Double parallel electric push rod structure used on a massage chair

By adopting a dual parallel electric push rod structure on the massage chair, the electric push rods for the lower legs and the electric push rods for the backrest are driven in a coordinated manner, which solves the problem of non-coordinated drive in the existing technology and improves the support and user comfort of the massage chair.

CN224505828UActive Publication Date: 2026-07-17ZHEJIANG HAOZHONGHAO HEALTH PROD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG HAOZHONGHAO HEALTH PROD
Filing Date
2025-08-14
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The existing massage chairs lack linkage between the electric push rods for the backrest and the electric push rods for the calves, resulting in poor support and uneven force distribution when the backrest frame is rotated and adjusted, leading to insufficient user comfort.

Method used

It adopts a dual parallel electric push rod structure, which drives the lower leg electric push rod and the backrest electric push rod through linkage. At least two backrest electric push rods are set, and synchronous drive is achieved through a linkage unit, including transmission gears and reduction mechanism, to ensure that the backrest frame has good support and uniform force distribution when rotating and adjusting.

Benefits of technology

It achieves good support and uniform force distribution during the rotation and adjustment of the backrest frame, thus improving user comfort.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a double parallel electric push rod structure used on massage chair, including chair frame, hinged to the backrest frame of chair frame, hinged to the calf frame of backrest frame, drive backrest frame rotation's backrest electric push rod and drive calf frame rotation's calf electric push rod, backrest electric push rod is provided with two at least in parallel, is provided with linkage drive assembly on backrest frame, and linkage drive assembly includes drive motor and linkage unit that drives backrest electric push rod and calf electric push rod linkage action, and calf electric push rod and every backrest electric push rod are all configured as telescopic link assembly. The utility model discloses through linkage drive of calf electric push rod and backrest electric push rod, and at least setting two backrest electric push rods, make backrest frame when rotating adjustment relative chair frame have good supportability, and the stress is more uniform when adjusting, and calf frame can linkage action, make the comfort of user use more.
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Claims

1. A dual parallel electric push rod structure used on a massage chair, comprising a chair frame (100), a backrest frame (200) hinged to the chair frame (100), a leg support (300) hinged to the backrest frame (200), a backrest electric push rod (400) for driving the backrest frame (200) to rotate, and a leg electric push rod (500) for driving the leg support (300) to rotate, characterized in that, At least two electric backrest push rods (400) are arranged in parallel. A linkage drive assembly (600) is provided on the backrest frame (200). The linkage drive assembly (600) includes a drive motor (1) and a linkage unit (2) that drives the electric backrest push rod (400) and the electric leg push rod (500) to move in a linkage manner. The electric leg push rod (500) and each electric backrest push rod (400) are configured as a telescopic rod assembly (3). The telescopic rod assembly (3) includes a rod body (31), a telescopic rod (32) located in the rod body (31) and rotating to extend or retract relative to the rod body (31), and a rotation drive unit (33) that drives the telescopic rod (32) to rotate. The linkage unit (2) drives the rotation drive unit (33) to move.

2. The double parallel electric push rod structure used on a massage chair according to claim 1, characterized in that, The linkage unit (2) includes a transmission gear (21) connected to the output shaft of the drive motor (1) and a reduction mechanism (22) linked to the transmission gear (21). The transmission gear (21) is provided with a backrest drive shaft (23) that drives the rotation drive unit (33) of each backrest electric push rod (400) to move. The rotation drive unit (33) of the calf electric push rod (500) is driven by the calf drive shaft (24). The reduction mechanism (22) is located between the backrest drive shaft (23) and the calf drive shaft (24). The reduction mechanism (22) drives the calf drive shaft (24) to move.

3. The double parallel electric push rod structure used on a massage chair according to claim 2, characterized in that, The telescopic rod (32) is configured as a lead screw, and the rod body (31) is provided with an internal thread that mates with the lead screw. The rotary drive unit (33) includes a rotary drive seat (34) and a bevel gear structure (35) provided in the rotary drive seat (34). The bevel gear structure (35) is provided between the telescopic rod (32) and the backrest drive shaft (23) and between the telescopic rod (32) and the calf drive shaft (24).

4. The double parallel electric push rod structure used on a massage chair according to claim 2 or 3, characterized in that, The reduction mechanism (22) includes a drive reduction gear (25) disposed on the backrest drive shaft (23), a driven reduction gear (26) disposed on the calf drive shaft (24), and at least one intermediate reduction gear (27) located between the drive reduction gear (25) and the driven reduction gear (26).

5. The dual parallel electric push rod structure for use on a massage chair according to claim 4, wherein, The gear ratio of the active reduction gear (25) and the driven reduction gear (26) is 1:2, and the length ratio of the backrest electric push rod (400) and the lower leg electric push rod (500) is 2:

1.

6. The dual parallel electric push rod structure used on a massage chair according to claim 1, wherein, The backrest frame (200) is provided with a housing (4) for accommodating the drive motor (1), the lower leg electric push rod (500) is hinged between the housing (4) and the lower leg frame (300), and the backrest electric push rod (400) is hinged between the chair frame (100) and the backrest frame (200).