Patent Description:
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. <CIT> discloses a child safety seat with an adjustable headrest.

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 elastic 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 elastic 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 elastic 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 elastic restoring member is connected to the first mounting seat, a second end of the first elastic 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 elastic 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.

<FIG>, <FIG>, and <FIG> show a structure of a child safety seat <NUM> according to an embodiment of the present application. The child safety seat <NUM> includes a base <NUM> and a seat <NUM>. In this embodiment, the seat <NUM> is rotatably disposed on the base <NUM>. In this case, the seat <NUM> may have a forward mounting position and a reverse mounting position with respect to the base <NUM>. <FIG> shows a perspective view of the seat <NUM> mounted on the base <NUM> in a forward direction, it could be understood that the face of a child seated on the seat <NUM> mounted in the forward direction faces forward. <FIG> shows a perspective view of the seat <NUM> mounted on the base <NUM> in a reverse direction, it could be understood that the face of a child seated on the seat <NUM> mounted in the reverse direction faces backward. In other embodiments, the seat <NUM> may be fixed on the base <NUM> and thus cannot be rotated relative to the base <NUM>.

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 to <FIG> and <FIG>, a front end of the base <NUM> is provided with a pivotable support leg <NUM>, which is pivotally connected to the base <NUM> by a pivot point 11a. The support leg <NUM> has an unfolded state (<FIG>) and a folded state (<FIG>) with respect to the base <NUM>. The seat <NUM> has a seat portion <NUM> and a backrest <NUM> provided with a height-adjustable headrest <NUM>, so that the headrest <NUM> may be adjusted according to the height of child. For example, a height adjustment mechanism <NUM> is disposed between the backrest <NUM> and the headrest <NUM>, and the height adjustment mechanism <NUM> may be known in the art. The height adjustment mechanism <NUM> allows the height of the headrest <NUM> on the backrest <NUM> (see <FIG>, a distance of the headrest <NUM> relative to an upper surface of the seat <NUM>) to be adjusted, so as to adapt the headrest <NUM> to children of different heights. The height adjustment mechanism <NUM> allows the headrest <NUM> to have an upper limit adjustment height H3 and a lower limit adjustment height H4, and allows the headrest <NUM> to 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, a height adjustment range provided by the height adjustment mechanism <NUM> for the headrest <NUM> is in a range from H3 to H4.

Referring to <FIG>, <FIG>, and <FIG>, for the child safety seat <NUM> suitable for the height of young children (such as, <NUM> to <NUM> years of age) and older children (such as, <NUM> to <NUM> years old), the headrest <NUM> is provided with a seatbelt restrainer <NUM> and a shoulder belt hole <NUM>, and the seatbelt restrainer <NUM> is located above the shoulder belt hole <NUM>. When a young child is seated in the child safety seat <NUM> (for example, the support leg <NUM> needs to be unfolded in this case), the seatbelt of the child safety seat <NUM> passes through the shoulder belt hole <NUM>, and the child safety seat <NUM> secures the child in the child safety seat <NUM> by a self-configured seatbelt. When an older child is seated in the child safety seat <NUM>, the seatbelt of the vehicle seat passes through the seatbelt restrainer <NUM> when engaged with the child safety seat <NUM>. By means of the shoulder belt hole <NUM> or the seatbelt restrainer <NUM>, the seatbelt of the vehicle seat provides reliable protection to the child seated in the child safety seat <NUM> without affecting the child's riding comfort.

In the art, when the headrest <NUM> is used for young children, the height of the headrest <NUM> generally refers to a distance between a lower edge of the shoulder belt hole <NUM> and an upper surface of the seat portion <NUM>. The lower limit adjustment height H4 refers to, for example, the minimum distance between from the lower edge of the shoulder belt hole <NUM> to the upper surface of the seat portion <NUM>. When the headrest <NUM> is used for older children, the height of the headrest <NUM> generally refers to a distance between a lower edge of the seatbelt restrainer <NUM> and the upper surface of the seat portion <NUM>. The upper limit adjustment height H3 refers to, for example, the maximum distance from the lower edge of the seatbelt restrainer <NUM> to the upper surface of the seat portion <NUM>.

