CHILD SAFETY SEAT

A child safety seat includes: a base provided with a pivotable support leg; a seat having a backrest, the backrest being provided with a height-adjustable headrest; a headrest limiting device operably connected to the support leg and including a first locking member, when the support leg is in an unfolded state, the first locking member is in an extended state, so that the first locking member is capable of being engaged with the headrest, thereby limiting an upper adjustment height of the headrest, and when the support leg is in a folded state, the first locking member is in a retracted state; or a second locking member, when the support leg is in the unfolded state, the second locking member is in a retracted, and when the support leg is in the folded state, the second locking member is in an extended state, so that the second locking member is capable of being engaged with the headrest, thereby limiting a lower adjustment height of the headrest.

TECHNICAL FIELD

The present application relates to a child safety seat.

BACKGROUND

The child safety seat is used in vehicle to facilitate parents to travel with their children. Generally, the conventional child safety seat is usually provided with a headrest to support and protect the child's head, and the height of the headrest is adjustable to accommodate children of different heights. The height adjustment range of the headrest is generally relatively large to accommodate the needs of children as they grow to different heights. If the parent is not skilled in the use of child safety seat, it is easy to adjust the height of the headrest to an inappropriate height, so that the headrest cannot effectively protect the child's head. For example, for an infant passenger, the headrest is not suitable for being adjusted above a certain height, whereas for an older child passenger, the headrest is not suitable for being adjusted below a certain height.

SUMMARY

The present application provides a child safety seat including a base provided with a pivotable support leg; a seat having a backrest, the backrest being provided with a height-adjustable headrest; a headrest limiting device operably connected to the support leg and including a first locking member, when the support leg is in an unfolded state, the first locking member is in an extended state, so that the first locking member is capable of being engaged with the headrest, thereby limiting an upper adjustment height of the headrest, and when the support leg is in a folded state, the first locking member is in a retracted state; or a second locking member, when the support leg is in the unfolded state, the second locking member is in a retracted, and when the support leg is in the folded state, the second locking member is in an extended state, so that the second locking member is capable of being engaged with the headrest, thereby limiting a lower adjustment height of the headrest.

Furthermore, the headrest is disposed on an inner side of the backrest, an outer side of the backrest is provided with a blocking block connected to the headrest, and the blocking block is adapted to move up and down following the headrest. The blocking block includes an upper limiting surface that is adapted to be engaged with the first locking member, or the blocking block includes a lower limiting surface that is adapted to be engaged with the second locking member.

Furthermore, the outer side of the backrest is provided with a track in sliding fit with the blocking block.

Furthermore, the headrest limiting device further includes: a first locking assembly including: a first elastic restoring member mounted on the backrest and connected to the first locking member; a first pulling rope having a first end and a second end, the first end being connected to a first connection point of the support leg, and the second end being operably connected to the first elastic restoring 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 is subjected to a force from the first pulling rope and deformed, so that the first locking member is switched from the extended state to the retracted state; or, a second locking assembly including: a second clastic restoring member mounted on the backrest and connected to the second locking member; a second pulling rope having a first end and a second end, the first end being connected to a second connection point of the support leg, and the second end being operably connected to the second clastic restoring 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 is subjected to a force from the second pulling rope and deformed, so that the second locking member is switched from the extended state to the retracted state.

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.

Furthermore, the support leg is pivotally connected to the base by a pivot point. The first connection point is disposed on a top portion of the support leg, and the first connection point and the pivot point are spaced apart by a first preset distance in a length direction of the support leg, or the second connection point is disposed on the top portion of the support leg, and the second connection point and the pivot point are spaced apart by a second preset distance in the length direction of the support leg.

