Side protection width adjustment mechanism and child seat

Abstract

Provides an adjustment mechanism for the width of the side protection. [Solution] The adjustment mechanism comprises a drive member fixedly positioned on the headrest of the child seat, and an elastic structure provided between the two side protections and the backrest of the child seat, which drives the two side protections to adjust the width between them when the height of the headrest is adjusted, through the intervention of the drive member. When the external force applied to the side protection is greater than the elastic force of the elastic structure, the width of the side protection is elastically adjusted by interference from the external force.

Description

TECHNICAL FIELD

[0001] The present invention relates to an auxiliary device for young children, and in particular to a child seat and an adjustment mechanism for the side protection width thereof. BACKGROUND ART

[0002] With the widespread use of child seats, people's demands for the functionality of child seats are also increasing. A child seat is required not only to ensure safety while a young child is seated, but also to provide a comfortable sitting experience for the young child sitting on the child seat, and to be even simpler to operate and use.

[0003] Here, the child seat is mounted on a vehicle, and by using a seat belt to securely fasten the young child to the child seat, the probability of the young child being injured even if the vehicle suddenly stops or an unexpected accident occurs can be effectively reduced. A child seat usually includes a seat base, a backrest connected to the seat base, a headrest connected to the backrest, and side protections, and the positions of the headrest and the side protections are generally adjustable relative to the backrest to match the physique of the young child. In conventional child seats, the height of the headrest can be adjusted relative to the backrest together with the side protections, whereby the widths of the headrest and the side protections can be adjusted at the same time. PRIOR ART DOCUMENTS PATENT DOCUMENTS

[0004] PATENT DOCUMENT 1 Chinese Patent No. 103921705 Specification SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0005] However, when multiple child seats are installed in the back seat of a car, the side protection of each child seat interferes with each other or with the car door, making it difficult to adjust the width of the side protection. Consequently, the headrests cannot be adjusted either, making it inconvenient to use.

[0006] Therefore, the present invention aims to provide a side protection width adjustment mechanism and a child seat that can adjust the width of the side protection without requiring adjustment of the headrest height. [Means for solving the problem]

[0007] To achieve the above objective, 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 the left and right sides of the backrest, and is a side protection width adjustment mechanism for adjusting the width between the pair of side protections, comprising an elastic structure provided between the pair of side protections and the backrest, which provides an elastic force acting on the pair of side protections, and is configured to adjust the width between the pair of side protections such that when the headrest of the child seat is in a first state where it is moved to a relatively low position, the width between the pair of side protections becomes narrower, and when the headrest of the child seat is in a second state where it is moved to a relatively high position, the width between the pair of side protections becomes wider, and when an 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 interference from the external force and the width between the pair of side protections is adjusted. [Effects of the Invention]

[0008] The side protection width adjustment mechanism of the present invention is provided on the side protection. The child seat is equipped with a dynamic inclined groove and a drive member fixed to the headrest and conforming to the drive inclined groove, and has an elastic structure between the side protection and the body of the child seat. With this structure, when the height of the headrest is adjusted, the drive member and drive inclined groove drive the side protection to adjust its width, so even if the external force that interferes with the side protection is greater than the elastic force of the elastic structure, the width of the side protection is elastically adjusted. Therefore, the width of the side protection can be adjusted without adjusting the height of the headrest, thus reducing interference and making it convenient and easy to operate. A child seat equipped with the side protection width adjustment mechanism of the present invention can also obtain the same effect. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view showing the structure of one embodiment of the child seat of the present invention. [Figure 2] This is a perspective view of the headrest and side protection of the child seat of the present invention when they are in a first state. [Figure 3] This is a perspective view of the headrest and side protection of the child seat of the present invention when they are in a second state. [Figure 4] Figure 2 is a view from the front. [Figure 5] Figure 2 is a view from diagonally behind. [Figure 6] This is a diagram illustrating a sliding connection structure. [Figure 7] This is an enlarged view of the area indicated by symbol A in Figure 6. [Figure 8] This is a close-up view of the side protection. [Figure 9] This diagram shows the side protection of a child car seat before it has been subjected to external force interference. [Figure 10] Figure 9 shows the state after external force interference occurs to the side protection. [Figure 11] This is an explanatory diagram showing another embodiment of the child seat of the present invention. [Figure 12] This is an explanatory diagram of the structure of the drive member in Figure 11. [Figure 13] This is a view of the drive member in Figure 11 as viewed from a first angle. [Figure 14] This is a view of the drive member in Figure 11 as viewed from a second angle. [Figure 15] This is a view of the drive member in Figure 11 as viewed from a third angle. Forms for Carrying Out the Invention

