Walking wheel arrangement and child seat

Abstract

The application discloses a walking wheel device and a child seat. The child seat comprises a seat body and a walking wheel assembly. The bottom of the seat body is provided with a plug-in hole, and the hole wall of the plug-in hole is provided with a clamping hole. The walking wheel assembly is arranged on the bottom of the seat body, and comprises a wheel seat. The wheel seat is provided with a plug-in part and an elastic convex part. The plug-in part is plugged into the plug-in hole, and the side of the plug-in part facing the hole wall of the plug-in hole is connected with the elastic convex part. The elastic convex part is clamped into the clamping hole, and a reinforcing part is arranged between the fixed end and the plug-in part. During movement of the child seat, the elastic convex part is easily stressed under vibration, and is easily broken with the plug-in part under vibration impact. Through arrangement of the reinforcing part, the connection between the elastic convex part and the plug-in part is reinforced, the possibility of breakage of the elastic convex part is reduced, and the reliability of the connection between the wheel seat and the seat body is improved.

Description

Technical Field

[0001] This application relates to children's tools, specifically to a walking wheel device and a child seat. Background Technology

[0002] When a child is seated in a child car seat, it may be necessary to move the seat in some situations. During this process, the combined weight of the child and the seat makes moving difficult. The seat is equipped with casters at the bottom to reduce resistance by pushing the seat forward. Currently, the problem is that the casters can easily become stuck and fail to engage properly during seat movement. Utility Model Content

[0003] In view of the above problems, this application provides a walking wheel device and a child seat. By providing a reinforcing part on the snap-fit ​​structure of the wheel seat, the strength of the snap-fit ​​structure can be improved, the possibility of the snap-fit ​​structure breaking due to excessive force can be reduced, and the reliability of the connection can be improved.

[0004] The first aspect of this application provides a child car seat, comprising: The seat body has a connector hole at the bottom, and the wall of the connector hole has a snap-fit ​​hole. The wheel assembly is located at the bottom of the seat body. The wheel assembly includes a wheel seat, which has a plug-in part and an elastic protrusion. The plug-in part is plugged into a plug-in hole. The side of the plug-in part facing the hole wall of the plug-in hole is connected to the elastic protrusion. The elastic protrusion is engaged with a snap-fit ​​hole. A reinforcing part is provided between the elastic protrusion and the plug-in part.

[0005] During the movement of a child seat, the elastic protrusion is easily subjected to stress under vibration, and is prone to breakage from the connecting part under vibration and impact. By adding a reinforcement, the connection between the elastic protrusion and the connecting part can be strengthened, reducing the possibility of breakage of the elastic protrusion and improving the reliability of the connection between the wheel seat and the seat body.

[0006] In some embodiments of this application, the elastic protrusion includes a free end and a fixed end. The fixed end is connected to the insertion part, and a reinforcing part is provided between the fixed end and the insertion part. Along the radial direction of the insertion hole, the free end protrudes from the fixed end, and the free end is engaged with the locking hole under the elastic force of the elastic protrusion.

[0007] In some embodiments of this application, the side of the plug-in portion facing the plug-in hole is provided with a receiving cavity, the fixed end is disposed in the receiving cavity, and a reinforcing portion is provided between the fixed end and part of the wall of the receiving cavity.

[0008] In some embodiments of this application, there are multiple reinforcing parts, which are spaced apart within the receiving cavity along the circumferential direction of the insertion hole.

[0009] In some embodiments of this application, a first positioning structure is provided at the end of the insertion hole facing the wheel seat, and a second positioning structure is provided on the side of the insertion part facing the hole wall of the insertion hole. The first positioning structure and the second positioning structure are positioned and engaged along the circumferential direction of the insertion hole. One of the first positioning structure and the second positioning structure is a positioning groove, and the other of the first positioning structure and the second positioning structure is a positioning protrusion.

[0010] In some embodiments of this application, the first positioning structure is a positioning groove. Specifically, the positioning groove extends through the end of the insertion hole along its length; and / or, it extends through the wall of the insertion hole along its radial direction; and the locking hole extends through the wall of the insertion hole along its radial direction.

[0011] In some embodiments of this application, the second positioning structure and the elastic protrusion are located on the same side of the insertion portion along a direction perpendicular to the axis of the insertion hole.

