CN215839999U - Multifunctional walking aid - Google Patents

Abstract

The utility model discloses a multifunctional walking aid in the technical field of walking aids, which comprises a frame body, a chair seat, a large wheel assembly, a small wheel, a backrest, a folding structure, a first rotating rod, a back lifting driving structure and second rotating rods, wherein two second rotating rods are detachably connected with a bent leg plate together, and the bent leg plate is driven by a bent leg driving assembly to turn over along the hinged part of the second rotating rod and the frame body. The utility model has the beneficial effects that: can be used for the elderly with disability and disability, and patients with incapability of self-care. A wheelchair product which has the function of enriching the posture change of a human body and is convenient for a user to live in daily life is designed and researched, the posture change meets the requirements of the user on the change of the normal body posture, and the wheelchair product has the basic functions of back lifting, leg bending, lifting and pressing type armrest design, convenience for space conversion between a bed and a wheelchair and the like.

Description

Multifunctional walking aid

Technical Field

The utility model relates to the technical field of walking aids, in particular to a multifunctional walking aid.

Background

According to statistics, by 2017, the aged population of China, 60 years old and older, exceeds 2.4 hundred million people, accounts for 17.3 percent of the total population, and continues to rise. According to prediction, the population of the aged Chinese will rise to 17.2% of the total population by 2020, about 2.5 billion people and the aged population above 65 will reach 1.67 billion. The degree of ageing in china has also remained at a high level for more than 80 years remaining in the 21 st century. According to survey results, about 4063 thousands of disabled and semi-disabled old people exist in China, and account for 18.3% of old people. Meanwhile, handicapped patients who are caused by various traffic accidents, diseases, natural disasters, or the like are also increasing year by year. The disabled people can bring great pressure to families and society, and the family has to ask nursing staff or undertake to nurse patients, so that great energy is still required while heavy economic burden is borne. In addition, from the existing endowment mode in China, the main trend is to home endowment, home endowment accounts for 90%, community endowment and institution endowment accounts for 7%, and hospital endowment accounts for 3%. On the other hand, nearly half of the old people in the old population of China belong to urban and rural empty-nest families or similar empty-nest families, and the proportion of the empty-nest old people in the old population of China is nearly 3 hundred million by 2030, wherein the proportion of the empty-nest old people in the old population reaches 90 percent, namely more than 2 hundred million empty-nest old people exist at the same time, and the situation of nursing problems of the disabled old people is more severe.

The physiological care of disabled old people is the core of nursing bed research, and mental care is a necessary prerequisite. The posture transformation function meets the requirement of the old on body posture transformation, reduces the generation of pressure sores, simultaneously relaxes the body, and consumes a great amount of energy and money of children in 24-hour accompanying. Many new functions of this wheelchair expand the living space of old man, make things convenient for the old man independently to remove, have a dinner with the family, bathe by oneself, carry out outdoor activities etc..

The pressure sores are caused by skin tissue ulceration and necrosis due to long-term compression of local tissues, are easily infected by bacteria, and about 50 percent of long-term bedridden old people do not die of the original disease but are caused by skin ulceration. For the old people lying in bed for a long time, the space is claustrophobic, psychological problems are easy to cause, and the direction to the life is lacked, so the research of the multifunctional wheelchair can help the old people lying in bed for a long time to expand the living space, solve some problems in life and improve the life quality of the old people.

To solve the above problems, we propose a multifunctional walker.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a multifunctional walking aid, and in order to solve the technical problem, the utility model provides the following technical scheme:

the utility model provides a multifunctional walking aid, which comprises a frame body and a seat arranged at the top of the frame body, wherein two large wheel assemblies are arranged on two opposite sides of one end of the frame body, each large wheel assembly comprises a large wheel rotatably connected to the frame body and a hand-push wheel coaxially and fixedly connected to the large wheel, small wheels used for assisting movement and provided with foot brakes are arranged on two opposite sides of the other end of the frame body, a backrest is arranged at one end of each small wheel, the two frame bodies are transversely folded through a folding structure, the seat is lapped on the two frame bodies, first rotating rods are horizontally hinged to two transverse sides of each frame body, the backrest is detachably connected to the two first rotating rods and is driven to turn over along the hinging part of the first rotating rod and the frame body by a back lifting driving structure, and second rotating rods are respectively hinged to one ends of the two frame bodies, which are far away from the backrest, two can dismantle jointly on the second dwang and be connected with bent leg board, bent leg board is driven its articulated department upset along second dwang and support body by bent leg drive assembly.

