Child seat

Abstract

The utility model provides a child seat. The child seat comprises a headrest assembly and a backrest assembly. The headrest assembly is in sliding fit with the backrest assembly. The headrest assembly comprises a headrest body and a locking hook unit, the locking hook unit is rotationally connected with the headrest body through a rotating shaft, the backrest assembly is provided with a backrest pipe, the backrest pipe is provided with a plurality of adjusting hole groups which are arranged at intervals in the vertical direction, and the locking hook unit is connected with the adjusting hole groups in a matched mode so that the headrest assembly and the backrest assembly can be connected together in a locked mode; wherein the headrest body is provided with two limiting convex parts which are arranged at intervals in the axial direction of the rotating shaft, and the two limiting convex parts are located on the two opposite sides of the locking hook unit so as to clamp the locking hook unit. The use performance of the child seat is good.

Description

Technical Field

[0001] The present application relates to the technical field of child seats, and in particular to a child seat. Background Art

[0002] A child seat is a safety device designed for infants and children to provide extra protection in a car.

[0003] In the related art, a child seat includes a headrest assembly, a backrest assembly and a base. The base and the backrest assembly are fixedly connected for sitting and leaning back. The headrest assembly is arranged on the top of the backrest assembly for the head to lean on. It can be understood that for children of different heights, there will be differences in the height of their heads. Therefore, generally, the headrest assembly and the backrest assembly are both slidingly matched, that is, the headrest assembly can be moved and adjusted in the up and down directions relative to the backrest assembly. In order to lock the adjusted headrest assembly, a locking hook connected by a rotating shaft will be provided on the headrest assembly, and a plurality of adjustment holes that are locked with the locking hook will be provided on the backrest assembly. The plurality of adjustment holes are arranged at intervals in the up and down directions. The position locking between the headrest assembly and the backrest assembly is achieved by the locking cooperation between the locking hook and the adjustment holes in the corresponding position.

[0004] However, in the above-mentioned child seat, during the locking fit between the locking hook and the adjustment hole, the locking hook will be offset in the axial direction of the rotating shaft, which will reduce the locking fit efficiency between the locking hook and the adjustment hole, and further reduce the locking efficiency between the headrest assembly and the backrest assembly, making the performance of the child seat poor. Utility Model Content

[0005] This application provides a child seat that can quickly align a locking hook unit with an adjustment hole group to improve the locking efficiency between the headrest assembly and the backrest assembly. The specific technical solution is as follows:

[0006] The present application provides a child seat, comprising a headrest assembly and a backrest assembly, the headrest assembly and the backrest assembly being slidably matched; the headrest assembly comprises a headrest body and a locking hook unit, the locking hook unit and the headrest body being rotatably connected via a rotating shaft, the backrest assembly having a backrest tube, the backrest tube being provided with a plurality of adjustment hole groups arranged at intervals along the up-down direction, the locking hook unit being matched and connected with the adjustment hole groups to lock the headrest assembly and the backrest assembly together; wherein, the headrest body is provided with two limiting protrusions arranged at intervals along the axial direction of the rotating shaft, the two limiting protrusions being located on opposite sides of the locking hook unit to clamp the locking hook unit.

[0007] In this way, in the axial direction of the rotating shaft, under the clamping action of the two limiting protrusions, the locking hook unit can be positioned to avoid the position displacement of the locking hook unit in the axial direction of the rotating shaft to a certain extent. Therefore, in the process of locking and matching the headrest assembly and the backrest assembly, the locking hook unit and the adjustment hole group can be effectively aligned, thereby improving the locking and matching efficiency between the locking hook unit and the adjustment hole group; in addition, in the child seat provided in the present application, under the clamping action of the two limiting protrusions, abnormal noise caused by the displacement of the locking hook unit can be avoided to a certain extent, thereby improving the use performance of the child seat provided in the present application.

[0008] As an optional embodiment, a locking cavity is formed on the back side of the headrest body, the locking hook unit is rotatably connected to the locking cavity, and two limiting protrusions are formed on two oppositely arranged cavity side walls of the locking cavity; the limiting protrusion has a limiting surface abutting the locking hook unit, and the limiting surface has a first edge and a second edge spaced apart along the up and down directions, and the opposite ends of the first edge form guide fillets or are arranged in a circular arc shape, and the opposite ends of the second edge form guide fillets or are arranged in a circular arc shape; wherein, the length of the line between the midpoint of the first edge and the midpoint of the second edge is greater than or equal to 12 mm and less than or equal to 18 mm.

[0009] In this way, by restricting the shapes of the first edge and the second edge, the locking hook unit can be easily assembled, thereby facilitating the assembly of the entire headrest assembly.

[0010] Moreover, by limiting the size of the limiting surface, the locking hook unit can be rotated more smoothly. That is to say, during the rotation of the locking hook unit, the positive projection of the structure cooperating with the limiting surface on the limiting surface can fall exactly within the limiting surface. In this way, the locking hook unit can be prevented from interfering with the edge of the limiting surface and getting stuck during the rotation to a certain extent, thereby improving the locking and unlocking efficiency between the locking hook unit and the adjustment hole group.