The child safety seat <NUM> further includes a headrest limiting device <NUM> operably connected to the support leg <NUM>. The headrest limiting device <NUM> has different working states according to the change of the working mode (unfolded or folded) of the support leg <NUM>.

In this embodiment, referring to <FIG>, <FIG>, and <FIG>, the headrest limiting device <NUM> has a first locking member <NUM>. When the support leg <NUM> is in the unfolded state, the first locking member <NUM> is in an extended state, so as to be engaged with the headrest <NUM>, thereby limiting an upper adjustment height H1 of the headrest <NUM> (in connection with the above, the upper adjustment height H1 refers to, for example, a distance from a lower edge of the shoulder belt hole <NUM> to the upper surface of the seat portion <NUM>). When the support leg <NUM> is in the folded state, the first locking member <NUM> is in a retracted state. Referring to <FIG>, and <FIG>, the headrest limiting device <NUM> has a second locking member <NUM>. When the support leg <NUM> is in the unfolded state, the second locking member <NUM> is in the retracted state. When the support leg <NUM> is in the folded state, the second locking member <NUM> is in the extended state, so as to be engaged with the headrest <NUM>, thereby limiting a lower adjustment height H2 of the headrest <NUM> (in connection with the above, the lower adjustment height H2 refers to, for example, a distance from the lower edge of the seatbelt restrainer <NUM> to the upper surface of the seat portion <NUM>). A height value of the upper limit adjustment height H3 is greater than a height value of the upper adjustment height H1, and the height value of the upper adjustment height H1 is greater than a height value of the lower limit adjustment height H4; and the height value of lower limit adjustment height H4 is smaller than a height value of the lower adjustment height H2, and the height value of the lower adjustment height H2 is smaller than the height value of the upper limit adjustment height H3.

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

In order to avoid improper use of the headrest <NUM> when the support leg <NUM> of the child safety seat <NUM> is in different modes, in an embodiment of the present application, the headrest limiting device <NUM> is configured to be operably connected to the support leg <NUM>. When the support leg <NUM> is in the unfolded state for children to ride, the first locking member <NUM> of the headrest limiting device <NUM> is in the extended state and the second locking member <NUM> of the headrest limiting device <NUM> is in the retracted state, thereby limiting the upper adjustment height H1 of the headrest <NUM> when the support leg <NUM> is in the unfolded state. In this case, the height adjustment range of the headrest <NUM> is, for example, in a range from H4 to H1 (for example, in a range from <NUM> to <NUM>). 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 headrest <NUM> too high is avoided, thereby improving the safety and comfort of infants. When the support leg <NUM> is in the folded state for older children to ride, the second locking member <NUM> of the headrest limiting device <NUM> is in the extended state and the first locking member <NUM> of the headrest limiting device <NUM> is in the retracted state, thereby limiting the lower adjustment height H2 of the headrest <NUM> when the support leg <NUM> is in the folded state. In this case, the height adjustment range of the headrest <NUM> is, for example, in a range from H2 to H3 (for example, in a range from <NUM> to <NUM>). 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 headrest <NUM> too low is avoided, thereby improving the safety and comfort of infants.

In some embodiments, a height difference HS between the upper adjustment height H1 and the lower adjustment height H2 is not equal to a height difference between the lower edge of the seatbelt restrainer <NUM> and the lower edge of the shoulder belt hole <NUM>, and even 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 <NUM> when the support leg <NUM> is in the unfolded state and the position adjustment range of the headrest <NUM> when the support legs <NUM> is in the folded state may be partially overlapping. In other embodiments (e.g., as shown in <FIG>), the height difference HS of the upper adjustment height H1 and the lower adjustment height H2 is, for example, equal to the height difference of the lower edge of the seatbelt restrainer <NUM> and the lower edge of the shoulder belt hole <NUM>.