[0010] The child seat 1 of the present invention will be described with reference to Figure 1 to Figure 5. Here, Figure 1 is a perspective view showing the structure of an embodiment of the child seat of the present invention, Figure 2 is a perspective view when the headrest and side protections of the child seat of the present invention are in a first state, Figure 3 is a perspective view when the headrest and side protections of the child seat of the present invention are in a second state, Figure 4 is a view of Figure 2 as viewed from the front, and Figure 5 is a view of Figure 2 as viewed from the diagonally rear side.

[0011] As shown in Figure 1, the child seat 1 of the present embodiment includes a base 10, a seat 20, a backrest 30, a headrest 40, and a pair of side protections 50. The base 10 is for supporting the entire child seat 1 from below. The seat 20 is disposed on the base 10. The backrest 30 is disposed to extend in the vertical direction from the rear end of the seat 20. The headrest 40 is connected to the upper end of the backrest 30. The pair of side protections 50 are connected to two opposite side edges of the backrest 30, are formed on both sides of the backrest 30, and serve to protect the side surfaces of a child riding in the seat.

[0012] Further, as shown in Figure 5, the headrest 40 is provided with an operation unit 41 on the back side, and the operation unit 41 is used to adjust the height of the headrest.

[0013] Description is also made with reference to Figure 6. Figure 6 is a diagram for explaining a slide connection structure 70 described later. The child seat 1 further includes a side protection width adjustment mechanism 60. The side protection width adjustment mechanism 60 is provided between the headrest 40 and the side protections 50. When height adjustment is performed on the headrest 40, the headrest 40 is pivoted together with both side protections 50 by the side protection width adjustment mechanism 60. As a result, the width between the two side protections 50 is adjusted, which is convenient for use by infants of different sizes.

[0014] In addition, when the width between the two side protections 50 is widened and interferes with other objects, the side protections 50 can be pivoted inward to narrow the width without adjusting the height of the headrest 40.

[0015] This embodiment will be described with continued reference to Figure 6. The lower end of the side protection 50 is pivotally supported on the backrest 30. The side protection 50 is pivoted as the height of the headrest 40 is adjusted. 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 an external force.

[0016] Specifically, as shown in Figure 8, the slide connection structure 70 includes a guide groove 71 and a guide member 72. Note that Figure 8 is an enlarged view of the side protection 50. The guide groove 71 is provided on either one of the side protection 50 and the backrest 30. The guide member 72 is fitted into the slide groove 71 and slides along the slide groove 71. The guide member 72 is fixed to the other one of the side protection 50 and the backrest 30. In this embodiment, as shown in Figure 8, the guide groove 71 is formed at the upper end of the side protection 50 so as to extend in the front-rear direction. The guide member 72 is provided so as to be fitted into the guide groove 71, is fixed to the backrest 30, and causes the side protection 50 to move relative to the guide member 72.

[0017] Referring to Figures 9 and 10, the backrest 30 is provided with a single convex rib 31. Here, Figure 9 shows the child seat's side protection before it is subjected to external force interference. On the other hand, Figure 10 shows the side protection in Figure 9 after it has been subjected to external force interference. When the side protection 50 is subjected to external force interference and moves relative to the backrest 30, the convex rib 31 can position the side protection 50.

[0018] Referring to Figures 4 to 10, the structure of the side protection width adjustment mechanism 60 of the child seat 1 in this embodiment will be further explained.

[0019] First, let's explain with reference to Figures 4, 6, and 7. The side protection width adjustment mechanism 60 comprises a drive member 61 and a drive inclined groove 62. Here, Figure 7 is an enlarged view of the area indicated by reference numeral A in Figure 6. The drive inclined groove 62 is provided on the side protection 50, and the drive inclined groove 62 has a first portion 621 and a second portion 622 that exhibit a predetermined angle (Figure 7).

