Child safety seat

Abstract

The utility model discloses a child safety seat. The child safety seat comprises a base set and a backrest. The base set comprises a base and a rotating shaft connected with the base. The backrest comprises a back wall, side wing walls and connecting hooks; the side wing walls are bent in the left-right direction of the child safety seat and connected to the two sides of the back wall. The connecting hook is connected to the bottom side of the back wall, and the connecting hook is buckled to the radial periphery of the connecting shaft; a first reinforcing part is arranged at the bottom end of the back wall close to the corner, and a second reinforcing part is arranged at the bottom end of the back wall corresponding to the connecting hook. The backrest in the design is high in structural strength, and the use safety of the child safety seat can be effectively guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of children's appliances, and in particular to a child safety seat. Background Art

[0002] With growing awareness of child safety in vehicles, the use of child safety seats is becoming increasingly common. A child safety seat comprises a base assembly and a backrest. The backrest's connecting hook connects to the base assembly's connecting shaft, securing the backrest to the base assembly's base. However, in related child safety seats, when a child's back rests on the backrest, the backrest is squeezed and prone to deformation or even breakage, posing a safety hazard. Therefore, effectively strengthening the backrest's structural strength to ensure the safety of child safety seats has become an urgent issue. Utility Model Content

[0003] The embodiment of the present application provides a child safety seat, which can solve the problem that child safety seats in related technologies have safety hazards due to weak structural strength of the backrest.

[0004] An embodiment of the present application provides a child safety seat; the child safety seat includes a base group and a backrest, the base group includes a base and a rotating shaft connected to the base, the backrest includes a back wall, side wing walls and a connecting hook, the side wing walls are bent along the left and right directions of the child safety seat and connected to both sides of the back wall, the connecting hook is connected to the bottom side of the back wall, and the connecting hook is buckled to the radial outer periphery of the connecting shaft, a first reinforcement portion is provided at the bottom end of the back wall adjacent to the corner, and a second reinforcement portion is provided at the bottom end of the back wall corresponding to the connecting hook.

[0005] In the child safety seat according to the embodiment of the present application, a first reinforcement portion is provided at a position adjacent to a corner at the bottom end of the back wall. The first reinforcement portion can strengthen the structural strength of the corner at the bottom end of the back wall. Thus, when the backrest is squeezed and the main load is concentrated at the corner at the bottom end of the back wall, the corner at the bottom end of the back wall is less likely to deform or break, thereby effectively ensuring the safety of the child safety seat. A second reinforcement portion is provided at a position corresponding to the connecting hook at the bottom end of the back wall. The second reinforcement portion can strengthen the structural strength of the position corresponding to the connecting hook at the bottom end of the back wall. Thus, when the backrest is squeezed and the main load is concentrated at the position corresponding to the connecting hook at the bottom end of the back wall, the bottom end of the back wall is less likely to deform or break, thereby effectively ensuring the safety of the child safety seat.

[0006] In some embodiments, the first reinforcement portion includes a first reinforcement groove recessed from the front side of the back wall. Alternatively, the first reinforcement portion includes a first reinforcement rib protruding from the rear side of the back wall. Alternatively, the bottom end of the back wall, corresponding to the connection hook, bends from the front of the child safety seat toward the rear of the child safety seat to form a rubber reduction groove. Alternatively, the second reinforcement portion includes a second reinforcement rib located within the rubber reduction groove and connected to the wall surface of the rubber reduction groove.

[0007] Based on the above embodiment, by designing a first reinforcement groove at the bottom corner position of the front side of the back wall, the first reinforcement groove can strengthen the structural strength of the bottom corner position of the back wall. In this way, when the backrest is squeezed and the main load is concentrated at the bottom corner position of the back wall, the bottom corner position of the back wall is not easily deformed or broken, which can effectively ensure the safety of the child safety seat. And / or, by designing a first reinforcement rib at the bottom corner position of the rear side of the back wall, the first reinforcement rib can strengthen the structural strength of the bottom corner position of the back wall. In this way, when the backrest is squeezed and the main load is concentrated at the bottom corner position of the back wall, the bottom corner position of the back wall is not easily deformed or broken, which can effectively ensure the safety of the child safety seat. By designing a glue reduction groove, the glue reduction groove can ensure that the wall thickness of the backrest is uniform, which is convenient for processing and molding. And / or, by measuring a second reinforcing rib in the glue reducing groove provided in the corresponding connecting hook, the second reinforcing rib can strengthen the structural strength of the glue reducing groove corresponding to the bottom end of the back wall and the connecting hook. In this way, when the backrest is squeezed and the main load is concentrated on the position corresponding to the bottom end of the back wall and the connecting hook, the position corresponding to the bottom end of the back wall and the connecting hook is not easily deformed or broken, which can effectively ensure the safety of the child safety seat.

[0008] In some embodiments, the bottom surface of the first reinforcement groove and the side surface of the first reinforcement groove transition in an arc shape. And / or, the side surface of the first reinforcement groove and the front side surface of the back wall transition in an arc shape.

[0009] Based on the above embodiment, by designing a circular arc transition between the bottom surface of the first reinforcement groove and the side surface of the first reinforcement groove, the load is not concentrated on the corners of the first reinforcement groove, the load is dispersed, the structural strength of the first reinforcement groove is improved, and the corners at the bottom end of the back wall are less likely to deform or break, thereby effectively ensuring the safety of the child safety seat. And / or, by designing a circular arc transition between the side surface of the first reinforcement groove and the front side surface of the back wall, the load is not concentrated on the corners of the first reinforcement groove, the load is dispersed, the structural strength of the first reinforcement groove is improved, and the corners at the bottom end of the back wall are less likely to deform or break, thereby effectively ensuring the safety of the child safety seat.

[0010] In some embodiments, the bottom end of the back wall corresponding to the connecting hook is bent from the front to the rear of the child safety seat to form a glue reduction groove; the connection between the back wall above the glue reduction groove and the groove wall of the glue reduction groove is an arc transition.

[0011] Based on the above embodiment, by designing a circular arc transition at the connection between the back wall located above the glue reduction groove and the groove wall of the glue reduction groove, the load will not be concentrated on the corners of the glue reduction groove, and the load can be dispersed, so that the position of the glue reduction groove corresponding to the bottom end of the back wall and the connecting hook is less likely to deform or break, thereby effectively ensuring the safety of the child safety seat.

