CN117898570A - Linkage mechanical device for adjusting foot rest of seat and seat - Google Patents

Abstract

A linkage mechanism for adjusting a seat foot rest, comprising a foot rest and an adjusting unit, wherein the foot rest comprises a central support body; the front end frame body is rotationally connected with the end part of the central frame body, which is far away from the adjusting unit; the rear end frame body is rotationally connected with the end part of the central frame body, which is far away from the front end frame body; and the transmission structure is used for connecting the front end frame body and the rear end frame body, and can drive the rear end frame body/the front end frame body to rotate in opposite directions when the front end frame body/the rear end frame body rotates relative to the central frame body. The leg rest has two states of contraction and extension, and the supporting surface in the expanded state is formed by three continuous planes, so that the supporting surface can be flexibly adjusted according to different sitting postures, the function of supporting the whole leg is realized, the leg rest is more attached to the leg curve, and the comfort is greatly improved; meanwhile, the front end frame body or the rear end frame body can be turned over at will to complete the contraction and the extension of the foot rest, and the foot rest has the advantages of labor saving and simplicity in operation.

Description

Linkage mechanical device for adjusting foot rest of seat and seat

Technical Field

The invention belongs to the technical field of seat accessories, and particularly relates to a linkage mechanical device for adjusting a seat leg rest and a seat.

Background

Seating furniture such as a sofa for seating a person to rest comfortably has many configurations for adjusting the backrest to provide a comfortable seating angle, while for leg and foot comfort improvement, the foot needs to be held up by a footrest or the like, which is more convenient for further improving the comfort of the home such as the sofa.

The utility model discloses a manual type footrest mechanism and seat of authorized bulletin number CN219835403U, wherein manual type footrest mechanism includes hanger rail, pendant, receive and release subassembly and regulating part, the pendant movably install in the hanger rail, along the hanger rail removes, receive and release subassembly rotatably with the pendant is connected, the regulating part install in receive and release subassembly is last, when receive and release subassembly is in the shrink state, receive and release subassembly along with the pendant removes along the hanger rail, the hanger rail has a receive and release position, when the pendant removes to the receive and release position of hanger rail, receive and release subassembly rotatable to the expansion state, the regulating part stretches out, receive and release subassembly prop up the regulating part, the pendant in the receive and release position locking of hanger rail. The device can be used for unfolding the foot rest when needed so that a user can sit on the seat for foot rest, and the foot rest can be folded when not needed.

But this device also has the following drawbacks: the device can only support the foot, lacks the support to the shank, even widen the holding surface of support piece and be used for supporting the shank, also do not laminate human shank curve, the travelling comfort is not good.

Disclosure of Invention

Aiming at the problems, one of the purposes of the invention is to provide a linkage mechanical device for adjusting the foot rest of a seat, which is characterized in that the foot rest is provided with a contraction state and an extension state through the arrangement of a central frame body, a front end frame body, a rear end frame body and a transmission structure, a supporting surface in the extension state is formed by three continuous planes, and the angle between two adjacent planes can be adjusted steplessly, so that the supporting surface can be adjusted flexibly according to different sitting postures, the function of supporting the legs of the whole human body is realized, the supporting surface is more attached to the leg curves, and the comfort is greatly improved; meanwhile, the front end frame body or the rear end frame body can be turned over at will to complete the contraction and the extension of the foot rest, and the foot rest has the advantages of labor saving and simplicity in operation.

In order to achieve the above object, the technical scheme of the present invention is as follows:

A linkage mechanism for seat footrest adjustment, comprising a footrest and an adjustment unit for extending and retracting the footrest, the footrest comprising: the central frame body is connected with the adjusting unit; the end part of the front end frame body is rotationally connected with the end part of the central frame body, which is far away from the adjusting unit; the end part of the rear end frame body is rotationally connected with the end part of the central frame body far away from the front end frame body; the transmission structure is used for connecting the front end frame body and the rear end frame body, and when the front end frame body/the rear end frame body rotates relative to the central frame body, the transmission structure can drive the rear end frame body/the front end frame body to rotate in opposite directions relative to the central frame body.

As a further preferable aspect of the present invention, the rotation angle of the rear end frame/front end frame with respect to the center frame is 120 to 180 °.

