Adaptive ergonomic foot massaging device

Abstract

The application provides a self-adaptive ergonomic foot massage device, and relates to the technical field of automobile seat accessories. The device comprises a chassis, a driving device, a first massage mechanism and a second massage mechanism. The first massage mechanism and the second massage mechanism are hinged to the chassis through a rotating shaft, so that the massage mechanisms can rotate around the rotating shaft on the upper surface of the chassis to adapt to the change of the angle between the user's two feet. At least one end of the first massage mechanism and the second massage mechanism away from the rotating shaft is supported by a universal ball, which is in rolling contact with the upper surface of the chassis, so that the first massage mechanism and the second massage mechanism can smoothly slide on the chassis during self-adaptive adjustment. The driving device is connected with a reversing piece, and the center line L1 of the reversing piece and the axis L2 of the driving shaft of the driving device have an included angle β. The technical problem that the massage mechanism in the prior art cannot be self-adaptively adjusted according to the natural angle between the user's two feet, resulting in reduced ride comfort, is solved.

Description

Technical Field

[0001] This invention relates to the field of automotive seat accessories, and more specifically, to an adaptive ergonomic foot massage device. Background Technology

[0002] In existing car seats, foot massage functions are mostly achieved through massage mechanisms; however, existing technology has the following structural defects: (1) The transmission structure is complex and rigidly connected: Existing massage devices usually use gear sets or belt drives, and the relative positions between each massage component are fixed. It is impossible to adjust the angle according to the actual position of the user's feet during use, which leads to the misalignment of the massage points with the acupoints on the soles of the feet and poor massage effect.

[0003] (2) Lack of flexible adaptive structure: When the user's feet are placed in a natural posture (non-parallel state), the existing device cannot adapt to the different angles of the feet at the same time, resulting in uneven pressure on the soles of the feet and even discomfort.

[0004] Therefore, there is an urgent need for a vehicle-mounted foot massager with a flexible transmission and angle adaptive adjustment structure to solve the technical problems of rigid transmission and inability to adapt to the natural posture of the feet in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide an adaptive ergonomic foot massage device to alleviate the technical problem that the massage mechanism layout of existing in-vehicle foot massage devices does not conform to the biomechanical characteristics of the human lower limbs and cannot adaptively adjust according to the natural angle between the user's feet, resulting in reduced riding comfort.

[0006] This invention provides an adaptive ergonomic foot massage device, comprising a base frame, a drive unit, and a first massage mechanism and a second massage mechanism arranged on both sides of the base frame. Both the first and second massage mechanisms are hinged to the base frame via a rotating shaft, allowing the massage mechanisms to rotate around the rotating shaft within the upper surface of the base frame to adapt to changes in the angle between the user's feet. At least one end of each of the first and second massage mechanisms away from the rotating shaft is supported by a universal ball, which rolls in contact with the upper surface of the base frame, allowing the first and second massage mechanisms to slide smoothly on the base frame during adaptive adjustment. The drive unit is connected to a reversing element, and the centerline L1 of the reversing element forms an angle β with the axis L2 of the drive shaft of the drive unit.

[0007] In some embodiments, the rotating shaft is located at one end of the first and second massage mechanisms near the center line of the base frame; the driving device is connected to the first and second massage mechanisms and is used to continuously transmit torque during the rotation of the first and second massage mechanisms; the driving device is connected to the base frame through a sliding pair, and when the first and second massage mechanisms rotate, the driving device can slide along the base frame to compensate for displacement changes.

[0008] In some embodiments, the drive device is connected to the first massage mechanism and the second massage mechanism via a commutator, the input end of the commutator is slidably engaged with the output end of the drive device, and the output end of the commutator is connected to the first massage mechanism and the second massage mechanism.

[0009] In some embodiments, both the first massage mechanism and the second massage mechanism include a frame, a first roller, a second roller, and a scraping board; the first roller is connected to a first rotating shaft, and the first rotating shaft is hinged to the frame via a bearing; the first roller and the second roller are connected via a second rotating shaft, and the second rotating shaft is eccentrically positioned relative to the first rotating shaft, so that the second roller can rotate synchronously with the first roller; one end of the scraping board is hinged to the second rotating shaft, and the other end of the scraping board is slidably engaged with a second sliding groove on the frame via a sliding shaft, so that the scraping board performs an undulating scraping action when the roller rotates.

[0010] In some embodiments, the first roller and the second roller are provided with protrusions, and the scraping board is provided with protrusions.

