CN218961215U - Double-movement massage chair frame and massage chair - Google Patents

Abstract

The utility model discloses a double-movement massage chair frame and a massage chair, wherein one end of an upper backrest frame and one end of a lower backrest frame of the double-movement massage chair frame are hinged on a shaft, the other end of the upper backrest frame is hinged with one end of a unfolding push rod, the other end of the unfolding push rod is hinged with the lower backrest frame, the other end of the lower backrest frame is hinged with one end of a backrest push rod, the other end of the backrest push rod is hinged with a base frame, the upper backrest frame is provided with an upper backrest frame movement sensing device which plays an upward stroke limiting role, the lower backrest frame is provided with a lower backrest frame movement sensing device which plays a downward stroke limiting role, the lower end of the upper movement is provided with an upper movement sensing device, and the upper end of the lower movement is provided with a lower movement sensing device which plays a combined massage role between the upper movement and the lower movement through sensing between the upper movement and the lower movement. Expansion of the expansion push rod can enable back and seat angle to change, experience comfort level is better, the range of massaging simultaneously with the double machine cores is larger, and massaging comfort level is stronger.

Description

Double-movement massage chair frame and massage chair

Technical Field

The utility model relates to the technical field of massage chairs, in particular to a double-movement massage chair frame and a massage chair.

Background

Patent application number 202120063417.8 discloses a seat and back angle deployable's antedisplacement zero gravity linkage massage armchair frame, including bottom seat frame, preceding support frame, back support frame, movable seat frame, seat frame gangbar and back swing mechanism, bottom seat frame, preceding support frame, back support frame and back support frame constitute a four bar linkage, and movable seat frame one end articulates back support frame or back support frame, and the other end of the articulated movable seat frame of one end of seat frame gangbar, the other end of seat frame gangbar articulates preceding support frame. When the backrest swinging mechanism pushes the backrest frame to swing, the seat frame linkage rod can push the movable seat frame to swing, and the seat frame moves forward when the backrest frame swings to achieve zero gravity adjustment, so that people can sit at rest and massage, the sitting posture is not more difficult, the massage is better stretched, and the effect of relaxation is achieved. However, the backrest section and the seat section of the movement of the structure are fixed as a whole, the movement included angle of the movement is always fixed, the actual experience effect is limited, and how to improve the defects of the prior art is the subject of the research of the utility model.

Patent application number 202023022752.8 discloses a massage machine comprising a seat frame member, a back frame member, a seat frame massage movement, and a back frame massage movement; the massage machine is provided with a composite walking area positioned at the joint position of a seat frame component and a back frame component, the seat frame component is provided with a first guide rail part positioned in the composite walking area, and the back frame component is provided with a second guide rail part positioned in the composite walking area; the first guide rail part and the second guide rail part are arranged in a staggered manner, the seat frame massage machine core and the back frame massage machine core are allowed to move correspondingly to the composite walking area respectively, the first guide rail part and the second guide rail part of the massage machine are arranged in a staggered manner, the seat frame massage machine core and the back frame massage machine core can move correspondingly to the composite walking area respectively, and the moving range of the seat frame massage machine core and the back frame massage machine core is larger. However, the stroke of the massage machine core with the structure seat frame is limited, and the massage machine core can not move to the back frame, so that how to solve the defects of the prior art is another object of the research of the utility model.

Disclosure of Invention

Therefore, the utility model provides a double-movement massage armchair frame which solves the problems in the prior art.

In order to achieve the above object, the present utility model provides the following technical solutions:

according to a first aspect of the present utility model, a dual-deck massage chair frame comprises an upper back frame, a lower back frame, an upper deck, a lower deck, a base frame, a back push rod, a deployment push rod, and a shaft;

one end of the upper backrest frame and one end of the lower backrest frame are hinged to the shaft, and the back side of the upper backrest frame is hinged to the fixed end of the unfolding push rod;

the idler wheels arranged on the side face of the upper backrest frame are connected in a sliding rail arranged on the base frame in a sliding way;

the telescopic end of the unfolding push rod is hinged with one end of the lower backrest frame, the back side of the lower backrest frame is hinged with the fixed end of the backrest push rod, and the telescopic end of the backrest push rod is hinged on the base frame.