[0011] As an optional embodiment, the cavity opening of the locking cavity is arranged to face rearward, and the size of the limiting protrusion in the vertical direction gradually decreases from the cavity bottom wall of the locking cavity to the cavity opening of the locking cavity.

[0012] In this way, less raw materials are required to form the limiting protrusion, which can reduce costs.

[0013] As an optional embodiment, two locking hook units arranged at intervals are provided on the headrest body, and the backrest assembly includes two backrest tubes arranged at intervals, and the two backrest tubes are arranged in a one-to-one correspondence with the two locking hook units; wherein, the locking hook unit includes two locking hooks connected together, and the adjustment hole group includes two adjustment holes arranged at intervals, and one locking hook corresponds to one adjustment hole.

[0014] As an optional embodiment, the child seat provided in the present application also includes a headrest adjustment member, which is slidably matched with the headrest body, and the bottom end of the headrest adjustment member forms two spaced apart driving parts, and the two driving parts are arranged in a one-to-one correspondence with the two locking hook units; the locking hook includes a driving protrusion, a rotating part and a locking part connected in sequence, and the driving part is provided with a driving groove for the driving protrusion to extend into, and the rotating part is rotatably connected to the headrest body; wherein, the top of the headrest adjustment member is used to move downward when subjected to external force, drive the locking part to move into the adjustment hole, and cooperate with the adjustment hole; or, the top of the headrest adjustment member is used to move upward when subjected to external force, drive the locking part to move out of the adjustment hole, and disengage from the adjustment hole.

[0015] As an optional embodiment, a reset member is provided between the headrest adjusting member and the headrest body, and the reset member is used to apply elastic force to the headrest adjusting member so that the top of the headrest adjusting member moves upward and resets when subjected to external force.

[0016] In this way, under the elastic force of the reset member, the locking hook and the adjustment hole can be quickly disengaged and unlocked, and the headrest adjustment member can be effectively reset, so that the headrest adjustment member can be pressed down later to achieve the locking fit between the locking hook and the adjustment hole.

[0017] As an optional embodiment, the reset member is a spring, and the headrest adjustment member is provided with a limiting column, one end of the spring is sleeved on the limiting column and connected to the headrest adjustment member; a limiting rib protruding forward is provided on the headrest body, and the other end of the spring is connected to the limiting rib; wherein the protruding height of the limiting rib is greater than the outer diameter of the spring.

[0018] In this way, during the deformation of the spring, it can to a certain extent avoid the spring from colliding with the pull rod or the pillow part to produce abnormal noise, and the spring will not fall out, ensuring the stability and reliability of the spring. Therefore, the noise of operating the headrest adjustment part can be reduced, further improving the use experience and performance of the child seat provided by this application.

[0019] As an optional embodiment, the headrest adjustment member includes an operating handle and two pull rods, the two pull rods are connected to the lower end of the operating handle and are arranged at intervals, and the bottom ends of the pull rods form a driving part; two track grooves are formed on the headrest body, and the two track grooves are arranged one-to-one corresponding to the two pull rods, and the track groove includes a first groove section and a second groove section that are angled to each other; wherein, two first reinforcing protrusions are provided on the back side of the headrest body, and the two first reinforcing protrusions are arranged one-to-one corresponding to the two track grooves, and the first reinforcing protrusions are provided at the intersection of the first groove section and the second groove section of the corresponding track groove.

[0020] In this way, the structural strength of the groove of the pillow portion can be improved, thereby improving the structural strength of the headrest assembly.

[0021] As an optional embodiment, two groups of reinforcing ribs arranged at intervals are provided on the back side of the headrest body, one group of reinforcing ribs corresponds to a first reinforcing protrusion, and the reinforcing ribs are located below the first reinforcing protrusion; wherein, each group of reinforcing ribs includes a plurality of reinforcing ribs arranged at intervals along the up and down directions, the longitudinal cross-section of the reinforcing ribs is triangular, and the thickness of the reinforcing ribs is greater than or equal to 1.5 mm and less than or equal to 3.0 mm.

[0022] In this way, the structural strength of the pillow portion is increased, thereby increasing the service life of the child seat provided in this application.

[0023] As an optional embodiment, the headrest body has a recessed portion recessed backward; the recessed portion has two outer side walls arranged back to back, and a protruding second reinforcing protrusion is provided on the outer side walls, and the protruding height of the second reinforcing protrusion is greater than or equal to 0.5 mm.

[0024] In this way, the structural strength of both sides of the recessed portion can be increased, thereby increasing the structural strength of the headrest assembly and improving the service life of the child seat provided by the present application.