Furthermore, a front end of the base is provided with a first guide portion through which the first pulling rope is engaged with the front end of the base, a length of the first pulling rope between the first guide portion and the first connection point when the support leg is in the unfolded state is smaller the length of the first pulling rope between the first guide portion and the first connection point when the support leg is in the folded state, or, the front end of the base is provided with a second guide portion through which the second pulling rope is engaged with the front end of the base, a length of the second pulling rope between the second guide portion and the second connection point when the support leg is in the folded state is smaller the length of the second pulling rope between the second guide portion and the second connection point when the support leg is in the unfolded state.

Furthermore, the seat is pivotally connected to the base through a hollow rotating shaft, the first pulling rope passes through the rotating shaft, or the second pulling rope passes through the rotating shaft.

Furthermore, the seat is fixed and connected to the base, a bottom of the base is provided with a first guide structure or a second guide structure, the first pulling rope passes through the first guide structure, and the second pulling rope passes through the second guide structure.

Furthermore, the first locking assembly further includes a first mounting seat mounted on the backrest and having a first receiving groove, the first elastic resetting member is located in the first receiving groove, and a groove bottom of the first receiving groove is provided with a first through hole for the first locking member to be extended or retracted; or, the second locking assembly further includes a second mounting seat mounted on the backrest and having a second receiving groove, the second elastic restoring member is located in the second receiving groove, and a groove bottom of the second receiving groove is provided with a second through hole for the second locking member to be extended or retracted.

Furthermore, a first driving pin is connected to the second end of the first pulling rope, and the first driving pin is received in the first receiving groove and is abutted against the first clastic restoring member; or, a second driving pin is connected to the second end of the second pulling rope, and the second driving pin is received in the second receiving groove and is abutted against the second elastic restoring member.

Furthermore, a groove wall of the first receiving groove is provided with a first slideway, and the first driving pin is in sliding fit with the first slideway; or a groove wall of the second receiving groove is provided with a second slideway, and the second driving pin is in sliding fit with the second slideway.

Furthermore, the first elastic restoring member is provided with a first opening, the second end of the first pulling rope is provided with a first connecting ring, and the first connecting ring is located in the first opening and sleeved on the first driving pin; or, the second elastic restoring member is provided with a second opening, the second end of the second pulling rope is provided with a second connecting ring, and the second connecting ring is located in the second opening and sleeved on the second driving pin.

Furthermore, a first end of the first clastic restoring member is connected to the first mounting seat, a second end of the first clastic restoring member is extended obliquely toward a groove bottom of the first mounting groove, and the first locking member is located on the second end of the first clastic restoring member; or, a first end of the second elastic restoring member is connected to the second mounting seat, a second end of the second elastic restoring member is extended obliquely toward a groove bottom of the second mounting groove, and the second locking member is located on the second end of the second elastic restoring member.

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

Furthermore, the headrest is provided with a shoulder belt hole and a seatbelt restrainer. The lower limit adjustment height and the upper adjustment height correspond to a distance between a lower edge of the shoulder belt hole and an upper surface of a seat portion of the seat, or the upper limit adjustment height and the lower adjustment height correspond to a distance between a lower edge of the seatbelt restrainer and an upper surface of the seat portion of the seat.

DETAILED DESCRIPTION OF THE EMBODIMENTS

FIGS.1,2, and6show a structure of a child safety seat100according to an embodiment of the present application. The child safety seat100includes a base1and a seat2. In this embodiment, the seat2is rotatably disposed on the base1. In this case, the seat2may have a forward mounting position and a reverse mounting position with respect to the base1.FIG.1shows a perspective view of the seat2mounted on the base1in a forward direction, it could be understood that the face of a child seated on the seat2mounted in the forward direction faces forward.FIG.2shows a perspective view of the seat2mounted on the base1in a reverse direction, it could be understood that the face of a child seated on the seat2mounted in the reverse direction faces backward. In other embodiments, the seat2may be fixed on the base1and thus cannot be rotated relative to the base1.

It should be noted that, unless otherwise specified, orientation terms such as “front”, “rear”, “left”, “right”, “upper” and “lower” in this embodiment correspond to the directions of “front”, “back”, “left”, “right”, “up”, “down” of the vehicle. These orientation terms are only intended to make the description of the embodiments of the present application clearer, and are not intended to improperly limit the protection scope of the present application.

