DENTAL COUPLING MEMBER AND ORAL APPLIANCE

1 . A dental coupling member attached to upper and lower oral appliances to couple the upper and lower oral appliances, and to regulate displacement of the lower oral appliance to rear side when a mouth is closed or opened, comprising:

an outer having a cylindrical portion which is a cylindrical member having a through hole, wherein the outer can be attached to one oral appliance of the upper and lower oral appliances;

an inner having a rod-shaped insertion portion to be inserted into an interior of the cylindrical portion and slidably held by the outer, wherein the inner can be attached to the other oral appliance of the upper and lower oral appliances; and

a stopper adjustably positioned inside the cylindrical portion, wherein the stopper serve to limit a slide width of the insertion portion inside the cylindrical portion by adjustment of its position along the axial direction of the cylindrical portion.

2 . The dental coupling member according to claim 1 , wherein the outer has a female screw portion inside of the cylindrical portion, and the stopper has a male screw portion which is screwed into the female screw portion, and

wherein the position of the stopper is adjusted along the axial direction of the outer by a rotation of the male screw portion screwed into the female screw portion.

3 . The dental coupling member according to claim 1 , further comprising a cylindrical sleeve slidably inserted into an interior of the cylindrical portion,

wherein the insertion portion of the inner is slidably inserted into the interior of the sleeve thereby held by the outer, and

the stopper is adjusted its position inside the cylindrical portion and serves to limit the slide width of the insertion portion by limiting the slide width of the sleeve inside the cylindrical portion.

4 . The dental coupling member according to claim 1 , further comprising a cylindrical sleeve slidably inserted into an interior of the cylindrical portion,

wherein the insertion portion of the inner is slidably inserted into the interior of the sleeve and held by the outer, and

the stopper adjusted its position inside the sleeve and serve and serves to limit the slide width of the insertion portion inside the sleeve.

5 . A dental coupling member attached to upper and lower oral appliances to couple the upper and lower oral appliances, and to regulate displacement of the lower oral appliance to rear side when a mouth is closed or opened, comprising:

an outer having a cylindrical portion which is a cylindrical member having a through hole, wherein the outer can be attached to one oral appliance of the upper and lower oral appliances;

a sleeve having a main body portion which is a cylindrical member having an insertion hole and a female screw formed on an inner surface of the insertion hole, the sleeve being slidably inserted into an interior of the through hole of the cylindrical portion; and

an inner having a rod-shaped insertion portion on which a male screw which can be screwed into the female screw is formed, wherein the rod-shaped insertion portion is held by the sleeve by a threading of the male screw to the female screw, and wherein the inner can be attached to the other oral appliance of the upper and lower oral appliances,

wherein the cylindrical portion has a small diameter portion in which a diameter of the through hole is reduced, and

wherein the sleeve has a pair of front and rear increased diameter portions each having a larger diameter than the small diameter portion, and when the sleeve is inserted into the interior of the cylindrical portion, one increased diameter portion of the pair of increased diameter portions is disposed on an inner side with respect to the small diameter portion, and the other increased diameter portion of the pair of increased diameter portions is disposed on an outer side with respect to the small diameter portion, respectively.

6 . The dental coupling member according to claim 5 , wherein the sleeve is rotatably inserted into the inside of the through hole of the cylindrical portion.

7 . The dental connecting member according to claim 5 , wherein the other increased diameter portion of the sleeve has a larger diameter than a diameter of the through hole of the cylindrical portion.

8 . A dental coupling member attached to upper and lower oral appliances to couple the upper and lower oral appliances, and to regulate displacement of the lower oral appliance to rear side when a mouth is closed or opened, comprising:

an outer having a cylindrical portion which is a cylindrical member having a through hole inside which a female screw portion is disposed, wherein the outer can be attached to one oral appliance of the upper and lower oral appliances; and

an inner having a rod-shaped insertion portion on which a male screw which can be screwed into the female screw is formed, wherein the rod-shaped insertion portion is held by the outer by the threading of the male screw to the female screw, and wherein the inner can be attached to the other oral appliance of the upper and lower oral appliances,

wherein the insertion portion has an elastic portion served to expand and contract the insertion portion inserted into an interior of the cylindrical portion in the axial direction of the cylindrical portion.

9 . The dental coupling member according to claim 8 , wherein the elastic portion is disposed at a position connecting a root portion and a distal end portion of the rod-shaped insertion portion, and

wherein the elastic portion expands and contracts the insertion portion such that, when the insertion portion is inserted into the inside of the cylindrical portion, the distal end portion is displaced toward the root portion side.

10 . The dental coupling member according to claim 8 , wherein the elastic portion is a compression spring member which is screwed into the female screw and has a pitch width different from that of the male screw.

11 . The dental coupling member according to claim 10 , wherein the elastic portion is disposed at a distal end of the insertion portion.

12 . The dental coupling member according to claim 8 , wherein the elastic portion is disposed at an intermediate portion of the insertion portion.

13 . The dental coupling member according to claim 8 , wherein the elastic portion is integrated with the inner.

14 . The dental coupling member according to claim 8 , further comprising a sleeve having a main body portion which is a cylindrical member having an insertion hole and a female screw formed on an inner surface of the insertion hole, wherein the sleeve is slidably inserted into an interior of the cylindrical portion, and

wherein the female screw is formed on an inner surface of the insertion hole.

15 . An oral appliance, comprising:

upper and lower oral appliances, and

a pair of dental coupling members according to claim 1 attached to left and right sides of the upper and lower oral appliances to connect the upper and lower oral appliances.

16 . An oral appliance, comprising:

upper and lower oral appliances, and

a pair of dental coupling members according to claim 5 attached to left and right sides of the upper and lower oral appliances to connect the upper and lower oral appliances.

17 . An oral appliance, comprising:

upper and lower oral appliances, and

a pair of dental coupling members according to claim 8 attached to left and right sides of the upper and lower oral appliances to connect the upper and lower oral appliances.