Snowboard boots

Abstract: A snowboard boot (1) includes a sole region (2); an upper outer layer extending from the sole region (2) to an instep region (6); and a foot support (11) disposed inside the upper outer layer. The foot support (11) includes a right foot support and a left foot support. The right foot support is disposed inside the upper outer layer of the boot on a right side thereof and extends from the sole region (2) toward the instep region (6). The right foot support includes a right foot tightening structure (11b) disposed in close proximity to the instep region. The left foot support is disposed inside the upper outer layer of the boot on a left side thereof and extends from the sole region (2) toward the instep region (6). The left foot support includes a left foot tightening structure (11b) disposed in close proximity to the instep region. If desired, an insulating layer (28) may be disposed between the upper outer layer and the right and left foot supports. The outer layer may include its own foot tightening structure (25) for tightening the upper outer layer independently of the foot support.

Description: BACKGROUND OF THE INVENTION The present invention is directed to snowboard boots and, more particularly, to a snowboard boot which includes a more effective tightening mechanism for tightening the boot the foot. Snowboards, used as modem sports equipment, are a modification of skis. Typical snowboards are simple short boards which accommodate two feet, but they require greater leg strength to operate than skis. As a result, snowboard boots must be fixed more strongly to the snowboard than ski boots are fixed to skis, and the snowboard boots must also be fixed more strongly to the feet. Typical snowboard boots typically include heat insulators such as thick sponges disposed between the foot and the outermost portion of the boot main body. When the leather that constitutes the outermost portion (shell) of the boot main body is fastened with a cord, buckle, Velcro® Fastener or the like, it is difficult to hold the foot securely in the boot main body due to the fact that the heat insulators can not be fixed and are readily deformed. On the other hand, secure tightening, even when it is achieved, sometimes impedes blood circulation in the feet. Because this must be prevented, the boot cannot be tightened with considerable force through the use of buckles and other conventional structures. US Patent No 4562 654 discloses a sports shoe that is typical of the prior art, as does US Patent No 4 949 479, which discloses a snowboard boot. SUMMARY OF THE INVENTION The present invention is directed to a snowboard boot which includes a more effective tightening mechanism for tightening the boot to the foot. In particular, a tightening means is located inside the boot, and, if desired, the outer layer of the boot may be tightened independently of the inner tightening means. According to the present invention there is provided a snowboard boot according to claim 1. Preferable features of the boot are set out in the dependent claims. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side view of a particular embodiment of a snowboard boot according to the present invention; and Figure 2 is a cross sectional view taken along line II-II in Figure 1. DETAILED DESCRIPTION OF THE EMBODIMENTS Figure 1 is a side view of a particular embodiment of a snowboard boot according to the present invention. As shown in Figure 1, the snowboard boot main body 1 basically comprises a sole 2, a toe 3, a heel 4, a cylindrical leg 5, and an instep 6 extending from the leg 5 to the toe 3. An instep-reinforcing member 7, which is made of leather (man-made or natural), shaped as a saddle, and designed to reinforce and tighten the instep 6, is attached to the instep 6 by sewing, bonding, or another means. An insole 8 that is in conformity with the curved surface of the sole 2 is provided to the sole 2. The insole 8 is made from a plastic, metal, or other relatively rigid material to ensure foot stability. A foot support 11 is mounted inside the main body 1. In this embodiment, the foot. support 11 is formed from a relatively hard resin or from a pliable, unstretchable material such as a flexible resin. In Figure 1, the foot support 11 is shown in an open state and is superimposed on the snowboard boot main body 1 for clarity. Thereafter the foot support 11 is mounted in the snowboard boot main body 1 in conformity with the curved surfaces on the inside of the toe 3, heel 4, and instep 6. In this embodiment, the foot support 11 comprises a lower component 11a, a plurality of upper components 11b, and a back component 11c. The holding edge (lasting margin) of the lower component 11a of the foot support 11 is folded back and securely integrated with the insole 8. The integration can be achieved by sewing, tucking, bonding, insertion, or any other known means. A plurality of cuts or slits 14 formed in the lower component 11a extend forward and upward at a slant with respect to the sole 2. Upper components 11b are directed forward and upward at a slant with respect to the sole 2 away from the lower component 11a, and they are elongated to form a comb shape. First cord-threading holes 12 shaped as eyelets are bored in the corresponding tips of the upper components 11b. The foot support 11 is provided on the left and right sides of the boot. In this embodiment, the left and right halves of the foot support 11 are joined together by a back component 11c which is shaped like a strap and which passes around the back of the boot near the heel 4, but such a connection is not necessary. A leg support 21 having the same shape as the foot support 11 is mounted inside the leg 5. The leg support 21 comprises aback component 21a folded around the back of the leg, and front components 21b projecting forward from the both sides of the back component 21a. A plurality of elongated front components 21b are provided, and these components extend forward from the back component 21a, forming a comb shape. Second cord-threading holes 22 in the form of eyelets are bored in the corresponding tips of the elongated front components 21b. Figure 2 is a cross section taken along line II-II in Figure 1. A second eyelet 26 forms a second cord-threading hole 25 in the instep 6. The foot support 11 is lined on both sides with a conforming liner 27. The liner 27 comprises an inner liner 27a (such as EVA; ethylene-vinyl acetate copolymer resin) and an outer liner 27b (preferably made of the same material as 27a, that is, ethylene-vinyl acetate copolymer resin, or EVA). The outer liner 27b is sandwiched between the instep 6 and the foot support 11. The inner liner 27a is disposed inside the foot support 11. A spongy heat insulator 28 (for example, expanded polyurethane) is interposed between the foot support 11 and the outer liner 27b. To use the boot according to the present invention, a lace (not shown) is threaded through the plurality of the first cord-threading holes 12 of the upper components 11b. By pulling at the both ends of the lace thus threaded, it is possible to draw closer together the upper components 11b on both sides of the foot support 11. The upper components 11b acted on with this tightening force tightly secure the foot without the intermediary of the heat insulator 28. If desired, the lace can also be threaded through a second eyelet 25 of the instep 6 of the snowboard boot main body 1. The tightening force is exerted directly on the foot, so the foot is stably held against the strong insole 8 of the sole. Such tightening holds the heel steady against the back component 11c as well. The instep 6 and the instep-reinforcing member 7 also may be tightened on the outside with a lace in a conventional manner. If desired, separate laces can be used for the lace that is threaded through the first cord-threading holes 12 and for the lace that is threaded through the second eyelets 25. In this case the tension levels of the two cords are independent of each other. While the above is a description of various embodiments of the present invention, further modifications may be employed. For example, the foot support 11 described above was positioned inside the boot main body 1 close to the foot inside the heat insulator 28, but the foot support 11 can also be placed outside the outer structure 1, although this reduces the foot tightening effect somewhat. In addition, although the first and second cord-threading holes 12 and 22 in this embodiment were shaped as eyelets, it is also possible to use a common structure such as that in which circular metal rings are enclosed in plate-shape metal components or the like, and these metal plate components are fastened to form eyelets. Thus, the scope of the invention should not be limited by the specific structures disclosed. Instead, the true scope of the invention should be determined by the following claims.