Referring toFIGS.3and4, a front end of the base1is provided with a pivotable support leg11, which is pivotally connected to the base1by a pivot point11a. The support leg11has an unfolded state (FIG.1) and a folded state (FIG.5) with respect to the base1. The seat2has a seat portion21and a backrest22provided with a height-adjustable headrest23, so that the headrest23may be adjusted according to the height of child. For example, a height adjustment mechanism4is disposed between the backrest22and the headrest23, and the height adjustment mechanism4may be known in the art. The height adjustment mechanism4allows the height of the headrest23on the backrest22(seeFIG.17, a distance of the headrest23relative to an upper surface of the seat21) to be adjusted, so as to adapt the headrest23to children of different heights. The height adjustment mechanism4allows the headrest23to have an upper limit adjustment height H3and a lower limit adjustment height H4, and allows the headrest23to be fixed at any of a plurality of adjustment positions between the upper limit adjustment height H3and the lower limit adjustment height H4. That is, a height adjustment range provided by the height adjustment mechanism4for the headrest23is in a range from H3to H4.

Referring toFIGS.1,5, and17, for the child safety seat100suitable for the height of young children (such as, 0 to 4 years of age) and older children (such as, 3 to 12 years old), the headrest23is provided with a seatbelt restrainer237and a shoulder belt hole236, and the seatbelt restrainer237is located above the shoulder belt hole236. When a young child is seated in the child safety seat100(for example, the support leg11needs to be unfolded in this case), the seatbelt of the child safety seat100passes through the shoulder belt hole236, and the child safety seat100secures the child in the child safety seat100by a self-configured seatbelt. When an older child is seated in the child safety seat100, the seatbelt of the vehicle seat passes through the seatbelt restrainer237when engaged with the child safety seat100. By means of the shoulder belt hole236or the seatbelt restrainer237, the seatbelt of the vehicle seat provides reliable protection to the child seated in the child safety seat100without affecting the child's riding comfort.

In the art, when the headrest23is used for young children, the height of the headrest23generally refers to a distance between a lower edge of the shoulder belt hole236and an upper surface of the seat portion21. The lower limit adjustment height H4refers to, for example, the minimum distance between from the lower edge of the shoulder belt hole236to the upper surface of the seat portion21. When the headrest23is used for older children, the height of the headrest23generally refers to a distance between a lower edge of the seatbelt restrainer237and the upper surface of the seat portion21. The upper limit adjustment height H3refers to, for example, the maximum distance from the lower edge of the seatbelt restrainer237to the upper surface of the seat portion21.

The child safety seat100further includes a headrest limiting device3operably connected to the support leg11. The headrest limiting device3has different working states according to the change of the working mode (unfolded or folded) of the support leg11.

In this embodiment, referring toFIGS.7,8, and17, the headrest limiting device3has a first locking member301. When the support leg11is in the unfolded state, the first locking member301is in an extended state, so as to be engaged with the headrest23, thereby limiting an upper adjustment height H1of the headrest23(in connection with the above, the upper adjustment height H1refers to, for example, a distance from a lower edge of the shoulder belt hole236to the upper surface of the seat portion21). When the support leg11is in the folded state, the first locking member301is in a retracted state. Referring toFIGS.12,13, and17, the headrest limiting device3has a second locking member302. When the support leg11is in the unfolded state, the second locking member302is in the retracted state. When the support leg302is in the folded state, the second locking member302is in the extended state, so as to be engaged with the headrest23, thereby limiting a lower adjustment height H2of the headrest23(in connection with the above, the lower adjustment height H2refers to, for example, a distance from the lower edge of the seatbelt restrainer237to the upper surface of the seat portion21). A height value of the upper limit adjustment height H3is greater than a height value of the upper adjustment height H1, and the height value of the upper adjustment height H1is greater than a height value of the lower limit adjustment height H4; and the height value of lower limit adjustment height H4is smaller than a height value of the lower adjustment height H2, and the height value of the lower adjustment height H2is smaller than the height value of the upper limit adjustment height H3.

