# US 2017/0282952 A1 · Infant Stroller Apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0282952 A1 - Document ID: US20170282952A1 - Status: Published application - Kind: A1 - Application number: 15/470,230 - Filed: 2017-03-27 - Published: 2017-10-05 - Earliest claimed: 2016-03-29 - Assignees: Wonderland Nurserygoods Company Limited - Applicants: Wonderland Nurserygoods Company Limited - Inventors: Zehua YI - Web page: https://patentgrep.com/patent/US20170282952A1 ## CPC - B62B 7/062: {Coupling unit between front wheels, rear wheels and handle} - B62B 9/20: Handle bars; Handles - B62B 7/142: {Means for securing the body to the frame} - B62B 2205/22: remotely controlled, e.g. from the handlebar - B62B: HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES (characterised by animal propulsion B62C; propulsion of sledges by driver or engine B62M) ## Abstract An infant stroller apparatus includes a first and a second leg frame respectively having a first and a second side segment respectively connected fixedly with a first and a second coupling part, and a handle frame having a third side segment fixedly connected with a third coupling part. The second and third coupling parts are respectively connected pivotally with the first coupling part. Moreover, the infant stroller apparatus includes a first latch operable to rotationally lock the handle frame with respect to the first leg frame, a second latch operable to rotationally lock the second leg frame with respect to the first leg frame, and a linkage assembly respectively connected with the third coupling part and the second latch such that a folding rotation of the handle frame relative to the first leg frame urges an unlocking displacement of the second latch. ## Claims ### Claim 1 An infant stroller apparatus comprising: a first leg frame having a first side segment fixedly connected with a first coupling part; a second leg frame having a second side segment fixedly connected with a second coupling part, the second coupling part being pivotally connected with the first coupling part; a handle frame having a third side segment fixedly connected with a third coupling part, the third coupling part being pivotally connected with the first coupling part; a first latch disposed between the first and third coupling parts, the first latch being operable to rotationally lock the handle frame with respect to the first leg frame in an unfolded state of the infant stroller apparatus; a second latch disposed between the first and second coupling parts, the second latch being operable to rotationally lock the second leg frame with respect to the first leg frame in the unfolded state of the infant stroller apparatus; and a linkage assembly respectively connected with the third coupling part and the second latch such that a folding rotation of the handle frame relative to the first leg frame urges an unlocking displacement of the second latch. ### Claim 2 (depends on 1) The infant stroller apparatus according to claim 1, wherein the third coupling part is pivotally connected with the first coupling part about a first pivot axis, and the second coupling part is pivotally connected with the first coupling part about a second pivot axis. ### Claim 3 (depends on 1) The infant stroller apparatus according to claim 1, wherein the first latch is slidably assembled with the third coupling part, and the first coupling part includes a first guide slot having a straight portion and an arcuate portion connected with each other, the first latch engaging with the straight portion to rotationally lock the handle frame with respect to the first leg frame in the unfolded state of the infant stroller apparatus, and the first latch being disengaged from the straight portion and sliding along the arcuate portion during a rotation of the handle frame relative to the first leg frame. ### Claim 4 (depends on 3) The infant stroller apparatus according to claim 3, wherein the arcuate portion is connected with a fold locking recess provided at an end of the arcuate portion opposite to the straight portion, and the first latch being engaged with the fold locking recess when the infant stroller apparatus is in a collapsed state. ### Claim 5 (depends on 1) The infant stroller apparatus according to claim 1, wherein the third side segment is assembled with a release actuator, and the first latch is connected with the release actuator via a flexible drawing member, the release actuator being operable to urge the first latch to move for unlocking the handle frame. ### Claim 6 (depends on 5) The infant stroller apparatus according to claim 5, wherein the drawing member is a cable, a cord, a wire, a rope, a strip and the like. ### Claim 7 (depends on 1) The infant stroller apparatus according to claim 1, further including a first spring connected with the first latch, the first spring biasing the first latch to a locking state. ### Claim 8 (depends on 1) The infant stroller apparatus according to claim 1, wherein the second latch is slidably assembled with the first coupling part, and the second coupling part includes a second guide slot having a straight portion and an arcuate portion connected with each other, the second latch engaging with the straight portion of the second guide slot to rotationally lock the second leg frame with respect to the first leg frame in the unfolded state of the infant stroller apparatus, and the second latch being disengaged from the straight portion of the second guide slot and sliding along the arcuate portion of the second guide slot during a rotation of the second leg frame relative to the first leg frame. ### Claim 9 (depends on 1) The infant stroller apparatus according to claim 1, further including a second spring connected with the second latch, the second spring biasing the second latch to a locking state. ### Claim 10 (depends on 1) The infant stroller apparatus according to claim 1, wherein the linkage assembly includes a slider that is slidably assembled with the first coupling part and is connected with the third coupling part, and a flexible drawing member having two opposite ends respectively connected with the slider and the second latch, a folding rotation of the handle frame urging the slider to move relative to the first coupling part for pulling on the drawing member. ### Claim 11 (depends on 10) The infant stroller apparatus according to claim 10, wherein the drawing member is a cable, a cord, a wire, a rope, a strip and the like. ### Claim 12 (depends on 10) The infant stroller apparatus according to claim 10, wherein the third coupling part includes a third guide slot having a straight portion and an arcuate portion connected with each other, the slider being guided for sliding movement along the third guide slot. ### Claim 13 (depends on 12) The infant stroller apparatus according to claim 12, wherein the slider is located in a position adjacent to the straight portion of the third guide slot in the unfolded state of the infant stroller apparatus. ### Claim 14 (depends on 1) The infant stroller apparatus according to claim 1, wherein the first and second latches are respectively assembled slidably with the third and first coupling parts, the first coupling part includes a first guide slot having a first straight portion and a first arcuate portion connected with each other, and the second coupling part includes a second guide slot having a second straight portion and a second arcuate portion connected with each other, the first latch sliding along the first arcuate portion during a rotation of the handle frame relative to the first leg frame and engaging with the first straight portion to rotationally lock the handle frame with respect to the first leg frame in the unfolded state of the infant stroller apparatus, and the second latch sliding along the second arcuate portion during a rotation of the second leg frame relative to the first leg frame and engaging with the second straight portion to rotationally lock the second leg frame with respect to the first leg frame in the unfolded state of the infant stroller apparatus. ### Claim 15 (depends on 14) The infant stroller apparatus according to claim 14, wherein the third coupling part is pivotally connected with the first coupling part about a first pivot axis, and the second coupling part is pivotally connected with the first coupling part about a second pivot axis, the first arcuate portion being centered on the first pivot axis, and the second arcuate portion being centered on the second pivot axis. ### Claim 16 (depends on 1) The infant stroller apparatus according to claim 1, wherein the first leg frame is a rear leg frame, and the second leg frame is a front leg frame. ### Claim 17 (depends on 1) The infant stroller apparatus according to claim 1, wherein the first coupling part extends generally vertically when the infant stroller apparatus is in the unfolded state, the second coupling part being pivotally connected with a lower portion of the first coupling part, and the third coupling part being pivotally connected with an upper portion of the first coupling part. ### Claim 18 (depends on 1) The infant stroller apparatus according to claim 1, wherein the third coupling part is assembled with a first seat connector, and the first side segment is assembled with a second seat connector positioned lower than the first seat connector, each of the first and second seat connectors being adapted to receive the removable installation of an infant carrier.