[0012] In some embodiments, the back wall bends from the front of the child safety seat to the rear of the child safety seat to form an elongated groove, the elongated groove extends in the up-down direction of the child safety seat, and the bottom end of the elongated groove extends to connect with the rubber reduction groove; a third reinforcement portion is provided on the rear side surface of the back wall at a position corresponding to the bottom end of the elongated groove.

[0013] Based on the above embodiment, a third reinforcement portion is designed on the rear side surface of the back wall corresponding to the bottom end of the long strip groove. On the one hand, the third reinforcement portion can strengthen the structural strength of the back wall at the position where the bottom end of the long strip groove is located. On the other hand, the third reinforcement portion can assist in strengthening the structural strength of the position where the bottom end of the back wall and the glue reduction groove corresponding to the connecting hook are located, making the position where the bottom end of the back wall and the glue reduction groove corresponding to the connecting hook less likely to deform or break, so as to effectively ensure the safety of the child safety seat.

[0014] In some embodiments, the third reinforcement portion includes a third reinforcement rib protruding from the rear side of the back wall.

[0015] Based on the above embodiment, a third reinforcing rib is designed on the rear side surface of the back wall corresponding to the bottom end of the long strip groove. On the one hand, the third reinforcing rib can strengthen the structural strength of the back wall at the position where the bottom end of the long strip groove is located. On the other hand, the third reinforcing rib can assist in strengthening the structural strength of the position where the bottom end of the back wall and the glue reduction groove corresponding to the connecting hook are located, making the position where the bottom end of the back wall and the glue reduction groove corresponding to the connecting hook less likely to deform or break, so as to effectively ensure the safety of the child safety seat.

[0016] In some embodiments, the back wall includes a first wall and a second wall disposed around the first wall; the bottom side of the first wall is connected to the second wall, and a gap is formed between the first wall and the second wall along both sides of the left-right direction of the child safety seat. The back wall also includes a connecting rib, the connecting rib being at least partially located within the gap and connecting the connecting rib to the first wall and the second wall; the connection between the connecting rib and the first wall is a circular arc transition, and / or the connection between the connecting rib and the second wall is a circular arc transition.

[0017] Based on the above embodiment, by designing a circular arc transition at the connection between the connecting rib and the first wall, the load is not concentrated on the corners of the connecting rib, and the load is dispersed, making the connecting rib between the first wall and the second wall less likely to deform or break, thereby ensuring the connection stability between the first wall and the second wall. And / or, by designing a circular arc transition at the connection between the connecting rib and the second wall, the load is not concentrated on the corners of the connecting rib, and the load is dispersed, making the connecting rib between the first wall and the second wall less likely to deform or break, thereby ensuring the connection stability between the first wall and the second wall.

[0018] In some embodiments, the child safety seat further includes a headrest and a shoulder strap guard webbing; the headrest is movably connected to the backrest, the headrest having a first perforation, a fixing hole, and a second perforation arranged in sequence from top to bottom along the up and down direction of the child safety seat, a fourth reinforcement portion is provided at a position of the headrest adjacent to the fixing hole, and a fifth reinforcement portion is provided at a position of the headrest adjacent to the second perforation; the ends of the shoulder strap guard webbing are penetrated by the first perforation and the second perforation and are connected to the fixing hole through fasteners.

[0019] Based on the above embodiment, by designing the first perforation and the second perforation, the first perforation and the second perforation are used to allow the end of the shoulder strap guard webbing to pass through; by designing the fastener, the fastener is used to cooperate with the fixing hole to achieve the relative fixation of the position between the end of the shoulder strap guard webbing and the headrest, the structure is simple and easy to implement. By designing the fourth reinforcement part at the position of the headrest corresponding to the fixing hole, the fourth reinforcement part can strengthen the structural strength of the headrest at the position of the fixing hole to ensure the connection stability between the end of the shoulder strap guard webbing and the headrest. By designing the fifth reinforcement part at the position of the headrest corresponding to the second perforation, the fifth reinforcement part can strengthen the structural strength of the headrest at the position of the second perforation to ensure the connection stability between the end of the shoulder strap guard webbing and the headrest.

[0020] In some embodiments, the fourth reinforcement portion includes a fourth reinforcement rib, which is arranged along the edge of the fixing hole and is connected to the headrest plate. And / or, the fourth reinforcement portion includes a fifth reinforcement rib, which is arranged on both sides of the fixing hole along the radial direction of the fixing hole and is connected to the headrest plate. And / or, the fifth reinforcement portion includes a sixth reinforcement rib, which is arranged along the edge of the second perforation and is connected to the headrest plate. And / or, the fifth reinforcement portion includes a seventh reinforcement rib, which is arranged on both sides of the second perforation along the radial direction of the fixing hole and is connected to the headrest plate.

[0021] Based on the above embodiment, by designing a fourth reinforcing rib along the edge of the fixing hole, the fourth reinforcing rib can enhance the structural strength of the headrest plate at the edge of the fixing hole. This, on the one hand, can strengthen the structural strength of the headrest plate at the location corresponding to the fixing hole, thereby ensuring the connection stability between the end of the shoulder strap guard webbing and the headrest plate. On the other hand, this can effectively reduce the possibility of deformation or breakage of the headrest plate near the fixing hole due to excessive force during the connection between the fastener and the fixing hole. And / or, by designing a fifth reinforcing rib, the fifth reinforcing rib can not only strengthen the structural strength of the headrest plate at the location corresponding to the fixing hole, but also strengthen the structural strength of the headrest plate near the fixing hole, thereby ensuring the connection stability between the end of the shoulder strap guard webbing and the headrest plate. And / or, by designing a sixth reinforcing rib along the edge of the second perforation, the sixth reinforcing rib can enhance the structural strength of the headrest at the edge of the second perforation. This can, on the one hand, strengthen the structural strength of the headrest at the location corresponding to the second perforation, thereby effectively reducing the possibility of deformation or fracture of the headrest near the second perforation due to excessive pressure from the shoulder strap guard webbing on the headrest. And / or, by designing a seventh reinforcing rib, the seventh reinforcing rib can not only strengthen the structural strength of the headrest at the location corresponding to the second perforation, but also strengthen the structural strength of the headrest near the second perforation, thereby effectively reducing the possibility of deformation or fracture of the headrest near the second perforation due to excessive pressure from the shoulder strap guard webbing on the headrest.

