Patent ID: 7234887

Claim:
A coupling device for an artificial model, comprising a male joining part; and a female joining part, being joined to the male joining part tightly; wherein, the male joining part further comprises: a first base disk with a first hollow center; a first front positioning plate with a second hollow center, having a central circular protrusion part; a rear positioning lock plate with a third hollow center; a plurality of first bolts, fastening the base disk, the front positioning plate and the rear positioning lock plate together; and an insertion member, passing through the base disk, the front positioning plate, the rear positioning lock plate via the hollow centers; and the female joining part further comprises; a second base disk; a second front positioning plate; a second rear positioning lock plate; and a plurality of second bolts, fastening the second base disk, the second front positioning plate and the second rear positioning lock plate tighter; characterized in that the insertion member is composed of an insert head, a pin, an adjustment bolt, a first elastic body and a covering cap with the insert head having a conical shape and an elongated flat part at a bottom thereof; the pin is inserted into the insert head along a radial direction of the insert head and passing through an axis of the insert head to form a shape of cross; the second hollow center has a shape corresponding to the elongated flat part of the insert head such that the elongated flat part of the insert head can fit with the second hollow center after being inserted into the second hollow center with the adjustment bolt passing through the cap and the first elastic body before engaging with the bottom of the insert head; the second front positioning plate at a center thereof has a hollow part with a plurality of equidistant radial grooves and two opposite ones of the radial grooves are pierced with the pin; and a radial recess is disposed between two neighboring ones of the radial grooves respectively; whereby, the male joining member and the female joining member can be joined to each other tightly and be inserted into each other for achieving a purpose of positioning.