CN110575368B

CN110575368B - Walking auxiliary device and preparation process thereof

Info

Publication number: CN110575368B
Application number: CN201910940238.5A
Authority: CN
Inventors: 秦柳; 陶广庆; 马文良; 刘伟; 梁宇光
Original assignee: Ningbo Gmf Technology Co ltd
Current assignee: Ningbo Gmf Technology Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2024-04-26
Anticipated expiration: 2039-09-30
Also published as: CN110575368A

Abstract

The invention discloses a walking auxiliary device, which comprises a protective sleeve, wherein an embedded bag is arranged in the middle of the protective sleeve, at least the bottom side of the embedded bag is provided with a closed end, an inner panel material is arranged in the embedded bag, the embedded panel material is an elastic panel material made of foaming materials, the protective sleeve is unfolded to two sides to form extension parts, and the edge of each extension part is connected with a binding belt. The invention also discloses a preparation process of the walking aid device, wherein the inner panel material is formed by granulating, foaming and compression molding and is arranged in a protective sleeve to form the device. The whole preparation process of the walking aid device is environment-friendly and pollution-free, and the prepared microporous foam material has the characteristics of low density, high rebound resilience, strong mechanical property, good comfort, silence and the like, so that the problems of poor rebound resilience, low comfort, large sound and the like of the traditional walking aid device can be solved, and the microporous foam material can be widely applied to the field of body building and protection of human bodies.

Description

Walking auxiliary device and preparation process thereof

Technical Field

The invention relates to the field of body-building protective articles, in particular to a multi-layer forming die and a foaming material multi-layer forming process using the same.

Background

Once a person takes a certain age, each function of the body is weakened, the person can take 20 to 30 minutes to walk in a very young time, particularly, the person can climb stairs and can asthma the atmosphere when the person cannot climb 3 floors, so a walking auxiliary device is developed on the market aiming at the phenomenon, the person can walk like a young person, and the old person can walk like a fly without feeling tired. But the embedded material of traditional walking auxiliary device is hard plastics, and the human muscle of striking is hit when walking, and is less comfortable, and striking simultaneously produces very big sound, and for this reason people seek always with research a novel device that can improve material travelling comfort, resilience, portability, reduce sound.

In view of the advantages of ultra-light density, ultra-high resilience, wear resistance, folding resistance, and low temperature properties of microcellular foam particles, such as thermoplastic polyurethane microcellular foam particles, the present invention attempts to use them in walking aid devices to enhance some properties of the walking aid device, such as comfort, silence, and impart high rebound characteristics thereto.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present invention aims to solve the problems of poor comfort and noise when the walking aid is worn.

In order to achieve the above object, the present invention provides a walking aid, comprising a protective sleeve, wherein an embedded bag is provided in the middle of the protective sleeve, the embedded bag has a closed end at least at the bottom side, an embedded panel material is installed in the embedded bag, the embedded panel material is an elastic panel material made of foaming material, the protective sleeve is unfolded to two sides to form extension parts, and a binding belt is connected to the edge of each extension part. When the walking assisting device is used, the inner panel material is fixedly arranged in the embedded bag, the closed end prevents the inner panel material from falling out of the embedded bag, the protective sleeve is worn at the rear part of the knee and is aligned with the knee in the middle, the extending parts at the two sides are wound to the front sides of the legs along the knee and are then tightly bound by the binding bands, and when walking, the elastic force of the inner panel material provides restoring force for the bent knee to help the legs to restore the upright posture, so that the walking is more labor-saving.

Further, the extension part is provided with two pairs and is respectively arranged on the upper side and the lower side of the protective sleeve. Therefore, the upper side and the lower side of the knee can be respectively fastened when the utility model is worn, so that the wearing stability is improved, and slipping or falling-off is prevented.

Further, the end of the binding band is provided with a magic tape. The magic tape is sewn or stuck to the end parts of the binding bands on two sides through the adhesive, and the magic tapes on two sides can be conveniently lapped together, so that the convenience of use is improved.

Further, the embedded bags on the protective sleeve are arranged one above the other and are provided with a certain interval to form two containing spaces, and two ends of the plate material are respectively embedded in the upper embedded bag and the lower embedded bag through the openings of the upper embedded bag and the lower embedded bag; preferably, the openings of the two embedded bags are arranged in the middle of the protective sleeve, and the bottoms at the two ends are closed. During installation, the strip-shaped plates are inserted from the opening of the embedded bag in the middle of the protective sleeve and propped against the bottom of the embedded bag, and the distance between the bottoms of the embedded bags at two ends is generally similar or the same to the length of the embedded plates.

