Shank lifting mechanism and massage chair

Abstract

The utility model discloses a shank lifting mechanism which comprises a first connecting rod, a second connecting rod, a supporting rod and a swing rod. The first connecting rod is hinged to the seat body correspondingly, the first connecting rod is hinged to the second connecting rod, and the supporting rod is hinged to the seat body correspondingly and hinged to the second connecting rod; the swing rod is hinged to the base and the first connecting rod. The hinged position of the first connecting rod corresponding to the seat body is located between the hinged position of the first connecting rod and the second connecting rod and the hinged position of the first connecting rod and the swing rod; one end of the second connecting rod away from the hinged part of the first connecting rod is used for supporting the shank mechanism; when the seat body moves and topples over relative to the base, the first connecting rod drives the second connecting rod to tilt upwards so as to support and jack up the shank mechanism. According to the scheme, the massage chair is simpler in structure, convenient to assemble, low in weight and convenient to transport and move.

Description

Technical Field

[0001] This utility model relates to a massage chair, specifically a leg lifting mechanism and a massage chair. Background Technology

[0002] With the popularization of healthy living concepts, massage chairs have gradually become important health care equipment in home and commercial settings. The structure of a massage chair typically includes a base, a seat body mounted on the base, and a leg mechanism hinged to the seat body. Existing massage chairs usually have a reclining function, allowing users to assume a near-flat, relaxed posture. This function is achieved by moving the seat body on the base, changing the angle of the seat body, and thus changing the posture. In this process, the lifting of the leg mechanism is crucial for improving comfort. However, traditional leg lifting structures often use independent drive components (such as electric actuators, pneumatic devices, or hydraulic systems) for motion control. This type of design has the following significant drawbacks:

[0003] 1. Cost and Structural Complexity: Independent drive components require additional power sources and transmission mechanisms, leading to increased overall structural complexity and significantly higher production costs. Furthermore, hydraulic or pneumatic systems pose a risk of leakage and require regular maintenance, further increasing operating costs.

[0004] 2. Weight and Space Occupancy: The addition of drive components and their accessories significantly increases the weight of the massage chair, affecting the ease of movement and installation. Furthermore, the complex mechanical layout may encroach on the user's legroom, reducing comfort.

[0005] Therefore, improvements to existing technologies are still needed. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a calf lifting mechanism and a massage chair, which can make the massage chair structure simpler, easier to assemble, and lighter, making it convenient to transport and move.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a calf lifting mechanism, comprising a first connecting rod, a second connecting rod, a support rod, and a swing rod; the first connecting rod is hinged to the seat body and is also hinged to the second connecting rod; the support rod is hinged to the seat body and is also hinged to the second connecting rod; the swing rod is hinged to the base and to the first connecting rod; the position where the first connecting rod is hinged to the seat body is between the hinge position of the first connecting rod and the second connecting rod and the hinge position of the first connecting rod and the swing rod; the end of the second connecting rod away from the hinge position of the first connecting rod is used to support the calf mechanism; when the seat body moves and tilts relative to the base, the first connecting rod drives the second connecting rod to tilt upward to support and lift the calf mechanism.

[0008] As a further improvement of this utility model, a roller assembly is fixedly connected to the second connecting rod, the roller assembly abuts against the lower leg mechanism, and the second connecting rod supports and lifts the lower leg mechanism through the roller assembly.

[0009] As a further improvement of this utility model, the roller assembly includes a connecting rod for fixed connection with the second connecting rod, and a roller rotatably connected to the connecting rod.

[0010] As a further improvement of this utility model, the support rod is arc-shaped, and the side corresponding to the lower leg mechanism is concave.

[0011] As a further improvement of this utility model, it also includes a fixing member for fixed connection with the seat body, wherein the first connecting rod and the support rod are hinged to the fixing member at the positions where the seat body is hinged.

[0012] A massage chair includes a base, a seat body movably mounted on the base, a leg mechanism hinged to the seat body, and a drive mechanism disposed between the base and the seat body, the drive mechanism being used to drive the seat body to move on the base; a leg lifting mechanism, employing any of the above-described improvements, is also provided between the base and the seat body.

[0013] A massage chair includes a base, a seat body movably mounted on the base, a leg mechanism hinged to the seat body, and a drive mechanism disposed between the base and the seat body. The drive mechanism is used to drive the seat body to move on the base. A leg lifting mechanism with a roller assembly as described above is also provided between the base and the seat body. A contact member is provided on the leg mechanism at a position corresponding to the roller for engaging with the roller. When the second connecting rod lifts the leg mechanism through the roller, the roller abuts against the contact member and rolls along the contact member.

