A chair frame

Abstract

The present invention discloses a chair frame. Through the cooperation of a single push rod, a sleeve assembly and a limiting structure, the chair frame realizes the switching between the sitting posture state and the reclined back state. At the same time, when in the sitting posture state, the backrest remains stationary while the calf can be lifted independently, so as to meet the user's diverse needs for adjusting the calf angle in the sitting posture state, reduce the cost of the chair frame, and simplify the operation of the chair frame function.

Description

Technical Field

[0001] The invention relates to the technical field of chairs, and specifically, to a chair frame. Background Art

[0002] The characteristic of a zero-gravity home chair is to create a weightless feeling in outer space, allowing people to be in a completely relaxed state. As the pace of life continues to accelerate, people's desire to improve the quality of life is constantly increasing. The zero-gravity chair can just well release pressure on the human body and improve the quality of life. Most of the existing electric zero-gravity chairs in the market are of a double-push-rod structure, and the double-push-rod structure has a relatively high cost and a more complex control part. In view of this, this application is specifically proposed. Summary of the Invention

[0003] The present invention provides a chair frame in view of the deficiencies of the prior art. Through a single-push-rod structure, in addition to realizing the switching between the sitting state and the reclining state, the cost is reduced and the operation is simplified.

[0004] An embodiment of the present invention provides a chair frame that can realize the transformation between the sitting posture and the lying posture of the human body. It is characterized in that it includes a seat frame, a base, a calf assembly, a backrest frame, a push rod and a swing rod assembly; the backrest frame is arranged on the seat frame, the seat frame is rotatably fixed on the base, the base is used to support the seat frame and the backrest frame, and one end of the calf assembly is pivotally connected to the seat frame; the push rod includes a guide rod and a slider, the slider is arranged on the guide rod so as to be reciprocally movable, and one end of the guide rod is fixed or hinged to the base;

[0005] The swing rod assembly includes a front swing rod and a calf push rod. One end of the front swing rod is pivotally connected to the seat frame, and the other end is pivotally connected to the slider. A limit block is arranged on the front swing rod. One end of the calf push rod is pivotally connected to the slider, and the other end of the calf push rod is pivotally connected to the calf assembly;

[0006] When the slider is pushed, the calf push rod pushes the calf assembly to move around the seat frame. When the front swing rod rotates with the slider until the limit block on the front swing rod abuts against the seat frame, the front swing rod and the limit block jointly push the seat frame to rotate relative to the base until the calf assembly and the seat frame are lifted simultaneously, so that the chair frame is transformed from the sitting posture to the lying posture.

[0007] Further, as an executable solution, the swing rod assembly further includes a rear swing rod. One end of the rear swing rod is pivotally connected to the seat frame, and the other end is pivotally connected to the slider. A limit block is also arranged on the rear swing rod, and the front swing rod and the rear swing rod are arranged in parallel.

[0008] Further, as an executable solution, the swing rod assembly further includes a rotating connecting piece, and the rotating connecting piece is pivotally connected to the slider. When the slider is pushed, the rotating connecting piece forms a certain angle with the slider under the drive of the front swing rod and / or the rear swing rod.

[0009] Further, as an executable solution, the swing rod assembly further includes a tension spring, which is arranged between the calf push rod and the front swing rod. One end of the tension spring is fixed on the slider, and the other end of the tension spring is fixed on the seat frame. During the process that the push rod pushes the slider forward, the tension spring is used to move the seat frame towards the push rod, so that the seat frame is relatively stationary with respect to the push rod before the limit block abuts against the seat frame.

[0010] Further, as an executable solution, there are a pair of the tension springs, which are respectively arranged on the left and right sides of the push rod.

[0011] Further, as an executable solution, the chair frame further includes an anti-pinch assembly, which includes an anti-pinch member and an anti-pinch tension spring. One end of the anti-pinch member is hinged to the seat frame, and the other end is hinged to the calf push rod. One end of the anti-pinch tension spring is fixed to one end of the anti-pinch member, and the other end is fixed to the calf assembly. A rubber gasket is fixedly arranged on one side of the anti-pinch member close to the calf assembly. When the chair frame is in the sitting posture state, the rubber gasket abuts against the calf assembly.

