Underpants

Abstract

Disclosed herein are underpants, which are configured by combining ergonomic three dimensional patterns with the basic function as underwear, thus allowing a wearer to have an effect of lifting and shaping the buttocks and feel comfortable. The underpants of the present invention are characterized in that several front and rear pieces having different patterns, which are produced through cutting a fabric sheet that is stretchable in one way or in two ways such that the pieces have predetermined sizes and different shapes corresponding to respective parts of the body of a wearer in consideration of both the body line of the wearer and the movement of the muscles of the wearer's body during active movement of the wearer, are sewn together, so that, when the wearer moves, the force caused by the movement uniformly and diagonally acts in the underpants upwards and outwards from the lower portion of a vertical central axis in a symmetrical Y-shaped or V-shaped line of action due both to the stretchable directions in the pattern pieces and to the movement of the parts of the wearer's body.

1 . Underpants comprising a waist band surrounding the waist of a wearer and defining an upper opening having a predetermined size; and an underpants body comprising front and rear sheet parts formed through cutting into predetermined sizes, the front and rear sheet parts being sewn along a lower edge of the waist band and sewn together along edges thereof into a single body, with two lower openings having predetermined sizes defined at respective opposite locations on the lower end of the underpants body, wherein
 the front sheet part comprises: a plurality of fabric pattern pieces having pre-determined sizes and different shapes, which are formed through cutting a fabric sheet such that the pattern pieces are stretchable in one way or in two ways, wherein the fabric pattern pieces of the front sheet part comprise: one-way stretchable left/right-upper-front pieces, which are not stretchable in upward and outward diagonal directions from a lower portion of a vertical central axis in the front sheet part and are sewn to left/right-upper-rear pieces, which extend forwards from a rear side of the underpants, using left/right mesh tapes, which have predetermined widths and air permeability and are stretchable in two ways; left/right scrotal pieces, which are coupled together into a three-dimensional structure and are stretchable in two ways and are sewn to the left/right-upper-front pieces using a middle mesh tape, which is curved downwards to form a U-shaped appearance and has air permeability and is stretchable in two ways; and left/right-lower-front pieces, which have two-ply structures and no rubber band and are stretchable in two ways and are sewn to a central-lower piece, which is stretchable in two ways, at a lower end of the front sheet part, in which the left/right scrotal pieces are sewn to the left/right-upper-front pieces using the middle mesh tape, wherein a scrotal pattern part, which comprises both the left/right scrotal pieces and the middle mesh tape, is inclined to the left or right from the vertical central axis at a pre-determined angle of inclination and the front sheet part is connected to the waist band, which is designed as a curved shape to lower a middle portion thereof rather than left and right side portions when a person wears the underpants, and a force diagonally acts in the underpants upwards and outwards from the lower portion of the vertical central axis in a V-shaped line of action due to both movements of parts of the body of the wearer and the directions of actions relatively acting in the respective pattern pieces, which are the left/right mesh tapes connected both to the one-way stretchable left/right-upper-front pieces and to the left/right-upper-rear pieces extending forwards from the rear side of the underpants such that the left/right mesh tapes release transmission of lifting and shaping functional strong pressure to the front sheet part; the middle mesh tape releasing both the lifting and shaping functional pressure reduced by the left/right mesh tapes and pressure acting both on the left/right-upper-front pieces and on the left/right scrotal pieces, thus preventing the pressure from being strongly exerted on a scrotal part of the wearer; the central-lower piece connected to the middle mesh tape; and the left/right-lower-front pieces symmetrically connected to left and right sides of the central-lower piece.   
   
   
       2 . The underpants according to  claim 1 , wherein the rear sheet part comprises: a plurality of fabric pattern pieces having predetermined sizes and different shapes, which is formed through cutting a fabric sheet such that the pattern pieces are stretchable in one way, wherein the fabric pattern pieces of the rear sheet part comprise: the left/right-upper-rear pieces connected to the left/right mesh tapes sewn to the left/right-upper-front pieces; and left/right-lower-rear pieces and left/right middle pieces symmetrically sewn to lower ends of the left/right-upper-rear pieces such that they are stretchable in one predetermined way, wherein the rear sheet part is connected to the waist band, which is designed as a curved shape to lower a middle portion thereof rather than at the left and right side portions when a person wears the underpants, and a force diagonally acts in the rear sheet part upwards and outwards from a lower portion of a vertical central axis in the rear sheet part in either a symmetrical Y-shaped or a symmetrical V-shaped line of action due to both movements of parts of the body of the wearer and the directions of actions relatively acting in the respective pattern pieces, which are the left/right-upper-rear pieces and the left/right-lower-rear pieces, which are not stretchable in upward and outward diagonal directions from the lower portion of the vertical central axis; and the left/right middle pieces, which are not stretchable in upward directions from the lower portion of the vertical central axis. 
   
   
       3 . The underpants according to  claim 1 , wherein the scrotal pattern part, which comprises both the left/right scrotal pieces and the middle mesh tape, is inclined to the left from the vertical central axis at an angle (θ1) of 40°˜85°. 
   
   
       4 . The underpants according to  claim 1 , wherein the scrotal pattern part, which comprises both the left/right scrotal pieces and the middle mesh tape, is inclined to the right from the vertical central axis at an angle (θ2) of 95°˜140°. 
   
   
       5 . The underpants according to  claim 2 , wherein the left/right-upper-rear pieces, the left/right-lower-rear pieces and the left/right middle pieces, which are connected to the left/right mesh tapes sewn to the left/right-upper-front pieces, are symmetrically connected to each other such that they are not stretchable in the upward and outward diagonal directions from the lower portion of the vertical central axis, wherein, when the underpants are worn by a person, a force diagonally acts in the rear sheet part upwards and outwards from the lower portion of the vertical central axis in the rear sheet part in either the symmetrical Y-shaped or the symmetrical V-shaped line of action due to both the movements of the parts of the wearer's body and the directions of actions relatively acting in the respective pattern pieces, such that the component forces are uniform and symmetrical with each other at a leftward angle (θ3) of 10°˜75° and at a rightward angle (θ4) of 105°˜170°.