[0012] A second aspect of this application provides a traveling wheel device, including a traveling wheel assembly, which includes a wheel seat and a traveling wheel. The wheel seat includes a peripheral wall, a side wall, and a bushing. The peripheral wall and the side wall together define an accommodating space. One end of the bushing is connected to the side wall. A reinforcing rib is connected between the outer peripheral surface of the bushing and the peripheral wall. The reinforcing rib is connected to the side wall. The traveling wheel is located within the accommodating space and is rotatably connected to the bushing.

[0013] In some embodiments of this application, the reinforcing rib has a transition section formed at the end of the reinforcing rib facing the peripheral wall, and the transition section is connected to the peripheral wall.

[0014] In some embodiments of this application, the dimension of the transition section is W along the axial direction of the bushing, and the dimension of W increases gradually along the direction from the bushing to the peripheral wall.

[0015] In some embodiments of this application, the edge of the transition section away from the sidewall is a concave arc edge, and the arc edge is connected to the inner surface of the peripheral wall.

[0016] In some embodiments of this application, there are multiple reinforcing ribs, which are spaced apart along the circumferential direction of the bushing.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is an axonometric drawing of a child seat according to some embodiments of this application; Figure 2 This is a partial exploded view of the connection between the walking wheel assembly and the seat body in one of the embodiments of this application; Figure 3 This is a partial isometric view of the support leg in the walking wheel assembly of a child seat according to some embodiments of this application; Figure 4 This is a structural diagram of the wheel seat in a child seat according to some embodiments of this application (rear view of the elastic protrusion). Figure 5 for Figure 4 A magnified view of a portion of point I; Figure 6 This is an axonometric view of the wheel seat in one embodiment of this application; Figure 7 This is a structural diagram showing the cross-sections of the wheel seat and the reinforcing ribs in one embodiment of this application. Figure 8 This is an axonometric view of a walking wheel in a walking wheel device according to some embodiments of this application.

[0019] The reference numerals in the detailed embodiments are as follows: 100. Child car seats; 10. Seat body; 11. Seat board; 12. Armrest; 13. Backrest; 14. Support legs; 141. Insertion hole; 142. Snap-fit ​​hole; 143. First positioning structure; 15. Buffer sleeve; 20. Wheel assembly; 21. Wheel seat; 211. Insertion part; 212. Elastic protrusion; 213. Side wall; 214. Peripheral wall; 215. Bushing; 216. Reinforcing rib; 2161. Gradient section; 2162. Rounded edge; 2121. Fixed end; 2122. Free end; 217. Reinforcing part; 218. Second positioning structure; 22. Wheel; 221. Center hole; 30. Placement tray; 31. Groove. Detailed Implementation

[0020] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0022] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0025] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0026] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0027] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0028] According to the embodiments of this application, such as Figures 1-5 As shown, a child seat 100 is provided, including a seat body 10 and a wheel assembly 20. The seat body 10 has a insertion hole 141 at its bottom, and a snap-fit ​​hole 142 on the wall of the insertion hole 141. The wheel assembly 20 is located at the bottom of the seat body 10 and includes a wheel seat 21. A insertion part 211 is inserted into the insertion hole 141, and the side of the insertion part 211 facing the wall of the insertion hole 141 is connected to an elastic protrusion 212. The elastic protrusion 212 snaps into the snap-fit ​​hole 142, and a reinforcing part 217 is provided between the elastic protrusion 212 and the insertion part 211.

[0029] The elastic protrusion 212 can be a snap-fit ​​structure or an elastic rod that is inclined relative to the axis of the insertion hole 141, specifically inclined from the inside to the outside along the radial direction of the insertion hole 141.

[0030] The connection method between the elastic protrusion 212 and the insertion part 211 includes hot melt welding, bonding or integral molding.

[0031] The number of elastic protrusions 212 and snap-fit ​​holes 142 is the same, and one or more can be provided. For example, the number of elastic protrusions 212 and snap-fit ​​holes 142 is multiple, and multiple elastic protrusions 212 are spaced apart along the circumferential direction of the insertion hole 141, with each elastic protrusion 212 snapping into each snap-fit ​​hole 142.

[0032] During the movement of the child seat 100, the fixed end 2121 of the elastic protrusion 212 is easily subjected to stress under vibration, and is prone to breakage with the insertion part 211 under vibration impact. By providing the reinforcing part 217, the connection between the fixed end 2121 and the insertion part 211 can be strengthened, reducing the possibility of the fixed end 2121 breaking, which is beneficial to improving the reliability of the connection between the wheel seat 21 and the seat body 10.

