JP7168723B2 - Child seat and its side protection width adjustment mechanism - Google Patents

Description

The present invention relates to an infant assist device, and more particularly to a child seat and its side protection width adjustment mechanism.

With the widespread use of child seats, people's demands for functionality of child seats are increasing more and more. It is required to be comfortable to sit on, and to be even easier to operate and use.

Here, the child seat is attached to the car and the child is securely fastened to the child seat using the seat belt, thereby effectively reducing the possibility of the child being injured even if the car suddenly stops or an unexpected accident occurs. can be done. A child seat usually comprises a chair, a backrest connected to the chair, a headrest connected to the backrest, and side protections, the headrest and side protections generally being adjustable relative to the backrest to suit the child's build. . Since conventional child seats are height-adjustable with respect to the backrest with side protections, the width of the headrests and side protections can be adjusted at the same time.

China Patent No. 103921705

However, when multiple child seats are installed in the rear seat of a car, the side protections of each child seat interfere with each other or with the car door, making it difficult to adjust the width of the side protections. The headrest cannot be adjusted accordingly, which is inconvenient for use.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a side protection width adjusting mechanism and a child seat that can adjust the width of the side protection without adjusting the height of the headrest.

To achieve the above object, a side protection width adjustment mechanism according to one aspect of the present invention is used in a child seat provided with a backrest, a headrest, and a pair of side protections on both left and right sides of the backrest. , a side protection width adjustment mechanism for adjusting the width between the pair of side protections, the mechanism being provided between the pair of side protections and the backrest and acting on the pair of side protections and when the headrest of the child seat is in a first state in which it is moved to a relatively low position, the width between the pair of side protections narrows so that the headrest of the child seat is configured to adjust the width between the pair of side protections so that the width between the pair of side protections is widened when in a second state in which it is moved to a relatively high position, When the external force applied to the pair of side protections is greater than the elastic force of the elastic structure, the pair of side protections are moved by the interference of the external force to adjust the width between the pair of side protections.

The side protection width adjustment mechanism of the present invention comprises a driving slant groove provided in the side protection and a driving member fixed to the headrest and fitted in the driving slant groove, and an elastic structure is provided between the side protection and the body of the child seat. have. With this structure, when adjusting the height of the headrest, the side protectors are driven by the drive member and the drive slant groove so as to adjust the width. The width of the side protection is elastically adjusted even when the width is large. Thus, the width of the side protection can be adjusted without adjusting the height of the headrest, which reduces interference and is convenient and easy to operate in use. A child seat provided with the side protection width adjusting mechanism of the present invention can also obtain the same effect.

1 is a perspective view showing the structure of one embodiment of the child seat of the present invention; FIG. 1 is a perspective view of the headrest and side protections of the child seat of the invention in a first position; FIG. Fig. 4 is a perspective view of the headrest and side protections of the child safety seat of the present invention in a second state; FIG. 3 is a diagram when FIG. 2 is viewed from the front; FIG. 3 is a diagram when FIG. 2 is viewed obliquely from behind; It is a figure explaining a slide connection structure. 7 is an enlarged view of the range of symbol A in FIG. 6. FIG. FIG. 4 is an enlarged view of the side protection; FIG. 4 is a diagram of the side protection of the child seat in a state where it is not yet subjected to external force interference; FIG. 10 is a diagram of a state after interference of an external force occurs in the side protection in FIG. 9; FIG. 4 is an explanatory view showing another embodiment of the child seat of the present invention; FIG. 12 is an explanatory diagram of the structure of the driving member of FIG. 11; Figure 12 is a view of the drive member of Figure 11 from a first angle; Figure 12 is a second angle view of the drive member of Figure 11; Figure 12 is a third angle view of the drive member of Figure 11;

A child seat 1 of the present invention will be described with reference to FIGS. 1 to 5. FIG. Here, FIG. 1 is a perspective view showing the structure of an embodiment of the child seat according to the present invention, FIG. 2 is a perspective view showing the headrest and side protection of the child seat according to the present invention when they are in the first state, and FIG. 4 is a perspective view of the child seat of the present invention when the headrest and side protection are in a second state, FIG. 4 is a view of FIG. 2 viewed from the front, and FIG. 5 is a view of FIG. It is a diagram in the case of