Further, the device also comprises an upper backrest frame movement sensing device and a lower backrest frame movement sensing device;

the upper backrest frame is provided with the upper backrest frame movement sensing device, and plays a role in limiting the upward stroke of the upper movement;

the lower backrest frame is provided with the lower backrest frame movement sensing device, and plays a role in limiting the downward stroke of the lower movement.

Further, the device also comprises an upper movement induction device and a lower movement induction device;

the lower end of the upper machine core is provided with the upper machine core induction device;

the upper end of the lower core is provided with the lower core induction device;

through last core induction system with the response between the core induction system down, can keep go up the core with the core leaves minimum safe distance down, avoid go up the core with down the core takes place the collision interference in the massage walking in-process, play go up the core with the combination massage effect between the core down.

Further, the device also comprises a limit pin assembly; at the arc section rotating around the shaft, the upper backrest frame is provided with two first protruding structures and a first concave structure, wherein the first protruding structure at the lower end is provided with a round hole, and the first concave structure is provided with a long round hole;

at the arc section rotating around the shaft, the lower backrest frame is provided with a second protruding structure and two second recessed structures, wherein the first protruding structure is provided with a round hole, and the second recessed structure at the lower end is provided with a long round hole;

the first protruding structure at the lower end of the upper backrest frame is in cross fit with the second recessed structure at the lower end of the lower backrest frame and is connected through the limiting pin assembly;

the first concave structure of the upper backrest frame is in cross fit with the second convex structure of the lower backrest frame and is connected through the limit pin assembly;

the first protruding structure at the upper end of the upper backrest frame is in cross free fit with the second recessed structure at the upper end of the lower backrest frame;

the limiting pin assembly plays a role in enhancing the connection strength and the motion stability of the upper backrest frame and the lower backrest frame.

Further, the device also comprises an upper backrest frame movement walking guide rail and a lower backrest frame movement walking guide rail;

the upper backrest frame is provided with an upper backrest frame movement walking guide rail, the lower backrest frame is provided with a lower backrest frame movement walking guide rail, and the upper backrest frame movement walking guide rail and the lower backrest frame movement walking guide rail are in smooth transition butt joint in an arc section taking the axial point as the center;

the upper machine core and the lower machine core can freely walk in the guide rail, and the track lines of the travelling wheels of the machine cores are coincident.

Further, the first protruding structure and the first recessed structure of the upper backrest frame and the second protruding structure and the second recessed structure of the lower backrest frame always have overlapped supporting surfaces corresponding to the movement walking in the movement walking guide rail of the backrest frame in the whole course of movement;

the upper back frame movement walking guide rail of the upper back frame and the lower back frame movement walking guide rail of the lower back frame are in overlapping tangent continuous smooth transition during any angle rotation adjustment, so that the movement walking guide rails of the upper back frame and the lower back frame form a complete movement walking guide rail.

Further, when the first protruding structure and the first recessed structure of the upper back frame and the second protruding structure and the second recessed structure of the lower back frame are in a minimum rotation overlapping state around the shaft, the movement roller is respectively supported by the first protruding structure and the second recessed structure of the upper back frame when the upper back frame and the lower back frame transition section walk;

when the first protruding structure and the first recessed structure of the upper backrest frame and the second protruding structure and the second recessed structure of the lower backrest frame rotate around the shaft to be in the largest overlapping state, the movement roller is simultaneously supported by the first protruding structure and the second recessed structure of the upper backrest frame when the upper backrest frame and the lower backrest frame transition section walk.

Further, the device also comprises a rack, an upper core driving wheel, an upper core traveling gear, an upper core driven wheel, a lower core driving wheel, a lower core traveling gear and a lower core driven wheel;

the continuous racks are arranged on the upper backrest frame movement walking guide rail,

the two sides of the upper machine core are respectively provided with a group of upper machine core driving wheel, an upper machine core walking gear and an upper machine core driven wheel, the upper machine core driving wheel and the upper machine core walking gear are closely positioned at one end of the upper machine core, the upper machine core driven wheel is positioned at the other end of the upper machine core, the upper machine core walking gear and the rack are in meshing relation to provide walking power, and the movement track of the upper machine core driving wheel and the movement track of the upper machine core driven wheel are the same track in a machine core walking guide rail;

the lower machine core is characterized in that a group of lower machine core driving wheels, lower machine core walking gears and lower machine core driven wheels are respectively arranged on two sides of the lower machine core, the lower machine core driving wheels and the lower machine core walking gears are closely located at one end of the lower machine core, the lower machine core driven wheels are located at the other end of the lower machine core, the lower machine core walking gears and the racks are in meshing relation to provide walking power, and the movement tracks of the lower machine core driving wheels and the lower machine core driven wheels are the same track in a machine core walking guide rail.