[0033] In some embodiments of this application, such as Figure 1As shown, the seat body 10 includes a seat 11, armrests 12 and backrest 13. The backrest 13 is provided at the rear end of the seat 11, and armrests 12 are provided on the left and right sides of the seat 11 respectively. The armrests 12, seat 11 and backrest 13 together form a space for accommodating people to sit.

[0034] The bottom of the seat plate 11 is connected to a support structure, which can be a support leg 14 or a bracket. For example, the bottom of the seat plate 11 is connected to four support legs 14, and at least two of the four support legs 14 have the aforementioned insertion holes 141 at their bottom ends. Each insertion hole 141 is used to insert a wheel assembly 20, that is, the insertion part 211 of the wheel assembly 20 is inserted into the insertion hole 141. For example, the wheel assembly 20 can be set at the bottom of the first two support legs 14, or at the bottom of the last two support legs 14, or at the bottom of all four support legs 14. The four support legs 14 can also be connected to each other to form a bracket structure, which helps to improve the stability and strength of the child seat 100.

[0035] In some embodiments of this application, the elastic protrusion 212 includes a free end 2122 and a fixed end 2121. The fixed end 2121 is connected to the insertion part 211. A reinforcing part 217 is provided between the fixed end 2121 and the insertion part 211. Along the radial direction of the insertion hole 141, the free end 2122 protrudes from the fixed end 2121. The free end 2122 is held in engagement with the snap-fit ​​hole 142 by the elastic force of the elastic protrusion 212.

[0036] The free end 2122 can be located above or below the fixed end 2121; that is, the elastic protrusion 212 can be inclined upwards or downwards from the fixed end 2121 to the free end 2122. Figure 2 As shown, along the insertion direction of the insertion part 211 and the insertion hole 141, the fixed end 2121 and the free end 2122 are arranged in sequence, that is, the free end 2122 can be located below the fixed end 2121. When the insertion part 211 and the insertion hole 141 are inserted, the elastic protrusion 212 can smoothly enter the insertion hole 141. When the elastic protrusion 212 is aligned with the snap hole 142, the free end 2122 can protrude out of the snap hole 142 under the elastic action, so as to realize the snap-fit ​​between the wheel seat 21 and the bottom of the seat body 10.

[0037] In other embodiments, the free end 2122 may not be provided. Both ends of the elastic protrusion 212 are fixed to the insertion part 211. Along the radial direction of the insertion hole 141, the middle position of the elastic protrusion 212 protrudes from both ends of the elastic protrusion 212 to form a snap-fit ​​protrusion, which snaps into the snap-fit ​​hole 140.

[0038] By having the free end 2122 protrude from the fixed end 2121, the free end 2122 can move freely during the process of the insertion part 211 and the insertion hole 141, making it easier to spring into the snap hole 142, thereby reducing assembly resistance.

[0039] In some embodiments of this application, such as Figure 1 As shown, the bottom of the four support legs 14 that are not equipped with the walking wheel assembly 20 is fitted with a buffer sleeve 15. The buffer sleeve 15 can be made of rubber or plastic. On the one hand, it can prevent the support leg 14 from hitting a softer contact surface (such as the floor of a building) due to its hardness, causing damage to the contact surface. On the other hand, it can reduce the collision sound with the contact surface after the child seat 100 is moved, which helps to reduce noise.

[0040] In some embodiments of this application, such as Figure 1 As shown, the child seat 100 also includes a placement tray 30, which can be disposed on top of the two armrests 12 and detachably connected to the armrests 12, specifically by snap-fit ​​or screw connection. The top of the placement tray 30 is provided with a recess 31 for placing children's items. There can be one or more recesses 31, which can be used to place books, plates, or cups, etc.

[0041] In some embodiments of this application, such as Figure 4 and Figure 5 As shown, the insertion part 211 has a receiving cavity on the side facing the insertion hole 141, the fixed end 2121 is located in the receiving cavity, and a reinforcing part 217 is provided between the fixed end 2121 and part of the wall of the receiving cavity.

[0042] In some embodiments of this application, such as Figure 5 As shown, there are multiple reinforcing parts 217, which are spaced apart in the receiving cavity along the circumference of the insertion hole 141.