[0020] The first portion 621 and the second portion 622 are configured such that their extension directions are not parallel to the sliding direction of the headrest 40 (see Figure 7). The drive member 61 is fixed to the headrest 40 and is slidably coupled along the drive inclined groove 62, and the drive inclined groove 62 is provided with an elastic structure.

[0021] Therefore, when adjusting the height of the headrest 40, the interaction of the drive member 61 and the drive inclined groove 62 drives the side protection 50 to rotate on its axis, thereby adjusting the width between the side protections 50. On the other hand, when the side protection 50 is subjected to external force interference... When this happens, the tension generated by the movement of the elastic structure in the drive inclined groove 62 allows the side protection 50 to rotate inward, so that the width of the side protection 50 can be adjusted without adjusting the height of the headrest 40.

[0022] Referring to Figure 4, the drive member 61 comprises a drive rod 611 and an insert 612. The drive rod 611 is fixed to the headrest 40. The insert 612 is fixed to the end of the drive rod 612. The insert 612 is slidably provided within the drive inclined groove 62. Therefore, when the headrest 40 slides up and down, the drive rod 611 moves with it, causing the insert 612 and the drive inclined groove 62 to interact with each other, thereby driving the side protection 50 and adjusting its width.

[0023] In particular, the backrest 30 has a chute 32 that extends vertically, and the insert 612 is slidably fitted into the chute 32, with the chute 32 guiding the sliding movement of the insert 612.

[0024] Next, the following will be explained with reference to Figures 6-8. The side protection 50 is provided with a convex edge 51, and a long groove 62' is provided on one side of the convex edge 51 (see Figure 8). Between the long groove 62' and the convex edge 51, an elastic contact member 63 is provided by pivot connection, as shown in Figure 9. The elastic contact member 63 can move between a first position away from the convex edge 51 and a second position close to the convex edge 51. When the elastic contact member 63 is in the first position, the elastic contact member 63 extends above the long groove 62', forming the drive inclined groove 62 between the elastic contact member 63 and the side wall 620' of the long groove 62' (see Figure 7), and the insert 612 is held within the drive inclined groove 62.

[0025] In this state, when the insert 612 slides upward, it acts on the elastic contact member 63, and the interaction between the insert 612 and the elastic contact member 63 causes the side protection 50 to rotate on its axis. Also, during the process of the insert 612 sliding upward, the elastic contact member 63 remains in the first position throughout, and does not deform the drive inclined groove 62. In contrast, during the process of the insert 612 sliding downward, it acts on the side wall 620' (the other side wall of the drive groove 62), causing the side protection 50 to rotate on its axis in the opposite direction.

[0026] When the side protection 50 is in a wide position and is subjected to external force, the insertion 612 pushes out the elastic contact member 63, rotating the elastic contact member 63 from the first position to the second position. The resulting tension allows the side protection 50 to rotate, but there is no need to adjust the position of the headrest 40.

[0027] As shown in Figures 7-8, the side protection 50 is provided with a contact block 52 protruding from it. The contact block 52 extends upward from the upper end wall of the elongated groove 62'. When the elastic contact member 63 is in the first position, it is in constant contact with the contact block 52 by elastic force. Therefore, the shape of the drive inclined groove 62 surrounded by the elastic contact member 63 together with the side wall 620' of the elongated groove 62' does not change (Figure 7).

[0028] The following explanation will be given with reference to Figure 8. The long groove 62' has a roughly fan-shaped first portion 621' and an elongated second portion 622. The width of the first portion 621' gradually widens from bottom to top. As a result, when the side protection 50 is subjected to external force interference, the side protection 50 moves relative to the backrest 30, but the width of the first portion 621' provides space for the insertion 612 to move relative to it.

[0029] The following will be explained with reference to Figures 7 to 9. The elastic contact member 63 is rotatably connected to the side protection 50, and the elastic contact member 631 contacts the convex edge 51. The assembly includes a member 632. The elastic member 632 continuously imparts momentum to the contact member 631, causing it to move from a second position to a first position. In this embodiment, the lower end of the contact member 631 is rotatably connected to the side protection 50. The elastic member 632 is a spring. The spring contacts the upper end of the contact member 631 and the convex edge 51. The elastic force of the spring causes the upper end of the contact member 631 to contact the contact block 52. As a result, the contact member 631 and the side wall 620' of the long groove 62 define a drive inclined groove 62 on which the insert 612 slides. The interaction between the insert 612 and the drive inclined groove 62 drives the side protection 50 to rotate on its axis.

