CN114302842B

CN114302842B - Foldable child seat

Info

Publication number: CN114302842B
Application number: CN201880098746.7A
Authority: CN
Inventors: 刘自立; 乔舒亚·劳伦斯·贝克; 保罗·安德鲁·沃克; 瓦伦·安东尼·阿佩尔
Original assignee: Icandy World Ltd
Current assignee: Icandy World Ltd
Priority date: 2018-09-14
Filing date: 2018-09-14
Publication date: 2024-04-05
Anticipated expiration: 2038-09-14
Also published as: EP3849875A4; AU2018441134A1; WO2020051872A1; EP3849875A1; CN114302842A

Abstract

Foldable child seat (3) comprising an upper seat (12), a lower seat (13) and at least one mounting assembly (11) adapted to be mounted on a frame (2) of a child transportation device (1). The upper seat (12) and the lower seat (13) are movable between a folded position and an unfolded position of the seats by action of a manual operating element (15) and are movable in the unfolded position to at least two orientations with respect to each mounting assembly.

Description

Foldable child seat

Technical Field

The present invention relates to a collapsible child seat, and in particular to a collapsible child seat for a child stroller or pram or other child transportation device.

Background

Many known collapsible child seats are used for mounting on a child stroller, and the seat may be permanently or removably mounted. There is also a need to fold a stroller into a small volume of convenient size for easy storage in a home or vehicle. Such folding may also require folding of the child seat or, for a detachable child seat to be folded, simply facilitate easy storage. The child seat is formed of separate upper and lower seat elements that are attached to one or more adapters by which the seat may be mounted on a child stroller or other device. Such a child seat will be able to adapt to different positions between the recline and the upright of the child stroller. Child seats also typically have a restraint bar mounted across the seat for use as a partial restraint for the child. The bar may also be used as a carrying handle for the seat. Although such a bar may be removable, it is advantageous that it can be folded with the seat.

It is further advantageous that the positioning of the seat and the folding of the seat is easier and is preferably done using only one hand, while avoiding malfunction. Finally, the mechanisms that perform these functions should be compact and robust.

One known construction is shown in US2018/0027989, with a collapsible child seat having relatively movable seat and back elements and restraining bars, all of which are mounted on an adapter. The first locking mechanism locks the seat element to the adapter and the second locking mechanism locks the back element to the seat element. The user operates the trigger to release the second locking mechanism to allow the backrest element to rotate relative to the seat element to tilt the backrest or to move the backrest to an upright position. If the angle between the back element and the seat element is sufficiently reduced, the first locking mechanism is released to allow the seat element to rotate relative to the adapter and to allow the back element to fold onto the seat element. When the first locking mechanism is released, the third locking mechanism, which locks the restraining bar to the seat, is also released, allowing the bar to fold together with the backrest element. The restraining bar is mounted on a different shaft than the backrest and seat members, so that the structure of the locking mechanism is relatively complex.

Disclosure of Invention

According to a first aspect of the invention, a foldable child seat comprises an upper seat, a lower seat and at least one mounting assembly adapted to be mounted on a frame of a child transportation device, the upper and lower seats being movable by action of a manual operating element between a folded position and an unfolded position of the seat and being movable in the unfolded position relative to the or each mounting assembly to at least two orientations, the or each mounting assembly comprising an adapter element adapted to engage with the frame, an upper seat element to mount the upper seat, a lower seat element to mount the lower seat, a first lock to lock the upper seat element to the lower seat element in the unfolded position of the seat, and a second lock to lock one of the upper and lower seat elements to the adapter element in the at least two orientations, the seat in the unfolded position being further movable to an unlocked orientation, the second lock being released by action of the manual operating element and the first lock being released by engagement with the adapter element when the seat is in the unlocked orientation.

This configuration enables the seat to be adapted to different orientations and is particularly easy to use, since the positioning and folding can be accomplished with only one hand by operating the manual operating element which releases the two locking members. It is also simple to unfold the seat and automatically lock into the open position when the seat again reaches the unlocked orientation.