Preferably, the folding structure comprises a plurality of hinge plates hinged on opposite sides of two frame bodies, a movable plate is hinged between two adjacent hinge plates, and after the two adjacent hinge plates are turned over along the hinged position with the movable plate, the two frame bodies can be folded.

Preferably, a cushion with a depression is placed on the seat.

Preferably, two each vertical bar of wearing to be equipped with on the support body, the support body downside is equipped with the slot that supplies the bar lower extreme to insert, the lock groove that supplies two bar block, breach form is seted up respectively at the seat support both ends, through two the bar block is in the lock inslot, and then makes the horizontal spacing installation of seat support is on two support bodies, two the bar is through the spacing installation of first retaining structure in the slot.

Preferably, the back lifting driving structure comprises a first hinged support arranged on the frame body, a first hydraulic rod is hinged to the first hinged support, a first overturning seat is arranged on the first rotating rod and hinged to the first hydraulic rod, and a handrail is arranged at each of the upper ends of the two handrail rods.

Preferably, the leg bending driving structure comprises a second hinged support arranged on the frame body, a second hydraulic rod is hinged to the second hinged support, a second overturning seat is arranged on the second rotating rod, and the second overturning seat is hinged to the second hydraulic rod.

Preferably, first detent structure includes that the level wears to establish the first pin on the support body, set up a plurality of first jacks that supply first pin to penetrate the interior one end of support body and insert on the bar.

Preferably, the steamboat is installed on the lift post, offer on the support body and supply the lift post to insert the mounting groove that closes, and can slide from top to bottom, offer the second jack of a plurality of intercommunication mounting grooves on the support body, one of them wear to be equipped with the second pin on the second jack, offer the pinhole that supplies the second pin to insert on the lift post.

Compared with the prior art, the utility model has the beneficial effects that: can be used for the elderly with disability and disability, and patients with incapability of self-care. A wheelchair product which has the function of enriching the pose transformation of a human body and is convenient for a user to live in daily life is designed and researched, and the requirements on the wheelchair product are reflected in the following aspects.

(1) The pose transformation mainly meets the requirements of users on normal body posture change, and has the basic functions of back lifting, leg bending, pressure lifting handrail design, convenience for space conversion between a bed and a wheelchair and the like.

(2) Safety, which is the most important consideration in design, including mechanical safety and human safety, because the user is a person who cannot take care of himself.

Mechanical safety: the related mechanical structure meets the use requirements, the mechanical structure is safe and stable, the stability and the non-sudden change in various pose transformation processes are guaranteed, and the walking aid can walk safely in the walking aid process.

Human body safety: the excessive extrusion, collision and clamping injury to the body part of the human body are prevented in the in-place posture changing process, and the safety of the human body in the walking assisting process is ensured.

(3) Flexibility and differentiation meet the requirements of users with different body sizes and weights on the stress direction, size and contact area of body parts in the posture changing process, reduce the extrusion on the body parts and reduce the friction on the skin of the body and the secondary damage caused by the dislocation of the body parts.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an enlarged view of a portion of the structure at A in FIG. 1;

FIG. 3 is a schematic view of another angle of the three-dimensional structure of FIG. 1;

FIG. 4 is a schematic view of the stress on a section of a tension member at the time of material selection according to the present invention;

FIG. 5 is a schematic view showing torsional deformation of the rod member in the selection of materials according to the present invention;

FIG. 6 is a schematic view showing the deformation of the rod member during torsion in selecting a material according to the present invention;

FIG. 7a is a schematic view of the deformation of a rod during pure bending in the selection of materials according to the present invention;

FIG. 7b is a schematic diagram of the deformation of the rod member in transverse force bending during material selection according to the present invention;

figure 8 is a schematic view of the shear and bending moments of the main structural beam at the material selection of the present invention.

In the figure: 1-curved leg plate, 2-slot, 3-seat, 4-soft cushion, 5-recess, 6-backrest, 7-first turning seat, 8-first hydraulic rod, 9-armrest, 10-armrest rod, 11-first hinged support, 12-second inserting hole, 13-frame body, 14-small wheel, 15-big wheel component, 16-second hinged support, 17-second hydraulic rod, 18-second turning seat, 19-locking groove, 20-first inserting hole, 21-movable plate and 22-hinged plate.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Examples

