Massage chair

Abstract

The invention discloses a massage chair which comprises a bottom frame, a seat frame, a backrest frame, a transition frame and side frames. The side frame is provided with a rotating joint part, and the rotating joint part is in rotating fit with the backrest frame; the side frame is further provided with at least one of a bottom frame sliding connection part, a seat frame sliding connection part and a backrest frame sliding connection part, the bottom frame sliding connection part is in sliding fit with the bottom frame, the seat frame sliding connection part is in sliding fit with the seat frame, and the backrest frame sliding connection part is in sliding fit with the backrest frame. According to the massage chair, the side frame is in running fit with the backrest frame and is also in sliding fit with at least one of the bottom frame, the seat frame and the backrest frame at the same time, so that the user armrests supported on the side frame can move along with the side frame, and when the armrest massage structures are mounted on the side frame, the armrest massage structures can massage the hands of the user according to the normal direction; and the massage effect can be ensured.

Description

Technical Field

[0001] The present invention relates to the technology of massage equipment, and specifically, to a massage chair. Background Art

[0002] Existing massage chairs generally include a seat part, a backrest part and a massage mechanism. There are two cooperation methods between the seat part and the backrest part. One of them is that the two are fixedly connected, and the massage mechanism can move between the seat part and the backrest part. The backrest of this type of massage chair cannot move relative to the seat part and cannot change the posture of supporting the user. The other cooperation method between the seat part and the backrest part is to set the backrest to be rotatable relative to the seat part. However, for this type of massage chair, the massage mechanism can only move on the backrest, and the massage area is relatively limited.

[0003] In view of the deficiencies of the foregoing solutions, the prior art discloses a solution idea. By arranging a transition part between the seat part and the backrest part to assist the massage mechanism to move, full-body massage is realized. For example, it is a massage chair with a segmented skeleton disclosed in the patent application CN202122460307.8. The massage chair of this application includes a backrest skeleton, a seat skeleton and a transition skeleton. One end of the transition skeleton is hinged with the backrest skeleton, and the other end of the transition skeleton is hinged with the seat skeleton. Rack bars are arranged on each skeleton.

[0004] For existing massage chairs adopting the technical solution of the patent application CN202122460307.8, the armrests of the massage chair are usually fixedly connected to the backrest skeleton or the seat skeleton. The disadvantage of this type of massage chair is that when the backrest skeleton rotates a certain arc relative to the seat skeleton, the user's hand supported by the armrest will move relative to the armrest, and the massage mechanism on the armrest cannot massage the user's hand in the normal orientation, affecting the massage effect. In view of this, the present application is specifically proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is how to solve the problem that the fixed connection of the armrest to the backrest skeleton or the seat skeleton in the existing massage chair affects the massage effect of the armrest massage structure.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: A massage chair, comprising: a chassis; a seat frame, on which a seat rack is disposed; a backrest frame, on which a backrest rack is disposed; a transition frame, which is located between the seat frame and the backrest frame and is respectively rotatably engaged with the two, and a transition rack is disposed on the transition frame, and the transition rack is located between the seat rack and the backrest rack; wherein, the massage chair further comprises a side frame, which is disposed on the outer sides of the seat frame and the backrest frame in the left-right direction and has a rotational engagement portion, and the rotational engagement portion is rotatably engaged with the backrest frame; wherein, the side frame further has at least one of a chassis sliding connection portion, a seat frame sliding connection portion and a backrest frame sliding connection portion, the chassis sliding connection portion is slidably engaged with the chassis, the seat frame sliding connection portion is slidably engaged with the seat frame, and the backrest frame sliding connection portion is slidably engaged with the backrest frame.

[0007] Preferably, the chassis has a seat frame guide rail and a backrest frame guide rail, the seat frame is supported on the seat frame guide rail through seat frame guide wheels, and the backrest frame is supported on the backrest frame guide rail through backrest frame guide wheels.

[0008] Preferably, the seat frame guide rail is a linear guide rail extending in the front-rear direction, and the backrest frame guide rail is an arc guide rail extending from the rear of the seat frame guide rail to the lower side of the seat frame guide rail.

[0009] Preferably, a driving mechanism for driving the seat frame to move relative to the chassis is installed between the chassis and the seat frame, or a driving mechanism for driving the backrest frame to move relative to the chassis is installed between the chassis and the backrest frame.

