IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0155400
(2011-06-08)
|
등록번호 |
US-8430420
(2013-04-30)
|
발명자
/ 주소 |
- Chen, Shun-Min
- Cui, Zong-Wang
|
출원인 / 주소 |
- Wonderland Nurserygoods Company Limited
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
7 |
초록
▼
A security device for preventing unexpected folding and a child stroller therewith are disclosed. The security device uses a seat-plate locking part disposed on a seat plate to allow or constrain the folding of a rear leg assembly and a front leg assembly of the child stroller according to whether a
A security device for preventing unexpected folding and a child stroller therewith are disclosed. The security device uses a seat-plate locking part disposed on a seat plate to allow or constrain the folding of a rear leg assembly and a front leg assembly of the child stroller according to whether a child is sitting on the seat plate. When a child is sitting on the seat plate, the folding of the child stroller cannot be performed even though a frame positioning device is unlocked. Therefore, the invention can prevent a child sitting on the seat plate of the child stroller from getting hurt due to an unexpected folding of the child stroller.
대표청구항
▼
1. A security device for preventing unexpected folding for a child stroller, the child stroller comprising a side support assembly, a rear leg assembly, a frame positioning device, a front leg assembly, and a chair assembly, the rear leg assembly and the side support assembly being pivotally connect
1. A security device for preventing unexpected folding for a child stroller, the child stroller comprising a side support assembly, a rear leg assembly, a frame positioning device, a front leg assembly, and a chair assembly, the rear leg assembly and the side support assembly being pivotally connected by the frame positioning device, the front leg assembly and the rear leg assembly being pivotally connected, the chair assembly comprising a seat tube and a seat plate, the seat tube being mounted on the frame positioning device, the security device comprising: a sleeve, the seat plate being disposed on the sleeve, the sleeve being sleeved on the seat tube in a slidable way and being pivotally connected to the front leg assembly, the sleeve having a first hole, the seat tube having a second hole, the first hole being substantially aligning with the second hole when the child stroller is unfolded;a seat-plate locking part, movably disposed on the seat plate, the seat-plate locking part having an end portion; andan elastic restore part, connected to the seat-plate locking part, when the first hole is substantially aligning with the second hole and the seat plate is weighted, the end portion being engaged in the first hole and the second hole simultaneously to constrain the sleeve and the seat tube from moving relatively; when the seat plate is un-weighted, the elastic restore part driving the seat-plate locking part to disengage the end portion from the second hole such that the sleeve is capable of moving relatively to the seat tube. 2. The security device of claim 1, wherein the seat plate forms an accommodating space, the seat-plate locking part is disposed in the accommodating space, and the elastic restore part abuts against the seat-plate locking part and the sleeve respectively. 3. The security device of claim 1, further comprising an auxiliary spring, two ends of the auxiliary spring pushing the sleeve and the seat tube respectively to bias the sleeve toward the frame positioning device. 4. The security device of claim 3, wherein the seat tube has a long slot, the sleeve further comprises a pin sliding in the long slot, the auxiliary spring is disposed in the seat tube, and the auxiliary spring pushes the sleeve by the pin. 5. The security device of claim 1, wherein the seat-plate locking part is disposed at a side portion of the seat plate. 6. The security device of claim 1, wherein the end portion of the seat-plate locking part is aligning with the first hole. 7. A child stroller, comprising: a side support assembly;a rear leg assembly;a frame positioning device, the rear leg assembly and the side support assembly being pivotally connected by the frame positioning device;a front leg assembly, the front leg assembly and the rear leg assembly being pivotally connected;a chair assembly, comprising a seat tube and a seat plate, the seat tube being mounted on the frame positioning device; anda security device, comprising: a sleeve, the seat plate being disposed on the sleeve, the sleeve being sleeved on the seat tube in a slidable way and being pivotally connected to the front leg assembly, the sleeve having a first hole, the seat tube having a second hole, the first hole being substantially aligning with the second hole when the child stroller is unfolded;a seat-plate locking part, movably disposed on the seat plate, the seat-plate locking part having an end portion; andan elastic restore part, connected to the seat-plate locking part, when the first hole is substantially aligning with the second hole and the seat plate is weighted, the end portion being engaged in the first hole and the second hole simultaneously to constrain the sleeve and the seat tube from moving relatively, and when the seat plate is un-weighted, the elastic restore part driving the seat-plate locking part to disengage the end portion from the second hole such that the sleeve is capable of moving relatively to the seat tube. 8. The child stroller of claim 7, wherein the seat plate forms an accommodating space, the seat-plate locking part is disposed in the accommodating space, and the elastic restore part abuts against the seat-plate locking part and the sleeve respectively. 9. The child stroller of claim 7, wherein the security device further comprises an auxiliary spring, and two ends of the auxiliary spring push the sleeve and the seat tube respectively to bias the sleeve toward the frame positioning device. 10. The child stroller of claim 9, wherein the seat tube has a long slot, the sleeve further comprises a pin sliding in the long slot, the auxiliary spring is disposed in the seat tube, and the auxiliary spring pushes the sleeve by the pin. 11. The child stroller of claim 7, wherein the seat-plate locking part is disposed at a side portion of the seat plate. 