DE102017012331B3 - Child safety seat and mechanism for adjusting the distance between the side bolsters - Google Patents

Abstract

A mechanism (60) for adjusting a distance between seat bolsters (50) of a child safety seat (1) comprising a main body and a pair of seat bolsters (50), the mechanism (60) comprising: a resilient element interposed between a seat bolster (50 ) and the main body and provides a biasing force which acts on the seat cheek (50); wherein the mechanism (60) is configured to adjust a distance between the pair of seat cheeks (50) such that the distance is smaller when a headrest (40) of the child safety seat (1) is moved to a lower position, and the distance is greater when the headrest (40) is moved to an upper position; wherein the resilient element allows the biasing force to be overcome when one of the biasing force excessive lateral force is applied to the seat cheek (50), whereby a displacement of the seat cheek (50) is made possible, so that the distance between the seat cheeks (50) is adjusted becomes.

Description

The disclosure relates to a child safety seat and in particular to a child safety seat with a mechanism for adjusting the distance between the seat bolsters.

With the widespread use of child seats, more functions are required of child seats. A child seat should be practical to operate and use and, moreover, offer a child accommodated in it safety and comfort.

Child safety seats or car seats are well known for mounting in a vehicle to protect children from injury or death in the event of a vehicle collision. Car seats generally include a seat bottom, a backrest connected to the seat bottom, and a headrest and seat bolsters connected to the backrest. The headrest and seat cheeks are adjustable relative to the backrest to accommodate children of different sizes. In a conventional child safety seat, a height adjustment of the headrest relative to the backrest can trigger a pivoting movement of the seat cheeks in order to adjust the distance between the seat cheeks. The disadvantage of such a child safety seat, however, is that when several child safety seats are attached to the rear seat of a vehicle, the side bolsters of the adjacent safety seats interfere with one another or hit the vehicle door. As such, an adjustment of the headrest leads to a change in the distance between the seat bolsters, which is unfavorable in use.

The patent specification DE 10 2006 043 760 B4 discloses a child seat for vehicles in which a height adjustment of the headrest is firmly coupled with a lateral movement of the shoulder rest parts, so that a lateral adjustment of the shoulder rest parts always takes place simultaneously with a height adjustment of the headrest and vice versa. Similar child seats are from the DE 10 2008 002 822 A1 and the DE 20 2005 013 453 U1 previously known.

It is therefore an object of the disclosure to provide a mechanism for adjusting the distance between the seat cheeks and a child safety seat provided therewith, which improves the handling of the child safety seat and enables a more flexible use of the child safety seat. The object is achieved by a mechanism according to claim 1, a mechanism according to claim 20 and a child safety seat according to claim 23.

According to the disclosure, the mechanism for adjusting the distance between the seat bolsters of a child safety seat is used to adjust the distance between the seat bolsters of the child safety seat. The mechanism for adjusting the distance between seat cheeks comprises a guide arranged in one of the seat cheeks, an operating element which is arranged and / or fastened securely to the headrest of the child safety seat and has a guide web which slidably engages in the guide in order to move along it move between a lower position, in which the distance between the seat cheeks is smaller, and an upper position, in which the distance between the seat cheeks is greater; and a resilient element which is arranged between the seat cheek and the main body of the child safety seat and provides a biasing force which follows the contour of the guide when the guide bar is moved between the upper and lower positions and which is overcome when a biasing force exceeds the biasing force Side force is applied to the seat cheek in order to allow a displacement of the seat cheek in order to adjust the distance between the cheeks.

According to the disclosure, the child safety seat comprises a seat base, a backrest connected to the seat base, a headrest displaceably connected to the backrest, and two seat bolsters, which are each arranged on a side surface of the backrest. The child safety seat further comprises a mechanism for adjusting the distance between seat bolsters as described above.

