Extended leg mechanism and functional iron stand adopting extended leg mechanism

Abstract

The utility model discloses an extended leg mechanism and a functional iron stand adopting the extended leg mechanism. The extension type 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 front end of the second leg connecting rod is in pivot joint with a fourth leg connecting rod, the rear portion of the fourth leg connecting rod is in pivot joint with the front portion of the first leg connecting rod, and the front ends of the third leg connecting rod and the fourth leg connecting rod are in pivot joint with the same large footrest installation piece. A fifth leg connecting rod and a sixth leg connecting rod are pivoted to the front portion of the large footrest installation piece, the front ends of the fifth leg connecting rod and the sixth leg connecting rod are pivoted to the same small footrest installation piece, the fifth leg connecting rod, the sixth leg connecting rod, the large footrest installation piece and the small footrest installation piece form a quadrilateral structure, the sixth leg connecting rod is pivoted to a seventh leg connecting rod, and the rear end of the seventh leg connecting rod is pivoted to the third leg connecting rod. The utility model solves the problem in the prior art that the whole aesthetic degree of the functional sofa is influenced due to an abutted seam between a plate mounted on a large foot rest and a plate mounted on a small foot rest in a folded state.

Description

Technical Field

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

[0002] The existing Chinese utility model patent with publication number CN218738037U and titled "A Leg Extension and Lengthening Functional Iron Frame" discloses a leg mechanism including a large footrest, the middle part of the large footrest is pivotally connected to leg link 1, the middle part of leg link 1 is pivotally connected to leg link 2, the other end of leg link 2 is pivotally connected to a small footrest, the other end of leg link 1 is pivotally connected to leg link 3, the other end of leg link 3 is pivotally connected to leg link 4, one end of leg link 4 is pivotally connected to the small footrest, and the other end is pivotally connected to leg link 5, the tail of the large footrest is pivotally connected to leg link 6, the middle part of leg link 6 is pivotally connected to leg link 2, the other end of leg link 6 is pivotally connected to leg link 7, and the front part of leg link 7 is pivotally connected to leg link 4. Figure 6 and 7 When the leg mechanism is folded, the large and small footrests are flush. At this time, there is a seam between the panels installed on the large footrest and the panels installed on the small footrest, which affects the overall aesthetics of the functional sofa. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an extended leg mechanism that can improve the overall aesthetics of a functional sofa.

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

[0005] An extended leg mechanism includes a leg link one and a leg link two, the front end of the leg link one is pivotally connected to the leg link three, the front end of the leg link two is pivotally connected to the leg link four, the rear end of the leg link four is pivotally connected to the front of the leg link one, the front ends of the leg links three and four are pivotally connected to the same large footrest mounting piece, the front end of the large footrest mounting piece is pivotally connected to the leg link five and the leg link six, the front ends of the leg links five and six are pivotally connected to the same small footrest mounting piece, the leg links five and six and the large and small footrest mounting pieces form a quadrilateral structure, the leg link six is pivotally connected to the leg link seven, and the rear end of the leg link seven is pivotally connected to the leg link three.

[0006] Preferably, a first limit pin is provided on the front side of the large footrest mounting member, a first limit surface is provided on the leg link 5 to cooperate with the first limit pin, and a second limit surface is provided on the leg link 6 to cooperate with the first limit pin. The first limit pin limits the extreme position of the quadrilateral structure when it is expanded or collapsed. Alternatively, a limit hole can be provided on the large footrest mounting member to limit the range of motion of the pivot axis between the leg link 6 and the leg link 7, replacing the function of the first limit pin.

[0007] Preferably, the large footrest mounting piece is provided with an avoidance hole, which leaves room for movement for the pivot shaft between the leg connecting rod six and the leg connecting rod seven.

[0008] Preferably, a second limiting pin is provided on the front side of the leg connecting rod 1, and a third limiting surface and a fourth limiting surface cooperating with the second limiting pin are provided on the leg connecting rod 4.

[0009] To achieve the above-mentioned purpose, the technical solution adopted by the functional iron frame adopting the extended leg mechanism of the present invention is:

[0010] The saddle stitching mechanism is pivotally connected to the front of the base and to the rear of the base, and the saddle stitching mechanism is pivotally connected to the front of the base and to the rear of the base, and the saddle stitching mechanism is pivotally connected to the front of the base and to the rear of the base.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] When the quadrilateral structure composed of leg links five and six and the large and small footrest mounting parts is flipped downward, leg link seven pushes the rear end of leg link six, forcing the quadrilateral structure to fold and flip the small footrest mounting part to the rear side of the large footrest mounting part, that is, the auxiliary footboard installed on the small footrest mounting part is hidden behind the main footboard installed on the large footrest mounting part, and the entire main footboard faces outward to cover the internal structure of the sofa, which is more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the extended leg mechanism of the present invention in the unfolded state.

