Automatic adjusting leg support for sofa chair

Abstract

The utility model discloses an automatic adjusting leg support for a sofa chair, which comprises a bottom frame and a linear driving device, the front end of the bottom frame is provided with a swinging leg support seat, the two sides of the leg support seat are provided with inner side chaining groups, the two sides of the inner side chaining groups are provided with outer side chaining groups, and the outer side chaining groups are provided with inner side chaining groups and outer side chaining groups. A connecting rod is arranged between the driving end of the linear driving device and the middle of the leg bracket, the two ends of the connecting rod are connected with the driving end and the leg bracket in a pivoted mode respectively, and the linear driving device can drive the connecting rod to drive the leg bracket to be switched between the position flush with the bottom frame and the position where the leg bracket is overturned to the lower wall of the bottom frame. Through the arrangement of the inner side linking group and the outer side linking group, a vacant structure is avoided between the base and the leg bracket, so that support is generated between the sofa and the leg bracket, and the cushion body is convenient to mount; and the swing angle between the leg bracket and the bottom frame is larger and can reach about 180 degrees, so that the leg bracket can be hidden when not in use.

Description

Technical Field

[0001] The utility model relates to the field of sofa chairs, in particular to an automatically adjustable leg support for sofa chairs. Background Art

[0002] Existing sofa chairs are generally provided with leg rests to support the legs, but the existing sofa chairs have the following problems: 1. A single fulcrum is used between the leg rest and the main body for swinging, so the swing is relatively stiff (and the swing angle is generally 90 degrees), affecting the comfort; 2. The leg rest adopts a single swinging structure, so its length may not be enough to support the entire leg, affecting the comfort. Of course, there are also some that use an extended leg rest structure, but its integrity is also affected accordingly. Utility Model Content

[0003] The main purpose of the utility model is to provide an automatically adjustable leg rest for a sofa chair, aiming to improve the existing leg rest structure of the sofa chair, realize stepless adjustment of the leg rest, and the length of the leg rest can effectively support the legs.

[0004] To achieve the above object, the utility model provides an automatically adjustable leg support for a sofa chair, comprising:

[0005] A base frame, wherein a swingable leg support is provided at the front end of the base frame, inner link groups are provided on both sides of the leg support, and outer link groups are provided on both sides of the inner link group;

[0006] A linear drive device, a connecting rod is provided between the driving end of the linear drive device and the middle part of the leg support seat, the two ends of the connecting rod are pivotally connected to the driving end and the leg support seat respectively, and the linear drive device can drive the connecting rod to drive the leg support seat to switch between a position flush with the base frame or flipped to a position on the lower wall of the base frame.

[0007] In the actual design, the inner link group and the outer link group are arranged to avoid a gap between the base and the leg rest, so that support is generated between the sofa and the leg rest to facilitate the installation of the cushion; and the swing angle between the leg rest and the base is larger, which can reach nearly 180 degrees, so that the leg rest can be hidden when not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A three-dimensional diagram of the utility model Figure 1 ;

[0009] Figure 2 A three-dimensional diagram of the utility model Figure 2 ;

[0010] Figure 3 is a schematic diagram of a linear drive device;

[0011] Figure 4This is a simple diagram of a sofa.

[0012] In the figure,

[0013] 1 is a bottom frame, 10 is a leg support seat,

[0014] 2 is the inner link group, 20 is the inner tooth portion, 21 is the inner first connecting plate, 22 is the inner second connecting plate,

[0015] 3 is an outer link group, 30 is an outer tooth portion, 31 is an outer first connecting plate, 32 is an outer second connecting plate,

[0016] 4 is a connecting rod, 40 is a crank portion,

[0017] 5 is a linear drive device, 50 is a drive rod, 51 is a rotary motor, 52 is a screw slider,

[0018] 61 is a first matching tooth portion, and 62 is a second matching tooth portion. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the utility model, the descriptions of "first" or "second" etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0022] like Figures 1 to 4As shown, an automatically adjustable leg support for a sofa chair comprises:

[0023] A base frame 1, wherein a swingable leg support is provided at the front end of the base frame 1, inner link groups 2 are provided on both sides of the leg support, and outer link groups 3 are provided on both sides of the inner link group 2;

[0024] A linear drive device 5, a connecting rod 4 is provided between the driving end of the linear drive device 5 and the middle part of the leg support seat, and the two ends of the connecting rod 4 are pivotally connected to the driving end and the leg support seat respectively. The linear drive device 5 can drive the connecting rod 4 to drive the leg support seat to switch between a position flush with the base frame 1 or flipped to the position of the lower wall of the base frame 1.

[0025] In the actual design, the inner link group 2 and the outer link group 3 are arranged to avoid a gap between the base and the leg rest, so that support is generated between the sofa and the leg rest to facilitate the installation of the cushion body; and the swing angle between the leg rest and the base frame 1 is larger, which can reach nearly 180 degrees, so that the leg rest 10 can be hidden when not in use.