• 1 ist eine perspektivische Ansicht und zeigt eine Ausführungsform eines Kindersicherheitssitzes gemäß der Offenbarung;
• 2 ist eine perspektivische Ansicht und zeigt die Ausführungsform, wobei die Kopfstütze und die Sitzwangen des Kindersicherheitssitzes in einem ersten Zustand sind;
• 3 ist eine perspektivische Ansicht und zeigt die Ausführungsform, wobei die Kopfstütze und die Sitzwangen in einem zweiten Zustand sind;
• 4 ist eine perspektivische Vorderansicht der 2;
• 5 ist eine perspektivische Hinteransicht der 2;
• 6 ist eine perspektivische Ansicht der in 5 gezeigten Ausführungsform, wobei eine hintere Schale und eine Seitenschale zur besseren Darstellung weggebrochen sind;
• 7 ist eine vergrößerte Ansicht des eingekreisten Bereichs (A) in 6;
• 8 ist eine perspektivische Explosionsansicht einer Sitzwange gemäß 6;
• 9 ist eine schematische Ansicht und zeigt den Zustand, in welchem auf die Sitzwangen des Kindersicherheitssitzes keine Seitenkraft aufgebracht wird;
• 10 ist eine schematische Ansicht und zeigt den Zustand, in welchem auf die Sitzwangen gemäß 9 eine Seitenkraft aufgebracht wird;
• 11 ist eine perspektivische Ansicht und zeigt eine weitere Ausführungsform eines Kindersicherheitssitzes gemäß der Offenbarung;
• 12 ist eine perspektivische Detailansicht eines Bedienungselements gemäß 11; und
• 13 bis 15 sind perspektivische Ansichten entsprechend 11, jedoch aus anderen Blickwinkeln.

Further features and advantages of the disclosure will emerge from the following detailed description of the embodiments with reference to the accompanying drawings, which show:

• 1 Fig. 3 is a perspective view showing an embodiment of a child safety seat in accordance with the disclosure;
• 2 Fig. 3 is a perspective view showing the embodiment with the headrest and seat cheeks of the child safety seat in a first state;
• 3 Fig. 3 is a perspective view showing the embodiment with the headrest and seat bolsters in a second state;
• 4th FIG. 13 is a front perspective view of FIG 2 ;
• 5 FIG. 13 is a rear perspective view of FIG 2 ;
• 6th FIG. 3 is a perspective view of the FIG 5 embodiment shown, wherein a rear shell and a side shell are broken away for better illustration;
• 7th FIG. 13 is an enlarged view of the circled area (A) in FIG 6th ;
• 8th FIG. 13 is an exploded perspective view of a seat cheek according to FIG 6th ;
• 9 Fig. 13 is a schematic view showing the state in which no side force is applied to the seat bolsters of the child safety seat;
• 10 FIG. 13 is a schematic view showing the state in which the seat bolsters in FIG 9 a side force is applied;
• 11 Fig. 3 is a perspective view showing another embodiment of a child safety seat in accordance with the disclosure;
• 12th FIG. 3 is a perspective detailed view of an operating element according to FIG 11 ; and
• 13th to 15th are perspective views, respectively 11 , but from different angles.

Before the disclosure is described in detail, it should be noted that the reference symbols or additions to the reference symbols are repeated at a suitable point in the figures in order to indicate corresponding or analogous elements which may have the same properties.

Now the 1 to 5 Reference, wherein one embodiment of a child safety seat according to the disclosure comprises: a base member 10 , one on the primitive 10 attached seat base 20th , one to the rear of the seat bottom 20th connected backrest 30th , one to the top of the backrest 30th movably connected headrest 40 , and two side bolsters 50 each on a corresponding side surface of the backrest 30th are arranged.

Furthermore, the headrest 40 an operating section 41 on (cf. 5 ), which is used to adjust the height of the headrest 40 relative to the backrest 30th is actuatable.

Now the 6th Reference is made in which the child safety seat 1 also a mechanism 60 includes for adjusting the distance between seat cheeks, that between the headrest 40 and one of the seat cheeks 50 is arranged. While the height of the headrest 40 is adjusted, the seat cheeks 50 by means of the mechanism 60 to adjust the distance between the seat cheeks are pivoted at the same time to the distance between the seat cheeks 50 adjustable to comfortably accommodate children of different sizes. On the other hand, the seat cheeks 50 when they are further apart and an object exerts a side force on the seat cheeks 50 to be turned towards each other in order to change the distance between them without reducing the height of the headrest 40 must be adjusted in order to reduce the impact of the object in this way.