Further, both ends of the embedded plate are provided with round chamfers. The edge of the embedded plate is rounded, so that friction with a human body during wearing can be reduced, and comfort level is improved.

Further, the embedded plate can be elastically bent, one side surface of the embedded plate faces the wearing surface of the knee, the other side surface of the embedded plate is a supporting surface for providing resilience, and the embedded plate is folded towards the supporting surface side when being bent.

In one embodiment of the invention, the central portion of the inner panel is curved to form an arcuate surface, the direction of curvature of the wear surface being in cooperation with the knee. The embedded plate with the arc-shaped surface has better strength and higher fitting degree to the wearing surface.

In another embodiment of the invention, the support surface of the inner panel is provided with a plurality of reinforcing ribs, the length direction of the reinforcing ribs being parallel to the length direction of the inner panel. The reinforcing rib can be connected with the surface of the supporting surface in a sewing or bonding mode, the elasticity and toughness of the embedded plate are improved, after the embedded plate is worn, the inner panel is bent along the length direction for a long time along with the bending and stretching movement of the knee, so that the fatigue influence strength is likely to be caused, the elasticity is reduced, the strength of the embedded plate can be maintained by the reinforcing rib, and the service life is prolonged.

In another embodiment of the invention, the middle part of the supporting surface of the inner panel is fixedly connected with an elastic lug which is made of foaming material. The elastic lug is arranged as an elastic cylinder, the elastic cylinder is made of foaming materials, when the inner panel material with the structure is assembled, the elastic cylinder faces away from the knee, and the elastic cylinder can play a role in buffering when the inner panel material is bent so as to prevent long-term bending fatigue of the middle part, and then the elastic lug gives a rebound force along with the bending of the leg part to help the leg part to recover and straighten; in another scheme, the middle part of the wearing surface of the embedded plate is provided with a groove which is convenient to fold, a crease is formed, the wearing surface is convenient to bend and is not easy to fatigue and fracture, the elastic protruding blocks on the supporting surface are triangular blocks which are thickened from two sides to the middle, and buffering and restoring force are provided through the triangular blocks after bending.

The invention also provides a preparation process of the walking aid device, which specifically comprises the following steps:

(1) Preparing raw materials, putting the raw materials into a double-screw extruder for extrusion granulation, and preparing oval or round particles with the particle size of 3-4mm through an underwater granulating system;

(2) Putting the prepared particles into a high-pressure reaction kettle, filling carbon dioxide into the reaction kettle, gradually increasing the pressure and the temperature of the reaction kettle to enable the carbon dioxide to reach a supercritical state, quickly releasing pressure after penetrating for a period of time in the supercritical state, and then quickly putting the penetrated particles into foaming equipment for heating and foaming to obtain foaming particles;

(3) Preparing the prepared foaming particles into an inner panel material with low density and high rebound resilience by adopting steam compression molding;

(4) Embedding the inner panel material into the designed protective sleeve to obtain the walking aid.

Further, in the step (2), when the carbon dioxide reaches a supercritical state, the pressure of the reaction kettle is 7-50MPa, and the temperature is 30-50 ℃.

Further preferably, the pressure of the reaction kettle in the supercritical state is 15MPa and the temperature is 45 ℃.

Further, the expanded particles are heated in the step (2) and have an expansion ratio of 5-10 times.

Further, in the step (3), the hardness of the embedded plate is 45-55 Shore C, and the rebound rate is 50% -70%.

The technical effects are as follows:

The whole preparation process of the walking aid device is environment-friendly and pollution-free, and the prepared microporous foam material has the characteristics of low density, high rebound resilience, strong mechanical property, good comfort, silence and the like, so that the device can solve the problems of poor rebound resilience, low comfort, large sound and the like of the traditional walking device and can also be widely applied to the field of body building and protection of human bodies.

The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.

Drawings

Fig. 1 is a schematic configuration diagram of a walking assist device of the present invention.

Fig. 2 is a schematic structural view of one embodiment of the embedded material in the walking assist device of the invention.