[0011] In some embodiments, the drive device is located in the middle of the base frame, and the first massage mechanism and the second massage mechanism are arranged on both sides of the drive device. The universal joint transmits the torque of the drive device to the first massage mechanism and the second massage mechanism on both sides. The drive device includes a guide part, and the left and right sides of the guide part are provided with first slide grooves. The first slide grooves slide in cooperation with the slide rails on the base frame, so that the drive device can slide in the back-and-forth direction on the base frame.

[0012] In some embodiments, the adaptive ergonomic foot massager further includes a connector for connecting to the seat back body, the connector having a shaft hole about which the foot massager can rotate to be stored in a storage recess in the seat back body when not in use.

[0013] In some embodiments, when the first rotating shaft rotates around the second rotating shaft, it causes the end of the scraping board that is hinged to the first rotating shaft to move up and down. The scraping board moves along the slide groove under the constraint of the slide groove, thereby realizing the massage action of simulating traditional Chinese medicine scraping.

[0014] In some embodiments, the adaptive ergonomic foot massager also includes a connecting bracket, the base being rotatably connected to the back of a car seat via the connecting bracket, so that the device has a folded state that is stored in a storage groove on the back of the seat back and an unfolded state that is tilted downwards.

[0015] In some embodiments, the centerlines of the first and second massage mechanisms are arranged symmetrically at an included angle α.

[0016] The beneficial effects of this invention are: The adaptive ergonomic foot massage device of the present invention, by hinged to a base frame via a rotating shaft, allows the massage mechanisms to rotate around the rotating shaft within the upper surface of the base frame. This enables the device to adaptively adjust the angle between the two mechanisms according to the natural placement of the user's feet, significantly improving the adaptability and comfort of the foot massage device for users of different body types and avoiding joint discomfort caused by the forced parallel placement of feet in traditional fixed-angle massage devices. Furthermore, by providing universal balls at at least one end of the first and second massage mechanisms away from the rotating shaft, and ensuring that the universal balls roll in contact with the upper surface of the base frame, the sliding friction between the massage mechanisms and the base frame is transformed into rolling friction, effectively reducing the friction caused by the massage mechanisms in the adaptive ergonomic foot massage device. The frictional resistance during rotation makes the massage mechanism rotate more smoothly and flexibly. At the same time, the universal ball provides effective support to the end of the massage mechanism away from the rotation axis, preventing the massage mechanism from tipping over or warping when bearing the weight of the user's feet, thus ensuring the structural stability and positional accuracy of the massage mechanism. The drive device is connected to the reversing component, and the center line of the reversing component has an angle β with the drive shaft axis of the drive device. This allows the drive device to continuously transmit torque to the massage mechanism through the reversing component as the massage mechanism rotates around the rotation axis and changes the angle. This effectively solves the problems of transmission jamming, stress concentration, or interruption that easily occur in rigid transmission mechanisms when the angle changes, ensuring the continuity and stability of the massage action during the angle adaptive adjustment process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the adaptive ergonomic foot massage device of the present invention in use. Figure 2 This is a schematic diagram of the base frame in the adaptive ergonomic foot massage device of the present invention; Figure 3 This is a schematic diagram of the structure of the adaptive ergonomic foot massage device of the present invention in an exploded state; Figure 4 This is a structural schematic diagram of the adaptive ergonomic foot massage device of the present invention viewed from the front when not in use; Figure 5 This is a structural schematic diagram of the adaptive ergonomic foot massage device of the present invention viewed from the front during use. Figure 6 This is a schematic diagram of the connection between the adaptive ergonomic foot massage device of the present invention and the seat back body in the use state. Figure 7 This is a schematic diagram of the connection between the adaptive ergonomic foot massage device of the present invention and the seat back body when not in use; Figure 8 This is a schematic diagram of the transmission section of the adaptive ergonomic foot massage device of the present invention in use, viewed from the side. Figure 9 This is a schematic diagram of the transmission section of the adaptive ergonomic foot massage device of the present invention in a non-use state, viewed from the side. Figure 10 This is a schematic diagram of the cross-sectional structure of the power transmission part of the adaptive ergonomic foot massage device of the present invention in use. Figure 11 for Figure 10 A magnified view of a section at point A in the middle; Figure 12 This is a schematic diagram of the cross-sectional structure of the sliding connection of the adaptive ergonomic foot massage device of the present invention in use. Figure 13 for Figure 12 A magnified view of a section at point B in the middle; Figure 14 This is a schematic diagram of the drive device in the adaptive ergonomic foot massage device of the present invention. Figure 15 This is a structural schematic diagram of the transmission section of the adaptive ergonomic foot massage device of the present invention, viewed from the front angle during use. Figure 16 This is a structural schematic diagram of the first and second massage mechanisms of the adaptive ergonomic foot massage device of the present invention, viewed from the front. Figure 17This is a side view of the transmission parts of the first and second massage mechanisms of the adaptive ergonomic foot massage device of the present invention. Figure 18 This is a side view diagram of the first and second massage mechanisms of the adaptive ergonomic foot massage device of the present invention. Figure 19 This is a schematic diagram of the structure of the shelf of the adaptive ergonomic foot massage device of the present invention; Figure 20 This is a structural schematic diagram of the rear view angle of the car seat in the massage state according to the present invention; Figure 21 This is a structural schematic diagram of the car seat of the present invention viewed from the side in a non-massage state; Figure 22 This is a schematic diagram of the car seat of the present invention viewed from the side in the massage state; Figure 23 This is a schematic diagram of the structure of the car seat of the present invention in the state of the foot massage device being stored; Figure 24 This is a schematic diagram of the structure of the car seat of the present invention in the unfolded state of the foot massage device.