[0030] Note that the elastic member 632 is not limited to a spring, and may also be a torsion spring provided at the connection point of the contact member 631 to the side protection 50.

[0031] The following explanation will be given with reference to Figures 7 to 9. The upper end of the contact member 631 is provided with a positioning block 6311 and a protrusion 6312, which extend in opposite directions. One end of the elastic member 632 is housed within the positioning block 6311, and the other end is in contact with the protrusion 51. When the contact member 631 is positioned in the first position, the protrusion 6312 comes into contact with the contact block 52.

[0032] Furthermore, an engagement block 6313 is provided on the tip side of the contact member 631. The engagement block 6313 intersects with the pivot plane of the contact member 63. A positioning member 53 corresponding to the engagement block 6313 is fixed to the side protection 50. The engagement block 6313 slides and engages with the positioning member 53.

[0033] Referring to Figures 1 to 10, the different states of the child seat 1 in this embodiment will be explained.

[0034] First, let's explain with reference to Figure 2. Figure 2 is a perspective view of the child seat of the present invention when the headrest 40 and side protection 50 are in a first state. In this state, the height of the headrest 40 is relatively low, and the width between the two side protections 50 is relatively narrow.

[0035] When the headrest 40 is slid upward, as shown in Figures 3 and 4, the headrest 40 moves along with the drive rod 611 fixed to it. As a result, the insertion 612 fixed to the end of the drive rod 611 slides upward along the chute 32 (see Figures 3 and 4).

[0036] As the insert 612 slides upward, it interacts with the side wall of the drive inclined groove 62. Specifically, the elastic member 632 applies an elastic force to the contact member 631, keeping the contact block 52 in contact with the contact member 631 throughout the process. That is, the drive inclined groove 62 maintains its shape and does not deform significantly. As shown in Figures 6 and 7, in this process, the shape of the drive inclined groove 62 is maintained and does not change significantly. As the insert 612 slides upward along the chute 32 and interacts with the contact member 631, it causes the side protection 50 to rotate outward on its axis. Therefore, the width between the two side protections 50 increases as the insert 612 slides upward. Once this adjustment is complete, the headrest 40 is adjusted to a relatively high position, and the width of the side protections 50 is also relatively wide. As shown in Figures 3 and 9, at this time, as will be explained in detail below, the insert 612 is maintained in a predetermined position, and the elastic member 632 can provide a buffer space when subjected to external forces and interference occurs.

[0037] As shown in Figure 9, when the side protection 50 of child seat 1 is in a relatively wide state, it may interfere with the side protection of other child seats or the car door. In some cases, the side protection 50 is compressed by another child seat or the car door, causing it to slide against the backrest 30 until it reaches the state shown in Figure 10. During this process, the contact member 631 rotates on its axis from a first position to a second position. The rotation of the contact member 631 compresses the elastic member 632, and the resulting tension rotates the side protection 50 inward, narrowing the width between the two side protections 50. This continues until the contact member 631 rotates to the second position and contacts the convex edge 51, reaching the state shown in Figure 10. 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 returns to its original state, and the resulting tension rotates the side protection 50 outward, returning it to the width it was before the interference.

[0038] In another embodiment, the elastic force exerted by the elastic member 632 on the contact member 631 is insufficient to slide the insert 612 upward to the preceding portion 621' of the long groove 62' and maintain the shape of the drive inclined groove 62. At this point, the contact member 631 is displaced, changing the shape of the drive inclined groove 62, thereby providing space to allow a change in the width of the side protection 50 when an external force from the inside out is applied to the side protection 50. In this embodiment, if the insert 612 is continued to slide upward along the chute 32 to the preceding portion 621' of the long groove 62', the elastic force exerted by the elastic member 632 on the contact member 631 becomes 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.

[0039] In contrast, during the process of adjusting the height of the headrest 40 from the state shown in Figure 3 to the state shown in Figure 2, the insert 612 acts on the other side wall of the drive groove 62 (i.e., the side wall 620' of the long groove 62'), and the horizontal force acting on the side wall 620' of the insert 612 can drive both side protections 50 to rotate inward on their axes, thereby narrowing the width between the two side protections 50.

