Footrest mechanism for furniture
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DONGGUAN WEIHONG SMART HOME TECH CO LTD
- Filing Date
- 2026-06-05
- Publication Date
- 2026-07-21
Smart Images
Figure CN122423735A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a type of furniture, and more particularly to a leg support mechanism for furniture. Background Technology
[0002] With the continuous development of the economy and the continuous progress of society, people's lives are provided with an increasingly rich variety of material consumer goods, and sofas are one of these many material consumer goods.
[0003] Currently, adjustable armrest floor-standing sofas are equipped with an internal extendable iron frame. This extendable iron frame includes a footrest, a seat cushion, and a backrest mechanism. These three components can be connected by a series of mechanical linkages to adjust the relative positions and angles of the sofa's footrest, seat cushion, and backrest, thereby allowing the sofa to switch between sitting, relaxing, and fully reclining positions to meet people's usage needs.
[0004] However, in the existing foot support devices of the extension iron frame, due to the unreasonable structural design of the foot support device, the foot support device will wobble up and down due to insufficient support after extension. In particular, the up and down wobble is more serious at the hinge of the foot support device due to the increased wear gap.
[0005] Therefore, there is an urgent need for a furniture leg support mechanism to overcome one or more of the above-mentioned defects. Summary of the Invention The purpose of this invention is to provide a furniture leg support mechanism that solves the problem of furniture wobbling up and down.
[0006] To achieve the above objectives, the furniture leg rest mechanism of the present invention is assembled on a cushion frame and can move at least to a retracted position behind the cushion frame or to an extended position in front of the cushion frame. It includes a front leg rest link, a rear leg rest link, a leg rest head assembly, a first front and rear extension rod, a second front and rear extension rod, an intermediate connecting assembly that is hinged to the cushion frame, the lower end of the front leg rest link, and the lower end of the rear leg rest link, respectively, and a third front and rear extension rod located behind the second front and rear extension rod and having a length shorter than the first front and rear extension rod. The footrest assembly is hinged to the front ends of the first and second front and rear extension rods, respectively. The rear ends of the first and second front and rear extension rods are hinged to the front and rear footrest connecting rods, respectively. The length of the first and second front and rear extension rods is greater than the length of the second front and rear extension rods. The third front and rear extension rod is hinged to the front and rear footrest connecting rods in sequence. The front end of the third front and rear extension rod is hinged to the rear end of the second front and rear extension rods. In the extended position, the second front and rear extension rods are inclined at an angle of front-up and rear-down relative to the first front and rear extension rods. The angle between the second and first front and rear extension rods is greater than 15 degrees and less than 20 degrees.
[0007] Compared with existing technologies, the design utilizes a structure where "the second front and rear extension rod is inclined relative to the first front and rear extension rod in the extended position, with the included angle being greater than 15 degrees and less than 20 degrees; a third front and rear extension rod is located behind the second front and rear extension rod and is shorter than the first front and rear extension rod, and the third front and rear extension rod is hinged to the front footrest link and the rear footrest link in sequence; and the rear ends of the first front and rear extension rod are respectively hinged to the front footrest link and the rear footrest link." This design allows the third front and rear extension rod to be supported by both the front footrest link and the rear footrest link, while simultaneously forming a four-bar linkage with the first front and rear extension rod, the front footrest link, and the rear footrest link. The supporting effect of the third front and rear extension rod on the second front and rear extension rod and the supporting effect of the rear footrest link on the third front and rear extension rod are mutually canceling lever effects centered on the hinge center line of the third front and rear extension rod and the front footrest link. Therefore, the supporting strength of the third front and rear extension rod and the third front and rear extension rod on the second front and rear extension rod and the footrest head assembly is increased. In order to prevent the third front and rear extension rod, which supports the second front and rear extension rod, from wobbling up and down around the hinge center line of the third front and rear extension rod and the front footrest link when the furniture footrest mechanism of the present invention is in the extended position, the furniture footrest mechanism of the present invention solves the defect of up and down wobbling.
