A head cover linkage mechanism for a massage chair

Abstract

The utility model discloses a head cover linkage mechanism for massage chair, including seat frame, backrest frame, handrail, drive mechanism and head cover linkage mechanism. Head cover linkage mechanism is by traction belt, a plurality of direction pieces, pull rod, rotating support and head cover constitute. Traction belt first end is fixed in seat frame, and the end is connected pull rod through direction piece, pull rod is slidably and rotatably arranged in the rotating support of backrest frame head portion, the middle part of head cover is articulated in handrail support rod, and the rear end is articulated with pull rod end portion. When drive mechanism drives backrest frame to lie down, backrest frame lies down relative seat frame, and traction belt is pulled out, and rotating support moves to pull rod lower part, and head cover is automatically followed under the action of gravity and falls, provides the private space and head shielding for user. Conversely, when backrest frame stands, head cover is automatically lifted under the action of traction belt. The utility model discloses simple structure, and the linkage is reliable, and effectively promotes the use experience.

Description

Technical Field

[0001] This utility model relates to the field of massage chair technology, and in particular to a head cover linkage mechanism for a massage chair. Background Technology

[0002] Most massage chairs on the market currently use fixed or simple adjustable headrests, which cannot automatically adjust the headrest position according to the user's posture. When the massage chair changes from an upright to a reclining position, the headrest often fails to move down synchronously, resulting in a lack of effective head support and protection for the user while lying down, affecting comfort and privacy. In addition, some adjustable headrests have complex structures, high manufacturing costs, and the adjustment process relies on electric or manual control, which is inconvenient to operate and has low reliability.

[0003] To address the aforementioned issues, while some existing massage chairs have attempted to employ linkage mechanisms, their structures often suffer from unstable transmission, making it difficult to achieve automatic synchronous linkage between the headrest and the chair back. Therefore, it is necessary to propose a headrest mechanism that can automatically adjust in conjunction with changes in the posture of the massage chair. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a head cover linkage mechanism for a massage chair.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a headrest linkage mechanism for a massage chair, comprising a seat frame, a backrest frame, armrests, and a drive mechanism. The drive mechanism is disposed between the seat frame and the backrest frame and is used to drive the backrest frame to switch between an upright state and a reclining state relative to the seat frame. The armrests are fixed to both sides of the backrest frame. The headrest linkage mechanism also includes: a traction strap, the first end of which is fixed to a support point disposed on the seat frame; a plurality of guide members, spaced apart along the back curve of the backrest frame, through which the traction strap passes in sequence; a pull rod connected to the end of the traction strap; a rotating support, disposed on the backrest frame at a position corresponding to the user's head, through which the pull rod is slidably and rotatably inserted; and a headrest, the middle portion of which is hinged to a support rod fixed to the armrest, and the rear end of which is hinged to the end of the pull rod.

[0006] As a preferred embodiment of this utility model, the traction belt includes at least two sections of traction belt, and adjacent sections of traction belt are connected by a tension spring.

[0007] As a preferred technical solution of this utility model, the guide component is a guide rail steel frame, on which a guide seat is provided; the guide seat has a guide hole or guide groove for the pull belt to pass through.

[0008] As a preferred technical solution of this utility model, at least one section of the pull belt is fixedly provided with a limiting block, the limiting block is located between two adjacent guide seats, and can move with the pull belt and abut against the corresponding guide seat.

[0009] As a preferred embodiment of this utility model, there are two limiting blocks, which are respectively disposed on both sides of one section of the pull strap, and are used to abut against the two adjacent guide seats respectively.

[0010] As a preferred embodiment of this utility model, a U-shaped support frame is fixed on the seat frame, and the first end of the traction belt is fixed to the upper surface of the U-shaped support frame.

[0011] As a preferred embodiment of the present invention, the rotating support includes a support base fixed to the head area of ​​the backrest frame and a rotating sleeve rotatably housed within the support base; a sliding hole is formed inside the rotating sleeve, and the pull rod is slidably inserted through the sliding hole.