[0022] In some embodiments, the child safety seat further includes an adjustment handle and a spring; the adjustment handle is movably connected to the headrest, the adjustment handle is provided with a lower stop protrusion, and the headrest is provided with an upper stop protrusion; the bottom end of the spring is sleeved on the lower stop protrusion, the top end of the spring abuts against the upper stop protrusion, and the projection of the spring on the abutting surface of the upper stop protrusion completely falls within the abutting surface of the upper stop protrusion.

[0023] Based on the above embodiment, it is easy to realize the assembly between the bottom end of the spring and the lower stop protrusion, and the assembly between the top end of the spring and the upper stop protrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a partial structural diagram of a child safety seat in one embodiment of the present application;

[0026] Figure 2This is a schematic structural diagram of a backrest in an embodiment of the present application at a first viewing angle;

[0027] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 4 This is a schematic diagram of the structure of the backrest at a second viewing angle in an embodiment of the present application;

[0029] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at B in the middle;

[0030] Figure 6 This is a schematic diagram of the structure of an embodiment of the present application when the back is leaning against the body from a third viewing angle;

[0031] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at C in the middle;

[0032] Figure 8 This is a schematic diagram of a structure in an embodiment of the present application with the back resting at a fourth viewing angle;

[0033] Figure 9 for Figure 8 Schematic diagram of the enlarged structure at D in the middle;

[0034] Figure 10 This is a schematic diagram of the assembly structure of the headrest plate and the adjustment handle in one embodiment of the present application;

[0035] Figure 11 for Figure 10 Schematic diagram of the enlarged structure at E in the middle;

[0036] Figure 12 This is a schematic diagram of the exploded structure of the headrest and the adjustment handle in one embodiment of the present application;

[0037] Figure 13 for Figure 12 Schematic diagram of the enlarged structure at F in the middle;

[0038] Figure 14 This is a structural diagram of an adjustment handle in one embodiment of the present application.

[0039] Figure 1: Child safety seat; 10: Base assembly; 11: Base; 20: Backrest; 21: Back wall; 21a: Glue reduction groove; 21b: Long strip groove; 211: First wall; 212: Second wall; 213: Connecting rib; 22: Side wing wall; 23: Connecting hook; 23a: Hollow groove; 24: First reinforcement portion; 241: First reinforcement groove; 242: First reinforcement rib; 25: Second reinforcement portion; 251: First reinforcement portion Second reinforcing rib; 26, third reinforcing portion; 261, third reinforcing rib; 31, headrest plate; 31a, first through-hole; 31b, fixing hole; 31c, second through-hole; 32, fourth reinforcing portion; 321, fourth reinforcing rib; 322, fifth reinforcing rib; 33, fifth reinforcing portion; 331, sixth reinforcing rib; 332, seventh reinforcing rib; 34, upper stop protrusion; 41, adjustment handle; 42, lower stop protrusion; 50, spring. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0041] Please refer to Figure 1-Figure 5 As shown, the present application proposes a child safety seat 1 , the backrest 20 of which has a strong structural strength and can effectively ensure the safety of the child safety seat 1 .

[0042] The child safety seat 1 includes a base assembly 10 and a backrest 20. The base assembly 10 includes a base 11 and a rotating shaft connected to the base 11. The backrest 20 includes a back wall 21, side wing walls 22, and connecting hooks 23. The side wing walls 22 are bent and connected to the sides of the back wall 21 in the left-right direction of the child safety seat 1. The connecting hooks 23 are connected to the bottom side of the back wall 21 and are buckled onto the radial outer periphery of the connecting shaft. A first reinforcement portion 24 is provided at the bottom end of the back wall 21 near the corner, and a second reinforcement portion 25 is provided at the bottom end of the back wall 21 corresponding to the connecting hooks 23.

[0043] The following combination Figures 1-14 The specific structure of the child safety seat 1 is introduced in detail.

[0044] like Figure 1-Figure 5 As shown, the child safety seat 1 comprises a base assembly 10 and a backrest 20 .

[0045] The base assembly 10 serves as a support for the child safety seat 1 for a child to sit on; the base assembly 10 includes a base 11 and a connecting shaft (not shown in the figure).

[0046] The base 11 serves as the main body of the base assembly 10 for children to sit on. The specific structure of the base 11 is not limited here, and designers can make reasonable designs based on actual needs.

[0047] The connecting shaft, as a connecting member of the base assembly 10, cooperates with the backrest 20 to achieve a connection between the backrest 20 and the base 11. The connecting shaft is connected to the base 11; the specific connection method between the connecting shaft and the base 11 is not limited here, and designers can reasonably design it according to actual needs. For example, the connecting shaft can be, but is not limited to, detachably connected to the base 11 through at least one of a screw connection, a snap connection, or a plug connection. For another example, the connecting shaft can also be, but is not limited to, non-detachably connected to the base 11 through gluing or injection molding.

[0048] The backrest 20 serves as the backrest of the child safety seat 1 for supporting the child's back. The backrest 20 includes a back wall 21 , side wing walls 22 and a connecting hook 23 .

[0049] The back wall 21 serves as the main supporting portion of the backrest 20 for supporting the child's back. The specific structural design of the back wall 21 will be described in detail below.

[0050] The side wing walls 22 serve as auxiliary supporting parts of the backrest 20 for the child's left and right arms to support; the specific structure of the side wing walls 22 is not limited here, and designers can make reasonable designs based on actual needs; for example, the side wing walls 22 can be, but are not limited to, an arched structure such as a C-shape.

[0051] The side wing walls 22 are bent and connected to the sides of the back wall 21 along the left-right direction of the child safety seat 1. The side wing walls 22 and the back wall 21 may be, but are not limited to, formed as an integral structure by injection molding. For example, the side wing walls 22 include a left wing wall 22 and a right wing wall 22. The left wing wall 22 and the right wing wall 22 are bent and connected to the left and right sides of the back wall 21 along the left-right direction of the child safety seat 1 (i.e., the left wing wall 22 is bent and connected to the left side of the back wall 21, and the right wing wall 22 is bent and connected to the right side of the back wall 21). The left wing wall 22, the right wing wall 22, and the back wall 21 are integrally formed by injection molding.

[0052] The connecting hook 23 serves as a connecting portion of the backrest 20 and is used to cooperate with the connecting shaft to achieve the connection between the backrest 20 and the base 11. The connecting hook 23 is connected to the bottom side of the back wall 21; wherein, the connecting hook 23 can be, but is not limited to, formed into an integral structure with the back wall 21 by injection molding.

