CN114469657A - A kind of assisting device for assisting the elderly to walk - Google Patents

Abstract

The invention provides a power assisting device for assisting the walking of the old, which comprises a base, and a plane connecting rod mechanism and a cam mechanism which are oppositely arranged on two sides of the base, wherein the plane connecting rod mechanism is associated with the corresponding cam mechanism, the cam mechanism is driven by a driving part to rotate, the cam mechanisms on the two sides have a preset phase difference, and the two groups of plane connecting rod mechanisms are driven to alternately swing so as to assist the lifting of thighs and the stepping of shanks around the rotation of knee joints. The invention can drive the two groups of plane link mechanisms to alternatively swing by means of the plane link mechanisms which are oppositely arranged on the two sides of the base and the cam mechanisms which rotate at the same speed difference, so that the old can walk in a sitting posture, the safety can be improved on the premise of meeting the requirement of independent activities of the old, helping the old to maintain the motor function and exercising the strength of lower limbs, and potential safety hazards caused by falling of the old and the like can be avoided.

Description

A kind of assisting device for assisting the elderly to walk

technical field

The invention relates to the technical field of assisting walking devices, in particular to an assisting device for assisting the elderly to walk.

Background technique

In recent years, my country's population aging has become increasingly serious. The elderly are prone to problems such as shaking and instability during walking due to muscle degeneration and damage to movable joints, reduced joint motion range, and insufficient lower limb strength. Using auxiliary devices to help the elderly move in a sitting position can solve the problems caused by the lack of lower limb strength in the elderly. It can meet the needs of the elderly for independent activities, and can also help the elderly maintain motor function and exercise lower limb strength. The existing assisted walking device has a simple structure and no protective measures, and cannot fundamentally solve the problem of the elderly struggling with their legs. These designs are insufficient in terms of humanization. Therefore, there is an urgent need for a device that can assist the elderly to move while being safe and labor-saving. installation.

It should be noted that the above description of the technical background is only for the convenience of clearly and completely describing the technical solutions of the present application and facilitating the understanding of those skilled in the art. It should not be assumed that the above-mentioned technical solutions are known to those skilled in the art simply because these solutions are described in the background section of this application.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a device for assisting the lift of the thigh of the elderly and the rotation of the calf around the knee joint in order to improve the user experience and ensure safety.

In order to achieve the above object, the present invention provides a power assist device for assisting the elderly to walk, including a base, a plane link mechanism and a cam mechanism arranged on both sides of the base, the plane link mechanism is connected to the corresponding The cam mechanism is associated with the cam mechanism, the cam mechanism is driven by the driving part to rotate, and the cam mechanisms on both sides have a preset phase difference, which drives the two groups of plane link mechanisms to swing alternately, assisting the lifting of the thigh and the winding of the calf around the knee. Rotation of the joint steps out.

Further, the plane link mechanism includes a first link, a second link, a third link, a fourth link and a fifth link located on the same plane, the first link, the second link The connecting rod and the third connecting rod are hinged in sequence, the first end of the fourth connecting rod is hinged with the third connecting rod, the second end is hinged with the corresponding cam mechanism, and the fifth connecting rod is hinged with the third connecting rod. The first end is hinged with the second link, and the second end is hingedly arranged.

Further, the cam mechanism includes a cam, the cams on both sides have a phase difference, and are connected by a linkage shaft to rotate synchronously.

Further, the second end of the fifth link is hinged with the linkage shaft, the second end of the first link is hinged with the base, and the first link is associated with the cam, The third link is used to control the movement trajectory of the lower leg.

Further, the first link is in contact with the outer edge of the cam, and the fourth link is hinged with a point on the side wall of the cam.

Further, a strap ring is arranged on the third link, and the strap ring can bind the lower leg portion to the third link.

Further, the third link is also provided with a movable slot, and the hinge point of the fourth link and the third link can move along the movable slot to adjust the position.

Further, the driving part includes a motor and a gear reduction mechanism, the motor is arranged on the base, the gear reduction mechanism includes a first gear shaft and a second gear shaft, the first gear shaft, the Both second gear shafts are rotatably connected to the base, a first large gear and a second pinion are mounted on the first gear shaft, and the first large gear is connected to the first pinion mounted on the output shaft of the motor Meshing, the second gear shaft is mounted with a second large gear that meshes with the second pinion, and a third pinion is installed at the same time, the third pinion is installed on the linkage shaft. Gears mesh.

Further, a seat cushion, a backrest, and an armrest are also installed on the base.

Further, a plurality of rollers are installed on the bottom end of the base, and the rollers are freely rotatably connected with the corresponding roller mounting seats, and the roller mounting seats are universally connected with the base.