[0008] Preferably, the rear ends of the first front and rear extension rods are respectively hinged to the upper ends of the front footrest link and the rear footrest link; the front footrest link is provided with a first intermediate hinge structure located between the upper and lower ends of the front footrest link, and the rear footrest link is provided with a second intermediate hinge structure located between the upper and lower ends of the rear footrest link; the third front and rear extension rods are hinged to the first intermediate hinge structure and the second intermediate hinge structure in sequence.
[0009] Preferably, the front footrest link has a first outward protrusion, and the first intermediate hinge structure is located on the first outward protrusion; the rear footrest link has a second outward protrusion, and the second intermediate hinge structure is located on the second outward protrusion.
[0010] Preferably, the width of the first front and rear extension bar is greater than the width of the second and third front and rear extension bars.
[0011] Preferably, the length of the second front and rear extension rod is less than the length of the third front and rear extension rod.
[0012] Preferably, the furniture leg rest mechanism of the present invention further includes a limiting guide assembly mounted on the cushion frame, wherein the first front and rear extension rod passes through the limiting guide assembly in the front-rear direction of the cushion frame; during the switching of the furniture leg rest mechanism between the extended position and the retracted position, the first front and rear extension rod slides along the limiting guide assembly, and the limiting guide assembly also supports the first front and rear extension rod from below.
[0013] Preferably, the footrest assembly includes a first footrest with a first support portion, a second footrest with a second support portion, and a footrest connecting rod; the first footrest has a first hinge structure for hinged to the front end of the first front and rear extension rod, a second hinge structure away from the first hinge structure, and a third hinge structure located between the first hinge structure and the second hinge structure; the second footrest is hinged to the second hinge structure; the first end of the footrest connecting rod is hinged to the second footrest at a position between the second support portion and the second hinge structure; the front end of the second front and rear extension rod is forward-facing sequentially hinged to the third hinge structure and the second end of the footrest connecting rod; in the extended position, the first front and rear extension rod, the second front and rear extension rod, and the third front and rear extension rod slide out of the seat cushion frame, with the first support portion and the second support portion facing upwards; in the retracted position, the first front and rear extension rod, the second front and rear extension rod, and the third front and rear extension rod slide back into the seat cushion frame, with the first support portion and the second support portion arranged in a forward-downward orientation.
[0014] Preferably, the intermediate connecting assembly includes a front footrest swing arm, a rear footrest swing arm, and a first intermediate connecting rod located below the seat cushion frame and extending along the front-rear direction of the seat cushion frame; the upper ends of both the front footrest swing arm and the rear footrest swing arm are hinged to the seat cushion frame, the lower end of the front footrest swing arm is hinged downwards to the lower end of the front footrest connecting rod and the front end of the first intermediate connecting rod in sequence; the lower end of the rear footrest swing arm is hinged to the lower end of the rear footrest connecting rod, and the rear end of the first intermediate connecting rod is hinged to the rear footrest connecting rod at a position between the upper and lower ends of the rear footrest connecting rod.
[0015] Preferably, the intermediate connecting assembly further includes a second intermediate link located below the seat frame and extending along the front-to-back direction of the seat frame, the front end of the second intermediate link being hinged to the front footrest swing arm, and the rear end of the second intermediate link being hinged to the rear footrest swing arm.
[0016] Preferably, the front footrest arm is provided with a first hinge structure for hinged to the seat cushion frame, a second hinge structure for hinged to the second intermediate link, a third hinge structure for hinged to the front footrest link, and a fourth hinge structure for hinged to the first intermediate link, the second, third, and fourth hinge structures being arranged sequentially and downwardly spaced apart; the rear footrest arm is provided with a fifth hinge structure for hinged to the seat cushion frame, a sixth hinge structure for hinged to the second intermediate link, and a seventh hinge structure for hinged to the rear footrest link, the sixth and seventh hinge structures being arranged sequentially and downwardly spaced apart.
[0017] Preferably, the footrest rear link is located between the first intermediate link and the second intermediate link in the left-right direction of the seat cushion frame. Attached Figure Description
[0018] Figure 1 This is a perspective view of the furniture leg support mechanism of the present invention, which is mounted on the cushion frame and is in the retracted position.
