Baby swing

1. A baby swing comprising:

a frame;

a supporting device pivotally connected to the frame, the supporting device having a pivot post, a plurality of first engaging members formed on a periphery of the pivot post, and an arc-shaped guiding groove formed around the pivot post; and

a seat having a mounting structure pivotally mounted on the pivot post and a second engaging member disposed in the mounting structure and capable of moving between an engaging position and a releasing position, the mounting structure having a guiding portion slidably disposed in the arc-shaped guiding groove, the arc-shaped guiding groove cooperating with the guiding portion to restrict a rotation range of the seat about the pivot post, the rotation range being smaller than 360 degrees;

wherein when the second engaging member is located at the engaging position, the second engaging member engages one of the first engaging members so that the seat is retained relative to the supporting device; when the second engaging member is located at the releasing position, the second engaging member disengages from the first engaging member so that the seat is allowed to rotate relative to the supporting device.

2. The baby swing of claim 1 , wherein a first pivot hole is formed on the mounting structure, a second pivot hole is formed on the pivot post, the seat further comprises a connecting member, and the connecting member passes through the first pivot hole and the second pivot hole so as to pivotally mount the seat on the pivot post.

3. The baby swing of claim 1 , wherein the seat further comprises a spring member disposed between the mounting structure and the second engaging member, the spring member bias the second engaging member toward to engage one of the first engaging members.

4. The baby swing of claim 1 , wherein the second engaging member has a guiding track, the mounting structure has a guiding rib disposed in the guiding track, and the guiding track cooperates with the guiding rib to guide the second engaging member to move along a movement direction.

5. The baby swing of claim 1 , wherein the supporting device comprises two hanger arms pivotally connected to the frame symmetrically.

6. The baby swing of claim 5 , wherein the supporting device further comprises a base mounted on the two hanger arms, the pivot post and the arc-shaped guiding groove are formed on the base.

7. The baby swing of claim 1 , wherein each of the first engaging members has a taper or arc shape and an engaging end of the second engaging member, which engages the first engaging member, also has a taper or arc shape correspondingly.

8. The baby swing of claim 1 , wherein each of the first engaging member is a recess and the second engaging member is a plunger that is biased toward to engage with the recess.

9. The baby swing of claim 5 , wherein the supporting device further comprises a base mounted on the two hanger arms, the pivot post is a cylinder formed at the base, the seat comprises a circular pivot seat to couple with the pivot post.

10. A baby swing comprising:

a frame;

a supporting device pivotally connected to the frame, the supporting device having a pivot post an arc-shaped guiding groove;

a seat pivotally mounted on the pivot post of the supporting device, the seat having a guiding portion slidably disposed in the arc-shaped guiding groove, the arc-shaped guiding groove cooperating with the guiding portion to restrict a rotation range of the seat about the pivot post, the rotation range being smaller than 360 degrees; and

an engaging device comprising a plurality of first engaging members at one of the supporting device and the seat and a second engaging member at another one of the supporting device and the seat;

wherein the seat is rotated relative to the supporting device between a first position and a second position and will be retained at the first position or the second position when the second engaging member is engaged with one of the first engaging members.

11. The baby swing of claim 10 , wherein the first engaging member is a recess and the second engaging member is a plunger that is biased toward to engage with the recess.

12. The baby swing of claim 11 , wherein the supporting device has a pivot post and the seat has a pivot seat for pivotally coupling with the pivot post, the recess is formed on a periphery of the pivot post.

13. The baby swing of claim 10 , wherein the supporting device has a cylindered pivot post and the seat has a circular pivot seat for coupling with the pivot post, the engaging device is mounted between the pivot post and the pivot seat.

14. The baby swing of claim 13 , wherein the plurality of first engaging members is formed at the pivot post.

15. The baby swing of claim 10 , wherein each of the first engaging members has a taper or arc shape, and the second engaging member comprises an engaging end that has a taper or arc shape correspondent to the first engaging member, when the seat rotates relative to the supporting device, the second engaging member is pressed toward to a releasing position by the first engaging member.