Safety belt winding structure of child seat and child safety seat

Abstract

The utility model relates to the field of automobile safety supplies, and discloses a safety belt furling structure of a child seat and the child safety seat, the safety belt furling structure comprises a shell, a pin shaft and two built-in safety belts, the pin shaft is installed in the shell in a rotating mode, and the two built-in safety belts are both wound on the pin shaft. The pin shaft is connected with an automatic winding and locking assembly used for winding the two safety belts at the same time or locking the two safety belts at the same time, and the automatic winding and locking assembly is located between the two safety belts and contained in the shell. Under the condition that the distance between outlets of the safety belts is relatively fixed, the automatic furling and locking assembly is arranged in the middle in the shell, the space between the two safety belts can be fully utilized, the space on the two sides is saved, the compactness of the internal structure is enhanced, the size of the whole safety belt furling structure is reduced, and the safety belt furling structure is convenient to use. Therefore, the suitability of the product is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile safety products, in particular to a safety belt winding structure of a child seat and a child safety seat. BACKGROUND

[0002] The five-point safety belt of the child safety seat needs two safety belts to bind the child, and the length of the two safety belts usually needs to be adjusted manually to ensure that the child is fixed properly. Once the adjustment is completed, the two safety belts will completely bind the child, thereby providing maximum safety protection. However, due to this complete binding, the child's mobility and freedom are limited, which can cause the child to feel uncomfortable in the child safety seat, and ultimately can reduce their willingness and frequency of using the child safety seat. SUMMARY

[0003] To solve at least one aspect of the above problems, the utility model first provides a safety belt winding structure of a child seat, which comprises a shell, a pin shaft, and two self-contained safety belts. The pin shaft is rotatably installed in the shell, and the two self-contained safety belts are wound on the pin shaft. The pin shaft is connected with an automatic winding and locking assembly for simultaneously winding or locking the two self-contained safety belts. The automatic winding and locking assembly is located between the two self-contained safety belts and is accommodated in the shell.

[0004] Optionally, the utility model further comprises a child safety seat, which comprises a seat back and a buckle provided on the front side of the seat back. The two self-contained safety belts are detachably connected with the buckle. The automatic winding and locking assembly comprises a power assembly and a locking assembly. The power assembly is used for simultaneously winding the two self-contained safety belts, and the locking assembly is used for simultaneously locking the two self-contained safety belts.

[0005] Optionally, the shell comprises a base, and the base is provided with a receiving cavity. The pin shaft comprises a connecting portion, which is rotatably installed in the receiving cavity. The pin shaft is connected with a first winding shaft and a second winding shaft at both ends, respectively. The two self-contained safety belts are wound on the first winding shaft and the second winding shaft, respectively. The power assembly is sleeved between the connecting portion and the first winding shaft, and the locking assembly is sleeved between the connecting portion and the second winding shaft. The power assembly is accommodated in the receiving cavity.

[0006] Optionally, the shell comprises a cover which is covered with the base, first and second baffles are arranged between the two end side walls of the cover, a first chamber is formed between the first baffle and the left side wall of the cover, the first reel is accommodated in the first chamber, a second chamber is formed between the second baffle and the right side wall of the cover, and the second reel is accommodated in the second chamber.

[0007] Optionally, the power assembly comprises a coil spring and a mounting seat, the coil spring is mounted on the mounting seat, the mounting seat is connected with the pin shaft and rotates with the pin shaft, the pin shaft rotates forward and reversely with the expansion and contraction of the coil spring, when the two self-belt safety belts are released and pulled out, the pin shaft rotates forward and makes the coil spring tighten under force until the two self-belt safety belts are locked by the buckle and are tightened under the spring force of the coil spring, when the two self-belt safety belts are separated from the buckle, the pin shaft reversely rotates under the spring force of the coil spring to drive the self-belt safety belts to be wound.

[0008] Optionally, the locking assembly comprises a gear plate, interconnecting ratchet teeth and a torsion spring, the gear plate is connected with the shell, and the ratchet teeth are connected with the pin shaft; when the vehicle speed is normal, the ratchet teeth are arranged at intervals from the gear plate under the spring force of the torsion spring to realize the free rotation of the ratchet teeth relative to the gear plate; when the vehicle speed is not normal, the ratchet teeth are engaged with the gear plate under the centrifugal force to limit the rotation of the pin shaft.