Claims: A snowboard boot (1) comprising: a sole region (2), a toe (3), a heel (4) and a leg (5); an upper outer layer extending from the sole region (2) to an instep region (6); and a foot support including: a right foot support (11) disposed inside the upper outer layer of the boot on a right side thereof and extending from the sole region (2) toward the instep region (6), the right foot support including a right foot tightening structure (11b) disposed in close proximity to the instep region; and a left foot support (11) disposed inside the upper outer layer of the boot on a left side thereof and extending from the sole region (2) toward the instep region (6), the left foot support including a left foot tightening structure (11b) disposed in close proximity to the instep region; characterised in that the boot includes a right insulating layer (28) disposed between the upper outer layer and the right foot support (11); and a left insulating layer (28) disposed between the upper outer layer and the left foot support (11). A snowboard boot according to claim 1, wherein: the boot has a sole to which the upper outer layer is fixed; the right foot support (11) is fixed to the sole on a right side thereof, the right foot support including a plurality of right foot support components (11b) forming a comb shape and terminating at the instep region (6); the left foot support (11) is fixed to the sole on a left side thereof, the left foot support including a plurality of left foot support components (11b) forming a comb shape and terminating at the instep region (6); and each of the plurality of right foot support components (11b) and each of the plurality of left foot support components (11b) includes an eyelet (12) formed at a free end thereof. A snowboard boot according to any preceding claim, wherein the upper outer layer includes an upper outer layer foot tightening structure (25) for tightening the upper outer layer independently of the foot support. A snowboard boot according to claim 3, wherein the upper outer layer foot tightening structure comprises a plurality of eyelets (26) disposed in the upper outer layer. A snowboard boot according to any preceding claim, wherein the foot. support further comprises a back foot support (11c) bridging the right foot support and the left foot support around a back side of the boot. A snowboard boot according to any preceding claim, wherein the right foot support comprises a plurality of spaced apart right foot support components (11b) extending toward the instep region (6), and wherein the left foot support comprises a plurality of spaced apart left foot support components (11b) extending toward the instep region (6). A snowboard boot according claim 6, wherein each of the plurality of right foot support components (11b) and each of the plurality of left foot support components (11b) includes an eyelet (12) positioned in close proximity to the instep region. A snowboard boot according to either of claims 6 or 7, wherein each of the plurality of right foot support components (11b) and each of the plurality of left foot support components (11b) includes an eyelet (12) formed at a free end thereof. A snowboard boot according to any preceding claim, wherein the snowboard boot further comprises: a leg outer layer extending upwardly from the upper outer layer and extending from a back leg region to the instep region; and a leg support including: a right leg support (21) disposed inside the leg outer layer of the boot on a right side thereof and extending from the back leg region toward the instep region (6), the right leg support including a right leg tightening structure disposed in close proximity to the instep region; and a left leg support (21) disposed inside the leg outer layer of the boot on a left side thereof and extending from the back leg region toward the instep region (6), the left leg support including a left leg tightening structure disposed in close proximity to the instep region. A snowboard boot according to claim 9, wherein the leg support further comprises a back leg support (21a) bridging the right foot support and the left foot support around a back side of the boot. A snowboard boot according to either of claims 9 or 10, wherein the right leg support comprises a plurality of spaced apart right leg support components (21b) extending toward the instep region (6), and wherein the left leg support comprises a plurality of spaced apart left leg support components (21b) extending toward the instep region (6). A snowboard boot according to claim 11, wherein each of the plurality of right leg support components (21b) and each of the plurality of left leg support components (21b) includes an eyelet (22) positioned in close proximity to the instep region. A snowboard boot according to either one of claims 11 or 12, wherein each of the plurality of right leg support components (21b) and each of the plurality of left leg support components (21b) includes an eyelet (22) formed at a free end thereof.

Inventors: OKAJIMA SHINPEI, OKAJIMA, SHINPEI, Okajima, Shinpei, c/o Shimano Inc.
Applicants: SHIMANO KK, SHIMANO INC.
Application year: 1996
Main classification: A43B5
IPC codes: A43B5, A43B23, A43B7, A43C11