The or each mounting assembly component is preferably mounted on a common axis to provide a compact construction.

Conveniently, relative rotation of the upper and lower seat elements is restricted to define the open position of the seat. The restraining means may be provided by at least one axially extending pin, each pin being received in a pair of overlapping circumferential holes or grooves in the upper and lower seat elements. Preferably, two pins are provided, each pin being received in a respective pair of overlapping circumferential holes or grooves. This arrangement allows the upper and lower seat elements to be rotated up to 180 ° relative to each other so that the upper and lower seats can be moved between the open and folded positions of the seats.

The aperture or recess has a minimal overlapping portion when the seat is in the open position, the pin being trapped between the ends of the aperture or recess. When the upper seat element is unlocked from and folded toward the lower seat element, the upper seat element pushes the pin from one end of the groove or hole to the other end to a position where the grooves or holes completely overlap. When the seat is unfolded, the upper seat element will push the pin in the opposite direction and the overlap is reduced until the pin is trapped between the ends of the hole or recess with minimal overlap.

One or more pins may be mounted on the cover member, which may also rotate about a common axis. The cover member may also have a restraining bar mounted thereon. The folding seat automatically folds the restraining bar between the upper seat element and the lower seat element and automatically deploys the seat to the open position to bring the restraining bar to its securely locked operative position. This arrangement has a simple construction and is very easy to handle.

Conveniently, the first lock has teeth that engage the upper and lower seat elements and is axially movable into and out of the locked and released positions. The first lock may be annular with external teeth engaged with internal teeth in the upper and lower seat elements. The first locking member has at least one inner cam surface for engagement with a corresponding outer cam surface on the axial projection of the adapter element. Movement of the open seat toward the unlocked orientation causes the first lock to rotate relative to the adapter element and the cam surface engages to move the first lock axially out of engagement with the upper seat element. A spring is provided which urges the first locking member into engagement with the upper seat element when the seat is deployed to the open position.

The second lock may have teeth that engage the upper seat element and the adapter element, and may be axially movable into and out of the locked and released positions. The second locking member is preferably annular, having external teeth which engage with internal teeth in the upper seat element and the adapter element.

A cable cam element is received between the upper seat element and the second lock. The cable cam element has an inner cam surface for engagement with a corresponding outer cam surface on the upper seat element. The cable cam element is rotated by a manual operating element, thereby axially moving the second lock out of engagement with the upper seat element. A spring is provided to urge the second locking member back into engagement with the upper seat element upon release of the manual operating element. The manual operating element conveniently comprises a button for pulling the cable attached to the cable cam element in order to rotate the cable.

According to a second aspect of the present invention, a collapsible child seat comprises an upper seat, a lower seat, a restraining bar and at least one mounting assembly adapted to be mounted on a frame of a child transportation device, the upper and lower seats being movable between a folded position and an unfolded position of the seat by action of a manual operating element, the or each mounting assembly comprising an adapter element adapted to engage with the frame, an upper seat element to mount the upper seat, a lower seat element to mount the lower seat, and a restraining bar element to mount the restraining bar, the restraining bar element having at least one pin received in a relatively rotatable overlapping circumferentially extending aperture or recess in the upper and lower seat elements, the arrangement being such that when the seat is in the unfolded position, the pin is held between the ends of the aperture or recess and when the seat is moved between the unfolded and folded positions, the pin moves in the aperture or recess.

This provides a simple structure that allows the restraining bar to automatically fold with the seat and automatically move to the open position by the pin moving in the overlapping holes or grooves when the seat is unfolded. The restraining bar is held securely in the open position by the upper seat member and the lower seat member.

The restraining bar element conveniently has a pair of pins, each pin operating in a respective pair of overlapping holes or recesses in the upper and lower seat elements.

