Crotch strap device and child safety seat
Patent Information
- Application Number
- DE102025100720P0
- Authority / Receiving Office
- DE · DE
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-02-05
- Filing Date
- 2025-01-10
- Publication Date
- 2025-07-17
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Technical FieldThe present disclosure relates to a step belt device and a child safety seat equipped therewith.BackgroundA child support such as a child safety seat is a seat specially designed for a child, and the child is usually secured in the child support during travel to improve the safety of the child during travel.A child support means may be equipped with a step belt device as a rule, and the high position of the existing step belt devices cannot be adjusted even if the height of some existing step belt devices can be adjusted. However, the adjustment method is complicated and not easy for the user to adjust, which affects the user experience.OverviewIn view of the foregoing, it is the object of the present disclosure to provide a step strap device and a child safety seat including the same, wherein the step strap device is conveniently height adjustable to meet the use requirements of users of different sizes or different ages.To this end, according to a solution of the present disclosure, there is provided a step belt device comprising: a limiting member; and a step belt having a first end and a second end opposite to the first end, the first end of the step belt being connected to the limiting member, the second end of the step belt being adapted to be fixed to a seat portion of a child support; an adjustment mechanism is disposed on the limiting member; and the position at which the first end of the step belt is connected to the limiting member is adjustable via the adjustment mechanism.According to an embodiment, the limiting member is provided with: a base portion having opposing first and second surfaces; a protective layer portion connected to and extending outward from the base portion, the first surface of the base portion facing the protective layer portion and the second surface of the base portion facing away from the protective layer portion; and a limiting stop defined between the base portion and the protective layer portion and for passing a seatbelt and limiting the seatbelt.According to one embodiment, the length of the protective layer portion in the longitudinal direction is less than the length of the base portion in the longitudinal direction.According to an embodiment, the lower end of the limiting member is provided with a connecting portion, the first end of the crotch belt is connected to the limiting member through the connecting portion, and the connecting portion is a through hole located at the lower end of the limiting member.According to an embodiment, the crotch belt has two branch belts between the restricting member and the seat portion, and the two branch belts are connected and arranged in an inverted V shape from the restricting member to the seat portion.According to an embodiment, the adjusting mechanism is used for adjusting the height of the position at which the first end of the crotch belt is connected to the limiting member in the up-and-down direction.According to an embodiment, the adjustment mechanism includes: a slide groove disposed at the base portion of the limiting member; a slide member connected to the first end of the step belt / belt and accommodated in the slide groove, the slide member being capable of sliding up and down along the slide groove; a plurality of first locking members are disposed at one of the base portion of the limiting member and the slide member, and the plurality of first locking members are disposed spaced apart in the up-down direction; a second locking member is disposed at the other of the base portion of the limiting member and the slide member, the second locking member being engaged with the corresponding first locking member when the slide member and the slide groove slide relative to each other; and an operating member connected to the first locking member or the second locking member, and when the operating member is operated, the first locking member and the second locking member are unlocked so that the sliding member can slide in the up-down direction relative to the sliding groove.According to an embodiment, one of the first locking elements and one of the second locking elements has a locking hole, wherein the other of the first locking elements and the second locking elements has a protrusion.According to an embodiment, the plurality of first locking members are disposed on the base portion of the limiting member, the second locking member is disposed on the sliding member, the operating member is connected to the second locking member, and the operating member may drive the sliding member to slide it in the up-down direction relative to the sliding groove.According to an embodiment, the plurality of first locking members are respectively disposed on the left side and the right side of the slide groove in the up-down direction.According to an embodiment, the adjustment mechanism further comprises an elastic member, and the elastic member abuts the second locking member to bias the second locking member to be engaged with the corresponding first locking member.According to an embodiment, two of the second locking members are provided and two of the operating members are provided to operate the two second locking members; the elastic member abuts between the two second locking members to bias the two second locking members to engage with the corresponding first locking members.According to one embodiment, the sliding element is plate-shaped and provided with: a crotch belt stop arranged at a lower end of the sliding element, wherein the first end of the crotch belt extends through the crotch belt stop and is connected to the limiting element via the sliding element; and a side opening arranged at at least one of the two sides of the sliding element, so that the second locking element can pass through there.According to an embodiment, the sliding member is provided with: a first opening disposed on the surface of the sliding member away from the sliding groove; a second opening disposed on the surface of the sliding member facing the sliding groove; the operating member includes: an operating end protruding from the first opening; and a connecting end passing through the sliding member and protruding from the second opening.According to one embodiment, the connecting end is in the form of an inverted buckle.According to an embodiment, the sliding member is provided with: a first opening disposed on the surface of the sliding member away from the sliding groove; and a second opening disposed on the surface of the sliding member facing the sliding groove, wherein the second locking member is disposed inside the sliding member, and the second locking member includes: a mounting opening aligned with the first opening and the second opening, and the connection end of the operating member is visible from the second opening after being passed through the first opening and the mounting opening, respectively; and a protrusion extending from at least one of both sides of the sliding member.According to an embodiment, two first openings are provided on the surface of the sliding element facing away from the sliding groove and one second opening is provided on the surface of the sliding element facing the sliding groove, and the first opening and the second opening are used for limiting the stroke of the actuating element.According to an embodiment, the second surface of the base portion is provided with an opening extending in the up and down direction, the operating member enters the slide groove through the opening, and the left side and the right side of the opening are disposed to protrude opposite to the left side and the right side of the slide groove to limit the slide member and prevent the slide member from coming off the slide groove through the opening.According to another embodiment, the adjusting mechanism includes: at least two limiting grooves disposed on one of the first surface and the second surface of the base portion of the limiting member at intervals in the up-down direction; at least two adjusting holes disposed corresponding to the at least two limiting grooves; a connecting groove communicating with each of the adjusting holes; and a buckle member disposed in each of the limiting grooves, wherein the first end of the step belt is connected to the buckle member and the step belt protrudes from the adjusting hole.According to another embodiment, the buckle element is a frame buckle with a central cross bar.According to another embodiment, the at least two limiting grooves comprise a first limiting groove and a second limiting groove, wherein the first limiting groove is arranged above the second limiting groove and the first limiting groove has a lateral opening.According to another embodiment, the protective layer portion of the delimiting element shields at least a part of the first delimiting groove.According to another embodiment, the