[0019] icon: 100 - Seat backrest body; 110 - Storage recess; 200 - Adaptive ergonomic foot massager; 210 - Locking / unlocking device; 300-Base frame; 310-Base plate; 320-Shelf; 321-Rotating hole; 322-Slide rail; 330-Limiting device; 340-Top cover; 350-Connector; 360-Shaft hole; 400 - First massage mechanism; 410 - Gua Sha board; 411 - Protrusion; 420 - Roller assembly; 420a - First roller; 420b - Second roller; 421 - Second pivot; 422 - First pivot; 430 - Second slide rail; 440 - Slide shaft; 450 - Frame; 460 - Rotating shaft; 470 - Universal ball joint; 500 - Second Massage Center; 700-Bearing; 800 - Drive unit; 810 - Guide component; 811 - First slide rail; 900-Universal Joint. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] In the description of this invention, it should be noted that the terms "inner," "outer," "upper," "lower," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only used for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] like Figures 1 to 24 As shown, the present invention provides an adaptive ergonomic foot massage device 200. The adaptive ergonomic foot massage device 200 includes a base frame 300, a drive device 800, and a first massage mechanism 400 and a second massage mechanism 500 arranged on both sides of the base frame 300. The first massage mechanism 400 and the second massage mechanism 500 are symmetrically arranged. Both the first massage mechanism 400 and the second massage mechanism 500 are hinged to the base frame 300 through a rotation axis 460, so that the massage mechanism can rotate around the rotation axis 460 on the base frame 300. The upper surface rotates inward to adapt to changes in the angle between the user's feet; at least one end of the first massage mechanism 400 and the second massage mechanism 500 away from the rotation axis 460 is supported by a universal ball 470, which rolls in contact with the upper surface of the base frame 300, allowing the first massage mechanism 400 and the second massage mechanism 500 to slide smoothly on the base frame 300 during adaptive adjustment; the drive device 800 is connected to the reversing member, and the center line L1 of the reversing member has an angle β with the axis L2 of the drive shaft of the drive device 800.

[0024] The adaptive ergonomic foot massage device 200 of the present invention, by hinged to the first massage mechanism 400 and the second massage mechanism 500 via a rotating shaft 460, allows the massage mechanisms to rotate around the rotating shaft 460 within the upper surface of the base 300. This enables the device to adaptively adjust the angle between the two mechanisms according to the natural placement of the user's feet, significantly improving the adaptability and comfort of the foot massage device for users of different body types, and avoiding the joint discomfort caused by the forced parallel placement of feet in traditional fixed-angle massage devices. Furthermore, by providing universal balls 470 at at least one end of the first massage mechanism 400 and the second massage mechanism 500 away from the rotating shaft 460, and allowing the universal balls 470 to roll in contact with the upper surface of the base 300, the sliding friction between the massage mechanisms and the base 300 is transformed into rolling friction. This effectively reduces the frictional resistance of the massage mechanism during adaptive rotation, making the rotation smoother and more flexible. Simultaneously, the universal ball 470 provides effective support to the end of the massage mechanism furthest from the rotation axis 460, preventing overturning or warping when bearing the weight of the user's feet, thus ensuring the structural stability and positional accuracy of the massage mechanism. The drive unit 800 is connected to the reversing component, and the centerline of the reversing component forms an angle β with the drive shaft axis of the drive unit 800. This allows the drive unit 800 to continuously transmit torque to the massage mechanism through the reversing component as the massage mechanism rotates around the rotation axis 460 to change the angle. This effectively solves the problems of transmission jamming, stress concentration, or interruption that easily occur in rigid transmission mechanisms when the angle changes, ensuring the continuity and stability of the massage action during the angle adaptive adjustment process.