Fig. 3 is a schematic view of another embodiment of the walk-assisting device of the present invention incorporating materials.

Fig. 4 is a schematic view of another embodiment of the walk-assisting device of the present invention incorporating materials.

Fig. 5 is a schematic view showing the structure of another embodiment of the walk-assisting device of the present invention.

Fig. 6 is a schematic view of another embodiment of the walk-assist device of the present invention with embedded material.

In the figure, a protective sleeve 1, an embedded bag 2, a closed end 21, an inner panel material 3, a round chamfer 31, a reinforcing rib 32, an elastic cylinder 33, an arc-shaped surface 34, a groove 35, an elastic triangular block 36, an extension 4, a binding band 5 and a magic tape 6.

Detailed Description

The walking aid device of the invention shown in fig. 1 comprises a protective cover 1, wherein an embedded bag 2 is arranged in the middle of the protective cover 1, the embedded bag 2 is provided with a closed end 21 at least at the bottom side, an embedded board 3 is arranged in the embedded bag 2, the embedded board 3 is an elastic board made of foaming materials, the protective cover 1 is unfolded to two sides to form extension parts 4, a binding belt 5 is connected to the edge of each extension part 4, and preferably, the extension parts 4 are provided with two pairs and are respectively arranged at the upper side and the lower side of the protective cover 1. It is further preferred that the end of the strap 5 is provided with a velcro 6.

Preferably, the embedded bags 2 on the protecting sleeve 1 are arranged one above the other, and have a certain interval to form two accommodating spaces, and two ends of the plate material are respectively inserted into the upper and lower embedded bags 2 through the openings of the upper and lower embedded bags. The inner panel 3 has rounded chamfers 31 at both ends as shown in fig. 2.

Preferably, the material from which the protective sheath 1 is made is polyester fiber.

The inner panel 3 is elastically bendable, and one side surface of the inner panel 3 is a wearing surface facing the knee, and the other side surface is a supporting surface providing a repulsive force, and the inner panel 3 is folded toward the supporting surface side when being bent.

In one embodiment of the present invention, as shown in fig. 3, a plurality of reinforcing ribs 32 are provided on the support surface of the inner panel 3, and the length direction of the reinforcing ribs 32 is parallel to the length direction of the inner panel 3.

In another embodiment of the present invention, as shown in fig. 4, an elastic cylinder 33 is fixedly connected to the middle portion of the embedded plate 3, and the elastic cylinder 33 is made of a foaming material.

In another embodiment of the present invention, as shown in fig. 5, the middle portion of the embedded plate 3 is bent into an arc surface 34, and the bending direction of the arc surface 34 is matched with the knee bending direction.

In another embodiment of the present invention, as shown in fig. 6, the embedded plate 3 is in a long flat shape, both ends of the embedded plate are provided with round chamfers 31, the middle of the wearing surface of the embedded plate 3 is provided with grooves 35 which are convenient to fold, folds are formed, and elastic lugs on the supporting surface are provided with elastic triangular blocks 36 which thicken from two sides to the middle.

(2) And (3) putting the prepared particles into a high-pressure reaction kettle, filling carbon dioxide into the reaction kettle, gradually increasing the pressure and the temperature of the reaction kettle to enable the carbon dioxide to reach a supercritical state, wherein the pressure of the reaction kettle is 7-50MPa, and the temperature of the reaction kettle is 30-50 ℃. Rapidly releasing pressure after infiltration for 2-3h in the state, rapidly placing the infiltrated particles into foaming equipment, heating and foaming at 100-130 ℃, and expanding the particles by 5-10 times to obtain foamed particles;

(3) Preparing the prepared foaming particles into an inner panel material with low density and high rebound resilience by adopting steam compression molding, wherein the length of the inner panel material formed by the die is 20cm, 4cm and 2cm; the hardness of the embedded plate is 45-55 Shore C, and the rebound rate is 50% -70%;

Preferably, the raw material of the embedded plate is one or a mixture of more of thermoplastic polyurethane, PA, PE and PP.

Preferably, the pressure of the reaction kettle in the supercritical state is 15MPa, and the temperature is 45 ℃.

The process of preparing the walking aid of the present invention is further illustrated by the following examples.