[0009] Optionally, it further comprises an angle adjusting assembly, the locking assembly further comprises a flywheel and a positioning seat, the positioning seat is connected with the flywheel and the pin shaft, and the angle adjusting assembly is adapted to lock the flywheel; when the angle of the chair back is normally installed, the angle adjusting assembly is arranged at intervals from the flywheel, the ratchet teeth are arranged at intervals from the gear plate under the spring force of the torsion spring to realize the free rotation of the ratchet teeth relative to the gear plate; when the angle of the chair back is not normally changed, the angle adjusting assembly is locked with the flywheel, the flywheel drives the torsion spring to twist to make the ratchet teeth engage with the gear plate to limit the rotation of the pin shaft.

[0010] Optionally, the angle adjusting assembly comprises a locking block, a rolling ball and a ball seat for the rolling ball to be placed, one end of the locking block is hingedly connected with the ball seat, and a limiting tooth is arranged on the outer wall of the flywheel in the circumferential direction; when the angle of the chair back is not normally changed, the rolling ball abuts against the locking block to make the other end of the locking block be locked with the limiting tooth.

[0011] Optionally, two safety belt outlets are arranged on the shell at intervals, and the two safety belt outlets are respectively used for the two self-belted safety belts to pass out.

[0012] With respect to the prior art, the safety belt winding structure of the child seat in the utility model simultaneously installs two self-belted safety belts on a pin shaft, so that the two self-belted safety belts can be simultaneously released and wound, and the structure is simple and reliable; and the automatic winding locking assembly is arranged, so that the occupant has a free moving space under the restraint of the self-belted safety belt under normal vehicle conditions, can appropriately move, and the comfort of the child occupant is enhanced; under abnormal vehicle conditions, the movement of the self-belted safety belt can be limited, so that the occupant is restrained and protected. Under the condition that the safety belt outlet interval is relatively fixed, the automatic winding locking assembly is arranged at the middle position in the shell, the space between the two safety belts can be fully utilized, the space on both sides is saved, the internal structure compactness is enhanced, the volume of the entire safety belt winding structure is reduced, and the adaptability of the product is enhanced.

[0013] In addition, the utility model provides a child safety seat which comprises the safety belt winding structure of the child seat.

[0014] With respect to the prior art, the child safety seat of the utility model has the same advantages as the safety belt winding structure of the child seat with respect to the prior art, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The structure of the safety belt winding structure of the utility model embodiment Figure 1 ;

[0016] Figure 2 The enlarged view of A part in the utility model Figure 1 ;

[0017] Figure 3 The structure of the safety belt winding structure of the utility model embodiment Figure 2 ;

[0018] Figure 4 The structure diagram of the base of the utility model embodiment

[0019] Figure 5 The structure diagram of the cover of the utility model embodiment

[0020] Figure 6 The structure diagram of the pin shaft of the utility model embodiment

[0021] Figure 7 The explosion diagram of the power assembly of the utility model embodiment

[0022] Figure 8 The explosion diagram of the locking assembly of the utility model embodiment

[0023] Figure 9 Part structure of child safety seat Figure 1 ;

[0024] Figure 10 Part structure of child safety seat Figure 2 .

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 1, shell; 11, base; 111, containing cavity; 12, cover; 121, first baffle; 122, second baffle; 2, pin shaft; 21, connecting part; 22, first reel; 23, second reel; 3, with safety belt; 4, backrest; 41, buckle; 5, power assembly; 51, coil spring; 52, mounting seat; 6, locking assembly; 61, gear plate; 62, ratchet tooth; 63, torsional spring; 64, flywheel; 641, limiting tooth; 65, positioning seat; 7, angle adjusting assembly; 71, locking block; 72, ball seat. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model will be described in detail below with reference to the drawings.

[0028] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "upper", "lower" and the like is based on the orientation or position relationship when the product is normally used.

[0029] The terms "first", "second" are only for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature. The coordinate system XYZ is provided in the drawings of the embodiments of the utility model, wherein the positive direction of X axis represents the left direction, the negative direction of X axis represents the right direction, the positive direction of Y axis represents the front direction, the negative direction of Y axis represents the rear direction, the positive direction of Z axis represents the upper direction, and the negative direction of Z axis represents the lower direction.