[0014] As a further improvement of this utility model, the lower leg lifting mechanism is arranged in pairs on both sides of the lower leg mechanism, and the two second connecting rods are fixedly connected by a connecting rod.

[0015] A massage chair includes a base, a seat body movably mounted on the base, a leg mechanism hinged to the seat body, and a drive mechanism disposed between the base and the seat body, the drive mechanism being used to drive the seat body to move on the base; a leg lifting mechanism, employing the above-described fixing scheme, is also disposed between the base and the seat body; the leg lifting mechanisms are arranged in pairs on both sides of the leg mechanism.

[0016] The beneficial effects of this utility model are as follows: This solution directly converts the tilting motion of the seat body into the lifting motion of the lower leg mechanism, without the need for independent drive components, which significantly simplifies the structure and reduces costs. At the same time, it eliminates the risk of leakage in hydraulic or pneumatic systems, and can also reduce weight, making it convenient for transportation and movement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the lower leg mechanism in its reset state according to this utility model;

[0018] Figure 2 This is a schematic diagram of the lower leg mechanism of this utility model in its reset state from another perspective.

[0019] Figure 3 This is a side view of the lower leg mechanism of this utility model in its reset state.

[0020] Figure 4 This is a side view of the lower leg mechanism of this utility model in the lifted state.

[0021] Figure 5 This is a schematic diagram of the lower leg lifting mechanism of this utility model.

[0022] Reference numerals: 1. First link; 2. Second link; 3. Support rod; 4. Swing rod; 5. Seat body; 6. Base; 7. Leg mechanism; 71. Abutment; 8. Roller assembly; 81. Connecting rod; 82. Roller; 9. Fixing component. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0024] Reference Figure 1-5 As shown,

[0025] This embodiment provides a calf lifting mechanism, including a first link 1, a second link 2, a support rod 3, and a swing rod 4. The first link 1 is hinged to the seat body 5 and is also hinged to the second link 2. The support rod 3 is hinged to the seat body 5 and is also hinged to the second link 2. The swing rod 4 is hinged to the base 6 and to the first link 1. The hinge position of the first link 1 to the seat body 5 is located between the hinge position of the first link 1 and the second link 2 and the hinge position of the first link 1 and the swing rod 4. The end of the second link 2 away from the hinge position of the first link 1 is used to support the calf mechanism 7. When the seat body 5 moves and tilts relative to the base 6, the first link 1 drives the second link 2 to tilt upward to support and lift the calf mechanism 7.

[0026] When the seat body 5 tilts down, the swing rod 4, constrained by the base 6, swings, causing the first link 1 to rotate around the hinge point of the seat body 5. This, in turn, drives the second link 2 to tilt upwards via a four-bar linkage. Due to the hinge point layout of the first link 1 (located between the hinge point of the second link 2 and the swing rod 4), a lever effect is created, and the end of the second link 2 lifts the leg mechanism 7 with an amplified displacement. This design directly converts the tilting motion of the seat body 5 into the lifting motion of the leg mechanism 7, eliminating the need for independent drive components, significantly simplifying the structure and reducing costs. It also eliminates the risk of leakage in hydraulic or pneumatic systems and reduces weight, facilitating transportation and movement. When the seat body 5 returns to its tilted state, the drive mechanism drives the seat body 5 to move in the opposite direction. At this time, the swing rod 4, constrained by the fixed end of the base 6, swings in the opposite direction, causing the first link 1 to rotate in the opposite direction around its hinge point with the seat body 5. The rotation of the first link 1, through a four-bar linkage, drives the second link 2 to fall downwards around its hinge point with the support rod 3, and the leg mechanism 7 smoothly returns to its original position under its own weight.

[0027] More specifically, during the tilting process of the seat body 5, the first link 1 and the support rod 3 will move along with the seat body 5. At this time, the first link 1 will pry the second link 2. Under the constraint of the support rod 3, the second link 2 will pry. The hinge point between the support rod 3 and the second link 2 forms a fulcrum, which allows the first link 1 to drive the second link 2 to tilt outward, thereby lifting the lower leg mechanism 7.

[0028] The second link 2 in the above scheme can directly contact the lower leg mechanism 7, or it can be further optimized by the following scheme: a roller assembly 8 is fixedly connected to the second link 2, the roller assembly 8 abuts against the lower leg mechanism 7, and the second link 2 supports and lifts the lower leg mechanism 7 through the roller assembly 8.