[0010] Preferably, the seat frame sliding connection portion is a chute that gradually slopes downward from back to front, and the chassis sliding connection portion is an arc chute extending from back to front.

[0011] Preferably, the chassis, the seat frame, and the backrest frame are slidably engaged with the corresponding sliding connection portions through rollers.

[0012] Preferably, a rear cover for shielding the rear side of the backrest frame is installed on the backrest frame, an electric control box is installed on the rear side of the chassis, and a movable shielding assembly is installed on the chassis between the lower side of the rear cover and the front side of the electric control box; the movable shielding assembly is slidably engaged with the chassis, and an elastic member is provided between it and the chassis. When the rear cover moves backward relative to the chassis as the backrest frame tilts backward, it pushes the movable shielding assembly to slide relative to the chassis and elastically deforms the elastic member.

[0013] Preferably, a first positioning assembly for positioning the rotational engagement position of the two is provided between the seat frame and the transition frame; and / or, a second positioning assembly for positioning the rotational engagement position of the two is provided between the backrest frame and the transition frame.

[0014] Preferably, a first kidney-shaped hole for rotatably engaging the transition frame is formed in the seat frame; and / or, a second kidney-shaped hole for rotatably engaging the transition frame is formed in the backrest frame.

[0015] Preferably, a first kidney-shaped hole for rotatably engaging the transition frame is formed in the seat frame, and a second kidney-shaped hole for rotatably engaging the transition frame is formed in the backrest frame (; the transition frame includes a first pin shaft passing through the first kidney-shaped hole, a seat frame sliding sleeve sleeved on the first pin shaft and slidably matched with the first kidney-shaped hole, a second pin shaft passing through the second kidney-shaped hole, and a backrest frame sliding sleeve sleeved on the second pin shaft and slidably matched with the second kidney-shaped hole.

[0016] Preferably, the first positioning component includes a first positioning rack and a first positioning gear. The first positioning rack is located outside the seat rack and the transition rack in the left-right direction and corresponds to their positions. The first positioning gear is arranged on the transition frame and meshes with the first positioning rack; the second positioning component includes a second positioning rack and a second positioning gear. The second positioning rack is located outside the backrest rack and the transition rack in the left-right direction and corresponds to their positions. The second positioning gear is arranged on the transition frame and meshes with the second positioning rack.

[0017] Preferably, the transition frame includes: a first pin shaft passing through and rotatably and slidably matched with the first kidney-shaped hole, a second pin shaft passing through and rotatably and slidably matched with the second kidney-shaped hole. The first positioning gear is sleeved on the first pin shaft, and the second positioning gear is sleeved on the second pin shaft.

[0018] Due to the adoption of the above technical solutions, the present invention has the following beneficial effects: 1. For the massage chair of the present application, the side frame is rotatably matched with the backrest frame and also slidably matched with at least one of the bottom frame, the seat frame and the backrest frame. Furthermore, the user armrest supported on the side frame can move along with the side frame. When an armrest massage structure is installed on the side frame, the armrest massage structure can massage the user's hand in a normal orientation, which helps to ensure the massage effect; 2. When the rear cover tilts backward relative to the bottom frame along with the backrest frame, it pushes the movable shielding component to slide relative to the bottom frame and elastically deforms the elastic member. This design ensures that the gap between the rear cover and the electric control box is always covered, and can prevent the user's limb from being accidentally clamped into the gap and causing injury. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present invention and do not limit the present invention.

[0020] Figures 1 to 3 Sketches of the massage chair according to the first embodiment are respectively shown from different perspectives; Figure 4 A diagram showing the change of the massage chair according to the first embodiment from the sitting posture state to the lying posture state is shown; Figure 5 A first exploded view of the massage chair according to the first embodiment is shown; Figure 6 A second exploded view of the massage chair according to the first embodiment is shown; Figure 7 A third exploded view of the massage chair according to the first embodiment is shown; Figure 8 A fourth exploded view of the massage chair according to the first embodiment is shown; Figure 9 A schematic diagram showing the chassis, the movable shielding component, and the elastic member during assembly according to the first embodiment is shown; Figure 10 A first exploded view of the chassis, the movable shielding component, and the elastic member according to the first embodiment is shown; Figure 11 A second exploded view of the chassis, the movable shielding component, and the elastic member according to the first embodiment is shown; Figure 12 A schematic diagram of the backrest frame of the massage chair according to the first embodiment is shown; Figure 13 An exploded view of the transition frame and the transition rack is shown.