Example 1

Extruding and granulating the thermoplastic polyurethane elastomer raw material, and controlling the particle size to be about 4 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 7Mpa and the temperature reach 30 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 120 ℃, and foaming at the moment to obtain the thermoplastic polyurethane microporous foaming particles. The foaming particles are subjected to steam compression molding to prepare a thermoplastic polyurethane microporous foaming material with ultra-light high elasticity and ultra-comfort silence, and the thermoplastic polyurethane microporous foaming material is placed into a designed protective sleeve (the protective sleeve is made of polyester fiber, the shape of the protective sleeve is similar to H, and magic tapes are adhered on binding belts on two sides of the protective sleeve and can be well adhered at knee joints), so that the walking auxiliary device with ultra-light ultra-high elasticity and comfort silence is formed, as shown in figure 1.

Example 2

Extruding and granulating the thermoplastic polyurethane elastomer raw material, and controlling the particle size to be about 4 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 15Mpa and the temperature 45 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 120 ℃, and foaming at the moment to obtain the thermoplastic polyurethane microporous foaming particles. The foaming particles are formed by steam compression molding of a specific mould to prepare the thermoplastic polyurethane microporous foaming material with ultra-light high elasticity and ultra-comfort silence, the two ends of the material are round, as shown in figure 2, and the material is put into a protective sleeve to form the walking aid with ultra-light ultra-high elasticity, comfort silence, as shown in figure 1.

Example 3

Extruding and granulating the thermoplastic polyurethane elastomer raw material, and controlling the particle size to be about 4 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 15Mpa and the temperature 45 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 120 ℃, and foaming at the moment to obtain the thermoplastic polyurethane microporous foaming particles. The foaming particles are formed by steam compression molding of a specific mould to prepare the thermoplastic polyurethane microporous foaming material with ultra-light high elasticity and ultra-comfort silence, the two ends of the material are round and smooth, one surface is provided with reinforcing ribs, as shown in figure 3, and the material is placed into a protective sleeve to form the walking aid with ultra-light ultra-high elasticity and comfort silence.

Example 4

Extruding and granulating the thermoplastic polyurethane elastomer raw material, and controlling the particle size to be about 4 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 15Mpa and the temperature 45 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 120 ℃, and foaming at the moment to obtain the thermoplastic polyurethane microporous foaming particles. The foaming particles are subjected to steam compression molding by a specific die to prepare the thermoplastic polyurethane microporous foaming material with ultra-light high elasticity and ultra-comfort silence, the two ends of the material are round, one surface of the material is provided with the thermoplastic polyurethane microporous foaming cylinder material, as shown in figure 4, and the material is placed into a protective sleeve to form the walking auxiliary device with ultra-light ultra-high elasticity and comfort silence.

Example 5

Extruding and granulating the thermoplastic polyurethane elastomer raw material, and controlling the particle size to be about 4 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 15Mpa and the temperature 45 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 120 ℃, and foaming at the moment to obtain the thermoplastic polyurethane microporous foaming particles. The foaming particles are formed by steam compression molding of a specific mould to prepare the thermoplastic polyurethane microporous foaming material with ultra-light high elasticity and ultra-comfort silence, the two ends of the material are round and smooth, the body is curved, as shown in figure 5, and the material is placed into a protective sleeve to form the walking aid with ultra-light ultra-high elasticity and comfort silence.

Example 6

The PA raw material is extruded and granulated, and the grain diameter is controlled to be about 3 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 25Mpa and the temperature reach 45 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 120 ℃, and foaming to obtain TPA microporous foam particles. The foaming particles are subjected to steam compression molding to prepare the TPA microporous foaming material with ultra-light high elasticity and ultra-comfort silence, and the TPA microporous foaming material is placed into a designed protective sleeve (the protective sleeve is made of polyester fiber, the shape of the protective sleeve is similar to H type, and the binding bands on two sides are adhered with magic tapes which can be well adhered to knee joints), so that the walking auxiliary device with ultra-light ultra-high elasticity and comfort silence is formed, as shown in figure 1.

Example 7

The PA raw material is extruded and granulated, and the grain diameter is controlled to be about 3 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 13Mpa and the temperature reach 40 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 120 ℃, and foaming to obtain TPA microporous foam particles. The foaming particles are formed by steam compression molding through a specific die to prepare the ultra-light high-elasticity ultra-comfortable silent TPA microporous foaming material, the two ends of the TPA microporous foaming material are round, as shown in figure 2, and the TPA microporous foaming material is placed into a protective sleeve to form the ultra-light ultra-high-elasticity comfortable silent walking auxiliary device, as shown in figure 1.

