Child safety seat with rotatable side wings of the headrest assembly

Abstract

The present invention discloses a child safety seat with rotatable side wings of a headrest assembly, which includes an intermediate backboard and side wings located on both sides of the intermediate backboard, and the two are connected by a rotating assembly. The rotating assembly includes a first connection assembly connected to the intermediate backboard and a second connection assembly connected to the side wings. The first connection assembly includes an upper connection arm and an upper rotating cylinder fixed to the intermediate backboard. The second connection assembly includes a lower connection arm and a lower rotating cylinder fixed to the side wings. An upper gear disc is arranged in the upper rotating cylinder, and a lower gear disc is arranged in the lower rotating cylinder. A rotating shaft sequentially passes through the upper rotating cylinder, the upper gear disc, the lower gear disc and the lower rotating cylinder. Rotate the side wing to drive the lower rotating cylinder to drive the lower gear disc to rotate. There is a slope transition between the teeth of the rotating lower gear disc and the upper gear disc. When the lower gear disc rotates to the next tooth position of the upper gear disc, the gear position switching of the side wing is completed. The headrest assembly with the above structure can make the side wing rotate conveniently while ensuring the stability and reliability of each gear position state of the side wing.

Description

Technical Field

[0001] The present invention relates to a child safety seat, and more particularly to a headrest assembly in which two side wing guards are rotatable to accommodate children of different sizes sitting in the child safety seat. Background Art

[0002] An automobile child safety seat, also known as a child restraint system CRS (Child Restraint System), is a seat designed for children of different ages (or weights), installed in an automobile, and capable of effectively improving the safety of children when riding in the vehicle.

[0003] A child safety seat is usually placed on the rear seat of an automobile and fixed to the seat with a seat belt.

[0004] A headrest and seat body connection mechanism and a child safety seat with the publication number CN210502390U disclose a seat body and a headrest, and the headrest is located inside the seat body.

[0005] A headrest assembly with the application publication number CN111845486A includes an intermediate backboard and side wing guards located on both sides of the intermediate backboard. The side wing guards are pivotally connected to the side of the backboard so that the side wing guards can rotate relative to the backboard with a limited range. At least one first pivot connection portion for the pivot shaft to pass through is provided on the backboard, and at least one second pivot connection portion for the pivot shaft to pass through is provided on the side wing guard. The pivot shaft sequentially passes through the first pivot connection portion and the second pivot connection portion. There is a certain damping between the outer wall of the pivot shaft and the through holes of the first pivot connection portion and the second pivot connection portion, and this damping can position the intermediate backboard and the side wing guards between the maximum angle and the minimum angle, so as to accommodate children of different body types sitting in the child safety seat.

[0006] For the above headrest assembly, the rotation range of the side wing guards and the intermediate backboard is limited by the frictional force between the pivot shaft and the shaft hole, and the positioning reliability of the side wing guards is insufficient. Summary of the Invention

[0007] In view of the problem of insufficient positioning reliability of the side wing guards in the prior art, the present invention aims to provide a headrest assembly with good positioning reliability of the side wing guards, and further provides a child safety seat with the above headrest assembly.

[0008] A child safety seat with rotatable side wing guards of a headrest assembly, characterized by including an intermediate backboard and side wing guards located on both sides of the intermediate backboard,

[0009] The intermediate backboard and the side wing guards are connected by a rotating assembly;

[0010] The rotating assembly includes a first connection assembly connected to the intermediate backboard and a second connection assembly connected to the side wing guards;

[0011] The first connecting component includes an upper connecting arm and an upper rotating cylinder fixed to the middle back plate, and the second connecting component includes a lower connecting arm and a lower rotating cylinder fixed to the side wing;

[0012] An upper gear disk that is restricted in rotation but can move up and down is provided inside the upper rotating cylinder, a lower gear disk that is restricted in rotation is provided inside the lower rotating cylinder, and a pressing spring is provided inside the upper rotating cylinder to press the upper gear disk to engage with the lower gear disk;

[0013] The upper rotating cylinder and the lower rotating cylinder are connected by a rotating shaft; the rotating shaft passes through the upper gear disk, the lower gear disk, and the pressing spring at the same time;

[0014] When the side wing is rotated, the lower rotating cylinder drives the lower gear disk to rotate. The lower gear disk cooperates with the inclined surface on the upper gear disk, causing the upper gear disk to move towards the spring direction and compress the spring. When the lower gear disk overcomes the tension of the spring and rotates to the next tooth position of the upper gear disk, the gear shifting of the side wing is completed.

