Reversible-back chair frame and massage chair

Abstract

Two sets of four-connecting-rod structures are stacked, a driving device drives a rear swing rod to rotate around a base, and the rear swing rod pushes a back frame, a back frame swing rod, a seat frame and a seat frame swing rod to move synchronously, so that when the chair frame slides forwards, a backrest topples backwards, and a seat part warps upwards; the chair frame is changed from the sitting posture state to the lying posture state, the function of back falling is achieved, meanwhile, the angle between the seat part and the back part is changed, the problem that the angle of the L-shaped guide rail cannot be changed is solved, and better experience is brought to a user.

Description

Technical Field

[0001] This invention relates to the field of massage technology, specifically to a reclining chair frame and a massage chair. Background Technology

[0002] With the accelerating pace of modern life, people are experiencing increasing pressure, making a comfortable chair a necessity. Most existing home and office chairs are ordinary seats with non-adjustable backrest and seat angles, resulting in poor user comfort and a lack of adjustable angles to suit various user needs. Seats with adjustable angles typically use rail-based frames. To achieve a reclining backrest, additional rails are needed to enable forward sliding and reclining, which increases costs and complicates assembly. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by proposing a reclining chair frame and a massage chair, thereby solving the problems of existing chair frames having no adjustable angle between the seat and back, no reclining capability, high cost, and complex assembly.

[0004] This invention provides a reclining chair frame, including a base, a backrest, a seat frame, a drive device, a rear swing arm, a backrest swing arm, and a seat frame swing arm;

[0005] The backrest includes a seat and a backrest, the backrest being positioned to correspond to the user's lower back; the seat is for the user to sit on and is located above the seat.

[0006] The bottom ends of the rear swing arm, the back frame swing arm, and the seat frame swing arm are all hinged to the base. The rear swing arm is located near the back of the back frame, and the back frame swing arm and the seat frame swing arm are located near the front of the seat and the seat frame, respectively.

[0007] The first end of the back frame and the first end of the seat frame are both hinged to one end of the rear swing rod; the seat of the back frame is hinged to one end of the back frame swing rod; the second end of the seat frame is hinged to one end of the seat frame swing rod; one end of the drive device is hinged to the rear swing rod, and the other end is hinged to the base.

[0008] The rear swing arm, the back frame and the back frame swing arm form a first four-bar linkage mechanism, and the rear swing arm, the seat frame and the seat frame swing arm form a second four-bar linkage mechanism. The shape and motion trajectory of the first four-bar linkage mechanism are different from those of the second four-bar linkage mechanism.

[0009] The drive device drives the rear swing arm to rotate around the base, and the rear swing arm will push the back frame and back frame swing arm, the seat frame and seat frame swing arm to move synchronously, so that the chair frame is adjusted from a sitting position to a reclining position.

[0010] On the other hand, the present invention also provides a massage chair, including the aforementioned reclining chair frame, wherein a guide rail is provided on the back frame, a reciprocating massage mechanism is provided on the guide rail, a massage arm is provided on the massage mechanism, the massage arm can extend in a direction away from the massage mechanism, and when the massage mechanism moves to the seat, the massage arm can extend to a position close to or above the seat frame to massage the user;

[0011] It also includes a control device that controls the movement of the massage mechanism and the drive device.

[0012] By adopting the above technical solution, the present invention can achieve the following technical effects: Compared with the prior art, the reclining chair frame and massage chair utilize two sets of four-bar linkage structures superimposed. The rear swing arm is driven to rotate around the base by a drive device. The rear swing arm will push the back frame and back frame swing arm, the seat frame and seat frame swing arm to move synchronously, so that the chair frame slides forward while the backrest tilts backward and the seat tilts upward. The chair frame changes from a sitting position to a reclining position, realizing the reclining function. At the same time, the angle of the seat and back changes, solving the problem that the L-shaped guide rail cannot change the angle, and bringing a better experience to the user. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of a reclining chair frame according to an embodiment of the present invention is shown;

