Child safety seat

Abstract

The present application relates to a kind of child safety seats, including chair back and seat, chair back and seat are detachably connected, headrest is provided on chair back, headrest is provided with side wing on both sides, side wing is rotatably connected with chair back by pivot, the side wing opposite side is provided with slide rail, slide rail is spiral, headrest is provided with the slider that is matched with slide rail, the setting direction of slide rail is same with the setting direction of pivot.A kind of child safety seats obtained by the present application has the following advantages: the side wing is opened or shrunk by the up and down sliding of slider, the width adjustment of side wing is realized, to adapt to different users, so that the occupied space of linkage structure is smaller, more space can be left for other parts on chair back, simple structure, good reliability, production cost is also lower, detachable chair back and seat can be conveniently stored when idle, after chair back is detached, seat can be used as heightening pad, so that the use age range of seat is wider.

Description

TECHNICAL FIELD

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

[0002] The child safety seat is combined by a belt assembly or a flexible component with a safety buckle, an adjusting device, a connecting device and an auxiliary device (such as a portable baby bed, a baby carrying device, an auxiliary seat or a collision protection device), and is fixed to a motor vehicle through a self-mounting clamping device of the vehicle, so as to limit the body displacement of a child to reduce the harm to the child in an emergency (such as a collision or sudden deceleration).

[0003] In the prior art, most of the child seats have a fixed shape, and the base, backrest and headrest are connected to each other as a whole, and the whole or part of the seat cannot be folded to adapt to children of different sizes. A small part of the foldable seat can only be simply adjusted in distance by a guide groove, and the adjustment operation is relatively troublesome. SUMMARY

[0004] An object of the present application is to provide a child safety seat which can simultaneously adjust the headrest and the side wings.

[0005] Another object of the present application is to provide a child safety seat which has a simple structure and occupies a small space.

[0006] The technical scheme adopted by the present application is as follows: a child safety seat comprises a backrest and a seat, the backrest and the seat are detachably connected, the backrest is provided with a headrest which can move up and down, the headrest is provided with side wings on both sides, the side wings are rotatably connected to the backrest through a rotating shaft, one side of the side wings opposite to each other is provided with a slide rail, the slide rail is in a spiral shape, the headrest is provided with a sliding block matched with the slide rail, and the setting direction of the slide rail is the same as the setting direction of the rotating shaft.

[0007] Compared with the prior art, the advantages of the present application are as follows: the general linear track and the sliding block can only realize the linear motion of the sliding block, and the track is kept stationary. The spiral slide rail and the sliding block are matched, the slide rail can be driven by the sliding block when the sliding block moves up and down linearly, and the horizontal movement is generated. The horizontal movement is converted into rotation through the rotating shaft, and then the rotation of the side wings is realized, and the opening of the side wings is completed. The up and down movement of the sliding block is followed by the movement of the headrest, so that the headrest and the side wings are linked. The side wings are opened or contracted through the up and down sliding of the sliding block, the width of the side wings is adjusted, and different users are adapted. The space occupied by the linkage structure is small, more space can be left for other parts on the backrest, the structure is simple, the reliability is good, the production cost is lower, the detachable backrest and seat can be conveniently stored when not in use. After the backrest is detached, the seat can be used as a height-increasing pad, so that the age range of the seat is wider.

[0008] In some embodiments of the present application, the chair back is provided with inwardly recessed mounting grooves on both sides, and the rotating shaft is arranged on the mounting grooves; a gap is arranged between the side wings and the chair back; a chair back framework is arranged on the chair back, and one side of the chair back framework abuts against the side wall of the mounting groove; and a chair seat framework is arranged on the chair seat.

[0009] Further, a hollow inner cavity is arranged on the chair back, a gap is arranged on the top of the inner cavity, the gap is communicated with the outside, the headrest is arranged on the inner cavity through the gap, a through groove is arranged on the mounting groove and communicated with the inner cavity, and the slide rail is arranged on the inner cavity through the through groove, and the width of the through groove is greater than the width of the slide rail.

[0010] In some embodiments of the present application, the length direction of the rotating shaft extends along the length direction of the chair back; the rotating shaft is a metal piece; and the distance between the moving route of the slide rail and the headrest gradually increases from bottom to top.

[0011] Further, at least two transversely arranged fixing grooves are arranged on the chair back, the fixing grooves are communicated with the outside, a fixing shaft matched with the fixing grooves is arranged on the chair seat, and at least one first locking mechanism for clamping the fixing shaft is arranged on the chair back; the fixing grooves are arranged on the chair back framework, the fixing shaft is connected with the chair seat framework; the fixing grooves include a first fixing groove and a second fixing groove, the first fixing groove is transversely connected with the outside, the second fixing groove is communicated with the outside through a first inclined groove, and the inclined direction of the first inclined groove is on the same side as the opening direction of the first fixing groove.