[0015] A preferred technical solution of the present invention is that a plurality of positioning holes are provided at the bottom of the lower rotating cylinder, and positioning protrusions that are inserted into the positioning holes are provided at the bottom of the lower gear disk to limit the rotation of the lower gear disk relative to the lower rotating cylinder. A lower annular tooth is provided on the upper end surface of the lower gear disk.

[0016] A preferred technical solution of the present invention is that a plurality of positioning grooves are provided on the side wall of the upper rotating cylinder, and positioning ribs that can be inserted into the positioning grooves are provided on the side wall of the upper gear disk to limit the rotation of the upper gear disk relative to the upper rotating cylinder. An upper annular tooth that cooperates with the lower annular tooth is provided on the lower end surface of the upper gear disk.

[0017] A preferred technical solution of the present invention is that a rotation amplitude limiting structure is provided on the opposite surfaces of the upper gear disk and the lower gear disk to limit the rotation amplitude of the side wing.

[0018] A preferred technical solution of the present invention is that the rotation amplitude limiting structure includes upper arc-shaped ribs provided on the upper gear disk and lower arc-shaped ribs provided on the lower gear disk;

[0019] The upper arc-shaped ribs are located inside the upper annular tooth, and the lower arc-shaped ribs are located inside the lower annular tooth.

[0020] After the upper annular tooth of the upper gear disk meshes with the lower annular tooth of the lower gear disk, the upper arc-shaped ribs and the lower arc-shaped ribs are on the same circumference and are spaced apart by an arc-shaped gap, and the arc-shaped gap is the adjustable rotation amplitude of the side wing.

[0021] A preferred technical solution of the present invention is that the upper arc-shaped ribs extend downward beyond the upper annular tooth and then extend into the inside of the lower annular tooth to cooperate with the lower arc-shaped ribs.

[0022] The preferred technical solution of the present invention is as follows: a first spring seat is provided at the bottom of the upper rotating cylinder, a second spring seat is provided between the back surfaces of the upper tooth discs, and the spring is located within the first spring seat and the second spring seat.

[0023] The preferred technical solution of the present invention is as follows: two first screw holes are provided on the upper connecting arm, and two second screw holes are provided on the lower connecting arm.

[0024] The preferred technical solution of the present invention is as follows: after the upper tooth disc meshes with the lower tooth disc, the outer walls of the upper and lower tooth discs form a flat and continuous outer wall.

[0025] The preferred technical solution of the present invention is as follows: the thickness of the upper tooth disc is greater than the thickness of the lower tooth disc.

[0026] Compared with the prior art, the advantages of the present invention are that the side wing of the headrest assembly can rotate relative to the middle backboard through the rotating assembly. The upper rotating cylinder of the rotating assembly is provided with an upper tooth disc with restricted rotation, and the lower rotating cylinder is provided with a lower tooth disc with restricted rotation. A rotating shaft sequentially passes through the upper rotating cylinder, the upper tooth disc, the lower tooth disc, and the lower rotating cylinder; rotating the side wing can drive the lower rotating cylinder to drive the lower tooth disc to rotate. There is an inclined transition between the rotating lower tooth disc and the tooth part of the upper tooth disc. When the lower tooth disc rotates to the next tooth position of the upper tooth disc, the gear shift of the side wing is completed; the headrest assembly with the above structure can make the side wing rotate conveniently while ensuring the stability and reliability of each gear state of the side wing.

[0027] And under the action of the pressing spring, after the lower tooth disc presses the upper tooth disc upward, it can reset under the resilience of the pressing spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of a child safety seat;

[0029] Figure 2 is a schematic diagram of the structure of the headrest assembly in the unfolded state;

[0030] Figure 3 is a schematic diagram of the structure of the headrest assembly in the retracted state;

[0031] Figure 4 is a schematic diagram of the back structure of the headrest assembly;

[0032] Figure 5 is a schematic diagram of the overall structure of the rotating assembly;

[0033] Figure 6 is an assembly diagram of the upper rotating cylinder and the upper tooth disc;

[0034] Figure 7 is an assembly diagram of the lower rotating cylinder and the lower tooth disc;

[0035] Figure 8Schematic diagram of the structure of the upper rotating cylinder and the upper toothed disk;

[0036] Figure 9 Schematic diagram of the structure of the lower rotating cylinder and the lower toothed disk;

[0037] Figure 10 Side view of the disassembled structure of the rotating assembly;

[0038] Figure 11 Schematic diagram of the internal structure of the rotating assembly;

[0039] Figure 12 Assembly schematic diagram of the upper and lower toothed disks. Detailed implementation mode

[0040] The present invention will be further described in detail below in conjunction with the embodiments with reference to the drawings.