[0012] In a preferred embodiment of this invention, the cross-section of the sliding hole of the rotating sleeve and the cross-section of the pull rod are both rectangular and matched.

[0013] As a preferred embodiment of this utility model, the driving mechanism is an electric push rod; the rear end of the cylinder of the electric push rod is hinged to the seat frame, and its front end is hinged to the backrest frame.

[0014] As a preferred embodiment of this utility model, mounting rods are fixed on both sides of the backrest frame, and pulleys are installed at both ends of the mounting rods; arc-shaped slide rails are correspondingly provided on both sides of the seat frame, and the pulleys are rotatably embedded in the arc-shaped slide rails and move along their trajectory.

[0015] In summary, the beneficial effects of this utility model are as follows: By setting up a mechanical linkage mechanism consisting of a traction belt, guide member, pull rod, and rotating support, automatic and synchronous linkage of the headgear and backrest frame posture is achieved. When the drive mechanism drives the backrest frame to recline, the backrest frame reclines relative to the seat frame, the traction belt is pulled out, the rotating support moves to the lower part of the pull rod, and the headgear automatically descends under the action of gravity, providing the user with a private space and head protection. Conversely, when the backrest frame is upright, the headgear automatically rises under the action of the traction belt. The entire transmission mechanism is based on pure mechanical linkage, with timely and definite action response, avoiding the delay or failure risk that may occur in the electronic control system. The cooperation between the traction belt and the guide member, as well as the sliding rotation cooperation between the pull rod and the rotating support, ensures the smoothness of force transmission and the stability of the headgear movement. In addition, by setting a limit block to abut against the guide seat, a mechanical hard limit is provided for the descent stroke of the headgear, preventing over-travel and ensuring safety and reliability. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the massage chair in its upright position according to this utility model; Figure 2 This is a structural schematic diagram of the massage chair in its reclining state according to this utility model; Figure 3 This is a schematic diagram of the backrest frame in this utility model; Figure 4 This is a schematic diagram of the head cover structure in this utility model; Figure 5 This is a schematic diagram of the structure of the tie rod and the rotating support in this utility model.

[0017] Reference numerals: 1. Seat frame; 2. Backrest frame; 3. Armrest; 4. Traction belt; 5. Guide component; 6. Pull rod; 7. Rotating support; 8. Head cover; 9. Pull strap; 10. Tension spring; 11. Guide seat; 12. Limiting block; 13. Support base; 14. Rotating sleeve; 15. Sliding hole; 16. Mounting rod; 17. Pulley; 18. Arc-shaped slide rail; 19. Electric push rod; 20. Support rod. Detailed Implementation

[0018] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0019] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0020] like Figures 1 to 5The illustrated headrest linkage mechanism for a massage chair includes a seat frame 1, a backrest frame 2, armrests 3, and a drive mechanism. The drive mechanism is located between the seat frame 1 and the backrest frame 2, and is used to drive the backrest frame 2 to switch between an upright state and a reclining state relative to the seat frame 1. The armrests 3 are fixed to both sides of the backrest frame 2. The headrest linkage mechanism also includes: a traction strap 4, the first end of which is fixed to a support point on the seat frame 1; several guide members 5, spaced apart along the back curve of the backrest frame 2, through which the traction strap 4 passes sequentially; a pull rod 6, connected to the end of the traction strap 4; a rotating support 7, located on the backrest frame 2 at a position corresponding to the user's head, through which the pull rod 6 is slidably and rotatably inserted; and a headrest 8, the middle part (left, right, or center position) of which is hinged to a support rod 20 fixed to the armrest 3, and its rear end is hinged to the end of the pull rod 6. In this embodiment, the driving mechanism is an electric actuator 19; the rear end of the cylinder of the electric actuator 19 is hinged to the seat frame 1, and its front end is hinged to the backrest frame 2. It should be noted that this invention does not limit the specific type of driving mechanism. Any linear actuator capable of providing linear reciprocating motion to drive the backrest frame 2 to recline or stand upright relative to the seat frame can be used as the driving mechanism of this invention. This includes, but is not limited to, the electric actuator 19, hydraulic cylinders, pneumatic cylinders, or equivalent linear drive mechanisms.

