# US 2026/0233646 A1 · Child safety seat

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- Number: US 2026/0233646 A1
- Document ID: US20260233646A1
- Status: Published application
- Kind: A1
- Application number: 19/157,988
- Filed: 2024-02-20
- Published: 2026-08-13
- Earliest claimed: 2023-02-20
- Assignees: Wonderland Switzerland AG
- Applicants: Wonderland Switzerland AG
- Inventors: Daliang ZHANG; Ganqing FANG
- Web page: https://patentgrep.com/patent/US20260233646A1

## CPC

- B60N 2/2851: {provided with head-rests}
- B60N 2/269: {detecting or alerting means responsive to the Isofix locking on the child seat or vehicle}
- B60N 2/2818: {characterised by guiding means for children belts}
- B60N 2/2872: {provided with side rests}
- B60N 2/2875: {inclinable, as a whole or partially}
- B60N 2/2887: {Fixation to a transversal anchorage bar, e.g. isofix}
- B60N 2/5642: {with circulation of air through a layer inside the seat}
- B60N 2/5664: {with unforced air circulation, i.e. not using a fan or the like}
- B60N 2/286: {forward facing (B60N2/2866 takes precedence)}
- B60N 2/2866: {booster cushions, e.g. to lift a child to allow proper use of the conventional safety belts}
- B60N 2/5635: {coming from the passenger compartment}
- B60N 2002/2896: {the child seat being foldable, e.g. to facilitate transport}
- B60N: SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR

## Abstract

The present disclosure discloses a child safety seat. The child safety seat includes a seat body, a fixing assembly, and an indicating assembly. The indicating assembly is disposed on the seat body and comprises an indicating element, and the indicating element is linked with the fixing assembly, so that when the fixing assembly is unlocked, indicating element is held in a first position, and when the fixing assembly is locked, the indicating element is held in a second position. The child safety seat and the indicating assembly provided by the present disclosure can conveniently remind a user of a state of the fixing assembly.

## Claims

### Claim at position 1

1-20. (canceled)

### Claim 21

A child safety seat comprising:
a headrest portion, provided with a first groove for a safety belt to pass through; and
a backrest portion, wherein the headrest portion is slidably connected to the backrest portion, so that the headrest portion is capable of being adjusted to different positions relative to the backrest portion,
wherein, the backrest portion is provided with a first turning portion which is disposed on the backrest portion, and the safety belt bypasses the first turning portion and extends out from a front side of the child safety seat through the first groove,
wherein the headrest portion is movable between a first position and a second position relative to the backrest portion, and the first turning portion is located in a height adjustment stroke of the headrest portion relative to the backrest portion, and
when the first groove is lower than the first turning portion, the safety belt passing through the first groove allows adjustment of the position of the headrest portion, and when the first groove is not lower than the first turning portion, the safety belt passing through the first groove limits a further upward adjustment of the headrest portion relative to the backrest portion.

### Claim 22

(canceled)

### Claim 23 (depends on 21)

The child safety seat according to claim 21, wherein the height adjustment stroke is a moving range of a lower edge of a body of the headrest portion when the headrest portion moves from the first position to the second position.

### Claim 24 (depends on 23)

The child safety seat according to claim 23, wherein the headrest portion is configured such that: when the headrest portion is in the first position, a vertical height of a lower edge of the first groove is higher than the first turning portion, and when the headrest portion is in the second position, the vertical height of the lower edge of the first groove is lower than the first turning portion.

### Claim 25 (depends on 23)

The child safety seat according to claim 23, wherein the length of the first groove is smaller than a distance between the first position and the second position.

### Claim 26 (depends on 23)

The child safety seat according to claim 23, wherein the backrest portion is provided with a second groove for the safety belt to pass through, and the first turning portion coincides with the second groove in a vertical direction.