Now it is again on the 6th Reference is made, wherein in this embodiment each seat bolster 50 has a lower end pivotable with the seat back 30th is connected so that there is a height adjustment of the headrest 40 with is pivoted, and an upper end, which by means of a sliding connection mechanism 70 movable with the backrest 30th is connected to thus create an alternative space for the seat cheek 50 when a side force is applied to it.

In particular, the slidable connection mechanism comprises 70 a guide slot 71 and one slidable in the guide slot 71 engaging guide element 72 . The guide slot 71 is either in the backrest 30th or a seat cheek 50 formed while the guide element 72 on the other part, i.e. the backrest 30th or the seat cheek 50 is attached. In this embodiment the guide slot is 71 in the upper end of the seat cheek 50 formed, and the guide element 72 is on the backrest 30th attached and extends through the guide slot 71 to move the seat cheek 50 relative to the guide element 72 to allow.

Now the 9 and 10 Referenced, wherein a strut 31 on the backrest 30th is arranged to move the seat cheek 50 to limit when on the seat cheek 50 a side force is applied.

As in 4th to 10 shown is the construction of the mechanism 60 to adjust the distance between the seat bolsters of the child safety seat 1 described in detail below.

Now the 4th , 6th and 7th Referred to in what the mechanism 60 an operating element to adjust the distance between the seat bolsters 61 and a guided tour 62 having. The leadership 62 is in the seat cheek 50 arranged and has a first section 621 and one relative to the first section 621 inclined second section 622 on. The first or second section 621 , 622 both each extend in the direction that is one direction of the headrest 40 for height adjustment relative to the backrest 30th cuts (cf. 7th ). The control element 61 is on the headrest 40 attached and slidable in the leadership 62 fitted. On the lead 62 a resilient element is arranged. During the height adjustment of the headrest 40 is the distance between the seat cheeks 50 adjustable by means of the interaction of the control element 61 with the guide 62 for swiveling the seat cheeks 50 . If on the seat cheek 50 If a side force is applied, the resilient element deforms on the guide 62 and creates a tension that causes a pivoting movement of the seat cheek 50 inwards, thus reducing the distance between the seat cheeks 50 to be adjusted without changing the height of the headrest 40 having to adjust.

As in 4th is shown, the control element 61 an operating shaft on 611, which is on the headrest 40 is attached, and a guide bar 612 , the one on the end portion of the operating shaft 611 is attached. The guide bar 612 slidably engages in the guide 62 one so that when moving the headrest 40 in the vertical to adjust the height of the operating shaft 611 with moves and the guide bar 612 along the guide 62 is taken between a lower position in which the distance between the seat cheeks 50 is less, and an upper position in which the distance between the seat bolsters 50 is larger, so as to adjust the distance between the seat cheeks 50 perform.

In this embodiment, the backrest 30th a sliding slot 32 on, which extends in the vertical direction. The guide bar 612 extends slidably through the slide slot 32 to control the movement of the guide bar 612 respectively.

Now the 6th to 8th Reference in which the seat cheek 50 a flange 51 and one on one side of the flange 51 trained long slot 62 ' has (cf. 8th ). A preload limit 63 is pivotable between the long slot 62 ' and the flange 51 arranged for movement between a first position remote from the flange 51 and a second position near the flange 51 . In the first position, the preload limiter extends 63 to the top of the long slot 62 ' so that the preload limit 63 a lateral boundary wall of the guide 62 includes (cf. 7th ). The long slot 62 ' has a side wall 620 ' away from the flange 51 to another lateral boundary wall of the guide 62 to include. The guide bar 612 can be moved into the guide 62 fitted. In this state, the guide bar 612 when shifting upwards to the preload limit 63 act to pivot the seat cheek 50 trigger. The preload limit 63 becomes during the displacement of the guide bar 612 held up in the first position to the contour of the guide 62 to follow. When shifted downwards, the guide bar 612 on the side wall 620 ' of the long slot 62 ' act (ie the other lateral boundary wall of the guide 62 ) to swivel the seat cheek 50 to trigger in the opposite direction.

If on the seat cheek 50 a side force is applied, then the guide bar 612 operated to limit the preload 63 deform so that the preload limit 63 is moved from the first position to the second position to generate a tension that causes an inward pivoting movement of the seat side bolster 50 allows to adjust the distance between the seat cheeks 50 to be adjusted without the headrest 40 to have to adjust the height.

