Movable seat surface adjusting mechanism

Abstract

The utility model discloses a movable seat surface adjusting mechanism, it includes seat surface, seat surface is with two halves hip respectively contact and the movable setting left seat panel and right seat panel is composed, is equipped with the pivot and pivot drive mechanism under the seat surface, is equipped with two or two or more than cam that contact respectively with left seat panel and right seat panel on the pivot, and the cam of pivot rotation can drive left seat panel and right seat panel realize alternate subsidence and restore horizontal state movement, the adjusting mechanism height is lower, can ensure that the contact surface height of health care chair and hip is moderate, and does not influence the comfort, and only needs a pivot drive mechanism drive pivot rotation to realize left seat panel and right seat panel alternate subsidence and restore horizontal state movement, and the cost is low.

Description

Technical Field

[0001] This utility model relates to health care equipment, and in particular to a movable seat adjustment mechanism. Background Technology

[0002] The patent, titled "A Health Chair with a Movable Seat for Leg Movement in a Sitting Position" and published under patent number CN 117918659 A, includes a frame with a seat surface inside. The seat surface consists of a left seat panel and a right seat panel that respectively contact the two buttocks. The left and right seat panels are movably connected to the frame via hinge shafts on opposite sides. The seat surface has an elastic cushion to prevent buttock pinching. A support seat is provided under the seat surface. Telescopic rods are provided between the support seat and the left seat panel, and between the support seat and the right seat panel. The two telescopic rods alternately extend and retract, driving the left and right seat panels to rotate back and forth around the hinge shafts. This allows one buttock to sit on the left or right seat panel while the other is suspended, ultimately enabling leg movement in a sitting position and solving the technical problem of poor blood circulation and blocked meridians after prolonged sitting. However, the presence of a support base and two telescopic rods under the seat, along with an elastic cushion on the seat, increases the contact area between the chair and the buttocks, affecting comfort. In addition, the two telescopic rods increase the cost of the drive unit. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a movable seat adjustment mechanism to solve the technical problems raised in the background art.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A movable seat adjustment mechanism includes a seat surface, which is composed of a left seat panel and a right seat panel that are movably disposed and in contact with the two buttocks respectively. A rotating shaft and a rotating shaft drive mechanism are provided below the seat surface. Two or more cams are provided on the rotating shaft that are in contact with the left seat panel and the right seat panel respectively. The cams that rotate with the rotating shaft can drive the left seat panel and the right seat panel to alternately sink and return to a horizontal state.

[0006] Furthermore, the sinking includes the entire left or right seat panel lowering or tilting and flipping downwards.

[0007] Furthermore, it also includes a frame that defines the position and downward trajectory of the left and right seat panels.

[0008] Furthermore, when the rotating shaft rotates to a specific angle, the left and right seat panels that are in contact with the cam are located on the same horizontal plane.

[0009] Furthermore, push rods that contact the end of the cam are provided on the left and right seat panels.

[0010] Furthermore, the cam is formed by cutting off the cylindrical portion from a plane parallel to the cylindrical axis, and the cam is coaxially connected to the rotating shaft.

[0011] Furthermore, when the push rod contacts the cam base surface of the cam, the left or right seat panel is at its lowest point, and when the push rod contacts the cam surface of the cam, the left or right seat panel is in a horizontal state.

[0012] Furthermore, there are two cams. After one cam rotates 180° around the axis, its outer contour surface coincides with that of the other cam, and the cam surface area of ​​the two cams is greater than 180°.

[0013] Furthermore, the cam surface area of ​​the two cams is 190-220°.

[0014] Furthermore, the cam is formed by two planes parallel to the axis of the cylinder, which are mirror images of the two parts of the cylinder, and the two cams that contact the left and right seat panels are arranged at 90° angles to each other.

[0015] The beneficial effects of this utility model are:

[0016] The movable seat adjustment mechanism proposed in this utility model uses a cam that rotates with the pivot to drive the left and right seat panels to perform the following movements in sequence: left and right seat panels are horizontal; left seat panel lowers, right seat panel is horizontal; left seat panel rises, right seat panel is horizontal; left and right seat panels are horizontal; left seat panel is horizontal, right seat panel lowers; left seat panel is horizontal, right seat panel rises; left and right seat panels are horizontal. This adjustment mechanism has a low height, which ensures that the contact surface between the chair and the buttocks is at a moderate height without affecting comfort; and only one pivot drive mechanism is needed to drive the pivot to rotate to achieve the alternating lowering and returning of the left and right seat panels to a horizontal state, which is low in cost.

[0017] Since the conventional materials for the seat surface are plastic, wood, etc., which are not wear-resistant, push rods are provided on the left and right seat panels to contact the end of the cam. The push rods are made of wear-resistant materials or rollers are installed under the push rods to avoid the seat surface from contacting the diameter of the cam and to improve the service life of the seat surface.

[0018] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a three-dimensional view of the first state of Embodiment 1 of this utility model.