[0025] In the child seat provided by the present application, since two limiting protrusions are arranged at intervals along the axial direction of the rotating shaft on the headrest body, and the two limiting protrusions clamp the locking hook unit, that is, in the axial direction of the rotating shaft, the position of the locking hook unit can be limited by the clamping action of the two limiting protrusions, so as to avoid the position displacement of the locking hook unit in the axial direction of the rotating shaft to a certain extent, thereby, in the process of locking and matching the headrest assembly and the backrest assembly, the locking hook unit and the adjustment hole group can be effectively aligned, thereby improving the locking and matching efficiency between the locking hook unit and the adjustment hole group; in addition, in the child seat provided by this embodiment, under the clamping action of the two limiting protrusions, abnormal noise caused by the displacement of the locking hook unit can be avoided to a certain extent, thereby improving the use performance of the child seat provided by this embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a child seat provided in an embodiment of the present application;

[0027] Figure 2 An exploded view of a child seat provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the three-dimensional structure of a headrest assembly in a child seat provided in an embodiment of the present application;

[0029] Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point A in the middle;

[0030] Figure 5 A schematic diagram of a three-dimensional structure in which a backrest assembly and a base are connected together in a child seat provided in an embodiment of the present application;

[0031] Figure 6 for Figure 5 A magnified schematic diagram of the local structure at point B in the middle;

[0032] Figure 7 A schematic diagram of the three-dimensional structure of the headrest body in the child seat provided in an embodiment of the present application;

[0033] Figure 8 for Figure 7 A magnified schematic diagram of the local structure at point C in the middle;

[0034] Figure 9 A schematic plan view of the headrest assembly in a child seat provided in an embodiment of the present application;

[0035] Figure 10 for Figure 9 Cross-sectional view along DD direction;

[0036] Figure 11 for Figure 9 A cross-sectional view of the headrest assembly along the EE direction in one state;

[0037] Figure 12 for Figure 9 A sectional view of the headrest assembly along the EE direction in another state;

[0038] Figure 13 A schematic diagram of the three-dimensional structure of a headrest adjustment member in a child seat provided in an embodiment of the present application;

[0039] Figure 14 A schematic diagram of the three-dimensional structure of a locking hook in a child seat provided in an embodiment of the present application;

[0040] Figure 15 A schematic structural diagram of a headrest assembly in a child seat provided in an embodiment of the present application from another perspective;

[0041] Figure 16 for Figure 15 Structural diagram of the partial structure of the structure shown.

[0042] Description of reference numerals:

[0043] 1. Headrest assembly; 2. Backrest assembly; 3. Base; 4. Headrest adjustment member; 5. Reset member;

[0044] 10. Child seat; 11. Headrest body; 12. Locking hook unit; 13. Positioning protrusion; 14. Fixing block; 15. Buffer; 21. Backrest tube; 41. Driving unit; 42. Operating handle; 43. Pull rod; 44. Positioning column;

[0045] 111, pivot hole; 112, pillow portion; 113, locking extension; 114, limiting rib; 115, guide protrusion; 116, first reinforcing protrusion; 117, reinforcing rib; 118, diamond-shaped protrusion; 119, recessed portion; 121, locking hook; 131, limiting surface; 141, adapter; 211, adjustment hole group; 411, drive slot; 431, limiting slot;

[0046] 1121. Track groove; 1122. First groove section; 1123. Second groove section; 1124. Guide hole; 1131. Locking cavity; 1191. Outer side wall; 1192. Second reinforcing protrusion; 1211. Driving protrusion; 1212. Rotating portion; 1213. Locking portion; 1311. First edge; 1312. Second edge; 2111. Adjustment hole. DETAILED DESCRIPTION

[0047] The following will clearly and thoroughly describe the technical solutions in this application in conjunction with the accompanying drawings. In the description of the embodiments of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more than two.

[0048] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0049] In the related art, a child seat includes a headrest assembly, a backrest assembly and a base. The base and the backrest assembly are fixedly connected for sitting and leaning back. The headrest assembly is arranged on the top of the backrest assembly for the head to lean on. It can be understood that for children of different heights, there will be differences in the height of their heads. Therefore, generally, the headrest assembly and the backrest assembly are both slidingly matched, that is, the headrest assembly can be moved and adjusted in the up and down directions relative to the backrest assembly. In order to lock the adjusted headrest assembly, a locking hook connected by a rotating shaft will be provided on the headrest assembly, and a plurality of adjustment holes that are locked with the locking hook will be provided on the backrest assembly. The plurality of adjustment holes are arranged at intervals in the up and down directions. The position locking between the headrest assembly and the backrest assembly is achieved by the locking cooperation between the locking hook and the adjustment holes in the corresponding position.

[0050] However, in the above-mentioned child seat, during the process of locking the locking hook and the adjusting hole, the locking hook will be offset in the axial direction of the rotating shaft, which will make it difficult to align the locking hook and the adjusting hole, thereby reducing the locking efficiency between the locking hook and the adjusting hole, and further reducing the locking efficiency between the headrest assembly and the backrest assembly, making the performance of the child seat poor; in addition, during the use of the child seat, even if the locking hook and the adjusting hole have been locked and matched, the locking hook may also be offset in the axial direction of the rotating shaft at this time, at this time, abnormal noise will be generated, which will also affect the performance of the child seat.

