A seat that can assist a person in getting up and sitting down

Abstract

The present invention discloses a seat that can assist a human body in sitting up and standing up, comprising a seat frame and a seat surface; the seat frame includes a base and telescopic support mechanisms arranged on both sides of the base, the telescopic support mechanisms include push rods, rear vertical rods, front vertical rods, upper cross rods and lower cross rods, both ends of the upper cross rods and the lower cross rods are respectively hinged to the front vertical rods and the rear vertical rods to form a parallelogram linkage mechanism, and the push rods drive the upper cross rods and the lower cross rods to swing up and down along the hinge points between them and the rear vertical rods; both sides of the seat surface are respectively hinged to the front vertical rods located on both sides thereof, and the transmission mechanism drives the seat surface to rotate along the hinge points between it and the front vertical rods when the upper cross rods swing. The present invention combines the principles of ergonomics, imitates the movement of the lower limbs of the human body during its operation, fits the sitting-up and standing-up path of the human body, and provides a boosting force throughout the process, which can well solve the problem of inconvenient sitting up and standing up for people with weak sitting up and standing up due to knee joint pain, degeneration, etc.

Description

Technical Field

[0001] The present invention relates to the field of life assistance devices, and particularly to a seat that can assist a human body to sit up and stand up. Background Art

[0002] As is well known, the two legs are extremely important parts of the human body structure, and various complex movements such as walking, sitting up, etc. are completed through the knee joint structure. However, for people whose knees and limbs are weak in sitting up and standing up due to aging, degeneration or other special reasons, simple daily routines such as going to the toilet and taking a bath often cause them headaches. In order to improve the quality of life of such people and reduce the burden on their families, a seat that can automatically assist a human body to sit up and stand up is urgently needed to be developed.

[0003] Currently, the assisted getting-up seats in the current technology, such as a fully automatic sitting-up and standing-up assisting device in patent document CN201510192873.1, make the seat surface rise and fall to fit the human body through a push rod; however, the motors and lifting hydraulic cylinders that provide power for the push rod have relatively high manufacturing costs, complex structures, and the rotation angle of the seat board depends on the action stroke of the lifting device, so the requirements for the lifting device are relatively high and it is not comfortable to use. Another example is a multi-functional sitting-up and standing-up assisting machine in patent document CN201320402970.5, which has a simple structure. Only the seat board needs to be installed on the supporting vertical rod, and part of the supporting force is provided by the underarm supporting rod, with a relatively low cost; however, this device only drags the whole body through underarm support, and the comfort level is extremely poor, so it is not suitable for a wide range of weak people. Still another example is a toilet assisting device for leg injury patients in patent document CN201420186203.X, which makes the seat surface rise and fall to fit the human body by pushing the seat surface with a hydraulic rod to assist the user to use the toilet; however, its use has too many limitations, it must be fixedly installed on the toilet, and the seat surface and the supporting rod are in line contact, with poor reliability and a high risk of tilting forward and backward. Summary of the Invention

[0004] In view of the problems existing in the prior art, such as complex structure, single function, and poor humanized experience during use, the present invention provides a seat that can assist a human body to sit up and stand up.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] A seat that can assist a human body to sit up and stand up, comprising a seat frame and a seat surface;

[0007] The seat frame includes a base and telescopic support mechanisms arranged on both sides of the base. The telescopic support mechanism includes a push rod, a rear vertical rod, a front vertical rod, an upper cross rod, and a lower cross rod. One end of the rear vertical rod is fixedly arranged on the base. Both ends of the upper cross rod and the lower cross rod are respectively hinged to the front vertical rod and the rear vertical rod to form a parallelogram linkage mechanism. The push rod is arranged on the base, and the push rod drives the upper cross rod and the lower cross rod to swing up and down along the hinge points between them and the rear vertical rod;

[0008] Both sides of the seat surface are hinged to the front vertical rods located on both sides thereof. A transmission mechanism is provided between the parallelogram linkage and the seat surface. When the upper crossbar swings, the transmission mechanism drives the seat surface to rotate along the hinge points between it and the front vertical rods.