[0012] Further, as an executable solution, the base includes a left side plate and a right side plate, and the seat frame is pivotally connected to the left side plate and the right side plate respectively through two swing rods.

[0013] By adopting the above technical solution, the present invention can achieve the following technical effects: Compared with the prior art, through the single push rod structure, the chair frame can not only realize the switching between the sitting posture state and the reclining state, but also realize that when in the sitting posture state, the backrest remains stationary and the calf is lifted separately to meet the user's demand for diversified adjustment of the calf angle in the sitting posture state, and reduce the cost of the chair frame and simplify the operation of the chair frame functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0015] Figures 1 to 3 shows a schematic structural diagram of the chair frame from the sitting posture state to the state where the calf is lifted separately to the zero-gravity state in the embodiments of the present invention;

[0016] Figures 4 to 6 shows Figures 1 to 3 a partially enlarged structural diagram of the components of the seat frame, calf, push rod and swing rod assembly in

[0017] Figure 7 and Figure 8 showsFigures 1 to 6 Cross-sectional schematic diagram of components of the middle swing rod assembly;

[0018] Figure 9 Illustrates Figures 1 to 8 Exploded structural schematic diagram of the middle swing rod assembly. Specific implementation manners

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Combined with Figures 1 to 6 As shown, an embodiment of the present invention provides a chair frame, including a seat frame 1, a base, a calf assembly 2, a backrest frame 3, a push rod 4 and a swing rod assembly; the backrest frame 3 is disposed on the seat frame 1, the seat frame 1 is rotatably fixed on the base, the base is used to support the seat frame 1 and the backrest frame 3, and one end of the calf assembly 2 is pivotally connected to the seat frame 1; the push rod 4 includes a guide rod and a slider 11, the slider 11 is reciprocally movably disposed on the guide rod, and one end of the guide rod is fixed or hinged to the base through a push rod ear seat 5.

[0021] The swing rod assembly includes a front swing rod 6 and a calf push rod 9. The front swing rod 6 is a transfer member having three mounting holes. In order to eliminate the sound of rotation between metals, a sound insulation sleeve or a sound insulation gasket is installed in each mounting hole. One mounting hole at one end of the front swing rod 6 is pivotally connected to the seat frame 1 through a rotating shaft, the mounting hole in the middle is pivotally connected to the slider 11 through a rotating shaft, and the mounting hole at the other end is pivotally connected to one end of the calf push rod 9 through a rotating shaft. A limiting block 12 is provided on the front swing rod 6, and the other end of the calf push rod 9 is pivotally connected to the calf assembly 2.

[0022] When the slider 11 is pushed, the calf push rod 9 pushes the calf assembly 2 to move around the seat frame 1. When the front swing rod 6 rotates with the slider 11 until the limiting block 12 on the front swing rod 6 abuts against the seat frame 1, the front swing rod 6 and the limiting block 12 jointly push the seat frame 1 to rotate relative to the base until the calf assembly 2 and the seat frame 1 are simultaneously lifted, so that the chair frame is changed from a sitting posture to a lying posture.

[0023] Further, in order to ensure the stability of the seat frame during movement, the swing rod assembly may further include a rear swing rod 7. One end of the rear swing rod 7 is pivotally connected to the seat frame 1, and the other end is pivotally connected to the slider 11. The rear swing rod 7 is a transfer member having two mounting holes, and a sound insulation sleeve or a sound insulation gasket is installed in each mounting hole. The front swing rod 6 and the rear swing rod 7 are arranged in parallel; wherein, the front swing rod 6 and the rear swing rod 7 are both in a pair, and are respectively arranged on the left and right sides of the push rod 4, and can be pivotally connected to the slider 11 through a rotating connector 10. When the slider 11 is pushed, the rotating connector 10 forms a certain angle with the slider under the drive of the front swing rod 6 and / or the rear swing rod 7. It should be noted that only one of the front swing rod 6 and the rear swing rod 7 needs to be provided with a limiting block 12 to realize the movement process of this solution. Of course, for the sake of considering the stability of the chair frame, etc., limiting blocks 12 can also be provided at the same positions of the front swing rod 6 and the rear swing rod 7. The embodiments of the present invention do not make any limitations in this regard. Specifically, the cross-sectional view and the exploded view of the swing rod assembly can Figures 7 to 9 be shown as

