Child safety seat

Abstract

To provide a child safety seat provided with a height-adjustable headrest.SOLUTION: A child safety seat (100) includes: a base (1) provided with a pivotable support leg (11); a seat (2) having a backrest (22) provided with a height-adjustable headrest (23); a headrest limiting device operably connected to the support leg (11) and including a first locking member or a second locking member. When the support leg (11) is in an unfolded state, the second locking member is in a retracted state, and the first locking member is in an extended state and capable of being engaged with the headrest (23), thereby limiting an upper adjustment height of the headrest. When the support leg (11) is in a folded state, the first locking member is in a retracted state, and the second locking member is in an extended state and capable of being engaged with the headrest (23), thereby limiting a lower adjustment height of the headrest (23).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present application relates to child safety seats. [Background technology]

[0002] Child safety seats are used in vehicles to make it easier for parents to travel with their children. Conventional child safety seats generally include a headrest to support and protect the child's head, and the height of the headrest is adjustable to accommodate children of various heights. The height adjustment range of the headrest is generally relatively large, meeting the needs of children of various heights. If parents are unfamiliar with the specifications of the child safety seat, they may easily adjust the headrest to an inappropriate height, resulting in the headrest failing to effectively protect the child's head. For example, for infant passengers, a headrest adjusted above a certain height is inappropriate, while for older child passengers, a headrest adjusted below a certain height is inappropriate. Summary of the Invention

[0003] The present application provides a child safety seat including a seat having a base with swingable support legs, a backrest with a height-adjustable headrest, and a headrest limiting device operably connected to the support legs and including a first locking member or a second locking member. When the support legs are in an unfolded state, the first locking member is in an extended state and is engageable with the headrest, thereby limiting the upper adjustment height of the headrest. When the support legs are in a folded state, the first locking member is in a stored state. When the support legs are in an unfolded state, the second locking member is in a stored state. When the support legs are in a folded state, the second locking member is in an extended state and is engageable with the headrest, thereby limiting the lower adjustment height of the headrest.

[0004] Furthermore, the headrest is disposed inside the backrest, and a blocking block connected to the headrest is provided outside the backrest, and the blocking block is configured to move up and down following the headrest. The blocking block includes an upper limiting surface configured to be engaged with the first locking member, or the blocking block includes a lower limiting surface configured to be engaged with the second locking member.

[0005] Additionally, the outside of the backrest is provided with a track that slidably engages with the blocking block.

[0006] The headrest limiting device further includes a first locking assembly or a second locking assembly, the first locking assembly including a first elastic restoring member attached to the backrest and connected to the first locking member, and a first towing rope having a first end connected to a first connection point of the support leg and a second end connected to the first elastic restoring member, wherein when the support leg is in the unfolded state, the first elastic restoring member maintains the first locking member in an extended state, and when the support leg is in the folded state, the first elastic restoring member receives a force from the first towing rope and is deformed, causing the first locking member to switch from the extended state to the stored state. The second locking assembly includes a second elastic restoring member attached to the backrest and connected to the second locking member, and a second towing rope having a first end connected to the second connection point of the support leg and a second end operably connected to the second elastic restoring member, wherein when the support leg is in the folded state, the second elastic restoring member maintains the second locking member in an extended state, and when the support leg is in the unfolded state, the second elastic restoring member receives force from the second towing rope and deforms, causing the second locking member to switch from the extended state to the stored state.

[0007] Furthermore, the first elastic restoring member is integrally formed with the first locking member, or the second elastic restoring member is integrally formed with the second locking member.

[0008] Furthermore, the support leg is swingably connected to the base by a swing point, the first connection point being located at the top of the support leg, and the first connection point and the swing point being spaced apart by a first predetermined distance in the length direction of the support leg, or the second connection point being located at the top of the support leg, and the second connection point and the swing point being spaced apart by a second predetermined distance in the length direction of the support leg.

[0009] Further, a first guide portion is provided at the front end of the base, the first towing rope is engaged with the front end of the base via the first guide portion, and the length of the first towing rope between the first guide portion and the first connection point when the support leg is in the unfolded state is shorter than the length of the first towing rope between the first guide portion and the first connection point when the support leg is in the folded state. Alternatively, a second guide portion is provided at the front end of the base, the second towing rope is engaged with the front end of the base via the second guide portion, and the length of the second towing rope between the second guide portion and the second connection point when the support leg is in the folded state is shorter than the length of the second towing rope between the second guide portion and the second connection point when the support leg is in the unfolded state.

[0010] Furthermore, the seat is pivotally connected to the base via a hollow rotating shaft, and the first towing rope passes through the rotating shaft;

[0011] Furthermore, the seat is fixedly connected to the base, and a first guide structure or a second guide structure is provided at the bottom of the base, and the first towing rope passes through the first guide structure, and the second towing rope passes through the second guide structure.

[0012] The first locking assembly further includes a first mounting seat attached to the backrest and having a first receiving groove, the first elastic restoring member being disposed in the first receiving groove, and a first through-hole being provided in the groove bottom of the first receiving groove for extending or retracting the first locking member, or the second locking assembly further includes a second mounting seat attached to the backrest and having a second receiving groove, the second elastic restoring member being disposed in the second receiving groove, and a second through-hole being provided in the groove bottom of the second receiving groove for extending or retracting the second locking member.