The upper and lower seat elements are preferably locked by a lock when the seat is in the open position. When the lock is released, the upper seat element can rotate towards the lower seat element. As the overlap between the holes or grooves increases, the ends of the holes or grooves in the upper seat element will push the corresponding pins. As the seat deploys, the upper seat element will push the pin in the opposite direction as the overlap decreases until a position of minimal overlap is reached.

Each of the upper and lower seat elements may have a hole to receive a pin; or one of the upper and lower seat elements may have a hole and the other a corresponding recess.

The restraining bar element may be used as a cover element for the mounting assembly. Conveniently, the restraining bar element is rotatable relative to the adapter element.

Drawings

Embodiments of a collapsible child seat according to all aspects of the present invention are illustrated by way of example only in the accompanying drawings, in which:

FIG. 1 is a perspective view of a stroller including a collapsible child seat according to the present invention;

FIG. 2 is a perspective view of the seat without the fabric cover;

FIG. 3 is an exploded view of the seat shown in FIG. 2;

FIG. 4 is a side view of an adapter element of the mounting assembly of the seat shown in FIG. 1;

FIG. 5 is a perspective view of the adapter element shown in FIG. 4;

FIG. 6 is a side view of the upper seat element of the mounting assembly;

FIG. 7 is a perspective view of the upper seat element;

FIG. 8 is a cross-sectional view of the upper seat element taken along line 8-8 shown in FIG. 6;

FIG. 9 is a side view of the lower seat element of the mounting assembly;

FIG. 10 is a view of the opposite side of the lower seat element;

FIG. 11 is a perspective view of the lower seat element;

FIG. 12 is a side view of the first locking member of the mounting assembly;

FIG. 13 is a view of the opposite side of the first locking member;

FIG. 14 is a perspective view of the first locking member;

FIG. 15 is a side view of the second locking member of the mounting assembly;

FIG. 16 is an opposite side view of the second locking member;

FIG. 17 is a perspective view of the second locking member;

FIG. 18 is a side view of the cable cam element;

FIG. 19 is a view of the opposite side of the cable cam element; and

fig. 20 is a perspective view of the cable cam element.

Detailed Description

Fig. 1 shows a child stroller 1 having a wheel-carrying collapsible frame 2 capable of carrying a detachable seat 3. The stroller 1 can be folded by activating the push button 4 on the handle 5. The seat 3 is provided with a canopy 6, which also can be folded or detached, and the seat 3 is provided with restraining bars 7. The seat 3 is foldable so that it can be folded together with the frame 2, the seat 3 being detachably mounted on a mounting bracket 8 of the frame 2 so that the seat 3 can be used to carry a child or mounted on another child transport device.

Figures 2 and 3 show the seat 3 in more detail. The seat 3 includes a tubular seat frame 10 attached to a pair of mounting assemblies 11, one mounting assembly 11 on each side of the tubular seat frame 10, and having a common axis. Each mounting assembly 11 may be removably mounted on a corresponding mounting bracket 8 on the frame 2. The restraining bar 7 is also attached to the mounting assembly 11. The tubular seat frame 10 has an upper seat 12 and a lower seat 13, respectively, covered by fabric 9 (shown only in fig. 1. The canopy 6 is mounted on the upper seat 12 by a frame member 14. The upper seat 12 and the lower seat 13 are relatively rotatable about an axis of the mounting assembly 11 between an open position (as shown) and a collapsed position of the seat 3. The upper seat 12 is in contact with the lower seat 13 with restraining bars 7 between the upper seat 12 and the lower seat 13. In the open position, the seat 3 is locked and is capable of assuming different orientations on the stroller frame 2. An upright orientation is shown in fig. 1 and the seat 3 is substantially parallel to the surface on which the stroller 1 is placed in an inclined orientation with an intermediate orientation between the seat 3 and the plane in which the stroller 1 is located. An unlocking orientation is also provided. A manually operated button 15 on the upper seat 12 is activated to enable movement of the seat 3 between the different orientations and movement between the open and collapsed positions. The mounting assembly 11 is configured to control movement of the seat 3 and lock the seat 3 in the different orientations and positions.