[0019] Figure 2 yes Figure 1 The diagram shown is an exploded three-dimensional view of the furniture's leg support mechanism.
[0020] Figure 3 yes Figure 1 The furniture shown is a plan view of the furniture with a leg support mechanism as seen in the direction indicated by arrow B.
[0021] Figure 4 This is a perspective view of the furniture leg support mechanism of the present invention, which is mounted on a cushion frame and is in the extended position.
[0022] Figure 5 yes Figure 4 The diagram shown is an exploded three-dimensional view of the furniture's leg support mechanism.
[0023] Figure 6 yes Figure 5 A three-dimensional exploded view from another angle.
[0024] Figure 7 yes Figure 6 The furniture shown is a plan view of the furniture with a leg support mechanism as indicated by arrow C. Detailed Implementation
[0025] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings.
[0026] Please see Figure 1 and Figure 4 The furniture leg rest mechanism 100 of the present invention is assembled on the cushion frame 200. Furthermore, the furniture leg rest mechanism 100 of the present invention can move at least to the rear of the cushion frame 200. Figure 1 or Figure 3 The seat can be moved to the retracted position shown, or moved forward from the seat cushion 200. Figure 4 or Figure 7 The extended position is shown; therefore, in the extended position, the furniture footrest mechanism 100 of the present invention can provide a resting place for the user's feet, while in the retracted position, the furniture footrest mechanism 100 of the present invention can be folded into the seat cushion frame 200 for a simpler arrangement.
[0027] Combined Figure 2 , Figure 5 and Figure 6 The furniture footrest mechanism 100 of the present invention includes a front footrest link 10, a rear footrest link 20, a footrest head assembly 30, a first front and rear extension rod 40, a second front and rear extension rod 50, an intermediate connecting assembly 60, and a third front and rear extension rod 70.
[0028] The intermediate connecting component 60 is hinged to the seat frame 200, the lower end 11 of the front footrest link 10, and the lower end 21 of the rear footrest link 20, respectively. This allows the intermediate connecting component 60 to drive the front footrest link 10 and the rear footrest link 20 to move forward or backward relative to the seat frame 200 under the drive of an external power mechanism. At the same time, it also causes the upper end 12 of the front footrest link 10 to swing back and forth relative to the lower end 11 of the front footrest link 10, and the upper end 22 of the rear footrest link 20 to swing back and forth relative to the lower end 21 of the rear footrest link 20.
[0029] The footrest assembly 30 is hinged to the front end 41 of the first front-rear extension rod 40 and the front end 51 of the second front-rear extension rod 50. The rear end 52 of the second front-rear extension rod 50 is hinged to the front end 71 of the third front-rear extension rod 70 located behind the second front-rear extension rod 50. The third front-rear extension rod 70 is hinged rearward to the front footrest link 10 and the rear footrest link 20. The rear end 42 of the first front-rear extension rod 40 is hinged to the front footrest link 10 and the rear footrest link 20, so that the first front-rear extension rod 40, the third front-rear extension rod 70, the front footrest link 10, and the rear footrest link 20 together form a four-bar linkage, as shown in the diagram. Figure 7 As shown; furthermore, the lengths of the first front and rear extension rods 40 are greater than the lengths of the second front and rear extension rods 50 and the third front and rear extension rods 70 (i.e., the lengths of the rods); additionally, in Figure 4 or Figure 7 In the extended position shown, the second front and rear extension rod 50 is inclined at the front-up and rear-down relative to the first front and rear extension rod 40. The included angle α between the second front and rear extension rod 50 and the first front and rear extension rod 40 is greater than 15 degrees and less than 20 degrees. For example, the included angle α is 15.5 degrees, 16 degrees, 16.5 degrees, 17 degrees, 17.5 degrees, 18 degrees, 18.5 degrees, 19 degrees or 19.5 degrees, etc., but is not limited to this.