[0025] like Figure 1 As shown, the centerline L1 of the reversing component forms an angle β with the drive shaft axis L2 of the drive device 800. The angle β changes accordingly with the rotation of the first massage mechanism 400 and / or the second massage mechanism 500 around the rotation axis 460. To accommodate differences in the natural outward rotation angle of different users' feet, the angle β can vary within the range of 0° to 90°, preferably between 10° and 75°. Specifically, when the user's feet are placed on the massage mechanism in a naturally relaxed posture, the first massage mechanism 400 and the second massage mechanism 500 rotate outward around their respective rotation axes 460 to a suitable position. At this time, the centerline L1 of the reversing component deflects relative to the drive shaft axis L2, and the angle β can be 15°, 30°, or 45°. Within this range, the reversing component, through its own angle compensation characteristics, smoothly transmits the torque output by the drive device 800 to the massage mechanism, resulting in minimal transmission efficiency loss and avoiding stress concentration caused by rigid connections.

[0026] When a user is large or has a habitual sitting posture that causes an increased outward rotation angle of their legs, the massage mechanism further rotates outward around the rotation axis 460, with the included angle β increasing accordingly to 60° or even 75°. Under this large-angle offset, because there is still an effective transmission engagement or connection between the center line L1 of the reversing component and the drive shaft axis L2, and because the end of the massage mechanism furthest from the rotation axis 460 is supported by the universal ball 470 rolling on the upper surface of the base frame 300, the drive device 800 can still continuously transmit power to the massage mechanisms on both sides, ensuring that the massage action is uninterrupted.

[0027] By setting the variable range of the included angle β to 0°~90°, and cooperating with the rolling support of the universal ball 470 and the sliding compensation of the drive device 800 along the base frame 300, the foot massage device maintains stable and reliable power transmission during the adaptive rotation of the massage mechanism, which significantly improves the device's adaptability to different user body shapes and sitting habits.

[0028] In some embodiments, a rotating shaft 460 is disposed at one end of the first massage mechanism 400 and the second massage mechanism 500 near the center line of the base frame 300; a drive device 800 is connected to the first massage mechanism 400 and the second massage mechanism 500 and is used to continuously transmit torque during the rotation of the first massage mechanism 400 and the second massage mechanism 500; the drive device 800 is connected to the base frame 300 through a sliding pair, and when the first massage mechanism 400 and the second massage mechanism 500 rotate, the drive device 800 can slide along the base frame 300 to compensate for displacement changes. By setting the rotating shaft 460 at one end of the massage mechanism near the center line of the base frame 300, a stable hinge fulcrum is formed on the inner side of the massage mechanism, and the outer side is supported by the universal ball 470 rolling on the upper surface of the base frame 300. This constitutes a multi-point support structure with inner hinge and outer rolling, effectively dispersing the load applied by the user's feet and preventing the massage mechanism from overturning or warping during rotation and load-bearing, ensuring the smoothness of angle adaptive adjustment and structural stability. The drive device 800 continuously transmits torque during the rotation of the massage mechanism, and the sliding pair allows the drive device 800 to slide along the base frame 300 to compensate for displacement changes. When the massage mechanism rotates around the rotating shaft 460 and changes the included angle, the relative position change between the drive device 800 and the massage mechanism is compensated in real time, effectively avoiding the problems of transmission mechanism twisting, stretching or off-center loading caused by positional deviation. This ensures that the power transmission path is always in a reasonable centered state, thus maintaining the continuity of massage action and the reliability of the transmission system while ensuring the adaptive adjustment of the massage mechanism angle.