[0051] Therefore, the embodiment of the present application provides a child seat, which can avoid the displacement of the locking hook unit to a certain extent during the locking process of the locking hook unit and the adjustment hole group. In this way, the locking coordination efficiency between the locking hook unit and the adjustment hole group can be improved, and the locking efficiency between the headrest assembly and the backrest assembly can be improved, so that the child seat provided by this embodiment has better performance.

[0052] The child seat provided in the embodiment of the present application will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0053] Please combine Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the three-dimensional structure of the child seat provided in an embodiment of the present application. Figure 2 This is an exploded view of a child seat provided in an embodiment of the present application. As shown, this embodiment provides a child seat 10 comprising a headrest assembly 1, a backrest assembly 2, and a base 3. The headrest assembly 1 is disposed on top of the backrest assembly 2 and slidably engages with the backrest assembly 2, allowing the headrest assembly 1 to be adjusted vertically. The headrest assembly 1 is used to support the child's head; the backrest assembly 2 is used to support the child's back; and the base 3 is disposed at the bottom of the backrest assembly 2 for the child to sit on.

[0054] It is understandable that after the position of the headrest assembly 1 is adjusted, the position of the headrest assembly 1 needs to be fixed there, and thus the headrest assembly 1 and the backrest assembly 2 need to be locked together.

[0055] Therefore, please combine Figures 3 to 6 , Figure 3 This is a schematic diagram of the three-dimensional structure of the headrest assembly in the child seat provided in an embodiment of the present application. Figure 4 for Figure 3 A schematic diagram of the enlarged local structure at point A. Figure 5 This is a schematic diagram of a three-dimensional structure in which a backrest assembly and a base are connected together in a child seat provided in an embodiment of the present application. Figure 6 for Figure 5 An enlarged schematic diagram of the partial structure at point B in the middle. In this embodiment, the headrest assembly 1 includes a headrest body 11 and a locking hook unit 12 rotatably connected to the headrest body 11. Specifically, a pivot hole 111 is defined in the headrest body 11. A rotating shaft (not shown in the figure) passes through the pivot hole 111 and the locking hook unit 12 to rotatably connect the locking hook unit 12 to the headrest body 11. The backrest assembly 2 includes a backrest tube 21 having a plurality of adjustment hole groups 211 spaced apart in the vertical direction. The locking hook unit 12 cooperates with the adjustment hole groups 211 to lock the headrest assembly 1 and the backrest assembly 2 together.

[0056] In order to solve the problem in the related art that the locking hook and the adjustment hole are difficult to align during the locking cooperation of the headrest assembly and the backrest assembly, in the present embodiment, two limiting protrusions 13 are provided on the headrest body 11, and the two limiting protrusions 13 are located on opposite sides of the locking hook unit 12 to clamp the locking hook unit 12, wherein the arrangement direction of the two limiting protrusions 13 is consistent with the axial direction of the rotating shaft, that is, the rotating shaft passes through one limiting protrusion 13, the locking hook unit 12 and the other limiting protrusion 13 in sequence, and then the locking hook unit 12 is rotatably connected with the headrest body 11. In this way, in the axial direction of the rotating shaft, under the clamping action of the two limiting protrusions 13, the locking hook unit 12 can be positioned to avoid the position displacement of the locking hook unit 12 in the axial direction of the rotating shaft to a certain extent, so that in the process of locking and matching the headrest assembly 1 and the backrest assembly 2, the locking hook unit 12 and the adjustment hole group 211 can be effectively aligned, thereby improving the locking and matching efficiency between the locking hook unit 12 and the adjustment hole group 211; in addition, in the child seat 10 provided in this embodiment, under the clamping action of the two limiting protrusions 13, it is possible to avoid abnormal noise caused by the displacement of the locking hook unit 12 to a certain extent, thereby improving the use performance of the child seat 10 provided in this embodiment.

[0057] It should be noted that the above-mentioned backrest tube 21 is also provided with a slide groove (not shown in the figure) that slides with the headrest assembly 1. In this way, in the process of adjusting the position of the headrest assembly 1 up and down, it can play a certain guiding role and improve the stability of the headrest assembly 1 during the up and down movement, thereby improving the performance of the child seat 10 provided in this embodiment.

[0058] Specifically, in this embodiment, in order to realize the rotational connection between the locking hook unit 12 and the headrest body 11, the headrest body 11 includes a pillow portion 112 and two locking extensions 113 connected to the lower end of the pillow portion 112. The two locking extensions 113 are arranged at intervals along the width direction of the child seat 10 and extend downward. A locking hook unit 12 is rotatably connected to a locking extension 113. That is to say, in this embodiment, there are two locking hook units 12, which are arranged at intervals along the width direction of the child seat 10.