The above-mentioned scheme of the present invention has the following beneficial effects:

The device for assisting the elderly to walk provided by the present invention relies on the plane link mechanism arranged on both sides of the base and the cam mechanism that rotates with constant velocity difference, which can drive two groups of plane link mechanisms to swing alternately, assisting the lifting of the elderly's thighs. Lifting and turning of the calf around the knee joint enables the elderly to walk in a sitting position, which can improve the safety while meeting the needs of the elderly for independent activities, helping the elderly maintain motor function, and exercising the strength of the lower limbs, and avoid the elderly from falling. hidden danger;

The invention has the advantages of simple manufacture and low cost, and is suitable for mass production and popularization and application;

Other beneficial effects of the present invention will be described in detail in the following detailed description section.

Description of drawings

Fig. 1 is the front view of the overall structure of the present invention;

Fig. 2 is the overall structure side view of the present invention;

FIG. 3 is a schematic diagram of the application of the present invention.

[Description of reference numerals]

1-first link; 2-second link; 3-third link; 4-fourth link; 5-fifth link; 6-base; 7-linkage shaft; 8-cam; 9 - strap ring; 10 - movable groove; 11 - motor; 12 - first gear shaft; 13 - second gear shaft; 14 - first large gear; 15 - first pinion; 16 - second pinion; 17 -Second largest gear; 18-Third pinion; 19-Third gear; 20-Cushion; 21-Backrest; 22-Arrest; 23-Roller.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a locking connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in FIG. 1 and FIG. 3 , an embodiment of the present invention provides a power assist device for assisting the elderly to walk, including a plane link mechanism and a cam mechanism. Among them, two groups of plane link mechanism and cam mechanism are arranged oppositely, distributed on both sides of the base 6, corresponding to the control of the left leg and the right leg. The cam mechanism adopts the method of constant velocity differential phase rotation to drive the two groups of plane link mechanisms to swing alternately, assisting the lift of the elderly's thigh and the rotation of the calf around the knee joint.

In this embodiment, the planar link mechanism includes a first link 1 , a second link 2 , a third link 3 , a fourth link 4 and a fifth link 5 located on the same plane (vertical plane). Among them, the first link 1, the second link 2, and the third link 3 are hinged in sequence, one end of the fourth link 4 is hinged with the third link 3, and the other end is hinged with the cam mechanism. One end is hinged with the second connecting rod 2, and the other end is hinged with the linkage shaft 7, which supports the second connecting rod 2. The linkage shaft 7 is arranged laterally relative to the base 6, and the two ends are respectively connected with the plane linkage mechanism on both sides. The fifth link 5 is hinged, so that the plane link mechanism and the cam mechanism on both sides are linked. The other end of the first link 1 is hinged with the base 6 and can rotate around the hinge, while the first link 1 is in contact with the cam mechanism to complete the action of raising the thigh under the action of the cam mechanism. The second link 2 is used to connect the first link 1 and the third link 3, and the third link 3 is used to control the movement trajectory of the lower leg.

Since the third link 3 is hinged and associated with the cam mechanism through the fourth link 4, the movement law of the third link 3 can be synchronized with the movement of the cam mechanism to achieve a reasonable movement law of the calf.

In this embodiment, the cam mechanism includes a cam 8, and the cam 8 is drivingly connected with the linkage shaft 7 through a key. In this embodiment, the cam mechanisms on both sides have a preset phase difference (180 degrees or about 180 degrees), so that the action of the cam 8 driving the plane link mechanisms on both sides matches the walking posture of the person.

In this embodiment, the first link 1 is in contact with the outer edge of the cam 8 , and the cyclic action of raising the thigh and lowering the thigh is completed around the hinge point of the base 6 under the rotational drive of the cam 8 . The fourth link 4 is hinged with a point on the side wall of the cam 8, so when the linkage shaft 7 and the cam 8 rotate, the fourth link 4 can transmit the rotational displacement of the cam 8, so that the third link fixed with the lower leg 3 Swing, etc., to control the movement trajectory of the calf.

In this embodiment, a strap ring 9 is arranged on the third link 3, and the calf is bound to the third link 3 by means of the strap ring 9, so that the calf is fixed relative to the third link 3. The third link 3 controls the movement trajectory of the lower leg.

As a further improvement, in this embodiment, the third link 3 is provided with a movable slot 10, and the hinge point of the fourth link 4 and the third link 3 can move along the movable slot 10 to adjust the position, so that when the device is in use, the third link The movement of the link 3 is more flexible, ensuring that the user's calf is more relaxed when using it, and there is no feeling of restraint during walking.

Meanwhile, as shown in FIG. 2 , the linkage shaft 7 in this embodiment is driven to rotate by the motor 11 and the gear reduction mechanism. The motor 11 is arranged on the rear side of the base 6 , and the gear reduction mechanism includes a first gear shaft 12 and a second gear shaft 13 . . The first gear shaft 12 is sleeved with a first large gear 14, and the first large gear 14 meshes with the first pinion 15 sleeved on the output shaft of the motor 11 to perform a first-stage deceleration. At the same time, a second pinion gear 16 is sleeved on the first gear shaft 12 , and a second large gear 17 meshing with the second pinion gear 16 is sleeved on the second gear shaft 13 to perform secondary reduction. A third pinion gear 18 is also sleeved on the second gear shaft 13 , and the third pinion gear 18 meshes with the third large gear 19 sleeved on the linkage shaft 7 to perform three-stage deceleration. By means of three-stage deceleration, the output of the motor 11 is converted into the rotational speed of the linkage shaft 13 and the cam 8 matching the walking posture of the elderly.