[0012] Further, the first locking mechanism includes a mounting seat, a locking block and a latch, the locking block is rotationally connected with the mounting seat, the latch is slidingly connected with the mounting seat, a limiting groove and a blocking edge are arranged on the locking block, the latch abuts against the blocking edge in the fixed state of the fixing shaft, the second fixing groove and the limiting groove form a closed structure, and one side of the limiting groove is arranged on the second fixing groove in the unlocked state of the fixing shaft; a reset spring for resetting the locking block is arranged between the locking block and the mounting seat; the mounting seat is connected with the chair back framework; and an unlocking handle linked with the latch is arranged on the chair back.

[0013] Further, at least one downward guiding protrusion is arranged on the bottom of the chair back, and a guiding groove matched with the guiding protrusion is arranged on the chair seat; the fixing grooves are arranged on the guiding protrusions, and the fixing shafts are arranged on the guiding grooves; two guiding protrusions are arranged, and two guiding grooves are arranged in cooperation; the fixing shafts penetrate through the two guiding grooves; an upper channel is arranged on the chair back, and a lower channel is arranged on the chair seat, and the upper channel is communicated with the lower channel; the upper channel is arranged between the two guiding protrusions, the lower channel is arranged between the two guiding grooves, and the lower channel is arranged between the adjacent two fixing shafts.

[0014] Further, the headrest is provided with a second locking mechanism, the second locking mechanism is arranged on the back of the headrest, the headrest is provided with a shoulder strap hole, the second locking mechanism comprises a locking pin shaft and a plurality of gears of fixing plates, the locking pin shaft is arranged below the shoulder strap hole, the locking pin shaft is connected with the headrest, and the fixing plates are connected with the back of the chair; the fixing plates are connected with the chair back skeleton; the chair back skeleton is symmetrically arranged, and the two ends of the locking pin shaft are connected with the fixing plates on the two sides respectively; the cross section of the fixing plate is in a U shape, one side of the U shape is provided with a gear slot, and the other side is connected with the chair back skeleton.

[0015] Further, the chair seat is provided with a safety belt slot; the safety belt slot is arranged on the middle of the upper surface of the chair seat, a rotatable cover plate is arranged on the safety belt slot, symmetrical waist belt holes are arranged on the two sides of the safety belt slot, a crotch belt hole is arranged in front of the safety belt slot, a first reinforcing rod and a second reinforcing rod are arranged on the chair seat skeleton, the first reinforcing rod is arranged behind the waist belt hole, and the second reinforcing rod is arranged below the crotch belt hole; a rotatable upper cover plate is arranged on the back of the chair back; a rotatable lower cover plate is arranged on the back of the chair seat; binding holes are arranged on the two sides of the chair back; a containing cavity is arranged on the chair seat; and a rotatable side cover plate is arranged on the containing cavity.

[0016] Further, the chair seat is provided with a cup holder; the cup holder is arranged on the two sides of the chair seat; an arc-shaped recess is arranged on the chair seat; the cup holder is arranged on the arc-shaped recess; a positioning slot is arranged on the chair seat; a positioning block matched with the positioning slot is arranged on the cup holder; the positioning slot is communicated with the arc-shaped recess; a buckle slot is arranged on the cup holder; a buckle matched with the buckle slot is arranged on the chair seat; a button is arranged on the chair seat; the button is linked with the buckle; and the second locking mechanism comprises an unlocking slider, the unlocking slider is provided with a second inclined slot, the locking pin shaft is arranged in the second inclined slot, and one end of the unlocking slider is rotatably connected with the headrest. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of embodiment 1 of the present application;

[0018] Figure 2 is an exploded structural schematic view of the chair back of embodiment 1 of the present application;

[0019] Figure 3 is a front view of embodiment 1 of the present application;

[0020] Figure 4 is a structural schematic view of the side wing of embodiment 1 of the present application;

[0021] Figure 5 is Figure 3 a sectional view in the A-A direction of

[0022] Figure 6 is Figure 3 a sectional view in the B-B direction of

[0023] Figure 7is a structural schematic diagram of the structure of the cup holder and headrest of Embodiment 1 of the present application;

[0024] Figure 8 is a structural schematic diagram of the seat of Embodiment 1 of the present application;

[0025] Figure 9 is a structural schematic diagram of the backrest of Embodiment 1 of the present application;

[0026] Figure 10 is a sectional view of the backrest of Embodiment 1 of the present application;

[0027] Figure 11 is a structural schematic diagram of the latch blocking lock block of Embodiment 1 of the present application;

[0028] Figure 12 is a sectional view in the C-C direction in Figure 3

[0029] Figure 13 is a structural schematic diagram of the cup holder of Embodiment 1 of the present application;

[0030] Figure 14 is an enlarged view of the D portion in Figure 1

[0031] is an enlarged view of the E portion in Figure 15 Figure 5 is an enlarged view of the F portion in

[0032] Figure 16 Figure 6 is an enlarged view of the G portion in Figure 6

[0033] is an enlarged view of the H portion in Figure 17 Figure 7 is an enlarged view of the I portion in