[0059] The width direction of the child seat 10 is Figures 1 to 3 、 Figure 5 The yy-axis direction is consistent.

[0060] Please combine Figure 7 and Figure 8 , Figure 7 This is a schematic diagram of the three-dimensional structure of the headrest body in the child seat provided in an embodiment of the present application. Figure 8 for Figure 7 An enlarged schematic diagram of the partial structure at point C in the middle. In some embodiments, a locking cavity 1131 is formed on the back side of the locking extension 113, and the locking hook unit 12 is rotatably connected to the locking cavity 1131. Two limiting protrusions 13 are formed on two oppositely disposed side walls of the locking cavity 1131, both of which are penetrated by the pivot hole 111. The limiting protrusions 13 have limiting surfaces 131 that abut the locking hook unit 12. The limiting surfaces 131 have first edges 1311 and second edges 1312 spaced apart in the vertical direction. The first edges 1311 have guide fillets or arc-shaped configurations at opposite ends, and the second edges 1312 have guide fillets or arc-shaped configurations at opposite ends.

[0061] In this way, by restricting the shapes of the first edge 1311 and the second edge 1312 , the locking hook unit 12 can be easily assembled, thereby facilitating the assembly of the entire headrest assembly 1 .

[0062] The length of the line connecting the midpoint of the first edge 1311 and the midpoint of the second edge 1312 is greater than or equal to 12 mm and less than or equal to 18 mm. By limiting the size of the limiting surface 131, the locking hook unit 12 can rotate more smoothly. In other words, during the rotation of the locking hook unit 12, the orthographic projection of the structure cooperating with the limiting surface 131 on the limiting surface 131 can fall exactly within the limiting surface 131. This can, to a certain extent, prevent the locking hook unit 12 from interfering with the edge of the limiting surface 131 during rotation, thereby improving the efficiency of locking and unlocking between the locking hook unit 12 and the adjustment hole group 211.

[0063] For example, the length of the line connecting the midpoint of the first edge 1311 and the midpoint of the second edge 1312 can be 12 mm, 13.0 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, etc. In a specific implementation of this embodiment, the length of the line connecting the midpoint of the first edge 1311 and the midpoint of the second edge 1312 is 14.5 mm. It should be noted that in other implementations, as long as the length of the line connecting the midpoint of the first edge 1311 and the midpoint of the second edge 1312 is greater than or equal to 12 mm and less than or equal to 18 mm, the purpose of this embodiment can be achieved. Here, the length of the line connecting the midpoint of the first edge 1311 and the midpoint of the second edge 1312 is not specifically limited.

[0064] In this embodiment, the opening of the locking cavity 1131 is positioned rearward. To reduce the cost of forming the limiting protrusion 13, in some optional embodiments, the size of the limiting protrusion 13 gradually decreases in the vertical direction from the bottom wall of the locking cavity 1131 to the opening of the locking cavity 1131. This reduces the raw materials required to form the limiting protrusion 13, thereby reducing costs.

[0065] When two locking hook units 12 are arranged at intervals along the width of the child seat 10, two backrest tubes 21 should also be provided, with the two backrest tubes 21 corresponding to the two locking hook units 12. The locking hook unit 12 includes two connected locking hooks 121, and the adjustment hole group 211 includes two adjustment holes 2111 arranged at intervals, with one locking hook 121 corresponding to one adjustment hole 2111. The two locking hooks 121 in the locking hook unit 12 are arranged at intervals along the width of the child seat 10, and the two adjustment holes 2111 in the adjustment hole group 211 are arranged at intervals along the width of the child seat 10.

[0066] Here, it should be noted that the two locking hooks 121 rotate together, that is, the two locking hooks 121 and the two adjustment holes 2111 are locked or released at the same time.

[0067] In this embodiment, the plurality of adjustment hole groups 211 may be arranged evenly or unevenly, which is determined according to the actual design requirements of the child seat 10 and is not limited here.

[0068] The shape of the adjustment hole 2111 is rectangular. In other embodiments, the shape of the adjustment hole 2111 can also be square or other shapes. Here, there is no limitation on the shape of the adjustment hole 2111.

[0069] Since the two locking hooks 121 in a locking hook unit 12 are arranged at intervals, corresponding structural parts need to be set to separate the two locking hooks 121. Thus, in a specific implementation of this embodiment, a fixed block 14 is also connected to the locking cavity 1131, and a downwardly extending adapter portion 141 is formed at the bottom end of the fixed block 14. The adapter portion 141 is arranged between the two locking hooks 121. That is to say, the rotating shaft needs to pass through a cavity side wall of the locking cavity 1131, a locking hook 121, the adapter portion 141, the other locking hook 121 and the other cavity side wall of the locking cavity 1131 in sequence before the locking hook unit 12 can be rotatably connected with the locking extension portion 113.

[0070] It should be noted that the connection method between the fixing block 14 and the cavity wall of the locking cavity 1131 can be bonding. Here, there is no specific limitation on the connection method between the fixing block 14 and the cavity wall of the locking cavity 1131.