[0024] Further, in an example, in order to meet the diverse needs of users, such as independently adjusting the calf angle according to different needs in the upright sitting position and performing lifting operations on the calf assembly to provide a better user experience, the swing rod assembly further includes a tension spring 8. The tension spring 8 is arranged between the calf push rod 9 and the front swing rod 6. One end of the tension spring 8 is fixed on the slider 11, and the other end of the tension spring 8 is fixed on the seat frame 1. During the process of the push rod 4 pushing the slider 11 forward, the tension spring 8 is used to move the seat frame 1 toward the push rod 4, so that before the limiting block 12 abuts against the seat frame 1, the seat frame 1 is fixed relative to the push rod 4. And the tension springs 8 are in a pair, and are respectively arranged on the left and right sides of the push rod 4.

[0025] Specifically, when the push rod 4 pushes the slider 11 to move, under the pulling force of the tension spring 8, the stable seat frame 1 does not move, so that the calf assembly 2 first rotates relative to the backrest frame 3. When the limiting block 12 on the swing rod assembly abuts against the bottom of the seat frame 1, the slider 11 continues to be pushed forward. The pushing force of the push rod is greater than the pulling force of the tension spring 8, then the swing rod assembly will push the seat frame 1 to make the backrest frame 3 rotate relative to the seat frame 1 until the front ends of the calf assembly and the seat frame 1 are simultaneously lifted, so that the chair frame is changed from the sitting position to the lying position. Thus, a single push rod can independently control the lifting of the calf, and the chair frame can be changed from the sitting position to the lying position, enriching the

[0026] posture of the chair frame and expanding the functions of the chair frame.

[0027] Further, in an example, such as Figure 6As shown in the figure, in order to prevent foreign objects from being clamped under the calf component when the calf component is reset, the chair frame further includes an anti-pinch component, which includes an anti-pinch member 13 and an anti-pinch tension spring 14. One end of the anti-pinch member 13 is hinged to the seat frame, and the other end is hinged to the calf push rod 9. One end of the anti-pinch tension spring 14 is fixed to one end of the anti-pinch member 13, and the other end is fixed to the calf component 2. A rubber gasket 15 is fixedly provided on the side of the anti-pinch member 13 close to the calf component 2. When the chair frame is in the sitting posture state, the rubber gasket 15 abuts against the calf component 2. When the calf component is lifted and then reset to the sitting posture state, if there is a foreign object under the calf component

[0028] , then under the action of the anti-pinch tension spring, the calf will not directly tighten and reset, but will form a certain angle. After the foreign object is removed, it will be reset. And due to the setting of the rubber gasket, there will be no sound of metal collision during resetting.

[0029] Furthermore, as Figures 1 to 3 shown, in order to cooperate with the chair frame to achieve the zero-gravity state, the base includes a left side plate 16 and a right side plate (not shown in the figure). Two sides of the seat frame 1 are respectively pivotally connected to the left side plate 16 and the right side plate through two swing rods 18. When the chair frame is adjusted from the sitting posture state to the zero-gravity state, the seat frame 1 is driven by the swing rods 18 and cooperates with the bottom rollers or roller structures (not shown in the figure) of the backrest frame 3 to recline relative to the left side plate 16 and the right side plate together with the backrest frame 3 to achieve the zero-gravity state.

[0030] That is to say, the technical solution of the embodiment of the present invention enables the single push rod to achieve the movement mode of the calf lifting first and the back reclining later through structural adjustment. Under the combined action of the push rod and the swing rod assembly, the calf is lifted independently, and a limit structure is used to limit the spatial limit of the non-synchronous movement, so as to achieve the action switching between independent movement and synchronous linkage. During independent movement, the calf can be adjusted independently to lift the angle to meet the comfort requirements of different users in different usage scenarios. During the switching process of the seat from the sitting posture state to the zero-gravity mode, the calf is first lifted independently to a limited position and then moves synchronously with the seat frame to the zero-gravity state; during the switching process of the seat from the zero-gravity mode back to the sitting posture state, the calf and the seat frame are first reset synchronously, and after the seat frame is reset, the calf continues to be reset independently to the limited position, enabling the single push rod to achieve the synchronization and separation of the actions of the calf and the seat frame.