[0009] In the above technical solution, further, the transmission mechanism includes a first external gear fixedly arranged on one side of the seat surface, a synchronous gear meshing with the first external gear, a first link gear, a second link gear, and a first internal gear fixedly arranged on the front vertical rod. The first link gear and the synchronous gear are respectively connected to the hinge shaft between the front vertical rod and the upper crossbar. The second link gear is arranged between the first link gear and the first internal gear, and the second link gear is meshingly connected with the first link gear and the first internal gear respectively. The second link gear is rotationally connected to the upper crossbar through a gear shaft.

[0010] In the above technical solution, further, transmission mechanisms are respectively arranged on both sides of the seat surface.

[0011] In the above technical solution, further, the diameters of the first external gear and the synchronous gear are larger than the diameter of the first link gear.

[0012] In the above technical solution, further, the first external gear is of a sector structure.

[0013] In the above technical solution, further, the first internal gear is of a sector structure, and both ends of the first internal gear are fixedly connected to the front vertical rod respectively.

[0014] In the above technical solution, further, in the initial state of the push rod, the seat surface is horizontally arranged. When the push rod extends, the seat surface rises and its front end rotates downward.

[0015] In the above technical solution, further, one end of the push rod is hinged to the base, and the other end is hinged to the upper crossbar.

[0016] In the above technical solution, further, rollers are arranged on the base.

[0017] In the above technical solution, further, handrails are arranged on the front vertical rods.

[0018] The beneficial effects of the present invention:

[0019] 1) In the present invention, a parallelogram linkage mechanism is adopted. The lifting of the seat surface is achieved by driving the parallelogram linkage mechanism. Meanwhile, a transmission mechanism is arranged between the parallelogram linkage mechanism and the seat surface. When the parallelogram linkage mechanism operates, it drives the seat surface to rotate, realizing the combined linkage of the lifting and rotation movements of the seat surface, simulating the sitting and standing path of the human body, and providing a boosting force for the human sitting and standing movement.

[0020] 2) The present invention combines the principles of ergonomics. During its operation, it mimics the movement of the lower limbs of the human body, fits the sitting and standing path of the human body, and provides a boosting force throughout the process, which can well solve the problem of inconvenient sitting and standing for those with weak sitting and standing ability such as knee joint pain and degeneration.

[0021] 3) The structure of the present invention is simple and the operation is convenient. The lifting and rotation of the seat surface can be achieved only by controlling the telescopic movement of the push rod, helping the user to complete the sitting and standing actions.

[0022] 4) The present invention uses a parallelogram structure and a gear transmission mechanism to support and drive the seat surface, with stable and reliable movements and comfortable and safe use. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the initial state of the seat of the present invention.

[0024] Figure 2 It is a schematic structural diagram of the sitting and standing state of the seat of the present invention.

[0025] Figure 3 is Figure 1 a partial schematic diagram at position A in

[0026] Figure 4 It is a schematic structural diagram of the transmission mechanism in Embodiment 1 of the present invention.

[0027] Figure 5 It is a schematic structural diagram of the transmission mechanism in Embodiment 2 of the present invention.

[0028] Figure 6 It is a schematic structural diagram of the transmission mechanism in Embodiment 3 of the present invention.

[0029] Figure 7 It is a schematic structural diagram of the transmission mechanism in Embodiment 4 of the present invention.

[0030] Figure 8 It is a schematic structural diagram of the transmission mechanism in Embodiment 5 of the present invention.

[0031] In the figure: 1, base; 2, seat surface; 3, push rod; 4, rear vertical rod; 5, front vertical rod; 6, upper cross bar; 7, lower cross bar;

[0032] 8. Transmission mechanism, 801. First external gear, 802. Synchronous gear, 803. First link gear, 804. Second link gear, 805. First internal gear, 806. Hinge shaft, 807. Gear shaft;

[0033] 811. Second external gear, 812. Second driving gear;

[0034] 821. Third external gear, 822. Third synchronous pulley, 823. Third intermediate pulley, 824. Third driving pulley;

[0035] 831. Fourth external gear, 832. Fourth synchronous pulley, 833. Fourth intermediate pulley, 834. Fourth driving pulley, 835. Fourth internal gear;

[0036] 841. Fifth driven pulley, 842. Fifth synchronous pulley, 843. Fifth intermediate pulley, 844. Fifth driving pulley, 845. Belt;

[0037] 9. Roller, 10. Armrest, 11. Backrest. Detailed implementation mode

[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0039] Embodiment 1

[0040] As Figure 1 and 2 shown, the seat that can assist a person to sit up and stand up in this embodiment includes a seat frame and a seat surface 2.