As shown in figures 1-3, a multifunctional walking aid comprises a frame body 13 and a seat 3 arranged on the top of the frame body 13, wherein a soft cushion 4 with a concave part 5 is arranged on the seat 3, two big wheel assemblies 15 are arranged on two opposite sides of one end of the frame body 13, each big wheel assembly 15 comprises a big wheel which is rotatably connected to the frame body 13 and a hand-push wheel which is coaxially and fixedly connected to the big wheel, a small wheel 14 which is used for assisting movement and is provided with a foot brake is arranged on two opposite sides of the other end of the frame body 13, a small wheel 14 device with a brake is adopted, so that the multifunctional walking aid is safer and more reliable in the use of walking, parking, bathing and other functions, the small wheel 14 is arranged on a lifting column, an installation groove which is used for the insertion of the lifting column and can slide up and down is arranged on the frame body 13, a plurality of second insertion holes 12 which are communicated with the installation groove are arranged on the frame body 13, a second insertion hole 12 is penetrated by a second pin (not shown in the figure), the lifting column is provided with a pin hole for inserting the second pin, the second pin is inserted into different second insertion holes 12, the second pin is inserted into the pin hole, the vertical adjustment of the lifting column can be realized, and the height adjustment of the seat support 3 can be adjusted, one end of the support body 13 corresponding to the small wheel 14 is provided with a backrest 6, the support body 13 is provided with two support bodies 13, the two support bodies 13 are transversely folded through a folding structure, the folding structure comprises a plurality of hinge plates 22 hinged on the opposite sides of the two support bodies 13, a movable plate 21 is hinged between every two adjacent hinge plates 22, after the two adjacent hinge plates 22 are overturned along the hinged part with the movable plate 21, the two support bodies 13 can be folded, the seat support 3 is lapped on the two support bodies 13, the two support bodies 13 are respectively and vertically provided with the grab bars 10 in a penetrating way, the lower side of the support body 13 is provided with a slot 2 for inserting the lower ends of the grab bars 10, and two ends of the seat support 3 are respectively provided with a slot for clamping the grab bars 10, A locking groove 19 in the form of a notch, wherein two handrail rods 10 are clamped in the locking groove 19, so that the chair seat 3 is transversely and limitedly arranged on two frame bodies 13, the two handrail rods 10 are limitedly arranged in the slot 2 through a first locking structure, the first locking structure comprises a first pin (not shown in the figure) horizontally penetrating through the frame bodies 13, a plurality of first inserting holes 20 for inserting one ends of the first pins into the frame bodies 13 are arranged on the handrail rods 10, a handrail 9 is respectively arranged at the upper ends of the two handrail rods 10, the first pin is inserted into different first inserting holes 20 on the handrail rods 10, so that old people and disabled people losing mobility are easier to save labor and facilitate in the moving process of the bed and the wheelchair, first rotating rods are respectively and horizontally hinged at the two transverse sides of the two frame bodies 13, a backrest 6 is detachably connected to the two first rotating rods, and is driven to turn along the hinged positions of the first rotating rods and the frame bodies 13 by a backrest driving structure, the backrest can change the body posture of the old under the pushing of the back lifting driving structure, the back lifting driving structure comprises a first hinged support 11 arranged on a frame body 13, a first hydraulic rod 8 is hinged on the first hinged support 11, a first overturning seat 7 is arranged on a first rotating rod, the first overturning seat 7 is hinged with the first hydraulic rod 8, when the angle of the backrest is adjusted, the first hydraulic rod 8 is started at first, the first hydraulic rod 8 stretches and retracts to drive the first rotating rod to overturn along the hinged part with the frame body 13, so as to realize the angle adjustment of the backrest, one ends of the two frame bodies 13 far away from the backrest 6 are respectively hinged with a second rotating rod, a leg bending plate 1 is detachably connected on the two second rotating rods together, the leg bending plate 1 is driven by a leg bending driving component to overturn along the hinged part of the second rotating rod and the frame body 13, the leg bending driving structure comprises a second hinged support 16 arranged on the frame body 13, and a second hydraulic rod 17 is hinged on the second hinged support 16, the second turning seat 18 is arranged on the second rotating rod, the second turning seat 18 is hinged to the second hydraulic rod 17, when the angle of the leg bending plate 1 is adjusted, the second hydraulic rod 17 is started at first, the second hydraulic rod 17 stretches and retracts to drive the second rotating rod to turn along the hinged position with the frame body 13, so that the angle adjustment of the leg bending plate 1 is realized, the back lifting posture change is according to the existing ergonomic research, the angle of the spine in the best comfortable state is 65 degrees, the best angle during reading is 76-79 degrees, the best angle for rest is 53 degrees, and the design is adjustable in 0-80 degrees and can be stopped at any angle. The leg lifting angle meets the requirement of sitting posture because of the requirement of stool and urine treatment, and the design angle of the shank plate is 0-90 degrees. The design angle of the hip plate is 0-30 degrees, and the zero-gravity pose transformation and bed-chair separation functions are met. The turning function is designed to be 0-90 degrees, the turning is divided into two stages, the first stage is turned by 0-30 degrees integrally, the second stage is 30-90 degrees, and a wheelchair (a walking aid) is a functional part for expanding living space and bearing users; the frame body is a hinged part of a main pose changing power mechanism and plays the roles of integrally ascending and descending, hip lifting, left and right 90-degree integral overturning, back lifting and leg bending.