Generally, the child safety seat100is more suitable for young children (such as, infants), when supported by the support leg11(i.e., the support leg11is in the unfolded state in the use state of the child safety seat100). In this case, the headrest23needs to be adjusted to a lower position range. The child safety seat100is more suitable for older children, when not supported by the support leg11(i.e., the support leg11is in the folded state in the use state of the child safety seat100). In this case, the headrest needs to be adjusted to a higher position range.

In order to avoid improper use of the headrest23when the support leg11of the child safety seat100is in different modes, in an embodiment of the present application, the headrest limiting device3is configured to be operably connected to the support leg11. When the support leg11is in the unfolded state for children to ride, the first locking member301of the headrest limiting device3is in the extended state and the second locking member302of the headrest limiting device3is in the retracted state, thereby limiting the upper adjustment height H1of the headrest23when the support leg11is in the unfolded state. In this case, the height adjustment range of the headrest23is, for example, in a range from H4to H1(for example, in a range from 274 mm to 391 mm). As a result, when the infant child is seated in the child safety seat, the improper use of the headrest caused by the parent adjusting the headrest23too high is avoided, thereby improving the safety and comfort of infants. When the support leg11is in the folded state for older children to ride, the second locking member302of the headrest limiting device3is in the extended state and the first locking member301of the headrest limiting device3is in the retracted state, thereby limiting the lower adjustment height H2of the headrest23when the support leg11is in the folded state. In this case, the height adjustment range of the headrest23is, for example, in a range from H2to H3(for example, in a range from 324 mm to 533 mm). As a result, when the older child is seated in the child safety seat, the improper use of the headrest caused by the parent adjusting the headrest23too low is avoided, thereby improving the safety and comfort of infants.

In some embodiments, a height difference HS between the upper adjustment height H1and the lower adjustment height H2is not equal to a height difference between the lower edge of the seatbelt restrainer237and the lower edge of the shoulder belt hole236, and even the height value of the upper adjustment height H1is greater than the height value of the lower adjustment height H2. That is, the position adjustment range of the headrest23when the support leg11is in the unfolded state and the position adjustment range of the headrest23when the support legs11is in the folded state may be partially overlapping. In other embodiments (e.g., as shown inFIG.17), the height difference HS of the upper adjustment height H1and the lower adjustment height H2is, for example, equal to the height difference of the lower edge of the seatbelt restrainer237and the lower edge of the shoulder belt hole236.

Referring toFIGS.1and6, the headrest23is disposed on an inner side221of the backrest22, and an outer side222of the backrest22is provided with a blocking block24connected to the headrest23, and the blocking block24is adapted to move up and down following the headrest23. The blocking block24is detachably connected to the headrest23, for example, by means of a bolt (not numbered in figures), the outer side222of the backrest22is provided with, for example, a track2221in sliding fit with the blocking block24. The blocking block24includes an upper limiting surface241that is adapted to be engaged with the first locking member301, and the blocking block may further include a lower limiting surface242that is adapted to be engaged with the second locking member302. As a result, the first locking member301, the second locking member302is indirectly engaged with the headrest23by the blocking block24, thereby limiting the upper adjustment height H1and the lower adjustment height H2of the headrest23. The blocking block24adapted to move following the headrest23is disposed on the outer side222of the backrest22, so that the extension directions of the first locking member301and the second locking member302are both configured to face the direction away from the back of the child passenger. On the one hand, the outer space of the backrest22is fully utilized, and on the other hand, the structure of the headrest23itself is not greatly affected.

Referring toFIG.3, the headrest limiting device3may further include a first locking assembly31and a second locking assembly32.FIGS.7to11show a preferred embodiment of the first locking assembly31, andFIGS.12to15show a preferred embodiment of the second locking assembly32.