[0031] This chair frame, through the single push rod structure, in addition to realizing the switching between the sitting posture state and the reclining state, also realizes that the backrest does not move and the calf is lifted independently in the sitting posture state to meet the user's diverse adjustment requirements for the calf angle in the sitting posture state, and reduces the cost of the chair frame and simplifies the operation of the chair frame functions.

[0032] Although the preferred embodiments of the present application have been described, additional changes and modifications can be made by those skilled in the art once they learn of the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present application.

[0033] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A chair frame that can achieve the transformation between the sitting and lying postures of the human body, characterized in that, It includes a seat frame, a base, a calf assembly, a backrest frame, a push rod and a swing rod assembly; the backrest frame is provided on the seat frame, the seat frame is rotatably fixed on the base, the base is used to support the seat frame and the backrest frame, and one end of the calf assembly is pivotally connected to the seat frame; the push rod includes a guide rod and a slider, the slider is arranged on the guide rod so as to be reciprocally movable, and one end of the guide rod is fixed or hinged to the base; The swing rod assembly includes a front swing rod and a calf push rod, one end of the front swing rod is pivotally connected to the seat frame, the other end is pivotally connected to the slider, a limiting block is arranged on the front swing rod, one end of the calf push rod is pivotally connected to the slider, and the other end of the calf push rod is pivotally connected to the calf assembly; When the slider is pushed, the calf push rod pushes the calf assembly to move around the seat frame. When the front swing rod rotates with the slider until the limiting block on the front swing rod abuts against the seat frame, the front swing rod and the limiting block jointly push the seat frame to rotate relative to the base until the calf assembly and the seat frame are lifted simultaneously, so that the chair frame changes from a sitting posture to a lying posture.

2. The chair frame according to claim 1, wherein, The swing rod assembly further includes a rear swing rod, one end of the rear swing rod is pivotally connected to the seat frame, the other end is pivotally connected to the slider, a limiting block is also arranged on the rear swing rod, and the front swing rod and the rear swing rod are arranged in parallel.

3. The chair frame according to claim 1 or 2, characterized in that, The swing rod assembly further includes a rotating connecting piece, the rotating connecting piece is pivotally connected to the slider, and when the slider is pushed, the rotating connecting piece forms a certain angle with the slider under the drive of the front swing rod and / or the rear swing rod.

4. The chair frame according to claim 1, characterized in that, The swing rod assembly further includes a tension spring, the tension spring is arranged between the calf push rod and the front swing rod, one end of the tension spring is fixed on the slider, and the other end of the tension spring is fixed on the seat frame. During the process of the push rod pushing the slider forward, the tension spring is used to pull the seat frame towards the push rod, so that the seat frame is fixed relative to the push rod before the limiting block abuts against the seat frame.

5. The chair frame according to claim 4, characterized in that, There are a pair of the tension springs, which are respectively arranged on the left and right sides of the push rod.

6. The chair frame according to claim 1, wherein The chair frame further includes an anti-pinch assembly, the anti-pinch assembly includes an anti-pinch piece and an anti-pinch tension spring, one end of the anti-pinch piece is hinged to the seat frame, the other end is hinged to the calf push rod, one end of the anti-pinch tension spring is fixed to one end of the anti-pinch piece, and the other end is fixed to the calf assembly. A rubber gasket is fixedly arranged on one side of the anti-pinch piece close to the calf assembly, and when the chair frame is in a sitting posture, the rubber gasket abuts against the calf assembly.

7. The chair frame according to claim 1, characterized in that, The base includes a left side plate and a right side plate, and the seat frame is pivotally connected to the left side plate and the right side plate respectively through two swing rods.

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