[0014] Figure 2It is a schematic diagram of the extended leg mechanism of the present invention in a folded state.

[0015] Figure 3 It is a schematic diagram of the lying state of the functional iron frame adopting the extended leg mechanism of the present invention.

[0016] Figure 4 It is a front view of the extension assembly in a lying position.

[0017] Figure 5 is a back view of the extension assembly in a lying position.

[0018] Figure 6 It is a schematic diagram of the sitting posture of the functional iron frame adopting the extended leg mechanism of the present invention.

[0019] Figure 7 yes Figure 6 AA cross-sectional view.

[0020] Among them, 1 extended leg mechanism, 11 leg connecting rod one, 111 second limiting pin, 12 leg connecting rod two, 13 leg connecting rod three, 14 leg connecting rod four, 141 third limiting surface, 142 fourth limiting surface, 15 large footrest mounting part, 151 first limiting pin, 152 avoidance hole, 16 leg connecting rod five, 161 first limiting surface, 17 leg connecting rod six, 171 second limiting surface, 18 small footrest mounting part, 19 leg connecting rod seven, 2 base, 3 seat mechanism, 31 front mounting part, 32 rear mounting part, 33 front rotating part one, 34 assembly side panel, 35 front rotating part two, 36 middle rotating part, 37 front support rod, 38 rear rotating part, 39 side connecting rod, 4 backrest mechanism, 41 backrest mounting plate, 42 rear support rod, 5 auxiliary footboard, 6 main footboard. DETAILED DESCRIPTION

[0021] The present invention is further illustrated 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, modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0022] like Figure 1-2As shown, an extended leg mechanism 1 includes a leg link 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 front end of the leg link 2 is pivotally connected to the leg link 4 14, the front side of the leg link 1 is installed with a second limiting pin 111, the leg link 4 is provided with a third limiting surface 141 and a fourth limiting surface 142 that cooperate with the second limiting pin, the rear part of the leg link 4 is pivotally connected to the front part of the leg link 1, the front ends of the leg links 3 and 4 are pivotally connected to the same large footrest mounting piece 15, the front end of the large footrest mounting piece is pivotally connected to the leg link 5 16 and the leg link 6 17, the front ends of the leg links 5 and 6 are pivotally connected to the same small footrest mounting piece 18, the leg links 5, 6 and the large and small footrest mounting pieces constitute It forms a quadrilateral structure, a first limit pin 151 is installed on the front side of the large footrest mounting piece, the leg link five is provided with a first limit surface 161 which cooperates with the first limit pin, the leg link six is provided with a second limit surface 171 which cooperates with the first limit pin, and the large footrest mounting piece is provided with an avoidance hole 152, which leaves room for movement for the pivot axis between the leg link six and the leg link seven, the leg link six is pivotally connected to the leg link seven 19, and the rear end of the leg link seven is pivotally connected to the leg link three. The avoidance hole is provided on the large footrest mounting piece to simplify the structure of the leg link six, that is, the leg link six does not need to bend out of a step to avoid the large footrest mounting piece, and also reduces the height difference between the two pivot planes of the leg link seven, thereby ensuring the strength of the leg link seven.

[0023] The specific working process and principle of the extended leg mechanism of the present invention are as follows: when it needs to be unfolded, the leg link two is driven to flip outward, the leg link two drives the leg link four to extend obliquely upward, the leg link four drives the leg link one to flip outward, the leg link one drives the leg link three to extend obliquely upward, and the leg link three and the leg link four drive the large footrest mounting piece to extend obliquely upward. At the same time, under the action of the leg link four, the large footrest mounting piece flips upward around the pivot axis with the leg link three. At the same time, the quadrilateral structure composed of the large and small footrest mounting pieces and the leg links five and six flips, and the leg link six is restricted by the leg link seven to rotate outward around the pivot axis with the large footrest mounting piece, forcing the quadrilateral structure to unfold and the small footrest mounting piece to extend toward the large footrest. The front side of the footrest mounting piece is rotated until the second limit surface hits the first limit pin to prevent the small footrest mounting piece from flipping over at a large angle and affecting the user's comfort when using it. At the same time, the fourth limit surface hits the second limit pin, and the large footrest mounting piece bears the weight of the user's legs. The second limit pin prevents the rotation of the leg link four caused by pressure, thereby increasing the supporting force of the large footrest mounting piece. When it needs to be folded, the operation is reversed, and the leg link seven forces the leg link six to rotate inward around the pivot axis between it and the large footrest mounting piece until the first limit surface hits the first limit pin to prevent the leg link five from rotating too much and affecting the deployment of the small footrest mounting piece. At the same time, the third limit surface hits the second limit pin, and the second limit pin limits the extreme position of the retraction of the leg link four to prevent the leg link four from retracting excessively and affecting its forward extension.

