TWI803141B - Assisted standing device - Google Patents

Abstract

The present invention comprises a lower seat, two power sources, two first rod assemblies, two second rod assemblies and an upper seat. The lower seat has a virtual rotation axis, and the fixing parts of the two power sources, one end of the two first rod assemblies and one end of the two second rod assemblies are all pivotally connected to the lower seat. Moreover, the upper seat system is erected on the movable part of the two power sources, the other ends of the two first rod assemblies and the other ends of the two second rod assemblies at the same time. When the movable part of the power source is at the retracted position, the seat cushion is at the seated position. And when the movable part changes to the extended position, it pushes the seat cushion part to rotate with the virtual rotation axis as the center of a circle, and changes from the sitting position to an auxiliary standing position. Therefore, this case has the advantages of taking the knee as the virtual rotation axis, which is quite ergonomic, and the absence of chute can greatly reduce the probability of maintenance and failure.

Description

Assisted standing device

The present invention relates to an auxiliary standing device, especially an auxiliary standing device with the knee as the virtual rotation axis, which is quite ergonomic, and has no chute to greatly reduce the probability of maintenance and failure.

Press, for people with reduced mobility or the elderly, it is not easy to stand up from the seat (or to sit on the seat) sometimes. At present, there are seat devices for assisting standing. The following designs:

1. Taiwan's new patent No. M291289 for a seat device with an auxiliary standing function. The key point is that when the air pressure rod is controlled to expand and contract, it mainly slides in the guide groove of the cushion frame through the pivot point of the air pressure rod to achieve control of the seat cushion. The function of lifting or lowering the frame from the wheelchair body.

Its disadvantage is: the guide groove is very easy to be dirty, once it is dirty, it will affect the smoothness of the movement of the pivot point of the air pressure rod, and if it is serious, it may even be impossible to lift.

2. Taiwan Invention Patent No. I465230 of the wheelchair that can assist standing. The key point is that when controlling the expansion and contraction of the spring push unit, in addition to pushing the seat unit through the third pivot joint assembly, the first pivot joint assembly must also be used to push the seat unit. (including multiple components), the disadvantage is that the related interlocking structure is complicated and the operation is complicated, and it may be inconvenient to operate for handicapped people with inflexible hands and feet.

3. The auxiliary stand-up device of Taiwan's new patent No. M505291 mainly lies in the setting of a two-stay high seat plate, but the two-stay high seat plate can only be raised and lowered. It cannot be rotated, and sitting down and standing up of the human body are not simple lifting movements, but include rotation around the knee as the axis. Therefore, the shortcoming of its design is that the simple lifting cannot fully assist the human body to sit down or stand up.

4. Assisted rising device of US Patent No. 2021100411A1, and

5. About the 2011 Beijing University of Science and Technology Master's Thesis: Toilet Assisted Standing Mechanism. Since the disadvantages of the two designs are similar, they are briefly described as follows:

Its disadvantages include: [a] the chair cushion is raised too high, and the ankle must be raised up, causing the user to step on the toes, which may cause the danger of standing unsteadily and possibly falling; [b] the rotation angle of the seat cushion is too small; [c] it is necessary to It is quite expensive to set up an electric cylinder with a relatively large thrust.

Summarize the shortcomings of the above five designs:

(a) The multiple joint part is a chute, which is easy to get dirty and difficult to clean and maintain.

(b) If the seat cushion is lifted too high, the angular displacement of the thigh will also be large, and the ankle must be raised, which is more likely to cause danger.

(c) The seat rotation angle is too small.

(d) The electric cylinder with a load of 100KG needs a lot of power to push the lower rod:

Refer to Figure 7A, which is a simplified schematic diagram of the mechanism of the aforementioned fifth design (Master's Thesis of Beijing University of Science and Technology in 2011), which is equipped with an electric cylinder GA1, and pushes the seat cushion GA3 through a plurality of connecting rods GA2. And the final thrust rises to over 8000 Newton (N) (the fourth thrust point M4 shown in the fourth curve L4 in FIG. 7B ), which makes the electric cylinder GA1 easy to wear out.

