GB2598264A

GB2598264A - Child safety seat and a width-adjustable side bolster mechanism thereof

Info

Publication number: GB2598264A
Application number: GB2117794.4A
Authority: GB
Inventors: Guo Zheng-Wen; Cui Zong-Wang
Original assignee: Wonderland Switzerland AG
Current assignee: Wonderland Switzerland AG
Priority date: 2016-09-06
Filing date: 2017-08-21
Publication date: 2022-02-23
Anticipated expiration: 2037-08-21
Also published as: JP2018039500A; JP2021120273A; CN107791905A; DE102017012331B3; DE202017007417U1; GB201713396D0; JP2022186976A; GB2593329B; GB2598264B; DE102017119698B4; DE102017119698A1; GB2593329A; CN107791905B; JP7168723B2; GB202117794D0; DE202017007271U1; GB2555914A; GB2555914B; DE102017012376B4; JP6892356B2

Abstract

A width-adjustable side bolster mechanism 60 of a child safety seat 1 comprising a main body, and a pair of side bolsters 50. The mechanism 60 is adapted to adjust a width between the pair of side bolsters 50 such that the width is smaller when a headrest 40 of the child safety seat 1 is moved into a lower position, and the width is larger when the headrest 40 is moved into an upper position. The mechanism 60 may comprise a resilient structure disposed between the side bolster 50 and the main body. The resilient structure provides a biasing force acting on the side bolster 50 and can allow the biasing force to be overcome when a side force larger than the biasing force is applied to the side bolster 50 so that the width between the side bolsters 50 can be adjusted.

Description

SEAT AND A WIDTH -ADJUSTABLE

SIDE BOLSTER TrHANTSM THEREOF The di sciosure relates to a child safety seat, and more oafficularly to a child safety seat. having a width-adjustapae side bolster

_

mechanism.

With the widespread use of child carriers, child carriers are demanded to prov*de more functions. A. child carrier should be operated and used conveniently in addition to providing safety and comfort to a child carried thereon.

Child safety seats or car seats are well known for placement on a. vehli.le to protect children from injury or death during-car collisions.

car-seat generally includes a seat bottom, a backrest connected to the seat bottom, and a headrest and side bolsters connected to the backrest. The headrest and the side bolsters are adjustable relative to the backrest to accommodate fl,,H]dren of different heights. In a. conventional child safety seat, height ---adjustment cf the headrest relative to the backrest can generate pivoting movement of the sice bolsters so as to adjust the width between the side bolsters. However, the drawback of such child safety seat is that, when placing several child safety seats on a. backseat of a vehicle, the side bol.sters of the juxtaposed safety seats are interfered with each other, or with the car door.. As such, adjustment of the headrest is required to change the width between the side bolsters, which is inconvenient in Therefore, an object of the disclosure is to provide a. width-adjustable side bolster mechanism and a child safety seat having the same, that can alleviate at least one of the drawbacks of the prior art.

According to the disclosure, the width-adjustable side bolster mechanism of a child safety seat is for adjusting a width between side bolsters of the child safety seat. The width-adjustable side bolster mechanism includes a. guideway disposed in one of the side bolsters, driving member securedly disposed on a headrest of the child safety seat, and having a guide stem which is czlidablv engaged in the guideway to be mbved along the guideway between a lower position, where the width between the side bolsters is smaller, and an upper position, where the width between the side bolsters is larger, and a resilient structure disposed between the side bolster and a main body of the child safety seat, and providing a biasi ng. force which keeps a contour of the guideway when. the guide stem is moved between the upper and lower positions, and which is overcome when a side force larger than the biasing force is applied to the side bolster to permit displacement of the side bolster so as to adjust the wid.L.h between the boasters.

According to the disclosure, the child safety seat includes a seat. bottom, a backrest connected to the seat bottom, a headrest slid-,=.bly connected to the backrest, and two side bolsters respectively disposed on two lat.eral sides of the backrest. The child safety seat further includes a width-adjustable sHde bolster mechanism as described hereinbefore.

The invenoson is defined by the cia.ims. In this egar drawing.

references are provided in parentheses within the claims merely to provide examples of the claim features. Thus, the claims may be read and interpreted with or without regard to the provided drawing references.

Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiments with reference to the accompanying drawings, of which: FIG. I is a perspective view illustrating an embodiment of a child safety seat according to the disclosure, FIG. 2 is a perspective view illuctrating the embodiment when;, headrest and side bolsters The r-HLd safety seat are in a first state; FIG. 3 is a perspective view illustrating the embodiment when the headrest and the side bolsters are in a second state; FIG. 4 is a front perspective view of FIG. 2; FIG. 5 is a rear perspective view of FIG. 2; FIG. 6 is a perspective view of the embodiment shown in FIG. 3, a rear shell d a side -h being removed for the sake of clarity; FIG. 7 is an enlarged view of an encircled portion (.7%.) in FIG. 6; FIG. 8 is an exploded perspective view of a side bolster of FIG. 6; FIG. 9 is a schematic view illustrating a state when the side bolsters of the child safety seat is not subjected to a side force; FIG. 10 is 8 schematic view illustratind a state wher the side boistPrs of FIG. q is subjected to a side force; FIG. li is a perspective view illustrating another embodiment of a child safety seat according to the disclosure; FIG. 12 is a fragmentary perspective vIew of a driving member in FIG. 11; and FIGS. 13 to 15 are perspective views similar to FIG. 11 hut. taken from other angles.

Before the disclosure is described in greater detail, itshould be rica-ed that where considered appropriate, reference numerals or terminal portions of reference numerals have been repeated among the figures to indicate corresponding or analogous elements, which may optionally have similar characteristics, Referring to FIGS. 1 to 5, an embodiment of child safety seat according to the disclosure includes a base 10, a seat bottom 20 fastened onto the base 1.0, a backrest 30 connected to a rear end of the seat bottom 20, a headrest 40 s-Lidably connected to an upper end of the backrest 30, and two side bolsters SO respectively disposed on lateral sides of the backrest 30.

Further, the headrest 40 has an operating portion 41 (see FIG, 5) which is operable to adjust a height of the headrest 40 relative to the backrest 30.

With reference to FIG. 6, the child safel-,, seat I. further includes a width-adlustable sde bolster. mechanism 60 disposed between the headrest 40 and one of the side bolsters 50. fillrina the height adjustment of the headrest 40, the side bolsters 50 can be pivoted synchronously through the width-adjustable side holster mechanism 60 to adjust the width between the side bolsters 50 to accommodate children of different heights in a convenient manner. On the other hand, when the side bolsters 50 in a wider state are subjected to a side force of an object, the side bolsters 50 can be turned toward each other to change the width therebetween without the need to adjust the height of the headrest 40 to thereby diminish the interference with the object. Deferring again. to FIG. 6, in this embodiment, each of the side bolsters 50 has a lower end pivotably connected to the backrest 30 so as to be pivoted with the height adjustment of the headrest 40, and an upper end silda-ay connected to the backrest 30 by virtue of a slidablv connecting-mechanism 70 so as to provide a displacement space for the side bolster 50 when subjected to a side force, Specifically, the slidabiy connecting mechanism includes a guiding. slot 71 and a. guiding member 72 =z11dably engaged in the guiding slot 71. The guiding slot 71 is formed in one of the backrest 30 and the side bolster 50, while the guiding member 72 is fixed on the other one of the backrest 30 and the side bolster 50 In this embodiment, the guiding. slot. 71 is formed in an upper end of the side bolster 50, and the guiding member 72 is fixed on the backrest 30 and extends through the guiding slot 71 to permit sliding movement of the side bolster 50 relative to the guiding member 72.

Referring to FIGS. 9 and 10, a rib 31 is disposed on the backrest. 30 to restrain the movement of the side bolster 50 when the side bolster. 50 is subjected. to a. side force..

As shown in FIGS. 4 to 10, the construction of the width-adjus ble side bolster mechanism 60 of the child safety seat 1 is described in detail in the following.