Referring toFIGS.3,4,7to11, and16, the first locking assembly31may include a first elastic restoring member311and a first pulling rope312. The first elastic restoring member311is mounted on the backrest22and connected to the first locking member301. The first elastic restoring member311may be, for example, an elastic sheet and made of metal or plastic or other suitable material. The first locking member301may be a locking pin, which is attached to or integrally formed with the first elastic restoring member311. The first pulling rope312may be, for example, a steel wire, a first end3121of the first pulling rope312is connected to a first connection point111of the support leg, and the second end3122of the first pulling rope312is operably connected to the first elastic restoring member311. It should be noted that the operable connection between the first pulling rope312and the first elastic restoring member311may be a direct connection, an indirect connection, a direct contact or an indirect contact, etc., such that an active action of one of the first pulling rope312and the first elastic restoring member311causes a passive action of the other.

By reasonably setting the path of the first pulling rope312, the first locking assembly31meets the following conditions: when the support leg11is in the unfolded state (as described above, generally corresponding to the situation of infants riding, it is necessary to control the position of the headrest23not to be too high), the first clastic restoring member311maintains the first locking member301in the extended state. When the headrest23moves from bottom to top and reaches the upper adjustment height H1, the first locking member301is abutted against the upper limiting surface241, thereby restricting the headrest23from moving higher than the upper adjustment height H1. When the support leg11is switched from the unfolded state to the folded state, the support leg11pulls the first pulling rope312, and the first elastic restoring member311is subjected to a force from the first pulling rope312and deformed elastically, and the elastic deformation of the first clastic restoring member311drives the first locking member301to be switched from the extended state to the retracted state. In this case, the first locking member301no longer restricts the headrest23from moving higher than the upper adjustment height H1. It could be understood that when the support leg11is switched from the folded state to the unfolded state, the first clastic restoring member311may reversely pull the first pulling rope312under the action of clastic restoring force, and bring the first locking member301return to the extended state.

Referring toFIGS.3,4, and12to16, the second locking assembly32includes a second elastic restoring member321and a second pulling rope322. The second elastic restoring member321is mounted on the backrest22and connected to the second locking member302. The second elastic restoring member321may be, for example, an elastic sheet and made of metal or plastic or other suitable material. The second locking member302may be a locking pin, which is attached to or integrally formed with the second elastic restoring member321. The second pulling rope322may be, for example, a steel wire, a first end3221of the second pulling rope322is connected to a second connection point112of the support leg11, and the second end3222of the second pulling rope312is operably connected to the second elastic restoring member321. It should be noted that the operable connection between the second pulling rope322and the second elastic restoring member321may be a direct connection, an indirect connection, a direct contact or an indirect contact, etc., such that an active action of one of the second pulling rope322and the second elastic restoring member321causes a passive action of the other.

By reasonably setting the path of the second pulling rope322, the second locking assembly32meets the following conditions: when the support leg11is in the folded state (as described above, generally corresponding to the situation of older children riding, it is necessary to control the position of the headrest23not to be too low), the second elastic restoring member321maintains the second locking member302in the extended state. When the headrest23moves from top to bottom and reaches the lower adjustment height H2, the second locking member302is abutted against the lower limiting surface242, thereby restricting the headrest23from moving lower than the lower adjustment height H2. When the support leg11is switched from the folded state to the unfolded state, the support leg11pulls the second pulling rope322, and the second clastic restoring member321is subjected to a force from the second pulling rope322and deformed elastically, and the clastic deformation of the second elastic restoring member321drives the second locking member302to be switched from the extended state to the retracted state. In this case, the second locking member302no longer restricts the headrest23from moving lower than the lower adjustment height H2. It could be understood that when the support leg11is switched from the unfolded state to the folded state, the second elastic restoring member321may reversely pull the second pulling rope322under the action of elastic restoring force, and bring the second locking member302return to the extended state.