The mounting assemblies 11 are mirrored and therefore only one will be described. As best shown in fig. 3, the mounting assembly 11 includes an adapter 20 adapted to be mounted on the bracket 8, an upper seat element 21 attached to the upper seat 12, a lower seat element 22 attached to the lower seat 13, a first lock 23 adapted to lock the upper seat element 21 and the lower seat element 22, a second lock 24 adapted to lock the upper seat element to the adapter 20, a cable cam element 25 operated by a cable 26 attached to the push button 15, a cover element 27 attached to the restraining bar 7, and a spindle 28 defining the axis of the assembly 11, and the components are mounted on this spindle 28 for rotation.

The adapter 20 (best shown in fig. 3 to 5) comprises an adapter element 30, as well as an inner cap 31, a release element 32 and an outer cap 33. The adapter element 30 has a lower end 34 of generally rectangular outline, the lower end 34 being adapted to fit into the bracket 8, held by a manually operable catch (not shown), the adapter element 30 having an upper end 35 of circular outline. A substantially cylindrical hollow projection 36 extends axially inwardly from the center of the upper end 35. A blind hole 37 in the projection 36 is adapted to receive the spindle 28, the free end 38 of the projection 36 being dumbbell-shaped. The outer surface of the projection 36 is formed with a pair of diametrically opposed cams 39, each cam surface 40 being adapted to engage a cam on the first locking member 23, as described below. The inner peripheral surface of the upper end 35 is formed with axially extending teeth 41, the teeth 41 being adapted to engage corresponding teeth on the second locking member 24, as described below. The inner cap 31 is attached to the adapter element 30 by means of screws (not shown).

As best shown in fig. 6-8, the upper seat element 21 has a generally annular profile, including a generally cylindrical portion 42 having a stepped profile, with a hollow cylindrical arm 43 extending from the cylindrical portion 42 to receive the tubular seat frame 10 of the upper seat 12. The portion 42 comprises a first portion 44 of larger diameter and a second portion 45 of smaller diameter separated by an annular web 46. The outwardly facing first portion 44 is cylindrical and has internal teeth 47 formed around its periphery, the internal teeth 47 for engagement with teeth on the second locking member 24, as described below. Three cams 48 extend from the inner periphery of the annular web 46 within the first portion 44, the diameter of the inner periphery being selected to allow the free passage of the tab 36. The cam surface 49 of each cam 48 is adapted to engage with a corresponding cam surface on the cable cam element 25. The inwardly facing second portion 45 has internal teeth 50 formed around its periphery, the internal teeth 50 for engagement with teeth on the first locking member 23. The outer periphery is formed with two oppositely disposed circumferential grooves 51 forming part of a mechanism 52 that limits the relative rotation of the upper 21 and lower 22 seat elements.

Fig. 9-11 illustrate the lower seat element 22, which also has a generally annular profile, including a generally cylindrical portion 53, with a hollow cylindrical arm 54 extending from the portion 53 to receive the tubular seat frame 10 of the lower seat 13. The central bore 55 has a dumbbell shape to receive the free end 38 of the projection 36 on the adapter element 30, with internal teeth 56 formed on the intermediate diameter for engagement with teeth on the first locking member 23. A pair of oppositely disposed circumferential holes 57 are formed in the outer periphery. These are part of the mechanism 52 that limits the relative rotation of the upper seat element 21 and the lower seat element 22. This arrangement allows each recess 51 on the upper seat element 21 to be moved from a position of minimal overlap with a corresponding aperture 57 defined by a pin 77 (shown in phantom in figures 6 and 9) received in the recess and aperture to a position in which the recess 51 and aperture 57 are aligned. Because the pin can also move relative to the recess 51 and the aperture 57, the relative rotation of the upper and lower seat elements 21, 22 is approximately 180 °, which enables the seat to move between the open and folded positions.