With reference to FIGS. 4, 6 and 7, thewidth-adlustable side bolster mechanism 60 includes a driving member 61 and a guideway 62. The guideway 62 is disposed in the side bolster 50, and has a first section 521 and.s second section 622 inclined relative to the first section 621. Both the first and second sections 621, 622 extend in the directions that intersect a height-adjusting direction of the headrest 4.0 relative to the backrest 30 (see FIG. 7). The driving member 61 is securedly disposed on the headrest 40, and is slidable fitted in the guideway 62. The guideway 62 has a resilient structure disposed thereon. During the helght adjustment of the headrest 40, the width between the side bolsters 50 can be adjusted through the interaction of the driving member 61 and the guideway 62 to pivot the side holsters HO. When the side bolster SO is subjected to a side force, the resilient structure on the guideway 62 is deformed to generate a. tension that emats an inwardly pivoting movement of the side bolster SO to thereby adiust the width between the side boThters 50 without having to adjust the height of the headrest 40.

As snown. in FIG-. 1, the driving member 61 has a driving shaft 611 securedly disposed on the headrest 40, and a guide stem 612 fixed to an end portion of the driving shaft. 611. The guide stem 612 isslidahly engaged in the guideway 62 such that, when the headrest 40 is moved in an upright direction for the height adlustment, the driving shaft. 511 is moved therewith and the guide stem 512 is moved along the guideway 62. between a lower position, where the: width between the side bolsters OU 1S small e,, irinr.1 an upper position, wnere the width between the side bolsters 50 is larger so as to perform a width adjustment of the side bolsters 50.

In this embodiment, the backrest 30 has a sliding sot. 32 extending in the upright direction. The guide stem 612 is slidably extended through the sliding slot 32 so as to guide the movement of the guide stem 612.

With reference to FIGS. 6 to 0, the side bolster 50 has a flange 51 and an elongated slot 62° formed at a side of the flange 51 (see FIG. 8). A biasing confining assembly 63 is pivotably disposed between the elongated slot 62 and the flange 51 to be moved between. a. first position remote from the flange 51, and a second position close to the flange 51. The biasing confining assembly 63 extends to an upper end of the elongated slot 62' when in the first position such that the biasing confining assembly 63 confines a border side wall of the guideway 62 (see FIG. 7). The elongated slot 62' has a side wall 620° which is remote from the flange 51 to confine another border side wall of the guideway 62. The guide stem 612 is slidabiy fitted in the guideway 62. In this state, the guide stem 612, when sliding upwardly, can act upon the biasing confining assembly 63 to actuate pivoting movement of the side bolster 50. The biasing confining assembly 63 is held in the first position during the upward sliding of the guide stem 612 so as to keep the contour of the guideway 62. The guide stem 612, when sliding downwardly, can act upon the side wall 620' of the elongated slot 62' (i.e. said another border side wall of the guideway 62) to actuate pivoting movement of the side bolster 50 in an opposite direction.

When the side bolster 50 is subjected to a side force, the guide stem 612 is actuated to deform the biasing confining assembly 63 such that the biasing confining assembly. 63 is moved from the first position to the second position to generate a. tension that permits an.inwardly pivoting movement of the side bolster 50 to thereby adjust the width between the side bolsters 50 without having to adjust the height of the headrest 40.

its shown in FTGS. 7 and 8, an abutted. member 52 is disposed on the side bolster 50, and extends upwardly from an upper end wall of the elongated slot 62' such that the biasing confining. assembly 63, when in the first position, abuts against the abutted menber LY-) by means of a biasing force so as to keep the contour of the guideway 62 confined by the biasing confining assembly 63 and the elongated slot 62' (see FIG. 7) when the guide stem 612 is moved between the upper. and lower positions.

Referring to ErIG. 8, the elongated slot 62' includes a sector-shaped upper section 621° and a strip-shaped lower section 622. The width of the upper upper end, and is larger than when subjected to a side force from a. lower end that of the lower section 622. that is larger than the biasing to an Hence, force, section 621' gradually increase the side bolster 50 is moved relative to the backrest 30, and the configuration of the upper section 621° can provide space for the movement of the guide stem 612, With reference to FIGS. 7 to 9, the biasing-25 confining assembly 63 serves as the resilient structure, and includes a confining. member 631 pivotably disposed to the side bolster 50 at a. lower pivot end thereof that is adjacent. to a. lateral side of the elongated slot 62'and adjacent to the lower. section 622, and a. biasing neMber 632 abutting agclinst the confining member 631 and the flange 51 bias the confining member 631 toward the first position. In this embodiment, the biasing member 632 is a biasing spring abutting against an upper biased end of the confining member 631 that is opposite to the lower end, and against the flange 51 to provide the biasing force to permit the upper biased end of the confining. member 631 to abut against the abutted member 52, Hence, the confining. member 631 cooperates with the side wall 620' of the elongated slot 62' to define the guideway 62 for sliding of the guide stem 612. The guide stem 612 can actuate the pivoting movement of the side bolster 50 by the interaction of the guide stem. 612 and the guideway 62.

