CN111356624A

CN111356624A - Device for transporting a child and child seat

Info

Publication number: CN111356624A
Application number: CN201880073540.9A
Authority: CN
Inventors: 弗里克·德里森
Original assignee: Mutsy BV
Current assignee: Matesi World Co ltd
Priority date: 2017-09-14
Filing date: 2018-09-12
Publication date: 2020-06-30
Also published as: WO2019054863A3; NL2019551B1; WO2019054863A2; EP3681783A2

Abstract

The present invention relates to a device for transporting a child, such as a pram or buggy, and a child seat suitable for use in such a device. The child seat is here connected to the frame of the buggy by means of an attachment. According to the invention, the device comprises locking means for keeping the first pivot point between the backrest part and the seat part locked relative to the attachment part during folding of the seat from the recumbent position to the seat position, and for releasing this locking before or as a result of folding of the seat from the seat position to the folded position.

Description

Device for transporting a child and child seat

Technical Field

The present invention relates to a device for transporting a child, such as a pram or buggy, and a child seat suitable for such a device. An example of such a device is known from EP2895376a 1.

Background

The known device comprises a frame and a seat provided with a seat part and a backrest part, wherein the seat part and the backrest part are pivotable relative to each other about a first pivot point for the purpose of folding and unfolding the seat. The seat can here be folded from a lying position, via a sitting position, into a folded position. The known device further enables to include an attachment portion for attaching the seat to the frame. The seat is here pivotably connected to the attachment portion.

In the known device, the frame comprises a lower frame with rotating wheels on the front side and fixedly arranged wheels on the rear side. On the front side, the lower frame is pivotally connected to the upper frame. The upper frame includes a pair of lower tubes arranged in parallel with each other and pivotably coupled at upper sides thereof to the respective upper tubes. The push rod is telescopically received within the upper tube.

To fold the known device, the push rod is first placed in the lowermost position. The lower and upper tubes are then unlocked so that the upper tubes can pivot forward until they are progressively positioned substantially parallel to the lower tubes. The lower and upper frames are then unlocked so that the upper and lower tubes can pivot downwardly so that the upper frame gradually lies in substantially the same plane as the lower frame.

During the folding process, the seat can remain coupled to the upper frame. This is because the seat can be folded so as not to interfere with the folding. This is possible because the seat portion and the seatback portion of the seat are pivotally connected at a first pivot point. More specifically, the known device comprises a four-bar linkage, wherein the first arm is formed by an attachment. The portion is pivotally connected on a first side to the backrest portion and pivotally connected on a second side to a first end of a second arm. The second arm is pivotally connected to the seat at a second end. The part of the backrest part between the first pivot point and the pivot point between the backrest part and the attachment part forms a third arm and the part of the seat part between the first pivot point and the pivot point between the seat part and the second arm forms a fourth arm. Due to the four-bar linkage described above, during folding of the seat, the seat part will move backwards, while the backrest part gradually lies substantially in the same plane as the seat part. The advantage of the four-bar linkage is that the centre of gravity of the child relative to the lower frame does not change, or hardly changes, when the child moves from a sitting position to a lying position or vice versa.

In order to be able to transport the known device in, for example, a car boot, it is important to be able to fold the device into a package which is as compact as possible. It has been found that the compactness of the known device in the folded state may not be sufficient for certain applications.

Disclosure of Invention

It is therefore an object of the present invention to provide a device that can be folded into a compact package.

This object is achieved by a device according to claim 1, characterized in that the device further comprises locking means for keeping the first pivot point locked with respect to the attachment during folding of the seat from the recumbent position to the seat position and for releasing the locking prior to or as a result of folding of the seat from the seat position to the folded position.

According to the invention, the first pivot point will no longer be locked relative to the attachment at a given moment due to or before the folding of the seat from the seat into the folded position. This means that the position of the first pivot point is no longer fixed relative to the attachment. However, the seat is still pivotably connected to the attachment portion. According to the invention, it is thus possible to pivot the at least partially folded seat as a whole relative to the attachment. More specifically, the present invention allows the seat to pivot relative to the attachment portion while maintaining the relative positions of the back and seat portions constant. Thereby, during folding of the device, the folded seat can be better positioned relative to the frame, resulting in a more compact whole.

