Double-rod system linkage stretching massage chair seat frame mechanism

Abstract

The utility model relates to a double-rod system linkage stretching massage chair seat frame mechanism which comprises a backrest frame, a shank frame, a base frame and a driving electric cylinder. A transverse supporting pipe fitting is fixed to the bottom of the backrest frame, and the transverse supporting pipe fitting is hinged to a second connecting rod in a crossed mode to form an X-shaped hinged structure. The lower end of the first connecting rod is fixed on the base frame; one end of the third connecting rod is hinged to the upper end of the second connecting rod; during folding, the second connecting rod and the third connecting rod form a V-shaped layout with an opening facing the shank frame, and the first connecting rod and the second connecting rod are longitudinally and compactly folded along the base frame; during unfolding, the driving electric cylinder pushes the backrest frame to incline backwards, the X-shaped hinge structure is unfolded, and the third connecting rod pushes the shank frame to swing upwards. Through the linkage design of X-shaped hinging and V-shaped folding, the transmission path is simplified, the folding size is reduced, meanwhile, the supporting strength and action smoothness are improved, a driving electric cylinder or a push rod does not need to be additionally arranged independently, and the manufacturing cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of massage chairs, in particular to a double-rod system linkage extension massage chair seat frame mechanism. Background Art

[0002] As a smart health device, the performance of the posture adjustment mechanism of the massage chair directly affects the user experience. The backrest steel frame and the base steel frame of the existing massage chair are connected by a first electric push rod, and the angle adjustment of the backrest from 0° to 160° is achieved by the extension and retraction of the electric push rod. At the same time, the calf massage assembly hinged to the front end of the backrest steel frame is driven to flip by a second independent electric push rod, and its range of motion is usually 0° to 45°. When the user chooses the lying mode, the control system needs to synchronously control the extension of the first electric push rod and the contraction of the second electric push rod to form a coherent support plane for the backrest and the calf. However, this technical solution has the following significant defects: the dual electric push rods need to rely on complex control algorithms to achieve action synchronization, and the electric push rods are used for control throughout the process, and the mechanical reliability is low. Utility Model Content

[0003] The utility model aims to overcome the shortcomings and deficiencies of the prior art and to provide a double-rod system linkage extension massage chair seat frame mechanism.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-rod system linkage extension massage chair seat frame mechanism, including a backrest frame, a calf frame, and a base frame, wherein the front end of the backrest frame is rotatably connected to the calf frame, the rear end of the backrest frame is rotatably connected to the base frame, and the base frame drives the backrest frame to swing by driving an electric cylinder, a transverse support pipe: fixed to the bottom of the backrest frame, and its two ends are welded to the two sides of the backrest frame; an X-shaped hinge structure: formed by cross-hinging the second connecting rod and the transverse support pipe; the lower end of the second connecting rod is hinged to the upper end of the first connecting rod, and the first connecting rod is hinged to the lower end of the second connecting rod. The lower end is hinged to the base frame; the third connecting rod: one end is hinged to the upper end of the second connecting rod, and the other end is connected to the calf frame through the leg frame linkage assembly; when the connecting rod assembly is in a folded state: the second connecting rod and the third connecting rod form a V-shaped layout with the opening facing the calf frame; the first connecting rod and the second connecting rod are compactly folded along the longitudinal direction of the base frame; when the connecting rod assembly is in an unfolded state: the driving electric cylinder pushes the backrest frame to tilt backward, the X-shaped hinge structure of the second connecting rod and the transverse supporting pipe is unfolded, and the third connecting rod moves up with the second connecting rod and pushes the leg frame linkage assembly to unfold so that the calf frame swings upward.

[0005] As a preferred technical solution of the utility model, the upper middle portion of the second connecting rod is cross-hinged with the transverse supporting pipe.

[0006] As a preferred technical solution of the utility model, the transverse supporting pipe is a rectangular cross-section steel pipe, and the cross-hinged point between the transverse supporting pipe and the second connecting rod is located in the middle section of the transverse supporting pipe.

[0007] As a preferred technical solution of the utility model, the second connecting rod includes two second connecting plates symmetrically arranged on both sides of the transverse supporting pipe, and the upper middle part of the second connecting plate is hinged to the transverse supporting pipe.

[0008] As a preferred technical solution of the utility model, the base frame is provided with a vertical connecting pipe, a connecting groove is provided on the top of the base frame, and the lower end of the first connecting rod is embedded in the connecting groove and fixed by a pin shaft.

[0009] As a preferred technical solution of the utility model, vertical support pipes are fixed on both sides of the rear end of the base frame, and both sides of the backrest frame are hinged to the vertical support pipes through a first hinge point, and steel frame support members are arranged on both sides of the front end of the backrest frame, and both ends of the steel frame support members are hinged to the backrest frame and the base frame through a second hinge point and a third hinge point respectively.