[0041] The preferred embodiments of the present invention will be described in detail below with reference to the drawings. Those skilled in the art will understand that these descriptions are only descriptive and exemplary, and should not be construed as limiting the protection scope of the present invention.

[0042] It should be noted that: similar reference numerals represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it may not be further defined and explained in subsequent drawings.

[0043] The child safety seat 100 includes a seat body 101 and a headrest assembly 102 with rotatable side wings.

[0044] The headrest assembly 102 with rotatable side wings includes an intermediate backrest 10 and side wings 20 located on both sides of the intermediate backrest 10. The intermediate backrest 10 and the side wings 20 are connected by a rotating assembly 30. The rotating assembly 30 includes a first connecting assembly 3a connected to the intermediate backrest 10 and a second connecting assembly 3b connected to the side wings. The first connecting assembly 3a includes an upper connecting arm a1 fixed to the intermediate backrest 10 and an upper rotating cylinder a2. The second connecting assembly 3b includes a lower connecting arm b1 fixed to the side wing 20 and a lower rotating cylinder b2. An upper toothed disk 41 with restricted rotation is provided inside the upper rotating cylinder a2, and a lower toothed disk 42 with restricted rotation is provided inside the lower rotating cylinder b2. A rotating shaft 50 sequentially passes through the upper rotating cylinder a2, the upper toothed disk 41, the lower toothed disk 42, and the lower rotating cylinder b2. When the side wing 20 is rotated to drive the lower rotating cylinder b2 to drive the lower toothed disk 42 to rotate, the rotating lower toothed disk 42 and the tooth portion 43 of the upper toothed disk 41 are in transition through an inclined surface f. When the lower toothed disk 42 rotates to the next tooth position v of the upper toothed disk 41, the gear shift of the side wing 20 is completed.

[0045] The advantages of the present invention are as follows. The side wings 20 of the headrest assembly 102 can rotate relative to the middle back plate 10 through the rotating assembly 30. An upper toothed disc 41 with restricted rotation is provided in the upper rotating cylinder a2 of the rotating assembly 30, and a lower toothed disc 42 with restricted rotation is provided in the lower rotating cylinder b2. Moreover, the upper rotating cylinder a2, the upper toothed disc 41, the lower toothed disc 42, and the lower rotating cylinder b2 are connected by a rotating shaft 50. Rotating the side wing 20 can drive the lower rotating cylinder b2 to drive the lower toothed disc 42 to rotate. During the rotation of the lower toothed disc 42, there is an inclined surface f between the tooth parts 43 of the lower toothed disc 42 and the upper toothed disc 41. The inclined surface f can make the mutual extrusion between the tooth parts 43 of the upper and lower toothed discs more smooth during the transition. When the lower toothed disc 42 rotates to the next tooth position v of the upper toothed disc 41, the gear position switching of the side wing 20 is completed. The headrest assembly 102 with the above structure can make the rotation of the side wing 20 convenient while ensuring the stability and reliability of each gear position state of the side wing 20.

[0046] The upper toothed disc 41 can move up and down in the upper rotating cylinder a2. In order to enable the small toothed disc 41 to automatically reset when being extruded by the lower toothed disc 42, a pressing spring 60 is arranged between the upper rotating cylinder a2 and the upper toothed disc 41.

[0047] In the initial state, the pressing spring 60 will press the upper toothed disc 41 to engage with the lower toothed disc 42. When switching the state, when the lower toothed disc 42 rotates in cooperation with the upper toothed disc 41 through the inclined surface f, the lower toothed disc 42 will push the upper toothed disc 41 and compress the pressing spring 60. After the gear position switching is completed, the upper toothed disc 41 will reset under the action of the resilience of the pressing spring 60 to always maintain the meshing state with the lower toothed disc 42.

[0048] It should be noted that during the mutual extrusion and relative rotation process between the above toothed discs, mainly the tooth parts 43 meshing between the two toothed discs are mutually extruded and rotated and transitioned through the inclined surface f on the side of the tooth parts 43.