As a further preferred aspect of the present invention, the transmission structure includes: the two ends of the transmission main rod are respectively and rotatably connected with the front end frame body and the rear end frame body, and the two connecting positions of the transmission main rod, which are rotatably connected with the front end frame body and the rear end frame body, are respectively provided with a first connecting column arranged on the transmission main rod and a strip-shaped groove which is arranged on the front end frame body/the rear end frame body and used for penetrating through the first connecting column; the first connecting rod is close to the front end frame body, and two ends of the first connecting rod are respectively and rotatably connected with the central frame body and the transmission main rod; the second connecting rod is close to the rear end frame body, and two ends of the second connecting rod are respectively connected with the central frame body and the transmission main rod in a rotating way; the rotation direction of the first connecting rod is the same as that of the second connecting rod.

As a further preferred aspect of the present invention, the rotational connection between the transmission main lever and the rear end frame is achieved by rotationally connecting the transmission main lever or fixedly connecting the transmission main lever to the second link lever via a first bending plate having the first connecting post at an end portion.

As a further preferable aspect of the present invention, a second bending plate is provided between the rear end frame and the central frame; one end of the second bending plate is rotationally connected with the rear end frame body, and the other end of the second bending plate is rotationally connected with the central frame body.

As a further preferred aspect of the present invention, the second bending plate is connected to the middle portion of the first bending plate through a rotation shaft to form a first connection point.

As a further preferred aspect of the present invention, the adjusting unit is rotatably connected to an end of the central frame body near the front end frame body to form a second connection point.

As a further preferable aspect of the present invention, the transmission main lever is provided with an arc-shaped guide groove, and the adjusting unit is provided with a second connecting column slidably connected with the arc-shaped guide groove.

As a further preferred aspect of the present invention, the center frame, the front end frame, the rear end frame, and the transmission structure are all provided in pairs, and the adjusting unit has a chassis for connecting the two center frames.

As a further preferred aspect of the present invention, support plates having the same arrangement direction as the mounting direction of the bottom frame are provided between the two front end frames and the two rear end frames.

Another object of the invention is to provide a seating furniture having any of the above mentioned linkage mechanisms.

In summary, the invention has the following beneficial effects:

The connecting angles of the front end frame body or the rear end frame body and the central frame body can be adjusted by applying force, so that the unfolding structure can form a continuous plane and also can form a continuous folding surface, three independent supporting surfaces can independently support different positions of legs, and leg curves can be attached under different sitting postures, thereby greatly improving the supporting area and supporting strength, and greatly improving the comfort compared with the prior art

Drawings

Fig. 1 is a schematic structural view of the present invention in a top view.

Fig. 2 is a schematic view of the structure of the present invention at a main viewing angle.

Fig. 3 is a schematic view of the structure of the present invention in a bottom view.

Fig. 4 is a schematic view of a partial structure of the present invention at a main viewing angle.

Fig. 5 is a schematic diagram of the linkage of the present invention.

Fig. 6 is a schematic view of a partial structure of the present invention.

Description of the drawings: a footrest 1, an adjustment unit 2;

the central frame body 10, the front end frame body 11, the rear end frame body 12, the transmission structure 13, the supporting plate 14 and the flat plate 15;

a transmission main rod 131, a first connecting rod 132, a second connecting rod 133, a first bending plate 134, a second bending plate 135 and a first connecting point 136;

A first connecting post 1311, a bar-shaped groove 1312, and an arcuate guide slot 1313;

A second connection point 201, a second connection post 202, and a chassis 203.

Detailed Description

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless explicitly stated and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection: can be mechanically or electrically connected: can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Example 1

The linkage mechanical device that this embodiment provided for a seat bracket was adjusted, including footrest 1 and be used for stretching out and retrieving the adjusting unit 2 of footrest 1, footrest 1 includes:

a central frame 10 connected to the adjusting unit 2;

a front end frame 11, wherein the end of the front end frame 11 is rotatably connected with the end of the central frame 10 away from the adjusting unit 2;

A rear end frame 12, wherein an end of the rear end frame 12 is rotatably connected with an end of the central frame 10 away from the front end frame 11; the transmission structure 13 is used for connecting the front end frame 11 and the rear end frame, and when the front end frame 11/the rear end frame 12 rotates relative to the central frame 10, the transmission structure 13 can drive the rear end frame 12/the front end frame 11 to rotate in opposite directions relative to the central frame 10. The rotation angle of the rear end frame body/the front end frame body relative to the central frame body is 120-180 degrees.

The front end frame 11, the central frame 10, and the rear end frame 12 are sequentially distributed along a first direction N, and are all arranged in pairs with the transmission structure 13, the adjusting unit 2 has an underframe 203, the underframe 203 is arranged along a second direction M, the second direction M is perpendicular to the first direction N, and two structures of each pair of front end frame 11, the central frame 10, the rear end frame 12, and the transmission structure 13 are arranged in parallel along a second direction M.