[0029] In some embodiments, the drive device 800 is connected to the first massage mechanism 400 and the second massage mechanism 500 via a commutator. The input end of the commutator is slidably engaged with the output end of the drive device 800, and the output end of the commutator is connected and engaged with the first massage mechanism 400 and the second massage mechanism 500. A commutator is used to connect the drive unit 800 to the massage mechanism. The sliding engagement between the input end of the commutator and the output end of the drive unit 800 allows the input end of the commutator to slide axially relative to the output end of the drive unit 800 during the sliding compensation displacement process along the base frame 300. This effectively absorbs the displacement difference caused by the relative position change between the drive unit 800 and the massage mechanism, avoiding rigid constraints and stress concentration in the transmission link. Simultaneously, the connection between the output end of the commutator and the massage mechanism smoothly transmits the torque output by the drive unit 800 to the first massage mechanism 400 and the second massage mechanism 500. This ensures that power transmission remains continuous and reliable throughout the entire process of the massage mechanism rotating around the rotation axis 460 to change the included angle, significantly improving the transmission stability and structural durability of the foot massage device under angle adaptive adjustment conditions.

[0030] In some embodiments, both the first massage mechanism 400 and the second massage mechanism 500 include a frame 450, a first roller 420a, a second roller 420b, and a scraping board 410. The first roller 420a and the second roller 420b are symmetrically arranged and connected to a first rotating shaft 422, which is rotatably mounted on the frame 450 via a bearing 700. The first roller 420a and the second roller 420b are connected by a second rotating shaft 421, which is eccentrically arranged with the first rotating shaft 422, so that the second roller 420b can rotate synchronously with the first roller 420a. One end of the scraping board 410 is hinged to the second rotating shaft 421, and the other end of the scraping board 410 is slidably engaged with a second sliding groove 430 on the frame 450 via a sliding shaft 440, so that the scraping board 410 performs an undulating scraping action when the rollers rotate. The first roller 420a is rotatably supported on the frame 450 by the cooperation of the first rotating shaft 422 and the bearing 700, which effectively reduces the frictional resistance when the roller assembly 420 rotates, ensuring the smooth execution of the rolling massage action; the first roller 420a and the second roller 420b are connected by the second rotating shaft 421, and the eccentric setting of the second rotating shaft 421 relative to the first rotating shaft 422 makes the second roller 420b rotate synchronously with the first roller 420a, while the second rotating shaft 421 makes an eccentric circular motion around the first rotating shaft 422; by hinged one end of the scraping board 410 to the eccentric second rotating shaft 421, and the other end is connected to the sliding shaft 440 The second slide groove 430 on the frame 450 slides and engages with the second rotating shaft 421, causing the eccentric circular motion of the second rotating shaft 421 to drive the hinge end of the scraping board 410 to produce a regular up-and-down undulating displacement. The second slide groove 430 constrains and guides the movement trajectory of the other end of the scraping board 410, thereby converting the continuous rotational motion of the roller assembly 420 into the reciprocating undulating motion of the scraping board 410 along the second slide groove 430, realizing the massage action of simulating traditional Chinese medicine scraping. Thus, the first roller 420a and the second roller 420b perform rolling pressure on the sole of the foot, and the scraping board 410 performs scraping stimulation on the sole of the foot. The two massage techniques work together to significantly improve the comprehensiveness and effectiveness of foot massage.

[0031] In some embodiments, the first roller 420a and the second roller 420b constitute a roller assembly 420, the roller assembly 420 is provided with a protrusion, and the scraping board 410 is provided with a protrusion 411. By setting convex bumps on the surfaces of the first roller 420a and the second roller 420b, the convex bumps can form intermittent point-like pressure stimulation on the acupoints of the sole during the rolling and pressing process of the rollers, effectively enhancing the penetration of the rolling massage into deep acupoints and improving the effect of relieving foot fatigue. By setting protrusions 411 on the scraping board 410, when the scraping board 410 performs undulating scraping movements along the second groove 430, the protrusions 411 can form a more concentrated scraping stimulation on the meridians and reflex zones of the sole, simulating the "point-surface" combined force application mode in traditional Chinese medicine scraping therapy, significantly improving the accuracy and effectiveness of scraping massage. The convex bumps and protrusions 411 alternately act on different areas of the sole during the massage, producing differentiated pressure peaks and rhythm changes, which can relax the surface muscles of the sole and deeply stimulate deep acupoints, bringing users a richer and more three-dimensional massage experience, thereby achieving better overall relaxation and health care effects.

