CN211843458U

CN211843458U - Walking stick

Info

Publication number: CN211843458U
Application number: CN202020250252.0U
Authority: CN
Inventors: 李道学
Original assignee: Guangdong Yushun New Material Technology Co ltd
Current assignee: Foshan Shunde Yushun New Material Technology Co ltd
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2020-11-03
Anticipated expiration: 2030-03-04

Abstract

The utility model provides a walking stick, including the bracing piece: the bracing piece is hollow tubular structure, and tubular structure's pipe wall comprises the lamellar structure of complex layer, and the lamellar structure includes that at least three-layer carbon fiber layer and at least two-layer PMI membrane roll up the complex and form, and the inboard and the outside of every layer of PMI membrane are the carbon fiber layer, and the stratum basale and the skin layer of pipe wall are the carbon fiber layer. In the pipe wall of bracing piece, the PMI membrane that has excellent mechanical properties plays the effect of bearing, reinforcement to the carbon fiber layer, makes the bracing piece have high tensile resistance, resistance to compression, specific stiffness, specific strength and corrosion resisting property, makes the walking stick that adopts above-mentioned bracing piece as main supporting mechanism have higher intensity and toughness, difficult rupture, can bear great pressure. On the other hand, the supporting rod is of a hollow tubular structure, so that the production materials of the crutch can be saved, the crutch can keep light and handy, and the crutch is convenient for a user to use flexibly.

Description

Walking stick

Technical Field

The utility model belongs to the field of auxiliary devices, in particular to a crutch.

Background

The crutch is used as a common auxiliary rehabilitation appliance and is a travel partner for a plurality of old people and leg disease patients. Most of traditional crutch products are products made of wood, steel, aluminum and other alloys, however, the above materials generally have the defects of poor corrosion resistance, heavy weight, high manufacturing cost, poor strength, easy deformation and the like.

The carbon fiber is a special fiber consisting of carbon elements and has the characteristics of high temperature resistance, friction resistance, electric conduction, heat conduction, corrosion resistance and the like. The carbon fiber is fibrous and soft, and may be produced into various kinds of fabric, and has graphite microcrystal structure with preferred orientation along fiber axis and thus high strength and modulus along fiber axis direction. The carbon fibers have a low density and thus a high specific strength and a high specific modulus. In the prior art, the main purpose of carbon fiber is to compound carbon fiber with foam, resin, metal, ceramic, carbon and the like as a reinforcing material to manufacture advanced composite materials.

Polymethacrylimide foam (PMI) is a cross-linked foam with a uniform pore size distribution, excellent structural stability and high mechanical strength. PMI has higher specific strength, specific modulus, heat and humidity resistance, and better high temperature creep resistance and dimensional stability than other polymer foam materials. PMI is the foam material with the highest specific strength (strength/density) and specific modulus (modulus/density) in the world at present, has excellent high-temperature resistance and dimensional stability, and is an ideal core material for manufacturing the light-weight high-strength composite material pipe wall. In addition, because the PMI has high closed pore rate, uniform pore size distribution and low moisture absorption rate, the sandwich composite material as the core material has durability and environmental resistance which are far superior to those of a honeycomb composite material.

SUMMERY OF THE UTILITY MODEL

The utility model provides a crutch to provide reliable support or walking assistance for crutch users.

According to an aspect of the utility model, a walking stick is provided, including the bracing piece: the bracing piece is hollow tubular structure, and tubular structure's pipe wall comprises the lamellar structure of complex layer, and the lamellar structure includes that at least three-layer carbon fiber layer and at least two-layer PMI membrane roll up the complex and form, and the inboard and the outside of every layer of PMI membrane are the carbon fiber layer, and the stratum basale and the skin layer of pipe wall are the carbon fiber layer.

In the pipe wall of bracing piece, PMI membrane and the compound multilayer sandwich structure that forms of carbon fiber layer, the PMI membrane that has excellent mechanical properties plays the bearing to the carbon fiber layer, the effect of reinforcement, it has high tensile resistance to make the bracing piece, the pressure resistance, specific rigidity, specific strength and corrosion resisting property, make the walking stick that adopts above-mentioned bracing piece as main supporting mechanism have higher intensity and toughness, difficult rupture, can bear great pressure, provide reliable support and auxiliary action for the user, reduce the walking stick from this and fracture and lead to the injured possibility of user in the use, make the walking stick have higher security. On the other hand, the supporting rod is of a hollow tubular structure, so that the production materials of the crutch can be saved, the crutch can keep light and handy, and the crutch is convenient for a user to use flexibly.

Preferably, the PMI film is made of 100% PMI.

Preferably, the thickness of the PMI film does not exceed 1 mm.