[0040] Hereinafter, other embodiments of the child seat of the present invention will be described with reference to Figures 11 to 15. Figure 11 is an explanatory diagram showing the structure of another embodiment of the child seat. Figure 12 is an explanatory diagram of the structure of the drive member of Figure 11, and Figure 13 is a view of the drive member of Figure 11 from a first angle. Furthermore, Figure 14 is a view of the drive member of Figure 11 from a second angle. Figure 15 is a view of the drive member of Figure 11 from a third angle. The only difference between the child seat 1 and the embodiment described above is the side protection width adjustment mechanism 60, so below we will only explain the differences and omit redundant explanations.

[0041] First, the mechanism will be explained with reference to Figures 11 to 13. The side protection width adjustment mechanism 60 includes a drive member 61' fixed to the headrest 40, and a drive inclined groove 62 provided on the side protection 50 and slidably coupled to the drive member 61'. The drive inclined groove 62 includes a first portion 621 and a second portion 622 that exhibit a predetermined angle. Both the first portion 621 and the second portion 622 are elongated in shape and are not parallel to each other in the sliding direction of the headrest 40. As a result, when the height of the headrest 40 is adjusted, the interaction between the drive member 61' and the drive inclined groove 62 can drive the side protection 50 to rotate on its axis to adjust its width.

[0042] In this embodiment, the drive member 61' is provided with an elastic means that operates as an elastic structure, and when the side protection 50 is subjected to external force interference, the portion of the drive member 61' corresponding to the elastic means is pushed and tension is generated, thereby moving the side protection 50 The side protection 50 can be rotated inward, allowing for adjustment of its width without having to adjust the height of the headrest 40. Furthermore, when the external force interference disappears, the compressed drive member 61' returns to its original state and tension is generated, which allows the side protection 50 to be rotated outward to its relatively wide state before the interference.

[0043] This embodiment will be described below with reference to Figure 12. The drive member 61' comprises an elastic member 611' fixed to the headrest 40 and an insert 612 connected to the elastic member 611'. The elastic member 611' also comprises a fixed part 6111', a connecting part 6112', and a pusher part 6113' exhibiting an inclined structure connected between the two. The pusher part 6113' is elastic. The fixed part 6111' is engaged with and fixed to the headrest 40, and the insert 612 is provided in the connecting part 6112' so as to have a hole in it. The insert 612 is slidably connected within the drive inclined groove 62. When the side protection 50 is subjected to external force interference, the pusher part 6113' is subjected to pressure and deforms. This generates outward tension, pushing the side protection 50 inward so as to rotate on its axis.

[0044] In this embodiment, the elastic member 611' is a torsion spring made of steel wire or iron wire.

[0045] As shown in Figure 14, in this embodiment, the sliding connecting structure 70 includes a guide groove 71 provided in the backrest 30 and a guide member 72 fixed to the side protection 50. The guide member 72 and the guide groove 71 are slidably connected, and the movement of the side protection 50 is restricted 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 guide member 72 slidably connected to it in the backrest 30.

[0046] The method for adjusting the width of the side protection 50 of the child seat 1 in this embodiment is the same as in the embodiment described above, so the explanation will be omitted.

[0047] The side protection width adjustment mechanism 60 of the present invention comprises drive members 61 and 61' fixed to the headrest 40 and a drive inclined groove 62 provided in the side protection 50. The drive members 61 and 61' are slidably coupled to the drive inclined groove 62, and one of the drive members 61 and 61' or 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 and 61' and the drive inclined groove 62. Furthermore, 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, so the width of the side protection 50 can be changed without adjusting the height of the headrest 40, thereby achieving the objective of reducing interference. In addition, it is easy to use. Moreover, a child seat 1 equipped with the side protection width adjustment mechanism 60 achieves the same effect.