[0026] Specifically, the inner link group 2 and the outer link group 3 are both meshing structures, thereby achieving stepless adjustment, making the leg support seat swing more linearly.

[0027] In the embodiment of the utility model, the inner link group 2 includes an inner first connecting plate 21 pivotally mounted on the base frame 1, an inner tooth portion 20 provided on the leg support seat, and an inner second connecting plate 22 provided between the inner first connecting plate 21 and the inner tooth portion 20, and the outer link group 3 includes an outer first connecting plate 31 pivotally mounted on the leg support seat, an outer tooth portion 30 provided on the base frame 1, and an outer second connecting plate 32 provided between the outer tooth portion 30 and the outer first connecting plate 31;

[0028] The inner second connecting plate 22 is pivotally connected to the outer first connecting plate 31 and the outer second connecting plate 32 respectively;

[0029] The outer second connecting plate 32 is pivotally connected to the inner first connecting plate and the inner second connecting plate respectively, thereby realizing mutual restraint, providing greater supporting force, and ensuring the stability of the leg support seat.

[0030] Specifically, the inner tooth portion and the outer tooth portion are staggered.

[0031] In the embodiment of the utility model, the inner second connecting plate 22 and the outer second connecting plate 32 have the same structure, including a second body and second matching tooth portions 62 provided at two ends of the second body.

[0032] Specifically, the inner first connecting plate 21 and the outer first connecting plate 31 have the same structure, including a first body and a first matching tooth portion 61 provided at at least one end of the first body. In actual design, the structure of the connecting plates can be the same, thereby saving procurement costs and mold costs, and the leg support seat can be swung steplessly by engaging with each other; of course, in actual design, other structures, such as a latching tooth structure, can also achieve the same swinging effect.

[0033] In the embodiment of the utility model, the connecting rod 4 includes a main body and a crank portion 40 extending in an arc shape from the main body toward the leg rest seat. The end of the crank portion is pivotally connected to the leg rest seat, thereby realizing a 180-degree swing structure of the leg rest seat, which has a simple and stable structure.

[0034] Specifically, the linear drive device 5 includes a driving rod 50 arranged on the base frame 1, a ball screw arranged in the cavity of the driving rod 50, a screw slider 52 slidably installed on the ball screw, and a rotating motor 51 for driving the ball screw to rotate. The screw slider 52 is pivotally connected to the rear end of the connecting rod 4 and can drive it to move horizontally, thereby realizing the swing of the leg support seat.

[0035] In the embodiment of the utility model, the linear drive device 5 is arranged on the lower wall of the base frame 1 .

[0036] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An automatically adjustable leg support for a sofa chair, characterized in that: include: A base frame, wherein a swingable leg support is provided at the front end of the base frame, inner link groups are provided on both sides of the leg support, and outer link groups are provided on both sides of the inner link group; A linear drive device, wherein a connecting rod is provided between the driving end of the linear drive device and the middle part of the leg support seat, and the two ends of the connecting rod are pivotally connected to the driving end and the leg support seat respectively, and the linear drive device can drive the connecting rod to drive the leg support seat to switch between a position flush with the base frame or a position flipped to the lower wall of the base frame; The inner link group and the outer link group are both meshing structures; The inner link group includes an inner first connecting plate pivotally mounted on the base frame, an inner tooth portion provided on the leg support seat, and an inner second connecting plate provided between the inner first connecting plate and the inner tooth portion. The outer link group includes an outer first connecting plate pivotally mounted on the leg support seat, an outer tooth portion provided on the bottom frame, and an outer second connecting plate provided between the outer tooth portion and the outer first connecting plate; The inner second connecting plate is pivotally connected to the outer first connecting plate and the outer second connecting plate respectively; The outer second connecting plate is pivotally connected to the inner first connecting plate and the inner second connecting plate respectively; The inner tooth portion and the outer tooth portion are staggered.

2. The automatically adjustable leg support for a sofa chair as claimed in claim 1, characterized in that: The inner second connecting plate and the outer second connecting plate have the same structure, and include a second main body and second matching tooth portions arranged at two ends of the second main body.

3. The automatically adjustable leg support for a sofa chair as claimed in claim 2, characterized in that: The inner first connecting plate and the outer first connecting plate have the same structure, and include a first main body and a first matching tooth portion provided at at least one end of the first main body.

4. The automatically adjustable leg support for a sofa chair as claimed in claim 1, characterized in that: The connecting rod comprises a main body and a crank portion extending in an arc shape from the main body toward the leg support seat, and an end portion of the crank portion is pivotally connected to the leg support seat.

5. The automatically adjustable leg support for a sofa chair as claimed in claim 1, characterized in that: The linear drive device includes a driving rod arranged on a base frame, a ball screw arranged in a cavity of the driving rod, a screw slider slidably mounted on the ball screw, and a rotary motor for driving the ball screw to rotate. The screw slider is pivotally connected to the rear end of the connecting rod and can drive it to move horizontally.

6. The automatically adjustable leg support for a sofa chair as claimed in claim 1, characterized in that: The linear drive device is arranged on the lower wall of the base frame.

Images