Referring to <FIG> and <FIG>, the headrest <NUM> is disposed on an inner side <NUM> of the backrest <NUM>, and an outer side <NUM> of the backrest <NUM> is provided with a blocking block <NUM> connected to the headrest <NUM>, and the blocking block <NUM> is adapted to move up and down following the headrest <NUM>. The blocking block <NUM> is detachably connected to the headrest <NUM>, for example, by means of a bolt (not numbered in figures), the outer side <NUM> of the backrest <NUM> is provided with, for example, a track <NUM> in sliding fit with the blocking block <NUM>. The blocking block <NUM> includes an upper limiting surface <NUM> that is adapted to be engaged with the first locking member <NUM>, and the blocking block may further include a lower limiting surface <NUM> that is adapted to be engaged with the second locking member <NUM>. As a result, the first locking member <NUM>, the second locking member <NUM> is indirectly engaged with the headrest <NUM> by the blocking block <NUM>, thereby limiting the upper adjustment height H1 and the lower adjustment height H2 of the headrest <NUM>. The blocking block <NUM> adapted to move following the headrest <NUM> is disposed on the outer side <NUM> of the backrest <NUM>, so that the extension directions of the first locking member <NUM> and the second locking member <NUM> are both configured to face the direction away from the back of the child passenger. On the one hand, the outer space of the backrest <NUM> is fully utilized, and on the other hand, the structure of the headrest <NUM> itself is not greatly affected.

Referring to <FIG>, the headrest limiting device <NUM> may further include a first locking assembly <NUM> and a second locking assembly <NUM>. <FIG> show a preferred embodiment of the first locking assembly <NUM>, and <FIG> show a preferred embodiment of the second locking assembly <NUM>.

Referring to <FIG>, <FIG>, <FIG>, and <FIG>, the first locking assembly <NUM> may include a first elastic restoring member <NUM> and a first pulling rope <NUM>. The first elastic restoring member <NUM> is mounted on the backrest <NUM> and connected to the first locking member <NUM>. The first elastic restoring member <NUM> may be, for example, an elastic sheet and made of metal or plastic or other suitable material. The first locking member <NUM> may be a locking pin, which is attached to or integrally formed with the first elastic restoring member <NUM>. The first pulling rope <NUM> may be, for example, a steel wire, a first end <NUM> of the first pulling rope <NUM> is connected to a first connection point <NUM> of the support leg, and the second end <NUM> of the first pulling rope <NUM> is operably connected to the first elastic restoring member <NUM>. It should be noted that the operable connection between the first pulling rope <NUM> and the first elastic restoring member <NUM> may 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 rope <NUM> and the first elastic restoring member <NUM> causes a passive action of the other.

By reasonably setting the path of the first pulling rope <NUM>, the first locking assembly <NUM> meets the following conditions: when the support leg <NUM> is in the unfolded state (as described above, generally corresponding to the situation of infants riding, it is necessary to control the position of the headrest <NUM> not to be too high), the first elastic restoring member <NUM> maintains the first locking member <NUM> in the extended state. When the headrest <NUM> moves from bottom to top and reaches the upper adjustment height H1, the first locking member <NUM> is abutted against the upper limiting surface <NUM>, thereby restricting the headrest <NUM> from moving higher than the upper adjustment height H1. When the support leg <NUM> is switched from the unfolded state to the folded state, the support leg <NUM> pulls the first pulling rope <NUM>, and the first elastic restoring member <NUM> is subjected to a force from the first pulling rope <NUM> and deformed elastically, and the elastic deformation of the first elastic restoring member <NUM> drives the first locking member <NUM> to be switched from the extended state to the retracted state. In this case, the first locking member <NUM> no longer restricts the headrest <NUM> from moving higher than the upper adjustment height H1. It could be understood that when the support leg <NUM> is switched from the folded state to the unfolded state, the first elastic restoring member <NUM> may reversely pull the first pulling rope <NUM> under the action of elastic restoring force, and bring the first locking member <NUM> return to the extended state.

Referring to <FIG>, <FIG>, and <FIG>, the second locking assembly <NUM> includes a second elastic restoring member <NUM> and a second pulling rope <NUM>. The second elastic restoring member <NUM> is mounted on the backrest <NUM> and connected to the second locking member <NUM>. The second elastic restoring member <NUM> may be, for example, an elastic sheet and made of metal or plastic or other suitable material. The second locking member <NUM> may be a locking pin, which is attached to or integrally formed with the second elastic restoring member <NUM>. The second pulling rope <NUM> may be, for example, a steel wire, a first end <NUM> of the second pulling rope <NUM> is connected to a second connection point <NUM> of the support leg <NUM>, and the second end <NUM> of the second pulling rope <NUM> is operably connected to the second elastic restoring member <NUM>. It should be noted that the operable connection between the second pulling rope <NUM> and the second elastic restoring member <NUM> may 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 rope <NUM> and the second elastic restoring member <NUM> causes a passive action of the other.

