Method for securing studded shoes by using the effect of inertia

Abstract

A method for securing studded shoes by using the effect of inertia, wherein a studded shoe, comprising a structure of stud and receptacle combination, the stud including a ground-engaging part. The stud and the receptacle are adapted to be secured together by a threaded connection comprising a bolt (6, 8) on one of the components of the stud and a threaded socket (5, 7) on the receptacle, both adapted such that said bolt (6, 8) can be driven into said threaded socket (5, 7). A securing means of the components serves to become inter-engaged at least when the bolt (6, 8) is fully driven into the threaded socket (5, 7) to resist unscrewing of the components. The securing means comprises at least one locking accessory that fastens in the counterclockwise direction, in an arrangement such that the direction of torque formed by the direction of the inertia in wearer's shoe sole and the center of the threaded connection, and the relative number and/or position of the threads of the threaded connection determine the position and locking direction of the stud relative to the receptacle.

Claims

1. A method for securing studded shoes by using the effect of inertia, comprising: tightly inter-engaging a bolt and a threaded socket by locking accessories by utilizing a fastening torque that is formed by a force applied by a ground to said bolt, wherein the locking accessories include a structure combined by a stud with a receptacle, and the threaded socket fastens the locking accessories in a counterclockwise direction; securing means on an outer side of a left heel of the studded shoes include locking accessories of an engaging portion formed by a threaded stud fastened in a left-hand screwing direction and a receptacle, the securing means on an inner side of the left heel of the studded shoes include locking accessories of an engaging portion formed by a threaded stud fastened in a right-hand screwing direction and a receptacle; and the securing means on an outer side of a right heel of the studded shoes include locking accessories of an engaging portion formed by a threaded stud fastened in the right-hand screwing direction and a receptacle, the securing means on an inner side of the right heel of the studded shoes include locking accessories of an engaging portion formed by a threaded stud fastened in the left-hand screwing direction and a receptacle.

2. The method for securing studded shoes by using the effect of inertia of claim 1, wherein said stud including a ground-engaging part, and said stud and said receptacle being provided and secured to each other by a threaded connection.

3. The method for securing studded shoes by using the effect of inertia of claim 1, wherein said locking accessories have a adapted fastening direction which is the same as the direction of the torque of the force of inertia from the wearer's sole relative to the center of said locking accessories.

4. The method for securing studded shoes by using the effect of inertia of claim 2, wherein said threaded connection comprises said bolt and said threaded socket, said bolt being provided on the component of said stud, said threaded socket on said receptacle, and said bolt being able to be rotationally inserted into said threaded socket correspondingly.

5. The method for securing studded shoes by using the effect of inertia of claim 2, wherein the ground-engaging part of said stud and said receptacle are in a circular or polygonal shape.

6. The method for securing studded shoes by using the effect of inertia of claim 4, wherein at least a said threaded connection of said locking accessories that fasten in a counterclockwise direction is provided on the inner side of the sole of a shoe for right foot.

7. The method for securing studded shoes by using the effect of inertia of claim 4, wherein at least a said threaded connection of said locking accessories that fasten in a counterclockwise direction is provided on the outer side of the sole of a shoe for left foot.

8. The method for securing studded shoes by using the effect of inertia of claim 4, wherein said threaded connection has multi-start screw thread.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a preferred embodiment of the present invention with a method for securing studded shoes by using the effect of inertia;

(2) FIG. 2 is a diagram for studded shoes of the present invention in which a left shoe and a right shoe have opposite fastening directions;

(3) FIG. 3 is a sectional view of the receptacle assembly of the present invention that has a left-hand fastening direction;

(4) FIG. 4 is a sectional view of the receptacle assembly of the present invention that has a right-hand fastening direction;

(5) FIG. 5 is a preferred embodiment of the present invention;

(6) FIG. 6 is another preferred embodiment of the present invention.

DESCRIPTION OF THE REFERENCE SIGNS

(7) 1 upper 2 mid-sole 3 support piece in mid-sole 4 out-sole 5 receptacle (right-hand threaded socket) 6 right-hand threaded studs 7 receptacle (left-hand threaded socket) 8 left-hand threaded studs 9 recess

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(8) FIG. 1 shows an assembly suitable for footwear (not shown) whose wear-resistant components can be changed, comprising a upper 1, a mid-sole 2, a support piece 3 and an out-sole assembly 4, said out-sole assembly 4 comprising right-hand threaded studs 6 and left-hand threaded studs 8; the right-hand threaded studs 6 can be threaded into and received in a right-hand threaded receptacle 5, while the left-hand threaded studs 8 can be threaded into and received in a right-hand threaded receptacle 7; said out-sole assembly can be molded or attached in other manner to the sole or heel of the sport shoes mentioned above.

(9) The right-hand threaded studs 6 or the left-hand threaded studs 8 can be a one-piece or composite component of any metal, ceramics or any plastic material, and has a threaded structure to be fastened; the stud on the sole has a ground-engaging part protruding downward and an external bolt protruding upward; as the receptacle 5 or the receptacle 7 should work in accordance with the orientation of the sole and the stud, the direction of the stud inside the receptacle is the first step of the method herein.

(10) In a normal gait cycle, the foot begins to engage the ground at the outer rim or the middle of the heel, such engagement shifts swiftly toward the inside, then, along a diagonal line of the sole, gradually swifts toward the outside of the front of the sole, and shifts again toward the inside, and, near the end of the movement, finally the foot disengages with the ground at the inner edge of the thumb or middle part of the front sole. It is clear from the transmission track of the force mentioned above that the torque formed by the force applied by the ground on the outer side of the left heel relative to the center of the assembly of the left-hand threaded studs 8 and the receptacle 7 is in a left-hand screwing direction; hence, the locking means on the outer side of the left heel includes locking accessories of an engaging portion formed by the left-hand threaded studs 8 fastened in the left-hand screwing direction and a receptacle 7, wherein this locking means ensures that the studs on the outer side of the left heel can be automatically screwed tightly in the left-hand screwing direction by utilizing the force from the ground and cannot be unscrewed.