Further, the leg beautifying device also comprises a leg beautifying frame, wherein the upper part of the leg beautifying frame is hinged to the front side of the lower backrest frame, and the leg beautifying frame is connected with a leg beautifying swinging mechanism for pushing the leg beautifying frame to swing;

the leg beautifying swinging mechanism comprises a leg pushing and lifting frame, a leg beautifying push rod and a supporting roller; the leg pushing and lifting frame is hinged to the lower backrest frame, the middle of the leg pushing and lifting frame is hinged to one end of the leg beautifying push rod, the other end of the leg beautifying push rod is hinged to the lower backrest frame, the lower end of the leg pushing and lifting frame is connected with the supporting roller, and the supporting roller is arranged on the rear side of the leg beautifying frame.

According to a second aspect of the utility model, a massage chair comprises a dual-core massage chair frame as in any of the first aspects of the utility model.

The utility model has the following advantages: the device adopts a sliding rail structure, so that the stability and the assembly convenience are better; secondly, the structure can enable the upper backrest frame and the lower backrest frame to independently realize the functions of angle unfolding and continuous change, and the experience comfort level is better; and the front part of the backrest frame is also provided with a leg beautifying frame, so that the leg beautifying frame can support legs and is matched with the independent adjustment of the leg beautifying push rod to form a set of complete massage chair function, and finally, the range of massaging simultaneously by matching with the double machine cores is larger, and the massage comfort is stronger.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.

The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the utility model, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present utility model, should fall within the ambit of the technical disclosure.

Fig. 1 is a schematic side sectional view of an initial state of a dual-movement massage armchair frame according to some embodiments of the present utility model.

Fig. 2 is an exploded view of a dual-core massage armchair frame according to some embodiments of the present utility model.

Fig. 3 is an axial schematic view of an initial state (in which the upper and lower cores independently move) of a dual-core massage armchair frame according to some embodiments of the present utility model.

Fig. 4 is an axial schematic view of an initial state (combined movement of upper and lower cores) of a dual-core massage armchair frame according to some embodiments of the present utility model.

Fig. 5 is a schematic side sectional view of a dual-movement massage armchair frame in a zero gravity state (with the seat undeployed) according to some embodiments of the present utility model.

Fig. 6 is a schematic side sectional view of a dual-movement massage armchair frame in a zero gravity state (with the seat extended) according to some embodiments of the present utility model.

Fig. 7 is a schematic axial view of a dual-movement massage chair frame in a zero gravity state (in which the upper and lower movements move independently), according to some embodiments of the present utility model.

Fig. 8 is a schematic axial view of a dual-movement massage armchair frame in a zero gravity state (combined movement of upper and lower movements) according to some embodiments of the present utility model.

Fig. 9 is a schematic side view of a connecting shaft of an upper backrest and a lower backrest of a dual-movement massage armchair frame according to some embodiments of the present utility model.

Fig. 10 is a schematic diagram illustrating a connection between an upper backrest and a lower backrest of a dual-movement massage armchair frame according to some embodiments of the present utility model.

In the figure:

1. the device comprises an upper backrest frame, a 101 upper backrest frame movement induction device, 102, an upper backrest frame movement walking guide rail, 103 and a roller;

2. the upper machine core comprises an upper machine core 201, an upper machine core induction device 202, an upper machine core driving wheel 203, an upper machine core walking gear 204 and an upper machine core driven wheel;

3. the lower machine core comprises a lower machine core 301, a lower machine core induction device 302, a lower machine core driving wheel 303, a lower machine core walking gear 304 and a lower machine core driven wheel;

4. the lower backrest frame comprises a lower backrest frame body, 401, a lower backrest frame movement sensing device, 402 and a lower backrest frame movement walking guide rail;

5. leg pushing and lifting frame 6, leg beautifying frame 7, leg beautifying push rod 8, unfolding push rod 9, backrest push rod 10, base frame 1001, slide rail 11, limit pin assembly 12, rack 13, support roller, a and shaft.