Please refer to Figure 8A again, which is a simplified schematic diagram of the mechanism of the aforementioned fourth design (US Patent No. 2021100411A1), which is provided with an electric cylinder GB1, and pushes the seat cushion GB3 through a plurality of connecting rods GB2. The key point is that the initial thrust needs to exceed 12,000 Newtons (N) (the fifth thrust point M5 shown in the fifth curve L5 in Figure 8B), and it is difficult to find commercially available electric cylinders.

In view of this, must develop the technology that can solve above-mentioned conventional shortcoming.

The purpose of the present invention is to provide an auxiliary standing device, which has the advantages of taking the knee as the virtual rotation axis, which is quite ergonomic, and has no chute, which can greatly reduce the probability of maintenance and failure. In particular, the problem to be solved by the present invention is that the guide groove of the first known device is very easy to be dirty, once it is dirty, it will affect the smoothness of the movement of the pivot point of the air pressure rod, and may even fail to lift. And the second to fifth males However, the known devices have various problems such as complex structure, difficult operation, inability to rotate the seat cushion simply by raising it, too high rise, insufficient rotation angle, and the need to install an electric cylinder with a larger thrust and higher cost.

The technical means to solve the above problems is to provide an auxiliary standing device, which includes: a lower seat, which has a front end, a rear end, an upper end, a lower end, two side ends and a virtual rotation axis; the virtual rotation axis is from The front end extends out and is adjacent to the upper end, and the lower seat has two first pivot joints, two second pivot joints and two third pivot joints; the two first pivot joints are respectively located at the lower end and Distributed at the two side ends, the two second pivot joints are respectively located at the upper end and distributed at the two side ends, the two third pivot joints are respectively located at the two side ends; and the two first pivot joints , the two second pivotal parts and the two third pivotal parts are adjacent to the rear end; two power sources are respectively arranged on the lower seat, and each power source in the two power sources has a fixed part and A movable part, the movable part can be changed at least between a retracted position and an extended position, and the two power sources are respectively pivotally arranged on the two first pivot joints with the ends of the two fixed parts; two first rod assemblies , are respectively pivotally installed on the two second pivot joints with one end thereof; two second rod assemblies are respectively pivotally installed on the two third pivot joints with one end thereof; and an upper seat is pivotally installed on the two power source, the two first rod assemblies and the two second rod assemblies; part and the third pivotal part of the two seat cushions; the first pivotal part of the two seat cushions is for the seat cushion to be pivoted at the end of the two movable parts; the second pivotal part of the two seat cushions is for the seat cushion The second pivot part of the two seat cushions is pivotally arranged at the other end of the two first rod assemblies; the third pivot connection of the two seat cushions The seat cushion is pivotally arranged on the other end of the two second rod assemblies; thereby, when the movable part is located at the retracted position, the seat cushion is erected on the upper end and is located at a seating position; and when The movable part changes to the extended position, and the movable part pushes the seat cushion part to take the virtual rotation axis as a circle center, and rotates correspondingly to the upper end, so as to change from the sitting position to an auxiliary standing position.

The above objects and advantages of the present invention can be easily understood from the detailed description of the following selected embodiments and the accompanying drawings.

The present invention is hereafter described in detail with the following embodiments and accompanying drawings:

10: take a seat

10A: front end

10B: Backend

10C: upper end

10D: lower end

10E: side end

11: The first pivot joint

12: Second pivot joint

13: The third pivot joint

20: power source

21: fixed part

22: Activities Department

30: First rod assembly

40: Second rod assembly

50: Top seat

51: Seat cushion

511: lower extension

52: The first pivot joint of the seat cushion

53: The second pivot joint of the seat cushion

54: The third pivot joint of the seat cushion

90: user

91: knee

92: feet

X: virtual rotation axis

P1: retract position

P2: extended position

PA: seating position

PB: assisted standing position

θ1: first angle

θ2: second angle

GA1, GB1: electric cylinder

GA2, GB2: connecting rod

GA3, GB3: Chair cushion

L1: first curve

L2: second curve

L3: third curve

L4: Fourth Curve

L5: fifth curve

M1: first thrust point

M2: second thrust point

M3: third thrust point

M4: Fourth thrust point

M5: fifth thrust point

Figure 1A is a schematic diagram of the seat in the seat of the present invention.

Figure 1B is a schematic diagram of the corresponding relationship between Figure 1A and the toilet.