The support plates 14 having the same arrangement direction as the mounting direction of the bottom frame 203 (i.e., the second direction M) are disposed between the two front end frames 11 and the two rear end frames 12. Similarly, flat plates distributed along the second direction M are also disposed between the two central frame bodies 10, and the flat plates are located at the upper ends of the bottom frames 203 (i.e., the bottom frames 203 are connected to the lower ends of the central frame bodies 10, and the flat plates are connected to the upper ends of the same ends of the central frame bodies 10). The two support plates 14 are provided with soft packages forming a front support surface and a rear support surface, and the flat plate 15 is provided with a soft package forming a central support surface.

It can be understood that the "adjusting unit 2 for extending and retracting the footrest 1" refers to a structure that one end is mounted on a surface of the seat facing away from the seat surface, and the other end has a telescopic function, and the structure is a structure that is conventionally used by a person skilled in the art, such as a "hanger rail" and a "hanging piece" disclosed in an authorized publication number CN219835403U, and may also be a "driving component" disclosed in an application publication number CN116391986, so that the present embodiment is not repeated.

In the linkage mechanical device provided by the invention, the foot rest unit has two states of contraction and extension.

In the contracted state: the front end frame 11 or the rear end frame 12 are acted on and turned over, or both are turned over simultaneously, the transmission structure 13 drives the front end frame 11 and the rear end frame 12 to rotate in opposite directions by taking two ends of the central frame 10 as rotation points respectively, and finally a three-stack structure of the front end frame 11 turned over to the lower end of the central frame 10 and the rear end frame 12 turned over to the upper end of the central frame 10 is obtained, and the structure is similar to a sandwich structure of hamburger. The three-fold structure is contracted to the back of the sitting surface of the seat by the adjusting unit 2 to complete hiding.

In the extended state: the adjusting unit 2 pulls out the three-fold structure from the back of the sitting surface of the seat, then acts on and overturns any one of the front end frame 11 or the rear end frame 12 or overturns both simultaneously, the transmission structure 13 drives the front end frame 11 and the rear end frame 12 to rotate in opposite directions by taking the two ends of the central frame 10 as rotation points respectively, finally, an unfolding structure that the front end frame 11 overturns to the front end of the central frame 10 and the rear end frame 12 overturns to the rear end of the central frame 10 is obtained, and as the front end frame 11 and the rear end frame 12 are rotationally connected with the central frame 10, the connecting angle between the front end frame 11 or the rear end frame 12 and the central frame 10 can be adjusted, so that the unfolding structure can form a continuous plane, a continuous folded surface can be formed, three independent supporting surfaces can independently support different positions of legs, leg curves can be attached under the condition of different sitting postures, the supporting surface and supporting strength are greatly improved, and compared with the comfort of the prior art.

Example 2

This embodiment further refines the transmission structure 13 compared to embodiment 1, and the transmission structure 13 includes:

the two ends of the transmission main rod 131 are respectively and rotatably connected with the front end frame 11 and the rear end frame 12, and two connecting positions of the transmission main rod 131 and the front end frame 11 and the rear end frame 12 are respectively provided with a first connecting column 1311 arranged on the transmission main rod 131 and a strip-shaped groove 1312 arranged on the front end frame 11/the rear end frame 12 and used for penetrating through the first connecting column 1311;

The first connecting rod 132, the first connecting rod 132 is close to the front end frame 11, and two ends of the first connecting rod are respectively connected with the central frame 10 and the transmission main rod 131 in a rotating way;

The second connecting rod 133, the second connecting rod 133 is close to the rear end frame 12, and two ends of the second connecting rod are respectively connected with the central frame 10 and the transmission main rod 131 in a rotating way; the first link 132 and the second link 133 rotate in the same direction.

It should be noted that, a straight line formed by connecting the two connection points (a, B) of the first link 132 and a straight line formed by connecting the two connection points (C, D) of the second link 133 are parallel; the straight line formed by connecting the connection point (a) of the first link 132 on the central frame body 10 with the connection point (C) of the second link 133 on the central frame body 10 and the straight line formed by connecting the connection point (B) of the first link 132 on the transmission main rod 131 with the connection point (D) of the second link 133 on the transmission main rod 131 are parallel. Therefore, the portion of the connection main lever 131 and the portion of the central frame body 10 form a parallelogram structure by the first link 132 and the second link 133, and when a force acts on the connection main lever 131, the connection main lever 131 swings with respect to the central frame body 10. When the connecting main lever 131 swings, the end portions thereof act on the front end frame 11 and the rear end frame 12, and the front end frame 11 and the rear end frame 12 are rotated at the connection point rotationally connected with the center frame 10, thereby achieving the technical effect of linkage. The sliding connection between the first connecting post 1311 and the bar slot 1312 is used for avoiding the problem that the front end frame 10 and the rear end frame 12 are interfered by the transmission main rod 131 and cannot rotate.