[0013] Furthermore, a first driving pin is connected to the second end of the first towing rope, and the first driving pin is received in the first receiving groove and abuts against the first elastic restoring member, or a second driving pin is connected to the second end of the second towing rope, and the second driving pin is received in the second receiving groove and abuts against the second elastic restoring member.

[0014] Furthermore, a first slideway is provided on the groove wall of the first receiving groove, and the first drive pin is slidably fitted into the first slideway, or a second slideway is provided on the groove wall of the second receiving groove, and the second drive pin is slidably fitted into the second slideway.

[0015] Furthermore, the first elastic restoring member has a first opening, the second end of the first towing rope has a first connecting ring disposed within the first opening and attached to the first driving pin, or the second elastic restoring member has a second opening, the second end of the second towing rope has a second connecting ring disposed within the second opening and attached to the second driving pin.

[0016] Furthermore, the first end of the first elastic restoring member is connected to the first mounting seat, the second end of the first elastic restoring member extends at an angle toward the bottom of the first receiving groove, and the first locking member is disposed at the second end of the first elastic restoring member. Alternatively, the first end of the second elastic restoring member is connected to the second mounting seat, the second end of the second elastic restoring member extends at an angle toward the bottom of the second receiving groove, and the second locking member is disposed at the second end of the second elastic restoring member.

[0017] Furthermore, a height adjustment mechanism is disposed between the backrest and the headrest, and the height adjustment mechanism enables the headrest to have an upper limit adjustment height and a lower limit adjustment height on the backrest, the height value of the upper limit adjustment height being greater than that of the upper adjustment height, or the height value of the lower limit adjustment height being less than that of the lower adjustment height.

[0018] Furthermore, the head inferiority beltA hole and a seat belt restraint are provided, with a lower limit adjustment height and an upper adjustment height corresponding to the distance between the shoulder belt hole and the upper surface of the seat bottom, or the upper limit adjustment height and the lower adjustment height corresponding to the distance between the seat belt restraint and the upper surface of the seat bottom. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a schematic perspective view of a child safety seat according to an embodiment of the present application, conceptually illustrating the seat mounted forward on a base and the support legs in an unfolded state; [Figure 2] 1 is a schematic perspective view of a child safety seat according to an embodiment of the present application, showing the seat mounted rearward on the base and the support legs in an unfolded state; [Figure 3] 1 is a schematic perspective view of a seat, a support leg, and a headrest limiting device of a child safety seat according to an embodiment of the present application, the seat being in a forward mounting position and the support leg being in an extended state; [Figure 4] 1 is a schematic perspective view of a support leg of a child safety seat according to an embodiment of the present application; [Figure 5] 1 is a schematic perspective view of a seat, support legs, and a headrest limiting device of a child safety seat according to an embodiment of the present application, the view showing the seat mounted forward on the base and the support legs in a folded state; FIG. [Figure 6] 1 is a schematic rear perspective view of a child safety seat according to an embodiment of the present application; [Figure 7] 1 is a schematic partial vertical cross-sectional view of a first lock assembly of a child safety seat according to an embodiment of the present application. [Figure 8] 8 is a schematic enlarged view of position A in FIG. 7. [Figure 9] 1 is a first schematic perspective view of a first lock assembly of a child safety seat according to an embodiment of the present application; [Figure 10] FIG. 2 is a second schematic perspective view of a first lock assembly of the child safety seat according to the embodiment of the present application. [Figure 11] 1 is a schematic exploded view of a first lock assembly of a child safety seat according to an embodiment of the present application; [Figure 12] 1 is a schematic partial vertical cross-sectional view of a second lock assembly of a child safety seat according to an embodiment of the present application. [Figure 13] 13 is a schematic enlarged view of position B in FIG. 12. [Figure 14] 1 is a schematic perspective view of a second lock assembly of a child safety seat according to an embodiment of the present application; [Figure 15] 1 is a schematic exploded view of a second lock assembly of a child safety seat according to an embodiment of the present application; [Figure 16] 1 is a schematic diagram showing the paths of the first and second towing ropes when the support legs of the child safety seat according to the embodiment of the present application are in the unfolded state and the seat is in the forward mounted state; [Figure 17] 3 is a schematic diagram showing an adjustment position of a headrest in a child safety seat according to an embodiment of the present application; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] 1, 2, and 6 show the structure of a child safety seat 100 according to an embodiment of the present application. The child safety seat 100 includes a base 1 and a seat 2. In this embodiment, the seat 2 is rotatably disposed on the base 1. In this case, the seat 2 can take a forward mounting position and a rearward mounting position with respect to the base 1. FIG. 1 shows a perspective view of the seat 2 mounted forward on the base 1, and it can be seen that a child seated in the forward mounted seat 2 faces forward. FIG. 2 shows a perspective view of the seat 2 mounted backward on the base 1, and it can be seen that a child seated in the rear mounted seat 2 faces backward. In another embodiment, the seat 2 may be fixed to the base 1, and therefore the seat 2 cannot rotate with respect to the base 1.

[0021] In the present embodiment, terms relating to directions such as "front," "rear," "left," "right," "upper," and "lower" correspond to the directions of "front," "back," "left," "right," "up," and "down" of a vehicle unless otherwise specified. These terms relating to directions are used to clarify the description of the embodiments of the present application and are not intended to unduly limit the scope of protection of the present application.