The first locking member 23 is shown in fig. 12 to 14, and is a gear-type component having a substantially annular profile. The first lock 23 has external teeth 60 corresponding to the internal teeth 56 on the lower seat element 22 and the internal teeth 50 on the upper seat element 21. The two diametrically opposed external teeth 60 have a greater circumferential extent to ensure that the first lock 23 has only two orientations relative to the upper and lower seat elements 21, 22. The central aperture 62 of the first locking member 23 is dumbbell-shaped to receive the free end 38 of the tab 36 on the adapter 30. The bore 62 also has two diametrically opposed inner cam surfaces 63, the inner cam surfaces 63 being adapted to engage corresponding outer cam surfaces 40 on the cam 39 on the tab 36. The relative rotation of the projection 36 and the first locking member 23 causes the first locking member 23 to move axially. The first locking member 23 is always accommodated in the lower seat element 22 and moves axially into and out of engagement with the upper seat element 22. A spring (not shown) pushes the first locking member 23 towards the adapter element 30. When the first lock 23 is engaged with the upper seat element 22, the upper seat element 21 and the lower seat element 22 lock together to prevent relative movement in the open position of the seat 3.

A second locking member 24 is shown in fig. 15 to 17, which likewise has a gear-type component of substantially annular contour. The second lock 24 has external teeth 65 corresponding to the internal teeth 47 on the upper seat element 21 and the internal teeth 41 on the adapter element 30. It should be noted that external tooth 65 has two diametrically opposed different forms of teeth 66, 67. Teeth 66 have a greater radial extent than teeth 65, while teeth 67 have a greater circumferential extent. This means that the second locking member 24 has only a single orientation with respect to the upper seat element 21 and the adapter element 30. The central aperture 68 of the second locking member 24 is circular and the central aperture 68 is sized to allow the tab 36 of the adapter member 30 to pass freely therethrough. The second lock 24 is always accommodated in the adapter element 30 and moves axially into and out of engagement with the upper seat element 21. When the second lock 24 is engaged with the upper seat element 21, the second lock 24 locks the upper seat element with the adapter element 30 to hold the seat 3 in a given orientation. Movement of the second locking member 24 is controlled by the cable cam element 25, the cable cam element 25 engaging an inner axial face 69 of the second locking member 24, as explained below. A spring (not shown) urges the second locking member 24 toward the upper seat member 21.

Fig. 18 to 20 show a cable cam element 25 having a stepped annular profile with outwardly extending radial projections 70, the projections 70 having grooves 71 for guiding and anchoring the ends of the cables 26. The central hole 72 is formed with three cam profiles 73 which are evenly distributed around the diameter and which correspond to the cams 48 on the upper seat element 21. The cable cam element 25 is received in the upper seat 21, the cam 48 is received in the cam profile 73, and the cam surface 49 is engaged with a corresponding cam surface 74 of the cam profile 73. The outer axial surface 75 of the cable cam member 25 engages the inner axial surface 69 of the second lock 24, the push button 15 is connected to the cable 26, and when the push button 15 is actuated, the cable 26 rotates the cable cam member 25, and the engagement of the cam surfaces 49, 74 moves the cable cam member 25 axially away from the upper seat member 21. This movement disengages the second lock 24 from the upper seat element 21 to allow relative rotation of the upper seat element 21 and the adapter 30.

The cover element 27 is fitted with a restraining bar 7 and a pin 77 that completes the restraint of the mechanism 52. Two diametrically opposed pins 77 are attached to the cover element 27 and extend axially, one pin 77 passing through each circumferential hole 57 in the lower seat element 22 and into a corresponding recess 51 in the upper seat element 21. Each pin 77 is locked in a position of minimal overlap of the corresponding hole 57 and recess 51. As the overlap increases, each pin 77 is free to move and eventually engages the end of the corresponding recess 51 and is carried toward the other end of the corresponding hole 57 when the corresponding recess 51 and hole 57 are aligned. In the opposite operation, each pin 77 is carried by its groove 51 to the other end of the hole 57 and locks at a position of minimal overlap between the respective groove and the end of the hole.