[0043] In one example, three reinforcing portions 217 are provided along the circumference of the insertion hole 141. One reinforcing portion 217 may be located at the center of the fixed end 2121 along the circumference of the insertion hole 141, and the other two reinforcing portions 217 may be located on both sides of the fixed end 2121 along the circumference of the insertion hole 141. The reinforcing portions 217 may be reinforcing ribs or protruding structures. The reinforcing portions 217, the fixed end 2121, and the insertion portion 211 may be integrally molded. Specifically, they may be manufactured by injection molding.

[0044] By providing multiple reinforcing parts 217, the connection between the fixed end 2121 and the insertion part 211 can be further enhanced, thereby reducing the possibility of the elastic protrusion 212 breaking at the fixed end 2121 and improving the reliability of the engagement between the elastic protrusion 212 and the snap-fit ​​hole 142.

[0045] In some embodiments of this application, such as Figure 2 and Figure 3 As shown, the end of the insertion hole 141 facing the wheel seat 21 is provided with a first positioning structure 143, and the side of the insertion part 211 facing the hole wall of the insertion hole 141 is provided with a second positioning structure 218. Along the circumferential direction of the insertion hole 141, the first positioning structure 143 and the second positioning structure 218 are positioned and engaged. One of the first positioning structure 143 and the second positioning structure 218 is a positioning groove, and the other of the first positioning structure 143 and the second positioning structure 218 is a positioning protrusion.

[0046] The positioning groove can be a rectangular groove, a U-shaped groove, or a semi-circular groove, etc.

[0047] In an embodiment where the second positioning structure 218 is a positioning groove, as an example, the positioning groove can penetrate the insertion end of the insertion part 211 along the length direction of the insertion part 211, that is, the positioning groove is a long groove, and the positioning protrusion can be formed on the inner surface of the insertion hole 141.

[0048] In an embodiment where the second positioning structure 218 is a positioning protrusion, as an example, such as Figure 2 As shown, along the length of the insertion portion 211, the positioning protrusion can be a protrusion extending from the root of the insertion portion 211. The positioning groove is an elongated groove that passes through the end of the insertion hole 141.

[0049] During installation, the positioning groove and positioning protrusion can be engaged first, and then the insertion part 211 can be moved axially to allow the free end 2122 of the elastic protrusion 212 to spring into the snap-fit ​​hole 142, thus completing the snap-fit ​​between the elastic protrusion 212 and the snap-fit ​​hole 142. Therefore, the positioning engagement of the positioning groove and positioning protrusion can restrict the movement of the insertion part 211 relative to the insertion hole 141 in the circumferential direction of the insertion hole 141, so that the elastic protrusion 212 can be snapped into the snap-fit ​​hole 142 more quickly during installation.

[0050] In some embodiments of this application, such as Figure 3 As shown, the first positioning structure 143 is a positioning groove. The positioning groove extends through the end of the insertion hole 141 along its length; and / or, it extends through the wall of the insertion hole 141 along its radial direction; and the locking hole 142 extends through the wall of the insertion hole 141 along its radial direction.

[0051] When the positioning groove penetrates both the end of the insertion hole 141 and the hole wall of the insertion hole 141, the positioning groove forms a notch at the end of the insertion hole 141. In other configurations, the positioning groove may penetrate the end of the insertion hole 141 but not the hole wall of the insertion hole 141.

[0052] When the positioning groove penetrates the end of the insertion hole 141, the positioning protrusion slides into the end of the positioning groove for positioning and engagement, reducing the difficulty of installation alignment. As the insertion depth of the insertion part 211 increases, the free end 2122 springs into the locking hole 142 under the action of elasticity. This avoids misalignment of the free end 2122 with the insertion hole 141 along the circumference during installation, which would otherwise require rotating the insertion part 211 to engage, thus improving the convenience of operation. When the positioning groove penetrates the wall of the insertion hole 141, positioning is achieved through visualization during positioning, ensuring that the free end 2122 can accurately engage with the locking hole 142, facilitating operation.

[0053] In some embodiments of this application, such as Figure 2 and Figure 3 As shown, along the direction perpendicular to the axis of the insertion hole 141, the second positioning structure 218 and the elastic protrusion 212 are provided on the same side of the insertion portion 211.

[0054] During the installation of the wheel assembly 20 and the seat body 10, the operator can observe the engagement of the positioning protrusion and the positioning groove, as well as the engagement status of the elastic protrusion 212 and the snap-fit ​​hole 142, from one side of the seat body 10. The assembly operation can be completed without changing the orientation, which is convenient for installation.

