CN111407017A

CN111407017A - Wearable initiative fastening knee-pad based on dielectric elastomer driver

Info

Publication number: CN111407017A
Application number: CN202010324037.5A
Authority: CN
Inventors: 李铁风; 曹许诺; 许艺; 尹顺禹; 张明琦
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU; Guangdong Bozhilin Robot Co Ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-07-14

Abstract

The invention discloses a wearable active fastening knee pad based on a dielectric elastomer driver. The wearable active fastening knee pad of the present invention comprises a dielectric elastomer driver device detachably fixed to a wearable knee pad body at a position corresponding to the knee. The invention realizes the adjustment of the fastening force of the sports knee pad through the electrostriction characteristic of the dielectric elastomer driver device, so that the sports knee pad can adapt to the sports with different intensities, thereby better reducing the impact of the sports on the knee joint, assisting the knee joint to exert force and effectively protecting the knee.

Description

Wearable initiative fastening knee-pad based on dielectric elastomer driver

Technical Field

The invention belongs to the technical field of bionic materials, and particularly relates to a wearable active fastening knee pad based on a dielectric elastomer driver.

Background

With the continuous improvement of the quality of life and the rise of personal outdoor sports, such as: the functions of the knee can be exercised by climbing, riding, cross-country and walking on foot, but the knee joint or the elbow joint is excessively stressed and worn by improper or violent sports, and the knee joint is easily injured particularly in various competitive sports with intense intensity, such as the knee joint is injured due to the dislocation of the patella. Therefore, in sports, people often use knee pads to secure and protect the knee.

Conventional athletic knee wraps are a sleeve-like knit fabric that is usually covered in a thickened or filled barrier layer of flexible material such as hydrogel, foam, etc. to protect the knee. Although the sports knee pad can weaken the damage of the sports to the knee to a certain extent, the traditional sports knee pads belong to passive protection at present, and the protection effect and the fastening effect of the traditional sports knee pad on the knee cannot be correspondingly adjusted according to the sports intensity.

Disclosure of Invention

In response to the above-identified deficiencies in or needs for improvement over the prior art, the present invention provides a wearable active fastening knee brace based on dielectric elastomer drivers. The fastening force of the sports knee pad is adjusted through the electrostriction characteristic of the dielectric elastomer driver, so that the sports knee pad can adapt to sports with different intensities, the impact of the sports on the knee joint is reduced better, the knee joint is assisted to exert force, and the knee joint is protected effectively.

To achieve the above object, the present invention provides a wearable active fastening knee pad based on a dielectric elastomer driver, the active fastening knee pad comprising a dielectric elastomer driver device and a wearable knee pad body, the dielectric elastomer driver device being detachably fixed to the wearable knee pad body at a position corresponding to the knee;

dielectric elastomer drive arrangement includes dielectric elastomer driver, EVA cloth, magic subsides and battery package, the EVA cloth passes through the magic to be pasted and fixes in dielectric elastomer driver both sides, and the battery package passes through the magic and pastes and fix on the EVA cloth.

Furthermore, dielectric elastomer drive arrangement includes floorcloth, elastic webbing, battery package and dielectric elastomer driver, fixed a plurality of spacing knots that set up on the floorcloth, a plurality of elastic webbing are fixed around the dielectric elastomer driver, and a plurality of elastic webbing pass a plurality of spacing knots that set up on the floorcloth, the battery package can be dismantled and fix on the floorcloth.

Furthermore, the dielectric elastomer driver comprises a dielectric elastomer film, conductive carbon paste, wires and a flexible frame, wherein the conductive carbon paste is coated on two sides of the dielectric elastomer film, the wires are led out from two sides of the conductive carbon paste, and the flexible frame is perpendicular to the length direction of the dielectric elastomer film and is arranged at intervals along the length direction of the dielectric elastomer film.

Further, the dielectric elastomer film is pre-stretched, and the flexible frame is molded by Polydimethylsiloxane (PDMS).

Furthermore, the elastic band is a silica gel strip.

Furthermore, the wearable knee pad main body comprises knee pad main body cloth, an O-shaped silica gel ring and EVA cloth, wherein the EVA cloth is arranged on the outer side surface of the knee pad main body cloth, and the O-shaped silica gel ring is arranged on the outer side surface of the EVA cloth.