As shown in FIG. 1 , the child seat 1 of this embodiment comprises a base 10 , a chair 20 , a backrest 30 , a headrest 40 and a pair of side protectors 50 . The pedestal 10 is for supporting the whole child seat 1 from below. A chair 20 is provided on the base 10 . A backrest 30 is provided extending vertically from the rear end of the chair 20 . A headrest 40 is connected to the upper end of the backrest 30 . A pair of side protections 50 are connected to two opposite sides of the backrest 30 and formed on both sides of the backrest 30 to protect the sides of a child riding on the vehicle.

Further, as shown in FIG. 5, the headrest 40 is provided with an operation portion 41 on the back side, and the operation portion 41 is used to adjust the height of the headrest.

FIG. 6 will also be described. FIG. 6 is a diagram for explaining a slide connecting structure 70, which will be described later. The child seat 1 further comprises a side protection width adjustment mechanism 60 . The side protection width adjusting mechanism 60 is provided between the headrest 40 and the side protection 50, and when the height of the headrest 40 is adjusted, the headrest 40 is adjusted by the side protection width adjusting mechanism 60 with both side protections 50. rotate on its axis. This allows the width between the side protections 50 to be adjusted and is convenient for use with infants of different sizes.

In addition, when the width between both side protectors 50 is widened and interferes with other objects, the width can be narrowed by pivoting the side protectors 50 inward without adjusting the height of the headrest 40. .

This embodiment will be described with continued reference to FIG. The lower ends of the side protections 50 are pivotally supported on the backrest 30 . The side protection 50 is pivoted with the height adjustment of the headrest 40 . The upper end of the side protection 50 is slidably connected to the backrest 30 by a slide connection structure 70, and serves as a buffer space when the side protection 50 receives external force.

Specifically, the slide connection structure 70 includes a guide groove 71 and a guide member 72, as shown in FIG. 8 is an enlarged view of the side protection 50. FIG. A guide groove 71 is provided in either the side protection 50 or the backrest 30 . The guide member 72 is fitted in the slide groove 71 and slides along the slide groove 71 . The guide member 72 is fixed to either the side protection 50 or the backrest 30 . In this embodiment, the guide groove 71 is formed to extend in the front-rear direction at the upper end of the side protection 50 as shown in FIG. A guide member 72 is provided to be fitted into the guide groove 71 and fixed to the backrest 30 to allow the side protection 50 to move relative to the guide member 72 .

9 and 10, the backrest 30 has one convex rib 31. As shown in FIG. Here, FIG. 9 shows a state in which the side protection of the child seat is not yet subjected to external force interference. On the other hand, FIG. 10 is a diagram of a state after external force interference occurs in the side protection in FIG. The convex rib 31 can position the side protection 50 when the side protection 50 moves relative to the backrest 30 under external force interference.

The structure of the side protection width adjusting mechanism 60 of the child seat 1 of this embodiment will be further described with reference to FIGS. 4 to 10. FIG.

First, description will be made with reference to FIGS. 4, 6, and 7. FIG. The side protection width adjusting mechanism 60 has a driving member 61 and a driving inclined groove 62 . Here, FIG. 7 is an enlarged view of the range of symbol A in FIG. A drive slant groove 62 is provided in the side protection 50, and the drive slant groove 62 has a first portion 621 and a second portion 622 presenting a predetermined angle (FIG. 7).

The extending directions of the first portion 621 and the second portion 622 are not parallel to the sliding direction of the headrest 40 (see FIG. 7). The driving member 61 is fixed to the headrest 40 and slidably coupled along the driving slant groove 62, and the driving slant groove 62 is provided with an elastic structure.

Therefore, when adjusting the height of the headrest 40, the interaction between the driving member 61 and the driving inclined groove 62 drives the side protectors 50 to rotate, thereby adjusting the width between the side protectors 50. On the other hand, when the side protector 50 receives interference from an external force, the side protector 50 can be rotated inward by the tension generated by pushing the elastic structure in the driving inclined groove 62, so that the height of the headrest 40 can be adjusted. Only the width of the side protection 50 can be adjusted without

Continuing with reference to FIG. 4 , the drive member 61 comprises a drive rod 611 and a spigot 612 . A drive rod 611 is fixed to the headrest 40 . A spigot 612 is secured to the end of the drive rod 612 . The insert 612 is slidably provided in the driving slant groove 62 . For this reason, when the headrest 40 slides up and down, the drive rod 611 is entrained so that the insert 612 and the drive slant groove 62 interact to drive the side protection 50 to adjust the width. can be done.