The biasing member 632 may also be of a torsion spring which is disposed at the lower pivot end of the confining member 631_ Referring to FIGS. 7 to 9, the confining member 631 extends in the upper section 621', and has at an upper pivot end a holding. portion 6311 which defines an accommodation space for holding the biasing member 632 therein, and an abutting portion 6312 which projects to abut against the abutted. member 52 facing the biasing member 632 so as to retain the confining member 531 in the first position.

Further, the confining member 631 has a frictionally engaging portion 6313 at an upper edge thereof. A stabilizing member 53 is disposed the side bolster. So such that the frictionally engaging portion 6313 is frictionally and slidably engaged with the stabilizing member 53 so as to stabilize the pivoting movement of the confining member 631.

With reference to FIGS. I. to 10, details of dffierent states of the child safety seat 1 are now described.

FIG. 2 illusbrates the headrest 6fl and the side bolsters 50 of the child safety seat 1 in a first state, where the headrest 40 is in a lower position, and the width between the side bolsters SO is relatively small.

During the upper sliding movement of the headrest 40, the guide stem 612 is moved along the sliding slot 32 of the backrest 30, as shown. in FIGS. 3 and 4. Through the interaction of the moved guide stem 612 with the side wall of the guideway 62 (i.e., the biasing force of the biasing member 632 acts up,..4-1 the confining in ember 631 to make a cons [ant abutment of the confining member 631 against the abutted member 52 to keep the contour of the guideway 62, as shown in FIGS. and 7), the side bolsters 50 can be pivoted outwardly so as to increase the wieth between the side holsters 50. Upon completion c:-f the adjustment, the headrest 40 is in an upper position, and the width between the side bolsters 30 is relatively large. As shown in FIGS. 3 and 9, the guide stem 612 is held in this position by the biasing force of the biasing member 632. On the other hand, the biasing force of the biasing merber 632 can be overcome by a side force applied to the side bolster 50. A detailed description is as follows.

When the side bolsters 50 of the child safety seat. 1 in the wider state as shown in FIG, 9 are subjected to a side force by interfering with a side holster of another child safety seat or a. car door, the side holster SO is moved relative to the backrest 30 to the state as shown in FIG. 10. During this movement, the confining member 631 is turned relative to the elongated slot 62' from the first position to the second. position, where the biasing member 632 is depressed (deformed) to generate;=, tension that results in an inwardly pivoting movement of the side bolster 50 to thereby reduce the width between the side holsters 50 until the confining member 631 abuts against the flange 51, as shown in FIG. 10. Thus, the width adjustment of the side bolsters 50 can be performed without having to adlust the height of the headrest. 40_ When the side force is not applied to the side bolster 50, the tdasing member 632 is recovered to its original state, which generates a i-ension That permits an outwardly pivoting movement of the side bolster 50 to the wider state.

In a modified embodiment, the biasjnn force of the biasing member-632 acted upon the confining member 631 is not sufficient to keep the contour of the guideway 62 during the upward sliding movement of the guide stem 612 to a leading part of the upper section 621' of the elongated slot 62'. The confining member 631 is displaced to vary the contour of the guideway-62 in this case so as to accommodate variation of the width of the side bolsters SO when an external force is latevally and friwardly appited to the side bolster 50. In this embodiment, when the guide stem 612 continues to slide upwardly along the sliding slot 32 to a trailing part of the upper section 621', the biasing force of the biasing member 632 acted upon the confining member 621 is sufficient to permit abutment of the confining member 632 against the abutted member 52, Namely, the contour of the guideway 62 is restored so as to actuate the outwardly pivoting moveoent of the side bolster 50.

When the height of the headrest 40 is adjusted from the state of FIG. 3 to the state of FIG. 2, the guide stem 612 acts upon the side wall.

of the elongated slot 67 such that a horizontal component of a force of the guide stem. 612 acted upon the side wail 620' can actuate an inwardly pivoting movement of the side bolsters 50 so as to reduce the width therebetween.