The PMI film with the thickness not more than 1mm has certain crimpability at normal temperature, and the PMI film is used as a core layer material for preparing the supporting rod, so that the PMI film can be directly compounded on the outer side of the base material along the contour of the base material, and the supporting rod of the crutch can be conveniently manufactured in batches. In addition, compared with the compounding between thick plates, the compounding of the thin layers has larger interlayer binding force, the interlayer binding is tighter, the delamination is not easy, and the integration and the mechanical property of the supporting rod are improved. In the pipe wall of bracing piece, the thickness of every layer of PMI membrane accounts for than less, consequently, can adopt the compound form of multilayer PMI membrane to make the bracing piece have bigger mechanical strength, simultaneously, can not make the external diameter of bracing piece obviously increase, can make the size of the external diameter adaptation human hand type of bracing piece, reach more comfortable use and experience.

Preferably, the PMI film is directly coated on the periphery of the carbon fiber layer on the inner side of the PMI film.

Preferably, the PMI film is spirally wound around the outer periphery of the carbon fiber layer on the inner side thereof.

Preferably, the grain of the carbon fiber layer is spiral.

The material for constructing the layered structure forms the layered structure in a spiral winding mode, can be suitable for the manufacturing requirements of different special-shaped supporting rods, such as the shapes of the supporting rods with concave or convex surfaces and bent positions, and all the layered structures forming the tube wall can be tightly compounded with each other without dead angles or gaps.

Preferably, the lines of the adjacent two layers of the layered structure are mutually crossed. Therefore, adjacent layered structures jointly form a staggered net-shaped structure, the stress of the net-shaped structure is uniform, and the pressure resistance of the supporting rod can be improved.

Preferably, the support rod includes a support part and an armrest part, the support part is vertical, the surface of the armrest part is recessed to form a grip structure, and the end of the support part is connected with the end of the armrest part.

Preferably, the support part and the armrest part are integrally formed and connected in a bent manner.

The user holds the type structure of holding of handrail portion, can imbed the type structure of holding with the hand correspondence, makes palm and the abundant contact of handle section, and both the messenger's power of being convenient for can play the antiskid again, can also make the more comfortable sense of touch of user experience. The supporting part and the armrest part are integrally formed, so that stress concentration caused by forming a gap at the joint of the supporting part and the armrest part is avoided, the joint of the supporting part and the armrest part has higher mechanical strength, and the supporting part and the armrest part are not easy to break.

Preferably, the device also comprises a base, wherein the base comprises a multi-way joint and base supporting legs; the materials of the multi-way joint and the supporting legs are all PMI-carbon fiber composite materials, the PMI-carbon fiber composite materials are composed of a plurality of layers of laminated structures, each laminated structure comprises at least three carbon fiber layers and at least two layers of PMI films, the laminated structures are formed by coiling and compounding, the inner side and the outer side of each layer of PMI film are carbon fiber layers, and the substrate layer and the skin layer of the PMI-carbon fiber composite materials are carbon fiber layers; the multi-way joint comprises at least four mutually communicated passages; the base supporting legs are of a hollow tubular structure, and the number of the base supporting legs is not less than three; the base supporting feet and the supporting rod are inserted in the passages of the multi-way joint. The base supporting rod comprising the plurality of base supporting legs is used, so that the crutch and the ground have a plurality of stress points, the stress is uniform, the crutch is not easy to slip, and a more reliable supporting effect can be achieved. In addition, as mentioned above, the base is made of the PMI-carbon fiber composite material, so that the base has high tensile strength, pressure resistance, specific rigidity, specific strength and corrosion resistance, and can stably support the supporting rod.

Drawings

FIG. 1 is a layered structure diagram of a support bar, a cross five-way joint and a base support leg;

FIG. 2 is a perspective view of a foot of the base;

FIG. 3 is a perspective view of a cross five-way joint;

FIG. 4 is a perspective view of the crutch of embodiment 1 in one aspect;

fig. 5 is a perspective view of the crutch of embodiment 1 in another visual sense.

The correspondence of each reference numeral in the above figure is as follows: the anti-skid rubber mat comprises a PMI film layer, 2 carbon fiber layers, 3 supporting parts, 4 armrest parts, 5 a base, 51 base supporting feet, 52 a cross-shaped five-way joint and 6 an anti-skid rubber mat.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, back, horizontal, vertical … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly. In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Example 1

The crutch of the embodiment comprises a supporting rod, a base 5 and an antiskid rubber mat 6, wherein the supporting rod comprises a supporting part 3 and an armrest part 4, the base 5 comprises a cross five-way joint 52 and a base supporting leg 51, and the supporting rod and the base 5 are both made of PMI-carbon fiber composite materials.