[0021] By setting up a mechanical linkage mechanism consisting of a traction belt 4, a guide member 5, a pull rod 6, and a rotating support 7, the automatic and synchronous linkage of the head cover 8 and the backrest frame 2 is achieved. When the drive mechanism drives the backrest frame 2 to recline, the backrest frame 2 reclines relative to the seat frame 1, the traction belt 4 is pulled out, the rotating support 7 moves to the lower part of the pull rod 6, and the head cover 8 automatically descends under the action of gravity, providing the user with a private space and head protection. Conversely, when the backrest frame 2 stands up, the head cover 8 automatically rises under the action of the traction belt 4. The entire transmission mechanism is based on pure mechanical linkage, with timely and certain action response, avoiding the delay or failure risk that may occur in the electronic control system. The cooperation between the traction belt 4 and the guide member 5, and the sliding rotation cooperation between the pull rod 6 and the rotating support 7, ensure the smoothness of force transmission and the stability of the head cover 8's movement. In addition, by setting a limit block 12 to abut against the guide seat 11, a mechanical hard limit is provided for the descent stroke of the head cover 8, preventing over-travel and ensuring safety and reliability.

[0022] The traction belt 4 includes at least two sections of traction belt 9, and the two adjacent sections of traction belt 9 are connected by a tension spring 10. The design of installing tension spring 10 in the two traction belts 9 allows the mechanism to be buffered by the deformation of the spring when it moves to the limit position or encounters unexpected resistance, effectively absorbing impact energy, avoiding damage to the mechanism components caused by rigid collisions, and extending the service life.

[0023] The guide component 5 is a guide rail steel frame, on which a guide seat 11 is provided; the guide seat 11 has a guide hole or guide groove for the pull strap 9 to pass through.

[0024] At least one section of the pull strap 9 is fixedly provided with a limiting block 12. The limiting block 12 is located between two adjacent guide seats 11 and can move with the pull strap 9 to abut against the corresponding guide seat 11. In this embodiment, there are two limiting blocks 12, respectively disposed on both sides of one section of the pull strap 9, for abutting against the two adjacent guide seats 11 respectively. When the backrest frame 2 moves from the upright state to the reclining state, the pull strap 9 is continuously pulled out. At the end of the movement stroke, the limiting block 12 located on the left side of the pull strap 9 abuts against the guide seat 11 on the left side, thereby reliably limiting the final position of the backrest frame 2 in the reclining direction. Conversely, when the backrest frame 2 moves from the reclining state to the upright state, the pull strap 9 retracts. At the end of the movement stroke, the limiting block 12 located on the right side of the pull strap 9 abuts against the guide seat 11 on the right side, ensuring that the headrest 8 can accurately return to the initial state.

[0025] A U-shaped support frame is fixed to the seat frame 1. The first end of the traction belt 4 is fixed to the upper surface of the U-shaped support frame (by means of bolt connection, riveting, pin connection, or adhesive bonding). In this embodiment, the upper surface of the U-shaped support frame constitutes an effective support area. The aforementioned "support point" is a specific fixed position on this upper surface. This "support point" can be the middle of the upper surface or any suitable position offset to one side. Its core purpose is to provide a stable fixed origin for the traction belt 4 relative to the seat frame 1, so as to ensure the accuracy of the motion reference of the linkage mechanism.

[0026] The rotating support 7 includes a support base 13 fixed to the head area of ​​the backrest frame 2 and a rotating sleeve 14 rotatably housed within the support base 13. A sliding hole 15 is formed inside the rotating sleeve 14, through which the pull rod 6 slidably passes. The cross-section of the sliding hole 15 of the rotating sleeve 14 and the cross-section of the pull rod 6 are both matching rectangles. The matching rectangular cross-sections of the pull rod 6 and the rotating sleeve 14 ensure that the pull rod 6 does not rotate relative to the headrest during extension and retraction, thereby precisely controlling the flip angle and movement trajectory of the headgear 8.