[0041] The seat frame includes a base 1 and a telescopic support mechanism arranged on both sides of the base. The telescopic support mechanism includes a push rod 3, a rear vertical rod 4, a front vertical rod 5, an upper cross rod 6 and a lower cross rod 7. One end of the rear vertical rod 4 is fixedly arranged on the base 1 and is vertically arranged at a position on the rear side of the base 1. The front vertical rod 5 is arranged along the vertical direction and is located at a position in the middle above the base. Both ends of the upper cross rod 6 and the lower cross rod 7 are hinged to the front vertical rod 5 and the rear vertical rod 4 respectively to form a parallelogram linkage mechanism. The push rod 3 is arranged on the base 1, and the push rod 3 drives the upper cross rod and the lower cross rod to swing up and down along the hinge points between them and the rear vertical rod.

[0042] In this embodiment, one end of the push rod 3 is hinged to the base 1, and the other end is hinged to the upper cross rod 6. When the push rod extends, it drives the upper cross rod to rotate. At this time, the front vertical rod in the parallelogram linkage mechanism moves upward, driving the seat surface to rise; similarly, when the push rod retracts, the parallelogram linkage mechanism drives the seat surface to descend.

[0043] The two sides of the seat surface 2 are respectively hinged to the front vertical rods 5 located on both sides thereof. A transmission mechanism 8 is provided between the parallel four-bar linkage and the seat surface. When the upper crossbar swings, the transmission mechanism 8 drives the seat surface to rotate along the hinge points between it and the front vertical rods.

[0044] As Figure 1 shown, in the initial state of the push rod 3, the seat surface is horizontally arranged; when the push rod extends, the parallel four-bar linkage and the transmission mechanism act, driving the seat surface to rise and the front end of the seat surface to rotate downward, forming Figure 2 the state shown in the figure, simulating the sitting-up motion of the human body. At this time, the seat provides a boosting force for the human body during the sitting-up process.

[0045] As Figure 3 and 4 shown, the transmission mechanism 8 in this embodiment includes a first external gear 801 fixedly arranged on one side of the seat surface, a synchronous gear 802 meshing with the first external gear, a first link gear 803, a second link gear 804, and a first internal gear 805 fixedly arranged on the front vertical rod. The first link gear 803 and the synchronous gear 805 are respectively connected to the hinge shaft 806 between the front vertical rod and the upper crossbar. The second link gear 804 is arranged between the first link gear 803 and the first internal gear 805. The second link gear 804 is meshingly connected with the first link gear 803 and the first internal gear 805 respectively. The second link gear 804 is rotationally connected to the upper crossbar 6 through a gear shaft 807.

[0046] When the upper crossbar rotates, the speed-increasing gear set composed of the first link gear, the second link gear, and the first internal gear acts. The second link gear rotates, thereby driving the first link gear to rotate. When the first link gear rotates, it drives the synchronous gear to rotate. The diameters of the first external gear and the synchronous gear are larger than the diameter of the first link gear, so that a speed-reducing gear set is formed by the meshing between the synchronous gear and the first external gear. The synchronous gear drives the first external gear to rotate, and drives the seat surface to rotate through the first external gear.

[0047] In this embodiment, the first external gear 801 is of a sector structure; the first internal gear 805 is of a sector structure. The two ends of the first internal gear are respectively fixedly connected to the front vertical rod to facilitate the setting of the first external gear and the first internal gear in the seat.

[0048] In this embodiment, transmission mechanisms 8 are respectively arranged on both sides of the seat surface 2. The two sets of transmission mechanisms provide driving forces for the rotation of the seat surface to ensure the safety of the seat during the movement.