Material selection and mechanical analysis of wheelchair (walking aid)

Selection of materials for folding wheelchairs (walking aids) according to the theory of strength

A straight rod with an equal cross section is taken, two transverse lines ab and cd perpendicular to a rod shaft are drawn on the surface of the straight rod, and two longitudinal lines parallel to the rod shaft are drawn between the two transverse lines. Then a pair of axial tension is applied to the two ends of the rod, so that the rod piece generates tensile deformation. From the rod surface it can be observed: ab and cd are translated linearly to the a1b1 and c1d1 positions, respectively, and are still linear and perpendicular to the rod axis; the two longitudinal lines are elongated by equal amounts and still parallel to the rod axis. From the observed surface phenomena, a plane assumption can be made: a planar cross-section before deformation, and a plane after deformation, but with translation along the axis, as shown in fig. 4: from the planar assumption, the elongation (or contraction) of each longitudinal line between any two cross-sections is the same. From the assumption of uniform continuity of the material, it is known that the internal forces are uniformly distributed over the cross-section, i.e. the stresses at each point are equal.

If the area of the cross section of the rod is A and the axial force on the cross section is N, the normal stress on the cross section is

σ＝N/A

(the sign of sigma is the same as the axial force, and when N is positive, sigma is also positive, called tensile stress, and when N is negative, sigma is also negative, called compressive stress.)

From the above, the stress that the material of the rod can bear is limited, and to ensure the normal operation of the rod, the working stress of the rod must not exceed the allowable stress of the material, so the strength condition of the rod under tension or compression is

In the formula [ sigma ]]Indicating permissible stress of the material of the rod, MP_a。

The main structure of the wheelchair of the design adopts a pipe with the diameter of 2CM and the sectional area

Assuming a weight of 200kg is passed

At present, most of wheelchair materials in the market use hard aluminum alloy pipes, and the maximum tensile strength of the hard aluminum alloy pipes is 370MP_aI.e. maximum allowable stress [ sigma ]]Is 370MP_aAnd the calculated result is far less than the maximum allowable stress, so that the main structure of the wheelchair adopts hard aluminum alloy.

Selecting materials of folding wheelchair according to rigidity theory

The rigidity conditions when the circular shaft is twisted are as follows: maximum unit length torsion angle theta of circular shaft_maxNot exceeding allowable unit length torsion angle [ theta ]]I.e. by

Or

The stiffness conditions when the beam is bent are: when the beam is bent and deformed, the deflection and the corner of a specified section are not allowed to exceed allowable values, namely y_max≤[y]Or theta_max≤[θ]

Wherein [ y ] and [ theta ] are allowable deflection and allowable rotation angle, respectively.

Calculation of torsional stiffness

If an external force couple Me is applied to each end of the straight rod, as shown in FIG. 5, and the two are equal in size and opposite in direction, and the application surfaces are perpendicular to the axis of the rod, the cross section of the rod will rotate relatively around the axis, and this deformation is called torsion;

as shown in fig. 6, the deformation characteristics are as follows: any two cross sections of the rod part rotate relatively around the axis of the rod, and the relative angular displacement between the two cross sections is called a torsion angle

It is shown that,

the torsion angle of section B relative to section a is shown. The longitudinal line of the rod slightly inclines during twisting, and the inclination angle of the surface longitudinal line is represented by gamma;

the allowable torsion angle per unit length [ theta ] of the hard aluminum alloy pipe used is known]1(°)/m, shear modulus G8 × 10⁴MP _aAnd also

According to the above formula, obtain

Therefore, the stiffness of the duralumin alloy pipe is sufficient.

Flexural stiffness calculation

As shown in fig. 7a to 7b, if the straight rod is acted on by an external couple Me at each end, and the two couples are equal in size and opposite in direction, the action surfaces are coincident with a certain longitudinal plane containing the rod axis, or are acted on by an external force F which is in the longitudinal plane and perpendicular to the rod axis, the axis of the rod member is bent, the deformation is called bending, fig. 7a shows pure bending, and fig. 7b shows transverse force bending.

As shown in figure 8, the bending rigidity of the main structural beam of the wheelchair of the present design is described below.

