Anti-slip unit and functional shoes including the same

Abstract

An anti-slip unit included in soles of shoes to provide an anti-slip function for the shoes includes a main body including an inner space and a spike through-hole connecting the inner space and the outside, a spike provided in the inner space so as to be movable along the spike through-hole, and a movable member that is provided in the inner space so as to be movable and that moves to allow the spike to be moved. The movable member moves between a first position in which at least part of the spike is concealed in the inner space and a second position in which the spike is exposed outside the main body and an exposed state of the spike is maintained. The spike may be concealed in, or exposed outside, the above-configured anti-slip unit of the present disclosure, and a user may simply and conveniently manipulate the anti-slip unit.

What is claimed is: 
     
         1 . An anti-slip unit included in soles of shoes to provide an anti-slip function for the shoes, the anti-slip unit comprising:
 a main body including an inner space and a spike through-hole configured to connect the inner space and the outside;   a spike provided in the inner space so as to be movable along the spike through-hole; and   a movable member provided in the inner space so as to be movable and configured to move to allow the spike to be moved,   wherein the movable member moves between a first position in which at least part of the spike is concealed in the inner space and a second position in which the spike is exposed outside the main body and an exposed state of the spike is maintained.   
     
     
         2 . The anti-slip unit of  claim 1 , wherein a direction in which the spike is concealed in the inner space is referred to as a concealment direction, and a direction in which the spike is exposed outside the main body is referred to as an exposure direction, the exposure direction being opposite to the concealment direction, and
 wherein the movable member:   in the first position, allows the spike to move in the concealment direction, or does not allow the spike having already moved in the concealment direction to move in the exposure direction, in order to maintain a concealed state of the spike;   allows or forces the spike to move in the exposure direction while the movable member moves from the first position to the second position; and   in the second position, does not allow the spike having already moved in the exposure direction to move in the concealment direction, in order to maintain the exposed state of the spike.   
     
     
         3 . The anti-slip unit of  claim 1 , wherein a direction in which the spike is concealed in the inner space is referred to as a concealment direction, and a direction in which the spike is exposed outside the main body is referred to as an exposure direction, the exposure direction being opposite to the concealment direction,
 wherein the movable member includes a non-contact area located above the spike in the concealment direction with respect to the second position and configured not to make contact with the spike while the spike moves at least a predetermined distance although the spike moves in the concealment direction and a contact area configured to make contact with the spike having already moved in the exposure direction,   wherein the first position, in which the non-contact area is located on the spike, is a position where the spike is allowed to move in the concealment direction through the non-contact area, and   wherein the second position, in which the contact area is located on the spike, is a position where the spike having already moved in the exposure direction is not allowed to move in the concealment direction due to contact with the contact area.   
     
     
         4 . The anti-slip unit of  claim 3 , wherein the movable member makes contact with the spike while moving from the first position to the second position and moves the spike in the exposure direction by pressure according to the contact when making contact with the spike. 
     
     
         5 . The anti-slip unit of  claim 4 , wherein an inclined surface for forcing the spike to move in the exposure direction is formed on at least one of one portion of the spike and one portion of the movable member that make contact with each other while the movable member moves from the first position to the second position, and
 wherein the inclined surface is formed such that part of force exerted on the spike by the movable member during the contact is applied in the exposure direction.   
     
     
         6 . The anti-slip unit of  claim 4 , wherein the movable member has a spike receiving recess formed on one surface facing the exposure direction, and the spike is received in the spike receiving recess when moving in the concealment direction,
 wherein an area adjacent to the spike receiving recess is recessed to form an inclined portion, and   wherein the inclined portion includes:   a first inclined surface configured to make contact with the spike while the movable member moves from the first position to the second position;   a first seating surface on which the spike is seated while the movable member is located in the second position;   a second inclined surface configured to make contact with the spike while the movable member moves from the second position to the third position and configured to further move the spike in the exposure direction than when the movable member is in the second location; and   a second seating surface on which the spike is seated while the movable member is located in the third position;   
     
     
         7 . The anti-slip unit of  claim 3 , wherein an elastic member is provided between the main body and the spike to forcibly move the spike in the concealment direction when the movable member is in the first position, and
 wherein an elastic-member receiving recess is concavely formed on an inner surface facing the concealment direction among inner surfaces of the main body that define the inner space, along a periphery of the spike through-hole, and the elastic member is disposed in the elastic-member receiving recess.   
     
     
         8 . The anti-slip unit of  claim 1 , further comprising:
 a manipulation member configured to move the movable member from the first position to the second position or from the second position to the first position.   
     
     
         9 . The anti-slip unit of  claim 1 , wherein the movable member having a disc shape is provided in the inner space so as to be rotatable about an axis oriented in a direction corresponding to a vertical direction and rotates between the first position and the second position. 
     
     
         10 . The anti-slip unit of  claim 9 , further comprising:
 a manipulation member configured to pass through the main body and coupled with the movable member; and   a fastening screw threaded into the manipulation member and configured to cause the movable member and the manipulation member to be coupled with each other.   
     
     
         11 . The anti-slip unit of  claim 10 , wherein the movable member has a manipulation member receiving hole formed at the center of a surface facing an exposure direction where the center of rotation of the movable member is located and a fastening screw recess formed on a surface facing a concealment direction to connect to the manipulation member receiving hole, the fastening screw being inserted into the fastening screw recess,
 wherein the main body has a manipulation member through-hole through which a manipulation member passes, the through-hole being vertically formed through the main body, and   wherein the manipulation member includes:   a manipulation member body installed in the manipulation member through-hole of the main body so as to be rotatable; and   a manipulation member head connected to one side of the manipulation member body that faces the concealment direction and fixedly inserted into the manipulation member receiving hole of the movable member, the manipulation member head having, in the center, a recess that is open in the concealment direction and to which the fastening screw is threaded.   
     
     
         12 . The anti-slip unit of  claim 11 , wherein the manipulation member body has a wrench recess into which a wrench is inserted, the wrench recess being open in the exposure direction. 
     
     
         13 . Functional shoes for preventing slipping, comprising:
 a sole having a space inside;   a spike provided in the interior of the sole so as to be movable in a vertical direction along a spike through-hole that is formed in the sole to connect the interior of the sole and the outside; and   a movable member provided in the interior of the sole so as to be movable and configured to move to allow the spike to be moved in the vertical direction,   wherein the movable member moves between a first position in which at least part of the spike is concealed in the interior of the sole and a second position in which the spike is exposed outside the sole and an exposed state of the spike is maintained.