second limiting groove is located at the lower end of the limiting element and has a lower opening.According to another embodiment, the size of the adjustment hole is smaller than that of the limiting groove.According to another embodiment, the adjusting mechanism includes: at least two adjusting rods disposed at the base portion of the limiting member at intervals in the up and down direction; a connecting buckle connected to the first end of the step belt and capable of being fastened to one of the at least two adjusting rods.According to another embodiment, the adjustment mechanism further includes: a support rod disposed at the base portion of the limiting member, and the first end of the crotch belt bypasses the support rod and is connected to the adjustment rod via the connection buckle.According to another embodiment, the connecting buckle has a bulging portion connected to the adjusting rod, and the cross section of the bulging portion is U-shaped.According to a further embodiment, the support rod spans the left and right ends of the base section of the limiting element and is located above the adjustment rod.According to another solution of the present disclosure, there is also provided a step belt device including a limiting member; a step belt connected to the limiting member and having a first end and a second end disposed opposite to the first end, the second end being fixed to a seat portion of the infant support means, and the position at which the step belt is connected to the limiting member being adjustable to adjust the height of the limiting member relative to the seat portion.According to an embodiment, the crotch belt device further comprises an adjustment mechanism disposed on the limiting member, wherein the first end of the crotch belt is connected to the limiting member via the adjustment mechanism, and the position at which the first end of the crotch belt is connected to the limiting member is adjustable via the adjustment mechanism.According to an embodiment, the limiting element is connected between the first end and the second end of the crotch belt / belt, and the position at which the crotch belt / belt is connected to the limiting element is adjustable via the first end.According to an embodiment, the crotch belt is a half-folded crotch belt, wherein the two free ends of the half-folded crotch belt are both the second end of the crotch belt and the half-folded part is the first end of the crotch belt.According to an embodiment, the step belt comprises a first belt and a second belt arranged one above the other, wherein a first end of the first belt and a first end of the second belt are both the second ends of the step belt and the second end of the first belt and the second end of the second belt are arranged one above the other to form the first end of the step belt.According to an embodiment, the crotch belt / belt comprises a first belt and a second belt arranged one above the other, wherein the first end of the first belt and the first end of the second belt both form the second end of the crotch belt / belt, the second end of the first belt is folded back to form a first fold-back portion, the second end of the second belt is folded back to form a second fold-back portion, and the first fold-back portion and the second fold-back portion overlap and are connected to form the first end of the crotch belt.According to an embodiment, the first end of the crotch belt is also provided with an insert for thickening the first end.According to an embodiment, the crotch belt device is also provided with a stop portion connected to the crotch belt to limit the end position at which the crotch belt is connected to the limiting member.According to an embodiment, the stop portion is arranged between the first end of the crotch belt / belt and the limiting element; and / or the stop portion is arranged between the second end of the crotch belt / belt and the limiting element.According to one embodiment, the crotch belt is connected to the delimiting element via a connecting element, wherein the connecting element is provided with a through-opening and the second end of the crotch belt is fastened to the seat section of the child carrier means after passing through the through-opening.According to an embodiment, the connecting element is also provided with anti-slip teeth.According to an embodiment, the connecting element is a seat buckle with a central cross bar, and the seat buckle with a central cross bar and the limiting element are formed in one piece.The present disclosure also provides a child safety seat comprising: a backrest portion and a seat portion, wherein the above-described step belt device is connected to the child safety seat, and a second end of a step belt of the step belt device is fixed to the seat portion.The adjustment mechanism of the step belt device according to the present disclosure can easily adjust the height of the restriction member relative to the seat portion of the child support, so that the adjustment mechanism can satisfy the different use requirements of children having different body sizes and different ages; moreover, the adjustment mechanism according to the present disclosure is disposed on the restriction member of the step belt device, so that the adjustment operation is more convenient.Brief Description of the FiguresThe accompanying drawings are included herein to provide a further understanding of the present invention and are incorporated in the specification to represent a part of the specification. The accompanying drawings illustrate embodiments of the present invention and are used in conjunction with the following description to explain the principles of the present invention.In the drawings: FIG. 1 is a schematic view of a child safety seat of the present disclosure with a step strap device attached thereto; FIG. 2 is another schematic view of the child safety seat of the present disclosure with a crotch belt device also attached thereto; FIG. 3 is a schematic view of a first embodiment of the step belt device of the present disclosure; FIGS. 4 aand 4 bare schematic views of front and rear sides, respectively, of a step belt device according to the first embodiment of the present disclosure; FIG. 5 is an exploded view showing a detailed structure of the step belt device of the first embodiment of the present disclosure; FIG. 6 is a schematic view of a base portion and a protective layer portion of a restricting member of the first embodiment of the present disclosure; FIG. 7 is a schematic view of the step belt device of the first embodiment of the present disclosure, with the base portion and the protective layer portion hidden and viewed from behind; FIG. 8 is a cross-sectional view of a step belt device of the first embodiment of the present disclosure; FIG. 9 ais a schematic view of a second embodiment of the step belt device of the present disclosure, showing the front side of the limiting member; FIG. 9 bis a schematic view of the second embodiment of the step belt device of the present disclosure, showing the back side of the restricting member; FIG. 10 is a schematic view of the step belt device of the second embodiment of the present disclosure with the step belt hidden; FIG. 11 is a cross-sectional view of the restricting member of the step belt device of the second embodiment of the present disclosure, wherein the protective sheet portion is cut off and viewed toward the first surface of the base portion; FIG. 12 is a schematic view of a third embodiment of the step belt device of the present disclosure, showing the front side of the restricting member; FIG. 13 is a schematic view of the third embodiment of the step belt device of the present disclosure, showing the back side of the restricting member; FIG. 14 is a schematic view of the front side of the restricting member of the step belt device of the third embodiment of the present disclosure; FIG. 15 is a partial cross-sectional view of the front side of the restricting member of the step belt device of the third embodiment of the present disclosure with the protective sheet portion cut off; FIG. 16 is an overall perspective view of the step belt device of the third embodiment of the present disclosure; FIG. 17 ais a schematic view of a fourth embodiment of the step belt device of the present disclosure, showing the front side of the step belt device; FIG. 17 bis a schematic view of the fourth embodiment of the step belt device of the present disclosure, showing the back side of the step belt device; FIG. 18 is a side cross-sectional view of the fourth embodiment of an adjustment mechanism of the step belt device of the present disclosure; FIG. 19 ais a schematic view of the step belt device of the fourth embodiment of the present disclosure, wherein the step belt is hidden and viewed from the front; FIG. 19 bis a schematic view of the step belt device of the fourth embodiment of the present disclosure, wherein the step belt is hidden and viewed from behind; FIG. 20 is a schematic view of the step belt device of a fifth embodiment of the present disclosure; FIG. 21 is a schematic view of an embodiment of