[0022] 3 and 4, a swingable support leg 11 is provided at the front end of the base 1, and the support leg 11 is swingably connected to the base 1 by a swing point 11a. The support leg 11 can be in an unfolded state (FIG. 1) or a folded state (FIG. 5) relative to the base 1. The seat 2 has a seat portion 21 and a backrest 22 provided with a height-adjustable headrest 23, and the headrest 23 can be adjusted according to the height of a child. For example, a height adjustment mechanism 4 is disposed between the backrest 22 and the headrest 23. The height adjustment mechanism 4 may be a known mechanism. The height adjustment mechanism 4 makes it possible to adjust the height of the headrest 23 on the backrest 22 (see FIG. 17; the distance of the headrest 23 from the upper surface of the seat 21) so that the headrest 23 can be adapted to children of various heights. The height adjustment mechanism 4 enables the headrest 23 to have an upper limit adjustment height H3 and a lower limit adjustment height H4, and can be fixed at any of a plurality of adjustment positions between the upper limit adjustment height H3 and the lower limit adjustment height H4. That is, the height adjustment range of the headrest 23 provided by the height adjustment mechanism 4 is within the range from H3 to H4.

[0023] 1, 5 and 17, in a child safety seat 100 suitable for the height of a young child (e.g., 0 to 4 years old) or an older child (e.g., 3 to 12 years old), a seat belt restraint 237 and shoulder belt holes 236 are provided in the headrest 23, and the seat belt restraint 237 is disposed above the shoulder belt holes 236. When a young child is seated in the child safety seat 100 (e.g., in this case, the support legs 11 need to be in the unfolded state), the seat belt of the child safety seat 100 passes through the shoulder belt holes 236, and the child safety seat 100 secures the young child to the child safety seat 100 with its own seat belt. When an older child is seated in the child safety seat 100, the seat belt of the vehicle seat passes through the seat belt restraint 237 when engaged with the child safety seat 100. The shoulder belt holes 236 or seat belt restraint 237 ensure that the seat belt of the vehicle seat protects the child seated in the child safety seat 100 without affecting the riding comfort of the child.

[0024] In the art, when the headrest 23 is used for a younger child, the height of the headrest 23 generally refers to the distance between the lower edge of the shoulder belt hole 23 and the upper surface of the seat 21. The lower limit adjustment height H4, for example, refers to the minimum distance from the lower edge of the shoulder belt 236 to the upper surface of the seat 21. When the headrest 23 is used for an older child, the height of the headrest 23 generally refers to the distance between the lower edge of the seat belt restraint 237 and the upper surface of the seat 21. The upper limit adjustment height H3, for example, refers to the maximum distance from the lower edge of the seat belt restraint 237 to the upper surface of the seat 21.

[0025] The child safety seat 100 further includes a headrest limiting device 3 operatively connected to the support leg 11. The headrest limiting device 3 has different operating states according to the change of the operating mode (deployed or folded) of the support leg 11.

[0026] 7, 8, and 17, in this embodiment, the headrest limiting device 3 has a first locking member 301. When the support leg 11 is in the unfolded state, the first locking member 301 is in an extended state and engaged with the headrest 23, thereby limiting the upper adjustment height H1 of the headrest 23 (in the above-mentioned context, the upper adjustment height H1 refers to, for example, the distance from the lower edge of the shoulder belt hole 236 to the upper surface of the seat 21). When the support leg 11 is in the folded state, the first locking member 301 is in a stored state. When the support leg 11 is in the unfolded state, the second locking member 302 is in an extended state and engaged with the headrest 23, thereby limiting the lower adjustment height H2 of the headrest 23 (in the above-mentioned context, the lower adjustment height H2 refers to, for example, the distance from the seat belt restraint 237 to the upper surface of the seat 21). The height value of the upper limit adjustment height H3 is greater than the height value of the upper adjustment height H1, which is greater than the height value of the lower limit adjustment height H4, which is less than the lower adjustment height H2, and which is less than the height value of the upper limit adjustment height H3.

[0027] In general, the child safety seat 100 is more suitable for younger children (e.g., infants) when supported by the support legs 11 (i.e., when the support legs 11 are in an unfolded state when the child safety seat 100 is in use). In this case, the headrest 23 needs to be adjusted to a lower position range. The child safety seat 100 is more suitable for older children when not supported by the support legs 11 (i.e., when the support legs 11 are in a folded state when the child safety seat 100 is in use). In this case, the headrest needs to be adjusted to a higher position range.

[0028] To prevent the headrest 23 from being used improperly when the support legs 11 of the child safety seat 100 are in different modes, the headrest limiting device 3 is configured to be operably connected to the support legs 11 in the embodiment of the present application. When the support legs 11 are in an unfolded state for a child to ride in, the first locking member 301 of the headrest limiting device 3 is in an extended state, and the second locking member 302 of the head restraint limiting device 3 is in a retracted state, thereby limiting the upper adjustment height H1 of the headrest 23 when the support legs 11 are in the unfolded state. In this case, the height adjustment range of the headrest 23 is, for example, within a range from H4 to H1 (e.g., within a range from 274 mm to 391 mm). As a result, when a child is seated in the child safety seat, improper use of the headrest caused by a parent adjusting the headrest 23 to a too high position can be prevented, improving the safety and comfort of the child. When the support legs 11 are in the folded state for an older child to ride in, the second locking member 302 of the headrest limiting device 3 is in the deployed state and the first locking member 301 of the headrest device 3 is in the stored state, thereby limiting the lower adjustment height H2 of the headrest 23 when the support legs 11 are in the folded state. In this case, the height adjustment range of the headrest 23 is, for example, within a range from H2 to H3 (e.g., within a range from 324 mm to 533 mm). As a result, when an older child is seated in the child safety seat, improper use of the headrest caused by a parent adjusting the headrest 23 to a too low position can be avoided, thereby improving the safety and comfort of the child.