[0027] The backrest frame 2 is fixed with mounting rods 16 on both sides, and each end of the mounting rod 16 is equipped with a pulley 17; the seat frame 1 is provided with arc-shaped slide rails 18 on both sides, and the pulleys 17 can be rolled into the arc-shaped slide rails 18 and move along their trajectory.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the utility model as defined by the appended claims and their equivalents.

Claims

1. A headrest linkage mechanism for a massage chair, comprising a seat frame (1), a backrest frame (2), armrests (3), and a drive mechanism, wherein the drive mechanism is disposed between the seat frame (1) and the backrest frame (2) for driving the backrest frame (2) to switch between an upright state and a reclining state relative to the seat frame (1), and the armrests (3) are fixed to both sides of the backrest frame (2); characterized in that, It also includes a head cover linkage mechanism, which includes: a traction strap (4), the first end of which is fixed to a support point set on the seat frame (1); a plurality of guide members (5), which are spaced apart along the back curve of the backrest frame (2), and the traction strap (4) passes through the plurality of guide members (5) in sequence; a pull rod (6), which is connected to the end of the traction strap (4); a rotating support (7), which is set at the position of the backrest frame (2) corresponding to the user's head, and the pull rod (6) is slidably and rotatably passed through the rotating support (7); and a head cover (8), the middle part of which is hinged to a support rod (20) fixed to the armrest (3), and the rear end of which is hinged to the end of the pull rod (6).

2. The headrest linkage mechanism for a massage chair according to claim 1, characterized in that: The traction belt (4) includes at least two sections of traction belt (9), and adjacent sections of traction belt (9) are connected by a tension spring (10).

3. The headrest linkage mechanism for a massage chair according to claim 2, characterized in that: The guide member (5) is a guide rail steel frame, on which a guide seat (11) is provided; the guide seat (11) has a guide hole or guide groove for the pull belt (9) to pass through.

4. The headrest linkage mechanism for a massage chair according to claim 3, characterized in that: At least one section of the pull belt (9) is fixedly provided with a limiting block (12), the limiting block (12) is located between two adjacent guide seats (11), and can move with the pull belt (9) to abut against the corresponding guide seat (11).

5. The headrest linkage mechanism for a massage chair according to claim 4, characterized in that: There are two limiting blocks (12), which are respectively set on both sides of one of the pull straps (9) and are used to abut against the two adjacent guide seats (11).

6. The headrest linkage mechanism for a massage chair according to claim 1, characterized in that: A U-shaped support frame is fixed on the seat frame (1), and the first end of the traction belt (4) is fixed to the upper surface of the U-shaped support frame.

7. The headrest linkage mechanism for a massage chair according to claim 1, characterized in that: The rotating support (7) includes a support base (13) fixed to the head area of ​​the backrest frame (2) and a rotating sleeve (14) rotatably housed in the support base (13); a sliding hole (15) is formed inside the rotating sleeve (14), and the pull rod (6) is slidably inserted into the sliding hole (15).

8. The headrest linkage mechanism for a massage chair according to claim 7, characterized in that: The cross-section of the sliding hole (15) of the rotating sleeve (14) and the cross-section of the pull rod (6) are both rectangular and match each other.

9. The headrest linkage mechanism for a massage chair according to claim 1, characterized in that: The driving mechanism is an electric push rod (19); the rear end of the cylinder of the electric push rod (19) is hinged to the seat frame (1), and its front end is hinged to the backrest frame (2).

10. The headrest linkage mechanism for a massage chair according to claim 1, characterized in that: The backrest frame (2) is fixed with mounting rods (16) on both sides, and pulleys (17) are installed at both ends of the mounting rods (16); the seat frame (1) is provided with arc-shaped slide rails (18) on both sides, and the pulleys (17) can be rolled into the arc-shaped slide rails (18) and move along its trajectory.

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