Detailed Description

Other advantages and advantages of the present utility model will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 10, a dual movement massage chair frame in the first embodiment of the present utility model includes an upper back frame 1, a lower back frame 4, an upper movement 2, a lower movement 3, a base frame 10, a back push rod 9, a deployment push rod 8, and a shaft a; one end of the upper backrest frame 1 and one end of the lower backrest frame 4 are hinged on a shaft a, and the back side of the upper backrest frame 1 is hinged on the fixed end of the unfolding push rod 8; the roller 103 arranged on the side surface of the upper backrest frame 1 is connected in a sliding way 1001 arranged on the base frame 10 in a sliding way; the telescopic end of the unfolding push rod 8 is hinged with one end of the lower backrest frame 4, the back side of the lower backrest frame 4 is hinged with the fixed end of the backrest push rod 9, and the telescopic end of the backrest push rod 9 is hinged with the base frame 10.

The technical effects achieved by the embodiment are as follows: the device adopts a sliding rail structure, so that the stability and the assembly convenience are better; secondly, the structure can enable the upper backrest frame and the lower backrest frame to independently realize the functions of angle unfolding and continuous change, and the experience comfort level is better; and the front part of the backrest frame is also provided with a leg beautifying frame, so that the leg beautifying frame can support legs and is matched with the independent adjustment of the leg beautifying push rod to form a set of complete massage chair function, and finally, the range of massaging simultaneously by matching with the double machine cores is larger, and the massage comfort is stronger.

Optionally, as shown in fig. 1 to 10, in some embodiments, the device further includes an upper back rest movement sensing device 101 and a lower back rest movement sensing device 401; the upper backrest frame 1 is provided with an upper backrest frame movement sensing device 101 which plays a role in limiting the upward stroke of the upper movement 2; the lower back frame 4 is provided with a lower back frame movement sensing device 401, which plays a role in limiting the downward stroke of the lower movement 3.

Optionally, as shown in fig. 1 to 10, in some embodiments, an upper deck sensing device 201 and a lower deck sensing device 301 are further included; the lower end of the upper movement 2 is provided with an upper movement induction device 201; the upper end of the lower core 3 is provided with a lower core induction device 301; through the induction between the upper movement induction device 201 and the lower movement induction device 301, the minimum safety distance between the upper movement 2 and the lower movement 3 can be kept, collision interference between the upper movement 2 and the lower movement 3 in the massage walking process is avoided, and the combined massage effect between the upper movement 2 and the lower movement 3 is achieved.

Optionally, as shown in fig. 1 to 10, in some embodiments, a stop pin assembly 11 is further included; at the arc section rotating around the axis a, the upper backrest frame 1 is provided with two first protruding structures and a first concave structure, wherein the first protruding structure at the lower end is provided with a round hole, and the first concave structure is provided with a long round hole; at the arc section rotating around the axis a, the lower backrest frame 4 is provided with a second protruding structure and two second concave structures, wherein the first protruding structure is provided with a round hole, and the second concave structure at the lower end is provided with a long round hole; the first protruding structure at the lower end of the upper backrest frame 1 is in cross fit with the second recessed structure at the lower end of the lower backrest frame 4 and is connected through a limit pin assembly 11; the first concave structure of the upper backrest frame 1 is in cross fit with the second convex structure of the lower backrest frame 4 and is connected through a limit pin assembly 11; the first protruding structure at the upper end of the upper backrest frame 1 is freely matched with the second recessed structure at the upper end of the lower backrest frame 4 in a crossing way; the limit pin assembly 11 plays a role in reinforcing the connection strength and the movement stability of the upper back rest 1 and the lower back rest 4.

Optionally, as shown in fig. 1-10, in some embodiments, an upper back rest movement travel rail 102 and a lower back rest movement travel rail 402 are also included; the upper backrest frame 1 is provided with an upper backrest frame movement walking guide rail 102, the lower backrest frame 4 is provided with a lower backrest frame movement walking guide rail 402, and the upper backrest frame movement walking guide rail 102 and the lower backrest frame movement walking guide rail 402 are in smooth transition butt joint in an arc section taking a point of a winding shaft as a center; the upper movement 2 and the lower movement 3 can freely walk in the guide rail, and the track lines of the movement traveling wheels are coincident.