[0015] Figure 2 It is illustrated Figure 1 A schematic diagram of the first four-bar linkage of a reclining chair frame;

[0016] Figure 3 It is illustrated Figure 1 A schematic diagram of the second four-bar linkage of a reclining chair frame;

[0017] Figure 4 It is illustrated Figure 1 An exploded structural diagram of a type of reclining chair frame;

[0018] Figure 5 It is illustrated Figure 1 A schematic diagram illustrating the changing states of a reclining chair frame;

[0019] Figure Labels

[0020] 1-Base, 2-Backrest, 3-Seat frame, 4-Drive device, 5-Rear swing arm, 6-Backrest swing arm, 7-Seat frame swing arm, 21-Seat, 22-Backrest, 31-Seat plate, 32-First connecting rod, 33-Second connecting rod, 211-Third connecting rod, 8-Lower leg frame, a-First hinge point, b-Second hinge point, c-Third hinge point. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the 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 this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] Combined with appendix Figure 1-5 As shown, an embodiment of the present invention provides a reclining chair frame, including a base 1, a backrest 2, a seat frame 3, a drive device 4, a rear swing arm 5, a backrest swing arm 6, and a seat frame swing arm 7;

[0023] The backrest 2 includes a seat 21 and a backrest 22, the backrest 22 being positioned to support the user's lower back; the seat frame 3 is used for the user to sit on, and the seat frame 3 is located above the seat 21.

[0024] The bottom ends of the rear swing arm 5, the back frame swing arm 6 and the seat frame swing arm 7 are all hinged to the base 1. The rear swing arm 5 is located near the backrest 22 of the back frame 2, and the back frame swing arm 6 and the seat frame swing arm 7 are located near the front of the seat 21 and the seat frame 3, respectively.

[0025] The first end of the back frame 2 and the first end of the seat frame 3 are both hinged to one end of the rear swing rod 5. The seat 21 of the back frame 2 is hinged to one end of the back frame swing rod 6. The second end of the seat frame 3 is hinged to one end of the seat frame swing rod 7. One end of the drive device 4 is hinged to the rear swing rod 5, and the other end is hinged to the base 1.

[0026] The rear swing arm 5, the back frame 2 and the back frame swing arm 6 form a first four-bar linkage mechanism, and the rear swing arm 5, the seat frame 3 and the seat frame swing arm 7 form a second four-bar linkage mechanism. The shape and motion trajectory of the first four-bar linkage mechanism are different from those of the second four-bar linkage mechanism.

[0027] The driving device 4 drives the rear swing arm 5 to rotate around the base 1. The rear swing arm 5 will push the back frame 2 and back frame swing arm 6, the seat frame 3 and seat frame swing arm 7 to move synchronously, so that the chair frame can be adjusted from a sitting position to a reclining position.

[0028] In other words, the reclining chair frame provided in this embodiment of the invention utilizes two sets of four-bar linkage structures superimposed. The rear swing arm is driven to rotate around the base by a drive device. The rear swing arm will push the back frame and back frame swing arm, the seat frame and seat frame swing arm to move synchronously, so that the chair frame slides forward while the backrest tilts backward and the seat tilts upward. The chair frame changes from a sitting position to a reclining position, realizing the function of reclining. At the same time, the angle between the seat and the back changes, solving the problem that the L-shaped guide rail cannot change its angle, and bringing a better experience to the user.

[0029] Specifically, such as Figure 4 As shown, the point where the rear swing arm 5 is hinged to the base 1 is the first hinge point a, the point where the backrest swing arm 6 is hinged to the base 1 is the second hinge point b, and the point where the seat frame swing arm 7 is hinged to the base 1 is the third hinge point c. The first hinge point a, the second hinge point b, and the third hinge point c are arranged sequentially at intervals along a direction away from the backrest 22. Furthermore, the interval between the first hinge point a and the second hinge point b is much greater than the interval between the second hinge point b and the third hinge point c. This arrangement is to adjust the forward movement distance of the backrest; adjusting the interval distance allows adjustment of the forward movement distance of the chair frame.

