초록 ▼

An electronic device and a hinge assembly thereof. The electronic device includes a base, an elastic member, a first cam, a second cam, and a third cam. The elastic member is disposed on the base. The first cam is disposed on the base in a manner such that the first cam is abutted by the elastic me

An electronic device and a hinge assembly thereof. The electronic device includes a base, an elastic member, a first cam, a second cam, and a third cam. The elastic member is disposed on the base. The first cam is disposed on the base in a manner such that the first cam is abutted by the elastic member. The first cam rotates in a first direction and a second direction opposite to the first direction. The second cam is disposed on the base in a manner such that the second cam is abutted by the first cam. When the first cam rotates in the first direction, the second cam rotates along with the first cam. The third cam is disposed on the base in a manner such that the third cam is abutted by the second cam. When the first cam rotates in the second direction, the second cam is blocked by the third cam and does not rotate along with the first cam.

대표청구항 ▼

What is claimed is: 1. A hinge assembly comprising: a base; an elastic member disposed on the base; a first cam disposed on the base in a manner such that the first cam rotates in a first direction and a second direction opposite to the first direction; a second cam disposed on the base in a manne

What is claimed is: 1. A hinge assembly comprising: a base; an elastic member disposed on the base; a first cam disposed on the base in a manner such that the first cam rotates in a first direction and a second direction opposite to the first direction; a second cam disposed on the base in a manner such that the second cam is abutted by the first cam, wherein the first cam and the second cam are arranged such that the first cam and the second cam are engaged and the second cam rotates along with the first cam when the first cam rotates in the first direction; and a third cam disposed on the base in a manner such that the third cam is abutted by the second cam and the elastic member, wherein the second cam and the third cam are arranged such the second and the third cam are engaged and the second cam is blocked by the third cam and does not rotate along with the first cam when the first cam rotates in the second direction, and the third cam does not rotate along with the second cam when the first cam rotates in the first direction. 2. The hinge assembly as claimed in claim 1, wherein the first cam includes a first curved surface at a side abutted by the second cam, and the first curved surface includes a first portion and a second portion parallel to the first portion, and the second cam includes a second curved surface at a side abutted by the first cam, and the second curved surface includes a third portion and a fourth portion parallel to the third portion, and the first portion and the second portion are engaged with the third portion and the fourth portion, and the first cam automatically rotates to a first predetermined angle by the first portion, the second portion, the third portion, and the fourth portion when the first cam rotates to a second predetermined angle in the second direction due to external force. 3. The hinge assembly as claimed in claim 2, wherein the first curved surface further includes a fifth portion, a sixth portion, a seventh portion, and an eighth portion, and the fifth portion is connected to the first portion, and the sixth portion is connected to the second portion and the fifth portion, and the seventh portion is connected to the second portion, and the eighth portion is connected to the first portion and the seventh portion, and the fifth portion and the seventh portion are conjugate to each other with respect to a central axis of the first cam, and the sixth portion and the eighth portion are conjugate to each other with respect to the central axis of the first cam. 4. The hinge assembly as claimed in claim 3, wherein the second curved surface further includes a ninth portion, a tenth portion, an eleventh portion, and a twelfth portion, and the ninth portion is connected to the third portion, and the tenth portion is connected to the fourth portion and the ninth portion, and the eleventh portion is connected to the fourth portion, and the twelfth portion is connected to the third portion and the eleventh portion, and the ninth portion and the eleventh portion are conjugate to each other with respect to a central axis of the second cam, and the tenth portion and the twelfth portion are conjugate to each other with respect to the central axis of the second cam. 5. The hinge assembly as claimed in claim 4, wherein the fifth portion and the seventh portion correspond to the ninth portion and the eleventh portion, and the sixth portion and the eighth portion correspond to the tenth portion and the twelfth portion. 6. The hinge assembly as claimed in claim 2, wherein the first cam further includes a first fixed coupler opposite to the first curved surface. 7. The hinge assembly as claimed in claim 1, wherein the second cam includes a third curved surface at a side abutted by the third cam, and the third curved surface includes a thirteenth portion and a fourteenth portion parallel to the thirteenth portion, and the third cam includes a fourth curved surface at a side abutted by the second cam, and the fourth curved surface includes a fifteenth portion and a sixteenth portion parallel to the fifteenth portion, and the thirteenth portion and the fourteenth portion are engaged with the fifteenth portion and the sixteenth portion, and the first cam and the second cam automatically rotate to a third predetermined angle by the thirteenth portion, the fourteenth portion, the fifteenth portion, and the sixteenth portion when the second cam rotates to a fourth predetermined angle in the first direction by the first cam due to external force. 8. The hinge assembly as claimed in claim 7, wherein the third curved surface further includes a seventeenth portion, an eighteenth portion, a nineteenth portion, and a twentieth portion, and the seventeenth portion is connected to the thirteenth portion, and the eighteenth portion is connected to the fourteenth portion and the seventeenth portion, and the nineteenth portion is connected to the fourteenth portion, and the twentieth portion is connected to the thirteenth portion and the nineteenth portion, and the seventeenth portion and the nineteenth portion are conjugate to each other with respect to a central axis of the second cam, and the eighteenth portion and the twentieth portion are conjugate to each other with respect to the central axis of the second cam. 9. The hinge assembly as claimed in claim 8, wherein the fourth curved surface further includes a twenty-first portion, a twenty-second portion, a twenty-third portion, and a twenty-fourth portion, and the twenty-first portion is connected to the fifteenth portion, and the twenty-second portion is connected to the sixteenth portion and the twenty-first portion, and the twenty-third portion is connected to the sixteenth portion, and the twenty-fourth portion is connected to the fifteenth portion and the twenty-third portion, and the twenty-first portion and the twenty-third portion are conjugate to each other with respect to a central axis of the third cam, and the twenty-second portion and the twenty-fourth portion are conjugate to each other with respect to the central axis of the third cam. 10. The hinge assembly as claimed in claim 9, wherein the seventeenth portion and the nineteenth portion correspond to the twenty-first portion and the twenty-third portion, and the eighteenth portion and the twentieth portion correspond to the twenty-second portion and the twenty-fourth portion. 11. The hinge assembly as claimed in claim 7, wherein the third cam further includes a second fixed coupler opposite to the fourth curved surface. 12. The hinge assembly as claimed in claim 1, wherein the base comprises: a bottom portion on which the elastic member is disposed; and a shaft portion integrally formed with the bottom portion, for passing through the elastic member, the first cam, the second cam, and the third cam. 13. The hinge assembly as claimed in claim 12, wherein the first cam includes a first through hole, and the second cam includes a second through hole, and the third cam includes a third through hole, and the first cam, the second cam, and the third cam are disposed on the bottom portion by the shaft portion passing through the first through hole, the second through hole, and the third through hole. 14. The hinge assembly as claimed in claim 12, wherein the shaft portion includes a fourth through hole, and the first cam includes a fifth through hole corresponding to the fourth through hole, and the base further includes a pin for passing through the fifth hole and the fourth hole so that the first cam is fixed on the base. 15. The hinge assembly as claimed in claim 1, wherein the elastic member is a spring.