(11) In contrast to the left-hand screwing locking means on the outer side of the left heel, the torque formed by the force applied by the ground on the inner side of the left heel relative to the center of the assembly of the right-hand threaded studs 6 and the receptacle 5 is in a right-hand screwing direction; hence, the locking means on the inner side of the left heel includes locking accessories of an engaging portion formed by the right-hand threaded studs 6 fastened in the right-hand screwing direction and the receptacle 5, wherein the locking means also ensures that the studs can be automatically screwed tightly in the right-hand screwing direction by utilizing the force from the ground and cannot be unscrewed.

(12) It becomes clear by this principle that if any stud needs to be provided on the outer side of the front of a left-foot sole, it should at least include locking means that can be automatically screwed tightly in a left-hand screwing direction and cannot be unscrewed, whilst, if any stud needs to be provided on the inner side of the front of a left-foot sole, it should at least include locking means that can be automatically screwed tightly in a right-hand screwing direction and cannot be unscrewed.

(13) When the studs on the outer side of the heel are made of selected harder materials like metal or ceramics, the material of the mid-sole 2 in the corresponding area over it can be selected to be a softer and more elastic foam if the material of the mid-sole 2 is flexible foam, while, if a flexible material, such as plastic, that is not wear-resistant is selected as the material for the studs on the inner side, the material of the mid-sole 2 in the corresponding area over it can be selected to be a harder foam. Such arrangement will allow better balanced status, give the wearer better stability when walking.

(14) If the mid-sole 2 uses a material that is flexible and of the design of highly deformable hollow framework, such as air cushion, a recess 9 that allows support pieces 3 inside it can be provided under the air cushion. When the material selected for the stud on the outer side of the heel is a harder material, such as metal or ceramic, the air cushion recess 9 in the corresponding area over the stud can select softer support piece 3 to be inserted or have no support piece. If the material selected for the stud on the inner side is a non-wear-resistant and flexible material, such as plastic, the air cushion recess 9 in the corresponding area over the stud can select harder support piece 3 to be inserted. Such arrangement will provide better balanced status, which not only gives the wearer better stability when walking but also allows the air cushion over the stud to be compressed and deformed as a result of the stud of hard material on the outer side squeezing the air cushion when the outer side of the heel engages the ground, in turn, causing a secondary effect of spring. That, providing enhanced damping, further improves the energy recovery rate of the air cushion from 44% in the previous deflated status to 60%, and the energy recovery rate from 54% after inflation at 10 PSI to 64%, boasting a major discovery in the improvement of sole functions.

(15) FIG. 2 is the diagram showing that the studs on the outer side of heel of the present invention have opposite fastening direction between the right and left shoes; the fastening direction on the right shoe is clockwise, i.e., right-hand screwing direction, and, on the left shoe, counterclockwise, i.e., left-hand screwing direction.

(16) FIG. 3 is a sectional view of a receptacle assembly of the present invention that has a left-hand fastening direction.

(17) FIG. 4 is a sectional view of a receptacle assembly of the present invention that has a right-hand fastening direction.

(18) FIG. 5 shows a preferred embodiment of the invention, which is the out-sole of an article of footwear that allows changing wear-resistant component, and in which the studs can be provided on both the inner and outer sides of the heels and their materials and quantities can be adjusted according to the shoe wearer's gait. For example, for a person who walks out-toeing, as generally his shoes are worn more quickly on the outer side of the heel than the inner side, more studs are provided and their material can be metal or ceramics which is more wear-resistant; in contrast, as the sole is worn less quickly on the inner side, less studs can be provided on the inner side, using any material, e.g., plastic, that is less wear-resistant. Whilst, for a person who walks in-toeing, as generally his shoes are worn more quickly on the inner side of the heel than the outer side, metal or ceramic materials that are more wear-resistant are used, while the use of less wear-resistant materials like plastics can be considered on the outer side of the heel. Also, as the studs can be changed, it is made possible, by changing new studs, to avoid knee and spinal or sole diseases caused by the shift of the pressure on the sole and of the body's center of gravity because of the worn sole, and to prolong the lifespan of the shoes under proper use.

(19) FIG. 6 shows an embodiment of the present invention, in which studs are provided only on the outer side of the sole on both the right and left shoes, yet, their quantities and material can be adjusted according to wearer's gait. Because the studs on the outer side exceed the sole in height, causing the outer side of the sole higher than the inner side, which in turn causes the body's center of gravity to lean toward inside and the center of pressure on the sole to shift toward inside, this is generally used in rehabilitation and physiotherapy to relieve the pain on degenerative arthritis patients with impaired knee on the inner side and to decrease the contracting torque on the knees when the patient is walking. Also, metal or ceramic material that is more wear-resistant is used on the outer side of the heel where the sole is generally worn more quickly. Again, as the studs can be changed, it is made possible by changing stud heights to achieve the benefit of specifically decreasing the contracting torque on the knees and to prevent the knee and spinal or sole diseases caused by the shift of the pressure on the sole and of the body's center of gravity because of the worn sole; it is also possible to change the stud height as appropriate to the improvement on the degenerative arthritis patient. Changeable studs further help prolong the lifespan of shoes in proper use.