With reference to FIGS. 11 to 15, another embodiment of the child safety seat of the disclosure is now described.

Pefer-rAnd to VTGS 11 to 13, the w dth-adjustable side bolster m,.,chanism. 60 includes the driving member 61° securely connected to the headrest 40, and a guideway 62 disposed in the side bolster 50 to be in slidable engagement of the driving member 61'.

The guideway. 62 has a first section 621 and a second section 622. Both the first and second sections 621, 622 are strip-shaped, and extend in the directions that intersect a height-adjusting direction of the headrest 40. Hence, during the height adjustment of the headrest 40, the width between the side bolsters 50 can be adjusted thxough the interaction of the driving mamber 61' and the guideway 62 to pivot the side bolsters 30.

In this embodiment, the driving member 61' is configured to be depressed (deformed) when the side bolster 50 is subjected to a side force so as to generate a tension that permits an inwardly pivoting movement of the side bolster 50 to thereby adjust the width between the side bolsters SO without having to adjust the height of the headrest 40. When the side fr-,1-ce is not applied to the side bolster 50, the depressed driving meober 61' is recovered to its original state, which generates a tens on that permits an outwardly pivoting movement of the side bolster 50 to a wider state.

With reference to FIG, 12, in this embodiment, the driving member 61' has a fixed end. 6111' fixed to the headrest 40, and a biasing-arm. 611' extending from the fixed &,1-1d 6111' to serve as the resilient structure and to terminate at an opposite connected end 6112' on which the guide stem. 612 is disposed.

The biasing arm. 611' has a. biasing portion 6113' interconnecting the fixed end 6112° and the connected end 6112', and inclined laterally and outwardly. When. the driving member 61° is subjected to a side force that is larger than the biasing-force of the biasing arm 611', the biasing portion 6113" is inflected to generate a tension that permits an inwardly pivoting movement of the side bolster 50.

In this embodiment, the biasing arm 611' is in form of a torsion spring made from steel or an iron wire_ With reference to EFL 14, the slidably connecting mechanism 70 of this embodiment includes a. guiding slot 71 formed in the backrest 30, and a guiding member 72 fixed to the side bolster 50 and slidably engaged in the guiding. slot 71 so as to restrain the displacement of the side bolster 50. Alternatively, the guiding slot 71 nay be formed in the side bolster 50 while the guiding member 72 is fixed to the backrest 30 to be slidaily engaged in the guiding slot 71.

With the width-adjustable side bolster mechanism 60 including the guideway 62 that is disposed in the side bolster 50, the driving member-61, 61' that is disposed on the headrest 40 to be slidably engaged in --guideway 62, and a resilient structure that is distDosed to either the driving memer 61, 61 or the guideway 62, the width between the side bolsters 50 can be adjusted through the slidable engagement of the it member 61, 61' with the guideway 62 during the height adjustment of the headrest 40.

Moreover, when a side force larger than the biasing force of the resilient structure is apc,iied to the s-idn. holster 50, the width between the side holsters 50 can he resiliently and conveniently adjusted without having Lo adjust the height of the headrest 40, which renders the child safety seat 1 simple in use.

We further describe arrangements as defined by El-E17 below: EJ. A width adjustable side bolster mechanism of a child safety seat for adjusting a width between side bolsters of the child safety seat, characterized by com:prising: a guideway disposed in one of the side bolsters; a driving member securedly disposed on a headrest of the child safety seat, and having a guide stem which is slidably engaged in said guideway to be moved along said guideway between a lower position, where the width between the side bolsters is smaller, and an upper position, where the width between the side holsters is larger; and a resilient structure disposed between the side bolster and a. main body of the child safet.y seat and providing a biasing force which keeps a contour of said guideway when said guide stem is moved between. the upper and lower positions, and which is overcome when a side force larger than the biasing. force is applied to the side bolster to permit. displacement of the Hide holster,o as t.o adjust the width between the bolsters.

El. The width-adjustable side bolster mechanism as defined in El, characterized ln that said guldewav extends in a direction that intersects a height-adjusting direction of the headrest relative to the main body of the child safety seat.