12. The child stroller of claim 7, wherein the end portion of the seat-plate locking part is aligning with the first hole. 13. The child stroller of claim 7, wherein the child stroller comprises a handle assembly, the handle assembly comprises a handle tube, the frame positioning device comprises a side-support connecting part, a rear-leg connecting part, and an engaging part, the side support assembly is mounted on the side-support connecting part, the rear leg assembly is mounted on the rear-leg connecting part, the side-support connecting part and the rear-leg connecting part are pivotally connected, the engaging part is used to lock rotation movement between the side-support connecting part and the rear-leg connecting part, the handle tube is connected to the side support assembly in a slidable way, and the handle tube is capable of moving toward the frame positioning device to push the engaging part so as to unlock the side-support connecting part and the rear-leg connecting part. 14. The child stroller of claim 13, wherein the side-support connecting part and the rear-leg connecting part have a first opening and a second opening respectively, and when the child stroller is unfolded, the first opening is substantially aligning with the second opening such that the engaging part moves through the first opening and the second opening to constrain relative rotation between the side-support connecting part and the rear-leg connecting part. 15. The child stroller of claim 14, wherein the frame positioning device further comprises a pushing part, the pushing part is disposed in the side-support connecting part in a slidable way, and when the handle tube moves toward the frame positioning device to push the pushing part, the pushing part pushes the engaging part to unlock the side-support connecting part and the rear-leg connecting part. 16. The child stroller of claim 13, wherein the side-support connecting part and the rear-leg connecting part have a first opening and a second opening respectively, the engaging part is capable of moving in the first opening and the second opening, the frame positioning device further comprises a spring, and two ends of the spring push the engaging part and the side-support connecting part for biasing the engaging part toward the first opening. 17. The child stroller of claim 13, wherein the side support assembly comprises a plurality of length-adjustment engagement holes, the handle assembly further comprises an operation assembly, a towing part, a towing-part holder, a handle-tube engagement part, and a release part, the release part is disposed at an end portion of the handle tube, the handle tube is capable of pushing the engaging part of the frame positioning device by the release part to unlock the side-support connecting part and the rear-leg connecting part, the towing part connects the operation assembly and the towing-part holder, the towing-part holder and the handle-tube engagement part are connected such that the handle-tube engagement part is capable of being driven to be engaged in or disengaged from one of the length-adjustment engagement holes, and when the handle-tube engagement part is engaged in one of the length-adjustment engagement holes, the handle tube is fixed relatively to the side support assembly. 18. The child stroller of claim 17, wherein the handle assembly further comprises a restore spring, the release part has a slot and an opening, the handle-tube engagement part is disposed in the slot, the handle-tube engagement part has an end portion, the end portion of the handle-tube engagement part protrudes out of the opening of the release part so as to be engaged in one of the length-adjustment engagement holes, and the restore spring is compressively disposed in the slot to bias the handle-tube engagement part toward the opening of the release part. 19. The child stroller of claim 17, wherein a sliding direction is defined, the handle tube is capable of moving along the sliding direction relatively to the side support assembly, the handle-tube engagement part has a slanting slot, the release part has a pin slot, an extension direction of the pin slot is substantially parallel to the sliding direction, an extension direction of the slanting slot slants relatively to the sliding direction, the handle assembly further comprises a pin, the handle-tube engagement part, the release part, and the towing-part holder are pin-jointed by the pin, and the pin passes through the slanting slot and the pin slot such that the towing-part holder is capable of driving the handle-tube engagement part to be engaged in or disengaged from one of the length-adjustment engagement holes by the pin. 20. The child stroller of claim 13, further comprising a backrest assembly, the backrest assembly comprising a backrest engaging plastic part, a backrest supporting tube, and a headrest supporting tube, the backrest engaging plastic part being disposed on the sleeve and having a plurality of engaging holes, the backrest supporting tube being selectively engaged in one of the engaging holes, the backrest supporting tube being pivotally connected to the headrest supporting tube, wherein the headrest supporting tube rotates relatively to the backrest supporting tube during an adjustment of the backrest supporting tube from a upright position to a lying position. 21. The child stroller of claim 20, wherein the backrest assembly further comprises a linking part, two ends of the linking part are pivotally connected to the sleeve and the headrest supporting tube respectively. 22. The child stroller of claim 21, wherein the linking part is pivotally connected to a linking plate, and the linking plate is pivotally connected to the sleeve. 23. The child stroller of claim 20, wherein the headrest supporting tube and the backrest supporting tube are connected to a couple of upper connecting plastic parts and a couple of lower connecting plastic parts respectively, and the upper connecting plastic part and the lower connecting plastic part are pivotally connected to each other correspondingly. 24. The child stroller of claim 23, wherein the upper connecting plastic part and the lower connecting plastic part respectively have a limit hole, a pin passes through the limit holes of the upper connecting plastic part and the lower connecting plastic part so as to limit a rotation range of the upper connecting plastic part and the lower connecting plastic part. 25. The child stroller of claim 13, further comprising a canopy assembly, the canopy assembly comprising a canopy holder and a canopy-engaging part, the canopy-engaging part being disposed on the side support assembly, the canopy holder being movably disposed on the canopy-engaging part. 26. The child stroller of claim 7, wherein the front leg assembly comprises a front-leg connecting bar, a front cross bar, and a storage device, and the storage device is disposed between the front-leg connecting bar and the front cross bar. 27. The child stroller of claim 26, wherein the storage device has an opening, and the opening is disposed at a bottom of the storage device.
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