In the position shown in fig. 1, the seat 3 is in an upright position. The first locking member 23 engages the upper seat element 21 and the lower seat element 22 to lock the upper seat 12 and the lower seat 13 together in the open position. Cam surfaces 40 (on adapter element 30) and 63 (on first lock 23) are partially engaged. The grooves 51 and holes 57 on the upper and lower seat members 21, 22 are in a position of minimal overlap and the pins 77 are locked between the upper and lower seat members. This ensures that the restraining bar 7 is locked in the open position shown. By engagement of the second locking member 22 with the upper seat element 21 in the adapter element 30, the seat 3 as a whole is locked in the upright orientation. The cable cam member 25 is received in the upper seat member 21 but the cam surfaces 49 and 74 are disengaged. The axial face of the cable cam element 25 engages the second locking member 24.

To change the orientation of the seat 3, the push button 15 is pushed to pull the cable 26 and rotate the cable cam element 25. This causes the cam surfaces 49 and 74 to engage and the cable cam element 25 to move axially towards the second lock 24, which urges the second lock 24 axially out of engagement with the upper seat element 21 against the force in the spring, allowing the upper seat element 21 to rotate relative to the adapter element 30. The seat 3 is still in the open position because the first locking member 23 is not affected by this movement and continues to lock the upper 21 and lower 22 seat elements together. The seat 3 may adopt three orientations, namely an upright orientation as shown, and a neutral orientation and a reclined orientation by rotating the seat 3 counterclockwise as shown in fig. 1. In the tilted orientation, cam surfaces 40 and 63 disengage. When the seat 3 is rotated to the upright orientation, the cam surfaces 40 and 63 begin to engage and move the first lock 23 axially away from the upper seat element 21 against the force in the spring. In the upright orientation, the first lock 23 remains engaged with the upper seat element 21 and the lower seat element 22.

However, if the seat 3 is moved beyond the upright orientation (i.e., clockwise in fig. 1), engagement of the cam surfaces 40 and 63 causes the first lock 23 to move axially out of engagement with the upper seat element 21. The first locking member 23 is then fully received in the lower seat element 22 unlocking the upper seat 12 and the lower seat 13 so that the upper seat 12 can be rotated into a folded position relative to the lower seat 13. As the upper seat member 21 rotates relative to the lower seat member 22, the grooves 51 and holes 57 begin to overlap more, releasing the pins 77 and also rotating the cover member 27. The upper seat member 21 is moved further into engagement with the pin 77 pushing the pin 77 to the end of the aperture 57. Thus, the cover member 27 rotates, and the restraint lever 7 automatically moves to the folded position between the upper seat 12 and the lower seat 13. It will be appreciated that this arrangement enables the upper seat to be rotated approximately 180 ° to be adjacent the lower seat 13 in the folded position. In this position, the first locking member 23 remains disengaged from the upper seat element 21, but upon release of the push button 15 the second locking member 24 moves axially to lock the upper seat element 21 to the adapter element 30. Once the seat 3 is folded, the frame 2 of the stroller can also be folded. The seat 3 may be removed for use elsewhere. To deploy the seat 3, the button 15 is pressed again to release the second locking member 24. This enables the upper seat element 21 to rotate relative to the adapter element 30 and the lower seat element 22, since the first lock 23 is not engaged with the upper seat element 21. Rotation of the upper seat member 21 relative to the lower seat member 22 also moves the cover 27 through engagement of the end of the recess 51 with the pin 77 and thus automatically pulls the restraining bar 7 to the open position. When the upper seat element 21 reaches the open position, the cam surfaces 40 and 63 allow the spring to urge the first locking member 23 into engagement with the upper seat element 21 again, locking the upper and lower seat elements together, securing the seat 3 in the open position, securing the restraining bar 7 by means of the pin 77 between the end of the recess 51 and the aperture 57.