Referring toFIGS.3to5, in this embodiment, the first connection point111is disposed on a top portion110of the support leg11, and the first connection point111and the pivot point11aof the support leg11are spaced apart by a first preset distance L1in a length direction L of the support leg11. The second connection point112is disposed on the top portion110of the support leg11, and the second connection point112and the pivot point11aof the support leg11are spaced apart by a second preset distance L2in the length direction L of the support leg11. In some embodiments, the first preset distance L1is equal to the second preset distance L2. In some embodiments, the first connection point111and the second connection point112may be the same connection point.

Referring toFIGS.3,5, and16, in this embodiment, the first pulling rope312and the second pulling rope322, for example, may be configured as follows.

A first guide portion101is disposed on a front end of a bottom portion of the base1(for case of understanding, the base1is not shown inFIGS.3and5), and the first pulling rope312is engaged with the front end of the base1through the first guide portion101. The first guide portion101is, for example, located behind the first connection point111. When the support leg11is in the unfolded state, a length of the first pulling rope between the first guide portion101and the first connection point111is relatively small, and when the support leg11is in the folded state, the length of the first pulling rope between the first guide portion101and the first connection point111is relatively great. InFIG.3, S1indicates the length of the first pulling rope312between the first guide portion101and the first connection point111when the support leg11is in the unfolded state. InFIG.5, S2indicates the length of the first pulling rope312between the first guide portion101and the first connection point111when the support leg11is in the folded state. S1is less than S2. The second end3122of the first pulling rope312extends upwardly through the first guide portion101and the bottom portion of the base1, and is connected to the first elastic restoring member311.

A second guide portion102is disposed on the front end of the bottom portion of the base1, and the second pulling rope322is engaged with the front end of the base1through the second guide portion102. The second guide portion102is, for example, located in front of the second connection point112. When the support leg11is in the unfolded state, a length of the second pulling rope between the second guide portion102and the second connection point112is relatively great, and when the support leg11is in the folded state, the length of the second rope between the second guide portion102and the second connection point112is relatively small. InFIG.3, S3indicates the length of the second pulling rope322between the second guide portion102and the second connection point112when the support leg11is in the unfolded state. InFIG.5, S4indicates the length of the second pulling rope322between the second guide portion102and the second connection point112when the support leg11is in the folded state. S3is greater than S4. The second end3222of the second pulling rope322extends upwardly through the second guide portion102and the bottom portion of the base1, and is connected to the second elastic restoring member321.

Referring toFIG.6, in this embodiment, the seat2is pivotally connected to the base1through a hollow rotating shaft20, and for example, the seat2is capable of being rotated 360°. In this case, the second end3122of the first pulling rope312is operably connected to the first elastic restoring member311after passing through a central hole of a rotating shaft20, and the second end3222of the second pulling rope322may be operably connected to the second elastic restoring member321after passing through the central hole of the rotating shaft20. As a result, the first locking assembly31and the second locking assembly32operate normally regardless of whether the seat2is in the forward mounting position or in the reverse mounting position. Referring toFIG.16, it can be seen that in this embodiment, the first pulling rope312and the second pulling rope322intersect with each other in the rotating shaft20. However, in other embodiments, the first pulling rope312and the second pulling rope322may use other suitable paths in which the first pulling rope312and the second pulling rope322may not intersect with each other.

Referring toFIGS.8to11, in this embodiment, the first locking assembly31may further include a first mounting seat331mounted on the backrest22and having a first receiving groove3310in which the first clastic restoring member311is located. The first elastic restoring member311is mounted on the backrest22through the first mounting seat331, and the first elastic restoring member311in the first receiving groove3310is not easily interfered by other components. A groove bottom of the first receiving groove3310is provided with a first through hole33101for the first locking member301to be extended or retracted. When the first locking member301is extended from the first through hole33101, the first locking member301is in the extended state, so as to be engaged with the headrest23or the blocking block24. When the first locking member301is retracted from the first through hole33101, the first locking member301is in a retracted state.

