# US 12,005,949 B2 · Wheel shock absorption structure and child carrier > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,005,949 B2 - Document ID: US12005949B2 - Status: Granted - Kind: B2 - Application number: 17/787,133 - Filed: 2020-12-18 - Published: 2023-01-19 - Granted: 2024-06-11 - Earliest claimed: 2019-12-20 - Assignees: Wonderland Switzerland AG - Applicants: Wonderland Switzerland AG - Inventors: Haibo Zeng - Web page: https://patentgrep.com/patent/US12005949B2 ## CPC - B62B 9/00: Accessories or details specially adapted for children's carriages or perambulators (providing for travelling on snow B62B19/00) - B60B 33/045: {mounted resiliently, by means of dampers} - B62B 9/18: Resilient suspensions of bodies - B60B 33/001: {by snapping, clicking or latching in} - B60B 33/0039: {Single wheels} - B60B 33/0049: {the rolling axle being horizontal} - B60B 33/0057: {the rolling axle being offset from swivel axis} - B60B 33/0068: {the swivel axis being vertical} - B60Y 2200/83: Perambulators; Buggies; Strollers - B62B 2301/05: Details of the attachment of the wheel assembly to the chassis - B62B 2301/20: Resilient wheel suspension using springs - B62B: HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES (characterised by animal propulsion B62C; propulsion of sledges by driver or engine B62M) - B60B: VEHICLE WHEELS (making wheels or wheel parts by rolling B21H1/00, by forging, hammering or pressing B21K1/28); CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY ## Abstract A wheel shock absorption structure and a child carrier having the wheel shock absorption structure, including a wheel shaft and a wheel seat connected with a frame, and a lower end of the wheel seat is rotatably connected with a wheel through the wheel shaft. Further including a shock absorber with an elastic structure, an upper end of the shock absorber is removably connected with an upper end of the wheel seat, and the shock absorber rotates synchronously along with the wheel seat; a lower end of the shock absorber is rotatably connected with the wheel shaft which is slidably connected with the lower end of the wheel seat. The shock absorber is driven by sliding of the wheel shaft to generate recoverable elastic deformation to provide damping and buffering. The bending deformation of the shock absorber ensures that the wheel shock absorption structure has a better shock absorbing effect. ## Claims ### Claim 1 A wheel shock absorption structure, comprising: a wheel shaft, a mounting seat, and a wheel seat, the mounting seat being rotatably connected with a frame and detachably connected with the wheel seat, a lower end of the wheel seat being rotatably connected with a wheel through the wheel shaft; and a shock absorber with an elastic structure, an upper end of the shock absorber is connected with an upper end of the wheel seat, and the shock absorber rotates synchronously along with the wheel seat; wherein the upper end of the wheel seat is coupled to the mounting seat, and the upper end of the shock absorber is clamped around the mounting seat and clamped between the wheel seat and the mounting seat. ### Claim 2 (depends on 1) The wheel shock absorption structure according to claim 1, wherein a lower end of the shock absorber is rotatably connected with the wheel shaft which is slidably connected with the lower end of the wheel seat; and the shock absorber is driven by sliding of the wheel shaft to generate recoverable elastic deformation to provide damping and buffering. ### Claim 3 (depends on 2) The wheel shock absorption structure according to claim 2, wherein the shock absorber is driven by the sliding of the wheel shaft to generate elastic bending deformation to provide damping and buffering. ### Claim 4 (depends on 3) The wheel shock absorption structure according to claim 3, wherein the shock absorber has a bending structure. ### Claim 5 (depends on 4) The wheel shock absorption structure according to claim 4, wherein the shock absorber is formed by bending a strip-shaped object. ### Claim 6 (depends on 1) The wheel shock absorption structure according to claim 1, wherein the lower end of the wheel seat is provided with an elongated slot for the wheel shaft to slide. ### Claim 7 (depends on 6) The wheel shock absorption structure according to claim 6, wherein the elongated slot is arranged obliquely relative to the wheel seat. ### Claim 8 (depends on 1) A child carrier comprising the frame and the wheel mounted on the frame, wherein the child carrier further comprises the wheel shock absorption structure according to claim 1 connected between the frame and the wheel, wherein the upper end of the wheel seat of the wheel shock absorption structure is connected with the frame, and the wheel is slidably connected with the lower end of the wheel seat through the wheel shaft. ### Claim 9 (depends on 8) The child carrier according to claim 8, wherein the frame is a child bed frame or a child stroller frame. ### Claim 10 A wheel shock absorption structure, comprising: a wheel shaft, a mounting seat, and a wheel seat, the mounting seat being rotatably connected with a frame and detachably connected with the wheel seat, a lower end of the wheel seat being rotatably connected with a wheel through the wheel shaft; and a shock absorber with an elastic structure, an upper end of the shock absorber is connected with an upper end of the wheel seat, and the shock absorber rotates synchronously along with the wheel seat; wherein the shock absorber comprises a connection portion disposed on the mounting seat, and the connection portion has a snap ring structure with an opening. ### Claim 11 (depends on 10) The wheel shock absorption structure according to claim 10, wherein the mounting seat is provided with a groove matched with the snap ring structure, and the snap ring structure is engaged with the mounting seat through the groove. ### Claim 12 (depends on 10) The wheel shock absorption structure according to claim 10, wherein the connection portion bends and extends toward the wheel shaft to form a cantilever portion, and a lower end of the cantilever portion is rotatably connected with the wheel shaft. ### Claim 13 (depends on 12) The wheel shock absorption structure according to claim 12, wherein a bending part of the cantilever portion is clamped on the mounting seat. ### Claim 14 (depends on 13) The wheel shock absorption structure according to claim 13, wherein the mounting seat protrudes a positioning protrusion which is fitted by the bending part of the cantilever portion. ### Claim 15 (depends on 13) The wheel shock absorption structure according to claim 13, wherein a direction of the opening of the snap ring structure is opposite to a direction of a notch formed at the bending part of the cantilever portion. ### Claim 16 (depends on 13) The wheel shock absorption structure according to claim 13, wherein the upper end of the wheel seat protrudes a clamping protrusion on which the bending part of the cantilever portion is carried. ### Claim 17 (depends on 12) The wheel shock absorption structure according to claim 12, wherein a plane where the snap ring structure is positioned is non-parallel to a plane where the cantilever portion is positioned. ### Claim 18 (depends on 12) The wheel shock absorption structure according to claim 12, wherein the lower end of the cantilever portion is curled to form a positioning ring for the wheel shaft to insert. ### Claim 19 (depends on 10) The wheel shock absorption structure according to claim 10, wherein the upper end of the wheel seat is coupled to the mounting seat, and the upper end of the shock absorber is clamped between the wheel seat and the mounting seat.