[0010] As a preferred technical solution of the utility model, the calf linkage bracket includes a fixed seat connected to the upper part of the backrest frame, an inner swinging piece hinged on the inner side of the fixed seat, an outer swinging piece hinged on the outer side of the fixed seat, and a connecting piece connecting the inner swinging piece and the other end of the outer swinging piece. The connecting piece and the fixed seat are respectively arranged at the two ends of the inner swinging piece and the outer swinging piece. The connecting piece is connected to a roller which is always in abutment with the back side of the calf frame, and the upper end of the third connecting rod is hinged to the inner swinging piece.

[0011] Compared with the prior art, the beneficial effect of the utility model is that through the X-shaped cross-hinge structure of the lateral support pipe and the second connecting rod, the gathering and expansion of the third connecting rod and the second connecting rod as well as the first connecting rod and the second connecting rod are realized. Compared with the traditional driving method of adding an electric cylinder or a push rod, the transmission is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the massage chair of the utility model in a lying state;

[0013] Figure 2 This is a schematic diagram of the structure of the massage chair of the utility model in an upright state;

[0014] Figure 3 This is a schematic diagram of the structure of the massage chair of the utility model in an upright state;

[0015] Figure 4 This is a schematic diagram of the structure of the connecting rod assembly in the utility model in a folded state;

[0016] Figure 5 It is a structural schematic diagram of the connecting rod assembly in the utility model in an expanded state.

[0017] Figure numerals: 1. backrest frame; 2. calf frame; 3. base frame; 4. driving electric cylinder; 5. horizontal supporting pipe fitting; 6. first connecting rod; 7. second connecting rod; 8. third connecting rod; 9. leg frame linkage assembly; 10. roller; 11. vertical connecting pipe fitting; 12. connecting groove; 13. vertical supporting pipe fitting; 14. first hinge point; 15. steel frame support member; 16. second hinge point; 17. third hinge point; 18. fixed seat; 19. inner swing member; 20. outer swing member; 21. connecting member. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] like Figure 1-5 The double-rod system linkage extension massage chair seat frame mechanism shown in the figure includes a backrest frame 1, a calf frame 2, and a base frame 3. The front end of the backrest frame 1 is rotatably connected to the calf frame 2, and the rear end of the backrest frame 1 is rotatably connected to the base frame 3. The base frame 3 drives the backrest frame 1 to swing by driving the electric cylinder 4. The transverse support pipe 5 is fixed to the bottom of the backrest frame 1, and its two ends are welded to the two sides of the backrest frame 1; the X-shaped hinge structure is formed by the second connecting rod 7 and the transverse support pipe 5 being cross-hinged; the lower end of the second connecting rod 7 is hinged to the upper end of the first connecting rod 6, and the lower end of the first connecting rod 6 is hinged to the base frame 3; the Three-link 8: one end is hinged to the upper end of the second link 7, and the other end is connected to the calf frame 2 through the leg frame linkage assembly 9; when the link assembly is in a folded state: the second link 7 and the third link 8 form a V-shaped layout with the opening facing the calf frame 2; the first link 6 and the second link 7 are compactly folded along the longitudinal direction of the base frame 3; when the link assembly is in an unfolded state: the driving electric cylinder 4 pushes the backrest frame 1 to tilt backward, the X-shaped hinge structure of the second link 7 and the transverse support pipe 5 unfolds, and the third link 8 moves up with the second link 7 and pushes the leg frame linkage assembly 9 to unfold and make the calf frame 2 swing upward.

[0021] Through the X-shaped cross-hinged structure of the lateral support pipe 5 and the second connecting rod 7, the gathering and expansion of the third connecting rod 8 and the second connecting rod 7 as well as the first connecting rod 6 and the second connecting rod 7 are realized. Compared with the traditional driving method of adding an electric cylinder or a push rod, the transmission is stable and reliable.

[0022] The upper middle portion of the second connecting rod 7 is cross-hinged with the transverse supporting pipe 5 . The transverse supporting pipe 5 is a steel pipe with a rectangular cross section. The cross-hinged point between the second connecting rod 7 and the transverse supporting pipe 5 is located in the middle section of the transverse supporting pipe 5 .

[0023] The second connecting rod 7 includes two second connecting plates symmetrically arranged on both sides of the transverse supporting pipe 5. The upper and middle parts of the second connecting plates are hinged to the transverse supporting pipe 5. The symmetrically arranged double second connecting plates disperse stress, enhance the rigidity of the hinge point, avoid unilateral deformation due to force, and improve service life.

[0024] The base frame 3 is provided with a vertical connecting pipe 11, a connecting groove 12 is provided on the top of the base frame 3, and the lower end of the first connecting rod 6 is embedded in the connecting groove 12 and fixed by a pin.