### Claim 27 (depends on 26)

The child safety seat according to claim 26, wherein the headrest portion is configured such that: at least a part of the first groove coincides with the second groove when the headrest portion slides within the height adjustment stroke of the headrest portion relative to the backrest portion.

### Claim 28 (depends on 23)

The child safety seat according to claim 23, wherein the backrest portion is formed with a buckle storage space for storing a male buckle, wherein the headrest portion shields at least a part of the buckle storage space when the headrest portion is in the first position, and the headrest portion does not shield the buckle storage space when the headrest portion is in the second position.

### Claim 29 (depends on 28)

The child safety seat according to claim 28, wherein the buckle storage space is provided with a magnetic buckle for adsorbing a buckle.

### Claim 30

(canceled)

### Claim 31 (depends on 21)

The child safety seat according to claim 21, wherein the child safety seat is further provided with a second turning portion, which is disposed at a rear part of a seat portion of the child safety seat, and the safety belt is configured to bypass the second turning portion and the first turning portion and pass through the first groove to the front side of the child safety seat.

### Claim at position 13

32-37. (canceled)

### Claim 38 (depends on 21)

The child safety seat according to claim 21, wherein:
the headrest portion comprises a board portion, wherein the board portion is provided with a first vent region, and the first vent region comprises a first vent; and
the backrest portion is provided with a second vent region, and the second vent region comprises a second vent;
wherein when the first vent region at least partially overlaps with the second vent region, the first vent is communicated with the second vent, wherein
the board portion is slidable along a path relative to the backrest portion, and the board portion is capable of being held in at least one position in the path; and
at a position where the first vent region at least partially overlaps with the second vent region, at least one first vent is communicated with at least one second vent, and when the board portion is located at the position where the first vent region at least partially overlaps with the second vent region, an overlapping area between the first vent and the second vent is at least 20% of an area of the board portion.

### Claim at position 15

39-44. (canceled)

### Claim 45 (depends on 38)

The child safety seat according to claim 38, wherein the headrest portion comprises a buffer portion connected to the board portion, wherein the first vent region is closer to an end of the board portion away from the buffer portion, and a distribution density of the first vent in a range of the first vent region is greater than or equal to a distribution density of the second vent in a range of the second vent region, and
the board portion is slidable along the path relative to the backrest portion, and the board portion is capable of being held in the at least one position in the path, wherein a moving stroke of the board portion between two adjacent positions is an integer multiple of a vertical distance between two adjacent second vents.

### Claim 46

(canceled)

### Claim 47 (depends on 38)

The child safety seat according to claim 38, wherein the backrest portion comprises:
a front cover, provided with the second vent; and
a rear cover, attached to a longitudinal rear of the front cover, wherein the rear cover is provided with a third vent region, and a third vent is disposed in the third vent region,
wherein the third vent region is divided into a middle region corresponding to the front cover and surrounding regions respectively located at both sides of the middle region, and a distribution density of the third vent in the middle region is less than or equal to a distribution density of the third vent in either of the surrounding regions.

### Claim 48 (depends on 38)

The child safety seat according to claim 38, wherein the backrest portion comprises:
a front cover, provided with the second vent; and
a rear cover, attached to a longitudinal rear of the front cover, wherein the rear cover is provided with a third vent region, and a third vent is disposed in the third vent region, at least one of the second vent and the first vent is communicated with the third vent, and a vertical distance between adjacent third vents is an integer multiple of a vertical distance between adjacent first vents, or an integer multiple of a vertical distance between adjacent second vents.