Drawing a shear diagram and a bending moment diagram of the main structure supporting beam, analyzing the final structure shear diagram and the bending moment diagram, wherein the allowable deflection of the beam during bending is [ y ], and the maximum deflection of the selected material is only required to be not more than the allowable deflection,

(in the formula I)_ZMoment of inertia of cross section, mm⁴，W_ZFlexural section modulus, mm³)

And because the adopted material is a hollow aluminum alloy pipe, the pipe has the sectional inertia moment of the pipe

And bending-resistant section model

According to the rigidity condition in bending

Through experiments and analysis, the hard aluminum alloy adopted by the wheelchair of the design completely meets the conditions, and the rigidity is enough, so that the main structural material of the wheelchair meets the requirements by adopting the hard aluminum alloy.

The elderly are the most traditional group of people in consumption concept, and related researches show that a product with multiple purposes is favored by the elderly. The multifunctional walking aid has the advantages that the multifunctional walking aid meets the special consumption concept of the special group well, the practical situation of the old people is also considered, the old people live in a multidirectional mode, the walking aid has multiple functions, and the requirements of the old people on going out, exercising, safety, living and the like can be met simultaneously. In addition, it has personalized customized services. With such a plurality of advantages, the novel intelligent multifunctional walking aid must become the gospel of the old, and the potential market value and development value thereof cannot be ignored.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a multifunctional walking aid, includes support body (13) and installs seat support (3) at support body (13) top, the relative both sides of support body (13) one end are equipped with two bull wheel subassemblies (15), bull wheel subassembly (15) are including rotating bull wheel and the hand push wheel of coaxial rigid coupling on the bull wheel of connecting on support body (13), the relative both sides of the other one end of support body (13) are equipped with steamboat (14) that are used for supplementary removal, and have the service brake, and it corresponds the one end of steamboat (14) is equipped with back (6), its characterized in that: support body (13) are equipped with two, and two support body (13) realize transversely folding through beta structure, seat support (3) overlap joint is on two support bodies (13), two each level of horizontal both sides on support body (13) articulates there is first dwang, back (6) can be dismantled and connect on two first dwang, and by lifting back drive structure drive its edge the upset of articulated department of first dwang and support body (13), two the one end that back (6) were kept away from in support body (13) respectively articulates there is the second dwang, two can dismantle jointly on the second dwang and be connected with bent leg board (1), bent leg board (1) is driven its upset along the articulated department of second dwang and support body (13) by bent leg drive assembly.

2. A multi-functional walker according to claim 1 wherein: the folding structure comprises a plurality of hinge plates (22) hinged to the opposite sides of two frame bodies (13), a movable plate (21) is hinged between every two adjacent hinge plates (22), and the two frame bodies (13) can be folded after the two adjacent hinge plates (22) are turned over along the hinged position of the movable plate (21).

3. A multi-functional walker according to claim 1 wherein: a soft pad (4) with a concave part (5) is arranged on the chair seat (3).

4. A multi-functional walker according to claim 1 wherein: two each vertical handrail pole (10) of wearing to be equipped with on support body (13), support body (13) downside is equipped with slot (2) that supply handrail pole (10) lower extreme to insert to close, seat support (3) both ends are seted up locking groove (19) that supply two handrail pole (10) blocks, breach form respectively, through two handrail pole (10) block is in locking groove (19), and then makes horizontal spacing the installation on two support bodies (13) of seat support (3), two handrail pole (10) are spacing to be installed in slot (2) through first locking structure, two handrail pole (10) upper end respectively is equipped with a handrail (9).

5. A multi-functional walker according to claim 4 wherein: first locking structure wears to establish the first pin on support body (13) including the level, set up a plurality of first jacks (20) that supply first pin to penetrate support body (13) interior one end to insert on handrail pole (10).

6. A multi-functional walker according to claim 1 wherein: the back lifting driving structure comprises a first hinged support (11) arranged on a support body (13), a first hydraulic rod (8) is hinged to the first hinged support (11), a first overturning seat (7) is arranged on the first rotating rod, and the first overturning seat (7) is hinged to the first hydraulic rod (8).

7. A multi-functional walker according to claim 1 wherein: the leg bending driving structure comprises a second hinged support (16) arranged on the frame body (13), a second hydraulic rod (17) is hinged to the second hinged support (16), a second turning seat (18) is arranged on the second rotating rod, and the second turning seat (18) is hinged to the second hydraulic rod (17).

8. A multi-functional walker according to claim 1 wherein: install on the lift post steamboat (14), offer on support body (13) and supply the lift post to insert gliding mounting groove about and, offer second jack (12) of a plurality of intercommunication mounting grooves on support body (13), one of them wear to be equipped with the second pin on second jack (12), set up the pinhole that supplies the second pin to insert on the lift post.

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