Example 8

The PA raw material is extruded and granulated, and the grain diameter is controlled to be about 4mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 13Mpa and the temperature reach 40 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 120 ℃, and foaming to obtain TPA microporous foam particles. The foaming particles are formed by steam compression molding through a specific die to prepare the ultra-light high-elasticity ultra-comfortable silent TPA microporous foaming material, the two ends of the material are round and moist, one surface of the material is provided with reinforcing ribs, as shown in figure 3, and the material is placed into a protective sleeve to form the ultra-light ultra-high-elasticity comfortable silent walking auxiliary device.

Example 9

The PA raw material is extruded and granulated, and the grain diameter is controlled to be about 3mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 13Mpa and the temperature reach 40 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 120 ℃, and foaming to obtain TPA microporous foam particles. The foaming particles are subjected to steam compression molding by a specific die to prepare the ultra-light high-elasticity ultra-comfortable silent TPA microporous foaming material, the two ends of the material are round, one surface of the material is provided with the TPA microporous foaming cylinder material, as shown in figure 4, and the material is placed into a protective sleeve to form the ultra-light ultra-high-elasticity comfortable silent walking auxiliary device.

Example 10

The PA raw material is extruded and granulated, and the grain diameter is controlled to be about 3 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 13Mpa and the temperature reach 40 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 120 ℃, and foaming to obtain TPA microporous foam particles. The foaming particles are formed by steam compression molding through a specific die to prepare the ultra-light high-elasticity ultra-comfortable silent TPA microporous foaming material, the two ends of the material are round, the body is curved, and the material is placed into a protective sleeve as shown in figure 5, so that the ultra-light ultra-high-elasticity comfortable silent walking auxiliary device is formed.

Example 11

The PE raw material is extruded and granulated, and the grain diameter is controlled to be about 4 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 40Mpa and the temperature reach 50 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, and heating to about 110 ℃, and foaming to obtain TPE microporous foaming particles. The foamed particles are subjected to steam compression molding to prepare a TPE microporous foamed material with ultra-light high elasticity and ultra-comfort silence, and the TPE microporous foamed material is placed into a designed protective sleeve (the protective sleeve is made of polyester fibers, the shape of the protective sleeve is similar to H type, and magic tapes are adhered on binding belts on two sides of the protective sleeve and can be well adhered to knee joints), so that the walking auxiliary device with ultra-light ultra-high elasticity and comfort silence is formed, as shown in figure 1.

Example 12

The PE raw material is extruded and granulated, and the grain diameter is controlled to be about 4 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 13Mpa and the temperature reach 45 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, and heating to about 110 ℃, and foaming to obtain TPE microporous foaming particles. The foamed particles are subjected to steam compression molding by a specific die to prepare the ultra-light high-elasticity ultra-comfortable silent TPE microporous foamed material, both ends of the TPE microporous foamed material are round, as shown in figure 2, and the TPE microporous foamed material is placed into a protective sleeve to form the ultra-light ultra-high-elasticity comfortable silent walking auxiliary device, as shown in figure 1.

Example 13

The PE raw material is extruded and granulated, and the grain diameter is controlled to be about 4 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 13Mpa and the temperature reach 45 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, and heating to about 110 ℃, and foaming to obtain TPE microporous foaming particles. The foamed particles are subjected to steam compression molding by a specific die to prepare the ultra-light high-elasticity ultra-comfortable silent TPE microporous foamed material, two ends of the material are round and smooth, one surface of the material is provided with reinforcing ribs, as shown in figure 3, and the material is placed into a protective sleeve to form the ultra-light ultra-high-elasticity comfortable silent walking auxiliary device.

Example 14

The PE raw material is extruded and granulated, and the grain diameter is controlled to be about 4 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 13Mpa and the temperature reach 45 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, and heating to about 110 ℃, and foaming to obtain TPE microporous foaming particles. The foamed particles are subjected to steam compression molding by a specific die to prepare the ultra-light high-elasticity ultra-comfortable silent TPE microporous foamed material, two ends of the material are round, one surface of the material is provided with the TPE microporous foamed cylinder material, and the material is placed into a protective sleeve as shown in figure 4, so that the ultra-light ultra-high-elasticity comfortable silent walking auxiliary device is formed.

