CN114302842A

CN114302842A - Foldable child seat

Info

Publication number: CN114302842A
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: 2022-04-08
Anticipated expiration: 2038-09-14
Also published as: EP3849875A4; AU2018441134A1; WO2020051872A1; CN114302842B; EP3849875A1

Abstract

A 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 (12) and lower (13) seats are movable between a folded position and an open position of the seats by action of a manually operable element (15) and are movable in the open position to at least two orientations relative to each mounting assembly.

Description

Foldable child seat

Technical Field

The present invention relates to a foldable child seat, and in particular to a foldable child seat for use in a stroller or buggy or other child conveyance device.

Background

Many known foldable child seats are intended to be mounted on a stroller, the seat being permanently or removably mounted. There is also a need to fold the stroller into a convenient size, small volume for easy storage in the home or in a vehicle. Such folding may also require folding of the child seat, or for a detachable child seat to be folded, simply to facilitate storage. The child seat is then 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 stroller or other device. Such a child seat will be able to adapt to different positions between the tilt and the upright of the pushchair. Child seats also typically have a restraint bar mounted across the seat for use as a local restraint for the child. The bar may also be used as a carrying handle for the chair. Although such a bar may be removable, it is advantageously foldable with the seat.

It is further advantageous that the actions of positioning the seat and folding the seat are easier and preferably done using only one hand, while avoiding malfunctions. Finally, the mechanism that performs these functions should be compact and robust.

A known construction is shown in US2018/0027989, having a foldable child seat with relatively movable seat and backrest elements and a restraining bar, all mounted on an adapter. A first locking mechanism locks the seat element to the adapter and a 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 back member to rotate relative to the seat member to recline the back or move the back to the 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 the back element to fold onto the seat element. When the first locking mechanism is released, the third locking mechanism that locks the restraining bar to the seat is also released, allowing the bar to fold with the backrest element. The restraining bar is mounted on a different axle than the backrest and the seat element, and the structure of the locking mechanism is therefore 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 transporter, the upper and lower seats being movable between a folded position and an open position of the seat by action of a manually operable element and being movable in the open position to at least two orientations relative to the or each mounting assembly, the or each mounting assembly comprising an adaptor element adapted to engage with the frame, an upper seat element to which the upper seat is mounted, a lower seat element to which the lower seat is mounted, a first lock to lock the upper seat element to the lower seat element in the open position of the seat and a second lock to lock one of the upper and lower seat elements to the adaptor element in said at least two orientations, the seat in the open position being further movable to an unlocked orientation, the second lock is released by action of the manually operated element and the first lock is 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 positioning and folding can be done with only one hand by operating the manually operated element, which releases the two locks. It is also simple to deploy the seat, automatically locking into the open position when the seat again reaches the unlocked orientation.

The or each mounting assembly components are preferably mounted on a common axis to provide a compact configuration.

Conveniently, the relative rotation of the upper and lower seat elements is limited to define the open position of the seat. The limiting 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 relative to each other up to 180 deg., so that the upper and lower seats can be moved between the open and folded positions of the seats.

When the seat is in the open position, the holes or grooves have a minimal overlap and the pins are trapped between the ends of the holes or grooves. When the upper seat element is unlocked from the lower seat element and folded towards 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 overlapping part decreases until the pin is trapped between the ends of the hole or groove with a minimum of overlap.

One or more pins may be mounted on the cover element, which may also rotate about a common axis. A restraining bar may also be mounted on the cover element. Folding the seat automatically folds the restraint bar between the upper and lower seat elements and automatically deploys the seat into an open position to bring the restraint bar into its securely locked operative position. This arrangement has a simple construction and is very easy to operate.

Conveniently, the first locking member has teeth which engage with the upper and lower seat elements and is axially movable into and out of the locking and release positions. The first locking member may be annular, having external teeth that engage with internal teeth in the upper and lower seat elements. The first locking member has at least one inner cam surface for engaging 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 member and the cam surfaces to engage to move the first lock axially out of engagement with the upper seat member. A spring is provided that urges the first locking member into engagement with the upper seat element when the seat is deployed to the open position.