P3. The width-adjustable side bolster mechanism as defined in El, characterized in that said driving member has a fixed end fixed to the headrest, and a biasing arm extending from said fixed end to serve as said resilient structure and to terminate at an opposite connected end on which said guide stem disposed such that, when said driving member is sublected to the side force, said driving ne'rbe.r is deformed to permit a pivoting movement of the side bolster.

E4. The width-adjustable side bolster mechanism as defined in E2., characterized in that said biasing arm has a biasing portion interconnectHng qaHd f-Hxed end and said connected end and inclined laterally and outwardly so as to be inflected when said driving member is subjected to the side-force The width-adjustable side bolster mechanism as defined in E4, characterized in that said biasing arm is in form of a torsion spring.

Ed. The width--adjustable side bolster mechanism as defined in El, characterized by a biasing confining assenblv which is disposed on the side bolster to confine a border side wall of said guideway and which is configured to serve as said resilient structure such that, when the side bolster is subjected to the side force, said biasing confining assembly is deformed to permit a pivoting movement, of the side bolster.

E7. The width-adjustable side bolster mechanism as defined in Ed, characterized by an elongated slot which is formed in the, side bolster, said biasing confining assembly being pivotably disposed adjacent to a lateral e of said elongated slot to be turned relative to said elongated slot by the side force from a rst position, where said biasing confinthg assembly confines the border side wall of said guideway, to a second position, where said biasing confining assembly is deforTed to change the contour of said guideway.

ES. The width-adjustable side bolster mechanism as defined in Eh characterized in that said elongated slot has upper and lower sections, said upper section having a width larger than that of said lower section, said biani confining assembly being pivotatly disposed adlacent to said lower section and extending in said =per section to confine the border side wall of said guideway.

E9. The width-adjusta-cje side bolster mechanism as defined in E7, characteri 7E.d in that said biasing cnnfinlna assemblLv include,: a confining member pivotably disposed to the side bolster at a pivot end thereof, and a biasing member disposed between said Gann-fling member and the side bolster to bias said confining member toward the first p051 tion.

E10. The width-adjustable side bolster mechanism as defined in E9, characterized in that said biasing member abuts against a biased end of said confining member that is opposite-to said pivot end, and against the s-ide bolster, said confinng member having a holding portion which defines an accommodation space for holding said biasing. member therein.

Ell. The width-adjustable side bolster mechanism as defined in E9, characterized in that said basing confining assemtLy further includes an abutted member which is disposed on the side bolster and which faces said biasing member, said confining member having an abutting portion which projects to abut against said abutted member so as to retain said confining member in the first. position.

E12. The width-adjustable side bolster mechansm as defined in ES, characterized in that said biasing confining assembly further includes a stabilizing member which is disposed on the side bolster, said confining member having frictionally engaging portion which is frictionally and slidably engaged with said stabilizing member so as to stabilize the turning of said confining member.

E13. The width-adjust ble side bolster mnecbani.sm as defined in EE, characteri7ed in that sald driving member has a d-riving shaft which is securedly disposed on the headrest, said guide stem being fixed to an end portion of said driving shaft to be moved along said guideway alonc with a height adjustment of the headrest.

E14. A child safety seat comprising a seat bottom, a backrest connected to said seat bottom, a headrest slidably connected to said backrest, and two side bolsters respectively disposed on two lateral sides of said backrest, characterized by further comprising a width-adjustable side bolster mechanism as defined in any one of 1. to Elf.

£15. The child safety seat as defined in E14, characterized in that each of said side bolsters has an upper end slidably connected to said backrest, and a lower end pivotably connected to said backrest.

716. The chili safety seat as defined in £15, characterized in that one of said backrest and said side holster has a guiding slot, and the other one of said backrest and said side bolster has a guiding member which is slidably enuaged in said guiding slot.

717. The child safety seat as defined in E14 characterized in that said headrest has an operating portion which is operable to adjust a height of said headrest relative to said backrest.