the step belt of the step belt device of the fifth embodiment of the present disclosure; FIG. 22 is a schematic view of another embodiment of the step belt of the step belt device of the fifth embodiment of the present disclosure; FIG. 23 is a schematic view of a restricting member of the step belt device according to the fifth embodiment of the present disclosure, showing the front side of the restricting member; FIG. 24 is a schematic view of the restricting member of the step belt device of the fifth embodiment of the present disclosure, showing the back side of the restricting member; FIG. 25 is a schematic view of the step belt device of the fifth embodiment of the present disclosure, showing the restricting member in a higher position; and FIG. 26 is another schematic view of the step belt device of the fifth embodiment of the present disclosure; this figure shows the restricting member at a lower position.Reference numerals denote reference numerals1 Shoulder belt 2 Hip belt 10 Child safety seat 12 Headrest portion 14 Backrest portion 16 Seat portion 20 Step belt device 22 Limiting member 221 Base portion 221 aFirst surface 221 bSecond surface 222 Protective plate portion 223 Connecting portion 224 Limiting stopper 23 Step belt 231 First end 232 Second end 100 Adjusting mechanism 110 Sliding member 112 Step belt stopper 113 Lateral opening 114 First opening 115 Second opening 120 Second locking member 121 Protrusion 122 Fastening opening 130 Operating member 131 Operating end 132 Connecting end 140 Elastic member 150 Sliding groove 152 Rail 160 First locking member 200 Adjusting mechanism 220 Buckle member 250 First limiting member 251 Lateral opening 260 Second limiting member 261 Lower opening 270 Connecting groove 280 First adjusting hole 290 Second adjusting hole 300 Adjusting mechanism 320 Connecting buckle 321 Through opening 322 Bulging portion 350 First adjusting rod 360 second adjusting rod 370 support rod S 1 first direction S 2 second direction 20 step belt device 22 limiting element 23 step belt / belt 231 first end 232 second end 23 afirst step belt / belt 23 a 1 first end 23 a 2 second end 23 bsecond step belt / belt 23 b 1 first end 23 b 2 second end 23 c 1 first fold-back portion 23 c 2 second fold-back portion 235 insert 236 positioning portion 237 stopper portion 24 connecting element 241 through hole 242 anti-slip teethDetailed DescriptionHereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. While the present disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof will be shown by way of example in the accompanying drawings. However, the present disclosure should not be construed as being limited to the embodiments set forth herein, but instead to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the embodiments.In the following description, a child safety seat is given as an example, but it is understood that the step belt device according to the present invention is also applicable to other types of carriers such as a child's chair, a child's rocking chair, a baby's stroller or a wheelchair, etc.Moreover, in a child safety seat mountable in a vehicle, a child may be secured in the vehicle by a seat belt or a seat belt of the child safety seat. The step belt device provided in the present disclosure may adjust the effective length of the step belt and be connected to the seatbelt in a vehicle to limit the height of the seatbelt in the vehicle. As illustrated in FIG. 1, the step belt device 20 of the present disclosure is attached to a booster-type child safety seat, and the dotted lines in FIG. 1 show the in-vehicle seat belt including a shoulder belt 1 and a hip belt 2 in the vehicle. The hip strap 2 in the vehicle can be penetrated by the crotch strap device 20 for limiting purposes. Of course, the crotch belt device 20 may be used with other types of child-carrying means; the crotch belt device 20 may also be used in a seat belt of a child's seat with pant carrier belt (e.g., a five-point seat belt or a three-point seat belt) or other carrier, such that the crotch belt device 20 is connected to a shoulder belt or a hip belt on the child's seat with pant carrier belt or other carrier to adjust the length of the crotch belt.The following description and drawings will be illustrated with reference to a booster brand child safety seat and a step strap device in conjunction with a hip strap 2 in a vehicle.As shown in FIGS. 1 and 2, FIG. 1 is a schematic view showing a child safety seat 10 of the present disclosure, and FIG. 2 is another schematic view showing the child safety seat 10 of the present disclosure. The child safety seat 10 is provided with a step belt device 20. The step belt device 20 according to the present disclosure includes a limiting member 22 and a step belt 23, wherein the hip belt 2 of the vehicle can pass through the limiting member 22 of the step belt device 20 to limit 0, and the shoulder belt 1 of the vehicle passes through the backrest portion 14 and the headrest portion 12 to restrain the body of a child that abuts the backrest portion 14 of the child safety seat 10. The limiting member 22 according to the present disclosure may be a protective film type limiting member (as shown in FIGS. 1 and 2 ) or a buckle type limiting member (not shown) suitable for use in a seat belt of a pants-type child safety seat or a combination of a protective film type limiting member and a buckle type limiting member so that it can be switched from a mode in which it is attached to a seat belt of a booster seat means to a mode in which it is attached to a seat belt of a pants-type child safety seat. The step belt 23 according to the present disclosure may be in the form of a webbing, for example.The crotch belt 23 comprises opposing first and second ends 231, 232, wherein the first end 231 is connected to the limiting element 22 and the second end 232 is fastened to the seat portion 16 of the child safety seat 10, for example by a frame buckle having a middle crossbar or a loop knot. The second end 232 of the crotch strap 23 is removable from the seat portion 16 to remove the crotch strap device 20 from the infant support means. The crotch belt 23 shown in FIGS. 1 and 2 has two branch straps between the limiting element 22 and the seat section 16, which are connected and arranged in an inverted V-shape from the limiting element 22 towards the seat section 16, but are not limited thereto. Depending on the actual need, the crotch belt 23 can also be provided with only one or more than two branch belts. As shown in FIGS. 1 and 2, the seat portion 16 has an elongated hole through which the second end 232 of the crotch belt 23 passes, the elongated hole being substantially perpendicular to the width direction (i.e., the left-right direction) of the seat portion. The crotch belt 23 is twisted between the limiting member 22 and the seat portion 16, the wide side of the crotch belt 23 in the vicinity of the first end 231 is parallel to the width direction of the seat portion 16, and the wide side of the crotch belt 23 in the vicinity of the second end 232 is perpendicular to the width direction of the seat portion 16.The step belt device 20 according to the present disclosure further includes an adjustment mechanism provided on the limiting member 22. By the adjustment mechanism, the position at which the first end 231 of the crotch belt 23 is connected to the limiting member 22 can be adjusted, whereby the height of the limiting member 22 relative to the child safety seat 10 can be adjusted. In this way, the effective length of the crotch belt 23 can be adjusted by the adjusting mechanism, so that the position of the hip belt 2 can be adjusted, thereby improving the safety of the child during travel and increasing the applicable age or height of the children even when a smaller or more recent child is riding on the child safety seat 10.Specifically, a first embodiment of the adjustment mechanism of the step belt device 20 according to the present disclosure will be explained below with reference to FIGS. 3, 4 a, 4 b, 5, in which FIG. 3 is a schematic view of the first embodiment of the step belt device of the present disclosure; FIGS. 4 aand 4 bare schematic views of front and back of the step belt device of the first embodiment of the present disclosure; FIG. 5 is an exploded view showing a detailed structure of the step belt device of the first embodiment of the present disclosure. For convenience of illustration, in the following description, the front side of the step belt device 20 is the surface thereof facing the outside of the child seat, while the back side of the step belt device 20 is the surface thereof facing the backrest portion 14 of the child seat; also, the front side of the restricting member 22 is the surface thereof facing the outside of the child seat, and the back side of the restricting member 22 is the surface thereof facing the backrest portion 14 of the child seat. In both FIGS. 1 and 2, the front sides of the crotch belt device 20 and of the delimiting element 22 are illustrated.In combination with FIG. 6, FIG. 6 is a schematic diagram of a base portion and a protective sheet portion of