1. Making support rods

S1, a cylindrical mold with a smooth surface and a special-shaped rod-shaped mold with a surface sunken to form a holding structure suitable for a human hand shape are adopted, the cylindrical mold and the special-shaped rod-shaped mold are arranged in a bent mode, an assembled mold formed by assembling the cylindrical mold and the special-shaped rod-shaped mold serves as a tube core mold, in the tube core mold, a supporting portion 3 of a supporting rod is formed by the cylindrical mold, and an armrest portion 4 of the supporting rod is formed by the special-shaped rod-shaped mold;

s2, coating a release agent on the surface of the tube core mould, attaching the release agent to the surface of the tube core mould, and winding the tube core mould by using carbon fibers to construct a first carbon fiber layer 2 serving as a substrate layer of the tube wall;

s3. extension of sandwich structure

S3.1, coating resin on the surface of the carbon fiber layer 2 serving as a substrate layer, and winding the carbon fiber layer on the periphery of the substrate layer to construct 2 carbon fiber layers 2 on the periphery of the substrate layer;

s3.2, coating resin on the surface of the outermost carbon fiber layer 2 of the semi-finished product prepared in the previous step, adhering and winding a PMI film on the periphery of the carbon fiber layer 2, and constructing 1 PMI film layer 1 on the periphery of the outermost carbon fiber layer 2 of the semi-finished product, wherein the formed PMI film layer 1 has spiral lines;

s3.3, coating resin on the surface of the outermost PMI film layer 1 of the semi-finished product prepared in the previous step, and adhering and winding carbon fibers on the periphery of the PMI film layer 1, so that 1 carbon fiber layer 2 is built on the periphery of the semi-finished product;

s3.4 repeating S3.2-S3.3 three times;

s4, coating resin on the surface of the outermost carbon fiber layer 2 of the semi-finished product prepared in the previous step, attaching carbon fibers and winding the carbon fibers on the periphery of the semi-finished product, and thus constructing 1 carbon fiber layer 2 on the periphery of the semi-finished product to serve as a skin layer of a pipe wall;

s5, ultraviolet irradiation is carried out to enable the resin adhered with each layered structure to be crosslinked and cured, so that the tube wall is shaped, and in some embodiments, the resin can be crosslinked and cured in a heating mode;

and S6, removing the tube core mould to obtain the support rod formed by compounding the PMI film and the carbon fibers.

In the method, the angle formed by the lines of the two adjacent layers of the layered structures is 45 degrees, and the thickness of the PMI film is not more than 1 mm. The support rod thus produced is a hollow bent tubular structure, the layered structure of the wall of which is shown in fig. 1. As shown in fig. 4 and 5, the support rod includes a support portion 3 and a handrail portion 4 that are integrally formed and connected in a bending manner, wherein the support portion 3 is a cylindrical tubular structure with a smooth surface, and the handrail portion 4 is a special-shaped tubular structure with a recessed surface to form a grip-type structure.

2. Making the base supporting feet 51

S1, adopting an arc rod-shaped mold with a circular cross section as a tube core mold, coating a release agent on the surface of the tube core mold, attaching the surface of the tube core mold, and winding the tube core mold by using carbon fibers to construct a first carbon fiber layer 2 as a substrate layer of a tube wall;

s2. extension of sandwich structure

S2.1, coating resin on the surface of a carbon fiber layer 2 serving as a substrate layer, and winding the carbon fiber layer on the periphery of the substrate layer to construct 2 carbon fiber layers 2 on the periphery of the substrate layer;

s2.2, coating resin on the surface of the outermost carbon fiber layer 2 of the semi-finished product prepared in the previous step, adhering and winding a PMI film on the periphery of the carbon fiber layer 2, and constructing 1 PMI film layer 1 on the periphery of the outermost carbon fiber layer 2 of the semi-finished product, wherein the formed PMI film layer 1 has spiral lines;

s2.3, coating resin on the surface of the outermost PMI film layer 1 of the semi-finished product prepared in the previous step, and adhering and winding carbon fibers on the periphery of the PMI film layer 1, so that 1 carbon fiber layer 2 is built on the periphery of the semi-finished product;

s2.4 repeating S2.2-S2.3 three times;

s3, coating resin on the surface of the outermost carbon fiber layer 2 of the semi-finished product prepared in the previous step, attaching carbon fibers and winding the carbon fibers on the periphery of the semi-finished product, and thus constructing 1 carbon fiber layer 2 on the periphery of the semi-finished product to serve as a skin layer of a pipe wall;

s4, ultraviolet irradiation is carried out to enable the resin adhered with each layered structure to be crosslinked and cured, so that the tube wall is shaped, and in some embodiments, the resin can be crosslinked and cured in a heating mode;

and S5, removing the tube core die to obtain the base supporting leg 51 formed by compounding the PMI film and the carbon fiber.

In the method, the angle formed by the lines of the two adjacent layers of the layered structures is 45 degrees, and the thickness of the PMI film is not more than 1 mm. As shown in fig. 2, the base support foot 51 thus obtained is a hollow arc-shaped tubular structure (the pipe with the center of gravity outside the pipe body and without the bent structure can be referred to as an arc-shaped tubular structure), and the layered structure of the pipe wall is shown in fig. 1. Four base supporting feet 51 with the same specification are manufactured according to the method.