[0053] The connecting hook 23 is buckled onto the radial outer periphery of the connecting shaft. It should be noted that the connecting hook 23 can rotate around the axis of the connecting shaft to adjust the angle of the backrest 20 relative to the seat. The user can adjust the angle of the backrest 20 according to actual needs to improve the comfort of the child.

[0054] like Figure 2-Figure 3 As shown, when a child sits on the base 11, the child's back rests on the backrest 20, which is squeezed and the primary load is concentrated at the corners of the bottom of the back wall 21. This can easily cause deformation or even breakage at the corners of the bottom of the back wall 21, posing a safety hazard. To enhance the structural strength of the corners of the bottom of the back wall 21, a first reinforcement portion 24 is provided at the bottom of the back wall 21, adjacent to the corners.

[0055] The first reinforcement portion 24 serves as a reinforcing structure to enhance the structural strength of the corners of the bottom end of the back wall 21. The specific form of the first reinforcement portion 24 is not limited herein, and designers may design it appropriately based on actual needs. For example, the first reinforcement portion 24 may include, but is not limited to, a physical structure such as a reinforcing rib disposed at the corners of the bottom end of the back wall 21. Alternatively, the first reinforcement portion 24 may include, but is not limited to, a virtual structure such as a reinforcing groove formed at the corners of the bottom end of the back wall 21.

[0056] like Figure 4-Figure 5 As shown, considering that the backrest 20 is connected to the base 11 by the connection hook 23 and the connecting shaft, when a child sits on the base 11, the child's back rests on the backrest 20, which is squeezed and the main load is concentrated at the bottom of the back wall 21 corresponding to the connection hook 23. This can easily cause the bottom of the back wall 21 corresponding to the connection hook 23 to deform or even break, posing a safety hazard. To enhance the structural strength of the bottom of the back wall 21 corresponding to the connection hook 23, a second reinforcement portion 25 is provided at the bottom of the back wall 21 corresponding to the connection hook 23.

[0057] The second reinforcement portion 25 serves as a reinforcing structure for strengthening the structural strength of the bottom end of the back wall 21 at the position corresponding to the connecting hook 23. The specific form of the second reinforcement portion 25 is not limited here, and designers can reasonably design it according to actual needs. For example, the second reinforcement portion 25 can include, but is not limited to, a physical structure such as a reinforcing rib provided at the bottom end of the back wall 21 at the position corresponding to the connecting hook 23. For another example, the second reinforcement portion 25 can also include, but is not limited to, a virtual structure such as a reinforcing groove formed at the bottom end of the back wall 21 at the position corresponding to the connecting hook 23.

[0058] In the child safety seat 1 of the embodiment of the present application, a first reinforcement 24 is provided at a position adjacent to a corner of the bottom end of the back wall 21. The first reinforcement 24 strengthens the structural strength of the corners of the bottom end of the back wall 21. This prevents deformation or breakage at the corners of the bottom end of the back wall 21 when the backrest 20 is compressed and the primary load is concentrated there, effectively ensuring the safety of the child safety seat 1. A second reinforcement 25 is provided at a position corresponding to the connecting hook 23 at the bottom end of the back wall 21. The second reinforcement 25 strengthens the structural strength of the position corresponding to the connecting hook 23 at the bottom end of the back wall 21. This prevents deformation or breakage at the corners of the bottom end of the back wall 21 when the backrest 20 is compressed and the primary load is concentrated there, effectively ensuring the safety of the child safety seat 1.

[0059] The specific structural design of the first reinforcement portion 24 and the specific structural design of the second reinforcement portion 25 may include, but is not limited to, one or more of the following embodiments.

[0060] like Figure 2-Figure 3 As shown, in the first embodiment, the first reinforcement portion 24 includes a reinforcement groove 241 recessed from the front side of the back wall 21. The reinforcement groove 241 is integrally formed at the corner of the front side of the back wall 21 by injection molding. By designing the reinforcement groove 241 at the bottom corner of the front side of the back wall 21, the reinforcement groove 241 can enhance the structural strength of the bottom corner of the back wall 21. This prevents deformation or fracture at the bottom corner of the back wall 21 when the backrest 20 is squeezed and the primary load is concentrated at the bottom corner of the back wall 21, effectively ensuring the safety of the child safety seat 1.

[0061] Specifically, the bottom surface of the reinforcement groove 241 and the side surface of the reinforcement groove 241 have an arc transition. The R angle between the bottom surface of the reinforcement groove 241 and the side surface of the reinforcement groove 241 can be greater than or equal to 1.0 mm and less than or equal to 2.0 mm. For example, the R angle between the bottom surface of the reinforcement groove 241 and the side surface of the reinforcement groove 241 can be, but is not limited to, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2.0 mm, etc. Preferably, the R angle between the bottom surface of the reinforcement groove 241 and the side surface of the reinforcement groove 241 is 1.5 mm. By designing the arc transition between the bottom surface of the reinforcing groove 241 and the side surface of the reinforcing groove 241, the load will not be concentrated on the corners of the reinforcing groove 241, the load can be dispersed, the structural strength of the reinforcing groove 241 is improved, and the corners at the bottom end of the back wall 21 are less likely to deform or break, thereby effectively ensuring the safety of the child safety seat 1.

[0062] Specifically, the groove side surface of the reinforcing groove 241 and the front side surface of the back wall 21 form a circular arc transition. The R angle between the groove side surface of the reinforcing groove 241 and the front side surface of the back wall 21 can be greater than or equal to 1.0 mm and less than or equal to 2.0 mm. For example, the R angle between the groove side surface of the reinforcing groove 241 and the front side surface of the back wall 21 can be, but is not limited to, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2.0 mm, etc. Preferably, the R angle between the groove side surface of the reinforcing groove 241 and the front side surface of the back wall 21 is 1.5 mm. By designing the groove side surface of the reinforcing groove 241 and the front side surface of the back wall 21 to form a circular arc transition, the load is not concentrated on the corners of the reinforcing groove 241, but is dispersed, the structural strength of the reinforcing groove 241 is improved, and the corners at the bottom end of the back wall 21 are less likely to deform or break, thereby effectively ensuring the safety of the child safety seat 1.

