KR-102963477-B1 - Last and midsole structure for manufacturing women’s comfort shoes based on ergonomic design

Abstract

The present invention relates to a last and midsole structure for manufacturing women's comfort shoes based on an ergonomic design, and more specifically, to a last and midsole structure for manufacturing women's comfort shoes based on an ergonomic design that precisely implements heel sinking phenomena from the last and midsole design stage based on ergonomic analysis and 3D foot shape data. To this end, the present invention provides a last and a midsole structure for manufacturing women's comfort shoes based on an ergonomic design, comprising: a rear foot portion formed from the rear end to 26% of the total length; a midfoot portion formed from the front end of the rear foot to 66% to 68% of the total length; and a forefoot portion formed from the front end of the midfoot to the entire front end, wherein the midfoot portion includes an arch portion indented on the inner side toward the centerline.

Inventors

• 김기학

Dates

Publication Date

20260511

Application Date

20250904

Claims (3)

1. A hindfoot formed from the rear end to 26% of the total length; A midfoot formed from the anterior end of the hindfoot to a length of 66% to 68% of the total length; The forefoot formed from the anterior midfoot to the entire anterior part Includes, The midfoot An arch portion indented on the inner side toward the centerline Includes, The hindfoot The rear end forms a curved shape, corresponding to the anatomical structure of the actual foot. Includes, The undersides of the hindfoot and midfoot are equipped with metal reinforcements. The boundary between the forefoot and midfoot protrudes most downward, and an upward slope is formed as it extends forward and backward from the boundary between the forefoot and midfoot. At the boundary between the forefoot and midfoot, the anterior side is sloped at a constant angle, whereas the posterior side is sloped at a relatively large angle from the beginning of the arch to the center of the arch, and at a relatively small angle from the center of the arch. Last structure for manufacturing women's comfort shoes based on ergonomic design including
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Description

Last and midsole structure for manufacturing women’s comfort shoes based on ergonomic design The present invention relates to a last and midsole structure for manufacturing women's comfort shoes based on an ergonomic design, and more specifically, to a last and midsole structure for manufacturing women's comfort shoes based on an ergonomic design that precisely implements the heel sinking phenomenon from the last and midsole design stage based on ergonomic analysis and 3D foot shape data. Generally, the lasts used to manufacture shoes are shaped like the foot and are made of metal, wood, or synthetic resin. When manufacturing shoes using a last, the shoe is manufactured by attaching a shoe sole to the lower circumference of the upper while the upper forming the shape of the shoe is placed over the outer surface of the last, and then separating the last. In this way, a space corresponding to the shape of the last is formed inside the shoe, so a shoe that can be worn on the foot is manufactured. However, conventional lasts are manufactured to roughly represent the overall shape of the foot while omitting specific curved parts of the human foot, such as the toes or ankles; consequently, when purchasing and wearing shoes for the first time, there is a problem where the shoes do not fit well and cause discomfort. One of the reasons why conventional lasts have been manufactured by roughly following a mold of the foot shape is that they have maintained a mass production method focused on the producer. Consequently, the importance of fitting when worn was disregarded, and they were designed to be the easiest to manufacture and similar to the shape of the foot. Until now, such lasts have been made to be convenient for shoe manufacturing, considering only the perspectives of the producer and seller rather than the customer. However, the use of such lasts has resulted in the inconvenient problems mentioned above. In particular, the last and midsole designs of women's high heels failed to reflect the anatomical depression of the heel and were manufactured with a straight structure. These design limitations cause the load to shift excessively forward, as the sagging phenomenon in that area is not reproduced, even though approximately 70% of the foot load should be concentrated in the heel area, especially in high heels with a heel height of 6 cm or more. As a result, there were problems such as intensified forward leaning during walking and increased risk of foot fatigue and deformation. Therefore, there is an urgent need to design lasts and midsoles that can resolve these problems. Prior Art: KR Registered Patent Publication No. 10-2036829 (Published Oct. 28, 2019) FIG. 1 is a drawing illustrating that reinforcing materials are provided on the lower surface of the rearfoot and midfoot portions of a last for manufacturing women's comfort shoes based on an ergonomic design according to a preferred embodiment of the present invention. FIG. 2 is a diagram showing the foot pressure distribution according to the shape of the shoe, FIG. 3 is a drawing showing a midsole design pattern for the shape of the foot. Figure 4 is a drawing showing a functional midsole design pattern, FIG. 5 is a drawing showing a last model considering foot characteristics and a foot pressure distribution state showing a shifting phenomenon. FIG. 6 is a drawing showing the upper surface of the midsole, FIG. 7 is a drawing showing the lower surface of the midsole. FIG. 8 is a drawing showing the side of the midsole, FIG. 9 is a drawing showing the top and side surfaces of the mid-seat, FIG. 10 is a drawing showing the lower surface and side of the midsole. FIG. 11 is a drawing showing a cross-section of the midsole, FIG. 12 is a drawing showing the plan and cross-sectional views of the last. FIG. 13 is a drawing showing a cross-section of the last. FIG. 14 is a drawing comparing a conventional last with a last for manufacturing women's comfort shoes based on an ergonomic design according to a preferred embodiment of the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the present invention, such detailed description is omitted. Additionally, while preferred embodiments of the present invention will be described below, the technical concept of the present invention is not limited or restricted thereto and can be modified and implemented in various ways by those skilled in the art. FIG. 1 is a drawing illustrating that reinforcing materials are provided on the lower surface