[0029] In this design, the end of the second link 2 contacts the lower surface of the lower leg mechanism 7 via a roller assembly 8. When the second link 2 is raised, the roller assembly 8 uses rolling friction instead of traditional sliding friction, reducing motion resistance and wear. The rolling friction characteristic makes the raising process of the lower leg mechanism 7 smoother, reduces noise, and extends the life of the mechanism. The introduction of the roller assembly 8 further optimizes the problem of local stress concentration caused by traditional rigid contact, improving user comfort.

[0030] Specifically, the roller assembly 8 includes a connecting rod 81 for fixed connection with the second link 2, and a roller 82 rotatably connected to the connecting rod 81. In this design, the connecting rod 81 is fixedly connected to the second link 2, specifically by means of bolts, while the roller 82 is rotatably mounted on the connecting rod 81 via a pin or bearing. When the second link 2 lifts the lower leg mechanism 7, the roller 82 rolls along the lower surface of the lower leg mechanism 7, forming a rolling pair. This structure avoids surface scratches or jamming caused by sliding friction through rolling friction, while allowing adaptive adjustment when there is a slight displacement deviation during the tilting of the seat body 5, ensuring smooth operation. The connecting rod 81 facilitates adjustment of the position of the roller 82, making the roller 82 position setting more flexible and easier to cooperate with the lower leg mechanism 7.

[0031] As an alternative solution to reduce interference, the support rod 3 is arc-shaped, and the side corresponding to the lower leg mechanism 7 has a concave structure. The concave structure provides sufficient space to reduce interference with the lower leg mechanism 7 and prevent the lower leg mechanism 7 from being affected by the support rod 3 during retraction, thus avoiding impact on the retraction angle.

[0032] Preferably, for ease of overall installation and disassembly, an optional embodiment further includes a fixing member 9 for fixed connection with the seat body 5. The first link 1 and the support rod 3 are hinged to the fixing member 9 at the hinge positions corresponding to the seat body 5. In this solution, the fixing member 9 integrates the hinge points of the first link 1 and the support rod 3, forming a unified installation reference. By concentrating multiple hinge points to the fixing member 9, the dispersed assembly errors on the seat body 5 are reduced, and the motion accuracy of the four-bar linkage is improved. Furthermore, it facilitates pre-installation of the fixing member 9 with the first link 1 and the second link 2, allowing the linkage mechanism to be installed externally before being installed with the seat body 5 and the base 6.

[0033] The above scheme describes various preferred solutions for the calf lifting mechanism. The following also provides a specific implementation scheme for the massage chair:

[0034] A massage chair includes a base 6, a seat body 5 movably mounted on the base 6, a leg mechanism 7 hinged to the seat body 5, and a drive mechanism disposed between the base 6 and the seat body 5, the drive mechanism being used to drive the seat body 5 to move on the base 6; a leg lifting mechanism adopting any of the above preferred embodiments is also provided between the base 6 and the seat body 5.

[0035] When the massage chair's drive mechanism tilts the seat body 5, the leg lifting mechanism converts the displacement of the seat body 5 into the lifting of the leg mechanism 7 through a four-bar linkage. Since this mechanism relies entirely on the movement of the seat body 5 itself, there is no need to add an independent power source such as an electric push rod, which significantly reduces the weight of the entire chair and production costs, and avoids the maintenance problems of hydraulic systems.

[0036] In another embodiment, a massage chair includes a base 6, a seat body 5 movably mounted on the base 6, a leg mechanism 7 hinged to the seat body 5, and a drive mechanism disposed between the base 6 and the seat body 5, the drive mechanism being used to drive the seat body 5 to move on the base 6; a leg lifting mechanism with rollers 82 and connecting rods 81 is also provided between the base 6 and the seat body 5; a contact member 71 is provided on the leg mechanism 7 at a position corresponding to the rollers 82 for engaging with the rollers 82, when the second connecting rod 2 lifts the leg mechanism 7 by the rollers 82, the rollers 82 engage with the contact member 71 and roll along the contact member 71.

[0037] In this design, the surface of the abutment 71 is a flat or arc-shaped structure adapted to the roller 82, forming a directional rolling track. When the second connecting rod 2 lifts the lower leg mechanism 7, the roller 82 rolls along the surface of the abutment 71, stabilizing the movement trajectory of the roller 82 and preventing mechanism instability caused by lateral deviation. The abutment 71 can also be made of wear-resistant materials (such as nylon, polyurethane, or metal) to reduce the wear rate of the rolling pair and extend its service life.