Furthermore, the dielectric elastomer driving device is fixed above the O-shaped silicon rubber ring.

Compared with the prior art, the invention has the beneficial effects that: the dielectric elastomer driving device is detachably fixed above the O-shaped silica gel ring, and the patella is fixed by pressure provided by the tension force of the dielectric elastomer driver; the dielectric elastomer driver fixes the knee joint by the tensile force generated after the elastic band is stretched to prevent dislocation; the driver can be electrified and can realize the adjustment of the tension force depending on the voltage. The fastening force of the sports knee pad is adjusted through the electrostriction characteristic of the dielectric elastomer driver, so that the sports knee pad can adapt to sports with different intensities, the impact of the sports on the knee joint is reduced better, the knee joint is assisted to exert force, and the knee joint is protected effectively.

Drawings

Fig. 1 is a schematic structural view of the body of a wearable knee pad of the present invention;

FIG. 2 is a schematic structural diagram of a dielectric elastomer driving device according to a first embodiment of the invention;

FIG. 3 is a schematic structural diagram of a dielectric elastomer driving device according to a second embodiment of the present invention;

fig. 4 is a schematic diagram of the dielectric elastomer actuator structure of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In the embodiments of the present invention, the first, second, etc. are used only for distinguishing different description objects unless otherwise specified.

As shown in fig. 1-4, the present invention provides a wearable active fastening knee brace based on a dielectric elastomer driver, comprising a dielectric elastomer driver device and a wearable knee brace body, the dielectric elastomer driver device being detachably fixed to the wearable knee brace body at a position corresponding to the knee.

In the first embodiment, as shown in fig. 2, the dielectric elastomer driving device includes a dielectric elastomer driver 8, an EVA fabric 6,

velcro tapes

5 or 7, and a battery pack 4, the EVA fabric 7 is fixed on both sides of the dielectric elastomer driver 8 through the velcro tapes 5, and the battery pack 4 is fixed on the EVA fabric 6 through the velcro tapes 7.

The two EVA cloth 6 can wind around the leg at the knee and can be pasted on a magic tape, so that the dielectric elastomer driver 8 is fixed on the wearable knee pad main body at the position corresponding to the knee; the battery pack 4 is fixed on the EVA cloth 6 and can provide power for the dielectric elastomer driver 8.

In the second embodiment, as shown in fig. 3, the dielectric elastomer driving device includes a cloth liner 10, elastic bands 9, a battery pack and a dielectric elastomer driver 8, wherein a plurality of limit fasteners are fixedly arranged on the cloth liner 10, the elastic bands 9 are fixed around the dielectric elastomer driver 8, the elastic bands 9 penetrate through the limit fasteners arranged on the cloth liner 10, and the battery pack is detachably fixed on the cloth liner 10.

The cloth liner 10 can be sewn on the main body cloth 1 of the knee pad at the position corresponding to the knee, a plurality of limit buttons, preferably 4 limit buttons, are fixedly arranged on the periphery of the cloth liner 10, and the elastic band 9 can pass through the limit buttons and be fixed around the leg, so that the dielectric elastomer driver is fixed on the cloth liner 10 at the position corresponding to the knee.

The elastic band 9 is made of an elastic material, preferably a silicone material.

In order to meet the requirement that the product is more convenient to wear in daily life, the knee joint is fully covered on the structural part of the knee pad, the thigh of the half-covered shank provides a larger expansion space, the ring buckle provides high tension, the double-interlayer design is adopted, and the driver is stacked in the middle. The driver part is connected with the inner layer elastic cloth of the kneepad, is separated from the outer layer cloth, and is independently pulled by the traction strip and fixed at the bayonet of the rubber strip or fixed at the bayonet of the opposite side around the back side of the kneepad.

As shown in fig. 4, the dielectric elastomer driver 8 includes a dielectric elastomer film 13, conductive carbon paste 12, wires 11, and flexible frames 14, the conductive carbon paste 12 is coated on both sides of the dielectric elastomer film 13, the wires 11 are led out from both sides of the conductive carbon paste 12, and the flexible frames 14 are perpendicular to the length direction of the dielectric elastomer film 13 and are spaced along the length direction of the dielectric elastomer film 13.