As in 7th and 8th is shown is an abutment element 52 on the seat cheek 50 arranged and extending from the upper end wall of the elongated slot 62 ' upwards so that the preload limit 63 in the first position by means of a pretensioning force on the contact element 52 rests to the contour of the bias limiter 63 limited leadership 62 and the long slot 62 ' to follow (cf. 7th ) when the guide bar 612 is moved between the upper and lower positions.

Now the 8th Reference is made in which the elongated slot 62 ' a sector-shaped upper section 621 ' and a strip-shaped lower portion 622 includes. The distance of the top section 621 ' gradually enlarges from the lower end to the upper end and is larger than that of the lower portion 622 . If a side force that exceeds the pre-tensioning force is applied, then the seat cheek becomes 50 relative to the backrest 30th moved, and the design of the top section 621 ' may have room for the guide bar to move 612 provide.

Now the 7th to 9 Referred to in which the bias limit 63 serves as a resilient element and a locking element 631 includes that to the seat cheek 50 is pivotably arranged, namely at the lower pivot end, which is adjacent to a longitudinal side of the elongated slot 62 ' and adjacent to the lower section 622 and a biasing element 632 that is attached to the locking element 631 and the flange 51 rests to the locking element 631 pretension in the first position. In this embodiment the biasing element is 632 a biasing spring attached to an upper, biased end of the locking element 631 is applied, which is opposite to the lower pivot end, and on the flange 51 to provide a preload force so that the upper preloaded End of the locking element 631 on the plant element 52 can apply. The locking element thus acts 631 with the side wall 620 ' of the long slot 62 ' together to take the lead 62 for moving the guide bar 612 define. The guide bar 612 can swivel the seat cheek 50 through the interaction of the guide bar 612 with the guide 62 trigger.

The biasing element 632 can also consist of a torsion spring attached to the lower pivot end of the locking element 631 is arranged.

Now the 7th to 9 Reference is made in which the locking element 631 located in the upper section 621 ' extends and at the upper pivot end a holding portion 6311 which defines a receiving space around the biasing element 632 to keep in it, and an investment part 6312 that protrudes so that it sticks to the stop element 52 compared to the biasing element 632 is applied so as to the locking element 631 to hold in the first position.

Furthermore, the locking element 631 a frictional engagement portion at its upper edge 6313 on. A stabilizer 53 is like that on the seat cheek 50 arranged that the frictional engagement area 6313 by means of frictional engagement and slidable in the stabilizer 53 engages to the pivoting movement of the locking element 631 to stabilize.

Now the 1 to 10 Referring now to the various states of the child safety seat 1 will be described in detail.

2 shows the headrest 40 and the seat cheeks 50 the child safety seat 1 in a first state, the headrest 40 in a lower position and the distance between the seat cheeks 50 is relatively low.

During the movement of the headrest 40 the guide bar is at the top 612 along the sliding slot 32 the backrest 30th moved as in 3 and 4th is shown. Through the interaction of the moving guide bar 612 with the side wall of the guide 62 (ie the biasing force of the biasing element 632 acts on the locking element 631 to ensure a constant contact of the locking element 631 on the plant element 52 to cause the contour of the guide 62 to follow as in 6th and 7th shown) the seat cheeks 50 Pivot outwards so that there is the distance between the seat cheeks 50 enlarge. When the adjustment is complete, the headrest is in place 40 in an upper position and the distance between the seat bolsters 50 is relatively large. As in 3 and 9 shown is the guide bar 612 by the pretensioning force of the pretensioning element 632 held in this position. On the other hand, the prestressing force of the prestressing element 632 through one on the seat cheek 50 applied side force can be overcome. This is described in detail as follows.