[0021] Reference numerals: Chassis 1, seat frame guide rail 1A, backrest frame guide rail 1B, seat frame 2, backrest frame 3, transition frame 4, drive mechanism 5, side frame 6, positioning mechanism 7, limit mechanism 8, electric control box 9, movable shielding component 10, elastic member 11, rear cover G. Detailed implementation manners

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the drawings. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0023] The following will describe in detail some embodiments of the present invention with reference to the drawings. The features in the following embodiments can be combined with each other without conflict.

[0024] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

First Embodiment

[0025]

Chassis

[0026]

Seat Frame

[0027]

Backrest Frame

[0028]

Transition Frame

[0029] The rack support seat 4A is generally arc-shaped and has an upper wall, a lower wall, and side walls located between the upper wall and the lower wall. The transition rack P3 is installed on the rack support seat 4A (installed on the lower wall). The pressing member 4B is installed on the rack support seat 4A (installed on the upper wall). The pressing member 4B can press the traveling wheels of the massage mechanism to prevent the traveling rollers from jumping at the position of the transition frame 4. The connecting rod 4C is arranged on the outside of the rack support seat 4A in the left-right direction X. The connecting rod 4C and the side mounting plate 4H are spaced apart in the left-right direction X. The pivot rod T is located between the connecting rod 4C and the side mounting plate 4H. The first pin shaft 4D and the second pin shaft 4E extend in the left-right direction X. The first pin shaft 4D and the second pin shaft 4E connect the connecting rod 4C, the seat frame sliding sleeve 4F, and the backrest frame sliding sleeve 4G to the side mounting plate 4H. Combined with Figure 7, the first pin shaft 4D passes through the first waist-shaped hole S1, and the seat frame sliding sleeve 4F is sleeved on the first pin shaft 4D, and the seat frame sliding sleeve 4F is in sliding fit with the first waist-shaped hole S1. Thus, the first pin shaft 4D is rotationally and slidably fitted with the first waist-shaped hole S1 of the seat frame 2 through the seat frame sliding sleeve 4F, so that the transition frame 4 is rotationally and slidably fitted with the seat frame 2. The second pin shaft 4E passes through the second waist-shaped hole S2, and the backrest frame sliding sleeve 4G is sleeved on the second pin shaft 4E, and the backrest frame sliding sleeve 4G is in sliding fit with the second waist-shaped hole S2. Thus, the second pin shaft 4E is rotationally and slidably fitted with the second waist-shaped hole S2 of the backrest frame 3 through the backrest frame sliding sleeve 4G, so that the transition frame 4 is rotationally and slidably fitted with the backrest frame 3. Compared with circular holes, the design method of the first waist-shaped hole S1 and the second waist-shaped hole S2 adopted in this application can facilitate the assembly of the transition frame 4 with the seat frame 2 and the backrest frame 3.

[0030]

Drive mechanism

[0031]

Side frame

[0032]

Positioning mechanism

[0033] Combination Figure 7 and Figure 13 , the first positioning assembly 7A is located between the seat frame 2 and the transition frame 4, and is used to locate the rotational engagement position of the two. The second positioning assembly 7B is located between the backrest frame 3 and the transition frame 4, and is used to locate the rotational engagement position of the two. The first positioning assembly 7A includes a first positioning rack M1 and a first positioning gear N1. The first positioning rack M1 is installed on the seat frame 2. The first positioning gear N1 is sleeved on the first pin shaft 4D and clamped between the connecting rod 4C and the side mounting plate 4H. The first positioning rack M1 is located on the outside of the seat rack P1 and the transition rack P3 in the left-right direction X and corresponds to the positions of the two. The first positioning gear N1 is arranged on the transition frame 4 and meshes with the first positioning rack M1.