[0071] Because the headrest assembly 1 is used to support a child's head, the portion of the headrest assembly 1 that contacts the head should be flexible. In some embodiments, a cushioning member 15 is bonded to the front side of the headrest body 11. The shape of the cushioning member 15 matches the shape of the headrest body 11. Specifically, the cushioning member 15 can be made of foam and / or memory foam. The material of the cushioning member 15 is not specifically limited.

[0072] Please combine Figure 9 and Figure 12 , Figure 9 This is a schematic plan view of the headrest assembly in the child seat provided in an embodiment of the present application. Figure 10 for Figure 9 Cross-sectional view along DD direction, Figure 11 for Figure 9 A cross-sectional view of the headrest assembly in one state along the EE direction, Figure 12 for Figure 9A cross-sectional view of the headrest assembly along the EE direction in another state is shown. In order to achieve locking or unlocking between the locking hook 121 and the adjustment hole 2111, that is, to achieve locking engagement between the locking hook 121 and the adjustment hole 2111 or to achieve disengagement between the locking hook 121 and the adjustment hole 2111, a related driving member is required. Specifically, the child seat 10 provided in this embodiment further includes a headrest adjustment member 4 that is slidably engaged with the headrest body 11.

[0073] Please continue to combine Figure 13 and Figure 14 , Figure 13 This is a schematic diagram of the three-dimensional structure of the headrest adjustment member in the child seat provided in an embodiment of the present application. Figure 14 This is a schematic diagram of the three-dimensional structure of the locking hook in the child seat provided in the embodiment of the present application. As shown in the figure, in a specific implementation of this embodiment, the bottom end of the headrest adjustment member 4 forms two spaced apart drive parts 41, and the two drive parts 41 are arranged in a one-to-one correspondence with the two locking hook units 12; the locking hook 121 includes a driving protrusion 1211, a rotating part 1212 and a locking part 1213 connected in sequence, and a driving groove 411 is provided on the driving part 41 for the driving protrusion 1211 to extend into, and the rotating part 1212 is rotatably connected to the headrest body 11; wherein, the top of the headrest adjustment member 4 is used to move downward when subjected to external force, driving the locking part 1213 to move into the adjustment hole 2111 and cooperate with the adjustment hole 2111, which can be seen in FIG. Figure 10 and Figure 11 Or, the top of the headrest adjustment member 4 is used to move upward when subjected to external force, driving the locking portion 1213 to move outside the adjustment hole 2111 and disengage from the adjustment hole 2111, see Figure 12 .

[0074] It should be noted that the two locking hooks 121 in a locking hook unit 12 are movably engaged with a driving slot 411 .

[0075] Furthermore, the headrest adjustment member 4 includes an operating handle 42 and two pull rods 43. The operating handle 42 is for the user to operate with his hand to press the headrest adjustment member 4 downward to achieve the locking fit between the locking hook 121 and the adjustment hole 2111, or to pull the headrest adjustment member 4 upward to achieve the disengagement of the locking hook 121 from the adjustment hole 2111. The two pull rods 43 are connected to the lower end of the operating handle 42 and are arranged at intervals, and the bottom end of the pull rod 43 forms the driving part 41.

[0076] It is understandable that simply lifting the headrest adjustment member 4 would make it difficult to reset the headrest adjustment member 4. Therefore, in some specific embodiments, a reset member 5 is provided between the headrest adjustment member 4 and the headrest body 11. The reset member 5 is used to apply an elastic force to the headrest adjustment member 4 so that the top of the headrest adjustment member 4 moves upward and resets when subjected to an external force. In this way, under the elastic force of the reset member 5, the locking hook 121 and the adjustment hole 2111 can be quickly disengaged and unlocked, and the headrest adjustment member 4 can be effectively reset, so that the headrest adjustment member 4 can be subsequently pressed down to achieve a locked fit between the locking hook 121 and the adjustment hole 2111.

[0077] In some optional embodiments, the reset member 5 may be a spring, and a pull rod 43 is provided with a limiting post 44. One end of the spring is sleeved on the limiting post 44 and connected to the headrest adjustment member 4. The headrest portion 112 is provided with a forward-projecting limiting rib 114, and the other end of the spring is connected to the limiting rib 114. It should be noted that the space for accommodating the spring is formed by the pull rod 43 and the headrest portion 112.

[0078] The protruding height of the limiting rib 114 is greater than the outer diameter of the spring. This prevents the spring from colliding with the pull rod 43 or the headrest portion 112 and generating abnormal noise during spring deformation, and prevents the spring from falling out, thereby ensuring the stability and reliability of the spring. This reduces noise during operation of the headrest adjustment member 4, further enhancing the user experience and performance of the child seat 10 provided by this embodiment.