[0032] In some embodiments, the drive device 800 is located in the middle of the base frame 300, and the first massage mechanism 400 and the second massage mechanism 500 are arranged on both sides of the drive device 800. The universal joint 900 transmits the torque of the drive device 800 to the first massage mechanism 400 and the second massage mechanism 500 on both sides. The drive device 800 includes a guide part 810, and the left and right sides of the guide part 810 are provided with a first slide groove 811. The first slide groove 811 slides in cooperation with the slide rail 322 on the base frame 300, so that the drive device 800 can slide in the back-and-forth direction of the base frame 300. By placing the drive unit 800 in the middle of the base frame 300 and positioning the first massage mechanism 400 and the second massage mechanism 500 on either side of the drive unit 800, the overall structure of the foot massage device is symmetrically arranged, with a balanced center of gravity and high space utilization. This effectively avoids the problems of center of gravity shift and uneven force distribution on the base frame 300 caused by unilateral arrangement, while shortening the transmission path from the drive unit 800 to the massage mechanisms on both sides, thus improving torque transmission efficiency. The torque of the drive unit 800 is transmitted to the massage mechanisms on both sides via the universal joint 900. As the massage mechanisms rotate around the rotation axis 460 and change their included angle, the universal joint 900 can utilize its angle compensation characteristics to adapt to the positional changes between the output end of the drive unit 800 and the input end of the massage mechanism, ensuring continuous power transmission. The guide component 810 provides precise linear guidance constraints for the drive device 800 by sliding the first slide grooves 811 on both sides of the guide component 810 with the slide rails 322 on the base frame 300. This ensures that the drive device 800 can only slide linearly back and forth along the front and rear directions of the base frame 300, effectively preventing lateral offset or skew during displacement compensation and ensuring the transmission alignment accuracy between the drive device 800 and the massage mechanisms on both sides. As a result, when the massage mechanism rotates around the rotation axis 460, the drive device 800 can slide along the slide rails 322 in a timely manner to compensate for longitudinal displacement changes, avoiding twisting, off-center loading, or meshing failure of the universal joint 900 due to position offset, and significantly improving the transmission stability and structural durability of the foot massage device under angle adaptive adjustment conditions.

[0033] In some embodiments, the adaptive ergonomic foot massager 200 further includes a connector 350 for connection to the seat back body 100. The connector 350 has a shaft hole 360, allowing the foot massager to rotate around the shaft hole 360 ​​and be stored in the storage groove 110 of the seat back body 100 when not in use. By using a connector 350 with a shaft hole 360 ​​to connect to the seat back body 100, the foot massager can rotate relative to the seat back body 100 around the shaft hole 360. When in use, it rotates downwards to unfold to the working position, and when not in use, it rotates upwards and is stored in the storage groove 110 of the seat back body 100. This effectively prevents the massager from occupying legroom in the vehicle when idle, maintaining the cleanliness of the interior and the overall appearance of the seat. It also prevents accidental impact or contamination of the massager when not in use, extending the device's lifespan. In some embodiments, the reversing element is one or more of the following: universal joint 900, spring shaft, rubber flexible shaft, bevel gear drive, or flexible hinge. By setting the reversing element as one or more of the following: universal joint 900, spring shaft, rubber flexible shaft, bevel gear drive, or flexible hinge, the transmission scheme between the drive device 800 and the massage mechanism can be flexibly selected and combined according to the internal spatial layout of the base frame 300, the transmission ratio requirements, and the angle compensation range. This significantly improves the layout flexibility and designability of the transmission system and ensures the continuity and reliability of power transmission under different installation postures and angular offset conditions.

[0034] In some embodiments, when the first rotating shaft 422 rotates around the second rotating shaft 421, it causes the end of the scraping board 410 that is hinged to the first rotating shaft 422 to move up and down. The scraping board 410 moves along the slide groove under the constraint of the slide groove, thereby realizing the massage action of simulating traditional Chinese medicine scraping. The eccentric rotation of the first rotating shaft 422 around the second rotating shaft 421 causes the end of the scraping board 410 hinged to the first rotating shaft 422 to produce a regular up-and-down undulating displacement. At the same time, the sliding groove on the frame 450 constrains and guides the movement trajectory of the other end of the scraping board 410, so that the scraping board 410 forms a specific reciprocating undulating movement path under the motion coupling of the two ends. This accurately transforms the continuous rotational motion of the roller assembly 420 into a scraping action that simulates the scraping technique of traditional Chinese medicine. Thus, when the scraping board 410 moves along a specific trajectory under the constraint of the sliding groove, it can perform continuous and uniform scraping stimulation on the meridians and acupoints of the sole of the foot. Combined with the rolling and pressing of the first roller 420a and the second roller 420b, it realizes the organic combination of rolling and scraping massage techniques, which significantly improves the comprehensiveness and health care effect of foot massage.