[0034] Figure 18 Figure 9

[0035] Figure 19 Figure 10

[0036] ​​​​​​In the figure: 1, chair back; 2, chair seat; 3, headrest; 4, side wing; 5, rotating shaft; 6, sliding rail; 7, sliding block; 8, mounting groove; 9, gap; 10, chair back framework; 11, chair seat framework; 12, inner cavity; 13, notch; 14, through groove; 15, fixing groove; 16, fixing shaft; 17, first locking mechanism; 18, first fixing groove; 19, second fixing groove; 20, first inclined groove; 21, mounting seat; 22, locking block; 23, bolt; 24, limiting groove; 25, blocking edge; 26, return spring; 27, unlocking handle; 28, guide protrusion; 29, guide groove; 30, upper passage; 31, lower passage; 32, second locking mechanism; 33, shoulder belt hole; 34, locking pin shaft; 35, fixing sheet; 36, gear groove; 37, safety belt groove; 38, cover plate; 39, waist belt hole; 40, crotch belt hole; 41, first reinforcing rod; 42, second reinforcing rod; 43, upper cover plate; 44, lower cover plate; 45, binding hole; 46, accommodating cavity; 47, side cover plate; 48, cup holder; 49, arc-shaped inner recess; 50, positioning groove; 51, positioning block; 52, buckle groove; 53, buckle; 54, button; 55, unlocking sliding block; 56, second inclined groove; 57, rotating shaft seat; 58, rotating shaft hole; 59, sliding groove; 60, moving block. DETAILED DESCRIPTION

[0037] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined purposes, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0038] Example 1

[0039] The child safety seat provided in the present embodiment is as shown in Figures 1-4As shown, the chair includes a backrest 1 and a seat 2, which are detachably connected. A headrest 3 that can move up and down is provided on the backrest 1. Side wings 4 are provided on both sides of the headrest 3, and the side wings 4 are rotatably connected to the backrest 1 via a pivot 5. A slide rail 6 is provided on the opposite side of each side wing 4. The slide rail 6 is spiral-shaped, and a slider 7 that cooperates with the slide rail 6 is provided on the headrest 3. The direction of the slide rail 6 is the same as the direction of the pivot 5. A pivot seat 57 is provided on the side wing 4, and a pivot hole 58 is provided on the pivot seat 57. The pivot 5 passes through the pivot hole 58, and the slide rail 6 is mounted on the pivot seat 57. A typical linear track and slider combination only allows for linear movement of the slider while the track remains stationary. However, a spiral track 6, in conjunction with a slider 7, allows the track 6 to move laterally as the slider 7 moves vertically. This lateral movement is then converted into rotation via a pivot 5, enabling the side wings 4 to rotate and open. The vertical movement of the slider 7 follows the movement of the headrest 3, creating a linkage between the headrest 3 and the side wings 4. The sliding of the slider 7 allows the side wings 4 to open or close, adjusting their width to accommodate different users. This linkage structure occupies less space, freeing up more room for other components on the backrest 1. It is simple, reliable, and has lower production costs. The detachable backrest 1 and seat 2 facilitate storage when not in use. After the backrest 1 is removed, the seat 2 can be used as a booster, broadening the age range of users.

[0040] To reduce the overall volume while ensuring structural strength, the backrest 1 has inwardly recessed mounting grooves 8 on both sides, and the rotating shaft 5 is mounted on the mounting grooves 8. The design of the mounting grooves 8 allows the rotating shaft 5 to be installed inside the backrest 1, reducing the space occupied on both sides, while increasing the contact between the side wings 4 and the backrest 1. This allows the impact of the side wings 4 to be transmitted to the backrest 1, increasing the impact resistance of the side wings 4 and improving safety.

[0041] To ensure reliable rotation of wing 4, such as Figure 14 As shown, there is a gap 9 between the side wing 4 and the backrest 1. The design of the gap 9 provides a margin for the rotation of the side wing 4, ensuring the normal rotation of the side wing 4.

[0042] To increase strength, such as Figure 5 As shown, a backrest frame 10 is provided on the backrest 1, and one side of the backrest frame 10 abuts against the side wall of the mounting groove 8. The backrest frame 10 is used to improve the overall strength of the backrest 1. The fact that one side of the backrest frame 10 abuts against the side wall of the mounting groove 8 makes the distance between the backrest frame 10 and the pivot 5 closer, so that the impact of the side wings 4 can be transmitted to the backrest frame 10, increasing the impact resistance of the side wings 4 and improving safety.

[0043] To improve strength, a seat frame 11 is provided on the seat 2. The design of the seat frame 11 improves the overall strength of the seat 2.

[0044] In order to install reliably, as shown in Figure 6 、 Figure 7 、 Figure 16 The chair back 1 is provided with a hollow inner cavity 12, and the inner cavity 12 is provided with a gap 13 at the top, the gap 13 is communicated with the outside, the headrest 3 is partially arranged on the inner cavity 12 through the gap 13, the installation groove 8 is provided with a through groove 14 communicated with the inner cavity 12, and the slide rail 6 is partially arranged on the inner cavity 12 through the through groove 14, and the width of the through groove 14 is greater than the width of the slide rail 6. The inner cavity 12 is used for partially receiving and installing the headrest 3, the design of the gap 13 can ensure that the part of the headrest 3 supporting the head can extend to the outside, the through groove 14 is used for the passing of the slide rail 6, and the width of the through groove 14 is relatively large, so that the rotation of the slide rail 6 is facilitated, and then the side wing 4 is rotated.