[0030] It should be noted that the design of this invention includes a back frame, a base, a seat frame, a drive device (push rod), and multiple sets of connecting rods. The base has three sets of hinge points, serving as a fixed seat for the four-bar linkage. The first hinge point is hinged to the rear swing rod, which is a shared swing rod for both sets of four-bar linkages. Two hinge points are located at the front end, respectively hinged to the seat frame swing rod and the back frame swing rod. Thus, the two sets of four-bar linkages are superimposed. The first set of four-bar linkages controls the backrest's tilting and forward sliding, while the second set of four-bar linkages shares a portion of the first set's swing rod, controlling the seat frame's angle change asynchronously with the backrest's as the entire machine slides forward. The key point is that the two sets of four-bar linkages share a swing rod, and only by driving this shared swing rod can the asynchronous changes of the two sets of four-bar linkages be achieved.

[0031] Furthermore, in one instance, such as Figure 1-2 As shown, the chair also includes a calf support frame 8 and a calf push rod (not shown in the figure). One end of the calf push rod is hinged to the front end of the base, and the other end is hinged to the calf support frame, which is hinged to the front end of the seat frame. The calf push rod drives the calf support frame to rise or fall. Thus, when the chair is reclined, the calf support frame can be repeatedly raised and lowered to stretch the muscles of the legs and abdomen, thereby achieving a massage effect.

[0032] Furthermore, in one instance, such as Figure 4As shown, the seat frame 3 is provided with a seat plate 31, a first connecting rod 32, and a second connecting rod 33. The first connecting rod 32 and the second connecting rod 33 are located below the seat plate 31. The first end of the seat frame 3 is located on the first connecting rod 32, and the second end of the seat frame 3 is located on the second connecting rod 33. Thus, the rear swing arm is hinged to the first connecting rod on the seat frame at the first end of the seat frame, and the seat frame swing arm is hinged to the second connecting rod on the seat frame at the second end of the seat frame. Since the first and second connecting rods have a certain length, when the drive device drives the rear swing arm to move, the seat frame can remain above the seat portion of the backrest in any state. This provides movement space for the massage mechanism when the chair frame is used as a massage chair. Simultaneously, it increases the swing angle of the seat frame swing arm and the rear swing arm, resulting in a longer forward movement distance for the entire chair frame. This further allows for a more reclined backrest posture, improving comfort and achieving a zero-gravity, zero-wall-adhesion function.

[0033] Furthermore, in one instance, such as Figure 4 As shown, a third connecting rod 211 is provided on the seat portion 21 of the backrest 2. One end of the third connecting rod 211 is fixed to the seat portion 21 of the backrest 2, and the other end is higher than the seat portion 21 of the seat frame 2 and hinged to one end of the backrest swing rod 6. The hinge point between the third connecting rod 211 and the backrest swing rod 6 is higher than the seat portion 21, which increases the swing angle of the backrest swing rod, making the adjustment angle between the backrest and the seat frame larger, and further making the reclining posture of the chair frame more comfortable.

[0034] Additionally, it should be noted that the hinge points of the seat frame and back frame with the rear swing arm are not necessarily the same hinge point, and may not coincide. The specific hinge point with the rear swing arm can be determined according to the required tilt angle of the seat frame. However, for ease of installation and comfortable sitting posture, the embodiments of the present invention set the two hinge points to coincide together, that is, one end of the rear swing arm is hinged to the first end of the seat frame and the first end of the back frame.

[0035] Furthermore, in one instance, such as Figure 4 As shown, the width of the backrest is narrower than the width of the seat frame. The second hinge point a corresponds to the width of the backrest, and the first hinge point b and the third hinge point c correspond to the width of the seat frame. This allows the angle between the seat frame and the backrest to be adjusted. When using this frame on a massage chair, the massage mechanism can be installed on the frame, allowing it to move under the seat frame to massage the user's thighs and buttocks.

