connecting rod 2 extends toward the footrest assembly part 2 and is pivotally connected with the rear end of the footrest connecting rod 1.

5. A functional iron frame, comprising two symmetrical assembly side panels, the assembly side panels being connected to a seat frame mounting plate through a seat linkage mechanism, characterized in that: The front side of the seat frame mounting plate is installed with the anti-scratch, high-lift leg mechanism as described in any one of claims 1 to 4, and the rear side of the seat frame mounting plate is provided with a backrest mechanism.

6. The functional iron frame according to claim 5, characterized in that: An extension mounting plate is arranged at the front end of the seat frame mounting plate, and a distance H3 between the front end face of the extension mounting plate and the front end face of the seat frame mounting plate is 50-90 mm.

Images