[0030] Therefore, when the included angle α between the second front-to-back extension rod 50 and the first front-to-back extension rod 40 is greater than 15 degrees and less than 20 degrees, and in conjunction with the design of "a third front-to-back extension rod 70 located behind the second front-to-back extension rod 50, with a rod length less than the first front-to-back extension rod 40 and hinged to the front footrest link 10 and the rear footrest link 20 in sequence, and the rear end 42 of the first front-to-back extension rod 40 being hinged to the front footrest link 10 and the rear footrest link 20 respectively", it is possible to prevent the third front-to-back extension rod 70, which supports the second front-to-back extension rod 40, from being connected to the hinge center line between the third front-to-back extension rod 70 and the front footrest link 10 (i.e., the hinge center line between the third front-to-back extension rod 70 and the front footrest link 10). Figure 7 The hinge center line of the first intermediate hinge structure 13 is centered and swings up and down, thus solving the problem of up-and-down swaying in the furniture leg rest mechanism 100 of the present invention. More specifically, see the description below.
[0031] like Figure 7 As shown, as an example, the rear end 42 of the first front and rear extension rods 40 is hinged to the upper end 12 of the front footrest link 10 and the upper end 22 of the rear footrest link 20, respectively. The front footrest link 10 is provided with a first intermediate hinge structure 13 located between its upper end 12 and lower end 11, and the rear footrest link 20 is provided with a second intermediate hinge structure 23 located between its upper end 22 and lower end 21. At this time, the third front and rear extension rods 70 are hinged rearward to the first intermediate hinge structure 13 and the second intermediate hinge structure 23 in sequence. This design causes the third front and rear extension rods 70 to be offset downwards relative to the first front and rear extension rods 40. Specifically, in conjunction with... Figure 4 , Figure 5 and Figure 7 As an example, the front footrest link 10 has a first outwardly protruding block 14, and a first intermediate hinge structure 13 is located on the first outwardly protruding block 14; the rear footrest link 20 has a second outwardly protruding block 24, and a second intermediate hinge structure 24 is located on the second outwardly protruding block 24; this design can further increase the support strength of both the front footrest link 10 and the rear footrest link 20 for the third front and rear extension rod 70; furthermore, Figure 7 In this example, the width of the first front-to-back extension rod 40 is greater than the widths of the second and third front-to-back extension rods 50 and 70, to ensure that the structural strength of the first front-to-back extension rod 40 is greater than that of the second and third front-to-back extension rods 50 and 70. Furthermore, the length of the second front-to-back extension rod 50 is less than the length of the third front-to-back extension rod 70, so that the support effect of the third front-to-back extension rod 70 on the second front-to-back extension rod 50 can be further improved when the furniture leg support mechanism 100 of the present invention is in the extended position. More specifically, in... Figure 7In this example, the hinge point where the upper end 12 of the front footrest link 10 and the rear end 42 of the first front and rear extension rod 40 are hinged is adjacent to the first intermediate hinge structure 13, and the hinge point where the upper end 12 of the rear footrest link 20 and the rear end 42 of the first front and rear extension rod 40 are hinged is adjacent to the second intermediate hinge structure 23. This design makes the first front and rear extension rod 40 and the third front and rear extension rod 70 more reasonable and compact in the vertical direction; furthermore, Figure 7 In the example, the third front and rear extension bar 70 is a straight bar.
[0032] like Figures 1 to 6 As shown, as an example, the furniture leg rest mechanism 100 of the present invention further includes a limiting guide component 80 mounted on the cushion frame 200. Optionally, the limiting guide component 80 can be mounted at the front end of the cushion frame 200, but is not limited thereto. In this case, the first front and rear extension rod 40 passes through the limiting guide component 80 along the front and rear direction of the cushion frame 200. Therefore, during the switching process between the extended position and the retracted position of the furniture leg rest mechanism 100 of the present invention, the first front and rear extension rod 40 slides along the limiting guide component 80, further improving the smoothness and reliability of the extension and retraction of the furniture leg rest mechanism 100 of the present invention. In addition, the limiting guide component 80 also supports the first front and rear extension rod 40 from below, so as to further improve the stability and reliability of the cushion frame 200 supporting the first front and rear extension rod 80. Specifically, in conjunction with Figure 1 , Figure 2 , Figure 4 and Figure 5 As an example, the limiting guide assembly 80 also prevents the first front and rear extension rod 40 from moving in the left and right directions of the seat frame 200.