[0055] According to an embodiment of this application, a wheel device is provided for use in the aforementioned child seat. The wheel device includes a wheel assembly 20 in the aforementioned child seat 100. Wherein, as... Figures 6-8 As shown, the wheel assembly 20 includes the aforementioned wheel seat 21 and wheel 22. The wheel seat 21 includes a peripheral wall 214, a side wall 213, and a bushing 215. The peripheral wall 214 and the side wall 213 together define an accommodating space. One end of the bushing 215 is connected to the side wall 213. A reinforcing rib 216 is connected between the outer peripheral surface of the bushing 215 and the peripheral wall 214, and the reinforcing rib 216 is connected to the side wall 213. The wheel 22 is located within the accommodating space and is rotatably connected to the bushing 215.

[0056] The connection methods between the bushing 215 and the side wall 213 include bonding, welding, or integral molding.

[0057] The connection methods between the reinforcing rib 216 and the bushing 215, as well as the connection methods between the reinforcing rib 216 and the peripheral wall 214, include bonding, welding, or integral molding.

[0058] like Figure 6 and Figure 8As shown, the traveling wheel 22 can be a plastic wheel, a metal wheel, or a rubber wheel. The traveling wheel 22 can be rotatably connected to the wheel seat 21 via a rotating shaft. Specifically, the end of the rotating shaft passes through the central hole 221 of the traveling wheel 22 and is threadedly connected to the wheel seat 21, or it can pass through the wheel seat 21 and have an elastic retaining ring at the end passing through the wheel seat 21 for limiting. The central hole 221 of the traveling wheel 22 and the rotating shaft (not shown in the figure) are rotatably engaged, and the two can be clearance-fitted.

[0059] The sidewalls 213 and the peripheral walls 214 can be integrally formed by injection molding or 3D printing, or they can be fixed by welding or bonding.

[0060] The wheels 22 provide support for the child seat 100. To address the issue of the bushing 215 being prone to deformation and breakage, reinforcing ribs 216 are provided to support the bushing 215, thereby reducing the possibility of the bushing 215 breaking.

[0061] In some embodiments of this application, such as Figure 7 As shown, the reinforcing rib 216 has a transition section 2161, which is formed at the end of the reinforcing rib 216 facing the peripheral wall 214 and is connected to the peripheral wall 214. Along the axial direction of the bushing 215, the dimension of the transition section 2161 is W, and the dimension W increases gradually along the direction from the bushing 215 to the peripheral wall 214.

[0062] Along the axial direction of the bushing 215, both ends of the transition section 2161 can be concave arc edges 2162, convex arc edges, or straight edges, etc. Alternatively, one end of the transition section 2161 can be designed as a straight structure and connected to the side wall 213, while the other end, away from the side wall 213, can be designed as a concave arc edge 2162, a convex arc edge, or a straight edge, so that the dimension W increases gradually along the direction from the bushing 215 to the peripheral wall 214. Figure 7 As shown, one end of the transition section 2161 is designed as a straight structure and connected to the side wall 213. The other end, which is away from the side wall 213, is designed as a concave arc edge 2162 and connected to the peripheral wall 214. This not only increases the connection area between the reinforcing rib 216 and the side wall 213 and the peripheral wall 214 to enhance the connection strength between the bushing 215 and the wheel seat 21, but also provides clearance space for the installation of the traveling wheel 22 through the concave arc edge 2162, avoiding interference with the traveling wheel 22.

[0063] By increasing the size of W, the stress concentration at the connection between the reinforcing rib 216 and the peripheral wall 214 can be reduced, thus preventing breakage at the connection due to excessive stress concentration and giving the wheel seat 21 better support strength.

[0064] When the wheel seat 21 bears the weight load of the child seat 100 and the vibration impact during movement, the stress is transferred from the main body of the reinforcing rib 216 through the transition section 2161 to the peripheral wall 214. The concave arc edge 2162 can guide the stress to gradually transition along the arc tangent direction to the inner surface of the peripheral wall 214, avoiding the formation of large stress concentration at the connection position. This avoids the possibility of the wheel seat 21 breaking at the connection position of the reinforcing rib 216 and the peripheral wall 214. It disperses the stress borne by the wheel seat 21 as much as possible to the side wall 213 and the peripheral wall 214, rather than concentrating it between the bushing 215 and the side wall 213, thus avoiding the possibility of the connection position of the bushing 215 and the side wall 213 and improving the durability of the wheel seat 21.