[0021] Figure 2 This is a perspective view of the second state of Embodiment 1 of this utility model.

[0022] Figure 3 This is a perspective view of the third state of Embodiment 1 of this utility model.

[0023] Figure 4 This is a perspective view of a cam mounted on a rotating shaft in Embodiment 1 of this utility model.

[0024] Figure 5 This is a perspective view of the first state of Embodiment 2 of this utility model.

[0025] Figure 6 This is a perspective view of the second state of Embodiment 2 of this utility model.

[0026] Figure 7 This is a perspective view of the third state of Embodiment 2 of this utility model.

[0027] Figure 8 This is a perspective view of a cam mounted on a rotating shaft in Embodiment 2 of this utility model.

[0028] Figure 9 This is a perspective view of Embodiment 3 of the present utility model.

[0029] In the picture: Detailed Implementation

[0030] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0031] Example 1

[0032] like Figure 1-4The movable seat adjustment mechanism shown includes a frame 1 with a front opening, multiple chair legs under the frame 1, a backrest at the rear of the frame 1, and a seat inside the frame 1. The seat consists of a left seat panel 2 and a right seat panel 3 that contact the two buttocks respectively. There are several ways to connect the left seat panel 2 and the right seat panel 3 to the frame 1, such as sliding the left seat panel 2 and the right seat panel 3 up and down with the frame 1, or hinged to the frame 1 on opposite sides via hinge shafts. A rotating shaft 4 and a rotating shaft drive mechanism 5 are provided below the seat along the left and right direction. The rotating shaft drive mechanism 5 is a motor. A support frame is provided between the multiple chair legs, and two support blocks 6 are provided on the support frame. The two support blocks 6 support the two ends of the rotating shaft 4, and the motor is fixed on the support blocks 6. Two cams 7 are provided on the rotating shaft 4, which contact the left seat panel 2 and the right seat panel 3 respectively. The cams 7 are formed by cutting off the cylindrical part of the plane parallel to the axis of the cylinder. The cams 7 are coaxially connected to the rotating shaft 4. When one cam 7 rotates 180° around the rotating shaft, its outer contour surface coincides with the other cam 7. The cam surface 8 areas of the two cams 7 are greater than 180°, for example, the cam surface 8 areas of the two cams 7 are 190-220° respectively. Since the conventional materials of the seat surface are plastic, wood and other materials that are not wear-resistant, push rods 9 that contact the ends of the cams are provided on the left seat panel 2 and the right seat panel 3. The push rods 9 are made of wear-resistant materials or rollers are set under the push rods 9. The cam 7, rotating with the pivot 4, drives the left seat panel 2 and right seat panel 3 to sequentially achieve the following movements: left seat panel 2 and right seat panel 3 are horizontal; left seat panel 2 is lowered or tilted downwards; right seat panel 3 is horizontal; left seat panel 2 is raised; right seat panel 3 is horizontal; left seat panel 2 and right seat panel 3 are horizontal; left seat panel 2 is horizontal; right seat panel 3 is lowered or tilted downwards; left seat panel 2 is horizontal; right seat panel 3 is raised; left seat panel 2 and right seat panel 3 are horizontal. This adjustment mechanism has a low height, ensuring that the contact surface between the chair and the buttocks is at a moderate height without affecting comfort. Furthermore, only one pivot drive mechanism 5 is needed to drive the pivot to rotate, achieving the alternating lowering and returning of the left seat panel 2 and right seat panel 3 to a horizontal state, resulting in low cost. The frame 1 is used to limit the position and lowering trajectory of the left seat panel 2 and right seat panel 3. The top rod 9 is used to prevent the seat surface from contacting the diameter of the cam 7, improving the service life of the seat surface.

[0033] Example 2

[0034] like Figure 5-8The difference between the illustrated embodiment and Embodiment 1 is that: cam 7 is formed by two planes parallel to the cylindrical axis, mirror images of the two parts of the cylinder being cut off. The two cams 7 that contact the left seat panel 2 and the right seat panel 3 respectively are arranged at 90° staggered, with an arc transition between the cam base surface 10 and the cam surface 9. Cam 7, which rotates with the rotating shaft 4, can drive the left seat panel 2 and the right seat panel 3 to achieve the following movements in sequence: left seat panel 2 and right seat panel 3 are horizontal, left seat panel 2 is lowered or tilted downwards, right seat panel 3 is slightly raised (the degree of raising is negligible), left seat panel 2 is raised, right seat panel 3 remains unchanged, left seat panel 2 and right seat panel 3 are horizontal, left seat panel 2 is slightly raised (the degree of raising is negligible), right seat panel 3 is lowered or tilted downwards, left seat panel 2 remains unchanged, right seat panel 3 is raised, left seat panel 2 and right seat panel 3 are horizontal.