By reasonably setting the path of the second pulling rope <NUM>, the second locking assembly <NUM> meets the following conditions: when the support leg <NUM> is 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 headrest <NUM> not to be too low), the second elastic restoring member <NUM> maintains the second locking member <NUM> in the extended state. When the headrest <NUM> moves from top to bottom and reaches the lower adjustment height H2, the second locking member <NUM> is abutted against the lower limiting surface <NUM>, thereby restricting the headrest <NUM> from moving lower than the lower adjustment height H2. When the support leg <NUM> is switched from the folded state to the unfolded state, the support leg <NUM> pulls the second pulling rope <NUM>, and the second elastic restoring member <NUM> is subjected to a force from the second pulling rope <NUM> and deformed elastically, and the elastic deformation of the second elastic restoring member <NUM> drives the second locking member <NUM> to be switched from the extended state to the retracted state. In this case, the second locking member <NUM> no longer restricts the headrest <NUM> from moving lower than the lower adjustment height H2. It could be understood that when the support leg <NUM> is switched from the unfolded state to the folded state, the second elastic restoring member <NUM> may reversely pull the second pulling rope <NUM> under the action of elastic restoring force, and bring the second locking member <NUM> return to the extended state.

Referring to <FIG>, in this embodiment, the first connection point <NUM> is disposed on a top portion <NUM> of the support leg <NUM>, and the first connection point <NUM> and the pivot point 11a of the support leg <NUM> are spaced apart by a first preset distance L1 in a length direction L of the support leg <NUM>. The second connection point <NUM> is disposed on the top portion <NUM> of the support leg <NUM>, and the second connection point <NUM> and the pivot point 11a of the support leg <NUM> are spaced apart by a second preset distance L2 in the length direction L of the support leg <NUM>. In some embodiments, the first preset distance L1 is equal to the second preset distance L2. In some embodiments, the first connection point <NUM> and the second connection point <NUM> may be the same connection point.

Referring to <FIG>, <FIG>, and <FIG>, in this embodiment, the first pulling rope <NUM> and the second pulling rope <NUM>, for example, may be configured as follows.

A first guide portion <NUM> is disposed on a front end of a bottom portion of the base <NUM> (for ease of understanding, the base <NUM> is not shown in <FIG> and <FIG>), and the first pulling rope <NUM> is engaged with the front end of the base <NUM> through the first guide portion <NUM>. The first guide portion <NUM> is, for example, located behind the first connection point <NUM>. When the support leg <NUM> is in the unfolded state, a length of the first pulling rope between the first guide portion <NUM> and the first connection point <NUM> is relatively small, and when the support leg <NUM> is in the folded state, the length of the first pulling rope between the first guide portion <NUM> and the first connection point <NUM> is relatively great. In <FIG>, S1 indicates the length of the first pulling rope <NUM> between the first guide portion <NUM> and the first connection point <NUM> when the support leg <NUM> is in the unfolded state. In <FIG>, S2 indicates the length of the first pulling rope <NUM> between the first guide portion <NUM> and the first connection point <NUM> when the support leg <NUM> is in the folded state. S1 is less than S2. The second end <NUM> of the first pulling rope <NUM> extends upwardly through the first guide portion <NUM> and the bottom portion of the base <NUM>, and is connected to the first elastic restoring member <NUM>.

A second guide portion <NUM> is disposed on the front end of the bottom portion of the base <NUM>, and the second pulling rope <NUM> is engaged with the front end of the base <NUM> through the second guide portion <NUM>. The second guide portion <NUM> is, for example, located in front of the second connection point <NUM>. When the support leg <NUM> is in the unfolded state, a length of the second pulling rope between the second guide portion <NUM> and the second connection point <NUM> is relatively great, and when the support leg <NUM> is in the folded state, the length of the second rope between the second guide portion <NUM> and the second connection point <NUM> is relatively small. In <FIG>, S3 indicates the length of the second pulling rope <NUM> between the second guide portion <NUM> and the second connection point <NUM> when the support leg <NUM> is in the unfolded state. In <FIG>, S4 indicates the length of the second pulling rope <NUM> between the second guide portion <NUM> and the second connection point <NUM> when the support leg <NUM> is in the folded state. S3 is greater than S4. The second end <NUM> of the second pulling rope <NUM> extends upwardly through the second guide portion <NUM> and the bottom portion of the base <NUM>, and is connected to the second elastic restoring member <NUM>.