the limiting member of the first embodiment of the present disclosure, wherein the limiting member 22 includes a base portion 221 and a protective sheet portion 222, wherein the base portion 221 includes a first surface 221 aand a second surface 221 bopposed to each other, wherein the first surface 221 aof the base portion 221 faces the protective sheet portion 222, and the second surface 221 bof the base portion 221 is away from the protective sheet portion 222. Between the base portion 221 and the protective layer portion 222, a limit stopper 224 is defined. In this embodiment, when the step harness device 20 is attached to the child safety seat, the second surface 221 bof the base portion 221 faces the backrest portion 14 of the child safety seat 10 while the protective layer portion 222 extends from the base portion 221 and faces the outside of the child safety seat 10 (as shown in FIGS. 1 and 2 ); in other embodiments, it may be substituted that the protective layer portion 222 extends from the base portion 221 and faces the backrest portion 14 of the child safety seat 10, and the second surface 221 bof the base portion 221 faces the outside of the child safety seat 10. The hip belt 2 of the vehicle is passed through the limit stopper 224 so that the hip belt 2 is limited by the step belt device 20 to prevent the hip belt 2 from moving to an excessively high position. According to the embodiment shown in FIG. 6, the longitudinal length of the protective layer portion 222 is less than the longitudinal length of the base portion 221. The lower end of the limiting element 22 is also provided with a connecting portion 223, by which the first end of the crotch belt 23 is connected to the limiting element 22. The connecting portion 223 illustrated in FIG. 6 is in the form of a through hole through which the first end of the crotch belt 23 extends into the restricting member 22.Referring to FIG. 5 in combination, the adjustment mechanism 100 according to the first embodiment includes a slide groove 150, a slide member 110, a first locking member 160, a second locking member 120, and an operating member 130. The slide groove 150 is disposed at a base portion 221 of the limiting member 22; the slide member 110 is connected to the first end 231 of the step belt 23, the slide member 110 is accommodated in the slide groove 150, and the slide member 110 can slide up and down along the slide groove 150. As illustrated in FIGS. 5 and 6, the second surface 221 bof the base portion 221 is provided with an opening that extends in the up-and-down direction and through which the operation member 130 enters the slide groove 150, and the left and right sides of the opening protrude in the opposite direction with respect to the left and right sides of the slide groove 150 to limit the slide member 110 and prevent the slide member 110 from being separated from the slide groove 150. In other words, the left and right sides of the opening project relative to the left and right sides of the slide groove 150 toward each other (the left and right widths of the opening is smaller than the left and right widths of the slide groove), so that the left and right sides of the slide groove 150 may each include a rail 152, and the both sides of the slide member 110 may be partially accommodated in the rail 152. The slider 110 slides up and down along the rail 152 to prevent the slider 110 from falling down. According to the embodiment shown in FIG. 5, a plurality of first locking members 160 are disposed on the base portion 221 of the restricting member 22 and are disposed at intervals along the up-and-down direction, and the second locking member 120 is disposed on the sliding member 110. However, this is not limited thereto. In other embodiments, the plurality of first locking members 160 may also be disposed on the slide member 110, and the second locking members 120 are disposed on the base portion 221 of the limiting member 22 as long as the second locking members 120 are engaged with the corresponding first locking members 160 when the slide member 110 and the slide groove 150 slide relative to each other.The operating member 130 is connected to the first locking member 160 or the second locking member 120, and when the operating member 130 is operated, the first locking member 160 and the second locking member 120 are unlocked to allow the slide member 110 to slide in the up-and-down direction relative to the slide groove 150.In the embodiment shown in FIG. 5, the plurality of first locking members 160 have locking holes and are disposed on the base portion 221 of the restricting member 22; the second locking member 120 has a protrusion 121, the second locking member 120 is disposed on the slide member 110, and the operating member 130 is connected to the second locking member 120 so that the operating member 130 drives the slide member 110 to slide in the up-down direction relative to the slide groove 150. However, this is not limited thereto. It is also possible that the first locking element 160 has a protrusion while the second locking element 120 has a locking hole.The sliding element 110 can be plate-shaped, for example, and can be provided with a crotch belt stop 112, a lateral opening 113, a first opening 114 and a second opening 115 (the second opening 115 is illustrated in FIG. 7 ). The crotch belt stopper 112 is disposed at the lower end of the slide member 110. A first end 231 of the crotch belt 23 is passed through the crotch belt stopper 112, so that the crotch belt 23 can be connected to the limiting member 22 by the sliding member 110, and the crotch belt 23 can be slid up and down along the sliding groove 150 together with the sliding member 110. The first opening 114 of the sliding member 110 is disposed on a surface of the sliding member 110 that is away from the sliding groove 150 (in other words, the first opening 114 of the sliding member 110 is disposed on a surface of the sliding member 110 that is away from the protective layer portion 222), and the second opening 115 of the sliding member 110 is disposed on a surface of the sliding member 110 that faces the sliding groove 150 (in other words, the second opening 115 of the sliding member 110 is disposed on a surface of the sliding member 110 near the protective layer portion 222). The second locking member 120 may be disposed in the slide member 110, wherein the second locking member 120 may include a fastening hole 122 in addition to the protrusion 121, and the protrusion 121 may extend outward from the side hole 113 of the slide member 110 to engage with the first locking members 160 distributed on both sides of the slide groove 150. The attachment aperture 122 is aligned with the first aperture 114 and the second aperture 115 of the slider 110 to facilitate use of the actuator 130, which will be described below.The operating member 130 includes an operating end 131 and a connecting end 132 as illustrated in FIGS. 4 band 7, wherein FIG. 7 is a schematic view of the step belt device of the first embodiment of the present disclosure, the base portion and the protective sheet portion being hidden and viewed from behind. The operation end 131 of the operation member 130 is accessible from the first opening 114 of the slide member 110, and the connection end 132 of the operation member 130 is exposed from the second opening 115 of the slide member 110 after being successively passed through the first opening 114 of the slide member 110 and the attachment opening 122 of the second lock member 120. According to the embodiment shown in FIG. 5, the connecting end 132 is in the form of an inverted buckle.The adjustment mechanism 100 further includes an elastic member 140, and the elastic member 140 abuts the second locking member 120 to press the second locking member 120 such that the protrusion 121 of the second locking member 120 is biased to engage with the corresponding first locking member 160.In the embodiment shown in FIG. 5, two second locking elements 120 are provided, and accordingly, two actuating elements 130 are also provided to actuate the two second locking elements 120. Two lateral openings 113 and two first openings 114 of the sliding element 110 are also provided. The resilient member 140 abuts between the two second locking members 120 to bias the two second locking members 120 to engage with the corresponding first locking members 160. However, it is not limited thereto. Only one sliding element 110 and one actuating element 130 are provided. The number of the plurality of first locking members 160 may be adjusted according to the requirements of the various adjustment positions. The first locking member 160 may be disposed on both left and right sides of the slide groove 150, or only on one side or other positions of the slide groove 150.Next, the adjusting operation of the adjusting mechanism 100 according to the first embodiment will be described with reference to FIG. 8, where FIG. 8 is a cross-sectional view of the step belt device according to the first embodiment of the present disclosure. At this time, as shown in FIG. 8, the protrusion 121 of the second locking member 120 is engaged