[0045] In order to rotate the side wing 4 reliably, the length direction of the rotating shaft 5 extends along the length direction of the chair back 1. The length direction of the rotating shaft 5 extends along the length direction of the chair back 1, which is convenient for the arrangement of the rotating shaft 5, can make the length of the rotating shaft 5 longer, and the rotation stress is better.

[0046] In order to improve the strength, the rotating shaft 5 is a metal piece. The metal rotating shaft 5 has higher structural strength, is more wear-resistant, prolongs the service life, can increase the impact resistance of the side wing 4, and improves the safety.

[0047] In order to ensure that the side wing 4 is reliably opened, the distance between the slide rail 6 and the moving route of the headrest 3 gradually increases from bottom to top. When the headrest 3 moves upward, the sliding block 7 will move upward at the same time, at this time, the sliding block 7 will drive the slide rail 6 far away from the headrest 3 to be close to the headrest 3, and the side wing 4 will rotate at the same time, so that the side wing 4 is opened.

[0048] In order to reliably disassemble the chair back 1 and the chair seat 2, as shown in Figure 8 、 Figure 9 、 Figure 15As shown, the chair back 1 is provided with at least two transversely opened fixing grooves 15, the fixing grooves 15 are communicated with the outside, the chair seat 2 is provided with fixing shafts 16 matched with the fixing grooves 15, and the chair back 1 is provided with at least one first locking mechanism 17 for clamping the fixing shafts 16. In the embodiment, the first locking mechanism 17 is arranged on both sides to fix more firmly. The fixing groove 15 is used for accommodating the fixing shaft 16, the fixing groove 15 is transversely opened to make the fixing shaft 16 unable to move up and down in the fixing groove 15, and at least two fixing grooves 15 can prevent the chair back 1 from rotating around the fixing shaft 16. The fixing groove 15 is communicated with the outside, which is convenient for the fixing shaft 16 to be directly clamped into the fixing groove 15 instead of being arranged in the fixing groove 15, and the installation is more convenient. The first locking mechanism 17 is used for fixing the fixing shaft 16 to prevent the fixing shaft 16 from moving. When the fixing shaft 16 is in the locked state, the fixing shaft 16 abuts against one side of the fixing groove 15 in the transverse direction. In this state, the fixing shaft 16 is limited by the fixing groove 15 in the up-down direction and is limited by the abutment in the transverse direction. The first locking mechanism 17 only needs to limit the other side in the transverse direction to completely fix the fixing shaft 16. The overall design is detachable, which is convenient for storage when not in use. After the chair back 1 is detached, the chair seat 2 can be used as a height-increasing pad, so that the age range of the seat is wider.

[0049] In order to improve the strength, the fixing groove 15 is arranged on the chair back framework 10, and the fixing shaft 16 is connected with the chair seat framework 11. Arranging the fixing groove 15 on the chair back framework 10 can ensure the strength of the fixing groove 15, and connecting the fixing shaft 16 with the chair seat framework 11 can ensure the strength of the fixing shaft 16. The chair back framework 10 is connected with the chair seat framework 11, so that the impact force during use is borne by the frameworks, the overall impact resistance is stronger, the use stability is better, and the connection strength between the frameworks is higher because two pin points are arranged on both sides, so that the chair back 1 is not easy to shake.

[0050] In order to fix the chair back 1 and the chair seat 2 reliably, as shown, Figure 18 the fixing groove 15 includes a first fixing groove 18 and a second fixing groove 19. The first fixing groove 18 is transversely connected with the outside, and the second fixing groove 19 is communicated with the outside through a first inclined groove 20. The inclination direction of the first inclined groove 20 is on the same side as the opening direction of the first fixing groove 18. The first fixing groove 18 is transversely connected, so that the fixing shaft 16 can be directly entered in the transverse direction. The first inclined groove 20 is used for the fixing shaft 16 to enter the second fixing groove 19. During use, the first fixing groove 18 is directly sleeved on one fixing shaft 16. In the process of sleeving the first fixing groove 18 on one fixing shaft 16, the other fixing shaft 16 enters the second fixing groove 19 through the first inclined groove 20. In the embodiment, the first locking mechanism 17 is arranged on the side of the second fixing groove 19.