[0035] In some embodiments, the adaptive ergonomic foot massager 200 also includes a connecting bracket. The base 300 is rotatably connected to the back of the car seat back via the connecting bracket, allowing the device to be in a retracted state (folded up and tilted downwards) and an extended state (stored in a storage groove 110 on the back of the seat back). The connecting bracket rotatably connects the base 300 to the back of the car seat back, enabling the foot massager to rotate relative to the seat back in a vertical plane. When in use, it rotates downwards to the tilted extended state, allowing the user to naturally place their feet on the tilted massager for a foot massage, conforming to the leg extension angle in a relaxed posture and improving seating comfort. When not in use, it rotates upwards to the retracted state, embedding the entire device into the storage groove 110 on the back of the seat back, forming a flat surface with the seat back. This effectively prevents the massager from occupying legroom when idle, maintaining the cleanliness of the interior and the overall appearance of the seat. It also prevents accidental impacts or contamination of the massage mechanism when not in use, extending the device's lifespan.

[0036] In some embodiments, the center lines of the first massage mechanism 400 and the second massage mechanism 500 are arranged symmetrically at an included angle α, wherein 0°≤α≤40°. The center lines of the first massage mechanism 400 and the second massage mechanism 500 are symmetrically arranged at an angle α, so that the massage mechanisms on the left and right sides form a mirror-like balanced layout. This ensures that the massage movements on the user's feet are synchronized and coordinated, and the force is balanced, avoiding the difference in experience caused by excessive or insufficient massage on one side. By setting the range of the angle α from 0° to 40°, the foot massage device can cover a variety of user postures, from parallel feet to larger natural external rotation angles. When α is 0°, the massage mechanisms are arranged in parallel, which can accommodate users who habitually place their feet together. When α is 10° to 30°, it conforms to the natural biomechanical characteristics of the human lower limbs, which can effectively reduce the torsional torque of the hip, knee, and ankle joints and improve the stability of sitting posture. When α is close to 40°, it can still accommodate users with larger body sizes or sitting postures that result in larger external rotation angles of the feet. Thus, the angle range of 0° to 40° significantly broadens the adaptability of the foot massage device to users with different body types and different sitting postures, ensuring the effectiveness of the massage function while maximizing the satisfaction of the personalized comfort needs of various users. The angles between the center lines of the first massage mechanism 400 and the second massage mechanism 500 and the center line of the base frame 300 are α1 and α2, respectively, so that the left and right feet can be adjusted at different angles during use to meet the user's different needs.

[0037] In some embodiments, the base frame 300 includes a base plate 310 and a shelf plate 320. The shelf plate 320 is provided with a rotation hole 321 for mounting the rotating shaft and a slide rail 322 for sliding the power module. A top cover 340 is provided above the shelf plate 320. A limiting device 330 is provided between the base plate 310 and the top cover 340 to limit the rotation angle range of the massage module. The base plate 310 and the shelf plate 320 form a double-layer structure of the base frame 300. The base plate 310 provides overall support, and the shelf plate 320 integrates the rotation hole 321 and the slide rail 322, so that the massage assembly and the power module are arranged in layers, which is compact and easy to assemble and maintain. The top cover 340 covers the shelf plate 320, effectively isolating the internal transmission components from the user's feet, preventing foreign objects from entering, and improving the safety of use. The limiting device 330 further limits the rotation angle of the massage assembly to prevent excessive deflection from causing structural interference.

[0038] In some embodiments, the scraping massage pad is provided with protrusions 411, which enhance the stimulation effect on acupoints on the soles of the feet during scraping massage.

[0039] In some embodiments, the base frame 300 is hinged to the seat back body 100 via a mounting cantilever. The mounting cantilever has a shaft hole 360. The in-vehicle foot massager also includes a locking / unlocking device 210 for locking the foot massager in a retracted or extended state. The shaft hole 360 ​​on the mounting cantilever is hinged to the seat back body 100, allowing the massager to rotate around the shaft hole 360. The locking / unlocking device 210 enables quick switching and reliable locking between the extended and retracted states. When retracted, it is embedded in the storage groove 110, keeping the interior space tidy and the seat appearance intact.