Referring to <FIG>, in this embodiment, the seat <NUM> is pivotally connected to the base <NUM> through a hollow rotating shaft <NUM>, and for example, the seat <NUM> is capable of being rotated <NUM>°. In this case, the second end <NUM> of the first pulling rope <NUM> is operably connected to the first elastic restoring member <NUM> after passing through a central hole of a rotating shaft <NUM>, and the second end <NUM> of the second pulling rope <NUM> may be operably connected to the second elastic restoring member <NUM> after passing through the central hole of the rotating shaft <NUM>. As a result, the first locking assembly <NUM> and the second locking assembly <NUM> operate normally regardless of whether the seat <NUM> is in the forward mounting position or in the reverse mounting position. Referring to <FIG>, it can be seen that in this embodiment, the first pulling rope <NUM> and the second pulling rope <NUM> intersect with each other in the rotating shaft <NUM>. However, in other embodiments, the first pulling rope <NUM> and the second pulling rope <NUM> may use other suitable paths in which the first pulling rope <NUM> and the second pulling rope <NUM> may not intersect with each other.

Referring to <FIG>, in this embodiment, the first locking assembly <NUM> may further include a first mounting seat <NUM> mounted on the backrest <NUM> and having a first receiving groove <NUM> in which the first elastic restoring member <NUM> is located. The first elastic restoring member <NUM> is mounted on the backrest <NUM> through the first mounting seat <NUM>, and the first elastic restoring member <NUM> in the first receiving groove <NUM> is not easily interfered by other components. A groove bottom of the first receiving groove <NUM> is provided with a first through hole <NUM> for the first locking member <NUM> to be extended or retracted. When the first locking member <NUM> is extended from the first through hole <NUM>, the first locking member <NUM> is in the extended state, so as to be engaged with the headrest <NUM> or the blocking block <NUM>. When the first locking member <NUM> is retracted from the first through hole <NUM>, the first locking member <NUM> is in a retracted state.

Referring to <FIG>, in this embodiment, the second locking assembly <NUM> may further include a second mounting seat <NUM> mounted on the backrest <NUM> and having a second receiving groove <NUM> in which the second elastic restoring member <NUM> is located. The second elastic restoring member <NUM> is mounted on the backrest <NUM> through the second mounting seat <NUM>, and the second elastic restoring member <NUM> in the second receiving groove <NUM> is not easily interfered by other components. A groove bottom of the second receiving groove <NUM> is provided with a second through hole <NUM> for the second locking member <NUM> to be extended or retracted. It could be understood that when the second locking member <NUM> is extended from the second through hole <NUM>, the second locking member <NUM> is in the extended state, so as to be engaged with the headrest <NUM> or the blocking block <NUM>. When the second locking member <NUM> is retracted from the first through hole <NUM>, the second locking member <NUM> is in a retracted state.

This embodiment also shows an operable connection of the first pulling rope <NUM> and the first elastic restoring member <NUM>, and an operable connection of the second pulling rope <NUM> and the second elastic restoring member <NUM>.

Referring to <FIG>, the second end <NUM> of the first pulling rope <NUM> is connected to a first driving pin <NUM>, and the first pulling rope <NUM> interacts with the first driving pin <NUM> through the first elastic restoring member <NUM>. In some embodiments, the first driving pin <NUM> is received in the first receiving groove <NUM> and is abutted against the first elastic restoring member <NUM>. When the support leg <NUM> is switched from the unfolded state to the folded state, the first pulling rope <NUM> drives the first elastic restoring member <NUM> to be deformed by the first driving pin <NUM>, so that the first locking member <NUM> is retracted from the first through hole <NUM>.