[0049] In this embodiment, the push rod can adopt existing structural members such as electric struts that can realize the telescopic function.

[0050] The operation process of the seat in this embodiment will be described to assist getting up as an example:

[0051] 1) Press the control switch of the push rod. The push rod extends, pushing the upper cross bar to rotate and driving the parallelogram linkage to act, causing the front vertical rod to rise vertically and driving the seat surface to rise; at the same time, when the upper cross bar rotates, it drives the seat surface to rotate through the transmission mechanism, realizing the linkage of the seat surface rising action and the seat surface rotation. At this time, the seat supports the user to sit up and move;

[0052] 2) After the seat moves to a certain height, control the push rod to stop, and the user completes the action of getting up from sitting;

[0053] 3) Press the control switch again, and the seat returns to the initial state.

[0054] Such as Figure 1 , in this embodiment, rollers 9 are provided on the base 1 to facilitate the movement of the seat. Armrests 10 are respectively provided on the front vertical rod 5, and a backrest 11 is provided on the armrest 10, providing auxiliary support for the human body while further improving the safety and comfort of the seat.

[0055] Embodiment Two

[0056] The difference between the seat in this embodiment and that in Embodiment One lies in the different structures of the transmission mechanisms used, which are specifically as follows:

[0057] Such as Figure 5 As shown, the transmission mechanism 8 in this embodiment includes a second external gear 811 fixedly provided on one side of the seat surface and a second driving gear 812 fixedly provided on the hinge shaft. The second external gear 811 and the second driving gear 812 are meshed and connected.

[0058] When the push rod drives the upper cross bar to rotate, it drives the hinge shaft fixedly connected to the upper cross bar to rotate, causing the second driving gear on the hinge shaft to rotate synchronously. The second driving gear drives the second external gear to rotate, thereby driving the seat surface to rotate.

[0059] Embodiment Three

[0060] The difference between the seat in this embodiment and that in Embodiment One lies in the different structures of the transmission mechanisms used, which are specifically as follows:

[0061] Such as Figure 6 As shown, the transmission mechanism 8 in this embodiment includes a third external gear 821 fixedly provided on one side of the seat surface, a third synchronous pulley 822 meshed with the third external gear, a third intermediate pulley 823, and a third transmission pulley 824 meshed with the third intermediate pulley; the third synchronous pulley 822 and the third intermediate pulley 823 are respectively fixedly provided on the hinge shaft 806, and the third transmission pulley 824 is fixedly provided on the upper cross bar 6 through a gear shaft 807.

[0062] When the push rod drives the upper cross bar to rotate, under the action of the third driving wheel, the third intermediate wheel rotates. The third intermediate wheel drives the third synchronous wheel which is also connected to the hinge shaft to rotate, and the third synchronous wheel drives the third external gear to rotate, thereby driving the seat surface to rotate.

[0063] Embodiment Four

[0064] The difference between the seat in this embodiment and that in Embodiment One lies in the different structures of the transmission mechanisms, which are specifically as follows:

[0065] As Figure 7 shown, the transmission mechanism 8 in this embodiment includes a fourth external gear 831 fixedly arranged on one side of the seat surface, a fourth synchronous wheel 832 meshing with the fourth external gear, a fourth intermediate wheel 833, a fourth driving wheel 834 meshing with the fourth intermediate wheel, and a fourth internal gear 835 meshing with the fourth driving wheel; the fourth synchronous wheel 832 and the fourth intermediate wheel 833 are respectively fixedly arranged on the hinge shaft 806, the fourth driving wheel 834 is arranged on the upper cross bar 6 through a gear shaft 807 and is rotatably connected to the upper cross bar 6, and the fourth internal gear 835 is fixedly connected to the front vertical bar 5.

[0066] When the push rod drives the upper cross bar to rotate, the fourth internal gear drives the fourth driving wheel to rotate, the fourth driving wheel drives the fourth intermediate wheel to rotate, the fourth intermediate wheel drives the fourth synchronous wheel which is also connected to the hinge shaft to rotate, and the fourth synchronous wheel drives the fourth external gear to rotate, thereby driving the seat surface to rotate.