In the device known from EP2895376a1, a four-bar linkage causes pivotal movement of the seat portion relative to the attachment portion to be coupled with movement of the backrest portion. Therefore, it is not possible to pivot the folded seat as a whole with respect to the attachment portion, and the desired compactness cannot be achieved to a sufficiently large extent.

In addition to a more compact package after folding, the present invention also enables a lighter, less complex device. The seat can be further placed in a more flat position.

After releasing the lock, the pivoting of the backrest part relative to the seat part is preferably mechanically decoupled from the pivoting of the seat part relative to the attachment part.

The seat is preferably pivotably connected to the attachment portion at a second pivot point. The second pivot point can here have a constant position relative to the attachment portion during folding of the seat from the recumbent position to the folded position.

The frame can be provided with a lower frame provided with wheels and an upper frame pivotably coupled with the lower frame, wherein the attachment portion is releasably coupled to the upper frame and the frame can be folded by pivoting the upper frame and the lower frame relative to each other. The lower frame can here be formed by a pair of tubes, wherein the rotating wheel is coupled with the lower frame on the front side or on the rear side. For a device provided with four wheels, the tubes can be arranged parallel to each other. However, for a device provided with three wheels, the tubes may also approach each other in the forward direction.

The upper frame may include a pair of tubes or arms arranged parallel to each other. Telescopically adjustable push rods can be received in these tubes. The upper frame may further include a pair of down tubes and a pair of upper tubes, wherein the upper tubes are pivotally coupled to the down tubes and receive the push rods therein. Here, the upper frame can be folded by pivoting the upper tube towards the lower tube.

The locking device can be configured to release the locking as a result of the folding of the seat from the seating position to the folded position. In this embodiment, the locking can be released because the backrest portion pivots relative to the seat portion. This is in contrast to embodiments where the lock is released before the pivoting movement, for example by manual operation using an operating member lock. The locking device can be configured to keep the first pivot point locked relative to the attachment during a first part of the folding from the seat to the folded position and to release the locking during the remaining part of the folding. The degree of locking may gradually decrease until a certain relative position of the backrest part and the seat part is reached. In a defined relative position of the backrest part and the seat part, the locking is released. This is the case, for example, if there are two elements more or less engaged with each other, and the relative position of these elements changes during pivoting of the backrest part relative to the seat part.

The locking device may comprise a first locking element coupled to the attachment portion and a second locking element coupled to the seat, wherein the first and second locking elements are lockable relative to each other for the purpose of said locking of the first pivot point relative to the attachment portion. The second locking element can here be pivotably coupled to the seat, and the second locking element can be configured to pivot as a result of the folding of the seat, in order to thus release the locking between the first locking element and the second locking element.

In the above described embodiments, the device preferably comprises a resilient element, such as a torsion spring, for causing the second locking element to pivot under spring tension, wherein the spring tension is selected to cause the second locking element to rotate for the purpose of enabling locking with the first locking element.

In order to achieve a mechanical coupling between the pivotal movement of the backrest part relative to the seat part, the backrest part can be provided with a support member which defines a path on which the second locking element is supported. During folding of the seat from the sitting position to the folded position, the tip of the second locking element will here follow the path and cause the second locking element to rotate relative to the first locking element in order to break the lock between the first and second locking elements. For example, the support can be formed as a stop edge arranged around the first pivot point, wherein the distance between the first pivot point and the point at which the second locking element obtains support against the stop edge evolves as a function of the angular position of the support point.

The seat portion extends in a lateral direction on the attachment portion at least when the seat is in a sitting position, a lying position or an intermediate position, such that the seat portion rests on or contacts the attachment portion, thereby preventing downward movement of the seat relative to the attachment portion. This mechanical configuration may be considered a lock-down. The first locking element can further prevent upward movement of the seat relative to the attachment portion by engagement of the second locking element. This mechanical configuration may be considered an upward lock. By the combined action of the downward and upward locking, the seat can be fixed relative to the attachment element.

The second locking element may comprise an engagement portion and a follower fixedly connected to the engagement portion, wherein a tip of the follower is supported on the path and the engagement portion is configured to engage with the first locking element. Due to the fixed connection between the joint and the follower, the movement of the follower defined by the path, in particular the rotation of the follower, will result in a similar movement of the joint. The engagement portion may comprise a hook, and wherein the first locking element comprises a shaft or pin extending in the transverse direction.