[0033] Combination Figures 1 to 7As an example, the intermediate connecting assembly 60 includes a front footrest swing arm 61, a rear footrest swing arm 62, and a first intermediate connecting rod 63 located below the seat cushion frame 200 and extending along the front-rear direction of the seat cushion frame 200. The upper ends 611 of the front footrest swing arm 61 and 621 of the rear footrest swing arm 62 are each hinged to the seat cushion frame 200 to allow the front and rear footrest swing arms 61 and 62 to pivot forward and backward relative to the seat cushion frame 200, respectively. The lower end 612 of the front footrest swing arm 61 is hinged downwards to the lower end 11 of the front footrest connecting rod 10 and the front end 631 of the first intermediate connecting rod 63. The lower end 622 of the rear footrest swing arm 62 is hinged to the lower end 21 of the rear footrest connecting rod 20. The rear end 632 of the first intermediate connecting rod 63 is located above and below the rear footrest connecting rod 20. The positions of 21 are hinged; this design allows the front footrest lever 61, the first intermediate link 63, the rear footrest link 20, the rear footrest lever 62, and the seat cushion frame 200 to form a five-bar linkage. This effectively ensures that the intermediate connecting assembly 60, driven by an external power mechanism, moves the front footrest link 10 and the rear footrest link 20 forward or backward relative to the seat cushion frame 200, while also effectively ensuring that the upper end 12 of the front footrest link 10 swings back and forth relative to the lower end 11, and the upper end 22 of the rear footrest link 20 swings back and forth relative to the lower end 21. Specifically, combined with Figures 1 to 7 As an example, the intermediate connecting assembly 60 also includes a second intermediate link 64 located below the seat cushion 200 and extending along the front-to-back direction of the seat cushion 200. The front end 641 of the second intermediate link 64 is hinged to the front footrest rocker arm 61, and the rear end 642 of the second intermediate link 64 is hinged to the rear footrest rocker arm 62, such that the front footrest rocker arm 61, the second intermediate link 64, the rear footrest rocker arm 62, and the seat cushion 200 together form a four-bar linkage (see...). Figure 6 and Figure 7 (As shown), this four-bar linkage effectively improves the reliability of the intermediate connecting assembly 60 in driving the front footrest link 10 and the rear footrest link 20. More specifically, in Figure 7 As an example, the footrest front swing arm 61 is provided with a first hinge structure 613 for hinged to the seat cushion frame 200 and a second hinge structure 614 for hinged to the second intermediate connecting rod 64 (see...). Figure 6 The second, third, and fourth hinge structures 614, 615, and 616 are arranged sequentially downwards, with the second, third, and fourth hinge structures 614 and 615 respectively. The rear swing arm 62 of the footrest is provided with a fifth hinge structure 623 for hinged to the seat cushion 200, a sixth hinge structure 624 for hinged to the second intermediate link 64, and a seventh hinge structure 625 for hinged to the rear swing arm 20 of the footrest. The sixth and seventh hinge structures 624 and 625 are arranged sequentially downwards. Furthermore, in… Figure 5 In this example, the footrest link 20 is positioned between the first intermediate link 63 and the second intermediate link 64 in the left-right direction along the seat cushion frame 200, so that their arrangement is reasonable and compact.