The second locking member may have teeth that engage the upper seat element and the adapter element and is axially movable into and out of a locking and releasing position. The second locking member is preferably annular, having external teeth engaging 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 member has an inner cam surface for engaging a corresponding outer cam surface on the upper seat member. The cable cam member is rotated by the manually operable member to axially move the second locking member out of engagement with the upper seat member. A spring is provided to urge the second locking member back into engagement with the upper seat element upon release of the manually operable element. The manually operable element conveniently comprises a button for pulling a cable attached to the cable cam element in order to rotate the cable.

According to a second aspect of the invention, a foldable 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 transporter, the upper and lower seats being movable between a folded position and an unfolded position of the seat by action of a manually operable element, the or each mounting assembly comprising an adapter element adapted to engage the frame, an upper seat element to which the upper seat is mounted, a lower seat element to which the lower seat is mounted, and a restraining bar element to which the restraining bar is mounted, the restraining bar element having at least one pin received in relatively rotatable overlapping circumferentially extending holes or recesses in the upper and lower seat elements, the arrangement being such that when the seat is in the unfolded position, there is minimal overlap between the holes or recesses of the upper and lower seat elements, the pin being retained between the ends of the holes or recesses, and the pin moves in the hole or groove when moving between the open and folded positions of the seat.

This provides a simple structure allowing the restraining bar to fold automatically with the seat and the restraining bar is automatically moved to the open position by the pin moving in the overlapping hole or groove when the seat is open. The restraining bar is securely held in the open position by the upper and lower seat elements.

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. When the portion of 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 portion of overlap decreases, the upper seat element will push the pin in the opposite direction as the seat unfolds until a position of minimum overlap is reached.

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

The constraining bar element may serve as a cover element for the mounting assembly. Conveniently, the constraining bar element is rotatable relative to the adapter element.

Drawings

Embodiments of a foldable child seat in accordance with 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 foldable child seat according to the present invention;

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

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 a 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 member;

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

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

Detailed Description

Fig. 1 shows a children's stroller 1 having a foldable frame 2 with wheels, which can carry a detachable seat 3. The stroller 1 can be folded by activating the button 4 on the handle 5. The seat 3 is provided with a canopy 6, which can also be folded or detached, and the seat 3 is further provided with a restraining bar 7. The seat 3 is foldable so that it can be folded together with the frame 2, and the seat 3 is detachably mounted on the mounting bracket 8 of the frame 2 so that the seat 3 can be used to carry a child or mounted on another child conveyance device.

Figures 2 and 3 show the seat 3 in more detail. The seat 3 comprises 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 to a respective 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, which are covered by a fabric 9 (only shown in figure 1. a canopy 6 is mounted on the upper seat 12 by a frame member 14. the upper and

lower seats

12, 13 are relatively rotatable about the axis of the mounting assembly 11 between an open position (as shown) and a collapsed position of the seat 3, the upper seat 12 being in contact with the lower seat 13, with a restraint bar 7 between the upper and

lower seats

12, 13. in the open position, the seat 3 is locked and can adopt different orientations on the stroller frame 2. in figure 1, an upright orientation is shown, and in a reclined orientation, the seat 3 is substantially parallel to the surface on which the stroller 1 is placed, with an intermediate orientation between the seat 3 and the plane in which the stroller 1 is located. an unlocked orientation is also provided. a manually operable button 15 on the upper seat 12 is activated to enable the seat 3 to be moved between the different orientations, and between open and folded positions. The mounting assembly 11 is configured to control movement of the seat 3 and lock the seat 3 in different orientations and positions.