The seat portion may include a bottom portion and side walls disposed on either side of and connected to the bottom portion. Each side wall is here connected at its upper side to an end. The end portion extends in a lateral direction to enable the end portion to be supported on the attachment portion at least in a sitting, lying or intermediate position of the seat, and wherein the second locking element is pivotably connected to the end portion. Each side wall can here be provided with a pair of side wall parts arranged parallel to each other, wherein the follower extends from the end part to a space between the pair of side wall parts, and the engagement part extends from the end part towards the first locking element mounted in the attachment part, at least when the seat is in the sitting, lying or intermediate position. In this way the mechanism of the follower and the support is protected from e.g. children.

The engagement portion can project on the underside of the end portion for the purpose of engaging the first locking element. As mentioned above, the first locking element may be embodied as a pin or shaft extending in a transverse direction, i.e. substantially parallel to the shaft on which the wheel is mounted. A shape that gives the attachment portion a partially open shape on the upper side, so that the first locking element can be engaged by the engagement portion.

In the above, the lock is released due to the relative pivotal movement of the backrest portion and the seat portion. However, it is also possible that the device comprises an operating member for operating the locking means for the purpose of said release of the locking. As an example, the locking device may be configured to release the lock only when the seat is in the sitting position or in the at least partially folded position. Preferably, operation of the operating member causes movement of the second locking element relative to the first locking element through the mechanical coupling, whereby the locking is released. In contrast to the above-described embodiment in which the lock is released due to the relative pivotal movement of the backrest portion and the seat portion, in this embodiment it is possible to choose to maintain the lock even if the seat is gradually in the fully folded state.

Preferably, the attachment portion comprises coupling means for coupling the attachment portion to the frame. For example, the coupling means can be configured to enable a snap connection with the frame. As an example, the coupling means may include a first coupling portion connected to the frame (more specifically, to the upper frame), and a second coupling portion connected to the seat. The first or second coupling part may here comprise a projection or pin which is under spring tension and which can engage in an opening or recess of the other of the first or second coupling part. By coupling the first coupling portion and the second coupling portion, the protrusion or pin will enter the opening or notch, thereby locking the seat to the frame. A further operating member may be provided to enable the seat to be removed from the frame for the purpose of moving the projection or pin against the spring tension.

The device may further be provided with a bumper bar pivotally connected at a third pivot point to the attachment portion. The device may further comprise a first arm connected to or having a constant position relative to the bumper bar, and a second arm pivotally connected at an end to the first arm and pivotally connected at a second end to the backrest portion at a distance from the first pivot point. Wherein the first and second arms are positioned such that the bumper bar rotates in the same direction as the backrest portion during folding of the seat. In this embodiment, movement of the bumper bar is mechanically coupled with pivotal movement of the backrest portion relative to the seat portion. The bumper bar has a constant position relative to the first arm because the first arm is connected to the bumper bar either directly or through an intermediate non-pivoting member.

The first and second arms preferably extend equally in the space between the side wall parts for the purpose of protecting these components. Further preferably, the third pivot point and the second pivot point are the same.

The device can be provided with a foot support which is pivotably mounted on the frame and in which there is a recess for partially receiving the buffer rod. When the seat is fully folded, the bumper bar will be received in the notch, making the device more compact.

According to a second aspect, the present invention provides a child seat adapted for use with a device for transporting a child as described above. Such a child seat comprises a seat part and a backrest part, wherein the seat part and the backrest part are pivotable relative to each other about a first pivot point for the purpose of folding and unfolding the seat. The child seat further comprises an attachment portion for attaching the seat to the frame of the device. The seat part is here pivotably connected to the attachment part and the seat can be folded from the lying position, via the seat position, into the folded position.

The child seat according to the invention is characterized in that the child seat further comprises locking means for keeping the first pivot point locked relative to the attachment during folding of the seat from the recumbent position to the seat position, and for releasing the locking prior to or as a result of folding of the seat from the seat position to the folded position. It will be apparent to those skilled in the art that the child seat according to the second aspect of the invention can have the same form as the seat of the apparatus for transporting a child described above.