with the first locking member 160 located at the lowermost end of the slide groove 150, and the slide member 110 is located at a position at the lower end in the slide groove 150. At this time, the entire step strap device 20 is in a higher position with respect to the child seat 10, and the step strap device 20 is suitable for larger or older children in this position. When the operation end 131 of the operation member 130 is pressed in the first direction of the first arrow S 1, the elastic member 140 is compressed, so that the protrusion 121 of the second locking member 120 disengages from the first locking member 160. The operating end 131 of the operating element 130 is further operated in the direction of the second arrow S 2 such that the sliding element 110 slides together with the second locking element 120 and the first end 231 of the crotch belt 23 in the second direction S 2 until the corresponding height is reached, then the operating end 131 of the operating element 130 is released. At this time, the protrusion 121 of the second locking member 120 is extended again to engage with the corresponding first locking member 160 under the elastic force of the elastic member 140. At this time, the entire crotch strap device 20 is in a lower position relative to the infant seat 10, and the crotch strap device 20 is suitable for use by smaller or more young children in this position.The two first openings 114 and the one second opening 115 provided on the sliding member 110 may be used in addition to assembling the operating member 130 to limit the stroke of the operating member 130. For example, the two first openings 114 limit the stroke of the operating member 130 when the operating member 130 presses the elastic member 140 to move along the first direction S 1; and since the connection end 132 of the operating member 130 passes through the second opening 115, the second opening 115 can limit the stroke of the operating member 130 in the direction opposite to the direction of the first arrow S 1 by the elastic force of the elastic member 140. Of course, two second openings 115 may be provided, while one first opening 114 may be provided, but is not limited thereto.The adjusting mechanism 100 based on this embodiment is provided on the limiting member 22 of the step belt device 20, so that the adjusting operation is easier.An adjustment mechanism 200 according to a second embodiment will be described below with reference to FIGS. 9 a, 9 b, 10, and 11, and the same parts of the second embodiment as in the first embodiment will not be described again. FIG. 9 ais a schematic view of a second embodiment of the step belt device of the present disclosure showing the front side of the limiting member; FIG. 9 bis a schematic view of the second embodiment of the step belt device of the present disclosure showing the back side of the limiting member; FIG. 10 is a schematic view of the step belt device of the second embodiment of the present disclosure with the step belt hidden; FIG. 11 is a cross-sectional view of the limiting member of the step belt device of the second embodiment of the present disclosure with the protective layer portion cut off and viewed toward the first surface of the base portion; the adjusting mechanism 200 of the second embodiment comprises at least two limiting grooves and, in the embodiment of FIGS. 9 aand 9 b, a first limiting groove 250 and a second limiting groove 260, wherein the first limiting groove 250 is arranged above the second limiting groove 260. In this embodiment, the second limiting groove 260 is located at the lower end of the limiting member 22, but is not limited thereto, and the number of limiting grooves may be set according to requirements for the various setting positions. As shown in FIG. 9 a, the first limiting groove 250 and the second limiting groove 260 are disposed on the first surface 221 aof the base portion 221 of the limiting member 22, and the protective sheet portion 222 of the limiting member 22 covers at least a part of the first limiting groove 250. As shown in FIG. 9 b, the base portion 221 of the restriction member 22 is also provided with a first adjustment hole 280 and a second adjustment hole 290, the first adjustment hole 280 and the second adjustment hole 290 penetrating through the first surface 221 aand the second surface 221 bof the base portion 221, the first adjustment hole 280 corresponds to the first restriction groove 250 in the position, the second adjustment hole 290 corresponds to the second restriction groove 260 in the position. The sizes of the first restricting groove 250 and the second restricting groove 260 are larger than those of the first adjusting hole 280 and the second adjusting hole 290, respectively. The buckle member 220 may be mounted in the first limiting groove 250 and the second limiting groove 260, and the crotch belt 23 extends from the second surface 221 bof the base portion 221. The buckle element 220 may be, but is not limited to, a mid-crossbar buckle.The adjustment mechanism 200 is also provided with a connection groove 270, and the connection groove 270 communicates with the first adjustment hole 280 and the second adjustment hole 290. Since the first adjustment hole 280 corresponds in position to the first limiting groove 250, the second adjustment hole 290 corresponds in position to the second limiting groove 260, the first adjustment hole 280 communicates with the first limiting groove 250, and the second adjustment hole 290 communicates with the second limiting groove 260, the communication groove 270 also communicates with the first limiting groove 250 and the second limiting groove 260.As shown in FIG. 9 b, the first end 231 of the step belt 23 is connected to the buckle member 220, the buckle member 220 is mounted in, for example, the second limiting groove 260, and the step belt 23 is led out from the second adjustment hole 290. In the position shown in Figure 9b, the buckle element 220 together with the crotch belt 23 is at the lower end of the limiting element 22, at which time the entire crotch belt device 20 is in a higher position with respect to the child's safety seat 10, said crotch belt device 20 in this position being suitable for children of larger height or age. When the position of the step belt device 20 needs to be adjusted, the buckle member 220 is originally located in the second limiting groove 260, and the step belt 23 needs to be shortened, the buckle member 220 may be first removed from the second limiting groove 260. The buckle member 220 is rotated and adjusted (or the step belt 23 may be directly adjusted) so that the step belt 23 conforms to the extending direction of the connection hole 270. The step belt 23 may be guided to the first adjustment hole 280 through the buckle member 220 through the connection hole 270 (or the step belt 23 may be directly pulled to move to the first adjustment hole 280), and then, after the position of the buckle member 220 is rotated and adjusted, the step belt 23 is tightened and the buckle member 220 is connected to the first limiting groove 250. At this time, the entire crotch strap device 20 is in a lower position relative to the child seat 10, and the crotch strap device 20 is suitable for smaller or more young children in this position.In order to facilitate removal of the buckle member 220 from or locking to the first limiting groove 250, as shown in FIG. 11, the first limiting groove 250 has a lateral opening 251 to allow a user to operate the buckle member 220 located in the first limiting groove 250 at the lateral opening 251 to further improve operability, particularly in the case where the protective layer portion 222 covers the first limiting groove 250. The second limiting groove 260 has a lower opening 261 so that a user can operate the buckle member 220 located in the first limiting groove 250 at the lower opening 261, thereby further improving the operability.A third embodiment of the step belt device 20 will be described next with reference to FIGS. 12 to 16, wherein FIG. 12 is a schematic view of a third embodiment of the step belt device of the present disclosure showing the front side of the limiting member; FIG. 13 is a schematic view of the third embodiment of the step belt device of the present disclosure showing the back side of the limiting member; FIG. 14 is a schematic view of the front side of the limiting member of a step belt device of the third embodiment of the present disclosure; FIG. 15 is a partial cross-sectional view of the front side of the limiting member of the step belt device of the third embodiment of the present disclosure with the protective layer portion cut off; and FIG. 16 is an overall perspective view of the step belt device of the third embodiment of the present disclosure. The adjusting mechanism of the third embodiment has substantially the same structure as the adjusting mechanism of the second embodiment, except that in the third embodiment, a first restricting groove 250 and a second restricting groove 260 are disposed on the second surface 221 bof the base portion 221 of the restricting member 22, as illustrated in FIG. 13. In