Alternatively, as shown in fig. 1 to 10, in some embodiments, the first protruding structure and the first recessed structure of the upper back rest 1 and the second protruding structure and the second recessed structure of the lower back rest 4 always have overlapping supporting surfaces corresponding to the movement walking in the movement walking guide rail of the back rest during the whole course of movement; the upper back frame movement walking guide rail 102 of the upper back frame 1 and the lower back frame movement walking guide rail 402 of the lower back frame 4 are overlapped, tangent, continuous and smooth in transition during any angle rotation adjustment, so that the movement walking guide rails of the upper back frame and the lower back frame form a complete movement walking guide rail.

Alternatively, as shown in fig. 1 to 10, in some embodiments, when the first protruding structure and the first recessed structure of the upper back rest 1 and the second protruding structure and the second recessed structure of the lower back rest 4 are in a minimum rotation overlapping state about the axis a, the movement roller is supported by the first protruding structure of the upper back rest 1 and the second recessed structure of the lower back rest 4, respectively, when the upper back rest 1 and the lower back rest 4 travel at the transition section; when the first protruding structure and the first recessed structure of the upper backrest frame 1 and the second protruding structure and the second recessed structure of the lower backrest frame 4 are in the largest rotation overlapping state around the axis a, the movement roller is simultaneously supported by the first protruding structure of the upper backrest frame 1 and the second recessed structure of the lower backrest frame 4 when the upper backrest frame 1 and the lower backrest frame 4 transition section walk.

Optionally, as shown in fig. 1-10, in some embodiments, further includes a rack 12, an upper deck drive wheel 202, an upper deck travel gear 203, an upper deck driven wheel 204, a lower deck drive wheel 302, a lower deck travel gear 303, and a lower deck driven wheel 304; the upper back frame movement walking guide rail 102 is provided with a continuous rack 12, two sides of the upper movement 2 are respectively provided with a group of upper movement driving wheel 202, an upper movement walking gear 203 and an upper movement driven wheel 204, the upper movement driving wheel 202 and the upper movement walking gear 203 are closely positioned at one end of the upper movement 2, the upper movement driven wheel 204 is positioned at the other end of the upper movement 2, the upper movement walking gear 203 and the rack 12 provide walking power for meshing relationship, and the movement track of the upper movement driving wheel 202 and the movement track of the upper movement driven wheel 204 are the same track in the movement walking guide rail; a group of lower core driving wheel 302, a lower core traveling gear 303 and a lower core driven wheel 304 are respectively arranged on two sides of the lower core 3, the lower core driving wheel 302 and the lower core traveling gear 303 are closely positioned at one end of the lower core 3, the lower core driven wheel 304 is positioned at the other end of the lower core 3, the lower core traveling gear 303 and the rack 12 provide traveling power for a meshing relationship, and the motion track of the lower core driving wheel 302 and the motion track of the lower core driven wheel 304 are the same track in the core traveling guide rail.

Optionally, as shown in fig. 1 to 10, in some embodiments, the leg rest 6 is further included, an upper portion of the leg rest 6 is hinged to a front side of the lower back rest 4, and the leg rest 6 is connected with a leg rest swing mechanism for pushing the leg rest to swing; the leg beautifying swinging mechanism comprises a leg pushing and lifting frame 5, a leg beautifying push rod 7 and a supporting roller 13; the upper end of the leg pushing and lifting frame 5 is hinged with the lower backrest frame 4, the middle of the leg pushing and lifting frame 5 is hinged with one end of the leg beautifying push rod 7, the other end of the leg beautifying push rod 7 is hinged with the lower backrest frame 4, the lower end of the leg pushing and lifting frame 5 is connected with the supporting roller 13, and the supporting roller 13 is arranged on the rear side of the leg beautifying frame 6.

As shown in fig. 1 to 10, a massage armchair according to a second aspect of the present utility model is characterized by comprising a double movement massage armchair frame according to any of the embodiments of the first aspect of the present utility model.