Example 15

The PE raw material is extruded and granulated, and the grain diameter is controlled to be about 4 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 13Mpa and the temperature reach 45 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, and heating to about 110 ℃, and foaming to obtain TPE microporous foaming particles. The foamed particles are subjected to steam compression molding by a specific die to prepare the ultra-light high-elasticity ultra-comfortable silent TPE microporous foamed material, the two ends of the material are round, the trunk is curved, and the material is placed into a protective sleeve as shown in figure 5, so that the ultra-light ultra-high-elasticity comfortable silent walking auxiliary device is formed.

Example 16

The PP raw material is extruded and granulated, and the grain diameter is controlled to be about 3 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 50Mpa and the temperature reach 50 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 115 ℃, and foaming to obtain TPP microporous foaming particles. The foaming particles are subjected to steam compression molding to prepare a TPP microporous foaming material with ultra-light high elasticity and ultra-comfort silence, and the TPP microporous foaming material is placed into a designed protective sleeve (the protective sleeve is made of polyester fiber, the shape of the protective sleeve is similar to H, and the binding bands on two sides are adhered with magic tapes which can be well adhered to knee joints), so that the walking auxiliary device with ultra-light ultra-high elasticity and comfort silence is formed, as shown in figure 1.

Example 17

The PP raw material is extruded and granulated, and the grain diameter is controlled to be about 3 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 15Mpa and the temperature 40 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 115 ℃, and foaming to obtain TPP microporous foaming particles. The foaming particles are subjected to steam compression molding by a specific mold to prepare the ultra-light high-elasticity ultra-comfortable silent TPP microporous foaming material, the two ends of the material are round, as shown in figure 2, and the material is placed into a protective sleeve to form the ultra-light ultra-high-elasticity comfortable silent walking auxiliary device, as shown in figure 1.

Example 18

The PP raw material is extruded and granulated, and the grain diameter is controlled to be about 3 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 13Mpa and the temperature reach 40 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 115 ℃, and foaming to obtain TPP microporous foaming particles. The foaming particles are subjected to steam compression molding by a specific die to prepare the ultra-light high-elasticity ultra-comfortable silent TPP microporous foaming material, the two ends of the material are round, one surface of the material is provided with reinforcing ribs, as shown in figure 3, and the material is placed into a protective sleeve to form the ultra-light ultra-high-elasticity comfortable silent walking auxiliary device.

Example 19

The PP raw material is extruded and granulated, and the grain diameter is controlled to be about 3 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 15Mpa and the temperature 40 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 115 ℃, and foaming to obtain TPP microporous foaming particles. The foaming particles are subjected to steam compression molding by a specific die to prepare the ultra-light high-elasticity ultra-comfortable silent TPP microporous foaming material, the two ends of the material are round, one surface of the material is provided with the TPP microporous foaming cylinder material, as shown in figure 4, and the material is placed into a protective sleeve to form the ultra-light ultra-high-elasticity comfortable silent walking auxiliary device.

Example 20

The PP raw material is extruded and granulated, and the grain diameter is controlled to be about 3 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 15Mpa and the temperature 40 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 115 ℃, and foaming to obtain TPP microporous foaming particles. The foaming particles are subjected to steam compression molding by a specific mold to prepare the ultra-light high-elasticity ultra-comfortable silent TPP microporous foaming material, the two ends of the material are round, the trunk is curved, and the material is placed into a protective sleeve as shown in figure 5, so that the ultra-light ultra-high-elasticity comfortable silent walking auxiliary device is formed.

Example 21

The PP raw material is extruded and granulated, and the grain diameter is controlled to be about 3 mm. The particles are put into a supercritical carbon dioxide infiltration kettle, carbon dioxide is introduced and pressurized to make the pressure reach 15Mpa and the temperature 40 ℃, and the carbon dioxide is in a supercritical state. And (3) maintaining the pressure and penetrating for 2 hours in the state, rapidly releasing pressure, heating to about 15 ℃, and foaming to obtain TPP microporous foaming particles. The foaming particles are formed by steam compression molding through a specific die, and the TPP microporous foaming material with ultra-light high elasticity and ultra-comfort silence is prepared. The material is long and flat on both sides, the middle part is hollow, the wearing surface is provided with a hollow groove, the supporting surface is provided with triangular elastic protruding blocks, as shown in figure 6, and the material is put into the protective sleeve, so that the walking auxiliary device with ultra-light high-elasticity, comfort and silence is formed.