3. Making a cross five-way joint 52

S1, adopting five vertical rod-shaped molds, vertically arranging one rod-shaped mold, and respectively arranging another four rod-shaped molds at the tail ends of the five vertical rod-shaped molds, wherein the four rod-shaped molds are distributed on the periphery of the vertically arranged rod-shaped molds in a cross manner, in the combined mold formed by the above steps, the adjacent rod-shaped molds are mutually vertical, and the combined mold formed by the above steps is used as a tube core mold, wherein a passage for inserting the supporting rod is formed by the vertically arranged rod-shaped molds, and a passage for inserting the base supporting foot 51 is formed by the four rod-shaped molds distributed in a cross manner;

s3. extension of sandwich structure

s3.4 repeating S3.2-S3.3 three times;

s6, removing the tube core die to obtain the cross five-way connector 52 formed by compounding the PMI film and the carbon fibers.

In the method, the angle formed by the lines of the two adjacent layers of the layered structures is 45 degrees, and the thickness of the PMI film is not more than 1 mm. As shown in fig. 3, the cross five-way joint 52 is an integrally formed bent pipe network structure, and has a hollow inner cavity and five passages with hollow tubular structures, and the pipe walls of the passages have a layered structure as shown in fig. 1. Five passages are communicated with the hollow inner cavity and the external space of the cross-shaped five-way joint 52, the adjacent passages are mutually vertical, and the four passages for the base supporting feet 51 to be inserted are distributed on the periphery of the passage for the supporting rods to be inserted in a cross shape.

4. Assembled walking stick

Firstly, four base supporting feet 51 are respectively inserted into the four passages of the cross five-way joint 52 for the base supporting feet 51 to be inserted into, so that the assembly of the base 5 is completed, then an anti-skid rubber pad 6 is sleeved on the end part of each base supporting foot 51 which is not connected with the cross five-way joint 52, finally, the supporting rod is inserted into the passage of the cross five-way joint 52 for the supporting rod to be inserted into, so that the supporting part 3 of the supporting rod is connected with the cross five-way joint 52, and the assembly is completed as shown in fig. 4 and 5.

In practical applications, the number of layers of the layered structures of the tube wall constituting the support rod, the outer wall of the cross five-way joint 52, and the outer wall of the base support leg 51, and the thickness of each layered structure may be adjusted as necessary within an appropriate range.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will understand that the present invention can be modified or replaced with other embodiments without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a crutch, includes the bracing piece, its characterized in that: the support rod is of a hollow tubular structure, the pipe wall of the tubular structure is composed of a plurality of layers of laminated structures, each laminated structure comprises at least three carbon fiber layers and at least two layers of PMI films, the carbon fiber layers are wound and compounded on the inner sides and the outer sides of the PMI films, and the basal layer and the skin layer of the pipe wall are the carbon fiber layers.

2. The crutch of claim 1, further comprising: the PMI film was made of 100% PMI.

3. The crutch of claim 2, further comprising: the thickness of the PMI film is not more than 1 mm.

4. The crutch of claim 3, further comprising: the PMI film is directly coated on the periphery of the carbon fiber layer at the inner side of the PMI film.

5. The crutch of claim 3, further comprising: the PMI film is spirally wound around the outer periphery of the carbon fiber layer on the inner side thereof.

6. The crutch of claim 5, further comprising: the lines of the carbon fiber layer are spiral.

7. The crutch of claim 6, further comprising: the lines of the adjacent two layers of the layered structures are mutually crossed.

8. The crutch of any of claims 1 to 7, further comprising: the bracing piece includes supporting part and handrail portion, the supporting part is vertical form, the surface depression of handrail portion forms and holds the type structure, the tip of supporting part with the end connection of handrail portion.

9. The crutch of claim 8, further comprising: the supporting part and the armrest part are integrally formed and are connected in a bending mode.

10. The crutch of any of claims 1 to 7, further comprising:

the base comprises a multi-way joint and base supporting legs;

the multi-way joint and the supporting legs are made of PMI-carbon fiber composite materials, the PMI-carbon fiber composite materials are composed of a plurality of layers of laminated structures, each laminated structure comprises at least three carbon fiber layers and at least two layers of PMI films, the carbon fiber layers are arranged on the inner sides and the outer sides of the PMI films, and the base layer and the skin layer of the PMI-carbon fiber composite materials are the carbon fiber layers;

the multi-way joint comprises at least four mutually communicated passages;

the base supporting legs are of a hollow tubular structure, and the number of the base supporting legs is not less than three;

the base supporting legs and the supporting rods are all inserted in the passages of the multi-way joints.