this way, when adjusting the connection position of the step belt 23, the buckle element 220 can be removed from the second surface 221 bof the base portion 221 of the limiting member 22, and the buckle element 220 can be re-engaged with the corresponding limiting groove from the second surface 221 bwhen the buckle element 220 is adjusted to the proper position. Since the second surface 221 bof the base portion 221 of the restricting member 22 is not blocked by the protective sheet portion 222, the above adjusting operation is more convenient.In addition, as illustrated in FIG. 16, the lower end of the base portion 221 of the restriction member 22 is provided with a connecting portion 223, and the connecting portion 223 is in the shape of a through hole and communicates with the second adjustment hole 290 to allow the step belt 23 to pass therethrough. As shown in FIGS. 14 and 16, the lower end of the base portion 221 is thickened so that the lower end of the base portion 221 forms a connecting portion 223 in the form of a through hole, and the connecting portion 223 may be, for example, a rectangular through hole to limit the movement of the crotch belt 23, but is not limited thereto.The adjustment mechanism 200 according to this embodiment can also easily adjust the height position of the limiting member 22 to provide the corresponding height position of the hip strap for children of different body sizes and different ages, thereby improving safety.An adjustment mechanism 300 according to a fourth embodiment will be described next with reference to FIGS. 17 a, 17 b, 18, wherein FIG. 17 ais a schematic view of a fourth embodiment of the step belt device of the present disclosure showing the front side of the step belt device; FIG. 17 bis a schematic view of the fourth embodiment of the step belt device of the present disclosure showing the back side of the step belt device; FIG. 18 is a lateral cross-sectional view of the fourth embodiment of an adjustment mechanism of the step belt device of the present disclosure. The adjustment mechanism 300 of the fourth embodiment is disposed on the second surface 221 bof the base portion 221 of the limiting member 22, and includes a support rod 370, a first adjustment rod 350, and a second adjustment rod 360. Two adjustment rods are shown in Figs. 17b and 18, but not limited thereto, an appropriate number of adjustment rods can be adjusted according to requirements of the various adjustment positions. The first adjustment rod 350 is disposed at an upper position of the base portion 221 of the limiting member 22, and the second adjustment rod 360 is disposed at a lower position of the base portion 221 of the limiting member 22. The support rod 270 is disposed at the base portion 221 of the limiting member 22 and above the first adjustment rod 350. The adjustment mechanism 300 further includes a connection buckle 320 as shown in FIG. 18, wherein the first end 231 of the crotch belt 23 is connected to the connection buckle 320. The crotch belt 23 is engaged by the connecting buckle 320 with a second adjusting rod 360 located at a lower portion of the base portion 221 of the limiting member 22 after bypassing the support rod 270 located at an upper portion of the base portion 221 of the limiting member 22.According to another embodiment, the support rod 270 may be omitted and the first end 231 of the crotch belt 23 may be directly fastened with various adjustment rods.Referring back to FIGS. 19 aand 19 b, FIG. 19 ais a schematic front view of the step belt device of the fourth embodiment of the present disclosure with the step belt hidden and view; and 19 bis a schematic front view of the step belt device of the fourth embodiment of the present disclosure with the step belt hidden and view. In this embodiment, the connecting portion 223 of the limiting member 22 is in the form of an outlet through which the crotch belt 23 enters the adjusting mechanism 300, and after bypassing the support rod 370 upward, the crotch belt 23 can be selectively engaged with the first adjusting rod 350 or the second adjusting rod 360 via the connecting buckle 320. As shown in FIGS. 18 and 19 b, the connecting buckle 320 includes a through hole 321 to which the first end 231 of the crotch belt 23 can be connected. In addition, the connection buckle 320 includes a bulging portion 322, and according to this embodiment, the portion of the bulging portion 322 is U-shaped to allow the first adjustment rod 350 or the second adjustment rod 360 to be more snap-engaged.In the embodiment shown in FIG. 19 b, the support rod 370 spans both the left and right ends of the base portion 221 of the limiting member 22, i.e., the support rod 370 is connected to the left and right ends of the base portion 221, and the first adjustment rod 350 and the second adjustment rod 360 extend only from the left end or from the right end of the base portion 221. But not limited thereto, and other connection forms are also possible.Based on the adjustment mechanism 300 of the fourth embodiment, as illustrated in FIG. 18, the connection buckle 320 engages the second adjustment rod 360, and since the step strap 23 bypasses the support rod 370, the entire step strap device 20 is disposed at a lower position with respect to the child safety seat 10 at this time, and the step strap device 20 is suitable for smaller or more young children at this position. When the position of the crotch belt device 20 needs to be adjusted, the connecting buckle 320 is removed from the second adjusting rod 360 and moved upward to engage the first adjusting rod 350. At this point, the crotch belt 23 extends further outward from the connecting portion 223, and the entire crotch belt device 20 is in a higher position with respect to the child safety seat 10, and the crotch belt device 20 is suitable for larger or older children in this position.The adjustment mechanism of this embodiment can also conveniently adjust the height of the limiting member 22 relative to the child safety seat to meet different requirements of children with different body sizes and ages, thus providing safety.In each of the above embodiments, a part of the crotch belt 23 (hereinafter referred to as a first extension belt) may be disposed between the restricting member 22 and the seat portion of the child support, this part determining the height of the restricting member 22 relative to the seat portion of the child support; another part of the crotch belt 23 (hereinafter referred to as a second extension belt) can be connected to the limiting member 22 and is located inside the limiting member 22. by adjusting the position at which the first end 231 of the crotch belt 23 is connected to the limiting member 22 by the adjusting mechanism, the first extension belt and the second extension belt are slid with each other, whereby it can be adjusted whether the material of the second extension belt of the crotch belt 23 is enlarged or reduced, thereby controlling whether the material of the first extension belt is reduced or enlarged, and further achieving the purpose of adjusting the effective length of the crotch belt 23 and the height of the limiting member 22 relative to the seat portion of the infant support.In each of the above embodiments, the adjustment mechanism is used to adjust the height in the up and down direction of the position at which the first end 231 of the crotch belt 23 is connected to the limiting member 22.The step belt device 20 according to a fifth embodiment of the present disclosure will be described next with reference to FIG. 20. FIG. 20 is a schematic view of the step belt device 20 of a fifth embodiment of the present disclosure. As illustrated in the drawing, the crotch belt 23 connected to the restricting member 22 has a first end 231 and a second end 232 disposed opposite to the first end 231, the second end 232 of the crotch belt 23 is a fixed end and fixed to the seat portion 16 of the child safety seat 10, and the restricting member 22 is connected (movably) between the first end 231 and the second end 232 of the crotch belt 23. The position at which the crotch belt 23 is connected to the limiting member 22 can be adjusted by the first end 231 of the crotch belt 23.As shown in FIG. 21, it is a schematic view of an embodiment of the step belt 23 of the step belt device 20 of a fifth embodiment of the present disclosure. The crotch belt 23 in this embodiment is a half-folded crotch belt 23, and both free ends of the half-folded crotch belt 23 are the second ends 232 of the crotch belt 23. The two second ends 232 of the crotch belt 23 are secured to the seat portion 16 by a mechanism such as a seat buckle having a center cross bar or an arch knot. The half-folded part of the crotch belt 23 after the half-folding is the first end 231 of the crotch belt 23, and the first end 231 is an adjusting end with which the position at which the crotch belt 23 is connected to the restricting member 22 can be adjusted. In addition, as shown in FIG. 21, an insert 235 may be connected to the half-folded part of the crotch belt 23 so that the first end 231 of the crotch belt 23 may be thickened to prevent