[0034] Combined Figures 1 to 7 As an example, the footrest assembly 30 includes a first footrest 31 with a first support portion 311, a second footrest 32 with a second support portion 321, and a footrest connecting rod 33. The first footrest 31 has a first hinge structure 312 for hinged to the front end 41 of the first front-rear extension rod 40, a second hinge structure 313 away from the first hinge structure 312, and a third hinge structure 314 located between the first hinge structure 312 and the second hinge structure 313. The second footrest 32 is hinged to the second hinge structure 313, and the first end 331 of the footrest connecting rod 33 is located at position 322 between the second support portion 321 and the second hinge structure 313 (see...). Figure 3 The front end 51 of the second front and rear extension rod 50 is hinged forward to the third hinge structure 314 and the second end 332 of the foot rest connecting rod 33.
[0035] When the furniture leg rest mechanism 100 of the present invention is in Figure 4 or Figure 7 In the extended position shown, the first front-to-back extension rod 40, the second front-to-back extension rod 50, and the third front-to-back extension rod 70 slide out of the seat cushion frame 200, and the first support portion 311 and the second support portion 32 are arranged upwards to meet the user's need for a footrest; when the furniture footrest mechanism 100 of the present invention is in the extended position... Figure 1 or Figure 3 When in the retracted position as shown, the first front-to-back extension rod 40, the second front-to-back extension rod 50, and the third front-to-back extension rod 70 slide back into the seat cushion frame 200, and the first support portion 311 and the second support portion 321 are arranged one in front and one behind, to prevent the first footrest head 31 and the second footrest head 32 from protruding outward from the seat cushion frame 200 in this position. (See diagram). Figure 1 or Figure 3 As shown.
[0036] The working principle of the furniture leg support mechanism 100 of the present invention will be explained with reference to the accompanying drawings: Figure 3 and Figure 7 Based on the benchmark, when it is necessary to... Figure 3 The furniture leg rest mechanism 100 in the retracted position shown switches to... Figure 7In the extended position shown, at this time, while the front footrest lever 61 pivots clockwise upward around the hinge center line of the first hinge structure 613 on the front footrest lever 61, the rear footrest lever 62 is driven by the second intermediate connecting rod 64 to pivot clockwise upward around the hinge center line of the fifth hinge structure 623 in a synchronized manner. This causes the front footrest connecting rod 10, the rear footrest connecting rod 20, the first front and rear extension rods 40, the second front and rear extension rods 50, the third front and rear extension rods 70, the footrest head assembly 30, and the first intermediate connecting rod 63 to move together towards the front of the seat cushion frame 200. During the movement, the first intermediate connecting rod 63 also rotates counterclockwise upward around the hinge center line of the fourth hinge structure 616. The rod 20 rotates counterclockwise downwards around the hinge center line of the seventh hinge structure 625, and the front footrest link 10 rotates counterclockwise downwards around the hinge center line of the third hinge structure 615 thereon. The counterclockwise downward rotation of the rear footrest link 20 and the front footrest link 10 causes the third front-to-back extension rod 70 to move forward relative to the first front-to-back extension rod 40. The forward-moving third front-to-back extension rod 70 causes the second front-to-back extension rod 50 to rotate clockwise, causing the first footrest head 31 to rotate clockwise around the hinge center line of the first hinge structure 312 thereon, and causing the second footrest head 32 to rotate clockwise around the hinge center line of the second hinge structure 313 thereon.
[0037] When the front swing arm 61 and the rear swing arm 62 of the footrest pivot clockwise upwards... Figure 7 When the position shown is reached, the first support portion 311 of the first foot rest 31 and the second support portion 321 of the second foot rest 32 are switched to the upward-facing position, as shown in the diagram. Figure 7 As shown. It should be noted that since the process of the furniture leg support mechanism 100 of the present invention switching from the extended position to the retracted position is exactly the opposite of the process of switching from the retracted position to the extended position, it will not be described again here.