Fig. 2 is a schematic diagram of the present invention with the upper seat positioned at the auxiliary standing position.

Figure 3A is a schematic diagram of one of the action processes of the seat of the present invention.

Fig. 3B is a schematic diagram of the second action process of the seat of the present invention.

Figure 3C is a schematic diagram of the third action process of the seat of the present invention.

Figure 4 is a graph of the rotation angle of the first connecting rod of the present invention.

Fig. 5 is a graph of the rotation angle of the second connecting rod of the present invention.

Fig. 6 is a graph of the thrust of the power unit of the present invention.

Figure 7A is a schematic diagram of a simplified mechanism of the known fifth design.

Figure 7B is a graph of the thrust of Figure 7A.

Figure 8A is a schematic diagram of a simplified mechanism of the known fourth design.

Figure 8B is a graph of the thrust of Figure 8A.

Referring to Fig. 1A, Fig. 1B and Fig. 2, the present invention is an auxiliary standing device, which includes:

The lower seat 10 has a front end 10A, a rear end 10B, an upper end 10C, a lower end 10D, two side ends 10E and a virtual rotation axis X. The virtual rotation axis X extends from the front end 10A and is adjacent to the upper end 10C. And the lower seat 10 has two first pivotal portions 11 , two second pivotal portions 12 and two third pivotal portions 13 . The two first pivotal parts 11 are respectively located at the lower end 10D and distributed on the two side ends 10E, the two second pivotal parts 12 are respectively located at the upper end 10C and distributed on the two side ends 10E, the two third The pivotal joints 13 are respectively located at the two side ends 10E; and the two first pivotal joints 11 , the two second pivotal joints 12 and the two third pivotal joints 13 are all adjacent to the rear end 10B.

Two power sources 20 are arranged on the lower seat 10 respectively. Each power source 20 in the two power sources 20 has a fixed part 21 and a movable part 22. The two power sources 20 are respectively connected with the two fixed parts. The ends of 21 are pivotally arranged on the two first pivot joints 11 and can rotate relative to each other, and the two movable parts 22 of the two power sources 20 are at least switchable between a retracted position P1 and an extended position P2.

The two first rod assemblies 30 are respectively pivotally mounted on the two second pivot joints 12 with one ends thereof, and can rotate relative to each other.

The two second rod assemblies 40 are respectively pivotally mounted on the two third pivot joints 13 with one ends thereof, and can rotate relative to each other.

An upper seat 50 is pivotally mounted on the two power sources 20 , the two first rod assemblies 30 and the two second rod assemblies 40 . The upper seat 50 has a cushion portion 51 , and two seat cushion first pivot portions 52 , two seat cushion second pivot portions 53 and two seat cushion third pivot portions 54 located on two sides of the seat cushion portion 51 . The first pivot joint 52 of the two seat cushions is for the seat cushion 51 to be pivotally arranged at the end of the two movable parts 22, and can rotate relatively; the second pivot joint 53 of the two seat cushions is for the seat cushion 51 It is pivotally arranged on the other end of the two first rod assemblies 30 and can rotate relatively, and the third pivot joint 54 of the two seat cushions is for the seat cushion part 51 to be pivotally arranged on the other end of the two second rod assemblies 40 , and can be rotated relatively.

In this way, when the two movable parts 22 are located at the retracted position P1 (as shown in Figure 3A), the seat cushion part 51 is erected on the upper end 10C, and is located at a seating position PA; and when the two movable parts 22 In the process of changing from the retracted position P1 to the extended position P2 (transition from Figure 3A, Figure 3B to Figure 3C in sequence), the two movable parts 22 are all pushing the seat cushion part 51 to make the virtual rotation The axis X is the center of the circle, and the upper end 10C rotates to transform from the sitting position PA to an auxiliary standing position PB.

Practically, each of the two power sources 20 can be an electric cylinder.

The seat cushion portion 51 may further have two lower extension pieces 511, which respectively correspond to the front end 10A and extend downward from both sides of the seat cushion portion 51. The second pivot joints of the two seat cushions The second pivot joint 53 of each seat pad in 53, and the third pivot joint 54 of each seat pad in the third pivot joint 54 of the two seat pads, are located on the corresponding each seat pad one above the other. on the extension piece 511.