[0063] like Figure 4-Figure 7As shown, in the second embodiment, the first reinforcing portion 24 includes a first reinforcing rib 242 protruding from the rear side of the back wall 21. The first reinforcing rib 242 is integrally formed at the corner of the rear side of the back wall 21 by injection molding. The thickness of the first reinforcing rib 242 is greater than or equal to 0.5 mm and less than or equal to 2.0 mm; for example, the thickness of the first reinforcing rib 242 can be, but is not limited to, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2.0 mm, etc. Preferably, the thickness of the first reinforcing rib 242 is 1.0 mm. By designing first reinforcing ribs 242 at the bottom corners of the rear side of the back wall 21, the first reinforcing ribs 242 can strengthen the structural strength of the bottom corners of the back wall 21. This prevents deformation or breakage at the bottom corners of the back wall 21 when the backrest 20 is squeezed and the primary load is concentrated at the bottom corners of the back wall 21, effectively ensuring the safety of the child safety seat 1. It should be noted that the first reinforcing ribs 242 designed at the bottom corners of the rear side of the back wall 21 and the reinforcing grooves 241 designed at the bottom corners of the front side of the back wall 21 cooperate to provide a dual reinforcement effect on the structural strength of the bottom corners of the back wall 21, thereby further effectively improving the structural strength of the bottom corners of the back wall 21.

[0064] like Figure 2-Figure 3 As shown, in the third embodiment, the bottom end of the back wall 21 and the position corresponding to the connecting hook 23 are bent from the front of the child safety seat 1 to the rear of the child safety seat 1 to form a glue reduction groove 21a; the second reinforcement portion 25 includes a second reinforcement rib 251 located in the glue reduction groove 21a and connected to the groove wall surface of the glue reduction groove 21a. Among them, the second reinforcement rib 251 can be connected only to the groove bottom wall of the glue reduction groove 21a, or only to the groove side wall of the glue reduction groove 21a, or to both the groove bottom wall and the groove side wall of the glue reduction groove 21a. The second reinforcement rib 251 is integrally formed with the groove wall surface of the glue reduction groove 21a by injection molding. By designing the glue reduction groove 21a, the glue reduction groove 21a can ensure that the wall thickness of the backrest 20 is uniform throughout, which is convenient for processing and molding. By measuring the second reinforcing rib 251 in the glue reducing groove 21a provided in the corresponding connecting hook 23, the second reinforcing rib 251 can strengthen the structural strength of the glue reducing groove 21a corresponding to the bottom end of the back wall 21 and the connecting hook 23. In this way, when the backrest 20 is squeezed and the main load is concentrated on the position corresponding to the bottom end of the back wall 21 and the connecting hook 23, the position corresponding to the bottom end of the back wall 21 and the connecting hook 23 is not easy to be deformed or broken, which can effectively ensure the safety of the child safety seat 1.

[0065] like Figure 2-Figure 3 As shown, the end of the connecting hook 23 near the glue reducing groove 21a is provided with a hollow groove 23a, and the bottom surface of the hollow groove 23a and the groove side surface of the hollow groove 23a are in a circular arc transition. The rounded angle between the bottom surface of the hollow groove 23a and the groove side surface of the hollow groove 23a can be greater than or equal to 1.0 mm and less than or equal to 2.0 mm. For example, the rounded angle between the bottom surface of the hollow groove 23a and the groove side surface of the hollow groove 23a can be, but is not limited to, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2.0 mm, etc. Preferably, the rounded angle between the bottom surface of the hollow groove 23a and the groove side surface of the hollow groove 23a is 1.5 mm. By designing the arc transition of the bottom surface of the hollow groove 23a and the groove side surface of the hollow groove 23a, the load will not be concentrated at the position where the connecting hook 23 is connected to the back wall 21, the load can be dispersed, and the structural strength of the position where the connecting hook 23 is connected to the back wall 21 is improved, so that the position where the connecting hook 23 is connected to the back wall 21 is not easily deformed or broken, thereby effectively ensuring the safety of the child safety seat 1.

[0066] like Figure 4-Figure 5 As shown, the connection between the back wall 21 above the glue reduction groove 21a and the groove wall of the glue reduction groove 21a is an arc transition. Wherein, the R angle of the connection between the back wall 21 above the glue reduction groove 21a and the groove wall of the glue reduction groove 21a can be greater than or equal to 1.5 mm and less than or equal to 3.0 mm. For example, the R angle of the connection between the back wall 21 above the glue reduction groove 21a and the groove wall of the glue reduction groove 21a can be but not limited to 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 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm or 3.0 mm, etc. Preferably, the R angle of the connection between the back wall 21 above the glue reduction groove 21a and the groove wall of the glue reduction groove 21a is 2.0 mm. By designing a circular arc transition at the connection between the back wall 21 located above the glue-reducing groove 21a and the groove wall of the glue-reducing groove 21a, the load is not concentrated on the corners of the glue-reducing groove 21a, but is dispersed. This makes the location of the glue-reducing groove 21a at the bottom of the back wall 21 corresponding to the connecting hook 23 less likely to deform or break, thereby effectively ensuring the safety of the child safety seat 1. It should be noted that the "groove wall of the glue-reducing groove 21a" refers to the three-dimensional solid portion corresponding to the wall thickness of the glue-reducing groove 21a, and does not refer to the two-dimensional surface corresponding to the groove wall surface of the glue-reducing groove 21a.

[0067] like Figure 4-Figure 7As shown, the back wall 21 bends from the front of the child safety seat 1 to the rear of the child safety seat 1 to form an elongated groove 21b. The elongated groove 21b extends in the up-down direction of the child safety seat 1, and the bottom end of the elongated groove 21b extends to connect with the rubber reduction groove 21a; a third reinforcement portion 26 is provided on the rear side surface of the back wall 21 at a position corresponding to the bottom end of the elongated groove 21b.

[0068] The third reinforcing portion 26 serves as a reinforcement structure for strengthening the structural strength of the back wall 21 at the location corresponding to the bottom end of the elongated groove 21b. The specific form of the third reinforcing portion 26 is not limited here, and designers can reasonably design it according to actual needs. For example, the third reinforcing portion 26 can include, but is not limited to, a physical structure such as a reinforcing rib provided at the rear side surface of the back wall 21 at the location corresponding to the bottom end of the elongated groove 21b. For another example, the third reinforcing portion 26 can also include, but is not limited to, a virtual structure such as a reinforcing groove formed at the rear side surface of the back wall 21 at the location corresponding to the bottom end of the elongated groove 21b.