In some embodiments, a groove wall of the first receiving groove <NUM> is provided with a first slideway <NUM>, and the first driving pin <NUM> is in sliding fit with the first slideway <NUM>. The first slideway <NUM> is, for example, an elongated hole, and a stroke provided by the first slideway <NUM> for the first driving pin <NUM> is, for example, equal to the difference between the above-mentioned S1 and S2. Referring to <FIG>, when the support leg <NUM> is switched from the unfolded state to the folded state, the first pulling rope <NUM> pulls the first driving pin <NUM> to move rightward and downward along the first slideway <NUM>, and the first driving pin <NUM> exerts a force on the first elastic restoring member <NUM> during the movement, so that the first locking member <NUM> moves rightward and upward, and is retracted from the first through hole <NUM>. As a result, when the support leg <NUM> of the child safety seat is folded for older children to ride, the first locking member <NUM> no longer restricts headrest <NUM> from moving upward.

In some embodiments, a middle portion of the first elastic restoring member <NUM> is provided with a first opening <NUM>, and the second end <NUM> of the first pulling rope <NUM> is provided with a first connecting ring <NUM>, and the first connecting ring <NUM> is located in the first opening <NUM> and sleeved on the first driving pin <NUM>.

In some embodiments, the first end <NUM> of the first elastic restoring member <NUM> is, for example, riveted or welded together with the first mounting seat <NUM>, and the second end <NUM> of the first elastic restoring member <NUM> is extended obliquely toward the groove bottom of the first mounting groove <NUM>, thereby having an inclined surface. A first locking member <NUM> is located on the second end <NUM> of the first elastic restoring member <NUM>. When the pulling force received by the first driving pin <NUM> from the first pulling rope <NUM> is greater than the pressing force received by the first driving pin <NUM> from the first elastic restoring member <NUM>, the first driving pin <NUM> slides in the first slideway <NUM> and pushes the inclined surface of the first elastic restoring member <NUM> at the same time, so that the inclined surface of the first elastic restoring member <NUM> is elastically deformed, and the first locking member <NUM> is forced to be retracted from the first through hole <NUM>. When the pulling force received by the first driving pin <NUM> from the first pulling rope312 is smaller than the pressing force received by the first driving pin <NUM> from the first elastic restoring member <NUM>, the inclined surface of the first elastic restoring member <NUM> drives the first driving pin <NUM> to slide reversely in the first slideway <NUM>, and at the same time, the first locking member <NUM> is extended from the first through hole <NUM>.

Referring to <FIG>, the second end <NUM> of the second pulling rope <NUM> is connected to a second driving pin <NUM> and the second pulling rope <NUM> interacts with the second driving pin <NUM> through the second elastic restoring member <NUM>. In some embodiments, the second driving pin <NUM> is received in the second receiving groove <NUM> and is abutted against the second elastic restoring member <NUM>. When the support leg <NUM> is switched from the folded state to the unfolded state, the second pulling rope <NUM> drives the second elastic restoring member <NUM> to be deformed by the second driving pin <NUM>, so that the second locking member <NUM> is retracted from the second through hole <NUM>.

In some embodiments, a groove wall of the second receiving groove <NUM> is provided with a second slideway <NUM>, and the second driving pin <NUM> is in sliding fit with the second slideway <NUM>. The second slideway <NUM> is, for example, an elongated hole, and a stroke provided by the second slideway <NUM> for the second driving pin <NUM> is, for example, equal to the difference between the above-mentioned S3 and S4. Referring to <FIG>, when the support leg <NUM> is switched from the folded state to the unfolded state, the second pulling rope <NUM> pulls the second driving pin <NUM> to move rightward and downward along the second slideway <NUM>, and the second driving pin <NUM> exerts a force on the second elastic restoring member <NUM> during the movement, so that the second locking member <NUM> moves rightward and upward, and is retracted from the second through hole <NUM>. When the support leg <NUM> of the child safety seat is unfolded for young children to ride, the second locking member <NUM> no longer restricts headrest <NUM> from moving downward.

In some embodiments, a middle portion of the second elastic restoring member <NUM> is provided with a second opening <NUM>, and the second end <NUM> of the second pulling rope <NUM> is provided with a second connecting ring <NUM>, and the second connecting ring <NUM> is located in the second opening <NUM> and sleeved on the second driving pin <NUM>.

