The present invention relates to an upper structure.
To have a sufficient support and structure strength, the upper of shoe may not be manufactured with material too soft. However, for comfort and easier movements, the upper of shoe may not be manufactured with material too hard. Thus, material having better support makes the movements of feet difficult, but soft material which is comfortable provides less support to result injury easily.
The main object of the present invention is to provide an upper structure providing sufficient support from lateral sides and to be comfortable to wear.
To achieve the above and other objects, then upper structure adapted for engaging with a sole to form a shoe body includes a main body. The main body has an outer surface and an inner surface. The inner surface and the sole enclose an internal space. Each of at least two lateral sides of the inner surface has a gel layer. The two gel layers correspond to two longer sides of the sole respectively. Each of the gel layers is composed of a gel of non-Newtonian fluid to engage with the main body.
The elastic element is disposed between the main body and the jaw portion and provides an elastic force so that the movable jaw tends to move toward the fixed jaw.
Thereby, the wrench of the present invention is able to fully transmit the force exerted by a user to the movable jaw and the fixed jaw. Thus, the wrench of the present invention is easy to be operated and has a simple structure to reduce manufacturing cost.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment(s) in accordance with the present invention.
Please refer to
In the present embodiment, the inner surface of the main body 111 has another gel layer 112 at a front side thereof to connect to the gel layers 112 at two lateral sides of the inner surface to be a single piece which is U-shaped. Thereby, the gel layers 112 surround a front half of a foot. Preferably, a top gel layer can be included. The top gel layer includes at least one stripe-shaped gel layer 113 composed of said gel of non-Newtonian fluid. Two ends of the stripe-shaped gel layer 113 are connected to the two lateral sides of the main body 111 respectively, and the stripe-shaped gel layer 113 corresponds to the top of the shoe body 10. More preferably, the top gel layer includes two said stripe-shaped gel layers 113 crossing in X shape to provide better support. Specifically, the top gel layer and the gel layers 112 can be formed as a single piece to further improve the structure strength and durability. Besides, the top gel layer and the gel layers 112 are preferably engaged with the main body 111 by adhesive, such as glue or hot-melt adhesive.
Preferably, the gel of the gel layers 112 and the top gel layer are polyurethane gel (PU) gel with multifunctional groups to have a mesh-like microstructure and is able to resist high temperature over 200 degrees Celsius. When the gel is touched by human body, the gel may be slightly softened to provide better resilience.
Preferably, a length of each of the gel layers 112 along the longer side of the sole 12 is more than half a length of the longer side of the sole 12. That is, the gel layers 112 at least cover the front half of the foot to provide better support and fixation to the front half of foot which bears more impact. In other possible embodiments, the gel layers 112 can surround the whole sole 12 to completely cover the periphery of foot.
In the tensile strength tests on the gel layer which is exerted with slow compression, the results are shown in the following table.
In the tensile strength tests on the gel layer which is exerted with sudden (quick) shock, the results are shown in the following table.
In view of
The gel layers are made of non-Newtonian fluid, so the gel layers sink just like other material when pressed slowly. However, when the gel layers receive strong impact in a short time, the gel layers may not sink much. On the contrary, the gel layers provide a force of rebound. Thereby, when the user walks normally, the gel layers may sink to provide softness and cushion. However, when the user jumps or runs, the gel layers provide a force of rebound to prevent the upper structure from inclining toward lateral sides. Thus, the movements of jumping or running continuously become easier, and the feet are prevented from injury.
Number | Date | Country | Kind |
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108200986 | Jan 2019 | TW | national |