If on the seat cheeks 50 the child safety seat 1 in the in 9 If a lateral force is applied due to an action on the seat cheek of another child safety seat or a car door, the seat cheek moves 50 relative to the backrest 30th in the in 10 shown condition. The locking element rotates during this movement 631 relative to the long slot 62 ' from the first position to the second position in which the biasing element 632 is depressed (deformed) to create tension that causes the seat cheek to pivot inward 50 leads to thereby the distance between the seat cheeks 50 decrease until the locking element 631 on the flange 51 as in 10 shown. This means that the distance between the seat bolsters can be adjusted 50 feasible without reducing the height of the headrest 40 having to adjust. If there is no side force on the seat cheek 50 is applied, the biasing element 632 returned to its original state, which creates a tension that causes a pivoting movement of the seat cheek 50 to the outside at a wider distance.

In a modified embodiment, the is on the locking element 631 applied prestressing force of the prestressing element 632 not sufficient to during the sliding movement of the guide bar 612 up to a front part of the top section 621 ' of the long slot 62 ' the contour of the guide 62 to follow. The locking element 631 is moved here to the contour of the guide 62 to vary so that the distance between the seat cheeks changes 50 be absorbed when an external force is applied laterally and inwards on the seat cheek 50 is applied. In this embodiment, when the guide web 612 along the sliding slot 32 to the back of the top section 621 ' is moved further upwards, which is on the locking element 631 acting pretensioning force of the pretensioning element 632 sufficient to cause a concern of the locking element 631 on the plant element 52 to allow. The contour of the leadership 62 is namely restored so that a pivoting movement of the seat cheek 50 is triggered to the outside.

When the height of the headrest 40 of the state according to 3 in the state according to 2 is adjusted, then the guide bar acts 612 on the side wall 620 ' of the long slot 62 ' one so that one on the side wall 620 ' applied horizontal force component of the guide bar 612 an inward pivoting movement of the seat cheeks 50 can trigger so as to reduce the distance between them.

Now the 11 to 15th Reference will now be made to a further embodiment of the child safety seat according to the disclosure.

According to the 11 to 13th includes the mechanism 60 the control element to adjust the distance between the seat bolsters 61 ' that on the headrest 40 is attached, and one in the seat cheek 50 arranged leadership 62 for sliding engagement with the control element 61 ' . The leadership 62 has a first section 621 and a second section 622 on. The first and the second section 621 , 622 are both strip-shaped and each extend in the direction that the direction of height adjustment of the headrest 40 cuts. Thus, the headrest is during the height adjustment 40 the distance between the seat cheeks 50 adjustable due to the interaction of the control element 61 ' with the guide 62 for swiveling the seat cheeks 50 .

In this embodiment, the control element 61 ' designed to be indented (deformed) when on the seat cheek 50 a side force is applied to create a tension that causes a pivoting movement of the seat cheek 50 inwards, thus reducing the distance between the seat cheeks 50 to be adjusted without changing the height of the headrest 40 having to adjust. If there is no side force on the seat cheek 50 is applied, the pressed-in control element 61 ' returned to its original state, creating a tension that causes a pivoting movement of the seat cheek 50 to the outside at a wider distance.

Now the 12th Referenced; in this embodiment, the control element 61 ' one on the headrest 40 attached fixed end 6111 ' on as well as a preload arm 611 ' that is from the fixed end 6111 ' extends and serves as a compliant member and at an opposite, connected end 6112 ' ends where the guide bar 612 is arranged. The preload arm 611 ' has a preload area 6113 ' on, of the fixed end 6111 ' with the connected end 6112 ' connects and is inclined to the side and outward. When on the control element 61 ' one the biasing force of the biasing arm 611 ' excessive lateral force is applied, becomes the preload area 6113 ' bent to create tension that causes the seat cheek to pivot 50 allows inside.

In this embodiment, the biasing arm 611 ' takes the form of a torsion spring made of steel or iron wire.

Now the 14th Referenced; the sliding link mechanism 70 This embodiment includes one in the seat back 30th trained guide slot 71 and one on the seat cheek 50 attached guide element 72 that can be slid into the guide slot 71 intervenes so as to shift the seat cheek 50 to limit. Alternatively, the guide slot 71 in the seat cheek 50 be formed while the guide element 72 for sliding engagement in the guide slot 71 on the backrest 30th is attached.

