IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0457923
(2003-06-09)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Mission Hills Investment Corporation
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
16 인용 특허 :
12 |
초록
▼
A foldable stroller includes two locking devices for locking a frame body in an extended position, and a twist actuator mounted on and rotatable relative to a grip and having two cam paths disposed on an inner shell surface thereof. Two cam followers are interposed between the grip and the twist act
A foldable stroller includes two locking devices for locking a frame body in an extended position, and a twist actuator mounted on and rotatable relative to a grip and having two cam paths disposed on an inner shell surface thereof. Two cam followers are interposed between the grip and the twist actuator, and have cam surfaces to confront and slidably engage the cam paths so as to move the cam followers along an axis when the twist actuator is rotated. Two keys are secured by the cam followers and extend radially and inwardly to be inserted into and slidable along two keyways formed in the grip. Two pulling cords respectively connect the keys with the locking devices to pull the locking devices so as to unlock the frame body when the cam followers are moved. A retaining member is disposed to prevent movement of the cam followers, and is manually operable to move radially.
대표청구항
▼
1. A foldable stroller comprising:a frame including a frame body configured to be foldable between an extended position and a collapsed position, a handle having a pair of side handle portions which are connected to said frame body, which are spaced apart from each other in an axial direction, and w
1. A foldable stroller comprising:a frame including a frame body configured to be foldable between an extended position and a collapsed position, a handle having a pair of side handle portions which are connected to said frame body, which are spaced apart from each other in an axial direction, and which extend in an upright direction transverse to the axial direction, and a grip having left and right ends which are opposite to each other in the axial direction and which are connected to said side handle portions distal from said frame body, and an outer surrounding surface which surrounds an axis in the axial direction to define therein a passageway along the axis, and which has two keyways that are displaced from each other in the axial direction and that extend radially to be communicated with said passageway; a pair of locking devices mounted on said frame body to lock said frame body in the extended position, and disposed respectively proximate to said side handle portions of said handle; a twist actuator mounted on and disposed radially and outwardly of said outer surrounding surface of said grip, and rotatable relative to said grip about the axis between a locked position and an unlocked position, said twist actuator having inner and outer shell surfaces opposite to each other in radial directions relative to the axis, a through hole which extends from said inner shell surface through said outer shell surface, and two cam paths which are disposed on said inner shell surface and which are displaced from each other in the axial direction; left and right cam followers interposed between said outer surrounding surface of said grip and said inner shell surface of said twist actuator, and spaced apart from each other in the axial direction, each of said left and right cam followers having a key positioning end and a cam surface which is opposite to said key positioning end in the axial direction, and which confronts and slidably engages a respective one of said cam paths such that when said twist actuator is rotated about the axis from the locked position to the unlocked position, each of said left and right cam followers is moved along the axis from a first position to a second position; a pair of keys disposed to be secured by said key positioning ends of said left and right cam followers, respectively, and to extend towards the axis so as to be inserted into and slidable along said keyways, respectively, when said left and right cam followers are respectively moved between the first and second positions; a pair of pulling cords disposed to pass through said passageway, each of said pulling cords having first and second cord ends which are respectively connected to a respective one of said keys and a respective one of said locking devices, such that when said left and right cam followers are moved from the first position to the second position, each of said locking devices is jerked by the respective one of said pulling cords to unlock said frame body so as to permit said frame body to be placed in the collapsed position; and a retaining member disposed to be sleeved on said grip and movable radially of said left and right cam followers between actuable and depressed positions, said retaining member having a retaining portion which is disposed outboard to one of said key positioning ends to prevent said key positioning ends of said left and right cam followers from moving towards the second position when said retaining member is in the actuable position, and an operating portion which is radially opposite to said retaining portion and which extends outwardly of said twist actuator through said through hole to be operated manually to move said retaining member to the depressed position so as to place said retaining portion radially and outwardly of said key positioning ends, thereby permitting rotation of said twist actuator from the locked position to the unlocked position. 2. The foldable stroller according to claim 1, further comprising a biasing member disposed between said inner shell surface of said twist actuator and said retaining member so as to bias said retaining member towards the actuable position.3. The foldable stroller according to claim 2, wherein each of said cam paths extends along a first winding route, and said cam surface of each of said left and right cam followers extends along a second winding route to slidably engage the respective one of said cam paths.4. The foldable stroller according to claim 2, wherein said key positioning end of each of said left and right cam followers has two diametrically opposite holes such that a respective one of said keys is inserted into said holes so as to be secured by said key positioning end.5. The foldable stroller according to claim 4, wherein said key positioning ends of said left and right cam followers are disposed outboard to said cam surfaces of said left and right cam followers such that when each of said left and right cam followers is moved from the first position to the second position, said cam surfaces of said left and right cam followers are moved away from each other,said first cord end of one of said pulling cords being connected to one of said keys which is secured to said left cam follower such that said second cord end of said one of said pulling cords extends beyond said right end of said grip so as to be connected to a respective one of said locking devices, said first cord end of the other one of said pulling cords being connected to the other one of said keys which is secured to said right cam follower such that said second cord end of said other one of said pulling cords extends beyond said left end of said grip so as to be connected to a respective one of said locking devices. 6. The foldable stroller according to claim 4, wherein said key positioning ends of said left and right cam followers are disposed inboard to said cam surfaces of said left and right cam followers, such that when each of said left and right cam followers is moved from the first position to the second position, said cam surfaces of said left and right cam followers are moved towards each other.7. The foldable stroller according to claim 1, wherein said twist actuator is of tubular form, and is constituted by upper and lower halves which are in symmetry relative to the axis.8. The foldable stroller according to claim 1, wherein each of said locking devices includesa first coupling member mounted on said frame body, and having a first coupling wall which faces in the upright direction, a second coupling member mounted on a respective one of said side handle portions, and having a second coupling wall which abuts against said first coupling wall to lock said frame body in the extended position, a pin connected to said second cord end of a respective one of said pulling cords and secured to said second coupling member such that when said left and right cam followers are moved from the first position to the second position, said second coupling member is pulled by said second cord end of the respective one of said pulling cords to enable said second coupling wall to disengage from said first coupling wall, thereby permitting said frame body to be placed in the collapsed position, and a biasing member disposed to bias said second coupling wall to abut against said first coupling wall.
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