[0069] By designing a third reinforcement portion 26 on the rear side surface of the back wall 21 corresponding to the bottom end of the long strip groove 21b, the third reinforcement portion 26 can, on the one hand, strengthen the structural strength of the back wall 21 at the position where the bottom end of the long strip groove 21b is located. On the other hand, the third reinforcement portion 26 can assist in strengthening the structural strength of the position where the bottom end of the back wall 21 and the glue reduction groove 21a corresponding to the connecting hook 23 are located, making the position where the bottom end of the back wall 21 and the glue reduction groove 21a corresponding to the connecting hook 23 less likely to deform or break, thereby effectively ensuring the safety of the child safety seat 1.

[0070] Specifically, the third reinforcement portion 26 includes a third reinforcement rib 261 protruding from the rear side of the back wall 21. The third reinforcement rib 261 is integrally formed via injection molding onto the rear side of the back wall 21 at a position corresponding to the bottom end of the elongated groove 21b. The thickness of the third reinforcement rib 261 is greater than or equal to 1.0 mm and less than or equal to 2.0 mm. For example, the thickness of the third reinforcement rib 261 can be, but is not limited to, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2.0 mm. By designing a third reinforcing rib 261 on the rear side surface of the back wall 21 corresponding to the bottom end of the long strip groove 21b, the third reinforcing rib 261 can, on the one hand, strengthen the structural strength of the back wall 21 at the position where the bottom end of the long strip groove 21b is located. On the other hand, the third reinforcing rib 261 can assist in strengthening the structural strength of the position where the bottom end of the back wall 21 and the glue reduction groove 21a corresponding to the connecting hook 23 are located, making the position where the bottom end of the back wall 21 and the glue reduction groove 21a corresponding to the connecting hook 23 less likely to deform or break, thereby effectively ensuring the safety of the child safety seat 1.

[0071] like Figure 8-Figure 9 As shown, the back wall 21 includes a first wall 211 and a second wall 212 disposed around the first wall 211. The bottom side of the first wall 211 is connected to the second wall 212, and a gap is formed between the first wall 211 and the second wall 212 on both sides in the left-right direction of the child safety seat 1. The back wall 21 also includes a connecting rib 213, which is at least partially located within the gap and connects the first wall 211 and the second wall 212. The connection between the connecting rib 213 and the first wall 211 is a circular arc transition, and / or the connection between the connecting rib 213 and the second wall 212 is a circular arc transition.

[0072] The first wall 211, the second wall 212, and the connecting rib 213 are integrally formed by injection molding. The rounded angle at the connection between the connecting rib 213 and the first wall 211 can be greater than or equal to 1.0 mm and less than or equal to 2.0 mm. For example, the rounded angle at the connection between the connecting rib 213 and the first wall 211 can be, but is not limited to, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2.0 mm, etc. Preferably, the rounded angle at the connection between the connecting rib 213 and the first wall 211 is 1.5 mm. The rounded angle at the connection between the connecting rib 213 and the second wall 212 can be greater than or equal to 1.0 mm and less than or equal to 2.0 mm. For example, the R angle at the connection between the connecting rib 213 and the second wall 212 can be, but is not limited to, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2.0 mm, etc. Preferably, the R angle at the connection between the connecting rib 213 and the second wall 212 is 1.5 mm.

[0073] By designing a circular arc transition at the connection between the connecting rib 213 and the first wall 211, the load is not concentrated on the corners of the connecting rib 213, and the load is dispersed. This makes the connecting rib 213 between the first wall 211 and the second wall 212 less likely to deform or break, thereby ensuring the stability of the connection between the first wall 211 and the second wall 212. By designing a circular arc transition at the connection between the connecting rib 213 and the second wall 212, the load is not concentrated on the corners of the connecting rib 213, and the load is dispersed. This makes the connecting rib 213 between the first wall 211 and the second wall 212 less likely to deform or break, thereby ensuring the stability of the connection between the first wall 211 and the second wall 212.

[0074] like Figure 10-11As shown, the child safety seat 1 also includes a headrest plate 31 and a shoulder strap guard webbing (not shown in the figure); the headrest plate 31 is movably connected to the backrest 20, and the headrest plate 31 has a first through-hole 31a, a fixing hole 31b and a second through-hole 31c arranged in sequence from top to bottom along the up-down direction of the child safety seat 1, a fourth reinforcement portion 32 is provided at a position adjacent to the fixing hole 31b of the headrest plate 31, and a fifth reinforcement portion 33 is provided at a position adjacent to the second through-hole 31c of the headrest plate 31; the end portions of the shoulder strap guard webbing are passed through the first through-hole 31a and the second through-hole 31c and are connected to the fixing hole 31b by fasteners.

[0075] The first through-hole 31 a and the second through-hole 31 c are holes on the headrest plate 31 for the ends of the shoulder belt guard webbing to pass through. The fixing hole 31b is a hole on the headrest plate 31 that is used to cooperate with a fastener (not shown in the figure) to achieve relative fixation of the position between the end of the shoulder strap guard plate webbing and the headrest plate 31; for example, when the fixing hole 31b is a threaded hole formed on the headrest plate 31, the fastener includes a screw, and at this time the end of the shoulder strap guard plate webbing is relatively fixed to the position between the headrest plate 31 by locking the screw; for another example, when the fixing hole 31b is a clamping hole formed on the headrest plate 31, the fastener includes a bayonet, and at this time the end of the shoulder strap guard plate webbing is relatively fixed to the position between the headrest plate 31 by clamping the bayonet; for another example, when the fixing hole 31b is a plug hole formed on the headrest plate 31, the fastener includes a pin, and at this time the end of the shoulder strap guard plate webbing is relatively fixed to the position between the headrest plate 31 by plugging the pin.

[0076] The fourth reinforcement portion 32 serves as a reinforcement structure to enhance the structural strength of the headrest plate 31 at the location corresponding to the fixing hole 31b. The specific form of the fourth reinforcement portion 32 is not limited here, and designers can reasonably design it according to actual needs. For example, the fourth reinforcement portion 32 may include, but is not limited to, a physical structure such as a reinforcing rib disposed at the location corresponding to the fixing hole 31b of the headrest plate 31. Alternatively, the fourth reinforcement portion 32 may include, but is not limited to, a virtual structure such as a reinforcing groove formed at the location corresponding to the fixing hole 31b of the headrest plate 31.