[0030] The utility model embodiment provides a kind of safety belt winding structure of child seat, as shown in combination Figures 1-10 It includes shell 1, pin shaft 2 and two self-contained safety belts 3, the pin shaft 2 is rotatably installed in the shell 1, two self-contained safety belts 3 are all wound on the pin shaft 2, the pin shaft 2 is connected with the automatic winding locking assembly 6 for simultaneously winding two self-contained safety belts 3 or simultaneously locking two self-contained safety belts 3, the automatic winding locking assembly 6 is located between two self-contained safety belts 3 and is contained in the shell 1.

[0031] As shown in Figure 1 and 3 , two self-provided safety belts 3 are installed on a pin shaft 2 at the same time, so that the two self-provided safety belts 3 can be released and wound at the same time, the structure is simple and reliable; and the automatic winding locking assembly 6 is arranged, so that the passenger has a free moving space under the restraint of the self-provided safety belt 3 under normal vehicle conditions, can move appropriately, and the comfort of the child passenger is enhanced; under abnormal vehicle conditions, the movement of the self-provided safety belt 3 can be limited, thereby playing a role of restraining the passenger and protecting the passenger. In the case that the safety belt outlet distance is relatively fixed, the automatic winding locking assembly 6 is arranged in the middle position in the housing 1, the space between the two safety belts can be fully utilized, the space on both sides is saved, the internal structure compactness is enhanced, the volume of the entire safety belt winding structure is reduced, and the adaptability of the product is enhanced.

[0032] Optionally, a child safety seat is further included, the child safety seat includes a seat back 4 and a buckle 41 arranged on the front side of the seat back 4, two self-provided safety belts 3 are detachably connected with the buckle 41, the automatic winding locking assembly 6 includes a power assembly 5 and a locking assembly 6, the power assembly 5 is used for winding the two self-provided safety belts 3 at the same time, and the locking assembly 6 is used for locking the two self-provided safety belts 3 at the same time.

[0033] As shown in Figure 9 and 10 , in the embodiment, two self-provided safety belts 3 are respectively fixedly connected with the child safety seat, so that the two self-provided safety belts 3 present a design similar to a double-shoulder strap, and the child can wear conveniently; in addition, the two self-provided safety belts 3 can also be detachably connected with the buckle 41 on the front side of the seat back 4, when the child sits on the child safety seat, the self-provided safety belt 3 is connected and fixed with the buckle 41, and when the child needs to get off the child safety seat, the self-provided safety belt 3 is separated from the buckle 41, so that the self-provided safety belt 3 can be automatically wound.

[0034] Optionally, the housing 1 includes a base 11, the base 11 is provided with a containing cavity 111, the pin shaft 2 includes a connecting portion 21, the connecting portion 21 is rotatably installed in the containing cavity 111, the pin shaft 2 is respectively connected with a first winding shaft 22 and a second winding shaft 23 at two ends, two self-provided safety belts 3 are respectively wound on the first winding shaft 22 and the second winding shaft 23, the power assembly 5 is sleeved between the connecting portion 21 and the first winding shaft 22, the locking assembly 6 is sleeved between the connecting portion 21 and the second winding shaft 23, and the power assembly 5 is contained in the containing cavity 111.

[0035] As shown in Figure 3 , 4As shown in Figures 6 and 7, in this embodiment, the accommodating cavity 111 is located in the middle of the base 11, the connecting part 21 is located in the middle of the pin 2, the left and right ends of the pin 2 are straight rods, and the first scroll 22 and the second scroll 23 are provided with holes that are adapted to the straight rods so that the pin 2 can drive the first scroll 22 and the second scroll 23 to rotate synchronously.

[0036] Optionally, the housing 1 includes a cover 12 that covers the base 11. A first baffle 121 and a second baffle 122 are spaced apart between the two side walls of the cover 12. A first chamber is formed between the first baffle 121 and the left side wall of the cover 12, and the first scroll 22 is accommodated in the first chamber. A second chamber is formed between the second baffle 122 and the right side wall of the cover 12, and the second scroll 23 is accommodated in the second chamber.

[0037] like Figure 5 As shown, in this embodiment, the first baffle 121, the second baffle 122, and the two end sidewalls of the cover 12 cooperate to restrict not only the axial position of the power assembly 5 and the locking assembly 6, but also the axial position of the two self-contained safety belts 3. This makes the internal structure more stable and prevents it from moving arbitrarily axially while rotating.