[0029] In some embodiments, the height difference HS between the upper adjustment height H1 and the lower adjustment height H2 is not equal to the height difference between the lower edge of the seat belt restraint 237 and the lower edge of the shoulder belt hole 236; more specifically, the height value of the upper adjustment height H1 is greater than the height value of the lower adjustment height H2. That is, the position adjustment range of the headrest 23 when the support legs 11 are in the unfolded state and the position adjustment range of the headrest 23 when the support legs 11 are in the folded state may partially overlap. In other embodiments (e.g., as shown in FIG. 17 ), the height difference HS between the upper adjustment height H1 and the lower adjustment height H2 is equal to the height difference between the lower edge of the seat belt restraint 237 and the lower edge of the shoulder belt hole 236, for example.

[0030] 1 and 6 , the headrest 23 is disposed on the inner side 221 of the backrest 22, and a blocking block 24 connected to the headrest 23 is provided on the outer side 222 of the backrest 22. The blocking block 24 is configured to move up and down following the headrest 23. The blocking block 24 is detachably connected to the headrest 23, for example, by a bolt (not numbered in the figures), and the outer side 222 of the backrest 22 is provided with, for example, a track 2221 that slidably engages with the blocking block 24. The blocking block 24 includes an upper limiting surface 241 configured to be engaged with the first locking member 301. The blocking block 24 may further include a lower limiting surface 242 configured to be engaged with the second locking member 302. As a result, the first locking member 301 and the second locking member 302 are indirectly engaged with the headrest 23 by the blocking block 24, thereby limiting the upper adjustment height H1 and the lower adjustment height H2 of the headrest 23. The blocking block 24, which is configured to move following the headrest 23, is arranged on the outer side 222 of the backrest 22, and the extending directions of the first locking member 301 and the second locking member 302 are both configured to face in a direction away from the back of the child passenger. On the one hand, the outer space of the backrest 22 is utilized to the maximum, and on the other hand, the structure of the headrest 23 itself is not significantly affected.

[0031] 3, the headrest limiting device 3 may further include a first lock assembly 31 and a second lock assembly 32. FIGS. 7 to 11 show a preferred embodiment of the first lock assembly 31, and FIGS. 12 to 15 show a preferred embodiment of the second lock assembly 32.

[0032] 3, 4, 7 to 11, and 16, the first locking assembly 31 may include a first elastic restoring member 311 and a first towing rope 312. The first elastic restoring member 311 is mounted on the backrest 22 and connected to the first locking member 301. The first elastic restoring member 311 may be, for example, an elastic sheet and may be made of metal, plastic, or other suitable material. The first towing rope 312 may be, for example, a steel wire, and a first end 3121 of the first towing rope 312 is connected to the first connection point 111 of the support leg, and a second end 3122 of the first towing rope 312 is operably connected to the first elastic restoring member 311. In addition, the operable connection between the first towing rope 312 and the first elastic restoring member 311 may be a direct connection, an indirect connection, direct contact, indirect contact, etc., such that active movement of one of the first towing rope 312 and the first elastic restoring member 311 causes passive movement of the other.

[0033] By appropriately setting the path of the first traction rope 312, the first locking assembly 31 satisfies the following condition: When the support leg 11 is in the unfolded state (which, as described above, generally corresponds to a state in which a child is riding, and it is necessary to prevent the position of the headrest 23 from becoming too high), the first elastic restoring member 311 maintains the first locking member 301 in the extended state. When the headrest 23 moves from the bottom to the upper part and reaches the upper adjustment height H1, the first locking member 301 abuts against the upper limiting surface 241, thereby restricting the headrest 23 from moving higher than the upper adjustment height H1. When the support leg 11 switches from the unfolded state to the folded state, the support leg 11 pulls the first traction rope 11, and the first elastic restoring member 311 elastically deforms under the force of the first traction rope 311. The elastic deformation of the first elastic restoring member 311 drives the first locking member 301 to switch from the extended state to the stowed state. In this case, the first locking member 301 can no longer restrict the headrest 23 from moving higher than the upper adjustment height H1. It can be understood that when the support leg 11 switches from the folded state to the unfolded state, the first elastic restoring member 311 pulls the first traction rope 312 in the opposite direction due to the action of its elastic restoring force, and the first locking member 301 returns to the extended state.

[0034] 3, 4, and 12 to 16, the second lock assembly 32 includes a second elastic restoring member 321 and a second pulling rope 322. The second elastic restoring member 321 is mounted on the backrest 22 and connected to the second locking member 302. The second elastic restoring member 321 may be, for example, an elastic sheet and may be made of metal, plastic, or other suitable material. The second locking member 302 may be a locking pin and is attached to or integrally formed with the second elastic restoring member 321. The second pulling rope 322 may be, for example, a steel wire. A first end 3221 of the second pulling rope 322 is connected to the second connection point 112 of the support leg 11, and a second end 3222 of the second pulling rope 312 is operably connected to the second elastic restoring member 321. In addition, the operable connection between the second towing rope 322 and the second elastic restoring member 321 may be a direct connection, an indirect connection, direct contact, indirect contact, etc., such that active movement of one of the second towing rope 322 and the second elastic restoring member 321 results in passive movement of the other.