When the two movable parts 22 are located at the retracted position P1 (as shown in Figure 3A), and the seat cushion part 51 is located at the seating position PA, the two first link groups 30 are respectively connected to the corresponding two second The two connecting rod groups 40 are approximately parallel.

When the two movable parts 22 are located at the extended position P2 (from Fig. 3A and Fig. 3B to Fig. 3C), and the seat cushion part 51 is located at the auxiliary standing position PB.

There is a first angle θ1 between the two first connecting rod sets 30 and the seat cushion portion 51 .

The first angle θ1 may be between 30.5 degrees and 40.5 degrees.

The first angle θ1 is preferably 35.5 degrees (as shown by the first curve L1 in FIG. 4 , it is about 35.5 degrees at 5 seconds).

And there may be a second angle θ2 between the seat cushion portion 51 and the upper end 10C.

The second angle θ2 may be between 36.2 degrees and 46.2 degrees.

The second angle θ2 is preferably 41.2 degrees (as shown by the second curve L2 in FIG. 5 , it is about 41.2 degrees at 5 seconds).

Referring to Figure 1A, one of the application methods of this case can be an auxiliary seat cushion for a toilet (as shown in Figure 1B) of a toilet for the disabled. And has the following two ways of use:

[a] Riding: As shown in Figures 1A, 1B and 3A. When the movable part 22 is at the retracted position P1, the seat cushion part 51 is erected on the upper end 10C, and at the seating position PA, a user 90 can sit on the toilet, and the knee 91 of the user 90 is close to The virtual rotation axis X (also can be said to be coaxial), and the feet 92 of the user 90 step on the ground smoothly can improve stability.

[b] Assisted standing: as shown in Figures 3B to 3C. Control the movable part 22 to change from the retracted position P1 to the extended position P2, the movable part 22 is to push the seat cushion part 51 to take the virtual rotation axis X as a circle center, and to perform a rotation action corresponding to the upper end 10C, and the The seating position PA is changed to the auxiliary standing position PB.

For example, if the weight of the user 90 is 100 kg, then the thrust required by the relative position (coupling rod) of the power source 20 and the seat cushion 51 can refer to the third curve shown in Fig. 6 L3 (has a first thrust point M1 when corresponding to Fig. 3A). The thrust required at the beginning is the largest (that is, the first thrust point M1), which is about 4796.5 Newtons (N), and the thrust required thereafter becomes smaller and smaller (there is a second thrust point M2 corresponding to Figure 3B), about It is 39146 Newtons (N), and finally only about 2990 Newtons (N) of thrust is required (there is a third thrust point M3 corresponding to Fig. 3C).

That is to say, this case utilizes the electric cylinder (the power source 20) to directly push the seat cushion (the seat cushion part 51), except that the thrust dispersion can be reduced, and the seat cushion part 51 is tied to the knee 91 of the user 90 As the virtual rotation axis X, the most ergonomic standing angle can be used so that the feet 92 of the user 90 can step on smoothly, between the sitting position PA and the auxiliary standing position PB Change, and can safely assist the user 90 to change actions between sitting down and standing. And all the joints (that is, each pivoting part and its pivoting device) are connected and actuated by rotating pairs (removing the disadvantages of the known device that the guide groove or the guide groove is easy to be dirty, which affects the movement of the pivot point).

Features of the present invention:

(1). Simple structure, no chute design, easy maintenance.

(2). Use the electric cylinder to directly push the chair cushion (coupling rod), and use the knee position as the virtual rotation center (in line with ergonomics).

(3). All connectors are swivel pairs.

(4). The maximum driving force of the electric cylinder is small and stable.

Advantage and effect of the present invention can be summarized as follows:

[1] Taking the knee as the virtual axis of rotation is quite ergonomic. In this case, the seat cushion is centered on the virtual rotation axis (that is, the user's knee), and rotates corresponding to the lower seat, so that it can be positioned between the sitting position and the auxiliary standing position at the most ergonomic angle. It can be used to assist the transition between sitting and standing when the user's feet are pedaling smoothly. Therefore, taking the knee as the virtual axis of rotation is quite ergonomic.