[0038] Compared with the prior art, the invention utilizes the following: "The second front-to-back extension rod 50, when in the extended position, is inclined relative to the first front-to-back extension rod 40 at a forward-upward and backward-downward angle α greater than 15 degrees and less than 20 degrees; a third front-to-back extension rod 70 is located behind the second front-to-back extension rod 50 and is shorter than the first front-to-back extension rod 40, and the third front-to-back extension rod 70 is hinged to the front footrest link 10 and the rear footrest link 20 in sequence; and the rear end 42 of the first front-to-back extension rod 40 is connected to the front footrest link 10 and the rear footrest link 20 respectively." The hinged design of link 20 allows the third front and rear extension rod 70 to be supported by both the front footrest link 10 and the rear footrest link 20. Simultaneously, it forms a four-bar linkage with the first front and rear extension rod 40, the front footrest link 10, and the rear footrest link 20. Furthermore, the support provided by the third front and rear extension rod 70 to the second front and rear extension rod 50, and the support provided by the rear footrest link 20 to the third front and rear extension rod 70, are based on the hinge center line between the third front and rear extension rod 70 and the front footrest link 10 (i.e., the hinge center line). Figure 7 The first intermediate hinge structure 13 generates a lever effect that cancels each other out, thus increasing the support strength of the third front and rear extension rod 70 and the third front and rear extension rod 70 on the second front and rear extension rod 50 and the foot rest assembly 30. This prevents the third front and rear extension rod 70, which supports the second front and rear extension rod 50, from wobbling up and down around the hinge center line between the third front and rear extension rod 70 and the foot rest front connecting rod 10 when the furniture foot rest mechanism 100 of the present invention is in the extended position. Therefore, the furniture foot rest mechanism 100 of the present invention solves the defect of up and down wobbling.
[0039] It should be noted that arrow A in the attached drawings indicates the direction of the seat cushion frame 200 from front to back, and arrow B and its opposite indicate the left-right direction of the seat cushion frame 200. Furthermore, the furniture leg rest mechanism 100 of the present invention is preferably applied to sofas, but it can also be applied to other furniture besides sofas. In addition, in Figure 7 In the extended position shown, the included angle α between the second front and rear extension rod 50 and the first front and rear extension rod 40 refers to the included angle between the second plane P2 and the first plane P1. The first plane P1 is defined by the hinge center line of the first front and rear extension rod 40's front end 41 and the first foot rest 31, and the hinge center line of the first front and rear extension rod 40's rear end 42 and the foot rest front connecting rod 10. The second plane P2 is defined by the hinge center line of the second front and rear extension rod 50's front end 51 and the first foot rest 31, and the hinge center line of the second front and rear extension rod 50's rear end 52 and the third front and rear extension rod 70's front end 71.
[0040] The above-disclosed examples are merely preferred embodiments of the present invention, intended to facilitate understanding and implementation by those skilled in the art. They should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.
Claims
1. A furniture leg rest mechanism, assembled on a seat cushion frame and movable at least rearward to a retracted position or forward to an extended position, comprising a front leg rest link, a rear leg rest link, a leg rest head assembly, a first front-to-back extension rod, a second front-to-back extension rod, and an intermediate connecting assembly hinged to the seat cushion frame, the lower end of the front leg rest link, and the lower end of the rear leg rest link, respectively; the leg rest head assembly is hinged to the front ends of the first front-to-back extension rod and the second front-to-back extension rod, wherein the length of the first front-to-back extension rod is greater than the length of the second front-to-back extension rod, characterized in that... The furniture footrest mechanism further includes a third front-to-back extension rod located behind the second front-to-back extension rod and having a length shorter than the first front-to-back extension rod. The third front-to-back extension rod is hinged to the front footrest link and the rear footrest link in sequence. The front end of the third front-to-back extension rod is hinged to the rear end of the second front-to-back extension rod. The rear ends of the first front-to-back extension rod are respectively hinged to the front footrest link and the rear footrest link. In the extended position, the second front-to-back extension rod is inclined at an angle of front-up and rear-down relative to the first front-to-back extension rod. The angle between the second front-to-back extension rod and the first front-to-back extension rod is greater than 15 degrees and less than 20 degrees.
2. The furniture leg support mechanism according to claim 1, characterized in that, The rear ends of the first front and rear extension rods are respectively hinged to the upper ends of the front footrest link and the rear footrest link; the front footrest link is provided with a first intermediate hinge structure located between the upper and lower ends of the front footrest link, and the rear footrest link is provided with a second intermediate hinge structure located between the upper and lower ends of the rear footrest link; the third front and rear extension rods are hinged to the first intermediate hinge structure and the second intermediate hinge structure in sequence.