[0077] The fifth reinforcement portion 33 serves as a reinforcement structure to strengthen the headrest plate 31 at the location corresponding to the second through-hole 31c. The specific form of the fifth reinforcement portion 33 is not limited here, and designers can reasonably design it according to actual needs. For example, the fifth reinforcement portion 33 may include, but is not limited to, a physical structure such as a reinforcing rib disposed at the location corresponding to the second through-hole 31c of the headrest plate 31. Alternatively, the fifth reinforcement portion 33 may include, but is not limited to, a virtual structure such as a reinforcing groove formed at the location corresponding to the second through-hole 31c of the headrest plate 31.

[0078] By designing first and second perforations 31a and 31c for inserting the ends of the shoulder guard webbing, and by designing fasteners that cooperate with fixing holes 31b to secure the ends of the shoulder guard webbing relative to the headrest 31, the structure is simple and easy to implement. By designing a fourth reinforcement portion 32 at the location of the headrest 31 corresponding to the fixing hole 31b, the fourth reinforcement portion 32 strengthens the structural strength of the headrest 31 at the location of the fixing hole 31b, thereby ensuring the stability of the connection between the ends of the shoulder guard webbing and the headrest 31. By designing a fifth reinforcement portion 33 at the location of the headrest 31 corresponding to the second perforation 31c, the fifth reinforcement portion 33 strengthens the structural strength of the headrest 31 at the location of the second perforation 31c, thereby ensuring the stability of the connection between the ends of the shoulder guard webbing and the headrest 31.

[0079] Specifically, the specific forms of the fourth reinforcement portion 32 and the fifth reinforcement portion 33 may be, but are not limited to, one or more of the following embodiments.

[0080] like Figure 11 As shown, in the first embodiment, the fourth reinforcement portion 32 includes a fourth reinforcement rib 321, which is arranged along the edge of the fixing hole 31b and connected to the headrest plate 31. The fourth reinforcement rib 321 is integrally formed with the headrest plate 31 by injection molding. The fourth reinforcement rib 321 can be, but is not limited to, a block-shaped structure or a ring-shaped structure. For example, when the fourth reinforcement rib 321 is a block-shaped structure, there are multiple fourth reinforcement ribs 321, and the multiple fourth reinforcement ribs 321 are spaced apart along the edge of the fixing hole 31b. For another example, when the fourth reinforcement rib 321 is a ring-shaped structure, if there is only one fourth reinforcement rib 321, the single fourth reinforcement rib 321 is arranged along the edge of the fixing hole 31b in a circle. If there are multiple fourth reinforcement ribs 321, the multiple fourth reinforcement ribs 321 are arranged along the edge of the fixing hole 31b in multiple circles. By designing a fourth reinforcing rib 321 along the edge of the fixing hole 31b, the fourth reinforcing rib 321 can enhance the structural strength of the headrest plate 31 at the edge of the fixing hole 31b. On the one hand, this can enhance the structural strength of the headrest plate 31 at the position where the fixing hole 31b is located to ensure the connection stability between the end of the shoulder strap guard webbing and the headrest plate 31. On the other hand, this can effectively reduce the possibility of deformation or breakage of the headrest plate 31 near the fixing hole 31b due to excessive force during the connection process between the fastener and the fixing hole 31b.

[0081] like Figure 11As shown, in the second embodiment, the fourth reinforcement portion 32 includes a fifth reinforcement rib 322. The fifth reinforcement rib 322 is radially disposed on either side of the fixing hole 31b and connected to the headrest plate 31. The fifth reinforcement rib 322 may be, but is not limited to, a long strip-shaped structure. The fifth reinforcement rib 322 is integrally formed with the headrest plate 31 through injection molding. The design of the fifth reinforcement rib 322 not only strengthens the structural strength of the headrest plate 31 at the location corresponding to the fixing hole 31b, but also strengthens the structural strength of the headrest plate 31 near the fixing hole 31b, thereby ensuring the stability of the connection between the end of the shoulder strap guard webbing and the headrest plate 31.

[0082] like Figure 11 As shown, in the third embodiment, the fifth reinforcement portion 33 includes a sixth reinforcement rib 331, which is arranged along the edge of the second through-hole 31c and connected to the headrest plate 31. The sixth reinforcement rib 331 is integrally formed with the headrest plate 31 by injection molding. The sixth reinforcement rib 331 can be, but is not limited to, a block-shaped structure or a ring-shaped structure. For example, when the sixth reinforcement rib 331 is a block-shaped structure, there are multiple sixth reinforcement ribs 331, and the multiple sixth reinforcement ribs 331 are spaced apart along the edge of the second through-hole 31c. For another example, when the sixth reinforcement rib 331 is a ring-shaped structure, if there is only one sixth reinforcement rib 331, the single sixth reinforcement rib 331 is arranged along the edge of the second through-hole 31c in a circle. If there are multiple sixth reinforcement ribs 331, the multiple sixth reinforcement ribs 331 are arranged along the edge of the second through-hole 31c in multiple circles. By designing a sixth reinforcing rib 331 along the edge of the second through-hole 31c, the sixth reinforcing rib 331 can enhance the structural strength of the headrest plate 31 at the edge of the second through-hole 31c. This can strengthen the structural strength of the headrest plate 31 at the position corresponding to the second through-hole 31c, thereby effectively reducing the possibility of deformation or breakage of the headrest plate 31 near the second through-hole 31c due to excessive squeezing pressure of the shoulder strap guard webbing on the headrest plate 31.

[0083] like Figure 11 As shown, in the fourth embodiment, the fifth reinforcement portion 33 includes a seventh reinforcement rib 332, which is arranged on both sides of the second through-hole 31c along the radial direction of the fixing hole 31b and is connected to the headrest plate 31. The seventh reinforcement rib 332 can be, but is not limited to, a long strip-shaped structure, and the seventh reinforcement rib 332 is integrally formed with the headrest plate 31 by injection molding. By designing the seventh reinforcement rib 332, the seventh reinforcement rib 332 can not only strengthen the structural strength of the headrest plate 31 at the position corresponding to the second through-hole 31c, but also strengthen the structural strength of the headrest plate 31 near the second through-hole 31c, so as to effectively reduce the possibility of deformation or breakage of the headrest plate 31 near the second through-hole 31c due to excessive squeezing force of the shoulder strap guard webbing on the headrest plate 31.