[0049] For the rotation limiting structure between the toothed disc and the rotating cylinder, multiple positioning holes 2b are provided at the bottom of the lower rotating cylinder b2, and positioning protrusions 1b inserted into the positioning holes 2b are provided at the bottom of the lower toothed disc 42 to limit the rotation of the lower toothed disc 42 relative to the lower rotating cylinder b2. A lower annular tooth n2 is provided on the upper end surface of the lower toothed disc 42.

[0050] Multiple positioning grooves 2a are provided on the side wall of the upper rotating cylinder a2, and positioning ribs 1a that can be inserted into the positioning grooves 2a are provided on the side wall of the upper toothed disc 41 to limit the rotation of the upper toothed disc 41 relative to the upper rotating cylinder a2. An upper annular tooth n1 that cooperates with the lower annular tooth n2 is provided on the lower end surface of the upper toothed disc 41. It should be noted that the positioning groove 2a only limits the rotation of the positioning rib 1a and does not limit the up and down movement of the positioning rib 1a in the positioning groove 2a. Therefore, at this time, the positioning groove 2a also functions as a guide for the positioning rib 1a to make the up and down movement of the upper toothed disc 41 more stable and accurate when being extruded in the upper rotating cylinder a2.

[0051] The upper and lower annular teeth are composed of a number of tooth parts 43 evenly distributed in a ring. After the upper and lower annular teeth are engaged, the outer walls of the upper and lower tooth discs form a flat and continuous outer wall.

[0052] In addition, the relative rotation amplitude between the two tooth discs also needs to be limited. Specifically, a rotation amplitude limiting structure 70 is provided on the relative surfaces of the upper tooth disc 41 and the lower tooth disc 42 to limit the rotation amplitude of the side guard wing 20.

[0053] Preferably, as Figures 6 to 7 shown, the rotation amplitude limiting structure 70 includes an upper arc-shaped rib 71 provided on the upper tooth disc 41 and a lower arc-shaped rib 72 provided on the lower tooth disc 42; the upper arc-shaped rib 71 is located inside the upper annular tooth n1, and the lower arc-shaped rib 72 is located inside the lower annular tooth n2.

[0054] As Figure 12 shown, after the upper annular tooth n1 of the upper tooth disc 41 is engaged with the lower annular tooth n2 of the lower tooth disc 42, the upper arc-shaped rib 71 and the lower arc-shaped rib 72 are on the same circumference and are separated by an arc-shaped gap 73, and the arc-shaped gap 73 is the adjustable rotation amplitude of the side guard wing 20.

[0055] The upper arc-shaped rib 71 extends downward beyond the upper annular tooth n1 and then extends into the inside of the lower annular tooth 72 and cooperates with the lower arc-shaped rib 72.

[0056] Regarding the installation structure of the pressing spring 60, as Figure 11 shown, a first spring seat k1 is provided at the bottom of the upper rotating cylinder a2, a second spring seat k2 is provided between the back surfaces of the upper tooth disc 41, and the pressing spring 60 is located inside the first spring seat k1 and the second spring seat k2.

[0057] Two first screw holes p1 are provided on the upper connecting arm a1, and two second screw holes p2 are provided on the lower connecting arm b1. The first connecting component 3a is installed on the middle back plate 10 through the first screw holes p1, and the second connecting component 3b is installed on the side guard wing 20 through the second screw holes p2.

[0058] Preferably, the thickness of the upper tooth disc 41 is greater than the thickness of the lower tooth disc 42. The upper tooth disc 41 is connected to the first connecting component 3a and is relatively fixed, while the lower tooth disc 42 is connected to the second connecting component 3b and needs to rotate back and forth relative to the upper tooth disc 41. Therefore, the lower tooth disc 42 that needs to move is set to be relatively thin for easy back-and-forth rotation, and the relatively fixed upper tooth disc 41 is set to be relatively thick to withstand the back-and-forth extrusion of the lower tooth disc 42.