[0048] The structure of the other parts of the child seat 1 of the present invention is the same as that well known to those skilled in the art, so a description will be omitted. The above embodiments are merely examples for carrying out the present invention, and are not intended to limit the technical scope of the invention. Simple modifications to the present invention are also considered to fall within the technical scope of the present invention. [Industrial applicability]

[0049] The side protection width adjustment mechanism and child seat according to the present invention are useful in situations where multiple child seats are installed in the rear seat of a car, and the side protections of each child seat interfere with each other or with the car door. [Explanation of symbols]

[0050] 1 Child car seat 10 bases 20 chairs 30 Backrest 31 Convex Rib 32 shots 40 headrests 41 Operation section 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 Insert 620´ side wall 621 Part 1 621' Part 1 622 Part 2 63 Elastic contact member 631 Contact member 6311 Positioning block 6312 Convexity 6313 Engagement Block 632 Elastic members 70 Slide connecting structure 71 Guide groove 72 Guide member

Claims

1. A child seat comprising a backrest, a headrest, and two side protections provided on both the left and right sides of the backrest, wherein a side protection width adjustment mechanism is used to adjust the width between the two side protections, The adjustment mechanism is, A drive member fixedly positioned on the headrest, The system comprises an elastic structure provided between the two side protections and the backrest of the child seat, which drives the two side protections to adjust the width between them when the height of the headrest is adjusted, by the intervention of the drive member, A side protection width adjustment mechanism characterized in that, when an external force applied to the side protection is greater than the elastic force of the elastic structure, the width of the side protection is elastically adjusted by interference caused by the external force.

2. The elastic structure is an elastic structure disposed between the side protection and the main body, and is an elastic structure that provides an elastic force acting on the side protection. The headrest is height-adjustable between a first height and a second height that is higher than the first height. The adjustment mechanism is adapted to adjust the width between the two side protections such that the width decreases when the headrest of the child seat is moved to the first height position, and increases when the headrest is moved to the second height position. The adjustment mechanism according to claim 1, characterized in that the elastic structure generates tension that allows the side protections to move outward such that the width between the two side protections becomes wider when no external force is applied.

3. The adjustment mechanism according to claim 2, characterized in that the elastic structure allows movement to a state in which the width between the two side protections is narrowed without adjusting the height of the headrest when the external force is greater than the elastic force of the elastic structure.

4. The adjustment mechanism according to claim 2, characterized in that when the external force is applied, the adjustment mechanism can be moved relative to each other to change the width between the two side protections without adjusting the height of the headrest.

5. The side protection further comprises a drive inclined groove arranged therein, The drive member has an insertion that moves along the drive inclined groove between a first height position where the width between the side protections is narrowed and a second height position where the width between the side protections is widened. The adjustment mechanism according to claim 2, characterized in that when the insertion is moved between the first height position and the second height position, the external force maintains the outer shape of the drive inclined groove.

6. The adjustment mechanism according to claim 5, characterized in that the drive inclined groove extends in a direction intersecting the height adjustment direction of the headrest relative to the body of the child seat.

7. The side protection width adjustment mechanism according to claim 5, wherein the drive member includes an elastic means that acts as the elastic structure, one end of the elastic means is fixed to the headrest, and the other end of the elastic means is connected to the drive inclined groove, and when the side protection is subjected to interference, the drive member is pushed, causing the side protection to move such that the width between the two side protections narrows.

8. The side protection width adjustment mechanism according to claim 7, characterized in that the drive member comprises an elastic member constituting the elastic means, the elastic member comprises a fixed portion, a connecting portion, and a pusher portion forming an inclined structure connected between the two, the fixed portion is fixed to the headrest as one end, the connecting portion is connected to the drive inclined groove by insertion as the other end, and when the side protection is subjected to interference, the pusher portion elastically deforms in response to the interference.

9. The side protection width adjustment mechanism according to claim 5, characterized in that the side protection is provided with an elastic contact member, the elastic contact member is formed on one side wall of the drive inclined groove, and when the side protection is subjected to interference, the elastic contact member moves the side protection upon receiving the interference.

10. A child seat comprising a chair, a backrest connected to the chair, a headrest slidably connected to the backrest, and side protections provided on opposite sides of the backrest, A child seat characterized by being equipped with a side protection width adjustment mechanism as described in any one of claims 1 to 9.

11. The child seat according to claim 10, characterized in that the upper end of the side protection is slidably connected to the backrest and the lower end is pivotally supported by the backrest.

12. The child seat according to claim 11, characterized in that a guide groove is formed in either the side protection or the backrest, and a guide member is fixed to the other side protection or backrest where the guide groove is not formed, which is slidably coupled to the guide groove.

13. The child seat according to claim 10, characterized in that the headrest is provided with an operating unit, and the height of the headrest can be adjusted by the operating unit.

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