[0025] Vertical support pipes 13 are fixed on both sides of the rear end of the base frame 3, and both sides of the back frame 1 are hinged to the vertical support pipes 13 through the first hinge point 14. Steel frame support members 15 are arranged on both sides of the front end of the back frame 1, and both ends of the steel frame support member 15 are hinged to the back frame 1 and the base frame 3 through the second hinge point 16 and the third hinge point 17 respectively. The vertical support pipe 13 at the rear end of the base frame 3 and the steel frame support member 15 at the front end of the back frame 1 form a multi-point hinged support to enhance the overall stability of the frame and avoid overturning.

[0026] The calf linkage bracket includes a fixed seat 18 connected to the upper part of the backrest frame 1, an inner swinging member 19 hinged on the inner side of the fixed seat 18, an outer swinging member 20 hinged on the outer side of the fixed seat 18, and a connecting member 21 connecting the inner swinging member 19 and the other end of the outer swinging member 20. The connecting member 21 and the fixed seat 18 are respectively arranged at the two ends of the inner swinging member 19 and the outer swinging member 20. The connecting member 21 is connected to a roller 10 that is always in contact with the back side of the calf frame 2. The upper end of the third connecting rod 8 is hinged to the inner swinging member 19.

[0027] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A double-rod system linkage extension massage chair seat frame mechanism, comprising a backrest frame (1), a calf frame (2), and a base frame (3), wherein the front end of the backrest frame (1) is rotatably connected to the calf frame (2), and the rear end of the backrest frame (1) is rotatably connected to the base frame (3), and the base frame (3) drives the backrest frame (1) to swing through a driving electric cylinder (4), characterized in that: The transverse support pipe (5) is fixed to the bottom of the backrest frame (1), and its two ends are welded to the two sides of the backrest frame (1); the X-shaped hinge structure is formed by the second connecting rod (7) and the transverse support pipe (5) being cross-hinged; the lower end of the second connecting rod (7) is hinged to the upper end of the first connecting rod (6), and the lower end of the first connecting rod (6) is hinged to the base frame (3); the third connecting rod (8) has one end hinged to the upper end of the second connecting rod (7), and the other end is connected to the calf frame (2) through the leg frame linkage assembly (9); when the connecting rod assembly is in a folded state : The second connecting rod (7) and the third connecting rod (8) form a V-shaped layout with an opening facing the calf frame (2); the first connecting rod (6) and the second connecting rod (7) are compactly folded along the longitudinal direction of the base frame (3); when the connecting rod assembly is in the unfolded state: the driving electric cylinder (4) pushes the backrest frame (1) to tilt backward, the X-shaped hinge structure of the second connecting rod (7) and the transverse supporting pipe (5) unfolds, and the third connecting rod (8) moves upward with the second connecting rod (7) and pushes the leg frame linkage assembly (9) to unfold so that the calf frame (2) swings upward.

2. The double-rod system linkage extension massage chair seat frame mechanism according to claim 1, characterized in that: The upper middle portion of the second connecting rod (7) is cross-hinged with the transverse supporting pipe (5).

3. The double-rod system linkage extension massage chair seat frame mechanism according to claim 1, characterized in that: The transverse supporting pipe (5) is a steel pipe with a rectangular cross section, and the cross-hinged point between the transverse supporting pipe (5) and the second connecting rod (7) is located in the middle section of the transverse supporting pipe (5).

4. The double-rod system linkage extension massage chair seat frame mechanism according to claim 1, 2 or 3, characterized in that: The second connecting rod (7) comprises two second connecting plates symmetrically arranged on both sides of the transverse supporting pipe (5), and the upper middle part of the second connecting plate is hinged to the transverse supporting pipe (5).

5. The double-rod system linkage extension massage chair seat frame mechanism according to claim 1, 2 or 3, characterized in that: The base frame (3) is provided with a vertical connecting pipe (11), a connecting groove (12) is provided on the top of which, and the lower end of the first connecting rod (6) is embedded in the connecting groove (12) and fixed by a pin shaft.

6. The double-rod system linkage extension massage chair seat frame mechanism according to claim 1, characterized in that: Vertical support pipes (13) are fixed on both sides of the rear end of the base frame (3); both sides of the back frame (1) are hinged to the vertical support pipes (13) via a first hinge point (14); both sides of the front end of the back frame (1) are provided with steel frame support members (15); both ends of the steel frame support member (15) are hinged to the back frame (1) and the base frame (3) via a second hinge point (16) and a third hinge point (17), respectively.

7. The double-rod system linkage extension massage chair seat frame mechanism according to claim 1, characterized in that: The calf linkage support comprises a fixed seat (18) connected to the upper part of the backrest frame (1), an inner swinging member (19) hinged on the inner side of the fixed seat (18), an outer swinging member (20) hinged on the outer side of the fixed seat (18), and a connecting member (21) connecting the inner swinging member (19) and the other end of the outer swinging member (20); the connecting member (21) and the fixed seat (18) are respectively arranged at the two ends of the inner swinging member (19) and the outer swinging member (20); the connecting member (21) is connected to a roller (10) which is always in contact with the back side of the calf frame (2); and the upper end of the third connecting rod (8) is hinged to the inner swinging member (19).

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