[0059] The present invention aims to illustrate that the side wing 20 of the headrest assembly 102 can rotate relative to the middle backboard 10 through the rotating assembly 30. The upper rotating cylinder a2 of the rotating assembly 30 is provided with an upper tooth disc 41 with limited rotation, and the lower rotating cylinder b2 is provided with a lower tooth disc 42 with limited rotation. Moreover, the upper rotating cylinder a2, the upper tooth disc 41, the lower tooth disc 42 and the lower rotating cylinder b2 are connected by a rotating shaft 50. Rotating the side wing 20 can drive the lower rotating cylinder b2 to drive the lower tooth disc 42 to rotate. The rotating lower tooth disc 42 and the tooth part 43 of the upper tooth disc 41 are transitioned by an inclined plane f. The inclined plane f can make the mutual extrusion transition between the tooth parts 43 of the upper and lower tooth discs smoother. When the lower tooth disc 42 rotates to the next tooth position v of the upper tooth disc 41, the gear shift of the side wing 20 is completed. The headrest assembly 102 with the above structure can make the side wing 20 rotate conveniently while ensuring the stability and reliability of each gear state of the side wing 20.

[0060] The above has introduced in detail the headrest assembly with rotatable side wings and the child safety seat provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the present invention and its core idea. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A child safety seat with rotatable side wings of a headrest assembly, characterized in that It includes a middle back plate and side wing protectors located on both sides of the middle back plate. The middle back plate and the side wing protectors are connected by a rotating assembly. The rotating assembly includes a first connection assembly connected to the middle back plate and a second connection assembly connected to the side wing protectors. The first connection assembly includes an upper connection arm and an upper rotating cylinder fixed to the middle back plate, and the second connection assembly includes a lower connection arm and a lower rotating cylinder fixed to the side wing protectors. An upper tooth disc that is rotationally restricted but can move up and down is provided inside the upper rotating cylinder, a lower tooth disc that is rotationally restricted is provided inside the lower rotating cylinder, and a top pressure spring is provided inside the upper rotating cylinder to press the upper tooth disc and the lower tooth disc into engagement. The upper rotating cylinder and the lower rotating cylinder are connected by a rotating shaft; the rotating shaft passes through the upper tooth disc, the lower tooth disc, and the top pressure spring at the same time. When the side wing protector is rotated, the lower rotating cylinder drives the lower tooth disc to rotate. The lower tooth disc cooperates with the inclined surface on the upper tooth disc, causing the upper tooth disc to move towards the top pressure spring and thus compress the top pressure spring. When the lower tooth disc overcomes the tension of the top pressure spring and rotates to the next tooth position of the upper tooth disc, the gear shifting of the side wing protector is completed. A plurality of positioning holes are provided at the bottom of the lower rotating cylinder, a positioning protrusion for inserting into the positioning holes is provided at the bottom of the lower tooth disc, and a lower annular tooth is provided on the upper end surface of the lower tooth disc. A plurality of positioning grooves are provided on the side wall of the upper rotating cylinder, a positioning rib that can be inserted into the positioning grooves is provided on the side wall of the upper tooth disc, and an upper annular tooth for cooperating with the lower annular tooth is provided on the lower end surface of the upper tooth disc. Upper arc-shaped rib strips are provided on the upper tooth disc, and lower arc-shaped rib strips are provided on the lower tooth disc; the upper arc-shaped rib strips are located inside the upper annular tooth, and the lower arc-shaped rib strips are located inside the lower annular tooth. After the upper annular tooth of the upper tooth disc and the lower annular tooth of the lower tooth disc are engaged with each other, the upper arc-shaped rib strips and the lower arc-shaped rib strips are on the same circumference and are separated by an arc-shaped space, and the arc-shaped space is the adjustable rotation range of the side wing protector.

2. The child safety seat with rotatable side wings of the headrest assembly according to claim 1, characterized in that The upper arc-shaped rib strip extends downward beyond the upper annular tooth and then extends into the inside of the lower annular tooth to cooperate with the lower arc-shaped rib strip.

3. The child safety seat with rotatable side wings of the headrest assembly according to claim 1, characterized in that A first spring seat is provided at the bottom of the upper rotating cylinder, a second spring seat is provided between the backs of the upper tooth discs, and the spring is located inside the first spring seat and the second spring seat.

4. The child safety seat with rotatable side wings of the headrest assembly according to claim 1, wherein Two first screw holes are provided on the upper connection arm, and two second screw holes are provided on the lower connection arm.

5. The child safety seat with rotatable side wings of the headrest assembly according to claim 1, wherein After the upper tooth disc and the lower tooth disc are engaged, the outer walls of the upper and lower tooth discs form a flat and continuous outer wall.

6. The child safety seat with a rotatable side wing of the headrest assembly according to claim 1, wherein The thickness of the upper tooth disc is greater than the thickness of the lower tooth disc.

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