In particular, the backrest 30 is formed with a chute 32 extending along the vertical direction, the inset 612 is slidably fitted into the chute 32, and the chute 32 guides the sliding movement of the inset 612.

Next, description will be made with reference to FIGS. The side protection 50 is provided with a ridge 51, and one side of the ridge 51 is provided with a long groove 62' (see FIG. 8). Between the long groove 62' and the convex edge 51, as shown in FIG. 9, an elastic contact member 63 is provided by pivot connection. The elastic contact member 63 is movable between a first position away from the convex edge 51 and a second position close to the convex edge 51, and when the elastic contact member 63 is at the first position, the elastic contact member 63 extends above the long groove 62' to form the driving slant groove 62 between the elastic abutment member 63 and the side wall 620' of the long groove 62' (see FIG. 7); is held to

In this state, when the insert 612 slides upwards, the insert 612 acts on the elastic abutment member 63 and the interaction between the insert 612 and the elastic abutment member 63 pivots the side protection 50 . In addition, while the insert 612 slides upward, the elastic abutment member 63 is always positioned at the first position and does not deform the driving inclined groove 62 . In contrast, in the process of sliding the inset 612 downward, the inset 612 acts on the side wall 620' (the other side wall of the drive groove 62), thereby pivoting the side protection 50 in the opposite direction.

When the side protection 50 is in the wide width state and receives an external force, the insert 612 pushes out the elastic contact member 63 due to the external force to rotate the elastic contact member 63 from the first position to the second position, The tension created thereby can cause the side protection 50 to rotate, without the need to adjust the position of the headrest 40 at this time.

As shown in FIGS. 7-8, the side protection 50 is provided with a contact block 52 projecting therefrom. The contact block 52 extends upward from the upper end wall of the slot 62'. When the elastic contact member 63 is located at the first position, it always contacts the contact block 52 due to its elastic force. Therefore, the shape of the driving inclined groove 62 surrounded by the elastic contact member 63 together with the side wall 620' of the long groove 62' does not change (FIG. 7).

Description will be made below with reference to FIG. The long groove 62' has a substantially fan-shaped first portion 621' and an elongated second portion 622. As shown in FIG. The width of the first portion 621' gradually widens from the bottom to the top. As a result, when the side protector 50 is interfered with by an external force, the side protector 50 moves relative to the backrest 30, but the width of the first portion 621' provides a space for the insert 612 to move relatively. can be done.

Description will be made with reference to FIGS. 7 to 9. FIG. The elastic abutment member 63 comprises an abutment member 631 rotatably connected to the side protection 50 and an elastic member 632 in contact between the abutment member 631 and the tongue 51 . The elastic member 632 continuously provides momentum to move the abutment member 631 from the second position to the first position. In this embodiment, the contact member 631 is rotatably connected to the side protection 50 at its lower end. Elastic member 632 is a spring. The spring contacts between the upper end of the abutment member 631 and the tongue 51 . The elastic force of the spring brings the upper end of the contact member 631 into contact with the contact block 52 . As a result, the contact member 631 and the side wall 620' of the long groove 62 define the driving inclined groove 62 in which the insert 612 slides. The interaction of the insert 612 and the drive ramp 62 drives the side protection 50 to pivot.

Note that the elastic member 632 is not limited to a spring, and may be a torsion spring provided at the connecting portion of the contact member 631 to the side protection 50 .

Description will be made with reference to FIGS. 7 to 9. FIG. A positioning block 6311 and a protrusion 6312 extending in opposite directions are provided at the upper end of the contact member 631 . One end of the elastic member 632 is housed in the positioning block 6311 and the other end contacts the convex edge 51 . The protrusion 6312 contacts the contact block 52 when the abutment member 631 is positioned at the first position.