[0038] Specifically, the lower leg lifting mechanisms are arranged in pairs on both sides of the lower leg mechanism 7, and the two second connecting rods 2 are fixedly connected by connecting rods 81.

[0039] The paired lower leg lifting mechanisms on both sides achieve synchronized movement via connecting rods 81, eliminating tilting or jamming caused by uneven force on one side. Connecting rods 81 enhance the coordination of the two second connecting rods 2, ensuring the lower leg mechanism 7 maintains a horizontal posture during lifting and preventing discomfort to the user's legs due to left-right height differences. This design also reduces the load on individual second connecting rods 2 through force dispersion, improving overall durability.

[0040] In another embodiment, a massage chair includes a base 6, a seat body 5 movably mounted on the base 6, a leg mechanism 7 hinged to the seat body 5, and a drive mechanism disposed between the base 6 and the seat body 5, the drive mechanism being used to drive the seat body 5 to move on the base 6; characterized in that a leg lifting mechanism with a fixing member 9 is further provided between the base 6 and the seat body 5; the leg lifting mechanisms are arranged in pairs on both sides of the leg mechanism 7.

[0041] The fixing component 9 can be pre-installed with the first connecting rod 1 and the second connecting rod 2 to complete the positioning. Then, installing the fixing component 9 onto the corresponding position on the seat body 5 ensures that the positions of the lower leg lifting mechanisms on both sides correspond, resulting in better synchronization. This solution not only allows the connecting rods to have a pre-installation function, increasing installation efficiency, but also improves the positioning effect, making the lower leg lifting mechanisms on both sides work more synchronously.

[0042] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A calf lifting mechanism, characterized in that, The system includes a first link, a second link, a support rod, and a swing rod. The first link is hinged to the seat body and is also hinged to the second link. The support rod is hinged to the seat body and to the second link. The swing rod is hinged to the base and to the first link. The hinged position of the first link to the seat body is between the hinged position of the first link and the second link and the hinged position of the first link and the swing rod. The end of the second link away from the hinged position of the first link is used to support the lower leg mechanism. When the seat body moves and tilts relative to the base, the first link drives the second link to tilt upward to support and lift the lower leg mechanism.

2. The lower leg lifting mechanism according to claim 1, characterized in that, A roller assembly is fixedly connected to the second link, and the roller assembly abuts against the lower leg mechanism. The second link supports and lifts the lower leg mechanism through the roller assembly.

3. The lower leg lifting mechanism according to claim 2, characterized in that, The roller assembly includes a connecting rod for fixed connection with the second link, and a roller rotatably connected to the connecting rod.

4. The lower leg lifting mechanism according to claim 1, characterized in that, The support rod is arc-shaped, and the side corresponding to the lower leg mechanism is concave.

5. The lower leg lifting mechanism according to claim 1, 2, 3, or 4, characterized in that, It also includes a fastener for fixing the seat body, wherein the first connecting rod and the support rod are hinged to the fastener at the positions where the seat body is hinged.

6. A massage chair, comprising a base, a seat body movably mounted on the base, a leg mechanism hinged to the seat body, and a drive mechanism disposed between the base and the seat body, the drive mechanism being used to drive the seat body to move on the base; characterized in that, A leg-lifting mechanism as described in any one of claims 1 to 5 is also provided between the base and the seat body.

7. A massage chair, comprising a base, a seat body movably mounted on the base, a leg mechanism hinged to the seat body, and a drive mechanism disposed between the base and the seat body, the drive mechanism being used to drive the seat body to move on the base; characterized in that, A leg-lifting mechanism as described in claim 3 is also provided between the base and the seat body; a contact member is provided on the leg mechanism at the position corresponding to the roller for engaging with the roller. When the second connecting rod lifts the leg mechanism through the roller, the roller abuts against the contact member and rolls along the contact member.

8. The massage chair according to claim 7, characterized in that, The lower leg lifting mechanisms are arranged in pairs on both sides of the lower leg mechanism, and the two second connecting rods are fixedly connected by a connecting rod.

9. A massage chair, comprising a base, a seat body movably mounted on the base, a leg mechanism hinged to the seat body, and a drive mechanism disposed between the base and the seat body, the drive mechanism being used to drive the seat body to move on the base; characterized in that, A leg-lifting mechanism as described in claim 5 is also provided between the base and the seat body; the leg-lifting mechanisms are arranged in pairs on both sides of the leg mechanism.

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