[2] No chute can greatly reduce the probability of maintenance and failure. All the pivot joints and related pivot joint elements in this case are designed as "rotating pairs", which greatly reduces the probability of conventional devices being inoperable due to dirty chutes requiring maintenance or failure. Therefore, no chute can greatly reduce the probability of maintenance and failure.

The above is only a detailed description of the present invention through preferred embodiments, and any simple modifications and changes made to the embodiments will not depart from the spirit and scope of the present invention.

10: take a seat

10A: front end

10B: Backend

10C: upper end

10D: lower end

10E: side end

11: The first pivot joint

12: Second pivot joint

13: The third pivot joint

20: power source

21: fixed part

22: Activities Department

30: First rod assembly

40: Second rod assembly

50: Top seat

51: Seat cushion

511: lower extension

52: The first pivot joint of the seat cushion

53: The second pivot joint of the seat cushion

54: The third pivot joint of the seat cushion

X: virtual rotation axis

P2: extended position

PB: assisted standing position

θ1: first angle

θ2: second angle

Claims (7)

An auxiliary standing device, comprising: a lower seat, which has a front end, a rear end, an upper end, a lower end, two side ends and a virtual rotation axis; the virtual rotation axis extends from the front end and is adjacent to the The upper end, and the lower seat has two first pivot joints, two second pivot joints and two third pivot joints, the two first pivot joints are respectively located at the lower end and distributed on the two side ends, the The two second pivotal parts are respectively located at the upper end and distributed on the two side ends, the two third pivotal parts are respectively located at the two side ends; and the two first pivotal parts, the two second pivotal parts and the two third pivot joints are adjacent to the rear end; the two power sources are respectively arranged on the lower seat, each power source in the two power sources has a fixed part and a movable part, and the two power sources The ends of the two fixed parts are respectively pivotally arranged on the two first pivot joints, and the two movable parts of the two power sources can be changed between at least one retracted position and one extended position; two first rod assemblies, One end of which is pivotally arranged on the two second pivot joints respectively; two second rod assemblies are respectively pivotally arranged on the two third pivot joints with one end thereof; and one upper seat is pivotally arranged on the two power sources 1. On the two first rod assemblies and the two second rod assemblies; the upper seat has a cushion part, and two seat cushion first pivot joints and two seat cushion second pivot joints located on both sides of the seat cushion part And the third pivot joint of the two seat cushions, the first pivot joint of the two seat cushions is for the seat cushion to be pivotally arranged at the end of the two movable parts; the second pivot joint of the two seat cushions is for the seat cushion Pivoted at the other end of the two first rod assemblies, and the third pivot joint of the two seat cushions is for the seat cushion to be pivotally arranged at the other end of the two second rod assemblies; thereby, when the two movable parts are located in the retracted position, the seat cushion is erected on the upper end, and is located in a sitting position; and when the two movable parts are changed from the retracted position to the extended position, the two movable parts are all pushing the The seat cushion part takes the virtual rotation axis as a circle center, and rotates corresponding to the upper end, and transforms from the sitting position to an auxiliary standing position. The standing aid device according to claim 1, wherein each of the two power sources is an electric cylinder. The auxiliary standing device as described in claim 1, wherein: the seat cushion part has two lower extension pieces, and the two lower extension pieces correspond to the front ends respectively, and extend downward from two sides of the seat cushion part; Each of the second pivotal parts of the seat pads is located one above the other and one below the third pivotal part of each seat pad in the third pivotal parts of the two seat pads. It should be on each lower extension. The standing aid device as described in claim 1, wherein, when the two movable parts are located at the retracted position and the seat cushion is located at the sitting position, the two first linkage groups are respectively connected to the corresponding two second The connecting rods are roughly parallel. The auxiliary standing device as described in claim 1, wherein: when the two movable parts are located at the extended position, and the seat cushion is located at the auxiliary standing position; between the two first link groups and the seat cushion , all have a first angle; and there is a second angle between the seat cushion portion and the upper end. The standing aid device as claimed in claim 5, wherein: the first angle is between 30.5 degrees and 40.5 degrees; and the second angle is between 36.2 degrees and 46.2 degrees. The standing aid device as described in Claim 6, wherein: the first angle is 35.5 degrees; and The second angle is 41.2 degrees.

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