[0067] Embodiment Five

[0068] The difference between the seat in this embodiment and that in Embodiment One lies in the different structures of the transmission mechanisms, which are specifically as follows:

[0069] As Figure 8 shown, the transmission structure in this embodiment includes a fifth driven wheel 841, a fifth synchronous wheel 842, a fifth intermediate wheel 843 and a fifth driving wheel 844 meshing with the fifth intermediate wheel, which are arranged on the side hinge shaft on one side of the seat surface. The fifth driven wheel 841 and the fifth synchronous wheel 842 are connected and driven by a belt 845 or a chain, the fifth synchronous wheel 842 and the fifth intermediate wheel 843 are respectively fixedly arranged on the hinge shaft 806, and the fifth driving wheel 841 is fixedly connected to the upper cross bar 6 through a gear shaft 804.

[0070] When the push rod drives the upper cross bar to rotate, the fifth intermediate wheel rotates under the action of the fifth driving wheel. The fifth intermediate wheel drives the fifth synchronous wheel which is also connected to the hinge shaft to rotate, and the fifth synchronous wheel drives the fifth driven wheel to rotate through a belt or a chain, thereby driving the seat surface to rotate.

[0071] The description and drawings of the present invention are considered illustrative rather than restrictive. Based on the present invention, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor according to the disclosed technical content, and all of them are within the protection scope of the present invention.

Claims

1. A seat that can assist a human body to sit up, comprising a seat frame and a seat surface, characterized in that: The seat frame includes a base and telescopic support mechanisms arranged on both sides of the base. The telescopic support mechanisms include push rods, rear vertical rods, front vertical rods, upper cross rods and lower cross rods. One end of the rear vertical rod is fixedly arranged on the base and is vertically arranged at a position on the rear side of the base. The front vertical rod is arranged in the vertical direction and is located at a position in the middle above the base. Both ends of the upper cross rod and the lower cross rod are respectively hinged to the front vertical rod and the rear vertical rod to form a parallelogram linkage mechanism. The push rod is arranged on the base, and the push rod drives the upper cross rod and the lower cross rod to swing up and down along the hinge points between them and the rear vertical rod; Both sides of the seat surface are respectively hinged to the front vertical rods located on both sides thereof. A transmission mechanism is arranged between the parallelogram linkage mechanism and the seat surface. When the upper cross rod swings, the transmission mechanism drives the seat surface to rotate along the hinge points between it and the front vertical rods; The transmission mechanism includes a first external gear fixedly arranged on one side of the seat surface, a synchronous gear meshing with the first external gear, a first link gear, a second link gear and a first internal gear fixedly arranged on the front vertical rod. The first link gear and the synchronous gear are respectively connected to the hinge shaft between the front vertical rod and the upper cross rod. The second link gear is arranged between the first link gear and the first internal gear, and the second link gear is respectively meshed and connected with the first link gear and the first internal gear. The second link gear is rotationally connected to the upper cross rod through a gear shaft; An armrest is arranged on the front vertical rod.

2. The seat capable of assisting a human body to sit up according to claim 1, wherein: Transmission mechanisms are respectively arranged on both sides of the seat surface.

3. The seat capable of assisting a human body to sit up according to claim 1, wherein: The diameters of the first external gear and the synchronous gear are larger than the diameter of the first link gear.

4. The seat capable of assisting a human body to sit up according to claim 1, wherein: The first external gear is of a sector structure.

5. The seat capable of assisting a human body to sit up according to claim 1, characterized in that: The first internal gear is of a sector structure, and both ends of the first internal gear are respectively fixedly connected to the front vertical rod.

6. The seat capable of assisting a human body to sit up according to any one of claims 1-5, wherein: When the push rod is in the initial state, the seat surface is horizontally arranged. When the push rod extends, the seat surface rises and its front end rotates downward.

7. The seat capable of assisting a human body to sit up according to claim 1, wherein: One end of the push rod is hinged to the base, and the other end is hinged to the upper cross rod.

8. The seat capable of assisting a human body to sit up according to claim 1, wherein: Rollers are arranged on the base.

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