The dielectric elastomer film is pre-stretched, and the flexible framework is formed by molding Polydimethylsiloxane (PDMS).

As shown in fig. 1, the wearable knee pad main body includes a knee pad main body fabric 1, an O-shaped silica gel ring 3, and an EVA fabric 2, the EVA fabric 2 is disposed on the outer side of the knee pad main body fabric 1 at a position corresponding to the knee, and the O-shaped silica gel ring 3 is disposed on the outer side of the EVA fabric 2.

The dielectric elastomer driving device is detachably fixed above the O-shaped silica gel ring, and the patella is fixed by pressure provided by the tension force of the dielectric elastomer driver; the dielectric elastomer driver fixes the knee joint by the tensile force generated after the elastic band is stretched to prevent dislocation; the driver can be electrified and can realize the adjustment of the tension force depending on the voltage. The fastening force of the sports knee pad is adjusted through the electrostriction characteristic of the dielectric elastomer driver, so that the sports knee pad can adapt to sports with different intensities, the impact of the sports on the knee joint is reduced better, the knee joint is assisted to exert force, and the knee joint is protected effectively.

The dielectric elastomer driver framework has low Young's modulus and can fit complex knee joint bones; the frame has higher adhesive strength with the dielectric elastomer film after being subjected to oxygen plasma surface treatment, and can not fall off during large deformation.

The above embodiments are only for illustrating the invention and are not to be construed as limiting the invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, therefore, all equivalent technical solutions also belong to the scope of the invention, and the scope of the invention is defined by the claims.

Claims

1. A wearable active fastening knee brace based on a dielectric elastomer driver, comprising a dielectric elastomer driver device and a wearable knee brace body, the dielectric elastomer driver device being removably secured to the wearable knee brace body at a location corresponding to a knee.

2. Wearable active fastening knee protection according to claim 1, characterized in that the dielectric elastomer drive means comprises a dielectric elastomer driver (8), EVA cloth (6), hook and loop fasteners and a battery pack (4), the EVA cloth (6) is fixed on both sides of the dielectric elastomer driver (8) by hook and loop fasteners, the battery pack (4) is fixed on the EVA cloth (6) by hook and loop fasteners.

3. Wearable active fastening knee pad according to claim 1, characterized in that the dielectric elastomer drive means comprises a cloth pad (10), an elastic band (9), a battery pack and a dielectric elastomer drive (8), wherein the cloth pad (10) is fixedly provided with a plurality of position-limiting buttons, the elastic band (9) is fixed around the dielectric elastomer drive (8), the elastic band (9) passes through the position-limiting buttons provided on the cloth pad (10), and the battery pack is detachably fixed on the cloth pad (10).

4. Wearable active fastening knee pad according to claim 2 or 3, characterized in that the dielectric elastomer drive (8) comprises a dielectric elastomer film (13), an electrically conductive carbon paste (12), wires (11) and a flexible frame (14), the conductive carbon paste (12) being coated on both sides of the dielectric elastomer film (13), the wires (11) being led out from both sides of the conductive carbon paste (12), the flexible frame (14) being arranged perpendicular to the length direction of the dielectric elastomer film (13) and spaced along the length direction of the dielectric elastomer film (13).

5. The wearable active fastening knee brace of claim 4 wherein the dielectric elastomer film is pre-stretched and the flexible frame is molded of Polydimethylsiloxane (PDMS).

6. Wearable active fastening knee pad according to any of claims 1 to 5, characterized in that the wearable knee pad body comprises a knee pad body fabric (1), an O-shaped silicone ring (3) and an EVA fabric (2), the EVA fabric (2) being arranged on the outer side of the knee pad body fabric (1) at a position corresponding to the knee, the O-shaped silicone ring (3) being arranged on the outer side of the EVA fabric (2).

7. The wearable active fastening knee brace of claim 6 wherein the dielectric elastomer drive is secured over an O-ring silicone rubber.

8. The wearable active fastening knee brace of claim 3 wherein the number of retaining buckles is 4 and the number of elastic straps is 4.