The working principle of the above embodiment: referring to fig. 5 to 8, when the lower back frame 4 is driven by the back push rod 9, the lower back frame 4 drives the upper back frame 1 to move, and the rollers 103 on the upper back frame 1 simultaneously move along the slide rails 1001 of the base frame 10; when the unfolding push rod 8 moves, the included angle between the upper backrest frame 1 and the lower backrest frame 4 is adjusted and changed; when the leg beautifying push rod 7 moves, the height of the leg beautifying frame 6 can be adjusted and changed; namely: when the backrest push rod 9 is pushed out, a lying state trend is formed; when the backrest push rod 9 is retracted, an initial state trend is formed; when the unfolding push rod 8 is retracted, the included angle between the upper backrest frame 1 and the lower backrest frame 4 is changed from small to large, so that an unfolding trend is formed, and when the unfolding push rod 8 is pushed out, the included angle between the upper backrest frame 1 and the lower backrest frame 4 is changed from large to small, so that a shrinkage trend is formed; when the leg-building push rod 7 is pushed out, the leg-building frame increases in height, and when the leg-building push rod 7 is retracted, the leg-building frame decreases in height.

While the utility model has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model as claimed.

The terms such as "upper", "lower", "left", "right", "middle" and the like are also used in the present specification for convenience of description, but are not intended to limit the scope of the present utility model, and the changes or modifications of the relative relationship thereof are considered to be within the scope of the present utility model without substantial modification of the technical content.

Claims (10)

1. The double-movement massage chair frame is characterized by comprising an upper backrest frame (1), a lower backrest frame (4), an upper movement (2), a lower movement (3), a base frame (10), a backrest push rod (9), an unfolding push rod (8) and a shaft (a);

one end of the upper backrest frame (1) and one end of the lower backrest frame (4) are hinged to the shaft (a), and the back side of the upper backrest frame (1) is hinged to the fixed end of the unfolding push rod (8);

the roller (103) arranged on the side surface of the upper backrest frame (1) is connected in a sliding rail (1001) arranged on the base frame (10) in a sliding way;

the telescopic end of the unfolding push rod (8) is hinged with one end of the lower backrest frame (4), the back side of the lower backrest frame (4) is hinged with the fixed end of the backrest push rod (9), and the telescopic end of the backrest push rod (9) is hinged on the base frame (10).

2. The double-movement massage chair frame according to claim 1, further comprising an upper back frame movement sensing device (101) and a lower back frame movement sensing device (401);

the upper backrest frame (1) is provided with the upper backrest frame movement sensing device (101) and plays a role in limiting the upward stroke of the upper movement (2);

the lower backrest frame (4) is provided with the lower backrest frame movement sensing device (401) and plays a role in limiting the downward stroke of the lower movement (3).

3. A dual cartridge massage armchair frame according to claim 1, characterized in that it further comprises upper cartridge induction means (201) and lower cartridge induction means (301);

the lower end of the upper movement (2) is provided with the upper movement induction device (201);

the upper end of the lower core (3) is provided with the lower core induction device (301);

through last core induction system (201) with the response between lower core induction system (301) can keep go up core (2) with lower core (3) leave minimum safe distance, avoid go up core (2) with lower core (3) take place the collision interference in massage walking in-process, play go up core (2) with combination massage effect between lower core (3).

4. A dual movement massage armchair frame according to claim 1, characterized in that it further comprises a limit pin assembly (11); at the arc section rotating around the shaft (a), the upper backrest frame (1) is provided with two first protruding structures and a first concave structure, wherein the first protruding structure at the lower end is provided with a round hole, and the first concave structure is provided with a long round hole;

at the arc section rotating around the shaft (a), the lower backrest frame (4) is provided with a second protruding structure and two second concave structures, wherein the first protruding structure is provided with a round hole, and the second concave structure at the lower end is provided with a long round hole;

the first protruding structure at the lower end of the upper backrest frame (1) is in cross fit with the second recessed structure at the lower end of the lower backrest frame (4) and is connected through the limit pin assembly (11);

the first concave structure of the upper backrest frame (1) is in cross fit with the second convex structure of the lower backrest frame (4) and is connected through the limit pin assembly (11);

the first protruding structure at the upper end of the upper backrest frame (1) is freely matched with the second recessed structure at the upper end of the lower backrest frame (4) in a crossing way;

the limiting pin assembly (11) plays a role in reinforcing the connection strength and the motion stability of the upper backrest frame (1) and the lower backrest frame (4).

5. The dual-core massage armchair frame according to claim 4, further comprising an upper back frame core travel rail (102) and a lower back frame core travel rail (402);

the upper backrest frame (1) is provided with an upper backrest frame movement walking guide rail (102), the lower backrest frame (4) is provided with a lower backrest frame movement walking guide rail (402), and the upper backrest frame movement walking guide rail (102) and the lower backrest frame movement walking guide rail (402) are in smooth transition butt joint in an arc section taking a point (a) of the shaft as a center;

the upper movement (2) and the lower movement (3) can freely walk in the guide rail, and the track lines of the movement traveling wheels are coincident.

