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Disclosed are a foldable joint having an unfolded position and a folded position, and a stroller having the foldable joint. The foldable joint comprises a base rod (1), a first rotary rod (2) and a second rotary rod (3), wherein one end portion of the base rod (1), one end portion of the first rotar

Disclosed are a foldable joint having an unfolded position and a folded position, and a stroller having the foldable joint. The foldable joint comprises a base rod (1), a first rotary rod (2) and a second rotary rod (3), wherein one end portion of the base rod (1), one end portion of the first rotary rod (2) and one end portion of the second rotary rod (3) are rotationally connected to one another, a slider (4) is slidably arranged on the base rod (1), a driving part (41) is connected to the slider (4), a first guide portion (21) is arranged on the first rotary rod (2), a second guide portion (31) is arranged on the second rotary rod (3), and the driving part (41) is slidably fitted with the first guide portion (21) and the second guide portion (31) respectively. In the process of unfolding or folding the foldable joint, the driving part (41) moves relative to the first guide portion (21) and the second guide portion (31) simultaneously, and the driving part (41) moves along with the slider (4) relative to the base rod (1) such that the three components, i.e. the first rotary rod (2), the second rotary rod (3) and the base rod (1) are rotated relative to one another.

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1. A foldable joint with an unfolded position and a folded position, comprising a base rod, a first rotary rod and a second rotary rod, two end portions of an end portion of the base rod, an end portion of the first rotary rod and an end portion of the second rotary rod are rotationally connected to

1. A foldable joint with an unfolded position and a folded position, comprising a base rod, a first rotary rod and a second rotary rod, two end portions of an end portion of the base rod, an end portion of the first rotary rod and an end portion of the second rotary rod are rotationally connected to each other, and the rest one is rotationally connected with at least one of the two end portions, a slider is slidably arranged on the base rod, wherein a driving part is connected to the slider, a first guide portion is arranged on the first rotary rod, a second guide portion is arranged on the second rotary rod, and the driving part is slidably fitted with the first guide portion and the second guide portion respectively; in the process of unfolding or folding the foldable joint, the driving part moves relative to the first guide portion and the second guide portion simultaneously, and the driving part moves along with the slider relative to the base rod such that the first rotary rod, the second rotary rod and the base rod are rotated relative to one another;wherein the first guide portion forms a first guide portion projection on the base rod, the second guide portion forms a second guide portion projection on the base rod, the slider forms a slider projection on the base rod, and when the foldable joint is at the unfolded position or the folded position, the first guide portion projection and the second guide portion projection are located at two sides of the slider projection respectively. 2. The foldable joint according to claim 1, wherein the distance between the first guide portion and a rotation center of the first rotary rod from one end to the other end of the first guide portion gets more and more short, and the first guide portion deviates from a radial direction of a circle having a rotation center of the first rotary rod as the center; the distance between the second guide portion and a rotation center of the second rotary rod from one end to the other end of the second guide portion gets more and more short, and the second guide portion deviates from a radial direction of a circle having a rotation center of the second rotary rod as the center; when the foldable joint is at the unfolded position, the driving part is located at the one end of the first guide portion and the one end of the second guide portion respectively, and when the foldable joint is at the folded position, the driving part is located at the other end of the first guide portion and the other end of the second guide portion respectively. 3. The foldable joint according to claim 1, wherein the slider is slidably arranged on the base rod along a linear track. 4. The foldable joint according to claim 1, wherein the slider is slidably connected to the base rod along a radial direction of a circle having a rotation center of the base rod as the center. 5. The foldable joint according to claim 1, wherein a sliding direction of the slider corresponds to the length direction of the base rod. 6. The foldable joint according to claim 1, wherein the end portion of the base rod, the end portion of the first rotary rod and the end portion of the second rotary rod are pivotally connected via a first pivot. 7. The foldable joint according to claim 1, wherein the first guide portion and the second guide portion are arc-shaped respectively. 8. The foldable joint according to claim 1, wherein the first guide portion and the second guide portion are guide slots respectively, and the driving part is inserted into the two guide slots. 9. The foldable joint according to claim 1, wherein the first guide portion and the second guide portion are protruding ridges respectively, and two end portions of the driving part have grooves respectively, each of the grooves is slidably fitted with corresponding one of two protruding ridges. 10. The foldable joint according to claim 1, wherein a guide slot is opened on the slider, and the length direction of the guide slot is consistent with the sliding direction of the slider; a guide protrusion is provided on the base rod, and the guide protrusion is slidably inserted into the guide slot. 11. A stroller comprising the foldable joint according to claim 1, wherein the stroller further comprises a front wheel assembly provided at another end portion of the first rotary rod and a rear wheel assembly provided at another end portion of the base rod, and a push handle is provided at another end portion of the second rotary rod.