[0051] In order to lock reliably, as shown, Figure 10 , Figure 11 , Figure 19, the first locking mechanism 17 includes a mounting seat 21, a locking block 22 and a bolt 23, the locking block 22 is rotatably connected with the mounting seat 21, the bolt 23 is slidably connected with the mounting seat 21, the locking block 22 is provided with a limiting groove 24 and a blocking edge 25, in the locked state of the fixing shaft 16, the bolt 23 abuts against the blocking edge 25, the second fixing groove 19 and the limiting groove 24 form a closed structure, in the unlocked state of the fixing shaft 16, one side of the limiting groove 24 is arranged on the second fixing groove 19. The mounting seat 21 is arranged on the backrest 1, the mounting seat 21 is provided with a sliding groove 59, the bolt 23 is provided with a moving block 60 matched with the sliding groove 59. The mounting seat 21 is used for providing mounting support, the locking block 22 is used for locking the fixing shaft 16 to prevent the fixing shaft 16 from moving transversely, the bolt 23 is used for fixing the locking block 22 to prevent the locking block 22 from rotating, the limiting groove 24 is used for fixing the fixing shaft 16, the blocking edge 25 is used for cooperating with the bolt 23, the locking block 22 cannot rotate by blocking the blocking edge 25 through the bolt 23. When locking, the fixing shaft 16 is simultaneously clamped into the limiting groove 24 in the process of entering the fixing groove 15, and drives the locking block 22 to rotate until the fixing shaft 16 abuts against the transverse side of the fixing groove 15, at this time, the blocking edge 25 on the locking block 22 is lower, the bolt 23 can fall under the action of gravity, the side surface of the bolt 23 abuts against the blocking edge 25 to block the rotation of the locking block 22, the fixing shaft 16 is blocked outwardly by the limiting groove 24 and inwardly by the fixing groove 15, and the locking of the fixing shaft 16 is completed; when unlocking, the bolt 23 is pulled upwardly so that the bolt 23 is separated from the blocking edge 25, at this time, the fixing shaft 16 can move outwardly, drives the locking block 22 to rotate, so that the blocking edge 25 is away from the bolt 23, after the fixing shaft 16 moves out, the blocking edge 25 abuts against the mounting seat 21 to prevent the locking block 22 from rotating unlimitedly, and meanwhile, the next entering of the fixing shaft 16 is facilitated.

[0052] In order to use reliably, the reset spring 26 for resetting the locking block 22 is arranged between the locking block 22 and the mounting seat 21. The reset spring 26 is designed to keep the locking block 22 in the unlocked state, and facilitates the entering of the fixing shaft 16.

[0053] In order to improve the strength, the mounting seat 21 is connected with the backrest framework 10. The mounting seat 21 is connected with the backrest framework 10, so that the fixing strength of the mounting seat 21 is high, the locking strength of the first locking mechanism 17 to the fixing shaft 16 is high, and the locking is more reliable.

[0054] In order to facilitate unlocking, the unlocking handle 27 linked with the bolt 23 is arranged on the backrest 1. Specifically, the unlocking handle 27 can be linked with the bolt 23 through a steel wire. The design of the unlocking handle 27 facilitates the unlocking and disassembly of the backrest 1 and the seat 2.

[0055] In order to facilitate the installation of the chair back 1 and the chair seat 2, the bottom of the chair back 1 is provided with at least one downward guiding protrusion 28, and the chair seat 2 is provided with a guiding groove 29 matched with the guiding protrusion 28. The matched design of the guiding protrusion 28 and the guiding groove 29 facilitates the installation and positioning of the chair back 1 and the chair seat 2, and can improve the stability.

[0056] In order to facilitate the installation, a fixing groove 15 is arranged on the guiding protrusion 28, and a fixing shaft 16 is arranged on the guiding groove 29. Such design makes the matched installation of the guiding protrusion 28 and the guiding groove 29 synchronous with the matched installation of the fixing groove 15 and the fixing shaft 16, and the installation and disassembly are more convenient.

[0057] In order to improve the stability, two guiding protrusions 28 are arranged, and two guiding grooves 29 are matched. The design of two guiding protrusions 28 and two guiding grooves 29 has better guiding performance and higher stability.

[0058] In order to improve the strength, the fixing shaft 16 penetrates through the two guiding grooves 29, and the fixing shaft 16 is connected with the chair seat skeletons 11 on both sides. The fixing shaft 16 is not segmented as a whole, so that the strength of the fixing shaft 16 is higher, and the connection strength of the chair back 1 and the chair seat 2 is ensured.

[0059] In order to facilitate the passing of the safety belt, an upper channel 30 is arranged on the chair back 1, and a lower channel 31 is arranged on the chair seat 2, and the upper channel 30 and the lower channel 31 are communicated. The upper channel 30 and the lower channel 31 are used for the passing of the safety belt.

[0060] In order to not affect the first locking mechanism 17, the upper channel 30 is arranged between the two guiding protrusions 28, and the lower channel 31 is arranged between the two guiding grooves 29. The upper channel 30 and the lower channel 31 are arranged in the middle, which ensures the five-point safety belt passing and has sufficient movement space, so that the safety belt does not affect the unlocking of the first locking mechanism 17.

[0061] In order to improve the strength, the lower channel 31 is arranged between the adjacent two fixing shafts 16. The lower channel 31 is arranged between the fixing shafts 16, so that the safety belt can be supported by the fixing shafts 16, and the tensioning strength of the safety belt is improved.