[0079] Please combine Figure 15 and Figure 16 , Figure 15 This is a structural diagram of the headrest assembly in the child seat provided by an embodiment of the present application from another perspective. Figure 16 for Figure 15 A schematic diagram of a partial structure of the structure shown. Whether the headrest adjustment member 4 is pressed down or reset, its movement stroke is also a certain distance. Therefore, in some embodiments, in order to limit the movement stroke of the headrest adjustment member 4, each pull rod 43 is provided with a corresponding limiting groove 431, which extends in the vertical direction and is a strip-shaped groove. Correspondingly, the pillow portion 112 is provided with a guide protrusion 115 that slides with the limiting groove 431 in the vertical direction. When the locking hook 121 is locked with the adjustment hole 2111, the guide protrusion 115 abuts against the top of the limiting groove 431. When the locking hook 121 is disengaged from the adjustment hole 2111 and released, the guide protrusion 115 abuts against the bottom of the limiting groove 431.

[0080] In order to improve the stability of the headrest adjustment member 4 during the sliding process, two track grooves 1121 are formed on the pillow portion 112. The two track grooves 1121 are arranged in a one-to-one correspondence with the two pull rods 43. The track groove 1121 includes a first groove section 1122 and a second groove section 1123 that are angled to each other, wherein the first groove section 1122 is located above the second groove section 1123, and the first groove section 1122 extends in an inclined direction, the second groove section 1123 extends in an up and down direction, and the top ends of the two first groove sections 1122 are connected together, forming an "eight" shape after connection. The above-mentioned limiting rib 114 is arranged in the second groove section 1123, and the guide protrusion 115 is arranged at the intersection of the first groove section 1122 and the second groove section 1123.

[0081] It is understandable that when the track groove 1121 is opened on the pillow portion 112, the structural strength of the pillow portion 112 will be weakened, and the structural strength of the headrest body 11 as a whole will be weakened. Figure 3 and Figure 7 Two first reinforcing protrusions 116 are provided on the back side of the pillow portion 112. The two first reinforcing protrusions 116 correspond one-to-one with the two track grooves 1121, and the first reinforcing protrusions 116 are located at the intersection of the first groove section 1122 and the second groove section 1123 of the corresponding track groove 1121. This improves the structural strength of the grooved portion of the pillow portion 112, thereby improving the structural strength of the headrest assembly 1.

[0082] Furthermore, two sets of spaced-apart reinforcing ribs 117 can be provided on the back of the headrest portion 112. One set of reinforcing ribs 117 corresponds to one first reinforcing protrusion 116, and the reinforcing ribs 117 are located below the first reinforcing protrusion 116. Each set of reinforcing ribs 117 includes multiple reinforcing ribs 117 spaced-apart in the vertical direction. The longitudinal cross-section of the reinforcing ribs 117 is triangular, and the thickness of the reinforcing ribs 117 is greater than or equal to 1.5 mm and less than or equal to 3.0 mm. This provides a higher structural strength for the headrest portion 112, thereby increasing the service life of the child seat 10 provided in this embodiment.

[0083] For example, the thickness of the reinforcing rib 117 can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3.0 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, etc. In a specific embodiment of this embodiment, the thickness of the reinforcing rib 117 is 1.75 mm. It should be noted that in other embodiments, as long as the thickness of the reinforcing rib 117 meets the above-mentioned requirement of being greater than or equal to 1.5 mm and less than or equal to 3.0 mm, the purpose of this embodiment can be achieved. The thickness of the reinforcing rib 117 is not specifically limited.

[0084] like Figure 15 and Figure 16 As shown, in order to improve the structural strength of the headrest assembly 1, a reinforcement structure can also be provided on the front of the pillow portion 112 to improve the structural strength of the headrest assembly 1. Specifically, the reinforcement structure provided on the front of the pillow portion 112 can be a reinforcement structure formed by connecting multiple diamond-shaped ribs 118.

[0085] like Figure 3 and Figure 7 As shown, it is understood that in order to improve the comfort of the pillow portion 112, the middle portion of the pillow portion 112 needs to be recessed backward to effectively fit the child's head. Therefore, a recessed portion 119 is formed in the middle portion of the pillow portion 112. The recessed portion 119 has two outer walls 1191 arranged in opposite directions. The outer walls 1191 are provided with a protruding second reinforcing protrusion 1192. The protruding height of the second reinforcing protrusion 1192 is greater than or equal to 0.5 mm. This can increase the structural strength of the two sides of the recessed portion 119, thereby increasing the structural strength of the headrest assembly 1, and improving the service life of the child seat 10 provided by this embodiment.

[0086] It is understood that when the child seat 10 provided in this embodiment is used in a car, it is necessary to secure the child seat 10 to the car seat using the vehicle's seat belt. Therefore, guide holes 1124 for the seat belts to pass through are provided on both sides of the headrest portion 112 along the width direction of the child seat 10. In this way, the seat belts can pass through the guide holes 1124 to secure the child seat 10 to the car seat.