The above arrangement provides a compact and robust construction, which is very easy to handle with one hand, while providing a compact folded position and a safe unfolded position for the seat 3.

Claims

1. A collapsible child seat (3) comprising an upper seat (12), a lower seat (13) and at least one mounting assembly (11) adapted to be mounted on a frame (2) of a child transportation device (1), the upper and lower seats being movable between a folded position and an unfolded position of the upper and lower seats by action of a manual operating element (15) and being movable in the unfolded position relative to the or each mounting assembly to at least two orientations, the or each mounting assembly (11) comprising an adaptor element (20) adapted to engage with the frame (2), an upper seat element (21) mounting the upper seat (12), a lower seat element (22) mounting the lower seat (13), a first locking member (23) locking the upper seat element to the lower seat element in the unfolded position of the upper and lower seats, and a second locking member (24) locking one of the upper and lower seat elements to the adaptor element in the unfolded position, the second seat element (24) being further capable of being released by said manual operating element (24) and unlocking the seat when the second seat (24) is moved in the unfolded position and the manual operating element, the first locking member (23) is released by engagement with the adapter element (20).

2. A collapsible child seat according to claim 1, wherein the components of the or each mounting assembly (11) are mounted on a common axis.

3. A foldable child seat according to claim 1, wherein relative rotation of the upper seat element (21) and the lower seat element (22) is restricted to define the open position of the upper seat and the lower seat.

4. A foldable child seat according to claim 2, wherein relative rotation of the upper seat element (21) and the lower seat element (22) is restricted to define the open position of the upper seat and the lower seat.

5. A foldable child seat according to claim 4, wherein the restraining means is provided by at least one axially extending pin (77), each pin (77) being received in a pair of overlapping circumferential holes or grooves (51, 57) in the upper and lower seat elements.

6. A foldable child seat according to claim 5, wherein two pins (77) are provided, each pin (77) being received in a respective pair of overlapping circumferential holes or grooves.

7. A foldable child seat according to claim 5, wherein the one or more pins are mounted on a cover element (27) which rotates about the common axis.

8. A foldable child seat according to claim 7, wherein the cover element (27) is mounted on a restraining bar (7).

9. A foldable child seat according to claim 1, wherein the first locking member (23) has teeth engaging the upper and lower seat elements and is axially movable into and out of a locking position and a release position.

10. A foldable child seat according to claim 9, wherein the first locking member (23) is annular with external teeth (60) engaging internal teeth (50, 56) in the upper and lower seat elements.

11. A foldable child seat according to claim 1, wherein the first locking member (23) has at least one inner cam surface (63), the inner cam surface (63) being adapted to engage with a corresponding outer cam surface (40) on the axial projection (36) of the adapter element.

12. A foldable child seat according to claim 1, wherein a spring is provided which urges the first locking member (23) into engagement with the upper seat element (21) when the upper and lower seats are unfolded to the open position.

13. A foldable child seat according to claim 1, wherein the second locking member (24) has teeth engaging the upper seat element (21) and the adapter element (20), and is axially movable into and out of a locking position and a release position.

14. A foldable child seat according to claim 13, wherein the second locking member (24) is annular with external teeth (65) engaging internal teeth (47, 41) in the upper seat element (21) and the adapter element (20).

15. A foldable child seat according to claim 1, wherein a cable cam element (25) is accommodated between the upper seat element (21) and the second locking member (24), the cable cam element (25) having an inner cam surface (74), the inner cam surface (74) being adapted to engage with a corresponding outer cam surface (48) on the upper seat element (21) and the cable cam element (25) being rotated by a manual operating element (15) such that the second locking member (24) is moved axially out of engagement with the upper seat element (21).

16. A foldable child seat according to claim 15, wherein a spring is provided to urge the second locking member (24) back into engagement with the upper seat element (21) upon release of the manual operating element (15).

17. A foldable child seat according to claim 15 or 16, wherein the manual operating element (15) comprises a button for pulling a cable (26) attached to a cable cam element for rotating the cable cam element.