Claims

Claims What is claimed: 1. A mechanism (60) for adjusting a width between side bolster (50) of a child safety seat (1), the child safety seat (1) comprising: a main body; and two side bolsters (50), wherein the mechanism (60) is adapted to adjust a width between the side bolsters (50) such that the width is smaller when a headrest (40) of the child safety seat (1) is moved into a lower position, and the width is larger when the headrest (40) is moved into an upper position.
2. The mechanism (60) as claimed in claim 1, further comprising a resilient structure disposed between a side bolster (50) and the main body, the resilient structure providing a biasing force acting on the side bolster (50).
3. The mechanism (60) as claimed in claim 2, wherein the resilient structure allows the biasing force to be overcome when a side force larger than the biasing force is applied to the side bolster (50) to permit a displacement of the side bolster (50) so as to adjust the width between the side bolsters (50).
4. The mechanism (60) as claimed in claim 3, wherein the resilient structure permits the displacement of the side bolster (50) to a state of smaller width between the side bolsters (50) when the side force is larger than the biasing force, in particular without having to adjust a height of the headrest (40).
5. The mechanism (60) as claimed in claim 3 or 4, wherein the mechanism (60) is adapted to permit the side bolsters (50) to be turned toward each other to change the width therebetween when the side force is applied, in particular without the need to adjust a height of the headrest (40).
6. The mechanism (60) as claimed in any of claims 2 -5, wherein the resilient structure generates a tension that permits an outwardly pivoting movement of the side bolster (50) to a state of larger width between the side bolsters (50) when the side force is not applied.
7. The mechanism (60) as claimed in any of claims 2 -6, wherein the resilient structure comprises a biasing spring (632).
8. The mechanism (60) as claimed in any of claims 2 -7, wherein the resilient structure comprises a torsion spring (611'), in particular a torsion spring (611') made from steel or an iron wire.
9. The mechanism (60) as claimed in any of the claims 2 -8, wherein the resilient structure is disposed between the side bolster (50) and the headrest (40).
10. The mechanism (60) as claimed in any of claims 2 -9, wherein the mechanism (60) is adapted to pivot the side bolsters (50) synchronously during a height adjustment of the headrest (40) to adjust the width between the side bolsters (50).
11. The mechanism (60) as claimed in any of claims 2 -10, further comprising: a guideway (62) disposed in one of the side bolsters (50); and a driving member (61, 61') securedly disposed on the headrest (40), and having a guide stem (612) which is slidablv engaged in the guideway (62) to be moved along the guideway (62) between the lower position, where the width between the side bols7ers (50) is smaller, and the upper position, where the width between the side bolsters (50) is larger; and wherein the biasing force keeps a contour of said guideway (62) when said guide stem (612) is moved between the upper and lower positions.
12. The mechanism (60) as claimed in claim 11, wherein the guideway (62) extends in a direction that intersects a height-adjusting direction of the headrest (40) relative to the main body of the child safety seat (1).
13. The mechanism (60) as claimed in claim 11 or 12, wherein the driving member (61') has a fixed end (6111') fixed to the headrest (40), and a biasing arm (611') extending from the fixed end to serve as the resilient structure and to terminate at an opposite connected end (6112') on which the guide stem (612) is disposed such that, when the driving member (61') is subjected to the side force, the driving member (61') is deformed to permit a pivoting movement of the side bolster (50).
14. The mechanism (60) as claimed in claim 13, wherein the biasing arm (611') has a biasing portion (6113') interconnecting the fixed end (6111') and the connected end (6112') and inclined laterally and outwardly so as to be inflected when the driving member (61') is subjected to the side force.
15. The mechanism (60) as claimed in claim 13 or 14, wherein the biasing arm (611') is in form of a torsion spring.
16. The mechanism (60) as claimed in claim 11 to 15, comprising a biasing confining assembly (63) which is disposed on the side bolster (50) to confine a border side wall of the guideway (62) and which is configured to serve as the resilient structure such that, when the side bolster (50) is subjected to a side force, the biasing confining assembly (63) is deformed to permit a pivoting movement of the side bolster (50).
17. The mechanism (60) as claimed in claim 16, comprising an elongated slot (62') which is formed in the side bolster (50), the biasing confining assembly (63) being pivotably disposed adjacent to a lateral side of the elongated slot (62') to be turned relative to the elongated slot (62') by the side force from a first position, where the biasing confining assembly (63) confines the border side wall of the guideway (62), to a second position, where the biasing confining assembly (63) is deformed to change the contour of the guideway (62).