Referring toFIGS.13to15, in this embodiment, the second locking assembly32may further include a second mounting seat332mounted on the backrest22and having a second receiving groove3320in which the second elastic restoring member321is located. The second elastic restoring member321is mounted on the backrest22through the second mounting seat332, and the second clastic restoring member321in the second receiving groove3320is not easily interfered by other components. A groove bottom of the second receiving groove3320is provided with a second through hole33201for the second locking member302to be extended or retracted. It could be understood that when the second locking member302is extended from the second through hole33201, the second locking member302is in the extended state, so as to be engaged with the headrest23or the blocking block24. When the second locking member302is retracted from the first through hole33201, the second locking member302is in a retracted state.

This embodiment also shows an operable connection of the first pulling rope312and the first elastic restoring member311, and an operable connection of the second pulling rope322and the second elastic restoring member321.

Referring toFIGS.10and11, the second end3122of the first pulling rope312is connected to a first driving pin341, and the first pulling rope312interacts with the first driving pin341through the first elastic restoring member311. In some embodiments, the first driving pin341is received in the first receiving groove3310and is abutted against the first elastic restoring member311. When the support leg11is switched from the unfolded state to the folded state, the first pulling rope312drives the first elastic restoring member311to be deformed by the first driving pin341, so that the first locking member301is retracted from the first through hole33101.

In some embodiments, a groove wall of the first receiving groove3310is provided with a first slideway33102, and the first driving pin341is in sliding fit with the first slideway33102. The first slideway33102is, for example, an elongated hole, and a stroke provided by the first slideway33102for the first driving pin341is, for example, equal to the difference between the above-mentioned S1and S2. Referring toFIG.8, when the support leg11is switched from the unfolded state to the folded state, the first pulling rope312pulls the first driving pin341to move rightward and downward along the first slideway33102, and the first driving pin341exerts a force on the first clastic restoring member311during the movement, so that the first locking member301moves rightward and upward, and is retracted from the first through hole33101. As a result, when the support leg11of the child safety seat is folded for older children to ride, the first locking member301no longer restricts headrest23from moving upward.

In some embodiments, a middle portion of the first elastic restoring member311is provided with a first opening3110, and the second end3122of the first pulling rope312is provided with a first connecting ring31220, and the first connecting ring31220is located in the first opening3110and sleeved on the first driving pin341.

In some embodiments, the first end3111of the first clastic restoring member311is, for example, riveted or welded together with the first mounting seat331, and the second end3112of the first clastic restoring member311is extended obliquely toward the groove bottom of the first mounting groove3310, thereby having an inclined surface. A first locking member301is located on the second end3112of the first elastic restoring member311. When the pulling force received by the first driving pin341from the first pulling rope312is greater than the pressing force received by the first driving pin341from the first elastic restoring member311, the first driving pin341slides in the first slideway33102and pushes the inclined surface of the first elastic restoring member311at the same time, so that the inclined surface of the first clastic restoring member311is elastically deformed, and the first locking member301is forced to be retracted from the first through hole33101. When the pulling force received by the first driving pin341from the first pulling rope312is smaller than the pressing force received by the first driving pin341from the first elastic restoring member311, the inclined surface of the first elastic restoring member311drives the first driving pin341to slide reversely in the first slideway33102, and at the same time, the first locking member301is extended from the first through hole33101.

Referring toFIG.15, the second end3222of the second pulling rope322is connected to a second driving pin342and the second pulling rope322interacts with the second driving pin342through the second clastic restoring member321. In some embodiments, the second driving pin342is received in the second receiving groove3320and is abutted against the second clastic restoring member321. When the support leg11is switched from the folded state to the unfolded state, the second pulling rope322drives the second elastic restoring member321to be deformed by the second driving pin342, so that the second locking member302is retracted from the second through hole33201.