[0038] Optionally, the power assembly 5 includes a coil spring 51 and a mounting base 52. The coil spring 51 is mounted on the mounting base 52. The mounting base 52 is connected to the pin 2 and rotates with the pin 2. The pin 2 rotates in both directions following the tension and relaxation of the coil spring 51. When the two built-in seat belts 3 are released and pulled out, the pin 2 rotates in the forward direction and causes the coil spring 51 to be tightened. After the two built-in seat belts 3 are locked with the buckle 41, the built-in seat belts 3 are tightened under the spring force of the coil spring 51. When the two built-in seat belts 3 are disengaged from the buckle 41, the pin 2 rotates in the reverse direction under the spring force of the coil spring 51 to drive the built-in seat belts 3 to retract.

[0039] like Figure 7As shown, in the embodiment, the shell 1 is installed on the chair back 4, each self-belt is connected with the plug buckle matched with the buckle 41 to realize the detachable connection of the self-belt 3 and the buckle 41; the two self-belts 3 are spaced and wound outside the pin shaft 2, which can realize the mutual non-interference of the two self-belts 3 and the synchronous rotation of the two self-belts 3 with the pin shaft 2; one end of the coil spring 51 is fixedly connected with the mounting seat 52, and the other end is fixedly connected with the shell 1; when the user connects the self-belt 3 with the buckle 41, the pin shaft 2 rotates forward to make the coil spring 51 tighten; when the self-belt 3 is tied, the user releases the hand, at this time, the coil spring 51 is opened under the action of the spring force and drives the pin shaft 2 to rotate reversely to realize the winding of the self-belt 3 until the self-belt 3 is attached to the occupant, at this time, the coil spring 51 still has a certain spring force; when the self-belt 3 and the buckle 41 are disconnected, the pin shaft 2 reversely rotates and drives the self-belt 3 to wind until it returns to the original position; in the embodiment, the abnormal vehicle conditions include the abnormal change of speed and the abnormal change of the angle of the chair back 4; in the normal vehicle condition, the two self-belts 3 can be freely released by external force, and the coil spring 51 can be automatically wound after the external force is removed. In addition, the coil spring 51 and the locking assembly 6 can also be arranged at the same end of the pin shaft 2.

[0040] In the embodiment, the forward direction is the clockwise direction or the counterclockwise direction, and the reverse direction is the direction opposite to the forward direction. The rotation direction of the pin shaft 2 is affected by the coil spring 51, which will not be described here.

[0041] Optionally, the locking assembly 6 comprises a gear plate 61 and a ratchet tooth 62 and a torsional spring 63 connected with each other, the gear plate 61 is connected with the shell 1, and the ratchet tooth 62 is connected with the pin shaft 2; when the vehicle speed is normal, the ratchet tooth 62 is spaced from the gear plate 61 under the action of the spring force of the torsional spring 63 to realize the free rotation of the ratchet tooth 62 relative to the gear plate 61; when the vehicle speed is not normal, the ratchet tooth 62 is engaged with the gear plate 61 under the action of the centrifugal force to limit the rotation of the pin shaft 2.

[0042] As Figure 8As shown, in this embodiment, one end of the pin shaft 2 is connected with the locking assembly 6, and the rotation and stop of the pin shaft 2 are controlled by the unlocking and locking of the locking assembly 6, so as to drive the free stretching release and emergency locking of the safety belt; the abnormal change of the vehicle speed includes the instant acceleration or deceleration of the vehicle; the gear plate 61 is provided with an internal ratchet suitable for cooperating with the ratchet tooth 62, the gear plate 61 is fixedly connected with the support, and the ratchet tooth 62 can rotate relative to the support; under the normal vehicle speed, the ratchet tooth 62 is freely movable relative to the gear plate 61 under the action of the torsional spring 63, and at this time, the self-provided safety belt 3 can be freely movable; when the vehicle speed is abnormally changed, the ratchet tooth 62 overcomes the torsional force of the torsional spring 63 and is locked with the gear plate 61 under the action of the centrifugal force in the instant of the pulling of the self-provided safety belt 3, so as to timely drive the self-provided safety belt 3 to be locked, and the safety of the passenger is protected.