Drawings

The invention will be discussed in detail below with reference to the attached drawing figures, wherein:

fig. 1 shows an overall perspective view of an embodiment of a device according to the invention;

FIG. 2 shows only the child seat of FIG. 1;

FIG. 3A shows a partially exploded view of the child seat, wherein FIG. 3B shows a schematic view of only the seat portion;

FIG. 4A shows a lateral view of the child seat in a seated position, and FIG. 4B shows a related schematic; and

fig. 5A shows a lateral view of the child seat in the folded position and fig. 5B shows the associated schematic.

Detailed Description

Fig. 1 shows an overall perspective view of an embodiment of the device according to the invention. The stroller 1 includes a lower frame 2 and an upper frame 3. The lower frame 2 comprises pairs of arms 4, the pairs of arms 4 being arranged parallel to each other and being connected to each other by two cross connections 5. Placed on the front side of the lower frame 2 are two rotating wheels 6, while two non-rotating rear wheels 7 are placed on the rear side of the lower frame 2.

The upper frame 3 includes a pair of down tubes 8, the pair of down tubes 8 being arranged parallel to each other and connected to an upper tube 9 by a hinge 10. The push rod 11 is telescopically received within the upper tube 9.

After being unlocked by an operating means (not shown), the push rod 11 can be moved downward. Then, by further operating means (not shown), the upper tube 9 can be unlocked with respect to the lower tube 8. After unlocking, the upper tube 9 with the push rod 11 received in the upper tube 9 can be pushed forward until the upper tube 9 gradually lies in substantially the same plane as the lower tube 8. After that, the upper frame 3 can be unlocked with respect to the lower frame 2, if necessary. After unlocking, the upper frame 3 can be moved downwards by means of the hinge 18 until the lower frame 2 and the upper frame 3 gradually lie substantially in the same plane.

The stroller 1 further comprises a seat 100, the seat 100 comprising a seat portion 12 and a backrest portion 14. The seat 12 comprises a bottom portion 121, the bottom portion 121 being preferably connected to the side wall 13 on either side in an integral manner, see fig. 2. As explained further below, the back portion 14 of the child seat 100 is pivotally connected to the seat portion 12. In addition to the seat portion 12 and the backrest portion 14, the child seat 100 also includes an attachment portion 15, and the child seat 100 and the down tube 8 are coupled by the attachment portion 15.

In the frame folding described above by rotating/pivoting the upper tube 9 toward the lower tube 8 and then rotating the upper frame 3 downward, the child seat 100 may not have a blocking effect. Thus, the child seat 100 can be folded prior to folding of the stroller 1, as explained below.

The stroller 1 further comprises a bumper bar 16 and a leg support 17. As explained below, the bumper bar 16 is pivotable relative to the attachment 15.

Fig. 2 shows only the child seat 100 in a perspective view. Here it can be seen that the side walls 13 of the seat 12 each comprise a pair of

side wall portions

130, 131, the pair of

side wall portions

130, 131 being placed at a mutual distance. Each side wall 13 further includes an end 133.

The backrest portion 14 is pivotable relative to the seat portion 12 about a first pivot point 132. The bumper bar 16 is pivotable about a second pivot point 161 relative to the attachment portion 15. The child seat 100 is also pivotally connected as a unit to the attachment portion 15 at pivot point 161. The leg support 17 can rotate by a hinge 171.

Fig. 3A shows a partially exploded view of the child seat 100. Fig. 3B shows a related schematic.

As can be seen in fig. 3A, a gear ring 136, which can co-act with a gear ring 142 in the backrest part 14, is accommodated in the space between the

side wall parts

130, 131. Also visible in the space between the

side wall parts

130, 131 is a bush 137, which bush 137 can co-act with a bush 141 in the backrest part 14. Thus, for example, it is possible for rivets or other types of pins to be placed through openings in the side walls 13 at the location of the first pivot point 132 for coupling to the

bushings

137, 141, so that the backrest portion 14 can pivot relative to the seat portion 12. The backrest portion 14 can be placed in the desired position and locked relative to the seat portion 12 by operating means (not shown) co-acting with the ring gears 136, 142. Such adjustment options are known in the art and therefore do not require further explanation.