The mounting assemblies 11 are mirror images and therefore only one will be described. As best shown in fig. 3, mounting assembly 11 comprises an adapter 20 adapted to be mounted on bracket 8, an upper seat element 21 attached to upper seat 12, a lower seat element 22 attached to lower seat 13, a first lock 23 adapted to lock upper seat element 21 and lower seat element 22, a second lock 24 adapted to lock the upper seat element to adapter 20, a cable cam element 25 operated by a cable 26 attached to push button 15, a cover element 27 attached to restraint lever 7, and a spindle 28 defining the axis of assembly 11, and on which spindle 28 the components are mounted 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 profile, the lower end 34 being adapted to fit into the carrier 8, being retained by a manually operable catch (not shown), the adapter element 30 having an upper end 35 of circular profile. A substantially cylindrical hollow projection 36 extends axially inwardly from the center of the upper end 35. A blind bore 37 in the projection 36 is adapted to receive the spindle 28, and a free end 38 of the projection 36 is dumbbell-shaped. The outer surface of the tab 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 cover 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 generally has an annular profile including a substantially cylindrical portion 42 having a stepped profile from which cylindrical portion 42 extends a hollow cylindrical arm 43 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 first outwardly facing portion 44 is cylindrical and has internal teeth 47 formed around its periphery, the internal teeth 47 being 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 projection 36. The cam surface 49 of each cam 48 is adapted to engage a corresponding cam surface on the cable cam member 25. The second, inwardly facing portion 45 has internal teeth 50 formed around its periphery, the internal teeth 50 being 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 which limits the relative rotation of the upper and

lower seat members

21, 22.

Fig. 9 to 11 show the lower seat element 22, which likewise has a substantially annular profile, comprising a substantially cylindrical portion 53, from which portion 53 a hollow cylindrical arm 54 extends to receive the tubular seat frame 10 of the lower seat 13. The central bore 55 has a dumbbell shape to receive the free ends 38 of the tabs 36 on the adapter member 30, with internal teeth 56 formed on an intermediate diameter for engagement with the teeth on the first lock 23. A pair of oppositely disposed circumferential holes 57 are formed in the outer periphery. These are part of a mechanism 52 that limits the relative rotation of the upper and

lower seat members

21, 22. This arrangement allows each recess 51 on the upper seat element 21 to be moved from a position of minimum overlap with a corresponding hole 57 defined by a pin 77 (shown in phantom in figures 6 and 9) received in the recess and hole to a position in which the recess 51 and hole 57 are aligned. Because the pin is also movable relative to the recess 51 and the hole 57, the relative rotation of the upper and

lower seat elements

21, 22 is close to 180 °, which enables the seat to be moved between the open and folded positions.

The first locking member 23 is shown in fig. 12 to 14 and is generally a gear-type member of annular profile. First locking member 23 has external teeth 60 corresponding to internal teeth 56 on lower seat member 22 and internal teeth 50 on upper seat member 21. The two diametrically opposed external teeth 60 have a greater circumferential extent to ensure that the first locking member 23 has only two orientations with respect to the upper and

lower seat elements

21, 22. The central bore 62 of the first locking member 23 is dumbbell-shaped to receive the free end 38 of the projection 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 with corresponding outer cam surfaces 40 on the cams 39 on the nose 36. Relative rotation of the projection 36 and the first locking member 23 causes the first locking member 23 to move axially. First locking member 23 is always received in lower seat element 22 and moves axially into and out of engagement with upper seat element 22. A spring (not shown) urges the first locking member 23 towards the adaptor element 30. When first lock 23 engages upper seat member 22, upper seat member 21 and lower seat member 22 lock together to prevent relative movement in the open position of seat 3.

The second locking member 24, which is also of a gear type component of generally annular profile, is shown in figures 15 to 17. The second locking member 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 the outer teeth 65 have two diametrically opposed different forms of

teeth

66, 67. Tooth 66 has a greater radial extent than tooth 65, while tooth 67 has 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 protrusion 36 of the adaptor element 30 to pass freely therethrough. The second locking member 24 is always housed in the adapter element 30 and moves axially to engage and disengage 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. The movement of the second locking member 24 is controlled by the cable cam member 25, the cable cam member 25 engaging an inner axial face 69 of the second locking member 24, as explained below. A spring (not shown) pushes the second locking member 24 towards the upper seat element 21.