the first end 231 of the crotch belt 23 from coming off the restricting member 22. The insert 235 may be made of a webbing or may be a plastic member, a sheet metal, etc. Further, a positioning portion 236 may be provided to fix the insert 235 and the half-folded part of the crotch belt 23. The positioning portion 236 may be, for example, a suture or an adhesive, and the positioning portion 236 may be provided at one or more positions as needed.In addition, as shown in FIG. 21, the step belt device 20 is also provided with a stopper portion 237, the stopper portion 237 being connected to the step belt 23. The stop portion 237 illustrated in the drawing is located between one of the second ends 232 of the crotch belt 23 and the position at which the crotch belt 23 is connected to the limiting member 22, and the stop portion 237 may define the limit position at which the crotch belt 23 is connected to the limiting member 22, i.e., the lowest position of the limiting member 22. the position of the stop portion 237 is not limited to this position, and it is also possible to provide the stop portion 237 between the two second ends 232 of the crotch belt 23 and the position at which the crotch belt 23 is connected to the limiting member 22, in which case the stop portions 237 need to be aligned. Of course, the stopper portion 237 may be disposed between the first end 231 of the crotch belt 23 and the limiting member 22, and a plurality of stopper portions 237 may be disposed between the first end 231 of the crotch belt 23 and the limiting member 22 and between the second end 232 of the crotch belt 23 and the limiting member 22.FIG. 22 shows another embodiment of the step belt 23 of the step belt device 20 of the fifth embodiment of the present disclosure. As shown in FIG. 22, the crotch belt 23 includes a first belt 23 aand a second belt 23 bdisposed one above the other, and a first end 23 a 1 of the first belt 23 aand a first end 23 b 1 of the second belt 23 bare both the second ends 232 of the crotch belt 23, i.e., the fixed end of the crotch belt 23, As illustrated in FIG. 22, the second end 23 a 2 of the first belt 23 ais folded back to form a first fold-back portion 23 c 1, the second end 23 b 2 of the second belt 23 bis folded back to form a second fold-back portion 23 c 2, and the first fold-back portion 23 c 1 and the second fold-back portion 23 c 2 overlap and are joined to form the first end 232 of the crotch belt 23, That is, the adjustable end of the crotch belt 23 is not limited to this, and the second end 23 a 2 of the first belt 23 aand the second end 23 b 2 of the second belt 23 bmay be directly connected to each other to form the first end 232 of the crotch belt 23.Although not illustrated in the drawings, in the embodiment shown in FIG. 22, and in the embodiment in which the second end 23 a 2 of the first belt 23 aand the second end 23 b 2 of the second belt 23 bare overlapped and directly joined one above the other to form the first end 231 of the crotch belt 23, an insert 235 may also be disposed at the first end 231 of the crotch belt 23 to form a thickened first end 231. Further, a positioning portion 236 may also be provided to fix the insert 235, the second end 23 a 2 of the first belt 23 aand the second end 23 b 2 of the second belt 23 b; likewise, a stop portion 237 may be disposed between the second end 232 of the crotch belt 23 and the limiting member 22 to define the limit position at which the crotch belt 23 is connected to the limiting member 22.Next, a specific structure of the restricting member 22 according to the present disclosure will be described with reference to FIGS. 23 and 24, in which FIG. 23 is a schematic view of a restricting member of the step belt device of the fifth embodiment of the present disclosure showing the front side of the restricting member, and FIG. 24 is a schematic view of the restricting member of the step belt device of the fifth embodiment of the present disclosure showing the back side of the restricting member. The restricting member 22 of this embodiment also includes a base portion 221 and a protective sheet portion 222. From the situation illustrated in FIGS. 23 and 24, the connecting member 24 and the lower end of the restricting member 22 are integrally formed and connected to the base portion 221, but are not limited thereto. The connecting element 24 and the delimiting element 22 can be connected to one another in another manner. The crotch belt 23 is connected to the limiting member 22 by a connecting member 24, the connecting member 24 is provided with a through hole 241, and the second end 232 of the crotch belt 23 is fixed to the seat portion 16 of the child safety seat 10 after passing through the through hole 241. According to one of the embodiments, the connecting member 24 is a middle cross bar buckle and has two through holes 241 (upper through hole and lower through hole), and the second end 232 of the step belt 23 is fixed to the seat portion 16 after being passed through the two through holes 241 one by one. The connecting element 24 is also provided with anti-slip teeth 242 in order to increase the friction between the crotch belt 23 and the connecting element 24 and to prevent unintentional slipping of the crotch belt 23. The anti-slip teeth may be disposed on the surface of the rod body between the upper through hole 241 and the lower through hole 241, and may also be disposed on the edge of at least one of the two through holes 241.It should be noted that, in the embodiment shown in Figs. 20 to 26, the crotch belt 23 has two second ends 232 fixed at two positions to the seat portion 16 of the child support means, and the two branch straps of the crotch belt 23 are disposed between the restricting member 22 and the seat portion 16 and in an inverted V shape from the restricting member 22 to the seat portion 16. At least two layers of the crotch belt are simultaneously passed through the through hole 241. However, this is not limited thereto. In other embodiments, the crotch belt 23 may consist of only one or more than two branch straps depending on actual need; for example, the two second ends 232 of the crotch belt 23 may be attached to the seat portion 16 at the same location without being connected to the seat portion 16 at two locations, or the crotch belt 23 may have only one second end 232 connected to the seat portion 16.It should be noted that the stopper portion 237 may be made of a webbing and formed as a webbing knot (for example, a part of a webbing may be stacked and sewn together to be fixed as the restricting member 237, and the other part of the webbing forms at least a part of the crotch belt 23; or the crotch belt 23 and the restricting member 237 are formed by at least two webbings separated and connected by a sewing thread), or the restricting member 237 may be made of a resin member, a metal sheet, etc. and connected to the crotch belt 23 by a sewing thread, an adhesive, etc.Next, the adjusting operation of the step belt device 20 according to the fifth embodiment will be described with reference to FIGS. 25 and 26, in which FIG. 25 is a schematic view of the step belt device 20 of the fifth embodiment of the present disclosure showing the restricting member 22 at a higher position, at which point the first end 231 of the step belt 23 is pulled out to a shorter length; and FIG. 26 is another schematic view of the step belt device 20 of the fifth embodiment of the present disclosure showing the restricting member 22 at a lower position, in which the first end 231 of the step belt 23 is pulled out to a longer length. When it is necessary to shift the restricting member 22 from the upper position shown in FIG. 25 to the lower position shown in FIG. 26, the first end 231 of the crotch belt 23 is simply pulled downward, and the position at which the crotch belt 23 is connected to the connecting member 24 is changed by pulling the first end 231 of the crotch belt 23, whereby the height of the restricting member 22 can be changed more easily.In summary, in the solution of the present disclosure, the connection position between the crotch belt 23 and the limiting member 22 is adjustable to adjust the height of the limiting member 22 relative to the seat portion 16, and as compared to the adjustment of the effective length of the crotch belt 23 by adjusting the connection position between the seat portion 16 and the crotch belt 23, the solution of the present disclosure is more convenient for the user to operate to adjust the effective length of the crotch belt 23 and thereby adjust the height of the limiting member 22.As the features of the invention may be embodied in various forms without departing from the features of the invention, it should also be understood that the above-mentioned embodiments are not limited to the details described above unless otherwise stated and that they should be construed broadly to fall within the scope defined by the appended claims. Therefore, all modifications and changes which fall within the scope and limits of the claims, or equivalent solutions to that scope and limits, are intended to be covered by the appended claims.