The attachment portion 15 includes two

openings

151, 152 through which pins 1511, 1521 are inserted. Here, the pin inserted through the opening 152 is accessible on the upper side of the attachment portion 15.

Fig. 3A further shows that the second locking element 134 is accommodated in the space between the

side wall parts

130, 131. Figure 3B shows this element in more detail. The second locking member 134 includes a follower 1341 (formed here as a finger) and an engagement portion 1342 fixedly connected to the follower 1341. A second locking element 134 is pivotably received in the end 133 at the location of a pivot point 135.

As shown in fig. 3A and 3B, the end portion 133 extends in the lateral direction so that the end portion 133 can be supported on the attachment portion 15. As can be seen in fig. 3A, the second locking element 134 projects from the end 133 on the underside. More specifically, the engagement portion 1342 extends outside the space between the

side wall portions

130, 131. At least when the child seat 100 is in the seating position, the engagement portion 1342 will here engage the pin 1521, the pin 1521 being placed in the attachment 15 at the location of the opening 152. The pin 1521 can be referred to as a first locking element. Due to this locking between the first 1521 and second 134 locking elements, the child seat 100 cannot move upwards. This is because, as shown in fig. 3B, the engagement portion 1342 engages the first locking element 1521 from the lower side of the first locking element 1521. However, the child seat 100 is also unable to move downward because the end 133 rests on the attachment portion 15.

Follower 1341 extends between

side wall portions

130, 131 and bears against a stop edge 143 in back 14. This is shown in more detail in fig. 4A and 5A.

Fig. 3A further shows that the member 164 protrudes from the side wall 13. This component is received within recess 163 of bumper bar adapter 162. A bumper bar 16 can be releasably placed within the adapter.

End 133 includes a first portion 1331 and a second portion 1332 that can be coupled to each other. The portion 1331 here includes a bushing 1333. The first portion 1331, the second portion 1332, the side wall portion 130, and the side wall portion 131 are fixedly connected to each other. The seat 100 is pivotably coupled to the attachment portion 15 at the location of the second pivot point 161 by a pin 1334. The adapter 162 is further pivotable about the second pivot point 161. However, this movement is coupled to the movement of the backrest portion 14 by a linkage mechanism, as set forth below.

The bumper bar 16 is connected to a first arm 165, see fig. 3B. The relative position between the first arm 165 and the bumper 16 is constant here. At the end of the first arm 165, a second arm 167 is pivotally connected at a pivot point 166. At the other end, a second arm 167 is pivotally connected to the backrest portion 14 at pivot point 168.

Due to the coupling through the first and

second arms

165, 167, the cushion lever 16 will pivot due to the pivotal movement of the backrest portion 14 relative to the seat portion 12. By appropriate placement and dimensioning of the first and

second arms

165, 167 it is achieved that the bumper beam 16 moves backwards when the child seat 100 is placed in the recumbent position, and that the bumper beam 16 moves forwards when the child seat 100 is folded. More specifically, it can be achieved that the bumper bar 16 is at least partially received at a recess (not shown) of the leg support 17 when the seat 100 is fully folded. Therefore, it is not necessary to unlock the bumper bar 16 separately to enable it to pivot. The automatic adjustment of the position of the bumper bar 16 is more convenient for the user when the position of the seat 100 is changed.

Fig. 4A shows the child seat 100 in a lateral view, wherein the side wall portions 131 are not shown for clarity. In the sitting position as shown in perspective in fig. 4B, the follower 1341 is supported on a stop edge 143, the stop edge 143 being formed in the backrest portion 14 or fixedly coupled to the backrest portion 14. The stop edge 143 is here preferably placed concentrically around the first pivot point 132 and the bushing 141.

Fig. 4A shows that as the back 14 pivots forward, the follower 1341 comes into contact with the stop edge 143 at a position that is located further and further away from the first pivot point 132 and the bushing 141. The follower 1341 and the engagement element 1342 will thereby rotate, and at a given moment, the engagement element 1342 will no longer engage the pin 1521 placed through the opening 152. Thereby, the entire seat 100 can pivot about the second pivot point 161 with respect to the attachment portion 15. This is shown in fig. 5A and 5B. Fig. 5A particularly shows the follower 1341 engaging the stop edge 143 at a position located further away from the bushing 141 than the position shown in fig. 3A.