[0087] The above content is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A child seat, characterized in that: It includes a headrest assembly and a backrest assembly, wherein the headrest assembly and the backrest assembly are slidably matched; The headrest assembly includes a headrest body and a locking hook unit, the locking hook unit is rotatably connected to the headrest body via a rotating shaft, the backrest assembly includes a backrest tube, the backrest tube is provided with a plurality of adjustment holes arranged at intervals in the vertical direction, the locking hook unit is engaged with the adjustment hole groups to lock the headrest assembly and the backrest assembly together; Wherein, the headrest body is provided with two limiting protrusions spaced apart along the axial direction of the rotating shaft, and the two limiting protrusions are located on opposite sides of the locking hook unit to clamp the locking hook unit.

2. The child seat according to claim 1, characterized in that A locking cavity is formed on the back side of the headrest body, the locking hook unit is rotatably connected to the locking cavity, and the two limiting protrusions are formed on two opposite side walls of the locking cavity; The limiting protrusion has a limiting surface that abuts against the locking hook unit, and the limiting surface has a first edge and a second edge spaced apart in the up-down direction, wherein opposite ends of the first edge are formed with guide fillets or are arranged in an arc shape, and opposite ends of the second edge are formed with guide fillets or are arranged in an arc shape; Wherein, the length of the line connecting the midpoint of the first edge and the midpoint of the second edge is greater than or equal to 12 mm and less than or equal to 18 mm.

3. The child seat according to claim 2, characterized in that The cavity opening of the locking cavity is arranged toward the rear, and the size of the limiting protrusion in the vertical direction gradually decreases in the direction from the cavity bottom wall of the locking cavity to the cavity opening of the locking cavity.

4. The child seat according to claim 1, characterized in that The headrest body is provided with two locking hook units arranged at intervals, and the backrest assembly includes two backrest tubes arranged at intervals, and the two backrest tubes are provided in a one-to-one correspondence with the two locking hook units; Wherein, the locking hook unit includes two locking hooks connected together, the adjustment hole group includes two adjustment holes arranged at intervals, and one locking hook corresponds to one adjustment hole.

5. The child seat according to claim 4, characterized in that The headrest adjusting member is further provided, wherein the headrest adjusting member is slidably engaged with the headrest body, and the bottom end of the headrest adjusting member is formed with two spaced apart driving parts, and the two driving parts are provided in a one-to-one correspondence with the two locking hook units; The locking hook includes a driving protrusion, a rotating portion and a locking portion connected in sequence, the driving portion is provided with a driving slot for the driving protrusion to extend into, and the rotating portion is rotatably connected to the headrest body; The top of the headrest adjustment member is used to move downward when subjected to external force, driving the locking portion to move into the adjustment hole and to cooperate with the adjustment hole; or, the top of the headrest adjustment member is used to move upward when subjected to external force, driving the locking portion to move out of the adjustment hole and to disengage from the adjustment hole.

6. The child seat according to claim 5, characterized in that A reset member is provided between the headrest adjusting member and the headrest body, and the reset member is used to apply elastic force to the headrest adjusting member so that the top of the headrest adjusting member moves upward and resets when subjected to external force.

7. The child seat according to claim 6, characterized in that The reset member is a spring, the headrest adjustment member is provided with a limiting post, one end of the spring is sleeved on the limiting post and connected to the headrest adjustment member; The headrest body is provided with a limiting rib protruding forward, and the other end of the spring is connected to the limiting rib; Wherein, the protruding height of the limiting rib is greater than the outer diameter of the spring.

8. The child seat according to any one of claims 5 to 7, characterized in that The headrest adjustment member includes an operating handle and two pull rods, the two pull rods are connected to the lower end of the operating handle and are spaced apart, and the bottom ends of the pull rods form the driving part; Two track grooves are formed on the headrest body, and the two track grooves are arranged in a one-to-one correspondence with the two pull rods, and the track grooves include a first groove section and a second groove section that are angled with each other; Wherein, two first reinforcing protrusions are provided on the back side of the headrest body, the two first reinforcing protrusions are provided in one-to-one correspondence with the two track grooves, and the first reinforcing protrusions are provided at the intersection of the first groove section and the second groove section of the corresponding track groove.

9. The child seat according to claim 8, characterized in that Two groups of spaced-apart reinforcing ribs are provided on the back side of the headrest body, one group of reinforcing ribs corresponds to one first reinforcing convex portion, and the reinforcing ribs are located below the first reinforcing convex portion; Each group of reinforcing ribs includes a plurality of reinforcing ribs spaced apart in the up-down direction, the longitudinal cross-section of the reinforcing ribs is triangular, and the thickness of the reinforcing ribs is greater than or equal to 1.5 mm and less than or equal to 3.0 mm.

10. The child seat according to any one of claims 1 to 7, characterized in that The headrest body has a recessed portion recessed backwards; The recessed portion has two outer side walls disposed opposite to each other, and a protruding second reinforcing protrusion is provided on the outer side wall. The protruding height of the second reinforcing protrusion is greater than or equal to 0.5 mm.

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