[0035] By appropriately setting the path of the second pulling rope 322, the second locking assembly 32 satisfies the following condition: when the support leg 11 is in the folded state (which, as described above, generally corresponds to a state in which an older child rides, and the position of the headrest 23 needs to be controlled so as not to become too low), the second elastic restoring member 321 maintains the second locking member 302 in the extended state. When the headrest 23 moves from the top to the bottom and reaches the lower adjustment height H2, the second locking member 302 abuts against the lower limiting surface 242, thereby restricting the headrest 23 from moving below the lower adjustment height H2. When the support leg 11 switches from the folded state to the unfolded state, the support leg 11 pulls the second pulling rope 322, and the second elastic restoring member 321 elastically deforms under the force from the second pulling rope 322. The elastic deformation of the second elastic restoring member 321 drives the second locking member 302 to switch from the extended state to the stowed state. In this case, the second locking member 302 can no longer restrict the headrest 23 from moving below the lower adjustment height H2. It can be understood that when the support leg 11 switches from the unfolded state to the folded state, the second elastic restoring member 321 pulls the second traction rope 322 in the opposite direction due to the action of its elastic restoring force, and the second locking member 302 returns to the extended state.

[0036] 3 to 5, in this embodiment, the first connection point 111 is disposed on the upper portion 110 of the support leg 11, and the first connection point 111 of the support leg 11 and the swing point 11a are spaced apart by a first predetermined distance L1 in the length direction L of the support leg 11. The second connection point 112 is disposed on the upper portion 110 of the support leg 11, and the second connection point 112 of the support leg 11 and the swing point 11a are spaced apart by a second predetermined distance L2 in the length direction L of the support leg 11. In some embodiments, the first predetermined distance L1 is equal to the second predetermined distance L2. In some embodiments, the first connection point 111 and the second connection point 112 may be the same connection point.

[0037] 3, 5, and 16, in this embodiment, the first towing rope 312 and the second towing rope 312 may be configured, for example, as follows.

[0038] The first guide part 101 is disposed at the front end of the bottom of the base 1 (for ease of understanding, the base 1 is not shown in FIGS. 3 and 5 ), and the first towing rope 312 is engaged with the front end of the base 1 via the first guide part 101. The first guide part 101 is disposed, for example, behind the first connection point 111. When the support leg 11 is in the unfolded state, the length of the first towing rope between the first guide part 101 and the first connection point 111 is relatively short, and when the support leg 11 is in the folded state, the length of the first towing rope between the first guide part 101 and the first connection point 111 is relatively long. In FIG. 3 , S1 indicates the length of the first towing rope 312 between the first guide part 101 and the first connection point 111 when the support leg 11 is in the unfolded state. In FIG. 5 , S2 indicates the length of the first towing rope 312 between the first guide part 101 and the first connection point 111 when the support leg 11 is in the folded state. S1 is smaller than S2. The second end 3122 of the first traction rope 312 extends upward through the first guide part 101 and the bottom part of the base 1, and is connected to the first elastic restoring member 311.

[0039] The second guide portion 102 is disposed at the front end of the bottom of the base 1, and the second towing rope 322 is engaged with the front end of the base 1 via the second guide portion 102. The second guide portion 102 is disposed, for example, in front of the second connection point 112. When the support leg 11 is in the unfolded state, the length of the second towing rope between the second guide portion 102 and the second connection point 112 is relatively large, and when the support leg 11 is in the folded state, the length of the second towing rope between the second guide portion 102 and the second connection point 112 is relatively small. In FIG. 3, S3 indicates the length of the second towing rope 322 between the second guide portion 102 and the second connection point 112 when the support leg 11 is in the folded state. In FIG. 5, S4 indicates the length of the second towing rope 322 between the second guide portion 102 and the second connection point 112 when the support leg 11 is in the unfolded state. S3 is larger than S4. The second end 3222 of the second pulling rope 322 extends upward through the second guide part 102 and the bottom part of the base 1 and is connected to the second elastic restoring member 321.

[0040] Referring to FIG. 6, in this embodiment, the seat 2 is pivotally connected to the base 1 via the hollow rotating shaft 20; for example, the seat 2 can rotate 360°. In this case, the second end 3122 of the first pulling rope 312 can be operably connected to the first elastic restoring member 311 after passing through the central hole of the rotating shaft 20, and the second pulling rope 322 can be operably connected to the second elastic restoring member 321 after passing through the central hole of the rotating shaft 20. As a result, the first lock assembly 31 and the second lock assembly 32 always operate regardless of whether the seat 2 is in the forward mounting position or the rearward mounting position. Referring to FIG. 16, it can be seen that in this embodiment, the first pulling rope 312 and the second pulling rope 322 cross each other within the rotating shaft 20. However, in other embodiments, the first pulling rope 312 and the second pulling rope 322 may use other suitable paths, and in such paths, the first pulling rope 312 and the second pulling rope 322 may not cross each other.