The engagement portion 1342 is placed under spring tension by a torsion spring, causing the engagement portion 1342 to rotate in the clockwise direction in fig. 4A.

As shown in fig. 4-5, the folding of a child seat according to one aspect of the invention can be divided into a first portion and a second portion. In the first part, i.e. during movement from the lying position to the sitting position, both the first pivot point and the second pivot point are locked relative to the attachment part. In the second part, e.g. from a position between the sitting and the fully folded position to the folded position, only the second pivot point is locked with respect to the attachment part. Thereby, the entire seat can be turned around the second pivot point, so that the seat can be moved further toward the front side of the stroller, and a more compact entirety of the folded stroller can be achieved.

The locking between the first locking element and the second locking element shown in the figures can also be released by operating an operating member (not shown). In such an embodiment, the stop edge as shown in fig. 4A can be omitted.

The present invention has been discussed in the foregoing in accordance with embodiments of the present invention. It will be apparent to those skilled in the art that the scope of protection of the application is not limited to these embodiments and that various changes may be made without departing from the scope of protection defined by the appended claims.

List of reference numerals:

1 baby carriage

2 lower car frame

3 get on the frame

4 parallel arm of lower frame

5 lower frame transverse connecting piece

6 rotating wheel

7 rear wheel

8 lower tube

9 upper tube

10 hinge

11 push rod

12 seat part

13 side wall of seat

14 back rest

15 attachment part

16-type safety rod

17 leg support

18 lower frame hinge

100 seat

121 seat bottom

130 inner side wall part

131 outer side wall part

132 first pivot point

133 end portion

134 second locking element

135 second locking element hinge

136 ring gear

137 bush

141 bush

142 ring gear

143 stop edge

151 open at the end

152 open at the end

161 second pivot point

162 buffer rod adapter

163 groove

164 projection

165 first arm

166 arm hinge

167 second arm

168 arm hinge

171 leg support hinge

1331 end portion

1332 end portion

1333 liner sleeve

1334 Pin

1341 follower

1342 Joint

1551 pin

1521 Pin

Claims

1. A device for transporting a child, such as a stroller or buggy, comprising:

a frame;

a seat provided with a seat part and a backrest part, wherein the seat part and the backrest part are pivotable relative to each other about a first pivot point for the purpose of folding and unfolding the seat;

an attachment portion for attaching the seat to the frame;

wherein the seat is pivotably connected to the attachment portion;

wherein the seat is foldable from a lying position, via a sitting position, to a folded position;

it is characterized in that the preparation method is characterized in that,

the device further comprises locking means for keeping the first pivot point locked with respect to the attachment during folding of the seat from the recumbent position to the seat position and for releasing the locking prior to or as a result of folding of the seat from the seat position to the folded position.

2. The device of claim 1, wherein upon release of the lock, pivoting of the backrest portion relative to the seat portion is mechanically decoupled from pivoting of the seat portion relative to the attachment portion.

3. The device of claim 1 or 2, wherein the seat is pivotably connected to the attachment portion at a second pivot point.

4. The device of claim 3, wherein the second pivot point has a constant position relative to the attachment portion during folding of the seat from the recumbent position to the folded position.

5. The device according to any one of the preceding claims, wherein the frame comprises a lower frame provided with wheels and an upper frame pivotably coupled thereto, wherein the attachment portion is releasably coupled to the upper frame, and wherein the frame is foldable by pivoting the upper and lower frames relative to each other.

6. The device of any one of the preceding claims, wherein the locking device is configured to release the locking as a result of folding of the seat from the sitting position to the folded position.

7. The device of claim 6, wherein the locking device is configured to maintain the first pivot point locked relative to the attachment during a first portion of the fold from the seat to the folded position and release the lock during a remaining portion of the fold.

8. The device according to claim 6 or 7, wherein the locking means comprises a first locking element coupled to the attachment and a second locking element coupled to the seat, wherein the first and second locking elements are lockable relative to each other for the purpose of said locking of the first pivot point relative to the attachment.