[0034] The second positioning assembly 7B includes a second positioning rack M2 and a second positioning gear N2. The second positioning gear N2 is sleeved on the second pin shaft 4E and clamped between the connecting rod 4C and the side mounting plate 4H. The second positioning rack M2 is installed on the backrest frame 3. The second positioning rack M2 is located outside the backrest rack P2 and the transition rack P3 in the left-right direction X and corresponds to the positions of the two. The second positioning gear N2 is arranged on the transition frame 4 and meshes with the second positioning rack M2. The parameters of the first positioning rack M1 correspond to the parameters of the seat rack P1 and the transition rack P3, the parameters of the second positioning rack M2 correspond to the parameters of the backrest rack P2 and the transition rack P3, and the first positioning gear N1 and the second positioning gear N2 correspond to the parameters of the running gear of the massage movement.

[0035] [Limiting mechanism] The limiting mechanism 8 is used to prevent the running wheels of the massage movement from jumping through the intersection of the seat frame 2 and the transition frame 4, and the intersection of the backrest frame 3 and the transition frame 4. Specifically, in this embodiment, the limiting mechanism 8 includes a seat side pressure strip 8A and a back side pressure strip 8B. The seat side pressure strip 8A is arranged on the seat frame 2 to prevent the running wheels of the massage movement from jumping through the intersection of the seat frame 2 and the transition frame 4. The back side pressure strip 8B is arranged on the backrest frame 3 to prevent the running wheels of the massage movement from jumping through the intersection of the backrest frame 3 and the transition frame 4.

[0036] [Electric control box] The electric control box 9 is installed on the rear side of the base frame 1 and is used to control the operation of the massage chair. The external power supply can be connected to the electric control box 9 via an electrical connecting line.

[0037] [Active shielding assembly] The active shielding assembly 10 is installed on the base frame 1 and is located between the lower side of the rear cover G and the front side of the electric control box 9. The active shielding assembly 10 is slidably matched with the base frame 1, and an elastic member 11 is provided between the active shielding assembly 10 and the base frame 1. Figure 4, when the back cover G tilts backward relative to the chassis 1 along with the backrest frame 3, it pushes the movable shielding assembly 10 to slide relative to the chassis 1 and elastically deforms the elastic member 11. Correspondingly, when the back cover G is lifted upward relative to the chassis 1 along with the backrest frame 3, the elastic member 11 returns to its original position, driving the shielding assembly 10 to return to its original position. The elastic member 11 is a telescopic spring, and one end thereof is hooked to the hook end 1E of the chassis 1.

[0038] Combined with Figures 9 to 11 , in this embodiment, the movable shielding assembly 10 includes a sliding cover 10A, an abutting member 10B, a sliding member 10C, a pin member 10D, and a connecting member 10E. The sliding cover 10A is connected to the connecting member 10E through the pin member 10D. The sliding member 10C is sleeved on the pin member 10D. The sliding member 10C is installed in the sliding groove 1D. The other end of the elastic member 11 is hooked to the connecting member 10E. The abutting member 10B is installed on the upper side of the sliding cover 10A and is located between the back cover G and the sliding cover 10A. The back cover G drives the movable shielding assembly 10 to move by pressing on the abutting member 10B. In this embodiment, both the abutting member 10B and the sliding member 10C are rollers. The sliding member 10C, the pin member 10D, and the connecting member 10E cooperate to form a sliding structure, and the sliding cover 10A is slidably engaged with the chassis 1 through the sliding structure. In this embodiment, there are two sliding structures, which are respectively arranged on the left and right sides of the sliding cover 10A. In Figures 9 to 11 In the embodiment, the elastic elongation and subsequent reset of the elastic member 11 drive the sliding cover 10A to return to its original position. However, it should be understood that the configuration position of the elastic member 11 can also be adjusted so that the elastic member 11 elastically contracts when the back cover G tilts relative to the chassis 1 along with the backrest frame 3, and then the elastic member 11 can be used to drive the sliding cover 10A to return to its original position when it resets.

[0039] The above is the specific description of the massage chair of the first embodiment. The side frame 6 is rotationally engaged with the backrest frame 3 and is also slidably engaged with the chassis 1, the seat frame 2, and the backrest 3 frame at the same time. Furthermore, the user armrest supported on the side frame 6 can move along with the side frame. When an armrest massage structure is installed on the side frame 6, the armrest massage structure can massage the user's hand in the normal orientation, which helps to ensure the massage effect. It should be understood that there can be other deformation design methods for this application.