With the mechanism 60 for adjusting the distance between seat cheeks, including those in the seat cheek 50 arranged leadership 62 that is on the headrest 40 arranged control element 61 , 61 ' for sliding engagement in the guide 62 , and one either on the control element 61 , 61 ' or the tour 62 arranged resilient element, is the distance between the seat bolsters 50 while adjusting the height of the headrest 40 due to the sliding engagement of the operating elements 61 , 61 ' into the lead 62 adjustable. If, in addition, on the seat cheek 50 a lateral force that exceeds the pretensioning force of the resilient element is applied, the distance between the seat cheeks 50 resilient and easy to adjust without changing the height of the headrest 40 having to adjust what the use of the child safety seat 1 simplified.

Claims (26)

A mechanism (60) for adjusting a distance between seat bolsters (50) of a child safety seat (1) comprising a main body and a pair of seat bolsters (50), the mechanism (60) comprising: a resilient member disposed between a seat cheek (50) and the main body and providing a biasing force acting on the seat cheek (50); wherein the mechanism (60) is adapted to adjust a distance between the pair of seat bolsters (50) such that the distance is smaller when a headrest (40) of the child safety seat (1) is moved into a lower position, and the distance is greater when the headrest (40) is moved to an upper position; wherein the resilient element allows the pretensioning force to be overcome when a lateral force exceeding the pretensioning force is applied to the seat cheek (50), whereby a displacement of the seat cheek (50) is made possible so that the distance between the seat cheeks (50) is adjusted. Mechanism (60) according to Claim 1 , wherein the resilient element allows the displacement of the seat cheek (50) in a state of a smaller distance between the pair of seat cheeks (50) when the side force is greater than the pretensioning force, in particular without the need to adjust a height of the headrest (40) is. The mechanism (60) of any preceding claim, wherein the resilient member creates a tension that allows outward pivoting movement of the seat cheek (50) to a state of greater spacing between the pair of seat cheeks (50) when the side force is not applied. The mechanism (60) according to any one of the preceding claims, wherein the resilient element is disposed between the seat cheek (50) and the headrest (40). Mechanism (60) according to one of the preceding claims, wherein the mechanism (60) is designed to pivot the seat bolsters (50) synchronously during a height adjustment of the headrest (40), so that the distance between the seat bolsters (50) is adjusted. Mechanism (60) according to one of the preceding claims, wherein the mechanism (60) is set up to enable pivoting of the seat cheeks (50) towards one another. so that the distance between them is changed and the side force is applied without having to adjust the height of the headrest (40). Mechanism (60) according to one of the preceding claims with additionally: a guide (62) arranged in one of the seat cheeks (50); and an operating element (61, 61 ') arranged securely on the headrest (40), comprising a guide web (612) which for movement along the guide (62) engages displaceably in the guide (62) between the lower position in which the distance between the seat cheeks (50) is smaller, and the upper position, in which the distance between the seat cheeks (50) is greater; and wherein the biasing force follows a contour of the guide (62) when the guide web (612) is moved between the upper and lower positions. Mechanism (60) according to Claim 7 wherein the guide (62) extends in a direction intersecting a direction of height adjustment of the headrest (40) relative to the main body of the child safety seat (1). Mechanism (60) according to Claim 7 or 8th wherein the operating member (61 ') has a fixed end (6111') attached to the headrest (40) and a biasing arm (611 ') extending from the fixed end and serving as the compliant member and connected to an opposite End (6112 ') ends at which the guide web (612) is arranged, so that when the side force is applied to the operating element (61'), the operating element (61 ') is deformed so that a pivoting movement of the seat cheek ( 50) is allowed. Mechanism (60) according to Claim 9 wherein the biasing arm (611 ') includes a biasing portion (6113') connecting the fixed end (6111 ') to the connected end (6112') and inclined sideways and outward so that it is bent over when the side force is applied to the operating element (61 '). Mechanism (60) according to Claim 9 or 10 , wherein the preload arm (611 ') is designed as a torsion spring. Mechanism (60) according to one of the Claims 7 to 11 with a preload limiter (63) which is arranged on the seat cheek (50) so that the preload limiter (63) delimits a lateral boundary wall of the guide (62), and wherein the preload limiter (63) is designed to act as the flexible element to serve so that the preload limiter (63) is deformed when the side force is applied