9. The device of claim 8, wherein the second locking element is pivotably coupled to the seat, and wherein the second locking element is configured to pivot as a result of folding of the seat to release the lock between the first locking element and the second locking element.

10. A device according to claim 9, comprising a resilient element, such as a torsion spring, for causing the second locking element to perform a pivoting movement under spring tension, wherein the spring tension is selected to cause the second locking element to rotate for the purpose of being able to lock with the first locking element.

11. The apparatus of claim 9 or 10, wherein the backrest portion comprises a support defining a path on which the second locking element is supported, wherein during folding of the seat from the seated to the folded position, a tip of the second locking element follows the path and causes the second locking element to rotate relative to the first locking element to break the lock between the first and second locking elements.

12. Device according to claim 11, wherein the support is formed as a stop edge arranged around the first pivot point, wherein the distance between the first pivot point and the point at which the second locking element obtains support against the stop edge evolves as a function of the angular position of the support point.

13. The device according to any one of claims 8-12, wherein the seat portion extends in a lateral direction over and rests on or contacts the attachment portion, at least when the seat is in a sitting, lying or intermediate position, thereby preventing downward movement of the seat relative to the attachment portion.

14. The device of claim 13 and 11 or 12, wherein the first locking element prevents upward movement of the seat relative to the attachment portion by engagement of the second locking element.

15. The apparatus of claim 14, wherein the second locking element comprises an engagement portion and a follower fixedly connected to the engagement portion, wherein a tip of the follower is supported on the path, and wherein the engagement portion is configured to engage with the first locking element.

16. The device of claim 15, wherein the engagement portion comprises a hook, and wherein the first locking element comprises a shaft or pin extending in a transverse direction.

17. The apparatus of claim 15 or 16, wherein the seat comprises:

a bottom;

side walls placed on either side of the bottom and connected thereto, wherein each side wall is connected at its upper side to the end;

wherein the end portion extends in the transverse direction to enable the end portion to be supported on the attachment portion at least in a sitting, lying or intermediate position of the seat, and wherein the second locking element is pivotably connected to the end portion.

18. The apparatus of claim 17, wherein each side wall is provided as a pair of side wall portions, the pair of side wall portions being arranged parallel to each other, wherein the follower extends from the end portion into a space between the pair of side wall portions, and wherein the engagement portion extends from the end portion towards the first locking element mounted in the attachment portion at least when the seat is in the sitting, recumbent or intermediate position.

19. A device according to any one of claims 1-10, comprising operating means for operating the locking device for the purpose of said release of the lock.

20. The device of claim 19, wherein operation of the operating member causes movement of the second locking element relative to the first locking element through the mechanical coupling, whereby the locking is released.

21. The device of any one of the preceding claims, wherein the attachment portion comprises coupling means for coupling the attachment portion to the frame.

22. The device of any one of the preceding claims, further comprising a bumper bar pivotably connected with the attachment portion at a third pivot point, the device further comprising a first arm connected to the bumper bar or having a constant position relative to the bumper bar, and a second arm pivotably connected at an end to the first arm and pivotably connected at a second end to the backrest portion at a distance from the first pivot point, wherein the first and second arms are positioned such that, during folding of the seat, the bumper bar rotates in the same direction as the backrest portion.

23. The device of claim 22 and any of claims 17-18, wherein the first and second arms extend in the space between the sidewall portions.

24. The device of claim 22 or 23, wherein the third pivot point and the second pivot point are the same.

25. The apparatus of any one of claims 22-24, further comprising a foot support, the foot support being pivotally mounted on the frame and having a recess therein for partially receiving the bumper beam.

26. A child seat adapted for use with a device for transporting a child as defined in any one of the preceding claims, comprising:

a seat portion and a backrest portion, wherein the seat portion and the backrest portion are pivotable relative to each other about a first pivot point for the purpose of folding and unfolding the seat;

an attachment portion for attaching the seat to a frame of the apparatus;

wherein the seat is pivotably connected to the attachment portion;

characterized in that the child seat further comprises locking means for keeping the first pivot point locked with respect to the attachment during folding of the seat from the recumbent position to the seat position and for releasing the locking before or as a result of folding of the seat from the seat position to the folded position.

27. A child seat according to claim 26, wherein the seat is embodied as defined in any one of claims 1-25.