[0041] 8 to 11, in this embodiment, the first lock assembly 31 may further include a first mounting seat 331 attached to the backrest 22 and having a first receiving groove 3310, with a first elastic restoring member 311 disposed within the first receiving groove 3310. The first elastic restoring member 311 is attached to the backrest 311 via the first mounting seat 331, and the first elastic restoring member 311 within the first receiving groove 3310 does not easily interfere with other components. A first through-hole 33101 is provided at the bottom of the first receiving groove 3310 to allow the first locking member 301 to be extended or retracted. When the first locking member 301 extends from the first through-hole 33101, the first locking member 301 enters an extended state and engages with the headrest 23 or the blocking block 24. When the first locking member 301 is retracted from the first through-hole 33101, the first locking member 301 is in a retracted state.

[0042] 13 to 15, in this embodiment, the second lock assembly 32 may further include a second mounting seat 332 attached to the backrest 22 and having a second receiving groove 3320, and a second elastic restoring member 321 is disposed in the second receiving groove 3320. The second elastic restoring member 321 is attached to the backrest 22 via the second mounting seat 332, and the second elastic restoring member 321 in the second receiving groove 3320 does not easily interfere with other components. A second through-hole 33201 is provided at the bottom of the second receiving groove 3320 so that the second locking member 302 can be extended or retracted. It can be seen that when the second locking member 302 extends from the second through-hole 33201, the second locking member 302 is in an extended state and engages with the headrest 23 or the blocking block 24. The second locking member 302 is 2 When retracted from the through hole 33201, the second locking member 302 is in the retracted state.

[0043] This embodiment shows an operable connection between a first towing rope 312 and a first elastic return member 311 and an operable connection between a second towing rope 322 and a second elastic return member 321 .

[0044] 10 and 11 , the second end 3122 of the first pulling rope 312 is connected to the first driving pin 341, and the first pulling rope 312 interacts with the first driving pin 341 via the first elastic restoring member 311. In some embodiments, the first driving pin 341 is received in the first receiving groove 3310 and abuts against the first elastic restoring member 311. When the support leg 11 switches from the unfolded state to the folded state, the first pulling rope 312 drives the first elastic restoring member 311 to be deformed by the first driving pin 341, and the first locking member 301 is retracted from the first through-hole 33101.

[0045] In some embodiments, a first slide path 33102 is provided on the groove wall of the first receiving groove 3310, and the first drive pin 341 is slidably fitted into the first slide path 33102. The first slide path 33102 is, for example, an elongated hole, and the stroke of the first drive pin 341 provided by the first slide path 33102 is, for example, equal to the difference between S1 and S2 described above. Referring to FIG. 8 , when the support leg 11 switches from the unfolded state to the folded state, the first traction rope 312 pulls the first drive pin 341 to move rightward and downward along the first slide path 33102, and the first drive pin 341 applies force to the first elastic restoring member 311 during the movement, and the first locking member 301 moves rightward and upward and is retracted from the first through hole 33101. As a result, when the support legs 11 of the child safety seat are folded down for an older child to ride in, the first locking member 301 can no longer restrict the headrest 23 from moving upwards.

[0046] In some embodiments, a first opening 3110 is provided at the middle portion of the first elastic restoring member 311, and a first connecting ring 31220 is provided at the second end 3122 of the first pulling rope 312. The first connecting ring 31220 is disposed within the first opening 3110 and attached to the first driving pin 341.

[0047] In some embodiments, the first end 3111 of the first elastic restoring member 311 is, for example, riveted or welded to the first mounting seat 331, and the second end 3112 of the first elastic restoring member 311 extends at an angle toward the bottom of the first receiving groove 3310, thereby forming an inclined surface. The first locking member 301 is disposed at the second end 3112 of the first elastic restoring member 311. When the traction force from the first pulling rope 312 received by the first driving pin 341 is greater than the pressing force from the first elastic restoring member 311 received by the first driving pin 341, the first driving pin 341 slides in the first sliding path 33102 and simultaneously presses against the inclined surface of the first elastic restoring member 311, causing the inclined surface of the first elastic restoring member 311 to elastically deform, and the first locking member 301 is forcibly retracted from the first through-hole 33101. When the traction force from the first traction rope 311 received by the first drive pin 341 is smaller than the pressing force from the first elastic restoring member 311 received by the first drive pin 341, the inclined surface of the first elastic restoring member 311 drives the first drive pin 341 to slide in the opposite direction along the first sliding path 33102, and at the same time the first locking member 301 extends from the first through hole 33101.

[0048] 15 , the second end 3222 of the second pulling rope 322 is connected to the second driving pin 342, and the second pulling rope 322 interacts with the second driving pin 342 via the second elastic restoring member 321. In some embodiments, the second driving pin 342 is received in the second receiving groove 3320 and abuts against the second elastic restoring member 321. When the support leg 11 switches from the folded state to the unfolded state, the second pulling rope 322 drives the second elastic restoring member 321 to be deformed by the second driving pin 342, and the second locking member 302 is retracted from the second through-hole 33201.