In some embodiments, the first end <NUM> of the second elastic restoring member <NUM> is, for example, riveted or welded together with the second mounting seat <NUM>, and the second end <NUM> of the second elastic restoring member <NUM> is extended obliquely toward the groove bottom of the second mounting groove <NUM>, thereby having an inclined surface. A second locking member <NUM> is located on the second end <NUM> of the second elastic restoring member <NUM>. When the pulling force received by the second driving pin <NUM> from the second pulling rope <NUM> is greater than the pressing force received by the second driving pin <NUM> from the second elastic restoring member <NUM>, the second driving pin <NUM> slides in the second slideway <NUM> and pushes the inclined surface of the second elastic restoring member <NUM> at the same time, so that the inclined surface of the second elastic restoring member <NUM> is elastically deformed, and the second locking member <NUM> is forced to be retracted from the second through hole <NUM>. When the pulling force received by the second driving pin <NUM> from the second pulling rope322 is smaller than the pressing force received by the second driving pin <NUM> from the second elastic restoring member <NUM>, the inclined surface of the second elastic restoring member <NUM> drives the second driving pin <NUM> to slide reversely in the second slideway <NUM>, and at the same time, the second locking member <NUM> is extended from the second through hole <NUM>.

The above-mentioned first mounting seat <NUM> and second mounting seat <NUM> may be disposed on the middle of the backrest <NUM> and be arranged to be spaced apart from left to right.

In this embodiment, the headrest limiting device <NUM> includes both a first locking member <NUM> and a second locking member <NUM>. However, in practical applications, the headrest limiting device <NUM> may only include one of the first locking member <NUM> and the second locking member <NUM>. Only one of the first locking assembly <NUM> and the second locking assembly <NUM> associated with the first locking member <NUM> and the second locking member <NUM>, respectively, may be provided accordingly.

The headrest limiting device <NUM>, the first locking assembly <NUM> and the second locking assembly <NUM> may 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 member <NUM> and the second locking member <NUM> are abutted against and engaged with the blocking block <NUM> to restrict the headrest <NUM> from moving upward and downward. In other embodiments, the blocking block <NUM> may not be provided, and the first locking member <NUM> and the second locking member <NUM> may be, for example, directly abutted against and engaged with the headrest <NUM> to restrict the headrest <NUM> from moving upward and downward.

In the above-mentioned embodiments, the child safety seat <NUM> in which the seat <NUM> is pivotally connected to the base <NUM> is used as an example for description. In other unshown embodiments, the headrest limiting device <NUM> of the embodiment of the present application may also be applied to the child safety seat <NUM> in which the seat <NUM> is fixedly connected to the base <NUM>. In this case, a first guide structure or a second guide structure (not shown) may be disposed on the bottom portion of the base <NUM>. The second end <NUM> of the first pulling rope <NUM> passes through and is guided upward by the first guide structure, and then, is operably connected to the first elastic restoring member <NUM>. The second end <NUM> of the second pulling rope <NUM> passes through and is guided upward by the second guide structure, and then, is operably connected to the second elastic restoring member <NUM>.

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.

Claim 1:
A child safety seat (<NUM>), comprising:
a base (<NUM>) provided with a pivotable support leg (<NUM>);
a seat (<NUM>) having a backrest (<NUM>), the backrest (<NUM>) being provided with a height-adjustable headrest (<NUM>);
a headrest limiting device (<NUM>) operably connected to the support leg (<NUM>), characterized in that
a first locking member (<NUM>), wherein when the support leg (<NUM>) is in an unfolded state, the first locking member (<NUM>) is in an extended state, so that the first locking member (<NUM>) is capable of being engaged with the headrest (<NUM>), thereby limiting an upper adjustment height (H1) of the headrest (<NUM>), and when the support leg (<NUM>) is in a folded state, the first locking member (<NUM>) is in a retracted state; or
a second locking member (<NUM>), wherein when the support leg (<NUM>) is in the unfolded state, the second locking member (<NUM>) is in a retracted, and when the support leg (<NUM>) is in the folded state, the second locking member (<NUM>) is in an extended state, so that the second locking member (<NUM>) is capable of being engaged with the headrest (<NUM>), thereby limiting a lower adjustment height (H2) of the headrest (<NUM>).