[0036] Furthermore, in one instance, such as Figure 4 As shown, the distance between the first hinge point a and the second hinge point b is much greater than the distance between the second hinge point b and the third hinge point c. Adjusting this distance can adjust the forward movement distance of the chair frame.

[0037] Furthermore, in one example, the drive device 4 is any one of a push rod, an airbag assembly, a cylinder, or a hydraulic cylinder.

[0038] The installation structure and working principle of the chair frame according to the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0039] like Figure 1-5 As shown, the reclining chair frame includes a base 1, a backrest 2, a seat frame 3, a drive unit 4, a rear swing arm 5, a backrest swing arm 6, and a seat frame swing arm 7. The backrest 2 includes a seat 21 and a backrest 22, with the backrest 22 positioned to support the user's lower back. The seat frame 3 is used for the user to sit on and is located above the seat 21. The seat frame 3 is provided with a seat plate 31, a first connecting rod 32, and a second connecting rod 33. The first connecting rod 32 and the second connecting rod 33 are located below the seat plate 31. The first end of the seat frame 3 is mounted on the first connecting rod 32, and the second end of the seat frame 3 is mounted on the second connecting rod 33. A third connecting rod 211 is provided on the seat 21 of the backrest 2. One end of the third connecting rod 211 is fixed to the seat 21 of the backrest 2, and the other end is higher than the seat 21 of the backrest 2 and hinged to one end of the backrest swing arm 6. Specifically, the point where the rear swing arm 5 is hinged to the base 1 is the first hinge point a, the point where the back frame swing arm 6 is hinged to the base 1 is the second hinge point b, and the point where the seat frame swing arm 7 is hinged to the base 1 is the third hinge point c. The first hinge point a, the second hinge point b, and the third hinge point c are arranged sequentially at intervals along the direction away from the backrest 22, and the interval between the first hinge point a and the second hinge point b is much greater than the interval between the second hinge point b and the third hinge point c. Specifically, the rear swing arm 5 is positioned near the backrest 22 of the back frame 2, and the back frame swing arm 6 and the seat frame swing arm 7 are positioned near the seat 21 and the front side of the seat frame 3, respectively. The first end of the back frame 2 and the first end of the seat frame 3 are both hinged to one end of the rear swing arm 5, and the seat 21 of the back frame 2 is hinged to one end of the back frame swing arm 6. The second end of the seat frame 3 is hinged to one end of the seat frame swing arm 7. One end of the drive device 4 is hinged to the rear swing arm 5, and the other end is hinged to the base 1. The rear swing arm 5, the back frame 2, and the back frame swing arm 6 form a first four-bar linkage mechanism, and the rear swing arm 5, the seat frame 3, and the seat frame swing arm 7 form a second four-bar linkage mechanism. The shape and motion trajectory of the first four-bar linkage mechanism are different from those of the second four-bar linkage mechanism.

[0040] The drive device 4 drives the rear swing arm 5 to rotate around the base 1. The rear swing arm 5 will push the back frame 2 and back frame swing arm 6, the seat frame 3 and seat frame swing arm 7 to move synchronously, so that the chair frame can be adjusted from a sitting position to a reclining position.

[0041] Furthermore, this embodiment also provides a massage chair, including the aforementioned reclining chair frame. The back frame is provided with a guide rail, and the guide rail is provided with a reciprocating massage mechanism. The massage mechanism is provided with a massage arm, which can extend away from the massage mechanism. When the massage mechanism moves to the seat, the massage arm can extend to a position close to or above the seat frame to massage the user.

[0042] It also includes a control device that controls the movement of the massage mechanism and the drive device.

[0043] In other words, the reclining chair frame provided in this embodiment of the invention utilizes two sets of four-bar linkage structures superimposed. The rear swing arm is driven to rotate around the base by a drive device. The rear swing arm will push the back frame and back frame swing arm, the seat frame and seat frame swing arm to move synchronously, so that the chair frame slides forward while the backrest tilts backward and the seat tilts upward. The chair frame changes from a sitting position to a reclining position, realizing the function of reclining. At the same time, the angle between the seat and the back changes, solving the problem that the L-shaped guide rail cannot change its angle, and bringing a better experience to the user.