[0084] like Figure 12-14 As shown, the child safety seat 1 further includes an adjustment handle 41 and a spring 50. The adjustment handle 41 is movably connected to the headrest 31 and is provided with a lower stop protrusion 42. The headrest 31 is provided with an upper stop protrusion 34. The bottom end of the spring 50 is sleeved on the lower stop protrusion 42, and the top end of the spring 50 abuts the upper stop protrusion 34. The projection of the spring 50 on the abutting surface of the upper stop protrusion 34 (i.e., the surface of the upper stop protrusion 34 that abuts the top end of the spring 50) completely falls within the abutting surface of the upper stop protrusion 34. The lower stop protrusion 42 is integrally formed with the adjustment handle 41 by injection molding, and the upper stop protrusion 34 is also integrally formed with the headrest 31 by injection molding. This facilitates assembly between the bottom end of the spring 50 and the lower stop protrusion 42, and between the top end of the spring 50 and the upper stop protrusion 34.

[0085] It should be noted that, under the action of an external force, the adjustment handle 41 can be moved from bottom to top relative to the headrest 31 along the vertical direction of the child safety seat 1 until the lock of the adjustment handle 41 disengages the lock hole of the backrest 20. At this point, the headrest 31 can be adjusted relative to the backrest 20 along the vertical direction of the child safety seat 1. The user can then adjust the headrest 31 to a suitable height to support the child's head according to actual needs. When the adjustment handle 41 moves from bottom to top relative to the headrest 31 along the vertical direction of the child safety seat 1, the spring 50 is compressed and elastically deformed along the vertical direction of the child safety seat. Subsequently, the adjustment handle 41, under the action of the elastic restoring force corresponding to the elastic deformation of the spring 50, can move from top to bottom relative to the headrest 31 along the vertical direction of the child safety seat 1 until the lock of the adjustment handle 41 locks with the lock hole of the backrest 20. At this point, the headrest 31 is positioned against the backrest 20.

[0086] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0087] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A child safety seat, characterized in that: include: A base assembly, comprising a base and a connecting shaft connected to the base; The backrest includes a back wall, side wing walls and a connecting hook. The side wing walls are bent along the left and right directions of the child safety seat and are connected to both sides of the back wall. The connecting hook is connected to the bottom side of the back wall, and the connecting hook is buckled to the radial outer periphery of the connecting shaft. A first reinforcement portion is provided at the bottom end of the back wall adjacent to the corner, and a second reinforcement portion is provided at the bottom end of the back wall corresponding to the connecting hook.

2. The child safety seat according to claim 1, wherein: The first reinforcement portion includes a reinforcement groove recessed from the front side of the back wall; and / or The first reinforcement portion includes a first reinforcement rib protruding from the rear side of the back wall; and / or The bottom end of the back wall is bent from the front of the child safety seat to the rear of the child safety seat at a position corresponding to the connecting hook to form a glue reduction groove, and the second reinforcement portion includes a second reinforcement rib located in the glue reduction groove and connected to the groove wall surface of the glue reduction groove.

3. The child safety seat according to claim 2, wherein: The bottom surface of the reinforcement groove and the side surface of the reinforcement groove are in arc transition; and / or The groove side surface of the reinforcement groove and the front side surface of the back wall are transitioned into an arc shape.

4. The child safety seat according to claim 1, wherein: The bottom end of the back wall corresponding to the connecting hook is bent from the front of the child safety seat to the rear of the child safety seat to form a glue reduction groove; the connection between the back wall above the glue reduction groove and the groove wall of the glue reduction groove is an arc transition.

5. The child safety seat according to claim 4, wherein: The back wall is bent from the front of the child safety seat to the rear of the child safety seat to form an elongated groove, the elongated groove extends in the up and down directions of the child safety seat, and the bottom end of the elongated groove extends to connect with the rubber reduction groove; a third reinforcement portion is provided on the rear side surface of the back wall corresponding to the bottom end of the elongated groove.

6. The child safety seat according to claim 5, wherein: The third reinforcement portion includes a third reinforcement rib protruding from the rear side surface of the back wall.

7. The child safety seat according to claim 1, wherein: The back wall includes a first wall and a second wall disposed around the first wall, wherein a bottom side of the first wall is connected to the second wall, and a gap is formed between the first wall and the second wall along both sides in the left-right direction of the child safety seat; The back wall also includes a connecting rib, which is at least partially located in the gap and connected to the first wall and the second wall; the connection between the connecting rib and the first wall is an arc transition, and / or the connection between the connecting rib and the second wall is an arc transition.

8. The child safety seat according to any one of claims 1 to 7, characterized in that: Also includes: a headrest plate movably connected to the backrest, having a first through-hole, a fixing hole, and a second through-hole arranged in sequence from top to bottom along the vertical direction of the child safety seat, a fourth reinforcement portion being provided on the headrest plate adjacent to the fixing hole, and a fifth reinforcement portion being provided on the headrest plate adjacent to the second through-hole; The shoulder strap guard webbing has an end portion provided with the first through-hole and the second through-hole and connected to the fixing hole via a fastener.

9. The child safety seat according to claim 8, wherein: The fourth reinforcement portion includes a fourth reinforcement rib, the fourth reinforcement rib is arranged along the edge of the fixing hole and is connected to the headrest plate; and / or The fourth reinforcement portion includes a fifth reinforcement rib, the fifth reinforcement rib is provided on both sides of the fixing hole along the radial direction of the fixing hole and is connected to the headrest plate; and / or The fifth reinforcement portion includes a sixth reinforcement rib, the sixth reinforcement rib is provided along the edge of the second through-hole and connected to the headrest plate; and / or The fifth reinforcement portion includes a seventh reinforcement rib, which is arranged on both sides of the second through-hole along a radial direction of the second through-hole and is connected to the headrest plate.

10. The child safety seat according to claim 8, wherein: The child safety seat also includes an adjustment handle and a spring. The adjustment handle is movably connected to the headrest plate. The adjustment handle is provided with a lower stop protrusion, and the headrest plate is provided with an upper stop protrusion. The bottom end of the spring is sleeved on the lower stop protrusion, and the top end of the spring abuts against the upper stop protrusion, and the projection of the spring on the abutting surface of the upper stop protrusion completely falls within the abutting surface of the upper stop protrusion.

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