Among them, the gears are connected with the corresponding shafts by keys to transmit torque.

Please refer to FIG. 3 again, in this embodiment, the base 6 is also provided with a seat cushion 20 and a backrest 21, and the elderly can walk in a sitting position when using, which can meet the needs of the elderly for independent activities, help the elderly maintain motor function, and exercise the strength of the lower limbs. Under the premise of the premise, it can improve the safety, avoid the safety hazards caused by the fall of the elderly, and it is convenient to lean back and rest directly after walking for a period of time.

At the same time, the base 6 is also provided with a handrail 22, which is convenient for the elderly to hold the device while walking, and better maintain stability.

In addition, the bottom end of the base 6 is also provided with a plurality of rollers 23, the rollers 23 are freely rotatably connected with the corresponding roller mounting seat, and the roller mounting seat is connected to the base 6 in a universal manner. Therefore, the base 6 can be rolled and supported by the rollers 23, so that the base 6 moves with the elderly when the elderly walk.

When in use, the motor 11 is controlled to turn on and rotate through a switch, etc. The motor 11 drives the linkage shaft 7 and the cam 8 to rotate through the three-stage deceleration, and drives the plane linkage mechanism on the left and right sides to move, and has a phase difference, so that the first on the left and right sides is moved. The link 1 and the third link 3 swing alternately to control the movement of the legs.

The device provided in this embodiment has the advantages of simple manufacture and low cost, and is suitable for mass production and popularization and application.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (10)

1. A power assist device for assisting the elderly to walk, characterized in that it comprises a base, a plane link mechanism and a cam mechanism that are relatively arranged on both sides of the base, and the plane link mechanism and the corresponding cam mechanism The cam mechanism is driven by the driving part to rotate, and the cam mechanisms on both sides have a preset phase difference, driving the two groups of plane link mechanisms to swing alternately, assisting the lifting of the thigh and the rotation of the calf around the knee joint step out. 2 . The power assist device for assisting the elderly to walk according to claim 1 , wherein the planar link mechanism comprises a first link, a second link, a third link, and a fourth link located on the same plane. 3 . connecting rod and fifth connecting rod, the first connecting rod, the second connecting rod and the third connecting rod are hinged in sequence, and the first end of the fourth connecting rod is hinged with the third connecting rod, The second end is hinged with the corresponding cam mechanism, the first end of the fifth link is hinged with the second link, and the second end is hinged. 3 . The power assist device for assisting the elderly to walk according to claim 2 , wherein the cam mechanism comprises a cam, and the cams on both sides have a phase difference and are connected by a linkage shaft to rotate synchronously. 4 . 4 . The power assist device for assisting the elderly to walk according to claim 3 , wherein the second end of the fifth link is hinged with the linkage shaft, and the second end of the first link is hinged with the linkage shaft. 5 . The base is hinged, while the first link is associated with the cam, and the third link is used to control the movement track of the lower leg. 5 . The power assist device for assisting the elderly to walk according to claim 4 , wherein the first link is in contact with the outer edge of the cam, and the fourth link is in contact with the side wall of the cam. 6 . A little hinge on the top. 6 . The power assist device for assisting the elderly to walk according to claim 2 , wherein a strap ring is arranged on the third link, and the strap ring can connect the lower leg with the third link. 7 . Rod binding. 7 . The power assist device for assisting the elderly to walk according to claim 2 , wherein a movable groove is further opened on the third link, and the fourth link is hinged with the third link. 8 . The point can be moved along the movable slot to adjust the position. 8 . The power assist device for assisting the elderly to walk according to claim 4 , wherein the driving part comprises a motor and a gear reduction mechanism, the motor is arranged on the base, and the gear reduction mechanism comprises a first gear shaft and a second gear shaft, the first gear shaft and the second gear shaft are both rotatably connected with the base, the first gear shaft is mounted with a first large gear and a second pinion, The first large gear meshes with the first pinion mounted on the output shaft of the motor, the second gear shaft is mounted with a second large gear meshed with the second pinion, and a third small gear is mounted on the second gear shaft. gear, the third pinion gear meshes with the third large gear mounted on the linkage shaft. 9 . The power assist device for assisting the elderly to walk according to claim 1 , wherein a seat cushion, a backrest, and an armrest are further installed on the base. 10 . 10 . The power assist device for assisting the elderly to walk according to claim 1 , wherein a plurality of rollers are also installed at the bottom end of the base, and the rollers are freely rotatably connected with the corresponding roller mounting seats, so the The roller mounting seat is universally connected with the base.

Images