An engagement block 6313 is provided on the tip side of the contact member 631 . The engagement block 6313 intersects the pivot plane of the abutment member 63 . A positioning member 53 corresponding to the engaging block 6313 is fixed to the side protection 50 . The engaging block 6313 slides to engage with the positioning member 53 .

Different states of the child seat 1 in this embodiment will be described with reference to FIGS. 1 to 10. FIG.

First, description will be made with reference to FIG. FIG. 2 is a perspective view of the headrest 40 and side protection 50 of the child seat of the present invention in the first position. In this state, the height of the headrest 40 is relatively low and the width between the side protections 50 is relatively narrow.

When the headrest 40 is slid upward, the headrest 40 entrains the drive rod 611 fixed to the headrest 40 in the process, as shown in FIGS. As a result, the insert 612 fixed to the end of the drive rod 611 slides upward along the chute 32 (see FIGS. 3 and 4).

As the insert 612 slides upward, it interacts with the side wall of the driving slant groove 62, specifically, the elastic member 632 exerts an elastic force on the contact member 631, causing the contact block 52 to contact the contact member 631 all the time. Let That is, the inclined drive groove 62 is maintained in shape and is substantially not deformed. As shown in FIGS. 6 and 7, in this process, the shape of the driving slant groove 62 is maintained and substantially unchanged, so that the insert 612 slides upward on the chute 32 and interacts with the abutment member 631. As a result, the side protections 50 pivot outward, so that the width between the two side protections 50 increases as the insert 612 slides upward. When the adjustment is completed in this way, the headrest 40 is adjusted to a relatively high position and the width of the side protection 50 is also relatively wide. As shown in FIGS. 3 and 9, at this time, the insert 612 can be maintained in place and the elastic member 632 can provide a buffer space when subjected to external forces and interferes, as will be detailed below. .

When the side protection 50 of the child seat 1 is relatively wide as shown in FIG. 9, it may interfere with the side protection of other child seats or the door of the vehicle. At this time, the side protection 50 is pressed by another child seat or the door of the car, and the side protection 50 is caused to slide against the backrest 30 until the position shown in FIG. In this process, the abutment member 631 pivots from the first position to the second position. The abutment member 631 pivots to compress the elastic member 632 and the tension created thereby causes the side protections 50 to rotate inward, narrowing the width between the side protections 50 . This continues until the abutment member 631 rotates to the second position and abuts the tongue 51 to the condition shown in FIG. In this way it is possible to adjust the width of the side protection 50 without adjusting the height of the headrest 40 . When the compression is released, the compressed elastic member 632 recovers to its original state and the tension created thereby causes the side protections 50 to pivot outward to their pre-interference width. can be done.

In another embodiment, the elastic force exerted by the elastic member 632 on the abutment member 631 causes the insert 612 to slide upward to the front of the first portion 621' of the long groove 62', thereby changing the shape of the driving oblique groove 62. insufficient to maintain. At this time, the abutting member 631 is displaced to change the shape of the drive inclined groove 62, thereby allowing the width of the side protection 50 to change when an external force directed from the inside to the outside is applied to the side protection 50. space is provided. In this embodiment, when the insert 612 continues to slide upward along the chute 32 to the rear stage of the first portion 621' of the long groove 62', the elastic force acting on the contact member 631 by the elastic member 632 is This is sufficient to bring the contact block 52 into contact with the contact member 631 again. That is, the shape of the drive inclined groove 62 is restored to the state before the contact member 631 was displaced, thereby pushing the side protection 50 to rotate outward.

On the other hand, in the process of adjusting the height of the headrest 40 from the state shown in FIG. 3 to the state shown in FIG. A horizontal force acting on the side walls 620') and acting on the side walls 620' of the inset 612 can drive the side protections 50 to pivot inwardly, thereby increasing the distance between the side protections 50. The width can be narrowed.

Another embodiment of the child seat of the present invention will be described below with reference to FIGS. 11 to 15. FIG. FIG. 11 is an explanatory diagram showing the structure of another embodiment of the child seat. 12 is an explanatory view of the structure of the drive member of FIG. 11, and FIG. 13 is a view of the drive member of FIG. 11 viewed from a first angle. 14 is a view of the driving member of FIG. 11 viewed from a second angle. Figure 15 is a third angle view of the drive member of Figure 11; Since the child seat 1 differs from the above-described embodiment only in the adjustment mechanism 60 for the side protection width, only the different points will be described below, and redundant description will be omitted.