[0040] It should be noted that, where there is no conflict, the features in the embodiments of this invention can be combined with each other.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An adaptive ergonomic foot massage device, comprising a base frame (300), a drive device (800), and a first massage mechanism (400) and a second massage mechanism (500) respectively arranged on both sides of the base frame (300), characterized in that, Both the first massage mechanism (400) and the second massage mechanism (500) are hinged to the base frame (300) via a rotating shaft (460), so that the massage mechanism can rotate around the rotating shaft (460) within the upper surface of the base frame (300) to adapt to changes in the angle between the user's two feet. The first massage mechanism (400) and the second massage mechanism (500) are supported at least one end away from the rotation axis (460) by a universal ball (470), which makes rolling contact with the upper surface of the base frame (300), so that the first massage mechanism (400) and the second massage mechanism (500) can slide smoothly on the base frame (300) during adaptive adjustment. The drive unit is connected to the commutator (900), and the center line L1 of the commutator has an angle β with the axis L2 of the drive shaft of the drive unit (800).

2. The adaptive ergonomic foot massage device according to claim 1, characterized in that, The rotating shaft (460) is located at one end of the first massage mechanism (400) and the second massage mechanism (500) near the center line of the base frame (300); The drive device (800) is connected to the first massage mechanism (400) and the second massage mechanism (500) and is used to continuously transmit torque during the rotation of the first massage mechanism (400) and the second massage mechanism (500); The drive device (800) is connected to the base frame (300) via a sliding pair. When the first massage mechanism (400) and the second massage mechanism (500) rotate, the drive device (800) can slide along the base frame (300) to compensate for displacement changes.

3. The adaptive ergonomic foot massage device according to claim 1, characterized in that, The drive device (800) is connected to the first massage mechanism (400) and the second massage mechanism (500) via a reversing member (900). The input end of the reversing member (900) is slidably engaged with the output end of the drive device (800), and the output end of the reversing member (900) is connected and engaged with the first massage mechanism (400) and the second massage mechanism (500).

4. The adaptive ergonomic foot massage device according to claim 3, characterized in that, Both the first massage mechanism (400) and the second massage mechanism (500) include a frame (450), a first roller (420a), a second roller (420b), and a scraping board (410); The first roller (420a) is connected to the first rotating shaft (422), and the first rotating shaft (422) is hinged to the frame (450) via a bearing (700); The first roller (420a) and the second roller (420b) are connected by a second rotating shaft (421). The second rotating shaft (421) is eccentrically set with respect to the first rotating shaft (422), so that the second roller (420b) can rotate synchronously with the first roller (420a). One end of the scraping board (410) is hinged to the second rotating shaft (421), and the other end of the scraping board (410) is slidably engaged with the second sliding groove (430) on the frame (450) through the sliding shaft (440), so that the scraping board (410) performs undulating scraping action when the roller (420) rotates.

5. The adaptive ergonomic foot massage device according to claim 4, characterized in that, The first roller (420a) and the second roller (420b) are provided with protrusions, and the scraping board (410) is provided with protrusions (411).

6. The adaptive ergonomic foot massage device according to claim 5, characterized in that, The drive unit (800) is located in the middle of the base frame (300), and the first massage mechanism (400) and the second massage mechanism (500) are arranged on both sides of the drive unit (800). The universal joint (900) transmits the torque of the drive unit (800) to the first massage mechanism (400) and the second massage mechanism (500) on both sides. The drive device (800) includes a guide part (810), and the guide part (810) has a first slide groove (811) on both the left and right sides. The first slide groove (811) slides in cooperation with the slide rail (322) on the base frame (300), so that the drive device (800) can slide on the base frame (300) in the front-back direction.

7. The adaptive ergonomic foot massage device according to claim 1, characterized in that, It also includes a connector (350) for connecting to the seat back body (100), the connector (350) having a shaft hole (360) and the foot massage device being able to rotate around the shaft hole (360) so as to be stored in the storage groove (110) of the seat back body (100) when not in use.

8. The adaptive ergonomic foot massage device according to claim 4, characterized in that, When the first rotating shaft (422) rotates around the second rotating shaft (421), it drives the end of the scraping board (410) that is hinged to the first rotating shaft (422) to move up and down. The scraping board (410) moves along the groove under the constraint of the groove, realizing the massage action of simulating traditional Chinese medicine scraping.

9. The adaptive ergonomic foot massage device according to any one of claims 1-8, characterized in that, It also includes a connecting bracket, the base frame (300) being rotatably connected to the back of the car seat back via the connecting bracket, so that the device has a folded state and a downward tilted unfolded state in the storage groove (110) on the back of the seat back.

10. The adaptive ergonomic foot massage device according to claim 1, characterized in that, The center lines of the first massage mechanism (400) and the second massage mechanism (500) are arranged symmetrically at an included angle α.

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