to the seat cheek (50) so that a pivoting movement of the seat cheek (50) is permitted. Mechanism (60) according to Claim 12 with an elongated slot (62 ') which is formed in the seat cheek (50), wherein the preload limiter (63) is arranged pivotably adjacent to a longitudinal side of the elongated slot (62') so that it can be moved relative to the elongated slot (62 ') by the lateral force ) can rotate from a first position in which the preload limiter (63) limits the lateral boundary wall of the guide (62) to a second position in which the preload limiter (63) is deformed so that the contour of the guide (62) is changed . Mechanism (60) according to Claim 13 wherein the elongated slot (62 ') comprises an upper and a lower portion (621', 622), the upper portion (621 ') having a distance which is greater than that of the lower portion (622), wherein the preload limit ( 63) is arranged pivotably adjacent to the lower section (622) and extends into the upper section (621 '), so that the lateral boundary wall of the guide (62) is limited. Mechanism (60) according to one of the Claims 12 to 14th , wherein the preload limiter (63) comprises a locking element (631) which is pivotably arranged at a pivot end to the seat cheek (50), and a preloading element (632) which is arranged between the locking element (631) and the seat cheek (50), so that the locking element (631) is biased into the first position. Mechanism (60) according to Claim 15 , wherein the prestressing element (632) rests against a prestressed end of the blocking element (631), which is opposite to the pivoting end, and against the seat cheek (50), wherein the blocking element (631) has a holding section (6311) which defines a receiving space, so that the biasing element (632) is held therein. Mechanism (60) according to Claim 15 or 16 , wherein the preload limiter (63) further comprises a contact element (52) which is arranged on the seat cheek (50) and which lies opposite the prestressing element (632), wherein the locking element (631) has a contact part (6312) which is attached to the Contact element (52) rests, so that the locking element (631) is held in the first position. Mechanism (60) according to one of the Claims 15 to 17th , wherein the preload limiter (63) further comprises a stabilizer (53) which is arranged on the seat cheek (50), wherein the locking element (631) has a frictional engagement area (6313) which by means of frictional engagement and displaceably in the stabilizer (53 ) engages so that the rotation of the locking element (631) is stabilized. Mechanism (60) according to one of the Claims 7 to 18th , wherein the operating element (61) has an operating shaft (611) which is fastened to the headrest (40), the guide web (612) being fastened to an end section of the operating shaft (611) so that it can be moved when the headrest (611) is adjusted in height. 40) moved along the guide (62). Mechanism (60) for adjusting a distance between a pair of seat bolsters (50) of a child safety seat (1); wherein the mechanism (60) is arranged between at least one of the seat cheeks (50) and a headrest (40) of the child safety seat (1); wherein the mechanism (60) is set up to pivot the seat cheeks (50) synchronously during a height adjustment of the headrest (40), so that a distance between the seat cheeks (50) is adjusted; (50) and wherein the mechanism (60) is set up to enable the seat cheeks (50) to pivot towards one another, so that the distance between the seat cheeks (50) changes when a lateral force is exerted on the at least one seat cheek (50) without that a height of the headrest (40) must be adjusted. Mechanism (60) according to Claim 20 wherein the mechanism (60) comprises a compliant element that provides a biasing force acting on the at least one seat cheek (50). Mechanism (60) according to Claim 21 , wherein the resilient element allows the pretensioning force to be overcome when a lateral force that exceeds the pretensioning force is applied to the at least one seat cheek (50), whereby a displacement of the at least one seat cheek (50) is made possible so that the distance between the seat cheeks (50 ) is adjusted. Child safety seat (1), comprising a seat base (20), a backrest (30) connected to the seat base (20), a headrest (40) movably connected to the backrest (30), a pair of seat bolsters (50) and a mechanism (60) ) according to one of the preceding claims. Child safety seat (1) according to Claim 23 wherein each of the seat cheeks (50) has an upper end slidably connected to the backrest (30) and a lower end pivotably connected to the backrest (30). Child safety seat (1) according to Claim 23 or 24 wherein either the backrest (30) or the seat cheek (50) has a guide slot (71) and the other element, i.e. the backrest (30) or the seat cheek (50), has a guide element ( 72). Child safety seat (1) according to one of the Claims 23 to 25th wherein the headrest (40) has an actuating section (41) which can be actuated to adjust a height of the headrest (40) relative to the backrest (30).

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