First, description will be made with reference to FIGS. 11 to 13. FIG. The side protection width adjustment mechanism 60 includes a drive member 61' fixed to the headrest 40, and a drive oblique groove 62 provided in the side protection 50 and slidably coupled with the drive member 61'. The driving slant groove 62 has a first portion 621 and a second portion 622 presenting a predetermined angle. Both the first portion 621 and the second portion 622 have an elongated shape and are not parallel to the sliding direction of the headrest 40 . Thus, when the height of the headrest 40 is adjusted, the interaction of the drive member 61' and the drive ramp 62 can drive the side protection 50 to pivot and adjust its width.

In this embodiment, the driving member 61' is provided with an elastic means that operates as an elastic structure, and when the side protection 50 is interfered by an external force, the portion corresponding to the elastic means of the driving member 61' is pushed and moved, and is tensioned. is generated, which allows the side protection 50 to pivot inwards, and allows adjustment of the width of the side protection 50 without adjusting the height of the headrest 40 . Also, when the external force interference disappears, the compressed driving member 61' recovers to its original state and tension is generated, which causes the side protections 50 to be directed outward to the relatively wide state before the interference. It can be rotated on its axis.

This embodiment will be described below with reference to FIG. The driving member 61' has an elastic member 611' fixed to the headrest 40 and an insert 612 connected to the elastic member 611'. In addition, the elastic member 611' includes a fixing portion 6111', a connecting portion 6112', and a pusher portion 6113' having an inclined structure connected therebetween. The pusher portion 6113' has elasticity. The fixing part 6111' is engaged in and fixed with the headrest 40, and the connecting part 6112' is provided with an insert 612 to form a hole. The insert 612 is slidably connected within the driving slant groove 62 . When the side protection 50 receives interference from an external force, the pusher portion 6113' receives pressure and undergoes deformation. This creates an outward tension force that pushes the side protection 50 to pivot inward.

In this embodiment, the elastic member 611' is a torsion spring made of steel wire or iron wire.

As shown in FIG. 14 , in this embodiment, the sliding connection structure 70 comprises a guide groove 71 provided in the backrest 30 and a guide member 72 fixed to the side protector 50 . The guide member 72 and the guide groove 71 are slidably connected to limit the movement of the side protection 50 via the guide groove 71 . Of course, the same effect can be obtained by providing the guide groove 71 in the side protection 50 and providing the backrest 30 with the guide member 72 slidably coupled thereto.

Since the method of adjusting the width of the side protection 50 of the child seat 1 of this embodiment is the same as that of the above-described embodiment, the description thereof will be omitted.

The side protection width adjustment mechanism 60 of the present invention includes driving members 61 and 61' fixed to the headrest 40 and driving slant grooves 62 provided in the side protection 50. The driving members 61 and 61' , and one of the drive members 61, 61' and the drive inclined groove 62 is provided with a member that functions as an elastic structure. Therefore, when adjusting the height of the headrest 40, the width of the side protection 50 can be adjusted by the drive members 61, 61' and the drive inclined groove 62. FIG. Further, when the external force that interferes with the side protection 50 is greater than the elastic force of the elastic structure, the width of the side protection 50 is elastically adjusted. The width can be changed to achieve the purpose of reducing interference. Also, it is easy to use. Further, the child seat 1 provided with the side protection width adjusting mechanism 60 also has the same effect.

The structure of other parts of the child seat 1 of the present invention is the same as those well known to those skilled in the art, so the explanation is omitted. The above examples are merely examples for carrying out the present invention, and are not intended to limit the technical scope of the invention. It shall belong to the technical scope of the invention.

The side protection width adjustment mechanism and child seat according to the present invention are useful in situations where a plurality of child seats are provided in the rear seat of a vehicle and the side protections of each child seat interfere with each other or with the door of the vehicle.