As a further preferred embodiment, the rotary connection of the transmission main rod 131 and the rear end frame body 12 is achieved by a first bending plate 134 having the first connecting post 1311 at an end thereof being rotatably connected to the transmission main rod 131 or directly connected to the second connecting rod 133. In this embodiment, the first bending plate 134 is preferably connected to the second link 133, more preferably, the first bending plate 134 and the second link 133 are integrally formed, and a portion of the first bending plate 134 has a structure similar to a C-type or U-type, which has the advantage of reducing the connection structure at the transmission main rod 131, avoiding interference between the structures, affecting the movement and overturning of the structure, and strengthening the connection strength.

Example 3

The present embodiment further optimizes the driving structure 13 based on embodiment 2, specifically includes:

A second bending plate 135 is disposed between the rear end frame 12 and the central frame 10; the second bending plate 135 has one end connected to the rear end frame 12 and the other end rotatably connected to the central frame 10. The second bending plate 135 is generally similar to a U-shape, and is configured to avoid the connection structure between the connecting main rod 131 and the rear end frame 12 from interfering with the overturning of the rear end frame 12, so as to provide a sufficient rotation space.

It should be noted that, in the transmission structure 13 in embodiment 2, when the rear end frame 12 needs to be actively turned to drive the front end frame 11 to move, the situation that the rear end frame 12 rotates by a certain angle alone and then continues to turn to drive the front end frame 11 to turn occurs, and this occurs because the rear end frame 12 needs to rotate alone to complete the "invalid path" of the first bending plate 134 itself due to the special shape similar to the C-shape or the U-shape before the first bending plate 134 plays a role of driving the second link 133 to drive the connecting main rod 131 to "swing".

Therefore, the second bending plate 135 is added in this embodiment, compared with embodiment 2, the optimization is that: the so-called 'invalid path' is shortened or even eliminated, namely the front end frame 11 can be directly driven to synchronously overturn by actively overturning the rear end frame 12, and the response sensitivity of the linkage structure is improved.

As a further preferred embodiment, the second bending plate 135 is connected to the middle portion of the first bending plate 134 through a rotation shaft to form a first connection point 136. The reason for this is that the rear end frame 12 has a greater weight due to the supporting thigh, the scissors-like structure formed by the second bending plate 135 and the first bending plate 134 can disperse the ends of the scissors, especially the gravity applied to the connection of the transmission main rod 131 and the central frame 10, so that the structural strength and the supporting stability of the whole structure are improved, and the scissors-like structure forms a labor-saving lever, so that the rear end frame 12 can be turned more labor-effectively and smoothly.

As a further preferred embodiment, the adjusting unit 2 is rotatably connected to the end of the central frame body 10 near the front end frame body 11 to form a second connection point 201. The advantage of setting up like this is that for central support body 10 has angle of adjustment's function to the angle adjustment of central support body 10 is gone on along with the position change of transmission structure 13 relative central support body 10, need not alone to adjust, makes central support body 10 have the contained angle with the plane that the seating surface is located when extending the state, and central support body 10 slope is located the front lower extreme of seating surface, and the rear end support body 12 other end is direct with the surface butt that deviates from the seating surface, forms one and is connected and laminate shank curved holding surface more with the seating surface, has further improved the travelling comfort.

As a further preferable aspect of this embodiment, the transmission main rod 131 is provided with an arc-shaped guide slot 1313, and the adjusting unit 2 is provided with a second connecting post 202 slidably connected to the arc-shaped guide slot. The main purpose of setting like this is to improve the stability of transmission mobile jib 131 motion, and then improves the support strength and the stability of whole foot rest structure.

As a further preferred aspect of this embodiment, the surface of the rear end frame 12 far away from the soft bag is provided with an anti-slip groove, the anti-slip groove is used when the leg rest is in a contracted state, at this time, the leg rest is in a three-fold structure, the adjusting unit 2 pulls out the three-fold structure from the back of the sitting surface of the seat, the surface of the rear end frame 12 far away from the soft bag is parallel to or slightly lower than the sitting surface, thereby forming an extension surface of the sitting surface, the extension surface is used as a foot rest surface, and the anti-slip groove is suitable for sitting postures when the leg rest is bent by a human body, and is used for the leg rest to avoid slipping.