In some embodiments, a groove wall of the second receiving groove3320is provided with a second slideway33202, and the second driving pin342is in sliding fit with the second slideway33202. The second slideway33202is, for example, an elongated hole, and a stroke provided by the second slideway33202for the second driving pin342is, for example, equal to the difference between the above-mentioned S3and S4. Referring toFIG.13, when the support leg11is switched from the folded state to the unfolded state, the second pulling rope322pulls the second driving pin342to move rightward and downward along the second slideway33202, and the second driving pin342exerts a force on the second elastic restoring member321during the movement, so that the second locking member302moves rightward and upward, and is retracted from the second through hole33201. When the support leg11of the child safety seat is unfolded for young children to ride, the second locking member302no longer restricts headrest23from moving downward.

In some embodiments, a middle portion of the second elastic restoring member321is provided with a second opening3210, and the second end3222of the second pulling rope322is provided with a second connecting ring32220, and the second connecting ring32220is located in the second opening3210and sleeved on the second driving pin342.

In some embodiments, the first end3211of the second clastic restoring member321is, for example, riveted or welded together with the second mounting seat332, and the second end3212of the second elastic restoring member321is extended obliquely toward the groove bottom of the second mounting groove3320, thereby having an inclined surface. A second locking member302is located on the second end3212of the second clastic restoring member321. When the pulling force received by the second driving pin342from the second pulling rope322is greater than the pressing force received by the second driving pin342from the second elastic restoring member321, the second driving pin342slides in the second slideway33202and pushes the inclined surface of the second clastic restoring member321at the same time, so that the inclined surface of the second clastic restoring member321is elastically deformed, and the second locking member302is forced to be retracted from the second through hole33201. When the pulling force received by the second driving pin342from the second pulling rope322is smaller than the pressing force received by the second driving pin342from the second elastic restoring member321, the inclined surface of the second elastic restoring member321drives the second driving pin342to slide reversely in the second slideway33202, and at the same time, the second locking member302is extended from the second through hole33201.

The above-mentioned first mounting seat331and second mounting seat332may be disposed on the middle of the backrest22and be arranged to be spaced apart from left to right.

In this embodiment, the headrest limiting device3includes both a first locking member301and a second locking member302. However, in practical applications, the headrest limiting device3may only include one of the first locking member301and the second locking member302. Only one of the first locking assembly31and the second locking assembly32associated with the first locking member301and the second locking member302, respectively, may be provided accordingly.

The headrest limiting device3, the first locking assembly31and the second locking assembly32may have various embodiments in other embodiments, and are not limited to the above-described examples, as long as the object of the present application can be achieved.

In the above-mentioned embodiment, the first locking member301and the second locking member302are abutted against and engaged with the blocking block24to restrict the headrest23from moving upward and downward. In other embodiments, the blocking block24may not be provided, and the first locking member301and the second locking member302may be, for example, directly abutted against and engaged with the headrest23to restrict the headrest23from moving upward and downward.

In the above-mentioned embodiments, the child safety seat100in which the seat2is pivotally connected to the base1is used as an example for description. In other unshown embodiments, the headrest limiting device3of the embodiment of the present application may also be applied to the child safety seat100in which the seat2is fixedly connected to the base1. In this case, a first guide structure or a second guide structure (not shown) may be disposed on the bottom portion of the base1. The second end3122of the first pulling rope312passes through and is guided upward by the first guide structure, and then, is operably connected to the first elastic restoring member311. The second end3222of the second pulling rope322passes through and is guided upward by the second guide structure, and then, is operably connected to the second elastic restoring member321.

Each of the technical features of the above-mentioned embodiments may be combined arbitrarily. To simplify the description, not all the possible combinations of each of the technical features in the above embodiments are described. However, all of the combinations of these technical features should be considered as within the scope of this application, as long as such combinations do not contradict with each other.

The above embodiments merely illustrate several embodiments of the present application, and the description thereof is specific and detailed, but it shall not be constructed as limiting the scope of the present application.

It should be noted that a plurality of variations and modifications may be made by those skilled in the art without departing from the scope of this application, which are all within the scope of protection of this application.

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