Reference Signs List 1 child seat 10 pedestal 20 chair 30 backrest 31 convex rib 32 chute 40 headrest 41 operation part 50 side protection 51 convex edge 52 contact block 53 positioning member 60 side protection width adjustment mechanism 61 drive member 61' drive member 62 drive inclined groove 62' Long groove 611 Drive rod 611' Elastic member 6111' Fixed part 6112' Connecting part 6113' Pusher part 612 Insertion 620' Side wall 621 First part 621' First part 622 Second part 63 Elastic contact member 631 Contact member 6311 positioning block 6312 protrusion 6313 engagement block 632 elastic member 70 slide connection structure 71 guide groove 72 guide member

Claims (26)

A side protection width adjustment mechanism used in a child seat provided with a backrest, a headrest, and a pair of side protections on both left and right sides of the backrest, for adjusting the width between the pair of side protections. hand,
driving inclined grooves respectively provided in the pair of side protections;
a drive member fixed to the headrest of the child seat and slidably coupled to the drive ramp;
The drive member is provided between the pair of side protectors and the backrest, and is slidably coupled to the drive slant groove when adjusting the height of the headrest. a resilient structure providing a resilient force acting on said pair of side protections to provide width adjustment ;
When the headrest of the child seat is in a first state moved to a relatively low position, the width between the pair of side protections narrows and the headrest of the child seat moves to a relatively high position. is configured to adjust the width between the pair of side protections so that the width between the pair of side protections is widened when in the second state,
When the external force applied to the pair of side protections is greater than the elastic force of the elastic structure, the pair of side protections are moved by the interference of the external force to adjust the width between the pair of side protections. A side protection width adjustment mechanism characterized by: The elastic structure adjusts the width between the pair of side protections without adjusting the height of the headrest of the child seat when the external force applied to the pair of side protections is greater than the elastic force of the elastic structure. 2. A side protection width adjustment mechanism according to claim 1, characterized in that it is configured to narrow. 4. The elastic structure creates a tension force that causes the pair of side protections to pivot outwardly to increase the width between the pair of side protections when the external force is released. The side protection width adjustment mechanism according to claim 1 or 2. The side protection width adjustment mechanism according to any one of claims 1 to 3, wherein the elastic structure is arranged between the side protection and the headrest. 2. The pair of side protections are arranged to pivot such that the width between the pair of side protections is adjusted while the headrest of the child seat is adjusted in height. The side protection width adjustment mechanism according to any one of claims 4 to 4. The resilient structure is configured to allow the pair of side protections to pivot inwardly without adjusting the height of the headrest of the child seat when the external force is applied to the side protections. The side protection width adjusting mechanism according to any one of claims 1 to 5, characterized in that: The drive member includes an insert slidably mounted within the drive angled groove, the width between the pair of side protections increasing as the insert moves along the drive angled groove to a relatively low position. narrowing, the width between the pair of side protections widens as the inset moves to a relatively higher position along the drive angled groove,
The side according to any one of claims 1 to 6, characterized in that when the insert moves along the drive slanted groove, the drive slanted groove is not deformed by the elastic force of the elastic structure. Protection width adjustment mechanism. 8. The side protection width adjusting mechanism according to claim 7, wherein the extending direction of the driving inclined groove intersects with the height adjusting direction of the headrest. The driving member has a fixed portion fixed to the headrest, and has an elastic member extending from the fixed portion to a connecting portion opposite to the fixed portion to form the elastic structure, Claim 7 or Claim 8, wherein the connecting portion is provided with the insert so that the driving member is deformed to allow the pair of side protections to rotate when the driving member receives an external force. side protection width adjustment mechanism described in . The elastic member has a pusher part having an inclined structure connected between the fixing part and the connection part, and the pusher part is elastically deformed when the pair of side protectors receives the interference. The side protection width adjusting mechanism according to claim 9. 11. The side protection width adjusting mechanism according to claim 9, wherein said elastic member is a torsion spring. An elastic abutment member is provided on the pair of side protections and forms a wall on one side of the drive slant groove, the elastic abutment member is configured to act as the elastic structure, and 9. The pair of side protections according to claim 7 or 8, wherein when the protections receive the interference, the elastic abutting members are deformed by receiving the interference, so that the pair of side protections can be axially rotated. side protection width adjustment mechanism. Long grooves are formed in the pair of side protections, and the elastic contact member is axially movably positioned on one side of the long groove, and receives an external force to move the elastic contact member to the driving inclined groove. It is constructed so that it can move back and forth between a first position, which is a position where one side wall is formed, and a second position, where the elastic contact member is deformed to deform the drive inclined groove. 