[0024] like Figure 3-7 As shown, a functional iron frame using an extended leg mechanism includes a base 2, and seat mechanisms 3 are installed on both sides of the base. The seat mechanism includes a front mounting member 31 and a rear mounting member 32. One end of the front mounting member is pivotally connected to the front portion of the base, and the other end is pivotally connected to a front rotating member 1 33. The other end of the front rotating member 1 is pivotally connected to an assembly side plate 34. The middle of the front mounting member is pivotally connected to a front rotating member 2 35. The other end of the front rotating member 2 is pivotally connected to an intermediate rotating member 36. The middle of the intermediate rotating member is pivotally connected to the assembly side plate. The other end of the intermediate rotating member is pivotally connected to a front support rod 37. One end of the rear mounting member is pivotally connected to the rear portion of the base, and the other end is pivotally connected to the rear rotating member 38. The rear rotating member is pivotally connected to the assembly side panel, and the rear rotating member is pivotally connected to the side connecting rod 39. The other end of the side connecting rod is pivotally connected to the middle part of the front rotating member 1. The rear side of the assembly side panel is installed with a backrest mechanism 4. The backrest mechanism includes a backrest mounting plate 41 pivotally connected to the tail end of the assembly side panel, and the backrest mounting plate is pivotally connected to the rear support rod 42. The bottom end of the rear support rod is pivotally connected to the rear rotating member. The front side of the assembly side panel is installed with an extended leg mechanism, specifically, leg connecting rod 1 and leg connecting rod 2 are pivotally connected to the front side of the assembly side panel, and the rear part of the leg connecting rod 2 is pivotally connected to the front end of the front support rod. The extended leg mechanism, seat mechanism, and backrest mechanism constitute an extension assembly.

[0025] The functional iron frame adopts an extended leg mechanism to realize the conversion of sitting posture, TV posture and lying posture through a driving mechanism. The specific process can refer to the existing technology with publication number CN218738037U.

[0026] The utility model constructs a quadrilateral structure consisting of leg connecting rods 5 and 6 and large and small footrest mounting members on the front side of the large footrest mounting member, and realizes linkage through leg connecting rod 7. When the extended leg mechanism is unfolded, the auxiliary footboard 5 is supported on the front side of the main footboard 6 to meet the usage requirements of users with tall height and long legs. When the extended leg mechanism is folded, the auxiliary footboard is hidden behind the main footboard, and the internal mechanism of the sofa is covered with the whole main footboard, thereby improving the aesthetics.

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 front end of the leg link 2 is pivotally connected to the leg link 4, the rear end of the leg link 4 is pivotally connected to the front end of the leg link 1, and the front ends of the leg links 3 and 4 are pivotally connected to the same large footrest mounting member, characterized in that: The front part of the large footrest mounting component is pivotally connected to the leg link five and the leg link six, the front ends of the leg links five and six are pivotally connected to the same small footrest mounting component, the leg links five and six and the large and small footrest mounting components form a quadrilateral structure, the leg link six is pivotally connected to the leg link seven, and the rear end of the leg link seven is pivotally connected to the leg link three.

2. The extended leg mechanism according to claim 1, characterized in that: A first limiting pin is provided on the front side of the large footrest mounting piece, the leg connecting rod five is provided with a first limiting surface that cooperates with the first limiting pin, and the leg connecting rod six is provided with a second limiting surface that cooperates with the first limiting pin.

3. The extended leg mechanism according to claim 2, characterized in that: The large footrest mounting piece is provided with an avoidance hole, which leaves room for movement for the pivot shaft between the leg connecting rod six and the leg connecting rod seven.

4. The extended leg mechanism according to claim 1, characterized in that: The front side of the leg connecting rod 1 is provided with a second limiting pin, and the leg connecting rod 4 is provided with a third limiting surface and a fourth limiting surface that cooperate with the second limiting pin.

5. A functional iron frame using the extended leg mechanism as described in any one of claims 1 to 4, comprising a base, a seat mechanism provided on both sides of the base, the seat mechanism comprising a front mounting member and a rear mounting member, one end of the front mounting member being pivotally connected to the front portion of the base, the other end being pivotally connected to a front rotating member 1, the other end of the front rotating member 1 being pivotally connected to an assembly side panel, the middle of the front mounting member being pivotally connected to a front rotating member 2, the other end of the front rotating member 2 being pivotally connected to an intermediate rotating member, the middle of the intermediate rotating member being pivotally connected to the assembly side panel, the other end of the intermediate rotating member being pivotally connected to a front support rod, one end of the rear mounting member being pivotally connected to the rear portion of the base, the other end being pivotally connected to a rear rotating member, the rear rotating member being pivotally connected to the assembly side panel, the rear rotating member being pivotally connected to a side connecting rod member, the other end of the side connecting rod member being pivotally connected to the middle of the front rotating member 1, and a backrest mechanism being provided on the rear side of the assembly side panel, characterized in that: An extended leg mechanism is installed on the front side of the assembly side panel.

Images