[0065] In some embodiments of this application, such as Figure 6 As shown, there are multiple reinforcing ribs 216, which are spaced apart along the circumferential direction of the bushing 215.

[0066] The circumferentially spaced distribution of multiple reinforcing ribs 216 can significantly enhance the overall structural rigidity of the wheel seat 21. During vibration (such as when the child seat 100 moves or when a child moves on the seat), the multiple reinforcing ribs 216 can collectively absorb impact energy. By dispersing the impact force of the bushing 215 on the peripheral wall 214 and / or side wall 213, the impact force of the wheel seat 21 on the peripheral wall 214 and / or side wall 213 is reduced, thereby reducing the possibility of damage to the wheel seat 21 due to large overall deformation. This helps to improve the service life of the wheel seat 21 and reduce the cost of subsequent maintenance and replacement.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A child car seat, characterized in that, include: The seat body (10) has a bottom insertion hole (141) and a snap-fit ​​hole (142) on the wall of the insertion hole (141). The walking wheel assembly (20) is located at the bottom of the seat body (10). The walking wheel assembly (20) includes a wheel seat (21). The wheel seat (21) has a plug-in part (211) and an elastic protrusion (212). The plug-in part (211) is plugged into the plug-in hole (141). The side of the plug-in part (211) facing the hole wall of the plug-in hole (141) is connected to the elastic protrusion (212). The elastic protrusion (212) is engaged with the snap-fit ​​hole (142). A reinforcing part (217) is provided between the elastic protrusion (212) and the plug-in part (211).

2. The child seat according to claim 1, characterized in that, The elastic protrusion (212) includes a free end (2122) and a fixed end (2121). The fixed end (2121) is connected to the plug-in part (211). The reinforcing part (217) is provided between the fixed end (2121) and the plug-in part (211). Along the radial direction of the plug-in hole (141), the free end (2122) protrudes from the fixed end (2121). The free end (2122) is held in engagement with the snap-fit ​​hole (142) under the elastic force of the elastic protrusion (212).

3. The child seat according to claim 2, characterized in that, The plug-in part (211) has a receiving cavity on the side facing the plug-in hole (141), the fixed end (2121) is located in the receiving cavity, and the reinforcing part (217) is provided between the fixed end (2121) and part of the wall of the receiving cavity.

4. The child seat according to claim 3, characterized in that, The number of the reinforcing parts (217) is multiple, and the multiple reinforcing parts (217) are spaced apart in the receiving cavity along the circumference of the insertion hole (141).

5. The child seat according to claim 1, characterized in that, The insertion hole (141) is provided with a first positioning structure (143) at the end facing the wheel seat (21), and the insertion part (211) is provided with a second positioning structure (218) on the side facing the hole wall of the insertion hole (141). Along the circumferential direction of the insertion hole (141), the first positioning structure (143) and the second positioning structure (218) are positioned and engaged. One of the first positioning structure (143) and the second positioning structure (218) is a positioning groove, and the other of the first positioning structure (143) and the second positioning structure (218) is a positioning protrusion.

6. A walking wheel device, characterized in that, Includes a walking wheel assembly (20), the walking wheel assembly (20) comprising: The wheel seat (21) includes a peripheral wall (214), a side wall (213) and a bushing (215). The peripheral wall (214) and the side wall (213) together define an accommodating space. One end of the bushing (215) is connected to the side wall (213). A reinforcing rib (216) is connected between the outer peripheral surface of the bushing (215) and the peripheral wall (214). The reinforcing rib (216) is connected to the side wall (213). The traveling wheel (22) is located within the receiving space and is rotatably connected to the bushing (215).

7. The walking wheel device according to claim 6, characterized in that, The reinforcing rib (216) has a transition section (2161) formed at one end of the reinforcing rib (216) facing the peripheral wall (214), and the transition section (2161) is connected to the peripheral wall (214).

8. The walking wheel device according to claim 7, characterized in that, Along the axial direction of the bushing (215), the size of the transition section (2161) is W, and the size of W increases in the direction from the bushing (215) to the peripheral wall (214).

9. The walking wheel device according to claim 8, characterized in that, The edge of the transition section (2161) facing away from the side wall (213) is a concave arc edge (2162), and the arc edge (2162) is in contact with the inner surface of the peripheral wall (214).

10. The walking wheel device according to claim 7, characterized in that, The number of the reinforcing ribs (216) is multiple, and the multiple reinforcing ribs (216) are spaced apart along the circumferential direction of the bushing (215).

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