[0035] Example 3

[0036] like Figure 9The movable seat adjustment mechanism shown includes a frame 1 with a top opening. A seat surface is provided inside the frame 1, consisting of a left seat panel 2 and a right seat panel 3 that respectively contact the two buttocks. The left and right seat panels 2 and 3 can be connected to the frame 1 in various ways, such as sliding vertically, or hinged to the frame 1 on opposite sides via hinge shafts. A rotating shaft 4 and a rotating shaft drive mechanism 5 are provided below the seat surface along the left-right direction. The rotating shaft drive mechanism 5 is a motor. The rotating shaft 4 is supported by two support blocks 6, which are located on the inner bottom surface of the frame 1. The seat panel has two cams 7 that contact the left seat panel 2 and the right seat panel 3 respectively. The cams 7 are formed by cutting off the cylindrical part of the plane parallel to the axis of the cylinder. The cams 7 are coaxially connected to the rotating shaft 4. When one cam 7 rotates 180° around the rotating shaft, its outer contour surface coincides with the other cam 7. The cam surface area 8 of the two cams 7 is greater than 180°. The cam surface area 8 of the two cams 7 is better at 190-220°. Since the conventional materials of the seat surface are plastic, wood and other materials that are not wear-resistant, push rods 9 that contact the ends of the cams 7 are provided on the left seat panel 2 and the right seat panel 3. The push rods 9 are made of wear-resistant materials or rollers are set under the push rods 9. The cam 7, rotating with the pivot 4, drives the left seat panel 2 and right seat panel 3 to sequentially achieve the following movements: left seat panel 2 and right seat panel 3 are horizontal; left seat panel 2 is lowered or tilted downwards; right seat panel 3 is horizontal; left seat panel 2 is raised; right seat panel 3 is horizontal; left seat panel 2 and right seat panel 3 are horizontal; left seat panel 2 is horizontal; right seat panel 3 is lowered or tilted downwards; left seat panel 2 is horizontal; right seat panel 3 is raised; left seat panel 2 and right seat panel 3 are horizontal. This adjustment mechanism has a low height and can be used independently. It can be placed on an existing chair or a sofa without affecting comfort. Furthermore, only one pivot drive mechanism 5 is needed to drive the pivot 4 to achieve the alternating lowering and returning of the left seat panel 2 and right seat panel 3 to a horizontal state, resulting in low cost. The frame 1 is used to limit the position and lowering trajectory of the left seat panel 2 and right seat panel 3. The top rod 9 is used to prevent the seat surface from contacting the diameter of the cam 7, thus improving the service life of the seat surface.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A movable seat adjustment mechanism, comprising a seat surface, said seat surface being composed of a left seat panel (2) and a right seat panel (3) respectively contacting and movably disposed on the two buttocks, characterized in that: A rotating shaft (4) and a rotating shaft drive mechanism (5) are provided below the seat surface. Two or more cams (7) are provided on the rotating shaft (4) to contact the left seat panel (2) and the right seat panel (3) respectively. The cams (7) that rotate with the rotating shaft (4) can drive the left seat panel (2) and the right seat panel (3) to alternately sink and return to a horizontal state.

2. The movable seat adjustment mechanism according to claim 1, characterized in that: The sinking includes the entire left seat panel (2) or right seat panel (3) being lowered or tilted and flipped downwards.

3. The movable seat adjustment mechanism according to claim 1 or 2, characterized in that: It also includes a frame (1) for defining the position and downward trajectory of the left seat panel (2) and the right seat panel (3).

4. The movable seat adjustment mechanism according to claim 1, characterized in that: When the rotating shaft (4) rotates to a certain angle, the left seat panel (2) and the right seat panel (3) that are in contact with the cam (7) are on the same horizontal plane.

5. The movable seat adjustment mechanism according to claim 4, characterized in that: Push rods (9) that contact the end of the cam (7) are provided on the left seat panel (2) and the right seat panel (3).

6. The movable seat adjustment mechanism according to claim 5, characterized in that: The cam (7) is formed by cutting off the cylindrical part of a plane parallel to the cylindrical axis, and the cam (7) is coaxially connected to the rotating shaft (4).

7. The movable seat adjustment mechanism according to claim 6, characterized in that: When the push rod (9) contacts the cam base surface (10) of the cam (7), the left seat panel (2) or the right seat panel (3) can be located at the lowest point, and when the push rod (9) contacts the cam surface (8) of the cam (7), the left seat panel or the right seat panel is in a horizontal state.

8. The movable seat adjustment mechanism according to claim 7, characterized in that: The cam (7) consists of two cams. After one cam (7) rotates 180° around the axis (4), its outer contour surface coincides with that of the other cam (7), and the cam surface (8) area of ​​the two cams (7) is greater than 180°.

9. The movable seat adjustment mechanism according to claim 8, characterized in that: The cam surface (8) area of ​​the two cams (7) is 190-220°.

10. The movable seat adjustment mechanism according to claim 7, characterized in that: The cam (7) is formed by two planes parallel to the axis of the cylinder, which are mirror images of the two parts of the cylinder. The two cams (7) that contact the left seat panel (2) and the right seat panel (3) are arranged at 90° in an alternating manner.

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