[0049] In some embodiments, a second slideway 33202 is provided on the groove wall of the second receiving groove 3320, and the second drive pin 342 is slidably fitted into the second slideway 33202. The second slideway 33202 is, for example, an elongated hole, and the stroke of the second drive pin 342 provided by the second slideway 33202 is, for example, equal to the difference between S3 and S4 described above. Referring to FIG. 13 , when the support leg 11 switches from the folded state to the unfolded state, the second traction rope 322 pulls the second drive pin 342 to move rightward and downward along the second slideway 33202, and the second drive pin 342 applies force to the second elastic restoring member 321 during the movement, and the second locking member 302 moves rightward and upward and is retracted from the second through-hole 33201. When the support legs 11 of the child safety seat are in the unfolded state for a small child to ride in, the second locking member 302 can no longer restrict the downward movement of the headrest 23.

[0050] In some embodiments, a second opening 3210 is provided in the middle portion of the second elastic restoring member 321, and a second connecting ring 32220 is provided at the second end 3222 of the second pulling rope 322. The second connecting ring 32220 is disposed in the second opening 3210 and attached to the second driving pin 342.

[0051] In some embodiments, the first end 3211 of the second elastic restoring member 321 is riveted or welded to the second mounting seat 332, for example, and the second end 3212 of the second elastic restoring member 321 extends at an angle toward the bottom of the second receiving groove 3320, thereby forming an inclined surface. The second locking portion 302 is disposed at the second end 3212 of the second elastic restoring member 321. When the pulling force from the second pulling rope 322 received by the second driving pin 342 is greater than the pressing force from the second elastic restoring member 321 received by the second driving pin 342, the second driving pin 342 slides with the second sliding member 33202 and simultaneously presses against the inclined surface of the second elastic restoring member 321, elastically deforming the inclined surface of the second elastic restoring member 321, and the second locking member 302 is forcibly retracted from the second through-hole 33201. When the traction force from the second traction rope 322 received by the second drive pin 342 is smaller than the pressing force from the second elastic restoring member 321 received by the second drive pin 342, the inclined surface of the second elastic restoring member 321 drives the second drive pin 342 to slide in the opposite direction along the second sliding path 33202, and at the same time, the second dock member 302 extends from the second through hole 33201.

[0052] The first mounting seat 331 and the second mounting seat 332 are disposed in the middle of the backrest 22 and are arranged apart on the left and right.

[0053] In this embodiment, the headrest limiting device 3 includes both the first locking member 301 and the second locking member 302. However, in actual applications, the headrest limiting device 3 may include only one of the first locking member 301 and the second locking member 302. Accordingly, only one of the first locking assembly 31 and the second locking assembly 32 corresponding to the first locking member 301 and the second locking member 302, respectively, may be provided.

[0054] The headrest limiting device 3, the first lock assembly 31, and the second lock assembly 32 may have various implementations in other embodiments, and are not limited to the above examples as long as the objectives of this application can be achieved.

[0055] In the above-described embodiment, the first locking member 301 and the second locking member 302 abut against and engage with the blocking block 24 to restrict the up-down movement of the headrest 23. In other embodiments, the blocking block 24 may not be provided, and the first locking member 301 and the second locking member 302 may, for example, directly abut against or be directly engaged with the headrest 23 to restrict the up-down movement of the headrest 23.

[0056] In the above-described embodiment, a child safety seat 100 in which the seat 2 is rotatably connected to the base 1 is used as an example for explanation. In another embodiment not shown, the headrest limiting device 3 according to the embodiment of the present application can also be applied to a child safety seat 100 in which the seat cushion 2 is fixedly connected to the base 1. In this case, the first guide structure or the second guide structure (not shown) may be disposed at the bottom of the base 1. The second end 3122 of the first traction rope 312 passes through the first guide structure, is guided upward by the first guide structure, and is operably connected to the first elastic restoring member 311. The second end 3222 of the second traction rope 322 passes through the second guide structure, is guided upward by the second guide structure, and is operably connected to the second elastic restoring member 321.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of simplicity, not all possible combinations of the technical features in the above embodiments are described. However, all combinations of these technical features should be considered within the scope of the present application, as long as they are not mutually contradictory.

[0058] The above-described embodiments are merely illustrative of some embodiments of the present application, and although the descriptions are specific and detailed, they are not to be construed as limiting the scope of the present invention.

[0059] It should be noted that a person skilled in the art can make several variations and modifications without departing from the scope of the present application, all of which fall within the scope of protection of the present application.

[0060] Therefore, the scope of protection of this application shall be subject to the appended claims.

Claims

1. a base provided with swingable support legs; a seat having a backrest with a height-adjustable headrest; a headrest limiting device operably connected to the support leg; Equipped with The headrest restricting device includes a first locking member and a second locking member, When the support legs are in an unfolded state, the first locking member is in an extended state and is engageable with the headrest, thereby limiting the upper adjustment height of the headrest; when the support legs are in a folded state, the first locking member is in a stored state; When the support legs are in an unfolded state, the second locking member is in a stored state, and when the support legs are in a folded state, the second locking member is in an extended state and is engageable with the headrest, thereby limiting the lower adjustment height of the headrest. Child safety seat.

2. The headrest is disposed inside the backrest, and a blocking block connected to the headrest is provided on the outside of the backrest, and the blocking block is configured to move in the up and down direction following the headrest, the blocking block comprises an upper limiting surface configured to be engaged with the first locking member or a lower limiting surface configured to be engaged with the second locking member; 2. A child safety seat according to claim 1.