Fig. 18 to 20 show a cable cam element 25 having a stepped annular profile with an outwardly extending radial projection 70, the projection 70 having a groove 71 for guiding and anchoring an end of a cable 26. The central hole 72 is formed with three cam profiles 73 evenly distributed around the diameter and corresponding to the cams 48 on the upper seat element 21. The cable cam member 25 is received in the upper seat member 21, the cam 48 is received in the cam profile 73, and the cam surfaces 49 engage with corresponding cam surfaces 74 of the cam profile 73. Outer axial face 75 of cable cam member 25 engages inner axial face 69 of second locking member 24, push button 15 is connected to cable 26, and when push button 15 is actuated, cable 26 rotates cable cam member 25, and engagement of cam surfaces 49, 74 moves cable cam member 25 axially away from upper seat member 21. This movement disengages the second locking member 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 lever 7 and a pin 77 that completes the restraint of the mechanism 52. There are two diametrically opposed pins 77 attached to the cover element 27 and extending axially, one pin 77 passing through each circumferential hole 57 in the lower seat element 22 and into a respective groove 51 in the upper seat element 21. Each pin 77 is locked in a position of minimum 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 respective groove 51 and is carried towards the other end of the respective hole 57 when the respective groove 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 is locked in position of minimum 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. First locking member 23 engages upper and

lower seat members

21, 22 to lock upper and

lower seats

12, 13 together in the open position. The cam surfaces 40 (on the adapter member 30) and 63 (on the first locking member 23) are partially engaged. The recess 51 and the hole 57 on the upper and

lower seat elements

21, 22 are in a position of minimum overlap and the pin 77 is locked between the upper and lower seat elements. This ensures that the restraining bar 7 is locked in the open position shown. The seat 3 is locked in the upright orientation as a whole by the engagement of the second locking member 22 with the upper seat element 21 in the adapter element 30. The cable cam member 25 is stowed 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 with the second locking member 24.

To change the orientation of seat 3, button 15 is pushed to pull cable 26 and rotate cable cam element 25. This engages the cam surfaces 49 and 74 and moves the cable cam member 25 axially towards the second locking member 24, which pushes the second locking member 24 axially out of engagement with the upper seat member 21 against the force in the spring, allowing the upper seat member 21 to rotate relative to the adaptor member 30. Seat 3 is still in the open position because first locking member 23 is not affected by this movement and continues to lock upper and

lower seat members

21 and 22 together. The seat 3 can assume 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 inclined orientation, the cam surfaces 40 and 63 are disengaged. When seat 3 is rotated to the upright orientation, cam surfaces 40 and 63 begin to engage and move first locking member 23 axially away from upper seat member 21 against the force in the spring. In the upright orientation, first locking member 23 remains engaged with upper and

lower seat members

21 and 22.

However, if seat 3 is moved beyond the upright orientation (i.e., clockwise in fig. 1), the engagement of cam surfaces 40 and 63 causes first lock 23 to move axially out of engagement with upper seat member 21. First locking member 23 is then fully received within lower seat element 22, unlocking upper seat 12 and lower seat 13 so that upper seat 12 may be rotated to the folded position relative to lower seat 13. As the upper seat element 21 rotates relative to the lower seat element 22, the recess 51 and the hole 57 begin to overlap more, thereby releasing the pin 77 and also rotating the cover element 27. Upper seat element 21 is moved further into engagement with pin 77, pushing pin 77 to the end of bore 57. Thus, the cover member 27 is rotated, and the restraining bar 7 is automatically moved 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 through approximately 180 deg. to lie adjacent the lower seat 13 in the folded position. In this position, first locking member 23 remains disengaged from upper seat member 21, but upon release of button 15, second locking member 24 moves axially to lock upper seat member 21 to adapter member 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 element 24. This enables upper seat element 21 to rotate relative to adapter element 30 and lower seat element 22, since first locking member 23 is not engaged with upper seat element 21. Rotation of the upper seat element 21 relative to the lower seat element 22 also enables the cover 27 to move, by engagement of the end of the groove 51 with the pin 77, and thus automatically pulls the restraining bar 7 into the open position. When the upper seat element 21 reaches the open position, the cam surfaces 40 and 63 allow the spring to push the first locking member 23 into engagement with the upper seat element 21 again, locking the upper and lower seat elements together, fixing the seat 3 in the open position, the restraint bar 7 being fixed by the pin 77 between the end of the recess 51 and the hole 57.