6. The double-movement massage chair frame according to claim 5, characterized in that the first protruding structure and the first recessed structure of the upper back frame (1) and the second protruding structure and the second recessed structure of the lower back frame (4) always have overlapping supporting surfaces corresponding to movements walking in the back frame movement walking guide rail during the whole movement;

the upper back frame movement walking guide rail (102) of the upper back frame (1) and the lower back frame movement walking guide rail (402) of the lower back frame (4) are overlapped, tangent, continuous and smooth in transition when any angle is adjusted in a rotating way, so that the movement walking guide rails of the upper back frame and the lower back frame form a complete movement walking guide rail.

7. A dual movement massage chair frame according to claim 6, characterized in that the first protruding structure and the first recessed structure of the upper back frame (1) and the second protruding structure and the second recessed structure of the lower back frame (4) are supported by the first protruding structure of the upper back frame (1) and the second recessed structure of the lower back frame (4), respectively, when the movement roller walks in the transition section of the upper back frame (1) and the lower back frame (4), when the rotational overlap state around the axis (a) is minimal;

when the first protruding structure and the first recessed structure of the upper backrest frame (1) and the second protruding structure and the second recessed structure of the lower backrest frame (4) are in the largest rotation overlapping state around the shaft (a), the movement roller is simultaneously supported by the first protruding structure of the upper backrest frame (1) and the second recessed structure of the lower backrest frame (4) when the upper backrest frame (1) and the lower backrest frame (4) transition section walk.

8. The dual-deck massage armchair frame according to claim 7, further comprising a rack (12), an upper deck driving wheel (202), an upper deck traveling gear (203), an upper deck driven wheel (204), a lower deck driving wheel (302), a lower deck traveling gear (303) and a lower deck driven wheel (304);

the continuous racks (12) are arranged on the upper backrest frame movement walking guide rail (102),

the two sides of the upper machine core (2) are respectively provided with a group of upper machine core driving wheel (202), an upper machine core walking gear (203) and an upper machine core driven wheel (204), the upper machine core driving wheel (202) and the upper machine core walking gear (203) are closely positioned at one end of the upper machine core (2), the upper machine core driven wheel (204) is positioned at the other end of the upper machine core (2), the upper machine core walking gear (203) and the rack (12) provide walking power for meshing relationship, and the movement track of the upper machine core driving wheel (202) and the movement track of the upper machine core driven wheel (204) are the same track in a machine core walking guide rail;

the lower machine core is characterized in that a group of lower machine core driving wheels (302), lower machine core walking gears (303) and lower machine core driven wheels (304) are also respectively arranged on two sides of the lower machine core (3), the lower machine core driving wheels (302) and the lower machine core walking gears (303) are closely located at one end of the lower machine core (3), the lower machine core driven wheels (304) are located at the other end of the lower machine core (3), the lower machine core walking gears (303) and the racks (12) provide walking power for meshing relation, and the movement track of the lower machine core driving wheels (302) and the movement track of the lower machine core driven wheels (304) are the same track in a machine core walking guide rail.

9. The double-movement massage chair frame according to claim 8, further comprising a leg-beautifying frame (6), wherein the upper part of the leg-beautifying frame (6) is hinged to the front side of the lower backrest frame (4), and the leg-beautifying frame (6) is connected with a leg-beautifying swinging mechanism for pushing the leg-beautifying frame to swing;

the leg beautifying swinging mechanism comprises a leg pushing and lifting frame (5), a leg beautifying push rod (7) and a supporting roller (13); the leg pushing and lifting frame is characterized in that the upper end of the leg pushing and lifting frame (5) is hinged to the lower backrest frame (4), the middle of the leg pushing and lifting frame (5) is hinged to one end of the leg beautifying push rod (7), the other end of the leg beautifying push rod (7) is hinged to the lower backrest frame (4), the lower end of the leg pushing and lifting frame (5) is connected with the supporting roller (13), and the supporting roller (13) is arranged on the rear side of the leg beautifying frame (6).

10. A massage chair comprising a dual movement massage chair frame as claimed in any one of claims 1 to 9.

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