Claims
A crotch belt device (20) comprising: a limiting member (22); and a crotch belt (23) having a first end (231) and a second end (232) disposed opposite the first end (231), wherein the first end (231) of the crotch belt (23) is connected to the limiting member (22), wherein the second end (232) of the crotch belt (23) is configured to be fixed to a seat portion (16) of a child support; an adjustment mechanism (100, 200, 300) disposed on the limiting member (22), and wherein the position at which the first end (231) of the crotch belt (23) is connected to the limiting member (22) is adjustable by the adjustment mechanism (100, 200, 300).The crotch belt device (20) according to claim 1, wherein the adjusting mechanism (100) comprises: a slide groove (150) disposed on the base portion (221) of the limiting member (22); a slide member (110) connected to the first end (231) of the crotch belt (23) and accommodated in the slide groove (150), the slide member (110) being slidable up and down along the slide groove (150); a plurality of first locking members (160) disposed on one of the group of the base portion (221) of the limiting member (22) and the slide member (110), the plurality of first locking members (160) being spaced apart in the up-down direction; a second locking member (120) disposed on the other of the base portion (221) of the limiting member (22) and the sliding member (110), the second locking member (120) being engaged with the corresponding first locking member (160) when the sliding member (110) and the sliding groove (150) slide relative to each other; and an operating member (130) connected to the first locking member (160) or the second locking member (120), and wherein upon an operation of the operating member (130), the first locking member (160) and the second locking member (120) are unlocked to release the sliding of the sliding member (110) in the up and down direction relative to the sliding groove (150).The crotch belt device (20) of claim 1 or 2, wherein the constraining member is formed with: a base portion having opposing first and second surfaces; a protective layer portion connected to and extending outwardly from the base portion, the first surface of the base portion facing the protective layer portion and the second surface of the base portion facing away from the protective layer portion; and a limit stop defined between the base portion and the guard layer portion, wherein the limit stop is used for passing a seat belt therethrough and limiting the seat belt, and wherein in particular the plurality of first locking members (160) are disposed on the base portion (221) of the limit member (22), and wherein the second locking member (120) is disposed on the slide member (110), and wherein in particular the operating member (130) is connected to the second locking member (120), and wherein the operating member (130) can control the slide member (110) to slide in the up and down direction relative to the slide groove (150).The crotch belt device (20) according to any one of the preceding claims, wherein the plurality of first locking members (160) are respectively disposed on a left side and a right side of the slide groove (150) in the up-down direction, or the adjusting mechanism (100) further comprises an elastic member (140), wherein the elastic member (140) abuts on the second locking member (120) to bias the second locking member (120) to be engaged with the corresponding first locking member (160).The crotch belt device (20) according to any one of the preceding claims, wherein the sliding member (110) is formed with: a first opening (114) disposed on the surface of the sliding member (110) away from the sliding groove (150); a second opening (115) disposed on the surface of the sliding member (110) facing the sliding groove (150); and wherein in particular the operating member (130) comprises: an operating end (131) exposed at the first opening (114); and a connecting end (132) passing through the sliding member (110) and exposed at the second opening (115).The step belt device (20) according to any one of the preceding claims, wherein two first openings (114) are provided on the surface of the slide member (110) away from the slide groove (150), wherein a second opening (115) is provided on the surface of the slide member (110) facing the slide groove (150), and wherein the first opening (114) and the second opening (115) are used for limiting the stroke of the operating member (130), or wherein the second surface (221b) of the base portion (221) is provided with an opening extending in the up and down direction, wherein the operating member (130) enters the slide groove (150) through the opening, and wherein the left side and the right side of the opening are arranged so as to close the stroke of the operating member, The sliding member (110) is prevented from being protruded oppositely relative to the left side and the right side of the sliding groove (150) to limit the sliding member (110) and prevent the sliding member (110) from coming off from the sliding groove (150) through the opening.The step belt device (20) according to any one of the preceding claims, wherein the adjusting mechanism (200) comprises: at least two limiting grooves disposed on one of the first surface (221a) and the second surface (221b) of the base portion (221) of the limiting member (22) at intervals in the up and down direction; at least two adjusting holes disposed corresponding to the at least two limiting grooves; a connecting groove (270) communicating with each of the adjusting holes; and wherein, in particular, a buckle member (220) disposed in particular in each of the limiting grooves is provided, wherein the first end of the step belt (23) is connected to the buckle member (220), and wherein the step belt (23) protrudes from the adjusting hole.The crotch belt device (20) according to claim 7, wherein the at least two limiting grooves comprise a first limiting groove (250) and a second limiting groove (260), wherein the first limiting groove (250) is disposed over the second limiting groove (260), and wherein the first limiting groove (250) has a lateral opening (251).The crotch belt device (20) according to claim 8, wherein the protective layer portion (222) of the limiting member (22) covers at least a part of the first limiting groove (250), or wherein the second limiting groove (260) is disposed at the lower end of the limiting member (22) and has a lower opening (261).The crotch belt device (20) according to any one of the preceding claims, wherein the adjusting mechanism (300) comprises: at least two adjusting rods (350, 360) disposed on the base portion (221) of the limiting member (22) at intervals in the up and down direction; a connecting buckle (320) connected to the first end (231) of the crotch belt (23) and switchably bendable to one of the at least two adjusting rods.The crotch belt device (20) according to claim 10, wherein the adjusting mechanism (300) further comprises: a support rod (370) disposed on the base portion (221) of the limiting member (22), wherein the first end (231) of the crotch belt (23) bypasses the support rod (370) and is connected to the adjusting rod via the connecting buckle (320).A crotch belt device (20) comprising: a limiting member (22); and a crotch belt (23) connected to the limiting member (22) and having a first end (231) and a second end (232), the second end being disposed opposite the first end (231), wherein the second end (232) is attachable or attached to a seat portion (16) of a child support means, and wherein the position at which the crotch belt (23) is connected to the limiting member (22) is adjustable to adjust the height of the limiting member (22) relative to the seat portion (16).The crotch belt device (20) according to claim 12, wherein the crotch belt device (20) further comprises an adjustment mechanism disposed on the limiting member (22), wherein the first end (231) of the crotch belt (23) is connected to the limiting member (22) by the adjustment mechanism, and wherein the position at which the first end (231) of the crotch belt (23) is connected to the limiting member (22) is adjustable by the adjustment mechanism.The crotch belt device (20) according to claim 12 or 13, wherein the limiting member (22) is connected between the first end (231) and the second end (232) of the crotch belt (23), and wherein the position at which the crotch belt (23) is connected to the limiting member (22) is adjustable by the first end (231).The crotch belt device (20) according to any one of claims 12 to 14, wherein the crotch belt (23) is a half-folded crotch belt (23), and wherein two free ends of the half-folded crotch belt (23) are the two second ends (232) of the crotch belt (23), and the half-folded part is the first end (231) of the crotch belt (23), or wherein the first end of the crotch belt is provided with an insert to thicken the first end.The crotch belt device (20) according to any one of claims 12 to 15, wherein the crotch belt (23) comprises a first belt (23a) and a second belt (23b) arranged one above the other, wherein a first end (23a1) of the first belt (23a) and a first end (23b1) of the second belt (23b) are both the second ends (232) of the crotch belt (23), and wherein the second end (23a2) of the first belt (23a) and the second end (23b2) of the second belt (23b) are arranged one above the other to form the first end (231) of the crotch belt (23), or wherein the crotch belt (23) comprises a first belt (23a) and a second belt (23b) arranged one above the other, wherein the first end (23a1) of the first strap (23a) and the first end (23b1) of the second strap (23b) are both the second ends (232) of the crotch strap (23), and wherein the second end (23a2) of the first strap (23a) is folded back to form a first fold-back portion (23c1), wherein the second end (23b2) of the second strap (23b) is folded back to form a second fold-back portion (23c2), and wherein the first fold-back portion (23c1) and the second fold-back portion (23c2) are formed overlapping and connected to form the first end (231) of the crotch strap (23).The crotch belt device (20) according to any one of claims 12 to 16, wherein the crotch belt device (20) is further provided with a stopper portion (237) connected to the crotch belt (23) to limit the limit position at which the crotch belt (23) is connected to the limiting member (22), and wherein the stopper portion (237) is disposed between the first end (231) of the crotch belt (23) and the limiting member (22); and / or the stopper portion (237) is disposed between the second end (232) of the crotch belt (23) and the limiting member (22).The crotch belt device (20) according to any one of claims 12 to 17, wherein the crotch belt (23) is connected to the limiting member (22) by a connecting member (24), wherein the connecting member (24) is provided with a through hole (241), and wherein the second end (232) of the crotch belt (23) is fixed to the seat portion (16) of the child support means after passing through the through hole (241).The crotch belt device (20) of claim 18, wherein the connecting member (24) is provided with anti-slip teeth (242).A child safety seat (10) comprising: a backrest portion (14) and a seat portion (16), wherein the crotch belt device (20) according to any one of claims 1 to 19 is connected to the child safety seat (10), and wherein a second end (232) of a crotch belt (23) of the crotch belt device (20) is fixed to the seat portion (16).