18. The mechanism (60) as claimed in claim 17, wherein the elongated slot (62') has upper and lower sections (621', 622), the upper section (621') having a width larger than that of the lower section (622), the biasing confining assembly (63) being pivotably disposed adjacent to the lower section (622) and extending in the upper section (621') to confine the border side wall of the guideway (62).
19. The mechanism (60) as claimed in any of claims 16 to 18, wherein the biasing confining assembly (63) includes a confining member (631) pivotably disposed to the side bolster (50) at a pivot end thereof, and a biasing member (632) disposed between the confining member (631) and the side bolster (50) to bias the confining member (631) toward the first position.
20. The mechanism (60) as claimed in claim 19, wherein the biasing member (632) abuts against a biased end of the confining member (631) that is opposite to the pivot end, and against the side bolster (50), the confining member (631) having a holding portion (6311) which defines an accommodation space for holding the biasing member (632) therein.
21. The mechanism (60) as claimed in claim 19 or 20, wherein the biasing confining assembly (63) further includes an abutted member (52) which is disposed on the side bolster (50) and which faces the biasing member (632), the confining member (631) having an abutting portion (6312) which projects to abut against the abutted member (52) so as to retain the confining member (631) in the first position.
22. The mechanism (60) as claimed in any of the claims 19 to 21, wherein the biasing confining assembly (63) further includes a stabilizing member (53) which is disposed on the side bolster (50), the confining member (631) having a frictionally engaging portion (6313) which is frictionally and slidably engaged with the stabilizing member (53) so as to stabilize the turning of the confining member (631).
23. The mechanism (60) as claimed in any of the claims 11 to 22, wherein the driving member (61) has a driving shaft (611) which is securedly disposed on the headrest (40), the guide stem (612) being fixed to an end portion of the driving shaft (611) to be moved along the guideway (62) along with a height adjustment of the headrest (40).
24. The mechanism (60) as claimed in any one of the preceding claims, wherein the child safety seat (1) comprises a seat bottom (20) and a backrest (30) connected to the seat bottom (20), wherein the headrest (40) is slidably connected to the backrest (30), and wherein the side bolsters (50) are respectively disposed on two lateral sides of the backrest (30).
25. A mechanism (60) for adjusting a width between side bolsters (50) of a child safety seat (1); wherein the mechanism (60) is disposed between at least one of the side bolsters (50) and a headrest (40) of the child safety seat (1); wherein the mechanism (60) is adapted to pivot the side bolsters (50) synchronously during a height adjustment of the headrest (40) to adjust a width between the side bolsters (50); and wherein the mechanism (60) is adapted to permit the side bolsters (50) to be turned toward each other to change the width therebetween when a side force is applied to the at least one of the side bolsters (50), without the need to adjust a height of the headrest (40).
26. The mechanism (60) as claimed in claim 25, wherein the mechanism (60) comprises a resilient structure that provides a biasing force acting on said at least one of the side bolsters (50).
27. The mechanism (60) as claimed in claim 26, wherein the resilient structure allows the biasing force to be overcome when a side force larger than the biasing force is applied to said at least one of the side bolsters (50) to permit a displacement of the at least one side bolster (50) so as to adjust the width between the side bolsters (50).
28. A child safety seat (1) comprising a seat bottom (20), a backrest (30) connected to the seat bottom (20), a headrest (40) slidably connected to the backrest (30), two side bolsters (50), and a mechanism (60) as claimed in any one of the preceding claims.
29. The child safety seat (1) as claimed in claim 28, wherein each of the side bolsters (50) has an upper end slidably connected to the backrest (30), and a lower end pivotably connected to the backrest (30).
30. The child safety seat (1) as claimed in claim 28 or 29, wherein one of the backrest (30) and the side bolster (50) has a guiding slot (71), and the other one of the backrest (30) and the side bolster (50) has a guiding member (72) which is slidably engaged in the guiding slot (71).
31. The child safety seat (1) as claimed in any of claims 28 to 30, wherein the headrest (40) has an operating portion (41) which is operable to adjust a height of the headrest (40) relative to the backrest (30).
32. The child safety seat (1) as claimed in any of claims 28 to 31, wherein the two side bolsters (50) are respectively disposed on two lateral sides of the backrest (30).