Performance testing

The test pieces of the built-in sheets prepared in examples 1 to 21 were subjected to performance tests including hardness, rebound resilience and the like.

Hardness: the hardness of each sample was tested using a Shore durometer according to the test standard specified in GB/T531-1999.

Rebound resilience: each test piece was tested for resilience according to the test standard specified in GB/T6670-2008.

The test results of each sample are shown in table 1.

Table 1: test results of sample Performance of various examples

Sample preparation	Hardness (Shore C)	Rebound Rate (%)
			Example 1	48	67
Example 2	50	69
			Example 3	51	70
Example 4	50	70
			Example 5	50	70
Example 6	52	60
			Example 7	51	65
Example 8	51	66
			Example 9	50	62
Example 10	51	66
			Example 11	46	61
Example 12	48	59
			Example 13	49	60
Example 14	50	61
			Example 15	49	62
Example 16	53	62
			Example 17	55	65
Example 18	52	64
			Example 19	52	64
Example 20	51	65
			Example 21	52	67

As can be seen from the table, the embedded material prepared by the method provided by the invention has proper hardness and good rebound resilience, so that the embedded material is suitable for being applied to the walking auxiliary device provided by the invention, can provide good rebound resilience, and has good comfort level when being used for assisting a human body to walk.

The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. The walking auxiliary device is characterized by comprising a protective sleeve, wherein an embedded bag is arranged in the middle of the protective sleeve, at least the bottom side of the embedded bag is provided with a closed end, an inner panel material is arranged in the embedded bag, the embedded panel material is an elastic panel material made of a foaming material, the protective sleeve is unfolded to two sides to form extension parts, and the edge of each extension part is connected with a binding belt;

The embedded plate can be elastically bent, one side surface of the embedded plate is a wearing surface facing the knee, the other side surface of the embedded plate is a supporting surface for providing resilience force, and the embedded plate is folded towards the supporting surface side when being bent; the middle part of the supporting surface of the inner panel material is fixedly connected with an elastic lug which is made of foaming materials; the elastic lug is arranged as an elastic cylinder which is made of foaming material, and when the inner panel material is assembled, the elastic cylinder faces away from the knee.

2. The walking assist device of claim 1, wherein the extension is provided in two pairs and is disposed on the upper and lower sides of the protective sheath, respectively.

3. The walking auxiliary device is characterized by comprising a protective sleeve, wherein an embedded bag is arranged in the middle of the protective sleeve, at least the bottom side of the embedded bag is provided with a closed end, an inner panel material is arranged in the embedded bag, the embedded panel material is an elastic panel material made of a foaming material, the protective sleeve is unfolded to two sides to form extension parts, and the edge of each extension part is connected with a binding belt;

the embedded plate can be elastically bent, one side surface of the embedded plate is a wearing surface facing the knee, the other side surface of the embedded plate is a supporting surface for providing resilience force, and the embedded plate is folded towards the supporting surface side when being bent; the middle part of the supporting surface of the inner panel material is fixedly connected with an elastic lug which is made of foaming materials; the middle part of the wearing surface of the embedded plate is provided with a groove which is convenient to fold, and the elastic protruding blocks on the supporting surface of the embedded plate are triangular blocks which thicken from two sides to the middle.

4. A walking aid as claimed in claim 3, wherein the extension is provided in two pairs and is provided on the upper and lower sides of the guard.

5. A process for preparing a walking assist device as claimed in claim 1 or 3, comprising the steps of:

(4) And embedding the inner panel material into the designed protective sleeve to obtain the walking aid.

6. The process for producing a walking assist device as defined in claim 5, wherein in step (2), when carbon dioxide reaches a supercritical state, the pressure of the reaction vessel is 7-50MPa and the temperature is 30-50 ℃.

7. The process for producing a walking aid device as claimed in claim 5, wherein the expanded particles heated in step (2) have an expansion ratio of 5 to 10 times.

8. The process for producing a walking aid of claim 5, wherein in step (3), the hardness of the embedded plate is 45-55 Shore C, and the rebound rate is 50% -70%.