[0062] In order to use the safety belt reliably, Figure 12As shown, the headrest 3 is provided with a second locking mechanism 32, which is arranged on the back of the headrest 3. The headrest 3 is provided with a shoulder strap hole 33. The second locking mechanism 32 includes a locking pin shaft 34 and a multi-position fixing plate 35. The locking pin shaft 34 is arranged below the shoulder strap hole 33 and is connected with the headrest 3. The fixing plate 35 is connected with the backrest 1. A five-point safety belt is arranged through the shoulder strap hole 33. The design of the locking pin shaft 34 can cooperate with the fixing plate 35 for position fixing during height adjustment of the headrest 3. After the five-point safety belt is arranged through the shoulder strap hole 33, the safety belt will press on the locking pin shaft 34. The impact force of the safety belt will be transmitted to the backrest 1 through the locking pin shaft 34, thereby increasing the stability and reliability of the safety belt and reducing the direct impact force on the headrest 3. The locking pin shaft 34 will move along with the up-down movement of the headrest 3, so that the distance between the shoulder strap hole 33 and the locking pin shaft 34 is constant, and the impact force transmission effect of the safety belt is guaranteed.

[0063] In order to improve the strength, the fixing plate 35 is connected with the backrest framework 10. The connection of the fixing plate 35 with the backrest framework 10 can improve the strength of the fixing plate 35, so that the impact force of the safety belt is transmitted to the backrest framework 10 through the locking pin shaft 34, thereby increasing the stability and reliability of the safety belt.

[0064] In order to improve the strength of the backrest 1, the backrest framework 10 is symmetrically arranged, and the locking pin shaft 34 is connected with the fixing plate 35 on both sides. The backrest framework 10 is arranged in two, which is better for improving the strength of the backrest 1, and the symmetric arrangement is more stable in force. The locking pin shaft 34 is connected with the fixing plate 35 on both ends, so that the force on both ends of the locking pin shaft 34 can be transmitted to the backrest framework 10, thereby increasing the stability and reliability of the safety belt.

[0065] In order to use reliably, the cross section of the fixing plate 35 is in U shape, one side of the U shape is provided with a position slot 36, and the other side is connected with the backrest framework 10. The U-shaped design of the fixing plate 35 can improve the strength of the fixing plate 35 itself. The one side of the U shape is connected with the backrest framework 10, and the other side is used for position fixing of the locking pin shaft 34. The two sides do not interfere with each other, which is convenient to use.

[0066] In order to conveniently store the safety belt, the chair seat 2 is provided with a safety belt groove 37. The design of the safety belt groove 37 can place the safety belt inside when not in use, which is more beautiful in appearance, and can prevent the safety belt from being lost while reducing the sound emitted by the safety belt in collision.

[0067] In order to conveniently store the safety belt, the safety belt groove 37 is arranged on the middle of the upper surface of the chair seat 2, and a rotatable cover plate 38 is arranged on the safety belt groove 37. The design of the cover plate 38 can shield the safety belt groove 37 and play a protective role in the inside of the safety belt groove 37, and also provide support for children sitting on the chair seat 2.

[0068] In order to facilitate the storage of the safety belt, the safety belt slot 37 is provided with symmetrical waist belt holes 39 on both sides. The waist belt holes 39 are arranged on both sides of the safety belt slot 37, which facilitates the threading of the safety belt and also facilitates the storage of the safety belt in the safety belt slot 37.

[0069] In order to facilitate the storage of the safety belt, the safety belt slot 37 is provided with symmetrical waist belt holes 39 on both sides. The waist belt holes 39 are arranged on both sides of the safety belt slot 37, which facilitates the threading of the safety belt and also facilitates the storage of the safety belt in the safety belt slot 37.

[0070] In order to improve the strength of the seat 2, the seat frame 11 is provided with a first reinforcing rod 41 and a second reinforcing rod 42. The first reinforcing rod 41 is arranged behind the waist belt hole 39, and the second reinforcing rod 42 is arranged below the crotch belt hole 40. The design of the first reinforcing rod 41 and the second reinforcing rod 42 can improve the overall strength of the seat 2. The first reinforcing rod 41 is arranged behind the waist belt hole 39, which facilitates the pressing of the safety belt on the first reinforcing rod 41, so that the impact force received by the safety belt is transmitted to the seat frame 11 through the first reinforcing rod 41, thereby increasing the stability and reliability of the use of the safety belt. The second reinforcing rod 42 is arranged below the crotch belt hole 40, which facilitates the pressing of the safety belt on the second reinforcing rod 42, so that the impact force received by the safety belt is transmitted to the seat frame 11 through the second reinforcing rod 42, thereby increasing the stability and reliability of the use of the safety belt.

[0071] In order to facilitate the installation of the safety belt on the seat back 1, the back of the seat back 1 is provided with a rotatable upper cover plate 43. The design of the upper cover plate 43 can facilitate the threading and removal of the safety belt.

[0072] In order to facilitate the installation of the safety belt on the seat back 1, the back of the seat back 1 is provided with a rotatable upper cover plate 43. The design of the upper cover plate 43 can facilitate the threading and removal of the safety belt.

[0073] In order to facilitate the installation, the seat back 1 is provided with a binding hole 45 on both sides. The design of the binding hole 45 is used for the threading and fixing of the flexible FIX connector, and the position of the FIX connector is relatively high, the moment relative to the seat 2 is relatively large, so that the overall stability of the seat is better.