[0040]

Second Embodiment

[0041]

Third Embodiment

[0042]

Fourth Embodiment

[0043]

Fifth Embodiment

[0044] Other features not mentioned in the second to fifth embodiments can be the same as those in the first embodiment and will not be elaborated here.

[0045]

Others

[0046] It should also be understood that in the first embodiment, the design concept of the chassis 1 can be applied to other massage chairs, and is not limited to the massage chair cooperating with the aforementioned side frames. That is to say, the present application further protects a massage chair, comprising: a chassis; a seat frame; a backrest frame; a transition frame, which is located between the seat frame and the backrest frame and is rotatably engaged with both of them respectively; the chassis has a seat frame guide rail and a backrest frame guide rail, the seat frame guide rail is a linear guide rail extending in the front-rear direction, and the backrest frame guide rail is an arc guide rail extending from the rear of the seat frame guide rail to the lower side of the seat frame guide rail; the seat frame is supported on the seat frame guide rail by seat frame guide wheels, and the backrest frame is supported on the backrest frame guide rail by backrest frame guide wheels. Preferably, the rear side of the backrest frame guide rail is spaced from the rear side of the seat frame guide rail, and the front side of the backrest frame guide rail is located below the front side of the seat frame guide rail. Preferably, a driving mechanism for driving the seat frame to move relative to the chassis is installed between the chassis and the seat frame, or a driving mechanism for driving the backrest frame to move relative to the chassis is installed between the chassis and the backrest frame. Preferably, a first positioning component for positioning the rotational engagement position of the seat frame and the transition frame is provided between the seat frame and the transition frame; and / or, a second positioning component for positioning the rotational engagement position of the backrest frame and the transition frame is provided between the backrest frame and the transition frame. Preferably, the first positioning component includes a first positioning rack and a first positioning gear, the first positioning rack is located outside the seat rack and the transition rack in the left-right direction and corresponds to their positions, and the first positioning gear is arranged on the transition frame and meshes with the first positioning rack; the second positioning component includes a second positioning rack and a second positioning gear, the second positioning rack is located outside the backrest rack and the transition rack in the left-right direction and corresponds to their positions, and the second positioning gear is arranged on the transition frame and meshes with the second positioning rack. Preferably, a first kidney-shaped hole for rotatably engaging the transition frame is provided on the seat frame; and / or, a second kidney-shaped hole for rotatably engaging the transition frame is provided on the backrest frame. Preferably, the transition frame includes: a first pin shaft passing through the first kidney-shaped hole, a seat frame sliding sleeve sleeved on the first pin shaft and slidably cooperating with the first kidney-shaped hole, a second pin shaft passing through the second kidney-shaped hole, and a backrest frame sliding sleeve sleeved on the second pin shaft and slidably cooperating with the second kidney-shaped hole. The backrest frame guide rail is an arc guide rail extending from the rear of the seat frame guide rail to the lower side of the seat frame guide rail, and the backrest frame is supported on the backrest frame guide rail by backrest frame guide wheels. Compared with the design scheme where the backrest frame guide rail does not extend to the lower side of the seat frame guide rail, the backrest frame of the solution of the present application can be tilted backward at a larger angle.

[0047] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A massage chair, comprising: A chassis (1); A seat frame (2) configured with a seat rack (P1) thereon; A backrest frame (3) configured with a backrest rack (P2) thereon; A transition frame (4) located between the seat frame (2) and the backrest frame (3) and rotatably engaged with both of them respectively. A transition rack (P3) is configured on the transition frame (4), and the transition rack (P3) is located between the seat rack (P1) and the backrest rack (P2); It is characterized in that Among them, The massage chair further comprises a side frame (6) arranged on the outer sides of the seat frame (2) and the backrest frame (3) in the left - right direction, and it has a rotational joint portion (6A), and the rotational joint portion (6A) is rotatably engaged with the backrest frame (3); Wherein, the side frame (6) further has at least one of a chassis sliding portion (6B), a seat frame sliding portion (6C) and a backrest frame sliding portion (6D). The chassis sliding portion (6B) is slidably engaged with the chassis (1), the seat frame sliding portion (6C) is slidably engaged with the seat frame (2), and the backrest frame sliding portion (6D) is slidably engaged with the backrest frame (3).