[0044] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0045] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A reversible chair frame, characterized in that: It includes a base, a back frame, a seat frame, a driving device, a rear swing rod, a back frame swing rod and a seat frame swing rod; The back frame includes a seat and a backrest, wherein the backrest is arranged corresponding to the waist and back of the user; the seat frame is used for the user to sit on, and the seat frame is located above the seat; The bottom ends of the rear swing rod, the back frame swing rod and the seat frame swing rod are all hinged on the base, the rear swing rod is arranged close to the backrest of the back frame, and the back frame swing rod and the seat frame swing rod are arranged close to the front side of the seat and the seat frame respectively; The first end of the back frame and the first end of the seat frame are both hinged to one end of the rear swing rod, the seat of the back frame is hinged to one end of the back frame swing rod; the second end of the seat frame is hinged to one end of the seat frame swing rod; one end of the driving device is hinged to the rear swing rod, and the other end is hinged to the base; The rear swing rod, the back frame and the back frame swing rod form a first four-bar linkage, the rear swing rod, the seat frame and the seat frame swing rod form a second four-bar linkage, and the shape and motion trajectory of the first four-bar linkage are different from those of the second four-bar linkage; The driving device drives the rear swing rod to rotate around the base, and the rear swing rod will respectively push the back frame and the back frame swing rod, the seat frame and the seat frame swing rod to move synchronously, so that the chair frame can be adjusted from a sitting position to a lying position.

2. The reversible chair frame according to claim 1, characterized in that: It also includes a calf iron frame and a calf push rod, one end of the calf push rod is hinged to the front end of the base, and the other end is hinged to the calf iron frame, and the calf iron frame is hinged to the front end of the seat frame; the calf push rod drives the calf iron frame to be lifted or lowered.

3. The reversible chair frame according to claim 1, characterized in that: The point where the rear swing arm is hinged to the base is the first hinge point, the point where the back frame swing arm is hinged to the base is the second hinge point, and the point where the seat frame swing arm is hinged to the base is the third hinge point. The first hinge point, the second hinge point and the third hinge point are arranged in sequence away from the backrest portion.

4. The reversible chair frame according to claim 3, characterized in that: The distance between the first hinge point and the second hinge point is much greater than the distance between the second hinge point and the third hinge point.

5. The reversible chair frame according to claim 1, characterized in that: The seat frame is provided with a seat plate, a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are arranged below the seat plate, the first end of the seat frame is arranged on the first connecting rod, and the second end of the seat frame is arranged on the second connecting rod.

6. The reversible chair frame according to claim 1, characterized in that: A third connecting rod is arranged on the seat of the back frame, one end of the third connecting rod is fixed on the seat of the back frame, and the other end of the third connecting rod is higher than the seat of the back frame and is hinged to one end of the back frame swing rod.

7. The reversible chair frame according to claim 1, characterized in that: The width of the back frame is narrower than the width of the seat frame.

8. The reversible chair frame according to claim 3, characterized in that: The second hinge point is set corresponding to the width of the back frame, and the first hinge point and the third hinge point are set corresponding to the width of the seat frame.

9. The reversible chair frame according to claim 1, characterized in that: The driving device is any one of a push rod, an air bag assembly, an air cylinder, and an oil cylinder.

10. A massage chair, characterized in that: The invention comprises a reversible chair frame as claimed in claims 1 to 9, wherein a guide rail is arranged on the back frame, a reciprocating massage mechanism is arranged on the guide rail, a massage swing arm is arranged on the massage mechanism, and the massage swing arm can be extended in a direction away from the massage mechanism, and when the massage mechanism moves to the seat, the massage swing arm can be extended to a position close to or above the seat frame to massage the user; It also includes a control device, which controls the movement of the massage movement and the driving device.

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