[0074] In order to facilitate storage, the seat 2 is provided with a containing cavity 46. The containing cavity 46 is used for the storage of the flexible FIX connector, the overall appearance is more neat, and the loss rate of the flexible FIX connector is reduced.

[0075] In order to facilitate storage, the containing cavity 46 is provided with a rotatable side cover plate 47. The side cover plate 47 is used to shield the containing cavity 46, and the whole is more beautiful.

[0076] To enhance practicality, the seat 2 is equipped with a cup holder 48. The cup holder 48 is designed to conveniently hold water cups for easy access when drinking water, and can also hold small items to prevent children's toys from being lost.

[0077] To improve practicality, cup holders 48 are located on both sides of the seat 2. The symmetrical design is more aesthetically pleasing, and the two cup holders 48 are more functional.

[0078] To facilitate the placement of the cup holder 48, the seat 2 has an arc-shaped recess 49, on which the cup holder 48 is placed. The design of the arc-shaped recess 49 facilitates the placement of the cup holder 48 and reduces the outward space occupied, thus reducing the overall volume.

[0079] To ensure the cup holder 48 is placed securely, such as Figure 13 As shown, the seat 2 is provided with a positioning groove 50, and the cup holder 48 is provided with a positioning block 51 that cooperates with the positioning groove 50. The positioning groove 50 is connected to the arc-shaped concave 49. The positioning groove 50 and the positioning block 51 cooperate to guide the cup holder 48, making it convenient to store and retrieve the cup holder 48.

[0080] To ensure the cup holder 48 is placed securely, such as Figure 17 As shown, the cup holder 48 is provided with a locking groove 52, and the seat 2 is provided with a buckle 53 that cooperates with the locking groove 52. The locking groove 52 and the buckle 53 cooperate to fix the cup holder 48 after it is placed in, preventing the cup holder 48 from falling off accidentally.

[0081] To facilitate access to the cup holder 48, a button 54 is provided on the seat 2, which is linked to the buckle 53. The button 54 is designed to facilitate unlocking the buckle 53, making it easy to access the cup holder 48.

[0082] To facilitate height adjustment of the headrest 3, the second locking mechanism 32 includes an unlocking slider 55 with a second inclined groove 56. A locking pin 34 passes through the second inclined groove 56, and one end of the unlocking slider 55 is rotatably connected to the headrest 3. The unlocking slider 55 is self-resetting and can be achieved using a torsion spring, return spring, or similar method. The unlocking slider 55 is used for adjusting the headrest 3's height. When the locking pin 34 is locked onto the fixed plate 35, rotating the unlocking slider 55 causes the locking pin 34 to move outward, disengaging it from the fixed plate 35. At this point, the headrest 3 is unlocked and its height can be adjusted. After adjustment, the unlocking slider 55 resets, causing the locking pin 34 to return to the position groove 36 of the fixed plate 35, completing the locking process. The design of the second inclined groove 56 allows for some movement of the locking pin 34 when the unlocking slider 55 rotates, preventing it from getting stuck on the fixed plate 35 and facilitating the movement of the locking pin 34.

[0083] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, as long as the changes or modifications do not deviate from the technical solution of the present application. Any modification, change, equivalent change and modification of the above embodiments made according to the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. A child safety seat, characterized in that, The application relates to a chair back (1) and a chair seat (2) which are detachably connected, the chair back (1) is provided with a headrest (3) which can move up and down, the headrest (3) is provided with side wings (4) on both sides, the side wings (4) are rotationally connected with the chair back (1) through a rotating shaft (5), the side wings (4) are provided with slide rails (6) on the opposite sides, the slide rails (6) are in a spiral shape, the headrest (3) is provided with slide blocks (7) matched with the slide rails (6), the setting direction of the slide rails (6) is the same as the setting direction of the rotating shaft (5); the length direction of the rotating shaft (5) extends along the length direction of the chair back (1); the rotating shaft (5) is a metal piece; the distance between the slide rails (6) and the moving route of the headrest (3) gradually increases from bottom to top; the chair back (1) is provided with at least two transversely arranged fixing grooves (15) which are communicated with the outside, the chair seat (2) is provided with fixing shafts (16) matched with the fixing grooves (15), the chair back (1) is provided with at least one first locking mechanism (17) for clamping the fixing shafts (16); the fixing grooves (15) are arranged on a chair back framework (10), the fixing shafts (16) are connected with a chair seat framework (11); the fixing grooves (15) comprise first fixing grooves (18) and second fixing grooves (19), the first fixing grooves (18) are transversely connected with the outside, the second fixing grooves (19) are communicated with the outside through first inclined grooves (20), the inclined direction of the first inclined grooves (20) is the same as the opening direction of the first fixing grooves (18); the first locking mechanism (17) comprises a mounting base (21), a locking block (22) and a bolt (23), the locking block (22) is rotationally connected with the mounting base (21), the bolt (23) is slidably connected with the mounting base (21), the locking block (22) is provided with a limiting groove (24) and a blocking edge (25), in the locking state of the fixing shafts (16), the bolt (23) abuts against the blocking edge (25), the second fixing grooves (19) and the limiting groove (24) form a closed structure, in the unlocking state of the fixing shafts (16), one side of the limiting groove (24) is arranged on the second fixing grooves (19); a reset spring (26) for resetting the locking block (22) is arranged between the locking block (22) and the mounting base (21); the mounting base (21) is connected with the chair back framework (10); the chair back (1) is provided with an unlocking handle (27) linked with the bolt (23).