2. The massage chair according to claim 1, characterized in that, The chassis (1) has a seat frame guide rail (1A) and a backrest frame guide rail (1B). The seat frame (2) is supported on the seat frame guide rail (1A) by a seat frame guide wheel (2A), and the backrest frame (3) is supported on the backrest frame guide rail (1B) by a backrest frame guide wheel (3A).

3. The massage chair according to claim 2, wherein The seat frame guide rail (1A) is a linear guide rail extending in the front - rear direction, and the backrest frame guide rail (1B) is an arc - shaped guide rail extending from the rear of the seat frame guide rail (1A) to the lower side of the seat frame guide rail (1A).

4. The massage chair according to any one of claims 1 to 3, characterized in that, A driving mechanism (5) for driving the seat frame (2) to move relative to the chassis (1) is installed between the chassis (1) and the seat frame (2), or a driving mechanism (5) for driving the backrest frame (3) to move relative to the chassis (1) is installed between the chassis (1) and the backrest frame (3).

5. The massage chair according to claim 1, wherein A rear cover (G) for shielding the rear side of the backrest frame (3) is installed on the backrest frame (3), an electric control box (9) is installed on the rear side of the chassis (1), and a movable shielding assembly (10) is installed on the chassis (1) between the lower side of the rear cover (G) and the front side of the electric control box (9); The movable shielding assembly (10) is slidably engaged with the chassis (1), and an elastic member (11) is arranged between it and the chassis (1). When the rear cover (G) moves backward relative to the chassis (1) as the backrest frame (3) tilts backward, it pushes the movable shielding assembly (10) to slide relative to the chassis (1) and elastically deforms the elastic member (11).

6. The massage chair according to claim 1, wherein A first positioning assembly (7A) for positioning the rotational joint position between the seat frame (2) and the transition frame (4) is provided; and / or, a second positioning assembly (7B) for positioning the rotational joint position between the backrest frame (3) and the transition frame (4) is provided.

7. The massage chair according to claim 6, wherein The first positioning assembly (7A) includes a first positioning rack (M1) and a first positioning gear (N1). The first positioning rack (M1) is located outside the seat rack (P1) and the transition rack (P3) in the left-right direction and corresponds to their positions. The first positioning gear (N1) is arranged on the transition frame (4) and meshes with the first positioning rack (M1). The second positioning assembly (7B) includes a second positioning rack (M2) and a second positioning gear (N2). The second positioning rack (M2) is located outside the backrest rack (P2) and the transition rack (P3) in the left-right direction and corresponds to their positions. The second positioning gear (N2) is arranged on the transition frame (4) and meshes with the second positioning rack (M2).

8. The massage chair according to claim 1 or 6, characterized in that, A first kidney-shaped hole (S1) for rotatably engaging the transition frame (4) is formed in the seat frame (2); and / or, a second kidney-shaped hole (S2) for rotatably engaging the transition frame (4) is formed in the backrest frame (3).

9. The massage chair according to claim 8, characterized in that, The transition frame (4) includes: a first pin shaft (4D) passing through the first kidney-shaped hole (S1), a seat frame sliding sleeve (4F) sleeved on the first pin shaft (4D) and slidably matched with the first kidney-shaped hole (S1), a second pin shaft (4E) passing through the second kidney-shaped hole (S2), and a backrest frame sliding sleeve (4G) sleeved on the second pin shaft (4E) and slidably matched with the second kidney-shaped hole (S2).

10. The massage chair according to claim 7, characterized in that, A first kidney-shaped hole (S1) for rotatably engaging the transition frame (4) is formed in the seat frame (2), and a second kidney-shaped hole (S2) for rotatably engaging the transition frame (4) is formed in the backrest frame (3). The transition frame (4) includes: a first pin shaft (4D) passing through and rotatably and slidably matched with the first kidney-shaped hole (S1), and a second pin shaft (4E) passing through and rotatably and slidably matched with the second kidney-shaped hole (S2). The first positioning gear (N1) is sleeved on the first pin shaft (4D), and the second positioning gear (N2) is sleeved on the second pin shaft (4E).

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