[0043] Optionally, the angle adjusting assembly 7 is further included, the locking assembly 6 further includes a flywheel 64 and a positioning seat 65, the positioning seat 65 simultaneously connects the flywheel 64 and the pin shaft 2, and the angle adjusting assembly 7 is suitable for locking the flywheel 64; when the angle of the chair back 4 is normally installed, the angle adjusting assembly 7 is spaced apart from the flywheel 64, and the ratchet tooth 62 is spaced apart from the gear plate 61 under the action of the spring force of the torsional spring 63, so as to realize the free rotation of the ratchet tooth 62 relative to the gear plate 61; when the angle of the chair back 4 is abnormally changed, the angle adjusting assembly 7 is locked with the flywheel 64, the flywheel 64 drives the torsional spring 63 to be twisted, so that the ratchet tooth 62 is locked with the gear plate 61, and the rotation of the pin shaft 2 is limited.

[0044] As shown in Figure 1 and 2 shown, in this embodiment, the angle adjusting assembly 7 can sense the abnormal change of the angle of the chair back 4 itself, bind the passenger in the emergency, and ensure the safety of the child; specifically, when the child safety seat is normally installed, the ratchet tooth 62 is freely movable relative to the gear plate 61 under the action of the torsional spring 63, and at this time, the self-provided safety belt 3 can be freely movable; when the angle of the chair back 4 is abnormally changed, such as the vehicle driving up and down the steep slope, or even overturning, the angle adjusting assembly 7 will be locked with the flywheel 64 in time, the flywheel 64 drives the ratchet tooth 62 to be locked with the gear plate 61, so as to timely drive the self-provided safety belt 3 to be locked, and the safety is further improved.

[0045] Optionally, the angle adjusting assembly 7 comprises a locking block 71, a ball (not shown) and a ball seat 72 for movably placing the ball, one end of the locking block 71 is hingedly connected with the ball seat 72, and the outer wall of the flywheel 64 is provided with a limiting tooth 641 in the circumferential direction; when the angle of the chair back 4 is abnormally changed, the ball abuts against the locking block 71 to rotate the locking block 71 relative to the ball seat 72, so that the other end of the locking block 71 is locked with the limiting tooth 641.

[0046] As shown in the drawings, Figure 2 In this embodiment, the ball seat 72 has a certain moving space, and the ball can move freely in the ball seat 72, but the ball cannot roll out of the ball seat 72 due to the limitation of the locking block 71; when the angle of the chair back 4 is normal, the ball does not contact the locking block 71, and when the angle of the chair back 4 is abnormally changed, the ball moves towards the locking block 71 and pushes the locking block 71 to rotate around the hinged point with the ball seat 72, so that the other end of the locking block 71 is clamped and locked with the limiting tooth 641 of the flywheel 64, and then the flywheel 64 drives the ratchet teeth 62 to be locked and engaged with the gear plate 61, so as to timely drive the self-belt 3 to be locked.

[0047] Optionally, two safety belt outlets are arranged on the shell 1 at intervals, and the two safety belt outlets are respectively used for the two self-belts 3 to pass out.

[0048] As shown in the drawings, Figure 1 In this embodiment, the two safety belt outlets are arranged at intervals, so that the two self-belts 3 do not interfere with each other during movement, and the safety belt outlets are arranged on the headrest which can move relative to the chair back 4, so that when the headrest moves, the path of the self-belt 3 does not change, the friction force is ensured to be constant, and the automatic winding effect is better.

[0049] Another embodiment of the utility model provides a child safety seat, which comprises the safety belt winding structure of the child seat.

[0050] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A safety belt winding structure of a child seat, characterized by comprising: The utility model provides a kind of safety belt winding device, including shell (1), pin shaft (2) and two self-contained safety belts (3), the pin shaft (2) is rotatably mounted in the shell (1), two the self-contained safety belts (3) are wound on the pin shaft (2), the pin shaft (2) is connected with the automatic winding locking assembly for winding two the self-contained safety belts (3) or locking two the self-contained safety belts (3) simultaneously, the automatic winding locking assembly is located between two the self-contained safety belts (3) and is contained in the shell (1); The automatic winding locking assembly includes power assembly (5) and locking assembly (6), the power assembly (5) is used for winding two the self-contained safety belts (3) simultaneously, and the locking assembly (6) is used for locking two the self-contained safety belts (3) simultaneously; The shell (1) includes base (11), the base (11) is provided with accommodating cavity (111), the pin shaft (2) includes connecting part (21), the connecting part (21) is rotatably mounted in the accommodating cavity (111), and the two ends of the pin shaft (2) are connected with first reel (22) and second reel (23) respectively, two the self-contained safety belts (3) are wound on the first reel (22) and the second reel (23) respectively, the power assembly (5) is sleeved between the connecting part (21) and the first reel (22), the locking assembly (6) is sleeved between the connecting part (21) and the second reel (23), and the power assembly (5) is contained in the accommodating cavity (111).