3. The outer side of the backrest is provided with a track that slidably engages with the blocking block.

3. A child safety seat according to claim 2.

4. The headrest limiting device further comprises a first locking assembly or a second locking assembly, the first locking assembly a first elastic restoring member attached to the backrest and connected to the first locking member; a first traction rope having a first end connected to a first connection point of the support leg and a second end connected to the first elastic return member; When the support leg is in the unfolded state, the first elastic restoring member maintains the first locking member in the extended state, and when the support leg is in the folded state, the first elastic restoring member receives a force from the first towing rope and is deformed, causing the first locking member to switch from the extended state to the stored state, the second locking assembly a second elastic restoring member attached to the backrest and connected to the second locking member; a second traction rope having a first end connected to the second connection point of the support leg and a second end connected to the second elastic return member; When the support leg is in the folded state, the second elastic restoring member maintains the second locking member in the extended state, and when the support leg is in the unfolded state, the second elastic restoring member receives a force from the second towing rope and is deformed, causing the second locking member to switch from the extended state to the stored state. A child safety seat according to any one of claims 1 to 3.

5. The first elastic restoring member is integrally formed with the first locking member, or the second elastic restoring member is integrally formed with the second locking member.

5. A child safety seat according to claim 4.

6. the support legs are pivotally connected to the base by pivot points; the first connection point is located at an upper portion of the support leg, and the first connection point and the pivot point are spaced apart by a first predetermined distance in the length direction of the support leg; or The second connection point is disposed on an upper portion of the support leg, and the second connection point and the swing point are spaced apart by a second predetermined distance in the length direction of the support leg.

6. A child safety seat according to claim 4 or 5.

7. a first guide portion is provided at a front end of the base, and the first towing rope engages with the front end of the base via the first guide portion, and the length of the first towing rope between the first guide portion and the first connection point when the support leg is in the unfolded state is shorter than the length of the first towing rope between the first guide portion and the first connection point when the support leg is in the folded state; or a second guide portion is provided at the front end of the base, and the second towing rope engages with the front end of the base via the second guide portion, and the length of the second towing rope between the second guide portion and the second connection point when the support leg is in the folded state is shorter than the length of the towing rope between the second guide portion and the second connection point when the support leg is in the unfolded state; 7. A child safety seat according to claim 6.

8. the seat is pivotally connected to the base via a hollow rotating shaft, and the first towing rope passes through the rotating shaft; or The second towing rope passes through the rotating shaft. A child safety seat according to any one of claims 4 to 7.

9. The seat is fixedly connected to the base, and a first guide structure or a second guide structure is provided at the bottom of the base, and the first towing rope passes through the first guide structure, and the second towing rope passes through the second guide structure. A child safety seat according to any one of claims 4 to 8.

10. The first locking assembly further comprises a first mounting seat attached to the backrest and having a first receiving groove, the first elastic restoring member is disposed in the first receiving groove, and a first through-hole is provided at the bottom of the first receiving groove for the first locking member to extend or retract, or The second locking assembly is attached to the backrest and includes a second mounting seat having a second receiving groove, the second elastic restoring member is disposed in the second receiving groove, and a second through-hole is provided at the bottom of the second receiving groove for the second locking member to extend or retract. A child safety seat according to any one of claims 4 to 9.

11. a first drive pin connected to the second end of the first towing rope, received in the first receiving groove, and abutting against the first elastic return member; or a second driving pin connected to the second end of the second towing rope, received in the second receiving groove, and abutting against the second elastic restoring member; 11. The child safety seat of claim 10, further comprising:

12. A first slideway is provided on a groove wall of the first receiving groove, and the first drive pin is slidably fitted into the first slideway; or a second slideway is provided on a groove wall of the second receiving groove, and the second drive pin is slidably fitted into the second slideway; A child safety seat according to claim 11.

13. the first elastic return member is provided with a first opening, and the second end of the first towing rope is provided with a first connecting ring, the first connecting ring being disposed in the first opening and attached to the first driving pin; or The second elastic restoring member has a second opening, and the second end of the second towing rope has a second connecting ring disposed in the second opening and attached to the second driving pin. A child safety seat according to claim 11 or 12.

14. a first end of the first elastic restoring member is connected to the first mounting seat, a second end of the first elastic restoring member extends inclinedly toward the groove bottom of the first mounting groove, and the first locking member is disposed at the second end of the first elastic restoring member; or a first end of the second elastic restoring member connected to the second mounting seat, a second end of the second elastic restoring member extending obliquely toward a groove bottom of the second mounting groove, and the second locking member disposed at the second end of the second elastic restoring member; A child safety seat according to any one of claims 11 to 13.

15. a height adjustment mechanism disposed between the backrest and the headrest, the height adjustment mechanism enabling the headrest to have an upper limit adjustment height and a lower limit adjustment height above the backrest; The height value of the upper limit height is greater than that of the upper adjustment height, or the height value of the lower limit height is less than that of the lower adjustment height. A child safety seat according to any one of claims 1 to 14.

16. The headrest is provided with shoulder strap holes and a seat belt restraint, The lower limit adjustment height and the upper adjustment height correspond to the distance between the lower edge of the shoulder belt hole and the upper surface of the seat bottom, or the upper limit adjustment height and the lower adjustment height correspond to the distance between the lower edge of the seat belt restraint and the upper surface of the seat bottom of the seat; 16. A child safety seat according to claim 15.

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