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

Claims

1. A 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), said upper and lower seats being movable between a folded position and an unfolded position of said seats by action of a manually operable element (15) and being movable in said unfolded position to at least two orientations relative to the or each mounting assembly, the or each mounting assembly (11) comprising an adapter element (20) adapted to engage with said frame (2), an upper seat element (21) mounting said upper seat (12), a lower seat element (22) mounting said lower seat (13), a first locking member (23) locking said upper seat element to said lower seat element in said unfolded position of said seat, And a second lock (24) locking one of the upper and lower seat elements in the at least two orientations to the adapter element, the seat in the open position being further movable to an unlocked orientation, the second lock (24) being released by action of the manually operable element (15) and the first lock (23) being released by engagement with the adapter element (20) when the seat is in the unlocked orientation.

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

3. A foldable child seat according to claim 1 or 2, wherein the relative rotation of the upper seat element (21) and the lower seat element (22) is limited to define the open position of the seat.

4. A foldable child seat according to claim 3, 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.

5. A foldable child seat according to claim 4, wherein two pins (77) are provided, each pin (77) being received in a respective pair of overlapping circumferential holes or grooves.

6. A foldable child seat according to claim 4 or 4, wherein the one or more pins are mounted on a cover element (27) which rotates about the common axis.

7. A foldable child seat according to claim 6, wherein the cover element (27) is mounted on the restraining bar (7).

8. A foldable child seat according to any one of the preceding claims, 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 releasing position.

9. A foldable child seat according to claim 8, wherein the first locking member (23) is ring-shaped with external teeth (60) engaging with internal teeth (50, 56) in the upper and lower seat elements.

10. A foldable child seat according to any one of the preceding claims, 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 protrusion (36) of the adaptor element.

11. A foldable child seat according to any one of the preceding claims, wherein a spring is provided which urges the first locking member (23) into engagement with the upper seat element (21) when the seat is unfolded to the open position.

12. A foldable child seat according to any one of the preceding claims, wherein the second lock (24) has teeth engaging the upper seat element (21) and the adapter element (20) and is axially movable into and out of a locked position and a released position.

13. A foldable child seat according to claim 12, wherein the second locking member (24) is ring-shaped with external teeth (65) engaging with internal teeth (47, 41) in the upper seat element (21) and the adapter element (20).

14. A foldable child seat according to any one of the preceding claims, 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 manually operable element (15) to axially move the second locking member (24) out of engagement with the upper seat element (21).

15. A foldable child seat according to claim 14, wherein a spring is provided to push the second locking member (24) back into engagement with the upper seat element (21) upon release of the manually operable element (15).

16. A foldable child seat according to claim 14 or 15, wherein the manually operable element (15) comprises a button for pulling a cable (26) attached to a cable cam element in order to rotate the cable (26).

17. A foldable child seat (3) comprising an upper seat (12), a lower seat (13), a restraining bar (7), and at least one mounting assembly (11) adapted to be mounted on a frame (2) of a child transporter (1), said upper and lower seats being movable between a folded position and an unfolded position of said seats by action of a manually operable element (15), the or each mounting assembly (11) comprising an adapter element (20) adapted to engage with said frame, an upper seat element (21) mounting said upper seat (12), a lower seat element (22) mounting said lower seat (13), and a restraining bar element (27) mounting said restraining bar (7), said restraining bar element having at least one pin (77), said pin (77) being received in overlapping circumferentially extending holes or grooves (51) in said upper (21) and lower (22) seat elements that are relatively rotatable 57) the arrangement being such that when the seat is in the open position, there is minimal overlap between the holes or recesses of the upper and lower seat elements, the pin being held between the ends of the holes or recesses and moving in the holes or recesses as the seat moves between the open and folded positions.

18. A foldable child seat according to claim 17, wherein the restraining bar element (27) has a pair of pins (77), each pin (77) operating in a respective pair of overlapping holes or grooves in the upper and lower seat elements.

19. A foldable child seat according to claim 17 or 18, wherein the upper and lower seat elements are locked by a lock (23) when the seat is in the open position.

20. A foldable child seat according to any one of claims 17-19, wherein each of the upper seat element (21), the lower seat element (22) has a hole for receiving a pin; or one of the upper seat element (21), the lower seat element (22) has a hole and the other has a corresponding recess.

21. A foldable child seat according to any one of claims 17-20, wherein the restraining bar element (27) acts as a cover element for the mounting assembly.

22. A foldable child seat according to any one of claims 17-21, wherein the restraining bar element (27) is rotatable relative to the adapter element (20).