2. A child safety seat according to claim 1, characterised in that: The chair back (1) is provided with inwardly recessed mounting grooves (8) on both sides, the rotating shaft (5) is arranged on the mounting grooves (8); gaps (9) are arranged between the side wings (4) and the chair back (1); the chair back (1) is provided with a chair back framework (10), one side of the chair back framework (10) abuts against the side wall of the mounting groove (8); the chair seat (2) is provided with a chair seat framework (11).

3. A child safety seat according to claim 2, characterised in that: The chair back (1) is provided with a hollow inner cavity (12), the top of the inner cavity (12) is provided with a gap (13) which is communicated with the outside, the headrest (3) is partially arranged on the inner cavity (12) through the gap (13), the mounting groove (8) is provided with a through groove (14) which is communicated with the inner cavity (12), the slide rail (6) is partially arranged on the inner cavity (12) through the through groove (14), and the width of the through groove (14) is greater than the width of the slide rail (6).

4. A child safety seat according to claim 1, characterized in that: The bottom of the chair back (1) is provided with at least one downward guide protrusion (28), the chair seat (2) is provided with a guide groove (29) matched with the guide protrusion (28), the fixing groove (15) is arranged on the guide protrusion (28), and the fixing shaft (16) is arranged on the guide groove (29); the guide protrusion (28) is provided with two, the guide groove (29) is provided with two in a matched mode, the fixing shaft (16) penetrates the two guide grooves (29), the chair back (1) is provided with an upper channel (30), the chair seat (2) is provided with a lower channel (31), the upper channel (30) is communicated with the lower channel (31), the upper channel (30) is arranged between the two guide protrusions (28), the lower channel (31) is arranged between the two guide grooves (29), and the lower channel (31) is arranged between the adjacent two fixing shafts (16).

5. A child safety seat according to claim 2, characterised in that: The headrest (3) is provided with a second locking mechanism (32), the second locking mechanism (32) is arranged on the back of the headrest (3), the headrest (3) is provided with a shoulder strap hole (33), the second locking mechanism (32) comprises a locking pin shaft (34) and a multi-gear fixing sheet (35), the locking pin shaft (34) is arranged below the shoulder strap hole (33), the locking pin shaft (34) is connected with the headrest (3), and the fixing sheet (35) is connected with the chair back (1); the fixing sheet (35) is connected with the chair back framework (10); the chair back framework (10) is symmetrically arranged, the two ends of the locking pin shaft (34) are connected with the fixing sheets (35) on the two sides respectively; the cross section of the fixing sheet (35) is in a U shape, one side of the U shape is provided with a gear groove (36), and the other side is connected with the chair back framework (10).

6. A child safety seat according to claim 5, characterised in that: The chair seat (2) is provided with a safety belt groove (37); the safety belt groove (37) is arranged in the middle of the upper surface of the chair seat (2), the safety belt groove (37) is provided with a rotatable cover plate (38); the safety belt groove (37) is provided with symmetrical waist belt holes (39) on the two sides, the safety belt groove (37) is provided with a crotch belt hole (40) in front; the chair seat framework (11) is provided with a first reinforcing rod (41) and a second reinforcing rod (42), the first reinforcing rod (41) is arranged behind the waist belt hole (39), and the second reinforcing rod (42) is arranged below the crotch belt hole (40); the back of the chair back (1) is provided with a rotatable upper cover plate (43); the back of the chair seat (2) is provided with a rotatable lower cover plate (44); the chair back (1) is provided with binding holes (45) on the two sides; the chair seat (2) is provided with a containing cavity (46); the containing cavity (46) is provided with a rotatable side cover plate (47).

7. A child safety seat according to claim 6, characterised in that: The chair seat (2) is provided with a cup holder (48); the cup holder (48) is arranged on both sides of the chair seat (2); the chair seat (2) is provided with an arc-shaped recess (49), and the cup holder (48) is arranged on the arc-shaped recess (49); the chair seat (2) is provided with a positioning groove (50), the cup holder (48) is provided with a positioning block (51) matched with the positioning groove (50), and the positioning groove (50) is communicated with the arc-shaped recess (49); the cup holder (48) is provided with a buckle groove (52), and the chair seat (2) is provided with a buckle (53) matched with the buckle groove (52); the chair seat (2) is provided with a button (54), and the button (54) is linked with the buckle (53); the second locking mechanism (32) comprises an unlocking slider (55), the unlocking slider (55) is provided with a second inclined groove (56), the locking pin shaft (34) is arranged on the second inclined groove (56), and one end of the unlocking slider (55) is rotatably connected with the headrest (3).

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