### Claim 49 (depends on 21)

The child safety seat according to claim 21, wherein the child safety seat comprises:
a seat portion, wherein the backrest portion is connected to the seat portion; and
a buckle storage structure, disposed in the seat portion and the backrest portion, wherein the buckle storage structure comprises:
a first storage space, disposed in the seat portion; and
a second storage space, disposed in the backrest portion,
wherein the first storage space is disposed at a transverse center of the seat portion and close to a longitudinal front of the seat portion, and the first storage space is disposed as a concave portion depressed downward from an upper surface of the seat portion, and an edge shape of the first storage space corresponds to the female buckle,
the second storage space is disposed at a transverse center of the backrest portion and close to a vertical lower part of the backrest portion, the second storage space is arranged as a concave portion depressed backward from a front surface of the backrest portion, and an edge shape of the second storage space corresponds to the male buckle,
wherein the buckle storage structure further comprises an adsorbing element, disposed on a bottom wall of the second storage space, wherein the adsorbing element is capable of adsorbing the male buckle, so that the male buckle is kept in the second storage space.

### Claim at position 21

50-52. (canceled)

### Claim 53 (depends on 49)

The child safety seat according to claim 49, wherein the backrest portion comprises:
at least one backrest locking structure, wherein the backrest portion is connected to the seat portion via the at least one backrest locking structure, and the at least one backrest locking structure is operable from an exterior of the seat portion to unlock a connection between the backrest portion and the seat portion, and wherein the backrest locking structure comprises:
a locking element, movable between a locking position and an unlocking position, wherein when the locking element is in the locking position, the locking element at least partially extends out of the backrest portion and is capable of being inserted into the seat portion to connect the backrest portion to the seat portion, and when the locking element is in the unlocking position, the locking element retracts into the backrest portion and is separated from the seat portion; and
a restoring element, configured to bias the locking element toward the locking position.

### Claim 54 (depends on 53)

The child safety seat according to claim 53, wherein the locking element comprises:
a first end, facing an outside of the backrest portion, wherein the first end extends out of the backrest portion when the locking element is in the locking position;
a second end, opposite to the first end in a longitudinal direction and facing an inner side of the backrest portion, wherein the restoring element abuts against the second end; and
an operating portion, located between the first end and the second end, wherein the operating portion is operable from an external of the backrest portion, and the operating portion is disposed to be butted by a finger to move the locking element to the unlocking position.

### Claim 55 (depends on 53)

The child safety seat according to claim 53, wherein:
the backrest portion comprises at least one engagement portion extending from a vertical lower end of the backrest portion in a longitudinal direction, and the backrest locking structure is disposed in the engagement portion; and
the seat portion comprises at least one engagement groove, which is disposed at a longitudinal rear end of the seat portion, wherein a locking groove is disposed at a front wall of the engagement groove, and the locking element is capable of being inserted into the locking groove, to engage the backrest portion to the seat portion.

### Claim 56 (depends on 55)

The child safety seat according to claim 55, wherein:
the backrest portion is vertically engaged to the seat portion, and the locking element is disposed to be engaged to the locking groove to prevent a relative movement between the backrest portion and the seat portion in the vertical direction.

### Claim 57 (depends on 21)

The child safety seat according to claim 21, wherein the child safety seat further comprises:
a seat portion; and
a seat angle adjusting structure, comprising a supporting element disposed on a bottom surface of the seat portion, wherein the supporting element is movable between an unfolded position and a folded position relative to the seat portion to adjust an angle of the seat portion relative to a horizontal plane,
wherein a movement of the supporting element between the unfolded position and the folded position is an overturning movement around a transverse axis, and the unfolded position of the supporting element is closer to a longitudinal front of the seat portion than the folded position.

### Claim 58 (depends on 57)

The child safety seat according to claim 57, wherein the supporting element comprises:
two adjusting portions, pivotally connected to the seat portion respectively; and
a connecting portion, connected between the two adjusting portions in a transverse direction,
wherein each adjusting portion comprises at least one protruding surface and at least one non-protruding surface which are opposite to each other in a vertical direction; and
when the supporting element is in the unfolded position, the non-protruding surface abuts against a bottom surface of the seat portion, and the protruding surface protrudes downward from the bottom surface of the seat portion to raise a front end of the seat portion, and when the supporting element is in the folded position, the supporting element is folded into the seat portion.

### Claim at position 28

59-60. (canceled)