2. The seat belt retraction structure of claim 1, wherein It also includes a child safety seat, the child safety seat includes a backrest (4) and a buckle (41) provided on the front side of the backrest (4), and the two self-contained safety belts (3) are detachably connected with the buckle (41).

3. The seat belt retraction structure of claim 1, wherein The shell (1) includes a lid (12), the lid (12) is covered with the base (11), first baffle (121) and second baffle (122) are arranged between the two end side walls of the lid (12), the first baffle (121) and the left side wall of the lid (12) form a first chamber, the first reel (22) is contained in the first chamber, the second baffle (122) and the right side wall of the lid (12) form a second chamber, and the second reel (23) is contained in the second chamber.

4. The seat belt retraction structure of claim 2, wherein The power assembly (5) comprises a coil spring (51) and a mounting seat (52), the coil spring (51) is mounted on the mounting seat (52), the mounting seat (52) is connected with the pin shaft (2) and rotates with the pin shaft (2), the pin shaft (2) realizes positive and reverse rotation following the expansion and contraction of the coil spring (51), when the two self-belt (3) are released and pulled out, the pin shaft (2) rotates positively and makes the coil spring (51) be forced to tighten until the two self-belt (3) are locked with the buckle (41) and the self-belt (3) is pulled tight under the spring force of the coil spring (51), when the two self-belt (3) are separated from the buckle (41), the pin shaft (2) realizes reverse rotation under the spring force of the coil spring (51) to drive the self-belt (3) to be wound.

5. The seat belt retraction structure of claim 2, wherein The locking assembly (6) comprises a gear plate (61) and interconnecting ratchet teeth (62) and torsion springs (63), the gear plate (61) is connected with the shell (1), the ratchet teeth (62) are connected with the pin shaft (2); when the speed is normal, the ratchet teeth (62) are spaced from the gear plate (61) under the spring force of the torsion springs (63) to realize the free rotation of the ratchet teeth (62) relative to the gear plate (61); when the speed is not normal, the ratchet teeth (62) are engaged with the gear plate (61) under the centrifugal force to limit the rotation of the pin shaft (2).

6. The seat belt retraction structure of claim 5, wherein The angle adjusting assembly (7) is further provided, the locking assembly (6) further comprises a flywheel (64) and a positioning seat (65), the positioning seat (65) connects the flywheel (64) and the pin shaft (2), the angle adjusting assembly (7) is adapted to lock the flywheel (64); when the angle of the chair back (4) is normal, the angle adjusting assembly (7) is spaced from the flywheel (64), the ratchet teeth (62) are spaced from the gear plate (61) under the spring force of the torsion springs (63) to realize the free rotation of the ratchet teeth (62) relative to the gear plate (61); when the angle of the chair back (4) is not normal, the angle adjusting assembly (7) is locked with the flywheel (64), the flywheel (64) drives the torsion springs (63) to twist to make the ratchet teeth (62) engage with the gear plate (61) to limit the rotation of the pin shaft (2).

7. The seat belt retraction structure of claim 6, wherein The angle adjusting assembly (7) comprises a locking block (71), a ball and a ball seat (72) for the ball to be placed, one end of the locking block (71) is hinged with the ball seat (72), the outer wall of the flywheel (64) is provided with a limiting tooth (641) in the circumferential direction; when the angle of the chair back (4) is not normal, the ball pushes against the locking block (71) to make the locking block (71) rotate relative to the ball seat (72) to realize the locking of the other end of the locking block (71) with the limiting tooth (641).

8. The seat belt retraction structure of claim 1, wherein Two safety belt outlets are arranged on the shell (1) at intervals, and the two safety belt outlets are respectively used for the two self-belt safety belts (3) to pass out.

9. A child safety seat, characterized in that A safety belt winding structure comprising a child seat according to any one of claims 1-8.

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