13. The side protection width adjusting mechanism according to claim 12. The long groove has a first portion on the upper side and a second portion on the lower side, the width of the first portion being wider than the width of the second portion, and the elastic contact member 14. A side according to claim 13, wherein the side wall of claim 13 is axially displaceable near a portion of and extends to said first portion to form said one side wall of said drive ramp groove. Protection width adjustment mechanism. The elastic abutment member is pivotally supported by the pair of side protections, and the abutment member continuously provides a force to move the abutment member from the second position to the first position. 15. The side protection width adjustment mechanism according to claim 13, further comprising an elastic member interposed between the contact member and the side protection. The elastic member is in contact with the side of the contact member opposite to the side supported by the pair of side protections and the pair of side protections. 16. A side protection width adjustment mechanism according to claim 15, characterized in that a positioning block is provided which accommodates a . A protrusion is formed on one side of the contact member, and the pair of side protections has a contact block relatively corresponding to the protrusion, when the contact member is moved to the first position. 17. The side protection width adjusting mechanism according to claim 15 or 16, wherein said protrusion contacts said contact block. The contact member is further provided with an engagement block, a positioning member corresponding to the engagement block is fixed to the side protection, and the engagement block is slidably engaged with the positioning member to engage the contact. 18. The side protection width adjusting mechanism according to any one of claims 15 to 17, wherein rotation of the contact member is positioned. The abutment member is further provided with an engagement block, the pair of side protections is fixed with a positioning member corresponding to the engagement block, and the engagement block is slidably engaged with the positioning member. 19. The side protection width adjusting mechanism according to any one of claims 15 to 18, characterized in that rotation of said contact member is positioned. A side protection width adjustment mechanism for adjusting the width between a pair of side protections on both left and right sides of the backrest of a child seat,
provided between the headrest of the child seat and at least one side protection of the pair of side protections,
a driving ramp groove provided in the at least one side protection;
a drive member fixed to the headrest of the child seat and slidably coupled to the drive ramp;
between the pair of side protectors by interposition of the drive member provided between the at least one side protector and the backrest and slidably coupled to the drive ramp when adjusting the height of the headrest; a resilient structure providing a resilient force acting on said at least one side protection to provide adjustment of the width of the
The pair of side protections are pivoted such that the width between the pair of side protections is adjusted by interaction of the drive member and the drive ramp groove while the headrest of the child seat is being adjusted in height. configured to rotate; and
When an external force is applied to the at least one side protection, the tension caused by the pushing movement of the resilient structure in the drive ramp groove causes the pair of side protections to be opened without adjusting the height of the headrest of the child seat. A side protection width adjustment mechanism, characterized in that it is constructed so as to be axially rotatable inward. 21. The mechanism for adjusting the width of side protections according to claim 20, comprising a resilient structure providing a resilient force acting on said at least one side protection. The elastic structure adjusts the width between the pair of side protections by moving the at least one side protection when the external force applied to the at least one side protection is greater than the elastic force of the elastic structure. 22. The side protection width adjusting mechanism according to claim 21, characterized in that it is configured as follows. A child seat comprising a chair, a backrest connected to said chair, a headrest slidably connected to said backrest, and a pair of side protections on opposite sides of said backrest,
A child seat comprising the side protection width adjusting mechanism according to any one of claims 1 to 22. 24. A child seat according to claim 23, wherein the pair of side protections are slidably connected to the backrest at their upper ends and journalled to the backrest at their lower ends. A guide groove is formed in one of the pair of side protectors and the backrest, and the other of the pair of side protectors and the backrest without the guide groove is slidably coupled to the guide groove. 25. A child seat according to claim 23 or 24, wherein the member is fixed. The child seat according to any one of claims 23 to 25, wherein the headrest is provided with an operation portion, and the height of the headrest relative to the backrest is adjustable by the operation portion.

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