Example 4

The embodiment provides an office chair, wherein the linkage mechanical device of any one of embodiments 1 to 3 is arranged on the back surface of the sitting surface.

Example 5

The embodiment provides a sofa, wherein the linkage mechanical device is arranged on the back surface of the sitting surface.

In some preferred embodiments, an automobile seat is provided with the linkage mechanism of any one of embodiments 1-3 on the back of the seating surface.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. Linkage mechanism for the adjustment of a seat footrest, characterized in that it comprises a footrest (1) and an adjustment unit (2) for extending and retracting the footrest (1), the footrest (1) comprising:

A central frame (10) connected to the adjustment unit (2);

A front end frame (11), the end of the front end frame (11) is far away from the central frame (10)

The end part of the adjusting unit (2) is rotationally connected;

The rear end frame body (12), the end part of the rear end frame body (12) is rotationally connected with the end part of the central frame body (10) far away from the front end frame body (11);

The transmission structure (13), transmission structure (13) are used for connecting front end support body (11) and rear end support body, and when front end support body (11)/rear end support body (12) rotate for central support body (10), transmission structure (13) can drive rear end support body (12)/front end support body (11) to carry out the rotation opposite to central support body (10) direction.

2. A linkage mechanism for the adjustment of a seat foot rest according to claim 1, characterized in that said transmission structure (13) comprises:

The two ends of the transmission main rod (131) are respectively and rotatably connected with the front end frame body (11) and the rear end frame body (12), and the connection parts of the transmission main rod (131) and the front end frame body (11) and the rear end frame body (12) which are rotatably connected are respectively provided with a first connecting column (1311) arranged on the transmission main rod (131) and a strip-shaped groove (1312) which is arranged on the front end frame body (11)/the rear end frame body (12) and used for penetrating through the first connecting column (1311);

the first connecting rod (132), the first connecting rod (132) is close to the front end frame body (11) and two ends of the first connecting rod are respectively connected with the central frame body (10) and the transmission main rod (131) in a rotating way;

the second connecting rod (133), the second connecting rod (133) is close to the rear end frame body (12) and two ends of the second connecting rod are respectively connected with the central frame body (10) and the transmission main rod (131) in a rotating way;

The first link (132) and the second link (133) rotate in the same direction.

3. A linkage mechanism for adjusting a seat leg rest according to claim 2, wherein the rotational connection of the transmission main lever (131) and the rear end frame body (12) is achieved by a second bending plate (134) having the first connecting post (1311) at an end thereof being rotationally connected with the transmission main lever (131) or fixedly connected with the second connecting rod (133).

4. A linkage mechanism for adjusting a seat leg rest according to claim 3, characterized in that a second bending plate (135) is provided between the rear end frame (12) and the central frame (10); one end of the second bending plate (135) is rotatably connected with the rear end frame body (12), and the other end of the second bending plate is rotatably connected with the central frame body (10).

5. A linkage mechanism for adjusting a seat leg rest according to claim 4, wherein the second bending plate (135) is connected to the middle part of the first bending plate (134) by a rotation shaft to form a first connection point (136).

6. A linkage mechanism for adjusting a seat leg rest according to any one of claims 2 or 3, wherein the adjusting unit (2) is rotatably connected to the central frame (10) at an end thereof adjacent to the front end frame (11) to form a second connection point (201).

7. A linkage mechanism for adjusting a seat leg rest according to claim 2, characterized in that the transmission main rod (131) is provided with an arc-shaped guide groove (1313), and the adjusting unit (2) is provided with a second connecting column (202) in sliding connection with the arc-shaped guide groove (1313).

8. A linkage mechanism for adjustment of a seat footrests according to claim 1, characterized in that the central frame (10), the front end frame (11), the rear end frame (12), the transmission structure (13) are all arranged in pairs, and the adjustment unit (2) has a chassis (203) for connecting two of the central frames (10).

9. The linkage mechanical device for adjusting the foot rest of the seat according to claim 8, characterized in that a supporting plate (14) with the same arrangement direction as the installation direction of the underframe (203) is arranged between the two front end frame bodies (11) and the two rear end frame bodies (12).

10. A seat comprising a linkage mechanism as claimed in any one of claims 1 to 5 and 7 to 9.