3. The furniture leg support mechanism according to claim 2, characterized in that, The front footrest link has a first outward protrusion, and the first intermediate hinge structure is located on the first outward protrusion; the rear footrest link has a second outward protrusion, and the second intermediate hinge structure is located on the second outward protrusion.
4. The furniture leg support mechanism according to claim 1, characterized in that, The width of the first front and rear extension bar is greater than the width of the second and third front and rear extension bars; the length of the second front and rear extension bar is less than the length of the third front and rear extension bar.
5. The furniture leg support mechanism according to claim 1, characterized in that, It also includes a limiting guide assembly mounted on the cushion frame, the first front and rear extension rod passing through the limiting guide assembly in the front-to-back direction of the cushion frame; during the switching of the furniture foot rest mechanism between the extended position and the retracted position, the first front and rear extension rod slides along the limiting guide assembly, and the limiting guide assembly also supports the first front and rear extension rod from below.
6. The furniture leg support mechanism according to claim 1, characterized in that, The footrest assembly includes a first footrest with a first support portion, a second footrest with a second support portion, and a footrest connecting rod. The first footrest has a first hinge structure for hinged to the front end of the first front and rear extension rod, a second hinge structure away from the first hinge structure, and a third hinge structure located between the first hinge structure and the second hinge structure. The second footrest is hinged to the second hinge structure. The first end of the footrest connecting rod is hinged to the second footrest at a position between the second support portion and the second hinge structure. The front end of the second front and rear extension rod is sequentially hinged forward to the third hinge structure and the second end of the footrest connecting rod. In the extended position, the first, second, and third front and rear extension rods slide out of the seat cushion frame, with the first and second support portions facing upwards. In the retracted position, the first, second, and third front and rear extension rods slide back into the seat cushion frame, with the first and second support portions arranged one in front of the other.
7. The furniture leg support mechanism according to claim 1, characterized in that, The intermediate connecting assembly includes a front footrest swing arm, a rear footrest swing arm, and a first intermediate connecting rod located below the seat cushion frame and extending along the front-to-back direction of the seat cushion frame; the upper ends of both the front footrest swing arm and the rear footrest swing arm are hinged to the seat cushion frame, and the lower end of the front footrest swing arm is hinged downwards to the lower end of the front footrest connecting rod and the front end of the first intermediate connecting rod in sequence; the lower end of the rear footrest swing arm is hinged to the lower end of the rear footrest connecting rod, and the rear end of the first intermediate connecting rod is hinged to the rear footrest connecting rod at a position between the upper and lower ends of the rear footrest connecting rod.
8. The furniture leg support mechanism according to claim 7, characterized in that, The intermediate connecting assembly also includes a second intermediate link located below the seat frame and extending along the front-to-back direction of the seat frame. The front end of the second intermediate link is hinged to the front swing arm of the footrest, and the rear end of the second intermediate link is hinged to the rear swing arm of the footrest.
9. The furniture leg support mechanism according to claim 8, characterized in that, The front footrest arm is provided with a first hinge structure for hinged to the seat cushion frame, a second hinge structure for hinged to the second intermediate connecting rod, a third hinge structure for hinged to the front footrest connecting rod, and a fourth hinge structure for hinged to the first intermediate connecting rod. The second, third, and fourth hinge structures are arranged downwardly in a sequence that is spaced apart. The rear footrest arm is provided with a fifth hinge structure for hinged to the seat cushion frame, a sixth hinge structure for hinged to the second intermediate connecting rod, and a seventh hinge structure for hinged to the rear footrest connecting rod. The sixth and seventh hinge structures are arranged downwardly in a sequence that is spaced apart.
10. The furniture leg support mechanism according to claim 8, characterized in that, The footrest rear connecting rod is located between the first intermediate connecting rod and the second intermediate connecting rod in the left-right direction of the seat cushion frame.